Celebr tion building charaot 22 STITS PLAYBOY 1/3 SCALE 88 J-3 CUB 1/5 SCALE 85 About Engine Intake Noise Ive read numerous articles letters re cently model aircraft noise think James Wilsons article Gopher Canyon August issue formative Ive come across Theres lot said about propeller noise airframe noise exhaust noise far Ive read nothing about intake noise know insignificant Any has ridden two-stroke motorcy cle air cleaner/silencer removed knows Have noticed that charts showing Continued page 8 Goodbye THIS iS MY LAST ISSUE am retiring after being publisher maga zine 16 years last 10 also editor Putting out magazine month has lot work what will remember will pleasant associations have readers authors con tributing editors AMA officers AMA HO personnel especially mem bers magazine staff Without question some finest people world can hope magazine has contributed some way readers enjoyment airplane model ing during tenure has goal am retiring Its simply mat ter conditions right Im exactly spring chicken No pushing out giving problem leaving totally friendly fact provided manage ment substantial advance notice intentions could work toward orderly transition Ross McMullen long role sociate editor will charge upon departure expect will continue make improvements maga zine has support Carl R Wheeley 6 Model Aviation ditor letters will carefully considered general Interest used Send Model AviatIon 1810 Samuel Morse Dr Reston VA 22090 STINSON SR-B 1/5 SCALE 100 PILATUS PORTER GIANT SCALE 98 WACO 10PIPER SUPER CUB 1/5 SCALE 731/4 SCALE 107 MONOCOUPE 90ACORBEN SUPER ACE 1/4 SCALE 96114 SCALE 80 TAYLORCRAFTCURTISS ROBIN CHALLENGER GIANT SCALE 901/5 SCALE 98 Davey Systems 3 REAT SPORT-SCALE IPES Designed 40-60 two-cycle 60-90 four-cycle engines 40-size electric motors three feature box type construction extensive prefabrication quick assembly Also included full size plans step-by-step instruc tions hardware preformed bolt-on landing gear bolt-on wings prepackaged small parts STAMPE SV4 famous French aeroba tic primary trainer Preformed welded wire wing cabane vacuum formed cowl 56 span 1000 sq area 61h 7 lb flying weight GREAT LAKES SPECIAL beautiful rendition classic aerobatic biplane preformed wire cabane struts vacuum formed cowl wheel pants precut tail feathers 53 top 48 bottom wing 798 sq area 6 61/2 lb flying weight STEARMAN 75 PT-17/N25-3 gorgeous copy famous trainer crop sprayer aerobatic show stopper Preformed wire cabane struts precut tail feathers 51 top 48 bottom wings 750 sq area 6 6/2 lb flying weight IPAVEY675 TOWER LANE YSTEMSWEST CUES TER PA 1930 oRPORATIoN 215-430-8645 noise levels different quadrants around model indicate highest noise levels straight ahead exhaust usually points rear Propeller noise ra diates tips Perhaps has sumed noise front pro peller think bears re-examina tion propeller noise such big factor Electrics run similar speeds glow engines similar props much quieter Editor Testing North Carolina State University did agree See four-part report De cember 1989 though March 1990 issues think time intake noise con sidered approaches reduce ex amined case front-intake engines wont simple matter Rear-intake de signs should lend themselves some pretty interesting ideas Testing should done first comparing front- rear-intake engines similar size power output same prop same rpm Chart noise level distri bution around see distribu tion significantly different differ ence noticeable examination jus tified Perhaps engine manufac turers importers would willing such testing make findings avail able consider hope provides food thought someone can something about Gosh knows need info can get about make sport acceptable greatest numbers Rick Murray Portland OR Searching memory recall Tore Paulsen Norway using carbu retor muffler front-intake engine way back 1977 RC Aerobatics World Championships Springfield OH aircraft noticeably quieter others year much good ef fect attributable carburetor muf fler can guessed expect Paulsen good handle pects model aircraft sound Maule M-5 am pleased submit photos Quar ter Scale RC aircraft STOL Maule M-5 Lunar Rocket Specifications Wingspan 93 fuselage length 72 power Quadra Q35X glow total model weight dry 250 lb covering Oracover radio Futaba Conquest Continued page 10 8 Model Aviation Note readers Bob Kopskls monthly RC Electrics column Due personal reasons Bob temporarily unable answer correspondence timely manner Have patience please resist sending him additional mail re quiring response will com pound problem info will ap pear December 1990 column 0 28 KITS TO CHOOSE FROM /5 SCALE Wing Span72 Wing Area 1530 sq Weight12-l3Ibs Engine75-go 2c 90-12 4c / CONTACT YOUR LOCAL DEALER WACO YMF 1/6 SCALE WingSpan ing Area960 Sq Weight 8 lbs Engine 61 2c 90 4c MADE IN THE USA MAFREE COCKPIT KIT Receive FREE cockpit kit PICA standoff scale model purchased between September 1 1990 November 301990 sending proof-of-purchase PICA postmarked no later December31 1990 Proof-of-purchase end label kit box original bill sale will no exceptions dates offer bill sale must clearly show dealers name address No copies bill sale will accepted Void prohibited law coupon must accompany request NAME ____________________________________________________________[v32][b16231225151000]]LA1fl ESS CALE SIZE ____________ CITY STATE ZIP PICA ENTERPRISES INC NE 188th STREET MIAMIFLORIDA 331800305 935-1436 scratch-built M-5 Model Avia tion plans No 356 $1200 works six months compares 11 months first M-5 first Quarter Scale model am process doing lot ground preflight testing Maule its off wild blue yonder new model handles like first should honey flier Bob McCann Jackson MI Spiral Stability article Spiral Stability Bowl Effect Part 1 September 1990 sue interesting well done ever order misleading should also have titled ilplanes because briefly men tions vertical tail no specific guide its size paramount importance FF powered models gas- rubberpowered follows 1During very steep straight-up climb vertical tail size important item Dihedral essentially no help 2If vertical tail too large Continued page 12 IrTiWBBoxi 063 Lorain Ohio 44055 PhonA 216 282-8354 PEANUT SCALE Piper Vagabond Piper Cub Stinson 125 1924 Farman Outdoor kits . $795 OUTDOOR PEANUT Super SIe. $795 NEW Micro X Hornet P-30. 81395 SPORT SCALE PC-6 Porter Taylor Craft Stinson Voyager Rubber CO Power Kits 8995 SPORT MODELS An Embryo Model 18 Span designed wini beginners experts 8895 HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft$795 True Olde Japanese Tissue 10 3 colors$995 Japanese Tissue 12 6 colors$695 Microfilm *496 Glue- $195 Solvent -*175 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thru 085 .. size $250 3/32 thru 5132 .. size $275 winder 61 Mark 1161 5 Complete Line Brown CO Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage ostage $250 COMPLETE CATALOG 10 Model Aviation U HOBBY FOAM STRIPS Factory DIrect Clubs Serious Enthusiasts CLEARANCE SPECIALS PVC WHITE Super sticky 2 sides mount radios servos switches sand paper tools hundreds other uses Lifetime supply 36 yd roll 1 wide 1/16 thick$ 1595 Club case 10 rolls$12495 NEOPRENE WING seatinggasket highest quality adhesive side 1/B thick wide 13 long 25 pieces 5 club 250 pieces $1995 HOBBY KNIFE Large 6 handle break away blade renews tip 6 times ades case included $350 DISPOSABLE MIXING TRAYS Size 5 square metal wood spatulas epoxies putties etc 1 pkg 6 trays 12 spatulas 3 packages Dealer Inquiries Invited Include $200 postage handling Same price size order New York State Residents add Sales Tax AMP INC PO Box 793 Deer Park NY 11729 Narrow uana u MVY ix vniui MIVIM 1Sticker Servo Reversing much b cx Narrow Band Rx work 1991 20 KHZ spacings available new 72 Freqs I Improved CE-9C Micro Servo $4595I SUPER-MICRO SYSTEM PRICES 72MHZ 12 OH 2 Servos 237 OZ$24495 13 CH 3 Servos 281 OZ$29145 I 4 OH 4 Servos 325 OZ33895 5 OH 4 Servos 326 OZI34995 TX Dual Rates $1500Mixer $3995 ISystem S & H $975___I G-MARKO3RIC&061 RIG PLUS I SPARES ARE NOW IN STOcIK ___I ICATALOG $100 USA $300 Foreign Add Equipment Sales Tax Calif Prices Cash Cards 5% More ViSAII I20% Deposit-COD steep straight climb cannot achieved model will inevitably roll off less steep spiraling climb less altitude achieved larger vertical tail worse will 3 The vertical tail must small enough front fin effect spinning tractor propeller will just slightly overcome produce slight directional instabil ity allowing very steep straight-up climb pusher models cannot climb straight up front finwhich retracts glide 4 The acceptable vertical tail size found field successively cutting away until steep straight climb can achieved Too much cutting away will cause Dutch roll troubleseven violent roll crash right after launching starting guide size just barely large enough produce no hint Dutch roll glide ie numerous hand-launched glide tests FF Scale models often have too large vertical tail small dihedral Free ing hinging rudder portion float freely 450 both directions often ade quate prevent spiral instability deviation scale size Further helpful discussions about sub ject modeler book Mak ing Scale Model Airplanes Fly Air craft Data Box 763576 Dallas TX 75224 William F McCombs Dallas TX Continued page 210 12 Model Aviation TAKE THE HOBBY SHOP HOME WITH YOUE THE 14th ANNUAL RADIO CONTROL BUYERS GUIDE reference guide oil R/C hobbies Browse through guide find items need youll know just what ask favorite hobby shop RADIO CONTROL BUYERS GUIDE lets turn wish list shopping list knowing whats available con plan new projects improve existing projects Price formation also helps odd up just whot plans will cost Look RADIO CONTROL BUYERS GUIDE local hobby shop call 800-446-5489 weekdays 830 500 CST order RADIO CONTROL BUYERS GUIDE supports Academy Model Aeronautics AMA donating $100 copy guide purchase authorize donation AMA mall hobby shop reciept coupon below Kalmbach Order direct using coupon calling 800-446-5489 OSSOO@ O@@@OSSO@@ ... 6 OOO@@OO 66666 Ta order send Dept 0196 RADIO CONTROL BUYERS GUIDE PO Box 1612 WaukeshaWI 53187-1612 VESI Id like order _____ RADIO CONTROL BUYERS GUIDES #12092 $ ______ ent enclosed ge account Name__________________________________________________ Street______________________________________________________[v33][b22021205153010410]] Oily State Zip Country Charge ercard ican Express mm $15 Card#________________________ Exp Date_____________ Signature Include postage handling US $150 canadian foreign add 15% minimum S3 Make payment US funds Wisconsin residents add 5% sales fax Price subject changeDept 0196 S CANNON Phone 18051581-5081 RIO SYSTEMS 2828 cochran st Soite 281 Sim Vailey CA 93065I D/~YSTEMS MADE IN READY TO FLY 1/8 SCALE TOP GUN BULLDOG 149 No except will know ARF Info Orders 914-429-3484 800-628-3484 CAMBRIDGE MODEL AIRCRAFT PO Box 26 Norwood N J 07648 Introducing SABER Wing Span 121 Airfoil SD7037 Obechi Sheeting Completed Fiberglass Fuselage Send 2 stamps copy Catalog showing complete line Multichannel Gliders DODGSON DESIGNS -21230 Damson Road Bothell WA 98021 Phone 206-776-8067 ub off speed mass can also de fensive tool flier takes off oppo nents whole streamer early flight normally has scramble remaining time trying avoid giving away bunch cuts situation flier has Soviet-style model has option just whacking other guys plane flier already 100 points up cut other guy probably will lose lots time ground other guy sends up spare whack too SUPER SHARK TORPEDO brutal seemingly unsports manlike way fly Combat thats way its done insist flying fragile models theyll make confetti out British star Mike Whillance has picked up nickname Whacker Whil lance Soviet-style models use Second-placer Mervyn Jones used So viet kits hed acquired Leningrad Mervyn used rear-intake Nelson engines compromise leading edge SCORE DnmcT HIT WITH ThE NEW SUPER SHARK TORPEDO AUTOMAI1CMOIOR START AT LAUNCH AND SHUT OFF AT TARGET NICAD-540 MOTOR POWER 25 MPH 300 YAJtD LANGE PVC PIPE BODY HR BUILD MOUNT AND LAUNCH SYSTEM INCLD GREAT ON FLOAT PLANES Put real action R/G get thrill scaring direct hit sending $695 torpedo plan set COMBAT R/G 10241 Ridgewood El Paso TX 79925 GLOW DESIGNED PLUG Puts mc e St ng n engine FOR LONGER HIGHER5 Get starts GloBee Unique flat-wound spiral coil element anc high temperature glass-to-metal seal add up faster ignition increased RPM GloBee plugs specified original engine manufacturers purchased over over again Pylon control line racers find GloBee plugs best GloBee plugs designed fit popular engines used today unavailable locally write call Twinn-K collect pricing & delivery information & FREE Catalog MAKE THE GLOBEE / INDY CONNECTION Twinn-K Inc 10296 W Washington St Indianapolis IN 46231 Telephone 317-839-6579FAX 317-839-8928 210 Model Aviation spar order inset engine enough model balance correctly other models good enough win So viet design appropriate tactics has percentages its side US think winning World Championships simply matter beat ing Soviets Actually out standing fliers other countries Hen ning Forbech Denmark teammate Bjarne Schou Hakan Ostman Sweden Roland Forstner Germany fa miliar names 1984 performances World Champs US theyre excellent pilots British team ex tremely strong time Soviets seem have depth talent other country Americans surely dont take backseat Europeans game seems played little differently over Elimination matches seemed drag af ter Americans lost eventual win ner Viacheslav Belaiev probably deservet anyone else field Tht British took second individually thc second time row Mervyn Jones whc took second-place honors worsi luck match Belaievwhich Mer vyn would have won just flying arounc getting air time after exchange oi cuts kills things two mod els crash own because contro horn came loose airborne Predictions next time chance il crap shoot like Control Line Combat responding advertisers mention read about Model Aviation Letters Editor Continued page 12 Original Esquire Enclosed please find photo Es Continued page 21 New Cutting Edge Open Class Soariuf Performance RC Sailplane spans 76 uses twist-wing control Requires RC system elevon mixing function four servos No 670 Limitation $675 CL Profile intermediate Stunt trainer 29140 power spans 51 No 671 Cessna Cardinal $575 FF Reminder Scale sport flier power spans 39 No 672 Krackerjac $1375 RC Updated version pioneer RC sport plane spans 74 Uses 40160 two-stroke 40/60 four-stroke engines Two plan sheets No 193StIletto CL Slum model McDonald winoer 1976 1980 1982 FAt World Clrampo$ 375 No 262Crashmaster CL Crash-proof traloer two oizes19130 aod 35140 power$ 125 No 3101930 Fleet BIplane BC Sport Scale 35/40 4-clranoel Wngspan 56 in. scale Two oheelsS 625 No 314Drake II BC Ken Willards flying boat tar 3-channel 15-power Fly land removable gear$ 375 No 326Taylor Cub BC Don SrolIs Schoolyard-Scale 0490 2-3 channel Spans 50 m$ 350 No 332Zephyr BC Smaf 2-channel glider hand-launch tow Ihernial slope soaringS 200 No 386 Laser 200 BC Sport Scale replica chaorpionslrip Aerobalic filer Uses 40 power 4-5 chasnel Two sheets $ 1075 oNo 4471/2A MIle AmerIca BC Old-Toner WA Texaco model tar 049 glow 2-channels$650 oNo 4604-40 BC Shoulder-wing sport filer tar 4-cycle 40-size engine 4 channels$650 0 NNo 465Blue Max II BC Fan-fly sportoter 40-san engines spans 52 Lightweight sirectare$700 533Cessna C-37 BC Schoolyard Scale fareoun 30s plane br 049110 power 2-dr spans 42 inS500 No939SImIlar Stow-MotIon 15 BC Takos flying wing tar 15 engines spans 600 noes 3-dr BC5350 No 569Elecerosorewie BC Electric aembalic plane spoon 44 ones 06 motorS550 No 57215-260 BC Sport Scale Aerolliallc plane tar 4-stroke 60/65 power spons 0010S1100 CNo 576Serandlpltyl FF Indoor EZO record-holder spans 1771 in$325 Fda 578Scinwelzer 1-269 BC Onarler-scale Saliplane spans 125 Two plan sheetsS1475 No 581Gee Bee Model Y BC Golden Age Racer spans 7210 scale tar 60 power Three plan sheets$1175 0 0 No 566Snapdragon BC