MAY 1989

08545

$2.95

Canada $3.95

volume 19, number 207

Humongous Sage Hen OLD TIMER C a b in ette Increase the response time of your R/C model These compact, lightweight solid state units with Airtronics' top quality electronic speed controllers, utilize MOS FET Transistors and feature Proportional Airtronics speed controllers ^ Electronic Throttle Control and enable you to proportionally control Φ Η Μ ρ Μ Η Η Η Β Μ Β · Battery' Voltage Regulation. the electric motor speed of vourR C v * Our complete line of electronic car without the use of an extra servo. speed controllers are fully State of the art componentry compatible with all Airtronics high design and Airtronics' proven engineering technology quality radio control systems and accessories, assures you instant throttle control response and fast Whenyou think about electronic speed controllers, performance in less than 1/1000 of a second. think fast, mink Airtronics.

96309 CHAMP SPEED CONTROLLER

Designed for the performance-minded R/C enthusiast, Champ allows modelers to economically replace outmoded throttle servo and mechanical speed controller functions with the advantages of a superior electronic speed controller system. Tnis affordable, non-reversing electronic speed controller is intended for use with stock motors utilizing 6 cell battery packs.

Specifications: Voltage Loss: 0.010 Volts Per Amp Dimensions: 1.26"xl.69"x0.63" Current Rating: Surge · 300 Amps / Continuous ■ 90 Amps Weight: 0.78 or.

96310 IMPULSE SPEED CONTROLLER Ideally suited for on or off-road use, Impulse offers the con­ venience of reverse throttle at an affordable price. Responsive reverse and proportional forward control functions gives modelers all the performance advantages of advanced electronic speed controller technology. The economical Impulse speed controller is specially designed for use with stock motors utilizing 6 cell battery packs.

Specifications: Voltage Loss: 0.010 Volts Per Amp Dimensions: 181"xl 54"x0.63" Current Rating: Surge - 350 Amps / Continuous · 90 Amps Weight: 2.2 Oz.

96311 VORTEX SPEED CONTROLLER

Engineered for the advanced competition driver; Vortex is suitable for on-road cars or competition oval racer application, Vortex features 1 controller tech-

This highly efficient speed controller is intended for use with stock or modified motors utilizing 6 or 7 cell battery packs.

Specifications: Voltage Loss: 0.0052 Volts fer Amp Dimensions: 0.67"x2.2"x0.57" Current Rating: Surge · 420 Amps / Continuous · 105 Amps Weight: 1.13 oz.

^AIRTRONICS m Airtronics' complete product catalog At Airtronics, we want to be known is available for $2.00. Please send check as the best, not just the best known. ' 11 Autry, Irvine, CA 92718 (714) 8308769 or money order to Airtronics, Inc. New b o o k “briefings” fro m H.A.

REVOLUTION IN THE SKY. Allen. New. re­ JACK NORTHROP AND THE FLYING WING. U.S. NAVY AIRCRAFT 1921-1941 vised edition Allen tells the exciting stories of Coleman. The teal story behind the Stealth U S. MARINE CORPS AIRCRAFT 1914-1959. all the passenger planes built by Lockheed Bomber (The new B-2 Is based on technology Larkin. Now back-ln-print alter 30 years. during the Golden Age-Vega. Air Express. developed by Jack Northrop some 40 years Larkin's Illustrated surveys of Navy and Ma­ Sirius. Orion—and the pioneers who llew ago.) A story ol Intrigue, sabotage, collu­ rine corps aircraft remain two of the most them-Lmdbergh. Wiley Post. Amelia Earhart. sion-w ritten by one ol Northrop's close asso­ valuable books ever published about these air­ Turner. Doolittle, and others Illustrated with ciates First hand account ol the obstacles, planes. More than 1.000 rare photographs 250 historic photos and scale drawings. 256 personalities, government Interference, the chronologically presents detailed descriptions p g s . 8 V r"x 1 Γ . hdbd A Reviewer's confrontation with Convair, and the grit ol this ol the aircraft of this period. Both boo C h o i c e ! ...... 3490C S24.95 most visionary of pioneers. 83 photos. 284 printed as a single volume. 6 1 2 p g s . pgs.. 6 V«"k 9VT. hdbd 4450A524.95 hdbd...... 3491C CIERVA AUT00RIR0S: The Development of U.S. AIR FORCE AGGRESSOR SQUAORONS: C Rotarv-WIng Flight. Brooks. The story of Juan THE B-1 BOMBER. Holder. The updated story t M Vol. 11. Klnzey and Leader Aggressor de la Cierva who pioneered the development ol ol America’ most controversial aircraft to date. pilots-based at Nellis AFB, Nevada: Clark the Autogiro Examines each successive tech­ History design details, technological break­ AFB. Philippines: and Alconbury England- nical step culminating in the development of throughs. political upheaval, weapons, ter­ lly Soviet tactics against other Air Force pilots the "jump take-off" Comprehensive collec­ rain-following Right profile and all aspects ol to provide realistic air combat training. Air­ tion of photos. 56 3-view drawings, appen­ Its (light testing, production, deployment, dixes. 4 16 pgs.. 6% wx 9 V T . hdbd craft including T-38S and F-5s, are painted in plus a look Into the future. 125 excellent pho­ schemes used by Soviet Union and Warsaw ...... 4354C $35.00 tos, 11 In color. 102 pgs., 7 'Λ " x 9 Υ Γ Sfbd. Pack. More than 50 full color and 100 black ...... 1035A $10.95 WALDO: Pioneer Aviator. Waterman. The true- and white photos, plus official AF drawings to-life story of Waldo Waterman. Barnstormer, LOCKHEED U2R/TR-1: Minigraph 28. Miller & depleting camouflage patterns. 64 pgs.. 815" inventor, test pilot His life as an early TWA Pecock Detailed account ol this second gen­ x i r . s f b d ...... 1154A $11.95 pilot. Hollywood flying in the epic of Hell's eration U-2 family Covers all lacets. Including Angels" film, winning at the National Air lllght test, development, and operational ser­ MCDONNELL DOUGLAS AIRCRAFT SINCE Races and of his perfection of the only suc­ vice and NASA usage. Forty pages ol facts, 1920. Frandllon. Discusses the great aircraft cessful flying automobile Captures the flavor, figures, line drawings, over 200 photos. 8 Irom the two manufacturers, such as the excitement, glorv and heartbreak of American page gatefold. 4 pages color. BYT x 1115” , World Cruisers, the DC-1. 2 and 3 series, the aviation 1910-1 §44 300 photos. 502 pgs.. Sfbd...... 3264AS9.95 wartime ships such as the Devastator, the I klMM’i 6 "x 9 ".s fb d 1440B $18.95 SBD. and the post-war series of DC aircraft. Including the Skyhawk and Skyray. Each type VV.iklo I k'jn WLifcruun described in minute detail with three-view BEECHCRAFT: STAGGERWING TO STARSHIP drawing. 480 photos. 640 pgs.. 515” x 815". Ed Phillips. Staggerwing. Twin Beech. Bonan­ hdbd...... 3384C $39.95 za every production and experimental ^eechcraft Beech airplane ever flown is documented THE MARTIN B-26 MARAUDER. Havener A .(■ajtwtw, to xtuship Complete warbird coverage of UC-43. GB-1. controversial aircraft, difficult to fly with no .A C * AT-7. AT'1 t. C-45. the mighty XA-38 Grizzly. safety margin, but rugged and heavily armed ” Postwar years Including Model 35 Bonan2a, Covers the design, testing, its near-cancel­ Travel Air, military and expon models. T-34 lation by critics and its outstanding combat Mentors. Barons. Dukes and the legendary history The author llew more than 50 mis­ King Airs: they're all here plus much, much sions In the "widow-maker." details aerial more. 245 photos. 343-view drawings, tech­ battles, accompanied by 150 outstanding. nical specifications. 96 pages. 8 W * x 11". never-belore-published" ” ' ' photos phi 264 pgs . 6 " sfbd 2012A $14.95 x 9 " Sfbd 1079A $16.95

THE PIPER CLASSICS. Christy. The tun 8 ELLAH-1 COBRA VARIANTS. Peoples Com­ "C ubs"—simple tube and fabric aircraft. Dis­ pletely describes all variants Irom mock-up cusses the evolution ol Piper llghtplanes—J-3 studies to the latest AH-IWs Historical cover­ Cub. J-4 Coupes. J-5 Cruiser. PA-11, PA-18. TOP OUN, THE STORY BEHIND THE STORY. Watch Ameri­ age. flight lest programs and operational as­ Vagabonds. Colts. Pacer/Tri-Pacer, even Wag- ca’s real Top Gun pilots In action over Libya, the Indian Ocean pects Is detailed. 250 photos, most never-be- Aero's CUBy, Also covers: problems. SPECS, and off the Soviet Union. In actual dogfights, crashes and fore-publlshed. 35.000 words of text, rebuilding, maintaining and operating. 101 II- MIG confrontations. Listen In on actual air-to-air radio conver­ side-view line drawings, camoflage schemes, lus. 160 pos. 5” x 8 ” , sfbd 42088$13.95 sation and feel what it’s like to fly twice the speed of sound. 35 and a modeler's haven of intimate detail 64 m in u te s ...... V8761 $ 1 4 .9 8 pgs . 8 % ·'x 11". sfbd. 3261C $12.95 CESSNA 150 and 172. Clarke. A buyers guide ...... 1141A $11.95 STRIKING BACK. A video of Ihe famous Ida Grove radio-con- THE C-130 HERCULES, McGowan Tactical CESSNA 172, Clarke. A buyers guide trolled model airshow. The show Is a very real and Intense re­ airlift missions 1956-1975. The C-130 Is rec­ ...... 1140A $12.95 creation of South Pacific war action portraying the human ognized as the outstanding airlltter ol all time. struggle to evict Japanese from the Islands. Using l/5th scale Tne author, a C-130 veteran, describes the THE PIPER INDIANS. Clarke. A model-by­ aircraft, ships and tanks, the spectacular event Includes air important Vietnam missions the resupply model inspection ol the series the original PA- battles, sinking ships, paratroops and mucho machlnegun fire, of Khe Sanh. evacuation ol Kham Due. C-130 28 Cherokees · the improved Indians: War­ exploding flak and giant pyrotechnics. 30 minutes bombers. Hare missions and other special riors. Archer, Dakota - the retractables; PA-24 ...... V87B4 S 1 4 .9 8 missions A must lor Herky buffs. 116 photos. Comanches, PA-28R Arrows · the hard work­ 288POS., 6”x9” . . 4298A$15.95 ing sixes; and the Tomahawks. Apaches. Cov­ GIANTS OF LOCKHEED. Nearly a hall hour of exquisite HORNET, Drendei. The story ol the Navy and ers: where to find, maintenance, specs, refur­ round and aerial views of the Incredible SR-71 Blackbird. bishing, and all of those AOs and STCs and Marine Corps' newest Fighter/Attack alrcraH cene after scene shows off this triple sonic. turbo-ram|et from design, development and service. With modifications. 112 photos. 288 pgs. 7” x gpowered aircraft, built two decades ago. The next segment 130 B&E photos. 18 paintings, two 11x16 10". sfbd ...... 4213B $16.95 portrays the C-130 In all its glory. Then witness the awesome double page pull-outs of 1/72 scale drawings, abilities of the C-141 Starllfter and Ihe mighty C-5 Galaxy as and his own experiences in the F/A-18. Dren­ in , WINGS OF CESSNA: MODEL 120 TO THE Cl- they power their wayw a y aacross c ro s s ccontinents o n tin e n ts wwith ith mmassive a r * ' 'loads. “ All ‘ " dei has packed 64 with the Hornet mystique. jf 'C e TATION III. Ed Phillips. The complete family of color.' ------70 minutes. ' "VHS '■ * ...... V8768E * 3 2 .9 5 Cessna airplanes from the rag-wing 120 to the ...... 4110A $6.95 high-tech Citation III. Experimental ships, FALCON DOMAIN. The F-16 FIGHTING FALCON, the Air one-of-a-kind, the CH-1 helicopter and mili­ Forces’ new air defense tighter and the Navy's new "TOP F-8 CRUSADER, O&S #31. Klnzey Vought’i tary models, every one documented with tech­ GUN” aggressor aircraft are featured In this indepth 90 minute F-8 was flown by the U.S. Navy and Marine! nical changes by model year, sp ecs. perform­ feature. You're in the cockpit during breathtaking low level at­ throughout the Vietnam war. Covers all tighte ance, total built and serial number data. 229 tacks and 9-G dogtlghtlng. You'll fly with the world famous and reconnaissance versions Lots ot never photos of airplanes and Instrument panels "Thunderblrds" as they do their performance to music. (Color before-published photos of cockpit, earner! plus more than 50 detailed 3-view drawings H I-FI. 90 m in u te )...... V 8728D * 8 9 .9 8 bays, landing gear, engines, armament, ane make this a valuable reference for the bull and variable-incidence wing Modelers sectior modeler. 100 p g s . sfbd 2011AS12.95 gives kit reviews, decals, etc. 223 photos, TH E AIRSHOW. The most spectaculartp e c ta c u i performances of the US many In color, plus 3-view drawings. 72 pgs Blue Angels, Italian Freece Tricolor!, Canadian■' *Snowbirds " Is plus CURTISS 1907-1947. Bowers Complete his­ 8 V ' x i r . s f b d ...... 1157AS9.9: the Brazilian and French national aerobatic teams as the tory of Glenn Curtiss and his companies. . ______te p er­ form at the Canadian Abbottsford International Airshow. Take Model by model coverage with dear crisp fac­ NEW! Detail $ Scale Series your seat In the cockpit of the world's fastest and sexiest air­ tory photos, historical detail and lull specs. Vol. 32-A-4 SKYHAWK (U.S Navy and Marini craft as they swoop and soar wingtip to wlngtlp. W itness exhi­ Covers early experiments by Glenn Curtiss Versions) . 1158AS9.9! bitions of the Harrier. Tomcat. Hornet. Concorde and SR 71 and exhibition tours. From early flying boats. Vol. 30-F4F WILDCAT (All F4F. FM-1 & FM-i June Bug. NC-4, Jenny. Hawk lighters and Blackbird. 60 min. A REVIEWER'S CHOICE...... VHS V8979N only *19.98 Versions) . . 1156A $9.9! racers, Robin. Condor to Ihe P-40’s. C-46 and Vol.4-F-111 AARDVARK (Revised 2nd edition ALFA WING let a /c. Hundreds of photos. 637 pgs., 5W " x ...... 1044A $9,9! 815” . h d b d ...... 3383C $34.95 Filet Manuals REE ENGINES T-28 TROJAN IN ACTION, Adcock. T-28 was HALF A WIHG. THREE ENGINES AND A Ρ-3Θ . 14018 $6.95 B-26 the firsl post-war trainer and served both PRAYER: B-17« Over Germany. O'Neil. Five P-39 . 1402B $6.95 F-4U . 1412B $7.95 D A PRAYER USAF and USN in training roles. Covers de­ members of one 6-17 crew look back on their P-40 ...... 1403B $6.95 F-6F . 1413B $7.95 sign and development ot T-28A. B. C and 0. i7s ow>r («entwin entire twenty-live missions over Germany dur- P-47 ...... 1404B $6.95 FM-2 1414B $10.95 Over 110 photos. 70 detail drawings. 13 full- Ing Ihe crisis period ol 1943-44. The crew $9.95 AT-6 1415B $7.95 color paintings, 50 pgs. 11" x 8 V1 ” . sfbd. holds nothing back, as they relate how they P-61 ...... 1405B $7.95 Spitfire . 1416B $3.95 4117A $6.95 saw and reacted to the same terrible events- P-63 1406B $7.95 Hurricane 14178 $3.95 and how they survived, and an overview of the P-82 . 1407B $7.95 Mosquito .14186 $3.95 NEWI In Action S eries- . daylight bombing cam palgn-ls a story which B-17 ...... 1408B $8.95 Me262 .14198 $7.95 SUKHOI FITTER IN ACTION 4118AS6.95 deserves to be------retold- 70 photos. 224 pgs.. B-24 1409B $10.95 F-80 . 1420B $7.95 CH-47 CHINOOK (April Release) 6 ” x 9” . sfbd...... 1084A $14.95 B-25 ...... 1410B $10.95 B-29 .14369 $10.95 ...... 4119A $6.95 14 DAY MONEY BACK GUARANTEE H i s t o r i c ^ Total H > l Send Items: Is Call us Toll Free Please s 3.95 H andling Print Total Enc. Is U.S. Funds 800225-5575 ■ Aviation Name“ __ 3850H CORONATION RD.. EAGAN. MN 55122 MN, AK, and foreign countries use 1 -612-454- Address. Charge: □ VISA □ MasterCard 2493 (not toll free). Charge VISA or Master- Card. MN residents add 6% sales tax. Acct. No------City____ Dealers Invited. Authors manuscripts Invited. Exp. D a te ------State___ .Zip. . Country. M O D E L y ? MAY 1989

volume 19, number 207

898 West Sixteenth St., Newport Beach, California 92663 Phone (714) 645-8830

STAFF CONTENTS EDITOR/PUBLISHER Wm. C. Northrop, Jr. FEATURES GENERAL MANAGER Anita Northrop ASSISTANT GENERAL MANAGER WORKBENCH, Bill Northrop...... 6 Dawn Johnson DEAR JAKE ...... 7 MANAGING EDITOR OVER THE COUNTER ...... 8 Richard Dowdy

IMS ATLANTA PREVIEW, Bill N orthro p...... 11 PRODUCTION ARTIST Kimber Jett-Baird ELECTRONICS CORNER, EloyM arez...... 14 DRAWINGS BY INSIDE ENGINES, Stu R ic h m o n d ...... 20 Al Novotnik BRIMFIELD FLOAT FLY, Stanionutis...... 22 ACCOUNTING MANAGER Robert Ruiz ELECTRIC POWER, Mitch Poling ...... 25 SUBSCRIPTION MANAGER CHOPPER CHATTER, lames W ang...... 26 Audrey Peterson BIG BIRDS, A lA tm a n ...... 30 MODEL DESIGN AND TECHNICAL STUFF, Francis R e y n o ld s...... 32 CONTRIBUTING EDITORS Al Alman Mitch Poling R/C SOARING, Bill Forrey...... 34 Jake Doe John Pond Bill Forrey Fernando Ramos PLUG SPARKS, lohn P o n d ...... 38 Steve Gray Francis Reynolds REVIEW: DAVEY SYSTEMS' CESSNA 150, Dick M a so n ...... 44 Bill Hannan Stu Richmond Dick Hanson Bob Stalick ALL ABOUT ARFs, Dr. Art Steinberg...... 46 Dave Linstrum Art Steinberg HANNAN'S HANGAR, Bill Hannan ...... 48 Fred Lehmberg John Thompson Eloy Marez J ames Wang FREE FLIGHT, B o b S ta lic k ...... 50 Walt Mooney Bill Warner INSIDERS, Dave Lin stru m ...... 56 ADVERTISING CONTROL LINE, John Thom pson...... 58 Gordon Boudewyn Advertising Accounts Manager FREE FLIGHT SCALE, Fernando Ramos ...... 60 Corporate Office (619) 744-7337 CONSTRUCTION Al Novotnik 4 Beverly PI., Norwalk, CT 06850 HUMONGOUS SAGE HEN, Bruce Edwards and A l A lm a n ...... 15 Bus. Phone (203) 847-7478

G.E. "CABINETTE" O.T., Frank Ehling...... 43 MODEL BUILDER (ISSN 0194 7079) is published monthly by RCMB INC., 898 MARTINSYDE S-1 PEANUT, John Berryman...... 53 W est 16th St., Newport Beach, California 92663. Phone (714) 645-8830. COVER: On October 26.1925, “Jimmy" Doolittle flew one of three specially prepared Curtiss Subscriptions: $25.00 per year, $47.00 for R3C-2 racing biplanes to victory in the Schneider Cup seaplane competition held that year at two years. Single copies $2.95. Subscrip­ Baltimore Maryland. This was to be the first of three major race victories that would catapult tions outside the US (except APO & FPO) Doolittle to national hero status. (The other two were the 1931 Bendix and 1932 Thompson races, $38.00 for one year only. All payments already commemorated as Model Builder cover paintings.) It is interesting to note that the R3C-2's must be in U S funds, drawn on a U S bank. flown on floats in the Schneider were the same aircraft used for the Pulitzer landplane compe­ Copyright 1989 by R C M B IN C. All rights tition flown only weeks earlier. The other two R3C-2's were U.S. Navy airplanes and were finished reserved. Reproduction without permission in medium blue and yellow: Doolittle's Curtiss was an Army airplane and was the only one painted prohibited. blue-black and gold. Change of address notices must be The second-place finisher was the British Gloster IIIA, flown by Henri Biard, who was to have received six weeks before date of issue that flown the Supermarine S-4 which in fact suffered structural failure during pre-race trials. The position of the Gloster serves to illustrate the aggressiveness with which Jimmy Doolittle flew new address takes effect. Send old address a low, tight, precise race. with n e w .. .old label preferred. Duplicate The acrylic-on-canvas original painting is available for purchase. Collector prints of this, as well issues cannot be sent. Postmaster send ad­ as all the earlier Classic Air Race cover paintings, are available. Please call or write Robert A. dress changes to Model Builder, 898 W . Benjamin Aviation Art, 1222 26th Ave. NE, Olympia, WA 98506, (206) 352-2602 for informa­ 16th St., Newport Beach, California 92663. tion and a free illustrated print catalog. Second class postage paid at Newport Beach, California, and additional offices. 2 MODEL BUILDER

NEW PRODUCTS FOR 1989 Cleaning up a greasy, dirty model airplane after a flying session is one aspect of the hobby that isn’t really much fun. In fact, it can be a real pain in the elbow! After years of trying different soaps, solvents, and miracle cleaners, the Sig Factory Fliers came up with an economical “ home brew" formula that really cleans off the crud. Simply spray on and wipe off! BLUE MAGIC AIRPLANE CLEANER cuts through dirt and oil for a quick clean up. It safely removes messy ex­ haust residue without harming painted model finishes or plastic iron- on coverings. Leaves your models clean and shiny with no streaky residue. At last, here is an effective product designed exclusively for 1 MODEL cleaning model airplanes at the flying field that is non-hazardous, non­ flammable, biodegradable, odor-free, and inexpensive! BLUE MAGIC AIRPLANE CLEANER is 100% guaranteed to do the job. Available in handy spray bottle and economical refill sizes. SPRAY ON — WIPE OFF! KEEPS YOUR MODELS LOOKING GOOD!

ECONOMICAL TO USE! BLUE MAGIC CLEANER REFILLS AC-002 16 FL. OZ. (1 P T . ) ...... $1.50 BLUE MAGIC CLEANER WITH DELUXE TRIGGER SPRAY BOTTLE AC-003 32 FL. OZ. (1 Q T . )...... $2.50 AC-001 16 FL. OZ. (1 P T . ) ...... $2.95 AC-004 64 FL. OZ. (Half G a llo n )...... $3.50

THE ANSWER TO AN AGE-OLD PROBLEM

WHEEL PANT SH-726 For 1/8” Axles $2.95 per pair MOUNTS SH-727 For 5/32" Axles $2.95 per pair SET SCREW Wheel pants add class and style to your model, and are a must for some scale models. But fitting wheel pants to a wire landing gear can be a difficult and frustrating problem - that is, unless you have SH-720 For 3/16” Axles these handy little mounts from Sig! Made from tough molded nylon $3.95 per pair with an imbedded brass insert, the mounts use a socket-head set screw for maximum tightening power. SH-721 For 1/4” Axles $3.95 per pair The smaller wheel pant mounts come in two sizes to fit 1/8" or 5/32" diameter wire landing gear and are just the right size for up to ACTUAL 60-powered aircraft. The larger mounts were designed specifically for giant models and also come in two sizes to fit 3/16" or 1/4" diameter wire. Each package contains a pair of mounts, four mounting screws and two set screws.

X-LARGE LEAF-SPRING TAILWHEEL ASSEMBLY This super strong tailwheel assembly was developed for giant-sized models weighing over 15 pounds. It features a unique molded nylon tailwheel bearing with scale-like appearance, hardened spring-steel leaf springs, complete hardware, and a formed 1/8” dia. tailwheel wire that will accommodate up to 2-1/4" dia. tailwheels. The mold­ ed nylon steering arm and heavy-duty rudder control horn are con­ nected by high-quality coiled steering springs. The shock absorb­ ing ability of this unit will insure years of trouble-free service on even the roughest of flying fields. SH-730 ...... $17.95

See your dealer first! If not available, call 800-247-5008 toll free for orders only. For ■ ■ 1 ^ · • M o s le fC o r d domestic orders under $15 add $2.50 postage. Over $15 ppd. Latest Catalog - $3.00 VISA SIG MANUFACTURING CO., INC...... Montezuma, IA 50171 s ig s BUY FROM AUTHORIZED SIG DEALERS x s i g CANTON GREATER KANSAS CITY M AIDEN TACOMA Country HobbW· Advenced Flado Control Hobbwa Hobby Haven Prop A Wheel· Hoobwa CULLMAN Route 2. Bo« 291 130 W Bro w ) S t Narrows Plaza 2310 Marked W Curtman R C Hot*»· 121 323 Tump*· St 09 Mate·» S Shop Ctr. Independence Center. WINSTON-SALEM WILLIAMSPORT TACOMA 100 2nd A ve S W 10372 Ratalon Road LO M BARD C H IC O P E E G A D HobblM A 10901 Mcfcman kAiia Dr The Hobby Comer Grovnng Τγ μ Toys A Hobbwa BlTs Hobtry Town FOOT PAYNE AURORA j a J Hobbwa 718 S Mam S t MARYLANO HEIGHTS 138-C Oakvrood O f P h 7253680 116 W aw Thud S s e e i 13823 P a c ific A va P h 5 3 i f t m SKA'· Ails * Crafts Tom Thumb Hobby Center 133 Frontenec S i P h 582-1472 10718 E . CO M» P h 3818158 O A K LAW N Flyin g Mod··* Hobby Cenwr NORTH DAKOTA WARMINSTER WALLA WALLA 2207 Θ G ault Αν· N EAST FALMOUTH FARGO H aney'· R C COLORADO SPRttG S PM '» Hobbwa A Crafts 7723 Crave Coeur Mia Roed J C RC HoObwa MOMEW OOO Vtftey Hobby A R acew ay 13 York Road PH 872*200 Rw 1 B i 277A Ph 5292818 5730 W 054h P h 4248131 ST C H A R L E S Homewood Toy A Hobby 153 E Fekn o u ti 1543 S o 1st A ve S o WEST CHESTER 2813 E Plan· Av· Mark Twam Hobby A Craft 2830 S o 18*· S t EAST LONGMEAOOW PH 701236-1272 Mod* Aacran Supply CeMar GRAND JUNCTON Rockford Hobbwa. me Btii'a Hobby Supplws 1201 S 5lh S t M O FIE L D 810 So Rockfcxd Ave OHIO RouW 162 A Tawgraph R d 5 » N 208i P H 4 5 3 6 2 » The Hobby Hui 800 N Mem S t Ph : 738-7711 S T L O U IS AKRON W E S T v n o w * M«jfwk) Hobby HU 811 Norm 12«i Stract SPR era FIELD F IS K DALE J A J Hobbws M tW r's Hobby Shop CHARLESTON 824 am S i CONNECTICUT The Hobby Houee. me 5811 S o Lind b e rjh MOBILE K/N HobbW· A Toy» 1018 Kanmom B lv d 848-2284 Founwm Hobby Caraar BERLIN 3419 Chatham Road SUNRISE BEACH Motion Magic Hobbwa. Inc. TIN LE Y PA R K 559 Mam St BALTIMORE 2 » W Waanmgton Si J A S R i C Frank'· Service W IS C O N SIN 3030 Α » port B V d 182 M ill S t P h 828-1775 Or land Hobbwa FRAMINGHAM Skwfty Sporting Goods PH 2088458700 18962 O ak Pa rk Ave Fw har R C R t 2, Box 575 145 Baiim cre-Som erset R d N W 2227 W Marker Si APPLETON BRISTOL MONTANA O X FO R D PM 3124298011 17 Satrm Road BERLIN HEIGHTS SOUTH CAROUNA Gataxy Scwnce A Hobby Canter Bristo l Hobby Center. me VCTOR 7 » Northland M a t Plan·· n Thing· 841 Farmington Av· WAUKEGAN O R E E N F C L O Oanwr· Hobbws MYRTLE BEACH Murph'a Hobbws » Cenwr Street FOND DU LAC Oumterd MM B n a ld P la ta PH 583-7273 Chano HobbW· Ed's Hobby SN p 239 Warn Vww Drrue CENTERVELE SCOTTSBOHO BROOKFIELD 40 Bank Row PM 7738300 702 Mam S i PH 4486885 NEBRASKA A Hobby Shop P*nd«grM· Hobby Shop PM 3128824544 HANSON PCLZER BELLEVUE 13 N Mam S i P h 433-7127 H U East Wbow 647 F Marwon Hobby, me. FO R T W A YN E 830 Mam S i G ary'· Mobbytown CHAGRIN FALLS Ptv4'» Hobby Shop LYNN 701 Oatvm R oad SO N o 103 Tram·. Boats A Plan·· Co. ANCHORAGE The Hobby Center Swpnorih. IX North Mam A Tod Store Ph 41449862» Anchorage Houae at Hobbwa 368 M an S i PH 7488984 1722 Lake Ave P h 4286068 Hobby C ity NORTH PLATTE PMteraon's Hobbws C iN C W N A Tl 1204 M l GaAant R o w ) 1 X 7 ?m S t *1 585 Ingr· 772-5851 GLASTONBURY RICHMOND 283 Lynnftek) S i R adio Control Comer 103 No Je ffe rs P h 534-10» Carfa Hobbwa SIMPSONVILLE MOLMEN 02 4211 S p o iw o Rd Davta Hobbws MERRIMAC 11» W Kemper Roed SUN-W IN 46 A Welles Street 1408 S o U . 81 Ph 9356080 OMAHA GokWn S rp Hobbwa *3 8225 Ok) Seaward Georg# t Hobby Shop PH 513-74268» 551 Fa rvw w R oad *111 W7S63 Si Crow Ave Fox Run Mas PH 833-3058 DWA 22 Menmae Square Hobby Cooperative Supply A N C H O RA G E CEDAR RAPIDS CLEVELANOA»ARMA YORK MAOISON Fun For Art MILFORD PEABOOY 13225 I Stree t Tapco Engineering NEVADA National Hobby, me Hobby Craft Of Madaon. me 3001 O k) Seward M gnway Rado Active Hobbwa Enc Fucha Hobbwt » Oden· Roed 374 New Haven A re 1830 47th S t N .E S23 Ridge Rd Ph 7492450 S Hwy 181 68 Norththore Shopping Center L A S V E G A S F in d l a y N EW B E R L IN ANCHORAGE Farmer'· Martel Plaza PH 3934383 PM: 809222-2758 REVERE J J a Hobby Dan J " « Model Suppkes Hobbycrafl. Inc 1 PH 2038778200 COUNCIL BLUFFS SOUTH DAKOTA Danond Cenwr Ph. 3488815 Ton/· Hobby Shop 4072 S Maryland Parkway» 721 R ockw ell A ve A 8 ER 0 C EN Ave NEW MILFORD Bud a Hobbwa A C ra fa 00 Kim Bert Ave 800t Danond BVd NO LAS VEGAS FINDLAY KWm'a CWM Act Hobby Shop t33W Broadway WALPOLE Paterson Hobbws A C rafts VALDEZ 77 O tJ State Road DES MOINES Puaav CM Company to ts W taon Kvmdtog Hi B A B Hobbwa. Inc 3282 8 Civic Cenwr Dm· 515 Crystal Ave 104 S M4 Don'· HoOtMM N O R W A LK Hobby Haven RAPID CITY 838 EaM Street RENO FO ST O R lA W A U K ESH A Box 100Θ AT· Hobbwa 7872 Hickman Road R C A Kobbwe WORCESTER Mgh Swrra Mod·* G en · '» Hobby RW 6. B i 1270 P h 7 8 7 6 8 » A B C R C me ARIZONA 54 Chestnut HA Road MOLSTEN Ray a RC Speciatwa MESA Chuck'· Lawn A Used C ar» 953 W Moan· Lane Ph 8250098 248 E E a g W S L WATERTOWN 1441B E a st Mam S t W A T ER FO R D 12 Sherm an S t P H : 7576883 NEW HAMPSHIRE Th· Craft N Hobby House 520 EaM 2nd JACKSON WAUSAU Ere Fucha Hobbwa kftCHJQAN AUBURN 833 E Mam St Ph 8338218 Crystal Mai LaM A R S Prop Shop hoe i Hobby Land ANN A R B O R CT Hobbwa 127 Pearl Straw PHOENIX W A T ER FO R D Hobby Haven Rider'· Hobby Shop Tha Hobby B*nch No 1 Shore Line Craft· Aaport Entrance Hatay 75 S 40 Eaton Roed LAKEWOOO CO VIN GTO N 11SW Liberty MANCHESTER Wing· Hobby Shop. Inc M-H Supply BAWLF ALBERTA 8058 N I0 8 i Av· P h 005-1756 5 Hay·· Street Ph 712648-5080 BATTLE CREEK Ouean Cay R/C 17112 Detroa A ve P h 2216383 114 Sta r Shoppmg Cantar Afearta'a Lain at Airpofl PHOENIX DELAWARE MASON CfTY Mobbv House 780 Mavey S i PH 8258013 LANCASTER KNOXVILLE B o . 6 PH 3793853 Th· Hobby Bench No 2 WILMINGTON O n B R/C S U P P L Y 508 Riverside Dr Ph 9844105 NASHUA SWter’a Inc M A N Hobbwa CALGARY ALBERTA Parade· Vaftey Mai Brandywine 201 So . Vermont BATTLE CREEK 1918 ZebW y Road SERGEANT BLUFF Eric Fucha Hobbwa Plaza Shoppmg Cantar 1023 B ran d »*· R d P h 5 2 8 7 5 » Calgary Hobby Simply. Ltd 4650 E Cartua Rd JT Hobby Box 3179 S ztl ~8- aOMDA R/C Ertraa 1141 N M em orial Drive KNOXVILLE P h 9087200 825 Golden Ave CALGARY. ALBERTA BOYNTON BEACH Rie 1.60x288 Ph»434i02 N ASH U A M A N SFIE LD Ufce's Keys a Hoc*··· PRESCOTT CHARLOTTE John'· Hobby Shop 4011 Chapm an Hgrtw ay PM S Hobby Craft Th# Hobby Shop G a C Hobbwa S IO U X C IT Y Hobby Empoman 3460 W Boynaon Beach Blvd RC R oyal R rtg e Mart 15 N Mam PH 015677-1339 15*495 38*i S i N E 217 W Gurley Si MAPLE ME 10 MTS MftLET. ALBERTA CLEARWATER 3201 Vfcing Dr Ph 2558190 N EW IN G TO N KNOXVILLE PRESCOTT VALLEY Southeast Hobby S P W iT LA K E Enc Fucha Hobbwa Tanrwaaaa Mod* Hobbwa Valley Hobby Shop 5150 WarrenavW· C * Road 60» Oak Ridga Hwy P .O ( « 718 11433 u s to So­ Somt Lake HobbCraft Fox Fun Mai 8331 E M VdWy Rood 7 So Monroe Ph: Z786894 M A R IET TA PM 615-482-20» ROCKY MTN MOUSE. ALBERTA f t LAUDERDALE 1821 M B A ve P h 3 3 8 6 6 » COLEMAN NORTH CONWAY SEDONA R/C Hobbwa WATERLOO Fun Loft Hcbbwa O AK R O G E J B Craft· A Hobbwa. L k l Long'» A m o A Hobby Shop C-V Machma Co 220 Putnam B o . 5 » . - 50 Skew My Hobby Shop 8800 N University Or Bo b a R C Supply Rdga Handcrafta. me 4010 Sm th'· Corner Ph 282-1290 5812 W Se g n a w Road Kaarsarga S i MARION 205 Jackson Sq OUNCAM. B C FT M Y E R S 835 Sheerer Ave DEARBORN SCRRA VISTA (MM Order) SALEM Lew'· W hwtW S lo p A Hobby T E X A S Rte Broa RC Supply A Ac o m * Carl Wlaon'a C*a# Track. Ltd WAVERLY Joe * Hobby Center BIT a Hobby Bam Don & Etta · Hobby Shop R C Hobby H o u m 532 W Cenwr S i AUSTIN 10» B Canada Ave 3343 Fowler S i 7846 Wyonvng Ave Ph 8336587 328 S Broadw ay 831 C actu s W ren Lane FT P IE R C E 818 E Bremer Ave. VANCOUVER.eC EAST DETROIT MAUMEE P H 802-458-7877 Hobbyland USA 8929 Aaport B M ). S w 148 Joe * Hobby Canter JA M Trane A Hobbwa TUCSON 850 S 21 at S i, ϋηβ N JUNCTION CITY C O N RO E 17800 E- 10 M M P h 7338294 25» Parkway Plaza J A K h V IC T O R IA . 0 Cactu· Hobby JACKSONVILLE FARMING TON 3880 W ma 115 W 7th S i Ph 236-1877 PM 418633-2821 EM Royer Oek Hcbbwa fringe Park Hobby World Joe a Hobby Cenwr. me 4454 W S a a n c n Roed YUMA KANSAS CITY MOOLEBURO HEIGHTS P H 7 88 10 M 7273 103rd S t 35203 Grand Rwer Ave BRANDON MANITOBA Th· Hobby Ho u m R C Hobbwa E L PA S O PM 3134776288 GB Mafa Hobby Shop 507-E nd S i 5820 Stata Ave 22 GRAND RAPIDS 706 BartayChaate. Road 46886 HarcUM Ph 7581914 A R K A N SA S UBERAL Rom » Hobby Shop CLINTON FARMERS BRANCH FT . SM ITH Utter'· Bko A Hobby Shop 2065 28th S i S E Hobbwa ToGo 204 Mam S i Bold Hobbwa Inc Duke'· Model Airplane· Hobby Land 108 E . Seventh HOUGHTON LAKE N EO O ESH A 310 H ftray 31 N. R d g a P k u a PH 5192484220 101 Vakwood Vmag· She Ctr 5305 Towaon Av· 14530 S W 142nd Ave. Craftsm an'· Cove A Traongpoat MARL TON PM 3052384387 SAC NORTH CANTON PH 214-241-8482 FT SM ITH 5728 W Houghton Lake D> HI F ly HobOWS Aero Tech Hob Wee FORT WORTH Vawga RC Hobbwa MIAMI PH 5174226714 R oute 70 A Cropwsft Road Orange Bloeeom Hobbwa 531 N Mem Mon t Hobby Shop 7423 Hqjhway 271 S KALAM AZOO Mar Bon Square Snp Mai BURLINGTON. ONTARO 1975 N W 36lh Sneer NORTH CANTON 7241 G rapevine M^~ PH 501-8483701 Rider'» Hobby PM 6099836060 M odaW r'a Haven Skycreft Hobbwa me ORANGE PARK 410 Hen PH 817-2816921 LITTLE ROCK 3417 So . *--- MERCERVKLE 4258 Portage N W Ph 4996000 tat Plama Rd W A A B Hobby H o u m WICHITA H O USTO N STWfrtT· Ho u m οI Hobbwa LANSING PARMA Larry· Hobbwa 1478 P a rti Ave βφ Frank'· Hobby Cenwr RxJer't Hobby Shop 3408 S University Av· 2280 N Am «Jon Ph 8388011 118 Flock Road H n ch 'a Tram A Hobby I58F 19» E Ph 4497373 UALR Plata Shopping Center ORLANDO 1600 E Micmgen A ve POMPTON PLAINS COURTRlGHT. ON TARO Bob'· Hobby Center, me Sweetbnar Shopping Center 7882 Broedvw w Road HURST PM 582-8230 PH 5174856700 Hobby H U TOLEDO R oy'· Hobby Shop Plane Crazy 7333 Lake (Joderhril Road KENTUCKY MT PLEASANT LITTLE ROCK OWENSBORO 587 Rw 23 PH 8362077 The Hobby Stop Weal 1309 Norwood 428 · » H W ay. R f li ORLANOO Pom ia r c Modem R AN O O LPH 4558 Monroe Street PH 8873102 Sim · tkacounl H obbes Central Florida Hcbbwa. Inc Hobby Mailer JASPER 2119 S Summation Rd Carfa Hobby Cantar UPPER SANOUSKY K7TCHENER. ONTARO 9601 Rodney Par hem Ann·· 7 6800 W C olonial OrNe «311 X C a · Mode»· ft)"· Hobby Shop PO N T IA C 508 R W 10 P H 3664300 Fftaa C raft M odal C o CALIFORNIA ORLANOO 2008 Trtptatl S i Jim A Ken'· Hobby Shop 4 » N Mam S i R C Hobbwa R E D BAN K 14835 CM 53 R R3 IAREOO 1595 V cto rta S t N BAKERSFIELD Comma) Photo A Hobby. In c. PH 502-8839117 821 Huron M AM Hobby Center L O U B IA N A PM 419294-1712 Border RC Mode* LONDON. ONTARO 834 N M4* Street R O C H E S T E R 82 Whee Street 8401 W hit· L a n e Su aa 108 PE N SA C O LA BATON ROUGE WAPAKONETA 1112 Carte Ow None Flrte Craft Modal Co . me Jo · » Hobby Cam era, me ROGE FIELD Dad a Toy Shop LO N G V IEW 17» DundM S i E BAKERSFIELD Bob·'· Hobby h o u m Hobby Town· Campua Corner» Snp. Cv Regeftek) Hobby ΜΙΤΟΝ. ONTARO Van'· D ecount Modal Mart 6719 North W Street 3112 Cortege Drive - Suae A 123 W Augtaiza S t 1··»·'· Hobby Shop 105S Uvemow 508 Broad Ave PH 419736-2007 RC Ready Mode* 1029 B ake r Street PLANTATION BATON ROUGE 2728 GAmer Roed SAGMAW R IV ER O A L E YOUNGSTOWN ITS Mary S i BURBANK Zappakn Hobbwa PH 418075-1554 141 South Stale Road 7 Ortas·· TV Video Ctmc T A A Hobby Lobby 02 Hamburg Tump*· 6820 Market Street MISSISSAUGA ONTARO 3612 W . V e to ry BJvd PH 305581-0380 OOVHNOTON 806 N JWlerson Ph 3322631 PH 517-781-3000 WILLING BORO OKLAHOMA OOESSA Hobby Hobby, me PH 818842-5082 ST PETERSBURG Unde Sam · Hobby Shop SAGMAW X I N Hwy, 100. Suae Ε β OKLAHOMA CITY The Wmdaock Hobby Center 128 O uaan S i South COVINA Roger* Hobby Center Country Club Plaza Campbell a Hobby H o u m Cieetwood Shoppmg Center SC A R B O R O U G H. O N T A R O Covvia Hobby Canter PH 504-883RCRC 5858 S ta te Ph 790-0080 Bevarfy-Rancocaa Road 3600 N M acAithur 3519 N Otue National HoOby. h e 140 N C4rua P h 331-1910 HARVEY Giant Shopping Canter W Boy'· World οI Hobbwa NEW MEXICO TULSA PH 91538363» 1075 Law rence A ve E G LEN D A LE SA G fN A W ALBUQUERQUE 2127 So. Ridgwood Ave Lapako Square Suita No 8 PORT IAVACA PM 4187551788 Robm 'a Hobby S e w * · Tart » Hobbws A Racew ay Vaftay Hobbwa W1LLOWDALE. ONTARO PH 904-7818780 1545 Lap aico Blvd 4423 E- 31W S t The Plena Shop 1844 W G lanoaks 3270 Bay Roed 4622 4th S I. N W P h 3454888 TULSA Keith'» Hobby Shop TALLAHASSEE PH 504-3826822 H A W TH O RN E PM 517-7993900 N EW YO R K Wing· N Thing* 52» Yonge S i PM: 2224721 Pam A Alan's Hobbws MA NOEVIL L£ SAN ANGELO Chuck'· Modal Shop UTICA ALBANY 5153 So Peorw PH 7450034 Cactu· RC Hobbwt CHARLOTTETOWN. P E 1 14005 Hawthorn# Blvd 11984 Capital Crete N E Mercury Hobbwa. Inc Handaraon a Fam ty H OREGON 3122 Sherw ood W ay Jan’a R/C Supply LAKEW O O D TAMPA R l 8 Box 734A P h 892-7204 2441 Auburn METARIE 67 E i change St CANBY SAN ANTONIO 1» Naeaau St Ph 3881655 Hobby Warehouse Chariw'a Owoount Hobowa WARREN BR O O K LYN FLEURE'MONT OUEBEC 7530 W W aters Ave. Hobby Hut Hobby Shop CW ylon Mobbw· 4118 E South Sesst Prop Shop Hobbwt Brooklyn'· Modal Masters 4 » S E 1W Ave 5707 E Mobud Slwr-Mobby LANCASTER PH 8138824007 825 Oawd D ive 23328 Van Dyke PM 504-7334828 1192 O ravesen oMecfc R d C O R V A LL IS SULPHUR SPflfttGS 10» 12* Ave Non) TAMPA YPSt-A N T! Ph 7167436700 Trunpa Hobbiw Farmer» Btmdrwa 5 HobbWe Hudson » RC LAVAL OUEBEC 3 W / ι I R kMt' s Hobby CANANDAIGUA 2401 N W Kings 5 » Mama Onve Carfa Hobby Shop. Ltd NAPA 4839 E Broedway Amancan C ie e a c D ev . me. 4035 C a rp e n w Roed Finger Lakes Hobby Tknberh* Shoppmg Cenwr WACO 15» Cure Leber* BVd Carfa Hobby Shop PH 8132483314 1314 U S 1 « Norm PH 3188436554 222 S Mam P H 304-7500 EUOENE Beverty Maw Mod* Shop MONTREAL. OUEBEC 2532 Jefferson S i VEROBEACM BLOOMINGTON M A M E CHE E KTOWAGA Eugene Toy A Hobby 3421 MwnortW Drtvw Can-A* Hobbwa PH 2283833 Jorty'i Hobby A Craft Center Field's Hobby Center 32 East tlth Ave WESLACO 58» Goum Blvd Oueat NORTH HOUYWOOO 1505 20th S t BATH Southtown Shopping Center The Hobby Shoppe 3523 Union R d P h « 1 6 4 4 0 PORTLAND Stontord R C Hobby Shop PH 514-3» 3 5 » WINTER SPRINGS DETROIT LAKES ELM SFO O D Florence Hobby Center. Inc 9t From St 2 » S . Τ·χμ ST GEORGES BEAUCE. OUEBEC 12420 B FretTa Hobbwa A ndy's Hobby Shop 4503 N In ia rsta w A ve Place Bureau Enr 420 W Sla te Road 434 FAYETTE NORTH FUDGE Randolph Road PH 847-3073 38 E Mam Straw PENNSYLVANIA NO FERRIS BURG 12515 lent e ve e at v * e da Smith Brothers G EO R G IA Tom a R C Hardware LITTLE CANADA (St Paul) R FC 1. B e . 2280 R O C H E S T E R BATH Y endow'· HOUM o l R C VTLLE ST LAURENT OUE 8841 R see d s BNx ATLANTA rkib Hobby Cenwr Dan » Craft· A Things Ock Wetzel» Hobbwa Briar V«ta Lawn Mow* PITTSFIELD RouW N o. 7 SACRAMENTO 82 M m twaou A ve P h 490-1875 352 Empaa Bkrd Ph 65463» 514 E Mam P H 8376681 802 Decarw PM 74462» Sal·· A Sense· Mallett» R C Plane· MANKATO R O C H E S T E R Ric h m o n d REGINA. SASKATCMAWAN 1857 Lavw ta Road Don a Hobby Co Edmund'· Hobby Shop Aero Specoftwa P H 8338741 W A TERV 1 LLE The Hobby Center 424 S Front S i P H : 587 1330 1521 M l Hope A ve Ph 442-6430 5014 S iw io n R oad Tha Shop· at W4iow Lawn 2 » Shannon Road AUGUSTA CHI Piper Redo Control MINNEAPOLIS Rive Ridge. Vaaaaftoro S Y R A C U S E EVANS CITY W A SH M G T O N SASKATOON. SASKATCH Otter Creek Hobbwa Jo·/» Hobby A Craft Cenwr W a ft '· Hobby A C raft Cranberry Hobby Depot RC Hobby Work) 2625 Dean· Bridge Road Route 3. Box 1980 B E L L E V U E SACRAMENTO Apache Plaza 4300 W G anesee S t Cranberry Gardens Plaza 1 » · 2X1 Ava C North HAWAII MARYLAND RC Mod* Shop RFC Country Hobbwt RICHFIELD NORTH CAROUNA 20327 Parry Highway Maacamp Centre PH 8524775 HONOLULU BALTIMORE 14010 N E 21 at S i 4101 Pow er bin R d ,U n« A Hub Hobby Cenwr ASHEVILLE GETTYSBURG PM 508747-0014 YORKTON SAN FRANCISCO The Storwim gh C ycle A Hobbwa. me 8418 Perm A ve 8 0717 York Ro«) Carokna An. Craft A Hobby Q H bart't Hobby Shop BE LUNGHAM R e d o Conte·· Hobbwa Franclacan Hobbwa 1413 T en *) Avenue ROBB IN SCALE 128 Swannanoe River Road Ave 221 Roaiyn Ave PM 7834747 OAHO GERMANTOWN 2» Hobby Hrve 1820 O cean Avenue Hub Hobby Comer BURLINGTON HUMMELSTOWN TW IN F A L L S Fax Chapel Hobbwt 703 W Moby Ph 7 3 4 4 0 » SAN LUIS OBISPO 4114 Lakeland Ave N R C Hobby Workahop/Racaway The Hidden Hangar MT VERN O N NORFOLK. NR17 IDG S L O Hobbs» Aero-lromea Model Sim ply Co 19709 Fred erick R o m ) ST PA U L M O O LET O W N 1358 S C hurch P h 2286809 145 S Roomers town Road Performance RC 1358 Madonna Road 330 L o c u m S t e e l Joty'a Hobby A Craft Center CH A R LO TT E Caeton Aaleborougn lU N O tS Larch Lane Hobbwa MARS 1501 Parker Way. Surta 3 SANTA MONICA Sunray Shopping Canter Action HobbW· NEW ZEALAND BEU.VXLE 18 Larch Lana PH 20842*2750 E v e n 's M odel Shoo 2127 Hudoon Road 2619 S Blvd Ph: 527-25» 178 M ars VaW ncw R ow ) HASTINGS Waal Srda Hobby PH3014734587 PUYALLUP 1838 O cean P a r t Pn.452-2720 W . 8T PA U L GOLDSBORO MONONGAMELA Heating» Mod* Supptui SANTA ROSA 2829 Wen Meet Street W A LD O R F Jofty'a Hobby A Craft Corner Hcftmgaworth R/C Shop R e d 's M odel P la n e S uppiws 1 4 » E Mam S u m D 523 Frederic* Strew Toy A BLO O M IN GTON Doug'· Hobby Shop 1891 S Robert Wakiorf Shopper’s Work) R W 14 Bx 93 P h 7 3 5 4 0 » 147 Taytor R un R o w ) SEATTLE THE NETHERLANDS HENOERSONVELE M O R R lS V U L E Webawr Hobby Shop D EN B O SC H P H . i 8)6 N Mein Si WESTMINSTER B o b b y's Hobby Lobby OMN RD The Hobby House Z A Z Hobbwa A Crafts 1118 N 183rd P Toenwn M odal Shop O ftC A G O The Mod* Source 1211 Ashevirt· Hwy Ph 8 8 2 6 8 e3 Mmdertyoedersaeaar » Stamen Hobby Shop « Ε Mam S t 229 Plaza BNd SEOUM FV->fl MASSACHUSETTS n o 8. n m S t H IG H PO IN T 022 Pannabury Plaza Cantar Fred'· Hobbwa and Guns PH 079140104 24208 4734 N M ilwaukee A ve PH 8012344170 BOSTON Berrse’s Craft A Hobbw a. me READING 349· W Waehmgion N O R W A Y CRYSTAL LAKE 2291 Engkah R o w ) kon Horse Hobby House PO R SG R U N N Frank'· Gam··. Toy· A Hobby Enc Fucha Hobbwa SPOKANE G R A N D V IEW KIN G « S o u t h 8d i S t B S Hobby Import 111 · 113 North Mam S t 20 Tramont St ΘΑ Θ Hobbwa 23132 Valencia Blvd FloUow Hobbwa Kmg R C PH 8154588247 BURLINGTON R EA D M O E6 0 7 Franc· P * 487-2122 L y r w 3c PH 8052586895 700 Blu e R d g a ExL SWEDEN E A ST M O U S E Enc Fucha Hobbwa Ftve Fork· VMage Snp C* O tfs Hobbwa SPOKANE VA N N U Y S PM 0197816471 PH 819863-58» 536 N lOthSt RC Hobbwa at Spoken· S671 02 MARNOSAND Tony'· Hobby 6 Key 830 IS Ave W 11049 DEALERS: Write For Details On How Your Name Can Appear In This Column • f r o n t

BUI Latest version of Skip Ruff's R/C Martian Spaceship sports triple tail fins for much improved sta­ bility. Two little ones are F/F gliders. More in text.

N o r t h r o p ' * schedule from two weeks behind to two the original fin area, as shown on one test weeks ahead. However, this maneuver is ship, Skip opted to increase the vertical fin workbench not recom mended in the business world, as area by enlarging the tip chord of the stab it cost us the loss of one month's income and adding tip fins. R/C flight tests show a • As occasional ly happens when the work from this publication. dramatic increase in stability. The glide is load outweighs the manpower at RCMB Let us hasten to remind subscribers, that still extremely steep without power, how­ INC, something has to give. Most times, with one deft maneuver at the computor ever, now that control is better, Skip finds he some extra daily hours and/or weekends keyboard, all subscriptions have been ex­ can add power just before touchdown to w ill solve the problem, but in rare in­ tended by one month! Incidentally, the de­ flatten the glide angle, as originally stances, stronger measures must be taken. cision to make this adjustment occured at speculated. A combination of deterrants focused in on too late a date in production to include an The civilian population of Taft, Califor­ us during the recent holiday and year-end explanation in the com bined issue. nia, a leading U .S free flight site, is still a lit­ season w hich causecj, one of our maga­ INTRODUCING tle restless when stories get back to town zines, this one, to slip behind its production Another change in the last M o d el B u ild e r about the strange object in the skies schedule by two weeks. also took place on such short notice that overhead! W h at happens next is reminiscent of the there was no time for an explanation. FORTIETH ANNIVERSARY relentless wave after wave of broomsticks in Our March/April issue featured a new The Fox engine in the photo is kinda spe­ Walt Disney's classic "Sorcerer's Appren­ "Chopper Chatter" columnist, James cial. It marks the 40th anniversary of the Fox tice," as the publication deadlines keep Wang. Actually, "Chatter" isn't really a fit­ .35, the world's most copied model airplane coming at an uncontrollable rate of one a ting tile word for James' writing. A better de­ engine. The anniversary engine, identified month, no matter what (actually, two-and- scription might be "technical efferves­ as 13500 35 Fox Stunt, retails for $59.95, in­ quarter a month, when counting all three cence." This young gentleman is bubbling cluding a m atching Fox muffler, and the magazines)! As with Mickey and the over with enthusiasm and investigative broomsticks, we have no control over the knowledge on the subject of helicopters. A march of time or the demands of our news­ few moments of conversation with him, stand distributor's schedule, so the only and you're totally ready to believe his com­ recourse was to combine the March and ment in the introductory paragraph of his April issues. This action instantly moves our first MB column, ", . . I already have tons and tons of R/C helicopter ideas packed in my mind, to the point my head is about to explode." Looks like our biggest problem with James will be controlling his desire to turn MB into an all-helicopter magazine! James, in his first colum n, has already outlined his qualifications in theory and his practical background in the field of full-size and R/C model helicopters. We also note that he has the necessary writing skill for com m unicating in non-technical terms, yet injecting just enough theory to keep our readers' minds on their toes. W e look forward, as we're sure he does, to the day his byline will be changed to Dr. James Wang. REPORT FROM MARS The saga of the R/C Martian Space Ship Our Plug Sparks columnist for 15 years, John continues. This month we see the latest re­ Pond, received a Distinguished Service Award at last year's Old Timer Nats, in Vincennes, visions on the R/C model, based on Skip Indiana. Jo h n is largely responsible for the Ruff's experiments with the smaller free Close-up of the logo detail on the new 40th A n ­ tremendous growth of O.T. activity today. flight foam models. Rather than doubling niversary Fox .35; see text.

6 MODEL BUILDER "hanging ribbon" engraving on the crank­ phone (602) 855-6900. the fuselage, from the engine back to the case to commemorate the occasion. Our P E A N U T M O D cockpit. In Benno's plan, this was shown as wandering columnist, Stu Richmond, sent If anyone may have contemplated build­ a piece of delicately hollowed out blue the photo, noting that when Duke came out ing that complicated 1908 Kapferer III by foam. Relax, it's just flat. There is, however, with the engine, he matched the mounting Benno Sabel, published in our August '88 a tapered wind deflector starting at the front holes of the then dominating engine, and issue, here's a mod that w ill take away some of the cockpit and tapering to flat at the next smartly added a bit more displacement to of the pain of building it. Benno has discov­ station forward. Its maximum height is get a bit more power. . .with outstanding ered through additional research that there about the same as the former curved deck success! was no curved deck on the top surface of shown on the plans. · THINGS TO DO Faced with still another less-than- satisfactory site for indoor free flight at the A M A Nationals for 1989 (A low ceiling with obstacles!), the National Free Flight Society has again decided to conduct its own In­ door Championships. As pointed out in a letter from NFFS president, Tony Italiano, the Championships w ill take place on June 1-4, 1989, at the East Tennessee State University M IN I-D O M E, Johnson City, TN.

