volume 5, number 43

FLASH! 1975 NFFC WINNERS If you are new to radio control you may wonder how the pieces fit. Gur free catalog will help you solve your problems. It provides details on the industry’s most complete line, offering the best value in every price range and backed by our unapproached reputation for quality and service. Simply stated, you can't go wrong buying a Kraft product.

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"Kraft Worlds Largest Manufacturer of Proportional R/C Equipment SYSTEMS, INC. 450 WEST CALIFORNIA AVENUE, P.O. BOX 1268, VISTA, CALIFORNIA 92083 ATLAS VAN LINES AVL-40 1" scale of winningest DRAG N FLY40 MK II-HY2A unlimited hydro in the Gold A hot competition racing model for .40 engine. 36” long, Cup Circuit. Pickle-forked pre-cut birch plywood construction. Includes bow provides maximum plans (only) for realistic topside hatch control. Sturdy birch and to help keep water out and create a mahogany plywood con­ streamlined shape tor top speed. struction. 36" long, for .40 HY-3-28"available for engine A good, basic com­ NEW- .20 engine HY-l-44"available petition hydro for .40 engine. PAY'n PAK PP-20 for .60 engine. This new stand-off scale model of the national unlimited hydroplane champ is 30" long, 15" beam, designed for .20 engine and radio control running. Rugged ply­ wood construction. A great performer. . . even for the beginner!

They don’t come any faster, better designed, or better built. These kits are the leaders in stand-off scale as well as all out hydro-class competition. Stable and sure in the turns, and you can pull out all stops on the straightaway. ■ In calm or rough water, for fun or competition, Dumas has the easy riders . . . from hydro to deep vee ■ Now available: Pre-packaged hardware kits with everything you need for running. Props for all models also available separately. A hardware kit for every model. See Your Local Dealer. If He Can’t Help You Write Us. See your hobby dealer or send 50« for our complete catalog dumas bodis Dumas Products, Inc., 790 South Park Avenue, Tucson, Arizona 85719 TRODUCING N ECONOMICAL C HATWILL...

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SIM PLE TO U SE, NO SCREWS OR HARDWARE REQUIRED! For best service, see your dealer 1or items you want. A t last, a spinner that works like you've always wanted! H not available, write direct add SOdper item Goes on like S N A P -S N A P-SN A P ! Comes off 1 - 2 - 3 ! A 5 f ö s (St outside U S.} Minimum order $1 No screws to ti()hten| no extra hardware to buy. Built to COLORS SIZES take electric starters. Over 2 years in development. Study RED 154" - .90 the features shown here, then ask your dealer for the WHITE 154" - 1.00 Carl Goldberg Models Inc. BLACK 2 " - 1.25 4736 W. Chicago Ave., Chicago, II 60651 • u "a p ® n Spinner — the beautiful one that does the YELLOW 254" - 1.50 I am sending 25c for 8 pg illustrated job like no spinner ever did before! Catalog with Basic Explanation of R/C BLUE 2 5 4 " - 1.75 Equipment and Radio Control Definitions

MANUFACTURERS-All Name our accessories are available at excellent O E M bulk prices A ll ITEMS AVAILABLE IN CANADA Address ______CARL GOLDBERG MODELS INC. C ity ______^ ^ 4736 WEST CHICAGO AVE.· CHICAGO, ILLINOIS 60651 State.Zip------New Heathkit Pack-17 TM R/C Systems

the instant way to change frequencies

New 5&8 channel single & dual stick systems have 17 plug-in frequency modules. No more wasted flying time, standing around at the field waiting the time-consuming point-to-point wiring, transmitter Pack-17 for your frequency to open up. With Heath’s new GD-1205 and frequency modules that are fully assembled. And the main cir­ 505 Pack-17 systems you can operate on any of the 17 R/C cuit board swings out to simplify adjustments and servicing. frequencies with just one transmitter and receiver. Just plug the Pack-17 for any open frequency into the transmitter and Save money, build them yourself. Kit GDA-1205-S, 8-channel, receiver. In an instant, you’re ready to fly. single-stick transmitter with one module, $159.95*. GDA-1205- D, 8-channel, dual-stick transmitter with one module, $139.95*. All Pack-17 transmitters and receivers are compatible . . . you GDA-505-S, 5-channel, single-stick transmitter with one mod­ can even interchange frequency modules. And you’ll enjoy ule, $139.95*. GDA-505-D, 5-channel, dual-stick transmitter these deluxe features as standard equipment... 4 of the chan­ with one module, $129.95*. GDA-1205-2, receiver with one mod­ nels have trim adjust, relative power meter, trainer-link socket, ule, $59.95". GDA-1205-3, receiver battery pack, $9.95*. Addi­ nickel-cadmium batteries for transmitter are included, plus a tional transmitter modules, $17.95* each (assembled). charger that handles all batteries simultaneously. The great Additional receiver modules, $11.95* each. GDA-1205-6 trainer new receiver has full 8-channel capability and uses Pack-17 link, $9.95*. modules. The new servos have stronger cases, sturdier gear­ ing, and gold-plated contacts. Save even more on complete systems. $44.70 on 5-channel Another Heath first. . . no more servo centering problems. systems with modules for one frequency and $49.60 on 8-chan­ nel systems with modules for two frequencies. All four systems Pack-17 systems include a precision alignment circuit that al­ include the receiver battery pack. lows you to easily check centering to a 1.4 millisecond standard. Pack-17 systems are easier to build, too. Uncrowded circuit Write for your free Heathkit catalog and get all the details on layout, prefabricated wiring harness that eliminates much of the new Heathkit Channel-Pack systems. It’s the only way to fly.

HEATHKIT ELECTRONIC CENTERS- Unlts of Schlumberger Products Corporation Heath Company, Dept. 238-07 Retail prices slightly higher. Benton Harbor, Michigan 49022 Schlumberger ARIZ.: Phoenix; CALIF.; Anaheim, El Cerrito, Los Angeles, □ Please send my free 1975 Heathkit Catalog. Pomona, Redwood City, San Diego (La Mesa), Woodland FREE Hills; COLO.: Denver; CONN.: Hartford (Avon); FLA.: Miami 1975 □ Enclosed is $______plus shipping. (Hialeah), Tampa; GA.: Atlanta; ILL.: Chicago, Downers Grove; IND.: Indianapolis; KANSAS: Kansas City (Mission); Heathkit please send model(s)_ KY.: Louisville; LA.: New Orleans (Kenner): MD.: Balti­ more, Rockville; MASS.: Boston (Wellesley); MICH.: De­ Catalog Name troit; MINN.: Minneapolis (Hopkins); MO.: St. Louis (Bridgeton); NEB.: Omaha; N.J.: Fair Lawn; N.Y.: Buffalo (Amherst). New York City, Jericho (LI.), Rochester, White describes over 350 Address Plains; OHIO: Cincinnati (Woodlawn), Cleveland, Colum­ money-saving kits City State Zip bus,Toledo; PA.: Philadelphia, Pittsburgh; R.I.: Providence you can build. Send pmeu * SPECIFICATIONS susjcct to chanoc WITHOUT notice, (Warwick); TEXAS: Dallas, Houston; VA.: Norfolk (Va. •mail order puicesi r.o.e. factony RC-111A I Beach); WASH.: Seattle; WIS.: Milwaukee. for your copy today. -———-I

MODEL BUILDER MODEL# JULY 1975

BUILDER volume 5, number 43

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

STAFF CONTENTS

EDITOR CONSTRUCTION Wm. C. Northrop, Jr. WORKBENCH, Bill N o rth ro p ...... 4 GENERAL MANAGER Anita Northrop OVER THE COUNTER, Bill N o r th r o p ...... 5 EDITORIAL ASSISTANT Le Gray HOW TO RACE AND PLACE A SLOW AIRPLANE, Dan Dougherty .... 10 ASST. GEN. MANAGER REMOTELY SPEAKING, Bill Northrop ...... 12 Dawn Garrott HALF-A RACING AT VALENCIA, Larry R e n g e r ...... 14 ART DIRECTOR Paul Plecan CHOPPER CHATTER, John T u c k e r ...... 16 SECRETARY PRODUCTS IN U$E, T a y lo r C o llin s ...... 18 L. Gordon SUBSCRIPTION MANAGER R/C SOARING, Le G r a y ...... 24 A. Valcarsel STRICTLY SAIL, Rod C a r r ...... 26

CONTRIBUTORS PLUG SPARKS, John P o n d ...... 28 Rod Carr CONTROL LINE, Jed K u sik ...... 33 Chuck Hallum F/F SCALE, Fernando R a m o s ...... 38 Bill Hannan Jed Kusik HANNAN’S HANGAR, Bill Hannan ...... 40 Walt Mooney FREE FLIGHT, Bob S ta lic k ...... 46 John Pond Fernando Ramos R/C AUTO NEWS, Chuck H a llu m ...... 54 Bob Stalick SCALE VIEWS John Tucker TRAVEL AIR 2000, Peter W e s tb u rg ...... 21

POLIKARPOV R-5, M odelar M a g a z in e ...... 41 ADVERTISING REPRESENTATIVES WEST: Bob Upton, 20626 Clarendon Ave. FEATURES Woodland Hills, California 91364 (213) 884-2294 LITTLE BOMB, HALF-A PYLON RACER, Wm. R. Nielsen, Jr...... 9 EAST: Walt Moucha, 38 Coppersmith Rd., Levittown, New York 11756 BUZZARD BOMBSHELL O.T., Phil Bernhardt...... 31 (516) 796-4898 THE ALIEN, Daniel W a lto n ...... 35 Subscriptions $12.50 per year, $23.00 for two years. Single copies $1.25. Add $2.00 for postage per year outside of U.S. (Except PEANUT P-47D THUNDERBOLT, Dennis N o rm a n ...... 42 APO). Add 75 cents for Canada and Mexico. ULTRA DART, Dave L in s tru m ...... 51 Copyright 1975 The MODEL BUILDER. All rights reserved. Reproduction without permission prohibited. Published monthly by MODEL BUILDER Magazine, 1105 Spurgeon, Box 4336, Santa Ana. Calif. 92702. Phone (714) 547-3963. Cover: The tension and excitement of F/F night flying is caught in this photo by Taylor Change of address notices must be received Collins during the 1975 Memorial Day Weekend National Free Flight Championships at one month before date of issue that new Taft, California. Randy Secor, a Senior, and '74 Nats F/F Category Champ, as well as '74 address takes effect. Send old address with NFFC Sweepstakes winner, launches his ST .46 powered Tarter (a 1975 Ten Models of new; old label preferred. Post Office will not the Year winner designed by Red Johnson) as Vic Cunnyngham, Jr. supplies the ground forward copies unless you pay extra postage. illumination. Strobe flash stopped the action, but the slower camera shutter picked up Duplicate issues cannot be sent. the airborne light bulb as a streak, just behind the Ί' in Randy's license number. Second Class postage paid at Santa Ana, Ca.

JULY 1975 3 Some contestants at the really first Nationals, held in 1923, not 1928. Jack Laughner, far left, later won the Nationals in 1926. Third from left (only his forehead shows) is Merrill Hamburg, and the second from right is Major R. W. "Shorty" Schroeder, an NAA contest committee mem­ ber, and a great booster for model aviation. For more info see text on Bert Pond's comments.

0 / / / N orthrop'* w o r k b e n c h • Though you won’t be reading too yet the big event actually took place for To support all o f the above, Bert much about it in the other model maga­ five years previous to that, starting in sent us Xerox copies o f rules, contest zines, the country’s largest and oldest 19231! committee reports, contest announce­ model airplane meet, sponsored by the In a letter sent to this editor in 1972, ments, prize list, a program, and a con­ publishers of “ MODEL A V IA TIO N ,” Bert Pond, a well known Old Timer testant’s pass. In the Contest Committee will take place in Lake Charles, Louisi­ modeler from Longmeadow, Massachu- report for the fiscal year beginning Oct. ana, August 4 to 11, 1975. It is to be settes, states that the Junior Flying 3, 1923, the N.A.A. stated that Mr. the 48th in a row . . . or is it? Consider­ League o f the National Aeronautic Asso­ William B. Stout had offered a trophy ing some o f the sponsoring organization’s ciation, in conjunction with the 1923 for R.O.G. models, and the first contest actions in recent months, nothing should International Air Races, St. Louis, Mis­ for this trophy was held in Akron, Ohio. come as too much o f a surprise, but try souri, held the Mulvihill Model Trophy Continued on page 82 this one on and see how it fits: The Duration Race for model airplanes on American Muddling Association claims September 30, 1923! An Edward Lange that this national contest has been going was the winner, and Bert himself, placed on since the “ first” one in Detroit, 1928, third.

No. it's not Pop Art. Read about "Suds City addresses onthe b^xes* Ι β β ^ β χ Γ ί ο Γ * hadn’* been f° r the ra,her lar9e Text tor Hardly V run-downPh° t0 on free flight at the Nationals. Soar-In," co-sponsored by Old Milwaukee. 4 MODEL BUILDER OVER THE COUNTER S ...... — - = 7

■ Y - • / [V ’ I aL. ! , 1 ' ______. . . . / Π t- 1 ' / / , f \ / 1 , 4 / · 1 / Λ J 1 }, ' : ; /'! / ! i/: f i / i < ·

• Jim Crocket Replicas has added three new items to its ever-expanding line of handy hardware for free-flighters. Cro­ cket’s offerings include a cast aluminum flood-off switch bracket. The aluminum bracket bolts to an engine mounting lug. A monofilament “ lasso" passes around the fuel line and connects to the flood-off timer. When the timer releases, the tension on the line is relaxed, flood­ ing the engine. This clever bit o f hard­ ware was designed by Dave Parsons, of the Oakland Cloud Dusters. Crocket has also introduced a cast Jetex 150 mount­ ing plate. This unit is threaded to accept the Jetex mounting clip, and one side o f the flat plate is “ dimpled” heavily to assure a good bond with epoxy. A lug is provided to allow attachment of a safety wire. The third new item in the Crocket Replicas line is a package o f ten stainless steel coil springs. These small springs should find lots of usage by tinkerers in all phases of modeling (not to mention saving the usefulness of the family ball point pens). The CR-I20 Flood O ff System Kit retails for $.80. The Jetex 150 Motor Mount kit, CR-123 sells for $1.50, and the CR-I24 Stainless Steel Springs sell for $1.00. All are available from Jim Crocket Replicas, 1442 North Fruit Ave., Fresno, California 93728, or your local hobby dealer. * * * Kraft Systems, Inc., 450 West Cali­ fornia Ave., Vista, California 92083, at Servo Master and Power Check II by Crystal Products.

Spray Adhesive 54, by Wilhold Glues, Inc. Wilhold's Decorator's Glue for arts and crafts.

5 JULY 1975 is now offering a twelve page documenta­ tion booklet on the Baby Bullet. Gene Thomas really did his homework on this RADIO CONTROL one! The booklet is jam-packed full of reproductions of factory drawings, flight manual drawings, and a complete history o f Edward Heath’s famous racer. There are many excellent photographs of the plane, showing different paint schemes, and construction details. The center spread drawing, which shows several d if­ ferent versions o f the aircraft, is also available as a brown ink on buff stock print. The quality o f Gene's artwork is such that this would make an excellent wall hanging. Also included in the book­ let are reprints from Aero Digest and the Modern Mechanics Flying Manual. The booklet will retail for $2.00 plus .25 postage. The center spread print is $2.00 plus .75 for First Class postage (mailed in a large diameter tube) and Stainless steel springs for all uses, by Jim both are available together for $4.00 Buyer's guide has all R/C items. Crocket Replicas. (First Class postage included). The book­ long last has tneir Schnuerle ported R/C let makes interesting reading, even if ribs, and all necessary hardware. The .61 engine available. Billed as the most you don’t build a model. The booklet plane can be flown with two channels op­ powerful R/C engine available, the Kraft and print can be ordered from Gene erating elevator, rudder and coupled ail­ .61 comes complete with muffler. Weight Thomas, Thomas Studio, 16 Scott Drive, erons, or the modeler can go “ full house” of the ball bearing engine, with muffler Huntington Station, Long Island, New and add spoilers, flaps, releaseable water is 18 ounces. The specially designed car­ York 11746. ballast, and releaseable tow hook. You buretor is equipped with twin needle * * * can also add all scale cockpit details. Pro­ valves to control high speed and idle LSD usually refers to a turn-on or a vision for all of these items are shown on independently. This feature provides high . . . in this case, you get “ turned- the plans. The progressive airfoil changes smooth running and linear throttle res­ on” to getting “ high” with an LSD Or- from an Eppler 392 to an NACA 3412 at ponse at all speeds. Introductory price nith sailplane. This 138 inch scale soarer the tip. The mid-wing configuration with for the engine is $99.95. is being imported by Windspiel Models, ailerons has no dihedral on the ground. * * * 835 Piner Rd., Santa Rosa, California In flight the wings flex to provide about Gene Thomas Studio, producer of 95401. The deluxe kit for this 1/5 scale 3° dihedral. Unfortunately, we did not the 1-1/2 inch to-the-foot and Peanut reduction of the full size bird includes an get a picture in time for this issue . . . scale planes for the Heath Baby Bullet, epoxy resin fiberglass fuselage, pre-cut (Whoops! It just arrived!) Retail price for this superb scale soarer is $150.00. Windspiel Models is also importing from Japan a Strobo-Flasher unit for night flying use. This is a true “ strobe” type light, similar to the lights used on full size aircraft. Powered by two AA pencell batteries, the two strobe bulbs are very bright when covered with their colored transparent housings. With the housings removed, the light is nearly blinding. With fresh batteries, the flash rate is about once per second. The 4 Kit for the LSD Ornith is imported by Windspiel Models. ounce weight o f the complete system is

PNOMt »97.441« xiwim. Mieiv tNiKA«t *»»hj »*“« ·» ··"··■' ··· —-»·*"·- Í44JN 7*UIT AVEWUt int and motor holder PHESMO CAE If JIM CROCKED REPLICAS T O O L t A A C C A A A O * «·» a l u m in u m CAVtiM a*

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CRIPTION. » Parsons, o* me Oakland Cloud Ousters, came up with this simple way to increase 'm. Since the actual tension release point is very close to the engine intake, the tlooc positively. The small biacket bolts to an engine mounting lug. A nylon cord passe mh fwn rmsll k«!«· ·- ·!»- . ■ Λ . . fin # ·· * Jetex 150 Motor Mount by Jim Crocket Replicas. Cast and polished aluminum parts for flood-off switch, by Jim Crocket.

6 MODEL BUILDER Aerotique stocks a complete range o f safety equipment for modelers, includ­ ing helmets, face shields, goggles, and respirators. To get a pair o f ear plugs that will be effective, they must fit. To get ones that fit you must know the size o f the open­ ing in your ear. To measure this you need an ear gauge. Naturally, Aerotique offers just such a gauge. Kind o f a one shot item you say? Not true... after you’ve measured the opening in your ears, the molded nylon gauge serves as a dandy fillet forming tool! The different diameter balls can be used to smooth epoxy and other filler materials into smooth, uniform fillets, just pick the radius you want and run it over the fillet. The nylon material is easily cleaned ..-. Make sure you do. Who wants epoxy in their ears? Hi-Start reel from Craft-Air. * * * The Kraft 60 R/C Schneurle ported engine. Wilhold Glues, Inc., 8707 Millergrove “ light” enough for most any R/C model, Dr., Santa Fe Springs, Calif. 90670 has and suggested retail prices o f more than and most larger free flight models. The introduced a rubber based spray adhe­ 1300 radio control model products. Ca­ flash oscillator and connecting wires are sive which is ideal for use in sheeting tegories include: radio equipment, tools, shielded to prevent radio interference, foam wings. Wilhold Spray Adhesive 54 model airplanes, powerboats, sailboats, however, the manufacturer recom­ is sprayed onto the foam in one heavy cars, helicopters, engines, finishing ma­ mends that the leads be kept away from coat. The wing skin is then pressed down terials, hardware, accessories, and much the radio receiver antenna. The system while the glue is wet and tacky. This more. The 168 page catalog is available consists o f three parts. . . the battery will produce a lightweight permanent for $2.75 at better hobby stores, or for pack, the oscillator, and light tubes. One bond. $3.00 postpaid direct from: Radio Con­ strobe light unit may be used by itself Still another handy adhesive from trol Buyer’s Guide, Suite 210D, 8001 to save weight. Forbes Place, Springfield, VA 22151. * * * Wilhold is their Glu-On Fixture Adhesive. * * * With the advent of the ultra-high per­ This heavy-base contact cement type Aer-O-Scale, P.O. Box 3413, Granada formanceracing engines that are so com­ material is useful for gluing servo rails Hills, California 91344, offers a bro­ mon to control-line and R/C pylon rac­ and bulkheads into fiberglass fuselages. chure for 25 cents, which features greatly ing, ear damage is becoming a grim real­ Unlike most epoxies, this Glu-On ma­ reduced reproductions o f the company's ity to modelers. To alleviate the problem, terial is fairly flexible and shock resist­ scale aircraft plans. According to the Aerotique, 19900 Ingersoll Drive, Rocky ant. Glu-On is completely waterproof, brochure, and where noted, some o f the River, Ohio 44116, has made a series of and will bond to most any material, in­ plans are scaled from actual aircraft, and “ ear inserts" available. These soft mold­ cluding metals, fiberglass, and wood. It dimensions have been measured and veri­ ed plastic plugs are good in protecting should be most handy for boaters and fied. Other material is based upon best against hearing loss from overexposure car enthusiasts. available scale data. As they appear in * * * to rloise in the 90-110 decibel range . . . the brochure, the plans are highly de­ that includes screaming model engines, The 1975 Radio Control Buyer’s tailed and indicate suggested construc- as well as anything louder than a subway. Guide features pictures, descriptions, Continued on page 79

Ear plugs sold by Aerotique allow normal conversation, yet stop Versatile field box by Crystal Products, harmful noise. Measuring device assures exact fit.

JULY 1975 7

How to make a Cox .049/.051 look big . . . put it in a small airplane!. The fuel line looks like a smile on "Little Bomb.' LITTLE BOMB By Wm. R. Nielsen, Jr. . . . If you want to give Half-A Pylon Racing a try . . . and you really should, here's a fast building, fast machine for minimum wing area rules. There's a bigger wing if you have some doubts • Most modelers are by now familiar well as the flyer, with little hazard to Herewith are plans for one o f these with the most well known of Murphy's either. little beasts. You will notice they show laws, “ Anything that can go wrong will Okay, so we need RULES. Well, we a wing with optional panels (Chicken go wrong.” Few realize that Dr. Murphy, have ’em and we follow them to the Wing) for a less sensitive machine, but after intense study and lengthy applica­ letter!!! hardly a docile one. The shorter wing is tion, went far beyond the simple basics Rule One: No engine shall exceed for the more practiced flyer, and the for which he became so famous. .051 cubic inches. smaller radios. It is for the guy who One of Murphy’s lesser known laws Rule Two: Aircraft must R.O.G. wants things to MOVE, and it w ill! It is especially applicable, as well as in­ (Rise o ff ground). will also snap, roll as though with aile­ triguing. This law states, “ Man, at some Rule Three: Aircraft must remain rons, spin, fly inverted, and about every­ stage of his existence, is INVERSELY reasonably intact throughout the heat. thing else except knife-edge. All this on related to HIS PHYSICAL MASS.” This The present course is two-thirds that only elevator and rudder! is the only logical explanation to Jack of Quarter Midgets. We may increase Fuselage construction is simple; a Spratt, who could eat no fat, while his this to three-quarters, as it tends to get a basic box with formers, and pretty much wife could eat no lean; the little guy little tight at times, but then, since it standard. Noteworthy exceptions should with the monstrous car; and the Midget adds to the fun, why change? Excite­ be considered. After cutting out the who builds the ten foot models. ment is what we are looking for, isn’t it? Continued on page 58 Being a rather massive beast, I find myself especially susceptible to Tiny Toys, and .049 models seem to be a growing weakness (my wife calls it “ ob­ session” ). Advantages of the weakness (obses­ sion) are that at least the smaller models are less expensive to build, require less construction time, and are less likely to receive damage in a poor landing. If you can avoid tearing them up, they also require far less storage space, and use little fuel. They are, however, more d if­ ficult to fly than their larger brethren . . . and possibly even more fun. Here in South Florida, where we fly year ’round, we hate to spend too much time building, so small airplanes seem a natural answer. I have been flying these things for several years, and finally man­ aged to interest some of my buddies in joining the class activities. We call this Class “ 1/2A” Open Pylon and it not only challenges building and flying skill, Clean and simple lines of the "Little Bomb" are evident in this overhead shot. Long tail moment but is also exciting to the spectator as and forward balance point assure solid, groovey flight path . . . essential in racing.

JULY 1975 9 H o w to Race and Place a Slow Airplane By DANNY DOUGHERTY

• Read the title again. Isn’t that what FLASHH ROSSI .15R/C NOW we are all trying to do? Every day some­ LEGAL FOR QM PYLON ! ! ! one finds a way to go faster. We are all racing slow airplanes. What I am going to pfi v d k . present here is a system to win. The sys­ tem is one that has moved me from a consistent non-finisher to a third place, thing you can from it. If you crash, Technical Tip No. 2: According to QM trophy at the Nationals in 74. The build another like it. Why learn a new Mr. Brodbeck, K&B missed the boring basic ideas should be of some help to all machine? You know where the last one o f the ports very slightly on the sleeve of racers. It is not the ultimate, or I would was weak . . . beef it up. You know their .15 Schnuerle. To achieve a reliable win all my races. where there was extra weight and ma­ idle, the sleeve must be rotated clock­ The ideas have come from a lot o f terial . . . take it out. You know the wise in the crankcase as viewed from fellas at a lot o f races. The key to win­ “feel” of how it flys... don’t throw the top with the head off. You should ning is not speed, but consistency. How that experience away. Anything new see about 30 thousandths of the sleeve many really fast planes finish consist­ should be suspect unless it solves a on the right side when looking in the ently? Very few. What hurts them? Most known problem. Let the other fellow exhaust. The idle is reliable as long as win every race they fly, but, they don’t sort out his shiny new plane while you you have a good piston/sleeve fit. See fly every race. You can capitalize on are making ten laps outside with “ ole Figure A. consistency to put your plane in the reliable.” Another problem to solve at home is money at the Nationals and other races. Rule No. 1: Solve your problemsat ground handling. Main gear on a tail The best time at the Nationals was 1 home. Do not race with a known pro­ dragger should be one to two inches minute, 47 seconds. My best flight for blem. Set your idle at home. Adjust forward o f the C.G. You can make this two days was 2 minutes... I was flying only slightly at a race if you have a change on most planes easily. For posi­ a slow plane. change due to climatics (temperature tive steering, your tail wheel should be Let’s freeze your plane design and and humidity). angled back at 45°, with a long tail type o f engine . . . we will work on how Technical Tip No. 1: Super Tigre wheel wire (1 to 1-1/2 inches). Holding we race, not what we race. We work .15’s do not idle with a loose baffle. some up elevator will keep pressure on hard at our jobs, but sometimes we do It must seal. Light sanding of the brass the tail wheel and maintain steering not use the same care and thought at our throttle bushing will retighten a loose longer. hobby. You may say, “ But it’s only a baffle. See Figure A. Technical Tip No. 3: There are as hobby!” You’re right but you want to many as 1000 rpm in how the head win or you wouldn’t be reading this Brass bushing S.T. 15 bolts are torqued. Incorrect torquing article. We hobby for relaxation and will distort the case and cause minute enjoyment. Do you remember how re­ binding that kills rpm. laxing and enjoyable it was the last time Protect your investment in engine everything went right at a contest? Pro­ and time at a race by sizing your plugs per preparation can make all our contests and testing them before you race. Plugs like that. are not always threaded correctly and Let me quote the master, and one of you can strip out your head if you do the founders o f QM racing, Austin Left- Sand this face (lightly) to seal throttle. not re-thread your plugs. The proper wich, who raced Formula 1 quite suc­ size is 1/4-32 (no misprint). Get a die of cessfully before QM. He says, “ You FIGURE A this size and re-thread your plugs before gotta get around ten times, outside, race day. I every race, to win, and forget about K&B .15 -►* .030' Technical Tip No. 4: Change your going faster.” He is the thinking man’s plug every race. Modern glow plugs last racer and most of the preplanning ideas ■M a long time, but racing is hard on them. to follow are his. A new plug is worth up to 400 rpm on Remember we are using what you the first run. A lean run w ill usually have now. Stick with it. Do not change Sleeve ruin a plug element. Test your plugs airplanes or designs until you get every­ after you re-thread them. The reason for

10 MODEL BUILDER all helps, and you don’t have to modify your plane in the field to fit something you borrowed. On race day, you want to get there in plenty of time to try the fuel for idle. Remember, if you set your idle at home you do not have to adjust much when you get to a race. Cover your engine with a rag to keep it clean. Try to make your fueling system easy to operate. I use one pickup and one vent. I plug the two together after fueling. This keeps the nitro from absorbing moisture from the air (that costs revs), keeps dirt out, Southeastern Air Crafter's new p-51 for QM racing (314 Lamplighter Ln, S.E., Marietta Ga., and mostly, it avoids flooding the engine. 30062). Created by Tom Atkins, designer of the T-2A pattern ship. Rule No. 3: You must start every this is that the element is welded on the After the first heat, No. I plug goes time to place. Sounds pretty elementary, outside lip of the plug body and re­ back in No. 1 hole, etc. Now we have a does it not? How many starts have we threading occasionally breaks this weld. mechanical means o f remembering all missed? Figure C shows the starting See Figure B. whether we have changed plugs or not. battery box I use now. It is similar in It really is not as expensive as it sounds. principle to several commercially avail­ I buy a couple dozen plugs at a time, able starting battery meters, but it has a wholesale, by mail. An 8 heat race week­ couple o f advantages for racing, and it end costs roughly $3.50 in plugs and has helped me keep from missing a start saves many flameouts and “ no-starts.” for over two years. If you have trouble Dinner that evening w ill cost more, and on the line, time is at a premium. With we are out to win, remember? this box, instead o f carrying two bat­ Preventative maintenance is the key teries, you can just flip a switch for a to stopping a lot of grief, but “ preventa­ fresh battery. You need not disconnect tive installation” precludes the need for or unravel more plug wires. A bad meter a lot o f maintenance. Put silicone sealer indication on both batteries means a bad on motor mounting screws. You can plug. You have not wasted a lot o f time take them apart if you need to, but finding a second battery, etc., so you they will not vibrate out as quickly. have time to change the plug. If you use Always use lock washers, and Locktite only one battery, you will always have or epoxy where you do not anticipate a a “ hot start” when you need it. I have a need to disassemble. Use silver solder in spare plug, threaded finger tight into a place o f regular solder wherever you can hole in the battery box, where it is on linkages and landing gear. The secret handy. Try it, you’ll like it. One lead is in the flux. Sears-Roebuck sells a just wraps around the meter. The meter package of both for less than two dollars. picks up the current by induction but Rule No. 2: Standardize everything. does not add any load to the battery. Now that we have sized and tested I try to fly two identical airplanes. I The meter is not wired into the circuit. plugs, we must handle them carefully. We make a spare of everything as I build. If the meter reads backwards, wrap the need a holder made from 1/2 x 3/4 inch My usual three flying partners have lead in the opposite direction. The meter hardwood, about 3 inches long. Drill and standardized the hardware we use. Our is an old transmitter R.F. meter (Kraft, tap it (1/4-32) and number the holes. landing gears all have the same spacing Proline, etc.). The batteries are “ D ” cell (Or purchase a “Plug Caddy" as mar­ and mounting holes. This has bailed all nickel cadmiums. keted by SonicTronics. wen) I have o f us out at one time or another. It also Carry only a small box, with a starter several of these. On race day I find out means one fella doesn’t have to carry and battery, spare prop, starting battery, how many heats there are and fill one his whole workshop. Standardize on wrench, glow plug and screwdriver, to plug bar accordingly. I take the plug wheels, mounting, spinner, tank, etc. It Continued on page 75 out of the engine and put it in a box of plugs I raced once. I use these for prac­ tice and general running. The plug in the number one hole goes into the engine.

The author's twin-battery starting box with built-in plug tester. See text.

JULY 1975 11 Slightly enlarged Ace Pacer kit, reworked by Izzy Canales, of the Stone Balloon Hobby Shop, Kansas City. Mo. The lapped piston ST .15 has pulled the ship along at better than 100 mph, flown by TWA pilot, Don Frazier. Uses Ace Digital Commander servos. Photo by Michael Newburger, also of the Stone Balloon.