Fen-fly/sporlster tar 25130 engines spans 45 inS600 0 86 sh BC Slope-Soadeg Sailplane spans 41 ones 2 BC channels No593Taylorcrsft BC Sport Scale lighlplane haNds Olandard 2-placar clipped-anna ror show stonIer Spans ether 70 fl 0or 58A 30/40 two-strobe 40/48 tour-stroke engoro Two plan shoots docoroentationS1000 58Coronet 150 BC-Assist Old-Timor enlarged 155k spans 72 asas 40-size 4-stroke/30-size 2-strokeS850 tO No 603Sparrow Hawk P30 FE Corepetition rehher-pawer plane won 87 Hats Spans 300S225 E 0No 607curelss Seagull BC Giant Scale biplane spans 90 eses Onadra/Zeeoah power Three plan sheets no doc$2490 No 609Taperwlng BC WA Pylon Racer spano 29 Plan plen parts leasplato sheel5 600 inNo 610Protobype BC Spent biplane spans 48 axes 45/2-cycle 8014-cycle powerS 650 No 619KeIth RIder R4 FF Scale Golden Age racer rebber power spans 18 inS 300 oENo 620GImlet 40 BC SporI/Paltero plane spans 6010 45150 engine 2 sheets$ 1100 zmNo 623Henderson Longster BC Oearlor-scale 1933 Saver spans 9050 tar 4-stroke 40/48 engine 3 plan shl no dec$ 1650 CiNo624Keleher Lavk BC Onarler-scale howehait spans 60 far 60/90 4-stroke power 2 plan sheets no decS 1100 050No626Sweepee BC Spart/Paltore caoards toneard-swept wing spans 6410. noes 40 power 2 plan sheetsS 1300 No628Prlnne Cut BC SporI/Aerobatic plane spoon 00 in. ones Onadro 35/40-slan power Two plan sheets$1300 oNo 930OrigInal Fly Baby BC Old-Tinier spans 72 oses 19125 2-cycle 404-cycle power 2 plan sheets$ 1150 No 635The Gsmbler FE Indoor Bostonian robber-power cabin plane spoon 15% inS 2 00 CNo 636Keytwo BC Tn-geared law-wing sportster fnr 20/25 power spans 44 inS 575 -o 0 No936 OwlRacerCLAScaleBacertorO4Opowerspans2Oin$ 225 C tONo 629 Skyvolt BC Tn-geared Electric anrohalic spartster tsr 98115 power spans 50' inS fiSt N No 641 LII Ole RelIable BC Old-lireur sport filer spans 52 engines5 575 tOn No 644 Bellanca columbIa BC Schoolyard Scale tar 2 BC channels engow Wingspan 48 inS 575 esNo 646 WInter Hawk FF Bebber-power Conpa ditisor coropetitino plane spans 47 in$ 375 E b No 646 Curtlas OC-2 FE SastIs Goldoor Gas Flying Scale biplane ones electoc power spans 24 HiLine Mini-it reolnr $ 325 0No 693 47/66 RC SpecIal BC Aerehatic sport plane 40 power spans 61n 3 plan sheets5 1075 No 651 consortIum BC Hand-bosch HI-Start Glider spans 60 in. S 650 52 Der Fledermaun BC Low-wing sport plane ton 20125 power spans 55 in5 675 C 0No 664 Tannecat BC Tnainer/sportster styled like F14 spans 68 40161 power Four plan sheetsS 1525 0No 655 Aseroatar FE AMA Class AS Gas plane spans 67 noes 325/350cc powerS t00 No 657 Super SquIre BC Trainer ton 35/40 2-stroke 53 4-stroke power spans 56 in 5 750 CNo 656 Shuolkeon Streak CL Trainer uses 2-line Monoline control spans 17 power$ 225 59 BoomoxFFWabefialdBabbercorepettiinnplanenpans54inS 400 No 660 Volkagslane BC Electric-powered sportoler 06 orator spans 50 2 plan shts S 925 No 581 Embmy-OmstIc FF Erebrys Endaronco robber-power plane spans 20 in$ 200 62 BookIes CL Scale antique canard pasher biplane spans 42 2 plan streetsS 1100 No583 Pea Patch BC Sporlsler spans 60 in. noan 40/50 4-stroke power 2 plan sheetsS 900 No 664 Stubs Stunt CL WA StonIer nemiscale spans 37 in 5 500 o No 665 ConscIentIous Objector FE Muidhill flubber corepetition plans spans 50 tat5 575 3 hNo 666 BlItz BC Sportster spans 48 ones hot 28/32 power 2 plan sheelsS 1075 0 iSNo 667 AT6CLSeraincalopastileSlunttrtor35/4Opowtrspans47inS 575 0 No 666 Slow Worm 432 FF AMA Class corepetitian plano tar 00/15 power spans 54 RatS 500 0005 tO cle numbers plans wish order best handling please include re 00 quests payment some other service plans order 193262310314326332386447 460465533539569572576578 CO -581586588593598603607609 0610619620623624626628630 0635636638639641644646648 650651652654655657658659 C0660661662663664665666667 668669670671672 __ Plan price includes first class postage US delivery Which Air Mai over 300 miles orders non-US address 16858 add $250 Air Mail osta e handlin tsr Ian e Check money order payable US funds drawn US bank Model Aviation AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 Weeks delivery ase print carefullyEnclosed $ E ___________________________________________ AMA No _______________ STREET en 0 CITY LSTZIPj quire airplane referred July 1990 issue page 25 has distinctive Esquire triangular block 05 15 Max engine model excellent condition mi nor bruises bought Esquire already built very old whole model except wing has paint finish Brad Greenwood Atchison KS Cloud Seeding Models After four years drought losing full-grown trees native shrubbery canyon wells dry moisture-laden clouds bring thunder lightningbut no rain readers have ideas RC model could used small cloud-seeding operation such thing possible modelers provide service will much demand parched Southern California other drought-stricken areas country Mrs Ivan C Kelley Ruth E Kelleybut Ivans modeler Canyon Country CA Propeller Drill Jigs Self aligns existIng prop hole webra Bully a-Dolmar Zenos um II SunCraft 1617 LoaTnrosnoaAlbuq NM 87102 505-842-9646 TOURNAMENT CHAMPIONS Finals Las Vegas NV Nov 9-11 Special Discounted Airfare call rena Gorny CONTEMPORARY TRAVEL 000-336-0033 Outside NYS 516-360-3663 NYS rum woos U L ENTERPRISL5 212 Model Aviation $1696/ 65
Edition: Model Aviation - 1990/11
Page Numbers: 6, 8, 10, 12, 210, 212
Celebr tion building charaot 22 STITS PLAYBOY 1/3 SCALE 88 J-3 CUB 1/5 SCALE 85 About Engine Intake Noise Ive read numerous articles letters re cently model aircraft noise think James Wilsons article Gopher Canyon August issue formative Ive come across Theres lot said about propeller noise airframe noise exhaust noise far Ive read nothing about intake noise know insignificant Any has ridden two-stroke motorcy cle air cleaner/silencer removed knows Have noticed that charts showing Continued page 8 Goodbye THIS iS MY LAST ISSUE am retiring after being publisher maga zine 16 years last 10 also editor Putting out magazine month has lot work what will remember will pleasant associations have readers authors con tributing editors AMA officers AMA HO personnel especially mem bers magazine staff Without question some finest people world can hope magazine has contributed some way readers enjoyment airplane model ing during tenure has goal am retiring Its simply mat ter conditions right Im exactly spring chicken No pushing out giving problem leaving totally friendly fact provided manage ment substantial advance notice intentions could work toward orderly transition Ross McMullen long role sociate editor will charge upon departure expect will continue make improvements maga zine has support Carl R Wheeley 6 Model Aviation ditor letters will carefully considered general Interest used Send Model AviatIon 1810 Samuel Morse Dr Reston VA 22090 STINSON SR-B 1/5 SCALE 100 PILATUS PORTER GIANT SCALE 98 WACO 10PIPER SUPER CUB 1/5 SCALE 731/4 SCALE 107 MONOCOUPE 90ACORBEN SUPER ACE 1/4 SCALE 96114 SCALE 80 TAYLORCRAFTCURTISS ROBIN CHALLENGER GIANT SCALE 901/5 SCALE 98 Davey Systems 3 REAT SPORT-SCALE IPES Designed 40-60 two-cycle 60-90 four-cycle engines 40-size electric motors three feature box type construction extensive prefabrication quick assembly Also included full size plans step-by-step instruc tions hardware preformed bolt-on landing gear bolt-on wings prepackaged small parts STAMPE SV4 famous French aeroba tic primary trainer Preformed welded wire wing cabane vacuum formed cowl 56 span 1000 sq area 61h 7 lb flying weight GREAT LAKES SPECIAL beautiful rendition classic aerobatic biplane preformed wire cabane struts vacuum formed cowl wheel pants precut tail feathers 53 top 48 bottom wing 798 sq area 6 61/2 lb flying weight STEARMAN 75 PT-17/N25-3 gorgeous copy famous trainer crop sprayer aerobatic show stopper Preformed wire cabane struts precut tail feathers 51 top 48 bottom wings 750 sq area 6 6/2 lb flying weight IPAVEY675 TOWER LANE YSTEMSWEST CUES TER PA 1930 oRPORATIoN 215-430-8645 noise levels different quadrants around model indicate highest noise levels straight ahead exhaust usually points rear Propeller noise ra diates tips Perhaps has sumed noise front pro peller think bears re-examina tion propeller noise such big factor Electrics run similar speeds glow engines similar props much quieter Editor Testing North Carolina State University did agree See four-part report De cember 1989 though March 1990 issues think time intake noise con sidered approaches reduce ex amined case front-intake engines wont simple matter Rear-intake de signs should lend themselves some pretty interesting ideas Testing should done first comparing front- rear-intake engines similar size power output same prop same rpm Chart noise level distri bution around see distribu tion significantly different differ ence noticeable examination jus tified Perhaps engine manufac turers importers would willing such testing make findings avail able consider hope provides food thought someone can something about Gosh knows need info can get about make sport acceptable greatest numbers Rick Murray Portland OR Searching memory recall Tore Paulsen Norway using carbu retor muffler front-intake engine way back 1977 RC Aerobatics World Championships Springfield OH aircraft noticeably quieter others year much good ef fect attributable carburetor muf fler can guessed expect Paulsen good handle pects model aircraft sound Maule M-5 am pleased submit photos Quar ter Scale RC aircraft STOL Maule M-5 Lunar Rocket Specifications Wingspan 93 fuselage length 72 power Quadra Q35X glow total model weight dry 250 lb covering Oracover radio Futaba Conquest Continued page 10 8 Model Aviation Note readers Bob Kopskls monthly RC Electrics column Due personal reasons Bob temporarily unable answer correspondence timely manner Have patience please resist sending him additional mail re quiring response will com pound problem info will ap pear December 1990 column 0 28 KITS TO CHOOSE FROM /5 SCALE Wing Span72 Wing Area 1530 sq Weight12-l3Ibs Engine75-go 2c 90-12 4c / CONTACT YOUR LOCAL DEALER WACO YMF 1/6 SCALE WingSpan ing Area960 Sq Weight 8 lbs Engine 61 2c 90 4c MADE IN THE USA MAFREE COCKPIT KIT Receive FREE cockpit kit PICA standoff scale model purchased between September 1 1990 November 301990 sending proof-of-purchase PICA postmarked no later December31 1990 Proof-of-purchase end label kit box original bill sale will no exceptions dates offer bill sale must clearly show dealers name address No copies bill sale will accepted Void prohibited law coupon must accompany request NAME ____________________________________________________________[v32][b16231225151000]]LA1fl ESS CALE SIZE ____________ CITY STATE ZIP PICA ENTERPRISES INC NE 188th STREET MIAMIFLORIDA 331800305 935-1436 scratch-built M-5 Model Avia tion plans No 356 $1200 works six months compares 11 months first M-5 first Quarter Scale model am process doing lot ground preflight testing Maule its off wild blue yonder new model handles like first should honey flier Bob McCann Jackson MI Spiral Stability article Spiral Stability Bowl Effect Part 1 September 1990 sue interesting well done ever order misleading should also have titled ilplanes because briefly men tions vertical tail no specific guide its size paramount importance FF powered models gas- rubberpowered follows 1During very steep straight-up climb vertical tail size important item Dihedral essentially no help 2If vertical tail too large Continued page 12 IrTiWBBoxi 063 Lorain Ohio 44055 PhonA 216 282-8354 PEANUT SCALE Piper Vagabond Piper Cub Stinson 125 1924 Farman Outdoor kits . $795 OUTDOOR PEANUT Super SIe. $795 NEW Micro X Hornet P-30. 81395 SPORT SCALE PC-6 Porter Taylor Craft Stinson Voyager Rubber CO Power Kits 8995 SPORT MODELS An Embryo Model 18 Span designed wini beginners experts 8895 HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft$795 True Olde Japanese Tissue 10 3 colors$995 Japanese Tissue 12 6 colors$695 Microfilm *496 Glue- $195 Solvent -*175 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thru 085 .. size $250 3/32 thru 5132 .. size $275 winder 61 Mark 1161 5 Complete Line Brown CO Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage ostage $250 COMPLETE CATALOG 10 Model Aviation U HOBBY FOAM STRIPS Factory DIrect Clubs Serious Enthusiasts CLEARANCE SPECIALS PVC WHITE Super sticky 2 sides mount radios servos switches sand paper tools hundreds other uses Lifetime supply 36 yd roll 1 wide 1/16 thick$ 1595 Club case 10 rolls$12495 NEOPRENE WING seatinggasket highest quality adhesive side 1/B thick wide 13 long 25 pieces 5 club 250 pieces $1995 HOBBY KNIFE Large 6 handle break away blade renews tip 6 times ades case included $350 DISPOSABLE MIXING TRAYS Size 5 square metal wood spatulas epoxies putties etc 1 pkg 6 trays 12 spatulas 3 packages Dealer Inquiries Invited Include $200 postage handling Same price size order New York State Residents add Sales Tax AMP INC PO Box 793 Deer Park NY 11729 Narrow uana u MVY ix vniui MIVIM 1Sticker Servo Reversing much b cx Narrow Band Rx work 1991 20 KHZ spacings available new 72 Freqs I Improved CE-9C Micro Servo $4595I SUPER-MICRO SYSTEM PRICES 72MHZ 12 OH 2 Servos 237 OZ$24495 13 CH 3 Servos 281 OZ$29145 I 4 OH 4 Servos 325 OZ33895 5 OH 4 Servos 326 OZI34995 TX Dual Rates $1500Mixer $3995 ISystem S & H $975___I G-MARKO3RIC&061 RIG PLUS I SPARES ARE NOW IN STOcIK ___I ICATALOG $100 USA $300 Foreign Add Equipment Sales Tax Calif Prices Cash Cards 5% More ViSAII I20% Deposit-COD steep straight climb cannot achieved model will inevitably roll off less steep spiraling climb less altitude achieved larger vertical tail worse will 3 The vertical tail must small enough front fin effect spinning tractor propeller will just slightly overcome produce slight directional instabil ity allowing very steep straight-up climb pusher models cannot climb straight up front finwhich retracts glide 4 The acceptable vertical tail size found field successively cutting away until steep straight climb can achieved Too much cutting away will cause Dutch roll troubleseven violent roll crash right after launching starting guide size just barely large enough produce no hint Dutch roll glide ie numerous hand-launched glide tests FF Scale models often have too large vertical tail small dihedral Free ing hinging rudder portion float freely 450 both directions often ade quate prevent spiral instability deviation scale size Further helpful discussions about sub ject modeler book Mak ing Scale Model Airplanes Fly Air craft Data Box 763576 Dallas TX 75224 William F McCombs Dallas TX Continued page 210 12 Model Aviation TAKE THE HOBBY SHOP HOME WITH YOUE THE 14th ANNUAL RADIO CONTROL BUYERS GUIDE reference guide oil R/C hobbies Browse through guide find items need youll know just what ask favorite hobby shop RADIO CONTROL BUYERS GUIDE lets turn wish list shopping list knowing whats available con plan new projects improve existing projects Price formation also helps odd up just whot plans will cost Look RADIO CONTROL BUYERS GUIDE local hobby shop call 800-446-5489 weekdays 830 500 CST order RADIO CONTROL BUYERS GUIDE supports Academy Model Aeronautics AMA donating $100 copy guide purchase authorize donation AMA mall hobby shop reciept coupon below Kalmbach Order direct using coupon calling 800-446-5489 OSSOO@ O@@@OSSO@@ ... 