QUALITY PLUS PERFORMANCE KITS AND ACCESSORY ITEMS FOR THE DISCERNING MODELER Two Top Performing Sport Power Ships From The Pages Of RCM Designed By Don Dewey & Lee Renaud

PLUS SERIES KITS FOR LOW COST AND HIGH VALUE These kits include the same quality precision machined parts UARE SOAR Í in our other kits. Very simple to build and easy to fly. Requires some minor cutting and pushrod hardware. Coming Soon Gere Sport: 36” Span 250 Sq. In. 16-20 oz. .15 Sport Scale Bipe 72” Span 500 Sq. In. 22-25 oz. THE MOST COMPLETE LINE OF R/C SAILPLANES & ACCESSORIES AVAILABLE QUE5TOR SUPER QUESTOR

The Hi Performance Compacts'

16-20 oz. ^ . LAUNCH PAIL OLYMPIC 99 HIGH STARTS The Trainer With A Contest Record' Com plete with 100 vy length ° f surgical tubing. monofilament line 99” Span and all hardware. 790 Sq. In. Standard $34.95 40-44 oz. Heavy Duty $36.95 Full Line Of Towhooks, Chutes, Canopies, etc. AQUILA Both Kits Include Optional Spoilers “ Proven Performance GRAND For The Competition Flier’ ESPRIT ______

134” Span For Additional Info Write 1100 Sq. In Γ AIRTR0NICS 64-70 oz. I P.O. Box 626, Arcadia, Cal. 91106 Calif. Residents Add 6% Sales Tax or Call (213) 445-4600 Dealer & Distributor Inquiries Welcome RC MODEL SAILBOAT RACING... A PopularNew Sport When you get involved, involve yourself with the largest class. The Dumas 45" Star This inexpensive model is easy to build,v a delight to sail. . . and there are more of them around the country than any other class. The Dumas 45" Star is a recognized racing class of the American Model Yachting Association (AMYA) which sanctions regional and national championship races for the class. See the complete line of Dumas spilboat, powerboat, and scale model kits at your dealer's or send 50® for our complete catalog.

fo r fu n sailing

3 0 "STAR (KIT RS-30) ► A smaller version of the popular 45” model. Has mahogany plywood frames, planking and deck of 1/12" mahogany. 8uilt-up spruce mast 44" high, ready made sails. (Ballast and radio not in­ cluded.) Can be sailed with 2 channel radio to control rudder and trim sails (jib and main together) using sail trimming mechanism (Kit RS-30-2)

45" STAR (KIT RS-45) A 45" long, 12" beam beauty with birch plywood hull and mahogany deck. Includes built-up 66” spruce mast, brass turnbuckles, chain plates and ready-made sails. (Ballast and radio not included) Sail trimming mechanism (Kit RS-45-1) For controlling sails independently. Lead screws with two Dumas/Pittman motors. Single motor sail trimming of main and jib together, Kit RS-45-2

a ACE RACING SLOOP a ALCORTSUNFISH 19" LIGHTNING (KIT RS-17) (KIT RS-20) (KIT RS 219) dumas An all-time favorite for free A scale model of one of the most A Γ — Γ scale model of the sailing. 17" model - mahogany popular small sailboats. Just 20" long long-popular Lightning class sail­ hull with die-cut parts, stream­ with 6" beam, she has an all-mahogany boat. Plywood frames and mahog­ lined keel 21" birch mast. Includes hull, ready made sails with authentic any planking. This kit is easy to boats sails, all necessary rigging and red and white stripes and weighted build and makes an excellent Dumas Products, Inc. fittings. daggerboard for sailing. model for display or free sailing. 790 South Park Avenue Tucson, Arizona 85719 CARL GOLDBERG CG QUALITY ACCESSORIES Did you read the story in R/C Modeler (Aug. 1975) about Bob & Doris Rich? These great folks -modelers both-travel the country for us visiting model flying fields, clubs,hobby shops, etc. Among other tasks, Bob and Doris tell us what they find modelers are looking for. Here are the latest results. Try ’em - and tell us what you’d like to see!

This simple Strip Aileron Horn Set STRIP AILERON HORN SET provides easy adjustment of throw, and long reach torque rods. Can be used with Carl Goldberg Aileron Pushrods. SAH-332 98*

K'«* For large models, long 5/32" music wire strut and adjustable axle. Com­ plete with blind nuts, screws, etc. SNA-532 $3.29

Λ For medium-size models, 1/8" music wire strut with fixed axle. Now you can stop drilling out your aileron servo output arms - Complete with blind nuts, screws, AILERON PUSHRODS these Aileron Pushrods are 1/16" wire! Modelers say this prod­ etc. SN-180 $2.50 uct has really been needed a long time. Two of our patented f/16'WIRE! Snap Links and two 7" rods, API 75* • Steering Arm alone, SA-180 75* J • Nosegear Bearing, blind nuts and ^ screws. NB-180 75*

FREQUENCY FLAGS

NYLON ANTENNA TRUE COLORS! SNAP LINK

QUALITY SHROD CONNECTORS NON-THREADED MATERIALS! SOLDER-E-Z LINKS.

■ © 1 Once again, a CG accessory turns a tough, irritating job into o breeze! Our new Pushrod Con­ At last, really effective and beautiful fre­ nector requires NO SOLDER­ quency flags! Your choice of 7 popular color ING or PEENINGI Tough Ny­ combinations. Nylon clips are joined with lon Snap Nut snaps easily over fine grooves, vet requires a knife Solder-E-Z Links are tin-plated for full-swivelling ball chain for free action. blade to pry it o ff. Can be re­ Antenna clip allows full collapse of thin final used over and over. soldering. A nice improvement · and note the antenna segment to prevent damage. FF1 98* P C I. 2 sets 98* price is easier on you. too! EZ3, 2 for 59*

LANDING GEAR ■ WHEEL RETAINING SHEET METAL SCREWS ^ ^ W T R A P S SPRINGS LONGER SIZES #2 X 1/2" #4 X 1/2" Sharp, dean, full-depth threads, hard and strong. Excellent for mounting servos, etc. Includes washers- # 2 x 1/2'* SMS2-50.35* for 10; * 4 x l/2 " SMS4 50,35* for 8.

For best service, see your dealer for items you went. WHEEL If not evailab/e. write direct: add SOd par Ham RETAINING SPRING IS1 outside U.S.). Minimum ordar $1. 3/8” Ä1/2" WING TWO SIZES - 1/16” A 3/32" SKID "“•""""“—“""I TWO SIZES Carl Goldberg Models Inc. For many smaller modelsand tail-wheels, These tough Nylon Straps provide strong etc., these special springs do a good job Even top flyers can't keep gusty winds 4736 W. Chicago Ave., Chicago. II 60651 ■ and electrically noiseless strut retention. of holding the wheels on. 2 sizes avail­ from dropping a wing tip to the runway I am sending 25c for 8 pg illustrated 2 sizes available. 4 Straps, 8 screws. able. 6 Springs. 6 washers. WRS-116 and while landing. CG Nylon Wing Skids help Catalog with Basic Explanation of R/C LGS 38 and LGS-50. 50* a set WRS-332. 39* a set prevent ugly scrapes. WS1, 3 for 50* Equipment and RadioControl Definitions ■

M ANUFACTURERS-All our accessories are available at excellent O E M bulk prices. A ll ITEMS AVAILABLE IN CANADA Address______J CARL GOLDBERG MODELS INC. Cdy.______J State.Zip------4736 WEST CHICAGO AVE · CHICAGO, ILLINOIS 60651 DECEMBER 1975 1 MODELS .. ° 'Δ ΔUSE BUILDER presents the MASTER MODEL BUILDER Send all entries to: of the month MODEL BUILDER/PANA-VISE CONTEST 1105 Spurgeon St., Box 4336, CONTEST Santa Ana, California 92702 COLBERT INDUSTRIES, manufacturers of PANA-VISE, the unique hobby vise which turns and tilts to any position, in conjunction with MODEL BUILDER magazine, is sponsor­ ing a design competition for MODEL BUILDER readers. This monthly contest will be judged for originality and/or craftsmanship for all types of models (excluding plastic static scale). Entries will be judged purely on the basis of photo­ graphs and drawings supplied by the builder of the model. Emphasis in judging will be on originality, technical achievement, and craftsmanship, as found in the submitted material. A MODEL 301 PANA-VISE WILL BE AWARDED EACH MONTH TO THE WINNING ENTRY

3. If photos cannot offer sufficient information about the model, the construction drawings may also be submitted. Drawings should be dean, pencil draw­ ings with all pertinent dimensions indicated. A p rin t o f the drawing is acceptable. 4. A written description should be included with photos and drawings, explaining in fair detail any unusual features o f the design, and explaining any unique technical difficulties that the model may have achieved. 5. Please do not submit any designs that have been accepted for use in another publication. MOD­ EL BUILDER requests first option on publishing any submitted design. Payment fo r published designs w ill be at our regular rates. A ny prizes awarded do not represent an agreement to publish any design. 6. Entries w ill be judged by the modelers on Requirements for entries: MODEL BUILDER'S editorial and art staff, and all 1. Any type model may be entered (aircraft, cars, decisions o f the judges w ill be final. boats, etc.). Kits may be entered if significant modi­ 7. Postage must be furnished if return of sub­ fications have been made to the stock kit. m itted entries is desired. 2. Do not send the actual model. Send only black 8. Deadline for entries in the first contest of the and white photos, showing at least three views o f series is July 1, 1975, and winners w ill be announced the model. Include some familiar object in at least in the September 1975 issue. Subsequent entries w ill one photo to indicate the size o f the model. Try to be due the first o f each month and winners w ill be include photos o f any significant details. announced the second month following each dosing. This month’s winner is ALAN FRIEDMAN, Reston, Virginia. His entry is a Veco .19 powered, R/C "Stand-Off” 1/8 scale model of the 1972 Tyrell Formula I car driven by the late Francois Cevert in the 1972 French Grand Prix. Scratch-building o f the car took 10 months. The chassis is aluminum monocoque construction, using .040” aluminum sheet for outer skin and bulkheads, all joined with rivets. Central monocoque “ tub," or box, houses the receiver and servos, which are accessible through a bottom cover plate. Front suspension is scratch-built, with Delta servo-saver. Drive train is scratch-built, with lay-down engine, Delta clutch/flywheel, original belt drive, tank, and exhaust system. "Cold Air Box” is sheet aluminum, with hardwood intake scoop. Wheels and tires are MRP. Radio is Kraft. Finish is Hobbypoxy over special aluminum primer. Total weight is just 4 ou.nces over R.O.A.R. minimum of 5 pounds.

2 MODEL BUILDER DECEMBER

M O D E L 0 1975

BUILDER volume 5, number 48

1105 SPURGEON, BOX 4336, SANTA ANA, CALIFORNIA 92702 (714) 547-3963

STAFF CONTENTS

EDITOR FEATURES Wm. C. Northrop, )r. WORKBENCH, B ill N o rth ro p ...... 4 GENERAL MANAGER Anita Northrop OVER THE COUNTER, Bill Northrop ...... 5 EDITORIAL ASSISTANT COVERING WITH METAL FOIL, by Art H all...... 11 Le Gray ASST. GEN. MANAGER REMOTELY SPEAKING, B ill N o r th r o p ...... 13 Dawn Garrott CHOPPER CHATTER, John T u c k e r...... 18 ART DIRECTOR Paul Plecan PLUG SPARKS, John P o n d ...... 22

SECRETARY R/C SOARING, Taylor C o llin s ...... 26 L. Gordon R/C AUTO NEWS, Chuck H a llu m ...... 28 SUBSCRIPTION MANAGER A. Valcarsel STRICTLY SAIL, Rod C a rr...... 30

CONTRIBUTORS CONTROL LINE, Dan Rutherford ...... 36 Rod Carr TETHERED CARS, Ted M a c ia g ...... 38

Chuck Hallum F/F SCALE, Fernando R a m o s ...... 40 Bill Hannan HANNAN’S HANGAR, B ill H a n n a n ...... 42 Walt Mooney john Pond FREE FLIGHT, Bob S ta lic k ...... 46

Fernando Ramos 1976 WORLD F/F CHAMPIONSHIPS, Don Chancey ...... 50 Dan Rutherford Bob Stalick SCALE VIEWS |ohn Tucker AERO A .100, Letectví & K o s m o n a u tik a ...... 17

ADVERTISING REPRESENTATIVES WEST: Bob Upton, 20626 Clarendon Ave. CONSTRUCTION Woodland Hills, California 91364 (213) 884-2294 CLIPPER AMERICANUS, A rt H a ll...... 8 EAST: Walt Moucha, 38 Coppersmith Rd., Levittown, New York 11 756 SHERESHAW’S '‘PIONEER" O.T., Phil Bernhardt...... 24 (516) 796-4898 2-IN-1 FOUND SEAPLANE, Walt Mooney ...... 32 Subscriptions SI 2.50 per year, S23.00 for two years. Single copies $1.25. Add S2.00 PEANUT ROLAND D-XVI, Ed H e y n ...... 43 for postage per year outside of U.S. (Except APO). Add 75 cents for Canada and Mexico. STEPHANIE’S "SOLIDIFIER’’ A/1, George P e rry m a n ...... 53 Copyright 1975 The MODEL BUILDER. A ll rights reserved. Reproduction without permission prohibited. Published monthly by MODEL BUILDER Magazine, 1105 Spurgeon, Box 4336, Santa Ana. Calif. 92702. Phone (714) 547-3963. Cover: This photo was taken moments after the couple in the picture, Bob and Doris Change of address notices must be received Rich, had completed the first ever transcontinental U.S.A. flight of a radio controlled one month before date of issue that new model aircraft. The gentleman looking up from lower right is a man who has been address takes effect. Send old address with making model airplane history nearly all of his life . . . Carl Goldberg, manufacturer of new; old label preferred. Post Office w ill not the Senior Falcon kit from which the record-setting aircraft, "Liberty Bell," was built. forward copies unless you pay extra postage. For a more complete story on this flight, turn to page 4. Kodachrome by Bill Northrop. Duplicate issues cannot be sent. Second Class postage paid at Santa Ana. Ca.

DECEMBER 1975 3 We'll have to forgo the annual Christmas greeting from MODEL BUILDER'S "homebuilt scale model." She's too busy getting to know all about model "yairpanes." This photo was taken recently, at Mile Square, Fountain Valley, California. Belinda's flipping the prop on Jim Scarborough's original design Clipper Cargo model. Jim didn't mind at all . . . he wasn't there! f r o m B i l l Northrop'* w o r k b e n c h . · ·

• This month’s cover story is sorta have to contend with. a public relations mind with the talents super-colossal extra special. The co-stars, Then, if you manage to get yourself o f AMA's Larry Bolich. About 6 hours Bob and Doris Rich, are shown only ... and your airplane ... to your desti­ after you’ve disclosed your intentions, moments after having completed an epic nation in one piece, just imagine repeat­ he calls you on the phone and says, event in the history of model aviation. ing that stunt 120 times in succession, “ Guess what, pal? I’ve arranged for the They flew a radio controlled model air­ within a period o f 29 days, in totally State Highway Patrol to give you an craft, named the "Liberty Bell” in re­ strange territory, through sun, wind, rain, escort to the field. They'll be at your cognition of our 1976 Bicentennial, and whatever else is available along that house Saturday morning at 8:30 am. On across the country, from the Atlantic 300 mile trip. the way through town, you’ll circle the Ocean, at K itty Hawk, North Carolina, If you get this much o f the picture, elementary school and do a touch-and-go to the Pacific Ocean, at Oceanside, Cali­ you've still only got about one-tenth of on the playground. The school board fornia. Obviously not a non-stop effort, it. Add to the above; landings in the and PTA w ill be on hand and expect the trans-continental flight consisted of most inopportune places. . . like on the you about 9:15. Five minutes later, 120 short hops over a period of 29 days highway in front o f you because the you’ll land in the city park across from (one less than predicted), and covered engine cut prematurely and there’s no­ the Post Office, where you can refuel 3,027 miles. thing but trees on both sides o f the while the City Manager gives you an Three thousand miles? Yes. If you road, or like in the big city parking lots, airmail letter to deliver to the Mayor, take the southern highway route across as arranged by well-meaning non-mod­ who along with some visiting dignitaries the United States, you’ll find that you elers, who don’t realize that light poles from the state capital, is going to be at drive through 10 states and more than and power lines are not kind to model the field awaiting your arrival. You a score (that’s about one-twelfth of a aircraft. weren’t kidding when you said you were gross) of major cities. Now, doing that And how’s this for fun: In Atlanta, going to do it, huh pal?” in a pick-up/camper while pulling a Georgia, the highway crosses the huge Now, you’re getting the idea! It ’s one trailer is one thing, but if you can just international airport. The road is reces­ thing to say that maybe you’ll try this imagine adding to that the trick o f flying sed below airport level and the main little stunt... if it doesn’t rain, or if a radio controlled model while seated in runways cross over the road! Permission you get home early from that party, or a specially-built “cockpit” (complete was granted by airport officials for a if you happen to remember to charge with plexiglass windshield) built into quick passage over the airport. The run­ your batteries. I ’s something else to the top of the camper, then you're just ways were dosed to air traffic so that realize that you are committed to do it beginning to realize what this couple has the "Liberty Bell” could get across. So . . . that you’ve told everyone you’ll do accomplished. what happens? The fuel line chose this it, and that you’ve got people lined up Hey, just for the heck o f i t . . . the moment to pick up some dirt from the along the way to cooperate in the en­ next time you go flying at your local 32 ounce fuel bottle and kill the engine. deavor. Now, you had better fly even if R/C field . . . borrow a friend and his The plane had to be dead-sticked on the it rains, leave the party early . . . or don’t convertible, fuel up your plane and take six-lane highway, between runways, and go at all, and don’t forget to charge o ff from the street in front of your no way to get a repeat shut-down of the your batteries. . . There’s a packed house. Now get yourself about 300 feet airport to try again. “ Liberty Bell” had house, the spots lights are on, the or­ of altitude, climb into the convertible, to be surface transported to the other chestra just finished the fanfare, you've and while your friend drives... with side of the airport to resume her flight been shoved out on the stage, and the someone else to guide him on direction ... with a filter in the fuel line! curtain has closed behind you . .. You and speed to keep pace with the plane To complete this whole extraordinary Gotta Deliver! . . . fly to your club R/C field . .. around picture, the toughest part of all must Bob and Doris Rich did just that. buildings, along a row of covering trees, be considered . . . commitment. J ust ima­ They had help from others; Ed Sweeney, over an elevated cross-road, circle around gine one more factor about that flight Bob “ Smedley” Sutalski, Lee Taylor, while stuck at a stop-light, negotiate a from your house to the flying field. and many more along the way. But Bob clover-leaf or two, cross some high-ten­ Let’s suppose that one o f your buddies, and Doris were the ones who were truly sion lines, and whatever else you may who knows you’re going to try it, has a Continued on page 82

4 MODEL BUILDER OVER THE COUNTER

R/C Stinson Reliant, by Sterling. Spans 58 inches, for .40 to .56 engines. Internal Switch Mount by Ace Radio Control.

• Any mention of the words “ gull wing" in mind. The large fuselage has lots of brings the famous Stinson Reliant to room for radio gear (and hands to in­ mind. This classic lightplane o f the '30s stall it!), and the large tapered wings is being kitted by Sterling Models, 3620 have lots of area to lower the wing load­ 'G 'S l., Philadelphia, Pennsylvania 19134. ing and increase stability. The Stinson Scaled 1-3/8 inch to the foot, this 58 Reliant is available from your dealer or inch span beauty is intended for .40 to direct from Sterling for $54.95. .56 power. All balsa parts are die-cut * * * from density selected balsa and then Phil K ra ft’s ubiquitous Ugly Stik has numbered for identification. The cowl been miniaturized from Middle size, to and wheel pants are vacuum formed Liddle size, to Baby Size, and now to from ABS plastic. Aluminum engine Littlest Size. This tiniest of the “ Stiks” mounts are included, as well as formed is Ace R/C Inc.’s latest offering for the wire landing gear. The Stinson Reliant .020 power, single channel pulse pro­ should make an ideal first R/C scale mod­ portional R/C market. The “ Littlest el. The structure is designed with strength Stick,” designed by Fred Reese, spans

New accessory items for 1/2A R/C by Ace. Wheels, spinners, and throttle. a mighty 19-1/2 inches. All up weight, with the Ace Baby radio system in­ stalled, and a Cox .010 bolted on the nose, is 5.75 ounces. This “ giant” can be built, covered, and readied to fly in one evening. It would appear that the age o f “ disposable” (less radio and en­ gine!) R/C planes is nearly on u s. . . re­ tail price o f the kit is $3.95. Test gliding over tall grass, that sacred cow o f R/C flight trimming, is not recommended for the Littlest Stick ... you might lose The "Littlest Stick", kitted by Ace R/C, for .010 or .020 and pulse rudder control. it! Available from dealers or direct from Ace R/C Inc., Box 511, 116 W. 19th DECEMBER 1975 5 A new dimension in Satellites, the 788 GLH, .29 to .40 engines. A 9 " long shrimp boat, by Plankton Boat Co.

Bee, and Medallion cylinders. Retail price is $1.98. Pulse fliers will welcome the Internal Switch mount from Ace. This is a formed aluminum bracket with mounting hard­ ware to fit the Continental Wirt (CW) switch that is supplied with the Ace Pulse and Digital Commander radiosys­ tems. The bracket mounts quickly with servo tape, allowing a concealed mount­ ing o f the switch, with an outside ac­ tuator. The Internal Switch Mount will retail for $.89. * * * Micro Models, P.O. Box 1273, Covina, California 91740, has introduced a new series o f Old Timer replica models in­ Micro Models' small size Scientific Mercury, spans 48 inches. For .09 power and 3 channels of tended for R/C. The first o f the series, radio. which is available immediately, is a re­ St., Higginsville, Missouri 64037. Dee, these spinners are made of glass production of the Scientific "Mercury.” Ace has also introduced several new fiber-filled nylon. Available in white on­ The 48 inch span reproduction of this accessory items for 1 /2A sport planes ly, the 1 inch spinner sells for $.98 famous old timer designed by Ben and racers. Two sizes o f wheels, in 1 -1 /2 while the 1-5/16 diameter version sells Shereshaw, can be flown with a hot and 1-3/4 inch diameters, are now avail­ for $1.19. Both are specifically designed .049, or better yet, an .09 or .10. The able. These wheels are top quality, low for use on Tee-Dee engines. new series is intended for sport flying weight, low drag, and low cost. The Third channel throttle operation with or S.A.M. competition with three chan­ white nylon hubs have a 3/32 inch hole 1/2A Cox engines is now possible with nels operating throttle, rudder, and ele­ for the axle, and black rubber tires. the Ace Tee-Dee Throttle sleeve. This vator. A similar kit of Scientific’s "Miss Either size sells for $1.49. machined unit provides very low idle America” will be available around Jan­ Two new spinners are also available speeds and minimal top end power re­ uary 1. All parts in the kits are pre-cut, from Ace. Since ordinary nylon will ex­ duction. The sleeve fits a stock Tee-Dee which makes for very quick assembly pand at the high R.P.M.’s that can be cylinder with only minor modifications, time. Weight o f the Mercury, with an turned by engines such as the hot Tee- and will also fit Black Widow, Golden O.S. .10 and Cannon 3 channel radio

Celebrity, by Cathedral Model Mfg., for .09 to .25 engines and small radios. Span is 42 inches.

6 MODEL BUILDER Plankton Boat Co. models are propelled and steered by pulse radio. "Rubber Ducky" R/C glider, by Performance Flight Systems.

Half-A Mini-Jenny, by Cathedral Model Mfg.

GloBee glow plugs. gear, is 26 ounces. The $24.95 kit fea­ tures machine-cut, selected balsa and hardwood parts and full size plans. The Mercury is scaled accurately from the original plans. Available direct from Micro Models or your hobby dealer. * * * “Go Like Hell” is what the G.L.H. on the Satellite 788 G.L.H. kit means, and that is just what it does. This Class B/C/D competition free flight design holds the AMA records in Category 1 C-Gas Senior and Category 2 B-Gas Junior, as well as having won 1st in C Gas-Open at the USFF Champs at Taft. The Pro Kit, from Satellite City, 9486 Sandusky Ave., Box 1935, Arleta, Cali- Ready-to-run R/C gunboat by Swank Products fires 20 ft. stream of water. Direct "water hit" Continued on page 85 by another boat is signalled by firing of ping-pong ball "depth charges."

"L il’ Snip” Half-A combat, by Midwest. "F ire fly", .15 to .19 combat, by Midwest.

DECEMBER 1975 7 PHOTOS BY THE AUTHOR oto ts bd ad / tanr Her trainer. Trimotors R/C Ford the equals and almost career bed, test control transport beenan bodied, square had channel design, trainer 2original primary and My 1 start. a with Flying flying. jetliners. majestic the commemorate to and ders crea­ and imaginative independent, mote cile and manageable trainer/workhorse trainer/workhorse manageable do­ and more a neededcile I that me convinced so weary and heavy work­ getting trusty was old horse The Airways! Island of pre-determined free-flight, as a years 22 was models powered .049 in equipment beauty of American-designed, modern modern American-designed, of beauty pro­ to contribution A American.-Hall. m vr own. very my f o soon bomb” “ wing my low .35 on typical transition son’s to Attempts throttle and logical operation. aileron next into the get and to was step aircraft, new on a fly for to honorably ‘‘retired’’ was she over for hasperformed She model. type ­ fly and building designing, flight/scale ease a andtrainer. flying of has .stability .yet .the a"trainer" clougey than rather aircraft up-to-date wanted something easy to fly that looked different. He has Heit! different. looked that fly easyto something wanted buil­ model for philosophy design tive phy of designing miniature aircraft types aircraft miniature designing of phy Time ceiling. the from hanging forever R/C in starter slow another am I ing, rie ws ie wt m od philoso­ old my with mixed was trainer an like looks that wantsamodel who flier R/C sport the for different really .Something .. HALL By ART • A-mer-i-ca’nus (-ka’nus). n. One thing thing One n. (-ka’nus). A-mer-i-ca’nus • The "Clipper" flies well w ith or without rudder control. The author author The control. rudder without or ith w well flies "Clipper" The 8 ih ay er eprec i free in experience years many With This need for an aileron and throttle throttle and aileron an for need This LPE A ERICANUS AM CLIPPER standard model engines seemed most most seemed engines model standard powerplant a of problem the to jet” any solution “ an f o design Am- Clipper The “ ericanus.” Turboliner the f o opment jet engines available. A turbo-prop using turbo-prop A available. engines realistic and jet practical no are there since ap­ keen majes­ and sleek A America’s of models.” just preciation “ than rather workable, yet the muffler sticking out out some With sticking problem. a also was muffler side the the yet workable, simultaneous a involved transport type devel­ and design the to led jetliners tic mgntv dsg doln, h twin- the doodling, design imaginative Without that propeller, the "Clipper Americanus" could easily pass for a jet-powered airliner. airliner. a passjet-powered easily for could Americanus" "Clipper the propeller, that Without The metal foil covering completes the image. the completes covering foil metal The "Guests on this show were flown here by . . . " Horizontal stabilizer stabilizer Horizontal " non-sensitive. . surprisingly . . but by here is all-moving, flown were show this on "Guests ern all-flying stabilator. all-flying ern carried 4 channels; the three primary primary three the channels; 4 carried evolved. eald ea fi cvrn ad mod­ a and covering foil metal rivet- detailed by accentuated look modern sleek swept-back, the features and package er hs emte ue f ihwih, 3- lightweight, of use permitted This con­ and a wasstable it that determined ubn, ubpo pwr akg was package power turboprop turbine, trollable aircraft without rudder control. control. rudder without aircraft trollable flight controls plus throttle. It wassoon It throttle. plus controls flight “ Clipper Americanus” uses this pow­ uses this Americanus” Clipper “ For initial flight tests, the prototype prototype the tests, flight initial For OE BUILDER MODEL

FULL SIZE PLANS AVAILABLE - SEE PAGE 88 DECEMBER 1975 9 "Jet pods" house engine cylinder and muffler. A boarding passenger's-eye view of the "C lipper" accentuates its realistic lines. Article on next Props last a long time! two pages explains the use of metal-foil covering.

Close-up view of the Clipper's fuselage discloses the riveting pattern. Fuselage is sheet balsa, wet-formed over P.V.C. pipe. Radio hatch on bottom, in front of wing. sheets around a 3-1/2 inch O.D. PVC pipe, covered with newspaper to help absorb the moisture for drying. Use one of these pre-curved sheets as a fixture to cradle the two crutches (top side down) for alignment and joining. A t­ tach all bulkheads and the curved side sheets. Build up the nose wheel shaft Art Hall hoists the "Clipper Americanus", unit before covering the forward fuselage giving an idea of its relative size. top. Leave the shell o ff the top and bottom o f the aft section and work on channel gear. . . in this case, the Cannon the fin assembly. radio. Nosewheel steering was coupled VERTICAL FIN ASSEMBLY: Build to aileron. With a generous 420 sq. inch the basic fin structure on the “ X ” crutch wing, a relatively low power .099 engine, noting that F-1, F-2 and F-3 all go and a gross weight of only 3-1/2 to 4 through the crutch to the bottom shell pounds, the design philosophy and ob­ and tie into the sub-rudder (SR). Do jectives of a realistic, manageable trainer not cover the fin until one of the last Pod and fin construction is strong and rigid. Bottle tank is directly behind engine. were achieved. The stabilator proved to steps, since there must be access to the be surprisingly non-sensitivě; and pitch pivot box to mount the bellcrank and Cement in place, with E-2 against F-1, control is smooth and positive. Others aluminum tubes. and the aft end flattened against F-3 on can develop larger, higher powered ver­ Build up the stabilator pivot box. each side. Locate and drill the pivot sions with full house radio and retracts, Use a drill press to accurately drill the tube hole and travel slot each side. Make which would be interesting, however, bearing hole in the side plastic plates for and attach fillets. Build up the bottle this machine is designed just for R/C the front pivot tube. Mock-up the 30° tank onto the firewall and attach the transition training and sport flying. If I variable bellcrank to the two tubes and engine mount. Epoxy the firewall assem­ can fly it, anyone should be able to! drill the holes for the retaining pins. bly into the pod. CONSTRUCTION: The full size plans Remove the tubes and bellcrank and FINAL FUSELAGE ASSEMBLY: should be self-explanatory for the rou­ mount the pivot box into the fin ’s frame. Now, before covering the aft fuselage or tine construction details. I show my POWER POD: Make the pod shell fin, would be a good time to mock up recommended construction, but “ build­ from two plys of soaked 1/32 balsa your servo installations and run your ers’ choice” and “ modifications" prevail. sheet, rolled into a tube the diameter Gold-N-Rod through the aft fuselage for So these instructions are limited to over­ o f former E-2. Position and cement E-2 elevator, throttle and rudder (if used). all explanations and specific or unique in place. Cut out firewall E-1. Flatten The fuselage may now be completed aspects of construction. the rear o f the shell as if to fit against and covered. If rudder control is desired, FUSELAGE: The basic structure is F-3, and the front end will assume the build and attach it. If fixed rudder is a sheet balsa box crutch forward, and oval shape o f E-l which can then be used, build it onto F-3. Slip the bell­ an “ X ” crutch aft, the whole covered positioned and temporarily pinned into crank inside the pivot box and run the with a sheet balsa shell. I formed the place, slot the top and bottom o f the aluminum tubes into position; pin and shell by wrapping water-soaked balsa shell to slide onto the fin structure. Continued on page 84

10 MODEL BUILDER PHOTOS BY THE AUTHOR

The author's prize-winning A-20 entry in the 1948 Higbee National Model Plane Exhibit Contest. Remember the C Z Model Airplane Co. which sold aluminum foil-covered solid models just before World War II? This is the first we've seen on flying models. RIVET DETAILED METAL FOIL COVERING By ART HALL . . . This article compliments that of the "Clipper Americanus",but can apply to any aircraft that warrants a natural, polished metal finish, complete with flush riveting.•

• All-metal aircraft have been produced in quantity for over 40 years, however, duplication of the rivet-detailed, metal finish for miniature airplanes has been a neglected craft with model builders. In 1947, the author first developed the “ metal fo il” technique described here to realistically model all-metal aircraft. This type covering has been used for several models built since then, as shown in the photos. The latest application of metal-foil covering was for the au­ thor’s RC Turboliner, “ Clipper Ameri- canus” featured in this issue. • The technique is not difficult, and the results are realistic. The “ secret” of the technique is to use paper-backed foil, which makes it as easy as cementing paper to wood; the same as covering with stiff paper. Compound curved areas do present a problem. Use a conventional finishing technique with silver dope, or work in a color scheme to incorporate The author with a metal foil-covered P-47 built while on a tour of duty in Iceland. 1954. as a these "d iffic u lt” areas. Also, some pre­ USAF jet fighter pilot. planning is required to make an overall 11 DECEMBER 1975 The "Clipper Americanus" (see page 8) is Art Hall's latest model using the metal foil covering technique described in this article. In this case, the foil was applied over a balsa sheet skin covering. paper backing. Cement the next “ plate” to this area; use a rather heavy tissue cement or white glue. Where the model is sheet covered, the foil plates are closely butt-joined in an overlay. Fit each plate, then rivet detail it and cement it in place. Tissue cement works nicely on a primed surface. Use a soft cloth to rub out any air bub­ bles. Clean o ff excess cement with thin­ ner. Use tracing paper over work already laid down to trace the proper fit for adjoining plates. It is also useful to draw the desired patterns on thin tracing pa­ per and emboss right through it onto the foil. This is particularly helpful for flush rivet patterns, as they can be laid This free flight B-36 was also built during the author's tour in Iceland. On this model, the metal out right side up, then the tracing paper fo il is the only covering, applied directly to the framework. Span was 66", w ith .049 power. can be turned over for working on the back side! A new technique of sealing the butt-jointed plates with press-on Chrome Metallic Tape (Paratone, Zip-A- Line) was used on “ Clipper Americanus.” Attempts to find a regular source o f paper-backed foil have not been too successful, and the only source known is the rolls of holiday gift wrapping. Plain bright, metallic aluminum foil is hard to find! Colored foils seem more available. These can be used and attached with white glue (A “ Golden Clipper” would be spectacular!). Wash excess glue off with a water-wetted cloth as cover­ ing progresses. Do not try to use tissue cement, as it will remove the coloring from the foil. This can be turned to advantage, however, in that one can use Art shows the technique of applying "rivets" to the metal foil. A brass clock gear is mounted thinner to wash the color o ff and get on a convenient handle and rolled along a straight-edge. Takes some experimenting. basic aluminum foil if it can’t be ob­ layout of the desired pattern of plates, for the right effect. Small plates, junc­ tained otherwise. junctions, rivet lines and spacing. Rivet­ tions and other details may be imprinted After covering the model, thinner or ing tools are made from clock gears with a sharp pencil or stylus using care water (depending on the cement used mounted on a handle. The gear is run not to tear the foil. for attachment) can be used to remove along a non-skid ruler to imprint neat Two methods of metal-foil covering any excess on the foil surface. The foil rows o f rivets. have been developed by the author. For can be polished for a slightly dull or A proper work surface is required. scale models and RC types, which can worn look and it can be waxed. Avoid It must be firm yet “ give” enough to stand the weight, a basic sheet balsa any sharp objects which can cause a dimple the foil. Cardboard backs of covering is applied, filled, and primed. scratch.Trim is best done with the press- lined paper pads is about the right back­ For rubber or gas free-flight models, on letters, tapes, or plastic trim film . ing material to use. For raised rivets, the paper-backed foil is the primary India ink can be used if the surface is place the foil side down and run the covering applied directly to the struc­ first rubbed with talc. rivets in on the back side; for “ flush” ture. In the latter case, overlapped joints It might be interesting to try this rivets, run the rivets in on the foil side. can be used to advantage. Lightly score realistic covering on that next replica Experiment with the backing surface the lap area and peel the foil from the o f an all-metal aircraft. ·

12 MODEL BUILDER Meet Ed Manulkin, chief-cook-and-bottle-washer of Sterling Models. Philadelpia, Pa. The beautiful Stinson Reliant "Gull-Wings"were built from the newest Sterling kit. Span is 57-9/16", length 38" , scale 1-3/8” , for .40 to .56 engines. An outstanding ship from the Classic era. inm ιιητηι/ nnrm/mn /

■ ■ R/C News, by BILL NORTHROP

• Last month, our radio column was flying space, and the like, has held back rors were ones that could be avoided completely taken over by the R/C Aero­ the development o f flying skills by its by contest fliers of most any skill level, batic World Championships. While we modelers. so it might be worthwhile examining don’t intend to allow the same thing to The standard of ability varies widely. them more closely. happen again this month, we do want Using our AMA classes as a measuring The Takeoff maneuver in FAI is con­ to take some space to conclude our stick, you’ll find everything from Sub- cluded when the model turns approxi­ discussion on the flying seen at the Class A to Super-Class D Expert . . . mately 90 degrees out of the established World Champs. We'll also comment on and the geographical size of the country takeoff direction. Until then, every slight some o f the weak points in FAI R/C has nothing to do with it! Liechtenstein deviation from the flight path is cause contest procedures, and will briefly dis­ and San Marino are smaller in size than for downgrading. Yet, many pilots flew cuss proposals that we’ll submit to the the state o f New Jersey . . . combined half way to China before turning. Until CIAM R/C Subcommittee. . . . yet one is the home of the World the maneuver is reworded, the plane may If you’ve never witnessed an R/C Champ and the second place team, while be turned as soon as you have room to Aerobatic World Championship compe- the other is at the bottom of the totem bank without scraping a wingtip! tion, you probably imagine that all o f pole. I t ’s also surprising how many con­ the flying is top caliber... Not so ... Among the top competitors, we testants “ jumped” their planes o ff the In many of the competing countries, noted several maneuvers that were con­ ground. It’s OK to adjust your gear so the lack of modeling activity, equipment, sistently downgraded. Some o f the er­ the plane sits at a negative angle, but

Darrel Tichaeck, Spokane, Wash., built this 9 ' span J-3 Cub. Throttle Dean Hawks with his "Mini-Marquis" twin engine pattern ship. Uses and stick are linked to pilot's hands and arms, move with controls. Taipan .21 Schneurle mills. Gold Metalflake w ith red trim .

