Bill Winter 0 Plane Talk THEY SAY can tell man books tell fellows largely kinds models build fly Before column sets sail three-yearjourney search Great White Whale owe landmark Resisting impulse explore Mice-in-Wonderland science preparing competition Scale documentation cal culated science thought-controlling judges show em everything show em nuttin known documentation done its own sake can become book book about Albatrossthe double S tells about Scale Albatros 5 WW German fighter Things such grow like ivy Lets begin Tom McCoy picture Lanzos RC-l radio job 1934 appeared column three months ago Aware McCoy old buddy Chet Lanzo asked both photos background resulted threeview Chets exciting photos presented two months back During 1980 bull session Chet men tioned drawing plans forgotten wun derkind remark went over Toms head until saw Chet fly pretty bird SAM Champs Westover AFB 1982 supposes knew what looking subsequent meet Cleveland Tom realized earliest-ever RC jobs Chet gave him plans romance RC-l began happened Toms photos RC-l arrived docu mentation book Albatross did color shots stable superbly-built OldTimers Antiques exquisite Tom demon competitior well 1984 alone compressed-air King Burd took first SAM Champs RC-1 won another Michigan State Champs DRCC OldTimer still another RC Old-Timer Detroit Expo second OldTimer Toledo Lanzo Bomber OldTimer won first MRCA Show second Detroit RC contest third New York State Championships Building 38 years Tom joined AMA Detroit Balsa Bugs 12 1952 Junior AMA Champion winning Cooper Brothers Trophy Indoor Rubber 19 flew first RC Berkeley Cavalier Citizen ship 465 equipment Having published first license free RC plans ever MAN 40s using pre-production sample radio can attest 19-yearLeft Tom McCoy Lanzo Bomber RC first 1983 Toledo Show Tom favors natural yellow silk variations trademark color schemes consisting blue black trim often white striping set things off Above Compressed air King Burd atthe 1982 MichIgan State Meet boxy Robin-like modeiwon boththeSAM Champsand MiniChamps Ribs narrowtips wing tail holed forlightness Winterwonders abouta 1 0-1 5 gasfor oran electric motorforhigh-time duration over 40 wins golden oldies mostly firsts seconds Tom McCoys virtual museum pieces show little no sign strenuous competitions show seven examples selected Toms scrapbook really much like Scale documentation book Leading off Albatross design George Reich really turns Winter 80-In semi-cabin design competitive pylon ships Toms model first Dennymite engine now has ignition Super Cyclone piece wood carefully selected holes cut ribs forextra lightness plus lightweight silk covering clear dope finish keeps wing loading 8 oz per sq ft FF 10 RCI Has thick high-lift wing high thrust line shock gearprecisely like original old guy like Tom managed 465 project survivor Alamo Tom founder Detroit RC Club 29 years ago origi nators Toledo RC Exposition also versatile enough have won second Michigan State Meet Lacy 10 M Peanut During 1980s Torns oldies have taken 39 high places Toms documentation time-trip book Tie string around finger. have luck Irish seeing legendary fliers make great flights Lew Mahieu Dooling 29 tiny Zeek Joe Konefes 44-min Bombshell Chicago Roy Nelder launching Moffett winner Copland Jim Cahill Wakefield-winning Clodhopper Wris ton Dague Carl Goldberg diamond Zipper Interceptor Sailplane Valkyrie Cumulus Gordon Light Lanzos Bomber RCs big Puss Moth flew like Mulvihill Kovel KG Bassett talring Eastern States So-Long Elgin Playboy timed Kordas mighty Wakefield flight Aldrich Nobler Yates Madman Palmer often Saftig Zilch 445-pm shoot-outs Speed Walker Goods Kasmirski Orion Bon ner Smog Hog ff1 sat down sky fell Weird So watched among others George Reich Albatross left lifetime impression least 30 years no seemed notice Ive looked plans times published designed 1940 Air Trails Reich two-time Wakefield team mem ber once winning fabled cup Dick Kordas brother-in-law another Cleveland band immortals still builds flies oldies SAM stuff Albatross discovered bang Pylon Free Flight models ruled iron hand good 20 yearsthey alone could handle high power witness modern Satellite Yet like Konefes Reich went cabin design George secret side profile gave high wing like pylon high thrust line made fly like postwar 1950-1960 high-thrust pylons could climb safely dead ahead bored holes sky combi nation Albatross ideal now super-stable loafing around RC assist Old-Timer bag Oddly has lifting-type tail CG one-third wing chord supposes Astro cobalt geared 40 16 cells would get high enough 12 min Electric McCoys book full surprises sort modeling family bible Only notebook gee er featuring Alba tross Xerox some art directors work Id guess alone makes unique page encased protective plastic begins simply pageeverything throughout neatly typedcalled Old-Timer RC Mod el tabulated vital specs flip side against black background old magazine clipped photo guys room 1939 Nats Reich Elgin Korda McCoy others Another page describes original Alabatross along color photo Reich 1982 Lanzo Bomber Thats followed entire construction feature 1941 Air Trails two pages entitled Model Virtually page includes some old clipping involved old-timers relevant models page about engine quote tells work good read Super Cyclone 60 gift old friend Harvey Thomasian Worster MA Harvey old-time engine man particularly famous customtuned K&B engines during late 1 950s early 1 960s Harvey has large collec tion old ignition engines Cy clone certainly beautiful Although Left Toms model very popularTaibi Powerhouse placed second 1983 MIchigan State Old-TimerContest models shown have won other places Right First place Toledo 1982 went Toms rendition Maurice Schoenbruns Gladiator Like other Schoenbruns classics distinguished ample area deep belly high thrust line long tall moment Another cabin model Left Another Lanzo design Record Breaker isa functional parasol nice lines shot Danny Sheelds Americas unofficial Old-Timer goodwill ambassador British events Right Berkeleys Buccaneeretili built great numbers Heres Tom rendition 19308 classic Thanks early RC efforts Joe Raspante design also authentic RC Old-Timer Joeswasa monstrous size May1986 23 Stinson SR-S Megow followed about cowl bumps Winter says did bigger 1934-35 Flying Aces built sizes up 45-in span Bell relates bittrickyto adjust poor glide after power ran out glide improved after wear tear patches previously-siickwing Winter launching Rearwin Speedster indoor Scale meet Bill Bell says Speedster notes cheated Rubber first new models 1980 Once kitted Peerless 24-in-span design Scale designs generous tail area insomewhat beefed up still good flier indoors out Bell photos Tom Schmitt creases Made em fly much better says Left Pleet Trainer another Peerless two profile pilots impressive radial engine nose plug being readied winding stooge second Bell project required dihedral top wing good flight fuil-scale ship nonewhich would fine RC Right Caimly Bell gets off perfect two-hand launch dainty bipe Model has flying wires although cant seen plc its looks may fool new engine well broken-in pleasantly surprised find will turn 8500 rpm 14-4 Tis small world Harvey buddy Hal deBolts roughly 30 years ago published Live Wire-type plane Harvey trike gear Just lately during -scale Vagabond project supplied photos full-scale red-and-white Vag Just today same photos much other documentation sent HA Thomas similar project friend Hartsfield Little Rock Thomas McCoys book turns Propeller Tom says flatly present-day props unsuitable old ignition engines simi larly can tell traditional props best four-stroke engines no 3-in pitches FF useful prop case TF 11-4 has wrong blade shape lower ignition rpms Tom tells us may have heard low-wing Spartan did know also cabin version Bells third project once Comet kit Bill says its often mistaken fora Stinson Note ring cowl circa 1930 struts Neat two-hand launch Bill uses smooth fluid 24 Model Aviation Left Flying through skies Ninjing China Joe Tschirgis Short Stik tailless shortened Giant Stik currently powered 2500cc Supertigre Waibo pumpercarb No trick airfoil elevons widened Does nice wingovers buttall makes crosswind taxiing pain Text detalis Tachirgis expianation symmetrical wing standard zero-zero conventional piane may appearto fly level trim