6 OOO@@OO 66666 Ta order send Dept 0196 RADIO CONTROL BUYERS GUIDE PO Box 1612 WaukeshaWI 53187-1612 VESI Id like order _____ RADIO CONTROL BUYERS GUIDES #12092 $ ______ ent enclosed ge account Name__________________________________________________ Street______________________________________________________[v33][b22021205153010410]] Oily State Zip Country Charge ercard ican Express mm $15 Card#________________________ Exp Date_____________ Signature Include postage handling US $150 canadian foreign add 15% minimum S3 Make payment US funds Wisconsin residents add 5% sales fax Price subject changeDept 0196 S CANNON Phone 18051581-5081 RIO SYSTEMS 2828 cochran st Soite 281 Sim Vailey CA 93065I D/~YSTEMS MADE IN READY TO FLY 1/8 SCALE TOP GUN BULLDOG 149 No except will know ARF Info Orders 914-429-3484 800-628-3484 CAMBRIDGE MODEL AIRCRAFT PO Box 26 Norwood N J 07648 Introducing SABER Wing Span 121 Airfoil SD7037 Obechi Sheeting Completed Fiberglass Fuselage Send 2 stamps copy Catalog showing complete line Multichannel Gliders DODGSON DESIGNS -21230 Damson Road Bothell WA 98021 Phone 206-776-8067 ub off speed mass can also de fensive tool flier takes off oppo nents whole streamer early flight normally has scramble remaining time trying avoid giving away bunch cuts situation flier has Soviet-style model has option just whacking other guys plane flier already 100 points up cut other guy probably will lose lots time ground other guy sends up spare whack too SUPER SHARK TORPEDO brutal seemingly unsports manlike way fly Combat thats way its done insist flying fragile models theyll make confetti out British star Mike Whillance has picked up nickname Whacker Whil lance Soviet-style models use Second-placer Mervyn Jones used So viet kits hed acquired Leningrad Mervyn used rear-intake Nelson engines compromise leading edge SCORE DnmcT HIT WITH ThE NEW SUPER SHARK TORPEDO AUTOMAI1CMOIOR START AT LAUNCH AND SHUT OFF AT TARGET NICAD-540 MOTOR POWER 25 MPH 300 YAJtD LANGE PVC PIPE BODY HR BUILD MOUNT AND LAUNCH SYSTEM INCLD GREAT ON FLOAT PLANES Put real action R/G get thrill scaring direct hit sending $695 torpedo plan set COMBAT R/G 10241 Ridgewood El Paso TX 79925 GLOW DESIGNED PLUG Puts mc e St ng n engine FOR LONGER HIGHER5 Get starts GloBee Unique flat-wound spiral coil element anc high temperature glass-to-metal seal add up faster ignition increased RPM GloBee plugs specified original engine manufacturers purchased over over again Pylon control line racers find GloBee plugs best GloBee plugs designed fit popular engines used today unavailable locally write call Twinn-K collect pricing & delivery information & FREE Catalog MAKE THE GLOBEE / INDY CONNECTION Twinn-K Inc 10296 W Washington St Indianapolis IN 46231 Telephone 317-839-6579FAX 317-839-8928 210 Model Aviation spar order inset engine enough model balance correctly other models good enough win So viet design appropriate tactics has percentages its side US think winning World Championships simply matter beat ing Soviets Actually out standing fliers other countries Hen ning Forbech Denmark teammate Bjarne Schou Hakan Ostman Sweden Roland Forstner Germany fa miliar names 1984 performances World Champs US theyre excellent pilots British team ex tremely strong time Soviets seem have depth talent other country Americans surely dont take backseat Europeans game seems played little differently over Elimination matches seemed drag af ter Americans lost eventual win ner Viacheslav Belaiev probably deservet anyone else field Tht British took second individually thc second time row Mervyn Jones whc took second-place honors worsi luck match Belaievwhich Mer vyn would have won just flying arounc getting air time after exchange oi cuts kills things two mod els crash own because contro horn came loose airborne Predictions next time chance il crap shoot like Control Line Combat responding advertisers mention read about Model Aviation Letters Editor Continued page 12 Original Esquire Enclosed please find photo Es Continued page 21 New Cutting Edge Open Class Soariuf Performance RC Sailplane spans 76 uses twist-wing control Requires RC system elevon mixing function four servos No 670 Limitation $675 CL Profile intermediate Stunt trainer 29140 power spans 51 No 671 Cessna Cardinal $575 FF Reminder Scale sport flier power spans 39 No 672 Krackerjac $1375 RC Updated version pioneer RC sport plane spans 74 Uses 40160 two-stroke 40/60 four-stroke engines Two plan sheets No 193StIletto CL Slum model McDonald winoer 1976 1980 1982 FAt World Clrampo$ 375 No 262Crashmaster CL Crash-proof traloer two oizes19130 aod 35140 power$ 125 No 3101930 Fleet BIplane BC Sport Scale 35/40 4-clranoel Wngspan 56 in. scale Two oheelsS 625 No 314Drake II BC Ken Willards flying boat tar 3-channel 15-power Fly land removable gear$ 375 No 326Taylor Cub BC Don SrolIs Schoolyard-Scale 0490 2-3 channel Spans 50 m$ 350 No 332Zephyr BC Smaf 2-channel glider hand-launch tow Ihernial slope soaringS 200 No 386 Laser 200 BC Sport Scale replica chaorpionslrip Aerobalic filer Uses 40 power 4-5 chasnel Two sheets $ 1075 oNo 4471/2A MIle AmerIca BC Old-Toner WA Texaco model tar 049 glow 2-channels$650 oNo 4604-40 BC Shoulder-wing sport filer tar 4-cycle 40-size engine 4 channels$650 0 NNo 465Blue Max II BC Fan-fly sportoter 40-san engines spans 52 Lightweight sirectare$700 533Cessna C-37 BC Schoolyard Scale fareoun 30s plane br 049110 power 2-dr spans 42 inS500 No939SImIlar Stow-MotIon 15 BC Takos flying wing tar 15 engines spans 600 noes 3-dr BC5350 No 569Elecerosorewie BC Electric aembalic plane spoon 44 ones 06 motorS550 No 57215-260 BC Sport Scale Aerolliallc plane tar 4-stroke 60/65 power spons 0010S1100 CNo 576Serandlpltyl FF Indoor EZO record-holder spans 1771 in$325 Fda 578Scinwelzer 1-269 BC Onarler-scale Saliplane spans 125 Two plan sheetsS1475 No 581Gee Bee Model Y BC Golden Age Racer spans 7210 scale tar 60 power Three plan sheets$1175 0 0 No 566Snapdragon BC Fen-fly/sporlster tar 25130 engines spans 45 inS600 0 86 sh BC Slope-Soadeg Sailplane spans 41 ones 2 BC channels No593Taylorcrsft BC Sport Scale lighlplane haNds Olandard 2-placar clipped-anna ror show stonIer Spans ether 70 fl 0or 58A 30/40 two-strobe 40/48 tour-stroke engoro Two plan shoots docoroentationS1000 58Coronet 150 BC-Assist Old-Timor enlarged 155k spans 72 asas 40-size 4-stroke/30-size 2-strokeS850 tO No 603Sparrow Hawk P30 FE Corepetition rehher-pawer plane won 87 Hats Spans 300S225 E 0No 607curelss Seagull BC Giant Scale biplane spans 90 eses Onadra/Zeeoah power Three plan sheets no doc$2490 No 609Taperwlng BC WA Pylon Racer spano 29 Plan plen parts leasplato sheel5 600 inNo 610Protobype BC Spent biplane spans 48 axes 45/2-cycle 8014-cycle powerS 650 No 619KeIth RIder R4 FF Scale Golden Age racer rebber power spans 18 inS 300 oENo 620GImlet 40 BC SporI/Paltero plane spans 6010 45150 engine 2 sheets$ 1100 zmNo 623Henderson Longster BC Oearlor-scale 1933 Saver spans 9050 tar 4-stroke 40/48 engine 3 plan shl no dec$ 1650 CiNo624Keleher Lavk BC Onarler-scale howehait spans 60 far 60/90 4-stroke power 2 plan sheets no decS 1100 050No626Sweepee BC Spart/Paltore caoards toneard-swept wing spans 6410. noes 40 power 2 plan sheetsS 1300 No628Prlnne Cut BC SporI/Aerobatic plane spoon 00 in. ones Onadro 35/40-slan power Two plan sheets$1300 oNo 930OrigInal Fly Baby BC Old-Tinier spans 72 oses 19125 2-cycle 404-cycle power 2 plan sheets$ 1150 No 635The Gsmbler FE Indoor Bostonian robber-power cabin plane spoon 15% inS 2 00 CNo 636Keytwo BC Tn-geared law-wing sportster fnr 20/25 power spans 44 inS 575 -o 0 No936 OwlRacerCLAScaleBacertorO4Opowerspans2Oin$ 225 C tONo 629 Skyvolt BC Tn-geared Electric anrohalic spartster tsr 98115 power spans 50' inS fiSt N No 641 LII Ole RelIable BC Old-lireur sport filer spans 52 engines5 575 tOn No 644 Bellanca columbIa BC Schoolyard Scale tar 2 BC channels engow Wingspan 48 inS 575 esNo 646 WInter Hawk FF Bebber-power Conpa ditisor coropetitino plane spans 47 in$ 375 E b No 646 Curtlas OC-2 FE SastIs Goldoor Gas Flying Scale biplane ones electoc power spans 24 HiLine Mini-it reolnr $ 325 0No 693 47/66 RC SpecIal BC Aerehatic sport plane 40 power spans 61n 3 plan sheets5 1075 No 651 consortIum BC Hand-bosch HI-Start Glider spans 60 in. S 650 52 Der Fledermaun BC Low-wing sport plane ton 20125 power spans 55 in5 675 C 0No 664 Tannecat BC Tnainer/sportster styled like F14 spans 68 40161 power Four plan sheetsS 1525 0No 655 Aseroatar FE AMA Class AS Gas plane spans 67 noes 325/350cc powerS t00 No 657 Super SquIre BC Trainer ton 35/40 2-stroke 53 4-stroke power spans 56 in 5 750 CNo 656 Shuolkeon Streak CL Trainer uses 2-line Monoline control spans 17 power$ 225 59 BoomoxFFWabefialdBabbercorepettiinnplanenpans54inS 400 No 660 Volkagslane BC Electric-powered sportoler 06 orator spans 50 2 plan shts S 925 No 581 Embmy-OmstIc FF Erebrys Endaronco robber-power plane spans 20 in$ 200 62 BookIes CL Scale antique canard pasher biplane spans 42 2 plan streetsS 1100 No583 Pea Patch BC Sporlsler spans 60 in. noan 40/50 4-stroke power 2 plan sheetsS 900 No 664 Stubs Stunt CL WA StonIer nemiscale spans 37 in 5 500 o No 665 ConscIentIous Objector FE Muidhill flubber corepetition plans spans 50 tat5 575 3 hNo 666 BlItz BC Sportster spans 48 ones hot 28/32 power 2 plan sheelsS 1075 0 iSNo 667 AT6CLSeraincalopastileSlunttrtor35/4Opowtrspans47inS 575 0 No 666 Slow Worm 432 FF AMA Class corepetitian plano tar 00/15 power spans 54 RatS 500 0005 tO cle numbers plans wish order best handling please include re 00 quests payment some other service plans order 193262310314326332386447 460465533539569572576578 CO -581586588593598603607609 0610619620623624626628630 0635636638639641644646648 650651652654655657658659 C0660661662663664665666667 668669670671672 __ Plan price includes first class postage US delivery Which Air Mai over 300 miles orders non-US address 16858 add $250 Air Mail osta e handlin tsr Ian e Check money order payable US funds drawn US bank Model Aviation AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 Weeks delivery ase print carefullyEnclosed $ E ___________________________________________ AMA No _______________ STREET en 0 CITY LSTZIPj quire airplane referred July 1990 issue page 25 has distinctive Esquire triangular block 05 15 Max engine model excellent condition mi nor bruises bought Esquire already built very old whole model except wing has paint finish Brad Greenwood Atchison KS Cloud Seeding Models After four years drought losing full-grown trees native shrubbery canyon wells dry moisture-laden clouds bring thunder lightningbut no rain readers have ideas RC model could used small cloud-seeding operation such thing possible modelers provide service will much demand parched Southern California other drought-stricken areas country Mrs Ivan C Kelley Ruth E Kelleybut Ivans modeler Canyon Country CA Propeller Drill Jigs Self aligns existIng prop hole webra Bully a-Dolmar Zenos um II SunCraft 1617 LoaTnrosnoaAlbuq NM 87102 505-842-9646 TOURNAMENT CHAMPIONS Finals Las Vegas NV Nov 9-11 Special Discounted Airfare call rena Gorny CONTEMPORARY TRAVEL 000-336-0033 Outside NYS 516-360-3663 NYS rum woos U L ENTERPRISL5 212 Model Aviation $1696/ 65
Edition: Model Aviation - 1990/11
Page Numbers: 6, 8, 10, 12, 210, 212
Celebr tion building charaot 22 STITS PLAYBOY 1/3 SCALE 88 J-3 CUB 1/5 SCALE 85 About Engine Intake Noise Ive read numerous articles letters re cently model aircraft noise think James Wilsons article Gopher Canyon August issue formative Ive come across Theres lot said about propeller noise airframe noise exhaust noise far Ive read nothing about intake noise know insignificant Any has ridden two-stroke motorcy cle air cleaner/silencer removed knows Have noticed that charts showing Continued page 8 Goodbye THIS iS MY LAST ISSUE am retiring after being publisher maga zine 16 years last 10 also editor Putting out magazine month has lot work what will remember will pleasant associations have readers authors con tributing editors AMA officers AMA HO personnel especially mem bers magazine staff Without question some finest people world can hope magazine has contributed some way readers enjoyment airplane model ing during tenure has goal am retiring Its simply mat ter conditions right Im exactly spring chicken No pushing out giving problem leaving totally friendly fact provided manage ment substantial advance notice intentions could work toward orderly transition Ross McMullen long role sociate editor will charge upon departure expect will continue make improvements maga zine has support Carl R Wheeley 6 Model Aviation ditor letters will carefully considered general Interest used Send Model AviatIon 1810 Samuel Morse Dr Reston VA 22090 STINSON SR-B 1/5 SCALE 100 PILATUS PORTER GIANT SCALE 98 WACO 10PIPER SUPER CUB 1/5 SCALE 731/4 SCALE 107 MONOCOUPE 90ACORBEN SUPER ACE 1/4 SCALE 96114 SCALE 80 TAYLORCRAFTCURTISS ROBIN CHALLENGER GIANT SCALE 901/5 SCALE 98 Davey Systems 3 REAT SPORT-SCALE IPES Designed 40-60 two-cycle 60-90 four-cycle engines 40-size electric motors three feature box type construction extensive prefabrication quick assembly Also included full size plans step-by-step instruc tions hardware preformed bolt-on landing gear bolt-on wings prepackaged small parts STAMPE SV4 famous French aeroba tic primary trainer Preformed welded wire wing cabane vacuum formed cowl 56 span 1000 sq area 61h 7 lb flying weight GREAT LAKES SPECIAL beautiful rendition classic aerobatic biplane preformed wire cabane struts vacuum formed cowl wheel pants precut tail feathers 53 top 48 bottom wing 798 sq area 6 61/2 lb flying weight STEARMAN 75 PT-17/N25-3 gorgeous copy famous trainer crop sprayer aerobatic show stopper Preformed wire cabane struts precut tail feathers 51 top 48 bottom wings 750 sq area 6 6/2 lb flying weight IPAVEY675 TOWER LANE YSTEMSWEST CUES TER PA 1930 oRPORATIoN 215-430-8645 noise levels different quadrants around model indicate highest noise levels straight ahead exhaust usually points rear Propeller noise ra diates tips Perhaps has sumed noise front pro peller think bears re-examina tion propeller noise such big factor Electrics run similar speeds glow engines similar props much quieter Editor Testing North Carolina State University did agree See four-part report De cember 1989 though March 1990 issues think time intake noise con sidered approaches reduce ex amined case front-intake engines wont simple matter Rear-intake de signs should lend themselves some pretty interesting ideas Testing should done first comparing front- rear-intake engines similar size power output same prop same rpm Chart noise level distri bution around see distribu tion significantly different differ ence noticeable examination jus tified Perhaps engine manufac turers importers would willing such testing make findings avail able consider hope provides food thought someone can something about Gosh knows need info can get about make sport acceptable greatest numbers Rick Murray Portland OR Searching memory recall Tore Paulsen Norway using carbu retor muffler front-intake engine way back 1977 RC Aerobatics World Championships Springfield OH aircraft noticeably quieter others year much good ef fect attributable carburetor muf fler can guessed expect Paulsen good handle pects model aircraft sound Maule M-5 am pleased submit photos Quar ter Scale RC aircraft STOL Maule M-5 Lunar Rocket Specifications Wingspan 93 fuselage length 72 power Quadra Q35X glow total model weight dry 250 lb covering Oracover radio Futaba Conquest Continued page 10 8 Model Aviation Note readers Bob Kopskls monthly RC Electrics column Due personal reasons Bob temporarily unable answer correspondence timely manner Have patience please resist sending him additional mail re quiring response will com pound problem info will ap pear December 1990 column 0 28 KITS TO CHOOSE FROM /5 SCALE Wing Span72 Wing Area 1530 sq Weight12-l3Ibs Engine75-go 2c 90-12 4c / CONTACT YOUR LOCAL DEALER WACO YMF 1/6 SCALE WingSpan ing Area960 Sq Weight 8 lbs Engine 61 2c 90 4c MADE IN THE USA MAFREE COCKPIT KIT Receive FREE cockpit kit PICA standoff scale model purchased between September 1 1990 November 301990 sending proof-of-purchase PICA postmarked no later December31 1990 Proof-of-purchase end label kit box original bill sale will no exceptions dates offer bill sale must clearly show dealers name address No copies bill sale will accepted Void prohibited law coupon must accompany request NAME ____________________________________________________________[v32][b16231225151000]]LA1fl ESS CALE SIZE ____________ CITY STATE ZIP PICA ENTERPRISES INC NE 188th STREET MIAMIFLORIDA 331800305 935-1436 scratch-built M-5 Model Avia tion plans No 356 $1200 works six months compares 11 months first M-5 first Quarter Scale model am process doing lot ground preflight testing Maule its off wild blue yonder new model handles like first should honey flier Bob McCann Jackson MI Spiral Stability article Spiral Stability Bowl Effect Part 1 September 1990 sue interesting well done ever order misleading should also have titled ilplanes because briefly men tions vertical tail no specific guide its size paramount importance FF powered models gas- rubberpowered follows 1During very steep straight-up climb vertical tail size important item Dihedral essentially no help 2If vertical tail too large Continued page 12 IrTiWBBoxi 063 Lorain Ohio 44055 PhonA 216 282-8354 PEANUT SCALE Piper Vagabond Piper Cub Stinson 125 1924 Farman Outdoor kits . $795 OUTDOOR PEANUT Super SIe. $795 NEW Micro X Hornet P-30. 