DECEMBER 1975 13 PHOTO BY DAVE KATAGIRI grades to zeros, many o f the stall turns turns stall the f o many zeros, to grades equal. about be) (should are weaving, avoid to helps runway flying the gains ff o it as gently ff o speed. lift plane the so angle will ground positive a at maneuver is well placed, it ’s difficult difficult ’swingover! it placed, well is maneuver penalties point the ac­ you but if happen slowly, celerate to apt more is which 113. at stands mark Russian control. roll and pitch elevatorsfor tiel just realistically rotate" “ can’t you if . Thacker's Bob is Col. This Ca. Sunnyvale, Club, R/C Pioneer by for the judges to see the stall turn/ turn/ stall the see to judges the for wingovers. really were M Figure the down­ prefer in pilots and well, do to ky up it set usingdifferen- to speed glider, this better ’s ith w it mph averaged 108.3 Stuhr Ken takeoff, to prior held Jamboree" IWW Front "Western at awarded trophies Beautiful te mnr nrcin, f h plane the if infractions, minor other overlooking higher, maneuver the score Jeff Breece, Auburn, Wash., with his scale Albatross, early German home-built. Unthrottled Fox Fox Unthrottled home-built. German early scalehis Albatross, Wash.,with Breece,Auburn, Jeff the if enough, paradoxically Flowever, hits the crossover on the button. the on crossover the hits to apt be will judge a crossover. the Psychologically, missing is 8 Cuban the in 36 is quieted by muffler and 12" prop, giving slow, quiet flight. Bolt-on firewall holds fuel tank. fuel holds firewall Bolt-on flight. quiet slow, giving prop, 12" and muffler by isquieted 36 14 Shoving on full throttle and blasting blasting and throttle full on Shoving Of course, the most common error error common most the course, Of ris­ more understandably ’s it Though h tp les emd o an higher earn to seemed fliers top The o f them were “ Stove Pipes,” and a cou­ a and Pipes,” Stove “ were them f o ever. Also, keeping your wings light light momentum. up wings building your keeping Also, ever. Point, Four Slow, whether however, rolls, enn.h Fgr M n te o Hat Top the and M Figure cerning.the that Most 156 high. of were they out as 3 wide as or were 2 only saw We hr i ntig n ihr maneuver either in nothing is there . . . Figure the doing while sky the in holes from ship the prevents tips the toward beginning. the at than end the toward case, the every In rate. roll inconsistent in error common most The maneuvers. looping on than maneuvers roll on points brings up an interesting thought con- con- thought This interesting Caps!” an Dunce up “ brings almost were ple M and Top H a t.. . but look at the rules the at look but . t.. a H Top and M how­ this, curing in helps Button” The “ faster rolling from came inconsistency ing for. ing bewatch­ judges the should .what and .. caller). German the by Hoot.” ("Uber ih Pit o Tre oiotl, was Horizontals, Three or Point, Eight hr wr ams n odTp Hats Top good no almost were There Most all of the better fliers poke poke fliers better the of all Most s on s h rl i cmltd We’d completed. is roll the as soon as straight any for calls that description days o f competition flying, performed We performed sel- Approach. flying, Rectangular four decent a all competition in mentioning f o anyone, days worth Hardly ’s again. t i over but occasions, lo ae o e aeu wt ti one. this with careful be to have also accomplished w ithout going a mile high? mile a going ithout w accomplished or M), starts (Figure top the at Hat) turn (Top stall loop the quarter and . loop roll . the quarter . the them, after f o both immediately starts In flight. vertical upper loop will will loop upper Judges ! bottom high) the too at usually whopper (and a and top ais,small the That at loop "Snowman." a not than hm t ah sed. a te be they Can speeds. 1 into mach coming at them ithout w maneuvers these expert D our f o some from hear to like tangular approach and landing on other other on landing and approach tangular it’s not. it’s (’Scuse me, “ Master” ) fliers after trying trying after fliers ) Master” “ me, (’Scuse From our low observation point, the the point, observation low our From $100. Johnny Clemens delivers, while Kemp Kemp while Clemens delivers, Johnny $100. for check also Nats, 5 7 SteveSauger at to Sterling's "Best in any scale class" award went went scaleaward class" any in "Best Sterling's Bunting. R/C CD, looks on. looks CD, R/C Bunting. The Rolling Eight was more often often more was Eight Rolling The ev cmetd bu te rec­ the about commented We’ve appear OE BUILDER MODEL smaller, even if if even smaller,

PHOTO BY DAVE KATAGIRI OS .35 powered Sig Cub, by Jim Houston, San Antonio, Tex., carries side-mounted camera equipped with automatic shutter/film winder.

Angle of shot from Houston's camera plane provides more realistic The prize photo! First known all-model, air-to-air picture. It took 17 photos than those from straight-ahead types. Uses EK radio. shots in one flying session to get it. Hmmm . . camera combat . . ? dom graded over a 6 for this relatively work at a W/C contest, then so can key and the unexpected additional ex­ simple maneuver. For the most part, officials who operate the event "machin­ penses were exceeded in size only by pilots began descending long before the ery." This should apply in particular the beautiful Swiss Alps that occasional­ turn into final, and nearly everyone was where a host country has not held na­ ly looked down on us from the south! too low and too far out on final, making tional contests that were at least as The most critical need at an R/C it necessary to add throttle and some­ large as the W/C event, if not larger. event is frequency control. There is times gain altitude, in order to reach the Let’s take a look at some examples nothing more unsettling to all contest­ spot. of a need for standardization of pro­ ants, and officials, than to see crashes As for the Landing, the inner circle cedures as experienced in Switzerland. resulting from radio interference. A t must have sunk about two inches after We hope that Edwin Wellenzohn, Ar­ Berne, there were at least four interfer­ four days of being hammered down by thur Hofer, Werner Koelliker, and other ence crashes. Two o f those were the “ controlled crashes!” As for rolling to a members of the Swiss Aero Club will result of poor frequency control. The a stop, some o f the models challenged understand that we are criticizing the others came from local CB operations the law o f perpetual motion to its fullest system rather than their individual ef­ that apparently were not out o f the extent. Anybody ever hear of drag forts. No doubt the monumental tasks ordinary, but had not been checked brakes? Now on to a very important matter concerning World Championship contest procedures. . . and from what we’ve read and heard, this applies to all other categories of model aircraft competition, as well as R/C. It is high time that con­ test procedures were standardized, and that to qualify as a host country for any given World Championship event, the modeling officials o f that country must agree, without exception, to fol­ low the procedures to a “ T .” Carrying this a bit farther, the strict requirements and level of necessary com­ petency has reached such a degree that we can no longer permit "honorary” appointments to critical official jobs in the operation o f a major event. If the Tom Waller, Bronx, N.Y., built this sharp Curtiss-Wright Junior from MB plans. It won the MB/ jury and judges can be "im ported” to PanaVise contest in the October issue. Scaled at 2 " to the foot, it spans 78 inches.

DECEMBER 1975 15 well executed maneuver if they saw it! Furthermore, a couple of “ training flights” the day before a contest is about as useful as studying first aid prior to performing brain surgery. It is our opinion that the judges for World Championships should be selected on the basis of their past experience, performance record, and lack of national bias (evident from previous competi­ tions). What country they come from should be of little consequence. Since only 10 judges do the scoring for 25 or more countrys, the matter of “ competi­ tion without representation” is of no consequence. If all o f the judges happen to come from only two or three coun­ trys, it shouldn’t matter, as long as they do the job well. Selection o f the judges should be handled by a special 3-man committee appointed by the C.I.A.M. The commit­ tee members should have judged at least Julian Barrs, Director of the Jacksonville Recreation Department, cuts the ribbon officially opening the Gateway R/C Model Airport. Burnis Fields (left) and Bill Atkinson hold ribbon. three R/C World Champs (sure, we’ll volunteer!) Continued on page 75 prior to the contest. Champ competition is a perfect example With the advent of the "clothespin of the “ honorary appointment" system system” in the U.S., some 10 years ago, that needs to be abolished. We under­ much R/C-lo-R/C interference has been stand the national bias thing is worse collared. It was finally adopted at the in C/L stunt, but that doesn’t give us Nationals a couple of years ago. There reason to tolerate it. shouldn’t be another R/C World Champs The most flagrant example o f national event o f any kind w ithout them. If bias in R/C judging that we ever w it­ they’re too “ prim itive” for FAI status, nessed, took place at the Doyletown use something more dignified, but what­ W/C in 1971, and as much as we object ever they’re made of, the “ no tickee, to dropping o f the high and low scores, no washee” frequency clips must be we must admit that it had merit in this. made mandatory! Maynard Hill attempted to standard­ As for outside interference, the flight ize R/C judging when he held a judge’s line light system, connected directly to a school in Germany, in 1968. The fo l­ panic button at the monitors, is another lowing year, when the pattern champs must. In Berne, if interference were were held in Bremen, things went pretty spotted, someone would casually say well. But the judging deteriorated in “ Yup, danged if it ain’t ” (in German subsequent years as “ honorarys” were or French, of course), and a foot mes­ given the appointment in place of senger would be sent out to let a contest­ “ Graduates.” ant know why he crashed! National bias is not the only prob­ judging is always a touchy subject lem. Many W/C judges, we’re sure, have to get into, but since we’re a long-time had little experience at the job, and member of this austere but downtrod­ what experience they’ve had, has been at "Hey, Poppa, you told me W E' were going den group .. . why not? small contests with inferior flyers. We fly in g !" MB's editor gets in a little borrowed Selection of judges for R/C World doubt that some would know a really stick time, while daughter Belinda kibbitzes.

Harry Appoian with his WW II Waco powered glider, at the Flight- Joe Tschirgi, displaced long-time DCRC member, now in Orange County, with his Junkers, at the Flightmasters, Mile Square Park. masters Scale Annual. MODEL BUILDER 16 Courtesy of LETECTVÍ & KOSMONAUTIKA, Czechoslovakia DECEMBER 1975 17 PHOTOS BY THE AUTHOR • li looks like another busy issue this this issue busy another like looks li • CHATTER CHOPPER n t I’l ut ie n la-f wt a with lead-off and dive just ’ll I it, on begin. to where just know to ’s t difficult i the builders, model the from in coming ae om o el o aot h Kavan the about you tell to room have time any spend to going not I’m Well, newsletters, club the and manufacturers, eetne h fslg. eew o...... go we Here fuselage. the he extended Products designed Du-Bro body, by kit 500 manufactured Hughes and helicopter the Tri-Star” “ with the f o review ideas new many so are there . . . time The Du-Bro "Tri-Star", with Hughes 500 body, as built by John Tucker for the review in this column. The kit includes a Scorpion body, while while body, Scorpion a includes kit The column. this in review the for Tucker John by as built body, as Hughes 500 available extras. are bodies Enstrom with Hughes and "Tri-Star", Du-Bro The u yu a b sr w’l oe i in it cover we’ll sure be can Bingham, you Larry by but built -Ranger Long” “ the next issue of MODEL BUILDER BUILDER how f o photos MODEL with of complete Magazine, issue next the Inc., Wauconda, III. We probably won't won't probably We III. Wauconda, Inc., DU-BRO TRI-STAR DU-BRO gear. Starting assembly . . . main frame, OS .40 engine, fan, and starter Engine and drive gears lined up and clamped for drilling, for clamped and up gearslined drive and Engine starter and engine, fan, OS .40 frame, main . . . assembly Starting 18 wiig y eun rm Germany from return my Awaiting By JOHN TUCKER JOHNBy over carefully, however, I changed my my changed I however, carefully, over chine. three the of any it that decided and looking mind After equipment. standard pre­ had I body. was very and mechanics seen the Scorpion viously with com­ kit, plete mechanics Tri-Star the and cardboard kit large two were month, last o f both boxes with the checklist which which checklist the with boxes both f o ois ol mk u a ey ey ma­ sexy very a up make would bodies as it with comes that want body Scorpion particularly the didn’t but impressed, body 500 Hughes the containing boxes You might make a mental note right right note mental a make book. might You instruction page 23 the of pages o e ey motn t yu n finding in you to important very be pages are going to four last these that now four last the in provided conveniently is First off, I inventoried the contents contents the inventoried I off, First can be interchanged within a matter of of matter a within interchanged be can you And building! start you okec, e’ tk a oet and moment a take let’s workbench, unbelievable. ease see it that’s or model finished the of pictures when bag right the in parts right the copter flies like a bird without any body any without bird a like flies copter the kit, the with comes fuse­ Scorpion which the lage namely, which minutes, styles 5 body three the to refers ally, it's four kits in one, since the heli­ the since one, in kits four it's ally, itself Tri-Star” “ name of The specifications Bird.” “ technical the the review an with pasture local the the see around you flying when it building start to w o wih r otoa bd kt at kits body optional are which of two 3.5 n $99 rsetvl. Actu­ respectively. $29.95 and $34.95 latter the Enstrom, the and 500, Hughes Before laying out the parts on the the on parts the out laying Before OE BUILDER MODEL are going going at all! This configuration makes an ex­ cellent trainer; then, when you get it trimmed out and learn how to fly, you can show up at the model field with a different chopper each time! The Tri-Star is an extremely rugged machine . . . all metal bolt-together con­ struction, with heavy duty steel gears and ball-bearings throughout. A dual cooling system is used with a special heat sink and cooling fan supplied with the kit! That engine is going to run cool even when completely enclosed, and on a hot day. Length o f fuselage is 36 inches, main rotor diameter is 45 inches, and flying weight varies with the selected body; from 6 to 7 lbs. Most any .40 engine will adapt to the mount­ ing frame, but I heartily recommend the O.S. Max .40, since it drops right in place perfectly. A special timing gear Basic assembly unit; engine, drive train shaft, landing gear, and front frame. attached to the drive shaft provides a unique starting system by pulling a tim ­ ing belt through the gear. Coming soon, the 21 parts packages and lay them out comes out o f bag No. 18. Very light is a collective pitch head, which I under­ where you can get to them without filing is required to clean up the sharp stand can be fitted directly on the Tri- mixing them up. Unfortunately, the in­ edges on the main frame casting. When Star without a lot of modifying. It will structions do not refer to specific part setting all gears on their respective shafts, also fit the other Du-Bro choppers, Shark numbers or bags during the building, it might be wise to run the set-screws in and Hughes 300. I ’m a confirmed col­ however, you shouldn’t run into any and out once before sliding the gears into lective pitch fan, so I can hardly wait snags because o f its simplicity! place . . . They do fit very snugly and to try it out. Start actual assembly with bag No. 8, might fool you into thinking they are Enough of th a t. . . Let’s get right "assembly o f the short gear shaft.” The set tight. When setting the first bearing into construction details. First, sort out 1/2 O.D. X 1/4 I.D. bearings, No. 444, into the frame, use the short gear shaft

Servo trays and radio box mounted on main frame. Heat sink, swash plate, and tail boom have been installed.

DECEMBER 1975 19 Servo and control-rod connections. "Knee-action" swash plate driver assembled on main shaft.

at the top of the frame to provide gear clearance (be certain that all bearings are covered with masking tape when filing frame). Before locking this assem­ bly in place, the main shaft assembly must be placed into position so that proper gear mesh can be established. My chopper required 3 out of the 6 special thin washers supplied to properly mesh the gears. When a good fit is ob­ tained, lock the clutch assembly in place. The next step is to mount the engine, according to the instructions. Install the fan and gear very carefully on the engine prior to drilling the holes in the mount. The gear is used to line up the engine properly. When satisfied, clamp Tail rotor drive and control assembly. Cutting slot in aluminum tail drive shaft to the engine in position and “ spot” mark aid disassembly. the holes. Then remove engine for actual as a “ line-up” guide. drilling of holes in mount. Use a No. 36 washer jams against the mount, you Assemble the clutch from parts in drill and tap the holes for 6-32 machine might have to trim the frame a wee bit. bag No. 18. Again, be sure you file any screws. Landing gear assembly was straight burrs off the clutch shoes so they work This drive assembly is the sweetest forward after identification of parts bags. smoothly w ithout cutting into the I ’ve ever seen! The gears are very high A nice touch is to burnish the aluminum spring. Be especially careful when using quality and the alignment is extremely skids with steel wool for that new look. Locktiteon the clutch so that free move­ precise. The gears really “ sing” when The recommended 8 oz. fuel tank doesn’t ment is assured. When cementing the properly se t.. . no lost motion here . . . appear to fit, but sure enough, it does clutch lining into the housing, butt the very compact, and very husky! It was tuck in nicely under the steel frame. ends together and slide it into place necessary to relieve the frame slightly Try as I might, I didn’t get to first carefully. Quick-Fix is ideal for this to permit full travel of the throttle arm base in figuring out how to install the operation. (cut o ff corner slightly with a Dremel heat-sink on the engine. I was about rea­ During the fitting of the clutch/gear tool). Look closely where the main rotor dy to drill some holes for my own “ Rube and shaft into the main frame, you will shaft is secured in the frame by bolt Goldberg” fix when my son, John )r., probably have to file away a small area No. 445 and washer No. 414. If the showed me how the little straps act as

Main rotor hub assembly. Note 3rd wire spring to take out backplay Method of setting blade angles w ith jig furnished in kit. of stabilizer bar.

2 0 MODEL BUILDER Front and rear Hughes fuselage shells trimmed to fit each other, and Cutting of excess plastic from window shell, installed on mechanics unit. found the hole had been bored from both ends of the shaft and did not meet exactly in alignment. I simply redrilled the hole from one side only and the shaft went in smoothly. The bell-crank mount No. 482 was remade because crank No. 459 was too short to reach the pitch control shaft centerline. The hole was simply relocated 4mm closer to the pitch shaft, otherwise the mount is the same. In general, the entire tail drive assembly and control system is very, very smooth and o f excellent design. Subsequent flight tests showed this unit to give better response than any other system tested to date! A final note in the assembly o f the tail tube . . . be sure you don’t cut the tail tube because it appears to be too long (I almost did!). Vertical fin clamped to stub for cementing. This tube slides forward into the frame almost 3/4 of an inch, and is very decep­ tive. The bearing in the frame must be all ficulty whatsoever, and if you are read­ the way forward and against the clutch ing this article, you'll have several photos bushing. to guide you. I chose the Orbit radio About the only area in the entire and enlarged the servo mount bearers to Hughes fuselage sides clamped with clothes assembly process where the beginner accomodate the standard servo mounts pins during cementing. could get into trouble is in the control with provisions for the switch. The flat clamps. Sure ‘nuff, a closer examination hook-up from servos to swash-plate. The battery pack was chosen for ease of of the advertising photos showed him to radio installation instructions are only mounting (via double-stick foam tape) be right. Boy, did I ever feel like a dum­ fair, but the radio manufacturer will on the radio box. All cable connectors dum! probably have supplied this data to the were located inside the box. When you get around to the bell- modeler anyway. I kept getting the feel­ The main rotor was assembled per crank mounting, be sure to correct the ing that there was a missing 3rd sheet, the instructions, without problems. Just sheet No. 1 drawing per the “ amend­ showing the control hook-up, or a draw­ make sure the bearings are installed in ments” instruction, otherwise you’ll pro­ ing in some corner that I couldn’t find. such a manner that the bearing mount bably get the EZ connector on the wrong An experienced builder will have no d if­ Continued on page 83 side of the bell-crank. The tail rotor drive shaft is very novel in that it uses 5/16 aluminum tubing with steel couplers cemented to the ends and 2 nylon bearings to keep it centered inside the tail boom. My per­ sonal preference for cement in this case is Stabilit Express, however, I’m sure Quick-Fix will work just as well. Cut out the aluminum (slot area) very care­ fully with a Dremel tool and make sure the drive pin fits easily before cement­ ing on the brass cover sleeve. For the tail gear assembly, I reversed the drive shaft as instructed (in the Hughes 500 instructions) without diffi­ culty. When installing the pitch-control shaft No. 483 into the rotor shaft, I DECEMBER 1975 21 Dan Moore releases fellow SPOT Club member C liff Schaible's Lanzo Record Breaker. The OS 60 engine features electronic ignition with inductive pickup for points. Lanzo plans available from Pond or MB.

Pli/S SP By JOHN POND flight models in the London area is a year to the outstanding old timer flyer. rather hazardous proposition, there are Sounds great! I ' fields easily accessible 20 to 50 miles When visiting London, four things • If you couldn’t contact the colum­ out of town. Most fields, like the Shut- (in the order o f the w riter’s preference) nist during the month o f September, it tleworth Field, are surrounded by cab­ should be seen: (1) The R.A.F. Museum was because a long overdue trip to Eng­ bage farms, making retrieving a delicate at Hendon (outstanding!), (2) Science land and the continent was finally taken. chore. In many respects, when viewing Museum collection o f airplanes, (3) The At the risk o f sounding like a Stanton the flying sites, an American is reminded Shuttleworth collection (if flyingdemon- Delaplane or an Arthur Frommer, some of East Coast flying conditions, with strations are being given, this is number observations from a modeling standpoint trees, brush, and other similar modeling one),and (4) The Imperial War Museum. are in order. obstacles. There are other things to be seen, like Much to the w riter’s delight, England Despite the loss o f John Haggart, a the DeHavilland collection and the is a hotbed o f old timer enthusiasts. real O/T spark plug, the gang is still “ Toucan” man-powered glider at Hand- Small wonder that these events are carrying on in great style. Present plans ley-Page Field. Of course, visits to the staged on an official basis during the call for a perpetual trophy in honor of Aeromodeller office in Hemel Hemp­ British Nationals. Although flying free Haggart’s memory, to be awarded each stead (what a great host is Ron Moul-

Most unusual plaques awarded at the Berkshire Annual Massachusetts Dan Stokes, 15, of Keller, Texas, proves that you don't have to be an Old Timer R/C Championships. "old tim er" to enjoy building and flying Old Timers!

2 2 MODEL BUILDER ton!) and to Heny Nicholl’s Hobby shop on Holloway St. You won’t regret any of it!! Almost forgot to mention Ron Rad- don, who was a perfect host, doing most of the chauffeur work to all the great places. With hospitality like that, it was no wonder the columnist was able to see most everything, even to Pete Fisher, of Performance Models, out in the country! MOTOR OF THE MONTH During World War II, with materials in critical supply most model engine manufacturers turned their talents to producing small wartime accessories. When it was seen that defeat for Ger­ many and Japan was inevitable, it was then that all the garage experimentation Here's the SPOT family (I to r): George and Bobby Haley, Jim and Marianne Clark, Andy with engines that had been going on Anderson, Shirley Moore, Howard Carman, June Anderson, Randy Carman, Betty and C liff finally came to light. Schaible, Narma and Don Hartman, and Dan Moore. Society for Preservation of Old Timers! The year 1945 was the one for new engines, and Bill Atwood’s was no ex­ First, Randy sent us photos and a close. ception. In a small ad, Wentzel and A t­ write-up on the 2nd Annual Berkshire Not to be outdone by C liff’s impec­ wood Co., o f Los Angeles, announced R/C FlyingClubO/T R/C Massachussetts cable work, Esio Grassi produced a gor­ the new Atwood Champion Model H, Championships (w ouldyou mind repeat­ geous Miss America, complete with all priced at $23.50. Thus opened the Jan­ ing that? wen) on August 10. Weather trimmings, including the flag and name uary issue o f Model Airplane News for was the best yet, according to all, being as originally advertised. Flew good too, Bill Atwood and his myriad amount o f one of those great hot days that you placed second in Antique! engines. generally have to work on. The Texaco Event, which seems to be The engine proved to be powerful C liff Schaible wowed everyone with catching on back east, had many en­ . . . something the airplane, car, and boat his ignition powered Lanzo Record trants. Called the Fuel Allotment event, boys were looking for. The immediate Breaker in the new Texaco Event. With most any old timer model can compete. success o f this motor brought on the a converted O/S 60 engine, he obtained President Ricco Dus, of the Berkshire Mode! J, followed by the Glo-Devil ver­ an eight minute motor run for a total Club, flew a Brooklyn Dodger clear out sion. In every case the Champion gave flight time of 20:57. No one even came of sight, spun it down and lost a wing. good performance. As with the Herkimer engine, many modelers did not like the rear intake, as this made mounting and cowling the engine a little more tedious than the simpler front rotor engines. Regardless, those fellows who appre­ ciated good power used Atwood engines. The writer has yet to hear better sound­ ing ignition engines than those Cham­ pions in Bill Burgess’s Playboy Cabin, or John Drouiliard’s Westerner, the latter being the most spectacular both in per­ formance and crash! To summarize, the Atwood Champ was B ill’s best .60 cu. in. engine, regardless o f any other special engines he built. Incidentally, for those who wonder what happened to Bill Atwood, he has only recently retired from the L.M. Cox Mfg. Co., where he spent many years developing and perfecting good Tee Dee engines. Look at them carefully, you can see the Atwood influence! SPOT SHOTS Received several large brown enve­ lopes with all sorts of goodies in them from Randy Carman, the top publicist of the SPOT club (Society for the Pre­ servation of Old Timers), wherein she states that I don’t have to write a col­ umn this time! Gotta agree. If all con­ tributions were like the one Randy sub­ mitted, then MODEL BUILDER would have to expand to 150 pages! (Groan! wen) All kidding aside, we can always use good material like that! ATWOOD CHAMPION Drawn by TEX NEWMAN

DECEMBER 1975 23 FULL SIZE PLANS AVAILABLE - SEE PAGE 88

24 / " * 6 * MODEL BUILDER 2Voo -»yooyoo tiř,/ / O? Ocof, ' V / w * C .*1 2 0 ? i - * V o O t i p , Revival of the Kite and Model Aeroplane Association Days, held at Old Warden Aerodrome, Phil and Otto Bernhardt accept trophy from England. Bob Kinroy, Alwin Greenhalgh, Evelyn Barret, C.R. Moore, Peter Spence, Howard Boys. "Daddy Warbucks" at Taft SAM 21 contest.

Rare stick gas job designed by Frank Ehling. Bob Schafer built it Winners of 1st place at First Annual SPOT OT contest (I to r): Vince from plans in the 1936 Zaic Model Aeronautic Yearbook. Bonema, Ray Hinds, Ted Patriola, Mark Patriola, and C liff Schaible.

Ricco bravely says it will fly again! hawks were spotted thermalling across Everyone from AMA V-P Dist. II To make a long report short (Too the field. The rush for registration and John Byrne to SAM Prexy Joe Beshar late now, John! wen) the Massachusetts flights was something fierce. Unfortu­ thought it was a great contest. Joe, skies were filled with many pretty birds, nately, strong winds came up shortly never at a loss for words, praised the and thunderheads that never materialized thereafter, and flying slowed, with most SPOT Club for their activities. Wait un­ into storm. Incidentally, their club pa­ pilots indulging in “ strategy flying.” til next year! per, "Berkshire Buzzard" is an excel­ Some of them must have missed be­ ANNUAL NORTHWEST O/T lently done publication by George Par­ cause Jack Van Dusen picked up his CHAMPIONSHIPS ker, jack-of-all-trades man; editor, con­ Red Zephyr on the other side o f the With contest reports coming thick test director, competitor, etc. river, Tom Acciavatti dropped his Miss and fast, the columnist couldn't over­ Leaving hard-working George, Randy Philly in the RCA Complex, and Cliff look the material submitted by Bob comments on the First Annual SPOT Schaible demonstrated how to land a Stalick (remember him? He writes on OT R/C contest on Sept. 28 by saying Lanzo in water, w ithout floats. Don free flight). As usual, a great time was the contest enjoyed great weather in Hartman’s So Long broke a wing when had by all, with a noticeable increase spite o f Thursday, Friday, and Saturday he let the model loop on him. He is now in contestants. Must be doing things looking just terrible with rain. conferring with Dan Moore, the all time right as this contest gains in stature Registration was light until seven pro at breaking wings for help. Haw! every year. Continued on page 65 OLD TIMER Model of the Month Ben Shereshaw s "PIONEER" Designed by: Ben Shereshaw So it would seem that the Pioneer is extremely stable, and with moderate Redrawn by: Phil Bernhardt aptly named, for many beautiful designs power and radio control, it should make Text by: Bill Northrop • materialized from Ben’s drawing board a very picturesque figure, “ putty-put­ in subsequent years, with the “ Custom ting” around the field at low altitudes, • To quote Ben Shereshaw, from the Cavalier being the best known o f all. it also qualifies for and should make an January 1938 issue of Flying Aces, in By the way, Ben is the key figure behind excellent contender in the Texaco and which the "Pioneer” construction article Bantam Model Products Corp., manu­ Antique events. was published, “ Regardless o f the fact facturer o f the famous pre-war Bantam Once again, the old magazines did that during the past several years I have engine, and currently producer of the not over-concern themselves with bal­ designed and built scores of gas models revolutionary new primable glow plug, ance point location, and none was speci­ of all shapes, sizes, and styles, none has the “ Head Start." fied for the Pioneer. Considering the given me greater personal pleasure and For a picture o f the Pioneer, check force layout, along with a symmetrical satisfaction than that derived while work­ back to the “ Plug Sparks” column in rather than lifting stab, we'd suggest ing on The Pioneer, which was the first last m onth’s issue. The parasol wing and starting at about 4 to 4-1/2 inches back real gas model that I made." high thrust line should make the ship o f the wing leading edge. · DECEMBER 1975 25 Chris Corven, age 11, from Warren, Michigan, w ith his Legion-Air. He was 1974 N.S.S. Junior Champion. He also flies an Airtronics "A quila" in Standard Class. R/c SOARING coiks • Remember as far back as your high cross section of material to give ade­ school physics class? Whai was it they quate strength in tension and compres­ said about the way to make things sion. strong? Something about inelastic mem­ So what does all o f this have to do bers in tension and compression which with toy aeroplanes? In case you haven’t are prevented trom buckling by braces or noticed, most glider wings use a built webbing? Somewhere along the line, up “ I” beam for a wing spar (Most o f us the fancy terminology escaped me, but lazy modelers put the web in front o f the idea came along for the ride. or behind the spars, forming a channel, The whole point is that if you can which is structurally OK too. wen) Now, make a structure having strong outer armed with this rather crude introduc­ edges that won’t stretch or break, and tory engineering lesson, the causes of can put something between those outer some model wing failures should be more members to keep them from bending apparent. under load, then you’ve got a pretty Remember the whole load is carried darn strong structure. It ’s this basic rule by the wing spars in tension . . . that o f engineering that has brought about means pulling loads. Also, remember a lot o f things that we tend to take for that wood, be it spruce, pine, oak, what­ granted. ever . . . has far greater strength in ten­ Take most big buildings for instance. sion than in compression. Fine, the ma­ Chris Corven and his father, Dave, are members Practically all of the basic structure is terial we are using for spars is probably of the C.A.R.D.S. (Capitol Area Radio Drone Society). built from steel I-beams. Why the “ I” pretty good. shape? Because the " I ” provides the But, the problem comes in keeping certain that the wood we are using fot­ simplest, most economical fulfillm ent of the outer spars in the place where they spårs can take the load. Spruce has a our rule. The top and bottom portions belong. When your plane comes in con­ far greater strength-lo-weight ratio than o f the " I ” comprise the ‘‘inelastic mem­ tact with turbulence, killer thermals, or any other wood, which explains why it bers.” It’s a pretty safe bet that no your heavy foot on the winch switch, is so popular for spars... but there is matter what happens, you aren't going the wing spar does a lot o f flexing. This spruce and there is spruce. When you to stretch or break this heaviest part of is fine, up to the point where the glue are in your friendly neighborhood hobby the " I .” The inner, vertical part of the joints which hold the whole affair to­ emporium laying down your hard earned “ I” forms a web. Its purpose? Just to gether start to fail. As soon as one shear sheckels. . . be choosy! Find some good, keep the outer edges from pulling apart web comes unglued, the whole system straight and close-grained wood for your or crushing together. Anything more in falls apart at the seams. When the spar wing spars. If the spar material supplied the center would be wasteful. In a solid separates from the shear web, it has in the kit you are building isn’t up to extruded piece, such as a steel I-beam, room to flex and immediately takes on par... replace it! Remember, that bird there are no worries about weak spots a compression load. Pow! There goes is going to haul a couple of hundred in the material, or concern about ad­ the spar, the wing, and the plane! bucks worth of radio. hesive failure. So the concern in building So what can we do to improve the Something else to think about for an “ I ” is just to maintain an adequate odds? The most obvious thing is to be your own design. The strength we are 26 MODEL BUILDER PHOTO BY MIROSLAV KVAPIL lig ra Ad hs ie gun area gluing wider this And area. gluing er Is rs scin pa fr, size, form, plan section, cross Its gear. have it does What crosssection. acurved structure. of surfaces) bottom and (top outsides n ae wl afc te lgt perfor­ flight the affect will area and im­ loads the carry to able be as to launches, as well high-start and winch stand possible. as contour a should It uniform asweight. have light be must It do? to with a is astructure of What sort flat towards. a ’s t I wing? working were we the f o strength the increased have you sur­ bonded their of on glue inch square rated per are of Glues strength failures. number joint the decrease wider ashould use effectively can we shear wider webs, using By webs. shear wider surface broader a give will This spars? the since But load. the sizeof carrying the increase to wood is this do to way to need we spar, the of load ability the increase carrying To tension. in is after EEBR 1975 DECEMBER things these but glider, the of mance radio f o full fuselage a by it on posed and surface, bonded the Increase face. of use the allowing spars, the between sur­ those on not wood why increased the work, the put doing are spar the only The strength. tensile its increase oee ihMnkt n i otoldb Katrdo HLG lw pt et "re lyblat ie atr pack. battery hides ballast" clay "Green feet! 6 to up blown H.L.G. radio. Kraft a by iscontrolled and Monokote with covered what just analyze to have we first, But wider but thinner use not Why faces. Milan Kacha, Czechoslovakia, launching his "G ulf Coaster". It's Crazy Dave Thornburg, Albuquerque, N.M., and his "Sweepette" RC "Sweepette" his and N.M., Albuquerque, Thornburg, Dave Crazy It's Coaster". ulf "G his launching Czechoslovakia, Kacha, Milan the with do to little have limits) (within ith­ w to enough strong be to needs It Cost is very important. Few o f usin are f o Few important. very items. is Cost other some consider let’s clearly, design. structural the position to consider building aglider building consider to position the more alittle wing aglider f o quirements All o f this brings us a step further. further. step a us brings this f o All o o ta w’e eie te re­ the defined we’ve that now So winch takeoff at the 1974 North-South Challenge, Famosa Field, Bakersfield, California. Bakersfield, Field, FamosaChallenge, North-South 1974 the at takeoff winch George Steiner mounted a camera on his Graupner Cirrus to get this startling photo during a during photo startling this get to Cirrus Graupner his acameraon mounted Steiner George go into our toys are robbed from the the from robbed are toys our into go as ease of working with the materials. the with aseaseworking of work with. The primary objection that that objection primary The with. work our f o as part tant consideration, also strength, as well strength, also consideration, impor­ tant isanother Weight budget. family weight. Efforts at making foam wings wings foam and/or making appearance at their styrofoam Efforts in to weight. is had have wings to people easy most very and lightweight, strong, ok s od s ul-p ig have wings built-up as good as look inexpensive, is It is styrofoam. others the resulted in very heavy wings. heavy very in resulted oe eeomns n h modeling the in developments some n mtra ta sad ot above out stands that material One eety hwvr tee ae been have there however, Recently, jobs... so whatever funds funds sowhatever with these techniques o f working with with working f o techniques these with equation the eliminated have that field give credit to my benefactors. my to credit give that are stronger and faster to build. to wings in faster and resulting stronger are that increases efficiency, some building been in have there foam, along And weight." equals appearance “ els (Cox is making a small C/L wing wing C/L small a making is (Cox elsmod­ type R/C large, used in wings foam I’ll possible, Where people. f o variety rm mle fa sel. n i in­ is One shell). foam molded a from a from stolen been have describe to jection molded, the other is cut from from cut is other the molded, jection To date, there are two types o f styro­ f o types two are there date, To Most o f the techniques that I’m going going I’m that techniques the f o Most Continued on page 60 on Continued 27 Cars from Phoenix, San Jose, San Diego, Los Angeles, and Orange County at the Long Beach Grand Prix demonstrations.