kind Refer diagram below follow discussion Right Can beileve Its Joe Tschirgl Stik its derived Bill Evans tailless technoiogy Older CL Combat fliers may remember Nobody design almost identical approach book has stuff reworking props Lost Ark data coming 1940 Air Age Annual Air Age corporate name MANs publisherbut doubt MAN annual 1940 whereas Air Trails did Thomas article certainly needs republishing Replete wonderful draw ings about methods obtaining truepitch prop includes blade top side profiles 14-8 probably would make Enya 60 four-stroke run like blue blazes Suffice say McCoy constantly pressured great props various hands have impres sive win record INVERTED TRIM PITCHING MOMENT ABLE REGION ANGLE OF ATrACK 4- FROM ZERO LIFT UPRIGHT TRIM POINT s new modeis foiiowed Taylor Cub Peerless Cessna C34 neither shown 24-in Taylor best lot though beefed up Beli states almost lost number times Above Aftera Fokker 0-Vil Scientific made tight turns fine glide good fiying indoors Bill built very beautifui Douglas Vi 0-43 Comet shown two views iost powerfui thermai 1984 now has repiacementversion forflying indoors Below Nicelydetailed resplendent Navy colors Beils F4B-4 American Modeicraft big use indoors waiting forgood outdoorweather Pianetakes six strands Ia-in rubber one-third Toms book states following section presen tation personal about mod els Thats beyond reporting talents Color pictures galore red blue yellow win ribbons Reports various major SAM meets can select some photos Toms models run descriptive captions ways fly alas horde newcomers may never discover before run course Bud Davisson gifted pilot word-maker does the Cockpit series MAN talked Command Air cover January 1986 MAN put extremely well urged Giant Scalers Continued page 26 May198625 Winning Ideas FOURMOST RETRACTABLE iTOWHOOKRELEASE Price 8690 V y4 F Simplest reliable device available After line released hook retracts body unit leaving SMOOTH surface bottom aircraft No special attachments required N eight Y2 oz OTHER FOURMOST PRODUCTS 0491051 AIRFLO ENGINE MOUNT 40 AIRFLO ENGINE MOUNT IDEAL FOR GUICKY 500 PRICE $630 REDUCES DRAG VIBRATION FREE PRICE $300 Fuel Fitting Sets Fuel Shut Off Fuel Manifold Gaplese Hinges Gapless Hinge Slotter Strut Fairings Codcpit Coaming nd SASE Complete Information 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 NEW GLASS FILLED MOTOR MOUNTS 0405 1011 1519 2025 3035 4045 40451 5050 5070 195 225 235 245 265 275 300 325 325 OEM BULK INQUIRES INVITED Featuring LONG GLASS FILLED NYLON FOR STRENGTH AND STABILITY Alignment Lines Mounting Interchangeable Kraft Flat bottom nose gear SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 AREA CODE 513 738-1576 put Technopower radial stand out bipe dont let see giving airplane Warp 9 performance said Let float along Let poke slowly can retrieve running under grabbing Let change pace Bud may have gotten bit carried away indelible experi ence nearly 50 years ago 30-in rubber-powered SE-S Joe Ott design Bud added Youll guy field can zig should have zagged push should have pulled will have airplane gives him plenty time correct mistakes Itll model because does 1/1 scale Two worlds Fly power Fly wing both prithee Bud could speaking old-timers things fly wing goes far beyond old-timers Years ago people tired the wall-to-wall Pattern-type thing escaped RC Sailplanes must have noticed years heavy advertising popularity Flying wing antique fetish What airplane during its aerobatic routine wonderfully fulfilling letting air plane itself almost sheer beauty flight equally fulfilling gotta have power Sailplane has except gravity Zero displacement maybe should keep scrapbooks rainy days doesnt rain gentleman Dihedral Ave address omen never saw Bill Bell come-backer So thousands born-again readers special case course chose specialized beautiful Tom McCoys brilliant pursuit Old-Timers ap preciate Rubber Scaleas us whether fly themBills efforts merit resounding well done As kid during Thirties Bill built Scale models 10- 25- 50-cent kits Megow Comet etc did vast multitude 1980 interest stick-and-tissue birds rekindled discovery Golden Age Reproductions new kit models put out Joe Fitz gibbons Tom Schmitt takes memo rable pictures wanders provides delightful prints make report possible Suppose group few Bill Bells Rubber Scale ships captions does other things too bumped him once flying dream Stearman biplane Flyline Models kit engine lo behold other models old designs case AMA Museum highlights some misdeeds written Bill finishing Albatros D-5 garish streamlined fighting machines WW D-5 some reason makes stupendous flier view pictures way Scale guys will dreaming manner RC things including Giant Continued page 28 26 Model Aviation FCYANOACRYLATE List Sale Savings 1 oz Fast Cure 3-5 Sec 495 $2 500/0 Off 2 oz Fast Cure 3-5 Sec895$396560/0 Off 1 oz Gap-Filling 5 Sec495 $2 50% Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave San Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 408 251-0789 Out StateINFO 408 251-0787 California Hours Mon-Wed Fri & Sat 930-530 Thur 930-900 1200-500 Pronto Retail $3995 Super Pronto Retail $4995 HIGH QUALITY 48 SPAN KIT FOR 09 TO 25 ENGINES FEATURES low wing design high wing stability excellent inverted performance Gentle novice Expert versatile performance 4-6 hour rapid-fire assembly beginner Precision machine-cut SIG balsa plywood spruce Rolled full size plans showing complete wing Step-by-step instructions easy assembly Formed main landing gear Exceptional small field performance May flown ito 3 channels Tested recommended approved b RIO Modeler Magazine Model aviation July 84 Virginia residents add 40/o sales tax Playmate ready now 5 15 pan 50 2 4 cycle TIDEWATER HOBBY ENTERPRISES Route 1 Box 2410 Lanexa Virginia 23089 Lftj9i Phone 804 966-5092 Scale course Rubber Scale guys will go ga-ga little traveling music please . Nanjing China Warning rock slides ahead Set stage cast characters bit background like strange airplanes anybodys impossible novel ties Since violate no aerodynamic law notions airplanes must fly has narrowly rigid Among us little knowledge can dangerous thing Maybe its good challenge traditions live Virginia Im Missouri am open-minded least dozen things including cockeyed dihedral explanations Im far out flexible Ive never seen genuine proof synimetrical-airfoiled wing zero-zero setup cant maintain level flight being trimmed ele vated up down does see strange things however elemental truth am necessarily stupid Okay engineers know some lift must developed situations agree shakily disagree Now time-out introduce Joe Tschir gi writes hotel room opposite side globe Joe respected old-timer fa mous strange airplanes ortho dox Scale models beautiful fliers apt strange Some may re member things like German WW Brandenberg biplane flying boats really strange Scale bird its prop located aft wings conventional fuselage Play mechanics once member own club NVRC prior coming Virginia years ago involved pro fessionally drones stuff knows subject description out-of-control RC model reed Rookie December issue caught eye Joe begins some years Ive trying finish series articles stability control mod els Its natural endeavor since before retiring 18 months ago fooled people believing knew something about sub ject 35 years Anyway question good Pattern models need little no down trim level inverted flight has always bothered Since wife decided masquerade English teachers Nanjing Ive time think about problem believe now have answer Authors Note excellent technical discussions received column one-on-one basis because references mysterious things ob served fun theme best served avoiding esoteric deep stuff example pile brilliant papers pro con relating air ocean debate fills series large manila envelopes Some letters exceed length column making exception Joe Tschirgi hoped reader will drop out Continued page 139 28 Model Aviation DAVE ROBELENS PRONTO AAJfl IIPPR PRAAITA per oreer FAST SERVICE COD ADD $190 Letters Editor Continued page 12 Thus weve filed criminal complaint charges against guy shooting down airplanes flying through sky Its lengthy battle prosecute sin come down home stretch hope will win Now before leave office have recommendation state Lets finish up court case forget about hate Weve lived through three years prob lems some us