MODEL / BUILDER volume 8, number 82 $2.00 NOVEMBER 1978 ÅA the beginning. These two im peccably finished finished peccably im two These beginning. the your servos and receiver. Just install radio gear, gear, radio install Just receiver. pre-formed, and a servos included your even We’ve glow even assembly. and of belt, in engine, starter with tank, generation fuel rods, complete new control is a Each signal kits. beauties ready-to-run fiberglass el h bx sat or nie n si away. sail and engine your start hold box, to the cover seal clear with box hours waterproof long no buy, fiberglass, to hardware No installed. plug stern to stem from Complete ready-to-float boats MRC's Trol jet drive in each boat replaces conventional conventional replaces boat each in drive jet reverse in Trol even anywhere, Run and hydro with engine complete come muffler, Turbo-Trol hydro jet propulsion system, system, propulsion jet hydro Turbo-Trol muffler, jet system propulsion installed prop and rudder assem blies. So if by chance you you chance by if So blies. assem rudder and prop udr o ed Ad ih h iple inside, impeller or the prop with no And there’s bend. shore, on to up rudder boats your run AND ΕΝΙΟΥ AND JUST ADD WATER DL FER C P AI 2500 , N RATIO RPO CO R IFIE T C E R ODEL M . . . and that’s just just that’s and . . . e hmbt opee and complete both them See . . . unique Turbo Turbo unique . . .

BIG VNE DS NJ 08817 N.J. , N EDISO AVENUE, DBRIDGE O O W ready-to-run at your hobby shop. hobby your at ready-to-run find each an exceptional value. M RC’s RC’s M value. exceptional an each find THE PRICE IS RIGHT RIGHT IS turn PRICE you lets THE drive jet MRC new this more, What’s you’ve nothing to buy, most everything is not only only not is everything most buy, to nothing before. you’ve never like maneuver and dime, a on channel dam­ two a major While or stump. a prop, hit your should in you if weeds age no be there’ll reverse thrust of the Turbo Trol for backing up. up. control backing for you let Trol will Turbo the of channel thrust third reverse a runabouts, ready-to-float yacht or racer . . . for for . . . racer or yacht ready-to-float radio is all that’s needed for either of these two two these of either for needed that’s all is radio included in the box, but installed, you’ you’ installed, but box, the in included meit ejyet ut d water. add just enjoyment immediate Rdoeupet hw snt Included) not is shown equipment (Radio H M THE 0V aie installed. Marine 40TV H CBAJT SPEED BOATJETTHE COBRA eca iih 3" og MRC-Enya long. 36" finish. colored gelcoat brightly with fiberglass Sturdy semi V contour tor stability Almost 40" long. 40" Almost stability tor Vcontour semi adoe rge fbrls, lt bottom, Ilat fiberglass, rugged Handsome, R-na 5IT aie installed. Marine 35IIITV MRC-Enya „ JRNB PLEASUREYACHT JARINEB r„_ , Turbo-Trol jet drive, which comes installed installed comes which drive, jet Turbo-Trol t rudder to damage .. . you get increased increased get you . .. todamage t rudder maneuverability, and can run in reverse. in run can and maneuverability, nec ba, en hr’ n rp or prop no there’s means boat, each in . . . and when you consider consider you when and . . . L [ CARL GOLDBERG ^ w \ ( Me NEW

ΜΛΡΖΚ I I

AREA 558" SQ. IN. WEIGHT AV. TO 5% LBS. FOR .30 TO .40 ENGINES and 4 CHANNEL RADIO

The newly updated Skylark Mark H is a sharp, sport airplane with many new features, strong construction, and great flight performance! If you want a fun- to-fly ship with pattern capability, here's why the Mark Π is the one for you!

Wider and longer front end Stronger wing with new sym­ for larger engines and tanks. metrical airfoil. Sufficient thickness for retracts. Sim­ Complete hardware, includ­ plified wing "bolt-on" op­ ing new snap-on hatch hold­ tion illustrated. downs, hinges, wing skids, etc. Streamlined canopy, detail molded cockpit, and large Tapered ailerons, and full decal sheet. aileron hardware. Greatly improved plans, with Heavy duty landing gear and large, well-organized build­ steerable nosegear. ing illustrations. Strengthened and simplified fuselage construction. K it G 2 I I I 4 9 9-5

For best service, see your dealer. If not available, write direct; add 50ζ per item ($1 outside U.S.). AVAILABLE IN CANADA CARL GOLDBERG MODELS INC. 4736 WEST CHICAGO AVE.· CHICAGO. ILLINOIS 60651 IN THE BEST CIRCLES, ITS ttber skiver

A PRECISION INSTRUMENT FOR THE DISCRIMINATING MODELER

Safe, Rear Draw-Bar Clutch Available in seven satin anodized handle colors: Precision, Instrument-Quality Materials silver, blue, red, green, gold, copper, violet. Complete set in fitted hardwood case; includes Strong-Holding Advanced Collet Design uber Skiver, together with two vials containing Non-Rolling Hex Cross-Section four No. 11, and one each of Nos. 10, 12, 15, and 2 0 ...... $14.95 Deeply Knurled, Non-Slip Grip Individual handles (specify color) $5.95 Long-Life, Stainless, Vial of 6 blades (No. 10, 11, or 15) $2.10 Surgical Steel Blades (No. 12 or 20) $3.30 20 £ See your dealer, or order direct. Dealer inquiries are invited. MODEL BUILDER PRODUCTS All direct orders sent postpaid in U.S. California residents add 6% sales tax. 621 West Nineteenth St., Costa Mesa, California 92627 If you are considering the purchase of a Kraft rad system, you may be impressed with our obvious 110 c°ntro| and superior performance. However, you may notquality the many little features of our systems that make1 be aware feet drive servo mechanics in their utility, convenience, and accuracy. a b,9 differ(

Crimped wire

For example, we manufacture our own connectors which gold-plated beryllium copper pins and sockets for lonqC|ii corrosion and vibration resistance. Wires are crimp conn Our servos are molded of long wearing rugged nylon rather than rather than soldered to minimize wire lead breakage the cheaper short life materials used in competitive servos. For accuracy, our servos have their reference potentiometers ac­ tuated directly from the output drive rather than indirectly Built-in charge receptacle through a gear which, because of gear teeth backlash, adds to centering error.

Clockwise and counterclockwise servo rotation Servos are supplied with four or more channel sets, two rotating clockwise and two counterclockwise. This feature greatly simplifies the radio control in­ stallation.

Open gimbal control sticks A charge receptacle is Our control sticks are the wired into our switch harness so that you may charge your open gimbal type for model without the inconvenience of disassembly. Other systems better feel and ac­ require that the battery pack must be disconnected from the curacy. Their design receiver and be connected directly to the charger. eliminates any possiblity of centering error and is self com- Plug-in receiver antennas pensating for wear.

These are but a few of the fine points which when added together make our radio control equipment the world's finest Write for our free catalog and get the complete story. A plug-in receiver antenna is standard antenna with all receivers. This means that you may mount t e gtan_ permanently in your model. Extra antennas are avai a tennas 450 W. California Ave. dard and special RF loaded short lengths. The short a P.O. Box 1268 are especially convenient for small aircraft, cars, an Vista, California 92083 (7 14) 724-7 146 LIGHT WEIGHT

POWER SPEED

BANTAM BY NOVAK ELECTRONICS MIDGET

Finally, you can purchase a servo that is light enough to fly a 1/2A airplane, and strong enough to fly a big .60. NOVAK ELECTRONICS proudly announces the introduction of the BANTAM M IDGET SER V O . By working closely with Dick Rehling, of D&R Products, we have been able to produce a servo that has the power, strength, speed, and durability to perform in any type of air­ plane. These new servos use the highly advanced Signetics 544 IC, offering internally regulated power supply, dynamic braking, linear ramp timing, and an exclusive temperature-compensated dead-band circuit. Servo reliability is further enhanced by the use of the Clarostat conductive plastic potentiometer and external silicon drive transistors.

NOVAK ELECTRONICS IS INTRODUCING SPECIFICATIONS FOR BANTAM MIDGET A NEW CONCEPT IN AIRBORNES. TORQUE: ...... 21 oz. in. Choose one of our colors to mix or match TRANSIT TIME: .. 0.3 seconds/WO degrees with your existing equipment. Tell us your SIZE (inches):...... 1.125H x 0.6W x 1.43L radio manufacturer, and we will supply servos, WEIGHT: ...... 24 grams, or .846 ounces battery packs, and switch harnesses with the OUTPUTS: Rotary wheel, arm, adjustable proper plugs and specifications to match your arm. Compatible with A L L 3-wire digital radio system. systems, except Pro Line.

BANTAM M IDGET, Assembled ...... $29.95

Battery, 100 MAH, Square (35 gms, 1.2 oz.) . . $15.95 Battery, 250 MAH, Square (60 gms, 2.1 oz.) .. 15.95 Battery, 450 MAH. Square, (100 gms, 3.5 oz.) . 15.95 Battery, 450 MAH, Flat, (100 gms, 3.5 oz.) . . . 15.95

Miniature Switch H a rn e ss...... $7.95 Switch Mount, Bulkhead ty p e ...... 1.00 Tray, Bantam Midget, Vertical...... 1.00 Tray, Bantam Midget, Side M o u n t ...... 1.00

WHEN ORDERING. PLEASE SPECIFY YOUR BRAND OF R/C SYSTEM AND COLOR PREFERRED (W HITE, 8LACK, RED, BLUE, YELLOW, ORANGE. IVORY). NOW! Also available in K R A F T G O LD .

COD, Shipping, Handling, and Insurance .... $2.50 Actual Size Cash, Money Order, Bank Draft, Certified Check, Shipping, Handling, and In su ran ce...... 1.00

Three weeks delay on personal checks. DEA LER INQUIRIES PROMPTL Y ANSWERED Foreign orders add 15% California Residents, add 6% Sales Tax

NOVAK ELECTRONICS, 1915A, South Evergreen St., Santa Ana, CA 92707 Ph. (714) 549-3741

2 MODEL BUILDER •m—— BIC SAVINGS AT ORANGE COAST HOBBIES LEISURE ELECTRONICS LION FUEL I Reg. $99.95 GALLONS PRICE SALE

#1-10% NITRO S 9.90 $79.98 #2-20% NITRO $10.80 #3-30% NITRO $11.70 #4-40% NITRO $12.60 RESISTOR CAR WITHOUT RADIO - 6 CELL

Choose from Alfa, Vette or Porsche Body Style Formulated expressly for R/C car use. Consist- ant formulation and cool running are the reasons the car racing champions use this fuel!

NEW ASSOCIATED ASSOCIATED WANTTO BE A FAMOUS RACEDRIVER?...JOIN ELECTRIC “ ELECTRIC” THE ORANGE COAST HOBBIES RACING TEAM. 1/12 SCALE ELECTRIC R/C RACE CAR ASSOCIATED RCI Complete Car BY ASSOCIATED List $135. OCH Reg. Low Price $119 95 SPECIAL LIMITED OFFER

RC100 $99.98 RC200 . $149.95 THORPE THORPE D ^FEffEM TtAi AjJQVAT - TRANS* 5 ON 6 CELL- THORPE $195.00 .mih 1M2th CHOCt or ANV Bour Ready to Run Scale TITAN CHASSIS... :$ i= s'·? K, - Less Radio RACING CAR $149.95 TECHNI MODELS 011 BLADES /5 Pk R/C GLIDER KIT SPECIALS 049/051 GLOW PLUG List 65c CONVERSION WANDERER 72" $14.96 39c WANDERER 99" $22.88 BRIDI SOAR BIRDI $14.88 Ί.99 (Fit X-Acto. PO. PIERCE PARAGON $39.88 Dixun, small CASS STEIN SKYBOLT (glass) $79.88 handles) BANTAM MIDGET 12V 5A WET CELL BATTERY HB 12 R/C-mulller »29.68 and CHARGER HB 15 R/C-muffler 34.88 &/· ImchM) 1 I » HB20 R/C-multler 39.88 M « 0 6W i » 431 Weight 24 gram» HB 25 R/C-mulller 39 88 or 846 Ounces “Λ HB 40 POP 59.88 Outputs Rotary wheel, arm, ad­ HB 61 POP 79.88 justable arm. Compatible with ALL digital radio systems, except Pro « S t ONE OF THE FINEST LINES OF ENGINES Line Specify radio $ 2 9 .9 5 WISCO ORANGE COAST HOBBIES QUADRA 14HA BaookliuRST S t ... W est «umím, Calif. 9268» i u U l v c u v 2cu. in (or those big birds! S HI TO«« STARTER Retail »149 95 ( 714) 879-8844 <99.88 *21.88 TO ORDER: SEND MONEY ORDER OR CREDIT CARD NO. & EXP. DATE N0CHECKS-C 0.DSADDS1 00 CALIF RESIDENTS ADO 6% TAX ABUILA U S SHIPPING CHARGES AK HI. ΑΡ0. ΕΡ0 3 00 MONOKOTE /IPS 00000 THRU 49999 2 75 GLASS FUSELAGE 50000 THRU 79999 <2 00 LIST $29.95 80000 THRU 99999 1 50 Opaques & Transparents *4.99 LARGE KITS. HEAVY BOXES. ADD ADDITIONAL $1 00 Flats & Metallics J5.99

NOVEMBER 1978 3 OLDIES (BUT STILL GOODIES!) MOST BACK ISSUES OF "MODEL BUILDER" ARE STILL AVAILABLE, THOUGH SOME ARE IN SHORT SUPPLY. ORDER NOW, WHILE THEY LAST! PRICES VARY ACCORDING TO QUANTITY REMAINING IN STOCK. NOTE SPECIAL ANNIVERSARY PRICES LISTED BELOW!

November 1971 December 1971 Januaey 1972 Nancy. R/C soarer. Curtiss-Wright Junior SHOCer F/F by Mel R/C Pattern World R/C 2" scale. Schmidt. Championships. R/C Twin Trainer White Trash, famous Peanut Fokker D VI. 75" span, for ,40‘s. R/C soarer. LSF Tournament story. Peanut Laird LC-DC. Peanut Ord-Hume. Bi-Prentice, R/C bipe Volksplane 3V-1 Chet Lanzo's famous trainer. 3-views. rubber Puss Moth. How to build light Curtiss Robin 3-views. "wire" wheels. Vol. 1, No. 2 $3.00 Vol. 1, No. 3 $2.00 Vol. 2, No. 4 $1.00

February 1972 Mar/April 1972 May 1972 Minnow U/C profile Yankee Gull R/C glider Seahorse II, R/C sea­ scale racer. 8' to 12' «ran. plane. For .19-.35. D.H. Humming Bird. Fokker E-Ill R/C Kale. Miss Cosmic Wind, QM Al Vela's E-Z Boy 1/2A R/C Pylon racer. F/F or R/C pulse. E-Z Boy 1/2A, Al Vela. Peanut Scale Bucker Peanut Fokker V-23. Peanut Ford Flivver. Jungmann. Whetstone 1/2A U/C Fiberglassing over balsa, Siebel 1/4A F/F «ale. combat. by Le Gray. Mr. Mulligan 3-views. Ryan S T 3-views. Spoiler, FA I Combat. FAI power "Folder." Tethered Cars, R/C sail. Vol. 2. No. 5 $3.00 Vol. 2, No. 6 $1.00 Vol. 2. No. 7 $2.00

June 1972 July 1972 August 1972 Bob White Wakefield. Fairchild 51, 1" Kale, Bonzo standr ' R/C Mongster QM biplane R/C or F/F. sport ρ ν ^ κ β ίβ . J' R/C pylon racer. SAM-5 A/2 Nordic. Counter/' O aihess Calif. Coaster R/C 1912 Avro G rubber. A/1 Λ Jic. m glider. Sheet wing. Comanche C stand-off Shoes' R/C QM. 1 Three profile Peanuts. R/C Kale. P e a r ^ aylorcraft on Deperdussin 3-views. Travelair 2000 2" Kale .ts, alto big one. Pasco Special 3-views. R/C, by Editor. Fairey Delta 3-views. Σ Chester Jeep 3-views...... 1 Vol. 2, No. 8 $3.00 Vol. 2. No. 9 $4.00 Vol. 2. No. 10 $4.00

Feb/March 1973 April 1973 May 1973

Profile F4U Corsair C/L Fabulous PEA POD, Bantee mini-pattern R/C stunt, .40 power. R/C sailboat. 3channel, .19 power. Beecroft's Satan, Class A Briegleb BG-12, Kale Woodwind A/2. all sheet free flight. R/C soarer. covered wing. Indoor Ornithopter. R/C Spirit of St. Louis, Slope soaring technique. Peanut Travalair 2000 semi-Kale, .049-.09. Teakettle, twin-boom PT-3 Scale Views. Peanut Volksplane CO 2 pusher. Thermal hunting with Finish painting of rub­ Peanut Monocoupe 110. R/C gliders. ber Kale models. Aerbo, .020 Replica, OT Vol. 3. No. 16 $2.00 Vol. 3. No. 17 $3.00 Vol. 3, No. 18 $1.00

...... Apr. 75 2.001 Put a check mark ( ) by the back issues you SPECIAL I I I : May 75 3.001 wish to order. Magazines will be mailed by Sec­ Jun. 75 1.251 ond Class, postpaid. Foreign orders (except MODEL BUILDER MAGAZINE'S j Jul. 75 *1.251 Canada, Mexico, FPO, APO) add 30tf Per copy. • 5th A N N IV E R SA R Y B A C K-ISSU E S A L E ! I J Aug. 7502.001 # · Sap. 75 01.251 Allow about four weeks for delivery. If United •ANY ISSUE MARKED WITH "o " 75 Cents! j Oct. 75 01.251 Parcel Service (UPS) is desired, add 80tf mini­ Nov. 7501.251 mum for up to two magazines, or add 804 plus • ANY ISSUE MARKED WITH " · " 50 Cents! * Dec. 7 5 0 1 251 1(ty for each additional magazine on orders for three or more. Send check or Money Order (no fc...... Jan. 76 01.501 Feb. 7601.501 cash, please, and no COD’s). A facsimile of this Nov. 71 $3.00( ) May 73 01.001 I Apr. 7401.001 ) Mar. 7601.501 order form may be used. Dec. 71 2.00 ( ) Jul. 73 *1.001 ) May 74 1.001 ) Apr. 7601.501 N am ·:______Aug. 73*1.001 ) Jun. 7 4 * 1.001 ) May-76— 1.601 Jan. 72 0 1 . 00( ) Sap. 73*1.001 I Jul. 74 01.001 ) Jun. 7601.501 Fab. 72 3.001 ) Oct. 73*1.001 ) Aug. 74*1.001 I Jul. 76 01.501 Address:______M/A 72 *1.001 ) Nov. 7301.001 ) S/O 74*1.001 ) Aug. 76 through May 72 2.001 ) Dec. 73*1.001 ) Nov. 7401.001 ) June 78,1.501 I City: ______State: Jun. 72 3.001 ) Dec. 74 01.001 ) July 78 Sold Out Jul. 72 4.001 ) Jan. 74 01.001 ) Jan. 75 0 2.001 I £3; 782!oo(ate) PLEASE PRINT ^ z i p : ______F/M73 2.001 ) Fab. 74*1.001 ) Fab. 75 2.001 > Apr. 73 3.001 I Mar. 7401.001 ) Mar. 75 2.001 ) M ODEL B U ILD ER , 621 West Nineteenth St.. Costa Mm , Ca. 92627 4 MODEL BUILDER MODEL& NOVEMBER 1978

BUILDER volume 8, number 82 621 West Nineteenth St., Costa Mesa, California 92627 Phone: (714) 645-8830

STAFF CONTENTS

EDITOR FEATURES Wm. C. Northrop, Jr. WORKBENCH, Bill Northrop ...... 6 GENERAL MANAGER OVER THE COUNTER, Eloy Marez ...... 7 Anita Northrop R/C WORLD, Bill Northrop...... 12 EDITORIAL ASSISTANTS "1 tO 1”, R/C SCALE, Bob Underwood...... 22 Phil Bernhardt Eloy Marez THE FLIGHT INSTRUCTOR, Dave Brown ...... 25 ASSISTANT GENERAL MANAGER SCALE AT THE NATS, Tom Stark...... 26 Edie Downs R/C FORUM, Hal d e B o lt...... 31 ART DEPARTMENT MB VISITS PETE WESTBURG, Pete Weslburg/Phil Bernhardt...... 32 Chuck Blackburn HALF-A SCENE, Larry Renger...... 34 Al Patterson R/C PYLON, Jim G a g e r...... 36 OFFICE STAFF Georgi Gilleran PYLON AT THE NATS, joe Klause ...... 38 Ron Hutto CHOPPER CHATTER, John Tucker...... 40 Pat Patton MAMMOTH SCALE, Ron Shettler...... 42 A. Valcarsel R/C SOARING, Dr. Larry Fogel...... 45 CONTRIBUTING EDITORS 10 WAYS TO LOSE A SAILPLANE CONTEST, Dave Thornburg ...... 48 PLUG SPARKS, John P o n d ...... 49 George Aldrich Mitch Poling FUEL LINES, George Aldrich, joe Klause, Otto Bernhardt...... 54 Dave Brown John Pond Rod Carr Bob Preusse KRAFT KP-4A/KP-6A REVIEW, Eloy M are z...... 60 Hal deBolt Fernando Ramos FROM POWER TO SILENT FLIGHT, jim Kitchen ...... 62 Larry Fogel Larry Renger ELECTRIC POWER, Mitch Poling...... 64 Jim Gager Dan Rutherford Chuck Hallum Ron Shettler R/C AUTO NEWS, Chuck Hallum ...... 66 Bill Hannan Bob Stalick R/C POWER BOATS, Bob Preusse/Jerry Dunlap...... 68 Dale Kirn John Tucker Walt Mooney Bob Underwood STRICTLY SAIL, Rod Carr ...... 74 H A N N A N ’S H A N G A R , Bill Hannan ...... 77 F/F SCALE, Fernando Ramos...... 82 ADVERTISING REPRESENTATIVE FREE FLIGHT, Bob Stalick ...... 86 WEST: Bob Upton, 20626 Clarendon Ave., Woodland Hills, California CONTROL LINE AT THE NATS, joe K la u se ...... 94 91364

Subscriptions $20.00 per year, $37.00 for SCALE VIEWS two years. Single copies $2.00 Add $3.50 CURTISS F9C-2 "SPARROWHAWK”, Peter westburg...... 56 for postage per year outside of U.S. (ex­ cept APO). Copyright 1978 by MODEL BUILDER CONSTRUCTION Magazine. All rights reserved. Reproduc­ TRAVEL AIR D4D, Bill Seidler...... 16 tion without permission prohibited. G A R A M I’S G U LL-W IN G , Al Patterson/Phil Bernhardt ...... 52 Published monthly by MODEL BUILDER Magazine, 621 West Nineteenth St., Costa PEANUT IKARUS IK-2, Walt M o o n e y...... 79 Mesa, CA 92627. Phone (714) 645-8830 PAZMANY PL-4A, Leon Bennett...... 90 Change of address notices must be re ceived one month before date of issue that new address takes effect Send old address with new: old label preferred Post Office will not forward copies unless C O V ER : Modelers who competed in R/C Pattern or Scale at the 1978 Lake Charles Nationals will recognize the name on this month's cover credit. It's U SPJA judge you pay extra postage Duplicate issues Bill Seidler, Hollywood, Florida, who was one of the Site Directors. His Travel Air D4D cannot be sent on the cover comes from a long association with the full size aircraft, including the Second Class postage paid at Costa ship in which he earned his pilot's license, back in 1937. Final finish is red Hobbypoxy over well-cured nitrate dope. Construction article begins on page 16. Mesa, California, and additional offices

NOVEMBER 1978 5 0 / / / N o r t h r o p ' * w o r k b e n c h

• We're glad to see that interest is growing in the Indoor R/C Record Trials, which will be a star attraction of the 1979 International Modeler Show, scheduled for January 6 and 7, at the Pasadena Center, Pasadena, California. Incidentally, those spectators and exhibitors wno plan to attend the show, sure had an opportunity to Another photo out of the old scrapbook. MB's editor checks out hisdeBolt P-39 "Cobra" "case the joint” by national TV on before taking off from the former Delaware R/C Club flying field, now a housing develop­ Sunday, September 17, 1978, when ment. The radio was an Orbit, built under license in Canada. Engine was a Super Tigre .46 the Emmy Awards Show was held R/C. Photo taken around the fall of 1968. and broadcast from the center. You'll probably also get an aerial problem remind you of the plan­ WRAMS Club, hosts of the White view of Pasadena on New Years Day ning that went into the designs built Plains, New York Consumer Trade in connection with the famous ana to capture the well-published man- Show. colorful Rose Parade and Rose Bowl powered aircraft prize. Rather than “Westchester Radio Aero/Mod- football game. disclose any of the ideas being elers Inc. (WRAMs), sponsors of the The tentative rules for the trials, as worked on, we’ll only indicate that annual Eastern States R/C Jamboree, published in the R/C World column most are going for large models of officially opened its new 80-acre of the September, 1978 issue of about 3 sq. ft. wing area (the maxi­ flying site in Patterson, New York on Model Builder, still stand, with just mum wing loading allow ed is 4 July 15. Rented or leased fields had one additional specification and oz./sq. ft.) and large, geared, elec­ been used for many years by the 60- one clarification. The use of one- tric-powered props. Mitch Poling member club. shot, non-rechargeable batteries, talks a little bit about LTA design "Town officials and residents such as silver chloride, lithium parameters in his Electric Power were invited for a ribbon-cutting chloride, and lithium air cells will column next month. ceremony which was followed by a not be allowed. Standard or alkaline Pre-registration in the trials is large static display of models and by dry cells, and of course, nickel- required so we can schedule flying flying demonstrations. cadmiums. are OK. Power for the time. Write to Model Builder (Re­ "Tne field is set in gently rolling lighter-than-air category may be cord Trials), 621 West 19th, Costa hills and features a 225 x 400-foot CO 2, rubber, or electric, but no Mesa, CA 92627 for a copy of the grass runway on high ground.” “ It's internal combustion engines. Heli­ rules and registration form. Entry is the kind of oeautiful spot you’d like um, of course, is the only LTA gas FREE! to go to even if you’re still building that may be used. WRAMS AIR PARK after pranging your last airplane, We have talked to several mod­ It's always encouraging to read said Club President Joe Wimbrow. elers who intend to enter the trials, about anotner successful acquisition “ The parking area has space for and their various approches to the of a flying field. This time it’s the Continued on page 144 6 MODEL BUILDER OVER THE COUNTER

• ACE R/C has just announced a pulse inverter can be purchased; at $4.98, and along with the Bantam new addition to its family of servos No. 14G18, at $2 each. One for each Midget and thousands of other in the popular Digital Commander servo is required. items for the R/C’er, can be obtained line of R/C kits. It is the Bantam Ace R/C has just introduced an­ from many dealers here and over­ Midget, the little brother of the other handy item . . . a charger that seas, or directly from Ace R/C, Inc., well-known and respected Bantam can be used for properly charging Box 511, Higginsville, MO 64037. servo. Though smaller in size, the battery packs of from 100 to 500 mils. Bantam Midget boasts the same It includes a wall-type transformer * * * torque and gear strength as the and all necessary components, in­ The most obvious thing at any R/C larger Bantam, at a lesser weight and cluding an assortment of resistors boat race is that K&B engines are faster speed. from which you can pick the proper always behind! The size of the Midget is 1.125 one to adjust the rate as desired. Behind on the boat, that is . . . high X 1.43 longx.6incheswide,and Receiver or transmitter packs can be which in most cases is the one that is the weight is .85 ounces. The thrust charged. No conector is furnished, leading the pack; K&B marine is rated at 20 in.-ozs., and the time so that the proper one required for engines have proven themselves in for 90 degrees movement is under .5 your equipment can be installed. R/C boat racing as beng extremely second. The new "Uni-Charger" is priced powerful and reliable. The amplifier uses the proven Signetics 544 Integrated Circuit, with external driver transistors. A conductive plastic pot element and other high-quality components add up to '^competition quality” at a economical price. The Bantam Midget will work with any modern positive pulse R/C O N LY VA " LONG system, and is furnished without FILTE R S IN EITHER DIRECTION connectors so it can be matched to your system. A wheel, arm, and adjustable arm are furnished. The Ace Flite Packs and complete systems are also now available with tne Bantam Midget. Details can be obtained upon request. The Miaget is priced at $28.95 CLEAN BY BACK FLUSHING. assembled and tested; $23.95 in kit form. For owners of Pro-Line and ‘Final Filter", by Du-Bro. other negative pulse systems, a

“ Uni-Charger", wall-type battery charger, from Ace R/C, Inc. Impressive new "Bantam Midget" servo, from Ace.

NOVEMBER 1978 7 T uned pipes and adapters for the HB .40, .50, and .61, from Bavarian Precision Products.

Quarter-scale Gnome rotary engine dummy cylinder, from Williams Bros. And there is a variety from which to choose; from the 3.5 cc (.21) Inboard and the only-one-in-its- class 3.5 cc Outboard, to the .40 R/C Marine Sport engine. Soon to be released will be a 7.5 cc (.45) Inboard Marine racing engine, designed with all the well-known and proven K&B features, and the maximum displacement allowable under NAMBA and IMPBA rules. All K&B inboard engines come completely equipped with water- cooled heads, flywheels, and cou­ plings. The 3.5 cc Outboard, being unique, is 100% complete, requiring only that it be bolted to the transom, K&B's soon-to-be-released 7 .5 cc (.45) Inboard Marine racing engine. ana the steering, throttle, and fuel connections be made. and get your name on the list. More and more Mammoth Scale Complete instructions are in­ Further info from Elite Tom's pit cluded with each engine, and parts airplanes, and more and more ac­ are always readily available. Look for crewman, BobbyTom,atK&BManu- cessories for them are showing up facturing, 12152 Woodruff Ave., every day. I wonder if Eddie Morgan the .21's and the .40 at your local Downey, CA 90241. boat shop. The .45? Well, it is on the really intended them to get that big? way ... we suggest you hurry down So much for a bad pun.. . let’s get

New engine mounts from C.B. Associates are the C.B. .90, for Pressure-sensitive letters and numbers, indifferent sizes and colors, monster engines, and a long and short 1/2A mount. are now available from Applied Design Corp.

8 MODEL BUILDER to the important things, such as Mammoth Scale accessories. Being right in the thick of things with its wheels and pilot (MB, October 78), Williams Bros., Inc. has added yet one more interesting item. It is a 1/4-scale Gnome rotary engine cylinder, which will greatly ease the task of making dummyscale engines for pioneer and WW-I models, while providing more detail than most of us will spend the time to roduce. The cylinder is molded of igh-impact styrene, and has spark plug and exhaust valve detail built in. Stand-Off Scale Hawker Hurricane, manufactured in England, is now available in the U.S. Only $1.95 each, from the many dealers who sell the many fine products produced by Williams Bros., Inc., 181 Pawnee St., San Marcos, CA 92069. * * * Bavarian Precision Products, the US distributor of the German-made HB engines, has just announced the availability of HB-designed and manufactured tuned pipes and adapters for its .40, .50, ana .61-size engines. The pipes and adapters are fin­ ished in a distinctive black finish that is claimed to dissipate exhaust heat more effectively than convention­ ally finished pipes. All necessary The T2-40, a .40-powered version of the-T2-A pattern ship, by Bob Smith R/C Aircraft. hardware and silicone tubing are included, as are instructions for installation. pollution out of their products, but Inc., 480 Bonner Rd., Wauconda, IL 60084, and its many dealers. Though designed specifically for junk can still get into tne fuel and to maximum performance of the HB the engine in many ways. * * * engines, these pipes and adapters So be safe . . . use a filter. And take C.B. Associates,themanufacturers can also be used with engines of a look at the “Final Filter” from Du- of those nice cast-aluminum engine similar displacement and porting, Bro Products. It can be used either mounts has added to the line ... at and should give a significant in­ between the fuel can and the tank, both ends. crease in power and performance. or between the latter and theengine, At one end, there is a new CB .90, For additional information, write and is claimed to have twice the fuel for the Webra .91, O.S. .90, and Bavarian Precision Products Co., filtering capacity of most other other large engines. It looks much P.O. Box 6, New Canaan, CT 06840. filters. The large filter area, using a like all the others, except, of course, 130-micron polyester screen, does * * * that it is larger, having a 1-3/4 inch not restrict flow, though it is capable spacing between the 3-1/16 inch If you are not filtering your fuel, of filtering out thesmallest particles. long beams, as measured from the ask yourself why not. After all, you The outer case is aluminum, for firewall. The back is drilled for five paid plenty for the close-fitting durability and lightness. Cleaning No. 8 machine screws, three on top engine, and certainly shouldn’t be can be accomplished by back flush­ and two on the bottom. happy about its grinding itself away. ing, and it can be installed in either At the other end are two 1/2A We are sure that the fuel brewers direction. mounts, pre-drilled for the Cox take many pains to keep abrasive Only$1.75,from Du-Bro Products, .049/.051 engines. One is a short

From Steve Muck's R/C Boats, the "Mighty Dolphin" deep-vee. Stern drive hardware for the "Mighty Dolphin", from Steve Muck.

NOVEMBER 1978 9 available from Testors. mount, with the rear engine mount­ ing screw at a distance of 7/16 of an inch from the firewall. The longer mount has the rear screw at 1-3/32 of an inch from the firewall. Both mounts are drilled to accept No. 2 sheet metal screws, which are fur­ nished. The .90 mount is $9.95; the 1/2A New finishing kits for plastic models, by Testors. mounts are $2.45 for the short and $2.55 for the long model. models of the CB mounts at the World War II Hawker Hurricane C.B. Associates’ Bob Seigelkoff nearest hobby shop, or inquire from fighter, manufactured by Mick has informed us that a new Quadra CB Associates, Inc., 21658 Cloud Reeves Models, in England, is now mount will be available soon. We Way, Hayward, CA 94545. available in the US from Ponchart- will have further news for you about * * * rain Distributors, Inc., 901 Veterans it as soon as it is released. Blvd., Metaire, LA 70005. At this Look for these and all previous A 1/6-scale kit for the well-known scale, it comes out to 80 inches in wingspan, and a finished weight of 10-1/2 pounds. It is claimed to De an excellent performer with a good .60 in the nose. It is designed for Stand-Off Scale, though it would be a serious con­ tender in Precision Scale, requiring only the additional detail necessary for that class, and a slightly smaller horizontal tail. The wing is foam, pre-covered with hardwood veneer, requiring only joining and the cutting out of the ailerons and flaps, if used. The fuselage is built up of die-cut ply­ wood, shaped balsa parts, and stringers. All parts are mounted in the proper sequence that they will be used during construction. The kit also includes a complete set of hardware, metal engine mount, fuel tank, and molded parts for the cowl, spinner, tank hatch, canopy, radiator, wing fillets, land­ ing lignts,and pilot. RAF-style decals are included and a copy of a booklet entitled "Camouflage and Mark­ ings” will help you select and prop­ erly apply a paint scheme. A detailed construction manual is also included. The "Hurricane" is available at New kites from the Hi-Flier Manufacturing Co. are the “ Fang", "Humpty Jum pty” , and the "hip-hoo-REY". Continued on page 140 10 MODEL BUILDER

As featured in John Pond's October "Plug Sparks", here's the 12-foot span. Quadra powered F7B-3M Fokker Trimotor "Southern Cross" over Port Phillip Bay, Australia, duplicating a portion of Kingsford Smith's and Charles Ulm's 1928 trans-Pacific flight.

By BILL NORTHROP

• "Young )im Jones chose the Buz­ take-off. . .Tomjacksondidmanage states, ‘‘I will not fly my model zard's Contest for the maiden flight to get the bird in the air after the aircraft in competition or in the of his Sport Scale P-51. Take-offs official flying was over!” resence of spectators until it has proved to be a bit of a problem. First The above report was quoted Eeen proven to be airworthy by flight started with a three-foot roll, from a recent model airplane club having been previously successfully then plop ... on the nose. Second newsletter. Only the names were flight tested.” “Jim Jones” used the attempt, a little further . . . plop. changed to protect the .. . well, contest for his P-51’s first flight Third attempt, it made a bee-line for that’s the point where the popular (correction . . . attempted flight), the north flight line. They yelled, movie cliche stops . . . only “Tom and the CD allowed it. ‘Take it further over next time!’ Jackson” was/nnocenf/ "Jim Jones”, Secondly, Safety Rule No. 2 under Fourth attempt, straight bee-line for the “Buzzards” club, and partic­ the heading of “ Radio Control” the judges again . . . this time chew­ ularly the club’s contest director, states, "I will not fly my model ing on tne judges’ shoes, and break­ were nothing but guilty with regard aircraft in the presence of spectators ing a spinner and nylon prop. Need­ to AMA’s Official Safety Code. until I become a qualified flier, less to say, that was nis last attempt to General AMA Safety Rule No. 1 unless assisted by an experienced helper.” We don’t know if “Jim Jones” was a qualified flier at the time, but from the description of his takeoff attempts, and the fact that "Tom Jackson'’ got the plane off the ground later, we’d suspect he wasn’t. Again, the CD allowed it. Of course, good ole AM A has to take some blame too. What is the measure of "Airworthiness” speci­ fied, and what constitutes a "Quali­ fied Flyer” , as mentioned in the safety rules? In an attempt to give these rules a measuring stick, we have officially proposed that all R/C contestants should sign a Flight Safety Declara­ tion at each contest entered, attest­ ing to the fact that both they and any and all aircraft they will use at the contest, are qualified to perform at least as well as specified by the Official AMA Safety Code for Radio Crew of the Southern Cross flight (I to r): Geoff Tuck, pilot of 9' back-up Fokker; Kieth Hearn, pilot of 12' model on commemorative flight; Bruce Hearn, Cessna 172 photo plane pilot; Doug Control. Anderson, Fokker co-builder; and kneeling, Kieth Hearn's son, Bruce, mechanic. Specifically, the flier must declare 12 MODEL BUILDER Seen at many exhibitions in Germany, this electric powered zeppelin by M. Busemeyer was star attraction at the annual Harsewinkel Flying Circus. All Circus photos by Flug Modell-Technik's editor Michal Sip.

Super Constellation is assisted to take-off position in Harsewinkel. IMo report on how The inevitable styrofoam saucer. Not for well it flew. thermalling!

Easy winner of most original design was this sulky recer by H. Wenning. Latest on list of lawn mowers, wheelbarrows, and assorted out-houses!

NOVEMBER 1978 13 Close-up of Mammoth Scale Blériot seen at Harsewinkel. Quadra- Fritz Bosch, of Microprop radios, checks trim on speed model as type engine appears to use magneto ignition. son, Mike, holds on for dear life!

The big Blériot taxies back after flight. Model could be slowed to normal walking pace while Oh no! Not clear here, but that's a ladder inflight. he's on. that he or she has previously and is Precision Scale (46.2.8) that actually This idiotic rule was supposedly put now capable of at least confidently allows a stand-by pilot, holding an in for safety. What a joke! performing a takeoff, a figure eight auxiliary “buddy-box” transmitter, Picture this . . . the “ pilot” is as described in Precision Scale, and a to take over the controls in case the nervously jockeying his overweight, realistic landing within a designated official pilot hastroublewhileflying? underpowered, tail-heavy WW-II landing area. Also, the contestant shall declare that the model(s) used in said competition has been test flown at least to the extent that it has performed the above maneuvers (substitute a towed or hand launch for R/C sailplanes). It may seem unnecessarily repeti­ tious for a modeler to sign more than one declaration, but the effort is small compared to the possibility of human injury and loss of flying sites. Disqualifying a contestanta/ter a serious accident, resulting from an untrimmed model or lack of flying ability is pointless. By the way, it should be noted that rules are made for basically honest people. Those who know they don’t ualify will be reluctant to sign a eclaration. Dishonest people pay ano attention to sporting rules, and their problem must be dealt with in an entirely different manner. * * * While we’re on the subject of Britten-Norman Islander in foreground is almost dwarfed by Hermann Sakbrook's 11 ft. span safety, are you aware of the rule in J-3 Cub. 14 MODEL BUILDER Λ

Col. Art Johnson compares notes with Pete Sherman on their P-38L's. Big one was not as scale because of T-33 nose! Unfortunately, both Pete and the P-38 were later lost in a crash enroute to Oshkosh. Art's model was construction feature in June, 1978 MB. "Jugularknot III” fighter over the transmitter for the figure eight (that’s right, the ancient scale rules still call for the maneuver to begin and end over the transmitter instead of over the center of the runway!). It’s a big contest, so our experienced “buddy-box” pilot doesn’t want to take over and cost his friend a flight (it’s cancelled if he takes over). Therefore, even though the “Jug­ ularknot” is struggling along about 100 feet up and is drifting precar­ iously over the spectators, he stays off tne sticks. Suddenly the inevi­ table happens . . . the stall, the snap, and the spin, all in a fraction of a second . . . and the only thing “Joe Expert” can do is wish he had taken over sooner. In brief, this rule is in direct con­ tradiction to the safety rules, as well as plain common sense, and must be removed and used where it does the most good . . . at the home field during an off period, where the only thing at stake is the hours of work and the cost of materials in the airplane itself. A crowded field with loads of spectators is no place to play “ Russian Roulette” with an untested airplane and/or pilot. If a modeler is not confidently capable of flying his own model without a back-up pilot, he has no business flying in the presence of spectators, let alone a whole bunch of fellow modelers Another view of Col. Art Johnson's F-82-G (see inside cover, page 11) gives an idea of its size. Continued on page 141 No trim change for single engine flight. Plane just slows up. NOVEMBER 1978 15 TRAVEL AIR D4D By B ILL SEIDLER . .. One of the sexiest looking biplanes out of the Golden Era, and a natural for model­ ing. The author is quite familiar with the design . . . he restores the full-size machines!! • "Travel Air” is a name that means trol”. They were very popular with have used for the restoration of an instant trip back into the past, the early Hollywood set. Both Wal­ full-size Travel Airs. All I had to do into a network of wires and cabanes, lace Beery, aviator/actor, and was scale it down to 2 in./1 ft. Here is a wide front cockpit and pilot be­ Robert Montgomery, anotherMGM some information on Travel Airs hind. It was quite conventional, and actor of great fame, had Travel Air that should help a scale builder. it met the requirements of the 4D’s. It was a very strong and sleek the Travel Air biplane was de­ goggled, helmeted pilots of the day airplane, perhaps one of the main signed in 1924 by Mr. Lloyd Stear­ who thought fliers had to sit in the reasons they were so popular. Wiley man, and he did such an excellent open air. The Travel Air Manufac­ Post had his first job as an executive job of designing that, throughout its turing Company, of Wichita, Kansas, pilot for F.C. Hall, the Oklahoma life, the basic dimensions of the was incorporated early in 1925, with oilman, in a 1928 Travel Air 4000. I fuselage were never changed. An Walter Beech, Clyde Cessna, and haven’t adequate words to describe outrigger gear was added later to Lloyd Stearman as the principal their airplanes and the lasting effect the B4000, BM4000and D4000. Stand­ directors. (Those names may be on the pilots who have flown them. ard and Speedwing versions, both familiar to you!) I received my license back in 1937 with Frieze ailerons, and a larger The Travel Air series of biplanes in a Travel Air B4000, NC174V, with a steel tail section for the outrigger established Wichita as the first main 220 hp-J5. It belonged to my high gear models, 'were manufactured. center of aviation in the United school teacher, Mr. Matty Mack, of All of these wings and tail sections States. They were used for mail Haaron High School, in New York. were interchangeable with all fuse­ planes, dusters, and the like. In the When I saw pictures of Wendell lages. The Standard wings, with movies, as Fokker D-VII’s, they Reid’s Travel Air D4D, in an old Air balanced ailerons (“elephant ears”), were called "Wichita Fokkers’ . Progress (October 1969), the need installed on the fuselage, have an Travel Airs played both sides in war for me to build a model of it was upper wing span of 34 ft. 8 in., a films in the 20s and 30’s; they were overwhelming. The easy part of it lower wing span of 28 ft. 10 in., an in "Hell’s Angels” and "Dawn Pa­ was data ana blueprints, which I upper wing chord of 66 in., and a

Even though cowl and exhaust collector ring completely cover the Webra .90, the aluminum Plenty of radio access through bottom wing shroud forces cooling air around cylinder. opening. 16 MODEL BUILDER lower wing chord of 56 in. Wings, including ailerons, have 296 sq. ft. of area. The ailerons alone have an area of 27.5 sq. ft. The Standard wing with Frieze ailerons, when installed on the fuselage, has an upper wing span of 33 ft., a lower wing span of 28 ft. 10 in., an upper chord of 66 in., and a lower wing chord of 56 in. These wings, including ailerons, have 289 sq. ft. of area. The ailerons by them­ selves have 19.5 sq. ft. of area. The Speedwing wings, with Frieze aile­ rons, when installed on the fuselage, have an upper wing span of 26 ft., an upper wing chord of 64 in., and a lower wing chord of 53 in. The No Fokker-type "elephant ear" ailerons on this Speedwing version of the Travel Air. Remainder wings, including ailerons, have 151.7 is almost exactly the same. sq. ft. in the upper wing, 98.4 sq. ft. in the lower wing, and 20.4 sq. ft. in the ailerons. There were nine different wing center section struts and flying wire arrangements. The airfoil of the balanced aileron wing (“el­ ephant ear”) is a modified British Fage and Collins airfoil, which was later listed in the FAA records as the Travel Air No. 1 Airfoil. Both of the Standard wings use Travel Air No. 1 airfoils, and have the same dimen­ sions, except for a change in the bow and aileron brackets on the Frieze aileron wing. Not all of the Speedwings were 4000 series airplanes. TheSpeedwing is different in several ways. The wings are clipped (as were many Standard models for racing) and have Frieze ailerons. The deter­ mining factors between a clipped Travel Air Standard and a genuine Speedwing is that the latters airfoil is slightly thinner and flat on the Nothing makes a biplane more complete than to have all of its struts and rigging wire. Note bottom, and the chord is narrower. turnbuckles. They were small differences, but enough to make the Travel Air raciest-looking biwing machines writing and airshows, and for a plane Speedwing one of the fastest planes ever produced. The final produc­ made in 1929, that's darn good! They of her day. The Speedwing was tion version of the Travel Air 4000 belong to Nick Rezick, of Rockford, designated by the prefix D (such as was produced by Curtiss Wright as III., who does a lot of EAA air shows D4000), and tne later deluxe Speed- the D4D. (it is something to see him do his wings were designated D4D. Speed About 25 D4D’s were built, and thing in his D4D and talk with him); with the reasoning, but beauty was there are three left that are flying, Jack Strazer and his Pepsi Cola­ the result. The D4D is one of the and I mean flying! They do sky­ skywriting D4D; and Lane Leonard,

Author/Designer has all T.A . information. These ribs are for Finished and incomplete cowls .. . all-wood construction. Exhaust 12" = 12" scale version. collector ring is molded fiberglass.

NOVEMBER 1978 17 FULL SIZE PLANS AVAILABLE - SEE PAGE 144

s

Glow plug leads come to battery jack which is accessible through cowl. Gas tank filler line Top-only aileron actuated by pushrod from just clears cowl. bottom wing, per scale.

18 MODEL BUILDER a retired American Airlines captain from Los Angeles, California. Why the aerobatic boys have not learned of the outstanding performance of the D4D is hard to understand. It has the structure, power, and maneuver­ ability qualifications. It will do the entire routineof airshow maneuvers from level flight, and can gain 1000 ft. while doing three Cuban Eights. It takes very little effort to perform an entire show routine otner than a little elevator pressure. The D4D cruises at 130 mph + and makes an excellent cross country airplane. A good print of theTravel Air 2000 is put out by Peter Westburg (July 75 MB) From it, you can make just about all models just by modifying engine and wings, if you know the airframe number and year. The model here is Wendell Reid’s Travel Air D4D (CF-JLW). The Frieze-type ailerons are built to scale, with all hinges exactly like the real aircraft. I use Williams Bros, aileron hinges for the slotted ailerons, and they work out very well. For trim, the stab moves up and down 3/4 of an inch with a servo. It works superbly. The wings have a scale airfoil and are very thin. I set uptheaileron controls the same as the full-size aircraft, and it worked very well. She has a full­ swiveling tailwheel, but there are no problems in ground handling be­ cause the rudder is very effective ./ ί*ΤΛ* TRAVEL (just like the full-size ship). It also . . «Μ has shock struts and shock cords. -Z* Vaz mm r»' The plane does not wander on ι « ν . · Λ υ D-4-D AIR take-offs or landings. The only word for it is SMOOTH. A 2" = ť SCALE MODEL For power, use a .60 to .78, or even a .90.1 use the extra power to swing a Ä Ö V M / Ä i / sy · S/u. s */£>/£*C*crU>. carb will run at 9000 and get a real good idle (which, incidentally, must be real low orthe plane will keep on flying!). The fuel I use is FA1 80-20 castor oil. My model uses a Webra .90 (all the power you will ever need); with a 16 - 4-1/2, it will run at

With cowl in place, glow plug jack and fuel tank filler line are unobtrusive but accessible. Inside of cowl, showing mounting tracks and two air intake openings.

NOVEMBER 1978 19 10,700 rpm, and at full power, it will take this 10-lb. plane straight up and out of sight. I think the big prop works very well. CONSTRUCTION Construction involves fairly straightforward all-balsa and ply techniques. Start with the cowl by making two 1/16 x 1/4 ply rings. Epoxy two 4-1/4 x 12-inch pieces of 1/32 ply together so it becomes 4- 1/4 X 24 inches; then fit it around rings. Take the rings out and epoxy the seam; when it has set, put the rings back in and epoxy them into place. Glue some soft balsa blocks together for the front of the cowl (I used 1-1/2 x 3-inch blocks). Rough- cut the inside and outside dimen­ sions, epoxy it on, and finish it by sanding. Cover the cowl with 3/4 oz. glass cloth and two coats of resin, and sand it smooth. Make the cowling tracks. Glue 1/16 and 1/8 ply together, and epoxy it into the cowl. Note that the top of the inside track is on the

Neat fillet for bottom wing also houses flying wire terminals.

Underside shot shows nylon wing attachment bolts. Landing gear is 5/32 wire filled in with Stab is R/C trimmable in the air. Note scale soft balsa. hinges.

20 MODEL BUILDER center line. I closed in the front of in place and put in the cabane strut the cowl with a fiberglass exhaust subassemblies. Glue the 1/32 ply collector ring. Inside the cowl are doublers to the inside of the 1/8 seven 2-incn scale radial engine sheet sides; then glue them onto cylinders. The only cooling air that formers No. 1, 2, and 3, making sure goes in is through two openings on that it issauare; allowthegluetodry either side of tne top aummy cyl­ completely. Glue the 1/4 sq. bottom inder. An aluminum shroud is used longeron from 5B to the tailpost on the engine cylinder to make the support. Put in the 1/4 x 1/8 cross best use of the little incoming air. braces and form the sheet top decks. Make up the fuselage subassem­ Epoxy the ply cowl support tracks in blies. Start by forming the cabane place. Now fit landing gear and struts and landing gear legs, and cut solder. out all plywood parts, balsa formers, Cut out all stab, elevator, fin, and and the 1/8 sheet sides. Laminate rudder parts; glue all 1/8 x 3/8 and the cabane strut boxes from 1/16 ply 1/8 sq. strips onto the stab, elevator, and rudder. The fin is different only and 1/8 balsa. Assemble the maple motor mounts with formers No. 1,2, because the t.e. is a solid 1/4 x 3/8 basswood piece, and is butt-glued Aileron servo operates bellcrank in bottom and 3, and complete the fuel tank wing. Struts bolted in place. box. Glue the top 1/4 sq. longerons Continued on page 135

NOVEMBER 1978 21 Bob was working so hard to get his Hiperbipe ready for the World Championships that there was no time to write a column for last month's issue. Luckily, Bob's efforts paid off, as he placed second individually, and helped the U.S. team place second overall! month's deadline for this column, and the grass has gotten too long. Yes, it(i worth it! Aside from tne fact that it gives us an opportunity to travel to another country, it repre­ sents a challenge in so many ways. The creation of a new subject and the thrill of seeing it fly is difficult to By BOB UNDERV equal. The honor of representing the United States in the eyes of the A TIME FOR REFLECTIONS been totally committed?). world is something to note. But by It’s just a short time before the Years have trundled on, and the far, the biggest part of this moment World Champs, and, tousle-haired total family has become active in at of reflection comes when I look at and bearded, I sit and look at a least the administrative phase of some of the efforts that have sur­ Hiperbipe waiting for crating and a modeling; now I ponder tne merits vived the years and can be com­ trip to England. I ponder the worth of 00-90 size Phillips head screws, pared with the Hiperbipe. of it all. and spend 15-18 hours each day on a I can’t believe how crude rny early I recall 13 years ago, when the Hiperbipe. efforts actually were,and while I still summer mornings brought a trip to This particular readiness cam­ have a long way to catch up with so the window to see how windy it was paign for England has been trau­ many of the excellent builders we that day. Shortly after, a lone figure matic. Problems with paint, a hos­ have today, I find pride in the skills would appear at the field, often pital stay, and myriad other im­ I’ve been able to develop. amid mist and fog, to fly the “ White ponderables have made the last few That is the essence of the scale Cloud” until it was in need of repair. weeks an ulcer-producing session. builder. His early efforts, perhaps The following summer, someone Then there is that 11.02 lb. limit in crude by some standards, are a hooked me on a contest, and I FAI (recently changed) that gives source or pride to him. As he learns found that a Senior Falcon could some of us more inept builders a fit. and progresses, he can still retain hack it in Class III competition on a Is it all worth it? The hours, the this pride in what he has created. local level. I couldn’t let the scale dollars, the everything? Surely, my Yes, it’s worth it; the late hours nuts have all the fun, so I built a parents and many of my friends who and frustration; the tribulation over Stafford Chipmunk and was totally visited during tne “getting ready CG, weight limits, and even whether committed (or is that should have time” tend to doubt it. I missed last or not it will fly; the consternation of how to provide linkage to two wings so it can’t be seen. To stand and feed power to the multi-striped beauty and see it run unerringly down tne asphalt, tail lift, and gradually have the craft become airborne makes it all worth it. To watch the photographers gather to snap pictures and ask you myriads of questions about it makes it all worthwhile. To create, amid a carbon-copy, stamped-out, mass-produced world, a small bit of one's self makes it all worth it. The Hiperbipe goes to England to seek its fortune, much the way the classic story of Dick Wittington and 22 MODEL BUILDER Close-ups of the cabin and nose on the Hiperbipe. The wild cloth pattern on the door panels was reproduced photographically. Hopefully, Bob will never break the prop; if he does, all he has to do to get the spinner off is remove ten 0-80 screws! his cat relates the adventure. It is worth it, regardless of the outcome. SCALE CONTEST SCENE An earlier report gave general facts concerning the all-scale con­ test featured at the first half of the Mint Julep meet in Kentucky. The success of this event came from the relaxed approach made possible by not having to squeeze in two types of events, and the efficiency of the workers. Monty and Pat Groves provided information on the success of the WW-II Scramble in California in an earlier issue of Model Builder. In July, we held an all-scale event in St. Louis, featuring Free Flight Rubber and Peanut, Control Line Sport Scale, and R/C Sport Scale in two classes, novice and expert. The event was very much a success artistically and financially, but in actuality, one wonders where every­ MB's Chuck Blackburn did a beautiful job on this Brown Racer, built from a Bridi kit. Model body was! weighs around 9 lbs., but Chuck says the Enya 60 X F makes it seem more like a fast seven! Six R/C entries appeared, three in each class. The number of static spectator turnout, especially by the illustrate a few other departures entries swelled the number some, modeling public. People who rarely from the normal contest. Each parti­ but a combined entry number of 23 show up at a contest appeared to see cipant and worker received a 4 x 6 represented everybody. An inter­ the scale models. engraved plaque, and the entry fee esting aspect was the very great At the risk of boring you, let me was by donation only. The average

Cathy Underwood, Bob's daughter and 1 /3 of Bob's super pit crew. Part of the lineup of models for static judging at the St. Louis all­ paints Hiperbipe's box for the trip to England. scale meet held on July 2. Photo by Cathy Underwood.

