SEPTEMBER
wsftæi-ΐθ number . . m · *
" 1 j l ( a t S , / _ D Della Wing, History & Development Lippisch 15.95 " I D Aeronca C-2, Story ol the Hying bathtub 5.95 □ Messerschmitt Me 262: Arrow To The Future 11. □ F-16 A&B In Detail & Scale. Kinzey 5.95 □ The Piper Cub Story 6.95 Albatross DVa. German Fighter WWI. Mikesh 8 □ American Combat Planes, Revised. Wagner 29.95 □ Single-Engine Beechcratt, Christy, Revised 4.95 The Jet Age: 40 Years ot Jet Aviation Boyne 8 1000 Destroyed. Hall. 4th Fighter Group 11.95 □ Single-Engine Cessnas, Christy. Revised 4.95 P-80 Shooting Star, Woolridge 6. □ Aeroplanes Vought, Moran 16.50 My Secret \Afor, Oury. Skyraiders in Vietnam 10.95 Excallbur III. Story Smithsonian P-51 5, □ Staggerwing, Revised, Smith & Lempicke 27.95 C The Interrogator, Luttwaft s Hanns Scharft 12.95 Air Force Colors. Vol 1 1926-1942 Bell 7. □ Guide To Single-Engine Mooneys. Garrison 6.95 Fighter Aces 01 The USA Toliver & Constable 24 95 Air Force Colors. Voi 2. ETO & MTO '42 45 7, VACO □ Waco Story, Brandly Waco history thru UPF-7's 22.95 □ Air War, Jablonskt. was $40 00in 4 vols. 24.95 □ Waco, The Famous “ F " Series. Brandly 11.95 Π Test Pitots. Hallion. Jenny to Gemini 17.95 Herk: Hero 01 The Skies. Dabney C-130's 8. □ Waco Airplanes 83 types. Brandly 10.00 & Private Aircraft 16.95 MiG Master: Story F-8 Crusader. Tillman 17, □ Waco. The Versatile Cabin Series. Brandly 14.95 F-86 Sabre In Color. Davis. 16pgs lull color 5, □ Curtiss, The Hammondsport Era. Casey 19.95 □ Thundering Peacemaker, B-36 Story 4. □ Legacy ot Wings, Pitcairn Story. F.K. Smith 25.00 □ Bombers In Blue, Johnsen 4. □ Those Incomparable Bonanzas, Ball 16.95 Blue Angels, Excellent photos &text 14. □ Cessna Guidebook. Early Cessna's 9.95 □ OeadlyOuo. B-25 & B-26 in WWI 19. □ Ryan Guidebook. 50 years Ryan 9.95 □ III. History ot Fighters, Gunston 13. □ Grumman Guidebook 84 types 9.95 □ Fighters ot the Fifties, Gunston 22. □ Stearman Guidebook 160 photos 9.95 □ History ol the U. S. Air Force, Anderton 16. The Ford Air Tours 1925-31, Forden 14.95 □ Flying Colors, Green&Swanborough. 112 A/C 24.95 □ Air Mail, Holmes. III. history 1793-1981 27.95 □ Ency. ol German Military Aircraft. Phllpott 10.“ □ Yesterday's Wings, Bowers 8.95 C o rsa ir” D F-15 Eagle, Jett Ethell .15. □ Reuben Fleet. Consolidated A/C 16.95 returning io carrier □ F-104 Starfighter. Authur Reed 17. □ Commercial Aircraft. Jet airlines business A/C 12.95 □ F-105 Thunderchiel. Jerry Scutts 17. □ Propeller Airliners, G unston ...... 12.95 Sever The Sky. Maloney. Seversky A /C ot '30 s □ B-52 Stratotortress. Ethell Christy 17. Pictorial History ol the Blue Angels. McGuire □ World Greatest Airplanes. G unston ...... 12.95 Darkly Dangerous. Johnsen P-61 Black Widow 4. □ Aircraft Piston Engines. Smith 18.95 U S Navy Aircraft Since 1911.545 pgs □ A-10 Thunderbolt II. DeMario Excellent rel 9. □ 1927. Summer 01 Eagles, Huttig 11.95 Corsair: F4U in WWII and Korea. Tillman B-17 Forfress. in Detail & Scale. Lloyd & Moore 6. □ The Barnstormers. Don Dwiggins ...... 5.95 Hellcat: F6F in WW II. Tillman. 265pgs □ F-4 Phantom II in Detail & Scale. Bert Kinzey 6. □ Wings ol Man: Story Dick M errill, by King 18.95 Dauntless Dive 8omber ol WW II. Tillman □ Grumman Tiger FIIF-I, Ginter 3. □ Airmail, III. Hist.. 1793-1981. Holmes 27.95 U S. Naval Fighters ol WW II. O’Leary □ McDonnell Banshee F2H- 1.2.B.N,P.3,4 7. □ Ughtplanes Since 1909. Underwood 10.95 □ McDonnell FH-1 Phantom, Ginter 4. □ Flying The Old Pianos. Tallman 24.95 CROWN COLOR SERIES Π P-51 Mustang, G rinsell...... □ Douglas F3-D Skynight. Ginter 9. □ Fantastic Flying Machines, Taylor 12.95 15.95 □ Hellcat, Anderton ...... □ North American T-28 Trojan, Ginter 8. □ Spirit Of Ryan. Cassagneres 11.95 15.95 C Spitfire. Sweetman ...... □ The Mighty Eighth. Freeman 19. □ The Oshkosh Fly-In. Downie 9.95 15.95 □ Zero Fighter. M ikesh ...... □ Ninth Air Force in WW II. Rust 16. □ Ultralight Airmanship. Lambie. On flying skills 9.95 u Messerschmitt Bf 109, Grinsell □ Rulan Homebuilt Aircraft. Downie 8.95 15.95 Mongram Painting Guide To Germ. AC '35- 45 39 D Focke-Wult Fw 190, Grinsell C Boomerang. Victor T a n n e h ill...... 4( D Ultralighl Aircraft, Markowski. 40 types 12.95 15.95 □ AIRCRAFT OF THE NATIONAL AIR ANO □ THE STINSONS, by John Underwood Ab SPACE MUSEUM. Detailing over 100 sorbing history ol me Stinson family and Q F9F PANTHER/COUGAR IN ACTION by Jim planes displayed by the Smithsonian tor E the fabulous planes lhat they made buttons Sullivan The Grumman Iron Works their significance to aviation, this book z Heavily illustrated with over 230 beautiful debut in iet-powered lighters, the F9F Pan spans aviation's history trom lbe Wnghl £ hotos, the author has pre rented a detailed ther was the Navy's mainstay In Ihe ground Flyer lo the F-86 Sabre with strong em Sistory ol Katherine & Eddie Irom Iheir emry support Concise text, line drawings. 117 phasis on the Golden Years” Includes a — into avaiaiion by barnstorming and produc· pholos and 12 color probles & 48 detail historical history ol planes role. 3-view g lion ot their aircratt through the 165 drawings cover Ihe Panther and its evolu drawing, specs, and vintage pholos. Every «r Voyager and Ihe demise ol the company in tion into Ihe swepi-wrng transonic Cougar Anbquer” will appreciate Ihis hook Over “ 1949 Revised edition 80 pgs 8 " x t l" Π -κ Β Ά " soltcover S4.95 250 pholos. 166 pgs δ '/ ι'χ Π " soil- sottbound $9.95 cover $4.95 F4U CORSAIR IN COLOR by Jim Sullivan C HOWARD HUGHES t HIS FLYING BOAT, by Coverage with the modeler in mind, ihe D 8LERI0T XI. by Tom Crouch Traces early Barton The real story ol Howard F4U-1. F4U-2. F4U-4, and F4U-5N are history and development ol early Hughes- his Me. his Rights and Ihe Spruce shown in 56 color and B&W photos, and in monoplanes and the historic crossing ol the Goose For Ihe first time former Hughes color 4-vlew artwork Detail emphasis on English channel by Louis Blériot Also, a employees and close associates talk about cockpits, wheel wells ano ordnance, wrlh complete slep-by-siep coverage ol the their boss relating the behind the-scenes more than 25 profiles and 63 detail paint restoration process ol a Blériot XI by Ihe stones that lift the veil ol secrecy and con ings by Don Greer 32 pgs . 8Vr” x i r . Smithsonian Well illustrated with a com troversy about Hughes and his projects. softcover 5.95 plete set ol working drawings. 111 pholos. Hundreds ol large sharp photos Irom Ihe I44pg$ . 8 W " x t t . softcover S9.95 Hughes Co hies 7 Y ."x lO V ·. 270 pgs . hardbound S19.95 JANE SERIES □ Mighty Eighth War Diary. Roger Freeman . . . 29.95 □ The Best Ot Wylam, 175 pgs. scale plans 8.95 THE PUTNAM SERIES C Curtiss Aircratt 1907-1947, Bowers. 640pgs 40.00 □ Target Berlin. Ethell & Price 19.95 SQUADRON/SIGNAI. IN ACTION $4.95 EACH D McDonnell Douglas Aircratt—1920.721 pgs 40.00 □ Mustang, A Documentary History. Ethell 18.95 D P -51 Mustang D F 4U Corsair □ Focke Wull FW 190 C Japanese Aircraft Of The Pac. War, 570 pgs 31.95 □ Boeing B-52, A Documentary History, Boyne 19.95 C Spitfire Q F6F Hellcat □ British Fighter Since 1912,415pgs 21.95 □ German Air Force 1933-1945. C ooper.. 19.95 □ P-38 lightning O Lancaster □ P-39 P-63 Ο Λ-10 Warthoq □ German Aircraft olW W II, 745 pgs 28.95 □ KC-200: The True Story. P.W. S ta h l...... 19.95 □ Curtiss P-40 □ F-5 □ German Jets In Combat, Ethell & Price . 17.95 □ Thunderbolt P-47 □ F-8 Crusader □ Mosquito, Philip Bribes ...... 19.95 C Boeing B-17 C F9F Panlher/Cougar ♦-^HISTORIC AVIATION C B-24 Liberator □ F-14 Tomcal □ Heinkel HE 111, Heinz N o w a rra ...... 19.95 D A-26 Invader □ F-15 Eagle 3850 B CORONATION RD.. EASAN. MN 55122 □ Lultwalfe Test Pilot, Hans-Werner Lerche .. 19.95 □ B-2S Mitchell D P-80/T33/F94 □ Fokker, A C Builders to the World, Postma 19.95 D B-29 Superfortress D F-86 Sabre 14 Day Money-Back Guarantee Please Print O B -36 □ F-104 Slarfighter Π German Night Fighter Force, 1917-45. Aders 19.95 O B-47 Stratojet □ F-105 Thunderchiel Total tor 8ooks AT WAR SERIES C B-52 Stratotortress Π F-106 Delta Dart O C-130 Hercules m □ A-20 Havoc At War, Hess 17.50 □ F-111 Handling Fee σ> q □ PV-1 Ventura C Gunslingers I i Avenger At War. Tillman 17.50 ^ DC ! Messerschmitt Bl 109 C Albatross Figher WW I ENCLOSED IS Total (U S Funds) □ B-29 Superfortress At War, Anderson 19.95 AIR FORCE STORY uo«xr o □ Fifth 7.95 I Typhoon and Tempest At War, Reed 14.95 I Thirteenth CHARGE □ VISA MASTER CHARGE I 1 MesserschmittBI109AtWar, vanlshoven 14.95 □ Seventh 7.95 Fourteenth □ Eighth 8.95 [ Fifteenth Acct # ______Stuka At War. Smith 19.95 L ] Tenth 7.95 ( Twentieth co <£ 7.95 9 co B-57 Canberra At War: 1964-1972. Mlkesh 17.95 □ Twelfth Exp Date ____ MC Bank # PILOT MANUALS <*> ο σ> □ P-38 Lighting 6.95 D B -25 Mitchell 10.95 Name ______o < .S C) P-39 Airacoba 6.95 C B-26 Marauder 6.95 co2=5 □ P-40 Warbawk 6.95 C F-4U Corsair 7.95 > = □ P-47 Thunderbolt 6.95 □ F-6F Helical 7.95 Address ____ O co H A ’s CLUB PLAN! — o a : D P-51 Mustang 9.95 C FM-2 Wildcat 10.95 co _ Send me info on how my club and □ P-61 Slack Widow 7.95 C Texan AT-6 6.95 City . a) e □ P-63 King Cobra 7.95 C Spitfire 3.95 F-82 Twin Mustang 7.95 Z Hurricane 3.95 Stale o £ 2? I can save up to 50% on HA’s □ B-17 Flying Fortress 8.95 [ Mosquito 3.95 £ £ o Q B-24 Liberator 10.95 l Messerschmitt 1 ! 7.95 books and prints. F-80 Shooting Star 7.95 Country M O D E L 0 SEPTEMBER 1982 BUILDER volume 12, number 128 CONTENTS STAFF EDITOR/PUBLISHER FEATURES Wm. C. Northrop, Jr. WORKBENCH, Bill Northrop ...... 6 GENERAL MANAGER OVER THE COUNTER, John E llio t ...... 7 Anit.i Northrop R/C WORLD, Bill Northrop and John E lliot...... 10 ASSISTANT EDITOR HOW TO FLY PATTERN, Dick Hanson ...... 17 |ohn Elliot THERMIC 210, C hris V an D e v e n te r...... 18 ASSISTANT GENERAL MANAGER CHOPPER CHATTER, Ray Hostetler...... 20 Dawn Holcomb BIG BlRDS, A l A lm a n ...... 22 DRAWINGS BY FUEL LINES, Joe Klause ...... 24 Al Patterson ELECTRIC POWER, M itch Poling ...... 28 OFFICE STAFF TOP FLITE J-3 CUB REVIEW, B ob Banka ...... 30 Edie Downs Mike Whitney R/C SOARING, Dr. Larry Fogel...... 32 A. Valcarsel PLUG SPARKS, John P o n d ...... 35 CONTRIBUTING EDITORS ELECTRONICS CORNER, E lo y M a r e z ...... 40 Al Alman Joe Klause R/C AUTO NEWS, Dan Rutherford ...... 42 Jerry Dunlap Eloy Mare/ R/C POWER BOATS, Jerry D unlap ...... 44 Larry Fogel Walt Mooney CONTROL LINE, Dan Rutherford ...... 46 Jim Gager Mitch Poling Bill Hannan HANNAN'S HANGAR, Bill Hannan ...... 48 John Pond Dick Hanson Fernando Ramos FREE FLIGHT SCALE, Fernando Ramos ...... 52 Ray Hostetler Dan Rutherford FREE FLIGHT , Tom Hutchinson ...... 56 Tom Hutchinson Dave Thornburg Ken Johnson Bob Underwood ADVERTISING John Elliot CONSTRUCTION Wm. C. Northrop, Jr SAND FLI, B ob Banka ...... 15 MODEL BUILDER (ISSN 0194 7079) is published monthly by RCMB INC . 621 M itc h P oling ...... ELECTRIC BRIGADIER, 25 West Nineteenth Street, Costa Mesa, Cali O.T. ARROW, B ill G ib s o n ...... 38 fornia 92627 Phone (714) 645-8830. H o b y C la y ...... PEANUT SORRELL GUPPY, 49 Subscriptions: $25.00 per year, $47.00 for DAPHNE, P erry Peterson ...... 54 two years. Single copies $2.50. Add $7.00 per year for postage outside the U.S. (except THE PAWN, Paul S m ith ...... 61 APO & FPO). All payments must be in U.S. funds, drawn on a U.S. bank. Copyright 1982 by RCMB INC All rights reserved. Reproduction without permis sion prohibited. Change of address notices must be received six weeks before date of issue that new Cover: Terri C. Cassell, who stands 5'-6" tall, is dwarfed by the awesome wingspan of address takes effect Send old address with the Thermic 210. Builder Chris Van Deventer enlarged the plans from Frank Zaic's Thermic 70 to achieve the 17-1/2 foot wingspan. The model took three years to con new; old label preferred. Post Office will struct. Builder is now awaiting proper conditions (enough nerve) for the Thermic 210's not forward copies unless you pay extra first flight. Complete story begins on page 18. Photo by Van Deventer on 6117 Ekta- postage. Duplicate issues cannot be sent. chrome 4x5 film with 81A filter. Normal exposure. In the background . . Knoxville’s 1982 World's Fair. Second class postage paid at Costa Mesa. California, and additional offices 2 MODEL BUILDER Changing track conditions can servo reverse switch Convenient needle valve send RC cars scurrying into the ing, electronic trim, adjustment knob. . pits fora linkage adjustment that mixing and throttle Exclusive torque compensation —. could take laps to complete. fine tune in the hand mixing control. The driver with Futaba's 3FG some brushed alloy doesn't panic though, because he case. Prefer lYvin-stick control? has Total Control on his side. The 3-channel 3FG We’ve built the 3EG model for sou. Available A flick of a lever and the system is available with with S26 or S27 servos. adjustable dual rate takes over. a wide range of servo options, too. Ultra mini for 1:12 scale electrics, while Increase or decrease steering S20 servos are perfect boat and gas car racers favor the servo throw while maintaining full lock-to-lock control. The Gentlemen, chouse your servos. watertight, heavy-duty S27’s. 3FG gives you a choice, on the track. And for total performance, I he deluxe 3FG/3- the 3FG can be ordered channel sy stem includes An oversteering, R3F triple-tuned receiver. with high-torque, coreless 2-S24 servos. NiCads and sliding car charger. 27 and 72MHz. ( * F u ta b a motor S24's and recharge instantly able NiCad batteries. responds to the i, G G pre-set steering ratio and is dialed-in again. The 3FG system was developed by and for serious racers. In addition to rate control, you’ll also find Track tune your racer from the driver’s stand with the new Futaba 3FG. SUNDAY FLIER______Ken Willard says: “ I use HOT STUFF & SUPER ‘Τ’ to build all my models. Over the years I’ve found that I can depend on them for extremely FAST, incredibly STRONG and ultra light construction. So, I tell all my RCM's Chief SUNDAY FLIER. KEN WILLARD with his new “ SEAMASTER SPORT .40” as published in May M o del modeling friends: A v ia tio n . GO THE FAST, EXPRESS WAY WITH “HOT STUFF’1 & SUPER ‘T DON’T BUILD MODELS WITHOUT THEM!” f c HOT STUFF”™ ORIGINAL PENETRATING FORMULA Va Oz. Vi Oz. 2 Oz. ECONOMY SIZE AVAILABLE IN CANADA ANY WAY YOU LIKE! DISPENSE THREE WAYS! DO NOT REMOVE S A F E T Y O C K INSERT ( i HOT STUFF j j SUPER ‘Τ ’ VIDEO-TIPS GAP-FILLING POSITIONABLE FORMULA ONE HOUR VHS CASSETTE • CLUB MEETINGS Va Oz. y2 Oz. 2 Oz. ECONOMY SIZE • HOBBY SHOPS AVAILABLE IN CANADA • DISTRIBUTORS • ORGANIZATIONS LOOK FOR THE “ HOT STUFF” tm DISPLAY AND PICK UP YOUR FREE TIP BOOKLET AT YOUR FAVORITE DEALER CALL OR WRITE FOR MORE INFORMATION Siafeččife, C iöy P.O. BOX 836, SIMI, CA 93062 e (805) 522-0062 4 MODEL BUILDER /■ with Top Flite's J3 Cub Reminiscent of days gone by and the original Piper Cub. wire parts · Scale, easy-to-build, "Clark Y" airfoil · Complete Top Flite's J3 Cub recalls the grass fields and gentle breezes hardware package · 3 full size, illustrated plan sheets that spirited thousands of pilots into the sky. · Detailed, illustrated instruction Top Flite's scale, radio control J3 Cub is a faithful replica of manual with step-by-step direc- the plane that has Jfe . . -c,’1· tions for the builder, proven to be an excel- tf· , S φ For the final touch, you lent trainer. A large. need Top Flite's new Fabri- scale aircraft that flys Kote'“ . It's a superior fabric with .40 engines at ‘ covering that's light, adds tor scale speeds. ^ sional strength, is extremely dura- ideal for the model- ble and adds authenticity to your Cub. . . er ready to advance to Φ looks just like the original! scale aircraft. Take off on the wings of time. . . for the The kit offers standard wing configuration or a clipped wing time of your life . . . with Top Flite's J3 Cub. version for more aerobatic response. Outstanding features SPECIFICATIONS: include: Exclusive one piece “ Cub Yellow" injection molded cowl — Complete, scale, 3 sheet decal package W in g s p a n ...... 77V i" L e n g th ...... 49V» — One piece glass, fibre-filled motor mount. W in g A re a ...... 795sq.in. Flying Wt . 4Vi to 6Vi lbs. W in g s p a n (Clipped) . . 5 9 Ά " Engine Size .. .35 to .50 Top Flite Quality Features Wing Area (Clipped) .. 595 sq. in. Radio Equip. . 4-Channel • Machine finished, precision die cut parts clearly printed for K it N o ...... R C -28 positive identification and ease of assembly · Shaped, hardwood struts · Two, complete, die cut acetate window Top Flite Models, Inc. and windshield sheets · Scale-like balsa and plywood con 1901 N. Narragansett Ave struction for strength and lightness · Preformed landing gear Chicago, Illinois 60639 For our latest catalog and prop chart, plus a free sample of MonoKote and FabriKote send request with 50 cents to Top Flite OVER THE COUNTER A ll material published in "Over the Counter" is quoted or paraphrased from press releases furnished by the manufacturers and/or their advertising agencies, unless otherwise speci fied. The review and/or description of any product by R/CMB does not constitute an endorsement o f that product, nor any assur ance as to its safety or performance by R/CMB. • Top Flite Models has recently added Circus Pink and Metallic Brown to its line of 5-inch by 36-inch MonoKote trim sheets. Perfect for field repairs, or making your own decals, too. The back of each trim sheet has various letters, numbers, and patterns printed on it to ease the work of decorating your latest project. Twenty-two different colors, Historic Aviation has just issued its including checkerboard patterns are 1982 spring edition catalog, listing many now available. For the latest catalog and new and interesting books for the free samples of MonoKote and Fabri- aviation buff. Harrier, by Francis Mason, Kote, send your request with $1 to: Top derided as impractical, details the evolu Flight Models, Inc., 2635 S. Wabash Ave., tion and flight tests of this V/STOL Chicago, IL 60616. concept. Detailing the j-3 Cub? Order ★ ★ ★ the reprint of the original service Hobby Horn is now handling the manual with all the photos and draw complete line of Hal Osborne Scale ings! Books for the Sportplane builder to Plans and Drawings since the untimely Antique Plane lovers are all available passing of Mr. Osborne. Hal’s work was here. Send $1 for the latest catalog to: well respected by those who just simply Historic Aviation, 3850 Coronation collected his drawings or by those who Road, Eagan, MN 55122. acquired his plans for research and ★ ★ ★ modeling purposes. For a plans list, Cannon R/C Systems, importers of the send 50 Cannon Electronics’ G-Mark .30 twin R/C with integral muffler. Brass propellers for R/C Scale Boats from Dynamic Models. SEPTEMBER 1982 7 Wedge Lock sanding block. Uses sanding belts. Circus Pink and Metallic Brown Monokote Trim Sheet from TopFlite. Four more 100% epoxy resin cowls from T&D Fiberglass Specialties. porting dual ball-bearings, a slide car If you have ever driven by an excava buretor and integral muffler. The .15 tion or construction site and watched a R/C weighs (complete) 6.3 ounces and dragline operator engineer, now you has a speed range of 2500 to 15,000 rpm. can do so, in miniature! Bud Kahn offers The .30 R/C twin weighs in at a modest a complete set of plans and instructions Cannon Electronics' G-Mark .15 R/C with 11.5 ounces and will turn a 9x5 prop 2500 on how to build your own, including the integral muffler. to 15,000 rpm. The price is $79.95 and console to operate this remote con subjects. Drawings, plans,photos,books, $174.95, respectively. Dealer and Dis trolled, 1/20 scale model crane and and more! The 1982 set of Aircraft tributor inquiries are invited. Send 75t dragline. Power tracks move forward catalogs are $2 and a worthwhile addi for the complete catalog to: Cannon and reverse, the boom raises and lowers tion to any scale modelers library. Avail R/C Systems, 13400-26 Saticoy St., No. and can be swung right and left. The able too, are catalogs on ships, sailing Hollywood, CA 91605. three drum hoist unit is equipped with vessels, and even tanks and armored ★ ★ ★ brakes and it operates just like the real vehicles. Send a SASE for prices or Cyro Dyne Specialty Gases has made one. Send $1 for brochure, refundable telephone (503) 822-3280 for more available a disposable, high pressure when you purchase the complete set of information. Repla-Tech International, steel C02 cylinder, complete with high plans consisting of six sheets of drawings Inc., 48500 McKenzie Hwy., Vida, OR pressure valve and appropriate safeties and three sheets of instructions for 97488. Dealer and Distributor inquires for 'refueling' all existing C02 engines $19.95. Bud Kahn MB, 1309 Avon Allen are invited. utilizing loader nozzles available Rd., Mount Vernon, WA 98273. ★ ★ ★ through Brown Junior Motors, Inc. For ★ ★ ★ A superb multifunction fueling and more information, write to: Cyro Dyne For “ Replicate Technologium no shutoff valve manufactured in small Specialty Gases, 445 State St., North Endom” , Repla-Tech International is the quantities by J.E. Albritton has now been Haven, CT 06473. place to write! Available are scale made available. When refueling under ★ ★ ★ drawings from many sources on many racing conditions, the pressure refuel ing supply valve depresses the valve stem to: (1) reset the shut-off mechan ism, (2) open the tank vent, (3) shut the carburetor fuel feed (to prevent flood ing), (4) prime the engine through the exhaust port using an adjustable meter ing device that gets the prime'just right,’ and (5), the unit contains the carburetor needle valve. Only $60 for a competition proven (2nd place 1980 World Champs in Poland), m ultifunction valve. B.B. Brown, Jr., 4108 Mason Ridge Dr., Anna- dale, VA 22003. ★ ★ ★ Art Gross Enterprises has announced Quarter-scale Monocoupe 90A, by Ikon N'wst. the new Wedge Lock super hand sander. Made from high impact styrene, it 8 MODEL BUILDER Frequency hats from Charlie's Goodies. Fully operable crane and drag line, from Bud Kahn. features a press locking "wedge" to also be used for ailerons or flaps on large add 6% tax. Specify frequency wanted. release the sanding belt for reposition scale models with demountable wings. Available from: Charlie’s R/C Goodies, ing or replacement and to lock and Suggested retail is $9.95 plus shipping P.O. Box 192, Van Nuys, CA 91408. retension the belt. Standard 3 inch x 18 from: Wilshire Model Center, 3006 ★ ★ ★ inch belts are available in commercial Wilshire Bivd., Santa Monica, CA 90403. T&D Fiberglass Specialities continues grade cloth belts as well as waterproof California residents add 6% tax. to expand its ever growing line of belts in different grits. One side is fitted ★ ★ ★ fiberglass accessory items for the scratch with a cushion pad for that smooth finish Prevent glitches, wear a hat! 'Charlie' builder. For those who are considering while the other side will insure a flat offers a new R/C cap in two high- building Roger Stern’s big Liberty Sport surface or edge. Suggested retail is$4.98, visibility colors with emblazoned num (Feb 1981 MB) or Bob Upton’s Baby Ace which includes one #80 grit belt and bers to match your 72 Mhz frequency. (May 1978 MB), T&D has the cowls! Also, should be at your dealers now. Dealer One size fits all (’tis adjustable!). Better cowls for Jim Folline’s PT-19 and Dario inquires are invited. Send a SASE for than flags! Regular $8.95; special $6.50 more information to: Art Gross Enter plus $1.50 shipping, California residents Continued on page 64 prises, 12516 Maplewood Ave., Ed monds, WA 98020 or call (206) 743-9332. ★ ★ ★ Wilshire Model Center is now import ing the well engineered, quick dis connect aileron torque-rod drive units by Gunther Isensee. With more and more high performance sailplane de signs incorporating ailerons for more recise control, the two-fold problem of ow to actuate them with no flutter and a simple, easy method of driving them while keeping the aileron servo in the fuselage, has been solved. The torsion aileron linkage kit comes with two 38- inch long torque rods, nylon control arms fitted with square, quick-discon- nect steel drive pins, plus bushings and Hot-wire foam cutting kit, from Bootlegger R/C Products. clips to complete the installation. Could Kirn-Kraft Cox engine accessories. CO2 charging cylinder from Cryo Dyne Specialty Gases. SEPTEMBER 1982 9 Not-yet-finished Andreasson BA-11 by Einar Edland, powered John Haggard's very attractive quarter-scale Fairchild 22, designed by Tartan Twin on glow. and built by Jerry Heaton. Yes, we're after it! didn’t separate from the aircraft is a good question. Low throttle netted control again of the bird, and back on the ground in one piece .. . Dave? ‘Big’ S" WO R LD Bert Baker had several good flights on BILL NORTHROP and JOHN ELLIOT his .90 powered P-47 Jug. See page 11, August MB for twin to Bert’s, (’tis a tentative MB construction article!) • Would you believe: "Flying is a lot appearance, too. Look for it in hobby Was interesting to watch Bob Jones better than talking about it or watching shops, soon. ‘arrive’ in his converted Greyhound, it, practicing improves your imperfec ★ ★ ★ pulling a trailer (hangar) full of his air tion!” From the Pioneer Club’s The Chapter 3 QSAA fly-in drew force, consisting of a Ryan ST, SE-5, J-3 Modulator. approximately 44 quarter-scale birds out Cub and Gere Sport, plus an Ercoupe ★ ★ ★ for a good airing recently. Talented that got lost on the bus, plus a sports car In Dr. Larry Fogel’s R/C Soaring young John Bashore, Jr. was racking up for quick local trips, too. column in the June issue of MB, an flight time on his Don’s Custom Models ★ ★ ★ innovative approach to aileron linkage ‘Scholl Super Chipmunk’ and leaving a As of late, it’s been interesting to note was presented in mock-up form to big, thick trail of white smoke, proving the strong resistance among Expert and illustrate how it worked. At a recent where he had been! A good looking, Masters class (especially) pattern flyers QSAA fly-in, Einar Edland of Sweden was good flying bird. The boys from Con- regarding the current FAI pattern rule showing production samples of this tempo Hobby had a pair of Eagles out proposals . . . One does sometimes unique "Controlhorn" linkage to be spreading their wings under the gui wonder where or how some of the FAI’s called the ‘Swingee’ and soon to be dance of Joe Aguilara. Joe later flew thinking comes about, good or bad. To marketed in the U.S.A., according to Dave New’s push-pull Cessna and one digress a moment; for years the FAI R/C Einar. A super idea for hiding linkage on high speed pass netted the wildest Scale purist has been saddled with .60 sailplanes and scale birds, and for en flutter in the twin booms and stab you engine limits and 11-pound maximums. hancing aerodynamic performance and ever saw, it was that apparent! Why they This does several negative things, for Oh no! A Kawasaki-powered double-size Antic Bipe. Not sure the wheels are big enough. Flies Bashore's 'Munk is 2.4 Kioritz powered, at 20 mph flat out. Weighs 61 pounds! Phillip Kling, Oxnard, CA. Futaba radio controlled, 26 pounds, smoke. Pair of Contempo Hobby Eagles, by Dave Henry and Norm Jacobson. John Bashore, Jr., lands his Art Scholl 1/4-scale Chipmunk (with Powered by Magnum It's, of course! sliding canopy). Looks like tail wheel made it first. 10 MODEL BUILDER George "L ittle Toot" Meyer's completely scratch-built 1/4-scale 5-cylinder radial. It's 3 cu. in., weighs 3-1/4 lbs., turns 6,000 w ith glow fuel. Same valve system as old Kinner, five camshafts and six gears in case. 2:1 gear reduction. Knitting needle push rods with drill rod ends. Bert Baker's 1/6-scale, Webra 90 powered P-47 "Jug" on a couple of passes. Span is 81 inches. Note tail wheel also retracts. instance, it restricts many interesting spend 60% of their time flying straight and multi-engine aircraft due to small and level and performing turnarounds size dictated (two ,30’s for a twin, as an and the other 40% being scored. The example) by the rules, which also means new FAI routine, along with being more a faster than realistic speed. So, we interesting to watch, does offer shorter automatically rule out many interesting flight times, hence possibly more flights scale subjects because they can’t be >er day, and no reason why two flight made to perform well within these Íines can't be made to work. Would you parameters. What's this have to do with believe that Mile Square is almost too Yes, it do run! Gets 8 minutes on 6 oz. of pattern? Certain parallels in rule evolu small for pattern birds, due to the overfly fuel. One gallon to completely break it in. tion, in most cases, it seems, too slow. area needed? Another thought for you, Look at the popularity in Sport Scale; and that is that the use of tuned pipe/ ‘quick’ a QM, wearing a pipe, would be bigger engine displacement allowed, mufflers gave us a bit more power and . . . Or, a Form 1, for that matter, after all, along with higher weights being per- helped us through the ‘muffler period' ‘go fast’ is the name of that game. missable. Look what has happened to of some years ago. The Form I boys still I will agree that the pattern birds of AMA (museum) scale, it’s almost dead, think that black magic is involved, still today are fast, smooth, and graceful in and nowhere to go. A good Sport Scale run open pipes, and don’t have too flight. Prettner’s Dalotel is just smooth model of today could have won the Nats many good sites left to fly from. Several and graceful. Speed is impressive in Scale event eight to ten years ago. years ago, Quarter-Midget races were itself, but not really that necessary for Ten to 14 years ago, slow, thick winged held at Mile Square, using mufflers for precision aerobatics (excuse me, pat pattern birds were considered as ‘it’ reasons of maintaining the peace (and a tern). The current generation of pattern (mostly in this country) by many pattern place to fly), and they really weren’t that type engines, won't become dust collec types, but the ‘Jersey Jim' Martins and much slower. I often wondered how tors that quick really, but time does the Ted Whites soon proved otherwise with the then faster, smoother styles of flying. We used to have the arguments about ‘C’ or ‘D’ expert, ‘D’ being the then current FAI pattern routine at the time, and did we need both classes, etc. The troops in the upper classes generally have their sights set on the "Masters” and the FAI Champs, but many, even today, wouldn’t admit it. If you're going to (or want to) fly international class competition, be prepared for it. Joe "Zinger Props" Zingali's recently acquired Art Johnson designed P-38L (from MB plans). Today, we have pattern birds that Kraft single stick radio, retracts, Zinger 3-bladers. SEPTEMBER 1982 11 Mr. T&D Fiberglass, Tom Keeling, with his Heath Parasol, from MB Clean sweep! Daniel Falco, Argentina, won South American, Pan plans. Used his Ford Model "A " version of 'glass cowl. american, and Argentina championships, all at Cordoba, Argentina. march on. More modelers would buy the high performance ‘torquer’ rather than the high performance, high rpm screamer. We hear of long stroke, per formance .60's being developed... Handwriting on the wall, perhaps? A high rpm/horsepower engine is usually Schneurle ported, but all Schneurle ported engines are not screamers . . . Did the owners of all the Kwik-Fli’s cry all that much years ago? Nah, just went ahead built the latest state of the art pattern bird to fly the changing pattern. An awful lot of emotionalism is being expressed as to why the new proposed FAI thing won’t work. Don Lowe has proven that it can and will work. A At fly-off in Argentina (I to r) standing:D. Falco, T. Converset, V. Amenduni, R. Ishkanian (all Argentina), S. Pompei (Brazil). Kneeling; M. Watanabe. P. Romano (Brazil). couple of years ago, Hanno came to TOC this year! ‘Vegas' all prepared when the Aresti/ These thoughts are not meant as a put- Scale-type concept was introduced. Just down for the design/development pro about everyone else had a scale-type cess of the current generation of pattern airplane that was sized to pattern bird machines as much as they are to expand concepts, but Hanno cleaned every the thinking process as to where pattern one’s plow, and still is. The boys in this is now, where it may, could, or can, go. country are still playing catch-up. Won Here is an example, and I believe, der what Hanno has up his sleeve for the classic. When the Tournament of Cham pions was first formulated under the basic sponsorship of Bill ‘Circus Circus' Bennett, it was just a gathering of top pattern flyers, with pattern aircraft, flying for some super cash prizes and Bob Hunter flew his Rossi .65 powered Satellite 1300 at Natl. F/F Champs, Taft, Calif, with R/C cut-off, rudder, and elevator. Had completed over 15 flights, when engine failed to stop. Once nose was down, air loads got too high for control. . . he'll build another. 12 MODEL BUILDER Angel Maldonado, 2nd in Argentina Nats. Flew on team at Acapulco World Champs. Marcial Davila, Mexico, and Argentina's Tulieo Converset. More info in text. recognition. Some people went to watch. Bill Bennett and Jerry Nelson, in Inexpensive servo exerciser! As sketched in HB Model Techniek, from Holland, this balancing essence, said to hell with the AMA/FAI game should provide lots of fun while sharpening your touch on the transmitter sticks. If you scale/pattern rules and developed what think you'll get too good at keeping the ball centered, make the glass plate removable by inver is now the present ‘class' of competi ting the board, then slip in various diagrams to make the ball travel along various paths. Just tion flow n at 'Vegas and gaining in comer to diagonal opposite corner in a straight line should keep you busy for a while! popularity around the world. The event organization dedicated to EMF (electri tina, Marcial Davila of Mexico, then has excellent cash prizes, recognition, cally motivated flight!). For more infor Tulio Converset, Vicente Amenduni, and tremendous spectator interest, to mation and an application form, send a and Roberto Ishkanian, all from Argen say the least. The most recent pattern SASE to: Frank Heacox,c/o SEAM, 11632 tina . . . to name the first 10 places. contest at Mile Square had very good Flamingo Dr„ Garden Grove, CA 92644. In the South American Champion contestant numbers, but where were ships, the first five places were the same, (are) the spectators (yes, spectators are MEANWHILE, IN CORDOBA followed by Tulio Converset of Argen necessary to expand the hobby from a Modelers seem to manage to press on tina, Kamoi Tadashi of Peru, R.Galdames manufacturers standpoint and to help regardless of the world situation, even of Chili, Tomas Cantore of Uruguay, Jose Luis Rosas of Peru, and Augusto Villar of prove, in many cases, the need to keep when trouble is almost at their doorstep. and obtain new fields)? Simply, and On the 7th through the 11th of April, Uruguay . . . 11 places. unfortunately, pattern flight is interest In the Argentine Nationals, the first 1982, Cordoba, Argentina was the site ing only to the contestant and perhaps, for three concurrent R/C aerobatic five places went to Falco, Maldonado, Converset, Amenduni and Ishkanian, another contestant, and quite boring to championships; the Fourth Annual spectators as there is little or no inden- Panamerican, the 13th Annual South followed by Somenzini, Roberto Fornari, tification factor. Witness the crowds of American, and the 36th Argentina Na Juan Carlos Colombo, Gianluca Fabre- onlookers at a scale contest or un gues, and Rodolfo Sosa . . . 10 places. tional Championships. contest. We’d like to thank Hernan Falco for Argentina’s Daniel Falco, who flew at sending the photos and information ★ ★ ★ the World Championships in Acapulco, We hear that the Society of Electric was first in all three competitions. In the about these championships. Aircraft Modelers, or SEAM, is growing Panamerican, Falco was followed by COWL REPORT Tom Keeling, whose T&D Fiberglass as more advocates and/or those inter Plinio Romano, Salvatore Pompei, and ested in the world of electric powered Mario Watanabe, of Brazil, Angel Mal flight find out that there is, indeed, an donado and Mario Somenzini of Argen Continued on page 64 SEPTEMBER 1982 13 14 CM"«______,·' FULL SIZE PLANS AVAILABLE - SEE PAGE 96 PAGE SEE - AVAILABLE PLANS SIZE FULL OE BUILDER MODEL í&KÍID U M By BOB BANKA . . . An entertaining little biplane for one or two 1/2A engines (depending on your flying agility!) that can be built in a relative ly short time and requires only two channels of R/C. • After living in Canada, Chicago, and fun plane patterned after the pre-1920s Sand-Fli being launched by the author over its natural habitat, the sands of Newport Beach. Michigan, I finally moved to sunny Schneider Cup racers. It is easy to build, Southern California and lucked out to and was designed built, and flown within and it increases your enjoyment level; end up living on the beach, looking at the Pacific Ocean. Mile Square, one of one week. It can fly as well on one wing the beefing up comes in the struts the state's best known flying sites, is as with two, with either a tractor, pusher, supporting the motor and wings as there about 20 minutes away, but, being or twin-engine configuration. Using is very little stress on the balance of the selfish, I wanted to be able to fly in my Cox Tee-Dee(s), it will easily loop, roll, model. front yard. VIOLA! the Sandfli came snap, spin, lousy invert, and turn on a into existence. The motor is out of the dime and give you nine cents change. A CONSTRUCTION NOTES sand (dirt, grass, snow, etc. for those of young friend, John, who has soloed, did AND GUIDELINES you living away from the beach) its next his first snap roll and spins on my Main wing is very straightforward and to impossible to break a prop, and who Sandfli, and wants to be one of the first simple. Trace a rib pattern on stiff card knows, it might even be at home in the to build one. board or 1/16 ply. Cut 18 ribs, pin water! I like to believe that we build models together and stack-sand, clean up The Sandfli is a highly maneuverable to fly and not to crash, so keep it light notches for leading and trailing edges A length of inner Nyrod was Hot Stuffed and epoxy resined to Although engine and prop are up and away from the sand, the "hull" bottom to take the brunt of the sand's abrasive qualities. carpet "pit area" is still a good idea. SEPTEMBER 1982 15 Lower wings plug into fuselage, and are supported by top wing and outer struts. Hatch held down by rubber band which holds lower wings in place. Yes, it can be flown without lower wings, but not in front of MB's Editor! and spars. Cut down two ribs to allow for covered anyway (I recommend not of Hot Stuff and a dusting of baking center sheeting and trim down two painting, use iron-on covering). You can soda. At any rate, cover the surfaces more ribs to allow space for dihedral make them out of 1/8 sheet of you wish. before hinging. braces in center section. I used figure-8 thread hinges for ease of Body (Hull?): Cut two sides of medium Lower wing and struts are held in installation and freedom of movement. to hard 3/32 sheet. Mark position of place with bands. Cut 1/16 slot in The 1/16 wire elevator joiner was also formers and particularly the vertical inboard rib, but do not glue tongue in sewn in place, followed by a drop or two struts. Epoxy struts in place, add doub place until upper wing can be mounted lers and formers. Dimensions are set for on body. Construct “ N” struts so that a Tee-Dee .049-.051 using a one or two wings are parallel to upper wing (sand ounce Sullivan tank and a 6 inch prop. If strut bottoms to fit, but don't glue in you plan to really go wild with a .10 size, place until wings are covered. At that adjust height accordingly to accommo point, insert and glue toothpick or date larger prop and tank. Epoxy the dowel alongside of strut to strengthen cross supports and diagonal side struts, the joint.) When wing tongues are use triangle supports as indicated, and inserted into body slot and upper wing is some good insurance would be to drill in place, all it takes is a couple of bands holes and insert dowels or toothpicks at over the wing to hold it in place. When junction points to help hold everything all is lined up, you can glue the plywood together better. Motor mounts of 1/4 tongue in place on the first and second square hardwood are bolted in place ribs, beef up the top and bottom at this and tank rests on mounts. If you are joint with scrap balsa, and you have a adventuresome as I was, you can extend solid attachment for the lower wing. the mounts to the rear to allow for Glue in another scrap of balsa between pusher, or twin operation. If you opt for the two ribs against the ply tongue to this, recheck balance point, as you will receive the screw that will hold tne two have to add weight to the nose in this lower wings to the body with a pair of configuration. I will warn you that as a rubber bands. The screw should be long twin, the Sandfli goes like a bat out of enough to pass through the balsa into hell, and maneuvers are quick to say the the ply tongue for maximum strength. least. Leave head exposed about 1/8 inch for Ah . . . but what a sweet sound twin band attachment. Tank straps to engine rails. Rails may be ex Tee-Dee’s make, and when one engine Tail surfaces are built up for visual tended aft for tandem twin power, if you effect and lightness, since they had to be want some wild action. Continued on page 65 Author/designer Bob Banka about to commit a sin . . . flying The Sand-Fli broken down for transporting. Construction is Sand-Fli with only the top wing. It just doesn't look right! simple and rapid. 16 MODEL BUILDER <% f t e í m ^ ^ s u t · cT%i«g By DICK HANSON Changes to improve airflow. Triangle pieces Three setups for retracts and outboard servos, along leg openings. 1/4-inch ply rings added Setup for "tail-dragger". Servos below sur which author favors. This was first attempt. to wheel cut-outs. Also better for Monokoting. face of wing, pushrods exit through large Openings to o large. Nyrod tubing. V inyl tape w ill seal servos. beneath the surface of the wing and the • In our last article, we wrote about push rods exit through large ny-rod airspeeds. The latter is also a direct result keeping airframes as light as practical. tubing. A piece of vinyl tape will seal the of the low wing loading on this design We would like to continue along this opening over the servo. The openings (approx. 22 oz. per sq. ft.) An interesting line and share a few more ideas witn you for the gear mechanism are deep thing about the lightweight/thin wing concerning lightweight setups. enough to permit mounting the gear at designs we have noted is that the vertical Also, the future F.A.I. rules dictate an angle (slanted forward). This allows diving speed does not build up as one changes in airframes to permit rapid the wheels to angle forward as they might expect. Apparently, the very low speed change and a very broad speed extend. weight is the key to controlling diving envelope. Here are some of our findings I’m certain the question of gear doors speed. in trying to develop a design which will and servo cover doors will be asked, but I must again point out that we are perform well under the proposed rules. my findings are that this extra work working with light wing loadings, and Photographs 1, 2, ana 3 show three serves no purpose. If the gear setup is the performance is not the same as we methods of setting up a wing for retracts, aligned so that the drag is equal on both obtained from earlier thin-wing designs plus outboard servos. Personally, we are wings (no sagging wheels) and every which gathered speed rapidly in diving sold on this double servo arrangement. thing is tucked in as close as possible to maneuvers. Photo 1 shows the first arrangement the fuselage, the results will be entirely Photo 5 shows the F.A.I. wing mounted we tried. Photo 2 shows the changes satisfactory. on the fourth fuselage assembly we have made to smooth up the airflow. These In Photo 4, we show a comparison of tried. The other ones were similar in consisted of adding triangular pieces wing planforms. The largest wing spans along the gear leg opening, plus insert 73 inches and has 825 sq. inches of area. Continued on page 65 ing a 1/4 inch thick disc of wood in the The next two wings both have 750 sq. wheel cutout. The disc was then cut out inches, but the shapes are very different. to provide clearance for the wheel. A The unpainted F.A.I. wing has a fairly secondary benefit is that it provides a thin airfoil by present standards (10%), deep edge to which the Monokote can but we have yet to see any disadvantages be attached. or bad characteristics from this shape. Photo 3 shows the setup for a “ tail The noticeable advantagesareextremely dragger.” Due to the forward location of low tip weight, which makes for easier the gear, it was necessary to clean things recovery of snap maneuvers (no over up as much as possible. The servos fit shoot) and good aileron response at low Comparison of wing planforms. Largest spans Latest complete experimental model appeals to be best compromise of desired features, plus 73 inches, 825 sq. in. Others are 750. Un looking somewhat like a real aircraft; something lacking in most pattern designs. painted F.A.I. wing has thin airfoil. SEPTEMBER 1982 17 THERMIC 310 By CHRIS VAN DEVENTER . . . The culmination of a 35-year love affair. Take a Frank Zaic-designed Thermic 70, m ultiply it by three, and you have a Thermic 210. Complete story of the plane on the cover. • In 1945, the year that World War II feeling bad. I'd missed first place by 5 aloft again. ended and the Atomic Age began, I was seconds and also lost a good glider. In 1948, I put the Thermic in a closet 17. I had been building model airplanes I continued to mourn the lost Thermic and went away to serve a four-year hitch for seven years and I was becoming 70 until, about two weeks later, I came in the Army A ir Corps. In Japan, I more and more addicted to the art. home from school and found a letter in discovered photography. It was to be I had discovered that the best flying, the mailbox from a farmer who lived the focus (!) of my life for many years, hand-launched gliders were the Jasco about 40 miles away from Marietta. He evolving from a hobby to a career. Thermic Series. I wanted a larger, built- had found my plane and was mailing it Model building was more or less up towline glider to build and fly; the back to me. The crate arrived and I shelved, along with the Thermic 70 in Jasco Thermic 70 had been on the opened it expecting the worst; the the closet (it, by the way, wasshowing its market a little over a year. It cost $3.50, remains of the Thermic 70. But the age and after a trial flight was put back in but I found it on sale at a hobby shop for dauntless plane had survived the crash storage). $1.00. I also purchased a giant tube of and exposure to weather and was soon Twenty years passed. One day, rum- Comet Glue for 25 Bottom view of completed wing, showing spoiler section. Very Shot from underside showing multitude of bracing and cross positive, and should not open on tow. bracing. Keep in mind .. that's a 5-inch wheel. 