Starts on page 52 Sticks are virtually free of play at neutral. No zig­ zag. Smooth motion Precision machined all throughout. metal open gimbal sticks honed to critical tolerances, outlast and outperform plastic open Sealed conductive pots gimbals. supported by bearings minimize friction and play.

Ratchet electronic trim control with 22 detents for precise adjustment.

Miniaturized receiver only 2 V2 " x V/λ " X %" is metal encased tor Compact, lightweight added protection, better shielding. flight pack ideal for Va midgets. System includes reverse servo for easier installation. C-Mos receiver circuitry for low current drain, increased dependability. Select from 8 different servos including ball bearing coreless motor Charging jack on the switch harness and mini type. mounts neatly into the side or bottom of your model.

And there’s one more thing you should know. The difference in price between an ordinary 5 channel and MRC’s 775 professional system is less than what you’d probably spend for a couple of gallons of fuel. That’s a small price to pay for the best. See the difference at your hobby dealer, today. Send $1.00 for full color, 44-page, MRC Model Aircraft Product Catalog © MODEL RECTIFIER CORPORATION · 2500 WOODBRIDGE AVENUE · EDISON, N.J. 08817 THE ULTIMATE IN RC FLYING FOX 20CC OPPOSED TWIN

The Fox Twin is the finest two cylinder model airplane motor ever twins, where a single carburetor would result In one cylinder running produced. Every design consideration and manufacturing care has rich and the other lean. Although the Fox Twin can turn a 17,18 or 19 been taken to make the Fox Twin a really practical power plant inch propeller faster than most chain saw engines of equal displace­ The two cylinder opposed simultaneous firing configuration was ment, its true potential is achieved by letting it rev up. The result Is the selected because equal and opposite piston motions cancel each ability to fly your airplane in a realistic manner, using a scale type pro­ other out vibration wise and produces a smoother running configura­ peller, but if you are performance minded, then put on a smaller pro­ tion than the alternate firing in line motor. In addition, the opposed peller and really move out. We recommend a 15-6 for average models. cylinder configuration cools better and fits most scale models better. Each Fox Twin is factory run at full power, assuring you that when The cylinder configuration is of the most modern and advanced you buy this and put it in your model, you can fly. The carburetor has schneurle porting, featuring Fox exclusive angle side flow bypasses. been adjusted and synchronized for atmospheric conditions at the The cylinder is glass hard and the pistons are factory. Unless you are at a rather high al­ made of the hardest piston alloy available. titude, no further adjustments should be The crankshaft is of hardened steel, and ex­ necessary tremely massive compared to any other motor you have seen. The massive Fox T w in ...... S250.00 SPECIFICATIONS: crankshaft construction was necessary be­ Bore ...... 907 cause the terrific power of earlier experimen­ S tr o k e ...... 937 tal cranks twisted in two for conventionally H.P. (at 14,000 RPM) 3 plus proportioned shafts. The dual carburetion Weight | ? b s . , 8 oz. FOXMANUFACTURING CO. makes possible adjusting each cylinder for 5305 TOWSON AVE FORT SMITH. ARK 72901 Standard accessories: Firewall type motor maximum power, a failing of most earlier PHONE 501-646-1656 mount, carburetor interlink, and fuel line "Y" fitting.

For More Information - Call: 1-501-646-1656. LIST PRICE *24.95

Patterned after Top Flite's original NOBLER, the Other features of this latest in stunt design are full winningest U-Control in history. Top Flite's all new size plans, precision die cutting, hardware, formed TUTOR is the perfect beginning stunt flyer or the wire landing and tail gear, tank mountings, nylon ideal practice ship for full stunt competition. TUTOR bellcrank, and adjustable lead-out guide. TUTOR continues Top Flite’s long tradition of outstanding kit . . . one more reason Top Elite continues to be the design with many important features. choice of champions. Highlights of the new TUTOR kit include: a spe- c al construction feature assuring an easily built, accurate, and warp-free wing: a D-tube leading •elge aioviding a lightweight wing 20% to 25% stronger than conventional design; all balsa struc­ ture with maple motor mounts plus preshaped flaps and , and a precision machined one-piece plywooc: reinforced with accurate cutouts tor wing, motor mounts, and stabilizer.

Top Flite Models, Inc. 1901 N. Narragansett Avenue Chicago, Illinois 60639 f C m , p o in t s

^•rect drive servo mechanics

Crimped c o n n e c t

Our servos are molded of long wearing rugged nylon rather than the cheaper short life materials used in competitive servos. For accuracy, our servos have their reference potentiometers ac­ tuated directly from the output drive rather than indirectly Built-In charge receptacle through a gear which, because of gear teeth backlash, adds to centering error.

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

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

These are but a few of the fine points which when added together make our radio control equipment the world's finest. Write for our free catalog and get the complete story. in receiver antenna is standard , tt,e antenna receivers. This means that you may 11 available in stan- 450 W. California Ave. ently in your model. Extra antenn,as antennas P.O. Box 1268 d special RF loaded short lengths. Th ^ boats. Vista, California 92083 (714) 724-7146 ecially convenient for small aircraft, LIGHT WEIGHT

POWER SPEED

BANTAM ^ II« ^ MIDGET W B ^*1WB BY ISIOVAK electronics

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

NOVAK ELECTRONICS IS INTRODUCING SPECIFICATIONS FOR BANTAM MIDGET A NEW CONCEPT IN AIRBORNES. TORQUE: ...... 21 oz. in. Choose one of our colors to mix or match TRAN SIT TIM E: . . 0.3 seconds/100 degrees with your existing equipment. Tell us your SIZE (inches):...... 1. 125H x 0.6W x 1.43L radio manufacturer, and we will supply servos, WEIGHT: ...... 24 grams, or .846 ounces battery packs, and switch harnesses with the OUTPUTS: Rotary wheel, arm, adjustable proper plugs and specifications to match your arm. Compatible with A L L 3-wire digital radio system. systems, except Pro Line.

BANTAM MIDGET, Assembled ...... $29.95

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

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

WHEN ORDERING. PLEASE SPECIFY YOUR BRAND OF R/C SYSTEM AND COLOR PREFERRED (WHITE, BLACK, RED, BLUE, YELLOW, ORANGE, IVORY). NOW! Also available in KRAFT GOLD.

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

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

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

2 MODEL BUILDER Bid SAVINGS AT ORANGE COAST HOBBIES LEISURE ELECTRONICS

=

OUTPUTS ROTARY WHEEL. ARM ADJUSTABLE ARM COM RESISTOR CAR WITHOUT RADIO - 6 CELL p a t ib l e w it h a l l d ig it a l r a d io s y s t e m s e x c e p t p r o Choose from Alfa, Vette or Porsche Body Style LINE SPECIFY RADIO $2j)

Comes with painted lexan body, durable lexan chassis, speed TORQUE 21 OZ IN TRANSIT TIME 0 3 SECONDSHOO DEG SIZE control, high speed electric motor, roar legal. (INCHES) 1 125 Η X 06W X 1 43L WEIGHT 24 GRAMS OR 846 OUNCES ------

NEW ASSOCIATED ASSOCIATED WANTTO BE A FAMOUS RACEDRIVER?...JOIN ELECTRIC “ ELECTRIC” THE ORANGE COAST HOBBIES RACING TEAM. 1/12 SCALE ELECTRIC R/C RACE CAR ASSOCIATED RCI Complete Car BY ASSOCIATED List $135. OCH Reg. Low Price S 1 19 95 T' SPECIAL LIMITED OFFER 3 m' 4 % RC100. ..$99.98 RC200...$149.95 6 CELL - THORPE..$195.00 wiih 1 /12th CHOI« Of 4NV B00V Ready to Run Scale TITAN CHASSIS... $149.95 - Less Radio RACING CAR

TECHNI MODELS r _ i Oil BLADES /5 Pk R/C GLIDER KIT SPECIALS 049/051 GLOW'PLUG Po List 65c CONVERSION WANDERER 72" $14.95 % 39c WANDERER 99” $22.88 BRIDI SOAR BIRDI $14.88 Ί . 9 9 (Fit X-Acto. PO. PIERCE PARAGON $39.88 Oixun, small $79.88 handles) CASS STEIN SKYBOLT (glass)

WISCO HB ENGINES #1-10% NITRO $10.80 12V 5A WET CELL LION FUEL #2-20% NITRO $12.15 HB 12 R/C-muffler »29 88 BATTERY HB 15 R/C-muffler 34.88 GALLONS #3-30% NITRO $13.50 HB 20 R/C-muffler 39 88 #4-40% NITRO $14.85 and CHARGER HB 25 R/C-mulfler 39.88 HB 40 POP 59 88 *13.65 HB 61 POP Formulated expressly for R/C car use. Consist- 79.88 ant formulation and cool running are the reasons the car racing champions use this fuell ONE OF THE FINEST LINES OF ENGINES : ORANGE COAST HOBBIES f u i l l v c u x QUADRA 14116 Bnookkimst St...W mtmínitcr, Calif. 92681 * HI TORK STARTER 2 CU. IN. FOR THOSE (714)819-8844 BIG BIRDS - Retail _ $149.95

TO ORDER SEND MONEY ORDER OR CREDIT CARD NO & EXP DATE ' 21.88 NO CHECKS · C O.D'S ADD $1 00 CALIF RESIDENTS ADD 6% TAX '39.88 U S SHIPPING CHARGES AK HI. APO FPO 3 00 MONOKOTE /IPS 00000 THRU 49999 2 7 5 50000 THRU 79999 >2 00 80000 THRU 99999 1 50 Opaques 8 Transparents *4.99 ■ f S r LARGE KITS. HEAVY BOXES ADD ADDITIONAL $1 00 Flats & Metallics '5 99

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DECEMBER 1978 3 WHY RUDDER CONTROL? STEP' BASIC: Start With Rudder Control Some expert liters think beginners should learn to fly by starting with an aileron-controlled model Maybe this will work out it an instructor pilot is available to make the takeoffs and BALSA RIB WING landings and stand by every minute of a flight, ready to take over if the student gets dis­ oriented. until his pupil gets skilled enough to manage by himself. But this process takes a lot of flights. Most beginners do not have someone willing or able to spend so long a time with them. We think a stable, rudder-controlled model is a lot less likely to get a novice into trouble from overcontrolling or not controlling. If the flier freezes up momentarily and can’t decide what to do next, a flat bottom sectioned, high wing model— like the Kadet— will right itself, or partially do so. if the sticks are allowed to snap back to neutral, giving him time to think. Most aileron-controlled models need immediate and proper corrective control movement to make them recover, an automatic reaction that a beginner has not yet developed. Many club instructors and hobby dealers have told us that two or three check-out flights on a Kadet are sufficient to allow a student to practice fly and learn without constant attention. And we know of modelers in isolated areas, with no one to help them, who have taught Designed by CLAUDE McCULLOUGH themselves to fly with the Kadet. LENGTH: 42 In. WING SPAN: 57 In. So remember— you may dream of darting around the sky with a sleek P-51, but first you WEIGHT: 4 Lbs. $34.95 ^SIGSf must have some flying time with our boxy buddy, the dependable Kadet. It's the standard ENGINES: .19 - 35 Cu. In. KIT RC-31 trainer-nationwide! FOR 3 CHANNEL RC EQUIPMENT

STEP 2 KIT NOW INCLUDES BEGINNERS CHECK LIST AND FLYING HINTS. INTERMEDIATE: Progress To Ailerons BALSA RIB CONSTRUCTION WING FEATURING BUILT-IN WASHOUT (fl/ LARGER SIZED MODEL - FOAM CORE WING WITH BUILT-IN WASHOUT

$39 95 KOMANDER Designed by CLAUDE McCULLOUGH Designed by CLAUDE McCULLOUGH When the student pilot feels secure flying the Kadet and can handle it capably, he is ready to Specially designed for novice RCers who want to move up from simpler models or prefer take the next step The Kavalier has a special wing design, calculated to make this tran­ to start with an aileron controlled airplane. The built-in stability, coupled with good sition easier. The precise amount of incidence change required to help eliminate tip stall is maneuvering and aerobatic ability, allows rank amateurs and low-time fliers to do a credit­ automatically incorporated as the wing is built in the usual way on a flat surface. In addition able job. Piloting boners that would clobber other airplanes are readily forgiven by the to this aid to stability, differential movement aileron horns are furnished in the kit. providing Komander. It will fly right down to the full stalling point without snap rolling or falling off less down and more up travel on the ailerons. Adverse yaw in turns is reduced by this on a wing. This enables slowed down, nose-high landings to be made. Coupled with the simple method and controllability of the model is greatly improved Find out what smooth shock absorbing qualities of the wing mounted gear, thr jr ground handling char­ flying really is with the Kavalier. acteristics make this a fine performer from rough or grass STEP 3 STEP 4 ^ S I G ^ r ADVANCED: Move Up To EXPERT : For The Graf KIT RC-29

ENGINES. 40 to .50 WING SPAN: 51 In. WING AREA: 550 Sq. In. LENGTH: 45-1/2 In. Designed by CLAUDE McCULLOUGH WEIGHT: 5-1/4 Lbs. After some flying time on the Kadet and the Komander. the student will be ready for this In the Komet. Maxey Hester has created a pattern ship that meets the requirements of the sleek stunter The Kougar is a carefully tailored design that will do every stunt in the book- most demanding competition flying, yet is equally at home at a Sunday afternoon sport even the lomcevak - and yet is not difficult for low-time pilots to handle. The wash-out flying session As in the Kougar. construction is speeded and appearance improved by a incorporated into the foam wing allows the model to be slowed down to a walk for the land­ formed plastic top made from ABS plastic that is easy to glue and easy to paint. It carries ing approach and flared onto the runway in a main-gear first touchdown without undue no load and serves only as a streamlined fairing on top of the rugged balsa box fuselage. stalling or snap rolling tendencies. The large amount of wing area for the 51" span keeps Featuring a foam core wing, this big kit takes only a short time longer to build than one of the wing loading low and aids handling characteristics. The Kougar is highly recommended the so-called ARF (almost ready-to-fly) types and results in a durable aircraft with lower as an introduction to low wing flying and AMA pattern competition. wing loading and higher flight performance, at a lower cost. See your dealer first! To order direct, a d d $1 postage under $10, postage free over $10. No C.O.D. PLACE YOUR ORDER N O W FOR SIG’S LATEST COMPLETE CATALOG - N O . 3 9 - $ 2 .0 0 POSTPAID SIG MANUFACTURING CO...... Montezuma, Iowa 50171 4 MODEL BUILDER MODEL# DECEMBER 1978

BUILDER volume 8, number 83 621 West Nineteenth St., Costa Mesa, California 92627 Phone: (714) 645-8830

STAFF CONTENTS FEATURES EDITOR Wm. C. Northrop, Jr. WORKBENCH, Bill N orthrop ...... 6 GENERAL MANAGER OVER THE COUNTER, Eloy M a r e z ...... 7 Anita Northrop R/C WORLD, B ill N o r th r o p ...... 10 EDITORIAL ASSISTANTS R/C FORUM, Hal d e B o lt...... 13 Phil Bernhardt Eloy Marez MRC “ TRAINER HAWK" REVIEW, Eloy Marez ...... 22 ASSISTANT GENERAL MANAGER "1 to 1” , R/C SCALE, Bob U n d e rw o o d ...... 24 Edie Downs THE FLIGHT INSTRUCTOR, D ave B r o w n ...... 27 ART DEPARTMENT Chuck Blackburn QUARTER SCALE AT MORGAN HILL, Monty Groves 28 Al Patterson MAMMOTH SCALE, Ron Shettler...... 30 OFFICE STAFF POWER BOAT WORLD CHAMPIONSHIPS, Jerry Dunlap 32 Georgi Gilleran R/C SOARING, 1978 NATIONALS, Ken Cashion ...... 39 Ron Hutto Pat Patton R/C SOARING TEAM FINALS, Dave Thornburg ...... 42 A. Valcarsel PATTERN AT THE 1978 NATIONALS, Sally Brown . . 45 CONTRIBUTING EDITORS R/C SOARING, Dr. Larry Fogel...... 48 STRICTLY SAIL, Rod C a r r ...... 50 George Aldrich Mitch Poling Dave Brown John Pond CHRISTMAS SHOPPING GUIDE, Eloy M a re z ...... 52 Rod Carr Bob Preusse FUEL LINES, George Aldrich, Joe Klause, Otto Bernhardt 60 Hal deBolt Fernando Ramos ELECTRIC POWER, Mitch Poling ...... Larry Fogel Larry Renger 62 Jim Gager Dan Rutherford PLUG SPARKS, John Pond ...... 66 Chuck Hallum Ron Shettler Bill Hannan Bob Stalick HALF-A SCENE, Larry Renger...... 70 Dale Kirn John Tucker R/C AUTO NEWS, Chuck Hallum ...... 72 Walt Mooney Bob Underwood HANNAN’S HANGAR, Bill Hannan ...... 74 CONTROL LINE, Dan Rutherford ...... 82 ADVERTISING REPRESENTATIVE F/F SCALE, Fernando Ramos ...... 84 WEST: Bob Upton, 24431 Caracas FREE FLIGHT, Bob S ta lic k ...... 86 Dana Point, California 92629. SCALE VIEWS Subscnptions $20.00 per year. $37.00 for two years. Single copies $2.00 Add $3.50 STEARMAN 4E, Peter Westburg ...... 37 for postage per year outside of U S. (ex­ cept APO). Copyright 1978 by MODEL BUILDER CONSTRUCTION Magazine. All rights reserved Reproduc­ GRUMMAN AG-CAT, Floyd Fitzgerald ...... 15 tion without permission prohibited FRANK EHLING’S “TRIANGLE” O.T., Bernard Shulm an ...... 68 Published monthly by MODEL BUILDER Magazine, 621 West Nineteenth St., Costa COUPE DE PLAST1QUE, Harry Steinmetz ...... 77 Mesa, CA 92627. Phone (714) 645-8830 Change of address notices must be re­ PEANUT VARI EZE, Hank Nixon ...... 79 ceived one month before date of issue that new address takes effect Send old address with new: old label preferred Post Office will not forward copies unless Cover: Floyd Fitzgerald, Pontiac, Illinois, designed and built this 2-1/2 inch scale Grum­ you pay extra postage Duplicate issues man Ag-Cat. The radio controlled model spans 7-1/2 feet, weighs 18 pounds, and is pow­ cannot be sent ered by an 0 & R engine turning an 18 x 6 Top Flite prop. The Kraft radio works w ith­ out interference from the ignition engine. Construction article begins on page 15. The Second Class postage paid at Costa 35 mm Kodachrome transparency was taken by Grant Boldt. Mesa, California, and additional offices

DECEMBER 1978 5 leading pilots. Their experience, ability Best known as designer of the ME-109 w o r k b e n c h and expertise were a decided asset, and Fighter, he also designed the world’s we looked forward to providing stiff first production jet fighter, the ME-262, • · · competition to the country we regarded which might have appeared in WW-II YOU BLEW IT, JIMMY! as a tough competitor, the Soviet Union. European skies if it weren’t for strategy As an official who has been involved “The administration reportedly de­ disputes among the Nazi high command in World Championship competition sired to send a message to the Soviet which held up production until too late, Union regarding administration dis­ under the aeromodeling branch of the when allied bombers wiped out the pleasure with a variety of USSR develop­ FAI, we have always been proud to be a Messerschmitt production lines. ments. It chose as a vehicle for that citizen of a country which has held its message the three military members of Willy had built and flowrt his own participation in international sporting the U.S. helicopter team by preventing glider at the age of 15, and by the age of competition above the petty political them from attending the championships. 25, after graduating from the Munich poopery and emotional distrust that has The three learned of the administration’s Technical University, set up his own occasionally disrupted otherwise decision while undergoing last minute aircraft company, in 1923. In 1927 Mes­ friendly activities. training in West Germany prior to the serschmitt merged with the Bavarian We were proud, that is, until we read flight into Russia. M otor Plane Works, becoming manager the excellently written editorial in the "NAA does not dispute the govern­ and chief designer. September NAA Newsletter, by NAA ment’s right to control its employees. Executive Director, Vic Powell. Part of By coincidence, his death came on the But we regard the Carter administration’s that editorial follows. day that Great Britain marks as the anni­ action as heavy handed against a non­ "NAA was especially disappointed versary of the Battle of Britain, 1940. The profit organization attempting to meet and disheartened recently when the RAF claims to have shot down 185 Ger­ the lawful purposes to which it sub­ Carter administration injected politics man planes on that day. scribes, and from which the nation into the United States team attending benefits. They chose to insert politics in GIT YER HOT STUFF! the III World HelicopterChampionships, an activity that is working to keep On a lighter no'e (BEEEEP . . .!), in Vitebsk, USSR, July 31 to August 4, political interference out. through an agreement with Bob and Bill 1978. The action was in direct conflict "Politics and international champion­ Hunter, of Satellite City, a free sample 7- with the first goal of the Federation ship aviation do not mix. gram bottle of "Hot Stuff” will be Aeronautique Internationale, the world "It was true when representatives of included with each shipment of Uber body for sport aviation, which NAA the United States joined with other Skiver knives or M odel Builder binders serves as exclusive U.S. representative. nations to form the FAI in 1905, it is just amounting to $10.00 or more in value. FAI’s first aim is (to make). . . evident the as true today. The Carter administration’s The 7-gram bottle has a retail value of essentially international spirit of aero­ action against the U.S. helicopter team is $1.95. nautics as a powerful instrument for bringing all people closer, regardless of an international embarrasement of this Incidentally, by sending a stamped nation.” any political or racial consideration. (FAI addressed envelope to Satellite City, Box STATUTES). GOODBYE, WILLY 836, Simi, CA 93065, you’ll get a free 4- "It is a goal to which the Carter Probably the most famous and most page summary of tips and illustrations administration ought to find agreement. misspelled name to come out of World for uses of Hot Stuff. Our hint... put the “ Three members of the 11-person War II aviation was Messerschmitt. His bottle upright on your bench and U.S. helicopter team were military first name was Willy, and he died on squeeze out that last drop when you’re pilots. The three had proven themselves Friday, September 15,1978, at the age of finished for a while. Then the tube won’t in training, on their own time, to be 80, after a major surgical operation. clog! · 6 MODEL BUILDER OVER THE COUNTER

• Many so-called "package” deals re­ dressed at 400 S. Indiana St., Hobart, IN $1.10 for the 3/4,98c for the 1/2, and 65c mind me of the car salesman telling me 46342, while Boynton & Associates is at for the 3/8 scale. that the cigarette lighter is free. Not so, Clifton House, Clifton, VA 22024. All down at the local model em­ in the case of Midwest Products' "Per­ * * * porium,and all from Williams Bros., Inc., former”, two-channel powered glider/ 181 Pawnee St., San Marcos, CA 92069. Builders of 3/8-inch to the foot scale trainer, and the companion "Radio * * * Control Flying for the Non-Modeler” air-cooled radial engine models will book, published by Boynton and Asso­ especially be happy to see these new Two new K&B's have made the scene! ciates. Universal Dummy Engine Cylinders Both are 7.5 cc displacement, which Both are designed and written for the from Williams Bros. No more having to every one of you will quickly and men­ person whose first exposure to R/C took stick washers together, or to wrap thread tally convert to .45 cu. in. place last Sunday after he/she took a around a dowel to simulate engine Our accompanying photo shows the wrong turn and wound up at the local cylinders . . . these will do the job 7.5 cc Ducted Fan version, specially flying field. The "Performer” is a 72- neater, faster, and lighter. equipped with a Perry Pump and Pump inch, 490-square-inch, .049 model; the And no longer will you have to avoid Carburetor. Max power and reliable kit features a solid pre-shaped balsa those engine-in-the-breeze models, as throttling should be obtained right out duplicating the powerplant will be a wing, box construction fuselage, and of the box. snap. includes all hardware and control rods. The marine version of the 7.5 is a rear- It is fully described in the book, which Available in packages of 5, the cylin­ ders are priced at $1.30 for the 1 inchers, intake model, equipped with an exhaust includes plans for its construction if one butterfly throttle and water-cooled does not desire to purchase the kit. head. Both versions are ABC, and both • They are now on the way to all dealers, use a 7075-T6 aluminum connecting rod, and can be purchased together or which is machined from solid bar stock separately. and bushed at both ends. Two ball Midwest Products Co. can be ad- bearings, beefed-up crankshafts, and K&B’s quintuple porting are other fea-

Receiver-operated ON-OFF electric motor Universal dummy engine cylinders, in 3/8" New K&B 7.5cc ducted fan engine. switch, from Astro Flight. scale, by Williams Bros.

Midwest Products' "Performer", half-A powered glider. "M ulti Charger", from L.R. Taylor & Co. (Isn't there supposed to be an " i" in "transmtters"?)

DECEMBER 1978 7 "Super J", 1 /8-scale R/C race car, from Delta Manufacturing. Cessna Agwagon, built from plans available from Repla-Tech. tures of these new powerplants. battery, thereby eliminating the need to Models already equipped with 6.5 cc carry another battery. Special circuitry is engines can be immediately converted included that turns the motor off when to these new more powerful versions, as the drive battery gets low, but still they fit the same mounting set-up. retains enough current for operation of Look for these brand new state-of- the radio. the-art engines at your favorite hobby Both versions are available now, and store. They are products of K&B Manu­ are priced at $29.95 for the Standard, and facturing Co., 12152 Woodruff Ave., $39.95 for the Deluxe versions. From Downey, CA 90241. your local shop, or from Astro Flight, * * * Inc., 13377 Beach Ave., Venice, CA 90291. Having trouble controlling your elec­ * * * trons? If so, we’d like you to meet a new miniature electric motor control which Owners of the popular Quadra en­ is now available from Astro Flight, Inc. gine will be glad to learn about these This device provides ON-OFF opera­ two goodies. First, a beautiful cast aluminum tion of your airplane, car, or boat motor, mount, drilled and machined to fit the and is controlled directly from the servo output plug of your R/C receiver. An engine exactly. It provides the solid support so necessary for proper opera­ additional bulky and expensive servo is tion, and allows easy side-thrust adjust­ therefore not required. Fuel line clamp, from Octura Models. A deluxe version is also available, ments to be made. Catalog No. Q-3, which contains a voltage regulator to $16.95. power the radio receiver from the motor As a companion to this mount, there is a special neoprene backplate, cut from 3/16-inch rubber, and designed to fit between the mount and the firewall. It will eliminate a large percentage of the engine vibration. Catalog No. Q-3NEQ. And if noise is a problem with your Quadra, you have your choice of muf­ flers from a series designed for upright or inverted engine installation. These mufflers are made of aluminum and require only two screws for attachment. A length of heat and fuel-resistant neoprene tubing is supplied to extend the exhaust out of the cowling, if de­ sired. No. QM-IST, for inverted engine, New mufflers for Quadra engines, by Quarter Cast-aluminum Quadra mount, by Quarter side exhaust, is $19.95; QM-IBT inverted Headquarters. Headquarters. Continued on page Π 9

Fiberglass hulls from Futuraglass Design are, from left to right: the "Magnum" tunnel hull; .40-.60 Scale Hydro; and .20, .40, and .60-size Deep-Vees.

8 MODEL BUILDER (M*

R/C WORLD ...... 10 R/C FORUM ...... 13 GRUMMAN AG C A T ...... 15 MRC "TRAINER HAWK” ...... '.22 1 to 1 SCALE ...... 24 THE FLIGHT INSTRUCTOR...... 27 QUARTER SCALE. MORGAN HILL . . . 28 MAMMOTH SCALE ...... 30 POWER BOAT WORLD CHAMPS...... 32 Big radio controlled Unlimiteds thunder into the countdown start of 1978 SOARING N A T S ...... 39 a heat during the R/C POWER BOAT WORLD CHAMPIONSHIPS, SOARING TEAM F IN A L S ...... '#2 on Lake Washington. Seattle, Washington, in early August, 1978. 1978 PATTERN NATS ...... 45 Photo by Jerry Dunlap. Complete story on page 32. R/C SOARING ...... 48 STRICTLY SAIL ...... \ . . 50 _ FUEL LINES . . . . : ...... 60 ELECTRIC POWER ...... 62 - R/C AUTO NEWS ...... 72 δ |3£* ΐ Τ S span Aeronca "Master" was one of the many "monster" models seen at the recent Las Vegas meet hosted by the QSAA. Also, like many, it was not 1 /4-scale! Ship weighs 32 pounds. Lots more info and photos of the meet next month.

EWORLD By BILL NORTHROP • When we wrote about our own four Soaring and Pylon proposals were un­ work is done. Now is the time to review R/C proposals in last month’s column, knowingly duplicated by other pro­ all the proposals, as published in Model we had not yet received, nor were we posers. In some cases, the same rule Aviation, and contact your R/C CB aware of, the total onslaught of R/C proposal was made by three different member. He needs your input! proposals that had come into AMA individuals. At least the three modelers ON THE OTHER H A N D .. . Headquarters ahead of the September 1 and their co-signers agree on the Many radio control modelers, in fact deadline. We re sure the new R/C proposal! the wide majority, couldn’t care less Contest Board Chairman, Joe Friend, Unfortunately, the deadline for the about disciplined competition. Most suspects that we had a hint of what was preliminary ballot by the contest board modelers enjoy it as a hobby, not a coming, when we bowed out of the is December 1, so time is short. Mean­ competitive sport, and prefer to build chairmanship after 10 years. Nolessthan while, you should be studying the and fly for their own amazement and 82official proposals have been circulated proposals that affect your main interest their own type of relaxation. We say to the R/C Contest Board members for and give your opinions to your district their own type of relaxation, fo r as the 1980-1981 rules period (second only contest board member. Detailed tension-ridden as disciplined compe­ to C/L, which nosed us out with 87!). Of changes of proposals aren’t important tition may seem to the sport flier, it is these, 24 are on pattern, 17 on soaring, 15 now, the main thing is to get rid of bad relaxation to the competitive flier, who on 1/2A Pylon, 17 on Quarter Midget, ones, and keep the others . . . even if gets his or her kicks from the "th rill of and 3 have to do with new types of they need reworking. The intermediate victory and the agony of defeat.” events. For the second rules period in a ballot, which will come along in early Sport flyin g actually has tw o cat­ row, Formula I Pylon had no proposed 1979, will include all the cross-proposals egories. One is for the totally solo flier, changes...... suggested changes to otherwise who wishes only to fly when and where Incidentally, there really aren’t 82 acceptable rules proposals. the time and place is most appropriate rules change possibilities. Many of the So . . . don’t complain after all the for that person’s schedule. The other is PHOTO BY RANDY RANDOLPH

Which Quadra is a dummy? No, it’s not a Quadra twin. Cylinder on Mark Morgan, Dallas, Texas, sexed up his MB "D ragonfly". Has .15 Aeronca's right is bolted on for appearance . . . also helped balance. engine, open cockpits, spoilers, and glider and bomb release.

10 MODEL BUILDER Robbie Wallace applies body English, to no avail, as Bob Wallace Robbie Wallace gets a little closer than his dad. He was second in the misses balloon with K&B 40 powered Sig Kadet. Bud Gay photo. event at a club Fun Fly. Read more about it in text.

Keith Palmer, Bristol, Conn., makes a direct hit on the balloon (arrows point to pieces) to win Fred Essel makes a ribbon cut, using Keith the event. Andrews Trainermaster, K&B 40, Futaba radio. All fun fly photos by Bud Gay. Palmer's Trainermaster. for the flier who enjoys informal, un­ only 14.9 seconds, Robbie Wallace took Sullivan, connected to a remote A.J. disciplined competition . . . maybe 17, and then the time jumped to 1:08 by U-reely with attached 67-1/2 volt battery, against others, or maybe against the Fred Essel. actuated a relay in the model to switch clock or the tape measure, usually at The,Taxi Race times were interesting, from low to high speed. local club functions. with Glen Sicotte getting out and back, “ The Stinson was finally retired when Take for instance the Central Con­ plus busting the middle balloon in 15 Mike turned to flying RC. It survived the necticut R/C Club. On August 13, the seconds! In fact, the longest time was following years stashed in the attic, not club held a Fun Fly in which the com­ only 23.6 seconds. to mention several moving van experi­ petition consisted of a Taxi Race, Ribbon Now get this for Sport Flying . . . Bob ences. This year, and many RC ships Cut, Estimated Time Flight, and Balloon Beaudette took off by the ribbon, made later, resurrection to radio control!! Burst. Some of this month’s photos, by a full circle, and cut the ribbon in 7 “ No changes were made except for an Bud Gay, depict the action. seconds! And to prove the watch was engine change to an Enya .60 RC and a working. Bob Wallace did it in 7.5 Kraft radio installed. Using three chan­ In Estimated Time Flight, the con­ seconds, and Tom Munsell took 8.1 testant must give up all watches or other nels,' elevator, rudder and engine, the seconds. By contrast, the longest time Stinson flew very well. One unhappy time pieces, is then timed from take-off consumed for the job was 2 minutes, 51 during flight, and until wheels stop landing caused the No. 1 rib to disinte­ seconds. rolling on the landing. The one coming grate. This rib contained proper align­ nearest to 90 seconds is the winner (no C/L PLUS 32 EQUALS R/C ment. To rebuild, this meant plotting the help from the audience, please!). In addition to the above info on fun rib exactly. For Balloon Burst, the flier is timed flys, Bud Gay,, proprietor of Bristol "So Mike dug into the big balsa scrap from take-off alongside the 7-foot pole Hobby Center, Bristol, Connecticut, box for a sheet of 1/8 balsa to start that supports the balloon, a complete sent us the following story. rebuilding ... would you believe ... circle, and until he hits the balloon. Time “ The year is 1947, place is Page Park, from the myriad of scraps saved for is official only if the balloon is busted. Bristol, Conn. State controline cham­ years, up comes a partial sheet stamped In Taxi Race, the contestant taxies out pionships in progress. Scale event is Cleveland Models Stinson SR 70 Rib to three balloons staked to the ground next. Sheet. On the sheet is printed No. 1 rib, fifty feet away, busts the middle one, and "Checking the entries, it’s no contest. complete and in perfect condition. taxies back. Shortest time wins. A beautiful seven foot Stinson Reliant SR "Thirty two years in the scrap box!! 'As for Ribbon Cut, the ribbon is 10 dwarfs all other models on the line. That rib waited a long time to become suspended about 4 to 5 feet above the Kitted by Cleveland Models and mag­ airborne, but it did make it. How patient ground. Pilot takes off from the ribbon, nificently built by Michael Adajian, of can a rib be? flies a full circle, and then has at the New Britain, Conn, it looked first place “ Stinson is back in the air and making ribbon. Shortest time wins. and took first place. up for the lost years in attic space.” To give you something to shoot for, "A t every meet entered, State, Re­ FAN HAS ARRIVED the Estimated Time Flight was hit on the gional and M irror, it always finished in After several years of experimentation nose by Dick Bellanger, jack Anderson the top three places over a period of and refinement, the Skyhawk fan jet was 2/10ths of a second long, Fred Essel eight years. Power was furnished by an model by Bob Violett is no longer just a was 7/10ths short and Sue Degennaro Atwood .60 engine with dual ignition specialty item and one which is only was 8/10ths short. providing low and high speed. Seventy seen at special affairs, flown only by Bob In Balloon Burst, Keith Palmer took feet of insulated lines provided by Matty himself. DECEMBER 1978 11 Eight years as a C/L, many years retired, and now flying again in R/C, Adajian's Stinson.

The Skyhawk II is now a proven fan jet model, and is available with accessory packages. The semi kit includes epoxy fiberglass fuselage, molded tailpipe,and wheel pods. Also included is a high efficiency internal ducting system, clear plastic canopy, detailed plans, photo Barbara Hayes, Burlington, Conn., offers a pleasing background for Mike Adajian's 32 year οια instruction book (60 technical photos), Cleveland Stinson SR 10. Interesting Stinson history w ill be found in text. and adhesive backed mylar rib and former templates. Provisions for retracts and flaps complete all requirements for a total ducted fan propulsion model. Price of the semi kit is $129.95. The Skyhawk fan unit is $75.00. Also available is the Avionics Dorsal Pack ($12.00), a Drop Tank ($15.00), and Blue Angel Decals ($15.00). Plans, templates and instructions, if purchased separately, are $20.00. Bob placed second in Sport Scale at the 1978 NATS with his Skyhawk II A-4N model. His address is 26516 Aiken Drive, Clarksburg, MD 20734. ·

Latest version of Bob Violett’s Skyhawk is this A-4N, with avionics dorsal pack and long-range fuel tank. Kit is fully described in text. Ship placed 2nd in Nats Sport Scale.

Maryann Parenti, Bristol, Conn., holds husband Phil's Big H Ray. Debbie Kelly, Dallas, Texas, with husband Joe's "Paskey" (June 78 K&B 40. MRC radio. Monokote with 3M striping. Andrews kit. MB) designed by Randy Randolph. Randy also took photo.

12 MODEL BUILDER reputable service center for you. running gear is sound and the body will 2) What brands: Decide on a brand provide the transportation. Like the which you can easily get serviced quickly "deluxe” car, the "Expert” series simply and reliably; in other words, a reliable adds some frills, perhaps a little more service center within one day's shipping precise control and perhaps a bit more time (500 miles) of your home. There will comfortable transmitter. These things be annual "check ups” , and when you naturally add to the cost. The "Compe­ finally do need service, it usually is at the tition” series is another story; this type R/C * same time you wish to fly, so time is was created by the serious competition important. As to a particular brand, this fliers looking for easier ways to get F O R U M with used to be important, as some brands perfection in their maneuvers. An all- had outstanding advantages. Thankfully, out effort was made to fill this demand, today, if you watch the performance of with the result being the use of funda­ Hal deBolt any of the top brands, you will have a mental "computers” as transmitters. P.O. Box 147 hard time seeing any difference. R/C These transmitters can be programmed Buffalo. N.Y. 14225 equipment has stabilized, so that it is to do most anything a flier wishes . . . Mail in your questions or concerns. hard to see any real difference between they have been developed that far. As a them all. result, they can only be a "toy of the • This is being written right in the 3) Stick configuration: There is pro­ experts” , for in order to use one, you middle of the busy flying season. My bably more kibitzing-type advice not only need to be a pilot but also a work is pressing . .. everyone wants handed out about this factor than any computer programmer and operator! overnight service, as they do not want to other. However, the fact is that both The "Sport” types have obviously miss a single flying day unnecessarily. . . single and two-stick types are most done R/C, as a whole, the most good, as and our Circuit races seem to come up successful, so for the beginner, there is far as drawing new people into it is too quick for proper preparation. There little advantage to either one. The concerned. The competition in this line never seems to be enough time to get sensible advice is to choose the con­ has been fierce between the various ready with that “ new” idea. Would the figuration most popular in your area; in brands and even the im ports. Sales old phrase "Time Flies” fit? Seems so to this way you, will find it easier to obtain competition being good for the con­ me. However, the point to be made is instruction from an experienced flier sumer, we now find that we can have a that this is a great hobby and sport, who is accustomed to your style of most reliable and usable R/C system at a simply because we never run out of new transmitter. very attractive price. The offerings are things to try and do! 4) Servo type: Here you will have to complete enough so that by spending a During the flying season, we see more project yourself a bit and have some idea minimum amount, the newcomer will rank beginners than at any other time. of what direction you will be taking in have a system which can fill his every Someone accidentally stops by the flying R/C. If you feel that the majority of your need through the first few years of his field or contest and is immediately flying will be with small models (school­ R/C enjoyment. impressed. When someone tells him yard types), the miniature radios should Finally, most newcomers feel that they that he can do it too, the newcomer is off be your choice. Although small, these are making a large financial investment to find the bits and pieces required to still will handle typical "trainers” reli­ when entering R/C initially. To many it get into the air. Advice, of course, comes ably. Should you have visions of “ Mam­ may well be, but we would suggest that from all directions, and the most impor­ moth Scale” , go for the larger radios; they compare it with entering most any tant decision winds up being the R/C most trainers will still have room for other sport before complaining too equipment. With zilch for knowledge, these. There is, of course, an "average loudly. However, it should be remem­ he is confronted with how many sticks, size” radio, and if you just cannot make bered that, in modeling, any investment number of channels, frequencies, and of up your mind as to what direction you has one financial feature. Modeling course, what brands. Even after he will be heading, do not hesitate to equipment, and especially R/C gear, has comes to some conslusion on these choose them. Like anything else "aver­ built-in equity. It maintains much of its questions, he finds that the brand he has age” , there are few places where they value over a substantial number of years. chosen can cost up to 3 times that of the will not be usable. We would like to cover a few points lowest priced system. Even if the pros­ 5) What price range: Fora good many brought up in a few most welcome pect is the Cadillac buyer type, he often years, the manufacturers produced only recent letters. Theodore Off, of Ventura, wonders if he should buy the highest one line of equipment. All you could ask California, takes us to task for a couple of priced, simply because he does not for was the brand; the choice was only points in recent columns, which only between brands. Because the tech­ know whether he will stay with the proves once more that neither Model hobby or not. We see these people and nology was still new, manufacturers Builder, nor I, is God. Unlike the Savior, were spending development time im­ their problems nearly every day, and it is we can be wrong! proving and trying new ideas. In short, important to give them the proper We mentioned "walking beams” as a they were looking for "the” way to guidance. We would like to present useful method of transferring servo produce R/C equipment. some time-worn advice which has power to the control surfaces. Ap­ proven successful with these people A few years ago, "the” way was parently, there was something wrong over and over again; following this can, finalized, and today, no matter what the with the diagram shown, which was only in most cases, create another sustaining color of the box is, you will find that the for descriptive purposes. Ted advises member for your club. These are the same methods of operation and pro­ that all pivot points should be equally answers to the questions we hear from duction are used by all of the familiar spaced for such a system to work prop­ the rank beginner: brands. O f course, there are specific erly; apparently our sketch did not 1) Buying new or used equipment: If differences, but the basics are all the show equal spacing. it will not stretch the pocketbook too same. With this status quo, manufac­ We were also talking about the aero­ badly, do buy new equipment; it is the turers found development time avail­ dynamic balancing of control surfaces. best assurance of reliability to start with. able to use in producing systems for In other words, methods of pivoting If money is important and a savings specific purposes. At this time they are them which would tend to equalize the would help, there is nothing wrong with offering about 3 classes of systems, pressure on each side of the pivot point or used equipment that is not too old and which generally could be called “ Sport” , line. We suggested that a pivot point at has not been abused. However, in "Expert” , and "Competition” . The 50% of the chord of the control surface buying used, it is good advice to look for “ Sport” systems are simply basicsystems would create an almost perfect pressure “ reconditioned” equipm ent, or else that provide all that is needed to suc­ balance. Ted suggests that the theoreti­ have a stipulation in the agreement that cessfully and continuously fly R/C cal pivot point would be 25 to 30% back the seller will have it checked out at a models. Much like a “ standard” car, the from the leading edge of the control DECEMBER 1978 13 surface. wants to know how it can be done. A only, the reason being that the only real My understanding would qualify both small addition to the cycler will make it importance is how much power the statements a bit. We are looking, ideally, possible, but if his knowledge of the transmitter if putting out. If the output is to equalize the pressure on both sides of problem is such that he does not know not normal, then it is of little value, at the the pivot. To do this, both sides of the how, he would do well to have a quali­ moment, to know that the battery pivot must be exposed to the same fied techincian do it for him. The pro­ voltage is down. Most important is that pressure potential. All control surfaces cedure is simple. Place a low ohmage the meter will show a decline when are attached to a fixed surface. Because potentiometer in one lead from the there is a problem of any sort in the unit. of this, there is always some disturbance cycler so that it is in series with the 225 The amount that the meter reads is of created by the fixed surface which will battery. Place a milliameter in series with little importance also, when compared reduce the pressure on the leading edge the battery in the other lead. Adjust the to that of some other transmitter. The portion of a control surface, as com­ potentiometer until the milliameter amount that the meter reads is optional pared to the pressure present on the aft reads a current flow of 22.5 MA. Remove with the manufacturer; he can adjust the portion. Of course, the thicker the fixed the potentiometer without changing its circuit to give any reading on the scale surface at the leading edge of the adjustment and take an ohmage reading that suits him! What is important is to control surface, the more the distur­ from it to find the resistance that was in know what your particular transmitter bance and the further the leading edge use. A jumper wire can then be made meter reads when your transmitter is in of the control surface will have to move which suits the cycler lead. A resistor perfect operating order, not what some­ before encountering the “ clean” air the matching the resistance reading is placed one else’s similar meter reads. This control surface’s aft portion is already in series in the jumper lead. Then, any would be the maximum output for your enjoying. What all this amounts to is that time the 225 MAH battery is to be unit. It should read this every time you Ted has said that if the total pressure checked, the jumper is added to the use it. The meter will read zero with the affecting a surface is 15 lbs., as an cycler lead. switch off. Anytime the hand on the example, 5 lbs. applied forward of the Paul’s next Ni-Cd question is simple, meter retreats from its normal maximum pivot will equal 10 lbs. applied aft of the yet can be complex. He asks how a towards this zero point when the switch pivot. What is important to remember is "faulty” cell can be detected in a pack. is on, you can be assured that there is a that you must have the correct dif­ His use of the word “ faulty” adds the problem of some sort. ferential in pressure to achieve success. complexity. Ni-Cds can be faulty by Obviously, the condition of the trans­ Obviously, pivoting the surface at the being dead, weak, or bothered by mitter batteries controls the output of 50% station w ill not provide equal vibration . . . and being the rascals the unit. With most transmitters, as the pressure because of the disturbance that they are, probably from other voltage drops, so does the output. With from the surface it is attached to. It will mysterious reasons! many types, the condition of the bat­ be less on the forward surface, in direct Finding a dead cell is the simpliest, of teries can be related to the RF output. roportion to the amount of distur- course. Taking a voltage reading of each When the voltage drops, the RF output Cance. individual cell will find one with no reading will also show a decline, pro­ To expound a bit further: theory is voltage; it will be dead as a door nail! viding a warning that the batteries are great, but what is practical? In this case, Paul asks if it is OK to replace just the one below normal. However, unless you it is obvious that the pivot location, to cell. Remember, they said to never do have experience with the unit, do not achieve aerodynamic balance of a con­ that with dry batteries? Replacing one take this as gospel. There are some trol surface, will vary according to the cell in a Ni-Cd pack is perfectly alright, transmitters which will maintain a stable surface it is attached to. Generally providing all of the other cells are in RF output over a sizable voltage drop, speaking, you might say that an aileron good condition. So, the procedure in thus no meter change will occur, even if or flap attached to a rather thick air- this case would be to run a load test on the batteries are low. In conclusion, foiled wing will require the pivot to be the remaining cells; if they pass, replace remember that Ni-Cd batteries hold further back than would a sheet-type the one cell. If they appear marginal in their voltage until practically the end of elevator or rudder attached to a sheet- any way, do yourself a favor and replace their capacity. Thus, once the voltage type stabilizer or fin. It should also be the entire pack! Weak cells are not all and meter reading starts to drop, there is understood that complete aerodynamic that hard to find. Charge the pack fully very little left in the battery. This is one balancing is not advisable either; in fact, and then put it on a load test. Watch the time when that "just one more flight" it is seldom used. One of the major voltage, and the minute it drops below can (will!) be a fatal one! problems with control surfaces of all the rated value, remove the load. Paul also had a glider in which the kinds is that they tend to flutter. Con­ Quickly check the voltage of the indi­ elevator was operated by a Nyrod which trolling flutter can be a nasty problem. vidual cells. Place the load test back onto was not supported between the servo One of the best flutter controls is to be the pack. The instant the voltage once and the elevator horn. In flight, there sure that there is a pressure differential again drops, start measuring single-cell was elevator flutter. Supporting the about the pivot. When the pressure is voltages. The weak cells will read a lower Nyrod cured the flutter. Apparently it greater behind the pivot, tne control voltage than the others. Minute differ­ was the Nyrod fluttering in tne fuselage, surface will tend to “ weathervane” in ences are of little concern, but a more than the elevator itself. Question the airflow. Of course, when you add a difference of a 1/4 volt or more would is, would the fluttering Nyrod affect counterweight ahead of the pivot, you be cause for concern. the servo, similar to a fluttering elevator? have in effect created a weathervane in Paul has another question very seldom The answer would seem to be that it its most fundamental form. The final answered in equipment instructions. His makes no difference what is fluttering; if point would be that, like all of aero­ transmitter, like most, has a meter. He it is attached to the servo in any way, the dynamics, the balancing of control does not understand it. Transmitter vibration will be transmitted to the servo surfaces is a compromise; you must find meters fall into three types. One type and there can be damage. the proper combination of all the factors will either read battery voltage or con­ Final question is; If there is a load on involved to obtain success. dition, the second will read both battery the elevator great enough to cause We also had a nice letter from Paul condition and the radio frequency (RF) flutter, will this load affect the servo. The Spreiegen, of Washington, D.C., with output of the circuit. Generally speak­ answer here is that, in general, a load will some questions which may be of some ing, "RF” is an indication of the power not affect a servo, providing the load is help. His first questions relate to Ni-Cds, the transmitter is actually transmitting. If no greater than the output of the servo. which is a subject that I hope to devote a the transmitter had either of these two It is vibration which causes the damage future column to, when time for re­ of meters, the instructions would ex­ in normal cases. search is more free than now. Paul has a plain the operation, as they both are To clarify a bit more; a control surface battery cycler which is set up to test 500 uncommon with R/C transmitters. in flight always has a load on it. It can be MAH batteries. He wishes to also use it The third type of meter, the type assumed that when the surface is in for checking a 225 MAH battery, and usually provided, measures RF output Continued on page 112

14 MODEL BUILDER PHOTOS PHOTOS BY GRANT BOLDT GRUM M AN · Ag-CAT · By FLOYD FITZGERALD ... A Mammoth Scale model (2-1/2" = V) for 2 cubic inch engines or belt-drive 60's, the Ag-Cat spans 7-1/2 feet, weighs 18 pounds, and is a totally realistic flier. Already a trophy winner.

• Everyone has that certain time, place, person, or thing indelibly etched into his memory. Mine, as a lad of 9 years, was of being literally thrown out of bed early one summer morning by an old Stear- man Duster, flying right by my window. With more speed than I ever, could muster getting ready for school, I was dressed, down the stairs, and outside watching the Stearman doing its thing. From that time on, spray planes (bi­ planes in particular) have held a special fascination for me. My first impression of the Ag-Cat was predictable. It was even better looking than the Stearman! A strictly utility-type airplane, it has Similar to the photo angle on the front cover, this pose creates a very realistic appearance for , wires, scoops, etc., sticking out the model Ag-Cat. If you have any doubts, compare this with the photo below. all over. Beautiful! Not being a designer or scratch builder of any note, I kept waiting for an CONSTRUCTION FUSELAGE article on the Ag-Cat to appear in one of Before beginning construction, you Construction is begun with the basic the magazines, but it never happened. If must decide whether you will build to framework. Two sides are built, and I was going to have one, I would have to Sport or Precision scale. The plans will when dry, the cross members, cabane build it myself! After receiving a set of do fine for Sport, but you should visit , and landing gear blocks are glued three-views from Grumman, I took the your friendly local Ag-Cat (they seem to in. Keep everything in line! Note that easy way out by sticking the whole works be everywhere!), with camera and tape the fuselage assembly from section B in an old Navy opaque projector and measure in hand, for the exact scale forward to the firewall is built separately, blowing it up to the scale I wanted. Not version. I have yet to see one that looks and then attached to the main fuselage very kosher, I suppose, but it worked. exactly like the next one, so you should structure. Add the firewall, following After a lot of eyeball engineering on the stick to one particular example. Not the plans as to correct location. Next, construction, I ended up with a damn being a beginner's project, we will sheet the fuselage sides with 1/16 balsa fine flying airplane. assume that you will be able to decipher at noted areas. The section from B HISTORY the plans, so we will cover only the more forward is sheeted on all four sides for The Grumman Ag-Cat was designed complex items. strength. in the late fifties to take the place of the fast disappearing Stearmans, N3N's, and other types that were wearing out beyond use in the hard-flying, chemical­ eroding field of crop dusting. The design parameters included ease of flying (stable), maintenance simplicity, and pilot safety. This last point is well demonstrated by the N numbers on my model. The full-size plane that bore those numbers no longer exists, but the pilot does! (He lost it in a while spraying.) Whatever the design reasons, she looks typically Grumman, harkening back to the days when the Wildcat and the Hellcat were engaged in the more serious business of trying to blow the other guy out of the sky.

