MODEL BUILDER MAY 1980 FULL SIZE PLANS AVAILABLE - SEE PAGE 108 15 Least 20 Grains Per Inch

MO BUI volume 10, number 100 ISSN 0194 7079 • CURTISS F6C-1 Eugene Martin's 2 " R/C Scale Classic • GOLDEN EAGLE New Std. Class Sailplane by Tom Williams • SKYROCKET - 1940 O.T. By Larry Eisinger • F.A.C. TRAINER F/F Sport Rubber by Frank Scott The i h Radio co of Whttt makes the Ι -series so unique' Full programming. Modular AM and FM queue) boards. ATV. Direct Servo Con trol. Dual rates dnd mixing circuitry. Human engineered controls of uncommon quality and precision. And the meticulous hand rails mans hip that has made us famous. Tl»c acutpenbe U N 2ft p ^risciti^ l»uwt*tii 4. 5. 6 and S channel models, plus the 5JH/h Inside and out the Futaba "Supcmtlios helicopter and the are built for !he most critical radio control 6JB/be.<; version* enthusiasts sc»s«>».· And now the . the reliability, and technical wizardry/ "“« j new S124 servo, with to match the most demanding and skillful pat dual ball bearings and tern flyers!' noted Mode! AirpUmt .Virus. coreless high torque/high speed motor, is Fixing Models found the component available as a J-series option. assembly and circuit board layout "truly Closely examine the J-senes at your RC excellent" specialist. Isn't your model worthy of a Futaba? Futaba / ulaba t orporatioa of A mtrica 555 Hr« tVi m naStrrtt/C<>mpcim/CA <*>220 L B A T T (% CHECK ö -® THINK TWICE m I B The best Glow Plug and the best Fuel go together like a horse and carriage. You can’t get the best out of either without the other. For both — THINK K&B and be assured of consistent peak performance. K&B Glow Plugs with patented blow-out proof seals have proven their consistent performance over the years, and K&B FUEL is the fuel that has brought home more winners at the NATS and other prominent meets than any other fuel. KB-IL KB-IS (long reach) (short reach) K&B GIVES GLOW PLUGS YOU A CHOICE The KB-IL and KB-IS Glow Plugs fea OF 7 FUELS ture a special platinum alloy wire — superior to that used in any other glow K&B MODEL ENGINE FUEL plug — that makes them more capable with X2C OIL of withstanding the fierce heat of to K&B 100+ for Free Flight, U-Con- day's "Hot” fuels. trol and R/C Flying K&B 500 for R/C Flying & R/C Race Cars — where both high and low speeds are required K&B K&B 1000+ for VaA Engines K&B SUPER SPEED for going "all GLOW PLUGS out” K&B MODEL ENGINE FUEL with Idle Bar with CASTOR OIL The "Idle Bar" Glow Plugs, long or K&B 100 for Free Flight, U-Control short reach, are the result of a con and R/C Flying cept first developed by K&B many K&B 1000 for y2A Engines years ago. They are a "must" where K&B F.A.I. 80/20 for Pylon, Free control from a low idle to a constant Flight and U-Control Speed — no maximum r.p.m. is required at a given Nitro. Qualifies for F.A.I. rules speed. K&B Fuel is consistent trom can to K&B Glow Plugs continuous demand can and year after year . the speaks lor itself. quality is always there. K&B MANUFACTURING 12152 WOODRUFF AVE., DOWNEY, CA. 90241 MAY 1980 volume 10, number 100 621 West Nineteent h S t, Costa Mesa, California 92627 Phone: (714) 645-8830 STAFF PUBLISHER CONTENTS Walter L. Schroder EDITOR FEATURES Wm. C. Northrop, Jr. W O R K B E N C H , Bill Northrop....................................................................... 6 GENERAL MANAGER Walter L. Schroder “. .T H R E E IF B Y A I R ,” Letters to the Editor...................................... 7 ASSISTANT EDITOR O V E R T H E C O U N T E R , Phil Bernhardt .............................................. 8 Phil Bernhardt T H E F L IG H T IN S T R U C T O R , Dave Brown...................................... 11 ASSISTANT GENERAL MANAGER R / C W O R L D , Bill Northrop ......................................................................... 12 Anita Northrop ” 1 TO 1” R/C SCALE, Bob Underwood.............................................. 22 ART DEPARTMENT H O W T O F L Y P A T T E R N , Dick Hanson.............................................. 24 Chuck Blackburn Al Patterson F U E L L IN E S , Henry Nelson............................................................................. 25 OFFICE STAFF F A I S O A R IN G , Dave Thornburg.............................................................. 26 Mary Ann Bell T R Y A N R / C G L ID E R P O S T A L , Ken Cashion ........................... 28 Edie Downs R / C S O A R IN G , Dr. Larry Fogel................................................................ 29 Debbee Holobaugh Pat Patton P L U G S P A R K S , lohn Pond ......................................................................... 36 A. Valcarsel H A L F -A S C E N E , Larry Renger .................................................................. 42 CONTRIBUTING EDITORS E L E C T R IC P O W E R , Mitch Poling............................................................ 