18 MODEL BUILDER Completed sets of wing ribs, minus root rib. KPS-16H servos on elevator and rudder. Nineteen pieces to each rib. KPS-14's on ailerons and spoilers. Count ’em! maging in the closet for something else, Plans for the Thermic 210 were drawn I came upon the Thermic 70. By now it from the plans for the Thermic 70. was ancient, a nostalgia item, with its Everything was enlarged three times. rotten wood and doped tissue that was What was 1/8 inch on the Thermic 70 was Yes, Clyde, that's a full size Kraft series 75 cracking and peeling. A sad sight. . . and 3/8 inch on the Thermic 210. Wing ribs transmitter. I had a hunch if I gave it a real goo d look, were enlarged and reproduced photo it would disintegrate before my eyes. graphically. The new plans had new rib bottom of the ribs. The tips of the But I couldn’t let such a beautiful thing spacing because the spacing on the old stabilizer wre laminated (see photo). die. plans was too far apart. The leading edge of the stab was aligned I got a large roll of graph paper and, I had a lot of work ahead of me and I and glued on. The leading edge of the using a photo enlarger, I drew from the was looking forward to every minute of elevator was planked with 1/16 x 1/8 original model a set of plans (not know it. balsa. A 1/16 inch trailing edge sheet was ing I could get them from John Pond) Stabilizer glued on the top and bottom of the ribs. and built an R.C. version of the Thermic To make sure that I could handle the The ribs were cap stripped with 1/16 x 70 with KPS 18 servos, two-channel construction, I built the stabilizer and 1/4 balsa. Hinges were glued in place receiver and battery. elevator first. I used an NACA 009 and the stab and elevator were ready for The silk-covered model weighed one symmetrical airfoil. Litho negs copied sanding and covering. pound and flew like a dream. from an old Air Trails were enlarged to Fuselage Then a friend crashed his Thermic 50 match each station on the stabilizer. I used basic box type construction out and one of the wing ribs was crushed Each print of each rib then had to have of 3/8 inch square hard balsa. Since the beyond repair. Doc Van Deventer sliced lines to indicate the placement of the balsa was not long enough and had to be a popsicle stick into 1/16 inch strips and 1/8 inch balsa diagonals, uprights, top of spliced, I used long diagonal cuts to made a built-up rib, and the Thermic 50 rib, bottom of rib and spar placement. ensure there would be a large enough was airborne again. The construction of the stabilizer ribs glue area for strength And I got to thinking, what if a glider went smoothly with two ribs to each After completing and aligning the had all built-up ribs... pattern. box, the top formers were glued in, the It was the beginning of a big idea. And The stabilizer spars were made by top of the nose was planked, and the I was hooked on model airplane build laminating 1/8 inch basswood on each nose block glued on. ing again. side of the 1/8 x 1/4 balsa. These were Building the Thermic 210 fitted into the notches on the top and Continued on page 68 Root rib and spar plugged into fuselage. Note 1/8 plywood bulkheads Spoiler in open position. Control rod goes direct to servo . . no for wing center section. springs, rubber bands, etc. Well thought out. SEPTEMBER 1982 19 Overall setup of Quasi-governor, discussed in text. Modified bell- Quasi-governor (sounds like a derogatory political term) in idle cranks are key to linkage required. Basically a mixing unit. position (feet on desk?). CHOPPER CHATTER By RAY HOSTETLER PHOTOS BY THE AUTHOR • This month is going to be specifically hints that you have found useful, or speed in all attitudes, ascents, and for advanced intermediate to expert black and white photos of your latest descents. Flying a governor controlled pilots in application, but for everyone in helicopter. I’d be happy to expand the machine is a pure pleasure. Control feel theory. column to include more of this general is the same in all areas during flight. For But before I start I’d like to makesome material. Just write to me c/o Model instance, you don’t have to put in extra comments on past and future material in Builder Magazine, as my address cyclic control during descending turns the column. First, I’d like to thank those changes a lot lately and MB should know as you normally have to when rotor rpm of you who have called or written in my current address. I hope to hear from decreases to come down. And collective response to the previous columns. Your you soon. control is more precise because lift is support is appreciated. I must apologize This month will be the last of a series of directly regulated by blade angle. to those of you who felt that some of the “ technical" articles. In the months to On top of these advantages, I feel the articles were too difficult to under come. 1 hope to cover some of the basics main advantage offered by a governor is stand. I try to make you think about it in of helicopter flight, set-up, and trim the ability to descend quickly and theory and then apply it to actual ming. smoothly in any amount of wind. modeling. (I think one of the best series For now, an expose' on governors, COLLECTIVE NOT ENOUGH illustrating this philosophy was the set of and a specific design of a mechanical Even with a collective pitch machine, articles on blade balancing.) If some way to hold your rotor rpm as constant collective pitch is half the answer. Why? thing is not clear to you, or you’d like to as possible. Well, as you start to descend to a typical see a particular subject discussed, please The definition of a governor is simple. approach from forward flight, collective drop me a note and let me know. It is a device used in collective pitch pitch comes out, and throttle decreases. Also you are most welcome to send in helicopters to maintain a constant rotor This is O.K. for slow, shallow descents Q-G in lift-off position. Pushrod on inner arm has been pulled for With rotor speed more constant, you'll need more collective throw ward, adding enough throttle to go from idle to lift-off. for crisper response. Extension arms added to author's Super Mantis. 20 MODEL BUILDER with no wind. When you really want to throttle as the rotor speed dropped off, a governor in the true sense of the word, come down quickly, or come down with aggravating the overheating engine. but it does everything very similar to a a strong wind, you have to come way A powerful engine has always been a true governor. back on throttle/collective to get the necessity for a helicopter, and I would The Quasi-Governor even has a few desired response. really stress this point for those of you advantages over a governor. Because it is Most all of the collective will come just getting into R/C helicopters. Buy a mechanical unit it has no "lag time" out. This is good as it gives loss of lift. the best engine you can get for your where the engine falls behind blade Unfortunately, most of the throttle particular helicopter, you won’t regret speed and has to catch up. (As collec comes out too, and herein lies the it. (Your local experts will be happy to tive is applied throttle opens up at the problem. As you pull the throttle/ advise.) same time.) And if you should be unfor collective all the way back, the rotor Anyway . . . with the Tach-Tron, a tunate and set your engine too lean, the speed wants to stay the same, or maybe powerful engine was definitely needed. Quasi-Governor will not open the even increase at times, while the throttle For instance: If given a quick vertical throttle more and make things worse. is being pulled back to an idle. ascent, the rotor speed would fall off just The basic approach to the Quasi- To regress a bit, most of you probably slightly until the governor picked up the Governor has been developed from my think in terms of the engine controlling rpm loss. Then the engine had to have experience and desire to have a rela rotor speed. During the descent period, enough power to bring the rotor speed tively simple unit. You need an auxiliary all of this turns around and now the back up, and then continue to keep the lever or switch on your TX, an extra rotor is trying to control the engine. rotor speed for the rest of the ascent. servo, and two 90 degree nylon bell- And it succeeds in doing so. In other This last example can be compared to cranks (Airplane aileron style, I used words, during the quick descent, the driving a car and seeing a steep hill Kraft. ..). throttle barrel is nearly closed, yet the ahead, but not adding gas until you’ve QUASI-GOVERNOR INSTALLATION rotor demands the engine to run at an started to slow down on the hill. Then. Photo #1 shows the overall set-up as it Photo illustration of Fig. 1 below. Throttle arm positions shown for (I to r) idle, hover, and full open. Check this against the sketch. rpm which would ordinarily be closer to unless you have a powerful automobile, is installed in my Super Mantis. One arm one quarter to one half throttle. it’s too late. Even with the pedal of each bellcrank is cut off, leaving only Because of this condition it becomes a “ floored” the car will not regain speed. the bushed arms that you see. The inner trick to set the idle/midrange adjust It will continue up the hill at a slower “ bellcrank” is screwed to the side- ment correctly. Tune for a smooth idle rate. I’m saying that a true governor frame, or any solid mounting area you and descents may be rough, or vice can’t anticipate a climb. It can only might have on your ship. The pushrod versa. Therefore the second advantage compensate once it has started the from the auxiliary servo runs to the of a governor is that it allows the engine climb. bottom of this arm. to stay open as necessary during de AN ALTERNATIVE Then the outer bellcrank is screwed to scents. The rotor speed and the engine What I am showing you is something the upper hole on the inner bellcrank. no longer fight each other. I’ll call a Quasi- (false) governor. It is not The throttle pushrod runs to the bottom GOVERNOR HISTORY of the outer bellcrank. The upper hole A few years ago, Al Irwin designed and on the outer bellcrank runs to the produced an electronic rpm sensing RELATIVELY LITTLE throttle barrel itself. governor, the Tach-Tron. It "read” OPERATION revolutions of the rotor shaft from a Essentially the whole thing is a little wheel attached on the main shaft itself. mixing unit. Photo #2 shows the unit at As the governor detected increasing or idle. As the auxiliary lever on the TX is decreasing rpm it would close or open advanced to lift-off rpm, (flat pitch- the throttle servo as necessary to hold collective full low), you get photo #3. the specific rpm you had set up. The only thing that has happened is that The unit worked very well but it never the pushrod on the inner arm has been really had the popularity it deserved. pulled forward. This adds enough One of the reasons was that it was a little throttle via the mixer to go from idle to too sophisticated for the average guy to lift-off rpm. set up, install, and adjust. And if you As you increase throttle/collective weren’t careful and set your engine too lean, the governor would open the Continued on page 68 SEPTEMBER 1982 21 Interior shot of Bob Hamilton's Decathalon. Note leather seats, Interior of Randy Getchell's J-3 Cub. Makes you feel right at home. charts in side pocket. Flies as good as it looks. Both photos by Randy Getchell. 6) Birds with the prop up front are more stable when the engine’s stopped. 7) High wings and swept wings have a greater effective dihedral. More dihe dral helps roll stability, but watch the fin size (see #5). Drooped stabs (now popular on pat tern birds) decrease the total effective dihedral, unless you fly faster than the speed of sound (this I gotta see). 8) Long, skinny strakes, usually blended into the vertical fin (a la Cessna 172), are effective at high yaw angles and work well as an aid to quicker spin recoveries. • Thought you might be interested in 3) Changing the angle of the hori Horizontal strakes (see Tiger Moth this little collection of stability rela zontal stab has no effect on pitch wen) aid stall recovery; and not too tionships authored by Gregg Lovick, a stability. It will, however, change the surprising that strakes will also ruin snap member of the legendary 114th R/C speed at which the plane tries to fly rolling capability. Auto Squadron based in Grapevine, (don't try to argue this with me until 9) The entire aft fuselage contributes Texas. This list should be good for you’ve checked it out). to effective tail area. “ Box” fuselages sorting out new BIG Birds, winning bets 4) Moving the balance point forward contribute more than rounded ones do. ... and wrapping fish. increases pitch stability, but going too Fuselage area ahead of the balance point 1) Raising the thrust line with respect far can cause other problems. is detrimental to stability. Adjusting the to the airplane's CG . . . either by raising 5) Increasing the size of the tail relative depth of the fuse at each end the engine or adding downthrust . . . surfaces generally improves stability. can cure roll and knife edge problems. increases pitch stability. Increasing vertical fin size can cure Well, there you have it .. . the mak 2) High wing airplanes have better “ Dutch Roll" (tail wagging), but adding ings for some good arguments. Let’s pitch stability than low wing planes if too much fin without also increasing the hear how you feel, especially if you’re you fly at high angles of attack; the wing dihedral can cause “ spiral diver violently opposed .. . and why. And if reverse is true at low angles of attack. gence” . . . a tendency to roll out of you don’t know enough to ask any This is why slow trainers use high wings straight flight into a tightening spiral questions. . . ask them anyway; that way and fast birds use low wings. dive. we can all learn something. J-5 Enterprises Stinson, Quadra powered, w ith (I to r) John Pasersky, Tony Della Vecchia and his Quadra powered Big Stick, at Bob Palmer, and Charles Bevilacqua, at Philly Navy Yard. Philadelphia Navy Yard. Member of Flying Squires club. 22 MODEL BUILDER Robin McGeorge, Dallas, put a lot of detail into his Cessna Sky- Super Sun Ray by Ron Magnum. Plans available. See text for info. hawk from Parker kit; all lights. Fowler flaps, air brake. This one is Kioritz powered. RESPONSIBILITY shop honcho was well aware that he had minimum. We can’t let a few idiots, or It’s a big word, with an equally big a time bomb hanging there. He knew money-hungry hawkers, ruin it for meaning. Unfortunately, too many of us the Cub's airframe was indequate for everyone else . . . because whatever shirk ours . . . or try like hell to ignore it. that big gas engine, which meant that ground we lose will be lost forever, and Because our BIG Birds can be so the poor unsuspecting buyer would we’re liable to find ourselves squeezed lethal, on the ground as well as in the air, probably get a face full of running Roper out of existence. ignorance can never be bliss . . . and an . . . or that innocent spectators and/or ARE WE BLIND? uneducated R/C type is bad news for other flyers were gonna have to dodge I just can’t believe the kind of idiotic everyone, including himself. And when pieces of falling airplane or a whole, thinking that goes on within the AMA. an accident does happen, everyone in uncontrolled BIG Bird shortly after For an organization that keeps telling us the hobby is adversely affected. . . be he takeoff. But he preferred not to get how important safety is... and it is... flyer,builder,hobbyshop owner,manu involved since the Cub belonged to they come up with rules and standards facturer or distributor. So, in a sense, we someone else and he was trying to help that are directly opposed to good safety all have a vested interest in seeing to it get it sold by letting it hang in the shop. practices. They've set us up for a bad fall, the SAFETY IS ALWAYS THE PRIME By nature I tend to be an emotional and the incredible part of this is that CONSIDERATION. gut-reactor, and this particular situation we’re thanking them for it. Are we What got me onto this “ safety soap made me about as angry and frustrated blind?????? box” was a situation I ran into a few as I care to get. I did try to contact the What I’m specifically referring to is the weeks ago while browsing through a guy who built the bird, but found he was recent change made to AMA standards hobby shop and noticing a completely away for a while . . . so in order to feel for BIG Birds. Because of an enviable framed-up Balsa USA Cub for sale. This like I was doing something construc safety record these past few years (in bird had been built stock, which in this tive, and since I felt very strongly that the spite of all the dire predictions by so- case was appalling since it had a 3.7 end fully justified any means, I restored called “ experts"), which was due largely Roper bolted to the firewall. Like so to bad-mouthing that Cub as often as I to the IMAA mandatory airworthiness many of the earlier Nosen kits, this Balsa could. The odds are that even if whoever inspection and insistence upon absolute USA kit was not designed to stand up to buys it doesn't hurt himself or anyone safety, the AMA made it legal to use the pounding and vibration of a gasoline else (only by some miracle), the im engines up to, and including,a displace engine; it needs a lot of reengineering minent destruction of the plane, engine ment of 4.44 cubic inches. and beefing up before it’s suitable for and radio will convert him into a stamp Fine! I applaud that decision because anything else other than a methanol collector or an inveterate boob-tube it gives us "a little more room to work burner. And yet there it was, hanging in watcher pretty damn fast. in.” But I’m also glad that no aircraft all its stock naked glory, just waiting for There’s no taking without some giving weight limit was set because that in itself some unknowing and naive neophyte to back; so those of us who have our heads would mean nothing. What we do need, make it his entry into our beautiful screwed on right owe our hobby what however, is a maximum allowable wing world of BIG Birds. ever time and effort it takes to keep the Having been into biggies, the hobby aforementioned kind of prostitution to a Continued on page 69 Another shot by Randy Getchell of his J-3 and Bob Hamilton's The Ultimate ego trip? Read about it in the text. Decathalon. Lots of realism there. SEPTEMBER 1982 23 The greater the degree of these two unwanted happenings, the less power the engine will produce. That is concisely the paramount problem for two-cycle design engineers. All they’ve been trying to do since the later 1800’s is design transfer and exhaust systems that would clear out all burnt gases with no Laguna Hill», CA 92653 loss of fresh mixture! Efficient scavenging! Would you believe that in all that PORTING engine so important? An oversimplified time, and with all those engineers, today Following through with one of the answer is that they must be about twice there are only two basic designs in use: closing comments from the August as efficient as the valve system of a four the cross-flow and the loop-scavenge column, the subject this month is port cycle engine. The cycle of a four-stroke system? The cross-flow came first, and ing. In a two-cycle engine, the funda engine begins with the piston at the top mental purpose of the ports is to enable of the cylinder and the intake valve fresh fuel-air mixture to enter the open. As momentum moves the piston combustion chamber, and after burning, on a down stroke, pressure inside the to let it escape. The intake and the cylinder is lowered, and a fresh fuel air transfer (sometimes called bypass) ports mixture is pushed past the intake valve accomplish the former. Theexhaust port by the higher outside pressure. Next, as is the escape door for the burned gases. the piston begins an upward stroke, I'm not trying to be nonchalant by using valves are closed and the fresh fuel/air the term door. Window is another good mixture is compressed. Near the top of word to help in understanding ports. the compression stroke, the mixture is Doors, ports, and windows all can be ignited and burns. Burning raises the opened to let something in, they can be temperature and pressure, and the closed to keep it in and to keep other piston is pressed downward on a power things out, and they also can be opened stroke. At the bottom of the stroke, the to let something out. exhaust valve opens,and the momentum Similarly, in four-cycle engines, there from the power stroke carries the piston are intake and exhaust valves. They upward, thereby forcing the burned perform the same functions as two-cycle gases out through the exhaust valve. At transfer and exhaust ports respectively. the top, the exhaust valve closes, the There is no door or window on a four intake valve opens, and another four- cycle engine that corresponds to the stroke cycle begins. Thus, burned and intake port of the two-cycle. This is also a fresh gases are physically separated. logical place to add that I will not deal Since the former cannot contaminate with two-cycle intake ports in this the latter, the effect will be a good burn Vertical cross-section of a sleeve with original article. It’s simply too much to try to and power stroke. Unfortunately, this twin-style Schneurle transfer ports. adequately explain all three portsinone tidy arrangement is at the expense of column. Although it may seem like only one power stroke for every 720 utting the so-called cart before the degrees of crankshaft rotation and essentially consisted of exhaust ports on orse. I'll describe transfer and exhaust about three times as many moving about one-half of the cylinder wall and ports this time. Their operation is con parts as the two-cycle engine. transfers on the other half. The shortfall trolled similarly, and they are what On our two-cycle engines, there is a of it was that too much of the fresh people usually first think of when ports power stroke every 360 degrees of mixture tended to go right across the top are mentioned. Next month, it will be crankshaft rotation. The movement of of the piston and out the exhaust. To the intake system and ports. the piston opens and closes the transfer prevent this, piston crowns were shaped BASICS and exhaust ports, thereby significantly to direct the incoming mixture up Why are the ports on a two-cycle reducing the number of moving parts. It towards the top of the cylinder. In our is simple, lightweight, and produces a lot of power, although it is quite a bit noisier Continued on page 73 and less fuel efficient. However, as we shall see, the high performance of the two-cycle is very much dependent upon the efficiency of the ports. During the latter part of a power stroke, the piston uncovers the exhaust port(s) so that the burned gases can escape. Very shortly thereafter, the piston unmasks the transfer port(s) to allow a fresh mixture to enter the cylinder. This exchange is often referred to as scavenging. Technically, clearing the burned gases is scavenging, and introducing fresh gases is charging. However, since the latter aids the for mer, the single term scavenging is commonly used. The piston then moves upward on a compression stroke, and another cycle is ready to begin. Neat, huh? Unfortunately (again), all of the In cross-flow two-cycle designs, incoming burned gases don’t clear the cylinder, Horizontal cross-section depicting flow of gases are deflected upw ard b y a piston and still worse, some of the fresh incom fresh gases through directional transfer port, baffle. ing gases scoot out through the exhaust. looping up and over in cylinder. 24 MODEL BUILDER ELECTRIC BRIGADIER By MITCH POLING ... Our "Electric Power" columnist intro duces a famous early post WW-II design by Bill Effinger, kitted by Berkeley, that is a perfect match for the latest in model aircraft power . . . electric motors. Sandra Smith Poling, M.D., with husband Mitch's electric powered Berkeley Brigadier. • The sun shines through the covering have a plane that has a free spirit of its I use the thick cyanoacrylate through of the old timer as it cruises by, and then own, and appeal, and superb flying out construction, except where other it slowly turns into the field. It gently abilities, try the Brigadier! wise noted. Note on the plans that the settles in, almost hovering, like a bird in The construction of the Brigadier is a spars are tapered upward at the tips, use flight, then touches down in almost little simpler than the usual old timer, the plans to get the right angle. Cut the dreamlike slow motion. Suddenly there especially the wing, which is very simple tip pieces from 1/8 balsa (about one is applause from the field, the fliers and indeed, with only a leading edge, solid ounce for a 3x36 piece), then assemble spectators have been captivated by the spar, and trailing edge. Let's start with the wing. Once the glue has set, remove beauty and the sheer class of the experi the wing first, as it is so simple. Cut the ence! The Berkeley Brigadier does that ribs from 3/32 sheet. I always keep track to you, and does it every time! It can’t of the weight of the balsa; a 3x36 sheet of help it, as the song goes, and it just 3/32 balsa should weigh about 3/4 comes natural, just like anything that is ounce. After the ribs have been cut, just perfectly right. stack them to be sure that the spar The Brigadier has class, and it shows notches and the leading edge notches on the ground and in the air, perhaps line up, and that the trailing edge is the "charisma” is a better word, for lack of same length on all of them. Cut the any other. But, its talents don't stop notches in the trailing edge with an just there. It is competitive, having won Xacto saw. The notches are quite impor first place in every electric old timer tant; they make the wing assembly much contest I have entered. It can fly itself, easier, and strengthen the rib to trailing once a rudder servo failed, and it flew edge attachment, which really helps overhead until the motor ran down, when the covering goes on! The leading then made a perfect landing just at the edge is just a 1/4 square balsa or spruce end of the field! It is a perfect trainer; I length, set on edge, like a baseball taught my 11-year-old nephew to fly diamond. Round the edge that will face R/C on it, and after he had soloed after forward a little, I use an emery board (for two flights, he said, "Gee, this is easy!” fingernails) for this. A lot of rounding Right, if you are flying a Brigadier! It isn’t needed, I just take off the sharp loves thermals, it will turn into one and edge. The spar is 1/2x1/4 spruce. This stay there until you insist on it coming size is sometimes hard to find, so you can back. In fact, at times I feel like I’m glue two 1/4x1/4 spruce lengths interrupting its business, and I’ll let it fly together to get the same result. Bass Electric 05 motor blends nicely into Brigadier free, with just a little rudder trim for wood should do as well, but do not use cowl. Patch on top is result of installing new gentle circles. So, if you would like to balsa, it could fail under stress. motor tube. Brigadier gets "refueled" through Leisure Electronics digital charger, Basic structure of the Brigadier is exceptionally simple. Original from large battery infield box. was Berkeley free flight gas model kit. SEPTEMBER 1982 25 2 6 FULL SIZE PLANS AVAILABLE - SEE PAGE 96 MODEL BUILDER Mitch gives his Brigadier the old heave-ho for another silent Underside showing how landing gear is plugged into slot in fuse powered flight. lage, allowing easy straightening if needed. •A, Two-channel system is used, with down elevator to operate push-on, push-off switch to Tape keeps gear from spreading, provides electric motor. snug fit in fuselage slot. the wing from the plans and glue a 1/8 spar. Put three turns of nylon tape this. The tape can pull quite hard on the plate over the root of the wing, and trim around the tubing at each end of each covering if you want to take the wings it to the outline of the root rib. This will rib bay, secure the tape with glue apart later, so I use three bands of tape, reinforce the root rib against the pull of through all the wrappings. I use the Carl one for each wing root, and the one the covering. Now drill a hole through Goldberg nylon tape, 3/4 inch wide, around the center. The tape bands on the first two ribs just under the spar, item 264, and it works very well. Build the wing root are permanent, and save using 1 /8 1.D. aluminum tubing. Sharpen right wing panel in the same manner, the covering from wear and tear. I do the tubing by running an exacto knife shifting tip to other end. not slant the wing root ribs on my around the inside edge, then put a few Cover the wing, the bottom first, then planes, so there is a small gap at the top nicks in the edge for “ bite.” Hold a balsa the top. I used transparent red Solarfilm of the wings where they are pushed block behind each rib as you drill by for its dramatic effect. The top and together, but the tape hides this per hand (not with an electric drill) to take bottom were done with one piece each, fectly, and it has no effect on flying. up the stress. Cut a length of the alumi including the wingtips, which are easyto Check the wings for warps, I use about num tubing as long as the first two rib do if you pull on the covering while you 1/4 inch of washout in each tip, that is, bays, and glue it to the underside of the apply it. Cut and bend the wing dihedral with the wing root flat on the table, the wire from 1/8 music wire. Assemble the tip rib trailing edge should be about 1/4 wings by sliding the wire into the wing inch above the table, and the entire tubes and pushing the wing panels leading edge should be flat on the table. together. Do not glue them, there is no This is not especially critical . . . what is need to, and the take apart feature is important is that both panels should very handy. Run a band of tape around have the same washout, and that there is the center joint to hold the panels together. I use 3/4 inch vinyl tape for Continued on page 73 Fin and stab fit into slots in fuselage, for A ft end of fuselage showing alignment and mounting slots, and control pushrods. Single consistent alignment. screw into fin-post retains tail surfaces, permits demounting for easy transport. SEPTEMBER 1982 27 The Astro 05 Challenger cobalt motor, a super Boeing Hawks 05 Pylon racers (I to r): back; Don Shepard, Bill Warner, Bill Smith, and Dave performer with a tremendous amount of power. Katagiri, front; Mitch Poling, Ben Almojuela, and Bernard Cawley. £ELECTRIC POWER By MITCH POLING < ^ • Recently there was an article on the trail, there would be ascending rings, had never been yanked along so fast in European electrics in Model Aviation stacked one above the other. Neat! This its life! (June, 1982), and since then I have been is on six Sanyo cells, and after about five The Boeing Hawks are starting 05 getting questions about them, mostly on minutes of flight; not hot off the charger. pylon racing here, and I wouldn’t be at the order of: "Why don’t we have I usually get about nine minutes of flight all surprised if this motor does 70 mph anything like this?” The answer, up till on the Cardinal with a 6x4 prop, with on six cells in a pylon racer. On eight now, has been simple, the Europeans three offs just to keep the plane from cells, in an unlimited race design, I think have cobalt motors and we don’t, period. getting too high. A more efficient plane, it could do 90 mph. This has now changed, and how! Astro such as the Astro Sport, should easily fly The specifications for the motor are: Flight now has a complete line of cobalt well over ten minutes with this motor. 13,500 rpm on a Cox gray 6x4 on six motors, in the 05,15,25, and 40 sizes, and Besides the high power-to-weight Sanyo cells at 14 amperes; 15,000 rpm on at prices below the European motors. IF ratio, the other advantage of cobalt the Cox 6x4 gray on seven Sanyo cells at the Challenger 05 (cobalt) is typical of motors is that they can handle a very 18 amperes; and 16,500 rpm on the Cox the Astro line, wow! I have one, and it's large variety of props and battery pack, gray on eight Sanyo cells at 22 amperes. so potent that the poor old Cardinal so you can really tailor your power to the You can use up to a 7x4 on eight cells, foamie that I’m using it in is pushed to its plane. The Challenger will deliver super and up to a 7x6 or 8x4 on six or seven limit. Would you believe, climbing performance on six cells, and it will also cells. The 8x4 will turn at 12,300 rpm on loops, loop after loop? It’s neat, I pull take seven or eight-cell packs. I’m seven cells, this is as good as the early back the elevator (level flight, cruising chicken to try eight cells; I used seven model Astro 15! The motor itself is a speed), and the Cardinal is yanked cells in the Cardinal with a 6x4 prop,and beauty, all finely machined, with very through a loop as fast as it can follow. the plane couldn’t handle it. The wings heavy duty brushes, and an armature Just keep the elevator stick back, and started to flutter, in level flight! In order that has to be seen to be believed. It is another loop, but this one is higher, and to save the plane, I had to land after a seven pole, in fact, it is an Astro 15 the next, and the next. If I had a smoke couple of minutes. The poor Cardinal armature. This, in a case that is smaller Bernard Cawley with his Ohm-Y-Uosh, designed by Dave Katagiri. John Sczarz uses 20 amp G.M. "spade lug" fuse, with spade lugs We'll have plans in the near future. soldered to wires. See text for more about this. 28 MODEL BUILDER than a regular 05! Electrics have come a long way! The motor weighs just under six ounces, and if you build up the diameter with shims or tape, the regular 05 radial mount works just fine. The motor shaft is a hefty 5/32 diameter, much more than a regular 05, which I appreciate, since the motor shaft is usually the most vulnerable part of the motor. I think you would have to hit concrete to bend this one. The motor is also available with the Astro Flightspeed reducer; with that and a folding prop, you could take your glider or old timer up at about a 45° angle! I think the Challenger series is well named, they will challenge a lot of old Bill Gilchrist's Franklin Sport is Astro 15 powered, with reduction drive. Plans also coming for ideas about electric flight. The prices are th is one. $75 for the 05, $100 for the 15, $125 for the 25, and $150 for the 40. These prices Cox prop. Well, next time. Second was spade clips. This is quite small, most fliers are quite a lot lower than the equivalent Ben Almojuela with an Ohm-Y-Gosh, have it right at one end of the battery European motors, and the manufac Leisure race wind, at 2:50; third was pack, directly off the positive or negative turing quality is so high that I think a Bernard Cawley, with an Ohm-Y-Gosh, lead, and it tucks right into the battery motor will last for years, even if abused. Reedy car motor, at 2:46 for 10 laps, but pack. The 20 ampere fuse works best for I’m really impressed with mine; the he had a cut, so went for 11 laps at 3:03.1 the six cell packs. more I fly it the more the possibilities it later tached his motor at 12,000 rpm on Last month I mentioned how good the opens up, and I recommend it very the Cox 6x4 gray prop. It all goes to Astro Sport is; it is the best, as far as I highly. As soon as I get the cash, I’m show, at least at this stage of the game, know, of the sport planes for the 05. going to order the 15; that should really that how you fly matters more than what Unfortunately, I lost mine this month, be a goer! motor you are flying. This event looks and wiped out a motor too, so watch The really neat thing about these like it’s going to be a lot of fun, try it! out, there can be a flaw in the wing. I got motors is the feeling that there are no Hopefully, Dave will publish his design a balsa spar in the kit I built (I understand limits on what you can do with them; up soon, it has an especially designed airfoil that has been changed), and I built it "as till now motors had to be used just so, that is quite impressive, with lots of lift in is.” To make a long story short, the wing with such and such a prop and battery, the turns, but no ballooning or excess folded, in level flight. If you happen to and nothing else. You get the feeling climb in the straights. The name, by the get a kit with the balsa spar, I strongly with the cobalt motors that you can try way, was invented by Bernard's wife, recommend that you get a spruce spar just about anything, and get away with it Avis, who obviously knows how to turn a instead. It could save you a lot of money (don’t tell Astro Flight this!). For more pun! and frustration! The other "fix” that the KRC club does is to use the balsa spar, information, write Astro Flight, 13311 The fuse rule was promoted by John Beach Avenue, Venice, CA 90291. but they make the plywood dihedral Sczary, with good reason. The purpose is I mentioned that the Boeing Hawks piece much longer, about two rib bays to save spectators, not the motor. If are doing some 05 pylon racing, two long on each side (six inches, both sides) there is a fly away or crash, the fuse will demonstration races so far, and a "for to reinforce the spar. This works well, stop the motor, which can be very real” race on June 27 (this is being too. The Astro Sport flies so well that important, as Ben Almojuela can testify. written in May). The rules are quite there is no way you can resist the urge to He got his wrist in the way of his prop, simple, the usual 1/2A pylon course of a "wring it out,” so make sure you have a and got several bad slashes. These triangle with two 300 foot legs, one 60 spar that can take it! electrics can bite! The 05s are running Bill Gilchrist (Oskaloosa, Iowa) sent foot leg, 290 square inch minimum wing near a tenth of a horse, and that can do a area, 7/8 inch minimum wing thickness, me some more photos of his projects (a lot of damage. John’s fuse setup is really minimum fuselage 2-1/4 x 3-1/2 inches, few months ago I ran some of his Cub), good, and has been used by most of the and a six cell power pack. A fuse is and the latest are enough to make me go 05 pylon racers here. It uses a spade lug required for the motor, and an on-off type automotive fuse (I think it isGeneral control. Con tinued on page 76 Dave Katagiri’s design, the Ohm-Y- Motors), which clips nicely into female Gosh, is quite popular, in fact, other than an Astro Sport and another original design, all the entries (seven) were Dave's design. Dave drew it up just for this event; it flies well, and the fact that you could talk Dave out of a plan for free didn’t hurt either! The best time for the course was 2 minutes, 17 seconds, by Dave, for 10 laps, which comes out to about 50 to 55 mph. Dave was using the Leisure race wind motor and six Sanyo sub-C cells. We tached Dave’s motor later, and it turns a Cox 6x4 at 12,800 rpm, quite respectable. I raced two planes, the Astro Sport with an Astro 05 XL, and the Ohm-Y- Gosh with a Leisure pattern wind, and wound up with a solid last place, I tied myself for last! This goes to show that just maybe I fly the course a little bit wide, since the 05 XL turns almost as fast Bill Gilchrist's 1/5-scale Velie Monocoupe from RCM plans, modified. Astro 15 with 3:1 as the race wind, at 12,500 rpm on the reduction drive. SEPTEMBER 1982 29 The Top Flite J-3 looking very realistic on a fly-by. Pilot just About all that's needed in this view are the shock covers on the happened to be tieing his shoe at the moment. landing gear to complete the real-life image. problem with any of the materials (you Master' to good advantage to match the ten percent fuel and foundconsumption might want to watch where you use the various angles of the parts during fuse to be about 12 plus minutes on an 8- hard and soft longerons) whatsoever. lage and tail feather construction. Five- ounce tank. This engine is powerful The ply die-cutting was super and the minute epoxy. Hot Stuff, and Super-T enough to allow climb-out at about a 30 parts fit quite well to make a very strong adhesives speeded up construction. I degree angle, and for a plane of this size and light cabin/fuselage structure. Bear sure wish they had been invented twenty and weight (five pounds all-up), who in mind that model construction closely years ago, as it allowed me to build a needs more? If you're a fanatic about follows the full size Cub’s internal rather intricate scale model in only six scale appearance and want to install layout. The designer of this kit must have weeks of spare time. dummy cylinders on the cowl, I’d sug been brilliant to develop the cabin One of the very few modifications I gest inverting the engine for a cleaner section and its related parts, along with a made was to use Du-Bro's ‘Ball-ends' for appearance. The Irvine .30 was fitted unique wing attachment and adjustment attaching the aileron pushrods to the with a long Du-Bro muffler which is concept. The wings can be adjusted for aileron servo wheel. This makes assem concealed by the cowl, except for the wash-in/out or to counteract warps that bly and break-down of the model simple exit out the bottom for a neat and clean might sneak in and to fine tune dihedral. and quick. Other than that, the Cub was installation. _ The use of dowels for parts of the built right to the plans. The formed cowl Continued on page 77 fuselage structure adds considerably to presented no problems, other than its strength and scale appearance after deciding which muffler to use with the covering. I used a Fourmost ‘M iter Irvine .30 to minimize cutting up the cowl. The kit calls for a .35 to .50engine,and originally, I had some misgivings about installing a .30 in the nose of the Cub. I think the boys at Top Flite were con cerned that some of the older .30's around might not have quite enough poop to pull the bird off a grass flying field. The new Irvine .30 R/C engine, imported for distribution by Midwest Model Supply, was side-mounted in the Cub, and I want to tell you there is no lack of power in this workhorse! I ran it first on the bench for about one-half hour, it started on the third flip, had excellent throttle response and was as The author making an inspection pass at Mile smooth as anything I have owned, Strut attachments and aileron bellcrank all Square Park, Fountain Valley. CA. especially for a brand new engine. I used occur in same rib bay. The author poses for the typical "me and my airplane" shot. Futaba Irvine .30 R/C engine, from Midwest Model Supply Co., was more radio is his favorite. Buzz Box described in text. than adequate for powering the Top Flite J-3 Cub. SEPTEMBER 1982 31 The author coaching Phil Scarborough on his Phil Scarborough retrieving his Gentle Lady from its first student/instructor landing, first flight ever, at Torrey Pines. obviously a success! stant altitude. First, we made large circles (low bank angles); then we made tighter circles, just to "get the feel of it.” My job was to discourage over-control R/c SOARING and pulsing the stick. By Dr. LARRY FOGEL We then worked on pitch control: stall recovery, and finally, performing circular loops without ballooning. The boy absorbed it a ll. . . and wanted more action. ‘‘ Let’s fly upside down. Let’s • It’s great to launch your sailplane into training for the new pilot? Well, that was make it spin!" I dragged out the old saw an empty sky . . . and even better to completed in the half minute it took to about ‘crawl before you walk; walk share this pleasure with others. But walk from the test flight area to the edge before you run . . . and all that jazz. perhaps the greatest joy grows out of of the slope. You see, Phil really wanted In our next flying session we reviewed introducing a newcomer to our to fly ... not contemplate what consti what he had learned. I then felt confi addiction. tutes a stall. dent enough to stand aside while he One Sunday afternoon at Torrey We went through some simple flew solo. That was my first chance to Pines, Phil Scarborough approached maneuvers with the plane out in the lift meet Phil’s father. I started to explain me. This eleven-year-old lad had just and my hand guiding his thumb on the why the plane banks even though the finished building his first sailplane . . . a control stick. I pointed out that you rudder directly produces only yaw .. . Gentle Lady. It was a fine job. I checked initiate turns with rudder and carry only to learn that Daddy is a senior it out, adjusted the balance, the amount through with elevator. To prove this we American Airlines pilot. of throw in the control surfaces, gave it a made a rudder-only turn ... right into a “ Do you want to try the controls?” short test glide, then threw it off the cliff. spiral dive. We then practiced turning in “ No,” he said. "I'll wait until Phil can Hey, what about the required ground each direction while maintaining con teach me.” Man's best friend goes for a hang gliding flight, riding . . . er, John Laycock launches his pulse rudder-only "Feather" at Torrey doggyback with his master. Is it a first? Pines. Flying rudder-only is a challenge in altitude control. 32 MODEL BUILDER We then started to practice landing. The trick is to fly the landing pattern so that you "land" about thirty feet above the desired point. You fly in the slope lift, starting the downwind leg about a hundred feet from your point on the edge. Turn on to the base leg as you continue to lose altitude, then turn on to final approach as if you were thirty feet lower. Now fly past the edge so that you’re again in the lift. You climb as you proceed back to the point where you initiate another downwind turn. I told Phil to repeat this training pattern until he became proficient or I wore out. He won! Next step .. . a real landing. Now is the time to get serious. It’s important for the student pilot to expect low altitude turbulance and to appre ciate the importance of keeping a slightly nose-down attitude to prevent the classic downwind stall. The plane seems to be going too fast on the downwind leg. You’re seeing airspeed No. this doesn't belong in Dirty Dan's column! R/C Voodoo slope gliders by (I to r) Don plus ground speed, so it’s tempting to Teason. Bill Slining, and Ron Leon. Please, fellas, don't try Rat Racers! haul back on the stick. The plane slows way down, and before you know it, it wet around a pool cue. The entire I’m not clear on what causes this condi stalls at too low an altitude to recover. fuselage is then covered with Japanese tion on flat land. In any case, the circula The final approach seems oh so slow tissue and two coats of dope. I asked tion was so intense that the other (airspeed minus ground speed), espe about his plans for this "feather.” sailplanes left the area. I entered in the cially with time being stretched by the "Well, I might convert it to two hope of rising on this circulating column pilot’s greater concentration. Here the channels using micro servos, but for the of air. temptation is to increase the airspeed, moment, this single-channel rig is a "The problem was to maintain a but you’re so close to the ground that it sufficient challenge.” From my point of suitable position in the narrow cone of looks like a short landing. It's like view, it’s too much of a challenge. greatest vertical velocity; that is to say, walking a narrow line. And remember, ★ ★ ★ remain in the lift zone. The usual tech the lower the airspeed, the less sensitive Some things come in two’s; others in nique of applying trim or back stick the controls. three’s. For example, there’s the Voodoo produced a dirty configuration with Later, I was introduced to Phil’s grand Threesome. Ron Leon, Don Freason, undesirable pitch changes, especially father who’s been a full-scale pilot since and Bill Slining, of Laguna. Each has when coming about in a quick circle. the early thirties. No wonder the kid is made a U-control Voodoo suitable for Purely by experiment, I found that such an apt student. R/C soaring. The plane then weighs opening the spoiler a bit adjusted the ★ ★ ★ about eighteen ounces. The symme forward velocity without noticeable “ You’ve gotta have a challenge.” At trical wing spans sixteen inches, with a pitch change. It was then easy to match least that’s the view of )ohn Laycock of constant nine-inch chord. The ailerons the vehicle speed to the wind velocity San Diego. He’s put together a super are one-inch wide. The elevator is two and remain in the high lift zone. light rudder-only Galloping Ghost (Sorry inches wide, and the twin fixed fins "I passed this off as a happenstance Larry. Gotta disagree with you. Pulse make it "groove.” You’d be surprised at until I came across a relevant article in rudder-only is just that. . . pulse rudder. the stability of these unusual “ wing the November, 1980 issue of Hang Pulse rudder and elevator is Galloping things.” It's exciting to see all three in Gliding. Here the author makes the Ghost. Take it from an old East Coast the air at once. point that a slight deflection of the Galloping Ghoster! wen)sailplane based ★ ★ ★ spoiler may not cause significant turbu on the Zepher wing. The all-up weight is Peter Young, of Garden Grove, Cali lance and instead may provide lift only eight ounces. The fuselage is built- fornia, writes: augmentation and speed control. That up balsa with the boom being formed of "Some time ago I was flying an Aquila article goes on to discuss methods for 1/16-inch sheet balsa wrapped while when a rotor (dustdevel) passed through. introducing high pressure air behind the Rick Schramack, San Diego, with his Whisper and Concept (held by Rick's Whisper in flight. Looks fast! Cory Heilman). Concept uses carbon fibers to reinforce wing. SEPTEMBER 1982 33 Kieth Thomas' Axel in flight. Kieth Thomas with his Axel slope soarer. More info about it in the text. spoiler to have it change the airfoil in In the meantime, Rick has designed A = wing area (inches 2) new ways. This subject is worthy of and is building the Concept for his own S = wing span (inches) further exploration." FAI competitive trials. This plane is also “max = maximum working I agree. fully fiberglassed, with embedded car stress of the rod ★ ★ ★ bon fibers to ensure its strength through material (psi) Keith Thomas, of England, has been Rick’s radical zoom launches. enjoying his Axel, an aerobatic slope ★ ★ ★ “ You need to know only these simple ship designed and kitted in France. According to Dennis Harvey of parameters and the kind of flying you According to Keith, “ It’s easy to fly, Detroit, many modelers scratchbuild intend to perform. If you're a sports flier smooth, but very responsive to all their own sailplanes. Most designs are or take part in the usual thermal contest controls.” A smooth turn requires take-offs on kitted planes, so the events, the g-loading should be some roughly equal amounts of aileron, rud modeler is fairly safe if he copies the where between three and six. If you plan der, elevator. “ That’s much better than a structural features of the original. But to participate in FAI events, you need a glider that needs a thumbful of aileron when there’s no precedent to follow, higher g-load, say, around seven toten. but hardly any elevator." I’ve watched what should you do? For example, how “ The wing loading is measured at Keith put planes through their paces. thick should the wing rod be? Too many minimum ballast for contest flying or at I’m sure he's getting every bit of action modelers take a wild guess and end up the unloaded value for sports flying. The out of this one. with a sailplane that flaps its wings in the maximum working stress depends on ★ ★ ★ breeze, or worse yet, fails on launch. the wing and rod material. If you use Rick Schramack of San Diego has been "Before building your new design, steel or aluminum, consult a handbook experimenting with the Whisper, pro why not try my formula for sizing the of physical properties for the exact value duced by Baumann Modelbau of West wing rod: ______in that the alloy and type of heat treat Germany. This V-tail, fiberglassed wings d = 3 / W g A S can make a big difference in the stress and fuselage plane, operator with flap- the metal can withstand. Aluminum is erons and “ elevator" . . . and you could V °rnax 2132 usually about 30,000 psi, while steel drill couple-in some “ rudder” aspect of where: d = diameter of wing rod rod is about 100,000 psi. control. It's fast, smooth, fully aerobatic, (inches) “ In deriving the formula, I assumed and almost indestructible. We'll see how w = wing loading (oz./ft.2 > that the wing carries an elliptical lift it does in F3B competition. g = g-loading on the airplane distribution and that the wing rod is in a pure binding mode between both wing panels. The distance between wings will not affect the stress level; however, the greater this distance, the greater the amount of dihedral change under load." ★ ★ ★ According to the Wisconsin United Soaring Association Newsletter, the blood knot is useful for repairing broken winch lines. “ Find the break and trim the frayed line either side of the break, but first make sure the WINCH IS OFF. Twist line A around line B, then line B around A. Usually 3 or 4 times each direction. Take both ends and put through the center, one going each direction. Now Control installation in the Axel. Aileron, elevator and rudder (note use of cables). Con tinued on page 78 34 MODEL BUILDER 2. Latest "advance" in Class A or B Ignition Limited Engine Run . . 