R/C AUTO NEWS By CHUCK HALLUM

• Well, we’re finally getting into sus­ and rough terrain, such as for dune bug­ help provide some understeer (front end pension systems. First I ’m going to go gies . . . but not for dusty tracks, as most turning forces lower than those of the over a little on what current plate type people believe. With a good suspension rear to reduce the probability of spin­ chassis do, and get into simple front and system, both front and rear, adjustments outs). With a higher roll rate at the rear “ rocker” suspensions. This will pro­ can be made for different tracks if the front, there will be more weight transfer vide a base so that we can go on to the car enthusiast knows what he is doing. at the front during cornering. The pro­ more sophisticated types of suspensions. Certainly the full advantage o f suspen­ portionately greater weight transfer at The first thing people ask when I sion systems cannot be realized by a the front causes the front tires to be­ mention suspension systems is, "Why beginner. come less effective in turning while the do we need suspension?" I must admit On current plate type chassis, the rear tires work more uniform ly and keep it’s hard to answer that question, be­ plate provides some flexibility to give traction capability higher. This is one cause R/C cars are going super-fast, and some roll rate to both the front and of the reasons that hard front tires (no at best, suspension will improve perfor­ rear ends. The shape and thickness of extra springing) provide understeer and mance only a small percent, particularly the plate and the location o f the weight stability. on the kind of track surfaces we normal­ can make the front and rear roll rates a How do you measure the roll stiff­ ly race on here in the U.S. But who little different. Tire hardness, or flexi­ ness o f an R/C car? It’s rather com­ knows where R/C cars will really end bility, also contributes to the roll rate. plicated and possibly not worth the ef­ up in a couple o f years? Suspension In general, one wants the front roll rate fort, but some reference values are systems will really help on rough tracks to be higher than the rear roll rate to needed before we continue, so here goes. What we want to do is to measure how much torque it takes to twist the rear axle, in the lateral plane, a certain amount with respect to the chassis plane at the C.G. location. But we should in­ clude tire flexing because that contri­ butes quite a bit in R/C car suspension, so we have to make these measurements while the car is resting on a horizontal surface. Here is the method I have come up with to determine front and rear roll stiffness. 1. Place the car on a flat horizontal surface. Determine the fore and aft C.G. location by lifting the car with two fin­ gers, one on each side o f the car, under the chassis, until the balance point is located. Now firm ly tape a 2 ft. piece of piano wire under the chassis laterally, An early practice session at the Long Beach Grand Prix, before the crowds and sunshine arrived. perpendicular to the fore and aft center- Demonstrations drew lots of spectators any time they cranked up. line. Place the car on the surface and

28 MODEL BUILDER Delta front suspension on Arturo Carbonell’s 1974 road car. Chassis Extra front flexibility can be provided by a narrow chassis in the provides more flex than the front rocker motion. front, as in Earl Campbell's Associated car. bend or adjust the wire until the ends are the same distance above the surface. 2. The following procedure will be done on each o f the wheels . . . but let’s start with the left rear (LR). Place I / 16 to 1/8 inch pads of wood or metal under the right rear (RR), right front (RF) and left front (LF) tires. Lift the LR tire at the center with a weight-measur­ ing device until the C.G. wire ends are the same distance above the surface. Note the LR force, which is the weight carried by the LR tire. Call this WO(LR). Also measure the height of the center of the LR wheel rim and record it as HO(LR). 3. (LR measurements cont’d). Now remove the pad from under the LF tire . . . the left side o f the C.G. rod will drop. Now lift the LR lire again until Front suspension on Ray Carboneau's Thorp car is a "rocker." The rubber bushings springing, the CG rod ends are equidistant from the as well as some damping. surface. Record the force and height as W I(LR ) and H I(LR ) respectively. What AW(LR) =W1(LR) - WO(LR) lbs. sides may be a little different due to we’ve done here is twist the rear o f the A H (LR ) = HI (LR) - HO(LR) in. non-symmetry o f the chassis, weight chassis while keeping the CG plane hori­ The roll stiffness (S) is equivalent to the locations, or errors. So let’s average these zontal and know the extra force required weight difference divided by the height to get the nominal rear stiffness. for that twist. difference or, S(R) =S(LR) + S(RR) -5-2 lb./in. 4. Now we can calculate the (LR) S(LR) =AW(LR)/AH(LR) Ib/in. 7. Repeat steps 2, 3 & 4 for the right roll stiffness. Calculate the difference in 5. Repeat steps 2, 3 and 4 for the front getting S(RF). weight required to level the CG rod and right rear, determining S(RR). 8. Repeat steps 2, 3 & 4 for the left the height change by, 6. The stiffness of the left and right front, getting S(LF). Cont. on page 77

Rocker rear end (outlined) on Chuck Hallum's HRE car. Attachment Another view of rocker and chassis plates on HRE car. Large holes bolts (arrows) at rear moved to outside to reduce motion. for reduction of weight.

DECEMBER 1975 29 Big J-class boats racing at Pewaukee, Wisconsin. Real grabber of a photo was taken by Catherine Millican.

• Our lead photograph this month is not of a sailboat. Indeed, I don’t know if this ever was powered with sail, but since the prototype was built in 1920, I would imagine that somewhere along By ROD CARR the way, somebody tried it. A t any rate, Ray Borden o f Model Services, P.O. Box standing him in good stead with the A t the present time, the J is not for 214, Farmingdale, N.J. 07727, was kind models. I would expect to see some new the novice skipper. The assistance you enough to respond immediately to my faces gathering J-silver next season, as get in outfitting the bare hull is almost request for information about his 42 model yachtsmen from other classes try non-existent, and one must call upon inch LOA Jersey Skiff. He sent sample their händ at this boat. Bud Salika has experience from other boats. If enough plans which he has told me will retail announced that the class has attained interest is shown, I would be willing to for $7.95. Full size templates make the the 20 boat registered minimum required provide a later column devoted to the hull job quite straightforward. As you for AMYA sanction. This w ill alow 1976 J-boat, but no interest, no column. So can see, it is an extremely realistic model, to have Divisional and ACCR events let me hear from you. and Ray took it to its ultimate end by under the AMYA umbrella. A t the present time, Don Schricker, putting the rudder servo inside the torso o f the fisherman. The hull is o f lapstrake construction and took 2nd place at the WRAMS R/C Show last spring. What a beautiful sight on the water. Of the many people and firms that I write to in trying to gather information for this column, Ray Borden deserves loud applause. His reply was quick, com­ plete, and to the point. This is a far cry from some of the firms (indeed, adver­ tisers in model magazines, some o f them) who answer their inquiries late if at all. I’m getting so disappointed at the track record that I’m almost to the point of putting out a list of all the manufacturers who have failed to respond. You'd be surprised at the folks who would make the list!!! * * * The next breathtaking sight is that of a fleet of J-boats heading for the weather mark at a recent contest held in Pewaukee, Wisconsin. My spies tell me that builder Chuck Millican won the Full width extruded aluminum trave,e' on Ro? Ca" ’s nati° nal champion Star « allows full event, his big-boat sailing expertise was control of main leech tension. W.H 9° "ush with deck next year. MODEL BUILDER 3 0 of California, holds the record, and is using 10 (ten) Fisher turnbuckles in an attempt to stay his limber mast in some sort of regular curve. Don, get yourself a nice, dry telephone pole and a spoke- shave, roll up your sleeves and get to work!!!! The boat really requires a careful hand, as it appears to be tender, much like the East Coast 12-Meter. Having built a number of sails for the J, I have adopted a form which leaves the upper third of the mainsail quite flat, while keeping the bottom full for power. The jib is kept flat in order to take advan­ tage of the pointing ability of the hull. We have six J’s in various stages o f com­ Ray Borden's Jersey SEA SKIFF, 42" long. Even the waves seem to be scale size! R/C model pletion between here and Richmond, and was displayed at the 1975 WRAM show. I would suppose that we will probably have some sort o f an event for them next year, maybe a Divisional, but only if we can hire a bull gang o f ex-Mr. America’s to help lift the monsters in and out of the water!!!! * * * As of this writing, I have heard noth­ ing concrete from the Dumas folks about their plan to put out a fiberglass STAR 45. The man in charge of the STAR 45 Class for AMYA is the 1976 Class Secre­ tary, Dave Holmes, 77 Stephen Drive, Pleasantville, New York 10570. The final decision as to how AMYA w ill react to changes in the boat resides with him, so talk directly to him, not me. I have heard of a couple of other folks who have voiced interest in a ’glass STAR hull from a production standpoint, but Continued on page 68

Another view of Borden's SEA SKIFF, showing excellent scale details. Fishing pole apparently doubles as radio antenna.

r m Athwartship I plywood brace

Full view of Carr’s champion Star 45. Is it named after a dog? And if so, why?

DECEMBER 1975 31 FOUND PHOTOS BY FUDO TAKAGI By WALT MOONEY . . . Another 2-in-1 design from the King of the Peanut Gallery. Considering his ability to dig up unusual and rare aircraft, it is only natural that he should . . . er . . find the Found . . .

• I n Canada there is an aircraft company no struts on the Found, which makes ler hook and rubber motor. Use thin by the name of Found Brothers Avia­ for minimum aerodynamic drag. The sheet balsa to fill in around the win­ tion. Over the years they have produced real airplane has a propeller spinner, dows. some very fine utility aircraft. They are shown in the top view, but not included The floats have a single top keel, ten true “ Bush” airplanes, and as such, have on my model for simplicity (Some of the formers, and are covered with sheet balsa. been convertible to both skis and floats. scale points were lost this way, no A single sheet o f three inch wide balsa This model is particularly suitable for doubt.). will just cover the top o f the floats. The a seaplane .. . capable of taking o ff from There is nothing new or revolutionary floats have block balsa noses and sheet the water unassisted, and putting up in the design or building o f the Found, metal water rudders. good duration flights. The model in the so other than describing the structure We used a seven inch diameter Peck photo was drawn up on a Monday, and of the various components, we won’t Polymers plastic prop, a ballbearing flown in the Flightmasters seaplane con­ go into a step by step "how-to-build-it” thrust washer, and two o f their nylon test on the following Sunday. It flies as article, but will put more of the article thrust buttons . . . the last items to be well as any other rubber powered sea­ into a “ let’s-try-to-fly-seaplanes” effort. sure o f a consistently aligned prop shaft. plane I have seen, but in a single week The wing is a conventional stick-and- For the large model, drill out the thrust of evenings, the scale details were rather tissue structure, using notched ribs, three buttons to accommodate the shaft wire. stark and the model only made it to spars, a leading edge, trailing edge, and All parts o f the model are covered second place. tips. The real airplane has dihedral breaks with tissue and doped until they are The Model was purposely designed about half way out the semi-span, and water proof. I suggest several coats of with a wing span o f 26 inches so that so does the model. dope all over the uncovered fuselage Bill Northrop of MODEL BUILDER The tail is also conventional and sim­ structure to prevent it soaking up water could shrink it down to Peanut size for ilar to the wing, except that both the when it gets dunked and the nose plug the magazine. Because it is difficult to vertical and horizontal tails are built comes out. come up with Peanut Scale ripples, I flat over the plan, without the spars, The floats are held parallel to each suspect the larger model will be the more and the spars and rib pieces are added other by hardwood spreader bars. These successful seaplane, so details have been after the flat surfaces are removed from penetrate the skin of the floats and butt added to the plans for a landplane pea­ the plans. A spar on both sides tends to against the keel. This must be a water­ nut version. reduce warping tendencies. Sandpaper tight joint. With the exception o f the floats, is used to obtain the cross section desired. The landing gear wires are cemented which are round topped, the only other The fuselage is a simple, built-up box to the fuselage structure at their upper area o f the model needing countouring structure. Sheet balsa is used at the tail ends, and are attached to the spreader is the fuselage forward o f the windshield. cone area to support the tails. Four bars by wrapping with thread and ce­ The engine cowling and nose block is blocks of balsa provide the nose con­ menting. Add strut fairings and the di­ carved from block balsa. Except for tours. Remember to hollow out the top agonal struts. landing gear or float struts, there are block to allow clearance for the propel­ Note that the rear motor peg is not

3 2 MODEL BUILDER Walt's 26 " version of the Found shortly after an easy takeoff from The Found on a takeoff run. It becomes "unglued" w ith only a the waters of Mission Bay. Dan Diego. moderate amount of power. very far behind the trailing edge of the them with slightly larger rudders. to take o ff, or even if there is just barely wing. This was done because it’s amaz­ Now try a full power takeoff. If the enough power to take o ff, the chances ing how much rubber it takes to R.O.W. model takes off, WOW that’s great! And are the model will tip over most o f the a seaplane model, and i t ’s important to what a lot o f fun! time. This is because of the non-scale have the rubber C.G. close to the flight If the model taxis real fast and looks water. It has waves that are too big and C.G. Otherwise you have to reballast the like it might take off, but doesn’t quite surface tension that is too strong . . . the model every time you increase the make it, add another loop o f rubber not much can be done about that... engine power. and try again. except more power to get o ff faster Now, let’s try to fly Scale seaplanes. If the model noses up and drags the and miss that rogue wave. First, a seaplane ought to take off un­ aft end o f the floats in the water, the The power required to take off will assisted. In fact, at the Flightmaster’s C.G. is probably too far aft relative to the vary depending on where you fly. For seaplane contests, unassisted R.O.W. step. Ballast the nose to move the C.G. instance, the model in the photos re­ is required. To do this successfully re­ forward and add up elevator to main­ quired 10 strands o f the brownish Sig quires several things, as follows: tain your flight trim. contest rubber to take o ff at Lake El­ 1. The model must float and not get If the model taxis at a high speed sinore (altitude 1250 feet) consistently. water logged. with a very flat attitude, with the aft Whereas, it jumps o ff every time at sea 2. The model must taxi in a straight end of the floats out of the water, you level with eight strands. line, thus the water rudders are essential. have the opposite problem and should It w ill actually get o ff at Elsinore 3. It helps if the spray from the floats use the opposite cure. It is not unlikely on eight strands, but not consistently. doesn’t hit the propeller, so add the that the model w ill do this very long, The taxi runs are about twenty five feet spray dams, made from thin plastic, to because it has lost the stabilizing effect long and all the little variations in the the inner side o f each float nose. o f the water rudders, and it will also surface o f the water tend to dunk the 4. Have the C.G. in the right place. tend to dig in the nose o f the floats and model about 50% o f the time. With the It should be just forward of the step. tip over. bigger motor, at least 95% o f the takeoff 5. The model must be trimmed out In fact, if you have too little power Continued on page 85 to fly nicely, it must climb straight, or in a very wide turn. 6. It must have enough power to take off, and it ’s even better if it takes o ff quickly. All of the above items are important and have been observed to be important over years o f observations in flying both models and full sized seaplanes. Test glide your model until it has a reasonably straight glide, and will land in the water safely. Try low power hand launches until you have a good climb that is also fairly straight, use thrust line adjustments to obtain this. Now try some moderately wound taxi runs. Be prepared to get the model quickly if it dunks so it doesn’t get a lot of water in it. If the model turns much in taxi mode, bend the water rudders to straight­ en it out. Bend the rudder on the float towards which the model tu rn s. . . the other float will be tending to lift out of the water and its rudder won’t be very effective. If the model turns incon­ sistently, that is, in either direction, bend both rudders inward . . . or replace

DECEMBER 1975 33

Marty and Howard Phillips (left) loading up their model aircraft trailer. It's designed to hold a R/Cer Brian Dickerson looks over a Ukie ship. wide variety of planes. Note .020 Payload strapped down with C/L ship. Norm McCreight helps. What's he thinkin'? Dirty Dan tells all!

______

By "DIRTY DAN" RUTHERFORD 1 ontrol line PHOTOS BY THE AUTHOR

• You almost missed last m onth’s col­ racing. Brian can hold his own with and took the picture. The obvious, an umn. And, with such choice bits of most anybody when it comes to flying R/Cer holding a Combat plane, is not prose like the “ Ballad o f the Folken-A,” R/C. So he is good in R/C, what does the important part o f the picture. The that would have been a shame. that have to do with C/L? Good ques­ important part is something not visible, When I was first talking to WCN tion. Keep reading and you will find and that is what thoughts are going about doing the C/L column, he made it the answer. through Brian's mind as he looks over clear that deadlines were to be met when Brian occasionally stops by the C/L Gary’s plane . . . submitting material. I assured him that area to B.S. and listen to honkin’ en­ “ Gad, these C/L guys have really got I could meet deadlines w ithout trouble gines (“ Golly shucks, how do you guys their act together. Their engines run and that this would not be a problem. make your engines run so good?” ). On like Jack the Bear, they never have Last month’s column went together pret­ the day that this picture was taken, trouble getting them started . . . even ty easily and I told Bill that I might Gary Stevens and I were out testing without electric starters, and their nee­ even have it to him ahead o f schedule. new Combat planes. Tilings were going dle settings always seem to be right on. He said that was fine, but that it might well and Gary put up some good flights And this plane! Wow, how can they be quite a shock to have something come after Brian arrived. We were packing build planes so light and still have them in early and that it might get lost if it up to go and I noticed Brian holding stand the stresses they put on them? was early. Huh?! one o f Gary’s “ Tyrantulas” and giving “ Wish I had a straight edge. I don’t As it turned out, I didn’t get the it a good hard look. I couldn’t resist ever recall seeing a wing as straight as column in early, but I did mail it on time, so it wasn’t late. Then 10 days after the deadline I got a call. They couldn’t find the column! I called back the next day, expecting to get chewed- out for missing a deadline. But they found it somewhere . . . In some forgot­ ten waste basket, no doubt. Submit the material early, it might get lost. Submit it on time, it might get lost anyway. Submit it late, you’re really a bad guy. Sigh. So it goes. (Boy! The things we let him get away with! wen) As long as most o f the pictures used in this month's column are ones I took, I am going to give you a little back­ ground on one of them. See the guy kneeling and holding a Combat plane? That is Brian Dickerson, one of the more active R/C fliers here in the N.W. Brian flies most all manner of Sport R/C planes and also does some Half-A, Dan's flying partner, Gary Stevens, holding up one of his "Tyrantulas," a Phil Granderson Quarter Midget, and Formula 1 Pylon design. It may be kitted soon.

36 MODEL BUILDER "Deck hand" Howard Phillips removes son Marty's Profile Carrier after another win. this one. Kind o f looks funny not having any warps like all of the planes in the Rod Lammers and his ST X-15 powered Good­ R/C area.” year. Rod's top Senior for this event in N.W. “ I should drop R/C and get into some serious C/L flying. And I would if I In 1/2A Combat, it was Rich “von” thought I could handle one o f these Lopez in first, followed by Edmond L. Clarence Haught, a busy N.W. modeler, w ith planes, but they go so fast and turn so Bridant, Norm McFadden, and Andy his stunt ship. Lookit all them ribs, man! tight I ’m sure I would crash. My reactions Prior. Tops in A Combat was Edmond that the competition is easy in WAM are geared to semi-responsive R/C planes. L. Bridant, with Rich “ von” Lopez in Combat, making it easy for “ Fast” These C/L planes move when you do. second, and Jeff Skalisky and Drew Eddie to dominate, here are the total Must be a neat feeling to have your Lance III in third and fourth, respec­ number of fliers that accumulated points plane instantly respond to every move tively. BC Slow Combat Champ is Mike in each category: In 1/2A, 18 people of your hand. Spindler, followed by Edmond L. Bri­ received points. In A there were 21, in “ Yep, I really should step up to C/L dant, J eff Lung, and Jeff Skalisky. BC BC Slow, 36, and in BC Fast, 49. Lots flying but I don’t think I’m good enough. Fast Combat was won by Paul Klahn, of fliers means stiff competition. I’ll Better stick with something I am pretty with Edmond L. Bridant second, Drew bet Bridant worked hard for all those good at already. Guess I’ll wander on Lance III third, and Rich “ von” Lopez trophies. over to the R/C area to see who is in fourth. The 1976 Control Line World Cham­ boring who with w h a t. . . all the spec­ In Top 15 Overall, Edmond L. Bri­ pionships will be held in Holland next tators are over there now anyway. Funny dant, Rich “ von” Lopez, Drew Lance III, year, and we have a strong team to how the crowds move to the R/C area and Mike Spindler head the list. represent the U.S. in Stunt. Gene Schaf­ as soon as the C/L guys pack up . . . Notice that “ Fast” Eddie Bridant fer, after a bunch of second place fin ­ And move right back when these guys placed either first or second in 1/2A, ishes, (second in ’71, ’73 and ’74 NATS, start flying Combat.” A, BC Slow and BC Fast. He must be second in ’73 FAI tryouts) put it all Hullo, Brian ol ’ Buddy. Told ya’ I some kind of mean Combat flier to together and is the No. 1 man on this was going to do a little write-up on you place so high in four different categories year’s FAI Stunt Team. Backing Gene for MB. Little did you know what form of Combat. To keep you from thinking Continued on page 70 it would take! You are now the latest to know why most people call me Dirty Dan. * * * Last month I told you about Mid­ west’s new .049 Combat plane, the “ L i’l Snip.” Rich “ von” Lopez informs me that Midwest is also going to kit his design, the Class A “ Firefly,” and that the kits will be released about one month after the L i’l Snip. The Class A Firefly is designed for ,15’s and ,19’s and should be competitive in both WAM “ A” Combat with a .19 for power, and in FAI Combat with a .15 up front. Rich also sent along names o f the winners o f the WAM perpetual Combat Championship trophies. In WAM, they keep track o f the winners of each con­ test and at the end of the season, total up the points to determine the Combat Champ for each division. These trophies are awarded at the end-of-the-season WAM Parade of Champions Dinner. Here are the 1975 winners: Top club Dave Corey and Patty DeLaney preparing to pit Ken Ferris' Goodyear. She also flies Goodyear, was the San Francisco Flying Tigers. Slow Rat, and Slow Combat. Dist. XI V.P. Homer Smith, in back, helped with timing of heats.

DECEMBER 1975 37 "The view is great, Ted, but how the hell do we get out of here!?" The author's newest OPS powered car assumes a precarious pose.

By TED MACIAG TETHERED RACERS! PHOTOS BY AUTHOR Includes results of the 1975 A.M.R.C.A. Nationals

• The 33rd A.M.R.C.A. Nationals was blems with them during the day! The entrant would post a time and then held at the W hittier Narrows race track There were a lot of new faces at the try to come as close to the posted speed in August. race this year. Among them, Ray Yates, as possible, w ithout going over. Thirty-Third?. . . Dang right, sonny, who is a dried-out R/C boat man, and I took so much time building my we’ve been around a long time. Model Greg Parsons, who was a motorcycle OPS car that I wasn't able to complete race car progress paralleled and often fanatic before he was bitten by the car the 2.5cc car that I hoped would give led the airplane branches o f modeling in bug. Roger Phil lips came from New York the smaller European cars a run for their the late thirties and forties. The hottest to run his Arrow with electronic ignition. money. The car will use an H.G.K. 15. engines (McCoy, Dooling, and Hassad) Capacitor discharge ignition systems are The H.G.K. is ideal for a car or boat, were designed by car enthusiasts. With the way o f the future for speed events since the front and back plate are revers- cars regaining their place in the modeling and will add considerable power to the able, allowing the exhaust to come out world you can look forward to them ignition engines in the old timer events. the same end o f the engine as the crank­ leading racing engine development in Mike LePurage was running cars before shaft. Preliminary runs on a propeller the future. As I was saying, the Nationals WW II and he was out running at the show it to be rather touchy, but very were held in California, and won by ’75 Nationals with the same cars! See, I hot. More on this when I get it in a car Garold Frymire. He pulled out a win the told you they never wear out! This in­ and go after the European Rossi’s and last run o f the meet, after helping every­ cludes the cars and the people. homebuilts. one else running Fry pan cars to go A new event was tried out this year, SPUR CARS faster than ever before, and rebuilding to give the people with cars that were The most unusual o f the tethered his own cars each night after many pro­ not competitive in their regular class. race cars is the “ spur gear” car. More

A Borden spur car, as described in the text. Looks like a fish that got Mike LePurage , left, looks over the spur car he designed 30 years tired of swimming. ago. And that's the real Dick McCoy on the right!

38 MODEL BUILDER A McCoy spur car. Interior details of a Borden spur car. spectators are interested in these fish­ The first car to reach 100 mph was the the power of the engines than bevel like cars than any o f the others. Using Mattews spur car. Following the war, the gears, in the usual spur gear arrangement spur gears allows the engine to be laid spur car and engine designed by Dick the gear is bolted directly on the crank­ down for a more streamlined shape. The McCoy held the records at around 112 shaft o f the engine, when the car is tear-drop shape was developed as the mph. Many other designers tried the running, the side loads o f the spur gears most efficient design. The components flattened fish-like la yo u t. . . the most are transmitted to the engine, and dis­ are crowded in the body shells that are successful o f these was the Borden. This torts the case which, slows the engine usually made o f sand-cast aluminum. In car was made as small and streamlined down. With the modern, high RPM, low the traditional layout, the cars are front as possible. The mounting lugs and cool­ torque engines, the slightest drag is res­ wheel drive and bridled so that when ing fins were turned o ff the engine to ponsible for a large loss in speed. Clamp­ they are running, the outside wheels are cut down the frontal area, and fit in ing the front plate o f the engine directly lifted o ff the ground and the car runs the small pans, crowded in among the behind the gear helps, but in the early on the two inside wheels. Notice that ignition system and fuel tank. The en­ fifties, when the bevel gear cars were there is one large drive wheel and the gine was mounted by the front and back running 150 mph, the spur gear cars others are streamlined. Often, with a plates. The fastest that a spur car ever were no longer the fastest cars on the good running spur car, the rear end of went in an official meet was 147, by a track. the car is also in the air, so the car is Borden car. Now the gears are grinding... not going around on one wheel! To com­ Sooooo, if the spur car did so well in the car, but in my head. What would plete this strange picture, the car appears why didn’t it continue to out-perform happen if you used the efficient hex to be running backwards, or blunt end the more conventional cars? Theproblem Continued on page 74 forward, rather than pointed end for­ is in the drive system. Though the spur ward, as they look like they should. gears are more efficient in transmitting The spur car was designed in the forties as the ultimate shape for speed.

George Bryant (left) and the fastest man, Ready-line of piped cars. The author, sweeping the track . . . oops, no, Garold Frymire. he's about to push o ff his .15 powered car.

DECEMBER 1975 39 . u . .

Winner in Scale Gas at the Flightmasters 1975 Annual was this 1 " scale BE-2E, built and flown by our own Fernando Ramos. Power is a Merlin diesel, turning an 8/4 prop. Look at that wing gap! Can't say they weren't working at 100% efficiency. FREE FLIGHT SCALE bvfernandoramos

• The 26th Flightmaster’ Annual, which which has to be one of the finest places new faces and new models, which in typifies the best in flying scale, was anywhere to fly scale models. R/C, U/C part, is the aim o f any model organiza­ another enjoyable and successful con­ and F/F scale can be flown, all at one tion. test. As per usual, the judging takes time, w ithout the least bit o f interfer­ O f the 65 models entered, the ma­ place on Saturday evening while the fly ­ ence with each other. On top of that, jority o f them were rubber powered, with ing is on Sunday. For the first time in there is a tall grassy area that is ideal for Peanut leading the pack. There is no 26 years, both the judging and flying test flying. Add to this beautiful wea­ question that rubber scale is fast be­ sites have been changed from the Los ther, and you have the ingredients for coming the favorite event for F/F scale Angeles area to Orange county. This an exceptional contest. modelers. . . not just here on the West year the new judging site was Trident I know that many of you prefer Coast, but anywhere that F/F scale is Jr. High School, in Anaheim. (Yes, I “ how-to” articles rather than reading popular. Why? I feel that there is some­ know, "the home of Mickey Mouse"!) about contests, so I’ll let the photos thing special about seeing a rubber pow­ The advantage to this change is that the speak for themselves. However, I would ered scale model take-off, and fly over­ facility at the school is much larger than like to point out a couple of observations head with the sun shining through the the one previously used, and there are that I made during the contest that may tissue, exposing the delicate framework plenty of motel accomodations for those interest you. The number o f entries this . . . all this with the absence o f noise. contestants who are from out-of-state year was down from previous years, and Cost is negligible compared to most or from San Diego county. The distance many thought that the change in loca­ forms of modeling, particularly R/C, for the latter has also been shortened tion was partly responsible for this . . . and most school yards can be used for considerably. I think not. The change is going to do flying. Yet, to the uninitiated, building The flying site was Mile Square Park, the club some good. There were many and flying rubber scale models, Peanuts

Walt Mooney releases his electric powered Skyraider. Difficulty of Larry Moss' P & W Longster makes beautiful takeoffs under electric adjusting thrust line makes trimming a bit tricky. power.

4 0 MODEL BUILDER included, is not easy. There are a few contestants whose models fly exceptionally well, with dura­ tion, but do not place. Often, these modelers let their feelings be known, but they forget that scale models must aJso score well on the static judge’s sheet. This is what makes rubber scale so difficult and challenging. It is not easy to build an accurate scale model with a great deal of detail, yet light enough that it can have good endurance. Workmanship also plays an important part in the total points o f the scale presentation. Too often, a modeler hangs everything but the kitchen sink onto his model, thinking that the judges will be impressed. Maybe so, but it is the Supermarine "Walrus", .15 powered by Bob Haight, of the Las Vegas "Vultures." way that everything is attached and finished on a scale model that reflects the workmanship. It is better to see a alistic take-offs regardless of how the There seems to be a divergence of rather plain, but cleanly constructed rest o f the flight may turn out. There opinion regarding the type o f design to model, than one that has every detail, were a couple o f unusual electric pow- use for electric power. Some like the but poorly done. wered models at the annual. One was a large, “ lots o f drag,” slow flying models, An excellent lesson can be learned Douglas Skyraider, entered by Walt while many prefer the very clean, low by these sullen contestants, if they can Mooney, which also took-off most re- drag types. Personally, I haven’t seen be given an opportunity to static judge. alistacally, but had difficulty in the flight too many scale electrics perform as well This way they will be able to compare pattern. The other was a WW I DH-10 as Mattel’s Super Star, for flight or du­ their workmanship with those of others. twin-engined bomber, built by Bill Stro­ ration. I’m sure that the added weight Maybe if more scale modelers were given man. Bill had a few problems during o f most scale models hinders perfor­ this chance, there would be less groan­ the contest and was unable to qualify, mance somewhat. ing and a better understanding. however, at a test flying session a week Now for a few comments about my Electric scale is drawing more and earlier, I did see the DH take-off and favorite event. .. F/F gas scale! I’ve said more interest. I keep hearing it ’s due to fly for a bit. Once the bugs get ironed it before, and I’ll say it again. F/F gas the fact that there is no mess to clean-up out, it is going to be something to see. scale, in my poinion, has to be the and no noise to speak of. One thing is The sound from a twin powered electric toughest of all modeling events. Many certain, electrics do make beautiful re­ is rather interesting, to say the least. Continued on page 85

"B rick" Brickner's .049 Rearwin Sportster, nicely detailed. No title necessary.

DECEMBER 1975 41 Latest wire wheels from Fulton Hungerford are stainless steel. To be in a variety of sizes. . . . being a collection of aeronautical crankcase drainings . . .

A LITTLE FRENCH LESSON there were some 45 models for the con­ “ Then a Martini was served, with • By courtesy o f Georges Chaulet, we test. plenty of peanuts o f course, and medals present a few abstracts from a report on “ It was a windless day, ideal for that and cups were given, with kits and sou­ a French Peanut Scale meet, which was kind o f model. The most remarked mod­ venir ashtrays. The MACNSE will or­ reported some time ago in the magazine el was Walt Mooney’s, with his radial ganise a new contest in spring, with a LE REDUIT D’AVION, which is the engine, detailed (Hungerford) wheels new category, a scale over one foot. oldest o f all aviation magazines in and “ without dihedral" wing and sym­ Let’s go to our building boards ..." France: “ If there is now more interest metrical wing section—but that flies!— LATEST “ GOOSE STEP” in scale contest, this is due primarily proxy flown by Jacques Laruelle. It seems our farewell to the "Spruce to the R/C and C/L modelers, for the "We had the feeling that everyone Goose” poem a couple o f issues ago was F/F scale contests are rather rare, and was happy with this good mood day. premature. According to a UPI release, the last one was organized by MRA in Contratulations to the jury members and billionaire Howard Hughes still has a 1968. Mrs. Pouliquen who worked at the re­ fondness for his huge flying boat, and "This contest was rather a test, be­ sults board. Continued on page 63 cause it was chosen the new but very interesting category of Peanuts. Scale models o f 1 foot span. The choice was done with the help o f Emmanuel Fillon, a passionate modeler filled with exper­ ience (let me add that Fillon is the ONLY FRENCH MODELER to have won the Wakefield Cup, around 1938 (1937, to be exact, wen). Organizers waxed the inscriptions o f contestants with some fear, because the enterings were somewhat impeded by the postage strike. Several scale models came from the USA, but unhappily only the RE- NARD R 17 from Walt Mooney (plane and glider pilot, great Peanut eater) came in due time. The other planes, from Warner, Hannan, Stroman etc. Travel Air “ Mystery Ship" built from a kit by Chris Fulmer, wife of Mike Fulmer, professional were stopped somewhere. But at last model builder. This was her first attempt at model building!

R/C contra-rotating rotor autogyro by Georges Chaulet, Antony, Bristol Brownie rubber powered flying scale model by John Blagg, France. It's one of a series ranging from small rubber powered jobs. England. Photo by Alan Callaghan.

42 MODEL BUILDER

Lee Campbell, Michigan, ready to launch Beginner's Luck, unlimited rubber ship des­ igned by England's Tom Stoker.