No matter what kind of frequency this equipment usually gets stolen. If ment. If their frequency is not being control you use at the local flying field, one club member assumes the responsi­ used they add their clip to the display. short o f having an armed guard at the bility of taking care o f them, the pins If it /s being used, they contact the other entrance gate who confiscates transmit­ will only be there when that member flier(s) on their frequency and proceed ters as you come in and only gives them comes to fly. And the most common to take turns. out upon receipt of a permit slip, in problem, no matter where the stuff is Obviously, all colors used should be triplicate, someone sooner or later will k e p t. . . someone, sooner or later, inad­ uniform. Different shades of blue and shoot down another flier by mistake . . . vertently walks off with a pin, or loses red could be mistaken for purple and It’s human nature to experience mo­ it in tall grass, or whatever. orange respectively. This might be an mentary memory lapses. The only thing The best solution we have seen to excellent item for an accessory manu­ a frequency control system can do is all o f this is for the club flier to have his facturer to make available. The standard improve the odds on the risk we all take own frequency c lip . . . When you’ve item adopted by the Forest City Flyers when flying R/C. finished rolling on the floor with laugh­ is a 1-1/2 by 3 inch plywood tag glued A t most organized contests, frequen­ ter, pull yourself together and read on to a wooden clothespin. The entire as­ cy control is quite efficient. Transmitter . . . The idea has been adopted by the sembly is then painted in the color(s) impounds, coded clothespins, the regis­ Forest City Flyers, of London, Ontario, of the individual’s frequency. If one tration o f contestants and their frequen­ Canada, and is described in their May type became universally standard, a vi­ cies, all o f these factors improve the odds 1975 newsletter, edited by Larry and siting flier to a club could join the group tremendously. The real danger lies at the Ruth Barrett. Here’s how it works: without any frequency confusion. home field during informal flying acti­ Each club member makes his own * * * vities. There is (usually) no impound, no color coded frequency clip, and to be While on the subject o f frequencies, registration, and often times, no clothes­ uniform, a standard construction method it comes to mind that the radio bands pins. is specified. When he is at the field, the used by R/C modelers, particularly 72 When used for informal flying, the member hangs his frequency clip on a mHz, are available because of the ef­ coded clothespin system is pretty ef­ designated frequency control board, forts of the AMA/Frequency Commit­ fective. Most clubs, however, have the fence wire, pole, or whatever any time tee. With the help o f this committee, same problem about this. Where do you he is using his radio . . . to fly or to test. and our "man in Washington,” Jeremiah keep the pins and the pin rack when it ’s As other fliers arrive, they check the Courtney, constant pressure is being ap­ not being used? If left at the flying field, clips on display before using their equip­ plied to protect these bands, and also to

Jack Stafford "hefts" the experimental super-light molded foam Ernie Huber (It) and Mike Bosch "hover" over the new Kavan wing core produced by Matty Sullivan. Scene is the 1975 MAC show. "Alouette". Both flew demonstrations at the MAC show.

12 MODEL BUILDER Vern Ahlberg, Oregon City, Or., checks his Midwest kitted Pitts Spcl., The Trident II, by Probar Design, Escondido, California, is cleaning powered by Ralph Cooney-built custom 60. Bob Yorkson photo. up in 36-600 class R/C yacht races. Styrene hulls and decks. find new, safe bands on the frequency control equipment. The other 20 to 30 budget a certain percentage o f their dues spectrum that can be set aside for R/C. percent is comprised o f car and boat income toward this worthy cause. Re­ Although the Frequency Committee enthusiasts. Judging by the rapid increase member the old “ United we stand" bit. members are volunteers, and do their in popularity o f power and sail boating, The total power o f all o f our organiza­ part on a free basis, Mr. Courtney is a and the slower but steady increase in tions combined in a single effort should lawyer who has been retained for a fee R/C auto racing, it is hard to fix the make us much more effective. to act in our behalf and carry our desires exact percentages. We invite the heads o f all non-aircraft, to the FCC. "For a fee” means money No matter what the ratio of usage, it R/C oriented national organizations to . . . and to the best o f our knowledge, all seems to us that the R/C car and boat contact us on this matter. Send us your of this money has been contributed by hobbies have undoubtedly gained enough comments and suggestions toward the aircraft modelers. in relative size that they should now idea o f joint support of our Frequency By no stretch o f the imagination, make an equally significant contribution Committee. R/C aircraft modelers undoubtedly re­ to the frequency maintenance effort. NSPA = MABA present something in the neighborhood We’d like to suggest that organizations The most recent newsletter from the of 70 to 80 percent o f the users o f radio such as ROAR, NAMBA, AMYA, etc., Continued on page 88

Winner of Sport Scale at Henley was this J-3 (Sig kit) by Orrin Winner at last year's Henley Aerodrome scale rally (see 'Workbench") Crooks. Owner of big one wanted to make even swap! was this Bucker Jungmann by Monty DeMara, Kelowna, B.C., Canada.

JULY 1975 13 Try this on your Formula I racer! A group of Half-A's get off to a flinging start. A Quickie 200 grabs the lead from 3 Half-A Sticks. HALF-A PYLON at Valencia By LARRY RENGER . . . Half-A pylon racing could be the most popular R/C sport to come along since gliders started their upswing. It's for the grass-roots R/C clubs . . . and that's where most of the action is.

• Up the San Diego freeway from L.A., 2. Hand launch and fly 10 laps to and o f course your own “ Man from toward Bakersfield, is a lovely area called the left around two flags 300 feet apart. Model Builder” present. the Valencia Valley. There are a few 3. Have fun! Racing throughout the day showed a research type companies tucked away It makes for very pleasant contests. . . level o f real excellence. The howl o f high there, and even Magic Mountain . . . sort there isn’t anything to protest! nitro-pressurized Tee Dee engines and of a Disneyland North. Also lurking in This particular race day, May 18, the sight o f fast laps being flown com­ the underbrush is the Valencia Valley 1975, there were seventeen fliers, and pletely dispelled any suspicions that this Headwind Model Club and its private most of them flew four heat races apiece. was an event for hackers. Peeking over model airport, with a 300 foot paved That’s a lot o f flying! Despite the high shoulders, the best flyers seemed to be runway. Once a month these pleasant level o f activity, the race went o ff very pulling 21,000 out o f their engines on gentlemen get together and fly 1 /2A smoothly and you never in your life trimmed 5-1/2 x 4 props. Nitro content Pylon racers. And therein lies our story. saw so many racing pilots actually en­ was as high as 65%! Plugs were good for The rules they use for racing are ex­ joying themselves! only one flight the way they were using ceedingly simple: Racing starts at 9:00, so an early drive them. 1. Engine displacement must be .051 from Orange County was required. Your One truly neat feature o f 1/2A racing or smaller correspondent arrived at 5 minutes to is that there is only one engine made nine, and was pleasantly surprised to find the contestants ready to go right on time. After the first heat race, won cleanly by Ed Noulin with a superfast GMC 1/2A Stick, we scouted around to see the sights. Only a very few o f the models were scratch built. Numerically, the 1/2A Stick kit was dominant, with six of them entered. Next most popular model was the Ace Upstart, with three entries. Ron Clem had a couple o f his new Tigercat models out, and the Quickie 200 also showed up in a pair, flown by George and Bobby Baker. Some o f the scratch built models pre­ sent were a Pusher Tigercat built by Bob Finch, a very fast Mr. Mulligan built by Bob Selman from Fred Reese’s design, and an unnamed original by Tony Naccarato. A very pretty transparent yel­ low and “ Plumb Crazy’’ Miss Dara was brought by Phil Smith and flown by Pat Joyner. The pit line-up: Upstart, 3 Half-A Sticks, Ron Clem and the Tigercat, a glass and foam Upstart, Mr. Mulligan, and another Stick. Although a club race, there were “ fac­ machine. Cap ribs over foam core, then cover. to ry” reps from Cox, GMC, Clem, RCM,

14 MODEL BUILDER Four beautiful wire sculpture trophies donated by GMC Models' George Chabot.

is now available as a direct order kit Winners at Valencia (I to r): Tony Naccarato, Bob (LIAHO ) Janiger, Ben Strasser (holding from Ron Clem, 13001 Rose Ave., L.A., model), and Dene Jones. Sorry we didn't get name of young man with Ben. Ca. 90066, for $25. Despite super speed and smooth flying, the Tigercat didn’t that is useful, and that costs well under successfully too! One unique modifica­ take home any hardware. Ron flew into $20. We are speaking, o f course, o f the tion was the addition of a ball thrust the lead by as much as a lap and a half, Cox Tee Dee .049. Many sported Kirn- bearing for George Finch’s pusher engine. then ran out o f fuel at 9-1/2 laps. . . in Kraft needles and backplate pressure The fastest two aircraft on the field three heats! Talk about frustration! Still, conversions. A t least one racer used a were the Tigercats. A super-clean design an incredible performing plane. pen bladder for fuel supply, and quite with a glass fuselage and foam wing; it Continued on page 77

Dene Jones prepares to launch Bob Selman's Mr. Mulligan. It looks A fairly large bunch of people turned out for this Halh-A race. An bulky, but was quite rapid in the air. Fred Reese's design. indication of its rapidly growing popularity.

Built from a Tigercat kit, this pusher had a ball-bearing engine. Yellow and "Plum Crazy" purple Miss Daragets its nose twisted by Owner George Finch was very careful when hand launching! builder Phil Smith. Pat Joyner was the pilot.

JULY 1975 15 A This Lockheed L-286 took first place in the helicopter class at the 1975 MAC Show. It was built by Don Harris, who also made the fiberglass fuselage. It is based on the Schluter "Gazelle" mechanics. A beautiful machine. CHOPPER CHATTER By JOHN TUCKER • A few weeks ago, I was overjoyed to our weekly outings at the local flying carton and the fuselage is “ crated” sep­ receive my copy o f the new MicroMold site! Being of sound mind and lazy atti­ arately. The Lark, however, is neatly “ Lark” helicopter kit, and immediately tude, I acceded to his wishes and let him tucked into partitions, including a plas­ started a review o f this cute little bug. build it! I’m a little sorry now ‘cause it’s tic parts tray. The construction phase Because of an extremely heavy work­ such a fine flyer and I have to tell the was started by carefully reading the well- load with the airline business, I managed spectators that someone else put it to­ written instruction booklet and checking to “ con” my son Kim into building it for gether. Anyway, here’s the story w ith­ o ff the parts and pieces against the list me. “ Con” isn’t exactly the right word out going into construction details: in the back o f the book. Everything for it, since he really insisted he tackle MICRO-MOLD LARK checked out fine except for a small piece the project... otherwise, I’d have to do A t first glance, you wouldn’t believe o f balsa wood and the timing belt, which all the loading and unloading of our that a complete helicopter (including was missing. A quick call to the dealer equipment for the next few months on fuselage) could possibly be packaged in­ (Model Helicopters, Inc.) immediately to such a small box . . . Usually, the mechanical parts are packaged in a huge

Mike Bosch came from Germany to astonish Cliff Cottrell’s Bell UH-1C, based on the Ernie Huber demonstrated the new Kavan the spectators at the MAC Show. Kavan Jet. Graupner twin jet 212 kit. Alouette, soon to be available.

16 MODEL BUILDER "Hold 'er, Mike, she's a ratin'!" Mike Bosch sets trims before demon· Graupner's latest, small helicopter , the Bell 47G, is a shake-the-box strating long periods of hands-off flying with Kavan Jet Ranger. type, quickly assembled kit. This type is becoming very popular. solved both problems with replacement, transmitter, which has been in constant sequent dozens o f blade-flapping, and Kim was off and running! He didn’t service for the past two years. Secondly, ground-slamming flights. I guess I’d bet­ hurry the building in the least and com­ Mr. York Daimon, o f Futaba Industries, ter explain this latter b it... the com­ pleted the project in less than a week o f Compton, Calif., had exchanged my early pleted chopper has proven to be so easy evenings, about 10 to 20 hours of easy model receiver and servos for the later to fly and so difficult to hurt, it has been assembly, and painting. version 1C compact and the new high used as a basic trainer for checking out The radio installation consisted o f a output servos, with the request that I many would-be chopper pilots. In this new Futaba FP-R5D, second generation try the rugged system on my next chop­ role, it really takes a beating, but comes radio system, with four FP-S5 servos. per. Needless to say, the complete in­ out on top every time! We chose this system for two prime rea­ stallation was perfect for this small size According to Kim, the only difficult sons . . . first, I had been extremely cockpit, and the radio has performed part of building was the identification of pleased with my Futuba single-stick absolutely without flaw during the sub- the British (system) machine screws and nuts. We later secured the data which explained how they numbered their screws, but only after it was too late. Actually, it wasn’t much of a chore to use common sense and fit the correct size screw in the proper place. On the other hand, if you’re the type of builder who always ends up with a round peg for a square hole, you might do well to ask a machinist friend to help out (like we did!). Within a few days o f starting the kit, my good friend and expert chopper pi­ lot, John Gorham, o f Thousand Oaks, Calif., called me and said he had just completed his Lark and was flying it Our "Chopper Chatter" editor hovers the Lark The little Lark is from an English kit. Power is around in his back yard. The real reason as his son, Kim, watches. Very stable machine. hopped up Veco .19, Futaba radio. Continued on page 61

Close-up shot showing the drive mechanism of the Lark. Cooling fin Super-simple head mechanism of the British-designed Lark certainly attachment appears to be from race car accessory line. should keep maintenance to a minimum.

JULY 1975 17 The completed Airtronics "Aquila". Test ship is finished in all yellow, paint and Monokote. Futaba FP-6EN transmitter, comes with meter. New red, white, and blue MODEL BUILDER decal on the rudder. ratcheting trim levers, buddy-box button, and interchangeable crystal arrangement. PRODUCTS IN USE AIRTRONICS "AQUILA" and the FUTABA FP-6EN RADIO SYSTEM By TAYLOR COLLINS

• When I first saw a prototype o f the spruce spars, spruce leading edges, and covering, radio installation, everything Aquila (Spanish for eagle) it was love at 1/16 inch balsa sheeting on the upper . . . was done in a motel room. I did take first sight. The large, thick winged, low surface leading edge. The bottom sur­ pity on the room maid and borrowed a aspect ratio, standard class birds were face is sheeted at the center rib bays, vacuum cleaner to sweep up the saw­ winning contests, but purely by virtue but the remainder uses full chord cap dust!). of their astounding performance on tow strips rather than leading edge sheeting. Wing tips are carved from balsa block, . . . their sheer size gave them a decided­ The balsa shear webs, which are used to achieve the upswept, inverted Hoerner ly higher launch than the more graceful, both in front and behind the spruce anti-vortex effect. I'm not going to thin wings o f some o f the old standbys. spars, come precut, requiring only minor plunge into the E.B.S. (a Le Gray term) The Aquila appeared to be a good com­ trimming to assure a perfect fit. I assem­ involved in the wing tips, but I will say promise between the two design types. bled the wing one bay at a time, using that they do look very nice, and they It uses all flying tail surfaces for both the shear webs at the trailing edge web are not hard to do. A curved piece o f elevator and rudder. This, coupled with to determine rib spacing and assure a 1/8 inch wire is epoxied onto the trail­ a fairly long tail moment, provides a tight fit. Both wing panels were built, ing edge o f each tip. This wire determines stable, yet easily controllable thermal ready to cover, on one rainy Sunday. the curvature and insures that you won’t plane. (Incidentally, the quality of the Air­ ham-handedly sand off the whole tip. The wings use a fairly standard O ' tronics kit was such that the entire air­ Then, with a piece o f sandpaper wrapped tube type construction, employing plane, including all sanding, painting, around the cardboard tube that Super

"Diamond" tail surface construction is strong, Futaba radio installation in Aquila. Third servo activates spoilers and releasable tow hook. Servo yet light and warp-proof. rails epoxied to glass fuselage. Note removable crystal. Twin Golden Rod pulling rudder cables. 18 MODEL BUILDER Trap door for interchangeable crystals in the The Aquila drifts overhead during a night flying demonstration. Stripes and lettering were cut back of Futaba transmitter. from "Scotchlite" pressure-sensitive sheet. Spotlight really turns it on! Monokote comes wrapped around, you need. taken from an actual wooden fuselage, sand the concave top of the tip. Presto The fuselage is incredibly light, but making the two versions interchangeable. . . . instant sex appeal! (The tips aren’t is strong as cast iron. The full length, The glass body is very strong and flex­ hard to cover... with the help o f a heat machine cut sides are of poplar plywood. ible, and due to the lack o f internal for­ gun that is!) The bottom, from the noseblock, to aft mers, is somewhat more roomy. A freak The wing is slightly poly-hedralled . .. o f the wing, is also poplar ply. The nose- crash on MODEL BUILDER’S prototype that is to say there is very shallow tip block itself is bandsawed to shape from wiped out the wooden fuselage. A call dihedral. The brass tubes in each plug-on pine (complete with a hole predrilled to Lee Renaud brought a replacement wing are angled so that a straight 1/4 for noseweight!). The top sheeting is glass unit, and the Aquila was back in inch music wire is used to join them 3/8 inch balsa, which allows enough the air after three evenings o f work. through the fuselage. This is a very nice thickness to do considerable sanding, Weight o f the two versions is about the feature. You can tell immediately, by giving a much more pleasing round shape same, but obviously, the glass fuselage looking at the wire, if your dihedral has to the fuselage. (Boxes are nice for mail­ can be completed in a shorter length of changed due to overloading on tow, or ing and burying things in . . . but not to time. from various types of aerial gyrations make sailplanes out of!) The kit comes complete with a mold­ that you have stumbled through. There The tail feathers are built up from ed, pressure sensitive adhering rubber is no guessing if your dihedral is changing strip balsa with spars on the outside of skid, and an Airtronics Deluxe adjustable from flight to flight. the structure (ala Taurus. . . remember towhook which is recessed into the bot­ The wing is equipped with spoilers that?). They are quick to build, strong, tom o f the fuselage. (which are included in the kit). To be and VERY light in weight. The all-flying I can’t say the Aquila flew right off perfectly honest, although I have the fin is hinged with molded nylon aileron the board, because it was built on a bar- third servo mounted in the plane, I linkage type hinges, and the all flying top in my motel room . .. but it did fly haven’t hooked them up. I had original­ stab is pivoted on l /δ inch music wires, w ithout any corrections. It is one o f the ly thought that I would wait until I had working through a molded bellcrank in­ best handling 100 inch sailplanes that I the plane trimmed out before I hooked stalled in the fin. All o f the fin assembly have flown . . . and that’s no E.B.S.. . . them up . . . now, after having flown the pieces are precut, allowing smooth fillets or I’ll eat my flying hat, L.S.F. badge plane for an hour or two, I don't really to be made, and making a finished fuse­ and all! feel the need for them. The Aquila han­ lage that looks as though it were molded The Futaba FP-6EN Six Channel Ra­ dles quite well at all speeds, and is no in one piece. dio system is styled after some of the problem to land accurately, w ithout any Incidentally, since the initial intro­ more exotic European radio systems. sort of glide path control. Sometime in duction of the Aquila, Airtronics has It comes with a neck strap, angled trans­ the future I may hook them up, but made an epoxy resin fiberglass fuselage m itter configuration, and interchange- that will be more out of curiosity than available. The mold for this fuselage was Continued on page 66

E.K.Products R/C releasable tow hook. Very By using twin "Brass Cable" type Sullivan Golden Rods, both pulling, the rudder control can helpful for competition flying. be made extremely precise and positive.

JULY 1975 19 SHEET I or Travel Air N-5290 after restoration. Note saxaphone exhaust and primitive airspeed indicator. Photo by Bob Hegge

rRAVEL AIR 2000 By PETER WESTBURG • TRAVEL AIR . . . the very name con­ jures up images of ancient biplanes float­ ing out of the mists of yesteryear into our nostalgic dreams. The name was sug­ gested by Walt Innes to Lloyd Stearman and Walter Beech; the three having formed a company in Wichita, Kansas, late in 1924, to manufacture a three-seat airplane calculated to make Jenny own­ ers wish they had one. From the beginning, the airplane was a success, the first one being bought right off Lloyd Stearman’s drawing board. It was called the Model 1000, and

it was quite conventional, with a 90 hp BEECH AIRCRAFT PHOTO OX-5 engine, two staggered wings, and This restored 2000 is one of the most authentic of the resurrected Travel Airs. IM-6282 is finished a straight axle landing gear. It also had in medium blue on the fuselage, vertical tail and landing gear, while the remainder is silver.

The first Travel Air, the only 1000 model. Designed by Lloryd Stearman, it had a straight axle landing gear, and the first welded steel tube fuselage designed for commercial airplanes in the U.S.A.

JULY 1975 21

Close-up for detail on a restored T.A. 2000. Note the rear control stick protruding from the bottom. Also, this one doesn't have the "eggshell" covers over the rigging terminals. Gotta say it . . . this is the MB editor's favorite biplane! two features deliberately designed into intentionally reminiscent of the Fokker, pany, nearly one thousand being manu­ it to remind pilots of the Fokker D-VII and it soon became known as the factured. The 2000 had a wider fuselage of WW I fame, then as now, a highly “ Wichita Fokker.” and a split type landing gear. The wings regarded airplane (and at that time, only Only one Model 1000 was built; were also rigged with more stagger to 6 or 7 years old!). It had overhanging Stearman made so many improvements improve balance, and many minor im­ balanced ailerons. . . but even more eye that the next airplane was called the provements were made. catching was the hook-shaped rudder. 2000. It is the best remembered Travel Standard colors for the fuselage, em- The overall appearance of the 1000 was Air of the many produced by the com­ Continued on page 85

A Hisso powered T.A. 3000 in its movie make-up as a Fokker D -V II for "Men With Wings." Even before this, the T Air had been designed after the well-known D -V II, a highly regarded airplane among pilots of all eras. Appears to be a Fairchild 51 in the background. MB has plans for both.

JULY 1975 23 ft/c S O A R I N G This month we are visited by the Dean of Model Design, who explains the reasoning behind the JASCO glider airfoils that we have been taking for granted these many years. By FRANK ZAIC

• Have you ever wondered how a par­ So, I modified the trailing edge by hav­ pares with those that were tested in a ticular airfoil gets into circulation? Here ing it lie flat on the building board and wind tunnel. Basically, as you may have is the background on the NACA 6409. merged the undercamber to fit. This found out, any outline that “ looks" like NACA 6409 airfoil was one of many change was fine for sections having a an airfoil will behave like an airfoil. shown in the NACA Report No. 460 chord o f 6 inches or more which pro­ There may be very small difference be­ which'was published in Nov. 1933. I vided ample spar room. But for narrow­ tween what you have home made, and a first saw this report in the New York er chords, the cambered section be­ tested airfoil which looks similar to Library, and I added it to my collection came too slim for good strong spars, yours. In fact, as long as you use a flat by sending 15 cents (!) to the Govern­ especially if made from balsa. Under bottom type, you can’t go wrong. But ment Printing Office. While looking it such circumstances, I decided to modify when you start to use a deeply under­ over for what we could use for models, it still more by making the bottom flat. cambered variety, you may have stability one o f my friends, J. P. Glass, remarked The modified 6409 now looked al­ and flying problems which could be most that 6409 looked good. And so, 6409 most like a Clark Y, but it had a much unusual. With a flat bottom 6409 look­ was introduced to model builders in the smaller leading edge radius, and the slope ing like a Clark Y, it should have similar 1935-36 Year Book, which was pub­ o f the upper front portion was more characteristics . . . or does it? lished in 1935 . . . In retrospect, the gradual. This shape made it possible to Sometime in 1973, I heard rumors 6409 was a good selection, as its basic use square stock (set in diamond posi­ of a low speed windtunnel operating characteristics, small leading edge radius, tion) for-the leading edge without having somewhere in Italy. I was going to check generous camber and slim section, are deep depressions between ribs. Note the for it through my Italian connections, now the rule on free flight models which edge spar location on the 12° base line but before I did that, I received a note depend on thermal activity for duration. to obtain almost symmetrical outline from Le Gray asking for particulars on I wanted to use the 6409 on the Ther­ with only slight edge projections which obtaining year books for someone in mic series o f glider kits which I was need not be removed, and which may Italy. I am not sure how it happened, developing in 1939. But I realized that act as turbulators. This modification of but the person interested in the books because o f its slim and angled trailing 6409 made it possible to use simple and was Ferdinado Gale (pronounced “gol­ edge, 6409 was not the easiest section basic “ladder” type of construction ly ” ), who was president, at that time, to duplicate, especially if the potential without penalizing the performance. The of the “ Unione Sportive Aeromodellisti builder was a newcomer (In kit design, front spar is located at about 30% of Lombardi.” (Ferdy Gale was visiting the one must assume that the model may chord and rear spar at 60%. U.S. on business. He is the European be built by someone who may have When you modify or "zip” your own representative for an American company never built or flown a model before.). airfoil, you always wonder how it com- headquartered in Palo A lto, California. He’s a strong LSF member, and official coordinator of LSF activities and PR in Italy . . . Very active in development of the task type competition for Italian soaring, almost identical in concept and quite similar in detail to current U.S. .10 40 AMA tasks . . . although this was done without knowledge of U.S. activities. LG.) Some of the USAL members made and operate the low speed tunnel I .09 50 S heard about. ο It was not long before we were talk­ on ing about testing the flat bottom 6409. Normally, the charge for testing a new .08 60 gο airfoil was about $50.00, plus. This in­ n: cluded the test wing. A most generous ο bargain! However, in my case, we traded year books and FLOATER G-110 kits .07 70 for the tests. In the meantime, Mr. Gale C.P. sent me the ASA Report 03-72, which featured wind tunnel results o f 16 po­ pular airfoils, including the basic NACA 6409. This particular report can be had, .06 but those of you who are used to the NACA system of showing the airfoil characteristics will have to learn a new style, which is not difficult to pick up. .05 (From Associazione Sportiva Aeromod- ellistica, Via S. Giovanni Bosco21, 20081 Abbiategrasso, Milano, Italy. Ask for "A irfo il Sections for Flying Models,” .04 A.S.A. Test Report 03-72. It includes the Clark Y, Eppler 385, Eppler 387, Eppler 392, Fukada 10, Gott 496, Gott 500, Gott 546, Hill SR2, NACA .03 0009, NACA 0012, NACA 4212, NACA 4412, NACA 6409, NACA 6412, and BO 545-310. Check on current avail­ ability and price first. The price in 1973 was about $7.00.) -4 -2 0 2 4 The report on the modified 6409 was made in Dec. 1973. The results ANGLE OF ATTACK IN DEGREES were presented in their system. I con­ verted them to NACA system as shown. camber, but flat trailing edge, is desig­ have minimum sink. But when you have I had the NACA method checked by nated as MZ6409. The new coordinates a bit o f a breeze, MZ5411 is the one to Mr. Enrico Gallazzi, who did the wind are given. Also note the difference be­ use. This difference was demonstrated tunnel tests and he found the "transla­ tio n ” good. tween the basic 6409 and the modifica­ by Jim Baugley and Percy Pierce, o f In checking the modified 6409 against tions. Suffolk, Va. They slope soared at K itty the Clark Y (which was published in In practice, MZ5411 is a good all Hawk dunes with a Thermic 100, which the ASA report and thus having same around airfoil for R/C gliders and pow­ has MZ6409, and Floater G-110 which test standards), it was found that the ered models. It is not as good for light has MZ5411. They found that the Float­ values are almost similar. The Clark Y thermal activity as the MZ6409. The er would gain headway in a 20 mph has a bit higher values of L ift and Drag undercamber type has better L/D values wind, while the Thermic 100 could only at same angles of attack as the Modified at 5-6°, at which most o f the gliders do so at 15 mph. · 6409. In fact, a degree of shift of Clark Y to the right would superimpose the values. This difference is very likely caused by a slightly thicker Clark Y, which would increase the zero lift angle . . . So that we can say that the two sec­ tions are almost similar. The main ad­ vantage of the Modified 6409 is that it is more adaptable to model plane con­ struction to obtain true airfoil shape without sheeting, etc. In reality the 6409 has been modi­ fied to a point at which it could not be traced to the basic 6409. For that rea­ son, the flat bottom version has been designated as MZ5411 . . . And to fo l­ low the trend, the version with under­

JULY 1975 25 A "How not to" photo. Foxy Lady II, the author's EC/12, showing Maxi-Roach. Main has corners which make reading leach shape a effects of too short battens, a slack main leach, and sagging jib stay. challenge! trimmed w ithout extra weight being put aboard. It also allows a much larger capacity winch battery to be used so that you never need have fear o f running out of juice in the middle of a regatta. It sounds as though you could run a whole season on some o f the monsters Chip told me about. He is also capable of providing packs for the scale minded who often have special requirements • As sailing has grown more and more, competition oriented types are ordering from the standpoint o f space and size. special needs o f the skipper are being winch and radio battery packs configured All the packs are custom made to the met. The latest on the list is the avail­ to slip down into hollow keels, or to skipper’s requirements, so discuss your ability of special battery packs from nestle low in the bilges o f their boats. specific needs directly with Chip. Chip Bullen, 9921 Haitian Drive, Miami, This allows the center o f gravity of the Southern skippers will be happy to Fla. 33157. Chip tells me that lots of vehicle to be lowered, and also to be learn o f the formation o f the Atlanta

Here it is again, the author's Yankee on a JG Products' radial jib fitting. For proper operation, the jibstay and the axis of the jib club close reach. swivel must be parallel. On the Yankee, this required a shim, as shown.

26 MODEL BUILDER 1975. In winds of an honest, steady 20 It is just too small for that kind of knots, with measured gusts to 30, she weather. We substituted a SOLING rud­ managed a solid third place, only a 1/4 der on the following day, and had no point out o f second place. (It might be trouble tacking in 25 knot gusts when noted that we assisted in the earlier ever we pleased. For winds under 20, the repair o f the second place boat. No lack stock rudder is just fine, and for light air, Fred Noesner's Cat-Boat. Was seen at the 1975 of sportsmanship at our lake!!!!!) We it is a necessity in order that wetted WRAMS R/C Show. A real beauty. moved all available batteries into the surface be kept to a minimum. The hull Model Yacht Club. Contact Gene Lan­ stern in order that planing could com­ should be ballasted nose down for the ders, 243 Ponce de Leon Ave., N.E., mence as early as possible. same reason. The tip of the rudder still Atlanta, Ga. 30308, for information on The only problem encountered was a has enough grip on the water to handle classes and meeting dates. From the list general hesitancy of the boat to tack. her well under those conditions. o f charter members I saw, this will be This was traceable to two causes. First, In order to acquire better control on one of the biggest clubs in AMYA before the chop existing on the lake made it the main leach tension, I have put an 18 long. They will be sailing with the Savan- quite hard to maintain boat speed while inch main boom on and have exited the nah/Tampa/Miami clubs and should be tacking, since the plumb bow of the main sheet through the deck, aft o f the well represented at the EC/12 ACCR on YANKEE acts like a wall to the advanc­ after hatch. I have a tendency to think Aug. 2 and 3 in Savannah. ing waves. One definitely had to pick a that we will eventually fit a traveler to Our YANKEE entered its first regat­ time to tack when the waves were smal­ both the jib and main on this boat. We’ll ta. This was the first of the Capital R/C ler and the wind not gusting. The second have plans for a simple traveler to build Model Boat Club’s 50/800 series for problem was the sheer size o f the rudder. Continued on page 77

Look at the size of that hinged, barn-door rudder! Propeller for Production Huson 36/600. Looks like a IOR half-tonner. Can't auxiliary drive appears in this photo. imagine who it belongs to! Will have to ask Rich Palmer.

JULY 1975 27. It's Hadley Field, Plainfield, New Jersey, at a Kresge sponsored contest in June, 1939, and Al Heilman, now president of the SCIFS (So Cal Ignition Fliers), was there with his Megow Flying Quaker. In front of him was Jack Findra and son. Can you identify any of the others?

p m SPARKS By JOHN POND smug enough to figure they could out- ounce o f fuel per pound of model, up to glide the gas model anytime. a seven pound lim it. These are the rules In 1933, the boys really got a shock that have been preserved, although the • TEXACO! What memories that name when Bassett won everything; the Mof­ Texaco Event did reduce the allotment brings back! Best part o f it all is that the fett Memorial Trophy, the Stout Out­ o f fuel in later years. SCAMPS have successfully revived and door, the Mulvihill, and the brand new Just to show that he could also do it continued this wonderful event. event for gas models based on the 1932 on fuel allotment, Bassett promptly won For those who are a little in the dark showing. What the boys overlooked was the 1934 Nats! The win was followed about this event, a short historical sketch that when Bassett needed a longer flight, by Leo Weiss in 1935, Frank Flush in is in order. Maxwell Bassett showed up he simply put in more gas. Needless to 1936, Fiske Hanley in 1937, and again, in 1932 at the Atlantic City Nats with say, gas models were banned from all Bassett in 1938, for a fitting wrap-up of the first gas powered model to be used rubber events thereafter! This left the the event. In 1939 the fuel allotment in competition. The model was rather Texaco Trophy, as sponsored by the event was abandoned in favor o f limited small and fast. Despite this, Bassett Texas Co. as the gas trophy to win. engine runs. The Texaco Event was placed fourth. O f course, the glide was In March 1934, the new rules for gas withdrawn and lost in the files until the terrible and most rubber modelers were models came out, which specified a 1/4 SCAMPS decided to revive it.