5. Don Carll with his Goldberg Gas Bird and McCoy 29 ignition. a 1-1/2 scaled Comet Interceptor, by Jack Alten. Merwin Ranch. Really goes! popularly called the"Billiard Table". In that same line, the off-centered Photo No. 2, of Jack Alten with his scaled Comet Interceptor, is also presented looking northeast whereas No. 1 was taken northwest. Fantastic place!! Alten, who is an engine tinkerer at By JOHN POND heart, is quite interested in ignition pmspmsNote the background. This is the engines since the 55 second motor run incredible Merwin Dichondra Ranch rule was passed favoring ignition en . . . 200 acres under direct cultivation for gines. Actually, this is a big overkill for seed, and a surrounding area of "volun Class C, as a Playboy Senior with a • Readers of this column are probably teer” grass clear to the road. With grass McCoy 60 can be seen in Photo No. 3, struck by this writer’s penchant for con only an inch high or less, this site is but the rule seems to help the Class A stantly reporting contests. This is true to the extent that this seems to be where the action is and where the latest de velopments and variations of old timer flying can be described. The sport flyer (I'm one myself, I can’t win either) can quickly find out for himself what parti cular phase of old timers he wants to enjoy. As an example, look how this new 1/2A Texaco Event took off!! Now that the 1982 SAM rules are in full force, the West Coast SAM Champs, as directed by this writer, is well worth commenting on, as this meet brings out the best. As a reward for the contestants, Photo No. 1 shows C.D. John Pond and his trusty assistant, Maryann, giving out the "goodies” . Darn few modelers went home empty handed, as some places ran as high as eight in the more popular 1. Plenty of trophies at the West Coast Champs, Pond on horn with his everlovin' Maryann on events. prize distribution. 3. Latest ignition fad. A scaled up Playboy Jr. with McCoy 60. Outa 4. Gene Downey, EBRC (East Bay R/C), with hot flying scaled up sight after 55 second motor run. Ridiculous! Strato Streak. W/C Champs. SEPTEMBER 1982 35 6. Picture puzzle. See the tree? See the m odel? Dave Marshall cou ld 7. West Coast SAM Champs Sweepstakes winner, Jim Kyncy, with have stuck it on the nearby power lines! his Dallaire. and B designs. With the added weight of an airborne R/C pack (generally in the 8 oz. range), the small models must be scaled up to a wing area that will give 8 ounces weight per square foot. The foregoing two models indicate this trend. At these weights, an excellent glide can be main tained even with a flat bottomed airfoil! Had enough of scaling? Well, we’re going to slip you another one in the form of Photo No. 4, showing ERBC member. Gene Downey,with a hot flying scaled Garami Strato Streak. Unfortunately, Gene failed to complete all the flights as the strong wind did 9. An early stick type gas model produced by Carl Carlson as a kit to supplement the Aero cause problems. Knight engine. This particular Strato Streak appeared No contest would be complete unless Carll let his model go out of sight to be properly stressed, as scaled Strato someone stuck a model in the only row overhead. All models were retreived Streaks in the past have had the unhappy of trees by the roadside. Dave Marshall later in the day, whew! Kafer’s second tendency to shed a half wing under the was quite successful in this. Luckily, he model loss caused considerable damage stress of motored flight. When scaling a was able to get the model down without to the Mike whereas the big PB-2 model, care must be taken to consider incurring too much damage. As can be suffered only minor breakage in the the additional stresses imposed on a seen in Photo No. 6, this writer still wants nose portion. larger model. to know how Dave missed the electrical To back up on the ignition kick again, For those who like it straight, Photo lines paralleling the trees. Some guys are and to show how the boys have gotten No. 5 depicts Don Carll with a Goldberg lucky?? their act together in Class C,a three-way Diamond Zipper (called the Gas Bird by In that same pattern, quite a few tie forced a sudden death flyoff. Even those who like to differentiate from the "zilch” flights were noticed. Flyers from with the reduced motor runs (50%) and Zipper) that is built to exact size. Despite Southern California like Jack Albrecht conditions not as favorable, a max flight its good climbing qualities derived from and Chuck Patterson, who were un- was required to win! the McCoy 29 in the nose, the model has familar with the wind conditions of the Probably the most spectacular igni a tendency to literally fall out of the sky. north, ended off the field limit more tion powered model was the Kerswapof The added 8 ounce R/C airborne pack than once. Big problem here in trying to Jack Albrecht, using a Torpedo 29. Man, is just a little too much to carry for a good win is that this kind of flight is an official does that ever climb! Most surprising to glide. The wing loading is estimated flight of zero . . . ouch!! this writer is that "O ld Weakeyes” Jack between 12 to 14 ounces per square However, the Northern California Albrecht can see that model at better foot. Tough to soar with eagles when boys couldn't crow, as Ted Kafer than 1200 feet going like a shot! Wow! you weigh like a turkey!! promptly put one off the base and Don Needless to say that Jack won. About time to list the results, but before that, Photo No. 7 is presented (Not the best for focus) of Jim Kyncy, directly after the contest, as the Sweep- stakes winner of that gorgeous per petual trophy put up by all California O/T R/C SAM Chapters. Results look like this: CLASS A 1. Jack Albrecht 15:14 2. Jack Alten 10:34 3. Loren Schmidt 7:02 CLASS B 1. Jack Albrecht 21:03 2. Loren Schmidt 13:32 3. Don Carll 10:24 CLASS C 1. Ed Solenberger 29:20 2. Jim Kyncy 27:01 36 MODEL BUILDER 10. Advanced type gas model kit was produced by Carlson to accommodate the Aero Knight engine. 11. Rare design by Clyde Austin (holding tail boom) called "Dingbat". Webster Hill is tuning the engine. 1935-37 era. 3. Jack Alten 24:55 ANTIQUE 1. Jim Kyncy 30:40 2. Loren Schmidt 29:31 3. Jim Caughran 28:35 TEXACO 1. Jim Kyncy 30:27 2. Speed Hughes 22:30 3. Eut Tileston 19:18 1/2A TEXACO 1. Ed Solenberger 30:00 2. Jim Kyncy 29:33 3. Paul Forrette 28:44 ELECTRIC 1. Loren Schmidt 5:01 2. Chas. Patterson 4:34 3. Jack Albrecht 2:51 SWEEPSTAKES 12. John Gomez holds onto his 48 inch Comet Curtiss Robin while Jim Perssons cranks in 1. Jim Kyncy 55 pts. winds. San Ramon area. 2. Jack Albrecht 39 pts. Ed Solenberger 39 pts. plane News from the January to April issue of Model Airplane News extolling 1937 issues. Suddenly there was abso the virtues of their new engine, the ENGINE OF THE MONTH lutely no news and no full page adver “ Dennymite” . What had happened to One of the most interesting engines tising as had been done in the previous the "Sky Charger” ? to the engine collectors is the “ Sky issues. The highly advertised contest Well, thanks in part to Bob Veir of Charger’’, as originally announced by using the Denny motor was shelved. California Hobby Distributors (succes the Reginald Denny Co. in Model Air The mystery deepened even more sors to Reginald Denny Industries), and when the Reginald Denny people again to Jim Dunkins who wrote a tremendous took a full page ad in the December article on the line of engines in the Old Timer Mystery Model! Earliest postmarked correct answer wins a one-year subscription. Don Kress remembers buying a kit in Wool- worth's for about 50 cents, about 36-inch span. Sketch is strictly from memory. Circa 1939-40. Pond couldn't identify, so sent it on to MB office. SEPTEMBER 1982 37 13. Part of SAM 32 gang (I to r) rear: Watkins, Wrench, unidentified, Rasmussen. Andrade, Emmert; front; Gomez and Perssons. 14. Another beauty by SAM 35 treasurer, Peter Michel, a Houlberg "Isis." Flown at RAF Watton. Second in All Wakefield. January-February issue, 1969, (#30), of the Engine Collectors Journal, we have been able to piece together a story of what happened. With most of the kit manufacturers producing models to suit the availability of engines, Brown Jr., Ohlsson, Bunch, etc., Reginald Denny decided he must have an engine to complement his very successful Dennyplane model. Denny then issue a set of engine specfications to various manufacturers, with the proviso all test engines (gen erally ten to a dozen) would run trouble- free for fifty hours. This running figure came from real full-size aircraft engine tests. Denny figured if this was good enough for the man carrying aircraft, his engine should be no less in quality. 15. Australian Norm Garrett, of the Victoria R/C Club, with his R/C assisted Powerhouse. One of thecompaniesthat responded to the Denny request was Aircraft In Institute, Grand Central Airport, Glen dustries of the Curtiss Wright Technical dale, California. President C.C. Moseley Continued on page 79 .T h e A r r o w OLD TIMER Model of the Month Designed by: Bill Gibson Drawn by: AI Patterson Text by: Bill Northrop • The Arrow is a Class A/B pylon gas model out of the Goldberg Zipper Design School. Bill Gibson, in his December, 1940, Air Trails Construction article, readily admitted that, like many planes, it was not a completely original design. A glance at the drawing reveals its Zipper-like lines, but a closer look brings out modifications and improve who won Class A at the 1940 Nats with a ribs. ments that may not have resulted in remarkable 47-1/2 minute flight that Instructions for building the Arrow better preformance, but certainly sim also set a new national record for the are unusually detailed, and conse- plified construction and equipment class. uently quite long. Rather than repro- accessibility. Perhaps you could say The two most noticeable mods in the uce them entirely herein, we’ll copy these improvements allowed the builder Arrow from the Zipper are the remove and include a set with each full-size to spend more time on trimming and able pylon which gives access to the plan. Incidentally, note how well the adjusting, thus increasing flight times. It ignition components and the wing spars fuselage/tail platform lends itself to certainly seemed to pay off for Gibson, which are flush with the bottom of the modification for dethermalizing. · 38 MODEL BUILDER Plan No: SEPTEMBER 1982 FULL SIZE PLANS AVAILABLE - SEE PAGE 96 39 cast, but I would guess that in a few months the Mark II model will appear as an AM/FM, with a nano-cassette option yet! This one plays with a remark able quality, through a pair of those lightweight “ samarium cobalt?" head sets that have become so common in the past year or so. The current consump tion of the radio, which is powered by a cell different from the one which powers the watch, is a miniscule two milliamps ... over 100 hours of Crystal Gayle from a single silver oxide cell! Imagine . . . 100 hours of Crystal Gayle . . . I forgot what I was going to tell you! Oh yes. . . the size of this little jewel is one of the best examples of micro electronics to date. A receiver is, in large, a receiver, using the same elec tronic building blocks as our R/C Neat little switch guards from Dunham's R&R, do double-duty as safety to prevent inadvertent switch operation, and dress up switch mounting slots. receivers; some version of a radio frequency amplifier, a local oscillator, more complex in this receiver than in an R/C receiver, a mixer, some interme diate frequency amplification, a detector and finally some audio amplification. Add only a decoder 1C, and you have an ElectronicsBy ELOY MAREZ Comer R/C receiver. What this means is that somewhere, there are components available now, • It is early June as this is written, so it is their amp hour rating; only with a which could conceivably be used to appropriate that we have. recommended charging rate. build even smaller systems than any SOMETHING OLD The problem with this type of battery thing we've seen to date. But, wait a Ni-Cds .. . one more time! This sub is that while the "A A " size is just that, minute before you get on the phone to ject came up at the field recently; one of with a 450-500 mil rating, the “ C" and Bill Cannon, there are other factors to my friends was complaining about not "D ” types are something else entirely. In consider, mainly quantity, which I feel is getting the expected time from a battery fact, they are merely a sub-C, of the type the governing factor in holding back he had made up to power an electric normally rated at 1200 MAH, inserted developments in our hobby, not only for fuel pump. These were new “ D” cells, into a larger size plastic container, of the radios, but for most other products as from which he was expecting 3.5 to 4 size of the cell they are supposed to well. amp hours, requiring only an occasional replace. In the case of my friend's “ D" A manufacturer has to sell enough charging in this application. However, cells, he was getting only one-quarter of products to pay for the developing and he had used those “ bargain” cells that the capacity he was expecting, which in tooling, materials, and all that nasty are now so common in hardware, drug, addition to air, was all there was in the overhead before he ever makes a and electronic stores. You've seen them, plastic case. penny's profit, which means that a I'm sure, they are available from GE, The true "C ” cell is rated at 1800 mils. market has to exist or otherwise be Eveready, and probably a host of other There is nothing in either the package created for his product. Any new item is companies, are generally sold in pairs, or in any of the literature dealing with a gamble, though some are bigger and come with a spring-loaded holder these types of Ni-Cds that refers to gambles than others. Now this particular into which you insert the cells, which capacity, either normal or reduced. little electronic miracle sells for only $50, then plugs into a wall type charging There are other good reasons to stay which is extremely cheap, but let’s face module. These cells are not marked with away from them for R/C flight equip it, there are a lot more teenagers out ment. One is that they do not nave there who are simply going to die if they solder tabs, so you either have to solder don't have one, than there are R/C’ers! directly to the case, or use some sort of The mass market is the answer. Some spring contact battery box .. . both bad thing similar in R/C equipment, in the news! Another is that the resistance to extremely small numbers that would be vibration of these cells is questionable, sold, would require such a high asking which should be enough to divert them price that even less would be sold. all to what my friend was doing with However, all is not lost! The electronic them, powering a fuel pump. They are component manufacturers also depend OK for other support and test equip on quantity for low pricing. All the ment uses, as long as their limited life is resistors and capacitors that our manu known and accepted. facturers buy for pennies are not made How can you tell for sure? Well, other for R/C, but primarily for the entertain than the well-known capacity discharge ment and commercial markets, but we instruments, an easy way is to weigh benefit in the long run. The same will them, or merely to heft them in your some day apply to whatever is in this hand. A true “ D” , at 4 amps, weighs watch, and what is now in the labora around five ounces... one of these sub- tories, a lot of it will eventually drift C’s in disguise weighs only 1.5 ounce. down to us. SOMETHING NEW Along the same lines, I recently A watch/radio! Or is it a radio/watch? received some information from Mr. Ex-Californian Chris Blum, VP of Kavan Model Whatever . . . it tells time, including Harry Gebhart, of Cadyville, New York, Aircraft Co., during its operation in U.S.A., seconds, days, date, alarm, plus it plays to the effect that one of R/C-land’s best now returned to native Germany. music! True, it only receives AM broad friends in the electronics industry, 40 MODEL BUILDER Signetics, is making its IC’s available to manufacturers in a microminiature DIP (Dual In-Line Package), the multi-pin flat pack in which most integrated circuits now appear. Designated as "SO" package, this new 1C is only one-fourth the size of the standard 8-pin DIP. Amongst the 1C types initially available in this smaller package are the NE-5044 encoder and NE-5045 decoder chips. Why the servo chip, the NE-544 is not on the list would be interesting to know, but we can assume that if enough interest, or orders, were displayed by R/C makers, Signetics would add it to the list. However, I don’t think we should forget that probably the greatest problem in the future development in smaller servos exists not with the elec tronics, but with the motor, and gear train. Frankly, I am of the opinion that by far the largest percentage of today’s R/C’ers The latest in micro-electronics technology; a wrist watch that gives the usual chronograph don’t need or ever want smaller or information .. . and plays music through the companion headset. lighter radios. Just look at the size of the Anyway, this is a very clear method of much to build and campaign as a modern average airplane, and the power avail wiring two servos tosequentially operate scale R/C model is very definitely “ real” . able to vertically roll it out of sight. retract gears and wheel well doors. Such Though not mentioned in the “ RCM Having been around since the "good a chore is often done with a tricky and & E” article, a version of the system old days” of tube and relays, I am well difficult-to-keep-adjusted arrangement could be used with gas operated retracts, aware of the capabilities and reliability of linkages and springs or rubber bands. naturally using only one servo and one of today’s systems, but that is not to say This method requires an extra servo, but micro-switch. In such a case, the switch that they can’t be improved. These not an extra channel, and is completely would be operated by the gear strut, smaller components would allow manu automatic in operation. which would then actuate the servo, facturers to take some further steps in Figure 1 shows the micro-switches in which is plugged in series with one that that direction. For one thing, less mass the gear down position. When the gear triggers the gear valve. and weight mean less susceptibility to is retracted, one of the struts hits a In any such servo operated gear vibration and crash damage, and smaller micro-switch actuating arm, just before system, it is important that the servo be size would allow for changes in com the fully retracted position, bringing the allowed to operate it's full range, and ponent mounting that would in turn second servo into the circuit, to close not be stalled before it reaches the end lead to greater mechanical integrity. For the doors. The second servo also closes of it’s travel. Doing so causes it to draw a example, in an effort to reduce the size another micro-switch, which sets up the tremendous amount of current, rapidly of a receiver board down to a competi circuit for the next operation, which will draining your battery. If your receiver tive level, you’ll find most resistors, begin with the doors opening, followed and gear are both operating off a single capacitors, and crystals mounted by the gear being extended. source, the fact that there is not enough upright. At the right frequency and As noted, this ties up only one chan current left to lower the gear is not going amplitude, they will vibrate, especially if nel, and there is no sequence that the to be important at all! For safety’s sake, a you don’t believe in proper padding. In flier has to remember . . . just flip the battery separate from the one which a crash, especially in a horizontally switch. The fact that you have a full powers the receiver and flight control mounted receiver, these components servo’s power available just for door servos is recommended; the hookup for tend to keep traveling even after the PC operation means that weight is not quite such an auxiliary batteryappeared inour board has stopped, and sometimes pull as critical, and you can close them justas January 1982 column. themselves right off the board. Worse, tightly as the big bird did. Notice I didn’t AND SOMETHING BLUE they will sometimes pull a lead loose, say the “ real” one, I don’t agree with the without any visible sign, or malfunction use of the term. Anything that costs as . . . until the next takeoff. By saving some board space, these now vertically mounted components can be mounted horizontally and even secured to the board with an adhesive for far greater mechanical rigidity with subsequent resistance to vibration and shock. Even tually, we will see fully encapsulated, maintenance free R/C components which will survive most things we do to them .. . except for forgetting to charge or to turn on before launch! SOMETHING BORROWED And translated, from the pages of the WHEELS UP SW'TCH CLOSED D O O R UP British Radio Control Models & Elec m ------M IC R O .SWITCH OPEN tronics magazine, written by Tony Dow- MICRO SWITCH POSITION deswell, who admits to borrowing the . MAIN STRUTSl MICRO SWITCH idea from an unnamed Italian modeler, TO DO O R S and being helped by a Dr. John Evans. He doesn’t say so, but those of us in the know are aware of the fact that they were Switching for automatic extra servo operation of retract gear doors without use of additional all closely supervised by Ron Moulton. channel. Explained further in text. SEPTEMBER 1982 41 R/C AUTO NEWS By DAN RUTHERFORD Latest version of JoMac Lightening 2000, complete with new lightweight parts, Sanyo batteries, PHOTOS 8 Y AUTHOR improved diff, rollover antenna, etc. • A couple of months ago I was made to writer/racer land who could be trusted antenna. No glitches of any kind. endure a bit of flak in this column, to keep quiet, so of course it was an The servos are also great, in fact one of courtesy of Chris Chan. One of his big exclusive. Damn, I could sell this one for the best features of the system. I don’t points was that there are no "speed plenty of bucks, too! take servos apart unless they quit work secrets” that are only available to the AIRTRONICS’ NEW RADIO... ing, so haven’t seen the insides, but they Factory Teams. Ok, that is his viewpoint, Actually, I started on a look at this new tell me there are ball bearings on the but I am not prone to writing things that radio last month in the article about the output shafts, a combination of metal I can’t back up, so I just bit on a bullet for Delta Eagle, deciding to hit it only ana plastic gears for a bulletproof gear the past couple of months. And will lightly, as the text was way back in the train, and a coreless motor for power continue to do so for one more month. latter part of the article, and the radio is and speed. In operation, the servos are You see, I now have permission to so good it deserves "up-front" coverage. very smooth and quick. Quick enough publish a speed secret that will blow Besides, I have used it for another month that I actually used the supplied four your mind, and that is the property of now, time to really wring it out. cell battery pack the first time racing the one team, although this same team The receiver probably has some system. I have since gone to a five-cell suspects that one, possibly two, mem wondrous doodads in it, I really don't pack, just because I want the servos to be bers of another team have also dis know . . . And I don’t know any car as fast as possible, but you guys out to covered it. The interesting part here racers who would care. But it works, save weight wherever possible can use a seems to be that this hot tip is not shared which is the bottom line, isn't it? In four-cell pack and still have plenty of with other members of their team! addition to racing, a group of us gather speed in the servos. Competition is very fierce at the to p .. . every Wednesday evening for a few Mounting ears on the servos are beefy The reason for waiting another month hours of practice, and the Aitronics and a molded rubber piece serves to is to warn you of what is coming up, and receiver has been in almost constant shock-mount the servos effectively. The the deal is that I cannot write about use, just to see if there are any reliability output shafts are splined, which on the it until after the upcoming 1/12 scale or range problems. When not in the throttle/brake servo helps a lot in World Champs. As this issue will prob Eagle, it has been transferred to a loMac getting the leverage set properly on the ably be out before then, it is too early. Lightning 2000, just to keep it going all linkage when settings things up for fast, And if you were to ever wonder about the time. It works every time, all of the slow, or medium response from idle. my ability to keep a secret . . . as I was time. Range is very good, even though I The transmitter has enough trick stuff told about this new trick I asked if I had followed my usual practice of routing on it to keep you busy figuring it all out an exclusive in trade for secrecy, the the antenna up the antenna tube and for an hour or two. Throttle control is on response was that I was the only one in then just whacking off the excess the right side of the case, the off position Airtronics XL series radio system, installed in last month's test car, the D elta Eagle. 42 MODEL BUILDER can be set anywhere in its travel with a positionable lever. Below that there is a throttle trim switch that is easily operated with an extra finger, even when racing. And further down is the third channel control, which we have no use for in car racing. On the top right corner of the case there is an adjustable pot and a switch. In one position the switch gives high rate response at the steering servo. Flip the switch and you get a low rate, the amount of which is adjusted at the pot. This can bean emergency feature to get reduced steering, although I don't see much chance of actually being able to dial in the low rate while racing. In 1/12 scale, I have seen a very few racers use a low rate during the early laps of a race when the car is quick, switching to a Outlaw sprinters in 1/12 scale, MRP's new sprinter bodies, mounted on their own GP-12 series. high rate when the car isn’t driving out of the corners quite so hard, due to the voltage in the pack dropping. It's charger for the Ni-Cd Tx pack. Next to to make a mistake here. worth trying, I did and didn't like it .. . the jack is a plug that, when connected Enough! To the race track . . . the Underneath the panel on the face of to the proper adapter cords furnished transmitter is a little large, although not the transmitter is where most of the real with the system, allows you to check the particularly heavy. Still, it isn’t the most trick stuff lies. Reversing switches on all car-mounted battery pack's voltage, a comfortable to hold onto, so I made up a three channels; just install the servos, feature that won’t work on 1/12 cars, or strap of Kydex that lets the Tx hang on and if they go the wrong way, flip a at least wouldn’t tell you much, and that my hand, attaching the strap to the case switch. Starting from the left, there is an may work on five-cell packs commonly with servo tape. This works well enough adjustable pot that allows you to adjust used in 1/8 cars. I’ve never used this and first time out with the Eagle, I used the amount of throttle servo throw very feature, as the cord was cut up for the the Airtronics transmitter. But previous precisely. Not a big deal with a 1/8 car, plugs. On the back of the case is another to this I had tried racing my Super J with but very handy on a twelfther, however. plug. Proper hookup here lets you work the new Kraft "staple-gun” transmitter In the middle are two more pots, these the servos without turning the transmit and decided that it was the way to go. So adjust the amount of exponential con ter on, so if you can talk the race director it was hard going back to a big-box trol for the steering servo, one each for into letting you haveyourTx whilea race transmitter, as it just doesn’t feel natural high and low rate (remember the rate is on, you can fiddle without fiddling anymore (if it ever did). Even though I switch on the top of the case?) If you somebody else into the wall. Wait, wait! have to give up a couple of adjustable don’t want expo control, dial it out and I made a mistake . . . if you hook the Tx features, I am now settled on using the you’ve got linear response. And I’m not up to the Rx with the cord, you can Airtronics car-pack, but controlling it sure about the expo option. Some like indeed run the radio system, but you with the Kraft transmitter, a combination it, some don’t. What I have been doing is must turn the Tx on to do this. With that works very well after a bit of linkage to dial in quite a lot of expo on the low everything patched in properly, the adjustment, along with recentering the rate side, along with the low rate giving signal is not going out the antenna, but steering servo. quite a lot less steering than high rate. I direct to the Rx. However, if you unplug The only problem I had with the normally race with linear control on the the cord before turning the Tx off, system was that the switch got hit by a high rate switch, figuring that if I guess whoever is racing on your frequency will small rock, or something, once, and the real badly on tires I can always flip the be crashing. Not good enough. I doubt car went sailing down the straightaway rate switch to the low position, having seriously if any race director will let your reduced steering throw, as well as a very radio out of impound, it is just too easy Continued on page 84 soft center around neutral, which should tame the car enough to at least be raceable. Is this getting confusing? The last two pots can be real handy,as they adjust the left and right throw of the steering servo. I don’t care how carefully the steering linkage is designed or how many hours are spent getting everything just perf or how precise the servo is, it is only very rarely that when all of the monkey-motion finally gets to the front wheels they deflect left and right exactly equal amounts. No problem here, just dial in the amount of travel left and right, each separate of the other, to get an easy solution to a previously difficult problem. The steering wheel is real smooth in action, mainly because somebody thought enough to slip in a ball bearing, and the return springs look high quality. Ever have a steering wheel return spring break in the middle of a race? Yeah, me to o ... Crystal access is on the left of the mostly metal transmitter case. On the Another Outlaw-type sprinter, this time in 1/10-scale and mounted on MRC/Tamiya's off-road chassis. B ody fro m MRP. right side is a jack for plugging in the SEPTEMBER 1982 43 Three 3D boats from Baltimore club. Mike Whitley's Dumas .60. R/C POWER By JERRY DUNLAP BOATS WE'LL PRINT ALL THE NEWS . . . EVEN series at 2 all. The final race, Cain took and out of the stadium. Temperatures STUFF ABOUT WIND POWERED BOATS the lead at the starting line and never were in the high 80s and it took 200 races Richard Palmer, coordinator of the looked back. to determine the winner. Mini-America’s Cup provided the fol Thirteen skippers came from five The annual “ Silver Bucket” was lowing information on a sailing event states, and from as far away as awarded to Carter Cain at the end of the that has been going on since 1974. Plattsburgh, New York and Itasca, program by Rich Palmer, Mini- CARTER CAIN COPS “ MINI- Illinois. America's Cup Coordinator. Mr. Cain AMERICA’S CUP U.S. TRIALS” SEA WORLD, the famous park in also received a permanent plaque on FOR 1982 Orlando, Florida, hosted the events behalf of the Hobby Industry of America During the off years of the “ Mini- adjacent to their giant water show along with a custom-made plaque America's Cup" races, annual trials are stadium. Thousands of spectators had presented by the Orlando RC Model held to tune up United States skippers. the opportunity to watch model Yacht Club co-sponsored the event with Keeping pace with his 1980 “ DEFENSE" sailboatine in action as they passed into SEA WORLD and was responsible for all title, when the Mini-America’s Cup races were held in Newport, Rhode Island, Carter Cain of Hilton Head, South Carolina, won out over Charlie Lalor, of Florida, in three days of intense EC-12 model yacht competition. As was the case in the 1980 Cup series, Carter Cain wound up in a tie for first place, after three days of racing. This time Charlie Lalor was the other skipper. A 3-out-of-5 race series was established. Carter won the first race easily. Charlie Lalor bounced back with the next two, and things looked dim at the start of the 4th race, when Lalor took an immediate lead at the starting line. A key tacking Dave Field's .60 Sightler leaving pits at Stone Mountain, Atlanta Deep V race. A ll photos this error by Lalor allowed Cain to tie the month by Dan Vincent. Business end of Sightler .40 boat. Interior of Sightler .40. Radio box and inner liner standard from Sightler. 44 MODEL BUILDER Fred Gimbel's 3D boat, .60 powered. Mike Whitley's Dumas .60. Uses sliding coupling on pipe to keep engine on power curve, connected to throttle. of the racing procedures. John Reynolds finishing boats. Well, I didn’t make it the propeller strut when viewing the was liaison to the Mini-America’s Cup difficult for them to figure out who was transom. At least 50% of the people who Committee. last. My other arena of distinction was purchase a JVS boat do not follow our FINAL RACE RESULTS for penalties assessed during a race. In instructions and set the rudder on the 1. Carter Cain, Hilton Head, S.C. 20+3 one heat, I managed to accumulate right side of the strut. I would like to 2. Charles Lalor, Miami, FI. 20+2 three violations . .. before the race even explain why we recommend this left side 3. Dick Finlay, Miami Lakes, FI. 19 started. installation. 4. Don Biggins, Dunedin, FI. 18 Sailboaters have a term called "sea "In full-size hydroplanes, almost all 5. Chris Jensen, Itasca, III. 15 lawyers.” In power boat racing, you do a the boats have the rudder on the right 6. Bill Crump, Mount Dora, FI. 13 lot of reacting instantly to what’s hap hand side of the strut. However, you 6. Ed Zeone, St. Petersburg, FI. 13 pening around you. You also react in must remember that these hydros make 8. Ricky Biggins, Dunedin, FI. 12 sailboat racing. FHowever, the boats are only left hand turns. 9. Albert Saar, Holly Hill, FI. 8 not going nearly as fast as a powerboat, "Model boats, on the other hand, 10. Karen Lack, St. Petersburg, FI. 6 and there’s no noise. So everyone is almost always make right hand turns. 10. Bill Gale, Orlando, FI. 6 talking and shouting at each other. In You would think this would be enough 12. Jim Carter, Plattsburgh AFB, N.Y. 5 that heat where I got three violations to make one wonder where the proper AH, I REMEMBER THE LAST prior to the start, I had three guys yelling place for the rudder should be. SAILBOAT REGATTA I ENTERED at me. When one of them hollered, "Do "Let's think about it for a minute. First, I actually used to participate in sail something right, Dunlap.” I countered the propeller digs a hole in front of itself boat type races. You notice I used the with, "I’m open for suggestions." It in its demand for water. When the word 'participate.' I’m not sure I ever didn’t seem like his suggestion, "Put it rudder is mounted on the right side of figured out how to actually race a away," was all that positive an answer. the strut the rudder turns into this hole sailboat. If you want to create a real fuss, Actually, model sailing can be a real the prop has or isdigging. When making just try racing a sailboat like you do a fun experience. I did enjoy the beauty of a right turn, the rudder is operating in powerboat. That, my friends, will get the boats gliding across the water. this hole or void of water. The rudder you into one big fracas. Although I never became adept at the must turn morethan normal to make the The last sailboat race I participated in competition spectrum, it was mostly my right turn and steering can be erratic. was the 50/800 class at the 1973 failure to seriously learn the rules. “ Now, if you mount the rudder on the N.A.M.B.A. Nationals held on Green SO WHERE SHOULD YOU left side of the strut, your rudder will not Lake, in Seattle. For those not into the STICK THAT RUDDER? have to turn as much since it is operating sail scene, the boats are 50 inches in Vern Schmidt from JVS Boats provided in solid, undisturbed water. Secondly, length and carry 800 square inches of me with some thoughts about rudder most hydros must angle the strut, shaft, sail. I had a Vortex Soling . . . a neat craft location that is certainly worth sharing. or bend the fin to make the hydro go that sailed well. I had done some sailing "We receive two or three inquiries a straight when the rudder is pointed at the local level but this was my first week asking why JVS recommends experience at a national type event. I will installing the rudder on the left side of Con tinued on page 85 point out that sailing at N.A.M.B.A. Nationals has never really been the highest level of national sailboat compe tition. I personally can’t even see the value of N.A.M.B.A. continuing to include a sailboating section in its rulebook. (AMYA, American Model Yacht Association, conducts many class sailing regattas, wen) But that’s a per sonal opinion and I'm willing to print a rebuttal. Anyway, here I am with a little Soling entered in the 50/800 class. The one neat thing about sailing is you almost always finish your heat. However, it can some times be an embarrassment when you manage to finally cross the finish line and everyone else is packed up and ready for cocktails. I managed two rather dubious distinctions during the contesting of the 50/800 class. I placed absolutely last. . . by a big margin. I was the absolute, undisputed, last place finisher. This is significant because in many sailing contests there is a very Fred Gimbel drains his "Ding a Ling" on Herb Stewart! close point spread between the top SEPTEMBER 1982 45 'Flipper" Les Pardue, as filmed by Bob Hawk, in background. -M- By "DIRTY DAN" RUTHERFORD ontrol line PHOTOS BV CHARLIE JOHNSON • When sitting down to do the monthly the RAC for some time, finally retiring organization and scheduling." CL Column, I either have just tons of from this position, with Jim Ricketts And as the CLCB rep from this district, stuff on my mind to write about, or there taking over the job. I will have to agree with that completely, is a small void ... not where my mind Quoting Ron McNally, CLCB chair as any questions about Racing rules should be, but where the CL thoughts man, "It is appropriate to write a few proposals were easily answered by a generally knock around. Not too much words to try and express my apprecia look at the input Joe and the RAC there this time around, so the column tion for the fine job Joe Klause has done furnished. Without looking through my will take the scatter gun approach. as RAC chairman during the pastthree- records. I am also quite sure that what RACING ADVISORY COMMITTEE and-a-half rules cycles. During that time, ever the RAC wanted, in the way of votes (RAC) the RAC has always been active,effective on rules proposals, they got at least 95% Even though he never has mentioned and on time. Joe has said, ‘The work of the time. it in the Fuel Lines column, MB’s Joe involved is minimal.' If so, it can only be In case you are looking for a CL item to Klause has been serving as chairman of so because of effective leadership cheer about or just flaunt in the faces of Larry Jolly with a headlock on J.E. Albritton, as Robert Theobald Now we have Phil Shew, in for Theobald. Remember the Marx looks for Larry's funnybone. Brothers and their famous closet scene? 4 6 MODEL BUILDER ■ Steve DeBord about to launch at Buckeye, gives fuel line a little Don Gutscher (Denver Threat) with Steve Mills (Tucson) about to go squeeze for good luck. at it in Fast Combat at Buckeye. your RC buddies, the CLCB (Control lot of things . . . or did. In my early on your covering. I have used silk, tissue, Line Contest Board) and its attendent experiments with FabriKote I found its Saran Wrap, Mica-Film, Koverall, and advisory committee is a good one to pick ability to stick to be poor. I first tried silkspan. I have also bonded balsa to my up on. In this area, CL truly leads the Balsarite but this cannot be reheated, I foam cores using this method. Now for way, the CLCB handles many complex then tried Quick-Stik. the real thrill, it does not attack foam! rules proposals, dealing with widely "This was an excellent method of You can bond your covering right to the varying events and at the completion of holding FabriKote down (including the foam using low heat.” every rules cycle, it is always one of the edges). It never raised even after expo Well now, that sounds very interest other boards that holds up the rule sure in a hot car for many hours. Since ing, especially to me, as I am totally book, with the RC guys being the then it has been used to put down silk, committed to foam Combat models and champs in this category, they can't seem Koveralt, tissue, and pieces of wood, all have everything concerning their con to get less work done in more time, for using heat from my Sealector iron struction figured out to my satisfaction. some reason. (medium setting). All that is, except for the actual covering Ron McNally has to get a lot of the "Lately we have been cutting cores for process, if this 3M stuff actually works, credit forthe CLCB runningsosmoothly, the sailplane boys. In building these the problems are solved, as there are lots he took it over right after another of the wings up, the problem of bonding the of films available that will shrink, are typically hectic cycles that generated so balsa to the core has arisen. I do not like light, and easy to get. Sticking them to many interesting pieces of correspon- * epoxy (too heavy and too strong) and bare foam has always been the big hang dence that were complete with name contact cement is just too much trouble. up. calling, circular logic and veiled threats. While experimenting with Ron St. Jean’s The 3M adhesive ought to be widely All of a sudden, we, meaning those on all-foam construction method, I was available, for films you need only to the CLCB mailing list, were getting unable to get some Scotch Products look. An uncoated version would be the simply worded messages that were to number 77 cement. He uses this to bond lightest, of course. How about the stuff the point, instead of long, rambling Saran Wrap to tissue covered foam. I they use in meat markets for shrink- letters that had to have worn out at least was, however, able to get some 3M wrapping meats? Bob mentions Saran two or three of the AMA copying Multipurpose Spray Adhesive (numbers Wrap, that is available everywhere. I machines over the years. O f equal 6081 and 6082); this is great stuff. work for a hobby and toy distributorship. importance was that advisory commit "First you spray the areas you wish to We have a huge roll of shrink plastic for tees, then just getting started, instead of have your covering adhere to with the rewrapping merchandise; it is very light, being constantly reminded that they 3M spray. Allow this to dry thoroughly, it shrinks well and is very cheap, although were advisory only, were asked for more takes a fair amount of time. Then, using input and assured that said input would the low setting on your iron, simply iron Con tinued on page 86 be put to good use by the CLCB when it came time to vote. Today, any advisory committee gen erated proposal automatically passes on the initial ballot, the CLCB acknow ledges its existence, but does not vote on it. From there, these same proposals get hashed out in the committees, in addition the committees deal with individual’s proposals that have passed the initial ballot. And in the end, if any of the advisory committees can reach a unanimous decision on the proposals affecting their specialized events, the CLCB goes along with their wishes. It is all nice, neat and effective. Thanks Ron, for an (almost) thankless job well done... MORE ON COVERINGS... Robert McLinden, of Eastern Soaring Supplies, P.O. Box 437, LeMont, Penn sylvania, 16851, writes: "In response to your request in the June issue as to Myles Lawrence (Mission Viejo) flipping while Jarl Boles (Salt Lake City) holds, at Buckeye. anyone who uses Quik-Stik. I use it for a SEPTEMBER 1982 47 of Lindbergh, Chamberlin, Goeble, Byrd, Earhart, and their comtemporaries. Lindbergh’s daring conquest of the Atlantic had the greatest impact on the populous. I was almost nine at the time, adn I first heard of his success from an exuberant policeman as I was making the long trek, on foot, from a local farm being used as a flying field. Even before the 'Spirit of St. Louis,’ I had been hooked! "The dreadful depression of the thirties permeated all activities. I don’t remember many of the hardships, but, rather, I identified with the promise of the future as exemplified by the feats of dashing aviators flying ever better air craft. Model building, at that time, was an excellent activity to pursue. Unlike kids of today, we didn’t have to be sent to camp or summer school to keep us occupied. With some pine, balsa, Ambroid, and periodicals, we never had to ask ‘What can I do?’ to keep from • This month’s point-to-ponder, by abstracted the following: "It is probably being bored. For me, it was a great Tom Anderson,seems particularly appli unwise to spend much time reflecting period. cable to our favorite hobby. on the past. I believe we should keep "One can't be absolutely certain, but I EARL STAHL looking and moving towards the hori believe competition in those days was And certainly one of those accom zon. My exception to that philosophy every bit as stiff as I observe today. To be plished individuals would be Earl Stahl, involves the aircraft and model planes of a viable competitor, one had to build famed for his rubber-driven flying scale the period between the two great wars. good models, be able to analyze and designs. Max-Fax, the Washington, D.C. "Among my earliest recollections are correct flight characteristics, and then to Maxecuters club newsletter, featured the visit of the Gates Flying Circus to my practice, practice, practice to be able to the fascinating reminiscences of Stahl, home town, and then, later, the excite deal with all kinds of environmental entitled “ Looking Back,” from which we ment and awe imparted by the exploits conditions. Stahl then discused his great series of published flying scale designs, and continued: "For several decades after I stopped submitting the articles, I sup posed the various models had been forgotten. Then, in recent years, letters, phone calls, and visitors to my NASA office made me aware that many folks had built and enjoyed the models. It is still a source of pleasure to be aware that some of the designs are still being built and flown." Earl elaborated fu rth e r upon his model building experiences,then signed off with this thought: "Those were enjoyable times. I look forward to one day stepping back from the busy routine that has occupied my working years, so I may again participate in the great activity of building and flying scale model planes.” NORTHROP WING EVENT Carl Hatrak, perennial Contest Direc tor of the Northrop Flying Wing Contest, has announced the forthcoming 16th Annual. Scheduled for Sunday, Novem- Charles A. Lindbergh, perhaps aviation's greatest booster, also supported modeling. Seen here during 1928 at Mines Field, L.A., w ith Mulvihill contestants. Note expression second from right! Continued on page 88 F6F Hellcat, built from Flying Scale Models plans reduced to 1/30 Don "The Wiz" Assel tries on his White Canard Peanut for size, scale by Milan Kacha, Czechoslovakia, uses Brown Jr. A-23 C02 engine. See text. Photo by Dave Gibson. 