DECEMBER 1978 uacnina Ί3αοΐΛΐ 91 %

DECEMBER 1978 FULL SIZE PLANS A V A ILA B LE -S E E PAGE 128 17 18 FULL SIZE PLANS AVAILABLE - SEE PAGE 128 MODEL BUILDER Pinning top wing in place. Tank is a Superpoxy Same pliers, same hand, different job. Attach- Radio hatch, spray tank and shut-off valve. thinner can. Gravity feed, like real! ing strut. Note rigging wire attach point. Tube connects to spray booms.

Nice detail shot of 1 to 1 ship, for scale nuts. Note size of exhaust pipe, exhaust blast protector Close-up of steerable tail wheel assembly. sleeve over flying wires, and fairing under bottom wing. Usual wire rig won't handle this job.

Install cabane struts, keeping them glued on. Install plywood on the bottom duplicate this with 3/16 wire, but after vertical to the top longerons. All of the fuselage ahead of wing saddle. much swearing, broken wire, and formers, stringers, and wing saddle areas The canopy is built up as per the smashed and burned fingers, I threw the are now completed. Sheet the top of the drawings; refer to plans as to correct whole mess away, and made for the local fuselage from cockpit forward to section location of all parts. This step could be hardware store. I eventually came up B. Watch it here, if you intend to go done away with if you have access to a with a 1/4x1-inch strap of aluminum, Precision Scale. The top of the fuselage vacuum-form machine, and can carve a used for molding around large plate from the windscreen to the rear cabane mold. The canopy itself adds nothing to glass windows. While it is not exactly strut is actually the top of the spray bulk the structural strength of the fuselage. scale-like in cross section, it has proven tank in some examples, and may differ in LANDING GEAR quite serviceable. Maybe you scroung­ cross section from the plans. Stringers, This proved to be a sticky area for me ers in the crowd can come up with a all around forward fuselage section from to handle. The gear on the full-size Ag- better substitute. In case you are won­ B to firewall are added, and sheeting Cat is of the Cessna spring type. I tried to dering about the method of attaching

Strange method of fueling, at least for a model airplane! It’s poured Designer Floyd Fitzgerald applies manual starter to O&R ignition through funnel into tank. Center section stays with fuselage. engine. Radio is unaffected by ignition interference.

DECEMBER 1978 19 20 FULL SIZE PLANS AVAILABLE - SEE PAGE 128 MODEL BUILDER the main gear to the fuselage, don't worry; it has been crash tested by Yours Truly! On one of the later test flights, the engine quit (traveling needle) too far out over the bean field next to the flying site to make it back. Everyone knows the sink rate of a biplane with no power. Trying to make the best of a bad situa­ tion, I set her down as easily as possible, but the soft ground was just too much. She hit with a mighty "whoomph!” heard clear to the other sideof ourfield. Naturally, there was an audience, and everyone started out to help pick up the pieces. The three nylon bolts had sheared, and the only damage was a bunch of dirt in the cylinder fins! Didn’t bust the prop, even! (At six bucks a throw, that helps.) I have never had it fail under normal takeoffs and landings. WINGS Nothing too far-out here, but do build the top wing center section first. Do not sheet the top of this section, or the tops of the wing panels, until the locator The ideal ARF model! The Ag-Cat knocked down for transporting. Note spray boom along dowels are in place. Build the wings flat of bottom wing. Receiver switch is inside canopy. on the plans by laying down the bottom sheeting first, and working from there. Remember your dihedral angle at the root ribs. After the panels are done (except for the top sheeting), place the center section (less its top sheeti ng) over the plans, along with one wing panel. Block the panel up to the correct dihe­ dral (3°). Cut locator dowels to length, slide them through the center section ribs, and against the first wing rib. By rotating the dowels while applying pressure against the rib, you will make a mark for the hole.Cut out the hole, and repeat this process until the dowels are in the proper location and all assemblies are lined up, then glue in place. Do the other wing panel in the same manner. Make sure nothing slips out of line. The top sheeting can now be added to the wing panels, but do not sheet the top of the center section yet. The bottom wing is built up in the same manner as the top, in three sec­ Close-up of engine mount. Needle valve extension on left is bike brake cable with Enya needle tions. Do not sheet the top of any of the knob silver soldered to end. Nice way to adjust thrust alignment. assemblies until they are joined together with the ply dihedral braces. Make sure TAIL GROUP you are going to cover the various the holes in the ribs covered by the All simple construction here. Note the components. I used Hobby Lobby sheeting are large enough to allow the dowel inserts for attaching the brace Supercote throughout, simply because it servo extension leads to be pulled wires, and the stiffening dowels through was inexpensive and came in brown and through, or better yet, install the servo the vertical fin. yellow, approximating the colors of the leads before sheeting the top of the ASSEMBLY AND COVERING real th ing . The fu ll-size plane uses wing. At this point, you should decide how Continued on page 107

Hardwood inserts provide strong base for brace wire fittings. Opera­ Close-up of spray tank fill hatch. Floyd is still experimenting with ting turnbuckles provide realism and fine adjustment. spray system to improve results.

DECEMBER 1978 21 A pair of Hawks, with MRC 775 transmitter. Model on the right is stock; one on the left is customized as per the text. Customized version looks more individualized and also makes the model last a little longer. pass; OR, you can help him select an RTF trainer in which you can install the radio PRODUCTS IN USE in one evening and have him out at the field the next Sunday for his first session of "hold your nose up!” Because when MRC's "TRAINER HAWK", b y ELOY MAREZ p h o t o s b y a u t h o r all the talking and hangar flying is over, out at the field is where it’s at. • On any given weekend, at any active member that oft offered advice: "Candy Or, suppose you have an engine to R/C flying field, you will probably run is dandy, but liquor is quicker!" (Don't break in, or a new radio to test. And how into some of every class of model flier. By forget the experienced builder/flier about that repaired radio that just came class, we don't mean short, medium, tall, who suddenly . . . by crash . .. needs an back from the service center after or whatever standard you use to judge airplane, ready to fly, by the coming having gone into the ground doing a people, we mean the designer/builder/ weekend, wen) hundred plusity-plus miles per hour? flier; the plan-builder/flier; the kit- And the liquor in the R/C hobby has Wouldn’t you feel better about testing builder/flier, etc. And finally, way down got to be ready-to-flys. So let us take a or flying any of these things in a fairly at the bottom of this airborne pecking more objective look at them in general, inexpensive airplane? Inexpensive in order, the buyer/flier with his airplanes and at one, the MRC all-foam, almost- dollars, and maybe even more impor­ that someone else built,or that are sold as ready-to-fly "Trainer Hawk” three- tant, inexpensive in that precious com­ Almost-Ready-To-Fly, Ready-To-Fly, or channel airplane in particular. modity, building time. variations in between. Let us assume that some nice young There are also the guys who just don’t Even without realizing it, many of us man .. . uhh, person, comes to you and have time to build, being too involved in look down our noses at these guys with expresses an interest in R/C flying. The the other mundane things of which life their Plastic Toads, Rubber Ducks, or person has the money, time, and am­ is made, such as making a living. The few Dixie Cups, as the all-foam molded bition, which is probably all it takes. hours that can be spared for relaxation airplanes have come to be known. May­ Being a builder/flier yourself, you or a hobby have to be spent carefully, be some of this is justified, as to those of naturally recommend he hurry down to and would you rather see these persons us who are builders, a large part of the Pop’s Hobby Shop, purchase a Falcon 56 flying an RTF, or watching the one-eyed satisfaction of the hobby is the thrill of and a container of glue, and clear off the monster? seeing something we created roll down dining room table. Now, during the True, RTF’s are an excuse to some .. . the runway and do just exactly what it months that it’ll take this airplane to be the "I don’t know how to build” guys, was intended to do. But when it comes completed, you can do one of three which is a reason I can’t accept, as none to getting flying time, which is the things. You can teach him to fly on of us were born knowing how to build primary objective for many of those guys YOUR airplane (Who, me?); you can model airplanes. It is a skill and knowl­ at the field, it’ll probably help us under­ wait for him to finish his, during which edge that we acquired, just like we stand them and their ARF’s if we re­ time the flying season will probably acquired whatever else we know or are

Everything in this photo is furnished . . . Enya .15, muffler, glow Installation of Novak Electronics' Bantam Midget servos on a piece plug, spinner, and Top Flite 8 x 6 prop. of 1/8 Lite Ply.

22 MODEL BUILDER capable of doing. There is no excuse for these guys, but there may be a real good one for the rest of the RTF fliers, so give them a chance. Model Rectifier Corporation’s entry into this field is its 48-inch wingspan, Enya ,15-powered “ Trainer H aw k” , designed primarily for training pur­ poses, but equally useful as a test bed and for sport flying. It uses a two or three-channel radio, on rudder/nose wheel.elevator,and/or throttle, if desired. It has molded cavities into which all the MRC R/C com­ ponents fit perfectly, though of course, any other system can be installed with only slight modifications to the foam. The pre-bent pushrods are also of the right length to fit the MRC servos; either the MR-10, -30, -40, -70, or the ball­ bearing coreless motor -80's can be used. The Cessna-looking Trainer Hawk is Installation of MRC 775 airborne system. Everything fits into specially molded cavities . .. precision molded from high-density makes installation a cinch. Only slight modifications required to get other radios to fit. foam, in light blue for the fuselage and , and contrasting light yel­ low for the one-piece wing. It is fur­ nished with engine installed, pushrods in place, fuel tank and lines installed, and all controls hinged. Other than radio installation, the only things that need be done are gluing in the hori­ zontal stab, gluing in the main landing gear, and gluing in the rear wing hold­ down dowel. Now, what could be easier than that? On one of the two Hawks we tested, the person doing the control hinging got a little overzealous with the epoxy, and the excess built up between the surfaces enough to restrict movement. The excess is easily removed with a sharp Fiberglass cloth and 5-minute epoxy reinforcement on wing center section keeps rubber bands blade, being careful not to scratch the from digging into the wing. Procedure is fully described in text. hinge itself. They are of the one-piece flexible type which will probably outlast the airplane, but which often part if marked with a sharp pointed object. All necessary clevises, wheels, collars, etc. are included. The following list of tools and supplies are recommended by MRC for completion of the project: Needlenose pliers Phillips head screwdriver Regular screwdriver Modeler’s knife Prop and plug wrench Econokote-covered horizontal stab for customized model. Stab is covered only up to the fuse­ Prop reamer lage line, to provide a foam-to-foam contact when the stab is glued to the fuselage. Servo tape Fuel (Approximately 10% nitro) Fuel pump or bulb “ Chicken Stick” or electric starter Glow plug battery and clip Extra rubber bands (No. 64) A pencil Safety glasses To that list, add a 10-mm metric wrench, which is needed for the Enya prop nut. The otherwise handy-dandy Fox four-way wrench, being made for U.S. nuts, will not fit. And if you use pilers. you are fired, as MY student! A most comprehensive instruction booklet is included, written specifically for the beginner who is still learning the language. It includes an illustrated Landing gear comes pre-bent and already laminated between plywood formers; all the builder has to do is epoxy the landing gear assembly to the fuselage. What would be easier? Continued on page 120 DECEMBER 1978 23 two-hour layover before a connecting flight to Manchester could be arranged. It took 1-1/2 hours to get through a passport line, due to a jam-up caused by the French air controllers’ slow-down. After quickly collecting the lugguge and the model, we caused a minor sensation by literally running almost a mile in underground subways to reach terminal 1 from 3, pushing a cart with the huge red. white, and blue box perched precariously thereon. A wonderful porter helped me wrestle it into an elevator and up to the baggage check-in. There the girl said, "Run, the flight is almost loaded!” She instructed me to leave the box and they would send it on. I realized it probably would never make the flight we were on, but many flights go into Manchester from London, so it posed no problem. So much for theory. We found out in Manchester that the box would not fit in the baggage area of a Trident, used by British Airways. "N o problem ,” the baggage man said, "they will send it up tonight by truck and you can pick it up in the morning.” Another theory! As we waited around the terminal the next morning for baggage to get a line to Heathrow to find out where it was, we Mick Reeves won the R/C Scale World Championships with this outstanding Fournier RF-4 retired to the lounge to await the arrival motorglider. Large model is powered by an HP.61 and is rock-steady in flight. of Steve Sauger, our teammate. Munching a pastry and watching the airport activity was interrupted by my oldest daughter, Anne's cry, "Look!” There, reposing majestically on its own little airport cart and pulled regally across the apron by a tractor, was the Hiperbipe box. Very shortly after, it was tied to the roof rack of our rental Audi and on its way to Liverpool. Steve, By BOB UNDERWOOD PHOTOS BY AUTHOR incidentally, was not on the. flight. He came in several flights later. LOOK RIGHT-THINK LEFT joined Bob Wischer’s model and a Our lodgings at the university were frustrated British Airways staff. The most satisfactory, with each person • Liverpool and the gathering of the Hiperbipe's “ hangar” was a sturdy box having a separate room in small suites of international scale community seemed measuring 63 x 55 x 18 inches, and two. The staff at the university was most such a long time away at Riverside in weighed 100 lbs. Bob and I watched as it friendly and helpful. 1977, but time has a way of creeping on was angled about several different ways The first morning we were treated to cat’s paws, only to spring from the bush before being stuffed into the tail cargo an English breakfast: juice or cereal, to catch you unaware. area of our 747. fried eggs, bacon or ham, sausage, Such an occurance happened in my The trip to London's Heathrow Air­ tomato section, toast, orange marma­ case this year, and frantic weeks of work port was uneventful, but at that point lade, coffee or tea. After about three dominated the days following school in the well known "all you-know-what” mornings of this, the girls of the Under­ June and July. Painting and building, broke loose. The Underwoods had a wood clan wondered when it would redoing and pondering. The trim flight on July 3rd, with no canopy or windows or cockpit details, convinced me that the Hiperbipe would fly. Then came more 16-hour days doing the little details ... instruments, handles ... a myriad of items finally fused into a hopefully competitive model. A monster of a box was made, scale presentation developed, and packing commenced. For the uninitiated, this is a time-consuming, complicated job, due to the fragile nature of the beast. A ding in a pattern plane does not result in lost points, but "hangar rash” in a scale model is often looked upon with a scratch of the chin and a "H m m m !” The boxed eagle was taken by trailer to G. Britain's Brian Taylor entered this P-61 Black Widow, powered by two .29's. Model consis­ Chicago’s O'Hare Airport, where it tently put in the highest flight scores, but a low static score bumped it down to 8th place. 24 MODEL BUILDER Bob and Dolly Wischer fire up Bob's Piel Beryl CP 750 under the Englishman Terry Melleney's D.H. Moth Minor has been around for watchful eye of a contest official. Placed 7th. quite a few years, placed 5th at WC. Strange wheels! change. It never did. For 23 days, neither rain nor shine, hotel or bed or breakfast, could affect a change in that English standard. If the chickens of Britian ever go on strike, the Empire will fall! Having arrived on Tuesday with the Wischers, and Steve Sauger arriving on Wednesday, made the R/C team com­ plete. The control-line team of Dan Osdoba, Roland Baltes, and Ray Smith was on hand as well, and with George Buso and his wife, Olive, the U.S. Scale team was complete. The days before the competition was to officially begin were filled with unpacking the models and getting used to the surroundings. The team held a meeting one evening that proved to be most valuable. We Sparmann P1 (foreground) by E. Stromquist. and SAAB BA (background) by J. Stromquist, went over everyone's scale presentation both of Sweden. Latter model was 7-1/2 oz. overweight, had severe flight problems. in detail and found points which could be improved in some. Panic set in when Our intrepid leader, Manager Buso, tempts of a 24-foot R/C "stand-way-off ” it was discovered that one team mem­ led the procession of cars. We got lost! scale Lancaster bomber and a 747 with a ber, whose initials are RLU, had com­ However, through sheer determination, span of about 15 ft. I must honestly state pletely messed up the scale ratio. I had the airbase was located and the models that the 747 flew very realistically and listed the ratio of the model to the three- removed from the boxes and set up on made a thrilling sight in the air. The tables provided in the hangar. view, instead of the model to the full- Lancaster seemed underpowered. size! Gadzooks, what a mistake. The None of the models had sustained Both of these models were flown next day, on a borrowed typewriter, damage, and clean-up was the order of using two men and two transmitters. The Olive Buso retyped the information the moment, with many interested system certainly appeared to work well, page while the Wischers helped im­ spectators huddled about. but I still harbor the fear that 24 feet of prove a couple of other presentations. The Canadian team had already col­ model would do a whale of a lot of The models, in a caravan of cars, left lected and others began to trickle in, damage to a crowd. Later in the week, for Woodvale. Others, who had made bringing about the renewing of old when I was told that the SMAE. the the almost-20-mile trip, had given us friendships and the making of new ones. British aeromodeling group, no longer driving times of from 30 minutes to "you On the day before the event officially carries insurance for its members, as can't get there from here." began, we were witness to flight at­ does our ΑΜΑ, I asked one of the

Bob Underwood readies his 2nd place Hiperbipe while Jay Gerber Very colorful Fairchild PT-19 by W. Reger, of West Germany. Model (left) shoots film for upcoming AMA movie. placed 12th overall.

DECEMBER 1978 25 Here's Bob Underwood himself, with the Loe- P. Muller's well-detailed curtiss P-6E Hawk is powered by an O.S. .60,placed 13th overall. Muller ning M8 he proxy-flew for Tom Stark. Unfor­ tunately, he was unable to make the required hails from Switzerland. 30-second flight needed to qualify, and had to settle for 9th place. organizers what would happen if some­ sales booths. You should have seen the thing went into the crowd. His answer pile of Profile Publications at one deal­ only time for two flights, and this was was, "It would be a pity.” An interesting er’s space! further complicated on Sunday by heavy approach. There were carnival rides, an antique rain. On Saturday the judging began, and car show, and thousands of spectators in One part of the demo included the competition in other areas began in spite of rather inclement weather both flying of sleek, delta-winged, jet- earnest. Unlike other earlier inter­ Saturday and Sunday. engined R/C models from the Nether­ national events, much more was going A considerable amount of time was lands. Their flight was spectacular and on in the area. There were scores of tents spent on demonstration flights and an noisy, with vertical rolls out of sight into and booths selling every imaginable invitational pattern competition on both the clouds. type of thing. A huge football field-sized days. Some of the Sport Scale compet­ While the multitudes persued the tent contained scores of model industry itors were concerned that this left them carnival and flying areas, the five scale judges moved through the models one- by-one. It was interesting to watch them work. Heavy rains on Saturday night had flooded the area of the hangar they had been using. Then, French television film crews flooded their new area with light and directions as they shot a docu­ mentary. Add to this a visit by the Lord Mayor and Mayoress of Sefton (Liver­ pool). One must marvel at the high level of concentration the judges were able to maintain. Sunday evening came and the static scores were history. Mick Reeves paced the field, with Steve Sauger second, Bob Wischer third, and my Hiperbipe in fifth. It appeared that the U.S. was in an excellent position to bring home the team trophy, at least. Competition on all levels began in earnest on Monday morning. Each country had a position and one member flew in each third of the round. A. Steinberger's crew assembles his beautifully-built 1912 Blackburn. He must have a fortune Steve Sauger was the first to go for the invested in turnbuckles! Steinberger was the highest-placing member of the W. German team. U.S., followed by Bob Wischer, with the Hiperbipe’s daddy wearing the No. 24 vest. That tended to be somewhat dis­ concerting at first, when one considers that there were only 23 contestants. I can’t imagine how Nos. 25 and 26 felt. The flying was spotty the first day, with some very nice flights and some "inter­ esting” ones. It became evident from the first that a twin, a Black Widow, entered by Britain's Brain Taylor, would have to be watched in spite of a low static score. The new system of flight scoring which awarded percentage bonuses for various aircraft made itself known. Since the Widow was a twin and has retracts, it garnered a 20% flight bonus. At the end of round one, Mick Reeves French film crew about to capture Canadian Bob Nelitz (foreground) and his Chipmunk on a held the number one spot, Taylor, film they are producing. Bob placed 4th overall. Continued on page 90

26 MODEL BUILDER in mind that when you yaw the airplane, behind the stab fixed. I don’t know for there is some airflow across the fuselage. sure that either will work, but I think In Fig. 1, " A ” represents the airflow they should, and neither would exhibit across the fuselage due to yaw. "B ” the crosswind problems of the anhedral represents the lift vector caused by the tail. Let me know if you try either anhedral, and "C" represents the lift method and how it works out. Now I’ll vector caused by the blanking of the stab have to answer those three letters and with rudder application. As you can see, sign off for this month. if the anhedral is adjusted so that "B” Dear Dave; equals “ C” , then the airplane will How about some tips on landing? It remain neutral in pitch when rudder is seems most guys have more trouble with applied. Now, everything is cool, right? that than anything else. Perhaps a series Wrong. This has now created an adverse of some kind dealing with landing roll when rudder is applied, due to the different types of planes. My own main lift vectors on opposite sides of the stab. difficulty at this time is not landing in This must be compensated for by a slight general (haven't smashed one lately), INSTRUCTOR increase in wing dihedral! If we ever get but hitting the runway consistently. Conducted by all this adjusted properly (and few Sometimes I do, sometimes I don’t. Is people ever do), then we should have a there a secret to it? DAVE BROWN perfect airplane, but now, what happens I noticed that your column deals 8534 Huddleston Dr. in a crosswind? It will not be any more mainly (so far) with pattern flying and Cincinnati, OH 45236 problem than with a "normal" straight pattern ships, but there are lots of other stab, but if it is a gusty crosswind, the types (scale, gliders, etc.) which require • Can you believe it? I actually received anhedral will cause the airplane to different techniques. How about some three whole letters this month. At this bounce around, not only in yaw as it columns on specific types of planes and rate. Fearless Leader will be able to print would normally do, but in pitch as well! the right ways to set up and fly them? this column in the classified section in a This is caused by vector "A ” in the Anyway, I think your column is a good few months. A couple months ago, a previous drawing becoming variable, idea. I know I have learned a few things! friend from Mexico asked me when I due to gusts creating a variable vector So keep up the good work, and may found time to answer all the inquiries. "B" without the balancing vector "C”. your thumbs be never dumb. Aerially He was sure surprised when I told him Ya can’t win!! Whether this cure for the Yours, )an C. Eugenides, Coral Springs, that I had not only answered all the downward pitch is worth the problems it FL. letters, but that every one had been used creates is a matter of discussion, but I Dear Jan: in the column and that over half the feel it improves the flying characteristics If you will look up the column in the cjuestions were made up by this writer! under most conditions, and is therefore May issue, it covers landings in some I'm beginning to think that our readers beneficial, but I haven’t yet given up on detail, but I’ll repeat most of the impor­ fit into one of only three categories: other ways to eliminate the downward tant points. First, the airspeed and they know all the answers, they can't pitch. One involves a simple adaptation attitude of the airplane is controlled by write, or they don’t care. If you don’t fit of the Du-Bro V-tail mixer to apply a the elevator, and the placement of the into one of these catagories, then drop little upelevator when rudder isapplied, landing is controlled primarily by the me a line. as in Fig. 2. use of throttle. The secret is to aim short The first subject this month will be the Another possible solution to this may and drag the airplane to the spot with anhedraled or drooped stab. be to either move the rudder way back the throttle. This will solve the problem I keep kidding Don Lowe that when so it w on’t interfere with the airflow over of landing properly lengthwise, but to he designed the Phoenix, he bent it at the stab, or to split the rudder into a top hit the runway crosswise will require the wrong end. The pros and cons of the and bottom half, leaving the section Continued on page 115 anhedral stab are still being argued among the experts, but one thing all agree on is that the anhedral alters more than just the looks of the airplane. The main reason for the addition of anhedral is to correct the tendency of most airplanes to pitch the nose down when rudder is applied. It seems that when the rudder is deflected right behind the stab, it acts as an air dam and effectively blanks out a portion of the stab. This decreases the negative lift of the stab, causing the nose of the airplane to pitch down. (Yes, the stab is creating negative lift in most cases; see Dave Thornburg’s “ Center of Pressure” article in October 78 Model Builder). If you look at the enclosed sketch, you will see why the anhedral tends to hold the nose up. Bear

DECEMBER 1978 27 PHOTOS BY AUTHOR 1/4 SC ALE SC 1/4 ALE iihd nsta eepto ipa.A ih ste ilCuty i uem agr Fyn Ld etuati otergto h hangar. the of right the un­ is to of restaurant couple a Lady plus models, Flying hangar. Museumflyable 20 Air out brought Country Hill Casual fun-fly is the right Country· At Hill at display. on line put were flight onesthat the biggies1/4-scaleon finished of lineup the of part Just • The big guys came to Hill Country. In Country. Hill to came guys big The • ie Wud o blee ht ut 20 just that believe you Would site? of ton aquarter nearly that believe you eeae ltofpriiat neet Aferteaaeet soe,sm redytss a b needed. be may tasks friendly some isover, amazement the r fte A interest. participant f o lot a generated models could accumulate that much much that accumulate could flying models California Northern the at bled would And came. they vans and Pintos n te rod amr wr barely were Palmers Arnold the and can’t have 'em scaring the bejeebersout bejeebersout the scaring 'em airplanes have they’re ascan’t like afield would perhaps far nor of, ascapable quarter-size range the flying couldn’t so model the site, to adjacent is course com­ are planes scale mammoth the sched­ was event Association Scale ter lard? assem­ and unloaded were models R/C the QSA’ers honored this recreation, recreation, this honored QSA’ers But know. ya the links, the on duffers the of tional facility in Morgan Hill. A golf golf A Hill. Morgan in facility recrea­ tional isa multi-purpose Country Hill privately-owned, thing, one For patible. Hill Morgan at models minus) or (plus quarter-scale for fly-in quarter-scale A . . . GROVES MONTY By uled to determine if the flying site and and site flying the if determine to uled 28 retirement; too much to carry around! carry to much too retirement; eyraitc.0pwrdPprCbb Hwr Oeud i o in Osegueda is now Howard by Cub Piper .60-powered realistic Very For the Hill Country Flyers, the Quar­ Flyers,the Country Hill the For to... Jim Love's Aeronca Sedan is his first 1/4-scaler. Short prop arc leads us to suspect he's using ausing he's suspect leadsusto arc prop Short 1/4-scaler. Sedanhisfirst is Aeronca Love's Jim .60-size engine with no speed reducer. Hey, Jim, where's the driver? the where's Jim, Hey, speed reducer. no with engine.60-size at MRA HILL MORGAN hsCnet oesFetwsoeo he insbogtb Ken by brought giants three of wasone Fleet Models Concept This Runestrand (he must drive a Greyhound bus!). Greyhound a drive must (he Runestrand OE BUILDER MODEL Bert Baker's scratch-built Piper Cherokee 235 uses a plywood frame Ray Baker's 35-pound Cessna 310 comes in with nosewheel twisted with balsa covering. Model is very easy to fly . and starboard engine out. Landed OK. aware of the behemoths at the far end of the fairway. Typical of the QSA approach to mod­ eling and flying, it was a non-contest. No pressure. No sweat. Just a gathering of like-minded individuals wanting to fly a little and talk a lot. Members from Sacramento, Los Angeles, and points in between came to swap technical ap­ proaches, building techniques, discuss powerplants, and compare notes. The QSA’s stand on safety is not only gratifying, it’s downright rewarding. Airworthiness and safety inspections are mandatory, and it pays off. After 200 flights over the weekend, no one went home with a pile of miscellaneous lumber. A couple of busted props, a few dings in the Monokote, and a scratched cowl or two was about the extent of any damage. As with any R/C scale gathering, the models varied in construction quality and fidelity to scale. Of the 20 at the fly- in, only three could be considered near Precision Scale quality. Only four were Bill Eich's 9-ft. Taylorcraft on landing approach. Model was built from a Vic's Custom Kit. Bill's Continued on page t03 expert nose-high side slips made for very realistic landings.

Most scale-1 ike model at the meet was this 28-lb. PT-19, designed Bob Seigelkoff put on an excellent aerobatic demonstration with his and built by Jim Follini and flown by Lee Taylor. 1/4-scale Little Toni, now being kitted by Bridi.

Very realistic Nosen Champ, by Paul Sims, making a touch-and-go. Calvin Pope's Gere Sport flew all weekend without mishap. Looks Pilot in the cockpit really makes the model look good. like the "p ilo t" is signalling for a left turn. DECEMBER 1978 29 The birthplace of the Quadra engine is this Trail Manufacturing Ltd. plant, located in Canada. This month's column is a step-by-step care and maintenance manual for the Quadra engine, including tips on how to get the most out of it. MAMMOTH M s w By RON SH ETTLER

• This month, we will delve into the care One of the most-asked questions is, repairing that “ old” engine to the and feeding of the Quadra engine. With “ I’ve found an old chainsaw with an forementioned, and I think you have over 3500 Quadras in the USA alone, and engine that looks like a Quadra. Can you your answer. many more throughout the world, some sell me the parts to convert it?’’ Let me The reason for this preamble is to help with considerable hours on them, others answer that in this way. The original someone who intends to convert an in the hands of curious tinkerers, some engine had no provision for an adequate engine for model use to avoid wasting a crashed, etc., it was decided to use engine mount. The castings were lot of time and money on an engine not Model Builder as the most logical means changed to include mounting lugs, and really suited to the job. Many thousands of consolidating possible questions and these are not machined on later models of research and engineering dollars answers before they get asked and I get which have this provision and are used were spent to give you the product you snowed under with correspondence. in a saw, etc. The crankshaft and bearing have now, and many more are being While I can't speak for manufacturers of retainers were also changed, as well as spent to improve it further. The Quadra other products, the reader will be able the bearing specs. The flywheel is modi­ engine as you know it is a factory to spot similarities in maintenance, ser­ fied and had to be retested by the produced item, the production of which vice, and operation, and apply the factory for our use. The Quadra engine can quickly be adjusted to suit any information here if he chooses. It also (for propeller applications) is built in a demand without affecting the ability to will provide some food for thought separate production run, from the produce its sister products simultane­ before converting brand X into an ground up, as an aircraft or marine ously. Sure, I produced the first proto­ airplane engine, both from the eco­ engine. An industrial engine is not taken type for our application, and these are nomic and practical standpoints, but off the line and remachined, with parts still running today; however, all units more importantly, the safety aspect and added to turn it into an aircraft or marine sold were engineered and built by one your responsibility to yourself and water-cooled engine. Add the cost of of the most respected names in the others when attempting it. The Quadra engine is an industrial engine. Its construction and design allow a great variety of uses (including ours). A pure chainsaw engine often has parts which make it difficult to tell where the engine stops and the chain starts. A requirement for full power loads for hours on end is not a factor. Chainsaws in a normal environment run only minutes at full power. It’s unlikely you will find a small saw engine that will do the job of an industrial engine in our use. The Quadra engine has powered over 280,000 chainsaws in 41 countries for customers who demand quality rather than low price. The result is a product which is appreciated by its Testing station at the TML plant. Quadra engines are almost continuously being run on one owners worldwide. test program or another.

30 MODEL BUILDER 4) A good grade of common screw­ driver. 5) A feeler gauge with 25, 15, and 10 thousandths feelers. 6) A 3/4-inch deep socket for spark plug removal. 7) Needlenose pliers for wrist pin circlip removal. 8) A plastic-headed hammer for fly­ wheel removal. 9) Petroleum jelly (Vaseline), Loctite (perferably No. 242 or equivalent), Dow Corning silicon seal (crankcase seal material), and a good grade of 2-cycle oil for pre-run lubrication. Depending on how long your engine was in use and how well it was looked after, you may also need these items: crankcase seals, carb mounting gaskets, and exhaust manifold and crankcase gaskets, if used. I must again stress that the only reason you should have to disassemble an Initial running and test station. All Quadra engines are run at the factory. Here, a worker engine is that it has inhaled some of your adjusts the high and low-speed needles. flying field at an angle not normally associated with taxiing, or an uncom­ Many model engines, such as Fox, are pleted flying maneuver, or you suspect also test run, so I’m quite disturbed that something has fallen inside, or the when I see someone advocate taking an engine is either damaged or worn to the engine apart before they run it (without point that it has to be repaired, or you’re finding out if it has already been run). In going to do an overhaul. many cases, irreparable damage is done For those who read the instructions by someone with good intentions, but only when all else fails, on a Quadra you with sufficient knowledge of the must first remove the mount and the product to ensure it’s done properly. ignition points before you can remove Let’s start with normal maintenance the crankcase from the block. Also, procedures .that don’t involve “ wear when you have discovered that the rod pattern” disturbance. Check mounting has loose roller bearings, you have to plate for cracks and security. If the lower find all 11 of them before you put it back mounting crankcase bolts are loose, together again. tighten all 4 diagonally and snugly. If the For the people who need further help, rear screws are loose, remove them and use the following sequence: put a drop of Loctite on, then tighten 1) Remove carb, muffler, mounting securely. The mounting plate on a plate, coil assembly, and spark plug. Quadra was purposely designed to be 2) Insert pin in back of flywheel to frangible, so that in the event of an lock against rotation and partially re­ accident, the plate will bend rather than move prop spool (right-hand thread). possibly destroy the crankcase, shaft, or Strike flywheel sharply on the side other expensive part of the engine. If opposite the magnets; this should you do replace or remove this plate, be A busy station on the Quadra assembly careful you don’t bump the crankshaft Continued on page 103 line. when you remove the two rear lower crankcase bolts. The engine’s crankshaft industry. It isn’t a converted anything. endplay adjustment is held by the The flywheel modifications, for exam­ position of the main roller bearings, and ple, were professionally engineered. Do these are held in place by the "pre-load” not under any circumstances modify any applied when the crankcase is tightened flywheel on anything. The flywheel to the block. Check the coil retaining mods on the Quadra have been burst- clip and mounting screws for security. tested to far greaterspeeds than possible They have been fastened in place with with wide open throttle and no load. Loctite, and if removed, should have Conversely, if you feel the flywheel Loctite (suggest No. 242) or equivalent sustained aamage in a crack-up. replace reapplied. it with a factory part. If you feel a total disassembly is One other item to keep in mind necessary, these are the minimum tools before you tear down any engine that and materials necessary to do the job at has been run: don't do so unless it is home: absolutely necessary. All engines will develop normal wear patterns and will 1) A pin or screwdriver which will fit not run their best until they have done into one of the tooling holes on the back so. If you take the engine apart un­ of the flywheel, and which is long necessarily, you disturb these, and new enough to enable the flywheel to be ones will have to be established while locked against rotation by trapping it the old running marks remain, thus between the lower crankcase bolts. reducing the performance and life of 2) A 1-inch box-end wrench orsocket the engine. All Quadra engines have for prop spool removal. been test run at the factory to ensure 3) A 5/16-inch or 8mm hex socket or Packing a batch of Quadras. that you receive a clean, usable product. box-end wrench. DECEMBER 1978 31 PHOTOS BY AUTHOR OE B AT‘S BO POWER the final heat of R/C Unlimited. R/C of heat final the Ron Erickson's Spirit, on the inside, prepares to pass Mark Chamberlain's Miss Technicolor in MissTechnicolor Chamberlain's pass Mark preparesto inside, the on Spirit, Erickson's Ron of portion northwest the a how in up wonder might group modelers Many • where in the world. Actually, the idea idea the Actually, world. the in where came Hazlewood Ricki Richard and and Stewart) (Herb Florida Thonotosassa, wen) ies”. The . Championship” World “ a it call Unlimiteds, classes (R/C three only for o ti rc cn rc is ot ak to back roots its trace can race this for Cali­ some­ are places Needles, those both called and place fornia, a from up Ser­ World " baseball's at racing. Look world worry. the people over have all didn’t from we known, be truth it race and . boat . . model a host Unlimiteds can the nation this especially boats, real like look that boats model R/C for world the Deep Vee, and Outboard Tunnel) and and Tunnel) Outboard and Vee, Deep in race best the be to was race this fame, carburetor of Perry, John by Sponsored . . . DUNLAP JERRY By entered. 32 Lineup of boats for the largest R/C Unlimited race ever held. A total of 35 Unlimiteds were Unlimiteds 35 of total A held. raceever Unlimited R/C largest the for boats of Lineup But we did have a couple from from have a did couple But we Nt to (Not

son, Gary Jensen, Roger Newton, and and Newton, Roger Jensen, Gary son, what they felt would be the best race in race best the be together would put felt and they what offer Perry’s John of Erick­ Ron Dunlap, Jerry of comprised committee, steering afive-man and that was Unlimiteds ÍVC the just for race a Aeromotive, Perry of Perry, John when the world for a select group of model model of group select a boats. for world the advantage take to decided Ruggles, Les classes. it So other of couple a possibly Nevada, Reno, Natsat 1977NAMBA the boats that look like real boats. From the the From boats. real like look that boats Inc., expressed an interest in sponsoring sponsoring in interest an expressed Inc., beginning, the R/C Unlimited classwas Unlimited R/C the beginning, The overall idea was to hold a race for arace for hold wasto idea overall The size tunnel boats racing in the Outboard Outboard the in racing boats tunnel size epve ae ot etil a recog­ a certainly most are the because deep-vees added then was class Vee contest. the of event featured the be to world. So, maybe the title “ World R/C R/C World “ title the maybe So, world. ever boats the in classes of these anywhere in number entered largest the drew classes, R/C the of two out, turned later full- with ties Tun­ close had it class, since nel Outboard .21 the added was Next nizable class in full-scale racing. As it it As racing. full-scale in class nizable Deep- The (OPC). Class Performance ants with an opportunity to get in some some in get to opportunity an with ants August Thursday, on activities racing of otn Caposis ws’ sc aall. such after wasn’t misnomer Championships” Boating Tunnel, Outboard .21 and Unlimited at as rud h rcr NMA 5- NAMBA were times day’s The top course. record oval lap the contest­ around laps the fast provided period and tune-up tuning for aside set was day a 3, running fo r fast times. W ednesday’s ednesday’s W times. fast r fo running start actual the to Prior activities. racing with his Wild Won. hisWild with Jay Selby won Best of Scale in .21 Outboard Outboard .21 Scale in Bestof won Selby Jay C Each event was allotted a full day of of day full a allotted was event Each onshi s ip h s n io p m a h certainly was! certainly OE BUILDER MODEL Bill Horned prepares to launch his Thriftway Too, winner of the Ed Fisher won the Outboard Tunnel class with his original design. R/C Unlimited final. Two K&B 6.5 cc's. Boat looks to be of very simple construction.

Herb Stewart, of Thonotosassa, Florida, had engine problems with the K&B .40 in his Michelob Light, was 4th fastest qualifier in Deep Vee,

a 33.3 timing. Ward, designer and builder of the Ward- The Deep-Vee class led off the sched­ craft Formula V, using an OPS .60 for ule of racing events on Thursday with 19 power. Ron Erickson guided his OPS .40- boats (four .21's, eleven .40's, and four powered Formula V to fifth position. Ricki and Herb Stewart won Best of Scale in Deep Vee with their Michelob Light. ,60's) competing together as one class. John Perry was using his new Perry Vee The Deep-Vees ran four 5-lap heat races and a Rossi .61 front rotor with Perry turned in by a couple of model boaters and three 10-minute enduros to arrive at Pump and Carb. known for their quick boats. Ed Fisher, the eventual winners. Showing that his With the completion of the heat holder of more NAMBA records than quick time during the practice session racing, 17 boats were able to begin the any other NAMBA member, showed wasn’t any fluke, Ed Fisher won all four 10-minute enduro phase of the Cham­ that his new tunnel would be the boat to of his heat races to take top points in this pionships. The wind picked up slightly as beat, as he turned in a two-lap time of event. Points towards the Overall Cham­ the enduros began, and this added a 42.8 seconds to gain the award for fastest pionship were awarded in inverse order new dimension, since the boats couldn’t qualifier in the .21 Outboard Tunnel of finish. By winning the heat racing race at full throttle without experienc­ class. Ed also showed the Deep-Vee class section, Ed picked up 19 points. John ing handling problems. It would seem the quickest way around the buoys Perry, after getting off to a shaky start by hard to believe that after 30 minutes of by posting a 35.6-seconds clocking for jumping the starting clock, placed enduro racing, there should be a tie for two laps with his Wardcraft Formula V second in the heat racing, besting the top position. But there it was, with and K&B 6.5. In the R/C Unlimited Merrily Hornell on the basis of a faster both Ed and Ron showing 73-1/2 laps. division, Ron Erickson used a new OPS heat timing. Merrily piloted her Dumas Based on running a 1/4 lap more in his .65 in his Spirit of Dayton Walther to turn CF 40 to third and was followed by Frank best enduro. Ed was awarded first posi-

John Perry (left) prepares to start the engine in Bill Bennett's Deep Coming in after winning the first Unlimited consolation race is Gary Vee. Bill placed 6th in Deep Vee finals. Jensen's Pride of Pay 'n Pak outrigger. OPS .60 engine.

DECEMBER 1978 33 tion, bumping Ron to second. John Perry followed with 59-1/2 for third. Placing fourth was Bill Bennett, owner of the Circus Circus Hotel in Las Vegas and sponsor of the Las Vegas Tournament of Championships for R/C aircraft. Bill was running a Perry Vee with a Rossi .61 set up like John Perry’s. Merrily Hornell kept the feminist movement alive with her fifth place finish. Based on winning both events, Ed Fisher was the winner of the Deep-Vee Championships with 36 points. John Perry’s second and third Three unidentified tunnels racing together through the right turn. Absence of wind, main place finishes garnered him second bugaboo of tunnel hulls, madefor dead calm water. overall with 33 points. A close third with 31 points was Ron Erickson, closely followed by Merrily in fourth overall with 30. Frank Ward and Bill Bennett rounded out the top six positions. The .21 Outboard Tunnel class took to the water on Friday, with 37 entries ready for three 5-lap heat races and three 5-minute enduros. Water condi­ tions remained ideal for the tunnels throughout the entire day’s racing program. With little or no wind, blow- overs, the nemesis of tunnel boats were a welcome absence. The tunnel racing action was very close in both the heat racing and enduros. There was a three- way tie for first place in the heat racing Hey! Get that tub outta there! Deep Vee action during the 10-minute enduros shows Herb Ste­ portion of the tunnel schedule. Based wart retrieving a boat while two other Vees zip past. on having the fastest heat time, Ed outboard tunnel racing, barely holding minutes of enduro racing action. Ed Fisher, racing his original tunnel design, off Ed Fisher after Ed jumped the starting Fisher chose to play it safe and was able took first place points. John Moss, a first- clock and came within inches of lapping to parlay excellent speed and reliability year model boater, placed second with the rest of the field. With Ed now having for another first place finish with 33-1/2 his modified Midwest Klampon-Kai. two firsts and a second. Curt Weston laps. Vic Drew, who turned the most laps Third place was awarded to Vic Drew, found himself with two firsts and the in a single enduro with 11-3/4 laps,came manufacturer of the Excaliber II tunnel chance to win it all in the heat racing. in second with a 32-1/2 lap count. Buzz outboard. Curt Weston, using another Unfortunately for Curt, he also jumped Passarino, racing an original tunnel Excaliber II. was able to place fourth. the start of his final heat and dropped design, ran 32 laps for a third place John Havens, Jr., racing a wooden from first to fourth. finish. Both Dennis Caines, using a version of the Excaliber II, was the fifth Although the final results of the wooden Excaliber II, and Jack Garcia, place finisher in the heat racing. enduro racing weren't quite as close as driving a Spickler Rascal tunnel, had One of the most exciting races of the the heat racing, only 2-1/2 laps separated identical counts of 31 laps. However, day found Jay Selby, a pioneer in model the first and fifth place boats after 15 Dennis was awarded fourth, based on a

Merrily Hornell drove her Dumas CF 40 to 4th place in Deep Vee, Fastest qualifier and winner of Deep Vee was Ed Fisher, driving using a K&B 6.5ccand Kraft radio. this Wardcraft Deep Vee with K&B 6.5cc engine. 34 MODEL BUILDER Morrie Lemke's Valu Mart gets loose down the front straightaway Jack Garcia drove his Spickler Rascal to 5th place in Outboard while Bill Homell's Thriftway Too runs on the inside. Tunnel, using Futaba radio and K&B outboard.

Talk about realism! Roger Newton's Miss Budweiser was 5th in the Frank Melewski piloted his checkerboard Bardahl to third place in R/C Unlimited finals. Uses OPS .60 and Futaba radio. the first R/C Unlimited consolation race. higher lap count for one 5-minute was done prior to the racing of the R/C down and yelling, ‘‘Bee, bee!” The enduro. That placed Jack in fifth Unlimiteds on Saturday, and Buzz bested Pottols are definitely considering ob­ position. Curt in a 5-lap heat race for third place,. taining different colored racing shirts, Since Ed Fisher had once again won Following Curt’s fourth place finish in since they have had similar troubles with two firsts, he easily took the Overall the overall standings, were Jack Garcia the bees buzzing around their yellow Championship. Vic Drew's second and in fifth and John Moss in sixth. Pat Pottol shirts. third place finishes totaled up for a experienced a few exciting moments The 35 R/C Unlimited models entered second place in the final standings. Buzz during one of the outboard races when a in Saturday's races marked the largest Passarino and Curt Weston ended up in bee lighted on her right hand and gathering ever held for these beautiful a tie for third place. After some discus­ decided to try out its stinger. It took a mini-thunderboats. A good frequency sion. it was decided to race the two few moments for husband Charlie to modelers off for the third place slot. This understand why Pat was hopping up and Continued on page 118

R/C Unlimited winners (I to r): R. Newton, 5th; M. Chamberlain, Race Sponsor, John Perry (left), and .21 Outboard Tunnel sponsor, 6th; L. Ruggles, 4th; W. Osborne, 3rd; R. Erickson, 2nd; W. John Brodbeck, were presented with special T-shirts at the Awards Hornell, 1st. Banq uet.

Deep Vee winners (I to r): E. Fisher. 1st; R. Erickson, 3rd; W. Ben­ Outboard Tunnel winners (I to r): E. Fisher, 1st; V. Drew, 2nd; D. nett, 6th; J. Perry. 2nd; M. Hornell, 4th; F. Ward, 6th; T. Feist, Top Caines accepting 4th for C. Weston; J. Garcia, 5th; B. Passarion, 3rd; .21 Vee. J. Moss, 6th. DECEMBER 1978 35 HAMILTON STAND*A 0 ADJUSTABLE M»0* - · '

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D ata S o u r c e s-. A l l pro d u c tio n d raw in gs of st ea rm a n a ir cr a ft m o o- e l s U» TO th e PT-IS WERE LOST IN A FLOOD· T N I· S IT OP DRAWINGS CAUTION WAS MADE USING A FRONT 4 SlOE VIEW FROM A BOCINO/ViCnITA REPORT. OF STANDARD OL AIM AIRCRAFT YEARBOOK J · VIEW. DETAILED MEASUREMENTS OF AIM CF-AMB IN THE NATIONAL MUSEUM 0» SCIENCE 4 TECHNOLOGY OTTAWA. CAN., Bl A.J. SHORTY, MEASUREMENTS 4 PHOTOS RT JACK VANOERVIER, SCHENECTADY, NT.. Pl u s man-· boeino ph o to s furw Sh ed rt walt h o u se, w ic h ita . ran

P eter WesTBupo STEARMAN 4E PHOTOS FROM BOEING/WICHITA

This Stearman 4CM was the first of 12 sold to American Airways, forerunner of American Airlines. The planes were used to shuttle mail on American's routes. Note that the exhaust collector ring forms the leading edge of the NACA cowl, a distinguishing feature of 4C models. STEARMAN 4E . n These are probably the only accurate drawings ever published of this beautiful biplane. The original factory drawings were destroyed in a floodIThese are from first-hand measurements, photos, and technical reports.

• The prolific genius of Lloyd Stearman The Model 4 Stearman came in three Stearman M-2, a much larger mail was never more apparent than in the slightly different versions, all alike carrier; the 4D and 4E were also called design of his Model 4, an airplane he except for their powerplants. Actually, Juniors. The front cockpit furnishings lovingly called "the finest airplane I ever six different Approved Type Certificates and coaming with windshield attached built". It is a tribute to the quality of his were issued for the series, but three could be replaced with a hinged cover, designs that long after the Boeing were for the mailplane configuration. making a mail compartment out of the Airplane Co. took over the Stearman The 4C had a 300-hp W righ t J-6, 9- roomy front cockpit. Thus converted, Aircraft Co., his aircraft were (and are cylinder radial, as did the 4CM mail- the airplane became a “ Senior Speed- still) called “ Stearmans” . Stearman plane. The 4D and 4DM were pulled mail'’. This was the only difference became a part of United Aircraft and along by 300-hp P&W Wasp Jrs., and the between the two models. Occasionally, Transport in 1929; part of that company 4E and 4EM were powered by the big one will find a photo of a Bull Stearman became United Airlines, the rest being P&W Wasp Sr. of 420 to 450 hp. with “ Junior Speedmail” on the rudder, absorbed by the Boeing Co. in 1931. Some confusion exists about Junior but with a mail compartment. Neverthe­ Stearman became the Stearman Air­ and Senior Speedmails, as the various less, the airplane is a true Senior Speed- plane Division and later, the Wichita, airplanes were called. The first Junior mail. Kansas, division of Boeing. Speedmail 4C was the successor to the

Stearman s/n 4011. shown above, was originally a 4D powered by a 300 hp P&W Wasp Jr., as shown here. The aircraft was later converted to a 4DM by covering the front cockpit; it was used to haul express and mail. Stearman plant is in the background.

DECEMBER 1978 37 Handbook photo of Stanavo 4E shows excellent detail of suitcase Excellent detail is visible in this close-up of the nose of the Stearman cowl fasteners and numerous twist fasteners. 4DM, powered by 300 hp P&W Wasp Jr.

The caption on this Boeing photo states that the airplane is a 4E, but the engine is a P&W Wasp Jr., making it a 4D. The airplane was originally a Stearman test article before being sold to Canadian Airways, where it was converted to a 4EM.

The third of three 4E's delivered to Standard Oil of California has had the forward cockpit converted to a mail pit, making it a 4EM. The words "Junior Speed mail" are painted on the rudder; however, when converted to a mail plane, the planes were called "Senior Speed mails".

38 DECEMBER 1978 PHOTOS BYPHOTOS AUTHOR

Unlimited Open winner and NSS National Champion, Jim Fitch, has Leon Kincaid flew his Free Spirit to 1st place in Standard Open, his landing measured by Lou Faerman prior to last round. Site is the LARKS field at Carlyss, LA.

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By KEN CASHION . . . The author, a contestant at the Glider Nats, describes what has to be one of the most relaxed, well-organized, and fun-filled competitions to take place at the Lake Charles 1978 AMA Nationals.