81395 SPORT SCALE PC-6 Porter Taylor Craft Stinson Voyager Rubber CO Power Kits 8995 SPORT MODELS An Embryo Model 18 Span designed wini beginners experts 8895 HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft$795 True Olde Japanese Tissue 10 3 colors$995 Japanese Tissue 12 6 colors$695 Microfilm *496 Glue- $195 Solvent -*175 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thru 085 .. size $250 3/32 thru 5132 .. size $275 winder 61 Mark 1161 5 Complete Line Brown CO Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage ostage $250 COMPLETE CATALOG 10 Model Aviation U HOBBY FOAM STRIPS Factory DIrect Clubs Serious Enthusiasts CLEARANCE SPECIALS PVC WHITE Super sticky 2 sides mount radios servos switches sand paper tools hundreds other uses Lifetime supply 36 yd roll 1 wide 1/16 thick$ 1595 Club case 10 rolls$12495 NEOPRENE WING seatinggasket highest quality adhesive side 1/B thick wide 13 long 25 pieces 5 club 250 pieces $1995 HOBBY KNIFE Large 6 handle break away blade renews tip 6 times ades case included $350 DISPOSABLE MIXING TRAYS Size 5 square metal wood spatulas epoxies putties etc 1 pkg 6 trays 12 spatulas 3 packages Dealer Inquiries Invited Include $200 postage handling Same price size order New York State Residents add Sales Tax AMP INC PO Box 793 Deer Park NY 11729 Narrow uana u MVY ix vniui MIVIM 1Sticker Servo Reversing much b cx Narrow Band Rx work 1991 20 KHZ spacings available new 72 Freqs I Improved CE-9C Micro Servo $4595I SUPER-MICRO SYSTEM PRICES 72MHZ 12 OH 2 Servos 237 OZ$24495 13 CH 3 Servos 281 OZ$29145 I 4 OH 4 Servos 325 OZ33895 5 OH 4 Servos 326 OZI34995 TX Dual Rates $1500Mixer $3995 ISystem S & H $975___I G-MARKO3RIC&061 RIG PLUS I SPARES ARE NOW IN STOcIK ___I ICATALOG $100 USA $300 Foreign Add Equipment Sales Tax Calif Prices Cash Cards 5% More ViSAII I20% Deposit-COD steep straight climb cannot achieved model will inevitably roll off less steep spiraling climb less altitude achieved larger vertical tail worse will 3 The vertical tail must small enough front fin effect spinning tractor propeller will just slightly overcome produce slight directional instabil ity allowing very steep straight-up climb pusher models cannot climb straight up front finwhich retracts glide 4 The acceptable vertical tail size found field successively cutting away until steep straight climb can achieved Too much cutting away will cause Dutch roll troubleseven violent roll crash right after launching starting guide size just barely large enough produce no hint Dutch roll glide ie numerous hand-launched glide tests FF Scale models often have too large vertical tail small dihedral Free ing hinging rudder portion float freely 450 both directions often ade quate prevent spiral instability deviation scale size Further helpful discussions about sub ject modeler book Mak ing Scale Model Airplanes Fly Air craft Data Box 763576 Dallas TX 75224 William F McCombs Dallas TX Continued page 210 12 Model Aviation TAKE THE HOBBY SHOP HOME WITH YOUE THE 14th ANNUAL RADIO CONTROL BUYERS GUIDE reference guide oil R/C hobbies Browse through guide find items need youll know just what ask favorite hobby shop RADIO CONTROL BUYERS GUIDE lets turn wish list shopping list knowing whats available con plan new projects improve existing projects Price formation also helps odd up just whot plans will cost Look RADIO CONTROL BUYERS GUIDE local hobby shop call 800-446-5489 weekdays 830 500 CST order RADIO CONTROL BUYERS GUIDE supports Academy Model Aeronautics AMA donating $100 copy guide purchase authorize donation AMA mall hobby shop reciept coupon below Kalmbach Order direct using coupon calling 800-446-5489 OSSOO@ O@@@OSSO@@ ... 6 OOO@@OO 66666 Ta order send Dept 0196 RADIO CONTROL BUYERS GUIDE PO Box 1612 WaukeshaWI 53187-1612 VESI Id like order _____ RADIO CONTROL BUYERS GUIDES #12092 $ ______ ent enclosed ge account Name__________________________________________________ Street______________________________________________________[v33][b22021205153010410]] Oily State Zip Country Charge ercard ican Express mm $15 Card#________________________ Exp Date_____________ Signature Include postage handling US $150 canadian foreign add 15% minimum S3 Make payment US funds Wisconsin residents add 5% sales fax Price subject changeDept 0196 S CANNON Phone 18051581-5081 RIO SYSTEMS 2828 cochran st Soite 281 Sim Vailey CA 93065I D/~YSTEMS MADE IN READY TO FLY 1/8 SCALE TOP GUN BULLDOG 149 No except will know ARF Info Orders 914-429-3484 800-628-3484 CAMBRIDGE MODEL AIRCRAFT PO Box 26 Norwood N J 07648 Introducing SABER Wing Span 121 Airfoil SD7037 Obechi Sheeting Completed Fiberglass Fuselage Send 2 stamps copy Catalog showing complete line Multichannel Gliders DODGSON DESIGNS -21230 Damson Road Bothell WA 98021 Phone 206-776-8067 ub off speed mass can also de fensive tool flier takes off oppo nents whole streamer early flight normally has scramble remaining time trying avoid giving away bunch cuts situation flier has Soviet-style model has option just whacking other guys plane flier already 100 points up cut other guy probably will lose lots time ground other guy sends up spare whack too SUPER SHARK TORPEDO brutal seemingly unsports manlike way fly Combat thats way its done insist flying fragile models theyll make confetti out British star Mike Whillance has picked up nickname Whacker Whil lance Soviet-style models use Second-placer Mervyn Jones used So viet kits hed acquired Leningrad Mervyn used rear-intake Nelson engines compromise leading edge SCORE DnmcT HIT WITH ThE NEW SUPER SHARK TORPEDO AUTOMAI1CMOIOR START AT LAUNCH AND SHUT OFF AT TARGET NICAD-540 MOTOR POWER 25 MPH 300 YAJtD LANGE PVC PIPE BODY HR BUILD MOUNT AND LAUNCH SYSTEM INCLD GREAT ON FLOAT PLANES Put real action R/G get thrill scaring direct hit sending $695 torpedo plan set COMBAT R/G 10241 Ridgewood El Paso TX 79925 GLOW DESIGNED PLUG Puts mc e St ng n engine FOR LONGER HIGHER5 Get starts GloBee Unique flat-wound spiral coil element anc high temperature glass-to-metal seal add up faster ignition increased RPM GloBee plugs specified original engine manufacturers purchased over over again Pylon control line racers find GloBee plugs best GloBee plugs designed fit popular engines used today unavailable locally write call Twinn-K collect pricing & delivery information & FREE Catalog MAKE THE GLOBEE / INDY CONNECTION Twinn-K Inc 10296 W Washington St Indianapolis IN 46231 Telephone 317-839-6579FAX 317-839-8928 210 Model Aviation spar order inset engine enough model balance correctly other models good enough win So viet design appropriate tactics has percentages its side US think winning World Championships simply matter beat ing Soviets Actually out standing fliers other countries Hen ning Forbech Denmark teammate Bjarne Schou Hakan Ostman Sweden Roland Forstner Germany fa miliar names 1984 performances World Champs US theyre excellent pilots British team ex tremely strong time Soviets seem have depth talent other country Americans surely dont take backseat Europeans game seems played little differently over Elimination matches seemed drag af ter Americans lost eventual win ner Viacheslav Belaiev probably deservet anyone else field Tht British took second individually thc second time row Mervyn Jones whc took second-place honors worsi luck match Belaievwhich Mer vyn would have won just flying arounc getting air time after exchange oi cuts kills things two mod els crash own because contro horn came loose airborne Predictions next time chance il crap shoot like Control Line Combat responding advertisers mention read about Model Aviation Letters Editor Continued page 12 Original Esquire Enclosed please find photo Es Continued page 21 New Cutting Edge Open Class Soariuf Performance RC Sailplane spans 76 uses twist-wing control Requires RC system elevon mixing function four servos No 670 Limitation $675 CL Profile intermediate Stunt trainer 29140 power spans 51 No 671 Cessna Cardinal $575 FF Reminder Scale sport flier power spans 39 No 672 Krackerjac $1375 RC Updated version pioneer RC sport plane spans 74 Uses 40160 two-stroke 40/60 four-stroke engines Two plan sheets No 193StIletto CL Slum model McDonald winoer 1976 1980 1982 FAt World Clrampo$ 375 No 262Crashmaster CL Crash-proof traloer two oizes19130 aod 35140 power$ 125 No 3101930 Fleet BIplane BC Sport Scale 35/40 4-clranoel Wngspan 56 in. scale Two oheelsS 625 No 314Drake II BC Ken Willards flying boat tar 3-channel 15-power Fly land removable gear$ 375 No 326Taylor Cub BC Don SrolIs Schoolyard-Scale 0490 2-3 channel Spans 50 m$ 350 No 332Zephyr BC Smaf 2-channel glider hand-launch tow Ihernial slope soaringS 200 No 386 Laser 200 BC Sport Scale replica chaorpionslrip Aerobalic filer Uses 40 power 4-5 chasnel Two sheets $ 1075 oNo 4471/2A MIle AmerIca BC Old-Toner WA Texaco model tar 049 glow 2-channels$650 oNo 4604-40 BC Shoulder-wing sport filer tar 4-cycle 40-size engine 4 channels$650 0 NNo 465Blue Max II BC Fan-fly sportoter 40-san engines spans 52 Lightweight sirectare$700 533Cessna C-37 BC Schoolyard Scale fareoun 30s plane br 049110 power 2-dr spans 42 inS500 No939SImIlar Stow-MotIon 15 BC Takos flying wing tar 15 engines spans 600 noes 3-dr BC5350 No 569Elecerosorewie BC Electric aembalic plane spoon 44 ones 06 motorS550 No 57215-260 BC Sport Scale Aerolliallc plane tar 4-stroke 60/65 power spons 0010S1100 CNo 576Serandlpltyl FF Indoor EZO record-holder spans 1771 in$325 Fda 578Scinwelzer 1-269 BC Onarler-scale Saliplane spans 125 Two plan sheetsS1475 No 581Gee Bee Model Y BC Golden Age Racer spans 7210 scale tar 60 power Three plan sheets$1175 0 0 No 566Snapdragon BC Fen-fly/sporlster tar 25130 engines spans 45 inS600 0 86 sh BC Slope-Soadeg Sailplane spans 41 ones 2 BC channels No593Taylorcrsft BC Sport Scale lighlplane haNds Olandard 2-placar clipped-anna ror show stonIer Spans ether 70 fl 0or 58A 30/40 two-strobe 40/48 tour-stroke engoro Two plan shoots docoroentationS1000 58Coronet 150 BC-Assist Old-Timor enlarged 155k spans 72 asas 40-size 4-stroke/30-size 2-strokeS850 tO No 603Sparrow Hawk P30 FE Corepetition rehher-pawer plane won 87 Hats Spans 300S225 E 0No 607curelss Seagull BC Giant Scale biplane spans 90 eses Onadra/Zeeoah power Three plan sheets no doc$2490 No 609Taperwlng BC WA Pylon Racer spano 29 Plan plen parts leasplato sheel5 600 inNo 610Protobype BC Spent biplane spans 48 axes 45/2-cycle 8014-cycle powerS 650 No 619KeIth RIder R4 FF Scale Golden Age racer rebber power spans 18 inS 300 oENo 620GImlet 40 BC SporI/Paltero plane spans 6010 45150 engine 2 sheets$ 1100 zmNo 623Henderson Longster BC Oearlor-scale 1933 Saver spans 9050 tar 4-stroke 40/48 engine 3 plan shl no dec$ 1650 CiNo624Keleher Lavk BC Onarler-scale howehait spans 60 far 60/90 4-stroke power 2 plan sheets no decS 1100 050No626Sweepee BC Spart/Paltore caoards toneard-swept wing spans 6410. noes 40 power 2 plan sheetsS 1300 No628Prlnne Cut BC SporI/Aerobatic plane spoon 00 in. ones Onadro 35/40-slan power Two plan sheets$1300 oNo 930OrigInal Fly Baby BC Old-Tinier spans 72 oses 19125 2-cycle 404-cycle power 2 plan sheets$ 1150 No 635The Gsmbler FE Indoor Bostonian robber-power cabin plane spoon 15% inS 2 00 CNo 636Keytwo BC Tn-geared law-wing sportster fnr 20/25 power spans 44 inS 575 -o 0 No936 OwlRacerCLAScaleBacertorO4Opowerspans2Oin$ 225 C tONo 629 Skyvolt BC Tn-geared Electric anrohalic spartster tsr 98115 power spans 50' inS fiSt N No 641 LII Ole RelIable BC Old-lireur sport filer spans 52 engines5 575 tOn No 644 Bellanca columbIa BC Schoolyard Scale tar 2 BC channels engow Wingspan 48 inS 575 esNo 646 WInter Hawk FF Bebber-power Conpa ditisor coropetitino plane spans 47 in$ 375 E b No 646 Curtlas OC-2 FE SastIs Goldoor Gas Flying Scale biplane ones electoc power spans 24 HiLine Mini-it reolnr $ 325 0No 693 47/66 RC SpecIal BC Aerehatic sport plane 40 power spans 61n 3 plan sheets5 1075 No 651 consortIum BC Hand-bosch HI-Start Glider spans 60 in. S 650 52 Der Fledermaun BC Low-wing sport plane ton 20125 power spans 55 in5 675 C 0No 664 Tannecat BC Tnainer/sportster styled like F14 spans 68 40161 power Four plan sheetsS 1525 0No 655 Aseroatar FE AMA Class AS Gas plane spans 67 noes 325/350cc powerS t00 No 657 Super SquIre BC Trainer ton 35/40 2-stroke 53 4-stroke power spans 56 in 5 750 CNo 656 Shuolkeon Streak CL Trainer uses 2-line Monoline control spans 17 power$ 225 59 BoomoxFFWabefialdBabbercorepettiinnplanenpans54inS 400 No 660 Volkagslane BC Electric-powered sportoler 06 orator spans 50 2 plan shts S 925 No 581 Embmy-OmstIc FF Erebrys Endaronco robber-power plane spans 20 in$ 200 62 BookIes CL Scale antique canard pasher biplane spans 42 2 plan streetsS 1100 No583 Pea Patch BC Sporlsler spans 60 in. noan 40/50 4-stroke power 2 plan sheetsS 900 No 664 Stubs Stunt CL WA StonIer nemiscale spans 37 in 5 500 o No 665 ConscIentIous Objector FE Muidhill flubber corepetition plans spans 50 tat5 575 3 hNo 666 BlItz BC Sportster spans 48 ones hot 28/32 power 2 plan sheelsS 1075 0 iSNo 667 AT6CLSeraincalopastileSlunttrtor35/4Opowtrspans47inS 575 0 No 666 Slow Worm 432 FF AMA Class corepetitian plano tar 00/15 power spans 54 RatS 500 0005 tO cle numbers plans wish order best handling please include re 00 quests payment some other service plans order 193262310314326332386447 460465533539569572576578 CO -581586588593598603607609 0610619620623624626628630 0635636638639641644646648 650651652654655657658659 C0660661662663664665666667 668669670671672 __ Plan price includes first class postage US delivery Which Air Mai over 300 miles orders non-US address 16858 add $250 Air Mail osta e handlin tsr Ian e Check money order payable US funds drawn US bank Model Aviation AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 Weeks delivery ase print carefullyEnclosed $ E ___________________________________________ AMA No _______________ STREET en 0 CITY LSTZIPj quire airplane referred July 1990 issue page 25 has distinctive Esquire triangular block 05 15 Max engine model excellent condition mi nor bruises bought Esquire already built very old whole model except wing has paint finish Brad Greenwood Atchison KS Cloud Seeding Models After four years drought losing full-grown trees native shrubbery canyon wells dry moisture-laden clouds bring thunder lightningbut no rain readers have ideas RC model could used small cloud-seeding operation such thing possible modelers provide service will much demand parched Southern California other drought-stricken areas country Mrs Ivan C Kelley Ruth E Kelleybut Ivans modeler Canyon Country CA Propeller Drill Jigs Self aligns existIng prop hole webra Bully a-Dolmar Zenos um II SunCraft 1617 LoaTnrosnoaAlbuq NM 87102 505-842-9646 TOURNAMENT CHAMPIONS Finals Las Vegas NV Nov 9-11 Special Discounted Airfare call rena Gorny CONTEMPORARY TRAVEL 000-336-0033 Outside NYS 516-360-3663 NYS rum woos U L ENTERPRISL5 212 Model Aviation $1696/ 65
Edition: Model Aviation - 1990/11