4 8 MODEL BUILDER onto the pre-doped surface and left to dry. Since I usually finish my models with Floquil, I'll remove the excess tissue around the tail with sandpaper, leaving an exposed edge of the framework. Then the bare wood is given a couple of coats of dope to seal it. If on the other hand, you are covering with colored tissue, leave enough excess tissue on one side to lap over the framework. By doing it this way, you are reducing the chances of warping, plus you will always have a wrinkle free surface. I’ll admit, that on occasion, a wrinkle will occur. How come? Well, it isn't because of the method used. If a struc ture has an unsupported area, say, like the bottom of the fin usually is, it can give slightly, producing an unwanted wrinkle. So, on any area that you may suspect a weakness, reinforce with a gusset or a diagonal brace, which should Ing. Charles Ludvik built this real nice Avia BH-21, to 1/20 scale. Bet it flies real well. take care of it. COLOR FULL NOTES (CONT.) The linens manufactured by Britain, no Methuen equivalent can be stated). This is a continuation of the article France and the United States were A white which is gently modified by started last month, on WW-I military nearly identical — certainly so for the greying and a hint of yellow might serve aircraft finishes, as authored by Wally purposes of this article. Some of the as a match. Batter, and first published in the aircraft used by the British and American It didn’t take long (or the weakness of February, 1982 issue of World War I air arms were of French manufacture, bleached linen to make itself apparent Aeroplanes. For further inform ation and this introduces another factor into and it was withdrawn from use. The about this publication, see last month’s the color of undersurfaces. replacement fabric was a good linen, the column. French practice for the treatment of material shortages which were to plague UNBLEACHED LINEN unbleached linen was much the same as all of the combatants hit Germany more Second in mystery to the color of PC- that of the British up to about mid-1915. severely than the others. It became 70 is the color of natural linen after being Seeking to provide better protection necessary to add other fibers to the linen doped. Its natural color is about that of a from the deleterious actinic rays of the used for aircraft. The color resulting grain of wheat. Four or five coats of clear sun, the French devised a pigmented from the use of these ",foreign" fibres dope would not make much change in hue that was a near match for the natural gave the fabric a distinctly different this color. However, clear varnishes fabric. Within this coating, which was coloration compared to that of Ger would take it to a Methuen (3-4) (A-B)2. not, of itself, all that much protection, many’s enemies: about Methuen There is a light honey-gold-tending-to- they added powdered aluminum as an 4(C-D)4. orange tinge when the varnish is viewed effective sun-screen. When the French When Germany took to printing in depth (as in the can) which would went to deliberate camouflage patterns slightly modify anything which it over during 7976, these undersurface coat Continued on page 90 coated. A basis for reproducing this ings took on a somewhat deeper hue. color (failing the ability to dye a natural Although the experience on the German fabric such as silk), would be the appli side was similar fora while, they did have cation of an orange yellow that was very a different approach. much cut by clear to produce a trans During the early days of the war, parent tint. Alternatively, a similar German aircraft were often covered process cut with white would give an with bleached linen fabric. Tony Fokker opaque tint which might serve as a fabric made use of it up to the advent of his dye for the first and second coats — monoplanes. The color of this fabric is finish with clear. best described as an off-white (for which Interesting trophy idea from Czechoslovakia. Lubomír Koutný, who took the Czech model photos herein, built this Beta-51 powered by a Avia B-534 the winner. Caption indicates Modela C02 engine. Spans 27-1/2 inches, weighs 70 grams. Czech/Soviet competition. SEPTEMBER 1982 53 ' T / * '# ■ r 'S Γ" '/*· Ί [ C=D O CZD j i í. DAPHNE SD-1A /"·/' /3 5 * a é r/ '2&/'ρΑ(Ζί'f^kiuM í/y; fb ssy r& tsfcn ■<7**W ·» /·*>»■· '*''’**" MODEL BUILDER m agm xinm Pian NO: 98 22_ 54 FULL SIZE PLANS AVAILABLE - SEE PAGE 96 MODEL BUILDER By PERRY PETERSON . . . The designer of this homebuilt appears to have been strongly influenced by Wittman's "Tailwind". In any case, DAPHNE this 20-inch span version makes an excellent flying scale model. • The Daphne SD-1A is an excellent the rest of the structure. Remove the Build the tail flying surfaces over the small homebuilt aircraft. This attractive side frames from the plan and join at the plan with 1/16 stripwood. The wings are side-by-side two-seater, designed by Art tail post. Cutthe1/16squarecrosspieces also built in the conventional manner. Szaraz of Bedford, Ohio took second to length, using the top plan view as a Note that there are two top wing spars. place in the 1970 Oshkosh aircraft flight guide, and glue in place, starting at the The forward spar is used mainly as an aid efficiency test. A Vidervol VS-1, de rear and working forward. to covering. Using the color pattern signed by James Vidervol in conjunction Form the .030 music wire landing gear shown in the photos, this allows cover with Art Szaraz, placed third in the same using the front plan view as a guide, and ing with white tissue from the trailing test and was the prototype for the sandwich between two F-4’s. Glue this edge forward to the front spar and blue Daphne. A photo and a good three-view sandwich with epoxy and clamp while tissue from front spar forward to the of the Daphne SD-1A can be found in drying. Snap clothes pins work great for leading edge. Laminate the wing tips Build Your Own Sport Plane, by Don this. When dry, remove clamps and using four strips of 1/16 x .020 bass Dwiggins. install in fuselage. At this point it is wood. As a model, the Daphne is quite easy advisable to apply masking tape to the FINISHING to build and is a superb flyer. If you landing gear leg ends for safety. They Sand everything carefully and seal the decorate yours like the model in the can be removed just prior to installing front sheeted areas, wheels, and nose photos, it will be one of the sharpest the wheels. Install F-3 under the wind block with three coats of sanding sealer, looking planes at the flying field and will shield area and trim two F-5’s to exact sanding between each coat. Now it is draw many favorable comments. length by test fitting, and glue in place. time to cover. Use thinned white glueas This model was my third Daphne. The Add F-1 and F-6 to the top of the cowl a tissue adhesive. Paint a solution of first was a 13-inch span peanut that was and F-2 and F-7 to the lower portion of about 55% white glue to 45% water, not very successful, but the second was a the cowl. When dry, sheet the cowl areas around the outside edges of the frame 20-inch wing span version that was a top with 1/32 balsa. Use four pieces, one work to be covered by one piece of notch flyer. It was the only scale model I each for top, bottom, and sides trim ever lost in a thermal (sob!). On it’s ming each one to fit as you go. Con tinued on page 86 eighth flight it slowly circled higher and higher until it was lost from sight after eight minutes and ten seconds. The seventh flight was timed at three minutes and eight seconds. CONSTRUCTION Lay the plans down on a piece of fiber insulation board andcoverwithSaranor similar kitchen wrap. Make two identical fuselage side frames over the plan. The plane in the photos was built using alaphatic resin glue except when noted otherwise in this article. Double-glue each joint by applying one thin coat of glue to each joint then pull apart and let dry while the next piece is measured and cut, then apply another coat of glue sparingly and pin in place. The 1/16 square fuselage side frames will make a good light structure that is adequately strong if you select firm The author/designer's third Daphne before covering. No.1 was a not-too-great Peanut. No.2 was wood for the longerons and medium for same as featured herein. Disappeared overhead after 8 minutes. SEPTEMBER 1982 55 Free flight Mecca in the U.S., Taft, California, this the 1982 National Free Flight Championships. Hmmm, wonder why we can't get some motorcycle advertisers? somewhere on the field (when I first began, even Taft wasn’t big enough a landing spot!). Now I’m trying to find FREE FLIGHT out how to stay in thermals . . . I can recognize when the glider’s in lift, but By TOM HUTCHINSON I’m too clumsy on the sticks to take full advantage of the situation. (It’s a little different from free flight, where the • This past month has made me acutely and admitted my weakness, you might models tend to stay in lift once they find aware of how many people other than wonder what charms the electronic it .. . the difficult part is realizing that free flighters read this column. First, I branch of the hobby would have for a you have to do something to keep an RC got a phone call from Dave Johnson, a long time free flighter. (Boy! Am I ship in the thermal.) For me, this sort of top RC Sailplane flyer from the Portland enjoying this! wen) learning experience is fun. area, taking me to task for describing In my case, practicality was a major Even more fun is watching the models Woody Blanchard's Gawn design as consideration. Our Oregon weather is fly. Here, I believe, is the crux of a sail "gawky looking". He’d built one, and it usually wet and a bit breezy in the plane’s charm . .. THEY LOOK AND FLY was still in his mother’s attic. (He also spring, and during the summer months, LIKE A FREE FLIGHT!! The resemblance mentioned that he’d gotten to know most of the usual flying sites are planted starts out when you begin building the Woody very well at sailplane contests in crops. The chances of finding a decent kit. Most gliders look like they were . . . Blanchard even has a boat he’s flying weekend for free flight are pretty designed by somebody with a free flight named Gawn III.) Then, a few nights slim, except for our Indian Summer and background .. . twin I-beam webbed later, I got another phone call from John late winter months. On the other hand, spars like a Nordic, D-box or turbulator Oian, MAN’s Boating editor. He’d dis RC gliders aren’t as finicky about the spars, polyhedral, and tail surfaces covered a free flight field near where he weather and can be flown on smaller constructed like an Old Timer. And they was living in Florida, and was planning to sites (I have two sites within a couple of have just about the same size and weight return to his original interest, but blocks of my house, plus the athletic (a Drifter II has 600 sq. in. of wing and needed some information on Wakefield field at the high school where I teach). weighs 18-20 oz., which are good num thrust bearings. It’s a relatively simple matter, then, to bers for an AB free flight; a Wanderer99 So, bolstered by the ecumenical find a time and place to fly RC, as has the same wing loading as a Star- nature of my readership, I hope I don’t compared to finding a spell of calm duster 900). As a result, they look the lose too many of you out there by con weather for test flying. same in the glide, which is what I let the fessing that I’ve spent some time for the Another attraction is the fact that model do mostly .. . just let it drift past couple of years attempting to learn learning to fly is a real challenge for around the sky and watch it fly, which is the art of flying RC sailplanes. (There will me . .. it’s not easy as the good flyers one of the main attractions of free flight. be a slight pause while all the diehards make it look! At first, my major goal was The only difference is that I have the turn to Dirty Dan’s column.) to pick up the airplane in one piece. ability to bring the model down close to Now that I’ve come out of the closet Then, it was attempting to land the ship me. Hank Cole's Dutch chocolate flavored thermal detector. Knowing Three generations of Cunnyngham; Jeff, Vic, and Vic Sr. Over 100 how is nice, but knowing when is better. years of modeling in one fam ily! 56 MODEL BUILDER AMA Dist. X Veep, Jim Scarborough, launch ing his Nostalgia Ram Rod 600. Famed Taft kitty litter plant over Jim's head. I guess the point I want to make is that my hobby is model airplanes, not just free flight, and that it’s fun to step out of your rut for a while and sample some of the other phases. A lot of my fellow club members in the Norwesters feel the same way, since we have flyers with interest ranging from RC Pylon racing, to control line stunt, to indoors, who also fly outdoor free flight. I’m going to continue doing it also. (Model Builder's philosophy scores again! wen) DARNED GOOD AIRFOIL Davis #2 (A = .6; B = .1) This is another of the Davis series of airfoils as drawn up by Hank Cole in the 40's for Air Trails. The Davis #2 is a very thin (less than 6%) low cambered airfoil suited best for fast flying models. It bears more than a passing resemblance to the airfoil used on Eugen Verbitski’s latest F1C ships. He solved the problem of obtaining sufficient torsional rigidity in such a thin section by using aluminum Lee and Contest Manager Joe Norcross ponder over s o m e of the trophies handed out at the sheet covering over balsa. It could also '82 NFFC. Flag was reminder that it was Memorial Day Weekend. be carved from solid sheet. It might also make a good airfoil for small, lightly With the resurgence of interest in and the ability to absorb a bit of rough loaded models such as Coupes or P-30, rubber-powered events, it’s about time I weather and landing in unexpected or Rocket models. published a genuine Mulvihill model. places. MYSTERY MODEL The model selected is not one of your NOTES ON POWER MODELS This month’s mystery model should exotic, lightweight, state-of-the-art by George Fuller be familiar to most Nordic flyers, even Unlimiteds, but a very practical contest I recently ran across this article in FF though it never won a World Champion design by John Lenderman. John is one News, by one of Great Britain’s fore ship. It was widely flown in all parts of of the most consistent winners among the world, and should be recognizable our Northwest rubber contingent, and most power flyers. Although written by the long nose, elliptical wing tips and models like this one are part of the nearly 20 years ago (1962/3), I think they rectangular stab. If you think you recog reason. John’s ship is reminiscent of the shed considerable light on the problems nize the design, send in your identifi Oakland Cloud Duster school of of designing and flying high perfor cation to the Model Builder office (621 thought, but beefed up a bit to take our mance gas models. W. 19th St., Costa Mesa, CA 92627) to see normal non-California contest condi The present availability of very power if you’ve won the free subscription. tions. Since we fly all of our contests to MODEL OF THE MONTH three-minute maxes, pure performance ful, lightweight glow motors, allowing lohn Lenderman’s Mulvihill isn’t as important a factor as consistency the construction of power duration DARNED GOOD AIRFOIL - DAVIS no. 2 (A=.6,B=. 1) — _ STATION 0 1.25 2.5 5 7.5 10 15 20 25 30 40 50 60 70 80 90 95 100 UPPER 0 1.29 1.88 2.78 3.54 4.07 4.99 5.6 6.02 6.28 6.36 6.08 5.42 4.45 3.18 1.69 0.86 0 LOWER 0 - 0 .5 7 - 0 .7 - 0 .7 2 - 0 .8 - 0 .4 9 -0 .2 6 0 0.26 0.43 0.72 0.89 0.92 0.86 0.65 0.3 3 0.14 0 SEPTEMBER 1982 57 MODEL BUILDER Verbitsky's model box contained four FAI models like the one below, each one a true master piece of workmanship. He's teaching Cuban modelers how to fly FAI. Yes, folks, the legendary Russian modeler Eugene Verbitsky is just another reader of Model Builder Magazine. models with a much higher power/ weight ratio than was previously pos sible, has obviously increased the per formance potential of these models. As many of us have found out (picking up the pieces), the actual attainment of this increased potential performance, is not quite as simple as putting a hotter motor Eugene Verbitsky w ith one of his metal covered F1C ships. Straight up, kick-down elevator into up front. glide. Scoop: Watch for lithographed metal covering next year! Besides demanding more careful handling of the model, I believe a in increasing power was obviously to the model began responding almost somewhat modified approach to model increase performance. This eventually normally to rudder adjustment, though design and rigging is called for. As a came about, but not without consider in a rather critical manner. direct result of my personal experiences able effort. This seemed to prove that the initial with a model, the power of which was The well behaved Oliver model now wayward pattern, sometimes right, increased by about 30%, I have reached became a wild bird, refusing to do a sometimes left, sometimes straight with conclusions which I offer in the hope consistent pattern at all, having lost its a loop, was not the rudder’s fault, and that they may be of some help to others sense of direction completely. Rudder could not be cured with rudder, be struggling with the same problem. adjustment seemed strangely ineffec cause the basic trouble was over-ele After flying an Oliver Tiger powered tive and I finally realized that the rudder vation (too much incidence-TH), not model for a year or so, I replaced the no longer had its normal effect at all. I always an easy fault to diagnose, I find. Oliver with a Cox TD .75. With the turned my attention to the tailplane. By Direction seemed to be at fault, so Oliver, the model had been fairly docile increasing its incidence in gradual and performance quite good. My object stages, the loop tendency decreased and Continued on page 92 Les DeWitt, Rowland Hts, CA„ with "flapper" Wake. Wing flaps up Ralph Prey. Model provides its own caption. He's an advocate of during power run, dropped for glide. Skinny wing a problem! radio recovery for gas-powered F/F. SEPTEMBER 1982 59 FULL SIZE PLANS AVAILABLE - SEE PAGE 96 MODEL BUILDER Moira Smith with original Pawn at Wilmington, Ohio Nats site. adequate for me. Avoid the light blue, genuine Dow Styrofoam. It’s twice as strong, expensive, and heavy as the regular white stuff. By PAUL SMITH . . . DevelopedPAWN as a result of the introduction of 1/2A White glue or aliphatic resin such as combat at the Nationals, this little foam and wood fighter has all the Titebond is used for most foam and performance needed to make it a winner at any contest. wood joints. Hot Stuff and similar instant glues, • Half-A combat has been around as a finish with a 5-1 record, including four with baking powder as filler, are used local event for many years. I got started kills. In addition, the 1/2A practice only on non-foam joints. These glues in combat with 1/2A’s in 1959 at the made a noticeable improvement in my dissolve foam. nearest schoolyard. In 1977, the custom reflexes, and helped me get out of a “ Hot epoxy” is my term for Hobby- of having 1/2A combat at the Nats as an slump in fast combat. poxy Formula 2 heated with a heat gun unofficial event began. To many people's This is a simple model to build if you to lower the viscosity. You mix a small surprise, the event was taken seriously are already into foam. Building your first batch of epoxy in a pot and stir while by many of the established combat two models in one week should be no heating. When it is so hot you can just winners. It has grown in acceptance and problem. If you haven't cut any foam barely touch it with your fingers,apply it this year AMA’s contest board has made yet, why not start out with the Pawn? It’s to the model. This method makes the it a supplemental event. a fun plane for aerobatics and sport glue penetrate deeper and spread on The Pawn was originally designed and flying in addition to contest combat. thinner and lighter. built for the 1980 Nats in Wilmington, MATERIALS Balsa: Small amounts of 1/16,1/8, and Ohio. The name was chosen because I Foam is bought from a lumber yard in 1/4 inch sheet are required. The spar is feel that the airframe is only one of many two-inch thick, 2 x 8 foot slabs. The 1/4 X 1/4. factors in winning a combat event. Also, density is about one pound per cubic Plywood: A few scraps of 1/64, 1/16, the typical tough-guy names usually foot. You won’t have much choice in and 1/8 will do the job. applied to combat models are a little quality from this source, but a fine grain Hardware: Carl Goldberg 1/2A con exaggerated for a 1/2A. As in chess, with foam is better than coarse grain. Better trols (45c), Ace RC 1/2A motor mount the proper strategy, the Pawn can defeat foam can be obtained from professional ($1.29), .045 piano wire, .018 leadout a more spectacular opponent. The ’80 plastic suppliers, but you w ill pay a wire, 2 sheet metal screws (1/2"), and Nats was the first contest appearance for premium price and may not be welcome 3/32" brass tubing. the Pawn, and my first 1/2A contest in because of the small size of the order. FABRICATION AND SUBASSEMBLY five years. The result was a 2nd place The lumber yard foam has always been Cut the fuselage from 1/4 inch balsa. Classic "little big plane" approach to 1/2A. It works, but not as well Tools and ingredients for producing Pawns: foam, cutting bow, as plastic mount and pacifier system. templates, mitre box, fuselage and tail patterns. SEPTEMBER 1982 61 Who can build models without proper supervision? Paul cuts foam Front ends of two Pawns. Either stock Cox needle valve or Kirn- cores using American Flyer transformer. Kraft fine-thread remote unit will work. the fuse doubler and elevator reinforce tip. By consistently using these markings made from scrap .018 flying line. Lead- ment from 1/64 plywood, and the tail you can cancel out any variation in the out guides are cut from 3/32 brass tubing pieces from 1/16 balsa. Glue the doubler templates. Cut the airfoil surfaces start with an X-acto knife. The pushrod is .045 and nose blocks to the fuselage with ing from the trailing edge. Be careful not piano wire. Bend only the bellcrank Titebond. When these are dry, sand the to squeeze the cores as this will distort end now and do the horn end after final joints, making sure the front end is the airfoil. assembly. Bolt the bellcrank to the perfectly square. Glue on the 1/8 ply Tips are cut with the special fixture mount with a 2-56 bolt and nut rather wood motor mount and 1/16 bellcrank shown on the plans. The "tip ” airfoil than the wood screw supplied. mount with hot epoxy. Insert a scrap of template is used. Cut the top surface Be sure the handle you fly the Pawn 1/4-square through the spar hole and first, starting from the trailing edge. with has line spacing of about 2 inches. wrap rubber bands around the motor Then, without removing the scrap, cut Some very adequate 2 inch handles are mount while drying. the bottom surface, also starting from supplied with ready-to-fly planes. A While this dries you can start on the the trailing edge. Glue one tip to the crossbar handle can be set at 2 inches or foam cores. The first step is to make all outboard wing with Titebond. The a crossbar can be added to an existing the required templates. Next cut the inboard tip is notched out using the two handle. A 4 inch handle as used with the following blanks from the foam block: "insert wingtip templates” . Save the bigger models will make the Pawn com 6.75 X 12.25 inches (inboard wing), 6.75 x piece that is cut out, it will be glued back pletely unstable. 11.25 inches (outboard wing), 6.75 x 2 in after the leadouts are installed. Glue Standard 1/2A lines are .012 x 35 feet inches (2 required, wingtips). the 1/16 balsa insert into the tip and glue from centerline of handle to centerline With the drop-wire fixture, pierce a the tip to the inboard wing. When of the engine. hole through each wing panel on the installing the tip, assure that the tips are The Tail Assembly is cut from 1/16 centerline, 2 inches back from the glued to the thin end of the wing core. balsa and sanded smooth with the leading edge. While the foam cutter is still handy, trailing edge of the elevator sharp and all Attach the core template to the blocks make an assembly fixture. The foam other edges round. The 1/64 plywood with nails, aligning them on a flat blank is 6.75 x 24 x 2 inches. Nail the reinforcement is Hot-Stuffed in place. surface. Detach the wire from your airfoil templates to the blank with the Cover the tail with Fascal or Monokote cutter and thread it through the hole. centerlines 1.5 inches up from the before installation. The hinges are also Cut toward the trailing edge, then bottom. Cut only the bottom surface made of covering material. Be sure to follow the top of the core up to the spar of the airfoil. This cradle forms the leave the gluing surface uncovered. The slot. Be careful to have the wire parallel bottom of the fixture. The top is made hinges are made by the method de as it enters the slot. Cut the bottom back from two pieces of scrap from the wing scribed in the article, "iron-on hinges” to the trailing edge and you’re done. cores. in the April 1979 Model Aviation. Use the same nail holes to attach the CONTROL SYSTEM FINAL ASSEMBLY airfoil templates. One airfoil template The Goldberg 1/2A system is used When the motor mount is dry, sand should be labeled "root” and the other because it is so inexpensive and light, the fuselage assembly smooth. The wing "tip ” . Also, draw an "up” arrow on each and it does the job. The leadouts are spar is only 18 inches long, not a full 24. This is to save weight and cost. Who ever heard of a wing folding 3 inches from the tip anyway? Dry-fit the spar into the outboard wing and notch the wing to fit the fuselage. When the fit is correct, glue it with Titebond and bind the outboard wing to the fuse with a chain of rubber bands. While the outboard wing is drying, cover the rear of the fuselage with Fascal, install the tail, and hook up the pushrod and control horn. Remove the rubber bands and dry-fit the inboard wing, notching out for the engine brace and pushrod. Make sure the wing fits the “ bottom assembly fixture” . Glue the inboard on with Titebond, lay the wing on the bottom Three Pawns in various stages of assembly. Scrap foam is used for assembly fixture. fixture, stack on the top fixture, and add weights. Press together from the wing- 62 MODEL BUILDER tips to assure a good glue joint. Pacifier pod — The recommended fuel system for the Pawn is a pacifier. Bladders generally give too much pres sure for the TeeDee, even with a fine thread needle valve. Hard tanks don't give a smooth enough run for such a tight-turning plane. The pacifiers used on the Pawn are interchangeable with those used in fast and FAI combat. A fine thread needle valve is not needed. Cut two pod ends from 1/16 balsa. Use these as templates to cut a dummy pod from foam. Cover one side of each end with Fascal. The tube part of the pod is cut from manila folder or computer card stock. Wrap the tube around the foam pod, glue the seam, and bind around the center with one rubber band. Wrap the tube with two continuous bands of nylon strapping tape, one on each side of the rubber band. Remove the rubber band, push out the foam pod, and glue in the end caps, with the covered side in. Cover the exposed surfaces of the pod and leave the gluing areas uncovered. Leadout Guides are installed after the wing has been removed from the fix ture. Pin them to the balsa insert with wire wickets (two per line) and glue with Hot Stuff and soda. Trim the foam insert to fit and glue in with white glue. While this is drying, you can also glue some little foam fillers in any cracks or bad fits in the model. Covering: Sand the model smooth with sanding block. Vacuum clean with a soft brush. Apply a continuous wrap of nylon strapping tape around the wing. This is very important to prevent flexing. Flexing breaks the glue joints in foam wings. Apply the AMA numbers and any other trim to the wing before covering (if you plan to use clear covering). The material should be a low-tem perature type such as Solarfilm, Econo- cote, or GBC laminating film. Use two separate pieces, top and bottom. Cut the hole for the pod after the wing is covered, glue in the pod with white glue, and (after the glue is thoroughly dry) cover the cracks around the pod. Mix a small batch of hot epoxy and seal the firewall area and the edge of the covering. Motor Mount is an ACE RC 1/2A Mount cut down as shown on the plan. This is far better and less work than the conventional beam mounts as used on fast combat jobs. One prototype was built with wood mounts and I definitely recommend the plastic. Install the mount with two wood or sheet metal screws, about a 1/2 inch long. A brass fuel filler tube is also added to the mount. This tube is made from 3/32 brass, annealed with a blow torch and bent to shape. A 1/8 brass tube adapter allows the same pacifiers to be used in the 1/2A as in fast and FAI models. Clear neoprene is used to connect the tube to the engine, thus eliminating the com mon problem of the fuel line popping off the engine. Finally, the filler tube permits the model to be fueled from the top. SEPTEMBER 1982 WHEN CONTACTING ADVERTISERS. TELE Έ Μ MODEL BUILDER SENT YOU! 63 R/C model boat builder. These brass propellers, in three and four-blade con Introducing the World’s First CUSTOM TUNED ENGINES Adjustable Hand Sander, The figurations, range in size from 2-1/2 COMPETITION ACCESSORIES inches to four inches in diameter.and all are available in right and left-hand DUPLICATOR MK1 Specialists In custom T.D. 049/061 and TBBd engines. Throttled T.D.‘s available. versions. The hubs have been threaded Patent Pending Complete Inventory of Individual atock with a 10-32 tap to fit 3/16 diameter THE DUPLICATOR. WHEN PLACED OVER APATTERN. and cuBtom parte for Cox shafts. Ranging in price from $9.95 for WILL COPY IT THE SANDER IS THEN LOCKED TO HOLD THIS SHAPE. THE STICKIBACKED ALUMINUM T.D. 020, 049, 061 Λ 09 engines. the 2-1/2 inch three-blade, to $24.95 for OXIDE SANDPAPER SUPPLIED IS THEN PLACED IN the 4-inch four-blade, these may be the DUPLICATOR, YOU ARE NOW READY TO SAND Exclualve distributor for the EDGES WITH MACHINE LIKE FINISH. best values in brass propellers offered Neleon 16 engine and parte. today. For more information on these Hard-to-get Items auch as custom needle propellers and over 275 other accessory valves, racing wheela, quick fills, items and fiberglass hulls, send $3 for fuel shut-offs, solid control Dynamic's new 56 page catalog, which is lines and many others. refundable on your first order to: For detailed brochure, send SO cents to: Dynamic Models, Drawer ‘C’, Port Kustom Kraftsmanshlp, Box 2699 Jefferson Station, NY 11776. Laguna Hills, CA 92663 Ph: (714) 830-6162 ★ ★ ★ Ikon Northwest announces the avail ability of its quarter-scale Monocoupe The completed model should weigh 5 90A. It is said that it flies as well as the ounces, give or take a 1/4 ounce. The 1934 version, and is just as aerobatic and will perform the Aresti full size routine. DELUXE PACKAGE INCLUDES TWO ASSEMBLED balance point is 25% of the chord and DUPLICATORS. STICKIBACK SANDPAPER. A DUPLI slightly outside the centerline. Out- The flier quickly realizes the Aresti CATOR GAUGE. AND A TOTAL OF 44 PATTERNS routine can be flown almost within the FIFTEEN 180* PATTERNS. 1/8“ THROUGH 1" IN 1/16" thrust is not required and wing tip INCREMENTS ARE IDEAL FOR EDGE SANDING FLAT weight is a last resort. Remember, the confines of the runway. SHEET AND STRINGERS. FIFTEEN 180“ PATTERNS. 1/8- THROUGH 1" IN 1/16" INCREMENTS. EXCELLENT fuel and engine are already outboard Construction is of balsa and spruce, FOR LEADING EGES. ETC. FOURTEEN90® PATTERNS. the cowl is formed and the landing gear 3/16" THROUGH 1", PERFECT FOR CORNERS AND and the lines are very light. EDGES SUGGESTED LIST IS $49.95 Engine department. There are already is bent to shape. The plans are very numerous 1/2A engine articles in print accurate and factory decals are pro so I’ll keep this part brief. Machine work vided. Designed for Quadra power and or grinding is not needed to get good with a design weight of 15 pounds, it performance out of the TeeDee .049. should be quite a performer. Send $1 for Keep the engine clean and reset the the complete catalog to: Ikon North conrod with the KirnKraft tool when it west, P.O. Box 566, Auburn, WA 98002. starts acting up. Use at least 30% nitro, ★ ★ ★ more is better. Let it wind up on a 5/3 Bootlegger R C Products has put prop. I recommend a Master Airscrew together a foam cutting kit to enable the 6/3 cut down and well balanced. Over hobbiest or club, to easily turn out foam size props don’t let the engine put out wing cores (good forcutting turtle decks full power and they cause too much and floats, too). Consisting of a trans variation in RPM between level flight former isolated power supply, a set of STANDARD PACKAGE CONTAINS ONE ASSEMBLED and maneuvering. power leads that plug into the unit, a DUPLICATOR STICKIBACK SANDPAPER. AND Flying is no different than any other lightweight, two-piece aluminum bow, SEVEN 180° PATTERNS. 1/8" THROUGH 1/2". SUGGESTED LIST IS $19 95 combat job. I have never needed nose and two sets of cutting wires, you now or tail weight on the Pawn. Any adjust have a complete foam cutting setup. “THIS TOOL HAS BEEN NEEDED FOR YEARS." ments have been made at the control And, other foam cutting accessories by IRWIN OHLSSON. ΑΜΑ Hall o( Fame member horn. If everything works as it should, the ‘Bootlegger,’ such as its 48-inch bow GREAT PRODUCT.~ and the ‘Jig Melt,' a foam cutting jig saw BILL CANNON, of Cannon Electronics you might even think you’re flying an FAI. operate perfectly from the power “VERY IMPRESSIVE TOOL “ LARRY & JOE OF J&Z Products I don't plan to enter the kit business, supply. For a catalog on the complete IT WORKS GREAT " but if you wish to sample the Pawn product line, send $2 to: The Bootlegger BILL HALPIN, Aircraft Engineer & Avid Modeler without making all the templates and R.C. Products, 3232 San Mateo, N.E., "CREATES PERFECTLY UNIFORM WING LEADING Suite 105, Albuquerque, NM 87110. EDGES." fixtures, I will supply one set of cores. JOHN ELLIOT. Assistant Editor. Model Builder Paul Smith, 11112 Dill Drive, Sterling ★ ★ ★ Hts., Ml 48077, (313) 939-1076. · Old Timers take note! Kirn-Kraft is back! This will be good news for users of .020 and .049 Cox engines. For a list of Counter...... Continued from page 9 ‘Obsolete’ and other hard-to-find parts, such as LH Tee Dee cranks, double Brisighella’s latest, the Waco ARE, are bypass .049 cylinders with no free- now ready. Wheel pants, molded in one porting, heat sinks, glow heads (new and piece, for the ’Sport, ’Ace, and ’ARE, are slightly used!), Kirn-Kraft front needle available too. EXTRA HANDS COVERING JIG MAKES COVERING valve assemblies and other items, send a A BREEZE WITH ANY MATERIAL. ONLY $15.95 * $2.00 All of the white fiberglass items pro SASE to: Kirn-Kraft, P.O. Box 785, Ana FOR SHIPPING duced by T&D are 100% epoxy resin heim, CA 92805. · materials and fiberglass cloth, no jel- SEE YOUR DEALER FIRST. OR ORDER DIRECT ADD coat resin is used in producing these $3 00 SHIPPING FOR DELUXE KIT. $2.00 FOR STAN DARD KIT DISTRIBUTOR INQUIRIES WELCOME parts. For a current list and information R/C World . . . Continued from page 13 CALIFORNIA RESIDENTS ADD 6% SALES TAX on all of their fiberglass parts, send a SASE to: T&D Fiberglass Specialities, Specialties seems to be able to turn out new cowls faster than rabbits can turn ELDON J. LIND, CO. 30925 Block, Garden City, Ml 48135. ★ ★ ★ out new rabbits, is now offering cowls 2912 Walker Lee, Los Alarm tos. C A . 9 0 7 2 0 for the Pilot line of kits, including the (213) 439-0231 (213) 431-6750 Dynamic Models now has a full range Pitts S-2-A, Decathalon (slightly modi V* S of brass propellers for the large scale fied to cover the Quadra), Christen 64 MODEL BUILDER IL · A ll NewQikeJi Se\m Received Shielded double tuned NE5045 1C Decoder front end colls- with flutter circuit, -inoise filter and voltage regulator Shielded RF Choke- Selmans S042P 1C double balanced mixer Test and tune point extern- Five-Channel receiver shown — one to seven -ally accessible channel operation possible. Dean's connector version available with either End-Block or Pig tail-type connectors. 12G70—Silver 7 Receiver, K it $3 8.95 These receivers are also available assembled w ith or w ithout Years of development have produced one of the finest state-of- connectors. Connector and Switch Harness packages are avail the art receivers ever made. Flight tests all over the country have able for the kit. proven this receiver w ill fly where others fail. Solid, glitch free per P.S. We have lowered our servo prices! W rite or call for details. formance in the air when the plane is at any attitude is the proof of a receiver's abilities.and here's where the Silver Seven receiver excells. SPECIFICATIONS •Weight- 1.4 oz., · Dimlnsions - 3/4" x 1-11/32" x 2-1/4" Those that are familiar with the Silver Seven transmitter's quality •Power Supply - 3.6 — 6V, "Current Drain - 10 ma nominal and performance know what to expect of this new receiver. Of •Sensitivity - Less than 2 microvolts, ’ Image Rejection - 6 db | course, like our Digital Commander, the Silver Seven receiver is com- •Two Signal Intermodulation rejection - 46db, patable with any modern R/C transmitter from one to seven channels •Power Supply rejection - Greater than 40 db and w ill operate any positive pulse servos. Easily tuned with a volt m eter NO TE: Just to make sure there Is no mis-understandlng, this receiver Is N O T a "narrow band" unit. It Is useable with the new frequencies we will be getting soon but will not be useable after the eight year "phase- Jer]odJs_u£i_^atchiiouti^oMahe_c^aimsl BOX 511D ,H IG G IN SVILLE, MO 64037/816-584-7121 Eagle, and both the Hirth and Lycoming Clue two 3/16 keels together (see, batteries and let's go fly after attaching powered versions of the Bucker Jung- maybe it is a hull) and glue into place, pushrods to outside holes in the control mann. Fenders and pants also available sand bottom to achieve flat surface to horns! (The Sandfli tends to be RE for the Pitts, Decathalon and Jungmann. glue hard 3/32 sheet cross grained to SPONSIVE!) Tom somehow found time to build bottom. Glue nose block into place and I’d suggest using the tractor con the Heath Parasol (October ’81 MB) shape body. I covered body with Fabri- figuration only for the first flight if you using his own Model "A ” style cowl. Kote so I could resin a piece of nyrod have opted for the twins. If you build Says it flies like a dream at 11-1/2 onto the hull after cutting a V-groove light, it should weigh in about 27-30 oz., pounds, which includes two pounds of and tacking it into place with Hot Stuff. I and balanced well, it will amaze you at its nose ballast. Tom also found a couple of then masked off a line about a 1/4 inch ability to tear up the sky in a very small drawing goofs which we’ve corrected high around bottom sides of hull and space. When you hand launch keep the on the originals. The motor mount holes resined the whole front bottom area to nose level and it should climb out with are correct as shown on Former #2, but help resist abrasion from landings. After ease. It looks funky up there with two not as shown on the firewall. Also, over 40 flights with essentially no wings, and lands like a dream when you former #6 is now included, though it damage (including landing on con run out of gas. When you fly it on just the wasn't too tough to fudge one as you crete), I feel this is a smart move. top wing (yup it does) the Sandfli will went along. · Remember the ply tongue on the raise your excitement level, just remem lower wing? Now is the time to epoxy ber to hold down the hatch with a scrap of 1/16 and be prepared. With less resis Sand F li...... Continued from page 16 the horizontal strut 1/16 above the body tance and area, things get peppy. Good line and add balsa scrap fill to establish luck and give me your reactions. · kills, you can still fly without interesting where the tongue will fit in the body. changes in direction, since both are on The tongue also serves the purpose of the same thrust line. For twins, you can holding down the hatch cover when the Pattern...... Continued from page 17 modify a two or three ounce tank by lower wings are inserted. Hold the wings cutting a round hole in the rear of the in place by attaching at least two bands force arrangement, thrust line, stab tank to accommodate a typical Sullivan between the screws in the lower wing. placement, etc., but the width varied tank stopper, but instead of using a Over 40 flights have been made using from a slim, inline, inverted engine clunk on the rear stopper, make a tube this method and it has created no shape to a square box shape that with a bend downwards to pick up the problems, as there is little stress in this enclosed pipe and all. The inverted fuel and leave the front end stock to area. Install pushrods, cover top, and engine setup was a pain-in-the-neck feed the front engine. To finish the body bottom of body with 1/16 crossgrained, and the totally enclosed setup made it (hull), measure servos to find out where and glue on tail feathers after covering awkward to get at parts for servicing. The they will be mounted with about a 1/4 and hinging. Complete the hatch cover model shown appears to be the best inch clearance above servo wheels to and brace on bottom to strengthen and compromise so far in that everything is top of body sides. The balance of your resist warping. Watch to allow clearance easily accessible and the lines are rather gear should easily fit in space provided, of servo and pushrod action. Fuelproof scale-like. unless equipment is unusually large. struts and motor mounts. Charge your Now then, if you want to experiment SEPTEMBER 1982 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 65 KIT FF-4 $1.10 ΑΜΑ RACER KITFF-6 $13.50 RAMROD 250 Wine Span: 401/2' KIT FF-28 $1.65 UNCLE SAM Wing Span; 101/4' KIT FF-13 $1.39 KIT FF-22 $5.50 PIGEON SIG TIGER KIT FF-15 $1.69 PARASOL KIT FF-12 $2.50 Wing Span: 18" THERMAL DART KIT FF-24 $5.50 MINI-MAXER KIT FF-25 $6.50 MONOCOUPE Wing Span: 24' KIT FF-2 $19.95 SUPER SINBAD KIT FF-10 $25.50 WITCH DOCTOR 800 KIT FF-3 $9.95 SINBAD 40 KIT FF-23 $6.50 MR. MULLIGAN Wing Area 803 Sq. In Engine: 29 45 KIT FF-16 $23.50 ABC SCRAMBLER Wing Area: 570 Sq In Engine: 15 · 35 KIT FF-26 $7.25 CUSTOMAIRE WingSpan 20-1/2' KIT FF-7 $13.50 WITCH DOCTOR X Wing Area 330 Sq In KIT FF-20 $5.50 Engine .049 051 CABINAIRE See you dealer first! To order direct add $1.00 postage for orders under $10.00. Over $10.00 postpaid. No C.O.D. CATALOG 44 - $2.00 ppd. SIG MANUFACTURING CO., INC...... Montezuma, IA 50171 ^siGir BUY FROM AUTHORIZED SIG DEALERS ^ sigs? ALABAMA GRAND JUNCTION MfMENRY EAST 10NGMEAD0W NEBRASKA KING WARMINSTER ME ΝΟΜΟΝ IE BIRMINGHAM Aero Ra>i Hobbies The Hobby Hangar Bill * Hobby Supplies ELWOOO King R C J C R C Hobbies True Value Hardware Homewood Toy 8 Hobby 1141 N 2 5 lh St 5515 No Wihnot Road 600 N Main Sheet Johnson Lake Manne 8 Hobby Old Hwy 5? I 3 York Road 1512 9 th Street 2834 S 18th StHWt Pia/a 25 PH 312 497 3103 PH 413 736 7711 R R 2 BO· 43 PH 983 3969 PH 215 672 5200 l Mart Shopping C»· CULLMAN GRAND JUNCTION MURPHVS80R0 FITCHBURG LINCOLN NORTH DAKOTA WAYNE MILWAUKEE Chaney's R C Hobby Supplies The Hobby Hut RJ Hobby 8 E»ec Center McMannus Hobbies 6 Nmm· Chick Barnett s Hobby Town GRAND FORKS Hyatt Hobby House Casanova * Mobb* 413 A 5th Si SW 112527 N Ave 1508 Walnut Street 633 Mam St 134 N orth 13th McGittms Hobt»e* Unlimited Gateway Shoppmg Center 1423 S MuskegoAve HOMC WOOD CONNECTICUT OAKLAWN FRAMINGHAM NORFOLK 1228 9 th Ave S RHODE ISLAND PH 414 6 7 2 2700 Homewood Toy & Hobby BRISTOL Pat s H ob tw s 8 Cratts Fisher RC Caauwe's Gun 8 Hobby Shop PH 701 772 5311 NORTH KINGSTOWN CANADA 2830 S J 8th St Bristol Hobby Center Inc 5 7 » W 95th Street 17 Salmi Road 103 N 4 lh Street WILUSTON Hobby Hut BAWLF ALBERTA MOBILE 641 Farmington Ave QUINCY HANSON C 8 C s RC 7442 Post Road Θ 8 P Transport Ltd NEVADA D m · Hobby Craft* Bristol Pla/a Qumcy Hobby Center Hanson Hobby RR 1 Boi87C SOUTH CAROLINA B o. 6 Midtown Shoop ng Center 363? Mame 8 » Mam St (Rt 27 LAS VEGAS PH 373 3953 PH 583 7273 1 OHIO GREENVILLE ROCKFORD PH 293 2804 J J 's Hobby Den CALGARY ALBERTA MONTGOMERY DANBURY ASHLAND The G»eat Escape The Hobby Center Rocklord Hobbies Inc 4972 S Maryland Parkway« Hobby World Canada Modeler* Supply PEABODY Hobby Dispatch 1426 Laurens Road (Mail Order Catalog Sale*! 