• What a rare contest . . . a contest in assume that at most contests, the ap­ Consider. . . a timer always ready for the which the entrants included the World parent ability of the contest manage­ flier at the winch . . . not looking for a Champion, three different Mexican ment decreases as competition intensity frequency clip ... an on-the-field com­ Champions, and the elite of the soaring increases: not so in this one. puter giving printouts of scores and community. The contest director and his The contest director, Bert Striegler, of standings ... a well-equipped hobby support team easily matched the com­ Houston, had 24 non-flying helpers shop on the field . . . good food cooked petence of the 76 fliers. This team of from his Houston Radio Control Club on the field . . . covered work areas with workers received as much praise as the (HRCC) and three from the Manned tables . . . immediate access to cars .. . fliers. To listen to fliers talk, one would Spacecraft Center Club in Houston. contest site 10 minutes from motel ... on-the-field charging of winch batteries from powerlines, not gasoline engines ... an HRCC-provided MD and RN (Dr. Chip Friday and wife) on the field with full medical supplies ... a scorer, Donna Scheider, who was friendly, all day, every day, . .. and as it came to pass, perfect weather. The sailplane competition took place at the Lake Area Radio Kontrol Society (LARKS) field at Carlyss, Louisiana. This was seven miles south of Sulphur, where the sailplane headquarters were located. The mornings did have very high humidity, and one flier had to resort to Bill Haga's Legionaire making one of its usual high-point landings. Bill placed 3rd in Unlimited "drying o u t’’ his sailplane under the Open, received the Texas/Florida Challenge Plaque for being the highest scoring Texan. hood of his little car each morning

Dave Cook, about to launch his Aquila XL for an official in Unlim- Some of the many sailplanes at the Nats. Note the shaded tables and ited Open. Dave placed 8th out of 35 fliers. air-conditioned LARKS field house .. . really high-class!

MODEL BUILDER 39 No, this is not how one flier brought his model to the field each morning . .. see text to find out what's goin' on. before some of the wood parts would groups of fliers. operate properly. But there were no This processing business should have problems with mosquitoes, alligators, or been arranged differently, but sail- snakes. The LARKS did not allow them planers made the best of it and used the on their field. time to renew old acquaintances and The soaring activity actually started make new ones. Owen Morris and wife Bill Haga, of the 20-man Texas team, concen­ Tuesday evening in a long line in an and Co-CD Bob Scheider and wife trates hard while flying his Legionaire. ultra-hot gym at Chennault Field, where good-naturedly performed the neces­ transmitter and sailplane processing sary processing tasks. took place. The first time through the The Florida/Texas rivalry was re­ line, a flier needed his FCC license, AMA kindled when fliers from these states entry form, and transmitters. The next found themselves intermixed in the time through was with sailplanes. Imag­ processing line. This wholesome and fun ine 76 fliers, often carrying two sail­ competition from the past has resulted planes . . . some assembled, some not in a special, non-AMA plaque which is . . . and all of this in a slow-moving line. awarded to the winning state. On Wednesday morning at 8:15, with There was more chance of damaging a cheers and applause, the first launch of plane in the line than on the field. At the contest was made. The first round least, going through the line twice was over well before noon. Two more permitted one to visit with different rounds were flown that day with the flight order reversed for each. Each day, each flier used a different winch and landing circle (three winches ... three circles). The task was 7-minute duration on 300- meter line from 6-volt, 4-inch reels. Maximum landing bonus was 100 points, with a loss of four points per foot from center. At the end of the first day’s com­ petition, Texas’ Tom Williams had 1498 points; Jim Fitch, 1490; Dave Cook, 1448; Clark Fitch, 1444; Stan Pfost, 1410; Bill Haga, 1396; John Rimmer, 1394; and Phil Harris, 1388. The first place flier had 95.5% of a perfect score, but was only 8 points ahead of second place! Such was Cecil Haga accepts Challenge award from Stan the fine flying throughout the contest. Youngest flier was Jorge Guzman, 9, Mexico Pfost. Bert Striegler gives his approval. The Northwest Soaring Society City, here being coached by father, Roberto.

Ron Feiler, with the aid of his very pretty helper, does a little On the last day of the meet, all the Texas fliers showed up with Texas modifying to his JASCO Floater 110. flags on their antennas. What class!

40 DECEMBER 1978 Jim Fitch receives the NSStrophy from NSS President Stan Pfost. first day, there was cooling off and guitar playing around the motel pool, while the winners plotted strategy and the Clark Lydick flew an Aquila to 3rd place in losers made up excuses. Standard Open. On Thursday, there were three more transmitter from the impound area, rounds with no individual dominating bring his sailplane to his assigned winch, John Rimmer, designer of the Calisto, placed the competition; one could anticipate and wait his turn to fly. At the winch he third in Modified Standard Open. the general list of the top five, though would receive the frequency clip from not the order. The pea patch down­ his timer and the timer would remove (NWSS). in the form of Frank Girolani, wind of the landing circles arrested the the tape from his transmitter switch. provided a computer for the processing landings of a few more sailplanes,· but, After the flight, the timer would confirm of scoring data. Each score was punched like the day before, only very minor that the transmitter was off, replace the into the computer with the flier’s name damage was suffered by any aircraft. tape, and remove the frequency clip. for storage and compilation. The im­ The contest structure, while appearing The pilot would then turn in his trans­ mediate hard copy printout listed, in overly organized on paper, worked out mitter. There were no yells of “ GLITCH!” order of overall position, the flier’s very well. The flier would receive his Continued on page 105 name, ID number, score, and percent of perfect score. Another listing showed the class-by-class placing with names, scores, and score percentages. This program was developed by M ike Free­ man with assistance from Girolani, and is available to other clubs. Besides the 14 states, including Alaska, represented, there were eight fliers from Mexico. Raul Lopez and Alejandro Huerta, both from Puebla, are National co-Champions of Mexico. The youngest flier in the contest was Jorge Guzman from Mexico City, who at nine, has been known to beat his father/coach, Rober­ to. The visitors from south of the border made a good showing for themselves. Scott Simmons' Mirage about to bore a hole in the sod. Model was originally designed by Blaine After the heated competition of the Rawdon.

Frank Girolani operated scoring computer throughout the meet. Contest Director Bert Striegler and Scorer Donna Scheider during Printer at right provides hard copies. one of their few breaks. Both did a great job.

MODEL BUILDER 41 PHOTOS BY THE AUTHOR 97% of perfect to win . . . without spoilers! without . . . win to perfect 97%of First Place winner Steve Work, with his "Bird of Time". Steve flew Steveflew Time". of "Bird his with SteveWork, Placewinner First R/c • Ladies and Gentlemen, I give you the the you give I Gentlemen, and Ladies • f D a Fiz f escl, a just was Pensacola, of Fritz Rae CD of grass green site The rolling of wind. mile square awas little 80’s very the in with 90s, and floated Temperatures days. alter­ First points. 11,184.96 Grande” 11,309.3 points. 11,683.7 points. Time" eriel conditions? near-ideal Contest organization, under the control the control the in under deep organization, panhandle. Contest field western the of practice woods Navy piney a . . . Florida lovely long, three filling rounds, Labor over Florida, Pensacola, in place points. with11,035.6 Illinois, isnate JackHinerof lowest ntd tts orn Ta fr 1979: for Team States Soaring United ietest . . fantastic! .. . site the like six full a ran contest The weekend. Day By DAVE THORNBURG . . . The 1979 FAI R/C Soaring Team for the U.S. has to answer to no one! The The one! no to answer hasto U.S. the for Team Soaring R/C FAI 1979 The . . . THORNBURG DAVE By 42 original designs showed up this year than in years past. third spot on team. on spot third past.years in than year designsup this showed original "Texas" Tom Williams flew this original design to 14th place. More Current World Champion. Skip Miller, flew an Aquila Grande to Grande Aquila an flew Miller, Skip Champion. World Current More place. 14th to design original this flew Williams Tom "Texas" So what did it take to win, under these under win, to take it did Sowhat . kp ler Cooao " l ila u q "A olorado) (C r ille M Skip 3. For starters, let’s look at the scores. At scores. the at look let’s starters, For Finalstook Selection Team year’s This Viking" “ (California) Koplan Terry 2. of "Bird Mexico) (New Work Steve 1. a wsol 9.6 rm pret i hstuhs f l sprtrfnl. frthn report. first-hand A finals. separator all of toughest this in perfect, from 91.96% only was man SOARING cola, 81% w ould put you solidly in in solidly you put ould w 81% Pensa­ cola, At perfect. 81% of approximately . .. 12,000 points a possible of 9714.3out Work flew 97.36% of perfect, with no no with round! perfect, of throw-away 97.36% flew Steve Work winner place first place; twentieth LeMon Denver, in Finals FAI 1976 the Payne of Dallas took first overall with with overall first took Dallas of Payne afford to "specialize” , or focus on just just on focus or , "specialize” to afford gn ta te he wnes ee all were winners three the that encour­ aging it Ifound a stand chance. didn’t to had you tasks; three the of two or one couldn't you experience, FAI my in time Maude. tougher, vns ipae ta fotdwl in well floated that airplanes . . multi-task FAI the events. for specifically oped a but duration, and distance at hilt. the good to three all fly to prepared be lig ipae ta hd en devel­ been had that airplanes simply flying run, speed the on slow very were ho little w pilots r /o d n a Planes m inim um -sink co nd itio ns, yet could could yet ns, runs. itio speed 13-second nd for co together hang -sink um inim m Scores were so close that, for the first first the for that, close so Scoreswere It look like de competition gettin’ gettin’ competition de like look It * tvjv i*. o4hi 96 A ias oe i o itd y Dave. by kitted isnow Model finals. FAI 1976 in 4th to Steve's Bird of Time was designed by Dave Thornburg, who flew it it flew who Thornburg, Dave was designedby Time of Bird Steve's ,Λ- ry ian, Terry Koplan, who flew a Craft-Air Viking. Craft-Air a flew who Koplan, Terry ian, Second member of the 1979 team isCaliforn­ team 1979 the of member Second >*,· OE BUILDER MODEL on the course. I could name you at least three first-rate pilots who fell from grace on the Pensacola distance course, not because their planes were inefficient (one of them recorded the fastest speed time of the contest) but simply because the air between imaginary planes A and B was sick, sick, sick for the entire eight minutes of their working time. But the scoreboard never tells the whole story about what it takes to win; and that, Dear Hearts, is why magazine editors need us lowly correspondents. I went down to Florida as an assistant to Steve Work and former team member Dale Nutter, so I got to watch the contest from the inside without having to suffer the pressures of competing in it. And I'm bloody glad I d/c/n't competein it,too. . . it was the toughest sailplane contest I’ve Bob Gerbin, of L.A., mutters over his Paragon. Two of Koplan's Vikings in background. ever attended. Most contests I've gone Chris Smith models her father Herb's Invader. to in the past, whether they were fifty- So I went down to Florida, and I kept Herb flew the model to 7th place. man or 250-man contests, had only my eyes open, and I learned a couple of about six or seven competitors; this one things about competition flying. If you I continue to maintain that minimum had at least a dozen, maybe more. By can sit still for another ten minutes, I’ll sink and maximumgoare the only viable competitor I mean a pilot who, at that share ’em with you. parameters of sailplane design: if you particular point in time, has the skill, the One of them has to do w ith the nave a winner in these two categories, yschic energy, the airplane, and the common belief that you need to fly a then all you’re measuring when you fly elp necessary to come out on top of the plane for a long time in order to become the distance event is the quality of the air heap. It’s a rare combination. thoroughly familiar with it, in order to fly it well. Turns out that this simply isn’t so. Steve Work completed his first Bird of Time in May, and flew it in only one or two contests before entering the FAI program. Number Two Bird came off the board just days before he left for Florida. On the first practice day in Pensacola, he pushed Number Two too hard in a speed run and blew it up. He then rebuilt the fuselage, mated it to the Number One wing, practiced with it for one day, and won the contest with it. Terry Koplan, who came in second overall, flew his first Viking for only a short time, entered the first L.A. quarter­ finals and blew it up on the speed run. qualified for Florida with his faithful Sailaire, and finished his second Viking just in time for the Finals. Skip M iller, current World Cham­ pion and the third team member, blew up his first Aquila Grande on a speed run this summer, and finished his second 1977 team member. Dale Nutter, waiting his turn to launch his Grand Espirit. Note the incre­ ship just in time for two days of practice dible expanse of grass . . . a perfect soaring site! with it before the Finals.

John Gunsallus placed 9th with his original design "Whispering "TUES" (Truitt's Ultimate Evolution for Soaring), by Jim Truitt, Hope". Model uses 10' Hobie Hawk wings, skinny fuselage. features a low aspect ratio, all-flying V-tail, and tiny spoilers.

DECEMBER 1978 43 Jack Hamilton flew his Legionaire to 8th place. Meesh Miller checks Dr. Walt Good looks over "Texas" Tom Williams original design. out the competition for Skip. Walt was just passing through, stopped by to chat.

Stories sound familiar? Maybe there’s a primary launch system and one or two feed him information about other ships a moral in there somewhere: introduce backup systems ready and waiting for flying in his group, about changing wind a first-rate pilot to a first-rate aircraft and him when his working time begins. conditions on the field, and sometimes it doesn’t take them long to get ac­ The third helper is the spotter. A pilot even about his own performance ("How quainted. (Or to exceed the Redline — needs a spotter he can trust standing many more circles you planning to make wen) next to him during the flight .. . some­ in that sinkhole, Bufo?” ). A good spotter A second thing I learned about com­ one with a quick eye and a calm voice to Continued on page 97 petition flying at the Pensacola Finals has to do with teamwork. FAI rules allow a pilot three helpers on the field when he flies. He needs all three. Two of them are merely grunts, guys willing and able to run their legs off to see that the pilot has

Skip Miller with his Aquila Grande. Skip flew Craig Foxgord of L.A. flew his venerable Albatross to 10th. Overall competition was tougher this 93% of perfect for 3rd place. year, partly because the air was a lot more stable than in Denver two years ago.

Terry Koplan digs for spare change to give to cameraman Dave Ray Hayes of Indiana with his original Osprey. Turned 13.6 seconds Thornburg. Terry finished his Viking just prior to the finals. in speed to tie Don Edberg for fast time. 44 DECEMBER 1978 PHOTOS BY AUTHOR

At the very top, familiar faces (I to r): Dave Brown 1st. Steve Helms Top NSRCA Novice, Lamar Gilbert, gets trophy from Joe Bridi. Non· 2nd, Mark Radcliff 3rd, Tony Bonetti 5th. Dean Koger 4th, missing. NSRCA member (at the time), Steve Cowee, was No. 1 Novice.

By SALLY BROWN ... A first-hand report of the 1978 Pattern Nationals, by someone who knows it w ell. . . Wife of the winner, Sec./Treas. of NSRCA, top reporter for the "K FACTOR", and a USPJA judge.

• Just a few hours before Dave and I left last visit to Lake Charles was in 1974 and I rant, golf course, school bus parking lot, for the Nationals, amid the hurrying, remember the base as being very des­ etc., already built on what was the air scurrying, packing, and "gosh darns", olate and run down . .. gave me the base, plus much active construction on the phone rang and our hard-working feeling we were the last flying "nuts” on other projects going on every day. The editor. Bill, explained that he couldn’t earth .. . but what a change in four place was alive and growing . . . the same make it to the Nats this year (for the first years. There are housing areas, a restau- impression was gained everywhere we time in many years), and did I think I went in Lake Charles. AMA head­ could handle the report? Did you ever quarters was actually two buildings ... know me to turn down a captive audi­ one the old gym where press head­ ence? Anyway, I obviously said yes, I quarters, scale cage, transmitter pro­ could handle the report, and if I begged, cessing, etc. were, and the other was an pleaded, and/or threatened to go on office-type building where all AMA strike in the middle of a flight, I could get officials could be found. Dave to take the pictures (with help Sunday was transmitter processing for from Ron VanPutte and Dick Penrod). pattern, and the troops really poured in, We started for Lake Charles in our with 63 Novice, 40 Advanced, 16 Expert, trusty motorhome (which turned out to and 40 Master flyers, for a grand total of be not so trusty .. . read on) and the 159 pattern fliers. There was some flying further south we went, the hotter and done and much meeting and greeting of more humid it became, and this Yankee friends, old and new,and much drinking began to have doubts about her sanity. of anything cold that was available. No We arrived at AMA headquarters on nerves today . .. but the fun begins Saturday, July 29, and were very pleas­ Both Mark Radcliff and his Phoenix are "fla ir­ antly surprised at our surroundings. My ing" for a landing!

Γ

Three judges await their next "victim " at the flight line (I to r): Al Tuttle. Joanne Meyers, and Long-time pattern campaigner Ron Chidgey Mike Montgomery. (6th) calls for Steve Helms (2nd).

MODEL BUILDER 45 Novice Champion, Steve Cowee, receives AMA trophy from NSRCA Don Weitz |8th Masters) preps his modified "Deception" as Joe Bridi President. Joe Bridi. (left) stands by to assist.

which made the rounds very even ... very little waiting for judge changing, etc. Monday's flying was delayed approxi­ mately 1-1/2 hours for a quick shower (monsoon?) but it began before anyone had gotten their airplanes out (we were on the site early for the pilots meeting, so it was really just an inconvenience, rather than a catastrophe). The shower over, the site was then set up while the pilots meeting was concluded and flying began. It was evidenced early that the youngsters were here for blood; ac­ cording to AMA figures, we had 2 juniors and 24 seniors flying, to say Marty Whittenberg won Expert plus best Repeated winner, Dave Brown, duplicated last nothing of many young open members. NSRCA Jr./Sr. Look out. Masters! year's Masters victory. Flying was generally impressive in all tomorrow! Sunday was also the night of flying time; four days of qualifying classes, but it seems that Lady Luck also our camper decided to blow some of its (Monday through Thursday) and two was having fun . . . Dave's engine de­ cool; all the lights went out, except in days of finals (Friday and Saturday). The cided to quit while I was running it out the bathroom (now, if you had a choice, finals would involve the top ten fliers for his takeoff run, and after restarting, which light would you prefer stayed on? from each class, and the top three scores was blubbering rich all during the flight Me too!). from the qualifing rounds would count (seems there was some question about it Monday dawned sunny, hot and toward this. We flew four flight lines on a being rich or lean from our “ peanut humid, as it was destined to be all week. huge runway (approximately 1200 ft. by gallery", until I walked back'to the pits We played with our camper lights for a 200 ft.) with lots and lots of space covered with fuel spray from shoulder to while and found no reasonable ex­ around. There were two flying sites (A thigh!); Ron Chidgey had a that planation, so off we went to fly (who and B) with two flight lines on each site. didn’t spin for some unexplained rea­ needs lights anyway!). The frequencies were arranged such son, and Mark Radcliff and Tony Bonetti The pattern event was set up with lots that each line had either 39 or 40 fliers, both had retract failures . .. granted,

Dave Platt's twin-engined "D uellist", like most twins, had a most Dave Brown must have made a good deal on 55 gallon drums of attractive sound. bronze and white dope! Not a modified Phoenix, it's his Curare.

46 MODEL BUILDER Workhorseperson of the R/C Pattern Nats, Betty Stream, receives Young Michael Johncock.a seasoned campaigner (8th Expert), and congratulations from Joe Bridi. Bev Wisniewski looks on. his Phoenix. nothing disastrous, but not very pleas­ that night! (practically non-existent in previous ing, either. Tuesday was again hot and humid, but years) was as fast, if not faster, than a At the end of the day the die was there was a slight breeze which helped normal well-run contest, and the man­ pretty well cast, as five of the Novice, greatly (especially since our camper now agement .. . Betty Stream (event di­ seven Advanced, eight Expert, and five decided to lose its cool completely, in rector), Dick Sonheim (category direc­ Master fliers who were in the top ten the form of a generator malfuction, tor) and Julie Woods (chief judge) .. . after Monday’s flying were still there at which of course means no air con­ were always on the lines, available and theendofthequalifyingflights. . .which ditioning!). The flying goddess was ready to help in any way. No Nats is is not to say the fight was over. better to most everyone today, except without its questions, hassles, and pro­ Monday night, with the help of a Mark Radcliff, who was still fighting his tests, but these three hard-working friend and the advice of the whole retract problems. people handled them quietly and effi­ camping area, we finally traced our light The best part of Tuesday was observ­ ciently. Some difference from years past, problem to a shorted wire behind the ing the running of our pattern event. It when even finding a management type refrigerator (after every cupboard, nook, was a joy to start on time and have the was very difficult! and cranny was emptied and investi­ site completely ready to go, and to have Tuesday saw one-and-a-half rounds gated). I have to admit that, if nothing equipment and people at their proper completed, with another one-and-a- else, we entertained everyone who places without waiting. The judges were half flown on Wednesday. The weather happened to be in the AMA camp area ready and consistent, and tabulation Continued on page 94

Cliff Hiatt, Advanced Class winner, receives NSRCA trophy from George Radcliff, Gus Christman (4th Novice), Mark Radcliff (3rd Joe Bridi as Betty checks the list. Masters), and Jim Keiger check the scoreboard.

Mark Radcliff preps for a flight, as Jim Keiger, his caller, tends a Perennial Mexican competitor, Luis Castenada starts his Dirty Birdi, hand. Ship is a Phoenix 7. as caller Carlos Benitez holds on. Luis is from Puebla, Mexico.

DECEMBER 1978 47 How about this for a soaring site! Al Tuttle's "Saracen" flying wing Al Tuttle launching his prototype Aquila into the incredible lift com­ over Kahului Bay. on the island of Maui. ing up the c liff at the Poli Poli soaring site. their presence makes every high-speed landing very exciting. I asked Al. “ How long does this great soaring condition prevail?” His answer was brief: Rc SOARING “ Always." by Dr. LARRY FOGEL. PHOTOS BY AUTHOR We then moved to another site, this one on the slope of Mt. Haleakala, a • In a recent phone conversation with Maui is a beautiful island comprised of 10,500-foot extinct volcano rising from sugar cane fields, through high grass and Al Tuttle, a fellow member of the Na­ two mountains and a valley between natural blossoms to the higher eleva­ tional Soaring Society, I clearly heard them. It’s lush and green. The trade tions. Here there is little vegetation. The him claim that he flies at the w orld’s winds from the northeast provide steady peak is covered with brittle volcanic ash best soaring site. I just couldn’t let such a lift along the north shore. The only . . . hardly a suitable landing site, espe­ remark go untested, so I packed three problem is to find suitable launching cially when you consider the air density sailplanes and grabbed the next flight and landing sites. at that altitude. Incidentally, Al is super­ for Hawaii. Al met me at the Kahului About five miles northwest of Kahului, visor of the observatory and satellite airport on the island of Maui, then took Route 34 takes you up the cliff. So you’re me to his favorite soaring sites . .. good presented with a spectacular view of the thing, too, since they’re both on private whitecap-specklea bay, with the town property. and sugar cane fields in the distance. You park the car, scamper up a sharp incline, and over a low barbed-wire fence. After a few hundred feet of more gentle climbing, you’ve reached a super slope site. You’re now ready to launch. Al pre­ pared his Saracen ... a fully aerobatic flying wing that really performs. You heave the plane. It moves out. gradually descending until it passes over the edge of the cliff. From then on, all is UP. Now you can perform any maneuver you can imagine and even chase the clouds as they form overhead (an expected result of the updraft). There seems to be no end to the lift. A Cheetah just misses the target at the "beer This is grazing land. The local cows Larry Fogel launching his Olympic 650, can bowling" event at Torrey Pines. show little interest in our activity, but designed for two-meter soaring events.

Another near-miss, this time by Phil Merrick and his Windfree. As How much lower can you get? A Cheetah passes under the line with you can see, this event is very popular with the spectators. room to spare at recent Torrey Pines limbo contest.

48 MODEL BUILDER generally form at about 6,000 feet. If you’re lucky, you remain in such a “ puka” , the Hawaiian word for “ hole in the sky” ... enough blue sky to allow you to watch your bird as it maneuvers between the constantly changing clouds. If you get trapped in a cloud, the procedure is to spin down until you reach clear air. All eyes are on the lookout for your craft. Very exciting!!! Al is still flying a prototype of the Aquila. Jim Martin flies a very modified Square Soar. He drives the V-tail with a mixer of his own design and construc­ tion. It’s neat! Say, have you ever had Now that's the way a sailplane ought to be flown! Cecil Haga was the only competitor at the your sailplane attacked while it’s in 1978 Nats to pull up a chair for his 7-minute duration flights. He's Legionair Sailplane mfgr. flight? Jim watched as a frigate bird took on his Square Soar. The result was considerable damage to the wings, but still less than total destruction. Victor Am or dem onstrated his Das Slupen Thing, while Pete Wolford prepared his Olympic II for similar action. By the way, if you’re on Maui without access to the private property soaring sites, there’s always the athletic field of Maui Com­ munity College. I tried that too; it works fine. While in Hawaii, I couldn’t resist visiting the island of Kauai. This "garden island” is less industrial, and yet the soaring sites are harder to find .. . but they're there, and worthy of your effort. For those who like excitement, there are schoolyards near Kapaa which permit you to launch into the trade wind as it glances off the beach and frontage road. Excitement is provided by the turbu­ lence and the school children who Chet Tuttle's original design "Dreamer" on winch tow at the Nats. Thirteen-foot model has tip surround you with interest and ride their spoilers for turn control, reported to be very effective. bicycles across the yard while you’re tracking station situated on that peak. truly feel that you're part of nature. trying to find a vacant spot to land on. I He’s now lived on Maui for four years, I started to set up a hi-start, but Al and found myself giving flight instruction to and calls this place home. his friends said that was unnecessary. a number of youngsters in return for But the best soaring site is Poli Poli, off They tossed their thermal ships into the their keeping the landing site free and Waipoli Road at about 5,600 feet. You gentle slope lift and traced large con­ clear. chug along a narrow winding road, zig­ stant-altitude circles over the valley. You ought to visit Princeville, near zagging up steeply inclined meadows. Soon your ship happens upon a thermal. Hanalei, on the northernmost edge of Imagine standing in knee-high grass In the local parlance, you’ve found an the island. Here there are large grassy dotted with yellow flowers, looking “ Otis” . At first I thought this was a fields for thermal soaring when the wind down over unlimited Elysian fields Hawaiian word, but it's simply their isn't too strong. If you get high enough, bounded on the north and south by the name for thermals that take you up like there's ridge lift from the trade winds. blue Pacific and on the far west by the an elevator. You can't visit Kauai without following other mountain (which is usually capped At times, you find lift which carries Route 50 to the western-most (leeward) by gray clouds). It's really inspiring. You you up between the clouds, which Continued on page 102

The original prototype Pierce Paragon, flown at the Nats by Col. NSS President, Stan Pfost, flew an extended-wing Paragon at the Nats, Bob Thacker. placed 4th in Unlimited Open. DECEMBER 1978 49 0 2 g s i n i n = w CO

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Byron Sansom and his Bingo, kitted by Dumas. Andy Littlejohn and his Boomer. Look at the Boat won 1st at 1975 ACCR. length of that keel! ^ ^ £

ID ir> ι/τ ;£íí»tn < / I t Z STRICTLY S l O By ROD CARR ^ ^ !7i > r rsiLiT . in • Liberally sprinkled through this col­ Well, there you have it. Put these 5 umn are the remaining pictures from the dimensions down on a piece of paper, z 50/800 Western Divisional Champion­ fill in the blanks between, and you’ll 0£ LU ship. As of this writing, I've heard reports have a world beater. H from the class Nationals, which was won I was pleased to hear that the skippers 50/800 boats featured in the photos. I little of their time to showing it off to the r- think an immediate conclusion from the folks who have neverseen R/C yachting, z Γ .„uijJinoiO table is that the boats are all tending and then do a little organizing so that the ui Ln n ^ u 1 (N ΓΙ '(N 1 __■ ■ . toward a similar displacement and participants can maximize the fun that (/> :5 CD > aspect ratio of the sails has resulted in for good luck, and it must have worked. 2 0 h the need for good reaching perfor­ Meanwhile, up in Rhode Island, Buddy mance and has compromised the 85- Black dusted off a vintage 1970 EC/12 inch rigs which appear only rarely. hull (remember when they didn’t look m o d e l b u il d e r 50 Chuck Black 4761 Niagara Ave. San Diego, CA 92107 9. Denver Area MYA Joe j. Vella 7913 Rarita St. Denver, CO 80221 12. Northern CA S/B Fleet 2 George Montague 305 McCormick Ave. Capitola, CA 95010 15. Golden Triangle MYA Bill Hays 213412 Sorrento Dr. Largo, FL 33540 18. Buffalo Model Boat Club Leonard E. Salika 110 Bidwell Pkwy. Buffalo, NY 14222 21. Stormbird MYC juduth E. Gabay 5900 Saranac Ave. Columbus, OH 43227 23. Helmsmen MYC Bill Baughman 12762 Spring St. Chuck Black's new design is called the 'T e m ­ Garden Grove, CA 92645 Modified Wind II by Lionel Goodman. This pest". Another long, skinny keel! 24. Delaware Valley MYC design won the 1978 ACCR. like Woody Woodpecker with a thyroid John Krick 25. Minute Man MYC condition?) and proved once and for all 214 Rively Ave. Park & Recreation Comm. that the differences between skippers is Glenholden. PA 19036 Town Hall, Room 25 so much of a gulf that a meahingful Needham, MA 02192 measurement of hull difference is yet to 26. Sandusky MSC be proposed. Shannon McGreevy I’m sorry not to have more regatta 828 Salem Dr. results, but the folks who run them just Huron. OH 44839 don’t bother to put me on their mailing 27. Conn. Valley MYC list. The following are more AMYA George Bielak sanctioned clubs: 78 Northbrick Lane 3. R/C MARINERS Wethersfield, CT 06109 Ray Kieding 28. EL DORADO YACHT CLUB 290 N. Fairview Ave. Claudia Lindsey Goleta, CA 93017 515 N. Lyall Ave. 5. Metro Marine Modelers West Covina, CA 91790 Dennis Eason 29. Copper State MBC 1182 Warden Ave. Charles A. Vosburgh Scarborough, Ont. 8137 E. Amelia Ave. Canada M1R 2R1 Scottsdale, AZ 85251 6. Puget Sound MBC AMYA dues are now $10/year and Gerald R. julian should be sent to the new Secretary: 4417 Alar-Mar Lane Bob Espenshade, 7221 Casa Adobe, Olympia, WA 98501 Citrus Fleights, CA 95610. 7. Chicago R/C MYC Bob Cornell I’ll answer questions accompanied 6478 Dauphine Ct. with a stamped, self-addressed envel­ ope: Rod Carr,7608Gresham St..Spring- Elk Grove Village, IL 60807 Another new design is the "Black Magic' 8. San Diego Argonauts Paul Black. field, VA 22151. ·

Fresh out of the water, Don Prough’s double-ended "E pic" shows the The builder of this boat was not identified; all we know is that it trend toward deep bulbs. is a modified Orion.

DECEMBER 1978 51 ^ CHRISTMAS ** SHOPPING GUIDE FOR THE "MODEL BUILDER'S" FAMILY AND FRIENDS • It’s that time of year again! Your basic information, including photos and Now you need only to determine your Christmas list is complete. You have prices, of the most popular model modeler’s favorite type of modeling checked it twice, and decided the model products we have used or observed activity, and look for items under that b u ild e r in your life has not been being used successfully by our friends at heading. With few exceptions, these are naughty, but nice, and deserves some­ the local flying fields, boat ponds, and all things that active hobby dealers have thing he really wants. Comes the big car tracks. There are a few exceptions, in stock or can get for you. The excep­ problem: Just what to get tor Harry? such as the "Damo” engine shown, tions are noted, and ordering infor­ Or Fritz? Or Joaquin? which is too new and too expensive to mation is furnished. It is a common problem, and we be seen in great numbers, but it is Speaking of dealers, depend on him understand how confusing it can be. The something that most modelers would for final information. He can and will 1978 e d itio n of the "R a dio C ontrol gladly trade for their season tickets at the verify that your choice of airplane and Buyer’s Guide” claims to list over 2300 opera. Popularity changes from one area engine, for example, are compatible. items, to which you have to add every­ of the country to another, and there may And if you also need some stocking thing common only to free flight, con­ be similar items more in use in your area. stuffers, such as glue and props, he will trol line, and rubber-powered models. In general, everything pictured and know the proper ones to get. The selection is staggering! described is of modern design, and we Have a Merry Christmas in the com­ Well, cheer up, we are going to help consider it of good quality, and fairly pany of your modeler. If you have any you. JUST for you, we have gathered priced. money left, send ME a card! ·

FREE FLIGHT, AIRPLANES: A-B-C Scrambler, Sig Nlfg. Co. De- FREE-FLIGHT, ENGINES: Cox .15, suitable for A-B-C Scrambler, signed by Jim Clem. For all engines from .15 to .35, $14.95. Kit also available in versions for U-Control and Radio Control. For both includes die-cut Sig balsa, covering materials, full-size plans. competition and sport flying. About $60.

OLD TIMERS, AIRPLANES: Buzzard Bombshell, by Model En- OLD TIMER, ENGINES: 77 Special, by 77 Products, 17119 S. gineering of Norwalk (M.E.N.). Classic free-flight favorite, redesigned Harvard Blvd., Gardena, CA 90247. Custom produced ignition engine; for current radio control Old Timer class. $49.95. ° f 3 *VPe no longer in general production. Direct only, $160.

52 MODEL BUILDER RADIO CONTROL PATTERN. AIRPLANES: UFO, by Bridi Hobby RADIO CONTROL PATTERN, ENGINES: Rossi .60, one of the Enterprises. Modern aerobatic competition model, used successfully engines most used in this class of competition, with airplanes such as by many well-known fliers. $129.95. the Bridi UFO. Tuned pipe available for added power. S166.90.

FORMULA ONE RACING, AIRPLANES: "L ittle Toni", Prather FORMULA ONE RACING, ENGINES: K&B 6.5cc,from K&B Mfg., Products. Most consistent winner ever available as kit, holder of one of the oldest U.S. engine manufacturers. Shown here in front many national records. Fiberglass fuselage, foam wing. $99.95. rotor version, also made as rear rotor model. About S90.

QUARTER MIDGET RACING, ENGINES: Rossi .15, long-time favorite of Q-M fliers, also available in free flight and U-control versions. Made in Italy. From Bill's Miniature Engines. $60.00.

HALF-A RACING, AIRPLANES: "G LH II", stands for "Goes Like HALF-A RACING, ENGINES: Cox T.D. .051, by Cox Hobbies. This Heck", very competitive in this class. From Ace R/C, foam wing engine dominates most Half-A events, can be used for U-control and version $16.95, built-up wing version $18.95. Complete kit. free-flight as well, competition and sport. $20.

DECEMBER 1978 53 AREA-720 so" ENGINE-.50 το .60 KIT NO. RC-19

R/C SCALE, AIRPLANES: P-47D Thunderbolt, from Top Flite Mo­ R/C SCALE, AIRPLANES: Mirage, from Jet Hangar Hobbies, 12554 dels. All-balsa kit of one of WW-ll's favorite fighter planes, featuring Centralia Rd., Lakewood, CA 90715. Modern ducted fan design, util­ many pre-shaped and molded pieces. Uses .60 engine. $79.95. izing all the newest materials and techniques. Direct, $129.95.

MAMMOTH SCALE (also referred to as Quarter Scale), AIRPLANES: MAMMOTH SCALE, AIRPLANES: Fleet biplane, by Concept Mo­ Cosmic Wind, from Bridi Hobby Enterprises. Fiberglass and foam dels. Large 86-inch wingspan model of a 1930 favorite, in balsa and kit of famous racing airplane. Stable, realistic flier. $139.95. hardwood. Realistic construction and in-flight performance. $180.

MAMMOTH SCALE, ENGINES: Quadra, from Shettler Hobby Enter­ MAMMOTH SCALE, ENGINES: Webra .91,from Model Rectifier prises. Big two-cubic-inch displacement engine for the larger airplanes, Corp., the favorite glow engine of the 1978 Las Vegas Tournament of swings large propellers, runs on oil and gas mixture. $137. Champions scale fliers. $230. Tuned pipe muffler, $61.55.

MAMMOTH SCALE, PROP DRIVE: Du-Bro. A device used for R/C SPORT/TRAINER, AIRPLANES: "Kavalier", by Sig Mfg. Co. powering large models with existing .60-size engine and large pro­ All-balsa model, designed for sport flying and training. Uses four- peller. Good way to use an already available engine. $100.00. channel radio and .20-.40 engines. $39.95. 54 MODEL BUILDER I I

I

R/C SPORT/TRAINER, AIRPLANES: Falcon 56. from Carl Gold­ R/C SPORT/TRAINER, AIRPLANES: Sunny, from Mark's Models. berg Models. An updated version of one of the most famous and An attractive biplane design suitable for advanced training and sport most flown trainer and sport designs. All-balsa construction. $34.95. flying. Fast building, all-balsa, complete kit. $32.95.

R/C SPORT/TRAINER. AIRPLANES: "Trainer Hawk", from MRC. R/C SPORT TRAINER, AIRPLANES: Alpha,from Ace R/C. Econ­ All-foam, completely ready-to-fly (ARF) model for beginner of flier omical small airplane for the smaller engines, such as the Cox T.D.'s without time to build. Complete with engine, $90.00. and the smaller, lighter radios. Wood fuselage, foam wing. $19.95.

U-CONTROL, AIRPLANES: Gieseke Nobler, from Top Flite Models. U-CONTROL, ENGINES: Fox .35, from Fox Mfg. Co. Another mo­ Updated kit for one of the perpetually successful controlline stunt dern version of a product that has earned a well-deserved reputation designs. A sure-fire contest winner; all-balsa. $38.50. for quality and dependability through the years. $25.95.

R/C SPORT/SCALE, BOATS: Puddle Jumper, from Sterling Models. R/C SPORT/SCALE, BOATS: Dauntless, from Dumas Products. A A prop-driven air boat that can utilize any .15 to .35 engine already 50-inch scale model of a commuter class boat, can be powered by gas on hand, and a 2-channel (or more) radio system. $39.95. or electric motors. High speed hull design. $59.95. DECEMBER 1978 55 R/C RACING. BOATS: Lil' Lightning, from Steve Muck's R/C Boats R/C RACING, BOATS: Wing Ding, from Octura Models. For all-out Very successful fiberglass model for the new and increasingly popular competition hydro racing, available for .40 or .60 engines, and can outboard class. Complete with radio box. S92.50. be raced in the Unlimited class with twin engines. About $75.

R/C BOAT, ENGINES: 3.5cc Outboard,from K&B Mfg. Co. A new R/C BOAT. ENGINES: HB .61 Marine, from Bavarian Precision Pro­ type of engine that started a whole new class of competition and ducts. Especially designed marine engine for the larger class of com­ sport boating. As used with the "Lil' Lightning''. $99.50. petition and sport boats, such as the "Wing Ding". $100.

R/C SYSTEM "FP-2F", BOATS: from Futaba Industries. One of the R/C RACING, CARS: "HRE 1000", from HRE Inc. Competitive most seen radios at all boating events; also popular with R/C car R/C racer designed by one of the pioneers in this phase of the hobby. enthusiasts. All frequencies, less batteries, $139.95. Consistent winner, complete chassis kit. $144.95

R/C CAR RACING, ENGINES: 3.5cc, by K&B Mfg. Co., an engine R/C ELECTRIC, CARS: Commander car and "Mach 3 " radio, from manufactured especially for high speed competition racing. Seen in JoMac Products. One of many electric cars for legal ROAR competi­ large quantities at all car racing events. With carb, $67.50. tion and sport driving from this company. Complete w/radio, $200.

56 MODEL BUILDER ENGINES, GLOW PLUG TWIN: "Damo", an excitingly different MOTORS, ELECTRIC: A complete class of electric motors for all Swedish import from Midwest Model Supply. If model engines were types of modeling applications, from Astro Flight. Prop reducers used in autos, you'd see this one in Lincolns & Cadillacs. About $500. (shown), batteries, chargers, etc. also available. $20 to S175.

R/C HELICOPTERS: Heli-Boy, from Schluter Products, the inven­ R/C HELICOPTERS: "Rev-olution 40” , by American R/C Helicop­ tor of the R/C helicopter. Latest design, extremely successful both in ters. Flown by 1977 National Helicopter Champ John Simone, Jr. competition and sport flying. Complete kit, $339.95. Uses .40 engine. 4-channel radio. Easily assembled. S239.00. (t

R/C SAILPLANES: Paragon, by Pierce Aero Co. Large 118-inch soarer R/C SAILPLANES: Wanderer 99, from Mark's Models. Latest design designed for competition flying. All-balsa, precision cut parts. Includes by the three-time National Glider Champion, and holder of a 13-hour all hardware. For any 2 or more channel radio. $60. endurance record. All-balsa kit, with hardware. $30.

R/C SAILPLANES: Hawk, by Midwest Products Co. A pre fab glider R/C SAILBOATS: Soling M, from Vortex Model Engineering. 210 kit, requiring only covering of the wing and tail, and painting of the East Ortega St., Santa Barbara. CA 93101. A 60-inch mast, 50-inch fuselage, if desired. A proven graceful flier. S130. hull R/C sailboat, for sport and competition. Direct, about $400.

DECEMBER 1978 57 RADIO CONTROL SYSTEMS: "Signature Series", by Kraft Sys­ RADIO CONTROL SYSTEMS: Super-Mini, from Cannon Electronics. tems, Vista, California. Most sophisticated system now available. The smallest, lightest system currently available, popular with all buil­ Custom made to order. Contact Dave Shadel at Kraft. ders of 1/2A and smaller airplanes. From $185.

RADIO CONTROL SERVOS: "Bantam Midget", from Novak Elec­ MISCELLANEOUS: Rom-Air Retract Gear, from Rhom Mfg. Co. tronics. The muscle of all radio control systems. These are small, Very popular air-operated retractable landing gear system usable with light, strong, designed to work with most radio brands. $30.00. many scale, sport, and pattern designs. Two or three-wheel, from S80.

MISCELLANEOUS: Digi-Pace, from Ace R/C. The latest in radio sys­ FIELD EQUIPMENT: Pylon Brand Starter, from Sullivan Products. tem battery testers. Tells the exact amount of current, thus the exact A great time and temper saver, w ill start all sizes of engines. Two mo­ amount of flying time possible. Detects bad cells. $95. dels available. Standard at $36.95, Deluxe at $39.95.

FIELD EQUIPMENT: Mini Starter, from Astro Flight, Designed for FIELD EQUIPMENT: Charge'N Test, from MRC. A combination use with Half-A and smaller engines. Has smaller drive cone, runs at R/C system battery tester that measures exactly how much battery high rate required for consistent starts. $17. life is left in your system, and field-charges it when needed. $59.95.

58 MODEL BUILDER FIELD EQUIPMENT: "ProTach", by Royal Electronics. Important FIELD EQUIPMENT: "GloBee Fireplug", by Fusite Corp. Modern, instrument with which you can read engine speed, and thus deter­ fully adjustable power source for glow plugs as used in most model mine the most efficient adjustment. For all power models. $27.00. engines. Takes place of expendable dry cells. Rechargeable. $27.00.

FIELD EQUIPMENT: Field Box, by Craft-Air. Something to carry TOOLS: Uber Skiver, from Model Builder Products, this address. A it all in . . . a last-forever molded plastic equipment carrier that holds good knife with changeable blades is a necessity. This is the best one everything, from his radio to the can of fuel and spare props. $29.95. around, with non- blade holder. In different colors, $15.

TOOLS: Powr-Mite Sander, from Strick's Enterprises. Combination TOOLS: Moto-Shop, from Dremel Mfg. Co. A combination saw and sander and grinder that has a thousand and one uses in the model shop. multi-accessory electric tool, very popular and having many uses for Saves time, increases quality. Different models, $30 to $40. the active builder. A great time saver. Complete as shown, $90.

OranobComt H o b b ie s

TOOLS: Formicator.a vacuum forming device from Idea Develop­ GIFT CERTIFICATE: From Orange Coast Hobbies, 14636 Brook- ment Co. Used by the advanced and novice modeler to mold various hurst St., Westminster, CA 92683. Available in any value. Prompt model parts and accessories. Complete with supply of plastic, $39. mailings. Complete stocks of all type supplies.