* * * The 1989 Reno National Championship Air Races, the 26th annual, will take place on September 14 through 17, 1989. Tickets are available through BASS and Ticketron agencies, but we understand that hotel and motel accommodations are already sold out. It appears that everyone signs up for the next year before they leave Reno. Unless you are able to pick up a cancellation, have a friend w ho lives in Reno with an extra bed ADVICE FOR THE PROPWORN or space for a sleeping bag, or you have — By Jake "connections," you'll just have to read about it in Model Builder. Felix has a room! D e ar lake: Good luck, and let me know how you * * * I have been having trouble with some­ make out. Have you tried R/C Combat? An organiza­ thing you might be able to help me with. Jake tion called W.A.C.O (World Air Combat Or­ A ll o f the plans that I have seen are W H IT E ♦ * * ganization), at P.O. Box 111, Jasonville, IN in color. I keep losing track of my (also 47438, plans to have its first annual cham pi­ D e ar lake: white) hinges and things. I learned to fly onships on October 9, in Jasonville. It's well known that you are a legendarily with the "Tossette" from january 1986 bad pilot, but I've also heard that your driv­ Basically, the aircraft specs call for a .21 Model Builder even with its white plans. maximum engine size, two operating ing isn't any better. Any comment? Somewhere around my latest project I have Patrolman in Petaluma servos allowed regardless of available chan­ a white yardstick, it's been lost for months. Dear Patrolman: nels in radio, and a maximum fuel capacity Seeing that you are well known in the in­ of two ounces. N o restriction on aircraft de­ That's entirely untrue. I am an extremely dustry perhaps you could influence all the safe and thoroughly law-abiding motor ve­ sign or control systems used (except two kit manufacturers and plans printer people hicle operator. The only ticket I ever servos only). Matches are flown for five to slightly color the paper that they use. received was for doing 0 miles per hour in a minutes. One point per second for air time Grumpy Roy in Columbia, Missouri no parking zone. and 100 points per cut, automatic win for Dear Grumpy: Jake leader cut (string leader) or "Kill." I know just what you mean. I laid a sugar Sound like fun? Write for more details at cube down on some plans next to a cup of * * * the above address. Control line combat coffee, and then I couldn't find it for two D ear lake: fliers w ill know who's at that location! weeks until a trail of cockroach droppings Not too long ago, I tried to improve the * * * led me to it. Lucky for me the roaches didn't endurance of my free flight model by filling Novem ber 10, 11, and 12 are the dates for leave white droppings. the Monokoted wing and tail surfaces with the Giant Scale Schneider Cup Reenact­ I have found a couple of solutions that hydrogen. The weight did go down a few ment at Lake Havasu, Arizona. Chaired by don't require bothering the manufacturers grams so I thought it might work. But when Bob Martin, of Bob Martin R/C Models, this about the color of their plans. One way to I went to light the dethermalizer fuse, the promises to be a giant affair in addition to elim inate white plans is to wear tinted sun­ model blew up and perforated the timer's the scale size of the models. The eleven glasses when you build. Rose-colored h at. I was disqualified for use of a races, which began in 1913, and continued works good and makes everything look hazardous material, and I had to buy the with occasional interuptions, such as pink. man a new hat. Guess I won't try that again. World War I, until 1931, brought out some Another excellent alternative, and one Foiled in Fresno startling and developmental aircraft that that I discovered quite by accident, is to Dear Foiled: have established their niche in aviation his­ spill something (preferably greenish) on the You could have saved yourself a lot of tory. Scale R/C Modeler magazine is the plans. This works so well that I have taken to time and trouble if you had just lit the event sponsor, and has carried several arti­ tossing a mug of Cup-a-Soup on any new set timer's hat. That way you would have still cles about the com ing affair. O u r cover this of plans that I get. been disqualified, you would have still had month depicts one of the classics, the Cur­ Finally, consider taking a slide photo of to buy the guy a new hat, and no one would tiss R3C-2 flown to victory in 1926 by Jim my your plans and projecting it onto a blue have been endangered by the hazardous Doolittle, and the firstto break the 200 mph wall. This eliminates the color problem, but hydrogen. Next time you get the urge to do mark. For more information about this objects you lay on the work surface while something stupid, call me first because event, write or call Bob Martin at 1520 "C " building have a very strong tendency to roll Acoma Lane, Lake Havasu City, AZ 96403, off onto the floor. Continued on page 100

MAY 1989 7 OVER THE COUNTER A ll material published in "Over the Counter'' ‘Ψ is quoted or paraphrased from press releases, Ψ furnished by the manufacturers and/or their advertising agencies, unless otherwise speci­ fied. The review and/or description o f any \ W W W:M\ product by MB does not constitute an f e i v f x f T:>* *'v* endorsement of that product, nor any assur­ ance as to its safety or performance by MB. \UWW a t 'M c.ij& ir- ,d

• Ace R/C sent us info on a number of new cleaner can at least make it easier and The folks at Top Flite have decided to go products, threeofw hich we'll tell you about quicker. Blue Magic is nonhazardous, non­ one better on their popular antique-looking this month. First is their new FlexMaster 16 flammable, biodegradable, odor-free and "Elder" sport R/C ship by making a biplane gauge wire designed especially for electric best of all, it's cheap! Sig claim s the stuff version, which should be on your dealer's powered models. Made of 665 individual dries without streaking and is completely shelves by the time this issue hits the stands. strands, this w ire is extremely flexible and safe for all painted finishes and plastic iron- Not much information was supplied on the offers far less resistance to the flow of cur­ ons. The price? A 16-oz. trigger spray bottle kit itself, so we can only assume that it is as rent than smaller wire. FlexMaster comes in sells for $2.95. Refills are available in pints, complete and of the same high quality as packages of two (red and black) 24-inch lengths, for $3.49. "Add-A-Trickle" is a nifty device that wires into the leads from your overnight R/C sys­ tem charger and lets you switch to a trickle charge rate (10 ma) after the normal over­ night charge cycle is finished. At such a low charge rate your batteries can be left on charge indefinitely without damage, keep­ ing them Always topped off and ready to go on a moment's notice. Two versions of Ace's Add-A-Trickle are available: one has single input and output leads and sells for $6.95, the other has dual leads (for transmitter and receiver) and retails for $9.95. Lastly, to try and clear up some of the con­ fusion surrounding the 1991 R/C frequency situation, Ace has put together a two-hour video that explains the whole thing in de­ tail from beginning to end. Radio experts Tom Runge and Fred Marks talk about the technical aspects, and Bob Underwood ex­ plains the AMA's viewpoint on the subject. In all, this is a very valuable educational tool that both individuals and clubs alike Top Flite's "Elder Biplane," two-winger version of the popular Elder sport R/C model. should own. Price of the video is $26.95. quarts and half-gallons, the latter going for the rest of Top Flite's line. W e can tell you, From Ace R/C, 116 W . 19th St., P.O. Box only $3.50. Certainly worth a try, especially however, that this is a pretty big model, with 511, Higginsville, Missouri 64037. since it comes from one of the most re­ almost 1,500 square inches of wing area. * * * spected names in modeling. Other specs include a span of 65 inches, Cleaning the messy gunk and crud off of From Sig Mfg. Co., Montezuma, Iowa length of 50-1/4 inches, and a flying weight your model at the end of a day's flying is 50171. of 7-1/4 to 8-1/2 pounds. Engine recommen­ never a fun job, but Sig's new "B lu e M agic" * * * dations are a .45 to .75 two-stroke or .60 to .90 four-stroke. In all, the Elder Biplane is an attractive model that should prove to be very popular with R/C sport fliers. From Top Flite Models, 2635 S. Wabash r u I Ave., Chicago, Illinois 60616. * * * p . # y ------Tx Rx There has been a lot of talk lately in Old TRICKLE Timer circles about the new 1/2A Texaco motor that Cox has developed for this fastest growing of all O.T. R/C events. For the NORMAL uninitiated, 1/2A Texaco is a duration event open to any recognized Old Timer design, — ADD-A-TRICKLE J scaled or otherwise, powered by an essen­ tially unmodified Cox reed-valve .049 with an 8cc integral tank, and swinginga prop of 8-inch maximum diameter. A "m ax" flight is 15 minutes. Ace's 1991 R/C frequency video (above) and Obviously, with only a given amount of "Add-A-Trickle" charging accessory (right). \ fuel, the best approach is something of a 8 MODEL BUILDER compromise between power and fuel econ­ omy, and that is the idea behind the new Cox engine, known officially as the Texaco .049. The engine has been detuned some­ what as compared to the widely used Black Widow, thus increasing the engine run time. Performance figures supplied to us are 9,100 to 9,600 rpm with a 7x34/2 prop, with a running time of five to six minutes. The engine is easily recognized by its black crankcase and red tank; also, the engine sports a plastic tank back and a hex-shaped prop driver with a centering boss. Also new from Cox is the Silhouette, an ARF R/C glider featuring molded foam fly­ ing surfaces and molded plastic fuselage. Span is 55 inches, the airfoil is an Eppler E- 214, and the w ing loading can be as low as 7.9 oz./sq. ft., depending on the radio used. The model is available both with and with­ out a two-channel R/C system, and both versions are supplied complete with a High-performance sport/fun-fly model from Midwest, the "Hots II." high-start. From Cox Hobbies, 1525 E. W arner Ave., and reviewed for an upcoming "Products in the massive FF-320, a flat-four four-stroke Santa Ana, California 92705. Use" article. very similar in appearance to the familiar

* * * From Carl Goldberg Models, 4734 W. FF-240— just bigger, is all. At 3.2 cu. in. dis­ "Mirage 550" is the name of Goldberg's Chicago Ave., Chicago, Illinois 60651. placement (over 50cc!) this is the biggest latest kit offering, a 54-inch span racy look­ * * * engine O.S. has produced, and we have to ing high-wing design aimed at the 05 size Great Planes sends word on two new O.S. assume it has the increased power to electric sport/trainer market. This is an all­ engines now being made available to U.S. match. balsa kit and features an exceptionally com­ modelers. One is the O.S. .32 F ABC, which From Great Planes, P.O. Box 4021, Cham ­ plete hardware package, which includes is based on the popular .32 F-H A BC paign, Illinois 61820. the motor, pre-wired switch harness, prop, helicopter engine. Features include dual * * * spinner, special lightweight wheels, and ball bearings, Schnuerle porting, and the Emil Agosta of Dry Ridge Models is offer­ formed plastic cow l and wheel pants. Addi­ proven O.S Type 3 R/C carb. Output is ing plans fora 1/4-scale model of the popu­ tional items required are a six or seven-cell claim ed to be over one horsepower. If lar "Spacewalker" homebuilt (see his ad Ni-Cd pack and charger, and of course a you're looking to give your sluggish .25 po­ elsewhere in this issue). Something not two or three-channel R/C system. We wered model a real boost you'll want to take mentioned in the ad is that the plans outline received one of these kits (which looked a close look at this new powerhouse from a few suggested power and design combi­ very nice, by the way) along with the press O.S. nations that w ill let you tailor the perfor­ release and have since sent it out to be built At the other end of the size spectrum is mance as you see fit. Slow, scale-like flying

New from Cox, the Texaco .049engine (above) and "Silhouette" R/C glider (right).

MAY 1989 9 Latest from O.S., the giant FF-320 four-cylinder four-stroke (above) and .32 F ABC engine (left). can be had by using a .46 two-stroke and a able and is filled with all sorts of interesting are all included; radio, motor battery (six or non-scale 4415 airfoil. Use the same wing goodies. The Hi-Max four-stroke engine seven cells) and charger are up to the buyer and a .61 two-stroke or .90 four-stroke for shown in one of the photos is a good exam­ to supply. Going price on the Aero-Sprint is zippier performance. Using those same ple. These are English-made engines of .91 $149.95. size engines and switching to the scale and 1.20 cu. in. displacement; going prices The Aero-Tiger, in contrast, is an all-wood 2412 airfoil will make the Spacewalker fly are $269 and $319 respectively. No infor­ kit (the Aero-Sprint is also of wood con­ like a pattern ship, and for the real hot-dog mation was given on the internal construc­ struction, by the way) featuring machine cut pilot, the plans detail the construction of a tion features, however the performance and sanded parts. Two versions of the Aero- clipped-wing version of the plane. Variables specs rate the .91 at 1.45 bhp at 9,000 rpm Tiger are available, the basic kit selling for in incidence and dihedral for all types of and the 1.20 at 2.05 bhp at 9,500 rpm. Both $59.95 and the deluxe kit for $149.95. performance are also spelled out on the engines feature built-in radial mounts. From Parma International, 13927 plan. Refer to the ad for plan prices and Another neat item shown in the catalog is Progress Parkway, North Royalton, Ohio availability of fiberglass cowls and wheel the Como Microturbo 2 hand-held drill/ 44133. pants. grinder. The drill itself is attached to a varia­ From Dry Ridge Models, 59 McCurry ble speed AC/DC power supply transformer Rd., Weaverville, North Carolina 28787. via a lightweight cord. Four different size * * * collets and 16 tools are included, and Midwest Products has a new version of everything packs up neatly into a compact the "H ots" high-performance R/C sport/fun- carrying case. Also, since the drill uses a fly model called, strangely enough, the D C motor, it can be used at the field simply "Hots II." Design improvements over the by hooking it up to a battery. Price on the earlier Hots include a one-piece removable complete M icroturbo 2 drill set is just wing, larger fuselage for easier radio instal­ $69.90. lation and access, a larger fuel tank com­ Hobby Lobby's catalog #13 is available partment for longer flights, and a fully free for the asking. Call or write Hobby cowled engine for a more streamlined ap­ Lobby at 5614 Franklin Pike Circle, Brent­ pearance. Specs on the airplane are: 45-1/4 wood, Tennessee 37027, (615)373-1444. inch span, 436 square inches of wing area, * * * flying weight of 3-3/4 to 4-1/2 pounds, and Parma International, one of the biggest an engine size range of .40 to .45 (two- names in R/C electric cars, is getting started stroke) or .40 to .50 (four-stroke). Suggested in the R/C electric airplane field by in­ retail on the new Hots II kit is $89.95. troducing two 05 size high-wing sport/ From Midwest Products, 400 S. Indiana trainers, the Aero-Tiger and Aero-Sprint. The St., P.O. Box 564, Hobart, Indiana 46342. latter is an ARF, requiring only assembly of * * * the major components and radio system. Hobby Lobby's catalog #13 is now avail­ Motor, folding prop, spinner and wheels

Como Microturbo 2 driil/grinder (top) and Hi- Max four-stroke from Hobby Lobby.

10 MODEL BUILDER IMS ATLANTA Preview A brief review of the premier 1988 model show indicates a little of what you can expect to see this May.

• About a month from now, that is if you model railroads, and modeling accessories. microfilm, followed by electric powered have just picked up this issue as it hit the A huge car track (60 x 110 feet) w ill be avail­ control line scale models, featuring carrier newsstands, the Second Annual IM S M odel able for live demonstrations of all types of landings, all capped off by Tony's exciting Sport and Hobby Show (IMS Atlanta, for R/C cars and motorcycles. . .even the big flight demonstration of the seven-foot span short) will be opening in Atlanta, Georgia. quarter-scale gas powered models! The 32 x antique Farman scale R/C model which To be exact, the show takes place on Friday, 48-foot boat pond w ill provide plenty of weighs a mere 25 ounces! In addition there Saturday, and Sunday, M ay 12,13, and 14, at aquatic action, and there will also be a will be continual flying of radio controlled the Georgia World Congress Center, 285 In­ skeleton crew from the Blacksheep Squad­ balloons and blimps. ternational Blvd., N.W., in downtown ron under the direction of Burbank, Califor­ Don't com e to the show on Friday unless Atlanta. nia hobby shop owners, Tony and Addie you are in the hobby trade as a dealer, distri­ There will be model manufacturers from Naccarato, who will again head up the butor, importer/exporter, manufacturer, all parts of the U.S. on hand to show their twice-a-day live demonstrations of free etc., with business card and personal I.D., latest products, including radio controlled flight gliders and rubber powered models, as this is the Trade-Only day for industry model aircraft, boats, and cars, R/C systems, including indoor HLG, Penny Planes, members only. The show goes public on

Dorothy Adler, of New York, builds a Delta Airtronics' Jack Albrecht looks happy with Dart. Free plane, free instructions to anyone. Donna and Tom Runge in the Ace R/C booth. the PCM Vanguard.

MAY 1989 11 •iumuaaiacpuKi nwiitest ElECTNICI SAILPLANES

’ ‘TESSW m f v ^*-fi

Ted Davey, Davey Systems, with the electric-powered Eindecker. Walt and Tim Schoonard are justifiably proud of their X-cell heli­ Combo kit with electric motor is bargain. copter.

M RC 's Peter Giammarinaro shows Clod- Hobby Stores Distributing, East Hartford, John Sermos, Stamford, CT, has the very buster monster truck to interested dealer. CT, on hand to check the merchandise. best connections. Saturday and Sunday, starting at 10 a.m. category, please! IMS show flyers are availa­ which models will be accepted for the each day, and closing at 6 p.m. and 5 p.m. ble at hobby shops in most of the Southeast, competition, including Thursday and respectively. Remember, selling is permit­ giving more details, or you can call (714) Friday. ted by exhibitors, at theiroption. O f course, 645-8830 for more information. Also, by Repeating last year, Delta Airlines' Spe­ trade members are welcome on the public mailing an S.A.S.E. stating what you want, cial Meetings Network is again offering its days too, but with the increased people- we will send you copies of the Model Entry personalized services for the Atlanta IMS traffic on these days, it's kinda hard to talk Form, which you can fill out and turn in show. Provisions have been made to afford serious business with the exhibitors. with your model when you bring it to the a 40 (forty) percent discount off Delta's Modelers are invited to enter the free show (do not mail filled-out form back to domestic full round trip day/night coach static model competition, to win nice us). M ail your S.A.S.E. to: International fares, including Alaska, Hawaii, and Puerto trophies or ribbons. There are 48 model M odeler Show, P.O. Box 10127, Costa Mesa, Rico. In addition, a 35 (thirty-five) percent categories to enter, including 19 R/C air­ California 92627-0031. W e w ill accept discount off Delta's full round trip day/night craft, six R/C boat and ship, six R/C cars, machine copies of the form, in case you coach fares will be offered for Canadian three control line, eight free flight, two have more models to enter or you wish to travel. For all of the above, reservations and rocket, and four assorted plastic, plus Best supply some for your friends. Forms will ticketing must be made a minimum of of Show. You can enter as many categories also be available to fill out at the show. The seven days in advance. Any changes to the as you wish, but only one model per flyer explains the days and hours during outbound reservations must be made with

Mike Sriver's steam powered R/C launch cruises by as small R/C sub­ Some of the 1/4-scale sprint cars that provided lively demonstra­ marine stays clear. tions during the show.

12 MODEL BUILDER Peanut-scale rubber powered model sits on Electric powered R/C racing boats provide Addie Naccarato launches the 7-foot span the seemingly large trophy it won. lively action in the 32x48 pond. R/C electric-powered Farman for son, Tony.

Alabama modelers check out the Byron P-40 as A l Tuttle thinks about Robert Gorham, world class R/C helicopter pilot, proudly displays an answer to the last question. the GMP Legend. seven days advance notice of the new flight. speak with Delta's Special Meetings facets of the R/C hobby w ill be on hand to Changes to the return flight may be had at Network. talk with the spectators and answer ques­ any time. There are no penalties for 2. Refer to Reference File Number tions which they are certainly more than changes or cancellations, when using these K14090. THAT'S IM PO RTA N T! qualified to handle. At the time of this writ­ discount fares. 3. Valid dates of travel are M ay 7 to M ay ing, National and World Champion Dave A 5 (five) percent discount is also availa­ 19, 1989. Shadel will be representing Pylon Racing, ble to you on Delta's domestic published Delta is open from 8:00 a.m. to 11:00 the one and only Dave Platt w ill hold forth excursion fares, including instant savers. If p.m. Eastern time to receive calls for mak­ in Scale, R/C Helicopter pioneer Horace you elect to use the 5 (five) percent discount ing these reservations. Call soon, and don't Hagen will answer your questions on chop­ off any excursion or instant saver fare, all forget that File No.K14090. pers, R/C Soaring cham pion Brian Agnew rules and conditions of the fare w ill apply. Finally, a special treat for modelers is be­ will be there to talk about silent flight, and In all cases, seats are limited, so you are ing offered this year, co-sponsored by A M A though the experts are still to be chosen, encouraged to confirm reservations as soon and the International Modeler Show (See electric power and pattern flying will also as possible. To take advantage of these fares, why we use IM S?). It's a presentation of the be represented. Don't miss this chance to follow these sim ple rules: Super Stars of Radio Control. Special go one-on-one with the best! 1. Contact Delta or have your travel booths w ill be set up near the A M A display It's all happening in Atlanta on M ay 13 agency call (800) 221-1212 and ask to in which top modelers from the various and 14. Y'all come on down y'hear? ·

Between Patty Violett, the Viper, and Marcia (Violett) Jones, the Bob Hazel Sig-Hester, Hall of Famer, waves from the cockpit of her Space- V iolett booth offers a super visual display. walker. Bob McDaniel's "1/4-scale" Ni-Starter ready to fire up engine.

MAY 1989 13 R s

X

The circuit used to determine the value of dropping resistor Rg. In the first example discussed in the text, E is 9.6 volts and R|_ is an LEO . In the second example, E is 2 volts and R|_ is a glow plug. An ammeter inserted at X would indicate the circuit current.

we? Let's see, we are sure of the current, and really can take that 2 volts for granted, so let's play with the numbers. The resistance of the LED would be: R - E/l; 2/.025 = 80 ohms. You can take it from there if you want to confirm anything else for yourself. N ow let's take a look at that glow plug cir­ cuit, shall we? Electrically, it is the equiva­ lent of the LED circuit. But we know little about it, and need to know more. Even one more circuit value will help, as we know that by using Ohm's Law we can calculate 3 y 5 * 4 ia j* ·> «»■■< anything else we need. It would help to C o n tin u e d o n page 85 • This month we are starting off with a full units only, thus the conversion of 25 quite basic R/C item: the glow plug. The milliamps to .025 amps.) subject is raised by "Stoney" Jasper, of Anyway, we now see that to power our 2 90° SEGMENT Washington DC, who writes: volt, 25 mil LED from 9.6 volts, we need to "W h at resistor would I use on a two-volt add a 304 ohm series resistor. Since 300 rechargeable battery to bring the voltage ohms is a standard value for 5 % resistors, down to 1-1/2 volts for my Cox glow plug?" one would use that size resistor. Now, how Well, as those of you who follow EC well about the wattage rating? Another form of know, I am not going to tell Stoney some­ the law is: W - I2 x R, which works out to thing like, "6743 ohms at 8.3 watts" and let .025 x .025 x 304 - .19 watt, for w hich a it go at that! In fact, I'm not going to tell him quarter-watter would be perfectly safe. to use a resistor of any value, but we'll get to For confirmation, let's run that 304 ohm that later. Actually this is one of those in­ resistor through O hm s Law, to figure the stances that should be solved with a simple voltage across it in this case. W e know its re­ application of Ohm's Law, and let's run sistance, obviously, and the circuit current. through that procedure first. W e are dealing Therefore: E - I x R; E - .025 x 304 - 7.6 with a form of the common voltage divider, volts exactly. W hich leaves 2 volts for the Mechanical illustration of a servo pot. It is a simple resistor in series with some type of LED, right? Well, we can't confirm the vol­ connected directly to the servo output shaft and thus rotates only 90° of its pos­ load. It is called, of ail things, a series drop­ tage drop across it with our formula, since sible 2 7 0 ° of travel. ping resistor, and is there to reduce a high we don't know its resistance, do we? O r do voltage to the proper voltage required by the load. W e can figure its value with the usual form of Ohm's Law for calculating resis­ tance: R = E/l. However, in the case cited above, all we know is two voltages, that of the supply battery, and the voltage rating of the plug, and we can't work the formula with those. It is possible to obtain other values, but let's keep it simple at this point and use another example with known fixed values. Assume that we want to add an LED indi­ cator to our transmitter. W e know we have 9.6 volts for the supply battery, and that com m on LED ratings are 2 volts at 25 mil- liamps. The object is actually to add a resis­ tor in series with the LED to limit the cur­ rent to 25 mils; the voltage drop across the LED w ill then be exactly 2 volts, the resistor having to drop the excess 7.6 volts. Refer to the simple sketch to see things clearer. Now the formula: R - 7.6/.025 = 304 ohms. (Re­ member that all values used have to be in

14 MODEL BUILDER HUMONGOIIS SAGE HEN By BRUCE EDWARDS and AL ALMAN. . . What this lightweight seven-footer lacks in sexy curves, it more than makes up in its ability to be easily built and flown by the rank beginner. It's the ultimate R/C trainer.

• This design originally started out as a found in most other construction arti­ and even then remain quite shaky if a com­ dandy little 18-inch rubber-powered model cles. . . promises that the plane will be petent pilot isn't standing beside them dur­ manufactured by Peck-Polymers. Then, be­ great for both training and aerobatics along ing each and every flight. cause he liked it so much, Bob Peck kitted with subtle hints that bad breath, body odor The fact is that too many people are lost an even dandier .10 to .15 powered version and a shallow personality will also improve to our hobby because they start with the called the "Prairie Bird 50" that turned out once you've got this terrific new design wrong airplane. . . and end up with a to be a superior basic trainer; it was easy to flying. learning curve that is too flat. Where is it build, very slow, very stable and very Well, surprise, surprise. . .we're not written that learning to fly must be less than forgiving. about to blow any smoke about the Sage enjoyable, and full of nervous frustration, But for all its inherent goodness, Mr. Hen because like the five-cent cigar, there anger and an overpowering feeling of Peck's Prairie Bird 50 needed improvement also ain't no free lunch. inadequacy? in one area: it was kinda small and therefore In other words, this bird can't and won't Three prototypes of the Humongous hard to see at any real distance or altitude. double as a basic and aerobatic trainer. Like Sage Hen were built and have racked up So, since we can't offer the world what it any aeroplane it would be too severely something over 100 hours of wonderfully sorely needs. . .a five-cent cigar. . .we compromised to do both jobs well. relaxed flying time so far. And nine young­ decided that the next best thing would be to Our one and only promise is that built sters (ages 8 to 65) have discovered how out-dandy the Prairie Bird by making it into and powered as recommended, the Hen satisfying and easy on the nerves it can be to an 84 inch Humongous Sage Hen. Our ba­ w ill be the best possible trainer for a begin­ learn R/C by starting with the Hen... a sic philosophy was based on a very simple ner. It'll make learning to fly a most enjoya­ plane so well suited to a beginner's needs. fact of life, that B IG B IR D S FLY BETTER! ble and low-stress adventure, allowing you Four of the students never flew before and But why 84 inches? Well, what really to build up confidence, solo and then the other five had been trying unsuccess­ happened was that Bruce's old calculator progress on to an intermediate trainer in jig fully for years with the wrong type of had a stroke when first turned on, coughing time. "trainer." All nine, including Al's eight-year- up a factor of 1.68 just as it expired. . . and The problem is that all too often guys w ill old, Adam, zipped through training and so­ since this happened on his birthday and re­ end up with the worst design to learn on, loed with ease. . . mainly because this air­ membering that he was born on the cusp, with the result being: 1) they're so intimi­ plane builds gobs of self-confidence and Bruce was convinced that 84 inches had dated by the airplane that they never feel self-reliance. been predestined. ("It was written in the comfortable enough with it to even try to Even experienced pilots can enjoy this stars," is what he actually said.) O f course, s o lo .. . usually because it's too fast, leav­ gentle bird. W e personally accounted for in the face of such an overwhelming scien­ ing them with the terrible feeling that their well over half of those 100 hours doing tific argument, Al had to agree that 1.68 was reflexes are hours behind the bird and will touch-and-go's, chasing thermals, taking a very nice factor, indeed. never catch up with it; or 2) they finally do photos and dropping candy. . .with skis By this time you're probably looking for solo, but only after an unnecessarily frus­ and floats planned for the future. the wild and extravagant claims usually trating and protracted period of time. . . Obviously we had nothing to do with this

MAY 1989 15 square corners, you can, of course, round off those corners and tips and customize the bird. . .but the "square" straight-lined Humongous Sage Hen presented on the plans should be a lot easier for beginners and inexperienced builders to duplicate. About glue: W e used Hot Stuff, mostly "Special T" for all construction. If you also use a cyanoacrylate (CA) glue, be sure to first spray the foamboard with Pacer Tech's Z-Foam Primer so the CA won't eat the foam. (The exception to this is Satellite City's new Hot Stuff UFO, which requires no primer for gluing foam.) Of course, epoxy or cabinet maker's aliphatic glue can also be used, but there is a very real weight penalty involved when using these adhe­ sives and a much longer curing or drying time. An important fact to remember about Co-designer Bruce Edwards poses with his and A l Alm an's first two Sage Hen prototypes. The any glue is that too much is a no-no. A thin little one in the middle is the Sage Hen's predecessor, the Peck-Polymers Prairie Bird 50. layer of glue is all that is needed if the joints design's remarkable stability. She started off near as effective as the rudder, and you'd be fit right. "right"; a light, flat-bottomed airfoil cabin lugging around a bunch of dead weight to And be absolutely certain that your work design with am ple dihedral and a long tail boot. board is flat and true, otherwise all kinds of moment coupled with a very generous What's that, bunkie? You say that you warps will be built into the airplane. Try a amount of tail area. can't fly without ailerons? Not so! All you've hollow door; slightly damaged ones cost a But by enlarging her w ing area to 1,265 gotta do is plug the rudder servo into the ai­ mere pittance, they're easy to push pins into square inches, Bruce came up with a size leron channel. Neither the plane nor the ra­ and most always are warp-free. that's not too big. . .yet at a nominal 7-3/4 dio will know or care what you've done, TAIL FEATHERS pounds she's very lightly loaded (about 14 and once the stick twiddling starts it's not 1) Cover the plans with clear plastic. oz./sq. ft.) and therefore flies effortlessly on going to matter to you, either. 2) Cut all 1/4-inch balsa pieces to fit and the wing with only a Saito 45 for power. Som e folks like to argue that starting with glue together—and don't forget to include W h ich brings us to a few words about en­ three channels is bad, that it makes the in­ the hardwood gussets for tail bracing and gines and control systems. You don't need evitable transition to four channels (aile­ control horns. Build the stab, elevator, fin or want anything much more powerful than rons and elevator on the right stick and rud­ and rudder separately. a Saito 45, nor do you want scads of rpm or der and throttle on the left stick) a problem. 3) W h e n the glue is dry remove the parts too much speed. All three prototypes flew We've found that this just isn't so. Learning from the board and sand lightly, rounding outstandingly well with Saito 45's (one also to fly a well-mannered three-channel bird off all edges. flew well with a Davis Dieselized World En­ first builds up a very solid foundation of the 4) You can prepare the control surfaces gines Brat 25) and large props. . .like a aforementioned self-confidence and self- for hinging before or after covering with 12x4,12x5,13x4 and 14x4. If you use a two- reliance, allowing a fledgling to transition your favorite iron-on. Either way, a good cycle engine don't go over a .40, and do try smoothly to four channels. choice would be Sig's new Easy Hinges. As something larger than the typical 10x6. However, if your transmitter has an aile- the name implies, they're easy to install and The Sage Hen was not meant for aerobat­ ron/rudder coupling switch you can put it a drop of regular (thin) CA on each side an­ ics. She's a putt-putt. You can, however, to good use and simulate four-channel chors them permanently. push her into some wide barrel-rolls and operation right from the start. Turn this 5) After all tail pieces are covered, install loops by carefully trading altitude for air­ switch "on" and connect your rudder servo the control horns on the hardwood inserts. speed. . .but cramming in an oversized, to the rudder channel as you normally 6) G lu e the base of the fin into the slot in more powerful engine would be a bad would when using four channels. Now the horizontal stab. M ake sure that the fin is move. both the aileron and rudder sticks will con­ perpendicular to the stab and that this glue Also, she was designed to fly with three trol rudder movement; you can use the left joint is wood-to-wood and free of any cover­ channels (rudder and elevator on the right stick for taxiing and initial takeoff correc­ ing material. Install Easy Hinges at this stick and throttle on the left stick). Messing tions, and then switch to the right stick to time. M ake sure that the bottom center part with ailerons would be an absolute waste of complete the takeoff and for normal flying. of the horizontal stab that glues to the top time because they wouldn't be anywhere In regards to the Hen's straight lines and rear of the fuselage is also free of covering.

Cabin structure is quite sturdy with all that plywood and diagonal Tail surfaces are about as easy as you could want. Plan shows a short­ bracing. Fuselage sides are Sig foam-board with spruce longerons. er fuselage tail end than was used on the prototypes.

16 MODEL BUILDER Basic fuselage structure, ready for installation of the pushrod tubes Hardwood wing mounting blocks are epoxied in place, then drilled and the top and bottom fuselage sheeting. and tapped for the nylon wing hold-down bolts.

W ING CENTER SECTION 11) Shape the balsa wedges that go in the plywood wing joiners fit and that the lead­ 1) Cover the plans with clear plastic. center section trailing edge areas. Be sure ing edge, trailing edge, and spars mate 2) Cut out the bottom 1/16-inch balsa the blocks fit and are in place before sheet­ properly. sheeting and pin in place over the plans. ing the top of the center section. 2) Repeat Step #1 and trial fit the right Note: Only the middle five W-1 ribs are 12) G lue in all front and rear 1/8-inch outer panel to the center section. completely sheeted top and bottom. The balsa shear webs. Make sure that the grain 3) Pin the wing center section flat on your rest of the center section is sheeted on the is vertical. board and, placing the dihedral guage un­ bottom only from the leading edge to the 13) Lift the wing from the plans and care­ der the left outer panel wingtip so that it's first spar and on the top and bottom from fully extend the three 1/4-inch wing bolt jacked up to the correct angle, glue this the rear spar to the trailing edge. holes through the bottom sheeting. panel to the center section. M ake sure that 3) G lu e the 3/8-inch leading edge dowel 14) Replace the wing on the building the plywood wing joiners/dihedral braces in place on the top front of the leading edge board and glue on the top 1/16-inch balsa are securely glued to the spars. sheeting. center section and trailing edge sheeting. 4) Repeat Step #3 for gluing the right 4) Glue the 1/8-inch square hardwood Glue the upper capstrips over the top of all outer panel to the center section. The di­ strip to the rear of the trailing edge sheeting. other ribs. hedral guage should insure that both tip di­ 5) Carefully mark the position of the (Note: The upper capstrips are much eas­ hedral angles (15 degrees) are the same. lower front 1/4-inch square spruce spar on ier to install and w ill curve to the top airfoil 5) Sand the entire w ing in preparation for the sheeting and then glue the spar in place. shape if a knife handle or dowel is rolled covering. 6) Carefully mark the position of the along their full length.) 6) You must balance the w ing or else your lower rear 1/4-inch square spruce spar on 15) Remove the wing from the board and Hen will always want to turn toward the the sheeting and then glue the spar in place. carefully extend the three 1/4-inch wing heavy tip. This can and should be done be­ 7) G lu e lower capstrips in place. bolt holes through the top sheeting. fore it is covered. Turn the wing upside 8) Glue all centersection ribs (1/8-inch LEFT AND RIGHT W ING TIP PANELS down and place the middle W-1 rib on a balsa or foamboard) in place. Angle the left The building sequence for both tip and right outboard ribs to the 15° dihedral panels is essentially the same as for the angle of the outer wing panels. center section, except that there are of 9) G lue the top front 1/4-inch square course no angled ribs, no center mounting spruce spar in place. blocks or bolt holes, and no center section 10) Fabricate the hardwood wing mount­ sheeting. Final step is to glue on the 3/8- ing blocks that are built into the center sec­ inch balsa tips. tion. Drill 1/4-inch holes in the blocks using W ING ASSEMBLY a drill press and glue the blocks in place as 1) Trial fit the left outer panel to the center shown on the plans. section. M ake sure that the front and rear

The Sage Hen's tail surfaces are wire braced. Wing construction has been modified since this photo was taken (see plan) by deleting the for- One-inch strips cut from nylon cable ties were ward spar and extending the half-ribs back to the main spar. used to attach the wires to the structure.

MAY 1989 17 FULL-SIZE PLANS AVAILABLE - SEE PAGE 106

18 MODEL BUILDER One of the prototype Sage Hens about to make a touch-and-go. You can see why she flies so well; lots of dihedral, a long tail moment, and mucho tail area.

straightedge. Bring the lighter panel into right side and a left side. balance by gluing small fishing weights or 6) Lay the two foam core sides flat on your The HUMONGOUS SAGE HEN sheet metal screws into the inside of the tip building board so their fronts are even with rib. each other and their top longerons are run­ FUSELAGE ning parallel to, and touching, each other. 1) Cover the plans with clear plastic. Be sure that both sides are identical. Con­ ** — if000· BOtLOCft .* ? · ^ — "«1 2) Splice the four spruce longerons to be sult the plans and, using a square, draw the glued to the fuselage sides, making sure firewall and former locations on both sides that each longeron is spliced at a different simultaneously. point along its length. 7) Cut the firewall (F-2) to size, drill holes 3) Cut out the 3/16-inch Sig foam core for the engine mount and install 6-32 blind fuselage sides and splice as shown on the nuts. plans. 8) Lay the right fuselage side flat on the 4) Glue the spliced longerons to the top workboard and, using a triangle or any tool and bottom of each foam core side. that has an accurate right angle, glue the 5) Glue the 1/16-inch ply doubler to the firewall, 3/4-inch triangle firewall supports inside of each fuselage side. and formers F-4 through F-7 in place. Make Note; Make sure that you end up with a sure that all formers are vertical. 9) G lue the left fuselage side to formers F- 4 through F-7, making sure that each former is properly located where marked. 10) With the forward, bottom part of the fuselage secured in place over the fuselage top view, pull the tail section together di­ rectly over the centerline. The whole idea here is to make sure that w hen gluing the tail post in place, the fuselage ends up sym­ metrical and not shaped like a banana. 11) Install all of the remaining formers and the 1/8-inch plywood strips that go on the upper sides of F-4, F-5, F-6 and F-7. 12) Install the landing gear blocks and gussets. 13) G lue the 1/16-inch balsa doubler in place (grain vertical) that's located under the horizontal stab. 14) G lu e the 1/8-inch sheet balsa stab seat in place between the two rear fuselage sides. 15) Install the 1/4-inch square hardwood tail wire brace mounts on the rear bottom of the fuselage so they will be flush with the outside surface of the sheeting. 16) Install the outer Sullivan Gold-N-Rod casings for the elevator, rudder and throttle. 17) Sheet the remaining fuselage areas (top and bottom) as shown on the plans. 18) Glue on the 1/2x1/8 balsa strips at the front and rear of the cabin so that heat- shrink covering can be applied with ease. 19) Fabricate a 1/8-inch lite-ply hatch cover for the fuel tank/battery compart-

Continued on page 102

M A Y 1989 19 the piston hitting the bottom of the plug. Al­ though these two alternate plugs almost al­ ways improve idle performance of an en­ gine, testing them in the Queen Bee showed no advantage. Undoubtedly these INSIDE ^ENGINES two plugs stick down into the combustion chamber and somewhat upset the combus­ tion pattern. The short Fox plug worked per­ fectly from high speed to idle and the same plug survived all testing. Cox Super Fuel #551 was used for initial running. An unusual design feature of Cox engines is that the top of the connecting rod w ith STU RICHMOND is a ball in shape—and the ball is swaged into a socket that's machined into the lower side of the piston crown. The ball is inserted C o x . 0 7 4 Q u e e n in the socket and then precision tooling peens or closes the lower skirt of the socket around the ball to freely hold it in place. • One of the most treasured model engine raced Cox TD's in 1/2A pylon and sport Cox has always used castor oil (about 20%) books I own has the outline of a Cox engine flown the 1/2A's a lot and until now, there in their proprietary fuels to provide maxi­ embossed on its cover. The book details has not been a really effective speed control mum lubrication to this socket. But I sense model engine history from 1848 up to to­ in these small engines. The new Q ueen Bee a trend towards lower total oil content in day's technology. Subjects include theory features a standard design Cox piston/ fuels for today's engines. As unburned cas­ and practical applications, ignition, diesel cylinder and uses the Teflon reed induction tor oil exhausts from an engine it carries and glow, chemistry of fuels and combus­ valve. But now a precision molded R/C car­ away much heat from combustion, so an ex­ tion, tuned pipes, props, metallurgical buretor is included, along with an effective cess of oil can lower performance in en­ transformations, and it includes hundreds muffler. You small model R/Cers now have gines. As oil content is decreased engine of photos and engineering drawings. The available a real R/C engine for your small performance (at both idle and top speed as book is Miniaturowe Silniki Spalinowe, models! well as acceleration from idle) improves un­ published in Poland and I can't read a word of it! But by having the Cox engine on its cover, you get some idea of the respect these fine American-made model engines enjoy all around the world. So, as the world waits for sunrises, the world's model builders have been waiting for the new Cox Queen Bee .074 R/C engine to becom e available. Cox's initial order is a huge one going to Europe, but a trickle of the engines should be available as you read this review. Regular readers of "Inside Engines" know the emphasis I place on usable speed ranges of R/C engines. The rotating Ace ex­ haust collar has been a substitute for car­ bureted speed control on Cox engines. I've

O u r test engine is a very early version, til the total oil content no longer offers ade­ and as production progresses there are sure quate protection to moving parts and to be minor manufacturing changes and failure follows. Too much oil can cause un­ improvements—all manufacturers want us steady wavering speeds in engines. I dis­ to be satisfied customers. I can see great cuss this only to help you understand fuels growth in small field R/C flying now. used in this particular review. A few quotes from the instructions follow: Although the instructions state that no "A break-in period in the ordinary sense is break-in is necessary, in running the Cox # not necessary; in fact, a slow, easy break-in 551 fuel I found the more the engine was is not desirable. Most of these engines will run the better it performed. I made a long develop full power within one minute of series of full-speed, heat-raising short (30- running time." 90 seconds) runs and allowed a complete "Thirty minutes running time will add a cooling between these runs. Initially the few RPM for peak contest operation." test engine showed high speeds wavering "Remember—your Queen Bee engine is up and down 300 to 400 rpm at full throttle designed to perform its best at high speeds. as well as at the 5,000 idle speed I tried. Let it w ind up. D o not use oversized props." Had I sim ply put the new engine in a model The engine comes with a Fox short non- and gone out to fly it after a minute of run­ The .074 Queen Bee should bring out a whole ning I think I would have not been satisfied new generation of small R/C models. Latest idle bar plug. By adding two additional production run should be ready by middle to washers, a Fox M iracle plug or a K&B #4520 with the performance due to unsteady, late April. idle bar plug can be fitted without the top of wandering rpm's at a ll throttle settings. I de-

20 MODEL BUILDER QB pretty much follows traditional Cox practice. A notable excep­ Disassembled carb. Note the teflon reed (laying on the coiled retain­ tion is the normal glow plug in place of the familiar Cox glowhead. ing ring) which serves as the inlet valve for the fuel/air mixture. tail this so that in case you experience this unsteadiness, please recognize that m ore high speed running, along with cooling, w ill allow the engine's moving parts to bet­ ter seat and give you optimum perform­ ance. Unsteady initial running is often an indication that something is too tight a fit, is expanding with heat and causing a metal- to-metal bind that brings rpm's down. Lower rpm's are caused by metal-to-metal galling. The best protection against galling the metal surfaces and causing damage is, in the case of the Queen Bee, to initially use the manufacturer's recommended heavy castor content fuel! The first fuel through this engine really ought to be a pint of Cox #551 Super Power fuel. But high castor con­ tent can also cause varnishing on the pis- ton/cylinder walls and the instructions ad­ dress this problem too. I feel the simple fix is, after the first hour of running, to switch to fuel that is a castor/synthetic blend with de­ tergent cleaning action and use somewhat less than 2 0 % oil. After the Q ueen Bee test­ ing was done on Cox fuel I made a switch to a castor/synthetic fuel of less oil percentage The Queen Bee turns a Cox 6x3 at 16,000 to 18,000 rpm, depending on the fuel and needle —this was after about 90 minutes of total valve setting, but will idle beautifully at less than 4,500 rpm. running and the engine smoothed out at a ll speeds and becam e a real honey to run. G o ­ ing back to the Cox #551 all-castor fuel brought back the varying rpm performance. Cox .074 Queen Bee The purpose of "Inside Engines" is to en­ able you to get the best performance from your purchase and to show/tell you what's inside your engine that yields this perform­ ance. W hile on this long discourse on fuel for the Q ueen Bee, let me tell you I made a mix of 35% nitro and 22% castor to study the nitro/rpm performance and feel that the lower 15% nitro, as Cox Super Fuel con­ tains, is the better nitro choice. After the first hour of running, perform­ ance was noticeably improved. The 5,000 rpm idle speed was lowered to 4500 by ad­ justing the barrel closure and the needle valve w hile at id le speed. This same needle setting technique finally yielded an ultra­ reliable idle at 4250 rpm on a 6x3 Cox gray prop! This is truly great for such a small Bore: .463 in. engine—while holding your hand behind Stroke: .439 in. the engine at 4250 you felt very little prop Disp.: .074 cu. in. blast. The exhaust from the pretty alum i­ Weight: 4 oz. num muffler offered more "squirt" on your hand than the prop blast. I walked away

C o n tin u e d on page 64

MAY 1989 21 Brim field Float Fly

By STAN JONUTIS. . . Among R/C seaplane fliers, the Brimfield biannual fun-fly is considered the biggest and best. Come along as our reporter reviews the action at last September's gathering.

• The Brimfield Float Fly has been a time with the latter, watching the others especially, sites are being lost to develop­ M ecca for N ew England seaplane fliers for cavort through the waves and puffy picture- ment at a high rate. Thanks, Don! several years now. The event is sponsored perfect clouds. There was a lot to watch and O n to the winged stars of the meet and twice yearly by Don Foster of Gee Bee Prod­ there were nearly always two or three their creators. The first craft that caught the ucts. Located in the heart of Massachusetts seaplanes in action. eye of many admirers was a Lockheed ten miles from Worcester and just outside This being my first stab at journalism, I Sirius, built by Lloyd Roberts, in what ap­ of the historic re-created colonial village of was kept busy running around taking pears to be 1/5 scale. This craft was pat­ Sturbridge, the Streeter Reservoir offers a photos and trying to catch up with the terned after the seaplane flown by the great nearly perfect base from which to operate builders and fliers. I neglected to look at the Charles Lindberg and wife in the process of seaplanes. The only problem is that it is nor­ registration board but estimate about 40 charting great circle routes for future airline mally a swimming area and only open to fliers were present with about 60 seaplanes; use back in the '30s. The original seaplane seaplane fliers twice a year; the weekend many modelers brought more than one. before Mem orial Day, just before swim ­ Don Foster brought the most. His collec­ ming season, and the fi rst weekend after the tion, with the exception of his Heinkel He Labor Day holiday, when the swimming 51, was composed of his kits: the Mallard, a season closes. 12-year-old twin Mallard, Islander, and Sea The first day of September's two-day meet Hawk. Don is the driving force behind dawned beautifully clear and calm. Later a these meets and has quite a battle with red breeze kicked up that kept most of the tape to get the state to open up the beach smaller models and less daring fliers, un­ for the meet. We need many more con­ w illing to risk their creations, shorebound. cerned modelers like him to look after our Unfortunately, yours truly spent most of his ever-dwindling flying sites. In N ew England

Absolutely gorgeous Lockheed Sirius in 1/5 scale, possibly built from Doug MacBrien put on quite a show with his 1/5-scale OS-2U King­ Hostetler plans. Proud builder/pilot is Lloyd Roberts. fisher built from original plans. Had 1/6-scale version also.

22 MODEL BUILDER Two beautiful scratch-built Schneider Trophy racers by Leo Mariani, the Gloster IV B in 1/4 scale (above), and 1/5-scale Curtiss R3C-2, which also appears on our cover this month. The Gloster wasn't quite finished, but the Curtiss flew up a storm.

tearing the wing root open. It got a little waterlogged while the retrieval was made. In all, three 1/4-scale Cubs were present. All put in spectacular slow flight performances, indifferent to the stiff breeze. The longest takeoff runs were by three Northstars, kitted by Balsa USA. They had great handling on the water and featured a novel nose water rudder. Landings were equally spectacular with a pancake splash­ down and speedboat run back to the beach. In the area of beginner craft, a beautifully done Sig Kadet Senior with an O.S. .61 four- stroke on B.J. floats by Bob Cavicchi did Author's two original twin-engine seaplanes, the Sea Hornette (left) and Supermarine Frigate. very well in the breeze despite its three- Sea Hornette, with only a 48-inch span, is a real wild machine with two Cox Conquest .15's. channel controls (no ailerons). Bob says the is now on display in the National Air and that of losing control of my scratchbuilt Sea Senior is one of the early original kits sold Space Museum in Washington D.C. W ork­ Hornette twin and diving vertically into the by Sig and the craft has always been on manship was outstanding and its flying water from 50 feet. Surprisingly, little dam­ floats. M y flying buddy, Ron Sayers, brought characteristics were most scale-like, right age was done; just the two floats sheared off along a Goldberg Eagle with an O.S. .40 down to the motor noise on the fly-bys. The and a hole in the wing. I changed the radio Surpass on Goldberg floats. Engine prob­ Sirius (pronounced like "serious") suffered for the next day's flight. Being a prototype lems kept it from taking off even after much a mild dunking, and Lloyd did not return for for a twin project of mine, the Hornette is tinkering and prop changes. When we did the second day. not quite right yet and a handful to fly. It is get it off unexpectedly, we stalled it into the O ne of a few seaplanes I didn't get the only slightly larger than a quarter midget water and spent the rest of the day drying it builder's name for in the excitement was racer but is powered by two very potent Cox out. The model had great handling in the the PBY-5 built from Sid Morgan plans. rear-exhaust racing .15s. The twin sound in water and Ron had no problems taxiing Craftsmanship was immaculate right down the air was something. On the second day I around the lake without regard to the to the thousands of rivets. Two K&B ,61s pro­ managed one perfect flight with a splash breeze. Next time an O.S. .61 FS goes into vided more than enough urge. Its only flight down right-side-up and a taxi back to the the nose! was delayed by a dead transmitter battery beach. O n my last flight the Sea Hornette Two cute scratchbuilt Schneider Cup (be sure to double check your equipment torque-rolled into the water on takeoff due racers were brought by Leo Mariani: a really before every session), and then it had prob­ to a broken rudder horn. Preflight your tiny 1/5-scale Curtiss R3C-2 and an English lems with the large waves and the small planes before every flight just like the big Gloster IV-B in 1/4 scale. The Curtiss is mo­ scale tip floats not quite coping with the en­ boys, guys! Again, due to the soft water deled after one flown by Jimmy Doolittle in gine torque, subsequently doing many there was no damage. The only other major the 1925 Schneider Cup race (won by water loops on takeoff. prang I was aware of was a gust of wind Doolittle). The Gloster is modeled after one Som e of the most-flown models were two catching a 1/4-scale Cub after landing and entered in the 1927 Schneider Cup race in OS-2U Kingfisher W W II U.S. Navy seaplanes in 1/6 and 1/5 scale. Doug Mac- Brien has been campaigning the 1/5-scale version for over six years. It has very scale characteristics with a Quadra Q-50 hauling its 27 pounds around in graceful aerobatics. Touch-and-goes were highlights of each flight. The craft was very seaworthy in the breezy conditions. A tip float torn loose by a water loop finally retired it on the second day. The 1/6-scale version performed in sim­ ilar fashion to its big brother, with the only drawback being its unreliable engine, w hich necessitated a couple of canoe trips out to retrieve it. There were few splash-ins, surprisingly Sponsor of the Brimfield Float Fly is Don Foster of Gee Bee Products, brought this flotilla of enough. I had about the only serious one— models. Seen here are a Heinkel 51, Mallard, Twin Mallard, Islander, and Sea Hawk.

MAY 1989 23 Good looking Kadet Sr. by Bob Cavicchi was built from an early Sig A burst fuel line kept this Grumman G-44 Widgeon beach-bound. An kit and has always been on floats. O.S. 61 4/C power. immaculate building job by Ed Zemaitis, from Sig Morgan plans.

Venice. It was powered by an O.S. 1.08 but had an incomplete radio installation and did not fly. The little Curtiss flew up a storm, however, darting across the sky like its big brother with an O.S. .61 for power. It's hard to imagine these small craff are really 1/4 and 1/5 scale until you realize the real craft had wingspans of barely 20 feet—and over 900 horsepower up front! The July, August, and September 1988 issues of W ings and A irp ow er have an excellent series of articles on the Schneider Cup racers. It would be fantastic to create an event for 1/4 scalers to Another beauty from Sid Morgan plans is this PBY-5 by an unidentified builder. Power is two compete in actual races. There is just such a K&B .61's. Model is shown only partially assembled, which is why the wings seem to droop. meet planned for November 10, 11, and 12, 1989, at Lake Havasu, Arizona; The beach back to the water, and took off again! for a collector's item while on a working Schneider Cup Event. It's hosted by the Its low rpm also sounded most scale-like. trip to Australia. It worked great with less Desert Hawks R/C Club and held at the My own Supermarine Frigate (actually a noise and a super idle, with all that extra Nautical Inn Beach on an island in the mid­ Scapa/Stranraer combo; two flying boats flywheel weight out front. Les Bollenhagen dle of Lake Havasu. Watch your calendar! built by Supermarine in the '30s) was taxied originally designed this prop for pattern Leo demonstrated quite unintentionally but was not flown due to my need to take .60s. I liked the combo so much I ordered a what a wet radio can do after a mild dunk­ photographs for an article I've been work­ special batch of props from Les before I left ing. He took off after a drying-out period ing on. My model, Azucena Pilapil (a rela­ the great land of Oz, as Aussies affection­ only to dive back into the water immedi­ tion of Corazon Aquino of the Philippines), ately call their country. Bolly does export ately after takeoff. W ading out to get the couldn't show until the second day, and the his props to the U.S. Stu Richmond has an Curtiss I found the servos chattering like Frigate had to sit on the beach. It really excellent series of articles on the Australian mad even though there was no damage. wanted to fly but I was reluctant to give it a modelling scene in the 1987-88 issues of W ater can and w ill do all sorts of strange maiden flight in front of a crowd. The Model Builder. things to your radio. Good waterproofing is weather did not cooperate for a test flight Another beach-borne craft that unfor­ a must. on the second day and started out breezy, tunately did not fly was a Grumman G-44 Another flier who spent more time in the unlike the perfect calm of the first morning. Widgeon, built from Sid Morgan plans by air than on the beach was Jimmy Jenkins, The Frigate spans 8 feet, 6 inches, weighs Ed Zemaitis. The craft was done up in a flying a Lazy Ace powered by no less than a about 12 pounds, and is powered by two striking Coast Guard scheme. Powered by Sachs 3.7 gas two-stroke. Now, the Lazy Ace Enya .46 four-strokes turning four-bladed two O.S. .61 FS engines and spanning about was originally designed fora .60! A dem on­ Australian Bolly fiberglass props. The 11x7 six feet, Ed worked hard to get the reluctant stration of its power was an overshoot land­ four-blade prop seems to be made for the engines going, only to have an internal fuel ing that ended up on the beach. Jim just engine. I discovered this by accident after line break and damage the immaculate fin- goosed the engine, turned the plane breaking my last prop for the Enya .46 en­ around 180 degrees, taxied across 10 feet of gine and bolting on the Bolly I had bought Continued on page 70

Above: John Nicolacci's huge Martin Mariner has been a fixture at Brimfield fly-ins for years. Two .90's, span is about 12 feet. Right: One of a number of Nelson Whittney's electric seaplanes was a deli­ cate looking Sikorsky S-38 with two Astro 25's.

24 MODEL BUILDER can be corrected by giving the motor a bit of left thrust, then control w ill be equal both ways. The usual advice is to find someone ex­ perienced to help you with the first flights. This is very good advice. I did not do this when I learned to fly and had many crashes. The best advice is to be stubborn. Repair the plane and try again! Pick up a ll the pieces, put it back together just as you By MITCH POLING would a jigsaw puzzle, and fly again. My planes fly best after they have been “broken in" by crashing a couple of times! Another commonly accepted piece of advice is to start with a bigger plane, be­ cause "they are easier to fly." M y opinion is • Many new electric designs have been ap­ to build, but take slightly more attention to to the contrary. I fly both large planes and pearing on the market, showing the expan­ fly. The Goldberg Electra and the Leisure small ones and the small ones are just as sion of interest of electrics. As always, how­ Amptique are the two top ones in this easy to fly, and in some ways easier. The ever, the most-asked question always seems category (my opinion, of course). They fly usual saying is that "big ones handle wind to be: "I am starting in R/C and want to be­ beautifully, but are not quite as quick to better." Yes, they do, but a beginner has ab­ gin with electrics. What plane should I recover from odd attitudes and maintain solutely N O business trying to learn to fly choose?" I have two top recommendations: level flight. They are far easier to fly than in any wind over 5 mph, period. If that the Leisure Playboy kitted by Leisure Elec­ most of the "trainers" that are advertised. means getting up at 5 a.m. so you can fly tronics and the Brigadier, available as plans However, the complete beginner may have with no wind, do so. The great advantage of from Model Builder (No. 9822, $8.50). never built a model at all, and would like to electrics is that early morning flying is prac­ These two planes can literally fly them­ get a ready-to-fly. In that case, I would tical and easy. selves, no pilot interference needed. They recommend the Cox Electric Malibu. It is Yet another piece of "usual advice" is: are O ld Timer designs, originally free flight, com pletely ready to fly and is as easy to fly "Get a radio with aileron (or rudder) and and they have kept the ability to "self fly." as the Amptique and the Electra with one the elevator on the right stick, everyone flies They also have the disadvantage of Old exception: It has a strong tendency to re­ that way, and if you don't, you'll never learn Timer construction, and many beginners spond quickly to right turn commands, but to fly four channel." Again, I disagree. The find the built-up stick construction is slow to turn to the left. You must be very beginner needs the elevator and turn con­ daunting. careful not to turn too quickly going right, trol (rudder or aileron) on separate sticks. Next on the list are planes that are easier and give it all you've got to turn left. This The transition later to having them on the same stick is easy once you know how to fly. Every beginner I have ever taught, with no exceptions, clutches the stick and vastly overcontrols. Along with shaking knees goes shaking hands, and the stick is doing a little rotary dance! This means the beginner is mixing in a liberal am ount of random ele­ vator control with the turn control, and things quickly get out of control. If the ele­ vator is on another stick, this problem goes away. If you are learning and have this prob­ lem, shift the elevator over to the left stick, and watch that tiger tame down! Speaking of clutching the stick, a very successful way to avoid overcontrol is to push the stick with one finger, then let the stick spring back. The whole action from start to finish is done in a count of "one." If Our columnist rates the Cox Electric Malibu as one of the best electric A R F trainers for begin­ ning fliers. See text for additional comments. Continued on page 69

The lightweight construction and inherent stability of Old Timers make them outstanding candidates for electric power. Colin McKinley's 7-ft. Powerhouse (left) uses an Astro 60 on 24 cells; the 67-inch Quaker Flash (right) by Howard Lazerson is powered by an Astro 25 on 14 cells.