366 Mam St 615 N Prospect Street Enc Fuchs Hobbws MYRTLE BEACH Bo. 968 Stn M NEW HAMPSHIRE 42 E Mam Suite 204 B o. 7185 GI ASTONBURV ROCKFORD North shore Shopping Center Ed * Hobby Shop CALGARY ALBERTA KEENE PH 419 325 1691 ALASKA Davis Hobbies Wmgs 8 Thmgs WORCESTER Hwy 501 Ne»t to Fan,py PM S Hobby Cratt Leisure Time Hobbies BERLIN HEIGHTS ANCHORAGE For Run Mall 112? Broadway Ray s R C Specialties Sign Company Calgary North MiU Centr« 322 West Street Daniel's Hobbies Anchorage House of Hobbies MILFORD PH 815 963 7363 12 Sherman St WINNIPEG MANITOBA LACONIA 36 Center Street SUMMERVILLE 604 C Street 27? 1043 URBANA PH 757 5883 Cellar Dweller Hobby Ltd Cermo's R C Mobb·*» Enc Fuchs Hobbes BROOKVILLE FWP Hobby Shop 4211 Spenard Rd 243 2643 500 New Haven Ave Pastime HobOtes MICHIGAN 90 8 Bacons Bridge Road No 4 1472 Mam St Lacoma Mall Country R SEPTEMBER 1982 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 67 grained spruce, to make a 1/4 x 1/2 spar ^STERLING MODELS' section, being careful not to have any joints in proximity. This was especially Priced Right For ’82 true when positioning forward and aft spars. ”Real Sporty” The forward and aft spars were posi tioned on the plans. The basswood root rib with maple spars was glued on the built-up spars. The built-up ribs were WARDCRAFT OFFSHORE then cut and glued on the spars and 44" - 38" - 33" - 3V shear webbing was glued in place. The No finer racers anywhere top forward and aft spars were glued in place. The leading edge, 1/2 x 5/8, was C-X Record Holder glued in place. The trailing edge, 1/16 x WARDCRAFT MARINE 2, was glued to the trailing edge of the Kit: FS 38 P.O. Box 2579 Lynnwood, WA 98036 ribs, overlapping them and ensuring a Wingspan: 40-5/16 Frank Ward Dealer Inquiries Invited. good glue joint. Scale: 2-1/8" = 1 Days: (206) 543-6534 All ribs were then capstripped with Price: $45.95 Eves: (206) 775-3969 1/16 X 1/4 medium soft balsa. The wing For: Radio Control root section was covered with 1/16 Control Line (.15- with the new manuevers and an airframe plywood. .25 Engine) which will work fairly well, 1 suggest the Covering materials and cements: 3-25 following based on this year’s foot rolls clear Monokote; 3-6 foot rolls experimenting. transparent blue Monokote; 1-6 foot per Vagabond” 1. Design around a wing loading of 25 roll transparent red Monokote; Hot oz. per sq. ft. or less. Stuff (ribs, planking, and capstripping); 2. Useable engine thrust should easily Formula II Hobbypoxy; (joints,fuselage, exceed total model weight. shear webbing, plywood covering, 3. Flaperons definitely help but wing center section, laminations). require a little tinkering. Thanks to Frank 4. Retracts are not mandatory, but I started the project in the fall of 1977 large wheels cause a drag problem on and finished it in the fall of 1980. During fixed gear. the three years the plane was under Kit: K7 5. Try to concentrate all weight as construction, I thought about a name. Wingspan:33 close to the C.C. as possible. This goes As the plane was directly descended Price: $24.95 for lateral direction also. from Frank Zaic’s Thermic 70, it seemed For: Radio Control One more point which may be of to me that the appropriate name would Control Line -049 eng. interest is that the horsepower per be Thermic 210 . . . if Frank approved. pound of some of the new .40-.46 size 1 wrote to Frank and told him about Free Flight (Rubber engines is as good or better than current Power) my project. I asked him if I could use the .60 size engines. This makes them an word "Thermic.” He wrote back, giving excellent choice for this type of aircraft. me the go-ahead. In fact, he said any I hope that we have generated some other name would cause raised eye PENNY enthusiasm in you to experiment with brows. He also said "Don’t kit it.” I the new F.A.I. pattern. If we accept it as a assured him I didn't think any other PINCHER challenge in precision flying rather than builder would attempt a model on such Wingspan: 13' a threat to pattern flying we may all a large scale! CHOOSE ANY ONE OR ALL SIX find that it’s really fun! · Frank and I still correspond . . . any HELLCAT CESSNA 180 one who's ever corresponded with MUSTANG SABRE JET PIPER CUB T38 THUNDERBIRD Thermic...... Continued from page 19 Frank and read his books, knows he is as great a writer as he is a designer and Next, the vertical stabilizer was glued aeronautical engineer. on, and the wing root rib with hard rock He frequently asks, "Have you flown it maple spars was aligned and glued while yet?” $1.98 in position in the fuselage, and then Not yet, but soon, when the time is EACH removed. right. For mail order from an auth The fuselage was then turned upside Without Frank Zaic there would be no orized Retailer, send $1.98 Tor down and the bottom bulkheads were Thermic 70 and there would never have each Penny Pincher plus $1.00 glued in place. All bulkheads and for been the Thermic 210. · minimum Shipping. Add $1.50 mers were built up out of 3/8 inch balsa for more than one kit. and reinforced with 1/16 or 1/8 inch Choppers . . . . Continued from page 21 plywood. Catalog Request Top and bottom stringers were made pitch to lift off, the outer arm (hooked to Catalog of entire line of airplane of 5/16 inch hard balsa. The keel is 1/2 x throttle) gradually swings forward to control line model kits, R/C scale 1/4 spruce laminated to 1/2 x 1/2 and give enough throttle to overcome the & Trainer Kits, boat model kits, capped with 1/2 x 1/8 balsa. increased drag generated by increased accessories etc. $1.00 enclosed. The bottom of the front fuselage was pitch. The unit is adjusted so that at full Secrets of Model Building & Con covered with 1/16 inch plywood and collective pitch the throttle is full open. trol Line Book - .50 each. fiberglassed. The nose block was carved Now when you make a rapid descent 1st Class mail delivery, add $.50 and sanded to shape. the pitch comes out and the engine rpm U.S. & Canada. Air Mail to WINGS stays up where is should be. The engine other countries add $1.65. After the jig was made, the total and rotor do not fight each other as Send To: STERLING MODELS number of ribs to be made up for both before. 3620 "G” St., Phila., PÅ 19134 wings were as follows; 12 ribs standard, About the only disadvantage of this N am e______10 ribs spoiler recess, 28 taper ribs (two system that I can think of is that you need Address______from each pattern). one servo for collective “ Y” connected The wing spars were made by lami to one servo for throttle. (Of course the C ity _____ .State. .Zip. nating two pieces of 1/8 x 1/2 straight aux. servo is separate.) This really isn’t a 6 8 MODEL BUILDER C A M A R O F3B AMPERE F3E FOCUS F3B This Is EISMANN** newest F3B model. A formidable con* An Electric motor powered high performance Sailplane An International favorite in F3B and winner of many tender already having taken some First places In European designed around electric motors of 200-600 watt, GEIST or contests. competition. This model uses a Wortmann airfoil which Is Keller Motors. The fuselage will hold up to 22 1.2 amp. cells. The kit contains Epoxyglass fuselage and canopy. Wings are proving to be very efficient, also has canopy speed brake The kit contains an epoxy fuselage, canopy speed brake, rear foam, balsa covered. Ailerons are cut out and utilize torque- The kit contains an epoxy fuselage, foam wings covered in access hatch fo r servo and receiver W ing is foa m covered In tube linkage. Stabilizer and rudder are finished and sanded Obichl wood, ailerons are cut out. tail surfaces are cut out Obicl wood. Ailerons are cut shaped and sanded. Kit to shape Kit includes plans (German instructions), all shaped and sanded. Includes necessary hardware and contains all necessary hardware. Detailed, plans (Instruc necessary linkage a nd hardw are and 1 .0 0 0 grams o f ballast. detailed plans. (Instructions in German) tions in German) Span 2 8 0 0 mm Fuselage Length 1 2 9 0 mm W ing Area 5 6 1 D M 2 Span 2 5 5 0 m m W ing A rea 6 0 .1 0 DM 2 W eight 1900-3400 G Length 1 3 6 0 m m Weight 2000 P M o tor 200-600 Wan W ing Area 5 5 4 D M 2 Airfoil Wortmann Fx60/100 A irfo il E ppter 3 8 7 m odified W eight 1 9 0 0 G. Price ...... $ 2 9 5 .0 0 Price ...... $ 2 9 9 .9 5 A irfo il Eppler 387 Price $ 2 7 5 .0 0 STOCKED Exclusively in the U.S.A by: WILSHIRE MODEL CENTER 3006 Wilshire Blvd., Santa Monica, CA 90403 (213) 828-9362 exclusive models Hours 10-5:30 Mon.-Fri. 10-5 Sat. Closed Sun. / Visa & MasterCard Accepted disadvantage to me as I’ve been flying SIRIISCAU 1920 RUNABOUT\ one servo on each function for years. It’s (hEW·1 po n y-b u m p II- It. RADIO C0NTR0LUD RON-RIGID AIRSHIP worth it because the throttle throws can PRACTICAL SIZE Can Lift 28 O r; U»e Standard Radios easily be adjusted without affecting (3 or 4 Channel): Requires only 80 Cubic F t of Helium (Helium Available collective settings. And if one servo at Welding Supply Shops). should fail, you've got a backup that will FULL CONTROL Modem Thrust-Aerodynamic Control — I enable you to get down. Forward. Hover. Backward. Elevation. To be a bit more specific about the Turn. Ballast. Helium Release. COMPLETE KIT Formed Plastic: Die-Cut Balsa and separate throttle servo: Once you open <9JO ΛΛ Plywood Parts; Mounting Hardware: the aux. function to go from idle up to ' * Wire: Plugs: Switches: Book Explain ing Blimp Operation: Detailed Plans lift-off rpm, you need just a little throttle and Many Photos; Completely Fabri as you advance throttle/collective from cated Vinyl Helium Envelope. (Electric Motors. Radio and Battenes flat pitch to near hover pitch. (Light on Not Included) the skids.) But as you go from hover to NOW YOU CAN FLY YOUR OWN full collective you need much more ELECTRIC POWERED BLIMP! COMPLETE CATALOG $1.00 throttle, enough to fully open the MB carburetor. P. O. BOX 2498 -MB LA MESA, CALIF. 92041 So the separate throttle servo is set to Peck-Polymers PHONE (714)469-8675 or (714)442-4636 add a little throttle from low to hover, and the rest of throttle from hover to a in photo #4. This will vary depending on loading to supplement the new 4.44 cid full collective climb . The throws are set what type of helicopter you have, and ruling and help keep us on the safe side. up as shown in Figure #1. how much collective it can deliver. Just We know that an excessively high FINAL SET-UP AND FLIGHT TESTING make sure you have the collective “ feel” wing loading results in a higher stall With aux. retarded the engine should set before you make these final adjust speed and narrower speed envelope for not run. Crack open aux. function ments. any given aircraft. . . which makes for a slightly to start up. With aux. function If you make a rapid descent from bird that's neither safe nor enjoyable to full open (and collective/throttle full forward flight and the rotorover-speeds, fly since it’ll have to takeoff, fly and crash low) set the throttle at approximately you have too much aux. throw. (At full all at .9 Mach. We also know that 3/8th open. As collective/throttle is aux., low collective, reduce the throttle because our BIG Birds closely approach advanced from full low to 1/2 stick (lift barrel opening slightly.) If the rotor the efficiency of their full-size counter off), the throttle barrel should open speed drops off on descents you don’t parts, wing loadings in the 35 to 40 ounce slightly more, up to 1/2 or 5/8th: Lift off have enough aux. throw. (Open the per square foot region are okay . . . and power for hover. As collective/throttle throttle a bit more at full aux., low that anything less usually results in too is advanced to full, the throttle barrel collective.) much of a floater with the attendant must open to full also. Set you linkages Once this is set, full collective travel lousy penetration. As a matter of fact, to achieve these baselines. limitations can be set as normal. Start a most aircraft with close to 2000 squares Final adjustments must be made from full power vertical ascent. If rotor speed or more can usually handle a W/L that flight tests, and this is very simple to do. drops off, reduce top end collective closely approaches 50 ounces per square But let me throw in this “ caution” : Since throw. If rotor speed increases, increase foot without any real problems. rotor speed will now be much more top end collective throw. But without some reasonable para constant in all areas of flight, you will Thai should about cover it. It’s a fairly meters or guidelines, too many guys are need more collective throw to give crisp simple concept that gives excellent going to build a “ lead sled,” and then try response. For instance, you'll probably results. If you're a competent pilot to fly the damned thing. What we have to run a few degrees of negative looking for a little extra, I'd urge you to certainly don’t need are any more pitch at low collective if you really want a try the Quasi-Governor. Then send grossly overweight birds with sicken- quick descent. Otherwise the collective some photos and let me know how you ingly high wing loadings like the Grum feel will be rather soft and too smooth. like it. See you next month. · man Goose that crashed at Clearlake, On my Super Mantis I had to increase California, in June of ’81. This 156 pound collective throw to give crisper re Big Birds...... Continued from page 23 monster only had a span of 13-1/2 feet, sponse. These extension arms are shown and according to the specs, its W/L had SEPTEMBER 1982 WHEN CONTACTING ADVFRTISERS. TELL ’EM MODEL BUILDER SENT YOU! 69 control system works (BIG Birds, May ASTRO CHALLENGER COBALT MOTORS ’82). IMAA CHAPTER 58 SUPER POWER FOR WORLD CLASS COMPETITION Otherwise known as the Montgomery County Barnstormers R/C Club, Chap We built our first cobalt motor in 1975 for our SOLAR-powereO unmanned .irplane SUNRISE. The SUNRISE motor weighed 16 ter 58 operates out of Conroe, Texas ounces and produced 3- 4 HP Last year we built the SOLAR (you mean to say that you never heard of PROPULSION SYSTEM FOR THE DUPONT SOLAR CHAL Conroe?), and had a great “ Boss Bird” LENGER that made its histone flight from Pomtoise. France, to Fly-In back in April. I plumb ran out of Mansion. England, on July 7. 1981 The SOLAR CHALLENGER COBALT MOTOR was only three inches in diameter Out time and didn’t get to make B&W prints delivered almost 3 HP" By using this advanced technology from the color negs that “ The Barn we bring you Our new ASTRO CHALLENGER COBALT stormer Journal" editor Randy Getchell MOTORS, super-performance motors for the serious sent; however, he also included a few competitor for the modeler who demands the best and simply won t settle for second best The heart of these B&W prints that I am using this month... motors is the new high-energy, rare-earth COBALT Randy’s Cub is from a Balsa USA kit, magnets They supply much higher magnetic flux and are powered by an O.S. .91 and finished with not damaged by overloading To efficiently utilize this Coverite and K&B Superpoxy; nice magnetic potential we have incorporated (1) a high-grade silicon steel armature lamination (2) a high-performance Challenger 0 5 .. . $75.00 flying airplane. The fine looking Deca- commutator capable of running at 35.000 RPM and 350*F and Challenger 1 5 .. $100.00 thalon was built by Bob Hamilton, who (3) a new silver graphite cartridge brush that can safely Challenger 2 5 .. $125.00 decided on an Evra 190 for propulsion. commutate 25 amperes The net result is a really super-power motor that is ready tor world class competition THE NEW Challenger 4 0 .. $150.00 Like Randy, Bob went the Coverite/K&B ASTRO CHALLENGER COBALT MOTORS - NOTHING ELSE Motors made to order,Please Superpoxy route and ended up with a COMES CLOSE!! allow 30 days for delivery. great flying machine. Randy mentioned ELECTRIC WINNERS at the 1982 Send stamped self addressed that he was "really surprised at the NATIONAL F/F CHAMPIONSHIPS envelope for specifications to: performance that Evra put out. The v\ 1st - Jim Ogg (Astro 035) Decathalon is most realistic in the air as ^ 2nd - Jim McDermoth (Astro 020) p? 3rd - Tony Naccarato RSTR0 FLIGHT in c well as on the ground . . . and I don’t (Astro 050 Challenger) 13311 BEACH AVENUE VENICE. CA 90291 suppose I need to say anything about those fantastic Pilot kits.” As you can see from the two interior NO TIME TO BUILD? at least it’s gonna slow it down one shots, both Bob and Randy spent some TRY OUR OLD TIME" F/F-R/C AIRCRAFT helluva lot. Here are the specs: Span, time getting their cockpits to look like FULLY ASSEMBLED COMPONENTS 14'-9” ; Length, 10'-6"; Weight80pounds; the real thing. Randy put it very well: Covering (donated), Top Flite FabriKote " . . . a light plane model just doesn’t (lite); Radio (donated), Kraft (three seem to capture the mood without some receivers and packs); Wheels (donated), kind of inside.” ANNCO; Retracts, Hand Made, Rotate The Cub, especially, got me feeling 90 degrees (scale); Power, RM Titans (13 very nostalgic since I racked up quite a HP); Weight Per HP, About 6 . . . no few hundred hours in that bird back in sweat; Construction, Foam wing and tail the late forties . . . which was just before covered with ply; fuselage planked over I started flying for Uncle Sam. IDEAL FOR BEGINNERS & EXPERTS lite ply formers and filled with foam. Hey, you tw o!!!! Sure hope you don’t 72" Span — 29 to 40 Engine Size (Less Wheels) Fuse weighs about ten pounds and fly those BIG Birds without people in the 2-3 Channel Operation, or F/F Quality Built Components of Balsa. Spruce & Ply Clancy says he can stand on it. cockpits. .. Formed Spring Steel Landing Qear/Tall Wheel Assembly. Have no idea whether or not Clancy MEANWHILE... FULLY FRAMED - UNCOVERED $139.95 COVERED - SUP MONOCOTE - plans to kit this Aero Commander . . . Back at the ranch, our very own Robin COLOR · TRANS BLUE/YELLOW $239.90 (along with his Super Fli and the Zlín). I McCeorge did an outstanding job on AU A/C $Λ»ρρ·β UPS. Add M 00 Sh'PfHio'Mandiing M )f* UTAH RESIDENTS know one thing: I'm gonna be there at Parker R/C Planes’ fiberglass Cessna 172 BEEHIVE R C MODEL AIRCRAFT CO. BOX TAX. LAYTON. UT M M 1 D ****r trx }u '" t kitrtød Ida Grove to watch this beast fly and Skyhawk (which to the best of my knowl "ooh and ahh” alongwitheveryoneelse. edge is no longer in production). FLY WHERE? A Quadra swinging a 19x8, and an to be breathing hard on 100 ounces per At the Philadelphia Navy Yard, of Eastcraft Starter help keep the balance square foot; hardly a recommended course, where there’s plenty of room for point up forward where it belongs. This W/L for anyone, regardless of the BIG Birds... BIG Bird features RAM strobe, nav and amount of power crammed into the two At first I thought Tony Della Vecchia landing lights, an air operated nose nacelles. That's playing Russian Roulette was trying to “ green" this country boy; brake (on the down side of the elevator), with all the chambers loaded. after all, I’ve been to a number of Navy Fowler flaps and a full cockpit interior. If AMA can’t, or won’t, change their Yards, and, in fact, have seen the one at As I’ve mentioned many times before, BIG Bird standards, then the IMAA Philly, also. But I guess I hadn’t been I’m not a scale nut, but I can sure should establish reasonable engine and given the complete tour because the appreciate the kind of craftsmanship wing loading parameters. . . because if Flying Squires R/C Club does in fact tear Robin put into that Cessna. It's a very we aren’t vigilant and police ourselves, up the sky there at least once a week. impressive bird . . . on the ground and in we’re going to wake up one morning From the pix, it seems that the “ pit and the air. and find that non-modelers are doing it runway” areas are kinda rough . . . but REWORKED QUADRAS for us . . . and that, friends, will be the Tony swears that no one has had any If you need more power than the beginning of the end! real problems. standard Quadra can deliver, but don’t ★ ★ ★ Tony’s been flying his Nosen Big Stick want to mess around changing to an “ Estimate this BIG Bird to be the best for about two years now (it was his first other make,and/or don't wanttospend performing giant in the world . . . bar BIG Bird), and thinks it’s a terrific flying any more than you have to . . . then NONE!!!’’ Them is mighty big words, machine. "It flies good, and it flies consider having your present Quadra but Clancy Lintner, of Ohio Superstar gentle,” according to Tony, who uses an reworked by US Quadra. You're really Products, Inc. sure makes it sound 18x6 on the Quadra. You might want to gonna be surprised... convincing. try both a 16x7 and an 18x8, Tony; either I’ve got two of these "Dario-ized” This scale Shrike Aero Commander or both of those props will probably engines, and both of them are putting was designed by Clancy and built by make the plane fly even better. out a healthy 22 pounds of thrust, which Larry Stillo . . . and according to Clancy, And by the way, Tony’s tickled pink is four pounds more than an out-of-the- if it doesn't stop the show at Ida Grove, about the way his Gold'N Rod push-pull box Quad can manage.Powerwise, my 70 MODEL BUILDER SETTING STANDARD Leading the way for years with innovative and trendsetting designs American R/C Helicopters has set the Standard of Excellence with the intro duction of the Mantis. Very popular, this .40 powered R/C helicopter offers a whole lot more than it’s modest price would indicate. Precision craftsmanship and high quality provides performance that can’t be beat! In-house production puts us a step ahead. Our quality is uncompromised and our service unparalled. As manufacturers we have an extensive inventory, so you won’t find yourself waiting for that overseas parts shipment. We pride ourself in our courteous, reliable service. Compare and discover for yourself the exceptional value that is built-in each and every helicopter we sell! DEALER and DISTRIBUTOR INQUIRIES INVITED . . . WT SPECIFICATIONS: SUPERMANTIS ★ Rotor Diameter - 4 \ W COLLECTIVE PITCH Collective Pitch ★ Tail Rotor Diameter - 9” MANTIS MODIFICATION with functional ★ Length (nose to tail) - 43” Fixed Pitch Converts Mantis mechanical tail ★ Height - 13 Vi” $189.00 to SuperMantis rotor compensation $85.00 $225.00 ★ Weight - 6 lbs. Prices subject to change without notice. ★ ★ ★ A m e r i c a n For Further Inform ation Call or W rite: (714) 744-7533 ^ R /C H e lic o p t e r s , In c . 635-11 North Twin Oaks Valley Road ★ San Marcos. CA 92069 "Super” Quads are just about on a par date you with a set. with the 2.44 Kioritz . . . and weigh The kit was not designed for anything CANNON almost two pounds less. Neither of my else but a sixty, which, by the way, does ''------^ R/C SYSTEMS engines have too much time on them an admirable job of powering the [ 7 (yet!); they’re both taking turns in a Big Aeronca. I seriously contemplated using 13400-26 Soficoy Sir#·» Stick, and really make the Stick perform a Quadra at first, but just couldn’t see North Hollywood, Calif. 91605 much like the sixty powered version. how the airframe would stand the gaff Phon# (213)764-1488 And for those who’ve been waiting for without being strengthened to the point SUPER-MICRO FLUE PACKS the 50cc Quadra to make its appearance of becoming severely obese. So she . . . take heart. USQ hopes to start flew for over two years with a vintage '68 shipping the engine by late September Enya sixty pulling all 15 pounds around or early October. When this BIG Quadra with relative ease . . . even during our does appear at your front door, it'll have hot Texas summers. a new style carb, a better piston . . . and If you really want to make yours gobs of power. And according to Dario, scale, or if you want to scratch build it'll be priced under $200. Nice, huh? from scaled down factory drawings, THE FLYING BATHTUB write to Historical Aviation Album, P.O. World's Smallest R/C Airborne Units w ill It seems that I’m not the only one Box 33, Temple City, CA 91780, and ask work wifi' most Standard AM Transmitters who's got a "thing" forthe Aeronca C-3. about the All American Series, Volume of other Mokes! Equip your small aircraft I keep getting letters and calls for more X. It contains a wealth of information, with a SUPER-MICRO Flite Pock. info about my airplane, so I figured I'd pictures and drawings about the C-2, Flite Pack includes SUPER-MICRO Rx do it the easy way and include all the C-3 “ Collegian” (that’s what mine is), (.54 o z.- 15.3 g r.), MICRO Servos (.47 poop in this month's column. and the C-3 "Master.” And by the way, o z . -1 3 .3 g r.) and choice of BATTS, 100 Mine was built from a Balsa USA kit she flies just like her full-size counter mah (1.42 oz . - 4 0 .2 g r.) or 250 moh about three years ago, and appeared as a part: ailerons are not too effective and (2.25 oz.-63.8gr.). F&B in MAN (Oct. ’80)... which was just you gotta coordinate to make her look Channels Weight Cost about the time that Balsa USA discon good in the turns. The big rudder allows 2 2 .9 o z .(8 2 .3 g r.) $169.95 tinued the kit. There was a lot of interest cross-controlling and she’ll slip into a 3 3.39 oz.(96.2 gr.) 207.50 in the C-3 at the time, and I thought it landing with ease. 4 3 .8 8 oz .(110.1 g r .) 244.95 was going to be put into production My C-3, started over 72 years ago, is again . . . but no soap. still in the works. It's the razorback, flat- Shipping, Handling - S5.50 . 27or 72 I meant to keep the plans, but acci top rudder version, and plans just need MHz; other frequencies $10.00 higher. dentally threw them out when I got updating for building modifications In Calif. Add Sales Tax. No C .O .D .’s, carried away with spring cleaning my made during construction. Plans were Brochure 60ς in U .S ., $1.70 Foreign. workshop. Quite honestly, the plans made from prints of original water- 4- 1/2% Surcharge for were not that good . . . but you might try stained (Johnstown Flood of 1937) draw Visa or Master Card. Balsa USA and see if they’ll accommo ings, and are accurate. Gonna finish it up SEPTEMBER 1982 WHEN CONTACTING ADVERTISERS. TELL ’ EM MODEL BUILDER SFNT YOU! 71 makes it easier for me to know when to take a second look so that I don’t get SWEITZER ENTERPRISES caught short. 1925 S.E. OAK. H ILLSBO R C) , OR . 97123 LAST CALL FOR THE IMAA FLY-IN In fact you may have run out of time if your reservations haven’t been made up in the Ida Grove area by now. And are PROUDLY PRESENTS ! you gonna be sorry if you don't get to take part in the biggest and best fly-in 96" WINGSPAN ever! This is really gonna be the SCALE I 2"= 1 -0 ' “ Gathering Of Eagles,” and is bound to set the standard for years to come. To find out if you can still make it, send your query and SASE to . . . Don God 4 Sheets - frey, 254 Washington Street, Bingham 3Ft. X 9 Ft. ton, NY 13901. And if you’re not an IMAA member yet, don’t worry; all you’ll need (in addition to your BIG Bird) will be a current AMA and FCC license. LIKE ’EM FAST AND GROOVY? Then the Super Sun Ray may be just D.H.89A " DRAGON RAPIDE " the ticket for you. She comes in at about THE FINEST SCALE R/C PLANS 20 pounds, and even with a Quadra, performance is impressive. I’ve seen one ■ COMPLETE WINGS SHOWN ■ ( Fiberglass Cowls & Canopy fly (powered by a reworked Quadra) ■ FULL SCALE INTERIOR Available Soon ) and she moved around the sky like a INTRODUCTORY PRICE S3S.50p.pd. large pattern ship. She’s a guaranteed PRICE INCLUDES MAILING TUBE · ADD S3.00 FOR AIRMAIL eyecatcher on the ground, also, due to her lower inverted gull-wing. Ron Magnum, P.O. Box 8244, Greens A TTEN TIO N % SCALERS boro, NC 27410, has got the plans and all EPOXY GLASS COWLS FOR: the information you need. This is an all NEW KIT FOR NOSEN PICA S'D MORGAN BAtSA USA PLATT CONCEPT wood aircraft (no foam), and according FLEET HOSTETLER PCM T CRAFT S h EPER PiTTS 'Λ b % CONTROL LINE SCALE SUPER CUB f O KKER D 7 BOE'NG P 92 P 26 F4B2 to a buddy of mine, it builds surpris F4S4 SPARROW HAWK CEE BEE MOD V" M A C B R lE N S ingly fast. And like most bipes, she's a TURBULENT CHRISTEN EAGLE BRiSlGHELLA S STARDUSTFR F4F WILDCAT II '■· SCALE J3B> BABY Fl y BAB y AIRCAMPER PILOT rather compact package which makes JUNG MANN 1 3 5 SCALE b OTHERS PROFILE CARRIER for easy transporting ... and there are BIG C000YEAR WHEEL PANTS FOR SPORT TVPE RACING no wires or braces to fuss with. CITABRIA STAROUSTERII PITTS SKYBOLT LIBERTY SPORT OR CHOMPIN’ AT THE BIT! CHRISTEN EAGLE P 6 E HAWK STEARMAN STINSON SR 9 JUST FOR FUN! MULLIGAN b OTHERS It's the tail end of May as I’m writing this, and already I’ve got ants in my pants BRAZED & HEAT TREATED WIRE GEARS!» CABAN ES LARGE SCALE PLANS AVAILABLE R olLif M otleÍ PvuhtcU just thinking about the IMAA Fly-In Send S A S E tor latest list P. 6. βαχ U68 Festival at Ida Grove. I feel like a high We supply Modelers with fiberglass parts for your Pznnett, & 80)02 school kid about to go out on his first plans— Write or call us i -303-6** -37/5 real date; I'm anxious and can't w ait. . . but I’m gonna have to ’cause there are T f t D FIBERGLASS SPECIALTIES dealer inquiries invited 30925 BLOCK GARDEN Cl TY Mi 48135 three whole months to go yet. PHONE (313) 421 6358 It’s gonna be great saying hi to so many old friends, and I’m sure looking one of these days, and will make plans than the same machine with a higher forward to meeting all you guys who've available, wen wing loading. been writing and calling. I wonder how My flying bathtub is now being used And in case you've forgotten how, or many of you are gonna turn out to look for testing diesel conversions, ignition are just getting into R/C, here’s how to anything like you sound over the phone. conversions (more next month) and four figure your W/L: You know how it is sometimes; the strokers . . . which reminds me to re 1) Multiply chord by span to get your deepest, heaviest voice often belongs to mind you that you’ve got a lot of differ wing area in square inches (for a rec the smallest guy . . . Anyhoooo, be ent kinds of engines to chose from for tangular wing platform); for a tapered seeing you at Ida Grove! that next "special” BIG Bird, starting wing, multiply the average chord times TIP OF THE MONTH with that sixty and/or ninety that you the span. Well, not really .. . Instead, I've got an already have. Swinging a 14x4 or a 14x6, 2) Then divide the wing area by 144 interesting bit of information to pass your present big methanol burner will which will get you down to square feet. o n ... easily power a 13 to 15 pound Cub, 3) Figure out your aircraft’s gross Betcha didn't know that virtually all Champ or Citabria. Of course if you’ve weight in ounces, and divide that num R/C folks are bilingual. Yup, it’s tru e .. . got money to spend, you might want to ber by whatever number you arrived at and that includes you. It seems this all consider the Tartan, or any of the four in step #2 .. . and that’ll be your W/L in came to pass when a Jewish astronomical strokers that seem to have popped up ounces per square foot. As I mentioned observer noticed an unexpected change within the last year or so. You might earlier, I consider any BIG Bird W/L that in the rotation period of a neutron star; even want to shoot for the Gemini Twin, falls between 35 and 40 to be right in the it appeared as though there had been a which is a dandy piece of machinery and ball park; anything lower than 30 and sudden slip. In referring to this collo lends itself well to giving a number of you’re prone to have a real floater on quially, he used the Yiddish word for scale birds that extra bit of “ frosting” your hands, and anything over 50 is a “ slip,” which became part of the scien . . . Whatever you do decide on for an bound to be a “ lead sled” with an tific vocabulary. Then, the next thing engine, put some effort into keeping extremely high stall speed that makes it you know, we adopted it and, in no time your wing loading down; you won’t be an accident looking for a place to at all, made it a very common, everyday sorry. A BIG Bird with a low stall speed happen . . . None of these numbers are word. and wide speed range is gonna be a hard and fast because aircraft vary so So next time you start screaming whole lot safer and more enjoyable to fly much . . . but using these parameters about a “ glitch,” do it with your best 72 MODEL BUILDER ΒΟΗ IMAGINATION A FOOTPRINT? — NO! IMAGINATION PUT TO GOOD USE? — YES! The imaginative 'Back Plate Design on the HB.25 gives you the choice of how to mount the engine. RADIAL or BEAM MOUNT, whichever works best! TOP PERFORMANCE ON F.A.I. FUEL! This is just one of the things that makes the HB.25 The HB.25 features Double Ball Bearings, more than just another face in the crowd. Vax28 Shaft, Perry Carb and it's complete with a Muffler of its own. Write for FREE COLOR CATALOG 'Other HB Engines with the Integral Radial and Beam Mount feature are: HB.20. HB.15 and the HB.12, they HB-ENGINES also come complete with Mufflers. Made m W. Germany BAVARIAN PRECISION PRODUCTS CO. · Ρ Ο Box 6 Dept C. New Canaan Connecticut 06840 Yiddish accent; even if you don't look cylinder, and then down and out the no wash-in, the opposite type of twist Jewish, you might as well sound exhaust. This flow pushes residual (root rib trailing edge higher than the tip authentic. burned gases ahead of it, and if the rib trailing edge). I put in the washout by Keep those letters coming, guys; and timing is right, relatively little of the twisting the panel in the direction that I don't forget about sending some pix. fresh gases escape. want it to go, then I iron out the wrinkles Preferably B&W prints, but I can make Toaay, variations of the basic in the covering. Then check that you decent B&W prints from good color Schneurle porting are universally used have the twist that you want. The cover negs (I promise to take good care of your in high performance two-cycleengines. ing will hold the wing washout pretty negs .. . like they were mine). Al Alman, The most popular version employs a well, but it should be checked occasion 2609 Burningtree Ct., Arlington, TX third transfer port usually referred to as a ally, especially if the sun heats up the 76014. · boost port. It’s located on the rear wall covering, which can cause it to loosen or between the two main transfers, and it tighten. Fuel Lines . . . . Continued from page 24 directs gases upward directly at the top Now for the rudder, fin, and stabilizer. of the cylinder. Of course, there are The rudder is just a simple sheet of 1/8 model engines, this is usually just a baffle other variations, but the basic loop balsa (check the weight). The fin is built on the top of the piston. Take a look at theme is still the same. up from 1/4 square balsa and 1/4 inch the first drawing. It’s an ultra simple I suppose one could facetiously say sheet. The 1/4 square balsa should depiction of a cross-flow system. This we've come a long way in 55 or so years. weigh about 1/4 ounce for a 36 inch long works reasonably well, and provides Actually we have. Although the two piece, the 1/4 inch sheet should weigh nice broad range throttle response, but basic designs haven’t been changed about 2 ounces for a 3x36 sheet. A small at the expense of degrading the shape of radically, there have been tremendous diet or postal scale is handy for this, or the combustion chamber and piston improvements in cylinder heads, fuels, just compare sheets by holding them at crown. Realizing this, the engine de lubricants, metallurgy, induction, and one end and flap them a little, like a signers who wanted really high power, exhaust management to mention only a diving board. The heavy sheets will feel tried many porting variations which few. Today’s high performance two- heavy! used essentially flat crown pistons. None cycle engine is extraordinary compared The vertical fin post is 1/4 inch spruce were eminently successful until the mid- to those of Dr. Schneurle's heyday. (or basswood). Cut out the pieces and 1920's. As you can well imagine, I've related assemble. Bevel the rudder leading edge SCHNEURLE PORTING very little of the complete story of and the trailing edge of the fin down as In 1925, a German by the name of porting, but hopefully my brief descrip far as the height of the rudder. Lightly Schneurle devised and patented his tions have been broadly informative. sand all edges with the emery board, a loop scavenge system of ports. The Guys, next month, it'll be the third lot of rounding is not needed, just take second and third drawings show this port of three-port, two-cycle engines the edge off. Cover the fin and rudder basic design. As you can see, the facing . . . the intake. · together with one piece per side, with transfer ports direct the incoming gases about a 1/16 inch gap between, so that against and up the rear cylinder wall Brigadier...... Continued from page 27 the covering is the hinge as well. This opposite the exhaust port. The fresh makes a very free hinge, seals the hinge charge then loops over at the top of the gap, and it is easy to repair with scrap SEPTEMBER 1982 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 73 fuselage longerons. Leave 1 /8 inch space on the top of the longerons for the fuselage side insets. Inset the 3/32 side NOW AVAILABLE!! ™sthae panels, just flush with the outside of the M O T O f,, iongerons. Now pull the tail ends together, and tape or clamp them. Lay the fuselage flat on the table and mea sure the distance from the table to the fuselage end. Turn the fuselage over and lay itflatagain,and measure the distance again. If the two measurements are the same, the fuselage is straight and true, so glue the ends together as is. If the measurements are not the same, adjust the ends and repeat until the measure ments agree. Install F-1 with five-minute epoxy, making sure that the notches in the sides line up with the cabin pieces, and that the notch in the top is centered. Cut the CMB/60RC W/TUNED PIPE CMB/90 MARINE W/TUNED PIPE side stringers to length, and taper the ends. Glue on the side stringers, then List - $259.95 SPEC. - $159.00 List - $359.95 SPEC. - $289.00 add the four F-4 pieces. Cut out the HANDCRAFTED QUALITY cabin window balsa pieces, and glue COMPETITION PROVEN immediate Delivery them flush with the F-4 pieces and the outside edge of the side stringers. Install Distributed by: Ph. (805) 589-0554 the F-3 pieces and the F-2 piece, and TEJA ENGINEERING, Rt. 9, Box 399N, Bakersfield, CA 93309 glue in the 1/4 square balsa piece for the notch at the top of F-1. Install the front windshield balsa cowl pieces. Glue in Η . , AUTHENTIC hinge, as in the rudder and fin. Trim the the front wing dowel and the rear wing covering off the gap between the two dowel. Install the front cowl pieces F-7, I rOCTOr v4 s c a l e k it root ribs. Now check the fit of the fin F-8, and F-9 next. These are glued to F-1 with the stabilizer. The notch in the front and the side stringer. The top pieces will of the fin should evenly engage the front keep them from cracking. Grooving the spar of the stabilizer when the fin rests undersides will also make bending squarely on the stabilizer. Check this easier. Plank the bottom of the cowl up and cut or fill the fin until it does. Drill a to F-9 with 3/32 balsa crosswise. 1/16 hole in the center of the stabilizer Now the nose is all closed in, so you trailing edge. This hole is for a wood are wondering how to mount the motor! screw that will hold the stabilizer to the Have patience! Cover the fuselage, the fuselage. sides first, then the top and bottom. I 1918 NIEUPORT 28 Cl Last, the fuselage. Most of the fuselage used transparent yellow Solarfilm for the A beautiful, smooth flying W.W.1 classic machine, is built from 1/4 square balsa, use the dramatic effect. Cut the cabin windows 80 in. wingspan, 15 lbs., using .91 engines and up. weight guidelines, about 1/4 ounce for a and windshield from thin celluloid, and SPECIAL EDITION KIT S 329.00 (contain· some 1300 parts and a very detailed construction manual) 36 inch long piece. The top longeron of glue them in place with RC 56 glue or PROCTOR, P.O. BOX 1333, LA JOLLA, CA. 92038 the cabin is spruce or basswood, since cyanoacrylate. The RC 56 glue does a For additional information, call (714)278-9000, or that is where you usually pick up the very neat and clean job, since it is water write. For a complete 40 page catalog, send S 2.00. plane when the wing isoff,and balsa will soluble and can be cleaned off. crunch! Build the sides over the plan, Now to mount the motor. You have a covering or tape (I have never needed and check the small detail drawing. couple of choices. I used a motor tube, to, the Brigadier has four years of There is a side stringer that will go on which I made by rolling file card stock service). Wrap thread around the bottom later, which makes the plans a little (from a drafting materials store) around 1/2 inch of the fin post, and drill a 1/16 harder to read, so the detail drawing an Astro 05. The turns were secured with hole vertically up in the center about 1/2 should help. Lay the two sides over one five minuteepoxy. BesuretowrapSaran inch. This hole will be for a wood screw another when they are done to see that Wrap around the motor first, or it will which holds the fin down. they are identical. I then added small become a permanent part of the tube! Now for the stabilizer. Cut the ribs 1/64 plywood gussets at all the glue The tube was 4 inches long. Bevel one from 3/32 sheet, and check that when joints for extra strength. These are easily end of the tube, mark one side 3/16 the spar notches line up that the trailing cut from 1/64 inch plywood withscissors. shorter than the other, run masking tape edges are all the same length. Notch the I built my Brigadier before the days of around to serve as a guide, and cut with trailing edge stock for the ribs. Cut out thick cyanoacrylate, so it may not be scissors or an Xacto saw. This bevel is the tip pieces, and assemble the stabi necessary now. necessary for the motor down thrust and lizer. The 1/4 inch spar will have to be Cut the firewall, F-1, from 1/8 ply side thrust. Now use the other end of the cracked a little in the center so it can wood. I prefer Sig Lite Ply, it is quite light tube as a guide and draw the cut out on slope from the root rib to the tip ribs on and strong. Now bend the landing gear, the nose for it. Cut out the hole with a both sides. Sand the leading edge lightly and build up the landing gearbox on the #11 Exacto blade, and push in the tube with an emery board. Put in the 1/8 front of F-1. Before you put the front of for a trial fit. Put the motor in the tube square braces from the root rib to the the landing gear box on, check that the with a propeller, and rotate the tube second rib, these help keep the ribs landing gear slips into it easily. Now until the motor shows about 3° down from bending from the pull of the assemble the fuselage with 1/4 square thrust and 2° right thrust. This is an covering. Cut the elevator strip, and cross pieces from the nose to the rear of eyeball measurement, an exact value is bevel its leading edge. Cover the bottom the cabin. Check that the sides are not necessary. Mark the tube and the and top of the stabilizer and elevator square to each other, a triangle is best nose with about four marks that match with one piece each, leaving about a for this. Once this is done, lay in the up as a guide for gluing. Run a bead of 1/16 inch gap between the stabilizer and cabin floor, using 3/32 balsa crosswise in five minute epoxy just inside the beveled the elevator. The covering forms the the fuselage, on the top of the lower end and on the beveled end edge, and 74 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER adjustable shock dampenef The RC12Í our unique Flex 4 chassis, a 1 dampened front and near roll rates'and a trailing link controlled beam axle. That gives the RC12i a suspen sion without springs, to isolate the radio and batteries While the tires ol the amazing RC12I (ollow the contours ot the track, from excessive vibration for maximum traction on every the central chassis, radio equipment and batteries remain stable tor track surface. phenomenal cornering power. The RC12i WonderCar. Accepts all popular radio systems. Nobody knows more obout building winners New SK du Now there's a brand new winner from Associ ated, the RC12L We call the RC12i the WonderCar, be cause it has handling and road hugging characteristics Flex 4 fiberglass chossts plate second to none. And the RC12i isn't all that's new from the Team. Special "SK" dual compound front tires, gr< VbriLock diff axles, Reedy Indoor rewinds, plus McRae Can-Am, Brabham FI and Lola T600 bodies are just a few of our latest speed secrets. Keep up with all the action with your free sub scription to Racing with the Team. Call or write today The I MSA Champion Lola T600 GTR our newest 1:12 scale body shell. New McRae and Conquest Con-Am bodies also available. Associated Electrics 1928 East Edinger/Santa Ano, CA 92705/(714) 547-4986 1981 ROAR Nationals! Boston - Mike Lavacot/Team Associated wins Indoor Modified. Reedy motors win All modified classes for 4th year in a row. will go through the hole in the front of them down as needed. Slip the fin into the cowl. Drill holes for screws for the place, and bolt it in with a 5/8 inch screw motor mount, and fasten on the mount from the bottom of the fuselage into the with 3° down and 2° right, using shims vertical fin post. Check that F-5 holds the (spruce works well). A 3/16 shim in the front of the fin firmly in place, if it does upper right (as you face the plane) hole, not, build it up or cut it down as needed. and a 1/8 shim in the lower right hole Connect the pusrods, check for neutral should be close. Now check the cowl and that right is right, and up is up (as fits, glue in a couple of spruce blocks for you look from the tail to the nose of the cowl mounting screws to go into, and plane). The all up weight of the plane hold the cowl on with screws, or with should be between 38 to 44 ounces, tape if you prefer. mine weighs 41 ounces. Which motor to use? I prefer the To the flying field! I recommend the regular Astro 05 motor or the Astro 05 XL Astro Flight Rapid Charger or the Leisure motor, both with six sub-C cell battery Model 105 (for six cells), and at least a 6 packs. The Astro 075, the Leisure 05 Ah. field battery if you do not charge motor, and the regular Astro 05 with from your car. I recommend a hand eight cells are all quite satisfactory as launch, though the Brigadier does UMaBOdDH ODwell. The best prop for the Astrl 05 XL, excellent ROG off pavement. A little up the Leisure 05, and the regular 05 with trim may be needed. The climb is slow Everything an engine should be. eight cells is the Cox 7x3-1/2 gray prop. and gentle, as is the flight in general. Use Smooth, powerful, easy starting, This prop is hard to get.sotheTopFlignt moderate control, as the Brigadier light and reliable. Backed by 7x4 nylon or wood prop, or the Rev Up responds quickly and strongly to com Homelites I year limited warranty. 