its rough Lets get sport model avi ation weve suffered long enough Mike Barklow Appleton WI accompanying letter Mike said foregoing poem written 1983 stepping down president Valley Aero Modelers clubs newsletter notpri nted due suit progress Despite best efforts club lost flying field doldrums briefperiod maintaining positive attitude group able establish new flying site rebuild itself now bigger better ever very gratying to organization Mike notes Safety/Preston Continued page 20 about accident members havent heard heres story heard few weeks ago member friend out flying weather fairly cold member standing wing tip friends plane friend attempting start using standard electric starter plastic engagement cone Somehow engine started friend surprised starter slipped off spinner hit ground trigger still depressed strn spin ning plastic cone exploded sending fragments directions friend got small piece through part ear sliver hit member corner eye caine out again doctor says 50% chance will lose eye may have have cornea transplant incident tragic enough itself stop think what could have happened occurred field person hurt innocent bystander kid Weve got keep spectators children out pit area Friends not. comment incident repeat something Ive said several times previously consider pair safety glass es starting model working shop Have safe month John Preston 12235 Tildenwood Dr Rockville MD 20852 Plane Talk/Winter Continued page 28 things become bit sticky Some will understand presentation its entirety am fortunates can interpret comments virtue simple diagram no math Will prescription fly Ponder photo giant tailless Ugly Stik involves no trick airfoils Follow Joe end youll find other comments play Let assume perfectly symmetric aircraft argument Tschirgi warms up has symmetric airfoils both wing tail thrust line wing tail CG centerline has zero-zero incidence setup also assume fore-and-aft CG position such model trim level flight Since model perfectly symmetric pitch plane its obvious model will also fly straight level verted assumptions solu tion clear leaves another problem can such model trim angle attack except zero tricky part model symmetric angle attack airflow over Behind wing generating lift have downwash evidence vorticity shed wing Its strength centerline strong function aspect ratio normal model configurations downwash small function angle attack concentrated directly down stream model changes angle attack tail sweeps through region Generally results pitching moment curves nonlinear have reduced static stability near zero lift sym metric model assumed stabil izer center downwash field However CG far enough aft static stability can zero unstable region exhibiting positive static margins outside unstable point maximum downwash effect model will have two trim points symmetric model postulated would equal opposite sign lift coefficients best visualized referring illustration fact dynamic pressure re duced wings wake Joe goes also contributes non-linearity course reversal cannot exist unless static stability quite small tail out wakeie CG well aft brings up another interesting point models easy fly some cases easiest have little static Continued page 142 May1986 139 n ou sy SEE- HFE THE BOTTLE OF ZRPJET LEPKED FiND sNIcKE YOU TRIED TO SCRPTCH YOUR GIGGLEEP / 0 ZIin ZSOL 92 span 19-21 lbs $20995 Piper PA-17 Vagabond 84 span 10 lbs $15995 Super P11 92 span 19-21 lbs $18995 Chipahip 90 80 span 1/5 scale $12995 TalIwbeel Assemblies 3-8 lbs$1095 4-9 lbs$1295 10-l8lbs$1495 lOibsaup$1595 Manufacturers Softglass Fast Tape Fast Threads 1/4 Scale Pilots Plans construction models three large sheets eli parts shown full scale Weighs down construction bales plywood Models available F 84-F Thunderetreak Sabre F 100 Super Saber Fighting Falcon Eagle Mirage 2000 21 Fishbed i Blackbird F 104 Scarf ighter Fit types ducted fan units wheel 5 dia 40 80 engines Available also motor ducted fan unit sod canopy Price plan 5000 US dollars includes shipment air mail rolled tube Write free literature InformatIon G Bertella Via Matteotti 248 Gardone VT 25063 Brescia Italy 1981 World Soaring Champ DWIGHT HOLLEY FEATURES Sailplanes lous Electric Planes AS1IOFLIOHT e UNGE e 11113 MOICIS IN STOCK SANYO SANYO SANYOBattery Special NSOOAR Weigh 36 Grams Cut Oficells NEW Lower Price Red Jacket Cut Off cells N1200SCR Weigh 52 Grams $340 1200MAH Now 2 New Super Cells Sanyo N-900SC SCR Cut Off cells $375 Both weigh 39 Grams 3/4 length 1200s same dia N900SC will deliver least 950 MAH N900 SCR will deliver great amperage quickly oELECTRIC MODEL SAILPLANE SPECIALISTSHOLLEYS SILENT FLIGHT FEATURING ONLY STATE OF THE ART ITEMS 03 748-0083 LUCALL OR WRITE FOR FREE DESCRIPTIVE FLYER 151 CHESTNUT RIDGE RD BETHEL CT 06501 U MS SPEED CONTROLLERS e GRAUPNERe ASTROFLIGHT KELLER UNGER Plane Talk/Winter Continued page 139 stabilityat Static margins percent chord would dangerous full-scale aircraft Conventional models have dynam ic stability far excess full-scale aircraft because very low density fact believe modelsparticularly Pat tern RC duration power modelsare dead-beat fundamental pitch modes allows marginally-stable stat ically RC model easily flown Fur ther low static stability high dynamic stability required model going groove same qualities needed Free Flight models handle high powerbut another long story As might have gathered Im con vinced dynamic stability damping important primary factor suc cessful model design primary factor both pitch stability control both RC FF Power also major requirement spiral stability Free Flight models discussion has simplified assuming symmetric model same two-trim-point pitching moment curve possible asym metric model including cambered wing fact inclusion cambered wing may make easier achieve However explanation much involved since cambered airfoils pitching moment necessary ingredient two-static-trim-point mo ment curve certainly flyableI believe have done itI doubt total cause unusual incident Tschirgi continues believe Janomo lie would noticed corrected example bit down elevation fed level flight model would shift negative trim point stay trimmed elevator neu tralized CG assumed moment curve shifted bit forward un stable region would become flat very slightly stable double trim point would vanish very slight amount down elevator trim would make second trim point reappear believe typical condition RC model 0 0 0 0 Ce 0 2 0 Ce Ce m -l 0 2 Cit C F F grooves well remember reed servos fairly wide deadband neutral because use slide switch contacts Hence think model grooved well servo stopped downside deadband Au Eureka finally know Only once before has anyone offered respectful comment observation zero-zero symmetrical wing sometimes gives impression model can remain straight level control input observation flies face truth wing must generate lift hold such attitude Years ago asked Joe Wagner thought such setup could maintain straight level possible Joe replied sym metrical wing changing its angie attack between positive negative over small range trim its doing visible eye wonder now about Wagners ooncept invisible chang ing trim exists necessarily has two limitspositive negative note Tschirgis diagram need understand two trim points calls out shown intersections line labeled Angle Attack Zero Lift say wonder strange out-of-control flight Rookie occurred 1962 Control lost plane inverted overhead low altitude up-trim rolled inverted obviously no downtrim oould inputted inverted since control gone plane circled entire area maintaining constant altitude eventually arriving low overhead original headingat point control regained quick landing plane symmetrical Yo-/3 semi-symmetrical airfoil some angu lar difference some dihedral high thrust line design factors oom bined especially high thrust line low thrust line inverted help maintain impossible level flight probably could servo stopped side neutral Tschirgi said would impart unknowing slight down elevator trim dont forget Tschirgis analysis shows truly142 Model Aviation Ohio 11376 Ridgeway Rd Kensington OH 44427 216223-1950 1 Full Size Plans Ducied Fans 1 J C Trainers_ Wing 60 Size40 SemhSyme Size20 Size See local dealer call us location dealer nearest symmetrical model also could maintain straight level flight under same conditions eye old Rookie generating liftwhen