M A Y 1989 CHOPPER CHAPTER

By JAMES WANG

• This month, let me show you some of the There is an overwhelming selection of adjacent channels. If you do not convert state-of-the-art equipment in R/C helicop­ helicopter radios on the market. It is getting your radio to narrow band, then you are ters. Competition always brings out the best to be very confusing. To make it easier I risking having your helicopter shot down. in everything. To give you a good idea of have compiled the data for all the available The cost of converting an older radio to nar­ where the technology is, Table 1 is a com­ heli radios and they are shown in Table 2. row band will generally cost around $70. If prehensive compilation of the equipment All the radios listed can be ordered with dif­ it is of 1970's vintage, it might not be con­ used by all the fliers at the most recent bien­ ferent grades of servos. The prices given in vertible at all. Check with the manufacturer. nial F3C R/C Helicopter World Champion­ Table 2 are the manufacturer's suggested re­ To give you an idea of how good modern ships held in 1987 at Bern, Switzerland. If tail price. The prices at the store w ill radios can be, let me give you two exam­ you are a competition flier, or aspire to be almost always be significantly less. ples. My Airtronics Module 7H radio has a one, then you ought to seriously check out All of the 1989 helicopter radios listed in dual conversion, narrow band receiver. what the top honchos use. A famous Table 2 (except the JR 6H) em ploy FM trans­ When I turned on another older radio that Chinese strategist, Sun Tze, said two thou­ mission and also meet the 1991 FCC regula­ is also on the same frequency, the Module sands years ago, "If you know thy enemies tion. Thus, they require no modifications 7H continued to work flawlessly, while the as well as yourself, then thou shall win all for legal operation in the 1990's. However, if old wide band radio just went haywire. battles." The Third F3C World Champion­ you have radios that were manufactured be­ W hy? I don't know. High signal to noise re­ ships will be held in the summer of this year fore Fall of last year, then almost surely you jection ratio? I might have an electrical en­ at Tidewater, Virginia. Hopefully, I can be will have to send them back to the manufac­ gineering degree from M.I.T., but I still don't there to report for you. turer for upgrade to meet the 1991 FCC have any educated explanation. Usually Since 1987 there have been a lot of new regulations. The reason is that by 1991, the w hen I open up the back of a modern radio, developments in the R/C helicopter indus­ FCC will require tighter tolerances on the I am just as perplexed as most modelers. I try. This month I will tell you about some of spacing of radio frequencies. There will be definitely do not mess around with the in­ the newest products that I saw at the recent other users, such as repeaters, sharing our side of a modern radio. 1989 International M odeler Show held at Pasadena, California. Helicopter radios seem to be where the heat is. The top three manufacturers, JR, Futaba, and Airtronics, are battling for a piece of the cake in the top-of-the-line heli radio market ($800- $1200). All three manufacturers are pulling out all the stops and are boasting fancy programmability that is extraordinarily im­ pressive. The features on these special heli radios just go on and on. Frank Dyke in the Hobby Dynamics booth gave me a 15 min­ ute lecture on only part of the unending fea­ tures on the new JR PCM-10 to be released in April. Bob Renaud and Gene Engalgau, the software wiz at Airtronics, spent 45 min­ utes with me discussing their new, de­ signed in the USA, 16-bit programmable Vi­ sion radio line which will be ready around late summer. Ron Heib and Eloy Marez of Futaba also gave me a run-through on their Spectators at IM S Pasadena ‘89 were captivated by the video at the GMP booth. GMP had a 1989 product line. whole slew of choppers on display, including the new flybarless and flybared Legend.

JR helicopter radios and the slick Kalt Jet Stream and Baron 60EX Airtronics’ new Vision Series radios. They have a 16-bit microproces­ were displayed at the Hobby Dynamics booth at IMS Pasadena '89. sor and the fastest scan rate of any of the PCM radios.

26 MODEL BUILDER Another example: the other day, as I was FIGURE 2 - HELICOPTER RADIOS AVAILABLE IN THE U.S. helping a beginner set up his new X-Cell, another of our group went out to fly his air­ Suggested plane which happened to be on the same No. & Type Battery Retail frequency. The fellow took off and crashed Brand Type Ch. Tx Coding of Servos (mAh) Price immediately. The surprising thing is that we Futaba 9VH 9 1024 PCM (5) S9201 1000 $1199.95 did not even realize that he had turned on 8SSH 8 512 PCM (5) S9201 1000 $1179.95 his radio; I was hovering the X-Cell with a 7 U H P 7 1024 PCM (5) S5101 1000 $799.95 Futaba 512 PCM and I did not even feel a 7UH F 7 PPM (4) S5101 1000 $649.95 glitch. The PCM did not go into the failsafe 6 N H P 6 PCM (4) SI 48 500 $599.95 mode, either. 5N H L 5 PPM (4) SI 48 500 $399.95 W h at are some of the features on modern Airtronics Vision 8 PCM or PPM (5) 735 700 Summer '89 heli radios? The ]R PCM-10 and G alaxy can Quantum Qm-8H 8 PCM (5) 735 700 $949.95 memorize programmed settings for seven (5) 741 $899.95 different models. The modeler can select Spectra Sp-7H 7 PCM (5) 735 500 $769.95 mode 1 or mode 2 by simply pushing but­ (5) 741 $719.95 tons. There are no buttons on the PCM-10; Module 7Hi 7 PPM (5) 735 500 $654.95 you actually press the touch-sensitive LCD (5) 551 $629.95 screen to input changes. Very trick stuff. It Module 7H 7 PPM (5) 735 500 $629.95 also has a pair of the smoothest open gim- (5) 551 $604.95 bal sticks that I have ever felt. I have flown Vanguard 6 PCM (6) 102 700 $450.00 the JR Unlimited 8 and Century 7 since Vanguard 6 FM (6) 102 700 $350.00 1983, and I think the PCM-10 is the best of IR PCM-10 10 PC M or PPM (5) S4031 1000 $1299.99 the best JR radios. The shape of the PCM-10 Galaxy 8 8 PC M or PPM (5) S4001 500 $929.99 transmitter feels just perfect. Both the PCM-9 9 PCM (5) S4001 500 $899.99 Galaxy and the PCM-10 allow the user to PCM-9 select either PCM (pulse coded modula­ (singlestick) 9 PCM (5) S4001 500 $999.99 tion) or PPM (pulse position modulation). It Max 6 6 PCM (5) S501 1000 $499.99 has features like subtrims, and a U-shaped Max 5 5 PCM (5) S570 1000 $399.99 engine curve for high idle so you can fly in­ Century 7 PCM 7 PCM (5) S501 500 $564.99 verted without using the invert switch. The Century 7 $1200 retail price might be steep, but I think (singlestick) 7 PPM (5) S501 500 $649.99 it's worth it for the serious enthusiast. Be­ Century 7 7 PPM (4) S501 500 $529.00 sides the PCM-10 and the Galaxy, Hobby 6H 6 PPM (4) S505 500 $244.99 Dynam ics offers seven other helicopter ra­ dios to meet any budget. JR also makes a learn quicker. a power loss. new 18-inch long w hip antenna to replace The Airtronics 7H, 7Hi, Spectra, and The first generation helicopter radios the original telescoping antenna on JR Quantum, the JR Century 7, Apollo 7, and were the Futaba 5H, the old Sanwa Cham­ transmitters. It w ill retail for $39.95. Unlimited 8, and the Futaba gold color pionship Series, and JR 6H. They were good Airtronics also showed some interesting FG7Hi and 512 PCM are considered "sec­ for the early 80's, and are still fine for sport new radios. The M odule Series 7H and 7Hi ond generation" helicopter radios. The flying, but they lack that few percent of (includes invert switch) are the least expen­ third, and also the newest generation radios edge needed if you want to compete seri­ sive Airtronics heli radios. They still have are the JR PCM-10 and Galaxy, Airtronics Vi­ ously. Sure, competition is a judge of pilot plenty of bells and whistles, more than you sion, and Futaba 1024, which all have soft­ skill, but why not put yourself at an advan­ will ever need for sport flying. Most ware programmability. Hence, you are ac­ tage even before the game begins? helicopter fliers will never even use the tually programming a minicomputer-like For now, the Spectra and Quantum are throttle hold, or high idle switch in the first microprocessor, rather than adjusting pots Airtronics' top-of-the-line radios. The year of their learning. However, I do recom­ with a screwdriver which are called hard­ Quantum is the only helicopter radio on mend that all potential helicopter pilots ware programmable. These third genera­ the market that has SES (synchronized ele­ spend the extra bucks and buy a helicopter tion heli radios have solid state memory. vator system), to allow a movable horizon­ radio, rather than a less expensive four- Like the Airtronics Vision, the memories tal tail surface to be electronically mixed in channel airplane radio. It can only help you are stored on an EEPROM chip, so the fine tune the machine, fly smoother, and memories will be there even when there is Continued on page 96

Futaba offers six different helicopter radios to satisfy the demands GMP's helicopter tool set includes chrome vanadium handtools, a of all pilots, from novices to world-class professionals. pitch gauge, ball link plier, and Loctite. Less than S50.

MAY 1989 27 TABLE 1 2 ~ 8 3 ~ 4 10 10 11 11 11 - 4.5 - 3.5 12 12 8 rotation - 4 - 9 ~ 9 - 4 ~ 7 - 4 - 3 - 2 - 4 - 4 - 5 ~ 9 - 2 ~ 6 - 4 ~ 9 - 7 ~ 11 - 5 ~ 10 - 3 ~ 10 - 8 ~ 12 - 4 ~ 10 - 4 ~ 10 - 7 ~ 10 - 6 ~ 12 — — 3 ~ 12 Auto­ - ~ 1.5 13 - 3.5 ~ 12 0 ~ 8 3 ~ 8 2 ~ 8 4 rv 7 5 ~ 8 4 ~ 8 8 ~ 8 2 ~ 8 3 ~ 8 4 ~ 7 11 ~11 11 4 ~ 7.5

MODEL BUILDER TABLE 1 Continued 31 37 27 18 32 37 37 25 27 29 36 38 52 38 32 38 20 29 32 37 35 44 42 31 35 27 41 32 25 32 44 24 28 36 41 40 Age 5 5 3 2 5 2 2 2 2 2 8 6 5 3 1 4 4 1 5 1 5 6 2 2 4 10 15 10 15 5h 2h 31 6h 6h 6h 10b W eek Flying Sessions/ 5 1 5 5 7 2 7 2 4 15 15 10 16 10 15 11 19 18 20 29 20 20 25 14 22 25 20 20 20 in R/C Yrs. Exp. A irplan es 5 7 5 5 4 5 7 7 5 7 7 8 5 6 7 6 6 11 12 15 16 10 14 19 10 14 11 11 17 13 12 15 14 17 17 12 43 in R / C Yrs. Exp. H elicptrs. Fuel LM Glow Bright 80 + 20 11 M.R.C. OPS O riginal 80 + 20 Wfebra O riginal O riginal O riginal Orlgtnal Kindler O riginal O riginal O riginal O riginal Rossi K&B 500FI K & B 5 0 0 H O riginal Graupner G12 K&B 500 M G 500K M G 500K M G 500K Graupner G5 Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y N N N Y Y Y Y Y Y Y N N N N N N N N N N In-Flight sens. Adj. Futaba FP132 Futaba Futaba Robbe/Futaba Futaba Robbe Expert Futaba Futaba FP6153BB IR JR/Graupner JK/Graupner Futaba 153BB Futaba Futaba 152 Robbe/Futaba Robbe Robbe Expert Graupner/JR Futaba 153BB Futaba FP-G153BB Futaba Robbe Futaba 153BB Robbe/Futaba JR NES101 JR 1001 JMW Futaba FP-G1538B Futaba FP-G153BB JMW JR JMW Robbe Robbe |M W Graupner/)R 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 6 5 5 5 5 6 6 5 6 6 5 6 5 5 5 5 5 6 6 Servos 1 1 1 1 1 1 1 1 1 1 1 II II II II 1 II II s II II II II II II II II II II S II II III III III III M od e Radio Equipment Transmitter Futaba PC M Robbe/Futaba Robbe Promars Rex IR/Graupner |R/Graupner JR PCM-9 )R PCM-9 Futaba PCM Robbe/Futaba |R PCM-9 Robbe/Futaba Robbe Promars Rex Robbe Promars Rex |R 128FI |R 128H |R 128H Roblx? Promars Lex |R 12811 Robbe C M Lex Futaba PCM Heli Futaba FP-8 SGH -P Robbe C M Lex IR/Futaba Multiplex MC Royal |R 5016 Graupner/IR Graupner/)R |R PCM-9 Futaba FP-8 SGH -P Futaba FP-SSG HP |R Apex Computer Graupnei/JR )R PCM-9 |R Century 7 Wfebra Space )R Apex Computer Enya Rossi (TS) ITS) Haim/Graupner (TS) Heim /Graupner (TS) Robbe (TS) Robbe Graupner (TS) Vario (TS) Schluter Graupner (TS) Graupner/Heim OS(TS) Heim (TS) Schluter H unziker (TS) H eim (TS) Spreng Brook Heli PipeSchluter M erker (TS) O P S (TS) Robbe Schluter H irobo H eim (TS) Hirobo Schluter Robbe (TS) Muffler or Tuned Pipe System (TS) Enya60 XL Enya Rossi Rossi61 A B C Rossi60 Rossi OS61 FSH OS61 A B C Enya60 Rossi60 ABC W ebra/O S OS61 RF-H ABC OS61 SF-H-P OS61 SF OS61 Longstroke Enya60 XLF Rossi 0561 SF YS60 Wr>bra6l RCH OS OS OS61 SF ABC OPS Rossi Enya 61 ABC W ebra RCH Webra Speed61 Enya 60 XF Wfebra61 RCH Webra61 Engine Vtebra 61 YS60 FSH OS61 VF-H Y S6 0 F S H Y S6 0 F S H OS61 A B C ITA ITA SBA ITA BEL BEL SUI SUI BEL FRA LUX 5UI FRA FRG IPN IPN |PN JPN SWE FRG FRG GRB SWE DEN SWE DUT DEN USA DUT USA USA GBR GBR OUT AUT NOR GDR C ountry Kit Flammang Pedro Caldentey Konstantinos Sfiris loop Vanlenl Michael Nyegaard Rune Nessen Per Nordstroem Ulf johannson Gerard VMeil ftulo Mella Kaj Henning Nielsen Len M ount Kees Verplanke )an Verhagen Maurice Depigrry Christian De Maeyer Thomas Cedergren Michael Davideil Thierry Vterbrugge Ewald Heim Peter Dappen Ueli Muller Jean-Pierre Dupont Giancario Saragosa John Wallington M ike M as Daniele Graber Colin Bliss Vblker Heine Ishikawa Robert Gorham Ikeda Nam e lyobe Stefano Lucchi Taya Contestant's Curtis Youngblood Josef Brennstiner 5 7 8 9 6 1 2 3 4 37 31 17 18 19 14 15 16 11 12 13 36 33 34 35 21 10 32 29 30 27 28 23 25 26 24 20 22 Place

M A Y 1989 Satellite City's claims sounded almost too good to be true, so I just had to give their new 'U F O ' stuff a bloody go. First, I tried to glue pieces of white foam together (these were leftovers from some wing and float core experiments), using both the old and the new 'UFO' Thick. I fully expected to end up with at least some pitting of the foam where the 'UFO' was used but, although the older Hot Stuff did its usually great job of dissolving the foam, the 'UFO ' did nothing. . . nothing, that is, except to weld both pieces of foam solidly to each other. Then I tried gluing scraps of bass, balsa, spruce and ply to the foam with equally outstanding results. To check for fumes I cured a large amount of 'UFO' by glassing a simulated wing center section. This 12 x 6-inch area was WIGHT QUADRUPLANE are honestly and truly User-Friendly & covered with medium weight glass cloth Like most of us, Larry Ladd enjoys an on­ Odorless. Their brochure sez: and soaked thoroughly with 'UFO ' Thin. At going, never-ending love affair with BIG 'The ODORLESS quality of 'UFO' is an this point I normally have my respirator on Birds. And his craftsmanship speaks for it­ unparalleled breakthrough in instant glue to keep the fumes out (and was ready to self. Anyone who's seen his superbly technology that makes 'UFO ' user-friendly reach for it), but found I didn't need it this finished Waco CRG can tell that Larry to those w h o are otherwise cyano-sensitive. time. Usually you can see and smell the knows how to hand massage a plane into For most people the curing fumes of instant fumes coming off of CA as it's curing, espe­ shape. glues are of no consequence, except under cially from large areas. . . but with the W ell, here's a pic of Larry with his latest the worst of circumstances (poor ventila­ 'UFO ' I couldn't detect anything. project. . . and no, you're not seeing dou­ tion). Although the curing fumes are non­ There is one more change that Bill and ble; this bird does have four wings. I'll let toxic, these fumes are very uncomfortable Bob Hunter made to their Hot Stuff line, but Larry explain: to many. These people cannot even be near it's not mentioned in any of their poop "W hat could be better than a biplane. . . typical cyanoacrylates in use, without dis­ sheets. I guess they were so pleased with except two bipes on one fuselage? comfort. If you or someone you know has a the new glue that they plumb forgot about "Seriously, it's a Wight Quadruplane, an sensitivity to instant glue, try 'UFO', the having put the stuff into dandy oval-shaped English design from 1916. As you can imag­ User-Friendly instant glue. containers. ine, only one was built, but it did fly at "Another unique quality o f'U FO ' is that it Now I normally use the 2-ounce bottles R.F.C. Test Fields during 1917 and 1918. will not attack white foam. Until now, the because they hold a lot and yet stay squeez­ "The model has a span of 57 inches, bonding of white foam has been a real limi­ able. But however convenient I thought the which is quarter scale. But the wing area tation of instant glues, which dissolved older soft, round bottles were, these new comes out to 15.5 square feet. Power will be white foam on contact. Since 'UFO' does oval-shaped ones are even easier to hold an S.T. 2500 with C&H electronic ignition. not attack white foam, it allows full joint and use. And, because they're not round, "Should be ready to test in 1989. . .and I coverage of all bonds, even foam to foam. they won't roll all over the bench or onto the guess you can understand why I have that This means that no areas of the bond are floor when knocked over. worried look on my face." dissolved, resulting in maximum strength. This new H ot Stuff is good stuff! Larry didn't say how well the original de­ The use of 'HOT SHOT' or 'KICK-IT' ac­ AEROBATICS sign flew, but I'd imagine that w ing align­ celerators speeds curing time. For maxi­ Most everything I've seen published ment and incidence angles would be prime mum bond strength do not use any type of concerns. By the time you read this, the primer with 'UFO '." Continued on page 71 Quadruplane should be ready for her maiden flight. TWICE-SIZED SAILPLANE Here's another super-sized flying machine from Al Doerr's workshop. He just couldn't resist taking Carl Goldberg’s beau­ tiful Sailplane and scaling it up by a factor of two. I didn't get much data except that this magnificent bird is hauled around by an O.S. FF-240, 2.4 cu. in. four-stroker. And in a recent phone conversation, Crash Evanson (who can't spell too well, but who can cram more coherent single­ spaced typing onto both sides of a sheet of paper than anyone else I know) informed me that Al Doerr's 1/2 scale Piper Cub built a few years ago found a good home in Is­ rael ... and is now flying quite well since being retrofitted with a new 100cc engine. Two questions immediately come to mind: Is the Cub flying better because this new engine is kosher? And has the plane becom e part of the Israeli A ir Force? UFO Like everyone else I couldn't help but no­ tice Satellite City's catchy "U FO " ads. Ac­ cording to the hype, their two new Hot Stuff As you can tell from the expression on Larry Ladd's face, he's not too sure what he's gotten products, "UFO " Thin and "UFO " Thick, himself into. His Wight Quadruplane is a 1/4-scale replica of a 1916 English fighter.

30 MODEL BUILDER BASIC MODE II CONTROL STICK POSITIONS FOR VARIOUS AEROBATIC MANEUVERS, as compiled by Tom Triol

j a j a I s J S I s I s LOMCEVAK WITHOUT L E F T SPIN 1. Left snap roll SN A P FIR ST

E l I S I s I s E f E l 2. Add down elevator RIGHT SNAP ROLL LEFT INVERTED SPIN

1 Π Μ Ρ Ε \ / Λ Ι ί 1 3 E f 0 j a RIGHT INVERTED SNAP ROLL 1. Normal spin E l E l I s j a R IG H T SPIN I s j a

2. Add power 1. Left snap roll

I S R 1 3 J 3 I S E f $ 3. Opposite aileron 2. Add down elev. & opp. aileron LEFT SNAP ROLL FLAT SPIN SEQUENCE LOMCEVAK

j a E f E f I S I s E l

RIGHT INVERTED SPIN LEFT INVERTED SNAP ROLL STEWART ROLL

Crash Evanson's 90-inch original doesn't have the smoothest lines in the world but really tears up the sky with a Cobalt 60 in the nose. A l Doerr did an especially nice job on this double-size (13 foot) G old­ Four years old, still looks new. berg Sailplane, powered by an O.S. FF-240 four-stroke.

MAY 1989 31 MODEL DESIGN & TECHNICAL STUFF By FRANCIS REYNOLDS

• In the December issue I mentioned Ro- same as "preliminary design" are "configu­ hacell foam, available from Composite ration studies." In doing these things right, Structures Technology, 3701 Inglewood sets of requirements, objectives and ground Ave., No. 268, Redondo Beach, California rules are formulated first. M odel designers 90278-1110. M attG ew ain, owner of Com po­ are frequently less formal than this, and Washington and can fly seaplanes from my site Structures was disappointed that I did may have only a mental or even subcons­ own dock; 2) The challenges of seaplane little more than tell you that Rohacell foam cious list of things they wish to accomplish design intrigue me because of the interest­ is expensive. He has a point. Rohacell is and rules they will abide by. I recommend ing interacting hydrostatic, hydrodynamic, rated at four to five times the compression getting it all down on paper. W h en we force and aerodynamic requirements; 3) Water is strength of other foams of equal density, ourselves to write, we must think, and a little bit softer than most land, and crash and it will take much higher temperatures thinking is a prerequisite to intelligent damage is som ewhat less, if I design well without softening. Matt also points out that designing. structurally; 4) No trees to hit (only boats); Rohacell is not dissolved by polyester resin and 5) No waiting for my frequency to be and other model adhesives and finishes “I asked myself the available, as I'm a safe distance from the lo­ that will dissolve the polystyrene foams. It is cal model field. like polyurethane foam in that respect, and question, 'Which are The word seaplane, incidentally, means also like polyurethane foam it should not "hydroaeroplane" and includes both float­ be cut with a hot wire because of toxic better, floatplanes or planes and flying boats. The distinction be­ vapors. It is available in many thicknesses, flying boats?’ Let us tween floatplanes and flying boats some­ and in two different densities. times disappears however. A single-float In past months we have looked at stabil­ try to apply the logic seaplane w here the float is an integral part ity, scaling and load factors, weight, for which we humans of the fuselage is a flying boat. If the single strength, materials, and composite struc­ float is mounted on struts, however, it tures. It is time for a change. are noted and find would be called a floatplane. W e can't say PRELIMINARY DESIGN that floatplanes must have two floats. Some Deciding what kind of an airplane one is out.” floatplanes, including my recent ones, have going to build is certainly a fun part as well SEAPLANE CONFIGURATION STUDIES three floats, and one of my seaplane de­ as very important part of the design process. Since R/C seaplane design is my special­ signs, called "Quadrafloat," had four. It is an area where the decisions may be ity, I w ill use it to illustrate the art of configu­ When I was a teenager, I designed and made purely by emotional preferences, ration study, as well as hopefully to contrib­ built a seaplane that wouldn't "plane off of (preferring biplanes over monoplanes, for ute some useful thoughts on my favorite the sea." The mistake I made was to use a example), or they may be made by high- type of model. To follow my own advice single main float and put the "wing" floats tech commercial projects, employing thou­ and put objectives on paper, I fly mostly R/C at the ends of the stabilizer. It seemed to sands of engineers and costing millions of seaplanes instead of landplanes because: 1) make sense to use the stab for float mount­ dollars. Other words meaning about the I live on Lake Sammamish in the state of ing, since it was already there. You guessed

Author's triple-float seaplane, "SA M II," uses the rear of the fuselage "Quadrafloat" features four separate floats; nose float is steerable like as the tail float. Model is actually an amphibian, has thin plastic a tricycle-gear landplane. Steerable nose float proved to be not as ef- wheels mounted on the two main floats. fective as a water rudder.

32 MODEL BUILDER Ultra-clean "Sea tract" features retracting floats (dark-colored areas Author's world endurance record attempt seaplane had stabilizing on side of nose). Small scale model was used to develop the retract floats (sponsons?) attached to the fuselage instead of the wing. Flew mechanism geometry. well, but radio problems did it in. it: inadequate stability on the water. The an advocate of it. You have probably no­ least little cross-wind would blow it over ticed photos of the Proctor Antic and other onto a w ing tip and it could not recover. (usually antique) models on three floats. This lesson, like many others I have One of the accompanying photos shows learned, had enough pain content that it "Sam II," one of my three-floaters. You can't won't be forgotten. find the third float? It is the rear of the FLOATPLANES fuselage. The floats of most floatplanes are de­ Incidentally, Sam II is an amphibian with signed to completely support the airplane fixed wheels. You may be able to see one of on the water. I think this is a mistake. In or­ the thin transparent plastic wheels in the der for twin floats to hold the tail of the air­ photo if it doesn't get washed out in the plane out of the water, they must have con­ printing. The plane in the photo that heads siderable displacement (therefore added this column every month is also one of my weight and drag) aft of the step. "Considera­ fixed-wheel amphibs. For an explanation, ble" because the moment arm between the see my construction article in the Decem­ aircraft's balance point and this tail­ ber 1986 issue of RCM. supporting volume is very short. Further­ Three floats instead of two, that is, two more, if we use conventional twin floats, a main floats and a tail float, have less weight water rudder extension of the aero rudder and drag than regular twin floats because Photo from 1940 shows our columnist with an usually doesn't work w ell— if at all. It needs the main floats are much smaller and only a 8-foot, Super Cyclone powered F/F flying to be too long to reach the water, and any very small tail float, if any, is required. O n boat. Took off easily but proved to be spiral­ pitching of the plane in waves makes the the main floats, we can eliminate every­ ly unstable. water rudder's penetration anything but thing aft of the step, which amounts to a With the rudder down at water level, we constant. Sure, we can put a water rudder third or more of the total float volume. have a perfect setup for a water rudder ex­ on one or both floats, but that is extra me­ Since the "step" is now at the aft end of the tension of the aero rudder. O u r triple-float configuration is comparable to a taildragger with a steerable tail wheel. The customary twin-float arrangement performs more like a tricycle gear job, but without the advan­ tage of a steerable nose wheel. M y Quad- rafloat had a steerable nose float. It worked, but not as well or as sim ply as the three-float configuration with a water rudder. I also built an R/C model of the 1910 Fabre Hydra- vion canard with a steerable nose float. (See my construction article in the March 1984 issue of Model Builder.) The question I asked myself, and the one I'm sure some of you are asking at this point is, "How come?" How come the only triple­ float designs we see are a few antiques? High-performance "Sea Era" flying boat by Paul Weston uses the bottom of the wing itself for How come modern designers always de­ flotation, doing away with conventional tip floats. sign twin-float planes if triple-float planes chanism, weight, and drag. Another prob­ float, it is no longer a true step but a are better? Designers are no doubt in­ lem area on conventional floats is the steps. transom. As such, it is easier to make, and fluenced by tradition, but I think the chief They are a bit hard to build, need to be deep can be aerodynamically streamlined (from reason for the preponderance of twin-float and/or ventilated for good hydrodynamic above). jobs is that these planes weren't originally performance, and have high aerodynamic The tail float is attached to the aft end of designed as floatplanes at all but as land- drag. the fuselage, or better yet it is the aft part of planes. There is seldom enough market for TRIPLE-FLOAT SEAPLANES the fuselage. The plane w ill now sit at a seaplanes to justify a strictly seaplane de­ By designing and building our float­ positive angle on the water both statically sign. (W hen there is, the plane usually ends planes with three floats instead of two, we and at idling taxi speeds. This provides up a flying boat. That comes next.) Most can reduce or eliminate all of the above plenty of rotation angle for takeoff and land­ twin-float seaplanes are landplanes with problems. I'm not the originator of the ing, and like taildragger landplanes, it pro­ triple-float configuration, but I'm certainly vides more prop clearance at low speeds. Continued on page 84

MAY 1989 33 Airtronics, Inc. Introduced as a concept prototype last April at the Toledo Show, shown again as a prototype at the Chicago Model and Hobby Show in October, and finally shown as a production model at this year's IMS, the all By BILLFORREY new Vision 8SP radio was on working dis­ A look at play. Available now through normal chan­ IMS Pasadena ’89 mediate to advanced sailplane flyer total nels (i.e., local dealers, mail order houses, flexibility in fine tuning aircraft handling. etc.), the Vision 8SP looks like it's going to • The 1989 International M odeler Show With this radio you have your choice of be the number one gun with contest or per­ was held this past January in Pasadena, linear or exponential throws with dual rate formance minded sailplane modelers. California. For model sailplane enthusiasts capability in either case on the three basic Very similar in basic function to the Ace who attended, it was a virtual treasure chest functions. All eight individual servo end radio just mentioned, the Vision 8SP uses of old and new models. There were so many points are fully adjustable in hundredths of the well-proven "ATRCS" (pronounced "A- sailplanes at this show that my original am­ a second pulse width from .90 up to the tracs") microprocessor computer developed bitious intention to completely cover all of neutral point (1.5) and from 2.10 down to them here had to be abandoned. This is the neutral point (1.5). All mixing functions quite a contrast to previous hobby shows of are adjustable in one percent increments 1988. from 0 % (no mixing) to 100% mixing. Mix­ Hopefully avoiding any favortism in this ing functions can be engaged or disen­ report, I'll simply report on as many exhibi­ gaged using an external switch. Mixing tors as I can in alphabetical order starting functions are programmed using the actual with A and ending with U. sticks w hich w ill be used in flight as value Ace R/C, Inc. changers on the buttonless, single line, LCD Big news in this booth on two fronts. First readout. Memory for four different aircraft off, Ace has purchased all the kit manufac­ setups is on hand via a four-position rotary turing rights to the O ff the Ground M odels switch atop the TX case. A built-in clock sailplanes and power planes. The AMA w ill keep track of total on-time since last Nats winning Prodigy, the relatively new, charge. Ace is planning to add a count-up high performance Quasoar foam and fiber­ or count-down stopwatch also. Externally, glass contest ship, and the Skyhawk trainer this sophisticated transmitter is a Silver Combat Models' F-16 displayed in the ASD are the three of greatest interest to my read­ Seven lookalike, with the exception of the booth is one of the best power scale slopers. ers. Prices may change a little to keep the LCD display, of course. by Control Systems Laboratories. The line profitable for Ace and allow for dealers Available by April 1989, this rig will be ATRCS LCD control panel with its six push to make a fair margin, but the overall care coming with Ace's 1991 quality "1991" buttons does all the programming, from and quality of the kits w ill remain very high. seven-channel AM receiver and four servos. servo reversing and end point adjustment to The other news regards radios. As yet un­ It is expected to fall in the $500 range. (Later multi-function mixing. Access protection named, Ace's newest eight-channel rig uses versions will be available in 1991 FM.) Con­ levels keep unwanted "users" from tamper­ a microprocessor computer to mix any tact Ace R/C for more information: 116 W. ing with your aircraft's mixing programs. Ex­ channel with any other channel(s) stacked 19th Street, Higginsville, Missouri 64037, perimenting with a new mixing setup can up as deep as you wish. This gives the inter- (816) 584-7121. be made safer with the use of the "alternate

Rollin Klingberg (left) and ASD'sGary Anderson with Future Flight's High-performance "R otor" slope machine by Ken Stuhr uses pivoting latest: 82, Terrific Trainer (background), and Klingberg Wing. wings to achieve the effects of ailerons and elevator.

Bob Martin's "Bobcat" aileron ship is as popular as ever. Bob reports Eagle SI A RF sailplane imported from Taiwan by Cermark Electronic his famous Ouralene fuselages w ill be back in production soon. & Model Supply Co. Also comes in electric or gas versions.

34 MODEL BUILDER Hobby Lobby's Dave Martin displays his Electro-UHU imported from Sheryl Hambelton, DCU owner Mark Hambelton's better half, shows Germany. A highly successful, high-performance motorglider. off DCU's "Stryker" (left) and Dragon Fly. Super Dragon Fly in back. setup" switch which can engage or disen­ Per square foot, there were more sail­ gage a new setup at will. Memory for four planes in the ASD booth than any other at sailplane setups is provided. A three- the IM S. I w ill not be able to list them all position switch allows for three preset ele­ here, but I will try to highlight some of the vator trims (these could be set up for most interesting ones. launch/thermal, cruise, and speed). Mode Rollin Klingberg of Future Flight was pre­ I, II, or III stick configurations are easily sent in the A SD booth with a couple of new changed by the user. Dual rate switches are surprises. All charged up from his highly provided for aileron and elevator controls, successful first year of marketing the Kling­ as is a fully progammable exponential berg Wing, Rol came back to the IMS with capability. what he hopes is a successful new ap­ The Vision comes with an AMA type proach to the two-meter trainer market. 1991 certified seven-channel PCM receiver. The Terrific Trainer ("TT") as it is called, is Airtronics is the first (and to my knowledge, a nice looking, simple to build, versatile lit­ the only) manufacturer to comply with the tle model of 72-inch span. It is intended to AM A Frequency Committee's 1988 recom­ be flown either as a thermal or slope glider, mendation for tighter 1991 specifications as an electric motorglider, or as an .049 gas than those legislated by the FCC. The Vi­ powered motorglider. It has a wing area of sion transmitter is 1991 "gold stickered" for 420 square inches, a flying weight as a use on either simple FM (PPM) or FM/PCM. glider of 20 ounces, and 30 (claimed) Switched to FM carrier, the optional Air­ ounces as an electric motorglider using six tronics 1991 micro FM receiver can be Robert and Larry Pettyjohn are the fellows 800 mAh cells and a Kyosho AP-29 motor. used. kitting the Cheetah. New molds and molding I'm guessing that the TT has about 60 High capacity 700 mAh SCE Ni-Cds are process result in much improved fuselages. pieces to assemble to complete the basic standard equipment for Tx and Rx. The sys­ 92718, (714)830-8769. Look for a full prod­ airframe. This is about 1/3 as many as the tem will be available with your choice of uct review on the Vision 8SP here in M od el usual trainer kit. The wings are four panels (probably) three different servos, four stan­ B u ild e r in the next few issues. of molded white foam with balsa spar caps dard servos, four ball bearing micro servos, American Sailplane Designs and trailing edge pieces. The fuselage is a or four high- speed competition servos. Ask This company specializes in all forms of simple box structure with plywood dou­ your favorite supplier which types he can model sailplanes, including a few non-R/C blers front and rear. The tail surfaces are get you. The typical selling price on the Vi­ ones! ASD is a mail order company which sheet balsa. The whole basic glider assem­ sion 8SP w ill start at about $550. M ore in­ manufactures and distributes to the public. bly process should only take about one day. formation may be obtained by contacting If it glides, Gary Anderson of ASD probably The most outstanding thing about the TT Airtronics: 11 Autry, Irvine, California carries it! is its instruction booklet. It is 40 pages long

John Pond's Old Tim e Plan Service has plans for several pre-war glid­ Neat two-channel A R F electric motorglider, the "RC-Uno-E,"display- ers such as the Frank Zaic "Flo ate r” shown here. ed by John Gill of Robbe Model Sport.

MAY 1989 35 Two sailplanes displayed in the Hobby Shack/Global Hobby Distributors booth were the Mini-Racer (left) and Sitar Special 100, both imported from Sailplanes International. Mini-Racer would make a good aileron transition model: Sitar Special is an all-out F3B or F3F machine. and is a very complete supplement to the stability. full-size plans. This booklet guides the ab­ Expect to wait for this project, if it tickles solute rank beginner from his selection of your fancy. Rol says this is likely to be a glues and tools through radios, safety, re­ 1990 kit. pairs, and reference books for learning The other kit prototype is an all balsa and more about the subject of building and fly­ ply, X-wing canard model for gas power or ing models. It has photo illustrations motorless slope soaring. It has a 36-inch throughout and a very nice exploded iso­ wingspan (upper and lower), a five-inch metric view of the kit as it goes together. constant chord wing (upper and lower), and There is even a section devoted to electric a 20 ounce glider flying weight. An .049 en­ and gas motorglider conversions. gine will be needed for the motorglider The Terrific Trainer comes with complete version. hardware (even rubber bands!) and sells for The X-winger w ill be called the X-cel. $39.95 suggested retail. It is available at Don't expect it to be available as a kit until your local hobby shop or favorite mail order about Christmas of this year. It is expected

JA D E models included (from top):the Equis, Toucan and a gas-powered Telos canard.

Cliff Hanger Models is getting into the power scale slope movement full bore. Steve Peacock (left) and Marty Silberstein are currently producing half a dozen kits, with more planned. house. to com e in at about $35 to $40 retail. Next we were shown a prototype model The ASD booth was also home to Ken for a potential power scale slope glider kit. Stuhr and his VS Sailplanes “ Rotor." This is a Inspired by the recent unveiling of the top really slick, 58-inch span, pitcheron con­ secret B2 Stealth Bomber and information trol, aerobatic slope racer. The wings are gleaned in an Aviation Week magazine arti­ the only surfaces that move, the T-tail being cle, Rol decided it was next on his list! bolted on tightly and immobile. Both pitch The full-size B2 has a span of 172 feet and and roll functions are handled by the wings. Richard Jarel of JA D E shows off "Shogun" an overall length of 69 feet. The model B2 is The Rotor is built from conventional sloper, will probably be the next JA D E kit. scaled down 1/30th to a wingspan of 5.75 slope ship type materials: blue foam core length; 6.5-inch root chord; 4.5-inch tip feet. Incredibly, the model B2 has a wing wings, obechi veneer, spruce leading chord; 11:1 aspect ratio; 305 square inches area of 1100 square inches! The basic struc­ edges, lite ply fuselage, and balsa tail sur­ of wing area; thinned Eppler 374 airfoil ture is foam and balsa w hich gives it a total faces. The Rotor is actually a very simple (7.5%); 31 ounce flying weight; 15 oz./sq. ft. weight of about four pounds. model. The plan shows how to achieve the w ing loading; two 50 oz.-in. servos re­ Four test flights have shown that some pitcheron control with or without elec­ quired. Call ASD for current price and ship­ minor modifications will need to be made tronic mixing. ping charges. to make the model B2 more commercially The specifications for the Rotor tell much Other models present in the ASD booth acceptable. Am ong these mods was the ad­ of the rest of the story: 58- inch wingspan were the Whitney Models Paraphrase dition of more tip washout for better (optional 78-inch wings available); 44-inch RCHLG, the Combat Models F-16 power

36 MODEL BUILDER this they w ill be turning out parts. The Katie cludes a motor, prop adaptor, spinner, fold­ II will have a sleeker appearance (maybe it ing prop, and a w ire harness w hich appears should be called the Katie III?), the Coyote to include micro switch, toggle switch, and aerobatic sloper should be back in produc­ Tamiya style plug. This is a very complete tion as should the Griffin II flying wing. package at a very reasonable price of M any of your favorite indestructible re­ $129.95. The SI version goes for $109.95. placement fuselages will once again be The Lynx 140 has appeared in these available: Olympic 650 or Wanderer type, pages once before. It is a 9 5 % RTF, wood and Paragon or O ly II type. and foam core, three-channel, aerobatic These Duralene fuselages will join the al­ slope sailplane that is attractively covered ready very popular line of wood kits includ­ in a four-color M onoKote scheme. It uses ing the Bobcat aileron trainer, the Pussycat aileron, rudder, and elevator controls, has a basic trainer, and the hot dog sloper Talon. If you need further information or a flyer on the Martin sailplanes, call: (602)855-6900. Cermark Electronic & Model Supply Co. Cermark is a Fullerton, California based mail order company and hobby wholesaler. It had one new and one not-quite new sail­ plane revolving on a display tree inside its booth at the IMS. These were the Lynx 140 imported from Thailand, and the Eagle se­ ries of gliders and motorgliders imported Possible future Sig kit is the "N inja" slope gli­ from Taiwan. Both looked like very good der, here displayed by Hazel Sig-Hester. quality models. scale slope model, and a nifty little all­ The new Eagle series includes the SI ver­ foam free flight sailplane which some peo­ sion for soaring, the EP version for electric ple believe might make a unique little power motorgliding, and the IE version for single-channel R/C slope flier. Call Gary internal combustion engines (.049). Each of Anderson about any of these models and the Eagles is fully built from balsa and ply he'll be glad to fill you in on any missingde- and covered in a very attractive, neatly and tails: ASD, 2626 Coronado Ave., No. 89, colorfully silk screened vinyl film. Assem­ San Diego, California 92154, bly should only take one hour, two hours (619)429-8281. for the electric version. Bob Martin R/C Models Specifications for the Eagles are: 67 inch Charlie Morey iseditor/publisher of Slope Soar­ Bob Martin says he’s just about ready to wingspan; 494 sq.in. wing area; 37 inch ing News. Text has subscription info, crank up production on his famous Dura- length, and 30-37 oz. flying weight (electric span of 56 inches, and weighs 27 ounces. It lene fuselages once again. The new molds power version). The Eagles are your basic is currently going for a sale price of $119.95 and molding facility in his relatively new flat-bottom wing, rudder/elevator trainer (norm ally $129.95) w hich is a real bargain Lake Havasu, Arizona, manufacturing plant types. The Eagle EP would require a third considering the quality and how very little are almost done, and by the time you read channel for motor on-off control. The EP in­ work is remaining to get the Lynx 140 airborne! Contact Cermark at P.O. Box 2406, 107 Edward Avenue, Fullerton, California 92633, (714)680-5888, for more informa­ tion and a free product flyer. Cheetah Models Cheetah Models has made a good thing even better with the announcement of im­ proved molds and part pulling for its Cheetah and Super Cheetah slope combat or aileron trainer models. W all thickness of the indestructible plastic over the entire length of the fuselage has been nearly dou­ bled without adding any extra weight. How Scale sailplanes can be documented easily by using the color Foto-Paaks from Scale Model Re­ search. Above example is a Schleicher ES-49, built in the early 1950's. Continued on page 92

Steve Grochowski of Sun Fair Aircraft Designs shows his new "Split- The U.S. F3B Soaring team, from left: Larry Jolly, Don Edberg (man­ Image" basic/advanced trainer. Kit includes two different wings. ager), Richard Tiltman (asst, manager), and Rich Spicer.

MAY 1989 37 1. Photo taken in John Pond's room the night before last year's SAM 49 Fall meet shows Pond (right) and Phil Bernhardt trying to get some 2. Getting the cumbersome Folly weighed in was a bit of a chore, took last-minute work done on John's Folly II while hecklers Ken Myers both Myers and Bernhardt to do the job. Twelve-foot model checked and Marge Bernhardt (back to camera) clown with the Folly's cowl. in at 12 pounds. the model! This was confirmed at breakfast the next morning. At the field a round two-ounce Sullivan tank was commandeered and in­ stalled. Everything worked! Now to enter the monster! Photo No. 2 shows the problems of weigh-in. W ith such a huge wing, the exist­ ing cantilever weighing arm and scale had I ' pm By JOHN POND m m to be disconnected and two people em­ ployed. With the huge wing area (slightly less than 20 square feet) and a flying weight • Continuing with the idea that Old Timers installation team of Steve Roselle, Ken of around 12 pounds, the model made should be fun, we again engage in a de­ Myers, and John Pond to get the Folly ready. weight by only six ounces! This meant, with scription of a kind of model flying that most It wasn't all hard going as seen in Photo No. an ignition engine, that the model received every competitor has gone through at one 1, with Ken Myers clowning with the Folly 4cc per pound, or 48cc total! With such a time or another. This columnist calls this cowl, which is loaded with two pounds of load of fuel, get the calendar, not a timer! the "Midnight Ace." This is where most of lead ballast. Actually looked somewhat like The engine ran and performed very well. the night is spent getting a model ready for a fez. The model rose gracefully into the soft next day's flying. About one a.m., the bleary-eyed group breeze and climbed gently. Of course, It recently happened to us in November finished the job and left for their respective Myers was on hand to watch his rare O.S. of last year, when SAM 49's Ken Myers con­ rooms. At about three a.m., this columnist engine perform with many admonishments fided that he had a rare O.S. .90 four-cycle sat bolt upright from a sound sleep with the not to have a "thumb glitch." open rocker engine, eligible for the SAM realization that I didn't bring a fuel tank for The O.S. .90 was disappointing in that it 60% rule. This meant the engine would be classified as .54 cu. in. displacement. Upon discovering this item, an arrangement was made to utilize this engine in the colum­ nist's twelve-foot Folly II that had been flown about four years ago and shelved for lack of power, and to fly it at the SAM 49 Fall Annual. Phil Bernhardt of 77 Products got into the act and converted the engine to spark igni­ tion. Here was a distinct threat for the Tex­ aco event. The model was pulled down from the rafters and found to be in good shape. Packing was something else as the one-piece twelve-foot wing barely fit in­ side the Ford LTD Crown Victoria station wagon. Friday night at Taft was the usual early hospitality gathering at Jack Albrecht's room for the serving of "cheese, cerveza, and vino." During dinner some "careful planning" resulted in taking a group back to Pond's room for installation of the ignition system, which had not been installed due to lack of time. O f course, the coil being one of the tran­ sistorized models sold by 77 Products 3. Completely busted in half I There are, however, some practical aspects of the crash as Charlie meant that Phil Bernhardt would lead the Critch uses the forward section as a beer stand.

38 MODEL BUILDER 4. R/C O.T. gliders, anyone? Seen here is Bob Munn preparing to 5. A rare one! S A M 51’s Brad Allen re-created Joe Weathers' "Go- launch Dick Bringgold's Beaumont Soaring Champ at SAM 49 meet. Getter" for R/C 05 Electric. Surprisingly good performance. was not as econom ical as hoped. After only Undeterred, Myers and Pond are now depicts Bob Munn of SAM 41 holding a a six-minute run the tank was empty. The planning to reactivate the columnist's huge Beaumont Soaring Champ built and flown model exhibited an excellent slow glide in 10-foot "Super Clipper" that used to fly by Dick Bringgold of SAM 31, Arizona. the early morning and for its first flight did a quite well with a glow version of an O.S. .60 This good looking gl ider is going through creditable 16 minutes plus. four-cycle. Being slightly underpowered its trimming pains and structural revisions Encouraged by this flight, our redoubt­ with this setup, the O.S. .90 is confidently needed to accommodate radio and the able heroes immediately fueled up for an­ hoped to be a first-class threat, with the stress of the high-start. D ick is getting closer other flight. After a minute and a half the model's super glide resembling that of a all the time! engine quit; later investigation revealed Valkyrie. O.T. ELECTRIC the point lead had fatigued. Regardless, the The main purpose in presenting this saga Photo No. 5 is a shot of a little-seen 1940 model still hung in the low lift until a stall is to again prove that more fun is derived design, the Elbert Weathers "Go-Getter." This model is unique in that it features swept-forward wings and a fully enclosed engine (in this case, an 05 electric motor). Brad Allen, holding the model, reports the model is surprisingly stable. Further flying reports will be run in this column. As proposed by Jack Alten of SAM 21, a new special competition class of electric O ld Timers is being introduced for larger electric power systems. This event, called Class B Electric, is being spearheaded by Alten in the north and by Ken Myers in the south. For those who read the saga of "Flat Tires" Myers several issues ago, Ken is seen in Photo No. 6 with an electric powered

6. Good shot of "flat tires" Myers, shown working on his electric Playboy Cabin at Taft. Ken is a very enthusiastic R/C O.T. flier and is currently president of SAM 49. developed that Pond was unable to recover from flying big, slow models, this one going from. The model hit rather convincingly to the extreme end of the spectrum. with considerable damage to the fuselage. Contest-wise, what else can you say Inspection showed that the two-pound when Don Bekins takes three firsts, two sec­ cowl had fallen off during the flight, making onds, and two thirds in seven events en­ the model grossly tail-heavy. tered? What a performance! W e could list Phil Bernhardt retrieved the model, it the results but suffice to say that Lanzo breaking completely in half while bringing Bombers took fifteen of the first three posi­ it back. Photo No. 3 shows Charlie Critch tions in eight events. Fifteen out of a possi­ with a very practical bent of mind using the ble 24 is a tremendous tribute to the flying forward part of the fuselage as a beer stand. ability of this design. 7. Ted Houston stands guard over his Father In the background is Pond disassembling Another photo of one of the more inter­ Ed's Lanzo Record Breaker. With a hot Hor­ the Folly for shipment home. esting events is presented. Photo No. 4 net 60 this ship really moves.

MAY 1989 39 For quite some time, the engines were turned out in glow versions with the lugs and fixtures on the castings for the ignition timer housing. Finding one of the old "G lo w Torps" nowadays is a real bonanza as it is no great trick to convert them back to ig­ nition. Conversions are still being made by Les Payne, 881 S. Josephine, Denver, Colo­ rado 80209. Comparing the sizes of the 24 and 29 Torpedo engines, one finds the 24 weighed 5.75 ounces while the 29 was 6 ounces. The 24 had a bore of .662 and stroke of .729, w hile the 29 had a bore of .725 and a stroke of .724. The 32 was a slightly bored 29. Needless to say, all engines ran excellently. The engines were die-cast from light­ weight aluminum alloy, the major parts be­ ing the crankcase, cylinder head and con­ 8. Just one of many competitive Chet Lanzo designs is this RC-1 built by Bob Grice of SAM necting rod. Naval bronze was provided for 51. Uses a Saito 65 four-stroke for good climb. crankshaft and conrod bearings. The piston Leisure Playboy Cabin. Myers always brings line. This engine has been the most copied was machined from Mehanite bar stock, his fold-out picnic type table for his work motor of all. ground and lapped to each cylinder. The area. In this month's write-up we have crankshaft was manufactured from high About this time, this writer also received presented the 24, 29, and 32 Torpedo en­ a letter from Bill Preston, a member of SAM gines as a group, as they were basically all 8 in Washington, suggesting a larger elec­ derived from the 29 case. As noted on the tric event. Those interested in such an event engine drawing, the only Torpedo engine will find the standard Playboy Senior makes carrying an engine displacement size was an excellent starting machine. the 32. This was done as the 29 and 32 were In a nutshell, this new proposed Electric practically identical in outward class differs from the 05 Electric event we fly appearance. on the West Coast in that 12 to 14 cells are K&B (Lud Kading and John Brodbeck) specified, with a maximum capacity of 900 were exceptionally successful with sales of mAh; the motor definitions have been com ­ their engines. No effort was spared to in­ pletely rewritten to allow any type of read­ troduce the engine to the modelers as at ily available motor; proportional speed least one of the partners would be seen at a controls are now allowed; and motor runs major meet answering questions, repairing have been changed to 60 seconds for both engines, and giving advice and info on the cobalt and ferrite. Sounds like another fun running traits and methods of handling the event! Torpedo. ENGINE OF THE MONTH The Torpedo was popular enough as an No finer tribute could be paid to the ignition engine, but when the glow plug 9. Runner-up R/C sweepstakes winner at last genius of Bill Atwood than the longevity of was introduced it was found that the engine year's SAM Champs was Joe Percy, of Texas, the Torpedo. Credit also goes to Johnny adapted itself to nitrated fuel beautifully. seen here with hot Class B Kerswap. Brodbeck for the continued improvement and manufacture of the ongoing Torpedo

10. Bill Paget (left) and Larry Jenno, photo­ graphed in Seattle in 1945 with a Consolidat­ ed "Roam er," previously called the "Pursuit- aire” and kitted by Model Developments, Inc.

40 MODEL BUILDER 11. Don Lefferts produced this good-looking Belgian "Corsaire," mod· 13. Sune Stark (right) readies his original 1950 Wakefield design while ified with a different airfoil and ailerons. Uses Laser 61 four-stroke. Ake Roggentin holds. Sune was 1951 Wakefield champ. tensile steel, hardened and ground to preci­ writes to say that fifty years ago he was a 14- w ould place as the auditorium's hard- sion tolerances. year-old youngster at Lane Tech High backed seats were murder on the leading The gas tank was a formed magnesium School in Chicago. edges of the gliders and at times snapped pressure casting complete with Gits filler 'This school was located right across the the tail boom. Paper R.O.G. models were cap. An enclosed timer was employed to street from Carl Goldberg's M odel Research also flown. Only one drawback: if you flew keep the points free of dirt and grit, even in Laboratory (M RL) w hich specialized in that too close to the 10 ft. square ceiling exhaust crackups. Cast from aluminum, the timer fabulous MRL brown rubber. This writer fan, the model stuck to the grille until the case featured a unique adjustment point hasn't seen anything like that since. fans were turned off at 6 p.m. setting. "Earlier, I belonged to the Hearst "At M RL, all the talk was about the Prices in 1948 for the Torpedo 24 were newspaper syndicated column, The Junior Chicago Aeronuts. They held their meet­ $16.50, and $18.50 for the 29. At this time, Birdmen.' I attended their indoor contests ings at Gage Park on the south side, about a they were sold minus coil and condenser, arriving by streetcar. I designed and built a half hour ride on the streetcar. I started to at­ giving the modeler the option of running seven-and-a-half foot gas model that I tend meetings in the Fall of 1938. Wally glow or spark. In addition, a special high- called the 'Miss Chicago' using a Brown Jr. Simmers was President that year. O ther fa­ compression glow head was marketed for for power. I figured if Maxwell Bassett could mous members included Carl Goldberg, Ed $1.25. call his models the Miss Philadelphia, I Lidgard, Milt Huguelot, W ally Fromm, Pete Strobatic tests by the A ir Trails test team could do no less. This model only flew Vacco, Sid Axelrod, Jerry Ritz, Dick Obar- gave figures on the Torpedo 29 of 8,000 rpm three or four times. ski, and others I had read about. What a thrill for a frosh! "At that time, to becom e an Aeronut member, one had to pass certain flight re­ quirements. Took me a year and a half to meet the Junior requirement in indoor HLG. In doing so, I broke HugueloFs Junior Class A record. At that time, the Chicago Aeronuts held more National records than any other club. "I was pleased to read Al Ward's com­ ments of early Chicago modeling as I had not known his whereabouts for the past 30 years. Al got my address from Bill Baker and wrote. W e graduated in the same class from Lane H.S." SLA M C LU B Finally heard from Lin Haslin, the spark plug of the Salt Lake Antique Modelers, in the form of a single-sheet newsletter called The Condenser. Lin sent in some info on the club's activities, ranging from a "W eenie Roast" to glider and gas events. 12. Gorgeous R/C Red Zephyr by Bruce Thompson of Toronto, Canada. Note the faithful re­ O f special notice is the new flying site, production of the original trim scheme. the Watts-Whitney pasture, one-half mile with a Ritz 11x5 prop, 7,800 rpm using a 'The Lane High School had an active east of the KSL towers. Their present fun 10x8 M ercury prop, and 10,400 rpm em­ model airplane club. Milton Huguelot was meet w ill start at 4:00 p.m. and close when ploying an 8x10 High Thrust propeller. a senior and the 1938 Nationals Cham p at dark. . .then the w eenie roast! They have Factory recommendations for propellers the age of 16. Barney McShane was Presi­ the right idea; concentrate on fun! were an 11x6 for free flight use and a 9x10 dent and built the third Zipper ever made. PHOTOS, PHOTOS, PHOTOS for control line stunt flying. Regardless of M ark H eller and D. Deschick (third in the Everyone wants to get his picture in the the style of flying, one could not go wrong 1938 Nats gas event) were sophomores. paper and this writer does the best he can to with a "Torp." "Meetings were held once a week and accommodate all. FIFTY YEARS AGO, I W A S... gliders were flown every day after classes in As a follow-on to the SAM 49 Annual re­ Encouraged by the comments of Al Ward the fifty-foot high auditorium. Contests port, Photo No. 7 is submitted of former about flying in Chicago, Otto E. Curth of were scheduled on a two to three week ba­ SA M 49 President Ed Houston's son, Ted, 2107 Center St., Northbrook, IL 60062, sis. Generally times of 40 to 44 seconds with a Lanzo Record Breaker. Ed won the

MAY 1989 41 this really puts the onus on me. "Sometim es I wonder if I w ill ever get caught upas no one can realize the amount of time I spend on not only new engines, but a terrific backlog of Browns and others to be repaired and overhauled. Enough of this, let's get to the engine status. "Bunch engines: I am about halfway through the order list, with 170 engines shipped. I don't dare run any advertise­ ments on these engines as most fellows are not aware of my system. Takes time (like a year or two) until I get really rolling. "M y progress with the Bunch engines has been good but slow. The Bunch engine was a much more difficult engine to make than I anticipated. As an example, I was able to ship 30 to 40 Ohlsson engines per month but am only producing 16 Bunch engines per month. Matter of fact, some months only show 10 shipped. The good news is that this engine is great, runs very well and smooth. I consider it a pleasure to provide 14. A nice building job on this R/C Scientific Flagship by SAM 53's Mark Glammier. Mark says these engines to those who have been so the ship Dutch-rolls like crazy. Does anyone know of a SAM legal cure for this? Mark would patient. sure like to hear from you! "Right now, Bunch engines can be or­ Pure Antique event with this model using Worth, Texas. Joe is seen holding his suc­ dered but will receive a number which puts an ignition Hornet for power and registered cessful Class B Kerswap. Joe has always the buyer on a 'waiT status. Sooner or later, a perfect score of 30:00. Beat Don Bekins placed with this hot model. they all get their engine. by two seconds! HERB'S MODEL MOTORS "Brow n Jr: I am still providing the Brown, O n thing for sure at O.T. R/C contests, In response to my request, Herb W ahl of but only the Custom or Special models. I Lanzo designs dominate the field in win­ Herb's Model Motors has written me a four- keep a small order list for them at all times. ning. Bob Grice's RC-1 is shown in Photo page letter describing what engines are I work, time permitting, on the parts No. 8, powered by a four-stroke Saito 65. available, time interval on delivery, produc­ needed to finish a group of 4 0 .1 will prob­ This pic was taken at the 1988 SA M 26 Pond tion figures, etc. Needless to say, Herb is ably fit these between the Bunch engines Commemorative at Taft. busier than a one-legged man in a rump and possibly have some ready in the next About time we got around to acknowl­ kicking contest! His letter has been edited three months. As it stands, there are only 20 edging one of the big winners of the R/C and here is what Herb has to say: engines on order, so for a change, I will ac­ portion of the O ld Timer Cham pionships at "Just got through working on the lathe at tually have a small stock on hand. Lawrenceville, Illinois. Seen in Photo No. 9 1:30 a.m.; have been at it since 9:00 a.m. "M y new Brown engines have a different is Joe Percy, one of the very active members Just another typical day! With the loss of of SAM 29, the "Planesm en" out of Fort two men (one died and the other retired), Continued on page 88 G.E. “CABINETTE”

Designed by Frank Ehling Plans drawn by Al Novotnik •

Wingspan ...... 36-1/2 in. Planform Wing Area.. .. 192 sq. in. Overall Length...... 23 in.