NOVEMBER 1978 23 people who suggested to me a year ago that an all-scale contest would be a great idea? All-scale contests and fly-ins are here, and it appears that they can survive on their own. They have a natural appeal, to both spectator and contestant. Adjustments need to be made to the contest procedure (as compared to pattern or pattern-scale affairs) since the static judging needs to be done first. By making certain that the judges work quickly, and allow­ ing flying to begin before all the models are judged, it can be worked. Consider whether your group can handle such an event next year. It Michal Sip, of the German "Flug-Modell" model magazine, sent us photos taken at the annual works well, and is most rewarding. Harsewinkel Flying Circus. Shown here are mammoth Tiger Moth and Nieuport 17 models. WHAT ARE YOU LOOKING FOR? Scale modelers have been rec­ donation was $3.86 per entry, with a were judged by one panel of two high of $10.00. ognized as innovators in using un­ judges. The Sport Scale models were likely items to simulate needed The cost of the trophies and judged from a true distance of ten plaques was $339, and the portable parts. feet, by using two lines and not Let me pass on some discoveries facilities were $70. The total of a allowing any portion of the model $1.50 per car donation for non-AM A made in tne preparation of recent to intrude into the space. A steward models. Many (or all) of these are members at the gate, the refresh­ was on hand to rotate the model as ments, and the entries allowed us to probably on your list, but then needed. The process seemed to again, maybe not. realize a profit of $190.92, which was work well. sent to the Scale Team Fund. A) Landing gear folding struts are Thus, everything seemed a suc­ easily faked with small black rubber All models . . . F/F, U/C, R/C .. . cess, except were were all those tubing. When the gear is down, it looks like a metal strut, but when « retracted (or retracting), it folds out of your way. B) Carpet for cockpits can be formed from thin (1/8-inch thick) art and craft foam. It weighs virtually nothing, and comes in large sheets. Many colors are available, but if you neea to match it closer, try a vinyl spray that comes in cans. C) Head liners can be made from small felt squares sold in craft stores. D) While in the craft section, look at the myriad types of fasteners, beads, and stuff used for making jewelry. I found some excellent clamps, clasps, chain links, etc., in that section. E) Structo plastic parts have angles, strips, and tubes that make great window framing, panels, and ends for knobs on the instrument Hermann Sakbrook's J-3 Cub was one of several big models that showed up at Harsewinkel. panel. Model spans 11 ft., 9 in., and is powered by a Quadra. F) It you are simulating seats and upholstery, you can find a type of leather material sold in yardage stores that will work well. It is quite thick, but the backing and facing can be easily separated by peeling. The leather film is ultra-thin, light, and can be easily glued to any surface with a glue like RC-56. It retains the grain and mottled effect of leather. It costs about $8.00 a yard, but is 54 inches wide, and 1/8 yard will go forever. G) Spring-loaded door latches can be difficult if you can’t find very small springs. Look at the Du-Bro This monster B-17 (with tricycle gear?) was another of the performers at Harsewinkel. Unfor­ servo override hardware. tunately, it was a victim of aileron flutter, crashed on top of a motor home. Continued on page 100 24 MODEL BUILDER INSTRUCTOR Conducted by DAVE BROWN 8534 Huddleston Dr. Cincinnati, OH 45236

• Caution!! This column will self- and uniciue, but very effective. They competitive career could very well destruct if I don’t start getting some actually held a countdown over the have ended right there. Please, for letters from our readers pretty P.A. system, starting one hour be­ safety’s sake, buy good, shatter­ quickly. Seriously. I haven’t re­ fore the scheduled first flight. Boy, proof glasses and always wear them ceived a single letter with questions was this effective in getting every­ when startingthe engine, as without in it for this column during the last one ready on time. eyes, you’ll miss a lot more than month, and although my flying The following weekend was spent R/C flying. buddies would probably not believe in San Luis, Mexico, and again I Tuned pipes seem to be the sub­ it. I'm running out of B.S. The col­ learned a few tips which I can pass ject of a large amount of questions umn this month is being written in on. First, if you fly in very dusty asked of me at various contests, so the motorhome while traveling conditions, look into the sealed I’ll cover the subject this month. through Mississippi, headingforthe electric retracts, such as Kraft or There have been many columns and Nats. Sally will tell the story of the Giezendanner, or seal your present articles written on the theory of the Nats pattern event in next month’s mechanical or pneumatic units to tuned pipe, so I won’t get deep into Model Builder, as fearless leader keep the dust out, as it will get.into that here, but I think a simple (Bill Northrop) put through a frantic everything and possibly jam the explanation of what they do is call yesterday. landing gear. A second, and very necessary. First, when the exhaust During the last month I’ve taken important tip comes from an ac­ port opens, the pipe creates a neg­ in contests in Allentown. Pennsylva­ cident I had while down there. ative pressure at the exhaust port nia; San Luis,Mexico; Warren,Ohio; While starting and adjusting my which sucks out the spend gases and Lancaster, Ohio. The meet in engine, the prop kicked up a small more auickly. Secondly, just before Allentown was a first-time contest, stone which dead-centered the the exhaust port closes, the pipe and will serve as an example of how right lens of my sunglasses. The lens creates a positive pressure which it should be done from now on. cracked and had a small chip out compresses the incoming fuel/air Among the things which made this where the stone hit it, but it didn’t mixture into the cylinder, giving you contest so successful was the fact shatter, so my right eye was saved. a supercharging effect. Now, as you that it started on time; their method Had I been wearing cheap sun­ can imagine from this description of of getting started on time is simple glasses or no glasses at all, my how they work, the timing (when it sucks/when it blows) becomes criti­ cal. This is adjusted by tuning the length of the pipe, and the proper length is dependent on rpm. Tne muffled tuned pipe, which has become popular in tne last few years, is more broad-ranged than the out-and-out speed pipes, and will almost always help the per­ formance of any engine, when adjusted (tuned) properly. The old myth that only a special engine will benefit from a tuned pipe simply is not true. There are, how­ ever, ways to tailor an engine to tuned pipe performance by chang­ ing the exhaust timing. This usually involves raising the exhaust port about .025-,040 on a .60 engine, which increases the exhaust dur­ ation from approximately 155° to around 165°. I personally do not recommend this for anyone, unless they need the absolute most power available, as it makes everything Continued on page 107

NOVEMBER 1978 25 By TOM and ANDREW S T A R K . . . A pictorial review of scale activity in nearly all categories, at the 1978 AMA Nats, by top competitors. R/C SPORT SCALE entered and did very well in the static A fair-sized numberof entrieswith scoring; however, the biplane flight a good variety of models character­ scores just couldn’t match the ized Sport Scale. The models ranged pattern-like flying of the modern from a huge twin ducted fan Me-262 fighter aircraft. Tne biplanes were jet fighter to .051-powered airplanes. further hampered by the lack of The first round saw some fine options such as bomb drops, re­ flying and a good share of engine tracting landing gear, and flaps. problems, perhaps due to the high Perhaps some rule changes are in temperature and humidity. Art order. Johnson’s F-82, Bob Violett’s A-4, Ralph White placed first with his and McCallie’sFW-190Dwerestand- Fliteglas P-51, followed in order by Andrew and Tom Stark really cleaned up in Scale. Andrew won two 2nd's, and Tom won out fliers. Violett’s A-4. Johnson’s F-82, a 1st, a 2nd (in R/C!), two 3rd’s, and a 4th. A large number of biplanes were McCallie’s FW-190D, and Czikk’s P- Good show!

Mike Fedor launches his Outdoor Peanut­ Claude McCullough placed third in Precision R/C Scale with his Shinn. Only four entries in winning .010-powered (!) B-70 Valkyrie. Precision Scale this year. 26 MODEL BUILDER f

Allen Schnazle's Chambermaid won 2nd in Brunner Winkle Bird by Tom Stark won 2nd place in R/C Precision Scale. Model is powered by Outdoor Rubber Scale. Also flew in Indoor. a Fox .36, color scheme is cream and red.

Larry Kruse ROG's his C02-powered F/F Scale Morane Saulnier. Joe Scuro releasing his red-and-yellow Curtiss Robin for an official Placed 5th. flight in F/F Scale.

Sport Scale Savoia Marchetti SM 79, by Bud Atkinson. Reported to Duke Horn's F/F Kinner Sportster, built from a Flyline kit. Model be a smooth, fast flier. is powered by a Mills .045 diesel.

A happy Tom Czikk and his scratch-built P-47, with which he won Al Krqtzand his 1/6-scale Pitcairn Mailwing, built from Sid Morgan 5th in Sport Scale. Drops fuel tanks and bombs. plans. Al's model had the highest static score in Sport Scale.

NOVEMBER 1978 27 Tom Stark’s F/F Scale winning Fokker T-2, Scale judges (I to r) Jim Scroggins, Dale Arvin, and John Preston give Ron Roberti's Curtiss held by son Andrew. Astro 020 electric motor. Robin the onceover. Ron's model had the highest static score, placed 2nd overall.

Andrew Stark and Guy Larsen try an unofficial formation takeoff Dennis Grady did an excellent job on this Douglas A-4E, powered with a Hellcat and Heinkel He 100. by a ducted fan. Flew in Sport Scale.

Hurst Bowers holds while Don Srull packs the turns into his 2nd place Piper Vagabond.

Mike Gretz, well-known C/L flier, flew this Gail and Ron Roberti with Ron's beautiful Zlin in R/C Sport Scale. Fine flier. blue-and-silver Flyline Curtiss Robin.

Rolfe Gregory waits for good air before Dr. John Martin explains some of the funnier Don Downing's 1/2A F-4 Phantom, soon to launching his 5th place Flyline Heinkel 113. aspects of his W EL 10 to Chuck Marros. be a kit by Model Merchant. Has retracts.

28 MODEL BUILDER Guy Larsen flew his neat little Nieuport 17 Andrew Stark holds dad Tom's He 119A. One Nick Decarlis launching his Found 100 for an to 2nd place in (senior) F/F Scale. of several low-wingers at the Nats. official in Peanut. Nick won four scale events!

Another low-winger! This time it's Don Srull's Swiss Schlepp C-3605 Don Srull again, with his Dornier Do-23. A very realistic flier, but a target tug. Won first in Outdoor Rubber Scale. sick engine hampered its flights at the Nats. 47. Overall, the quality of the models flying. Dave Platt won first, followed by and the flying were excellent. By round two, Dave Platt had Stark, McCullough, and Tomeo. The R/C PRECISION SCALE cured his engine problem and put in small turnout can partially be ex­ Only four models competed in an excellent flignt, putting him in plained by three of our top scale precision scale. Three rounds were first place with his Dauntless. Tom fliers being in England for the World flown over a three-day period. In the Stark was also able to make a com­ Championship Scale competition. first round, Dave Platt, Tom Stark, plete flight with his little Brunner FREE FLIGHT GAS SCALE and Claude McCullough got air­ Winkle Bird. Tomeo’s FW-190 still Unlike so many prior years, F/F borne, but all three had engine had engine problems, but it did get Gas Scale was blessed with excellent problems which terminated their airborne briefly. Round three saw weather. In Senior, Nick Decarlis, of flights. Vito Tomeo had engine flights by Stark and Claude McCul­ Florida, continued his winning ways problems which kept him from lough’s Shinn. When it was all over, by placing first, followed by Guy

Eric Waterman was the only junior in R/C Sport Scale. Here he gets Duke Horn running up the Mills diesel in his Flyline Kinner Sport- an assist from his dad in assembling his fine Stinson SR-5. ster. Quite a few Flyline models were flown at this year's Nats.

NOVEMBER 1978 29 Cindy Brooks and Phil Hubert, with Phil's 3- Vito Tomeo placed 4th in Precision R/C Scale with his big, beautiful FW-190. Unfortunately, year-old Acrosport. He learned to fly with it! Vito had engine problems which kept him from getting a higher flight score.

Larry Kruse flew this neat little Monoprep in John Singer gets a good launch on his Kinner Outdoor Rubber Scale, placed 4th. Sportster in F/F Scale. Larsen. Tom Stark's electric powered of the models being color doped. Fokker T-2 won Open, largely on Typical of this trend were three of the strength of a very realistic take­ Jerry Murphy's Cessna 170 recorded the high the Don Srull-designed Heinkel He- off on nis second flight. Ron est flight score in F/F Scale, 3rd overall. 100's (or "He-113'j. Robertti’s high scale point Curtiss First in Open went to Dan Domina Robin placed second, followed by INDOOR SCALE with a Piper Cub, which exceeded Jerry Murphy’s Cessna 170, whicn The site was the Burton Coliseum, the maximum 90-second flight time. earned the highest flight points. which has about a 100-foot ceiling Ffe was followed by Don Srull with a California’s Bill Stroman placed and a dirt floor. Although many large Piper Vagabond, which was fourth with a pretty C02-powered fliers were a bit apprehensive about color doped and very realistic. Char­ Taube, followed by Larry Kruse’s the dirt, it presented no problems lie Sot ich came in third with his Volks- C02-powered Morane Saulnier. for takeoffs . .. you just had to be plane, which also placed second Out of the first five places in Open, careful not to drop a lubed motor! in Peanut scale. Clarence Mather’s only two were powered by internal The trend this year was toward low PT-19 was fourth, followed closely combustion engines! wings and more realism, with many Continued on page 108

Not an official entry, Jim Gerwitz displayed his incredible twin Mike Fedor caused quite an uproar when he won Outdoor Peanut ducted-fan F-15, turned everyone green with envy. with a gas-powered model. Rules changes are likely. 30 MODEL BUILDER that it has been done, reflection to provide the necessities for the shows that the greatest effort was residents of the county to engage in finding the proper procedure and ANY recreational activity which the understanding the government and citizens so desire. Their job is to take what their criterion is when it comes care of us, just as a hospital or any to supplying any facility. I believe other county department does. The most modelers have a chip on their standard that the Commissioner will shoulder when they approach the use in determining whether the R/C government, figuring from past county can proceed is how many FORUM with experience that everyone is against people are involved, and even more them and that they will have to fight so, how much spectator interest with the powers that be to obtain there is in the activity. Obviously, Hal deBolt what they want. Contrary to this, we thousands of people are not in­ P.O. Box 147 were happily surprised when we volved in baseball, so it is the spec­ Buffalo, N.Y. 14225 finally talked to the "right” people. tator interest that the county sees. The procedure that works is as Of further interest was the Com­ Mail in your questions or concerns. follows: missioner’s statement that any particular problems involved with • Lastmonth.wetalkedaboutflying 1. First, unless you live in a very large metropolitan area, find out an activity nave to have a solution. In fields and how great it is to have one our case, an open area is needed and that is government sponsored and who is your County Commissioner or Recreation. Except in very large we do create noise. It becomes the maintained. I hope we made the county’s job to find us a place where cities and/or towns, only the county point that obtaining such a facility is we can operate. In our case, the not all that hard to do. Also, tnat will have a Department of Recrea­ Commissioner mentioned having a once established, it removes many tion with great enough resources for noise problem when they provided the job. Also, the county is con­ of the inconveniences of modeling a gunnery range; as you can imagine, and allows us to go “ first class”. I cerned with ALL residents, whereas they did find a place fortheshooters. want to finish up this subject this a city within a county is only inter­ ested in city residents. Of further interest is the know­ month, and hopefully reply to a few ledge that once a facility is estab­ of the nice letters you readers have Make an appointment with the Commissioner for several members lished for a particular purpose, it is been sending in. So far, they have there to stay. All of us have had a big created several points of interest, of your club to sit down with him ana explain what R/C is all about. problem with a simple complaint to which I am sure will answer many of the authorities about noise created your questions. Take along one model and trans­ mitter, ana use the time to simply at a private field. Quite often, just I do not believe that the Niagara one complainer is enough to close Frontier area of New York is much talk R/C with him. Everyone should get into the act, so that he sees the the field. Not so with a government different from the rest of the coun­ facility. Remember, thegovernment try, as far as R /C ’ers and the govern­ enthusiasm. Do not press him for anything at this time; just leave him is the people; it is the people of the ment is concerned. Our experience county who are providing the facil­ here seems to parallel other areas, with an understanding of R/C and that flying fields are a problem for ity. As such, it becomes the com- such as Los Angeles, St. Louis, plainers against the rest of the Chicago, and New York City. I know modelers. Tell him that you would like to come back in the near future population. Naturally, in locating a that there are many others, and facility, the county will give con­ Rough River, Kentucky, would be and show him how modeling can be an asset to the county. sideration to all problems involved, an example. As an R/C'er it sure is so that the location will be the most wonderful to live in these areas and If your experience is similar to ours, you will find that the Com ­ suitable possible. Once established, be able to enjoy these government- that is where R/C will be flown in provided and maintained facilities! missioner has told you that the work In western New York, we have 3 of the Department of Recreation is Continued on page 130 adjacent counties that have pro­ vided facilities for a number of years now. The County of Erie provides 2, Niagara 2, and Monroe has one to date. All of them are excellent. Niagara probably has the finest flying field in the world, with a golf green-type grass runway measuring 500 X 1200feet, right in the middle of open rural land! As a side note to those interested, the United Pylon Racing Circuit's 1978 Championship will be held on this field, at Lock- port, N.Y. The point of all this is that the question most asked of me by modelers who still have many of the usual field problems is “how can we have one, too?”. In most cases, the answer is positive; you can have one if you will only take the time to do the necessary things to obtain it. These fields did not come to the ------ΛΑΜ Niagara Frontier without effort on the modelers’ part. Ffowever, now "When we gave you permission to use the park field, it didn't include fishing privileges!"

NOVEMBER 1978 31 MODEL / ν ® ·δ ν «4fS»KäV BUILDER PETER WESTBURG VISITS... <*

• Anyone who is at all interested in Scale R/C Modeler. Several readers time in 1920 or 21. At the time, he scale models is no doubt familiar have mentioned that they would was living with his parents and six with the name "Peter Westburg". For like us to do a short biography on brothers and sisters in a big, ten- several years now, Pete has been Pete, using his airplane experiences room house on a small farm in producing some of the finest detail as milestones. It was just too good Masonville, Michigan, where he was aircraft drawings available any­ an idea to pass up. So, if you would born. He was playing in the yard where. In addition to Model Builder, like to know more about the “King when he heard an automobile en­ Pete’s drawings have appeared in of the Drafting Board”, read on. gine, which wasn’t too unusual, such magazines as Air Classics and Pete saw his first airplane some- except this time there weren’t any cars around. Then he saw this two­ winged thing creeping across the sky. Pete believes it was a Jenny. Pete’s next experience with an airplane was three or four years later, in Michigan City, Indiana, where his family moved in 1923. He and some other kids were playing in the dirt street in front of the house when three or four airplanes (prob­ ably Navy fighters) roared over at treetop level. But the first airplane Pete ever got close to was on a freezing day in January, 1929. He had heard that an airplane had crashed on the ice on Pete considers his best model to be this control-line ship, designed and built in 1942. Model is powered by what looks like a Bunch. Realistic appearance is typical of Pete's designs. Lake Michigan. He went out there the next day, walking across about a mile of ice. By the time Pete arrived, the engine was under the ice and the tail was sticking up. The wings had been pretty well stripped by souvenir collectors. The airplane was a Liberty-powered DeHavilland DH-4. Pete managed to get the registration number off one side of the fin and a piece of a fin rib. The story in the local paper said the pilot had landed in a snowstorm, thinking the frozen lake was a smooth field. Three boys met him and took him to the local police station. The pilot said he didn’t have Another view of Pete's 1942 control-liner. Note that it's set up to fly clockwise . . . not uncom­ any money, and had to get to mon on U/C models in those days. Chicago. Tne police gave him ten 32 MODEL BUILDER bucks and put him on the South Shore to Chicago. It was the last they saw of him. Pete says the DH-4 eventually sank, but not before the police went back and looked it over. And what did they find in the front cockpit? Ten gunnysacks of Canadian booze! The pilot was running it from Canada to Chicago. The newspaper said the police tried to track nim down, but he had given them a phony name and address. But that's not the end of the story. Pete relates that, twenty years later, two of the boys who had found the pilot were attending an automotive engineers’ convention in Detroit. They sat at a dinner table with some strangers, and when they men­ tioned they were from Michigan City, one of thestrangěrssaid he had Pete Westburg hangs on while his buddy, Harold Ford, tunes the Baby Cyclone in their WF-2A once landed on the ice near there in gas model, built in 1936. The WF prefix probably stands for Westburg/Ford. a snowstorm, after losing his way to Chicago. He turned out to be none other than Bert Acosta, the famous pilot who flew the Atlantic with Admiral Byrd! So, for a while, Pete had a piece of fin rib and the registration number from Bert Acosta s DH-4. Unfortu­ nately, Pete doesn’t have them anymore. You see, he hid them in a hole in the basement ceiling, so no one would find them. His father did, however, and used them to start a fire in the furnace one cold morning! One of Pete's best-known designs was the WF-3, which was published in the July 1938 issue of Pete saw a lot of airplanes in the M.A.N. under the corny title “ How to Build a Pursuit Type Gas Model". early and mid-thirties. He never missed a chance to see the Indiana Air Tour, sponsored every year by the Lineo Oil Company. Anywhere from 50 to 100 planes took part in it, stopping at all the bigger cities in Indiana. He remembers seeing Jimmy Doolittle in his red-and- yellow Shell Oil Lockheed Vega, and a lot of Wacos and Stinsons and just about every private and commercial airplane flying at the time. One of Pete’s most vivid recollections was seeing Italo Balbo’s Savoia Mar- chettis. They flew from Italy to the 1933 Chicago World’s Fair, and on The WF-3 had a 65-inch span and was powered by a Baby Cyclone. Flew well despite a wing the last leg from Cleveland to loading of 16 oz./sq. ft. This is the same model that lost a wing in flight . . . see text. Continued on page 138

Pete's WF-4 was much racier-tooking than his previous models. Tri- The WF-4 was a rather small model for its Brown Jr. engine, must cycle gear is hardly ever seen on a free flight, even today. have gone like a bomb. Model was built in 1938.

NOVEMBER 1978 33 available! It is necessary that the blade position be adjustable, that the base be flat and firm, and that the blade can hold an edge. About ten years ago, there were several really nice planes that used razor blades .. . wow! Cheap, easy, and no sharpening worries. Nowadays, you can still get razor planes, but you can't get adequate blades. The great shift from high-carbon to stainless blades did wondrous things for shaving, but left us modelers up the creek. Stainless absolutely won t hold an edge in modeling use. There have been a couple of imported planes that came with really good razor blades, but the importers don’t import the blades separately! When you go through the four or so blades that come with the plane,you are stuck with a paper­ weight. If anyone knows where really hard double-edge blades can be found, let me know, and I'll pass it along. Right now, I can recommend only Dave Felsenthal with two of Bob Parks' 1/2A screamers, an F-15 (left) and MIG 25. Both use one small plane, the “ Stanley” (also Tee Dee .M il's with bladder tanks. Roll rate must be something else! available through Sears as a ‘^Crafts- man”) hobby plane. With this unit, you will have to learn to sharpen blades, but you need that for the next item anyway. Third useful tool is a really super­ 1 / 2 ·. a s e m sharp carving knife. Oddly enough, the best ones are made from really By LARRY RENGER cheap kitchen knives. I got one called “Old Forge” brand for under $3; it can be sharpened to a shaving BEGINNER'S WORKBENCH box to match a large razor saw. When you want to splice spars or edge, and will hold that edge Tools are the key to your success through quite a bit of wood cutting. in modeling. Although you can do a trim a leading or trailing edge, the razor saw gives you a finish cut. I The clue here is to first make sure creditable Building job with practi­ the knife is not stainless. It should be cally nothing, the correct tool will have found a problem with the X- acto saws, in that the angle between high-carbon steel. Second, pick one always complete the task quicker with a fairly straight cutting edge; it and better. Fortunately, good tools the handle and the saw edge is too steep. Some people reverse the will save much work as you re-snape need not be expensive. There are the knife for your needs. several items which are indispens­ blade to make the saw cut on the able, each of which cost in the two draw stroke. I prefer to simply bend Most of these knives have a large or three-dollar range. the handle down until it is nearly curve at the end. I cut mine to about First and very important is the parallel to the cutting edge. 5 inches long with a grinder. The cut razor saw. There are several makes, The second important tool is the was slightly back from perpendicular and they all seem to function. A modeling plane. Unfortunately, to the edge, so I can carve in close to companion item is a model miter there are some really bad ones edges, if needed. Once the knife is cut to length, all you have to do is sharpen it. First, throw away any and all of those wretched black sharpening stones. They are OK for an axe or machete, but they are hopeless for model work. Buy genuine hard Arkansas stones .. . one coarse, and one medium. Don’t bother getting the fine white stone, it doesn't seem necessary. Also, don’t use any oil while sharpening! Clean the stones occasionally with an old toothbrush and soap. To get an edge on a knife, you have to sharpen it in two stages. First is rough shaping. Take the knife, and, holding it at a low (10°) angle The Bridi T-10, for .09 to .10-size engines. Model can be built either as a high or low wing (low from the stone, work on just one wing version was pictured in the August 1978 MB). Either version makes an excellent trainer. side, until you have raised a burr

34 MODEL BUILDER over the entire length of the cutting edge. The burr is felt by running your finger off the edge on the un­ worked side. Usually, the burr is quite visible. You can work on the edge with any type of motion . . . back-and-fortn scrub, rotary swirl, etc. The idea is to remove metal to get the basic angle to the edge. When the burr extends over the entire cutting edge, flip the knife over and work the second side just as you did the first. When the knife has a burr, as felt from the first side, it is shaped and ready to sharpen. The sharpening is done much more gently and carefully than the shap­ ing. Hereiswheretheclassic“stroke, switch sides, stroke” is used. Alter­ nately stroke each side of the blade over the stone. Stroke direction is as if you were cutting into the stone. Use a blade angle of 15° to 20° between the knife and stone. I usually continue this sharpening stroke until about 1/100 inch of high olish is visible all the way down Another oi Bob Parks' original designs is this Tee Dee .020-powered pattern model. Weighs only oth sides of the cutting edge. At 8 ounces. Bob says it flies smoother than most .049 ships. this point, you should be able to 35mm size, so they are capable of added an extra brace in the center of shave hair off your arm or slice a great enlargement (I have made the wing. The brace was huge and newspaper page neatly. very nice 16 x 20-inch prints!). There ended abruptly . . . Guess where the The final tool which is indispen­ is a wide variety of cameras in this wing folded in a long dive! Hey sable is a building board. I use a gang, it’s not enough to strengthen piece of 3/4-incn plywood with class. The one shown is a Yashica GSN. I use an Olympus 35RC. Other the center of a wing, you must Cellotex (ceiling tile) contact ce­ carefully taper off that strength as mented to it. By careful selection of excellent brands are Minolta, Canon, Konica, Fujica, and Rollei. you move outward. If you flex your the plywood, you can get a piece wings from the tips, you should see that is flat and true. Any warps in the Most of the cameras are manually operated, but include an exposure an even amount of bend all the way board will show up in both wings, along the wing. Sharp bends at one and the warps will reinforce them­ meter. Several, such as my Olympus, or more spots are a sure sign of selves, not cancel out! I have found have completely automatic expo­ sure settings. Once you pre-set the trouble! You can actually weaken a that an 18 x 48-inch board is plenty wing by adding strength improperly. large . .. even a 12-inch width is number on the film into the camera, adequate. the camera will then give you a It sure is spectacular (expensive, whole role of decently-exposed too) to see an airplane explode in By popular (1 person) request, I’m mid-air. Looked like someone got it going to continue devoting occa­ photos. Several of the cameras automatically adjust for flash inten­ with ashotgun.TherewasMonokote sional space to the art of photog­ still floating down after I ran the 200 raphy. Tne camera shown this month sity and distance. . . Konica even has one with a built-in electronic flash. yards to the wreck: Guess I'll build is a “ Rangefinder 35”. Again, this is my own models from now on. an inexpensive way to take really Prices run from $50 to $150. Pick an good photographs. By eliminating amount you can spend, then see Bob Parks is a member of my old expensive features like through- your dealer for the best buy. college model club, the MIT Tech the-lens viewing and interchange­ I clobbered an airplane over the Model Aircrafters. There are about able lenses, you get low cost without weekend. It wasone built by a friend 25 members, mostly undergradu- sacrificing quality. Negatives are (no names please!), ana he had Continued on page 105

Dave Barfield sent in this photo of some of his old 1/2A's. From In response to overwhelming reader response, Larry is continuing I to r, a Jim Walker .065, Atwood Wasp .049, and Spitzy .045. his review of cameras. Shown above is the Yashica GSN.

NOVEMBER 1978 35 Bill Preis won 1st in Form I at the 1978 Fort Wayne Air Races, Rex Knepper gets his $250 from Jim Gager for his Q-M win at shown here collecting his $250 prize money from Jim Gager. Fort Wayne. Rex's wife. Joan, is there to help carry it home! PYLON * GO FAST and By JIM GAGER Turn Left/ PHOTOS BY AUTHOR UNLESS NOTED

BANG THE DRUM SLOWLY. . . also become discouraged with poor year; now we’re averaging a contest The death march rolls on. Reading turnouts. Wasting a day’s effort, and every three or four weeks), or at the various newsletters we receive the expense of traveling anywhere least every two weeks. Shooting in as a result of this column, and the from 200 to 400 miles to make a the dark as to what could be tried conversations we hear while attend­ contest, often makes the contestant leads me to suggest that a racing ing various races, would lead a think twice before going to the association should try to create a person to believe that pylon racing contest scheduled for the next major race on an annual basis in a is on its deathbed ana will soon week, let alone return to one where iven geographic area, say a four- expire. Clubs are crying because all turnout has already proven to be undred-mile radius of a good the efforts involved in putting on a poor. contest site. race go virtually wasted when the Racing should be enough in itself Go for major valuable prizes to number of contestants reaches a to draw contestants, and each con­ draw the racers from within that grand total of ten or twelve. With test should be larger than the one radius, or an even greater radius. that kind of turnout, the workers before, with the excitement creat­ Although not expected, it's nice to outnumber the contestants, and at ing the desire within “Joe Average have a chance to reimburse some of the average entry fee of $8-$10, the Racer” to be a part of the thrill of your expenses. hosting club will probably lose racing. Perhaps we’ve gotten off the Go for tying your event into some money paying for the trophies it track of how to increase our num­ other area attractions or doings, and purchased. The problem feeds upon bers, though. The seemingly preva­ use their nickel for free publicity. itself, for not only is the hosting club lent theory has been to have races Push the involved club workers to discouraged from wanting to hold on a weekly basis (that’s the way it’s go all-out to make a super contest. another race, but the contestants been around the Mid-west until this The non-workers can be expected to sell raffle tickets to help finance the prizes and make the club a profit. Social service organizations, such as the Kiwanis or Lions clubs, will go along 100% to help your contest be a profitable success, if you’re willing to split the profits with them for charitable causes; and let me tell you . . . these groups are really enthusiastic and gung-ho. They can be a real asset to you. They also have experience wnere you may not. Okay, you’re sitting on the throne in your private library (you can tell a real modeler by the Dooks he keeps on the tank snelf for diversion), saying to yourself, “Self. . . Gager’s blowing smoke again!” Well, maybe not this time. I remember reading Chief lap counter, Phil Basile, with central communications system and digital readout timing about the race they put on at the system, at the Fort Wayne races. Timing system was designed and built by Allen Booth. PGRC meet in Maryland. They get a 36 MODEL BUILDER Jim Gager waits patiently, while three Formula I fliers get their ships They're off! Well, almost. Caller on the right should have let go by ready to go at the Fort Wayne races. now. good turnout of F -I’s, running in the not the total solution to what ap­ forty to fifty-contestant range, the pears to be a growing problem that attraction being valuableand plenti­ could ultimately lead to the demise ful prizes. The Tangerine race in or reduced quality of pylon racing, Florida always draws a large con­ but it has its merits. tingent of racers, who are attracted MORE HELP FOR YOU, AND by the warm weather in the middle MORE BRAGGING FOR ME. . . of winter; the Fort Wayne Air Races The club I belong to, the Fort drew the largest turnout in the Wayne Flying Circuits, doesn’t air its Mid-west, the attraction being club finances in public, and I have money; the Rough River Q-M Nats no intention of doingso now. But,at t always draws a Targe turnout, the the pylon race we put on this year, attraction being the super site and we gave away $1000 in cash, with no the cash prizes and silver trophies; outside sponsorship whatsoever I Bakersfield always draws a great (entry fees don’t cover the prize turnout, due to thesuperbcompeti­ money, either). We paid for equip­ I tion that shows up to do battle. ment purchased only for use in There are many other contests that racing, which is therefore charged fall into the category of a “ good” as an expense of holding the race, race, for one reason or another. rather than against the club’s gen­ With a calendar of “good” races, eral funds, as this is not specifically a one a month , it seems that the chore racing organization. Contributions of an even longer traveling distance, were made to the Township Park, or having to make it an overnight whose property we use, and the Fort trip, would easily be cancelled by Wayne Three Rivers Festival, whose the rewards of winning a major prize advertising nickel we use and whose or competing with a large turnout of overall activities help us draw a Eagle-eyed Kieth Golembiewski holding down competitive racers. The longer crowd of thousands of spectators, the No. 3 pylon at Fort Wayne. period of inactive time between who in turn buy our raffle tickets time and effort into one big project races would also allow for the build­ and concession food. Even after all each year to help keep the club ing of new aircraft or repairs of the of the expenditures, we still made financed and pay for improvements, slightly bent ones. enough money to make it worth rather than several smaller and less The above type program may cut working to solve the specific prob­ profitable ones. Besides the benefit down on the number of races you lems magnified by a “money race” to a club’s treasury and pride, it get to attend, but do you really and non-racing help. In our case, means that each year the contestant enjoy competing as one of only ten the club members are finding it a can reasonably, expect more bags to competitors at so many races? It is more attractive idea to put their Continued on page 112

One of the more peaceful moments during the two-day Fort Wayne Steve Metzger (left) must be a good sport if he can still smile after meet. Quarter-scale Little Toni in background. doing this to his racer. Dave Sears helps with the display.

NOVEMBER 1978 37 Formula I winner Ron Schorr, of N. Hollywood, Ca., with wife and Bob Reuther, of Nashville, Tennessee, was the big winner in Quarter daughter. Ron's Polecat was tops in appearance points. Midget, with a total of 37 out of a possible 40 points.

* PYLON AT By JOE KLAUSE THE PHOTOS BY AUTHOR UNLESS NOTED ■ f • Many people, hobbyists or not, of a possible 40 points. Breaking it NATStheir scores: like to watch pylon racing. Let's face down, he had one third place, one OPEN it; it’s exciting for pilots, pit crews, second, and eight firsts! By any 1. Bob Reuther...... 37 and spectators. If you’re a real standard, that was a superb perfor­ 2. George Parks...... 35 aficionado, then there’s only one mance. Second place went to 3. Thomas Baker...... 34 place you should have been during George Parks ... for the third year in 4. Brian Richmond...... 32 the first week of August . . . at the a row! Tom Baker was third; only 5. Thomas Christopher...... 31 Nats. There were three days of one point behind George. Here are 6. Dennis Sumner ...... 301/2 Quarter Midget racing, followed by the top standings, together with 7. Russell Eavenson...... 29 another three of Formula One. 8. William Adams...... 261/2 That’s hard to beat, especially since 9. Bill Hager...... 25 many of the top fliers in the country 10. Gregory D o e ...... 23 were there. SENIOR Competition in Quarter Midget 1. Peter Cam po...... 141/2 began early Monday morning. There 2. Tom G ie rtz ...... 71/2 were four rounds on each of the first As for some of the nitty-gritty, 21 two days, and two on Wednesday. entries competed. Most of tnem Ten rounds are a very thorough and flew Prather Little Toni’s, there were demanding test of the pilot and several each of Midget Mustangs plane. No one can say that the and Shoestrings, and two scratcn- winner was just lucky. How did builts. Up front, approximately two- things turn out? Well, wnen it was all thirds used Rossi .15’s, and the over, Bob Reuther, of Nashville, A close-up of Greg Doe's Little Toni says it all. remainder were Cox .15’s. It was not Tennessee, was top man, with 37 out uncommon for a contestant to have

John Brodbeck Jr. of K&B fame, with his colorful Polecat, which he Greg Doe, of Nashville, Tennessee, flew his beautifully finished green- flew to 14th place. Hmmm . .. wonder what engine he's using? and-white Prather Little Toni to 4th place in Formula I.

38 MODEL BUILDER Dave Shadel, left, of Vista, Ca., and John McDermott, of Greens- Tom Christopher, right, flew his Little Toni to 5th in Q-M, also set boro, N.C., with John's 5th place Form. I Little Toni. a new heat record of 1:26.8. John McDermott, left, was Tom's caller.

Tom Christopher's modified Rev-Up 7x6 prop, mentioned in text. Note swept tips. two planes . . . one Rossi and one Cox-equipped. The dominant prop was the Rev-Up 7x5N. However, it s interesting to note what was used on the fast-time plane. Tom "Thumb” Inspection time! Quarter Midget engine inspector Phil Bussell, center, stands by patiently as Christopher, flying a Little Toni with Q-M winner Bob Reuther pulls the head off his Rossi. a Cox .15, turnea the fast time of 1:26.8 . . . a new record. He also held the old record at 1:27.5. His prop started out as a Rev-Up 7x6, and ended up as a 6-1/2x5. One of the accompanying photos will give you a good idea of blade area and tip configuration. Tom was fifth overall, and might well have placed higher if he hadn’t stumbled and jammed his left thumb into a running prop for one of those good οΓ “O ’ neats. All in all, Quarter Midget competition at the Nats was excellent. It’s hard to resist using that tired old cliche' about a tough act to follow, but Formula One was up to it. Flying began on Thursday morn­ ing, ana followed the same format as Quarter Midget . . . four rounds each on the first two days, and two on Saturday. What did it all prove? Maybe nothing, but it was pretty obvious that consistency again paid off a lot better than occasional flashes of brilliance. Engines? Super Q-M winners circle. Top row (I to r): Dennis Sumner, 6th; Tom Christopher, 5th; and Brian Richmond, 4th. Bottom (I to r): Tom Baker. 3rd; George Parks, 2nd; and Bob Reuther, 1st. Continued on page 134

NOVEMBER 1978 39 Don Lodge's fantastic Lockheed Cheyenne helicopter. This is with­ The rotor blades on Don's Cheyenne are foldable for transport and out doubt one of the most ambitious helicopter projects to date. storage. Model is one of the first to use a rigid rotor.

PHOTOS BY AUTHOR UNLESS NOTED • This month, it’s welcome to Don been set up. 12 years with them,asan engineering Lodge . . . old time gas modeler and As a little background, Don Lodge test pilot. Now, if you chopper more recently, R/C helicopter en­ was born (a few years ago) in Colum ­ designers have any questions about thusiast. Don, as you may know, is bus, Ohio. He attended Purdue helicopter theory, Don is the man to the builder of that fabulous R/C University, in Indiana, where he see. Lockheed Cheyenne compound earned his B.S. degree in Aero­ Around 1974, Don built a Kavan helicopter .. . you’ve seen many nautical Engineering. In 1937, he Jet Ranger and became hooked on pictures of it in the model mag­ held the FAI record tor Senior Class the hobby. Naturally, his last project azines. As luck would have it, an old “ E” gas models with his own design. at Lockheed was the full-size friend of mine, John Minasian, was The following year, he was tne Cheyenne Helicopter, so what else telling me of his experience flying overall cham p at the Am erican to do except design a scale R/C the Cheyenne and working with Legion Nationals in Indianapolis. model of the Cheyenne? He cleaned Don on tne flight characteristics and Following a career in aviation, Don out a corner of his garage, set up an tests. He said ne would get in touch enlisted in the Navy and served as a Atlas 6-inch metal lathe, a drill press, with Don and have him send a few primary and advanced flight in­ bandsaw, and lots of hand tools, and pictures for the magazine. Well, structor during the war. After the started working with John Minasian Don did better than that. . . he sent war, Don completed his college on the fiberglass shell. Obviously, an entire series of photos (never degree and immediately went to they became close friends and have before published) and a letter de­ work for Cessna Aircraft as a heli­ enjoyed building and flying the scribing the machine in detail. It was copter engineering test pilot. (How latest in model R/C choppers! so well written and informative that many of you remember the Cessna Now, to Don’s own story, which we’ll publish it as received so you helicopter?) He was with Cessna for begins with a description: can see how the design concept has 5 years, then worked for Hiller DESCRIPTION evolved into an excellent chopper, Helicopters for another 6 years, MAIN ROTOR: 52-in. dia., 4 and how the flight test program has finally retiring from Lockheed after blades, Rigid rotor type, 1135 rpm

Close-up of the pusher propeller hub and tail rotor power take-off. Don's Cheyenne uses the same positive/negative spring control con­ Pusher prop is controllable from zero thrust to full forward thrust. cept as the full-size machine. Talk about authentic!

40 MODEL BUILDER (approx.). TAIL RO TO R: 10-in dia., 4 blades, 5318 rpm (approx.). PROPELLER: Pusher, 10-in. dia., 3 blades, 3000 rpm (approx.), control­ lable pitch (by R/C), constant en­ gagement with drive system. FUSELAGE: Molded fiberglass, length 51 in. LANDING GEAR: Scratch-built retractable main wheels. GROSS WEIGHT: 11-3/4 lbs. CONTROL SYSTEM: Collective: conventional. Cyclic: authentic Lockheed concept, positive/neg- ative spring “force” system. Landing approach. So far, only Don's friend, With the gear up, the Cheyenne makes a high­ ENGINE: Webra Speed .61. speed passat about 40 mph. RADIO: Kraft, KPS-15 & 16servos. John Minaian, has flown the model. GENERAL COMMENTS “To my knowledge, this is the only 4-bladea rigid rotor to ever fly using the authentic Lockheed positive/ negative spring cyclic control concept. I think it should be noted that this is not the very first rigid rotor to fly. That credit goes. I'm told, to a small group of Lockheed re­ searchers wno, in 1958 or 1959, flew a two-bladed rigid rotor helicopter (using the old reed radio, yet!). One source claims that control paddles were used, while another insists that positive/negative springs with a flybar were used. I suspect both are correct, and that a little of every­ Don's Cheyenne has separate channels for cyclic pitch, cyclic roll, and the tail rotor. The thing was tried, since it was a research fourth channel controls the throttle and collective, landing gear and pusher prop are on the 5th. program. “ All mechanical parts except the supports (in place of the usual "Also, to my knowledge, the gears, bearings, and cooling fan plastic tube restraints); and because Cheyenne has the first R/C control­ were designed and scratch-build my radio has only 5 channels, a lable-pitch propeller ever flown on specifically for the Cheyenne. Even somewhat unusual control set-up. a model (in this case a pusher, of tne engine muffler and neat sink are Cyclic pitch/cyclic roll, and tail rotor course). It may also have been the special, because of the space prob­ each nave their own separate first R/C helicopter to fly with lem. Rod endsand bellcranks,where channels. Engine and collective use retractable landing gear. . .at least, I possible, were obtained commer­ the 4th channel, and the 5th channel hadn’t heard of any at the time cially. controls the propeller pitch and the although now, of course, we know landing gear. That is, with the lever that Schluter and others are pro­ "Some of the unusual design full aft, tne gear is down and locked, ducing kits with retractable gear. features include: a thrust bearing in and the propeller is in flat pitch Finally, the Cheyenne is capable of addition to two radial bearings in (zero thrust). Moving the lever each main rotor movable hub (or full autorotation. More tests on this forward increases prop pitch, and at are planned for the future. fork); two intermediate ball bear­ DESIGN NOTES ings in the tail rotor drive shaft Continued on page 127 r

Power unit details, including the engine, muffler, heat sink, clutch, Close-up of the 4-bladed rigid rotor head. Outstanding design and and tail rotor/pusher prop shaft take-off. workmanship is evident.

NOVEMBER 1978 41 The pilot in Bob Bailley's Nosen Gere Sport is a perfect match to the WW-1 German fighter color scheme. Large pilot makes the model look a lot smaller than it really is ! MAMMOTH By RON SHETTLER • Before we get into the meat of this pilots, full-sized aircraft engineers, speeds) in relation to smaller and article, I would like to thank the modelers with many years of expe­ seemingly safer standard models is many people who have phoned, rience, and builders capable of quite an eye opener. It’s interesting written, dropped in, and otherwise producing these engineering feats to note that this was written by a commented favorably on what we at from scratch, are usually pretty professional mechanical engineer Model Builder are trying to do to responsible people. I hope this puts who can present facts, not opinions. help the builders and fliers of Mam­ some confidence into the thinking If this massive movement toward moth Scale aircraft. I would also like of concerned people, as while large large mini-aircraft (that sounds to thank those who expressed con­ aircraft can certainly cost a lot less in contradictory!) has done nothing cern over the safety of what we are dollars to build and operate, there is else but make us aware of our trying to achieve, and how it would a lot of visible effort going into the responsibilities, it has done a big affect standard modeling, as their final product, and certainly a lot of service to modeling, generally. A concern will help us keep on think­ time. As a result, you don’t try short time ago, in England, a boy was ing safety first. I do believe, how­ anything too foolish while flying, killed by massive injuries sustained ever, that we have to keep the facts and tend to keep up your main­ by a .19-powered sport model. I’m straight. Let me comment on some tenance, which will eliminate many sure his parents and the unfortunate statements made against our love of of those unexplained crashes, etc. owner of that model find nosolacein larger models. FactNo.2: The destructive en­ the fact that it wasn’t a big model that Fact No. 1: Generally speaking, ergy of large models isn’t necessarily so tragically eliminated their loved the many people with whom I have greater than that of smaller aircraft. one. spoken and corresponded are the In the August 1978 issue of MODEL Fact No. 3: We are already gov­ most responsible group of adults I AVIATION, under "Letters to the erned by full-sized air regulations in have had the pleasure of working Editor”, an article relating to the how and where we fly. Unfortu­ with, and I have been modeling a destructive forces of large models nately, these are being disobeyed long time. Active and retired airline (which generally fly at slower air­ every day, in all countries. Air

• ·

Les Hard, of Lansing, Midi., is currently building this 1/4-scale Stear Bob Bailley's Gere Sport makes a low fly-by. The only apparent man. Cowl for the 8-foot model is made from a 6-qt. kettle. change on the Quadra-powered model is the use of four ailerons.

42 MODEL BUILDER regulation officials have recognized that we have what appears to be a responsible organization of our own, which should police our own activities. Maybe we should do just that, before it is done for us. Fact No. 4: Air controllers are more concerned about what they can’t see on their scopes than what they can. Ignorance is not bliss, in this case. I’ve spent nearly half my life working with real aircraft, ana have taken courses involving ground approach systems. If the only reason you are able to continue flying in your area is because your model is too small to register on a radar A new one from Jim Messer is this Quadra-powered model of the brand-new Piper Tomahawk screen, then you had better re­ trainer. Jim hopes to have a kit for this airplane ready for delivery sometime in early 1979. evaluate your position. Would it surprise you to knowthatastandard- sized model can easily bring down an airliner? Also, please remember that pilots of full-sized aircraft don’t always follow the rules or realize the danger in colliding with a model. I dont know how many times I have been buzzed by a pilot who thought it was a big joke to watch my model tumble in nis wake, not realizing how close he came to hitting a second model he didn’t see. One thing forsure,our bigger modelsare going to be more visible, and we're going to have to be more respon­ sible in what we do and how we do it. I’m confident we can do it. One columnist was concerned about the Jim and his Tomahawk. Modern light aircraft seem to be popular subjects for 1 /4-scale, yet are new 1/4-scale pylon events. Perhaps seldom seen in normal-size models. Wonder why that is? it would put his mind at ease if ne three major causes of accidents concoctions of our own, using knew that his organization wants to among scale modelers: excess Mighty Midget motors with one 7- slow down the event, and has since weight, lack of usable power, and to-1 gear reduction. Midget? run 1/4-scale events in which people most important, flying practice. Vaguely. Mighty? Noway! Since that performed slow rolls and loops in time, new modelers have had it easy, the course area and ended with I sure wish the people who are never having experienced a hung­ slow, soft landings. They were de­ throwing rocks at our section of the up escapement, etc. In a way, they scribed as real "pussycats” in flying, hobby would have something con­ are very lucky, but they did lose which hardly indicates any relatively structive to say, or at least something some very valuable experience in dangerous traits in the larger air­ based on experience of actually designing efficient control systems. planes. designing, building, and flying I, for one, became lazy when the Fact No. 5: Large Mammoth Scale Mammoth Scale aircraft. When I new powerful servos came out. models can handle theadded weight hear some of the comments, I won­ Mammoth Scale has forced me to of scale details better, and since they der where the “experts” were when use them efficiently again. I wonder are generally more rugged, they we flew big models with rubber- how many modelers realize' that tend to be flown more often and for powered escapements, German some fairly large model gliders were longer periods of time. If adequately Bellamatic servos with an advertised controlled by the influence of a powered, this will cut down on the thrust of 5 oz., not 5 lb., and various magnetic compass. You didn't waste power there! Mammoth Scale models have a built-in safety feature, in that they are not "instant airplanes”. A lot of building experience and engineer­ ing is required to get one to the stage where it will fly. They are usually built by experienced mod­ elers, or ones who realize that this is a serious project and that asking for advice from experienced modelers is no insult to tneir intelligence, but actually proves that they have some. See sketches next page. ------► Another of Jim Messer's biggies is this Quadra-powered Ercoupe. This one is also due to be kitted, supposedly sometime late this year. Continued on page 109

NOVEMBER 1978 43 44 MODEL BUILDER Here's an idea! Dan Crum's Mach I as modi Murph Misiewicz, Encinitas, California, and Roger Taylor put semi-symmetrical section fied for aerobatic slope soaring. Windspiel Fokker FK3. on Aquila inboard panels. «c SOARING by Dr. LARRY FOGEL.

• The South Bay Soaring Society Scale Contest brought the big ones together in San Jose. The first day was devoted to static judging which was held indoors . . . and that was most appropriate, in view of the weather conditions. But you can’t keep good pilots from flying, no matter what; the contestants put various birds into the air, saving their exauisite scale ships for the second clay of the contest. The air was turbulent, and landing was exciting every time. Vern Burger directed the contest, and things went smoothly. Jon Lowe entered his Soarcraft Glasflugel 604, and served as contest manager as Jon Lowe and contest winning Soarcraft Minolta gets one shot per flight in Mack well. The other aircraft ranged from Glasflugel 604 in San Jose. McDowell's Wanderer.

Handful of R/C retracting and braking mechanism built by Jack Al Doig loops wire skid around wing joint wires. Wing tape holds Alten, San Jose, for his Jantar. all in place.

NOVEMBER 1978 45 Scale ships lined up for judging at South Bay (San Francisco) Soaring Society Scale contest. Big scale birds are increasingly popular among soar­ ing elite.

Al Nagele's LNG 3100 with experimental "ter­ raced" wing. Clark-Y airfoil. Looks Pilot relaxes in cockpit of Ray McGowan's Jantar, built from German kit. Note folded quarter- promising. scale chart . . . in case radio fails.

Dick Eagle, Chula Vista, Calif., built this Senibr Falcon "Flying Atlas" glider launcher. Shown aboard is Larry Fogel's Windfree. Launcher is adjustable, has taken many gliders aloft.

46 MODEL BUILDER Designer/builder Roger Sanders, Atwater, Calif., and his Windfreak Joe Newland's 8-pound Kestrel, built from outstanding Ralph Lear flying wing. mont semi-kit, Australia.

Newland's Learmont Kestrel on final approach. Ship was first in static judging.

offered by Ralph Learmont. of Mel­ scale air chart, in case some naviga­ bourne, Australia. Joe included tion might be needed aloft. Other In-line radio installation in Roger Sanders' every detail, and his construction aircraft included the Diamant and Windfreak. Glove-like fit. was immaculate. He clearly won first Libelle. By the way. Jack Alten, of place in the static judging. Ray San Jose, is now building a Jantar scale antiques, such as that offered McGowan entered an eight-pound which will have a retractable landing by Jerry Arana, to modern quarter- Jantar built from the German kit. ear with remotely-controlled scale replicas of the Kestrel 17 and The model pilot in the cockpit had a raking. Jantar. Joe Newland and I entered full set of instruments in front of The weather was perfect on the Kestrel 17's, built from the semi-kit him, and even a folded quarter- Continued on page 125

Retract mechanism builder Jack Alten and his Diamant scale entry. Close-up of pilot in Jerry Arana's antique primary.