fact lift present law states due strange confluence conditions aerodynamics beyond ken modelers Highly interesting fact modffied Rookie comes close will duplicate inverted phenomenon much heavier balanced one-third chord whereas original lighter CG 40% chord will have noted Joe Tschirgis references balance points balance 40% what new Rcokie surprises people fly its ability go inverted slightest urging remain inverted ease long periods steering such inverted Figure 8s additionally implies non-symmetrical craft kind disposition surfaces thrust line etc could fine-tuned maximize desired end product series de velopment Bats belfry know whats So whats Purple Plan mail brings mention some guys Purple Plan repairs finishing dusty frameworks hanging think AMA should have Purple Plan badge could wear proudlyor pin rear buddy cant get acttogether now alas probably 50% remember did see column year ago Purple Plan important tote keeps up well have rerun item Ive now applied flying keep saying Wait till next year next year field muddy early spring winds blow gets tco hot gets windy again too cold Once snow sleet fog no excuses October sometimes late September November later golden days Like Ba hamas wind III can get two perfect October days makes up year worthwhile make another plane two over months via Purple Plan flying career goes FLYS GREAT IDEAL BEGINNERS AIRPLANE THAT BUILDS IN HALF THE TIME Jig built balsa fuselage 90% Built wing Excellent instructions first time builder Full size plans Decal forms windshield JOHNNIE CASBURN MANUFACTURING CO 5115-SE E Rosedale Fort Worth TX 76112 Day 817/451-7537 t 817/572-1452 always another golden October modified Rookie Enya fourstroke 60 sat unpainted nearly year flies beautifully thrust torque its 14-6 8300-8500 awesome especi ally pulling through tight slowed up close-in aerobatics wont fly helper reminds crewing Giant Scale Aristocrat 18-6 prop 7000 rpm need two-hand hold remote glow plug battery connection must things would simpler years Ive requests plans Rosenstock see ads has plans early-1960s version youll able get plans new Model Builder before too long bought first kit cant believe Midways Dennyplane want build think aluminum-cowled round OldTimer has dream too years wood cutting first rate plans something else old-timer old-fashioned plan always some mistake few details doesnt matter since need lines pin down spars longerons etc plan certainly authentic mid-30s box has original Dennyplane labels picture Denny himselfwith goggles Typical day theres block listing guys drew traced whatever signed off including ol Reggie himself some other modem names No cross sections no rib patterns outline side view. s way Im delighted know fineflying ancient model actually looks like airplane took plunge because showed pictures Dennyplanes got me. may go first Sigs new Kaydet Senior big bird trainer bigger Eagle three channels lots openframe stuff fuselage once flew planes like 19s rudder-only control almost no elevatorsnot throttle have aileron jobs already know can enjoy floating around like bird soaring heavens isnt very windy Designer Claude McCullough has going back silk dope can Continued page 147 May1986143 CD CD 0 z 0 z 0 C/ 0 -u 0 -u m m 0 Q H CD n 0 0 C/ 0 C, 0 0 31 0 ThJ Lr N CD C, N x x x x x 01 x x x U Available NowThe New Breed Sachs/DolmarLightst weight hand start ready-to-mount engines market 31 $27500 34- $34500 37 $35500 42- $37500 Engines Complete Nothing Extra Buy Choice points 1SIba2z-SYaHP34-5Ibsftoz-65P37-SIhs4oz-CtaHP42-5Vjs3oi-7MP CDI IgnitionOption engines Throttle-coupled spark advance Features CustomIz newest German engines parts ler t ting Bolts sure Tap smoke Carburetor Linkage Ignition ICH Eiectronicsl Ignition Peck ty Switch lt Hub stor Spk Pigs Warranty Fauity Parts Workmanship T G Mfg 857 High Mountain Rd North Haiedon NJ 07508 e 201 427-3845 Plane Talk/Winter Continued page 143 enjoy does will use spoilers see article February issue plan new wrinkle hate install ailerons tape Bill Evans now AMA Museumcompany demo Slow Motion Electric Astro 25 14 cells 12 Ah capacity conned Bill roaring success direct driveaerobatics plus soaring over hour high-speed inverted flybys got five-year-old kid fly attention wanderedyou could see him watching other airplanes Yet Slow Motion sailing wide circles wide open piped 60 Desperado Evans hates stabilizers Des perado published April 1984 issue magazine has cathedral huge towering tail Stable rock course does what consider fearful high-speed aerobatics film paused ask wanted 60-powered Desperado subscribe old-fashioned explanation dihedral works plane could fly would nearly unflyable tractable Slow Motion published MA Ive told Bill could spec version match SloMo fine now has picture Dasher 60and like am willing tackle 60 Dasher max 40 power What am saying Actually Id feel good hot 25but am double-dared 74 tape showed Giant Scale CAPso pretty Look close gosh no stabilizer flights tape better what can stab Its called T-CAP slowed-up tendencies CAP stall vanished stab Slow slow fly bys tips quivering Yes hot Tschirgis crazy giant tailless Stik wonders bother making boring tail surfaces Airfoils CG locations make possible things see Thank Lord Purple Plan golden Octobers Bill Winter 4432 Altura Ct Fairfax VA 22030 Can talk ask pictures returned accompanying envelope obviously cannot use wonderful things Dont have negatives making prints ones send wont priceless Others would like see please include stamped pre-addressed envelopes least stamp Try use influence postman wont ask excess postage responding advertIsers mentIon read aboutthem ModelAviation Radio Technique/Myers Continued page 43 utor Salt Lake City area fourchannel two-stick 75 MHz radios stock time said Go ahead wont make difference also talked established hobby shop owner nearby village told RC airplanes dont sell around cant keep enough off-road RC cars stock first radio went back distributor its easy see retailers arent bad guys situation hope see suggested Bob Aberle back 1982 fre quencies divided mentioned again column June 85 discussed AMA Frequency Committee meeting November 85 reiterated John Prestons column April 86 issue wit Weve got get manufac turers permanently mark 75MHz radios use aircraft 72 MHz radios Aircraft Only right factory markings arent permanent arent put factory wont have effect probably wont happen until 1988 shared channels go away think ought put some effort making happen Ive really buried letters Please Introducing. irekIIn RIC Idle-Bar Glow Plugs Long Short Also.Only $169 Traditional line non-idle bar Glow Plugs a Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $129 Swanson Associates PO Box 151 Wayne NJS948 07470 m Custom Built Models 2036 N Thorn Ave Fresco CA 93704 em 6 pmOrder Phone 209 233-1050ask Bill If you LOVE fly HATE build Contact e solution probleml Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc - IF1yWhatIBuu1d May1986 147 lie Koush Laser Kit TG Reg $24995 hardware -$27995 SYNTHETIC LUBRICANTS CASTOR LUBRICANTS POWER ADDITIVES FREE CATALOG INcODUCT INFOTIPS UDES~ 800-242-0489 777 j3#7 Pt Box 11343 154tt57 219-749-1489
Edition: Model Aviation - 1986/05
Page Numbers: 22, 23, 24, 25, 26, 28, 139, 142, 143, 147