• It's unfortunate, in a way, that SAM Old Timer competition is 100% duration tion, the latter being done to effectively would be a cinch. oriented, because it means that scores of in­ shorten the nose moment for better pitch The cowl that draftsman Al Novotnik has teresting, eligible models are dismissed as stability. Original power was an Atom .09. shown is the sexier of the two d ifferent ones being "uncompetitive" and never get built. No one would build the Cabinette for included on the original plan. The original One such example is the model we're serious O.T. F/F competition today, but as a photos show the engine completely un- featuring this month, Frank Ehling's G.E. small-field 1/2A F/F sport flier it would be cowled, which looks OK because the un­ "Cabinette," from the June 1942 issue of hard to beat. It might have some potential as usually tall Atom dominates the w hole fire­ Model Airplane News. This is a classic little an R/C 1/2A Texaco model— a 2 0 % enlarge­ wall. With a smaller 1/2A engine you might three-foot cabin ship with a distinctive ment would put it right in the ballpark— and want to add som ething in the way of a cowl, razorback fuselage, oversize wheels and a with the already V'd stabilizer and full- if for no other reason than to avoid a "sawed cut-in leading edge at the w ing center sec­ depth fin, the addition of control surfaces off" appearance. ·

42 MODEL BUILDER MAY 1989 FULL-SIZE PLANS AVAILABLE - SEE PAGE 106 43 PRODUCTS IN USE Davey Systems’ Cessna 150 By DICK MASON PHOTOS: SKIP RUFF & ALAN DAVIS

• Everyone involved in full-size flying pieces were punched out, I noticed very lit­ ing a very strong wing. Aileron bellcranks knows the Cessna 150 and the role it has tle wood was wasted, something very im­ and flap torque rods are then installed. played in teaching beginning pilots to fly. portant in today's shrinking supply of The fuselage construction is as simple as M any have sat shoulder-to-shoulder with choice balsawood. any trainer. Here again, if you follow the in­ their instructor to sweat out those first take­ Both vertical and horizontal tail pieces structions the construction is quick and offs and landings. The Cessna 150 does for were of 1/4-inch thick balsa rather than the straight. W h e n all the 3/8-inch triangle the flying public what the basic trainer does 3/16 you norm ally find on a plane this size. stock and 1/4-inch fillers have been added for the military. Its generous wing area, This makes shaping and hinging much eas­ and sanded, the Cessna 150 shape begins tricycle landing gear, and forgiving nature ier. All kit pieces fit together well, and care­ to show. have made it everyone's favorite. The sub­ ful cutting of the sheet material supplied Weight was a consideration because of ject of this review is a stand-off scale model will produce just enough wood to go the small four-stroke engine to be used, but of the C-150, complete with flaps, as origi­ around. The manufacturer'schoiceofwood when finished the airframe was light and nally kitted by Cham pion M odels and now for each particular area was good, except extremely strong. being produced by Davey Systems Corp. for the fuselage bottom sheet which was so All major assemblies were then final Upon opening the box, the first thing I heavy it was discarded for a lighter piece. sanded and all dings filled with Model noticed was how well everything was BUILDING packed. There was no damage to any parts Following the suggested steps will allow during shipment. The top of the box was you to quickly assemble your model. filled with rolled plans and a three-page in­ As I planned to power my airplane with struction sheet. Also included was a scale an O.S. .20 four-stroke engine, I began to documentation sheet, AMA application look for any changes that might be neces­ and a catalog of other products available sary. The only one I found was to move the from Davey Systems Corp. The instruction firewall back 1/4 inch. Everything else was sheet is very complete to help those who done exactly as the plans indicated, except may be new to modeling. It lists everything for making an extra rib where the two outer needed to build, finish and fly the model. sections join. This made the sections easier Although the printed building instruc­ to build and attach later. tions are minimal, one look at the plans and The wing is built in four sections and then you will understand. The instructions and joined together using the dihedral jigs sup­ isometric drawings contained there make plied. They are very helpful and take all the any further explanation unnecessary. Fast guesswork out of that step. N o fiberglass is building time of the model shows a well- needed at any of the joints. The front lead­ thought-out construction procedure. All ing edge sheet is glued on in one piece, die-cutting was excellent and once all the connecting all of the assembly and produc­

λ « -

44 MODEL BUILDER

the dealer brought out a stepstool and proceeded to remove the model from the ALL ABOUT ceiling, at w hich point I said I would prefer him to trot out one packed in the box for me. He gave me a peculiar look and said, "Sorry guv, they don't come boxed. The gent what builds them delivers them ready to fly just like you see it." H e went on to ex­ plain that this ARF was built by a one-man ARFS operation, and was supplied completely as­ By ART STEINBERG sembled. Even the wing was in one piece, so that pretty well precluded any ideas I has • To me, an A RF is a model airplane which usually given some current British and of bringing one back to the States on an requires little or no building to get it into other European model magazines). After airliner with me. the air. I think most of us w ill more or less visiting a number of shops, I noticed that agree with this definition. However, we many of them were displaying the identical tend to think of ARFs as com ing from large ARF hanging from the ceiling, a really at­ “Just because it factories, done up in all kinds of fancy tractive cross between a large trainer and an doesn’t come in a boxes with handsome multi-colored pic­ old timer. The model was beautifully made, tures pasted all over the top and sides. This with a wingspan of close to seventy inches. factory carton is no used to be essentially my idea of an ARF, The covering material appeared to be one reason to think an until one day on an overseas trip I arrived at of the new types of heat-shrinkable fabrics, a rude awakening. and it was expertly applied. A conventional airplane does not My wife and I were spending a month tricycle gear was mounted, and all that was motoring around England in a rented Rover, necessary was the installation of an engine qualify as an ARF. and whenever we cam e to a model shop, I and radio. I was highly impressed by the im­ Throughout this made a point of stopping and having a chat maculate workmanship, and the price was with the owner. We were very cordially extremely reasonable, especially when the country there are received, especially as I had w isely decided dealer offered to knock off the fifteen per­ scores of accom­ to carry with me a number of American cent tax for an overseas customer. After model magazines to distribute to my new­ making my decision to purchase the model plished builders who found friends (in exchange for which I was and arriving at an agreement on the price, provide R/C airplanes for other fliers.”

But all this brought me to the conclusion that just because it doesn't com e in a factory carton is no reason to think an airplane does not qualify as an ARF, and that is the point of this narrative. Whether it comes from a high-volume production line or is laboriously hand-built one at a time, an A R F is still an ARF. And that leads us to the topic of this month's column, the "custom built" ARF. Throughout this country there are scores of accomplished model builders who provide R/C airplanes for other fliers. After all, whether a friend or a stranger or a large cor­ poration builds a model for you, you have acquired an ARF, an almost-ready-to-fly, or a com pletely ready-to-fly m odel. H ow much you pay for it or where you get it makes no difference. The work is done for you and you end up with a finished prod­ uct. Accordingly, let us take a closer look at a few of the custom ARF builders around

Charlie with Webra .90 powered Martin Baker MB-5. Model was Miss Arpiem old timer shows that Charlie is a versatile builder. Model given the usual single test flight and put up for sale. flew very well and quickly found a ready buyer.

46 MODEL BUILDER Two photos showing part of the production and storage facilities of Models in Motion, based in Tampa, Florida, and run by Walt Popaden Jr. Models in Motion turns out a number of excellent performing ready-to-fly airplanes, both gas and electric pwered. and investigate what they have to offer. fits fine works of art, and w hile I know they in our hobby. Som e guys can't build or just Beginning on the west coast, in Southern are splendid flying machines, I derive all like to fly. I see no reason for anyone not be­ California, where flying is a year 'round ac­ the pleasure I need just from looking at ing able to enjoy any aspect of the hobby. tivity and the R/C sport requires an unend­ them. For those connoisseurs who want I've assembled some commercial ARFs my­ ing supply of models, we have a builder by only the very best and are not seeking to self and I like the EZ line. the name of Charlie Strange, Captain, Den­ purchase a particular model, Charlie "You mentioned in your column that a tal Corps, USN (Retired). A very prolific Strange can be contacted at 3215 Donna pre-fab ducted fan would be of interest. I builder, Charlie averaged about one plane Drive, Carlsbad, California 92008, tele­ supply Violett Vipers in various stages, from per week until his recent retirement from phone (619)729-1823. a pre-fab kit to a com pletely finished and the service. With additional time on his Conducting his custom A RF operation in painted model, ready to install radio. I think hands, there is no telling how much he w ill an entirely different manner is Gary Walker, we w ill see a surge of interest in ducted fan be able to increase his production. Not of Cocoa, Florida. To quote Gary: models. only is he a fast builder, he is quite gifted in "I enjoy reading your column. ARFs and his ability to turn out jewels of model con­ custom built-to-order models have a place Continued on page 65 struction. H e doesn't advertise, but his out­ put is almost com pletely consumed by friends and those who happen to hear about him. Some of his models are also sold in local hobby shops, and his prices are well within reason. Charlie builds models for the love of the hobby, and he seeks only enough remuneration to reim­ burse his costs and help out with his model­ ing expenses. While he does fly his own personal airplanes now and then, his real interest is in building, and he is happiest when toiling at his workbench. The manner in which Charlie builds models is more of an art form than a craft or a hobby, and this approach manifests itself in the fact that he virtually never builds the same airplane twice. Also his artistic lean­ ings do not permit him to build to someone else's desires. H e w ill rarely accept an order Clean and trim, this taildragger looks like a real snappy performer. It's just one of several for a specific model, and if you wish to pur­ high-performance R T F ships available from Models in Motion. chase one of his creations, you just have to ask him what he has in stock at the mo­ ment. In a manner similar to buying whole­ sale diamonds from DeBeers, you have to take what he has or forget it. H e does seem to lean toward old timers, but he also turns out a great number of scale models, varying from quarter-scale giants to full-bore ducted fan military jets. Some models are painted, some are doped. He uses every brand of plastic heat shrink film, plus silk, dacron, or a combination of any of the fore­ going. He sometimes sells a model com­ plete with engine and radio, sometimes with engine only, sometimes without en­ gine or radio. As when dealing with a well- known artist, you buy what he has to offer. I have purchased a number of Charlie's models and some of them are so beautiful they kind of bring tears to my eyes. They re­ One of the R T F electrics from Models in Motion is the "O hm -Bre," designed by Ernie King. pose in a place of honor in my home as be­ Workmanship looks to be first-rate. Plans are also available; see text for info.

MAY 1989 47 "There's only one way to do it right, but an infinite number of ways to do it wrong!" — Walt Mooney

REFLECTION TIME "Observations: Favorite designer, A.A. • These ramblings are being composed in Lidberg and his profile scale models. For a Charming Leina Osada of Japan upstages the late 1988, even though you will be reading beginner these are the best planes to build, Brown Jr. CO 2 powered Howard DGA-9 built them during early 1989. Certainly '88 fly and learn from. My favorite was the by Ian McQueen. passed rapidly here at the Hangar. . .our Beechcraft Staggerwing, which I eventually with, all the suppliers I bought from. . . personal model production was down, gave away to someone who wanted it more And you know what? Those who believe however our mail correspondence was up, than I did. Free Flight is dying are not aware of what's way up, confirming that our audience had "Best Peanut ship: Hah! Until you learn to going on out there. an exceptional year of model building. We build light, I'd suggest bigger planes and "Matter of factly, I think Free Flight will thank all of you for your continuing sup­ profiles. . .it wasn't until about my tenth grow. Consider the facts: the Flying Aces port, encouraging words, holiday greeting Peanut that I actually got one to fly farther clubs are growing and they have made fly­ cards and marvelous photographs. than the ground. Peck-Polymers has the ing scale models fun; there is a trend in so­ Our gratitude is also extended to Edi- best kits, but my best outdoor flyer is from ciety to return to traditional values, there is tor/Publisher Bill Northrop and the entire Gene Dubois, whose 'Big X' has averaged a recurring fascination with the airplane; crew of Model Builder, for renewing our over a minute every time I let her go. the antique airplane. After all, people flock Hangar lease for another year! "Best plane over 24 inches is from to the EAA, they fill the parking lots at air- A YEAR IN REVIEW Golden Age, a Rearwin Speedster with shows; our love affair with the airplane is far Stuart Van Dorn, of Buffalo Grove, Il­ which I actually won two Flying Aces Club from over. It is, in fact, just beginning. linois, winds up 1988 by sharing his mass launches. "W h a t is needed is for all of us to realize thoughts with us: "Best buys: A Wilder winder. . .and a that we are diplomats. To see that each of us "After a year of flying rubber scale, etc. rubber stripper by Oppegard. These are has the job of representing what is best in (I've) seen some interesting sights, learned very much worth the price and I suggest our segment of the hobby. To tell others and some interesting things and wondered out every beginner buy one now! show others how to build, fly, and most of loud if maybe, just maybe, modeling isn't "Best clubs: The Calumet Aeromodelers, all, enjoy watching something we've sometimes the sport of the seriously IMAC and of course, the Chicago Aer­ created fly. demented. onauts. The combined brain trust of these "We all build models for different rea­ "But that's just based on observation and three is enough to scare any beginner. Not sons, but the Free Flighter builds with two action. I guess I was an active builder this to mention the teasing you get when one of goals in mind: aesthetics and performance. year: sixteen No-Cals, twelve Peanuts, four your roughly-trimmed planes flies like a M y goal is to learn to build models that per­ two-footers, one Jumbo, two Embryos, one drunken bumblebee. form as w ell as they look. After a year I have P-30, one C O 2, bunches of Phantom "But hey! This is a big thanks for all the learned that I am on the right road with the Flashes and others. . . help. A thanks to all the modelers I talked right friends. This has been the best part for

Peter Koutney holds as Ivan Simolik winds his fine-flying Zlin 2-50M Oklahoma's Stan Denton built this Pistachio-scale "Found" from during Czechoslovakian contest. Photo by Tonda Alfery. shrunken Walt Mooney Peanut plans. Photo by Larry Kruse.

48 MODEL BUILDER Above: One of nine (!) "Island Flyers" built by Clive Wienker, of Friday Harbor, Washington. Three of them have gone OOS. Right: Karlo Eisele of Germany unearthed this historic photo of famed aircraft designer Alexander Lippisch flying a rubber-powered stick model circa the 1930s. Note the forward fin and the wire hoop to protect the prop. lingboro, N ew Jersey, "You have to know what failed before so you won't do it again!" AND SPEAKING OF HISTORY Ed Whitten favored us with an article about famed industrial designer Raymond Loewy. From it we learned that Loewy had designed a rubber-powered model airplane during 1908, patented it, and registered its trademark "Ayrel". Further, it was a huge sales success, firmly establishing Loewy in the design and manufacturing business. And, oh yes, he was only fifteen years old at the tim e... SOUTH AMERICAN SAFARI Roald Tweet, of Rock Island, Illinois, re­ Fine action shot by Bob Jones shows Lindsey Smith launching his Peanut Martin SC-1 float- cently toured Brazil, Ecuador, Peru, Bolivia, plane in the hangar at R A F Upavon, England. Paraguay and Argentina, with a group of me." our mention of Henry Farman having students: FLYPAPER coined the term "aileron" reminded him "Among other things, I spent my spare Wink Peck's journal of Folded Paper that the late great Art Scholl used to carry a time looking for evidences of modeling in Flight newsletter, Volume I Number 4, ar­ little dog with him in his aerobatic Super those countries. Until Argentina, I found al­ rived recently, and features, among other Chipmunk. The dog's name was "Aileron", most none: no hobby stores, few kits in any tidbits, a dual-rotor paper autogyro. Model and upon Art's command, he would stores aside from American and Japanese autogyros are seldom seen, even in po­ promptly perform an aileron-roll. plastic kits, and not many of those. Cer­ wered form, but this one is even more As an aside, Gerald says that his own pet tainly no indigenous model industry. remarkable since it is a hand-launched is named BoBo, and that he w ill occasion­ 'Then we visited Buenos Aires, where glider! Designed by James Zongker, the ally BooBoo... modeling is alive and well: many hobby model is claim ed capable of flying up to 35 THE VALUE OF HISTORY: stores with the latest R/C equipment, no­ feet, and is constructed entirely of paper, According to George Townson, of Wil- tices of contests, school programs for even the rotor axles. model building, etc. I even found M od el Flyp ap er also offers reviews of publica­ B u ild e r for sale at many kiosks or street tions devoted to the art of paper airplanes, newsstands all over town. It cost 89 Aus- as well as miscellaneous commentary rales there— the equivalent of about $5.50 (even some mentions about Model Builder U.S. dollars. magazine). A 4-issue subscription is availa­ "Argentina, too, was the only place I ble for $10 ($12 foreign) from: FLYPAPER, found native model kits produced. What is Box 47186, W ichita, Kansas'67201. interesting is that the designs ought to be STICK AND TISSUE COMICS? very familiar to readers of Model Builder— Model builders have always been an they are cousins if not twins of our models. imaginative group, and Jim Longstreth, of (At least one was an exact copy. . .w.c.h.) Portland, Oregon is proving that tradition in You might call them the 'Pecks of the a big way! Issue Number 45 of AIRBOY, pampas'. published by Eclipse Comics, incorporates "A small shop in Ecuador was run by an three of Jim's stick-and-tissue flying models old man w ho made kits and toys. O n e of the into an adventure story. O n e of them, a things he did was to take cheap plastic toy Bostonian, appears on the comic book's planes (imported) and cover them with cop­ front cover, piloted by the hero of the story. per. I've never seen anything quite like it. Also featured in the bizarre adventure are "Our group visited a number of small In­ Dr. Kate M ulligan and her alter ego, w ho is dian villages in Peru and Ecuador, in several to ornithopters what mermaids are to fish. If of which I had native children flying paper you are "into" model metaphysics, pick up models. The children became amazingly a copy of this comic book at your local Electric powered 1933 Lippisch "Storch" IXb good at it, given that they had never seen a tailless, by Dan Walton, contrasts with his Pea­ dealer. paper plane before." nut Cessna Airmaster. The full-size Storch was WHAT'S IN A NAME? a successful machine, but Dan says his is quite Gerald Martin, of Hereford, Texas, said a way from being fully flight trimmed. Continued on page 63

MAY 1989 49 MAY THREE-VIEW—CROWN AGENT COUPE, By Peter Carter This is a rubber model that looks like a rubber model should look— it has a built- up, tissue-covered fuselage, wing, and stabilizer, just as we should expect from a British free flighter. This design has been featured in a couple of newsletters recently but in an odd scale. This version is present­ ed in 1:5 scale for ease of enlargement. The rib patterns and the propeller pattern are presented full size for the same reason. Although the plans don't indicate flight • No more soapboxes about the weird rule directions, a studied look at them shows change proposals! No long tirades about that the fin is airfoiled so that a right turn is the Nats Indoor site! N o political speeches built in. The 3 degrees of right thrust also in­ about this and that! I promise that this issue dicates climb direction. Build both of these of Model Builder Free Flight will feature features into your model and plan to have it only useful items so you can concentrate on fly right power and right glide. enjoying the hobby of your choice. So, let's To me this looks like an easily built model get on with it. that should fly right off the board. If you are APRIL MYSTERY MODEL thinking about a Coupe that would be a World-class F1A flier Lee Hines with the ship O.K., Bill Darkow. You keep telling me to starter model for you, this might be it. he flew at the Sierra Cup meet, Taft, CA. present a Mystery Model that you don't MAY DARNED GOOD AIRFOIL— bulators are made from monofilament or know. Get something hard to identify, you C A R D 7 % dacron fishing line about 1/64 inch in dia­ say. Here it is! If you get this one, then I've John Gard has been a serious rubber- meter. They are glued to the w ing surface af­ failed again. I can't let it go at that, though. powered model flier for many years, but in ter covering and doping. Placement of the Here are a few hints. This model was de­ addition, he has conducted many experi­ fore and aft turbulators should be at approx­ signed by a free flighter who was well ments with these designs and published his imately 5 to 7% and 14 to 15% behind the known, and is still well known, for his rub­ results w idely in the free flight press. This leading edge respectively. ber powered ships. As you can see, this example of a Gard airfoil is intended for use John Gard's airfoils have been success­ Myster Model is an ornithopter, and it was on a Wakefield model or other rubber- fully used by many competition Wakefield featured in a national publication in 1947. powered model of similar size and charac­ fliers and should be considered strongly for Like many ornithopter designs of the per­ teristics. It should be useful on smaller such use. iod, it looks like all of the others. The trick Coupe designs and on any of the smaller WALLY SIMMERS ON THE GOLLYWOCK here is to come up with the exact name of unlimited rubber models. Typically, Gard's AND PETE SOTICH RESURFACES this design. If you can do it, then fire your airfoils use a turbulator or two on the front The January issue of Model Builder fea­ entry off to Bill Northrop at Model Builder. upper surface. If this section piques your tured the real Gollywock design by Wally As usual, the first correct answer wins a free curiosity, then I would suggest that you ex­ Simmers. After it was published, an old one-year subscription. periment as well with tabulators. The tur- friend, Charlie Sotich, sent a copy of the

Randy Archer gives his F1C model a mighty heave in flyoff for 2nd First place winner in F1C was Doug Galbreath, seen here at the mo- place at the Sierra Cup. Flyoff action ended with Roger Simpson ment of launch. Randy Archer (right) gets ready for another flight, (in background, holding model) winning 2nd, putting Randy 3rd. All Sierra Cup photos this month were taken by Bruce Augustus.

50 MODEL BUILDER WING RIBS CUT FROM 1.5mm BALSA SHEET

1.5x1.5 1.5x3 T H R E A D 1.5x1.5 O TURBULATOR b~ CO o z cc CL CO z o WING AIRFOIL - B-7406 CO Z UJ 5 1 .3 ° K CO UJ LO T 3 7 .8 ° in CO

3 7 .2 ° h i UJ < 3 6.2° Q E E 3 3 .5 ° -

< 3 2 .5 ° - Z Έ WEIGHTS O z FUSELAGE. . . . . 29 GRAM S 3 0 .6° z m PROP ...... 16 cc 03 TAIL ...... ____ 4 WING ...... 27 2 8 .4° MISC ...... ____ 3 < Q. 79 G R A M S UJ o < -J m CL O CC CL

2 1 .4 ° fZ FLAT CENTER SECTION, 102mm DIHEDRAL----- EACH- TIP - --N i T rt T— — —1 ■305- -254-

POWER 6 S T R A N D S 6mm x 1mm CROWN FILATI. 360 TURNS GIVES 45 S EC O N D RUN AGENT F1G COUPE D'HIVER, by PETER CARTER 3 ° R IG H T NOTE: ALL DIMENSIONS ARE IN MILLIMETERS 54 THRUST

MAY 1989 51

OBSCURE AIRCRAFT Blackburn Firebrand torpedo bomber, 1934 inattention, I let model building slip on by. This month, we present a photo of the Kreider/Reisner (Fairchild) XC-31, Macchi This year when I saw Empire of the Sun my Russian Lavochkin LA5-FN/LA-7 fighter C202 Folgore from W W II, and the Ryan FR1 interest in aenomodelling was rekindled by from W W II, as built by David Diels. While Fireball piston/jet com bo fighter. this movie. The plot was poor and ex­ it has not been modeled before by others, it W e know that once you see the great vari­ tremely convoluted, but the cinematogra­ is an excellent flying model with great pro­ ety that David Diels offers, you w ill be as phy and the models were excellent. M y fa­ portions for a Peanut or FAC scale. turned on as we were. Fie is a dedicated, vorite scene in the movie was when the DAVID DIELS KITS & PLANS thorough designer of high-quality kits and Mustang buzzed the prison camp. Mus­ From out of Ohio come some of the best plans. As a cottage industrialist, he deserves tangs have always been a favorite and after Obscure Aircraft flying scale kits and de­ your support. Send for that new catalog seeing them in the film I ran out and bought tailed plans that any dyed-in-the-wool aero- (fully illustrated with profiles of the designs) a Comet P-51 kit and built it. As you can m odeller could desire. W e w ill try to list today, or better yet, put a check in the mail guess, some of the skills and tricks were a some of the most obscure (little known or for a kit to build this weekend. Be sure to bit rusty, but slowly and surely I found them seldom, if ever, modeled) but you w ill cer­ tell him that Insiders/Model Builder sent all coming back to me. tainly want to send $1 and an SASE for the you. Enjoy your next stick 'n' tissue flier "Since my rediscovery of our wonderful full catalog and order form to: Diels En­ from Diels. W e are building one for the next hobby, I have been reading your column re­ gineering, Box 101, Woodville, Ohio MIAMA meet at MacDill AFB, Tampa, ligiously each month. It's nice to know that 43469. Overseas readers should send ap­ Florida. there are some fellow gum-band nuts out propriate International Reply Coupons with the self-addressed envelope. O ver the years, by networking with other dedicated scale fliers, David Diels has built up an astonishing collection of plans. He now offers kits as well, based on the more popular designs. O u r favorite is the 4-in-1 Peanut kit, where in one box you get plans, 1/20 inch printwood and strip, molded canopies, tissue, prop, bushings, rubber and complete decal sheet. This box w ill get you into a building orgy like nothing else! Imagine having a quartet of Peanuts to fly at your next Insider session! In the following kit list, the first price is for kit, then postage in USA 1st Class. In the 4- in-1 kit ($26/$2) you will find the Brewster F2A2 Buffalo, Vultee P66 Vanguard, French Bloch MB-152, and the Japanese Mitsubishi J2M3 Raiden (Jack). W h at a great com bo for an FAC W W II mass launch event! O ther kits include the 15 inch span F4-B2/P12-C in 1/24 scale ($10.50/$1.50), the aforementioned Lavochkin LA-5FN ($12/$1.50), the fat Navy Grum m an F8R2 Bearcat ($12.50/$1.50), the famous Chinese Insiders Workshop photo from Chicago shows that Ted Kowalczyk is busy building a Dornier "Flying Tiger" Peanut P-40 Warhawk/Tiger- "Phiel" (top), an Allied Sport (right), and Heinkel 100 (left). shark ($10.50/$1.50), the Curtiss A8/A12 INSIDERS WORKSHOP there. Your 'Insiders' column has been a Shrike ($17.00/$2.00), and the famous Cur­ Ted Kowalczyk of Chicago send us a great great source for supplies, plans and build­ tiss SBC-4 Helldiver from the late 30's photo of his workshop, with several scale ing inspiration! Between you and Doc Mar­ ($13.00/$1.50). A vailable soon are the models under construction. Readers would tin, I have found sources for all those goo­ Douglas TBD-1 Devastator and the Super­ like to see your workshop, so send us a dies and supplies that I could not get my marine Sparrow II Peanut. photo and a brief description of what is go­ hands on when I was younger. If you are a dedicated scratch builder, you ing on in the shop, like this one from Ted: "I "As you have requested I am sending a will enjoy these highly detailed plans for recently returned to the wonderful world of photo of my workbench. I converted an old obscure Aircraft Peanuts ($2.00/75*) that aeromodelling after a seven-year absence. kitchen table in our basement into a work really fly: Northrop N23 Pioneer trimotor, College and Law School conspired to take Fairey Spearfish W W II torpedo bomber, up much of my time and through my own Continued on page 62

MAY 1989 57 pert (you'll know that's happened when about half the fliers don't want to fly against you and the other half can't wait to get at you). M y observation has been that the typical flier moves through several "plateaus," BY JOHN THOMPSON periods in which he doesn't seem to make much progress, followed by seeming leaps • A workshop is a very personal matter. during one of the hobby's most popular and in ability. One such leap is the ability to Most modelers spend much time getting exciting activities: combat. avoid or to fly out of line tangles. Another is them set up just so, for efficiency and com­ This is the next in a series of "how to get the point at which you stop crashing. An­ fort while producing their beloved air­ started" discussions. We've already dis­ other is w hen you develop the ability to see planes. It starts with a basic layout, and cussed racing and precision aerobatics. what's happening in a match and begin to gradually, over time, things are added Combat is the event in which the flying take control of it, rather than just hang on to (modelers never throw anything away). draws the most attention of spectators, par­ the handle and hope to get lucky. Another Then, just when the shop is the picture of ticularly those who are not familiar with is the point at w hich you improve your abil­ efficiency (or a monument to uncontrolled model competition. It has a fairly recogniz­ ity to avoid collisions. Another is when you clutter), comes the dreaded moving day. able objective and it is fast and furiously acquire the ability to keep your concentra­ This is w hen you really find out just how exciting. tion properly focused from the beginning to much you have accumulated over the years It's an event that looks difficult to the the end of a match... no easy chore with you've worked in that particular shop. casual flier but, like all other competitive things happening so fast. Another is when Guess what your C/L colum nist has just activities, the difficulty is overcome by prac­ you actually begin to be able to aim your been going through! I am happy to relate tice. As opposed to some of the more plane at a moving target (streamer), and to that everything that made the "traveling demanding go-fast events, such as rat race, make small adjustments necessary to hit it. squad" (sad to say, some old items didn't combat is something that can be done by As you make plans for your combat make the cut) arrived safely in the new resi­ virtually any person of average intelligence career, you might want to think now about dence (about two blocks from the previous and skill. True, there are outstanding ta­ where you want to end up. Most fliers in the one; oh, so near, but yet, so far!). Unpacking lents, but for even those fliers, the true road United States eventually move to fast com ­ is another matter. At the time this is written to success is paved with practice. Though it bat, the purest, simplest and most exciting in December, the designated workshop is an event of speed and horsepower, it is area of the garage is nothing more than a not absolutely necessary to have the fastest tall heap of. . .w ell. . .stuff. M y goal is to equipment to w in. Here, flying is the most get it sorted out and set up by the time you important commodity. And in combat, un­ read this. like in some of the other events, any flier On the bright side, a move is an opportu­ can beat any other flier on a given day. W ith nity to make modifications in the layout of a little luck and practice, the winner's circle your shop that suits you as a builder. Some is open to almost anyone. careful planning, based on the good and However, getting started can be a mystify­ bad points of the shop you just left, should ing puzzle to the new recruit. There are a result in an even better shop. In my case, I've half-dozen different combat classes, vary­ had to think out some new ways to store ing rules, etc. W h ere to start? 1/2A? A M A ? things. . .and a lot of shelves are in my fu­ FAI? Slow? FoxDoo? Biplane? Super Slow? ture. I don't plan to move again soon, so I The answer is that it's possible to start in want to get it right this time! "all of the above." However, as always, a As mentioned in a previous column on planned approach is most successful and workshops, I invite pictures of workshops enjoyable. I recommend selecting one class and tips about how to set up and use them (I'll help with that in a moment) and devel­ that might help others, particularly newer oping basic combat skills before moving fliers, get theirs into shape. Now, on to the on. My prediction would be that if you do real topic of this month's discussion. . . so, you will eventually feel like branching CUTS & KILLS out into several combat categories, and No, we're not talking about what hap­ then will gradually drop out of some of pens when your knife blade slips or you them and focus on one or two favorites. squash a bug on the workshop floor. Along the way, you will progress slowly in Typical modern foam AMA Combat planes. We're talking about what happens in the your flying skill until you become a veteran Dave Childs holds his own (left) and our col­ grass circles at C/L meets across the country and maybe even build a reputation as an ex­ umnist's "U nderdog."

A good example of a typical Slow Combat ship. Fliers just getting You can expect to bust a few models at any combat meet. Here Tom into this event should pick a simple design with very few pieces. Strom gets packed for the Northwestern Regionals.

58 MODEL BUILDER makes it forever interesting not matter how long you've done it. * * * First, let's talk about the basics. W h a t is combat? There are two planes, each towing a crepe paper streamer, separated from the plane by a length of string. The object is to cut or remove that streamer. Points are scored for cuts and for time in the air. In some classes, cutting the string constitutes a "kill" and ends the match. Here is a brief description of the most com m on combat events. After that, we'll talk about some possible routes into com­ bat activity: Fox Combat Special, THE engine for Fast and A M A Com bat— In the rulebook, it's just Slow Combat events. M ike Hazel photo. "combat," the event that all the others ment and suction fuel feed. Same lines as evolved from. It's com m only referred to as A M A combat. Scoring is the same as A M A "fast combat." Airplanes are unlimited in combat except that there is no kill. Speeds design. Engines are unlimited except that range from 75 to about 100 mph. Cost of they must be no larger than .36 displace­ airplanes is about $20, engines are in the ment. The event is flown on 60-foot .018 same price range as AM A combat. Four or Gary Byerley (left) and our columnist mix it inch braided steel lines. Matches last a five airplanes needed. up at a Bladder Grabber, with Mt. Rainier in maximum of 5 minutes from a cold start, 1/2A com bat—This event is identical to the background. Photo by Charlie Johnson. scoring 1 point per second of air time and AMA combat except that the engine size of combat events—the Indy car equivalent. 100 points per cut. Kills end the match, maximum is .051 and lines are .012x35 feet. However, in other countries, or for those with the w in going to the killer. Average air­ Speeds are 50-60 mph, but the reaction with international aspirations, the goal may planes travel about 100 to 120 mph. Aver­ time is about the same as fast combat due to be FAI combat, a considerably more com ­ age foam-winged airplanes cost (scratch the shorter lines. Engines cost about $24, plicated event but the one in which the built) about $10 each, more for kits or all­ planes about $5. Two or three planes are world championships are decided. balsa planes. N ew engines cost $80 and up, enough for most contests. You also should go into the event with but the $80 Fox Com bat Special is competi­ FAI com bat—Airplanes are basically un­ some sense of how long it will take to ac­ tive without further expense. Airplanes are limited; engines are .15 size with some re­ quire proficiency. With intensive effort and generally quite simple to build, requiring 4- strictions on design. Lines are 52 feet long. a lot of flying and competing, most fliers 5 hours each. Five or six spares are needed Matches last four minutes from a running can become fairly proficient in a year or per contest. start, with one point scored per second of two. However, most of the best fliers are still air time and one point deducted per second studying and learning about the event after of down time. There is no kill. Unlike all of 10, 20 or more years. “Combat is the event the above, two airplanes are allowed per I've observed an interesting phenomenon in which the flying match. Speeds are in the 100-mph range, about new fliers: A new flier often finds but the planes seem quicker due to the great success in his first year or two, possi­ draws the most at­ shorter lines. Cost of airplanes is roughly bly even winning some contests. Then, he tention. . .it is fast the same as AMA combat; expect to pay will hit a long period, perhaps another year $175 and up per engine. Ten or 12 planes or two, of frustration before beginning to re­ and furiously excit­ needed for any major contest. sume his w inning ways. I attribute this to an FoxDoo combat—This is an unofficial elevated "luck factor" in matches involving ing. This is the next event run in many places by local rules, but new fliers—their rough edges cause un­ in a series of ‘how to it is mentioned here because of its growing predictable situations in matches that can popularity and appeal to beginners. In most result in some wild and crazy wins. As they get started’ discus­ places (rules may vary by location), the re­ begin to fly better, their experience makes sions.” quired equipment is a Goldberg VooDoo the matches become more conventional, airplane or accurate reproduction and a the luck factordiminishes, and the more ex­ Slow combat—Airplanes must be profiles stock Fox .35 stunt engine. Rules are other­ perienced opponents take the wins away. with 24-inch fuselages, 300 square inches wise the same as A M A combat. Speeds are Then the real serious apprenticeship be­ of wing, canopy, horizontal stabilizer, ele­ around 80 mph. Airplanes cost around $20, gins. Does this sound like a challenge? You vator and vertical fin (see rulebook for de­ bet. Com bat is a challenge, and that's what tails). Engines are limited to .36 displace- C o n tin u e d o n page 76

A 1/2A Combat plane built and "decorated" by (are you ready for Mike Keville took this shot of Chris Gay, of the So. Cal. Combat this?), "Sir Charles Matheny III, Undisputed King of 1/2A Combat." Team, launching at a recent meet at Whittier Narrows.

MAY 1989 59 the trailing edges tangent with the back of the ladders, the wings will have the correct stagger as well. All that is left is making certain the wings are at right angles to the fuselage. I accom­ plished this by placing the fuselage on my rigging board on a center line, then I drew right-angle lines at the exact location that the trailing edges of the lower wings should go. I glued small blocks on these lines, tall enough so when the lower wings are plugged into the fuselage with the correct By FERNANDO RAMOS dihedral angle, the wings are still up against the blocks. With the lower wings in the proper place and on the ladders, the other two wings follow suit. This same setup will • I am still trying to figure out w hy I chose aluminum tubing is a bit critical because be used for correctly rigging the model dur­ to build a Sopwith Triplane for the F.A.C. the braided control line wire I'm using can­ ing its completion. Nats, considering how I dislike building not be pushed through if the radius is too As I think about it, this setup should also wings. However, while building this model, small. Naturally, you want to try this before work quite nicely for biplanes. The key, of I incorporated a few ideas that worked out permanently mounting the tube in the course, is being able to place the fuselage quite satisfactory, so I would like to share fuselage. The idea here is obvious but it these with you. does allow the cables to move when the el­ To start with, I norm ally attach the land­ evator is adjusted for trim. ing gear permanently to the fuselage, but The rudder was done the same way ex­ on this model I made it removable. The gear cept the aluminum tube did not require as fits into grooves under the fuselage and is small a radius as the elevator. Incidentally, if held in place with small straps and screws. you want to use silk thread instead of con­ I did this for two reasons: First, I planned to trol line cable, place some ZAP or other make the gear scale with the split axle typi­ CA glue on one end of the thread and let it cal of Sopwith aircraft, so that the wheels dry. This w ill make it rigid enough to allow are provided with a nice flexing action. Se­ you to push it through the tube. Only the condly, without the gear mounted and absolute tip of the tubing should be tangent screwed in place, the fuselage can lay flat to the covering, otherwise it w ill look pretty on the board for squaring the wings and tail crummy. As soon as the model is covered, for rigging. poke a hole where these openings are Another consideration is that with a while you can still see them. After painting model this size (weight over a pound), the these openings cannot be seen clearly, and gear needs to be fairly stout. On smaller what you don't want are a bunch of small models with the gear permanently in­ holes in your finished product. Wonder stalled, I let the trailing part of the gear flex how I learned that one?! inward into the fuselage. This works out just O ne of the most interesting aspects of this fine in smaller or lighter models but not so model was aligning all three wings. This in­ in this particular case. At any rate, I like be­ volves several points. O n e is the correct in­ ing able to remove the gear if it becomes cidence angle of all three wings. Another is necessary. the correct and equal dihedral for all three I ran into an interesting problem when it wings, plus having them at right angles to came time to rig the control cables of the the fuselage. This is no mean task, however, rudder and elevator. Since both of these sur­ with a couple of simple devices, it didn't faces were going to be movable, the cables turn out too badly. had to be attached in such a way that they Take a look at figure 2. The first item I could be moved also. I took two pieces of made was two identical ladder-like struc­ 1/16-inch I.D. aluminum tubing, bent them tures. Notice that they incorporate two of as shown in figure 1, and mounted one on the three points just mentioned. They pro­ either side of the fuselage where the eleva­ vide the correct incidence angle and the tor cables go. Interestingly, the radius of the correct amount of dihedral. Also, by having

F IG U R E 1

THIS ARRANGEMENT P R O V ID E S F O R T H E INSTALLATION O F S C A L E C O N T R O L CABLES, YET TO COVERING ALLOWS THE SURFACES TO BE ADJUSTED FOR FLIGHT TRIMMING

The diesel-powered Sopwith Triplane that gave our columnist fits until he devised a fixture for accurately aligning the wings.

60 MODEL BUILDER RADIO CONTROL HANDBOOKS These books contain e w y th in f the R/C mod t ZENITH «ter needs to know about his respective top c r . Iro n selecting the mode» or equipment through mstaSabon and construction to fin rttwne and flying Each book f t 64 pgs BOOKS «pro» 80 Λ U3600AP Setting Up Radn Control H dkep terv by Dm Day...... $9.95 1I3599AP InstaAng Radio ConUol Eou»- v w . . . : ment. by Peter Smootfry...... $9 95 KMR b 113601AP BuikMig From Plans, by David Boddington...... $995 \n/C MODELING ADVANCED GUIDE TO RADIO CONTROL SPORT FLYING BASICS OF RADIO CONTROL Pratt Scratch b u tte s and M buttere. th * booh BOAT MOOELING e a m iet tor yoir workbench! Complete ttate-cf Fnch Theeditorsof f e t e ControlBaatUoUHtf BUILDING & EL YING the art techniques tor planning, bwidinf. and teach you ertrythmg about geiteig started Cov­ en gas and electric power, construcbon. radio ttyvig your plane Superb bps and tnde lor con- RUBBER POWERED MODEL vtn jctm plus information on Amencan Mcde gear, propellers. modAcetens. tetong up your AIRCRAFT ARCHIVES A must for modelers *nd enthusiasts1 Detoxed m AIRPLANES The Bask Handbook itrs Associate» insurance. chartering a dub. and workshop, what to do at the take, and race® me runmnjl acontest 1 60 o g s.86 u boat Indudes dubs 71 pgs.. 130 A formation on each aircraft, pfee cutaways, three DeieungIBwdingIrlying 1131488 ...... $9.95 v*w d’ *»mgs. cockpc dupa-rrs. weapons, spec Ross From beginner to expet Bus book a a . $9.95 ■ficaticns. and performance data 96 pgs. 52 comprehemree goide to rubber poweed BEG IN N ER'S GUIDE TO DESIGNING l BUILDING COMPOSITE photos. 96 drawings modeling Toots, m aterials seteebon con RADIO CONTROL SPORT aYlN G R/C MODEL AIRCRAFT NEW BOOKS 113008AE Postwar k ts . Voi. I -xu d es A-7E ' · fcnsfeng foght k Lamb* Compete rude showing how to bu tt Pratt A mutt W anyor*thm k»g of gettine start MOOR CAR BUILDING. Crusader F-4 Phantom, F-105 Thurvderch«et. deign are aI l coveredco Wte3 * e •d nth e nobby Comptreefy details EVERYTHING strong. vgtW gM 4 beautiful models Foam, LOCKHEED BLACKBIRDS Sea Hamer, and 18 mere ...... $16.95 ______ith dear concise ______balsa fiberglass kevtar. polyester 4 epows Advanced Techniques the novice needs to know about budding from Doty Thts book of arf< *x*d modebag lech ThornOorcugh 4 Davies Tho rs the story of 113009AE Fighters of W W II. Vol. 2 . Covers P discussion of the tundamentoh oi r ubber 112492A P...... $16.9 5 51 Mustang. S?>tt>re. Messerscftm.rt Bf 109. d fyng traner mqges shows you how to customer modfy the Blackbirds the SR 71 ttebu. the U 2 144 PCS 80 K a le R/C DUCTEO FANS: How To Budd 4 Fly and detail your models lo make them show Dragon Lady tta* 18 1 and ER-2 Ml cwenDy Focke Wulf FW190. and 10 more1. . $16.95 ______J ______0 Λ ). Your Own Je t Successfully quality or (ust more personal Indudes Hot Oywg throughout the world lns*de yo u 'l fiad U3493AE Postwar lets, tfoi 3 includes 113330AP...... $12.95 and hebcopters 144 pgs. 8 0 1* Fane* An expert shows you (he secrets of buld· Knrte parts swapping engine wring chop­ tost hand accounts bom Blackbwd prints that Skvroy. De Hamkand Vptowe and Swallow AEROOYNAMICS OF 1 1 2 9 8 9 A ...... $9.95 i ducted tan Construction, fm etav ping channeling, sectioning, creating con portray these daring spyptanes at work. Ulus MiG I I and 21 Saab 129 Tupolev Tv 104 hated *nth many unpaW .hcd photographs and l im o-e $16 95 MODEL AIRCRAFT FUGHT SELECTING R/C SYSTEMS & out crash*® vertibles adding molded features decafs Sawn It you're buitong or to-ntow of Ui'tovy and mere. Also includes an ewrsflent source scale drawn** and color photos. Tha tsthe 113492AE Bombers of WWU Inctodes B 17G COMPONENTS FOR YOUR S most itveafing book yet published on USAF row own pane you must read the No math, rv pnde 178 pgs 150 4 Fortress Dauntless Lancaster Mk I 6 III B AIRPLANE. BOAT & BUGGY ...... $12.9 5 «comsatssanee planes 144 pgs 2504 24J Liberator Ilyushin Stormovik and 16 formulas, last a dear wndmtaoding of what 113483 A ...... $9.95 makes the plane Senave and nvsbehme so you Pratt 6 Texas Include a brie! fwtoryot each plan# FIGHTER JETS: MS- SfttXt s k i level raph*.»nek>reerv contests, *aefois.------etc tare e xt toe Coast Guard's war on dnw vm *- and the CAF 61 pgs. 122 pheta. 90 « cckjr Ready-to-8uild-and-Fly Model Aircraft 107501A ...... $24.95 112491A P ...... $12.95 107617 A ...... $24.9 5 gte* 96 p p . 125 coto photos 113195AE...... $11.95 Boy* G’ u t frying cut outs ot F 4 Phantom, F -86 1 12771A P...... $19.9 5 BELL X-l VARIANTS. 0ATAGRAPH NO. 3 Satoe. MG-21. and others that are e * y to as 400 GREAT R/C MODELING TIPS DOUGLAS DC-3 SURVIVORS. VOL 2 IIA rr The first evtr detailed look at the hetcry semtite and v»a g-ea! ixhid es complete specs Newman Tremendous number of fane 4 money SUPER8ASE SERIES to rc y . Skytw n. Skytrooper. Dakota, and Goo- and hardware ol Chock Yeafer s reconHaeatahi on the actual awcart and tveenew iw n g s saving o® on Dwtd«g. tooa controls, fk^it Pen ExphwM new books probing the tomoir> lighter jet weapons schools m the Unfoed Dey Bird lo w s the n toe defmftnt caiitog W supenomc « e a rth pi»ne Packed with over 200 Uadtof dinbtecardrtockL 72 pgs 4 more 76 pgs sttbd Im ta cm ib n g new Sopertme senes profile» the events action end dry today operations mg the rwghfy DC 3s that are sWI aroimd le ts photos and dkatrations teatum* every compo 1 12 92 3A ...... $10.9 5 1119798 ...... $9.95 ot oof top mibtofy ftgM instruction schools Over 100 hot acbon coto p i* * » capture the e w y p ro * butt « Santa Monca. Long Beach, nert 4 the plane, pke cockprt. enpne. awfram*. men and machmes These books otter the fo sterer M ko fo r c o m » shown* what ft and Oklahoma Cey - whether ft's thing m a mu specdotons. the ranares. and more A must tor takes to become the Pest tighter pilots wi the wortd Eacft a 1 2 8 ^ 1 2 0 color photos seom. or rotting w a httd Packed mth photos modeien and R an S n/f bofH 64 p g s,2 30 A STRIKING BACK VIDEOS aec heston on etch 256 pgs 240 1 An absolutely mcrtdOe. oneof-a food show A 113017AE...... $12.95 pamstuingiy detailed re-enactment of the battle 113 22 4A E...... $26.9 5 OBSERVER'S AIRCRAFT 1988 « the South PacAc by rado control planes and F i l l VIDEO PROFILE McOONNELl-DOUGLAS F/A-18. Back ig m for another year* Every page a packed sht® We're taking g-ant scale, authentc acton1 Zoom m dose tor great mtormabon and F M INIGRAPH NO. 25 wrta pftotov. thrwview dravHng! and Oetawed « 30 minutes, color 111 acbon Irits you about the planes capa torrtatw onpertcrm w w andosrqirjcteo You 113002AVHS ...... $14-95 tubbes phis a re enactment of the Uwan r»d Cat1 tenemabo. cutaways. cockpit photos, da annot paa up the handy "tubfo·'to the world of grams, des-gn inbrm etiea. weapons .· wrfoten 255 pgs. 142 phet®. 314 O m m FLYING R/C MODELS U3312CVHS ...... $19.95 m *rk.ne, and mere First rtarm t bocktf tot «_____ h id e 1129B 6A E ...... $9.95 Learn how to select a tro«er. use 4 care of R/C 113313C Beta...... $1995 F/A I K . D. and D* No other book ohen the WARRIORS: The United State Marines equipment, take o«s 4 ta n d w . smooth flyme much detailed mbmation tor u id i a tarn r o t Von Havset Take the toughest otyw m pyie you maneuvers, recovery from dftticuft srtuabons 4 R/C VIDEO MAGAZINL VOL 10 112962A E ...... $7.95 •ifn e u the m akxa of a Mann* AnmcerkWe more 1 hour. The fotest« the dynanta senes Incto W ARBIRDS WORLDWIDE. NO.4 eight years in t v matong as Van Has»e« takes 109981E VMS...... $39.95 ed ta® m acbon. dtt*sng by master Dart Piatt, The West issue m this n o td tte series showcas­ you from dr« fwkfe to sftjmmg μ η |> ι and icy 109982E Beta ...... $39.9 5 ing Vintage w w n a u critt Seet»rteci»irestored mount**! to® captjnog the rie«*d amt raw U * _____ Association, and 1987 Scale Masters Oiamptorste® 90 mwutes. cofor phnes. plus wartrne feature articles th is ssue fine Corp framing A l m hgtirng tu« cater. 200 THUNDERSfRDS THEN AND NOW 112990AE 1: N dfe: Home ot -Red FIm " ...... $ 1 4 .9 5 feature Mosque and Uiam- 112996C VHS ...... $37 .0 0 . .$ 1 4 .9 5 An incredtoe video history of the legendary T- I I 2991AE 2; Miramar: Home ol “Top Gun" 112769AE...... $9.95 U3085C. . $38 .0 0 &rtb and the planes they w re flown Great ac 112997C B eta ...... $37 .0 0 U3324AE 3: Rim slem : Headquarters ot the USAFE . $ 14 .9 5 WINGS OF THUNDER 113323AE 4: Deer NATO s European Combat Range . $ 14 .9 5 Amanng footage and mcredtte stuns trom the 113611AE 5 Mddenhall: Mufti mission Task Fo fce. $14 95 8toe Angels. Snowbirds, and the Kalian. French, 113609AE 6: Cherry Point: ta n Do' and H *ri* It . $14.9 5 Fehbng Falcon, l houv" and BranUn yet teams Daredm) Cunts at in­ 1130738J7 3EV H S ...... $32.95 credible speeds' ASS* 113074E Beta ...... $3295 113000A VHS ...... $14.9 5

u.i. PillSimvVaYJSaft S c a ■ M M

VIETNAM CHOPPERS MIRPLMNES tk/istan 200 combat photos 4 «depth text on scouts, skeks. p/sships. heavy transports 4 air AMERICAN COMBAT AIRCRAFT AND U S NAVY CAG AIRCRAFT COLORS S U.S. NAVY AIR WINGS: Flamboyant ambulances in acbon Rates strengths weak HaiCOPTERS OF THE VIETNAM WAR MARKINGS. VO L 10 Markings 1965-1975 nesses 4 development m aerial combat plus POSTER BOOK GIANT s c a n IPART1. FIGHTERS) FranaHon 4 lew is U S Wavy A .r Wtrus is a Uitoto from crews 200 p p . 330 4 Over 100 photos and illustrations detail the plane and choppers that touch! the tattle In Keruy 4 Leader Over 250 photos and n fo rn positve not ot cefor featuring Skyhawts Cra 112 59 3A E...... $22.95 INTRODUCTION TO ELECTRIC FUGHT GIANT STEPS: M m a c to n (total fh t planes and markings sabers Vigilantes Phantoms and Skymghts FLYING MODEL HELICOPTERS: From vade»s. Phantoms. Prowler*. Broncos, and more t o a d : team the « a n d outs of dean v h r · «action and up dose IncKjOesmartaresandcof A Book of Giant R/C Aircraft of the 'Commander ot the Air Group- planes wearing some of the most flamboyant a u o ift Basics to Competition power Detom afl aspects r t efoctoc R/C fkght Includes F 8 Crusader F A Phantom and F or schemes 9 b p p . 1 5 0 4 .7 5 « csio r 1/4 scale models! M s. plans, pro®, frying sfuto. markings eve Vivid color photographs and O n Become a brttw plot with detaM mstruc 15 Tomcat 6 4 pgs 2 1 0 4 1132320 ...... $19.95 construction tip s, radio p a r 4 a l you want to Ngh quality printing bring these imaginative tions on training, advanced frying, aerobatic, 112 64 3A E...... $19 .9 5 know about buying, bufoteig 4 V * 9 G p lw s 113065A ...... $14 .9 5 b?ds home to you 128 pg s. 123 cofor 4 APACHE: competition fry«ig 4 more 192 pp THE COMPLOE MANUAL OF 1075888 ...... $ 1 2 9 5 WARBIRDS WORLOWIOE SPECIAL I13326AE ...... $14.95 110761 A E ...... $21.9 5 Multipurpose Attack Helicopter SPITFIRE AT WAR: 2 An explosive fu lco fe r look i f the newest ELECTRIC VIP'S DIRECTORY EDITION Mustangs Worldwide SCHLITTER'S R/C HELICOPTER MANUAL PROPULSION SYSTEMS: A spectacular issue devoted to the P 51 10 Price Leading Sprtlire expert ABred Pnoe. f t Of GIANT SCALE PUNS tales hr*t hand accounts of important bathes Sehluter ThebfWeenT, Complete specs, history anefover 100 color The Ousel Rnolutiqn deVnes 4 Pv ·-® Complete » and events in the Spitfires legendary past Bases of Hefrcopfer. ______Tectuioiqey. R oJToi fW i Dy photos show you the rotorcraft dedvated to Boucher Packed «nth mfo on Mead M tte re specs t.v 50 p r* . a r t pans tncfodei netonc a . FkgM Training. Pertormance CalcutaCaicula M Mustang b and presents eiportant historical documents t day or tatt charges, motor speed rformebon en the t t s n rrre fl and a *«tory c l to reveal the ruture ol combat m th e . one of tens 4 burling techmques 125 color photos t heicopwv etc 70 pgs the p in Sopwtth Pup- NYP. Curt.ss P 40 Twin Mustang and P 51s m service Superb 107 49 2A E...... $21.95 Mustang anecdotes and mfonnabon pius the most lamous of rarktary aircraft Backing iS S f f $19 95 F9- Sew s!.andm eny mare I16p g s.50< t outsttnong photos! 1 0 0 4 the text a rt more than 170 photographs of 107638A ...... $ 1 2 9 5 1129070 ...... $11.95 112918AE ...... S 9.95 the Sptfee m action many ol wtoch have never been pxtokshed before 160 pgs AMERICAN WARBIRDS 113229C...... $28.95 Order Toll Free Peakns A superb ootectmn of new color phetos SHOOTING STARS: Lockheed’s featuring U S hgfrter planes from WWH The Legendary T-Bird CARS 1-800-826-6600 mast Kurmoc and metcutoush restored planes O Uary ThtT-33of " Τ ·8 « Γ 'β the worlds most ORDERS ONLY VYI. Canada & all inquiries use 1-715-294-3345. «side and out and n rare aerial action F4UCor- famous and most-used tehter-jet trainer The sair. P 51 Mietang. T 6 Texan. P4 0 Warfuw». ID DAY MONEY BACA GUARANTEE LIBRARY OROCRS 4 DEALER INQUIRIES INVITED pfone debuted m 1948 and e sbe bud and used < * $ £ * < * Wildcat. H elical, and mom 128 pgs. 122 color tedey Burts and modelers w ii go crary over 122 Items can be charged ta Mastercard. Visa. American Express Optima SHIPPING 4 HAN DUNG CHARGES are $395 The fee charged covers cost of shfopmy 4th class book post or phot® thundenng color phot® showing the planes m 113014AE...... $14.95 UPS We w« ship the best way NO CODs Resfoents ot CA. H I. I L KS. MA N t NM. NV, TJL 4 fight and upciose m the service of the USAF and Wl please add your state’s sales t a Prices 4 wadabAty subject to change GATE GUARDS US Nav, See now i v TOP GUN s siartetf 128 Chmnery There are few air bases outPde the p p . 122 c o b photos ΖΕΝΠΉ Also available ai fine hobby stores. iron Curtan that eo not haw a Gate Guard poised 112 83 6A E...... $14.9 5 at the entrance They are the retired plane that B-52 Ageing Buffs. Youthful Crews Β BOOKS P.O .B o x II MB059 OSCEOLA. WISCONSIN 54020 do not go to the graveyard, but are placed at FranoBon 4 le w s Over 100 superb cofor phot» ^ Sand Nam numdvn Κ ( Χ Ι ( M im t "! spectacuiar angles and preserved to* eternity defcvtr a h fh hying, fudeofor profile of the nvgt» J ) RADIO CONTROL Over 100 increSbSe coior photos capture a hugt ties! bomber to « « r fly the unfriendly skies See CAR MODELING variety of Igtrters and bombers trom around the the {tin e dose-up. in acton, and « the cockpit, Street Get the warning to re 1 The baby it packed BASICS OF R /C CARS country A must for hetonans and modeler* 144 pfos Its latest w e * ·* - t v Cruse Mssile Throw with great t,® and secrets to tu to r* « d r a a v L l techniques 4 hardy bps you need to get start pgs. 130 cofor pnotes away any ideas of Stealth, the 8-52 a pure mus­ youe cart Indwto modrfcatxxK wirrw tires ed Coven tu to r* a car. suspenvam patomg. ate UttXwaim* IrulMliWCX Will. IS WX « WU « 1 1 iW lf lu u M iw il Π 3 2 3 8 Α Ρ ...... $17.9 5 cle power and payfoad. and these photos capture w d lm g . gear*, electron*», racmg tfrateg) modHcatens. hattenes 4 chargers, rode gear Cncloawe ra m» cirech or m o n tj order lor t S a il 128pp . 120cotoi photo phsretmg. a v irjc h more 0 « r 100 A rt® *>S» drwng. compet-tion car care. ma«tef4nce 4 SU PER BLUE Chargetomy DM C DVISA DAMEX DOrtima This spectacular book wilt take you to new 112 99 3A E...... $14.9 5 you how 54 p p . H I 4 much mere hearts - 30.0CW feefl Anmcredtie cobecton d LIGHTNING STRIKES: The 475th Fighter 1128898 ...... $9.99 1109928 ...... $9.95 a«t ·______tap____ tui-cotof photos M the cockpts ot F-J4 Tom Group In the Pacific War 1943-1945 M*NU»10FEUCTRICR/CCAII$ BUGGY RACING HANDBOOK Cxrdbofoer i S«njiurt------cats. F-15 Eagles. V rage 2000s. and Saab Vg Yoshiv One ol the very best personal accounts Loaded With mfo OO Choosrfig a car B iA in th iw Coren competAioo. to e . suspen- teaaww ______gem take you to where the air s dear and blue ot WWU m the Paohc Nearly z00 rare. <**Sme * pambnt batfenes. geenng. von «wfobfo bugpet moton. speed control which tew ever sec See the planes n «widest ol photos and rnetmg ted take you «to the heart ol kuspensen. setting up for a ’ a c t. to t prep 4 ten. radogear 4 rote* lists manutacturen 4 *»·« ______blue yonders and dos^ups on the ground, pks a the jungles and the v a t d the battle Great shots mucn more detnbuten O r ______S i * ·______i e ____ look at aerobaic teams rndudmg the BtoeAnges of Ρ -3 ». nose art. and combat acton 1 6 3 p p . U O e a iA E ...... S14.95 1MMWC...... 113.95 and Thunderbeds 152 pp 184 photos 1 1 3 0 8 4 C ...... $30.0 0 113247E...... $2295 Prices subject to change without notice Vrea Our or< « a warenouto or 779 Prospect * ·* Oscooio V which turned out easier than I imagined. The first step was to make a wood plug that would be turned down to the correct shape QUARTER-SCALE CAP 10B and diameter. I made the plug out of four pieces of pine glued together. W h en dry, I cut a circle about 1/8-inch undersize of the actual diameter required. This was cut out using a bandsaw. I blew off the sawdust and coated the disc with a thick layer of Bondo. (This is a body putty used primarily for body work on cars.) The front of the disc was also coated. When the Bondo dried, I turned the disc on a lathe. The Bondo cuts beautifully on a lathe! The cowl was cor­ rectly shaped and measured while still on the lathe. W h e n finished, I had a very smooth mold. I acquired some plaster of Paris and a cardboard paint bucket. I mixed a sufficient amount of plaster and poured it into the paint bucket. The cowl mold had been The C A P 10B is the only C A P that showed absolutely no tendencies to stall previously greased with silicone and was a wing on landing no matter how slow it flew. It is extremely docile to land but then pushed, face down, into the bucket of is capab le of full aerobatics including Lomcevaks. It is a pleasure to fly." plaster. A weight was required to keep the plug from floating to the surface. I let this Wing area: 980 sq. in. Kit includes fiberglass dry for 24 hours. (Incidentally, I cut down Wingspan: fuselage with formers in­ $260.00 75 in. the top of the bucket making it no deeper Length: 62 in. stalled. fiberglass rudder and Coming Soon' than was required). Expected Weight: 13-16 lbs. wheel pants, balsa-sheeted I wish I could say that all I had to do was Dates Wing Load: 35 oz/sq. ft. foam core wings and stab, Fl6 1288 reach in and remove the cowl mold. Well, it precut landing gear blocks, M Phantom Other kits now available and vacuum-formed canopy. was almost that easy. It wouldn't com e out (Single engine) t89 SR-71 108 Length easily, and as I didn't want to damage the fe­ t-4 Corby Starlet 75 Wing F 18 Hornet A4Skyhawk 40 Scafewing male mold, I drilled a quarter-inch hole in (Winner Of 88 45 Sport wing the bottom of the bucket near the center of Scale Masters) AIRCRAFT & HOBBY SUPPLIES L m the plug, all the way through the plaster. If you drill a little into the plug, no harm. YELLOW Next, I took an air hose and blew air into the hole. In a few seconds the wooden plug popped out, leaving a super female mold behind. S10HANDUHG/SHIPP1HGCOO The plaster mold was still damp so I gave it more time to dry, then it was rubbed with plenty of silicone grease. Strips of fiberglass 11918 98th Ave. E ., P u y a llu p , Suite 201,3040 Palstan Rd., Mississauga, cloth were placed in the mold and satu­ WA 98373 (206)845-8195 Ont. C a n a d a L4Y 226 (415) 273-6757 rated with epoxy. I used two layers. W h en this dried, I removed the cowl from the mold with airas before. I had a few pinholes on a large flat surface on a center line with rims. Now what? Finally, I hit on the idea of that I filled with Bondo. The cowl was right-angle lines locating the lower wings. gluing the Solartex onto the rims using Su­ trimmed, sanded and primed. The results There are instances where the trailing edge per Seam glue, which is used for attaching were well worth the effort and, actually, it of the lower wing drops below the lower fabric onto full-size aircraft. wasn't all that bad. longerons of the fuselage. I use a large sheet I began by cutting out four discs of Solar­ I hope these hints help you. If you think (3x4 feet) of plywood for rigging, so it tex using a compass fitted with a sharp this is too much work, just remember that would be an easy task to cut out a small sec­ blade. I made a small hole in the center of anything worthwhile takes effort and work. tion near the fuselage wing root using a each one so it could pass over the wheel's To me, there is a lot of self-satisfaction in sabre saw. Since most lower wings have di­ hub. Glue was liberally and carefully ap­ testing one's ideas! · hedral, the cutout section only needs to be plied (you don't want any on the tires). Then near the fuselage. the disc was applied. I let this dry for quite Insiders...... Continued from page 57 With the Sopwith Triplane it was neces­ awhile before I tried usjng heat to shrink the sary to pre-rig the model com pletely before fabric. Even though the glue had properly area. I understand that a workbench should covering, because there are flying wires that dried, I applied heat with care. The results be clean and uncluttered, but we do not actually intersect the middle of the center were very satisfying. Around the hub the live in a perfect world. This is how a real wing. Also, there are a pair on each side fabric shrunk enough to expose the spokes workbench looks!!! It looks as if a bomb hit which cut through the leading edge as well. underneath. I purposely left in a few w rin­ it, but that is the way I like it. I am sure that Even though this was extra work, it proved kles, as most photos of W W I aircraft show you are interested in what is being dis­ to be worthwhile when the model was the wheel covers anything but smooth. I played in the picture, so let me describe rigged for the last time. was pleased with the overall effect. them to you. I used Fulton Hungerford's fantastic wire Initially, I wanted to make the version of "Starting from the top and going clock­ wheels on this model. I tried to find a photo the Sopwith that had an unpainted alumi­ wise: this is a Dornier 'Phiel' built from of a Sopwith Triplane without the wheel num cowl and panelings. There is a com­ Dave Diel's plans. I have purchased his P-40 covers, but that was not to be. The only pany out here that makes reasonably priced and 4-in-1 Peanut kits and am quite pleased thing I could do was cover these beauties. cowls but he did not have the exact size I with the quality of the wood and the plans. The first idea was to try and vacuum form needed. The cost to have one custom made I also ordered a number of his plans and the covers, but the results were not all that was more than I cared to pay. So, I used the they are of top notch quality as well. W h at I great. I then tried Solartex but found the version with painted cowl and panels. especially like about his plan assortment is adhesive would not adhere to the metal I had to make my cowl out of fiberglass the variety of the planes modeled; there are

62 MODEL BUILDER ELECTRIC o m m ~ & m

Buzz the skies in search of the RED BARON with DSC's neat little stand-way-off scale model of the famous WW1 fighter.