Newcomer to SAM 21, Vernon Schultz, Sacramento, and his first Another SAM 21 member, who won Class B on his first try at a con­ R/C Texaco model. Miss Philadelphia V I. Real pretty job. test. Tom Bristol and his . . . see next page! 28 MODEL BUILDER Dave Deadman and Mike Beach (Beach's Flyer, Jan. ·75 MB) collabor­ ated on this 1935 Col. Bowden "Mouse." Dave’s 1925 Austin 12/4 provides a classic background for a classic model! What dihedral!!

The "dynamic duo", Stephanie and George Perryman, with Gollywock and Calif. Champ. Tough competition all around!

The writer was contacted in regards themselves a real hot dog! According to the story, Charles to finding the whereabouts of the orig­ ENGINE THREE-VIEW Brebeck, Sr., a highly successful business inal trophy. After considerable digging, This m onth’s engine 3-view features man heading up an auto parts and truck he found that he had contacted Frank the OK Super 60 motor as manufactured repair company in upper New York, was Ehling, a week too late, as Frank had during the post-World War II years by interested in manufacturing another pro­ tossed the old trophy away in a cleanup the Herkimer Tool and Model Works. duct. When his boy, Charles, Jr., showed o f AM A Fleadquarters, where the trophy had resided for many years. In less time than it takes to tell, the SCAMPS repro­ duced the trophy. John Keller (now de­ ceased) was the first winner of the mod­ ern revival. Hardly seems possible that it was nine years ago! Although plagued with bad weather at Taft (probably the only field suitable for Texaco), the ninth SCAMPS Texaco Event was staged in the early morning o f April 6. Actually, by way of explana­ tion, the original SCAMP Texaco Event was run all day, with Sal Taibi staging a “ Dawn Patrol” Event. The Dawn Patrol became so popular that the Texaco Event was run only during that time. No longer were one hour plus flights possible, as the thermals simply weren’t that strong at that time o f the morning. This year, Jim Adams won for the third time, with his Ehling Contest Win­ ner, Mighty Midget powered . . . a sur­ prisingly good combination. Flis 27:05 flight was followed by Pond at 19:13 and Al Heilman with 17:07. Incidentally, Al Heilman is getting to be a real hot shot, by taking Sweepstakes in the regular portion o f the SCAMPS meet with a first in Class A and second in Class B. In the next contest, the Ocie Randall Memorial, April 19-20, Al Hell- man placed second in Class A, and sec­ ond in 30 second Antique, to again walk o ff with Sweepstakes honors. Wotta President! The SCIFS have got Drawn by TEX NEWMAN

JULY 1975 29

Andrew Kovacs, Norwell, Maine, built this R/C version of the famous Bombshell, our OT of the A Cannon radio supplies the "returning urge" month. It's a beauty in black and red with yellow trim. Power is an Enya .35R/C. for Andrew's Buzzard. Note watch on Tx. BUZZARD BOMBSHELL OLD TIMER Model of the Month only manufactured model airplanes (and still is a model that the non-model­ Designed by: Joe Konefes available with a “ string attached” ), and ing public could recognize as an airplane; Redrawn by: Phil Bernhardt only a few radio controlled models . . . a fuselage with cabin and windows, a Text by: Bill Northrop everything else was free flight gas, rub­ wing sitting on top of that fuselage, tail • The Buzzard Bombshell has become ber, and glider. The Bombshell design surfaces in normal position, and a two such a common sight at Old Timer con­ took 1st, 3rd, and 5th in Class C, with wheel landing gear. And from the every­ tests in the past couple o f years that we Joe’s own model appropriately taking day modeler’s point of view, it was some- simply felt there was no need to offer first on the strength o f a tremendous thinganyone could build ... sheet sides, plans for it. However, requests keep com­ single flight o f 49 minutes and 40 sec­ bulkheads, stringers, constant chord ing in, so why fight it? Based on its onds, all within the bounds of the flying wing, lots o f room and access for igni­ popularity, we’ve also decided to offer site! tion system. the very handy “ Stick ’em Patterns.” The BB was an anachronism in design All original Bombshells were balanced You’ll find full particulars on page 88. trends. Starting with Carl Goldberg’s at one third o f the wing chord from the Although it had already begun to Zipper in 1937, gas powered competi­ leading edge. Glide was corrected with make a name for itself in local Mid-West tion models had begun to look less and elevator trim . Three washers (under rear contests, Joe Konefes’ Buzzard Bomb­ less like an airplane; with almost no engine lugs) o f downthrust and three shell really came on strong at the great nose moment, wings propped up on tall degrees o f left thrust were used to pro­ 1940 Nationals in Chicago. Incidentally, pylons, and pencil-like fuselages support­ duce a solid left climb under power, the 1940 Nationals had 1400 entries, ing huge stabs. For at least a brief mo­ with rudder set for a right turn in the and there were no control line events ment in history, Joe turned the trend glide. A Brown B and 14 inch prop were (Stanzel’s “ G” Line models were the around with the Bombshell. Here was used on the original model. ·

Spiro Nicholaw caught in the early morning with his Ray Heit Jim Adams has won the Texaco Event three times with this Ehling "Scram." This was a Flying Aces plan. Contest Winner. It's an appropriate name. him one o f the early engines, Brebeck was widely distributed under the adver­ The popularity o f the OK engine was Senior went to work and produced a tisement “ A Snap to Start.” Properly limited, as most modelers preferred to new engine in two weeks that was com­ wired and hooked up, the OK 60 did have the timer more readily accessible parable (and superior in many respects) start easily, but was prone to give the in the front, despite its inherent danger. to anything being manufactured at that operator a sharp rap across the fingers OK engines have enjoyed a modicum of time. for improper operation, such as flooding, success to this date, and as pointed out Improvement followed improvement timer advanced, etc. OK 60 motors ran in previous issues, O.K. parts for most as various models were produced. The well on 14-6 and 13-6 propellers, their post-war type motors are still available Super 60 shown in the three-views was power being as good, if not better, than from Ted Brebeck, Box 40, Mohawk, introduced in 1946. This garden variety contemporary engines. N.Y. 13407.

JULY 1975 31 Spiro Nicholaw went ape with the red and blue spray cans on his Dave Coates about to launch his Megow Ranger at the 1974 King Comet Goldberg "Zipper." Hope it isn't catching! Orange Internats. Cochran photo. Incidentally, having started these three-views to assist modelers in deter­ mining what engine to use in their jewel, based on size and mounting arrangement, the writer has received several “ sugges­ tions” that an engine review ala Peter Chinn would be even better. We don’t have enough space for that type of tho­ rough report, but if you’ll suggest the specific information you’d like on every engine we’ll try to fill the bill. Also, in addition to many inquiries as what comparable size glow engine to use in place o f the original ignition en­ gine, a good rule o f thumb is to take 1/3 of the ignition engine displacement. For instance, a “ So Long” flew great on an Ohlsson 23. It will also fly beautifully on a Torpedo .09. For years, the w riter’s Gas Champ, originally powered with a .60 Cyke, won many contests using a Torpedo 23 glow engine. MB's editor and his Comet Clipper. K&B .29 Green Head was never used, and still needs breaking in. Full right rudder trips engine shut-off. Silver fuse and rudder, trans orange Monokote surfaces. Now engines converted from glow to ignition are another thing. Despite those fact was that Bill had a 5/8 bore, 9/16 the first time. who have claimed conversion doesn't stroke engine using a modified loop sca­ Keith emphasizes the fact that wheth- make that much difference, it does! The venging system. However, the real devel­ eryour engine is glow or ignition, a good writer suggests for easier handling models opment was a .60 with 15/16 bore and hot electrical system works wonders for you drop down one class, i.e., a Class C stroke with what is now called original ease o f starting. He does take exception Pacer will fly fine on a Class B converted Schnuerle scavenging! With a compres­ with trouble shooting ignition problems engine such as a Fox 29, etc. A Comet sion ratio o f 7:1 and a rotary valve in the spark plug, where this columnist Clipper belonging to the columnist flew crankshaft intake system and rear venturi recommended removing the plug and fine on a Torpedo 29 converted to igni­ intake, this engine, featuring the spark checking the spark in open air. Natural­ tion, whereas it was originally powered plug inserted horizontally into the finned ly, the plug may spark reliably (this is with an Ohlsson 60. Note that the above head, would have set a new standard for not a bad way to go), but when the plug ratings are approximate, and care should the motor industry. Truly a shame this is installed, the pressure inside the cy­ be taken not to overpower your model! radical engine never got o ff the ground! linder makes the charge act as an insu­ BILL BROWN - PEEPULS CHERCE! B ill’s biggest problem in engine de­ lator. Here is where a top shape ignition When this writer featured 3-views on velopment was financing. He surely system helps! Keith offers the following a Brown Jr (Model D), any remarks would have been number one a lot long­ advice on better starting qualities. made at that time were not to detract er! I know Bob Scarsdale told me to keep First, Keith says to disregard the from the great pioneering work done by my big mouth shut, as Bill is still a very usual advice o f gapping plug electrodes Bill and his Brown Jr motor. modest fellow. However, this writer at .015 inch, and instead, drop the gap Herb Scarsdale recently took the thinks credit should begiven where due, to .008 to .010 for more reliability. For writer to task for comments about the and believe me, Bill Brown is still the those lucky guys owning OK Twins and Brown E, stating that it was Ed Roberts, greatest in my book! the like, the gap is even more important. President o f Junior Motors Corp., who MORE ARC TO YOUR SPARK! Keith does not use more than .008 in. made the decision to go with this motor. Received an excellent letter from gap here. This reduces the possibility of When this ill-advised action was taken, Keith Bartram, o f Quebec, Canada, who the spark jumping down the outside o f Bill had already left the corporation and reads the Plug Sparks column (that the plug. was only acting as a consultant. makes two!) with interest, and no small Secondly, use nickel-cadmiums for It was during this time that Bill de­ amount of nostalgia. He agrees with battery power. Carbon-zinc cells do not signed and built a .12 cu. in. motor that most that has been written, but would have the same life line characteristic, was eventually produced under the name like to add the following for anyone being a linear degradation. Nickel-cad- of Lykens Brown. Also, a little known being exposed to an ignition engine for Continued on page 68 32 MODEL BUILDER Try this one on your aviation history fanatics! The TP-40 was developed during early WW-II, when green pilots kept nosing over and breaking hard- to-get props. Field mechs cut in an extra cockpit and added the nose wheels. Researching this one was a bit difficult. The plane was built by Stan Sands. Span 66, Fox 60 power, with throttle control. Photo and info by Bob Diefenderfer. Both members of Flying Dutchmen, Reading, Pa.

FROM THE HANDLE" ontrol line By JED KUSIK

• So what’s new this month? Very lit­ Considering my general lack of inte­ tle, if anything at all. It’s been a ho-hum, rest in model airplanes this month, I non-descript month. At least for me it went motorcycle racing instead. Every­ was. I attended two contests and just one should have a second hobby o f equal watched. The trade show at the Ana­ interest to them personally, it really heim Convention Center failed to im­ helps keep the spirit alive. If it were not press me with all the new R/C equip­ for my good friends who supply me ment. The only spark of light for me at with information, I would be finished the show was a new .15 speed and racing writing now. engine from Japan called the HGK-1, M.A.C.A. COMBAT STICKIES and being imported by Shamrock Im­ The Combat Association now has an ports. It is Schnuerle ported and claims emblem in decal form. It’s very attractive 30,000 rpm. It was quite interesting, and belongs on all good combat planes. built a little different from most. I’ll (It wards o ff evil bellcrankings.) The save comment on the rpm, as I have to emblems are available from Tom Sou­ see it on my tach to believe it. thern at 2207 Paul, Longview, Texas

Neal White and his own design combat ship, Gary James (It) and Greg Turpin are co-design­ Bosta. Photo by Tom Zon. ers of the Shrika II. Tom Zon photo.

JULY 1975 33 C/L editors original profile Curtiss "Swift", designed from 3-views Dale Long, Riverside, Cal., pitted for Ken Mogi in Slow Rat at in Air Force historical book. Span 42 inches. Fox Combat .35. San Jose contest. 75601. Price is 10 for $1.00. Rich “ Von” Lopez, the combat di­ rector for the Western Associated Mod- delers has provided all WAM member clubs with specific instructions for mak­ ing streamers. That way, hopefully, all WAM contests will have well made streamers in abundance. “ There should be 250 A and BC streamers.These guys take a long time to makeup properly, so plan to make them way ahead o f time. Do not do it alone; 3 or 4 people should work together on this project. Allow yourself 4 or 5 hours to make them. “ Materials and tools required to make bat team. Maybe it will all come toge­ attaches a tail wheel to a piece o f brass all o f these include: yard-stick, felt pen, ther next time. tubing with a m/w strut, it is bound large and small shears or scissors, one CARRIER HOOK UP . .. (OR DOWN) with copper wire and soldered. The tube roll o f 1-1/2 inch masking tape, one Most Carrier pilots practice Carrier is then slipped onto the arresting hook hole puncher, stapler and extra staples, without the benefit of a proper deck, and crimped in place. As the hook re­ enough thin cardboard to make 250 and probably have the same problem I tracts on landing, the wheel rolls and cards (1-1/2 inch square), 22 packages had when I played with the event some allows a normal landing and takeoff. o f good quality crepe paper (Dennison), 10 years ago. The problem was that the Very clever and very simple. 1,250 feet o f kite string (Northern Paci­ hook would hang up on grass and weeds, Joe receives the “ Oh, by the way” fic #5131 or comparable type). Make or rocks and cracks in pavement, and it commendation for this month. sure you get good quality crepe paper, was not possible to touch-and-go many NEW PROPELLERS FOR 75 it has to be the close weave type. The times without a helper to release the Rev-up is getting better! Hard to be­ large open weave type is no good for our hook from the trash. lieve because they are already the best. purpose, it shreads while being pulled )oe Koch, o f Levittown, Pa., sent in The new 75 props are thinner and slim- along. Get as many different colors as a super simple cure for this problem. He Continued on page 56 possible. “ The streamers should be made in this manner. Using the yard-stick and HP K8

34 MODEL BUILDER f upon. The mechanism itself must be as free from friction and binding elements as possible. Otherwise, more weight will be required on the pendulum. Here is one o f those rare cases where it pays to have a little slop in a system rather than a tight fit. Start by constructing the two bell- cranks from 1/64 plywood and 1/16 dia. aluminum tube, as shown on the plan. Tubing should be secured with epoxy, being careful not to get epoxy in the tubing. Make sure the axis o f the tube is perpendicular to the plane o f the bell- crank. While this is curing, form all of the wire parts. Tails on the “ Z ” bends which go into bellcrank should be rather long so as not to hang up on slot in R-7. The washers on main pushrods are af­ fixed with silver solder; also, note the bend, which is important. When the bellcranks have cured, at­ tach them, along with washers, to R-7 as shown on plan, being careful with the glue. They must move very freely and success or failure is very dependent upon the ALIEN By DANIEL WALTON this operation. Once the glue is dry, the outer wing panels may be built in the An interesting experiment in the use of pendulum control to maintain normal manner, starting with R-7 push- stable flight in a somewhat tricky design. A total success! rods attached to bellcranks. Then slide each rib on over the rod, like a control • The initial concept for the control climb and glide, and (lights average about line model. Also make sure R-l is jigged system incorporated in the Alien was one minute on a full liquid charge. for dihedral, using template “ D ” . Wash­ the result o f a term paper. The system's CONSTRUCTION out is automatic because o f the tapered purpose is to correct for the tendency o f The keynote o f this ship is simplicity, wing. Just pin it 3/16 o ff board all the higher aspect ratio types o f tailless air­ because a simple plane is usually a light way along T.E. craft toward spiral instability. Although one. The Alien is no exception, with a Center section is built over plans, two years lapsed between the term paper total finished weight o f 1.3 ounces, removed and then sheeted on top side and the construction o f the Alien, it trimmed and flying . . . so when building, only. Now glue on front support and cut was always felt the concept was viable keep it light. out pendulum shaft hole. Next add front if the mechanism could be kept light The only things which should be o f and rear 1/16 dia. aluminum tube bear­ enough. Since none o f the stock items stiff, hard balsa are the L.E., 40% spars, ings to assembly using epoxy, again available were acceptable, the system keel, and main longerons o f pod. These being careful not to get epoxy in tubing. must be custom made. It may seem to be really take a beating, especially the keel A t this point, insertion o f a piece o f a time consuming extra to make, but if area. Pod is basic box type, although straight .025 piano wire will aid greatly done well, it works like a champ. When you may wish to sheet the bottom (1/32 in maintaining alignment during cure. flying, it can be upset by some fairly sheet) for added durability. Allow this assembly to cure at least five s tiff gusts and correction is almost im­ Because of this simplicity, only the hours. The pendulum shaft should be mediate. Pattern is a wide gentle left pendulum movement will be elaborated partially bent so it resembles the letter

The Alien glides back to earth after a pendulum contolled power flight. Hmmm . . . wonder how Close-up of cockpit reveals wheel collar pend­ he got the prop to stop in a horizontal position? ulum weight and CO2 fuel tank.

JULY 1975 35 f % C inches 3 2 / f f i £ & __ Plan No: TTSa MODEL An·. Seme C*i«onu· Spurgeon. 1106 «2701 BUILDER MARCH MARCH 1,1975 -BRASS WASHER

FULL SIZE PLANS AVAILABLE - SEE PAGE 88 J3 Γ* D o m Γ­ ΟΟ c O m GO Total weight of the ship was held to 1.3 ounces, making it an easy The pendulum controlled aileron is hinged with "figure 8" thread job for the little Brown C O j engine to take it up. hinges . . . no friction! Note pushrod from pendulum.

“ J” . Add the washer as shown on plans. pull back, add bead and bend shaft been flown with both types, but you This is very necessary to keep the main down, making sure short and long arms may wish to mount a second tank. Twin push-rods from climbing the shaft. In­ are parallel. About 1/16 inch end play cylinder models seem to run 20 seconds stall by inserting into rear bearing from is also very desirable. Solder on 1/16 maximum with a single tank. The second T.E., with a slight bowing of shaft, and dia. brass tube and add wheel collar. tank should be mounted on the left side running through to front bearing. Now At this point, the wing is covered o f the pendulum shaft, m irror image the bottom is sheeted. with tissue paper. Shrink with rubbing fashion. Because o f its ready accessibil­ Assembly o f center section and panels alcohol and dope assembly. Finally, at­ ity, provision should be made for easy is done by inserting push-rods into cen­ tach elevons with thread hinges as indi­ engine removal. One o f the new Crocket ter section through holes in R-IA and cated. They should move freely. engine mounting rings is well suited for gluing R! to R-1A with Titebond. When As for mounting the engine, Mr. this. The firewall is marked for single dry, push pendulum shaft back far Brown now has a single and a twin cy­ cylinder type engine. Twin will require enough to hook both push-rod ends, linder engine available. The Alien has 90° rotation of hole position. The dis­ continued single cylinder model with 3 hole mounting would also work on this model, but the engine itself is shorter and the firewall would have to be moved aft. FLYING Flying should present no problems whatsoever, if the ship has no visible warps. The original flew “ right o ff the board” and was trimmed for optimum performance on the first day. Bank is controlled by differentially adjusting the “ V ” bends in elevon push-rods, and The extremely light wing structure is kept strong by the diagonel webbing between the upper C.G. should be as marked on plans, at and lower spars. Don't leave these out. Note wire pushrod. the 60% position o f the center section.

Linkage from aileron pushrods to pendulum crank. Aileron bellcrank is fabricated from 1/64 plywood.

JULY 1975 37 Polikarpov P02, by David Deadman, Surrey, England. Scale is 1/12, and the rubber powered model has achieved close to a minute in calm air.

FREE FLIGHT SCALE By FERNANDO RAMOS

• As a change o f pace, I’m going to Orions, Vultee V-1 ’s, Curtiss P6-E, and Lake Elsinore, which is natural since start this month’s column with a letter Vought biplanes, Wacos, Stinsons, Stag­ all (Oh? wen) the editors live there, but written by Tom O ’Brien. Tom wrote the gerwing Beech’s, and on and on! we’d like to see our meets covered a little letter to Bill Northrop, and I personally “ You must have a soft spot for the better and we know rubber scale is flown feel that you would enjoy reading it. In little gum-banders. We rubber scale nuts a lot in Pennsylvania, Ohio, and the fact, the ideas presented have led me to are devoted to Fernando’s column, Han­ Midwest, and we’d like to see what those convince the Flightmasters that they nan’s Hangar, and Walt Mooney’s pea­ guys are up to as well. Can’t speak for should hold a Thompson Trophy event nuts. Imagine that much rubber scale these areas, but as far as we’re concerned along with their regularly scheduled scale material every month, plus other con­ don’t say ‘you never send any material’ speed meet. The particulars on this event struction articles and sometimes even because we have, much of which was will be found at the close o f this column. two peanuts! ignored. Some pictures were published ‘‘Dear Bill, “ We’d like you Westerners to know in MB and AAM (Walt’s column) over " I ’m writing in praise o f the WW II that rubber scale is alive and well on the the last year or so, but no photo credit Rubber Scale Book (“ Flying Scale Mod­ East Coast. In October, the Flying Aces and no mention of the meet in the text. els,” $7.95 at your dealer, or direct from fall meet at Durham, Connecticut drew (Good point! Please send text and pho­ MB) and clamoring for more rubber scale 49 entries and 87 airplanes! Six rubber tos directly to me. Another factor that books. My favorite period is the 1920’s events, only one o f which (Embryo En­ often enters in is that many photos that and 30’s. Such a colorful era which in­ durance) was non-scale. The Glaston­ are taken do not have the quality to be cludes the National A ir Races, early air­ bury Modelers this year have held and reproduced in the magazine. An error liners, classic military and naval aircraft, will hold 3 indoor and two outdoor that modelers make when sending in and many private aircraft. meets, which will include F.A.C. events. photos, is that they sometimes use a felt "Picture 'Miss Los Angeles,’ Travel “ We see a lot in MB and other mags marker or ball point pen on the back to Air Mystery, Wedell-Williams, Lockheed about the Western contests at Sepulveda identify the picture. This ink transfers

Royal Moore and his geared rubber Gee Bee, which won the Tom O'Brien's Folkerts SK-2, from Cloudbuster plans. Span 20”, Thompson race at the F.A.C. Fall Meet in Durham, Conn., 1973. length 24". Typically gets over a minute on two loops of 3/16 Pirelli.

38 MODEL BUILDER Don Garofalow's Caudron C-460 makes a beau - How's this for realism in modeling?! Bob Bender's Howard "Ike” , Chet Bukowski's Chester tiful sight against the sky as it streaks by. "Jeep", and Don Garofalow's Caudron, in a last-one-down-is-the-winner type event. onto the next picture, making it useless tal time of two official flights (used to . . . F.R.) . .. Fernando Ramos, 19361 South Mesa be three) and the top ten get to fly in “ We have been blessed with beautiful Dr., Villa Park, Ca. 92667). the Greve and the Thompson. Only pre­ weather at the last four F.A.C. meets “ Well, this isn’t supposed to be a war racers, 24 inch span or less, with no and the Fall Glastonbury meet, so I sup­ complaint, because some stuff Dave Stott undercamber, no parasols, or high wing pose we’re about due for a disaster. The has written was published by MB. We cabins. The variety angle works here too. Spring o f ’73 F.A.C. meet w ill live for­ would like the world to know about Royal Moore has won this event with a ever in the memories o f the contestants. some o f the great events we fly, and Gee-Bee Z! He now also has a Gee Bee Deep blue skies, a few wisps of cirrus to what others are doing as well ... Not R -l. How many good flying rubber pow­ make it picturesque,light wafting breezes the winners names in lights so much, ered Gee Bee’s have you seen? The time and fabulous buoyant air. A low-winged but what kinds o f times they get, the Royal won, he nosed out Tom Nallen Jr. Mig 3 stayed up seven minutes and type o f airplanes that are flown. and his Marcoux-Bromberg by a whisker! landed only a hundred yards from where “ The premier F.A.C. event was w rit­ Tom Nallen Sr. has a Keith Rider ‘Suzy’ it was launched! ten up in Walt’s column, Handicap Rub­ that has won both Thompson and F.A.C. “ I must sound enthusiastic . . . would ber Scale, which gives bonus points to Scale. We have also had a Caudron C-460 you believe I flew R/C for a few years low-wings, racers, m ulti’s, unorthodox, and A rt Chester’s Jeep win and Dave before I "graduated” ? Well, I would do etc., to encourage variety, and it works! won the Greve with a Chambermaid. more R/C, I like it, but just don’t have Sometimes high wing cabins win, and Ever see a rubber powered Hall Spring- the time now. Rubber Scale has capti­ sometimes a Supermarine S-6B (on field Bulldog? It flies smoothly but not vated my interest. floats!) or a tandem winged Mouboussin too much duration, it belongs to Bob “ A sort of philosophy of rubber scale will win. This is a far more interesting Bender. Ed Wynn has a pretty Brown is beginning to emerge. It is fundament­ event than AMA rubber scale. B-2 ‘Miss Los Angeles,’ and Bob Thomp­ ally different from power scale (F/F, “ Then we have the Pre-War National son has a Laird Solution, which I believe R/C, or U/C) in that duration rather than Air Races and WW I Peanut Dogfight. has won once. So you can see what I realism in flight is scored. It ’s also a d if­ Instead o f a stop-watch, these events use mean by variety. Would you ever see ferent medium. Chet Bukowski and I a different concept... head to head guys bring out this sort o f stuff for an have both made the same analogy; it is elimination. Everybody launches at once, AM A rubber scale meet? I would like to like a water color painting, where the and the first one down is out, then do it see the Western modelers fly sometime others try to be more like a photograph. again and again ’till the winner is left. and would love to have them come to Bill Hannan said something very similar If you blow a motor, or damage the air­ one o f our meets. (Maybe this could be in the FSM book, pointing out that mar­ plane, you’re out. the start of a postal contest for this type ble or bronze sculptures don’t depict “ The Flying Aces run the ’Shell Speed o f model. The West against the East? the color o f tine subject, but are none- Dash’ for qualification. It is now the to­ This might be something to think about Continued on page 72

Another great scale ship by Dave Deadman of England. This one is a 1/6 scale Grain Kitten, an 18 foot span WW I airplane that was intended as a cheap way to get a Lewis gun within range of the German Zeppelins. The little twin cylinder engine couldn't "cut the mustard."

JULY 1975 39 "Put yourself in the cockpit!" Don Typond .. . being an aeronautical catch-all . . . of sorts sculptured himself for his scale-like R/C glider.

THE BEST KIND OF COPILOT useful for simulated rigging on flying wind-tunnel model which is nearly seven • Mike M idkiff contributed one o f our scale models. feet long, and evidently in good condi­ photos this month, showing his charming HUGHES BIRDS tion. We all look forward to seeing these wife Linda, who has chosen to join him Although the final fate o f the HK-I historic items on display. in his hobby: “ Linda says her interest flying boat seems uncertain at present, CACAHUETES, AGAIN in building and flying rubber scale mod­ the H-1 Racer should by now, be settled That’s French for Peanuts, Charlie! els started with her accompanying me to in its new home in the Smithsonian Insti­ In a previous column, we reported upon various contests. She was impressed at tution. Included are the spare set of the highly successful contest held in seeing the low-key contest attitude, with wings, which enabled the machine to be Fayence, France, at the instigation o f the emphasis on good clean simple fun. quickly converted to either long-distance Jacques Pouliquen. On the sixteenth of This, plus the fact we are "blessed” with or short-course configuration. The craft March, another Peanut event was con- good building weather in this area, has been kept in good order, and al­ Continuec! on page 85 caused her to spend more and more time though it w ill doubtless be completely with me at the building bench. It was restored prior to being put on public just a matter of a little coaching and view, it looks as though the addition of time, before she was hooked.” So there fuel and oil would almost make it ready ya’ go fellas, an inspiration for us all. for flight again. HANDY HINTS DEPT. For many years it was stored in an Flightmaster Warren Shipp, newly old hangar in Culver City, and hasn’t transplanted from the East Coast (New been flown since the 1940-41 era, when York) to the West Coast (Rancho Ber­ Otto Timm contemplated its purchase. nardo), near San Diego) offers the fo l­ World War Two cancelled his plans. Earl­ lowing tips: ier, during 1937, the Japanese govern­ Another source for bamboo is the ment had shown more than a passing party favor departments in some stores, interest in the machine, but their offer where they are sold as “ Fondue sticks.” to buy was not accepted. Steve Warmath, Clemson, S.C., entered this Some yardage and sewing stores offer In addition to the actual racer, the Peanut Peanut since he couldn't finish a 13" “ Elastic Tinsel Cord,” Silver, #1091, Smithsonian has reportedly received the one in time for our proxy meet. Results will be published next month.

Linda Midkiff, Erie, Pa., built this 23" span Business end of the famous Hughes Racer, snapped by Mel Duke shortly before it was shipped to Bristol Brownie rubber powered model. the Smithsonian Institution, where it will go on display.

40 MODEL BUILDER POLIKARPOV R-5. Scale views courtesy of the Czechoslovakian model magazine, Modelar. JULY 1975 41 The author launches his Peanut P-47D under the watchful gaze of Jim Hyka. another Peanut We have a trophy winner! Entered in a static enthusiast. This was at Cleveland Free Flight Society indoor meet. Photo by Russ Brown. scale contest, the "Jug" took First Place. Peanut P-47D THUNDERBOLT By DENNIS NORMAN . . . Who can resist the rugged lines of this famous World War II fighter? Even in Peanut form it doesn't appear dainty or delicate. Put the gear “ up" and fly it the way it looks best.

• Most flying scale buffs will agree that board, I built a second version with strict half section on the plan) are cut as single “ flight points” usually go to the guys attention to weight saving. Not only was units. Having done so, place 1/32 square with the high wing monoplanes. This is the structure lightened, but also the balsa braces at the top and bottom of particularly true with peanut types. Even model was decorated with tissue as much each former for added strength. Notches so it is hard to resist the sleek, glam­ as possible. A friend (who remains anon­ for longerons should be cut in each for­ orous, aircraft of World War II. The ymous for his own protection) provided mer, but stringer notches should not be “ razorback” Thunderbolt is a subject I me with one sheet o f pre-World War II cut until after the formers are in place on have built many times in many sizes. silver Japanese tissue. This proved quite the longerons. Although flight times never equal those light and gave the model a good basic There are several approaches to fuse­ high wing jobs, I have caught 16 inch color. Further weight saving was gained lage assembly, but I prefer to begin by span Thunderbolts in thermals, and be­ by the use o f colored tissue for the placing the top and bottom longerons lieve me, it is as exciting as any free- markings, etc. on the plan. These are held together flight experience. Construction is conventional, with with scrap pieces o f 1/32 square balsa With the popularity of the peanuts I emphasis on low weight. The model is at the nose and tail. Having done this, I had to try a "razorback” with a 13 inch built almost entirely o f 1/32 medium, lift them o ff and then slide the indivi­ span. My first effort was so over-decora­ straight-grained, balsa. dual formers in place and add the side ted (the model weighed 21 grams!) that FUSELAGE CONSTRUCTION longerons. flights never exceeded four or five sec­ Begin fuselage construction by cut­ Once the basic assembly is dry, make onds. ting the top, bottom, and side longerons the 1/32 square stringer notches by Returning to the proverbial drawing from 1/32 sheet. The formers (shown in gluing a 1/32 wide strip o f medium

The ship has been designed with "retractible landing gear!" You pull Framework shot discloses how the model is kept light. Long fuselage the struts out of their sockets and put 'em in your pocket! provides room for plenty of rubber, and a long motor run.