Bill Winter 0 Plane Talk THEY SAY can tell man books tell fellows largely kinds models build fly Before column sets sail three-yearjourney search Great White Whale owe landmark Resisting impulse explore Mice-in-Wonderland science preparing competition Scale documentation cal culated science thought-controlling judges show em everything show em nuttin known documentation done its own sake can become book book about Albatrossthe double S tells about Scale Albatros 5 WW German fighter Things such grow like ivy Lets begin Tom McCoy picture Lanzos RC-l radio job 1934 appeared column three months ago Aware McCoy old buddy Chet Lanzo asked both photos background resulted threeview Chets exciting photos presented two months back During 1980 bull session Chet men tioned drawing plans forgotten wun derkind remark went over Toms head until saw Chet fly pretty bird SAM Champs Westover AFB 1982 supposes knew what looking subsequent meet Cleveland Tom realized earliest-ever RC jobs Chet gave him plans romance RC-l began happened Toms photos RC-l arrived docu mentation book Albatross did color shots stable superbly-built OldTimers Antiques exquisite Tom demon competitior well 1984 alone compressed-air King Burd took first SAM Champs RC-1 won another Michigan State Champs DRCC OldTimer still another RC Old-Timer Detroit Expo second OldTimer Toledo Lanzo Bomber OldTimer won first MRCA Show second Detroit RC contest third New York State Championships Building 38 years Tom joined AMA Detroit Balsa Bugs 12 1952 Junior AMA Champion winning Cooper Brothers Trophy Indoor Rubber 19 flew first RC Berkeley Cavalier Citizen ship 465 equipment Having published first license free RC plans ever MAN 40s using pre-production sample radio can attest 19-yearLeft Tom McCoy Lanzo Bomber RC first 1983 Toledo Show Tom favors natural yellow silk variations trademark color schemes consisting blue black trim often white striping set things off Above Compressed air King Burd atthe 1982 MichIgan State Meet boxy Robin-like modeiwon boththeSAM Champsand MiniChamps Ribs narrowtips wing tail holed forlightness Winterwonders abouta 1 0-1 5 gasfor oran electric motorforhigh-time duration over 40 wins golden oldies mostly firsts seconds Tom McCoys virtual museum pieces show little no sign strenuous competitions show seven examples selected Toms scrapbook really much like Scale documentation book Leading off Albatross design George Reich really turns Winter 80-In semi-cabin design competitive pylon ships Toms model first Dennymite engine now has ignition Super Cyclone piece wood carefully selected holes cut ribs forextra lightness plus lightweight silk covering clear dope finish keeps wing loading 8 oz per sq ft FF 10 RCI Has thick high-lift wing high thrust line shock gearprecisely like original old guy like Tom managed 465 project survivor Alamo Tom founder Detroit RC Club 29 years ago origi nators Toledo RC Exposition also versatile enough have won second Michigan State Meet Lacy 10 M Peanut During 1980s Torns oldies have taken 39 high places Toms documentation time-trip book Tie string around finger. have luck Irish seeing legendary fliers make great flights Lew Mahieu Dooling 29 tiny Zeek Joe Konefes 44-min Bombshell Chicago Roy Nelder launching Moffett winner Copland Jim Cahill Wakefield-winning Clodhopper Wris ton Dague Carl Goldberg diamond Zipper Interceptor Sailplane Valkyrie Cumulus Gordon Light Lanzos Bomber RCs big Puss Moth flew like Mulvihill Kovel KG Bassett talring Eastern States So-Long Elgin Playboy timed Kordas mighty Wakefield flight Aldrich Nobler Yates Madman Palmer often Saftig Zilch 445-pm shoot-outs Speed Walker Goods Kasmirski Orion Bon ner Smog Hog ff1 sat down sky fell Weird So watched among others George Reich Albatross left lifetime impression least 30 years no seemed notice Ive looked plans times published designed 1940 Air Trails Reich two-time Wakefield team mem ber once winning fabled cup Dick Kordas brother-in-law another Cleveland band immortals still builds flies oldies SAM stuff Albatross discovered bang Pylon Free Flight models ruled iron hand good 20 yearsthey alone could handle high power witness modern Satellite Yet like Konefes Reich went cabin design George secret side profile gave high wing like pylon high thrust line made fly like postwar 1950-1960 high-thrust pylons could climb safely dead ahead bored holes sky combi nation Albatross ideal now super-stable loafing around RC assist Old-Timer bag Oddly has lifting-type tail CG one-third wing chord supposes Astro cobalt geared 40 16 cells would get high enough 12 min Electric McCoys book full surprises sort modeling family bible Only notebook gee er featuring Alba tross Xerox some art directors work Id guess alone makes unique page encased protective plastic begins simply pageeverything throughout neatly typedcalled Old-Timer RC Mod el tabulated vital specs flip side against black background old magazine clipped photo guys room 1939 Nats Reich Elgin Korda McCoy others Another page describes original Alabatross along color photo Reich 1982 Lanzo Bomber Thats followed entire construction feature 1941 Air Trails two pages entitled Model Virtually page includes some old clipping involved old-timers relevant models page about engine quote tells work good read Super Cyclone 60 gift old friend Harvey Thomasian Worster MA Harvey old-time engine man particularly famous customtuned K&B engines during late 1 950s early 1 960s Harvey has large collec tion old ignition engines Cy clone certainly beautiful Although Left Toms model very popularTaibi Powerhouse placed second 1983 MIchigan State Old-TimerContest models shown have won other places Right First place Toledo 1982 went Toms rendition Maurice Schoenbruns Gladiator Like other Schoenbruns classics distinguished ample area deep belly high thrust line long tall moment Another cabin model Left Another Lanzo design Record Breaker isa functional parasol nice lines shot Danny Sheelds Americas unofficial Old-Timer goodwill ambassador British events Right Berkeleys Buccaneeretili built great numbers Heres Tom rendition 19308 classic Thanks early RC efforts Joe Raspante design also authentic RC Old-Timer Joeswasa monstrous size May1986 23 Stinson SR-S Megow followed about cowl bumps Winter says did bigger 1934-35 Flying Aces built sizes up 45-in span Bell relates bittrickyto adjust poor glide after power ran out glide improved after wear tear patches previously-siickwing Winter launching Rearwin Speedster indoor Scale meet Bill Bell says Speedster notes cheated Rubber first new models 1980 Once kitted Peerless 24-in-span design Scale designs generous tail area insomewhat beefed up still good flier indoors out Bell photos Tom Schmitt creases Made em fly much better says Left Pleet Trainer another Peerless two profile pilots impressive radial engine nose plug being readied winding stooge second Bell project required dihedral top wing good flight fuil-scale ship nonewhich would fine RC Right Caimly Bell gets off perfect two-hand launch dainty bipe Model has flying wires although cant seen plc its looks may fool new engine well broken-in pleasantly surprised find will turn 8500 rpm 14-4 Tis small world Harvey buddy Hal deBolts roughly 30 years ago published Live Wire-type plane Harvey trike gear Just lately during -scale Vagabond project supplied photos full-scale red-and-white Vag Just today same photos much other documentation sent HA Thomas similar project friend Hartsfield Little Rock Thomas McCoys book turns Propeller Tom says flatly present-day props unsuitable old ignition engines simi larly can tell traditional props best four-stroke engines no 3-in pitches FF useful prop case TF 11-4 has wrong blade shape lower ignition rpms Tom tells us may have heard low-wing Spartan did know also cabin version Bells third project once Comet kit Bill says its often mistaken fora Stinson Note ring cowl circa 1930 struts Neat two-hand launch Bill uses smooth fluid 24 Model Aviation Left Flying through skies Ninjing China Joe Tschirgis Short Stik tailless shortened Giant Stik currently powered 2500cc Supertigre Waibo pumpercarb No trick airfoil elevons widened Does nice wingovers buttall makes crosswind taxiing pain Text detalis Tachirgis expianation symmetrical wing standard zero-zero conventional piane may appearto fly level trim kind Refer diagram below follow discussion Right Can beileve Its Joe Tschirgl Stik its derived Bill Evans tailless technoiogy Older CL Combat fliers may remember Nobody design almost identical approach book has stuff reworking props Lost Ark data coming 1940 Air Age Annual Air Age corporate name MANs publisherbut doubt MAN annual 1940 whereas Air Trails did Thomas article certainly needs republishing Replete wonderful draw ings about methods obtaining truepitch prop includes blade top side profiles 14-8 probably would make Enya 60 four-stroke run like blue blazes Suffice say McCoy constantly pressured great props various hands have impres sive win record INVERTED TRIM PITCHING MOMENT ABLE REGION ANGLE OF ATrACK 4- FROM ZERO LIFT UPRIGHT TRIM POINT s new modeis foiiowed Taylor Cub Peerless Cessna C34 neither shown 24-in Taylor best lot though beefed up Beli states almost lost number times Above Aftera Fokker 0-Vil Scientific made tight turns fine glide good fiying indoors Bill built very beautifui Douglas Vi 0-43 Comet shown two views iost powerfui thermai 1984 now has repiacementversion forflying