Page Numbers: 6, 8, 10, 12, 210, 212
Celebr tion building charaot 22 STITS PLAYBOY 1/3 SCALE 88 J-3 CUB 1/5 SCALE 85 About Engine Intake Noise Ive read numerous articles letters re cently model aircraft noise think James Wilsons article Gopher Canyon August issue formative Ive come across Theres lot said about propeller noise airframe noise exhaust noise far Ive read nothing about intake noise know insignificant Any has ridden two-stroke motorcy cle air cleaner/silencer removed knows Have noticed that charts showing Continued page 8 Goodbye THIS iS MY LAST ISSUE am retiring after being publisher maga zine 16 years last 10 also editor Putting out magazine month has lot work what will remember will pleasant associations have readers authors con tributing editors AMA officers AMA HO personnel especially mem bers magazine staff Without question some finest people world can hope magazine has contributed some way readers enjoyment airplane model ing during tenure has goal am retiring Its simply mat ter conditions right Im exactly spring chicken No pushing out giving problem leaving totally friendly fact provided manage ment substantial advance notice intentions could work toward orderly transition Ross McMullen long role sociate editor will charge upon departure expect will continue make improvements maga zine has support Carl R Wheeley 6 Model Aviation ditor letters will carefully considered general Interest used Send Model AviatIon 1810 Samuel Morse Dr Reston VA 22090 STINSON SR-B 1/5 SCALE 100 PILATUS PORTER GIANT SCALE 98 WACO 10PIPER SUPER CUB 1/5 SCALE 731/4 SCALE 107 MONOCOUPE 90ACORBEN SUPER ACE 1/4 SCALE 96114 SCALE 80 TAYLORCRAFTCURTISS ROBIN CHALLENGER GIANT SCALE 901/5 SCALE 98 Davey Systems 3 REAT SPORT-SCALE IPES Designed 40-60 two-cycle 60-90 four-cycle engines 40-size electric motors three feature box type construction extensive prefabrication quick assembly Also included full size plans step-by-step instruc tions hardware preformed bolt-on landing gear bolt-on wings prepackaged small parts STAMPE SV4 famous French aeroba tic primary trainer Preformed welded wire wing cabane vacuum formed cowl 56 span 1000 sq area 61h 7 lb flying weight GREAT LAKES SPECIAL beautiful rendition classic aerobatic biplane preformed wire cabane struts vacuum formed cowl wheel pants precut tail feathers 53 top 48 bottom wing 798 sq area 6 61/2 lb flying weight STEARMAN 75 PT-17/N25-3 gorgeous copy famous trainer crop sprayer aerobatic show stopper Preformed wire cabane struts precut tail feathers 51 top 48 bottom wings 750 sq area 6 6/2 lb flying weight IPAVEY675 TOWER LANE YSTEMSWEST CUES TER PA 1930 oRPORATIoN 215-430-8645 noise levels different quadrants around model indicate highest noise levels straight ahead exhaust usually points rear Propeller noise ra diates tips Perhaps has sumed noise front pro peller think bears re-examina tion propeller noise such big factor Electrics run similar speeds glow engines similar props much quieter Editor Testing North Carolina State University did agree See four-part report De cember 1989 though March 1990 issues think time intake noise con sidered approaches reduce ex amined case front-intake engines wont simple matter Rear-intake de signs should lend themselves some pretty interesting ideas Testing should done first comparing front- rear-intake engines similar size power output same prop same rpm Chart noise level distri bution around see distribu tion significantly different differ ence noticeable examination jus tified Perhaps engine manufac turers importers would willing such testing make findings avail able consider hope provides food thought someone can something about Gosh knows need info can get about make sport acceptable greatest numbers Rick Murray Portland OR Searching memory recall Tore Paulsen Norway using carbu retor muffler front-intake engine way back 1977 RC Aerobatics World Championships Springfield OH aircraft noticeably quieter others year much good ef fect attributable carburetor muf fler can guessed expect Paulsen good handle pects model aircraft sound Maule M-5 am pleased submit photos Quar ter Scale RC aircraft STOL Maule M-5 Lunar Rocket Specifications Wingspan 93 fuselage length 72 power Quadra Q35X glow total model weight dry 250 lb covering Oracover radio Futaba Conquest Continued page 10 8 Model Aviation Note readers Bob Kopskls monthly RC Electrics column Due personal reasons Bob temporarily unable answer correspondence timely manner Have patience please resist sending him additional mail re quiring response will com pound problem info will ap pear December 1990 column 0 28 KITS TO CHOOSE FROM /5 SCALE Wing Span72 Wing Area 1530 sq Weight12-l3Ibs Engine75-go 2c 90-12 4c / CONTACT YOUR LOCAL DEALER WACO YMF 1/6 SCALE WingSpan ing Area960 Sq Weight 8 lbs Engine 61 2c 90 4c MADE IN THE USA MAFREE COCKPIT KIT Receive FREE cockpit kit PICA standoff scale model purchased between September 1 1990 November 301990 sending proof-of-purchase PICA postmarked no later December31 1990 Proof-of-purchase end label kit box original bill sale will no exceptions dates offer bill sale must clearly show dealers name address No copies bill sale will accepted Void prohibited law coupon must accompany request NAME ____________________________________________________________[v32][b16231225151000]]LA1fl ESS CALE SIZE ____________ CITY STATE ZIP PICA ENTERPRISES INC NE 188th STREET MIAMIFLORIDA 331800305 935-1436 scratch-built M-5 Model Avia tion plans No 356 $1200 works six months compares 11 months first M-5 first Quarter Scale model am process doing lot ground preflight testing Maule its off wild blue yonder new model handles like first should honey flier Bob McCann Jackson MI Spiral Stability article Spiral Stability Bowl Effect Part 1 September 1990 sue interesting well done ever order misleading should also have titled ilplanes because briefly men tions vertical tail no specific guide its size paramount importance FF powered models gas- rubberpowered follows 1During very steep straight-up climb vertical tail size important item Dihedral essentially no help 2If vertical tail too large Continued page 12 IrTiWBBoxi 063 Lorain Ohio 44055 PhonA 216 282-8354 PEANUT SCALE Piper Vagabond Piper Cub Stinson 125 1924 Farman Outdoor kits . $795 OUTDOOR PEANUT Super SIe. $795 NEW Micro X Hornet P-30. 81395 SPORT SCALE PC-6 Porter Taylor Craft Stinson Voyager Rubber CO Power Kits 8995 SPORT MODELS An Embryo Model 18 Span designed wini beginners experts 8895 HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft$795 True Olde Japanese Tissue 10 3 colors$995 Japanese Tissue 12 6 colors$695 Microfilm *496 Glue- $195 Solvent -*175 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thru 085 .. size $250 3/32 thru 5132 .. size $275 winder 61 Mark 1161 5 Complete Line Brown CO Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage ostage $250 COMPLETE CATALOG 10 Model Aviation U HOBBY FOAM STRIPS Factory DIrect Clubs Serious Enthusiasts CLEARANCE SPECIALS PVC WHITE Super sticky 2 sides mount radios servos switches sand paper tools hundreds other uses Lifetime supply 36 yd roll 1 wide 1/16 thick$ 1595 Club case 10 rolls$12495 NEOPRENE WING seatinggasket highest quality adhesive side 1/B thick wide 13 long 25 pieces 5 club 250 pieces $1995 HOBBY KNIFE Large 6 handle break away blade renews tip 6 times ades case included $350 DISPOSABLE MIXING TRAYS Size 5 square metal wood spatulas epoxies putties etc 1 pkg 6 trays 12 spatulas 3 packages Dealer Inquiries Invited Include $200 postage handling Same price size order New York State Residents add Sales Tax AMP INC PO Box 793 Deer Park NY 11729 Narrow uana u MVY ix vniui MIVIM 1Sticker Servo Reversing much b cx Narrow Band Rx work 1991 20 KHZ spacings available new 72 Freqs I Improved CE-9C Micro Servo $4595I SUPER-MICRO SYSTEM PRICES 72MHZ 12 OH 2 Servos 237 OZ$24495 13 CH 3 Servos 281 OZ$29145 I 4 OH 4 Servos 325 OZ33895 5 OH 4 Servos 326 OZI34995 TX Dual Rates $1500Mixer $3995 ISystem S & H $975___I G-MARKO3RIC&061 RIG PLUS I SPARES ARE NOW IN STOcIK ___I ICATALOG $100 USA $300 Foreign Add Equipment Sales Tax Calif Prices Cash Cards 5% More ViSAII I20% Deposit-COD steep straight climb cannot achieved model will inevitably roll off less steep spiraling climb less altitude achieved larger vertical tail worse will 3 The vertical tail must small enough front fin effect spinning tractor propeller will just slightly overcome produce slight directional instabil ity allowing very steep straight-up climb pusher models cannot climb straight up front finwhich retracts glide 4 The acceptable vertical tail size found field successively cutting away until steep straight climb can achieved Too much cutting away will cause Dutch roll troubleseven violent roll crash right after launching starting guide size just barely large enough produce no hint Dutch roll glide ie numerous hand-launched glide tests FF Scale models often have too large vertical tail small dihedral Free ing hinging rudder portion float freely 450 both directions often ade quate prevent spiral instability deviation scale size Further helpful discussions about sub ject modeler book Mak ing Scale Model Airplanes Fly Air craft Data Box 763576 Dallas TX 75224 William F McCombs Dallas TX Continued page 210 12 Model Aviation TAKE THE HOBBY SHOP HOME WITH YOUE THE 14th ANNUAL RADIO CONTROL BUYERS GUIDE reference guide oil R/C hobbies Browse through guide find items need youll know just what ask favorite hobby shop RADIO CONTROL BUYERS GUIDE lets turn wish list shopping list knowing whats available con plan new projects improve existing projects Price formation also helps odd up just whot plans will cost Look RADIO CONTROL BUYERS GUIDE local hobby shop call 800-446-5489 weekdays 830 500 CST order RADIO CONTROL BUYERS GUIDE supports Academy Model Aeronautics AMA donating $100 copy guide purchase authorize donation AMA mall hobby shop reciept coupon below Kalmbach Order direct using coupon calling 800-446-5489 OSSOO@ O@@@OSSO@@ ... 6 OOO@@OO 66666 Ta order send Dept 0196 RADIO CONTROL BUYERS GUIDE PO Box 1612 WaukeshaWI 53187-1612 VESI Id like order _____ RADIO CONTROL BUYERS GUIDES #12092 $ ______ ent enclosed ge account Name__________________________________________________ Street______________________________________________________[v33][b22021205153010410]] Oily State Zip Country Charge ercard ican Express mm $15 Card#________________________ Exp Date_____________ Signature Include postage handling US $150 canadian foreign add 15% minimum S3 Make payment US funds Wisconsin residents add 5% sales fax Price subject changeDept 0196 S CANNON Phone 18051581-5081 RIO SYSTEMS 2828 cochran st Soite 281 Sim Vailey CA 93065I D/~YSTEMS MADE IN READY TO FLY 1/8 SCALE TOP GUN BULLDOG 149 No except will know ARF Info Orders 914-429-3484 800-628-3484 CAMBRIDGE MODEL AIRCRAFT PO Box 26 Norwood N J 07648 Introducing SABER Wing Span 121 Airfoil SD7037 Obechi Sheeting Completed Fiberglass Fuselage Send 2 stamps copy Catalog showing complete line Multichannel Gliders DODGSON DESIGNS -21230 Damson Road Bothell WA 98021 Phone 206-776-8067 ub off speed mass can also de fensive tool flier takes off oppo nents whole streamer early flight normally has scramble remaining time trying avoid giving away bunch cuts situation flier has Soviet-style model has option just whacking other guys plane flier already 100 points up cut other guy probably will lose lots time ground other guy sends up spare whack too SUPER SHARK TORPEDO brutal seemingly unsports manlike way fly Combat thats way its done insist flying fragile models theyll make confetti out British star Mike Whillance has picked up nickname Whacker Whil lance Soviet-style models use Second-placer Mervyn Jones used So viet kits hed acquired Leningrad Mervyn used rear-intake Nelson engines compromise leading edge SCORE DnmcT HIT WITH ThE NEW SUPER SHARK TORPEDO AUTOMAI1CMOIOR START AT LAUNCH AND SHUT OFF AT TARGET NICAD-540 MOTOR POWER 25 MPH 300 YAJtD LANGE PVC PIPE BODY HR BUILD MOUNT AND LAUNCH SYSTEM INCLD GREAT ON FLOAT PLANES Put real action R/G get thrill scaring direct hit sending $695 torpedo plan set COMBAT R/G 10241 Ridgewood El Paso TX 79925 GLOW DESIGNED PLUG Puts mc e St ng n engine FOR LONGER HIGHER5 Get starts GloBee Unique flat-wound spiral coil element anc high temperature glass-to-metal seal add up faster ignition increased RPM GloBee plugs specified original engine manufacturers purchased over over again Pylon control line racers find GloBee plugs best GloBee plugs designed fit popular engines used today unavailable locally write call Twinn-K collect pricing & delivery information & FREE Catalog MAKE THE GLOBEE / INDY CONNECTION Twinn-K Inc 10296 W Washington St Indianapolis IN 46231 Telephone 317-839-6579FAX 317-839-8928 210 Model Aviation spar order inset engine enough model balance correctly other models good enough win So viet design appropriate tactics has percentages its side US think winning World Championships simply matter beat ing Soviets Actually out standing fliers other countries Hen ning Forbech Denmark teammate Bjarne Schou Hakan Ostman Sweden Roland Forstner Germany fa miliar names 1984 performances World Champs US theyre excellent pilots British team ex tremely strong time Soviets seem have depth talent other country Americans surely dont take backseat Europeans game seems played little differently over Elimination matches seemed drag af ter Americans lost eventual win ner Viacheslav Belaiev probably deservet anyone else field Tht British took second individually thc second time row Mervyn Jones whc took second-place honors worsi luck match Belaievwhich Mer vyn would have won just flying arounc getting air time after exchange oi cuts kills things two mod els crash own because contro horn came loose airborne Predictions next time chance il crap shoot like Control Line Combat responding advertisers mention read about Model Aviation Letters Editor Continued page 12 Original Esquire Enclosed please find photo Es Continued page 21 New Cutting Edge Open Class Soariuf Performance RC Sailplane spans 76 uses twist-wing control Requires RC system elevon mixing function four servos No 670 Limitation $675 CL Profile intermediate Stunt trainer 29140 power spans 51 No 671 Cessna Cardinal $575 FF Reminder Scale sport flier power spans 39 No 672 Krackerjac $1375 RC Updated version pioneer RC sport plane spans 74 Uses 40160 two-stroke 40/60 four-stroke engines Two plan sheets No 193StIletto CL Slum model McDonald winoer 1976 1980 1982 FAt World Clrampo$ 375 No 262Crashmaster CL Crash-proof traloer two oizes19130 aod 35140 power$ 125 No 3101930 Fleet BIplane BC Sport Scale 35/40 4-clranoel Wngspan 56 in. scale Two oheelsS 625 No 314Drake II BC Ken Willards flying boat tar 3-channel 15-power Fly land removable gear$ 375 No 326Taylor Cub BC Don SrolIs Schoolyard-Scale 0490 2-3 channel Spans 50 m$ 350 No 332Zephyr BC Smaf 2-channel glider hand-launch tow Ihernial slope soaringS 200 No 386 Laser 200 BC Sport Scale replica chaorpionslrip Aerobalic filer Uses 40 power 4-5 chasnel Two sheets $ 1075 oNo 4471/2A MIle AmerIca BC Old-Toner WA Texaco model tar 049 glow 2-channels$650 oNo 4604-40 BC Shoulder-wing sport filer tar 4-cycle 40-size engine 4 channels$650 0 NNo 465Blue Max II BC Fan-fly sportoter 40-san engines spans 52 Lightweight sirectare$700 533Cessna C-37 BC Schoolyard Scale fareoun 30s plane br 049110 power 2-dr spans 42 inS500 No939SImIlar Stow-MotIon 15 BC Takos flying wing tar 15 engines spans 600 noes 3-dr BC5350 No 569Elecerosorewie BC Electric aembalic plane spoon 44 ones 06 motorS550 No 57215-260 BC Sport Scale Aerolliallc plane tar 4-stroke 60/65 power spons 0010S1100 CNo 576Serandlpltyl FF Indoor EZO record-holder spans 1771 in$325 Fda 578Scinwelzer 1-269 BC Onarler-scale Saliplane spans 125 Two plan sheetsS1475 No 581Gee Bee Model Y BC Golden Age Racer spans 7210 scale tar 60 power Three plan