NOVEMBER 1978 47 10 W AYS TO LO SE A SAILPLANE CONTEST By DAVE THORNBURG . . . Our author applies a little "reverse phsycology" to point up various traps that some of us may fall into when getting a little too up tight about bringing home R/C soaring trophies. • Everyone who visits the trophy his “ Sagwing 900” without benefit of the Ten Commandments, they're wing of Chateau Thornburg asks the either a timer or a transmitter. Hey, virtually impossible even to remem­ same questions during the tour: presto. . .he loses! How deceptively ber . . . let alone practice . . . all at "How can a pilot with thirteen years simple it all looks; without expe­ once. But if you’ll just follow any of R/C soaring experience fly so rience, without effort, without art, three of them religiously, you’ll consistently to FIFTH place?” “Ain’t he simply steps up to the flight line soon find yourself out of any clanger you ^ot any first-place hardware, and loses! of winning, safe in the fold of the man?Y' "Be honest now . . . how do We call this “beginner’s luck”. also-rans: you always avoid winning?” It never lasts. Too soon, our begin­ GET DOWN ON THE At first, I brushed these questions ner starts to accumulate experience CONTEST BEFORE IT STARTS aside as mere polite chatter, but and sophistication, and his natural No contest is perfect, even on gradually I came to realize that talent for losing fades quietly away. paper. Examine the written rules people really were interested in the He attends too many contests. He carefully. . . pick ’em apart. Remem­ Art of Losing. After all, losers out­ becomes blase. It is then that the ber, the rules are always designed by number winners at every contest odds start to catch up with him; his people who plan to cheat you out of you attend . . . sometimes by as scores creep slowly out of last place your eyeteeth . . . who else would much as a hundred to one. Yet no into the middle range, and finally put all that time and effort into one, to my knowledge, has bothered into the top 10%. something they don’t get paid for? to compile any sort of checklist for Here the danger of winning, which Make alist of the worst thingsyou all these prospective losers. No one had always seemed as distant as old can say about the contest (don’t has attempted to set down the basic age, becomes suddenly acute, omit personalities). Then find some­ guidelines for becoming methodi­ threatening. All at once, our former body else with bad digestion, and cally mediocre, dependably defi­ beginner finds himself standing compare your list with his. Try to cient, an accomplished also-ran. naked and exposed before Dame out-bitch each other, it’s surprising I began to give the matter some Fortune. All at once, the merest what a little friendly competition thought. fluke of luck could destroy his can do for the quality and spirit of Losing appears to be such an easy unbroken string of losses forever. . . bitching. Even if you don't succeed and natural thing, when we first unless he iswillingtostoptrustingto in talking each other out of attending begin to compete! The beginner chance and begin to make a con­ the contest, you can usually lower goes to his first contest, hears his certed effort to lose. your joint enthusiasm enough to name called to launch, feels every If you find yourself in this position, avoid any danger of winning. eye on the field watching him as he dont panic. Here are ten simple DON'T PRACTICE THE stumbles to the flight line in a rules to follow that are guaranteed EVENTS IN ADVANCE sweating, panting blpr,and launches to keep you in the loser’s circle. Like If you do, you’re sure to have an unfair advantage over 90% of the other contestants, who haven’t even read the rules yet. And no one likes a person who takes unfair advantage. For example, if you plan to attend a contest that requires precision landings, the very worst tning you could do would be to go out sport flying with a cheap tape recorder (or an expensive friend) to count off the last minute of every flight, so that you could set up a consistent land­ ing pattern ana practice it under time pressure every time you fly. Simulating contest excitement and confusion is another way the unscrupulous gain an unfair advan­ tage. I nave known pilots who go out to practice landings and deliberately park their cars beside the field in a tow-away zone, or deliberately set their landing Frisbee underneath wires or goalposts, or ask a buddy to shout out last-minute pattern changes (“Switch to a right-hand pattern quick! Here comes a Sail- Continued on page 135 48 MODEL BUILDER • How does one summarize the 12th Annual SAM Championships? Simple, use that overworked word . . . Great! Before any more is said about the Champs, full credit should be given to Woody Woodman, Con­ test Manager, for all the extracurri­ cular work he got himself involved in. Not content with getting out all the literature, arranging for the field, and answering all telephone calls, he was host to ten of Britain’s Old-Timer modelers. To say that Woody’s summer home was slightly overloaded was the understatement of the year. Between he and his wife, Evelyn, the British boys learned what American hospitality is all about. To cap things off, Woodman also hosted a special barbecue and sup­ Dear old Dad Moucha releases Powerhouse for son, Walt, during the 12th Annual SAM Cham­ per for all the retiring and new pionships. officers of SAM. This, plus the English boys and a considerable number of late invitees on hand, made for a big crowd. You didn’t dare leave your seat, as it would promptly be taken by another modeler wanting to M /6 s p a r k s join the bull session. Things like this PHOTOS BY AUTHOR make the SAM Champs what they are: thoroughly enjoyable fun! By JOHN POND The columnist and Bill Bowen drove across the country to arrive whole day at the free flight area making it a real potent flyer. Hank around 4:30 p.m. at the Annual SAM (we’re gonna be short on F/F pics Bean Feed at the Coyle Air Drop also brought out his original Baby Field. Things were in full swing, with this time). Some of the great snots Cyclone-powered seaplane to show were of Dave Baker holding John the columnist (hopefully, this will be hot dogs, hamburgers, and even steaks available to the lucky. Beer Haggert’s version of the Lanzo R/C a future Model Builder scoop). He Sti«ck, complete with radio. Other has decided to call the seaplane the was the main beverage, with soda good shots were of Dave Dodge “Ho-Cat” after all these years. pop available to the teetotalers. with a most unusual rubber job, Time went to darn fast, as usual, that designed by Kukavich, called the We didn't talk about the weather it was dark when the party broke up. “Flying Broomstick”. Other goodies or the surrounding territory, but we We mentioned it previously, but were Sal Taibi’s version of the did try to tell you in previous issues. well worth noting was the gang from Anderson Pylon (there’s a planethat As promised, the area was sur­ England, headeaup by Dave Baker will dominate the Antique event); rounded by small trees and practi­ and Ben Buckle. Surprisingly,quitea both Bill Henns (Junior and Senior) cally impenetrable brush. The first few places were taken by Ben had excellent flying models; and two days were pretty fair for Buckle, while Dave and the boys quite a few of the English lads. Oh weather, as the wind never got over suffered some real tough breaks. well, we’ll gettum next time! 15 mph, but on the third day, con­ One of them, Ken Hinton, brought testants were greeted with a 15-20 an R/C Class A model and placed Henry Struck made one of his mph wind to start with. As storm fifth against some very formidable infrequent appearances at the SAM predictions arose, so did the wind. competition. Champs with nis original New Ruler. Only a few models were lost on It truly was a shame the columnist The original Brown Jr. has been the first day, but the third day found lost one roll of film, as he spent the replacea with an Anderson Spitfire, the thickets dotted with models.

"SAM Speaks" editor, Pete Vano, nearly won Antique with his Pond's winning Dallaire for 1978 has reverse color scheme of the Powerhouse. 1974 winner. O.S. -60 four-cycle power. 49 NOVEMBER 1978 John Sto« pumps up tires on his compressed air entry. Looks like Stott launches his compressed air model. Extremely light structure beer can tank. required. job of monitoring. Only one model shot down, and then on a question­ able issuance of frequency pin. Great cooperation!

4 The electric events, run by Joe Beshar and John Pond (as sponsored by Astro Flight), were quite well attended, and flying was interesting. Joe Beshar ran a different type of contest, where he drained the bat­ tery to a certain point, recharged it for one minute, and then you were allowed to fly. Joe claims this is a great leveling factor in electric, but frankly, the columnist doesn't like Photo can't do justice to this gorgeous Megow Soaring Eagle by Joe Coles. Also a graceful the idea of draining a Ni-Cd battery flyer. every time. They don’t like treat­ ment like that! Also, several cases were cited of Hatrak as a self-appointed assistant. The R/C Electric event was won passing motorists appropriating Carl did yeoman work that received handily by the columnist, using a models that landed by Hwy. 70. If it scant appreciation at the awards. Turner Special that employed a hadn't been for the strong wind on Unfortunately, Tom Knakal geared Astro Flight 25 motor and the last day, most everyone would started to have disconcerting chest 18-10 prop! Cliff Schaible should be have to say it was a good meet from pains on the third day, and nad to given credit for taking the time to start to finish. leave his trusty aides, Keith Grote troubleshoot the broken leads in Contest Directors Tom Knakal and John Kungl, to finish up the the battery pack, which resulted (R/C) and Don Garafalow (Free contest for him. We should also from the long trip across the USA. Flight) deserve all the kudoes they mention the tireless work of Arnie After he got through checking over can get. They put in their time Hernandez and Dave Jagge: good the batteries and charging system, tirelessly, and without complaint. men! Of course, John Hill, the the model never flew so good! Don was lucky, when he took over frequency control man, lasted the In that same line, word has just Jack Florenzie's job, in having Carl whole route and did an outstanding reached the columnist that Barnet Kernoff, of Tyro Models, is ready to place his kit of the Turner Special on the market. This seven-foot model kit will be sold for approximately $55 retail. All parts, as in his Playboy kit, will be completely cut and formed. If you have had one of these kits, you can appreciate the new Tyro kit. Write Tyro Models Supply, P.O. Box 11511, Palo Alto, CA 94306 for further information. Probably the most spectacular sight was tne mass launching of all twin pushers, to determine the winner. The columnist was really sorry to miss this event, as he had carried a Schmaedig-type twin pusher 3000 miles to compete. Un­ fortunately, the writer failed to plan properly, and found he had four events to fly on the last day! Plan ahead! The winner of this sudden-

50 MODEL BUILDER Dave Dodge won the Compressed Air Event with this 1932 Hughes Close-up of Dodge's winner. Motor mounts on nose of air tank. Hobart design. Tom also spent quite a bit of time at the free flight area, winning fifth in Class A Pylon, and third in 30Second Antique. This guy never runs down! We didn’t mention the old master, Sal Taibi, attending his first East Coast SAM Champs, but the boys won’t forget him in a hurry, as he won the 30 Second Antique event, the .020 Replica event, and the Flying Scale Gas event; not a bad haul. Incidentally, for the benefit of the many modelers who have inquired about the model, Sal flew an Antique design called the Anderson Pylon. This design was developed at the same time the Zipper-type models were coming out. Anderson put his square model on edge, to Danny Sheelds' scaled up Burd Kingburd. Ship is either huge, or Danny has been dieting! Ohlsson 60 engine. form a diamond fuselage with a natural point for pylon installation. death type of flyoff, where everyone event, taking second in Class A This 1937-38 design was uncovered launches at once, was Dave Dodge. Glow, fourth in Class C Ignition, fifth by Louie Levine while doing some Even Bert Pond was beaten! in R/C Antique, third in Class B detective work on Melvin Yates’ As usual, the .020 Replica F/F Glow, and fourth in Class A-B Igni­ designs. It should prove to be the event was the heaviest entered, with tion. Whew!! Not content with that. dominant plane in the Antique over 40 entries. The old master, Sal event in a few years. Taibi, showed the boys how we do it About this time, Wednesday had on the West Coast by flying his arrived, and with it, the annual SAM Playboy to a convincing victory. Business Meeting. Here’s the report: Interestingly enough, Barney Ono- ANNUAL SAM BUSINESS MEETING fri flew a miniature version of the Held on Wednesday evening at Trenton Terror, designed by his the Forked River House, on Route 9, friend. Mickey DeAngelis, and this meeting turned out to be a live placed fairly high. one over the present method of rule The guy who got the most mileage changes. So many frivolous rules out of his models was Larry Boyer. have been introduced and passed He was able to win Class C Cabin, that SAM President joe Beshar ap­ fourth in 30 Second Antique, and pointed George Armstead to head first in Fuel Allotment,usingjust one up a committee and come up with a Bunch-powered Comet Clipper. A recommended procedure. real good performer with that hot- running Tiger! Coupled with his Armstead put forth three ideas as places in Class A Cabin and Class B to how rule changes should be Cabin, Larry was far out in front of all instigated, varying all the way from others for the Free Flight Grand dropping most all present rules and Champion. flying by the local rules used in that particular region, to a strict AMA On the othersideofthecoin,Tom system of Contest Boards, review Accavatti (who also flies a lot of free committees, etc. His proposal No. 2, flight) won the R/C Grand Cham­ the so-called group approach, was pionship with models that had been deemed the best, this being that the well-tested during the contest sea­ Miss 1978 SAM Champs, Beverly Hartman, SAM Chapters would submit all rule son. Tom was in practically every holding Jim Travers' Scorpion. changes. NOVEMBER 1978 51 President...... John Pond Secretary-Treasurer . Tim Banaszak East Coast V.P.. .Woody Woodman Central V.P...... Woody Bartelt Rocky Mtn. V.P...... Lin Haslin West Coast V.P...... Jim Adams The new president, John Pond, was then installed. Pond announced that he had prevailed upon Pete Vano to continue in his present position as Editor of “SAM SPEAKS”. His excellent work was eulogized by both Beshar and Pond. In addition, the present Rules Coordinators, Tom Accavatti for radio control, and Gene Wallock for free flight, have agreed to continue on in tneir present positions. After all, why say whoa in a horse race? The men have proven themselves able and competent. The new President then brought up the idea of pushing SAM mem­ berships by requiring all SAM Chap­ ters to have 100% registered SAM members. This idea was shelved with the statement that each Chap­ Jack Bolton holds, Dave Jagge adjusts prop. Rich Tanis squeezes watch. Jack didn't bend Pylon Buster's fuselage, it's built that way! ter should be responsible for its membership in SAM. Also brought This was challenged by the West­ ideas were combined, with the idea up at this time was the idea of ern Vice President, John Pond, who that SAM Chapters or 25 members restricting SAM contests to SAM put forth the Heilman proposal (in could propose rule changes. The members. Tim Banaszak reported essence, quite similar to tne Arm­ idea of restricting members to vot­ that any contest with more than a stead idea), which allows any person ing on only one class was tossed out. Class A sanction from the Academy or group who could amass 25 sup­ However, a compromise was ef­ of Model Aeronautics does not porting votes to place the rule fected on this, as all ballots were to allow such prohibition. It was re­ change on the ballot. For those carry the admonition to vote only on solved that entrants be charged on individuals who could not get 25 those proposals that were in your the basis of whether or not they votes, the proposal was to be pub­ field of interest. belong to SAM. lished in SAM Speaks, in the hopes Don Garafalow then read the The Treasurer reported that the of attracting enough votes for the results of the recent SAM elections. SAM treasury was in good enough proposal. The following were elected to shape that several more SAM Cham- After lengthy discussions, the two office: Continued on page 113 OLD TIMER Model of the Month ^ I GARAMI'S Designed by: Louis Garami Drawn by: Al Patterson Text by: Phil Bernhardt GULL WING • This month’s Old Timer is just one of a profusion of small rubber- owered fliers that continuously Sowed from the bench of Louis Garami, who is well-known among O.T. enthusiasts as one of the most prolific model airplane designers ever. The May 1937 issue of Flying Aces featured full-size plans for this little gull-winged snip, which Garami claims was inspired by watching seagulls! There really isn't too much to say about the model, as it follows con­ ventional construction and flying techniques. MB’s draftsman, Al Patterson, usually makes a little sketch of whatever Old Timer we feature, but this time he figured it nose bearing, and also made the bird is built right to the plan, and would be easier and quicker to just front wing clip deeper than the rear, flies great. go ahead and build one. Al used a 7- so that the wing incidence can be Now, to convert the model to R/C inch North Pacific plastic prop and adjusted. Other than that, the little . . . what? · 52 MODEL BUILDER GARAMI'S GULL—WING

DESIGNED BY: LOUIS GARAMI PUBLISHED IN MAY 1937

NOVEMBER 1978 enced friend told me, "Think of a filter as an airplane . . . don't try to fly without one." Now that your tank is full of clean, fresh fuel, let’s discuss some 1/2A starting techniques. The procedures outlined in tne Cox instruction sheets work very well. We suggest P.O. Box 1426 17119 S. Harvard that you usethem duringtheengine Mission. T X 78572 JOE KLAUSE Gardena, CA 90247 break-in period. P.O. Box 2699 Another method is to use an Laguna Hills, CA 92653 electric starter. This way you can be absolutely sure you’ll have plenty of Send in your questions, relative to glow or ignition engines, and these junk engines and parts in no time at experts will give you the correct answers. all! Although an electric starter can be used on a T.D. without ruining the engine, it must be used very Klause about a third more per ounce, compared to the gallon size. A pint judiciously. Further, you will have to • Last month, we discussed various will cost about two-thirds more per frequently replace the fiber thrust commercial fuels, and offered some ounce than the gallon size. The washer, and adjust linear crank­ suggestions for 1/2A engines. Let’s difference is due mainly to pack­ shaft “ play” so that the crankpin assume you’ve decided on a fuel, aging costs. does not rub against the backplate. and are on the way to the local Our next subject of discussion is NEVER use an electric starter on a hobby shop. Are there any other fuel filtering. Since very small specks reed valve engine. Personally, we do things to consider? There sure are! of dirt can easily clog the needle not use an electric starter, if for no To get into an inquiring frame of valves of 1/2A engines, or foul the other reason than that the following mind, pretend that you’re going to a operation of reecf valves, we must technique works better, and it won't used car dealer. O K, you’re going to keep the dirt out by filtering the damage an engine. It was developed do a lot of careful looking, and you fuel. There are many brands of fuel during Class II Mouse Racing, where sure are going to be suspicious if filters available, and they're inex­ fast engine hand-starts ana restarts ou hear anything like, “Yes sir, this pensive. Just be sure to use those are a “must” if you want to be ere can of fuel is practically brand that have very fine screens ... 80 or competitive. new. It's always been kept in air- 100 mesh. First, begin by bringing the engine conditioned storage, and it’s only Our suggestions for usage are up on compression .. . piston just been brought out on Sundays.’’ brief and simple. Always use a fuel past the top of the exhaust port. Seriously, look at the fuel container. filter: (1) when filling the tank of Now, install the prop at the 10 o'clock/4 o’clock position, and Does it look new, or is the label your plane, and (2) between the tank and the carburetor. Thissecond secure it tightly in position with the faded, and the can full of dust? If the spinner ana the 5-40 machine screw. container looks like it’s been around recommendation isn’t very feasible with reed valve engines, because Note: In place of the standard awhile, then the fuel probably isn’t round-head, slotted screw, we use a fresh. If it’s not fresh, tne chances of the needle valve is an integral part of the backplate and tank assembly. one-inch 5-40 socket head cap it burning well are poor. You’ll have screw. It’s much easier to torque it trouble starting, setting the needle, Therefore, it’s essential that you sufficiently so that there will be no and all sorts of other good things. filter the fuel before filling the tank. prop slippage. This is so, because, just like you and Filters are so important that it's really Second, open the needle valve 3- I, fuel ingredients slowly decom­ amazing that so few people use 1/2 to 4 turns, and ensure that the pose with age (my apologies to all them. Long ago, a good and experi­ fuel line is full of fuel. Then, as- senior citizen modelers). The methanol in the fuel may also cause another problem, because it very readily absorbs moisture from the air. Methanol stored in a low- density plastic container will actually gradually draw moisture in through the plastic! Besides the fact that engines don't run well on contam­ inated fuel, the water will oxidize aluminum and rust steel engine parts. For best results, we suggest that you: (1) start with fresh fuel; (21 store it in a tightly-sealable metal con­ tainer; (3) keep it out of the hot sun; and (4) tightly recap it after each and every use. In a similar vein, if you have half a can of fuel that’s been sitting around the garage for a long time, save yourself a lot of trouble, and get rid of it. One other consideration. How much 1/2A flying do you expect to do in the coming weeks? If you buy in the quart size, it will cost you

54 MODEL BUILDER suming the engine is not completely dry, hold the plane so that the cylinder is in the horizontal position. With the piston on compression, put one good drop of fuel on the piston/ exhaust port area, and then flip the prop through once. Return the plane to its normal position so that, when the prop is on compression, it will be at the 10 and 4 o’clock position. Third, attach the battery clip or “hot glove”. Hold the plane off the ground. Then, starting at least 18 inches away, with a positive, force­ ful, and straight, downward motion, strike the 10 o’clock position prop blade with your index finger. Follow completely through, and the chances are nine out of ten that the engine will start. The secrets of this technique are that just-right amount of prime and sufficient force to An FMO .61 twin, belonging to Ron Ford and converted to ignition by Otto Bernhardt. If rotate the prop through two com­ you've got a photo of an unusual ignition engine, new or old, send it in! plete revolutions. In Mouse Racing, when we refuel racing, if you use a pen bladder tank, Marvel Mystery Oil, or Rislone will during a pit stop, our tank arrange­ simply unpinch the fuel line as soon do nicely. ment automatically squirts over the as the engine fires on the prime. Next time around, we'll provide cylinder exhaust port area with the The above procedures are good some test stand data for various glow piston in the on-compression posi­ reference points. If you find some heads, and provide combustion tion. Any excess drips off, and just other slight variation that you like, chamber/nitro percentage guide­ the right amount remains on the that’s great. Use what works best for lines. Again, if you have any ques­ piston. Since the engine is up to you! tions, just send a stamped envelope temperature, we then merely mot When you’re through running the to: Joe Klause, P.O. Box 2699, Laguna love” the glow head with the left engine, use a preservative to protect Hills, CA 92653. · and, give it that hefty downward it. At this point, we caution against prop flip with the right index finger, BERNHARDT the practice of flooding-out the • Some of my readers have asked and away we go. engine to “ protect” it. The theory is me to devote an entire column to It will take a little practice to that by ricnening the mixture and troubleshooting an ignition engine, become comfortable and confident flooding-out, the lubricant in all that so this month, that is exactly what I with this technique, but the results extra fuel will coat and protect the am going to do. Some of the follow­ will be rewarding. Incidentally, we engine parts. The methanol absorbs ing could also apply to glow engines. use the same procedure on reed moisture, and that leads to corro­ An analysis of the most common sion. We suggest pinching-off the valve engines rather than using the type of two-cycle ignition engine spring starter. In essence, that one fuel line to stop the engine. Then, thoroughly coat the inside of the reveals that there are four basic hefty flip is equivalent to the force of moving parts, consisting of the the starter spring. For 1/2A pylon engine with a preservative. WD-40, crankshaft, conrod, piston, and breaker point. All other parts are 4* r BOOSTERS -η — static and not subject to movement I (3 VOLTS] i during normal operation. Due to these very few moving parts, troubleshooting becomes very simple, and the solution is usually arrived at very quickly. In case the reader is not familiar with the proper electrical hook-up, a sketch is in­ cluded, showing all components in their proper perspective. “That's fine,” you say. “ Mine is hooked up just lixe you show, but it still refuses to start.’* O K, let’s.try to find out why, checking out each possible source of trouble. Electrical wiring is the most com­ mon cause of ignition problems, primarly because of sloppv w work­ manship. All wiring should beof the stranded type, and all connections should be soldered, not twisted together. So. for starters, check all of the wiring for loose or broken Con tinued on page 123

NOVEMBER 1978 55 y ?

Fins on leading edge of wheel fairings were carrier deck arresting cable deflectors. Cable was normally 12 inches above deck, and 2 inches above axle on Sparrowhawk! Photo at Long Beach Naval Reserve Station, California.

"SPARROWHAWK"

PART TWO CURTISSby PETER WESTBURG F9C

• The XF9C-2 was like its predeces­ was needed, and that slight move­ to release the spring-operated lock­ sor, but the upper wing was raised ments of the rudder caused the ing cam. The system had too much four inches, and the landing gear airplane to yaw violently. A rectang­ give, but this was finally corrected. lengthened to increase the angle of ular section nine inches wide was The six F9C-2's (s/n 9056-9061) attack during landing. The latter added to the fin, causing a flat spot were assigned to the USS Akron. change permitted the engine to be in the contour of the upper vertical Fortunately, all were on the ground lowered one and a half inches and the tail. And there were problems with when the dirigible was lost in a prop diameter increased from 96 to the hook release. Engagement and storm off Lakehurst, N.J. The aircraft 102 inches, without impairing prop locking were automatic, but release were reassigned to the Macon, and tip ground clearance. The XF9C-2 was manual, with the pilot tugging when it too went down in storm off was listed with the Department of on a cable and linkage mechanism Big Sur, California, February 12, Commerce as NX-986M, since it was a private venture civil airplane. The Navy paid Curtiss one dollar to demonstrate its performance; it passed the Navy s requirements, and two days later, Curtiss received a contract tor six production units. Six weeks after the last airplane was delivered, the Navy bought the prototype, assigning it s/n 9264. During the test program, consid­ erable criticism was directed at the airplane by test pilots. The wheels were too small, the axle dropping two inches below the arresting wires during deck landings. The problem was solved by adding deflectors to the upper forward leading edges of the wneel fairings. The airsnip nook- on tests revealed that the directional stability during low sp e e d approach­ With dollars tight in 1930, Navy refused to spend S9.25 to have "U.S. Navy" painted on bot­ es was so poor that full right rudder tom surface of lower wing! Walt Stampfli photo.

56 MODEL BUILDER a ib t o il CYH CYH

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TO 10 06' • .31 7^0: V40 T S T Á R U « * :· for BOTTOM VIEW

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o»· ( o»· TRANS ANTENNA ΓΤΛ CIMENMONS CIMENMONS IN IN/FT fin ‘ ‘ / ^-63(11 7S) INTO OORSAL 2* 2* OFFSI T BUILT - SMS (243.4) s V V V1.9»S-sJ l.4»i 6-S! .*3 7-9 0 1.2Si 2-S i i 5 i * • • · m.m·, M'tKga M'tKga m.m·, ! LWR UP II UP «4-75 (SM)« «4-75 7413 7413 I3-S134 3J t IMA) t \ ' ' ( SAFETY. HOOK HOOK RELEASE. 4 R. SPAR. 4 ř SPAR STA.42-S (100-0) CORK CORK WALKWAY. ALUM. ΓΡΑΜΕ . 2S(fcm«n) HA CK BORDER -S TA -22.S (S7.2) »oC«»ri 2 37S(60-3)R2 a ir f o il 0 (l4 2 .2 4 ) C Y H l a r k C STA. M -o f n .l ) 4 Λ. SPAR FLOTATION SAC CO1 BOTTLE Μ SLOTS H* SEWING FABRIC l!*-OS) •LAW 197· SETTING- ·τ *ÍO(IOOJ)R

NOVEMBER 1978 (JI 58

46-0(m -·) o OE BUILDER MODEL 1935, four of the Sparrowhawks (s/n 9058-9061) were aboard. Of the four remaining aircraft, the original XF9C-1 was transferred to the Naval Aircraft Factory, where its useless hook was removed and where it was used as a utility plane until 1936, when it was scrapped. Aircraft Nos. 9056, 9057, and the XF9C-2, 9264, went to the NAS at San Diego. Later, the XF9C-2 went to Anacostia, where it was used as a utility airplane until it crashed in a pea garden near Monaskon, Va., in November of 1936, and was subsequently scrapped. No. 9057 was scrapped at San Diego, but 9056 was sent to NAS at Hampton Roads. In June of 1939, it was scheduled to be surveyed, but the Commanding Officer suggested that it be turned over to the Smith­ sonian as a historical aircraft. Re­ cently refurbished and restored, s/n Assigned to the Akron, 9058 received blue recognition color; band on fuselage, chevron on wing, 9056 now hangs from the ceiling of wheel fairings, cowl and anti-drag ring. Nine inches added to fin, blue portion. the National Air & Space Museum. The coloring and markings of the the airplane was entirely metal and removed when the Sparrowhawks F9C-2’s were unusual, making them was painted a light gray, nearly an were assigned to the Macon, during good subjects for modeling. The off-white. Each of the six F9C-2’s was which time the horizontal and verti­ basic color of the fabric on the given a recognition color which cal tail surfaces were painted blue- bottom of the upper wing and both appeared on the anti-drag ring, the black. surfaces of the lower wing was wheel pants, as a band around the aluminum pigmented dope. The top fuselage, and as a chevron on the surfaces of tne upper wing and the upper wing. The airplanes had the horizontal tail surfaces were the "Men on tne Flying Trapeze” insig­ familiar chrome yellow. The rest of nia, but these were supposedly

Prior to photo of 9058 above, 9056 in flight photo shows first increase in vertical tail area to overcome turbulence created by hook structure, a 2-7/8" wide strip on trailing edge of rudder.

NOVEMBER 1978 59 available in four and six-channel versions, are that company's answer PRODUCTS IN USE to the needs of the newcomer and sport flier who does not require the KRAFT KP-6A SPORT SERIES SYSTEM ... by ELOY MAREZ luxuries of the more advanced and more expensive systems, such as • I had to fix it before I could fly it! you control your throttle if you have changeable frequencies, maneuver The Kraft KP-6A Sport Series system, to overcome spring tension to go to buttons, single sticks, etc. They are as impressive as it looked when it high, and when you relax the available only in the favorite two- arrived in its protective foam con­ pressure, the throttle automatically stick configuration, and only on 27 tainer, had a serious production comes back to center? (Mode I fliers and 72 Mhz frequencies. Tne one flaw, lack Albrecht (Cnief of Pro­ just can’t seem to get their act concession that has been made to duction) and his crew down in Vista together! wen) the more advanced flyer is that the must have built this one on a M on­ It wasn't quite as serious as it KP-6A allows him to retract his gear day morning, before the first coffee looked, though, as it took less than and operate one more function, break! five minutes to locate and correct with switch and lever-operated The transmitter’s open gimbals the problem. Only a pair of needle- controls not found on the KP-4A. looked and felt great, but the one on nose pliers and a small screwdriver TRANSMITTER the left had a ratchet in vertical were used ... none of those silly The transmitter, designated as travel, and how can you fly with a scopes and frequently-counters Model No. KPT-4A and KPT-6A, four ratchet on the elevator stick? The were necessary to make this into a and six-channel respectively, is one on the right wasn’t ratcheted, proper Mode One transmitter that a another in the series of gold vinyl- but was spring loaded in the center person can fly. clad aluminum cases we are all so position. Now I ask you, how can The Kraft Sport Series systems, familiar with. Physically, there is

Receiver guts. Note the open component placement. PC board has Transmitter guts. New Sport Series transmitters use only five 550 wide, cleanly spaced lands. MAH cells, for a total of 6 volts.

60 MODEL BUILDER Different servo trays available. Middle servo in the three-abreast tray The Dynamic Duo! Connie Mosteller and Dave Shadel at one of the is missing a screw . .. don't try to fly without it! '78 trade shows, telling the world all about Kraft Sport Series radios. little to distinguish it from other tion by a simple but effective guard they are the first to deviate from the recent Kraft Sport Series transmit­ that doesn’t interfere at all with traditional eight-cell, 9.6-volt power ters. It measures 6.1 inches high, 6.75 normal operation of the switch, or supply. They use five cells, at a wide, and a comfortable 1.9 inches et in your way when you are busy nominal 6 volts. The cells furnished thick. The smooth-working, good­ ying. are 550 MAH ni-cds. The use of the centering open gimbals, fabricated The six-channel KPT-6A has the lower voltage is possible by the use mostly of plastic and using coil two additional channels; one of another innovation, an FET (Field springs for centering, are well switch-operated (for retracts) and Effect Transistor) used in the final RF located, and the whole thing fits and the other lever-operated and fully amplifier stage. More about that balances well. The weight of the proportional, located on top of the later. transmitter is one pound, twelve case, easily reachable with the index Let's start at the beginning, with ounces for the four-channel ver­ fingers. the encoder. It uses some time- sion. and one ounce more for the The trims are mechanical, and, as proven Kraft circuitry; an integrated six. is traditional, located under and circuit shift register and pot­ The more-or-less normal RF out­ inboard of the stick function that switching transistors to generate the put meter is located on the front, as they trim. necessary sync and control pulses, is the O N -O F F sw itch, w hich is Circuitwise, the Kraft Sport Series which are then fed to the modulator protected from accidental opera­ transmitters are interesting, in that and eventually the RF section. The latter starts off with the usual half-frequency oscillator, going then to a buffer-doubler, at which point the modulation is introduced. The final amplifier, the FET men­ tioned, is one of a class of new D- MOS devices, which exhibit high gain and efficiency, and in this case, adequate RF power output at low voltages. Would-be technicians and tin- kerers are reminded that FET’s are not to be tested with an ohmmeter in the manner that a go-no-go test can be made on normal transistors. Under the conditions used in this Eloy used a Hobby Shack "Shefl Fly 20L", powered by an HB 25, to test the Kraft unit. Radio transmitter, the FET will run warm to passed all tests with flying colors. the touch, but not uncomfortably so. However, if an internal short does occur, a higher current will flow which will generate enough heat in the FET to burn flesh. If the transmitter does fail, and you MUST work on it, be careful! The antenna coupling is also of the old but dependable type, as is the metering circuit, which reads RF output (not battery voltage). A nominal RF input power of 700 milliwatts is claimed. The current drain is listed as 120 MA; the unit under test measured less, though no appreciable difference was noticed in either output power, as com- The radio installation in Eloy's Shell Fly. The Kraft unit is not supposed to be a "miniature" system, yet there is more than enough room in a .25-size airplane. Continued on page 102

NOVEMBER 1978 61 The author made a good choice when he chose the Craft-Air Windrifter and Mark's Models Windward as his first attempts at R/C sailplanes . . . either model makes an excellent trainer. Both of Jim 's models are finished in black and transparent yellow Monokote. fr o m POWER TO S i kd^iqk By JIM K ITC H E N . . . A “ fireside chat" in which the author shares his experiences of getting into R/C soar­ ing after over four years of power flying. Familiar to the soaring pilot, and useful advice for the novice. • After more than four years of enced soaring pilot, and provide that have been straining to keep her building and flying powered some useful advice to the novice. in sight, and suddenly, you have lost models, I gave sailplane modeling a her. Panicsville! Visions of your try, and guess what? I enjoyed it! I WATCH OUT FOR THAT LAST DOWNWIND TURN model and R/C gear gone forever don’t mean that I then sola off all my race through your mind. In your engines and powered models at the It's a beautiful spring day. Lots of blue sky with a scattering of fluffy panic, you keep staring at the last next Club Swap Meet. To me, sail­ point where you saw, or thought planes are a logical extension of my white clouds. Plenty of thermal you saw your model, hoping that it R/C building and flying skills. My activity. You’ve hooked into a good will miraculously reappear. If you thermal . . . not a boomer, but a sailplane is another option to con­ keep your wits, you will probably sider when selecting models for respectable one that continues to give you altitude, as your orbiting pick it up again, and this time head those weekend flying sessions. for home, post haste. Soaring’s leisurely pace gives my sailplane drifts downwind until it isa reflexes a respite from keeping up mere speck in the sky. Your good One thing you can do to avoid with my latest .40-powered ship. My sense tells you that it is time to crank such a disaster is to enlist the help of sailplane flying has been limited to in down trim, straighten her out, any others present (except those thermal soaring, because of spo­ and head back towards the field, but who may be flying at the moment), you decide to make just one more and keep a pair of binoculars handy. radic winds ana the lack of suitable full circle. Part way into the turn, as The best solution is to get as many sites for slope soaring here in the she heads away in that most difficult eyes peering in the same direction flatlands of California s Sacramento Valley. As a Civil Engineer, I find the seeing attitude, you blink those eyes as possible .. . especially children. challenge of trying to defy the laws of gravity particularly enjoyable. I don’t qualify as a sailplane purist, because I normally use a power pod to gain my initial altitude. I chose a Mark’s Models Wind­ ward as my first sailplane, and con­ structed a power pod using a Cox .049 Black Widow engine to do the launching chores. I am a lazy build­ er, in that I prefer to build from kits. My building disposition dictated that my first sailplane model should be a 72-inch span kit. Some of my reasons for selecting the Windward were: (1) highly recommended as a trainer, (2) well-proven design, (3) reasonably priced, (4) quality materials, and (5) scale-like appear­ ance. Subsequent experiences have proven my reasoning to be valid. I would like to share some of my experiences with you. They will Instead of a winch or hi-start, Jim uses a power pod to climb to altitude. Pods are made from have a familiar ring to the experi­ 1/4-inch balsa laminated between 1/16 ply. then covered with polyester resin or epoxy. 62 MODEL BUILDER because their youthful eyes are stronger than those with many years of wear. Also, they may look in the wrong place, which just might be where your sailplane will turn up. The moral of this story is, “When you decide to make just one more downwind turn, don’t!” I know, because I have been there several times. LOCATING YOUR DOWNED SAILPLANE This is a variation on the preced­ ing theme, and it is more likely to happen to an inexperienced pilot. In my case, I believe that it was a range problem, caused by either low batteries or a frequency change using plug-in crystals, that did me in. Same situation as just described, Jim keeps two servos in each glider all the time. Then, if he gets tired of flying one model, it except that when you try to straight­ only takes a few minutes to switch the receiver and battery from one model to the other. en her out to head for home, you can’t seem to find the right com­ bination of control and visibility to assure yourself of a home-base heading. Your maneuverings be­ come more frantic as you try to cope with this new crisis, and you catch fleeting glimpses of the model slow­ ly settling to earth. When it becomes obvious that you are not going to make it back to the field, you should immediately start looking for some landmarks to use in locating the downed sail­ plane. Two points along the ap­ proximate line of last sighting are what you really need; one fairly close in, and the other beyond the downed model. When tnis hap­ pened to me, my sights were a telephone-pole at about 300 yards, and the middle of a quonset hut about a mile away. I used these two landmarks to sight along until I walked past the pole, ana then I used the pole and my car parked at All eyes are on the Windrifter as the author launches her for her first powered flight. Tom the flying field as a back sight to Vincent, just to the left of Jim, handles the transmitter. continue on the same bearing. I carried my transmitter, and when I approached the area where the model went down, I stopped every hundred feet or so to cycle the transmitter control stick, while lis­ tening for noise of servo movement. Call it luck, but twenty minutes and about a half mile later, I stumbled onto the sailplane, completely intact. This method may not work fór you if your flying site is surrounded oy a built-up area. Buildings and fences may discourage you from tracing a line of sight , but keep it in mind, and do the best you can. It is a good idea to have your name and telephone number on your model, so if it comes down in somebody's back yard, they can contact you. Windrifter wings under construction. Note the absence of balsa dust and spilled glue on the bench . . . sure makes us balsa butchers look bad! Continued on page 121 NOVEMBER 1978 63 The first electric-powered seaplane to ROW was this twin Astro .15 design by Neil Whitman. The 7-lb. model had poor water handling and flight characteristics, led to the improved version shown at right. ELECTRIC POWER

By MITCH POLING Z' • Suddenly, electric flying is worth the show! The requirements should very good , and should come out at 8 cash prizes! The International Mod­ keep the planes light and slow oz. with the Monogram unit and eler Show, to be held January 6 and flying. There is also a category for Ace Baby R/O. It has a 36-in. span, 7, in Pasadena, California, will have Ughter-than-air models, with the and 2 sq. ft. of area. The Comet 50- indoor R/C record trials, based on greatest distance covered determin­ inch Taylorcraft has been flown duration around a figure-eight ing the winner, wen) The usual indoors with R/C and CO 2 power course. The longest flight time in weights for my planes with the (twin Brown unit), and has been each category is worth $150, and the Monogram unit (equal to an .010) rlown outdoors as a free flight by longest flight time of all the cat­ are 8 oz. with an Ace Baby R/O unit, Tony Naccarato, with an Astro 020, egories (CÖ 2, electric, and rubber) is and 10 oz. with the Cannon super­ so it would be a candidate, too. Have worth $250. That's enough to make mini two-channel. The Astro 020 at it, and let me know how you do! things interesting! The tentative planes come out at 12 oz. with the Photos are always welcome, and any wing loading of a maximum 4 oz./ Ace Baby R/O, and 14 oz. with the type is just fine, from Polaroids to sq. ft. is low for electric power, Cannon super-mini two-channel. color prints. The magazine uses only though it can be done. The models Ken Willard designed and flew a black-and-white prints, but photog­ will have to be large, from 2 to 4 sq. rudder-only indoor R/C model raphy is also a hobby of mine, and I ft., to accommodate the weight of twelve years ago, called the Gym can convert most photos to black- the R/C equipment and electric Dandy, using the Cox .010. The plans and-white, so no problem. units. (The indoor R /C record trials are available from RCM , set no. 163, Neil Whitman has been flying rules are stiff because of the flying for $1.00. Ken was, as usual, far electric seaplanes since the spring of site . . . the exhibition hall, during ahead of his time. The design looks 1976. As far as I know, he is the first

No, this is not a powered glider that didn't quite make it back to the field, it's Neil Whitman's beautiful Astro 15-powered seaplane. Like most of his models, it has a fiberglass fuselage. Weighs 4-1/2 lbs., flies great.

64 MODEL BUILDER Neil Whitman's much improved twin Astro 15 design uses a wide fuselage instead of tip floats to maintain stability on water. Neil uses a 20-cell motor battery instead of the usual 16-cell pack. Model was flown at the 1977 Brimfield Spring Meet. to ROW an electric seaplane. Neil is an excellent craftsman, and his planes show it. The fuselages on all his planes are fiberglass . . . very impressive! The twin Astro 15 plane in the swimming pool ROW'ed on the 24th of May, 1976. It weighed 7 lbs. and was sluggish in flight, with poor water handling. Neil built an improved twin 15, which handled much better on the water and in the air, and flew it at the 1977 Brimfield Spring Meet. It uses a 20-cell pack (24 volts), up four cells from the usual 16-cell pack (20 volts). Its flying weight was 6 lbs., 11 oz. Neil does not say, but I would guess that it used 7 x 4 props, instead of the 8x4 props used with a 16-cell pack. The twin 020 flew in 1977, tracks beautifully on step, and will ROW (marginally). It weighs 38 oz., has 371 sq. in., ana flies well. The single Astro 15 on the pond is new (as of the spring of 1978) and handles very well, both on the water and in the air. This is certainly a good-looking airplane ... it inspires me to try one like it. It looks like it would make a good design fora full- size plane, too. Neil points out that it has only rudimentary tip floats, just enough to keep the wing out of the Another of Neil Whitman's designs is this twin Astro 020 flying boat. Again, no tip floats are water, and that his other planes have used. Model flies well, ROW is marginal. none at all. He has found that tip floats keep breaking off, and are not really needed. The plane weighs 4 lbs., 9 oz., and uses a 20-cell, 550 mah pack. Again, Neil does not sav what prop he uses, but it is probably a 7 x 4, not the 8 x4 usually used on the 16-cell pack. This is because in­ creased voltage will cause increased current, if the same prop is used. This can quickly cause overheating and armature burnout or brush damage. A smaller prop decreases the load A fresh-out-of-the-mold fiberglass shell for the model shown directly above. Neil is a real crafts­ man with fiberglass. Continued on page 127 NOVEMBER 1978 65 In this photo the engine C.G. has been moved to the right of the car Moving weight to the left is helpful in an oval car. Forward weight centerline. Radio battery was also moved to right. shift will be explained in next tech article.

TABLE I R/C AUTO NEWS Side 'g\ cornering* By CHUCK HALLUM PHOTOS BY AUTHOR Front Rear Car I (60/40) .56 .74 • For the first time in many moons, the rear wheels, so that power and Car II (55/45) .62 -Ο­ I'm going to get technical. The topic Car I +2 oz. in front .79 ΤΙ traction forces can be delivered to .64 is weight distribution. We are going the ground. But acceleration and Car I with C.G. .12 lower .60 to cover axial (fore and aft), lateral cornering can alter the relative "Under hard forward acceleration. (right or left of centerline), and weight on each of the tires... as can vertical (up and down) center of aerodynamic forces, when the car is gravity (CG) effects. You have prob­ moving fast enough. constant-velocity turns and effects ably experienced most of these Initially, we will neglect the aero­ of toe-in/out, and car aero­ effects, but didn’t know why. Maybe dynamic forces. It will help if you dynamics. Well now, let’s throw in some of my comments will be help­ have read my earlier articles on tires forward acceleration and see what ful. I’m trying to get this done before and weight distribution, and also my happens. Drag/Funny Cars at 4.5 lbs. the 1978 ROAR Nationals, because article on drag cars. (For copies of can accelerate at an average of 1.3 some of the thoughts and ideas may past articles, write to Chuck Hallum, g’s, and have a maximum accelera­ be helpful to me at the Nats. I always 18276 Foxglove Way, Irvine, CA tion of probably about1.6g’s. Hence, find that writing about a subject 92715. Send 20

WEIGHT SHIFT (TOTAL FRONT & REAR)

FIG . 3

66 MODEL BUILDER limit is at least equivalent to the maximum Drag Car “g” accelera­ tion (that is, for a full weight shift to the rear wheels). So tne rear tires have an overall traction limit of about (4 X 1.6) 6.4 lbs. For a 1.2-g forward acceleration, a 6-lb. force is used, but the vector force difference (see Fig. 1) means that 2.23 lbs. are available for cornering. At the front, the maximum traction of about (1 X 1.6 x .7) 1.12 lbs. is all available for cornering. Flowever, the equivalent mass of the front is 2 lbs., and the rear 3 lbs., so that the rear cornering "g ” limit is (2.23/3) .74, while the front side “ g" limit is (1.12/2) .56 g. Lo and behold, the front will begin slipping first, giving power understeer. This is fairly correct at relatively low speeds, before aerodynamics begin to take effect. Now, if thecarwasdrivingthrough the corner at a lower forward acceleration (.6 g) equivalent to a .5-lb. weight shift, things would be much different. The total rear trac­ tion capability is now about (3.5 x 1.6) 5.6 lbs., forward force is 3 lbs., and side force availability is 4.73 lbs., giving a rear side "g” capability of 1.57 g’s. At the front, total available side force is (1.5 x 1.6 x .7) 1.68 lbs., and the side "g” capability .84g. The car still understeers under maxi­ mum cornering conditions, but it Fig. 4. For a given slip angle, a tire's cornering ability increases with the weight on it, turns a lot faster. but not in direct proportion; it peaks and falls off with further loading. Braking makes the front of the car bite even more. Assume a .6-g TABLE II deceleration with a .5-lb. weight TIRE LOADS (lbs.), STATIC & .8g TURN shift forward. The rear side force Centerline C.G. 1" C.G. Shift to Inside available is about 2.65 lbs. for .88 g, and the front side force is 2.8 lbs. Tire Static ,8g Turn Static ,8g Turn for 1.4 g’s. The car can now oversteer Inside front 1.0 .6 1.25 .85 and possibly spin out if we have the Outside front 1.0 1.4 .75 1.15 front wheels turned far enough. Inside rear 1.5 .9 1.875 1.275 What the above exercises have Outside rear 1.5 2.1 1.125 1.725 shown us is that, on a high-traction track, understeer can develop dur­ TABLE III LATERAL WEIGHT SHIFT EFFECT ON ing acceleration. If you really have a CORNERING ABILITY (COASTING). super engine and it is geared right, you may be able to induce power Item C.G. Front Rear oversteer to help turning. What else Location Inside Outside Inside Outside can you do to the car? Of course, ,8g Load .6 1.4 .9 2.1 you can go to better-bite front tires (X500X1.33) (X500X1.33) (x500) (x500) . .. but we’re on the subject of CG. Equiv. 1:1 load 400 933 450 1050 (fig. 4 X .7) (fig. 4 X .7) (fig 4) (fig. 4) So let’s shift the weight forward a Side force, 1:1 319 518 495 780 little so we have a 45%-55% distri­ (12° slip) (500x1.33) (500x1.33) ( 500) ( 500) bution; 2.24 lbs. on the front and Side force, Vi .48 .78 .99 1.56 2.75 lbs. on the rear. Let’s call it approx, 'g' 1.26 63g 2.55 •85g Car II. ,8g Load 1" inside .85 1.15 1.275 1.725 Assuming we can accelerate Car II Equiv. 1:1 load 567 767 638 863 at 1.2 g’s, the weight transfer will be the same, so front tire down force Side force, 1:1 399 473 620 715 will be 1.25 lbs. and rear down force Side force, Vi .6 .71 1.24 1.43 3.75 lbs. Rear tire traction capability 5 & approx, 'g' 1.31 .66 2.67 .89 is (3.75 X 1.6) 6 lbs.. . . and all of this is used for acceleration, NOT corner­ ozs. of car weight to the front has power oversteer can be induced, ing force. Meanwhile, at the front, resulted in a power oversteer condi­ and some people can handle it . .. side force capability is (1.25 x 1.6 x .7) tion under hard acceleration. It’s probably not me, though. 1.4 lbs., and maximum side accelera­ amazing what little weight shifts can Now, let’s add 2 ozs. of weight at tion is about .62 g. So, just shifting 4 do. The thing about Car II is that Continued on page 132 NOVEMBER 1978 67 8

The ingredients of the E-Z Vee project: the E-Z Vee fiberglass hull, K&B outboard, Hobbypoxy Jerry Dunlap displays the NAMBA record hol­ Formula 3 glue and P.F.C. filler, and the Hughey Boats outboard engine mount. der for the straight 1/16 mile at 31 mph.

• If you thought building an R/C Coast boaters that it gives Ron the brilliant metalflake deck, which boat was a long winter project, then Erickson good competition in class is available in several popular colors. I have news for you. The E-Z Vee A. The boat I reviewed weighed in at 2 designed by Jerry Dunlap is a pleas­ The boat is manufactured by R/C lbs., 2 oz., which tells me that the ant change of pace. It can easily be Glass, 1628 Corona, Medford, Ore­ glass resin and cloth were not layed completed in two evenings, as either gon 97501. The $55-dollar price tag is too thick. The light weight should an inboard or outboard version. very reasonable, considering tne result in a storming hull. Oh yes, Why not try an E-Z Vee for those fall fine quality cloth lay-up and overall don’t forget the lap strakes on the regattas? neatness of the shipped product. hull for added lift and speed. The The E-Z Vee was first run by Jerry a The deck and hull arealreadyjoined. corners are sharp for clean running couple of years ago in a plywood I especially liked how carefully and and require no improvements. This version , powered by a .40. The latest accurately the hull and deck seat is very unusual on a glass hull. addition is a fiberglass version mea­ together. A plywood doubler is CONSTRUCTION suring 25 inches long and 11 inches installed in the transom to give The builder's first job is to decide w ide. It is the current N A M BA added strength for mounting hard­ what powerplant to use. I chose the record holder in class A outboard ware or the K&B outboard. To add to K&B outboard, which is one of the DV for the straight 1/16 mile, at 31 the good looks of its clean lines, is most popular engines in R/C boat- mph. In this class, outboard engines must remain stock, so this hull promises to be quick. I haven’t seen it set up with the inboard version, but I understand from the West

Out-of-the-box hull is excellent, requires no Young Jimmy Preusse with the finished boat. The bolt-on engine and ready-made fiberglass touch-up. Lap strakes have sharp corners. hull would be an easy and quick way to get started in R/C boating.

68 MODEL BUILDER ing. I made two modifications to the engine to increase the power. First, I carefully enlarged the exhaust port at the end of the lower unit with a Dremel hand tool (do not change this port if you plan to run it in stock class). Secondly, I removed the exhaust throttle and also installed a K&B .40 carburetor. The barrel opening has been reduced with 2 undersized pieces of Perfect brand tubing. This will allow you to find the proper needle setting and fuel draw. Also, the spray bar has been extended across the opening, to help cut down air draw. If these Test runs at Lombard, Illinois, showed a JG E-20 prop to be the best for this boat. At full throt modifications do not work for you, tie, very little of the hull is in the water. remember, don't blame K&B. of the boat under the deck. Nylon when the engine mount is at its Next, I made a plywood tray large keepers are used on both ends of highest adjustment. From this enough to accept a standard 3x4- the throttle, as well as the rudder extreme, the engine can be lowered inch G&M Models waterproof radio linkage, to help absorb noise. about a 1/2-inch, right at the pond. box. The tray has four 1/16 plywood I used a Sullivan 6-oz. flat oval fuel The mount is complete with 4-40 cap sides and bottom. The depth mea­ tank. The tank is mounted about 3 screws, and is a must for outboard sures one inch. The bottom extends inches from the transom on a 1/16 enthusiasts. I also used a Hughey 3/16 of an inch on the long side plywood platform, complete with Boats left-hand outboard arm for ends; this is to accommodate the four screw-eye hooks for rubber the rudder linkage, which mounts to 3/16 spruce stringers which support bands. Again, use polyester resin the crankcase of the outboard. Its four screw-eye hooks for the rubber and cloth to mount the fuel tank height is also adjustable, so that bands, which hold the radio box in tray. when you adjust tne outboard, you the tray. (If you build an E-Z Vee, be To mount the K&B outboard, I also adjust the arm. In this way, you sure to leave some clearance when decided to use a Hughey Boats do not have to change your linkage. measuring the side pieces for the Outboard Engine Adjustable My rudder linkage passes through a foam padding around the base of Mount. I mounted the plate so that small hole in the transom, so you can the radio box. You must have a foam the prop hub is even with the "keel understand how helpful the Hughey insulator to absorb vibration and noise.) The tray pieces were glued to­ gether with the new Hobbypoxy Formula 3 thixotropic epoxy glue. Formula 3 is packaged in 2 four- ounce cans, and is mixed at a one- to-one ratio. Working time is one hour, and it will cure overnight. This glue works great on vertical surfaces and thin edges, because it is formu­ lated to a gel-like viscosity that doesn’t run. As with all epoxy glues, be sure to havegood ventilation. For more information, write Hobby- poxy Products, 36 Pine Street, Rockaway, New Jersey 07866. Next, secure the tray in place with 2 one-inch-wide fiberglass cloth strips and polyester resin. The tray should be centered over the center- Engine and radio installation details in Jerry Dunlap's inboard version of the E-Z Vee. K&B .21 line, approximately 6 to 7 inches uses an International Products tuned pipe. Just as competitive as the outboard version. from the transom. It is recom­ mended that the area of the hull to be resined be roughened with coarse sandpaper for better adhesion. Because my throttle output arm exits the front of the radio box (set up for conventional boats), I in­ stalled a Du-Bro flex-cable throttle linkage. The nylon liner is resined to the lower left-hand side (out of the way) and is routed through a piece of brass tubing which was bent into a half-circle with a 4-inch diameter. The end of the tubing closest to the radio is glued into a small hardwood Jerry's E-Z Vee inboard is a real movin' machine, as can be seen from this photo. Even though riser, which was resined to the floor it's a deep-vee design, the boat does not do too well in rough water. NOVEMBER 1978 69 arm is. Next, install an antenna, fuel line, trim plates, and a few decals or numbers. You’ll want to build a stand that supports the E-Z Vee and also holds the outboard engine rigidly in a neutral position. This prevents wear and tear on your servo when starting. TEST RUNNING Before I forget, my set-up balances 6 inches from the transom. In our test runs, we found a JG E-20 prop to work very well. At full throttle, only the last one or two inches of the vee is in the water. The boat was somewhat unstable, so I lowered the engine about a 1/4 inch via the adjustable mount. Now the boat was quick and stable Details of Chuck Gray's Excaliber with the cowling removed. Note the watertight radio box through the corners. With the and K&B Auto Trim . . . a must for maximum performance. engine depth about right, I began with minor adjustments on the trim plates. I must say right here that this boat does move, and it is downright fun to drive! I highly recommend the E-Z Vee for a beginner, or the pro who needs some fun again. · EXCALIBER II by JERRY DUNLAP • This combination R/C Power Boats column and PRODU CTS IN USE report is rather unique to me in two ways. First, it is the first time in 10 years of reviewing model boats that I’ve reviewed a boat that I designed. Greg Roth's Excaliber breaks loose. Didn't flip. Secondly, it’s the first time I’ve ever had one of my designs, the E-Z Vee .21, reviewed by another writer. Bob Preusse. I talked to Bob about com­ bining our reviews, since both boats are my designs and both are avail­ able from the same source; R/C Glass, 1628 Corona, Medford, Ore­ gon 97501. Bob was most agreeable to the idea of lumping both reviews into the same article. However, prior to my portion describing the Excaliber II outboard tunnel. I'd like to mention what I’ve done with one of my E-Z Vee ,21’s. Although Bob is reviewing this boat using an out­ board power package, the boat also Another shot of Greg Roth's boat, doing what it does best. Clean hull design leaves very small works well with an inboard .21-size wake. engine. I have been using a piped K&B .21 in my E-Z Vee .21, and have been fairly successful in racing the boat this season. Halfway through our District 8 racingschedule.my E-Z Vee .21 was leading in both the .21 Deep Vee Class and the .21 Mono­ plane class. Actually, it was leading in the enduro racing and heat racing phases of .21 class racing. However, I must say that the boat works much better on calm water than it does on choppy water. It never was intended to be a rough-water Vee design. I call it a Sprint Vee, since it works better in sprint events than rough- Dennis Caines' Excaliber has lots of detail for a really authentic appearance. water events. But enough about the Vee boat, I’m supposed to be telling

70 MODEL BUILDER you about the Excaliber II tunnel outboard. The Excaliber II is a modification of the original Excaliber tunnel boat that was designed by my friend Dave Knowlen, in February of 1977. Dave is a well-known designer of full- scale racing boats, both limited and unlimited. The original Excaliber was featured in the November 1977 issue of R/C Sportsman. I ran the original for five months and then, just prior to the 1977 NAMBA Reno Nats, I decided to reduce the size of the boat. This proved to be a very successful modification, since the new boat, which I dubbed Recali- bered, went on to win the NAMBA Nats, our District 8 Championships, and set an oval course record (since broken). It was also during 1977 that I met Vic Drew, owner of R/C Glass, and saw some of the fiberglass boats he was making. Vic told me he was looking for a new tunnel design to Super-neat Excaliber II belonging to Tim Harvery.of New Westminster, B.C.. Canada, complete market, and I figured I had some­ with trailer. Excellent cockpit detail. One of the prettiest little boats we've seen yet. thing he could use, so we got to- . gether and I turned over to Vic both the outboard tunnel and the little Deep Vee. Vic redesigned the cowl­ ing for the Excaliber II to reflect a full-scale outboard tunnel cowling. The Excaliber II has now been avail­ able since the first of the year, and has become the most popular fiber­ glass kit here in the Northwest. I have been very pleased with the quality of work Vic has been doing on the boats. The Excaliber II is not really a kit at all. The top and bottom hull parts come seamed together. The boat can be purchased in three versions: white gel-coat, for $79.95; metalflake top, white bottom, for $84.85; andall-metalflake,for$89.95. The metalflake versions are heavier than the gel-coat hulls; however, no painting is necessary with the metal­ flake versions. Also included with the boat are material for a built-in radio box and a complete set of directions, with lots of photos and running information. Writing the directions for the kit was another At the 1978 NAMBA Nats, Myrtle "Mom" Coad, NAMBA Ex. Sec., with the $325 collected first for me. The directions are very from the Paul Schumacher Memorial Fund raffle, and Futaba radio won and then auctioned Continued on page 129 off by Jim Fitzgibbon (left). Sid Broughton, 78 Nats CD, on right.