THE TWANGER TOW HOOK DECEMBER'S MYSTERY MODEL Last month, I ran a picture o f Tom Hutchinson's Twanger tow hook. Tom horn (the directions given are for models 4. Install all parts. Run all lines to had unlatched some of the mechanism that glide in a right turn). the auto-rudder and plunger setup. Fas­ from his circle tow hook and installed 2. The Auto-Rudder Plunger is iden­ ten the fishing swivel to one of the 1/16 the Danish ring system for his circle-tow tical to the one designed by John Clear, holes on the swinging arm. Fasten the glider. After some study and a great deal and featured in the September, 1975 split ring to the swivel. Adjust all set o f talking, John Lenderman and I sat issue of MODEL BUILDER Free Flight. screws, etc. down with a sketch pad and pencil and 3. The Twang hook itself is made up 5. Operation: All circle tow functions worked out our ideas for a simple circle- o f a spring of approximately 1/8 inside are directly controlled by the swinging tow system using the twang hook. The diameter (although this is not critical) arm. As the model is towed forward, “ three-view” o f the month details how to a length of about 5 inches (again not the swinging arm is pulled forward, which to build one yourself. All that is needed critical). Small diameter door closer sets the rudder in the straight position. is some very basic hand tools and a springs are acceptable, provided they As the towline is pulled down or back, soldering gun. will stretch out with about a 4 pound the swinging arm moves back and the I. The swinging arm is simply hack-pull and return to normal dimension. rudder moves to the circle position, with sawed and filed from a piece of 1/8 Cut the spring to size. Bend a piece o f the plunger being set to allow as much thick aluminum sheet. The appropriate hard 1 / 16 music wire to the shape shown. rudder throw as needed. When the mod­ holes are drilled. This assembly is in­ Insert the leg of the 1/16 hook into the el is ready to be launched, the towline stalled in the fuselage o f the g lid er. . . spring, about half-way, and solder the is tightened and the rudder straightens one inch in front of the center o f gravity. spring to the hook. This joint must be out bringing the model directly over­ The arm should be freely moving, but very well executed. Bend a loop on the head for release. firm ly anchored into the fuselage. A bottom o f the spring and run the tow- 6. Twang release: The towline is piece o f lightweight monofilament line line through the spring, tying it o ff at pulled down, extending the spring to its ( 10 lb. test or so) is attached to the arm the top and the bottom so that about a full 10 inches, and then the line is ab- and run through the fuselage to be at­ 10 inch length of line is in the spring . . . bruptly released, allowing the spring to tached to the left side of the rudder to lim it its travel. return to its normal length, which in DARNED GOOD AIRFOILS - MVA 123 and Go 495

STATION 0 2.5 5 7.5 10 15 20 25 30 40 50 60 70 80 90 95 100 UPPER 4.5 7.1 8.4 10.1 11.2 11.9 12.3 12.5 12.5 12.0 11.1 9.7 7.9 5.8 3.7 LOWER 4.5 3.7 4.1 5.1 5.9 6.3 6.7 7.1 7.1 6.7 6.1 5.5 4.8 4.2 3.5

------Go 495 — ------_ _ _ c ------

STATION 0 1.25 2.5 5 7.5 10 15 20 30 40 50 60 70 80 90 95 100 UPPER 1.15 2.8 3.5 4.55 5.35 6.0 6.95 7.7 8.55 8.75 8.35 7.5 6.2 4.45 2.45 1.3 0 LOWER 1.15 0.35 0.15 0 0 0.1 0.45 0.85 1.65 2.35 2.8 2.95 2.75 2.15 1.2 0.65 0

DECEMBER 1975 47 CIRCLE TOW FOR ALL OCCASIONS - o r - ANYONE CAN BE AN EXPERT IN A/1 & A/2

PARTS NEEDED: (Sketched fu ll size) SWINGING ARM: Made from 1/8" aluminum stock, 1.4" long and .4" wide. 1/8" Mounting hole drilled at top. Two 1/16" swivel mounting holes drilled at bottom. 1/16" Auto rudder hole drilled on right side (edge toward rear of model).

AUTO-RUDDER PLUNGER: @ Ora 1-1/2" Length of 2-56 threaded rod and two nuts. Spring from ball-point pen. Mounted in a 3/32" I.D. by 3/4" long aluminum tube. Solder wire to front end of rod.

TWANG HOOK: 1/16" Music wire hook bent as shown and inserted about 2-1/2" into a 1/8" I.D. hardware spring. Spring is 5 " long. Hook is soldered onto spring at top. Towline is run through spring and tied at top and bottom, allowing spring to extend to 10" length.

MISCELLANEOUS © PARTS: Fishing line swivel, 1/2" diameter split ring, turnbuckles, monofila-

OPERATION: Rubber band

The swinging arm is not under line TOW MODE: pressure by the tow line, so it moves GLIDE MODE: Under tow, the Auto-rudder is set for back which allows the monofilament In the glide, the twang hook is released straight ahead condition. The mono­ line to slacken. The rubber band and the plunger line is also released filament line is kept tight by line pulls the rudder to full right for circle. when the plunger release pin disengages pressure on the swinging arm, which The Auto-rudder plunger is set to under the fuselage. This allows the pulls it forward. adjust the Auto-rudder travel to the plunger to move to its glide setting. circle mode. 48 MODEL BUILDER Loren Williams and his "Stab? What's a stab?" biplane. One way to eliminate stab warps!

AIRFOILS - PART III Completing the series which began in October. The Advantages o f Flat Bottomed A ir­ Tom Hutchinson's Twanger Hook, shown one more time to illustrate text explaining operation. Also see sketches at left. foils: Not only do the Go. 795 and Go. 796 airfoils (see October “ Darned Good Air­ foils” ) offer advantages over those with camber, iudging from this test data, but they are also much easier to use. Proof of the latter characteristic is their general application in elementary models with their simple and strong construction. Ad­ ditionally, such wings possess inherent torsional stiffness. There is no need to remind anyone of the trouble which cambered sections cause in this respect. The center o f pressure travel is gov­ erned by the camber o f the mean line o f the airfoil. If the camber is small, so is the center of pressure travel. The air­ foils generally used for glider and rubber powered models have mean line cambers o f approximately 6 percent, compared with 2.4 per cent for the Go. 795, and 3.7 percent for the Go. 796. This means that for a given size o f tailplane, the moment arm can be safely reduced, Ted Stalick placed 2nd at Silents Please meet Bob Hunter demonstrates athletic prowess which in turn, decreases the moment with this Reid Simpson Jetex rocket model. required to launch an .049 Satellitel o f inertia. In other words, such models turn kicks the hook o ff the ring. When concludes this month, I thought it would will recover still faster from any dis­ the hook releases, the plunger release be interesting to give you two under­ placement. pin is pulled out, and the plunger is re­ cambered sections. The MVA 123 is one FLIGHT TESTS leased to its pre-determined glide setting. that I have used on the Auntie-Freez To test these theories, an A/1 wing The twanger hook and the above cir­ Coupe d ’Hiver, by Dave Linstrum. This was constructed using the Go. 795 air­ cle-towing system once again put A/2 is a slow high lift section, which because foil. For a wing chord of approximately glider into the class of the readily avail­ o f its thickness (or thinness), is ideally 4.4 inches, it used a 5/8 inch wide lead­ able. No longer do you need a machine suited to light, low powered ships.. . ing edge. Though not expertly finished, shop or many dollars to get competitive. such as the Coupe or the Jetex types. its performance was nevertheless up to You do, however, need to spend time The Go. 495 is a bit thicker and a bit present standards in all respects. practicing circle-tow, as it is the practice faster (notice the nose entry upsweep). For years, airfoils with straight or which makes the flier. You are also en­ Except for the thin trailing edge, this only slightly concave bottom surfaces couraged to read the recent series on section might be well considered for have been used for power models, and the development o f circle-towing in windy weather A/2, low aspect ratio they have yielded excellent results both Aeromodeller Magazine, written by El­ Wakefields, or Hand Launch Gliders. in climb and glide. The Benedek B ton Drew. The only problem with the thin trailing 8452-B, designed for use in power mod­ DARNED GOOD AIRFOILS - edge is structural. One could thicken it els, is almost identical to the Go. 795. Go. 495 and MVA 123. up slightly to reduce the warp probabi­ A radio controlled glider o f A/2 dimen- As part of the series on Airfoils which lities it has in its stock form. Continued on page 79

DECEMBER 1975 49 PHOTOS BY THE AUTHOR alaemdl holder! model tailgate Bob White, second in Wakefield in Bulgaria, at work on his model. Winding rig is a little different from Bob's favorite station wagon station favorite Bob's from different islittle a rig Winding model. his on work at Bulgaria, in Wakefield in second White, Bob o f our travel to and from the World World the from and to travel our f o Champs. Besides, it would be impossible impossible be would Besides,it Champs. cuaey ecie ut ht e i go did we what just describe accurately details the f o all through go won’t I • at the student hotel at various times. times. various at hotel student the at would that words paper on down put to a s a team member, may be just a little different.. besides, we promised equal time with the R/C report! R/C the besides, with promisedweequal time different.. as abealittle member, mayteam just of, ilr Siz ad r ad Mrs. and Mr. and Frank Smitz, myself, Willard were: Wolff, arrive to last The through. By DON CHANCEY . . . This event is being well covered by all of the publications, but Don's point of view, of point Don's but publications, the of .event isThiscovered . all . being by well CHANCEY DONBy aiming to do some coverage for Flying Flying for coverage some do to aiming 17th. the on begin to was contest the and 14th, the was date The Walters. Jim Canada's Andy DeMello, 52nd. DeMello, Canada'sAndy Models magazine and enjoy the contest. the enjoy and magazine Models now. close getting really was It 50 The team and its supporters arrived arrived supporters its and team The That night, Bob Hatschek showed up, up, showed Hatschek Bob night, That WORLD CHAMPS, F/F BULCARIA 1975 coverage, he launched all 22 Nordic Nordic 22 all launched he coverage, rbes Hs rvos xeine was experience previous His numerous on problems. out us helped and flights, That ist if he isn’t already on the Nordic Nordic the on already isn’t he if ist manager.That team future excellent an Hewould make team! the usand to invaluable his Hedid work! to him put We so. Not g fr cte. vroe a here was Everyone Scatter.” “ cover­ the do to for age ’clock o 10 or 9 around team (which is entirely possible!). isentirely (which team and of course, "Sarah” was there with with there was "Sarah” course, of and Dick Lyon’s son, Bob, Bob Piserchio, Piserchio, Bob wives, Bob, several son, included Lyon’s Dick list The now. o Davis. Jon h nx ngt Bl Hril ae in came Hartill Bill night, next The h floig w ad hl days half a and two following The Urs Schaller, Switzerland, placed 6th in power. in 6th placed Switzerland, Schaller, Urs around seven-thirty in the morning to to morning the in seven-thirty around once. We stayed a safe distance apart apart distance safe a stayed We once. the For night. seven at from or as six late practiced as We filled! really were u wud el K fu mnts” minutes.” four OK, “ yell would one usThen awhile. f o for around towed and seemed help­ that thing one but practice, beautiful. was weather the part, most This meant that we had four minutes minutes four had we that meant This at line the on be The Walters’. would Jim us f of o idea three an was ful for did teams two other the what know that is good practice for anyone. for practice is good successfully exercise isan that and This air. for, good into release look seriously to Everyone worked especially hard. I don’t don’t I hard. especially worked Everyone OE BUILDER MODEL

Dave Rounsaville was 39th in power. Echjenkov was 1973 Champion, from Russia.

“ FAI,” underneath it. About 2 floors down was a red banner with white letter­ ing proclaiming some sort of Bulgarian welcome (I couldn’t read it). Oh yes, back to the opening cere­ mony. We all boarded the red and white busses that were used to take those w ith­ out transportation to and from the field, Chow Hall, etc. Now they were taking us to some unknown destination for what we thought would be a normal, but enjoyable, opening ceremony. Boy were we surprised! We pulled up in this beautiful athletic facility and stopped in back o f the huge soccer stadium. The teams were asked to line up 3-abreast behind the flag and sign o f their country. As we waited to enter the stadium, the show started. First a Russian biplane made a low pass over the stadium, tow­ Pacel Dvorak was 1971 Champion, from Czec­ ing behind it two o f the most beautiful Bob Isaacson placed 32nd for the U.S. hoslovakia. Placed 48th this year. sailplanes I’ve ever seen. Next, two pis­ ton aircraft did a series o f slow graceful The Plovdiv town square was the ori­ loops, rolls, and turns. It was about this an hour or so before the game!). ginal site for the official opening of the time that someone noticed the plane The rest o f the ceremony included “ 1975 World Free Flight Champion­ now circling overhead at several thousand many speeches, fireworks, and flowers. ships,” but the Bulgarians decided that feet. We all kind o f looked at each other It was truly more than anyone had ex­ just wasn’t quite good enough. For the and everyone must have been thinking pected. last couple o f days, we had noticed that “ surely n o t. . . skydivers!!!” Well sure SUNDAY, AUGUST 17 the town had taken on some sort of enough, on the next pass, out came the The day started out perfectly. Winds change. There was just an air about test streamer. Then another, and another. would be light and variable with tem­ things. First there were a few scattered The d rift was almost zero! On the next peratures around 80° or 90°. There was posters around the town square. Then pass we saw them jump. A total o f 15 or a slight haze around the field (always!). more posters and signs with FAI, and a so skydivers jumped in all. As they came Chasing would be no problem, as average symbol designating where the proper down we were treated to a fantastic d rift all three days would be 1/4 to 1/2 routes were to the flying field and to display o f sky diving. The divers had mile, with only a few exceptions. the cafeteria. The next day, as we headed multi-colored flares attached to their The first round began at 8:30 a.m. for the field to practice, we saw large feet, which they swirled round and and saw our first man, Lyons, max easily. colorful posters (like 3x5 feet or so) of round while each just sort of “ sat” above Frank W olff was next and maxed, but airplanes and the official logo for this the stadium awaiting his turn to descend his air wasn’t quite as good. His flight year's contest. On the way back we on down into the center o f the soccer was about 3:05 or 3:10. The chasing noticed there were huge banners o f all field. All the people cheered. crew was on the ball, swinging jackets colors on both sides o f the streets. These Now, it was our turn. We didn’t really and sweaters wildly under the model, hung from almost every light pole on know what to expect. We then marched hoping to break loose any tiny bubble the main routes. Even the student hotel team-by-team, out onto and then around that would keep the model aloft just had a new face. First there was a huge the outside of the field. There sure were enough longer. It worked!! Later on, as banner right in the front of the building, a lot o f people (Plovdiv hasthechampion- many as 15 or 20 people could be seen hanging from the balcony o f the 7th ship soccer team and tonight was an im­ “ beating” under models 200 feet above, floor. The banner was white with a rain­ portant game. It seems the contest peo­ in obvious lift (seemed like wasted ef­ bow colored arc with two-foot letters, ple had sort o f borrowed the crowd for fort). Dave Rounsaville completed the

DECEMBER 1975 51 Mike Thomas, from Canada, placed 13th in Wakefield. Dick Lyons, placed 19th in F1C for the U.S.

The first round of the fly o ff started at 6:00 p.m. The engine run would be 8 seconds. Dave would fly in approxi­ mately 18th position and Lyons would go next to last. The models would be launched two minutes apart. Possible time to get them all in was 2 x 41 = 82 minutes. Dave’s model went slightly left at the top of the climb and did not transition properly. He was down at 2:49. Dick Lyons maxed as did 36 others. By now it was too dark to see the mod­ els for three minutes. The FIC fly o ff was to continue the next day after the F1A flyoff was completed. MONDAY, AUGUST I8 Today would be a carbon copy of the day before, except for late in the afternoon. Winds were light and variable until late in the 5th round, when they Bob Pesercho was Bob White's helper. picked, up slightly and the clouds moved Willard Smitz placed 37th in Wakefield for US. in. The glider team was out very early and put up one check flight on each of round with an easy max. their models. The flying order would be Back to Walters. Jim towed o ff to The next round was the same, except Isaacson, Chancey, Walters. Bob Hat- the right a bit and started circling close that Lyons had an overrun, but easily scheck would do all the launching. to a streamer. I kept him advised o f maxed on his second attempt. The third The flyers were ready!! The green other models and lift conditions around round was a copy o f the second. The flare went o ff and Bob was up on the him. After a few minutes o f circling the fourth round saw Lyon’s saved this time line. He circled up wind and o ff to the lift came and Jim was o ff. Within one- by an overrun. His ship was down in side. After 10 or 15 minutes, he finally and-a-half minutes I counted 32 models the crowd at about 2:10. The re-flight found lift and maxed. I was all hooked in the same thermal with him. was an easy max. It was time to break up and ready to go just as soon as Bob The next round was basically the same for lunch and we had all maxes so far. maxed. I had an easy time. I towed as the first. It was the third round that Then Lady Luck took her toll on Frank straight to the tip, circled once and spelled disaster for me. Isaacson maxed Wolff. “ zoomed” off into an obvious thermal and it was my turn to go. The wind kept just as Frank was about to put his marked by several models. The model shifting and I waited. Finally I towed model up for the lunch break, a Taft- got very high, D T’d and landed about up, circled a few times and spotted 3 or like Dust Devil ripped the model from 100 yards away. Now it was Jim Walters’ 4 models in obvious lift about 100 yards his hands. The body broke right in front turn. downwind. I circled downwind under o f the stab. Frank made repairs during I would run along with jim (as Jim the rising models, circled a couple o f lunch, the model was tested, and looked did later for me) as a trouble shooter. times to be sure, and decided to go. The OK. In the fifth round, a somewhat Probably 85% to 90% of the contest- model was in a fast right turn, setting less than perfect launch (too flat) spelled ents were equipped to circle-tow, and up for the "zoom ,” when Andy DeMel- disaster and totally destroyed the power conditions got extremely crowded and lo’s line wrapped around mine. Due to pattern. Frank was down at about 2:00. hectic at times (I had nightmares about speed I had already built up for the Dave Rounsaville had a real squeaker. line tangles the night before). I carried launch, the model quickly veered left, His ship hit at exactly 3:00! a knife to cut intentionally-crossed lines and Andy’s line caused mine to unlatch The 6th and 7th round went smooth­ or clear away the large weeds that oc­ prematurely. The model recovered very ly, and we had two in the flyoff... casionally snagged the lines. Many carried low to the ground. The result was a 92 Lyons and Rounsaville. The only prob­ scissors or knives. F1A was a crowded, sec. flight. There should not have been lem was the 38 others who also made hectic event with many, many line tan­ any problem, except that neither o f our the flyo ff. gles. Continued on page 56

52 MODEL BUILDER

Simple tow hook, with combined auto-rudder and "autos tab" line No, it's not a hand launch glider wing, it's "So I id if tier's" stab, show­ hooked up. ing the "autos tab" for calm weather towing. Good idea. who sees long hours of stick gluing lying IMPORTANT: BALANCE FINISHED inert in an embarrassing pile. 6. Either MODEL AS SHOWN ON PLANS. More scolding from older helper or, “ Hey models crash or fly poorly when this this mess will be easy to fix, mix the small point is ignored than most other epoxy.” factors combined. Drill holes in nose Stephanie and I have tried to make a and add lead fish sinkers to bring into “ kid proof” wing. There is no such thing proper balance. Stephanie got the bal­ as “ fool proof,” as I will attest by hav­ ance point as shown, removed about an ing hanging in my shop several aft parts 1/4 oz. sinker and coated over nose of fuselages, wings with no tips, wake- and sinkers with epoxy, which helps field props only 2 inches long, and flat keep fuselage from splitting during “ hard stabs... with polyhedral forcibly re­ landings.” Some of hers have approached moved. 90° from the horizontal. By using a piece of Sig 1/4 x 1-1/4 Now, with my preceding ramblings inch T.E. stock for wing L.E., and also concerning kids who run too fast during T.E., with a good piece of soft Sig 3/8 tow, there comes a time when even us X 3 inch wide balsa, a simple, strong, “ older kids” just aren’t as brisk. Have and efficient wing resulted. This wing is you ever tried towing on a hot day basically 3 pieces of wood, and 6 glue with no wind? Even worse, when the joints for the entire structure. Caution: wind shifts during two and even Foolish Use light 3/8 balsa for center and the Pleasure couldn't get one up over 50 ft. piece of T.E. stock for T.E., or wing After getting hit in the back by a tow- will be heavy. L.E. can be firmer balsa, line glider in a downer while running at but here again, not hard. The spruce my full speed (measured at something strip on L.E. will help keep down nicks. below the speed of light), I said to my­ Begin building the wing by making self, “ Big Daddy, there has gotta be a the w orld’s simplest wing jig. It con­ better way.” The little piece o f half­ sists o f a flat piece of 1/8 balsa 3 inches And here's Stephanie herself, w ith Stone Moun­ moon shaped plastic on the left T.E. of wide for the center section, and tapered tain in the background. Note sculpture at base. the stab I fondly call “ Autos Tab.” It al­ to fit 3/8 wing tips. Lay saran wrap over lows, during calm weather, a more lei­ it and place on table. Pin 3/8 x 3 x 30 thin coats of clear dope on finished surely tow and control by not having to long, soft balsa through 1/8 wood be­ wing. Due to her inexperience with a locate the tow hook too close to the neath, and into table. Glue edge of T.E. vibrator sander, she left a few pits and C.G. You may note that the left-hand stock to 3/8 piece to form leading edge. bad spots, so we elected to cover some inboard stabilizer is shorter than the Repeat for trailing edge. Trailing edge of her blemishes with a coat of tissue. right side. This is to compensate for stock is beveled, naturally, which forms This step isn’t mandatory, but in her added area o f the “ Autos Tab.” When undercamber o f a sort. For tips, repeat case it made a better looking job, al­ hitching up “ Autos Tab” for calm wea­ steps above except 3/8 wood is cut on a though a heavier wing, which is more ther flying, you will have to give a little taper before you glue on front and aft durable and less resistant to splitting left to the auto rudder, since “ Autos pieces. and warping. This extra weight in the Tab” tries to turn the model right under Stephanie sanded the lower surface wing caused her model to exceed 5.08 tow due to its rudder effect. Well built first, using a vibrator sander. A paper ounce minimum, and her “ SolídífIier” models are important, but flying makes towel, folded and slipped under the weighs nearly 6 ounces. or breaks them. Never test fly a brand sandpaper, will form curved undercamber The fuselage and stab is made exactly new model on a windy day. Try to easily. Upper surface is formed using like a hand-launched glider. The fuselage launch over a grassy area with more vibrator sander with spanwise strokes. is 1/2 inch medium balsa, and the stab shock absorption than a concrete run­ Make 1/16 plywood templates o ff the is 1/8 light balsa. Shape the stab exactly way. In a battle between concrete and plan to check sanding progress, and like a H.L.G. wing. It too may be tissue models, the present score is Concrete - avoid taking o ff too much wood and covered, along with 1/8 sub-fin. Make 10,526,421, Models - 0 . make flats in the airfoil. When center wing and stab mount from 1 /8 sheet and One small point to remember while section and tips are sanded to shape, glue on, along with dowels for holding flying A/1 gliders. Most people use the glue dihedral in. Stephanie brushed 2 wing and stab to fuselage. same tow reel and line to fly both A/1

DECEMBER 1975 55 it was not overcast and threatening rain. The temperature had dropped somewhat. The green flare went up and so did Bob and several others. Bob’s hook also came unlatched and he towed straight upwind as far as he could. He released the model in what looked like good air at first, but the ship was down in 2:08. So much for that. There were only two who made the 4:00 max.; V. Tchop (a 21 year old Russian, currently in the m ilitary), and Peter Allnut (a retired Canadian airline pilot). They were to meet head-to-head for the World Cham­ ·» pionship. When the green flare went up, so did Allnut. He towed straight to the top and let o ff in what he later said felt like good air. He was down at 131 secs. In the mean time, Tchop had gone up­ wind some distance and found, o f all things, a thermal! He made a beautiful the " "zoom ” launch and the model gracefully floated out towards the horizon. It was ALL NEW still at least at towline height when it DT’d at 5:00. He was truly the cham­ pion! K & B .35 Despite having the individual cham­ pion and the team championship, the “Series Russians did have their share o f bad luck in the flyo ff. Andres Lepp (designer 75 ” o f the first tension release towhook) This All New K&B .35 is specifically designed for all AMA had his No. 1 and No. 2 models run Classes of flying where a .35 standard plain bearing engine over by a car! Using his No. 3 model, he still placed 10th. W.l. Isaenko’s mod­ is required. The superior performance of this engine will fulfill el was also run over by a car when it everything demanded of it in the most competitive U-Control landed on his fly o ff flight! He placed Flying ... and make you an ACE among your competitors. 15th. TUESDAY, AUG. 19th O th e r features include: Wakefield was today, and still no “ SQUISH BAND” HEAD Like all K&B engines it is tops in its power winner yet! The day started out provides maximum power for size class...you can depend upon it for exactly as the others had ... beautiful. of engine. power, performance and durability. SAFETY CRANK STUD The flying order for today would be: practically eliminates the possibility See the K&B .35 “ Series 75”, now, Smitz, White, Davis. This changed from of breaking or even bending the at your favorite hobby shop. time to time due to broken motors, etc. crankshaft. The first two rounds went smoothly. Send tor your K&B Catalog, “Matched Finish We had all maxes so far. Willard was S y s te m ” Handbook and Super Poxy Paint chart. flying a relatively new model with a Include 25( to cover postage and handling. lot o f John Gard influence. It had an Address to Dept. MW-3. excellent glide (even though un-turbu- lated). aurora hobbycrafts Smitz and White maxed in the third DIVISION OF AURORA PRODUCTS CORP round but Jon Davis was a bit short on 12152 WOODRUFF AVENUE, DOWNEY, CALIFORNIA 90241 time and got in the air very near the end o f the third round. The result was allO sec. flight. and A/2. The line weight and drag re­ take the flight over! On the first flight o f the 4th round, quired by heavier A/2 can be reduced In the meantime, Walters got his max. Willard's model climbed very high in by using 6-10 lb. test monofilament The 4th and 5th round was all maxes good air. It seemed there could be no fishing line. You will have a better for the team. Bob and I maxed easily in way not to max. At about two minutes, chance o f getting ’em to the top of the the 6th. )im Walters hit trouble then, the model started stalling violently from line, and reduce wing breakage as well. when the latch on his towhook suddenly the lift. It stalled into the ground at I’d rather break a line than a wing. opened. The model came o ff the line 178 seconds. White and Davis had re­ Stephanie’s “ Solidiflier” is a real fun and was down in just under 2 minutes. latively easy maxes and we broke for model, and maybe when she learns to Isaacson was the only one left with all lunch. tow as good as most o f you, it will be a maxes. competitive model. Will be glad to hear Round five saw trouble again for from you if yours is fun to build and The 7th round went very smoothly Willard. Down in 123 seconds. Davis fly. A ny model you enjoy is successful. and we all maxed. All attention was then and White continued to max. The sixth focused on Bob Isaacson and how many round found Willard at the end of the others would be in the flyo ff. Would round and running out of time. He F/F Champs.. Continued from page 52 you believe 40? launched just as the round ended. With timers would admit that we had indeed The flyoff was to start at 6:30. The very little thermal help, the model still crossed lines! We were not allowed to weather had changed considerably . . . did 173 seconds! Jon Davis put up a beau-

56 MODEL BUILDER 'MAGNIFICENT STINSON RELIANT] If you’re a Sport Flyer, if you have a feeling for Scale, if you a«6* love R/C; then this is your ship. It’s a beautiful machine that builds easy— it’s rugged (look at those frame photos), loads of room— and flies great— and can be built for Control line also. The K it’s a real jo y — Top grade sanded— density Selected Balsa. Die Cut & num­ bered parts make assembly swift & sure with Step by Step plans. Formed gear— Alum en­ gine mounts— Scale decals— all linkage hardware: pushrods, A REAL CLASSIC BEAUEY aileron & elevator horns, bell- cranks— clevis, connectors, etc.

Beautifully detailed rugged KIT FS33 Plastic Cowl, Wheel pants— Strut fairings— and much more — See Your Dealer. 54·95

SPAN: 57-9/16" LENGTH: 38" ENGINE: .40 to .56 SCALE: 1-3/8" =1 FT. OPERATING SAILING MODEL

STARFISH

This little beauty will CHECK THESE EEATURES warm the heart of any • PLASTIC MOLDEO HULL • OIE CUT MAHOGANY CABIN sailor, large or small. • OIE CUT FRAME • OIE CUT PRINTEO PLANKEO It’s an excellent sailing PLYWOOD DECK model. Hull design and • SAIL CLOTH • METAL FITTINGS long keel & ballast pro­ • RIGGING COROAGE • METAL RUDOER vide excellent stability • MAST I BOOM MATERIAL • METAL KEEL WITH LEAO BALLAST in the water— And • STEP BY STEP PLANS ANO it’s equally pretty INSTRUCTIONS • SAILING TECHNIQUE ON PLAN on the mantlepiece. • BASE SHOWN NOT INCLUOED HEIGHT 203A " LENGTH U W BEAM 3Va KIT B-25 STERLING MODELS · 3620 G ST. PHILA.. PA. 19134. II no deal« available, direct orders accepted —with t(K additional charoe lor handling and shipping 160« minimum in U S . St 25 minimum outside U S ) Π Catalog o< entire tne of airplane control ine model kits R/C scale and Tram« kits, boat model kits, accessories, etc 50« enclosed □ Secrets ot Model Airplane Buildng Including design. conseuc- len, covering finishing. Hying, adjusting, control systems, etc 25« enclosed 3 Secrets o( Coned Line and Carr« Flying Indexing prettght. soloing, stunting. C arr« rules and regulations Cam« Hying hints and control line installation instruct kins 25« enclosed No checks Only U S money ord«s or currency accepted Name______Address ______City ______State ______Zip 280. Then we noticed the North Korean W rite For FREE BROCHURE ship was still up. We were all worried then. Sure enough, Paik Chang Sun’s On Our Complete Line Of model hit the ground at 303. Bob White had won 2nd place though! A truly fine R/C PROPORTIONAL EQUIPMENT performance. in c lu d in g The Team Championship was also won by the North Koreans, who had WORLD S SMALLEST SUPERLIGHT placed 1st, 4th and 34th. The Polish team was 2nd, and the Canadians were DIGITAL CONTROL SYSTEMS third. The U.S. team was 6th. SMALLEST SIZES LOWEST PRICES Back to the power flyo ff. Twenty flyers were left now. The engine runs 13400-26 Saficoy Street would be 4 seconds. Most all of the models performed beautifully, but na­ North Hollywood, Calif. 91605 turally only 3 could be winners. Lars Phone (213) 764-1488 Olofsson, of Sweden, won. Verbitzki of Russia had a short motor run o f 3 sec­ onds and still came in second. Burns of Canada was third. Our man Dick finished EXCLUSIVE U.S. DISTRIBUTOR an impressive 19th. Dick had put in a Rossi engine really good effort! It was now over, and all-in-all, it had been a great contest. NEW INNOVATIONS 15/RC I didn’t see very many new things. LIST PRICES: DEALER INQUIRIES Denmark’s Tom Koster was still working fl I V ® INVITED with his Flapper. He was flying a straight- STANDARD ENGINE V up power pattern. About one second before the engine cut, he would put TUNED-PIPE ENGINE down in the slab to point the nose level. Then the auto-rudder and stab kicked R/C ENGINE S83.95 in as usual. When it worked properly it was quite spectacular. In fact, it went beautifully in practice. It seemed to me Bill's miniature engines that Koster, as with the other Danes, tried to “ over-trim.” They looked great 1325 CAROL DRIVE, MEMPHIS, TENN. 38116 (901)397-0484 for a couple of flights. Then they would change something and "stack in.” Koster tiful max with what seemed like little ef­ climbed them all. The air was decent, busted up his only remaining ship test­ fort. Not so for Bob White. He had to do but it wasn’t an “ up-and-away” type ing before the first round. He repaired it the hard way . . . another flight that thermal. Bob’s model hit very close to it and maxed just as the round ended. landed at exactly 180 seconds! Re­ the 4:Q0 min mark, and less than 100 He wasn’t so fortunate in the second member Dave’s 4th round power flight?) yards from launch p o in t.. . but it had round. A 25 second flight spelled the The chase crew and supporters really maxed. A t this point he could place no end of the day for him. I think I heard worked hard swinging blankets, umbrel­ less than 7th because that’s all that were him say that he was finally going to las, and jackets, and if nothing else, left. abandon the “ Flapper." just wished the model up. What ever As Bob readied old No. 7 for the next Verbitzki, o f Russia, had, in my they did, it worked. flyoff round, it started to mist slightly. opinion, the most consistent model on Here we go, one more round. Willard Several o f us held umbrellas, etc. over the field. It had a cowled Rossi (as did put up his prettiest flight of the day. the model to protect it from the falling all Russian ships), and the entire airplane jon Davis launched into air that wasn’t moisture as much as possible. Again, was absolutely beautiful. He’s really a quite as good as we all thought it was. the green flare went up, signalling the hard worker. Cowled engines were very He still almost maxed, dropping only start of the round, and again, Bob star­ popular. 16 seconds in spite of the bad air. ted winding immediately. This time, all Urs Schaller, Switzerland, had a beau­ And now, twice in a row, Bob White seven remaining models were launched tifu lly cowled model with all sheeted had put in seven straight maxes at the simultaneously. Again No. 7 outclimbed flying surfaces. It had a higher aspect World Champs. Everyone was happy for them all. The power was beautiful! But, ratio wing than most other ships. The Bob. He was in the flyoffs again! We again, all seven maxed. By now (in fact climb wasn’t spectacular (it was ade­ quietly waited to see how many others by the first flyoff round), Bob was out quate), but the glide was exceptional. would also be in the flyo ff, while Bob of good motors. When the model was Urs had really bad luck in the final readied his ship and gathered his thoughts. retrieved, he carefully inspected the mo­ FIC fly-off. His model was still several As it turned out, only 14 would fly off tor and found two or three tiny nicks. feet high when the busses pulled between for the Wakefield title. Just because These were tied o ff and the motor re­ it and the timers. The last several seconds there weren’t as many as in power and installed. of his flight could not be seen. As it Nordic, don’t think it was easy. It may Again the flare went up and all 7 was he placed 6th. have been the toughest fly o ff o f all! wound frantically and launched at very I didn't see any significant changes The green flare went o ff. Bob White close to the same time. This time, Bob’s in Wakefield. The majority o f fliers were started winding immediately, as only ship didn’t get quite as high as it had using winding tubesand winding without four minutes were allowed to get in the before. It still out-climbed the others, the prop. The Russians used a prop air. however. The crowd was cleared away guard and wound with the prop still By now it was overcast and slightly so that the timers could see every second. attached. cooler. Several models went o ff together, The ship hit at 4:41 (281) which was Maybe I’m just prejudiced because including Bob White's No. 7, which out- one second better than the Austrians I fly the event, but Nordic seems to

58 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER ANNOUNCING! MODELS' BUILDER SECOND ANNUAL INTERNATIONAL Parcel Post Proxy Peanut RUBBER SCALE CONTEST!

EVERY PEANUT MODEL, FROM NEAR OR LOCAL MODELERS WILL BE ALLOWED TO FAR, WILL BE PROXY FLOWN, INDOORS, BY ENTER, BUT THEIR PLANES MUST ALSO BE SOME OF THE U.S.A.'S BEST RUBBER SCALE PROXY FLOWN, AND NO VERBAL OR PHYS­ FLYERS INCLUDING WALT MOONEY, BILL ICAL HELP WILL BE ALLOWED FROM THE HANNAN, CLARENCE MATHER, BOB PECK, OWNER . . . ONLY WRITTEN INSTRUCTIONS FERNANDO RAMOS, BILL WARNER, AND TO THE PROXY FLIER, AS ALLOWED FOR MANY OTHERS. ALL ENTRIES. Open to modelers from all parts of the world... any nationality... any age... any sex... come one,come all!

AWARDS to include TROPHIES and MERCHANDISE . . . ALSO, a KRAFT RADIO SYSTEM to the GRAND PEANUT of 1976! (HIGHEST OVERALL COMBINED STATIC AND FLIGHT SCORE) Other prizes include such items as; Peanut Scale kits and materials, Astro Flight and VL Products electric motors. Brown Jr. twin and single cylinder CO2 engines, Uber Skiver knives and sets, and much more!