indoors Below Nicelydetailed resplendent Navy colors Beils F4B-4 American Modeicraft big use indoors waiting forgood outdoorweather Pianetakes six strands Ia-in rubber one-third Toms book states following section presen tation personal about mod els Thats beyond reporting talents Color pictures galore red blue yellow win ribbons Reports various major SAM meets can select some photos Toms models run descriptive captions ways fly alas horde newcomers may never discover before run course Bud Davisson gifted pilot word-maker does the Cockpit series MAN talked Command Air cover January 1986 MAN put extremely well urged Giant Scalers Continued page 26 May198625 Winning Ideas FOURMOST RETRACTABLE iTOWHOOKRELEASE Price 8690 V y4 F Simplest reliable device available After line released hook retracts body unit leaving SMOOTH surface bottom aircraft No special attachments required N eight Y2 oz OTHER FOURMOST PRODUCTS 0491051 AIRFLO ENGINE MOUNT 40 AIRFLO ENGINE MOUNT IDEAL FOR GUICKY 500 PRICE $630 REDUCES DRAG VIBRATION FREE PRICE $300 Fuel Fitting Sets Fuel Shut Off Fuel Manifold Gaplese Hinges Gapless Hinge Slotter Strut Fairings Codcpit Coaming nd SASE Complete Information 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 NEW GLASS FILLED MOTOR MOUNTS 0405 1011 1519 2025 3035 4045 40451 5050 5070 195 225 235 245 265 275 300 325 325 OEM BULK INQUIRES INVITED Featuring LONG GLASS FILLED NYLON FOR STRENGTH AND STABILITY Alignment Lines Mounting Interchangeable Kraft Flat bottom nose gear SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 AREA CODE 513 738-1576 put Technopower radial stand out bipe dont let see giving airplane Warp 9 performance said Let float along Let poke slowly can retrieve running under grabbing Let change pace Bud may have gotten bit carried away indelible experi ence nearly 50 years ago 30-in rubber-powered SE-S Joe Ott design Bud added Youll guy field can zig should have zagged push should have pulled will have airplane gives him plenty time correct mistakes Itll model because does 1/1 scale Two worlds Fly power Fly wing both prithee Bud could speaking old-timers things fly wing goes far beyond old-timers Years ago people tired the wall-to-wall Pattern-type thing escaped RC Sailplanes must have noticed years heavy advertising popularity Flying wing antique fetish What airplane during its aerobatic routine wonderfully fulfilling letting air plane itself almost sheer beauty flight equally fulfilling gotta have power Sailplane has except gravity Zero displacement maybe should keep scrapbooks rainy days doesnt rain gentleman Dihedral Ave address omen never saw Bill Bell come-backer So thousands born-again readers special case course chose specialized beautiful Tom McCoys brilliant pursuit Old-Timers ap preciate Rubber Scaleas us whether fly themBills efforts merit resounding well done As kid during Thirties Bill built Scale models 10- 25- 50-cent kits Megow Comet etc did vast multitude 1980 interest stick-and-tissue birds rekindled discovery Golden Age Reproductions new kit models put out Joe Fitz gibbons Tom Schmitt takes memo rable pictures wanders provides delightful prints make report possible Suppose group few Bill Bells Rubber Scale ships captions does other things too bumped him once flying dream Stearman biplane Flyline Models kit engine lo behold other models old designs case AMA Museum highlights some misdeeds written Bill finishing Albatros D-5 garish streamlined fighting machines WW D-5 some reason makes stupendous flier view pictures way Scale guys will dreaming manner RC things including Giant Continued page 28 26 Model Aviation FCYANOACRYLATE List Sale Savings 1 oz Fast Cure 3-5 Sec 495 $2 500/0 Off 2 oz Fast Cure 3-5 Sec895$396560/0 Off 1 oz Gap-Filling 5 Sec495 $2 50% Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave San Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 408 251-0789 Out StateINFO 408 251-0787 California Hours Mon-Wed Fri & Sat 930-530 Thur 930-900 1200-500 Pronto Retail $3995 Super Pronto Retail $4995 HIGH QUALITY 48 SPAN KIT FOR 09 TO 25 ENGINES FEATURES low wing design high wing stability excellent inverted performance Gentle novice Expert versatile performance 4-6 hour rapid-fire assembly beginner Precision machine-cut SIG balsa plywood spruce Rolled full size plans showing complete wing Step-by-step instructions easy assembly Formed main landing gear Exceptional small field performance May flown ito 3 channels Tested recommended approved b RIO Modeler Magazine Model aviation July 84 Virginia residents add 40/o sales tax Playmate ready now 5 15 pan 50 2 4 cycle TIDEWATER HOBBY ENTERPRISES Route 1 Box 2410 Lanexa Virginia 23089 Lftj9i Phone 804 966-5092 Scale course Rubber Scale guys will go ga-ga little traveling music please . Nanjing China Warning rock slides ahead Set stage cast characters bit background like strange airplanes anybodys impossible novel ties Since violate no aerodynamic law notions airplanes must fly has narrowly rigid Among us little knowledge can dangerous thing Maybe its good challenge traditions live Virginia Im Missouri am open-minded least dozen things including cockeyed dihedral explanations Im far out flexible Ive never seen genuine proof synimetrical-airfoiled wing zero-zero setup cant maintain level flight being trimmed ele vated up down does see strange things however elemental truth am necessarily stupid Okay engineers know some lift must developed situations agree shakily disagree Now time-out introduce Joe Tschir gi writes hotel room opposite side globe Joe respected old-timer fa mous strange airplanes ortho dox Scale models beautiful fliers apt strange Some may re member things like German WW Brandenberg biplane flying boats really strange Scale bird its prop located aft wings conventional fuselage Play mechanics once member own club NVRC prior coming Virginia years ago involved pro fessionally drones stuff knows subject description out-of-control RC model reed Rookie December issue caught eye Joe begins some years Ive trying finish series articles stability control mod els Its natural endeavor since before retiring 18 months ago fooled people believing knew something about sub ject 35 years Anyway question good Pattern models need little no down trim level inverted flight has always bothered Since wife decided masquerade English teachers Nanjing Ive time think about problem believe now have answer Authors Note excellent technical discussions received column one-on-one basis because references mysterious things ob served fun theme best served avoiding esoteric deep stuff example pile brilliant papers pro con relating air ocean debate fills series large manila envelopes Some letters exceed length column making exception Joe Tschirgi hoped reader will drop out Continued page 139 28 Model Aviation DAVE ROBELENS PRONTO AAJfl IIPPR PRAAITA per oreer FAST SERVICE COD ADD $190 Letters Editor Continued page 12 Thus weve filed criminal complaint charges against guy shooting down airplanes flying through sky Its lengthy battle prosecute sin come down home stretch hope will win Now before leave office have recommendation state Lets finish up court case forget about hate Weve lived through three years prob lems some us its rough Lets get sport model avi ation weve suffered long enough Mike Barklow Appleton WI accompanying letter Mike said foregoing poem written 1983 stepping down president Valley Aero Modelers clubs newsletter notpri nted due suit progress Despite best efforts club lost flying field doldrums briefperiod maintaining positive attitude group able establish new flying site rebuild itself now bigger better ever very gratying to organization Mike notes Safety/Preston Continued page 20 about accident members havent heard heres story heard few weeks ago member friend out flying weather fairly cold member standing wing tip friends plane friend attempting start using standard electric starter plastic engagement cone Somehow engine started friend surprised starter slipped off spinner hit ground trigger still depressed strn spin ning plastic cone exploded sending fragments directions friend got small piece through part ear sliver hit member corner eye caine out again doctor says 50% chance will lose eye may have have cornea transplant incident tragic enough itself stop think what could have happened