Jerry Dunlap (left) and Vic Drew, with Vic’s Racing action between two Excaliber Il’s, just prior to the start of a heat race. Tom Dudley's Excaliber II. Placed 2nd at R/C Boat Champs. boat on outside, Mike Might's on inside.

NOVEMBER 1978 71 Prem'tiliiift . STERLING MODELS’ BIG BEAUTIFUL “Mk. II” Puddle Jumper R/C Air Boat/Amphibian for .15-.35’s

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Designed lor 2 channel R/C or tether control and .15 to .35 engines. Maintaining top quality and simple con­ struction. All Balsa and Plywood parts are accurately die-cut, with precision vacuum formed Plastic hull and cabin. Hardware package including R/C hardware. Full sized Plans, plus Decals lor Sport model or Coast Guard version.

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NOVEMBER 1978 73 absolutely no shame whatsoever, the remainder of this column is turned over directly to Chuck, for his description of the 50/800 Western Divisional Championship. All photos should be credited to Chuck, as should our thanks for his assistance to those of us interested in the development of the 50/800 class. M AG IC DRAG O N BEGUILES 50/800 WESTERN DIVISIONAL CHAMPIONSHIP “The ‘newcomer’ design from (he mid-west was very impressive! Terry Allen sailed the first MAGIC D RA G O N on the west coast in a masterful way against some of the best skippers. A large number of either new 50/800 models or modi­ fied models were in thecompetition. Twenty models entered the Western Divisional Championship Regatta. Each skipper sailed 72 long wind­ ward-leeward courses in typical spring wind conditions . . . 8 to 17 knots. “Many of the skippers' models had never participated in a formal regatta; however, it was obvious that each was very pleased with his creation. Chuck Black, Bob DeBow, and Ritch Ritcheson sailed the new TEMPEST, which resembles the ORION in the forward sections, with a full after section like the EPIC, lack Thomas sailed a modified ORION. This model had a fuller departure instead of the flat garboard-to-keel span in the after six inches. The BLACK MAGIC model sailed by Paul Black was Featured in this month’s article, the "Magic Dragon", pressed to weather, resists pitching for­ designed by Bruce Nelson, who is an ward, lee bow wave helps pointing ability by pressing on port bow. upcoming IOR designer. This model has a very flat section from bow to stern along the keel, and was probably the lightest model entered. Then there .was the MAGIC DRAGON, which was created by Ray Ozmun, from Sandusky, Ohio. This model placed a very close second in the 1977 AM YA 50/800 ACCR, in Indianapolis, Indiana. • Back in July, 1974, these pages shapes, from the slim LIBERTY 76 to Although this model did well in the provided a comprehensive look at the buxom AQUILO. Weeven heard mid-west, it has never seen action the state of the 50/800 Class. With from "down under”, and published here in the west. boats from both the Potomac and in MB the lines for the powerful "It was obvious from the begin­ Delaware Valley MYC making up SONIC BOOM. ning that the MAGIC DRAGON, the preponderance of the fleet, the What are the latest trends in this sailed by Terry Allen, was the model 1974 version of the Carden State popular class? Little technical infor­ to beat. The model did rather well to Regatta provided a good bench­ mation is forthcoming from the weather, but was much better off mark for the class. The regatta has AMYA Quarterly. Those pages are the wind. In general, the MAGIC been held in all succeeding years, used instead in fueling the fire of a DRAGON opened on all legs to though the name is now THE squabble over whether American where it had a convincing lead at the COLONIAL. As model yachting model yachtsmen should affiliate finish line. Although Terry swept spread over the country, further with IMYRU, or some other paper first place in all his heats, there were developments in the class were tiger. several heats where his opponents natural. Some folks imported boats, Just when things were looking had a bit of bad luck. such as the M O O N R A K E R from their bleakest, the postman brought “Alvin Smith, (he ’77 Western England. Others applied themselves a gift from the golden west. Chuck Divisional Champion, also sailed to published designsliketheBAMBI, Black, who continues to make un­ impressively, but on occasions had and built from the ground up. A selfish contributions to our sport, some problems which prevented succession of home-grown boats provided us with just the snapshot of him from beating his competition. appeared that ran the gamut of 50/800 activity that we needed. With One of his problems, as well as 74 MODEL BUILDER dusky, OH 44870. I don’t have price information this month, but hope to have it next month. I'm sure a letter to the SPORT, CYCLE folks will get you all you need. In response to a number of re­ quests, tne following is a partial list of AMYA sanctioned model yacht clubs. Contact the fellows listed to find out where, when, and what is being sailed.

Naragansell MYA Barbara Ryan Seven Mile Rd. Hope, Rl 02831 H.M.S. Bishop Bob Danks Box 1026 Bishop, CA 93514 Salisbury MYA Fred Frey 21 Deer Lane Hicksville, NY 11801 Dupage County MYC Jeffrey C. Cros Bow slightly low on run, mast rotated 45° 615 N. Center St. Western Division 50/800 champ Terry Allen from slack rigging. Naperville, IL 60540 and "Magic Dragon." others, was making the decision as Potomac R.C. Sailing A. Sacramento MYC to whether to use the standard rig John Huson Bill Robinson or shift to the short rig, when the 4604 Monterey Dr. 4416 Elizabeth Ave. wind conditions picked up to 75 to Annandale, VA 22003 Sacramento, CA 95821 20 knots. Terry Alien had no such Iowa M YA Bluegrass Open Yacht S. problem, because he only had one Ed Niles Edward R. Tassman 4229 65 St. 4848 Bellevue Ave. rig . . . 70-inch luff. Although there Des Moines, IA 50322 were times in which the wind peaked Louisville, KY 40215 around 2 0 knots, he handled it well. Continued on page 138 All in all. the racing was clean, the competition very keen, and each skipper came away with a better idea of his model's capability. There were reports that some models were being completely rebuilt on Mon­ day morning!!!” The results are as follows: 1) Terry Allen (Magic Dragon) 2) Alvin Smith (Orion) 3) Chuck Black (Tempest) 4) Bob DeBow (Tempest) 4) Don Prough (Epic) 5) Byron Sansom (Bingo) 6) Jack Thomas 7) Lionel Goodman 8) Andy Littlejohn 9) Bill LeBoeuf 10) Franz Obrikat 11) Tod Ryder 12) C. Fondacaro 13) Barbara Ronce 14) F. Ritcheson 15) Don Huckaby 16) Paul Black 17) Dave Elliott 18) K. Grunewald 18) Jack Kallin I I hope to provide a table in next month’s column which will give all the pertinent dimensions for the boats discussed, as well as sources for hulls and other information. The M A G IC D R A G O N is obtainable from SPORT, CYCLE AND HOBBY Deep fin-and-bulb keel of minimal area promote stiffness without excessive wetted surface. Ray CENTER, 1801 E. Perkins Ave., San- Ozmun, Sandusky, Ohio, designed it. NOVEMBER 1978 75 HANNAN'S HANGAR ...... 77 PEANUT IKARUS IK -2 ...... 79 F/F S C A L E ...... 32 FREE FLIGHT ...... 86 PAZMANY PL-4 A JUMBO SCALE 90 C/L AT THE 1978 N A TS ...... 94

Tom Nallen, Sr's Focke-Wulf "Rtosser" an its "one-way" flight at the premier F.A.C. (Flying Aces Club) Nationals. Ship was lost in a thermal. More about the F.A.C. Nats in Fernando's column, F/F Scale. to World War 1, but no traces of them appear today. Also, a few American copies were produced, but they too, seem to have vanished completely. During the heyday of these machines, E. R. Armstrong, Technical Editor for the early AERO magazine, marketed plans for a pseudo-Nieuport. Copies of these were in the collection of the late William Fleming, a well-known model builder ana plans draftsman. It is our understanding that the Cole Palen craft was largely based upon these drawings, with additional information from the German Rosendahl deliniations. Palen has chosen to power his monoplane with a two-cylinder Aeronca engine, which is capable of Aviation histery repeats itself . . . again. swinging a large diameter prop similar to that or the original. Constructed in Florida, the Nieu- • History is a dull subject to many people, but certainly not to scale model builders or constructors of full-size reproduction aircraft! We are pleased this month to present a photograph of another project de­ signed to bring history to life. Leo Opdyke, Editor/Publisner of World War I Aeroplanes, forwarded this photo of Cole Palen’s Nieuport Monoplane repro, which bears a similarity to the one in our masthead logo. Although the name "Nieuport” is synonomous with biplanes in the minds of many enthusiasts, Edouard Reproduction Nieuport monoplane belonging to Cole Palen, Old Rhinebeck Aerodrome. N.Y., Nieuport himself was strictly has Aeronca two-cylinder opposed engine. See text. a monoplane advocate, and the biplanes bearing his name were tiny 28 hp two-cylinder engine of port repro is now at its home base, conceived by others, after his pass­ Edouard’s own conception, reached Rhinebeck, New York. The fuselage ing away. Nieuport’s monos were speeds close to 80 mph, while an­ is pinkish-red, the wings a dirty among the most efficient types of other, pow ered with a 100 hp white, according to Leonard their era, far surpassing the perfor­ Gnome rotary, won the 1911 Gor­ Opdyke. Thanks also to Fred A. mance of most of their contempo­ don Bennett Cup race. Komlosy and Herb Kelley, who raries. One version, powered by a A few Nieuport monos were im­ supplied some of our information.

Monty Groves, Jr. makes a low pass in his Focke-Wulf "Stieglitz", featuring Swedish markings. Aircraft is powered by a 150 hp Siemens radial engine. Photo by Ken Hannan.

NOVEMBER 1978 77 READERS REPLY Every so often we toss a question to our audience, and it is satisfying to receive informative answers. Nope, we still haven't obtained the instrument panel layout of the Bellanca Trimotor Racer that Claude McCullough asked about; however, the "batting average” is high. For instance, we wondered in print wheretheterm "Big Apple,” as applied to New York City, origi­ nated. Former resident Sol Berman provided a newspaper, which yielded this account: It seems that jazz musicians who traveled the country, had a saying: “There are many apples on the tree, but to play New York City is to play The Big All-balsa Opel rocket-powered plane, by Canadian Ron Limbrick, for Jetex power. Plans avail­ Time, The Big Apple.” So there you able from Peck-Polymers. are. Here on the opposite side of the tower was built. Our thanks to Doug the annual Rhinebeck Classic meets, country, columnist jack Smith refers Gillies, who unearthed the informa­ to the most outstanding Gee Bee to California as “The Big Orange” tion from a July, 1932 MECCANO model entry. . . . perhaps because it has a-peel? magazine. AND SPEAKING OF (Bill should pay us to print that kinda JOHN CLEMENS SUPPORTS SCALE THE GRANVILLES stuff! wen) AMA Prexy John voiced this Haffke passed this story along to HANDY HINT opinion while NASA was being us, credited to designer Pete Miller: Frank Scott sez: "In order to see formed (the modeling NASA, not It seems that “Grannie” Granville, better what I’m doing while laminat­ the aerospace group!): "Everyone sparkplug of the Gee Bee construc­ ing parts, I find it convenient to ought to try one, even if just a tion team, was involved in a few last- work on a sheet of black polyethyl­ Peanut. Really not all that difficult, minute details of the R-1 racer ene (from a trash bag).” Advantages and most satisfying.” assembly. He was having problems are that the contrast between the THOSE WRIGHT BROTHERS getting the rudder hinge-pin in light-colored balsa or basswood and During a lecture honoring the place. It had slid through three of the background permit easy exam­ 75th anniversary of the Wright the four hinges, but stubbornly ination, and ot course, a glue- Brother’s first powered flight. Bill refused to budge into the last one. resistant surface for easy removal of Chana described some of the lesser- Grannie fumed, cussed, and finally, the dried parts. known products of this innovative out of sheer frustration, threw his ONE MAN’S ACHIEVEMENTS duo, based upon his extensive study hammer across the shop floor. It Most knowledgeable aviation of tneir lives. It turns out that their careened off the wheel of another buffs are well aware that Gustave ingenuity extended to their home, aircraft, bounced into the air, and Eiffel (of Tower fame) was also an which featured such advanced ideas came down through the top cover­ aerodynamicist who operated a as a stainless steel sink, central ing of the wing. No one said a word. wind tunnel and developed airfoils vacuum cleaner system, and a Someone just got a piece of fabric, during the pioneer days of flying. In specially-sculptured 3-dimensional some dope, ana quietly repaired the fact, tne Nieuport monoplanes and toilet seat! damage without uttering a sound! their airfoils were tested in model GEE BEE AW ARD form by Eiffel. But did you know that Henry A. Haffke, leading East WALT MOONEY, ENTERTAINER he also designed the mechanical Coast R/C Gee Bee enthusiast, is To fill in his idle moments when structure inside the Statue of donating a Granville Brothers not engineering, flying, designing Liberty? Eiffel conceived the sup­ Challenge Trophy. Featuring an models, and writing articles, Walt porting framework during 1884, five engraving of the five brothers, the Mooney sometimes gives lectures. years before his world-famous perpetual prize will be presented at Continued on page 106

Charley Roth's "model wall" shows divergent interests; peanuts. Doc Martin's dental assistant " B J" (sure DocM, holding Doc's walnuts, helicopter, R.O.W., Coupe D'Hiver. "Cessna AW", covered in silver condenser paper.

78 MODEL BUILDER &Β IKARUS IK-2 By WALT MOONEY .. . Here's a Golden Age fighter that made it into the early part of World War II. The long nose and landing gear lend themselves well to rubber power, but check that fin area, you II need a lot! • Two sources of information are designers of the IK-2 obtained their flew relatively well. Best times have available for a three-view of this gull-wing effect only in terms of the been on the order of twenty-five interesting Yugoslavian design. Air­ chord and thickness of the wing. seconds, which is somewhat disap­ craft Profile 242, “ IK Fighters” The spar was not bent, and as a pointing. However, there is no (Yugoslavia: 1930-40’s) has consider­ result, this little gull-winged peanut doubt that someone will build a able information, as well as a three- model is a little easier to build than lightweight version that will give view and several side views in color. might otherwise be expected. much-increased flight times. "Warplanes of the Second World The author (ole prof, or whatever The model is basically a simple War, FIGHTERS”, volume four, on other names have been hung on design and uses very conventional page 203-204, also covers the IK-2, him) expected this model to be an structural techniques. The wings and has a three-view. This model excellent flier, and easy to trim. “ Sic and tail surfaces are built directly was drawn up from this latter three- transit gloria!” It sure didn't fly right over the plans. Both the horizontal view. off the board. Early test flying re­ and the vertical tail are flat struc­ When German forces invaded vealed a nasty spinning tendency. tures. Note that the horizontal tail is Yugoslavia in April 1940, eight of Standard cure-alls, such as washing- built in two halves, and is later these fighters were still serving with out the wing tips and moving the attached on each side of the vertical the 34th squadron of the 4th fighter center-of-gravity forward, were of tail. Sand the leading edges of the regiment, and took part in the early little avail. The final solution was the tails round, and the trailing edges to fignting. This design shows some of addition of more vertical tail area. A almost a knife edge, for better aero­ the influence that the Polish gull­ piece of clear plastic was added to dynamic streamlining. wing fighter designs had on other the vertical tail, as shown by the aircraft designers. However, the phantom line, and then the model Continued on page 116

Íong landing gear on this Yugoslavian design allows plenty of room for large flying prop, which is glued up from two Sleek Streek props and a rocket nose.

NOVEMBER 1978 79 ALL STRUTS ARE MADE FROM I.IODSL RAILROAD BASSWOOD. LANDING GEAR WIRE

COWL SIDES ARE MADE

USE BALSA BLOCK FOR SPINNER, FUSELAGE PLAN VIEW. ENLARGED NOSEBLOCK, COWL TOP, -SCALE TAIL AND COWL BOTTOM. HOLLOW COWL T O R I =^-r=rr^rir = PIECES TO THE DOTTED LINES. FUSELAGE FORMERS ARE CUT FROM SHEET BALSA.

FUSELAGE SIDE STRUCTURE IS SHOWN HATCHED. RADIATOR ff y S I D E S j ^ THREE BLADES SLEEK STREAK SPINNER. 1/16 CANNON AND ACTS ' 3/16 BALSA = BOTTOM -= PLUG FOR BACK IKARUS IK -2 OF NOSEBLOCK BY WALT

WHEEL FAIRINGS ARE OPTIONAL; LAMINATE

80 MODEL BUILDER HOOK AND REAq^:°TOR PEG ARE .ol5 MUSIC WIRE. THE ^STRUCTURE IS ALL BALSA OTHERWISE, WING T IP S ARE 1/16TH SHEET.

LEADING AND TRAILING EDGE S TIC K S ARE l / l 6 BY 1 / 8 , BLOCK BALSA WING SPARS ARE CUT FROM I / I 6TH ROOT R IB SHEET BALSA TO MATCH PATTERN BELOW. PAIRINGS.

HORIZONTAL TAIL IS BUILT FLAT OVER THE PLAN USING MOTOR PEG. I/I 6TH SQUARE BALSA AND T IP S CUT FROM I / I 6TH SHEET.

THEM FROM THREE LAYERS OF BALSA SHEET.

NOVEMBER 1978 81 Pat Daily and Mike Midkiff launch their models in the final round of Ed Heyn flew his Russian S-Z Quad at the F.A.C. Nats. Both Ed and the WW-II Combat event at the Flying Aces Club Nationals. his models are excellent fliers. Beautiful flying field!

FREE FLIGHT SCALE By FERNANDO RAMOS

• On July 15 and 16, I had an en­ the Maxecuters Scale Club, out of most clubs in the country. It is counter like no other kind! I at­ D.C. The site was about an hour’s situated on a slightly rolling knoll, tended the first Flying Aces Nationals drive from Roselyn, and is situated with nice, tall, green grass. The contest, at Johnsville, Pennsylvania. in Maryland. (I'm amazed at how R/C’ers have a mowed strip for a Modelers, I can’t express in words quickly one can go from state to runway. The weather, which is the overall sensation that this partic­ state with little driving. Out here, usually windy and humid in the ular weekend had on me, but let me you can drive all day and never get summer, was absolutely perfect. give it a try. First off, I had been on out of California!) These Maxecuters During this session, I had a cnance to vacation with my family, which took really know how to live. They have a visit with some old friends (Don us to many places in the East. One of flying site that would be the envy of Srull, Stu Meyers, and Joe Carter) our stops was in Washington D.C. (I whom I had not seen for quite a certainly enjoyed myself at the while. I also met Mr. Winter, who Aerospace Museum). We stayed certainly needs no introduction, across the Potomac River, in Roselyn, along with Allan Schanzle, and Pat Virginia. During our stay there, we Daily. After the flying, we all ad­ were fortunate to be the dinner journed to one of the local eating guests of Hurst Bowers and his wife, establishments tor more enjoyable Betty. After dinner, Hurst took us to camaraderie. This turned out to be a Flyline Models, where I had the preamble of what was ahead. pleasure of meeting the other half of From D.C., we flew to Philadel­ the business, Herb Clukey. It is phia, where we rented a car and amazing what two individuals can drove to Willow Grove. We checked do with lotsof hard work and enthu­ into the Fiesta Inn Motel, which was siasm. While at Flyline, I was able to the F.A.C. Headquarters. By six pm see the condition of the four models the modelers were beginning to I had sent to Hurst. Two of the four arrive from all parts of the East. Bill models had very slight damage, Noonan, Pres Bruning,and my family which Hurst had repaired. and I headed for a restaurant for The following afternoon, Hurst dinner and a brief respite. I hadn’t and I made arrangements to go Charles Schobloher’s .020-powered Hiperbipe seen Pres for several years, so there flying with some of the members of needed a thrust change, otherwise a good flier. was much catching up to do. When

Don Srull flew his Swiss Schlepp C-3605 in Jumbo Scale at the Royal Moore with his Gee Bee model Z on left and R-1 on right. F.A.C. Nats. Model won 1st in Rubber Scale at 1978 AMA Nats. Looks like he's using geared rubber motors.

82 MODEL BUILDER Superb Grumman Bearcat by Dennis Norman looks more like a static display model than a Big P-63 Kingcobra by Russ Brown took 2nd flying model! Excellent pilot and cockpit detail, too. No word as to how well it flew. in Jumbo Scale event. we returned to the motel, most runways are bordered by the same given to conventional high-wing everyone expected had arrived, and great grass I saw in Maryland . . . cabin types, and plus points to there were many pleasant intro­ must be the water!! I wish we had unusual designs such as low-wing, ductions made. The air was filled some of that grass out here in Cali­ multi-wing, multi-engine, etc. Eacn with the anticipation of the week­ fornia, because the models survived model gets four official flights. The end. The rest of the evening (until all kinds of disasters. usual procedure is to make at least midnight) was spent visiting and There were six events flown on one official flight, then submit the preparing motors and the like, and Saturday, which included the fol­ model for scale judging. The model above all, admiring the many superb lowing: F.A.C. Rubber Scale, F.A.C. must score at least 40 points, other­ and varied modelsthat were present. Power Scale, WW-I Combat, WW-II wise it doesn't qualify as a "scale” model in the judges’ opinion. There Saturday morning was wet and Combat, plus Embryo Endurance and No-Cal Scale. The F.A.C. rules is a two-minute max, and naturally, not very en couraging, as far as if you achieve this, your model will model flying was concerned. Bill are fairly simple, with minus points Noonan and I drove together to Johnsville Naval Air Station. By the time we arrived at the field, it was hot and humid. However, by 10 am, everything cleared up and the weatner turned out to be letter- perfect for the entire day! The field was a modeler's haven ... I believe that the runways were 8000 feet long. We drove about three-fourths of tne way down and parked. The

Tom Nallen's Focke-Wulf Stosser cruising by. Model is an excellent flier . . . in fact, it flies a little too well; Tom's airplane was the victim of a passing thermal and went Ο.Ο.S.!

Here's one flier's method of carrying Peanuts Typical action during a mass launch in the WW-I Combat event. Bob Thompson, in leather hel­ safely. met. goggles, and cape, gets a head start on two other fliers. Bob is one of leaders of F.A. club. NOVEMBER 1978 83 Hurst Bowers, of Flyline Models, and Pat Daily stop to watch the action. Pat is holding his Fiat Expert tlier and master showman Bob Thomp­ G-50. Model is a fine flier, made it to the flyoffs in WW-II Combat. son kept everyone entertained . . . see text. or a broken motor, eliminates you receive more points. from the competition. After the There were so many models dot­ countdown, the models are launch­ ting the skies that it was difficult to ed at the same time. It is really an see everything that was going on. I impressive sight to see a squadron of had sent four models, but ended up models taking off in different direc­ flying only two ... I just had to take tions. The first two models down are pictures of the many splendid eliminated, while the other four models and modelers doing their wait for yet another heat. Ultimately, thing. there will be a fly-off between two The most fun events to watch are models. Rubber motors really take the events in which a mass launch the supreme test during this type of takes place. Both WW-I and WW-II competition, and many of the Combat were this type of event. modelers are pros at getting the There would be several heats for most from their motors. There is no each event, with six to seven models changing of motors allowed be­ in each heat. There is a two-minute tween heats, either. Great sport! time period for the modelers to wind their models. Failure to do so, Dennis Norman and Ralph Kuenz both entered twin-engined models in F.A.C. Scale. Dennis had a very lightly built and very neat Grumman F7F-1 Tigercat, which had direct drive ana used three-bladed props. Neat A-26 by Ralph Kuenz had a best time of On the other hand, Ralph's neat A- 32 seconds, uses geared rubber motors.

Hurst Bowers carried his. Herb Clukey's, Don In addition to his Stosser (which he lost), Tom Nallen flew this very unusual Miles pusher at Srull's, and Fernando's models from Va. the F.A.C. Nats. Model features an unusual force set-up (to say the least!).

84 MODEL BUILDER Don Srull launches his Heinket 100. Lots of low-wing models were present.

This Grumman F7F-1 Tigercat by Dennis Norman was one of two twin-engine models that showed up. Rubber motors are direct drive to the props.

When a guy does this nice a job on a model, it's just gotta fly well! Bob Bender's Taube.

26 had geared motors, a la Royal Ken Bagdon did a beautiful job on this Curtiss FIIC-2 biplane. Model is powered with a .19 Moore, driving four-bladed props. engine. Unfortunately, the model did not qualify. Each nacelle had two separate rub­ usual manner of making bulkheads, illness in the family), kept everyone ber motors driving the gears. As it which I plan to cover in another entertained with his leather helmet turned out, both flew exceptionally issue. His method provides very and goggles and black cape. When­ well, and their times were very light bulkheads. ever ne flew a model of a particular similar. Dennis’ best time was 30 nationality, he would break out into seconds, while Ralph’s best was 32 Bob Thompson, one of the two the dialect of that particular country. seconds. Both models looked mag­ dynamic leaders of the Flying Aces It was really entertaining, and most nificent, either in hand or in the air. Club (the other being Dave Stott, Incidently, Dennis has a very un­ who was unable to attend, due toan Continued on page 136

The big and small of it. Leon Bennett's Jumbo Pazmany PL-4A and Jumbo Scale Douglas TBD dive bomber by Gordon Roberts is a nice Emerson Elwell’s Dayton-Wright Peanut. Pazmany plans on p. 90. flier. Model looks to be very lightly built.

NOVEMBER 1978 85 Ed Timoco watches as Joey (did'nt get last name) launches his Coupe Bruce Kimball follows his landing Coupe at the Kingdome. Model at halftime at the Kingdome, in front of 30,000 spectators! flying at halftime was a big hit with the spectators.

By BOB STALICK

FREE FLYING AT THE KINGDOM Cashman decided to try to put his deafening chorus of boos! Stopping Thirty-thousand people, the Coupe deVille up to the ceiling . . . dead in his tracks, he looked up and Seattle Sounders soccer team, and 350 reet up. He had it wound up to saw the model floating so gracefully some crazy modelers with every­ the limit and ready to fly. There was that the just shrugged his shoulders thing from EZB’s to Old Timer rub­ some concern that it might not be and decided not to brave the ire of ber models were there at the same down in time for the beginning of the crowd. The promotion and sales time. As the first half of the soccer the second half of the soccer match manager came over with worried match drew to a close, those wild to begin. The model was launched concern written on his face . . . the and crazy guys from the Boeing anyhow . . . Past the first level seats it model was still quite a ways in the Hawks prepared their towlines ana climbed in a tight circle, accom­ air, and not coming down very fäst. rubber motors for the big halftime panied by a chorus of oohs and aahs. His question, "Is there any way that show. Just as the teams left the field, It continued past the second level he (Tom Cashman) might help it the models started heading for the and beyond the highest television come down a bit faster?” was an­ ceiling. Most of thespectatorsstayed platform at 275 feet . .. the crowd swered with a "Yes, he’s working on in their seats and watched in awe as cheering all of the way. A mere ten that right now!” the ships gracefully climbed up to feet below the highest part of the By this time, the model was almost the rafters and then settled back dome, it flattened out into a beau­ within grasp and the spectators were down to earth. Those that landed in tiful transition. on their feet. As Tom caught the the spectator areas were carefully The crowd was on its feet, now, model, a tremendous cheer went up caught and returned to their owners cheering as if a goal had just been to fill the Kingdome. Accompanied with loving care. Television camera scored. C.D. Howard Phillips looked by more applause, the members of crews from Seattle and Minneapolis at the clock; only 30 seconds re­ the flying team . . . Strat-O-Bats, zoomed in on the models as they mained until the second half was to Boeing Hawks, and others . . . left flew through the vast expanse of the start. The referees and players were the field so that the Sounders could Kingdome. Close-up cameras at the coming out of the locker rooms, and continue their game. So, what was Dome would zero in on a ship and that Coupe was still circling over­ the outcome? Well, first off, the beam it onto the huge screens for head. As the referee got beyond the Sounders won, 1-0. Secondly, the the pleasure of the folks in the goalpost, he began totoot hiswhistle hone at Howard Phillips’ home has stands. to get the match going. He was een ringing constantly, with people Near the end of the session, Tom greeted very warmly . . . with a on the other end wanting to know more about this Free Flight stuff. Probably the coupe de grace, the Seattle Seahawks want to know whether or not the free flighters might be able to stage such a de­ monstration for their upcoming exhibition game on August 17. The answer, of course, knowing Howard, was a quiet but very enthusiastic, "Yes, we'd be more than happy to do so.” I guess the moral of the story is clear; a bit of persistence and some luck, plus a smidgen of talking, and demonstrations of this sort could be staged in every big Dome in the country, and why not!? Why not allow others to be intrigued with the wonder of free flight? This photo, taken bv Joe Klause at the 1978 Lake Charles Nats, shows Phil Sullivan, of Spring DARNED GOOD AIRFOIL — Valley. Connecticut, letting go for a max in 1 /2A. Finnish M.P. 86 MODEL BUILDER You'd smile too, if you had just set a new AMA record. Kieth Martin with his helicopter. Back in the archives of the model press, there appeared this section which was developed by the Finns in the early days of Nordic flying (ever rop, genial editor, will send you a to get a bit rattled by official flight wonder why it's called Nordic?). The oodie. Only one right answer will jitters, and ROG’ing a model some­ specs on this section indicate that it e rewarded, and the one with the times amplifies the panic tendency, is a good onefor very windy weather, earliest postmark will get the prize, so Dan went to school on one of especially cold and rough-air ther­ such as a subscription to Model Dad’s (Harry Murphy) R.O.W. mal conditions. It has a rather high Builder. models, and added this feature to top camber, as well as deep and aft NOVEMBER 3-VIEW reduce his chances of the jitters undercamber. It should glide very The Loadstar causing ground loops, crosswind slowly and be quite forgiving with its The three-view this month comes launches, or short engine runs ... deep and rounded leading edge. from that very good free flight plus just plain simplifying the re­ The thin trailing edge could prove newsletter, the CIA Informer,whose lease of tne model for flight. The difficult to build, but there is ade­ pages supply me with enough mate­ feature is fully explained in an ROW quate spar depth up front for really rial to write most of this column article written by Harry and pub­ beefy structure. A capstripped t.e., every other month or so. The Model lished in the July, 1977 issue of or sheet on the back 25%, should of the Month is a design by Dan M.A.N. There is a simple "ripcord” help maintain a good rear end. Murphy, and was the winning Pay- method and a more sophisicated MYSTERY MODEL FOR NOVEMBER load model at both the 1975 and “trigger” method. Both work fine. This one was forwarded to me by 1976 Nationals. Dan snitched the Tne airplane? It’s a straightforward fellow columnist Bill Hannan. His wing and stab parts from a Com pe­ rear-fin pylon type model and flies statement "You could really throw tition Models "Eaglet” kit for the usual right-right pattern. Try it your readers a curve with this one!” starters, then scratch built the fuse­ for Payload, you’ll find it works for aroused my interest. It was sent to lage from the scrap balsa bin. He you. Bill by his penfriend from Germany, chopped a rib section from the wing A SYMPOSIUM PRIMER Benno Sabel, who located it in a plan and added polyhedral for in­ The National Free Flight Society now-defunct German model mag­ creased stability. The stab is stock annually presents its State-of-the- azine from 1957. It is a tailless rubber "Eaglet”. Art papers at the Nationals. This year model which fit a particular class of Dan gives a good bit of the credit was no different. Those who were at models, having some success on the for his model’s flight consistency to Lake Charles had the chance of German contest circuit at that time. his incorporation of a remote timer listening to some of the presenta­ Name the model, and Bill North­ release mechanism. Youngsterstend tions. mose who weren’t will have DARNED GOOD AIRFOIL - FIN. Μ. P.

STATION 0 2.5 5 10 20 30 40 50 60 70 80 90 100 UPPER 1.6 5 6.4 8.7 11.1 11.8 11.7 10.8 9.4 7.4 5.2 2.7 0 LOWER 1.6 0.5 0.4 0.9 2.6 4.3 5.3 5.7 5.5 4.5 3.2 1.6 0

NOVEMBER 1978 5.5" Th. LOADSTAR

DAN MURPHY'S NATS WINNING JR/SR PAYLOAD DESIGN: 1st AT LAKE CHARLES IN 1975 & AGAIN AT W P A F B IN 1976. WING MODIFIED FROM COMPETITION MODELS "EAGLET" STOCK STAB, ORIGINAL FUSELAGE.

-4 "

11'

- 12" 15"

i

TT

DUMMY - SEE AMA RULE BOOK FOR DIMENSIONS & OTHER RULES

88 MODEL BUILDER to make do with reading about the ideas, theories, and thoughts in the symposium publication. You can get yours direct from NFFS Plans and Publications, 20267 Northbrook Sq., Cupertino, CA 95014. The cost is not known at this time, but last year’s (a bit fatter) was $8.00. The editor is Bob Dodds, who also did last year’s edition. Besides the 10 models of the year, a special feature this year includes a dedication to the Free Flight Hall of Fame. To quote from Hardy Broder- sen, "The NFFS has now taken a new focus on the History of Free Flight, in forming the Free Flight Hall of Fame. The impetus for this project comes from George Perryman, Tony Ital- iano, and Bob Dodds, each lending his energy to the project. First thought of as the National Free Flight Society Hall of Fame, which it is not, it intendsto identify,celebrate and enshrine those special individ­ uals whose life and work have been formative in a lasting way for Free Flight Model Aviation. Future appointments, proposed to be made Bill Lovins poses with his much-modified "Cathexis" FA I ship. Bill has been working with Bill annually, will be made under the Gieskieng in developing this model from original design by Dave Parsons. Bill Wyscarver photo. direction of our Free Flight Hall of Fame Administrator, Tony Italiano, through a process of nominations from the general Free Flight frater­ nity, with selection by a specially appointed panel.” And so it goes: Some super arti­ cles, theTen Modelsof the Year,and now the Free Flight Hall of Fame. To find out who these people are, order your Symposium copy today. NITRATE DOPE, WHERE ARE YOU? Once upon a time, nitrate dope was used by all modelers. Then came butyrate, and some of the glow- powered model types defected. Then came the plasticcoverings,and many, many others defected. The fact remains that, for most purposes, nitrate dope is just hard to beat when Ted Stalick prepares his Thermal King unlimited rubber job at the 1978 BMA Scholarship Continued on page 132 Meet in July. Model was featured as 3-view in September 1977 issue of MB.

Bruce Kimball holds his Coot H LG. He has been getting 29 seconds Randy Archer, Phoenix, Arizona, took 2nd in Open 1/2Aat the in a 25-ft. ceiling gym. High time better than 32 seconds. Nats with this modified Satellite. Joe Klause photo.

NOVEMBER 1978 89 PAZMANY PL-4A By LEO BENNETT . . . Before the limits were lowered, four-foot-span-and-over Jumbo Scale rubber models were the glamerous and colossal "big guns" of rubber scale. This 56-1/2" span ship represents that category. • OK, why build it? The drawbacks The Pazmany PL-4A was designed and finally flew his full-scale ma­ are obvious; a lot of work, a lot of for the basement builder by Ladislao chine before mounting a blown materials. But stay with it; the virtues Pazmany, a California engineer. By canopy. This means that only a bent are just as real. Here is a machine using a boxy design, he helped us windshield is required onthemodel, whose flight pattern is stately, even keep the model's weight down (260 hence there is no vacuum forming lordly. She climbs slowly to about grams, ready to fly). The constant to struggle with. Even Pazmany’s seventy feet and cruises for about chord wing (370 square inches; color choice (red, white, and black) twenty-five seconds. When the prop better than fifty-six inch span) means fits in with standard tissues . . . no folds, she drifts downward for an­ that the stall starts at the dihedral spray painting is reauired. other twenty-five seconds. None of break and slowly moves outward, In snort, Pazmany nad done us the the usual dips and lurches in re­ instead of starting at the tip and then favor of designing a machine well- sponse to turbulence or motor run developing violently as it does on suited for large scale modeling. And kinks. The glide is the flattest I have pointv-wing machines. Pazmany’s this one is large. How large? Well, seen in forty years of rubber- use of a VW engine forced him into a let's put it this way. You're familiar powered scale work. Those big belt drive reduction system. While a with the usual hassle involved in wings really help. The overall scale­ nuisance for him, it gives us a nice getting the rubber motor on the rear like quality of flight is awesome; high thrust line which easily accom­ peg; the wires, bits of string, etc. On Peanut fliers actually stop in the modates a fourteen-inch propeller. this model, you reach into the middle of winding to watch this one Pazmany has also done us the favor cockpit with your fist and then go by. of scorning fillets and wheel pants, thrust your entire forearm into the fuselage, simply carrying the motor to the rear peg in your hand. Now that’s large! With the test motoryou can expect a flight of about thirty seconds. With the contest motor,she will do a rock­ steady fifty seconds at 85% allowable turns. At last October’s Connecticut FAC meet, held in a light drizzle, I was able to get an official forty-three seconds. Considering the enormous weight of water the model carried, that s not bad. Interested? Start by getting your scale presentation material together. Sport Aviation (March 1973, Vol. 22, No. 3) has an excellent article, including three-views and thirteen photos, of which two are in color. Private Pilot (Feb. 1973, Vol. 8, No. 2) has no three-views, two black and white photos, and one in color. As an alternative to the old magazine A photo of the uncovered framework reveals the very light and simple structure. One-bladed road, send four dollars to Pazmany folding prop may not be scale, but really improves performance. Aircraft Corp., Box 800515, San 90 MODEL BUILDER Diego, CA 92138, and ask for the introductory package on the PL-4A. The scale of the model presented here is one inch to five and six- tenths inches full size. Construction is a bit novel. Study those fuselage cross-sections before you start. For one thing, the idea is to use lapped joints wherever possible in the fuselage, instead of butt joints, so as to get more gluing area. Further, do not use white glue on the fuselage or on the wing center section. You must use epoxy to get the necessary strength. Use it spar­ ingly . . . the stuff is neavy and does not shrink; if you start with a blob, you end up with a blob. All strip wood is medium balsa, not contest balsa. Ordinary, run-of-the-mill, eight to twelve lb. wood is fine. The Living dangerously! Leon recommends using the winding tube if more than 150 turns are used. only exceptions are the carved That long, high aspect ratio wing is no doubt one of the reasons for the excellent performance. blocks (rudder top, nose block, prop) which should be softer. that are soaked for half-an-hour in Trial fit the false ribs by inserting a FABRICATING THE WING hot water, then formed around a few. If all looks well, try inserting the Make all the ribs in two separate balsa block carved to the proper upper spars, opening rib slots (if batches, using the mass production interior shape. Use white glue for necessary) to maintain alignment. technique. One batch is to consist of the lamination process, after placing Now check the upper trailing edge twenty-seven full ribs in 1/32 sheet, a sheet of wax paper between the member for fit. Use no glue until plus two full ribs in 1/8 sheet. The form and the first layer. Use a lot of you're sure it all goes together, then other batch consists of twenty-six rubber bands to hold the lamination bond. Now put in the diagonals, false ribs, or riblets, which stop together for the next twenty-four after whittling a pointy end on each short at the front spar. The first step hours. Now carve and sand the tips and inserting the pointy end be­ of this technique is to make a pair of to a half ellipse configuration of tween the top and bottom halves of rib templates from 1/32 plywood. about 1/8-incn minor diameter and the hollow trailing edge. The for­ Sandwich oversize rib blanks be­ 1/8-inch major radius. Thin it out a ward end of each diagonal rests tween the templates and bolt bit, working towards the trailing immediately behind the upper rear through at two locations,say midway edge. Viewed from the side, the tip spar. between the leading edge and the lamination is straight, i.e. it contains Continue in this manner until you front spars for one, and midway no droop. have three separate wing panels. between the trailing edge and the Cut trailing edge sections out of Now add the wing tips, after block­ rear spars for the other. Use a 6-32 1/32 sheet, .and you are ready for ing up the trailing edges to accom­ bolt with washers and get them as assembly. Start by pinning down the modate the 1/4-inch droop supplied tight as you can without crunching lower trailing edge. Lay down the by trailing edge parts A and B. The the blanks. There is a variation on lower spars, but don’t pin them to wing tip rib blank is inserted now. this technique, wherein pins are the board. Place the main ribs over There is no drawing of this part; it used instead of bolts. Forget it. The the lower spars and insert the leading was simply whittled on location carving stresses are much too high edge. Use pins pressing against the from an oversize blank until it and the pins will skew. Now carve leading edge, so as to push the looked reasonable (Pazmany gives and sand the package right down to assembly together. Check to see no details in his three-view). The the rib templates. that there are no gaps between upper and lower spars are carried Laminate the wing tips out of pieces or built-in stresses in the through the tip rib. These, too, are three oversized pieces of 1/32 sheet lower spars (are they still straight?). Continued on page 1 1 7

Checking trim before launch. Is noseblock seated? Tail incidence The heave. On low turns (125 this flight), launch it straight and level, correct? Wing square? Car keys in your pocket? On high turns, aim it about 15 degrees upwards and throw harder.

NOVEMBER 1978 91

P-40 by Dick Harding, McGregor, Texas, tied Bob Whitely with 19 Score board tells it all about the Open Stunt Finals. Bob Whitely the out of 20 appearance points in C/L Stunt. S.T. 60, 13x5 prop. winner, followed by Ted Fancher and Bill Werwage.

* AT ontrol line THE ♦ by JOE KLAUSE • An editorial in the June issue of Model Aviation read, “This might be the last opportunity to enjoy a Nats in the classic tradition. It so, Lake Charles offers the best combination of factors to make the trip worth­ while.” O K. the die was cast. We had to go, if for no other reason than to see a real live “ Coonass” . Travel started out on Sunday with a non-stop flight from Los Angeles to Houston on a "Proud Bird with the Golden Tail”. We were looking forward to visiting their famous libation lounge, but contrary to the TV commercials, “Sorry bub, no pub” . Houston, space capital of the Bob Whitely, Fountain Valley, California, and his own-design "Derringer 46". S.T. 46 engine, world, was steeped in Texan tradi­ 12x6 Zinger prop, J&K Products foam wing core. Built in 28 days!! tion . . . and had humidity 2-1/2 feet thick; quite a climatic shock to this Californian quinquagenarian who’s used to 80° and 20%. But so what, we didn't come to complain, so let's be on with it. With a rental car, and an enjoyable drive, we arrived in the pleasant community of Lake Charles, and settled down for the night. Monday morning, things certainly did NOT get off to a slow start. It’s Open Scale Racing, and in the very first heat, Les Pardue (Flipper) and Phil Shew (Whipper) turned a 2:59.9. Sub-three-minute heats have only happened within the past two years, and not very often at that. Well, race fans, would you believe there were 23 contestants, 10 of them became finalists, and every one of them had heat times under three minutes? Here's how they stacked up: ENTRANT TIME HEAT Bill Werwage's 3rd Place Open Stunt "Juno". C/L Stunt and R/C Pylon racers seem to have Les Pardue ...... 2:59.9 1 the best finishes of all competition types.

94 MODEL BUILDER Dick Perry launches George Voitik's profile carrier ship for its George Voitik's ship in a slow flight lap. George hails from Evanston, second place flight. Illinois.

Yipe! George Voitik went on to win 2nd place with a score of Former Navy Carrier Adv. Comm. Chmn., Dick Perry, with his 2nd 226.09 points. Sturdy pilot! Place (Class I) " Seamew". Bladder tank, ST G-40, 8 x 9 glass prop. Scott Sornberger . 2:54.1 2 glass prop on the catch for the first with Gary Fentress in the pit. Thanks Jim O n g ...... 2:57.0 2 pit. Les had some multiple-flip to Gary's start, John was off and Dick Lambert .... 2:59.9 3 restarts, and turned 6:30.8. Second running at the word “Go”. He got a Bud Harris...... 2:47.4 8 final: Kerry Turner and Stu Wil­ lap on Harris right there, and with Walt M cTier...... 2:57.4 9 loughby. Thanks to three single-flip the pits about equal, that was it. John Ballard ...... 2:48.2 9 restarts by Mike Wheeler, Kerry Harris did 5:47.6 and Ballard 5:45.9. Kerry Turner...... 2:54.0 10 turned 5:54.9. Stu had problems in A great race! The fifth and last final: Stu Willoughby .. 2:56.5 11 the pits, for a 7:06.3. Third final: Walt McTier and Dick Lambert. Walt Hal Lambert...... 2:51.7 11 Scott Sornberger and |im Ong. Scott started well, but had very lengthy With times and heats like that, it was plaguea by pits and needle pits. Dick ran well, but was the doesn't take much imagination to settings. Jim turned a very respect­ victim of a long second pit for a realize that literally everyone was able 5:56.7, despite one pit stop with 6:29.9. The top five: pumped-up for the finals. First final: many flips. Fourth final: Bud Harris John Ballard...... 5:45.9 Hal Lambert and Les Pardue. Hal was in the pit, son Doug on the handle Bud Harris ...... 5:47.6 faster in the air, but broke a fiber­ versus John Ballard at the controls, Kerry Turner...... 5:54.7

Rich Brasher (kneeling) and combat crew, Rich Brasher "takes o ff" in a Fast Combat match with Steve Hill, Redondo Beach. California. from Redwwod City, California. Rich won with a kill.

NOVEMBER 1978 95 The Jacksonville, Florida "Swamp Rats" are very big on Fast Rat. A super-competitive team. Dick Lambert, left, and "Jolly Green Giant" Larry Hill, mix it up in Fast Rat. landing for refueling, the plane skiddecl into the circle and out of reach of the pitman. The Wallace- and-Wallace team was third with 54 laps . .. blown engine. One other highlight was that Stu W illough­ by’s plane set a new American heat record of 3:58.9. That's fast! Of course, it was probably due to a very experienced diesel pit man, right? Wrong! Bob Oge was in the pit, and he swears that ne had never started or tuned a diesel until the day before the race! The Greater Houston C/L Model­ ers Association sponsored the un­ Carl Layman's 1/2A Speed ship. That's lam­ official Mouse Racing event. There inated wood, not a fancy stipe paint jobl were ten entries, and the top three Jim Ong ...... 5:56.7 were Les Pardue, Joe Klause, and Dick Lambert...... 6:29.9 Bob Oge. Interest in this event is Without question, it was the finest developing rapidly throughout the day of Goodyear racing we’ve ever country, if for no other reason than seen. Congratulations to all con­ the fact that it is relatively inex­ Frank Garzon carries Nick Sher's B Speed pensive. cerned. ship to the flight circle. In recent years, besides reading Tuesday was limited to FAI Team gobbledegook everywhere about Race and some unofficial Mouse gether, and took first place with a KGod is dead”, it’s been rumored Racing. In the Team Race final, Jim fine 8:42.1. Stu Willoughby was that Fast Rat is gasping its last breath. Jolly and Ken Mogi put it all to- second with 164 laps. D uring a Think so, huh? Not if this Nats is in

Marshall Busby applies battery power as Paul Tune hits prop on his The busy pit area on B Speed and proto day. Entries were a little Slow Rat. "Nashville Rats" members. Paul was 1st, Marshall 2nd. lower than usual.

96 MODEL BUILDER any way indicative. There were 32 entries! Haven’t heard of that many in a long time. How about the level of competition? Judge for yourself, and remember there are now three pit stops required in the final: OPEN FINALS 1. Harold Lambert...... 4:51.1 2. Richard Lambert ...... 4:54.55 3. Les Pardue...... 4:56.3 4. Kerry Turner...... 5:03.3 5. Robert Oge ...... 5:05.9 6. Gary Fentress...... 5:10.55 7. Ronald Esman...... 5:14.95 8. Paul T u n e ...... 5:20.9 9. John Ballard ...... 5:30.25 10. Mike Wheeler...... 63 laps The performance by the well-known father-and-son team of Hal and Dick Lambert is especially noteworthy. Their team and pitwork in this event were flawless, their engines really Fast rat winners (I to r): Hal Lambert 1st, his son Dick 2nd. and Les Pardue 3rd. Lamberts honked, and they deserve our spe­ from Daytona Beach, FI., Pardue from Albuquerque. cial congratulations. Junior-Senior Fast and Slow Rat 1. Tom Fluker...... 6:10.3 2. Chris Busby...... 5:06.30 were not exactly inundated with 2. Tobey Busby...... 6:28.75 SLOW RAT contestants, but those who were 3. Anthony Smedley...... 8:17.2 JUNIOR there had all the enthusiasm it takes 4. D.J. White ...... 10:55.55 1. Anthony Sm ed ley...... 7:26.5 to be extraordinary competitors. 5. Glenn Fultz...... 14 laps 2. Glenn Fultz...... 7:49.35 FAST RAT SENIOR 3. Tom Fluker...... 8:14.45 JUNIOR 1. John W olfe ...... 4:55.05 Continued on page 100

John Ballard's 1st place Goodyear. Rossi 15. All 10 finalists under 3 Reverse of photo at bottom left, previous page. Paul Tune holds, minutes, all Rossi's. Marshall Busby flips.

Stu Willoughby, British dentist now living in Illinois. Pitman Bob Ken Mogi and Jim Jolly, Southern California, with their First Place Oge, never before started diesel. They set U.S. FAI record. FA I team racer.

NOVEMBER 1978 97 EXPERIMENTAL (1 10) Čn (*10mm)

\y J 1/1

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/ n / / h r i COURTESY OF MODELÁŘ MAGAZINE, CZECHOSLOVAKIA

98 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER £ > “ MATCHED FINISH SYSTEM” is a complete correlated finish system providing all the ingredients required to cover, repair, seal, prime and paint your model plane, car, or boat.

K&B FIBERGLASS — for covering K&B Micro-Balloons FILLER — The highest quality, toughest weave fiberglass Ideal for use on car bodies or boat hulls. available. Excellent contouring qualities make it Perfect for fillets, filling in dings or dents, or ideal for applying to compound curves. Created repairing damage. Mixed with K&B “ MFS" specifically for use with polyester or epoxy resin. Resin, it sands to a beautiful, smooth, strong Available in 3 weights - 38“ wide - LIGHT V· OZ. hard finish. CLOTH. For all wood airplanes - cover 100%. 2.45 oz. CARTOH MEDIUM 2 OZ. CLOTH. For increasing structural strength around fillets, nose, or interior of plane. HEAVY 6 OZ. CLOTH. For joining wings or molding your own parts. K&B PRIMER K&B PRIMER CATALYST K&B SUPER POXY RESIN — The last step before painting. for sealing and applying glass cloth. K&B Primer may be brushed on or SUPER POXY Used with K&B Fiberglass, as part of the "MFS" it is easily sprayed. Fills every crack, sands nutcau) rMM intQr workable and requires a minimum of sanding. Little, if any extremely extremely easily to a clogging of sandpaper. Curing time adjusted by the smooth, smooth finish. amount of catalyst. Durable, does not become brittle. V i PINTS only 1 QT. CAH (Including catalyst)

K&B MEASURING CUPS Twenty-four one ounce, unbreakable plastic cups with unlimited uses. Epoxy resin and most model and craft cements will not adhere. Ideal _^for mixing or measuring small amounts Í i i k of Paint, Filler, Resin, Primer, etc. . Each cup accurately graduated with milliliters and fluid ounces.

SUPER POXY ' matched fin ish system

AND IT GIVES YOU A CHOICE SPRAY or BRUSH/SATIN or GLOSS in 33 COLORS For that final step in the K&B "MATCHED FINISH SYSTEM” Super 11 BASIC COLORS Poxy Paint is unequalled in quality. Its super high gloss LASTS Red · Blue * Yellow * Orange · White · Black · Aluminum · Metallic Green " Metallic Blue · Metallic Red · K&B Purple · Clear LONGER and is LEAST AFFECTED by ultra-violet rays or manufac­ All above packed in Vi Pt. or Vi Pt. cans tured fuels. A development of the space age, it is formulated plus 22 ADDITIONAL COLORS by mixing— see color chart at four dealer exclusively for m odels... MIX and USE. NO WAITING TIME! NO CATALYSTS · THINNER HAND RUBBING! Easy to apply and most durable, it is the utili- • SPRAYING — Satin or Gloss — Vi Pt. or Vi Pt. For use with K&B SUPER mate in model paint. • BRUSHING — Satin or Gloss — Vi Pt. or Vi Pt. POXY — Pints or Quarts Only the K & B "Matched Finish System” offers correlated top quality products and ease of K&B MANUFACTURING application each step of the way. 12152 WOODRUFF AVE., DOWNEY, CA. 90241 And beautiful results... you can see them!

NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 99 ^M>m tAe ^o/den o/ S$via/ion

'Ý e /ie ,^ίίοτιΧΗΧΜ φε

America's most popular trainer from the golden age of aviation, the Velie powered monocoupe is said to have accounted for nearly 90% of all light planes produced and sold in this country during its heyday in 1928. This just released kit contains all hardware, premium balsa, and spruce necessary to build the most popular variants Models 70 and 113. Structured like its namesake, the model brings together the perfect combination of lightweight for spark­ ling flying performance and rugged strength to shrug off a beginner's errors. The spritely Short field performance of the original is virtually duplicated in our Half A beauty whether you opt for glow or electric power.

Wing span 49 inches, weight area 338 sq. inches, 2 or 3 channel radio, 049 glow or 05 electric.

SWING A BIG ONE! SMOOTH, Our new ball-bearing speed PRECISE CONTROL reducer lets you swing a Our new electronic speed big prop for more thrust. control provides smooth Perfect for Old Timers or precise control of electric for that big scale job, and motor speed. Compact and scale boats. The high qual­ lightweight yet capable of ity timing belt and preci­ handling 20 AMPS. Plugs sion pulleys insure long directly into receiver thus life and silent operation. elim inating the extra servo.