Contest Director: CARL HATRAK Chief Static Judge: RUSS BARRERA Competition w ill be divided into five (5) classes: Pioneer. Scoring w ill be based on the total o f each entry's static World War I, Golden Age, World War II, and Modern. There scale points (WO maximum) and flight points (100 max- w ill also be individual awards such as; most distant entry, mum). Static judging will be according to AMA Indoor best shipping container, entry most damaged in shipping Rubber Scale rules. Flight points w ill be the average o f the (Don't try hard for that one!), best entry built from Walt two best flights out of four official flights (10 seconds Mooney plans, best model by a female, best entry by any minimum, 100 seconds maximum). Ties w ill be broken by modeler under 15 years of age, oldest qualifying contestant, highest single score, or a fly-off. Number o f attempts to be youngest qualifying contestant, best biplane (Big John limited, subject to size o f total entry. DO NOT SEND UN­ Award!), best entry built from a Peck-Polymers kit, longest TESTED MODELS! A three-man ju ry w ill preside over all flight, most static points, plus a few surprises. decisions. SCHEDULE: Register by mail on or before February 1, 1976. Models to be on hand on or before April 1,1976. Contest to be held approximately April 15 to May 1,1976. Send in now for your registration form, which includes an entry blank, a complete set of rules, and other particulars. Write to: MODEL BUILDER PROXY PEANUT CONTEST P. O. Box 4336 Santa Ana, California 92702 USA DECEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 59 begins to turn again. Using this method, ** it is possible to make very significant, R/C ELECTRIC FLIGHT SYSTEMS yet safe gains o f altitude. Astro-020 •Patent Pending The Russian method of towing hand­ $20.00 (F/F) FROM over-hand, without a tow reel, seems to $23.00 (R/C) be the best way going. It enables the Astro-5 flyer to tow up-wind or down wind at (Astro Pup) $35.00 RSTRO FLIGHT IÍ1C. w ill. It is much easier to circle tow using Astro-10 $65.00 PIONEERS IN SILENT FLIGHT Astro-15 $75.00 13377 Beach Avenue this method than with a tow reel. They Astro-25 $85.00 Venice. California 90291 use a large diameter monofilament line that does stretch some for thermal flying. For flyoff situations, a very taut line with minimum stretch is used. ·

Soaring...... Continued from page 27 sheet foam with a hot wire. Injection molded wings are very strong, very ac­ curate to reproduce in quantity, can be made in any sort o f configuration, such as elliptical planform, and cost a couple o f hundred thousand bucks for the first set. If you want to make your own in­ jection molded foam wings . . . great! Send me an airplane ticket to meet you on the Riviera and we’ll discuss your project further. The rest o f you guys read on! Hot wire cut wings have the disad­ vantage o f needing to be cut in sections which have straight leading and trailing edges. But they can have progressive airfoil sections, wash-out and wash-in, and are dirt cheap! Hence our interest in them. I ’m not going to discuss the cutting o f foam wings in this article. There has been a lot written on the subject, and there are several firms around the country who will do the have undergone the most drastic change tow hook starts to move. To keep the job for you. Most clubs have two or of any o f the events. Almost everyone model from spinning down, washin must three guys already set up to cut a set circle-towed. Some used offset hooks be used in the inboard wing panel. o f cores for you. So, get a set o f foam and "shock” releases, but most used the It is'still a little bit tricky to fly. The cores by whatever means is handiest, Russian or Czech style tension release Russian method is to use an aileron then read on. hook. Wing structures have become ex­ (or flap) on the out board wing tip. The There arc three basic ways o f han­ tremely rigid, as have tail booms... flap is timer-actuated and kicks up dling wire-cut foam wings. One method the reason being the speed and pressure (washout) one second after release, re­ is to sheet the entire wing with either built up by the "zoom ” launches. mains up for 2-1/2 seconds, and returns balsa or plywood. This method has the The one new thing that impressed to neutral. The result is quite specta­ advantage of being very strong and the me most was the aileron used by the cular. Upon release, the model kicks disadvantage of being heavy. Many of Russians. It was used to make the zoom slightly over for one second, then the the current pattern airplanes are built safer and as a means o f getting even flap kicks up and pulls the out board in this manner.. . power fliers can tol­ more altitude. In most cases, a Nordic wing down, causing the model to climb erate a 24 ounce per square foot wing is banked into the glide turn by starting straight into the wind for 2-1/2 seconds. loading . . . glider fliers cannot! the rudder to move slightly, just as the When the flap goes down, the model The second method was devised by Hi Johnson, owner of Hi Johnson Model Products, Inc. He will be producing foam wings in the near future which are sheeted with a material he calls “ green skin.” This is a rubbery sort of styro­ foam sheetings which is lightweight and if· Afottocoupe strong. It is similar to the material that ·· WINGSPAN. 0*» POWER. *0 « BAOlO * "··< * * - 22 t/2* WINGSPAN FOR CONTROL UP TO THRCE CHANNELS is used for the molded trays that meat is f^gSJN 14 1/2 * ΛΙΝΟ SPAN. 020 POWER RUBBER. C02. OR 010 POWER A BIT A MAÖNlFICtMT RENDITION OF At* ALL-TIM« OF NOSTALGIA a n DA DEliOHt TO BUILD FAVORITE AIRCRAFT FOR PULSE A NO SMAU WUlTl packed in at the supermarket. It can be «7.« RADIO CONTROL UNITS CAN BE A TRUE CLASSIC FROM THE OOtOCN ERA · FLOWN FREE FnOMT ON RUBBER. painted, or w ill accept the low tempera­ KITS INCLUDE TOP QUALITY PRlNTEO BALSA. OECAlS, AND SUPER OCTAIL PI ANS ture iron-on coverings such as Flite-Kote, Solarfilm, or Kwik-Cote. The third method of constructing a SV WiNOSPAN. OA* POWER. FOR CONTROL UP TO THREC CHANNELS foam wing employs a full-depth spruce MAKER BEFORE WORlO WARM. or hard balsa spar, with conventional © ~ 6 Z $ 12.« M· WINGSPAN 0Ϊ0 //séfO&k L44€? sheet balsa leading edges to produce a POWER FF «« R/C ^ W ' ' ' “ D” tube type construction, similar to FLY LIN E MODELS conventional balsa structure. SEE YOUR LOCAL HOBBY DEALER* Φ 10643 ASHBY PL FAIRFAX. VA. 22030 Hi Johnson has developed a very 60 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER strong, lightweight spar/covering system for foam wings. Realizing the total strength in a spar system is in the tensile strength o f the spars, Hi decided to use "NEWS FLASH" 1/16 plywood strips for the spars. A 1/2 inch wide strip is adequate for almost any wing, providing a wide gluing sur­ face, phenomenal strength, and very light HP WINS AGAIN weight. This spar system, together with either Dave Platt first to fly a sheet balsa leading edge sheeting and cap strips, or sheeting with the “ green a R/C Ducted Fan Aircraft skin” foam plastic, yields a strong, in R/C Scale at the NATS lightweight, attractive . . . and most im­ portantly . . . an accurate wing. Next with th e ...... HP40R month we’ll cover the step-by-step pro­ cedures on building such a wing. FROM THE HANDY HINTS DEPARTMENT... I’ve found that hi-start rubber, which begins to get flaky and break after pro­ longed exposure to sunlight, can be pre­ served with a product that is used in the photographic industry to preserve rubber rollers in print processing machin­ ery! The product, simply called Rubber Preservative, is sold by Peck Sales Co., 7949 Laurel Canyon Blvd., North Hol­ lywood, Calif. 91605. To use the pre­ servative, wash the rubber with soap and water, dry with a towel, and then wipe the preservative onto the rubber. Repeat this process every three or four months and your hi-start rubber will last seem­ ingly forever. I’ve been using the same rubber for over two years without any signs o f flaking or tendency to break (Arm or-Allis more readily available, and should also do the job, but it more ex­ pensive. wen) y Cecil Cutbirth, of Rolling Hills, Calif, has discovered a skid material for sail­ plane competition that seems to work Dave says: "I have no doubt that ducted fans are the coming equally well on all types of surfaces. thing and the HP 40R will be a favorite choice for high power, Many fliers have been using foam rubber easy starting, good idle and amazing durability: even an insulation tape, but have found that it occasional lean run doesn’t bother it. I'm impressed!” won't work well on bare ground, where the layer o f loose dirt on top acts like ball bearings to propel the model for­ ward. Also, the foam doesn’t seem to AVAILABLE AT YOUR FAVORITE DEALER work well on wet grass. Cecil is using strips cut from a cheap rubber door / V MSOIIIMOOEl PRODUCTS mat. The mat has I/8 inch diameter v — A 4 6929 WEST59THSTREET · CHICAGO. ILLINOIS 60638 · (312) 536-7101 "fingers” which project up about 1/2 inch from the 1/16 inch sheet rubber base. A strip of this material can be A HOBIE TALE out yourself. And that is just what Kelly glued onto the bottom of the fuselage Kelly Pike sent us a report on the did . . . the afternoon before the contest. with Goodyear Pliobond or Wilhold Fix­ first ever Atlantic City Boardwalk Hobie And here is the gospel, as told by Pike . . . ture Adhesive, or can be held in place Hawk Contest. This contest, sponsored "I drove down to the beach site and with sheet metal screws. On asphalt, the by Coast Catamaran, was arranged by set up my high start. The wind was rubber is soft enough to provide great Kelly, who until very recently, traveled blowing offshore (that means the water friction to stop the model. On grass, the eastern part o f the U.S. promoting is downwind from the land), so it was whether wet or dry, the fingers grab the Hobie Hawks. Kelly enlisted the necessary to wade out into the surf about the grass, and on bare dirt the fingers support o f the Atlantic City town fathers 100 feet to stretch the tow. This also act just like a rake, bringing the plane to who also donated $350 for contest meant that the pilot was 100 feet from a halt in short order. As a fringe benefit, prizes. But even more interesting than shore. It was quite comfortable in the the door mat material doesn’t wear out the contest itself (which incidentally cool, waist deep ocean water, feeling as rapidly as the foam tape, and isn’t was won by Dick Pike, no relation to thesunon my back, 'just don’t drop the nearly as expensive as some of the other Kelly) was his description o f the prepa­ transmitter’ I told myself. skids tried, such as automotive timing rations. Naturally you can’t just assume "Now those of you who frequent the belts which sell for as much as $15.00. that because a site appears to be large movies or read the newspapers should Like the ad says. . . "let your fingers enough, that it w ill be suitable for a begin to recognize this scene. Here I am do the stopping.” ... Oooooooh! soaring contest. . . you have to try it splashing around in the Atlantic Ocean, DECEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 61 would suggest the turning of a hard­ CHICKEN HAWK wood master, and either heat or vacuum forming a cowl o f .010 or .015 sheet butyrate plastic. You can, o f course, oh a Seen, Sudyet 34/ 25" carve the cowl from a block o f medium 049 hard balsa. Paint the cowl the same as the struts or conjure up your favorite M IS TER E color. Engine details are on the plan. Some photos show a balsa prop, but this was replaced with a heavier Williams Bros, prop to add nose weight. Prop .1 5 -.2 3 was later painted with Flat Brown 1-2 Ch. All die cut parts, formed Testors plastic paint. dural gear. Simple Construction. Cut patterns for the stab, elevator and Proven Performer $15.95 The Gentle Intro to Multi. All die rudder laminations. My favorite form is cut, formed gear, aileron material. o f Bainbridge board, with the edges Another easy-to-build kit $29.95 Special SditioK “ΡΟχηλ lightly waxed to prevent sticking. As­ semble stab and rudder as per plan. Cover See your dealer or order direct. P O . Boi 2SS5. Sch#n#cUdy. N. Y. I2309 rudder with white tissue. My insignia was modified from that in a Guillows 18 inch D-8 kit, but may be cut from VL-101 ELECTRIC FLIGHT SYSTEM SIG’s black decal sheet. Featuring Make one master wing rib template HYTORK 48 o f 1/16th ply to cut all ribs. Maintain MOTOR & PLANETARY GEAR UNIT the nose contour and trim for the taper Complete flying weight 2'/S oz.------w ill power from the trailing edge. Block up the Models 25 to 50" wingspan weighing up to 10 oz. center o f the laminated circular wing Send 25É for Catalog showing com­ ~ . / cut-out 3/16 in., and trim center rib plete line of Electric Flight Equipment to fit. 'UJ and Accessories Perhaps the most time consuming VL-101 System $19.50; Hytork 48, part of building this model is the appli­ Prop and Instruction Book $9.00; Fast cation of the polygonal camouflage pat­ Chargers $14.50 to $29.50 tern on the upper and lower surfaces of See your Model Dealer or order Direct PRODUCTS (add 10% for Postage and Handling - the wing and stab. A reasonable sub­ DIVISION OF VISTA LABS Calif. Residents also add 6% Sales stitute for camouflage would be to cover % 7023-D Canoga Ave. Tax) send Check or M.O., No. COD's the top surfaces in green tissue and the w / Λ Canoga Park, Ca. 91303 Hobby Dealers send for Information bottoms with light blue. My process is as follows. Make a frame o f scrap wood approximately 12 by 15 inches and dope at a resort town, all by myself. Sounds dropped off, as glad to be rid of me as I on a piece os SIG’s lightweight tissue. a little bit like the movie 'JA IVS, ’ doesn’t was to be rid of her. Dissolve some blue food coloring in it? Now understand that I don’t recom­ "M y attention waned from the ‘vic­ alcohol and spray. When paper is dry, mend that you go see a movie like that tim ’ toe as I realised this epic battle remove and dope on a second piece. a week before planning to travel to the between man and beast had been w it­ Spray this with alcohol in which a few seashore . . . and I ’m the type o f person nessed from the beach by a considerable drops of Burnt Umber oil mixing color who can really become involved in a crowd, drawn together earlier by my has been dissolved. This should give a movie. loud shrieks of ‘Shark! Shark!’ Turning light tan effect which is used as the base "I had just launched the Hawk for to greet their growing laughter I revised camouflage color on top of the wing about the fifth or sixth flight when I my report with ‘Crab! Crab!.’ and stab. Bottom surfaces are covered felt a sharp pain in my foot. The pos­ “ This would be a proper ending to with the blue tissue. Use felt tip marking sibility of what this meant hit me im­ the scene if we were not left with the pens o f several colors to apply the pat­ mediately. I scanned the surrounding question, 'Where is the sailplane I just tern. If any spot becomes too soggy water and imagined a hundred sharks at launched?' No sooner thought than the stop, let dry and come back to it. This the edge of a frenzy bearing down on question was answered by the reentry is not super scale, so I eyeba'led the me. I could see tomorrow’s front page o f my forlorn Hobie Hawk, still attached shape of each patch of color.. Finish picture. . . a lone, tattered arm still to the towline, as it whistled into the o ff the job with one coat o f clear nitrate clutching a transmitter, washed up on beach. As the parts and spray settled, dope. Although somewhat tedious, the shore. I caught my breath and tried to I turned and submerged in the surf, results just might stagger the competi­ run across the top o f the water, pro­ making noises like shark bail. How would tion and bring forth cries of amazement ducing little or no progress toward shore. I ever explain this to Hobie?” from the local spectators. Can’t you just hear the local beach “Through all of this frustration, I Next add the landing gear and the bum types yelling “Surf’s Up! Hawk’s managed to regain my senses and decided cabane struts. Cut a temporary spacer down!?” · to check for damages. Bravely I gritted o f scrap wood to fit between the top my teeth, and expecting to see nothing decking and the bottom o f the wing to below the ankle, I raised my leg for R o la n d ...... Continued from page 43 obtain the proper incidence, and glue examination. As the foot came to the sur­ however, in Peanut size, there could be wing to top of cabane. Add tail surfaces. face, still connected to my leg, I saw a weight penalty. Without any ballast or thrust adjust­ the demon o f the deep that had caused Fortunately, I had the foresight back ments, my prototype flew left-left with me pain . . . a ferocious sand crab. in '39 or so to put away in the scrapbox with a steep left-hand climbing turn and "She was about the size of my palm some small spun aluminum cowlings a gentle rollout. There is quite a bit of and at this moment was clinging to my which were than a common hobby shop initial torque and you might have to little toe, swinging her free pincher item. Assuming that you would probably launch with the right wing slightly down. threatingly. With a little urging she not have a comparable cowl handy. I Power is one loop of 4 or 6 mm rubber.

6 2 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER PLASTICNEW! SCALE GOLDEN AGE ENGINE PRATT & WHITNEY "WASP” Molded in two colors of plastic, this model consists of more than 200 parts. Included are: nine cylinders, crank­ case, carburetor, car­ buretor stack, two magnetos, fuel pump, oil pump, starter, MARTIN B-10B 1 /7 2 sc a le p la s tic scale m o d e l k it propeller hub, vinyl ignition harness, and display mount. The MARTIN B-10B was a forerunner of advanced WWII bombers, Suitable for exhibit by itself, or installation in a scale and spanned the 1934-1942 era. B-lOs were used by the U. S., Holland, Russia, China, Siam, Turkey, and Argentina. This aircraft fea­ model aircraft. iy2" = r SCALE Price: $11.95 tured such refinements as fully enclosed crew, retractable landing gear, ALSO AVAILABLE: WRIGHT J-5 ' ‘ WHIRLWIND” 1 % " SCALE KIT AND controllable pitch propellers, and revolving gun turret. Kit features: LE RHONE ROTARY 1 V i" and 2 " SCALE KITS Landing gear may be installed in your choice of positions. * Choice of hard or flexible tires · External bomb rack and bomb · Micro Scale decals with choice of markings · Plastic display stand Price: $4.95

BOEING 247 1/72 scale plastic scale model kit Forerunner of today's transports, the BOEING 247 incorporated such advanced features as all-metal construction, retractable landing gear, de­ icers, and controllable pitch propellers. Model may be finished as Roscoe Turner’s racer or a United airliner. Kit features: Two types of wind­ shields · Landing gear may be installed in your choise of posi­ tions · Choice of hard or flexible tires · Decals by Micro Scale (racer and transport markings) · Passenger seats · Turner’s long- range fuel tanks * Plastic display stand Price: $4.95

FROM YOUR DEALER OR ORDER DIRECT, ADDING 1 5 % POSTAGE AND HANDLING SEND 25c FOR COMPLETE CATALOG DEPT. MB · 181 PAWNEE STREET SAN MARCOS, CALIFORNIA · 92069

With lower power and resulting less and hook back to the same spot! Won­ holding things down, and also for cut­ speed, I found this plane somewhat d if­ der if Pirelli would catch Italian fish? ting aluminum tubing: Slip a piece o f ficult to trim indoors. I recommend NEW LOOK FOR SMITHSONIAN music wire inside the tube, lay it on the outdoor flying. Carl Hatrak brought in a TWA news­ iron bar, and cut by pressing the edge of There is only one more thing to do, letter, which featured an artist’s rendi­ a kitchen paring knife against it as you and that is to make up a sign which tion o f a portion o f the Smithsonsian roll it back and forth. It cuts true leaving states, “This aircraft is NOT a Fokker Institute National Air and Space Mu­ only an easily removed burr. Any old D -V III.” Smile! · seum, due to open on ) uly 4, 1976. knife will do and needn’t be sharp. I This particular exhibit will be devoted bought a paring knife at a flea market Hannan...... Continued from page 42 to air transport o f the 1930s, and will for 54, and it has been worth dollars has decided to keep it... at least for a feature a Northrop Alpha, Douglas DC-3, in saving my sharper blades for more few more years. To this end, has re­ Ford Trim otor, Boeing 247, and a Pit­ worthy cuts! newed his lease on the Long Beach, cairn biplane. Evidently, most of the “ Up here in the country, we are both California hangar, to the tune of aircraft will be suspended, model air­ blessed with many acres o f sheep pasture $100.000 per year! plane fashion, with some mounted on and rangeland, and cursed with foxtails ANOTHER ARTIFISHIAL plinths. and summer heat. For the foxtail prob­ SHORTAGE? HANDY HINTS DEPARTMENT lem, I borrow from my snow-tromping According to Frank Scott, Ohio hob­ Ralph E. Scott (no relation to Frank friends and wear bread wrappers inside by dealers are pointing an accusing fin­ Scott) mailed in several clever ideas my boots over my sox. True, my feet ger at fishermen when the general non­ which we felt were well worth report­ do sweat a bit, but it sure beats throwing availability of rubber is mentioned. ing: sox away, or spending time picking Seems the sportsmen are buying up all “ Pliobond and 5-minute epoxy both stickers out o f them !” they can find, for use in a new fangled work better for cementing sheet acetate SPOKESMAN FOR THE INDUSTRY fishing system: They tie a rock to a windshield than other glues. Be sure to Fulton Hungerford strikes again. With short piece o f string, which is in turn roughen the mating areas o f the sheet the world-wide acceptance o f his silk tied to the end o f a LONG piece o f rub­ with sandpaper. thread spoke wheels for rubber-powered ber. To the end o f the rubber is attached “ Keep your cottonpickin’ fingers o ff models and dacron thread spoke wheels a fishline and baited hook. To use the the back o f transfer (rub-down)letters. for larger models, it was inevitable that affair, the rock is thrown, shot or car­ There’s cottonseed oil on them. requests would be received for metal ried by boat to a likely spot. When a “ Tissue sometimes seems determined spoked wheels for heavier models, as finny denizen takes the bait, the fisher­ not to stick down at the edges of lightly well as for museum-type static display man cranks him in by the time-honored doped Peanuts. Try a touch o f ‘tacky’ aircraft. Featuring stainless steel con­ fashion, but in so doing, the rubber is glue, which is available from craft shops. struction, the new line of wheels is the stretched. He removes the fish, re-baits “ A length o f bar stock iron from the result of many months o f experimenta­ the hook, and lets go o f the line. The hardware store 1/2 x 2 x 8 inches makes tion in manufacturing methods, and rock-anchored rubber then pulls the line a fair anvil; a handy-to-have weight for should be available by the time you

DECEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 63 Two different school teacher/mod- elers told me that they obtained theirs 9 SPAN 1/4 AERONCA “CHAMP” by posting a sign on the bulletin board . . . again, at VERY low prices. As a des­ peration attempt, a small classified ad­ SUPERSIZE STANDOFF SCALE vert in your local newspaper would un­ doubtedly yield a Vac-U-Form. P.S. Please don’t ask us to find you one! NOT FOR MS ONLY With apologies to Char Rohring, we are very proud o f the females in OUR audience, and are always happy to ex­ tend recognition to them. One of our photos this month (if Bill Northrop doesn’t swipe it for Char’s column) de­ picts a Travel Air “ Mystery Ship,” con­ structed by Chris Fulmer, from a plastic kit. Seems that Chris had been watching her professional model builder husband, Mike, produce static display models for several years, and decided to try her hand at it. The results speak for them­ selves, but we point out the fact that this first-ever model features complete Super Fast Assembly 10 lbs. All UpWeight rigging, difficult-to-do scalloped and .60 Engines and up 1500 Sq. In. Wing striped paint scheme, and a number of 3 or 4 Channel Radio All Wood Construction details not found in the original plastic Rolled Plans Machine Cut Parts kit, such as pitot tube and individual Hardware Designed and Produced cockpit instruments. The topper to the 105%" Span by Bud Nosen achievement is the fact that one o f her husband’s customers liked it so well that BUD NOSEN MODELS he bought it! Write For Our PHILATELY, ANYONE? Box 105 B, Two Harbors, Minnesota 55616 Illustrated Catalog — .25« According to our mail, quite a num­ Phone: (218) 834-4544 ber o f model builders are also stamp collectors. Research buffs find this an read this announcement. For a com­ find something o f interest between these added bonus when corresponding with plete list o f sizes and prices, contact covers. Available at better aviation book overseas enthusiasts, and not surprising­ your local FH wheel dealer, or send a stores, or directly from the publishers: ly, the majority concentrate on stamps stamped envelope to: FH WHEELS, HERITAGE PRESS, Box 167, Glendale, featuring aircraft. We note that the latest 1770 Lilac Circle, Titusville, Florida California 91209, for $5.95 plus 50i/ “ 200 Years o f Postal Service” issue fea­ 32780. postage and handling charge. tures a sort o f “ stand-off-scale” Jenny. HEAVIER LIGH I PLANES? BILL HANGAR? It ought to be less tail-heavy than usual Not the aircraft, but the newly revised This is how a letter from reader Rick with the length missing from the fuse­ book, “ THE LIGHTPLANE SINCE Sierk was addressed, which gave us a lage, but with the prop it has, it may 1909,” by John Underwood and George much-needed early morning chuckle. never leave the ground. Oh well, perhaps Collinge. The original volume “ THE Enclosed was a tear sheet from a classi­ someone w ill be lucky enough to get LIGHTPLANE” is now out of print, fied advertisement which demonstrates one that has been printed upside down! and was considered one o f the better the ridiculous status o f today’s prices. ELEMENTARY MY DEAR WATSON! reference books for scale model enthu­ Offered for sale is a Mattel Vac-U-Form Bill Watson, king of the novelty mod­ siasts. This latest publication contains at $75,001! While we wish the seller the el, has joined forces with famed hang- all the fine photographs and three view best o f luck, we recommend psychiatry glider designer Taras Kiceniuk Jr., to drawings o f the earlier release, plus four for the buyer. produce a man-powered aircraft. Both extra pages featuring new photographs. These Vac-U-Form toys do make Jim- fellows have extensive model building Starling with Santos-Dumont’s famous Dandy additions to a model builder's experience, and in fact, the present pro­ “ Demoiselle,” this book traces the evolu­ bag of tricks, particularly for forming ject has been well tested in miniature tion of light aircraft through! the years small canopies, spinners, wheel pants, form. Featuring a high percentage of with special attention to the innovative etc. However, if you want one, we sug­ foam in its structure, the craft will be types which have exerted influence on gest first checking with your local Sal­ covered by some sixty rolls o f Solarfilm, the entire aviation industry. From a vation Army or Goodwill stores. Going contributed by the manufacturer. The modeler’s point o f view, this is a real prices locally have averaged anywhere seriousness with which the design is re­ winner, with sparkingly clear photo­ from $1.50 to $5.00. Swap meets also garded may be appreciated by the fact graphs well reproduced, approximately yield these items, at prices naturally sub­ that National Geographic magazine has 37 three-view general arrangement draw­ ject to negotiation, but certainly less taken an interest in the progress. ings, plus nine cut-away illustrations of than $5.00, except perhaps for an ab­ AND ANOTHER aircraft which almost cry out to be mod­ solutely mint, complete-in-the-original- In England, yet another small group eled! We received a copy o f the early box example, which might justifiably o f model builders is graduating to the version o f this book back in 1970, and fetch $10 to $12. If you are unable to fabrication o f full-scale aeroplanes. The have probably referred to it more fre­ locate any in your own area, ask a friend Early Aircraft Construction Group, led quently than any other publication in living near any of the larger cities. These by David Deadman, proposes to build a our fairly extensive archives. Whether toys were sold by the hundreds of thous­ two-seater o f vintage design. Participants your interests run to free flight, R/C, ands (even by Sears and Roebuck), so will have shares in the end product, in­ or control-line scale, you are likely to the woods SHOULD be full of ’em! cluding occupancy of its passenger seat!

64 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER \\

H O T S TU FF TM. GETS IT TOGETHER FLASH! 'HOT STUFF" IS NOW $5:Z2 PER UNIT ! (Two large bottles) FAST THANKS TO TREMENDOUS AT YOUR HOBBY DEALERS NOW WORLDWIDE MODELER ACCEPTANCE DEALERS AND DISTRIBUTORS S A TE LLITE CITY, P.O. BOX 1935 CALL (213) 899-2301 ARLETA, CALIF. 91331

A good idea, that. Any o f our U.K. may be warmed before each application this was the largest MECA showing in readers who may care to investigate the by holding near to the light. A pre­ the Northwest. proposition may write to 24 Cole Park warmed leather-working tool makes a Stalick further reports that because Road, Twickenham, Middlesex, England. helpful stylus. More o f these ideas next the field had not been burned (quickie way o f clearing), there was ample grass WORLD WAR I AEROPLANES, is month. for soft landings and even harder crashes. the name of a newsletter-type publica­ SILLY SIGN-OFF It seems this kangaroo sauntered into To top this off, the weather was near­ tion published by Leonard E. Opdycke, a hobby shop one day, and asked for a perfect, with variable winds, necessita­ Greenbriar Apts., A-12, 347 South Rd., tube o f glue. The proprietor placed the ting a crew to keep switching the take­ Poughkeepsie, N.V. 1260L This volun­ cement on the counter, took the ten- o ff boards. Actually, with one or two teer operated publication is devoted dollar bill proffered by the customer, and mph winds, this was a luxury when com­ primarily to coordinating the efforts of as he turned to his cash register, he bined with a weather temperature o f 84. people who are restoring or reproducing thought: ‘‘What can an animal possibly full-scale early aircraft. Quite a deal of The columnist was rather surprised know about money, anyhow?” Thus, he information useful to model builders when his reservation with Jupiter Plu- handed back only a five-dollar bill and also appears, including 3-views and de­ vius for good weather actually materi­ turned away. The kangaroo put the tail drawings, as well as photos and des­ alized. In an encouraging letter to Sta­ fiver and the glue into his pouch, and criptive text. The September issue fea­ lick, good weather for the Annual had continued browsing around in the store. tures information on the aircraft located been guaranteed. Just a case of knowing The dealer, perhaps feeling a bit guilty in the Polish Air Museum, and also a the right people . . . haw! said: “ Ya‘ know, we don’t see many round-up o f information on the Nieu- To try and list all the events (10) and kangaroos in here.” “ Well,” said the port Monoplanes, special favorites here the winners is a little beyond the scope ’roo, “ A t five bucks a tube for glue, I’m at the Hangar! Why not send $1.50 for of this column but Don Nordlund, Tom not surprised!’’ · a sample copy? Alden, Rod Russell, and Ray Chalker ran o ff with most o f the prizes. Best HANDY HINTS DEPARTMENT: Plug Sparks . . . Continued from page 25 time o f the day was taken by Tom There seems to be no end to the in­ The contest was preceded by the An­ Alden’s rubber cabin model, a 1936 genuity displayed by our readers, and nual WMC-MECA Collectogether. Ori­ Canadian Wakefield design. To show it here are a few we felt were worth shar­ ginally, this was a get-together held at was no fluke, his 1937 Mulvihill stick ing: Don Typond says that the handiest Bob Stalick’s home, but because o f the rubber job did the second highest ac­ new item on his building board is a poly­ Stalick hospitality, it simply outgrew cumulated time! ethelene plastic cutting board, designed the homestead. The Tangent Commun­ Erie Moorhead lost his bet with Al for kitchen use. Don uses it for a base ity Center was employed, with a large Grell when he failed to complete his while cutting out formers, ribs, and such­ room for displays and side rooms to model for the contest. After having to like. He points out that it will not dull show slides and movies. Something going pay $ 10.00, he was forced to pose with your uber Skiver, as some other cutting on every minute! No question about it, Bob Schafer’s Red Zephyr just to remind surfaces might. Then too, he mixes epoxy on it, which peels right o ff when dry. Ralph E. Scott favored us with a M O V I N G T O S O U T H E R N C A L I F O R N I A ? flock of good suggestions, but here are a couple that we especially liked: Pre­ MAKE SURE YOU GET A HOME coat strips o f paper matchbook cover WITH A MODEL WORKSHOP ! ! and paper matches with cement and car­ FOR ALL YOUR REAL ESTATE NEEDS, CONTACT: ry them with you. They will grab quick­ er when used for nose-block thrust ad­ ANITA NORTHROP justment shims. A thin coat of added “ SE HABLA ESPANOL!” cement will dry quickly and securely if the balsa has been doped too. SPECIALIZING IN: ! χ ι (714) 979-1050 Transfer letters used for markings on RESIDENTIAL : 1 JC |PJ|K^. (714) 538-9625 scale models work better when warm. COMMERCIAL Office at: If the sheet won’t lift o ff leaving the let­ INDUSTRIAL · T F H ΠΠ· 688 W. Baker St., ter intact, then warm a pencil eraser Æm\ Costa Mesa, Ca., 92626 thoroughly near a light bulb, and hold l a n d : real estate on the sheet. In cold weather the sheet

DECEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 65 WANT TO W IN? Pearls Take U.S.F.F. Team Championship! Pearl Team #2 won the prestigious team honors at the U.S. Freeflight Championships at Taft. California, over the Memorial Day Weekend. In addition. Guy Kirkwood set a new Class A record of 43:31, using his FAI Midi-Pearl to make four flyoff flights after he damaged his own “A” ship. Pearl team members were Gene Simpson, Ed Cad- well. and Bill Moore. Flying Pearls in Vi A, A, B. C, and D they outscored the toughest competition in the country. Want to win? Fly a Pearl—in any size—and be set for top performance. American Balsa Corporation 5250 Gulfton, Bldg. 3-D, Houston, Texas 77036

Erie what one looked like. Some guys mored report that a racial parade would a beautiful day o f flying on Saturday. are real gluttons; Erie now has another be held in Taft, California to protest the As wag Jim Dean put it, the wind got $10 bet with Al for the October 26 con­ ejection of two students from Taft Jr. up before the contestants. test. Barnum was right! College. To everyone’s chagrin, nothing Regardless, a goodly amount of fly­ 11th ANNUAL ERIE ANNUAL happened, and several excellent contests ing was 'enjoyed by all. Bob Hunter, In the crush of a tremendous amount went by the board. sporting a converted K&B Torpedo 40 of news, last year's E.M.A.A. O/T Annual The SAM 21 meet, to be held in con­ ignition motor, showed the boys how got blue pencilled because o f late sub­ junction with the SCIF-SCAMP F/F to make a Sailplane perform. With the mittal. This year, Lin Reichel took time Meet in September, went o ff as scheduled engine turning at an estimated 16,500 to advise this writer of the good lime but suffered heavily from lack of par­ using 5 to 1 fuel featuring Blenzoil had by one and all. ticipants. Original estimates of atten­ lubrication, the model practically climbs Being just across the lake from Cana­ dance fell far short, as most modelers out o f sight in 25 seconds. Something da, this meet draws Ontarians, giving still thought the entire meet was can­ to think about men! the contest an international flavor. Held celled. Winners were: Jerry Vernon in Class at Chagrin Falls, Ohio, the contest was In the flying, the bright spot of the A, Bob Chambers (Las Vegas) took a social and competitive success. Despite day was the spectacular 30 minute flight Class B over his idol Sal Taibi, Bob threatening skies and brief showers, the by Otto Bernhardt's Lanzo Record Hunter easily won Class C, while Bob contest was favored with 43 entries. Breaker as flown by son Phil. As second Oslan won both 30 second Antique and Surprisingly, the best times were ob­ placer Pond said, “ It took both o f them the .020 Replica Events. Mark your cal­ tained in the morning and showers. When to beat me." endar for next year. This meet is a real the sky cleared, with help from the wind, Biggest problem now in flying at Taft funfest! the wind stayed and two minute flights will be the securing of motel reservations NEW O/T KITS were clear o ff the field. Rough retrieving! as the sudden shift and cancellation of Just got a call from Sam Blumberg, Vic Didelot, the perennial C.D., did meets left many motel operators with of Micro Models, who has been spending his usual outstanding job of running the a large number o f unfilled long-range his last six months working on an RPV meet. Uncle Bob Reuter paced the boys reservations. Never saw it to fail, the project. Now that this is pretty well with two firsts, while nephew Bill modelers do it to themselves! wrapped up, Sam is going to produce Reuter copped two places to show that LAS VEGAS BASH 300 sq. in. size old timers especially for the younger set could still do it. Some Here’s a tremendous meet that draws R/C flying. The models should accom­ were not so fortunate, like John Grigsby, well because of the night entertainment modate .049 to .09 engines. Of course, who ruined two models. Early winter available at Las Vegas. As pointed out if you want a hot one, you can always wheat planting, eh? last year, the SCAMPS make this an use a .15 size engine. SAM 21 TEXACO MEET annual pilgrimage with a large group Sam sez the Scientific Mercury and This meet suffered from the panic going up staying at the same motel. Miss America 300 sq. in. versions should o f the modeling clubs who cancelled all This year, C.D. Gene Wallock had to be ready for release on Nov. I. That’s a meets in September based on the ru­ call a halt to the Sunday flying after little optimistic, but if you want to be