7x4 prop will do quite satisfactorily. My mands, though it goes back to normal Engines come complete with top favorite combination is the regular flight just as easily when you leave it mount, choke. Tatone muffler and Astro 05 motor with six sub-C cells, it alone. Compare the flight with the precision 6 bolt hub. turns a 9x4 Cox prop, and it is perfect in motor on and the motor off. Give up, Nothing comes close. the air. In general, the sub-C cell systems then down, for each motor command, give the longest run time, you can easily to clear the switch (the up allows the get six minutes of flight, and usually switch to clear). If the climb is nose high, you’ll do better than that. The battery but the glide is normal, the plane needs pack fits in the front of the cabin, long more down thrust. Shim the motor side vertical. mount, of if a tube was used, pull out the Which radio? Any two or three- tube using needle nose pliers and an channel radio will do, I perfer to keep it Xacto knife, and insert a new one at the SPECIFICATIONS: light for the best climb, so I use a new angle. If the climb is normal, but the 2.5 cu. In. Cannon receiver, two Bantam Midget glide is either nose high or nose down, Engine weight 4 lb. 6 oz. servos, and an Astro Flight 250 mah shim the stabilizer under the trailing Solid state ignition receiver pack. I use a push-push switch edge. Shim up if the glide is nose down, Roller bearing at flywheel Ball bearing at rear available from Astro Flight, activated by shave off some of the material at the Hemi-head chamber full down elevator, for on and off. The back if the glide is nose up. The Brigadier Schneurle ported servos are mounted by servo tape to the is actually quite tolerant of a range of 2 pc. con rod—bearings cabin sides, as is the switch. The push- trim, so the chances are that you can do Chrome plated cylinder rods are 1/4 square balsa, with 1/16 most of the trim by adjusting the trans Magnesium case Balanced crank music wire ends. The pushrod exits in mitter trim or the horn clevises. Pyramid reed intake the tail are cut out in the covering, then Once the Brigadier is adjusted, normal Built-in choke tape around the cutouts to keep the flight times are four minutes or better _ m Height 7.25" covering from tearing. The control with the regular eight cell Astro 05, and $279.00 retail Width: Shalt center to horns are the Carl Goldberg mini horns. six minutes or better with the six cell widest point: 3.0" The elevator horn is on the right side (as systems. Check the battery after every Total Width: 5.25" you face the aircraft) below the elevator, two flights. If is is hot, let it cool down Mounting plate to prop: 6.0" the rudder horn is on the left side as you before proceding. The usual flight See it at your local hobby shop. face the nose of the aircraft. A threaded altitudes are from 400 to 600 feet. If there He'll order it if not in stock. clevis at the rudder and elevator end are any thermals, though, the bets are CONTEMPO HOBBY PRODUCTS simplifies neutral adjustment tremen off! Then you fly as long as you find 11611 CANTARA ST. · NORTH HOLLYWOOD, dously, I recommend it (I didn’t!). more thermals, and as high as your C A 9 1 6 0 5 Now for final assembly. Fit the landing courage allows! Enjoy, and see how A division ol Contempo Enterprises gear in, if it is loose, wrap some masking much the Brigadier knows about flying, tape around the wire until it is a snug fit it knows more than most pilots! At this on the tube where it comes out of the in the landing gear box. The landing point, I would like to make a special nose. Slip the tube in, and let the gear is removable, for a special reason. acknowledgement, my thanks to Bill fuselage stand vertically (nose straight The landing gear is a little underweight Effinger, the designer of the Brigadier up) so the epoxy will spread out on the for the plane, on purpose. It will bend in and the man who runs W.E. Technical firewall, and let it set. Trim the excess a hard landing, and take up all the abuse Services, for his permission to use the tube sticking out the nose with an Xacto that otherwise would be transmitted to design in this article, and for a very saw. That’s it, all done! the frame. Since it is removable, you can special airplane. The other choice is to use the excel pull it out, bend it back into shape, and Fly high! · lent radial mount sold by Astro Flight. If pop it back in. This feature has been a you use an .09 or .10 glow engine, install real life saver, the front end has never Electric...... Continued from page 29 an .09/.10 radial mount.) For this, again, been mashed in a hard landing, though use the front of the radial mount tube as the landing gear has been many times, in a guide, draw the cut out on the nose for the four year life of my Brigadier. out and start building, as if I didn’t have it, and cut the hole with a #11 blade. Now Slip the stabilizer into place in the enough to do! The 1929 Monocoupe is a cut the entire cowl free of F-1. Mount back, and fasten the trailing edge down 1/5 scale model built from RCM plan the motor in the radial mount, and place with a 1/2 inch screw. Check that the #516, and redesigned for electric as the it on F-1, then push the cowl back on. leading edge is held down firmly by the work progressed. The plane is covered Mark where the mount sits so the motor F-10 pieces, if not, build them up or cut with orange Monokote with regular 76 MODEL BUILDER 95’ PATROL BOAT By F r a n c is S .S m it h L.O.A.48" BEAM 10.5" ALL WOOD KIT SAWN FROM AIRCRAFT QUALITY BIRCH PLYWOOD. SPRUCE AND FIRST GRADE BALSA 1/4" PLYWOOD ONE-PIECE KEEL 3/32 " PLY FRAMES AND SUB-DECKS 3/32" PLY CABIN DECK AND ROOF 1/16" PLY MAIN DECK AND CABIN SIDES 1/16" PLY HULL SKINS 20 FRAMES SPACED 2-I/4" APART PRE-CUT AND DRILLED BRASS - PORTHOLES. HANDRAILS. STANCHIONS. RUDDERS. STUFFING BOXES. AND RUDDER TUBES FIXTURE FOR LOCATING STUFFING BOXES 3/16' SQ. SPRUCE STRINGERS ENGINEERED FOR SMOOTH ASSEMBLY W ITH INTERLOCKING FITS OF HULL AND CABIN U. S. COAST GUARD WPB95304 CAPE GULL TWIN ELECTRIC DRIVE RUNNING HARDWARE A v a i l a b l e O n l y f r o m NOT INCLUDED. WRITE FOR INFORMATION FRANCIS SMITH’S SHIP YARD PRICE $ 250.00 P.O. BOX 118 INCLUDES UPS SHIPPING IN U.S.A. NORWOOD. PA. 19074 CHECK OR MONEY ORDER ONLY Monokote trim and a silver nose. The rudder, and stab are in white, the J-3 Cub...... Continued from page 31 span is 66 inches, chord 11-3/16,area 716 fuselage in yellow (Cub yellow). Regular square inch, weight 67 ounces, with an Monokote was used for the trim. Bill Astro 15 and 3:1 speed reducerswinging sure does do a nice job on the trim! It For engine starting chores, I really like a Zinger 13-8 prop. It even has spring flew with the Astro 15 and 3:1 speed the ‘Buzz Box’ by Wings Engineering. shock absorbers! Bill says it is a very reducer, at 61 ounces (light!), with This glow plug heating device is quite practical ship for grass fields, the 4-3/8 pleasing performance. It is stable in different than most in that it emits a very Williams wheels going through the grass flight with good quickness on control audible sound (voltage is adjustable for very nicely. It is stable in rough air, and response. Bill figures with the extra drag various plugs) that indicates whether the beautiful to watch in flight. Bill is of a biplane, flights may be shorter (he plug is shorted, burned out, flooded, or considering making plans, possibly didn’t say how much, I would guess in dry. Voltage to the plug is varied through an article, or to SEAM members, the 4 to 5 minute range. M.P.). Bill said depending on the requirement of the it is just too good to let lie around. nothing at all about plans. . . I hope he plug at that moment. If the plug is The other plane is really fantastic! It is does make some, that is an absolutely flooded, voltage is increased to burn off a Franklin Sport Biplane, the original was gorgeous biplane! (Heis makingfinished the flood, and by listening to the 'Buzz built in 1930-31, and detailed drawings plans, and MB is going to publish them! Box,' you can tell when the wet plug is of it appeared in MAN in the April 1963 wen). drying out and the engine is about ready issue. It was a small plane, with an upper Speaking of flight times, I have “ dis to start. It’s a welcome addition to my span of 26 feet. Bill did it in 1/6th scale, covered” that the Astro 15 on an Astro 25 flight box, and beats the heck out of my with an upper span of 52 inches and a pack flies a lot longer and has more other methods of starting. Since I still lower span of 48. The fuselage is 39 power. I’m using this combination in my hand flip, it tells me the exact condition inches long, the wing area is 740 square Aqua Sport float plane, and the dif of my plug. inches. Bill decided to keep the struc ference is really great. I load the motor I used a Futaba 6J series with dual rate ture as light as possible and let the w ith an 8x6 prop, and get quicker and servo reversing features, which rigging help provide the strength (I have takeoffs, great performance in the air, removes the worry about compromising done that, too, on my 1/6th scale Tabloid and eight-minute flights. There is a servo/pushrod installation. It’s now a for indoor flying . . . it's the only way to weight increase; my float plane with the simple matter of the best, most sanitary go! M.P.) A prototype with a Clark Y regular pack weighs 3-3/4 pounds, with installation, then flip a switch to insure airfoil was not completely successful, so the 25 pack it weighs 4-1/2 pounds, but that the control surface is moving the for more lift, a combination of an Eiffel the increased power more than makes right way (this is the important parti). 431 and the nose of an Eppler section up for the weight. I’m flying on 460 The receiver and battery pack, each gave an undercambered wing of 9% square inches of wing, with floats under baggied and wrapped in foam, were thickness, mean curve 5%, quite similar neath, so Bill’s planes could take the 25 installed under the tank, and three to the full scale. The plane was flight pack quite easily, I'm sure. The ultimate, servos mounted abreast in the front seat tested without the- engine cowl or of course, is the cobalt 15 .. . dream on! area allowed the Cub to fly off the bench engine details, and was covered in Till next time, try the electric with no balance weight needed. Fabrikote with no paint. The wings, challenge! · On the initial flight, I used a 10-4 prop SEPTEMBER 1982 WHEN CONTACTING ADVFRTI5ERS. TELL ’EM MODEL BUILDER SENT YOU! 77 into its correct position. With the spoiler so installed, the spoiler can be precisely sanded to match the contour of the High Performance OVER wing. The stops will also help align the Accessories for hinge line of the spoiler when the Tamiya Off-Road spoiler is in a closed position. 4) A one-inch long piece of 7/8-inch Vehicles Available outside diameter brass tube bent slightly for Immediate Delivery, and more in the middle can make an ideal spoiler on the Way!!!!!!!! control horn. The spoiler cables, when threaded through the brass tube, can be held in place by inserting a toothpick. JUST A FEW OF THE 85 HIGH QUALITY ACCESSORIES AVAILABLE: This setup makes the spoilers very easy to adjust and no tools are required. Always position the control horns in the REPLACEMENT BRASS GEARS DUAL SHOCK MOUNTS ALUMINUM WHEELS center of the blade. HEAVY DUTY FRONT AXLES METAL REAR GUARDS SKID PLATES 5) When covering the wing, fold the HEAVY DUTY STEERING KITS RUBBER SHOCK BOOTS SIDE NERF BARS covering material down into the spoiler COIL OVER SHOCK KITS ALUMINUM CHASSIS BALL BEARINGS bays and iron it down well! Later, when the hinge is applied, this will prevent the SPECIAL TORSION BARS FIBERGLASS CHASSIS S H O C K O IL covering from pulling up due to the MODIFIED OFF-ROAD MOTORS Available From: forces on the hinge. WIDE FRONT END KITS 6) Trim tape, 1 /4-inch wide, makes an HOBBY MARKETING ideal hinge for spoilers. It is easily H. 0. FRONT END TUBES 657 West 19th Street Costa Mesa, CA 92627 replaced if problems develop; holds COMPLETE HARDWARE SETS (714) 646-9273 very well, and is attractive. By keeping Dealers inquiries welcome the roll of trim tape in your flight box, field repair of a loose or binding hinge can be done in less than a minute. ★ ★ ★ Last month I mentioned the con tinuing debate over the origin of natural flight. In any case, some birds are a natural prototype for soaring machines. “Matched Performance System" Remember, there are some 25,000 dif for TOP PERFORMANCE ferent species of birds, varying in size *48 ENGINES from the ostrich that weighs about 125 •6 A.rofahe · - Ma* -e pounds, to the smallest hummingbird <&B ř-iEwS «&Β GtOA pLwGS that weighs in at about 1/10 ounce. ' B e^cs ·* voices According to K. Steel, of New Zealand, PACESETTER “Matched Finish System” the skeleton of the Frigate Bird spans for BEST APPEARANCE % SCALE SPRINTERS KITS START UNDER $400.00 some seven feet and weighs only four K&e = B£p 3-AS$ a&B V c'2-3a. : c* s c - .£ = ounces; the feathers make a flexible a & 6 5^P£ c «Ε$Λ «SB S . PE = p . «· *** NSEC Factory Direct.For additional information «S3 SvpEB PQ*V PG VEG «kSB S - PEG p0 * v ° a s ’ send $1.00 for brochure to: ■■■■ airfoil suitable for both life and pro «SB V X.NG C . pS pulsion. P A C £ S £ r r r # Birds operate over a wide speed KAB MANUFACTURING fHOlH ÍTS 12152 W oodruff Avenue Garner Valley Box 257 range. The Peregrine Falcon is said to Downey. California 90241 Mountain Center.CA. 92361 (714)659-2318 achieve 180 miles per hour in a dive. Birds' wings conform to their life style. and felt that a bit more pitch was inclined toward this type of model . . . There are four common types: needed, and have used a 10-6 on all Get one and do it. · *23 Elliptical Wings: Birds that live in the successive flights. And what are they forest and on the ground, such as the like? Well, the Cub flew off the board Soaring...... Continued from page 34 Turkeys, Doves, Woodpeckers, and with only minor trim adjustments (like perching birds, have short wide wings slowing down the ailerons, for example). with many slots (variable spaces be It loops easily, rolls reasonably well (it’s a the hard part; pull all four lines at once tween the primary feathers). Such a Cut, ain’t it?), spins (with talent), and and snug up. Trim off all excess line close design confers high maneuverability even performs inverted flight. Mind to the knot. Practice on the draw strings and rapid takeoff. you, all this has to be flown, you can’t of the living room drapes and soon you High Speed Wings: Long, relatively just wiggle the sticks one way and wait. It will be able to knot with the best of slim, backward-directed wings without is scale and slow-flying (make that them.” slots are found in birds that feed in the realistic!) and a pretty sight in the air, The same Newsletter offers tips on air, such as the Swift, or those that make resplendent in its Yellow FabriKote, spoilers. long migrations like the Terns. This wing Cub decals and black numbers. The tail is better suited to fast level flight than to pops up easily on take-off and it tracks Ί) Do not use trailing edge stock to fast takeoffs and manuevering in close quite straight until you decide it’s time make spoiler blades. It warps too easily. quarters. for lift-off. Touch-and-go’s are routine, Use 3/16-inch hard to very hard balsa High Aspect Wings: Soaring birds like and the Cub maintains directional sta and bevel all four edges so as to give the the Albatross and Frigate have very long, bility on this manuever (a light cross- blade a trapezoidal cross section that is slim, outward-directed wings suitable wind on test fight day yielded several wider at the top. for high speed flight in strong, steady neat one-wheel touch-and-go’s) very 2) Cover spoiler blades on both sides winds. well. (bottom first) to prevent bowing or Slotted High Lift Wings: Birds that soar Overall, the Top-Flite J-3 Cub is a great warping of the blade. over the land, such as the Condors, building kit/plane, a realistic and com 3) Prior to any covering, glue balsa Vulture, Hawks, and Owl have long, fortable flyer that presents no particular stops to the ribs at either end of the wide wings with many slots. This design problems, and allows you to enjoy. I spoiler bay. These stops should be combines maneuverability with efficient heartily recommend it to those who are installed so as to allow the blade to drop gliding, enabling the birds to circle in 78 MODEL BUILDER For information send $2.00 to TECHNOPOWER II Inc. 16650 So. 104th Ave.. Orland Park. IL 60462 the small updrafts of warm air that occur About this time, Walter Righter had the cylinder. Also, the propeller drive over land. designed a model engine that ran quite washer had ten holes (a multiple of five). Take your pick. well. Righter was looking for a buyer and Any Hassad engine collector will recall ★ ★ ★ heard about the Denny requirement. Ira's penchant for the use of five or ten According to the old saying, ‘‘All’s Righter quickly produced ten engines divisions in his engines. (At one time, well that ends." I suddenly find myself and the rest is history; the Dennymite every motor manufacturer worked for with increased responsibility. I’ve now engine was born. The rugged cast iron C.C. Moseley; Atwood, Ohlsson, An accepted an assignment in addition to parts easily passed the wear test. derson, Hassad. What a design team!!) being president of Decision Science, We are indebted to Bob Veir, of A typical Baby Cyclone practice incor Inc. In the coming months, it will be California Hobby Distributors who porated in the motor was the left hand hard to find time for soaring, no less kindly allowed this writer to remove the thread on the retainer screw holding the reparing this column, and so the time Sky Charger from the Dennyplane that connecting rod on the crankshaft. as come for me to turn over the has been on display at the various trade The engine also was made with a cast responsibility of this column to another shows all these years. The engine we iron sleeve with a specially machined equally enthusiastic sailplaner. have borrowed has #9 stamped on the piston consisting of an aluminum top I want to take this opportunity to case and #12 on the backplate. This was pressed into a steel sleeve. The wrist pin thank my family for putting up with my probably the result of switching parts pads were then drilled and tapped into eccentricities and also thank my friends during the long runs. The only other Sky the piston top extending into the piston who have contributed to making this Charger known to this writer is #8 in the sleeve. The wrist pin actually held the column a success. In particular, I want to Larry Boyer collection, i.e.,at last reports. top of the piston in place!! thank Joyce Belle for her fine transcrip Actually, the Sky Charger was a very Another neat gimmick was the drive tion of my notes. ruggedly built engine with full length washer being screwed unto the 3/8” I’d like to stay in touch. Perhaps we reinforcements running from the fins to dia. portion of the crankshaft and then can fly together at Torrey Pines some the mounting lugs. Inspection of the pinned in place. That one would never wonderful windy day. motor reveals the only weak point of the come loose! Stay well and happy · motor appears to be in the spring leaf In retrospect, the engine was quite ignition system. This arrangement, advanced in concept for its time. Truly a Plug Sparks . . Continued from page 38 based, on a Baby Cyclone design, would shame the ignition system wasn’t as never have lasted the 50 hour require rugged as the rest of the engine! ment. THIRTY YEARS AGO, I WAS... had his boys (Atwood, Anderson, Has- One interesting feature of this engine Robert Wynne has been bending my sad, et al) cook up a design. In short was the needle valve body and intake ears again with early reminices of the order, twelve engines were delivered to tube being cast in one piece. Of course, thirties at Moffet N.A.S., at Sunnyvale. Denny for the 50 hour test. production methods would have eli This writer recalls all the action too When it was found by the tests the Sky minated this by drilling the intake tube vividly, but let Bob tell it: Charger (as produced by the makers of for a removable needle valve so neces “ Moffet Field was built in approxi the Baby Cyclone) could not pass the 50 sary for inverting the motor. mately 1933. After the loss of the airships hour requirement without breakdown, The Sky Charger, according to Joe USS Akron and USS Macon, the Navy this left Denny Industries in a spot as Wagner’s Model Engine Index, has a had no use for the field. With no lighter they had embarked on a rather exten displacement of.573 cu. in. As measured than-air traffic and very little heavier- sive advertising campaign. All due credit at Replica Engines (Carl Carlson), a than-air flying, the civilian airplanes to Reginald Denny should begiven as he stroke of .8125 and a bore of.75 gives a were allowed to use the runway. Normal steadfastly held to his original specifi .358 cu. in. displacement. This is very practice was to call the operations office cation. Actually, the Sky Charger ran similar to the Baby Cyclone in size (.37). first. Very often there would be no quite well and could have been mar In any respect, the engine never made a answer because of such low activity. keted except for the promised 50 hour full production line, as the Baby Cyclone Many touch and goes were made on and duration figure that Denny was hoping was still selling very good. off that field, as it turned out to be a would attract sales on the basis of A noticeable Ira Hassad feature on the good practice area. proven reliability and durability. engine is the five-bolt arrangement on "As a result of low use, the Navy SEPTEMBER 1982 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 79 taken then. SAILPLANE ENTHUSIASTS — Carl has submitted photos of his 1931 ENJOY TROUBLE-FREE FLYING WITH THE NEW P O W 'R W IN C H Wall powered biplane called “ Big ANDTHE RETRIEVER,DESIG NED FOR EASE OF HANDLING AND Crate” . This appeared in the May 1932 THOROUGHLY TESTED BY MODELERS IN THE FIELD. THE P O W 'R issue of Aero Digest. Photo No. 8 shows W IN C H WILL LAUNCH ANY SIZE SAILPLANE TO A MAXIMUM HEIGHT Carl in 1931 with Big Crate #1, a Wall WITH FAST, EASY OP E R ATION - AND FOR THE FIRST TIME A LAUNCH-A- powered model. Big Crates #2 and #3 MINUTE IS POSSIBLE USING THE R E T R IE V E R - NO WAITING-NO (which we will see later) were engined WALKING-NO NONSENSE ! Wr i le or call (orm oreinlorm ation with the Gil motors. "Big Crate #3 won the Senior Open contest at the Nationals at Akron in 1934. This was the last model contest I ever entered, as I went back to college.” "Late in 1932 and in 1933, I worked with Gilbert Nelson (not Knight, as erroneously reported) for the Power Motor Boat and Engine Co. on the early development of the Aero Knight engine." Carl has kindly included a drawing made by him of the Aero Knight, show ing the cylinder head cast with the cylinder and not bolted as shown in the Pond drawing. (This was actually taken DAVEY from a Knight engine in the Karl Carlson $ 3000 * t SYSTEMS $ 2 50 0 ' collection. Gets more confusing all the • less battery i»s<: CORPORATION plus shipping time!) plus shipping ONE WOOD LANE.MALVERN.PA.I93S5 <215)644*0692 "Incidentally,” Carl also states, "The carburetor did not have a float. Mixture and fuel flow was by a poppet type valve." MARK V RUBBER STRIP At the same time, Carl started the HAND DRILL/WINDER FAI RUBBER. Made in U.S.A. Carlson Model Airplane Co. to produce SIZES 1/4". 3/16", 1/8". 3/32". kits as shown in Photos No. 9 and 10. 1/16". by 1mm (.042") thick. These were intended for the Aero BOXED 16 ounces of rubber per box. Knight engine. However, the engine did not run long enough to be able to fly the S28.00 PRICE: $12 00 per box, postpaid in U.SA. models, hence, none of the kits were Plus Freight sold. Carl did run the company for two NEW PIRELLI SIZES: 6mm. 3mm only, 1mm thick years, producing rubber powered and solid scale model kits. * HEAVY DIE-CAST NYLON CASE PRICE: $18.00 per hank ■»METAL GEARS The foregoing is of considerable (approx. 1/2 Kg.) »ADJUSTABLE GEAR TOLERANCE historical interest, as Carlson appears to ♦ BALL THRUST BEARING ON SPINDLE TIMERS: KSB. Fuel & DT: $11.50 ea. be the first manufacturer to produce gas Catalog - S1.00 plus 10% UPS. model kits. Truly a shame he was so far Sole U.S. Distributor and World Wide ahead of his time and the Brown Jr. JIM CROCKET REPLICAS ales. Send 2Sd for 1981 CATALOG. P.O. BOX 12600 engine. F.A.I. Model Supply SAM SALLIES FRESNO. CA 93778 O t PO ΘΟ* y r > r TORRANCE CA 9OS10 Latest report from C.D. Bob Shafer of SAM 8, indicates the club is still having allowed modelers the use of the field on get a chuckle. Seems like one Sunday problems with the Harts Lake field on Sunday. Usually the flyers would gather morning, a man from San Francisco any particular day. Biggest trouble is that at the north end of the runway and turned up with a beautifully built model you can get cancelled at the very last generally quit when the mid-afternoon with absolutely no dihedral. A long moment. wind came up. discussion among the bystanders and Bob says Don Zipoy was a great help in “ Models simply drifted down the kibitzers ensued. The builder claimed negotiating with the US Army. Bob says runway and were easy to retreive. the model would be stable and fly satis all he had to do was to call Range Occasionally one would run into the factorily. The remaining modelers pro Control Sunday morning. After getting hangar with more damage to the model tested it wouldn’t fly. clearance from Sgt. Hutchinson, it than the hangar. Quite a few contests “ He finally started up the engine turned out he was an R/C modeler. Nice were held there, some big, and some and launched it. Wonder of wonders, it to have an airplane devotee on your informal. flew, if only after a fashion. The air at that side! "Late in 1938, with war in Europe a time of the morning was quiet, but Wouldn’t you know it! After all the definite possibility, the field was closed eventually the model did get into an negotiations, somebody forgot to put in to model activity. (Columnist note: This attitude from which the only recovery a reservation for good weather. The was also due to the incoming Ames was SPLAT!! At that point, trie builder weather was cold and windy, cutting Research Laboratory, with people, wind turned to the assemblage and said, ‘See, down the attendance. Rats! tunnels, and top secret work.) About I told you it would fly’.” Don Nordlund won the 30 Second this time, I discovered girls, and model WILL THE REAL Antique event, the rubber was copped ing came to a definite halt. The Navy CARL CARLSON STAND UP? by Bob Beniamin, and Ray Neuman won turned the field over to the Air Force Aha! Finally heard from the real Carl Ignition Caoin. The new event, which is during the war to be used as a training V. Carlson, who is residing at 811 North gaining popularity, R/C O /T Assist base. This later was returned to the Navy Columbus, Glendale, CA 91203. Carl Event, was won by Hugh Flournoy. as a part of their peacetime training mentions the photo from Joe Ott, pub One great thing about the “ bummer” program. lished as Carl Carlson, is not of Carl. Carl of a contest was that SAM 8 picked up "I can recall one interesting happen and Joe did visit the 1935 Nationals at St. three new members. How about that! ing with the model group that should Louis, and Carl believes the photo was GORDON CODDING AGAIN 8 0 MODEL BUILDER Λ r i r - í v m * yW W ^ r W r W VW ENGINES IRVINE SPORT SERIES R/C ENGINES Competition Engines at Competitive Prices ------FEATURES------• MODERN SCHNUERLE PORTED DESIGN t DYKES RINGED PISTON IN HARDENED CAST STEEL LINER • HEAVY DUTY FORGED CONNECTING ROD W/ BRONZE BEARINGS • DUAL BALL BEARING SUPPORTED CRANKSHAFT • PRECISION CONTROL TWIN NEEDLE MULTI-SPEED CARBURETOR MADE FROM NEW POLYESTER BASED MATERIAL Sport 40 R/C • AVAILABLE IN .20, .25, .30, .40, AND .61 SIZES w/silencer $89.95 Available at your favorite dealer FOR MORE INFORMATION WRITE OR CALL TODAY! MIDWEST MODEL FAST SERVICE... to all parts of SUPPLY CO. BOX 518R. ROMEOVILLE. ILL. 60441 312-759-1955 the UNITED STATES “ Full line model distributor serving dealers over 40 years” Every so often, we receive photos of plane. Received a nice writeup and photos the darndest looking models you have CASE I from Jim Persson, of SAM 32, of the Sixth ever seen. This is due to the precision Assume you have an aircraft of 50-inch Annual AMPS Bowl, which was held type contests that were constantly being wingspan with a wing area of 350 sq. in. rather late in the season, April 25. No held in Southern California between and you wish to scale the model to a 72 question about it, the unprecedented 1935 and 1939. inch wingspan. rainfall in California really put the Gordon Codding has sent us Photo Actually it is simple when you know “ queetus” on all model flying for four No. 11 showing an unusual model de how. First, find the scale factor which is months. signed by Clyde Austin called the “ Ding 72 divided by 509, giving a 1.44 magni Flying was held at the San Ramon area bat". The man on the right tuning the fication factor. Since SAM rules require near Dougherty Road. Photo No. 12 Baby Cyclone is Webster Hill. you to know your wing area, what is the shows the gradual encroachment of This five foot model, powered by a wing area of your new biggie? housing, as seen in the background. This fixed spark Baby Cyclone, somewhat Simply multiply your original wing photo shows Jim Persson winding John resembles a "W eick A-1 Safety A ir area by the square of you r scale factor. I n Gomez’ Comet Curtiss Robin. This plane” . Some Waldo Waterman influ other words, the new wing area equals model was a startling performer, being ence can be seen in the swept back 350 X 1.44 X 1.44 equals 725.76 sq. in. A one of the best flyers of all the events wings. An unusual tricycle landing gear quick recapitulation is in order: held; .020 Replica, Scale, and Phantom was employed, with the single wheel (1) Scale factor = dimension wanted Flash Events. being under the propeller. divided by dimension you have. Because of the westerly breezes that Codding further reports that Clyde (2) New wing area = original area spring up like clockwork around 11 and Web were partners at that time and times the scale factor squared. a.m., flights were limited to one and a published plans of the model. Gordon CASE II half minutes. However, trust Jim Persson recalls one of the designs still flying at Here is a c ase where you have a model to promptly lose his Comet Phantom Rosecrans and Western Field in Gardena with 72 inch wingspan and a wing area of Flash after two minutes. After an hour of as late as 1939. A set of prints have been 725 square inches. You desire to scale fruitless searching, he gave up. Finding uncovered in the Clyde Austin estate,so this model down to 350 sq. in. of wing those small rubber models is tough! it shouldn’t be long before this design is area. To find the scale factor, divide the Undaunted, our hero put up his backup available to the fellows who like the desired wing area by the original wing airplane with the same results. He got "out-of-the-rut" type models. area and then find the square root of the lucky this time, and recovered the SCALING result. model. Who said those small models With so many good designs being S.F. = 350/726 = .694 didn’t need dethermalizers? As a side adapted to the various classes, many Using the scale factor, the wingspan of note, Persson claims the secret of his modelers are puzzled over an easy way the scaled model is 72 x .694, equalling 50 success is the clear covering he uses. to determine just how they get the inches. You will note this is the reverse “ Handi-Wrap” in this case! desired size and/or wing area. Thanks to procedure of Case I. Now, I don’t want Photo No. 13 shows a portion of the Bob Angel, newsletter editor of SAM 26, to hear anyone say they can’t scale a SAM 32 gang (some had already gone “ Central Coast Chapter", here are some model easily. home before the end of the meet). methods for scaling your favorite air AMPS BOWL VI Rubber powered models are making a SEPTEMBER 1982 WHEN CONTACTING ADVERTISERS, TELL ’ EM MODEL BUILDER SENT YOU! 81 Field. This time, Pete had to settle for a NEW! KIORITZ MARINE NEW! second place. AUSTRALIA Had a heckuva good time in Australia Now have the power & de but haven’t finished the writeup on the pendability the BIG boats • 1.3 cu. in. need! travels as yet. This little literary effort • 1.5 hp Ideal (or hulls that now re should please all modelers as it will © 8000 rpm quire .65 to .90 engines. cover the Nationals, modelers, manu facturers, etc. In fact, there is a little for Enjoy the pleasure of start • 47a lbs. everyone . . . something like Model ing your boat in the water Builder! Comes complete with re and running it for hours on While on tour in Australia with the coil starter, motor mount & cheap gasoline. modeling group for PARCS, a Victorian water cooled head. $169.95 Direct Sales Only. R/C Club, the writer had the pleasure of meeting Norman Garrett, a long time Rear 3405 Cleve Ave., S.W. buddy of Monty Tyrrell, my host on this Canton, OH 44707 trip. ,ROUSH MFG. Phone 216/484-6810 or 216/484-4374 Photo No. 15 shows Garrett’s neat work on a Taibi Powerhouse. Of course, tremendous comback now that halfway Gene claims the folding prop was not with their very own field (and a huge decent rubber is again available. The so much for the streamlining as it was for one at that!), the PARCS fly primarily Marin A/C Contest featuring Joe Ott lack of landing gear. Most modelers will radio control, and so the reason for the models should be a real lulu! Joe Ott remember the Goldberg design fea Powerhouse being equipped with a himself put up the trophies forthisgreat tured a retractable landing gear that three channel rig. looking meet. failed to protect the propeller when It was a bad day at Black Rock as Wrapping up the contest, it is well to the model glided into the ground. Ya Monty Tyrrell had no sooner eliminated note that old sparkplug Persson won the learn something every day!! his "Woolaroc” flying scale, than in an Sweepstakes award consisting of the SAM ABROAD ensuing flight with the Powerhouse, the AMPS Bowl Perpetual Award and a Cox Latest reports from England via Dave wings folded. A major repair job, but .020. The best part of the day then Baker (founder) and Alex Imrie (presi Norm, being an old free flighter, will get occurred as John and Beth Gomez dent) is that the SAM movement over it done! invited tha gang over for a terrific there has grown to such proportions THE WRAPUP luncheon featuring hand churned that the SMAE (English counterpart of Normally, this writer tries to leave the peach ice cream. That’s nostalgia! American AMA) is giving SAM moreand reader with a good anecdote, or some Results looked something like this: more space on the Nats program. sage words of advice based on past .020 REPLICA Aeromodeller, the outstanding experiences, or a special announce 1. Cliff Silva modeling magazine in Britain, has come ment, but this time we would like to 2. Art Watkins right out and suggested that SAM carry acknowledge those fellows who have so 3. John Gomez the ball for all large functions that unselfishly contributed to this column in SCALE feature old timers. The magazine has the form of newsletters, photos, write 1. John Gomez given a full column to Alex Imrie and ups, contest notices, and just plain 2. Jim Persson monthly features an old timer design. entertaining letters. 3. Cliff Silva The interest is phenomenal! Sometimes we fail to acknowledge PHANTOM FLASH From this vantage point, this author your contributions; even worse, fail to 1. Jim Persson can see a separate Nationals in the use the material in the column. Please 2. Al Rasmussen making for Old Timers. The pattern, as in accept this apology to those fellows who 3. John Gomez the USA, is again repeating itself. This is have never had their staff recognized. COWL VS. NO COWL simply great, and the aforementioned Might add at this point, if we included Boy! All this columnist has to do is to boys should be highly commended. everything that was submitted, North make a disparaging remark about the We are also indebted to Dave Baker rop would have to start another maga lack of a cowl on an otherwise attractive for Photo No. 14 showing the SAM 35 zine devoted strictly to old timers. (Now model and does he catch it! Latest one to Treasurer, Peter Michel, launching a that ain’t such a bad idea, haw!) take this writer to task was Gene Wallock Houlberg design called the "Isis". As An excellent example of what we are (P&W) about the old photo of Frank Dave says, "What a beauty and worst of referring to is the excellent District II Cummings (July MB) with an uncowled all, it flies as good as it looks” . The photo Collectogether staged by the new Re Comet Sailplane with folding prop. was taken at Watton Royal Air Force gional Director, Darrell "Red" Gar- lough. Held at the Pollarville Chicken Kitchen near Stockton, this turned out DICK HANSON MODELS to be a real fun thing, as the banquet Our Flying Hippo 825 is pretty light on his feet.We room was an adjunct of the restaurant. In addition, after the collectogether was have supplied a number of these to active competition over, a dinner and show was offered at fliers.internationally as well as here in the U.S.A. the adjoining Show Boat DinnerTheatre, The new 750 sq. inch Tipo also gets around. According where old fashioned melodramas were to the feedback we recieve.both types are doing presented. To top it off, the members extremely well at local,regional and national contests. were invited to a Fly-In at Rough and Custom built airframes of these and other winning Ready Island, with the Delta Modelers of designs is still our main business but we are adding Stockton. kits this year of the Tipo's and two new designs— The foregoing is exactly what is meant. The Formula 750 and the "Cheep Trick',' A 625 sq. There simply isn’t enough time and inch rear exhaust 40-46 Bird. space to cover all the fun, but we do try If we can help you too-Call or write- to give everyone a fair shot at publicity. In that same line, the columnist is most DICK HANSON MODELS appreciative of all photos (especially the "Hippo" Tee shirt with each order shipped 5269 LUCKY CLOVER LANE oldies) received, particularly with inter Phone: (801) 261-1402 MURRAY, UTAH 84107 esting comments. Recognizing the main 82 MODEL BUILDER UUH€N PERFORMANCE COUNTS _CP-1 MRVERIO- 4 CHANN€l RADIO for .40 .61 €NGIN€ 1032 square inch wing area 59” span 44”length weight: 4.5-5 lbs. BASIC DCSIGN ADVANTAGC...... • The Canard improves vertical performance while reducing wing loading. • The Spoilers eliminate adverse yaw while improving initial roll rate. • Pusher Propulsion eliminates propeller disturbances over airfoils. Full size plans with tem plates & instructions $25.00 includes shipping in mailing tube. California residents add 6% Sales Tax O. V. €NG IN €€R IN G P.O. Box 427, Palmdale, CA 93550 theme of old timers is nostalgia, we try to was that fetchingly accented phone asking where to get one of the bending run plenty of the old time stuff that voice with whom they discussed their jigs mentioned in the June issue. Mea would otherwise be lost to antiquity. R/C helicopter hobby. culpa, I dropped the ball on that one, I Another vote of thanks is due to those We worked together for many years; should have mentioned a source for engine collectors who have so kindly many of the instructions, ads, and those of you who have to depend on loaned their engines for copying unto product sheets you’ve read on Kavan mail order suppliers. paper. It is bad enough to catch the products were the result of our joint A little research through the file dickens for inaccuracy on dimension effort. Though she is not a modeler, she uncovered a great catalog from Contact and parts in drawings taken directly is extremely knowledgeable about all East, 7 Cypress Dr., Burlington MA from the engine itself, but imagine the phases of our hobby, and is an honor 01803 (617) 272-5051. Said catalog lists a controversy this writer gets involved in graduate of the Marez School for Mode number of single-sided bending tools, when he uses the manufacturer's draw One Pilots, To any non-flying lady for resistor and similar sized compo ings that pass for scale three-views! reader who wants to, but is reluctant to nents ranging in size from 1/8 to 2 watts. So don’t be surprised if you, the take that first step towards R/C flying There is also a double-sided tool, such as engine collector, get a letter from this simply because few gals do it, let me tell mine, one side for 1/4, and the other writer asking if he can borrow your you that this young lady was my fastest side for 1/2 watt components. The engine (generally a rare one!) to mea learning student ever! Her third flight former are priced at from $4.85 to $7.30; sure up and publish for all to see. As an was her first takeoff, and by the end of the latter is more reasonably priced at example, we have the Feeney Four Cycle the second session she was through with only $2.00. The catch (why is there from Red Garlough and the Tlush Super my old faithful high-winger and was always a catch?) is that the company has Ace from Bob Bowen coming up soon. asking for something faster and more a $10 minimum order. Flowever, all is We are real proud to present drawings manueverable. Favorite manuever? not lost; write and ask fora catalog, you of these lesser known engines. Immelmann; naturalich! won’t have any problem finding enough To conclude, this writer is not asking Auf weidersehn, schon Fraulein, your tools in it to total $10; the problem will (as do other columnists) for contribu many friends join me in saying: Halsund probably be stopping at that total. You'll tions, but get this, he expects it!! This is beinbruch, you are gone but not find listed many high quality small hand your column. We can’t print what we forgotten! tools made for electronic assembly, don’t have. Your contribution may be On the subject of lady fliers, I had a which is exactly what the doctor ordered the very thing we are looking for at the letter from another Chris; Christopher for model builders. If all else fails, you time. As Walter Winchell used to say in Adams, a glider guider from Reno, who, can fill up the order with Xacto blades, answer to the query why he was the having read my April column, wrote to which is just one of the items listed. leading columnist and constantly remind me of the R/C achievements of NEW GOODIES scooped the opposition, "A Columnist is one Barbara Henon. Well Chris, I know One of the things I positively dislike is no better than his sources” . Get the of Dr. Henon, having had the pleasure of having to cut a mounting slot for a slide message men!! · meeting her briefly some years ago, and switch. Seldom, if ever, do you get one I do know of some of her successes, cut by hand that looks as good as the Electronics . . . Continued from page 41 though not everything that you men ones punched out with a die. Fortu tioned. It was not my intent to slight her nately, there is now a cure for us hackers . . . or the many other lady flyers, . . . a neat plastic guard that not only I have just had the sad chore of mechanics, pit crew-persons, call girls, covers up our mistakes, but serves a dual delivering a long-time good friend to cooks & bottle-washers, go-fers, contest purpose in protecting the switch from Los Angeles Airport! Chris Blum, ex-VP workers, or whatever, of whom I have accidental operation. of Kavan Model Aircraft in neighboring no personal knowledge. We all appre Such switch guards are not entirely Santa Ana, has departed these California ciate and respect you for your part in new, they have been used and available shores to assume a position with the making our hobby what it is! from certain of our radio manufacturers, Kavan head office in her native Ger LEAD BENDER though generally only for the 4PDT many. Chris was here for many years, That's lead as in "the one ahead,” not Noble switch. Incidentally, said switch and is well-known to many of us in the lead, as in "sled.” Well, "the one ahead" has been dropped by the maker,Teikoku industry and in the hobby. We lucky on this subject was Kent Eicher, who’s Tsushin Kogyo Co., of Japan, which is ones knew her personally; to many she letter was the first of several to arrive. one of the reasons we are beginning to SEPTEMBER 1982 WHEN CONTACTING ADVFRTISFRS, TELL ’EM MODEL BUILDER SENT YOU! 83 One thing that isn’t the fault of the radio, but that you should be aware of. At the end of a race, we have always first switched off the radio, as there are a lot of transmitters in close proximity with racers heading to the pits. With the radio off, we know the thing won’t go crazy on us and can take our time in shutting down the motor, usually just letting it die on its own by setting the car on its nose, which gets the pickup out of the fuel and reduces chances of having a flooded motor when the next heat is up. But with these coreless motor servos there is no drag from the motor’s arma ture and brushes, so the servo will easily be pushed by the over-ride linkage to an open-throttle position. After our first heat race, Joshua picked up the car, turned the radio off . . . and we zinged the motor real hard before I could get to FOAMS SAFETY EQUIPMENT the switch to turn it back on. You've been warned. To put a wrap on it, the Airtronics XL wheel system, using the number 94557 AIRCRAFT SPRUCE & SPECIALTY CO. servos, is a very good radio that I have P.O. BOX 424 · FULLERTON. CALIFORNIA 92632 · (714) 870-7551 raced with and like. If you prefer the FIRST IN SPRUCE—Second fo None In Building Supplies box-type transmitters, order the whole package. If hooked on the Kraft Tx, it see other types being used. you learn the fundamentals of current, works the Rx just fine, at least on the 27 My news concerns just those other voltage, resistance, magnetism. Ohm's band, and you will still be able to take types. Bob Dunham, in the guise of his Law, inductance, capacitance, measure advantage of an excellent receiver/servo Dunhams R & R in Lake Havasu, Arizona, ments, and so forth. Completion of this package. is making a number of switch guards of course will give you a firm grasp of the TRY ENOUGH TIMES various sizes for other common switches. very basics of present day electronics. And you will get the right product at An assortment of five guards, for five of On this, you can build, with a follow-up the right time. At least a couple of times the most commonly used switches, can course on AC Electronics, then on to in the past, Twinn-K has sent me batches be obtained for $1.50, postpaid, or tell Semiconductor Devices, Test Equip of AJ’s brand tires, the first time was a Bob the screw spacing and knob open ment, and so forth, limited only by your few years ago when I was doing Race Car ing dimensions of your switches, and he own interest and time. The courses ate World magazine and I couldn’t find but will try to match a guard to it. not expensive, averaging around $55, a couple of sets of tires in the whole box When the fish in Lake Havasu aren't and worth every cent! that actually worked acceptably. Later biting, you can call (602) 855-6934, A recently introduced course which on, they sent more . . . with the same otherwise a letter to Dunham's R & R, (Is may be of interest to those of you with result, except that I didn’t write anything that like I & I, Bob?), P.O. Box 34002, Lake limited time is entitled “ Electronics for about them. If you can't say something Havasu City, AZ 86403, will get you the Hobbyists," which is a crash course of nice. .. desired information. some of the subjects mentioned above. But now they have released a new BOOK SHELF It’s description in the recent catalog series of molded front tires for 1/8 cars There are few things that you can't even mentions R/C modeling. and they look real good. To be honest, I learn from books . . . especially if you For better understanding of the sub have yet to race on them, but the guys at can combine theory with practical ject at hand, some test equipment, and Delta say they work and that they are experience! Such seems to be the idea the use of an Experimenter/Trainer is using them, so that is good enough for behind a number of books available for recommended; all described in the me. The soft compound is all that I have some time from a well-known company, latest catalog, available free from Heath mounted, as that is what is supposed to Heathkit, of Benton Harbor, Michigan. kit, Benton Harbor, Ml 49022. Why not work best, although there are other Fortunately for many of us, it is consis ask for a copy and read all of the detailed compounds available. The real good tently adding to the list, and naturally, information. Tell ’em Model Builder news is that the tires are consistent the subject of these books is all on our sent ya. Some of the courses are even from set to set and they aren’t badly out favorite subject of electronics. The good for college credits .. . and are of balance, as are most other molded series, entitled Heathkit/Zenith Educa deductible from your income tax tires. In addition, they come pre-trued, tional Courses take you pretty far up the how can you go wrong? shoulders rounded nicely, and all. electronics ladder, with courses dealing Till next month, don’t forget to fly low Mounted on Delta wheels, they come in such especialized subjects as micro- and slow! · out just over 2-3/4 inches tall, the usual rocessors, and TTL and CMOS circuits, size for fronts. Even though I did touch owever, they also have courses for the them up just slightly, bringing the height complete beginner, in a series of recom R/C Auto . . . . Continued from page 43 down to exactly 2-3/4 inches, as well as mended subjects. getting them perfectly round, it would Each course, which comes complete at full throttle. It might have been a be possible to mount them (carefully) with a manual, phonograph records million in one shot, but the switch is a and race on them without any truing or (cassettes are optional), electronic com little wimpy anyway, so for the next sizing at all. ponents for experiments, and an end- while I did without a switch completely, If you are tired of balancing molded of-course test, covers one principle unplugging the pack to turn things off. tires, as well as having been frustrated by subject, a certain phase of the wide and After getting tired of the bother, a the lack of consistency of same and the ever expanding field of electronics. Futa ba switch was wired in . . . And now difficulty in getting them ground to size, Recommended first course is one en you know why one of the cords was cut check out what AJ’s has to offer. You'll titled DC Electronics, through which up to get the plugs from it. like ’em. · 8 4 MODEL BUILDER R/C Boats .... Continued from page 45 straight ahead. Many model builders just trim the rudder to the left at the cost SIZES! of several miles per hour in speed. This going to the right is caused from Competition-Proven 1 the torque of the left hand propeller making the hydro drift to the right. “ By mounting the rudder on the left OCTURA side of the strut, the offset strut or left trim is no longer needed. The drag of the rudder blade will pull the hydro to the X-SERIES left. The rudder drag on the right hand side only increases the right drift which is not needed or desirable. PROPELLERS “ We have mounted rudders on the left side with adjustments to move the X-tra Speed!...X-tra Performance! rudder as close as 1/2 inch from the strut to as far out as three inches. One and one-half inches distance between the FOR PERFORMANCE YOU’LL BE PROUD OF... rudder and the strut seemed to provide These, as all Octura Propellers, meet the most exact the top speed along with the best ing requirements. Available now in beryllium copper. Fit 3/16" shaft. Check your local progressive hobby cornering. The rudder drag is going to shop. exist no matter where the rudder is Χ4Λ0/3 RECOMMENDED located. So if this drag can be used to an 3 5 OUTRIGGER X445 APPLICATIONS 1 X447 advantage this is reason enough to • 7.5 OUTBOARD mount the rudder to the left of the strut. 