Do take-offs, aerobatics and touch and goes with this 40" span, 275 sq ." a r e a beauty on 6 or 7 cells.

Simple and quick to build with the precut % fuselage sides and tail feathers. The combo includes the DSC HYPERTHRUST 075 motor, fused switch harness with tamiya connector, pro­ peller adaptor and propeller and the kit!

| ) a vey 675 TOWER LANE 30 amperes meter to determine current S y s t e m s WESTCHESTER PA 19390 draw of any motor/propeller combination. | J CORPORATION 215-430-8645

more than just a few that make you stop and ago I built a Flyline Heinkel 100D; this credibly expensive B-2 (acknowledged to say Huh?. model was the first one that was caught up cost at least $500 million per copy) has a 'To say the least, this was a challenging in the gentle hands of 'Hung.' It was during Navaho-blanket look about its trailing edge, model. Quite frankly I am afraid to cover a contest and as you can imagine, it was not w hile the fighter, identified as the F-117A this beast and fly it. The complexities of its an official flight!! I like this version, but I (whatever became of the F-19 designation?) push-pull features really worry me. So far, would prefer to build a Peanut of the 100D looks quite Medieval in configuration. The building airplanes has not been the prob­ with the normal wingspan. M aybe if I get estimated cost of these are from $85 million lem, I just don't seem to have any great luck really ambitious one day I'll draw up my to $100 m illion each. W h ic h lends cre­ in flying them. In his plans, Dave men­ own set of plans." dence to a theory advanced by aerospace tioned that with a simple mechanical INDOOR WEEK/USIC 1989 engineer Norman R. Augustine, in his book device you can prevent the second motor The world's largest Indoor model Air­ Augustine's Laws, in which he concludes from starting until the first motor was down plane Competition will be happening dur­ that the unit cost of aircraft have been stead­ about 30-40%. I have tried to envision such ing June. This "Indoor W eek " (5 days of fly­ ily increasing by a factor of four every 10 a mechanism but I cannot for the life of me ing) is being sponsored by NFFS. It w ill be years throughout aviation history. By ex­ come up with one. Maybe you or one of held at the Mini-Dome, East Tennessee trapolating from existing statistics, Au­ your readers have a suggestion. I am open State University, Johnson City, Tennessee. gustine anticipates that by the year 2054, to anything. Build your models and enter this spectacle one military aircraft w ill cost approximately 'The second model is an Allied Sport, so you can be an active participant and also 1 trillion dollars! As he puts it: ".. .the en­ built from a Golden Age Reproductions enjoy associating with the indoor flying tire defense budget will purchase just one plan. The structure is simple and straight­ greats! tactical aircraft. This aircraft will have to be forward. I made very few alterations to the The United States Indoor Champion­ shared by the A ir Force and Navy three and basic plan. Most notably I laminated the ships, which will include the F1D contest, a half days per week except for leap year, wing and tail feather outlines. I am a big fan will run from June 1 through June 4. Think when it will be made available to the Ma­ of lamination. True, it is a little extra work, of it! Twenty-seven events! This will be like rines for the extra day." but I think the results are well worth it. The indoor heaven! The MIAMA Peanut Grand O u r thanks to Bill Baker for alerting us to structure is stronger, lighter and much more Prix will also be flown. For full entry info Augustine's Laws, not that we find them very beautiful. Anyway, back to the model. She send a large SASE to Tony Italiano, 1655 Re­ reassuring... has a 20 inch wingspan and she looks like vere Dr., Brookfield, W isconsin 53005. · AT THE OPPOSITE END OF THE PRICE she w ill be a honey of a flier. The wings are SCALE nice and big, the fuselage is just right and Vince Leah, of Manitoba, Canada, enjoys Hannan...... Continued from page 49 she has a decent set of tail feathers. Some low-cost modeling: day I plan on building a Pistachio version of THOSE STEALTH AIRCRAFT “Model Builder is by far the best model this plane. Ed Whitten, Mark Fineman and Florence magazine for us fellows w ho build stick- 'T h e last model is a 13 inch Heinkel 100 Bakken favored us with newspaper and and-tissue types. I have been building from an old issue of Crosswinds. It is the magazine clippings related to the so-called model airplanes since 1930, when my inter­ clipped-wing version of the plane. The con­ "Stealth" fighter and bomber, which were est in model flying was the stepping-stone struction is relatively straightforward. Years recently unveiled (well, sort of). The in­ to a career in new spapering .. . I am 75 to-

M AY 1989 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 63 no tendency to load up. Darn nice perform­ ance. This means we now have a small, powerful Cox engine that will allow a model to sit still on the runway and idle slow enough to work like an airbrake for shooting touch-and-go's. As the instructions say, the engine was happiest running at CARBON FI high rpm on small props. It was not easy No matter how much time and effort running on the 7x4 and 6x4. It happily you spend building a model, its screams out a muffled bunch of power with lifespan will probably be shorter than you the 6x3. All props you run on this engine should hoped for. Many of today's Almost Ready be very carefully balanced. .. best to sim­ to Cover, Almost Ready to Fly, Ready to Fly, ply shorten the tip of the heavy blade. My and eventhetraditional Readyto build kits test engine seems to have a vibration mode are not as strong as they could be. around 17,000. The needle valve tended to back out so a 3/4-inch long piece of Dave Brown Products' Carbon Fibre Tape is medium fuel line was used to replace the made to solve this problem. It is among the needle valve's spring, and that minor prob­ strongest materials known to man. By lem was easily solved. It sim ply is not possi­ epoxying the tape in those crucial areas ble to stop a single cylinder engine from vibrating. (such as on foam wings, around cut­ TECHNICAL SPECS outs in wings, and along fuselage Crankshaft diameter is .250 inch at the sides), it can lengthen the life Apply it to front and rear surfaces. There's minor anti­ any model. the top and drag relief down to .245 inch between the two bearing surfaces. The piston and con­ bottom of wings Try our Carbon Fibre necting rod assembly weighs a scant four for increased Tape. You will be glad grams! The top of the piston, in Cox prac­ you did. strength. tice, is copper plated to promote uniform heat across the piston. The cylinder head is machined from aluminum and will accept DAVE BROWN PRODUCTS any 1/4-32 glow plug. The head seals to the cylinder with a single .006-inch copper 4560 Layhigh Rd., Hamilton, Ohio 45013 · Ph: (513) 738-1576 gasket. The cylinder looks scaled-up from a TD .049 sleeve. . .twin exhausts and twin bypass flutes. Most Cox engines have sub­ piston induction, that is, with the piston at the past year, after 20 years away, during T D C the bottom of the piston skirt uncovers “High-Amp” Powerpole which I went to college and started a family a minor bit of the exhaust ports for addi­ Modular “Silver Plated" Connector and career, and more or less got all those tional combustion air to enter—great for Rated 30 Amps at 600 V D C Electrical Resistance 250 Mcrohms things I had to do out of the way. And so high speed, but it inhibits pumping at idle Color Co-ordinated (Red & Back Loan Housing) now the priorities have shifted once more speeds. The Q ueen Bee has no sub-piston and have rearranged themselves. I find my­ induction and idles beautifully. The dis­ self once again living in the basement tance from the top of the piston up to the amongst my slivers of balsa and scraps of head's squish band measures .029 inch at paper. And loving it. TDC and the cylinder head has a single Only certitied checks or money orders accepted Minimum order 'T here are two large differences that I no­ bubble .325 inch in diameter surrounded S12 OO for three packages of 4 Poworpolcs (S3 50 per package * $1 50 shipping and handling) CT residents add 7 5% sales ta* tice in my perception of the hobby before, by the .070-inch w id e squish band that is Prices subiect to change without notice DEALER INQUIRIES INVITED. For further nformatwn and and the hobby now: First, I seem to know not angled. The bottom of the Fox short dealer prices send SASE and Business Card to how to do things much more easily and plug fits well down into the combustion SERMOS R/C readily now, than I did when I was in my cham ber instead of being flush with its roof. early teens. There is much less frustration in The exhaust timing measures 153 degrees. SNAP CONNECTORS building things, and that pays off directly in Top I.D. of the cylinder is .463 and the bot­ Cedai Comas Station Box 16787. Stamford CT 06905 (2031322-6294 self-satisfaction. And second, there is some tom is .465 (slightly tapered as is so money to be spent on the hobby, which not modern). only allows me to do things that are new, I suspect the hop-up experts w ill have lots day and I guess some people think I'm but also gives me second chances on things of fun with this new engine— and that some ready for the men in the white coats, but I that I mess up on with my first attempt. of their tricks will eventually find their way love flying things. In the past few years I've "I wouldn't say that either of these are of into factory production. There's room to ex­ been researching and designing kites with earth-shaking moment, but reinforce some periment with the exhaust manifold and the an airplane configuration. I have been basic philosophy that all things have their passageway between the manifold and the building little fellows in the Peanut and time and place. And the wonderful thing is beautifully turned muffler. The engine Pistachio range. The ones with only five- that there are many more things to do, and should respond well to running on a muf­ inch wingspread, made from cigarette much, much more to learn." fled tuned pipe. Some may experiment papers, fly bravely on 20-foot long cotton SIGN-OFF TIME with balancing by removing metal from the thread fastened to a 6-foot dowel. If your model building projects never disc of the crankshaft on both sides of the "... I also have a dozen or so electric- seem to reach completion, you might care crank pin. powered Peanuts flying round-the-pole. to consider the Robinson Crusoe system: This is the very first production of an en­ W h en the rest of the local modelers shut Have all your work done by Friday! · tirely new Cox engine. It's a great piece of down for the winter, I fly Peanuts indoors in made-in-America model machinery which the cellar. N o mess, no pollution, just an in­ w ill cost you about $40.00. If you com ­ Inside Engines Continued from page 21 spiring hum of the motors." pletely w ipe one out in a crash a total THEN AND NOW from the engine for several minutes while it rebuild w ill only cost you $21. plus $4. for Reader Mark Sheffield reports: idled, returned and slammed the throttle postage and handling. I see tremendous "I have just returned to the hobby during arm forward. Acceleration was good with growth in smaller R/C enthusiasm, a fine

64 MODEL BUILDER engine for a new breed of ready-to-fly models and a resurgence of small hand- launched R/C pylon racers and a new generation of designs and kits for the Sun­ day sport flyer to enjoy. The engine is a honey! I'm so enthused I'm building an K&S For Tubing original design three-channel open cockpit model with a shoulder wing and trike gear and I'm calling it—you guessed it— Honey Bee"! PERFORMANCE COMMENTS Full throttle on a 6x3 prop yields four or more minutes running per ounce; a two- ounce tank is sufficient for sport flying. I r t * Δ had lots of easy hot restarts. The rear of your Λ ί*Τ © · Φ .· props will need to be drilled out with a #3 drill bit. The muffler makes the engine Our carefully engineered line of metal products has unlimited uses in the de­ plenty sociable. General performance velopment of all types of projects. All of matches a Cox T D .049 at high speed, ex­ your metal needs available in one place. cept the Queen Bee is much quieter and throttles beautifully. The engine will run STOCK PRICE STOCK PRICE STOCK PRICE backwards just as happily as forwards. The NO. SIZE EACH NO. SIZE EACH NO. SIZE EACH single needle valve controls both high and 1QQ 1/16 .25 262 3/32 x 3/16 1 20 250 90 101 264 idle speeds so adjustment becomes a trade­ 3/32 30 1/8 x 1/4 1 30 251 OIO B rass 1.25 1 0 2 1/8 30 266 5/32 x 5/16 1.50 252 1.75 off between the two rpm extremes. A slight­ 103 5/32 35 268 3/ 16 x 3/8 1.75 253 3 0 0 104 3/16 40 2 5 4 0 0 8 Tin ,75 ly rich safer setting yielded lower figures—a 103 7/32 45 BRASS STRIPS (12") 255 0 1 6 Alum .80 slightly leaner setting yielded somewhat _ !Q6 1 / 4 50 230 0 1 6 x 1 /4 25 256 0 3 2 Alum 1 00 I -107 ____9/32____ 55 231 .016 x 1 /2 .35 257 0 64 Alum 1,50 higher figures. The test engine was "un­ 232 0 1 6 x 1 50 258 1 50 1 ROUND BRASS TUBf (1 2 ) comfortable" and strained on the 7x4 test 233 .016 x 3/4 .40 259 .025 CoDDer Z 7 5 I 125 1/16 35 234 0 1 6 x 2 90 126 3/32 35 prop; it wasn't at its best with the 6x4 either. 235 ■ 025x1/ 4 _ .a a _ BRASS ANGLE (12*') 1 2 1 1 /8 35 _ 236 .Q25._x._!./2- .40 As the directions state, the Q ueen Bee is — L?.6 5/32 40 237 __ Q25 .& i___ _7Q_ ..129 3/16 45 238. happiest at highest rpm and I'd advise using 130 7/32 50 _QZ£_s._a/4 _55_ - 2 3 9 - , . lQ2 5 x 2 . 1,3Q 1.31 1 / 4 60 o n ly the 6x3 prop size. . .240 .032 X 1 7-4 .35 13? 9/32 65 Performance with Cox #551 fuel and Cox 241 032 x 1 /2 .50 133 5/16 70 242 0 3 2 x 1 .85 props: 1 3 4 1 1 /32 80 135 3/8 90 ____ IZfl______l Q - Prop High Idle 136 13/32 1 OO 245 60 182.. ____5/32____ .9 0 - Size Speed Speed 137 7/16 1 1 0 246 !9.3. __3-/J.6 63 138 15/32 1 20 247 184 ____7732____ 70 6x3 16,200 . . slightly rich . .4250 _ 139 1 /2 1 30 248 064 x 1 1 70 ’W 1 / 4 75 1ΊΟ 17/32 1.40 249 0 64 x 2 3.00 6x3 17,500 .. slightly lean .4750 141 9/16 1.50 SOLI D BRASS ROD 1 2 ) 1 4 ? 19/32 6x4 13,400 .. slightly rich .. 3500 (erratic) 1 60 SQUARE BRASS TUBE (12 ) 159 0 2 0 10 1*3 5/8 1 70 <49 1/16 Sauare 65 160 1/32 12 6x4 14,300.. slightly lean . 4000 (erratic) 1 4 4 ___ 21/32___ 1 80 _ 1.5.Q 3/32 Sauare 70 161 3/64 15 With fuel containing only 10% oil (half cas­ COPPER TUBE M2") _ 151 1 /8 S au are 80 162 1 16 2 0 tor, half Klotz), and 10% nitro (a four-stroke 117 1/16 25 152 90 163 3/32 25 1 18 3/32 30 153 3/16 Square 1 1 0 164 1 /8 40 fuel mix) and after 1-1/2 hours running: 119 ____5/32 _ 154 1 20 165 5/32 60 'go <78 _25_ 155 1 /4 Sauare 1,40 166 3/16 80 6x3 16,700 .. slightly rich .. 3600 167 1 14 40 SOFT BRASS FUEL TUBING 112 ) BRASS STREAMLINE TUBE (12Ί 168 081 40 6x3 18,000.. slightly lean .4250 ’g' I ’ ^8 I 50 122 Small __ 9Q_ <69 ____ lQ Z 2 ______

The last set of high/low rpm figures yields a Send 25 cents for catalog and price list. K&S Engineering, 4.64:1 speed range at the safe, slightly rich 6917 W. 59th St., Chicago, Illinois 60638. setting w hich is truly astounding for such a Telephone: 312/ 586-8503. small engine turning such a light prop. I didn't think the Cox accessory engine mount is quite stiff enough (it's being im­ proved) and there are minor dimensional errors quoted in the instructions. I cannot find fault in the .074 Cox Q ueen Bee engine itself. It's great! ·

a joined wing with glassed center section. Custom Building Service, 2200 West King A R F S ...... Continued from page 4 7 Stage III is completely built and covered Street, Cocoa, Florida 32926, telephone "I'm working with another builder and in Super MonoKote. (407)637-5116 during working hours or we can only produce one or two models a Stage IV is completely built and covered, (407)632-3164 evenings. month and have a waiting list. I also try to with engine and radio installed. The builders discussed heretofore are stock a few ready-to-cover airframes (sport As all work is done on a truly custom ba­ probably most typical of the great number stuff.)" sis, certain additional services are available. of modelers w h o build for others. Some are G ary is an example of a true custom For example, models can be supplied faster than others, some are more skilled builder, as he w ill undertake to build just primed ready to be finish painted. Gary will than others, and some charge far more than about any airplane you wish, including also build individual components (wings, others. But in the main, they are talented trainers, old timers, sport/aerobatic, pat­ fuselages, etc.) to order or as replacement craftsmen who love to construct models tern, pylon, sport/scale, and ducted fan parts for customers' models if they are and take great pride in their work. They are models. H e w ill supply these in any of four damaged. so taken up with the hobby that they just stages as follows: As far as the cost of such services, it is ob­ happen to turn out more models than they Stage I consists of a completely built vious that there is such a w ide spread from need for their personal use, and so they fuselage, w ing panels, stab and fin, kit plans one model to another that prices can only have looked to their fellow R/C enthusiasts and hardware. be quoted on a specific basis. For ordering to purchase their surplus production. Stage II is the same as Stage I but includes information contact Gary Walker Models, Then we have the builder who has

MAY 1989 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 65 FROM Technopower II The “C” Series Family of Fine Scale Radial Engines 9 cyl. — 4.059 cu. in — 73 oz. 7 cyl. — 3.157 cu. in — 62 oz. 5 cyl. — 2.255 cu. in — 52 oz. All are 9 in. dia x 3 7/8 in. back plate to prop, driver

TECHNOPOWER II INC. 610 North Street Chagrin Falls, Ohio 44022

Ξ Ξ SEND $3.00 FOR BROCHURE

progressed a step or two further and has de­ planes in a four-plan set offeringfor $39.95." Such are the folks who keep Mercedes, vised a system w hich produces ARFs in I'm highly impressed with everything BMW, and Rolex thriving. Probably a quantity. However, he still manages to re­ Walt has to say, and I think we can all agree goodly number of these consumers of cus­ tain a custom quality in his product, and that his is no garage type operation. He tom models are entirely capable of doing just such an entrepreneur we find in Walt maintains an inventory and fills his orders outstanding model building themselves, Popaden jr. of Tampa, Florida. Let's let W alt in a thoroughly business-like manner. He and because of this they are discriminating tell us about his operation: has invested a great deal of time and effort in the caliber of models they buy. "I currently have over 150 planes built-up in providing the customer with an excellent Another buyer of ARFs may purchase a in stock at my warehouse. I have a full-time selection of models from which to choose. particular airplane only to place it on dis­ designer, Ernie King, and two full-time W hile I haven't yet had an opportunity to play. There are significant numbers of builders. I also use as many as six part-time personally examine or test one of Walt's de­ model buyers who are actually collectors. builders during the year. signs, the photographs of his models indi­ They are interested only in purchasing "I provide ARFs in both electric and gas cate that he maintains a high degree of finely made models to place on display and versions. I currently have four new very quality. For further information, contact would no sooner fly one than they would competitive electric designs by Ernie King Walt Popaden, Jr., Models in Motion, P.O. expect the Smithsonian to fly their museum which I offer as a plans package for $39.95, Box 22083, Tampa, Florida 33622, tele­ airplanes. They buy these just for the sheer or as complete, ready-to-fly units. As an ex­ phone (813)725-1900. pleasure of looking at them, and as conver­ ample, I offer the Am p Eater, a sport electric For those readers who have never pur­ sation pieces. There is also the collector for 035 to 05 power systems, with three- chased a custom built model before, we who may buy models as an investment, as channel operation (Cannon micro radios have endeavored to provide some insight there is a lively resale market for truly high- installed) as a complete ready-to-fly pack­ into what is available and what kinds of quality airplanes. age for $595.1 offer gas sport planes in two- builders are catering to the R/C community. So, whether you are an active flier of cus­ cycle .28 cubic inch or .40 four-cycle: a .40 W e have dealt with three typical operations tom ARFS, or interested only in collecting cubic inch two-cycle or a .61 four-cycle; and ranging from a single individual working as models, or a rank beginner who can afford a .60 cubic inch two-cycle com pletely a hobby in his home all the way to a full­ to buy the very best in an R/C trainer, take a ready-to-fly from $495 to $895 with the lat­ blown model construction business. good look at the offerings of the custom ter price range including engines and W ho would be the buyer most interested ARF builders. They are a small but valuable radios. in these models? Probably well-experi­ group and we are most fortunate to have "M y client list spans ten years and num­ enced R/C fliers w ho appreciate quality as them in our hobby/sport. · bers over 200 with many being repeat or­ represented by outstanding workmanship ders, some buying as many as two or three and for one reason or another do not or can­ Peanut...... Continued from page 53 models a year. I fully agree to refunds if the not build their own models. Most such in­ plane is not used and my customer is not dividuals norm ally buy standard factory- and softer stock for uprights and cross­ satisfied with the workmanship. My built commercial ARFs, but there is always pieces. The sheeted portion of the fuselage designer and I use the logo 'Models in Mo­ the person who hates to run with the crowd is made from very light 1/32-inch stock, and tion.' We also have some special perfor­ and can afford to spend a bit more to in­ the stringers are 1/32x1/20 medium. The for­ mance oriented four-cycle designed sport dulge in his taste for quality and status. ward bulkheads (to the point where the

66 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER (FROM NORTHWEST HOBBY Η ο bb y S up p / y SUPPLY) _11 ...... , PPylon if l/i n Racing Specialty Quickie 500 Racer Outlet H older o f th e NW Q u ickie 500 Record!!!

RC ENGINES KITS Complete Fiberglas and 2 CYCLE RETAIL BUY NOW! Foam Kit! All hardware O .S. MAX RETAIL BUY NOWIt GREAT PLANES and wood included!! 2 5 FP 94 .9 5 53.95 PT 4 0 TRAINER 64 .9 5 47.95 3 5 FP 99.95 54 .9 5 AEROMASTER BIPE 124.95 87.95 only 4 0 FP 104.95 56.95 ELECTRICUB-DELUXE 74.95 54.95 4 0 S F ABC 194.95 106.95 ELECTROSTREAK 74 .9 5 53 .9 5 $ 7 9 .9 5 4 6 S F ABC 219.95 115.95 61 SF ABC 294.95 157.95 PRATHER LILTONI 145.95 1 19.95 61 SF ABC-P 349.95 192.99 CARL GOLDBERG BUPBRTIORE SUPER CHIPMUNK 109.95 69.95 G 40 SPORT 119.95 72 .9 5 EAGLE 2 84.95 62.95 BUILDING G 49 SPORT 129.95 77.95 GENTLE LADY 34.95 22.95 S40 ABC W/M 154.95 92 .9 5 SUPPLIES S 4 5 ABC W/M 159.95 94 .9 5 SIG CARL GOLDBERG S61 ABC W/M 219.95 127.95 SPACEWALKER 329.95 219.95 INSTANT JE T 1/2 OZ 2 .59 S3000 1.8 CU 284.95 175.95 KADET MARK II 64 .9 5 49.95 INSTANT JE T 1 OZ. 4.29 X 40 PYLON 199.95 144.95 KADET SENIOR 74.95 57.95 INSTANT JE T 2 OZ 6.89 KOUGAR MARK Π 44.9 5 SUPER JE T I OZ 4 .69 K & B SUPER JET 2 OZ 6.89 20 SPORTSER 62.00 37 .5 0 AIRTRONIC8 GIANT 4 OZ SIZE 12.89 4 0 RC W/M 100.00 62 .9 5 JETFIRE 20 46.95 HOBBYPOXY FORM 2 6.25 45 SPORTSER 84.00 49.95 JETFIRE 40 54.9 5 HOBBYPOXY FORM 4 9.50 120.00 74 .9 5 61 RC W/M GOLDBERG EPOXY PLUS 9.20 99 .9 5 59 .9 5 65 SPORTSER PACER ZIP KICKER 2 0 Z 4.75 PACER ZIP REFILL 8.75 ROSSI LOCTTTE SPRAY ADHES. 6 .35 ROSSI 40 ABC 199.95 123.95 LOCTITE 242 THREAD LOCK 2.55 ♦NEW FUTABA* TITEBOND ΘΟΖ 2 .45 YB/PUTABA TfTEBOND 16 OZ 4 .19 205.95 127.95 4 5 FS ♦♦RADIOS** DREMEL 3950 TOOL 1169.9511 4 5 FR 205.95 127.95 DREMEL 5 72 DLX ΜΟΤΟ 61 FS 279.95 167.95 ATTACK 4NBL W/ 3 SERVOS 1 12.95 SHOP 97 .9 5 61 FR 279.95 167.95 ATTACK 4NBL ELEC W/SP. CON. 179.95 DREMEL FREEWHEELER 64.95 ATTACK 4NBL MINI W/2 S133 S 159.95 GLOW PLUG TAP 4.95 FOUR CYCLE? 5UA AM W/4 SERVOS 209.95 STA-BRTTE SILVER SOLDER 5.75 5UAJ FM W/ 4 SERVOS 239.95 O.S. MAX FS 26 SURPASS 209.95 123.95 5UAP PCM W/4 SERVOS 299.95 SANDPAPER FS 40 SURPASS 259.95 133.95 7UAJ FM W/4 SERVOS 296.95 WE HAVE 1000, 1200 AND 7UAP PCM W/4 SERVOS 409.95 FS 48 SURPASS 299.95 168.95 1500 GRIT SANDPAPER FOR ALL FS 70 SURPASS 349.95 207.95 9 VAP PCM AIRCRAFT 699.95 YOUR FINE FINISHING NEEDS!! FS 91 SURPASS 399.95 234.95 FS 120 SURPASS 549.95 299.95 SERVOS FT 160 539.95 S48/ S148 STANDARD 17.95 FT 2 40 587.95 S30/ S130 BALL BEARING 33 .9 5 S33/S133 MICRO SERVO 33.95 For Immediate Shipment: ΒΛΓΓΟ S34/S134 QTR SCALE SERVO 39.95 FA 5 0 199.95 152.95 CALL: 13.99 FA 80 264.95 191.50 AM CRYSTALS (PAIR) FM CRYSTALS (PAIR) 22 .9 5 1-800-541-0645 FA 2 70 899.95 629.50 (N ational W a tts, In cl. WA) TS/fVTABA Info and Local Residents: YS 120 FS W/PUMP 357.9 5 !! (206) 531-8111 RACING ACCESSORIES HOURS: PERFORMANCE SPECIALTIES Moo - Fri 10:00 to 7:00 pm FIREWALL MOUNTS FOR: Saturday 10:00 to 6:00 pm CONTROL LINE!! OS. SUPERTIG RE. K&B AND ROSSI 15.25 Sunday 12:00 to 5:00 pm ΚΓΓ8 2" ALUMINUM SPINNERS 21.25 (Pacific Standard Time) SIG BANSHEE (.35) 26.95 2 .25” NYLON RACING WHEELS 5.95 SIC CHIPMUNK (.35-.40) 41.50 AXLES FOR RACING WHEELS 2.50 Mail Checks and Money 2.00 SIG MAGNUM (.40 .60) 59.95 AIR SHRINK TUBING O rders T o: TOP FUTE GE1SEKE NOBLER CALL!!! O-RINGS FOR FI PIPES (10) 4.75 ALUMINUM MOUNTS FOR OS VRP Efisjuatea OR SUPERTIGRE X40 19.95 NORTHWEST HOBBY SPINNER ADAPTER FOR X-40 3.00 O S 3 5 FP-S 49.95 SUPPLY OS 4 0 FP-S 52.95 FOX 35 STUNT 31.50 REV-UP RACING PROPS (DOZ.) 2 8 .5 0 P.O. BOX 44577 ST 6 0 CL 89.95 TACOMA, WA 98444 (WE ALSO FLY CONTROL LINEIII1 PLASTIC FUEL LINE HEMOSTATS 2 .00

RSK ABOUT OUR WEEKLY SPECIRLS — EHCEPT FOH OVERSIZE PACKAGES PAYMENT: Visa, Mastercard, Discover Card, Checks and C.O.D. (C.O.D.'s will be sent Cash Only until account is established) nSRMS:Please allow 3 to 4 weeks for checks and money orders. Credit Cards will not be charged until we ship your order, trices are valid through March 1, 1989, and are subject to change. Authorized returns only! Returns may be subject to a cMix k:nu lee. Washington StaLe residents please add 7.8% sides Tax.______

M AY 1989 67 household ammonia and about a quarter bottle of Dr. Martin's in a 3-oz. airbrush bot­ p JA 11 Q A F p , When your equipment fails, tle. Spray this mix on the tissue. The first ■ M I L w # % · E ■ Ram keeps your models safe! coat is aw ful— but have faith. A llow it to dry, #RED 09 Battery Backer (redundant Rx. battery system) $39.95 and repeat until you get a nice "aged" look. # RED 10 Dual Servo Setter (auto, controls 2 servos) $39.95 D o let it dry between coats, as it's hard to # RED 11 Audio Battery Alarm (monitors 4.8 or 9.6 volts) $19.95 judge the shade you're getting when the tis­ #RED 17 Transmitter Switch Alarm (beeps when Tx is “ON’) $19.95 sue is wet. Though the photos don't show it, #RED 18 Big Airplane RF De-Glitcher (kills long wire RF) $ 8.95 I got a bit carried away, and my Martinsyde #RED 25 Big Model Battery Backer (V* scale version of 09) $49.95 is, I'm afraid, a bit more orangey than # RED 32 Battery Peak Detector (protects R/C car battery) $29.95 antique. #RED 37 Simple Servo Setter (auto, controls 1 servo) $19.95 The nose block and the portions of the THE ORIGINALS... Still the best! fuselage shown in the photos are silver. The • SEE YOUR DEALER · SEND STAMPED ENVELOPE FOR RAM INFO numbers on the rudder are black, and the II unavailable locally, send check, money order or full credit card info for the cost of the item plus Union Jack consists of a blue field, broad $2.00 ($5.00 foreign) f o r immediate shipment. Include full address for U PS. Sorry no CO D white crosses with thinner red crosses su­ T O m 4736 N. Milwaukee Ave. — Chicago, IL 60630 perimposed on them. These markings, by the way, appear on an actual Martinsyde S-1 shown in War Planes of the First World War, Volume One: Fighters, by J.M . Bruce. The wings have no spars, and if you were The Revised Lightweight careful, the tail surfaces are very light. This translates to a gentle application of alcohol Dual Spoiler Module to shrink the tissue, followed by pinning the flight surfaces to a flat surface until the alco­ The dual spoilers are made from rigid PVC and weigh only hol dries. 3 oz. per set. In theclosed position total *oah is 1 Vi" modifiable ASSEMBLY to 1 With unmodified blades fully extended the total oah is Meditate fora while, since itty-bitty bipes 2 Ά The modules accuate extremely smooth and easily. A are a pain to assemble. If you've been care­ single module is V5i thick x 6" long. Modules can be ganged ful with the fuselage assembly, careful with end-to-end for longer and increased surface area. Only $14.95 per set. Ask your local hobby shop today. the lengths of the cabanes and careful with Dealers ask Ace R/C, Inc. for details. the alignment of the fuselage sides, you *oah - overall height shouldn't have too much trouble. Another big assist comes from leaving little "nubs" ALTEC PRODUCTS, INC. on the cabane and interplane struts. Then I 18800 St. Rt. 47E · Sidney, O H , 45365 use a needle file to drill holes in the balsa 1513) 498-1721 mounting positions in the wing center sec­ tion and outer w ing panels. The strut "nubs" then glue into the holes. I find this stringers start) are soft 1/2 0 , w hile the two aft tween two pieces of 1/32, and forms the locks the structure in place nicely. If you've bulkheads are soft 1/32 stock. crosspiece. The wheels are two laminations got a better system, by all means use it. I put WINGS of soft 1/20 stock that have been bushed the tail-feathers on first (using a piece of The top and bottom wings are identical, with small pieces of 1/16-inch birch dowel. 1/32 balsa under the stab to provide the with some minor differences in the center The inner wheel covers are discs of bond decalage called for on the plans), then the section. The solid lines shown on the plan paper that have been covered with tissue lower wing (measuring between the stab in the rear of the center section show the and glued to the wheel. The outer wheel and the w ing to assure myself that the w ing construction for the upper wing; the dotted covers are larger discs from which a pie­ is aligned properly with the stab), and then lines are for the lower wing. There is, natur­ shaped segment has been removed, allow­ finessed, tweaked, teased and torqued the ally, one exception to this rule. The piece of ing them to be bent into the flat cone shape upper w ing to fit. The interplane struts are 1/8 x1/20 that is shown in the rear of the up­ shown on the plans. The cowling is fabri­ added last. This is a fine application for a per wing's center section (part of the ca- cated by the time-honored method of Titebond type of glue, as you'll want time to bane attachment structure) should be choosing a soft block of balsa, and carving move parts around. Last, the landing gear is duplicated in the lower wing, and w ill form away anything that doesn't look like the installed. the attachment structure for the rear ends of cowling. I did some additional hollowing of M y ship weighed just under ten grams, the landing gear legs. The leading edges are the finished block as well, more to give me sans rubber and ballast. made from springy 1/16 square stock, the room to install dummy cylinders than to FLYING trailing edge from soft 1/2 0 x1/8 , and all ribs reduce weight. The cylinders are the I firmly believe that no two Peanut scale from soft 1/32 sheet, except the ribs in the smallest William s Brothers models, gussied models of the same aircraft exhibit the same center sections and at the strut attach up with balsa heads and wire pushrods and initial flight behavior. Given the size of the points. These ribs are made from soft 1/20- spark plugs. The prop is a 4-3/4-inch Peck models, I'm not sure that one fellow can inch stock. The wing tips are two lamina­ unit. I'm not out to set any records with this really duplicate another's weights, inci­ tions of 1/32 that have been soaked in water, airplane, and the Peck prop is very durable. dence angles, etc. In any event, here's how glued, and bent around a waxed cardboard FINISHING AND COVERING my Martinsyde behaved: using a loop of form. My references showed about six photos .100-inch rubber about tw ice the hook-to- TAILFEATHERS of the Martinsyde, all in that wonderful peg distance, I needed a lump of lead putty Remember, this airplane has no nose. shade of gray that exists only in W W I pho­ (great stuff, found in fly-fishing stores) about Keep the tailfeathers light. If you don't auto­ tography that could equally well represent 3/4 the size of a pea to bring the balance to matically weigh your balsa, now is a fine khaki, olive drab, doped linen, or metallic the 20% point on the upper wing. Powered time to start. I used 5 lb. stock. O n ce again, magenta. I made a judgment call, and flight showed a pronounced power stall- the outlines are formed from two lamina­ opted for "antique." To get this mysterious spin to the left. I added down and right tions of 1/32x1/20 soaked and bent around a parchmenty shade, I used Dr. P.H. Martin's thrust, and wash-in on the left w ing panels. waxed cardboard form. Radiant Transparent Water Color (yellow Then a tad of left rudder was added to help MISCELLANEOUS ochre) applied to the tissue with an air­ the turn. The landing gear legs are made from brush. First, mount the tissue in a shrinking I found the Martinsyde to be challenging some 11 lb., 1/20 stock. The only wire in the frame of some sort. Then mix 1-1/4 oz. enough to hold my interest, without being gear is some .0 2 0 that is sandwiched be­ water, 1-1/4 oz. isopropyl alcohol, 2-3 drops difficult enough to make me think about

68 MODEL BUILDER taking up origami. W ith its old-timey looks, it's a great crowd pleaser, as well. I hope you enjoy your Martinsyde! - · NEW! Hobby Lobby’s BY POPULAR REQUEST E le c tric ...... Continued from page 25 NEW! FREE! one nudge doesn't do it, use another. Never LARGE SCALE hold the stick to one side. The plane should CATALOG 1 3 never make a steep bank; ten degrees is ENGINE CYLINDERS maximum. O ver that, and the plane will start to dive. A dive w ill require up elevator is r e a d y to control, and most beginners w ill fail to do it successfully. This is where an experi­ NOW! enced flier can step in and save your plane. Dozens of NEW items, The only two exceptions to this situation (even breakthroughs!) that I know of are the Leisure Playboy and the Brigadier; if left alone they will recover in RC electric flight, by themselves. Almost all other planes will electric fast boats, not. and The beginner should leave the elevator NEW alone. Overcontrol on the elevator can lead full-color photos to a stall w hich can turn into a spiral dive, or of Hobby Lobby’s a roller coaster which often turns into a spiral dive. Most beginners w ill not be able greatest products! to recover from a spiral dive. Elevator is not Call us at (615) 373-1444 needed in turns if the turns are shallow. A or send the order form. good trainer should be able to land without FREE IN THE USA elevator inputs. It may land nose low, but Outside USA Send S2.00 that is much better than using up elevator, stalling, and hitting straight in. A nose-low Call for FIRST CLASS Mail. landing is very hard on gearboxes, though, so I recommend that the landing gear be ex­ S2.00 — bill to your credit card. tra long, or use large wheels. The best procedure for a beginner is to 0 _ i leave a little bit of left or right turn trimmed in, so the plane w ill fly around all by itself in Molded of high-impact styrene, large circles. If it's stalling, it usually is these dummy cylinders feature caused by too much up elevator trim or not deep cooling fins for utmost enough downthrust in the motor. Put in a realism. Both the Wasp and little down trim. If you can turn off the mo­ Whirlwind types of cylinders tor, do so and see if the plane settles down. are available in two different If it does, you need more downthrust on the large scales: l/5th (2W = 1') motor. This is very common, especially in l/4th (3" = 1') powered glider designs like the Electra, Amptique, and Electric Malibu. Kits include assembly instructions. Last, but not least, never let the plane get Smaller sizes are also offered. far away. You should always be able to easily Note: These units may be modified tell what the airplane is doing. If it gets too to resemble other cylinder types. far away you cannot tell which way it is turn­ ing, and most beginners will (you guessed Send $3 for full-color catalog, featuring it) spiral it in! If you do teach yourself, you aircrafl paintings suitable for framing. are brave. It can be done, but be ready to do a lot of repair. WILLIAMS BROTHERS INC. D EPT. MB I recommend 100 watt motors (05) with 181 PAWNEE STREET six cells, either direct drive or geared. I per­ SAN MARCOS sonally prefer direct drive, as it is simpler CALIFORNIA 92069 mb and costs less, but geared does have a better climb on powered glider type models. Any sub-C six-cell pack on the market w ill do a net's planes. The Astro Porterfield is a nice Name good job, as will any charger designed for flying plane, and would be a good one, but sixsub-Ccells. A beginner can use anything it is so pretty that a crash would be dishear­ from a cheap two-channel radio to the four- tening. M y guess is that the Telemaster type Street Address channel; choose what you prefer or can af­ planes sold by Hobby Lobby would make ford. Two channels with the on-off slaved to excellent electrics, but adapting them City elevator or rudder works just fine. On-off is would be part of your learning experience. all a beginner needs, but a speed control is Larger Old Timers are excellent, and John certainly handy if you want and can afford Pond has a wonderful plans service for just State Zip one. about any you could want. This is the best Som e do want to start with planes larger way to start with large electrics, I think. The than the 1 00 watt size, w hich are usually in Buzzard Bombshell and the Buccaneer HOBEYIPBBY INTERNATIONAL, INC the 2.5 to 3.5 lb. range. You do have more would be good ones. Those w ho are start­ financial investment in larger planes, and ing in electrics but who are already good 5614 Franklin Pike Circle more emotional factor. I recommend either fliers w ill find that the Bridi kits, the Sig Brentwood, TN 37027 the 15 or the 40 size motors. Unfortunately, Seniorita, and Senior Kadet will be a good (615; 373-1444 there are almost no kits or ready-to-fly start. The 15 and 40 electric sizes are "right" planes for 15-40 electrics, much less begin- for flying at club fields, as they are compati-

MAY 1989 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 69 VINYLWRITE CUSTOM LETTERING Providing an elegant, time saving and economical finishing touch for modelers. • EZ TO APPLY · Our lettering comes to you pre-spaced & pre-aligned. Saves hours of cutting & the fuss of aligning individual letters. These are not decals. Your text is custom computer cut in 3M Premium

PROTECTIVE BACKING cast vinyl · only 2 mil thin · vertical or horizontal text · custom lengths · 15 colors 6 typestyles inc. Military Block · slanted or upright text · W to 12" high Priced right with no minimum charge! For example, you can have your AM A number in 2 " high text, any color, for only $3.00 + $1.25 P & H. Call or write for complete info All ordm processed upon receipt I pack & sample IT’S FREE! and shipped via first class mail. | F ly VINYLWRITE CUSTOM LETTERING 16043 Tulsa Street VINYUVRITE Custom Lettering Granada Hills, CA 91344 on your model today! (818) 363-7131 (Noon to 6 PM Pacific) · Mail order onlj/l CA res, add tax. ·

Old Timers without the necessity for scratch building, it would be well worth your while to take a look at the Hobby Horn kits. Thanks, Howard! For now, start the year right, fly electrics!·

B rim fie ld ...... Continued from page 24 CHAMPION FF KITS: ish around the port engine cowling. Ed will "Wake-Up" Wakefield ...... $48.00 "Champion C oupe"...... $28.00 be back after corrective surgery. "Upshot" Mulvihill...... $26.50 Nelson Whittney brought a collection of CHAMPION RUBBER intricate electric-powered craft. The most 1/8, 3/16, & 1/4 w id th s .040 th ic k . outstanding was a Sikorsky S-38 flying boat $12.50/lb. Box* powered by two Astro 25s. The small size of C A T A L O G S 1.50 the model could not cope with the waves, CHAMPION MODEL PRODUCTS and a water-caused short prevented it from 880 Carmen Ct., La Verne, CA 91750 flying. Construction was not unlike a large •£r MEMORIAL DAY W EEKEND ☆ (714) 599-3348 scale rubber model, with dozens of struts, wires, and working hatches. The radio is MAY 27'28'29 * includes US dekwy v«UPS C t N twdeots add 8% sales ta* carried in the upper wing. T A F T , CA The largest model by far, and the one that AAAA SANCTION attracted the most attention, was a monster Electric Martin Mariner PBM built by )ohn Nico- ★ lacci. Even at about 1/12-scale it was huge. ■6 AMERICAS PREMIER FREE I LIGHT MEET t r Not as well known as the Catalina PBY, the ☆ AMERICA S PREMIER FREE FLIOHT SITE ύ P B M was the second most numerous U.S. ■ύ SAME DATE. SAME LOCATION...... FOR 19 YEARS' ύ flying boat in W W II, with over 1,400 built. It

★ FREE FLIGHT AT IT ’S BEST ★ also has the curious honor of being the only flying boat to alight on dry land and take off ★ again, after the repair of an engine problem -ttA M A iz F A lirO L D TIMER ύ SCALE i t NOSTALGIA ύ Has Brake \ ^ 2 month Lightweight 1.2 oz. \ money back and passing an airworthiness inspection. I • it SPECIAL EVENTS-Cr INDOOR-Cr Adjustable switching point guarantee Solderless terminal for easy hookup - understand the model was originally built ★ fora movie and then retained by the builder ON SITE CAMPING OK (NO HOOK UPS) Controller $24.95 More Power, save weight when he learned the mov'ie company was FOOD S LODGING WITHIN 15 MINUTES Very high efficiency only 0.06V loss at 20 A. Size 2.2»IJ*.63 going to scrap it after the film ing was done. ★ Add $1.00 for shipping The PBM has made about every Brimfield FOR ADVANCE ENTRY OR OTHER INFO California residents add $1.63 Tax • fa SENO SASE TO ^ Send Check or money order to meet and was entered in the 1985 Nats at PO BOX 4203 CARLSBAD CA 92008 High Sky Westover AFB, Massachusetts. The crowd 3929 Kansas St. #9 San Diego,CA 92104 was in awe at the scale JATO (Jet Assisted Takeoff) using several Estes rocket motors. The craft also sported on-board electric STRIPPED SLOW PUIS THREADS? Powerhouse, powered by an Astro 60. This starters. The design was well thought out, 4-stroke heads are expensive and difficult to replace. We is a good example of what I said earlier with many access hatches able to be replace your damaged threads with a stainless steel 1/4*32 insert, long or short. Much stronger than original about Old Timers making good large elec­ popped on and off in a blink. The wings are aluminum or brass threads. Engine disassembly NOT trics. The Powerhouse uses twenty-four 800 attached in an unusual manner: the roots necessary. 2-strokes repaired also. Cashiers check or mAh cells, weighs 7 lbs., has 1200 sq. in. have matching piano hinge sections that money order only (no cash) $13.95 per Insert plus $2.00 return freight (within continental U.S.) and uses a 14x8 prop. It climbs about 800 are mated with lengths of wire that nor­ S e n d t o : W.P.S., 15208 Raymer St. plus feet per minute. Thanks, Colin, for the mally serve as the hinge, but in this case, Van Nuys, CA 91405 · (213) 873-4696 info! lock the wing roots rigidly to the center- Howard Lazerson flies his 67-inch Q uaker section. The realistic flights were marred ble with the flight habits of everyone else at Flash with an Astro 25 direct drive, fourteen only by the loosely attached tip floats, de­ the field. I am very interested in your experi­ 900 mAh cells and an Astro speed control. signed to prevent damage, which came off ences; if you have taught yourself to fly on It weighs 4-1/2 pounds and uses a 9x5 Top in the waves; John had to taxi back by care­ your own with an electric, or are flying the Flite prop. It flies well and takes off in less ful use of his differential throttle feature. 40 size electrics, drop a line and a photo and than 20 feet. Howard thinks it would do Overall construction is foam and fiberglass you too can be famous! well on floats. The Q uaker Flash is a Hobby and power is by two .90s. Colin McKinley sent a photo of his Horn kit; for those w ho would like to build Reluctantly, we all had to pack up and

70 MODEL BUILDER Performance Blended Fuels Higher Performance · Smoother Running Superior Lubrication · Unequalled Rust Protection Now, a full line of fuels CONSISTENTLY BLENDED for your specific use! SEE YOUR DEALER FIRST! If he doesn’t stock Byron Originals Fuels, order direct. ALL PRICES INCLUDE FREE FREIGHT. (Contiguous 48 Slates Only -Alaska, Hawaii, and Overseas, call for shipping quote.) FACTORY PRICE PER GAL. ORDER NO. NITRO FUEL BLEND RETAIL (CASE OF 4) CASE % PER GAL. 1-4 CASES 5 CASES & UP Synthetic/Castor Blends 3130004 0% Premium F.A .1., Synthetic/Castor...... S 9.50 $ 6.90 $ 6.40 3130005 5% Byro-Jet Synthetic/Castor...... 10.95 8.00 7.50 3130006 5% Premium Sport, Synthetic/Castor...... 10.95 8.00 7.50 3130008 8% Premium Super Tigre Blend (2500 & 3000)...... 11.95 8.60 8.10 3130010 10% Byro-Jet, Synthetic/Castor...... 12.95 9.00 8.50 3130011 10% Premium Sport, Synthetic/Castor...... 12.95 9.00 8.50 3130012 10% 4 Cycle, Synthetic/Castor...... 12.95 9.00 8.50 3130016 15% Premium Sport, Synthetic/Castor...... 15.95 10.75 10.15 3130017 15% 4 Cycle, Synthetic/Castor...... 15.95 10.75 10.15 3130020 20% Byro-Jet, Synthetic/Castor...... 17.50 12.50 11.75 3130025 25% Premium Competition, Synthetic/Castor...... 19.95 14.25 13.35 3130035 35% Premium Competition, Synthetic/Castor...... 24.50 17.75 16.50 3130045 45% Premium Competition, Synthetic/Castor...... 29.25 21.25 19.65 Straight Synthetic 2120004 0% Premium F.A .I., Straight Synthetic...... S 9.50 S 6.90 $ 6.40 2120005 5% Byro-Jet Straight Synthetic...... 10.95 8.00 7.50 2120006 5% Premium Sport, Straight Synthetic...... 10.95 8.00 7.50 2120010 10% Byro-Jet, Straight Synthetic...... 12.95 9.00 8.50 2120011 10% Premium Sport, Straight Synthetic...... 12.95 9.00 8.50 2120015 15% Premium Sport, Straight Synthetic...... 15.95 10.75 10.15 2120020 20% Byro-Jet, Straight Synthetic...... 17.50 12.50 11.75 2120025 25% Premium Competition, Straight Synthetic...... 19.95 14.25 13.35 2120035 35% Premium Competition, Straight Synthetic...... 24.50 17.75 16.50 2120045 45% Premium Competition, Straight Synthetic...... 29.25 21.25 19.65 Minimum Order Quantity-1 Case. Shipping included in Price. Prices subject to change without notice. Dealer Inquiries: Phone (712) 364-3165 Byron Originals, Inc. · P.O. Box 279 · Ida Grove, IA 51445 · Fuel Orders Only: (712) 364-2009 leave before 5:00 p.m., when the park peo­ ple closed and locked the gates. Barring wild weather, the next Brimfield Float Fly HAVE YOU TRIED FULL-SCALE7 promises more action. This time I vow not AFTER YOU DID ALL THE WORK, WHY LET to be a beach-sitter and will get in more float time. You have to experience the thrill YOUR AIRPLANE DO ALL THE FLYING? of flying off water. Come to Brimfield with in f o $3.00 BUILD & FLY THE m iniM A X YOURSELF! your creation this spring and let's do some spash-and-goes! ·

Big B ird ...... Continued from page 3 7 regarding aerobatics and maneuvers (the A M A Rule Book is a good example) usually include sketches showing what the plane should do and a blurb describing how to get the plane to do it. However, Tom Triol decided to take a dif­ ferent approach in getting pilots to under­ " 3 Axis Control stand the "how-to" of many standard AWARDED SUN-N-FUN 8 6 P ^ o T S h f * Easy Construction maneuvers. He simply drew pictures show­ 'Most Innovative New Design" · wood Construction ing the position of the sticks (M ode II) for TEAM INC.. BOX 338M. BRADYVILLE. TN 37026 (615) 765-5397 each maneuver. Remember that these drawings show ba­ sic positions and that in many cases control ing site just outside of Billings, Montana. Write to Event Director Donald Hering- surface throws may have to be increased, They figured that since the Annual IMAA ton, 1401 Central Avenue, Billings, Mon­ balance points moved back a tad and stick Rally O f Giants is kinda far away, it'd be eas­ tana 59102, for the flyers. twiddling refined and polished in order to ier for folks up here in the Northwest to June 14-18: This is the Big One, IMAA's achieve the desired results. But the accom ­ meet old buddies and enjoy three days of Annual 5-Day Rally of Giants at Odessa, panying chart should get you moving in the flying fun if there was only a day's travel Texas. The W est Texas M agnum Squadron right direction (sorry, but I couldn't resist time involved to get to the fly-in. (IM A A Chapter 172) is in charge and they've the pun). There's unlimited space available for been working their collective tushes off to BIG BIRD SOCIAL CALENDAR campers, RV's and such, and motels are make sure everyone's gonna have an out­ June 9-11: The Billings Flying Mustangs only 12 miles from the field. Food, drink standing time. (International Miniature Aircraft Associa­ and sanitary facilities will be on hand and Registration forms/flyers are available tion Chapter 203) will be hosting the very there are no external frequency problems to from Festival Manager Robbie Carson, first IM A A Regional Fly-In at their B-l-G fly­ sweat. 6576 Am ber Drive, Odessa, Texas 79762