sheets$1175 0 0 No 566Snapdragon BC Fen-fly/sporlster tar 25130 engines spans 45 inS600 0 86 sh BC Slope-Soadeg Sailplane spans 41 ones 2 BC channels No593Taylorcrsft BC Sport Scale lighlplane haNds Olandard 2-placar clipped-anna ror show stonIer Spans ether 70 fl 0or 58A 30/40 two-strobe 40/48 tour-stroke engoro Two plan shoots docoroentationS1000 58Coronet 150 BC-Assist Old-Timor enlarged 155k spans 72 asas 40-size 4-stroke/30-size 2-strokeS850 tO No 603Sparrow Hawk P30 FE Corepetition rehher-pawer plane won 87 Hats Spans 300S225 E 0No 607curelss Seagull BC Giant Scale biplane spans 90 eses Onadra/Zeeoah power Three plan sheets no doc$2490 No 609Taperwlng BC WA Pylon Racer spano 29 Plan plen parts leasplato sheel5 600 inNo 610Protobype BC Spent biplane spans 48 axes 45/2-cycle 8014-cycle powerS 650 No 619KeIth RIder R4 FF Scale Golden Age racer rebber power spans 18 inS 300 oENo 620GImlet 40 BC SporI/Paltero plane spans 6010 45150 engine 2 sheets$ 1100 zmNo 623Henderson Longster BC Oearlor-scale 1933 Saver spans 9050 tar 4-stroke 40/48 engine 3 plan shl no dec$ 1650 CiNo624Keleher Lavk BC Onarler-scale howehait spans 60 far 60/90 4-stroke power 2 plan sheets no decS 1100 050No626Sweepee BC Spart/Paltore caoards toneard-swept wing spans 6410. noes 40 power 2 plan sheetsS 1300 No628Prlnne Cut BC SporI/Aerobatic plane spoon 00 in. ones Onadro 35/40-slan power Two plan sheets$1300 oNo 930OrigInal Fly Baby BC Old-Tinier spans 72 oses 19125 2-cycle 404-cycle power 2 plan sheets$ 1150 No 635The Gsmbler FE Indoor Bostonian robber-power cabin plane spoon 15% inS 2 00 CNo 636Keytwo BC Tn-geared law-wing sportster fnr 20/25 power spans 44 inS 575 -o 0 No936 OwlRacerCLAScaleBacertorO4Opowerspans2Oin$ 225 C tONo 629 Skyvolt BC Tn-geared Electric anrohalic spartster tsr 98115 power spans 50' inS fiSt N No 641 LII Ole RelIable BC Old-lireur sport filer spans 52 engines5 575 tOn No 644 Bellanca columbIa BC Schoolyard Scale tar 2 BC channels engow Wingspan 48 inS 575 esNo 646 WInter Hawk FF Bebber-power Conpa ditisor coropetitino plane spans 47 in$ 375 E b No 646 Curtlas OC-2 FE SastIs Goldoor Gas Flying Scale biplane ones electoc power spans 24 HiLine Mini-it reolnr $ 325 0No 693 47/66 RC SpecIal BC Aerehatic sport plane 40 power spans 61n 3 plan sheets5 1075 No 651 consortIum BC Hand-bosch HI-Start Glider spans 60 in. S 650 52 Der Fledermaun BC Low-wing sport plane ton 20125 power spans 55 in5 675 C 0No 664 Tannecat BC Tnainer/sportster styled like F14 spans 68 40161 power Four plan sheetsS 1525 0No 655 Aseroatar FE AMA Class AS Gas plane spans 67 noes 325/350cc powerS t00 No 657 Super SquIre BC Trainer ton 35/40 2-stroke 53 4-stroke power spans 56 in 5 750 CNo 656 Shuolkeon Streak CL Trainer uses 2-line Monoline control spans 17 power$ 225 59 BoomoxFFWabefialdBabbercorepettiinnplanenpans54inS 400 No 660 Volkagslane BC Electric-powered sportoler 06 orator spans 50 2 plan shts S 925 No 581 Embmy-OmstIc FF Erebrys Endaronco robber-power plane spans 20 in$ 200 62 BookIes CL Scale antique canard pasher biplane spans 42 2 plan streetsS 1100 No583 Pea Patch BC Sporlsler spans 60 in. noan 40/50 4-stroke power 2 plan sheetsS 900 No 664 Stubs Stunt CL WA StonIer nemiscale spans 37 in 5 500 o No 665 ConscIentIous Objector FE Muidhill flubber corepetition plans spans 50 tat5 575 3 hNo 666 BlItz BC Sportster spans 48 ones hot 28/32 power 2 plan sheelsS 1075 0 iSNo 667 AT6CLSeraincalopastileSlunttrtor35/4Opowtrspans47inS 575 0 No 666 Slow Worm 432 FF AMA Class corepetitian plano tar 00/15 power spans 54 RatS 500 0005 tO cle numbers plans wish order best handling please include re 00 quests payment some other service plans order 193262310314326332386447 460465533539569572576578 CO -581586588593598603607609 0610619620623624626628630 0635636638639641644646648 650651652654655657658659 C0660661662663664665666667 668669670671672 __ Plan price includes first class postage US delivery Which Air Mai over 300 miles orders non-US address 16858 add $250 Air Mail osta e handlin tsr Ian e Check money order payable US funds drawn US bank Model Aviation AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 Weeks delivery ase print carefullyEnclosed $ E ___________________________________________ AMA No _______________ STREET en 0 CITY LSTZIPj quire airplane referred July 1990 issue page 25 has distinctive Esquire triangular block 05 15 Max engine model excellent condition mi nor bruises bought Esquire already built very old whole model except wing has paint finish Brad Greenwood Atchison KS Cloud Seeding Models After four years drought losing full-grown trees native shrubbery canyon wells dry moisture-laden clouds bring thunder lightningbut no rain readers have ideas RC model could used small cloud-seeding operation such thing possible modelers provide service will much demand parched Southern California other drought-stricken areas country Mrs Ivan C Kelley Ruth E Kelleybut Ivans modeler Canyon Country CA Propeller Drill Jigs Self aligns existIng prop hole webra Bully a-Dolmar Zenos um II SunCraft 1617 LoaTnrosnoaAlbuq NM 87102 505-842-9646 TOURNAMENT CHAMPIONS Finals Las Vegas NV Nov 9-11 Special Discounted Airfare call rena Gorny CONTEMPORARY TRAVEL 000-336-0033 Outside NYS 516-360-3663 NYS rum woos U L ENTERPRISL5 212 Model Aviation $1696/ 65
Edition: Model Aviation - 1990/11
Page Numbers: 6, 8, 10, 12, 210, 212
Celebr tion building charaot 22 STITS PLAYBOY 1/3 SCALE 88 J-3 CUB 1/5 SCALE 85 About Engine Intake Noise Ive read numerous articles letters re cently model aircraft noise think James Wilsons article Gopher Canyon August issue formative Ive come across Theres lot said about propeller noise airframe noise exhaust noise far Ive read nothing about intake noise know insignificant Any has ridden two-stroke motorcy cle air cleaner/silencer removed knows Have noticed that charts showing Continued page 8 Goodbye THIS iS MY LAST ISSUE am retiring after being publisher maga zine 16 years last 10 also editor Putting out magazine month has lot work what will remember will pleasant associations have readers authors con tributing editors AMA officers AMA HO personnel especially mem bers magazine staff Without question some finest people world can hope magazine has contributed some way readers enjoyment airplane model ing during tenure has goal am retiring Its simply mat ter conditions right Im exactly spring chicken No pushing out giving problem leaving totally friendly fact provided manage ment substantial advance notice intentions could work toward orderly transition Ross McMullen long role sociate editor will charge upon departure expect will continue make improvements maga zine has support Carl R Wheeley 6 Model Aviation ditor letters will carefully considered general Interest used Send Model AviatIon 1810 Samuel Morse Dr Reston VA 22090 STINSON SR-B 1/5 SCALE 100 PILATUS PORTER GIANT SCALE 98 WACO 10PIPER SUPER CUB 1/5 SCALE 731/4 SCALE 107 MONOCOUPE 90ACORBEN SUPER ACE 1/4 SCALE 96114 SCALE 80 TAYLORCRAFTCURTISS ROBIN CHALLENGER GIANT SCALE 901/5 SCALE 98 Davey Systems 3 REAT SPORT-SCALE IPES Designed 40-60 two-cycle 60-90 four-cycle engines 40-size electric motors three feature box type construction extensive prefabrication quick assembly Also included full size plans step-by-step instruc tions hardware preformed bolt-on landing gear bolt-on wings prepackaged small parts STAMPE SV4 famous French aeroba tic primary trainer Preformed welded wire wing cabane vacuum formed cowl 56 span 1000 sq area 61h 7 lb flying weight GREAT LAKES SPECIAL beautiful rendition classic aerobatic biplane preformed wire cabane struts vacuum formed cowl wheel pants precut tail feathers 53 top 48 bottom wing 798 sq area 6 61/2 lb flying weight STEARMAN 75 PT-17/N25-3 gorgeous copy famous trainer crop sprayer aerobatic show stopper Preformed wire cabane struts precut tail feathers 51 top 48 bottom wings 750 sq area 6 6/2 lb flying weight IPAVEY675 TOWER LANE YSTEMSWEST CUES TER PA 1930 oRPORATIoN 215-430-8645 noise levels different quadrants around model indicate highest noise levels straight ahead exhaust usually points rear Propeller noise ra diates tips Perhaps has sumed noise front pro peller think bears re-examina tion propeller noise such big factor Electrics run similar speeds glow engines similar props much quieter Editor Testing North Carolina State University did agree See four-part report De cember 1989 though March 1990 issues think time intake noise con sidered approaches reduce ex amined case front-intake engines wont simple matter Rear-intake de signs should lend themselves some pretty interesting ideas Testing should done first comparing front- rear-intake engines similar size power output same prop same rpm Chart noise level distri bution around see distribu tion significantly different differ ence noticeable examination jus tified Perhaps engine manufac turers importers would willing such testing make findings avail able consider hope provides food thought someone can something about Gosh knows need info can get about make sport acceptable greatest numbers Rick Murray Portland OR Searching memory recall Tore Paulsen Norway using carbu retor muffler front-intake engine way back 1977 RC Aerobatics World Championships Springfield OH aircraft noticeably quieter others year much good ef fect attributable carburetor muf fler can guessed expect Paulsen good handle pects model aircraft sound Maule M-5 am pleased submit photos Quar ter Scale RC aircraft STOL Maule M-5 Lunar Rocket Specifications Wingspan 93 fuselage length 72 power Quadra Q35X glow total model weight dry 250 lb covering Oracover radio Futaba Conquest Continued page 10 8 Model Aviation Note readers Bob Kopskls monthly RC Electrics column Due personal reasons Bob temporarily unable answer correspondence timely manner Have patience please resist sending him additional mail re quiring response will com pound problem info will ap pear December 1990 column 0 28 KITS TO CHOOSE FROM /5 SCALE Wing Span72 Wing Area 1530 sq Weight12-l3Ibs Engine75-go 2c 90-12 4c / CONTACT YOUR LOCAL DEALER WACO YMF 1/6 SCALE WingSpan ing Area960 Sq Weight 8 lbs Engine 61 2c 90 4c MADE IN THE USA MAFREE COCKPIT KIT Receive FREE cockpit kit PICA standoff scale model purchased between September 1 1990 November 301990 sending proof-of-purchase PICA postmarked no later December31 1990 Proof-of-purchase end label kit box original bill sale will no exceptions dates offer bill sale must clearly show dealers name address No copies bill sale will accepted Void prohibited law coupon must accompany request NAME ____________________________________________________________[v32][b16231225151000]]LA1fl ESS CALE SIZE ____________ CITY STATE ZIP PICA ENTERPRISES INC NE 188th STREET MIAMIFLORIDA 331800305 935-1436 scratch-built M-5 Model Avia tion plans No 356 $1200 works six months compares 11 months first M-5 first Quarter Scale model am process doing lot ground preflight testing Maule its off wild blue yonder new model handles like first should honey flier Bob McCann Jackson MI Spiral Stability article Spiral Stability Bowl Effect Part 1 September 1990 sue interesting well done ever order misleading should also have titled ilplanes because briefly men tions vertical tail no specific guide its size paramount importance FF powered models gas- rubberpowered follows 1During very steep straight-up climb vertical tail size important item Dihedral essentially no help 2If vertical tail too large Continued page 12 IrTiWBBoxi 063 Lorain Ohio 44055 PhonA 216 282-8354 PEANUT SCALE Piper Vagabond Piper Cub Stinson 125 1924 Farman Outdoor kits . $795 OUTDOOR PEANUT Super SIe. $795 NEW Micro X Hornet P-30. 81395 SPORT SCALE PC-6 Porter Taylor Craft Stinson Voyager Rubber CO Power Kits 8995 SPORT MODELS An Embryo Model 18 Span designed wini beginners experts 8895 HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft$795 True Olde Japanese Tissue 10 3 colors$995 Japanese Tissue 12 6 colors$695 Microfilm *496 Glue- $195 Solvent -*175 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thru 085 .. size $250 3/32 thru 5132 .. size $275 winder 61 Mark 1161 5 Complete Line Brown CO Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage ostage $250 COMPLETE CATALOG 10 Model Aviation U HOBBY FOAM STRIPS Factory DIrect Clubs Serious Enthusiasts CLEARANCE SPECIALS PVC WHITE Super sticky 2 sides mount radios servos switches sand paper tools hundreds other uses Lifetime supply 36 yd roll 1 wide 1/16 thick$ 1595 Club case 10 rolls$12495 NEOPRENE WING seatinggasket highest quality adhesive side 1/B thick wide 13 long 25 pieces 5 club 250 pieces $1995 HOBBY KNIFE Large 6 handle break away blade renews tip 6 times ades case included $350 DISPOSABLE MIXING TRAYS Size 5 square metal wood spatulas epoxies putties etc 1 pkg 6 trays 12 spatulas 3 packages Dealer Inquiries Invited Include $200 postage handling Same price size order New York State Residents add Sales Tax AMP INC PO Box 793 Deer Park NY 11729 Narrow uana u MVY ix vniui MIVIM 1Sticker Servo Reversing much b cx Narrow Band Rx work 1991 20 KHZ spacings available new 72 Freqs I Improved CE-9C Micro Servo $4595I SUPER-MICRO SYSTEM PRICES 72MHZ 12 OH 2 Servos 237 OZ$24495 13 CH 3 Servos 281 OZ$29145 I 4 OH 4 Servos 325 OZ33895 5 OH 4 Servos 326 OZI34995 TX Dual Rates $1500Mixer $3995 ISystem S & H $975___I G-MARKO3RIC&061 RIG PLUS I SPARES ARE NOW IN STOcIK ___I ICATALOG $100 USA $300 Foreign Add Equipment Sales Tax Calif Prices Cash Cards 5% More ViSAII I20% Deposit-COD steep straight climb cannot achieved model will inevitably roll off less steep spiraling climb less altitude achieved larger vertical tail worse will 3 The vertical tail must small enough front fin effect spinning tractor propeller will just slightly overcome produce slight directional instabil ity allowing very steep straight-up climb pusher models cannot climb straight up front finwhich retracts glide 4 The acceptable vertical tail size found field successively cutting away until steep straight climb can achieved Too much cutting away will cause Dutch roll troubleseven violent roll crash right after launching starting guide size just barely large enough produce no hint Dutch roll glide ie numerous hand-launched glide tests FF Scale models often have too large vertical tail small dihedral Free ing hinging rudder portion float freely 450 both directions often ade quate prevent spiral instability deviation scale size Further helpful discussions about sub ject modeler book Mak ing Scale Model Airplanes Fly Air craft Data Box 763576 Dallas TX 75224 William F McCombs Dallas TX Continued page 210 12 Model Aviation TAKE THE HOBBY SHOP HOME WITH YOUE THE 14th ANNUAL RADIO CONTROL BUYERS GUIDE reference guide oil R/C hobbies Browse through guide find items need youll know just what ask favorite hobby shop RADIO CONTROL BUYERS GUIDE lets turn wish list shopping list knowing whats available con plan new projects improve existing projects Price formation also helps odd up just whot plans will cost Look RADIO CONTROL BUYERS GUIDE local hobby shop call 800-446-5489 weekdays 830 500 CST order RADIO CONTROL BUYERS GUIDE supports Academy Model Aeronautics AMA donating $100 copy guide purchase authorize donation AMA mall hobby shop reciept coupon below Kalmbach Order direct using coupon calling 800-446-5489 OSSOO@ O@@@OSSO@@ ... 