75 DEEP VEE X450 HOW HIGH’S THE WATER MAMA? X455 7 5 OUTRIGGER X 4 5 5 /3 65 SCALE HYDRO The title to a Johnny Cash song could X457 * 65 DEEP VEE well serve as our next lead. Mike Heish- X460 man from Texas called the other evening (OCTURA) X462 T 6 5 OUTRIGGER to discuss 3.5 tunnels. He wanted me to a « 1 0 0 f ° r •X467 90 DEEP VEE know that not every Texan who enjoys « lo s and pH« I "supp’itt I model boating is like the fellow I men cata net to: w 250 Bore 3 Indicates 3 Biaoed Propeller tioned back in my May column who only "SINCE 1954’’ liked “ them big hydros.” During the 7351 N. Hamlin Ave · Skokie, IL 60076 course of our conversation, he men OCTURA MODELS, INC. tioned that one thing I’d never men tioned in my column was how to go that it is controlled by a government limits the times when model boaters can about obtaining a place to run model agency that is supposed to be meeting use the pond. I feel we have all the time boats. Well, there’s lots of things I’ve the recreational needs of the population we need. We just cannot run our boats never written about in this column and it services. It then becomes a matter of any time we feel like it. This assures the that certainly is one of them. I suppose convincing the controlling agency that general park user guaranteed park that's partly because I’ve always been model power boats are a viable recrea periods. This has proven to be a good blessed with a spot to run and haven't tional pursuit. This is going to take some public relations tool for our club. considered it a problem. But I suppose good public relations on the part of those Another suggestion to those seeking for some folks it is a problem and attempting to gain access to the pond. to use a public facility istodo something certainly worthwhile of some con The first thing the agency is going to extra to help in the maintenance of the sideration. ask for is insurance coverage. This can be area you plan to use. Many park agencies I can’t offer any help to those of you easily obtained by joining either of the are facing budget cuts due to funding who may happen to live in an area where two national model boating organiza shortages. This is very true of the local I can’t offer any help to those of you tions, the North American Model Boat agency in my area. Model boat clubs can who may happen to live in an area where Association or the International Model provide volunteer help to assist in doing there just isn’t any available water. Well, Power Boat Association, and forming a things that the agency has had to cut. It I suppose you could construct a lake. model boating club. When dealing with might be no more than providing a Seems like site costs and construction governmental agencies I was asked how group of people to help in a spring might put this idea out of the realm of many others were interested in using the cleaning of the park. Let the agency practicality. Usually there's water facility for the same purpose. When know that your group is willing to help around, the problem is gaining access to dealing with such agencies, presenting in whatever way it can. it. an organized approach is vitally Take the time to get to know the The first item that model power important. person responsible for directing the boaters must confront when seeking a The next thing model boaters must agency that manages the pond where place to run model boats is the fact that be willing to do is share the facility with your club runs their boats. Through boats are not going to be accepted in other users. I’m thinking specifically of good public realtions, your group can certain locations. Even if noise were not fishermen who often fish from the become a valued and recognized force. a factor, and it is a very big factor, high shoreline of many ponds. Model boaters There are going to be times when this speed power boats don’t really lend need to be especially aware of the fact recognition is important. I realize there themselves to most ponds and lakes that when they are using a public facility are many people who would just as soon located in cities or densely populated they do not have exclusive use to that not have me and my friends running suburbs. facility. Our club has an agreement with boats while they are in the park to enjoy The bodies of waterthat can best meet the local county recreation department a picnic, a walk, or just getting away for the needs of model power boats are specifying the days we can operate our some quiet time. The head of our county often located in parks somewhat isolated model power boats along with what parks has received numerouscomplaints from populated areas. One of the advan hours are available. This arrangement about the model boats running at the tages of using a body of water in a park is has worked out very well because it park. However, our club has been a SEPTEMBER 1982 W H fN C O N I ACTING ADVERTISERS. TELL EM M O D LI BUILDER SENT YOU! 85 Trim the acetate as close to the letters as GIANT SCALE CHOKE possible and then peel off the backing and gently press in place. Paint the wheels with three coats of • For TILLOTSON 4 and WALBRO 55 Floquil grimy black. Cut out the hub carburetors caps from card stock and decorate with • Easy installation—uses two existing tissue before gluing in place. carburetor screws The windows are cut from thin acetate sheet and applied to the model with R/C • Positive acting, spring loaded choke 56 glue. You may need to thin a small arm amount of this glue with a little water • Can be servo or manually operated before use. • Floating neoprene disk "chokes” FLYING better than a finger and easier. Use one loop of 1/4-inch FAI rubber for low power test flights. Balance at the place shown on the plans and test glide. TATONE PRODUCTS CORP. Do not throw the model into a stall. A t?09 Geneva *ve San Francisco Ca 9an? <415 ) 334 7189 slight bending up or down of the ele vator should correct any stall or dive these different kits. Anyone interested tendency. Start powered flights with no JVS CLAIM JUMPER in obtaining a copy can send me a more than 200 turns. After satisfactory A Fiberglass Masterpiece stamped, self-addressed envelope for a testing, use a four-strand motor of 3/16 copy. JERRY DUNLAP, 119 CREST- FAI rubber 28 inches long. A motor this W OOD DR. S.W., TACO M A, WA long in relation to the distance from the 98498. · motor peg to the prop hook can be hard to manage. To help tame it down and Daphne...... Continued from page 55 allow for better weight distribution after the power runs out, I recommend pre tensioning. To do this, install the motor tissue. Lay the tissue over this area and in the plane and wind in about 75 turns gently pull out wrinkes and pat down into each loop separately, then put both Manufacturers of the World's finest the edges. A razor blade and a long loops back on the winder and wind in fiberglass Model Hydro planes sharp pointed scissors are good tools to another 75 turns BACKWARDS, then Send 50« or stamps trim away the excess tissue. Don’t cover connect to the prop shaft and wind as if for catalog. too large an area at one time. Water to fly and release prop. When the motor JVS Products, shrink with a very fine mist. Don't runs down it will look like it was braided J V S 39292 Spanish Bayonet, saturate.. .just enough to sag the tissue. and will not bunch up in the back of the "T PiODucis Box 452, Anza, CA 92306 The model in the photos was covered fuselage, disrupting the glide. The pre with white and blue Japanese tissue. The tensioning will last the life of the motor, good client for the parks and done some darkest color in the trim is black domes as long as you do not remove it from the extra things to gain support for our tic tissue. Apply the blue and black tissue prop hook or motor peg. activities. This is vitally important trim with a solution of 30% dope and Happy flying with your Daphne. · because people are going to complain. 70% thinner, used sparingly. Cut out the But if you've done a good job of inform fuselage registration numbers from blue C/L ...... Continued from page 47 ing the agencies involved and properly tissue and attach to the model in the promoting the hobby, such complaints same manner. When dry, brush on three can usually be placed aside. coats of non-shrink dope thinned about it may be difficult to locate in smaller INTERESTED IN SPORT 40si 50% with thinner, allowing a few hours quantities. The Seal® laminating film Kelly Wilson, the N.A.M.B.A. District 7 of drying time between coats. Sig Lite suggested by Ken Simpson in the June Sport 40 Chairman, sent me a really well Coat is a good, low-shrink butyrate issue of this column would also work done compilation of different unlimited dope. A lot of rubber modelers prefer great, even though a very small weight hydroplanes that can be modeled from nitrate dope, but it is not as easy to find. penalty would be involved, as this film existing kits in the Sport 40 class. Among The small registration numbers on the does have an adhesive on it. the manufacturers listed are: Dumas, rudder and the word ‘experimental’ The idea of using Saran Wrap for Steve Muck, JVS Products, Octura under the side windows are dry transfer covering intrigues me. You know how so Models, and R/C Glass. A number of letters. Rub the letters onto a piece of many Combat fliers are always just different unlimiteds is listed for each of clear acetate “ press apply" material. finishing their models the night before the contest? Might be a good idea, just before covering the last two models, to INDIAN CITY RADIO CONTROL CLUB make up a couple of sandwiches for the Presents next day’s lunch. A ham-on-rye could serve nicely as tip weight, slip it in the last rib bay on all-wood models, carve DETROIT EXPO IV out a cavity in foam models and proceed with the covering. Next day your lunch is Greater Michigan Modelers Show ready and you know it won’t be left beside the front door. Combat fliers may PLANES · BOATS · CARS forget all manner of things on contest MANUFACTURERS, STATIC DISPLAYS, SWAP-SHOP day, but never forget the models. Be sure to use these two out-to-lunch models in the first rounds and as they get October 1,2,3« 1982 smashed, at least your lunch is ready for you. Eight Mile Artillery Armory , Oak Park, Michigan With a foam model, where the wing panels themselves are only rarely totally For Info.: 6909 Monroe Blvd., Taylor MI 48180 destroyed, it would even be possible to slip in some of your favorite soup. Smash 86 MODEL BUILDER Fox Competition Quality Model Airplane Products for your Modeling Pleasure! THE FO X .19 BB This is a brand new engine design from Fox. with power equal lo the mosl potent 19 on the market Runs great on straight alcohol and castor oil and has the ability to FO X FUELS: reposition the exhaust to either side or the rear, which #30402 Gold Star Pt. $ 2 75 ever fits your cowling considerations best It screams, #30403 Gold Star Qt 4.50 yet hand starts easily! #30405 Gold Star Gal. 13.95 #22000 $ 8 9 . 9 5 #30102 Superfuel Pt $ 3.05 12 Volt Glow Plugs (Dry Cell or Nickel C ad) #30103 Superfuel Qt 5 05 2 Volt Glow Plugs (for Lead-Acid Battery) #30105 Superfuel Gal. 16.75 FO X .45 BB-RC #30202 Duke’s Pt. $ 3 40 THE F O X This popular engine is becoming the nation’s favorite 45 #30203 Duke’s Qt. 5.60 Docile, durable, yet it products enough power to fly most #30205 Duke’s Gal. 18.95 GLOW PLU G S 60 sized airplanes. A versatile choice that really performs #30302 Missile Mist Pt. $ 4.20 #30303 Missile Mist Qt. 7.60 •2 4 6 0 0 $ 9 4 . 9 5 #30305 Missile Mist Gal. 25.90 55 Gallon Drums of Fuel are available Drums shipped Freight Collect FOX .4 0 BB-RC - payment in advance. Our Fox 40 BB is a rugged, well-developed 40 that has the most lugging power of any 40 powerplant on the market. It's ideal for Sport and Pattern flying for GoldStar (Drum) $180.00 moderate sized aircraft Duke’s Fuel (Drum) 320.00 Missile Mist (Drum) 500.00 #24100 $ 9 4 . 9 5 »40lOi Standa'd Short Si 19pach *40103 Standard Short SI t9 e a c h *40201 SliiMdaid long i 19»Mr* •40203 Standard Long 1 19 each »4050? R C Shon 1 69 each •40503 R C Short t 69 each Many Full Size Engine 3-Views are available on request «4060? R'C Long 1 6 9 ra c h ■40603 R'C Long t 69 each for your designing convenience The Fox Glow Pluas have been the favorite of thousands Our Hot Line: (501) 646-1656 for many years They feature a machined idle bar and a F © X mfg- co 20% rhodium alloy element. A variety of sizes offered 5305 Towson Ave., Fort Smith, Arkansas 72901 U.S.A. the model, recover the nourishing At any rate, the process goes some can find the thinners doing funny things panel, peel back the top piece of cover thing like this. Mix wallpaper paste, it to the foam. ing, squirt some fuel on the ground, can be quite thin and still work fine. Trim As mentioned in the letter, this light it, heat soup over the fire and enjoy some medium weight gift wrap paper to method is ripped from Wilkens, develo the only hot meal of the day. Would proper size. Dunk the paper in water. per of the Superstar series of FAI Combat make losing a model, and possibly the When soaked hang up to drip dry. Using models. Have used it myself on three contest, an almost enjoyable process. a 3 inch wide brush, slop the paste on the batches of six-at-a-time models. First Wait a minute. To really enjoy losing, a model and then plop the damp paper time through was a real mess, as I didn’t hot cup of soup won’t cut it .. . but a onto the model. Smooth out ail the know about soaking the paper first, good, stiff drink might. Before that do wrinkles and let dry. When dry, glue the although I did get it on OK. On the next or-die match of the day, pour one of motor mounts, boom(s), etc., in place twelve models, I switched to the those pre-mixed cocktails into a cavity in and add your AMA number, using a felt- cheapest tissue I could find in a hobby the outboard panel and seal it up with tip marking pen. Finally, the model can shop, the stuff sold by Sterling Models. sticky mylar, FasCal would work fine. By be fuel-proofed, a spray can of Pactra Bright colors, very light, but absolutely the end of the match, that throbbing Fox fuel-proofer works OK, as do spray cans no wet strength, so slapping it down dry Combat Special will have mixed your of automotive touch-up paint. If you use on the paste covered panels was the only drink like you have never had one mixed lacquer, be careful, as a heavy first coat way to do it. before. If you lose, no further instruc tions needed. If you win, and want to keep on winning, stay away from the spirits, instead pour a tall, cool one for MOVING TO SOUTHERN CALIFO RN IA? the guy you just trounced. He might even let you win next tim e... MAKE SURE YOU GET A HOME AND FOR A TRULY YUKKY MESS... WITH A MODEL WORKSHOP ! ! You can cover foam models with gift wrapping paper, stuck down with FOR ALL YOUR REAL ESTATE NEEDS. common wallpaper paste. This sugges CONTACT: tion come from (and I only think I am ANITA NORTHROP getting the name right) Nur Iskandar Taib. If that is not the right name, I apologize, Nur, uh, lskandar(?), but MLS right below this name he reminds me NORTHROP that over eight years ago, when starting on a very short career writing for Ameri R e a ! E s t a t e 03 can Modeler, I asked for contributions and obscene mail, so I am justifiably 621 West 19th St., Costa Mesa, California 92627 (714) 642-5062 suspicious. SEPTEMBER 1982 WHEN CONTACTING ADVERTISERS, TELL ’ EM MODEL BUILDER SENT YOU! 87 Valley, California, categories will include 1939-1941 GAS MODEL free flight rubber, towline, gas and electric powered models. Additionally, CLASS A, 46" SPAN (SAM approved FF/RC) for the first time, there will be a class open to any scale flying wing. Chief B $11 95 ■ $21 50 Judge Bill Stroman points out that this CLASS C, 72" SPAN (SAM approved FF/RC) opens the door to a broad variety of flying wings, including those of foreign B $14 95 ■ $27.95 origin. Scale wing models may employ any source of power, and they will be 80" R/C ASSIST (SAM approved R/C only) judged upon realism of performance as B $19 50 ■ $36 95 well as authenticity. Why not participate in this fun, low-pressure event? THE GORDON BENNETT Mile Square Park was again the site of B PARTIAL KIT: Plans, Ribs, Wing & Empennage Tips. the international balloon race during ■ FULL KIT: Partial Kit PLUS all Plywood, Wire, Sheet & Stripwood required. the month of May, and attracted entries Covering & Cements not included. representing France, Germany, Japan, LEHMBERG ENTERPRISES. 2646 BOLKER DR . PORT HUENEME. CA 93041______(805) 9846639 Switzerland, and the United States. Mother Nature was rather unkind this Still, the tissue did work pretty well, Kustom Kraftsmanship, will kick in with year, and her gusty winds cancelled the although it was a real mess getting it on, some 1/2A speed goodies. traditional tethered hot-air balloon especially as the whole model should be To be held on Thursday following the rides, as well as the demonstration of the covered at once to avoid warps. And completion of Jr. and Sr. Fast Combat, Peck-Polymers R/C blimp. But the there isn’t much strength from the the event will be double elimination and estimated 25,000 spectators were treated covering when using tissue, so the will use slightly modified Fast Combat to Goodyear blimp fly-bys, helicopter model has to be designed with this in rules. Entry fee will be $3.00, with the rescue demonstrations, static displays of mind .. . which the Plastic Nasty was money going to theTeam Fund support ultralights, sailplanes and a Polish Wilga. from the beginning. The real shocker ing our FAI Combat team. Yes, you can The latter was intended to be an active with this method came when I mixed up use your "cheater" .051’s if you want. display, but was, alas, grounded by red a huge batch of paste, only to find out a AND THE HOT TIP FOR tape, according to a public announce few weeks later that, stored at room YOU SMALL-BORE FANS... ment. temperatue, it ferments into an awful I’m not sure how to word this, for fear The guest of honor was world- looking, worse smelling p ile ... of getting me and/or Model Builder in renouned designer/philosopher Buck Hey, I guess that name is right after all, trouble, but first realize that I do have minster Fuller, who favored the audi further in the letter is mention that quite a number of contacts in the hobby ence with an enlightening discussion of Iskandar is from Malaysia, studying business, both through this magazine his geodesic domes, which share more geology, and that he would like his and through working for a hobby dis in common with balloons than their name and address printed, so that CL tributor. Not all of these contacts and general configuration. As it turns out, fliers in the area of Bloomington, Indiana conversations with same can be named very large examples of these domes can get in touch with him. Ok, he is at or quoted directly. But if you want to be would appear to exhibit rising tenden F117 Barta Apts., Lingelbach Lane, flying anything 1/2A in the next year or cies as the air within them is heated! Bloomington, IN 47401. Or call (812) so, I would suggest stocking up on A bonus was the massed fly-over of 332-5689. engines and parts. Even if the antici some thirty (count ’em, 30) biplanes. SMALL-BORE COMBAT pated does not happen, prices are on a Definitely a mixed-bag, the formation AT THE NATS... never-ending upward spiral anyway, so consisted of Wacos, Stearmans, a DH Rich von Lopez writes, as he does you can’t lose. That’s all I can say for Moth, a SPAD (!) and a potpourri of every year about this time, asking for a now. If you can’t figure it out, you smoke-equipped aerobatic types. The plug on 1/2A Combat at the Nationals. probably can’t even start one of the spectacle of such an array of two- And of course we can slip this in, as the things anyway! · wingers soaring over the colorful helium event can be great fun. Last year, Rich balloons was most memorable. And next even got Riley Wooten himself to fly. year, even more massive participation is Hannan...... Continued from page 48 Rich will be the CD, again this year, has a planned! promise from Cox to sponsor the event. SPEAKING OF GAS-BAGS In addition, Joe Klauseand his company, ber 14th, at Mile Square Park, in Fountain Frank Scott sent a clipping from an Ohio newspaper announcing a new dirigible factory there. Wren Skyships intends to produce a metal-clad rigid JOHN POND airship with a capacity of 120 passengers, to be transported at about 150 mph. Meanwhile, in Pennsylvania, long time rotorcraft designer (and model Old Time Plan Service builder) Frank Piasecki is working on his Heli-stat project, a heavy-lift dirigible The largest selection of plans in the world at the most equipped with four helicopters reasonable prices Each list $1 00 (attached) to provide thrust and control. All 4 for $3.00 THAT WHITE CANARD AGAIN No. 12 OLD TIMER F/F GAS Our request for information relative No. 12 OLD TIMER RUBBER/TOWLINE to the very early White canard “ home- No. 12 OLD TIMER F LYING SCALE A through K built” continues to draw response. Now, we are pleased to present a photo of the No. 12 OLD TIMER FLYING SCALE L through Z first Peanut Scale version, constructed New plans prices effective Oct. I, 1981 by Don “ The Wiz” Assel. Actually, he P O. Box 3215 built two of them, as the first “ blew up” San Jose, Calif. 95156 when the longerons failed under a fully- wound motor, so the second incor Phone (408) 292 3382 porated spruce fuselage members. In 88 MODEL BUILDER the photo can be seen a silhouetted and 6 inches deep in dust. We were to photograph of "W iz” himself. Perhaps get a ride next afternoon, soon as school INDOOR MODEL SUPPLY Model Builder may be able to present a was out. Well, I nearly boiled the old '26 OUTDOOR l INDOOR FL TERS FOR THE NOVICE SELECT SATIN SMOOTH SHEET BALSA full-size plan of this airborne oddity in a Chevy covering the five miles and Yard Birds w Span 3 IMS Gliders »2 Spjn future issue. (How about it, Wiz? wen) elevation getting out there. ‘Where's the HOW TRUE Autogiro?’ I exclaimed. O h, he left “ Criticism seems to come mainly from 'bout an hour ago.’ A dark day in the those who are not willing to contribute local boondocks that was!” anything else.” Paul H. Poberezny, FROM THE MOUTHS OF BABES president of the Experimental Aircraft Bruce Kennewell, writing from Aus- Association. trailia: “ . . .my daughter can now recog AND SPEAKING OF THE EAA nise and say the word "plane” . . . Putting Wings on Dreams is the title of although it sometimes comes out ‘pain.’ a recent publication devoted to the Which, as every aeromodeller would INDOOR ENDURANCE RUBBER MODFLS aircraft in the EAA Museum, the world's agree, the hobby can be sometimes!” THE EASY 8 2PARIOR 3 PARLOR PLANES largest private collection. Bountifully HADLAND REPORTS illustrated with photographs, it features Butch Hadland sent along the results many subjects of interest to modelers, from the indoor scale Nationals held at such as their reproduction Wright Flyer, Buckinghamshire, with the following the Wittman Tailwind prototype, a comments: “ The event was held in an enclosed, roofed shopping precinct Corben Baby Ace, a Quickie, the proto THE "TIME MACHINE" PENNY PLANE type Evans VP-1 Volksplane, Rand KR-1, approximately 300 x 200 when empty. By • f u l l S · / · P Ijn » • f u ll S i r · P to p JiQ Pober Pixie, Rutan Vari-Viggen, the some masterpiece of planning and • PlCtU'0 iilu tt'4l«0 Bede BD-5 prototype, the Breezy proto double-booking, a plynth the size of a • C o n d e n s e · P e p» · • UHi j lig h t Batsa type, an original 1911 Curtiss Pusher, the boxing ring was planted right in the • Mini Bearing Ryan SCW prototype, the Laird Super middle of the arena. Surprisingly,despite • Micro Washers • Pirelli Rubbe· Solution replica, Warwick's Hot Canary, much disgruntlement, it didn't cause • High Performance much disruption!” and many more. Although not pictured, The World's 1st our own Walt Mooney's Honey Bee is According to Butch, the MIAMI (Flor Ornithopter Kit* also in the collection. ida club) rules were employed for the Fascinating' Peanut class, while regulations similar to 2 Minute Flights Priced at a reasonable $4.95 postpaid, WEIGHT UB OZ the compilation may be ordered from: the AMA gas scale category were used INOOOR MODEL AIRPLANES by Ron William· EAA FOUNDATION, Box 469, Hales for open rubber . .. rather unusual to 264 Pg· and Ovar 200 llluatratlon· plus 2 FREE Corner, Wl 53130. say the least. As to participation, the Full Slza Plan Shaat· for I.M.S. Easy "B $11.05 INDOOR MODEL AIRPLANES by Law Gltlow Please tell ’em Model Builder sent breakdown was as follows: 46 Pg·. A Ovar 100 Illustration· (reprint) _ _ $3.95 you! Peanut Scale: 28 entered, 20 flew PEANUT POWER by Hannan. 60 Pgs $8.95 BOSTONIAN COMMENTS Rubber Scale: 25 entered, 16 flew INDOOR BALSA PACK $6.95 P NUT PACK $6.95 ROLL OF MICROLITE COVERING______$3.25 From Dave Gibson, Canton, Ohio: "I C02/electric: 22 entered, 9 flew CONDENSER PAPER $2.50—WASHERS $1.50 was in Boston recently, and every street A satisfying aspect of the meet was the RUBBER LUBE $1 50-CEMENT $1 50 great variety of entries, with hardly any THRUST BEARING: Now Tiny 50 Now Dual 1.00 sign reminded me of Bostonian models. NEW MARK 1 WINDERS-16:1______$11.95 Interestingly, Boston is undergoing a duplication of types. NEW SMOOTHIE WINDERS-6:1______$3.95 building boom. Hopefully so is the Hadland still feels strongly that more 6.1 Wlndar only $1.95 with $25 Ordar Bostonian concept. It is a great idea at 14 universal rules are needed for all classes ALL ORDERS A KITS ADD 10% POSTAGE grams. The Hyannis Helio at 7 grams of free flight scale. His views deserve Minimum postage $1.50 would be very esoteric. Personally, I careful consideration, since he is one of 16 PG. CATALOG $1.00 don't think there is an argument the few enthusiasts who not only builds between the 7 gram and 14 gram people. and wins, but proxy-flies, serves as a BOX C, GARBERVILLE, CA 95440 The models are very different and judge and Contest Director. should not be compared. So call them QUOTE FOR THE DAY drawing and covered with condenser Bostonian West and Bostonian East and "Water-cooling an aeroplane engine tissue lightly air-brushed white with let it go at that. OR . . . be Solomon-like makes about as much sense as air- thinned Floquil, flew with .075 Pirelli. and divide Boston in two parts. All cooling a submarine!” Bruce Leighton, Heavier models and flown outdoors will, Bostonian West models must be named U.S.N., from the remarkable book The of course, need more power. Experi after places on one side of the line and Speed Seekers. · ment with power and prop pitch for all Bostonian East models must be named optimum duration. Fly in as large right after places on the other side of the line. GUPPY...... Continued from page 49 circles as your site will tolerate. Biplanes (Absurd).” flown left with torque tend to spin rather ANOTHER CELEBRITY MODEL BUILDER easily. Mariette Hartley, the actress who with sides with heavily-thinned dope before This is a really simple Peanut and can James Garner has made the Polaroid the plane is assembled. Paint the engine easily be built lightly for long, low- camera commercials so popular, is cylinders flat black, the heads metallic powered flights. It’s so ugly, I think it’s married to Producer/Director Patrick gray and the stacks flat brown. attractive, and the negative stagger Boyriven. Among his spare-time avo The steerable tail wheel assembly wings are unusual for the biplane nuts. cations is constructing model aircraft, used on the prototype is simple and light There is enough stagger so that the and an issue of the Los Angeles Home and puts a little detail on the model. lower wing can be mounted at a slightly Magazine featured a photo of him Sliver up some bamboo to about 1/32 higher incidence than the upper, for assembling a large scale amphibian from and 3/64, scrape the corners off and longitudinal stability. The theory is that what appeared to be Cleveland plans. assemble a piece at a time with Ambroid. the forward wing will stall first when set PITCAIRN MEMORIES When finished, go over each joint with Prompted by our review of the book epoxy smeared on and smoothed with a Legacy of Wings, Bill Kee of Idaho, wrote sharp stick to reinforce, and paint red. Make y°ur Glow *món.* Diesel to share this recollection from the 1930s: The landing gear struts should have a FIGHT INFLATION! “ The first (Pitcairn Autogiro) PCA-2was thin piece of insulation from a length of Converts in m inut«—no special tools required. in my town for passenger-hopping. I was telephone house-wire or similar stuff .049 swings 7-3 @13,000-OS .90 20-6 @ 6.500 honored, along with a buddy, to keep slipped on and painted red before the Send 404 & SASE (or literature. the machine wiped down between hops wheels are mounted. Davis Diesel, Box 141, Milford, CT 06460 . .. our old city field being dirt runways My model, was built as shown on the Cell after 6:00 p.m.: (203) 877-1670 SEPTEMBER 1982 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 89 ing. The hole through the center of the eyelet was about 1/4 inch (0.6mm). Aircraft with dihedral would have their R/C Race Cars eyelets placed adjacent to the ribs and outboard of that part. Draining conden + 1:8 World Champion Gas Super-J sation, having gathered dust from within ♦World Champion Picco 21 Racing Engine the wing, would stain the fabric's inner + 1:12 Electric Phaser 120 face. + 1:18 Electric “Pocket Rocket" The tapes applied over the rib stitch We manufacture the most complete ing on unpigmented undersurfaces line of gas R/C race car accessories. would be slightly darker than the fabric which was next to them. The linen, We manufacture competition oriented about 72 threads per inch (72 threads per 1d2electric race cars and accessories. 25.4mm), was only about the thickness Send $1.00 for catalog package of this sheet of paper — and would allow DELTA Mfg., Inc. light to filter through. When the tapes 27 Racecar Court, Lorimor, Iowa 50149 were prepared for application, they were doped securely into place. This act USA Phone: (515) 763-2220^ would add to the amount of color * * *********************** * * modification of the tapes, largely * ¥ fabric which took the dyes much better through additional tinting, and slightly * ÍM ¥ through increased opacity. This use of ♦ WANDIT ¥ — but it was slightly weaker than before * ¥ treatment. Additionally, the coarse more dope or varnish would darken the ♦ Dealers Invited ¥ nature of the fabric required heavy tapes sufficiently to take them from » iune year warranty ¥ * ¥ rollering which crushed most of the Methuen (3-4)(A-B)2 to (3-4)(A-B)3 for ♦ ¥ ♦ ¥ fibres and contributed to its weakness. British aircraft (and those of French * W et or Dry ¥ The color of this fabric in its pre-doped manufacture during the period that they ♦ Stick on Abrasives ¥ * ¥ state would be Methuen 3B3. used an equivalent doping scheme). The * A Keen Machine" that gives exceptional ¥ * sanding control for an excellent finish As has been noted previously, sunlight same degree of change would be seen in * ¥ had a deleterious effect on fabric that German aircraft before they began the ♦ 89 95 Basu mel I flat Wand and I each ¥ of 6 g rits ¥ was not protected from its actinic rays. use of pigmented dopes on undersur * ¥ * 10 8 95 Builder Special mcl 2 flat. 1 halt After the introduction of the printed faces. After the French and Germans * round wand and 5 eath of 6 g rits ¥ ¥ camouflage patterns in Germany, some began the pigmentation of undersur * 129 95 Deluxe includes 3 flat. 2 half ¥ * round wands. I buff wands and of the undersurfaces were still in faces, the degree of change would be ♦ 1 0 each of 6 g rits ¥ ♦ ¥ unprinted material and these were very slight — if at all noticeable. + Additional Wands and Abrasives available ¥ * See your local hobby shop ¥ doped and over-varnished with a syn Repairs, when working on a replica, * ¥ thetic medium that produced a yellow would be unlikely to encounter the next * ADDIS ELMORE Eve No -214» 288 5789 ¥ * P0 Bo* 266 · Mesquite Texas 75149 ¥ ish-tan color: about Methuen 4C7. problem. However, when repairing — + Ψ+*+**#****»*+»**+«»*++* + Ψ There is one point to remember about or duplicating a repair — in miniature up this way and the rearward wing, any of the combatants’ unpigmented sized aircraft, take care that the smaller which is still lifting and behind the fabrics and their appearance: the dopes size does not lead you astray — paint the center of gravity, will pull the tail up and and varnishes did not penetrate the patch, not the whole chord of the wing! bring the ship out of the stall. · fabric to such an extent that they would When working at smaller scales, it is be impervious to internal strain. Wings, necessary to think in the scale! for example, aren’t enclosed completely CAMOUFLAGE AND F/F Scale ____C ontinued from page 53 in fabric — they need to breathe and OTHER COLORING drain. It was necessary that air circulate Infantry soldiers are taught that the camouflage patterns on her fabric, the within the wing to work against the enemies of concealment are the four resulting colors were modified by the formation of mold promoted by stag S's: Shape, Shine, Silhouette, and hue of the fabric and the intensity of the nant moisture — and to ease the tem Shadow. Err in any one of them and you dyes diminished toward a greyed version peratures and pressures that might burst can reveal your position. Operators of of the intended color. A partial cure was the fabric. The use of drain eyelets at the aircraft were well aware that the same found in a revised treatment of the trailing edge was used to meet these rules applied in the air. It is probable that fabric: the mixed yarn was tubbed and problems. The eyelets were of soft brass; the first camouflage was applied to those steamed to take much of the color out of a two-part artifice that was set into place aeroplanes that were involved in recon- the darker materials. The result of the with a special tool, a fibre washer on naisance. The most effective recce work treatment was a partially-bleached each side of the fabric to prevent chaf- is carried out by those who get in and get out with the information intact — and 0VER 50 CONSECUTIVE STARTS WITHOUT RECHARGING the enemy does not know that they have accomplished the mission! INTRODUCING THE The easiest stratégem that can be NIST ARTER m employed to begin a camouflage is to PAT PENDING A new and completely revolutionary concept of break up the outline: disguise the shape. power for glow plugs in model cars, boats, air planes. helicopters, anything using the 1.5 vt. The main parts of an aeroplane are very Standard plug for glow engines Rechargable. regular in outline, consisting of simple (up to 1000 times). Fits in your pocket. Works sideways or inverted. Fits through cowlings. Uses rectangles, squares, triangles, and cir Mead Lock ™ plug adapter. Stays on the plug, not in the propeller, mcl. charger & instructions. cles. Nowhere in Nature can such regu 90 day guarantee After that, if anything fails larity be found: as witness, the oft (normal usage) we will repair or replace it for only 56. for up to one (1) full year!! S E E Y O U R quoted phrase, "Nature abhors a straight DEALER OR CALL US - BANK CARDS OK. COD line. ” Hiding the geometric regularity of OK. YOU PAY SHIPPING 9 5 Man’s works needs little more than a See Your Dealer brush and a few pots of paint which are 13506 Glendundee Dr. of different value. The use of the word Herndon, VA 22071 "value” has been advanced with some care. Value, in this usage, refers to the SERVICE (703) 435-5805 apparent lightness or darkness of the 90 MODEL BUILDER paint (or color) on a scale of greys. The importance of this factor can be seen if one takes a black and white photograph of an object covered in the traditional Precision Tools red and green of Christmas. Although your eyes will see two very distinctly contrasting colors, pan film will probably Taps, open end record them as one value of grey! This wrenches, hex nut driv phenomenon can be found in so many ers, Phillips and alien color combinations that care must be drivers, and screwdriv exercised when making color choices. ers. The tools feature The importance of careful selection interch an g eab le or indi becomes apparent when one remem vidual handles and Tuff- bers that distance will "grey” all colors, Tempered tips. Pack thus eliminating the hue which may aged in convenient have been the only distinguishing factor. molded plastic storage What use to disguise shape with colors cases. Send 25 cents for complete size listing that lose their contrast at a distance? and catalog. K & S En Shape must be lost within the back gineering, 6917 W. 59th ground no matter what the distance, St., Chicago, Illinois that is, if a camouflage scheme is to be 60638. Telephone: 312/ successful. But the "value" is only part of 586-8503. the art, the hue (color) must be considered. Colors which appear to be of, or are related to, the background against which an object is seen will aid in the elimination of another of camouflage’s S factors: Silhouette. Avoidance of silhouette is particularly difficult for an light surface. The French carried the was, by the French, a considered form of aeroplane. Because it moves three- undersurface color up the fuselage side camouflage is uncertain: it may be that dimensionally, it is apparent to an so that the shadow of the horizontal the prime objective was preservation of observer against the backgrounds of sky, tailplane would fall on its light ground — fabric. earth, and water. Each ground has or so they did in some instances. Unfor Uppersurface camouflage for French distinctly different characteristics, tunate for the camouflage artist, the aeroplanes employed two to five colors. respectively: varying brilliance, chang opacity of aeroplanes can silhouette Early machines, using the two-color ing color and texture, visual featureless them against a bright sky. So difficult is scheme, were dark green (30E3)* and ness. The best that a camouflager can do this problem to master that experiments dark earth (6E3)*. (See footnote.) The is to disguise the machine for the com were conducted using transparent French camouflage designers used both bination in which it most frequently materials instead of fabric cover! complementary and analogous color operates: sky and earth or sky and water. Having given some consideration to schemes. Some of their disruptive pat The factors of Shape and Silhouette the factors involved in the art of camou terns were composed of colors so nearly are related in such a way that colors flage, let us look at the efforts taken by of the same base that to term them chosen to break an outline must not lose some of the combatants of WWI. analogous would not be a misnomer: a their effect through distance-greying British efforts, with few exceptions, light green, a darker green, and an olive (their value must be sufficient far apart seem to have relied on the khakis and that was distinctly green. The same to remain effective), and those colors reys of their dopes and varnishes. As we might be done with shades and tints of must echo the background over which ave seen, the use of grey was as much browns. SPADS in particular, employed the machine operates so as to neber due to pigment shortages as could be a five-color scheme which seems to have reveal its presence bybeingsilhouetted. attributed to anything else. There are used sufficient aluminum in four of the Operation over a relatively featureless photographs of British aircraft with colors to make its presence apparent to sea calls for a solution where in the definite camouflage attempts, but all the eye. shape and silhouette are lost against the show penchant for shape-disruption NOTE: some of the Methuen refer background through the use of muled rather than true and full camouflage. ences given within this article have been colors that blend, or by broad shape This tendency is further evidenced by taken from MAP’s SCALE MODELS Extra breaking patterns that never reveal British use of, and experiments with, MODEL COLOR. It is not an indication more than a part of the aircraft at any dazzle painting. Not that dazzle painting of confidence level that these have been one time. is without novel effectiveness — even a shown with an asterisk (*) beside them Shine can be diminished, though photograph of some patterns will cause but, merely, recognition that these are never eliminated. A top coat of a flat the eyes to fight for focus! — but it the only reference sources given (others color, dope, or varnish will assist but seems that the British did not take up have quoted a reference number from spewing oil from the engine soon serious efforts with respect to aeroplane more than one source). Because the smooths the dulled surface and mocks camouflage until the "shadow pattern" METHUEN HANDBOOK OF COLOUR the effort. Weathering dulls the shiniest schemes of WWII. They did employ, has been printed (it is not color chips), of surfaces, however,a section of awing however, sound camouflage patterns on the chance that the copy in my hands that is dull when viewed from close the French SPADS and N.27's that they does not perfectly match another copy range will glint like a signal when seen used (and did not overpaint), they being elsewhere is a distinct possibility. Ink-lay from a distance: the dullness is relative. of French origin. variations occur in printing processes no Distance makes the surface relatively It is the French who explored and matter how carefully the sheets are smooth and reflective for it lacks, of employed the basics of what weconsider monitored with reflection-head densi necessity, the textural roughness that in this day to be camouflage. Their use of tometry. The Methuen book is still the thoroughly scatters light. aluminum as an overall color must be best available at the price. The interrelationship of Shape and considered as an "air camouflage" (it The Methuen references given for the Silhouette is also found with Silhouette certainly provided no invisibility when French five color scheme are as follows: and Shadow. Imitation of Nature called viewed against the ground), because it dark green (3F3)*, light green (3E4)*, for light undersurface color. Shadows was effective at high altitudes and under beige (5D5)* and dark brown (5E3)*. are less apparent when they fall on a certain lighting conditions. Whether this These colors were aluminum filled. The SEPTEMBER 1982 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 91 of a color; its influence would range Schlueter Free from: as if nothing, through a greyish- green influence, to a point where the Flight Models aluminum would become identifiably apparent. The fineness to which the presents 3 new powder was ground could have its own effect on the outcome. "PACIFIC ACE" There was a period, just prior to the employment of patterned camouflage, partial kits™^CoN- when some aircraft were delivered TAIN PRINTED WOOD AND COMPUTER (SPAD products) in what has been DRAWN PLANS) termed "light yellow." Hampered by the KIT NO, use of names for colors, precision PA-40-NEW 40" SPAN VERSION - ALSO FLIES GREAT ON .020 GAS. $6.65 evades me at the quote of a reference PA-30 "OLD TIMER" 30” SPAN-A GREAT P-30 CONTENDER. $4.70 number. Munsell show this name as a PA-20" OLD TIMER" 20" SPAN-SCHOOLYARD FLYING AT IT'S BEST $3.25 range from (T-4)A(4-5)! The use of "bis EXTRA PRINTED WOOD PER SET: PA-40.$3.90: PA-30,$2.60; PA-20.U45. cuit,” "mid-brown," "chartreuse,” and ADD »2.00 TO EACH KIT PRICE FOR POSTAGE. CA RESIDENTS ADD 6% TAX. so on, rile me. Consider "toast"; each 3508 POINSETTIA AVE, MANHATTAN BEACH, CALIFORNIA. 90266 member of my family would pick a different swatch in its identification. Their choices would mean, to me, bread W REPLICA OLD TIMERS that has been barely wounded: I think of FREE FLIGHT OR RUDDER ONLY R C partial kits ^ something burnt, a state confirmed by the presence of smoke. Over the years, I have countered a color name given with THE f-j II ,i llAcej. F rom 1936 the question, "Describe Caput Mor- The FLYINC QUAKER 'f-K K. irJ______tuum for me!" (A cruel streak?) It is 89" Span $21 50 L From 1937 ' f , j> because of such imprecision that the The QUAKER FLASH Munsell, Methuen, and Ostwald desig 67" Span $17.50 Q 51».95 nation systems came into being. What is Additional .020s 30“ Buzzard Bombshell. 511.95, Both are Rib. Tip. and Former Partial Kits. They 38” Playboy S r.. 512.95, 31" New Ruler. .513 95. feature Machine Cut and Sanded Parts. Full Size meant by the term "light yellow" when Jb’ Miss America. 512.95. J6" Clipper MK II. 511.95. Construction Plans (· Meqow's Plan), and Extens dealing with the overall color of such 36" Mercury. SU 95. 30.5“ Ranger. $13.95. 36" ive Building Notes. For Free Flight or R C. they Super Buccaneer. 519.95. 30" Request. $12.95 both meet all SAM FF and R C requirements French aeroplanes as employed it from 5" Twin Cyclone. $12.95. 