6 6 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER among the first, send your $24.95 to Micro Models, P.O. Box 1273, Covina, KUBBIK POWIRCD FLYING MODUS CA 9 1722. Good trainers! KITS · PLANS · ACCESSORIES Blumberg further states he will pro­ urs duce more designs if the demand war­ PIETENPOL S3.29 NOW AVAILABLE pECK MILES S3.29 rants it. This is great stuff! With Bob TURBULENT S3.29 Oslan producing 50 inch scaled down R.O.G. PIPER CUB S3.29 ANDREASON S3.49 kits, the guy with the thinner wallet for SUPER EASY TO BUILD COUGAR S3 49 R/C in old timers is getting a real break! MUSTANG S3.49 FLYS OVER ONE MINUTE Before we completely forget it, the ZERO S3 49 models have been flown with Kraft 4 * SPORT MODEL KITS bricks, Cannon Twin-Blocks, and Futaba $139 STRINGLESS WONDER $2.49 PECK R.O.G. SI-39 3 channel sets. That should be versatile HANNAN PLANS -90 TO PICK FROM enough. NEW 76" CATALOG 25C JAPANESE TISSUE — RUBBER LUBE — HUNGERFORD WHEELS HAND TO TIND 4CCfSSOWS KITS AND MORE FREEBEE PLUGS ALL SIZES OF PLASTIC PROPELLERS HANS TON NUBBIN NOWfNtO MODUS CPM announces another fine O/T re­ PECK-POLYMiRS P O. BOX 2498 MB LA MESA, CALIF 92041 plica, this time, the “ Soaring Glider,” PHONE 1714) 448-3164 o' 17141 469-8675 an old Modelcraft design. With Conley Moody’s usual quality balsa and Japa­ nese tissue covering provided in the kit, FOR THAT PROFESSIONAL LOOK. . . this is a real super-flyer modestly priced at $3.98. Get yours while they’re hot! DENVER ECHO I Phil McCary, Sweepstakes winner o f the 1975 SAM Nats, came in for a good BALLAST-LOK' amount of roasting at the SAM Victory $1.95 Banquet when he was awarded a set of 'HOOKER panties by Roy Turner. In winning the $2.49 Sweepstakes Trophy, Phil lost his rubber V * * powered Lanzo stick model. Upon his return home, he received a letter from BOTH FULLY ADJUSTABLE one of the local farmers stating, “ I found AVAILABLE AT FINE HOBBY SHOPS EVERYWHERE your toy airplane in a wheat field. It is powered by a long rubber band.” Phil Add 35 cents postage and handling. California residents add 6% sales tax. relied on Turner to get his model, and Turner promptly mailed the model in a ^SCO TT RESEARCH CO., P.O. Box 22, Costa Mesa, Ca. 9262\ 7 j huge 3 ft. square by 6 ft. long card­ board box with the inscription, “ World famous record breaking toy airplane several months ago, Ralph Dodsworth easily. Having very little grain, it does powered with long rubber band. Handle o f Saskatoon, Canada, offers this infor­ not tear readily. with care.” The SCIF members are still mation in, response to the columnists To wrap up the subject, Ralph Dods­ laughing. letter of inquiry. worth says the use o f this material in Got another note from Joe Beshar, First, the polyester lining (as it is Canada came about because of the ex­ S.A.M. Prexy (you haven’t lived until used in dresses, etc.) is available from treme shortage of silk. Actually, this you get a letter from Joe!) wherein at­ most yard goods stores at about $1.00 has turned out to be a blessing in dis­ tention was drawn to the fact that Tim to $1.25 per yard (compare this with guise, as the polyester lining has proven Dannels is the committee chairman to silk!). Best part is that it comes in 42 or to be a most satisfactory covering. study the converted ignition engine prob­ 44 inch widths, and can be bought in NOTES FROM WCN lem. Write Tim with your suggestions! any length up to 20 yards. We've got a nibble on the 1940photo MORE METHODS ON TRACING The material is handled very similarly by AI Heilman that was published in TEMPLATES to silk, only the framework is given four the August issue. A I Pinson, Atlanta, Jim Thomas just sent this columnist coats o f dope. The acetate sheath is then Ga., a fellow well known by early RICers, a Dritz wheel, together with instructions attached to the model framework using writes to identify the owner o f the giant on how to use same. Jim says he gets thinner. As Ralph points out, the various R/C ship as an electrician by the name o f extremely accurate results with this gad­ brands will either shrink or loosen when Freeman. This was the first and only get. He uses the Dritz by placing carbon dope is applied to the covering, so make ship he b u ilt! A I Pinson was there him ­ paper above the wood and the parts or sure your covering is tight to begin with! se lf. .. in fact, he’s the guy with his plan outline above that. When he uses As to colors, this is the most in tri­ nose in the cabin. Anyone from the the same concentration with the wheel guing part o f the use o f this material. Miami area know i f Mr. Freeman is still as he does with a razor blade, he finds Practically any color in the rainbow can around? results are good. be obtained. Don points out there are Next, we received a criticism from Actually, Jim modestly says the idea six shades of yellow alone! It is just SAM President Joe Beshar for suggesting is not new, as his secretary reminds him worth the time to go down to the store that one bay be added to each wing that the Dritz people also make a model and see the various colors available. panel o f Pete Bowers' "Pursuiter," pub- with a serrated wheel. This type tracing The material is actually stronger than biished in the September issue, in order wheel could be useful in marking hinge silk. Ralph rates the polyester lining to to increase the wing area slightly to lines, etc., with some sacrifice o f damage silk the same as he would rale silkspan qualify it for a larger engine in R/C to the original plan when cut exactly on to silk. Convinced yet? Here’s more! O.T. Naturally, Joe is correct. As the the marked line. Worth looking into, The lining is heavier than silk. Esti­ rules now stand, the whole ship should men! mates say twice (big deal!), but the at­ be slightly enlarged to maintain proper POLYESTER COVERING, ANYONE? tractive part of the polyester is that it proportions. However, we feel that the As a followup to the writeup on poly­ does not warp over a period of time. The .10 cubic inch per 225 sq. inches is ester covering featured in this column material is tough and does not puncture too arbitrary a ruling, and that a more

DECEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 67 MODEL RACING PRODUCTS, INC. g ö v 12702 N. E. 124TH STREET KIRKLAND. WASH. 98033 M 500 ROAD RACE KIT PHONE: (206) 827-8607 NOW YOU CAN GET THE BEST HANDLING STOCK CAR KIT,

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put first things first! changes except for new sails and to move Sailing Yacht* For FINAL WORD the traveler for the mainsail down to a just received a letter from Russell position flush with the deck. Here is a Radio Control Stokes, who is rightfully proud of his 15 description of what I did to my boat year old son who builds old timers with in preparation for the 1975 ACCR. a passion. Dan has been modeling ever HULL: I substituted 1/16 plywood since six years old and really came of sheathing for the 1/8 which came in the TAHOE 600 age when he won the Old Timer Event kit box. I understand that Dumas has at the Southwest Model Airplane Cham­ now switched over to this thinner stuff pionships with his Zipper. To show this which is much easier to work. I built was no fluke, he had previously built a up my own keel (the strip which runs gorgeous Super Buccaneer when barely down the centerline of the hull on the 14 years of age. bottom) by laminating it up out of 1/2 AMYA 36/600 CLASS Dan had really planned for the SAM X 1/2 pine. This required that I notch LENGTH 36 in the frames somewhat differently before BEAM 9 V< In Championships at Denver having four SAIL AREA 600 S' In models.all completely checked out. Mat­ assembling them. I also removed 3/4 ter of fact, Dan was so confident he had of an inch o f height from each frame $38.95 pre-paid all entry fees. to bring the freeboard (distance from Well, wouldn’t you know it, the doc­ water to deck edge) back to the scale tors found something wrong with him measurement. The extra 3/4 was added VALKYRIE and an immediate operation was in order. to the early boat due to the extra weight AM YA 6 0 /8 0 0 CLASS That did it for the O/T Nats. Dan is o f older forms o f R/C gear in use back LENGTH 50 In now planning a model for each event in then. BEAM 1 1 '4 In $74.95 the 1976 SAM Champs. Now how about A ll frames were opened up on the SAIL AREA 800 sq in that? inside until only about a 1/2 inch or so Complete kits include molded plastic Dan is a triple threat man, being an remained around the outside. This was hull and components, all rigging, finished honor student, top athlete and star foot­ to reduce weight, as well as to open the sails and semi-fipished wooden parts. ball player. To top it o ff he is absolutely hull in preparation for a swing-arm “ bananas” about model airplanes. Then winch. I used a solid noseblock forward TAHOE SAIL SYSTEM $27.95 I just heard the other day from an old of the No. 1 bulkhead. This was to VALKYRIE SAIL SYSTEM $35.95 modeler who plaintively said, “ Who is prevent damage to the hull skin in the is going to take our place? "Well men, inevitable collisions which occur in com­ as long as we have young fellows like petition. Of special need is to open out 1 /fP W R PRODUCTS Dan Stokes coming up, no worry about the frames just forward of the transom. 11715 Adenmoor Ave. Downey, Ca. 90241 the old timer kick. Who said, “ I'll drink I found that it is a fine place for stuffing Calif residents add 6 * la» DEALERS WELCOME to that?” · a ballast bag on windy days when you want to prevent nosediving and promote logarithmic rating system should be used. S ailing...... Continued from page 31 planing. Not only that, it should probably be they too are working through Dave in I installed a Yankee keel, ballasted broken down into "cabin"and "pylon" order to meet AMYA specs. I would to 6.5 pounds, in much the same way classes. We'd like to work up a proposal imagine that the 1976 season will be as on the Yankee. I decided that making to SAM for this, and invite suggestions most heavily sailed in the wooden boats, swappable keels on the STAR would for area vs. displacement limits. Come with maybe a few ’glass ones in the hands be frowned at, so fixed this one in place to think of it, we’ve become so em­ of manufacturer’s personnel. I’ll be sail­ (Fig. 1). Three top boats at the ’75 broiled in O.T.’s that we've never ing my SPOT, which won the '75 ACCR, ACCR had keels with slender bulbs, and thought to send in our money and be­ and that will provide us with a bench­ they finished 1-2-3 in every heat sailed. come a voting member! Guess we better mark, as I do not intend to make any I for one, would approve of leaving keel

6 8 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER iuUlvcuv -ψ- ip R O D U C T S , INC. 535 Davlsvllle Rd„ Willow Grove. Pa. 19090 · (215) 659-3900 PDQ MOLDED WING CORES... 10 times the strength of cut foam wings Score another "first” for Sullivan — the first molded wing core in the world. In addition to its incredible strength, it’s quicker to complete construction, lighter because you use less balsa, and far more economical. • fits 8 out of 10 pattern aircraft • designed for 40 to 60 powered aircraft • fully elliptical • can use modern iron-on coverings Hurry over to your dealer’s and take a look — PDQ.

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while underway (see photo). A Sail En­ gineering SE-IP proportional sail winch was used and it performed faultlessly during the entire season. I used a 2:1 purchase on the jib sheet, and a 3:1 purchase on the mainsheet, as I elected to sheet the mainboom almost directly under the clew o f the main. This allowed precise control of the main leech, and draft. A Soling rudder was put in, and the traveler to allow it to be moved by moving the mainsheet only 1/2 inch,

DECEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 69 those "under 50" events we hear about out in the Midwest. Bet you a new jib that she cleans house!!! A tentative location for the STAR 45 ACCR will be Pitman, New Jersey, according to the Class Secretary. Date has not been picked yet. If you have an old STAR in your attic, dust it off and come out and enjoy the sailing!!! Remember to send your 1976 AM YA dues into Bud Salika, 3917 Sunnyside Avenue, Brookfield, III. 60513. This is the season that Bud breaks out the new vintage o f his famous blueberry wine and makes up the new class lists and mem­ bership cards. Remember also, to list all your active boats when you renew your membership. You don’t owe a dol­ lar on a boat unless you have let it lapse by failing to report it last year. I’ll field questions directly at 7608 Gresham St., Springfield, Va. 22151, or in care of MODEL BUILDER. ·

C/L ...... Continued from page 37 is current World Champ, Bob Gieske, in second place, and Bill Werwage in third. Les McDonald just missed making the three man team, coming up 21 points f ------short of Werwage’s third place score. j M IN I t ^ G LU E TIPS y TEE BAR This year’s FAI tryouts were held in ANY X ALUMINUM EXTRUSION AN ^ SANDING 8LOCK Dayton, Ohio. Not all o f the wind is in PUT THE VVHtHt lo» mm Wtt. R U F F -S T U F F Kansas, and Seattle isn’t the only place YOU WANT IT ^ V "S·*» · * » » · tjndpep·»" • l*·«» T-u#SuftiC« where it rains. They had both rain and 1 jjR - · Won iW m O u i $1.69 wind in Dayton. Η» 9 9 c - · Hand· to Ut* 72 incii $2.89 Prior to the tryouts, there were fears o f too many contestants (some expected RUFF‘S ? STUFF MINI £ 7 SANDER as many as thirty to show up), but by "SELF ADHESIVE SHEET ■ ADJUSTABLE TENSION Friday there were twenty-one that actu­ SANDPAPER" HAND BELT SANDER M4*Ct ally showed up to fly, ensuring that the , MAKE VOUR OWN SPECIAL e t i r # FIRMLY MOLDS PAPER SANDING SHAPES FOR EASIER SANDING FAI tryouts wouldn’t be rushed and ^ - .** · Adh«m to moil M«irn«n · EMy TO U t· · Handy to Mokl hectic. ' — · No n« tty ei were there, with the exception of Jim / / Λ DOC) SAVESTIME REPLACEMENT F in· Garnet AND EFFORT 9 9 < SANDING BELTS. A nt'd W«t·· Proof Lynch (7th) and Bob Whitley (8th). j ______— ------Bob Gieske, using his 74 plane, (the I was able to make the boat snap to sails are included. I think Dumas has 75 plane was damaged at the NATS), weather in the puffs, then slack o ff and done the right thing by pointing their was top man on Saturday with a high close reach with excellent speed, without kit toward getting people into the hobby. score of 938.67 in the first round, touching the rudder. This boat was tack­ Only about 25% o f the boats would be and high score of 984.67 in the second ing through an included angle of no expected to come out to race, and those round. After completion of Saturday’s more than 75-78°, and is much closer skippers will undoubtedly add the new flying, Gieske was leading, followed by winded than anything I have sailed, ex­ gear that they feel is necessary to become Gene Schaffer, Les McDonald, Bill Wer­ cept possibly Chuck Black's BINGO. I competitive. wage, AI Rabe, Wynn Paul, Bob, Jerry hope to get on the water with these Though long touted as a dog when Pilgrim, Kent Rogers and Fred Miles. two boats, and see if the STAR will compared with other boats, both AMYA Fifteen finalists were chosen using their outpoint the 50/800 which won the 75 Pres. Bob Harris and I were greatly im­ top single score. ACCR for that class. pressed with the performance of the It was windy again on Sunday. Sev­ RIG: I used a single panel rig, with STAR. Raced as a one-design, its ma­ eral fliers did an anti-wind-and-rain 3 oz. dacron in both main and jib. The neuverability at the starting line is great dance, but it didn’t seem to help. Les main changes were in the manner o f fun, and a real test of a skipper’s reac­ McDonald and Gene Schaffer led early rigging, and there is a direct line from tion time. I’m so amazed at the pointing in the first round on Sunday with 920 the Yankee rig to this one. A dimen­ ability of the hull, that my drawing and 929. Then Bill Werwage put up a sioned drawing is included for your use. board has a 50 inch version with which good flight for a score o f 946.33, which I am quite sure that the sails make the the M-class may have to reckon in the was top score in this round. Bob Gieske major difference, since at the ACCR, near future. Forest Godby, 5th place had some wind on his flight and scored a there was only one boat with the stock finisher at the 50/800 ACCR this year, low 888.0. As Sunday’s first round was cotton variety, and of the boats opera­ was sailing a hard chine boat, and is now completed, conditions got worse and ting, he finished dead last. Even a good at work on modifications. Won’t that nobody was able to challenge the leaders. skipper cannot make poor sails perform, be an interesting addition to AMYA’s By the second round, things were but on the other hand, there is a de­ largest class? But I digress. Next year, pretty well wrapped up. Les McDonald finite problem with kit prices if racing I’m going to take SPOT to a couple of and AI Rabe were the only ones to

70 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER have a shot at taking a team slot. Rabe was only able to score a 769.33 and was out of it. Les made a try for the team by putting up the best flight of AftCMlg... NEW SPRING ACTION this round, scoring 918.67, but he was still 21 points short. Gieske was sure of a spot on the team and elected not to KWIK-KLIPS fly in the final round. Team placings were determined by It’s finally here!!! A battery the total of each flie r’s two best flights. clip that won't ever slip Gene Schaffer came up with 1880.67, or vibrate off! Bob Gieske with 1872.67, and Bill Wer- wage ended up with 1864.67. That is Spring action locks the Kwik-Klip onto the pretty close competition. Looks as if we have a very good team to represent us glo-plug for continous positive contact. at the upcoming World Champs. 'Indestructable steel and nylon parts. Keith Trostle, Pres, o f PAMPA, that ’ Available with or without battery wires. super Stunt group, ran o ff the FAI try­ The best yet in engine starting accessories. outs in a superb manner. I'm sure that No. 150 (without battery wires) .700 Keith had lots of help, but it always takes one guy with initiative to run a No. 151 (with battery wires) $1.25 good contest, and Keith is the one who Patent did it this time. Pending All of the above concerning the FAI tryouts was freely and liberally stolen from my latest issue of Stunt News, edited by Wynn Paul. I want to thank Wynn for the results, but I can’t help 1/2 A KWIK· KLIPS but wonder why nobody bothered to For engines .020 to .074. send in some pics from this very im­ No. 148 (with battery wires) SI .1 5 portant contest. Names and scores only No. 149 (without battery wires) .650 tell part o f the story, pictures tell the rest of it. Shown actual size on an .049 Also included in Stunt News were complete specs on the planes used by ■DU-BRO PRODUCTS INCORPORATI the top three. Even though it will take 480 Bonner Road Wauconda. Illinois 60084 U.S.A. up a lot of space in this month's column, 1 found the spec sheet to be very in­ teresting, so I’ve decided to put it in. • Antique F. F. AVRO- BLERIOT- OLD CLASSIC Again, thanks to Wynn for gathering .Coupe d’Hiver CAUDRON -Ρ Τ Ί- dimensions and publishing the spec sheet. .R /C Scale LINCOLN BEACHEY 1st FAI, Gene Schaffer. Airplane: • S port own “ Statesman” ST 46, 47 oz. Wing: Built-up D tube, 56 in. span. Root chord 10 in., tip chord 8 in., sweep 2 in., tip weight 1/4 oz., equal length The 1934 AERONCA C3 panels, 640 sq. in., adjustable leadouts. 18" Wingspan..... 3-50 Flaps: Root chord 3 in., tip chord 3/4 The airplane had fool proof stability in. Both flaps span 27 inches. Tail: Stab making it an ideal instruction ship. SENO 35C span 25 in., stab root chord 3-1/4 in., FOR FREE WALNUT SCALE WALNUT SCALE stab tip chord 2-1/4 in. Elevator root M o d e ls DECALS & CATALOG chord 3-1/4 in., tip chord 2-1/4 in. SEE YOUR DEALER TODAY. IF UNAVAILABLE ORDER OIRECT P.O.BOX 2527 AOO IO \ FOR ROST ACE & M ANOLING OUTSIDE U S AOO 15 V Moments: front 9-5/8 in., rear 15-3/4 LANCASTER. C A 93534 in. Engine rework: Hand fitted, full cir­ TERN AERO CO.Jnc cle crank in ’73 case, .003 ring clear­ P.O. BOX BB398 St CHICAGO, ILL., ΒΟβββ ance. Muffler: Art Adamisin, muffler pressure used. Tank: 4-3/4 oz., uniflow, home made. Plug: Fox 2 volt. Fuel: and used the ’68 wing. Flaps: Root first built. Flaps: Root chord 3 in., tip K&B 100 (X2C). Prop: Rev-Up 12-6. chord 2-3/4 in., tip chord 3/4 in. Left chord 1 in., Left flap 24-1/2 in., right Lines: 60-1/2 ft., stranded, own handle. flap spans 19-3/4 in., and right flap is flap 22-1/2 in. Tail: Stab span 28 in., Paint: Sig. Misc.: Outboard wing built 20-1/4 in ... . That’s right, outboard flap stab root chord 3-1/2 in., stab tip chord 1/2 oz, heavier by using heavier wood. is longer! Tail: Stab span 20 in., elevator 2-3/8 in. Elevator root chord 3-1/2 in., 2nd FAI, Bob Gieske. Airplane: root chord 3 in. Moments: front 9-1/4 tip chord 2-3/8 in. Moments: Front Gieske Nobler, Fox 35, Wing: Span in., rear 14 in. Plug: K&B 1L. Prop: 10-3/8 in., rear i7 inches. Engine re­ 50-1/4 in. The ribs o f a Nobler kit were Rev-Up 10-6W. Fuel: Sig. Half Klotz work: Old style case, new crank, old traced with a fat ball-point pen and then oil, half castor oil. Line length: 59 ft. re-done sleeve, single ring, new head, cut. Bob says, “ Don’t laugh. That wing 3rd FAI, Bill Werwage. Airplane: own longer rod. Muffler: Enya, muffler pres­ won the NATS twice and won the World U.S.A. 1, ST 46, 5 1 oz., plane com­ sure. Plug: K&B idle bar. Fuel: Own Championship. Sure wish I had another pleted in 72. Wing: Built-up I beam, brew. Prop: 13 x 5-1/2 cut to 11-3/4. wing like it.” The wing is straight Nob­ 62 in. span, root airfoil 17%, tip airfoil Tank: 5-3/4 oz., made by Randy Han­ ler on everything else. This wing was 16%, root chord 10.5 in., tip chord cock, suction with pressure. Line Length: completed and used on Bob’s 1968 9-1/2 in., sweep 2-3/4 in., 730 sq. in., 68 ft., solids used in AMA, stranded in plane. In 74, Bob built a new fuse no tip weight. Adjustable leadouts when FAI, own handle. Paint: Sig

DECEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 71 rules to be published in the 7 6-77 rule book will be a mess, and not too widely Greatest Book of used. The published rules will probably FULL-SIZE RUBBER FLYING be a combination of three separate pro­ posals for a Slow Rat event, and I don’t SCALE PLANS, plus think it ’s going to work. building, trimming, and SCALE MODELS ♦ * * flying instructions ever Carrier Fliers, do you feel ignored in O F W W II this column? No doubt you do, as this published! is the first item I have concerning Carrier. Sorry, I don’t fly the event (yet) so I Twelve half-inch scale © © don’t keep up with all o f the latest Car­ rubber powered flying rier stuff. Check in with R & R in MAN for Carrier items. Harry Higley is a Car­ models by some of the 12 FULL SIZE PLANS rier Freak and has a lot o f good stuff

world's best modelers, • OMUMMAM t v WILDCAT about the event. Tell ’em Dirty Dan • GRUMMAN t v HfUCAT including Doug Mc- • VOUQMT MUCOAMIR sent ya! Hard, Clarence Mather, But I do have one thing to throw out to all o f you who are into Carrier. Bill Hannan, Bill War­ • ÍOCKC WULF TA I6J ••ILL M i AiftAOOMA Have you seen the new fuel pumps and • CURTISS r-«oc ner, Bob Peck and • R47D THUNOf RSOLT large-bore carbs that Perry Aeromotive others. • P«W MUSTANG has come out with? In R/C, Perry carbs are highly regarded for their quality, • ■LMLDWO AND FtR availability o f parts, and good high speed and low speed performance. Perry makes Compiled and pro­ FEATURE ARTICLES ON duced by I.E. Coleman, A LL 1/24 »CALK BUILDING, FINISHING, AND quality stuff. (1 /2 -· V) FLIGHT ADJUSTMENTS. The fuel pumps go on the engine in edited and published place o f the existing back plate and are by Model Builder Ma- AVAILABLE NOW - $795 a diaphragm pump. The carbs are huge, gazine. as they don’t have to depend on venturi SEE YOUR HOBBY DEALER, OR ORDER effect to draw fuel. The pump forces DIRECT. ADD $1.25 FOR FIRST CLASS. fuel to the carb, just like the normal P [ Y ( CALIFORNIA RESIDENTS ADD 6% SALES TAX. pressure system you are used to seeing on Carrier and Racing engines. A t present, the pump/carb systems Santa Ana, Ca. 92702 are only available for 60’s, and then SCALE MODELS just for the Veco 6 1, O.S. Max Schnuerle 60F-SR, O.S. Max Gold Head and Black That was really a pain typing up those suggests the use o f .018 stranded lines, Head, Webra Blackhead, OPS 60, Super specs, and I don’t want to do it again which sounds OK to me. They’re plenty Tigre 51-56-60 ST Series and the Super for awhile, so don’t lose this issue of strong for the speeds these planes will Tigre G 60. MB! (You shoulda heard what our com­ be going . . . and a lot easier to get than The pumps sell for $23.95 and the poser operator had to say about it! wen) solids. carbs go for $16.95. Don’t buy just the * * * A t present, our N.W. Slow Rat event carb or just the pump. Each item is a A couple of issues back I expressed is fairly unrestricted, allowing pressure, special thing and they have to be used my opinion about the future of Rat. fast fills, etc. In the past several years, in sets. The carb won’t work properly In case you don’t recall, I said that Rat our Slow Rats have become fairly so­ w ithout the pump, and vice-versa. is dying a slow death and that there is phisticated, one-event planes, which was Although the Perry pump doesn’t probably no way to save it. Here in the not the original idea behind Slow Rat. provide as much pressure as regular N.W., most all o f the Rat fliers have So Mike also proposes to change Slow crankcase pressure, it does put out quit the event already, with most of Rat to an event that will be really slow. enough to give a good improvement in them going into Slow Rat and Goodyear. Profile fuselage planes with canopy, rud­ performance over a suction system . . . Mike Hazel, o f Eugene, Oregon, is der and separate, movable elevator (no provided you also use the matching carb, pushing to change the rules used here stabilators). Wings must be 300 sq. in. o f course. in the N.W. so we can get the Rat fliers minimum, tank must be forward of the Seems to me that an engine equipped back and also pick up some new ones. LE. Engines must be plain bearing and with a Perry pump/carb combo would Mike proposes dropping AMA Rat alto­ run on suction feed. No lim it on tank be a most attractive alternative to the gether and replacing it with a new event. capacity, but fast-fills and shut-offs normal engine pressure/fuel regulator The new event would be much like pre­ would not be allowed. Lines would be seen on most Carrier II planes. Initial sent Rat, but engines could be no larger .018 X 60, stranded. set-up o f the system would be easy than .36 and profile fuselages would We still have some work to do on enough and adjustment of top-end and be required. Planes would be like the the final set of rules to be used next low-end settings ought to be a snap. old Quicky Rat and Skat Rat. Pressure, season, but they will be basically as Also, the system should be very reliable shut-offs, fast fills, and anything else presented above. Let me know if you are and trouble-free. A number of R/C fliers you can dream up, would be legal. considering doing some changing to your in this area are using them and have Mike’s idea is that by going to smal­ Rat and Slow Rat rules. Somebody out nothing but good to say about the latest ler engines and “ d irty ” planes, speeds there must have the answer to the pro­ from Perry. should drop into the 120-130 mph blems in Rat. If you are out to set a new record in range and we could go back to flying Incidentally, there w ill be a Slow Carrier II, it could very well be that three-at-a-time. Also, equipment won’t Rat event in next year’s AMA rule book, you are going to have to use engine be quite as exotic and expensive, open­ don’t expect much. As a member of the pressure to get that last little bit of ing the door to many would-be Rat CLCB, I have been in on the voting on power for those important high-speed fliers. To help keep it simple, Mike also the Slow Rat event. I predict that the points. But if competition in your area

72 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER N E W ! R/C boat

• 45" LENGTH OVER ALL • 20’ WATER SHOT PUMPS AND GUNS • POP-OFF SCORING DEVICES • MULTIPLEX SWITCHING • INTEGRATED DRIVE SYSTEMS • "DRY FOOT" LAUNCHING and MORE ! I ILLUSTRATED LITERATURE - 50 Cents SWANK PRODUCTS CO., 729 W. 16th St. COSTA MESA, CALIF. 92627 PHONE: (714) 642 4227 doesn’t demand record-setting perfor­ mance, or you just want to break into RACEPLANES Carrier flying with a minimum of has­ THE sle, I think you ought to be looking at PLANKTON BOATS the Perry pump/carb combos. By the way, K&B put out the .61 CATALOG R/C engine with a Perry pump/carb descri bes already installed. Check it out. the most practical * * * radio controlled boats My Sig kit of the P-51 Stunter is in the world . done now, and I have about 20 flights S C A L E D W G S on it. It takes a while to get used to a SEND 1.00 FOR IT TODAY. new Stunt ship, but so far I am pleased Quick easy reference brochure identifying over 700 Raceplanes, 1908 to present. with mine... I better qualify that a wa It w hi p p ο little. I am convinced that the best fly­ Send 50< for Brochure to: PLANKTON BOATS ing Stunt planes are built from scratch. 110-M sunset drive You know ... hand-picked wood and KS HIRSCH 8439 Dole St. cocoa beach,fla.32931 all that. I decided to build Sig’s P-51 Buena Park, Ca. 90620 because it is easy to build (I needed a plane in a hurry) and looked as if it be the last. The engine is really great. “ Let’s see, that cigar is a dollar eighty- would fly OK. And it does... Fly OK, Lots of power (maybe even too much five.” that is . . . Not like a top-level Stunt for the P-51, which is a little on the “ I don’t want a whole box Can I plane does, but it flies very well for a small side) light weight, easy starting just buy one?” kit-built plane. and a nice, consistent four-cycle. Only “ They cost a dollar eighty-five each, I set my plane up exactly as shown problem with the engine is that there sir.” on the plans and I am very pleased that isn’t a good, light muffler available for “ You're kidding! A buck eighty-five the control horn for the elevator is ex­ the engine that can be bought in your for one little cigar?” ternal. With everything installed per plan, average hobby shop. O.S. does make “ Yes sir, th is . . . ” the flaps have way too much movement. a muffler for this engine, but it is held “ You don’t have to call me sir. Not By moving the pushrod up one hole on on the engine with a strap and that if you’re going to rape my billfo ld .” the control horn, I got more elevator means cutting yet another hole in my “ Right, turkey. If you expect to movement and the plane flies better this cowl for access to the strap. And the walk out of here with this cigar it ’ll way. I can go up one more hole on the muffler has to be removed before you cost you a dollar eighty-five. Plus tax, control horn and probably will before I can take the cowl off. Too bad O.S. o f course. If you want it, OK. If not, go flying next time. quit making their small muffler for this please leave. Your gnashing o f teeth is As the plane was built for practice engine. It was light and was held on by bothering the other customers.” flying, I used Monokote on the flying a single bolt through the muffler and What could I do? I bought the cigar, surfaces just to make life a little easier into the threaded portion of the ex­ picked up a Semco adapter and a 1/2 (and the plane a little lighter) and painted haust stack where the R/C baffle is inch extension and made a muffler that the fuselage with Hobbypoxy. The fuse attached. didn’t work. Vibration got to the cigar came out pretty nice but the Monokote Having decided that I just had to tube on the very first flight, cracked it is another story. I never have liked have a muffler of some kind, I thought all to pieces, and it fell off. I know the covering with plastic films of any kind I would make one out of a cigar tube. cigar tube could be made to work. But and my covering jobs show it. A few Stopped into the local smoke shop I don’t dare go back to that cigar shop little wrinkles and a whole bunch of and asked for a cigar in a tube. The to buy another one. dents in the wood. Oh well. It is a prac­ biggest one they had. tice plane after all. When I go flying, “ Yes sir, we have cigars in a lube. Right now I am using a short piece Stunt planes go in first and Combat What brand would you like?” of thin-wall aluminum tubing as a planes get stacked on top o f the Stunt- “ Couldn’t care less. I want the biggest psuedo-muffler. It doesn’t muffle at all ers, so the plane is going to get dented one you got.” (the tube is constant diameter and there up a little anyway. (Sounds like Dan “ That would be this Dunhill cigar, are no baffles in it) but it does direct a needs a few lessons, Sid. wen) sir.” lot o f the exhaust noise back along the For power, I settled on an O.S. Max “ Yeh, that looks about right. How side o f the plane (Along with all of the 35. This is my first O.S., but it won’t much?” exhaust gook) so I don’t have to listen

DECEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 73 INEXPENSIVE FUN-FLYING Model Aeroplanes IS BACK-W ITH .074 & .11 (1 A Splendid Gift Bill Hinrun’t Peanut ver­ sion of the “ Id e a l" Nieu- port Baivwood and balsa construction, tissue cov­ ered Complete kit white tyred simulated spoke wheels, plastic prop and thrust bearing, pnntwood. feed, rubber strip and detailed Instruction Manual S-* 49 (S5.00 securely packed and post paid). N.J buyers add S'*· sales tax.

INCLUDE:TANK*EXTRA Peanut Plan Special Five Peanut Size K it Plans. WWI and Golden Age Biplanes. S1.50 post paid. Scratch Builder Super Art*£RS JU 52 urtxM«* mMPc· ντο wo νω »■ v w . 11 to Offer' Plan set and pnntwood for all five models 55.00 post­ GLOW HEAD «WRENCH RXlRNiER RF-5 « ο *» fo m m o w o t· tfo nsu evw *. t · » paid \ J. buyers add sales tax R jeeE R STOOGE P U N S (PROP NOT INCLUDED) OWOMWOnt Si MU X> W9M· MB UM> MOUU VINTAGE AERO 20-page Catalog SI 00 OttJMMI WUC MCLi MC -OU «V DEALER INQUIRIES INVITED C rtia w COMO u k h « » <μ « ο μ ο ι OMiiJon »»a* mo j u u m t · oo VINTAGE AERO d.tc. d c /iq n 1 THE GLEN · TENAFLY. N. J. 07670

to the bark of the motor while flying. DT fuses at the next F/F contest. Bob A rt Adamisin makes a really good- Stalick would be very impressed . . . · looking muffler for the O.S., so I am going to get one to try. I’ll let you FLIP START *7.95 know how it works. Tethered Cars . Continued from page 39 I’ve got to quit writing. I’m getting type universal, as in a conventional car, a little dizzy. Waste not, want not, so coupled to a spur gear drive? It took I am smoking my $1.85 cigar as I write some fancy design work but I have this. It has to be the strongest cigar I started on a design like this. If I ever have ever smoked. Does burn slow, finish it, I may be a winner... that is though. Should have saved it for lighting if I ever finish it. RESULTS AMERICAN MINIATURE RACE CAR ASSOCIATION August 21—23, 1975 CLASS I COLD 1. Bill Pistoli Arrow Dooling 130.24 2. Ed Baynes Arrow Dooling 129.87 3. George Bryant Arrow Dooling 109.22 CLASS II HOT 1. Roger Phillips 2 Arrow v.J. 146.34 2-. Roger Phillips 1 Arrow v.J. 144.92 3. George Cooley, jr. Arrow Dooling 113.49 CLASS II COLD 1. George Cooley, Jr. Invader Dooling 105.75 RECOIL START * 9 .9 5 CLASS III HOT 1. Loyd Torrey Rouse v.J. 151.26 2. Roy Torrey 1234 v.J. 151.26 3. Ben Laureano Frypan O.P.S. 147.78 4. Bob Sorrell Frypan O.P.S. 138.46 5. Ted Maciag 1234 v.J. 138.46 CLASS III COLD 1. Loyd Torrey Rouse v.J. 138.46 2. Bob Murphy 40 Car K&B 125.87 3. Bob Murphy Rouse v.J. 122.78 4. Bill Dyer Davis Rossi 122.11 FLIP START * 8 .9 5 5. George Bryant Bryant Slab Dooling Pass SPARE PARTS CLASS IV HOT T Glow Head-3 for $2.00 1. EdTurnross Papina McCoy 112.35 'll’ Glow Head-3 for $2.50 2. Ted Dodd Papina Hornet 106.38 T Recoil Starter....„$1.50 CLASS IV COLD Ί Γ Recoil Starter $2.00 1. Bob Murphy Dooling/F McCoy 84.98 BLUEBOOK OF HOBBIES CATALOG 160 TABLOID-SIZE PAGES $3.95 CLASS V III (inc. spurs) DEALERS/WHOLESALERS 1. Mike Lepurage Spur Dooling 104.52 WRITE: POLKS 346 BERGEN AVE. 2. Chris Lupo Matthews Hornet 59.24 JERSEY CITY, N.J. 07304 3. Mike Lepurage Spur Dooling Pass POLKS HOBBIES MITES 15-19 & 29’s 314 Fifth flve., NY., N.Y. 10001 D e p tM B 1. EdTurnross Turnross McCoy 84.19 2. Butch Williams 73.11

74 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER BETTER THAN A THIRD HAND!

TYRO PLAYBOY SR. 80" SPAN . . . this beautiful Monocoupe by Megow? Old Timer R/C or F/F. Wing ribs, p ly­ One of the four most super-detailed wood, pylon, and all curved parts milled. plans that Megow ever made. Formed wire gear. Stressed for R/C. We have this, plus many others, print­ Meets all Ο. T. requirements. ed in clean black line. For catalog, send $39.95 Postpaid .δΟ6. refundable with first order. TYRO MODEL & SUPPLY GOLDEN AGE REPRODUCTIONS P, O. Box 13, B raintree, Mass. 02184 P. 0 . Box 11511, Palo A lto , Ca. 94306 Phone: 321-2898

CLASS V EXPERIMENTAL 1. Garold Frymire Frypan Mk 5 O.P.S. 170.45 2. Chris Lupo Frypan Mk 4 O.P.S. 168.85 3. Loyd Torrey Frypan Mk 4 O.P.S. 168.85 4. Tonnie Pegue Frypan Mk 4 O.P.S. 168.53 5. Roy Torrey Frypan Mk 4 O.P.S. 167.59 6. Ray Yates Frypan Mk 4 O.P.S. 167.28 7. Paul Kruse 1234 O.P.S. 165.44 PANAVISE TILTS, TURNS, AND 8. EdTurnross Frypan MK 4 O.P.S. 164.53 ROTATES TO ANY POSITION. 9. Jack Boudakian Baynes O.P.S. 161.29 IT HOLDS YOUR WORK 10. Ted Dodd Frypan MK 4 O.P.S. 160.71 EXACTLY WHERE YOU WANT IT. TRACK RECORD PanaVise has great strength yet is gentle enough to firmly hold delicate objects. Garold Frymire Frypan MK 5 O.P.S. 170.45 Quite possibly the finest new tool RUN WHAT YOU BRUNG PREDICTED SPEED ACTUAL SPEED you will buy this year, PanaVise is 1. Mike Lepurage 100.00 96.67 under built to exacting professional 2. Ben Laureano 151.00 138.88 under standards. We guarantee it! 3. Phil McDonald 153.77 139.75 under Illustrated is the $19.95 general 4. Jerry Anderson 125.00 156.52 over purpose Model 301. Three other 5. Bill Dyer 100.00 102.62 over bases and a wide variety of heads are available. All interchange! Buy BEST ENGINEERED: Ray Yates. the basic unit, then add on to BEAUTY CONTEST: Ted Maciag. create a system. 46 Entries — States Represented: California, Colorado, Georgia, Indiana, Available through your dealer. New Jersey, New Mexico, New York, Ohio, Pennsylvania. Write lor a free catalog.