44 Dave Brown Mitch Poling R / C H E L IC O P T E R IN V E R T E D F L IG H T , Mike Mas............. 46 Otto Bernhardt John Pond Jerry Dunlap Fernando Ramos M O DIFYIN G THE CO X CUB, Larry Renger............................... 47 Larry Fogel Larry Renger R / C P O W E R B O A T S , Jerry Dunlap..................................................... 48 Chuck Hallum Dan Rutherford Bill Hannan Tom Hutchinson C L U B S : H O W T O H A V E A G R E A T O N E , George Wilson 50 Joe Klause Dave Thornburg C O N T R O L L IN E , Dan Rutherford.......................................................... 52 Walt Mooney John Tucker Bob Underwood H A N N A N ’S H A N G A R , Bill Hannan..................................................... 54 F R EE F L IG H T , Tom Hutchinson ................................................................ 58 ADVERTISING MANAGER F R EE F L IG H T S C A L E , Fernando Ramos............................................... 62 Walter L. Schroder SCALE VIEWS CURTISS P-1B, Peter Westburg...................................................................... 20 R/C MODEL BUILDER (ISSN 004 7079) is published monthly by RCMB INC., 621 West Nineteenth Street, Costa Mesa, Cali fornia 92627. Phone (714) 645-8830. CONSTRUCTION Subscriptions $20.00 per year, $37.00 for two years. Single copies $2.00. Add $3.50 per CURTISS HAWK F6C-1, Eugene Martin....................................................... 14 year for postage outside the U.S. (except GOLDEN EAGLE, Tom Williams..................................................................... 32 APO and FPO). SKYROCKET O.T., Larry Eisinger....................................................................41 Copyright 1980 by RCMB INC. All rights reserved. Reproduction without permission PEANUT STEARMAN 4E, Tom Cadogan ..................................................... 55 prohibited. F.A.C. TRAINER, Frank Scott.......................................................................... 63 Change of address notices must be received six weeks before date of issue that new address takes effect. Send old address with new; old label preferred. Post Office will Cover: Lori Fragola, Lakewood, California, and Ron Sivils' "Magnum 12" sailplane, not forward copies unless you pay extra built from a Soarcraft kit by Mark Berg, make an eye-catching couple for this 35mm postage. Duplicate issues cannot be sent. transparency taken by photographer John Craney. The scene is "somewhere along the Southern California Pacific Coast". Second class postage paid at Costa Mesa, California, and additional offices. 2 R/C MODEL BUILDER COMPLETELY READY TO FLY Ideal for beginning flyers, the Breeze is designed for the mod eler who wants the best avail· able sailplane but hasn't the time or ability to build one. Utilizing the most ad vanced lay-up technics along with our molded process and efficient airfoils, the Sea Breeze is strong, maneuverable, SPECIFICATIONS: and easy to fly. Wing—99.75" wing span Epoxy fiberglass fuselage Area 760 sq./in., 12.7 Aspect Ratio complete with push rods installed, Root Airfoil Eppler 385 Mod 2 fully painted in white. Wings and Tip Airfoil Johnson 16 with 3° washout stabilizer molded from epoxy fiberglass Stabilizer— 120 sq./in. available in choice of six colors, (red, blue, Total weight less radio 40 oz. orange, brown, yellow or white). Just install your radio and go flyl UNPAINTED.......................................... SI 69.95 PAINTED....................................................$229.95 DEALERS: Contact one ot these fine distributors who handle our kits: • ΑΛ. DISTRIBUTORS · GREAT PLANES DISTRIBUTORS · MIDWEST MODEL SUPPLY R/C AIRCRAFT • TECHIMODELS · B. PAUL DIST · PAN AMERICAN * WORLD ENGINES ADDITIONAL DISTRIBUTORS WANTED 4 8 5 EASY ST., SIMI VALLEY. CA 9 3 0 6 5 (805) 5 2 7 - 4 0 0 4 / iťs official! Sullivan is... THE CHOICE OF CHAMPIONS At the 1979 National Model Airplane Championships, sponsored by the Academy of Model Aeronautics, winner after winner had the name “Sullivan” noted somewhere on their entries. A Sullivan tank. A Sullivan control line. Always, it seemed, a Sullivan something. Makes us proud to know that Sullivan is the choice of champions. Proud ... but not surprised. We take special pains with our products. They have to meet tough standards — the standards of serious modelers — us. Besides, we always knew our customers were champions. Tanks — We’re #1 Starter’s Big Brother Over half of the winning contestants in #1 Line of Winners For years, Sullivan has had the superstar the 1979 National Model Airplane Cham of starters. The starter that turned on the Winning control line flyers at the AMA whole world. The one with higher torque pionships held in Lincoln, Nebraska who championships chose Sullivan lines at specified what tank was installed on their & RPM’s, heavy duty, long life motor, a rate of almost 3 to 1 over the next "instant-on” strip switch, safety hand entries said they were using Sullivan most popular brand.

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