MAY 1989 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 71 ■ MINI-

MINI POWER AT ITS BEST: LIGHT WEIGHT QUICK CHARGE • QUIET · INSTANT START · LOW COST · CLI MOTOR/GEARBOX · PROPS PROPULSK ITEMS CHAF*RGERS/BATTERIES HY-70 $14.95 VL-111...... 1 $24.95 EFC-500...... HP ...... 7 to 1 gear ratio. engage or disengage Free- Includes HY-70. B 62Q Props. Charge Cord and Low cost Quick Charger B B ^ Wheeling 19 grams witl nchided) snaps onto motor Connector, and Acci . spacers, e tc ) 4 · D" type batteries (rut included). FC-402...... HY-70R...... $17.95 VL-111 R ...... ,...$ 2 7 .9 5 Ideal for accurately Same as HY-70 but with ler 7VT leads with Quick Same as VL-111 but Remote Battery Holder. Above chari Disconnects Slide Batti Motor. (To substitute B o f above add S3 00)

HY-70 an d HY-70R are l· 30 size m odels FLIGHT BATTERIES VL-102. $32.95 B-62 (HY-70) 2 x 50 mA-Hr - 9 graj HY-42...... $13.95 Includes HY-42 Motor. P-1 Prop J Jattery. SJ-5 Switch, B-63 (HY-70) 3 x 50 mA-Hr - 13 gi Improved version ot HY-48 A pp ro w fte:/ equivalent to .02 fuel engine Charge Plug and Cord. Accessory Ϊ ist ructions B-33L (HY-42) 3 x 100 mA-Hr - B-34L (HY-42) 4 x 100 mA-Hr- MAIL ORDERS: Add $2.00 Shipping & Handling B-13L (HY-42) 3 x 180 mA-Hr - 34 grams California Residents add 6n % Sales Tax B-14L (HY-42) 4 x 180 mA-Hr - 45 grams PRODUCTS Send S i.00 for Complete. Illustrated Catalog B-303L (HY-42) 3 x 450 mA-Hr - 84 grams • 7871 ALABAMA AVENUE • #16 · CANOGA PARK · CA 91304

" There,' Sal said, 'leave it dry and when it's dry, just pull the Saran W rap off the tear.' "I could hardly say anything. It was sim­ ply amazing the way the silk adhered to the Saran Wrap and how the glue spread out Stainless Steel! evenly over the tear. I had trouble keeping NI-STARTER® From McDaniel R/Cis now from pulling the Saran Wrap off too soon, but I bided my time and when dry, which made with stainless steel. So, along with the was only a few minutes in the hot Vegas air, quality and reliability you’ve come to expect ^STARTER I pulled the Saran Wrap off and presto! The from McDaniel, you now have longer life. r-sIRfC Inc. 12208 Gi tear was repaired perfectly. No gaps or ttt. M D 20769 (30 I curls, and you could hardly see it was torn. • Dual -face ampmeter indicates plug condition when attached------sW*.fD272901 tfMC'l The payoff was when Sal sez, 'Don't throw • 1650 ma/hr rechargeable battery provides 35% more starting power the Saran Wrap away, you can use it over than regular nicads. again.' • .020' wall stainless steel tube, stainless steel spring, direct connecting "Now, this has to be one of the simplest, high temp, teflon wiring with beryllium copper electrode. No sliding yet most efficient ways of repairing a nasty contacts to corrode. tear in open silk covered structure I've ever • Positive 6-point P l u g L o c k ’" w ill not strip or wear out.· seen. What's more, it works on tissue cov­ ered surfaces, too. It sure took the cuss out For more information on this and other fine McDaniel R/C products, see your of repairing." local hobby dealer or write: TWO MORE TIPS FOR McDaniel R/C Inc. YOUR FREE FLIGHT ENJOYMENT 12206GuinevereRd..Glenn Dale,MD20769(301)464-2260 Telex:287901 McD-UR From the pages of the VAMPS, Vegas An­ Visa and MC accepted. tique Model Plane Society newsletter (Edi­ tor: Phil M cCary, 532 College Dr., Hender­ We take the hassle out of the hobby! son, Nevada 89015), comes the following, NI-STAKTER· Pulcnl «0272901 f t4AOS.895PH«Udc'”flhtem IVnd i Model 205 courtesy of club member Lee Rose: "1. In order to hold the winding tube in­ side the fuselage on a rubber ship, Lee uses (I've also got some) and are chock full of "Help, police! There are 40 dogs on my a small piece of Velcro on the tube and on anything and everything you'd want to front lawn!" the front of the fuselage to hold the tube in know about the flying site, the city and the "Forty dogs! Are they mad?" place. W h e n he is finished winding he just 5-day Fly-In schedule. Also, be advised that 'Thirty-eight of them are!" pulls the Velcro apart and presto, he can Channel #12 is not operational on the Rally Play it safe for the new flying season: cy­ slide the tube out of the fuselage. Neat trick! Site and that a fire extinguisher is required. cle batteries and test-run engines before 2. Lee also uses a small piece of clear July 29-30: The Puget Sound Rocs (IMAA making that first flight. plastic fuel line under the needle valve Chapter 108) 7th Annual B IG Bird Bash & And don't forget that your questions, an­ spring on those Cox .020 and .049 engines Tea Social will be held, as usual, at the swers, ideas and photos are what make this to keep air from leaking into needle valve Rocs' Roost in Yelm, Washington. Event column work. Al Alman, 16501 4th Avenue assembly and giving those erratic engine Director Bruce G ale (811 9th Ave. S.W., Court East, Spanaway, Washington 98387, runs. It works, so give it a try." Puyallup, Washington 98371) knows how to (206)535-1549. Phil also proclaims proudly that the 1989 treat guest pilots and how to make a fly-in SAM Champs will be held in the Las Vegas memorable. If you need or want more info, vicinity. Free Flight.... Continued from page 52 contact Bruce (or me) for flyers. AND STILL ANOTHER TIP— And in case you're not familiar with piece of Saran Wrap about 3 inches square. MOP HEAD PUNK IMAA, here are a few things you should Next he puts glue on the tear lengthwise, I know, you've seen them on the malls know: 1) these fly-ins are sanctioned by and along the edge of the Ί ' 1/2 -inch tear, and hanging around on the streets, right? both IM A A and A M A ; 2) they are low-key and then places the Saran Wrap on top of Wrong! The kind of punk I'm talking about and noncompetitive so that you can really the entire L-shaped tear. The part of the cov­ here is the kind you use to light your fuse (it let your hair down and enjoy, and 3) the ering that usually curls under as a result of rhymes, doesn't it?). Bill Caiser showed up minimum size requirements for aircraft the tear sucked right up against the Saran at a recent W M C meeting with this little tid­ registered at IM A A sanctioned fly-ins are 80 Wrap, and the glue spread out evenly over bit. It seems that some of the mopheads inches for a m onoplane and 60 inches for a the entire two sides of the tear. He gently sold in stores are made from 1007ο cotton. If bipe. pulled the Saran W rap tight in all directions you look closely, you will notice that the How About This O n e ... while the silk tear held itself tight up against mophead is made up of dozens of foot-long Excited female voice on the telephone: the Saran Wrap. cords. Buy the mophead, and pluck out one

72 MODEL BUILDER of the cords. You will see that the thing looks strangely like a dethermalizer fuse, except a bit more loosely woven. It is prob­ ably not adequate for use as a fuse i n the air­ plane, but it is certainly adequate for use as I a punk, which will save some of that good 12" Span | S5.95 WHY fuse for in-air use. O n top of all of that, these $6.50 mopheads are cheap. THE SLOWPOKE 16“ Span SHOULD YOU HAVE FI) AT THE SIERRA CUP Bruce Augustus took the trip to Sunny I TO REMEMBER TO SoCal and flew in the 1988 Sierra Cup for his first time last October. H e filed a brief re­ TURN ON YOUR port of the meet with me, and I am excerpt­ TRICKLE C ing part of it for this column. I "For the first F1J event ever flown in this RATE? country, no one showed up with anything exotic. Just good flying Cox powered 1/2A models. Some were multifunction, but no $8.50 10“ Span radical designs or materials, and nothing I NEW TOP FLYING MODELS FOR CONTEST & SPORT IN AND OUTDOORS built especially for F1). Martin Gregory's air­ EA. S8.50 plane was a Half-A Night Train, a typical British design with profile fuselage and en­ Drilled Nose Bi Formed L. Gear gine mounted sideways on wood beams. El­ I AAA Light Sheet AAA Strip Wood liptical surfaces and a very nice Ray Monks Japanese Tissue multifunction timer produced a heavy but Hardware & Prop consistent model. Martin hails from Essex, 22" KORDA EMBRYO 20” EMBRYO SPORT England. "Marty Thompson won F1J with a Union I Jack m ultifunction design w hich he says is aging gracefully. Fine craftsmanship on both of these models. There was no flyoff AUTOMATICALLY because Marty was the only competitor to I 13" SCALE AIRCRAFT KITS max out. Walt Ghio entered a RamRod in OUTSTANDING DETAILS. 3-VIEWS & HISTORY F1J, and although it flew very well, there AERONCA K 1937 with an Ace ALCO SPORT 1929 WATERMAN RACER 1921 have been design improvements in the last ZIPPY SPORT A.R.V. HEATH PARASOL 1928 three decades. I found my Hutchinson Mav­ ea. S8.25 AUTO-TRICKLE I 272 pgs RON WILLIAMS BOOK ON erick to be w ell suited to the event. It was 300 tllust. INDOOR MODEL AIRPLANES $15.95 fun flying 1/2A gas in the FAI format, and I INDOOR BALSA PACK $8.25 P-NUT PACK $8.25 You don't hove to remember to flip JAPANESE TISSUE 10 Ige 5 col roll $6.95 the· switch after 14 to 16 hours. Auto- hope the event gains popularity. It appears CONDENSER PAPER 2/$3.25 MICROLITE $3.25 that any competitive 1/2A model will be RUBBER LUBE $1.95 BALSA CEMENT $1.95 Tr: ;.!e does It for you. O n c e yo u 'v e THRUST BEARINGS. Mini Dual or Dual $1.00 nooked the batteries up to the suitable for F1J as long as it isn't too large for I RUBBER 025 to 090. 005 inc ♦ 1/8 & 3/16 $2.65 the 7-second engine run." 6:1 WINDER $5.95 16:1 MARK 1 $12.95 charger, you can Bruce also mentioned that the meet was WE STO CK PECK. R/N. & BRO W N A-23 CO3 forget about consummated with a white tablecloth ADD 10% POSTAGE—MINIMUM POSTAGE $2.00 them awards banquet on Saturday night. A very NEW 18-PAGE ILLUST. CATALOG $2 00 fine affair, Bruce thought, with a full bar and BOX 5311, SALEM, OR 97304 superior meal at a reasonable price. He recommends the Sierra Cup experience most highly. As the description that came with the sam­ Thanks, Bruce, for the report. It strikes me ple indicates, it can be used for either rib­ that the F1J event and last month's Vee-wing less shell types of construction or in a solid you are 1/2A Concept model might be a match. core arrangement. ready to go out ROHACELL Rohacell comes in different widths and again, w hether it's two CONSTRUCTION MATERIALS lengths up to four feet. Thicknesses are days or tw o months later! Talk ab o u t a Just received a small box from Composite from 1mm to 50.8mm. Not all thicknesses 'set 'em, forget 'em* system! Structures Technology, a mouthful of a are available in the two listed weights. Auto-Trickle c a n b e name describing Matt Gewain's new com­ Matt also carries some other neat stuff as incorporated Into any dual output pany. W h a t Matt is doing is marketing a well, for example, fiberglass cloth in very charger that uses the standard ( bunch of hard-to-find exotic and semi­ light weights, special laminating epoxies, overnight charge exotic building materials including the Kevlar 49, and other stuff. 'ate nicest quality foam I have ever seen any­ If you are interested in trying out Rohacell where. The foam is known as Rohacell and and would like more information, drop 34K2CH A c e is available in 3.1 lb. and 1.9 lb. per cubic Matt a letter (enclose an SASE) at Compo­ Aufo- foot densities, so it is very light weight. Ad­ site Structures Technology, 3701 Inglewood Trlcklel ditionally, it is easily worked with the same Avenue #268, Redondo Beach, California asbld. tools you would use to build with balsa- 90278-1110. You'll be pleased you asked. S29.95 wood. The 1.9 lb. stuff is close to the same NEAT BOOK FROM DON ROSS strength as 6 lb./cu. ft. balsa, and the 3.1 lb. Don Ross has been a contributor of rub­ stuff is right in the same strength range as 6 ber powered model airplane designs to the lb. balsa. You can use any adhesive that hobby for many years. I first ran across some doesn't depend upon evaporation, so of his work in the short lived publication, epoxy, polyester and slow drying cyano­ Sig Air Modeler magazine. Well now, Don ACE R/C acrylate work well. Any finishing material has put forth his energy and talent into a 116W. 19th SL, P.O.Box 51112, ftgginsville MO can be used with it, including epoxies, new book for the person w ho wants to get «037 (816)584-7121 FAX (816) 584-7766 dopes, paints, etc. started in or get better at building and flying Complete Catalog $2.00 It is truly a m odem miracle for modelers. rubber powered free flight models.

MAY 1989 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 73 "2. This is tough. Try to pick out some ob­ ject that is beyond where the model landed and between you and the model, to estab­ AIR-BRUSHING lish distance. T H E SEA RC H "1. Assuming the model is 'right over MADE EASIER! there' is an error. Think about the location Using Badger's STEP BY STEP MODELERS GUIDE so it is defined and your head is in gear. TO AIRBRUSHING, you can construct and airbrush Now move toward the model. Before you in detail your next model with more success and have travelled the estimated distance to the ease. Subjects include modeling, figures, diorama model, start zig-zagging to cover an area and scale modeling of a '69 Camero. 32 full color wider than normal vision while walking pages with over 180 step by step photographs straight. Constantly check your sighting showing you the techniques the pros use. See point and its reciprocal so you cover the de­ your nearest Badger dealer, or write Badger fined area. People do not normally walk in Air-Brush Co a straight line, so correct yourself. "2. Still don't see it, eh? Stop! Review how you arrived at the point you are now. Hurry­ Suggested ing causes incomplete eyeball sweeps. Retail Pr'ce (Haven't you ever stepped on the model you r are looking for or run over part of it with the bike?) "3. Walk or ride back to the handkerchief marker. Carefully re-establish where you started and re-walk your first sighting point BADGER AIR-BRUSH CO. 9128WBELMONT AVE·FRAMttJNFARK.IL60131 again. Here is where the sighting point mental picture is valuable. If the second Dtsln Can.Kliby HOBBY INDUSTRIES 24 Ronson Drive RexdateQntano WJW 104 walk or ride to the sighting point is not pro­ ductive, then broaden it. First, re-estimate the distance and go further. N o luck, eh? Re­ turn by walking a zig-zag pattern at least 150 feet w ide and narrowing it as the search n v E R s rrtr point is reached. COLLEGE OF GLUE KNOWLEDGE "4. Re-evaluate all pertinent locations. Question all decisions. Start over, widening the width of your search area and condens­ Slo-Zap ing the distance forward of each zig and Thickest formula. Set time: up to 60 sec­ zag. Keep at it. It's got to be on the ground. onds. Loves hardwood and plywoods. Remember the direction the model was Great for fiberglass to wood. Very strong. travelling when it hit, so your mental pic­ Forms nice fillets. Skin balsa wings easily: ture of it during the search will be clearer. put Slo-Zap on ribs, spray Zip Kicker on Distinctive coloring is essential. wing sheet, put together, and smooth out w ith palms. It's easy! HOW TO BE PREPARED "1. Carry a binocular or monocular with Prof. Sticky VonShtuck Pacer Tech. Campbell CA you. Get it out before the model lands and hold the impact point while you memorize the sighting point. Some binoculars have a Don's book is entitled (strangely enough). drift just a short distance. After some built-in compass. Take a compass heading Rubber Powered Model Airplanes, and it thought, it occurred to me that most clubs at your standing point. A sighting compass provides 168 pages jam-packed with de­ probably have such a member, and that you is excellent for keeping yourself in line. signs, great drawings, illustrative photo­ could do yours a favor if you bought this is­ " 2 . I'm going to make a lightweight pole graphs, and explanatory text material for sue of Model Builder for him, and high­ ten feet long with a bright balloon on top the beginner and expert alike. If scale lighted the following article. It is priceless and a metal spike on the bottom. When I model building and flying is your thing, "it's information in my opinion. launch the m odel, start the watch, I'll pick in there!" If you are into outdoor competi­ "It's a universal problem. How to find up the pole and go. W h en the model gets tion building and flying, "it's in there!" models in weeds, crops, and other pretty close to the ground, I'll stop and set the pole The publication should be a success, as it green things. It's a good thing I don't have to in the ground, grab my monocular and look is being marketed through one of the larger put out a nickel for every hour I've spent very closely when the model lands. mail order houses, Motor Books Interna­ walking a search pattern in tall weeds, "3. Notice: no hurrying. A good line and tional, P.O. Box 1, Osceola, W l 54020. The grass, or corn. Almost every time that I find one walk on the line is better than a long book sells for $12.95 each plus $3.95 post­ the model search was difficult, was because search, and another and another. . . . age for however many books you get. School two bad habits were exercised: not thor­ "4. If you are in tall corn and are near the programs would really benefit from this text oughly establishing a line on the model and model when it comes down, stop. Deter­ as well as individuals. The local library remembering where the last sighting was mine the direction the model is from where would be a good bet as well. It has a soft made from, and not estimating the distance you are and make a line in the dirt in that cover but a regular binding. I suggest it away from the launch or last walking or bike direction. If other modellers are near, yell highly. Three cheers for Don's success. sighting spot. Here's how. and get them to come to you and go out TO LOSE OR NOT TO LOSE, D O N T M O V E from you in the estimated direction. By Ed Lidgard "1. Stop. . .before the model hits the "5. Trees are another story. Ask Perryman; Recently, I read this article in the Thum b gound. Look beyond it and establish a sight­ he has never had a model in a tree. Carry Print Newsletter (Thermal Thumbers of ing point. Mentally describe it to yourself in long poles that telescope, clim bing irons, a Metro Atlanta, editor: David Mills, 10-D detail. Repeat to yourself. Don't move. Es­ slingshot with heavy lines, polypropylene Pine Circle NE, Atlanta, Georgia 30305). I tablish where you are for reference. Tie a rope and w hen all else fails, an ox. W h e n immediately ran a copy of it and gave it to handkerchief to the tallest nearby object. you are sending up a line, stand under the fellow club member Clarence Bull, who is Determine a reciprocal sighting point so branch you want to pull or shake and send constantly losing his free flights even if they you have a point to walk back to. a weight up so it comes down a slight dis-

74 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER H O T S T U F F "

NON-FUMING NON-FOGGING WONT ATTACK FOAM Bonds Foam FAST with Hot Shot™ and KICK-IT™

Best Industrial Grade INSTANT GLUE Balsa - Spruce - Plywood - Rubber - Plastic - Hardwoods

BO·*, White - Blue - Green - Brown Foams f U i L NO PRIMER NECESSARY

HOT SHOT or KICK-IT Accelerators SPEED CURE

THIN’ 'T H IC K 1 (Red Label) (Green Label) ODORLESS - Penetrating ODORLESS - Ultra Gap Filling CATALOG #"S CATALOG #"S UFO-7 - 20 Gr. UFO-4 - 50 Gr. UFO-7T - 20 Gr. UFO-4T - 50 Gr.

"H O T STUFF"™ · Am erican Instant G lues AT FINER HOBBY SHOPS

P.O. Box 836, Simi, CA 93062 S a tellite C ity (805) 522-0062 “RAINBOW RUNNER: PURE PERFORMANCE”

The Rainbow Runner delivers total pattern performance in .25 and .45 sizes. Designed with all the features of a pattern champion, the Rainbow Runner is ready to meet and exceed all your expectations.

^HMPRtX:iSK)N ■ ■■PRODUCTS INC (714) 592-5144 510 E. Arrow Highway. San Dimas. CA 91773

northwest, the prospect of retrieving mod­ els from trees is everpresent at a couple of MAP Argus Plans & Drawings our flying sites. If a model is trapped in a tree with low branches, a pole usually will Plans Free flight plans-vintage, scale, competition & gliders. do the trick of knocking it out. If the model Handbook U-Control plans-vintage, scale & competition. is caught in high branches, it is much more One R/C aircraft plans-scale, competition, sport & gliders. difficult. W e have had success with a bow and arrow using a very light line tied to Plans Boat plans-sport, power, sail, competition, yachts & steam. them (one end on the arrow, the other end Handbook Car plans. on the bow). The arrow is shot over the Two Plans for steam, petrol & traction engines. Locomotives, branch, and the light line is used to pull up buildings, cannons & clocks. a heavier cord. This cord is then tugged and Plans pulled to shake the model loose. On occa­ Scale drawings of military, civil, private & light aircraft, Handbook sion, a rifle or shotgun is used to blast the Three as well as scale drawings of military vehicles. limb off the tree, and on a couple of occa­ E v e ry type of plan for the scratch builder. All ______sions, we have used a chain saw to cut the catalogs $3.00 each, or all 3 for $7.50. Spec- j ^ LUPPERGER PLANS tree down completely. Although these ify catalog desired, and make your check pay- ’ ' 1 3 0 4 pa|m Avenue methods are successful in the majority of cases, sometimes the model gets to spend ab'e to J M Lupperger Plans California resi- Huntington Beach, CA 92648 dents add 6% tax. Allow 2 -4 wks delivery. some time in the tree. Almost without fail, the model w ill eventually fall down, get blown down or otherwise dislodge itself. Twice, in my own experience, I have been Polyhedral Wing-$41 PP. called by hunters or others walking through Aileron Wing-$46 PP. the woods and finding my model on the A versatile lVb meter wingspan. Foam Wing ground. These are the times that you value Glider Piloted by Paul Wilson, crewed by Rusty having your name, address, phone number Shaw & Leroy Satterlee (Chupersoa's and the words REWARD IF FOUND plas­ designers) to set Class A distance record (6.6 tered on the ship. In both cases the models miles). Eppler 214 or Selig 4061 Wing Airfoil. were returned even if weathered. One ship needed recovering, the other rebuilding. In CALLISTO· both cases, the engines were undamaged. Terry Edmond's famous So, some good model retrieval tips for pair for thermal duration. your Spring flying activities. Thanks, Ed. The lO has superior per­ TIME TO GO FLYING formance for 2 meter Looks like I really got carried away this events. CALLISTO takes month, so it's time to put the old word over from there to processor away for another 30 days. Let's go dominate standard class. flying and catch some thermals. ·

* 2S2C iriiknito·. Oitw'H.II S2001 3U/SI34130 Control Line.. Continued from page 59

tance over the branch and straight down. large nail or sharpen the bottom in some engines about $35. M any contests restrict Having the weight wind around the branch way so it can be poked into the ground as the number to one or two per contestant. loses the line, thank you. If a fifty-pound specified above. I will carry a large, brightly * * * line is not enough, pull up a 1/4-inch poly­ colored cloth (a yard of red or orange silk Now that we know what the events are propylene line and shake harder. If that isn't would be easy to carry and very visible) in like, where do w e start? enough, get help to pull harder. Don't get my pocket, and when I reach the point W ell, you could start with A M A combat. violent. where I need to use a reference, I will ex­ It has been done, but I wouldn't recom­ " 6 . Isn't all of this fun?" tend the antenna and tie the cloth onto its mend it for the following reasons: you will * * * top before I jab it into the ground. The an­ be devoting more expense and workshop These suggestions are really helpful, and tenna I have extends to about six feet, so it time per hour of competition than you I would like to add my two cents' worth to can be seen from a distance. The ability to would with some of the other choices, and two of the items. I like the idea of the light­ collapse it for ease of storage and carrying you will find the flying more frustrating to weight pole mentioned in item 2 above, ex­ are more appealing than carrying a long learn—everything just happens too fast for a cept I intend to make mine from an old pole with me. novice, resulting in a lot of crashing, line telescoping auto antenna. I will braze a Finally, for those of us w ho fly in the tangling, etc. Secondly, a novice flier, state-

76 MODEL BUILDER of-the-art combat equipment and the ex­ citement of a match create a potentially dangerous situation. I'd recommend sneak­ ing up on this event through the others, 1 1 0 1 some of which are designed for just such DIJ-B X N K S training. Ruling out FAI as far too complex and dif­ ficult for all but the most ambitious expert, ARE TOUGH! that leaves us three options: 1/2A, Slow or FoxDoo. In choosing between these three, you really can't go wrong. Let met give you some pros and cons of each. 1/2A: This is the cheapest to get involved in. These planes are the least susceptible to damage. Fly in tall grass and a well-built plane will seem almost indestructible. Be­ cause they are lighter, pull less and are on strong lines, the planes also are somewhat safer for both contest and practice flying. This makes the idea of practicing actual combat flying—outside of contests— practical from a time and expense stand­ point (very few people care to practice non­ contest combat flying with their fast com­ bat planes). The planes are a little tricky to build straight, light and true and can be doggy if not built well. The trick is to find a sturdy, light, good-flying design—and they are available. The engines are a little more cranky than the big ones, particularly in cold weather, but can be mastered. If there's a drawback, it's that the flying skill required is near to that of fast combat. This is offset by the fact that you can practice much more If you’ve ever had a fuel tank split and leak fuel into your with these planes and may learn more fuselage, you know how important it is to install a tank quickly. W h en you begin flying fast com ­ bat, these planes w ill remain useful for you can trust. Du-Bro Products manufactures a complete practice. line of rugged polypropylene tanks in 10 convenient sizes FoxDoo: This event, I believe, is the easi­ 2 oz to 24 oz. All guaranteed for life against splitting, and est to begin in. The planes are incredibly easy to build and build well. The engines leaking or your money back. are cheap and easy to start and run. At 80 mph on 60-foot lines, the planes are slow ■ Each tank comes complete with soft brass tubing and hardware. enough that the average novice (assuming he has modest aerobatic skills) can keep up ■ Protruding front lip prevents fuel lines from being crimped on with them even in a match situation with a hard landings. modest amount of practice. With the re­ strictions on the number of planes, com­ ■ Single or twin vent design. bined with the fairly strong design and slow speeds, it is a low-cost, low-destruction, ■ A gas conversion stopper is available to use your tank for high-payoff event. gasoline. Cat. No. 400. Slow combat: This is the official AMA rulebook training event, and can serve as ■ Visit your local Hobby Shop for all of your fuel such, but it is not as easy as it might look at hook up accessories. first glance. The airplane size restrictions make them larger, more work to build and more expensive. W ith the increased size, the challenge of making them light and good-flying increases; a doggy plane can be a distasteful experience to compete with. When they hit the ground, they tend to break. Suction fuel systems can be a bit mystifying to operate, as opposed to blad­ ders allowed in the other events, which are quite sim ple and reliable. And, in this event, you w ill notice a fair spread in equip­ ment and skill level between the novice and experts. All those things understood, slow combat can be a good training ground be­ cause the planes are slow enough to keep track of. The engines are transferable to fast combat when you desire to move up. You can see by my remarks that I favor DU-BRO PRODUCTS, INC. FoxDoo or 1/2A as a beginning event, with 480 Bonner Road · Wauconda, IL 60084 slow combat as a viable alternative. I think fast combat and FAI should be left for later,

MAY 1989 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 77 necessary. When in doubt, check the win­ ner's planes. Some of the experts use planes CONGRATULATIONS that weigh no more than 18 oz. including Fox Combat Special engine, but up to 22 1987 NAT’S WINNERS ounces is acceptable if the design is right. 1 s t P la c e In regard to any of the events, when exam­ MASTERS - JIM EIDE ining the airplane options, watch them in EXPERT - GENE MAXWELL flight before deciding what to build. Don't just look for how fast the plane is and how SPORTSMAN - GENE RODGERS sharp it turns. The following factors are equally important: AGAIN - OUR THANKS • Does it stay tight on the lines? Many of TO ALL THE the most spectacular turning planes are a bit loose on tension, leading to periods of “TIPO” FLYERS vague control and sometimes even crashes T H IS Y E A R ! or flyaways. Remember, scoring is not based on how well a plane turns, but on how well the pilot can control it to score cuts and kills! Some key factors in line tension are like rake (where the leadouts exit the wing- tip), wing leading edge taper, wingtip weight, elevator travel and moments (dis­ tances between the balance point and the r , u ( \ prop and elevator). A )— Now available: TIPO • Does it fly well out of the launch? A T IP O 750, H IP P O T IP O (825), Write or call for full information. plane that's hard to control on launch is a tipoff to poor stability and line tension. Key DICK HANSON MODELS ALL SHIPPING VIA UPS factors include tip weight, line rake, leading AVAILABLE DIRECT FROM 5269 LUCKY CLOVER LANE UPS CHARGES EXTRA edge taper and balance. MURRAY UTAH 84128 PHONE 1801) 261-1402 • Can it be flown level without bobbing around, and still turn quickly? If it's hard to fly level, it's tailheavy, indicating that the design moments may be inherently incor­ rect. A good combat plane is stable in eyes- off level flight but turns quickly when con­ AW trol input is applied. Key factors include COLLEGE OF GLUE KNOWLEDGE balance, moment arms, size of elevator, ele­ vator travel, control linkages and airfoil shape. Poly Zap • Does it hold its speed through consecu­ Glues and repairs Lexan, glues canopies tive turns, or does it slow down and start to w ithout fogging, and glues space age plas­ wallow? This is a tipoff to nose-heaviness or tics and nylons.Doesn't fog parts if glue is incorrect moments requiring too much ele­ applied in a film. Kicker may be used but sparingly. Extremely strong. Repairs EZ vator travel to induce turning, the opposite kits, too. of the instability problem mentioned above. Key factors include moments, airfoil shape, elevator size and travel. Prof. Sticky VonShtuck Pacer Tech, Campbell CA • D oes it fly w ell upw ind? M any a promising combat design has been scuttled by its inability to use the whole circle. Key when you have built skills in the others. U l­ will be easy to build and, if light and factors include line rake, airfoil, w ing taper. timately, however, I think that most fliers straight, w ill fly well. However, a good balsa • H ow fast is it? Airfoil shape and wing w ill find fast combat the ultimate challenge design (such as the Cheap Imitation pub­ planform can make great differences in the and the most fun and rewarding in the long lished by Mike Hazel in this column a cou­ straight-ahead speed of a plane and its abil­ run. ple of years ago) will be an excellent choice ity to keep up its speed through turns. Bear * * * for sturdiness and good flying. Weight is in mind that, fora beginning flier, the fastest Once you have selected an event, what critical. Look for a design with a one-piece plane may not be best; you are searching for next? plywood motor mount, a one-piece a plane that you can co n tro l and fly com bat I would like to repeat something I've writ­ fuselage, a one-piece stabilator, and a maxi­ with, not win races! For beginners in AMA ten here before: Find and attach yourself to mum weight, including Cox TeeDee .051 or combat, for example, I have promoted the an expert flier, and watch and listen. His .049 engine, of 5-1/2 ounces. Undertaker, my design which was pub­ help w ill be invaluable. C o to as many con­ Slo w : look fora simple design with as few lished in Model Aviation, as a plane with all tests as you can and learn as much from the pieces as possible. Foam makes for good the right handling characteristics but an air­ people already competing as possible. And flying wing planforms but balsa makes foil that holds the speeds within a novice's practice—both at your local field on week­ good, light, strong planes. Search out a ability level. My own competition airplane ends and at as many contests as possible. If good tank for your engine, such as a Vir­ at present is basically the same design with you have the time and money, fly in several ginia Craftsman chicken-hopper tank. Tank a different wing planform, Gene Pape's Un­ categories for a while, just to get lots of fly­ is about 80 percent of good engine runs in derdog, a plane that adds speed to the ing in. this event. Try for a maximum weight of 25 equation while still passing all the above I won't say much about designs other oz., including Fox Combat Special engine. tests. In addition, a rather plodding builder than to suggest that you examine what oth­ A M A: W h e n you get there, look for these can crank either design out in 4 to 4-1/2 ers in your area are using (except in Fox- features in a design: double-tapered foam hours per plane. Doo, where all planes are the same). There wing, one-piece fuselage, simple motor * * * are a multitude of good designs to choose mount design, and one-piece stabilator By now you may have selected an event to from. A few guidelines to look for: with simple hinge. Many fast combat de­ start in and picked out your airplane design V2A: A small tapered foam wing plane signs are just plain more complex than and engine type. How do we translate those

78 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER INTRODUCING THE FIRST CONLEY PRODUCTION k-STRO KE

w e re talking

DOHC 4 - V a v e

Just like "Cosworth", "BM W", even "Maseratti"! We're talking DUAL CVER HEAD CAM, k VALVES PER CYLINDER. 1.2 CUBIC INCH. WORLD CLASS POWER­ HOUSE. HIGH TECH DESIGN. BEYOND STATE-OF-THE-ART PRODUCTION. We heard. We waited. And now we're talking CONLEY!

Head boasts double intake and exhaust valves

Suggested Retail Price $26995 Dealer Direct Inquiries Invited

From famed quarter scale V-8 utilizing the race-proven Cup and increases engine power and engine builder Gary Conley, Disk system of valve adjustment. efficiency. comes the first in a series of high This eliminates less efficient Conley precision engines are performance, precision built pushrods and rocker arms that are made in the U.S.A. utilizing only model engines. Designed to be a forever in need of adjustment. In standard SAE threads and are powerful, durable and low addition to this high tech valve available factory direct or through maintenance model aircraft train, paired hardened and ground select dealers nationwide. engine, the new Conley 1.2 has steel intake and exhaust valves If we're talking high perform­ features you'd expect to find only add better breathing and work in ance, and American, and great on European supercars. Like belt- unison with a hard chrome R/C model engines, then driven dual overhead cams cylinder that reduces weight and WE'RE TALKING CONLEY.

"World Class Performance - - Made in the U.S.A."

820 Ridge Avenue Suite G Dept B Lombard. Illinois 60148 (312) 953-8882 the wire through some sort of device such as a model railroad transformer or, the sim­ LAST... plest method, a series of light bulbs wired A Free Flight Model into the circuit to step the power down (ad­ Retrieval System that just the wattage of the bulbs to adjust the works . . . EVERY TIM E heat of the wire). Expect to use up a lot of An ultra light weight, long range foam as you learn the process; once you miniature transmitter combined with a master it, there w ill be little waste. I cut my hig h ly sensitive receiver and directional wings, core out the centers and cut the spar antenna will quickly help you track and notches, all using the hot wire. Look for locate your plane. more details in a future column. NEVER LOSE ANOTHER MODEL! For adhesives, you should use a slow-cure Send SASE For Brochure epoxy on motor mounts and bellcrank mounts, white glue or 5-minute epoxy tor Jim W alston bonding foam to fuselages and spars, and Retrieval Systems cyanoacrylate for non-stressed parts. 725 Cooper Lake Rd. S.E. In finishing, even though you may not Smyrna, G A 30080 choose to decorate the planes to be pretty, 404/434-4905 you should use sandpaper to make sure they are smooth and clean, to minimize A-J "CLASSIC" 3-PAK... drag. Most combat fliers use plastic cover­ o A-J HORNET ing for wings (FasCal is the most common) o "404” INTERCEPTOR }$19.95 MULTIPLEX MODELTECHNIK and epoxy glue or epoxy paint for wood o "74" GLIDER parts. In my own planes, I use FasCal for Gmbh of West Germany offers to you: (Each is ready to fly) wings and elevators, colored low-tempera­ —True narrow-band conversion technology ture covering (Solarfilm, Econokote, Quick- —The finest equipment Note Please add $3 00 tor postage and handling on first 3 cote, etc.) for tips and fuselages, and epoxy packaged models Add 10% oi pnce lor each additional — Competitively priced for motor mounts. — Beemer-Multiptex VIP Service oooooooooooooooooooooooo A few general construction tips: (The best) Your design and control system should — Full stock of accessories and parts work together in such a way that a large ele­ f a t f r i c a f i j u r i 0 1 '™ Send $5.00 for new catalog in English vator has a relatively small amount of travel AIRCRAFT COMPANY or call us: (602) 483-9577 for the amount of arm movement by the pi­ P.O.Box 68132 lot. This com bination results in a plane that PORTLAND, OR 97268 is stable and easy to fly eyes-off, but turns B E E M E R R/C W E S T D IST R IBU T O R S INC. quickly. I use planes with 3 by 12 inch rec­ 7725 E. Redfield Rd.. Suite 102 tangular elevators, Fox bellcranks with the Scottsdale, Arizona 85260 leadouts in the outer holes, the pushrod in decisions into combat planes and flying? the inner hole, extra-tall elevator horns with Let's begin in the workshop. the pushrods near the top, and EZ-just Hot The usual rules of good construction Rock handles (4-inch line spacing). practices apply. You must build your planes Safety is another factor that must be con­ Bicycle spokes, available cheap at your straight and pay attention to weight. Com ­ sidered. Your motor mount must be abso­ local bike shop, make excellent pushrods, bat planes, by their disposable nature, may lutely secure, and for good measure many because they have a keeper already on one appear on the flying field to be a bit pilots are now attaching a wire from the end. Solder the threaded kwik-link end of a crude. . .undecorated and lacking the spit bellcrank mount to the engine to prevent 4-40 pushrod (available in the R/C section and polish of stunt planes. If they've been parts from flying off through structural of your hobby shop) to the elevator end of flown and repaired a lot, the acquire a tat­ failure or collision. the spoke to provide an adjustable linkage. tered look. Do not be deceived— the impor­ As you begin construction, you will want D o not use sm aller than 4-40 kwik links. tant factors must be attended to: weight, to come up with methods of assuring align­ Use blind nuts for your motor mounts to alignment, drag, strength, etc. The last ment. Use of a drill press, squares, rulers save engine-changing time (you may have item, strength, is tremendously important, and triangles, jigs and weights to hold parts to change in a match) and cut the bolts off particularly as you move into the faster in place, etc., are invaluable aids to check­ flush to reduce drag. classes. Most combat fliers use space-age ing alignment. Your local expert can show Bush your leadouts at the bellcrank by materials such as carbon fiber to add you some of his clever tricks. sheathing them with small brass tubing strength without excess weight. Cyanoacry­ If you are serious about combat, you will where the leadouts go though the bellcrank lates, epoxies and white glues are the adhe­ soon want to learn methods of construction holes, to prevent sawing the leadouts off. sives of choice, depending on the material. using foam. Some good foam airplane kits Use Sullivan C-D leadouts. With the high rpms turned by the engines are available from such manufacturers as Combat planes generally should balance and the wild flying, the structure must be the Core House and Dox Generix, but you at about 25 percent of the chord behind the strong enough to withstand both extreme eventually will want to cut your own. I hope leading edge of the wing, which in most de­ twisting forces and vibration. to devote a future column to foam cutting, signs is approximately on the spars. A Take your time with your early construc­ but for now, you may want to research the balancing tip: Build your first plane of any tion efforts to make sure that you pay atten­ magazines for some tips. I recommend particular design with the motor mount tion to the above details. W ith modern con­ Gene Pape's Model Aviation article on the finished last. Rubber-band the engine onto struction and finishing techniques, FAWF several years ago as a good foam­ the mount and temporarily attach it. Move building a plane with proper alignment is cutting primer. the engine back and forth until the plane is not too difficult. Foam wings and plastic For now, I'll just give this quick descrip­ balanced properly, and then drill the mount coverings make after-construction adjust­ tion of the foam-cutting process: holes. It it comes out right, you can base ments for warps feasible, but such things as Foam is cut with a hot wire, running other planes on this one. elevator alignment must be handled in the around templates of a hard material such as For power, I recommend starting with the construction stage. Lest you think such mat­ formica, plywood or aluminum. The wire stock engines available at reasonable ters are unimportant, ponder for a moment can be held in place by various methods, prices. D o not try to rework an engine if you the spectacle of a 120-mph combat plane with tension adjusted by springs or other don't know what you're doing. You are coming to visit you in the pilot's circle be­ methods to a degree determined by experi­ searching for reliability as you begin; re­ cause of the warp you built into it! mentation. Electrical current is applied to working comes later, once you've had the

80 MODEL BUILDER chance to learn from an expert how to do it. M any new fliers take good engines and ruin Invisible Svitch™ them by trying to hop them up without (direct replacement for your radio on/off switch) knowing how. For fast or slow combat, use '“e ----■ the Fox Com bat Special .36 engine, availa­ MIRRORS ble direct from the factory for $80. Earlier versions, the M k III and M k IV, are often available from local fliers much cheaper, Und Ve Call It “Der Svitch””* and they still are excellent and competitive “ D er Svitch""* is an on-board magnetic on/off switch for your radio equipment that engines. For 1/2A, use Cox Tee Dee en­ hides inside your fuselage. It is activated from outside with the included small bar gines, available at any hobby shop. FoxDoo magnet (shown above). W hy cut those awful holes in your fuselage... Isn’t it time you uses standard Fox .35 stunt engines, availa­ made “ Der Svitch” ? ble from the factory or most hobby shops. Ideal for For FAI, dig deep in your pockets and buy • Any R/C Plane. Boat or Car · Scale Projects · Water Flyers the Nelson .15 from Kustom Kraftsmanship (nobody said being a world champion Safe to use: would be cheap!). • Consumes no power · Vibration free · Crash resistant · Compatible with your radio • Optional red LED lamp installs on your plane, dash or wing to indicate “radio on” state Leam and practice the use of bladder fuel systems, which almost any current combat Simple to Install: For Futaba and Airtronics radios, order Model 1402 and simply unplug your on/off switch and plug in flier can help you with. This is another topic “ Der Svitch" or order Model 1401 and use the connectors from your old on/off switch (instructions for a future colum n. supplied) Each “ D er Svitch " includes a bar magnet activator as shown above. Study different propellers for your partic­ Model Description Price, e a ular event; see what people are using at 1401 “ Der Svitch”, with activator, no connectors, twisted leads S 19.95 ea contests near you. Starting out, try these MOILED “ Der Svitch”, with activator, no connectors, twisted leads, props: with option leads for external LED # 1405 $24.95 ea 1402* “ Der Svitch”, with activator, with connectors for Futaba or 1/2A: Top Flite 5-1/4x3 or 5-1/4x4, Tornado Airtronics $24.95 ea 5x4 or 54/2x3, etc. 1402LED* “Der Svitch”, with activator, with connectors for Futaba or Slow: Zinger 9x6, Rev-Up 9x6, Taipan Airtronics and option leads for external LED * 1405* $2995 ea 1405 LED red lamp w/24" twisted leads for Models 9x6, etc. 1401 LED and 1402LED $8 95 ea A M A : Top Flite 84/2x6-1/2 pylon racing * II ordering Model 1402 or 1402LED, please specify your radio and connector types. Connectors are prop cut to 8 inches. only available for Futaba ''J“. Futaba “G " and Airtronics radios. FoxDoo: Top Flite 9x6 or 10x6, Rev-Up To o rd e r include your nam e and address, sp ecify m odeKs) need ed, include c h e ck or m oney order and 9x6, Tornado 9x6, Zinger 9x6. send to Ragan/Barker Group. 5050 Quorum Drive, Suite 741, Dallas, Texas 75240 Please add $2.50 per * * * order to cover U P S. charges Texas residents add sales tax. Credit Card orders call between 9:00 and O nce you've built your planes, it's time to 5:00 Central Time. M-F Please allow 2-4 weeks for delivery. start flying combat. Patent Pending. Dealer Inquiries Invited First of all, you need to practice to de­ Order “ D er Svitch " toll free 1-800-336-0602. In Texas dial 214-991-1876. velop the ability to start your engine quickly on signal. This means.you have to learn to CUS. If you aren't paying attention to busi­ prepare it for instant start (fueling, priming, CUSTOM ness now, kiss your streamer goodbye. warming, etc.). USTOM MODEL Secondly, you need to fly the planes a lot, You must see the other airplane when the RAFTORS BUILDERS first to get them trimmed out (equalizing up horn is blown to start combat, and you must and down turning through kwik-link adjust­ keep track of it in those first few seconds un­ ment, adjusting elevator travel for optimum til the planes are together flying combat. maneuverability without stalling by moving You must never after that let it out of your the kwik link up or down the elevator horn, sight. adjusting for warps by shrinking the cover­ In order to see the other plane at the start, ing to twist the wing or bending trim adjust­ you must be looking at the opposing plane, PLANES CARS / / KITS BOATS TRAINS / ,r0ra / PLANS ments into the foam trailing edges, etc.), not your own, during the two pre-combat 40+ years’ experience · Special machined pans available. and secondly to get familiar with how they laps. This is not as easy as it seems, because work. You should try to set up the planes so there's usually a speed difference. If the INTRODUCTORY SPECIAL: that they all fly exactly the same—you want other plane is faster, it may move around out SIGKADETII Complete Less engine/radio S247.50 to be able to fly them without looking at of your sight as the horn is blown (officials them in a match, so you have to know how are not always precise at blowing the horn Send SASE for particulars to: they are reacting to your control inputs. when the planes are 180 degrees apart as yw* USTOM Suite 200 2069 Zumbchl Rd. Si. Charles, MO 6330} Now, I'd like to puncture one of the the rulebook says). H ow do you keep it in , C\ RAFTORS (314)946-7154 thoughts that's in the mind of most new sight? By varying the height of your own combat fliers: strategy. plane. Other plane creeping ahead? Fly Listen, fliers, there is only one strategy higher; you'll equalize the rotational speed. odds of a quick encounter are in the oppo­ that works, especially for beginners: Cut the If he's falling behind, fly lower to equalize nent's favor. If you jum p right on him and string (or, if there's no kill, cut the streamer), rotation. collide, you lose, so you have only a one-in- if you make it any more complicated than The horn has blown—what do you do? three chance of a quick win. that, you'll have lost before you get a chance Should you scream over and attack his After that first encounter, what I said at to try your tricky moves. The best defense is string or wait and react to his first move? The the outset applies, be aggressive and don't a good offense. If you are chasing the other answer lies in w ho got into the air first. distract yourself by thinking about strategy. guy, he can't chase you. If you try to hide, If you got up first, you can be as aggres­ Try to get the other guy's streamer and don't he'll find you. sive as you want. G o for the kill or cut right keep doing the same thing over and over OK, you insist on being told some away, begin jockeying, or wait; it's your again. That's all there is to it. strategy. A ll right. I'll contradict myself and choice. If you jump right on him and get it, Is there ever a tim e to play defense? give you just a little: It applies to the first few you w in (or lead, if there's no kill). If you In any event with a kill, no. You w ill rob seconds of the match. After that, you're on collide, you win on airtim e. If you miss and yourself of a chance to score the kill and the your own. I believe this is the only strategic give him your streamer, well, you gambled other guy w ill still be hunting you. In a 5- information you need to know at this point. and lost, but the odds were 2-1 in your favor. minute match, he'll get you no matter how The most important period in a combat If you were the second plane up, a more well you hide. match is the start. Flere is the key word: FO- cautious approach is advisable because the In an event with no kill, maybe. If you

MAY 1989 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 81 Consecutive maneuvers of any kind are dangerous anyway because they set up a pattern opponents can pick up on. Learn to avoid them. In the pits, preparation and practice is im­ portant. What about equipment? You should take to the pits a "pit box" that con­ tains your fuel, battery, tools, spare plugs, bladders and props, hand protector, some Alloy Aluminum Drilled 8 Tapped TWO CYCLE GIANT SCALE repair materials (cyanoacrylate glue, kicker, Machined Beams 90* Thrust Line Machined Beams Alloy Aluminum foam primer), and a spare engine. You don't o.s. ENYA Engi e Mounting Machined Beams want to take any more than you might con­ FS-20 $ 7 5 0 35/40-4C $ 8 9 5 Bolts Incl. Engine Mounting ceivably need, because it will get in your FS-40/40S 8.95 46-4C 8.95 Screws Incl. way when you're looking for what you do FS-48 9.95 60/80/90/ V t A Sh Bm $3.90 need. (You'll never need epoxy in a 5- FS-60/75/90 12.95 120-4C 12 9 5 ' h A Lg Bm 4.10 OS Max 90 $19.25 minute match! Don't take six spare props, FS-61 12.95 R 120-4C 21.50 .09 4 7 5 O S Max 1 0 8 19.95 FS-120/120S19.95 15LgBm 4.95 Super Tigre-2000. one or two is enough.) Spend a few hours SAITO 19-3.5CC 5 85 2500 & 3000 19 95 building a box that is logically organized so HP FA 40/45 $8.95 29 .40 Lg Bm 6 80 ZenoahG-38 19.95 that you can reach right to the tool you .40-61 Sh Bm 6 50 Quadra VT-21 $7 50 FA 65 12.95 need. This also helps in packing to make VT-49 8 9 5 FA 120 19.95 .40 RV Pylon 7.75 35/40 21.50 60 Pattern 10.25 sure that you have everything. M y own box WEBRA Undrilled includes the following: Syringes, bladders, T4-40 $ 8 9 5 6 0 - 9 0 $1 1 2 5 plugs, props, hand protector, Hot Stuff, T4-60/80 12.95 c .B. TATONE, INC. kicker, foam primer, baking soda (for repairs II not available from your hobby shop. ORDER with Hot Stuff), w ire cutter, pliers, screw­ DIRECT Check. MO. VISA. MC or COD accep­ ted Add $2 SO tor S&H. 2 00 lor COD Caiiior- 2 1 8 5 8 C I o u d W i y · H a y w a r d , C A 9 4 5 4 5 driver, hemostat for pinching tubing, nia residents add 6W% sales tax. In CA 4 1 5 -7 8 3 *4 8 6 8 · Out CA 8 0 0 -4 8 2 -8 6 6 3 plug/prop wrench, No. 4 and 6 hex wrenches (for engine and motor mount screws), spare needle valve, spare fuel filter, battery, electrical ties (for bladders and tub­ turn yoir printer Into an airfoil plotter with. ing), and spare prop nut, washer and thrust FOILED AGAIN!! washer. All of these are in their own slots MERCO and displayed for easy access. Nothing is hidden away in drawers, cans, or boxes. Com bat is a very intense activity, but one • PLOT AIRFOILS IN ANY CHORD TO 24 INCHES* characterized by sportsmanship among the MERCO C/L & R/C ENGINES • MODIFY THICKNESS, CAMBER. TRAILING EDGE competitors. They all help one another, • PLOT SKIN THICKNESS FOR SHEETED WINGS • ENTER DATA EASILY WITH BUILT-IN EDITOR SEND S2.00 FOR CATALOG with sharing of equipment, knowledge, pit­ • EASY TO USE, MENU-DRIVEN OPERATION CLASSIC REPLICA CL PLANS ting help, etc. A new flier can make friends • INCLUDES AN 18-PAGE ILLUSTRATED MANUAL quickly by observing these unwritten rules • IBM ««ralon only BOLLY COMPOSITE PROPS of sportsmanship: CO Q QC CA roaldanl· MERCO PARTS&SERVICE < > 0 7 . 7 9 add « X la· • Be polite and understanding of judges, Ovaraaaa ordara: bank d rift for U StSO even when there's a question or dispute. Require» IBM-compatible computer and dot-matriv printer They have a tougher job than you do as a flier and they are unpaid volunteers. Pleaaa epeclfy computer and ^ T 1’ Tom Dixon printer type «hen ordering. • Be friendly to your opponent. Cooper­ 1938 Peachtree Road Suite 401 CYGNET Softwa're° ate by clearing tangles at the appropriate 24843 Del Prado #141 Dana Point CA 92629 Atlanta. Georgia 30309 times and trying to avoid them in the first place. Use courtesy in and out of the circle. Don't kick, gouge and wrestle in the center. got in, adjust your maneuvering to fly back Get out of the way when you are down, etc. HI-PERFORMANCE out (if you cam e in with an inside turn, fly Don't deliberately tangle or collide, even if outside turns). But never, never forget that it's to your advantage. FOLD NG PROPS the object is to cut the other guy's streamer. • Don't accept cheap wins. It's not writ­ If you start worrying about the tangle, you're ten anywhere, but you’ll build respect | Send SSAE lor catalog sheet on our complete line | going to give your streamer away and lose among your peers by com ing back up to fly K and W ENTERPRISES, INC. the match. Rule #1 of tangles: Fly combat when you've got the match won if you stay 7824 Lexington An., Philadelphia, PA 19152 first, and clear the tangle if it's convenient. If down (OK, maybe not at the Nats, but cer­ the match is decided, then you can, by talk­ tainly in local contests!). If there's a ques­ build up a substantial lead and think you ing with the opponent, work together to tionable call by the judges that awards you a are a good enough flier to keep away, you clear the tangle. If the other guy starts to match you didn't deserve, agree to a might try playing defense, particularly if the chatter about the tangle while the match is rematch. opponent doesn't have much streamer left still going on, don't let it distract you! (Ex­ • Treat other fliers, crews and judges as to shoot at. Because you aren't subject to a ception: If the tangle is so serious as to you'd like to be treated yourself. You'll enjoy kill, you may be able to preserve your lead threaten lines parting and be a safety con­ the hobby and so w ill your fellow fliers. without as much risk of a kill. If you must cern, go ahead and work on the tangle.) This information should get you started. play defense, keep the other plane in sight. When clearing a tangle, don't tug on the Now get in the shop and build and get out If you just run away without watching, he'll lines. If one plane is down, the down pilot there and practice. I'll see you in the center pop up somewhere unexpected and get should work to clear the lines. Pit crews circle! you. The best way to hide is to stay behind should stay out of the circle until the tangle Next month we'll return to the mailbag, the other guy. Run away and come up be­ is clear, and should not pull on the downed as we have a number of interesting bits of hind him. As long as you're behind him, plane. You can avoid tangles in the first correspondence to share. As always, ques­ you're safe. place by being aware of the way they occur. tions, photos and comments are welcome. Som e other tips: Avoid consecutive loops around the other Note my new address: John Thompson, W h at do you do in a line tangle? Answer: plane, and if you do them, remember 1520 Anthony Ave., Cottage Grove, Oregon Fly combat! If you can remember how you which way they went and reverse them. 97424. ·

82 WHEN CONTACTING ADVERTISERS, TELL ΈΜ MODEL BUILDER SENT YOU! MODEL BUILDER ELECTRIC POWERED AIRPLANE KITS

THE ASTRO SPORT Our popular PARTENAVIA P-68 kit has been comnplete- The Astro Sport is a cute little high wing sport trainer that ly redesigned for the Astro Cobalt 05 Motor. The airfoil sec­ is specially designed for schoolyard fun. Install the Astro tion has been changed to the Eppler-195 for improved Cobalt 020 M otor and you have a gentle and forgiving trainer aerobatic performance. The P-68 has always been a popular that is very easy to fly. Install the more powerful Astro Cobalt model at our electric contests, and in fact an Astro Cobalt 05 035 and it becomes a real schoolyard show-off doing snappy powered P-68 won first place in aerobatics at the 87 EA A rolls, loops, and other schoolyard maneuvers. The kit contains Electric Championships. The deluxe kit features all machine all machine cut and sanded parts and is super easy to build. cut and sanded balsa parts. Wing Span 50 inches, Wing Area Wing Span 37 inches; Wing Area 292 sq. in.; Eppler-195, 400 Sq.In., Flying weight 4.5 lbs. Flying Weight 22 to 28 ounces. Kit # 1019...... $ 39.95 Kit # 1013...... $89.95

THE ASTRO CHALLENGER NATS WINNER THE PORTERFIELD COLLEGIATE Bob Boucher’s Astro Challenger won the 84 Reno Nats its The Porterfield Collegiate makes a great sport scale electric first time out and has been winning electric sailplane contests model. It’s gentle and forgiving nature make it perfect for all over the country ever since. Powered by an Astro Cobalt beginners, but at the same time it can be quite responsive in 05 Geared Motor turning a 12 inch folding propeller, the skilled hands. The large wing and light wing loading lets the Challenger climbs almost out of sight in 45 seconds, and can Porterfield climb steeply to and land short. Just what you need repeat this climb three or four times on a single battery for flying in your neighborhood park or schoolyard. Beginners charge. The distinctive wing planform with elliptical tips max­ to R/C should install the Astro Cobalt 15 Geared Motor. imizes aerodynamic efficiency and minimizes tip stalls. It’s More experienced flyers can install the Astro Cobalt 25 gentle and forgiving nature make it perfect for beginners too. geared motor for very realistic scale like maneuvers. Wing Kit features all machine cut and sanded balsa parts. Wing Span 69.5 inches, Wing Area 690 sq inches, Airfoil Eppler Span 72 inches, Wing Area 612 sq.inches, Airfoil Eppler 193 193, Flying Weight 4 to 5 lbs. Flying weight 39 ounces. Kit#1020...... $ 49.95 Kit # 1018 ______$ 79.95