Remotely .... Continued from page 16 came by the judges table, and almost Dept. 10S furtively, pressed a souvenier medal into One other comment about judging. 10107 Adella Ave., South Gate, CA 90280 It is a tough job. A contestant is "on” the hand of each judge. It was similar In Canada: 25 Toro Rd., Downsview, Ont. for about 10 to 12 minutes, maybe twice to watching a small-time fence artist M3J 2A6 a day . . . a judge is “ on” from the first passing stolen goods. Whoopee. flight in the morning to the last flight Anyway, back to procedures .. . I A Division of Colbert Industries in the afternoon or evening, and he had Treatment o f the press. . . It continues to watch each and every maneuver of to amaze us how, year after year, the each and every contestant. If the sun modeling press is handled like an unin­ is hot, he boils; if it rains, he gets soaked; vited guest at World Championships. If if it turns cold, he freezes his butt (and these folks weren’t there, at their own FLY H00Ktm if it doesn’t get frozen, it gets numb time and expense, to record the event in anyhow, from the long hours o f sitting). words and photos, the modeling world The recognition afforded the judges in would have todepend on word-of-mouth The only light, ad­ Switzerland was not unusual . . . it was to find out the results, and learn what justable tow hook par for the course. At the banquet, when happened to whom, and why. guaranteed against everyone had finished eating, they had In Berne, for example, responsible col lapse or breakage the award ceremonies. Following intro­ members of the w orld’s modeling press ductions of contest officials, and talks by were continually being shooed away local dignitaries, the individual and team from the action by our flight line direc­ $1.75 postpai d (Az . winners were called up to receive their tor, who on his own, created more dis­ res. add 5% tax) trophies. Following that, all team man­ traction than all the press put together. agers were called up to receive souve- He was constantly strutting up and down GLIDER GUIDERS nier medals of the 1975 World Cham­ the line, in front of the judges, chat­ P.0. Box 1400 pionships, and following th a t. . . we tering like a one hundred and eighty Phx . Az.85073 went back to eating and drinking. While pound magpie, into a shoulder harnessed we were thus involved, a meet official walkie-talkie that was totally unneces-

DECEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 75 MODEL A-Standard Kit

The Model A will sand precise angles on Wood, Slyroloam, P la s tic or any other sandable material. U n iq u e reversible sanding block accommodates two grit sizes, tor instant grit changes. Complete illustrated instructions make the MITER-SANDER Kit a snap to build, includes all necessary hardware, all parts accurately pre-cut. only plus $1.50 MODEL B - Deluxe Kit $24.95 postage & handling This Deluxe Model will do everything the Model A can PLUS: Measure and Sand DIHEDRAL ANGLES into Foam or Built- up Wings up to 14V2"in chord Larger sanding block and greater bed capacity lor sanding larger and longer parts. Send Check or Money Order or C O D N Y residents add 7% sales tax DEALER & DISTRIBUTOR INQUIRIES INVITED

at it again this year! (In Bremen, 1969, Actually, the situation is not serious, we insisted on writing down scores, and the solution to the problem is not What's the difference rather than relaying them by push­ d iffic u lt. . . it just needs to be stated. button directly to the computers. O f­ First o f all, the C/N and C/E titles in between Permagloss ficials ran the computers anyway, since proposal 13 become null and void (Ka­ they were all set up, and they crapped put?), as they are eliminated by proposal Coverite and all of out on the first flight!). 11. The former D/N now becomes “ Expert,” and the former D/E becomes As mentioned last month, the com­ the plastic films? “ Master.” puter prinl-out dropped each flyer’s As to which maneuver schedule is Perma­ lowest score and showed only the three Plastic flown, looking at proposal RC-76-14, gloss that counted. Consequently, after the Film this can be the choice of the contest Coverite contest, no one could tell which score sponsors, but it must be announced in was made in which round . . . Great! Requires paint No No pre-contest advertising. One choice is We have mentioned only a few con­ test procedures that must be standard­ that, in accordance with proposal 14, Can be ironed on Yes Yes the “ Expert” pilots will fly the new ized and followed exactly by each host­ Expert Schedule o f 14 maneuvers, and Goes around ing country. In an effort to compile a Yes Yes the "Master” pilots will fly the full FAI compound curves complete proposal on this matter, we invite comment from those who have pattern. The other choice, which is sim­ Scratch resistant Yes No witnessed, or been a part o f World ilar to the current situation, is that both Championship competition, and who “ Expert” and “ Master” can fly the full Puncture resistant Yes No have noted procedures that must be FAI pattern, with separate awards being standardized in order to assure more made for the two classifications. The Sagproof Yes No smooth-running and equitable compe­ latter choice is the easiest and least con­ fusing to administer and judge, from Takes all decals tition. Yes No * * * the contest sponsor’s point o f view. and trim WHOOPS! AIR-TO-AIR PHOTO TRY PERMAGLOSS COVERITE - In case you don’t see it in AM A’s jim Houston, of San Antonio (or is it THE DIFFERENCE IS OBVIOUS! magazine, we’ve already had to issue Jim San Antonio, o f Houston), Texas, a clarification on the new Pattern rules has sent us what may be the first air-to- See your dealer first. If he does not carry for 1976-77. This came about because air photo ever taken of a model, by a Permagloss Coverite send check or M.O. three of the proposals which were just model. for S8.90 per roll (38x46) of red, white, voted in by the Contest Board have Jim installed a Cannon Dial 35 camera blue, yellow or orange to: Coverite, 112 a certain amount of overlap that could in his O.S. 35 powered, Sig J-3 Cub. Chestnut, Philadelphia, Pa. 19106. lead to some confusion. This one pound camera has a spring- The three proposals are a follows: wound shutter/film advance mechanism, RC-76-11: Eliminate present Class C which permits shooting numerous half­ sary because you could hear his voice all and adopt the Sport Biplane event as put frame 35 mm photos on a single flight, the way to the French border! forth by the MABA (Miniature Aerobatic using a servo operated shutter release. Members of the Modeling press (note Biplane Association). The camera is mounted to shoot out the underline) should be individually iden­ RC:76-13: Change contestant classifi­ open scale door, making the photos tified and given specific priveleges as to cation titles from A, B, C/N or DN, and on a single flight, using a servo operated times and places they may trespass the C/E or D/E, respectively to Novice, shutter release. The camera is mounted hallowed area around the flight line . . . Advanced, Expert, and Master. to shoot out the open scale door, mak­ no more, no less! RC-76-14: Replace A, B, and C pat­ ing the photos more realistic because Tabulation is another area that needs tern maneuvers with three new schedules, every exposure includes the bottom o f standardization. Though it probably did with maneuvers and upwind/downwind right wing and the wing struts. It took not affect any of the relative standings, sequence derived from the current FAI 17 attempts at one session, to get the no one noticed until it was too late pattern. air-to-air shot o f the Ugly Stik which is that tabulation would be dropping the The confusion obviously stems from reproduced on one of these pages. high and low scores of each maneuver, the fact that proposals RC-76-13 and 14 Unfortunately, the Cannon Dial 35 rather than each complete flight score! have to do with a new name and a new is no longer made, though it may be Of course, this would be a hopeless task pattern for Class C, whereas proposal possible to pick one up in a shop that to do manually, but the computers were RC-76-11 eliminated Class C! carries a large selection of used cameras.

76 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER NEW. TEMPERATURE COMPENSATED NYROD A ROD FOR ALL SEASONS

NEW 8' METAL ROD IS PERFECT FOR THESE INSTALLATIONS - BEND AS NECESSARY

NEWI 8" METAL ROD SU-PR-KLEVIS

This camera is ideal since, in addition took a light line to a small island where to the motorized shutter/film advance, a couple were stranded. Using this, a it has an automatic lens diaphragm, life raft was pulled to the island, and STRAIGHT SERVO ARMS thus ensuring correct exposure from then the raft, with the people aboard, most any attidude. was pulled to shore by a heavier line SNIFF, SNIFF which had been attached to it. If the above report gets you to think­ ... Ya know? It just might not be a ing about unique uses for R/C model air­ bad idea if some of us were to acquaint craft, try the following on for size: our local police forces with the capabili­ A clipping from the Fort Worth ties we can offer along these lines. If any ‘‘Star-Telegram," October 17, 1975, of us could be of use in an emergency reveals th a t. . . ‘‘The Flarris County situation, we would not only have the (Texas) Pollution Control Department satisfaction of lending a hand, but we has formed its own dirty air force . . . would also enhance the image of model­ a model airplane capable of lightning ing and put ourselves in a better bar­ These servo arms are longer then the ones supplied with your radio and of swift samplings of emissions from indus­ gaining position relative to flying sites and unfair complaints. · course will give more surface movement trial smoke stacks in the Houston area.” from your servo. Arms are molded from The newspaper story goes on to say R/C Auto . . . . Continued from page 29 NYLON and can be cut to any desired that the “ smog spies” are really shaking 9. Calculate the average front stiff- length. Order by Stk. No. up the polluters. In the past, pollution ners by control officiers had to monitor manu­ S(F) = S(LF) + S(RF) -r 2 lb./in. 2 Arms — .98« facturing plants’ emissions from the pro­ The two front stiffness numbers are Stk. No. 31 fits KPS-9 perty line, where bad weather and strong probably closer together than the rear Stk. No. 57 fits KPS-10 Stk. No. 58 fits KPS-11 winds made measurements almost im­ (unless the chassis is really tweaked) possible. Stk. No. 59 fits KPS-12 because the weight is further away. One Stk. No. 60 fits KPS-14 & 15 Officials are getting reactions from can visualize that the softer rear tires Stk. No. 61 fits World Eng. the polluters similar to those who object will provide some decrease in the rear Stk. No. 62 fits D&R to radar speed control on highways, and roll stiffness. Stk. No. 63 fits KPS-14 & 15-11 expect the first court test case to come One o f my cars, with the body and Stk. No. 66 fits EK servo after the first of the year. However, wing on, has a front stiffness of 10.0 Add .25« on direct orders. the collected samples and techniques Ib/in. and a rear roll stiffness o f 8.1 meet all the requirements that courts Ib/in. Based on these numbers, my car ROCKET CITY SPECIALTIES have needed in past cases. is set up about right. I was very sur­ 103 Wholesale Ave., N.E. STRING ALONG WITH AKITOSHI prised by these numbers. However, since Still another R/C model adventure . . . more weight is on the rear wheels, they Huntsville, Ala. 35811 According to a report (with photos) in should be harder to lift. During corner­ the "National Enquirer," June 10, 1975, ing, more weight is going to transfer at the Yamanashi (Japan) Police District the rear. In my road car, the total weight after the chassis deflects the equivalent reports two situations in which a radio is about 5.5 lbs, with 57-43 weight dis­ of .043 inches, the front and rear axles controlled model helicopter, built and tribution (calculated from the individual have deflected the same amount... any operated by Akitoshi Tsukahari, saved wheel forces). If there is a total weight further chassis deflection will load the a total o f seven lives. transfer o f one pound, a first approxima­ outside front tire more than its propor­ According to Yamanashi Police Chief tion is that there will be a 0.57 lb trans­ tionate share since the front has already Hidetashi Akaiki, the chopper took a fer at the rear and 0.43 lb transfer at deflected its free amount and the rear light lead line to the top of a mountain the front. Hence the uncoupled (or free) has not yet reached its free deflection. ledge where a family o f five had become rear deflection would be .070 inches The rear end weight transfer will conse­ trapped following a picnic. It was near (0.57/8.1), and the uncoupled front quently be a little lower. So, the front dark, and the temperature was expected deflection .043 inches (0.43/10.0). You and rear roll stiffness numbers should to drop to 2 above zero. The light line can see here that the rear deflection be divided by the amount of weight was attached to a heavy rope, which the wants to be more than the front, which they carry to find the effective roll stiff­ father pulled up and secured to a rock means that the effective rear roll rate ness numbers. so that rescuers could climb up and is lower than the front. Hope I haven’t lost you this far in bring the mother and 3 children down. The actual chassis deflection can be talking about current cars. The above In a another situation, the chopper envisioned in the following manner; roll stiffness factors are considered in

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and when weight transfer is minimized. power is applied to the rear wheels. Track conditions, such as a dusty sur­ Cars with a light rear end already have a face, can change these characteristics. slight problem with rear traction during COVERUP! Anyhow, if a car always has problems power application, and the rocking front Sturdy, dark green vinyl covered with the front end not providing enough suspension tends to aggravate the prob­ binders for your valued copies of turning force, a front suspension can lem. Hence a lot of Thorp cars run with MODEL BUILDER. Gold logo. help. Suspension provides the front of differentials which limit the amount of the car with a decreased roll rate, so power that can be applied during cor­ that less weight is transferred . . . there­ nering (by letting the inside wheel spin fore front traction and side force during freely when it lifts off the ground). cornering, remains near maximum. At There are still a lot of things which I the same time, more weight transfer don’t fully understand about rear “ rock­ occurs at the back end and there is a er” suspension systems. Again, the gen­ reduced side force capability. So when eral idea (of the rear rocker) is to im­ you do something to help the front, prove traction, but funny things can you hurt the rear. Hence only small happen. Only one car that I know o f is changes should be made. sold with a “ rocker” rear end, the A-D, Usually cars which have a lot of sold in the San Jose, California area. weight on the front wheels (45% to 50%) Several others, which are scratch-built have an understeer problem. First the or test units, were on HRE and Scor­ weight is high, second the weight trans­ pion cars, and also NorKar, a couple of fer is high, and third, harder and nar­ years ago. When the rear rockers are rower front tires are normally used to rather free, the cars exhibit severe under­ Only S4.95 each, two for $8.95, or give the car reasonable low speed hand­ steer at high speed, and power oversteer three for $12.95, postpaid in the US. ling characteristics. at low speed . . . not very desirable char­ Canada and Mexico add 30 cents per Two cars currently manufactured have acteristics. The rocker rear end does binder. Overseas add 50 cents each. front suspensions, or a normally avail­ keep the rear tires on the track better California residents add 6% sales tax. able front suspension: Delta and Thorp. during cornering at speed . .. but a lot NOTE: One binder will hold 1971 and Both of these suspension systems are of weight transfer occurs at the front, 1972 issues. One each for 1973 and 1974. called “ rockers.” The front axle is pi­ decreasing front traction. With even what voted on the car axial centerline and seems to be a reasonable amount of MODELS' rocks in the lateral plane. The Delta rear rock, the inside front wheel will car normally has the majority o f weight lift off the track, obviously reducing BUILDER on the rear wheels, and the front action front traction. To combat this problem, Box 4336, Santa Ana, Calif. 92702 is highly snubbed. In fact, the front the Scorpion car I saw had the rear axle motion is normally only used to wing mounted to the main chassis plate, the same manner for cars with suspen­ provide adjustable chassis “ tweak.” The not the rocker, to attempt to hold the sion. However, it should be noted here Delta car really doesn’t need front sus­ front wheels on the track during cor­ that aerodynamic forces and front end pension. nering at speed. But rear rockers (with geometry can alter these roll stiffness Thorp cars, on the other hand, have rather free motion) also have a power values during cornering at different quite a bit o f weight on the front wheels delivery problem with low speed rear speeds. But I don’t want to get into that because of the lay-down engine and/or end traction. When accelerating from yet. the belt drive. Consequently, the Thorp low speed, the rear end gets loose pretty Some of the things I have talked front end suspension has more motion, easily, even in a straight line. Possibly about here assume you know a little but it is too hard to be reasonably lim ­ the rear end wiggles too much because about tire traction (for instance). A pre­ ited. Usually heavy rubber bushings are there isn’t enough damping. To get my vious article on “ Tires and Weight Dis­ placed on the axle and provide rather HRE rear rocker to work properly at tribution” explained some o f the details. stiff springing. As was stated earlier, on­ both low and high speed, I had to really If you want a copy of that, or any other ly a little front end motion is required, restrict the rocking motion. All that my article, write to me at the address given since rear traction is decreased while car ended up with was a little more rear at the end of my column. In general, front traction is improved. Front rock­ end flexibility! the tire article explained that tire trac­ ing action will very quickly change un­ So it seems that any suspension sys­ tion is best when it is lightly loaded dersteer to oversteer, particularly when tems for R/C cars really only has to

78 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER BIG BIRD PERFORMANCE ON A SMALL FUEL BILL. Swept wing and progressive airfoil fo r superb handling over a wide speed range. A I I balsa construction on a flat board. Basic box fuselage and sheet tail. Optional spinner or chopped nose. Premium machined hardwood and balsa. Formed tricycle gear and canopy. Complete drawings, instructions, photos. For 15 to 25 engines. Span 44 in, area 350 sq in, 2 to 316 lbs. TOM KITTY M k15 36.95 Send stamp for brochure.

12111 BEATRICE STREET, CULVER CITY, CALIFORNIA 90230.

provide a very small amount o f change quite a turnover of people as the specta­ for front and rear roll stiffness. Several tors went to their grandstand seats and things that suspension systems can pro­ new arrivals stopped to watch. As soon fPEA POODESIGNED BY vide are damping, controlled roll stiff­ as the big F-5000 cars would get on the Tom Protheroe ness, and spring rates both front and course the crowd would dwindle to a few rear. I think damping is a very important and most of the R/C car drivers would AM Y A thing here, and suspension is not practical disappear to watch the big cars practice. CLASS unless there is good damping. Current But I think we exposed quite a number 709 361600 plate type chassis do give roll stiffness o f people to R/C car racing. eos and some flex springing, but they are Moe Loara did a great job o f organiz­ not controlled and there is little damp­ ing and being race director at this de­ ing. So there is still a long way to go. monstration. All the drivers I talked to My next article on suspension systems had a great time and enjoyed watching will get into the more sophisticated ap­ the F-5000 cars practice. Thanks Moe, proach to suspension. I'll cover the full and thanks to Jim Cade, who also put in front and rear suspensions that I ’ve seen a lot o f effort too! and comment on them and try to tell Well that's it for the month. If you you what I think we have to do to get have any questions, comments, or want a good suspension system. to get back articles (35^ each), write to me c/o MODEL BUILDER, or to Chuck LONG BEACH GRAND PRIX Hallum, c/o HRE inc, P.O. Box 4658, DEMONSTRATION REPORT Irvine, CA 92664. · Thought you might like to read about an interesting demonstration of R/C F /F ...... Continued from page 49 WRITE or CALL 213-661-792B cars we had in Long Beach, California, sions, built by Werner Thies, is equipped FREE CATALOG $ 2 9 . 9 5 on Sept. 27 and 28, 1975. The demon­ with the Go. 795. This model possesses KIT FEATURES stration was part of the Long Beach very good flight characteristics and high • COMPLETE SAIL CONTROL MECHANISM Grand Prix (LBGP). Moe Loara worked performances. • MACHINED WOOD AND METAL PARTS very closely with the LBGP Association • COMPLETE BASIC HARDWARE PACKAGE A Wakefield model was built to test • ALL RIGGING & A FULL SAIL PLAN to acquire a site and make all the ar­ a wing with the Go. 795 section. For • A BASIC COURSE 'N SAILING rangements for the demonstration. On a wing chord o f 5 inches, the rib spac­ RIC SAILPLANES » ACCESSORIES Friday, only about six drivers and cars ing was I inch. Sag between wing ribs AVATAR7S S 32. 9 5 CURIO S 4 4 . 9 5 were on hand since a track was not set was very slight, but initial test flights HI-STARTS - PAR ACHUTES ■ RUBBER up. Even at that, several of the big car were disappointing. The glide, when DEALERS Λ DISTRIBUTORS STD. TERM drivers were pretty interested in our handlaunched, was very flat and the M S LIMITED "little toys.” model behaved in the expected manner. P.O.BOX 3 0 7 4 8 About 24 drivers and cars that were When we check the airfoil charts of L.A. CA. 0 0030 ) invited showed up on Saturday. The the Go. 795, we find that it attains its early birds set up the track perimeter optimum lift value quite near the stal­ guarantee optimum performances for barriers, chalked the track and put down ling point. On a comparatively small model work. Contrary to common opin­ the corner boards. At first, the track model having a wing with no washout, ion, flat bottomed or only slightly con­ was a little slippery, but as the day asymmetrical stalling o f one wing panel cave sections are not only advantageous wore on, the traction got reasonably is bound to occur under transverse flow from a constructional point of view but good. The LBGP Association had re­ conditions; this in turn results in quite they seem to be superior performance- quested that we run Formula cars on a uncontrollable flight behavior. Slight wise at low Reynolds numbers. To be­ road course, so we noticed the traction washout should therefore be incorpor­ lieve that the performance o f a model is problem a little more than usual. ated in the outer wing panels, when solely governed by proper airfoil selec­ We got in several practice rounds be­ using such airfoils. tion would, however, be incorrect, since fore the LBGP spectators started to RESUME other factors must also be considered, arrive. Then we began a continuous Werner Thies, in his research, has which may well have a more decisive series o f 10-lap heat races so the specta­ evaluated new scientific data. These the­ influence on the final results. tors could see a lot of action all the oretical results and practical data indi­ 'POXY PAINTIN’ POINTERS, by Steve lime. There were about a hundred peo­ cate that the commonly used thin and “ The Batman” Helmick ple watching at any one moment with heavily cambered modern airfoils do not "In the last ten years, I ’ve used four

DECEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 79 WRAM SHO W 1 9 76 Febuary 28 & 29 Westchester County Center, White Plains, N.Y. 1976 Promises to be the Biggest and Best Yet! It's WRAM's SHOW time again and 1976 is shaping up to be the largest Show ever... 3 full floors of the Westchester County Center with well over 100 manufacturer's booths, thousands of square feet for models and a whole third floor for the Swap Shop. Make sure that you finish up your latest creation so you can have a chance to take home one of the dozens of trophies to be offered in these events WW I, POST WW I (Military), POST WW I (Non-Military), PATTERN, SPORT WRAM«& BIPLANE, OLD TIMERS, SPORT, PYLON GLIDERS. HELI­ COPTERS, R/C BOATS, STAND-OFF SCALE. BEST JUN­ WESTCHESTER RADIO AEROMODEIERS. INC IOR AND BEST-IN-SHOW. Special Swap Shop Note Over the past few years, the Swap Shop has been inun­ dated with built-up models making it extremely difficult to fairly display them all. To provide maximum exposure of each built up model on display in the Swap Shop 1976 Show hours are 10 AM to 6 PM on both days. Swap Shop Registration lor complete models and air­ It’s a weekend you can’t afford to miss . . . frames will be limited to one per registrant. see you there. Make sure you make your plans now . . . 1976 will be the For further information, write to Frank DeVore, biggest and best WRAM's SHOW ever! 18 Grove Ave., Larchmont, N.Y. 10538. different brands o f epoxy paints, includ­ add some micro balloons for filler. Wet- thinner. Mix the paint at least two full ing Woolsey and Poly Aqua boat paints. sanding works wonders on polyester days prior to your EDS (estimated date Back when I flew Ukie speed (tsk, tsk), resin, but scraping with a sharp razor o f spraying). Thin it at the 24 hour the boat paints seemed durable, but I blade works very well on a hard surface point, and let it sit another 24-48 hours, really couldn’t swear to it. They also like spryce, plywood or basswood. at room temperature, in a sealed, clean seemed to give better results, but now There are several brands of polyester bottle. Seldom is it necessary to mix that I’ve tried both Hobby Poxy and coating resins available from Prather more than one or two ounces o f paint, K&B Poxy using the same techniques, Products, K&B etc., but they are all and frequently you will finish the job they work very well too. This article is just coating resins. One thing with poly­ and still appear to have as much paint to let you know how to do it right the esters is that you gotta use fairly fresh as when you started. Or even more!! first try, so you won’t go away swearing stuff. Don't take a chance with that three (Steve has been sniffing the epoxy again, at the stuff like I did. year old can you left from the boat! Bill.) “ Preparation for painting is the se­ It may not harden. “ Application o f the paint is also very cret to getting a good finish, as with “ Preparation o f the paint is very im­ important, and here, the time honored any kind of paint or dope. The best portant. If the instructions say to mix brush doesn't cut it. Spraying gives far thing is a good coating o f polyester resin, 50-50, do just that. Then forget every­ superior results, and a small cheap air For balsa with open grain, you should thing else. Do, however, use the proper brush is the most suitable. I’ve used a

DATE RECO. SOCIETY OF ANTIQUE MODELERS

MEMBERSHIP APPLICATION NO. DO NOT WRITE IN THIS 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 MODEL BUILDER Magazine subscription. Give S. A. M. No. when subscribing. A. M. A. ______NO______Enclose Membership Dues of S3.00 and send to: Society of Antique Modelers Μ. E. C. A. ______NO______1947 Superior Avenue S. A. M. CHAPTER ______NO______Whiting, Indiana 46394 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. Signed

8 0 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER $40 spray rig, an Ambroid Sprayer, which is an aerosol type, and a Badger OLD-TIMER R/C Airbrush. The Badger is perfect. Guntis SCALEO FOR .049 - .15 POWER Sietins tells me he has a Badger and a "Small enough for a schoolyard-large enough to compete." Miller Airbrush, and likes the Miller bet­ ter, but I don’t know how expensive it is. The cheap Badger will do all we’d normally ask o f it. The expensive Bad­ ger, etc. are only used for fogging, Authentic Scaling creating splotchy camouflage, and that Full Size Detailed Plans Machine Cut Parts 1940 Mercury “aged look” on scale or custom paint 45“ Span work. The Badger is adjustable for va­ Selected Balsa & Hardwood 300 sq. in. rious spray densities, and really works 28oz. w/3ch. well. It is also very easy to clean. The $24.95 one with the smallest bottle is probably MICRO MODELS best for our use, and if you need more P.O.BOX 1273 - A Mall orders: Add 10% lor postage A h a n d lin g paint capacity, you can get a bigger COVINA, CALIF. 91722 Calif, residents add 6% sales tax bottle for it. “ There you have an easy way to get a very good finish, with durability far WACO ATO · GULFHAWK ΙΑ ·0 *43 Α superior to normal dope finishes.” X THE LARGEST NIGHT FLYING . . . Hand Launch g S PLANS COLLECTION! Gliders! SCALE 00 • X We have all read about it, and many > 2 have actually flown at night, using chem­ PLANS < ^ O. T. F/F L IS T ...... 75* ical lights, so that we can keep our eyes byWESTBURG ^ RUBBER/TOW L IN E ------75* on the drifting ship. Some use battery- ______01 H Ο. T. FLYING SCALE - - - 75* powered lights and on a clear night, 30 X 40 DETAILED * 0 it ’s amazing how long you can see these BLACKLINE PRINTS * J ships as they join the lights of the stars. ------5 O JOHN POND In a recent issue o f the Airfoiler, SEND S.A.S.E. < j; there was a bit that caught my eye. • r^» FOR COMPLETE m £ Old Time Plan Service Night flying Hand Launch Gliders. How? * T PRICE LIST ϊ ώ *7 O P.O.Box 3113 n * Battery powered lights? Chemical lights? Q * San Jose, Calif. 95156 Nope. Chuck Anderson, editor, reports Μ O PETER WESTBURG ξ g > “■ 834 Seventh St. No. 6 < £ Phone (408) 292-3382 it this way: “ While watching the night < flying, one of the California flyers sud­ O Santa Monica, Calif. 90403 55 denly said, ‘Look,’ and pointed towards the dorm. I turned around but the only model building or flying, here are 10 2. I don’t have the time. thing I could see was some lightning tried and true responses which you 3. You’re right in theory, but ... bugs. He then asked if those were fire should copy down and glue to the back 4. You’re five years ahead o f your flies. It seems as if there were none of your AM A License, so you can always time. where he lived. The fire flies and night find them. Nearly every one will fit 5. That may work in California, but flying started another contest: night nearly every occasion, but you will pro­ it won’t work here. hand-launched glider. Several modelers bably find one or two favorites. Per­ 6. I’m just different. had brought HLG’s, and soon the air mission is granted to use any or all. 7. I ’ve always done it this way. was filled with HLG’s sporting lights Another suggestion would be to have a 8. Let me think about it. on the wing tips (Fire flies Zapped, or card printed up with all of these sayings 9. I don’t have the energy. Hot Stuffed to wing tips). One lesson engraved thereon. By looking over the 10. I’m too old to change. learned: At night, the ground is just as card, you can choose the proper res­ So, that about wraps it up for another hard, and the trees are just as high.” ponse to use and simply read it o ff to month. Let’s get busy building and flying TEN EXCUSES FOR ANY OCCASION the offending questioner. Here ’tis: free flight. Excuses number 1, 2, 9 and For your own use in the future, when 1. I tried that once before, and it 10 are not acceptable for just sitting faced with insipid questions about your didn’t work. there . . . now, number 6, I’d accept. ·

MINIATURE Send application to: AIRCRAFT MACA COMBAT Wm. "Moose" Allen ASSOCIATION 418 Fairmont Dr.,

S5.00 Annual Fee DeKalb, Illinois 60115

Name A M A No.

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Phone

DECEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 81 standably, they can’t reserve space all EASY AS 1,2,3! day for exhibitors who don’t take ad­ vantage o f it. HUSON 3 6 's f in is h e d FIRST. SECOND and THIRD a t the Stop by our booth and say "H ello.” AMYA's 1975 easter n d iv i s io n a l championship for the 3 6 /6 0 0 CUSS AT RICHMOND. V IR G IN IA . FEATURED IN THE LETTERS AUGUST ISSUE OF POPUUR MECHANICS. OUR COMPLETE KIT INCLUDES FIBERGUSS HULL/DECK, FINISHED SAILS, ALL One very nice off-shoot o f publishing HARDWARE AND RIGGING, REQUIRING ONLY R/C, S A Il WINCH a model magazine is the receiving of AND LEAD SHOT BALUST. AVAILABLE NOW — Í 125°“ fob many pleasant (fortunately) letters from our readers. We hope that Ray Malm­ ström, o f England, doesn’t mind if we LEISURE PRODUCTS share his letter with you, because it tells 6 9 2 0 SHADDOCK ROAD an interesting story and illustrates what ANNAN DALI, VIRGINIA 22003 we have just said. “ What a great surprise! I have just Workbench .... Continued from page 4 tory in the 20’s, so you both have con­ received the Phineas Pinkham Scrapbook “ on stage" and had to deliver. Pardon tributed considerably to our historical . . . your prize for my being the oldest our dramatizing, but we’ve tried to con­ knowledge.” contestant in your recent Parcel Post vey something other than the facts and It seems that everything is falling into Proxy Peanut contest .. . and I just had figures that you’ll see plenty of else­ place . .. 50th Nats, Bicentennial year of to write these few lines in gratitude. where. 1976, Wright Field as the Nats site . . . I do not think you could have sent me It was an outstanding feat, and it has the makings of being the greatest any prize that I would have appreciated took a lot o f guts, determination, and ever. more! What a flow of nostalgic mem- planning to pull it o ff. Our heartiest TRADE SHOWS ARE A-COMIN’ mories Phineas brought back to me. congratulations to both of you! With winter coming (the temperature plummeted to 55 out here last night!), “ I must not take up your valuable CHALK ONE UP FOR MB lime, but must say that dear old FL YING In our July 1975 "Workbench” col­ it ’s getting near time to think of the annual trade shows. We checked around ACES was my great magazine thrill be­ umn we published information sent to fore World War II. I bought my copies and have come up with the following us by one o f the country’s elder states­ from a tiny news agent on a back street schedule for the maior modeling extra­ men of modeling, Bert Pond. This infor­ o f old Portsmouth . . . and how I pored vaganzas o f 1976. mation made it fairly clear that the 1975 over the full-size plans (Ah yes! Always The RAMS, in Seattle, Washington, Nats was not the 44th, as proclaimed FULL-SIZE plans in those great days!!) February 7 and 8. by AMA, but rather, the 49th! Aside laughed fit to bust at old P.P., and The WRAMS, in White Plains, New from the fact that some early national read every ad down to the very last York, February 28 and 29. modeling competition needed recogni­ full-stop. tion, there was the frustrating possibility The Weak Signals “ Toledo Show” . . . that the 50th Nats, certainly an impor­ the biggest biggie .. .Toledo, Ohio, April “ Had a great collection o f F.A’s, but tant milestone in modeling history, might 2, 3 and 4. during the war my home at Portsmouth go by the board without proper fanfare. The MACS, in Anaheim, California, was bombed, my parents evacuated, I A flurry o f correspondence among noted May 1 and 2. myself away in the R .A .F .. . . and I modelers and AMA, including Bob Meu- A few preliminary details on Toledo never saw those precious copies again. ser and Jim Noonan, the latter being indicate that all three days will be open And now, thanks to your kindness, the another o f the country’s elder statesmen to the public. Most dealers could not memories come back and Phineas raises of modeling and one who really knows take advantage o f their special times the laughs as o f old. its history. It all culminated in a letter because of their store schedules. “ A ll my thanks, all my good wishes from John Worth to Bert Pond, of which The biggest problem at the new Tole­ . . . and another huge Parcel Post Proxy we received a copy, stating that “ At the do site was parking. This year, when the Peanut contest in 1976! October 25 Executive Council meeting main lot is filled, a large free city lot, Very Sincerely, Ray Malmström” only half a mile away, will be opened, in Dallas, recognition o f the 1976 Nats Red Barrows, o f the R/C Old Timer as the 50th was approved. The effort and free shuttle-bus transportation will “ No Name Club” o f San Diego, sends you (Bert Pond) and Jim Noonan put be available. Tentatively, exhibitors will an apology for the last-minute switch forth to clear up the record on this is have parking space reserved for them o f dates on a recent R/C O.T. contest at much appreciated. We now have great up to II am each day, after that.. . Lake Elsinore, California . . . especially documentation concerning model his­ rottsa ruck. A good idea, and under­ to Don Kiebl, who came all the way from Reno, Nevada on the old date, to find no contest! Red also reminds us that the John CARR SAILS Pond commemorative R/C G/T contest takes place on December 14 (absolute­ 7607 GRESHAM ST. ly!) in Santa Maria, California (north of Santa Barbara). This is short notice, but SPRINGFIELD, VA. 22151 for more information, contact John Lesuer at (805) 922-5100. STANnART) CW A ll CARP SAILS F in e s t A tte r le a n -m a d e DACRCti s a i l c l o t h . V inyl, press-on numerals and Insignia. SEASONS GREETINGS! Heat sealed edges elim inate fraying. As the year comes to a close, we want Coated,stainless steel Jlbstay Installed. Rolled-edge grommets In tack,clew a h e a d . to take this opportunity to wish all of Bolt-rope mains'1 lu ff mast attachment. our readers the very best Christmas holi­ Santa Barbara - $30*00 10-Rater - $30.00 East Coast 12-Meter - $30.00 50/800(M-class) - $30.00 day, and a very successful 1976. 3 6 /6 0 0 .... $25.00 Internal. A-claaa- $35.00 And speaking o f ‘76 . . . a sincere west Coast 12-Meter - $30.00 Star L5 - $30.00 Vanguard "J"-Doat - - $60.00 T4A Petrel - - $30.00 Happy Birthday to the good old USA . . Scale vessels, special purpose boats, one-of-a-klnds: Write You’re still the best, so help me John for a quote, and for our 1975 Brochure and Used Sails list. Wayne!! ·