Dick Lambert...... 112 laps (prop) screws were another story. C / L ...... Continued from page 97 How about the engines tnese guys It was solved, however, by the used? The first three (Nashville Rats) keen perseverance of your handy- 4. Austin Thomerson...... 8:27.3 all had the new O.S. Max .36, fourth dandy writer, along with the under­ 5. D.J. W hite ...... 12:25.6 had a new HP .35, and fifth was a standing aid of a next-door neighbor SENIOR K&B 5.8. In the top ten, there were 5 who tolerates the airplane nut who 1. Larry Hoffman ...... 5:43.2 O.S.’s, 3 K&B’s, 1 TWA. and 1 HP. forgets to cut his grass. 2. Doug Harris ...... 6:04.45 In summary, it was a mighty fine He provided a block of steel with 3. Ron Esman ...... 6:14.15 week of racing at the Nats. Those a slot, through which I drilled a hole 4. Russell Crawford...... 6:35.75 who did well were obviously well matching the diameter of the head I 5. Mark Seigler...... 8:16 prepared, and they justly deserve wanted to duplicate. You then need Saturday, the last day of C/L their awards. For all racing fans, take a close-fitting punch to go through racing. The event: Open Slow Rat. Bill Cooksey’s advice: ,rGo drum­ the hole. (In my case, I used the drill The Foremost question: Will the mer, get ’em drummer!" · *I bit I ruined drilling the hole in the Nashville Rats do it again? They did, first place!) and there’s no question in our mind 1 to 1 ...... Continued from page 24 File or grind a curve into the about why they did. It’s very obvious punch. You’ll need to experiment to that those guys really work at it. H) Do you need a piano hinge find the degree of curve you need. When you watch Paul Tune and that works? Try the small Klett The stock I used to punch the Marshall Busby work together as a hinges, strung on a single wire. Clip rivets out of was Sig’s Aeroplastic team in the pit, you know right away the ends of the tab on tne hinge and sheet, .010 in. thick. This material is that they’ve spent many hours prac­ anchor it in the door and jamb. easily glued, painted, etc. ticing. They’ve also got a good pilot Substitute a finer wire for the size The sheet is inserted into the slot; out in the center: 6-toot 5-inch Larry used in order to prevent the joint (Jolly Green Giant) Hill. It’s no a gentle tap on the punch produces from gluing itself solid when install­ a beautiful little curved circle of surprise, then, when we read the ing it. results: plastic. What innovative items have you At this point, you can go in several Paul T u n e ...... 5:33.8 found to substitute for real things on directions. A gentle touch with a pin Marshall Busby...... 5:38.1 your model? and a small drop of instant glue, or Larry H ill...... 5:39.9 WHAT A HEAD PHILLIP HAS! better yet, RC-56 by Wilhold, and Ron Esm an...... 5:41.1 I was faced with the problem of you have a rivet head. If you wish to Larry Miller ...... 5:50.6 coming up with a profusion of make it a pop rivet, pre-drill a small Mike Wheeler...... 6:04.0 fasteners for the Hiperbipe I built hole into the plastic before punch­ John Ballard...... 6:13.4 for the World Champs. The 00-90 ing out the rivet. Pick the head up Dick Ritch...... 6:25.8 slotted screws were no problem, but with a pin. apply the glue, and put Mike Tallman...... 6:27.9 480 pop rivets and 230 Phillips-head the head in place with a gentle push 100 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER SAILPLANES LOVE ELECTRIC POWER

Yes, electric power and soaring are blissfully com­ patible; both are clean, quiet and lots of fun. Here is a perfect combination: • The high thrust Astro 05 electric power system. • The Super Monterey Sailplane, an improved version of the world-famous Monterey that features hands-off stability and an excellent floating glide. • The rapid charger that charges your electric system in just fifteen minutes from your auto battery. Now you can fly from that neighborhood field that is too small for a winch or high start. Fly electric! it's the neighborly thing to do. Available at your dealer now.

RSTRO PLIGHT inc. PIONEERS IN SILENT FLIGHT

13377 BEACH AVENUE, VENICE, CALIFORNIA 90291 Send SASE for FREE Catalog of the pin. As the pin point goes that spans 88 inches and weighs 12 THIS AND THAT through the hole, it will collapse the lbs. 8 oz. It flies beautifully on two While working on the Hiperbipe, rivet inward, just like a pop rivet. HP .40's, and indeed, must be throt­ I managed to ding the same wingtip Later, you can clean up the hole tled back somewhat to maintain an twice. I used the little gouges as an with a small drill or pin point. acceptable scale speed. excuse to try Pettit’s new PFC as a The Phillips head requires a bit Others have written about why filler. The wnite, polyester material more work. You need to grind down two engines put out more oompn worked beautifully. It feathers so a small Phillips bit to fit the hole in than one engine of the same size. As that the patches are invisible, and the steel block. Inserting it into the I recall, it comes down to the square sets up quite quickly. It was not bottom of the block so tnat it is just of the cube root being larger than necessary to fill any pores, and I below the slot (1/8-inch or more) the sum of two propellers minusthe painted directly over it. will allow you to punch the head radical of the framistan. All that may One small problem exists, how­ and imprint it in one operation. You be true, but the simple fact is that ever, that witn a little practice can may have to play a bit with a file to two do more work than one. perhaps be solved. The instructions I am constantly asked how the suggest so many drops of catalyst get the Phillips imprint correct. per "golf ball-sized'’ amount of All of this may seem terribly time- DeHavilland flies on one engine. I don’t know, and if I’m lucky, I’ll filler. A warning is given that too consuming, but it really isn’t. For the much catalyst may result in leaving rivets, you can punch a dozen or so never find out! Okay, I agree that somewhere along the line I’ll lose the material rubbery. and pushthemthrough.The Phillips, In no way did I need a “golf ball­ of course, are a one-at-a-time deal. one and we’ll find out. In the mean­ time, the performance is great, the sized” amount, so I was forced into HOW MUCH ENGINE FOR ATWIN? vibration is lower, and I burn less trying to guesstimate how much Some of the articles about twins fuel. In addition, ,60’s would never catalyst to use. Gradually, I managed and engine sizes may lead some have fitted into the nacelles .. . to arrive at a workable solution, but modelers to confusing thoughts. neither would the tanks. there is probably some solution to Often, I have heard people say that Consider a twin, if you have some this that would involve a more they like lots of power in the event experience to bank on. They sound scientific approach. of an engine failure. Many of us great and draw a lot of attention. A The product surely is a scale have watched a twin roll over and tail-dragging model is a little more builder’s helper, especially if he die when an engine fails. Of course, sensitive on takeoff than trike gear, keeps dinging wings. there are many exceptions to this, but with cautious rudder, you can Up till now, I have used two forms but I’m not all too certain that the make it. of retract slower-downers on the extra engine size is what it’s cracked A large number of twins used DH 88. Hydra-locks, from Idea up.to be. inline engines, which make them development, provide an almost For the past year I have been suitable for hiding engines. infinite amount of control, and flying a DeHavilland DH88“Comet” Think twice . . . then build two! make the gear very dependable. NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 101 what damage (and even fires) can be d u x .?; h o h b v Cj c o U gu ide to aicbfUS^jO^ 07 ju»coicx peg«s p«^K«d wilhhovv 10 ----- S n o u u / 1,- 2 — g- β β O S o n instructions tcx caused by rampant electricity, I b a d g e s 5 injotmation and instruction«, Jot think that this protection, or some­ everyone. “21 big sections on objects ^jch os fixin g Paint. Model Camou thing similar, is definitely a good jiage and Painting on Velvet. Over idea. 140 coiot photographs oj step-by· The charge current of the test system was measured at 44 mils; a Step techniques jot S P ^ Y '^ models oj all kjnds.cetamlcs. murals and many safe but adequate rate for the 550 othet hobby and ctajt projects- MAH battery used. The manual recommends an initial charge time Buy it - you'll HVf It' ΟΓ1Ύ w ·95· of 24 hours, and subsequent charges AcW your local hobby o< croft outlet o< of 16 hours prior to each flying session. Send S4.95 plus 75410 covet postage I liked the fuse, but I did not like end hendWng to·. Dept. HCG- the unprotected back of the trans­ mitter case. We all have our habits, good or bad, and one of mine is to get everything ready before I start the engine. This includes extending s a s a s s æ s s - the antenna. To keep the transmitter DiSt.mCAnadatJ* „ΟβΒΥ \H0USTTOtS.24 Rowan O n * · ***** from toppling over, I then lay it on its back, which would eventually get scratched by the paved surfaces on which I do all my flying. On grass, this is not a problem, and even so, The constant lubrication, and the was easily solved with the drilling of fact that both gears tend to work at four holes and the installation of ^«op^Ä^^^conds. four nickel rubber feet. closetothesamespeed.isan impor­ tant consideration. foot altitude! Lands fr° m 10°- All the electronics are installed on I have also tried the small in-line End of lesson Nr>u/i„~, a single PC board,securely mounted restrictors available through Flite- Look ou, Woodvale. herTlæ rnei *I vertically in the center of the trans­ glas. While it is not possible to mitter. I have always preferred regulate the flow, they slow the gear single to double-board designs, down quite well. It is recommended Kraft Review . Continued from page 61 considering them to be mechan­ that air alone be used; however ically superior. I like the elimination pared to other transmitters avail- of as many wires as possible. A piece Ralph White has used gas, which is able, or range during flying. of wire from point “A” to point “B”, okay as long as liquid does not enter properly soldered at both ends, can the line. The transmitter antenna is a 9- section, 47.5-inch whip. |t has a be almost perfectly reliable, but There you have your choice of screw-m base mounted on top of using a 1/16-inch land on a high- restrictors. Neither one forces you the case, and is easily removed for quality PC board eliminates the to restrict the line externally, which the antenna-less range check that is ‘^almost” . sometimes results in damage. recommended and fully described The stick-to-servo link is tight SOME CLOSING THOUGHTS in the manual. enough for any practical require­ Next month's column will present The charging system is shared ments that we might have for this the results of the World Champs, with the receiver battery. It starts system. Stop-to-stop stick move­ and observations of a contestant. In with a wall plug-in transformer, ment resulted in a measured addition, I will pass on to you, even which supplies low-voltage AC to average of 99 degrees of servo though this is an R/C column, my the rectifier and charge indicator output movement. Trim range first free flight experience. LED, located in the base of the measured exactly 15 degrees aver­ As reported earlier here (and in transmitter. A connection is then age. The difference in these figures, Fernando Ramos’ column), there made with the cable provided to the and in centering, from channel-to- will be an unofficial, informal F/F charge connector on the airborne channel, and in moving one servo competition at Woodvale. I will be system switch harness. All connec­ from channel-to-channel, were proxy-flying Tom Stark’s free flight tions are done quickly and simply inconsequential and well within the model. with fool-proof polarized connec­ range of the trims. Earlier, when I requested some tors. Both switches must be in the RECEIVER briefing on “how to’’, Tom said he’d “ OFF” position before charging The Kraft Sport Series receivers, give me a “crash course” on what to takes place; the LED will not Tight known as the KPR-4A and -6A for do. unless everything is normal and the the four and six-channel models, The session went something like batteries are actually taking current. respectively, are encased in white this: Tom and Bob walk out on R/C I liked the safety feature of this plastic, as are the servos and the rest runway. charger; a fuse that is actually a land of the airborne components. This is Bob; “What kind of fuel do I on the printed circuit board, and primarily to differentiate them from need?” which will offer protection in the similar components used with other Tom: “Oh, anything will do.” event of a sustained short circuit or Kraft systems, which are not inter­ Tom fills tank until it overflows. high-voltage surge in the line. changeable, and which are gold in Says it will give a 20-second run. Note that this is not an owner- color. Attaches glow plug clip to .049. It replaceable fuse of the type that we The receiver dimensions are 2.78 are familiar with. The proper testing X 1.36 X .83 inches, at a weight of 1.7 fires. No adjustments. ounces for the 4-channel and 1.8 for Tom reaches over, sets model on and repair of the charging circuit, if this fuse does open, will require a the six. runway facing wind, releases, fol­ The circuitry of the KPR’s follows lowed by perfect takeoff into 18 technician. However, having seen SENT YOU! MODEL BUILDER 102 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER traditional and conventional lines. It is a superhet, single-conversion, BY POPULAR DEMAND crystal-controlled, three-stage IF amplifier receiver. The normal clipping, audio amplification, etc., is done with transistors and other discrete components, after which a GIANT (©Scale! dual op-amp 1C takes care of the clock and sync reset, and another 1C does the decoding. Everything is on one board, with nice, wide lands, and an uncrowded component placement. This re­ VINTAGE WHEELS PILOT GOLDEN AGE WHEELS Typicol of the wheels used Enhance the realism of Disc-type wheels which ceiver could obviously be smaller, during World War I and your giant model with this were used extensively from but there are two schools of thought on through the mid 1930s. easy-to-paint pilot, molded the late 1920s through on this subject. I often think that Semi-pneumatic tires, and from high-impoct styrene. the 1930s. Semi-pneumat­ miniaturization is done for minia­ brass-bushed wheels. 6 % " Separate goggles are in­ ic tires, and brass-bushed turization's sake. There are obvious diameter. $17.95 pr. cluded. 4" toll. $2.95 wheels. 6Vj diameter. benefits to this, such as the myriad of $ 1 7 .9 5 pr GNOME ENGINE CYLINDERS OTHER SIZES 1/2A R /C ’s that have descended on The Gnome rotary engine wos among the most WHEELS AN D PILOTS us, and which would not be possible famous powerplants of the World War I era. Now ALSO AVAILABLE with the larger R/C systems. The you can make % size reproductions more easily, R/C equipment manufacturer that with these detailed, high-impact styrene cylinders. caters to this has to live with the two- Approximately 3” toll. $1.95 eoch piece boards and other packaging It your deoler won't supply, order direct, adding 15% postage and handling .W lU JIAM * Send 50c for Illustrated catalog DEPT. MB problems of smaller receivers. »ROS iN C ^ , 181 PAWNEE STREET, SAN MARCOS, CALIFORNIA · 92069 For the average-size sport and trainer airplane, into which you can stick your head without getting is below the factory acceptable power increase, and a greater safety balsa dust on your ears, this is a figure of 7 mils, and very economical factor against amplifier fatalities. convenient size, and I will gladly indeed. Output arms are furnished in both take the added reliability of the SERVOS. the familiar rotary arm and wheel. single, uncrowded board and wide Two different servos are offered One feature I especially liked is that lands. with the Sport Series, the KPS-14IIA, the output shaft, or square peg, is The size is also slightly increased at 1.4 ounces each, and the KP- brass-bushed and threaded, and an by the fact that the servo and power 15IIA, at 1.8 ounces. The -14 is 2.15 honest-to-goodness machine screw connectors are mounted on the inches long X .76 wide X 1.5 high; the is used to nold the output arm in board, instead of on the ends of wire -15 measures 2.28 inches long X .92 place. I consider this far superior to pigtails. This is my first experience wide X 1.5 high. These dimensions the sheet-metal-screw-into-a- with this sort of arrangement, and I include the mounting ears, but not plastic-shaft type, and it is a feature had to change my modus operandi the height of the output arm or not often seen on the cheaper somewhat because of it. Maybe I am wheel. Torque figures are 14 ounces radios. The screws are 1-72 X 1/8- guilty of overkill, but I like to pack for the -14, and 24 for the -15. Both inch long, and only those furnished the receiver in a plastic bag, and have a .5-second transit time for 100 or similar ones should be used . . . secure the protective padding to it degrees of travel, and both are rated none fatter, none longer, and no with tape or rubber bands, and then at from 0 to 140 degrees F. Centering sheet metal ones. The thread is not put it in its proper location in the accuracy is claimed at plus or minus exactly delicate, but it can be airplane. Using this type of plug 1%. butchered up if you really try, and arrangement, you can't quite do Servo amplifier standing current is the only cure is replacement of the that with a wing-mounted aileron a measured 15 milliamps, with the output gear. servo that yod have to plug in every no-load total running current of 150. Tne servo harnesses are much time. The stalled current is 300 mils. longer than I am used to, and my Kraft Systems does make an ex­ first thoughts were strictly negative. Mechanically, both servos are I could see that I was going to have tension to handle this rather minor well made, with thick-sided cases problem . .. but where was I to get to stuff a yard, oops, I mean .914 and extremely smooth-working meter of wires someplace. Then I one on Saturday night, before tne gear trains. The output gear, and the Sunday test hop? The extension does remembered that, as the receiver one preceding it in the train, are doesn’t have any wire harnesses, the make it easier to properly pack and thicker than the others, to help protect the receiver, and I would actual receiver-to-servo wiring is a them withstand the strains of flutter nice, convenient 10-inch length. nope that all Kraft dealers stock or if you insist on building mechan­ them and explain their use and ical stoppages in your control ACCESSORIES advantages to prospective buyers, linkages. The airborne battery furnished especially the newcomers who need Both servos use a single-board with the KP-4A system is the KB-4EA. and welcome all the help they can amplifier built around a Kraft- which is physically identical to the get. designed, Texas Instruments- popular Kraft KB-4E, except for the The claimed performance figures produced IC chip. The IC contains difference in plug wiring and the for these receivers are: sensitivity at most of the circuitry, with the ex­ fast-charge capability of the KB-4E. 3.0 microvolts; selectivity of 3 db ception of the feedback pot and the This pack measures 2.25 X 1.89 X 1 down at 3 KHz; spurious and har­ other timing components, and the inch, and is rated at 550 M AH. monic rejection minus60db; andan external drive transistors. The latter Though I did not have any particular operating range of 0 to 140 degrees usually add up to a higher current difficulties in installing this system in F. The test receiver has a no-signal handling capability than the chip the .25-powered airplane tnat I did current drain of 5.6 milliamps, which itself is able to deal with, a slight the test flying in, I feel that this is too NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 103 having already done all the dumb things there are to do, I hate to start in on any new ones. And I KNOW that if I start unplugging receiver antennas, the day will come when I won’t plug it in! One of my flying friends offered the perfect solution: FORGET it’s there . . . which I will The Flight Proven have no trouble doing. Treating this antenna as just another antenna will keep me from someday losing a bird C02 Motor for a preventable reason. For those ^ R E L IA B L E of you with a better memory (or a good checklist), this is a good fea­ 4 1 0 QR *SILENT ture, in that you can permanently ® l g — * S A F E install the antenna in your machine and connect to it when you install From A LL good Hobby Dealers the system, in the same way you connect batteries, servos, etc. There are some other extremely The switch harness is the same old useful, but not furnished, acces­ switch harness . . . but how could sories which I recommend. One is you change it, and why? It uses the an adjustable output arm, which has time-proven Noble switch, and has a an adjustment range of .5 inches, charger receptacle which is de­ and which is just the thing for signed for fuselage side mounting, if getting that “enough, but not too desired. The same warning applies much” throttle movement without REPLA-SKETCH * to the Sport Series switch harness. . . bottoming out the servo. I also like REPLA-BUILD * it is wired differently from that of the the servo tray switch actuator, which other Kraft systems, and is not inter­ eliminates cutting slots or drilling REPLA-FOTO * changeable. Multicon connectors holes in the switch knob. I didn't use are used throughout the system, one, ’cause I happened to have a SCALE DWGS. * which are as reliable as they come. spare from another manufacturer, Sure, you can damage them if you but the Kraft actuator is easy to REPLA-TECH stand on the plug and pull on the install and works well. CATALOGS wires with a pair of pliers, but .«INTERNATIONAL. INC In the bargain category, there is $ 1 . 0 0 *3 8 50 0 MC KEM ZIE HWY. with proper care . . . NEVER pulling an assortment of horns, bellcranks, VIOA. OREGON 97488 on the wires, but only by the plugs, pushrod exit guides, flag clips, push- pulling straight out without twisting on collars, screws, wing hold-down much battery, both in size and . . . these connectors will probably bolts ... in short, everything you weight. Therefore, I was glad to see outlast other parts of the system, and need to install this system in just that you can also get some 450 mil probably most airplanes. about anything from a T-tail glider packs, a KB-4SA, measuring 1.44 Two servo trays are included with to a wide-boaied Ugly Stik. Only inches square by 1.37 inches long, this set; one which mounts three $2.49 . .. See? I told you it was a and a KB-4MA, which is 2.77 inches servos in a side-by-side arrange­ bargain. ment, and a single mount for one long, .78 wide, and 1.37 high. Both Tnere are two maneuvers for servo on its side, for in-the-wing which this system gets the full ten weigh in at 3.4 ounces. mounting. This probably takes care On second thought, that large points; the manual, and the avail­ of 99.9% of the average require­ ability of service. battery pack is probably a perfect ments. For you other .1%, there is size for the type of flier for whom also a three-servo mount that holds The manual is a 12-page, 8 x 11 this system is primarily designed; two lengthwise and one across, and affair that covers the subject thor­ the beginner and sport flier who a single upright mount. Both multi­ oughly, without getting so wordy generally has only one airplane and ple mounts also have provisions for as to scare off the potential user. It is looking for maximum flying time mounting the switch, and enough touches on general subjects such as per session. I seldom take out one rubber grommets, screws, and out­ safety, FCC licensing, and basic R/C airplane ... it is usually at least two, put arms are included to handle any theory, then goes into specifics of and sometimes three. And my think- possible combination. charging, how to make the neces­ ing is further influenced by my One feature or accessory that I am sary connections, modes, flying, etc. Quarter Midget racing, where I reserving judgement about is the As good as any, and better than really only require enough battery plug-in receiver antenna connector, most! life for five or six flights of less than which was introduced by Kraft Sys­ The all-important service is avail­ two minutes each during any one tems this year. This is a single-pin able at the factory in Vista, Cali­ day. Even with this big battery, the connector located 4-1/2 inches out fornia, and at 27 service centers in receiver/servos/battery weight is from the receiver case, to which you the U.S. and many others around the only 12 ounces. can plug in a normal flying antenna world. This is indicative of two My flying habits are not important 32 inches long; an 18-incn unit for things: there are one hell of a lot of here; what is important is for you to small aircraft and gliders; or a 12- Kraft radios out there, which is remember that Kraft batteries other inch whip, which comes with further indicative of their high than those specified are not com­ mounting hardware for installation quality. And wherever you are, patible with the Sport Series, so in a boat or car. you’ll be able to get them fixed . . . don't go plugging it into your KB-4L It really sounds great, you say. so because, sooner or later, whoever 225 mil job, in search of a lighter and why do I have any reservations? you are, and wherever you live, or smaller battery. Because I tend to forget things, and whatever brand of radio you own, it 104 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER D HB-ENGINI 1 Made in W.Germany PERFORMANCE · PRECISION · POWER DESIGNED AND MANUFACTURED TO MEET THE HIGH PERFORMANCE DEMANDS OF TOMORROW’S COMPETITION-TODAY! HB.21 PDP* (3.5 ccm) The HB-CAR ENGINE is an engine with ‘ Perry Directional Porting one purpose in mind...TO WIN AUTO RACES! This is not an aircraft engine that was modified for cars, but a car engine intended only for cars.

WRITE FOR FREE COLOR CATALOG DEALER INQUIRIES INVITED

BAVARIAN PRECISION PRODUCTS CO. • P.O. Box 6. 22 East Avenue · New Canaan. Conn. 06840 will require service! It might take a sions, one of my friends asked, that these systems are designed to rarity, such as being mid-aired by a “How do you like your new Kraft?” sell for. In all, I found this an easy-to- pterodactyl, or the more common, My immediate response was, “I like install-and-use R/C system. Ί was making a low inverted pass, it, it works well, and it works every Price? The KP-6A is $329.95, with and . . .”, but you are going to need time.” Working well, and working four servos. The KP-4A, also with service. It is comforting to know that every time, and being built so as to four servos, is $299.95. From Kraft it is readily available. continue to do so, is about all that Systems, Inc., 450 W. California Ave., we can ask of any R/C system, espe­ Vista, CA 92083, and its many dealers In effect, the Kraft Sport Series worldwide. · system carries a one-year warranty cially one in the Sport class. .We to the original purchaser, from the bought it, knowing that it came without “air conditioner, stereo, H alf-A ...... Continued from page 35 date of purchase, and is validated by and white sidewalls”. Mine now has a registration card which must be enough flying time to convince me ates, and it is still under the adviser- returned to Kraft Systems. The initial ship of longtime modeler Professor warranty, “free from defects in of its reliability, and I fly it with the same degree of confidence that I fly Eugene Larrabee. The TMA was (and material and workmanship”, is for my “ oldies but go od ies” . It is a is) a very active group in indoor 90 days, during which time the feeling akin to the one i used to modeling, but R/C gliders have system will be repaired without know as we would clear Golden taken over as prime interest. Small charge. A period of extended war­ Gate Intersection outside San Fran­ R/C models have currently moved ranty follows for nine months, dur­ cisco and set course for Hilo Inter­ into second place, and Bob sent ing which the system will be covered section outside Honolulu, in one of some photos for our entertainment. under the same terms and condi­ the USAF’s C-124’s. It was never with First photo is Dave Felsenthal tions, as long as it is determined to the thought of "I wonder if this have received only reasonable wear holding Bob’s original F-15 and MIG bucket of bolts is good for 2600 of 25 models. The MIG weighs in at 16.5 and tear. water”; it was always with plans for All of this is void if you or your ounces with a Cannon Super Mini that evening's dive into the salad brick. The F-15 is 21 ounces with a well-meaning friend modify, alter, bar, a lobster, and a Bacardi and or otherwise tamper with any part of standard-size radio. Flight charac­ Coke at the club at Hickam AFB. All teristics are described as "tricky”, the system. This sounds fair and just of us who have flown big ones or to me, as does the rest of the war­ but the visual effect is spectacular in ranty. little ones for any length of time the air. Fuel is provided by bladder know the feeling, often unspoken, tanks located at the CG to minimize FLYING of knowing that we can depend on a flight trim changes. Next photo is As mentioned, the test flying was mechanical object . . . and hoping another of Bob s originals ... an done in a .25-powered bird ... an that it feels that way about us. .020-size pattern model. No name HB .25-powered Hobby Shack “Shell et, but I bet the second word will Fly 20L” , to be exact. This airplane is Overall, I found the quality of the Kraft KP-4A Sports System to be e “Birdie”. Again Bob used a fast and responsive enough to show bladder tank to feed the engine, a up any unwanted characteristics of excellent, both mechanically and operationally. There are no “made Tee Dee .020. Weight is 8 ounces, the radio, such as lack of servo wing area is 95 so. in. Bob says it is power under air loads, poor center­ in Transylvania from leftover Frank­ enstein parts” components any­ very smooth ana uses almost no ing or loss of trim under load, etc. airspace. We gave it the full treatment, in­ where in the system. The molded cluding lots of flying, long and low, and machined parts are a tribute to It really pleases me to hear that antenna collapsed at high altitude, Joe Pezak, the number-one ma­ this club is still going strong. I and flying with adjacent frequencies chine shop man at Kraft, who is the belonged to it exactly 15 years ago, in use and in close proximity to finest craftsman in this field that I and it had been around at least 10 those transmitters. Through it all, it know of. years before that. Hey Eugene, how worked solidly. The electronics are state-of-the- old is the TMA, anyway? Members During one of these flying ses­ art, at least within the price range of other college clubs, let’s hear NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 105 to avoid the searing heat of the Write For FREE BROCHURE inland roads. From a sightseer’s standpoint, the coast would have On Our Complete Line Of few equals; however, we were un­ prepared for the eleven hours R/C PROPORTIONAL EQUIPMENT involved in traversing the course! To including anyone contemplating the excur­ sion, we would strongly suggest the allotment ot extra time for photog­ WORLD'S SMALLEST SUPERLIGHT raphy stops and side trips. A more DIGITAL CONTROL SYSTEMS time-efficient approach would be to fly, as Lou Proctor did. Regardless of SMALLEST SIZES ,PL6ASE sem AIRMA|E P0STAGEI LOWEST PRICES transportation mode, the visit is particularly rewarding. 13400-26 Saticoy Street In addition to a most impressive North Hollywood, Calif. 91605 model flying site, Hill Country Phone (213) 764-1488 boasts faoulous collections of air­ craft, automobiles, and horse- drawn vehicles. Admission is free ratio was quite good. Many free 4 NKW KITS OF WORLD . . . almost unheard-of for anything flight and U/C models were pow­ these days. Nearby is the Flying Lady CLASSIC AIRCRAFT ered by this revered trio of oldies! restaurant, itself a mini-museum for Thanks a lot, David. Now, how aviation enthusiasts. Featured are about some of you others coming up with photos of YOUR collector’s dozens (perhaps hundreds?) of large models suspended from the items? ceiling, not to mention the full-size Final item for the month is the Blériot reproduction and many alter-ego to the T-10A low-wing smaller items of aero memorabilia. intermediate trainer I showed you a Staffed by attractive and pleasant couple of months ago. This is the waitresses, the Flying Lady offers Briai T-10. Designed as a real be­ tasty fare at reasonable prices. Only ginner’s trainer, it uses a .10 or .09, one drawback: the place is TOO and two or three-channel radio. popular! Owners Irv and Jan Perch Construction is rugged and simple, are well aware of this problem, performance slow and docile. Just however, and are constructing a the ticket, eh what? · much larger facility next door, to accommodate the overflow crowds. Hannan...... Continued from page 78 On the other hand, it would be difficult to imagine a more interest­ Floor shows might be a better de­ ing place to wait. Gives one time to scription, since they are exciting thoroughly study the many displays. presentations, illustrated with action models and illustrations. For The contest itself was quite suc­ example, his talk to Chapter 14 of cessful, with a good variety of the Experimental Aircraft Associa­ Golden Age models participating, in tion, regarding the relationship spite of rather breezy conditions on between models and full-size man­ the first day. Spectators have an carrying aircraft, was punctuated ideal situation at Hill Country, since with flights from miniature “bats”, the layout permits relatively close gliders, and Peanuts. Not only did he examination of the entries both in Send 25« for catalog of fly them, but so did members of the the pits and during flight. Also, the all FLYUNE'S classic kits See youräealer audience! Needless to say, no one clever and informative banter of the NOW was bored, and doubtless, a few P.A. system kept everyone enter­ members may have had their tained and aware of contest KLYLINE MODELS, INC. progress. Monty Groves shared FAIRFAX.FMODOftR W1RQMRA AVI nil »0)1 interest in moaels rekindled. Side­ • rtn »»> i»>< light observation: Walt writes with microphone duties with Scottish his left hand, but winds props with C.D. Jim Adams, who sounds very from you too! College fields and his right. Perhaps our resident psy­ much like racing driver/commenta- 1/2A models are the ideal match. chologist, Dr. Dzus.canexplain this? tor Jackie Stewart. The "show biz” Another letter I received recently aspect of model aircraft flying is is from David A. Barfield, 162 St. FRANK TALLMAN REMEMBERED often overlooked, and we must Mary's Court, Congers, GA 30207. Among the many items that have congratulate this group for properly He was kind enough to respond to emerged regarding the late Frank exploiting such possibilities. Of my plea for photos of old 1/2A Tallman, was the fact that he had course, they do have a few rather engines. He’s been listening to my accumulated more flying hours in unusual advantages . . . where else lectures on good photography, too! World War 1 aircraft tnan any other could one have access to full-size From left to right are a throttled Jim pilot. museum aircraft for demonstration Walker .065 (originally an Anderson MORGAN HILL SPECTACULAR fly-by purposes? Rhinebeck and Royal Spitfire), an Atwood Wasp We had the pleasure of attending Old Warden are the only other .049, and a Spitzy .045, by Anderson. the first annual Golden Age (Plus) locations that come to mind. For this The Wasp was one of the first “ hot” R/C Scale Contest, conducted at Hill meet, Monty Groves, Jr. did the .049's... it would get a 6 x 3 up over Country, Morgan Hill, California. honors, with a spectacular display in 15,000 rpm! Actually, with a weight Our little expedition chose the coast the recently restored Focke-Wulf of 1.1 ounces, the power-to-weight route northward from San Marcos, 44J “ S tie g litz” , resplendent in 106 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER Swedish markings. We were particu­ we hope to announce in the near larly fortunate in having a descrip­ future. tion of the machine's history and It was with great reluctance that INTRODUCING characteristics delivered by his we left this mecca for modelers, to mother, Patricia Groves. start the long trip southward. En A NEW TOOL IDEA The friendliness of all the people route, we passed Shafter Airport, at Morgan Hill added much to our near Bakersfield, site of the Kremer enjoyment of the contest, and Prize-winning Gossamer Condor several people offered kind words man-powered aircraft flights. The about Moael Builder magazine, remoteness and stifling heat of the which we always appreciate hear­ location would seem to provide ing. One faithful reader has devel­ quite a test of man-power and oped a novel system of model determination, apart from the actual TetniT covering, which he promises to task. A sign held up by a grubby CUTS COVERITE, share with us soon. hitchhiker said it all: ANYWHERE!'' MONOKOTE, TISSUE, SIGN-OFF With so many fine scale models NYLON, SILKSPUN, ETC. present, it seems unfair to single out It is becoming increasingly ap­ parent that certain people would only a few for comment, but we CURVED MICROBLADE were attracted to a highly-detailed rather try to change the rules than Curtiss Hawk, a colorful Northrop build models to conform to existing PROTECTS MODEL A-17, a Hall racer, and a magnifi­ ones. Larry Williams puts it this way: & TABLETOP cently-flown Fairchild PT-19. The “Some modelers go to great lengths latter was a Mammoth scale, at 3 to avoid going to great lengths. · inches to-the-foot, and seemed little affected by the gusty wind. This Instructor.... Continued from page 25 was our first opportunity to witness Mammoth Scale models in direct more critical, and consistency is the competition with the more usual name of the game. COVER size examples, and our reactions Enough theory; now to the prac­ LETS YOU were quite favorable. It would tical side of tuned pipes. Most tuned CARRY appear that the realism of the larger pipes are similar in performance, so the same basic set-up can be used TRIMIT IN models is not simply a question of YOUR POCKET "Reynolds Numbers”, as some have with them all. The proper length on suggested. Rather, it is a combina­ most .60 engines, measured from the tion of things, including sound, center of the piston through the steadiness, and relatively slow flying centerline of the manifold and pipe speeds. Too many small R/C scale to the high point of most pipes, is aircraft are far overweight and over­ approximately 12 inches. The only powered, yielding pylon racer-like exception I’ve found is the E.D. speeds, totally out of keeping with pipe, which likes to run longer realism. Yet, certain of the “normal- (approximately 13 inches). T-SQUARE size” models did have more opti­ After initially setting up the pipe, HEAD RUNS mum wing and power loadings, as we are now ready to adjust it for SMOOTHLY well as efficient mufflers, and audi­ fine-tuned performance. I’ve found ALONG EDGES ence response clearly showed the that, if the pipe is too long, it will recognition of the difference! cause the engine to go very rich at OF M00EL. NO Another entertaining spectacle the bottom of a split-S, where you MORE WOOD NICKS! was the arrival of the “ Noon Balloon usually enter your maneuvers, or it from Rangoon.” Its commander will go very rich at the bottom of a took Pat Rotega’s charming assistant full-throttle loop. If the pipe is too aloft for some aerial photos of the short, the engine will tend to sag C O V E R IT E V contest site, and we enjoyed their lean near the tops of maneuvers, and the exhaust will “bark” quite 420 BABYLON ROAD opening conversation, which went HORSHAM, PA. something like this: “Will you take loudly at the bottom of a full-power JL me to Oz, Mr. Wizard?” “Well, I'll loop. If it exhibits neither ot these tell you Dorothy, it’s like this .. .” problems, then it must be pretty try slicing off enough of the trailing Ad-libbing at its finest. close to right! Some experts may edge of tne aileron to square-off this Our hosts for the Morgan Hill visit cringe at my method, but it has back edge. A sharp-pointed edge or were Russ and Lorrain Barrera, who worked for me, and it should work a rounded edge can cause flutter. own a lovely home not far from Hill for you. Keep in mind that the flying Dear Dave: How does rudder-only Country. Other guests included Mr. field you save by using a muffled work, and how much can be done and Mrs. Wisniewski, Mr. and Mrs. tuned pipe will probably be yours. with an airplane ecjuipped with John Pond, AMA Scale Rep. Frank Now I’ll answer some questions rudder-only control? C.B. Capon, and the Williams brothers. and sign off for this month. Dear C.B.: A typical rudder-only The conversation was fascinating Dear Dave: I’ve picked up a flutter airplane is trimmed to climb while and the refreshments superb. Later, in my new airplane that I can't cure. under power, similar to a sport free we adjourned to see the new Russ- I think it is in the ailerons, as that flight. The rudder is used, not only Craft M odel M useum , w hich is servo keeps stripping gears, but I to steer the airplane, but to control rapidly nearing completion. Direct­ can't be sure. Wnat do you suggest? the airspeed by spiraling the air­ ly adjacent to Hill Country, it will M.T. plane. Controlling the airspeed in provide an added attraction for all Dear M.T.: The first thing I’d try this manner enables you to do aviation enthusiasts. Russ tells us would be to seal the aileron gap; if maneuvers such as loops, barrel that it will have a new name, which this doesn’t cure the problem, then rolls, stall turns, etc. For example, NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 107 the loop the airplane, you would spiral to increase airspeed and then CONTROL HOOK-UP ACCESSORIES neutralize, causing tne airplane to pull up into a loop. To roll the NY-STEEL KWIK-ROD ASSEMBLY« airplane, you would do the same 52 3 = ^ thing, but apply full rudder when No shrink - no stretch, free running fully adjustable at the nose comes just above the control horn. Strong, simple and easy to install. Hot, wet horizon. A few years back, when or cold days won’t affect trim setting. Complete 31” rudder-only was a competitive event, I remember seeing Harrison assembly with Kwik-Links. n o . 1 0 2 ...... $1.49 Morgan doing very nice four-point rolls with his rudder-only ship. That LARGE THREADED DU-BRO KWIK-LINKc would amaze most fliers today! CO U PLER S Cat No. 212 The tried and true Send questions (PLEASE) to meat: spring steel 8534 Huddleston, Cincinnati, OH Kwik-Link. Ideal for 45236. · These new threaded couplers are now any control linkage. designed to lit perfectly on Kwik-Lmk 2 each. Nats Scale .... Continued from page 30 rods and Ilex cable 5 lor only S 1 .20 No, 109 . · · · 75cJ by Doc Martin’s Wyman Lepere WEL DU-BRO FLEX-CABLE 10. Excellent performances were 20" made by seniors Nick Decarlis, with MOTOR CONTROL a Fike (first), and Guy Larsen, with an Provides the ultimate He-100 racer. In junior, Dan Isaacks in control cable ‘S - assembly. Highly won, followed by Andrew Stark's flexible, free running and adjustable at Hellcat. control horn Peanut was also well represented No. 1 6 5 ...... S1.49 by low-wing models, with at least three of the first five places in Open NYLON BELLCRANK STRIP AILERON . going to low wingers. Clarence LINKAGE Mather’s Davis won, followed by ASSEMBLY Charlie Sotich, Ron Robertti, Tom 90° Nylon HOOK-UP Stark, and Mark Valerius. Senior was Bellcrank with Complete fully adjustable won by Glen Anderson, then Nick Brass Bushing, 22-pc. Decarlis and Guy Larsen with a Peck 4-40x%" Bolt, set. Polymer P-51. In junior, it was Tom Washer, Lock Comparet in first, and Dan Isaacks in Washer and second. Nut. 2 each per Can Set. INSIST be used OUTDOOR PEANUT SCALE ON THE on any The big news in Outdoor Peanut high, mid was that it was won by a gas engine- FINEST! or low wing powered model! Mike Fedor’s 167 75* plane. nicely-built B-70 bomber, powered by a Cox .010, overwhelmed most of the field with a four-minute-plus NEW E-Z CONNECTORS flight. However, Wales Thomas, WE HAVE INCLUOED IN EVERY PACKAGE OF E-Z CONNECTORS 2 OF OUR NEW NYLON flying a Fike, came close with SNAP-ONS ESPECIALLY MADE TO HOLO another four-minute-plus flight, Still TIGHT ON ANY SIZE CONTROL ARM. THESE NEW SNAP-ONS CAN SAFELY BE USEO OVER depending on a thermal instead of a only AND OVER AGAIN FOR THOSE OF YOU WHO STILL PREFER A PERMANENT INSTALLATION. large fuel tank. Tom Stark placed 98« Pr. JUST PEEN ON THE WASHER AS BEFORE YOUR CHOICE - . third with his unusual Heinkel He- C a t. N o . 121 119A, followed by Fred Anderson > - and Charles Puckett. In Senior, Nick DU-BRO NYLON HINGES Decarlis was first with a beautifully- Easy installation. Embossed built Mooney-designed Found 100, letters and holes make a followed by Glen Anderson in better gluing surface. 5/8” x 1-118" second. Dan Isaacks won first in open. Hinge pin locked in place. junior, and Tom Comparet placed No. 116 ( 6 each I S1.10 ( MINI \ No. 118 $1.00 second. The win by a gas-engined No. 117 115 each) $2.49 V S IZ E ) No. 119 S1 .95 model brought promises by several >= people to submit rules change pro­ NICKEL PLATED SOLDER LINKS posals to limit the event to rubber- MAKES A STRONG. ATTRACTIVE AND EASY TO powered models. SOLDER CONNECTOR FOR SERVO OR HORN NICKEL PLATED FOR A BRIGHT AND SHINY FINISH— OUTDOOR RUBBER SCALE A NICE IMPROVEMENT OVER TIN PLATING WHICH WILL EVENTUALLY OXIDIZE AND CORRODE The day started out with a rain PACKAGE INCLUDES 2 SOLDER LINKS AND storm, but by about 9 am, the sky 2 LINK GUARDS No. 112 (2 ea.) 69c cleared and the weather was nearly perfect. Low-wing airplanes were very much in evidence, as exempli­ DU-BRO PRODUCTS fied by Don Srull’s first place­ INCORPORATED winning Schlepp (a Swiss target tug), 480 Bonner Road W auconda, Illinois 60084 U S A Rolfe Gregory’s fifth place Heinkel He-100, senior Guy Larsen's second

108 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER place Miles, and junior Andrew Stark’s second place Hellcat. The heat warning Trouble getting \ Nick Decarlis continued his sweep indicator! it together? of the scale events by winning Stik-it! is an adhesive that's Senior, while William Langley won HOT Hot-Hed takes the guesswork moldable, reusable, fuel proof- - Junior with a soon-to-be-released out of engine settings and a million and one uses for held cowling air flow A visible and bench. Won’t let go until SIG Wittman Tailwind. Allen heat indicator applied in dots, you want it to. Residue easily Schanzle placed second with his Hot-Hed changes color when removable with lighter fluid. little (13-1/2-inch span) Chamber­ engine gets too hot. maid, followed by Tom Stark flying a $3.00 per half oz. bottle Tailwind, which is the prototype for ( Comes with instructions) the SIG kit. Larry Kruse place fourth with a beautiful Monoprep, which earned highest scale points. Al­ FORMICATOR though there was some thermal activity, it appeared that most of the winning airplanes depended on $2.00 per two foot roll consistant performance instead of a (A lifetime supply!) lucky thermal. ·

Mammoth .... Continued from page 25 If modelinggenerally has something to w orry about, it is the instant Vacuum former for plastics— Easy to make your model. I use the word “ model” own cowls, wheel pants, canopies, etc. Works loosely. No wonder Customs agents with home oven and hose type vacuum cleaner. around the world refer to our air­ $39—(Includes Asst. Pack of A B S ) HYDRALOCKS Hydraulic unit converts air craft as toys! These items are sold by ( Instructions for assembly and use included) driven retracts to hydraulic toy store outlets which offer no operation. Adjustable to give guidance, or in any way refer to the realistic retract speeds stops gear “ sag-out” and landing — basic responsibilities required in the PLASTIC Bulk Packs collapse. Use one for two wheel models' use. They are operated on ABS Plastic Sheets for the Formicator— ships, two for three wheel school grounds (complete with A ll sheets 8V.z" x 1 7 "— Packs Only type planes. kids), parks, approaches to full-sized PCS. PACK $8.00 per unit runways, adjacent to freeways, and, THICKNESS PER PACK PRICE {Complete instructions included) heaven forbid, within shooting- .020(1/50")...... 30 $13.00 down range of regular model fields. .030(1/32")...... 20 13.00 N ow ... A PVA In my opinion, these constitute the .045 (3/64")...... 13 13.00 you can .060 (1/16") ...... 10...... 13.00 biggest hazard to the continuance obtain! of our sport/hobby that there is. .090 (3/32") 6 13.00 Mammoth Scale models are going Assortment Pack (see below) 13.00 One of the hardest things for Assortment Pack contains.* 6-.020/ 4-.030/ 3*.045 the hobbyist to find is PVA to help separate the hobby from 2-.060/ and 1-.090 sheets. Any pack $12.00 when (Polyvinyl Alcohol)— the only ordered w ith the Formicator. ALL ABS is white only. suitable mold release for fibre- these toys. glass and epoxy. A dry PVA One enterprising Canadian I Over 3]/2 lbs. per pack that is mixed with water, heard about is way past the talking Kant-Stik is a superior mold stage in building a permanent air­ release of highest quality. port with hangar facilities for large * ALL U.S. ORDERS SHIPPED $4.00 per one p in t m ix POSTPAID SAME DAY RECEIVED models, dual-control trainers, full­ (Complete instructions time instructors (who also double as for mixing and use) repair men, when not instructing), QUALIFIED DEALER an aircraft rental system for model INQUIRIES INVITED At Your Dealers, or pilots (who are checked out first, as Order Direct From in full-sized aircraft), coffee shop, Send self addressed stamped envelope Idea Development. Inc. club house, model shop, evening for further info on products P.0. Box 7399 construction and maintenance Newark, Delaware 19711i classes, rental tool shop and build­ ing area, and family picnic area. Far 3. Flanged bearings 3/16 in. and scale and wants some ideas, phone out? I wonder. Cash outlay is less smaller, also some up to 5/16. me at (604) 542-4151, as our mail is so than a few beat-up full-sized trainer 4. Good auality decals suitable heavy that I won’t have time to give aircraft, and overhead is very low. It for Mammoth Scale at a reasonable your letter the attention it would wasn’t practical until the Mammoth price. deserve. If you want me to evaluate Scale models came along, as oper­ 5. Vacuum-molded 1/4 and 1/3 something and can stand criticism, if ating costs were too nigh with scale pilots which look real, not like necessary, shoot it to me prepaid. If standard models. a cupid in street clothes. it’s good, Model Builder will tell the Help! Help! Help! We need the 6. Quarter and third-scale instru­ world. If it needs improvement, following: ments, landing lights, navigation we’ll check with you first. At any 1. High grade spring steel wire lights, fuel caps .. . doggone it, if rate, phone us first to see if we can heavier than 3/16 in., in straight somebody doesn’t pick up some of get at it during your time structure. lengths, hopefully four feet and this stuff that people are hollering longer. At this point, I would like to clear for, I’ll have to do it, and I’ve got something up for modelers. Eval­ 2. Duke Fox has promised some more to do than I can handle now. decent wheel collars in larger sizes uating a product is work, and takes ... hope he doesn’t get bogged If someone out there wants to time and money. The product, when down on this. produce something for majestic tested to the end of its useful life, is a NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 109 MIKE REAGAN AND HIS PARAGON AND THE TROPHIES HE HAS WON IN 1-1/2 YEARS OF FLYING HIS PARAGON IN CONTESTS NOW WE ALL KNOW THA T FLIERS WIN CONTESTS. AND MIKE ISA GOOD FLIER, HOWEVER, BEFORE MIKE SWITCHED TO THE PARAGON, HE JUST WASN’T ABLE TO GET ANY HARDWARE . . . SO, YOU CAN DRAW YOUR OWN CONCLUSIONS. OTHER PARAGON WINS: First in Open Class — 1977 AMA Nationals (Pat Potega) First in Open Class — 1977 Southern Calif. L.S.F. Tournament. (Phil Harris) First Place — 1978 Annual North/South Challenge Contest. (Bill Nibley) S T IL L O N L Y $5995 Span 118 in. Area 1080 sq. in. Weight 48 oz. Wing Loading 6.3 oz./sq. ft. Complete kit, with precision cut parts, all hardware, strong 3-piece wing. PIERCE AERO CO. 9626 Jellico Avenue, Northridge, California 91325 Phone (213) 349-4758 piece of junk with no value. If a no wind, and they weigh approxi­ a decent wing area, your model with product survives a complete test, it is mately 40 lbs. with a full load. Wing power similar to the Quadra will be unlikely that an evaluator will use it. area is 2160 square inches, Clark Y sport aerobatic. If drag is low and it’s More likely, he’ll go out and buy it, airfoil, 10° dihedral, dolly landing a clean-flying model, it should have and give it the care a fine product gear, Du-Bro 6-inch wheels, ana contest pattern capability even at 24 deserves. Quadra engine swinging an Airflow lbs. Ideally, for aerobatics, the I’m amazed at how well the new prop at 7800-8000 rpm (static). Field weight should be kept to less than 20 expanded Model Builder is being condition is very rough with 2 inches lbs. The lightest practical aircraft received. The only complaint I’ve of grass. Their performance in the powered by a Quadra or similar heard is that they are not filling the air is like a loaded cargo ship, and powerplant has been 14 lbs. Below additional copy orders fast enough. they can fly and barely maintain that, you just don’t have enough Although this is a compliment, it is a height at half power. Controls are to structure. growing pain that I'm sure Model the rudder, elevator, and engine. A landing gear/wheel combina­ Builder is trying to correct as fast as The takeoff roll could be greatly tion capable of adequately handling they can. reduced if bearings were added to your model can easily weigh 2 to 3 Tne most frequently asked ques­ the wheel hubs; also, soft tires lbs.; you will rapidly find out that tion that Mammoth Scale builders generate considerable rolling resis­ some of the crude gear our standard have is whether their aircraft is too tance at that weight. If you’re flying models were equipped with just heavy, too light, or strong enough a heavy model on a araggy field, don’t hack it, and tne poor engi­ for tne performance they require. spend some time getting your gear neering we used then just isn’t These questions are almost impos­ rolling with the least resistance practical. Here are some rules of sible to answer, because each com­ possible. It can eat up a lot of power. thumb to keep in mind: bination has a different result. The Our Thunderbird takes off easily 1. Minimumaxlediameteris3/16- nimbleness of the same model can in 60 feet, with no wind, weighs in at inch high grade steel; 1/4-inch turn one flier’s knuckles white, his 22 lbs., and uses the same engine would be far better. knees to jelly, and cause him to and prop. Fox wheels would cut the 2. The landing gear leg length cease breathing for the duration of takeoff run appreciably, due to the should always be snorter than the the flight. (I wonder if this could freer-running aluminum hub. With torsion length (if torsion sprung cause brain damage?) On another its fully symmetrical 15% airfoil and gear). If it isn't, your gear wonl modeler, it would bring a satisfied 1450 sq. in. wing area, it will do spring back on hard landings, as the smile while he wrings it out. It’s about 1-1/2 turns of vertical roll leg will bend before the torsion obvious that we need some standard from level flight and 100 to 150-foot portion twists. If your gear seems to judge these things by, so I’ll give round loops. Landing speeds can be too spindly or soft when you follow you some known facts that you can ridiculously low. It will knife-edge that rule, either increase the wire compare your model to. but not climb out at that attitude. diameter or add extra wire. Our shoulder wing drones are Generally speaking, if weights are 3. Whenever possible, w hen able to take off in about 90 feet with kept down to 24 lbs. or less, and with mounting torsion-type gear in 110 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER A BREAKTHROUGH IN SERVOS!

Ace R/C is proud to announce a new member to the family of servos in the popular Digital Commander line of radio equipment kits, the Bantam Midget. A brother to the Bantam servo (which has been a respected name in servos for years), the Bantam Midget is considerably smaller and lighter, but boasts the same torque and gear strength as its big brother with even a bit more speed. Notice the extremely low profile-important when interfacing the elevator and rudder servos with the aileron servo and linkages. Reread the above paragraph then consider the fact that the Midget offers a servo that is in the micro-miniature category but also has the power and strength for .60 powered pattern ships! Truly a universal servo. A Signetics 544 1C, external driver transistors, quality plastic conductive element pot and other components make a combination that has become synonymous with Ace R/C and Digital Commander servos. Servos that have "Competition Grade" performance with an economical price tag. The Bantam Midget will work with any modern positive Size: Height-1.125" Length-1.43" Width-0.6" pulse system. For negative pulse systems (ProLine, etc.) a pulse inverter (14G18-$2) is required for each servo. Weight: .85 oz. (24 grams) A rotary wheel, extended arm, and an adjustable arm are furnished. No connectors are furnished with servo kits. Thrust: 20 in. oz. All of our flite packs and complete systems are available o with the Midget option. Transit Time: Under .5 sec. for 90

14G20R--Bantam Midget, Kit $23.95 14G20RC--Bantam Midget, Assembled $28.95

Plesu und me your complete cstelog. Enclosed is Si .00 winch is refunded on my first order. (Add S .50 for 1st dess mail return: add S I.00 handling on all other ordert.) ST ATE BOX 511H, HIGGINSVILLE, MO. 64037^

wings, spanwise, try to mount the angle bends we're so used to putting pending on a very small area, nor­ gear so that the torsion runs across into the wire right at the highest mally a glue joint, to hold that block the center section; it will actually aid oints of stress . .. where the leg in place in torsion or vertical loads. in strengthening the wing joint, ends for the axle, or, worse still, In either A or B, with tricycle gears, rather than providing a shear point Ewhere it bends to fit into the gear it’s a good idea to bend the leg right at the wing saddle. retaining block. Another problem slightly back, in case you perform a 4. Use wheels that absorb shock we experience (especially with tail- beautiful full-stall landing a few feet even when cold. Some wheel pro­ draggers) is that the leg angle and above the runway. For taildraggers, ducts on the market have about as the touchdown angle in a full-stall look at Figure B and note that the much give in cool weather as a landing could be identical, resulting lower end of the gear is curved manhole cover, and as much firm­ in the gear not being flexed, and the rearward. This feature, often found ness as a burnt marshmallow when only shock absorption would be in on full-sized aircraft, has a tendency it’s hot. If the tire has enough the tire itself. Spend some time to transfer vertical shocks to the volume, it's amazing how little looking at Figure A (our standard horizontal plane, allowing the pressure you need to adequately gear attachment) and you will soon springs to work. The torsion bar can support an aircraft of 30 lbs. The tires see what I mean. If you really think also run forward, and the anchor should only have to support the about it, it's even a poor design for end can run spanwise to suit your aircraft and take out tne minor the standard-size models. aircraft. shocks. The major ones should be Figure B shows a combination coil It should be pointed out that taken out by the gear. Don't worry and torsion bar arrangement that Figure B’s gear, if wing mounted, about the low bounce wheels ... a can give movement in all directions. should have sub spars or spar dou­ tire that has some give or bounce This is only one of many possible blers that extend just beyond the works fine, as there isn't enough designs. The gear leg is bent around ear mount, and the coil should energy released after a complete the wheel to allow the load to be ave room to operate. If-you have compression to throw one of these placed closer to the bearing surface. problems with the coil spreading, man-sized models back into the air Note the “rfpout” leverage available rather than the torsion operating, a on a rough landing. What you're in Figure A. In Figure B, the coil hard rubber insert can be installed striving for is a landing gear assem­ takes the rearward shocks on both 2 in the coil opening, retained by two bly which will givequitea movement and 3-wheel arrangements. The large, flat washers the same size as in all directions, but also come back torsion bar portion takes side loads the coil’s outer diameter, and a bolt. to its original position without which would result in bent gear legs Note also that the coil or bent leg bending. in our standard set-up. The torsion can be hidden by wheel fairings, The danger of folding your pre­ bar also has an important second pants, etc. Now you know why I sently designed gears sideways is a feature, in that it has less tendency need larger diameter gear wire! The real problem, and one which is to rip out its longer base. Look at larger automotive spring shops certainly aggravated by the right Figure A ... you are usually de­ either have it or can advise where NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 111 Sail Boat Enthusiasts and Experimenters ...... This unit is suitable for a sail control winch. This is a heavy duty unit which could be used for many other applications. DC motor with gearbox 6 VDC will produce approximately 250 RPM. Contin­ uous duty. Reversible. Motor may be operated from 2 to 12 VDC providing speeds between 50 and 500 RPM. Overall dimensions motor and gearbox 5" long X 3-1/2" deep by 2-1/8" high. Shaft 3/16" diameter x 1/2" long.