42 MODEL BUILDER

right amount of up-thrust to counter it, the model will go straight at whatever angle it is launched. Obviously, you let it go at a very steep angle. When the engine stops, the stab takes control and the model noses over into level position, and by this time it has lost all that speed from the motor run and stays in a flat level glide. “ So if you want to build a good fly­ ing, inexpensive airplane, try this one, you’ll like it." Along the same line, Dave Toduruk has written, ‘Case for .020 Power’ in the VGMC Newsletter, ‘The Hot Head.’ He says: “ Have you ever wondered how a par­ ticular power design would perform? I have. You put off building that ultimate power ship because you may have second thoughts as to moment arms, areas, trim techniques, etc. Have you thought o f all that building time and the cost of ma­ terial, and does it leave you cold? “ Well, the answer could be miniatu­ rization. Scale that monster machine down to a manageable size. I know what you may think; small airfoil sections don’t tell you what the real ship is cap­ able o f (Reynolds numbers and all that). Don 7 believe it! An FAI Power ship, scaled to .020 size (but not FAI weight), will give you scale performance without having to spend up to $100 for a hot Rossi m ill. Trimming techniques derived from your .020 size screamer will be the same as for the full size ship. Material cost and en­ gine cost is negligible. Most .020 size power ships can be built out o f your scrap balsa supply. “ Over the past 5 years, I have scaled down many power designs, ranging from Satellite to Starduster. I have been con­ stantly amazed by the consistency o f performance as exhibited by the full size counterpart. “ The SCIFS .020 old timer event is indicative of this type o f thinking. Who has the time to cut out all those parts Midi and Maxi Pearls, with their owners. Bill (It) and Alan Lovins, at Colfax Air Park, Denver, Colorado. This is the site for the 1975 SAMCHAMPS and 10th annual RMFF Champs. anyway, or find an ignition engine. And this event is very popular down south. Year Books. Take it to a printer and by Bill H unter. . . 34 inch wingspan; Also, I see where Reid Simpson has have him enlarge the plane to the size Dixielander by George F u lle r. . . 32 published an .020 rendition o f his Tor­ required. Wood sizes are then evident. inch wingspan; Trigger by Dick Mathis nado recently, so with shortages, etc. Structure may be changed to suit your . . . 34 inches; Mini-Pearl by Bill Chen- this may be the way to go. personal preference, but try to keep n a u lt. . . 24 inches (This one is a real “ Tips for scaling to .020 size: Try the weight between 3-1/2 and 5-1/2 screamer); Shocer by Mel Schm idt. . . for 150 to 180 square inches o f wing ounces, including engine and timer. 32 inch wingspan.” area. The best method is to select a “ So far, I have scaled down the fol­ Boy, the thought of a 24 inch Mini- magazine plan or a design from Zaic’s lowing designs for .020 power: Satellite Pearl with a hot Cox .020 up front really DARNED GOOD AIRFOIL - BENEDEK B-7457d2

STATION 0 1.25 2.5 5 7.5 10 15 20 30 40 50 60 70 80 90 95 100

UPPER 0.9 2.5 3.5 5.2 6.3 7.2 8.4 9.2 10.0 9.8 9.2 8.1 5.5 4.9 2.8 1.7 0.5 LOWER 0.9 0 0.1 0.3 0.6 0.9 1.5 2.1 3.2 4.2 4.9 4.9 4.3 3.1 1.9 0.9 0

JULY 1975 47 120 Upthrust \ , ρ 3 /1 6" Sq. longerons 5 /8 " "INTERN" BY NIGEL TARVIN 1/4A POWER SCALE FULL SIZE WING SECTION

oo MODEL BUILDER FLASH! UNITED STATES FREE-FLIGHT CHAMIONSHIPS RESULTS

Results, to third place, of the 34 events held at Taft, California, on Memorial Day weekend. Figure in ( ) after event is number o f entries. Full story and photos to come next month. WAKEFIELD (22) 1/2A GAS (66) 1 . Walt Ghio 900 secs 1 . Debbie Beron 31:26 2. Jim Parker 892 ” 2. Randy Secor 23:31 3. Ed Wogulis 858 " 3. Jim Kelley 19:49

COUPE D'HIVER (21) 1/2A GAS - Jr. (14) 1. Tom Medley 930 secs 1. Eric Dyer 16:21 2. P. G. Aker 734 " 2. G. Voss 15:00 3. Bob Tymchek 659 " 3. Bart Delbridge 13:14

PAYLOAD (6) A GAS (85!) 1. Scott Valentine 7:18 1. Guy Kirkwood 43:30 2. Jim Haught 7:04 2. Mel Schmidt 30:00 3. Dave Sbur Jr. 5:51 3. Jack Moreland 27:51

ROCKET (10) A GAS - Jr. (16) 1 . Jim Crocket 10:41 1. Scott Valentine 16:42 2. John Jennings 9:44 2. Robert Langenberg 13:27 3. Ron Wittman 8:56 3. Jack Moreland Jr. 13:22

RUBBER SCALE (5) B GAS (47) 1 . Hal Cover 1. Ken Bauer 25:00 2. Brick Brick ner 2. Glenn Schneider 25:00 3. Mike Mulligan 3. Al Hotard 22:05 Stephanie Perryman with her Sig Mini-Maxer, designed by Grandpa George. Ship is very sim­ GAS SCALE (8) C GAS (51) ilar to his Model of the Year. Little Daddy. 1 . Bill Stroman 1. Bob Scully 38:57 2. Bill Warner 2. Jon James 35:00 is appealing! Sounds like a fun event, 3. Hal Cover 3. Bill Hunter 33:23 but I don’t think my scrapbox is as full A OLD TIMER (16) as Dave’s. With some Hot S tuff and odds B/C - Jr. (7) 1. Bruce Norman 11:58 1. Tim Young 15:58 and ends, though, it might be possible 2. Jack Jella 11:30 2. Mark Kerzi 12:19 to whip one out in a week o f evenings 3. Bruce Hannah 8:28 3. Scott Valentine 11:16 . .. worth a try. B OLD TIMER (14) NFFS MODELS OF THE YEAR D GAS (19) 1. Bruce Norman 19:11 1 . Bill Hunter 22:40 As has become an annual feature o f 2. Greg Rasmussen 13:56 2. Scotty Harte 22:08 the National Free Flight Society’s Sym­ 3. Al Rasmussen 12:16 3. Bill Moore 18:25 posium, the Ten Models o f the Year will C OLD TIMER (16) be presented and featured in this year’s FAI POWER (21) 1 . Bob Oslan 13:23 1. Ed Carroll 18:00 publication. There were 27 active free 2. Ron Martin 12:05 2. Reid Simpson 17:13 flighters involved in the selection for the 3. Bruce Norman 11:57 3. Dave Parsons 8:94 1975 Models o f the Year and all selec­ 30 SEC. ANTIQUE (10) tions were reviewed by Ten Models NIGHT FLYING (33) 1 . Al Heilman 13:18 1. Bob DeShields 19:26 Editor, Bob Stalick; 1975 Symposium 2. Marc Tackett 13:05 2. Hulan Mathies 19:10 Editor, Hewitt Phillips; and NFFS Exec­ 3. Bruce Norman 12:08 3. Jon James 18:54 utive Director, Hardy Brodersen. Models 020 REPLICA (32) and designs will be presented at the A/2 NORDIC (40) 1. Wade Wiley 15:00 1 . Jim Parker 1500 secs Lake Charles Nationals this coming Aug­ 2. Bruce Hannah Jr. 14:20 2. Jose Ramirez 1322 " ust, and full size plans will be available 3. Jim Farmer 14:09 3. Bob Isaacson 1319 " shortly after from NFFS Supplies and O.T. RUBBER (19) Service, Publications and Plans Division. A/1 (28) 1. Jim Persson 22:00 1. Randy Secor 25:47 To whet your appetite, the following 2. Bob Oslan 19:48 2. Jim Haught 23:42 designs have won the distinction of Mod­ 3. Gene Wallock 15:03 3. Jim Farmer 21:51 el o f the Year for 1975. INDOOR H.L.G. (16) Half-A Gas: “Satellite 226,” by Bill A/1 - Jr. (16) 1 . Lee Hines :60.5 1. Bill Xenakis 12:29 and Bob Hunter. 2. Ron Whittman :59.2 2. Steve Kaiser 10:51 A, B, C, Gas: "Tartar 800," by Ray­ 3. Bob DeShields :56.6 3. Jeff Livotto 10:46 mond (Red) Johnson. INDOOR H.L.G. - Jr. (14) FAI Power: The development o f the OUTDOOR H.L.G. (34) 1. Steve Whittman :45.4 1. Dan Bragg 8:28 flapper concept as exemplified by the 2. Dan Sbur :40.9 2. Bob DeShields 8:00 Siren-Dippity by Bill Gieskieng. Worthy 3. Walt Armstrong :38.3 3. Ray Harper 7:37 o f note is that Bill has presented not only PENNY PLANE (9) a very lucid text, but many sketches OUTDOOR H.L.G. - Jr. (23) 1 . Clarence Mather 6:02 1. Eric Dyer 6:17 and drawings which should, once and 2. Earl Hoffman 6:01 2. Steve Wittman 5:33 for all, explain the current state o f the 3. Hal Cover 5:39 3. Marvin Miller 4:34 art in explicit detail. This excellent pre­ sentation is, in itself, worth the price o f PEANUT SCALE (12) UNLIMITED RUBBER (18) 1 . C. Mather, Cougar 3 1. Bob Tymcheck 1680 secs the Symposium Report. 2. Fudo Takagi, Volksplane 8 2. Del Adam 902 " Wakefield: "M onarch,"by John Gard. 3. Mike Mulligan, J-3 8 3. Jim Quinn 900 " Coupe d ’Hiver: "Garricoupe,” by Roger and Jean Louis Garrigou. E-Z B (5) UNLIMITED RUBBER - Jr. (7) 1. Clarence Mather 6:41 1. Tim Young 647 secs Indoor Duration: “The Monster," by 2. Fudo Takagi 6:31 2. Eric Dyer 620 " Erv Rodemsky. 3. Earl Hoffman 6:28 3. Robert Langenberg 489 "

JULY 1975 49 Hand Launch Glider: "D riftw ould,” by Steve Geraghty. Unlimited Rubber: ‘‘Little Daddy,” by George Perryman. Rocket: “ Canned Heat," by Don Chancey. Special Award: The Seelig Multi- Function Timer by Hans Seelig. HINTS AND TIPS Computing pitch o f rubber model propellers: I have always known that there must be some way of computing the pitch o f the propeller before you cut the darned thing out, but since I am not one o f those mathematics/engineer- types, I could never figure it out for myself. In fact, I’ve been accused of thinking that the square o f the hypo­ tenuse was the name o f a park in the center of Haight-Ashbury. However, dur­ ing some reading I was doing lately in a book entitled, “ Beginning to F ly," pub­ lished in 1928,1 ran across the following: “ For model work, the pitch o f a Dave Whatsistrum flits from one publisher's office to another. Here he is with Britain's best propeller may be determined from the proxy flier and part-time managing editor, Ron Moulton. block from which it is carved by use of sistency o f water. Flows it on with a heavier cloth on his fuselages and says the formula: pitch =TTD/W x T, Where brush right through the covering laid that a slightly thicker solution is needed TT= 3 .1416, D = diameter o f propeller over the surface to be covered. Puts on with the heavier cloth (60 to 65% epoxy or length of block, W = width of block, one coat and then sprays over the cured to 35 to 40% thinning agent) in order and T = thickness o f block. covering with clear K&B epoxy paint to to get a good bond. "Example: Given a block 11/16 by fill the pores. It’s a worthwhile experiment. 1-1/4 by 10 inches find the pitch o f a Not having the imported epoxy to ROUND TUIT ONE MORE TIME propeller carved from this block. work with, I guessed that Hobbypoxy Way back in 1974, I featured an arti­ D = 10 inches, W = 1-1/4 or 1.250 Glue Formula II (in the big plastic bot­ cle about “The King Who Wouldn’t inches, T = 11/16 or .687 inches, and tles) couldn't be too much different, so Build Models.” In this humorous (?) P = 10 X 3.1416/ 1.250 x .687 = 17.243 I tried it. Mixed mine with acrylic lac­ feature, the ending provided a slogan for . . . Then the pitch equals 17.243 or for quer thinner (or regular dope thinner) use on your old Dewey (Tom, not Don. practical purposes it could be called in a 50/50 solution until it was the wen) button. The slogan had to do with 17.25.” consistency o f water. Applied it through “ Getting Around TU IT .” Since then, it There, it seems as simple as apple pie. the fine K&B cloth right onto the sur­ has been brought to my attention that Now, with the use o f a simple calculator, face to be covered. Twelve hours later, some commercial organization is manu­ even I can figure it out. it was cured, light and strong. Just like facturing TUIT buttons, keychains and Fiberglass Cloth and Epoxy Covering: that. what have you in plastic, metal and I have always marvelled at the neat and I haven’t experimented with meth­ sterling silver. Just think, you read about light covering jobs that Charlie Martin anol y e t. . . since all o f mine has 20% such a revolutionary development right has achieved on his FAI Power Models. castor oil mixed with it ... but see no here in the pages o f MODEL BUILDER Never could get mine to come out the reason why that can't work. Epoxy has ... and you knew about it first. same way. So, I talked to him and found the virtue o f being stronger and, I think, HUMOR SECTION that he uses some kind of imported easier to work, than polyester. I use the Throughout the ages of history, peo­ epoxy and mixes it with methanol until very fine and lightweight cloth from ple have derived scientific principles and it is a 50/50 solution that has the con­ K&B for all applications. Charlie uses a Continued on page 58

Lee Hunt took 1st and high time in Class D at the SHOC annual. Ted Rogers, who gave F/F editor a plastic, key chain T U IT button. Ship is Condor "800". K8iB .41 power and Monokote. Miller photo. and his patriotic 1/2A Mini Pearl. Do you fly it or salute it?

50 MODEL BUILDER Carl, the better flyer in the Linstrum family, holds the fully wound Ultra Dart over his head for our inspection. By the looks of it, the prop should run long enough for a max even if the U.D. has a vertical glide!

Ultra Dart By DAVE LINSTRUM When Frank Ehling designed the Delta Dart some years ago, he undoubtedly never envisioned that it would grow into such a monster. Wonder if Dave and Erv Rodemsky drank from the same cup?

• The race is over, AMA Racer (you remember the Racer. . . the original Delta Dart by Frank Ehling), and you can go back to Mama Bear, AMA Cub. Even the Thermal Dart is in a big down- draft, now that the Ultra-Dart is here. Super is not the word for it, even though it is able to leap tall buildings (the nem- isis of the small field flyer) in a single flight, and spectators have been heard to shout “ Look, up in the sky . . . it ’s a bird, it ’s a plane, it ’s the Ultra-Dart!” Very simply stated, this ship is the largest Delta Dart anyone would ever care to build (Bet you started something with that comment! wen). The flying surfaces are proportioned similarly to the original AMA Racer and the Thermal Dart, but the motor stick has been elon­ gated tremendously to accomodate a long motor. This gives very long prop Inverted 'U ' shaped wing saddle slides along stick fuselage for easy adjustment. Light weight aluminized mylar covering is available from NFFS Supply (see plans).

JULY 1975 51 FULL SIZE PLANS AVAILABLE - SEE PAGE 88 52 MODEL BUILDER runs, making the model a competitive for the loss or damage o f one in the con­ Unlimited rubber design for the neo­ test. We chose silvery mylar covering phyte Junior flyer. However, due to its because it is humidity-proof (Louisiana light weight, it is not suitable for windy was expected to be wet) and easily ap­ weather flying. The idea was not to plied with aerosol rubber cement. No make a plane for all seasons, but a special watershrink or doping processing makes model good for early morning contest quick completion possible. This is a flying before the wind is up, or for technique picked up building Penny- gentle evening sport flying. It is not fit­ planes and covering them with Microlite ted with a dethermaliser, since it is con­ polycarbonate plastic film . Normal mod­ sidered so simple to build that it is ex­ eling tissue, such as Marlow, or one of pendable. Also, early morning ground the plastics such as Monokote or Crystal risers and weak thermals are seldom Cover could also be used, but they strong enough to carry the model far should not be shrunk in any way. No (Famous last words!). finish is used on the model (for lightness The prototypes were constructed by and anti-warp reasons), but the fins of my son, Carl, as his entries in the Un­ the prototypes were given a quick spurt limited event at the 1974 Lake Charles from a Pactra Dayglo can to aid in re­ Nationals. He simply did not have time covery . . . the glowing fin is easy to spot to attempt anything more time-consum­ in tall grass or Louisiana underbrush. ing to build. Making two models at once If the idea o f building the largest was a fast-track technique and allowed Delta Dart (at least until Erv Rodemsky

The "motor can" makes a come-back! It's a small wire loop which prevents excessive rub­ ber motor sag. builds a Class D Indoor version to fly in Cardington Airship Shed) within sight turns you on, then send off to MODEL BUILDER for a set o f full size plans and gather a few strips o f Ecuador Gold (balsa in today’s economy) needed to fabricate the airframe. A Williams Bro­ thers nylon prop bearing and Peck Poly­ mers 9-1/2 red plastic prop are also re­ quired, although you could adapt a North Pacific bearing and a KeilKraft plastic or Paulownia wood (from Old Timer Models) for propulsion. A carved balsa prop can also be used (fit with free wheeler), but this defeats the pur­ pose o f having a quick-bilt, expendable model. Read these building instructions and study plans thoroughly before com­ mencing construction. FLYING SURFACES We always start here, so glue joints can dry while the motor stick is being built. However, if you choose to use one o f the cyanoacrylate adhesives, waiting time is nil. We feel these are too dan­ gerous for a youngster to handle, so Carl used Tite-Bond on the joints. Tape the plans down to your building board after sweeping away the debris from the last model you built (how many modelers have cluttered workbenches like that in Northrop’s editorial column?) and then stretch a sheet o f Saran Wrap or dry- cleaner bag over them to prevent glue adhesion. Wing: Cut the LE and TE to length from medium weight 1/8 squares, bevel­ ing the joint at center for later dihedral glue joining. Then cut and fit all the 1 /1 6 x 1 /8 ribs, gluing in place after pre­ gluing the end grain. This is a trick to make stronger jo in ts . . . just apply glue to ends o f ribs, wipe o ff excess and then apply more glue before inserting in place. Deep penetration of glue into balsa w ith­ out depleting glue at joint is the result. As Carl Linstrum launches the Ultra Dart, you can see that the Mylar covering has assumed an Stab: Cut the LE, TE and spar from airfoil shape. It's an "M N " section . . . Mother Nature, that isl Continued on page 62

JULY 1975 53 Sportsman Class winners at San Jose Winternationals (I to r): Jim Amateur class winners at the Winternats (I to r): Don Newberger 3rd, Wells 3rd, Steve Betts 2nd, and Jim Cade 1st. Ed Kramar 2nd, and Troy Adams 1st. R/C AUTO NEWS By CHUCK HALLUM

• For those of you still looking for the JoMac/MRP. Several other booths had expects to start marketing its car in a few tabulated results o f the 1975 ROAR small electric R/Ccars (about 1/16 scale) months. In Japan they say they are sel­ Winternationals, they are presented this and off-road Buggies. During the R/C ling about 1000 of these per month. month. There wasn’t enough room to car demonstrations, the spectators Both Buggies had pneumatic type get them in, along with the pictures, in crowded around the track to watch the tires all around, and front suspension. the May Winternationals article. 1/8 and 1/12 scale cars. A t the end of The Futaba had rear suspension also, Last weekend I attended the MAC the car demonstrations, the crowd while the Kyosho was amphibious. Hobby and Craft show at the Anaheim thinned noticeably, returning to the The suspension system o f the Futaba Convention Center. I thought the public show inside. was very interesting. The front suspen­ turn-out was better this year than in Of greatest interest to me were the sion had upper and lower arms with ball previous years. But more important was o ff road dune buggies, in about 1/8 joints, rubber bushings, and torsion bar that the interest in the R/C cars was scale, by Futaba and Kyosho. This type suspension. Front motion was about a higher than ever. of car can bring variety to R/C cars that 1/2 inch, plus tire deflection. In the The R/C cars were featured in three has been lacking. The Kyosho is current­ rear, the engine was axial, with power booths; ROAR, Jeri Products, and ly being nationally advertised and Futaba drive going back to a gear box. The out­ put faced forward under the input, and went to a solid rear axle with pinion gear through a U-joint. The axial output allows rear axle roll, and the U-joint al­ lows some up and down motion. Vertical axle motion is relatively limited, about 1/8 inch, but roll stiffness appears rea­ sonable, and the pneumatic tires increase relative rear springing. Besides all this the machine looks great. The hand test guess on weight is about 9 lb., which is probably pretty good for this type veh­ icle and the terrain it is to be driven over. The Kyosho front suspension has up­ per and lower leaf springs with a travel o f about 3/8 inch. The rear axle is solid, but the pneumatic tires make everything feel pretty soft. A round drive belt on a couple o f pulleys operates the propeller for propulsion in the water. The front suspension is external, and the rear axle goes through packings to seal the tub. This one looks pretty sharp too. The Kyosho seems to weigh a little less than the Futaba. A recoil starter is enclosed, Novice winners at the Winternationals (I to r): Jim Belfiore 2nd, Phil Santacruz 1st, and Jon since it is difficult to get to the flywheel. Quaid 3rd. All I can say is I’ll bet it would be a

54 MODEL BUILDER ball to drive one of these cars. Here in the U.S., we’ve been concentrating only ROAD RACE FINALS on the flat-track competition cars. It’s great to see that other countries are mak­ Place Driver Car Radio ing progress in other R/C car categories. NOVICE Also hear that Ronnie Ton, a Dutch 1 Phil Santacruz Delta Futaba fellow, is running a full suspension car Jim Belfiore in Europe. Won both heats at the last 2 RARE Futaba race in Germany. Don’t know whether 3 Jon Quaid MRP Delta the tracks in Europe are rougher than 4 Chuck Glidewell Delta Orbit ours, but it seems that most people over 5 Dave Laubauch Thorp Futaba there are pretty interested in suspension. 6 Bill Bryant Assoc. Kraft I think it’s probably a little more than AMATEUR just an interest in details and complexity. Hope I get a chance to run over there 1 Troy Adams Thorp Kraft some time. I plan to have an article on 2 Ed Kramar Taurus Delta suspension systems__ what they will 3 Don Newberger HRE Orbit do, why they are used, and how they 4 Jay Bunten Thorp Apollo should be set up, in the near future. 5 Willie Bennett Thorp Orbit Meanwhile, here in the U.S., all the 6 Ron Bernardino Delta Futaba talk is about means of getting more SPORTSMAN horsepower out of engines. Lap times do seem to be improving all the time, so 1 Jim Cade Cade RS the efforts are not wasted. But I feel 2 Steve Betts Scorpion Kraft this approach is a dead end kind of a 3 Jim Wells Delta Delta thing, because the current U.S. chassis 4 Bill Steele Cade MRC approach really hasn’t changed in the 5 Jack Ulstad Jr. Thorp Kraft last 4 or 5 years. The horsepower race 6 Al Olseen Scorpion Futaba eventually will end up requiring chassis changes to be able to effectively use the EXPERT delivered power. The things that are 1 Chuck Hallum HRE Deans being done to the old work horse Veco 2 Bill Jianas Cade MRC engine include; the McCoy conversion, 3 Matt Azzara Assoc. MRC larger carburetors (up to .60 size units Earl Campbell now) and trick Schnuerle porting around 4 Assoc. Deans the liner. Most o f these changes have 5 Bob Don kels HRE Deans been giving more top end to the engines 6 Gary Kyes Delta Delta so that the bottom end torque can still be handled by the current chassis ap­ DRAG RACE FINALS proach. Event Place Driver Car A couple o f new 1/8 scale formula bodies are o u t. . . the 313 B3 Ferrari by RAIL 1 Ron Sheldon MRP Associated and the Foyt Coyote by 2 John Rouse MRP Parma. Both new bodies look very good. FUNNY 1 Al Chuck Assoc. The Ferrari looks like it will have a little 2 Gary Buriani Thorp better front aerodynamic downforce and the Coyote has a very low side pan pro­ STOCK 1 Steve Betts Scorpion file like the real car. Parma will have the 2 Gary Kyes RARE UOP Shadow Can-Am car out shortly, with some more new sportscars on the Event Low ET Top Time way. I ’ll give you a rundown on them as RAIL Ron Sheldon Ron Sheldon soon as I ’ve seen them. FUNNY Mike Carone Gary Buriani Haven’t heard any news yet on the events to be run at the 1975 ROAR STOCK Steve Betts Gary Kyes Nationals. Still hoping it will be Stock cars on the oval or a semi-oval track. Out here in Southern California, we haven’t run an event like this, bul I think it would be great... lots of fun and a challenge. Besides, a little bump­ ing wouldn’t have the disasterous effects on the open wheel cars! The racing would be more competitive and more enjoyable for the spectators (me too!). Next month, I ’ll have the results of the Indy 500 Festival 1/8 R/C Oval race, held May 2, 3 and 4, as well as the Oakland (California) Spinouts 1/12 scale race held May 10and 11, 1975. The 1/12 scale race had a great turnout for the $1500 worth of trophies and merchan­ dise. Also heard that there was a lot of Drag winners (I to r): Funny Cars; Buriani 2nd, Chuck 1st, Stock Cars; Betts 1st, Kyes 2nd, and great racing. · in front. Rail Cars; Sheldon 1st, and Rouse 2nd.

JULY 1975 55 combat. If your dealer doesn’t have the KUSIK new series props, pester him to order KUSTOM them, or do it yourself, direct (see ad). HP 61 AFM ENGINES MORE FIBERGLASS A new manufacturer, Kelly Products, THROTTLE is making available fiberglass/epoxy SUPERTIGRE G15RV props in many sizes. I have received DIESELS several examples and they are well made, SPECIALLY PREPARED molded with a distinctive green color. FOR F.A.I. TEAM RACE Sizes are available for Scale Racing, FAI Combat, Fast Combat, Slow Rat and 7WO CUSTOM VERSIONS FAI Team Race. Do not confuse Kelly AVAILABLE. SEND S.A.S.E. with K&W props. You will find the Kelly FOR INFORMATION TO: Products ad listed in MODEL BUILDER. JED KUSIK ZAP-YOU’RE IT! 2738 E. EVERETT PL., More Cyano what’s its face glue. ORANGE, CALIF. 92667 Many people are starting to package this PHONE: (714) 538-3694 new adhesive and the price is starting to come down. Hurray for market compe­ tition. “ Zap” is as good as any brand FIBREGLASS EPOXY PROPS and comes with a packet o f micro bal­ All types of racing props Sport Goodyear Rat loons for filling spaces in joints. It’s a $24.95 FAI&BTeamRacing Free Flight QuarterMidget few cents cheaper than the competition, 7x3.5 S 3.50 plus the filler makes this a good deal. 7x6 Thin Hub SOLID! • Increases performance for all HP61F 7x6 Thick Hub 3.50 engines 7x6 Thin Hub QM In the April issue o f Stunt News, the • Field tested for three years including 7x6 Thick Hub QM 4.50 Pampa newsletter, a comment was made 2nd place at 71 and 73 R/C Internats 7x7.4 Russian Type about experimenting with solid wires • New design omits spray bar provid­ 7x7.6 Russian Type 3.50 for stunt flying. I have been using solids ing maximum venturi efficiency 7x9 Speed for several years and appreciate the ad­ • Super free throttle barrel movement 3.75 7x9.5 Speed vantages. There is less drag in the same 8x8 4.50 size solid wire as stranded, but then you AVAILABLE AT YOUR FAVORITE DEALER 8x8.5 QM finished All others as moulded unturned don’t have to use the same size. The rule [A S NEISON MODEL PRODUCTS We make props ic special order Write for quote SASE book allows the use o f solid wire sizes A \ 6929 WEST S9TH STREET Illinois Residents add 5 % Sales Taa .003 to .004 less than stranded. This CHICAGO. ILLINOIS 60633 · (312) 536- 7101 A Kelly Products Inc. PO Box 38 gives far less drag and weight, and im­ Western Springs.Illinois 60558 proves model performance. In a one-only event like stunt there Peanut...... Continued from page 43 bond paper, which is sprayed black prior shouldn’t be any worry about tangles entirely too heavy. The second version to installation. The cockpit canopy is or kinks. Solid wire being smooth, pro­ used silver tissue. This, of course, is al­ vacu-formed. The canopy frames are cut vides easier control when twisted after most impossible to find, but finishing from tissue strips and adhered with clear consecutive maneuvers. Special main­ the model in all white or with a very dope after the canopy is joined to the tenance is required o f solid lines, how­ lightly sprayed coat o f silver Floquil model, using contact cement. The cool­ ever. After 8 or 10 flights, solids accu­ should give a light, but pleasing result. ing flaps are cut from bond paper, spray mulate oil and dirt from your own ex­ A number o f articles and pamphlets painted, and attached. All panel lines haust and become sticky, thus negating have been prepared on the Thunderbolt, and control surface separations are made their original smoothness. but I found the "Aircram Aviation with thin strips o f black tissue. To properly clean the solid wire, first Scries” Booklet No. 2, "Profile Publica­ FLYING wipe with a rag (normal for stranded tion” No. 7, and “ Camouflage and For indoor flying, use one loop of wire). Second, polish with fine steel Markings” No. 15, contain a wealth of 1/16 Pirelli, 15 inches long. For outdoor wool or Scotchbrite pads. I prefer the color scheme ideas. flights, two loops are probably best (I Scotchbrite as it does not wear out as I am particularly attracted to inva­ fudge a bit here because the model fast as steel wool. A helper is needed to sion stripes as a way o f “ dressing up” shown has not yet been flown outdoors). hold one end o f the lines tight while you the model. The black stripes are easily Make the normal flight adjustments with polish the lines. Finally, wipe the lines done with tissue, but the white is a prob­ elevator, rudder, and thrust line, then with a clean rag that has been dusted lem. I use white tissue strips which are find those guys with the Piper Cubs and liberally with talcum powder. Those lightly coated with Polly-S latex paint give them a run for their money! · wires will shine and be as slick as a to highlight them. The insignias are baby’s a .. . uh, arm. traced onto dark blue tissue and then C /L ...... Continued from page 34 ENGINE TIMING FOR .40's doped to the model. The “ stars and bars” Phil Shew, o f Albuquerque, N.M., are then painted with Polly-S. The an­ mer than before, and several new sizes (the proud owner o f a new Jed Kusik tenna is cut from 1/64 plastic card, and styles are offered to meet new com­ custom Super Tiger .15 for FAI team painted and positioned after the model petition requirements. racing) has worked out a table for com­ is covered. For stunt, the new 11/6 EW (extra paring the timing o f various .40’s suit­ I believe that a flying scale model wide) for the longer .45 and .46 powered able for Slow Rat racing. Good work should have a pilot and this model is no models . . . speed, a complete new 400B Phil. Now how about comparing the exception. Here the pilot is carved from series. . . for 1/2A, A, B, C free flight, case volumes? That would be helpful in styrofoam (it can not only be carved, a new Pro Series 2B . . . for scale racing, working with fuel economy in Slow Rat. but also molded with the head o f a pin) the new quarter midget R/C props give The following table shows engine purchased from Micro X Products, P.O. extra rpm in 7/5, 7/6 and the 7/6 N timing for various 40’s that are suitable Box 1063, Lorain, Ohio 44055. (narrow). for Slow Rat. The cockpit floor is filled in with The 7/6 N is also well suited for FAI CALIFORNIA COMBAT HANG-UPS

56 MODEL BUILDER The Winners’ Choice... PRO LINE ’

COMPETITION SERIES! CHALLENGER II! 3-CHANNEU Yesterday, today and Pro Line’s new no-compromise A new plateau of performance tomorrow—still the world’s standard of quality for the and reliability never before standard of design excellence serious sport flyer. available in any 3-channel and reliability. system. New for ’75! New for ’75! New for ’75! • High precision thumb wheel • Newly-designed semi-open • Available in semi-open or trim controls—up to 240° gimbals! high precision open gimbal travel for razor-sharp • Completely redesigned versions! adjustments! receiver with integral con­ • Fully compatible with • Optional transmitter poten­ nector plugs—simplifies Competition and tiometer conductive plastic servo wiring! Challenger Systems! control pots with 1% • A low-low 7 M.A. receiver • Receiver utilizes integral linearity! drain with CMOS integrated connector plugs and CMOS • Dual rate aileron sensitivity circuitry! circuitry for simple installa­ switch and slow roll button tion and long airborne are now standard! battery life!

• Trainingsystem standard in all models! · Completely redesigned servo mechanics hand-crafted by Roy Klett! · New charger standard in all systems! (Light emitting diodes charge indicators.) · A lull line of newly-designed battery packs from 225-750 M.A.!