occurred field person hurt innocent bystander kid Weve got keep spectators children out pit area Friends not. comment incident repeat something Ive said several times previously consider pair safety glass es starting model working shop Have safe month John Preston 12235 Tildenwood Dr Rockville MD 20852 Plane Talk/Winter Continued page 28 things become bit sticky Some will understand presentation its entirety am fortunates can interpret comments virtue simple diagram no math Will prescription fly Ponder photo giant tailless Ugly Stik involves no trick airfoils Follow Joe end youll find other comments play Let assume perfectly symmetric aircraft argument Tschirgi warms up has symmetric airfoils both wing tail thrust line wing tail CG centerline has zero-zero incidence setup also assume fore-and-aft CG position such model trim level flight Since model perfectly symmetric pitch plane its obvious model will also fly straight level verted assumptions solu tion clear leaves another problem can such model trim angle attack except zero tricky part model symmetric angle attack airflow over Behind wing generating lift have downwash evidence vorticity shed wing Its strength centerline strong function aspect ratio normal model configurations downwash small function angle attack concentrated directly down stream model changes angle attack tail sweeps through region Generally results pitching moment curves nonlinear have reduced static stability near zero lift sym metric model assumed stabil izer center downwash field However CG far enough aft static stability can zero unstable region exhibiting positive static margins outside unstable point maximum downwash effect model will have two trim points symmetric model postulated would equal opposite sign lift coefficients best visualized referring illustration fact dynamic pressure re duced wings wake Joe goes also contributes non-linearity course reversal cannot exist unless static stability quite small tail out wakeie CG well aft brings up another interesting point models easy fly some cases easiest have little static Continued page 142 May1986 139 n ou sy SEE- HFE THE BOTTLE OF ZRPJET LEPKED FiND sNIcKE YOU TRIED TO SCRPTCH YOUR GIGGLEEP / 0 ZIin ZSOL 92 span 19-21 lbs $20995 Piper PA-17 Vagabond 84 span 10 lbs $15995 Super P11 92 span 19-21 lbs $18995 Chipahip 90 80 span 1/5 scale $12995 TalIwbeel Assemblies 3-8 lbs$1095 4-9 lbs$1295 10-l8lbs$1495 lOibsaup$1595 Manufacturers Softglass Fast Tape Fast Threads 1/4 Scale Pilots Plans construction models three large sheets eli parts shown full scale Weighs down construction bales plywood Models available F 84-F Thunderetreak Sabre F 100 Super Saber Fighting Falcon Eagle Mirage 2000 21 Fishbed i Blackbird F 104 Scarf ighter Fit types ducted fan units wheel 5 dia 40 80 engines Available also motor ducted fan unit sod canopy Price plan 5000 US dollars includes shipment air mail rolled tube Write free literature InformatIon G Bertella Via Matteotti 248 Gardone VT 25063 Brescia Italy 1981 World Soaring Champ DWIGHT HOLLEY FEATURES Sailplanes lous Electric Planes AS1IOFLIOHT e UNGE e 11113 MOICIS IN STOCK SANYO SANYO SANYOBattery Special NSOOAR Weigh 36 Grams Cut Oficells NEW Lower Price Red Jacket Cut Off cells N1200SCR Weigh 52 Grams $340 1200MAH Now 2 New Super Cells Sanyo N-900SC SCR Cut Off cells $375 Both weigh 39 Grams 3/4 length 1200s same dia N900SC will deliver least 950 MAH N900 SCR will deliver great amperage quickly oELECTRIC MODEL SAILPLANE SPECIALISTSHOLLEYS SILENT FLIGHT FEATURING ONLY STATE OF THE ART ITEMS 03 748-0083 LUCALL OR WRITE FOR FREE DESCRIPTIVE FLYER 151 CHESTNUT RIDGE RD BETHEL CT 06501 U MS SPEED CONTROLLERS e GRAUPNERe ASTROFLIGHT KELLER UNGER Plane Talk/Winter Continued page 139 stabilityat Static margins percent chord would dangerous full-scale aircraft Conventional models have dynam ic stability far excess full-scale aircraft because very low density fact believe modelsparticularly Pat tern RC duration power modelsare dead-beat fundamental pitch modes allows marginally-stable stat ically RC model easily flown Fur ther low static stability high dynamic stability required model going groove same qualities needed Free Flight models handle high powerbut another long story As might have gathered Im con vinced dynamic stability damping important primary factor suc cessful model design primary factor both pitch stability control both RC FF Power also major requirement spiral stability Free Flight models discussion has simplified assuming symmetric model same two-trim-point pitching moment curve possible asym metric model including cambered wing fact inclusion cambered wing may make easier achieve However explanation much involved since cambered airfoils pitching moment necessary ingredient two-static-trim-point mo ment curve certainly flyableI believe have done itI doubt total cause unusual incident Tschirgi continues believe Janomo lie would noticed corrected example bit down elevation fed level flight model would shift negative trim point stay trimmed elevator neu tralized CG assumed moment curve shifted bit forward un stable region would become flat very slightly stable double trim point would vanish very slight amount down elevator trim would make second trim point reappear believe typical condition RC model 0 0 0 0 Ce 0 2 0 Ce Ce m -l 0 2 Cit C F F grooves well remember reed servos fairly wide deadband neutral because use slide switch contacts Hence think model grooved well servo stopped downside deadband Au Eureka finally know Only once before has anyone offered respectful comment observation zero-zero symmetrical wing sometimes gives impression model can remain straight level control input observation flies face truth wing must generate lift hold such attitude Years ago asked Joe Wagner thought such setup could maintain straight level possible Joe replied sym metrical wing changing its angie attack between positive negative over small range trim its doing visible eye wonder now about Wagners ooncept invisible chang ing trim exists necessarily has two limitspositive negative note Tschirgis diagram need understand two trim points calls out shown intersections line labeled Angle Attack Zero Lift say wonder strange out-of-control flight Rookie occurred 1962 Control lost plane inverted overhead low altitude up-trim rolled inverted obviously no downtrim oould inputted inverted since control gone plane circled entire area maintaining constant altitude eventually arriving low overhead original headingat point control regained quick landing plane symmetrical Yo-/3 semi-symmetrical airfoil some angu lar difference some dihedral high thrust line design factors oom bined especially high thrust line low thrust line inverted help maintain impossible level flight probably could servo stopped side neutral Tschirgi said would impart unknowing slight down elevator trim dont forget Tschirgis analysis shows truly142 Model Aviation Ohio 11376 Ridgeway Rd Kensington OH 44427 216223-1950 1 Full Size Plans Ducied Fans 1 J C Trainers_ Wing 60 Size40 SemhSyme Size20 Size See local dealer call us location dealer nearest symmetrical model also could maintain straight level flight under same conditions eye old Rookie generating liftwhen fact lift present law states due strange confluence conditions aerodynamics beyond ken modelers Highly interesting fact modffied Rookie comes close will duplicate inverted phenomenon much heavier balanced one-third chord whereas original lighter CG 40% chord will have noted Joe Tschirgis references balance points balance 40% what new Rcokie surprises people fly its ability go inverted slightest urging remain inverted ease long periods steering such inverted Figure 8s additionally implies non-symmetrical craft kind disposition surfaces thrust line etc could fine-tuned maximize desired end product series de velopment Bats belfry know whats So whats Purple Plan mail brings mention some guys Purple Plan repairs finishing dusty frameworks hanging think AMA should have Purple Plan badge could wear proudlyor pin rear buddy cant get acttogether now alas probably 50% remember did see column year ago Purple Plan important tote keeps up well have rerun item Ive now applied flying keep saying Wait till next year next year field muddy early spring winds blow gets tco hot gets windy again too cold Once