DECEMBER 1978 59 will generate, in order, too much heat, detonation, and disaster... in the form of ruined engines. As a practical matter, in handling 1/2A-size engines, most modelers are somewhat limited to using commercially available glow heads such as Cox, Clow Bee, etc. Using these in their stock configuration, compression can be P.O. Box 1426 17119 S. Harvard varied by simply increasing or decreas­ Mission. TX 78572 JOE KLAUSE Gardena, CA 90247 ing the number of copper head-gaskets. P.O. Box 2699 One little, .005-inch thick copper gasket Laguna Hills. CA 92653 may not seem like much, but it will change combustion chamber volume to Send in your questions, relative to glow or ignition engines, and these a significant degree. As an example, if experts w ill give you the correct answers. you are using a No. 1702 Cox glow head with one gasket, and then insert a KLAUSE affect the number of oxygen molecules second gasket, you will have increased available to our engines. Remember the the volume of the combustion chamber • This month, we’ll make good on a meaning of some principles of physics? approximately 9%! Now we can see that previous promise to discuss combustion First, relatively low barometric pressure it makes a lot of sense to use three chamber/nitro combinations. Before will mean fewer oxygen molecules per gaskets during engine break-in. The getting to specific examples, let’s briefly given volume and temperature. Second, effective pressure will be lower, and review some basics on engines and higher temperature will mean fewer there’ll be a lot less heat and associated physics. oxygen molecules per given volume and friction while the engine parts are Our model engines operate on what is pressure. Further, high humidity will mating together. generally referred to as a fuel/air mix­ mean a relatively high number of water ture. Since fuel was previously discussed If you have access to a lathe, you can molecules which displace usable oxygen in the October '78 issue of Model modify stock glow heads to increase molecules per given volume, temper­ Builder, it's time to add something about performance. To help save you some ature, and pressure. Tying it all together, that other essential ingredient; air time and the expense of trial and error, on a hot, humid day with low barometric that good stuff we also breathe to keep our experiments have shown^that the pressure, there’ll be quite a few less our human engines running. Air is following modification of th etox 1702 molecules of oxygen, per given volume, composed of a mixture of nitrogen, head will produce a nice increase in available to mix with our fuel. Result: oxygen, small percentages of several power. First, machine .015 inch off the horsepower will be down. other gases, varying amounts of water face of the head. This will decrease vapor, and of course, smog. As far as our Fortunately, we can compensate for chamber volume, and it will also provide engines are concerned, oxygen is really this by using a supercharger to cram a squish band on the head which will the important ingredient.. .specifically, more molecules of fuel/air mixture into help prevent detonation. Second, ma­ oxygen molecules. the combustion chamber.. .an increase chine .015 inch off the shoulder of the Our air is also referred to as being in effective pressure and power. Un­ head, just past the threads. This will under pressure. The pressure will vary fortunately, superchargers, as we typi­ ensure that the squish band will fully with the weather, and pressure will cally think of them, are not currently seat against the copper head gaskets. A available for our engines. However, all is standard Cox 1702 head and a modified not lost, because we can “ supercharge” one are shown in one of the accompany­ our engines by other means, such as ing photographs. As you can see, a resonant exhaust systems. If you don’t significant squish band has been created want to get that complex, we can just by machining off a mere .015 inch. simply increase the effective pressure in At this point, it would be nice to be the combustion chamber by decreasing able to categorically tell you the ideal chamber volume ... a higher com­ head spacing for each head, fuel, and pression head. In addition to that, we atmospheric condition. Unfortunately, could add a bunch more nitro, and really the list would contain literally thousands honk that engine. Right? Well, yes, but of figures, if for no other reason than the there are very serious limitations. Simply so varied weather. Instead,,we’ll do the stated, too much compression and nitro next best thing. Remembering that it's

Suction Fuel System (One Head Casket) 15% 40% 65% Techni-Models 14,300 14,500 Cox 302-1 16,700 17,100 Cox 1702 20,500 21,500 Glow Bee Sport 22,000 22,500 Pressure Fuel System (Two Head Gaskets) Cox 1702 20,200 21,500 22,800 Clo Bee Racing 20,900 22,500 23,300 Top, I to r: Cox 302-I Sport head, Cox 1702 Cox 1702 modified 21,300 22,500 23,500 high-compression head, and modified 1702 head. Note the squish band on the modified Pressure Fuel System head. Middle, I to r: Glo Bee hold-down ring, (One Head Gasket) GB-5P Sport head insert, and GB-5R Racing Cox 1702 20,600 22,200 23,300 head insert. Bottom, I to r: Techni-Models head for .049-.051 engines. Uses short-reach Glo Bee Racing 21,500 22,900 23,500 standard glow plugs. Cox 1702 modified 21,500 22,900 24,100

60 MODEL BUILDER all relative, here are some general with the comments concerning com­ 5) Is there some way to extend plug guidelines and hints for good per­ bustion chamber pressures and nitro. life, or should I expect to blow one each formance: We might also add that the atmospheric flight? (lust got an OPS rear exhaust,.60- 1) With dry, high air temperatures, try conditions during the tests were less size F.R. Perry to really cooking on pipe a little more compression and/or nitro. than ideal. For example, 20,000 rpm . . . sport pylon . . . last 5 flights cleaned 2) With high barometric pressure, try under these conditions, with correction plug completely. On last flight, engine lower compression and/or nitro. factors applied, is equal to approxi­ literally exploded. Fuel was 40% nitro, 3) With high humidity, average tem­ mately 20,750 rpm at standard tem- but engine had flown 50-60 flights last perature and barometer, some increase erature and pressure and zero percent year . . . well broken in.) in compression and/or nitro may be umidity. 6) George, pipes are here to stay, beneficial. It will be relative to where One closing comment. IT IS ABSO­ even for Sunday sport fliers. How about you started out with the compression LUTELY ESSENTIAL that you thoroughly leading the pack with good practical and nitro. break-in your engine before using high application information? (P.S. I’masport Obviously, there are many possible compression heads and high nitro, flier only and so are most of my fellow combinations of the above. Experience otherwise you’re inviting the disaster of pipe-rs.) Thanks. naturally will help, but for starters, we a ruined engine. Perhaps we’ll discuss Sincerely, suggest that you: first, decide upon a comprehensive 1/2A break-in proce­ Horace D. Cain fuel for your 1/2A event . . . again, see dures next time around. Until then, if Dear Horace, October '78 Model Builder; second, if you have any questions, just drop me a I suspect you are my old friend, the atmospheric conditions are not note together with a stamped, self- Horace Cain, who was flying C/L stunt extreme, simply add or subtract gaskets addressed envelope: P.O. Box 2699, back in the 1960’s when I was CD’ing for optimum performance; third, if Laguna Hills, CA 92653. · U.S.A.F. meets. conditions are extreme, and if you’re Unfortunately, there is no absolute having trouble needling your engine, or ALDRICH answer for how long the pipe should be. if it's running too hot, then don’t hesi­ Dear George, There are a number of variables that will tate to back off both the compression You have been talking about pipes, affect pipe length and rpm. Nitro con­ and nitro until things smooth out. Above etc. in your articles, and I think more tent of the fuel, prop, exhaust timing, all, remember that sacrificing a couple information would really help some and bypass timing are among these hundred rpm could well mean a consi­ of us. factors which affect an engine's range of stent engine run and a completed flight. The information that I and fellow club performance when utilizing a tuned To give you some idea about what to members need is the practical applica­ exhaust system. expect in the way of performance, we tion of the pipe for pattern and sport ran a series of tests using a well-broken- pylon flying. We don’t expect a "This is 1) Resonance of a tuned exhaust in Tee Dee .049. During these tests, the it!!", but at what point do we start? system has one variable that is not as average temperature was 80° F, humi­ 7) How long from glow plug to center easily nailed down as the timing, for dity 53%, sea level barom eter 29.39 or high point of pipe? .40? .60? instance. This variable is the speed of the inches, and the test elevation was 1200 2) How much variation of above gases in the pipe. There have been many feet. The fuels used were: length for different rpm's? 74,000? figures published for the wave speed of gases in a pipe, varying from 1500 to 1700 Propylene Klotz 75,000? 16,000? 18,000? 20,000? 3) You’ve mentioned nitro previ­ ft./sec. Most of these numbers come Nitro Oxide KL-100 from motorcycle people and are based 15% None 20% ously, but what should I expect with an OPS .40? K&B 6.5? S.T. X-60? on gasoline. Enter methanol and nitro- 40% None 20% methane. Methanol flashes at 52 F., 65% 15% 20% 4) What is a practical rpm range to tune for in a .60 pattern engine? How where nitromethane's flash point is 96 All remaining percentages are methanol. F.l Surprise! That’s right, nitro is harder The test prop was a balanced, fiberglass much rpm increase should I look for, 4-3/4x3 with square, blunt tips, .550 inch within practical reason? Continued on page 116 wide and .075 inch thick at each tip. This

is our standard test/reference prop. It is 1 1 approximately equal in performance to 1 1 a balanced Cox gray competition 5x3 1 prop. It is also approximately equal to the in-air performance of a Cox gray 1 1 ! competition 6x3 prop. ______. - The following heads were used during

the tests: \

\ "

Cox 302-1 (low compression, sport \ \ \

head) I Cox 1702 (high compression) Cox 1702 (modified as previously described) FIG. 1 Techni-Models Custom Cylinder Lp - ψ TUNED PIPE/MUFFLER Head (used with a K&B short plug) Glo Bee CB-5P (Sport) Glo Bee GB-5R (Racing) A few additional comments seem appropriate concerning the Glo Bee Sport head. To begin, it has higher compression than the Glo Bee Racing head, and the element is designed for fuels containing 5 to 50% nitro. The Glo Bee Racing head is designed for use with 50 to 70% nitro, and it has a colder, heavy duty element designed to withstand many high nitro runs. We also tested the Glo Bee Sport head on the 65% mixture. It was very difficult to needle, and the engine ran noticeably hotter. This agrees DECEMBER 1978 61 models at San Diego meet (front to rear): Cessna 180, Rearwin Bob Boucher's Partenavia P-68 won 2nd in Scale at San Diego. Model Speedster, CW-1 Junior, three P-68’s, and Gee Bee Sportster. is a good choice for an electric twin. ; ELECTRIC POWER By MITCH POLING X

• Last month, I made some estimates on long, and the 15 ship would be 3 feet in on July 16. Bob says that Bob and Sandy what a competitive indoor electric R/C diameter by 8 feet long. Peck are the local electric livewires in plane would be, given the rules for the I checked around the local sources for San Diego and that they have been ac­ International Modeler Show record helium, and it costs about 10c per cubic tively promoting electric flight for the trials at Pasadena, CA, on January 6 and fo o t. This was a lot less than I had past two years. They organized and ran 7,1979. The airship category emphasizes expected; even the Astro 15 ship would the meet, and their company, Peck- distance instead of endurance; the only cost $6.50 to fill, and the 020 ship Polymers, together with Astro Flight, longest flight of a lighter-than-air model would only be $1.60 for a fill! This makes donated the trophies. The Pecks deserve around the indoor figure-eight course the LTA a lot more attractive than I had some praise for supporting electric wins $250, a sizable prize. One com­ first thought. Anyone for LTA's? Let me flight. Their company sells an excellent plete lap is about 800 feet long. The only know if you do it, and send photos, any line of peanut scale kits, plus electric lifting gas that is at all practical is helium, type will do. The details of the Record flight supplies. which can lift one ounce per cubic foot. Trials are given in the September issue of The weather was hot and there was An Astro 020 ship might weigh one lb., Model Builder, in the R/C World col­ just a bit of breeze (great for scale an Astro05shipwould beabout two lbs., umn. For more up-to-date information, flying), but the thermals were weak and and an Astro 15 ship would be about write to Model Builder, 621 West 19th, hard to find. The sailplane event started four lbs. If the airship is cylindrical in Costa Mesa, CA 92627. promptly at 9 a.m., and Dale Black went shape, then the 020 ship would be 2 feet Bob Boucher sent photos and a com­ up first with his beautiful Buteo. He got in diameter by 6 feet long, the 05 ship plete report on the first all-electric about a thousand feet of altitude, then would be 2-1/2 feet in diameter by 6 feet contest in San Diego, at Miramar NAS, Bob Boucher went up. Both soon hit sink, and times stayed low most of the day. The pattern seemed to be fast climbs followed by fast sink! Bob Torres and Steve Neu got maxes by going downwind about a half mile and getting lift off a hill, but the scores were all low compared to the January Model Builder contest where the top ten places all got maxes. Bob Torres took first with his Buteo, Dale Black was second with a Buteo, Steve Neu was third with a Super Monterey (Astro Flight kit), and Richard Greibe was fourth with a Super Mon­ terey. All these were powered by the Astro 05. The Buteo is really a super design. Dale Black beat me out of first place last January with his, flying against my Olym­ pic II, both with Astro 05’s. Both planes are designed by Lee Renaud (Cox Hob­ bies). and the Buteo can outclimb any other Astro 05 sailplane that I know of, plus the fact that it has a good glide ratio. Unfortunately, Lee hasn’t published plans or kitted it, so write him at Cox Hobbies if you are interested! The scale entries were quite inter­ esting, with two new designs by Phil Bernhardt and Bob Sliff. Phil took top MB's Phil Bernhardt was 1st in Scale at San Diego all-electric meet. Model uses an Astro 075, honors with his Curtiss-Wright Jr., Ace micro airborne unit. Curtiss-Wright Jr. designed from Paul Matt 3-views. powered by an Astro 075. Phil finished it 62 MODEL BUILDER in red and silver, the same colors as the full-size Jr. that one of his flying buddies used to own. The model did not have very many flights on it before the contest, but despite this, Phil did a fine job of flying. The plane looks very realistic in the air. Phil did a breathtaking seven or eight-turn spin and pulled out at five foot altitude in front of the judges’ noses. Phil claims he planned it that way, but then why were his hands shaking? Second place went to John Sczary’s Partenavia P-68 (Astro Flight kit) with flaps, ailerons, rudder, elevator, and a three-speed motor control. John's plane was nicely detailed, and his scale presen­ tation was exceptionally well done, with color plates of the full-scale plane. Bob Boucher got third place with his three- year-old P-68. It has a few wrinkles, but is still going strong. It is four-channel, with on-off motor control, and weighs four pounds. Bob believes in keeping things Astro Flight's Super Monterey makes an excellent powered sailplane with an Astro 05 system. light and simple, and got the second best The one above, held by its builder, Steve Neu, placed 3rd at San Diego meet. flight points of the meet. Bob quotes an old French proverb on this; “ You can make the best soup in an old pot” . I agree, as my Brigadier and Olympic II are close to the two-year mark, and they get better and better with each flight! The P-68 is a potent scale model because it flies so well, and is fully aerobatic with the twin Astro 05 unit. Fourth place went to Bob Sliff with his nifty Rearwin Speedster, powered by a geared Astro 15 turning a 13x8 Y&O prop. It is 1/6 scale, with a span of 64 inches, a three-channel Cirrus radio and an Astro Flight electronic speed control. It weighs four pounds, which is really light for this size of plane. It was not quite finished and lacked wheel pants and wing struts. It made its first two flights at the contest, and it flew so well that Bob even looped it on the second flight. When it is all finished it will be a sure winner, as it is very realistic both on the ground and in the air. Thanks, Bob, for your coverage, excel­ Bob Sliff’s brand-new Rearwin Speedster made its first flights at San Diego contest. Model flew great, but lack of struts and wheel pants cost Bob quite a few static points, placed 4rh. lent report, and photos.

Merry Christmas to all, and if it’s too cold to fly outdoors, try electric flight indoors, or race with the sharp little electric cars on the market. Keep warm with electric power! ·

ELECTRIC POWER Bruce McAvinew flew this Long Cabin Old Timer in Electric Sailplane, won 7th. Model uses one of the two prototype speed reducer units now produced by Astro Flight.

DECEMBER 1978 63 rrrw'niinjj . . . STERLING MODELS’ BIG BEAUTIFUL “ML· II” Puddle Jumper R/C Air Boat/Amphibian V'·· for .15-.35’s

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

STERLING MOOELS · 3620 G ST PHILA PA 19134 II no dealer available dtrecl order* accepted with 10* addition*· charge lor handling and shipping (60< minimum m US 51 25 minimum outside U S ) □ Catalog ot entire line ot airplane control line model kits R C scale and Trainer kits boat model kits accessories etc 5(X enclosed □ Secrets ol Model Airplane Building Including design, construction covering finishing Dying. ad|usting. control systems etc 25c enclosed □ Secrets ol Control Line and Carrier Flying Including pretlighl soloing stunting. Carrier rules and regulations Carrier Hying hints and control line installation instructions 25C enclosed Frame Photo Fleveals Simple-Rugged Construction No checks Only.U S money orders or currency accepted Name ______!______Address. -C.lv- -S la te .

64 MODEL BUILDER SPECIALIZING IN RADIO CONTROL j ^ A R K 'S ODELS ______© AIRCRAFT ■M P. O. Box 2134 Escondido, California 92025 MODEL AIRPLANE KITS FOR THE MODELER 57 years of combined building and flying experience have gone into the design of each airplane in the Mark's Models line. Our active participation in both sport and competition flying assures the modeler he is purchasing a proven practical airplane. See these fine kits today at your local hobby shop. Send stamped, self-addressed envelope for free catalogue.

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WingSpan ...... 72 in. Wing Span ...... 99.25 in. Wing A rea...... 532 sq. in. Wing A rea...... 555 sq. in. Weight ...... 24 oz. (Ready to fly) W e ig h t...... 29 oz. (Ready to fly)

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Wing Span ...... 99 in. Wing A rea...... 853 sq. in. W eight...... 46 oz.

Xushwacker Accessories WingSpan ...... 68.75 in. QC Wing A rea...... 555 sq. in. ψ Pow er...... 15 to .19 cu. in. With Weight . . . . 3Vi lbs. (Ready to fly) W e ig h t...... 3 lbs. (Ready to fly) Accessories O.T. R/C seaplane flying has really caught on in the San Jose area. Rats! The engine quit! Jim Kyncy wades out to get his Lanzo Record Here Jim Kyncy is about to launch Homer Stevenson's Buccaneer. Breaker at Thermalita After-Bay fun-fly. Weatherwise, the day started out great, with quite a few successful trial flights. By the time the water markers had been put out for the Precision Taxi event, the wind was starting to whip up. Those models that had polyhedral wings n u e m m suffered the most because of their PHOTOS BY AUTHOR weathervaning characteristics. Once a By JOHN POND wing got down, there was no way in the world of righting the model. As it turned out, young Lawrence Bekins was the • Back in July 1976, we wrote a lead The events for the SAM 21 Hydro only one able to negotiate the complete column on Old Timer seaplane activity. Meet were not firmed up until two course with a small Air Trails Sportster Although it was regarded by some as months before the date of the meet. To with V-dihedral wings. "tongue-in-cheek” , such was not the keep things on a strictly fun basis, the About this time, it was decided to case, as activity is finally starting to membership decided to hold a special abandon the Cross-Country event and develop in a big way. water taxi event, a cross-country run, concentrate on the Pylon event. This As pointed out before,seaplane flying and, of all things, a pylon race for O/T turned out to be more fun, as only two at has always been popular in San Jose at hydro models! As it turned out, one a time raced. Of course, the lowest Calero Dam, and at Lake Elsinore in model could be used for all events, elapsed time of all the races would be Southern California. Activity has gen­ which added hugely to the enjoyment. judged the winner. erally been confined to select groups. A “once-a-year" type contest does not attract modelers to build a special airplane, to be flown at one meet and then put away for another year. It all started when SAM 21 scheduled an O/T hydro contest when making up the 1978 calendar of O/T R/C flying on the West Coast. This bold step, proposed by Bob Von Koňsky, was the kick-off hydro meet. Scheduled for August, this gave the boys plenty of time to get their models ready. This, plus the long drought of 1976 and 1977, left quite a backlog of hydro models on hand. As a matter of fact, the writer’s Gladiator on floats had to wait over a year to be flown View of north end of Calero Dam lake. Bob Von Konsky's retrieval boat (background) proved on water! to be invaluable for picking up stranded models. This is an excellent site for R.O.W. flying.

Daddy Warbucks built this Gladiator especially to fly o ff water. It Big Gee Bee floats look tiny on Speed Hughes' Boehle Giant. Wing hung from his ceiling for over a year before being flown! is supposed to have V-dihedral; wonder why he changed it?

66 MODEL BUILDER Adjusting the floats on Warren Pickering's Lanzo. Simple rubber band installation. A real David and Goliath contest developed with Lawrence Bekins’ Air Trails Sportster and Von Koňsky's Power­ Don Bekins retrieves his Cal Aero Models' Air Traits Sportster at Thermalita After-Bay fun-fly house. The former had a screaming glow sponsored by SAM 30. Model powered by a Cox Conquest .15. engine, while the Powerhouse featured a very deep-throated Anderson Spitfire. ROW In spite of the very close course flown by 1. Hal Cullens (Dallaire) ...... 29:23 Bob, the hot little job was faster, and 2. Jim Kyncy (Lanzo) ...... 27:14 finally finished ahead despite some very 3. Rod Gunderson (Buccaneer) 26:09 wide turns. 4. Speed Hughes (Boehle) ...... 25:39 The winning model, a Long Cabin One would get the idea there were model by Paul Forrette was probably the terrific thermals at Thermalita After-Bay, grooviest model of the bunch. However, but in real life, it turns out the floats do the heralded race between the two not add that much drag to the slow- fastest models, Pond’s Gladiator and gliding mammoths. Bekins’ Playboy, failed to materialize, as The best part of these hydro events is a crosswind launch did in the Gladiator the interest that has been generated and and Bekins promptly ran out of gas after the new members SAM 30 has been able two laps and had to ditch the model. to come up with. All Old Timer flying, In any contest, credit should go to whether it be free flight or radio control, those who organize and run it; in this has a tendency to stagnate from com­ case, Bob Von Koňsky for the retrieval petition in the same old events with the boat (invaluable!) and Bill Squire for same winners all the time. Something getting the meet rolling. Based on the new gives everyone a chance to ha ve fun fun, another hydro meet will be sched­ and even win! uled in the late Fall. ENGINE OF THE MONTH SAM 30 FUN-FLY Not many modern day modelers are Not to be outdone by SAM 21, the aware of the Edco Sky Devil, as pro­ very up and coming SAM 30 Club de­ duced by the Engineering Development cided to hold a Texaco-type hydro meet Company (Frank Howarth, Pres.) and in connection with their standard O /T designed by Ira Hassad. Bill Baker's method of making cam riders Fun Fly. As a "throw -in” , this turned out This engine, a mass produced version from commercial control horns (see text). to be so darn popular that another get together was promptly scheduled for three weeks later. Hal Cullens, SAM 30 Secretary, reports the meet held on August 13 at the Thermalita After-Bay, near Oroville, was a real success, based on 19 entries for just a fun fly. (Most guys come just to fly, not compete.) Based on all the favorable comments Hal received from the ma­ jority of the contestants, he scheduled another meet for September 24. The most surprising thing about this contest was the comparison of times between the Texaco and the ROW events. If one considers they were using similar types of models for both events, then the results do not seem out of line. Look at the comparative times: TEXACO 1. Karl Tulp (Dallaire) ...... 27:17 2. Speed Hughes (Boehle) ...... 15:21 3. Karl Tulp (Lanzo)...... 15:07 4. Don Bekins (Lanzo) ...... 12:53

DECEMBER 1978 67 Paul Forrette’s Long Cabin won the pylon racing event at the SAM Bob Von Konsky's Anderson Spitfire-powered Powerhouse used a 21 fun-fly. Looks like Sure Flite floats. simplified version of the Berkeley Gondolier 40 floats. of the Hassad Custom, came out directly Hassad first worked for McFarland engine limitation, had a stroke of .935 after World War II. Interestingly enough, motors, along with Irwin Ohlsson. inches, with a reduced bore of .910. the name, Sky Devil, had been em­ When the company folded, their When interviewed by Bill Thompson, ployed before, as quite a few Hassad paths separated and Hassad caught on an ardent engine collector residing in Customs were sold under this name. The with Grand Central Air Terminal at San Diego, Ira readily admitted that the name, incidentally, was derived from Glendale, the center for Curtiss-Wright. Sky Devil production version never did the airplane club associated with Tom About this time, Major C.C. Moseley meet the performance standards of the Herbert’s Westchester Hobbies in White decided to produce a model gas engine Custom. According to Bill, the thing that Plains, which first sold the engine. With based on Bill Atwood's design, and was missing in mass production was the the "Sky Devils” promoting the engine Hassad and Mel Anderson were hired care that Ira Hassad took when as­ in contests, it was a natural to name the along with Atwood. But, that is another sembling each engine. However, many motor. story we will run in the future. owners were aware of Hassad’s rework To back up a little, Ira Hassad, who is Edco advertisements (primarily in service, and for $15.00 could have Ira still actively running a machine shop in Model Craftsman for the auto racing turn their engine into a first-rate winner. San Diego, was one of the early pioneers trade) showed two versions of the Sky With the year of 1947 starting and the of model engines. He and Irwin Ohlsson Devil, a 1500 SD for airplanes and a 1500 demand for engines finally satisfied, it attended Polytechnic High in Los SDR for race cars. The airplane version didn’t take long for sales to start falling Angeles, where they singly and col­ featured a bore of .940 inches and a off, especially in view of the demise of lectively attempted to build minature stroke of .935. However, the race car gas engines. After graduation in 1934, version, to comply with the .61 cu. in. Continued on page T 24

OLD TIMER Model of the Month EHLING'S Designed by: Frank Ehling Drawn by: Bernard Shulman Traced by: Al Patterson Text by: Phil Bernhardt • TRIANGLE- • Here’s an Old Timer that probably flies better with the wing moved a 1/2 balsa). even |ohn Pond doesn’t know about. It’s inch forward of the position shown, and Bernard says the Triangle is so odd­ Frank Ehling’s "Triangle", designed and with 3/16 inch of incidence under the looking, his wife thinks it’s cute. Well, built in 1938. Actually, the first Triangle l.e. of the wing. He also used spruce for it’s odd-looking, all rig h t.. .nobodyw ill was twice the size of the model pre­ the wing l.e. and (the original used disagree with that . . . but cute? · sented here. When Ehling’sclub decided to hold a marathon contest at Cherry Hill, N.J., he built a half-size version (the model presented here) and powered it with an Ohlsson .23. The idea was to put in as many one-minute flights as possible in one hour. All flights were R.O.G., and if you broke a prop, you were out (that’s why the wheel is out in front of the prop). The model turned out to be a good, stable flier so much so that Ehling won the contest! The plans for theTriangle weresentto us by Bernard Shulman, who got them directly from Frank Ehling himself. Bernard has been flying a Triangle with a Cox Tee Dee .049 and Ace single­ channel pulse radio, and has been having a ball with it. For those who may PHOTO BY BERNARD SHULMAN want to do the same thing, we’ve in­ cluded a sketch of the modified rudder on the drawing. Bernard says the model

68 MODEL BUILDER / Λ)

ii

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1

DECEMBER 1978 FULL SIZE PLANS AVAILABLE - SEE PAGE 128 69 Cox's Skycopter can be modified into a very good performer .. . see text. A slightly modified Skycopter won 3rd place in F/F Helicopter at the 1974 Nats. Even in stock condition, these things are a lot of fun. One thing's for sure: there’s not much chance of losing it in a thermal!

.051 modified by Larry Laulom, swinging a 5X3 Cox competition prop. All I can say is that the airplane looks even sleeker in person than it does in the photo. “ 1/2-A As long as we are into the photo­ graphs, let’s continue. Next up is a very By LARRY RENGER nice choice for beginning R/C’ers. Bill Hill (23541 Belmar Dr., Laguna Niguel, • W orld’s fastest 1/2A! Until further and may be the first time under 1:10 in CA 92577) built the Ranger 42 as a 3- notice, Bob Novak will hold the un­ any form of pylon racing. Bob intends to channel model. He used an Enya .09 TV official world’s speed record for 1/2A- run this little bomb through the traps and a Kraft Sport 6 with the optional powered models. His shrunk-down, next time there is an R/C speed trials in KPS-18 servos. The plane was a very slicked-up, CLH-derived 1/2A R/C this area. He figures he’ll need to work docile combination when I saw it fly. The pylon racer beat a Quarter Midget in a with props a bit to get the best straight- Ranger is one of the very first models to fair race. Not just any Q -M , either; this line speed. use all-foam construction. Carl Gold­ was a fly-off race between the winner of Specs on the plane are about what berg still makes it, and it is still an Q-M and 1/2A unlimited at the June RC you’d expect of a carefully thought-out excellent choice. One thing I would do, Bees’ race at Mile Square, California. unlimited: 28-in. span, 100 sq. in., 5-in. however, is add a couple of lengths of Bob Novak vs. Bob Root and his Cox root chord tapering to 2-1/4 in. at the strapping tape (the stuff with nylon or Conquest ,15-powered Airacobra. The tip, .4-in. root airfoil thickness tapering glass fibers in it) to the underside of the time was in the low 1:20’s on the short to .3 in. at the tip, 9-in. stab span, wing. Covering with Econokote or Q -M course. fuselage is 20-3/4 in. long, 2.2 in. high, Flitekote would be a reasonable alter­ Bob has flown as fast as a 1:09 at the and 1-3/4 in. wide. The radio is RS (what native. Valley Flyers' May 20th race. This time else?) with Bob’s own new Bantam Next is a photo of the bones of a Pilot was on the standard ΑΜΑ 1/2A course. Midget servos. The engine is a Tee Dee QB-10L that I am building. The engine is

Ace's Upstart II is a hopped-up version of the model that helped start One of the first all-foam models, Carl Goldberg's Ranger 42 is still 1 /2A racing on its way. a good choice for a beginner. Performs well on 3 channels, .09-.10.

70 MODEL BUILDER mounted on a replaceable firewall so that I may switch from engine to engine for testing. I ran Nyrod down both sides of the inside of the nose so I can handle throttle linkages on either side. The only other modifications are the shortened ailerons, rounded tail surface contours, a swept-back landing gear to improve gound handling, and a steerable tail- 0 1 » J® wheel. One of these days I'll even finish it! Next photo is all them there itty bitty - - ^ x 1 ’ V - c engine parts. The point of the picture is to illustrate the differences between the Medallion and Tee Deeseriesof engines. Everything you always wanted to know about the differences between Cox Medallions and Starting from the top and working our Tee Dees . . . see text. way down, there is the glowhead. The Tee Dees use a high compression ratio reverse-curve "trumpet” combustion chamber shape. The element takes more of a pounding, but the shape and high compression are good for about 1000 rpm. Working downward, we get the cylin­ der next. The Tee Dee has bypass ports on each side, and on the .049, the bypasses have a special large area con­ tour. The Medallion has only a single, simple bypass. Exhaust ports are the same on both engines. Pistons are next. The difference here is very subtle, with the structures and materials absolutely identical. When I worked at Cox, the Medallion piston was .0001 in. narrower at the top than bottom, but the Tee Dee had a second taper on about the top .06 inch of Larry Renger is progressing slowly but surely on his Pilot QB-10L. This photo shows its current another .0001. I don't know the current state. Model w ill be used to test different engines. contours, and you can bet they are secret, because there is a whole potful of ference, in that the Tee Dee had that Speaking of crankshafts, this is the part rpm hidden in piston and cylinder humongous hole, while the Medallion that breaks on the engine when it’s tapers. doesn’t. The difference counts in timing mistreated. Most bent or broken con- Crankshafts have a very obvious dif- settings and air passage efficiency. rods seem to be the result of bent crank pins. When doing a Davis Diesel conver­ sion on these engines, use at least a one- inch oversize prop to keep the rpm down. The service department at Cox can tell if you have been using the conversion, and since they won’t war­ ranty the engine for that use, you will be courteously informed that you will be charged parts and labor for repairs. The conversions work and are fun to use, but it's at your own discretion and risk not to overload theengine beyond its structural limits. The final difference is the carburetor system. The one on the Tee Dee is sophisticated, well-made, complex, and I never have been able to tell any performance difference between it and the much simpler sprung-needle-in-a- spraybar system on the Medallions. You do have to open up the air passage, of course. The racy little airplane with 88 on the wing is Ace’s "Upstart II". This model, in its original form, was probably the genesis of 1/2A R/C racing. After the event had developed for a couple of years, the design was throughly out­ moded. Paul and Torn Runge decided not to be left behind at the first pylon, so they slimmed it, lightened it, removed the dihedral, and added ailerons instead Bob Novak's incredibly fast Unlimited 1 /2A racer has only 100 sq. in. area, beat a top-notch rudder control. The overall result is a Quarter Midget in a fair fight. Now that's fast! Continued on page 96

DECEMBER 1978 71 East side of Rattey's Raceway, site of the 1978 ROAR Nats. In back- Activity along west side of track. Bumpy track surface is evident in ground is the building that housesa 1/12-scale indoor track. this photo.

how this will be worded or if it will even be put up for a vote. We also talked R/C AUTO NEWS about having a formula road race, counter-clockwise, instead of oval rac­ By CHUCK HALLUM PHOTOS BY AUTHOR ing. This may not even be proposed, since I can’t recall any official alter­ natives discussed at the annual meeting. • Once again, it's ROAR Nats report general membership as: 1) leave the old And now, here is how intend to vote, time. The 1/8-scale Nats events were rule in, or 2) approve the new proposed I and some of the reasons why. held July 26 to August 2, 1978, at Rat- rule (as decided by a majority vote at the tey’s Raceway in North Attleboro, MA. annual meeting). 1) Mufflers: For 80 db @ 10 meters. The weather ranged from hot and humid My interpretation of the rules pro­ Here in Southern California there are to cold and damp (rain). The bigwinners posals are (each member is to vote for many potential track sites, but one club in the Expert class races were: Arturo choice “a" or choice "b” ): has lost a couple of good locations Carbonell in Road, Bill Jianas in GT 1) Mufflers: sound level, maximum, because of noise problems. Another Superstock, and Bob Welch in Oval. I'll a. 85 db at 50 ft. (existing rule). club site has had noise complaints made give some interesting details later. b) 80 db at 10 meters (European against it. Quieter mufflers will defi­ Amateur winners were: Mike Kimrey, standard). nitely help ... probably back east too, Road: Bill Watson, GT; B.J. Hunt, Oval. 2) Minimum tire diameters. where good sites may be more difficult Novice winners were: Jim Nelson, Road; a) 3-inch dia. rear, 2-5/8-inch dia. to find. Also, international events are George Anderson, GT; Sandro Tamburi, front (existing rule). becoming more common. If U.S. drivers Oval. b) 70-mm dia. rear, 65-mm dia. front compete in Europe, the quieter mufflers Before I get into the gory details. I’m (International standard); equivalent must be used. And I don’t think we going to talk about the ROAR annual to 2.76 inches rear and 2.56 inches should neglect the damage that even the meeting. These meetings string out front. current sound limits are exposing the quite a while, but the topics have to be 3) Superstock engine type. racing enthusiast to. After a long day at talked about. Most of the subjects a) Cross-flow ported only; e.g., Veco races, my ears know it, and it takes some discussed related to rules and proce­ 19 (existing). time for them to recover. (I think this dures and are very important to all b) Any engine type, 3.5 cc limit. should still be a non-negotiable ROAR racers. Since you ROAR members must 4) Superstock fuel. rule). vote on the proposed rules changes, I'm a) 10% nitro limit (existing). 2) Tire Diameters: For 70-mm rear putting these proposed changes right up b) Any nitro content. and 65-mm front minimum tire diam­ front. Presently, all rules changes are 5) Superstock minimum weight. eters, because most racers seem to favor supposed to be voted upon by all ROAR a) 5-1/2 lb. minimum weight the decrease, and because it will be a members. Last year, numerous rules (existing). minimum diameter used for inter­ changes were made without member­ b) 5 lb. minimum weight. national racing. Personally, I don’t think ship approval because "there wasn’t Other topics discussed at the annual it will make the present cars perform enough time". Many members com­ meeting were driver classifications at the better if they are presently set up plained, so all the rules discussed at the Nationals and whether to switch to an A, properly. Also, tire wear will be worse in meeting are to be proposed to the B, C, etc. main system. I’m not too sure the usable range of tire diameters

Art Carbonell working on his car. Art qualified 2nd in Sports Road Beautifully detailed 1/8-scale concours-winning Porsche, by Bill and was T.Q. in Oval. Used OPS engine. Miller.

72 MODEL BUILDER π *

Bill Jianas, Expert GT Superstock winner. Arturo Carbonell, Expert Sports Road Bob Welch, Expert Oval winner. winner. because there is actually less rubber on circumstances, weight helps control­ feel it is a necessary step for the sport of the tire to wear. Another con argument lability of even the open class cars with R/C car racing to continue with its is that GT and GN cars, as well as some Schneurle-ported engines, and run car steady growth. Also, there should be sports cars, will look funny and out of weights of 5-1/4 to 5-1/2 lbs. A 5-lb. common (big race) rules throughout the proportion with the smaller tires. De­ minimum would mean that, to be com­ country. spite these con agruments, I still have to petitive with the reduced power, you I think everybody who saw cars with go for smaller minimum diameter tires. would have toget down to the minimum quiet mufflers (European, pipes, or 3) SS: For any 3.5 cc (max) engine. A weight. Besides, if quiet mufflers are otherwise) run, thought performance stock or very slightly modified out-of- required, some more weight is being was hardly degraded. In fact, most of the the-box K&B 3.5 cc engine (probably added, and the 5-lb. limit would really racers using pipe mufflers were using others too) would be very competitive weaken the car and be nearly impossible them because they thought the pipe gave (only a little ... 30 minutes or so .. . to reach in any reasonable fashion with the engines more power. Certainly the crank and piston work required). Cost, current cars. quiet mufflers are competitive with the compared to the present engine with If the A, B, C, etc. main (based on current ones and little performance is conversion partsand 19carb (additional), qualifying time only) vs. the current lost. With a little more trial-and-error or would be less. Most present racers have, Expert, Amateur, Novice and Beginner seat-of-the-pants testing and modifica­ and new racers get, 3.5 cc engines. driver classes comes up for vote. I'll tion, engine horsepower for the quiet 4) SS: For 10% nitro limit; against any probably go for the ABC system, mostly mufflers may even exceed that of the ROAR-lega! fuel with no nitro limit. because of the difficulty of national 85-db mufflers. Even though providing and/or moni­ driver classification .. . and I also think In order to run after 7:30 pm. racers toring fuel is a problem, I feel it is a that there should be no Nationals Begin­ did funny things to get quiet mufflers. necessity to keep the Superstock class ner class. I personally think that the One racer added about a foot or so of more uniform competitively and keep Nationals is no place for true beginners; high temperature hose to the muffler costs down. I’m sure 50% and 60% nitro they can get sufficient and better track tailpipe. Another stuffed the muffler would become standard and required if experience at local races. A point was with a shredded scrub pad (kitchen you wanted to win. Fuel costs would be brought up at the meeting about factory variety) which was like coarse steel wool. much higherand probably more beefed- and sponsored drivers being placed in a The amazing thing was that these ap­ up parts (non-OEM parts) would be special class. Any rules along this line proaches seemed to work with little required, since blown engines would be would be tough to enforce, but we power loss. more commonplace. Keep the dollar should think about it. Old Superstock engines and cars and engine prep time down and com­ Some rules probably should be made don’t get obsolete. My Superstock petition closer with a little effort on race by ROAR (Executive Committee, Rules engine and car was among the (if not day. Committee, or Nationals Committee) the) fastest and best handling at the 1978 5) SS: For present 5-1/2 lb. minimum without a general membership vote. In Nats. The car was built in 1975, and the weight. All major manufacturer’s kit this category, I place mufflers, specific engine parts are from 1974. The bottom- cars, when built per instruction, weigh races at the Nats, and number of races of-the-line chassis was run in 1976, a disc in near 5-1/2 lbs., one possibly as low as (mains) at the Nats. In many areas, brake added in 1977, and an 8-mm Ti 5-1/4 lbs. To get down to 5 lbs., titanium quieter mufflers are a necessity. Inter­ axle and new radio tray added for 1978. bolts and other modifications, some national racers must use quieter muf­ A new carb and piston/sleeve assembly major, are required, and car strength flers. Besides, we will be protecting the were put in the engine for 1978. The suffers. Most racers find that under most ears of the race participants. And I do Continued on page 111

Bill Watson, Amateur GT Superstock winner. Mike Kimrey, Amateur Sports Road winner. B. J. Hunt, Amateur Oval winner.

DECEMBER 1978 73 "Everything you set out to build costs more than first estim ated!" Bill Stroman's Valkyrie uses an Astro .020 electric motor. Very realistic and stable. • O r so sez Jack M cC racken, scale modeler extraordinary. As Jimmy Dur­ F/F SCALE AT THE WORLD CHAMPS ante used to say: “ Them are the con­ 1. Eric Coates D.H. 9A power U.K. ditions what prevail.’’ But we’ll keep on 2. Bill Dennis H.P. 0/400 power U.K. with our projects anyhow. (Both of the above machines dropped bombs in flight) HOW’S THAT AGAIN? 3. T. Manley Blackburn Swift power U.K. Walt Mooney called after a recent 4. W. Hannan Farman Moustique C0 2 U.S.A. Scale Staffel contest to report: “ I’ve lost 5. Bill Warner MacDonald S-21 rubber U.S.A. my Found!” Sure enough, his Found 6. D. Hunt Comper Swift CO 2 U.K. Peanut, featured a while back in MB, 7. P. Sutherland Heath Baby Bullet CO 2 U.K. had gone O.O.S. after an 174-second 8. John Blagg Isaacs Fury Mk. I rubber U.K. official flight. 9. Tom Stark Loening M8 power U.S.A. FREE FLIGHT SCALE AT WOODVALE 10. Walt Mooney Baby Ace (Peanut!) rubber U.S.A. According to preliminary reports, the 11. R. Falconer P 38 rubber U.K. first international free flight scale con­ 12. B. Hotham Bu. Jungmann rubber U.K. test, held in England, was quite success- 13. Bill Stroman Stinson Model S rubber U.S.A. ful. Evidently, the weather was 14. B. Sinclair Nieuport 17 CO 2 U.K. unfavorable during most of the week, but providentially, a few hours of dry, out-pointed the U.S. entries in both real spark that got things moving. In the flat calm occurred one evening for the static scale and flying, suggesting that we United Kingdom, John Blagg responded free flighters, surely a favorable sign! A need to devote more attention to our enthusiastically and rallied many of his hoped-for additional round, scheduled homework! Note that four of the U.S. countrymen to the cause, in spite of for the following day, failed to materi­ entrants were former Nationals winners. some initial resistance. alize, as the climate again turned foul. In Walt Mooney's Peanut created quite a Thanks to Mick Duce, who pulled the spite of conditions, Woodvale was hit in England, and in fact appeared on a concept together, and along with his crowded with spectators, and organizer- BBC Television program broadcast na­ Liverpool club members, made it a in-chief Arthur Searl was heard to tionwide. A tremendous amount of reality. To Arthur Searl, who was so exclaim: “ Where has everybody come effort went into the Woodvale affair and instrumental in obtaining SMAE sanc­ from?” we would like to acknowledge those of tion for the event. To the dedicated Of the 18 or so expected free flight whom we are aware, and hope the volunteer proxy-fliers, who performed entries, 14 actually reached the flight others involved will share the apprecia­ their difficult tasks most efficiently, and line, a creditable showing for a compe­ tion: First off, Bob and Dolly Wischer, the patient static scale and flight judges. tition of this stature, never previously who relayed the dismal reaction to the attempted. The variety of models was idea by FAI HQ. Doubtless this was the Continued on page 109 remarkable but typical of scale meets where individuality is such an important factor. Also varied were the contestants’ choices of motive power, which in­ cluded diesel, glow, CO2 , and rubber. Static scale judging was conducted with special thoroughness by Aero- modeller columnist Alan Callaghan and Canadian Team Manager Ted Sharp, who devoted some ten hours to the task! The “ unusual" documentation accom­ panying Bill Warner's entry reportedly had the judges in stitches. Results were as follows: ( see box) Two other entries, Milan Kacha’s Zlin (Czechoslovakia) and Fernando Ramos’ Monocoupe (U.S.A.), arrived too late to Finished at last! "Daring" Goehring tries on his graceful man-powered machine at Palomar A ir­ participate. The U.K. modelers clearly port. Looks to be a bit on the heavy side. Photo by Warren Shipp. 74 MODEL BUILDER ■.. Ί < "'r ψ 1wi - /ft f NT j á

HANNAN'S HANGAR . COUPE DE PLASTIQUE PEANUT VAR I EZE . . Tiny 13/8 m di io the-footl icale static dHpIny G«n Rcc R 1, by Mike CONTROL LINE .... FuliiKii, PortUml, Oi i-yun, features operation door lulrfi, polished FREE FLIGHT SCALE in«l4.) p/op. j «hI h*f»d-ruU)>«d liuxjuer finish FREE FLIGHT ...... 76 FULL SIZE PLANS AVAILABLE - SEE PAGE 128 MODEL BUILDER Photographer John Oldenkamp caught Harry in the process of launching for his first max at Yes, plastic props can win, as shown by this Taft FAI contest in honor of French flier Pierre Chaussebourg. Harry's wife, Susan, at right. photo taken by Cynthia Sabransky. COUPE de PLASTIQUE

By HARRY STEIIMMETZ . . . Putting an end to the theory that "Plastic is toy and wood is supreme", our author also agrees that picking air is nearly everything about winning . .. and then goes on to tell you how.

• In July 1976, a good friend called and After all, real rubber ships use carved or rising air. NONE OF THEM ARE INFAL­ asked if I would like to take part in an laminated propellers, don’t they? Was it LIBLE. At Taft, it is claimed by some, if invitational FAI meet in honor of the a fluke? Did I just find particularly good you wear polarized sunglasses, you can well-known French flier, Pierre Chaus­ air? Or did the ship really have promise? actually see the thermals coming. I keep sebourg. It seems Pierre, who was To give you some idea, in the following losing sunglasses, so this method I do touring the U.S. with his charming wife year, it placed in nine out of the ten not find reliable. O f course, we can all Josette, had heard so much about Taft meets it entered. At Fresno it maxed out, piggyback, and some meets consist of that he wanted a chance to fly there. His winning the event with 13 minutes and hours waiting for some brave soul to hosts, the Maxmen, put together an FAI 45 seconds. throw his plane into the air while others meet for the middle of July, and sent out In accepting this article, the editor of wait and watch. As the contest day wears invitations to a number of Southern Model Builder. Bill Northrop stated, "I on, or time limits for launching are California fliers. When my friend called, feel that picking good air is 90% of the imposed, the waiting to be certain he added, almost nonchalantly.that the trick. The constant search for the ulti­ sometimes proves disastrous as your meet was in three days. My A/2 was in mate design is a farce!” I don’t agree hopes are cashed when your plane many pieces, my Wakefield just begun, with his ratio, but there's no denying misses the broomstick thermal and sinks my FAI power ship entirely in my head: that the modeler who can’t pick air in down air. what could I fly? The fourth event was doesn't win, no matter what he’s flying. So what methods can be used with Coupe d’Hiver. I scrounged through the The irony of all of this is that I’ve always some consistency to give you at least a garage and decided that some twenty- been a theory designer, rather than a notion of when to launch? One of the two-year-old flying surfaces from an old competitor. The record of this little simplest and most readily available is the cabin rubber ship could be grafted to Coupe is by far the best of any plane I’ve use of cattails, or “ fluffies", as they are my new Wakefield fuselage, if radical ever built. I enjoy the pursuit of good called. A well-ripened cattail can be surgery were performed on its nose. A design and improved building tech­ wrapped in newspaper (so you don’t fill pylon was fabricated to meet cross- niques. I have file drawers full of plans your car with fuzz) and a friend or your section rules and the nose block was and airfoils by the score. But success wife stands upwind, fluffing little pieces fitted with a Peck-Polymers 9-1/2 inch cannot be denied, so let’s talk a little bit of fuzz into the breeze which drifts them plastic prop! In recognition of the about picking air. toward you. They are so light that any up French contribution to the American If you don’t take time to learn someof air is easily detected. If there are power Revolution, the tail surfaces were recov­ the techniques of picking good air, then fliers on the same field, they may curse ered in blue, white, and red. There was any success you will have will be blind you; it seems that fluffies play hob with no time to recover the wing. Test flying luck. A Coupe that has less than 145 model engines when inhaled. took place the evening before the meet. square inches of wing area, weighs 80 The second method, also requiring a It seemed to have promise. grams, and struggles into the air on a helper, is to go to "Toys-R-Us” or other The next day it finished second, one third of an ounce of rubber with a large toy store and purchase a Bubble lace ahead of Pierre, who had had a generally less-than-efficient plastic prop Factory. This device has a reservoir for usy day flying both Wakefield and A/2 which is “ too small", needs all the help it bubble fluid, multiple circles which as well. As the champagne was con­ can get to fly two minutes. There are, in automatically dip when a crank is turned, sumed at the end of a grand weekend, I current use, a number of exotic gadgets and a small fan which blows the bubbles took some gentle ribbing about the and some rather wild theories, all in­ away. They act very much like the fluffies “ toy” airplane flying in a real FAI meet. tended to help the contest flier pick and are good indicators of rising air.

DECEMBER 1978 77 This shows what can happen if you don't watch where you launch . . . the Coupe de Plastique tried to chew up the mylar ribbon thermal detector! Photo shows vast expanse of Taft site.

Several of these devices have been fitted there is often a directional wind change with larger reservoirs, so time need not which can be confusing. It is caused by be taken for refilling during a contest. the circular pattern of the thermal. The third method, which I like very Thermals look a lot like the vortex in much, is to use a long pole (the longest I your sink or tub when it is fairly full and know of is some fifty feet high) from you pull the plug. Incidentally, thermals which flies a forty or fifty-foot mylar and water vortexes move counter­ streamer. With practice, you can learn to clockwise in the northern hemisphere, Max-bound at Lake Elsinore. Plastic prop read the undulations of the streamer and clockwise in the southern. It has to really puts out the thrust. Oldenkamp photo. about 90% of the time. Of course, you do with the earth’s rotation. Now that article in a British magazine which must be immediately downwind! Now, you have detected a lull in the breeze, reported the techniques of three Finnish all three of these methods have draw­ don’t be fooled. Some calms are not fliers, all of whom had made the flyoffs backs. The first two tire your friend or followed by rising air. As the breeze in the World A/2 Championships. As I your wife if you ask her to continually freshens, ask your helper to loft fluffies recall, they wore no shirts, only short loft fluffies or bubbles into the breeze, or bubbles; watch them. If your streamer pants, and had their hair freshly cut. and the streamer pole is not always begins to swing in several directions and They stood with their backs to the wind immediately upwind, since the wind has then balloons gently up, get ready. If while waiting to launch their planes. In a way of changing. there are several streamers on the field, short, they got in touch with their In normal flying conditions, there is they will all point toward the patch of environment. You can learn to do some breeze, sometimes gentle, some­ rising air. something of the same sort if you work times almost a wind. With practice, you All of these methods involve helpers on the secret ingredient of successful will find that often there is a moment of or paraphernalia. Is there any way to model flying: patience. Rising air, or calm just before the warm air arrives. improve air picking if you are alone on thermal air, is several degrees warmer Fluffies or bubbles which were wafting the field with just your model? Yes, there than static air. Down air is often several along just hang or settle to the ground. is! degrees cooler than static air. There are The streamer droops. After the calm, Years ago, I was impressed by an battery-operated temperature sensing devices available on the market, but you can learn to be your own. I can testify that the haircut, especially a close trim on the back of your neck, does tend to sensitize you to a remarkable degree. Scrubbing your arms and face clean just before going out to fly has much the same effect. If you fly regularly at one site, you should get to know the wind patterns and temperature variations throughout the day. A little time spent in such study will go a long way toward improving your competitive record. Remember that I said that the secret ingredient was patience ... patience to pick the best time during the day or round, and patience to wait for good air, even within that part of the day. Don’t be in a hurry; try to stay mentally alert. We’ve all seen more third-round mistakes destroy the chances of good fliers than can be blamed on bad luck alone. Final­ ly, know your model, its flight character­ istics, and test fly. test fly, test fly. Now, a word or two about that plastic prop. The San Diego Orbiteers have been developing the P-30 class of rubber model as a small field, category II, Harry's helper (and wife .. . sorry, guys!), Susan, holds while Harry cranks in the winds. Model has an impressive list of wins, in spite of "to y " plastic prop. Photo by Pierre Chaussebourg. Continued on page 113 78 MODEL BUILDER PHOTOS PHOTOS BY AUTHOR

W Va r i E z e By HANK NIXON .. . After flying this or any canard, you'll wonder why the "tractor" has become the convention. The short fuselage handicaps rubber duration, but the stability doesn't know when to quit!

• The Rutan VariEze is the most exciting degree of roll stability, even when near former at C. Wetting the sides will help homebuilt since the BD-5. It offers very or at the stall point. In hundreds of in bending. high performance, economy, and ease flights, my VairEze has never failed to A fter this has d rie d , add the re ­ of building ... a homebuilder’s dream. land on the gear except when it hit maining formers and nose pieces. I use a Originally Volkswagen powered, it now something. The duration performance is small razor saw to notch the formers uses the same 100-hp engine as the a little less exciting. Mine gets about IQ- after they are in place; I break fewer Cessna 150, and has a primary structure 12 seconds hand wound, and has gotten pieces that way. Next, add the light 1/16 of urethane foam and fiberglass-rein- 17-20 seconds when using a winder and sheet top piece from former B to the rear forced epoxy. This revolutionary air­ well-lubed fresh rubber. The main of the canopy and add stringers to the plane has sparked the homebuilt world, reason for this performance is a fairly bottom. Stringers for the turtledeck are and dozens are now under construction. heavy wing loading, even though mine sliced to shape from 1/20 sheet. Some Choosing the VariEze as a subject for a weighs in at 8 grams including rubber. careful sanding will now bring the Peanut Scale model was not done with Some liberty was taken in increasing the fuselage to shape. dreams of the ultimate competition area of the wing and canard to reduce Form the nose gear from .012wireand model. It was built to find out if this very the loading. Scale outlines are shown glue to the inside of the nose bottom interesting machine could be made to with dotted lines. sheeting. The main gear shape is unusual fly well. My prototype has proven to be Construction should begin with the and is best made from a piece of .008- the most stable Peanut I've flown. Pitch fuselage, since it is most of the work. .010 aluminum, sanded to reduce weight. stability is excellent, due to the fact that Begin by making two sides over the Wire axles are then glued and bound to if the nose gets too high, the canard cross-hatched lines. The longerons look the gear. Install the main gear by gluing always stalls first, due to it being at a big. but some material is removed it directly to the lower longerons, and higher angle of attack than the main during shaping, and they should be add the 1/32sheet filler below. Note that wing. This then drops the nose, causing made of fairly light wood to allow this is probably one of the first times a immediate recovery. enough flexibility for the sharp bends. fiberglass gear has been copied on a The high amount of sweep, combined The sides are next brought together with with the winglet design, gives a high cross pieces at stations A, B, E, and the Continued on page 100

In contrast to most Peanuts, which feature gobs of wing area, the VariEze has a rather minimal amount, which increases the wing loading and results in a faster flying model. Simple construction is evident in these photos.