10632 N 21st AVE. · SUITE 10 • PHOENIX. AZ 85029 Loro© [10©©ftF@m0©: TELEPHONE (602) 944-4626 MODEL BUILDER Free Flight derives great pleasure in presenting for your understanding, some o f those little known but very important scientific principles which are related to certain FREE FLIGHTER5! peculiar laws o f inexactitude, perversity and whimsey in pursuit of the more com­ plete understanding o f our modeling universe. Let’s start out with one which U-CORTROLLERS! is familiar to all o f us: K&B BRINGS IT ALL TOGETHER A 1. Murphy’s Law: If anything can possibly go wrong . .. it will. L Protection, Beauty, and Strength 2. Cahn’s Axiom: When all else fails with K&B DOPE... a new integral ... read the instructions. part of K&B’s “MATCHED 3. Horner’s Five Thumb Postulate: FINISH SYSTEM” Experience varies directly with the amount of equipment ruined. 4. The Spare Parts Principle: The accessibility, during recovery, o f small parts which fall from the workbench, varies directly with the size o f the part . . . and inversely with its importance to the completion of the work under­ way. 5. Gumperson’s Law: The probability o f a given event occurring is inversely proportional to its desirability. 6. Chisholm’s Law of Human Inter­ action: Any time that things appear to DOPE — (Butyrate) DOPE-(Nitrate) be getting better, it follows that some­ HOT FUEL PROOF “Matched Finisn NON FUEL PROOF thing has been overlooked. System” . 7. Theory of International Society o f Philosophic Engineering: In any cal­ culation, any error which can creep in The finish coat specifically The perfect base coat for . . . w ill. formulated to apply over tissue and silk. Formulated 8. Rule o f Accuracy: When working colored tissue or colored for use with SUPER POXY toward the solution of a problem, it silk where paint is not to be CLEAR or one or more of always helps if you know the answer. used. Protects, Beautifies the 33 colors of SUPER 9. Advanced’s Corollary: Provided, and Strengthens as the POXY PAINTS which pro­ o f course, that you even know there is a cover “ firms” up. Easily vide a fuel-proof, glossy problem. (The problem assumed in brushed on. Fast drying. finish that knows no equal. “ Rule o f Accuracy.” ) THINNER-(Butyrate) THINNER-(Nitrate) Being of sound mind and body (which For use with Butyrate Dope. For use with Nitrate Dope. is probably debatable, I have utilized two o f the above principles and have arrived at the following conclusion: DOPE & THINNER: Both available in 4 Oz. Bottles, 16 Oz. & 32 Oz. Cans 1. I understand Advanced’s Corollary AVAILABLE AT YOUR FAVORITE LOCAL HOBBY SHOP. and deduce that the problem is that I Send for your K&B Catalog, “ Matched Finish System" Handbook and Super Poxy Paint Chart. Include 25< to cover postage and handling. Address to Dept. SFt-3. have rambled enough for this m onth’s column, and aurora hobbycrafts 2. I have applied to Rule o f Accuracy and have discovered the answer to the DIVISION OF AURORA PRODUCTS CORP. 12152 WOODRUFF AVE DOWNEY. CALIFORNIA 90241 above problem. Consequently, herewith and forthw ith, I shall stop until next month. · Just received the new Mustang Stun- IN BRIEF Little Bomb .. .Continued from page 9 Foam wings are “ in ” right now. They ter from Sig. It has a foam wing (“ in” are not new or particularly fancy, but it again!) and molded plastic parts. This sides, rub glue (I like 5 min. Epoxy) is just the current rage to use foam. You kit is really nice. I should have it put into the inside surfaces from the engine don’t have to fly, just show up with a together by next month and can tell compartment to aft of the firewall, and “ foamer” to be socially acceptable. you more about it. I plan to use the Les from just ahead o f the last former back HIGH POINT MAN OR WOMAN McDonald method of finishing as de­ to the aft end at the rudder post. The OF THE YEAR tailed in Stunt News, so that should take engine mount should be secured BE­ Want to add a real fiasco to your an additional month after construction. FORE planking the nose, and pushrod local combat flying (worthless but in­ I don’t know if I can wait that long, clearance and alignment checked before teresting)? Institute a points program for this kit looks so good! · planking the top. Don’t neglect the rating the top flyers and keep records doublers, as they are all of importance. and make a fuss about it like we are F/F ...... Continued from page 50 You should have no trouble picking these doing in So. Cal. You might see some formulated natural laws which govern out on the plan. individuals get so hung up that semi­ the lives of man and their endeavors. The empennage, that is, vertical fin private contests are held to gain per­ Some are directly applicable to modelers and rudder, stabilizer and elevator, are sonal points (ridiculous!). and their pursuit o f the elusive model-of- cut from medium soft 1/8 or medium NEW STUNT KIT FROM SIG models and max-of-maxes. Herewith, 3/32 sheet balsa, with surfaces sanded

58 MODEL BUILDER pulse commander A QUALITY PULSE PROPORTIONAL RUDDER-ONLY SYSTEM FOR THE NOVICE AND SPORT FLIER.

-New LED charge indicator lamp! -Improved circuitry for even greater dependability! -New transmitter antenna mount system for a more attractive package!

Due to its small size, lightweight, simplicity, and low cost the Pulse Commander offers an ideal system for someone on a budget wanting to get into R/C flying or needing a second system for fun flying. Flight pack weights start at 2.5 oz. for the Baby System which is small enough to go into ■ .010 powered planes. . . V. Units are completely wired and tested with airborne nicads and charger.

10G 15-Baby System, S69.95 10G15T—Baby Twin System, $72.95 10G 16-Standard System, $71.95 10G17-Stomper System, $74.95

BABY TWIN SHOWN dicl& dream

AN AIRPLANE FOR THE BEGINNER AND SPORT FLIER. DESIGNED FOR THE BABY OR BABY TWIN SYSTEM.

SPAN: 32 in. WEIGHT: 12-14oz. AREA: 175 sq. in. POWER: Pee Wee or 13L100 DICK'S DREAM KIT $8.95 LENGTH: 25 in. Tee Dee .020

BOX 511. 116 W. 19th ST., HIGGINSVILLE, MO.. 64037 NAM E______USE THE COUPON TO GET OUR COMPLETE ADDRESS______CATALOG. $1.00 CITY ______STATE______ZIP ____ ADD $ .50 FOR 1ST CLASS MAIL RETURN. BankAmericard/Mastercharge Number______

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i A D D 5 1.00 for handling on MB1 all orelers except catalog. A C t W it

ULY 1975 59 VL-101 ELECTRIC FLIGHT SYSTEM F e a t u r in g HYTORK 48 MOTOR WIN & PLANETARY GEAR UNIT xcQ,\e\e c° Flying weight 2 Vi o z . will power 25 to 50" . / wingspan weighting up to 10 oz. W VL-101 Electric Flight System $19.50 FC-66 Field Charger $29.50 Instruction Book Only $ 1.00 Catalog 25c! Add 10% for Postage & Handling PRODUCTS Send Check or M.O., NO COD's DIVISION OF VISTA LABS Calif, add 6% Sales Tax $100 '// 7023-D Canoga Ave. W/Λ Canoga Park, Ca. 91303 See Your MODEL DEALER or ORDER DIRECT Hobby Dealers send for Information

to the typical cross-section shown. Note has the ACE 1-8 Rcvr., ACE BANTAM that the leading edges of rudder and SERVOS, and ACE 450 ma Battery elevator are half-round, trailing edges pack. Ready to go, dry, she weighs 16 /NS 1/32 inch thick. If trailing edges are left ounces. With other heavier radios, she thicker, you will really slow the thing still need not weigh more than 18-20 down, while if thinner, they will want ounces. to warp or curl. Enter the Hobbypoxy When hooking up controls, in most “WIN­ The wing is of typical built-up con­ contest and cases the IN SID E of theservo arm should NERS CIRCLE” struction, pretty much the same as we be used, and the outside hole of the be one of five modelers who used forty years ago. A shim o f 3/32 by horn. Things can be speeded up later, will each receive a $100 mer­ 3/16 is used under the lower spar. A but it’s doubtful that many will want to chandise certificate redeemable 1/20 shim is used under the tail-end o f do this. with World Engines, Royal the three center ribs ONLY, and the Control surface deflection should be Products, or Midwest Model other ribs and trailing edge are hard about 1/8 inch up and 1/8 inch down, Supply Co. Winning models , against the building board. With the ex­ and certainly not over 3/16. The rudder will also be displayed — with ception o f sheeting the underside of the may be ever so slightly more than the the builder's permission — at leading edge, the entire wing is built on elevator, if desired. Trim the model to be the board. the Toledo and/or MACS slightly nose heavy, that is, just a bit of When sheeting the underside, it is Hobby Shows. (If this is not down elevator. With most of us it is far especially important that great care is easier to hold a bit of up rather than a practical, a large color photo­ taken to avoid warping. It is a good idea bit o f down, and final trim comes graph of the model will be to wash out, or warp the tips EVER SO AFTER we begin flying, so make the displayed.) SLIGHTLY so they have just a bit less start as easy as possible. DON’T START All you have to do is send in a angle o f attack than the center section, TAIL HEAVY! color slide of any type of model but only two or so degrees. This will For the first flight, you can put the — RC. CL, FF. airplane, boat, make the ship settle down and “ hang prop on backwards, run her rich, or use in the groove,” but if excessive will really a 6-3 prop and a slightly rich setting. car. or whatever — that has slow her down. Any and all o f these w ill tame things been finished with Hobbypoxy Another important point is dihedral. down a bit. Make the takeoff straight, enamels, and write a 50 word Now if a little bit is good, more is not. very shallow climb, and NO TURNS (or less) description of the use Fact is, more is bad and will cause Dutch until a safe altitude is reached. After of Hobbypoxy products on the Roll and an airplane that is lousy on the getting good height, trim to extent re­ model. turns. DON’T INCREASE THE DIHE­ quired, then feel her out with minor Entries will be judged by Pettit DRAL. maneuvers, progressing to more severe ones so that you get the feel o f the ship. Paint Company officials and Radio installation will vary with the equipment. Many radios are suitable, but When the engine quits, keep the nose the following magazine editors: then many are not. Servos must be small down SLIGHTLY, at all times, and es­ Don Dewey. RCM (KPS-15) but need not be the smallest. pecially in the turns. Round out smooth­ Bill Northrop, MB Small receivers are required, but again, ly on the approach, bringing the nose up Walt Schroder. MAN many standard receivers fit this des­ more as you near touch down. The ship Bill Winter. MA cription. I am certain all of the "Bricks” glides well, but fast, so be prepared to will be suitable, but battery packs are a overshoot. AVOID OBSTRUCTIONS at SEND FOR problem. I just don’t like 225 ma packs, both ends of the field. as flying time is marginal for racing. The If you are a novice, I suggest you get OFFICIAL ENTRY BLANK! new 450 ma. packs are great and exactly a Formula One or a Quarter Midget flyer what is needed. Lightweight, they are to test hop and trim her for you. If you flat and narrow and easy to install. They are a RANK novice, I suggest you hang have enough flying time to suit all racing her up until you have more skill. After conditions, and most fun flying days, es­ all, the fun is in the building and the pecially when using only two small ser­ flying, not the breaking and repairing. vos. After about three “ nose jobs” I lose Early ships used the smallest radio interest in a ship, and would rather start commercially available, but this proved over, and I detest wing repairs. Play it to be trouble prone. The model shown cool and have good fun flying . . . ·

60 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER Choppers...... Continued from page 17 tor the call was to pass on a few goodies which he thought should be incorpora­ ted into the machine. As this story develops, I’ll pass on his words o f wis­ CANNON IS dom. Actually, the Lark is a tinkerer’s SMALLER! dream ... it is perfectly suited for min­ S M A LLE R LIGHTER or personal modifications, which every n IN SIZE! ilN WEIGHT! builder wants to add on to his dream machine. For example, John said the 1 J" tail boom was too flimsy and bounced c up and down while in flight. The neat solution is to add a short brace from the Jl floorboard to the boom, 'ala shark. This (/) brace can be aluminum tubing or rod . . . ® <3 IES just strong enough to eliminate the j bounce. Flight characteristics are vastly improved with this mod. I The finished chopper flew right off I r the drawing board, so to speak! Only a minor tail rotor adjustment was neces­ sary to keep it in straight flight from the start. After about 30 minutes of ups and \ downs, we discovered the tail rotor gear assembly was getting very sloppy and probably would have become useless Introducing a within another hour or two because the rotating gear shafts were running in plas­ SMALLER, LIGHTER RECEIVER tic housings! The next modification took ...The NEW TINI-MITE about one hour, during which time we Eight Channel Capability disassembled the rear gear frame, drilled Volume 1 61 cu in Weight 1 oz Drain 8 ma A oversize holes in the plastic, and slipped NEW STICKS Open Gimbal for precise centering control THREE SYSTEMS FROM WHICH TO CHOOSE. DROP' in brass tubing bushings. Standard hobby 1. TINI BLOCK includes Receiver, and one Servo in the block IN SIZE shop brass tubing fits the shafts perfectly 2. T IN I-T W IN includes Rx and two Integral Servos and is held in place with “ Hot S tuff” or 3. TINI-MITE includes New T IN I-M IT E Receiver, THE N EW “ Zap.” Lubricate occasionally with a individual Servos All three systems available in 2. 3 or 4 channels drop of oil, and you’ll have no trouble Price the same for all three with same MINI-2 in this area. channel count Transmitte) 2x4 15/32x In addition they include transmitter, antenna ft. Another modification which John receiver, servofs) or (block), mead Rx battery 6-5/32 in thought was important, was the substi­ and charger Transmitter uses 9 volt dry Receive) 23/32x1 13/32* battery monitored by LED voltage indicator 1 19/32 tution of a more conventional swash- DELUXE SYSTEM, same as above includes Volume 1 61 cu in plate rather than the plastic ball and meads, charging lamp, meter in the Tx. Weight 1 02 socket assembly supplied with the kit! charger for both packs Cu))ent d)am 16 ma Rx & Tx in both Standard & Deluxe systems Operating voltage 4 8 to 6 volts J This swash-plate is held together by expandable to a full 4 channels from a 2 Seivo 23/32x1 3/8x1 1/2 in or 3 channel system at minimal cost spring tension working on one side Weight 1 2 or 2 Channels 2 Servos — $149.95 against the servo rods on the other side. 3 Channels 3 Servos — $1 89.9 5 Fiequencies All std 27 & I don’t think it’s too good an idea to pre­ 4 Channels 4 Servos — $2 39.95 72 MH2 Factory assembled only 27 MHz prices shown ECONOMY PRICED DELUXE load your servos like this, and besides, Add $10 00 for 72 MHz STD. Incoipoiates mead hattenes throughout main rotor loads could easily lift the Write for complete brochure on entire line of $119.95 plus charger Add $10 00 swash-plate up to the degree where you CANNON R/C SYSTEMS (27 MHz| lor 72 MHz could lose cyclic control. We just hap­ ’ 13400-26 SATICOY STREET^ $159.95. pened to have a Kalt swash-plate (or NO. HOLLYWOOD, CA. 91605’' Schluter) which adapted perfectly to the Æum m(213) · 764-1486 In Canada...H.&.W. ENTERPRISES · BOX 972 ■ REGINA, SASK. main rotor shaft by changing the brass tube size. Again, standard tubing does the job. I might add that the swash-plate tried the Schluter “Cardon” head but told me o f a "h o t” modification to the movement needs to be as great as you it did no better, so back to the original Veco 19 engine that the race car drivers can make it! This little gem is so stable, head. (Sometimes the designer knows were installing. I promptly purchased the it needs lots and lots of control input what is best!). After a few more flights, McCoy kit for the Veco 19, put it to­ to the main rotor to make it respond the oscillations stopped completely and gether, and tried the new combination properly. it flew like a dream. We were so sur­ the following day. Wow! What a little The tail rotor movement is just about prised at the sudden “ about-face” we bomb! That bit of horsepower increase right as shown in the instructions, and examined the head carefully and found really made a difference in its flying. It we didn’t notice any difference in per­ a set screw had worked loose (no Lock- now gets up with the big boys and scats formance between the two tail rotor tite?) and permitted the head to do a around the sky like the spirited bird it’s blade dimensions recommended. little teetering on its own. Subsequent named after. Initial flights were very smooth and tightening of the set screw put it right Now available at about $25.00 are stable except it did exhibit the slow rate back into the pitching mode o f flight, small, specially designed floats for the pitching up and down, so often encoun­ so we deliberately took it out and it’s Lark, which make it about as pretty a tered with rigid rotor systems. We at­ been perfect ever since! chopper as you can get. The floats are tempted to cure this by installing the The following week-end was pretty made from a transparent colored plastic Kalt "teetering” rotor head, but that hot and the Lark didn’t lift o ff much material and could open up a new realm made it all the more unstable. We next better than a foot from the ground. Kim of sport flying if you haven’t tried it yet.

JULY 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 61 the machine for the remainder o f the show. HBR-2 Double Rudder There was a host of scale helicopters Outdrive Assembly entered for the static display judging. $34.95 First place went to Don Harris, o f Hun­ dealer tington Beach, Calif, for his outstanding inquires L-286, fiberglass project. Bill Natera, of invited Montebello, Calif., took second place with his Jet Ranger, and Lt. Commander Graham Hicks, o f N.A.S. Lemore, Calif., finished in third (Recent Chicago Nats r£ R lN E fliers and officials should remember ZCMLT/LS Graham, wen), also with a Kavan Jet // Ranger. The paint schemes and finishes PO Box 588 Saratoga Ca 95070 this year were utterly dazzling in their brilliance, and use of high-visibility col­ CUSTOM MODEL BOATING HARDWARE ors. Kinda makes one want to go to an artist’s school to learn how!! There ya go for another month fellas ... you might watch for the Micro Mold I should point out at this time that M.A.C. TRADE SHOW DB Autogyro kit which is now on deal­ training gear really isn’t needed on the Earlier this month, I made arrange­ er’s shelves. It would be an interesting Lark since the standard skids are set far ments to visit the M.A.C. Trade Show (and inexpensive) way to diversify your enough apart. You’d have to be a pretty which is an annual event held at the rotary wing activities. B.C.N.U. next lousy flier to turn it over, or “ get-a- Anaheim Convention Center. There had month. · blade.” originally been plans to hold an R/C All in all, the Lark helicopter is an helicopter symposium and instruction/ Ultra Dart.... Continued from page 53 excellent buy for the money, represent­ learning sessions, but at the last minute, medium 1/16 x 1/8 and lay them flat­ ing a compromise between the “ to y” they were called o ff for some unknown wise for assembly. Note that the stab type helicopter and the larger, more pre­ reason. However, there was no lack o f has no ribs... the boom serves as the cision machines. It flys and maneuvers R/C helicopter demonstrations at the center rib. exactly like the larger ones. . . is an easy show . . . every two or three hours each Fin: Cut the boom from light to machine to build and to learn on . . . and day, Ernie Huber and Mike Bosch (from medium 1 /8 x 3/8 and taper before pin­ it's easy to repair with hobby shop ma­ Germany) put on fantastic demonstra­ ning to plans, then build the fin on to it. terials readily available. It ’s just right tions with their Kavan Bell Jet Ranger The fin is pinned flat against the plans. for suitcase portability in case you drive choppers. Individual free-style flying Rather than pin through the wood, we an economy car too, ha! preceded their formation dog-fights, prefer to use “Pin-Downs” or “ Pin much to the pleasure of all. Clamps” to hold the fragile members in Ernie also flew the prototype Kavan place. Cover all surfaces on one side Alouette “ 2 ” helicopter which is due to only after adding dihedral and gussets to COVERUP! make the scene very shortly. The Alou­ wings as shown in detail on plans. Let ette “ 2’1· is a scale model o f the famous joint dry thoroughly. Sturdy, dark green vinyl covered French helicopter used by the military, MOTOR STICK AND PROP binders for your valued copies of police and customs officers throughout The motor stick is simply a hollow MODEL BUILDER. Gold logo. Europe. The kit features an amazing one box, terminated at the front by an insert piece main rotor blade with a diameter o f 1/8 X 3/8 from which the bearing o f 42 inches, weight about 5 lbs. with a hangs, and at the rear by the boom, .40 cu. inch engine, and standard 4 chan­ with a few strip formers in between at nel radio installation. The most outstand­ stress points. Pin down one side on your ing feature (to my way o f thinking) is board (due to the length, it is not shown the unusual and simple way that the full length on the plans) and add the Kavan control system has been adapted top and bottom strips, gluing well. Then to this model, giving it the capability of add formers and nose insert, gluing latter all maneuvers now possible with the Jet very well, as nose takes a beating. Add Rangers. boom with fin attached, propping up Anyway, back to the demonstrations, rear with a 3/8 wide strip so that a built- Both Ernie and Mike really showed o ff in left turn is achieved. Then cap the their champion caliber R/C flying, with whole mess with the left side, pinning pirouette take-offs, extreme quick-stops, lightly or taping down with a few strips loops, vertical wing-overs, backward o f masking tape. Let this assembly dry take-offs, and a fast paced low altitude at least two hours to avoid warps. Then Only $4.95 each, two for $8.95, or routine which included leap-frog forma­ lift from board and build up wing mount three for $12.95, postpaid in the US. tion flying. on the stick, to get a precise fit. Do not Canada and Mexico add 30 cents per Have you ever seen an R/C chopper glue it to stick . . . pin it in place (with binder. Overseas add 50 cents each. stand on its tail at a 75 degree angle and Saran separator) while glue sets. California residents add 6% sales tax. make high speed circular flights (side­ Bend a shaft from music wire, insert NOTE: One binder will hold 1971 and ways) at constant altitude? It’s an amaz­ in bearing, add a couple o f brass washers 1972 issues. One each for 1973 and 1974. ing demo which happened daily at the (or teflon if you can find them at Bahr- show! man Studios) and the plastic prop. Make MODELS John Simone Jr. also demonstrated a90 degree bend in front o f free-wheeler his beautiful Lockheed L-286 helicopter hub and snip o ff the wire. No winding BUILDER with Schluter "Gazelle” mechanics, un­ hook is needed ... this model is wound Box 4336, Santa Ana, Calif. 92702 til an unfortunate engine failure retired from the rear like an indoor model.

62 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER MODEL# BUILDER presents the MASTER MODEL BUILDER

A x ’ « w of the month λ CONTEST

COLBERT INDUSTRIES, manufacturers of PANA-VISE, the unique hobby vise which turns and tilts to any position, in conjunction with MODEL BUILDER magazine, is sponsor­ ing a design competition for MODEL BUILDER readers.

This monthly contest will be judged for originality and/or craftsmanship for all types of models (excluding plastic static scale). Entries will be judged purely on the basis of photo­ graphs and drawings supplied by the builder of the model. Emphasis in judging will be on originality, technical achievement, and craftsmanship, as found in the submitted material.

A MODEL 301 PANA-VISE WILL BE AWARDED EACH MONTH TO THE WINNING ENTRY

1 3. If photos cannot offer sufficient information about the model, the construction drawings may also be submitted. Drawings should be dean, pencil draw­ ings with all pertinent dimensions indicated. A p rint o f the drawing is acceptable. 4. A written description should be included with photos and drawings, explaining in fair detail any unusual features o f the design, and explaining any unique technical difficulties that the model may have achieved. 5. Please do not submit any designs that have been accepted for use in another publication. MOD­ EL BUILDER requests first option on publishing any submitted design. Payment for published designs w ill be at our regular rates. Any prizes awarded do not represent an agreement to publish any design. 6. Entries will be judged by the modelers on Requirements for entries: MODEL BUILDER'S editorial and art staff, and all 1. Any type model may be entered (aircraft, cars, decisions o f the judges w ill be final. boats, etc.). Kits may be entered i f significant modi­ 7. Postage must be furnished if return of sub­ fications have been made to the stock kit. m itted entries is desired. 2. Do not send the actual model. Send only black 8. Deadline for entries in the first contest o f the and white photos, showing at least three views o f series is July 1, 1975, and winners w ill be announced the model. Include some familiar object in at least in the September 1975 issue. Subsequent entries w ill one photo to indicate the size o f the model. Try to be due the first o f each month and winners w ill be include photos o f any significant details. announced the second month following each dosing.

Send all entries to: MODEL BUILDER/PANA-VISE CONTEST 1105 Spurgeon St., Box 4336, Santa Ana, California 92702

JULY 1975 63 KING FISH

KITB24 $24.95

Patterned after the sleek Ocean going Sailing Yachts, the King Fish is a beautiful sight on the water or on your mantlepiece. Fine per­ formance is the keynote when operating Free Sailing or Radio Control. Construction is un­ believably simple. Inter-notched Die-Cut Frame features Plywood for strength and long life. Printed-planked Deck is die-cut and ready to slip into the Rub Rail molded into the sleek Plastic Hull which is finished except for minor trimming. Kit is unusually complete and fea­ tures Mahogany Deck Cabins and trim, Brass Chain, Cast Metal Fittings, Cloth Sails, Rigging Cordage, Mast and Boom Material, Metal Rud­ der. Metal Keel comes with Lead Ballast cast in place. Step-by-Step Plans show simple as­ sembly as well as operating instructions. Base shown not included. HEIGHT 43" LENGTH 3 4 " BEAM 6 Ά "

STERLING MODELS . 3620 G' ST. PHILA.. PA. 19134. If no dealer available, direct orders accepted —with 10» additional charge tor handlinq and shipping (60c minimum in U S . $1 25 minimum outsideul>.) C Catalog of entire line of airplane control Sne model kits R/C scale and Trainer kits, boat model kits, accessories, etc 50c enclosed □ Secrets of Model Airplane Budding" Including design, construc­ tion. covenng. finishing, flying, adjusting, control systems, etc 25c enclosed □ ‘ Secrets of Control Line and Carrier Flying. ' including preflight, soloing, stunting. Carrier rules and regulations. Carrier Hying hints and control line installation Instructions. 25c enclosed No checks Only U S money orders or currency accepted

Name______

Address City State _ Zip .

KIT DIO $ 12.95 GAZELA PRIMEIRO 6 pock — 1 0 lbs. This 1883 Barkentine is the last Square Rigged Ship of the Portuguese Fishing Fleet, which yearly sailed to the Grand Banks. It is now a part of the Philadelphia Maritime Museum, and is permanently moored at its own Dock, Pier 15 North, Delaware River. Our Kit is rel­ atively easy to build and features Step-by-Step Assembly, as well as Rigging. Plans guide you unerringly thru hours of pleasure. Exquisitely detailed Kit contains Printed Cloth Sails, Ma­ chine Carved Pattern Grade Pine (or similar) Tapered Masts and Yards, two colors two sizes Rigging Cordage, Authentic Decals and Flags, beautifully detailed Cast Metal Fittings, Mount­ ing Pedestals and Base etc. HEIGHT 8 " LENGTH 14"

64 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER " 2 V 8 G 1 7 For Free Flight, Control Line or Radio Control Control or Radio Line Control Flight, Free For like Model. Nose Canopy, Top Canopy, Navigator’s Bubble, Bubble, Navigator’s Canopy, Top Canopy, Nose included is Wire Material, Covering Formed Parts, Wheels, Authentic Decals, Hardware Motor. or Electric Engine, CO.. Gas, supplied), ner Enclosure, Cowlings ner and Also Cowlings Enclosure, Nacelles. Kit etc. etc. Parts) Line Control (that includes (as Powered Rubber can be built ways: many Museum­ a makes version Any Scale.* Static or simplify assembly. Included are Chin Turret, simplify Turret, Included Chin are assembly. Gun­ Tail Canopy, Tail Turret, Ball Turret, Top tions. Many highly detailed and Plastic Parts tions. Parts detailed highly Many and Plastic B O E IN G B SUPER DETAILED ’ STICK MODEL” KIT SCALE: % "= 1 FT. SPAN 3 9 " LENGTH 2 Prototype. Frame members are accurately Die- Die- accurately are members Frame Prototype. numbered to insure fast accurate assembly as as assembly accurate fast insure to numbered instruc­ and Plans on the Step-by-Step shown Designed and Designed built by Aircraft Boeing Com­ was the offensive" pany, B17 Fortress legendary Flying aerial our of backbone and guts “the terri­ enemy to penetrate the Squadron abled Cut from finest quality part and Balsa every as General Hap Arnold put it. The tremendous tremendous The it. put Arnold Hap General as fire of power its thirteen 50 caliber Machine Guns and the special formation flying, en­ tory without fighter escort. Our faithful Model is a and highly detailed replica of the ______Zip ______S tate ______C ity INC. MODUS PHILA. PA 19134. U S A ______$1.25 minimum outside U.S ) Secrets of Model Airplane Building including design, construe Secrets of Control Line and Carrier Flying Inciudmo pretligh,. Other power and equipment not included. Catalog of entireand Trainer line of kits,airplane boat modelcontrollion, kits bne covering,modet accessories 25ckits enclosed R finishing,C scale etc 50c flying,enclosed adjusting, control systems, etc soloing, stunting. Carrier rules and regulations. Carrier flying hints and controlchecks line Only U installation S money orders instructions or currency accepted 25c enclosed No ‘ Dry Kit. Rubber Power Material supplied. additional charqe tor handlinq and shipping (60c minimum If no dealer available,mUS, direct orders accepted —with 10 N a m e ______A d d re s s STERLING MODELS . 3620 G' ST. PHILA., PA. 19134.

JULY 1975 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! NEW FROM TYRO NEWLY MANUFACTURED RACEPLANES 1/4 X 32 SPARK PLUGS Now you can once again run your old ignition engines and join the Old Timer movement. $2.50 each, plus 50d postage.