RSTRO FLIGHT inc 13311 BEACH AVE. · MARINA DEL REY, CA 90292 · PHONE (213) 821-6242 comparison, a fairly conventional configu­ EIGHTH LARRY JOLLY KITS ration, except that I feel the same way about Λ buoyancy aft of the main step on flying boat Now In Stock hulls as I do about buoyancy aft of the step Pantera 100" span on twin floats. The flying boat hull we will Great Contest P la n e ...... 119.95 be talking about w ill stop at the step, so the UNITED STATES Cheetah 112" span aft end of the fuselage will hydrostatically INDOOR Aileron Contest P lane ...... 164.95 keep the tail just out of the water and allow CHAMPIONSHIPS Meteor 128" span us to use a tail water rudder. Incidentally, Open Class Contest P lane...... 139.95 this aft-fuselage-acting-as-tailfloat doesn't have to have a "planing bottom." Like a tail­ Flinger 59” Span dragger landplane, the high thrust line and SPONSOR A great hand launch p la n e ...... 34.95 the low hydrodynamic drag line, plus stab NFFS CA Res add 7% Tax · Plus S3.95 S&H lift, w ill raise the tail at quite low speeds. So Complete Catalog $3.00 a conventional fuselage w ill do just fine, as » Thermal « Slope » Scale » Electric » long as it is sealed and w ill float. W e do AMERICAN SAILPLANE DESIGNS need to have a fairly deep section at the rear 2626 CORONADO AV. NO. 89 of the fuselage to keep the stab out of the JUNE 1-4,1989 SAN DIEGO. CALIFORNIA 92IS4 waves, or we can use a T-tail or semi T-tail. So much for the ground rules. Floatplane or flying boat? It would be difficult, time 116 FOOT DOME "Geodetic GALAXIE" consuming, expensive, and perhaps incon­ COMPETITION clusive to try to determine which is best by FREE FLIGHT! EAST TENNESSEE STATE comparative tests, but I think we can deter­ UNIVERSITY mine it by logic, with reasonable accuracy. JOHNSON CITY, TN If we assume that our floatplane and our flying boat will weigh the same (not a 21 GREAT EVENTS! strictly valid assumption), then we must (SOME UNOFFICAL EVENTS TOO!) plan for the same amount of static designed by: buoyancy in either case. In the case of the BEAUTIFUL & SCENIC AREA OF TN. V ic Cunnynghsm. flying boat that buoyancy is mostly under SENDSASETO: the balance point of the hull, which is an 1/2 A (312 Sq. in.) 2 4 .9 5 USIC A-B (585 Sq. in.) 3 7 .9 5 extension of the fuselage. In the floatplane the main buoyancy is split in two and 1655 REVERE DR. CONTROL LINE CLASSICS BROOKFIELD, Wl 53005 POW WOW (Bob Palmer) 5 9 .9 5 spread out for lateral balance. W e have to ORIENTAL (Dee R ice) 5 9 .9 5 add a little more buoyancy to each float V J w hen w e make that split, to assure that one GALAXIE MODEL COMPANY float doesn't sink in a crosswind or in a turn. BOX 4B42 COVINA. CA 91723 The extra we have to add may be about the Tech. S tu ff... Continued from page 33 same as the extra buoyancy we have to add floats substituted for the wheels. The aft end on a flying boat for w ing floats, so let's call of the fuselage is usually not designed for rugged, better looking, and/or has lower that trade a draw. buoyancy or even to get wet. The floats drag or is better performing in the air or on Speaking of wing floats, look at the photo must hold the tail, as well as everything the water. W e will never agree on an order of my world endurance record attempt else, well clear of the water. Twin floats do or importance for these factors, so let's just seaplane. On this model, because of the that, with the disadvantages we have dis­ say the configuration with the most of these high wing, I chose to mount the stabilizing cussed. But we are interested in m odel air­ goodies wins. floats on the fuselage instead of the wing. planes, and unless we are building scale, W h at is the configuration of the best fly­ They worked fine, but I didn't know we need not be concerned with how the ing boat we could design? I think it may be whether to call them fuselage-mounted big boys do it. If it makes more sense for us one where as much as possible of the flota­ "wing" floats or strut-mounted sponsons. to design and build taildragger seaplanes, tion is furnished by parts of the airplane that No, it didn't establish an o fficia l record; it we should do it. have to be there anyway. W h y carry extra crashed during the official flight due to ra­ Let me call your attention to the fact that flotation if the fuselage is more than dio failure, but in a test flight it flew for 2 -1/2 we have just conducted a design trade study enough to float the airplane, and why hours and only used half of its fuel. At that on the question of two floats versus three. A bother with wing floats if the sealed wing it­ time the world record was an hour and ten brief, simple, and non-quantitative effort to self will keep the plane from tipping over minutes. Ah well, back to our trade study. be sure, but we conducted a trade study by sideways? The answer is that trying to make By the nature of the beast, a floatplane examining the pros and cons and arrived at such structures multipurpose isn't easy and must have struts to connect the floats to the some conclusions (at least I did). the results are usually far from optimum for airplane. W ing floats on flying boats may be FLYING BOATS either the aerodynam ic or the hydro- attached directly to a low w ing or strut I have designed and built about fifteen dynamic requirements. I've designed and mounted to a higher wing. Wing float model seaplanes in the past 50 years, all of built several flying boats where I tried to use struts, if any, are small, light, and simple them different. About ha, of them were the bottom of a low wing for flotation. The compared to the structural strut system re­ floatplanes and half were flying boats, al­ results varied from wouldn't work to un­ quired to mount floatplane floats. Herein though some were so weird they hardly fit satisfactory. Not to say that it can't be done; resides my case. The strut system unique to either category. All of them had disadvan­ several full-scale flying boats do it to a floatplanes is heavy, hard to design and tages, since I was usually stepping out into degree, and my friend Paul Weston has build, expensive, subject to damage, hard uncharted waters in one or more respects. been the most successful of any model to maintain and repair, and has more drag I finally asked myself the question, designer I know in using the wing for flota­ than anything com parable on a flying boat. "W h ic h are better, floatplanes or flying tion. Have a look at the photo of Paul's "Sea Furthermore, spray from twin floats is often boats?" Let us try to apply the logic for Era." It gets off the water right now, and does thrown toward the propeller, and waves which we humans are noted and find out, it fly! Am ong other things, it is famous for its have free access to the propeller. On a while we are still in the trade-study mood. Lomcevaks. But this is a difficult special single-engine flying boat, the hull bow First we must settle on a definition of "bet­ seaplane design, and we won't get into it wave is thrown clear of the prop on both ter." To me an R/C seaplane is better if it is here. sides, and the hull tends to shield the prop lighter, cheaper, easier to build, more W e w ill take as our flying boat basis of from other waves. 'Nuff said. Our second

84 MODEL BUILDER trade study is complete. Flying boats are better. W rite and present your case if you disagree. Also, in my opinion, flying boats are bet­ SPORTSMAN/ ter looking than strut-laden floatplanes. There is a saying in design circles that if it looks good it probably is good, and vice N O V I C E versa, but beauty is in the eye of the be­ holder. I once competed nationally with an original-design R/C sailboat with a rigid sail F 3 E C O N T E S T that looked a lot like an airplane wing (thirty-five years before Stars and Stripes $2000.00 CASH PURSE ON PRIZES won the Americas' Cup with a wing sail). Some people thought I had a beautiful boat, but some old time sailors thought it was ugly because "it doesn't look like a sail­ boat." To me it was beautiful because it was highly functional. Next month we are going to design an R/C flying boat in this column, and separately present a construction article on building said model. Until then, designing logically is more important than designing technically. Francis Reynolds, 3060 W. Lake Sam­ mamish Parkway N., Redmond, WA 98052. CASH PRIZES: $ ,000.00 1st place (206)885-2647. · 600.00 2nd place 250.00 3rd place Electronics... .C o n tin u e d fro m page 74 150.00 4th place know the resistance of the plug, and we Contest held in Costa Mesa, California should be able to read that with an ohm- meter, right? Wrong! The hot resistance of Aug. 19, 20, 1989 anything that goes incandescent when cur­ rent is applied is considerably lower than its Hosted by Harbor Soaring Society cold resistance! W ell now, it is a 1-1/2 volt Co-sponsored by Airtronics & Model Builder plug, and if we apply that to it, and insert an ammeter in series, we can read the current OPEN TO U.S. RESIDENT AMA MEMBERS ONLY and then calculate all manner of things, right? W ell, right in theory this time, but Any U.S. F3E FAI team member or anyone who qualified wrong in practice, as I will attempt to explain. for the team selection m ay n o t enter or compete. The practice described above is com­ mon, but a lot more successful when work­ ENTRY FEE: $25.00 ing with higher voltages and currents than is norm ally found in solid state R/C equip­ Seven 1.2 M.A.H. or smaller batteries, any size electric motor, ment. The reason is that the ammeter itself any size glider. Winning planes will be weighed and measured has resistance, and inserting it into any cir­ cuit is going to affect its operation in some to assure they’re within FAI (AMA) F3E rules. manner. In the simple LED circuit shown, inserting the meter at the "X " will increase Send for entry or inquiries to: 7 Cell F3E Contest the total circuit resistance and lower the Felix Vivas current through it. In fact, at these values, the meter w ill have enough effect to visibly 1800 16th St. H-130 reduce the brightness of the LED. Newport Beach, CA 92663 In recent months you have probably read reviews of R/C systems in which the writer somewhat proudly reports that the current Now for our glow plug current readings! What then is the answer? Well, as much output of the system charger for the subject You will find that with an ammeter in the as I dislike hacking at something, I can also radio system is a "measured" X milliamps, circuit, you will read somewhere between be practical when necessary, and this is one implying that he actually tapped into the two and three amps. A lot of current for of those cases. You start out with a handful circuit and reported its reading. Not with such a low voltage, but then that glow plug of low value, less than one ohm resistors, any degree of accuracy, if done with the is almost a dead short. In fact, just for the and with the wiring and connectors you usual $19.95 Radio Shack meter, hedidn't. It heck of it, using an average of 2.5 amps, the will be using, try different resistance values takes a good quality meter, for which the plug resistance calculates out to .6 ohms! until you get the glow that looks right. ... manufacturer furnishes the proper specs You will almost immediately discover for Unscientific, to say the least. But I'm not which have to be understood and used to yourself why the ammeter method of mea­ going to disappoint you— I have a better so­ calculate the true current after the meter is suring the current in this case is so ques­ lution. Use a power diode to drop the vol­ removed from the circuit. If you care to test tionable. You will notice that the reading tage. Right, any power diode rated at more this out for yourself, set up a test circuit at will vary as you move the meter leads, than three amps (five is better, such as Radio about a hundred mils, and then switch change to different leads, move or use dif­ Shack's 276-1141), connected in the proper ranges on your inexpensive meter. The ferent plug connectors, etc. And you will polarity, will very effectively drop the vol­ widely differing readings you'll usually get definitely notice a change in the plug's tage of Stoney's two-volt cell to a quite ac­ are due to the different in-circuit resistance glow with and without the meter in the ceptable voltage at the plug. W h y so? W ell, of the meter on different ranges. circuit. any silicon diode causes a voltage drop of .7

MAY 1989 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 85 APPLIED DESIGN CORPORATION P.O. Box 3384 or backward slant up to 40° Considering Torrance, CA 90510 how much time and money many of us in­ BACKUP! vest in some of our models, the cost of these M IN I ^ SANDER Unit switches to backup pack if markings to make our ships authentic or main fails, use with standard/ ADJUSTABLE TENSION mixed MaH packs! $47 HAND BELT SANDER merely to personalize them is minor. Com ­ FIRMLY HOLDS PAPER plete descriptive material including fool­ FOR EASIER SANDING proof ordering instructions are available GLITCH • Piddtd Hats and curvts • Handy to Hold <* *o C r- from Vinylwrite at 16043 Tulsa St., Granada BUSTER! •EnytoU*· oZ.bb Hills, California 91344, or you can call 6 Channel optical isolator/signai MINI-STRIPS PRECISION 0IE-CUT Medium Garntt (818)363-7131 from noon to 6 p.m. PST. booster. Use separate Rx & Servo SAVES TIME ^ REPLACEMENT Fma Garnet I have samples of this lettering and am im­ AND EFFORT S 1 .6 5 SANDING BELTS Asst d Water Prool batteries. Goes between Rx & ser­ pressed by the quality in all respects. I am vos. Add your leads. $42 BAR further impressed that my name is spelled correctly, and not Elroy, as so many of my TWIN SYNC ALUMINUM EXTRUSION Maintains perfect sync over full SANDIN6 BLOCK correspondents address me even after RPM range! Use separate throttle Mr use with RUFF-STUFF seven years of EC. But Art— pink? Pink! Satl-adhashre sand paper.' Another service I want to share with you servos. Works on any type engines. Large True Surface a » 7C - $67 Wen't Wear Out 11 Inch this month isA.C.E. No, not Ace R/C, whose Handy to Use 22 Inch $ 4 .1 5 useful and high quality products I have AIL/RUDDER mentioned here a number of times. A.C.E. RUFF Φ ? STUFF in this case stands for "Aviation and Com­ COUPLER • SELF A0HESIVE SHEET puter Enthusiasts," a group whose interests SANDPAPER installs between Rx & servos, con­ lean towards—you guessed it—airplanes nects Rudder to Ail ONLY with rud MAKE YOUR OWN SPECIAL stick at neutral. Allows in­ SANOING SHAPES and computers. They offer program dependent control! $37 • Easy to Use reviews, book reviews, and information • No messy glue or drying time related to aviation and airplanes in general, Medium — Fine - Super Fine S I .1 5 CONTROLLER but also including computer programs for Turn 2 items on or off in­ aircraft modelers. Membership in the or­ M IN I s a w 5 8 5 0 dependently - from 1 channel! ganization costs $10 annually and brings a COMPACT 10 inch HACK SAW Switches 1 amp to 20 volts $37 newsletter every two months detailing avia­ __ SAWS ANYTHING. ANYWHERE Ξ Ξ a n d — a ccep ted ! tion computer programs, events and related JOMAR, 2028 Knightsbridge Dr. Saw has rugged dle-cast frame with comfortable, chip-proof plastic In­ information available to A.C.E. members. Cinti.. OH 45244 I 513-474 0985 sert handle Receding nose and ad­ For information, contact Aviation and Com ­ justable 6 blade gives good wort puter Enthusiasts, 2009 Cam elot Dr., Las access Cuts wood, plastic, metal, and HARDENED MUSIC Cruces, New Mexico 88005; (505)526- WIRE. extra blades 3 S2 05 5645. Sounds just like what some of you Add 20% for postage. Send 50C for catalog. need to help you get in a BIT of flying. . ..

The eyes of Texas are upon us this month; my home state is heard from in the person of Larry Mitschke, of Houston. Larry writes: "I am in need of modifying a servo to act SILK ■ $ 7 .0 0 per yd. Pure imported first quality Japanese silk. as a winch. I recalled an article in RCM Every inch closely woven tor extra strength or Old Timers & Antiques (Feb. 87, Page 141) that described such a m oney b ack For your Reed Valve Engine modification, but it did not go into detail. 9 attractive colors cut to any length: • Diamond Zipper Could you elaborate a little on this modifi­ white, red, yellow, royal, orange, • Flying Quaker • R ed zephyr ^ cation and give an idea of what is going on blue, green, purple, black • Miss Philly Checkerboard pattern in one and two yd. • E a g le t in operation?" squares only: black & white. • Commodore Well, this sounded like an interesting Free swatch available on request. 14a $ 4 2 2 Vj A $ 5 0 o modification and as I went looking for the Model Covering Company article mentioned, I wondered how I could 2320 Ocean Parkway, Brooklyn, NY 11223 STA2LIT FUSE 10’-$322 15’ $4°o 25·- 522 have missed it completely. There was no (718) 375-1288 1989 Illustrated Plans Book £2.50 question w hy w hen I reached the propier B&O MODELS V place, it being buried in what might have volts in any circuit into w hich it is in­ P.O. Box 12518 Reno, Nevada 89510 tKjyr· been an interesting project had it not ended troduced. Actually, I think the real figure is only in making the aptly named Ugly Stik .73156 89— and a half!— but we can live with even uglier. I like my model airplanes to .7, right? The end result in this case is that look like airplanes, not things! It is only an the voltage at the plug, less that of the leads, thing. Instead of hours of measuring and opinion, I know, but in my humble one, air­ is 1.3, enough to light the plug to a healthy cutting, all you have to do is pick a print planes have canopies, and pilots, and glow and definitely enough to start any en­ style, size and color, and mail offyourorder. cowled engines, and resemble those that gine that is going to run. After all, the In a few days your custom-made lettering full-size people fly in. No, I don't like flying greatest percentage of glow plug power cur­ arrives, pre-aligned and pre-spaced, ready Big Macs or lawnmowers either. Flying rently in use is a single Ni-Cd cell at 1.25 to apply to your latest dream flyer. The ac­ soapboxes? W ell, a little, I guess! volts, so the 1.3 w ill work just a tad better. tual markings are 2 mil thick vinyl, which Anyway, for our fellow flier in the Lone * * * come on an application strip which is ap­ Star state: All servos include an internal Airplane markings were mentioned back plied to the airplane surface intact. After potentiometer, usually 5K ohms in value, in January, as I pointed out an interesting ar­ rubbing the letters, the strip is peeled off, to connected as a voltage divider. It is inter­ ticle dealing with the subject that appeared leave the individual letters and numbers. nally geared to the output shaft, and the pot in RCM. Admittedly it was a tongue-in- Neat, neat, neat!!! wipier is moved across the element in exact cheek mention, and those of you who Vinylwrite offers you a choice of charac­ step with it. Since the servo output gener­ bothered to look it up and read it will un­ ter heights in 1/4-inch increments from 1/2 ally turns 90 degrees, so does the pot wiper. derstand why. Anyway, soon after, I was to 12 inches, eight character styles, and Now, the pot elem ent is made in a 270 reminded by Art Morgen of Vinylwrite Cus­ seventeen colors including brushed metal­ degree arc, so if the pot w iper moves across tom Lettering that there are easier and more lic silver and gold. Expanded or com­ it for 90 degrees, it is varying the resistance modern ways to accomplish the same pressed text is available, as well as forward exactly 1/3 of the total 5000 ohms— 1666

86 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER RELAX. W E CAN FIX ΓΓ! rrSA SIA RIEW K The first “rookie-to-ace in eight flying days” that is ALSO repairable. RC is suppose to be fun—not terror filled anxious moments. Introducing the first ARF that is truly repair­ able —yet meticulously handcrafted, one by one, using easily repaired balsa and foam construction. Easy to fly the first time.. .easy to move into aerobatics.. .easy to repair.

© NOTICE: Because STARHAWKS are meticulously handcrafted they remain in limited sup­ ply. See your hobby dealer soon for delivery details.

Thorpe Engineering Corporation

1715 East Fairfield Mesa, Arizona 85205 (602)964-1398

c 1988 TECH

M o d e l: A m y Ly n n (iru n e w a id M a k c -L p & H a ir V in c e Fancy

MAY 1989 87 and the pot turn the same amount, the servo p e c k Silver-Streak w ill stop after its normal 90 degree rotation. However, if the coupling is varied mechani­ cally, as with different diameter pulleys in, say, a 2:1 ratio, the servo w ill operate 180 degrees. A ratio of 3:1 w ill result in 270 degrees of rotation. Regardless of the ratio RUBBER POWER, C02, ELECTRIC used, operation of the servo will still be QUALITY KITS,PLANS, TISSUE,PROPS, fully proportional as before. Now you've BEARINGS, WHEELS AND MUCH MORE got the idea, right? 035 ELECTRIC MOTOR C02 ENGINES There are a couple of things to consider SUPER LIGHT WEIGHT ELECTRIC TELCO ■ MODELA ■ BROWN ■ DAVIS yet. O n e is that most servos have some sort WEIGHT ONLY 2 .6 OZ , USES LESS CURRENT LOWER CURRENT MEANS SMALLER BATTERIES ALSO NEW I THE " 13 00 R /C B LIM P " of internal stop on the output gear to pre­ TURNS 6-3 PROP 12000 RPM . ONLY 6.S AMPS CATALOG #30 - $2.00 vent full 360 degree rotation. This stop will IDEAL FOR SMALL R/C Λ FREE FLIGHT have to be identified and removed. Se­ FLY 30 TO 48 INCH WINGSPAN MODELS Peck-Potymers condly, as stated earlier, servo neutral is not MOTOR ONLY $19.95 necessarily pot neutral. To adjust one to the R/C OR F.F. SYSTEM $62.95 ' BOX 2498 LA MESA, CA 92044 other, the servo is set to its desired neutral, PHONE (619) 448 1818 and after power and a signal are applied, the pot is turned until the servo stops. When both neutrals are synchronized, the TUB EST FI mechanical drive is connected and the in­ STARTER BATTERIES. stallation in the model is complete. 12 Uolts 4.0 Rmp. hour However, there is an easier way: Futaba's BO-P ASSOCIATES with S110 Sail W in ch servo, rated at 122.3 ounce- more then 25 years inches of torque, with a 21.8 -inch stroke in Experience In the Design, 3.8 seconds. But it's fun to tinker, and we Manufacturing, and sure hope Larry's project is not an even Assembling of Nickel Uglier Stik or some other flying Cadmium cells and abomination. batteries, now presents Next month, the subject is voltage regula­ the FINEST STARTER tors, so stay plugged in! And don't be BATTERY FOR YOUR bothered by the fact that not all of your STARTER, with Charger. friends understand your interest in the inner Just Charge It once, and workings of our R/C equipment, just re­ mind them that ELECTRONIC TECHNI­ it will last the weekend for Starting your Plane. Rlso 2.0 and 7.0 Rmp. Hr. CIANS DO IT WITHOUT SHORTS! · For your battery needs, tBSSCDOCOffiirES IP.®. 2 2 ® 5 4 Call or write: , ITS! Ι®ΟΙ«®2-ϊϊ®7 Plug Sparks... Continued from page 42

look about them as I now have 14 thinner fins rather than 12. I feel the engines run S c h l u e t e r F r e e F l i g h t M o d e l s JET ENGINES cooler and better. Also, the cylinders now come finished in Electroless Nickel plate (like the Bunch engines). This is a much more durable and less risky plating process. Did I tell you I lost 47 cylinders in a cad plat­ 0 ing attempt? No more cadmium! Orders are 9 accepted but produced in small batches. PACIFIC ACE (PA) BLACK BULLET(BB) "O hlsson engines: In the same vein, I still KIT NO. PRICE EACH POWER build Ohlsson Cold Seal engines, although JET-X 50. DYNA-JET, TURBONIQUE, P-38, PA OR B B - 20" $ 7 .9 5 RUBBER I must admit none have been shipped in VALVES, PLANS, AND BUILDERS SUPPLIES. PA OR BB—30" $ 1 4 . 9 5 RUBBER SURPLUS GAS TURBINES. PA OR BB—40" $ 2 1 .9 5 RUB/GAS about 15 months. I guess I make it too em­ DYNA-JET ENGINE...... $195.00 KITS CONTAIN ROLLED PLANS, SELECT PRINT phatic when I say no more Ohlssons after JET-X ENCINE XIT...... $22.50 & STRIP BALSA, WIRE, WHEELS, PLASTIC PROP the initial offering of gold plated Ohlssons. JET BUILDERS NEWSLETTER...... $12/Yr OR BALSA PROP BLANK, NYLON THRUST CURRENT COPY...... $1.00 "Right now I provide the Cold Seal en­ 25 PG. CATALOG...... $5.00 BEARING, BALL BEARING WASHER (3 0 " & 4 0 "), JAPANESE TISSUE, PLYWOOD, AND ALUM. gine in a plain steel version. These are func­ DOYLEJET MOTOR PEG. a d o $ i.oo p a h f o r e a c h k i t o r d e r , c a . r e s . ADO 6*fe TAX. 4015 San Jacinto St. #404 D tionally like the Commemorative Ohlsson I 3508 POINSETTIA AVE. HOUSTON. TEXAS 77004 (713) 440-4744 MANHATTAN BEACH, CA. 90266 built. However, the status of Ohlssons is that they may be ordered, but delivery is limited to a group completion. ohms to be exact. An important fact to re­ is not produced, the servo will continue to "Hurleman: At present, I am not accept­ member here is that the w iper is not neces­ run. ing orders for the Hurleman 48 or the Twin. sarily centered on the pot element at servo This then is the secret to the winch opera­ Although I consider the 48 a good engine, I neutral. The active one-third of the element tion described. The feedback pot is discon­ am doubtful if I will ever make anymore. It is always off towards one side or the other. nected inside the servo, the connections would have to be a heavy demand to get set Now, when the servo is com m anded to being brought out to an external pot of the up again. move off center, an error voltage is pro­ same value. Here it gets tricky, and the re­ "Lykens Brown: Here is the engine that duced, whose amplitude is determined by quirements will vary for each individual in­ has been the bane of my existence. Bill 'th e amount of travel to take place. As the stallation. As the servo is commanded to Brown makes the Lykens. I got involved servo operates and the wiper simultane­ run, it has to also be linked m echanically to when Bill asked me to announce, advertise, ously tracks across the pot, a voltage oppo­ the external pot. In the diagram, the servo is ship, and otherwise handle the distributor­ site in polarity to the error voltage is pro­ equipped with a pulley that winds up a ship of his Lykens. That was four years ago! duced by the voltage across the pot. When cord or cable. The cord also drives another "This situation has caused me a terrible these two voltages are equal, the servo is pulley attached to the pot shaft. It then be­ amount of grief, a lot of time answering commanded to stop. If this opposite voltage comes a matter of ratio: if the servo output queries, availability, etc. Never again will I

88 MODEL BUILDER BLACKFOOT J-COMBO FX10 +COMBO RC-10 Ball Bearings $199.95 $157.50 ^ +CO M BO

£99.95 $267.50 TRUCK ONLY

$16 7.50 S57 50 CAR ONLY C A R O N L Y

MIDNIGHT PUMPKIN STRIKER +COMBO TURBO ULTIMA +COMBO +C O M B O s i r f i $187.95 * $289.95 $202.95 $ 1 8 9 .9 5 - C A R O N L Y m m $102.95 $ 8 7 .9 5 « T R U C K O N L Y C A R O N L Y

BASIC COMBO INClUOf 5 70» Iu*oboο· Α-τγο«κλ Bode. Pro»~ 703Oorgw. Sanyo ( « >ng (e n try Pock.

W e Can Assemble Cars When Purchased With Combos. Ask About Price When Ordering

LUNCH BOX +COMBO HORNET +CO M BO $192.95 $194.95 *5

$94 .9 5 C A R O N L Y $92 .9 5 T R U C K O N L Y

BASIC COMBO INCLUDE S 70· Fuloba ο» Ant. on < t Rod.o P.o»#« 703 Charger. 6A51C COMBO N ClUD fS JCK Fulobo of A.rtrotwe» BofJ.O. F.olii 703 C W g«, Sanyo Rocmg Bolter y Pock Sanyo loting loltCfy Pock FULLY ASSEMBLED AND INCLUDES PISTOL GRIP RADIO

MONSTER BEETLE CLOD BUSTER , +CO M BO JRX2 +COMBO t t +C O M B O ^ $329.95 $289.95 « r r tn $239.95

$22 9 .9 5 TRUCK $139.95 ONLY T R U C K O N L Y $18 9.95 C A R O N L Y

BASIC COMBO INCLUDES TCh Futobo or Awtiomo >od>o. Prolec /03 Chorge· BASIC COMBO INC lUO f5 70» Fulobo or Α«Η©η<»Κο«ί·ο. P'Otec 703 Charge· Sonyo Rot <>m> Ballrry Pock. Sanyo Boone Battery Pock

CARS | PROTECH BASIC COMBO UPGRADES: Grasshopper I I ...... $ 75.95 700 D igital...... $ 69.95 AC/DC Adj. Current Fox...... 152.95 701 AC/DC Adjustable ...... 59.95 C harger ...... A d d $ 2 6 .9 5 Boomerang...... 139.95 702 AC/DC 6/7 Cell...... 49.95 AC/DC 6/7 Cell Falcon...... 109.95 707 Peak Detection...... 79.95 C harger ...... Add $18.95 Hotshot I I ...... 175.95 Super Sabre...... 147.95 DELUXE COMBO: Lotus Honda 9 9 T ...... 115.95 Williams Honda F-l ...... 115.95 Pistol Grip Radio, Protec AC/DC T4 With Choice of P lu g ...... S 79.95 Charger and Sanyo Racing Pack: Avante...... 274.95 T1 With Choice of P lu g ...... 117.95 Add $48.95 TO BASIC CAR Sonic F ighter...... 96.95T1X With Choice of P lug...... 149.95 -+■ C O M B O PRICE FOR ORDERS ONLY FOR INFO * PRICES (NO CATALOGS AVAILABLE) (818) 766-6772 CALIFORNIA ORDERS COD Add $2.50 - $3.00 Handling 800-446-6335 PLUS Shipping — California Residents (OUTSIDE CALIFORNIA) (818) 506-7564 add6'/:% tax. No extra charge for credit card orders. Please allow time for personal checks to clear.

PRODUCTS

12420 Burbank Blvd., North Hollywood, CA 91607 Hours: Mon. - Fri. 10-7, Sat. 10-5, Sun. 12-5

All items are subject to prior sole or manufacturers availability Not responsible for typographical errors. Prices subject to change without nonce. with an engine that fails identification. CHEETAH MODELS 14725 Bessemer St. "B" Not many of the old timers are aware that SLOPE ACROBATIC. COMBAT GLIDERS Van Nuy8’ Ca’ 91411 the Roamer was originally called the "Pur- suitaire,"a model by Model Developments, SUPER CHEETAH CHEETAH Inc. of Brooklyn, just before the war started S p a n : 6 4 in. Span: 48 in. an amalgamation of hobby dealers and Area: 496 sq. in. Area: 432 sq. in. manufacturers occurred when Bay Ridge Weight: 34 oz. Weight: 32 oz. Models, Burkhard Models, and Jerry's Loading 1045 oz./sq. in. L o a d in g : 11 oz./sq. ft. Hobby Shop (which included the Pursuit- $49.95 $42.95 aire design) got together. Eventually, Art Hasselback emerged as the number one man in charge of running the firm, known as Consolidated. Consolidated continued well after the war producing many control line kits in re­ UNBREAKABLE sponse to the latest modeling craze. At last FUSELAGE reports, Art is still alive and kicking in the Brooklyn area. DEALER INQUIRY INVITED (818)781-4544 SIMPLY SENSATIONAL That is about the only way to describe the dedicated effort of Jim Alaback, newsletter editor of SAM 41, a revival of the old San Diego Aeroneer Club. H o b b y H o r n Alaback is not only to be comm ended for hobby specialties his efforts to have Joe Weathers put in the Kits from PS W AM A Hall of Fame, but also for his tremen­ Model Service dous amount of work tracking down all of 1935 Miss America 84" $71 96 1936 Buccaneer 84" $59.96 the Weathers designs. 1937 Dallaire 108"' $75 16 1938 Clipper Mk I 72- $ 4 1 5 8 This writer was recently the recipient of 1938 Kloud King 63“ $42 36 1938 Powerhouse 84’ $53 56 1938 Record Breaker 96* $69 56 1938 Trenlon Terror t T $40 76 A Nationals Winner two compilations of Elbert "Joe" Weathers 1939 Korda Wake 44- $19 16 1939 Mercury 72* $58.36 designs and newspaper clippings. The first 1939 Zipper 54* $53 56 1940 Rangor 46* $3196 The “ Heinkel” He 100-d 1940 Sailplane 78' $84 76 1940 So Long 50* $30 36 24“ Wingspan — Rubber Powored Flying Scale is rather astonishing in the respect that this 1941 Bngidler 56" $40 76 1941 Supor Quaker 78* $72 76 1941 Playboy Jr 54* $ 3 1 1 6 1941 Playboy Sr 80* $ 5 1 1 6 $ 1 5 .9 5 Kit *1I0 writer thought he knew almost all the 1941 Brooklyn Dodger 56* $42 36 Your old building skills will enjoy Ihe experience Time loo lo gel your son Teaming how A beaulifu! kil In Ihe Flylmc Weathers designs. Alaback has been suc­ Midway Model Co.: Full Kits tradition, contest winning llighl ability. Decals. Canopy and Spinner are included Quality balsa, a kit wa are proud ol cessful in making up three-views with de­ 1936 Flying Quaker 84" $64 76 1938 Powerhouse 50“ $29 96 1937 Long Cabin 78’ $47 16 1939 A T Sporlser 50’ $29 δ WoVe got a whole lino ol old fav

90 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER c 1988 Futaba Corp. fessor ideal for novice flyers. flyers. novice for ideal fessor of few a just are assembly ARF electric flying easier than ever. ever. than easier flying electric the features that make the Pro­ the make that features the the radio control trainer that makes makes that trainer control radio the h o ed oasmble. assem to ready box the h o lt oesrktcme u f o out es com kit rofessor P plete com The Go to school with the Professor, Professor, the with school to Go Clean, quiet flying excitement flying quiet Clean, Extremely stable design and design stable Extremely It’s elem entaiy w ith th e Professor. e th ith w entaiy elem It’s

fessor show you how how you show fessor radio and batteries and you’re you’re and batteries and radio propeller the Mount ages. stabilizer, attach halves, simple it can be. can it simple Pro­ the ready for takeoff. for ready install motor, RS540SH Mabuchi powerful the of gearbox the to link­ pre-installed and tail assembly special for need wing, pre-covered built-up, And rigidity. and strength for exceptional fuselage the for used are rials is as close as the the as close as is Futaba and and Futaba skills. Simply join the wing wing the join Simply skills. the eliminate stabilizer tail and schoolyard. Advanced, lightweight mate­ lightweight Advanced, l .Aerbai rb/uaaChp unk hipm C irobo/Futaba H atic rob e A t. ilo p (A vailable soon). advanced ore m vailable the (A r fo fun g in trify c le E ac. cfctos IChne;15o. (excluding 1.24 oz. 1.5 ectors); hannel; conn C -I l and h tro n itc co w s d ecifications: speed e p d FET S S clu O M in d mance. te (Not r ra g ive te ce In re CR-4A M Futaba Voltage regulator. Voltage 555 West Victoria Street Compton, CA 90220 CA Compton, Street Victoria West 555 Futaba Corporation ot America ot Corporation Futaba (electronic speed control optional). control speed (electronic system control radio Channel 2-4 andcharger. Area REQ U IRES: 7.2v/1200mAH NiCd battery pack 7.2v/1200mAH NiCdbattery IRES: U REQ Recommended Motor Weight(w/rec. lyiteni) Wingspan Length FI ONS N IO T A IC IF C E P S R O S S E F O R P ) equied oro i peror­ rfo e p m u tim op r fo d ire u q re system ' x x ' 92 .9 2 39 oz. 39 in sq. 446.5 (1240mm) 48.82“ (890mm) 35.04' reduction gearbox reduction w/3:l RS540SH Futaba 4NBL/MCR Futaba

xx '

0.637 BEC 0.637

/

38 to 50 inches, with most averaging about 44 inches. They are available in two forms: Basic and Complete. Basic kits include wing cores, fiberglass fuselage, plans, and complete instructions. Complete kits in­ clude all the Basic parts, plus all wood parts, fiberglass cloth, and linkages for an additional $30. Basic kits are each $59.95 with one exception: the Corsair is $69.95. Shipping and handling add $5.00 each kit. For more information, contact Cliff Hanger M odels at P.O. Box 9081, Torrance, California 90508, (213)320-4530. DCU DCU has three new slope gliders in its lineup: the Dragon Fly, the Super Dragon Fly, and the Stryker. Each kit features light­ weight epoxy fiberglass fuselage with canopy, foam wing cores, machine cut balsa and ply parts, and extensive hardware. The Dragon Fly is a 50 inch span mini- sloper that is quite aerobatic. It has a wing area of 257 square inches, a length of 30.5 inches, a flying weight of between 17 and 2 0 ounces, and requires a two-channel radio. The Super Dragon Fly is an aerobatic and using a NACA 2312 semi-symmetrical "Dutch rolling." Adding fin area and/or re­ model of 70 inch span, 42 inch length, 560 airfoil and ailerons (horrors!). ducing dihedral will help but then, of square inch area, and 38 to 42 ounce flying As can be seen in Photo No. 11, the model course, the model is "out of scale" for Old weight. It too requires a two-channel radio. is powered by a British Laser 61 four-stroke Timers. The Stryker is a very stealthy-looking engine. This well built model was an excel­ THE WRAP-UP blackbird-type model. I don't know if it is lent showpiece but as Don says, despite fly­ Hard on the heels of the cancellation of supposed to be a scale model of anything, ing very well, he succeeded in crashing it. the proposed International SAM Champs but you sure could pass it off as a Truly a shame! scheduled for Stead Air Base, Reno, comes "something." Canada the news from SAM President, jim Adams, Its wingspan is 48 inches, its lifting area is Although we have seen a photo of this that the Champs w ill be held at a large dry 410 square inches, its length is 37 inches, model before, Bruce Thompson of 328 St. lake near the California-Nevada border. Ac­ and its flying weight is 37 inches. It features Germ ain Ave., Toronto, O ntario M 5 M 1W3, commodations will be at the border a one-piece fuselage, clear canopy, foam Canada, builds such nice models and takes casinos at very reasonable rates. The meet core wings, machine sanded balsa and ply equally good photos, it is hard to resist dates have been moved from June to early parts, and extensive hardware. using what he sends. Photo No. 12 of October to avoid the high desert tempera­ Contact M ark Ham belton at D C U for Bruce's Red Zephyr is an excellent example tures. The casinos on the border are located more information: 1556 S. Anaheim Blvd., of what this columnist is talking about. 43 miles from Las Vegas, so make your Suite C, Anaheim, California 92805, Note the strict adherence to the original plans accordingly. · (714)535-6969. color scheme. Hobby Lobby Sweden Dave Martin at Hobby Lobby showed me R /C S o a r...... Continued from page 37 This is finally the "Last of the Mohicans" the relatively new Graupner Elektro-UHU as far as the supply of photos on hand is that possible, you ask? It is made possible (pronounced "oo-hoo"). This really high received from Stan Persson and Sven-Olov by more evenly distributing the plastic, performance 6 - or 7-cell electric motor- Linden. Stan has sent in Photo No. 13 show­ w hich used to be concentrated in the nose glider has astounding climb performance ing Sune Stark, 1951 Wakefield winner, pre­ section. The result is a much tougher, more and wind penetration. It will thermal with paring his model for an official flight. The indestructible (huh??), prettier fuselage that the best sailplanes, yet its thin airfoil gives original 1950 Wakefield is being held by an­ will outlast many a disposable foam core the U H U excellent ground covering ability. other famous Swedish Wakefield flier from w ing and stab. The U H U is a Graupner Q u ickie kit the thirties, Ake Roggentin. These new fuselages are available now in which comes complete with preformed SA M 53 a rainbow of six striking colors: black, red, fuselage, two-piece rib and spar construc­ The "Sod Busters" R/C Club, w hich forms orange, yellow, blue, and white, for a price tion wing, and precision cut balsa parts. the nucleus for SAM 53, the "Sioux SAMS," of $20.95 plus $3.00 shipping (and Califor­ The motor and prop drive unit (which is op­ is still quite active according to Mark Glam- nia tax of 6.5% if applicable). tional) comes with a 104 watt, 18,000 rpm, mier, Secretary-Treasurer. Call or write to Robert Pettyjohn at Speed 600 motor, Scimitar shaped small Mark writes to complain about a flight Cheetah Models, 14725 Bessemer Street folding prop, connectors, wire, and assem­ problem in his Scientific Flagship as seen in Unit B, Van Nuys, California 91411, (818)781- bly tools. Together, these kit items com e to Photo No. 14. M ark says the model flies 4544, and ask for a product flyer and price about $119. with a rocking motion of side to side. Mark sheet. Fly a Cheetah and stop worrying Also noted in the Hobby Lobby booth, says he has tried about everything to cure about crash damage! pictured on the outside of a colorful box this problem, but to no avail. Cliff Hanger Models label, was a sleek new electric powered This characteristic is noticeable in all the Marty Silberstein and Steve Peacock have scale version of the ASW-22B. This is a Scientific designs by Ben Shereshaw. In de­ themselves a gold mine of exciting little three-meter, aerobatic capable, T-tail ther­ sign the Ensign, Flagship, Mercury, Starling, power scale slope flyers! Currently availa­ mal soarer with performance claimed to Eaglet, and Commodore are all alike with ble scale subjects for aerobatic slope fun rival Unlimited Class FAI F3E competition Ben Shereshaw's propensity for pretty are the F-20 Tigershark, the F-5E Tiger II, the models. shaped vertical tails. Flowever, by and large, P-40 W arhaw k, the KAI-100 (improved If you are interested in model sailplanes these fins are generally inadequate in area, Zero), the P-51D Mustang, and the F4U-1A and you don't have a Hobby Lobby catalog, hence the model ends up with what we call Corsair. These models range in span from I suggest that you call them at (615)373-1444

92 MODEL BUILDER SHELDON S HOBBIES POSI-CURE ™ CYANOACRYLATE SALE WE’VE GOT THE CURE W e’ve got the cure whether you’re torn, ripped, shredded, frazzled, smashed, crushed, cracked, chipped, fractured, split, snapped and shattered or just a little bit stressed.

1 oz. Fast Cure 3-5 Sec ...... $ 2 . 4 9 2 oz. Fast Cure 3-5 Sec ...... $ 3 . 9 6 1 oz. Gap-Filling 10-25 Sec ...... $ 2 . 4 9 2 oz. Gap-Filling 10-25 Sec ...... $ 3 . 9 6

If you are not satisfied with PO SI-CURE please return the unused portion within 50 days for a full refund - No questions asked! SHELDON S HOBBIES 2 155 Old Oakland Rd. · San lose. California 95151 ORDERS (800) 228-3237 ONLY (800)822-1688 Kff For Information Call: (4081 943-0872 S H IP P IN G - U P S. Surface Add $3.95. U P S. Air Add 10% Parcel Post Add 10%. Parcel Post Air Add 15%. C.O.D. Add S2.50 HOURS Mon & Fri 9:30-7:30. Tue. Wed & Sal 9:30-5:30. Thurs: 9:30-9:00. Sun: 12 00-5:00 and get one delivered to your door. It con­ task thermal soarer. It has 100 inch span, wingspan, 24 inch canard span, 37 inch tains scores of kits and accessories for epoxy reinforced, obechi veneered, foam fuselage, 351 sq. in. main w ing area, 90 sq. gliders and electric motorgliders that you core wings. These wings feature a the popu­ in. canard area, 28 oz. weight, and a two- w ill want to be aware of. O rder it today lar Eppler 193 airfoil at the root transition­ channel radio is required. w hile it's fresh on your mind! ing to an E180 airfoil at the tip for drag re­ Telos was just one of the interesting de­ Hobby Shack duction and light lift performance. The Sitar signs shown in JAD E's booth. There was Hobby Shack and its import/distributor Special 100 features a fiberglass fuselage, also the prototype Equis electric powered company, Global Hobby Distributors, had blue tinted canopy, precision cut wood canard which looked much like a canard three models from its recently acquired parts, and complete hardware. BD-5. There was a swept-forward w ing Sailplanes International kit line on display. If you wish to receive more detailed infor­ ultra-miniature canard of "limited commer­ They were the Mini-Racer, Osprey 100, and mation regarding the Sailplanes Interna­ cial interest" (due to size) called the Tou­ Sitar Special 100. Many of you already are tional line, write to Global Hobby Distribu­ can. There was a gas powered version of the familiar with Sailplanes International be­ tors, 10725 Ellis, Fountain Valley, California Telos. There was the Crossbow canard cause it has been imported to the U.S. and 92728-8610. slope racer which Richard personally flies Canada before. However, this is the first JADE in slope races. And there was a prototype time a major distributor has carried the line. The JADE booth was crowded with .40 powered canard called the Viper. The Osprey 100 is a 100-inch span ther­ unique slope designs. Owner Richard Jarel Finally, the hottest looking sloper I've mal or light-air slope model. It has rudder is a graphics designer by profession and his seen in a w hile was JAD E's Shogun ATF (ad­ and elevator control with optional spoilers. innovative slope models show it. vanced tactical fighter). This is the sharp lit­ It is a conventional wood kit that assembles JADE's Telos canard has appeared in tle flying wing that looks like it was de­ rapidly and accurately. The airfoil is a rela­ these pages before. It is an aerobatic, light signed by a NASA research team. Richard tively thin, high-penetration section which to heavy air sloper that, because it is a ca­ claims its performance is similar to a Scor­ looks much like a Goettingen 795, but is in nard, is very easy to fly. It is im m une to pion or Obelisk, which is to say, very reality a modified Eppler 176. Competition- stalls. It rolls rapidly, holds inverted flight maneuverable and aerobatic. It was only a minded sailplane fliers should consider this easily, performs effortless outside loops, prototype, but it is likely to feature a as a great polyhedral model suitable for a and yet can land at a virtual crawling speed. molded fuselage and foam core wings for wide range of conditions. The Telos is a deluxe kit featuring a simple, quick assembly. The Mini-Racer is a cute, 60 inch, aero­ molded Kevlar/carbon/fiberglass compo­ batic sport sloper that makes an excellent site fuselage with integral fin, blue foam I'm sorry to say that I was just too worn transition model from rudder/elevator wing and canard cores, balsa wing sheet­ out by the show to try and get more infor­ models to more advanced aileron models. ing, spruce leading edges, carbon fiber spar mation from Richard on his models, espe­ The foam core wings come factory pre­ material, molded clear canopy, precision cially the Shogun ATF. Those w ho are inter­ sheeted with obechi wood veneer. The wood parts, com plete hardware, full-size ested should contact Richard Jarel at Jarel fuselage is a molded fiberglass job with a drawings, 19-page illustrated instruction Aircraft Design and Engineering (JADE), tinted blue canopy. booklet, and a special 2 2 -page illustrated 11367 Culver Blvd., Los Angeles, California The Sitar Special 100 is a very high perfor­ composites guide. 90066, (213) 390-1348. Please tell him that mance FAI F3B type slope racer or multi­ Specs for the Telos are: 52 inch main you saw his models in Model Builder!

MAY 1989 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 93 cut balsa parts. It is a very com plete kit which includes such things as an adjusta­ ble (0.4 seconds to 4.0 minutes) electronic 2 3 rd A N N U A L motor timer for two-channel R/C operation, motor, prop, spinner, all hardware, even paint! The RC-Uno-E can be flown with a 6 - cell pack. Its high-lift airfoil and slim profile NORTHROP ^ give it the edge in climb and glide perfor­ mance. Beginners will appreciate its inher­ ent stability and slow landing speed. The FLYING WING selling price of this system is $229.95; the glider version is $159.95. The Robbe Vampir flying wing also made its western debut at the IMS. There is a full­ CONTEST blown product review coming on this one, so I won't go into many details here, but for now I w ill say that it is a big one at 125-inch (swept) span, 991 sq. in. of w ing area, 60 oz. flying weight, and 3-channel R/C. It is definitely unique! Robbe can be contacted at 180 Township SUNDAY, MAY 28, 1989 Line Road, Mead, New Jersey 08502, 8:30 A.M. TO 4:00 P.M. (201)359-2115, for additional information. • Sponsored By: MODEL BUILDER Magazine Sig Models In the Sig booth was a prototype slope Bill Nortiirop, Publisher ^ glider kit called the Ninja. Designed by • AMA Sanction # 382 — AMA License reqd. ^ Mike Pratt (who also designed the Sig Riser 1 0 0 ), this nifty all-wood sloper should prove • Site: Condor Field, Taft, CA to be a winner with slope fliers all over the U.S., should the kit be produced. It was • Time: a.m. to p.m. Λ 6 ' ° 8 :0 0 1:00 prim arily at the IM S to draw consumer reac­ • Jr., Sr., & Open combined in all events tion. I have no other information on this model at this time, and shall await future • Entry Fee: $3.00 each event shows for additional info. Slope Soaring News EVENTS: 1. Rubber Power Charlie Morey has a good thing well 2. Glider (164 ft. towline) started in his labor of love that is about to pay dividends. Slope Soaring News is now a Scale — any power on issue No. 4 and cookin'! It's picking up (20 sec. official) advertisers, product reviews, feature arti­ cles, photos, technical illustrations, maps to 4. Gas — 25 sec. eng. run, or good soaring sites in California, tips on how Electric — 35 sec. motor run to fly aerobatic maneuvers, and lots more! It XB-3S'Yl· 35 • combined event · is typically running 16 pages, and is being published monthly for a cover price of In case of controversy, opinion of Contest Director and Judge $1.50. All back issues have sold out. If you want to subscribe, drop Charlie a will be final. check for $15.95 for one year to: Slope Soar­ Chief CD Scale & Flight Judge ing News, 2601 E. 19th St. #29, Signal H ill, California 90804. I think this is a worth­ Carl Hatrak Bill Stroman while investment for the slope soaring en­ 3825 W. 144 St. thusiast who really wants to stay on top of Hawthorne, CA 90250 current affairs over the slopes of the nation. Scale Model Research I NOTE: Proxy entries encouraged. Send models to flier Bob Banka can give sailplane modelers a of your choice, NOT to Model Builder or CD’s. great deal of invaluable, priceless help when it comes to documenting their next scale subject. SMR has research agents in Germany, Japan, Australia, Italy, and En­ John Pond Plans interest you, give John a ring at (408)292- gland who have helped build up a formida­ Although not in the kitting business, John 3382 on Tuesdays or Fridays, and he can ble library of color Foto-Paaks and three- Pond is most certainly the world's leading help you with these or similar plans. views of thousands of scale subjects. When authority on antique models and maintains Robbe Model Sport you can't go there yourself, let SM R go there the largest single library of old time plans. John Gill of Robbe had on display one for you and get your photos! There are now His plans service can provide you with a very new motorglider based on a previ­ 110 sailplane Foto-Paaks available! Powered wealth of nostalgic model glider plans dat­ ously well accepted and successful glider sailplanes, vintage sailplanes, "glass slip­ ing back many years. design called the RC-Uno; appropriately, it per" sailplanes, you name it, Bob probably Hanging prominently from the middle of is called the RC-Uno-E (for electric). It is has it. Contact him at 2334 Ticonderoga John's booth was his own Frank Zaic Floater your basic three-channel, 80-inch, rud- Way, Costa Mesa, California 92626, R/C assist O ld Timer glider. R/C O.T. gliders der/elevator controlled ARF trainer that (714)979-8058. His $3.00 catalog of Foto- are catching on as a new competition class, does not need a winch, high-start, or cliff to Paaks of over 2,200 subjects is waiting for and it all looks very relaxing and FUN! get airborne. you! Other O.T. glider designs would include the The RC-Uno-E can easily be assembled in Sun Fair Aircraft Designs famous Thermic 100 model that Midway one day and flown the next. It has a molded Sun Fair has been around for more than a Model Co. is cutting partial kits for. Plura fuselage, factory molded Siros couple of years now and has built up quite If any of these plans or others like them veneered foam core wings, and precision a nice little kit line. Added to the Slope

94 MODEL BUILDER « Λ · * * ® * ®

...WHAT A Concept! These Scale Fuselages Also Available Designed for Your Total Support Style of Flying. Means Quality Airtime.

Whether you're just learning to hover W h e n you fly you r C o n cep t 30, you 're or attempting your first advanced man­ not flying alone. We're dedicated to euvers, the Kyosho Concepts were de­ making your Concept experience a signed to give you the quality airtime success right from the start. Clear and that makes R/C helicopters your choice simple instructions put you in the air in for excitement. Novice heli pilots will no time, and our dealer support pro­ marvel at the Concept 30 DX. With gram insures that all the spare parts will built-in stability provided by the ad­ be available to keep you flight-ready. vanced rotor head design and in-line Got a question about your new Con­ Hughes 500 stabilizer, even the new pilot will be cept 30? Call us weekdays at (217) 398- hovering in no time. Experienced pilots 2834 between 9 and 5 CST. W e'll answer will find performance levels approach­ your Concept questions and provide ing a sixty-sized machine from their full technical assistance. bearinged Concept SE. Not only do the Whether you're just considering Concepts fly great, they're built to last helicopters or have already logged a through those “ not-so-soft” landings thousand flights, the Kyosho Concept without decimating your R/C budget. 30s combine the design, technology and support that adds up to what R/C pilots want most - Quality Airtime. So DISTRIBUTED TO LEADING RETAILERS get some Quality Airtime of your own. NATIONWIDE EXCLUSIVELY THROUGH See the new Kyosho Concepts at your Jet Ranger nearest hobby retailer.

*00£l ,L , „ ■**>· © 1989. Hobbko, Inc. O iO .M X W "" soaring aficionados. This year's biannual World Soaring Championship will be held outside Paris, France, August 11-20. People contributing financially will be entered GNOME * into a prize drawing for many fine hobby The "Hi-Performance Compact" products including radio systems, aircraft kits, building supplies, and accessories. RADIO CONTROL SAILPLANE These are goods which have been donated 60"Wing Span free of charge to the team by industry 375'" Wing Area supporters. Donations of $5 will receive the official 12to 15oz. / 2ch R /C U.S. Team patch or lapel pin. Donations of $2 w ill receive a team decal. Ten dollar do­ Optomized Eppler 205 Airfoil nations will receive all three. The official team logo is by far the prettiest yet de­ Hand Launch « » Slo p e ·> ■> High Start/W in ch S34.95 signed. Be proud to be American and sup­ port your team. Not only are they a great bunch of fliers and hard workers, but they are already a team of like-minded and spirited fliers who will do us proud! They are truly the best team we've yet fielded, and they will have the best equipment, too! Seth Dawson, Larry Jolly, and Rich Spicer A SUPER STAND CAN... k e h are the three team fliers. Don Edberg and B I Richard Tiltman round off the team as man­ ager and assistant respectively. “Matched Performance System” M ake team support checks payable to: for T O P PER FO R M A N C E U.S. Soaring Team, P.O. Box 19608-489, Ir­ K&B ENGINES Airplane Marine vine, California 92713. Tim Renaud will be K&B FUELS K&B GLOW PLUGS in charge of all fund raising. 9 Blends 4 Choices A $12 fee earmarked "F3B/USA" will pro­ “Matched Finish System” vide you with a year's subscription to the for BEST APPEARANCE F3B/USA newsletter edited by Randy Rey­ K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER nolds. This will keep you up to date on all K&8 SUPER POXY RESIN K&B SUPER POXY THINNER that's happening with the team. This news­ K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS letter is not funded by A M A . Send checks to the address above. · K&B MANUFACTURING e * £ 121 52 W oodruff Avenue Downey. California 90241 * " Choppers...... Continued from page 27

BE USED FOR—FIELD with the fore/aft cyclic control. M odem full- size helicopters such as the Sikorsky 5-60 MAINTENANCE CARRIER · • EASY FLYING SPORT SCALE · · QUALITY PLANS Black Hawk and Apache AH-64 employ BUILDING/ALIGNMENT JIG · $ 2 5 .0 0 this feature to improve performance. I will PAINTING JIG · STORAGE NO SI UPPING CHARGE—N.Y.S. ADD TAX tell you more in my review of the GMP Legend, the Airtronics Quantum, and the STAND · U.S.A.A.F. AERONCA LI6-B/CHAMP new Airtronics ball bearing SG-1 gyro in an 1/5-84" SPAN .60- 90 2/4 CYCLE COMES COMPLETE WITH upcoming colum n. U.S.A.A.F. AERONCA L3/DEFENDER BUILT-IN TRAY AREAS. The Vision is Airtronics' answer to the JR 1/4-105" SPAN .90-1.5 2/4 CYCLE PCM-10 and Futaba 1024. Since there are AVAILABLE AT YOUR LOCAL RYAN Ml MAILPLANE/IIISPANO ENGINE more helicopter fliers in the U.S. than any HOBBY SHOP. _ 1/6-72" SPAN .60- 90 2/4 CYCLE country in the world, it is logical that Air­ ROLLASON DRUINE TURBULENT tronics decided to produce a "designed in 1/4-65" SPAN .60- 90 2/4 CYCLE the USA" radio. The Vision incorporates a 16-bit microprocessor and the fastest scan • AERO PLANS · rate of any of the PC M radios on the market. P.0. Box 1247 P.O. B O X 9 3 9 . O C E A N N.Y. 14760 (For readers who are not familiar with this 1 (716) 372-7054 St. Charles. IL 60174 jargon, the brain of the IBM minicomputer is a 1.6-bit microprocessor. Higher bit means information can be processed at a Master flying wing and Slope Dart aero­ tion in the w ind when it's time to move out. faster rate; 16 bit means the Vision is quite a batic stunt model is/are the Split-Image The specs on the Split-Image are: 60 inch smart radio system.) All of Airtronics' model(s). wingspan, 464 sq. in. w ing area, 26 ounce helicopter radios com e with five high- Actually a two-fer-one kit, the Split-Image flying weight (add a minimum of 10 ounces quality servos, but only a 700 mAh receiver offers the beginner a single model with two for electric power), and the radio require­ battery. I would like a 1000 or 1200 mAh re­ wings and personalities. He or she can ment is two or three channels. The kit ceiver battery pack because I always put in learn the basics of model building and fly­ comes with all parts needed to make both at least five flights during every practice ses­ ing with the conventional structure, poly­ wing sets and the fuselage and tail group. sion. For people who have replaced the hedral winged rudder/elevator trainer. Then Full-size plans and complete instructions standard 500 m Ah pack with a 1200 mAh when he has mastered that, he reaches into showing both wings are included also. The pack, make sure you buy a new 120 mAh his kit box and pulls out his second wing Split-Image is expected to list for $89.95. rate receiver battery charger! The stock w hich is a foam-core aileron job. Both sets For more information, telephone Steve chargers from all the manufacturers are of wings are basically flat-bottom airfoils Crochowski at (619)434-4492. only 50 m Ah rate, w hich can fully charge with Phillips entry. This gives you all the ad­ U.S. FAI F3B Soaring Team the stock 500 mAh receiver battery in ten vantages of slow flying speeds when it's The 1989 U.S. Soaring Team has been hours. But it would take a lot longer to time to land, but a fair amount of penetra­ selected and is seeking support from fellow charge a 1200 m Ah pack!

96 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER Only an experienced kit designer could bring you a field box that’s engineered this well.

Transmitter fits “sticks-in" for carrying, or “sticks-out” for starting and run-up.

Full one-gallon fuel can or bottle fits securely on Adjustable, easy-to-remove, end platform sponge-padded cradle tilts 45° to both sides, takes fuselages up to 5 'A " wide.

Power panel compartment Easy-access compartment accepts all popular brands. for tach, cleaners, etc.

Starter compartment accommodates all Battery compartment divider popular brands. isolates power panel.

Large, vented battery compartment with removable front panel.

Two large-capacity tool drawers with self-locking Velcro strips handle up to 13" props.