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DECEMBER 1978 81 Duke Fox must have a built-in smile; as the above photo shows, he smiles even while holding Doc Jackson is laughing because he knows Dirty Kid Josh Rutherford! how silly he must look in that helmet.

ontrol line By DIRTY DAN" RUTHERFORD

SORRY ABOUT THAT coming year of 79. There has been some labeled as one type of modeler or the I missed making the deadline last talk about proposing (once again) that other, there are lots of people who seem month, due to a slight miscalculation in 1/2A Combat be added to the AMA to prefer being referred to as a “C/L alotting my time and a mix-up between rulebook, but no proposal has shown up modeler” , or as an “ R/C modeler” . I am WCN and myself on just how late I could yet. And I most certainly hope that it one of those who don’t like labels. If get my text to him. By the time he called doesn't. anything, refer to me as a modeler and to check on me, I was just starting the leave off any prefixes. Or, better yet, No matter what the CLCB (Control column, and it needed to be in the mail refer to me as a model builder.. . WCN Line Contest Board) does about these by then. You probably didn’t miss much will surely love that. anyway... 60-odd proposals, somebody will be RULES FOR ’80-'81 upset. If you would prefer not to be Even though I write this C/L column, I Here we go again, another rules cycle upset, check out the proposals per­ cannot be classified as strictly a C/L is well under way, with distribution of taining to your favorite events and then modeler (how about C/L model build­ about 60 C/L rules proposals having pass along your comments to your er?), as I am interested in and participate been completed. I’ve got my stack right representative on the CLCB. With so few in many modeling activities that have here beside me, and although the pile is bothering to do so, the reaction of just little to do with C/L. The F/F scene here smaller than before and seemingly one individual tends to carry, a lot of in the N.W. is very healthy, and flying F/F weight. contains fewer of the really wacko remains a very enjoyable thing to m e. . . LABELS in fact, I like to think of F/F as being the proposals that have provided lots of While some of us do not like to be ultimate flying model activity. Once in laughs in years past, there are plenty of proposals that will significantly alter (or even eliminate) many C/L events. For instance, we see the British influ­ ence in a proposal to allow single-wheel gear in Badyear (Scale Racing). For Slow Rat, there is a fellow proposing that we require 2-ounce tanks, and to make mileage an even bigger factor, to go to 100-lap qualifiers and 200-lap mains. An old Speed class may bite i t . . . there is a proposal to drop B Proto. And another to drop A Speed, going instead to FAI Speed for a .15-size event. The proposals I have at this time only show one concerning Stunt, possibly an indication of the Stunt rules being OK as is, and/or that the Stunt guys have got theirstuff togetherand now concentrate on flying the event instead of changing it every other year. In contrast, we have a number of proposals pertaining to Combat, several of which significantly alter certain Tim Gillott calls his original design rat racer the "Shark". A very fast Rat, it loses only if Tim Combat events as flown in 78 and the has equipment problems. 82 MODEL BUILDER awhile I fly some R/C, and while I can get the planes around the sky just fine, I have yet to see the attraction of it all. This winter I plan on flying in some Quickie 500 races; maybe some R/C competition will be different and more attractive to me than just putt-putting around the sky. This last summer, the whole family has gotten involved in R/C car racing, and that is a very enjoyable activity that I plan on being involved with for quite some time. So why do I stay with C/L? Because I have yet to do any modeling activity that provides the fast-speed excitement that C/L Combat does. The feeling of par­ ticipating in a hard-fought match is incredible, so much so that quite often, even the loser of a real battle is so high after the match that he doesn’t even care that he lost. C/L Racing, even though down in participation in this area, also gives a certain thrill that can’t be matched in other modeling events. It’s something that is very hard to describe; you have to feel it to know what I'm talking about. Possibly the only others to Another Rat, this time a very clean inverted-engine machine built by Frank Sanders and flown know this feeling are the R/C Pylon by Charlie (California Flash) Johnson. fliers. And there I go with another label, to be Rich Lopez . . . I’ve pulled that just which started off this whole section. I a few times, you know. don’t like labels pinned on me, but have Betty’s mention of four-page letter been guilty of pinning them on others. I she wrote after the Riverside Nats can’t say it has been unintentional, but evidently is reference to a letter com­ can say that it has been my form of menting on my report about the Nats. backlash to all of the bozos making the Sure wish she had mailed it. very silly statement, "And then I moved Just shortly after getting Betty’s letter, up to R/C”. Having been involved in the "Headwind” , a newsletter put out by many events damanding a high degree Super Stunt Guy, Arlie Preszler, arrived of sophistication, but are not R/C, and in the mail. What Arlie has to say is then having some Sunday flier tell me important enough to reprint here. that what he is doing with his store- "EDITORIAL: I don’t suppose the bought toy is sophistication . . . Ag­ dumb rivalry between R/C types and gravation. C/L and F/F will ever end, but I sure wish Anyway, Betty Stream not only wrote a it would.AVhile we in Lodi seem to have letter to me, but this time she got it in the good mutual understanding, I fre­ mail. Here’s what she has to say: quently read about R/C being the most "Dear D.D., complex and sophisticated event. I have been reading your column "I have often been asked. ‘How come Tim G illott snags his team racer during warm­ since it started . . . alternately cussing you prefer control line to R/C?’ My up practice runs prior to a heat. and laughing, but always enjoying! answer is that I don't. What I personally "I am categorized as ‘R/C’, although prefer in the world of model aeronautics and R/C Scale, I would choose R/C in the 29 years (next month) that I have is competitive C/L Precision Aerobatics. Scale. If it was between R/C helicopters married, I’ve been through it all . . . so I If my choice was between C/L Combat and FAI F/F, I would choose the F/F do resent your putting people in boxes event. labeled ‘R/C’, ‘C/L’, or ‘F/F’. Come "But these are personal choices and I on, man, they’re all modelers! am not knocking anyone whose selec­ "I have also been trying to meet you tion would be different. If your selection for-several years, but even when we are is Sport R/C, then do it and enjoy it. but in the same place at the same time (as at honest guys, it is no harder to install an Riverside last year . . . and you should R/C servo than it is a C/L bellcrank or a have been the four-page letter I wrote F/F timer. If you got involved in C/L you about that!!), our paths never seem Combat, you’d soon be overwhelmed at to cross. the degree of sophistication in those “ Oh, well, I might be disillusioned if simple machines. we met, so I’ll just keep reading and "O ne of these years I’d like to be able writing those nasty letters that never get to stop defending everyone to every­ sent.. . . body else . . . it is the public to whom Sincerely, we should be directing our efforts." Betty Stream” Arlie makes a good point^and I’d just like to elaborate on his poiht about the Betty, you are right, we are all mod­ Combat planes being sophisticated. elers. I’ll try to keep that in mind more They do indeed appear to be simple often from now on. And you're right, models, and have to be, due to their you may be very disillusioned should we expendable nature, but the fact that ever meet! On second thought, maybe Glenn Lee, all-around excellent modeler, but we did meet at Riverside, but I claimed a specialist in C/L Speed. Continued on page WO

DECEMBER 1978 83 Ron Moulton, editor of Aeromodeller magazine, took these photos of W. Dennis' beautifully built H.P. 0/400, which had the highest static score and which placed 2nd overall in the F/F Scale event held at the World Scale Championships, at Woodvale, England. Model is a very stable flier. FREE FLIGHT SCALE By FERNANDO RAMOS PHOTOS BY RON MOULTON • I want to start this month off by saying with, both in cutting it out and securing windshield in place and check to see if thanks to all of you who have taken time it into place. Maybe that is one reason further trimm ing is necessary. A fine-tip to write me, and to compliment this that I prefer bipes over cabin types. At felt marker is ideal to use on the acetate column. I also want to apologize to any rate, here are a few suggestions that for this purpose. those of you who are still waiting for me may be of some help. First, take some The windshield is now ready for final to answer your questions. It seems that typing paper or equivalent, and trim it so installation. This is the part that many the time just flies by so fast that I’m that it will nearly fit as the windshield. modelers cringe when doing. Nothing unable to get the chance to sit long While you hold the paper in place, mark looks worse than smeared glue on the enough to answer them. However, I will areas where additional trimming is windshield. There are two ways to avoid make every effort to do so. Those of you required. Once you are satisfied that the smearing glue. The first method is one who do not get a direct answer will find paper template fits about as well as that I use most often with rubber- the information that you seek in this possible, take the acetate you will be powered models. I first brush the area column. The following is one such using for the windshield and moisten it where the windshield attaches to the request. with water. Place the template on the fuselage with several coats of clear dope. Windshields. Seems as though this is a acetate. The water holds it in place while (I use only nitrate dope, but I'm sure that real problem when building cabin-type you cut it out with either a pair of butyrate will work equally as well.) Once models. I know that in particular, the , a sharp X-Acto knife, or better the dope has dried sufficiently, I hold front windshield is quite difficult to cope yet, an Uber Skiver. Hold the acetate the windshield in place with the aid of

A real scale challenge is this rubber powered P-38 by R. Falconer, of England. Model features well-detailed cockpit and counter-rotating props. Must require special launching technique!

84 MODEL BUILDER drafting tape. For those of you who may not be familiar with drafting tape, it looks just like regular masking tape, except that it does not have nearly the amount of adhesion. You can place it on tissue without it ripping the tissue when you remove it. It can be purchased in art stores or where drafting supplies are sold. For adhesion, I use Kodak’s film splicing cement. The bottle comes with a brush on the cap, but don’t use it. Once you see it, you’ll know why! Instead, use a fine pointed brush and apply the cement to the edge of the windshield. The cement will travel along the edge of the windshield by capillary action. Carefully remove the tape and apply cement to these areas as well. You will find that the windshield will stay in place quite nicely, and with no smudges. P. Sutherland, of G. Britain, placed 7th at Neat rubber-powered Bucker Jungmann by B. The second method is essentially the World Champs with this CO2 Baby Bullet. Hotham placed 12«h at World Champs. same, except that instead of using film splicing cement, I use Wilhold’s glue 1. Cutting out a windshield that has the produced. Sometimes you will see chart made especially for attaching canopies tabs on it will help when it comes time to tape used for this, but this looks kind of and windshields. I prefer this adhesive secure it to the fuselage. All that is hokey, in my opinion. Some of you may for gas models, where the acetate will be required is to make a very small slit not want to take the time to make the thicker in size than that used for rubber where the tab comes in contact with the frames correctly, but the end result will models. Care must be used, however, fuselage. Don’t make the tabs too long certainly be worth the effort. You must since this glue is quite viscous. If you get or they will show up inside the cockpit. first carve a mold which represents the too much on the edges and then push Some film splicing cement around the top of the fuselage where the wind­ the windshield in place, the glue will edge will complete the job. shield will set. You don’t need much ooze, causing unwanted smearing. It is Now, if you really want to be fancy and more than the actual area of the wind­ best to apply the glue with a fine brush, do it the way it should be done, do it in shield. The next step is to carve the working carefully but quickly. the following manner. Most early bi­ shape of the windshield and glue it onto Biplane windshields are easier, and planes, and I’m talking about bipes of the fuselage-shaped block. Make certain here are a few hints that may help you the thirties, had some type of windshield that the windshield is at the same slant make them look even better. Look at Fig. frame. Some had frames around the angle as on the real machine. Fillet the entire edge of the windshield. Others, joint where the windshield block comes which had only the wrap-around type, in contact with the fuselage block with still had to have a frame at the base of the vinyl spackle. When this dries, coat the windshield, otherwise attachment to the forms with several coats of clear dope. fuselage would be impossible. Very seldom to you see these frames re­ Continued on page 98

Bill Hannan's Farman Moustique was proxy- flown at the World Champs, placed 4th.

DECEMBER 1978 85 Marc Nagasawa of Seattle heaves his Bob White rubber ship into the Gary Stevens, one of Dirty Dan's.U/C Combat flying buddies, blue. Photo taken at Harts Lake Prairie, Washington. launches his Sig ABC Scrambler. A real mover with a Fox.

By BOB STA LICK

• The first time a columnist sits down to name, send it in to Bill Northrop for your suasion, this issue (as well as the previous write his first column, it seems as though free subscription to America’s greatest ten) is invaluable. Get your copy for the possibilities are endless. The model airplane magazine. Gotta be first, $7.50 (NFFS members) or $8.50 for non­ thoughts flow and the ideas are fresh though. members from Jack Brown, 20267 North­ and creative. Writing the first column is a DECEMBER 3-VIEW(S) brook Sq., Cupertino, CA 95014. Enclose process of sorting out which things to Pete Stewart's 1/2A Power Model and an extra buck for postage and handling say first. So it is with the last column. Five Triolo’s Manhattan. I guess it was only a here in the U.S.A. years, 60 issues and approximately 84,000 matter of time before the 3-fin craze hit While you are at it, contributions for words have passed since that first col­ the 1/2A models. Recently, there have articles, as well as nominations for the umn. Three FAI teams have been over­ been several examples both here and Model of the Year, are now being seas and we have just chosen the next overseas with this feature. This example accepted for the 1979 Sympo. If you have group. Model Builder has doubled in comes from the pages of Free Flight some burning information to share with size since then. It has been a good five News (England). It features the usual FAI the rest of us, send it to Bob Dodds, Box years. I’ll save the rest of the ruminations gadgetry worked off of a camera timer. 436, Rancho Santa Fe, CA 92067. Bob will until the end of this column, so that if VIT, AR, Flood-off and the like. At 250 be taking on the editorship for the third you want to skip that part, you can feel square inches, it should be a mover. Key year in a row. You can help him by free to do so. For now, let's get on with the stab carefully and launch steeply for contacting him early. If you have a the regular features. short motor runs during trimming. nomination which you believe to be DARNED GOOD AIRFOIL Triolo’s Skyscraper Too is a new worthy of a Model of the Year award, B-6358B version of the model which won last year drop a line with that nomination to Tony This section was designed by Georges in the fledgling Manhattan Cabin event. Italiano, 1655 Revere Dr., Brookfield, Wl Benedek especially for A-1 and A-2 This one, however, has broken the 10- 53005. wings. It is a highly flexed airfoil for good minute barrier with a time of 10:25, set at CROCKET STRIKES AGAIN! gust and thermal stability. Suggestion: Lakehurst on July 15, 1978 (see results ' Jim Crocket, of Fresno, CA, seems to try a turbulator spar or string at around later in this issue). Manhattan isan event come up with the needed little gadgets 50% chord. Use a B-6356B in the sta­ whose time has finally arrived. If you are that make flying fun. He has towhooks, bilizer for best results. A somewhat contemplating flying some indoor this copy cutters (wood stripper), engine dated section, but worth consideration winter, try the Skyscraper. stands, and winding hooks. I have used fo r those who fly in less than ideal NFFS SYMPOSIUM all of them, and the quality is excellent. conditions. This is the 62nd Darned As mentioned in the last issue. Sym­ Jim has now come out w ith a cast Good Airfoil featured in this column posium copies are available. This latest aluminum T-bar style rubber hook, during the past 5 years. If you are issue is a dandy. For any serious free which features an anti-fall-off sleeve to looking for a special airfoil, there is no flighter or serious modeler of any per­ keep the rubber motor nice and tidy on doubt that it has been featured at one time or another. Check over the back issues. MYSTERY MODEL FOR DECEMBER This is a model which I have looked at many a time with an eye to its very pleasing shape and curves. W ithout a doubt, it is one of the most attractive FAI Power models which has ever flown at a World Champs. I have held off using it as a Mystery Model because I thought that too many people would know it im­ mediately. However, after last month's mystery design, you deserve a breather. I passed by several suggestions that I use one of my own obscure designs for this feature, since they all look alike anyhow (so I’ve been told). Instead, you get this Ed Whitten (left) about to present the top 2 cups to Walt Van Gorder and John Triolo (the foreign FAI Power ship. If you know the winner) at Lakehurst Manhattan contest. Photo by Mrs. H.K. Whitten.

86 MODEL BUILDER the hook. A picture of this new develop­ ment will be featured in an upcoming issue of Model Builder Free Flight. The quality, as with all of his other products, is outstanding. FROM THE INDOOR TEAM Ray Harlan, manager of this year’s FAI Indoor team, announces the sale of the 1978 U.S. Indoor Team decal. They are made on self-stick mylar, and are a means to help support the team travel fund to Cardingdon, England. You can get your very own sticker for $1.25 each or a buck apiece if you order 3 or more. Available postage paid from Ray Harlan, 15 Happy Hollow Rd„ Wayland. MA 01778. BIG MANHATTAN FLYOFF AT LAKEHURST Using the 155-ft. ceiling to good advantage, the two combatants, Walt Van Gorder and John Triolo, waited until the end of the contest at 7 p.m. on August 20 to set their times. Walt's time of 9:57 was second best to John Triolo’s new record of 10:25. This event, origi­ nated and sponsored by Ed Whitten, had 8 contestants. High humidity caused problems, and more than one model had good to me. All of you free flighters out some very fine people handling the to have balsa wing braces to keep the tips there cannot know the friendships that Program, but you especially managed to from flexing. The New York Official writing this column have created. I get a involve everyone by continuing to Rules allow this addition. These rules large number of free flight newsletters inform and poll even those of us who also allow the very popular innovation from many of the more active clubs, and didn’t get past the qualifying stage. This of an unlimited number of official much of what appears in this column is continued contact was of great psy­ flights. Manhattan continues to grow in gleaned directly or indirectly from their chological value to me, as I live in an popularity, as it is so much more sensible pages. The newsletters which have area where the nearest known free and realistic than the standard AMA provided the most information for this flighter is 100 miles away, and flying Cabin event. Let's hope that Manhattan column are excellent publications. To space is hard to come by. does not succumb to the rules makers' name a few that you should subscribe “ Your column in Model Builder is also pens, as that seems to be a sure way of to: TheCIA Informer,The Bat Sheet,The excellent, containing a great deal of destroying a budding event. Congratu­ Boeing Hawks Newsletter, Free Flight useful material. I always turn to it first. lations, John, on an impressive win. News, and Scatter. There are others "I look forward to meeting you some FAI TEAM SELECTION FINALS which provide topical and informational day, perhaps at the Nats or some other I just got back from flying in the FAI bits and pieces which have been used. place where modelers meet to enjoy Team finals at Taft. Tom Flutchinson will Newsletters are the lifeblood of the free other’s company.” cover the details in next month’s col­ flight hobby and of magazine columnists. umn, but for now, here are the results: I thank all of you who have seen fit to So it goes. Writing a column is a TIME IN put me on your mailing lists. I also would frustrating experience. Some months, WAKEFIELD SECONDS like to thank all of you who have taken there is just too much to say. Others, just Walt G h io ...... 3420 your time to correspond with me on the opposite. The deadline is there just Bob White ...... 3329 topics far and wide, as well as those of the same. You want to pitch the column Bob Piscerchio ...... 3272 you who have taken time to offer con­ so that it has broad appeal, but if you get POWER structive criticism and praise. I have too technical, most of the readers will Carl B o g a rt...... 3420 been saving such a letter for the last skip over what you report. If it is too Roger Simpson ...... 3401 couple of months. It comes from Bill broad and general, the free flight com­ Doug Galbreath ...... 3374 Park, of North Carolina. I trust Bill petitor will not read it. Somewhere in NORDIC doesn’t mind if I quote him: between is where you want to be. Bob Isaacson ...... 3210 The Mystery Model idea had been fun Jim Wilson ...... 3209 ‘‘I have been meaning to thank you and a challenge to both the writer and Lee Hines ...... 3195 for some time for the great work you did the reader. It provided more correspon­ AND SO IT COMES TO AN END while Chairman of the FAI F/F Com­ dence from the woodwork than any The last five years have been very mittee. In the past, there have been other single topic. Giving Dirty Dan a

DARNED GOOD AIRFOIL - B-6358B

STATION 0 1.25 2.5 5 7.5 10 15 20 25 30 40 50 60 70 80 90 100

UPPER 0.7 2.3 3.4 5.2 6.5 7.6 9.3 10.2 10.8 11.1 10.9 9.9 8.5 6.7 4.7 2.5 0.3

LOWER 0.7 0.1 0.3 0.8 1.4 2.1 3.2 4.1 4.8 5.2 5.5 5.3 4.7 3.8 2.8 1.4 0

DECEMBER 1978 87 ALL TAIL FINS 1/16" SHT. 1/8" V.I.T. MOVEMENT

*>OWER : COX T.D. .049 - .051 W /TOP FLITE 5-1/4 x 3-1/4 PROP. CAMERA TIMER, PRESSURE TANK & FLOOD OFF.

1/4 X 1/16

1/2 A POWER MODEL BY: PETE STEW ART

8 8 MODEL BUILDER Bill Giffen, of British Columbia, tosses up his Maverick (a Tom Hutchinson design).

bad time now and then kept things going up here in the Northwest. I’ll miss that, but knowing Dan, so will he. Now, I finally got a Round Tuit. I can spend a bit more time building and flying. Tom Hutchinson will lose a little of his as he takes over this column. He would appreciate the same kind of help that all of you provided for me. Let him have it when he needs it. Come to think of it. I’ll let him have it when he needs it, too. Try 3255 W. Crocker Lane, Albany, OR 97321. I'll be in the magazines now and then. I’ve still got to finish up writing that “ 25 years of 1/2A Free Flight" article, and I will. There are some other ideas up the sleeve. So, I guess that this is my good­ bye column, but it really isn’t goodbye, it’s just so long for now. We wish to put in our note of thanks to Bob for a job well done. He has rec­ ognized the requirements and has fulfilled them like a pro. Bob, may the Free Flight Bird of Paradise cut your engine one-tenth of a second under the limit . . . stop your winder one turn less than the break point . . . get you off the hook with a vertical towline . . . and may your DT's always work in time, in the air, and in site of the timer! wen ·

" Look at your model, son! Why, the ribs are uneven. The panels don't match. The paper's wrinkled. Why. it's beautiful, son!"

DECEMBER 1978 89 THE SECOND ANNUAL CONSUMER TRADE SHOW JANUARY 6 & 7, 1979 Pasadena Center, Pasadena, California HOME OF THE FAMOUS ROSE PARADE & ROSE BOWL SEE THE LATEST PRODUCTS AND VISIT WITH MAJOR MANUFACTURERS AND DISTRIBUTORS OF: • MODEL AIRCRAFT MODEL ENGINES • MODEL BOATS RADIO CONTROL SYSTEMS • MODEL CARS MODELING ACCESSORIES INDOOR AND OUTDOOR DEMONSTRATIONS STATIC DISPLAY COMPETITION IN MANY CATEGORIES SEE HISTORY’S FIRST INDOOR R/C RECORD TRIALS OVERSEAS EXHIBITORS CORDIALLY INVITED INTERNATIONAL MODELER SHOW. BOX 127. COSTA MESA. CA 92627; (714) 548-4700

were in spectrums generally alloted to he could get in a good flight, and if I put 1 to 1 ...... Continued from page 26 other activities. At any rate, all’s well that in my best flight, we could take home ends well, and day two ended that way. that team trophy. In addition, of course, number two, and the Hiperbipe third. Fouquereau of France put in a barn I needed to have a really good flight to Bob Wischer was fourth, and Steve burner, and the standings were now return to the earlier placing lével. Things Sauger seventh. Reeves, Fouquereau, Underwood, like that really tend to steady a guy's Bob Nelitz. after running out of time Taylor, Rousseau, Wischer, Sauger. nerves! and having a “ landing in the air” , was in One interesting sidelight of com­ Several earlier mistakes I needed to the middle of the pack. petition had occurred up to this point. overcome involved flying characteris­ Tuesday's flying presented some in­ Several models were found to be over­ tics of the Hiperbipe that I was not teresting problems. Shifting winds had weight at the initial weigh-in. In one accustomed to. One maneuver in the caused the flight line to be moved on case, a Swedish model was something pattern was an inverted pass. It seems to Monday, bringing the R/C models like 7-1/2 oz. overweight. I’m certain directly over the C/L aerobatic areas. be human nature that when you roll a you can imagine that removing that plane inverted, it is necessary to push a This was most unfortunate, for it not much is a difficult task. You can further only was distracting for the C/L fliers, little down elevator to maintain level guess where the weight came from in flight. But the Hiperbipe is neutral but made it necessary to keep the R/C respect to the CG. By the second run, upright or inverted, and I had to resist pattern rather restricted on the one leg. there had been some interesting flight On Tuesday, the line was shifted a the temptation to feed in down elevator attempts. lest I start an outside loop! number of times. It resulted in causing My personal feeling is that you should the flight path to pass directly over the show up with a model at least 6 to 8 oz. Indeed, on the second leg of the spectators for a portion of the flight. The under the maximum weight, to be , it flattened out quite a bit landing approach was made from that assured that any weighing scale dif­ because of this “ problem ” . It really is a direction. ference will not do you in. spooky feeling to have to apply up The P.A. announcer was right on the Wednesday brought the best flying elevator to get it down closer to the ball, since he let everyone know when day of the three, and certainly the best ground. the landing would be made and they flights. The standings, with the excep­ The second problem involves the could get a great shot of the model tion of Mick Reeves in number one, effectiveness of the flaperons. When overhead (about 30 ft. overhead!). jumped about like grasshoppers. fully deflected some 25 degrees, the I recognize that attempts were being Steve Sauger pulled the Fairchild off model virtually stops in the air. In made to keep the flight line wind- too early and it banged into the runway, addition, when they are deflected, the oriented so all the models could enjoy breaking the stab and some other parts. ailerons lose most of their effectiveness. true upwind takeoffs and landings, but I He returned to the tent with glue and a On flight two, I got carried away on the must confess to a rather large degree of will to get it fixed so he could make a crosswind leg and put the flaperons concern at flying in that manner. This second attempt. down their full amount, and as a result was especially heightened since we “ turned” (wallowed!) onto final with all were flying on non-typical frequencies Bob Wischer put in his best flight, and the grace of a pregnant water buffalo. which, while they had been approved, if Steve could get his plane fixed, and if I used care to make certain that did

90 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER years & Over 300,000 K & B .40R/C Engines later...... THE DEMAND STILL GOES ON! THERE HAS TO BE A REASON! The most successful and coveted engine for Sport Pattern, Scale and the popular Quickie 500 racing event is the K & B .40R/C. It has been the odds-on favorite, year after year, to surpass its competition. Small wonder the K & B .40R/C continues to be in demand! Check these features and know the reason why: • Front rotor type engine — incorporates large by-pass for more power, the result of a unique machining process. .· Special Perry Carburetor — coupled exhaust/throttle control linked to carburetor provides instant response, from slow, smooth idle to top speed. • “Squish Band" high performance head. • Exclusive K & B no tension, single ring and aluminum piston — does away with long break-in period. it all adds up to many reasons .. . including K & B’s continuous search for, and incorporation of, new and improved features and methods of production.

...AND THE DEMAND ALSO GOES ON! FOR THE K & B VECO .19R/C Redesigned in '69 ... to become one of the most popular .19R/C engines! Like the above K & B .40R/C the K & B Veco .19R/C continues to be in demand therefore making a regular scheduled appearance on our production line. A front rotor type engine, it features: • "Squish Band" high performance head. • Extra deep fins — for cooler operation and increased speed. • Specially machined surfaces of head and crankcase — eliminate need tor gasket. • Coupled exhaust/lntake throttle control linked to carburetor for smoother idle. • Precision Ball Bearings.

• And performance and dependability that won't quit! With our expertise, our years of experience (32 years), our constant research and development, and our quality control, you expect the best from K & B. THAT'S WHAT YOU GET!

D CEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! it can be said that their models, C.A.P. 20’s, are pattern-type aircraft, it was The heat warning Trouble getting obvious they knew them well and had indicator! it together? flown them often. Their takeoffs, land­ ings, and touch-and-goes were very Hot-Hed takes the guesswork Stik-it! is an adhesive that’s HOT out of engine settings and moldable, reusable, fuelproof— nicely done. cowling air flow—Λ visible a million and one uses for field Wednesday evening brought the H E D j and bench. Won’t let go until heat indicator applied in dots, awards banquet at an old established Hot-Hed changes color when you want it to. Residue easily engine gets too hot. removable with lighter fluid. hotel in downtown Liverpool, the Adel- phi. The sheer number of people again $3.00 per half oz. bottle 1 2 r caused the organizers problems. Buses (Comes with instructions) were to be provided to get the huge number from the university to the hotel. Unfortunately, three buses could not FORMICATOR handle the multitude. Neither could the hotel, as rooms all over the hotel were pressed into service, with chamber­ ------4 k- $2.00 per two foot roll maids and porters acting as waitresses (A lifetime supply!) and waiters. The award ceremony was held in the main ballroom, with closed circuit TV to carry it to the other rooms. Most of the people, however, crowded into the ballroom. The word “crowded” is ap­ Vacuum former for plastics- Easy to make your propriate. own cowls, wheel pants, canopies, etc. W orks The evening was capped off with the with home oven and hose type vacuum cleaner. awarding of the FAI medals. Unfortu­ $39—(Includes Asst. Pack of ABS) HYDRALOCKS nately, they were mixed up, due to the Hydraulic unit converts air French language used on them. In an (Instructions for assembly and use included) driven retracts to hydraulic effort to clear it up, we were requested operation. Adjustable to give realistic retract speeds stops to bring them to the microphone so we PLASTIC — Bulk Packs gear “sag-out” and landing could exchange them. Somehow it collapse. Use one for two wheel didn’t work! I managed to get the ABS Plastic Sheets for the Formicator— ships, two for three wheel second place control line aerobatic All sheets 8Vi" x 17"— Packs Only type planes. $8.00 per unit medal to AI Rabe, but since he didn't PCS. PACK have mine, it is still in limbo. (Complete instructions included) THICKNESS PER PACK PRICE So the event was over. Scale would .020(1/50")...... 30...... $13.00 now look forward to Ottawa, Canada, in .030(1/32")...... 20 13.00 Now... A PVA 1980. .045 (3 /6 4 ")...... 13...... 13.00 you can There are some general thoughts to .060(1/16") 10 13.00 obtain! be communicated at this point. First, a .090(3/32") 6 13.00 very large and sincere apology to the One of the hardest things for Assortment Pack (see below) . 13.00 U.S. control line team. Ray Smith' Ro­ Assortment Pack contains 6-.020/ 4·.030/ 3*.045 the hobbyist to find is PVA 2 ·.060/ and 1-.090 sheets. Any pack $12.00 when (Polyvinyl Alcohol)—the only land Baltes, and Dan Osdoba were there ordered w ith the Formicator. ALL ABS is white only. suitable mold release for fibre- ready to compete even if it was to be just glass and epoxy. A dry PVA Over 3]/i lbs. per pack that is mixed with water, a two or three-country contest. Unfortu­ Kant-Stik is a superior mold nately, nobody else showed up to com­ release of highest quality. pete! We were at a loss to understand * ALL U.S. ORDERS SHIPPED $4.00 per one pint mix why others didn’t appear. A conver­ POSTPAID SAME DA Y RECEIVED (Complete instructions sation with one British control-liner who for mixing and use) had come simply to be a spectator QUALIFIED DEALER related that he had been told the com- etition was off, since two countries had INQUIRIES INVITED At Your Dealers, or Order Direct From Coycotted the championships for politi­ cal reasons. The assumption had been Idea Development. Inc. Send self addressed stamped envelope ■ ■ that even if a world championship event . for further info on products P.0. Box 7399 ■ could not be held some competition Newark. Delaware 19711^ would be arranged. It wasn’t, and our not occur on the final flight, and the While that might seem like a very large three members were most discouraged. result was a 2470-point flight which amount, remember that with K factors Their models were on display for most of moved me into second place, ahead of involved and five judges adding to the the event and evoked much interest some six or eight fliers who had spirinted total, 300 points is a very small amount. from modelers and the general public. around me earlier in the day. For instance, the small landing circle is I regret that one of the rolls of film I The team trophy hung in the balance worth a 9K factor, while the larger circle processed did not come out, and the as Steve brought the Fairchild to the line is a 4K factor. Suppose you got a 7on the shots of their models were on that roll. for his final attempt. As this was also the landing. 7x9x5=315 while 7x4x5=140. In Thus, I inadvertantly add to them being final flight of the contest, much atten­ that case, you have a 175-point differ­ left out. My sincerest apologies. tion was directed toward it. Steve put in ence for on contestant on one man­ A success story that must be told, a good, steady flight that, while not euver. however, revolves around the free flight dazzling, reflected a desire to win. The Thus it ended with some surprises and scale competition. Organized on an U.S. and the U.K. team waited with some disappointments. As you look over informal basis, it was very successful, trepidation as the score was checked the results, you’ll note some models with 14 entries. A number of these were carefully and the totals were posted. with lower static scores but which flown proxy by British modelers (and Steve’s 2144-point flight brought the finished quite well, reflecting some very one inept R/C’erfrom the United States, U.S. total to 14,939, just 309 points fine flying. Certainly, Rousseau and who shall remain nameless). behind the Great Britain team with Fouquereau of France are to be com­ The event was run by M ick Duce, who 15,248. mended for flying extremely well. While was most helpful to everyone. In parti- 92 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER INSTALL A Julllvtuv FUEL TANK IT’S GOOD TO KNOW IT’S IN THERE

FULL TANK SYSTEM Modelers agree that Sullivan has put it all to­ gether ... with the tank that's really in there. You can now fill your tank to the top; the bubble allows enough room for the air, with the tubing fitting neatly inside the bubble. All tanks, except those smaller than 4 oz., in­ clude Klapper-Klunk ('stiff-arm' klunk) and klunk pick-ups — choose your own system. NEV-R-LEAK fuel tanks have been the standard favorite for years. Made even better with the A. Enough space lor air In bubble bubble-top FULL TANK SYSTEM, now — more B. Fill tank to the top than ever — they'll become the only tanks you’ll C. Tube goes up Into air bubble ever want to use. 12-INCH LENGTH OF SULLI-CONE TUBING FREE WITH EVERYTANK

cular, I must say "thank you” for the only to ducks with built-in wind anchors, A big “ thank you” to Ron M oulton of advice and help he gave to me as I so the results of Saturday became the Aero M odeler magazine for sharing participated, flying Tom Stark’s Loening official ones. some of his fine photos of the activity. M8. The model was slightly damaged in It was really a most enjoyable, relaxed I trust that you have not taken too transit by the antenna post on the experience, and hopefully Canada will many of my comments about the event Hiperbipe, but by judging time, with the be able to include it once again as at least as being negative. There were problems. help of Mick, it was repaired. an unofficial event. In the interum, These, however, were almost com­ perhaps other countries can be stirred to pletely the result of the sheer magnitude The static judging pressed into service consider it as an official event. of people involved. It is truly amazing Ted Sharp, the Canadian Team Man­ Free flight, to me, has to be one of the that so much did get done when one ager, and while the judging was not highest forms of modeling, for it re­ considers the rather small number of completed by Saturday evening, we quires a modeler well versed in many workers that were actually involved. The sallied forth to do battle with the ele­ areas to be successful. Those trim levers local Liverpool area provided the basic ments. Actually, Saturday evening was on my transmitters allow me some staff, and I dread to think about having quite nice, and we found a good area in margin of error in my expertise as a to come up with that many volunteers. one corner of the airport. builder, and perhaps a second chance. Perhaps what can be said is that the Looking at the photos and the list of A true free flighter tosses his efforts to piece bitten off was more than they models, you’ll note that the rules ac­ the unpredictable winds and must be could easily masticate. commodate a very wide range of types. well versed in the arts of trimming and Certainly the English people, both There were rubber, CO2, and gas pow­ flight characteristics. To see R. Falconer those involved in the contest and those ered models ranging in size from Peanut launch his rubber-powered P-38 made of the general public, were very friendly Scale to multi-engined bombers. me appreciate the desire and interest and possessed of that dry wit that makes Now that’s a set of rules which really necessary to compete in free flight scale. teasing one another great fun. allows innovation and fun competition. Certainly the same can be said of Eric The scale judges worked hard under Perhaps the only detriment would be Coats, who won with a DH-9a bomber, that an official flight needed to be at or W. Dennis who garnered second with often trying conditions, both for the static and flying portions of the contest. least 30 seconds, and some rubber a multi-engined model. power models might be at a disad­ Of the five, two new members were vantage. It was great fun, and I’m interested in included, with Tony Aarts of the Ne­ The Stark-Underwood effort resulted knowing where Mick Duce wears the therlands and Alfred Fisch of W. Ger­ in a first flight, complete with ROG. that patch I gave him from my home R/C many joining Dennis Thumpston of come up two seconds short of official. A club! Great Britian. John Carroll of Ireland, second attempt ended at 23 seconds Each contestant received a very nice and LeRoy Weber of the U.S. when the runway got in the way of the engraved memento of the event and a In later articles I will include some model's nose after a rather pronounced merchandise prize. I brought home a items of concern that occurred during a stall. A couple of broken struts and a very nice knife set, one of several scale meeting at the competition. broken landing gear were repaired for donated by Model Builder, for Tom. I The Underwood clan went on to the next round on Sunday. Unfortu­ also brought home a slightly bent model travel about England, Scotland, and nately, Sunday’s weather was conducive as well! Wales for several weeks following the DECEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 93 AT THE LAS VEGAS TOURNAMENT OF CHAMPIONS, WITH Nats Pattern . . Continued from page 47 $55,000 AT STAKE, 93% OF THE FLIERS USED EITHER A in Texas was very, very soggy that week, and we kept expecting it to come get us, PERRY PUMP, A PERRY CARBURETOR, OR A COMBINATION but it never did. We had four flights in by OF BOTH. Thursday, just in case. Friday again gave us clear weather, so now we have a problem, as everyone had seen each set of judges once, so the decision was to scramble the judging team and fly one additional flight. I heard no squawking about this, either before or after the flight. The flying was very good this round. I was impressed by Tony Frackiowiak, a new Master flier who was flying on our site, and also by Marty Wittenberg (Expert), who is going to cause havoc next year in Masters. And talk about flying under pressure, how about Steve Strieker (Advanced), whose father was stabbed and seriously hurt MOST SERIOUS FLIERS, WORLD WIDE, RELY ON THE defending their van and equipment from PERRY FUEL SYSTEM. robbers during qualifying. And then there is Tony Bonetti, who really tried to PERRY AEROMOTIVE, INC. break his neck on my son's skateboard, but succeeded in riding it so well we 581 NORTH TWIN OAKS VALLEY ROAD decided he should do that instead of fly. SAN MARCOS, CALIFORN IA 92069 / Ph. (714) 744-0841 Wonder if they have R/C skateboards! Anyway, the ten finalists in each class were: NOVICE ADVANCED lvelanD ^ c ' * Anderson Avila SCALE MOOEUMG^ * Christman Clifton WORLD’S LARGEST MASTER MODELS ASS’T Cowee Hiatt GIANTS OF ABOUT 5-10 FT. SPANS Fritzinger Hoppes Catalog Subscription $1 Bill ($1.10 by Check) Same Time — Order A Plan Too I Galle Krafft W# won! end your support os well os what now numbers you oik for sine* we'v· become o volunteer Gilbert Leonard design service organization, without dealer support. 9$ Lock Hudson Romb $49 James Strong M a n u a l 74 Doolittles Gee Bee $45. 77 Flying Fort B-17G $30 Toolan RELIANT SRO 58 Supermor.ne S68 $20 102 Flying Fort B-17G $49 Milla v4 Scale 126* Span *25 42 Howard -Ike*· Roce $25 65 M Marauder B-26 $39 « Pannell Utasi 2'Scale 04* Span ·1Β.·° 78 RTs Weddell Wms $39 49 Block Widow P-61 S26 ' 1VScale 03* Span ·12.·0 64 0 H Comet Rocer $18 99 Block Widow P-61 569 Sheridan Wilson 62 How "Mr MuNJgon" $35 68 Junkers JU8S $18 • é z · •CURTISS GOSHAWK File* 74 Tesco Special' $39 58 H-P 0400 Handl-PG 530 2* Scale 03* Span 010.°° II Mosquito (Sqn 633) $34 100 H P 0400 Hon PG $42 55 Heath Boby Bullet $22 •CURTISS GULFHAWK 1A 81 Fokker 0-8 Ftr >30. EXPERT MASTER Scale 03* Span 015.°° » New '* Scale 041*' Spon *30.°° 58 Mocchi M-5 Sea Ftr $14 78 Sopwith Pup Ptr. $25 '*'···■ Wd II *0 Par Orear tor Poataoa tn * MandMog . 70 Boyle's Gee-Bee $39 65 B-W Bird B.pe $29 Barnes Bonetti Ou«M*aU0 Add IS o o Maka a ll to 62 Curtis. Hawk P6-E $39. 107 Martin MB-1 Bomb $30^ Hartley Brown R ic h a r d G . B a r r o n 1213 Hoiiy spring u* 66 Curt Shrike A-8 $22 66 Coudron G-HI Ob. $1$ 60 Dougios 0-38 Obi $15 61 AEG GIV Bomber $18 Grand Slone. Michigan 40430 Ingerson Chidgey ■en* St OO »or Como>a«a Intomwllon 71 Martin I-10 Bomb $20 58 Solmson 2 A.2 $13- 63 "Skyrocket- XF5F $16. 82 Siemon-Sch DIV $30 Johncock Danley 57 Curt Obs S03C-1 $15 116 uofho BIV Bomber $49 1100 PLANS CLEVELAND MODEL & SUPPLY CO. Mahady Frackiowiak AVAILABLE 10307>M Detrod »-<· iff* Cievelend. Ohio 44102 McKenzie Helms event. We capped off our stay with four L------_ l days in London at the Glendower Hotel, Ramsey Koger run by Caeser Melani and his wife. support and confidence. Redmon Radcliff Caeser is a scale modeler who was Lastly, a “ thank you” to NASA, for it is Strieker Underwood intimately involved in the organization obvious that my ability to devote more Wittenberg Weitz of the international events. It was inter­ time to the association was compro­ By the way, our camper generator still esting to share stories and experiences mised. For this I am truly sorry. The need wasn't generating, and after enter­ with him. to get out a monthly newsletter, along taining the troops at the campground We also had an opportunity to spend with the sale of patches, resulted in each of the last three evenings, while we sot .e time at the Shuttleworth collec- several projects not being realized. tried valiantly to fix it ourselves, we t: ,n and see the full-size DH-88 Comet. Oh yes. .. thetitle“ Look Right,Think finally decided to take the #*"$&# thing I personally would like to thank the Left” . If that seems oblique to some of out and have it fixed before they x-rated many individuals and groups that helped you, you’ve never visited England and the show at the campgrounds. make this venture such a memorable started to step off the curb to cross the Friday, the first of two finals days, was experience for me. Certainly this would street or slid behind the wheel of an again clear . . . perhaps a bit hotter. have to include my family, who cleared automobile to drive from point A to Again, we had four flight lines, two at the decks, making it possible to get the point B, by way of two roundabouts and site A and two at Site B, with ten pilots on model completed. In addition, much a flyover. each line, the judging teams (three helpful advice and direction was pro­ Confused? Welcome to the club. My judges each) were again scrambled. Two vided by various people, including daughters found an English-American flights were flown on Friday, with two Sorrell Aviation. translation with an Oscar Wilde quota­ more to follow on Saturday, with the Monty and Pat Groves did a lion's tion that “ England and the United States best three counted for a final tally. Lady share by providing contacts with Ray have everything in common .. . except Luck again played her game this time Stevens and photo work so necessary for the language.” · with Dean Koger. Dean was up to call his a scale project. Without that source, all first flight ... in fact, he was ready for would have been lost. takeoff when a judge yelled, "W here are Of course, thanks must be given to the the scoresheets?” Dean suddenly re­ AMA and modelers in general for their alized he didn’t have them. Of course, 94 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 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NICKEL PLATED NYLON LANDING § SOLDER LINKS GEAR STRAPS MAKES A STRONG. ATTRACTIVE AND EASY TO These strong nylon SOLDER CONNECTOR FOR SERVO OR HORN 1 NICKEL PLATED FOR A BRIGHT AND SHINY FINISH - straps are molded A NICE IMPROVEMENT OVER TIN PLATING WHICH to fit 1/8" and WILL EVENTUALLY OXIDIZE AND CORRODE 5/32" music wire. PACKAGE INCLUDES 2 SOLDER LINKS AND 2 L IN K G U A R D S No. 238 1/8” No. 112 (2 ea ) 69c No. 239 5/32” S e ts 4 9 c the new Masters finals are very indi­ said and done, the results, down to 20th 15) James Keiger vidualized, and just any scoresheets place, were: 16) Tiny Westberg w ouldn't do, so because his time had NOVICE 17) Thomas Blakeney started, he lost a flight. He later realized 1) Steve Cowee ...... 968 18) Paul Clements he had laid his scoresheets down when 2) Lamar Gilbert ...... 926 19) William Hurley he got a drink of water at the tabulation 3) Tommy Fritzinger ...... 884 20) Donald Krafft tent and later found them laying just 4) Gus Christman ...... 874 EXPERT where he had put them. Gad, what a way 5) Steve James...... 871 1) Marty Whittenberg ...... 12,965 to lose! But as Dean said, it isn’t some­ 6) Dan Sheridan ...... 869 2) Ed Hartley ...... 12,705 thing he'd likely do again! He handled it 7) Gary Galle ...... 860 3) Robert Redmon ...... 12,360 like the champion he is. Mark Radcliff 8) Bob Pannell ...... 852 4) Danny Ramsey ...... 12,345 finally seemed to have conquered his 9) Danny Milla ...... 850 5) Steve Strieker ...... 12,320 problems, and according to his father, 10) Richard Anderson ...... 838 6) Rod Barnes ...... 12,225 George, was flying super. Tony Bonetti 11) Jesse Powers 7) Marvin Ingerson ...... 12,155 was still fighting his gear and it cost him 12) John Wolflick 8) Mike Johncock ...... 12,020 another landing on Friday. 13) Peter Lepir 9) Terrace Mahady ...... 11,650 In case you think nerves get better the 14) Don Roberson 10) David McKenzie ...... 9,997 longer you fly, you might like to talk to 15) Lee Lamury 11) Randall Lyman Rod Barnes, who called a Double Im- 16) Sidney Austin 12) Bob Stewart melman from his Expert pattern, and 17) Jerry Cruse 13) Dan McCan then proceeded to do a Top Hat. He said 18) George Asteris 14) William Adams he realized what he’d done about 19) Dan Crosswhite 15) Bill Payne halfway through, but decided he might 20) Ronald Hesslebrock 16) Carl Garrett as well finish what he'd started. Now that ADVANCED 17) David Noll is Brain Lock!! 1) Cliff Hiatt ...... 914 18) Dave Platt After Friday’s flying, it sure was close 2) David Wilson ...... 901 (only 18 entered) scorewise. Dave Brown and Steve Helms 3) Jerry Clifton ...... 901 MASTERS were only two points apart, with Mark 4) David Hoppes ...... 900 1) Dave Brown ...... 3541 Radcliff closing fast. There were num­ 5) Michael Toolan ...... 887 2) Steve Helms ...... 3475 erous ties and very close scores in the 6) Robert Krafft ...... 876 3) Mark Radcliff ...... 3434 other classes. It was going to be a dog­ 7) Eugene Leonard ...... 849 4) Dean Koger ...... 3426 fight on the final day. 8) Joe Utasi ...... 841 5) Tony Bonetti...... 3411 Saturday again was clear (praise the 9) George Avila ...... 725 6) Ron Chidgey ...... '...... 3344 weather god), and our two final finals 10) Jamie S tro n g ...... 691 7) Tony Frackiowiak ...... 3284 flights were flown. Things pretty well 11) Mel Douglas 8) Donald Weitz ...... 3248 went down to the final round as scores 12) Tom Kirk 9) Charles Danley ...... 3225 were close . . . in fact, the Expert Champ 13) Tommy Moore 10) Bruce Underwood ...... 3163 won in the final round. But when all was 14) Robert Lesmerises 11) William Thomas

DECEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 95 FOKKER FK-3 1/6 Stand-Off Scale now in full kit form and completely redesigned for KIT INCLUDES: one thing: Thermals • Poly Glass fuselage. • Canopy. • Machine-cut wing and stab rib. • All balsa and spruce. • All necessary hardware. • Easy to follow full size plans Wing Span ...... 128" and instructions. Wing Area ...... 750 sq. in. Wing Loading ...... 8-10 0 2 . $89.50 Length ...... 48.5" Weight ...... 42-48 oz. Aspect Ratio ...... 21.85

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commitments; Rhett M iller was missing, May we, please, keep pattern people WANNA START A t last, a spring as well as Mike Mueller, Jim Whitley, running pattern? The NSRCAhasdonea starter for TD/Med. and Fred Kugel. Their places were taken grand job in this department. SOMETHING? .049/.051 glow or diesel. $2.95, plus by a talented new crew ... as you’ll Saturday evening the NSRCA hosted a 50έ postage and notice, places 7-10 in the Masters class "buy your own drinks” -type awards handling on direct are all newcomers whom I expect we’ll party, which I thought was a nice ending orders. see again soon, as well as many of the to a glorious week. Trophies for all Diesel conversions, lower class guys as they move up. Being a classes were awarded by Betty Stream R /C or regular, for top Masters flier is far from a secure and Joe Bridi, and each winner was given .020, .049/.051, and .09 position! Just so you “ oldsters" won’t be a special NSRCA trophy. In this way each completely disheartened, meet Gus flier was given special recognition for his Haff-A performance accessories; teflon reed valves, piston reset tools, heavy-duty Christman (4th in Novice), who assures achievements without having the added reed model crankshafts, cylinder devarnish- me he has been “ interested in airplanes expense and long wait of a banquet. ing brushes, etc. longer than I have ‘been’ ", and Ed Congratulations to all forty finalists, and Dealer inquiries always welcome. Literature Hartlet (2nd in Expert) who calls himself especially to Steve, Cliff, Marty, and requests; please send SA SE. "O ld Ugly Ed” . Take heart, you guys Dave . . . CHAMPIONS ALL. Davis Diesel Development Inc. over 35, there IS hope. So the Nats is over for 1978.1 sincerely BOX 141. OEPT. MB. MILFORD,CT 06460 Problems were few and far between hope next year's is as good. I keep PHONE: (2031 877-1670 ... there was some grumbling about not hearing that the Nats is “ dead” and we having the fliers change sites every other should separate into categories and 12) James Kimbro flight, as some felt the trees at site B were events and do our own things, and my 13) Andre Bouchard a hinderance, but site A had an airport head tells me this is a very sensible 14) Bud Weber nearby with a takeoff pattern which, solution to the problems that plague a 15) Wayne Abernathy although not dangerous, was distracting Nats, but my heart hopes it never hap­ 16) Allan Johncock to say the least. And some felt the pens .. . where else can one find all 17) Joe Bridi judging was off. Personally, I think the one’s friend and enjoy such a variety of 18) Ed Izzo judging was the best I've seen at a activities. It is such fun! 19) Edward Keck Nationals by far. Yes, there were high (P.S. Yes, we did finally get our generator 20) Joseph Gross and low judges, particularly in the finals, in our camper working . . . the day we Airplanes and equipment used was as where we had two high sets and two low left. But we had a flat tire on the way widely varied as I’ve ever seen; Curares, sets, but because everyone had the same home, just for good measure!) · Phoenixes, Bootleggers, Intrepeds, EU- exposure to all sets, and the sets stayed either high or low, it was OK. Con­ 1’s, and Tigertails were all in the top ten, H a lt-A ...... Continued frompage 71 and really the only “ different” plane was sistency is the name of that game. Dave Platt's “ Duelist” , a twin-engine job Very interesting to me was the num­ much faster model. You could gain even which sounded really nice and woke up ber of women involved this year. We more speed by sharpening the leading the crowd, but needed work in the air. had a lady event director and her assis­ edge contour, as is done on the GLH kits Yes, Dave was flying a Curare . . . I tant (Betty and Suzi Stream), a lady (also by Ace), and I think I’d substitute know it was bronze and white checks, chief judge, three lady judges, a lady slimmer wheels such as the 1/2A racing but it was not a Phoenix 8, as many asked pilot, and me (caller par excellent and wheels Joe Klause sells, too. Also, it us, but definitely a Curare (at least that's writer slightly less excellent!). It was in wouldn’t hurt to file some roundess into what the box said!). Crashes were, 1973 that you’ll find a picture in Model the aluminum landing gear. thankfully, not very many, with, to my Builder’s Nats coverage of Bill, Don The last photograph is of an early knowledge, only two, and one of those Lowe, and myself proclaiming me the prototype of the ready-to-fly Cox Sky- was someone who hit a pylon cage on a first Nationals pattern event lady judge copter. Although the basic model is not landing approach. . . . now, a frantic Womens’ Libber I’m of terrific interest, I am presenting it I was somewhat surprised and dis­ not, but it sure seems good to see more here because this model has formed the appointed by the people not present: of “ us” involved, instead of home basis for some very good performing Phil Kraft was a spectator for the finals, as fussing ’cause "h e ’s” gone. competition models. Bruce Paton took his work load prevented a whole week’s May I congratulate all who helped run 3rd in helicopter at the 1974 Nats with a participation; Don Lowe had work our event ... a very professional job! slightly lightened production copter,