Ignition coils, $6.00 plus 50d postage. SC A L E DWGS TYRO PLAYBOY SR. 80" SPAN Spark plug (not a "reject") Quick easy reference brochure identifying over Old Timer R/C or F/F. Wing ribs, ply­ tie tack or lapel pin. A neat 700 Raceplanes, 1908 to present. way to carry a "spare" ! wood, pylon, and all curved parts milled. $5.00 plus 50 cents Formed wire gear. Stressed for R/C. Send 50< for Brochure to: postage and handling. Meets all Ο. T. requirements. List, 25 i RS HIRSCH 8439 Dale St. $39.95 Postpaid REMCO MFG. CO. P.O. Box 22414, Denver, Colo. 80222 Buena Park, Ca. 90620

ence point for later adjustments. Now (make sure motor is inside can) and re­ glue wing to top o f mount, keeping it lease prop a moment before you let level to stab. model go. Climb w ill be very slow and After this is dry, unpin the mount majestic, with nose high. If model stalls, sides from motorstick and slide it off try moving wing back a bit at a time, (here is where you will see if you were or bending the bearing for side thrust. successful in n o tg lu in g itto stick) so you The built in left turn and stab incidence can add the mount bands. Remove the should not be changed. Once climb is TYRO COMBO - 38-1/2" SPAN bearing and double up two short rubber smooth, you can pack in the turns for Coupe D' Hiver and unlimited rubber. bands so that they are a fairly tight fit on long motor runs. Rotate motors for 99% pre-cut parts. Wing and stabilizer stick. Then slide them along until they longer llife. ribs cut out. Pre-cut Austrian tissue. bracket the wing mount markings. Slip Since this model is so different in Completely assembled FOLDING front the mount on and slide the bands over appearance and flight (it sort o f floats end assembly with molded balsa prop the mount, thus clasping it tightly to blades. in the air like a 747) from most large $10.95 Postpaid stick. It should be loose enough to slip rubber models, it is a real crowd pleaser. forward and back for adjusting, but not We hope you get as many startled looks so loose as to allow unintentional shift­ as we did when we brought Ultra-Dart ing. Now spray the fin with a light mist out to fly. For the next Nats, we might o f dayglo orange and you are ready to even try one built to the Unlimited area fly. lim it o f 300 square inches. That would FLYING be enough to lift Carl right o ff the After all, this is what it is all about, ground, making it the first man-carrying so grab your winder and bring a friend Dart. Frank Ehling, what have you along tö hold the model during winding. started with this madness o f enlarging TYRO GLIDER If you do not have an outdoor type Delta Darts? · All pre-cut parts. Single kit, $1.49 plus winder, make one from a small hand postage. Three kits for $4.50, postage is Products...... Continued from page 19 prepaid. drill with a screw eye or heavy cup hook firm ly anchored in the chuck. Solder or able crystals. From the time you open epoxy it in place. The screw eye should the distinctive green and black box, and SEE YOUR DEALER lift the lid off the molded styrofoam OR ORDER DIRECT be opened up slightly so the loop of motor can be attached. packaging, one message comes through loud and clear... Quality! The Futaba TYRO MODEL & SUPPLY Have your helper firm ly grip the prop shaft between his index finger and system, manufactured in Japan, and mar­ P. O. Box 11511, Palo Alto, Ca. 94306 thumb, holding body up at about a 30 keted in this country by Futaba Indus­ Phone: 321-2898 degree angle. Then remove motor from tries, U.S.A., in Compton, California, is rear hook and can. Motors should be a well thought out, versatile unit. Most Bend the rear rubber hook and “ can” lubed in advance with Sig rubber lube all components are interchangeable (simply a device to contain the motor or Johnson’s Baby shampoo. Keep lube throughout the line, from the two chan­ and prevent stick bowing) from music away from knot. Attach the motor to nel through the six channel. There are wire, insert them through stick, bend winder hook, then stretch it out horizon­ four servo configurations available. The ends and glue in place. The rear hook tally about 3 to 4 times slack length. FPS6 and FPS6L are identical except should be bound with thread and glued Begin winding, moving in as you wind. for direction o f rotation on a given com­ well. Glue stab to boom bottom. Note Only put in 50 to 75 turns on the winder mand (clockwise and counter-clockwise). that the covering should be on under­ (3.75 to 1) for test flight. When your The FPS7 is the same size as the others side, to allow balsa-to-balsa glue joints. winder hook approaches the rear hook, (all are miniature) but is a heavy duty Add the prop assembly to nose, make stop winding, grasp the motor just in version and is completely waterproof up a motor from 4 strands o f 3/16 rub­ front o f winder, and let o ff a few turns. (Boaters! Pay attention . . . class is in ber strip (tie the ends in a square knot, Like magic, a small loop will appear session!). The FPS8 unit is a slower but tightly). Now add the motor and balance which can be easily removed from wind­ stronger servo for retract landing gear or the whole assembly on your extended er and attached to rear hook. Now you flaps. finger, marking the point on the bottom are ready for your first power flight (test All o f the new series o f transmitters of body. Note the balance point on plans gliding is pointless with this design, (three or more channels) feature the and mark the point for LE and TE of since it flies so much like an indoor slant type case, which puts the antenna wing on body. This will give you a refer­ model), so grasp model under wing up in the air in front o f the flier when

66 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER IF THERE WAS AN OSCAR FOR PROP PERFORMANCE... TOP FLITE WOULD WIN IT HANDS DOWN! Look at the record. Our props hold more championships than any other make. You can always count on them. The fact is: TOP FLITE props PERFORM! We’ve been making props longer (and better) than anyone else. Our quality-control comes from years and years of experience. They’re precision-carved, balanced and fuel-proof finished. That's why they’re used by *So more winners of Nationals COMPLETE SIZE AND PRICE LIST and World Championships REGULAR REGULAR SPEED SUPER-M NYLON than any other make. T O P F L IT E P O W E R P R O P T O P F L IT E T O P F L IT E T O P F L IT E

DIA. PITCH Pr 0ΙΑ. PITCH Pr. 0ΙΑ. PITCH Pr. DIA. PITCH Pr. DIA PITCH Pr. And, TOP FLITE has the

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8 3V* - 5 - 6 - 8 .65 7 4 - 5 - 6 60 8 71* -8 -6 1 *-9 95 11 6 - 7 - 6 1.20 7 4 -6 .60 There are seven designs, each 9 4 - 5 · 6 - 7 - 8 .75 8 4 - 5 - 6 65 9 7-12V*13-13V* 1.00 12 6 1 30 8 4 -6 .75 1 with diameters and pitches to 10 3V* - 5 - 6 - 8 .85 9 6 -8 .75 10 8 · 8V* · 9 1.15 14 6 1.65 9 4 - 6 - 7 95 meet all of your flying needs. 11 4.5-6-7.7V4-8-8V4 .95 10 6 -8 .85 1 ' POWER PROP 1 10 3V* · 6 1.00 12 4 5 - 6 - 8 1.10 11 4 - 6 - 8 95 7 5 -6 85 9 6 .95 11 4 - 6 - 7 - 8 1.20 I So look for the Props of 1 13 5V* 1.15 12 4 - 5 · 6 · 8 1.10 8V, 8 - 8V, · 9 95 10 6 1.05 12 6 1.50 Champs at your dealer’s 14 4 -6 1.35 9 7-7V*-6-6V*-9 11.00 11 6-7-7V*-7W-l 1.20 r ______1 NOW! 9V, 8 -8 V * -9 1.10 12 6 1.30 J

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JULY 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 67 The people at Futaba pride themselves on the accuracy o f their transmitter’s 10’ SPAN emitted signal. Sales manager York Dai- mon told me that they reject over 80% o f thecrystals they receive. This is borne 1/4 SIZE CESSNA 310 TWIN out by an informal experiment I wit­ nessed. Recently in Albuquerque, we took out two Futaba transmitters on the same frequency and launched a sailplane carrying a receiver tuned to one o f them. After setting the trims on the two trans­ mitters as close to the same as possible, we were able to transfer control from one to the other by turning o ff one and turning the other on . . . with no visible effect on the airplane. While I certainly don’t recommend that you do this on a regular basis, it does give you some idea o f how close Futaba holds their toler­ ances on frequency output and recep­ tion. The Futaba system uses molded servo trays which feature a “snap-in” mount. The servo is cushioned on rubber grom­ mets, and is held in with a hooked plas­ • Fast Assembly • Moulded Cowls • 3 piece wing tic fitting. To change the servo from one • For .60 Engines • Flies Like A Trainer • Machine Cut Parts • Rolled Plans • 120%" Span • Designed and Produced plane to another, all you need to do is • Hardware • 18 lb. Flying Weight • By Bud Nosen press on the hooks and the servo lifts out, to be pressed into place in another An almost exact copy of Cessna's popular Twin Engine aircraft. Designed by Bud Nosen, flight tested tray. The switch harness has a separate and modified to provide the smoothest flying kit of its kind on the market. Large lateral area makes the charging plug and the high quality switch loss of one engine hardly noticeable. Engines over .60 not recommended or needed. has a hole molded in the toggle. This enables the modeler to insert a 1/16 Write for inch wire, allowing the switch to be our illustrated BUD NOSEN MODELS mounted inside the plane, with only a catalog -25« 522 15th Ave., Box 105 C, Two Harbors, Minn. 55616 wire protruding through the fuselage side. The overall performance of the Fu­ THE LARGEST taba has been excellent. Range is far greater than necessary, and control has Z a n b c PLANS COLLECTION! proven to be very smooth and reliable. l/ 7 z Scale 3 - Views From the silky smooth sticks, to the send stamp /or list O. T. F/F L IS T ...... 75* ratcheted trim levers, through the rugged receiver and servos, the system has per­ RUBBER/TOW L IN E ------75* formed flawlessly. Priced at $319.95 for Ο. T. FLYING SCALE - - - 75* the six channel system, with all nickel cadmium batteries, and charger, I would recommend the system to anyone. JOHN POND The Futaba FP-6EN System is avail­ Old Time Plan Service able from Futaba Industries U.S.A., 630 West Carob Street, Compton, California P.O.Box 3113 Richard M Zasadney 90220. Retail price o f the six channel Z4>6>4 Beck St. S.£. San Jose, Calif. 95156 system with four servos and all nickel Warren, Ohio 44484 Phone (408) 292-3382 cadmium batteries is $319.95. The Aquila sailplane kit is available from Airtronics, 45 East Joseph St., the transmitter case is horizontal (This who will buy the six or seven channel Arcadia, California 91006. The wood keeps you from poking your flying bud­ units that presently come with the train­ fuselage version retails for $59.95 and dy in the bellybutton . . . or elsewhere!). er line. the fiberglass version is $79.95. · These transmitters also feature a trap The receivers have a strong molded Plug Sparks.. Continued from page 32 door on the side of the case, allowing plastic case with a molded-in connector access to the interchangeable crystal block which eliminates that “ spider’s miums, on the other hand, exhibit the without removing the back o f the trans­ nightmare” of wires common to many startling flat plateau that lasts 70% o f the mitter. All of the multi-channel units radios. The plugs are a three pin, gold life o f the charge. Keith uses 2.4 volts (more than two channel) also have a plated, molded type, with a molded rim (2 batteries @ 1.2 V), but the writer buddy box switch, allowing two similar around each wire to eliminate breakage finds three batteries, 3.6 V, is much transmitters to be used in an instructor- from heavy handling. Alongside the con­ superior. Matter of fact, you don’t need student type application. Futaba is one nector block is a plug-in socket for the boosters this way! (The writer often of the first o f the radio manufacturers to receiver crystal. One nice feature of the wonders if glow plug operation would realize that a newcomer to R/C, who is connector block is that each output have become popular if nickel-cadmiums likely to start out with a three channel socket is plainly labeled. There is no were available 30 years ago). radio, is the guy who really needs the hunting to find where the elevator signal Thirdly, modern, multi-grade, deter­ buddy-box set-up ... Not the expert comes outa da little box. gent oils have additives that build up on

68 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER XX 0 0

HOT STUFF TM. GETS IT TOGETHER F L A S H ! HOT STUFF" IS NOW $5.70 PER UNIT Γ (Two large bottles) FAST THANKS TO TREMENDOUS AT YOUR HOBBY DEALERS NOW WORLDWIDE MODELER DEALERS AND DISTRIBUTORS SATELLITE CITY, P.O. BOX 1935 CALL (213) 899-2301 ARLETA, CALIF. 91331

the plug and short out in as little time Yes-63, No—47. bolt for $6.95 postpaid. He sez maybe as five minutes. Use mineral oil, non­ Prop. 8. .024 & .035 engines for .020; later he will have the Sky Raider and the detergent type, generally available at Yes-50, No-60. Spartan Bomber available. These kits are hardware or auto supply stores. As has That’s it fellows. All that has to be the same as those manufactured by Pop been claimed by the writer for a long determined now is when to make the Schreiber of the Country Club Aero time, the arbitrary use of SAE 70 wt. new rules effective. The writer favors Shop. oil is bunk. Unless an engine is in very after the SAM Business Meeting, as the The original rules were printed on the bad shape for compression, 40 wt. oil is Authentication Committee can be set Blue Bird drawings (The Blue Bird had perfectly adequate. Keith claims he is up then. to be scaled up). Under Jimmy Allen still running his brown Jr on it! Inte­ JIMMY ALLEN CONTEST rules, you had to build one o f the Jimmy restingly enough, Dan Calkins recom­ The writer is feeling pretty chipper, Allen designs: Bluebird, Skyraider, Thun­ mended 40 wt. oil for his Elf engines; a having heckled the Kansas City, Mo. derbolt, Yellow Jacket, or Silver Streak delicate gem, that we all will agree to. boys into staging a Jimmy Allen Con­ (Blue Flash qualifies, but is real light The argument for SAE 40/50 wt. oil test. Just received a letter from Bryan for those Kansas winds, being built out is that the surface speeds and loads in a Wheeler stating that the club has set a o f 1/16 sq. balsa). However, for this model engine are so low that any half­ date of Sunday, August 17, at the Shaw­ contest, John Pond plans will be good way sort of keeping things clean should nee Mission Park, in Johnson County, enough, as will be the subsequent kits from Wheeler. prolong the life of the engine indefinite­ Kansas. The meet will officially start ly. As a side note, the red hot FAI en­ at 12 noon. This will give you late risers Talking about the rules, the K.C. Mo. gines with 25,000 rpm values still have and church goers a chance to come to boys will allow laminated rudder, eleva­ piston and shaft speeds far below critical the contest well prepared. In all proba­ tor, and wing tip outlines, since bamboo values for proper lubrication. bility, either darkness or general fatigue seems to be a problem to the newer To summarize (and we will be doing will signal the end of the contest. fellows (hmph!). That will be the only this again!), a properly wired ignition To help things out, Bryan Wheeler, variation allowed. Such things as folding system with good battery contacts, clean 7604 Appleton, Raytown, Mo., 64138, props, extended wingspans, oversize and properly adjusted points, and good will have kits available for the Thunder­ props, etc., etc., are definitely out! solder joints, is a necessity. Really, fel­ lows, it is not as complicated as building SUPER QUESTOR RCM NEW ERA III GRAND ESPRIT a model. Properly done, ignition systems n> are reliable for years. ANNOUNCING A NSW STANDARD IN 50 FREE-FLIGHT PROPOSALS STANDARD CLASS RADIO CONTROL!» SAILPLANES o Just in case SAM SPEAKS doesn’t carry the results o f the recent SAM Free Flight Rule proposals (and to keep the ÆOVMÆ boys o ff my back), here is a quick run­ (pronounced oh-kool-nhl down on how the SAM membership re­ acted: For Thermal or Prop. 1. Change O/T date to 1947; Slope Soaring Yes-49, No-61. Prop. 2. “ Rare Bird” Event; Yes-44, STANDARD N o-64. 8Vj FEET OF BEAUTY AND GRACE Prop. 3. Authentication Committee; $59.95 WHICH FLIES AS WELL AS IT LOOKS Yes-82, No-19. DESIGNED FOR 1975 NATIONAL SOARING SOCIETY RULES Prop. 4(a). .020 to be a basic event; TECHNICAL DATA

Yes -65, No-44. Wing Span 99 9 «chas F u · Ftpng Stebilator and Rudder WtogAiM S iO sq m (S.63aq ft) Opeonal ue Spoilers Prop. 4(b). .020 class d ivision; Yes- Fuselage Length: 4 « 2 inches Ans-Stal Wmgtipe Aelorf 9 6% Fial Bottom Section Ptug-n 2-p*ce Wmg GLASS 54, N o-55. Flying Weight 40-44 ounces Plugin Tad Surface. Wng Loadng 7 5 oz-sq ft Roomy Rado Compartment Prop. 4(c). Rename to SCIF .020; COMPARE THESE DELUXE KIT FEATURES $79.95 Yes—56, No—58. □ All parts preoswn machined horn premium grade matenats □ Pre-dvaped fuselage sides with yg dnled holes tor accurate akgnment ROOM FOR BRICKS OR CONVENTIONAL RADIOS. Prop. 5. Menthanol Fuel; Yes-22, D Two giant ro*edpten sheets — over te s q .n o l detailed plans FLY WITH 2 OR 3 CHANNEL SYSTEMS. O Complete stop-toy-step bu*>ng instructor« plus tytng mtrucöom N o -88. □ Photo-Aid sheet detaang construction end radto mstaiiason O Total hardware package includes Canopy, Adjustable Towhook. Suotetcx horn Set. Pushrods. Spoiler and e* other hardware Prop. 6. Engines, post 1950 classifi­ oarnaiiiar _ .. . In Canada — Loqictrol Canada cation; Yes-37, No-72. AIRJRONICS Ouality Plui Performance 20O Danaormon Avonoe Prop. 7. Antique engine limitation; 43 I. S*. Joseph S*. / e.O. Bo« »16/ Arcadia CA 9100» (111) 443-4600 ______w.nnlpup. M .nltnbn^

JULY 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 69 NEW...TEMPERATURE COMPENSATED NYROD A ROD FOR ALL

\ I

NEW 8" METAL ROD IS PERFECT FOR THESE INSTALLATIONS - BEND AS NECESSARY NYROD inner tubing

NYROD outer tubing NEW! 8" METAL ROD SU-PR-KLEVIS P I A t N r I f I 0 ILLINOIS SOSA«

ing the next SAM Champs. Now how any ingenious ideas for prolonging flight about that? Two very successful radio time). ADJUSTABLE SERVO ARM control meets, the NMPRA Finals and Well, the old Georgia Fox, “ Gor­ the International Invitational Pattern geous George” Perryman is again offering Championships, have been held at Vegas. trophies in conjunction with the Lake ? What’s to stop us from holding the SAM Charles Nationals O/T Events for a com­ Champs there? bined rubber stick and cabin event strict­ Chambers has been in contact with ly for Juniors. Of course, the “ sleeper” Joe Beshar, SAM Pres., about the possi­ in this case is his very talented five year bility o f staging the Champs in 76 at old grand-daughter, Stephanie, who is a Vegas. One thing for sure, when Las real tough competitor to beat (Just like Vegas puts it on, they go whole hog! grandpaw). Best part about the deal would be the Anyway, fellows, let’s get out all fel­ extremely liberal housing accommoda­ lows under sixteen and see if we can tions for contestants and their wives. beat Perryman’s pride and joy. If you’re This accessory will permit you to preset Worth thinking about, men! going to the Lake Charles Nationals, the required arm length to match any PAUL BUNYAN - MOVE OVER! bring along that boy o f yours. Here is throttle or control surface movement Swedes have always been good for another event to take a whack at winning that is desired. We are now mfg. this stories, and the tale re-told by Sven some nice trophies. accessory to fit 9 different servos. Order Olav Lenden, President o f the large As noted in this column previously, by Stk. #. Swedish O/T Club, is well worth repeat­ all Old Timer Free Flight events will be held on Friday, August 8, from 8 a.m. .984 each ing. When Sven first became acquainted to 5 p.m. Come join the fun! Stk. # 3 3 -fits KPS 9 & 10 with Lars Wentzel, son o f Sven Wentzel, CLEANUP FUN Stk. #44-fits KPS-11 the réal aeromodelling pioneer o f Swe­ When the Bong Eagles make cleaning Stk. #45-fits KPS-12 den and founder o f the famous “ Vingar­ up FUN, that is news! On May 4, the Stk. #46-fitsKPS-14& 15 na” (WINGS) club in Stockholm, Lars Eagles held a so-called “ Clean-up and Stk. #47-fits World Eng. would tell this story about his father. Funfest” meet. As they put it, “ This is Stk. # 4 8 - fits D & R In the early days of Wakefield, the the one time to repay (tax free!) for the Stk. #56-fits EK rubber weight was not limited like its use of Bong Field, by romping down the Add .254 on direct orders. modern counterpart. This led to many runway in the spring and collecting all schemes to increase power duration, o f last year’s debris. Ecology, here we ROCKET CITY SPECIALTIES among which was Sven's idea o f two come.” 103 Wholesale Ave., N.E. motors with a clever clutch system that In conjunction with the Dept, of Huntsville, Ala. 35811 would allow the motors to run in series. Natural Resources (DNR), which pro­ One day, Sven Wentzel was testing his vided a truck, all contestants lined up at model under full power conditions. This the head o f the runway and made a This will be a Jimmy Allen contest one flight was a fairly long flight that clean sweep o f the area. It was amazing in every sense of the word. All are in­ came to rest on a concrete area. The ex­ how quickly a bag filled up! vited, but please, don’t mail any models hausted father had no sooner reached Thereafter, a Fun Fly ensued with to be proxy flown! There simply isn’t the model when he heard the clutch go all sorts o f merchandise prizes and even that large enough membership to handle “ click!” The prop began to revolve, the a spring raffle. There were darn few fel­ this kind of stuff. The idea is to get you model took o ff unassisted and Sven had lows who went home empty handed. or someone to show up with a model at two shags for the price of one flight! Now, that’s the way to keep a field! this meet! The model, incidentally, is still in ex­ “ NEW” O/T PRODUCTS VAMP THE SAM CHAMPS? cellent condition with two skeins o f While wandering around the MAC Leave it to those Las Vegas boys to rubber motor still inside the fuselage. Trade Show at Anaheim, the writer was come up with the latest name. . . The model has been dubbed, “ SW-39,” struck by the increase in old timer equip­ VAMPS. Vegas Antique Model Plane as it was used in the Coupe de Belgique ment, kits, etc. This is simply great! Society. Robert Chambers is the presi­ at Antwerp, in 1939. The clutch, w ith­ Foremost among the new items was dent and has rounded up 14 members out gears, is protected by a patent grant­ the C.P.M. (C.P. “ Lucky” Moody Model) already. ed to its originator, Rolf Bergwik. Truly Co. production of Barney Snyder’s bread To show the interest generated by a shame the rules have been changed so and butter rubber kit, the Pacific Ace. Chambers, several o f the Vegas night drastically as to make it prohibitive to What a great old flyer that one was! clubs have evinced an interest in sponsor­ use a gearing system (or for that matter, The kit is excellently done, so if you

70 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER Q u a l i t y

THE KAVAN STARTER USES A LOW CURRENT DRAIN, HIGH SPEED MOTOR WITH A 5 TO 1 GEAR REDUCTION VIA PLANETARY GEAR FOR MORE STARTING POWER. ADAPTERS AVAILABLE FOR STARTING WITHOUT A SPINNER FOR CARS AND BOATS AND ALSO DRILL CHUCK

AVAILABLE AT BETTER DEALERS EVERYWHERE OR ORDER DIRECT DEALERS SEE YOUR KAVAN DISTRIBUTORS

FIBRE FILLED PROP GLOW PLUG PRESSURE CARBURETOR

HOLDS SHAPE AND PITCH FOR MORE THRUST DOES NOT "WHIP” BETTER ACCELERATION IN LOW AND HIGH SPEED UNIQUE DESIGN ELIMINATES NEED FOR IDLE BAR, 5 HEAT BLIND MOUNTING NUT RANGES FOR HIGH OR LOW NITRO FUEL IDLE FEATURE

φ 0

MACHINED FOR SUPER STRENGTH NOT STAMPED

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WILL NOT "POP OUT”, FOR HAS SPECIAL MACHINED USE WHERE PERFECT PIN WITH SHOULDER SPECIAL COMPOUND ALIGNMENT OF PUSHROD FREE MOVEMENT WILL FOR HIGH PUNCTURE IS NOT POSSIBLE NOT SQUEEZE CONTROL AND KINK RESISTANCE HORN

m IÆ v MODEL AIRCRAFT INC., 1424 E. BORCHARD AVE., SANTA ANA, CALIF. 92705 TELEPHONE 714-8 35-77 88 JULY 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 71 MACS Show at Anaheim, May 3 and 4th FOR THE BEST in regards to the sponsorship o f an old timer towline event. Best part o f it all STANDARD CLASS RSTRO FLIGHT inC is that it can be either free flight or PIONEERS IN SILENT FLIGHT radio control! 13377 Beach Avenue The writer has assured Lee that this Venice. California 90291 will be brought up at the next annual AS-W15 SAM Business Meeting to be held July 30 at Denver. A t that time, the amount Wing span - - - -1 0 0 " of interest will determine which way the Area - ■ - 650 Sq. in. Flying weight · 38 Oz trophy(s) will be offered. If there is For 2 channel R/C enough interest both ways, who knows? STD. HI-START $24.95 Maybe Lee will go both ways too! Rugged molded ASTRO START - $29.95 So, you glider boys who have been plastic fuselage bemoaning the lack o f interest in old ALSO: MONTEREY-Span 100"-$34.95 time gliders have an excellent chance to MALIBU ------Span 75" - $25.95 put this event up as a permanent feature A S -W 1 7------Span 134" $79.95 o f the SAM Champs. Let’s see some in­ terest and turnout now, men! PARTING SHOT MODEL SPECIALTIES Al Heilman hit the nail on the head when he said that winning is nice, but the sheer enjoyment o f flying with SUPER GLUE friends having the same interest is better. That’s the magnetism o f old timer flying! DRIES INSTANTLY, BONDING ANYTHING TO Who ever heard o f taking your Schnuerle ANYTHING WITH AN INVISIBLE JOINT. powered Starduster or Satellite 225 1 Drop covers 3/4 sq. in. Tensile strength-4 ,0 0 0 P .S .I. miles for fun flying? Go where the spec­ FAR GREATER PENETRATION THAN WHITE tators congregate and where the real GLUE OR ALIPHATIC RESINS. fun is __ at the Old Tim er’s area. Amen ••OOft SříCiAtTlO to that brother! · S U P E R G t U ř Ideal for light-weight models; Coupe, * MCoivt· woer * fcBř. SUtttiri Nul ·* Peanut, Indoor, Wakefield, etc. F/F Scale...... Continued from page 39

NEW MEXICO RESIDENTS ADD 4% ONE OUNCE BOTTLE $7.95 theless charming and effective in their own right. Rubber Scale is an art form MODEL SPECIALTIES CO., 9117 LA BARRANCA N.E. that can stand on its own merits, the ALBUQUERQUE. NEW MEXICO 87111 translucent appearance o f colored tissue over light structures is so pretty that, to my way of thinking, there is no need to SCALE PLANS Model Aeroplanes attempt to make it opaque. Maybe rub­ byWESTBURG ber scale isn’t ‘true scale’ in that sense, n A Splendid Gift but why should it have to be? If you { / g Peanut vcf- Travel Air 2000 (2 Sheets) sion o f the '*Idc-»l” Nieu- want to build that kind of model, fine, port. Basswood and balsa 1" = 1.0 Ft. $4.00 construction, tissue cov- but paint isn’t (and shouldn’t be) con­ v r x u l r * * " ' lafjfcTw j , enrd. Complete kit sidered a basis for greater scale scores Waco ATO Taperwing ( ·· ) „ „ „ „ „ „ white tyred simulated * spoke wheels, plastic prop than tissue. Besides, you can always use 1" = 1.0 Ft. $4.00 jn d thrust bearing, pnntwood. reed, rubber strip and detailed Instruction Manual S4.49 ($5.00 securely pjeked and post gas, CO2, or electric, and these would Blackline prints, 30" x42", mailed paid i N.J. buyers add S'* sales tax. never be duration events for scale. But folded in No. America. Add 504 per Peanut Plan Special Five Peanut Si/c K it Plans. WWI and rubber is different. I use paint myself, Golden Age Biplanes. $1.50 post paid. Scratch Builder Super set for First Class & 654 for Air Mail. O ffer' Plan set and prinlwood for all five models $5.00 post­ but not to make the model opaque, just For rolled prints, add $1.00 per order. paid N J. buyers add 5T sales tax. to get colors that aren’t available in VINTAGE AERO 20-page Catalog $ 1.00 tissue. Send S. A.S. E. for complete list. DEALER INQUIRIES INVITED “ There’s another point I have strong PETER W. WESTBURG feeling on, but there seems to be some 834 Seventh St., No.6 VINTAGE AERO difference of opinion around the coun­ Santa Monica, Calif. 90403 I THE GLEN · TENAFLY. N. J. 07670 try. That is, regarding R.O.G. Rise o ff ground is fine for other power sources, want a real good flying model, try this Buzzard Bombshell. Another winner for but is a real pain for rubber. If there’s one! The price is $4.95 at your dealer. the rubber boys! anything I can’t stand, it ’s an otherwise Talked with Bob Oslan, o f Cal-Aero Think I mentioned Herb Wahl last pretty rubber scale model whose appear­ and looked over his 50 inch R/C Power­ issue, but Herb is putting out a 40th ance is ruined by an out-of-scale extra house. Real nice! (Oslan is one o f those Anniversary Brown Jr that will be every long landing gear. Rubber models need meticulous builders all o f us slobs hate). bit worth the initial asking price of big props for decent performance. That He just had finished the model to display. $150.00. Did you notice I said initial? doesn’t apply to gas, CO2, or electric. No kits ready yet, but it w on’t be long. No question about it, prices will go up We hand launch ours, and it saves a lot Bob is also contemplating several other as production gets started and good old of busted models. Besides, doesn’t a 50 inch size R/C models for the ever­ inflation takes over on costs. Herb Wahl Mustang or Spitfire look ridiculous fly ­ growing O/T F/F with radio assist. About runs his biz under Herb’s Model Motors, ing around with the gear down? Dave time someone put out a design for the P.O. Box 31, Crum Lynne, Pa. 19022. had a good point. If you follow that smaller engines! Gettum while they’re hot! rationale, then you should have flaps Ed Kelly, over at California Distri­ TOWLINE GLIDER (O.T., that is!) down and canopy open and be consistent butors, is also talking about his Korda Great news! Just talked to Lee Re- entirely in ‘landing configuration.’ On a rubber kit which will augment the 4 K ’s naud, of Airtronics, during the recent full size aircraft, the landing gear is a

72 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER 73

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radio 1975 Radio Control Buyers Guide accessories. accessories. It is edited by Eric Meyers, former for every radio control modeler. The tains over 1300 listings. descriptions, It and has prices pictures, for specs, radio cars, control airplanes, helicopters, boats, sailplanes, radios & editor of the RC extensive Products Directory. indexes for Contains easy reference. A must A, A, B, C, andC, D, B, A, A, Vz Use the 137S 77036 LOOKING FOR SOMETHING?

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DUES STRUCTURE - 1975 NSS #_____ 1975 Article V — Dues and Fees National Soaring Society Section 1: "Membership dues and number of subscriptions to the Journal of this organization 1975 Membership Application shall be in accordance with the following achedule: NAM E:______Dues Subscription a) Individual $10.00 1 b) Club 20.00 2 ADDRESS:______cl Family 15.00 1 (Any Senior or Open AM A member and any of his immediate family who are also AMA members.) ______PHONE:______d) Junior 5.00 1 (Any Junior AMA member.) AMA # ______LSF # ______Each subscription to the society publication SAILPLANE starts with the first issue published after payment of dues and continues thereafter TYPE OF MEMBERSHIP______through the membership year. Dues are payable prior to December 31 of each year for the ensuing year. Subscriptions commence Mail to: Mr. Larry Fogel, Treasurer with the first issue after payment of dues through 4508 Mission Bay Drive the membership year. In the event a member joins during the dues San Diego, CA 92109 year, he shall submit dues as follows: between December 1 and June 30, full annual fee, between July 1 and November 31, one-half the annual fee. Is this membership new ( ) or renewal! )? Members joining during December of a year shall also be members of the ensuing year.

74 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER go o ff in a mass launch is an unforget­ table sight. Probably more spectator ap­ peal than R/C pattern. It ’s immediately obvious who is winning, but maybe he blows a motor and is out! Now will the TWIN-WELD Caudron beat the Laird? Can the Goon outlast the Ike? Any rubber scale fan who hasn’t seen one o f these contests is EPOXY really missing some fun. That’s why I want to spread the gospel. GENERAL PURPOSE ADHESIVE IN PASTE “ Glastonbury flies WW I peanut dog­ fight the same way as F.A.C. Racing. FORM FOR EASY USE. It’s been done both indoors and out­ doors. So we have loads o f fun with these events. What are you other Rubber Scale fans doing?” As you can readily see, Tom has a great deal to say and has some rather in­ IDEAL FOR BONDING teresting opinions regarding rubber scale. Admittedly, I don’t agree with every­ • Hardwood to foam cores (landing gear blocks to thing, but there is plenty of food for foam wing cores) thought. I would like to receive com­ ments from other scale modelers and • Hardwood to fiberglass perhaps we can compare ideas and con­ (firewalls to fiberglass fuse­ lages) cepts that will further our scale cause. On Saturday, August 30, the Flight- • Fiberglass to Fiberglass masters are holding their annual Speed (joining fuselages and wheel pants) Contest in San Marcos at Palomar Jr. College. This special event is for both • Metal to fiberglass (cowl scale and non-scale models. The non­ attach fittings, marine hard­ scale models must fly 200 feet in a closed ware to boat hulls) course, while the scale models have to fly only 88 feet (88 feet in one second Can be cured in 5 minutes equals 60 mph.). However, this year they with heat will add the Thompson Trophy Race. It will be open to any aircraft that flew $ 3 9 5 in the Thompson, and this encompasses W ea. net wt. 4 oz. quite a variety from bipes to WW II aircraft. (I would personally rather see pre-WW II racers, but for this first time it is probably a good idea to have it as wide open as possible.) The span will be FIBERGLASS REINFORCED FOR SUPER STRENGTH restricted to 24 inches or less. At first glance this may seem like quite a res­ triction, but a pre-war racer with its low REMAINS FLEXIBLE aspect ratio can have an unusually long fuselage. The wings must not have under Available at your favorite dealer camber, and no parasols or high wing cabin configurations are allowed. All models will be hand-launched at the same MIDWEST MODEL time. The first model down is eliminated from that particular heat. There will be S U P P LY CO. additional heats until there is only one 6929 W 59th Si Chicago Illinois 60638 312-586-7101 model still flying. At least for this time around, the judging will be Mooney style with a 3- view required. I would hope that many of you will be interested enough to build for this MOVING TO SOUTHERN CALIFORNIA? new (for us on the West Coast) and exciting rubber scale event! · MAKE SURE YOU GET A HOME WITH A MODEL WORKSHOP ! ! Race and Win . Continued from page 11 FOR ALL YOUR REAL ESTATE NEEDS, CONTACT: the line. You must be able to move ANITA NORTHROP quickly without a lot of hunting through a lot o f unnecessary stuff. Technical Tip No. 5: A hot (tem­ SPECIALIZING IN: (714) 979-1050 RESIDENTIAL (714) 538-9625 perature) engine idles slower and longer O n l t than a cold one. Start as soon as you COMMERCIAL I Office at: . —* r can and run at high speed until you INDUSTRIAL 688 W. Baker St., have to idle. The extra heat from running LAND REAL ESTATE Costa Mesa, Ca., 92626 fast as long as possible gives you your best chance to get through the idle.

JULY 1975 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 75 /Challenger H, second to none !

-AND THE “ ONLY·· STARTER IN THE U.S.A. DESIGNED TOTALLY AS A MODEL ENGINE STARTER. IT'S NOT TAKEN FROM ANY OTHER PRODUCT, LIKE OTHERS ARE ...... -STARTER GOOD ENOUGH TO BE REQUESTED BY THE U.S.A. INTERNATIONAL TEAM FOR THERE OWN OFFICIAL USE. TO DATE IT HAS BEEN TO R/C, SCALE, FREE FLIGHT AND OTHER EVENTS, PLUS NOW BEING USED BY THE A.M.A. SHOW TEAM .... -STARTER “ GOOD'' ENOUGH TO CARRY A FULL 5 YEAR WRITTEN GUARANTEE ON PARTS AND PERFORMANCE .. Do you really want anything less than the tjO N IC -lR D N IO B — INC. 2 South SYLVANIA AVE. PH I LA..PENNA. 191 II Th> World» L«rg«»t H«nuf»ctur«r of Hod«l Eng in« Electric Starter».