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It will be a much better article if we during those months. Painting is wait for their return to work. Please usually left until early spring. The ITodor H A R D W A R E bear with us. · humidity here in the Mid-west is very • WORKING TURNBUCKLES low in the winter (around 20%), and • RIGGING & CONTROL CABLE Pylon...... Continued from page 37 zooms up to 70-80% in the spring. *· CONTROL HORNS /*> ; Now the problem: here we nave a • STRUT FITTINGS be worked out, better competition, finely-finished airplane, and as soon • SHOCK CORD and more club money being spent as the paint hits the parts, sanding • COCKPIT TRIM to finance better equipment. scratches appear as if by magic, or at • P U L L E Y S As I said, this is not a one-and-only • INSTRUMENT HOUSINGS least I thought it was magic. Not only cure-all for the current lack of does it ruin the looks of the airplane, ··___ - ·' participation, and I don’t mean to be but it destroys the expectations I the Prophet of Doom. I love racing built up over several months in my §.end S i.QQ to and everything it means. This idea mind’s eye. All this time I put the IT octO f ENT. CORP. doesn't leave out the smaller clubs, problem down to humidity prob­ P.O. BOX 9641 nor does it mean no normal-size SAN DIEGO.CA.92109 lems (and magic). races . . . we still need that. But Well, the other day I was picking maybe if two or three geographical­ up my favorite paint down at the you can obtain some, until we get ly close clubs pooled their efforts automotive paint store, when my some enterprising model supplier and resources, things could be eye caught a brochure put out by to fill our needs. worked out. Maybe one has a super the DuPont Company. The follow­ The wing connector drawing was flying site but not the ability that a ing is part of that brocnure, and I can submitted oy Max Kremke, 2 Con­ club 75 milesaway hasfor putting on testify that it is the answer to the dor Circle, Willeton 6155, West a contest. Jot down your experi­ problem of sand scratches, at least as Australia. I think No. 2 would be the ences as a contestant or contest I’ve experienced them. one most used (production, any­ sponsor and send them to me . .. "Primer-surfacer is the shop one?). The joiner-nut lengths will be don’t just watch it happen. Bang the material that is perhaps most sus­ determined by the screw thread Drum Slowly? Maybe, but at least ceptible to changes in temperature, difference, ana trial and error. As with a beat. as evidenced by the phenomenon shown here, the threaded joiner SAND SCRATCHES IN known as sandscratch swelling. would have to be threaded off YOUR PAINT FINISH toward one side, that panel re­ Over the past few years, a prob­ moved and then the joiner threaded lem in my paint finishes has oc­ off the other side to remove the curred on a rather consistent basis. I remaining panel. Seems to me that if put on two coats of K&B primer, the a sleeve or bushing larger than the first being either wet or dry sanded ioiner-nut were placed at the rod’s with approximately 180 grit sand­ oase permanently, the joiner would paper, and the final primer coat remain on the fine thread side being sanded with 360 or 400 grit Primers that dry too fast "bridge" cracks without having to remove it. I would paper used wet, prior to application (top). This may cause flaw in the finish. also think it would be a good idea to of the paint coats. At this point, one Proper drying will fill the gap (bottom illus­ bush the fuselage where the could hold the airplane parts up toa tration). Du Pont recommends 3661 S threaded rods enter, to prevent strong light, and tne surfaces would Lacquer Thinner. wear. I would like to see thestruts, if all appear to be filled, with no low "Sandscratch swelling is often used, working and not only for spots or seam lines showing, and a caused by the ‘bridging’ of primer- show. I guess that’s what makes flat, smooth surface would seem to surfacers. This occurs when the Mammoth Scale interesting . . . new indicate a favorable condition for a primer-surfacer does not complete­ problems, new ways to solve them, flawless paint job. ly fill an imperfection in the surface, and modelers helping each other Another factor comes into play such as a scratch or grinder mark. (that’s the best part). here; the major construction of “These flaws must be filled from The Quadra factory took a holiday airplanes in my shop is done during the bottom up. If a primer-surfacer during the time we intended to the winter months, and the amount dries too quickly, it will not flow to write up the repair and overhaul of balsa dust in the air precludes the bottom of the scratch. Instead, it article we promised on the engine. using the shop for painting purposes builds a ‘bridge’ across it. The top- 112 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER $44.95 Without Accessories Sushwacker $52.95 With Accessories A transition trainer for the modeler who is tired of slow, boxy trainers, or who is proficient with sailplanes and wants to try power. Ailerons provide the extra control that make R/C power flying more fun. Bushwacker is capable of performing the full stunt pattern, yet she will "turn on a dime" and land like a feather. If there is no runway, you can remove the landing gear in 15 seconds and hand launch the plane. The kit is available in two versions — with and without accessor­ Wing Span ...... 68.75 in. ies. Wing Area ...... 555 sq. in. Power ...... 15 to .19 cu. in. [f^ ARK's R o d els .,, Weight .. 3 lbs (.15 cu. in. dry) P.O.Box 2134, Escondid^, Calif. 92025 coat solvent can then flow into the IN STOCK FOR IMMEDIATE SHIPMENT unfilled flaw and a swelling or Plug Sparks . .. Continued from page 52 'scratch' will form. QUADRAS S I 09.50 “ That’s why you should avoid fast- ionships could be put on without aving to go to a higher entry fee. ZINGER. GRISH. & TOP FLITE PROPS flashing thinners during hot (18 8, 10; 20 - 8, 10; 22 - 81-10% off weather, and you should thin the This was in response to a proposal by primer-surfacer 150 percent, instead Woody Woodman, who outlined PUNCTILIO PROPS (18-6 only) S5.50 some of the deficit encountered in of the usual 100 percent. (Remem­ DU-BRO BIG WHLS. (4-6" dia.) 10% off ber, a 150 percent reduction is three this SAM Champs. parts thinner to two parts primer.) A formal motion was made to CONCEPT MODELS' "BIG FLEET" Du Pont recommends 3661 S Lac­ have the next SAM Championships (1/4-scale for Quadra) S179.95 quer Thinner, a good summer sol­ in 1979 at Salt Lake City. This was 24-Hour Service. . . We pay all postage vent, for primer-surfacers. resented by the President on be- on orders over $20.00.. . Send Bank Check or Money Order to: “There are several advantages to alf of the SLAM (Salt Lake Aero increasing reduction to150percent: Modelers) Club, which was bidding JIM MESSER'S “The primer will be smoother, for the 13th Annual SAM Champs. QUALITY MODEL PRODUCTS meaning less sanding will be Inasmuch as the Rocky Mountain 106 Valley View Dr., needed, and the possibility of Area was scheduled to have the Allegany, NY 14706 ‘primer blushing’ will be reduced. Champs, and no bids had been As a result, less sandpaper will be received from the Denver Model used. Museum, the motion was passed choke control, will now manufac­ “ Less primer-surfacer will be unanimously. Lin Haslin, Rocky ture a new "Special” (without choke needed. Mtn. Veep, is to be notified. control and no spark plug), and a “ Primer-surfacer will dry faster The meeting then broke up, with “Classic”, with metal tank, choke than when it is thinned 100 percent. most members departing to get a control, wooden mounts, and fin­ “Most importantly, there will be good rest for the next day’s flying. A ished in 24 kt. gold!! fewer problems with sandscratch Few die-hards stayed to hold post­ The assortment of Wahl Brown swelling after topcoating with mortems on the meeting. In retro­ engines will line up like this: color.” spect, the biggest item had been Wahl Brown Jr. Classic .... $169.50 You’ll have to experiment to resolved; i.e., the elimination of Wahl Brown Jr. Custom .. . $139.50 determine the proper amount of easy rule changes. Wahl Brown Jr. Special .... $119.50 thinner to use (eitner K&B epoxy BROWN JR. MOTOR ROUNDUP Advance orders can be placed with a thinner or Du Ponťs 3608S lacquer While at the SAM Champs, the deposit of $40 per engine. thinner works fine), but start out by columnist noted that Herb Wahl was MORE MOTORS adding approximately 25% thinner displaying a full line of his Wahl- Also noted on the field was a to your mixed two parts of primer. It Brown Jr. motors. Wahl, operating selection of Orr Tornado engines really helps. under the name of Herb's Model and parts. Although the columnist Now is the time to get those race Motors, Box 61, Forksville, PA 18616, took pictures of the engines and reports sent in, and also your ideas will offer three versions of the Wahl parts, a faulty rewind mechanism of how-to articles and the like that Brown Jr. engine, beginning late in destroyed the film. you would like to see over the long 1978. Arthur DeKalb, who has pur­ winter months. If you would like to The three motors to be offered chased the entire Orr Engine pro­ share any ingenious ideas or dis­ will be quite similar to the versions duction of motors and parts, is coveries you've made, send them originally offered by the Junior offering the Orr 65 for those inter­ also. The address is 3727 Shepherd Motor Corporation in 1940; i.e., B, ested in augmenting their collec­ Lane, Fort Wayne, IN 46815. C, and D models (in order of de­ tion. This is not to say the motor SEE YOU AT THE RACES!!! · scending cost). won't be a good runner, as there are Herb, who has been producing numerous wins and testimonials the Wahl-Brown Jr. Custom with credited to the performance of this NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 113 HOBBYPOXY FORMULA 3 1 bobbypoxy THIXOTROPIC 3 FORMULA EPOXY GLUE thixotropic NOSAGS... EPOXY GLUE V V V NORUNS... NO D R IPS...

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engine. extra tables always has to be set up. 1. Larry Boyer Those interested in the Orr 65 This year was no exception, and 2. H e n ry H ill should write to Arthur Dekalb, c/o things got a little warm with all the 3. Jo h n Lessig Precision Service Co., 10189 Crane bodies in the banquet. Finally got 4. Karl Spielmaker Rd., Lindley, NY 14858. the air conditioning unit into high 5. W illia m Jordan MORE GOOD STUFF 30 SECOND ANTIQUE gear to save the day. 1. Sal Taib i Seems like the SAM Champs are Woody Woodman ran the ban­ 2. Jim Perrson always an excellent vehicle to dis­ quet and seating facilities. Directly 3. To m A ccavatti play your new ideas, and John Kungl in front of the speaker’s table (whicn 4. Larry B o yer is no exception. included all SAM officers) were two 5. G e o rg e Arm stead The new "Modeler's Swap Sheet” tables; one for the Army, and the CLASS A CABIN (now in issue No. 2) is the latest idea other for Miss SAM Champs and the 1. tarry Boyer by John Kungl to get modelers outstanding old-time members. 2. Don Assel together with items to sell, trade, or Woody made a particular point of 3. Jack C h ilm a rk 4. Jim R o b in so n borrow. John is offering the first two thanking Major Seymour for the 5. Ben B u ck le issues for FREE, in order to get the help and cooperation of the U.S. CLASS A PYLON Swap Sheet really rolling. Army in using the Coyle Air Drop 1. M itch e ll Post me "Modeler s Swap Sheet” is a Area. Free Flight areas are very hard 2. Joe Beshar biweekly publication strictly for to find in New Jersey! Hope the New 3. Jim R o b in so n modelers who want to swap or sell Jersey boys are able to keep this 4. Jack W hittles their unwanted model gear. Sub­ spot! 5. To m A ccavatti scription rates are 4 issues for $1.00, CABIN RUBBER After several acknowledgements 1. Ron Sharpton 13 issues for $3.00, and 26 issues for to the various luminaries attending $6.00. Advertisements are 102 engines. 2. Ed N o vak CO M PLETE A CCESSO R IES: Japanese tis­ 3. Tim Banaszak sue in silver, black & colors, imported rub­ 4. Jo h n Stott ber, props & accessories, Megow, Continen­ 5. Gene Collins tal & Ideal replica kits, books. Peanut balsa, plans, and morel RADIO CONTROL O/T CLASS C GLOW CATALOG $1 -THIRD CLASS RETURN. k FOR MORE INFORMATION WRITE:______NP476-2, 56 pages of the finest models & supplies: in­ 1. H u g o M e rco li cludes F R E E Peanut plana plan. / O M IS 0 H M O DEL P R O D U C T S 2. Esio Grassi Send S.A.S.E. for current price list 3. G ary M ontana { J 6929 WEST 59TH STREET CHICAGO. ILLINOIS 60638 · (312) 586 7101 4. Jim C la rk AIRCRAFT MODEL PRODUCTS 5. Dave Jagge BOX 318, S C ITU A TE , MASS 02066 CLASS C IGNITION intentional. This old man can only 1. Ted Katsanis write so fast! 2. Larry Fair R/C CLASS A-B IGNITION CONTEST PICKUPS 3. C liff Sch aib le 1. Joe Sm ith Those fellows remarking on how 4. Tom Accavatti 2. Joe Beshar 5. Fred Q u e d e n fe ld well Larry Boyer’s Bunch Tiger ran 3. C liff Sch aib le might do well to copy a few of his R/C CLASS B GLOW 4. To m A ccavatti 1. H u g o M e rco li 5. Ken Hinton ideas. First off, he uses an extra leaf 2. Stu M urray .020 REPLICA R/C on his timer (this was actually a 3. Tom Accavatti 1. Dave Jagge standard accessory item in the old 4. G e o rg e H aley 2. Stu Murray days) that prevents point “ floating” 5. G a ry M ontana 3. Fred Koval at high speeds. This allows Larry to T E X A C O R / C 4. Tom A ccavatti use a 10 x 6 prop, which really gets to 1. Jo h n Pond O/T ELECTRIC R/C turning up. 2. G e o rg e H aley 1. John Pond 3. Jack V an D u sen 2. Joe Beshar Bill Henn Sr. was just busting his 4. Pete V an o 3. To m W ro b buttons when his son, Bill Jr., beat 5. C h e t Lan zo SPECIAL PERPETUAL TROPHY AWARDS him and a flock of other fellows in R/C CLASS A (GLOW) Twin Pusher ...... D ave D o d ge the Rubber Stick event. John Stott 1. Stu Murray Class C Cabin F/F ...... Larry Boyer 2. To m Accavatti narrowly nosed out Junior and Pond Antique ...... Larry Boyer saved face for a lot of older guys. 3. Bill H aley Shailor Class B ...... Mitchell Post 4. M ik e Lach o w ski F/F Grand Champion ...... Larry Boyer Missed the Indiana-Ohio boys 5. Joe Beshar Beshar-Woodman R / C ...... Hugo Mercoli this time. Thought for sure that the R/C ANTIQUE R/C Grand Champion ...... Tom Accavatti unholy triumvirate (“Dirty Harry” 1. Mike Lachowski Sp cl. T ro p h y (Freq. C o n tro l) ...... Jack H ill Murphy, Bill Burgess, and Bob Larsh) 2. Esio G rassi If we get any more perpetual tro­ would show. Guess they were saving 3. G e o rg e H aley their models for the big Wright- 4. Jim C la rk phies, we can have a contest for 5. To m Accavatti these alone! Furthermore, if we Patterson meet. You boys missed a forgot to mention anyone, it wasn’t goodie! NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 115 X 1/8 balsa. Although it doesn't show .uthorizecT" FA CTOR Y A U TH O RIZED S E R VICE in the top view, all the bottom cross FOR ALL OF THE FOLLOWING BRANDS pieces (except at the very front) R a d i o should be 1/16 of an inch shorter Ace* Cannon Cirrus EK Logictrol than the corresponding upper one. (T^ontrol Pro Line* Mathes* RS* Micro Avionics Cut the fuselage formers from Royal Orbit D & D World Engines sheet balsa and add them to the s e r v i c e Simprop Kraft* Jo M ac fuselage box. Add the stringers aft of the cockpit (5), and the two forward *ALSO WARRANTY SERVICE of the cockpit. Cut, fit, and hollow out the cowl pieces, and then EXPERT SERVICE ON ALL BRANDS cement them in place. There is a Chuck Moses Factory trained technicians with over vertical sheet filler outside formers Don McCarthy 15 years in Radio Control Electronics. A and B on top of the upper lon­ gerons, to help support tne wings. Make up the nose block and the HOURS: 10 am ■ 8 pm, Monday 8t Friday ... 10 am - 6 pm, Tuesday - Thursday plug, and cement them together. It (714)639-8886 915 N. MAIN ST., ORANGE, CALIFORNIA 92667 is usually a little easier to make the noseblock a little oversize and do the final shaping with sandpaper, («••ft I RitHi'l Peanut...... Continued from page 79 with the nose plugged into the front end of the fuselage. Sand the fuse­ Build the bottom surfaces of the lage structure to remove any bumps wings directly over the plan, by or roughness. laying down the trailing edges, rib Cover the major structural pieces bottoms, and the tips. Then cut out with your favorite material. The two spars to match the pattern, and model in the photos was covered cement them in place on top of the with silver japanese tissue. Water ribs. Block up the tips so they can be shrink the tissue, then give it a cemented to the ends of the spars. couple of thin coats of dope. At this Next, slice the rib tops from sheet point, add the insignia ana whatever balsa, and cement them in place on numbers you feel are required. The X top of the spar and rib bottoms. Profile article shows several color

flisi >·«!·■· I* ·· BIIIIIMI I kill ·» IliW i I ··» tit MUSIC I**"' Finally, make the balsa root fairings, schemes. The model in the photos CLASSIC ERA MOOELPLANS notch them to fit over the spar, and has wing insignia and rudder mark­ *...... " " * 355 Grand Bird.. cement them in place. Finally, re­ ings. The Cross is white, the outer UU.I n“ " Bedford Ohio 44 14 6 move the wings from the plan and circle is red. the next circle is white, sand them smooth, tapering the and the inner circle is blue. The The English boys came with the trailing edges to a triangularsection, rudder is blue uppermost, then neatest box ever seen. With most and the leading edges and tips to a white, and red. Control outlines are wings being shipped in halves, it was half-round section. made with a fine black pen. All the no great surprise to find all the The fuselage is a conventional color added to the model was done models of the ten-man team in said stick box, made with two sides that with felt pens designed for marking box. are assembled directly over the acetate sheet, except the white, THE WRAP-UP plans. The side structure is shaded which isn’t a color anyway. The Despite what fellows say at the on the plan for clarity. Pin the white on the model is liquid paper annual SAM Business Meeting, longerons in place and add the up­ correction fluid. It is very white, very where one could get the idea there rights. Make the hole for the rear opaque, and besides, it was handy at is a lot of discord, the main point motor peg before you install those the time. from this columnist's viewpoint is particular uprights, because it’s Install the landing gear wire in the that this is healthy. Anyone who is easier to do it now than trying to fuselage. Then add the wings and concerned about the well-being of make the holes after the fuselage is tail surfaces. Block them up with SAM has every right to express his assembled. When the sides are dry, books or blocks, so the cement will opinion ana solution for the remove them from the plan and dry with all the components proper­ problem. separate them by using a thin razor ly aligned. When we get to the point where blade. Lightly sand the two sides to Next, make the struts for the the President asks for new business remove any rough spots, and taper model. Obtain the model railroad and new proposals, and everyone the two tail posts so they can be basswood stock required, and sand sits back fat and happy, then tnat is cemented together at the correct it to the proper streamlined cross- the time to worry! An animated angle. Cement the two sides to­ section. Paint it with silver dope. discussion and participation by the gether at the tail posts, and block When it is dry, cut it to the right membership indicates a healthy them up so they are both vertical as lengths and cement it in place. Do attitude. This is what keeps an or­ they lay on their bottom longerons not cement the landing gear struts ganization on its toes! over tne plan view. Let this ce­ to the landing gear wire, just along­ In the meantime, as Pete Vano so mented joint dry thoroughly before side. Add the wire bracing to the tail. carefully pointed out, “We get adding any of tne cross pieces. The Poke a pinhole in the tail structure in enough problems during the rive proper alignment of the tail post the appropriate places, then thread days of the week, without carrying it joint is important for assuring an the monofilament line through the over on the weekend. Let’s remem­ accurate fuselage box, so check it holes and tie it under the fuselage. A ber what it is all about . . . FUN!” · carefully as you support the sides. drop of cement at each hole and Then add the cross pieces, cutting trimming off the ends at the knot them from 1/16 sq. balsa, except for •complete the job. the most forward one, which is 1/16 Finally, make the propeller assem- 116 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER bly. A small balsa rocket nose, avail­ an obvious weak point. The current able at the local model shop, was cut design, despite the usual encounters to length for this model. A 1/16-inch with trees and cars over a three-year EVERYTHING diameter hole was drilled in it, and a period, has failed only at the wing YOU NEED piece of aluminum tubing, filed to tip. Those apparently frail ribs, make a free-wheeling ratchet, was hollow T.E., ana butt joint dihedral TO KNOW bonded in place with “Hot Stuff". solutions are really OK, so long as The real plane had a nose cannon, so you attach the wing with rubber ABOUT the free-wheeler is allowed to stick bands. out a little. Two Sleek Streek plastic FABRICATING THE FUSELAGE ADHESIVES! propellers supplied the blades for Start the fuselage by laminating the model. These were cut off near the wing support section (stations the hub, and then bonded in slots six through nine) out of two pieces ZAP cut in the balsa spinner. A washer of 1/32 sheet. Use the rib templates World famous! The strong and a “ Peck-Polymers” plastic thrust to carve the proper shape into a one! The Iasi one! Holds button, in conjunction with a stan­ supporting block. When dry, cut the up to 2000 lbs. per sq. in. dard nose hook, completes the laminate to a width of a 1/4 inch. Bonds in Seconds. Patented Now build one side right over the clean hands applicator. Also assembly. available in ZAP GOLD, with A loop of 1/8-inch flat rubber will plan, in the traditional fashion. visible tracer. power the model. A smaller motor Note, however, that the vertical may be enough, if your model is supports lap the longerons. This light in weight. The model should means that the main longitudinal balance in a horizontal attitude stringer must go in before the when supported at the wing spar. If supports. When complete, you have it doesn’t, add modeling clay ballast the right side. To make the left side, X -30 at the nose or tail, as required. Start smear the plan with oil and turn it Second generation ZAP. over. You will see a ghostly image. High strength adhesive your testing by giving the motor PLUS 30-sec set time, about fifty hand winds. Adjust the With the aid of the old pin holes, allowing adjustment of tail surfaces so that the model does a work to make the second (left) side minor alignment problems. smooth, gradual descent with little similar to the first. Fortunately, great Higher viscosity for lilleting or no turn. Then, gradually increase precision is not required . . . the slight misfits. the turns in the motor. If the model fuselage is so large that errors of as shows signs of stalling under power, much as 1/16 inch cannot be seen in add a shim to get more downthrust. the final product. ZIP Similarly, use sidethrust to eliminate Join the sides in the usual fashion, any violent turning tendencies. The except for two factors: the cross EPOXY members lap the vertical supports, Pacer s premiere ideal flight would be a gently- epoxy. The five turning, climbing circle, followed by and many of the upper cross mem­ minute bonding a gently-descending wide circle. bers are only temporary.Temporary agent that means The motor should run out of turns upper cross members (stations one business. From through twelve) will ultimately be chemistry to about the same time the model is simplified appli­ landing. Experiment with motor taken out to clear the motor. Attach cation technique — I lengths and sizes and with thrust temporary members with a light dab the Cadillac ol epoxies. adjustments, until the model flies to of white glue or traditional model your satisfaction. airplane cement. Do not use epoxy. If your model continually falls off To remove, saw through near the on a wing or tries to spin in, try middle of the member using a hack­ adding some more area to the verti­ saw blade (without a handle), or cal tail. This was necessary to obtain razor saw, and then twist each reasonable flights from the model in portion separately. They will come the photos. · out with an ease that is disturbing. Pacer With the temporary bracing in Technology & position, do the upper structure. Pazmany...... ΊΓ/R Resources Continued from page 91 The best approach is to make the cockpit frames (stations six and 1550 Dell Ave.. Campbell. CA 95008 / |408) 379-9701 to be faired by eye, from 1/16 sheet, eight) first and mount them. Run between stations five and nine. No until the fit seems reasonable. longitudinal members between the To assemble, sand the center precision is required here, just make section members (4 spars, l.e., and cockpit frames and each end of the sure that the braces are snug against fuselage (stations one and fifteen). t.e.) until the parts butt to the each vertical support and well Then put in the horizontal cross cemented. The fuselage should now outboard panels with the proper braces between the longitudinal dihedral (3-3/8 in.) set under the last possess considerable torsional stiff­ members. Next, put in the slanting ness. Drop the shelves in. full rib. Washin or washout is not side members. used. Dihedral doublers are not The noseblock consists of a large Take out the temporary members fixed piece, into which is set a used ... simply butt and glue. The and put in the diagonal floor braces butt procedure is practical only if removable portion, permitting between stations five and nine. Be the wing is secured to the fuselage passage of tne winding protector with the rubber band and rubber very gentle at this point; the fuse­ tube. Finally, the propeller assembly, lage doesn't have much stiffness yet, cushion technique. If you plan to also removable, is set into the re­ and an oversized member jammed glue the wing to the fuselage (which movable portion of the noseblock. into position may well twist the will probably get you more scale I suggest that you make all the entire assembly. fidelity points), I would recommend associated pieces at this point, be­ a lot of dihedral spar doublers, for You are now ready for the upper fore assembling the noseblock the dihedral break will then become and lower inner braces on each side. structure to the fuselage; otherwise NOVEMBER 1978 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 117 FO KKER FK-3 1/6 Stand-Off Scale now in full kit form and completely redesigned for KIT INCLUDES: one thing: Thermals • Poly Glass fuselage. • Canopy. a • Machine-cut wing and stab 9 rib. • All balsa and spruce. • All necessary hardware. • Easy to follow full size plans Wing Span ...... 128" and instructions. Wing Area ...... 750 sq. in. Wing Loading . .... 8-10 oz. $ 8 9 . 5 0 Length ...... 48.5" Weight ...... 42-48 oz. Aspect Ratio ...... 21.85

Rt. 3, Box 457, Coeur D'Alene, Idaho 83814 W INDSPIEL MODELS (208) 664-6894

entry of a hand-held broken jigsaw towards the last (aft) former. When it CUSTOM TUNED ENGINES blade. As the cut develops, you can touches, saw off the excess length switch to a razor saw or a hand-held and bond. You will have to maintain AND COMPETITION hacksaw blade. To make up for the pressure until the glue "takes”; use ACCESSORIES thickness of the cut, bona in 1/32 five-minute epoxy. Sheet in the gap Specialists in standard sheet liners to the removable part. If between the fuselage and the first the cut seems crooked, trim the former; ditto the last former. or throttled Cox .049/.0S1 good side and build up the low side We’re now ready to bend wire. and Rossi .15 engines, with a commercial mixture of balsa The cockpit windshield wire sug­ parts Λ quality racing products. dust and epoxy, such as Epoxolite. gestions are on the plan. Most For detailad information, The removable portion is now any light spring wire will do. Balsa or send 13c stamp to: reattached with some system of soft aluminum tubing will not work dress snaps or screws. Remember, . . . I’ve tried these. In a turnover Kustom Kraftsmanship the finished connection must take landing, the windshield wire gets P.O. Box 2699 thrust and torque while being readily much of the load; a lot of give is removable. My solution consists of required here. Laguna Hills, CA 92653 one size 3/0 dress snap at the top Laminate the tail wheel as given (714) 830-5162 center and one screw (plastic, 4-40) on the plan, insert an aluminum at the bottom center. While it does tube hub, feed some 1/32 music the job, this particular combination wire through, and bend as shown. there may be real problems of fit is too finicky for real contest condi­ Epoxy to the frame after covering. later on. tions (rain, wind, nervous hands, FABRICATING THE RUDDER The winding protector tube is etc.). In particular, seating the tiny AND TAIL made of epoxy-bonded plywood. screw is unrealistic. Give it some Make the rudder center post over While it requires more work and thought and you’ll come up with station fifteen on the plan. Mount expense than the usual golf tube, it something better. the “ladder” to the aft end of the offers more room for the rubber and Make up a nose ring out of 1/16 fuselage. Carve the rudder top of can be made straight, whereas the soft balsa and balance on the ladder. usual golf tube is banana shaped. inch epoxy-glass PC board material, as shown on the plan. This ring will Glue in the rudder leading edge. Put The only tricky part is coating the serve to key the propeller assembly. in the trailing edge, along with the inside of the plywood tube with a Do not glue the nose ring to the sheet top and bottom supports. protective surface. Stuff a rag into cowl yet. Glue in straight horizontal pieces of one end of the tube, pour in about Cut side and downthrust angles 1/16 square from each ladder rung half a cup of shellac, varnish, glossy into the matching removable nose- to the leading edge (These are paint, or whatever you have arouno, block piece. When all the pieces go shown only in the rudder section and then plug the other end with a together, bond the main noseblock view). Next comes the inclined 1/16 rag. Turn the tube as though it was a portion to the fuselage. square members near the leading baton, until the entire inner surface Cut the cowling formers and eage. Now bend in the 1/32 ribs is coated, then pour out the excess. mount them. Do not notch the from the l.e., over the inclined Repeat until the interior is glass formers for stringers. While the plan members, then over the ladder to smooth. The outside doesn’t matter. supplies the number of stringers the t.e. Last comes an extension of Carve the main noseblock out of used on my model, the actual the main fuselage stringer to the rudder t.e. relatively soft balsa and hollow it out number is not critical. Simply put in to about 1/8 inch thick everywhere. enough to convey the impression of The tail is built over the plan. The Now saw out the removable portion, a rounded surface. Butt-glue over- construction is pure Earl Stahl. First using a combination of knife scores long stringers, one at a time, to the the 3/32 ribs, l.e., and t.e. are put to mark the outline, followed by the noseblock and over the first former. down. Then the top spar goes on. drilling of a small hole to permit the Let dry. Then bend the stringer Bits of 1/32 sheet are now spot- 118 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER glued to the base ribs and then streamlined by sanding in place. The entire tail structure is removed from MRP 1/12 SCALE 6 CELL R/C the board, turned over, and the Ě t e r a b e e CAR LESS RADIO lower spar glued on. Again, bits of 1/32 sheet are added on to the base RADIO CONTROLLED MODELS Sam e as»9 to except does not include ra ribs and trimmed. To mount the tail 1/12 Scale Race Cars both gas and dio control system Comes complete wth electric. Winners of 90% of the tro­ electric motor 6 NiCad cells, resistor- within the rudder, add the piece of wiper arm lype motor speed control and hardwood dowel between the phies at the 1974, 1975, 1976 & 1977 Nationals. battery charger Accepts most 2 channel center ribs. Before gluing, slide a radio control systems including JoMac 1/32 plywood retainer on to each brick and modular radios Recommend side of the dowel. The retainer MRP 1/12 SCALE ELECTRIC use of over 100MW transmitter Includes shape is given on the rudder plan. CLASS D R/C RACE CAR— mounting and operating instructions 6 C E L L O U TD O O R Inlay the retainer into the rudder 6 CELL ELECTRIC R/C CAR LESS top block. This car was the winner ot the 1977 RADIO CONTROL SYSTEM PROPELLER R O A R N A T IO N A LS 1 with JoM ac Speed =929 ...... S115.00 The propeller is a standard single- Control Radio. bladea folding affair. It's acceptable Com pletely assem bled and ready to run. MRP R/C 2 CHANNEL AIR BOAT < for AMA scale, but you do, in this 6 cell nicad electric R/C car utilizes principle, require a freewheeler for the proven MRP chassis and the all new This R/C Air Boat comes ready to run with #406 JOMAC MACH 3 Electronic Speed FAC scale. This is a gray area . .. Cox’ 049 engine and JOMAC Mach 3 2 you’ll have to check the local rules. Control Radio Control System channel radio High strength molded If there is any choice permitted, go plastic hull and deck designed to per­ form well in smoolh water as well as in with the folding prop. The issue is small choo Jum p s waves turns tight, can not flight time, but one of simple be run up on beaches survival. The only tall green things sticking out of the ground in my neighborhood are beer cans ana mossy rocks. The life span of a free­ wheeling prop is usually about three flights. If you must make one, try one 14 inches long by 1-1/4 inches thick by 2 inches wide, carved in the FEATURES INCLUDE: traditional style. I can’t vouch for its 1. High power 1000 MW transmitter performance; the one I carved 2. Proportional 20 amp electronic motor speed control with adjustable brake & didn’t even survive the test flights. torque FEATURES INCLUDE: Now, that folder is something else; 3. Two cells disconnect to allow 4 cell in­ 1. Tough sink proof hull after three years of abuse, it's still door racing 2. JoMac Mach 3 «404 radio for com going strong. 4. Quick charger included connects to plete steering and throttle control FABRICATING THE LANDING any 12V battery tor charging 6 cells 3. Spring starter GEAR AND WHEELS 5. Rugged aluminum chassis 4. Large fuel tank for extended running Pazmany’s spring-type landing 6. Front end assembly designed to take 5. Fully enclosed radio compartment the abuse ot competition and is adjusta­ 6. Jensen Sea Sled hull design lor maxi gear is probably best modeled in ble with independent Iron! spring su s­ mum stability and low drag at 15-25 MPH fiberglass. However, the forms are pension 7. Racing stripes applied tricky, and I settled for a bent 7. Painted and trimmed Cobra II Lexan" 8. Cable linkage rectangular spring arrangement. body-light, strong, sharp looking and 9. Full throttle control The plans give all the bends in three- good handling 8. Brass bushed chrome front wheels R/C AIR BOAT COMPLETE READY views. If you can't find rectangular 9. Dipped fast charge G.E batteries TO RUN W«404 Radio 990 . $200.00 spring steel, use 3/32 music wire. Gooa old 1/16 music wire just isn't BASIC SPECIFICATIONS: #991 R/C AIR BOAT READY TO stiff enough. The torsion bars help RUN LESS RADIO absorb energy and also stabilize the Speed 29 MPH. 48.5 KPH Gear 16/52 Same as #990 above except does not in­ main gear. Soft solder these to the Weight: 38.5 oz, 1064 gram. clude radio control unit and linkage De­ main gear, after wrapping the con­ Motor: 05 Dyno tested signed to tit JoMac Mach 3 brick radio nection with copper or brass wire. Range· 900 feet Most other 2 channel radios will install The model wheels were made of Speed Control Output: 10-20 AMP easily an unusually tough plastic foam adjustable Rear Tires: 2'» x Γ wide R/C AIR BOAT LESS RADIO “ rubber” specified in the plans. «991 ...... $ 50.00 JoMac Brick receiver has a high speed »992 R/C AIR BOAT LESS RADIO & Ordinary foam or sponge materials front (steering) servo and built in elec­ ENGINE won’t do ... too sort or heavy ... or tronic motor speed control This speed both. If you can’t find the cross- control works on 4 or 6 cell cars, operates «992 ...... $ 30.00 linked foam plastic, try the usual smoother, is more reliable, and has faster response time than rheostat type controls carved soft balsaalsa wheels. To glue the Five gas and three electric to choose Receiver ulilizes motor batteries so weight ply hubs to the foam wheels, use from with or without radio Send 50‘ for and cost are reduced. 6 rnonfh warranty complete catalog to rubber cement or contact cement. on radio 30 days on motor, batteries, and To attach the landing gear to the car. wings, chop slots through the 6 CELL ELECTRIC R/C CAR ĚioMtn bottoms of tne middle five ribs and COMPLETE READY TO RUN WITH 12702 NE 124th Street 3406 ELECTRONIC SPEED CONTROL Kirkland. Washington 98033 false ribs. The torsion bars should fit ^ R A D IO = 9 1 0 ...... S 2 6 T 0 0 y ^ alongside the thick landing gear (206) 827-8606 ribs. Only the aft end of the torsion bars is glued to the thick ribs, the main landing gear is not. The main NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 119 ★ ******★ ******★ ★ **★ ***★ ★ ★ *★ ***★ *★ ★ ★ get the CG located properly . . . * mine required eleven grams of * ballast. Any attempt to fly with the + CG significantly rearwards of the * fA>’ PROPELLORS rear spar will result in a spirally *■ unstable model. m 2 3 0 IÍ 5 »eORVAND* Ärt TORRANCE CA tOW PHONE 713 539 2313 FLIGHT + OUR PROPELLORS ARE DESIGNED ANO Set the tail to a horizontal attitude * ENGINEERED FOR MAXIMUM THRUST and glue lightly at the dowel to * AND EFFICIENCY. retain the setting. Fold the propeller * after putting enough turns on the * rubber to prevent any slack. * NO REWORK NEEDED. TAKE THEM OUT OF THE PACKAGE AND PUT THEM RIGHT Get on your knees over the softest * terrain you can find, and thrust the * ON THE AIRPLANE machine into the breeze with the * \ v * nose slightly down. Despite its size, * OFFICIAL NATS the machine flies slowly . . . do not throw extra hard. The oest place to * RESULTS + ;rasp the fuselage is at the two * of the top 40 owest longerons, just behind the * fwing. Correct the glide for stalling * finalists 55% used or diving by changing the tail inci­ + Zinger props dence angle. When satisfied, stand * 22ν·ίΥο was our nearest up and test again. If there is any * pronounced turn, glue on a trans­ * competitor parent rudder tab and deflect to + 22VM combined other offset the turn. Keep changing the * tail attitude until you are getting the + * brands optimum glide. + Hand wind about seventy-five * AVAILABLE IN THE FOLLOWING SIZES: turns and release with your left hand * OIA. PITCH DIA PITCH at the prop tip and your right hand * t 11" 5 -6 -7 .7 5 -8 8 .5 " 4-5-Ó -7 T. in the usual spot on tnose two lowest + 11" 6 W -7 W 8" 4-5 -Ó -7 longerons. Watch for steep climbing * 10" 4 5 -6 -7 7 .5 " 4-5-Ó -7 * or any strong circling tendency. A 9 " 4-5-Ó -7 7 " 4-5-Ó -7 too-steep climb means that more ★ ♦★♦★♦♦★★★★★★★★★★★★★★★★★★■ a·*** downthrust is required; pro­ nounced circling means that either landing gear must be free to move procedure. 1 use the thinned white the side thrust must be changed or within a clearance slot cut into the glue routine, not out of conviction, that you have some horrible warp. thick ribs. After inserting the land­ but simply because there is less Watch the transition to glide . .. ing gear, close the slots within the smell. Tne cowling and wing tips does the prop fold correctly? Slowly middle three ribs by gluing doublers require many individual pieces of work your way up to about one on both sides of eacn rib. Now add tissue; the rest of the machine is hundred and fifty turns. You should the false fuselage portion between straightforward. Water shrink the now see some climb, about twenty the landing gear. tissue, then brush on two coats of feet. Switch from hand winding to COVERING AND DECORATING dope mixed 50/50 with thinner. the full protector regalia at this Everything above the main longi­ Cut trial-and-error windshield point. At high turns, bond the rear tudinal stringer receives white patterns out of ordinary paper. peg to the fuselage with epoxy; Japanese tissue; everything below, When you have one that fits, trans­ should it vibrate loose, things will red. The wing is all red, with no fer the outline to acetate sheet or become awkward. decoration of any kind except the celluloid of about two to five- For maximum performance, aileron outline. Tne tail is all white, thousandths thickness. Cut and switch to the contest motor. Check with no decoration except the trim glue. Bond a strip of 1/4 inch wide the CG position again to make sure tab outline. The rudder outline rubber motor in the wing well as a that all is well. Do a few glides and coincides with the "ladder”. The cushion. then slowly increase the turns on the entire vertical tail surface is white. A FINAL ASSEMBLY contest motor until you reach about black tapered band is cut from tissue Mount the nose ring so that the 85% of handbook value (roughly 600 and applied to the fuselage sides propeller balance weight is roughly turns). At this power level, you can after tne basic red and white cov­ downward and the folded blade is profitably change your launching ering is complete. Check the plan over the left cowl. Make the rear technique. A release at about fifteen for band dimensions. The large peg as shown, and also a straight 1/8 degrees above horizontal is best. identification letters and numbers inch diameter piece of music wire Should you have any questions, are traced from the plan and cut about a foot long, to be inserted into send a stamped, self-addressed from black tissue. the rear peg as a means of holding envelope to me, care of Model The smaller letters (EXPERI­ while winding. Make a winding rod Builder. MENTAL and PAZMANY PL-4A) are to fit your winder and the bobbin Now, let's go back to the begin­ too difficult to make in the above hook. ning. Why build it? If you have the manner. I used transfer letters (Letra- Make up the test motor as per necessary experience, i.e., you can set 28-point Helvetica Medium) plan and insert it into the fuselage. build a peanut or walnut or coupe rubbed on to a small piece of white Check the CG location. It must be at and get an honest thirty seconds, tissue, which was then glued into or forward of the rear spar. If nec­ and derive delight from flight real­ position. essary, glue steel washers or other ism, you will enjoy this one. · Use any conventional covering weignts to the inside front cowl to 120 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER Silent Continued from page 63 MAKE SURE THAT YOUR POWER POD ENGINE IS RUNNING IN THE PROPER DIRECTION This may sound a little ridiculous to some, but if you are like me, and power pods are your first introduc­ tion to .049 engines, be alert to the fact that the reed valve types fre­ quently start backwards. Our regu­ lar propellers are designed to pro­ vide forward thrust when rotating in a clockwise direction, so when they rotate counterclockwise, you get reverse thrust. Reverse thrust may be great for braking real planes, but it sure doesn’t do anything for launching model sailplanes. My Black Widow worked perfect­ ly for the first month. I became adept at using the recoil spring starter for one-flip starts and quickly tossing the sailplane into the air to get maximum altitude from my Qive a QreatGVise! engine run. It came as quite a sur­ PanaVise ... a great gift idea. Everyone loves a PanaVise. prise when I once tossed the model It tilts, turns and rotates every which way to quickly and securely and it floundered to the ground, position work exactly where wanted. hitting on the nose and putting a big Sturdy all metal construction. Model 301 original PanaVise shown. dent in the nose block. Since the Model 381 has vacuum base. Available at your dealers, boxed engine was still running, I gave it ready to go. along with a variety of other PanaVise interchangeable another toss, only to be treated to the same spectacle. The snickering bases, holders and accessories. of some onlookers convinced me Write for FREE brochure and dealer list. that I had a problem, and I had CH5. 2850 29th Street. Long Beach CA 90806 better find out what it was. My pre­ launch procedure now includes passing my hand behind the run­ on my receiver, it responded to back to mid-wing. I theorized the ning engine to make sure the prop­ Tom's transmitter. We later dis­ cause of the crash to be a loose servo wash is in the proper direction. covered that the manufacturer was case top, which may have resulted in HOLLER WHEN YOU'RE HIT out of 72.240 crystals, and had tem­ the rudder servo gears binding. While flying at about 400 feet porarily installed 72.400 crystals in I remembered Chuck Cunning­ altitude in a thermal search pattern, order not to delay Tom's order. It ham's advice about crashed models. your model suddenly begins a was very fortunate that the interfer­ He suggested that you pick up all the series of unassisted dives, zooms, ence hit my sailplane at a sufficient pieces, take them home, and store turns, and wallows. Attempts to altitude for me to attract attention them in the corner of your garage. bring her under control only result and locate the probable source. The Don’t make any hasty judgments in more crazy behavior, and you story would have been different about throwing away the remains. realize that you're being hit by radio with a powered model. The rebuilding job may not seem as interference. formidable when viewed a few days SAVE THE PIECES later with a cooler head. This happened to me the day that No words can describe the help­ Tom Vincent brought out his new less feeling that comes with the loss CHOOSING YOUR SECOND custom-built R/C system. It was one of control of your airborne model. I SAILPLANE MODEL of the new generation systems, with had just made a power launch. At Since joining the R/C ranks, I have such features as servo reversing, about 50 feet altitude, I applied developed into a compulsive build­ mixer controls, slow roll button, and some right rudder to compensate er. I am not a fast builder (average 2 so on. Tom and I are old flying for a leftward drift. The model to 3 months to a model), but I like to buddies. Frequency 72.240 is his responded by locking into a tight always have a model under con­ favorite. I was flying on 72.400. I right spiral. No amount of frantic struction, so that I can spend a few hollered (expletive deleted) that I rudder and elevator stick movement building hours whenever the mood was getting interference on 72.400. would break it loose from this pat­ strikes me. Someone relayed the interference tern. It immediately started to lose It was more than ayearand several message to Tom, who had just altitude and drift downwind. The hundred flights before my Wind­ started his engine to check throttle normal power cycle of two and a ward met with the calamity I have settings. He shut off, and my sail­ half minutes seemed an eternity as described. After my first six months plane returned to its sedate ways as I the model came closer and closer to of soaring, with a best-flight time of nastily brought it down fora landing. ground zero. Unfortunately, the 40 minutes , I was ready to build a Tom was perplexed by his ap­ altitude ran out before the gas, and second sailplane model. I decided parent interference, because he had it cartwheeled as the right wing tip that this model should be a standard ordered his new system on 72.240 struck the ground. Damages con­ class ship (100 inch or less wingspan) and the transmitter frequency label sisted of the wing broken in three so that I might compare its per­ indicated 72.240. But when I turned places and the fuselage demolished formance to my Windward. Better NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 121 edge. The latter item stiffens the DID YOU KNOW THAT ___ stabilizer, and will probably save me Tatone Products now manufactures more special accessories for flying model future repairs the first time that I airplanes than any one else in the world? hook the 27-inch span stabilizer Tatone Products has the greatest selection of dock work timers, engine mounts, while going through a 30-inch wide steerable nose gear kits, speed pans and assorted items to be found anywhere? door frame. I paid the price for my TATONE rhymes with SPOM ONP modifications, because the finished Shown below a re j u s t a sam pling o f th e many a c c e s s o rie s th a t we make. model required three ounces of lead nose weight for proper balance. I’m hooked on plastic film fin­ , í i ? í ishes. Their convenience and lighter weight make them hard to beat. My first such film was Monokote, and I have been using it ever since. I believe the Monokote ads when they say that it provides extra strength for covering open wing and

CCKK'W U C TI«ftS SPINNERS frame structures. The light con­ — struction and large wing areas of a CLOCK WORK TIMERS ALL SIZE ENGINE MOUNTS PEACE PIPE MUFFLERS SYRINGE FUELERS sailplane make this extra strength SURGICAL TUB INC SPECIAL ENGINE MOUNTS CALUMET MUFFLERS PEN BLADDERS NEOPRENE TUBING TANK MOUNTS MUFF-L-IT MUFFLERS FUEL TANK FILLER very desirable. The Windrifter was SCALE INSTRUMENT M T S SPEED PANS ENCINE MANIF0L0S STICK-A-TUBE ANA SAFETY PROP NUTS R/C STEERABLE NOSE GEAR MUFFLER EXTENSIONS ENGINE COWLS finished in the same black and ENGINE TEST STAND R/C WING HOLD DOWNS RACE CAR MUFFLERS FUEL SHUT OFF VALVE GLOW PLUG STARTER NYLON SCREWS CHICKEN STICKS PROPELLERS transparent yellow color combina­ BATTERY CHARGER NYLON SPINNERS RAZOR BLAOES ENGINE NT. DRILL JIG ------______y tion as the Windward. The Windward was equipped with HOW DO YOU GET TATONE PRODUCTS? an EK positionable tow hook, but a That's a good question. It is really very simple. Just visit your local shop. power pod has been my primary A L L items listed ARE AVAILABLE to every hobby dealer and hobby distributor source of altitude. I decided that, world wide, so go take a look. because of the added weight of a Some hobby shops in non flying areas may not stock our line. Or perhaps there bigger model and the well-broken- is no hobby shop convenient to you. If such is the case, then DON'T WAIT - in state of my Black Widow power ORDER DIRECT from us. pod, I would need a more powerful SENO SI.00 for 25 page illustrated cataloa, refundable with first order pod for the Windrifter. I had a spare Cox Tee Dee .049, and felt this would provide the necessary power TATONE PRODUCTS CORP. SAi” “ ,2 assist to get the Windrifter up to cruising altitude. Construction of this new pod is similar to the first visibility was another reason for been a tail man. one, except that it has a cutout for a The Windrifter is an excellent kit, selecting a bigger model. I have separate one-ounce gas tank, and already mentioned some of my consisting of quality wood, full- sized plans and building instruc­ uses a Kraft-Hayes engine mount to visibility problems, and besides, secure the Tee Dee. these 44-year-old eyeballs were not tions, and most of the required that good to start with. hardware. Tom Williams, the de­ Several years ago, I bought a four- signer, states that it was not de­ channel Futaba R/C system, with the There are at least half a dozen idea of using it for sailplanes and good standard class kits with list signed as a first sailplane for the beginner, but it is being recom­ smaller two and three-channel prices in the 40 to 60-dollar range. models. I made sure that I got four Some models that I considered were mended as a trainer by many dealers because it is easy to build, and the servos. These servos now are handy the Airtronics Aquila and Olympic for equipping my two sailplanes. II, AFI Super Monterey, Craft-Air same inherent stability which makes it a winner also makes it easy to fly. You can permanently install two Windrifter, and Mark’s Models servos in each sailplane. It then takes Windfree. The Aquila has received He emphasizes the importance of following the plans and building only a few minutes to transfer the lots of publicity as the winning battery pack, receiver, and switch model in the 1977 World Soaring light, and also indicates that spoilers have been tried and later discarded harness from one sailplane to the Championships, but it carries the other. This can be done when pack­ highest price tag of the lot. Italsohas by many Windrifter owners. ing your models for the trip to the a rounded fuselage, and probably My apologies, Tom, for not fol­ flying field, or you can take both of should be built with spoilers and lowing your admonition to build the them to the field and make the anti-vortex wing tips. I considered model as designed. The biggest change there, if flying conditions these features to be unnecessary change that I made was to use 1/32 favor the use of one sailplane over plywood doublers to reinforce the complications at this stage of my the other. sailplane activities. fuselage from the trailing edge I am sure that all these models forward, rather than fiberglassing The Windrifter lived up to my would have satisfied my need for a this area as called for in the plans. expectations by being a fine-per­ good standard class model for ad­ This change facilitates the use of forming model. Hand gliding tests vanced sailplane training. I finally plastic film covering, because films to check the model’s tracking were settled on the Craft-Air Windrifter just do not work very well over successful, requiring only minor because I liked the polyhedral wing; fiberglass. Some other changes were trim adjustments. I prevailed upon because it has a respectable record the liberal use of triangular stock for Tom Vincent to handle the transmit­ in competitions; and lastly, because fuselage and former reinforcement, ter for the first test flight. With a I was intrigued by the new high-tail diagonal bracing in the tail surfaces, brand new engine, I was concerned version. I think the tail is really sexy, ana a piece of 3/16 square spruce that the model’s flight responses and the truth is that I always have facing on the stabilizer leading might be sluggish, because of the