6 OOO@@OO 66666 Ta order send Dept 0196 RADIO CONTROL BUYERS GUIDE PO Box 1612 WaukeshaWI 53187-1612 VESI Id like order _____ RADIO CONTROL BUYERS GUIDES #12092 $ ______ ent enclosed ge account Name__________________________________________________ Street______________________________________________________[v33][b22021205153010410]] Oily State Zip Country Charge ercard ican Express mm $15 Card#________________________ Exp Date_____________ Signature Include postage handling US $150 canadian foreign add 15% minimum S3 Make payment US funds Wisconsin residents add 5% sales fax Price subject changeDept 0196 S CANNON Phone 18051581-5081 RIO SYSTEMS 2828 cochran st Soite 281 Sim Vailey CA 93065I D/~YSTEMS MADE IN READY TO FLY 1/8 SCALE TOP GUN BULLDOG 149 No except will know ARF Info Orders 914-429-3484 800-628-3484 CAMBRIDGE MODEL AIRCRAFT PO Box 26 Norwood N J 07648 Introducing SABER Wing Span 121 Airfoil SD7037 Obechi Sheeting Completed Fiberglass Fuselage Send 2 stamps copy Catalog showing complete line Multichannel Gliders DODGSON DESIGNS -21230 Damson Road Bothell WA 98021 Phone 206-776-8067 ub off speed mass can also de fensive tool flier takes off oppo nents whole streamer early flight normally has scramble remaining time trying avoid giving away bunch cuts situation flier has Soviet-style model has option just whacking other guys plane flier already 100 points up cut other guy probably will lose lots time ground other guy sends up spare whack too SUPER SHARK TORPEDO brutal seemingly unsports manlike way fly Combat thats way its done insist flying fragile models theyll make confetti out British star Mike Whillance has picked up nickname Whacker Whil lance Soviet-style models use Second-placer Mervyn Jones used So viet kits hed acquired Leningrad Mervyn used rear-intake Nelson engines compromise leading edge SCORE DnmcT HIT WITH ThE NEW SUPER SHARK TORPEDO AUTOMAI1CMOIOR START AT LAUNCH AND SHUT OFF AT TARGET NICAD-540 MOTOR POWER 25 MPH 300 YAJtD LANGE PVC PIPE BODY HR BUILD MOUNT AND LAUNCH SYSTEM INCLD GREAT ON FLOAT PLANES Put real action R/G get thrill scaring direct hit sending $695 torpedo plan set COMBAT R/G 10241 Ridgewood El Paso TX 79925 GLOW DESIGNED PLUG Puts mc e St ng n engine FOR LONGER HIGHER5 Get starts GloBee Unique flat-wound spiral coil element anc high temperature glass-to-metal seal add up faster ignition increased RPM GloBee plugs specified original engine manufacturers purchased over over again Pylon control line racers find GloBee plugs best GloBee plugs designed fit popular engines used today unavailable locally write call Twinn-K collect pricing & delivery information & FREE Catalog MAKE THE GLOBEE / INDY CONNECTION Twinn-K Inc 10296 W Washington St Indianapolis IN 46231 Telephone 317-839-6579FAX 317-839-8928 210 Model Aviation spar order inset engine enough model balance correctly other models good enough win So viet design appropriate tactics has percentages its side US think winning World Championships simply matter beat ing Soviets Actually out standing fliers other countries Hen ning Forbech Denmark teammate Bjarne Schou Hakan Ostman Sweden Roland Forstner Germany fa miliar names 1984 performances World Champs US theyre excellent pilots British team ex tremely strong time Soviets seem have depth talent other country Americans surely dont take backseat Europeans game seems played little differently over Elimination matches seemed drag af ter Americans lost eventual win ner Viacheslav Belaiev probably deservet anyone else field Tht British took second individually thc second time row Mervyn Jones whc took second-place honors worsi luck match Belaievwhich Mer vyn would have won just flying arounc getting air time after exchange oi cuts kills things two mod els crash own because contro horn came loose airborne Predictions next time chance il crap shoot like Control Line Combat responding advertisers mention read about Model Aviation Letters Editor Continued page 12 Original Esquire Enclosed please find photo Es Continued page 21 New Cutting Edge Open Class Soariuf Performance RC Sailplane spans 76 uses twist-wing control Requires RC system elevon mixing function four servos No 670 Limitation $675 CL Profile intermediate Stunt trainer 29140 power spans 51 No 671 Cessna Cardinal $575 FF Reminder Scale sport flier power spans 39 No 672 Krackerjac $1375 RC Updated version pioneer RC sport plane spans 74 Uses 40160 two-stroke 40/60 four-stroke engines Two plan sheets No 193StIletto CL Slum model McDonald winoer 1976 1980 1982 FAt World Clrampo$ 375 No 262Crashmaster CL Crash-proof traloer two oizes19130 aod 35140 power$ 125 No 3101930 Fleet BIplane BC Sport Scale 35/40 4-clranoel Wngspan 56 in. scale Two oheelsS 625 No 314Drake II BC Ken Willards flying boat tar 3-channel 15-power Fly land removable gear$ 375 No 326Taylor Cub BC Don SrolIs Schoolyard-Scale 0490 2-3 channel Spans 50 m$ 350 No 332Zephyr BC Smaf 2-channel glider hand-launch tow Ihernial slope soaringS 200 No 386 Laser 200 BC Sport Scale replica chaorpionslrip Aerobalic filer Uses 40 power 4-5 chasnel Two sheets $ 1075 oNo 4471/2A MIle AmerIca BC Old-Toner WA Texaco model tar 049 glow 2-channels$650 oNo 4604-40 BC Shoulder-wing sport filer tar 4-cycle 40-size engine 4 channels$650 0 NNo 465Blue Max II BC Fan-fly sportoter 40-san engines spans 52 Lightweight sirectare$700 533Cessna C-37 BC Schoolyard Scale fareoun 30s plane br 049110 power 2-dr spans 42 inS500 No939SImIlar Stow-MotIon 15 BC Takos flying wing tar 15 engines spans 600 noes 3-dr BC5350 No 569Elecerosorewie BC Electric aembalic plane spoon 44 ones 06 motorS550 No 57215-260 BC Sport Scale Aerolliallc plane tar 4-stroke 60/65 power spons 0010S1100 CNo 576Serandlpltyl FF Indoor EZO record-holder spans 1771 in$325 Fda 578Scinwelzer 1-269 BC Onarler-scale Saliplane spans 125 Two plan sheetsS1475 No 581Gee Bee Model Y BC Golden Age Racer spans 7210 scale tar 60 power Three plan sheets$1175 0 0 No 566Snapdragon BC Fen-fly/sporlster tar 25130 engines spans 45 inS600 0 86 sh BC Slope-Soadeg Sailplane spans 41 ones 2 BC channels No593Taylorcrsft BC Sport Scale lighlplane haNds Olandard 2-placar clipped-anna ror show stonIer Spans ether 70 fl 0or 58A 30/40 two-strobe 40/48 tour-stroke engoro Two plan shoots docoroentationS1000 58Coronet 150 BC-Assist Old-Timor enlarged 155k spans 72 asas 40-size 4-stroke/30-size 2-strokeS850 tO No 603Sparrow Hawk P30 FE Corepetition rehher-pawer plane won 87 Hats Spans 300S225 E 0No 607curelss Seagull BC Giant Scale biplane spans 90 eses Onadra/Zeeoah power Three plan sheets no doc$2490 No 609Taperwlng BC WA Pylon Racer spano 29 Plan plen parts leasplato sheel5 600 inNo 610Protobype BC Spent biplane spans 48 axes 45/2-cycle 8014-cycle powerS 650 No 619KeIth RIder R4 FF Scale Golden Age racer rebber power spans 18 inS 300 oENo 620GImlet 40 BC SporI/Paltero plane spans 6010 45150 engine 2 sheets$ 1100 zmNo 623Henderson Longster BC Oearlor-scale 1933 Saver spans 9050 tar 4-stroke 40/48 engine 3 plan shl no dec$ 1650 CiNo624Keleher Lavk BC Onarler-scale howehait spans 60 far 60/90 4-stroke power 2 plan sheets no decS 1100 050No626Sweepee BC Spart/Paltore caoards toneard-swept wing spans 6410. noes 40 power 2 plan sheetsS 1300 No628Prlnne Cut BC SporI/Aerobatic plane spoon 00 in. ones Onadro 35/40-slan power Two plan sheets$1300 oNo 930OrigInal Fly Baby BC Old-Tinier spans 72 oses 19125 2-cycle 404-cycle power 2 plan sheets$ 1150 No 635The Gsmbler FE Indoor Bostonian robber-power cabin plane spoon 15% inS 2 00 CNo 636Keytwo BC Tn-geared law-wing sportster fnr 20/25 power spans 44 inS 575 -o 0 No936 OwlRacerCLAScaleBacertorO4Opowerspans2Oin$ 225 C tONo 629 Skyvolt BC Tn-geared Electric anrohalic spartster tsr 98115 power spans 50' inS fiSt N No 641 LII Ole RelIable BC Old-lireur sport filer spans 52 engines5 575 tOn No 644 Bellanca columbIa BC Schoolyard Scale tar 2 BC channels engow Wingspan 48 inS 575 esNo 646 WInter Hawk FF Bebber-power Conpa ditisor coropetitino plane spans 47 in$ 375 E b No 646 Curtlas OC-2 FE SastIs Goldoor Gas Flying Scale biplane ones electoc power spans 24 HiLine Mini-it reolnr $ 325 0No 693 47/66 RC SpecIal BC Aerehatic sport plane 40 power spans 61n 3 plan sheets5 1075 No 651 consortIum BC Hand-bosch HI-Start Glider spans 60 in. S 650 52 Der Fledermaun BC Low-wing sport plane ton 20125 power spans 55 in5 675 C 0No 664 Tannecat BC Tnainer/sportster styled like F14 spans 68 40161 power Four plan sheetsS 1525 0No 655 Aseroatar FE AMA Class AS Gas plane spans 67 noes 325/350cc powerS t00 No 657 Super SquIre BC Trainer ton 35/40 2-stroke 53 4-stroke power spans 56 in 5 750 CNo 656 Shuolkeon Streak CL Trainer uses 2-line Monoline control spans 17 power$ 225 59 BoomoxFFWabefialdBabbercorepettiinnplanenpans54inS 400 No 660 Volkagslane BC Electric-powered sportoler 06 orator spans 50 2 plan shts S 925 No 581 Embmy-OmstIc FF Erebrys Endaronco robber-power plane spans 20 in$ 200 62 BookIes CL Scale antique canard pasher biplane spans 42 2 plan streetsS 1100 No583 Pea Patch BC Sporlsler spans 60 in. noan 40/50 4-stroke power 2 plan sheetsS 900 No 664 Stubs Stunt CL WA StonIer nemiscale spans 37 in 5 500 o No 665 ConscIentIous Objector FE Muidhill flubber corepetition plans spans 50 tat5 575 3 hNo 666 BlItz BC Sportster spans 48 ones hot 28/32 power 2 plan sheelsS 1075 0 iSNo 667 AT6CLSeraincalopastileSlunttrtor35/4Opowtrspans47inS 575 0 No 666 Slow Worm 432 FF AMA Class corepetitian plano tar 00/15 power spans 54 RatS 500 0005 tO cle numbers plans wish order best handling please include re 00 quests payment some other service plans order 193262310314326332386447 460465533539569572576578 CO -581586588593598603607609 0610619620623624626628630 0635636638639641644646648 650651652654655657658659 C0660661662663664665666667 668669670671672 __ Plan price includes first class postage US delivery Which Air Mai over 300 miles orders non-US address 16858 add $250 Air Mail osta e handlin tsr Ian e Check money order payable US funds drawn US bank Model Aviation AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 Weeks delivery ase print carefullyEnclosed $ E ___________________________________________ AMA No _______________ STREET en 0 CITY LSTZIPj quire airplane referred July 1990 issue page 25 has distinctive Esquire triangular block 05 15 Max engine model excellent condition mi nor bruises bought Esquire already built very old whole model except wing has paint finish Brad Greenwood Atchison KS Cloud Seeding Models After four years drought losing full-grown trees native shrubbery canyon wells dry moisture-laden clouds bring thunder lightningbut no rain readers have ideas RC model could used small cloud-seeding operation such thing possible modelers provide service will much demand parched Southern California other drought-stricken areas country Mrs Ivan C Kelley Ruth E Kelleybut Ivans modeler Canyon Country CA Propeller Drill Jigs Self aligns existIng prop hole webra Bully a-Dolmar Zenos um II SunCraft 1617 LoaTnrosnoaAlbuq NM 87102 505-842-9646 TOURNAMENT CHAMPIONS Finals Las Vegas NV Nov 9-11 Special Discounted Airfare call rena Gorny CONTEMPORARY TRAVEL 000-336-0033 Outside NYS 516-360-3663 NYS rum woos U L ENTERPRISL5 212 Model Aviation $1696/ 65
Edition: Model Aviation - 1990/11
Page Numbers: 6, 8, 10, 12, 210, 212
Celebr tion building charaot 22 STITS PLAYBOY 1/3 SCALE 88 J-3 CUB 1/5 SCALE 85 About Engine Intake Noise Ive read numerous articles letters re cently model aircraft noise think James Wilsons article Gopher Canyon August issue formative Ive come across Theres lot said about propeller noise airframe noise exhaust noise far Ive read nothing about intake noise know insignificant Any has ridden two-stroke motorcy cle air cleaner/silencer removed knows Have noticed that charts showing Continued page 8 Goodbye THIS iS MY LAST ISSUE am retiring after being publisher maga zine 16 years last 10 also editor Putting out magazine month has lot work what will remember will pleasant associations have readers authors con tributing editors AMA officers AMA HO personnel especially mem bers magazine staff Without question some finest people world can hope magazine has contributed some way readers enjoyment airplane model ing during tenure has goal am retiring Its simply mat ter conditions right Im exactly spring chicken No pushing out giving problem leaving totally friendly fact provided manage ment substantial advance notice intentions could work toward orderly transition Ross McMullen long role sociate editor will charge upon departure expect will continue make improvements maga zine has support Carl R Wheeley 6 Model Aviation ditor letters will carefully considered general Interest used Send Model AviatIon 1810 Samuel Morse Dr Reston VA 22090 STINSON SR-B 1/5 SCALE 100 PILATUS PORTER GIANT SCALE 98 WACO 10PIPER SUPER CUB 1/5 SCALE 731/4 SCALE 107 MONOCOUPE 90ACORBEN SUPER ACE 1/4 SCALE 96114 SCALE 80 TAYLORCRAFTCURTISS ROBIN CHALLENGER GIANT SCALE 901/5 SCALE 98 Davey Systems 3 REAT SPORT-SCALE IPES Designed 40-60 two-cycle 60-90 four-cycle engines 40-size electric motors three feature box type construction extensive prefabrication quick assembly Also included full size plans step-by-step instruc tions hardware preformed bolt-on landing gear bolt-on wings prepackaged small parts STAMPE SV4 famous French aeroba tic primary trainer Preformed welded wire wing cabane vacuum formed cowl 56 span 1000 sq area 61h 7 lb flying weight GREAT LAKES SPECIAL beautiful rendition classic aerobatic biplane preformed wire cabane struts vacuum formed cowl wheel pants precut tail feathers 53 top 48 bottom wing 798 sq area 6 61/2 lb flying weight STEARMAN 75 PT-17/N25-3 gorgeous copy famous trainer crop sprayer aerobatic show stopper Preformed wire cabane struts precut tail feathers 51 top 48 bottom wings 750 sq area 6 6/2 lb flying weight IPAVEY675 TOWER LANE YSTEMSWEST CUES TER PA 1930 oRPORATIoN 215-430-8645 noise levels different quadrants around model indicate highest noise levels straight ahead exhaust usually points rear Propeller noise ra diates tips Perhaps has sumed noise front pro peller think bears re-examina tion propeller noise such big factor Electrics run similar speeds glow engines similar props much quieter Editor Testing North Carolina State University did agree See four-part report De cember 1989 though March 1990 issues think time intake noise con sidered approaches reduce ex amined case front-intake engines wont simple matter Rear-intake de signs should lend themselves some pretty interesting ideas Testing should done first comparing front- rear-intake engines similar size power output same prop same rpm Chart noise level distri bution around see distribu tion significantly different differ ence noticeable examination jus tified Perhaps engine manufac turers importers would willing such testing make findings avail able consider hope provides food thought someone can something about Gosh knows need info can get about make sport acceptable greatest numbers Rick Murray Portland OR Searching memory recall Tore Paulsen Norway using carbu retor muffler front-intake engine way back 1977 RC Aerobatics World Championships Springfield OH aircraft noticeably quieter others year much good ef fect attributable carburetor muf fler can guessed expect Paulsen good handle pects model aircraft sound Maule M-5 am pleased submit photos Quar ter Scale RC aircraft STOL Maule M-5 Lunar Rocket Specifications Wingspan 93 fuselage length 72 power Quadra Q35X glow total model weight dry 250 lb covering Oracover radio Futaba Conquest Continued page 10 8 Model Aviation Note readers Bob Kopskls monthly RC Electrics column Due personal reasons Bob temporarily unable answer correspondence timely manner Have patience please resist sending him additional mail re quiring response will com pound problem info will ap pear December 1990 column 0 28 KITS TO CHOOSE FROM /5 SCALE Wing Span72 Wing Area 1530 sq Weight12-l3Ibs Engine75-go 2c 90-12 4c / CONTACT YOUR LOCAL DEALER WACO YMF 1/6 SCALE WingSpan ing Area960 Sq Weight 8 lbs Engine 61 2c 90 4c MADE IN THE USA MAFREE COCKPIT KIT Receive FREE cockpit kit PICA standoff scale model purchased between September 1 1990 November 301990 sending proof-of-purchase PICA postmarked no later December31 1990 Proof-of-purchase end label kit box original bill sale will no exceptions dates offer bill sale must clearly show dealers name address No copies bill sale will accepted Void prohibited law coupon must accompany request NAME ____________________________________________________________[v32][b16231225151000]]LA1fl ESS CALE SIZE ____________ CITY STATE ZIP PICA ENTERPRISES INC NE 188th STREET MIAMIFLORIDA 331800305 935-1436 scratch-built M-5 Model Avia tion plans No 356 $1200 works six months compares 11 months first M-5 first Quarter Scale model am process doing lot ground preflight testing Maule its off wild blue yonder new model handles like first should honey flier Bob McCann Jackson MI Spiral Stability article Spiral Stability Bowl Effect Part 1 September 1990 sue interesting well done ever order misleading should also have titled ilplanes because briefly men tions vertical tail no specific guide its size paramount importance FF powered models gas- rubberpowered follows 1During very steep straight-up climb vertical tail size important item Dihedral essentially no help 2If vertical tail too large Continued page 12 IrTiWBBoxi 063 Lorain Ohio 44055 PhonA 216 282-8354 PEANUT SCALE Piper Vagabond Piper Cub Stinson 125 1924 Farman Outdoor kits . $795 OUTDOOR PEANUT Super SIe. $795 NEW Micro X Hornet P-30. 