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with a Tee Dee .020 substituted for the Next tool is the Powr-Mite sander, by Pee Wee .020 we were usingat that time. Strick Enterprises. This is a miniature disc For current competition, I would again sander with an adjustable table to assure make the engine switch, and lighten the that your work is held at the angle you model's fuselage as much as possible. want. Just the ticket for making stacks of The major change would be to enlarge ribs identical .. . squaring up firewalls the rotor blades by using only the inner becomes a breeze, too. Used freehand, and outer ends, and substituting larger the sander is good for shaping cowls and balsa rotors. Use hard balsa, as the nose blocks. blades must be rigid, and more rota­ Last but not least, there are a variety of tional inertia means greater stability. If small tabletop drill presses available. T H E A N T I C BIPEbv F T o d o r you have stability problems, try increas­ A REAL SHOW STOPPER & CROWD PLEASER Sears and Wards have them, and so do no* t n lo o «« · i w t o f f * t t avt»· IXO* ARC CXTRCMCLT C A*T * VO* CAN MOTH LEARN To « T L P * T<» r i T * l t l t ing the weight at the end of the counter­ hardware stores, discount stores, etc. THI* KIT * RCAI E Cn*rrRťCTTON THROU GH OI T * « JIO» R E ·* IRC(> · HIMRtEíO* ΑΧΪ ELAT H'RFACC * ALL CARlT TERKWCM r* ΠΤΤΙ«». balance arms. You can also add weight e t c . a r e π ·««* ηγ.ο xrtK nir. κττ · s »m i t t » o r r c a ie c o x»t r i v t j .>\ The best ones have smooth drives, true- PAG* · FLOAT* ARE AVA tLARir F P · »EAPLAXt orFRAThSV · l AMU »1ZI • 1LM *Q tN * 1 « AREA · U tS »FAX · A EIGHT t I *» »0 7 * ENGtSE to the tips of the blades themselves for running chucks up to 3/8-inch diameter, »114. PROYIDC AMPLE POXER · A CHAN RAWO · ·»!»<» ARE REMO·. A III Γ in m o m ent* *πι«ητ Arrccrt« tm v riccan c · fo r γ ο μ γ γ γ τ ι c a t a· even smoother flight characteristics. and variable speed. Cost varies from 40 LOOVE AND ΜΡΓ RROCML Rr AFXD «I ** TO PRrUTO« TXT. CIRIP P n Box MAI «AN Mean. CAIIF «31« Be sure to time your engine run to 70 bucks. As an expensive but very MlfU Ο» Pro**» Em . Cnr* «-1Ι C »T** O . *m C · M ill carefully; these babies can go clean out useful accessory, get a drill angle vise. of sight straight up. Plug both tank This little gem will hold your work firmly for percentage-of-importance figures outlets for flight, and use a pin hole in at any angle you choose. between pilot, plane, and luck. The the tank near the top for an in-flight air As I said last month, a good workman consensus came out something like this: vent. can get along with simple tools, but the p ilo t...... 65-70% best ones get the best tools they can plane...... 25-30% BEGINNER’S WORKBENCH afford, then learn how to use and lu c k ...... 5-10% Last month I talked about several maintain them. · A lot of folk seemed surprised at those inexpensive but invaluable hand tools. figures, because we can all think of This month, I’ll cover some slightly specific instances which were excep­ expensive but also very handy tools. Glider Team . . Continued from page 44 tional (Denver itself, with its mile-square Specifically, the ones that seem most patches of Killer Sink, was one of those useful are the Dremel or other hand­ is invaluable, in FAI as well as AMA exceptions.) But over the long haul, I held motor tool, Dremel’s M oto Shop, competition . . . how many times have feel, the figures are basically sound. Powr-Mite sander, and any of several you seen a contest won by the group Certainly the Pensacola contest, with its brands of tabletop drill presses. effort of three or four guys clustered mild lift, mild sink, and benign, humid, The motor tool, especially the ones around a pilot during his last-round seacoast conditions was a perfect with variable speed, provide the capa­ flight? Loners and solo artists, like bility for shaping and sanding inside myself, find there’s plenty of room in example. tight spots, and the cutters are good for soaring for the Rugged Individualist . . . A fourth lesson that came out of this metal cutting, hollowing balsa, opening but the room ’s all at the bottom of the year’s Finals has to do with flexibility. up motor mounts, and shaping plastic scoreboard. None of the four fliers I followed the parts (at lower speeds). The tools are The third thing I learned in Florida has most closely went to Florida expecting great for small diameter drill bits, as the to do with luck. Everyone in soaring has to do much highstarting; hand-tow and high speed seems to reduce the proba­ their opinion of the luck factor, from the winch were their primary launch bility of breakage. rank beginner who sees it as all luck, to methods. But the 200-meter stretch limit The "M o to Shop” is basically a very people like Herb Semmelmeyer (LSF had been removed from the highstart, long-throat jigsaw with a power take-off 098) who says, "If you think there’sa 10% and the few folk who arrived prepared on one side. I use mine both asasawand luck factor, then I have a 10% advantage to exploit this loophole soon had the as a motor tool. The remote power cable on you every time we compete, because rest of us scurrying about, looking for is actually less tiring to use than the there isn't any luck in soaring, there isn’t surgical tubing. The low wind velocities moto-tools. but lacks the variable speed any aspect of it that’s not ultimately were more than compensated for by the feature. The M oto Shop also has buffing controllable.” lift on the field, and almost every high­ wheels, sanding discs, and used to have a At the 1976 Denver Finals, LeMon start launch I witnessed came off the top grinder available. Payne went around asking all the pilots with at least some stretch left in the DECEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 97 ********************************* Hourglass Field. Terry Koplan has been in the top five in just about every contest I’ve ever flown down in Los Angeles the Damned, PROPELLORS and dragged his share of loot home

JM U! 5 NORMANOll »ví 'OBRANCt CA ROM? from Chicago, back in the old S.O.A.R. Nationals days. He flies just about any­ OUR PROPELLORS ARE DESIGNED AND thing Tom Williams at Craft-Air designs ENGINEERED FOR MAXIMUM THRUST 4 (he ain’t picky), and he flies it extremely AND EFFICIENCY. 4 well. » Everyone was glad to see Skip Miller 4 win his way back onto the team. The NO REWORK NEEDED. TAKE THEM OUT * current World Champion, Skip is one of OF THE PACKAGE AND PUT THEM RIGHT 4 the coolest and most thoroughly rational ON THE AIRPLANE 4 competitors I’ve ever been up against. 4 Definitely a right-brain flier. Skip takes 4 very few chances, calculates everything OFFICIAL NATS 4 well in advance, and never, never stops RESULTS 4 thinking once the flight begins. As a 4 flier, spotter and tactitian, he’ll be of the top 40 4 invaluable in Belgium next summer. finalists 55% used 4 .For people enamoured of statistics, 4 here’s a list of the top fifteen fliers (you Zinger props 4 gotta stop somewhere — there were 40 22'/M was our nearest 4 entrants) and their toys, plus the points 4 they amassed out of a possible 12,000: c o m p e t it o r 4 (Author’s note: Please don’t bother Bill 22VM combined other 4 at Model Builder for info on the Bird of 4 Time. Drop me a note at 3635 Mt. b r a n d s 4 Vernon, Sebastopol, CA 95472. The 4 phone here is 707-823-7046.) ·

DIA PITCH DIA PITCH * A L, 4 1 4 8.5" 4 -5 6 -7 F/F Scale . . . . Continued from page 85 4 £ 11" 5-Ó-77.5-8 ψ f 4 4 11" 6W -7W 8" 4-5 6 -7 V 4 Vacuum form by whatever method you 4 10" 45-6 -7 7.5" 4-5-6-7 4 are accustomed to using. (I use the old 4 9 " 4 -5-67 7" 4-5-6-7 4 Mattel unit, which is perfect for this type ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ it it it it *********** of work.) * Carefully trim the vacuum-formed rubber. When Koplan and Miller went rate team, and picked them in condi­ part so that you now have a complete up side-by-side, Miller on a hand tow tions that came very near to those they’ll windshield frame. In fact, this mold can and Koplan on a highstart, the results face next year in Belgium. The lift was á be used to vacuum form the windshield were dramatic; even the diehard hand- bit stronger and the wind somewhat from clear acetate. Glue the clear acetate tow fans could see Terry's hundred-foot lighter than what I remember of the to the frame and mount ontp the fuse­ advantage. Everybody who could, began Continent, but these are secondary lage. You will see how super the wind­ to rally around highstarts. And the field conditions, nothing the team can’t shield will look. If you really want to get was perfect for them: three different practice and prepare for. All three fancy, you can use very small drops of ilots used Nutter’s 100-foot Cox Hob- members are sound, experienced white glue (use a pin to apply the tiny ies Heavy Duty rubber for three long competitors. drops) on the windshield frame part of days, stretching it a minimum of five Steve Work, from Albuquerque, fin­ the mold, spaced evenly apart, to repre­ hundred feet on every launch, without a ished his Level Five LSF requirements sent screw heads. Or, you can do this single failure. If this loophole isn’t just 48 hours behind John Baxter, to after vacuum forming, placing the drops plugged before the 1979 World Champs, become the second Level Five in the on the windshield frame. When they there’s sure to be some weeping and world. He’s been out of competition for dry, paint the frame and the results will wailing and teeth-gnashing from the the last couple of years while he wan­ be very gratifying. Europeans, who simply don’t have easy dered around over the hemisphere on With few exceptions, most side win­ access to the kind of surgical tubing that an aircraft carrier as a member of the dows are glued to the outside frame­ we can buy so inexpensively here in the U.S. Navy. He’s currently stationed in work of the fuselage. (I’m talking about States. San Diego, where he attends Torrey Pine rubber and gas-powered F/F scale mod­ So that, in a nutshell, is how it went in Gulls' meetings and whoops it up occa­ els, not R/C. Since R/C models are Pensacola. I feel we picked a really first- sionally with the Macadam Madmen at usually larger, it is easier to simulate the real aircraft.) Certainly, it is much easier Steve Work New Mexico Bird of Time 11,683.7 to attach side windows in this fashion. Terry Koplan California Viking 11,309.3 However, the realism is lacking. If this is Skip M iller Colorado Aquila Grande 11,184.9 the only way you can do it or want to do Jack Hiner Illinois Aquila Grande 11,035.6 it, then trim the acetate so that it barely Bill Haga texas Legionaire 10,932.9 covers the window. Use the film splicing Bob Gill Illinois Viking 10,857.2 cement for attachment. If you are build­ Herb Smith Colorado Original 10,723.6 ing a gas model, then by all means inset Jack Hamilton Texas Legionaire 10,700.5 the side windows just like on the real John Gunsallus Florida Original 10,632.7 aircraft. If your model is large enough, Craig Foxgord California Albatross 10,481.4 this can be done by having a small Ray Hayes Indiana Original 10,364.4 backing frame built around the inside Blaine M iller Florida Original 10,313.7 edges of the window opening. The Bob Domer Colorado Legionaire . 10,271.7 acetate would then be bonded to this Tom Williams Texas Original 10,236.9 frame. On the other hand, if your model Don Edberg California Aquila Grande 10,187.1 is not large, then carefully trim the 98 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER acetate so that it fits perfectly in the frame opening. Coat the frame with several applications of clear dope. Place the acetate in the opening and coat the edges with film splicing cement. This gives a really neat job. I can remember the old days when the kits had pre-cut windshields which included the side windows in the same piece. I would say that this might be easier to apply to a model, but it is the least appealing, as far as appearance and realism is concerned. So, I would avoid this alternative if I were you. Peck- Polymers has clear acetate available at reasonable cost. Another question often asked by new modelers is how to cover light-struc­ tured models without the usual warps, etc. Well, I don’t know if there is a pat answer, since you can talk to several experienced modelers and each will give you a different way to do it. I found this to be true when it came time to cover and finish my full-size biplane. You almost have to filter through all that is said and go from there. At any rate, I’ll give you a method for doing this rather pleasant task. This method works well regardless of the size or structure of the model. Obviously, light models have to be handled more carefully, and that’s about it. Once you have completed the con­ struction of the wing and tail, while still pinned to the workboard, spray the structure with a fine mist of water. What for, you say? Well, the idea is to relieve any stresses that might have been built in. This will help eliminate warps later on. (Some free flighters do the same looks complete and neat. more than lacquer thinner. If you prefer thing by leaving the structures pinned Water shrinking seems to be more of to plasticize your own, use TCP(Tricresyl down for weeks .. . curing, so to speak, an art than people think. There are Phosphate). This can be purchased from but the fine mist of water, I feel, will just several different ways to do it. I’ll give Sargent Welch and Co., catalog number about do the same thing.) you the ones that I personally feel do the SC 15514. The address is 1617 East Ball job with the least amount of warping. If Rd., Anaheim, CA 92803. The cost used Sand all of the structures smooth, but at all possible, use an air brush to spray to be $3.25 a pint, but that price has do not clear dope them. The next step is an even, light mist of water onto the changed several times. Also, if you want what makes covering so easy, and will tissue. This seems to be one of the best to order some, you must use your make the job pleasureable. Instead of ways to do it. A regular atomizer will not company’s letterhead; otherwise, they using dope to adhere the tissue to the do as well, but if that is all you have, then will not sell you any. Some hobby shops framework, use thinned-out white glue. by all means use it. Stand back far sell plasticizers, but I’m not sure whether I usually thin it out just a bit over 50-50 enough though so that only the finest they can be used with nitrate dope. with water. Start with the bottom side mist will hit the surface. The other way is Some of you new to modeling may not and brush the glue around the outer to use alcohol in lieu of water. Alcohol even know what is meant by plasticized edges of the structures only. Place the evaporates more quickly, therefore dope. Plasticizing of dope is necessary to tissue over the structure and pull in minimizing the chance for warps. Leave prevent excess shrinking. If straight every direction carefully until you have the structures pinned down with spacers dope is used, your structure will end up the surface smooth, free from wrinkles. (see illustration), so that the air can looking like a banana. After you have In a couple of minutes, take a piece of circulate around the botton, until decided which way to go with the fine sandpaper such as No. 400, or even thoroughly dry. Use small plasticstrips, plasticized dope, thin the dope about 320 wet-or-dry, and sand the excess or equivalent, wherever a pin is used, to 40% with thinner. Some modelers prefer tissue off. This works much better than hold down the structure (see Fig. 3). This a 50-50 ratio. I always start on the bottom trimming the tissue with a razor blade. prevents the pins from denting the side first. Brush an even coat bottom and Repeat the same for the top side. How­ surfaces. top. Once this is done, pin down struc­ ever, if you are not planning to paint or Clear doping is next. Use only plasti­ ture again and let it dry throughly. Do use dyes to color the tissue, then the cized dope. Sig puts out a dope called the same with all of the other flying following addition should be observed Litecoat, which works quite well, if you surfaces. The number of coats is strictly on the upper surfaces. Once the tissue don’t mind using butyrate dope. I up to the modeler. In some cases, for a has been applied to the upper surface, personally do not like butyrate, so I very light model, one coat is enough. instead of trimming flush with the edge, never use it. If you can’t get ahold of Sometimes wrinkles appear after you fold it over and glue it to the bare edges non-tautening nitrate dope at the local have water shrunk the surfaces. This may of the structure. On curved tips, you will airport, here is a source where I get occur even though the tissue was quite find it necessary to make several slits to mine. It is called Aircraft Spruce and smooth when first applied. Why does that the tissue will fold over the edge Specialty Co., 201 Truslow Ave., Fuller­ this happen? Usually, the structure gives smoothly (see Fig. 2). The object of all ton, CA 92632. The cost of one thick way with the force of the shrinking, this is to have all of the edges of the gallon is $6.10, plus postage. It is well leaving unwanted wrinkles. To prevent flying surfaces covered so that the job worth it, and the solvent for it is nothing this from happening, put small gussets in

DECEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 99 light, as they are far behind the Center of Gravity. The same goes for the winglets. Canard construction is unusual, in The new 4th edition that for a change, you can build a heavy “ tail” . If you don’t use the dowel for the leading edge, use very hard balsa, your Guide to the because the canard takes a lot of abuse when the VariEze flies into things. The sliced ribs with undercamber are im por­ tant, so don’t cheat here. A possible R/C WOrld Only $5.25 substitute would be solid sheet with the camber warped in. Covering is a little tricky on the fuselage. Use small pieces and work $ 5 .2 5 slowly. Cover the top of the wing strake f o u r t h separately from the rest of the top, to Radio Control e d it io n / 2,000+ R/C Items Pictured, Des­ reduce wrinkles. Make sure the tissue cribed, and Priced on the bottom of the canard is well Buyers Guide attached to the ribs. Assembly has no real tricks. The only unusual thing here is no dihedral. Note the outward-canted winglets. The cowl parts are formed from 1/32sheet bent to Featuring R/C shape before assembly. Systems, Aircraft, Form the canopy over a balsa or Boats, Cars, basswood (preferred) mold. If you get a Engines, Tools, small wrinkle or two, an electric iron as a & Accessories. heat source and a cotton glove come in handy for rubbing these out. Don’t forget the pilot! My wheels are balsa with small .005 aluminum washers for bearings. These More than 200 are colored with a black felt pen. The Manufacturers small amount of trim is red. My pro­ Included totype has one coat of dope thinned 50- 50 on the flying surfaces and 2 coats on the fuselage, which gets handled most. The prop shown is the third one I made, each with more blade area. It is far superior to the small plastic ones that Indexed and were tried on this model. Keep it very thin, as it adds weight behind the Center Inform ation about more than 2200 model aircraft, cars, Cross-Indexed for boats, engines, radio systems & accessories. Easy Use. of Gravity. Balance the model at the point shown on the plan. If the canard incidence is as Please send m e_ .copies of the new fourth edition of the shown and there are no warps, it will fly Radio Control Buyers Guide. Enclosed is $6.00 for each copy right off the board. Turn can be trimmed AT BETTER ordered ($5.25 for each Guide plus $.75 tor postage & handling). with the winglets. Use thrustline adjust­ HOBBY ments for power path to get maximum SHOPS OR Total Enclosed. .. (U.S. and Canada only) climb. Canard adjustments should only ORDER be used if the bird is really out of trim. N a m e : . I’m sure you'll find the VariEze to be a DIRECT! lot of fun to fly. Good Luck. · Street Address:.

C i t y , S ta te , Z I P : . ______C/L ...... Continued from page 83 i m Return to: Boynton & Assoc., C lifton House, Clifton, VA 22024 they are sophisticated models has to be recognized. Just watch a to p-no tch those areas usually affected (see Fig. 4). covered and mark if lightly with pencil Combat plane fly sometime. The level of One last addendum. Covering the so that I can trim it properly. This piece is performance is incredible from these upper surface of a wing can be a real then white glued into place, and the finely-tuned weapons. Just a small mis­ pain. Well, it need not be. Whenever procedure repeated until the tip has alignment on these planes spells a quick there is a compound curve involved, been covered. The rest is done in the end to them. A tiny warp that takes one you have to cover in several individual conventional manner. click of trim adjustment on an R/C plane pieces, since tissue is unable to go over There you have it. Once you have to cancel will find you eating (literally) these curves without excess wrinkles. done this a few times, you will find that almost any of today's top-level Combat First, cover with one piece of tissue the you can cover as well as some of the best planes. The same applies to the high- p o rtio n of the wing w hich has the modelers. Some experts get wrinkles performance F/F machines, and yes, constant chord. The rest of the wing to also, but they’re sneaky . .. they cut the even a hand launch glider is a high- the top may have to be done bay by bay wrinkle out and patch it so that nobody performance F/F; one mistake and (see Fig. 5). Make certain that this ever finds out! · you'll eat it, let alone being competitive individual piece of tissue still has the at the contests. grain running spanwise. If not, these Peanut...... Continued from page 79 Maybe someday, model builders will areas will sag so badly that you will have be a more united group, claiming to be to do them over. They sag even worse model in aluminum! model builders, nothing more, nothing after water shrinking and doping. The wings are straightforward. Do less, and simply participating in their I lay the tissue over the bay to be everything possible to keep the tips choice of events without a label being

100 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER put on them, and without getting a down-the-nose look from others who have simply chosen to participate in other forms of modeling. WHITELY NATS STUNT CHAMP Got a call from Bob Whitely the other HP ENGINES night and we talked about everything HIRTENBERGER — AUSTRIA from C/L to R/C to motorcycles. Mixed in there was some stuff about Bob’s winning plane. Power was from the usual S.T. .46, but not one of his own as NEW PRODUCTION SERIES WITH FINEST QUALITY AND he, like everybody else, has been having PERFORMANCE EVER OBTAINED BY HIRTENBERG. trouble beating rings and rods out of his motors. Just before the Nats, Bob bor­ HP40F U/C. Placed 2nd at World rowed an ancient two-ring .46 from Tom U/C Championships. Compact Lay. the person responsible for many crankcase and light weight (10 oz) excellent Stunt engines. Bob dropped the motor in his plane and it ran perfect is ideal for U/C and free flight. right from the start, and certainly did the job at the Nats. Quite often, the winner in Nats Stunt is flying a plane that has been around for a few months, but Bob built a com­ pletely new plane for ’78. And he did it in only 28 days, from the time the first piece of wood was cut until it was ready to fly. HP40F R/C. Light weight powerhouse for pattern flying, scale, and class pylon If you know the amount of building and racing. Super idle and quick starting. finishing that goes into a modern Stunt Over one horsepower. lane, you can appreciate the 28-day uilding time. If not, then remember that this plane had a paper-and-dope finish that was good enough to tie with Ron Harding and Bill Werwage for top appearance points at the Nats. Only erfect models do this, as anybody who as seen appearance judging at the Nats can verify. HP61FS R/C. For R/C pattern and In talking about the engine problems scale flying. Long life bearings and in Stunt, Bob mentioned that he saw five rugged internal parts makes for models at this year’s Nats that were using reliable contest flying. 1.6 +· the new O.S. .45, which is a motor horsepower. designed primarily for R/C helicopters, and so features bunches of torque. Bob (silencer and glow plug not included) said all of the motors ran bitenen and All HP engines feature “ schneurle” porting, forged piston/ they all ran the same, so he'll probably connecting rod/crankshaft, double ball bearings, excellent be trying one out. craftsmanship, light weight, smooth running, optional tuned Many of you probably wonder why the Stunt guys have trouble with engines. silencer pipe for 40 and 61, parts available.______MW 777-3 For one thing, they are absolute per­ fectionists and demand smooth, con­ Available at your favorite dealer sistent power from their engines. And they don’t run them very fast, which MIDWEST MODEL explains the problems with pounding rings and rods out of the S.T. ,46's. For example. Bob wants his motors to run at SUPPLY CO. 8600 to 8800 rpm, pulling a large-dia­ 1354 Naperville Dr.. Romeoville. III. 60441 312-759-1955 P.O. Box 518R meter prop, and to do this without V overheating or changing rpm through the flight. As the .46 was not designed to tain models of K&B came to mind, but I the kind of material that I do, you have do this, it is difficult to get them to be know there are others. Write to him for a to expect the correspondence generated super reliable. list and quotes on the different rework to be just slightly strange. And so it was For you guys not wanting to bother he performs. the other day. In came a large postcard, with building your own Stunt engine, As long as we are talking about the front being solid, bright blue with Bob and I would like to suggest that you Whitely's winning equipment, his foam equally bright yellow letters spelling contact Tom Lay at T&L Model Spe­ wing was cut by J&K Custom Foam “ hahaha! hehehe! hohoho!” . The piece cialties, P.O. Box 6052, Torrance, CA Wings, 10261 Janice Lynn, Cypress, CA was from Woodvale, England, site of the 90504. Tom does very good work while 90630. Bob and I never got around to C/L World Champs, and it said: not charging outrageous prices, and his talking about their work, but if it is good “ Greetings, Dirty Dan! reputation for delivering engines on enough for him, I would imagine it is From No. 1 fan of British FAI Combat time and then having them perform as top-notch. It's wintertime now, and Fliers, who reads your column every claimed is extremely good. I’ve heard you're supposed to be building some­ month with a chuckle in his heart, and lots of scare stories about certain "e n ­ thing new, so contact J&K if yo u ’re who will enjoy it all the more now! gine builders” , but never a bad word interested in a foam wing for that new Cordially, about Tom Lay, and I did some checking model. Basil de Wazzle” before writing this. Incidentally, Tom works on several other engines besides STRANGE MAIL Not knowing the results of FAI Com­ the standby S.T. .46; the O.S. .35 and cer­ I suppose that when you punch out bat yet, I figured this to be an excellent

DECEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 101 and comes ARF. The fuselage is pre­ DID YOU KNOW THAT ___ formed of polyethelene. It’s strong and really suitable for this sport that’s cap­ Tyrone Products now manufactures more special accessories for flying model tured the imagination of both fliers and airplanes than any one else in the world? spectators at Torrey Pines. Tatone Products has the greatest selection of dock work timers, engine mounts, Ordinarily, one or more planes drag a steerable nose gear kits, speed pans and assorted items to be found anywhere? paper streamer. Your task is to touch T A T O N E rhymes with S P O M O N I7 that streamer, or better still, tear off a Shown below arp just a sampling of the many accessories that we make. piece. As if that's not exciting enough,

- the coming “Gulls Gamut” will be a · ♦ · · "combat to the death” . The winner is the pilot of the last plane remaining aloft. Only a low-cost, crash-worthy WMIt MWTS craft can justify such sport. And the Cheetah is all of that. It’s easy to put together, rolls at up to 400 degrees per second, flies in light lift, and is tough to beat. You can obtain the semi-kit for this bird from Mark Loveland, 3319 Par e r a * u o u tim er s Drive, La Mesa, CA 92041 (phone 714- 463-0841) for only $25. It includes the r.------■> CLOCK WORK TIMERS A LL S IZ E ENGINE MOUNTS PEACE PIPE MUFFLERS SYRINGE FUELERS SURGICAL TUB INC SPECIAL ENCINE MOUNTS CALUMET MUFFLERS PEN BLA00ERS foam wings, stab and rudder, Kromcote NEOPRENE TUBING TAMA MOUNTS MUFF-L-IT MUFFLERS FUEL TANK F IL L E R covering, a completed fuselage, and a SCALE INSTRUMENT M TS SPEED PANS ENCINE m ahIFOLDS STICR-A-TUBE AMA SAFETY PROP NUTS R/C STEERABLE NOSE GEAR MUFFLER EXTENSIONS ENGINE COWLS pushrod (only one needed). You have to ENGINE TEST STAMO R/C WING HOLD DOWNS RACE CAR MUFFLERS FUEL SHUT OFF VALVE CLOW PLUG STARTER NYLON SCREWS Ch ic k e n s t i c k s PROPELLERS provide the aileron linkage, leading and BATTERY CHARGER NYLON SPINNERS RAZOR BLADES ENGINE N T . D R ILL J IG ______J trailing edges, and, of course, the radio. Mike Redman conducted the annual HOW DO YOU GET TATONE PRODUCTS? Redman Rules Contest, comprised of three tasks: beer can bowling, limbo, That's a good question. It is really very simple. Just visit your local shop. A L L items listed ARE AVAILABLE to every hobby deafer and hobby distributor and carrier landing. The Cheetah fits world wide. so go rake a look. right into this scheme of things. All went well, but for the sake of "refinement” , Some hobby shops in non-flying areas may not stock our line. Or perhaps there is no hobby shop convenient to you. If such is the case, then DON'T WAIT - our next year’s bowling contest will use ORDER DIRECT fro m us. plastic bowling pins rather than beer cans. This kind of contest is a real crowd- SENO SI.00 for 25 page illustrated catalog, refundable with first order pleaser. You should hear the cheers for each successful pass. If the contest had TATONE PRODUCTS CORP 1209 geneva a v e n u e taken place 25 miles south of Torrey ^ SAN FRANCISCO, CA.941 12 Pines, the shouts would have been, "O le !" clue that we got stomped and that the along a set of the plans and they look While attending the 1978 Nats at Lake British had won. A call to the California good, being full-size and very clear Charles, LA, I came upon some in­ Flash verified this, although he wouldn’t about exactly how to make the stooge. teresting items. For example, Rae Fritz say we got stomped, just that we lost, The plans only cost $1.00, and that (1005 Revere Drive, Pensacola, FL 32505) having equipment easily the equal of includes postage. Write to: Chuck and his friends are flying the "Glass anything else there and also having Kirkland, Kirkland's Hobbyland, 5340 Kite” , built around a sleek fiberglass flying talent. But we did get beat pretty Parker Avenue, Chicago, IL 60639. · fuselage available from Rae at $25 per badly, in my opinion. copy. The polyhedral wing is 132 inches AND THEN. .. Soaring...... Continued from page 49 in span with a 9-1/2-inch chord. The Yet another postcard, just like the first, section is NACA 6410. The 36-inch side of the island. There you’ll find a from my new friend in England. inboard panels have six degrees of superb beach just below Nohili Point. "Dear Dan, dihedral at the root, while the outboard This can be a great soaring site, provided lust read your bit in August MB about 30-inch panels have 10 degrees at the the wind is right. I wished for an east­ the Trash Can Event. This has to be the break point. The spoilers, measuring ward blow, but no such luck. The hot lowest low in your subterranean writing. 1x12 inches, are effective, but 1x15-inch sands provide sufficient thermal activity You should have invented this idea spoilers would really fill the bill. The all- for lengthy soaring over the waves and before sending your team to Woodvale, up weight is 66 ozs., and you can bolt bluegreen water beyond. and put the fliers in the can too, with you ballast to the tow hook skid support if on top. By the way, I recommend that you you like. Incidentally, Rae was Contest "I bet Duke Fox would be first in line consider staying at the new building of Director for the finals which selected the to put the lid on permanently. Hotel Coral Reef, 1516 Kuhio Highway, U.S. sailplane team which will represent Yours Sincerely, Kapaa, Kauai, Hawaii 96746 (Phone 808- us at the next FAI international cham­ Basil de Wazzle 822-4481). These beach-front rooms are pionship (to be held in Belgium). UK FAI Combat Fan" well-furnished. You look between palm I have the feeling we will be hearing trees out over grass and sand to see the I thought I came a long way to reach more from this chap. I’ll let you know. waves rolling toward shore. All this at the Nats (1,800 miles), but Leonard And I don’t think Duke would put the very moderate cost. Who needs air Oakley traveled 5,000 miles . . . all the lid on me; I rather like Fox, and he claims conditioning and TV? way from C hugiak, Alaska (25 miles north of Anchorage). He brought with to be a faithful reader of this column I wish I had time to explore the rest of (although the Trash Can Event probably Hawaii, but that leaves something for him his own design, the "Caracara” shocked even Duke Fox, who is a great next time. Returning to my favorite (named after the Mexican eagle). The practical joker himself, a side of him that soaring site, Torrey Pines, I found a new wing is 126 inches, area is 960 square not too many seem to know about). breed of cat gaining popularity .. . the inches, and it has a 10 percent thick A STOOGE TO WRAP IT UP Cheetah. This bird, designed by Bill airfoil. The short tail moment aids tight Charles Kirkland saw the article about Watson, is strictly for slope soaring ... turning. The spoilers are 1-1/2x12 inches. the C/L stooge device and wrote in to let both aerobatics and combat. The foam Leonard operates this bird at 42 ozs., that us know that he still has plans available wing, 48 inches in span, covers 432 is, about 7 ozs. per square foot. He tells for one he designed years ago. He sent square inches. It flies at about 33 ozs., me that in Alaska, R/C soaring is popular 102 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER from April to October each year. They use a hi-start and rarely encounter high BY POPULAR DEMAND winds. On special occasions they slope soar. Once a year, their club, the An­ chorage League of Silent Flight, travels to within 25 miles of the arctic circle. There they hold a midnight contest. You GIANT® Scale! can guess the date of this annual event. Chet Tuttle, of Tullahoma, Tennessee, is now flying the ninth version of his “ Dreamer” . Originally, this was a hybrid derived from the Mesquite and Yankee Soar sailplanes. The wing is standard VINTAGE WHEELS PILOT GOLDEN AGE WHEELS Clark Y, of high aspect ratio (13-foot Typical of the wheels used Enhance the realism of Disc-type wheels which span). It operates at 12 ozs. per square during World War I and your giant model with this were used extensively from foot and is controlled through tip spoil­ on through the mid 1930s. easy-to-paint pilot, molded the late 1920s through ers which operate independently. Chet Semi-pneumotic tires, and from high-impact styrene. the 1930s. Semi-pneumot­ describes how they take you into tight bross-bushed wheels. 6 % " Separate goggles are in­ ic tires, and brass-bushed diameter. 517.95 pr. cluded. 4" tall. 52.95 wheels. 6 ’Λ diameter. circles by controlling the drag on the 517.95 pr wingtips, rather than adjusting the lift GNOME ENGINE CYLINDERS through ailerons. He also operates a 16- OTHER SIZES The Gnome rotary engine was among the most foot version of the "Dreamer” with long WHEELS AND PILOTS famous powerplants of the World War I era. Now flaperons. Here is a real beauty . . . an ALSO AVAILABLE you can moke % size reproductions more easily, experimental plane that testifies to with these detailed, high-impact styrene cylinders. Chet’s ingenuity and construction talent. Approximately 3” tall. 51.95 each I As expected, Col. Bob Thacker was at your deoler won't supply, order direct, odding 15% postage and handling -W r UAM-S Send 50c for illustrated catalog DEPT. MB the Nats, but this time he entered the ------original prototype Paragon (loaned by 181 PAWNEE STREET, SAN MARCOS, CALIFORNIA · 92069 Ed Slobod, its designer). The plane operates well without additional ballast We really need your support of this a spot landing contest.. . frankly makes on the CG, but it can carry three to four organization . . . items you want to share one wonder why they'd travel so far to additional pounds for coping with high with others of like mind, and your do what they can do at their own home winds. We got into the usual discussion personal participation in the activities fields. The only proof they have that of whether the Paragon’s stepped- sponsored by the Society. Now's the they've been to a meet is a Hill Country forward upper surface provides more time to become a member of the.Na­ Flyers transmitter plaque. efficiency than would a smoothly- tional Soaring Society. Write to Jim Barr, Although limitations on maximum sheeted leading edge. Some say that Box 2009, Denver CO 80201, for details. weights and wing loadings will un­ such “ turbulation” is an old wive’s tale. For those who enjoy the beauty of doubtedly be imposed, it appears cer­ Others say it's the only way to go. Phil full-scale flight and appreciate how tain that a planned event for quarter- Harris, who took first place in unlimited much we can learn by modeling full- scale aircraft can be hosted at Hill class in last year’s LSF contest, com­ scale sailplanes, may I recommend a Country next August. And. given the mented that a fully-sheeted center new book entitled Soarers, by Ferdi- scope of a contest . . . some skill events, section yields greater speed and im­ nando Gale (LSF 1745). This book des­ some tasks to perform .. . should make it proved performance. I sure would like cribes "aeromodeling” in relationship more rewarding not only for the spec­ some concrete evidence on this subject. to full-scale, then presents detailed tators, but for the modelers themselves. The best way to answer the question dimensions, drawings, photos, and a The attractive feature of the big would be to fly with one wing sheeted comparison of 24 current full-scale airplanes is their potential for scale while the other has turbulator spars, and sailplanes. This book is top quality and construction and detailing, as well as an noting which way the plane wants to well worth adding to your library. You uncanny flight realism. In that, lies the turn (thus indicating which wing pro­ can obtain a copy (via registered airmail) challenge. · vides extra lift and/or less drag). Please by sending $15 in a check drawn on any let me know if you’ve run this experi­ U.S. bank to Dr. Gale. His address is: Via Mammoth .... Continued from page 31 ment. In the meantime, rest assured that Trieste 6, 20081 Abbiategrasso, Italy although the temperature was near 94° (telephone 02-942724). · and the humidity near 100%, Col. Thac­ loosen flywheel off tapered shaft. Re­ ker was always well-dressed, wearing a move spool and flywheel. tie throughout this three-day event. By 1/4 Scale...... Continued from page 29 3) Remove flywheel key and store it the way, Stan Pfost, President of the on flyw heel magnet to prevent loss scratch built, meaning that 16 of the 20 National Soaring Society, flew an ex­ (remembering that you put it there!!). were kitted versions. (“ Highly m odified” tended-wing Paragon. Yours truly flew 4) Remove point cover very carefully were the words most often heard over an Olympic 650 in the 2-meter class. to avoid breakage by prying under the weekend.) flanges provided. Some manufacturers were well repre­ Pilotage was generally good. As a 5) Remove points (two screws) being sented. Bob Elliott “ spoke for” E.K. spectator event, though, it was boring. careful not to lose washers. Logictrol,and Jim Simpson of Name, Inc. Spectators just can’t relate to hour after 6) Remove the four crankcase bolts, flew an Aquila XL. Cecil Haga, designer hour of takeoffs, flights around the tap crankcase with plastic hammer to and manufacturer of the Legionair, takes pattern, and landings. This tedium was break seal, and remove. flying seriously, but was the only con­ relieved only by the more adventure­ 7) Lift out crankshaft, rod. and piston testant to remain seated throughout some QSA’ers. Bill Eich's slipping of his assembly. Note: hold conrod against most of his 7-minute duration flights. big T-Craft to a landing was as beautiful a crankshaft web side to avoid losing While at the Nats, I attended the demonstration as you’re likely to see rollers on crank pin bearing. executive board meeting of the National anywhere. The aerobatic performances 8) Observe position of seals, retaining Soaring Society. We discussed how the of Bob Seigelkoff and Lee Taylor were a rings, bearings, and thrust washers on Society can most benefit the member­ joy to watch. Those who didn't possess shaft. Remove carefully. ship and the R/C soaring community at the aerobatic finesse of an 9) Note: to prevent rod bearing roller large. NSS already provides a fine were applauded for their courage to try, loss, tape rod to crank web before, monthly journal of information of par­ and good sportsmanship. removing piston assembly. To remove ticular interest to those in R/C soaring. But lackinganychallenge... not even piston, use needlenose pliers to remove DECEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 103 through notch provided in cylinder block. Apply a small amount of silicon to seal lead at this point and carefully snap on point cover. BOATERS! 22) Thoroughly dry flywheel taper on crankshaft of all oil residue. Replace flywheel key (you left it on the magnet!) Start Your Marine Engine ensuring that key is fully seated in keyway. Line up flywheel and install. From Your Transmitter Replace prop spool, lock flywheel and tighten, but don’t overdo it. With 23) Apply Loctite on coil screws and install coil assembly, having routed LECTRA-STARTER point wire behind and to the left on the upper coil mount boss, and attach to terminal spade provided. Before install­ Yesterday's Daydreams Have Become Today's Reality with LECTRA-STARTER. ing upper mount screw, place ground NOW AT LAST you can start any engine from the transmitter w ith the revolutionary wire from coil between coil assembly Lectra-Starter (Patent Pending). After 3 years of development and testing we are and screw boss. Do not tighten screws. happy to announce the most versatile, powerful and practical model starting system in the world. Coil assembly should be able to move. What could be more exciting than starting your marine engine with the boat in Rotate magnet segment of flywheel the water, while you are standing on the beach. Ideal for the com petitor, sports away from coil core lamination. Slip in enthusiast and the scale modeler. .010-inch feeler gauge while holding All Lectra-Starter systems are equipped with a patented clutch assembly which disengages when the engine starts, allowing your engine to run up to full speed with coil up as far as it will go. Rotate flywheel no power loss. so that magnets are directly below coil Unit fits entirely into your model · Simple servo operation - Bolt on installa­ core. Allow magnets to pull coil assem­ tion - Completely waterproof - One evening installation time - Complete pack­ bly down to flywheel, ensuring that age includes all hardware, mechanical, electrical components and battery - feeler gauge is between coil and mag­ 25-50 starts per charge · One battery does it all. no additional glow circuit is net. Tighten screws securely. needed - Light enough for a .20 size model or powerful enough to start the largest high compression engine - Can be used to restart a stalled engine - Versa­ The following tips are from Gary tile and compact; can be transferred from one model to another easily. Isberg, the manufacturer’s chief engi­ neer. Many systems to choose from , all marine engines, O. & R.’s, Ropers, Quadras. Systems also available for aircraft, helicopters and prop drive units. Oils: use the best two-cycle air­ For prices, inform ation and literature, contact: cooled motor oils available in your area, EASTCRAFT SPECIALTY PRODUCTS - Marine Division with mix ratings of 40:1 or better. This 709 Longboat Avenue · Beachwood, N.J. 08722 · (201) 240-3882 will ensure lower carbon build-up. We We honor MasterCharge and Visa. recommend this be used as a 20:1 ratio. Exhaust system outlets: we suggest that exhaust outlets be not less than 1/2 one wrist pin clip (being careful not to 14) A very important step. To adjust inch in duals and 3/4 inch in singles for distort). Push out wrist pin, which is a for minimum end-play, pull crankshaft maximum power. If quieter operation is slide fit. Carefully remove piston ring. assembly forward (toward flywheel) and required, add a second chamber or 10) Clean (decarb) piston crown, press rear bearing tightly against rear increase the size of the present exhaust combustion chamber, exhaust port, and thrust washer. While maintaining pull system. ring groove if necessary. Meticulously on crankshaft, carefully install crank­ Proper carb adjustments: use a tach, if clean all parts with a good approved case, ensuring that retaining rings enter possible, to set up your engine. The engine cleaner. Ensure that all silicon grooves provided. engine will not go "over the hill” as a residue is removed from engine block 15) Continue forward pull on crank­ glow engine will and stop, seize, or and crankcase. As the ring is an inexpen­ shaft, install and diagonally tighten all 4 overheat. A lean mixture in a Quadra sive item, should you suspect any dam­ crankcase bolts snugly, ensuring that will result in a loss of power and rpm age or if the engine has run any appreci­ both seals are installed flush with crank­ only, provided a good grade of oil is able length of time, it is a good policy to case. used at the recommended mix. We have replace it at this time. 16) Carefully remove 2 rear crankcase deliberately tried to "fry ” test Quadras, 11) Should the connecting rod have bolts and install motor mount carefully and it just can’t be done on a lean to be removed, slip rod off flywheel end plate, replace rear crankcase bolts and mixture. This is a result of over-design in noting that the tapered outer edge faces retighten all 4. the engine. Maximum temperature will flywheel. After thorough cleaning, dry 17) Apply Loctite on mounting plate result at the best fuel/air mixture at full all parts. Liberally coat crank pin with screws and tighten firmly. load which the engine is designed to petroleum jelly and stick on the 11 18) Replace previously cleaned ex­ take. The cooling area provided by the rollers (yes, all 11, check your count!). haust system and spark plug (plug gap is engine itself is more than adequate. Just Carefully reinstall rod and previously .025 inch). al low sufficient air to enter and leave any assembled piston assembly. 19) Check all carb assembly screws for cowling you provide. In fact, a speed 12) Lubricate shaft, piston, and piston security and replace carb assembly governing device was tested, and it bled ring with two-cycle oil. Replace thrust (replacing gaskets). Temporarily plug additional air to the engine, thus reduc­ washers, ensuring that the chamfered inlet with clean cloth. ing power and speed at the governing inside edge is facing in (allows for radius 20) Replace ignition point assembly, point. So, again, use your tach to set the on crank). Install main roller bearings ensuring that points are not pitted and carb and not your "modeler’s ear” for (markings out) to present smooth face are scrupulously clean. Replace if neces­ maximum power. The pump and fuel for thrust washers. Install retaining rings. sary. Before fully tightening screws, regulator w ill take care of fuel level Check seals for wear or deterioration. rotate crankshaft so that rub block is just height differences, and you shouldn’t Lubricate seal lip, ensuring that metal over cam (high point). Adjust points to have to allow for this. side is out. If for any reason seals are .015 inch for used points and .017 for Performance tips: for those who are suspect, replace them. new ones (extra two thousandths allows inclined to experiment, a method which 13) Apply a light coating of silicon seal for rapid initial wear of rub block). could result in a power boost and added to the cylinder block/crankcase joint, Tighten screws firm ly and recheck fuel economy is achieved by adding a ensuring that you have a nice, smooth, settings. Get it right! length of tubing to the carb mouth with even coating. 21) Ensure that point lead exits an inside diameter as large as the carb

104 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER inlet. Start by adding a 14-inch length of hose or tubing, keeping any necessary bends as gentle as possible. Adjust length for maximum performance in­ BUILDING crease. This could be routed inside the fuselage and would help keep some of the dirt out of the engine as well. You must, however, ensure that the fuselage BIG? itself is clean and there is no possibility MA Y WE HA VE THE P LEA SU R E OF QUOTING of any debris being sucked into the en­ YOU ON A CUSTOM MODEL AIRCRAFT CON­ gine. and also that there is sufficient air VERSION OF YOUR OWN BIG ENGINE? entering the airframe to feed the en­ A CATALOG OF OUR PRODUCTS gine. The tube will act as a pulse charger which can provide additional fuel/air IS AVAILABLE FOR ONLY 75*. mix to the engine and utilize the spit- 77 PRODUCTS back fuel now thrown out. If working 17119 S. Harvard Blvd. properly, you will have to readjust the engine to compensate. Gardena, CA 90247 Note: you will be amazed how much Phone (213) 329-4863 (PLEASE CALL AFTER 7:00 pm. PST) unburned fuel is tossed out of a model engine. The higher performance engine you have, the higher this amount is, especially if you load the engine down on larger props. If you try the above on JOHN POND other engines, you are on your own: however, the tuned length would be much shorter than on the Quadra. Old Time Plan Service New items under test, built and de­ signed by the manufacturer, are a new The largest selection of plans in the world at the most prop adapter, shock mount, quieter reasonable prices. Each list 75c exhaust system, combination choke and air cleaner, standard mounting plate, No. 9 OLD TIMER F/F GAS and a capacitor-discharge ignition sys­ tem. All of these items will retrofit on No. 9 OLD TIMER RUBBER/TOWUNE past and present production engines, No. 9 OLD TIMER FLYIN G SCALE A through K and should involve little added cost. It No. 9 OLD TIMER FLYIN G SCALE L through Z should be emphasized that these and other articles are under test, and when they will be available is not firmed up. P.O.Box 3215 Tests made so far on the CD ignition for San Jose, Calif. 95156 our use have been less than perfect. The Phona (408) 292 3382 systems we have tested have been lacking in the ability to produce a hot starting voltage when hand cranked, something the present system does very Bros, pilots are large enough to allow the well. Jim Sunday’s column “ Overheard” addition of sufficient detail and changes Nats Soaring .. Continued from page 41 so that all models are not flown by the in the August issue of R/C Sportsman during this contest. Each flier assumed same pilot. A lot of money went into advised that a new CD system will be the responsibility of being at the right available for the Quadra, the informa­ producing these, not because the W il­ winch at the right time. No more than tion coming from a reliable source. We liams brothers thought they were going three people were called on the public aren’t the source, and a phone call to Jim to produce the hottest item on the address system to come to the flight line. indicated he couldn’t give out the modeling scene, but because they are This was generally after a flight order source, as the person requested it be modelers and appreciate our problems. change, and the delay was minor, un­ I hope the sales justify their expenditure held confidential until he was ready to intentional, and obviously due to market the device. So, unfortunately, we to the point where they feel it viable to confusion. can’t advise anyone about the product. produce other much-needed detail After flying that Thursday, the Na­ We received the quarter-scale pilots items. I know they have sold me, and I tional Soaring Society (NSS) had a gen­ we ordered from Williams Bros., and I can now spend more time on structure. eral meeting with the main topic being feel they will add more per dollar to the Again, we would like to express our how to increase the representation of appearance of your aircraft than any­ many thanks to the modelers who have sailplane fliers in the AMA. The NSS was thing else you could spend your hard- written and phoned favorable com­ responsible for coordinating the soaring earned dollars on. I've seen modelers ments and sent pictures. Keep the who could carve an exact replica of a pictures coming. Please keep this article portion of the Nats for the AMA, and it was the NSS which contacted Striegler to World War I machine gun, but when it even if you don’t presently have a CD the event. This was the most critical came to recreating the human face, their Quadra or similar product. Someone decision made in the entire Nats chain of efforts looked like an escapee from a else might be glad you did. The informa­ decisions, and one that could not have freak show. Previously, we could get tion contained is usable by the average worked out better. away without a pilot because he couldn’t person. A service book which instructs usually be noticed in flight, and on the you to use tool number such-and-such Friday morning arrived, and so did the ground the aircraft could be presented and jig so-and-so is of little use to the first moments obviously affected by as uninhabited. Some modelers didn’t person repairing the engine without tensions. The flight order had been like to be associated with playing with these professional aids, and would cost posted, and during the ensuing dis­ dolls. On our mammoth-sized models, many times what you paid for this cussion, prior to the first flight, the winds pilots and passengers are really visable in magazine. And just think of all the really demonstrated a definite preference for flight, and an aircraft without a pilot fine articles you get as an extra bonus.. . a northerly direction, so the winch looks like runaway aircraft or one that another service to the modeler from layout was reversed. This delay was had a defective seat belt. The Williams Model Builder. · significant. The first fliers were not

DECEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 105 • Colored condenser paper • Insignias and Squadron Markings on condenser paper • Camouflage c-paper, 4 and 5 color • Markings available in all scales • Black, Blue-Black, Three different silvers WINGED available as well as a wide range VICTORY of standard colors THE FIRST REALLY • Special design and custom work SIGNIFICANT BREAKTHROUGH invited IN RUBBER LU BES 's0*l£ AERONAUTICS’ • All work produced by hand P.O . Box 8679 2oz. . 50 postageJ Canton, Ohio 44711 Send $2.00 for catalogue and samples

MIKE REAGAN AND HIS A review of the scores shows only three of the 22 modified standard sail­ planes in the top 21 overall, yet in 8th PARAGON place was one of the five 2-meter sail­ AND THE TROPHIES HE HAS WON IN 1-1/2 planes; the next 2-meter ship was in 71st YEARS OF FLYING HIS PARAGON IN CONTESTS position. Texas had 20 fliers; Florida, 11; NOW WE ALL KNOW THA T FLIERS WIN CONTESTS. California, 9; Mexico, 8; and Colorado, AND MIKE ISA GOOD FLIER. HOWEVER. BEFORE 6. So that the Texans do not get too MIKE SWITCHED TO THE PARAGON. HE JUST WASN’T ABLE TO GET ANY HARDWARE ... SO. YOU CAN impressed with their performances, DRAW YOUR OWN CONCLUSIONS. please note: two of the three fliers from OTHER PARAGON WINS: Tullahoma, Tennessee, were in the top First in Open Class — 1977 A M A Nationals seven, that is District V (the one with (Pat Potega) Florida) and not District VIII (the one First in Open Class — 1977 Southern Calif. with Texas). First Place — 1978 Annual N orth/S outh Challenge Contest. (Bill Nibley) The 1978 Nats soaring contest was a L.S.F. Tournament. (Phil Harris) success enjoyed by all. The Houston Radio Control Club and the National S T IL L O N LY *59.95 Soaring Society are due many thanks. This writer routinely flies in the HRCC Span 118 in. Area 1080 sq. in. Weight 48 oz sailplane contests, and always con­ (Wing Loading 6.3 oz./sq. ft. Complete kit, w ith · precision cut parts, all hardware, strong 3-piece wing. siders the 16-hour round trip drive worth it. The AM A has identified the NSS as the cognizant organization to PIERCE AERO CO. represent sailplane fliers, and each flier 9626 Jellico Avenue, Northridge, California 91326 is encouraged to join and receive the Phone (213) 349-4758 monthly SAILPLANE journal. The trophy winners were: launching as early as some of their Jim Fitch continued to fly superbly. competition had on previous mornings, On his next-to-last flight, he got a max UNLIMITED. OPEN 35 entered and instead of an early morning, slightly and made a high bonus landing for 1. Fitch, J ...... 4001 downwind launch, they had a healthy about 97 landing points. This was the 2. Harris ...... 3843 headwind. These are the quirks of flight. No one could pull ahead of him 3. Haga, B...... 3840 nature and the breaksofa contest which on that round, and on the last round, as 4. Pfost ...... 3735 affect scores, but no one knows by how one of the last t

106 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER K/q m o d e l in g HOT STUFF! c% utettite C ity PO BOX 836, SIMI, CA 93065 Phone (805) 522-0062

