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. WRITE FOR FREE CATALOG "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 HATW ILL... * Bond bolso in seconds * Bond balso to nylon, brass * Reduce building time by 5 * Moke field repairs faster t you can find the pieces REG. SIZE Pkg $3.45 Net Wt 7.0grams BUYERS COMPARE ©EVCOIM — $1.00 per gram p O T S T U F F - .66 per gram* ZAP 1/4 oz. - .49 per gram GIANT SIZE ZAP 1/2 oz. - .42 per gram Average net product weight Pkg $5.95 ganeet the requirements of the meral Trade Commission ZAP Net Wt 14.1 grams Ijiesive is labeled as to its net tiid ounce or gram contents and ‘ Package contains adhesive. r - 12446 Polmtog Drive Soratoga,CA-95070 DEALER AND DISTRIBUTOR INQUIRIES INVITED.m Standard Discounts Available CARL GOLDBERG CG QUALITY ACCESSORIES Φ ONEW For The Best in Flying 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 ............................................................................................