81395 SPORT SCALE PC-6 Porter Taylor Craft Stinson Voyager Rubber CO Power Kits 8995 SPORT MODELS An Embryo Model 18 Span designed wini beginners experts 8895 HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft$795 True Olde Japanese Tissue 10 3 colors$995 Japanese Tissue 12 6 colors$695 Microfilm *496 Glue- $195 Solvent -*175 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thru 085 .. size $250 3/32 thru 5132 .. size $275 winder 61 Mark 1161 5 Complete Line Brown CO Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage ostage $250 COMPLETE CATALOG 10 Model Aviation U HOBBY FOAM STRIPS Factory DIrect Clubs Serious Enthusiasts CLEARANCE SPECIALS PVC WHITE Super sticky 2 sides mount radios servos switches sand paper tools hundreds other uses Lifetime supply 36 yd roll 1 wide 1/16 thick$ 1595 Club case 10 rolls$12495 NEOPRENE WING seatinggasket highest quality adhesive side 1/B thick wide 13 long 25 pieces 5 club 250 pieces $1995 HOBBY KNIFE Large 6 handle break away blade renews tip 6 times ades case included $350 DISPOSABLE MIXING TRAYS Size 5 square metal wood spatulas epoxies putties etc 1 pkg 6 trays 12 spatulas 3 packages Dealer Inquiries Invited Include $200 postage handling Same price size order New York State Residents add Sales Tax AMP INC PO Box 793 Deer Park NY 11729 Narrow uana u MVY ix vniui MIVIM 1Sticker Servo Reversing much b cx Narrow Band Rx work 1991 20 KHZ spacings available new 72 Freqs I Improved CE-9C Micro Servo $4595I SUPER-MICRO SYSTEM PRICES 72MHZ 12 OH 2 Servos 237 OZ$24495 13 CH 3 Servos 281 OZ$29145 I 4 OH 4 Servos 325 OZ33895 5 OH 4 Servos 326 OZI34995 TX Dual Rates $1500Mixer $3995 ISystem S & H $975___I G-MARKO3RIC&061 RIG PLUS I SPARES ARE NOW IN STOcIK ___I ICATALOG $100 USA $300 Foreign Add Equipment Sales Tax Calif Prices Cash Cards 5% More ViSAII I20% Deposit-COD steep straight climb cannot achieved model will inevitably roll off less steep spiraling climb less altitude achieved larger vertical tail worse will 3 The vertical tail must small enough front fin effect spinning tractor propeller will just slightly overcome produce slight directional instabil ity allowing very steep straight-up climb pusher models cannot climb straight up front finwhich retracts glide 4 The acceptable vertical tail size found field successively cutting away until steep straight climb can achieved Too much cutting away will cause Dutch roll troubleseven violent roll crash right after launching starting guide size just barely large enough produce no hint Dutch roll glide ie numerous hand-launched glide tests FF Scale models often have too large vertical tail small dihedral Free ing hinging rudder portion float freely 450 both directions often ade quate prevent spiral instability deviation scale size Further helpful discussions about sub ject modeler book Mak ing Scale Model Airplanes Fly Air craft Data Box 763576 Dallas TX 75224 William F McCombs Dallas TX Continued page 210 12 Model Aviation TAKE THE HOBBY SHOP HOME WITH YOUE THE 14th ANNUAL RADIO CONTROL BUYERS GUIDE reference guide oil R/C hobbies Browse through guide find items need youll know just what ask favorite hobby shop RADIO CONTROL BUYERS GUIDE lets turn wish list shopping list knowing whats available con plan new projects improve existing projects Price formation also helps odd up just whot plans will cost Look RADIO CONTROL BUYERS GUIDE local hobby shop call 800-446-5489 weekdays 830 500 CST order RADIO CONTROL BUYERS GUIDE supports Academy Model Aeronautics AMA donating $100 copy guide purchase authorize donation AMA mall hobby shop reciept coupon below Kalmbach Order direct using coupon calling 800-446-5489 OSSOO@ O@@@OSSO@@ ... 6 OOO@@OO 66666 Ta order send Dept 0196 RADIO CONTROL BUYERS GUIDE PO Box 1612 WaukeshaWI 53187-1612 VESI Id like order _____ RADIO CONTROL BUYERS GUIDES #12092 $ ______ ent enclosed ge account Name__________________________________________________ Street______________________________________________________[v33][b22021205153010410]] Oily State Zip Country Charge ercard ican Express mm $15 Card#________________________ Exp Date_____________ Signature Include postage handling US $150 canadian foreign add 15% minimum S3 Make payment US funds Wisconsin residents add 5% sales fax Price subject changeDept 0196 S CANNON Phone 18051581-5081 RIO SYSTEMS 2828 cochran st Soite 281 Sim Vailey CA 93065I D/~YSTEMS MADE IN READY TO FLY 1/8 SCALE TOP GUN BULLDOG 149 No except will know ARF Info Orders 914-429-3484 800-628-3484 CAMBRIDGE MODEL AIRCRAFT PO Box 26 Norwood N J 07648 Introducing SABER Wing Span 121 Airfoil SD7037 Obechi Sheeting Completed Fiberglass Fuselage Send 2 stamps copy Catalog showing complete line Multichannel Gliders DODGSON DESIGNS -21230 Damson Road Bothell WA 98021 Phone 206-776-8067 ub off speed mass can also de fensive tool flier takes off oppo nents whole streamer early flight normally has scramble remaining time trying avoid giving away bunch cuts situation flier has Soviet-style model has option just whacking other guys plane flier already 100 points up cut other guy probably will lose lots time ground other guy sends up spare whack too SUPER SHARK TORPEDO brutal seemingly unsports manlike way fly Combat thats way its done insist flying fragile models theyll make confetti out British star Mike Whillance has picked up nickname Whacker Whil lance Soviet-style models use Second-placer Mervyn Jones used So viet kits hed acquired Leningrad Mervyn used rear-intake Nelson engines compromise leading edge SCORE DnmcT HIT WITH ThE NEW SUPER SHARK TORPEDO AUTOMAI1CMOIOR START AT LAUNCH AND SHUT OFF AT TARGET NICAD-540 MOTOR POWER 25 MPH 300 YAJtD LANGE PVC PIPE BODY HR BUILD MOUNT AND LAUNCH SYSTEM INCLD GREAT ON FLOAT PLANES Put real action R/G get thrill scaring direct hit sending $695 torpedo plan set COMBAT R/G 10241 Ridgewood El Paso TX 79925 GLOW DESIGNED PLUG Puts mc e St ng n engine FOR LONGER HIGHER5 Get starts GloBee Unique flat-wound spiral coil element anc high temperature glass-to-metal seal add up faster ignition increased RPM GloBee plugs specified original engine manufacturers purchased over over again Pylon control line racers find GloBee plugs best GloBee plugs designed fit popular engines used today unavailable locally write call Twinn-K collect pricing & delivery information & FREE Catalog MAKE THE GLOBEE / INDY CONNECTION Twinn-K Inc 10296 W Washington St Indianapolis IN 46231 Telephone 317-839-6579FAX 317-839-8928 210 Model Aviation spar order inset engine enough model balance correctly other models good enough win So viet design appropriate tactics has percentages its side US think winning World Championships simply matter beat ing Soviets Actually out standing fliers other countries Hen ning Forbech Denmark teammate Bjarne Schou Hakan Ostman Sweden Roland Forstner Germany fa miliar names 1984 performances World Champs US theyre excellent pilots British team ex tremely strong time Soviets seem have depth talent other country Americans surely dont take backseat Europeans game seems played little differently over Elimination matches seemed drag af ter Americans lost eventual win ner Viacheslav Belaiev probably deservet anyone else field Tht British took second individually thc second time row Mervyn Jones whc took second-place honors worsi luck match Belaievwhich Mer vyn would have won just flying arounc getting air time after exchange oi cuts kills things two mod els crash own because contro horn came loose airborne Predictions next time chance il crap shoot like Control Line Combat responding advertisers mention read about Model Aviation Letters Editor Continued page 12 Original Esquire Enclosed please find photo Es Continued page 21 New Cutting Edge Open Class Soariuf Performance RC Sailplane spans 76 uses twist-wing control Requires RC system elevon mixing function four servos No 670 Limitation $675 CL Profile intermediate Stunt trainer 29140 power spans 51 No 671 Cessna Cardinal $575 FF Reminder Scale sport flier power spans 39 No 672 Krackerjac $1375 RC Updated version pioneer RC sport plane spans 74 Uses 40160 two-stroke 40/60 four-stroke engines Two plan sheets No 193StIletto CL Slum model McDonald winoer 1976 1980 1982 FAt World Clrampo$ 375 No 262Crashmaster CL Crash-proof traloer two oizes19130 aod 35140 power$ 125 No 3101930 Fleet BIplane BC Sport Scale 35/40 4-clranoel Wngspan 56 in. scale Two oheelsS 625 No 314Drake II BC Ken Willards flying boat tar 3-channel 15-power Fly land removable gear$ 375 No 326Taylor Cub BC Don SrolIs Schoolyard-Scale 0490 2-3 channel Spans 50 m$ 350 No 332Zephyr BC Smaf 2-channel glider hand-launch tow Ihernial slope soaringS 200 No 386 Laser 200 BC Sport Scale replica chaorpionslrip Aerobalic filer Uses 40 power 4-5 chasnel Two sheets $ 1075 oNo 4471/2A MIle AmerIca BC Old-Toner WA Texaco model tar 049 glow 2-channels$650 oNo 4604-40 BC Shoulder-wing sport filer tar 4-cycle 40-size engine 4 channels$650 0 NNo 465Blue Max II BC Fan-fly sportoter 40-san engines spans 52 Lightweight sirectare$700 533Cessna C-37 BC Schoolyard Scale fareoun 30s plane br 049110 power 2-dr spans 42 inS500 No939SImIlar Stow-MotIon 15 BC Takos flying wing tar 15 engines spans 600 noes 3-dr BC5350 No 569Elecerosorewie BC Electric aembalic plane spoon 44 ones 06 motorS550 No 57215-260 BC Sport Scale Aerolliallc plane tar 4-stroke 60/65 power spons 0010S1100 CNo 576Serandlpltyl FF Indoor EZO record-holder spans 1771 in$325 Fda 578Scinwelzer 1-269 BC Onarler-scale Saliplane spans 125 Two plan sheetsS1475 No 581Gee Bee Model Y BC Golden Age Racer spans 7210 scale tar 60 power Three plan sheets$1175 0 0 No 566Snapdragon BC Fen-fly/sporlster tar 25130 engines spans 45 inS600 0 86 sh BC Slope-Soadeg Sailplane spans 41 ones 2 BC channels No593Taylorcrsft BC Sport Scale lighlplane haNds Olandard 2-placar clipped-anna ror show stonIer Spans ether 70 fl 0or 58A 30/40 two-strobe 40/48 tour-stroke engoro Two plan shoots docoroentationS1000 58Coronet 150 BC-Assist Old-Timor enlarged 155k spans 72 asas 40-size 4-stroke/30-size 2-strokeS850 tO No 603Sparrow Hawk P30 FE Corepetition rehher-pawer plane won 87 Hats Spans 300S225 E 0No 607curelss Seagull BC Giant Scale biplane spans 90 eses Onadra/Zeeoah power Three plan sheets no doc$2490 No 609Taperwlng BC WA Pylon Racer spano 29 Plan plen parts leasplato sheel5 600 inNo 610Protobype BC Spent biplane spans 48 axes 45/2-cycle 8014-cycle powerS 650 No 619KeIth RIder R4 FF Scale Golden Age racer rebber power spans 18 inS 300 oENo 620GImlet 40 BC SporI/Paltero plane spans 6010 45150 engine 2 sheets$ 1100 zmNo 623Henderson Longster BC Oearlor-scale 1933 Saver spans 9050 tar 4-stroke 40/48 engine 3 plan shl no dec$ 1650 CiNo624Keleher Lavk BC Onarler-scale howehait spans 60 far 60/90 4-stroke power 2 plan sheets no decS 1100 050No626Sweepee BC Spart/Paltore caoards toneard-swept wing spans 6410. noes 40 power 2 plan sheetsS 1300 No628Prlnne Cut BC SporI/Aerobatic plane spoon 00 in. ones Onadro 35/40-slan power Two plan sheets$1300 oNo 930OrigInal Fly Baby BC Old-Tinier spans 72 oses 19125 2-cycle 404-cycle power 2 plan sheets$ 1150 No 635The Gsmbler FE Indoor Bostonian robber-power cabin plane spoon 15% inS 2 00 CNo 636Keytwo BC Tn-geared law-wing sportster fnr 20/25 power spans 44 inS 575 -o 0 No936 OwlRacerCLAScaleBacertorO4Opowerspans2Oin$ 225 C tONo 629 Skyvolt BC Tn-geared Electric anrohalic spartster tsr 98115 power spans 50' inS fiSt N No 641 LII Ole RelIable BC Old-lireur sport filer spans 52 engines5 575 tOn No 644 Bellanca columbIa BC Schoolyard Scale tar 2 BC channels engow Wingspan 48 inS 575 esNo 646 WInter Hawk FF Bebber-power Conpa ditisor coropetitino plane spans 47 in$ 375 E b No 646 Curtlas OC-2 FE SastIs Goldoor Gas Flying Scale biplane ones electoc power spans 24 HiLine Mini-it reolnr $ 325 0No 693 47/66 RC SpecIal BC Aerehatic sport plane 40 power spans 61n 3 plan sheets5 1075 No 651 consortIum BC Hand-bosch HI-Start Glider spans 60 in. S 650 52 Der Fledermaun BC Low-wing sport plane ton 20125 power spans 55 in5 675 C 0No 664 Tannecat BC Tnainer/sportster styled like F14 spans 68 40161 power Four plan sheetsS 1525 0No 655 Aseroatar FE AMA Class AS Gas plane spans 67 noes 325/350cc powerS t00 No 657 Super SquIre BC Trainer ton 35/40 2-stroke 53 4-stroke power spans 56 in 5 750 CNo 656 Shuolkeon Streak CL Trainer uses 2-line Monoline control spans 17 power$ 225 59 BoomoxFFWabefialdBabbercorepettiinnplanenpans54inS 400 No 660 Volkagslane BC Electric-powered sportoler 06 orator spans 50 2 plan shts S 925 No 581 Embmy-OmstIc FF Erebrys Endaronco robber-power plane spans 20 in$ 200 62 BookIes CL Scale antique canard pasher biplane spans 42 2 plan streetsS 1100 No583 Pea Patch BC Sporlsler spans 60 in. noan 40/50 4-stroke power 2 plan sheetsS 900 No 664 Stubs Stunt CL WA StonIer nemiscale spans 37 in 5 500 o No 665 ConscIentIous Objector FE Muidhill flubber corepetition plans spans 50 tat5 575 3 hNo 666 BlItz BC Sportster spans 48 ones hot 28/32 power 2 plan sheelsS 1075 0 iSNo 667 AT6CLSeraincalopastileSlunttrtor35/4Opowtrspans47inS 575 0 No 666 Slow Worm 432 FF AMA Class corepetitian plano tar 00/15 power spans 54 RatS 500 0005 tO cle numbers plans wish order best handling please include re 00 quests payment some other service plans order 193262310314326332386447 460465533539569572576578 CO -581586588593598603607609 0610619620623624626628630 0635636638639641644646648 650651652654655657658659 C0660661662663664665666667 668669670671672 __ Plan price includes first class postage US delivery Which Air Mai over 300 miles orders non-US address 16858 add $250 Air Mail osta e handlin tsr Ian e Check money order payable US funds drawn US bank Model Aviation AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 Weeks delivery ase print carefullyEnclosed $ E ___________________________________________ AMA No _______________ STREET en 0 CITY LSTZIPj quire airplane referred July 1990 issue page 25 has distinctive Esquire triangular block 05 15 Max engine model excellent condition mi nor bruises bought Esquire already built very old whole model except wing has paint finish Brad Greenwood Atchison KS Cloud Seeding Models After four years drought losing full-grown trees native shrubbery canyon wells dry moisture-laden clouds bring thunder lightningbut no rain readers have ideas RC model could used small cloud-seeding operation such thing possible modelers provide service will much demand parched Southern California other drought-stricken areas country Mrs Ivan C Kelley Ruth E Kelleybut Ivans modeler Canyon Country CA Propeller Drill Jigs Self aligns existIng prop hole webra Bully a-Dolmar Zenos um II SunCraft 1617 LoaTnrosnoaAlbuq NM 87102 505-842-9646 TOURNAMENT CHAMPIONS Finals Las Vegas NV Nov 9-11 Special Discounted Airfare call rena Gorny CONTEMPORARY TRAVEL 000-336-0033 Outside NYS 516-360-3663 NYS rum woos U L ENTERPRISL5 212 Model Aviation $1696/ 65