H08BYH IDEA WAYHOBBYHIDEAVAYHOBBYH IDEA WAYHOBBYHIDEAVAY STANDARD, OPEN 7 entered up wires until the center section is % FAMOUS DIESELS 1. Kincaid ...... 3318 square and a 6°‘ ppsltive incidence is I AEROMODELLER PLANS I 2. Pitts ...... 3229 achieved. Check everything again, then 3. Lydick ...... 3146 fasten the struts to the inside of the outer I CATALOG - 'NEW' 2.49 STANDARD, SENIOR 1 entered center section ribs with the grooved I DIESEL HANDBOOK SPANISH LLAM 1. Richardson ...... 2641 hardwood blocks and epoxy. Remove STANDARD, JUNIOR 1 entered the line-up wires. Sheeting, hatch cover, 1. Agnew, B. and center section brace wires can now TWO-METER, OPEN 4 entered be added. Note that the center section 1. Rutledge ...... 3663 wires go through the sheeting on top of 2. Kennedy ...... 2132 fuselage (refer to pictures). They are tied M ΙβρΟΟ R PM 3. Womack ...... 1718 off at the lower locations on the struts, 225 pp TWO-METER, SENIOR 1 entered and Proctor turnbuckles are used at the 4 BHP 1. Mattingly ...... 1406 top locations. You can pull this assembly SPARES FOR M/E ,PAW.,D/C • out of line, so be careful! The struts are faired with balsa, and glassed. HOBBY HIDEAWAY DELAVAN. IL INTERPLANE STRUTS (309)244-7369 6 1734 Ag-Cat...... Continued from page 21 With all wing panels in place, make a HOBBYHIDEAtfAYHOBBYMBBAWAYHOBBYHIDEAWAYHOBBYHILEAWAY removable corrugated aluminum panels cardboard pattern of the strut. Use a for the fuselage covering. Perhaps this sheet of balsa (fairly stiff), longer than can be duplicated with sheeting. If you the distance between the top and bot­ do this, watch the weight build-up. A tom wings, as a gauge (pin it to the top Here’s few more side formers may have to be and bottom ribs near the strut attach added to prevent sagging. points). This will hold the wings apart, so How I would advise the purchase of a you can take measurements and arrive at Robart incidence meter, especially if a final strut length. Aileron slave rods are Balsarite you are like me, and can’t get everything fabricated from K&S 1/2-inch stream­ lined up by measuring alone. Bolt the lined aluminum tube, threaded rod,and Works... landing gear to the fuselage, and bolt on metal clevises. Solder a clevis at the the bottom wing. Block up the fuselage bottom location, leaving the top clevis Iron-on coverings tend to stick only to until you get a 0° reading on the inci­ free for adjustment. the surface of balsa, often leaving trap­ dence meter at the firewall. The wing TAIL WHEEL ped air, then sagging and coming should be at 6° positive incidence. Shim It’s important to make up this item as unglued. Balsarite sinks deep into the or trim the saddle area as required. Slip shown in the pictures. If you try the wood, then melts and intermixes with the elevator horn/pushrod assembly more common method used on regular the adhesive of the covering as it is through the rear stab platform opening. size R/C models (bent from musicwire), ironed on. No trapped air, only deep By checking incidence (4.5°), tram­ you will have the same experience I had. permanent adhesion. Eliminates sag­ meling, measuring, and swearing a lot, It collapsed on about the third flight! ging, fuelcreep, warping due to mois­ line up the horizontal stab in relation to After all, this thing weighs about 20 lbs., ture, and makes hard-to-reach fillets the bottom wing. When you are satisfied and the single wire arm will just not take easy to cover. If you use Monokote, the weight and side loads. with the figures, mark the location, and Solarfilm and Coverite, you must use glue in place. Maintain a constant check FINAL TOUCHES Balsarite. It takes the gamble out of on alignment until glue is dry. Using a Complete the rest of the covering and covering with iron-ons. drafting triangle or similar tool, line up attach the brace wires to the tail sur­ faces. Flying wires can be installed as per the vertical fin in relation to the hori­ IRON-ON zontal stab, and glue in place. Makesure the pictures, or if you have a better way COVERING you have 3° fin offset to the left of of doing it, go to it. A note of caution; centerline. you might be able to do away with the Begin top wing center section at­ flying wires, but do not leave off the tail tachment by temporarily fastening two brace or center section wires ... that is, "line -up ’’ wires between the cabane unless you like to pick up pieces, and struts (for and aft), at the location shown send your radio in for repairs! ~t ADHESIVE FUSING on the plans. I did this using light fishline ENGINE-GAS TANK 'WITH BALSARITE and Hot Stuff. They will hold the cabane This area will be left up to the builder. struts in position and provide a base for If you are going to use one of the the center section to sit on while you Quadra-type engines, be sure you add COVERITE check alignment. Shim or move the line­ the extra 1/2-inch ply back-up firewall! 420 Babylon Road, Horsham, Pennsylvania

DECEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 107 used to keep water cold in the refrig­ erator. The shut-off valve is an old Enya carb, well greased to lessen leakage, operated from a fifth servo. Combined engine pressure and gravity feed the spray booms. I’ve got a feeling that a pump of some sort will have to be used to get real scale effect. Whether you install a spray tank or not, be sure you pack the nose snugly with foam. This will dampen engine-airframe vibration, and really must be used with the chainsaw type engines. FLYING The first test flight was anxiously awaited by all the club members, and as the time grew near, somebody was dropping by my sign shop every day, to make sure I didn’t sneak out and try it without an audience! The First Annual Great Plane Fly-In was to be held the 25th of June, in Champaign, Illinois. I intended to show up with this plane, so the test flight day could no longer be postponed. I took the topper off my Datsun pickup, so as to haul it to the field in one piece, and as I arrived, I was greeted by the largest crowd ever as­ sembled there in some time. Even my wife, who merely tolerates this airplane business, showed up! A thorough range check was performed with the engine Now you can have GloBee leadership D FIRE PLUG: Integrated glow plug start­ running at different throttle settings. performance from a growing family of ing system for optimum power. Rheostat Everything checked out here, so next, improved model products, featuring: control matches current to weather, fuel the ground handling and taxi tests. The A %-A PLUGS: Prototypes immediately and plug choice. 0-10 amp ammeter in­ engine was then shut down, and the set new records! Get at least 1000 more dicates power output, also shows if plug whole airframe checked over to make RPM, greater power and longer life by is burned out or engine flooded. GloBee sure that nothing was loose. We topped replacing the plug in your popular %-A 2.5 VDC charger recommended. off the tank, cranked ’er up, and taxied engine with a new GloBee—at competi­ E CHARGERS: Ask your model dealer tive prices! Racing models have new about special combination offers on out to the takeoff position. high strength coil; both Racing and Sport matching chargers—2.5 VDC for the Fire Suddenly, everyone seemed to have plugs have patented spiral tip and blow- Plug and 4.5 VDC for the Stinger—at big important business behind their cars, or proof glass seal. Change heads with saving s. standard wrench. other places where cover was quickly B GLOW PLUGS: Standard line of Glo­ available. That is, everyo,ne except Bee glow plugs for larger models put LeRoy Webb, who was running the more sting in your engine! Spiral glow .. .championship camera (He used to jum p out of per­ element and leakproof seals are equal to fectly good airplanes though, so maybe the hottest engines you can buy. Racing, products for the world of that says something . . .). I advanced the Racing2, RC and Sport models available modelers throttle, and after a short run, the tail in longs and shorts. came up. I let her run on the mains until I C STINGER: Cordless, self-contained Vi-A starter delivers over 100 starts on a thought it was time (I wasrunningoutof full charge. No external battery or dan­ runway), eased in some up, and she was gling cords! Rechargeable lead acid cells OFF and FLYING! AMAZING! (included) will start the crankiest engine I had never flown a big airplane like from .010 to .051 cid. Shroud protects DIVISION OF EMERSON ELECTRIC CO. this, and I soon learned first-hand about shaft and bearings. GloBee 4.5 VDC 6000 Fernview Ave., Cincinnati, Ohio 45212 adverse yaw and flying on the wings, not charger recommended. the prop! After a few turns around the field, I checked the transmitter trims, I ended up with an O&R industrial much shorter than normal (lots of load and found that only some down elevator engine on mine, with the gas tank (made on those things), the cockpit area was had been put in; everything else was from a Superpoxy thinner can) installed open for later detailing, and the nose dead center. The first landing also in the top wing center section. No fuel was free for the spray tank installation. pointed out another thing to watch for. draw problems were encountered, as The aileron servos were installed in the Large airplanes throw off your depth the engine has a very effective hand bottom wing as per the plans, using an perception until you get used to them, primer, and a regulated carburetor. extension lead made for me by Kraft. and I flared perfectly into some high RADIO INSTALLATION This system has worked to perfection. I weeds at the edge of the field. But she After 5 years of trying to stuff radios can't claim responsibility for this idea, as handled it in true Ag-Cat style, and just into Quarter Midgets, this was like I saw it somewhere in a magazine. I had plowed right through them for an dying, and going to heaven! Gad, there’s no problems at ail with ignition noise, otherwise perfect landing. Anyway, a lot of room! After much head scratch­ but check your set-up before flying. everybody gave me a good round of ing and studying the factory drawings, SPRAY SYSTEM applause, and I went over the the pits which indicated where the CG should It seems a shame to build this airplane and had a BIG ORANGE! be, the receiver and the servos ended up and not make some provisions for dust, I made it to the Great Plane Fly-In, and behind the pilot's seat area. The battery or spray. So far, the rig I have been came home with the Best Scale Achieve­ pack is in the center of the lower wing. experimenting with is working, but the ment trophy. One of the nicer things I This had several benefits, in that the tail spray mist is still not too visible. I made received was the praise of a full-size Ag- surface control rods could be made the liquid tank out of a bottle normally Cat pilot in the crowd, who told me that 108 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER it looked exactly like the real thing to him, both on the ground and in flight. This was one of the first meets strictly for the 1/4-scalers, and Eric Meyers, of Great Planes Distrs., in Champaign, deserves a big hand for organizing and CD’ing what I’m sure is going to become ROMAIR an annual event. An interesting side note to the meet: a RETRACTABLE LANDING GEAR SYSTEMS pull test device was used to measure the static thrust of the various engines used. My O&R pulled 7-1/2 to 8 lbs., while the Quadras where pulling up to 12 on the H Hl I (I same prop (18/6). (A later note from the author indicates that the engine picked up 500 rpm after more running time. * STANDARD MAINS * FLAT MOUNTED wen) Reversible-inboard or outboard cylinders N05E GEAR I’m sure that I could stand more engine. I don’t think it would fly any faster, but pull-ups from straight and level could be made with more authority on more power. Well, there it is. Hope you will give it a try, and remember, at this scale, lots of detail can be added without seriously affecting performance. AG-CATS FOREVER! ·

Hannan...... Continued from page 74 To Eric Coates, who not only composed a new F/F Scale rules proposal to present to the FAI. but took time out from his Radio Control Contest Director duties to WIN the free flight event! To all the competitors, who. after all, are the heart of any contest, and the following enthu­ siasts who contributed support in vari­ ous forms: Fernando Ramos, Bob Underwood, Ron Moulton, Bill Dennis, Rex Oldridge, Cedric de la Nougerede, COLOR CODED HOOK UP TUBING J.D. Gillies, Bob Meuser, David Dead- man, Ken McDonough. Phil Owens, joe OTHER MODUS AVAILABLE: Barnes, M. Cowley, Hurst Bowers. Russ •F.A.I. MAINS Cylinder Outboard — Not R tvtrtibl« MAINS for PIATT FW 190-09 — with 3/16" Preformed Wire Brown, Dennis Norman, Dave Linstrum, 90 ROTATION MAINS for P-40 Tomahawk or F4U Cortoir Dr. john Martin. Russ Barrera, LeRoy •HEAVY 3/16" STRUTS on «pedal order only. Weber, and Ichiro Yamada. Helpful organizations included The English F/F c m and mcmamd 1 - Č 0 M - A T 'RetnadA bm um Scale club, Model & Allied Publications, (key am (ke tm y bed, aad enken a better /tet/tad (a SMAE, AMA, Model Builder. Model Airplane News. Model Aviation. Flyline dedyned you cap bet It uÆ be R O M -A IR . Models, Modellers Den, Sterling Mod­ ROM-AIR Retracts are featured in Dave Platt’s new kit “The DUELLISTS MARK IP*. els Inc., Los Angeles Flightmasters, Scale Staffel, M.I.A.M.A., the Cleveland Free " R O M AIR- CHOICE OF CHAMPIONS Flight Society, and probably others of HHOM whom we are unaware. And. special ® RHOMIWOIHICIS MANUFACTURING COHP. personal thanks to long-time pen-pal 92 4 65th Sn Brooklyn. New York 11219 Pete Redhead, who proxied my entry so ably. All in all, a magnificent experiment, might drop him a stamped, addressed contract to the federal government. A made possible by the cooperation of return envelope for details: Lidgard. 700 recent memo requires us to use such many. The next international champion­ Pine Ridge Drive, Perry. GA 31069. phrases as ’draftsperson’rather than ships are slated for Canada. How ’bout it, draftsman, and also to use ‘he/she’ as shouldn’t Free Flight Scale be on the Perry Peterson also guessed our mys­ the subject of a sentence dealing with agenda? tery man correctly, and hopes that people in general. It is interesting to MYSTERY MAN IDENTIFIED Clarence will author an article on rubber note that ‘he’ comes before ‘she’, which Ed Lidgard seems to have been the motors, comparing the characteristics of is fittin’ and proper. I wouldn’t be first to send us the identity of Clarence the currently available brands. Anyone surprised, though, if they change the Mather, our September column “ young second the motion? policy and make us give equal time to model builder’’. Ed sez: "Clarence and I ASK A SILLY QUESTION ‘she/he’.” were stationed at Chanute Field in 1941. Russ Brown had asked if the plural of Later we weren’t far apart in Michigan. FARMAN should be FARMEN. Warren BALLOONISTS TRIUMPH He’s a great guy, even if he gets his prop Shipp and Bob Meuser supplied similar Three Americans completed a historic at the back end once in a while.” (No answers, but Bob elaborated as follows: crossing of the Atlantic recently, ful­ doubt a reference to Mather’s canard "I really think that, in deferance to filling a challenge more than a century experiments.) Ed also mentions that he women’s lib, we should use the words old. Ben Abruzzo, Maxie Anderson.and has some Pirelli rubber of good quality FARPERSON and FARPERSONS. I work Larry Newman landed their “ Double for any interested indoor fliers. You for part of a state institution that is under Eagle II” most appropriately in France, DECEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 109 where it went. We can’t tell you. We y can’t tell them. All we know isourslogan from our first meets of thirteen years CONCEPT MODEIS ago: ‘Just like in the old days’.” i u a r ter scale Juadra power If you think these assessments of the contest are exaggerated, consider these statistics: 81 contestants entered 252 models, and achieved 743 official flights! We were fortunate enough to see Bill Noonan’s movies of the affair, and never have we seen a happier bunch of model builders. Isn’t this our real objective? TO FLY OR NOT TO FLY We have been receiving widely di­ verse comments regarding the film "To Fly” , which recently opened in San Diego, after a lengthy run in the Na­ tional Air and Space Museum in Wash­ ington. Virtually everyone who saw it in the East approved, while some who saw it on the West Coast openly disliked it. Among the yea-sayers was Eloy Marez of this magazine, while Janet Lueken staunchly supported the thumbs-down $ 179.95 SPECIFICATIONS Order direct or see your Deale contingent. Obviously, a personal in­ W in g S p a n 8 6 in . Wing Area 2100 a.i. Oealer inquiries «welcome vestigation was in order, to break the tie, Length 64 in. CONCEPT MODELS. Inc. W e ig h t 1 8 1b. 2776 Syene Rd and we donned our film-critic hat for Engine Quadra Madison.W i 53711 the occasion. Conclusion? Both factions or 60 drive unit (6081271-0355 A may have a strong case. How is this possible? Here is our guess, unsup­ ported by any really scientific evidence: MARINE VERSION The movie itself is truly spectacular, the remarkable featuring breathtaking sequences of ballooning, hang gliding, aerobatics, and a space shot. We were particularly Quadra ig n it io n e n g in e enthralled by an all-too-brief glimpse of the Navy Blue Angles, taken from above the aircraft. MADE IN CANADA However, the problem area seems not to be one of esthetics, but rather one of optics, with possibly a bit of physiology world distributor thrown in. According to the box-office literature, the film was originally in­ and developer: tended for the Smithsonian museum R. Shettler Ent. screen, which measures 75feét wide x 50 n e w ! feet high. Locally, we have quite a Pottery Road R R· 3 Vernon, B.C., Canada VIT 6L6 now available different situation. Here, the image is Telephone: (604) 542-4151 (all hours) AIRCRAFT VERSION being projected inside a 76-foot diam­ eter hemispherical surface. Thus, it home of the Montgolfier Brothers, who FLYING ACES NATIONALS appears that optical compatibility has started the whole thing during 1782. This most successful flying scale model not been achieved. Additionally, the The balloonists were welcomed joy­ meet of all time offers a very clear position of the seat occupied may ously, and the souvenir hunters had a message: Fun and good fellowship radically affect one’s impressions. Then field-day ripping away portions of the should be the prime objective of model too, certain people by nature are more gas bag. (Some actually tore sections off builders! subject to vertigo than others. Some with their teeth!) The gondola survived, “ Some modelers miss a great deal of visitors, including a number of pilots, and is expected to be enshrined along positive feedback which may be in the have reported a feeling of dizziness with the other important aviation arti­ air. Generally speaking, positive vibra­ which persisted quite some time after facts in the Smithsonian Institution. tions regarding one’s work can mean a leaving the theater. However, a warning lot, and cannot be as easily measured as sign suggesting such possibilities is In direct contrast to the leisurely pace posted in the lobby. of the trio drifting across the ocean, was a first, second, or third place.” their return voyage via supersonic Entrant Frank Scott had these observa­ Inevitably, "To Fly” will be compared Concorde. tions: “ I’ve never seen so many rubber with the original CINERAMA, which Now that the concept has been proven jobs in one place before. We went to the featured wonderful aerial photography workable, Dr. Dzus suggests that hot-air glorious FAC Nats . . . the contest by the late Paul Mantz and his crew. balloons be issued to congressmen for opened on the nicest day that we could Another yardstick might be the 360- their future junkets. Since they generate have bought. It was a memorable expe­ degree CIRCARAMA at Disneyland. We an almost limitless supply of fuel, the rience meeting, talking to, and just plain would have to rate them closely in terms savings to the taxpayers should be listening in to all of the greats, friends, of visual effectiveness, and feel all three considerable. pen-pals, and new acquaintances.” represented interesting experiences. GOSSAMER ALBATROSS Robert Thompson, of FAC Head­ Unless you are a bit queasy, we think you .. .is the name of the man-powered quarters, writing in the Flying Aces will enjoy “ To Fly", especially with the English Channel crosser being prepared News, had this view: "W e have some­ added bonus attractions featured in the by Paul McCready and crew, of Gos­ thing very precious here, something that same Rueben H. Fleet theater. Just down samer Condor fame. The pilot is again other clubs and organizations have lost, the hall is a splendid laser beam show, slated to be Bryan Allen, and the attempt and those who came from other ‘down­ and on display in the scientific experi­ is expected to take place next May. town’ outfits see our meets and wonder ment gallery is an immaculate Fleet 7 n o WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER biplane, soon to be installed in the new San Diego Aerospace Museum. SIGN-OFF Blame Randy Wrisley for this one: An airplane and a helicopter decided to go fishing one morning, at a nearby lake. The airplane asked the helicopter for some bait, but the reply was, “ I thought you brought it.” The airplane looked at r the 'copter and said, "Silly, don’t you know the whirley bird catches the worm?” ·

R/C Auto . . . . Continued from page 73 MISS SAN BERNARDINO V ^ piston was relieved (bottom edge raised Kit No. 255 ^ about 1/8 in.) at the transfer port region and took about 10 minutes. The crank was done by a friend of mine in 1973, and U'Control a 5.27:1 gear ratio seemed about right for the 20% fuel we had to run (the K&B 100 did not arrive in time). In the Expert Vik Rocers Zip: main. Bill Jianas was quicker on the FOUR NEW SEND infield, but my car was faster on the RACE READY COUPON AND Send To: sweepers and straights. After following DESIGNS 25« FOR me for about 5 or 6 laps. Bill had to push JOIN THE YOUR MIDWEST PRODUCTS CO. me in the infield to try to pass, spinning 400 South Indiana St. MIDWEST CATALOG both of us out .. . and I still came out Hobart. Indiana 46342 ahead. My problem in the main was COMPLETE TODAY! MB three blown plugs, ones I had never KIT LINE! used in the SS engine with 20% fuel, which cost me lots of positions. So, an old car and an old engine can be com­ petitive with minimal changes in the (old) Superstock class. During Road qualifying, I talked for a while with Art Carbonell. I had just watched Art turn in a super qualifying time. We got talking about tires and how we both had only a few of the right kinds of tire compounds. For the next qualify­ ing heat, Art had to use slightly harder tires on the rear (conserve the good ones), and he said to watch how the car went through the sweepers. Normally, harder rear tires would reduce traction and give a little more oversteer . . . but that’s not what happened. The car now understeered badly, and Art had to really back off the throttle to make the sweeper going onto the back straight. The track was bumpy enough that the 6:1 gear ratio and seemed to have couple of laps down. I ran out of fuel harder tires reduced the bounce and reduced power. about fifteen laps after my first pit stop. improved overall rear traction, giving Only one (Carbonell) of the Monaco One of the early crashes had knocked understeer. This is item 762 to put in World Cup drivers made the Open my fuel tank loose and a hole was worn your book. Wheel main. Thorp’s car was running in the bottom. At the end. Bob Welch Noticing who and what made the Oval well but had problems and didn’t quite won, with Carbonell on the same lap main events was quite interesting. Most make the program. And several of the coming on strong. But the really inter­ of the Expert Oval main cars had good- World Cup drivers didn’t even put a car esting thing is that Welch had switched sized tail fins. I believe tail fins help high on the track, which shows their interest to his Superstock engine the night speed stability a lot and give much better in Open Wheel car racing. before, because of the wet weather. Bob cornering speeds. The next tech article When the rain came, I thought I really made two pit stops versus three for Art, will get into this. Also, some reduction of had it made for the Oval main. At a and that was about the winning margin. max power made driving much easier. If driver's meeting to decide if the mains One of the most interesting races of you watched the cars on the back would be run, the vote was to run. After the Nats program was the Amateur GT straight, you saw that some cars got a question and a re-count, the Amateur Superstock race. The 100-lap mains, completely out of shape when going main was not to be run and the Expert especially in Road events, are really long over the bumps at full throttle. No way main would be. Ten minutes to race time at Rattey’s, and usually, as problems could they make it down the chute was immediately announced. Several occur, the lead driver usually gets a lap without backing off the throttle and racers, including myself, still had all their or two on the field. Not so in the losing lots of time getting straightened stuff in their auto trunks . .. and one amateur GT race. Several cars were on out again. My car had a 40 carb and was driver was still on his way to the track. the same lap for about 60 laps. Bill running as quick as the fastest cars, and Anyway, I only got about one or two laps Watson was the leader by a good margin was getting 56 laps per tank of fuel in before the race started. It took me at that time, but Bill Klingbeil was besides. Carbonell’s converted Road car about ten laps of the race to get the wet coming on strong. From about 80 laps and my car seemed to be the smoothest- corner down right, and got in a few on, there was only about a quarter lap running cars on the track. A rt’s car just tangles there in the meantime. Finally I separating Klingbeil from Watson. hummed along as he switched to about a was running with the leaders, but a Klingbeil would gain on Watson, only to DECEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 111 and had lost some of my enthusiasm, RAC E- W IN GS: which is really why I didn't do well in Oval. I didn’t do anything to my car the night before the main. RADIO CONTROLLED MODELS Now it’s time to back off on the race schedule and recuperate for next year. 1/12 Scale Race Cars both gas and The 2nd World Championship and U.S. electric Winners ot 90% ot the tro­ Nationals should really do it. phies at the 1974. 1975. 1976 S 1977 Nationals EXPERT GT CLASS 6 RUBBER SCALE PLANS 1 Bill Jianas (TQ) COMPLETE PLANS SHOW ALL PARTS. 2 Rick Davis BOTH WINGS. FULL STAB. PROP BLANK. 3 Jeff Rold MRP 1/12 SCALE ELECTRI^ SCALE SOURCE REFERENCES 6 CELL R/C RACE CAR 4 Eric Hahn 20Folkerts SK 2, 20 Crosby CR-4. 5 Bob Titterington COMPLETE LESS RADIO 13'Chambermaid. 13" Folkorts SK-2, 13'Floyd Bean. 15'Smirnoff Bearcat EXPERT CAN AM CLASS W inner of C la ss D 6 Cell at the^\ S et$5°° Postpaid Foreign add $15Q 1 Arturo Carbonell 1977 ROAR Nationals and many order from: CIOUDBUSTER VENTURE 2 Rick Davis other races. ______RO. B o x 2 9 2 1 3 Chuck Phelps Í Livonia. Michigan 48150 4 Ken Campbell This car comes complete with 05 type elec­ OEALERS INQUIRIES INVITEO tric motor, 6 Nicad batteries, resistor/wiper 5 Gene Husting arm type motor speed control, charger, radio EXPERT OVAL CLASS mounting plate, and complete mounting and 1 Bob Welch operating Instructions. 2 Art Carbonell (TQ) 3 Rick Davis 4 Gary Kyes 5 Georgia Campbell AMATEUR GT CLASS 1 Bill Wátson 2 Bill Klingbeil 3 Sim Picheloup have a problem passing a slower car, or a 4 Jerry Thompson pit stop would be required and Watson’s 5 Louis Przybyla pit stops were faster. With one lap to go, AMATEUR CAN AM CLASS it looked like Klingbeil would be able to 1 Mike Kimrey (TQ) Features Include: catch Watson, but again he had trouble 2 Oswaldo de la Rosa • Rugged aluminum chassis passing a slower car and Watson romped 3 Jerry Thompson • Adjustable independent front suspension home a winner by about half a lap. 4 Dana Smeltzer • Painted and trimmed Cobra II Lexan* The Expert Road main looked like it 5 Don Shreve body—light, strong, sharp looking, and AMATEUR OVAL CLASS* good handling. was going to be quite a race. Jeff Rold • Brass bushed front wheels was running great and was top qualifier, 1 B.J. Hunt • Insulated quick charge G.E. batteries less than 1 sec. ahead of Carbonell. At 2 Dana Smeltzer • Long wearing molded front and sponge the start of the main, Jeff immediately 3 Mike Kimrey rear tires jumped out to a substantial lead. But 4 Rick Perry • Heavy duty rear axles and gear after 25 laps or so and three blown gears, 5 Dennis Thomas • Charger connects to any 12VV battery and * (Qualifying Order) charges In 15 minutes Jeff dropped out. The bumpy track took • Radio mounting plate adapts to all 2 chan­ its toll, because Jeff doesn't have gear NOVICE GT CLASS nel radios problems at home. After that, Carbonell 1 George Anderson seemed to have the race his way and 2 Mike Reedy (TQ) finished first ahead of Rick Davis and 3 Phil Goodwine Chuck Phelps. 4 Jack Benas Again, I’m trying to forget what hap­ 5 Virgilio Gonzalvez pened to me at the 1/8 Nats. Actually, I NOVICE CAN AM CLASS did quite well, qualifying for all the 1 Jim Nelson (TQ) Expert class mains. But what happened in 2 Virgilio Gonzalvez the main events shouldn’t happen to a 3 Steve Delvito first-time Nationals driver. 4 George Anderson 5 Donn Bryans The race committee and organizers NOVICE OVAL CLASS had their problems, too. With the first Basic Specifications: few days running late and rain on the last 1 Sandro Tamburi 2 Diane Moody Speed: 30 MPH 50 KPH day, the Amateur and Expert mains were Gear: 16T Brass 52T Molded postponed to the next day. The Expert 3 Phil Goodwine (TQ) Rear Tires: 2’/i"D x 1%' wide program was really tough physically and 4 Mark Parus Wheel Base: 7V4" Width: 6% ’ mentally because of the delays. On the 5 George Anderson 6 CELL ELECTRIC R/C CAR LESS RADIO • COMPLETE AS LISTED »929—$120.00 first day of GT, we had one early practice session, then waited hours to find time ALSO AVAILABLE READY TO RUN WITH R /C Forum . . . Continued from page 14 ELECTRONIC SPEED CONTROL & COM- running out, so we couldn’t run our first . PLETE JOMAC RADIO SYSTEM «910 round of qualifying. That meant we had neutral position, the load will be equal to be the first at the track the next day for on both sides, so, the servo sees no part Five gas and three electric to choose our first qualifying round, then have the of it. However, in creating lift to fly or for Irom with or without radio Send 50‘ for second round and be the last main stability, most surfaces operate most of complete catalog to: event, if you were lucky enough. So, the time with a greater load on one side besides having both days extremely than the other, otherwise they would be long, there was no time to really make doing no work and would be useless. So, some changes that the car required. it can be said that a servo sees a small 12702 NE 124th Street Kirkland. Washington 98033 Then the same darn thing happened in load with the surface in neutral, and that (206) 827-8606 the Expert Road class. By the time the the load increases anytime a control Oval event started. I was really bushed movement is called for. Important here

112 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER THE HELICOPTER OF THE YEAR IN 1978

AND, THE HELI-BOY THE HELI-BOY TOOK FIRSTS IN ALL OF THESE NATIONAL TOOK FIRST AT THE COMPETITIONS . . . R/C HELICOPTER CHAMPIONSHIPS, IN * COLUMBUS, OHIO: BRUSSELS, BELGIUM, NRCHA NATS. 1978 * SEPTEMBER, 1978, FLOWN BY * SOUTH BEND, INDIANA: MIKE BOSCH, ANNUAL COMPETITION OF GERMANY. ★ ★★★★★★★★★★ ★ LITTLE ROCK, ARKANSAS: 2ND ANNUAL CONTEST IN ALL, THE HELI-BOY TOOK SIX OF THE ★ JACKSONVILLE, FLORIDA: TOP EIGHT PLACES !! 1978 R EB EL R A L L Y HELIBOY Kit: $339.95 T h e Al l -N ew B E LL 222 Fuselage kit: $89.95

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is to be sure that the greatest load picking good air, matching the motor to reduce the height, slicing off the top of encountered is well within the rated the prop, and a lot of luck, there is the rib so the trailing edge is no more capacity of the servo. Any load within something to the design. (Sorry about than 1/8-inch high. Next, cut and notch this capacity will create no harm. that, Bill!) The polywog airfoil and the the trailing edge. Pin this in place with “ Time has flow n", and this has to be it incidence set-up seem to be a perfect 1/16-inch packing under the front edge for another month. It is good to hear match for the free-wheeling propeller. so the t.e. angle matches the under­ from you, write when you can! The The large stabilizer gives it a rather tail- camber. Cut the five pieces of the spar address is 49 Colden Court, Buffalo, NY high-kicking glide with remarkable and pin them to the plan with 1/16-inch 14225. · recovery in case of an upset. I should packing underneath also. Now glue all point out that the plane has been flown the ribs in place except the six tip and C o u p e ...... Continued from page 78 successfully in rain and wind in Albany, four dihedral ones; these go in later. Oregon, in 100-degree breeze in Fresno, rubber event for nearly two years now. Fit and glue the wing tip pieces in in gray overcast conditions in Los Ange­ The idea is to provide a competitive place. You will need to pack them up les, and in ideal and not-so-ideal con­ model without the giant hurdle of with scrap, and be sure to include the ditions at Elsinore, Taft, and the Mexican carving and hinging a wooden propeller. 1/8-inch washout in each tip. Don’t border. It has performed well every­ Both Kaysen and Peck-Polymers offer forget to groove the front piece to where. What determined its moment good 9-1/2 inch free-wheeling plastic receive the leading edge. To help hold arm, its nose moment, the height of the propellers. They work very well, if not things in place, glue in the tip ribs. Now pylon, the ratio of areas, and the loca­ attach the leading edge. The center overwhelmed by too much torque. In tion of the center of gravity? I must other words, match your motor to your three pieces should be quite hard, but confess it was not intense theoretical prop. For Coupe flying, we have found the two tip pieces should be soft enough study. You might say it was intuition to bend easily. Set the wing aside and that six strands of 3/16-inch is just about derived from thirty years of poring over optimum. This gives about a twenty-inch build the stabilizer. Since this is flat- plans and listening and watching. All I motor on ten grams. (Remember that a bottomed, no packing is needed. Cut know is, that in three days tim e, a free-wheeler requires that the motor go out the ribs. The two tip ribs are re­ disparate collection of parts became a slack.) We have used both six and eight duced in size the same way as for the rather attractive and successful Coupe strands of 1/8, four and six strands of wing. Cut out the t.e. and notch it, then d'Hiver. Try one. I’m sure you will be 3/16, and four strands of 1/4. All seem to pin it in place. Pin the spar in place and pleasantly surprised. work well, with the four strands of 3/16 glue in the ribs. Cut and fit the tip pieces. taking nearly 300 turns and giving nearly In building any free flight model, it is Be sure to groove the front piece for the a 50-second motor run, but not enough best to construct the flying surfaces so l.e. Glue in the l.e. and cut out and glue torque for Coupe flying. Now to the they have time to age a bit. This seems to in the riblets on the stab only. model itself. reduce the likelihood of warps. First, cut Back to the wing. Cut out the six 1/16 Clarence Mather. John Oldenkamp, out the ribs and the four wing tip pieces. ply spar gussets. Now cut the five Bob White, and I have spent some time Sand them true and cut the six tip ribs to panels apart and very carefully sand in discussing why this model seems to fly so length. Do this by cutting off the trailing the proper bevel on each end of each well. We’ve concluded that, aside from edge, and then use the rib template to panel. Glue the two tips to the long DECEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 113 mined the top of the motor tube, sand in the down and side thrust and glue on the 1/16 ply nose ring. Cut out the two symmetrical formers, the bulkhead, and the short 1/8 x 1/16 stick for the pylon. Assemble these, as per the plans, into an open frame for the pylon skin. Glue together several pieces of 1/16 flexible balsa so you have a piece 2 inches by 12 inches long, with the grain going in the short direction. Draw a line perpendicular to one edge of this piece, in the middle of it. Glue the edge of the 1/8 X 1/16 stick to this line. Be sure that the smaller former is at the edge of the s skin. Now, gradually roll the frame down STINSON RELIANT This 23" blue, yellow and black old time flyer contains onto the sheet skin, gluing as you go. hand printed contest grade balsa, balsa wheels, alum, tubing, wire, rubber Hot Stuff is ideal for this operation. and prop. $5.25 p.p. U.S.A. F irst Class, Canada and Mexico $5.75. Catalog of k its and plans «50. GOLDEN AGE Reps. Box 13, Braintree, Mass. 02184 When one side is attached, trim and bevel the end; then roll down and glue the other side, overlapping the skin at center panels. With the center panels the rear. Trim the top so the pollywog EVERYTHING flat, the tips should rise 2-1/2 inches. ply platform can glue directly to the former. Its shape was determined by a YOU NEED With everything in place and the angle scrap I had on hand; if you reshape it, do correct, glue in the spar gussets. I use not make it any narrower. TO KNOW clothespin clamps for this; Build the Now wrap a piece of medium sand­ ABOUT rudder while these are drying. The paper around the form you used for the entire rudder is built flat. After it is dry, motor tube, with the rough side out. ADHESIVES! add the 1/32 cap strips to both sides, Being careful to keep the pylon straight extending them on to the leading and on the form, rub it along sandpaper until trailing edges. This entire unit is then the bottom fits the motor tube perfectly. sanded to a symmetrical section and set A word of caution: Coupe has a mini­ ZAP aside. If you prefer not to have your mum cross-section required, so don’t rudder mounted on your stab, the plans sand past the bottom former. Epoxy in World famous! The strong show an alternate rudder and sub­ the wing hold down dowels and add the one! The fast one! Holds rudder of 1/16 sheet construction. Either two shim pieces to the platform. Sand all up to 2000 lbs. per sq. in. one is fine, but I prefer the built-up one Bonds in Seconds. Patented your various parts and pieces, and pick clean hands applicator. Also myself. your covering scheme. Cover the tail available in ZAP GOLD, with Back to the wing again. Pin the short surfaces and the tailboom with the visible tracer. center section to your board. Pin and lightest grade tissue you can find. The glue the main panels so that each tip has motor tube should be wrapped with a 3-1/2 inches of dihedral. Now add the spiral covering of silk, lightweight fiber­ center spar gussets. While this is drying, glass cloth, or at least, heavy duty cut out the wing riblets. Glue in the silkspan. Then cover it with tissue. Glue X -30 dihedral ribs and all of the riblets. Set the on the pylon, lining it up carefully. wing aside and build the fuselage. The Cover the wing, being sure to attach the Second generation ZAP. High strength adhesive balsa used for the three main parts tissue to the undercamber of each rib. PLUS 30-sec. set time, should be straight-grained and should Assemble the nose block from five allowing adjustment of roll easily. Either soak them in hot water pieces of 1/8 hard balsa plus 3/32 ply minor alignment problems. or, if you are brave and have a well- plug. Drill a straight 3/32 nole through Higher viscosity for filleting ventilated workshop, soak them in slight misfits. the middle. I shaped the nose block on a ammonia mixed with an equal amount drill, using a file. Cut out the stab of water. The motor tube blank should platforms and epoxy them in place. be 4-1/2 inches longer than the finished Bend the top dethermalizer wire and ZIP tube, to allow for the doublers. It can be glue it in place on the stab. Cut the four wrapped around any straight form .. . rubber band hooks for the fuselage from EPOXY dowel, tubing, or fluorescent light tube. hard balsa or basswood. Scratch the Pacer's premiere The tail boom was wrapped on a surface of the fuselage and epoxy them epoxy. The five minute bonding straight pool cue. I hold the sheets in in place. Drill the nose block and install agent that means place with 2-inch wide gauze bandage the propeller. That short sentence is business. From strips, but rubber strips or old shoe laces what makes the Coupe de Plastique chemistry to would do. When these are dry, carefully unique! There are a number of thrust simplified appli­ glue the seams together. Add the dou­ bearings on the market, but I find that cation technique — the brass tube and a brass and teflon the Cadillac of epoxies. blers in the motor tube and one in the tailboom. Do not add the long doubler washer work fine. If need be, balance key to the tailboom at this time. Add the the prop with a little clay on the back of two circular formers and the snuffer the light tip. tube brace to the tailboom. The snuffer You may now think that you are ready tube and lower DT wire go in easily at to go flying, but you are not. Key your this stage. Cut out the two 1/32 ply rings surfaces!! Assemble your model, and by and carefully line up the motor tube and measuring from wing tip to tail, be sure Pacer \ the tailboom. The top of the fuselage is that the wing is square. When it is, glue Technologu & straight. Sand the joint until it is perfect. short pieces of split dowel to the under­ Now glue on the ply rings and the side of the wing next to the platform; ΊΓ/ η Resources doubler key. Notch the parts for the two at the spar and two at the trailing 1550 Dell Ave.. Campbell. CA 95008 / (408) 379-9701 motor tube. Now that you have deter­ edge. Now do the same thing with the 114 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER stab. With the rudder on the stab, you do not want any shifting to take place. Now, let’s go fly. A few hand glides are fine if you have some of that scarce long grass, but free­ wheeling props can bend shafts on hard, The Pipeline rough surfaces. If your center of gravity in filling thi is as marked on the plan and your incidence is correct, you are ready to put P.0. BOX 1868. FREMONT, CA 94538 in 50 to 60 winder turns. I use a Sterling w in d e r, w hich has a 5:1 ratio. Now A Complete Line of Boats, Hardware release the model gently in level flight. & Accessories from the Leading Watch it! You want it to fly right/right. Bend the rudder trailing edge for right Manufacturers turn and/or tilt the stab (shim up the right side). If you tilt the stab, be sure Also, Custom 1/12 that the key is still holding your stab in Scale Electric alignment. Now add 10 winder turns and Car Parts. try it again. Keep working a little bit at a CATALOGUE $1.00 time. The speed of the glide should be controlled by the incidence of the stab. The angle of the climb is regulated by Write For down thrust. As you approach 140-150 CUSTOM TUNED ENGINES turns, the plane should jum poutof your AND COMPETITION 28 PAGE hands. It is very important not to throw it or to launch it crosswind or downwind. ACCESSORIES COLOR BROCHURE If there is a bit of a wind, launch your Specialists in standard plane just to the left of it. If you practice On Our Complete Line Of enough, you should learn to pick good or throttled Cox .049/. OS1 air. You have an excellent plane, so now and Rossi .15 engines, R/C PROPORTIONAL go find the experts and beat them with parts Λ quality racing products. EQUIPMENT your plastic “ toy"! · For detailed information, including send 13t stamp ta Instructor.... Continued from page 27 Kustom /Craftsmanship ! WORLD S SMALLEST j that you aim it at the runway and fly it in. Typically, if your problem is hitting the P.O. Box 2699 ■ SUPERLIGHT DIGITAL· runway lengthwise you are probably Laguna Hills, CA 92653 landing too fast, but if you are missing I CONTROL SYSTEMS I left or right, it is too slow, causing the (714) 830-5162 airplane to wander. \ SMAL LE ST SI ZE S I like your ideas on devoting columns thick stab on the Pulsar. It would be LOWEST PRICES to flying specific airplane types, and I’ll easiest done by putting a piece of 1/4 LARGEST SELECTION! consider it in the future. Thanks for the square balsa top and bottom on the stab compliments. and Monokote over this (see sketch). ENCLO SE 50< (IN U.S.A.) OR Dear Dave: This will increase the thickness sub­ $1.50 (FOR OVERSEAS) TO COVER / have a Pulsar biplane that wanders stantially and create a diamond section. I and hunts as it flies straight, but rolls and hope this works, and if you try it, let me SHIPPING AND HANDLING COSTS loops just fine. The CC seems OK. I have know the results. tried different CG's, motor alignments (We'll back up Dave’s suggestion, and -3° to +3°, and different right thrust. Also add some documentation. Some years have tried changing the top wing from ago, when Phil Kraft's Quick-Fli design -3° to +3° in small stages. All of these dominated the contest scene, there 13400-26 Saticoy Street changes have not fixed the hunting were occasional reports of mild "fish- North Hollywood, Calif. 91605 when it is going straight. tailing" noticed during otherwise per­ Phone (213) 764-1488 The thing that stumps me is that it fectly straight flight. We particularly changes with speed in one way and remember watching this phenomenon sometime in the future, and will change changes with power in another. (Power during low inverted passes in calm the tail feathers to a diamond section, off from full speed will dive or climb, evening air, by experienced pattern for this reason, wen) depending on how the engine is set.) flier, Gus Geissinger. We forget who But it will not stay stable with high power Dear Dave: came up with the analysis, but the Are pattern contests going to become setting. Not bad at low setting, unless the conclusion was that the thin, flat tail plane is going fast (as in a dive). Thanks as rare as the snail darter (ishf What surfaces were going through a series of prompts such a question is the steady for your help, Tim Mattern, Grafton, highspeed stalls. ND. decline in the number of contestants P.S. The plane is set up very well, with At the time, we were developing the showing up at contests. At least, that is dual pushrods to the elevator and second Bigjohn design, "O.M.T." [One evident here in Texas. ailerons. Also saw many Pulsars at More Time], which was to follow the I certainly wish to take issue with the Omaha Nationals doing the same thing. prototype B ). and 7/8 B.j. [which was present set-up. Novice class pattern is a called the " Duster" and published in farce! An OPS with tuned pipe attached Dear Tim: M.A.N., September 7964). Recalling that to a Bootlegger with Rhom retracts and I applaud your efforts to cure this the prototype and 7/8-versions had guided by a custom contest multi- problem, and I must admit I've seen this similar wandering characteristics [mostly buttoned radio is not my idea of a in many Pulsars (sorry, Norm). I believe blamed on pilot inability], we put a thick Novice pattern plane. When some poor this problem is caused by having a flat symmetrical section in the tail surfaces. soul drives a hundred miles with a Veco- stab and fin on an airplane with a lot of Voila! The big ole bipe grooved like a powered Kaos in the trunk gets to a drag up front (two wings). I think the modern FAI aerobatic ship. contest, he quietly leaves his bird put. problem would be cured by putting a We plan to re-issue the " Duster” Why in the hell can’t we leave Novice

DECEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 115 object here is to give you an easy way to determine the correct length for your HANDY SANDING commercially-produced engine and pipe, not to get into pipe design. By “The taking the length specified by the engine Littlest manufacturer, you can work backwards to find the correct wave speed for your Miracle fuel. of the The formula for finding the length of the system is: Workshop" L = E V • Ever-taut, adjustable sanding fastening clip. N Patented locking principle . . Use with companion Mini-Strips in taut with finger pull. assorted grits, wet or dry. Buy ready­ Where L = Tuned length (see Fig. 2). • Fits into small and large concave made belts or cut your own (six belts E = Total exhaust timing in degrees. recesses. Over small and large beads from standard sheet). • Knife-edge sides — Sands close to · Sturdy construction. High-impact plas­ APPLIED DESIGN CORP. V = Velocity of gases in ft./sec. right angle fittings. tic. Highest quality foam rubber. N = rpm. • Padded body — Conforms to variations Tough enough for heaviest work of 738 Penn Street in surface. hobbyist or householder. From the above, you can arrive at a Sandpaper saver— Makes every square Mfs. of Mini-Glue Tips, Stay-Tray, Tee- El Segundo. CA 90245 reasonably accurate figure for various inch usable. No waste with ingenious Bar, Mini-Saw, Ruff-Stuff t Jewel Stripes. fuels arid/or props, and/or nitro con­ tent. Just remember that you cannot have more than one variable at a time to A.M.P. - Specialist in Vintage Aero prod­ get consistent results. If your engine’s COVERUP! ucts and all small models. manufacturer specifies a tuned length Sturdy, dark green vinyl covered WE C A R R Y : Vintage Aero, Flyline Models, for a given rpm, consider the nitro Micro-X, R/N Models, Classic Models, SIG, content of the fuel for that length. For binders for your valued copies of Hi-Flier, Peck-Polymers, F.H. Spokes, VL example, if it is an OPS or Rossi, the MODEL BUILDER. Gold logo. Products, Williams Bros, plus SH ARK and chances are 99.9% that their figures T E L C O CO2 engines. relate to FAI or no-nitro fuel. CO M PLETE A C C ESS O R IES : Japanese tis­ 3) All of the engines you mention are sue in silver, blade & colors, imported rub­ fine pieces of equipment. The Super ber, props & accessories, Megow, Continen­ Tigre X-60 is relatively new, and we still tal & Ideal replica kits, books. Peanut balsa, plans, and morel have not received the pipe for this engine from Italy via World Engines. CATALOG $1 -THIRD CLASS RETURN. 56 pages of the finest models & supplies; in­ Our only observation with the X-60 so dudes F R E E Peanut plana plan. far is that it takes a lot of running to come Send S.A.S.Ě. for current price list up to its full potential. It’s hard to say what you can expect from these engines, AIRCRAFT MODEL PRODUCTS except that you mention blowing up an BOX 318, SCITUATE, MASS 02066 OPS .60 on 40% nitro. With this much nitro and the pipe, I’m afraid you obtained the results to be expected! restricted, it will be obsolete when the Consider that in C/L speed, the engine competitor moves up to the next class. rarely runs for more than 15 seconds at Proposals are being made now to the full power. At 200 mph, it takes less than Only $4.95 each, two for $8.95, three AMA which should help this situation, 9 seconds to make 6 laps on 70-ft. lines. for $12.95, four for $16.95, or five but I’d like to recommend that you Consider also that it is not unusual to for $20.50, postpaid in the USA. Out­ submit a proposal to the R/C contest rebuild a racing .60 or .65 several times to board, detailing your ideas which may side the USA, add 90 cents per binder. get one flight with a full pipe and high be incorporated into a final proposal or California residents add 6% sales tax. -nitro! Now, think about what you are rule. The advancement system is the asking your R/C engine to do. If you fly primary problem, as it advances people NOTE: One binder holds 1971 and 1972. for only 3 minutes with a full pipe on 40% Use one binder per year for 1973 to present. out of Novice too slowly and into nitro, you’re asking a lot of an engine, Masters too quickly. · (For UPS delivery, add $1.00 per binder) much less the glo^v plug. Unless you are willing to invest about $50 in special MODELS Fuel Lines . . . . Continued from page 61 phenolic retainer bearings, if available, to “ light off” than alchy. My notes from and another $50 to $100 in a titanium BUILDER 1968 have a notation “ use 1650 ft./sec.” . connecting rod that utilizes caged 621 W. 19th St., Costa Mesa, Ca. 92627 Since I was totally involved in speed in needle bearings, don’t expect any en­ those days, and “ go fast” was the word (I gine presently available to stand up to events for novices? once ran 88% nitro, 10% lube, and 2% the rigors of high nitro fuels and several I admire Expert and Master-type fliers, propylene oxide), let’s assume this minutes of flying time on the pipe. The but don't like them in Novice. Three figure related to at least 70% n itro only engine I know of that can possibly wins and they move up . . . baloney! content fuel. stand “ the gaff” is the special TWA’s, as Here in Texas we have ten-year novices. built by Glenn Dye of Performance Looks like the manufacturers, if no O.K., the most important point to Model Engineering. I understand that one else, would like a broad-based remember is that the length of the pipe K&B is due to release a new rear- Novice event. Oh well, at least you will is measured from the face of the piston exhaust, piped .61 soon. As it is also get this one letter this month. Happy to a “ mean” point of reflection from the designed by Bill Wisniewski (as was the Flying, Ben Carrett, Brownwood, TX. rear or baffle cone. This mean point is original TWA), perhaps it will be capable Dear Ben: approximately one-half of the complete of much more, but my guess is that, in I don’t think they will become that rear cone; that is, if it was measured order to be commercially marketable. rare, because in some parts of the from its major diameter out to a sharp 15% nitro fuel will be about the upper country, pattern contests are on the rise. point (see Fig. 1). limit. And even then, be prepared to I do agree that perhaps the equipment All of these dimensions can be deter­ replace parts. The K&B 6.5 is probably used in the Novice event is becoming mined by drawing the complete system one of, if not the most powerful engine too sophisticated, but the other side of out on paper, or they can be calculated for its size ever produced. But be pre­ the coin is that if the equipment is by the formulas given later on. Our main pared to rebuild it if you run lots of nitro, 116 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER even for short periods. For $400 to $500, most any good manufacturer could give Authorized- FA CTOR Y A UTHOFt/ZED SER VICE you something that will GO for long periods .. . but obviously, they would (Radio FOR ALL OF THE FOLLOWING BRANDS not sell many. Ace* Cannon Cirrus EK Logictrol 4) Considering the engines available C o n t r o l Pro Line* Mathes* RS* Micro Avionics today, and there are some darn good Royal Orbit D & D World Engines ones, my guess is that you should tune s e r v i c e Simprop Kraft* JoMac them for about 13,500 rpm max on the ground, which will give about 15,000 to 'ALSO WARRANTY SERVICE 15,500 unloaded in the air. 5) As we've said before, if you aren't EXPERT SERVICE ON ALL BRANDS getting at least 10 flights per glow plug, you’re either overcompressed, running Chuck Moses Factory trained technicians with over too much n itro , or both. (See my Don McCarthy 15 years in Radio Control Electronics. previous column with more data on this and a special head design.) My advice is Hours: Closed Sun & Mon; Tues - 10 am—8 pm; Wed —Fri · 10 am—6 pm; Sat - 10 am—2 pm run no more than 5% nitro! The pipe is already giving you a bunch more rpm. (714)639-8886 915 N. MAIN ST., ORANGE, CALIFORNIA 92667 Unless you’re willing to rebuild your engines regularly, back off on the head compression and/or nitro. i NEW KITS OF WORLD 6) The key to this one is, “ I'm a sport CLASSIC AIRCRAFT flier.” Like the man said, “ Back off, Charlie ... or Horace!” Your OPS .60 is one of the finest engines available, but don’t expect more than it is capable of giving for the price you pay. Pylon racers found out in a hurry what we’ve known in C/L speed for years; "If you want to go fast, how much money can you spend?” Maybe I’m mellowing in my ap­ Hold all models any position for BUILDING­ proach, but why not get everything COVERING - GLUEING - TRIM MING-REPAIRING working smoothly on no more than 5% COCO moon peoouct/ PO Box 14078 nitro fuel. Make all necessary adjust­ Omaha. Nebraska 68114 ments, such as head shims for longer

plug life, prop blades balanced, thinned, eee you» Dealer j etc., until you can fly at will with abso­ lutely no problems. With a full pipe/ able to throw a spark at least 3/16 of an muffler system you’ll still be going inch in length. This will be impossible if stronger than BTP (before the pipe). Ifall your condenser is faulty, so if in doubt, else fails, set up your engine on the change it and try again. bench and adjust the pipe in or out, So far, we have discussed the engine holding it with a heavy glove or rag, to that refuses to run. But what about the get the optimum length. The point is, get engine that does run, but is obviously consistency first, before going to higher not performing as it should? This could nitro. And if you do, only make one be defined as engine missing or erratic change at a time; i.e., if you add nitro, firing. Sometimes, an engine will refuse don’t change the prop or raise the head to go into a two-cycle mode when the at the same time. Make a test run first, needle valve is leaned out. And there are and if it wipes out the plug, then add a engines that will run smoothly at slow head shim and test again. More than one speed, but miss like crazy when asked to variable will not give conclusive results.· operate at high speed. This can be a Send 25< for catalog of all FLYLINE'S classic kits BERNHARDT frustrating experience, but in reality, the See your dealer solutions are usually quite simple. Let’s NOW • Ignition Troubleshooting ... cont. examine them separately. FLYLINE MODELS, INC. There are some brave individuals who 1) Engine w ill start but misses at all tmoo«i> avi ■ t * “ «»*» vt»anpA n o ji will check for spark by placing their speeds. " t il A'» MM finger on top of the spark plug while Possible causes: cranking the engine. “ Yup, I got a A) Contact points are dirty. C) Movable point is floating at high B) Contact points are loose. Check spark,” they say. Big deal! It only proves speed. the condition of the riveted tungsten they have a lot of insulation at the end of D) Spark plug is dirty. point on both contacts. Sometimes they their finger tip. I jump like hell when I try E) Batteries are weak. it! Actually, this is a poor test and proves get loose and have to be reriveted. This very little. A good coil operating with a is a difficult trouble point to observe, but Conclusions: At low speeds, an engine is defective condenser will give every it is a real source of trouble, especially in operating at low compression cylin­ indication of a good spark when tested original old timer engines. der pressure through which a weak with the finger method, butyourengine C) Spark plug is dirty. spark can operate across the spark plug will still refuse to run. The reason is that Conclusions: At least 90% of engine electrodes. However, at high speed, the the coil produces the spark, but the missing can be traced back to a faulty pressure within the cylinder increases condenser is a good deal responsible for electrical component. and requires more electrical force to the length of the spark. If the spark is not 2) Engine runs fine at low speed but generate a spark at the plug. A miss strong enough, it will not jump the misses at high speed. occurs when the fuel/air mixture is not distance between the spark plug elec­ Possible causes: ignited by the spark plug. Inspect for trodes, especially under compression. A) Contact points are slightly loose. one or more of the above causes. An For reliable performance, you must be B) Condenser is faulty. additional cause of engine miss only at

DECEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 117 their drivers. Ron Erickson, fastest qualifier during Wednesday’s activities, FREE FLIGHT was having no problems winning his JeBoli HARDWARE three qualifying races. Les Ruggfes, ^^^TooLS^cccstomci^^aeciaiOf^CAWNG· driving his Miss Super Test, also won all is three of his races quite handily. Another WINDING T BALSA boat, Bill Hornell's Thriftway Too, also d'Nuts!” N 0 0 K 5 STRIPPERS gained the finals with three heat vic­ unlikitkd to peanut 19" and 39" lengths tories. However, Bill really had to work ALL MAUD B/C SALES C P T I I

Low««t |irtc» i uny*r>»m for one of his heat wins when he jumped l yaar m i • • rv t c ·! dETEX:· Zrv,i^ EIRELE TBW! •«condition*! ayat···» the start and then proceeded to lap the a l l * μ » ο w/c stwvict c p >t o > entire field to take the win. The fourth £*parlanc*4 Spaelallatai EQUfEØUPE NUB D T K IT Í Ě O nlt, "»ere, řrollna, RADIAL , boat that looked impressive reaching E-K anil «raft ENGINE MOUNT ^ 0 PITS: FORSTER 39, K 99 u* Hour tum aroiavl· Ø 3 3 PON 0'T_ TORPEDO, OAR 19 AND 23 the final was the Slo-Mo-Shun V driven for Info 4 prJcaa contact uai CATALOG % 1.00 by Bill Osborne. The M o V is now in its cJIM CROCKET REPLICAS fifth year of competition, and still rlrF in i T^AgOCO *^- remains a constant performer. Filling PHONE 716*33-6623 1442 N. FRUIT AVE. l 49 COLDEN CT. BUFFALO. N Y 14225 out the top six boats for the final were FRESNO. CA. 93728 the Miss Budweiser, driven by Roger “ Czar” 'N ew ton, and the Miss Techni­ color, driven by Mark Chamberlain, a Caar«« I » » m u junior engineering student at the Uni­ RUBBER STRIP versity of Washington. FAI Rubber: Contest proven after four Prior to the running of the final, two years. Used by leading fliers W O R L D ­ consolation races were conducted. In W IDE. Made in USA. Endorsed by the the second consolation race, Steve best US rubber fliers. Maggard brought home the Miss Sha- nandoah in front of Rocky Fridell's Sizes: 1/4", 3/16", 1/8", 3/32", 1/16" Squire. They were the only finishers in by 1 mm thick (.042). this six-boat field. The first consolation Spooled. Gross weight approx. 1 lb. race was an excellent contest between PRICE: $9.10 per spool, incl. postage. the Ham m ’s Beer, driven by Dennis More than 1 spool, 50ť less. Caines, and the outrigger Pay ’n Pak, driven by Gary Jensen. Both boats NEW PIRELLI SPECIAL CONTEST X battled side-by-side for 4-1/2 laps be­ R U B B E R Wl LL BE IN STO C K SOON! fore Jensen ducked inside a stalled boat fua» n < m t lr·· ■ ·|·ι·ι·» I lil» ·· ·»« A » · MV HI C lIlllC 111·" CLASSIC ERA MOOUPIANS in the last corner and took the first place lilt II II III m u nil · 355 Crantf j|„ | Γ. A.I. Model Supply honors. Dennis followed in second, and unii nmi κω nu It Bidford Ohio 44146 Í* P O Box 9778 Butch Melewski, piloting the checker­ Phoenix, Arizona 85068 board Bardahl, took third place. With the conclusion of the consola­ high speed is a weak spring that operates that we discovered a minute hole in the tion races, the stage was now set for the the moving point. This may prevent final of the World R/C Boating Cham­ proper mating of the points at high fuel line, which prevented the engine from drawing fuel. pionships, R/C Unlimited division. With speed. The correction for this mechani­ all six of the top qualifiers running 30 cal weakness would be to install a helper Another mechanical point to check periodically is the sealing quality of all seconds prior to the race start, Gary spring or replace the original spring with Jensen pulled the alternate Pay ’n Pak off a stronger one. Engine miss can occur if gaskets. You would be amazed at the power loss derived from a leaking head the course as the finalists jockeyed for the outside surface of the spark plug is starting positions. Striving to gain the exceptionally dirty. This will cause the gasket. This holds true for the spark plug gasket, too. advantage of being first boat into the spark to travel on the outside surface of first corner, Ruggles, Newton, and the spark plug instead of across the elec­ One last mechanical thing^you might check is the direction of the fuel jet in Chamberlain jumped the start. This left trodes. Sometimes this may be clearly Erickson as the first legal starter, fol­ seen on a dark night. the needle valve body. If the body has a single fuel jet, it must be positioned to lowed by Hornell and Osborne. Ron was The following sums up the essentials face in the direction of the air flow. This forced to swing wide in the first turn to of a good ignition system: means that as you are looking at the avoid the boats that were early, and Bill 1) Sound wiring of the shortest needle valve body through the intake Hornell hung his twin K&B 6.5-powered length. tube, the jet hole would be on the side Thriftway Too right on the buoys to take 2) Fresh batteries, properly con­ opposite. If the needle valve body has a slim lead down the back straightaway. nected. two fuel jet holes, it should be posi­ Although Ron made some strong chal­ 3) Clean contact points. tioned so that the jet holes are facing the lenges during the next 4-1/2 laps, he 4) Clean spark plug. sides of the intake tube. · wasn’t able to overtake the Thriftway 5) Proper contact point and spark Too and had to settle for second place plug gap. behind Bill’s fine running twin-powered 6) Reliable coil and condenser. Power Boats.. Continued from page 35 machine. In third position, Bill Osborne Earlier I stated that at least 90% of drove a very steady race to prove that engine missing can be traced to some­ mix allowed for 6-boat heats during the the old Slo-Mo-Shun V is still a competi­ thing faulty in the electrical system. This three qualifying heats, leading up to a tive piece of equipment. Les Ruggles leaves 10% falling into the mechanical winner-take-all final heat for the top six finished up in fourth place, followed by category, however, the symptoms will boats and two consolation races for the Roger Newton and Mark Chamberlain. usually show up as a balky engine that next dozen unlimiteds. With a field of All six boats finished and returned to the refuses to start. I once worked over an 35, gaining access to the six-boat final pit area under power. That in itself is hour with a friend trying to get his pesky took both good driving and some good quite an accomplishment. The exciting, engine to keep running. It would run luck. Observing the different models well-raced final heat was a fitting climax fine on a prime, but refused to keep working their way through the qualify­ to the 1978 World R/C Boating Cham­ going, no matter how much we opened ing heats, this writer was especially pionships. the needle valve. It was only by accident impressed with four of the boats and The Planning Committee wishes to

118 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER express its sincere thanks to our primary race sponsor, John Perry, and a special SCALE PLANS thanks to our event sponsors; Dumas Boats, International Products, Octura BY Models, and K&B Manufacturing, for their contributions. · WESVBURG > l/24th size 1/2" * 1 ft. No. sheets Price Douglas 0-35/B-7 1 $3 25 C ounter...... Continued from page 8 Douglas XO-38/XB-7 1 3.25 1 / 1 2th size: 1" » 1 ft. engine bottom exhaust is also $19.95; Curtis A-8 Shrike 3 $8 25 and QM-UBT, upright engine, bottom Curtiss Qulfhawk 1A 2 550 exhaust is $21.50. Curtis 0-1B/A-3 Falcon 3 825 Curtiss XP/YP-23 3 825 Who? Where? Try your local shop Czech Avia B-534 2 5.50 first; if not in yet, contact Quarter Davis D-1K 2 5.50 Headquarters, P.O. Box 12321, San Douglas 0-25C 3 8.25 Douglas 0-31A/0-31B 3 8.25 I rancisco, CA 94112. Douglas 0-31C/Y10-43 3 8.25 Douglas 0-38/0-38B 2 5.50 Price includes handling and Douglas 0-43A 3 825 first class mailing within the Douglas 0-46A 3 8.25 Airplane modelers should not over­ Fokker D-XVII 3 8.25 United States. Canada, and Mexico. look this one just because it says “ Octura General Western Meteor 1 3.25 On foreign overseas orders, Travel Air 2000 2 5.50 calculate postage based on Models" on the package . . . this is a Waco ATO Taperwing 2 5.50 80 grams per sheet. handy item for all drivers of engine- 1 /I0 th size: 1.2" - 1 ft. powered models. It is an inexpensive Berliner/Joyce P-18 3 $10.50 No rolled prints — folded only. fuel line clamp that will keep that liquid Curtiss Hawk Ρ-βΕ 4 $1050 All prints are blackline — 30 x 42 inches Flat CR-32 3 825 gold from dripping out on the ground or Great Lakes Trainer 4 10.50 into the carburetor and making you lose Hawker Fury Mark I 4 10.50 a heat because of a flooded engine. Hawker Taper Wing Fury 3 8.25 PETER WESTBURG Hawker Persian Fury 3 8.25 The clamp is precision molded out of 834 Seventh St., No. 6 Monocoupe 90A 2 5.50 Santa Monica, Calif. 90403 what appears to be reinforced nylon, in Sparmann P-1 2 5.50 ivory color. The serrated ends will not slip off any oily fuel line, and they will not pinch through, as some of the metal hemostats often used for this purpose will do. The locking clips on the handle end are spaced so as to permit clamping different thicknesses of fuel lines. R / C P L A N S / Only 75

DECEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 119 New From Astro Flight nSTRO FLIGHT me AUTO CHARGER WITH PIONEERS IN SILEN T FLIG H T 13377 Beach Ave., Venice, CA EQUALIZER CIRCUIT • New fast charger for R/C electric cars has dual charge rate for 4 or 6 cell systems. • Equalizer circuit tops o ff battery pack between races for maximum performance. • Overnight use of equalizer recommended on new battery packs. • Equalizer helps eliminate possibility of reversed cells due to any weakening of a single cell within the pack. • Built-in pilot light gives positive indication of circuit function. Also available — our new stock class ROAR 05 racing motor with special high temperature insulation for maxi­ mum reliability. This new electronic motor Motor Control control provides on-off opera­ tion of the electric motors in your plane, boat or car. The Our world famous Astro 15 unit, controlled directly from and 25 motors are now even your radio receiver, eliminates better. New, more powerful the need for an extra bulky, magnets and low resistance expensive servo. windings increase power 25% A voltage regulator powers over old systems. The new '79 the radio receiver from the models of these top-quality all motive battery, eliminating ball-bearing motors are dressed the weight of the receiver bat­ up with black anodized end tery. Electronic circuitry auto­ bells and prop adapter. matically turns the motor off when the battery gets low , assuring positive control. them. “ Multi Charger” will work off 117 VAC The first is 15-minute Quick Cure The calendar is 10 inches wide by 18 60 Hz, and can be ordered for 220 VAC Epoxy, in economical 4-ounce (mixed) inches long, in a vertical format, with 50 Hz operation. Price of either is $24.95. containers. This adhesive dries clear, plenty of space for notating dates to Contact your dealer, or order direct sands easily, and is fuel-proof and remember. The full-color prints of the from L.R. Taylor & Co., 20831Vi Roscoe flexible. It comes in easy-to-use squeeze models are on enamel-coated semi­ Blvd., Canoga Park, CA 91306. bottles that let you meter out exact luster paper, suitable for framing once * * * amounts as required. the month or year has passed. The older product which you should Topless, Topless, Topless!! Cost is $4.95, plus 75c for shipping and take a look at is the "Z ” Pliers, as used to Now that we have your attention, we handling, direct from Photography by •shape the ends of 1/16-inch music wire can tell you about Delta Manufacturing's Fred House, 9032 90th Northwest, Oak pushrods for easy and reliable insertion “ Super J” 1/8-scale R/C race car, shown Harbor, WA 98277. Washington resi­ into servo arms and control horns. This is here in topless form so that you can see dents don't forget to cough up that extra an economical way of making that all the goodies. 5%. needed connection right where you The Super ) and its companion, the need it. Panther, are just part of what is described Both are available through mostshops Second only to the quality of the in great detail in Delta’s 1978 illustrated and distributors. · batteries in your radio system is the catalog, available for $1.00. In addition charger that you are reviving them with. to exploded views of these two cars, the MRC Hawk . . Continued from page 23 L.R. Taylor & Co. has introduced its catalog lists chassis, bodies, disc brakes, "M ulti Charger” , designed for con­ clutches, engines, decals, tires . . . in glossary of airplane and radio parts, and venient and safe simultaneous charging fact, just about everything needed by extremely clear drawings of pushrod of two transmitter and four airborne the beginner and expert in this popular installations and clevises, horns, etc. This batteries. part of the R/C hobby. type of basic information, which so This multiple charger features trans­ Delta equipment was used by a large many of us take for granted, is extremely former isolation for user safety, and percentage of the successful racing important to the novice, and can make a independent circuits for the protection drivers in 1977, and continues to build an difference in how long the learning of the individual packs. With the addi­ enviable record in 1978. You can obtain process is going to be. tion of the proper plugs for your system, your catalog direct from Delta Manu­ Step-by-step instructions are given, it can be used with nearly all radio facturing, 27 Race Car Court, Lorimer, IA including the all-important proper systems on the market. 50149. positioning of the elevator and wing The charging rate for the receiver relative to each other and to the fuse­ packs is 50 MA. Transmitter packs will be * * * lage. Control movements, both di­ charged at 55 MA if they are of the 6- Custom Model Products, 27 Fulton St., rection and degree, are discussed and volt, 5-cell (Kraft Sport Series) type; 50 Brockton, MA 02401, whicFi offers a wide explained, and recommendations for MA for the 9.6-volt, 8-cell (most used) variety of modeling products, has one flying are clear and concise, including: types; and at 45 MA for the Cox Sanwa new one to tell us about, and an old one “ Before attempting to fly your model, it kind Which uses 10.8 volts, 9 cells. The to remind us about. should be carefully checked by a corn-

120 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER SAILPLANES LOVE ELECTRIC POWER

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

ASTRO PLIGHT inC. PIONEERS IN SILENT FLIGHT

13377 BEACH AVENUE, VENICE, CALIFORNIA 90291 Send SASE for FREE Catalog petent, experienced model pilot and its exceptional external finish. It is not all prop nut. Since it has a right-hand initial flight made by that pilot." external though; Enyas have established thread, the starter can spin it off, espe­ A separate "Safety Instructions” a good reputation as being long-lasting cially if you flood the engine. The front booklet is enclosed, which explains R/C and reliable. half does have a hold through which a in general, frequency sharing, the AMA This one uses a bronze bearing, lap­ length of wire can be inserted for extra Official Safety Code, and many do’s and ped piston/cylinder, and is received tightening which has worked so far for don’ts to assure the safety of your with an Enya muffler. The carburetor m e . . . I use a starter and have yet to spin investment, yourself, and others at the appears rather small in throat area, the front off. And of course, it will not flying field. especially if you are used to looking at create a problem for you chicken stick There is another sheet of safety in­ racing .15’s as I am, but it is ample, and operators. It works, though if it ever structions for the engine, which lists all easy to adjust. Idle is controlled with a needs replacement, I would consider the precautions that new modelers mechanical screw stop that sets the one of Carl Goldberg’s inexpensive should be told of, and some that us more opening, and a screw-adjusted air bleed “ Snap-On” spinners. experienced should be reminded of on the front that requires a one-time Feeling as I do that this type of air­ from time to time. In fact, safety in all setting. The weight of the engine is 5.2 plane can also be of value to otner than a aspects of the R/C hobby is often ounces, and it is rated at 2,000 to 13,000 rank beginner, as already explained, I mentioned throughout all the instruc­ rpm. opted to attempt a slight customizing tions that come with the Trainer Hawk. The Enyas in my Trainer Hawks have job on one. No attempt was made to We feel this is a step in the right di­ been trouble free. They start easily, change the basic design or flight char­ rection, since there is already some requiring only one flip of the prop with a acteristics, merely to make it look a little concern on the part of the industry and finger over the intake, and a quick blip different from the stock Hawk, and the serious hobbyist since the arrival of of the starter. With the Enya muffler sup­ possibly prolong its life somewhat. the department store ready-to-operate plied, and still rich enough to leave a The first step was to apply some of Top R/C models. We are rightfully con­ trace of smoke, they swing the Top Flite Flite Models’ new Econokote to the cerned that inexperienced purchasers 8x6 supplied at just over 12,000. This is wing and tail assembly. This was rpy first will shoot us down from the schoolyard enough to get the airplane off in 50-60 experience with this material on foam, adjacent to the flying field, or that they feet and climb out quite sharply. The and it went as well as the Econokote might hurt themselves or nearby prop­ airplane will climb vertically for a short instructions say it should. Using slightly erty, giving us all an undeserved black period, and will loop out of level flight less heat than is required for Monokote, eye. The MRC instructions do their best without any strain. It is definitely which is good because high heat will to warn and control newcomers without enough power, with a bit to spare for blister the foam, Econokote goes on scaring them away from the hobby. those times when a situation calls for it. easily and adheres well. Complete The engine furnished with the Hawk is The spinner is of good general quality, instructions about applying this type of the popular Enya 15-111, a sport class but will be a problem for those who like covering is not the intent here: suffice it engine which, if you are familiar with to use an electric starter. It is a two-piece to say that you must first sand the foam Enya engines, you w ould recognize spinner; the front part screws on after with 400. and then 600 grade paper, and immediately by its lines and by its installation of the back half, prop, and then vacuum it thoroughly. This is

DECEMBER 1978 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 121 mended for foam can be used. If you insist on using something from the SAIL CONTROL WINCHES corner hardware store, be sure and test it first on a piece of scrap foam cut from inside the fuselage. It may contain solvents or propellants that will attack foam. But the painted one looks original. Though I didn’t use it, there is a new material available from Midwest Prod­ ucts Co., called "Styromate Sealer” , which can be used as a paint base on foam. Proper application and sanding, W-1 . . . $59.00 W-2 . . . $119.00 then painting with epoxy or poly- uethane, is supposed to result in finishes • Custom R/C design for all boat sizes · Power - 40 in. lbs. »Travel resembling those seen on wood surfaces. time · 5 seconds »Voltage - 4.8-6 (W-1) »Size -2x2x5 inches. I added some trim and windows, also The Probar W-1 is mechanically operated by a separate, neutralizing cut out from Econokote, and compared the weight ... a difference of 1-1/4 servo. The Probar Propo W-2 is designed to plug directly into the receiver, ounces- between the covered and and requires no extra batteries. Specify Kraft, Futaba, or no connector. painted Hawk, and the completely stock Both winches are fully assembled and tested, ready to install. A ll mounting one. Flying weight of the latter is 2 hardware, switch pushrod (W-1 only), and winch arm blank are supplied. pounds, 8.5 ounces. The Enya .15 didn’t STAINLESS STEEL HARDWARE: MISCELLANEOUS ITEMS: seem to notice the extra weight, nor was Turnbuckles. Chainplates, Goosenecks. Sheet exit guides, 3owsie, there any noticeable difference in the Boom vang pivots. Pad eyes, Tangs, Rudder posts. Mast head flying characteristics of the Hawks. Deck cleats. Boom cleats, Rigging wire, fitting. Dacron sheet line. Not for reasons of looks, but I also Dealer inquiries invited. changed the engine mounting slightly. It P R O B A R DE$IGN P.O. BOX 639 ESCONDIDO, CA. 92025 uses a plywood beam mount, epoxied to a plywood firewall, both of adequate important, as any dust left on the surface dissolve the foam. The photoshows how thickness to securely hold the engine or in the pores will result in imperfect the cloth can be applied neatly. Apply a and firewall-mounted nose gear. I had adherance of the covering. I have read a border of masking tape around the area some doubts about the sheet metal tack rag is recommended for a final wipe to be reinforced. Cover it with epoxy, screws used to hold the engine to the down . . . I threw mine away the first and lay on an oversized piece of cloth. mount, and replaced them with blind time I had a paint job ruined because of Add more epoxy from the outside, nuts and 4-40 Allen head screws. I realize residue from a commercial tack rag. If being careful that the cloth is saturated that using the sheet metal screws is done you feel one is necessary, use a lint-free but that no thick build-ups occur. Do successfully and is even recommended cloth slightly dampened with alcohol. this right up to the masking tape, and by some of the manufacturers of molded The horizontal stab is temporarily slightly over it. Soon after the epoxy has plastic mounts, but now and then they placed in position, and a line drawn set, but is not yet completely hardened, will come loose, or the hole will get too around the fuselage section. Cover only the cloth can be trimmed around the big for the screw. I decided long ago that to this line, so that the epoxy later used edge of the tape. A new No. 11 blade on I wasn’t going to have things drop off in to secure it will be holding foam to foam, your Uber Skiver will do this perfectly. flight if I can possibly help it, or make a not foam to covering. The rudder is Press down the edge, remove the tape, trip to the field and not fly ju?t because I covered down to the fuselage line: the and give it a few more minutes, after tried to save two minutes and 19

122 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER CARR SAILS ( R e a l i s t i c 7608 GRESHAM ST. r/c sailboats SPRINGFIELD, VA. 22151 STANDARD ON ALL CARR SAILS Finest American-made DACRON sailcloth Vinyl. press*on numerals and insignia Heat sealed edges eliminate fraying Coated stainless steel iibstay installed Rotted-edge grommets m tack, clew & head Bolt-rope mains I luff mast attachment Santa Barbara $30.00 10-Rater $30 00 East Coast 12-Meter $30 00 50/800 (M-class) $30 00 36/600 $25 00 Internat A-class $35 00 West Coast 12-Meter $30 00 Star 45 $30 00 Vanguard "J' -boat $40 00 TAA Petrel $30 00 Sca'e vessels, special purpose boats, one-of-a-kmds Wnte for a quote, and for our 1978 Brochure and Used Sails List

sensitive. similar three-channel installations when I would say that it is almost impos­ the rudder (turn) control is controlled sible for a student to stall this model. To by what is normally the aileron stick in do so, you have to keep power on, four-channel installations. It works, but establish at least a 45-degree climb, and the longer the newcomer flies this chop power, after which the airplane airplane, the more he will get used to will slow down, drop the nose, and glide nosewheel steering in this manner, ahead. Nothing violent, and no sign of a which he will later have to unlearn when wing dropping or a spiral unless rudder he graduates to an aileron-equipped model with the nose wheel coupled to We make model sailboat kits tor radio control, also is also applied. If a stall is attempted out spars, hardware, sails, winches. Mail order only. of level flight, by chopping power first rudder on a different stick. Write for tree illustrated price list or send $2.00 for and then attempting to lift the nose, you Then too. in common with all high complete information package. will simply lose speed until it is starting wing trike gear equipped models, the Trainer Hawk does not like to taxi in the Vortex Model Engineering to mush, then slowly drop the nose and Department MB go through the cycle again. wind. It tips over in a crosswind, unless 210 East Ortega Street The Hawk will roll quite readily. Out you go very slowly. In fact, if it wasn’t Santa Barbara, CA 93101 W ί'*"* of a slightly nose-high attitude at which that the beginner really needs that prop- you would approach a roll with an saving long landing gear, it could be shorter for improved ground handling. aileron equipped plane, full rudder in be obtained if yourstudent zigs when he Even though non-steerable nose wheels either direction will result in a large should have zagged. The wing is priced do have other disadvantages, I would , losing 50 to 75 feet of alti­ at only $10.95, as is the stab and rudder vote for that for a rank beginner. . . but tude and finishing up in a dive at about combination. The fully assembled fuse­ then there is that old saying about 15 degrees. lage, less engine, is $49.95. Engine parts. More realistic roll can be made by opinions being like noses; everyone has starting with the nose higher, at about 45 one, some are just bigger than others. down to the last nut and bolt, are also degrees, upon which full rudder will Another of my opinions is that at $98. available, should they ever be required. result in what closely resembles a fast this minimum-building, maximum­ The complete Trainer Hawk is a prod­ . There will be no loss of flying Trainer Hawk is an excellent buy. uct of Model Rectifier Corp., 5200 altitude, and it will end up in straight and Bear in mind that this includes a $40.98 Woodbridge Ave., Edison NJ 08817, and level flight. engine and $6.98 muffler that can be is available from its many dealers and With the degree of control men­ used for years, and that except for the distributors. Parts for the airplane and tioned, the Hawk will do a fast spiral but I radio and general purpose items listed, engine will probably not be as widely was not able to get it to spin. you won’t have to purchase anything stocked, and may be obtained directly else directly connected with the air­ from MRC. which has promised com­ Landing is normal; it requires the plane. plete stocks and speedy shipments. usual flying to get it on final, after which Have a nice training session! · it is just a matter of letting it come in and Important too, is that spare parts can flaring out at the proper time. The airplane does not have any charac- teristiics that will affect its ability to do irk 1A WATER JET PROPULSION what it isprimarilyintendedfor: training. for It does possess enough flying ability to MY-T-JET DEEP “V" R/C BOATS require controlling ... it will not fly itself 100%, so it can also be fun for the flier who has mastered the basics. • Complete precision Í mn y'TNv//' engineered assembly The instructors list the throttle instal­ Jr/ V lation as optional, but I strongly recom­ • Cast aluminum housings with > mend it. as it is a definite help in getting stainless steel hardware your student those important landings • For engines of .30 to .60 and approaches. And as the airplane displacement does not really need full throttle to • Fits most Deep "V " hulls maintain altitude, it is also nice if you can throttle back to a slower speed while he • Thrust reverser for backmq down Send Today for Free Brochure & Pricing is making his first flights. • "Closed Loop" cooling system for engine The one control I am not fully in agreement with is the use of the nose HILBIG INDUSTRIES. P 0 BOX 24S. BONITA. CALIFORNIA 92002 wheel coupled to the rudder, in this or

DECEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 123 with round bottom that dressed it up. Actually, the “ improvements” did not help the performance of the model, but it did look better. Everyone in the Reading gang who could afford a motor built one or two of this good-flying design. Actually, our club members ended up covering the model with light cotton cloth, as bam­ boo paper did split easily. Surprisingly, the models still only weighed between 4-1/2 to 5 pounds . . . a small price to pay for added strength and long-lived covering. When the limited engine run events first came out, Bob Gable won the first meet and the Polk Trophy to boot. The last one built in their area was later called the Long Cabin (as described in Air Trails). HRE chassis kits are aerospace quality w ith aluminum Most everyone built the “ Old Box” so parts anodized. They also have: ALU M IN U M FRONT A XLE , it was no surprise when Steve Kowalik DISC BRAKES for consistent braking, AERODYNAMIC had a model called the Miss Delaware (June ’78 MB) that was almost a carbon WING for lowest drag, BALL or ROLLER BEARING copy. About this time, Steve won the CLUTCH for trouble-free operation, NYLON SPOKED Consistency Event with his model, and WHEELS for appearance and life, POWER ADJUSTABLE was approached by Ideal to kit the REAR END, an HRE exclusive. design. To make sure he wasn’t stepping on M chassis kits for K&B 3.5cc engine have an 8mm my toes, Steve got together with Bob TITANIUM REAR AXLE; more strength, less weight. Long, Mel Haines, and Bob Gable to Other HRE exclusives are: A IR PUMP FLYWHEELS, obtain permission to use the design. Inasmuch as the Limited Engine Run FRONT and REAR ROLL SUSPENSION kits, TECH Event was now becoming the vogue and MEMOS. the early Zipper-type pylon models were making themselves felt, the gang said go SEND 20d (stamps OK) FOR BROCHURE ahead. (Columnist’s note: As it turned out, HRE, 18276 Foxglove Way, Irvine, California 92715 the Ideal Co. did not want such a large model, realizing the market change for about it, the model was built, covered the new rules. Kowalik then scaled his Plug Sparks. . Continued from page 68 with bamboo paper, and doped black model to five feet, which the Ideal Co. and silver with big letters “ Croll & Keck” bought and called the “ Air Chief” .) big time model race car competition. on the model. Surprisingly, the model The main point I wanted .to make is With the advent of the glow plug and the flew quite well. So, to get some publicity that Mel Haines of Reading should be introduction of the powerful small for the company, Croll and Keck spon­ given due credit for the early designs. motors, the company quickly fell into sored Mel Haines and Bob Long to the Mel no longer builds now. He has run financial trouble and discontinued Nationals at Akron that year. the Haines Hobby Shop in Reading for production. All in all, about 1,000 to It was at Akron that Bob Long decided over 30 years. He was one builder in a 1,500 Edco Sky Devil engines were the model needed more circle to im­ thousand. Everything perfect! His mod­ produced. prove its performance (they were els were always a work of art. The columnist would be remiss in not tweaking rudders that early!). That acknowledging the tremendous amount This yarn was submitted by Bob Gable, ended the Loutrel Speedster, as it spun one of the surviving members of the of research work done by Bill Thomp­ in and thoroughly demolished itself. son, who published a very complete Reading. PA gang. A word about Gable Back home, chastened but not dis­ is in order. history of all Hassad engines in the couraged, Mel Haines made a trip to the Model Engine Collectors Journal back in Bob has been building models for butcher shop and promoted some 18- over 50 years and still hasn't lost his zest 1973. Many thanks are due to Bill for inch wide butcher paper and as long as most of the foregoing information. for them. (Kinda like this columnist.) needed. (Oh! those were the days! Gable has won his share of contests, but THIRTY YEARS AGO. I WAS. .. Everyone must have used either butcher Bob Gable of the Reading, PA group no longer competes actively. paper or brown wrapping paper.) Bob sez he must have built close to writes to say that the design that started After a short conference (bull session in their area was called the “ Old Box". several thousand modelsoverthisperiod to you), the boys decided the original of time, most of them his own designs. In The design was started the year the Speedster design was good but that the Brown Jr. was born (not sure whether regards to the “ Old Box” , he built two parasol idea was bad. The same force within the last five years (for radio 1931 or 1932). Like all modelers, the set-up was used, but a cabin replaced Reading gang.really went bananas over control, of course!). The first one was an the struts. Wingspan was increased to .020 version with pulse control; i.e., gas models. seven feet. Well, wouldn’t you know it, Mel Haines worked in the Hobby single channel. Unfortunately it got the model was one of those that literally downwind too far and was lost! To really Dept, of Croll & Keck at that time. It flew off the drawing board. didn’t take Mel very long to talk the rub things in, it was on the first flight! manager, Sol Asen, into giving him the This design started winning contests at The second "O ld Box” was a six-foot first motor and kit in Reading, PA. At this once. At the Eastern States Champs, model equipped with rudder, elevator, time, there was only one kit available, against Joe Kovel and a flock of other and motor control. This model has had the "Loutrel Speedster” , a parasol experts, it placed high, and not too far many good flights and has proven itself monoplane of six-foot wingspan. behind Kovel’s record setting flight! to be a good trainer, as it was sold to a The “ Old Box" was built in many beginner. Bob concludes by saying the Well, in less time than it takes to tell forms. One favorite was a wider fuselage “ Old Box” was a good airplane, but it

124 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER had a bad habit of flying away all the time. OK 60 TIMER REPAIRS Bill Baker, of Norman, Oklahoma, submitted a photo of a real neat idea to replace the cam rider on an OK 60 motor. We thought it was so great that we are running a photo of same and letting Bill tell his story. "M y OK Super 60, a good runner, came to a sudden stop quite unexpect­ edly. Inspection of the motor revealed the trouble to be the cam rider on the moving point assembly. The rider was shattered. Further investigation dis­ closed it was made of some sort of hard plastic (probably bakelite). Age had made it brittle. “ Looking the piece over, I was struck by the similarity of shape to a nylon R/C control horn. So I cut a horn to the shape of the cam rider. First, I drilled out the rivets on the timer arm and replaced them with 2-56 machine screws and nuts. When re-assembled, the timer assembly works like a charm!” Bill concludes by saying the operation Q ive a Q reatcV íse! is quite simple, requiring only a Zona saw (to cut the nylon horn) and a hand PanaVise ... a great gift idea. Everyone loves a PanaVise. drill. He hasn’t looked into the possi­ It tilts, turns and rotates every which way to quickly and securely bility of adapting this idea to other position work exactly where wanted. engines, but it will work with engines Sturdy all metal construction. Model 301 original PanaVise shown. having a similar point assembly. Model 381 has vacuum base. Available at your dealers, boxed 1979 VAMPS ANNUAL ready to go, along with a variety of other PanaVise interchangeable Now, that’s the way thiscolumnist likes bases, holders and accessories. to receive an advance contest notice .. . early! Scheduled for February 24, 1979, Γο ΥλΜΊΛΠ/λ^ J fc e C ® Write for FREE brochure and dealer list. the Vegas Antique Model Plane Society b - i n M P a f l a t D e p l CHS. 2β50 29th Street. Long Beach. CA 90806 will hold their Spring Annual at El Dorado Dry Lake, Las Vegas, Nevada. Seven events are scheduled to be submit photos, writeups, anecdotes, or Coast Guard Training Center near Pet­ flown on both days: A-B Cabin, A-B what have you, for possible inclusion in aluma, provided ample area for flying. Pylon, C Cabin, C Pylon, 30 Second this column. It has been the policy of this The only drawback was the high grass, Antique, .020 Replica, and Old Timer writer to avoid a provincial look in which got neatly mowed by all props. Scale. There will be one special event, reporting O/T activities around the Editor Kafer modestly attributes his known as the Don Weitz 96-inch-plus nation. Remember fellows, I can’t put victories to a newly discovered tech­ event, which is for models of 96-inch your photo in if you keep it at home! nique, to wit: wingspan or greater. Anyway, if the reporter just wrote on Crash your airplane on a downwind In many respects, the latter is suspi­ the Northern California activities, he landing when your motor quits with fifty ciously like a Texaco event, with the could fill a half column on what SAM 21, feet of altitude. You will then spend limitations very similar to the Brown )r. 27, and 30 have been doing in R/C O /T considerable time repairing the model contest as recently put on by Bud flying. As an example, SAM 27 has finally until the lift improves (after most have McNorgan of the SCAMPS. Motors will been successful in promoting a field, already flown). Shades of Larry Boyer! be limited to original ignition engines of and is subsequently having an upsurge Also reported was the SAM 27 club’s not more than 1.00 cubic inch displace­ in activity. generous prizes: large quantities of ment. The rules are otherwise pretty Fields are always difficult to obtain, balsa wood! It is ironic; those who win, much as outlined in the SAM Rulebook, but in this case, Karl Tulp used a dif­ don't need the balsa. The losers need it with a particular emphasis on fidelity to ferent idea by approaching the Coast more to repair their models! Maybe an the original design. Guard to use the area scheduled to be awarding of merchandise prizes for For further information, write to Bob turned over to the county because of reverse finish might spark up some real Haight, 5724 Balzar Avenue, Las Vegas, lack of use. The government officials interest. Of course, this would have to NV 89108, or failing that, call at (702) were delighted to see the park facilities be announced just before the contest 648-2287. used again (with fun flys, picnics, and ended to prevent sandbagging. Sounds CALIFORNIA CAPERS general get-togethers), as it meant there wild! You would never know if you were With the tremendous amount of Old was a justification for retention of the a winner until the end! Timer model flying in California (no less property. Other clubs would do well to NORTH-SOUTH MEET than eight SAM Chapters), this col­ look into unused government areas. In Here is a meet that has all the potential umnist could probably write a column many cases, they are simply up for grabs. for developing a rivalry similar to base­ every month devoted just to California The last SAM 27 contest was dom i­ ball's LA Dodgers and SF Giants, but activities. When one considers other nated by Ted Kafer, the SAM 21 news­ somehow or another it never seems to clubs like the Orbiteers, San Valeers, letter editor, who showed the boys how materialize. Peninsula Channel Masters, and the U.S. with his ignition-pow ered Jasco Fla­ As pointed out by )im Dean, editor of Free Flight Champs at Taft, there is no mingo by taking first in the Texaco and the SCAMPS newsletter, "H o t Leads” , dearth of material. Antique events. (Understand he ran out the beautiful flyers produced by the This is one of the main reasons the of time to compete in the Limited Engine SCIFS failed to get distributed up in columnist, in his many travels, is always Run event.) Northern California. The net result was exhorting the local membership to This meet, held at the Two Rock U.S. that the North-South meet was com- DECEMBER 1978 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 125 he is fully aware of the performance characteristics of these old crates. Much to everyone’s surprise, the twin pusher racked up the highest time of the day. FLY ELA t r i c You guys didn’t know that twin pushers could soar, huh? Actually, Hal Cover won the Twin VL-101 Electric propulsion system Pusher event along with high tim eof the shown— using Hytork 48 motor and day, closely followed by Jim Adams. The planetary gear box, SJ-3 switch & Distance event was won by Jim Adams, charging jack, and B-33L fast charge but unfortunately no one actually mea­ ni-cad flight battery— total weight sured the distance traversed. Maybe 2>/2 oz.— will power models 25 to next time. 50" wingspan weighing up to 10 oz. * And there will be a next time, as this Send 50c for latest catalog showing V L P R O D U C T S twin pusher meet proved to be so full line equipment & accessories. wrDivision of Vista Labs popular that another is scheduled for Hobby dealers send for information. 7023-D Canoga Avenue October 24. Don’t miss this one! Canoga Park, California 91303 “ MUTT & JEFF” CONTEST This unusual name was developed by SAM 49" for a recent O /T R/C contest that featured a Texaco event and an .020 event. (Big and little, get it?) Unfortu­ VE9-9IB. YES-SIR. THREE BAGS FULl TN nately, this meet fell between several large meets, and attendance from North­ ern California chapters was dismal. Three events were offered, with the most challenging being the balloon bust event. As the writer has attended quite a few of these type R/C meets, it was no great surprise to find that no one had broken a balloon. The columnist is still waiting for someone to break one. WALT MOONEY NOW OFFERS 3 SAGS OF PEANUT SCALE PLANS Those balloons are tricky little things to ALL WELL TESTEO DESIGNS, AT ONLY tS.OO EACH hit. And the wind doesn’t help one bit! EACH BAG FEATURES FOURTEEN PEANUT PLANS, According to Bob Sliff, editor of the “ Arcing Point” , the SAM 49’ers’ news­ ONE OTHER, PLUS PHOTOS AND INFORMATION letter, the biggest story of the day was SEND tl.00 FOR COMPLETE LISTING AND SAMPLE PLAN TO: Ross Thomas flying proxy for Nick WALT MOONEY, 2912 CABRILLO MESA OR Nickolau. Ross found that the warp in the wing (which was difficult to fly) wasa BAN OlCOO, CALIFORNIA - 92123 natural for a turning climb and circle in a f strong thermal. Needless to say, Ross Contest should have been called the found the right thermal to fit the warped VINTAGE R-C FLANS Gene Wallock Benefit. In one of his wing of the Dallaire, and promptly took rather infrequent appearances, due to first place in Texaco. his work load, Gene is always a good bet For those who are wondering what to win. This meet was no different, with Ross Thomas was doing flying someone Gene copping first in the Ohlsson 23 else’s model, a fire in the Thomas home event, first in Class A Pylon, and first in wiped out all his models and radio PIPER J - 3 CUB- 1 / 4 SCALE Class C Cabin. Tough man to beat! equipment. He has not had the time for ΓΤ. Wing Spån — ocsignio >v - t.c.sw iiizt· For the benefit of those unfamiliar models, as rebuilding the home comes ( id e a l f o r 'QUADRA g a s e n g in e ) MRKC LRRRtRCORt FOR QUARRR f „ · IM( with this novel event, the rules call for first. Plans: $ 13.95 rlans-ado »ιλοpostage the exclusive use of Ohlsson 23 motors Al Heilman finally put it all together 5 SHEETS Se"X72' in any cabin design you like. Pylon and won .020 Replica with a fine flying Plastic Cowl: $ 8.75 t iso p o s t a g e designs are prohibited. After that, it is Strato Streak, using an Ace pulse system. Edo float plans: S 4.00 % i.oop o s t a g e just another three-flight, five-minute (or With Sliff taking second in .020 with a FLOATS-AT"LONG DEALERS WORLD WIDE three minutes, depending on weather) Sailplane, also equipped with Ace, the 1978 CATALOG SO f WANTFn OVER 30 PLANS WANTfeP contest, with the highest total winning. only user of Kraft’s new lightweight S ID M ORGAN The 20-second engine run and rise-off- system was Jack Albrecht (he’s Kraft 13157 Ormond, Belleville, Mich, 481ŤI ground takeoffs are strictly enforced. Production Manager, so what else could Probably the most surprising thing he use?). prised of nothing but Southern Cali­ about this contest is the amount of The fine day was embellished by the fornia contestants! In short, it was no­ participation. For a once-a-year type great “ weenie roast” the girls put on, led contest. meet, entries were heavier than most primarily by Marge Bernhardt. This is Big winners were Larry Boyer with standard free flight O /T events. Great what makes O /T flying real enjoyment. Sweepstakes (those Comet Clipper and stuff! Everyone is in the action. Megow Ranger models never seem to For prizes. Bob Oslan brought balsa wear out or get lost!), with Bruce Chan­ GREAT TWIN PUSHER CAPER obtained from Superior Aircraft Ma­ dler, Jim Adams, Andy Faykun, and Brad Jim Adams of the SCAMPS cooked up terials (Mike Taibi), and everyone got a Levine in close pursuit. this meet for Mile Square, with a Twin In summary, it was interesting to note Pusher event being the main attraction. goodlv stack of wood for future projects. that out of 24 entrants, 22 were winners. Along with the two twin pusher events m is s A m e r ic a k it How about that for distribution! (Endurance and Distance), three other P&W has done it again! This time OHLSSON 23 CONTEST events were offered: Commercial Rub­ Gene Wallock announces the produc­ As originally proposed by Bill Daniels, ber, O/T Rubber Scale, and O/T .020 tion of still another excellent partial kit, noted MECA engine collector out of Replica. the Miss America. The parts come with Long Beach, CA, and put into action by This was the contest the columnist excellent instructions on how to set up the SCAMPS, this year's Ohlsson 23 wanted to attend with his twin pusher, as the wing construction properly. 126 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER CLASSIFIED ADS INDEX TO ADVERTISERS Non-commercial (personal items) Rate is 25 cents per word with a minimum of $3 00 Ace R/C, Inc...... , ...... 111 Commercial Rate is 40 cents per word, with a minimum oi $5 00 No mail-order discount Aircraft Model Products...... 116 house ads knowingly accepted No advertising agency discounts allowed Applied Design Corp...... 116 All ads are payable with order, and may be for any consecutive insertion period speeded Astro Flight, Inc...... 120, 121 Name and address free, phone number counts as two words Send ad and payment to Authorized Radio Control Service .117 MODEL BUILDER Magazine. Classified Ads. 621 West 19th St . Costa Mesa CA 92627 Barron's Scale Classics...... 94 Bavarian Precision Products...... 97 Cannon Electronics...... 115 PLANS: Gee Bee "Z" 2"=1', plans used by NEW PEANUTS: Piper Super Cruiser, Bristol Carr Sails...... 123 Granger Williams, $10.00; Gee Bee R-1 M.1 C, Fokker Triplane. Davis DA-2, SBD Classic Era Model Plans...... 118 2"=1\ plans used by Granger, $15 00; Dauntless. OV-10 Bronco. $1 ea Stamp for Cleveland Model & Supply Co...... 94 Monocoupe 110 Clip-Wing 2 "= 1 $9.00; new Peanut/Grapenul catalog Aero Era, Cloudbuster Venture...... 112 1940 Culver Cadet 1 -1 $6.00; Hall Racer 11333 N. Lake Shore Dr., Mequon. Wl 53092 Concept Models, Inc...... 110 1 /2"=1 '=13” span, $2.50 All construction Coverite...... 107 parts plotted on these plans of established OLD-TIMER REPLICAS: Bombshell. Clipper. Cox Hobbies...... Cover 7 scale accuracy &· detail. Add your own Ranger. Buccaneer, New Ruler, Playboy. Jim Crocket Replicas...... 103 control system for RC, CL, or FF. Postpaid. Mercury, others. Catalog 25

128 MODEL BUILDER We began with the receiver, The system includes four S15’s which boasts a dual conversion IF (3-S15’s/l-S15L),our ball-bearing stage in addition to our standard equipped, miniature marvels. double-tuned, RF amplified front end. And we’ve also used our SI5 servo Output m att ball bearing exclusive, extra strength 3-pin connectors for the ultimate in positive contact. Then we built the FP-T7G-72 Dual conversion receiver transmitter complete with 7 isolated- potentiometer We built the Contest 7 to channels, dust-free, ball-bearing Five-polo. 20mm motor prove a couple of important open gimbals, dual-rate elevator points. First, we packed more and aileron controls, slide Within each sturdy nylon case unique features into the entire auxilliary pots, and a beautiful lurks a custom monolithic, single- system than any previous Futaba aluminum - ______> inline IC and a separate output radio. Features to assure you of case. Stage 9 pin IC for the optimum competition-caliber performance Dust-free in selectivity and accuracy. open gimbals coupled with our famed reliabil­ The Contest 7. It all adds up to ity. And we held the price to just Even the ' the most Futaba money can buy. $579.95, just to make sure that servos for I our reputation for quality and the Contest 7 value continues to be unequaled. are special. ^ e - Futaba The Futaba Contest 7 IN THE BEST CIRCLES, IT’S fib e r skiver

A PRECISION INSTRUMENT FOR THE DISCRIMINATING MODELER

Safe, Rear Draw-Bar Clutch 10 Available in seven satin anodized handle colors: Precision, Instrument-Quality Materials silver, blue, red, green, gold, copper, violet. Complete set in fitted hardwood case; includes Strong-Holding Advanced Collet Design 11 uber Skiver, together with two vials containing Non-Rolling Hex Cross-Section four No. 11, and one each of Nos. 10, 12, 15, 12 and 2 0 ...... $14.95 Deeply Knurled, Non-Slip Grip Individual handles (specify color) $5.95 Long-Life, Stainless, Vial of 6 blades (No. 10, 11, or 15) $2.10 Surgical Steel Blades 15 (No. 12 or 20) $3.30 20

See your dealer, or order direct. £ Dealer inquiries are invited. PRODUCTS All direct orders sent postpaid in U.S. MODEL BUILDER California residents add 6 % sales tax. 621 West Nineteenth St., Costa Mesa, California 92627 Six great reasons to give or get R/C gifts from Cox. You've got five exciting, ready-to-run R/C models to choose from. And the best selling radio that controls them all The classic Cox/Sanwa 8020. No other two channel system gives more quality for the money Or provides such precision control for all these ready- built models. Ready-to-run R/C gifts are the best gifts of all. Because the fun starts on the spot. Unwrap them and run them— right on Christmas Day! The breakthrough plane in ready-to-run R/C is our Cessna Centurion. Perfect for beginners, the easy flying Cessna sports a factory installed QRC .049 engine and 36-inch wingspan. R/C s first ready-to-fly powered sailplane is the giant Sportavia. also with a factory installed QRC .049 That 70-inch wingspan makes for great soaring. And for great sport sailing or competition, launch the 36-600 class Tradewinds. It's ready-to-float with a pre-painted hull and optional sail winch. In R/C cars, both the Ferrari 512 BB and BMW 3.5 C S L give you speeds up to 30 mph.superb handling, and more: fully assembled chassis: proportional speed control forward and reverse:high-impact, pre-painted body: and a .05 motor, six-cell rechargeable battery pack and extra gear sets all included Whichever Cox ready-built you choose, be sure to include the 8020 radio Then, expanding a collection of fine Cox models doesn't require the purchase of another R/C system. And that's like getting a present anytime of the year.

C o x Cessna Radio Control Trainer

& Z S S Z 3

ios, Airtronk Kits, Cox Engines. INC A subsidiary of Leisure Dynamics. Inc - - anta" ' Ana, ...... CA 92702 " " ...... Until now if you wanted to buy a ready-to-fly air­ plane that wasn’t an .049 powered toy you had to spend big bucks, or settle for kid stuff control, low end power and minimum performance features. MRC’s Trainer Hawk puts an end to that. Now for under $100 take home, a big brightly colored rugged foam aircraft with full 48" wingspan, 32" fuselage, complete with an MRC- Bulkhead factory installed Enya 151V TV already installed. You’ll fly loops, figure 8’s, Cuban 8’s . . . • Fuel tank and tubing trim it properly and you’ll even fly hands factory installed off. You've complete throttle control at your fingertips. The Trainer Hawk is indeed . Engine mount with Enya 151V TV factory installed a new plateau in beginner ready-to-fly. We’ve designed it with high dihedral, anti-stall * Steerable nose wheel factory installed wing tips for maximum stability and excellent * Pre-bent control rods for elevator, rudder and throttle wind penetration. There’s even a steerable factory installed nose wheel that lets you taxi with complete control. Best of all you can go from buy-to-fly in about • Hinges and control horns factory installed an hour because so many of the time consuming installa­ tions have already been completed at the factory. Two channels control nosewheel steering, Included in the package are muffler, propeller, glow plug, rudder and elevator. Third channel can be spinner, dowels, decals, wheels. See the spirited ready-to- used for control of throttle valve. fly, full size Trainer Hawk at your dealer. It’s ready to go. (Also available, Electra-Fli ready-to-fly electric trainer com­ Model Rectifier Corp. plete with MRC-Mabuchi electric power system installed.) 2500 Woodbridge Ave., Edison, N.J. 08817