Slim-line profile and balanced load for easy carrying. Special uroods for light weight and high strength. The Super Tote. From Carl Goldberg Models.

your kind of sense. sharp photos and drawings. From the logic of its layout to See the C.G. Super Tote at the high quality of its precisely cut your favorite RC dealers, or order materials and complete hardware one now. package, the Super Tote is a winner. It’s time you had a field box Your equipment is right where that was as well-engineered as the you want it, and with its balanced planes you fly. load and narrow profile, it even carries better than the others. And just like our planes, we CARL GOLDBERG As a seasoned RCer, you can make assembly easier with a fine spot it right away. step-by-step instruction booklet MODELS INC. This is the field box that makes that’s illustrated by lots of clear, 4731 W EST CHICAGO AVE . CHICAGO. IL 60651 Galaxy and the Futaba 1024,1 think the pro­ gramming is well planned by the manufac­ turers. These sophisticated radios are not intimidating. For example, the Futaba 1024 manual clearly illustrates with figures how you can set up the collective pitch in five different ways. O n e of the choices is it can have all three servos move at the same time to move the collective up and down. The modeler can also program which toggle Antique & Vintage Premium Aircraft switch will operate what. For instance, John D oe might program the top left switch to be the elevator dual rate switch, and the top KITS right switch to be the rudder switch. Of For catalog send 1st class stamp to course, the gimbal tension can be adjusted. I like the smooth and soft feel of the sticks Roger Teagarden 1234 N Edgemont St+204 Los Angeles, CA 90029 because they help avoid PIO (pilot induced 213-662-9323 oscillation. PIO occurs when the model is too sensitive, or w hen the stick is too tight, leading the pilot to over-correct and cause the aircraft to oscillate). What was new in R/C helicopters at the IMS? Great Planes proudly showed off their # 6 new Kyosho Concept 30 DX and SE heli­ copters. I have logged over a hundred flights on my Concept. I think it is one of the best and most stable mini-helicopters that I have TY-SIX OF WALT MOONEY’S FAVORITE ever flown. Regardless of its size, this is one of my favorite helicopters of all time. This A j tPEANUT A I SCALES REDUCED TO EIGHT INCH helicopter is more revolutionary than a ^ S ^ / I N 'G SPAN ************ $ 5.00 POST PAID evolutionary. For instance, take Miniature Aircraft's X-Cell. The X-Cell flies great, but it is a very conventionally layed out helicop­ ter. The X-Cell borrowed the best features from the best helicopters in the world and improved upon them. Borrowing great de­ iWALT MOONEY P.O. BOX 231192 SAN DIEGO, signs and refining them is certainly a very CALIF. 92123 *** FIRST FIVE PEANUT SCALE smart way of designing a new helicopter. The refinements that went into the X-Cell BAGS STILL AVAILABLE AT $ 5.00 EACH. made it an extremely successful and re­ spectable m achine. I think its contest record speaks for itself. However, Mr. Taya, 2 CHANNEL PISTOL GRIP the former F3C World Champ and designer Build a Paper Orbiter of the Concept, took the adventurous route. WHEEL R/C On 75 MHZ Build for display or hand launch He designed the machine from the ground up rather than scrounge other designers' Easy handling for high ideas. There are three major reasons why speed racers with 2 high the Concept is so stable: I) The main rotor torque servos Battery blades are torsionally soft and have a very box receiver and switch forward chordwise C C to create lagged-rate harness feedback to help stabilize the vehicle's lon­ $ 7 7 9 5 gitudinal and lateral motion; 2) It has a softly loaded offset flap hinged main rotor NASA Space Shuttle Pw .ist· .Kin V» OO snipping .n d nanorng to take advantage of the smoothness of the TPIong 8"wingspan Printed on cn.vge ro payment ο» you' cxoe» m articulated rotor design, and yet the offset money cvne» cerrifieo cneot high quality gloss paper COOor atteot.iWem.no· trertt card 'irvkKJe gives controllability; 3) It has a unique slid­ account numoe* .w Kieipiratonaare· Send $4.00 check or money order to: ing Bell-Hiller mixing unit that gives almost SABO Designs in Paper 546 Bergen Ave. Jersey City, N j 07504 9 5 % Bell-Hiller mixing ratio, which is the P.O. Box 161742 Telephone 1201) 552 8100 Dept 27 Altamonte Springs FL 32716-1742 highest I have seen on a collective pitch Ί α α χ ή ' Ά 180° 7 2 5 Ρ α κ 9to5 » ESI helicopter. The Hirobe DDF head has Florida residents add 6% tax about 80%, Kalt Blackhead about 70%, and the C M P Prohead has about 50%. The Con­ Futaba has the longest history with helicopter pilot capabilities. They are all cept has many innovative design features helicopter radios in the U.S. I have used listed in Table 2. Futaba has also decided to which I will go over in a future review Futaba radios in my airplanes since 1974. I include five servos and a 1000 mAh re­ article. have crashed umpteen times, but the radios ceiver battery pack on its top three helicop­ As usual, C M P had the largest helicopter were never damaged due to the crash. I al­ ter radios. Bravo! I think all manufacturers booth at the show. It was manned by the ways wrap my receiver and battery in many should do this on all their helicopter radios. many times National Champion, Robert layers of foam. I don't recommend using The PC M 1024 is the creme de la creme Gorham. He was busy explaining the fea­ double-sided tape to tape the receiver and of Futaba heli radios. It has more than tures on G M P's new .60 sized Legend. The battery to the helicopter cabin. That might enough features to keep you playing with it modelers can purchase the Legend with a look neat, but you'll pay for it w hen you for a long time. The book-like instruction flybar or a flybarless Delta-3 head. Of crash. Futaba has discontinued the gold manual is very clear. At first I worried that course, they were showing a video of color FG7Hi and the dual stick 512 PCM. these ultra-sophisticated radios might re­ Robert doing some smooth and wild aero­ For 1989 Futaba offers six different helicop­ quire a lot of studying to learn how to use batics with the Legend. C M P also displayed ter radios to meet the vast spectrum of them, but after seeing and playing with a JR the world's only tandem rotor R/C helicop-

98 MODEL BUILDER ter kit (about $1500). Then, there were the perennially popular GMP Cobra, King Cobra, Cricket, Shuttle and the beautifully JOHN POND ^ prefinished fiberglass fuselages for the Shuttle and the new pint-size Bell 222 fuselage. Old Time Plan Service My friend Vince Canzanese flew in from The largest selection of plans in the world at the most New Jersey to take charge at the Robbe/Schluter booth. He was displaying reasonable prices. Each list $1.50 the 1989 improved Cham pion, .60 size Scout, and the .50 size Junior. Sorry, Vince, No. 19 OLD TIMER F/F GAS I don't have a picture of you! No. 19 OLD TIMER RUBBER/TOWLINE (As a point of interest, a friend of mine just back from Germany reports seeing a brand No. 19 OLD TIMER FLYING SCALE A through K new Robbe/Schluter machine called the No. 19 OLD TIMER FLYING SCALE L through Z "M agic," a ful ly aerobatic helicopter said to New plans prices effective Jan. 1989 to Dec. 1989 be as good as or possibly even better than the Cham pion. Stay tuned to this colum n for P.O.Box 90310 more details.) San Jose, Calif. 95109-3310 Kalt helicopters were showcased at the Phone (408) 292-3382 (Tues. or Fri.) Hobby Dynam ics booth. The superb $1200 Kalt Jet Stream Jet Ranger helicopter was the slickest helicopter at the show. It has one of the smoothest tail rotor pitch control and How Do You Get Longer Run Times main rotor gear transmission systems. Frank Dyke says the 62-inch diameter Jet Stream cruises at about 65 mph. A friend of mine & Higher RPM's with Less Weight? saw Dan Melnik's Jet Stream fly at the Tan­ gerine contest, and he vouches that it's fast A. NOVAK Speed Controls. and smooth. For the sport fliers, Kalt offers the very economical Cyclone for less than Novak Electronics wants to introduce to the $300.1 think this is the best bargain in town ELECTRIC AIRPLANE MODELER a device which for a 50/60 size collective pitch sports every serious car racer in the world knows helicopter. The Cyclone, Baron 28, and Ba­ about... ron MX are the only helicopters sold in the MOSFET Speed Controls. U.S. with a hingeless main rotor. I am a Why use the traditional high power loss me­ strong advocate of the hingeless rotor de­ chanical switch when you can use a fully pro­ sign because there is no slop and it's simple. portional speed control which is better than Beginners can obtain docile characteristics 99% current efficient? You get higher RPM's, by using a soft spring steel plate, and ex­ fully proportional throttle and lower weight (re­ perts can obtain great controllability by places servo, switch, & messy wiring). using a stiff plate. Full-size helicopter in­ Interested? Send for more information. dustries are all moving toward a hingeless main rotor design to reduce mechanical simplicity and cost, and increase life span and controllability. OVER 10 YEARS DEDICATION TO THE RC INDUSTRY Miniature Aircraft was the only major helicopter company that didn't come to the 128-C E. Dyer Road, Santa Ana, CA 92707 ELECTRONICS, INC. show. I guess it would be pretty costly for them to come from Florida. I was looking forward to seeing some of their new fiber­ helicopters. The main rotor system and Flight Simulator by Ambrosia Microcom­ glass blades. As some of you readers may blades account for 8 0 % of the flight dy­ puter Products. I spent 15 minutes doing know, my real job is doing research on full- namic characteristics of any helicopter. hover, nose-in, stall turns and loops on the size helicopter rotors and blades; naturally, O n e of the more fun and interesting prod­ simulator. It is pretty darn realistic. It cap­ I am interested in new blade designs for R/C ucts that I have seen is the R/C Chopper tures 80 to 9 0 % of the feel of flying a real

FULL BODY PILOT KIT DARNED GOOD AIRMEN Contains pilot head, hands, boots, helmet, cap. goggles, full templates and easy instruc­ Lightest pilots available. Lifelike vinyl latex rubber tions Easy to assemble and finish Build as a Sportsman or Barnstormer. Full Body or Bust Some simple sewing required Fully positionable too! B U S T p i l o t KIT JET PILOT KIT Price Contains pilot head, helmet sport cap. goggles #206-% scale 8 9 5 and jacket Easy to assemble and finish Pilot has molded on jel #205-% scale 9.95 Price helmet Contains face mask #204-% scale 10.95 #108-% scale NEW 5.95 and oxygen hose. Extreme­ #203*% scale 16.95 4106- % scale B 95 ly Realistic. Weighs less 4105-% scale 7.95 than Vi oz Price 4104·% scale B 95 #103-% scale 14 95 4308-% scale 5.95 #307-% scale 6 95 B orne s im p le ORDERING INSTRUCTIONS s e w m q See your dealer first or order direct r e q u i r e d Add SI .00 shipping. N.Y.S. residents add 7% tax See Your Dealer or add One - Send check or money order COD'S OK Dollar for direct order handling Send $1.00 for catalog

MAY 1989 99 SUBSCRIBE NOW FEATURING: Construction Articles AND SAVE! Product Reviews Radio Control Yes, start my subscription Peanut Plans 0 to Model Builder! Electric Flight □ New □ Renewal Old Timers N am e______Address______City______S ta te _____ Z ip ______□ $25.00 for one year (12 issues). Over $10.00 off newsstand prices. □ $47.00 for two years (24 issues). Over $23.00 off newsstand prices. M/C or Visa # (Add 5% ) ______Expiration D a te ______Signature ______$38.00 for one year (includes postage), outside U.S. including Mexico and Canada. For two years (24 issues) send $68.00. ALL PAYMENTS MUST BE IN U.S. FUNDS DRAWN ON A U.S. BANK MODEL BUILDER 898 W. 16th St., Newport Beach, CA 92663 WORLD’S MOST COMPLETE MODEL AIRCRAFT PUBLICATION

R/C helicopter. The package comes with trickle down the results of our research to Dear John: software and hardware and a modified the public so everyone can benefit. Well, I use Charmin and I always wad it Futaba two-stick transmitter ready for use In Decem ber 1988, my test pilot M ike into a ball, so I imagine that some of both on any Atari computer. Besides helicopters, Johnson and our work team went to the the rough side and the smooth side are it does R/C airplane simulation, too. (I California desert to prepare fora speed trial. applied. thought only real R/C vehicles can be un­ Due to an unknown failure, he managed to Jake derpowered, but these computer simulator center punch the only two-foot-square con­ * * * helicopters and fixed-wing aircraft seem to crete spot in the M ojave desert. Needless to D ear lake: be underpowered too. W ithout sufficient say, the Champion was demolished. The re­ The instructions for my new Enya 35 RJC forward speed, the simulator helicopter can ceiver and servos were like shrapnel, ex­ say that I should be sure to use a glow plug actually stall at the top of a loop.) I forgot to ploded into pieces. Even the engine crank­ with an idle bar. What’s an idle bar? ask if this helicopter simulator has an invert case on the O.S. .60 Long Stroke exploded. left in Gladwin, Michigan switch for practicing inverted flight. Dave W e had the video camera rolling through­ Dear Jeff: Brown has a similar flight simulator for IBM out the flight test; when we decided to stop An idle bar is a tavern for the PCs. rolling the video, it crashed. By the way, the unemployed. Hobby Lobby was at the show displaying existing speed record is 8 6 mph. W e Jake the British MFA 500 fixed-pitch beginner's clocked a stock, Magna Pipe equipped X- * * * helicopter. Fixed-pitch helicopters can be Cell through our timing gate at only 57 an inexpensive way to get started in R/C mph. So, if you are thinking of conquering D e ar lake: helicopters. I learned on the vintage the speed record, brute horsepower will not D o you agree that in order to foster the Schluter Heli-Baby and American Revolu­ do it. You need to improve aerodynam ic ef­ American economy, we should boycott tion 1 in 1976.1 have also enjoyed flying my ficiency. Stay tuned for more details. · Japanese model products? little G M P Cricket in front of my garage. Conservative in Concord, NH And, they were all very manageable with­ Dear Conservative: Ja k e ...... Continued from page 7 out a yaw rate gyro or a specialized heli ra­ No, but I firmly believe that we shouldn't dio. Maybe the simple fixed-pitch helicop­ that's an area where I can really help. buy any Japanese lettuce or grapes. ters will be popular among the beginners Jake Jake again. * * * * * * Next month I will go into some heavy D ear lake: D e ar lake: stuff and explain the theory of two- bladed Help! I don't know how to use tissue Do you know what an aximoron is? It's rotor systems. I will also periodically brief paper. Bill Warner of the "Hey Kid" series when two totally incompatible words are you on the the status of our project to im­ says to apply it with the smooth side up and combined to form a common phrase. The prove the top speed and m aneuverability of P h il Hartm an o f Blu e Ridge M od els says ap­ phrase makes sense, but the two individual our R/C World Speed Record attempt ply it with the rough side up. What side do words taken together are ridiculous, helicopter. Since I am not in the model you use? "lumbo shrimp" is a good example. Every­ manufacturing business, I would like to lohn of Conifer, Colorado body knows what a jumbo shrimp is, but

100 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER M ic r o - C u t Quality W o o d s

TYus * λ features a com pete and fe®) tMviswafed step-by step construction manua\ W D- <νΑ'·»« plans that A S S W E . S U C C E S S '.

- r 1

Whether you're a beginner or an expert modeler, when you choose a model kit. you want a quality kit that you can build with confidence. When you choose a Midwest Success Series® kit. your confidence starts the minute you open the box. Every Success Series kit is made from Micro-Cut Quality® wood that has been carefully inspected, graded and cut to insure a perfect fit. The plans are rolled, not folded. And the Success Series Construction Manual is a complete, illustrated, step-by-step manual written in a clear, easy-to-follow format that makes building a truly enjoyable experience. Whatever your level of expertise, when you choose

Midwest Success Series kits, you're sure to find a model that's right for you. Midwest offers model airplane kits from trainers to high-perfor­ mance models, and wood boat model kits in everything from display kits to radio-controlled scale models. Visit your local hobby shop today and ask to see Midwest Success Series kits. Or, if you prefer, fill out the coupon below and receive a copy of our NEW 1989 Micro-Cut Quality® Woods and Wood Model Kits Catalog. Midwest Success Series kits - their quality is YOUR success!

| An Invitation----- I#0 S i To receive your personal copy of the 1989 Micro-Cut Quality® Woods ^nd Wood M ^ Kits Catalog. This 16 page, full color catalog will show you all of our lat® f : 1st I Cut Quality Woods and accessories. Please enclose S2.00 for your copy a class mail).

N a m e :. V MIDWEST Address: PRODUCTS CO., INC.

400S. Indiana St. · P.O. Bo* 564 · Hobart. IN 46342 · (219) 942-1134 Z ip :______Phone: ( «9-88 183 *1988. Midwest Products Co.. Inc. 22) Insert the inner parts of the Gold-N- Rods and hook up the controls to the servos and their respective control surfaces. A "2 " r s l bend is a simple and positive way to hook up to the servos, and a metal clevis, large nylon snap clevis or a ball link can be used at the control horn. The ‘super’ systems 23) Install the engine, fuel tank, battery Maneuver, mix, adjust, pack, receiver and switch harness (mount reverse and monitor. this on the side opposite the exhaust) and connect the servos and all other wiring. Be We introduced expo rates! sure to mount the fuel tank, receiver and Three, six and eight channels battery in at least 1/2 inch of foam rubber. A ball link is especially helpful to insure a “STILL THE BEST!" friction-free hookup when connecting the cMILLCOTT throttle control to the engine carburetor Millcott Corporation arm. 177-F Riverside Ave. Newport Beach CA 92663 24) Install thetailwheel bracket and 1/16- inch wire tailwheel assembly using brass tubing, then glue the balsa tailpost block WE SET THE PACE! over the tubing. Michigan's most complete supplier of Note: The upper part of the tailwheel model kits & accessories—if it’s tiller rides freely in the small piece of brass featured in Model Builder Magazine tubing glued to a concave area in the lower we probably carry it in stock. rear of the rudder, so that rudder movement Wa love to help beginners as wall also provides tailwheel steering. This area as the dyed-in-the-wool enthusiasts. should be free of covering to insure a good Give us a try! glue joint. M EM BER 25) Install the two forward hardwood Radio Control wing mounting blocks in F-5 and the rear Hobby Trade mounting block in F-7. Don’t drill the holes Association for the w ing hold-down bolts yet. BUILD YOUR J®E5 26) Fuelproof the engine and tank com­ partments with epoxy or polyester resin 7845 Wyoming · Dearborn. Ml 48126 · (313) 833-6567 (dope doesn't do a good job). Epoxy costs DWN ROCKET 17900 E. 10 M ila Rd. · E. Detroit. Ml 48021 · (313) 773-8294 more but polyester stinks and tends to be 35203 Grand River · Farmington, Ml 48024 · (313) 477-6266 somewhat brittle. MOTORS! 105 & Livemois · Rochester. Ml 48063 · (313) 651-6842 WE CAN SHOW YOU HOW! FINAL ASSEMBLY 1) Although we normally prefer some­ how can it be both at the same time? "M ili­ thing stronger like dacron, ceconite or a • 40 POUNDS tary intelligence" is another classic exam­ polyester for covering a BIG Bird, a plastic ple of something that can't be. "Honest iron-on would be suitable in this case be­ THRUST! cause it is lighter and faster. politician" must be in clu d e d as w ell. • 50C EACH! I would like to suggest to you that "Dear Cover the Hen with contrasting colors, lake" is an aximoron. In my experience, no particularly on top of the wing and the • With a rock tumbler and some simple hand tcols one has ever used "dear" as a descriptor for horizontal stab. Remember, if you have w ell show you how to build YOUR OWN rocket trouble seeing your bird and telling what it's engines m youi own garage or workshop tor 1/5 to you. Therefore, since "dear" and "lake" are 1/10 the cost ol the commercially marketed motors totally inappropriately combined in the doing, then you're gonna have trouble con­ • INTERESTED? Just send us $2 00 and we II mail you phrase "Dear lake," it must be an aximoron. trolling it. (Betcha didn't know that red-and- our biochure along w ith a WORKING SAMPLE of an white airplanes fly better.) electric igniter that YOU CAN MAKE YOURSELF Irom A minor revision to something like "Damn inatenals you II lind around the house lake" would eliminate the incompatibility 2) Glue the tail section in place on the TELLi YOUR FRIENOS ABOUT USf Were the 00 IT 1/8 -inch balsa stab seat at the rear of the an d solve the problem . YOURSELF ROCKET people ■ By the way, aximorons are not always fuselage, being careful to align the fin with Write to: Department MSS The Teleflite Corporation limited to just two words. "Sound advice the center of the fuselage. 11620 Kitching St., Moreno Valley, CA 92387-9978 from lake" would be an excellent example 3) Place the wing on the fuselage cabin of a longer one. top over formers F-4 to F-7. Square up the Grammarian in Great Neck wing so it's in alignment with the horizontal Dear Gramm arian: stab and the fuselage. P.A.W. DIESELS Thank you. Hey, how about that?! There’s 4) Hold the w ing in place and mark the hole locations on the hardwood mounting •049 t o -35, RC&STD another pai r of words that don’t go together, at least not in this case. blocks where the screws will go. An easy way to do this is to rub soft lead (a # 2 pencil) Jake · SEND S1 FOR LISTS & on the bottom of the 1/4-inch nylon bolts. W h en shoved through the holes in the wing Sage H en...... Continued from page 19 USEFUL DIESEL INFO. and rotated while being pressed down ERIC CLUTT0N, ment. Use four #2x1/2-inch screws to se­ against the mounting blocks, the bolts will cure the hatch in place. 913 CEDAR LANE, leave an accurate mark for drilling. 20) Fabricate the landing gear (aluminum 5) Remove the w ing from the fuselage. TULLAHOMA, TN.37388 or fiberglass landing gear blanks can also Drill three holes where marked on the DAVIES-CHARLTON DIESELS! be used) and install. Use four landing gear hold-down blocks with #7 bit. Use a drill straps and eight #4x3/4-inch screws for press if possible to keep the holes vertical. NEW PRODUCTION! securing the landing gear in place. 6 ) Tap the holes with a 1 /4 -2 0 tap. Then DART .03 EXCELLENT 21) Install the servos. Hardwood rails apply thin Hot Stuff or other CA to the MERLIN .045 QUALITY. glued in between the fuselage sides work holes. W h e n dry, retap. This w ill greatly SPITFIRE .06 ENGLISH well as a servo tray, or cut a tray out of 1/8 or strengthen the threads in the holes and al­ SABRE .09 MADE. 3/16 ply. low a more secure mounting.

102 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER SECOND ANNUAL

V May 13 and 14,1989 Trade Only Day, Friday, May 12, 1989 i MODEL SPORT & HOBBY SHOW!

• LIVE INDOOR RADIO CONTROL MODEL FLYING DEMONSTRATIONS* • HUGE BOAT POND & CAR TRACK · SWAP SHOP · GIANT RAFFLE Following up on the highly successful introductory show in the great Southeast. The IMS show, where 1988 Model Sport & Hobby Show in Atlanta, Georgia, selling by exhibitors is permitted, continues to be IMS is once again bringing major model manufac­ presented by, and for, the model hobbyist. Y'all come turers from all over the U.S. for its second annual on by, ya hear! See the latest products and visit with major manufacturers and distributors of: * Radio Controlled Model Aircraft, Boats, and Cars #- R/C Systems #· Model Railroads * Modeling Accessories *FREE STATIC MODEL DISPLAY COMPETITION IN MANY CATEGORIES* (Send legal size S A S E to IM S office for list of categories, competition rules, and advance entry forms)

Bring your children, so they can learn to build and fly a HEY MOM! a model airplane, FREE, during the show!______^ IT’S YOUR * GEORGIA WORLD CONGRESS CENTER WEEKEND! 285 International Blvd., N.W. Atlanta, GA ATTEND THE SHOW AND SATURDAY, MAY 13, 1989, 10 a.m.-6 p.m. WIN SPECIAL PRIZES. SUNDAY, MAY 14, 1989, 10 a.m.-5 p.m. REGISTER FREE OF CHARGE FOR A DRAWING TO WIN ADMISSION: Adults $5.00, Juniors (12 and under) $3.00 A DIAMOND PENDANT WITH Children under six, FREE when accompanied by an adult. 14-CARAT ADVANCE TICKETS: Save time and waiting in line. Order your GOLD CHAIN! ONE TO tickets in advance. U.S. only. Send check or money order pay­ BE GIVEN AWAY EACH able to IMS, Inc. (Allow 3 weeks for checks to clear), and include DAY; SATURDAY self-addressed legal-size stamped envelope. One adult ticket AND SUNDAY $5.00, 12 and under $3.00 (No charge under age 6 ). ON THIS MOTHER’S * Watch this ad for time and location of outdoor R/C flying demon­ strations, including helicopters and ducted fan aircraft (subject to site DAY availability). WEEK­ END INTERNATIONAL MODELER SHOW INC.

P.O. Box 10127, Costa Mesa, California 92627-0031 Phone: (714) 548-4700 IMPORTANT INSTRUCTIONS: Non-commercial (personal items) rate Is 25 CLASSIFIED ADS cents per word, with a minimum of $3.00. Commercial rate is 40 cents per word, with a minimum of $5.00. No advertising agency discounts allowed. Name and address free, phone number counts as two words, abbreviations count as whole words and will be spelled out. All ads are payable with order, and may be for any consecutive insertion period specified. Send ad payment to: MODEL BUILDER, Classified Ads, 898 W. 16th, Newport Beach, CA 92663.

VACUUM BAGGING SUPPLIES. Rohacell foam, IMPORTED DIESEL ENGINES - WORLD'S HEAVY DUTY HI-START PARACHUTES. Small Kevlar, fiberglass, Safe-T-Poxy and more For free BEST SELECTION: Current production Aurora, $750 plus $1 S&H. large $8.50 plus $1 S&H Air­ catalog, send SASE to: Composite Structures Cipolla, D-C, Enya, KMD, Mikro. MK-17, MVVS, men's Supply Co., PO. Box 1593, Norfolk, Technology. Dept. D3; 3701 Inglewood Ave. # PAW, Pfeffer, Silver Swallow & U SE Diesels. Also Nebraska 68702-1593. 268. Redondo Beach, California 90278. Mills and Taplin Twin replica diesels and very special imported glow engines. $1.00 Catalog. FREE $4.95 SURPRISE GIFT WITH ANY MER­ WANTED RTF u/c Planes from Aurora/K&B. CARLSON ENG INE IMPORTS. 814 E. Marconi, CHANDISE PURCHASE! JEWELRY. PATCHES. Comet, Cox. Gilbert. Sterling. Testors, Wenmac. Phoenix, Arizona 85022. REPLICA S: Own the very first wings, embroi­ etc. Complete or pieces, buy or trade. John dered Royal Flying Corp. 3'/2 inches. $4.95 Hat- Fietze PO Box 593. Lynbrook. New York 11563 ANTIQUE MODEL IGNITION PARTS CATA­ In-The-Ring pin $4.95. The renowned Blue Max; LOG GHQ, Delong. O K . McCoy, others. blue cloisonne Maltese Cross, gold plated ea­ WANTED Ignition model airplane engines and Timers, needle valves, tanks, cylinders, oper­ gles, 2 inch medal, free chain, $12.95 Shipping model race cars made before 1950. Jim Clem, ating instructions, kits Catalog 1988. 1.000 $2.00. WWI to present catalog $1.00 refunda­ 1201 E 10, PO Box 524, Sand Springs. Okla­ Parts, $5.00 pp. Foreign $9.00. Chris Rossbach, ble Company Of Eagles, 875A Island Drive, homa 74063; (918)245-3649 R.D. 1 Queensboro Manor, Box 390. Glovers- Suite 322M, Alameda. California 94501-0425. ville. New York 12078. WANTED: SPARK IGNITION MODEL AIR­ WANTED: Berkeley and Cleveland kits or PLANE engines circa 1930-46 Fair, competi­ CUSTOM EMBROIDERED PATCHES. Your de­ related items: parts, plans, boxes, brochures, tive prices Tom Forsythe, 318-12th Ave., Box sign. made any size shape colors. Five-patch books, ads. radio equipment, accessories, etc. 141. New Glarus, Wisconsin 53574; minimum, guaranteed coforfast. Free brochure Gordon Blume 4649191st Ave S.E., Issaquah, (608)527-2066. Hein Specialties, Inc., Dept. 238, 4202 North Washington 98027. Drake, Chicago, Illinois 60618-1113. Tired of forming props on bottles and cans, with Randolph Butyrate and Nitrate dope Twenty- uncertain results? Try our computer-designed COMPUTER PROGRAM PATTERN MASTER three colors. Three new all-wood control line kits, hardwood prop forms. 3 sizes. Any pitch, from — Use your IBM PIC or compatible to make or plans only. 1950s style kits, complete Scratch- Peanuts to Wakefields To 6" dia. $8.00; 12" cutting patterns for aircraft covering. Program builders supplies Send large 45-cent SASE $10.00; 20" $1500, plus $2.00 shipping and han­ and user guide $24.95; demo version (includes ABC Hobby Supplies, P O Box 2391. Clarks­ dling. E. Wckland, 2412 Tucson Ave, Pensacola, $5 coupon for full version) $500 Chandero ville, Indiana 47131 Florida 32506. Systems 14 Parkview. Long Valley. New Je r­ sey 07853 MODEL BU ILD ER BACK ISSUES; Many issues SCALE DOCUMENTATION: PLAN ENLARG­ in the seventies and eighties Also binders Many WANTED: Hobby Shack's Pilot Kit #100869. ING. Photo packs, three views, drawings for other magazines, all at low prices. Send SASE Stephens Akro 25 size airplane kit. Call Bob at 1600 aircraft. Super Scale R/C plans for Giant. to Wm. L. Waite 520B S E Momingside Dr., Lee's (215) 369-0138 or write to Bob Green. RD #1 Sport 60-page catalog $4.00. Scale Plans and Summit, Missouri 64063. Box 195, Boyertown, Pennsylvania 19512. Photo Service, 3209 Madison Ave., Greens­ boro. North Carolina 27403; (919) 292-5239 Everything from AUTOGIROS to ZAIC BOOKS! SC A LE PLANS: Curtiss, Grumman. Vought. Send $2 for complete catalog of publications, SASE for list. C.F. Smith, Smith Plans, 9043 Fair­ PLANS EN LA RG ED — Large Scale Specialists. plans, cards and more HANNAN'S RUNWAY, way B lv d , Sun Lakes, Arizona 85248. (602) PO Box A. Escondido, California 92025. PC Model Software Free catalog. Concept Tech­ 895-8745 nology, PO. Box 669D, Poway, California 92064. (619) 486-2464 FOR SALE: Thriving Hobby Shop. Good loca­ We stock the complete line of Easy Built kits from tion in quant, unique Texas town. See to appreci­ Canada, rubber gas and electric. Also Dubois, BARGAIN HOBBY SUPPLIES: Everything for ate Call (512) 997-6942 or (512) 997-6740. Deils, Fresno, others. Catalog $1.00. Airmen's Ihe free flight enthusiast Balsa, tools, kits and Supply C o, PO. Box 1593, Norfolk, Nebraska more' Send SA SE to: Discount Hobby Supply, "EASE-OF-FLYING RATINGS of R/C Trainers," 68702-1593. 629-B South Breed St.. Los Angeles. California rates 30 models. $2.00. Jim Waterman. 3818 90023. Deerfield Dr., San Antonio. Texas 78218. ANTIQUE & OLD TIMER PARTIAL KITS also custom 1/4-scale kits, any plans. Send large W W I AND WWII POSTERS. In color, imported INVENTORY REDUCTION—Still have more kits SASE for each pnce list wanted. MC. Visa ac­ from England. 20 x 30. suitable for framing. than I can build. Send large SA SE for new ex­ cepted. Klarich Custom Kits, 2301 Sonata Dr., Sample photos, send $1.00 to Biggin Hill Publ., panded list. Have added R/C kits, sailplane kits Rancho Cordova. California 95670: Box 786-0, Freeport, New York 11520. and many accessories to earlier list. Some (916)635-4588 Quarter Scale engines, kits and accessories. MAKE A BEERC A N BIPLA N E, 9 inches long Robert Hawkins. 1200 E. Calle De La Cabra, with 14-inch wingspan. Instructions, patterns, 1930s M ODEL SHO P! Sawed prop blanks, Tucson, Arizona 85718. photographs. $9.95. Kit Nine PO. Box 72104. WWI/Balloon/Streamline balsa wheels, Hinoki Marietta, Georgia 30007. 4-STROKE ENGINE REBUILDING. OS . Enya. wood, color nitrate sticks, tissue bobbins, prop and Saito $17.50 (singles) plus parts and ship­ hinges, bamboo, old Scale/Contest plans, and ping. 25 years mechanical experience, 4 years more! Illustrated mail order catalog: $2. Oldtimer BARGAIN SALE! Large selection of R/C Scale with 4-strokes Richard Lowry, 2112 W. Olive. Model Supply, PO. Box 7334, Van Nuys, Califor­ British MAP Aircraft and Ship plans. Send SASE Springfield. Missouri 65802; (417)865-1947 nia 91409. for list to Repla-Tech International. 48500 McKen­ zie Hwy., Vida, Oregon 97488. SPECIALIZING IN M AJO R DECALS, also kits NEW! VOLUME 4, PEANUTS & PISTACHIOS! IGNITION AND GLOW EN G IN ES. Collectors, and supplies. For personal service and good Packed with plans, photos & pointers, $550. Still runners, used, new. Sell, trade, buy SASE for prices, send $1.00 for catalog to: Clark's Air- available but going fast, Volume 3 @ $5 and large list. R L. Eierman, 504 Las Posas, Ridg­ crafters Supplies, 501 Raintree Condo's, Mal­ Volume 2 @ $495. Add $1.50 postage and ecrest, California 93555; (619)375-5537. vern. Pennsylvania 19355. packing (one, two or all three books). California orders add applicable sales tax. HANNAN’S RUNWAY, PO BOX A, Escondido, California 3,000+ old MAGAZINES/BOOKS - Model. Avi­ VIDEO TAPE: 1988 U.S. INDOOR CHAMPION­ 92025 SH IPS. filmed at the ETSO Mini-Dome Shows ation Lists: $1.75 and 45c SASE. Vern Clements. all of the events flown, interviews with modelers, 308 Palo Alto Dr.. Caldwell. Idaho 83605 and the newest innovations in modeling. Pro­ U.S. FIGHTER ART! Beautiful line-art prints of fessionally edited, 72 minutes long. Great for 4 exciting American warbirds: P-26A Peashooter, SCALE DOCUMENTATION: Aircraft photos and clubs, teachers, competitors, and to show to non­ P-51D Mustang, F-16 Falcon, Stealth Fighter. photo packs, civil, military, warbirds, etc Detailed modelers. VHS, $25.00 each, includes P&H 1Γχ14". $6.95 each, all 4 for $25.00 Aero- close-ups, nose art, unit badges. Catalog $1.50. Mike Arak, 4200 Aurora St., Suite O. Coral graphics, 7898 E. Acoma, #208, Scottsdale Ar­ AirPhoto. Dept. MB, 3 Leelynn Circle, London­ Gables, Florida 33146. izona 85260. derry, New Hampshire 03053.

104 MODEL BUILDER Ace Radio C ontrol...... 73 INDEX TO ADVERTISERS Novak E lectron ics...... 99 Airtronics. I n c ...... Cover 2 P.A.W. Diesels...... 102 Aero Plans & P arts...... 96 Pacer Tech (Zap)...... 74 Al-Tec Products, Inc...... 68 Galaxie Model Co...... 84 Pacer Tech (Zap) ...... 78 American Jr. Aircraft Co...... 80 High S k y ...... 70 Peck Polymers...... 88 American Sailplane Designs...... 84 Historic Aviation ...... 1 Polk’s Model Craft H obbies...... 98 Applied Design Corp...... 86 Hobby H orn ...... 90 Radio Controlled Models/Ram ...... 68 Astro Flight In c ...... 83 Hobby Lobby International ...... 69 Ragan/Barker G rou p ...... 81 B & D Model Prod ucts...... 86 I.M.S. A tlanta...... 103 Repla-Tech International ...... 107 B & P Associates...... 88 Indoor Model Supply...... 73 Robert Manufacturing...... 96 Badger Air Brush Co...... 74 J'T e c ...... 92 SABO Designs in Paper...... 98 Beemer R/C West Diet. Inc...... 80 Jed’s Shade Canopies...... 105 Satellite City...... 75 Byron O riginals...... 71 Jim Walston Retrieval System s...... 80 Schlueter F/F Models...... 88 Carl Goldberg M o d els...... 97 JM Lupperger Plans...... 76 Sermos R.C. C onnectors...... 64 Champion Model Prod u cts...... 70 Jo e ’s Hobby C e n ters...... 102 Sheldon's Hobbies...... 93 Cheetah Models...... 90 John Pond O i l Plans...... 99 Sig Manufacturing Co. Inc...... 4. 5 Circus Hobbies...... 90 Jomar Prod ucts...... 86 Tatone Products Corp...... 82 Conley Precision Engines, Inc...... 79 K & B Manufacturing...... 96 Team, Inc...... 71 Culpepper Models Inc...... 76 K & S Engineering...... 65 Technopower II, Inc...... 66 Cygnet Software ...... 82 K & W Enterprises...... 82 Teleflite Corporation ...... 102 Dave Brown P rod u cts...... 64 Kustom Kraftors...... 81 Thorpe Engr. (Star Hawk) ...... 87 Davey Systems Corp...... 63 Kyosho Corp...... 95 Tom Dixon ...... 82 DGA D esig n s...... 99 Μ. K. Model Products ...... 89 U.S. Free Flight Championships...... 70 Dick Hanson M od els...... 78 McDaniel R/C. Inc...... 72 United States Indoor Championships...... 84 D oylejet...... 88 Midway Model Com pany...... 96 United States Outdoor Cham pionships...... 106 Dry Ridge Models...... 107 Midwest Products Co. Inc...... 101 Uber Skiver...... 108 Du-Bro Products ...... 77 Millcott Corporation...... 102 Vinylwrite Custom Lettering...... 70 F3E C ontest...... 85 Model Builder Binders...... 107 VL Products...... 72 Fabtronics...... 107 Model Builder Full-Size P la n s...... 106 WPS ...... 70 Flying T. Model Co...... 98 Model Builder Subscriptions...... 100 Walt Mooney P e a n u ts...... 98 Flyline Models. Inc...... 90 Model Covering Company...... 86 Williams Bros...... 69 Futaba In d u stries...... Cover 3 Model Rectifier Corporation...... Cover 4 World E n gin es...... 3 Futaba Industries...... 91 Northrop Flying Wing Contest ...... 94 Yellow Aircraft & Hobby Supply...... 62 G. M. Precision Products...... 76 Northwest Hobby Supply...... 67 Zenith Aviation B o o k s...... 61

7) Install tail bracing. It takes eight brac­ Here's the w ay to do it. In a seated posi­ when balanced close to the 5-inch mark). ing wires, four on top and four on the bot­ tion, hold the wing vertically so one wing This is done with the bird completely as­ tom. Two different types of bracing were tip is resting on the floor while the wing is sembled, ready-to-go, but with the fuel tank used successfully: Jomar's Aramid Cable locked solidly between your legs/knees. empty. Proper balancing is vital and must with DuBro #201 rigging couplers and 2-56 Then twist the upper w ing tip until its trail­ be done in your shop, not at the field where threaded clevises, and turnbuckles (DuBro, ing edge is higher than its leading edge (1/8 wind and peer pressure will guarantee that Proctor or Hobby Lobby) with Berkley Stee- to 3/16-inch) and use your heat gun on both you'll do a lousy job and most probably end lon (20-30 pound test) leader material. sides of that wing tip area. Hold that twist up with a poor flying, if not unsafe, aircraft. Don't forget to safety wire the turnbuckles. until the iron-on plastic covering cools and Here's a simple, effective way to balance. Nylon wire ties make fine lightweight the washout remains. It's very important Install two 1/4-inch #4 sheet metal screws brackets w hen cut into one-inch strips. The that the amount of washout be the same at into the bottom sheeting of the wing center braces should be just taut enough to keep both wing tips. Double check that you have section. Locate these screws so that one is tension on the tail pieces, but not so tight not twisted either wing tip the wrong way. 3-1/2 inches out from the center of the wing that the stab or rudder get warped. 2) The Sage Hen can be safely balanced toward the left tip and the other is 3-1/2 HOMEWORK anywhere between 4 to 5 inches back from inches out from the center to the right tip. 1) The wing tip panels should have the wing's leading edge (she's much more Make sure that both screws are the same washout, w hich means that the wing tips receptive to thermals, but still not tricky, distance (somewhere between 4 to 5 are angled or twisted so that the tip trailing edge is higher than the tip leading edge. This keeps the outer part of the wing flying after the inner section has stalled; it allows JEDS SHADE CAAfOP/ES for tighter turns and lower flight speeds, and 643 S Brookhurat Rd. makes the Hen a veritable pussycat. s j / « r i i y / - y i Futorton, CA 3 2 6 3 3 φ 4 ) 773-9509 4"x8" vacuum former with self-contained heat Rat Roof source. Easily constructed from local materials. Plans $12.00. Complete unit $42.00 postpaid. GRACO MODELS. Box 18358 Kearns, Utah Peak (Hip) Roof 84118. export WANTED: Veco, Johnson. K&B. O S. Max. Su­ per Tiger, Fox. etc. control line engines. Glow or diesels. David Zwolak. 1336 St. Vincent St.. EASY Philadelphia, Pennsylvania 19111. COMPACT STORAGE υ ρ WANTED: Magazines. 1952 Air Progress. De­ *** cember 1954 and August 1955 Flying Models *** John Hannah, 3141 East 54th Avenue, Vancou­ EASY ver, British Columbia. Canada, V5S 1Y9 HEAVY DUTY D O W ft Take GOON;' "BULLDOG." "G E E B E E S," etc. by STEEL FITTINGS It Vern E. Clements, 308 Palo Alto Dr., Caldwell. Idaho 83605. Plans-Catalog-News (NOW 16 *** Anywhere PAGES): $3.00, refundable. EXTRA STRONG R/C SKYDIVER: Free falls, opens chute and One person steers using one servo. Easy to build. Low cost. IkeGALVANIZED STEEL TUBING setup SASE for details Bob Patterson, Box 662MB, St. Croix Falls, Wisconsin 54024. iCal or write for free brochuret

MAY 1989 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 105 NOTICE NEW Full-Size Plan prices are now in effect. Send a long, self addressed envelope for your list of revised plan prices. the bench. Ideally she should hang slightly slightly hang should she Ideally bench. the off bird lift the gently and heads of screw the nose down. nose each under Then, edge. ofyourforefingers tips the place leading the from back inches) 106 M a g a zin e in d u d e · re p rin t o f th e co n e tru c tlo n e r tlc l· . If b o id - - id o b . If . e l· id tlc t r v e n e tlo th c f o tru e rl n e co p e ro th f s o w t · rin n p tio re c · tru e s d u In d g in m e zin a g a M ue Ad o rdtcr res Califor­ C a­ n orders. sig card and credit to date, % 5 Add include expiration isa ture. V or number, astercard card M C.O.D.'s. or cash a ad an C es d han­ clu (in and orders shipping for verseas O order total dling. of % 0 2 nia residents add 6 % sa le s tax. s le sa % 6 add residents nia or rder O oney it M Rem order. total International of by % 0 ent 5 paym add exico) M and U .S. funds, drawn on U .S. bank. P le a s e , no no , e s a le P bank. .S. U on drawn funds, .S. U add , O P F and O P A including orders, .S. U 82 / GI OH $25.00 MOTH Y S IP G 1/3 2892 α Ν $6.50 $12.00 R E F 0 T S R E P U S 3489-O.T. α Ν $7.50 D IR B Y T T E R P 34891 α Ν E T ET IN B A C . .E G 589-0.T. α Ν 18-.. GLI $7.50 $10.00 R E ID L $25.00 G C S S A L C 11881-O.T. α Ν P IS H W E H T $7.50 11881 α Ν F F U G R/C 12881 α Ν $23.00 Y $10.00 R E IS M ’L U 1891-O.T. α Ν E N A L IP B M REA YD A D 1891 α Ν $10.00 T R E L A 289-0.T. α Ν 3202 D R 0 N 2891 α Ν $21.50 EN H E G SA S U 0 G N 0 M U H 5891 α Ν 08 HAWKE CANE $17.00 E N A IC R R U H ER K W A H 10881 α Ν r o rn hr noblne y moving by balance into her bring to Try M ane n la p e u S M u F AM W. h St Newport CA 3 6 6 2 9 A C . h c a e B t r o p w e N . t S th 8 1 . W 6 9 8 D N E S with 50" span. By Cohen & Worth.& Cohen By with span. 50" interesting pod-modelAnfuselage from '42 4-stroke.Benjamin.span. 60" A big, easy-flying sport scale designed for a .65 byNorthrop. Bill Ten-foot span. to.25 power,by Ted Schreyer. Tellez. Jose By model.span. 34" The ultimate R/C trainer. 84" Big span. .40-.45 A control line sport scale for .30 to .40 engines, A Weathers Joe classic glider design from Fly­ park flying. 49-inchTank. J. By span. orforgliderslope launch hand R/C Simple now in Smithsonian.Good. Walt Pioneer R/C aircraft, won '38. '39. '40. '47 Nats, LaTorre,Michael by from design '42Dec. pylon A.T. B/C 53" competitiveVery blownPlans up from original 1/4-scale design model Scale of primaryFrench trainer,for .19 Half-A 1939 ofHaroldversionStofer’s pylon for ship R/C sport lightly built 58" Simple, nally powered by Atom 09.Ehling. Frank ship cabin Cute from36" 1942 origi­ M.A.N., Al and power.Alman. Edwards Bruce made of cardboard!C.Felton. ing1939. Aces, is 30inches.Wingspan .40-.48 four-strokes.Alex McLeod. E ODRN INSTRUCTIONS ORDERING NEW iiu re: $10.00 order: Minimum BUILDER TO: TO: # L E D O M L LDER PLANS S CE IC V R SE S N A L P R E D IL U B EL O O M ch—d fom m fro d — h rc o p L L R E ILD U B EL D O M

dead weight (like lead) only as a last resort. last a as only lead) (like weight dead to going consider help, doesn't still around edge is higher than the trailing edge) than than edge) trailing the than higher is edge a heavier (1200 mAh) battery pack. Add Add pack. battery mAh) (1200 heavier a equipment If shifting receiver. or battery the thrust line offset. . .and Ernst has engine engine has Ernst .and . offset. line thrust not is wing the that sure very ake if neces­ M ing sary. w the Shim stab. horizontal the leading (the positive more degree one and pounds. prototypes came in between between in came prototypes three All screw­ lead. of than pieces in sense gluing and/or ing more make would fuelproofing resin of two or coat extra an fact, In and right thrust. Use the Robart meter to to meter Robart the Use down thrust. both right of degrees and 3 to you needed the allow in ill set w plates tapered These engine job. its with best flies Hen Sage the zero between is incidence ing w the that center of the firewall. the of center hesi K. O is wheels check these thrust settings. thrust these check this for perfect are that plates thrust mount stab. the to negative dual rates, set low for for low set rates, dual the on and fin stab The the to fuselage. vertical and be should wing the and stab, horizontal between and ing w the between reference line between the tail and the the and tail the between line reference ground and tooling around. tooling and ground in either direction is necessary. If you have have you If necessary. is direction either in 3/4-inch. . . and use low once you're off the off the you're once low use . . and 3/4-inch. 4) Like most every other sport-type flyer, sport-type other every most Like 4) check meter incidence Robart a ith W 3) hs id os' ne mc rde for rudder much need doesn't bird This 6 5) Double check for perfect alignment alignment perfect for check Double 5) ) udrtrw n mr ta 3/4-inch than more no throw: Rudder 7) P ORS SO N SPO OMS 57 SAM NFFS FAC FAC ) A little toe-in (2-3 degrees) on the the on degrees) (2-3 toe-in little A ) MID - AMERICA AIR CENTER CENTER -AIR MID AMERICA JUNE 19-23.1989 JUNE CHAMPIONSHIPS AMA &NOST AMA SENOSASETO: R IL 53005 l W , FIELD K O BRO SAM USIC,1655 REVERE DR. DR. REVERE USIC,1655 BLO O M FIELD , IN 47424 47424 FAC IN , 568 FIELD X M O O B BLO .RR5, CHTJEN SA DON RE A 16506 PA LN. Y ERIE, D CIN 3301 REICHEL, LIN 21EVENTSSAM EVENTS 25 AMATYPE UNITED STATES 6 FACEVENTS 6 NOSTALGIAEVENTS LAWRENCEVILLE, IL. LAWRENCEVILLE, OUTDOOR 1 / 2 -inch and high for high and -inch 7-1/2 and and 8 8 effective turns and small movements w ill ill w movements small and turns effective that channel. (O lder sets won't have revers­ have won't sets lder (O channel. that by corrected be can movement wrong ny A give ill w running this Also, characteristics. of elevator when flairing for a landing. a for flairing when elevator of ficult to do but does take a little extra time time extra right. little it a get to take does but do dif­ isnot to This ficult desired. hen cut w off to left engine trim the throttle enough is there that and idle, or high at either bind doesn't servo optimum the at arrive to needed be should adjust­ small a only point this At field. the help to m inim ize overcontrolling both on on both air. the in and overcontrolling ground the ize inim m to help and reverse both the motor and pot connec­ pot and motor the both reverse and op­ an obtain servo, the of side opposite the in­ when plane. idle the in best stalled approximate for barrel carburetor the set to where idea handling good its a you with familiar e becom you've are not the same. Som e are range checked checked range are e Som same. the not are be­ directly stand to best it's so direction, b a la n c e d s e v e re ly nose-heavy, you you nose-heavy, out running ly about re e worry v to e s have shouldn't d e c n la a b idle setting. A lso make sure that the throttle throttle the that sure make lso A setting. idle servo throttle or control throttle of the ment tions yourself.) tions servo the into go or servo, rotation posite to connection rod control the route to have run test and Hen Sage that so stand test a on so or hour an least or damage to property by being impatient impatient being by property to damage or fly don't and/or range, humming, or jittery are servos mended your recom the get don't require­ antenna the from know to collapsed, removed Get case. antenna the pletely the com some with out, some antenna and section the antenna with first the with radios it. All with e cam that instructions the forward. stick that advanced pushing be by don't should And this. throttle the doing that forget hen w surface bird your control hind checking when up screw ih o 38ic. ls te id is bird the nless U 3/8-inch. and 1/4-inch for for low you If set high rates, down. dual and have up 3/8-inch than more ing switches, so in these cases you'll either either you'll cases these in so for switches, ing switch reverse transmitter's the using elevator. up gives stick back that and rudder the in it reinstall stand, test the on proval ol yed lot wie h ual on- usable the ice tw almost pack yield mAh 900 would or 800 an However, trainer. for suitable be would radio your with e cam unsafe. and If you be. should range expected inimum m that your H en flies flies en H your that best The choice. excellent an be four-stroker would size 50 to 40 any so 45's, Saito weight. additional uch m without time IG B loaded lightly flying, slow this in that use pack mAh 500 standard the balance, others to injury possible and plane don't and risk your prudent Be why. out find you until the what and set specific your for ments eeae atr n n megny n that and ergency em an in faster celerate prop to start with would be something like a like something be would to start with prop 24 1x, 34 ra 14x4. a 13x4 or 12x5, 12x4, 10) After the engine meets with your ap­ your with meets engine the 10) After at for run been have should engine The 9) 8 11) M ake sure that right stick gives right right gives stick right that sure 11) ake M 12) Range check your radio according to to according radio your check Range 12) 13) If no extra weight is needed for for needed is weight extra no If 13) es etim som pilots ced erien p ex Even These large, low pitch props w ill insure insure ill w props pitch low large, These with well flew prototypes three ll A 14) ) Elevator throw: you really don't need need don't really you throw: Elevator ) lwly, slow MODEL BUILDER MODEL before ht h'l ac­ she'll that going out to to out going your idle w ill be enhanced due to flywheel The Only Way to Fly effect. Also, at idle a larger prop acts like a Fabtronlc* Mark 3 C.D.I polntlaaa aystam solid disc, slowing the bird down and al­ lowing a more positive and controlled de­ COVERUP! scent . . . and with a large prop on a four- stroker or diesel, you're talkin' real Sturdy, high quality, rich dark Q-U-l-E-T. green vinyl-covered binders for Please don't stick anything bigger or your valued copies of MODEL more powerful than a four-stroke 50 on this BUILDER Magazine. Gold lettering bird. M ore power isn't needed and w ill, in on spine and front cover. fact, be too much for this gentle and easy- Works Great for Most to-fly very basic trainer. 2 and 4 Cycle engines FLYING Autom atic Spark Control now available fo r moat 4 cycle angina». You're really gonna fall in love with the Sage Hen. Besides being docile and inher­ Complala Syatem (Laaa B atteries)...... S69.95 ently stable (if you get in trouble just let go (add 43 poet. & Hand.) of the stick and she'll right herself), she's FABTRONICS 375 Royal· Rd., Galaaburg, IL 61401 also a very graceful looking bird in spite of Isle all those square corners. And don't let her being a taildragger scare you. She handles very well. Just don't rush your takeoffs. In addition to minimum rud­ ★ SC A LE ★ der throw and toe-in, coming up slowly to DOCUMENTATION about 25-30% throttle and letting her stabi­ DRAWINGS-PLANS- PHOTOS-BOOKS lize at that power setting for a few seconds will allow you to maintain control. Then, as you ease her up to full power, concentrate One Binder...... $6.95 on steering straight down the runway. Don't skimp on the amount of runway used for Three Binders...... $17.95 takeoff. Let the Hen build up a good head of Five Binders...... $27.95 steam and a slight nudge of back stick will (For more tnan 5, include have her clim bing out at a safe and realistic $5.00 for each additional attitude. Stay on that takeoff heading until binder.) you're at least 1 00 feet high, and then make your left or right turn out of the traffic area. Shipping: Binders shipped in U.S. by You're gonna find that most every turn re­ 1 9 8 8 U P S only. For one binder, add $2.25. quires some up elevator in order to keep the AIRCRA i-i assoc mckenzie hw y . For each additional binder add 75

MAY 1989 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 107 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: silver, blue, red, green, gold, black, & violet. • Precision, Instrument-Quality Materials Complete set in fitted hardwood case: includes • Strong-Holding Advanced Collet Design uber Skiver, together with two vials containing • Non-Rolling Hex Cross-Section four No. 11, and one each of Nos. 10, 12, 15, and 2 0 ...... S16.95 • Deeply Knurled, Non-Slip Grip Individual handles (specify color) $6.95 • Long-Life, Stainless, Vial of 6 blades (No. 10, 11, or 15) $4.00 Surgical Steel Blades (No. 12 or 20) $4.00 See your dealer, or order direct. Orders are shipped 20 First Class in the U.S. Add 10% o f total order. For FO R V ISA OR M A STER C A RD O RD ERS, ADD 5%. J}? overseas air mail, including Canada & Mexico, add 50% of total order. Remit by International Money Order or U.S. funds drawn on a U.S. bank. Postage MODEL BUILDER PRODUCTS is paid on APO and FPO orders. Calif, residents add 898 W. 16th St, Newport Beach, California 92663 6% sales tax. Dealer inquiries invited. THE ATTACK 4NBL 4X 4 ATTACK Our newest 4 channel system There's even a surface Attack has something for everyone. In fact, 4NBL system on 75MHz. Supplied the Attack 4NBL is such a versatile with three S148 servos and R114H re­ performer we’ve customized it for all ceiver, this ground and sea outfit has kinds of radio control fun.

ATTACK ELECTRIC The 4NBL/MCR system is destined receiver and a MOSFET speed con­ to become a favorite with electric flyers. trol into one very compact, very light This Attack system comes complete and very efficient package. It also with our new MCR-4A integrated re- incorporates BEC to eliminate the ceiver/speed control. This remarkable need for, and extra weight of, a re­ device incorporated a four channel ceiver battery.

The ergonomically designed T4NBL transmitter SILENT ATTACK features comfort contoured case and adjustable There’s a 4NBL system for sail­ length control sticks. plane flyers, too. With the Attack glider what it takes for gearbox-equipped package you get a pair of S133 servos, 4x4's and RC boats. R114H four channel receiver and a No matter which 4NBL system you 250mAh NiCd pack. Again, when size choose, you’ll also get our new four and weight of the airborne package is channel Attack transmitter. critical, Attack is the answer. Loaded with extras like adjustable Hooked up with stick gimbals, servo reverse switches a p a ir ol S133 micro Transmitter/T4NBL servos, this system is and a rechargeable NiCd pack, the perfect lor electrics RECEIVER SERVOS BATTERY FREQUENCY TYPE T4NBL transmitter also features a like our HlrobolFutaba M C R -4A S 133(2) BEC 72M H z E le ctrics

Professor. R114H S133<2) N R -4K 72M H z S a ilplanes comfort contoured case and neck- R114H S148(3) D ry C ase 72M H z A ircraft strap for fatigue free operation. R114H S148<3) D ry C a se 75M H z Truck/B oal

ARF ATTACK Looking for the perfect system for ARF and conventional sport aircraft? Once again, it’s Attack to the rescue The UCR-4A lour channel receiver/MOSFET speed Futaba with a high value package including control weighs Just 1.5 oz. and can easily handle Futaba Corporation of America 280 to 540 size electric motors. 1.24' x 2.92" * 0.63: R114H receiver and three S148 servos. 5 5 5 West Victoria Street, Compton, CA 90220

©198S Futaba Corp. Steer clear The Clod Buster. The monster 4-wheel drive, 4-WHEEL STEERING R/C pickup from MRC-Tamiya.

The first thing that catches your eye them in your dust. Add new excite­ axles both in front and rear. Then we are those mammoth tires. Any R/C ment to your driving. Almost nothing damped it with not four but eight heavy truck that sits on tires nearly 6Vs" high will stand in your way. duty coil spring shock units. If you like, will attract your attention. 4-wheel steering...a new direction upgrade them later to oil-filled units. But the second thing...the most in R/C The Clod Buster’s engineering exciting thing to hit R/C yet...is the You might expect a huge truck like uprights are also super heavy duty, steering system. Four wheel steering. this to be a little clumsy in the tight measuring more than a full 1V2" in And only Tamiya has the guts and spots, right? Wrong!The all new four diameter. Now that’s tough. foresight to bring this technology to wheel steering lets the Clod Buster See the 4-Wheel Steering Clod you now. navigate the narrowest ditches, Buster at your hobby shop, now... Now, 4 x 4 x 4 .4-wheel drive...and squeeze around fallen trees, and let the competition steer clear. 4-wheel steering maneuver on just about any terrain... Never before could you get so wet or dry. many advanced features in one Heavy duty suspension package. Like dual motors for turf­ We’ve complemented this tearing power. Motors that can be Model Rectifier Corporation sophisticated new steering system 2500 Woodbridge Avenue switched to run in parallel for power with a rugged link-style single trailing Ed ison , N J 08817 climbing...orinaseries for endurance arm suspension, (This is no illusion. It's driving. These motors are no babies, with rigid ------_ an actual photo of the either. Our 540 type motors alone set Clod Buster climbing records for speed and torque. So over I 10 scale otl-road cars. Note the size imagine harnessing two of these difference.) brutes together! Each / jT* motor powers a set of wheels shod with huge, crusher tires. So g · now you can run over ιλ\ even the largest yS obstacles, or crush V