8 2 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER Choppers .... Continued from page 21 sleeve No. 431 lines up with both bear­ ings and is free and easy to move. Re­ seat the bearings as necessary to get this precision fit. The installation of the little spring (takes out control slop) was a bit tricky. I found the best way was to bend the “ U-elbow” upward to give the proper clearance. Do not rebend the curve, it ’s just right! Final balance of main rotor was right on, without addi­ tional weight! They must use excellent production techniques to turn out this kind of quality. The body shell was trimmed in ac­ cordance with instructions and literally dozens o f clothes pins were used to clamp the shells together. Line up the “ inside” of the body shells for the best possible fit. MEK or Plastic Weld is re­ commended for all joints. Work slowly in applying MEK to the inside seams where they can be easily reached. Ra­ ther than rigging up a long-handled brush to reach inside the tail boom, it ’s just good sense to tilt the body almost vertically and use a large brush (really loaded with MEK) at the top of the seam. The MEK will run down-hill, fol­ lowing the seam. Be sure to shake out any excess MEK in the tip of the tail before setting it aside to dry (at least two hours). The instructions tell you to either cut out the windows, or leave them in and paint them. I recommend cutting them out for the tremendous improve­ the next week-end my first peek inside stripe. You’d better believe it’s a fine ment in looks (and it would be a real the workshop disclosed the prettiest lit­ looker! shame not to use the beautiful green tle chopper in my stable, all painted Because o f the timing on getting this windows supplied with the shell). All and striped by son Kim, who took it article in by deadline, we were able to cut-outs were made with small scissors, upon himself to decorate "his” helicop­ fly only 3 or 4 test flights... with and then trimmed with a Moto-Tool sanding ter. Every time I complete a new one, without the body shell. The trim was drum, working to the “ inside” lines he takes over, makes a small modifica­ almost exact, but as usual, required a which are more distinct than those on tion, and claims it for his very own! slight adjustment of tail rotor trim. First the outside. Final window clean-up with Actually, he did an excellent job (being flights were made without the body, sandpaper will complete the task. Read an ardent modeler himself). Final color and because of the light weight, it literal­ the instructions carefully when fitting was metallic red and white, with gold ly leaped o ff the ground just as soon the w indows. . . The Du-Bro approach is to leave all windows intact and un­ separated from one another. .. simply cut away the excess plastic and cement them in as a unit. And it really works too! See the photos for details. Completing the body installation on­ to the basic frame was a snap, using the 4 stand-offs supplied with the body kit. All screw holes were reinforced with additional layers o f plastic and the em­ pennage was constructed very carefully with minimum cement (too much MEK will dissolve the thin sheets used in the tail group). Spars of balsawood were placed inside stabilizer and rudders with contact cement, for rigidity. UHU-Hart or Duco cement may be used to fillet around the tail group, if necessary, but use sparingly. Flaving now spent all of two evenings constructing this little gem, I had to leave my happy home and go back to work Sunday PM. I left the chopper on the bench and when I came back home

DECEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 83 I would, however, hesitate to recom­ CUSTOM R/C CAR COMPONENTS mend it as a beginner’s machine for two reasons . . . INC. First, the instructions and drawings supplied with the kit are inadequate, unless you’ve had previous experience in constructing helicopters (the photo­ graphs with this article should help con­ siderably in "visualizing” the missing drawings.) Second, the directional stability leaves a lot to be desired, since the tail rotor control is so very sensitive! Adjusting the tail rotor linkages to absolute min­ imum throw did help a bit, but I’m not too sure it's the final answer . . . perhaps the Kavan gyro will tame it enough for the beginner. . . or an added vertical fin might help. Anyway, this next weekend I’ll put HRE WINS 1975 R.O.A.R NATIONALS her through her paces, though I'm already EXPERT OVAL RACE! convinced she’ll prove to be a very active machine for the money. BCNU next HRE performance makes the difference. Look at the month. · record in the big races. Americanus ... Continued from page 10 epoxy them. Now cover the fin sides 1st. Expert Oval. 1975 R.O.A.R. Nationals with 1/32 sheet. 1st. Expert Road, 1975 R.O.A.R. sanctioned WING AND STABI LATORS: Both WINTER NATS. foam and built-up structures are shown. Recommend either be covered with HRE COMPETITION CHASSIS...... $144.95 1/32 balsa sheet, particularly if the Includes all hardware, except engine, radio, metal-foil covering is used. Note the use fuel tank, and body. Send for free catalog. o f sheet plastic root ribs and screw re­ tainer plates on the stabilator. I used .018 poly-carbonate sheet which is a HRE Inc., P.O. Box 4658, Irvine, California 92664 very tough plastic! ENGINE COWLING: The mounted as the throttle was advanced. Direc­ weight of the tail boom. Again, the res­ engine was wrapped in paper towels with tional control was a little too sensitive, ponse was terrific, and she flew with all no undercuts, plaster applied, and then so we moved the servo link a little closer the grace o f the larger helicopters. I shaped for a male mold o f the lower to the center o f the arm. This helped a think my first reactions to the plastic cowl. This was used to make a fiberglass lot, and even though the wind condi­ body were from pre-conceived ideas re­ cowl. The balsa jet nacelles were then tions were gusty, the little chopper ex­ sulting from other unsatisfactory exper­ fitted to this and faired with cloth and hibited excellent control. Remember too, iences, but I certainly am pleased with glass. Pull this o ff the engine and shape that without the body, there are no the Scorpion and Hughes shells on this the inside, reinforcing with fiberglass tail-feathers out on the boom to help kit, and expect a long life-span due to where necessary. (An alternate method stabilize it. the fine materials used and design tech­ of making the cowling is to build up After a couple of tanks o f fuel in this niques involved. and shape from balsa blocks). The tail­ mode of operation, we took our alloted FINAL APPROACH pipes are 1 /32 sheet tubes, attached with 5 minutes to install the Hughes 500 This Tri-Star just has to be a winner 2-56 screws to the nacelles. body and flew it again. It was necessary in anybody's game . . . she’s beautiful, Nose and tail were shaped from ure­ to add a couple o f ounces of lead weight inexpensive, right size, and flies very thane foam and lightly glassed. Hollow in the nose to counterbalance the added well for the experienced chopper pilot. out the tail cone for weight savings. Ambitious builders may build up a hol­ NATIONAL SOCIETY OF RADIO CONTROL AEROBATICS low nose section with detailed interior and clear plastic windows. Or, leave it NEW MEMBERSHIP AND RENEWAL FORM Please PRINT solid and use Monokote black windows. The cabin windows are also patches of black Monokote (sticky-back trim). Name AMA No. RADIO INSTALLATION: Mock-up your particular radio equipment to lo­ cate the C.G. near that shown on the plan. Better more forward than aft! (Put the battery in the nose if need be). In­ stallation of the 3 channel Cannon is Competition Classification: A B I I CZl c / d n D c / ο ε Π shown, giving elevator, throttle and ail­ NEW □ RENEWAL□ NSRCA No. eron, with coupled nose wheel from the aileron servo. If rudder is used, couple Dues are $4.00 for one year. nosewheel to it as usual. Send check or Money Order to: CONCLUSION: I preferred shock NSRCA, c/o Sally Brown, 8534 Huddleston Drive, Cincinnati, Ohio 45236 mounting the wing with rubber bands. Most all other components are attached

84 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER with screws. The finishing technique is at builder’s option, but I used rivet- Winner 1973, 1974,1975 Roar Nationals detailed metal foil covering. (Seeseparate article in this issue by the same author, H e r o b e e wen) 1/12 SCALE R/C This miniature Jetliner takes more time to build than the typical square RACE CAR “ ugly” something, but the results usual­ ASSEMBLED WITH MOTOR - LESS ly speak for themselves. With your own RADIO GEAR ideas, imagination and efforts, you can Features: be a part of the jet age with your own • Cox .049 Engine With Pull Starter “Clipper Americanus.” · • Independent Front Suspension • "Mag" Wheels F/F Scale .... Continued from page 41 • CycoladW3ody • High Strength Molded Frame will argue that R/C scale is the toughest • Centrifugal Clutch one. After all, look at the amount of • Ackerman Steering time and bucks that go into the good Speed - 20mph; Scale Speed - 240 mph; AMA scale R/C model. I agree, but with Turning Radius - 4 feet; Track - 4 V. in.; good, sound, reliable radios that are Gear Ratio - 7:0:1; Weight, Less Radio - commonplace today, and a proficient 21 oz.; Radio Area - 2 " X 6%" pilot at the transmitter, the chances for PRACTICALLY MAINTENANCE-FREE flight and survival are excellent. WILL ACCEPT MOST RADIOS IN MINUTES - 3 OTHER MODELS TO There is nothing more that can weak­ Shown: No. 201 COMANDO - $38.95 en the heart and send one’s pulse rate CHOOSE FROM. sky high, than to start your model’s engine in preparation for the first flight. M a M n e . Products Inc. 12702 Northeast 124th StrMt. Kirkland. Washington 98033 - (206) 827 8606 In many cases, years of work is on the line on that first launch. A need for tall grass is evident. . . but once the I CLOUDBUSTER RACE WINGS | model has been trimmed to fly the way FREE FLIGHT you want it to . . . there is nothing more gratifying. HARDWARE TOOL9, ACCESSORIES A PRECISION CASTINGS The question in my mind is, why does there appear to be a lack o f interest WINDING BAL5A in gas scale? Even on the Nationals level, HOOKS STRIPPERS there are seldom more than 30 gas pow- UNLIMITED TO PEANUT IS" AND 3 · ” LENGTHS wered scale models, and that’s including ISO M O U N T Juniors through Open members. That cJETEX· M O T - W IR E EIRELETØW RUBBER SCALE PLANS FOR SIX (6) doesn’t come close to averaging one mod­ PLATE FLIGHT-PROVEN. RARE & UNUSUAL EØUPE HUB D T KIT HOOKS el per state. Now that rubber scale has RACING PLANES: CROSBY, FLOYD RADIAL„ M r 4 FITS: FORSTER 29. HAS ENGINE MOUNTt j TS0T TORPEDO, OAR 19 AND 23 experienced a renaissance, what can be BEAN, TWO FOLKERTS, SMIRNOFF Q 3 3 FO R O done to get the same kind of action for BEARCAT, and CHAMBERMAID. C A T A L O G S 1 .0 0 F/F gas scale? Why can’t there be some Complete set, postpaid, only $4.00 cJIM ERØEKET REPLIEAS kind of international competition for order from: 1442 N. FRUIT AVE. CLOUDBUSTER VENTURE both rubber and gas scale? FRESNO. EA. 93728 With only 6 AMA scale entries this P.O. Box 2921, Livonia, Mich. 48154 year at the Nats, three of these six en­ trants will be representing the United the takeoff run and gets the model on down to a very reasonable $25.00. The States in international competition. step quicker. three large plan sheets are beautifully Wouldn’t it be nice to have a F/F scale It is not always easy to observe every­ printed in blue-line, and together with team chosen from fifty or sixty compe­ thing that occurs during a takeoff at­ the step-by-step instruction booklet, titors and going along as well? Maybe tempt. If the propeller throws a lot of makes assembly of the kit very clear this is what it will take to put gas scale spray, either add spray dams, lengthen and straight forward. This semi-kit puts into the swing of things, and I for one, the spray dams that you have, or shorten the latest design trends, incorporated will see what can be done. Flow about the propeller a little. Water thrown back into a quality kit, well within the reach you? · on the model is another source of drag o f the average modeler. The Satellite and excess weight during the takeoff. 788 GLFI is available direct from Satel­ Found...... Continued from page 33 I f the model dunks itself several times, lite City. Californians remember to in­ attempts are successful. I believe that give it a chance to dry out. The extra clude an extra 6% “mad money” ... the rubber I was using is not quite as weight o f a water-logged model is un­ Oh ... be sure to stick it together with powerful as Pirelli, or the newer black fair to the poor little thing. Satellite City’s "Hot Stuff!” * * * Sig contest rubber. Go out and have fun with your Dead calm glassy conditions are fine Found. I t ’s the best excuse a person Swank Products, 729 West 16th St., for test flying, but they are a little har­ ever had to go wading along a muddy Costa Mesa, CA. 92627, is producing an der to R.O.W., because the surface ten­ shore. · electric powered R/C gunboat, 45 inches sion is harder to break. Flave a friend LOA. The boat comes completely fin ­ throw a pebble in the water just before C ounter...... Continued from page 7 ished with or without radio, and being you attempt the R.O.W. fornia 91331, comes with 96 precut designed primarily for action, it is semi­ The best conditions for R.O.W. fly ­ parts which are machine cut and hand scale as delivered. And the action isn’t ing include a very light breeze to lightly finished from the finest balsa. The kit just “ Go, stop, back up, and steer.” ripple the water, and a drift that will comes complete with all hardware, but The bow-mounted gun fires a pump- bring the model back to you if it lands the necessary sheet and strip stock is not operated stream of water better than in the water. The breeze also shortens supplied. This holds the price o f the kit 20 feet, and in a sea battle with another

DECEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 85 tuator output drives the boat forward through the water. Plankton sells the radio units, as well as offering plans CRAFT SAW TABLE packages for the small scale boat hulls. Write to Walt Whippo, Plankton Boats, Low cost easy-to-assemble jigsaw table 110-M Sunset Drive, Cocoa Beach, Fla. 32931. for light projects. For plywood, styrofoam, * * * cardboard, plastics, foam-core, etc. Will Polk’s Hobbies, 346 Bergen Ave., accept Black & Decker, Rockwell, WEN and Jersey City, New Jersey 07304, has in­ troduced a new item that is one of other low-cost jigsaws. those things that you’ll want to have M odeling A $75 craft saw for less than $25! immediately, even though you probably don’t need it right now, but some day Light Crafts $12.95 p.p. check or money order. . . . Hide-A-Wire is a lamination o f hair- thin insulated wire to I/2 inch clear ΛΛΚΛΛ DESIGN BOX 106 WASH INGTON CROSSING, PA. pressure sensitive tape. Intended for low voltage applications, it can be used as 18977 antenna wire, or speaker wire for AM, FM, and TV applications. Hide-A-Wire is nearly invisible on application, and ARE PEANUTS YOUR BAG?? can be painted or wallpapered (Mono- WALT MOONEY OFFERS TWO OF ’EM NOW! koted?) over to make it completely in­ visible. The most obvious use for mod­ elers would be as a receiver antenna for PLANS BAG* I " PLANS BAG *2 ; R/C applications. Scale modelers may 14 PEANUTS PLUS 2 OTHERS 14 PEANUTS PLUS STAHLWERK want to use it to route current to wing ORD-HUME OH7 · FOKKER V-23 VP-2 · S.E.5 · MICROPLANO VELOZ tip lights, landing lights, etc. There are MEYERS O.T.W. · LA IR D L C -D E FORD FLIVVER · SPEED SPITFIRE probably a hundred other applications P H ALZ PHOKKER · SLINGSBY DART MILES M-5 SPARROWHAWK · DH-6 for modelers... your imagination is the PIPER VAGABOND · GEE BEE D WACO SRE · RENARD R-17 only lim it. Hide-A-Wire retails for $2.49 PILATUS PORTER· ANDREASON BA-4B BUCKER JUNGMANN · CULVER DART for a 24 foot roll, available from dealers OH-6 · DRUINE TURBULENT WHITMAN'S VW POWERED RACER HUNINGTON H-12 · MISTER MULLIGAN STAHLWERK MK R IIIB · MONOCOUPE IIO or direct from Polk’s. PIPER PAWNEE AND PIPER COLT. FOSTER WICKNER WICO GM-I · > * * * A hundred and forty-four pages of ONLY »5,00 EACH (POSTPAID) FROM: WALT MOONEY model aircraft know-how that is as cur­ 2912 CABRILLO MESA, SAN DIEGO, CA.* 92123 U.S.A. rent as any available. That is the best way to describe the Aero Modeller Annual for 1975-76. Compiled and pub­ lished by Model and Allied Publications VINTAGE R-C FLANS (the publisher of Aero Modeller Maga­ zine), the Annual is a survey o f achieve­ ments in the model aviation field. It is packed with the best of topical features * CONSOLIDATED PBY-5A "CATALINA” and designs from all over the world. 9 FT. WING SPAN The 1975-76 Annual is the 28th in the ALL RIBS a FULL FORMERS SHOWN ON PLANS / / series. Special features include a large PLASTIC ENG.COWLS 8 9.00 PR. ( „ T.M00U 0MLV) CLEAR OUN BLISTERS $6.00P R > section on Old Timer models (featuring THE NEW PORTABLE MB’s own John Pond on the cover, no 4 LARGE PLAN SHEETS — Plans $13.50 MINI - ANTIC, compact car 6 f t. WING SPAN MODEL PBY-5A less!), a section on finishing models with SIZE. .19 T0.29ENGINES, enjoy that relaxed the latest materials, a pictorial tour of the o r d e r one n o w / / Plans $ 10.00 ANTIC flying. $ 54» & postage ______ADO 8 LOO POSTAGE O.S. engine factory in Japan, and a sur­ FOR DESCRIPTIVE BROCHURE SEND CATALOG-OVER 50 PLANJS_50$ DEALERS WRITE vey on control line combat design and .50° TO"1.01 * PROCTORS PO BOX 964!. SAN WORLD WIDE tactics. Also covered are Pennyplanes DIEGO. CALIF, 92109 - Mlgd. at 6821 Convoy Ct San Diego,Calif. 4 SID MORGAN for indoor sport flying, a low-down 13157 ORMOND,BELLEVILLE , MICH.48III U.S.A coverage on gyroscopic effect, and 36 reduced plan outline drawings of the Swank gunboat, a direct hit releases a most progressive designs of all types of taking liquid refreshment to your guests ping pong ball several feel into the air, models (Jon Davis’ “ Groovy Tuna,” fea­ on the other side of the pool! depth charge fashion. The obvious chal­ tured in March ’75 MB, is incorrectly * * * lenge o f a two-boat gun battle will cer­ credited to M.A.N.). The Aero Modeller tainly make the 3-hour battery capacity Radio controlled boating indoors? Annual is available from better dealers, seem like 3 minutes. And if you can’t This may sound impossible, but it is a or direct from Model & Allied publica­ hit your opponent’s boat, you can always reality, thanks to the Plankton Boat Co. tions, P.O. Box 35, Bridge St., Hemcl, douse him with a stream of water! Aimed Plankton has pioneered a totally new Hempstead, Herts, HP 1 1EE, England. at the enthusiast with the fatter wallet, concept in R/C boating. The small, scale * * * ready-to-run boats will retail for $495 boats are not only steered by R/C . . . GloBee racing glow plugs, from the direct, complete with Futaba 2-channel they are also propelled by the radio con­ Fusite Division of Emerson Electric Co., radio system. The Swank-built pump is trol unit. By utilizing the Ace pulse are unique design plugs that feature glass simple and rugged, using a diaphragm and proportional radio system, the small seals. The glass seal protects and supports a ball valve system that produces a sound craft are “ sculled” through the water at the coil-wound element from the base like the rapid-fire gun that it operates. a realistic speed. By attaching a flexible to the tip. Since the element is nearly For the cocktail set, the target funnels plastic “ tail” to the conventional water flush with the bottom surface o f the can be replaced with a 2-glass tray for rudder, the flip-flop action o f the ac­ plug, faster ignition and increased RPM

8 6 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER INDEX TO ADVERTISERS CLASSIFIED ADS Ace R/C Inc...... 6th Cover Noncommercial: Rate is 25 cents per word with a minimum of $3.00 worth. Airtronics ...... 3rd Cover Commercial: Rate is 40 cents per word with a minimum of $5.00 worth. No American Balsa Corp...... 66 mail order discount house ads knowingly accepted. Astro Flight Inc...... 60 All ads are payable in advance and may be for any consecutive insertion period Applied Design Corp...... 70 specified. Name and address free. Send ad and payment to: The MODEL BUILDER. Bill's Miniature Engines...... 58 Classified Ads, 1105 Spurgeon, Box 4336, Santa Ana, California 92702 Cannon Electronics...... 58 Carr Sails...... 82 PROFILES by Plecan. Two big 24" x 36" "GOLDEN AGE" AIR RACER BUFFS. En­ Century 2 1 ...... 65 charts of famous Free Flight designs of the joy details of the rare air racers never before Cloudbuster V e n tu re ...... 85 1934/1963 era. 77 authentic profiles, plus published. Accurate, historic technical draw­ Coverite...... 76 data (span, length, engine size, etc.) . . now ings, which also show full scale model con­ Jim Crocket Replicas...... 85 only $3.00 for FOLDED charts. Calif, resi­ struction in the classic style. SASE and 254 Custom Craft Products...... 76 dents add 6% tax. Paul Plecan, Box 1556, for list. HALL ENTERPRISES, P.O. Box Dept. MB, Garden Grove, Calif. 92642. 485, Winter Park, FL 32789. Dumas Products Inc...... 4th Cover SPECIAL CLUB OFFER . . On 3 or more DTC Design...... 74 set sent to one address, 25% discount. SANDPAPER — Finest quality sandpaper. Du-Bro Products Inc...... 71 Aluminum oxide & silicon carbide with Flyline M odels...... 60 extra heavy paper back. Fifty sheets assorted SPRUCE PLYWOOD: Equal strength but Flying Scale M odels...... 72 30% lighter. The best possible construction grits from 80 to 320. $5.50 Postpaid. D & J plywood. 1/8" - 1/4" sample sheets and Enterprises, Inc., P.O. Box 246, Wilmington, Glider G uiders...... 75 data sheet $1.50 postpaid. Price list upon Deleware 19899. Carl Goldberg Models...... 1 request. 1/20" veneer now available. David Golden Age Reproductions ...... 75 TISSUE PAPER, 10 cents per sheet, 19 C. Fleming, 2392 Northtree Court N.E., HRE Inc...... 84 colors, send SASE for sample. Bill Wilson. Salem, Oregon 97303. Jo-Mac Products...... 85 P.O. Drawer U, Kountze, Texas 77625. K&B Mfg...... 56 COLLECTOR wants old solid, and scale rubber kits; old model airplane catalogs. Walt Speed Equipment: Cars, R/C, planes, boats. Kraft Systems...... 2nd Cover Grigg, 1303 Stetson, Orlando, Fla. 32804. Hop-up, chrome, ultrasonic cleaners. SASE Leisure Electronics...... 78 plus 504. Franny's Chrome, 513 Vesta Place, Leisure Products...... 82 R/C RACE CARS AND ACCESSORIES Reading, Pennsylvania 19605. Micro Models...... 81 CATALOG. 1/8 scale U.S. Nationals Cham­ Model Builder Binders...... 78 pion. Delta Manufacturing, Box 27, Lorimor, OLD TIMER MODELS: Beautifully built Model Builder/Pana-Vise C ontest...... 2 Iowa 50149, (515) 763-2220. and covered with transparent Monokote. Each model is custom built by Dale Myers. Model Builder Products...... 5th Cover WANTED — Will buy multi-cylinder model Will sell or trade for ignition engines. Box Model Racing Products...... 68 airplane engines. In particular, the older 66, Stewartstown, PA. 17363. MKM Designs...... 86 spark ignition and certain glow ignition. All Model Rectifier Corp. (M R C ).. . . 8th Cover letters answered. Russel Sprague, 8800 SAILPLANE DESIGNER'S HANDBOOK: Walt Mooney Peanuts...... 86 Green Lane, Randallstown, Md. 21133. Design instructions. 180 airfoils, 63 designs, 3rd printing, $4.96. Eric Lister, 953 Klock- Sid Morgan (Vintage Plans)...... 86 R/C SAILPLANE PLANS: "Osprey 100." ner Rd., Trenton, N.J. 08619. M8

DECEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 87 STICK 'EM PATTERNS FULL-SIZE PLANS No. 10752 MISTER MULLIGAN S4.50 Complete sets of pressure sensitive patterns SERVICE Jumbo scale rubber model of famous Ben provide "printed wood". . . on your stock . . Howard racer, spans 56” . Tom Houle. (with instructions) for selected MODEL BUILDER plans. Press all patterns for ribs, bulkheads, tips, etc., on No. 10753 SUPER PUP S2.50 proper thickness sheet balsa or plywood, Profile C/L stunt ship for .29 to .36 pow­ and cut 'em out! No tracing, no transferring, No. 12751 CLIPPER AMERICANUS S4.00 er, 42" span. Easy-built. Mike Parenteau. no plans tearing, no inaccuracies. Just like Composite scale R/C model of modern jet making up your own kit with printed wood. airliner. Span 48", .09 eng. By A rt Hall. No. 1075 O.T. SKYLARK $3.50 Pleasing Class A/B Louis Garami design. "Stick 'em Pattern" numbers correspond to No. 12752 FOUND S I.50 Shoulder wing, 50" span. Phil Bernhardt. plan numbers. Order with plans and they'll Scale rubber powered seaplane of Canad­ be mailed together . . 3rd Class. Add 504 ian design. Span 26". By Walt Mooney. No. 9751 BABY ALBATROSS S8.00 per set to mail patterns 1st Class. Exact R/C scale model of famous Bowlus CALIFORNIA RESIDENTS ADD 6% TAX. sailplane. Span 122". Col. Bob Thacker. No. 12753 SOLIDIFLIER $2.00 No. 775-O.T.SP BOMBSHELL $3.25 All-balsa A/1 Nordic with ribless Jedelsky No. 575-O.T.SP MERCURY $3.25 wing. Span 47". By George Perryman. No. 9752 FIREDRAKE $3.00 Half-A free flight featuring fast climb, No. 11743 SP "C-QUELL" S3.95 No. 1275-0.T. THE PIONEER $4.00 flat glide, penetration. Larry Sicuranza. No. 1174 O.T. SP LANZO STICK $1.95 No. 91074-O.T.SP BUHL PUP $4.95 Earliest gas job by Ben Shereshaw. Para­ No. 975-O.T. PURSUITEER $4.00 sol, 80” plug-in wing. By Phil Bernhardt. No. 8741SP WOODY PUSHER $1.95 Smart looking 1938 Pete Bowers design. No. 874 O.T.SP POWERHOUSE $3.95 Span 60” , area 575. By Phil Bernhardt. No. 7741SP CURTISS A/12 SHRIKE $3.95 No. 11751 NAVY FLYING BOAT S6.00 No. 774-O.T.SP OUT Ό SIGHT $2.45 No. 8751 SOPWITH TABLOID $4.00 No. 6741SP TRIXTER BEAM $2.95 "Composite" scale R/C flying boat bi­ Sport Scale WW I biplane for 3-channel plane. 6 ft. span, 40-61. George Clapp. No. 674-O.T.SP RED ZEPHYR $3.95 radio. Span 42", .19 eng. By Chris Moes. No. 12711SP CURTISS-WRIGHT Jr, $3.95 No. 11752 "TW IRP" S0.75 No. 8752 VOLKSPLANE $1.50 No. 574 O.T.SP T D COUPE $2.95 Beginner's fuselage rubber powered ship. Great performing rubber powered profile No. 11731SP BIG JOHN the FIRST $5.95 Teaches stick 'n' tissue. By Dave Gibson. scale. Span 24". By John Oldenkamp. Price includes 3rd Class postage and reprint No. 11753 "LU N AR -TIC " S3.00 NO. 8753 FRITZ, HLG $1.00 of building instructions (if any). Add 454 Classic-looking, high performance Half-A A pylon style, high performance HLG, PER PLAN for 1st Class postage. Add 504 free flight. Easy to build. Harry Murphy. with DT system. Different! Jim Parker. for overseas orders (except APO's). Send self-addressed, stamped business size No. 875-0.T. '38 MOFFETT CHAMP $3.00 No. 1175 O.T. FOO 2-U-2 S2.50 envelope for free copy of complete plans list. A pre-Zipper design by Dick Obarski, re­ Canadian Roy Nelder's beautiful rubber CALIFORNIA RESIDENTS ADD 6% TAX. duced to .020 Replica, by Ron Sharpton. ship. A real classic. By Phil Bernhardt. SEND TO: No. 10751 THE LITTLE ONE S4.00 No. 7751 LITTLE BOMB $2.50 MODEL BUILDER PLANS SERVICE Minimum area 1/2A pylon racer for two Economy size, .40 powered pattern ship 1105 SPURGEON, BOX 4336, channel radio. By Wm. R. Nielsen, Jr. has rolled ply fuselage. By Dick Sarpolus. SANTA ANA, CALIFORNIA 92702

Celebrity are available from Cathedral ners, but it would be ideal for an ex­ Combat fliers should welcome the Model Manufacturing, 200 Hunter Street, perienced power flier who wants to try addition o f two new designs to the McComb, Mississippi 39648. soaring. The Rubber Ducky is available Midwest Products Co. line o f control * * * from hobby dealers, or direct from Per­ line kits. The L il’ Snip is a 24-1/2 inch The Introducktion (that’s right!) to formance Flight Systems for $44.95. span plane designed for the growing the instruction booklet that accompanies * * * 1/2A combat event. It was designed by the Rubber Ducky, from Performance Bob von Hellens, 1974 Western Soar­ leading combat flyer, Rich “ Von” Lopez Flight Systems, 2840 Seattle Drive, Los ing Champs winner, has formed a new (and originally published in MB, Feb­ Angeles, California 90046, states that company, Glider Guiders, to manufac­ ruary 1974). The kit, which includes die “ the Ducky will thermal with all but ture the “ Fly Hook.” Fly Hook is an cut balsa and plywood parts, and all the lightest floaters, yet when the ther­ indestructible, adjustable tow hook de­ hardware including a fuel tank, can be mal dies it can get to the next one signed for competition and sport flying built in two versions. One version uses minutes ahead of the competition.” This o f R/C sailplanes. It is made of rigid, an enclosed fuel tank (which is included) combination slope/thermal design uses high carbon steel rod stock, and is welded with a Tee-Dee .049. An alternate ver­ a semi-symmetrical airfoil with a light to add extra strength. The hook is fin ­ sion uses a ply firewall and either a wing loading to give it this unique ver­ ished in matte black, and comes com­ Black Widow or Golden Bee radial satility. The Ducky uses a four-piece plete with mounting hardware. The best mounted reed valve engine. The Lil ’ ASA plastic fuselage which is assembled feature o f this hook, unlike others on Snip uses a diamond airfoil for maximum by the builder with conventional model the market, is that it cannot be bent ease of construction. The tail booms are cement (Testors or equivalent), and a with your bare hands. It is strong enough die cut from plywood to survive the foam wing which is partially sheeted and to be used as a landing skid, and can be inevitable crashes. Retail price is $6.50 capstripped with 1/16 balsa (sheeting landed on concrete repeatedly without The larger Firefly, designed by Ed material is included in the kit). For slope damage or appreciable wear. Need we Bridant, uses a more conventional sheet­ aerobatics, the stock 75 inch wing can be say more? The Fly Hook is available ed D-tube type wing. The 35-1/2 inch cut to 60 inch span. direct from Glider Guiders, P.O. Box ship is designed for .15 or .19 size en­ The Ducky can be flown with any 1400, Valley Bank Center, Phoenix, gines. The Firefly also includes all hard­ combination of controls to suit the Arizona 85073. The Fly Hook was de­ ware and fuel tank components. The builder. Options include rudder, elevator, signed by competition sailplane fliers Firefly will sell for $10.95. Both kits ailerons, flaps, conventional or Vee-tail, who know the strains that hooks are are available from your hobby dealer or or various combinations of coupling of subjected to. The manufacturer is so direct from Midwest Products Co., 400 these. Full size templates are included confident, that he offers an uncondi­ South Indiana St., Hobart, Indiana to cut the tail pieces to shape. The fast tional guarantee. If the Fly Hook is ir­ 46342. Early in 1976, a .35 powered assembly kit comes complete with every­ reparably damaged or broken, Glider combat design will be available from Mid­ thing needed except covering material, Guiders will replace it at no charge west. The Matador will be similar in paint, and glue. Due to the speed of (other than 30 cents for handling and design, and the kit w ill be equally com­ flight, and sensitivity o f controls, the postage). Ducky is not recommended for begin­ * * * plete as the L il’ Snip and the Firefly. ·

88 MODEL BUILDER IN THE BEST CIRCLES, IT’S ii li

A PRECISION INSTRUMENT FOR THE DISCRIMINATING MODELER

Safe, Rear Draw-Bar Clutch Available in seven anodized handle colors: • silver, blue, red, green, gold, copper, violet. • Precision, Instrument-Quality Materials Complete set in fitted hardwood case; includes • Strong-Holding Advanced Collet Design uber Skiver, together with two vials containing • Non-Rolling Hex Cross-Section six No. 11, six No. 15, one No. 12, and one Deeply Knurled, Non-Slip Grip No. 20 . . . A total of 14 blades $12.95 • Individual handles Ispecify color) S5.10 • Long-Life, Stainless, Vial of 6 blades (No. 10, 11, 12. 15. Surgical Steel Blades or 20) $2.10 20

See your dealer, or order direct. 0 Dealer inquiries are invited. PRODUCTS All direct orders sent postpaid in U.S. MODEL BUILDER California residents add 6% sales tax. 1105 Spurgeon, Box 4336, Santa Ana, California 92702 DESIGNED BY OWEN KAMPEN

A .23 POWERED PATTERN SHIP FOR SPORT AND COMPETITION P d C G R

13K109 Super Pacer $32.95

FIRST CAME THE PACER--it started a whole new revolutionary category of model planes, the 1/2A pattern ship. Then people wanted a larger, fully competitive version with the same features--good looks, easy construction, sensible design, light weight, fuel economy, and solid performance at an affordable price. Here it is, the Super Pacer. For the economically minded pattern ship flier. All balsa and ply construction. Quick to build, light and sturdy to last long. It has to be a sin to get so much enjoyment out of the performance obtained at so little expense.

SPAN: 46 in. WEIGHT: approx. 3 lbs. all up AREA: 40S sq. in. FUNCTIONS: 3 or 4 Channels LENGTH: 40 in. ENGINE: .23 to .25

Try your dealer first. You can order direct if he doesn't have it.

] Send me a Super Pacer. Enclosed is $32.95 plus $1.00 handling. ] Send me your complete catalog. Enclosed is $1.00 (add $.50 for 1st Class mail return.)

MB E l R/C .lIn c .) IMBOX 511, HIGGINSVILLE, MO. 64037 PICK A MODERN WINNER TRY A COMPETITION PROVEN C-L STUNTER Designed by MIKE GRETZ SIG MUSTANG STUNTER KIT CL-21 SPEEDY CONSTRUCTION! WITH MOLDED PARTS AND FOAM WING CORE KIT FEATURES: Precision Cut Foam Wing I Formed Plastic Fuselage Top Molded Plastic Fuselage Scoop Molded Plastic Cowling Clear Bubble Canopy with Framing Handy Printed Fuselage Sides Build Directly On The Wood ENGINES: .29 - .40 Heavy Duty Nylon Bellcrank WING SPAN: 50 in. Colorful Decals WING AREA: 480 sq. in Formed Torsion-Bar Landing Gear WEIGHT: 41 oz. Cut Balsa and Plywood Illustrated Instructions HARDWARE PACK INCLUDES *20.95 Molded Hinges Molded Nylon Control Horns Silver Soldered. Plated Flap Horn SUPER CHIPMUNK

Designed by MIKE STOTT ENGINES: .29 - .40 WING SPAN: 52-1/2 in.

KIT FEATURES: New Look Molded Plastic Cowling Sleek Bubble Canopy With Molded Framing Smooth Formed Plastic Wheel Pants Handy Printed Sides - Build Directly On The Wood Heavy Duty Bellcrank Colorful Decal Sheet Formed Torsion Bar Landing Gear Hardware Pack Including Molded Hinges Die Cut SIG Balsa And Plywood Detailed Full-Size Plans AKROBAT Designed by MIKE STOTT

KIT CL-16

Formed Plastic Engine Cowling Molded Plastic Canopy Formed Torsion Bar Landing Gear Lead-out Wire Heavy-Duty Bellcrank Plated Flap Horn Hardware Pack Decals for Scale Markings ENGINES: .29 - .40 Full Size Plans WING SPAN: 51 in. Isometric Views and Instructions WING AREA: 550 sq. in. Die-Cut SIG Balsa and Plywood s20.95 Nylon Elevator Horn

See your dealer first. To order direct add $1.00 postage in the U.S., $1.50 in Canada. No C.O.D. orders. SIG MANUFACTURING CO., INC. . . Montezuma, Iowa 50171 For most R/C manufacturers this is their total« R/C commitment. at MRC we're . committed

At MRC we new R/C modeling as a totally integrated sport We feel it takes a vanet> of performance-proven products to get the most out of your hobby While REMOCALl most major R/C mufacturers produce only radios, or radios and engines, at Put an end to lost MRC «ο re committed to being 100% involved in your product needs equipment Tins involvement has allowed us to pioneer in areas of R/C that have given rise • Locates fly-aways no! only to better quality radio systems, but to national and international • Audible signal championship MRC Webra, MRC*Enya and MRC-YS engines; a new breed of lasts for hours • Minimum current helicopter a sophisticated, finely engineered R/C tank, and ready-to fly aircraft drain that come truly ready-to-fly. • 100% transistorizedid This kind of R/C us to respond faster with service, mVofvement has taught • Warns when some­ quicker with information, more readily with a Mow ol unique and excibng one else is on your products in anticipation of what you may want frequency Of course, we know we’re not the only ones making top quality radios and powerful mode) en$nes. . . but we’re among the only f g THIS MONTH ASK YOUR HOBBY DEALER TO SHOW ones so completely committed to producing this kind of product l q YOU MRC'S REMOCALL variety a broar; spectrum of field-proven, reliable products that help you get the most of your hobby MODEL RECTIFIER CORPORATION/2500 WOODBRIDGE AVENUE/EDISON, NEW JERSEY 08817