122 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER THE SECOND ANNUAL CONSUMER TRADE SHOW JANUARY 6 & 7, 1979 Pasadena Center, Pasadena, California HOME OF THE FAMOUS ROSE PARADE & ROSE BOWL SEE THE LATEST PRODUCTS AND VISIT WITH MAJOR MANUFACTURERS AND DISTRIBUTORS OF: MODEL AIRCRAFT MODEL ENGINES MODEL BOATS RADIO CONTROL SYSTEM S MODEL CARS MODELING ACCESSORIES INDOOR AND OUTDOOR DEMONSTRATIONS STATIC DISPLAY COMPETITION IN MANY CATEGORIES SEE HISTORY'S FIRST INDOOR R/C RECORD TRIALS OVERSEAS EXHIBITORS CORDIALLY INVITED INTERNATIONAL MODELER SHOW. BOX 127. COSTA MESA. CA 92027: |7I4| 548-4700 rich engine setting. After first mak­ in the ON position, take a reading should be, a spark length of a 1/4 inch ing sure that theengine was running with your voltmeter across the should be seen. If not, you probably in the proper direction, I did the stationary and movable points. If have a weak ignition coil or faulty hand launching. A half-full tank was everything is as it should be, you condenser. If so, replace these items good for about 300 feet of altitude, should get a reading of 2.4 to 3.0 volts, and repeat the test. and the Windrifter rewarded us with depending on the batteries you are A common mistake among mod­ a 15-minute first flight. Several more using. If you don’t get this reading, elers is to use electrical equipment such flights gave me hope that the recheck your wiring and the con­ manufactured forty years ago and Windrifter will provide the hour- dition of your batteries. To take a expect ittoperformonanequalbasis long flight that I am still striving for. check on the condition of the bat­ with modern equipment. Ignition THE THRILL OF IT ALL teries, close the ignition points, and coils manufactured in the 1938 era My biggest thrill while flying sail­ with the switch ON, take a reading are prone to have lost their wax planes was the time that I picked up across the output leads of the bat­ sealant, and are therefore subject to a thermal while on the base leg of a tery. A reading of at least 1.7 volts internal wire breakage. It makes final approach. I worked the model should register on the meter. If not, sense to rely on modern, high- up for another 12 minutes of flying the batteries are probably weak and quality equipment. time. I got a real sense of elation, should be replaced or recharged. The next thing on your checklist because, after accepting defeat, I Assumingthatall of theabovetests should be the spark plug. If you get a had temporarily triumphed in the have proved satisfactory, the last step good spark between the high constant battle of model and pilot would be to check the condition of tension lead and the surface, con­ against gravity. It’s time like this that the spark. Remove the high tension nect the spark plug to the lead and make it all worthwhile. · lead from the spark plug and hold it repeat the test, holding the spark about 1/16 of an inch from any plug body against the top of the surface of the engine. Using a small cylinder head. Again, make contact Fuel Lines.... Continued from page 55 screwdriver, and with the ignition across the ignition points with your connections. DON’T OVERLOOK points open, make a momentary small screwdriver. A healthy spark ANYTHING! TAKE NOTHING FOR contact between the movable point should be observed between the GRANTED! The high tension lead and some part of the engine. A spark spark plug electrodes. Now. repeat from thecoil tothespark plugshould should jump from the end of the nigh tnis test by flipping the prop instead be isolated from all other wires and tension lead to the surface of the of using the screwdriver. The results metal objects. engine. Oh yes; don’t hold the high should be the same. If there is no After assuring yourself that all tension lead too near the exposed spark, or if it is intermittent, a close electrical connections aresound and end, as you may get zapped when inspection of the ignition points is secure, you may wish to make a final ou make this test! Continue the test, required. Contact points should be check, using a voltmeter. With the olding the high tension lead further clean and have a gap of .008 to .012 ignition points open and the switch away each time. If everything is as it inches. An excellent cleaner for NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 123 system, along came rumors of the boys back east running an engine on “Liquid Dynamite”. Yeah, no coil, The new 4th edition condensor, or batteries; nitrome- thane had hit the scene before the glow plug. your Guide to the Ana then the first Arden glow plugs! Gawd, what an innovation! Today, Only $5.25 we wish we had kept our Aero Spark R/C world ignition packs, as with all our years of collecting, we’ve been unable to locate even one. I suppose they got thrown in the trash, because it was such a "breather” to use those first 2,000+ R/C Items glow plugs. Methanol wasn’t easy to Pictured, Des­ et in those days, nor was good cribed, and Priced egummed castor oil. Our first fuel was just three parts methanol, one part castor, and about 5% ether thrown in to keep it running. Some engines, such as the Featuring R/C Orwick .64, had very high com­ Systems, Aircraft, pression, too high for glow opera­ Boats, Cars, tion. Others were too low on com- Engines, Tools, ression, and would quit when the & Accessories. attery was removed. White gasoline •'d 70 wt. oil would work fine if riitro propane was added. Very few knew about nitromethane, and those who did, kept quiet, as they More than 200 had a real advantage. Manufacturers Included In those days, nitromethane sold for about $.15 or $.20 per pound. This meant only $100 or so for 55 gallons. Today, modelers are faced with tremendous rises in fuel costs. To give you an insight, consider Indexed and how tne nitro paraffins are made. Inform ation about more than 2200 model aircraft, cars, Cross-Indexed for Basically, propane is elevated to boats, engines, radio systems & accessories. Easy Use. 450°F., and under pressure, sprayed with a mist of nitric acid. The result is Please send m e . .copies of the new fourth edition of the nitro propane No. 1 and No. 2, Radio Control Buyers Guide. Enclosed is $6.00 for each copy nitroethane, and nitromethane. A T B E T T E R ordered ($5.25 for each Guide plus $.75 for postage & handling). Nitromethane delivers the greatest HO BBY amount of power per unit, followed SHOPS OR Total Enclosed. .. (U.S. and Canada only) by nitroethane, and so on. Through O R D E R distillation processes, these nitros Name: are separated to various degrees of DIRECT! purity. The nitromethane we use Street Address:. today in the model fuel industry is around 95% pure, with the 5% con­ C ity , State, Z IP :______taining a mixture of nitro propanes m i *• Return to: Boynton & Assoc., Clifton House, Clifton, VA 22024 and nitroethane. Absolute, or 100% pure nitromethane would really be contact points is obtainable at most this month sit atop this modeler’s out of sight, pricewise. electronic stores in spray cans and is fondest recollections. Let's go back to that 20 cents per labeled “contact cleaner”, and will As a wet-behind-the-ears kid so pound price for nitro in the 1940’s. be a compliment to your tool box. full of questions that none of the old Even in the 1950’s, it was below 30 Continued next month. · fliers could stand him for long, cents per pound. Unfortunately, ALDRICH everything that happened in the there is now but one source for 1940's absolutely held me spell­ nitromethane. Originally, it was • Goodgoshamightydidjasee- bound. How well we remember a produced by Commercial Solvents thatenginestartwithonlyabad- 1946 contest in Laredo, Texas, where Corp., then about 5 years ago this dryconnectedtothesparkplug? we saw Russell Snyder loop a "goat” company was sold or absorbed. Our Or, I'l I bedamneddi djaseet hat- Scientific Mercury with a rear-valve only source for the nitro paraffins sun nybeachdoaloop’nfly upside- Contestor D-60. And a year or so today is the IMC Chemical Group, down? There are many impressions later, the Corpus Christi boys flying Inc. Along with this change in com­ indelibly etched in our modeling bipes inverted. Everything was a pany names came absolutely unreal memory . . . like our first successful mystery in those days. .Everything price increases. In the past year, gas-powered flight ... an Atom- new was a distinct challenge. nitromethane has gone up $145 per powered Zipper A, O.O.S.. but the Just about the time we got really drum ... an increase of more than a word jammers that start our missive proficient at wiring an ignition whole drum cost in 1952! Some 124 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER .··****»,, v .·· / Model .· ♦* R C Modeler : Airplane News \ * Flying Models Model Bulder « magazine : magazine's : : magazine's i’s CALLS \ Dave Unstnim * \ Frank Tram » (ays- * · says about » Rfc a HOT STUFF” “HOT STUFF” “HOT STUFF” “HOT STUFF’ “A REVOLUTION IN "THIS IS THE NUMERO UNO “A BETTER CYANOACRYLATE “ THE ENTIRE MOOEUNO CYANOACRYLATE ADHESIVE JUST ISN’T AVAILABLE" WORLD HAS SONE NUTS CONSTRUCTION TECHNIQUE' AROUND THE WORLD" OVER THIS 6LUE”

u ie iliie Č ity PO BOX 1935. ARLETA. CA 91331 PHONE (213)899-2301 manufacturers may have a reserve a six-pound weight fast enough, supply of nitromethane on hand, even with the help of the winch. but when it is gone, they are at the When the chips were in, Jon Lowe mercy of a one-source supplier, and walked off with first place overall. you, the modeler, must bear the Throughout the contest, there was a burden. If increases keep on at the strong feeling of good fellowship present rate, $20 or more per gallon and mutual respect ... a precious for a 10% or 15% nitro content fuel commodity in today’s world. will not be far away. You may recall my mention of Al 6 RUBBER SCALE PLANS In view of the above, a no-nitro Nagele’s LNG 3100. On my request, COMPLETE PLANS SHOW ALL PARTS. fuel doesn’t look so bad. Our BOTH WINGS. FULL STAB. PROP BLANK. he provided further information: SCALE SOURCE REFERENCES European brothers were forced to “The original concept for this plane this solution years ago. Because of 20'FotKerta SK 2, 20 Crosby CR 4. was derived from a design shown in 13’ Chambermaid. 13' Folk art· SK-2, so-called FAI fuel and very negative the August 1977 issue of M odel 13'Floyd Bean. 15’ Smirnoff Bearcat action by the AMA contest boards in Airplane News (John Hoover’s “Vill Set $δοο Postpaid Foreign add $180 1968, the Europeans have led the Doo”). This design reflects some order from CLOUDBUSTER VENTURE way in the development of the PO. Box 2921 earlier experimentation by A.M. Livonia. Michigan 481SO tuned pipe. We now have some DEALERS INQUIRIES INVITEO really fine engines being produced Pippish and John Hoover. Intrigued that utilize the tuned exhaust system, by the concept of the terraced wing, tively, as you move toward the not only as a power-boosting source, I decided to try a design of my own trailing edge. Each terrace is 1-7/8 but as an excellent muffler. to see if it really works. My wing is inches wide. In 1960, Bill Wisniewski won the flat-bottomed, and is similar to the “The fuselage was designed for World C/L Championships using a Clark Y in cross section. The chord is minimal frontal area, and uses an tuned pipe. Now, 18 years later, we 7-1/2 inches at the root, and each in-line servo arrangement with a wake up to the fact that he started wing panel is 59 inches long. The ter­ mechanical aluminum mixer to the “answer” to many of our prob­ races are similar to John's, but operate the V-tail. It was con­ lems today. Perhaps it is time we all slightly smaller so as to fit the nar­ structed of 3/16-inch balsa strips laid wake up to today’s needs today, and rower chord. Specifically, the steps lengthwise over bulkheads every six not wait 18 more years to discover are 0.1,0.08, and 0.06 inches, respec­ inches, much like barrel staves. that we a re in trouble. ·

Soaring...... Continued from page 47 NATIONAL SOARING SOCIETY MEMBERSHIP APPLICATION second day, and flying was great. A N S S N o . 12-volt electric winch was used to DUES ARE AS FOLLOW S: Individual: $10.00 Family: $15.00 carry the larger planes aloft. Joe (Any Senior or Open AM A member and Newland’s Kestrel weighed eight any of his immediate fam ily w ho are also pounds. He chose to move the radio AM A members.) rearward to make room for a full- Junior: $5.00 (Any Junior A M A member) depth cockpit; this required adding Each member or fam ily automatically two pounds of lead to the nose. He receives a subscription to the society pub­ traded appearance for added stress P h o n e : — — lication SAILP LA N E, starting with the d u e s a n during takeoff and landing. The two first issue published affter payment of A M A N o L S F N o . Kestrels flew well and thermaled dues and continuing thereafter through appropriately, but it takes a lot to the membership year. properly judge their distance, espe­ Dues are payable prior to December cially on final approach. Ray and I 31st of each year for the ensuing year. D u e s ------In the event a member joins during launched ROG (right off the M A I L T O : the dues year, he shall submit dues as D o n a t i o n follows: between Dec. 1 and June 30, ground) . . . it’s more scale-like, and J i m B a r r full annual fee; between July 1 and Nov. seems more secure when handling a B o x 2 0 0 9 T o t a l 30, one-half the annual fee Members large plane. Remember, on launch Denver, Colorado 80201 joining during December of a year shall you only gain stability after exceed­ N e w m e m b e r s h i p ( ) Renewal ( ) also be members of ensuing year. ing stall speed. It’s hard to accelerate NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 125 aircraft. Mack McDowell converted his * i. Wanderer into an aerial reconnais­ sance platform. He cut a hole in the fuselage and mounted his Minolta 16 stilfcamera, which is actuated by Μ an extreme throw of the elevator. You get only one shot per flight, but the results are interesting, and provide a multiple mission for the Wanderer. i i Me- J Al Doig solved the problem of \ s tearing up the wing at the poly­ /Μ hedral joints when you land on rough terrain. He simply bent 1/16- inch wire to encircle the wing wies / at the polyhedral joint and protrude under the wing in a neat arc. When d ř the wing panels are taped together, FLI 9HIRT9 the wires are held in place. It’s ME AND MY RC 7Ö NATS AMA WINGS simple and prevents unnecessary heartache. 4 CO LO R (While They Last) 4 CO LO R (EXCLUSIVE RIGHTS „ (PERMISSION FROM AMA) Dan Crum wondered how well FROM ROYAL CROWN COLA) Green color. the Mach I would fly as a slope Pattern, Pylon, Soaring, Chopper, Free soarer. He added six inches to each Flight, RC Widow, “The Heavenly Sport” (RC Cherub), wing panel and replaced the engine UKie, Speed, Rat Racer, Combat, Aerobatics. with a pound of lead. Here’s a new, fast, formidable flying object in the Your choice on white 50/50% polyester shirt with skies over Torrey Pines. It’s fully navy trim. „ _ aerobatic and beautiful in its per­ Adult S, M, L, XL 5 5 . 5 0 formance. Child S, M, L + 50ς postage Murph Misiewicz, of Encinitas, FLI CAP With 4 Color AMA Wings California, built the Windspiel Fok­ S, M, L (Each Size Adjustable $5.50 + 50< P o s ta g e ker FK3. This kit is not for the We do custom work for clubs,special events, businesses. beginner, but his effort and skill is Any size, any color print on shirts, jackets, caps. Information really well worth the result. This 1/6 sent on request. stand-off scale sailplane weighs in at 48 ounces. Wingspan is 128 inches. FLI dP 9 HIRT9 Wing area is 750 square inches, with 5132 DEL REY · LAS VECAS, NEVADA 89102 · (702) 878-1624 an aspect ratio of 21.85. The tail section reflects similar' high aspect These were then sanded to about of ihe glider. ratio. Murph chose to install Mag­ 1/8-inch thickness, the gaps filled, num 12 spoilers in the wing. These and then painted. The V-tail is I had to try this one myself. I first provide smooth descent for landing. similar to john’s, but the chord and used a Windfree, then later noted The fuselage is molded in high- span have been reduced, and the that his rig would easily handle the quality fiberglass. A primer coat was control cranks have been complete­ Olympic 650, Avatar I, or larger covered with classic white to set the ly enclosed in the fuselage. The sailplanes. After checking align­ stage for realistic decoration. In ready-to-fly weight is45 ounces, and ment, he taxied the “biplane” tothe flight, this ship responds well, and the initial flight of this craft was very takeoff point, gunned the engine, there’s no flutter, even in a terminal promising.” and after a smooth roll, lifted off into dive. Here’s a good thermal ship for I hope this description will in­ a spiral climb. I expected him to the advanced flier. spire some ol you designer-types to release thegliderat lowaltitude.but Roger Sanders, of Atwater, Cali­ try your own hand at a terraced­ Dick was intent upon providing me fornia, has designed two new birds winged craft. I guess the real test with a long, free ride, and so separa­ worthy of your attention. The first is would be to build two identical tion took place at about 500 feet. I derived from the Ridge Runner, and wings; one with terraces, one with­ spend little time around power is really a sleek slope soarer. The stab plane pilots, but this gave me a new out, and then fly the craft with one is of solid C-grain balsa, and there’s on each side, and note the amount excuse to visit their site. While in the no flutter at high speed. You can add of offset required to balance any air, I'm torn between wanting to weight at the CG by pouring mer­ tendency for the plane to roll, due ride that thermal and getting the cury (which is denser than lead) into to the difference in wing efficiency. frequency clip back into tneir hands. the small amount of room left un­ Any comments? There have been some other filled in the fuselage. Using the same There are many ways to launch a happenings on the San Diego scene. building technique, Roger has put sailplane: hi-start, winch, power Roger Taylor has come up with a together an amazing flying wing, poa, tow plane . . . and even piggy­ modified Aquila that really moves which he calls the Windfreak. Here back. Dick Eagle, of Chula Vista, out. He uses semi-symmetrical in­ again, the servos are in line, and the devised and constructed such a board panels, counting upon the construction fits like a glove. Here’s mobile launching pad. His “Flying increased Reynolds Number for wishing him well with his new Atlas” can be adjusted to hold reater efficiency. A number of our creation. sailplanes of various size. Rubber est pilots have now flown this bird For those who appreciate valu­ bands secure the wing until he and speak highly of it. Perhaps this able reading material, may I recom­ chooses the proper point for release concept is worth trying on other mend fane’s Pocketbook of Re-

126 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER NOW THAT WE HAVE YOUR ATTENTION Plane Jane Specifications PRESENTS Span—51 In Area—500 eq In, PLANE Weight—3-4 lbs. JANE Engine— 15·.25 d e c a l Radio—3-4 channels ,n c l u o e d Features JANE FOR THE ONLY $79.05 BEGINNING R/Cer Sport Trainer P. O. BOX 3792 IRVING, TEXAS 75061 motely Powered Vehicles: Robot Aircraft Today, by Jane Taylor and Presents three new Peanut Scale Kits in two great Ken Munson, McMillan Publishing M ICRdS series: Super Light Indoor and Outdoor styles Co., 1977. This book traces the Both series feature development of radio-controlled Color Coded Labels Printwood! aircraft, from the original work of Auditorium Green-indoor kits 18" Stripwood1 Professor A.M. Low, in WWI, to Sky Blue-outdoor Light Colored Tissue! today’s RPV’s. The book is a wealth kits PART PAK: includes of ideas bound to stimulate your SHOWN IN PIC Plastic and Hi-Per imagination. Piper J3 Cub! Balsa Prop! May I also call to your attention Stinson 125! the valuable R/C Soaring, San Diego Piper Vagabond! Area Handbook. It’s crammed full of Sherry! fundamental information for the beginner, and has good words of I advice for those more advanced. It EACH S4.25 , Micro-X Products deserves to be in your library. You P.O. Box 1063-A can obtain a copy fór $2 (covering At Your Dls/Dealer Now!! Lorain. Ohio 44055 the cost, postage, and handling) by ordering directly from the Torrey Pines Gulls Radio Control Soaring a Cox .020 that would ROW , though the rotor, thus providing exceptional Society, P.O. Box 1564, La Jolla, CA free flight ones have. The Model Air stability. 92037. · Fair was at the Seattle Science Cen­ ter, and it was a real challenge to fly FLIGHT CHARACTERISTICS there, as the flying site was a fountain “ The first flight was on June 14, Electric...... Continued from page 65 pond surrounded by the Science 1977. To date, the Cheyenne has on the motor and drops the current Center buildings. On one flight, a around 26 flights totaling about 3 downdraft set tne plane on the roof hours. The narrow gear, surprisingly back to a normal level (usually 8 to enough, is not a problem as long as 10 amperes on the ground). The net of one of the buildings, which rated result, if extra cells are added, is a story in one of the local papers; the cyclic is kept centered until more power, but with a smaller prop “ Mitcn Poling’s story in one of the ready for lift-off. You might be and at higher rpm. This is sort of like Science Center Roof!”. The Hawks interested in knowing that tne full- adding nitro to make racing engines were pleased ... it gave them pub­ size Cheyennes had cyclic-stick gain rpm; in our case, voltage takes licity for the Air Fair! Charge up and centering locks which remained on the place of nitro. Remember, if you fly nigh! · until the rotor was up to operating add voltage, go to a smaller prop, or speed. you could burn out the motor. ‘'DIRECTIONAL CONTROL is no Choppers.... Continued on page 41 problem. The high yaw inertia of the Anyhow, with the smaller prop, the the midpoint of the lever travel the fuselage apparently helps to min­ motor pylon can be shortened on imize directional nervousness. CO L­ seaplanes, which makes adjustment gear starts up. So, with the lever full forward, the gear is up and the prop LECTIVE CONTROL is solid and easier. Congratulations, Neil, on responsive. PROPELLER CONTROL some really fine work. is in full forward pitch. It's not ideal . . . but you make do with what you . . . well, what is there to compare it As far as I know, the Astro Sport is have! to? No problem so far. the first electric float plane to ROW. ‘‘Another unusual feature of this “CYCLIC CONTROL: The ma­ Let me know if there are others! The machine is that the gyro has 100% chine is exceptionally stable, being smallest electric seaplane I know of authority over the rotor, as in the capable of IGE hover hands off for 3 is my Electric Tern, which I designed full-size Cheyenne. The transmitter to 4 seconds (this may be more a and flew for the Boeing Hawks' controls the gyro by force inputs measure of John’s bravery than the Model Air Fair, in June of 1976. It (not displacement), and the gyro model's stability, I don’t know). The weighed 18 oz. with a Cannon super­ “flies” tne rotor. In the event the cyclic sensitivity is marginally ac­ mini two-channel and an Astro 020. rotor tip-path-plane is displaced (by ceptable, at least for the present, but It handled well on the water and a gust, for example) the gyro main­ I personally prefer a very crisp flew very well, but I never did try an tains its original position in space response . . . almost to the point ROW . For that matter. I have never long enough to provide a closed- where the transmitter input is a heard of an R/C model powered by loop feedback connective signal to ‘suggestion’ rather than a move- NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 127 P r o ROD NYROD S u-P r-ROD M A S TE R O D ASIEROD -XF

The Leader in ADVANCED Push-Rod Systems PLAINFIELD, ILLINOIS 60544

progressing cautiously. John “You are not alone in wondering Minasian has done all the flying to whether or not it was done for looks. date (I don’t trust myself). He has One observer thought the heli­ done a terrific job, and I'm thankful copter might be of Jewish extraction, for his expertise and patience. since he referred to the fairing as a “Because I have had about 20 'Yarmulke' (a Jewish skull cap). years' experience flight testing full- Since I am a Mormon, I can assure size helicopters (including the you that religion had nothing to do Cheyennes), it was only natural that with it either. we approach the model program “ Seriously, the fairing has a special the same way, and it has paid off. purpose in smoothing the air flow Before each flight, I brief John on over the rotor hub to prevent buf­ any design changes and their pre­ feting of the tail surfaces. If you are dicted flight characteristics. After familiar with the Hughes 500 series, 106 M ODELS · D E A LE R S W RITE · C A TA LO G 354 each flying session we sit down over you will recall that all models up 4 “ MAJESTIC MODELS^» coffee ana discuss every aspect of through the 500C incorporated a the flights, which includes taking 'butterfly' tail . . . upper and lower 3273 WEST 129 ST notes tor possible additional mods vertical fins with an asymmetrical CLEVELAND. OHIO 44111 (if required). horizontal stabilizer opposite the “ Right now, I’m working to im­ tail rotor, and set at a high diherdral ment of the stick. To achieve this, prove the cyclic sensitivity. After angle. Although these tail surfaces I’m looking for more powerful that, we’re going to look into the functioned satisfactorily, a visual servos (I hope I can find some). autorotation characteristics again. It signature was desired to set the ‘D ’ “I think the striking flight charac­ may open a whole new world in model apart from its predecessors, teristic of the Cheyenne is the R/C helicopters!” and the T-tail was born . . . the smooth, solid grace with which it Don, thanks a million for the horizontal stabilizer is now mounted moves. This is obviously a reflect of detailed report and fine photog­ symmetrically on top of the vertical John’s expertise, but also, because raphy. And thanks to John Minasian, fin. Incidentally, this configuration the four-bladed rotor becomes an too, for his efforts in coordinating also provided some improvements enormous gyro, and because the this report. We hope to hear more in handling qualities in certain flight fuselage is solidly mounted to it about the Cheyenne in future issues! regimes. rather than dangling below it like a HUGHES 500 REVISTED “ During the first flight tests of the pendulum, the airframe is not sub­ While we were looking over the ject to the short-period swinging 500D, a random lateral-directional incoming mail, one letter stood out, (roll & yaw) oscillation was exper­ oscillations observed in most R/C since it concerned the domeon John ienced in the speed range of 80-120 helicopters to date. Simone’s rigid rotor helicopter. knots. The magnitude of the dis­ FORWARD FLIGHT Rodney Taylor, Manager-Advanced turbance was sufficient to be un­ We have had it up to about 40 Planning for Hughes Helicopters, comfortable, and was a bit dis­ mph (estimated) and it has shown no did his bit and thoroughly explained concerting. After analyzing the the reason for the dome ... I think tendencies to tuck, pitch, or spiral problem, we theorized that the tail in. Even during a high-speed throttle you’ll find his letter quite amusing surfaces were flying through the chop, there is no appreciable pitch- and very informative. shed vortices of the blade tips and up tendency as experienced with all "Dear John: the wake behind the main rotor other rigid rotors, unless they have I justfinished readingyourcolumn hub. In an attempt toeither cure the closed-loop stability feedback. Inci­ in the August issue, where you problem or at least learn more of its dentally, tne rotors tend to pitch up commented on the dome-shaped nature, the incidence angle of the during a high-speed throttle chop fairing on John Simone's helicopter horizontal stabilizer was lowered because of a combination of posi­ and mentioned seeing a similar (nose down). This is a fixed stabilizer, tive speed stability and negative fairing on a Hughes 500 helicopter. not controllable in flight. The pur­ angle of attack stability . . . not due You wondered whether it was clone to 'tip stall’, as is often declared! for looks. Perhaps I can answer your pose was to cause the tail to fly lower, hopefully low enough to “Because of the model's extreme question, since I was the Project avoid the disturbed air. complexity, involving a number of Engineer on the Model 500D heli­ untried concepts, flight testing is copter during its development. “Flight testing helped confirm our

128 MODEL BUILDER BOB PINTO, FLYING A HELI-BOY, SWEEPS 1978 NRCHA NATS !! Other Recent H ELI-BO Y Wins: July 1978 NRCHA Nationals, Columbus, OH 1st Hot Dog (Bob Pinto I 2nd, 3rd—4th in Masters 1st in Sportsman e U c ° P T E R $339.95 Best Overall (Bob Pinto) h IN July 1978, Annual Helicopter Competition, South Ben , 1st in All Classes . A R BELL 222 June 1978, 2nd Annual R/C Helicopter Contest, Little H o c k , « 1st in Expert, 1st in Novice FUSELAGE May 1978 Rebel Rally, Jacksonville, FL KIT $89.95 1st in All Classes

e Your Local Dealer Or Order Direct From: Dealer Inquiries Invited EAST MID WEST fytuuiSit) Ejorliem S.C. M ODELER Oeeocieiee ALL HELI-BOY AND HEU-BABY Ä H08BY SHOP DIVISK* Mekl. rim s . Ca>v koelt « ·* « » . P »t» »o» *C Hottyiits CAO»0* 1*9« La rkin Avenue. Elgin. Illinois 40120 Ψ o BOX l>47 SPARES ARE READILY AVAILABLE. *»-«««» · ο*».«*»®». 805 498-3537 305 422-1531 312 697-3737

assumption that the phenomenon emphasize. For maximum perfor­ Kent, Washington, Vic Drew placed was rotorwake striking the tail, but mance, the K&B Auto Trim is a must second overall out of 39 entries in the new stabilizer incidence did not with the Excaliber II. This little the Outboard Tunnel Class. Those cure the problem. It only changed device allows for so many variations 39 entries marked the greatest num­ the speed range where the problem of engine settings that it is well ber of outboard tunnels ever raced appeared. Realizing that we would worth the price. I use one on all my as a class. Vic piloted his Excaliber II not be able to avoid the rotorwake, outboards. Something new that K&B to second in the enduros, third in the next approach was to reduce the has come out with since we wrote heat racing, and third fastest quali­ disturbance from the rotor hub. the plans is a Throttle Control kit. fier. He also accumulated the highest "A fairing resembling an inverted This is a neat package that includes single lap count for one five-minute salad bowl was designed and in­ the necessary tubing, cable, link­ enauro, with 11-3/4 laps. Another stalled, in spite of the skepticism of ages, and parts to connect the Excaliber II, raced by Curt Weston, the flight test department (Some­ throttle servo to the exhaust throttle tied for third place honors but lost in times helicopters defy reason and on the K&B .21 Outboard. a run-off, taking fourth place over­ analysis). Happily, after flying the I suppose one of the most impor­ all. It was the only commercially- helicopter with tne fairing installed, tant parts of any kit review is that available boat to place in the top the problem all but disappeared. part telling how the product works. five. We’re very pleased with the “I enjoy your monthly blurb even I’ve had tne opportunity to watch accomplishments of the Excaliber II. though my modeling activities do the progress of the Excaliber II It has scale appearance and has not include R/C helicopters. I fly during the first half of our outboard proven it can run with the best of sport power and sailplanes mostly, racing season, and the results have them. · but have an eye for John Pond’s Old been quite good. The boat has won Timer activity, having cut my teeth a good share of trophies at outboard on those birds as a kid. If I can be any tunnel events around our district. assistance technically, please let me The boat can be made to run very know. respectfully. I’ll just cite what I feel is "I hope this clears up the hub its most significant achievement this fairing question.” year. At the 1978 R/C Boating Cham­ FINAL APPROACH pionships, held in early August at Rod, thank you much for your letter ... it did me a world of good to get the right info on that dome NATIONAL SOCIETY OF RADIO CONTROL AEROBATICS situation. Between you and Don NEW MEMBERSHIP AND RENEWAL FORM pi(aM pRINT Lodge, I got off easy on this issue, and didn’t have to write until the wee hours of the morning! Hope­ Name ------AMA N o .______fully, more good stuff will be coming up next month. Until then, BCNU. Addrra______• Crty------Stitt ------_ zip _ _ _ _ _ Power Boats.. Continued from page 71 Competition Classification: a D b D much like a kit review, and I don’t C/DN □ c/DE CD plan to spend time in this article NEW □ REN EW A L CD N SR CA No______dwelling on the different phases of getting the Excaliber II out of the Dues are $6.00 for one year. shipping box and into the water. Send check or Money Order to: There is one item in the instruc­ NSRCA, e/o Sally Brown, 8534 Huddleston Drive, Cincinnati Ohio 45236 tions, however, that I’d like to NOVEMBER 1978 129 facility will be for all co u n ty modelers. C) A statement of the numbers of people involved in model aviation ATTENTION! . . . worldwide, nationwide, county­ wide. Note that we said modelers, not just R /C ’ers. All modelers have some interest in R/C. How many Control Line Flyers! modelers are there? AM A has stated that its membership probably repre­ sents about 1/100tn of the active Fox Cares About You! modelers in the country. To this you have to add those with a "some­ In the scramble for the R.C. dollar times” interest.. . even the guy who many manufacturers have by­ puts together a few plastic kits is a modeler, and might show more passed the control line flyers interest if he was aware of all the needs. Not so at Fox. In the last possibilities. It has been said that it couple years we have upgraded takes at least 1500 good customers to our control line motors and added keep one full-size hobby shop many new control line products. operating. The point is that your We invite your inspection of our club only represents a small portion of the county’s population inter­ tanks, control lines, bell cranks, ested in modeling. control handles, fuel bulbs, fuel D) A statement of the nationally line, wheels, wheel collars, and known people who are modelers. Fox Combat Special other products. Our catalog is Examples: Neil Armstrong, President 1978 Nationals Wins free for the asking. Ford, Orville and Wilbur Wright, Slow Combat Open For the beginner we have as­ etc. You probably have some locally sembled starter sets consisting of prominent people to add to the list 1- Dick Stubblefield - Fox (doctors, lawyers,etc.). 2- Larry Driscoll - Fox a motor, mounting bolts, fuel line, E) A brief description of R/C and 3- Geo. Cleveland - Fox tank, bell crank, elevator horn, what it is. Tell in layman's terms how Fast Combat Jr. wheels, wheel collar, fuel filter, a model operates, what can be done 1- Tom Fluker - Fox extra plus, control lines, handle, with it, and include references to 2- Mathis - Fox R/C and its use outside of the hobby 3- White - Fox and cups! All matched and at a considerable price savings over (government and industrial uses, as Fast Combat Sr. an example). 2- Bill Maywald - Fox buying them separately. We 3- Russell Crawford - Fox suggest you consider F) Describe exactly what is need­ Fast Combat Open #81015 Fox 15 Baffle Starter ed for an R/C field facility. Do not 1 -Phil Granderson - Fox minimize the requirements and/or Set For Profile Models — needs. Describe exactly what you 2- Mike Tallman - Fox $37.95 or #81016 Fox 15 3- Bob Mears - Fox would consider to be the finest 4- Kams - Fox Schneurle Starter Set For Pro­ possible, including support facilities such as rest rooms and shelters. Congratulations! And Thanks. file Models — $43.95 While most of our motors are Remember that you can always cut pleasure oriented we thought you back, but it can be difficult to add on later. Also, you will find that the might like to see how one of our bigger a project is, the more inter­ competition oriented motors ested officials will be! fared at this summer's Nationals. G) Do some research to find FOX information about other govern­ MANUFACTURING CO. S90S TOWSON AVE FORT SMITH. ARK 72901 SEND FOR OUR FREE CATALOG. ment model facilities. Much has PHONE 501-846-185« been written about such things in the magazines over the years. Clip out anything you find about the subject, no matter how small. Pic­ R/C Forum .. . Continued from page 31 dossier for presentaion to the county. At least 5 separate copies tures are good. Index the clippings the county, and the population will shoula be provided. There will be a with the magazine name ana date. have to understand it. You see, we number of officials who should have At the end of this section, list all the R /C ’ers DO HAVE RIGHTS, just as a copy as things proceed. The dossier magazines mentioned and the the rest of the idiots in the county does not have to be fancy, but it number of copies published each do! should be compiled in an orderly, month. As further information, 2) Appoint a “field committee” neat, and easy-to-read-and-under- include the names of all other of two members from the group that stand manner. The dossier should model publications. first met with the Commissioner. contain, in the following order: H) To close your dossier, obtain a These two should carry the ball A) A brief history of model avia­ letter of support from a local poli­ through to completion. They are the tion (probably obtainable from the tician . .. preferably two letters, one only members to be in contact with AMA). from a politician in each party. the county. It is important to show B) A brief history of the local To conclude this discussion: Do leadership and not create any clubs involved in the county. If there not expect immediate action ... it confusion. is more than one club in the county, takes time to get the wheels in 3) The club should compile a be sure to include them all. The motion. Do not be discouraged. 130 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER Keep an optomistic view. You will not oe turned down coldly, but you CUSTOM R/C CAR COMPONENTS may be put off. If you are put off, the door will be left open in some INC. manner; FOLLOW UP ON IT. Be very prompt in providing any • NEW HRE 1500 RS $169.95 additional information asked for, This new chassis has adjustable front and rear roll doing any research requested, and suspension for better performance on all track surfaces. in keeping all dates. You will be judged by your response to requests from the officials. Above all, re­ member that there is precedent showing that you are entitled to a facility for modeling. It is something which your county should provide; and you and your club should be the ones to create it. Just a little effort is required! We received a very nice letter from Keith Carlson, of Lathrup Village, Mich. Keith has some nice things to say about the R/C Forum (Thanks!!!) and also has some servo questions. Apparently, Keith realizes that when you use cable • HRE 1000 CHASSIS KIT $144.95 controls attached directly to the servo, you impose a loaa on the Basic chassis kit has performance where it servo that it was not designed for. I counts: had to refer him to the September 1st 1975 Roar Nats, Expert Oval issue column, which covered iso­ 1st 1975 Winter Nats, Expert Road lating servos via walking beams, 2nd 1974 Roar Nats, Expert Oval which, of course, is the ideal servo mounting for all reasons. However, All metal chassis parts, aerospace quality, kits remember that we get away without less body, engine, fuel tank and radio. walking beams regularly, so the W RITE FOR FREE BROCHURE word “ideal” is important. Appar­ ently, Keith has no room for walking HRE Inc., P.O. Box 4658, Irvine, California 92716 beams, and asks if the use of the new “ball bearing” servos would not do and really not a subject for this Otherwise, I have been contin­ just as well. From what I have seen to column. It is interesting to know that uing my propeller research, with date, the answer would be that the the servos did not come up to the some most interesting results. Again, ball bearings do not solve the prob­ claim made for them, and that there the basic material nas been pre­ lem. Mechanically, it would require has been a problem getting help sented in Model Aviation. If you an output shaft supported by two from the manufacturer. I feel safe in have followed it, you know that bearings some distance apart. Bear­ saying that, had these servos been there can be considerable improve­ ings have some play in them, thus purchased from any of the regular ment in propeller design, prin­ the load would simply twist the (name brand) radio manufacturers, cipally by reducing drag. Of interest bearing and be applied to whatever his problem would have been at this time is that I have been able to other structure there was to support resolved. be competitive in Formula I while the shaft. From what can be vi­ To close this month, some inter­ using drastically larger propellers sualized here, all the bearing does, esting sidelights from my own flying than is normal. Props with much as it is now being used, is to reduce so far this season. As members of the wider blades, greater diameters, and the friction of tne output shaft. At R/C fraternity, I think it is important even higher pitches have proven to the output of an extensive gear that, when we delve into something be, at tne very least, equal to the train, such a friction reduction a bit off the beaten path in R/C, we normal. At this time, some success advantage is questionable when should let others know what we find has been had with props as large as compared to a good-fitting sleeve out, how much fun we have had, an 11-7, using blades 25%widerthan bearing, as is normally used. and whether any good came from it. is normal. Ten-inch diameters have This column will be open to all such been proven repeatedly with wide Keith is also concerned about the information, and if you will provide blades and up to 7-3/4 inches of servo pot problem we discussed it, wé can be the vehicle to pass it pitch. The point is, these have been some issues back. His question is along for the benefit of others. one-of-a-kind attempts, and yet whether these faulty pots can be successful. Who knows what can lie found in both domestic and foreign As you may have noted in Model on the other side of the mountain, equipment. My answer was that Aviation, I have a full-blown pattern after some experience has been they nave been seen in all domestic bird flying with one of the new .40 gained? brands. I cannot speak for the for­ pattern engines. The M.A. story tells eign equipment. it all, but I do want to say that the One of the problems encountered Keith has also had a problem with project has proven to be a complete with these large propellers is match­ some “ mail order” servos that he success, and the performance is ing the performance of the engine purchased; they did not operate as even better than anticipated. If you to them. With the large reduction in advertised. My answer here is that are concerned with tne problems drag, we have seen a combined such problems are between the mentioned, you will find this "unloading” figure for the engine manufacturer and the purchaser, approach to be an excellent answer. and the prop.wnich amounts to 60% NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 131 pletion of my fifth year at the helm of the column. It will also be my last. Greatest Book of I hope to be able to review some of FULL-SIZE RUBBER FLYING the developments and changes in S C A L E P LA N S, plus the free flight sport and hobby next month. In tne meantime, if you have building, trimming, and SCALE MODELS the usual cards and letters tosend to flying instructions ever the Free Flight editor of Model published! OF W W II Builder, mail them to Tom Hutchin­ son, 3255 N.W. Crocker Lane, Albany, OR 97321. Tom will be Twelve half-inch scale Q + O o ... taking on the column beginning rubber powered flying with the January, 1979 issue. · models by some of the 12 FULL SIZE PLANS world's best modelers, R/C Auto .... Continued from page 67 including Doug Mc- the front of Car I. Put it as low as Hard, Clarence Mather, • HAfMUM hUMKAWI · possible, so that essentially no weight shifts to the rear. Accelera­ Bill Hannan, Bill War­ • fůcwt mnj TA-W1 tion drops to 1.17 g’s,and the weight ner, Bob Peck and shift is .98 lbs. . . so now the load is others. 3.98 lbs. on the rear, there is a 6.37- • MAXIMO |t rtv lb. force limit, and a 2.14-lb. side force limit for .71 g. At the front, the Compiled and pro­ FEATURE ARTICLES ON tire load is 1.15 lbs., and side force duced by I.E. Coleman, ALL 1/24 SCALE BUILDING, FINISHING, AND capability is (1.15 x 1.6 x .7) 1.69 lbs., Ι1/3ΓΟΊ FLIGHT ADJUSTMENTS. for a side acceleration of .79 g. So, edited and published for just 2 ozs. of weight increase, we by Model Builder Ma­ AVAILABLE NOW - $6’5 lost less than 3% of tne acceleration gazine. capability, but picked up 27% (.71 g SEE YOUR HOBBY DEALER, OR ORDER compared to .56 g) in turning capa­ DIRECT. ADD $1.50 FOR FIRST CLASS. bility under hard acceleration. The CALIFORNIA RESIDENTS ADD 6% SALES TAX. car oversteers a little, however, and FLYING we have to be somewhat careful. 621 West 19th Street Again, look at the big potential Costa Mesa, Ca. 92627 performance change for a minor SCALE MODELS weight shift. I tried adding a little weight to the front end at the last of thestatic rpm. Such a drastic in-air compensate for the loads an engine M cCoy race at Thorp Racew ay, increase in rpm requires an equally encounters, and, of course, the because I was having an accelera­ drastic increase in fuel flow to great changes in engine rpm. It tion understeer problem in the accomplish it. This appears to be would be wonderful to just set a sweeper going into the back straight. more than the normal fuel system carburetor at peak power on the About 1 oz. was added, and there can provide. If you would like to ground and to know that, as far as was a noticeable change for the simulate the problem, run up an fuel flow is concerned, the engine better . . . not a bad trade-off! In engine with a prop that allows 20 will have all it needs, no matter now fact, this is better than Car II. And, thousand or more rpm statically, conditions change in the air! Any­ we see that a little heavier car is OK, and peak it out. Replace that prop one out there have any experience, if the weight is in the right place. with one which will only allow a or even ideas? Next, let’s keep the weight of Car I peak of 15 thousand rpm. Without We have more letters but no more at 5 lbs., but lower the CG .060 in. touching the needle valve, you will space this time. We have enjoyed Again accelerating at 1.2 g, the note that when the engine is started, receiving and answering them. We weight shift will now be (5 x 1.2 x it will be far too rich; to peak it out, will be usingtheminfuturecolumns, 1.94/12) or .97 lb. The rear tire load is you will have to greatly reduce the and we would appreciate hearing 3.97 lbs., force limit is 6.35 lbs., and fuel flow. Our fuel system is obvi­ from you also! Tne address is 49 the side force limit is 2.09 lbs., for a ously not linear to the rpm. Golden Court, Buffalo, N.Y. 14225. side acceleration capability of .70 g. As of this writing, some flights The front tire load is 1.03 lbs., side have been made with a carburetor force limit is (1.03 x 1.6 x .7) 1.15 lbs., that provides in-flight fuel flow F / F ...... Continued from page 89 and the side turning capability is .58 control. In other words, to com­ g. The .060-inch CG lowering im­ pensate for an inadequate fuel doing free flight model coverings. proved cornering ability about 4%. system, an attempt is made to make K&B once made a very good prod­ Lowering the CG another .060 inch adjustments in tne air. I think that uct, but they have quit the market. changes the rear side acceleration the results so far show much poten­ Once you could order Flo-Cote to capability to .64 g, and the front to tial . . . you can have an in-air adjus­ do the job, but . . . wait! You still .60 g . . . so, from the original Car I, table system. We have not yet can. Try Bob Ellington, United Mod­ we navea7%(.56gto.60g) improve­ obtained the full potential from it, as elers, 2913 Edwards Ave., Bakers­ ment in cornering limit, and the car mechanical problems installing it in field, CA 93306. Cost is $3.50 per still understeers a little. More low­ the available aircraft have not allow­ quart, plus 50c postage. It’s an ering of the CG will cause power ed its full ability to be used. Even at excellent product. oversteer, and we’ll have to back off best, it appears to be just a stop-gap IN CLO SIN G the throttle to keep from spinnning measure. What is really needed is a The next issue of Model Builder, out. better fuel system, one which will December, 1978, will be the com­ Table I summarizes most of the 132 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUII DER above calculations. Notice that adding 2 ozs. of weight to Car I had more improvement than either fore/aft or vertical CG location. A little heavier car may not be all bad, if the weight is in the right place. All the foregoing calculations are SHIRTS DISPLAY THE EMBLEM THAT TELLS EVERYONE very idealized ana have been neg­ lecting the sideways (lateral) weight YOU'RE A SUPPORTER OF shift. The above results probably still show actual trends ... but possibly not for the exact CG or weight changes. Now let’s look at lateral (sideways) weight shift. Assume that our car has a track width (to tire centerline) of about 8 inches at the rear, and about 8.5 inches at the front (we’ll use the 8-inch track width). Also, assume that the car will corner at .8 β (calculations are easier for this “g’l under constant velocity conditions. The weight shift will be (5 x .8 x 2/8) 1 lb. (see Fig. 2). For our typical car (Car l|, about 60% of this weight shift is at the rear (.6 lb.) and 40% at the front (.4 lb.). From the earlier article on tires and weight distribution, we know that the cornering force will be greatest if the front and rear tire (COMING OR GOING . . . THE EMBLEM IS ON FRONT AND BACK!!) w eights are as close to equal as possible; therefore, the above weight shift certainly hurts cor­ $C95 nering ability. The approximate tire loads during cornering are .6 lb. EACH, INCLUDING THIRD CLASS POSTAGE. ADD 504 PER inside front, 1.4 lbs. outside front, .9 SHIRT FOR FIRST CLASS OR U.P.S. SHIPMENT. OVERSEAS lb. inside rear, and 2.1 lbs. outside ORDERS ADD 504 PER SHIRT. rear. If the above were an Indy car, we could shift some weight to tne inside to compensate for the weight trans­ MEN'S ...... Available in S, M, L, and X L sizes, and a choice fer during cornering. Let us suppose of white, yellow, or blue. we could shift the CG one inch LADIES ...... Available in S, M, and L sizes, and a choice toward the inside. Under static of blue or yellow. conditions, the rear tire loads are CHI LDREN'S . Available in S and M sizes, and a choice (see Fig. 3): of white or yellow. Inside rear: 3 in. x 5 in./8 in.= 1.875 When ordering, state style (men's, ladies, children's), size, and color. lbs. Outside rear: 3 in. x 3 in./8 in.=

1.125 lbs. Inside front: 2 in. x 5 in./8 California residents add 6% sales tax. in. = 1.25 lbs. Outside front: 2 in. x 3 in./8 in. = .75 lbs. £ Table II summarizes the tire load calculations for both the centerline MODEL BUILDER PRODUCTS CG and the 1-inch inside offset CG 621 West Nineteenth St., Costa Mesa, California 92627 under both static and .8 g cornering conditions. If the car were cornering at a more believable “g” value (.6 to rears (2 Ib./1.5 in. = 1.33, compared CG shift. An assumption that is part .7), the inside/outside tire loads to 3/2.5= 1.02). To be able to use the of the tire side force curves is that would be more equal. I worked a lot chart, we will multiply all the tire there is no acceleration or braking to shift the CG of my Indy oval car to loads by 500 (about 8 cubed), to forces on the tire. The 12° tire slip the inside, but only managed to get convert from 1.8 to full scale, and curve was used. Looking at the the CG over only about 1/2 inch. the front weights will be multiplied results of the front and rear side "g” There is no need to go further than by 1.33; the resulting side forces will capability, note that the 1-inch the 1-inch shift. be divided by 1.33 to compensate inside CG improved the cornering Now, let’s go to our old tire for the relatively narrow tires, and ability over tne centerline CG by traction chart and see what the then multiplied by .7 for tire com­ only 4.8% ... a relatively small cornering forces and "g’s” are for ound difference. The results will amount. On my Indy oval car, every­ the CG and the 1-inch inside shift. e divided by 500 to get them back thing heavy is positioned as far to For purposes of this set of cal­ to our scale (1/8) again. the left as possible. The CG is only culations, let us assume the front tire Table III summarizes the cal­ shifted about a 1/2 inch to the inside compound has 0.7 of the capability culations and results for these as­ of the car centerline, but the cor­ of the rear and the relative load on sumptions when used with both a nering force should be about 2% the front tires is more than on the centerline CG and a 1-inch inside better than a centered-CG car. Two

NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 133 power understeer when acceler­ ating; best to use on slippery tracks; turns well under coasting and braking. FLY EL CTRIC Toward the front: tends to give power oversteer when accelerating; some forward shift OK on high- VL-101 Electric propulsion system shown— using Hytork 48 motor and traction tracks; turns good when planetary gear box, SJ-3 switch & coasting but may tend to oversteer charging jack, and B-33L fast charge under braking. ni-cad flight battery— total weight VERTICAL CG CHANGES 2'/2 oz.— will power models 25 to (SIDE HEIGHT) 50" wingspan weighing up to 10 oz. Raising: more weight transfer to Send 50c for latest catalog showing rear wheels when accelerating; V L PRODUCTS full line equipment & accessories. Division of Vista Labs tends to give power understeer Hobby dealers send for information. 7023-D Canoga Avenue when accelerating; more side-to- Canoga Park, California 91303 side weight transfer when cor­ nering; tends to reduce cornering ability at steady speeds; tends to give oversteer when braking. f F LY ’N T H IN G S0------v Lowering: less weight transfer to RUBBER STRIP ■ SM ALL M ODEL SPECIALISTS: Complete , rear when accelerating; tends to rubber power supplies. Plus, Flyline M odels,1 FAI Rubber: Contest proven after four I R/N Models. Classic Models, M icro-X, Peck- | give power oversteer when accel­ years. Used by leading fliers WORLD­ I Polymers, F.H. Spokes. Shark C O j engines, , erating; less side weight transfer; WIDE. Made in USA. Endorsed by the 1 W illiams Bros, rubber. Japanese tissue. Pea ■ I nut balsa, and more! tends to improve cornering ability at best US rubber fliers. I W HOLESALE O N LY: Dealer, Distributor, i steady speeds or braking. Sizes: 1/4", 3/16", 1/8", 3/32". 1/16" and O .E.M . Sales. LATERAL CG SHIFT VINTAGE AERO · 1 THE GLEN I by 1 mm thick (.042). ______TENAF^LY^.J. 07670 ______J Tends to improve cornering ability Spooled. Gross weight approx. 1 lb. in direction of weight shift (e.g., PRICE: $9.10 per spool' incl. postage. use a little more discretion in shift­ right cornering improved if weight More than 1 spool, 504 less. ing weight sideways, because the car shifted to right); reduces cornering SAVE: We have 20 oz. spools of 1/4" has to turn both right and left. The ability in opposite direction; tends only, 25% more rubber, only big decision is how much to favor to give power understeer when $10.10 postage paid. one direction over the other, and turning in direction of weight shift; tends to give power oversteer in F . A.I. M od·I Supply what are the real effects on the overall car performance. To test opposite direction. Probably ben­ a t P O Box 9778 some of these ideas, I constructed a eficial in Indy oval cars; of ques­ Phoenix, Arizona 85068 car with the engine shifted to the tionable value in road cars. right about .8 in., and moved the CG Well, now you know as much as I percent doesn't sound like much ... about .2 in. further to the rear. What do . . . probably more, if you really but if we can pick up just a little, the happened? understood what the heels was saia. car will really be better. On pretty high traction tracks, the Now can you understand why some Another thing we have to con­ car now has power understeer on of the cars perform the way they do? sider is that when power is applied at mid-speed accelerating right turns, You might also understand better the rear wheels, side force capability and some power oversteer on left why some racers juggle things is reduced. We know that all (well, turns. Also, the car seems to be a around and make certain adjust­ almost all) Indy oval cars have a little harder to turn when accel­ ments. But, in the end, I hope it tendency toward power oversteer. erating than previously. Now I have helps you get your car going better A slight improvement in rear trac­ to enhance right turning a little on a given track. tion, particularly the lightly-loaded more than usual by means of rear I’m not quite ready to explain inside rear wheel, may make a much tire stagger (bigger tire diameter on some of the car layouts presented in bigger difference in true cornering left side) and heavier right front tire past articles. I have to get back to car ability. loading. With these adjustments, aerodynamics for an update first. For example, the inside rear wheel the car seems to be more appro­ "Car Aerodynamics: Revisted” will side force in the above calculations priately balanced. In other words, be my next technical article. If you for centerline CG and 1-inch inside the car handling has changed about have any questions, don’t write . .. shift CG was .99 lb. and 1.24 lbs., re­ the way expected . . . but now, but if you want to straighten me out spectively. One would expect that, compensation has to be added to or make comments, please write: for the same side force contribution bring the car back toward more Chuck Hallum, 18276 Foxglove Way, of this tire, much more power can balanced handling. So, all that was Irvine, CA 92715. · be applied before it begins to slip. accomplished was to show how car The power application improve­ handling changes with CG shifts. But Nats Pylon ... Continued from page 39 ment before slip may be as much as then, that’s sort of what I started to 10 to 20 percent. This means the do. Tigre still seems to have a very slight oversteer acceleration, or speed OK, now let's have a quick sum­ eage, at least in numbers. Planes? condition incorneringhasimproved mary of CG locations, or shifts, and Looks like the Polecat is beginning considerably. The .5-inch CG shift their effects on car handling. Realize to do a number on the Little Toni. that my Indy car has might give 5% to that all the calculations that were Fuel? Amazingly enough, there 10% more acceleration or side "g” made were approximations, and seemed to be a lot less problems capability before the car goes into values may not be correct ... but with high nitro than there were last power oversteer. Now that’s more the trends are probably OK. year at Riverside; this, despite the like it! FORE/AFT CG SHIFTS much higher hum idity at Lake Now, in road race cars, we have to Toward the rear: tends to give Charles. From those we talked to,

134 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER generous head spacing was the reason so many seemed to be run­ ning so well. cleBoli COVERUP! On the unfortunate side, there Sturdy, dark green vinyl covered were two mid-airs and four auger- is ins. On the brighter side, Irwin binders for your valued copies of Funderburk, of Monroe, North d 'N u t s r MODEL BUILDER. Gold logo. Carolina, turned the fast time of 1:13.8. Californians took the top *11. MASO H/C SALES CP.TEB to···» pr»*·· ·η)»·η·Γ·ί three places. Ron Schorr was num­ »•ccwJttlonPdt y— r r«e t ·# ·χ·1··»Ιγ »Κ·Ι ber one, with 27 points. He also took A U »M S P A/C SERVICE c o m a t*p*p»*re«

NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 135 vousness, to take his mind off the seriousness of the competition. Under such conditions, a potential loser is apt to relax just enough to The Pipeline make that fatal, last-round decision in fillinq ih· neede of R/C boater that will catapult him unceremo­ niously into the winner’s circle. P.0. BOX 1868, FREMONT, CA 94838 Someone once observed that, of the top ten pilots at any contest, at A Complete Line of Boats, Hardware least four of them will be out on the field helping run the contest at any & Accessories from the Leading given time. Don’t mix with these Manufacturers nigh-energy, overenthusiastic types . . . their spirit is contageous. The Also, Custom 1/12 only way to be certain of losing is Scale Electric to sit the contest out in your RV, Car Parts, watch a little TV between your CATALOGUE $1.00 flights, chug a few beers. You might want to check your watch every few contest launches, another unfair minutes, and bitch about how slow advantage. the contest is going. But the impor­ FLY ONLY THE MAJOR CONTESTS tant thing is that you never for even One or two contests a year are a minute take your mind off the mistakes you made on your last usually plenty to maintain your flight, and the mistakes you’re likely amateur status, especially if you to make on your next. In short, stay avoid practice in between. Try to tight. support as few of your local and club Plans & Construction Manual I realize that no list of this sort is •CURTISS HAWK ΡβΕ I 'STINSON RELIANT SRB contests as possible, to avoid gaining '4 S ca le 0 4 .B 'S p a n § 2 2 * 0 S e a l# 126" S p a n ·2 β . ·° ever complete (even the Ten Com­ 2-Scale 03" Span W2.«> 2’Scale β4*8ραη »15.·° too much competition experience. iVt* S ca le 47^*” S p a n ·1 0 · ° [ i V S c a l a 03* S p a n · 1 2 · ° AVOID MAN-ON-MAN CONTESTS mandments are a bit sketchy about • C U R T IS S 0 0 8 H A W K P11C* certain points of International Mari­ 2* Scale «3* Span ·1Β.οβ Nobody likes to measure them­ •CURTISS OULFHAWK 1A time Law, and how many cocktails • « » 2* Scale 63* Span «1SP° · New U 8cala 04 V Span 030-°° selves against "better" pilots, espe­ P t ···· Ana »' »Ο P·/ Ortíer (o' «*ο·ι·0· »na Manaline constitute a deductible business OutakMU B Add · »00 Maka all Paymania to: cially in the same air: it makes a lunch). But the main rules for suc­ Richard G. Barron 121a Hony spring Ln. person's mistakes too painfully Qrond Blanc. Michigan 48430 Band ai oo lor CompMg Mormallon cessful losing are all here ... it obvious. And how mortifying it is to remains only for you to put them discover that someone else in your into practice. Tack a copy of them to launch group is getting a higher the inside of your liquor closet, or things about the air that even the six launch out of the same design you're o'clock weatherman doesn't know. flying! your water closet, or your neighbor’s And such knowledge can be fatal to DON’T WATCH THE CYCLES OF closet, or any place you’re likely to see them often. Memorize them. a pilot’s amateur status. LIFT AND SINK BEFORE YOU FLY DON'T EVER USE A WINCH, Don’t ever volunteer to sit on a Then shuffle off to your next contest EXCEPT AT CONTESTS winch for five or ten rounds before with the confidence of a born loser . . . you know just what you want, God invented latex. Henry Ford your own flight group is called. If invented long-shaft starter motors. and how to get it, now! you did, youxl have nobody asking Welcome to the crowd. · From these two facts, it should be you to time, nobody interrupting obvious that God intended us to your study of the air with their idle launch sailplanes with high-starts, chatter, nothing whatever to keep F/F Scale .... Continued from page 85 not winches. Winches are a malev­ you from scrutinizing the flying and olent by-product of the Military- landing habits of the best pilots on enjoyable. Bob had an array of Industrial Conspiracy. They were the field. You’d be in mortal danger models that were very competitive. meant to be feared, intended to of learning something that would At 6 pm the flying stopped, and stimulate our adrenalin flow. Avoid improve your flying, and we all everyone went back to the motel to them when sport flying, and espe­ know that's not what losing is about. get cleaned up for the evening’s cially when practicing tor contests. DON’T PLAN A FLIGHT festivities. There was a banquet that To spend an entire afternoon with IN ADVANCE I'm sure no one missed, and after an electric winch is to lose one’s It’s always better to come off the eating, Bill Brown, of Brown Junior innocence forever, to become winch and simply follow your in­ Engines, was the guest speaker. He friendly with the enemy. Can you stincts, you can always follow some­ told about some of the history of his really afford to lose that blinding, body else’s airplane, or the outline company and what is going on today paralyzing flash of adrenalin that of a convenient cloud, or the flight with his C O 2 engines. One item that comes from stepping up to a strange of a passing bird (be wary of hawks you may find interesting is that he is and frightening launching device? and buzzards, which may lead you planning to come out with a CO 2 Not if you want to continue losing, inadvertently into lift. Stick with engine small enough to fit into a you can’t. chickens or passenger pigeons.) Peanut-size model. He hopes to get this going in the fall. Besides, people who alternate Above all, trust to luck . . . almost all between winches and high-starts losers agree that thermal soaring is Sunday’s flying did not start until soon find that theoptimum rearward largely luck, anyway. noon, due to the restrictions of the towhook position for winching may NEVER PITCH IN TO HELP Navy base. The weather this day was be as much as a full inch behind the RUN THE CONTEST not as good as Saturday’s, but it was optimum position for high-start Timing, scoring, running the still quite good for flying. The events launching . . . and such knowledge w inches. . . all of these tasks tend to for this day were Thompson Trophy, can easily lead to much higher distract a pilot from his own ner­ AMA Rubber Scale, Peanut Scale, 136 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER 1977 INDY UNLIM ITED: WIN WITH THE WINNING COMBINATION 1st, 3rd. 6th, & 8th OF FIR S T 10 OCTURA WING-DING PLUS OCTURA PROPS & HARDWARE OUT OF 124 ENTRIES (Overall winner 4th year in a row) 1977 IMPBA ANNUAL REG ATTA: 1st in Class E Straightaway 1st in Class F 1/3 Mile Oval 1st in Class E 1/3 Mile Oval 1st in Class E Multi 1st in Class F Multi 1977 NAMBA NATIO NALS: All but one of the winners used Octura Props, most all used Octura Struts, Rudders, Etc. Multi: 1st in Class X 2nd in Class X 1st in Class B 2nd in Class B SEND50< FOH CATALOG AND PRICE LIST 2nd in Class A _ _ _ ... _ _ _ _ _ —______7351 N. Hamlin Ave. Plus! New NAMBA Oval Record OCTURA M ODE L 5 INC. Skokie, III. 60076 of 1 min., 13.4 sec.