The next problem is to get o ff with­ out and wait is ideal. Soon it becomes land. Do this and the airplane will take out mishap. If your ground handling is rhythmical. care of itself. poor or you know the next guy has Technical Tip No. 7: The only place When you are finished, check your trouble, delay your start for half a to judge a prop’s quality is in a race. If plane over carefully. Do not tinker, just second so they can get out o f your way. you have determined what size and pitch check. Get it ready for the next race You want ten laps outside safely. The is best for you, then sort them at con­ now. Change the plug and clean it. Re­ rest will come. tests where you have a “ freebie.” Take tighten the prop nut. The wood com­ Rule No. 4: Do not cut . .. Let the off that prop you know is good and presses as the day goes on. This will hotdogs work themselves into cut posi­ mark it for a d ifficult race. Try new save losing your prop when a loaded en­ tions. A one lap lead is a bunch and you props when you have very weak compe­ gine backfires on the line. You can also will have it when they cut. I am not tition. Your time will tell you which to run a pin through the drive washer, saying you should not race. You are save, but allow for the fact that when spinner backplate and 1/16 inch into there to race . . . but keep your cool. you are pushed you fly tighter. This the prop if your engine loses props often. Technical Tip No. 6: Smooth is fast. system assures a ready supply o f good A 4-40 screw tapped into the drive Every control deflection is drag. Trim props for big races or for that fella who washer with the head cut o ff works fine. your plane to fly itself on the straights. you want to beat really bad. I had four I have presented very few tips for The ideal lap is made with 6 control proved good props saved for the Na­ going faster. Consistency wins races, not movements only. Roll, up elevator, roll tionals.’ Fly to save the prop when you just speed. Slow planes and flyers win

76 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER races if they are consistent and avoid mistakes. Agreed, this does not sound like a very exciting way to race. After When was the last time trying the “ go fast” method and then the “ go sure” method, I discovered I you were grounded by a bad part ? enjoyed winning. That is exciting! · A lot of hobbyists have discovered the Valencia...... Continued from page 15 pleasure of owning a radio-controlled model Less expensive, easier to build, and helicopter. still very fast is the 1/2A Stick from Unfortunately, a lot of them have also discovered the agony of needing a replace­ GMC. Certainly not to be outdone, Ace’s ment part. Upstart II made a creditable showing, That's where SC Modeler can help. though the fastest one was modified We carry replacement parts for all pop­ with swept wings. ular kits. Just call us at (312) 697-3737 to Racing ended in an exciting way . . . find out if we have the part you need. SC Modeler also sells cars, boats and air­ a four-way tie for first! There was still planes, in kit form or ready to fly. And our time and no frequency problems, so experts are always available for technical they decided to fly it off. Although to advice. my eye, Robert janiger’s Upstart was a That's why beginners and experienced shade faster, Tony Naccarato outflew modelers alike are happy to know about SC Modeler. The place to buy a helicopter. him with tight, quick turns to take the Or a helicopter part. overall win. The first 10 finishers were: Tony Naccarato 1st Original #38 Robert Janiger 2nd Upstart modified Ben Strasser 3rd 1/2A Stick .C. MODELER Dene Jones 4th 1/2A Stick HOBBY SHOP Cal Barnes 5th I/2A Stick 995 North McLean Avenue, Elgin, Illinois 60120 Bobby Baker 6th Quickie 200 Ed Noulin 6th 1/2A Stick George Baker 6th Quickie 200 Ron Clem 7th Tigercat slope&thermal soaring sailplane Niel Sweeney 8th 1 /2A Stick The Valencia Valley Headwinds and Tom Schmactenberger are to be com­ The Hi-Performance Compact" plimented for the race; it was an out­ FEATURES standing way for both the competitors and the spectators to spend their day. contour-sanded wing ribs SPCcinctiiONS They proved that 1 /2A racing has every­ wing span 72 inches machined balsa & plywood parts length 39 inches thing. These planes look fast, sound fast, weight 24 ounces and turn fast! All they lost by not flying plug-in wing panels & stabilizer the bigger sizes of racers was the ex­ spruce spars pense! all flying stabilizer Try it yourself. · 8 hour building time Sailing...... Continued from page 27 Γ — M*S LIMITED in a future issue. Other changes include it not at your (teater, order direct price $27.50 C aliI Res add 5$ 7a* dealer inquiries mv ^ 4 — I I ----Cot39H5L Λ Cat,! 90039 the installation of the jG Products radial jib fitting. I’m quite pleased with this device, and will replace my wooden jib club with a fiberglass arrow shaft of NFFS MEMBERSHIP AND RENEWAL APPLICATION equal strength, but lighter weight. (Make checks payable to; National Free Flight Society) This will allow the jib to lift better on reaches and runs. Figure 1 makes an Mail to; f e e s important point. For proper operation, yrs the jibstay and the axis o f the jib club W. Terre Haute, Ind., 47885 1 yr 2 swivel must be parallel. On the proto­ RESIDENTS OF FOREIGN COUNTRIES S6.00 S1 1.00 type YANKEE, this required that the Age 19 AM A Members 6.00 11.00 U.S. entire fitting be mounted on a shim and up Non-AMA Members 7.00 13.00 RESI- block as shown. Age 15. 16, 17, and 18(Semor) 3 5 0 6.00 DENTS Age 14 and under(jumor) 1.50 2 5 0 The most interesting modification has Family membership* 1.00 2.00 been the installation of a SAIL EN­ All members receive NFFS Digest. Name AJMA No. GINEERING Proportional Sail Control Family membership fee includes System. This winch is so constructed all additional family members, but Address that the position of the winch arm fol­ no additional copies of the Digest. lows the position of the non-neutralizing Ages are as of July 1 of current City, State Zip winch lever on your transmitter. While year. Please circle applicable fees. it took some getting used to, the longer New Member Q •Please list family members Name I sail with it, the better I like it. I find Renewal O myself using the winch much more than Address Change □ AMA No. the other type, and I expect with a light Current expiration date: boat like the YANKEE, this is going to Month Year show up in increased boat speed. Ad-

JULY 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 77 that nobody has a boat just like his. Fred, I ’m going to prove your undoing, ‘cause now I want one too! Ray Gefken, o f Newark, N.J., de­ signed the catboat, and her vital statis­ ryJÍJjA Afatiocaufie tics are as follows: 41“ »WGSFAN. 04* F o w l*. FO« mtJStO ·* < "·* ·* 27 V2" WINGSPAN FOR CVHimOL i r TO TNMi cmamncls M VJ - WMOSPAN. .020 ROWCR RUBBER. C02. 0R OTO FOWCR A bit LOA . . . 30 inches * MAOMnCCNT «NOTION 0» AN AU.-TI** OF NOSTALGIA ANDA OCUOMT TOBUILQ r iK M l'f AIRCRAFT. TO« PU.SC ANO SMALL «AT« Beam . . . 15 inches ♦ 7.95 RAOO CONTROL UNITS CAN Bl A TRUC ClAiSC FROM THCOOIOCN «RA“ FLOWN TREE FUOMT ON RUBBER. D ra ft. . . 6 inches AND COMING SOON KITS INC LUOC TOR OUAUTV PRINTCO BALSA, DC CALS. ANO SUPf R OC TAIL « ANS Disp.... 15 pounds Th« Keel bulb . . . 4 pounds S ttá rm 3h C3B Frames... 1/4 inch ply Λ * WINGSFAN. 04· FOWtR. FOR RAOO CONTROL UF TO THMC CHANNCLSI» · .. Skin ... 3/32 inch ply A «STORY NAAlR WTOW WORLD WAR II. Auxiliary pow er. . . Mabuchi No. 56, 8:1 gearing 3 v., 1/2 amp Drum winch . . . 1,5v., 1 /3 amp FLYLINE MODELS R/C . . . Heathkit GD-19, with three SEE YOUR LOCAL HOBBY DEALER' 10643 ASHBY PL FAIRFAX. VA 22030 frequency option Φ As the photos show, Fred has done a good deal o f original work on the machinery in this little gem. By giving PEAPOD POWER up on the auxiliary power, and used commercially available winches, you You'll pass by the fleet when your boat is powered by CARR SAILS. With more might be able to drop the weight to 12 competition wins in more A.M.Y.A. classes than any other sailmaker, we know what an pounds or so and put a good deal more important part of success sails are!!'.! Act now and this MODEL BUILDER Special will allow you to suit up your PEAPOD for only $20.00, a saving of 1/3 from regular prices. o f it in the keel. Wouldn’t a herd of Write for our off-season savings in other classes and for a copy of the 1974 brochure and these be a nifty sight with all the wash orice listing!!! hung out to one side on a downwind run? Fred, that gaff-rigged main with Specify color: white, gold, red, dark blue, light blue or green. the mast hoops is going to generate a lot Specify main lu ff required: bolt-rope, dress hooks, double luff. of interest. Anyone wanting more infor­ Give AMY A boat number and choose numeral color: black, white, red. mation can write direct to this column. I’d like to tender my thanks to Fred Make check or and Ray for their cooperation in provid­ money order payable to: C A R R S A IL S ing the photos and data on the cat-boat. 7607 GRESHAM ST., SPRINGFIELD, VA. 22151 I wish there were more like them . . . boats and men!!! (As a judge fo r the WRAMS show in White Plains, Fred's CLOUDBUSTER RACE WINGS "Cat" was one o f our selections for a prize in the boat division, though it did not place, wen) Since our reporting o f the prototype HUSON 36, the project has culminated in a fine production 36/600. I ’ve heard of a couple of them in the Richmond ' k f i x SEND 354 FOR NEW '75 CATALOG area that will be skippered by gals this y C " » f f t « season!! The photo shows one o f a pair that is now on duty in the tanks at East RUBBER SCALE PLANS FOR SIX (6) Sharp 3-color FLIGHT-PROVEN, RARE & UNUSUAL Coast boat shows. They certainly per­ W alnut Scale RACING PLANES: CROSBY. FLOYD form well under fan power in a 30 x 40 BEAN. TWO FOLKERTS, SMIRNOFF decals for your m o d e ls ! tank. If you haven’t tried sailing indoors BEARCAT, and CHAMBERMAID. you don’t know what you are missing. Complete set, postpaid, only $4.00 Shirt sleeve and bright lights while the order from: TGPN AGHO CO., inc. snow falls outside!!! CLOUDBUSTER VENTURE P.O. BOX Θ639Β The East Coast 12-meter picture P.O. Box 2921, Livonia, Mich. 48154 S t C H ICA G O , ILL., 6066B should provide you with plenty to think vertised in the spring Quarterly News­ ment, as long as the equipment is work­ about. The boat belongs to the author, letter of the AMYA, the SAIL EN­ ing properly. But it sure is neat to be who put the stripes on 1974’s sails and GINEERING unit is not cheap, however, able to trim out and in under fine con­ set out to purposely produce instructive it plugs directly into your receiver and trol. Inquiries should be directed to pictures. (This is not to say that these so frees a servo for duty as a spare. De­ Sail Engineering, P.O. Box 8439, Rich­ things don’t happen at other times!!!!) ducting the cost o f the servo from the mond, VA. 23226. The most important lesson is found in winch price makes it seem a little less One o f the continuing problems we the main leach. The leach is too loose, painful. I’m tempted to say that this have had in keeping model boating acti­ and excess twist is found in the sail. Com­ unit is not for the beginner, since it vities in the model press is the lack of pare the angles o f the dotted chord lines makes the proper setting o f sails so easy. support from the modelers themselves. which have been drawn in. To cure this, A beginner will never experience the This is especially true among the sailing one should add some backstay tension, wonderful frustration of having his winch types, who seem even more reticent and but tighten the jennys to keep the mast switch jam, or all the other gremlins easily spooked than most. Luckily, head in place. The lower half o f the mast that one runs across. I would say that it among this bed of pansies now and then would then bend forward, with lowers is not necessary to have one to win a tiger-lily blooms. Such is Fred Noesner slackened, and take some o f the fullness races, at the present time. The skipper is o f Union, New jersey. Fred builds and out of the lower body o f the sail. In­ still more important than all his equip­ sails for fun, and says that he is glad creased sheet tension would help in tight-

78 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER ening the leach, and could be set some­ what closer to the centerline o f the boat. A traveler would be a distinct help. The problem is one inherent in the class rules. A 3 inch roach is allowed, yet the bat­ tens are limited to 5 inches. If we agree that the roach measurement should be about 40 percent o f the batten length, we see that 7-1/2 inch battens should be allowed. Alternately, the 5 inch batten could be retained, and a maximum 2 inch roach could be allowed. Considering the general overcanvassing o f the EC/12, the latter might be better from a stabil­ ity viewpoint. Take a ruler and lay it along the jib- stay. Look at the tremendous amount of sag that exists. This is responsible for the extra draft which has crept into the sail. The halyard is too tight and has pulled the draft far forward of the 40 percent optimum location in the upper three sections. A jib traveler, though fitted on this boat, is misadjusted and should be providing more downward pull to remove some o f the twist out o f the jib. The increased backstay men­ tioned in the preceding paragraph would help to remove the jibstay sag and pro­ vide more leach tension in the jib, by pulling up on the jib swivel. Take some quarter or half inch mask­ ing tape, and spray it a dark color. Then attach it to your sails and see if you £N6 210 EAST ORTEGA ST. Λ ^ don’t learn some interesting things. Pho­ SANTA BARBARA, CA 93101 ^ € C (fOUH ko á fy HetoUen. tos are really worth the time, and let you sit back and study your boat free from the distractions of wind and wave. Next month we hope to feature an BETTER interview with AMYA President Bob Harris, and a report on the Colonial T H A N A 50/800 Regatta (this is the new name for the Garden State Regatta.) If every­ • WORKING TURNBUCKLES THIRD • RIGGING & CONTROL CABLE thing proceeds according to plan, you —,· CONTROL HORNS will see a new “ formula” class prototype ?«·* . STRUT FITTINGS HAND! which has been under construction for SHOCK CORD some time in our shop. · COCKPIT TRIM ATTENTION MANUFACTURERS i · · • PULLEYS If you want people to read about your products in MODEL BUILDER, f • INSTRUMENT HOUSINGS you have to take the initiative. Send in Available through your dealer. a product announcement to Bill Nor­ For additional information, brochur· and catalogua tend 0 SIX PROCTOR ENTERPRISES INC. Write for a tree catalog. ______throp for his use, and let me borrow a P.0 BOX 9641 Dept. 21 R unit for testing and photography. Right SAN DIEGO. CA. 92109 10107 Adella Ave., South Gate, CA 90280 DEALER INQUIRIES INVITED now it is MODEL BUILDER that is at­ ΜΓΟΟ. AT 682 1 CONVOY C T . «AN DIEOO CA. tracting new skippers into sailing, and MODEL R/C HELICOPTER DATA CARD you should, if you’ll pardon the expres­ Complete and return to: MODEL BUILDER/CHOPPER CHATTER sion, expose your product within its 1105 Spurgeon Street, Box 4336, pages. If nobody knows about it, you Santa Ana, California 92702 can’t sell it. No column would be complete w ith­ Name: ______Phone:______out a plea for you to join the AMERI­ Address;______Age: ____ CAN MODEL YACHTING ASSOCIA­ TION. Annual dues o f $5.00 are payable R/C Helicopters: Interest only □ Building □ Completed □ to Bud Salika, 3917 Sunnyside Ave., Brookfield, III. 60513.______* * Type model or kit:______

Counter...... Continued from page 7 Areas where help is needed:______tion for R/C, the size for which they are List special skills you might share:______scaled. The nine aircraft plans presently avail­ Remarks: ______—------able include the Grumman F6F-5, Ryan FR-1, Grumman TBF-1C, Grumman

JULY 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 79 Sailing Yachts Fot Radio Control

TAHOE 600

AMYA 36/600 ClASS

LENGTH 3 6 III BEAM 9 '/« In SAIL AREA 6 0 0 sq In $35.95

VALKYRIE HRE CHASSIS K IT ...... $144.95 AMYA 50/800 ClASS The Hallum Racing Enterprises chassis k it is now available and LENGTH 50 In includes: Chassis plate, engine mount, front end assembly, rear BEAM II '/j In $ 74.95 blocks and bearings, Kydex for bumper/radio m ounts/roll bar, SAIL AREA 8 0 0 sq In battery and receiver hangers, steering override, throttle over­ Complete kits include molded plastic ride, flywheel and dutch assembly (12 teeth), integral gear and hull and components, all rigging, finished brake (56 teeth), brake band and liners, front and rear wheels sails and semi-finished wooden parts. and tires, 1/4 inch diameter rear axle, body mounts, wing tubes and mounts, and aerodynamic wing assembly. AH related hard­ TAHOE SAIL SYSTEM $24.95 ware (aircraft quality) included. Front and rear ends fully ad­ VALKYRIE SAIL SYSTEM $33.95 justable. A ll parts available separately. BODY NOT INCLUDED. l i n e Engine m ount available separately ($9.95). Fits Veco, McCoy, n n u and Taipan engines. j j n C Winner of Expert Road Race, 1975 Winter Nationals, San 11715 Adenmoor Ave. Downey, Co. 90241 n n C Jose, California. Calif residents add 6* tax DEALERS WELCOME HRE Inc., P.O. Box 4658, Irvine, California 92664

XF5F-1 "Skyrocket,” Boeing B-17G, A very tempting little morsel from cares to refresh their memory . . . first Lee Mahoney’s “ Sorceress,” Gee Bee the early days o f modeling has now been hand, C.P.M. is producing a kit o f this R -l, Boeing F4B-4, and Curtiss Sparrow recreated by C.P.M. Products, 11054 little gem. In the box, which itself is a Hawk F9C-2. Scales vary from 3/4 to Leolang Ave., Sunland, Calif. 91040. sturdy near-replica o f the original, you 2-1/2 inches to the foot, and spans are How many long-time modelers remem­ will find selected strip wood, printed(!) from 40 to 77-3/4 inches. Price range is ber the “ Pacific Ace,” a 30 inch span sheet stock, real Japanese tissue, landing from $5.50 to $9.50 per set. rubber model formerly produced by Bar­ gear wire, drilled nose block, and hard­ * * * ney Snyder o f Modelcraft? If anyone wood wheels and thrust button. Prop is not included. Carve your own from the block dimensions given, or use a plastic ready-made. K it retails for $4.95 in se­ lected So. California hobby shops, or order direct by adding $1.50 for postage and packing. * * * Custom Craft Products, 19 Florgate Rd., Farmingdale, N.Y. 1 1735 intro­ duced its Miter Sanders at the WRAMS and Toledo trade shows this year. These units are both designed for sanding pre­ cise beveled edges at any angle from 0 to 50 degrees. The smaller model (Stan­ dard, $14.95), will handle materials up to 10-1/2 inches wide and 1-1/2 inches deep, while the larger (Deluxe, $24.95) will handle 14-1/2 by 3 inch material. The latter is especially useful for pre­ cisely sanding dihedral angles into the center section o f built up or foam cored wings. Each sander comes in a simplified kit form, with all parts pre-cut and pre­ drilled. A complete hardware package, along with pre-assembled and pre-lubri- cated slide track unit, is also included. POLIKARPOV l-15bis, from Letectví & Kosmonautika magazine. The Miter Sander is available through

80 WHEN CONTACTING ADVERTISERS, TELL’ ’EM MODEL BUILDER SENT YOU! MODEL BUILDER hobby shops, or direct from Custom Craft Products. * * * GOLDEN AGE ACCESSORIES A complete catalog o f current (ha, SCALE ENGINE KITS SCALE PILOTS SCALE ENGINE KITS ha!) items for electric propulsion sys- temsof model airplanes, is now available for 25 cents from VL Products Division o f Vista Labs, 7023-D Canoga Ave., Canoga Park, CA. 91303. The catalog lists the VL-101 flight system, several field charger and flight battery pack op­ tions, as well as secondary accessory items such as charging plug and cord sets, timer switches, rheostats, test me­ ters, and plans for both a sport and scale 1 % " SCALE I Vi" SCALE P & W ' WASP- WRIGHT J-5 "WHIRLWIND" model that are suitable airframes for the VL power unit. Also listed are other ENGINE CYLINDERS P & W "WASP" AND WRIGHT J-5 model aircraft kits that would work well AVAILABLE IN 1", I '/ j" , & 2" with this system. λ „ SCALE * * * UNIVERSAL AVAILABLE IN Crystal Products, Box 256, Newell, SPORTSMAN ’A" North Carolina 28216, is offering several AVAILABLE IN 1" SMOOTH CONTOUR VINTAGE A lt CRAFT SCALE OO items for the active R/Cer. THROUGH 25/e" SCALE % " THROUGH 5” DIA. The "Field Mate” is a very complete SEND 25c FOR COMPLETE ILLUSTRATED CATALOG field box which comes as a finished unit. Features include: storage compartment H í l U a h s DEPT. MB · 181 PAWNEE STREET for 12-volt motorcycle battery (not fur­ stios: »» SAN MARCOS, CALIFORNIA 92069 nished), optional built-in charger, sup­ plied with amp meter to m onitor plug and battery, three-way terminals for easy starter connection, fold-up foam lined plane caddy, ten drawers to hold small and large spare parts and repair equipment, top compartment for starter, transmitter compartment, holds gallon fuel can, three foot glow plug connector. Price without charger is $65.00, with charger $75.00. Unit can also be sup­ plied with battery, fuel pump, and star­ ter, all hooked up and ready for use. . . . this beautiful Monocoupe by Megow? Write for prices. One of the four most super-detailed plans that Megow ever made. Another Crystal Products item is the We have this, plus many others, print­ "Servo Master.” This unit is handy on ed in clean black line. For catalog, send the home bench and at the field for run­ .50c. refundable with first order. ning 3-wire servos without using your GOLDEN AGE REPRODUCTIONS radio. Operates on 3 pen cell batteries. P. O. Box 13, B raintree, Mass. 02184 Specify your type o f servos. Price is $18.95. Craft-Air, 5901 Oakdale Ave., Wood- tic storage reel. Reel and nylon line are The "Power Check II” is an expanded land Hills, Calif. 91364, has added two white, for good visibility. Craft-Air’s scale volt meter with a built in vibration hi-start glider launching systems to its Hi-Start parachute, along with a steel detector. This unit has an electronic cir­ line o f R/C soaring glider kits and ac- two ring, and steel stake, are also in- cuit which can detect and indicate a drop cessories. Both sets feature one-piece eluded. or interruption o f voltage, from bad lengthsof surgical rubber tubing wrapped The Deluxe Standard Class Hi-Start, connections or whatever. Price is $18.95. * * * on a specially designed, convenient plas- for sailplanes weighing less than 45 oun-

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

S5.00 Annual Fee DeKalb, Illinois 60115 V \1 K r

Name AMA No.

Address Club Affiliation

Town _ State Zip

Phone

JULY 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 81 η the “ Suds City Soar-In," and Old M il­ INTRODUCING waukee will be providing trophies, T- HOOKER \\ n shirts, and posters to help promote the $2.49 ADJUSTABLE BALLAST-LOK event. TOW HOOK $1.95 The contest is open to all R/C glider pilots, and there will be separate classes •STRONG PIANO WIRE HOOK •MOUNT FOR BALLAST for Standard and Open classes. Contact •FLIGHT WEIGHT 5.5 GRAMS •SAFELY HOLDS 16oz 11 Ron Kopp, 8010 W. Waterford Ave., OR MORE Milwaukee, Wise. 53220, (414) 321- •DIECAST ALUMINUM BODIES C l,- 3465 for further info. EASY FIELD ADJUSTMENT HERE, HERE, NORTHEASTERNERS! INCLUDES MOUNTING HARDWARE Ed Whitten, editor and publisher of AVAILABLE AT FINE HOBBY SHOPS EVERYWHERE the excellent “ Star Skippers" news­ A 0 D .3 5 POSTAGE AND HANDLING CA.BES. ADD 6 V. $ALIS TAX i letter for the younger F/F set, is glut- tening for more punishment! In an at­ HARDWARE MANUFACTURING AND ENGINEERING SERVICES AVAILABLE. tempt to get more cooperation among WRITE FOR INFORMATION. clubs in the Northeast, Ed has begun SCOTT RESEARCH CO., P.O. BOX 22, COSTA MESA, CA. 92627 the publishing of another newsletter, "Flashback,” which will feature contest ces (generally those o f less than 100 Wisconsin, on August 2 and 3, 1975. The results and photos, plus comment. inch span), sells for $34.95. The Deluxe other co-sponsor is Old Milwaukee Beer, Ed says, “This is a co-operative ef­ Heavy Duty Hi-Start, for sailplanes a product of the Jos. Schlitz Brewing fort, meaning . . . CD’s send in results, weighing over 35 ounces (generally those Co., which recently went into national completely typed ready to Xerox. Sub­ with 90 inch or more wingspan), sells distribution, after being sold in some scriptions are only available by sending for $37.95. See your dealer, or order th irty states for a number o f years. Ap­ in as many self-addressed and 10 cent direct. · propriately, the contest has been named stamped envelopes as you want. Sub-

Workbench . .. Continued from page 4 Also, the report announced, “ The sec­ ond contest for the Mulvihill Trophy will be held at Dayton, Ohio, on Octo­ ber 3.” (This would be during the 1924 International Air Races.) To the best of our knowledge, these facts have never been published, at least not in any model magazine this editor had read in the past 45 years. O f course, to most readers, this astounding tid-bit is about as exciting as a mashed potato sandwich on fresh enriched white bread, however, one does wonder why the An­ cient Modeling Academy chooses to ig­ nore the Nationals that took place in 1923, 1924, 1 9 2 5 ,1 9 2 6 ,and 1927 . . . Care to take a guess? HURRAY FOR )OE SCHLITZ! For the first time in many years, a major manufacturer will be sponsoring a model meet. Let’s hope it’s the beginning o f a trend. The Milwaukee Flying Electrons, Inc. ‘I do have a positive attitude ...... b u t my will be co-sponsoring their Third Annual Sailplane Contest at Menomonee Falls, rubber doesn’t"

82 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER PEANUT SCALE KITS K ITS ^ PLANS Ο » TH IN G S BOOKS - PLANS ONE SOURCE FOR ALL YOUR RUBBER MODEL SUPPLIES PROPELLERS TISSUE - RUBBER RUBBER LUBE BALSA - BASSWOOD WHEELS - WINDERS NYLON BEARINGS BRUSHES - PIN DOWNS PROP SHAFTS - WASHERS HANNAN CATALOG 25 CENTS DUMMY ENGINE CYLINDERS Peck-Polymers P.O BOX 2498 LA MESA. CALIF. 92041 MANY HARD TO FIND ITEMS

scription runs out with the last envelope. No charge for subs. . . you just do the work o f addressing. Send typed contest results, photos, commentary .. . and those SASE envelopes. . . to Ed Whitten, Box 176, Wall St. Station, N.Y., NY 10005. THINGS TO DO The Fourth Annual International Scale Model Show will be held August 1, 2, 3, 1975 in the Las Vegas Convention Center, South Hall, Las Vegas, Nevada. For further info and entry blanks, con­ tact chairman Phillip T. Henderson, 3841 Syracuse Dr., Las Vegas, Nevada 89121. In addition to 65 classes in the Mod­ el Categories^), there are 68 in Crafts, 73 in Ceramics, and 15 in Photography. The following run-down of free flight yourself there any way you can. Top honors in flying models will be for at the Nationals comes from Hardy Land clearing for a golf course will Sport Scale. Broderson, Executive Director o f the directly benefit free flight flying. An air National Free Flight Society: * * * recon photo, in hand at this writing, Come to the 1975 NATS at Lake shows significant progress toward land The Orange Coast R/C Club, Orange Charles, Louisiana! How do you get clearing in areas which will lengthen on­ County, California (Santa Ana, Costa your models there? Ship them. If I could field flights by at least two minutes in a Mesa, Newport Beach area) will have a do it in 1940, you can do it in 1975 10 to 15 mph breeze, with a total chase Sport and Static Scale contest on August (Wow! That’s thirty-five years!) distance o f 8800 feet at the most favor­ 24, 1975. The Sport Scale event will be Shipping Address is: National Model able angle. in accordance with AMA (Amorous Airplane Meet, Models |Hold for (Indi­ It will take two o f us to replace Pete Modelers Amalgamation) rules, while vidual's Name)],c/o Iowa Stevens, Sotich: Homer Smith and I will be Joint Static Scale models w ill be judged sta­ Calcasieu Parish School Board, Chen- Category Directors. This curious arrange­ tically, but may earn 20 extra points if nault A.F.B. Vocational Bldg. #8, Lake ment is a result of our both having said flown ... proxy fliers allowed ... Charles, Louisiana 70603. “ I will if he won’t,” . . . and he didn’t. Hmmm! Contact Bert Baker (714) 548- Prepay your freight and ship via Air, He, being Floyd Miller, everyone’s first 8500 for more information. Common Carrier Truck or REA. Get choice. Next year, Floyd! * * * NATIONAL SOCIETY OF RADIO CONTROL AEROBATICS Way up in North Idaho, at the Cedar Mountain Sky Ranch, the Second Annual NEW MEMBERSHIP AND RENEWAL FORM Please PRINT Sport Scale Rally will be held on August 17, 1975. The location is 20 miles north Name AMA No. o f Coeur D’Alene. Sponsored by the Intermountain Scale Builders, the rally will be open to all interested individuals, i.e., member­ City ship in Amusing Modelers Annonymous will not be required. This year, in addi­ Competition Classification: A i I B I I c / d n D c / d e CH tion to R/C events, there will also be scale control line and free flight rubber NEW □ RENEWAL□ NSRCA No. and gas (combined) categories. Dues are $4.00 for one year. For further info, contact Bob Petro, Send check or Money Order to: Cedar Mountain Sky Ranch, Route No. NSRCA, c/o Sally Brown, 8534 Huddleston Drive, Cincinnati, Ohio 45236 1, Box93-B, Athol, Idaho 83801.

JULY 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 83 HARBOR TUG "DOUGLAS GREG" COMPLETE FIBREGLASS R/C KIT OF THIS FABULOUS MODEL. BUILT AND DESIGNED BY CLAYTON THOMS. MANY HOURS OF ENJOYMENT IN RUNNING ON ELECTRIC O R S TEA M . FULL DETAILS IN OUR 32 PAGE CATALOG. WITH SEVERAL OTHER TYPES OF R/C BOATS. SEND SI.00 FOR 3RD CLASS. OR $150 FOR 1ST CLASS. CUSTOM HAND MADE DIRECT ONLY BY DWIGHT HARTMAN.

2). % H o jiim n SPECIALIZED FIBREGLASS R/C PRODUCTS SINCE 1962 ARGENTA. ILLINOIS 62501 PHONE 217 . 795-2275

There will be every consideration given to making this a Category I Nats (5 minute maxes), but if wind and site DAV I ES-CHARLTON conditions are the same as last year, it YANKEE will probably be a Category II contest .1 5 RAPIER (three minute maxes). The Category D I C8CL *29.95 PP. Directors will make the determination R/C *35.45 PP. for the events o f the day each morning HOBBY H I0 E A 1 A Y ,0 E L A v AN,III before the start of flying at 8:00 A.M., (309)244-7389 61734 based on the best data available. The objective of this contest manage­ ment is to present each event in its best possible format. The Nats planning meet­ ing gave careful consideration to sched­ New procedures approved at the ule matching with control line events, February Nats Executive Committee to provide good opportunities for those Meeting: Processing for all but FAI competing for Grand Championship FROM THE BOARD OF AMERICAN events (including Indoor) will be at the points. DESIGNER, CHESTER PURDY, WE site on the morning o f the event from The FAI events are given a new for­ ARE PROUD TO OFFER THE NEW, 7:00 A.M. until Noon. Processing for mat this year in an effort to attract more FAI events will be in the hangar the o f the top FAI flyers in the country, THOROUGHBRED RACING MACHINE evening before the event, as previously, and ultimately, to place the Nats FAI FOR THE AMYA 50/ 8OO C IA S S . though · treated in a more thorough­ events on the International FAI calender A 13-lA lb PLANING HULL WITH going fashion this year. (Scale proces­ as an open International event, and DEEP BULB KEEL FOR ULTIMATE sing is directed by the Scale Category thereby attract entrants from other na­ STABILITY AND ACCELERATION. Director). tions. This year’s rounds format follows Non-FAI events will be flown with some of the contest management ideas Hull/Keel/Rudder - $55.00 strict rule-book discipline. We probably being discussed at CIAM Subcommittee will focus on some o f the rough spots, level. A further concern is the problem LEISURE PRODUCTS such as; the Builder o f the Model rule, o f timing the seven second FAI power 692Ο Braddock Road help in starting and launching for jun­ engine run, including the prop run-down. Procedures at the launch site will in­ Annandale, Va. 22003 iors, and unassisted VTO launches. . . in order to get these controversial areas clude; three pair o f assigned engine tim ­ (Dealer Inquiry Invited) sorted out and provide experience for ers to work the whole contest, thus Contest Board action. providing a degree of consistency, with

SOCIETY OF ANTIQUE MODELERS DATE REC'D. MEMBERSHIP APPLICATION NO. I hereby make application for individual membership in the Society of Antique Modelers. DO NOT WRITE IN THIS SPACE

NAME ______BIRTH DATE ______YEARS MODELING

ADDRESS CITY STATE ZIP

Please check if you belong to any of the following: Note: Membership includes 15% discount on one year MODEL BUILDER Magazine subscription. Give S. A. M. No. when subscribing. A. M. A. ______N O .______Enclose Membership Dues of $3.00 and send to: M .E .C . A ______NO______Society of Antique Modelers 1947 Superior Avenue S. A. M. CHAPTER ______NO______Whiting, Indiana 46394 In making this application for membership to the Society of Antique Modelers, I agree to abide by the rules set by the Society and realize that the goals of S. A. M. and the Old Timers movement are to encourage participation above competition and is dedicated to the preservation and reproduction of vintage model aircraft.