36" Cavalier, $13.95. mid-7976 to Ί9Ί8 is an unknown. There •SFRirS SO" O lO TIMER Mi The LONG CABIN’ would be variation. Choose what satis AIR TRA ILS SPORTSTER. $39.95 4 Λ Λ Τ 78" Span. Classic Cabin. Plan Included POWERHOUSE. $39.95 fies your interpretation. Perhaps some $20.00 0Ί TO IS 1 CHANNfl K ( reader can provide a definitive answer At your Dealer or add 52.00 per order^ to the problem. · for UPS. Ca. Res* add 6« for Tax Free Flight. . . Continued from page 59 remaining color is black. All of these plane could cast its shade. finishes are semi-matt. Undersurfaces for French aeroplanes logically rudder seemed to be the cure. Reference should be made to photo are reported as being aluminum-filled But no. The fault was over elevation plus graphs to detemine the pattern for light yellow (4C3)* and a silvery-grey (for incidental direction instability. The application of these colors. There did which there is no Methuen reference resulting loop tendency itself was largely not seem to be any particular factory given). The aluminum powder of that the cause of the inconsistent direction of pattern although, it should be noted, the day did not produce the silvery color of the model’s pattern, aided by the vary application was done with considerable today’s product. Older readers will ing effect of the wing warp in the skill and good judgment. The one criti remember its lead-grey aluminum color changing attitude in the pitching plane cism that could apply is that there could — and the constant need to stir its heavy during the partial loop. Varying engine have been better use of light color in the particles. (This fact should be bourne in speed also had a marked effect on areas subject to cast shadow — under mind when painting a Nieuport 77, for direction, again because of the amount the upper wing, for one example. That example. The cowling of such aircraft of loop tendency produced, and the there was an awareness of the need to were painted a silver-grey: 30B3'.) It varying effect of wing warp at varying diminish a shadow can be seen in the use would depend upon the amount of speeds. The apparent occasional left of undersurface color where the tail- aluminum introduced for modification turn was really a left roll taking place with the model nearly on its back in the loop. Having cured the loop tendency and restored rudder response (though still critical) the model became tamer, but occasionally went completely off pat tern, usually in the form of a right hand spiral tendency. Again, the rudder, BARON 58 (As featured in June 79 Scale R/C Modeler) which could have conceivably been PLANS Micafilm is !/2 the blamed for a sharp right turn, was not to BEECHCRAFT BARON MOOEL 58: 2 V Scale-85 weight of any other blame. Eventually having decided that wingspan-1000 sq in. (3) 3'x6 sheets . SIS.00. BeechcraM Fin Insignia . S2.00 film covering . . . yet trimming could not cure this trouble, and BEECHCRAFT BONANZA A36: 2 * Scale - 8 6 7 times the strength! after discussion with Mike Caster and w ingspan-1300 sq in. (3) 3 x 6 '/? sheets $17.50. Vic jays, I increased the fin area. This All plans have easy to read isometric details and come No wonder so many rolled in a deluxe mailing tube Add S1 50 for postage took care of the secondary trouble of Overseas postage S8 00. Ala res add 6 °o sales tax top flyers are directional instability. Trimming to a switching over. BUD CADDELL reasonably consistent pattern became 1525 Badham Dr.. Dept. M. Birmingham. AL 35216 possible again, rudder adjustment now 205 822-4312 COVERITE DEALER INQUIRIES INVITED 420 Babylon Rd.. Horsham, PA I9044, USA producing normal results. But the pat tern itself had radically changed from 9 2 MODEL BUILDER the Oliver days. The number of turns in spiral had dropped by half and the climb became much steeper and faster. SEVERSKY! The need for the increased tailplane incidence was really obvious because of the increased speed of the model with extra power. But the need for a larger fin was not so obvious to me. I suppose, in theory, the fin should become pro portionally more effective with speed increase and therefore able to cope, which leads me to believe that another changed factor upsets the applecart. My considered guess is that the increased general buffeting and turbulence all around the model, and particularly the P-35 increased corkscrew effect of the slip PURSUIT OR stream on the front end of the model (especially the pylon), demand more stablizing work from the fin, either in S2 RACER terms of increased area or moment arm. 1/32 SCALE To summarize: to cope with the extra PLASTIC MODEL KIT power and lower all-up weight of a glow-engined bomb, I suggest the Designed during the 1930s, the P-35 was on ancestor of the famous P-47 Thunderbolt. This kit may be constructed as either the P-35 military pursuit or o Bendix racer. following modifications: KIT FEATURES: TWO TYPES OF WHEELS (hard and flexible tires) · DETAILED INTERIOR 7. To cure loop tendency (a) rig the • TWO TYPES OF DECALS · TWO TYPES OF CANOPIES model close to zero-zero and push back the CC accordingly for glide trim, (b) Send $1 for complete illustrated catalog. DEPT. MB Increase tail moment arm or tailplane 18Ί PAWNEE ST., SAN MARCOS, CALIFORNIA 92069 area. Either will assist in also moving CC back, (c) Lower pylon height. An inci dental benefit of this may be the smaller Eliminates GLITCH problems associated with long servo leads. pylon area offered to the corkscrew effect of slipstream plus the restoration • Eliminates need for voltage robbing chokes and other devices with of the frontal side area/CC relationship leads over 15" long ^ _ which was changed by moving the CC • Modern CMOS IC technology rearwards. • Uses less than 0.5 milliamps at 4,8 volts 2. To restore directional stability: STOP • Power lines are capacitor filtered Increase fin unless moment arm has • Available in 4 versions with connector installed: been increased. Both maybe necessary. 510.95- Single Channel, single servo drive (Single) GS-1 3. To ensure good power-on/glide 512.95- Single Channel, two servo drive (Wye) GS-1 V ^ transition: Incorporate wing warp and/ 514.95- Two Channel, two independent servo drive (Twin) GS-2 or use auto rudder. EMS S17.95 - Two Channel, two servos per channel drive (Twin Wye) GS-2Y 4. Decrease dihedral. By rigging close iltetBOSiC VOM.i SWCM*. • Overall lead length is approximately 6 to 8" to, or on zero-zero, looping is unlikely, • Modeler must furnish own longer extensions as required therefore turn is less necessary as an S n e rifu Radio S1.00 Shipping and Handling on Pre-Paid orders, add anti-loop device as in the old type spiral μ ’ 6% lor California residents. Mastercharge and Visa. climb. Because less turning is involved in 6175 PALO ALTO DR., ANAHEIM, CALIF. 92807 (714) 637-2161 the new pattern, large dihedral and pylon area are no longer necessary, which does away with their attendant hot TD .15. I scaled up the fin area increase in fin area. He concluded that a most undesirable by-products. incorrectly and used a fin the size I’d tendency to right sprial dive was caused A steeper, straighter climb is thereby normally use on a 750 sq. in. C ship. The by too little fin area; too much area gave achieved which is less wasteful of dis model was outstandingly easy to trim, a tendency to loop. (A few issues back, tance flown under power, giving in and it took me six months to notice the Pete Buskell suggested that anothersign creased height. The chief drawback to too-large rudder. My next experience of too little area was an inability to fly a this pattern is the poor climb/glide was to try and trim out the C model with consistent pattern in windy weather.) transition often produced. Wash-in in the same size rudder. Power pattern was So, it would appear that, when trying out the inner panel of the starboard wing inconsistent, and it finally spiraled in to a new high-powered design, it would be (orthodox wing warp on a model which the right. I finally came to the con best to err on the side of too large a fin flies right-right) will usually cure this clusion that this was the result of too than too little, then to reduce area by problem, as well as providing a bonus in little fin area, and have been using the small amounts until instability is noticed. the form of extra insurance against the larger proportions ever since. There A lot of dihedral makes the amount of loop tendency gremlin on the climb. have been hints as to the importance of fin area less critical, w hile reducing Wing warp also allows safer use of right sufficient fin area for high-powered dihedral effectively makes for a larger rudder to achieve the desired right hand models in published material for the fin. patttern. Of course, an auto-rudder is past 20 years, but many designs are SHOP TIPS: SPRAY CEMENTS the most effective method of ensuring a operating with marginal fin area, par I’ve alluded to their usefulness before, good climb/glide transmission: I advise ticularly with today's hotter engines. but I though this month that it would both wing warp (go easy with it) and So HOW do you determine the be beneficial to describe the multitude auto rudder. proper amount of fin area? Required of uses to which you can put a can of George’s experiences parallel my reading on the subject is Frank Zaic’s spray cement. (Different folks have a own, particularly when he speaks about paper in the 1975 NFFS Symposium, on variety of preferences as to the exact the need to increase fin area as the the development of his X-18 design. type to use: Bill and Bob Hunter swear power is increased. I first became aware Frank found that with high power, this by 3M #77, Wayne Drake and I used of this with my first Ringo AB ship, which design would show signs of directional Spra-mount, while Ed Hopkins, of the was FAI size and weighed 17 oz. with a instability, which was corrected with an San Valeers, recommends Scotch Photo- SEPTEMBER 1982 WHEN CONTACTING ADVERTISERS. TELL 'EM MODEL BUILDER SENT YOU! 93 SCHOOL DAYS REVISITED You might remember my description of the successful flying experiences my Physical Science class had w ith the F L Y ELMTRIC Twiggy models at the beginning of the school year. Well, to combat the end-of- school doldrums, I promised the class VL-101 Electric propulsion system that if they finished all their class assign shown— using Hytork 48 motor and ments early enough, we’d build some planetary gear box, SJ-3 switch & more models at the end of the year. charging jack, and B-33L fast charge Most of the class took me up on the ni-cad flight battery— total weight offer, so they spent the last week of 2% 02.— will power models 25 to school completing a few of Frank Zaic's 50” wingspan weighing up to 10 oz. X-12 and X-18 designs. Our success rate Send 50c for latest catalog showing with these models was even higher than full line equipment & accessories. V L PRODUCTS in September. . . every one of them flew Hobby dealers send for information. Division of vista Labs and we lost four models in thermals! 7871 Alabama Ava., No. 16 These are truly the finest beginner’s Canoga Park, California 91304 designs I've ever seen. The X-18 is particularly impressive to the kids . . . it climbs like an FAI Power model (about a 10 second run), and really gets high. YES-SIR, YE8-8IR, THREE BAGS FULL! Building is very simple and straight forward, and the all-sheet construction 4 - ™ Β > β < $ A VAluABLE fi/o yu makes repairs easy. Frank is not pro ducing these kits any longer, which is a shame, but he hopes to get a major kit manufacturer interested in continuing ΠΠ the line. I hope somebody is able to pick up the ball .. . wide availability of these 3 ΛΛΊΕ. NUr*ie>£R. or Pa /cÆ / kits would do a lot to insure the future of WALT MOONEY NOW OFFERS 4 b a GS OF PEANUT SCALE PLANS free flight. (Readers . . . get after your favorite kit manufacturer! wen) a l l w e l l TESTED DESIGNS, a t O N L Y tsoo EACH On another note, you might be inter EACH BAG FEATURES FOURTEEN p e a n u t p l a n s , ested in an account of our annual ONE OTHER, PLUS PHOTOS ANO INFORMATION Physics Olympics competition among SENO *1.00 FOR COMPLETE LISTING AND SAMPLE PLAN TO: Portland-area high schools. One of the events featured (along with a quiz show, WALT MOONEY, 2BI2 CABRlLLO MESA OR musical coke bottles, a slow bicycle race, SAN OlEGO, CALIFORNIA «2123 and water balloon launching) is a paper airplane event. Last year, we didn’t do well in the event (a blow to my ego), but hold balsa sheets down to the board this year, we had the technology and VINTAGE R-C FLANS while cutting out tapered spars from turned this into a rout. John Cooney did sheet. I suspect it could also be used to a little research beforehand, and started hold a couple of sheets of wood to trying to make a paper airplane out of his gether while cutting out duplicate dad’s condenser paper. He noticed how CONSOLIDATED fuselage sides. long it took a scrap of the stuff to fall to PBY 5 A "CATALINA” And then there’s the Satellite City 9 FT. WING SPAN the ground, and came up with his ALL RIBS 8 FULL FORMERS SHOWN ON PLANS 11 almost patented idea for building model revolutionary design: a 1 inch x 2 inch PLASTIC FNG.COWLS 1 9 .9 0 PR. frameworks without pins. Spray the back rectangle of condenser paper. Launch c l e a r gun b l is t e r s $ 6 .6 0 pr side of your plans with cement, let dry a technique was to place in the palm of 4 LARGE PLAN s h e e t s — Plans $16.95 minute, then stick down to your build 6 f t . WING SPAN MODEL PBY-5A ing board. Next, do the same to one side e n g in e c o w ls s 6.50 PR. Plans $ 12.95 of a sheet of waxed paper, and stick it NFFS MEMBERSHIP AND RENEWAL APPLICATION GUN BLISTERS J4.S0PR ADD Í2 .5 0 POSTAGE down on top of the plans. Finally, give M a il to: Make checks payable CATALOG-OVER 50 PLANS 11 00 OEALERS WRITE the other side of the wax paper (the top NFFS to the _____ κτν ____ 707 2nd Street National Free Flight Society W O R L D W ID E one, facing you) a heathly shot of spray Davis. CA 95616 cement and let it dry. This will give a nice Subscription rates include annual fee of S 50 for membership SID MORGAN in the National Free Flight Society. The balance of the fee in 13157 ORMOND , BELLEVILLE , M ICH.48III U.SA. tacky surface which will hold leading each category is for Subscription to FREE FLIGHT, the NFFS and trailing edges, spars and ribs in place Digest Subscriptions are not available without membership mount. They probably all work equally while you glue the framework together. MEMBERSHIP FEES ANO SUBSCRIPTION RATES f t end 2 yr I well, so your choice is likely to be based I’ve tried this system, and it really works! Age 19 A over 1 yr m o o 94 MODEL BUILDER Ace R/C, Inc...... 65 INDEX TO ADVERTISERS R/C Bees-Model Builder Contest .. 100 Aircraft Spruce & Specialty Co...... 84 RAM Radio Controlled Models...... 98 American R/C Helicopters...... 71 Rolley Model Products...... 72 Associated Electrics...... 75 Indoor Model Supply ...... 89 Roush Mfg. Co...... 82 Astro F light...... 70 J.V.S. Products...... 86 Satellite C ity ...... 4 Bavarian Precision Products...... 73 K & B Manufacturing...... 78 Schlueter Free Flight Models...... 92 Beehive R/C Model Aircraft Co...... 70 Kraft Systems. In c ...... Cover 2 Sig Mfg. Co.. Inc...... 66.67 Byron Originals ...... 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Commercial rate is 40 cents per word, with a minimum of $5.00. No advertising agency LIGHTWEIGHT FIBERGLASS CLOTH - discounts allowed. Good for repair, parachutes, etc 10 sq ft A ll ads are payable with order, and may be for any consecutive insertion period specified. sample. $3.00 Send to Hobby Cloth, 1121 Name and address free, phone number counts as two words. Send ad and payment to: Randolph. Thomasville. NC 27360 MODEL BUILDER, Classified Ads, Box 335, 621 West 19th St., Costa Mesa. CA 92627. CLEVELAND'S 1400 AUTHENTIC, prototype practice scale (lying model plans. 1 /32-1 /4 Twelve full pages of ready-built models plus OLDTIMER MODELS — Everything for the size Pictorial catalog including prices $1 50 used equipment bargains in the last issue of rubber modeler Over 300 plans, balsa, tissue, Price list alone 60C or SASE and 25C "Hobby Swap News," Buy-Sell-Trade, your condenser paper, absolite film, rubber and Cleveland Models. 10307M1 Detroit. Cleve first ad free (35 words max. B&W photo $2 lots more. Send $1 for 9 page catalog, refund land. OH 44102 extra) with subscription: $ 10/yr. (10 issues). able with first order. P.O, Box 913. West $19/2 yr„ $27/3 yr Add $3/yr for 1st class minster, CA 92683 HELP"1 New mfg needs supplier/technical postage, (required for Canada & Mexico). MC and purchasing advise on pre-printed and & Visa accepted Hobby Swap News. Dept WANTED — OLD MODEL ignition engines pre-cut balsa and foam Also balsa/foam FLC-32, P O Box 834. Santa Maria. CA cars etc Paying top dollar BillSimpson 7413 laminates for small 12" to 18" wingspan hand 93456 Via Lorado Rancho Palos Verdes. CA 90274 thrown and catapult gliders Marathon Mkting. (213l 377-3532 P.O. Box 997 Ocala. Fl 32678 RET has 'urn! The Trail Blazers — full size 3 views — and others: Those Flying Aces WANTED A J Interceptor. Hornet, and small GOLDWING canard pusher p-nut ultralight. models that are classics SASE for list RET hand launch Interceptors: originals or repli 2-minute flights; plans $1 00. SASE for list; Plan Service. P O Box 7893. Midfield, AL cas. top price. L J.B . P.O Box 997. Ocala. FL David Aronstein, 50 Pasture Lane. Pough 35228 32678 keepsie. NY 12603. the hand, and blow upwards against it, so it fluttered to the ground. From GOLDEN STATE CLASSIC shoulder height, flights of over8seconds SCALE ’82 could be consistently attained, which is Grand Champion Prize sponsored by CANNON ELECTRONICS about double the duration of a typical September 4, 5, Saugus, California folded paper airplane. He equipped our whole team with this design, and our Sport · Giant success in the first round with them Micro · Team brought about a chorus of boos, hisses (Μ ίσο Max Displ .15 cu. In ) and protests from the less creative schools. Since the event rules didn’t define what was meant by the term Trophies to Third Place in Each Event "paper airplane” , our victory stood. By Valuable Prizes the second round, we noticed some other schools ripping their planes to Great Field · Asphalt Runways shreds and trying to fly the scraps in the Grass · Free Camping same manner, but writing paper had too high a wing loading. One chap even Accommodations for out-of-towners burned his airplane, then tried to fly the at club members homes ashes, but blew it apart on launch. can be arranged. The moral to this is that any set of competition rules has loopholes, and it Information package upon request: only takes one model builder to find and exploit them. · Write CANYON CROSSWINDS P.O. Box 55694 Canyon Country, California 91351 SEPTEMBER 1982 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 95 FULL SIZE PLANS SERVICE No. 4821 LOCKHEED VEGA $7.50 No. 1281-O.T. FOLLY II $4.00 Exact 1-1/4" R/C scale model of Jimmie Beautiful aerodynamic lines on this 6-ft. gas job. Pic in July '37 MAN. Rod Doyl& Including reprint of construction article Mattern's Vega, 50" span. Walt Musciano. (if any) ______No. 4822 AIR XX "PYLONER" $1.50 No. 11811 WACO TAPERWING $17.95 AIR XX (20" Antique Indoor Rubber) of Sensational 1 /4-scale R/C model of Bob No. 9821 SAND FLI $4.00 typica l O .T . gas m odel. B y Ken Johnson. Lyjack's Waco. 2.5-3.5 eng. Larry Scott. Easy built, .049 powered flying boat-like 2-ch. R/C sport biplane. By Bob Banka. No. 4823 SCHNIEDAIR $2.50 No. 1181-0.T. HALF-PINT $2.50 Composite of typical Schneider Cup rac Tiny (24-3/4” span) pylon free flight gas No. 9822 ELECTRIC BRIGADIER $4.00 er, fo r CO 2 or rubber. By Walt Winberg. model for Atom or .020. Louis Garami. Early post WW-II Berkeley kit design re turns as 05 electric R/C. Mitch Poling. No. 482-0.T. TIGER SHARK $6.00 No. 10811 HEATH PARASOL $7.50 Enlarged, R/C version of nostalgic Victor Lightweight quarter-scale for .60 power. No. 9823 DAPHNE $2.00 Stanzel G liner, 61" span. Harold Lanser. Sharp little 20" span rubber scale model Span 94", two-piece wing. Bob Kitson. of a cabin homebuilt. By Perry Peterson. No. 3821 GREAT LAKES 2T-1E $17.95 No. 10812 NAVY PT BOAT $3.00 One-fourth R/C scale model of popular Built on Dynamic's 1/2" scale. 39" fiber No. 9824 THE PAWN $2.50 Classic Era bipe. 3 sheets. Frank Comyns. Con testproven, foam wing Half-A con glass hull. Gas or electric. By Art Bauer. trol line combat machine. By Paul Smith. No. 3822 SIMPLE SIMON $3.50 No. 10813 BUTTERFLY ONE $1.00 No. 982-0.T. ARROW $4.50 Really simple 1/2A sport R/C for 2-4 ch. This little rubber powered ornithopter Cl. A '40 Nats winner and record setter. Uses Ace foam wings. By Frank Roales. looks like a big butterfly. Ken Johnson. Pylon. Detailed instructions. Bill Gibson. No. 1081 -C.P. N. AMERICAN B-25 $4.00 No. 3823 PEANUT HOT CANARY $200 Miniature Aircraft Corp. 1/2"-scale kit No. 8821 BOTHORNE $1.50 Sharp staggerwing biplane racer, big for a plans. All printwood parts duplicated. Tailless rubber ship for Boston Cabin or Peanut but meets rules. By Bob Sweitzer Hawthorne Flying Wing rules. B.Wainfan. No. 1081-O.T. OLD SQUARE SIDES $4.50 Very realistic sport cabin from July '40 No. 882-0.T. SNOW WHITE $18.95 No. 3824 1912 BLACKBURN $4.00 Air Trails. Nice for R/C. John Sprague. Joe Raspante's famed 8 ft. span Beauty Free flight 1-1/2 inch scale model of fa winner. Plans direct from original model. mous antique monoplane. By Sid Miller. No. 9811 SCALE EDO FLOATS $3.50. Designed (or Sig Cub, these floats fit any No. 7821 MONARCH $5.00 No. 382 O.T TWIN PUSHER $3.50 two-inch scale model. By George Wilson. R/C 6 ft. span swept, flying wing glider Record setting rubber ship from Aug. '36 with fuselage, fin/rudder. By Bill Young. Model Aircraft Builder. Ralph Kummer. No. 9812 STINSON VOYAGER $250 One-inch scale rubber model of classic No. 7822 WHITEHEAD NO. 21 $4.00 No. 2821 ACRO SPORTSTER 40 $6.00 design. Span 34". A.P. 'Speed' Wilson. Possible pre-Wright Bros, flyer in rubber Sport/pattern low winger, open cockpit, F/F, 40" span. It flies! By Ken Johnson. tail dragger, .40 powered. Peter Neuer. No. 981-0.T. BOOMER BUS $4.00 Another Henry Struck classic, from Feb. No. 2822 MESSERSCHMITT M33 $200 No. 782-C.P. J-3 CUB $2.00 1941 Air Trails. For .19 to .29 ignition. An official 1942 Piper Aircraft Corp. Semi-scale, "bathtub" style, CO 2 pow er plan for 25" span rubber scale model. ed sport free flight. By Jack Headley. No. 8811 MINI BIRD $4.00 Two-meter version of Dave Thornburg's No. 782-0.T. MOFFETT WINNER $3.50 No. 282-0.T. VIRGINIA CHAMP $5.00 well known Bird of Time. Mark Smith. Roy Nelder's most functionally beautiful Little-known, but sharp Class C pylon, 1940 winner, from Nov. 1940 A ir Trails. April '40 F.A., 60" span. By Bob Little. No. 881-C.P. SEVERSKY P-35 $4.00 Miniature Aircraft Corp. 3/4"-scale kit No. 6821 DUCKLING $3.50 No. 1821 Model Builder RAVEN $5.75 plans. All printwood parts duplicated. All sheet wood R/C flying boat for mini Latest in a long line of tailless R/C sail radio and .02-.049 engine. Ken Willard. planes, span 110", 2-ch. By Dave Jones. Minimum of $5.00 on credit card orders. No. 6822 ASCENDER $4.00 No. 182-C.P. SUPER G SHARK $3.00 Complete list of over 400 plans. SOt Smooth flying, trike geared, tractor can An historic two-line controlled model of NEW ORDERING INSTRUCTIONS ard. Ace foam wings, .15-.25. Skip Ruff. classic lines; one of many by Vic Stanzel. Price includes 3rd or 4th Class mail. For air No. 682-O.T. THE HERALD S4.50 No. 182-0.T. HI-HO $3.50 mail or First Class (Priority) in U.S., add Pod/boom, twin ruddered. Class B pylon A 1940 convertible stick/Wakef ield; uses 25% of total order. For Overseas Airmail (in gassie from May 1941 AT. Gene Chaille. demountable cabin/pod. By Ed Lidgard. cludes Canada and Mexico), add 50% of to tal order. Remit by International Moner Or No. 12811 XINGU $4.00 No. 5821 BUCKER JUNGMAN $15.75 der or U.S. funds drawn on a U.S. bank on Aerobatic quarter-scale model for geared High performance F3B type sailplane of Overseas orders. Postage paid for APO and 90, 1.2 direct, or Quadra. By Gene Pond. contemporary construction. Ken Stuhr. FPO orders. Master Card or VISA accepted. Include card number, expiration date, and No. 5822 CRYSTAL AMANITA $3.00 Να 12812 A.J. INTERCEPTOR S1.00 signature. A ll sheet bass and balsaw ood 1/2 A sport Replica of the famous Jim Walker folding C/L for all skill levels. By Tyrone Parker. wing catapult glider. By Dave Thornburg. CALIFORNIA RESIDENTS ADD 6% TAX. MODEL BUILDER PLANS SERVICE No. 582-0.T. CONTEST WINNER $3.00 No. 12813 SUNDAY FLYER $2.50 High climbing diamond fuselage rubber Easy beginner's 1/2A sport F/F. One-day 621 West 19th. St.. Box 335 ship from '38 Air Trails. Henry Struck. assembly. Ace foam wings. Ken Willard. COSTA MESA. CA 92627 0132 custom fitted, this is not a sales message with less than 2 dB attenuation while Workbench. Continued from page 6 as such for our offices. .. though we will having noise protection attenuation of be happy to fit these devices on indi up to 60 dB. done, it cannot be undone. viduals who can make it to our "In shirtsleeve English, this means that "Now the good news. I’ve recently Cheyenne, Laramie, or Casper offices. you can have complete protection from discovered as perfect a preventive solu But for those who don't wish to make a the noise of the nastiest ripping, snarling tion to this very real, very ugly problem trip to Wyoming for a set of earplugs, .40 pylon or boat engine, while experi as is presently likely to exist: an earplug most any hearing aid specialist's office encing no loss of normal conversational vent/valve which converts extremely can handle it... you'll find them in the understanding. dangerous amounts of sound energy yellow pages. "I emphasize that these devices are into small, harmless amounts of heat "With the custom-fitted version of the much more effective than "mouse ears" energy! earplugs.. . which is what I recommend (because they always fit, are comfortable " Because these earplugs must be . . . one can hear normal conversation over long periods of wear, have greater 96 MODEL BUILDER R v MODEL c BUILDER 's 40 BEST SELLERS! SEE PAGE 100 FOR ORDERING INSTRUCTIONS. COMPLETE PLANS LIST SENT WITH EACH ORDER. No. 6781 LOCKHEED P 38L $12.00 No. 7724 TRAVELAIR '2000' R/C Spon Scale, balsa and ply const . a Two mch full scale Classic R/C biplane trophy winner, big. 8' span. A rt Johnson No. 2761 DRAGONFLY $4.50 Proven flier, 60 power Bv Bill Northrop No. 3771 WACO UPF 7 S5.00 R/C funship, looks like giant rubber stick No. 7721 FAIRCHILD 51 $3.50 Stand-oil R/C scale 11 8"^Γ) ol one of the model Superb trainer Bv Tev Newman. One inch scale Classic for R/C. also F/F prettiest Waco biplanes. Span 54V R Steely Να 8741 WOODY PUSHER $4.00 gas or rubber By H urst Bowers No. 12711 CURTISS WRIGHT JR. $4.50 Easy to build & fly semi-scale R/C home- No. 879-C.P. CURTISS F-11C-4 $4.00 built. like C.W. Jr. 09-.15. Chris Moes. Reprint of Miniature Aircraft Corp. plans No. 9781 GREAT LAKES TRAINER $4.00 plus ribs and bulkheads from printwood Sport scale biplane for 3-4 channels and .19 engines, 40” span. By Bill Northrop. No. 4801 BRUSHFIRE $6.00 Contemporary design being used by sev eral top pattern fliers By Ken Bonnema. No. 2801 T IPO RARE $6.50 Top pattern ship in 1979. Flown by Dave Brown at World Champs. Dick Hanson. No. 8723 TAYLORCRAFT. F/F S150 No. 6771 GIPSY MOTH S12.00 Rubber powered. 24-inch scale seaplane Exact quarter-scale (7-1/2 It. span) R/C An excellent flyer By Walt Mooney ol famous D.H. bipe. By Bill Northrop. No. 579-O.T. TAYLORCRAFT S12.00 No. 1722 PUSS MOTH $4.00 Quarter-scale in 1941! Famous 9-foot de Chet Lanros famous rubber F/F scale sign kitted by Miniature Aircraft Corp Puss Moth returns1 By Hal Cover No. 10753 SUPER PUP S3.00 No. 68GC.P. GRUMMAN F3F-1 $4.00 Profile C/L stunt ship tor .29 to 36 pow Reprint ol Miniature Aircraft Corp. plans er, 42" span. Easy-built. Mike Parenteau plus ribs and bulkheads from printwood. No. 8781 R/C VELIE MONOCOUPE S9. NO 4742 CESSNA AW $3.50 Light-weight 1/4-scale for belt reduction Jumbo scale rubber powered model of a electric power, 90" span. Bob Boucher 1928 classic. Span 48” . By Jim Adams No. 4751 R/C AUTOGYRO $4.00 Semi-scale twin rotor R/C autogyro for 35 engines. Very stable. By Skip Ruff No. 9792 CRICKET $3.00 Balsa profile luse. Ace foam wing 1/2A q u ic k ie to r 1 o r 2-ct> ra d io J. Headley. No. Π74-Ο.Τ. LANZO STICK $3.50 Rubber stick winner 40 Nats. Span ΛΆ’. . .iSaW. ------LU- Still good in Unlim By Phil Bernhardt. n o . 1731 SPROOSE GOOSE 55.00 EAA type R/C spon biplane, mostly No. 574 O.T. The T-D COUPE S5.00 spruce, lor 60 engines. By Bill Northrop Classic high wing 1936 ’C cabin gas job. Span 64". Redrawn by Phil Bernhardt. No. 11781 TRAVEL AIR D4D $8.00 No. 773-OT LANZO 8' GAS MODEL $6.00 A ccurate 2-mch R /C scale m odel o f fa m ous Golden Era biplane. By Bill Seldler. Chet Lanro's famous "Record Breaker" Two large plan sheets By Phil Sernhardt. No. 11731 BIG JOHN the FIRST $7.50 No. 874 O.T. POWERHOUSE $5.00 Modified prototype of editor's notorious Taibi's famous design for Forster 99 ign monster R/C biplane. By 8ill Northrop. No. 1080-C.P. STINSON RELIANT $4.00 Great for R/C O. T. By Phil Bernhardt A 3/4" scale model Irom 1934 Ideal kit. No. 4733 PEA POD $4.50 Excellent plans for F/F rubber. R/C, etc. A 36" long R/C sailboat easily made ot No. 1723 WHITE TRASH S4.00 1/8” Luan mahogany Clever sail control A proven, trophy wmntng R/C sailplane Full sire patterns By Tom Protheroe with 7 and 10 It span By Rick Walters No. 5761 ALBATROS $5.50 No. 7801 APPRENTICE S5.00 R/C sport scale post-war German light Continually popular genuine R/C trainer plane Span 74", .36 eng. By Jeff Breece for ,19-.35eng., 72” span. Bill Northrop. No. 176 O.T. KORDA WAKEFIELD $2.50 .___ The classic of all rubber powered comp No. 174-OT EHLING '37 GAS JOB $5.00 etition free flights. By Phil Bernhardt Frank Ehling's 8 ft. span 1937 gas model. Still winning! Drawn by Phil Bernhardt. No. 477 O.T. CLOUD CHASER S1.50 This 30" span stick |ob from 1938 MAN is OT, FF trainer. Unlim Bruno Marchi. No. 175 O.T. FLYING QUAKER S5 00 No. 12792 EXCALIBER II S5.00 First gas m odel k it bv Megow. 1937. R/C tunnel-hull outboard constructed of Span 7 ft. Redrawn by Phil Bernhardt. plywood, for K&B .21. Bv Jerry Dunlap. No. 9783 R/C STEAM LAUNCH $6.00 No. 12741 85' HARBOR TUG $8.00 Natural finish mahogany planked 40" OA Complete plans (3 sheets) for R/C tug. "African Queen" type Kilburn Adams. All wood. 37" LOA. By Francis Smith. you may be in for a pleasant surprise. M A D I O C mCONTROLLED - Last weekend, I was installing a set of INSURANCE FROM Malibu garden lights on our back patio. These are the low-voltage (12 V.D.C.) YOU'RE IN GOOD HANDS WITH A ... l n d m ODELS INC. lights that operate off of an outside 4736 N MILWAUKEE AVE CHICAGO IL 60630 USA transformer that usually includes an on- BATTERY BACKER #RE0 09. Senses low or Intermittent voltage from the primary RX battery and switches to off clock timer. A heavy exterior grade, a 100 milliamp or larger backup battery, then sounds an audio alarm Eliminates the most common cause two-wire cable is screwed to contacts in of radio failure Backup battery and switch harness are required. 1%"x V x ’/«"plus beeper H 'x V x '/»" the transformer box and then strung out Total weight 1 oz $39.95. through the garden or whatever. At OUAL SERVO SETTER AREO 10. Senses loss of radio signal or low battery and moves TWO servos to a pre selected spots, a 12-volt sealed beam selected position Connectors required. 1'A" x I'A " x Weight 1 oz. $39.95 AU0I0 BATTERY ALARM AREO 11. Can be easily installed in either the RX (4.8 volt) or TX (9.6 volt) system lamp, over which your choice of colored Senses low battery voltage and sounds an audio alarm. %" x %* x ’/<" plus beeper V>" x 5A" x '/ι". Total lenses are attached, is clamped onto the weight .5 oz $19.95 cable, making spiked contact with the GO BOX AREO 12. Superbright red and green LED’s tell you whether your RX (4.8 volt) and TX (9.6 volt) insulated wire inside, to light the lamps. batteries are ready to "GO" Connectors required. 3" x 2Ά" x '/ι". $24.95 We wanted to put three lights in each of AUDIO FLIGHT TIMER AREO 13. Dependable, solid state, can be set from 37 seconds to 20 minutes Flick a switch to start and stop. 9 volt battery required 3" x 2’/·" x Ά". $24.95 two planting areas which happen to be IF UNAVAILABLE LOCALLY. A00 $1.00 FOR DIRECT ORDER. NO C.O.D. SENO SJLS.E. FOR INFO. on either side of an 8-foot sliding glass door opening to the patio. incentive to purchase this very effective, Great. . . the cable has to go across the very inexpensive protection, the hearing 8-foot opening to get from one planter e aids that you will eventually need if you to the other! Aha . . . enter Hot Stuff. obby H o r n don’t protect your ears sell for $450-$795 After stringing out the cable and clamp per ear. ing on the lights, I tucked the cable, WE ARE PLEASED TO ANNOUNCE the acquisition of the Hal Osborne Plans Service. Included are "Hearing aids are marvelous little about 1/8x3/8 in size, tightly up against over MO exceptionally high quality Scale plans l devices. I and most specialists perform the aluminum threshold, which is about drawings. Complete list is SOC PP or see below. COMING SOON We expect to have a Partial Kit daily miracles in fitting them... but you 3/16 higher than the terrazzo patio step, of the Snow White Antique Gas Model ( 1938) will never hear as well with an aid as if and went along it with regular Hot Stuff. available in the near future. It is to be pro duced by Cene Wallock of P & W Model Service. you’d protected your natural hearing. Voila! The cable is solidly stuck down to Price and Availability date not known at this "And note this: even if you already the aluminum and the terrazzo, looking time. Watch this ad for inform ation. OLD TIMER KITS: Partial and Full Kits. have a hearing loss sufficient to warrant for all the world like a strip of insulation. P t W Semi Kits·-Cut Parts Kits- -Machine Cut. 1939 Comet Z ipper. 54" Spon (plan in cl price) $33. UU use of a hearing aid, the damage to your It won't come loose to trip anyone, 1938 Trenton T e rro r. 72" (plan in cl price) $20.00 hearing continues if you don’t protect unless it is deliberately pried away with a 1936 Berkeley Buccaneer. 84” (plan incl price) $25.50 Othor PåW Semi Kits available (Plan incl. Price): what you have left. knife or screwdriver. Dumb luck and 1938 Comet C lipper MK I. $19.25; 1937 Dallaire "That’s my soapbox for this year, Bill. modern materials wins another one! Sportstor. $31.00; 1939 Scientific Mercury, $28.00; 1935 Miss America. $31.50; 1941 Playboy J r..$17.00. Thanks for any exposure you can give VOTE FOR MARY 1941 Playboy S r.. 22.25; 1938 Powerhouse. $25.00; my preaching. Politics and modeling don't ordinarily 1940 Ranger. $18.00; 1940 Comet Suilplune. $50.50; 1940 So Long. $17.50; 1939 Kordu Wakefield. $10.75 Sincerely, mix too well, but there’s always an MIDWAY MODEL CO. Full and Purtlal Kits: Ed Turner” exception. Phil McCary, who builds 1941 A ir Trails S portster. 50" Full Kit $35.96 1938 Powerhouue. 50" Spun Full K it $35.96 THORNBURG AT EASE some of the neatest and best flying old 1936 Flying Q uaker, 84". Semi Kit ( plan in cl) $21.50 1937 Quaker Fluuh. 67". Semi Kit (plan incl) $17.50 You won’t find Dave Thornburg’s timer rubber ships you just about ever 1937 Long Cabin, 78". Semi K it (plan in c l) $20.00 “Thornburg at Large" in this issue, and saw, sent us one of those mailing pieces 1940 Comet Suilplune, 36” for .020 engines $14.95 1935 Mias America. 36" for .020 engines $12.95 probably won't for a few issues hence. we’re all pretty familiar with when Other Mfg. Old Timer Kits- Full Ktts. Dave is taking what we hope is only a election time comes around. It contains 1941 Playboy Senior (T y ro ). 80" Span $49.95 1938 Boy Ridge Mike (T y ro ), 48" S p a m .049) $28.95 short leave of absence, and ne promises all of the normal appeals for your 1939 Korda Wakefield (4 K 'e ). 44" Rubber $16.50 to come back. Right now, he’s working support, but then Phil added something NEW Playboy Sr. 67" for geured Electric 05’s. Special introductory Price (Reg $44.95)-- $30.00 hard to complete the construction of his to the bottom of the letter in his own LEISURE 05 Geared Sys ($100.00) Special****$75.00 home, most of which he is doing himself handwriting that prompted us to bring ASTRO 075 XL Sys w/reducer!Reg $110) Sp**$80.00 ASTRO AC/DC Charger! $69.95)Special****#**$47 50 (says he's not using much balsa or the matter to your attention. LEISURE DIGITAL Charger ( $10. 00)Speciul·* $75.00 cyanoacrylate on the job). "Dear Bill, SHIPPING & HANDLING 50 Page CATALOGUE Up to $8.00 add $1.50. and Plans list: $2.00 FORREY REPLACES FOGEL When elected to Congress, Mary $8.01 to $20.00 add $2.25. (A copy will be sent Depending on your preference of (Gojack) will attempt to have federal $20.01 to $45.00 add $3.00. free--when requested $45.01 to $70.00 add $3.50. with an order. 1 sequence, you may or may not yet have land dedicated in perpetuity to all forms and over $70.00 add $4.00. HOBBY HORN read this month’s R/C Soaring column. of modeling activity. Mary Gojack needs CA Addressee» add 6% tax. ••hobby specialties*· Send MO. Visa/MC( f t Exp) P.0. Box 300*4 When you do, you will find that Larry the support of all modelers. or Check (allow up to 30 Seal Beach. Ca 90740 days for CK clearance.) (714) 894 6223 |Bcst Fogel is bidding farewell. Having taken Best, COD- Exact Charges plus mornings or recordcr- on additional work to the presidency of Phil McCary” $1.50 Hdl (Cash Only) activatcs on $ rings.) his own company, Decision Science, he Well, that’s good enough for us. OK, will no longer have the time to accumu Nevada modelers, spread the word to noise attenuation, and need not be late material and produce his monthly your voting friends and neighbors, and removed lor conversation) and they will soaring column. get Mary Gojack into the U.S. Congress! likely save you the eventual purchase of Reporting for duty in Larry’s Place is (Equal space offered to any other poli hearing aids. Bill Forrey, who provided the fine text tical figures who have something to “ The earplugs themselves are called and photos for the Two Meter World offer the modeling fraternity). "Noise Braker" and are custom made for Cup story in our June, '82 issue. Bill has IFMAR INTERNATS hearing aid specialists by Hocks Labora much experience as a club newsletter The IFMAR (pronounced IF-MAR) or tories, P.O. Box 14400, Portland, OR editor, is an excellent photographer, International Federation of Model Auto 97214. and knows his way around the R/C Racing is finalizing its plans for the first "Our offices sell these earplugs for soaring arena, having placed second in Electric World Championship for R/C $37.50, which includes all costs except the above-mentioned contest. His first cars, August 13 through 21, 1982, at the local tax, though price may vary by regular monthly column will begin with Grand Hotel, next to Disneyland, Ana dispenser. the October issue. heim, California. "The slight inconvenience involved in Welcome aboard! Of the 120 contestants, 42 will come sitting while a hearing aid specialist takes HOT STUFF DUZ IT AGAIN! from Europe, 35 from Japan.and 43 from ear impressions of both ears is certainly You just never know all the possi various parts of the United States and worth it from the standpoint of saving bilities for the use of cyanoacrylates. Just Canada. Official breakdown is as fol your hearing. And if you need a further assume that anything’s worth a try, and lows: England, 10; Italy, 6; Switzerland, 98 MODEL BUILDER IN THE BEST CIRCLES, IT’S fib e r skiver A PRECISION INSTRUMENT FOR THE DISCRIMINATING MODELER Safe, Rear Draw-Bar Clutch Available in seven satin anodized handle colors: Precision, Instrument-Quality Materials silver, blue, red, green, gold, copper, violet. Complete set in fitted hardwood case: includes Strong-Holding Advanced Collet Design uber Skiver, together with two vials containing Non-Rolling Hex Cross-Section four No. 11, and one each of Nos. 10, 12, 15, Deeply Knurled, Non-Slip Grip and 20 ...... $14.95 Individual handles (specify color) $5.95 Long-Life, Stainless, Vial of 6 blades (No. 10, 11, or 15) $ 2.10 Surgical Steel Blades (No. 12 or 20) $3.30 20 See your dealer, or order direct. 0 Dealer inquiries are invited. PRODUCTS All direct orders sent postpaid in U.S. MODEL BUILDER California residents add 6% sales tax. 621 West Nineteenth St., Costa Mesa, California 92627 4; Germany, 6; France, 5; Denmark, 4; doesn't carry it,' Ί don’t buy from the "The shop where I buy most of my Holland, 1; Sweden, 2; Austria, 3; Nor distributor that handles that because I stuff finally got a K&S metals display and way, 2; South Africa, 2; New Zealand, 7; don’t like him,' or 'that product isn’t any complained about how much the Austrailia, 8; Japan, 20; Canada, 1; and good anyway.' I have had each of those damned thing cost. He had been refer the rest from the USA (Oh, well . . . its answers on many occasions, when I’ve ring people to a hardware store that has close to 120!) Kraft Systems and Sanyo asked for specific items he doesn't have had such a display for several years. This are major sponsors. in stock. One specific item is Crish props same fellow said he was going to handle The 370-foot track, with 11 turns and a ... the nylon type (which I feel are a complete line of quarter-scale stuff, 100-foot straightaway will be located in better than the Top Flite that he carries) but now he’s stocking helicopters and the Grand Hotel parking lot, along with and more recently the large quarter- pushing those. spectator facilities and a 100x200 foot scale wood props that Crish makes. I "I guess I could go on ad inf initem ad circus tent for the pit area. Friday, have had answers one, two, and three nauseam, but I hope I've made a point. August 13, through Monday, August 16 from him on Crish props. When I The hobby dealers share responsibility will be for practice and registration. became interested in a large gasoline for their decline in sales, I believe, how Qualifying heats will begin on Tuesday, engine for giant scale a couple of years many hobby shops are there any more August 17, and the finals will take place ago, he used each of the above four that try to attract the youngsters? Most on Saturday afternoon, the 21st of answers when Quadras were generally of the stock is the expensive stuff for August. available. One of my other favorite R/C. REBUTTAL hobby dealers said, 'I’m not handling "Incidentally, I bought some spruce "Dear Bill, any of that quarter-scale crap.’ I bought and other items from Aircraft Spruce "I read with some interest your an Evra from Hobby Lobby because I and Specialty Co. as advertised in Model column in the June issue that contained could get one and it was reasonably Builder. It is better in quality and cheaper a reprint of Ray Cummings column priced. in cost than that my hobby dealer sells. concerning the need to support your "/ realize (perhaps not the order of They also have some interesting prices neighborhood hobby shop as opposed magnitude) that a lot of inventory is on aircraft dope. to buying from the discount houses, expensive and it is difficult to have any Sincerely yours, supermarkets, etc. I generally agree with inkling of what a fickle modeler wants or Bob Chanslor what was, has been, and will be said will buy. However, I believe that part of Peculiar, Missouri" about buying from the local hobby the reason for turning to mail order is Good points, Bob, and I’m sure we’ll shop. There is another side to this coin out of necessity as much as trying to save hear from some dealers on the subject. that I've never seen printed in Model a buck. Also, I believe that a part of the There's still the problem of the nickel Builder or anywhere else. Cost is not expansion of the discount houses is and dime stuff (just an expression .. . always the reason for mail orders to because modelers can get what they nothing is a nickel or dime anymore!) Hobby Lobby or any of the other dis want within a few days by United Parcel. that you depend on your local dealer to count houses. Some hobby shops have switched to arts supply. Is it practical, from a time and "I prefer to buy from a (my) hobby and crafts because there is more profit in convenience point of view, to buy this dealer, but what am I to do, when he it, and I suppose a faster turnover of stuff by mail-order, discount or says, Ί can’t get it,' 'my distributor stock. otherwise? · HOSTED BY: R C BEES IN C . OF SOUTHERN CALIF & MODEL BUILDER MAGAZINE IMAC RULES FOR: SPORTSMAN— ADVANCED— UNLIMITED. AMA RULES FOR STAND-OFF SCALE(BIPLANE). AMA SANCTIONED; AMA AND FCC LICENSE REQUIRED. USPJA JUDGES...QUADRA ENGINE RAFFLE... FOOD STAND...PILOTS PACKAGE ... PLAQUES TO FIFTH PLACE ALL EVENTS. REGISTRATION; 8:00AM, FLYING; 9:00AM. MAX EN GINE; 4.4 CID, MAX WEIGHT; 44 lbs. ENTRY FEE; $ 15-PRE-REGISTRATION, $20-AT SITE, $7-SECOND EVENT. SEPTEMBER 19TH-20TH, 1982, MILE SQUARE PARK, FOUNTAIN VALLEY, CA CD: FRED BROWNS, 8037 CYCLAMEN WAY, BUENA PARK, CA. TEL. 714-522-1931 CONTEST MANAGER: B. HEUERMANN, 2365 CAMINO REY, FULLERTON, CA. TEL.714- 870-0875. PRE-REGISTRATION: NAME...... ADDRESS...... CLASS(S)...... AMA#___ FCC#...... FREQUENCY (MHZ)...... (MAKE CHECKS TO R C BEES INC) 100 MODEL BUILDER Ρ 51 Mustang 1 /5 scale ftaggerwing Beech /5 scale Christen Eagle II A-36 Beech 1 /3 scale 116 scale V 35 B Bonanza 116 scale F-86 Sabre Jet ^ Avail in D & H models (ducted fan! 11S scale A 4 Skyhawk (ducted fan) 1/7 scale General information about F-16 (ducted fan) ihese now product re 1/8 scale leases found in catalog. MiG-15 (ducted fan) 116 scale MiG 1 5 (ducted fan) 116 scale Byro J e t ducted fan F-33A Beechcraft (for .6 0 engines) 1 16 scale Pitts Special J / 3 scale v Scale Realism. Pulse-Quickening Performance. State-of-the-art technology. Unsurpassed Quality. These are but a few of the many reasons why modelers the world over look to Byron ^ Originals for model aviation’s best buys. It's a unique product line of superior technology, conceived and perfected by more than twenty- T-34C Mentor five years of manufacturing experience seasoned with a 1/6 scale Beech Baron 58 116 scale sincere concern for quality. At a time when others are com promising on design, realism and quality in order to cut costs, Byron Originals continues to strengthen its reputation by consistently offering more product for your money. Reach for realism. It's a modeling experience you can't afford to pass up. For complete product line information, send $ 5.0 0 for our new fcomprehensive catalog. It's full of color and Ď/W photos. ipmical in- Catalog price Mirage (ducted fan) id towards 1/7 scale i Catalo^^$5 00 ^ ORDER YOUR (Refunded with initial purchase) CATALOG Byron Originals. P.0. Box 279, Ida Grove, Iowa 51445, NOW! Ph: 712-364 3165 Ί Jr » 11 • ] * • • l/r 1'Ύ We gave It 5 yean of wear In 11 grueling days . . . No backfires, break downs or loss of power... no problems at all! Once again, Enya proves that in performance and reliability, they're second to none. The te s t. . . We took a brand new .40 4-cycle right off the shelf for this endurance experiment; a totally stock engine with no modifications at all. First we miked all internal parts. After bolting it down, we cranked it up - for 124 tortuous hours! We kept it running at 7,000 r.pm.’s, and regularly went from idle to 10,000 r.p.m.’s to constantly make sure it was tested at all power ranges. In short, we gave it every opportunity to break, but it didn't! The results . . . After 124 hours, it was still running strong - no sputtering, backfiring or missing. And all the time we ran, not once did we have to make any adjustments on the valves. So we decided to break it down and take a look inside. As expected, the engine maintained its off-the-shelf appearance with no evidence of oil or compression leaks, wear rings or grooves. The engineers were amazed at the lack of heat or burn marks. There was hardly a touch of wear. But it was only when we tested the major parts and assemblies for wear that we could measure the true success of our experiment. Miking to ten-thousandths of an inch, this chart reveals how well our engine stood up to this grueling test: B iltn A llir Bore 8770 8770 no change Stroke .6725 6725 no change Piston Dia. .8750 .8750 no change Wrist Pin .1965 .1960 Rod Bushing Dia. At Wrist Pin .1975 .1975 no change Rod Bushing Dia At Crank Pin 2172 .2178 Valve Litters .197 197 no change This strength is the direct result of experience in selecting materials with the ideal finish, tensile strength and exact temperature coefficients ... and then honing them to precise tolerance levels. And it's the same precision that we put into each and every Enya product. So if you buy any Enya engine, from our .09 to our monster .60XL, you'll get the same reliable performance time-after-time, year- after-year. Enya ... buy it with confidence and wear it well.