Jumbo Scale, WW-II Jumbo, and (featured this month in a construc­ trom three counties. The western WW-II Peanut Dogfight. Another tion article!), and Gordon Roberts states are so large that most modelers day where the skies where deluged had a neat Douglas TBD. Jack also will not drive tne required number with models of all sizes and shapes! won the Jumbo Combat event with of miles fora weekend of flying. Our The most thrilling event for me on his Defiant. Annual here is not in the summer; Sunday was the Thompson Trophy. Trophies and prizes were awarded therefore, the time factor is a very This is another mass launch event at the field at tne end of the flying important consideration. In the and includes some of the most day by Lin Reichel, the C.D., ana his eastern half of the U.S., the states are beautiful airplanes ever designed. hardworking judges. There was so much smaller by comparision that certainly a note of sadness as the driving from state to state is not that Of course, this is my opinion, but it is rains started and all the modelers much of a problem. Yet, two def­ sure hard to knock the racing planes packed and headed home ... an inite similarities between fliers here of the thirties for sheer beauty. The experience in modeling that I will and there is that they are at contests Flying Aces have elimination heats, to have fun, and not to hassle some called the Grieve and Shell Dashes. never forget. There is a lot more to say and cover, but no matter what, I judge for not doing this or that. This Those models that survive these would not be able to do justice to it. seems to be the common bond that heats end up flying in the Thomp­ There was just too much taking place most all scale free flighters have, and son. Therefore, only the best six or it is a good one. seven racers compete in the Thomp­ all at once! son. I would like to consider the fol­ What about the future of the I didn’t get a chance to see any of lowing as kind of a postscript to this F.A.C. Nationals? One thing for the Peanut models in the air, but I “ happening” . First off, Bill Noonan certain is that it will not be an annual did get to see many of the fine and I were, I’m sure, the only two in occurrance. Why? Bob Thompson Jumbo models fly. There is no ques­ attendance west of the Mississippi. feels that is it were held every year, it tion that the larger models are We were treated absolutely like would not have the significance it poetry in motion. These majestic royalty. I had so many modelers had this first time around. Most of us come up and introduce themselves fliers are a sight to behold as the feel pretty much the same. Now, the and compliment this magazine and thought is to have it every other sunshine filters through the struc­ this column, that I was continually ture while they circle overhead. Jack year. Where? That is a good aues- walking on a cloud. Onesuch gentle­ tion. My initial thought was to nave Moses won nands-down with a man was Earl Stahl .. . this really Boulton-Paul Defiant, which had a it on the West Coast one time and on best time of 82.5 seconds. Other made it for me! the East Coast the next, but the more models in this event included a One of the remarks I kept hearing I consider it, the more I realized that Kingcobra P-63 by Russ Brown, a was, "How does this compare with it just wouldn’t work. What would Schlepp C-3605 by Don Srull, Bob your scale contests out West?” My happen is that when it is held in the Thompson had an Ant-25, Leon pat answer was, "There is no com­ West, only western modelers would Bennett had a huge Pazmany PL-4A parison." The Flightmasters draw attend. When in the East, only the

D A TE R E C O . SOCIETY OF ANTIQUE MODELERS

MEMBERSHIP APPLICATION NO. DO NOT W RITE IN TH IS SPACE I hereby make application for individual membership in the Society of Antique Modelers.

NAME ______BIRTH DATE ______YEARS MODELING

ADDRESS CITY STATE ZIP Please check if you belong to any of the following: Note Membership includes 15% discount on one year M ODEL B U ILD ER Magazine subscription. Give S. A. M. No. when subscribing. A. M. A. ______NO______Enclose Membership Dues of $5 00 and send to. M. E C. A. Society of Antique Modelers NO.. 1947 Superior Avenue Whiting, Indiana 46394 S. A. M. CHAPTER NO.. In making this application for membership to the Society of Antique Modelers, I agree to abide by the rules set by the Society and realize that the goals of S. A. M. and the Old Timers movement are to encourage participation above competition and is dedicated to the preservation and reproduction of vintage model aircraft. ______S i g n e d ------NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 137 Saginaw Bay R/C Boat C. Robert Hughes SAIL CONTROL WINCHES 126 Vestry Dr. Saginaw, Ml 48601 N.|. Model Corinth S.C. Walter Pilcer 150 Mohawk Trail Wayne. N| 07470 Orlando R/C Model Yacht Club Mark Norris 627 Delaney. Apt. 15 Orlando, FL 32801 Ocean State Model Yacht Club W-1 . . . $59.00 W-2 . . . $119.00 Harold Belknap 511 Logee St. • Custom R/C design for all boat sizes · Power - 40 in. lbs. «Travel Woonsocket. Rl 02895 time - 5 seconds »Voltage - 4.8-6 (W-1) »Size -2x2x5 inches. Heckscher R/C Model YC The Probar W-1 is mechanically operated by a separate, neutralizing Richard Wischer servo. The Probar Propo W-2 is designed to plug directly into the receiver, 3 Gary Street and requires no extra batteries. Specify Kraft, Futaba, or no connector. East Northport, NY 11731 Both winches are fully assembled and tested, ready to install. A ll mounting No. Cal. Soling O /D Fleet #2 hardware, switch pushrod (W-1 only), and winch arm blank are supplied. Howard P. Brown 130 Bayview Ave. STAINLESS STEEL HARDWARE: MISCELLANEOUS ITEMS: Vallejo, CA 94590 Turnbuckles, Chainplates, Goosenecks, Sheet exit guides, 3owsie, Boom vang pivots, Pad eyes, Tangs, Rudder posts. Mast head Michigan Model Sailing Deck cleats, Boom cleats. Rigging wire, fitting. Dacron sheet line. William P. Crump Dej/er inquiries invited 1301 US 131 So. PROBAR DEBIGN P.O. BOX 639 ESCONDIDO, CA. 92025 Petosky, Ml 49770 Tidewater Model Sailing Club Virgil H. Haywood eastern modelers would attend. enough, Bill Turner, who is having 3900 Bruce Rd. Let’s face it, how many are willing to the Gee Bee built, flew into Flabob Chesapeake, VA 23321 drive two thousand miles for a Airport in his replica Brown Racer So. Australia Radio Y.S. weekend of flying? It’s a tough "Miss Los Angeles”. So, both the Ric Doorey problem. I know that I’ll make tne Gee Bee and the Brown Racer are 28 Huntington Ave. second one, no matter where, be­ parked together in the same hangar. Fulham 5024 S. Australia cause I’ve been to the first one, and I It is a sight that few will ever have the Miami Valley MYA don’t want to miss out. Plus, where pleasure of seeing! · Don Theobold else can you see nearly 400 scale 918 DeSales St. models? There were 252 models Vandalia, OH 45377 Sailing...... Continued from page 75 entered (those that qualified), with R/C Skippers Assoc, of Baltimore 81 contestantsand743official flights! Jim Macneal I’m lucky that my wife and family Rochester MBC 9 Haylock Ct., #101 like to travel also. Whatever hap­ )im Latoy Baltimore, MD 21236 pens, I’ll keep you posted. 32 Baylor Circle Montreal Model Y.C. In closing this month's column, I Rochester, NY 14624 Fred Jennings want to say that my homebuilt R/C Vikings 2082 LaPierre St. biplane is going together for the Cliff Niesen Ville LaSalle. Quebec, Canada final time. Hopefully, by the time 345 Modoc St. After a very long stint as AMYA you read this, it will have flown. Crescent City, CA 95531 Secretary, Bob Crysler is finally While waiting to get enough hangar Mystic Model Yacht Club going to call it quits. I’d like to doff space to assemble this five-year John E. Carbarino my nat to him for sharing these project, I have been helping in the Skiff Lane, Masons Isle Mystic, CT 06355 columns, as his name has appeared assembly of the full-size replica Gee in almost every one of them. Bob’s Bee Model Z. If this isn’t thrill replacement has been designated, and all AM YA dues should now be sent to: Robert Espenshade, 7221 Casa Adobe, Citrus Heights, CA CARR SAILS 95610. 7608 GRESHAM ST. Westburg .... Continued from page 33 SPRINGFIELD, VA. 22151 Chicago, they split up into two STANDARD ON ALL CARR SAILS flights, one going north and the Finest American-m ade D A C R O N sailcloth other south. They rendezvoused Vinyl, press-on numerals and insignia Heat sealed edges eliminate fraying over the Michigan City beach, Coated, stainless steel jibstay installed where Pete was an assistant life­ Rolled-edge grommets in tack, clew & head Bolt-rope mams l luft mast attachment guard. It must have been an incred­ Santa Barbara $30 00 10-Rater $30 00 ible sight . . . Pete says that every P- East Coast 12-Meter $30 00 50/800 (M-class) $30 00 36/600 $25 00 Internat A-class $35 00 6E, P-12, and P-16 from Selfridge West Coast 12-Meter $30 00 Star 45 $30 00 Field must have been escorting Vanguard "J'-boat $40 00 T&A Petrel $30 00 them. Scale vessels, special purpose boats, one-of-a-kinds Wnte for a quote, and for our 1978 Brochure and Used Sails List Pete was auite an active modeler at this time, ne had built quite a few 138 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER rubber and scale models, and when WANNA START At last, a spring Maxwell Bassett flew his Brown Jr.- starter for TD/Med {Realistic powered ship, Pete just had to have SOMETHING? .049/.051 glow or one too. He and his buddy, Harold diesel. $2.95, plus Ford, pooled their money and 50«! postage and r/c sailboats handling on direct bought a Baby Cyclone for $12.50. orders. They built a model out of soldered Diesel conversions, aluminum tubing, balsa, and paper, R/C or regular, for and used Firestone ashtray tires. The .020, .049/.051, thing was tailheavy, but it flew. They and .09 chased it through fields and a far­ Haff-A performance accessories; teflon reed valves, piston reset tools, heavy-duty mer’s potato patch until it ran out of reed model crankshafts, cylinder devarnish- gas. It broke up and never flew ing brushes, etc. again, but Pete and his friend were Dealer inquiries always welcome. Literature walking on air because they had the requests; please send SASE. first gas model that was ever flown in Davis Diesel Development Inc. northern Indiana. BOX 141, DEPT. M8. MILFORD. CT 06460 Model Airplane News published PHONE: 1203) 877-1670 several of Pete’s later designs. He told us that one of them, the WF-3, Eisenhower cancelled it, but Pete was flying in a big, lazy circle at 600 and two other engineers got a job feet one day, when the left wing designing a new nose for the Honest gave up the ghost and fell off. The John nuclear warhead rocket. They rest of the airplane spiralled into a did so well that the then-new Santa swamp, and just as Pete was picking Monica Missile Division gave them it up, a flatbed farm truck roared up the job of designing tne Bravo and the driver yelled, “Where’s the missile, which turned out to be a pilot?” Needless to say, gas models rousing success. When NASA came were rare in those days, and virtually into being in 1958, they took over We make model sailboat kits for radio control, also unheard-of by people in rural areas. the Bravo program and renamed it spars, hardware, sails, winches. Mail order only. Delta. The Delta missile was used to Write for free illustrated price list or send S2.00 for It didn’t take Pete long to decide complete information package to make aviation his life career. launch the Echo balloons and early During the lean years of the Depres­ weather satellites, and is still going Vortex Model Engineering strong with something like a.2% Department MB sion, he studied from books and 210 East Ortega Street took a correspondence course in failure rate. Santa Barbara. CA 93101 aircraft drafting from Curtis-Wright In 1960, Pete was transferred from Tech, paying for it with money Tulsa back to Santa Monica and earned from a WPA job. In 1939, worked in missile engineering man­ more than five dollars, a wife, a Pete hitchhiked to California and agement for the next ten years. After daughter and son-in-law in Seattle, got a job with Lockheed. He quit the moon landings, Pete could see and two grandsons. three months later to go to work for a downturn coming in the missile Before he retired, Pete knew he Douglas, in Santa Monica, Califor­ business, so he took advantage of a had to havesomethingtodoto keep nia. In December, 1939, the engi­ good retirement and savings plan him off the streets, so he began neering department asked any em­ and left ten years early, in April of making detailed drawings of air­ ployee with drafting experience to 1970 . . . almost exactly 31 years after planes of his favorite era, the 1920’s come in for an interview. Pete did, arriving in Los Angeles with five and 30’s, and especially biplanes. and was hired, but it wasn’t the dollars in his pocket. Today, he has Pete draws mostly for model certificate from Curtiss-Wright that did it; it was a copy of Model Air­ plane News that had one of his gas model plans in it! Pete stayed with Douglas until 1947, when he took a leave of ab­ iSM^Ti.oRS 00 M*¥ t sence to work on the infamous Davis jg|c J O I N TH E / three-wheeled car; he was the chief AMERICAN MODEL YACHTING engineer of the company. When the law caught up with them, Davis went ASSOCIATION to jail for two-and-a-half years, and SEND $5.00. YOUR NAME AND ADDRESS TO Pete went back to Douglas via North ROBERT ESPENSHADE, 7221 CASA ADOBE, American Aviation. He worked as a CITRUS HEIGHTS. CALIFORNIA 95610 designer, doing such things as con­ trol surfaces and wing flaps. He worked on the Mixmaster, C-75, Super DC-3, and the DC-6,7, and 8; he holds a patent on the wing flap on the DC-8. In 1956, he transferred to the Tulsa, Oklahoma, division along with sixty other engineers. He was supervisor in charge of doors and AMYA control surfaces on the XC-132, a turbo-prop transport bigger than the Lockheed C-5A. President NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 139 include the P-12/F4B, Keystone bomber, Thomas Morse 0-19, Hell- diver, Hawk P-1, Goshawk, Consol­ 0 ^ JOHN POND idated PT-1/PT-3, A-12 Shrike, and whatever else he can get his hands on. Old Time Plan Service Pete would like to thank everyone The largest selection of plans in the world at the most who has sent him data, as none of his drawings would have been possible reasonable prices. Each list 75c without someone’s help. He also requests that if anyone writes to him No. 9 OLD TIMER F/F GAS for any reason, please include a No. 9 OLD TIMER RUBBER/TOWUNE stamp, as his postage bill has gone No. 9 OLD TIMER FLYING SCALE A through K out of sight! · No. 9 OLD TIMER FLYING SCALE L through Z Counter...... Continued from page 10 P.O.Box 3215 some dealers, or direct from San Jose, Calif. 95156 Ponchartrain Distributors, for only ^ Phone (408) 292-3382 ^ $145. * * * Next to “the radio quit", probably built. Another good source is the the most-used excuse for crashing is National Air and Space Museum at “I couldn't see it”. Well, present- the Smithsonian, which is regularly day radios just don’t quit as often as visited by Walt Stampfli, a good claimed, and if you use Applied friend of Pete's. Walt flies DC-10’s Design Corp. "Jewel Stripe" tapes, for United, and whenever he goes to figures, and letters, you are going to Washington D.C., he tries to spend a few hours in the NASM looking for have to go to excuse No. 3. These data. Walt has found all kinds of self-adhering mylar tapes and pre­ goodies and has brought back cut characters are not only dec­ pounds of xerox copies of test and orative but practical as well, as they Hold ell models any position lor BUILDING­ will add to your model’s visibility COVERING - GLUEING- TRIMMING-REPAIRING flight reports, microfilm, drawings, etc. Pete says a lot of his drawings even on those dull, dingy, cloudy d q c q mOOEL PfiOOUCT/ days. PO Box 14078 would not have been possible with­ Omaha, Nebraska 68114 out Walt’s help. New additions to the already extensive line are letters and num­ Pete's drawings begin with a pen­ bers, in 1, 2, and 3-inch sizes, and in cil layout, drawn on vellum, and your choice of silver, green, blue, builders who like to design and consists mostly of basic lines and orange, green, or red. build from scratch, but who have dimensions, such as frame and rib These new ADC goodies are intro­ trouble finding accurate plans. Pete stations. The final drawing is done ductory priced at 10c each for the 1- also draws for collectors who like on two mil mylar, frosted on botli inch, 25C for the 2-inch, and 39c for old airplanes. Half of the letters he sides. Areas with a lot of detail, such the 3. The 1-inch "Jewel-Lettes” are receives are from fellows who write as the landing gear, engine, etc., are also available in packs of 84 assorted to say how much they enjov just drawn on separate sheets of vellum characters, at $3.99 per pack. looking at the drawings. One fellow and then traced onto the mylar. Pete Look for them at your local shop, wrote to say that he went home from uses Rapidograph jewel-tip pens, or write Applied Design Corp., 738 the hospital a day early because his which cost about fifteen bucks each. Penn St., El Segundo, CA 90245. Falcon drawings had come! Pete He uses a No. 2, 1, 0, 2X0, and 3X0. Obviously, the use of these letters says that one of the letters he re­ The actual drafting on the mylar and numbers is not limited to ceived was really eyeblinking. The takes about one week per sheet, if models; they will work anywhere handwriting was horrible . .. then at Pete works eight hours a day, which that you need a sign or lettering. the end the writer apologized. It he doesn’t. On the average, he turns * * * turned out that his hands were out five or six sets a year. By far, the useless from a burn accident and he most time-consuming thing about Bob Smith R/C Aircraft has in­ had to write with his toes. Maybe doing the drawings is the research formed us that it has started ship­ that’s another reason Pete keeps and waiting for answers. Pete says he ments of the new T2-40, a .40- drawing. has been researching the Stearman powered version of the popular You probably won't be able to 4E (which will soon appear in Model T2-A pattern and sport aircraft. find drawings more accurate than Builder) for two-and-a-half years, The T2-40 spans 40 inches, with an Pete’s. At first, he got a lot of his data and still hasn’t located any factory area of 540 squares. Flying weight is from the Douglas engineering files. drawings. Just recently, he found between 5-1/2 and 6-1/2 pounds, Then, as he became Detter known, out why; all the original drawings of depending on engine, radio, finish, other people started helping out the Boeing/Stearman aircraft prior etc. It uses a precision-cut foam with photos and drawings. It’s a self­ to the PT-13 were destroyed in a wing, with a 16.5% thick root airfoil generating thing; the more draw­ flood. Fortunately, Pete has been and 18% at the tip. ings he makes, tne more contacts he able to come up with enough data, The kit features an epoxy fiber­ makes. One of his best sources of including measurementsanaquitea glass fuselage, which has the canopy data is the Wright-Patterson AFB. few photos of the one in the and vertical fin molded in. The stab They have microfilms of production museum in Ottawa, Canada, to is also foam, and the 1/64 ply cov­ drawings of just about every Air produce some excellent drawings. ering for it and the wing is furnished. Service and Air Corps airplane ever Pete says his future drawings will All wood parts supplied are ma- 140 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER chine-cut, and all necessary hard­ ware is included. FREE FLIGHT The T2-40 may be built with either HARDWARE PLANS” fixed or retractable gear; fully root». Accessories * precision c a s t in g s y V detailed plans are enclosed. WINDING ~V BALSA a ll k in d s At $89.95, this sounds well worth HØØKS STRIPPERS b/v£&&all shapes considering next time you are u n u m it s d to p e a n u t #·** AMD is" LENGTHS looking for a high performance, yet ISO MOUNT4 (· economical, low winger. Dealer and !dETEX hot wire girgle towi - A a " distributor inquiries are invited. n lř s iz e s ! Contact Bob Smith R/C Aircraft, COUPE HUB BjT KIT HOOKS j KAOIAL flT9: porsrer is, res 9525 Cozycraft Ave., Unit H, Chats- I SMOINe m ountOUNT^ft TOKFSOO, OAK tS AMO S I worth, CA 91311. CATALOG S 1.00 The M.A.P. range of plans * * * dIM CRØGKET REPLICAS from England A new IMPBA and NAMBA-legal 1442 N. FRUIT AVE. is the largest, deep-vee R/C boat has just made most compre­ FRESNØ. GA. 93728 hensive in the the pond. It is Steve Muck s "Mighty world. Buy a Dolphin”, a deep-vee day cruiser J plans handbook for 6.5 cc engines and two-channel Peck-Poiymers and find out for yourself. radios. The handbook contains full the 'PÍAHUT PEOPLE" details of all of our thousands This all-wood kit features frames, of plans and their prices. formers, and sheeting pre-cut from Many of these plans are high-auality aircraft plywood, and available from our U.S. agents includes a radio box, plexiglass listed in the handbooks. radio box lid, turn fin, screws, and H K* J3 CUB Handbook 1 Aeromodelling step-by-step illustrated building QUALITY PEANUT SCALE KITS Handbook 2 M od a l Boats and Cars instructions. OHM I HI \IK< ΚΛΗ H.WN Handbook 3 Modal Engineering A stern drive hardware set for the & J,4Pi.\K\K ll\sl h . rn o m .I.E R S Handbook 4 Radio Control Aircraft MK)ES.El U. VE IIE I.m i ///.V M "Mighty Dolphin" is available sep­ IICMiKKKOKl) SPOKE WHEELS arately. It includes ride plates, stern UIM η.Ί. HSR · c a V IE Y l Hl URER j\model&nilied drive and rudder brackets, rudder, COMPLETE MAID ro UNO ACCSSSOtliS. KITS AMO water pickup, screws, and 3/16-inch CATALOG $1.00 nAns ro · tustit row t »to modils I ma^> Publications Ltd flex-cable drive line assembly. ^ PECK-POLYMERS Available in the U.S. A. PHONI IM4I <69-«67S o. 12141 442-4*16______y Kits No. 59 for the boat, ana No. 65 Price $1.50 each including postage from: for the hardware set. From Steve Γ SSales ale Office. P.O. Box 35. Bridge Street terials for pilots and scale detail. Hemel Hempstead. Herts. H R 1EE. Muck’s R/C Boats, 6003 Daven Oak L____ : En glan d Dr., Dallas, TX 75248. Both finishing kits include cements, plastic putty, brushes, a knife, sand­ * * * paper, a drop cloth, and gluing tips, From The Hi-Flier Manufacturing and your choice of all flat or all Co., 510 East Wabash, Decatur, IL That interesting looking vehicle in glossy paints in the most-used colors. 62525. one of the photos is Testor's newest Look for them at your favorite . .. the Galax IV Planetary Surface model shop. Forfurtherinfo,inquire Explorer. This ground effect ma­ from The Testor Corp., 620 Buckbee R/C World . . . Continued from page 19 chine, or “powered space skimmer”, St., Rockford. IL 61101. Tell them MB as Testor’s calls it, is powered by an sent you. and contest officials. .049 engine, and actually floats as it moves, without touching the * * # WHERE-AT’S THE PILOT? ground. Kite lovers, behold the latest for This seems like “Pick on Scale” Air is drawn through a vent on top 1979; the "Fang”, the “Humpty- month, but we might as well mention of the body, and is then blown out Jumpty”, and the "hip-hoo-REY”. another pet peeve that we’ve taken underneath to form a cushion of air Superior construction and out­ a whack at with a proposal. upon which the vehicle rides. It will standing performance are but two We’re sure Bud Nosen won’t stabilize itself about 3/4 of an inch of the features of this new line of mind our using one of his models as above the ground, and slowly move plastic keel-kites developed by Hi- an example, because it describes the forward. If it meets with an obstacle, Flier Manufacturing Co. situation so well. the Galax IV will bounce off, change The keel-kites combine long- At one of the last Glenview NAS direction, and continue on. lasting plastic bodies and wooa- Nationals, Bud entered and flew a The Galax IV is 16-1/2 inches long, dowel cross-sticks with exclusive beautifully detailed P-47 "Jug”. 8 inches wide, and over 4 inches Snap-Lok junctions on plastic wing We’re not sure how it placed now, as high. It is made of rugged poly­ sticks. They also feature tear-proof this goes back about 6 or 7 years, but propylene, and is impervious to all plastic grommets on larger keels, we certainly remember watching a fuels and solvents. and reinforcing safety tabs on the particular flight. It comes complete with engine, bodies. Bud’s P-47 was already in the air and an exclusive 5-minute instruc­ These are big kites; 48, 50, and 54 when we moved from the other line tional recording about starting and inches in span, beautifully printed at the two-line, back-to-back site. operating the engine. with imaginative designs that will Following a fine flying demonstra­ Sounds interesting! Wonder if it appeal to all. Some of tne kites have tion, Buagot into the traffic pattern, has enough payload for a radio? long plastic tails for more flying lowered flaps and landing gear, Also interesting, and also from action and in-flight stability. greased in on the spot, rolled to a Testors, are two new finishing kits Priced from $1.29 to $5.00, they stop, and then taxied back to the for plastic models. They are also of will be available at some hobby parking circle. As we watched from interest to builders of flying models, shops, and in many general mer­ nearby, the "Jug” rolled into the since so many of us use these ma- chandise stores. circle, braked to astop.and whaddya NOVEMBER 1978 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 141 both parts of the question is, “ As big as you want!” YES-SIR. ΥΕβ-βΙΒ. THREE BAGS FULLI ^ We have been copied in on many of John Worth’s answers to ques­ tions about insurance coverage and know the basic part of his answer by heart .. . "It’s not what you fly but how you fly, that governs the AM A insurance coverage.” And as for the FAA, there have never been any specified guide lines in existence, or WALT MOONEY NOW OFFERS 3 BAGS OF PEANUT SCALE PLANS in effect, that separate the "toys” ALL WELL TESTED DESIGNS, AT ONLY Í5.00 EACH from the man-carrying aircraft . . . EACH BAG FEATURES FOURTEEN PEANUT PLANS, but that's not to say we aren’t on the ONE OTHER, PLUS PHOTOS AND INFORMATION verge ot needing those guidelines . . . at least on our side of the separa­ SEND »1.00 FOR COMPLETE LISTING AND SAMPLE PLAN TO: tion. WALT MOONEY, 2912 CABRILLO MESA OR Model aircraft were in existance SAN DIEGO, CALIFORNIA 92123 and flying long before man suc­ ceeded with heavier-than-air flight . . . Icarus, with his "Feather and it was felt that trying to define the Wax Works Hang Glider Special", VINTAGE R-C PLANS line between those and models of didn’t do too well . . . and for the scale transport type aircraft with most part, models have always been small-windowed cabins, would get considerably smaller than the man­ too complicated. carrying kind. For this reason, even Incidentally, Col. BobThacker with the coming of World War II PIP ER J - 3 CUB-1/4 S C A L E was responsible for the insertion of target drones and then the RPV's, 9 FT. Wing Span — o is ig n io tt - s.c . s w c it z i· the word "human” in this proposal. the size of model aircraft has never ( id e a l f o r -QUADRA g a s e n g in e ) HAM LARMRCOWL POR OUAOftA IMAlNf He had dropped by theofficesnortly been a concern relative to common Plans : $ 13.95 PLANS-ADO $ ΙΛ Ο POSTAGE after we had mailed the proposal, use by the average modeler. . . until 3 SHEETS 3 6 X 7 2 * and was enthusiastically agreeable now. Plastic Cowl: $ 8.75 $ iso po stage with the idea. However, he felt that With the advent of large scale Edo floot plans: $ 4.00 * ,.00 po stag e dolls, dogs, cats, Snoopys, Flint- models, and it's inevitable now, with f l o a t s - 4 7 " long OEALERS WORLD WIDE stones, Yogi Bears (sniff), and the 1978 CATALOO 50{ several proposals for the 1980-81 OVER 50 PLANS WAMTEP like, were just not suitable. We had period already in the works for SID MORGAN to agree, and called AM A Head­ 13157 Ormond, Belleville. Mich, 48111 larger engines and larger aircraft, to- quarters to have the word "human” wit our own mammoth scale pro­ added to the specifications. In case posal, the time is ripe to consider know, the canopy slid open . . . but you're wondering, the proposal also no pilot got out or was even sitting in legal upper limits for model aircraft calls for a pilot tnat is to the same .. . before someone does it for us. the fully detailed cockpit! It was approximate scale as the aircraft, The point is this . . . although we will actually spooky! and its width must be in proportion Are you getting the message? undoubtedly end up with a set of to its profile, no silhouettes. Also, it’s competition rules for a category of Right! Like Herbert Hoover’s"chick- gotta be in the proper location. Not en in every pot”, we want a pilot in large model aircraft, starting January stuffed in with tne radio or fuel tank! 1,1980, we will still have, before and every cockpit! Before you get all Hope you agree with us on this excited ana knock over the dope proposal. after that date, larger heavier model bucket, listen up. aircraft that are still legal even What we want is a scale-size bust HOW BIG IS TO O BIG? though they exceed the proposed or full-figure human pilot aboard all With the rapid growth (no pun competition limits. canopied or open-cockpit aircraft intended) of both size and interest Wnat we need is a set of legal during the flying portion of com­ in R/C scale models (which we can limitations, which if exceeded, be­ petition (this means it doesn’t have take as much blame for as anyone), comes the sole responsibility of the to be there during static judging). If the most often pondered question owner of the “non-model. ’ As an the pilot happenstobeapermanent is, “ How big can they get and still be AMA illegal device, it would not be fixture, it is not to be judged, and it legal?” The word "legal” in this covered by AMA insurance, and in shall not in any way penalize the question is usually associated with fact if it left the ground, would be contestant's static score. Although two thoughts; insurance coverage under jurisdiction of the FAA. We pilots could also be required in and FAA limitations. At fhis point in must protect our right to determine models of many cabin-type aircraft, time, a perfectly accurate answer to our own rules, and the only way to do that is to establish and maintain them ourselves. UNITED STATES Our own suggestion is that we PATTERN JUDGES establish limits slightly above the ASSOCIATION proposed Mammoth Scale rules, Jo iff USPJA which call for a maximum weight of NAME 25 pounds, a maximum loading of 30 oz./sq. ft., and maximum engine ADDRESS displacement of 2 cu. in. (ignition) or 1.5 cu. in. (glow). Wing loading, CITY STATE ZIP incidentally, is based on a 15% Betty Stream, Sec/Treas., 3723 Snowden Ave., Long Beach, Calif. 90808 minimum airfoil thickness. For any­ thing thinner, the loading calcula- 142 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER CLASSIFIED ADS ADVERTISERS INDEX Non-commercial (personal Hems) Rale is 25 cents per word with a minimum ot S3 00 Commercial Rate is 40 cents per word, with a minimum ot $5 00 No mail-order discoum Ace R/C, Inc...... 111 house ads knowingly accepted No advertising agency discounts allowed Aircraft Model Products...... 115 All ads are payable with order, and may be lor any consecutive insertion period speeded Astro Flight. Inc...... 100, 101 Name and address free, phone number counts a$ two words Send ad and payment to Authorized Radio Control Service... 116 MODEL BUILDER Magazine. Classified Ads. 621 West 19th St Costa Mesa CA 92627 Badger Air-Brush Co...... 102 Barron’s Scale C lassics...... 136 Bavarian Precision Products Co...... 105 R/C systems and engines, old-timers, scale, NEW PEANUTS: Piper Super Cruiser, Bristol Cannon Electronics...... 106 gliders R/C Country, 610 E. Alosta, Glen­ M.1C, Fokker Triplane, Davis DA-2. SBD Carr S a ils ...... 138 dora. CA 91740 (213) 963-7310 Dauntless, OV-10 Bronco, $1 ea Stamp for Classic Era Model Plans...... 116 new Peanut/Grapenut catalog. Aero Era, Cloudbuster Venture...... 125 1930-1950 MODEL AIRPLANE KITS. Avi- 11333 N Lake Shore Dr.. Mequon. Wl 53092 Coverite...... 107 ation/Model Magazines wanted Many items Cox H obbies...... Cover 7 for trade. Jerry Antczak. 46064 Green Valley, OLD-TIMER REPLICAS Bombshell. Clipper. Jim Crocket R eplicas...... 141 Plymouth. Ml 48170 Ranger. Buccaneer, New Ruler. Playboy, DaCa Model Products...... 140 Mercury, others Catalog 25C Micro Models. Davis Diesel Development...... 139 VINTAGE Ignition and Glow Engines. Back- Box 1273B, Covina. CA 91722. deBolt Radio Control ...... 135 issue magazines; MAN. AT, FA, etc. 25C and Du-Bro Products Inc...... 108 SASE for list. F.V Hansen. 3118 Fairway F1A, F1B. F1C. Coupe. Unlimited. Old- FAI Model Supply...... 134 Drive, Las Cruces, NM 88001. Timers. Indoors. Peanuts, best FAI rubber accessories Send 25Φ or S A S E for catalog Fli S h irts ...... 126 FF/UC SCALE PLANS Peanuts. Walnuts. Che Hobbies F/F Specialists. 10900 East- Flying Scale Models ...... 132 Flyline Models...... 106 Hazelnuts. Rubber. CO2 , Gas Modernis­ wood Ave . Inglewood. CA 90304 tic Models P O. Box 6974, Albuquerque, NM Fox Manufacturing Co...... 130 87197 Futaba Industries. USA...... Cover 5 WANTED Old-Time spark-ignition model Carl Goldberg Models...... Cover 3 airplane motors, magazines and gas powered PRO SHOP For The Sporl Flyer, also quarter race cars of the 1930's and 1940's Russell Hi-Flier Mfg. Co...... 73 scale models. Charge cards accepted King Stokes. Rt 1. Box 73J, Keller. TX 76248 Hobbypoxy Products...... 114 R.C., P.0 Box 897, King. NC 27021: 919- HRE. Inc...... 131 983-5660 FOR SALE Morton 5-cylinder model airplane Idea Development, Inc...... 109 engine factory engineering drawings. 1944 International Modeler S h o w ...... 123 AERO HOBBIES: Rubber and CO2 spe­ series. 48 pages, full size, including operating Jomac Products, Inc...... 119 cialists. Kits, rubber, accessories from Peck. instructions, wiring diagrams, carburetion J & Z Products...... 120 Vintage Aero, R/N, Classic, Moorehouse. adjustment, prop removal and general tuning K & B Mfg. Co...... 99 Micro-X. SIG, Lee's. Keil Kraft. Flyline and hints. $8.00 complete in plastic binder plus Kraft Systems, Inc...... 1 others. Catalog 50C. Send to: Aero Hobbies, $1 00 postage, first class Mark Wallach. 220 Kustom Kraftsmanship...... 118 Box 115, East Glastonbury, CT 06025 East 63rd St.. New York. NY 10021 Larry's Hobby S upply...... 112 Majestic M odels...... 128 Mark's M odels...... 113 Jim Messer's Quality Model Products...... 113 MOVING? SEND NOTIFICATION FIRST! Micro-X Models...... 127 Midwest Model S upply...... 115 ^Attach old label here N Attach old label here I Model & Allied Publications Ltd...... 141 NAME J I Model Builder Binders...... 135 OLD Model Builder Products___133, Cover 4 ADDRESS ADDRESS Model M erchant...... 127 Model Rectifier Corp. (MRC) Cover 2 & 8 (Please Print) CITY \ STATE ZIP I Walt Mooney Peanuts...... 142 Sid Morgan Vintage Plans...... 142 Attach old label here / ~ Attach old label here Novak Electronics ...... 2 Octura Models...... 137 NEW NAME Orange Coast Hobbies...... 3 ADDRESS Pacer Technology & Resources...... 117 ADDRESS PanaVise...... 121 (Please Print) Peck Polymers...... 141 CITY STATE ZIP Perry Aeromotive, Inc...... 115 Change of address notices must be received one month before date of issue that new Pierce Aero Co...... 110 address takes effect. For prompt service, old label MUST be attached. Post office will Pipeline...... 136 not forward copies unless you pay extra postage. Duplicate iaues cannot be sent. John Pond O.T. Plans Service...... 140 Probar D esign...... 138 MODEL BUILDER, 621 West Nineteenth St.. Costa Mesa. Ca. 92627 Proctor Enterprises...... 112 Radio Control Buyer's G u id e ...... 124 Repla-Tech International. Inc...... 104 Satellite C ity...... 125 tion is penalized by deducting wing the Masters class, has been adminis­ Schluter Products...... 129 area equal to double the the per­ tered by various portions of the rule Sig Manufacturing Co...... Cover 6 centage under 15%, if, given a 2000 book . . . some AMA and some FAI Sterling Models, Inc...... 72 sq. in. wing averaging 11% thick, . . . a continually confusing situation Su-Pr-Line ...... 128 deduct 2000 x (.04 x 2)% = 1840 sq. in. which has resulted in numerous Tatone Products Corp...... 122 We’d like to hear your ideas on hassles during the heat of competi­ Telco ...... 104 this matter. It’s important, and Vintage A e ro ...... 134 tion. The confusion is a result of VL Products...... 134 something has to be done about it conflicts between certain portions Vortex Model Engineering...... 139 soon. of the “ground rules” more than in Williams Bros, Inc...... 103 FAAMAI? the actual flying of maneuvers. Windspiel M odels...... 118 Perhaps that is how you might Differences occur in engine starting combine FAI and AMA. Our fourth time, definitions of attempts, num­ oroposal is a little more involved, ber of attempts, definition of official MODELS out the idea is the same. flights, limitations to the use of two For several years now, pattern aircraft, etc. BUILDER competition in the USA, particularly In our proposal, we have taken NOVEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 143 FULL SIZE PLANS SERVICE No. 878-0.T. .020 RECORD HOUND $2.50 No. 34781 TORC TRAINER $6.00 Inducting reprint of construction artide Classic Henry Struck design. Could dom­ R/C trainer combined with the nostalgia inate .020 Replica class. Dave Sweeney. (if any) of old timers. Span 7 6 '. George Clapp. No. 7781 " L IL Q U IC KIE" $5.00 R/C Form I model of George Owl's best. No. 34782 LATHROP TRACTOR $2.00 No. 11781 T R A V E L AIR D4D $7.50 All wood construction. By Hal deBolt. A stick fuselage rubber design out of the Accurate 2-inch R/C scale model of fam­ 1914 model building era. By Dave Stott. ous Golden Era biplane. By Bill Seidler. No. 7782 '30's SPO RTSTER $3.00 Small R/C parasol for ,020and mini-mul- No. 34783 WINGS $2.00 No. 11782 PAZMAN Y P L-4A $4.00 tior pulse rudder. Span 29". Tom Houle. An .020 powered biplane canard sport Jumbo rubber scale model of VW power­ model. Stick fuselage. By Randy Wrisley. ed homebuilt, 56" span. Leon Bennett. No. 7783 GREAT SPECKLED BIRD $2.50 Unlimited rubber ship which won Mulvi- hill trophy at '77 Nats. George Perryman. STIC K 'EM PA TTERN S Complete sets of pressure sensitive pattern! No. 10781 G U SSETS $5.00 No. 7784 " S IC K LE " $2.00 provide "printed wood". . . on your stock . . Sporty, mid-wing, aerobatic "could-be" FA I Combat ship with interesting mass for selected M ODEL 8 U ILD E R plans. Press R/C scale, for .29 - .35's. Brad Shepherd. production innovations. By Steve Fauble. all patterns for ribs, bulkheads, tips. etc., on proper thickness sheet balsa or plywood, No. 10782 AFTERNOON DE LITE $3.00 No. 778-O.T. CURTISS ROBIN $5.00 and cut 'em out! No tracing, no transferring, Compact 54" span, highly maneuverable A 1937 Sport Scale ship! From Comet no plans tearing, no inaccuracies. Just like V-tail R/C slope soarer. Randy Wrisley. kit, 72" span. Designed by Joe Konefes. making up your own kit with printed wood. "Stick 'em Pattern" numbers correspond to No. 10783 A TA V IST $3.00 No. 6781 LO C K H EED P-38L $10.00 plan numbers. Order with plans and they'll Quickly built, highly competitive, half-A R/C Sport Scale, balsa and ply const., a be mailed together . . 3rd Class. Add 654 free flight, 252 sq. in. Bill Langenberg. trophy winner, big, 8' span. Art Johnson. per set to mail patterns 1st Class. No. 1078-O.T. TLU SH 'S IN SPRER $4.50 No. 6782 PASKEY $4.00 CALIFORNIA RESIDENTS ADD 6% TAX. Modern construction featured in this '37 Low-wing, trike, sport/pattern for advan­ cabin ship, 78" span. By Francis Tlush. ced flier, 42" span, .19. Randy Randolph. No. 12711SP CURTISS-WRIGHT Jr. $3.95 No. 11731SP BIG JOHN the FIRST $5.95 No. 9781 GREAT LAKES TRAINER $4.00 No. 6783 R/C SA ILIN G K ET C H $10.00 No. 574-O.T.SP T-O COUPE $2.95 Sport scale biplane for 3-4 channels and Complete plans (4 sheets) for building an No. 674-O.T.SP RED ZE P H Y R $3.95 .19 engines, 40" span. By Bill Northrop. elect, aux. powered ketch. WaltMusciano. No. 6741SP T R IX T E R BEAM $2.95 No. 774-O.T.SP OUT Ό SIG H T $2.45 No. 9782 "LIVE WIRE” TRAINER $4.00 No. 6784 BUSY B $1.50 No. 7741SP C U R TISS A/12 S H R IK E $3.95 Famous R/C Aircraft Series, No. 2. First Very thorough instructions go with plans No. 874-O.T.SP POWERHOUSE $3.95 kit ever for R/C modeling. Hal deBolt. for this competitive EZ-B. Ron Roberti. No. 91074-O.T.SP BUHL PUP $4.95 No. 1174-O.T. SP LAN ZO S T IC K $1.95 No. 9783 R/C STEAM LAUNCH $5.50 No. 678-O.T. MISS DELAWARE $4.00 No. 11743 SP"C-OUELL" $3.95 Natural finish mahogany planked 40" OA Steve Kowalik's 1937 Junior Motors Con­ No. 575-O.T. SP M ER CU R Y $3.95 "African Queen" type. Kilburn Adams. sistency winner. Easy to build, 7' span. No. 775-0.T. SP BO M BSH ELL $3.25 No. 277-O.T. SP B E R LIN E R JO Y C E $5.25 No. 9784 COBRA/KINGFISHER C/L $1.50 No. 5781 UPTON'S B A B Y A CE $10.00 No. 3771 SP WACO UPF-7 $5.50 Whip and 1 /2A powered 2-for-1 project, No. 4771 SP "MISS ARPIEM" $3.25 great for young beginner. Dave Kingman. Exact R/C quarter-scale model of popular homebuilt parasol, 78" span. Bob Upton. No. 577-O.T. SP GLADIATOR $4.75 No. 6771 SP G IP SY MOTH $6.95 No. 8781 R/C V E LIE MONOCOUPE $8.00 No. 5782 MERLIN $3.00 No. 7771-SP OS2U KINGFISHER $5.95 Light-weight 1 /4-scale for belt reduction electric power. 90” span. Bob Boucher. Single or mini-multi R/C aerobatic slope Price includes 3rd Class postage and reprint soarer. Ace foam wing. By Kevin Flynn. of building instructions (if any). Add 654 PER PLAN for 1st Class postage. Add 504 No. 8782 VEST POCKET SE5A $2.50 No. 5783 RUDDER BUG $5.00 For pulse rudder R/C, this 22" span bug PER PLAN for overseas orders (except APO uses Cox .020 Pee Wee. By Fred Angel. First in Famous R/C Aircraft series. Orig­ and FPO). Complete plans list 354. inal 6 span version. Good and Northrop. CALIFORNIA RESIDENTS ADD 8% TAX No. 8783 "PHOENIX" C/L STUNT $3.00 Sharp looking profile C /L stunt ship for No. 5784 SAMURAI $2.50 MODEL BUILDER PLANS SERVICE .29 to .36 engines. By Mike Parenteau. Latest FA I C/L Combat "weapon", des­ 621 WEST NINETEENTH ST. igned by top competitor. Rich Lopez. COSTA MESA, CALIFORNIA 92627 the FAI rules as the backbone of the complish it, and also as usual, the event, and added to it, all of the Workbench . . . Continued from page 6 same few “do-ers” will handle the AMA rules that do not conflict with job. the FAI rules. This provides us with about 50 cars and the transmitter- INDOOR WORLD CHAMPS one complete set of pattern rules impound rack is topped by a wind­ Just received a phone call from which includes all of the best and sock. Future plans may include a Jim Mosely, of England, who will be necessary parts of both AM A and field house. giving us photos and text on the FAI, yet there is no confusion or “The WRAMs welcome specta­ recently concluded Indoor World conflict. The rules are basically FAI, tors. Field hours are 9 a.m. to dusk Championships. A brief run-down as used all over the world, but on weekdays, and 11 a.m. to dusk on of the results are as follows: include the AMA skill classification weekends and holidays. Patterson is 1. Jim Richmond (USA)...... 8442 divisions and lists of maneuvers. If located in the northwest corner of 2. Bud Romak (USA)...... 8122 you’re interested in pattern com­ Putnam County.’’ 3. Ron Hicks (CAN)...... 7629 petition, watch for this proposal Read Hal deBolt’s R/C Forum in 4. Laurie Barr (C.B.)...... 7357 when it's published in M o del this issue for some good ideas on Team Placings: Aviation, and let us have your obtaining the use of a suitable flying 1. Great Britain...... 21802 comments. · field. As usual, no one is gong to 2. United States...... 21429 come to your club and beg you to 3. Canada...... 21252 use their site. It takes a certain 4. Japan ...... 21038 amount of leg and mouthwork on 5. P o la n d ...... 20521 the part of club members to ac­ 144 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER in helicopter competition, and that's exactly what Johns Futaba delivered. And with John at the sticks, spectators and the opposi­ tion alike were treated to the first perfect loop performed by a scale chopper. Futaba systems are recommended by American R/C Helicopters for optimum control and reliability. John Simone, Jr., 1977 AM A National/ Expert Champ. Check out the system that Performing against gave John the edge, Futaba Experts at the AMA Heli­ can make you a winner, too. copter Nats leaves no margin for error. That's why John A. Simone of Mission Viejo, California, chose the Futaba FP-5FN system to pilot his Rev-olution II to victory. Futaba Precise control and excep­ Futaba Industries. U.S.A. The Simone Rev-olution. Power hy K&B. 630 W. Carob Street tional reliability are essential Radio by Futaba. Compton. CA/90220 John Simone, Jr. National Helicopter Champion. SIG KITS AROUND THE WORLD

Upper Left: Dennis Green (Tompson Station, TN) and his father learned to fly 3 years ago with a Sig Kadet. Since then they have built the J-3 Cub, Kommander, Liberty Sport, and now the Smith Miniplane. Upper Right: This beautiful Kougar was built by Jerry Morgan (Apollo, PA) and carries scratch-built rockets and landing gear details. Left: Art Topa (West Palm Beach, FL) created this artistic red and yellow paint scheme for his Sig Kommander. Art said in his letter; ‘1 am a member of the Skyhawks, a Florida club that has many members who owe their flying skill to your fine product. Most of us started with the Sig Kadet and went on to the Kommander and are proceeding up the Sig ladder.” The steps in learning to fly RC the Sig way are to start out with the Kadet (a 3 channel high wing trainer); progress to the Kommander or the new Kavalier (shoulder wing aileron trainers); then go to the Kougar (a midsize stable low wing). After the Kougar, designs like the J-3 Cub, Smith Mini­ plane, Komet, P-51, etc. are easy to fly. Lower Left: This Kougar built by Howard Kofoed (Omaha, NB) sports a racy yellow (on wing leading edges, fuse top, tail surfaces) and white paint scheme with black pin stripes. Bottom Left: Finn Johansen (Norway) is a Sig Skybolt fan having built and flown two. He says that he was surprised at how well the Skybolt performs in the air, and that it is obedient and easy to handle. "There is not a thing you cannot do with a bipe like this.” His Skybolt has been flown in many shows and on a TV program in Norway. Finn also informed us in his letter; "Sig kits have become very popular in our country. I have test flown your Cub J-3, Zlin, Ryan STA, Kougar, Kadet, Kommander, and Komet, and all of them were excellent planes.” Bottom Right: A standard 3-channel Kadet flown by Marv Goldberg (Omaha, NB) is coming in on final approach for landing. RC-38 SMITH MINIPLANE - .40 - .45Engines ...... 849.95 RC-35 KOUGAR - .40 - .45 Engines ...... 844.95 RC-32 KOMMANDER - .40 - .50 Engines ...... 839.95 RC-34 SKYBOLT - .60 Engines ...... 862.50 RC-31 KADET - .19 - .35 Engines ...... 834.95

See your dealer first! To order direct, add $1 postage under $10, postage free over $10. No C.O.D. PLACE YOUR ORDER NOW FOR SIG’S LATEST COMPLETE CATALOG - NO. 39 - $2.00 PPD. SIG MANUFACTURING CO., INC... Montezuma, Iowa 50171 ř*

NEW! 8044 FOUR WAYS TO IMPROVE A CHAMPION. Cox/Sanwa's 8040 radio system helped Skip Miller become the 1977 World R/C Soaring Champion. And now, one of four advanced versions of the 8040 can help make you number one. Whether you're flying for sport or competition. Want reliability and performance at a reasonable cost? Then you want our new 8044 or 8054 system, available on all 72 MHz frequencies.The 8044 is four- channel. The 8054 has a fifth channel with toggle switch to retract landing gear. Both inherit all the 8040's outstanding features while adding innovations of their own. Such as totally new miniature servos for easy installation in smaller models. These have everything you want in a se rvo - plus 60% moi;e power than micro-servos offer! 8054

8048

Two more successors to the 8040 bring a new dimen­ sion to competitive flying. And if these new 8048 and 8068 systems look distinctive, wait till you see their features. Including the low-force open gimbal sticks with a unique dirt-resistant design. Variable rate adjustment on aileron and elevator channels. Adjustable stick lengths to suit your own style. And you get new miniature ball bearing servos— with a ball bearing output shaft plus an isolated, long­ life potentiometer and waterproof case. There's even a modular gear train for easy servicing. The 8048 provides four channels. The 8068 adds a proportional fifth channel, and sixth channel with toggle switch. Both are available on all 72 MHz frequencies. All four systems feature the quality, engineering, craftmanship, and affordable pricing that's made Cox/Sanwa famous. Behind each one stands a world champion. Pick the one that'll win for you. All systems include transmitter, four miniature servos, receiver, dual charger, servo trays and accessories.

Cox/Sanwa Radios, Airtronic Kits, Cox Engines. Cox Hobbies. Inc. A Subsidiary of Leisure Dynamics, Inc. 1505 East Warner Avenue, Santa Ana. CA 92702 SOMEDAY ALL R/C CARS WILL BE MADE THIS GOOD

MRC-TAMIYA PORSCHE TURBO 935 RADIO CONTROL CAR KIT WITH ADJUSTABLE GEAR RATIOS FOR THE TIGHT TURNS OF IN-HOUSE MANEUVERING AS WELL AS THE FREEDOM OF OUTDOOR RUNNING MRC-Tamiya’s Porsche Turbo is what put electric motor put power and re­ verse speeds. Select the gear ratio R/C electric cars are all about. If sponsiveness in tight harmony. you need, choose from 4.7 to 1 (fast); you're a hobbyist you'll appreciate the AN INSIDE TRACK FOR 5.8 to 1; 15.5 to 1; or 19.4 to 1 (slow). difference between this precisely en­ ENJOYMENT Then, depending on what you’ve gineered road car and so many of the And while a lot of electric R/C cars chosen, you’ll have the speed ratio to toy R/C kits now on the market. can run in a gymnasium, or open run full out and still be compatible First, there’s the satisfaction you’ll get area, how many of them also offer with any course .. . indoors or out. when you assemble this 1/12th scale versatility (in the form of special ad­ It's this kind of advanced engineering reproduction of the Turbo Charger justable gear ratios) to let you con­ that lets you get the most out of your Porsche 935 that won the 1976 and tinue your hobby in your house? With R/C car hobby. Someday they'll all be 1977 Maker's World Championships. this MRC-Tamiya Porsche Turbo 935 made this well.. . until then, see your From decal detailing to airfoil con­ you have two forward and two re­ hobby dealer for the MRC-Tamiya struction, the Porsche is the spitting R/C Porsche Turbo 935. image of the 590 hp champion. And Accommodates dry cells or rechargeable nickel cad­ mium batteries MRC two channel 772 series radio when MRC puts its well earned repu­ recommended, although any comparable two channel tation for R/C electronics, together radio is sufficient Radio and batteries not included with Tamiya’s know-how for produc­ ing precision kits, the result is a new plateau in hobby performance. ★ ★ Operating rear suspension works in ΤΑΜΓΥΑ tandem with rear end operating dif­ ferential for sure and steady handling MODEL RECTIFIER CORPORATION 2500 Woodbndge Avenue. Edison. N.J 08817 in corners. A finely honed propor­ In Canada: 3440 Pharmacy Avenue, tional steering system and a big out­ Scarborough. Ontario. Canada M1W2P8

adjustable gears allow you to choose ratio (there are four) best for the course, indoors or out.