______Signed ------84 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER RG'S "P itPak’

• High Efficiency Roll Pump • Transformer Charger • Hot Glo-plug Power • Rugged Construction • 1.33 Gallon Tank • Nicads Included • Tool Caddy • Red, Blue or Green

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P.O. BOX 406 ST. JOSEPH, Ml 49085 Michigan residents add 4% sales tax PHONE (616) 429-3528 two watches on each engine run and the lowest watch taken as the score; spacing o f launch points to prevent the engine noise o f one flight from interfering with another; rotation of launch points for successive flights. These areas are being given study to help make the task of timing the engine run manageable and 1 9 7 4 , less of a farce. C rocket The FAI events will be flown in Replicas rounds as follows: REE FLIGHT Round 1: 6:30 to 8:00 A.M. LTV HARDWARE Round 2: 7:30 to 9:00 A.M. Winding Hooks, Etc. Round 3: 8:30 to 10:00 A.M. Round 4: 9:30 to 11:00 A.M. For complete catalog and FREE $ 5 9 ·9 5 Round 5: 4:30 to 6:00 P.M. Peanut Pilot send $1.00 to: The Round 6: 5:30 to 7:00 P.M. ^ J IM CROCKET REPLICAS ^pvRNSTO RjVff^ Round 7: 6:30 to 8:00 P.M. ' )1 4 4 2 N. Fruit Ave„ Fresno. Ca, 93728 ( F lyoff rounds are flown the following helicopter, and R.O.W. Gas. DAZZLE THE CROWDS WITH A BRILLIANT ARRAY morning in a schedule specified by the NFFS managed, (trophies by NFFS OF DARING AERIAL MANEUVERS* Event Director. or other sponsoring groups): R.O.W. NOW! YOU can own a beautiful Vintage 1930 Fleet Bip/ene

This interruption of rounds during Rubber (Geo. Perryman), Electric, (Mat­ This stand-off scale model was designed for the novice. the heat of the day conforms to the fine meets the critical demands o f the expert. AH balsa, spruce tel only), Electric, (Open, 20 second and p ly construction, with precision cut parts for exact fit- old Southern custom o f the “ Siesta.” engine run), Rubber Helicopter, Rubber Precut. one piece p ly sides, preformed landing gear and cabane struts, complete hardware package, and bolt-on wings. It is also in conformance with discussions Speed, D Gas (Satellite City), and Fly­ at the International FAI levels to avoid ing Wing (trophy by Frank Ehling). FAST and EASY to build. the "therm al" part o f the day so as to A heauty to fly and it performs all the Other groups (Chicago Aeronuts, Cloud- NSPA aerobatic sequences. reduce the likelihood o f excessively long busters, Flightmasters, Miami Indoor Wing span . . . 4 9 " Engine . . *0 flights. group) are presenting various Scale, Pea­ Wing area 760 sq. in. O.A. Length 4 2 " The half hour overlap is novel for nut Scale and Penny Plane events. Look Flying weight . 4-3/4 to 5-1/2 lbs. some, perhaps, but not without prece­ You saw it featured in the May 1975 MODEL BUILDER for further notification. (The Free Flight . . now see it at your dealer or order direct. dent. The extra time allows for the guy Model Aircraft Association o f Southern Send check or money order, plus $1.55 for shipping. in the swamp to wrestle the alligator for California.... FFMAASC.... w ill be Wisconsin residents add 4 % sales tax. Dealer inquiries invited. his model, make the first aid tent, Hot- sponsoring a night flying contest on Phone: (608) 271 0355 Stuff his pylon back in place, and still Wednesday night, managed by Red < _ O N C E P T MODELS ______^ make the next round. Johnson. Chemical lights, as mentioned 2906 GRANDVIEW BLVD MADISON WISCONSIN 53713 Indoor (no alligators here) is in the in MB [page 25, June issue I w ill be on 55 foot Lake Charles Civic Center site. sale at the site, wen) black and gold, and on many airplanes, There is no high ceiling indoor event at Bring your motor bikes, compass and the aluminum cowling, spinner and wheel Houston this year. No rounds for FAI pith helm et. . . see you at the Nats. discs were burnished or damascened. · stick. Homer Smith, AM 398 FAI Team Program Participants may Hardy Brodersen, AM 304 Hannan...... Continued from page 40 fly in the Nats FAI events to qualify for Joint Freeflight FIA, FIB and FIC. Category Directors · ducted, this time indoors, in a former An Indoor FAI Regional Trials will balloon hangar near Versailles. As is usual be flown from 9:00 P.M. to midnight Travel Air.... Continued from page 23 in Peanut events everywhere, the turn­ on Sunday and Monday; six one hour out was notable for the great variety of rounds (These plans are tentative at this pennage, landing gear and wing struts designs, which seems to have a great writing . . . get confirmation from Bud was Travel Air Blue, a color which is deal to do with the appeal of this class. Tenny, Richardson, Texas). best described as a medium blue. The Witness this partial run-down of entries: In addition to a full card o f official wings were aluminum doped, with black Peyret-Taupin, 1909 Cessna, Fokker T ri­ Free Flight events, these are the known letters and numbers, while markings on plane, Pilatus Porter, Farman 231, Leduc unofficial events being offered this year: the fin and rudder were white. Other RL 21, Andreasson bipe, Cougar, Avia NFFS managed: Payload, Cargo, Gas color schemes were red and yellow, or 122, Fokker Eindecker, Pou du Ciel JULY 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 85 see what difference a label makes, but for those of you who do, it may be o f V VINTAGE R/C PUNS y(, interest to note that the Canadian publi­ PIANES WORTH MODELING cation "SPORTS, RECREATION & R/C MODELS WING SPAN PLAN SHEETS PRICE FITNESS,” lists flying model aircraft, B-25H"MITCHELL" 7 1 " I* $ 13.50 including controline (sic), free-flight, " ” PUSTÍC ENGINE COWLS...... PAIR $ 9.00 radio control, rubber, gas, helicopters CONSOLIDATED PBY-5A 'CATALINA” 108" 4 $ I 3 . 5O and seaplanes as, "Sport, recreation for " PUSTÍC ENGINE COWLS...... PAIR $ 9.00 all ages.” " GUN BLISTERS...... PAIR $ 6.00 THE FADING SYNDROME PIPER PA-8 "SKYCYCLE" 60“ 3 $ 10 . 50 John Oldenkamp has been experi­ " " PUSTÍC CANOPY...... EACH $ 8.5 0 menting with aniline dyes for model " " PUSTÍC ENGINE COWL...... EACH $ 7 .5 0 use, and shares the following conclusions SEND 50 CENTS FOR CATALOG TODAY ! ! ADD $ 1 .0 0 POSTAGE PER P U N with us: DISTRIBUTED IN CANADA- DEALERS & DISTRIBUTORS WRITE- "The only sunfast colors are those R&M SALES, IO 27 C U R K E SID E ROAD, S ID MORGAN, I 3I 57 ORMOND LONDON,ONTARIO,N5Z 3B1 BELLEVILLE,MICH. 48111 that dissolve in water. The alcohol- soluble ones fade in a matter o f weeks. The most stable dyes around right now seem to be the ones used in the various Magic Marker spray cans. I have one ARE PEANUTS YOUR BAG?? handlaunch wing and a rubber job that I deliberately hung in a full-sun window WALT MOONEY OFFERS TWO OF ’EM NOW! for over six months, and they have faded not one-percent. “ The most visible colors in flight are - PLANS B A G * I PLANS BAG * 2 the dark, saturated ones, like cobalt blue, , 14 PEANUTS PLUS 2 OTHERS 14 PEANUTS PLUS STAHLWERK ultramarine, violet (purple), etc. The ORD-HUME OH7 · FOKKER V-23 VP-2 · S.E.5 .MICROPLANO VELOZ lighter reds and yellows are mostly use­ MEYERS O.T.W. · LA IR D LC -O E FORD FLIVVER · SPEED SPITFIRE less for visibility in the air, so I usually PHALZ PHOKKER · SLINGSBY DART MILES M-5 SFARROWHAWK . DH-6 spray the wing bottom surfaces the dark PIPER VAGABOND · GEE BEE D WACO SRE · RENARD R-17 color, then put yellow or red on the PILATUS PORTER· ANOREASON BA-4B BUCKER JUNGMANN · CULVER DAR T DH-6 · DRUINE TURBULENT WITTMAN'S VW POWERED RACER upper, so they are easier to find after HUNTINGTON H-12 · MISTER MULLIGAN STAHLWERK MK R IIIB · MONOCOUPE 110 D/T-ing. PIPER PAWNEE ANO PIPER COLT FOSTER WICKNER WICO GM-I · / "These Magic Marker sprays can be put over paper or wood, but a thin coat ONLY *5.00 EACH (POSTPAID) FROM: WALT MOONEY of Flo-Cote should be applied first. Un­ 2912 CABRILLO MESA, SAN DIEGO, CA. · 92123 U.S.A. fortunately, it is very d ifficu lt to brush over the spray dye, so the second coat (Flying Flea), Nieuport 11, Dornier 335 SPORT OR HOBBY? should be applied by spray. I usually (the pusher-puller job), Focke-Wulfe Frankly, we’ve never been able to use Aerogloss clear spray, but since it 190D, Waterman Racer, Aeronca, Piper Cub, Volksplane, Potez 60, and even a OPEN CLASS Mirage F1 fighter, featuring a pusher prop at the jet orifice! PLACE NAME AIRCRAFT SCALE PTS. WEIGHT BEST TIM E GR OZ. Evidently, the concours was well 1. J. Kamla Peck Cougar 14 11.9 .420 36.0 received by all, as another meet is sched­ 2. P. Paterson Peck Cougar 12.4 .437 35.0 uled for November in Paris, according to 1 1 Guy Cognet, writing in LE MODELE 3. J. Morgan Vagabond 5 9.8 .346 38.5 REDUIT D’AVION magazine. 4. G. King Vagabond 11 11.5 .406 25.4 5. G. King Miles M-5 14 11.6 .409 36.5 AND SPEAKING OF CONTESTS We note what we consider a healthy JUNIOR CLASS trend toward more complete reports. 1. G. Lindsey Peck Andreason 9 17.7 .624 24.2 Contest Director Pete Paterson, o f the 2. S. Zopfi Peck Cub 10 13.6 .480 19.5 Boeing Hawks, included not only a com­ 3. J. Tinoco Ord Hume -4 18.9 .687 24.3 plete list o f entrants, and names of their aircraft, but also scale points, flight times, and model weights, presented in MOVING? SEND NOTIFICATION FIRST! both grams and decimal ounces. With NAME such information, one can draw more OLD meaningful conclusions, than simply the ADDRESS ADDRESS usual list of winner’s names, which mean little except to the winners themselves. (Please Print) CITY STATE ZIP We heartily encourage such reports, NAME which can contribute a great deal to­ NEW ward improvement o f the art/science of ADDRESS ADDRESS aeromodeling. Since this particular meet was conducted indoors, under a 35 foot (Please Print) CITY STATE ZIP plus ceiling (but hampered by a hanging Change of address notices must be received one month before date of issue that new room-divider), the following table makes address takes effect Send old address with new; old label preferred. Post Office will not for interesting conjecture. Note that forward copies unless you pay extra postage. Duplicate issues cannot be sent. weight alone is not the deciding factor: The MODEL BUILDER, 1105 Spurgeon, Box 4336, Santa Ana, Ca. 92702 See contest results, above, next column:

86 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER CLASSIFIED ADS INDEX TO ADVERTISERS Noncommercial: Rate is 25 cents per word with a minimum of S3.00 worth. Commercial: Rate is 40 cents per word with a minimum of $5.00 worth. No Ace R/C, Inc...... 59 mail-order discount house ads knowingly accepted. A irtro n ic s ...... 69 All ads are payable in advance and may be for any consecutive insertion period American Balsa Corp...... 73 specified. Name and address free. Send ad and payment to: The MODEL BUILDER. Astro Flight, Inc...... 72 Classified Ads. 1105 Spurgeon. Box 4336. Santa Ana, California 92702 Cannon Electronics...... 61 Carr Saits...... 78 HI-FLY ENTERPRISES CONDOR "800." R/C RACE CARS AND ACCESSORIES B-C-D free flight, 3 Contest H /L gliders, CATALOG. 1/8 scale U.S. Nationals Cham­ Century 2 1 ...... 75 NEW for "75"; Sparrowhawk, for unlimited pion. Delta Manufacturing, Box 27, Lorimor, Cloudbuster V e n tu re ...... 78 rubber, flown by Bob White. FREE catalog. Iowa 50149, (515) 763-2220. Concept M odels...... 85 Hobby Fair, 7212 Vassar Ave., Canoga Park, Jim Crocket Replicas...... 85 California 91303. PRIVATE COLLECTION SALE: Berkeley, Cleveland, Comet, etc. kits. S.A.S.E. plus Dumas Products, Inc...... 3rd Cover 25 cents brings list. Thomas F. Brownawell, ORIGINAL AND CLASSIC PEANUT, Sport, Flyline Models ...... 78 and Scale rubber plans. Send S.A.S.E. for R.D. 3, Harrisburg, PA. 17112. list of 76 plans, or $ 1 .00 for list and sample Carl Goldberg Models...... 1 plan. Fallston Plans Service, Box 133, OLDTIMER PLANES: Sale/trade. Beautiful­ Golden Age Reproductions...... 81 ly built. R/C version. Super Buc., Trenton Phoenix, Maryland 21131. W.C. Hannan...... 83 Terror, New Ruler, Cleveland Stinson 84", FIBERGLASS SPEED TOPS: A-FAI (Up­ Buc C Special, Corbin Ace 74". Plus others. Hartman Fiberglass R / C ...... 84 right and Sidewinder), B. $8.00 each plus I need ign. engines for active old time flyers. Heath Co...... 2 postage. More information. Charles Lieber, Stop in or call (717) 235-2664. The Hobby Hobby H id ea w a y ...... 84 Shop, Market Square S/C, Shrewsbury, PA. 725 Signal Light Rd., Moorestown, N.J. Hobbypoxy Products...... 84 08057. 17361. HRE, Inc...... 80 CLOTH OF KINGS: SILK for model cover­ PLASTIC SYRINGES, for fuel, glue, etc., JCM Specialties...... 83 several sizes. Send self-addressed stamped, ing . . . 45" width. Finest import. Any length. Jef's Friends...... 82 White only . .. $4.00 per yd. A.C.C., 3229 envelope. OMNICO, Box 3, Macomb, III., Dianora Dr., Palos Verdes Peninsula, Calif. 61455. Kavan Model Aircraft, Inc...... 71 90274. K8tB Mfg...... 58 Model airplane plans. Peanut, rubber, C O j, Kelly Products, Inc...... 56 AIR RACER SCALE PLANS. Super-detailed, gas. Free list. Send self addressed, stamped full construction with historic technical data envelope to: Modernistic Models. Box 6932 Kraft Systems, Inc...... 2nd Cover plans in 3 /4 " and 1" scales. Price list — 25i . Burbank, California 91510. Kusik Engines...... 56 HALL ENTERPRISES, P.O. Box 485, Win­ Leisure Products ...... 84 ter Park, FL 32789. Speed Equipment: Cars, R/C, planes, boats, Hop-up, chrome, ultrasonic cleaners. SASE Marlow Engineering...... 81 GEORGE ALDRICH custom fitted engines plus 50of. Franny's Chrome, 513 Vesta Place, Model Builder B in d e rs ...... 62 for satisfaction and top performance in R/C, Reading. Pennsylvania 19605. Model Builder/Panavise Contest...... 63 U-Control, and Free Flight. Send S.A.S.E. for price list and information on new M AG­ SAILPLANE DESIGNER'S HANDBOOK: Model Builder Products...... 5th Cover NUM fuels. 3219 Shady Springs, San An­ Design instructions, 180 airfoils, 63 designs, Model Rectifier Corp. (MRC). . . 8th Cover tonio, Texas 78230. 3rd printing, $4,96. Eric Lister, 953 Klock- Model Specialties...... 72 ner Rd., Trenton, N.J. 08619. TISSUE PAPER for Rubber Scale Planes. Walt Mooney Peanuts ...... 86 20 by 30 inch sheets, 10d per sheet. Stamp­ 1936 - JIMMIE ALLEN "THUNDER­ Sid Morgan (Vintage P la n s )...... 86 ed envelope brings free sample of all 19 col­ BOLT": A few original complete kits while M&S Ltd...... 77 ors. Bill Wilson, P.O. Drawer U, Kountze, they last — $6.95 pp. Bryan Wheeler, 7604 Nelson Model Products...... 56, 75 Texas 77625. Appleton, Raytown, MO 64138. Bud Nosen M o d e ls ...... 68 Pana-Vise...... 76 John Pond O.T...... 68 is not plasticised, care must be taken. PEANUTS DOWN UNDER Proctor Enterprises...... 79 “ Thus, I use one coat Flo-Cote, one The Australian magazine “ AIR ­ Pro-Line Electronics, Inc...... 57 coat Magic Marker spray, one coat BORNE & R/C MODELS," volume 2, Raceplanes...... 66 sprayed Aerogloss, then two or three No. 1, features an article and a full-size R/C Buyers G uide...... 73 coats o f Flo-Cote. Sanding has to be Peanut plan, by B.H. Kennewell. We REMCO ...... 66 done g in g e r ly (Flo-Cote is a high qual­ pulled a few items out of context, which R ev-U p ...... 74 ity nitrate dope formulated specifically seemed pertinent: for modeling by CPM Products, 11054 RG's R /C ...... 85 “ Some o f the reasons for the con­ LeolangAve.,Sunland, CA. 91040. wen) Rocket City Specialties...... 70 tinued existence of Peanut Scale are: RS S y s te m s ...... 7th Cover PUT YOURSELF IN YOUR MODEL “ a. It is inexpensive. Ifone is building Satellite C ity ...... 69 Don Typond sent in the accompany­ from plans, then $5.00 will buy just Scott Research ...... 82 ing photograph, showing his three- about everything necessary for a couple Sig Mfg. Co...... 6th Cover dimensional “ self-portrait,” to be in­ of aircraft. Soarcraft Products...... 4th Cover stalled in his R/C glider. It was created “ b. The working area can be small. I Sonic-Tronics, Inc...... 76 as follows: A Williams Brothers sports­ build all my models on a piece o f 1/2 Sterling Models, Inc...... 64, 65 man pilot was used as the basis, and al­ inch plywood about eighteen inches wide Su-Pr-Line Products, Inc...... 75 terations were made using a tube o f plas­ by thirty inches long, which sits on the S.C. M odeler...... 77 tic model putty. The eyeglasses are ace­ kitchen table. All my tools and suchlike Tern A e r o ...... 78 tate with gold-painted rims, while the are kept in a small wooden box, while Top Flite Models, Inc...... 67 shoulder straps are modified shoe-laces balsa and tissue is stored behind the side­ Tyro Model & Supply...... 66 with card stock buckles. The ripcord is board! Small parts and fittings reside in VL Products...... 60 fine iron wire wrapped around a core an empty shoe box. Victor Model Products...... 80 o f heavier wire. The “ hair” texture was “c. The completed aircraft are both Vintage Aero ...... 72 achieved by brushing putty with a stiff easy to store and transport. A t the mo­ Vortex Model Engineering...... 79 bristled brush before it hardens. Don ment I have two sitting on the sideboard Peter Westburg ...... 72 adds: “ Yes, I’ve heard all the comments and the back seat of the car will hold Williams Bros...... 81 about voodoo. Has anybody got a pin? several when driving to the flying site. Richard Zasadney...... 68 . . . What’ll happen to me if the model “ d. Peanuts, and any rubber powered crashes?. . . etc.” models are clean. No worries about fuel

JULY 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 87 FULL-SIZE PLANS No. 5753 G REM LIN S2.75 STICK 'EM PATTERNS Sharp little Half-A C/L Stunt model. Will "Stick 'em Pattern" numbers correspond to SERVICE do complete schedule. By Tom Dixon. (with instructions) plan numbers. Order with plans and they'll No. 575-O.T. MERCURY S4.00 be mailed together . . 3rd Class. Add 504 per set to mail patterns 1st Class. No. 7751 LITTLE BOMB S2.50 Designed by Ben Shereshaw, kitted by Minimum area 1/2A pylon racer for two Scientific. 72" span. 8y Phil Bernhardt. CALIFORNIA RESIDENTS ADD 6% TAX. channel radio. By Wm. R. Nielsen, Jr. No. 4751 R/C AUTOGYRO S3.50 No. 775-O.T.SP BOMBSHELL S3.25 No. 575-O.T.SP MERCURY $3.25 No. 7752 THE ALIEN S2.50 Semi-scale twin rotor R/C autogyro for No. 11743 SP "C-QUELL" 53.95 Pendulum controlled flying wing pusher .35 engines. Very stable. By Skip Ruff. No. 1174-O.T. SP LANZO STICK $1.95 for Brown CO power. Daniel Walton. 2 No. 4752 OKIE BIRD S3.50 No. 91074-O.T.SP BUHL PUP 54.95 No. 7753 ULTRA DART S2.00 Red hot Class A/B free flight. Plans show No. 8741SP WOODY PUSHER $1.95 Monster 39" span Delta Dart for sport sub fin and rear fin types. By Jim Clem. No. 874-O.T.SP POWERHOUSE $3.95 and Unlimited Rubber. Dave Linstrum. No. 7741SP CURTISS A/12 SHRIKE $3.95 No. 475-O.T. G.H.Q. SPORTSTER S4.00 No. 774-O.T.SP OUT Ό SIGHT $2.45 No. 775-O.T. BOMBSHELL S4.00 From July 1936 M .A.N., also kitted by No. 6741SP TRIXTER BEAM $2.95 Famous winner of Class C gas at the '40 G.H.Q. By Louis Loutrel. Phil Bernhardt. No. 674-O.T.SP RED ZEPHYR $3.95 Nats, by Joe Konefes. Phil Bernhardt. No. 3751 CURTISS F9C-2 S6.00 No. 12711SP CURTISS WRIGHT Jr. $3.95 Navy airship-based "Sparrow Hawk" bi­ No. 574 O.T.SP T O COUPE $2.95 No. 6751 SQUARE HARE R/C S3.00 plane, 1-1/2" scale C/L. Charlie Smith. No. 11731SP BIG JOHN the FIRST $5.95 All sheet balsa trainer with long history. No. 3752 CALL-AIR SNOWCAR S2.50 Watch this space for more patterns to come Span 52", .19 power. By Bill Northrop. Radio controlled, semi-scale prop-driven No. 6752 SKYFARER S2.75 snow car. .30 .40 engines. Fred Sanford. No. 275-O.T. MYSTERY MAN $5.00 Rubber powered 1" scale model of trike No. 3753 GROOVY TUNA S2.50 Famous Elbert Weathers Class C gas job. geared high wing cabin. By Earl Stahl. Top-notch Wakefield design from 1973- Used takeoff dolly. By Phil Bernhardt. 1975 FAI U.S. team member. Jon Davis. No. 675-O.T. DIAMOND DEMON $2.50 Popular .020 Replica of Bay Ridge cabin No. 375-O.T. 1936 WAKE WINNER S2.00 Price includes 3rd Class postage and reprint Cl. B job. Span 34". By Phil Bernhardt. Englishman Albert A. Judge's Wakefield of building instructions (if any). Add 454 Cup design. Redrawn by Phil Bernhardt. PER PLAN for 1st Class postage. Add 504 No. 6753 SHRIKE S3.00 for overseas orders (except APO's). Hot Half-A free flight, with good looks, No. 2751 TOP SLIDER S3.50 R/C Slope Racing glider. Wilt sport fly in and top performance. Bill Langenberg. Send self-addressed, stamped business size light winds without ballast. Ken Willard. envelope for free copy of complete plans list. No. 5751 FLEET BIPLANE S4.00 No. 2752 CUT-LESS S2.50 CALIFORNIA RESIDENTS ADD 6% TA X. Fast-building 2" Sport Scale R/C model Half-A R/C Pylon Racer for 2 ch. radio. of famous 1930 bipe. By Romey Bukolt. Elevator and aileron. By Dave Katagiri. SEND TO: No. 5752 SEA FURY $3.00 No. 2753 FORD TRI-MOTOR S2.00 MODEL BUILDER PLANS SERVICE Semi-scale model of WW II British fight­ Super-light rubber scale model of famous 1105 SPURGEON. BOX 4336, er, for 1/2A R/C pylon. Jerry Holcomb. Tin Goose. 32%" span. By Tex Newman SANTA ANA, CALIFORNIA 92702 spillage or wiping greasy exhaust deposits The problem, however, is that the parti­ ture Aerobatic Biplane Association ... away. No fuel proofing worries either. cular type of fabric has long been out of MABA. This move, o f course, solidifies About the only messy thing is rubber production. Extensive searches o f rum­ the members’ desire to keep the biplane lubrication and that wipes o ff one’s mage sales have failed to yield the proper as the primary aircraft used in all com­ hands with a moist cloth. samples to be used for experimental petition under the rules, a move with “ e. Rubber models are QUIET. That purposes. (Perhaps the Poynter Sisters which we heartily agree. is an ever increasing point o f importance bought up all those old garbs?). At any In recent months, there were quite a these days, especially to the person who rate, if any reader knows the where­ few modelers interested in expanding the cannot get out o f the city area to fly. abouts of such material, we’d be happy former NSPA into all types o f scale or With Peanuts, one can fly in the local to put him in touch with Ralph. scale-like aircraft, provided the proto­ park without worrying anyone. PARTING SHOTS DEPT. type had stunting capabilities... and “ So you can see that to a person on Keith Donaldson, submitted the fo l­ whether or not it had two wings. Like a limited budget, and with a limited lowing gems, abstracted from the pages the modeler whose mother-in-law drove working area, Peanut Scale is one way of THE CURTISS STANDARD JN4-D o ff a c liff in the car that had all o f his to be involved in aeromodelling.” MILITARY TRACTOR HAND BOOK, models and radios in the trunk, we So there you have it, the "kangaroo 1918, which is available in reprint form viewed this with mixed emotions (apol­ view.” from: Aviation Publications, P.O. Box ogies to model-minded M .I.L.’s). While 123, Milwaukee, Wisconsin 53201. Price “ CELANESE D /T ’S?” we lean strongly toward the come one- is believed to be about $3.00, but it Ralph Scott, o f Sacramento, Califor­ come all side, we feel just as strongly might be best to inquire: nia, has an interesting idea for a light­ for the biplane side . . . and anyone who “ Avoid that destructive disease known weight and simple D/T device, which has known this editor since he began as ‘tinkeritis;’ when the motor is work­ involves no fire hazards. During his work R/Cing over 20 years ago, is well aware ing satisfactorily, leave it alone.” at drycleaning plants during the 30’s, o f this feeling. “ Never forget that the engine may Ralph became aware o f the fact that Anyway, we totally agree with MABA stop, and at all times keep this in mind early synthetic fabrics were inclined to newsletter editor Floyd in one respect and plan on a safe landing place within dissolve when exposed to certain clean­ . . . all clubs holding MABA contests gliding distance of wherever you may ing solvents. In particular, Du Pont’s should strive to follow the MABA rules. be . ” ______· “ Celanese" fabric, made up in both This is the only way (and now we don monofilament and spun yarns, would Remotely .... Continued from page 13 our R/C Contest Board Chmn’scap) the be particularly subject to such action. National Sport Pattern Association, ca­ rules can be properly tested in order to Ralph feels that a short strip o f this pably edited by Floyd Lawrence, Wil- find out what needs to be done to im­ material, tensioned with a rubber band iowick, Ohio, indicates that it is no long­ prove them . . . if necessary. Try ’em ac­ could provide the key to extremely sim­ er the N.S.P.A.! A recent vole of the cording to the book first, then, if you ple D/T triggers for hand-launched glid­ membership was just completed, in want to suggest some variations, at least ers. Different strength solvents could be which the decision was made to change they will come from first hand exper­ used, in order to adjust reaction time. the name o f the organization to Minia­ ience, rather than conjecture only. ·

88 MODEL BUILDER PICK A MODERN WINNER TRY λ COMPETITION PROVEN C-L STUNTER Designed by MIKE GRETZ SIG MUSTANG STUNTER KIT CL-21 SPEEDY CONSTRUCTION! WITH MOLDED PARTS AND FOAM WING CORE KIT FEATURES: Precision Cut Foam Wing Formed Plastic Fuselage Top Molded Plastic Fuselage Scoop Molded Plastic Cowling Clear Bubble Canopy with Framing Handy Printed Fuselage Sides Build Directly On The Wood ENGINES: .29 - .40 Heavy Duty Nylon Bellcrank WING SPAN: 50 in. Colorful Decals WING AREA: 480 sq. in Formed Torsion-Bar Landing Gear WEIGHT: 41 oz. Cut Balsa and Plywood Illustrated Instructions HARDWARE PACK INCLUDES *20 .95 Molded Hinges Molded Nylon Control Horns Silver Soldered, Plated Flap Horn SUPER CHIPMUNK

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

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

KIT CL-16

Formed Plastic Engine Cowling Molded Plastic Canopy Formed Torsion Bar Landing Gear Lead-out Wire Heavy-Duty Bellcrank Plated Flap Horn Hardware Pack Decals for Scale Markings ENGINES: .29 - .40 Full Size Plans WING SPAN: 51 in. Isometric Views and Instructions WING AREA: 550 sq. in Die-Cut SIG Balsa and Plywood *20.95 Nylon Elevator Horn

See your dealer first. To order direct add $1.00 postage in the U.S., $1.50 in Canada. No C.O.D. orders. SIG MANUFACTURING CO., INC. . . Montezuma, Iowa 50171 IN THE BEST CIRCLES, IT’S fib er skiver

A PRECISION INSTRUMENT FOR THE DISCRIMINATING MODELER

Safe, Rear Draw-Bar Clutch Available in seven anodized handle colors: silver, blue, red, green, gold, copper, violet. Precision, Instrument-Quality Materials Complete set in fitted hardwood case; includes Strong-Holding Advanced Collet Design uber Skiver, together with two vials containing Non-Rolling Hex Cross-Section six No. 11, six No. 15, one No. 12, and one No. 20 . . . A total of 14 blades S10.50 Deeply Knurled, Non-Slip Grip Individual handles (specify color) $3.95 Long-Life, Stainless, Vial of 6 blades (No. 10, 11. 12, 15, Surgical Steel Blades or 20) $1.80 20 £ See your dealer, or order direct. Dealer Inquiries are invited. MODEL BUILDER PRODUCTS All direct orders sent postpaid in U.S. California residents add 6% sales tax. 1105 Spurgeon, Box 4336, Santa Ana, California 92702 Meet Our New A rriv a l

The new RS?0 is exactly what you want a two channel radio to be. It comes in a very compact case featuring a unique open gimbal that is completely sealed from the internal electronics Rechargeable batteries are provided for both the transmitter and receiver at no additional cost Utilizing the RS4 servos with heavy duty gears in an all new configuration, the RS20 delivers the same high performance that other RS units are so well known for small size, light weight, equipped the right way. and performance. Four sound reasons why, when you check the price, it becomes the outstanding value for 1975.

$ 1 6 9.9 5 RS Systems Special Intioductory Price 860 West B< irk ley Orange California 92667 (/M) 639 /26I A better three channel could only have been made MRC by one company . . . and 763 we

Prior to MRC's “763" three channel radios were an exercise in engineering trade-off. Cost saving features were usually substituted for design advantages. After all, everyone knew that to sell, a three channel radio had to be economical, not advanced . . . budget came before betterment. MRC's 7 6 3 has changed all that. Here, 3-wire, discrete servos and a double tuned front end receiver replace the cheaper beginner's type brick construction. Separate receiver and servo mounting capability allows proper cushion­ ing for the receiver, with servos placed where you think they belong, not in one spot as dictated by the Note: Separate servi Separate receiver— brick. In addition our best 7 6 series dual axis Mono­ Not A Brick. ball bearing control stick (with adjustable length feature) is included for smooth control and logical response. Built-in too, is the quality, range and performance ^ ^ ^ th a t have made MRC's Mark V a standard of re­ liability. So consistent is the response in the 763 that the fear of flyaways are eliminated. Whether you use it for airplane, glider, boat or car, you can depend on its un­ compromising performance. In effect, the 763 provides competition features at a 3-channel price. A system without competition, a design without compromise Compatible with five different types of MRC servos: high power, high speed, 763 Three-channel system complete with two dis retract, extra compact, waterproof. . . . crete servos, separate receiver, battery boxes, monoball bearing control stick, control lever $159.95 MODEL RECTIFIER CORPORATION · 2500 WOODBRIDGE AVENUE · EDISON, NEW JERSEY 08817