snow sleet fog no excuses October sometimes late September November later golden days Like Ba hamas wind III can get two perfect October days makes up year worthwhile make another plane two over months via Purple Plan flying career goes FLYS GREAT IDEAL BEGINNERS AIRPLANE THAT BUILDS IN HALF THE TIME Jig built balsa fuselage 90% Built wing Excellent instructions first time builder Full size plans Decal forms windshield JOHNNIE CASBURN MANUFACTURING CO 5115-SE E Rosedale Fort Worth TX 76112 Day 817/451-7537 t 817/572-1452 always another golden October modified Rookie Enya fourstroke 60 sat unpainted nearly year flies beautifully thrust torque its 14-6 8300-8500 awesome especi ally pulling through tight slowed up close-in aerobatics wont fly helper reminds crewing Giant Scale Aristocrat 18-6 prop 7000 rpm need two-hand hold remote glow plug battery connection must things would simpler years Ive requests plans Rosenstock see ads has plans early-1960s version youll able get plans new Model Builder before too long bought first kit cant believe Midways Dennyplane want build think aluminum-cowled round OldTimer has dream too years wood cutting first rate plans something else old-timer old-fashioned plan always some mistake few details doesnt matter since need lines pin down spars longerons etc plan certainly authentic mid-30s box has original Dennyplane labels picture Denny himselfwith goggles Typical day theres block listing guys drew traced whatever signed off including ol Reggie himself some other modem names No cross sections no rib patterns outline side view. s way Im delighted know fineflying ancient model actually looks like airplane took plunge because showed pictures Dennyplanes got me. may go first Sigs new Kaydet Senior big bird trainer bigger Eagle three channels lots openframe stuff fuselage once flew planes like 19s rudder-only control almost no elevatorsnot throttle have aileron jobs already know can enjoy floating around like bird soaring heavens isnt very windy Designer Claude McCullough has going back silk dope can Continued page 147 May1986143 CD CD 0 z 0 z 0 C/ 0 -u 0 -u m m 0 Q H CD n 0 0 C/ 0 C, 0 0 31 0 ThJ Lr N CD C, N x x x x x 01 x x x U Available NowThe New Breed Sachs/DolmarLightst weight hand start ready-to-mount engines market 31 $27500 34- $34500 37 $35500 42- $37500 Engines Complete Nothing Extra Buy Choice points 1SIba2z-SYaHP34-5Ibsftoz-65P37-SIhs4oz-CtaHP42-5Vjs3oi-7MP CDI IgnitionOption engines Throttle-coupled spark advance Features CustomIz newest German engines parts ler t ting Bolts sure Tap smoke Carburetor Linkage Ignition ICH Eiectronicsl Ignition Peck ty Switch lt Hub stor Spk Pigs Warranty Fauity Parts Workmanship T G Mfg 857 High Mountain Rd North Haiedon NJ 07508 e 201 427-3845 Plane Talk/Winter Continued page 143 enjoy does will use spoilers see article February issue plan new wrinkle hate install ailerons tape Bill Evans now AMA Museumcompany demo Slow Motion Electric Astro 25 14 cells 12 Ah capacity conned Bill roaring success direct driveaerobatics plus soaring over hour high-speed inverted flybys got five-year-old kid fly attention wanderedyou could see him watching other airplanes Yet Slow Motion sailing wide circles wide open piped 60 Desperado Evans hates stabilizers Des perado published April 1984 issue magazine has cathedral huge towering tail Stable rock course does what consider fearful high-speed aerobatics film paused ask wanted 60-powered Desperado subscribe old-fashioned explanation dihedral works plane could fly would nearly unflyable tractable Slow Motion published MA Ive told Bill could spec version match SloMo fine now has picture Dasher 60and like am willing tackle 60 Dasher max 40 power What am saying Actually Id feel good hot 25but am double-dared 74 tape showed Giant Scale CAPso pretty Look close gosh no stabilizer flights tape better what can stab Its called T-CAP slowed-up tendencies CAP stall vanished stab Slow slow fly bys tips quivering Yes hot Tschirgis crazy giant tailless Stik wonders bother making boring tail surfaces Airfoils CG locations make possible things see Thank Lord Purple Plan golden Octobers Bill Winter 4432 Altura Ct Fairfax VA 22030 Can talk ask pictures returned accompanying envelope obviously cannot use wonderful things Dont have negatives making prints ones send wont priceless Others would like see please include stamped pre-addressed envelopes least stamp Try use influence postman wont ask excess postage responding advertIsers mentIon read aboutthem ModelAviation Radio Technique/Myers Continued page 43 utor Salt Lake City area fourchannel two-stick 75 MHz radios stock time said Go ahead wont make difference also talked established hobby shop owner nearby village told RC airplanes dont sell around cant keep enough off-road RC cars stock first radio went back distributor its easy see retailers arent bad guys situation hope see suggested Bob Aberle back 1982 fre quencies divided mentioned again column June 85 discussed AMA Frequency Committee meeting November 85 reiterated John Prestons column April 86 issue wit Weve got get manufac turers permanently mark 75MHz radios use aircraft 72 MHz radios Aircraft Only right factory markings arent permanent arent put factory wont have effect probably wont happen until 1988 shared channels go away think ought put some effort making happen Ive really buried letters Please Introducing. irekIIn RIC Idle-Bar Glow Plugs Long Short Also.Only $169 Traditional line non-idle bar Glow Plugs a Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $129 Swanson Associates PO Box 151 Wayne NJS948 07470 m Custom Built Models 2036 N Thorn Ave Fresco CA 93704 em 6 pmOrder Phone 209 233-1050ask Bill If you LOVE fly HATE build Contact e solution probleml Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc - IF1yWhatIBuu1d May1986 147 lie Koush Laser Kit TG Reg $24995 hardware -$27995 SYNTHETIC LUBRICANTS CASTOR LUBRICANTS POWER ADDITIVES FREE CATALOG INcODUCT INFOTIPS UDES~ 800-242-0489 777 j3#7 Pt Box 11343 154tt57 219-749-1489
Edition: Model Aviation - 1986/05
Page Numbers: 22, 23, 24, 25, 26, 28, 139, 142, 143, 147
Bill Winter 0 Plane Talk THEY SAY can tell man books tell fellows largely kinds models build fly Before column sets sail three-yearjourney search Great White Whale owe landmark Resisting impulse explore Mice-in-Wonderland science preparing competition Scale documentation cal culated science thought-controlling judges show em everything show em nuttin known documentation done its own sake can become book book about Albatrossthe double S tells about Scale Albatros 5 WW German fighter Things such grow like ivy Lets begin Tom McCoy picture Lanzos RC-l radio job 1934 appeared column three months ago Aware McCoy old buddy Chet Lanzo asked both photos background resulted threeview Chets exciting photos presented two months back During 1980 bull session Chet men tioned drawing plans forgotten wun derkind remark went over Toms head until saw Chet fly pretty bird SAM Champs Westover AFB 1982 supposes knew what looking subsequent meet Cleveland Tom realized earliest-ever RC jobs Chet gave him plans romance RC-l began happened Toms photos RC-l arrived docu mentation book Albatross did color shots stable superbly-built OldTimers Antiques exquisite Tom demon competitior well 1984 alone compressed-air King Burd took first SAM Champs RC-1 won another Michigan State Champs DRCC OldTimer still another RC Old-Timer Detroit Expo second OldTimer Toledo Lanzo Bomber OldTimer won first MRCA Show second Detroit RC contest third New York State Championships Building 38 years Tom joined AMA Detroit Balsa Bugs 12 1952 Junior AMA Champion winning Cooper Brothers Trophy Indoor Rubber 19 flew first RC Berkeley Cavalier Citizen ship 465 equipment Having published first license free RC plans ever MAN 40s using pre-production sample radio can attest 19-yearLeft Tom McCoy Lanzo Bomber RC first 1983 Toledo Show Tom favors natural yellow silk variations trademark color schemes consisting blue black trim often white striping set things off Above Compressed air King Burd atthe 1982 MichIgan State Meet boxy Robin-like modeiwon boththeSAM Champsand MiniChamps Ribs narrowtips wing tail holed forlightness Winterwonders abouta 1 0-1 5 gasfor oran electric motorforhigh-time duration over 40 wins golden oldies mostly firsts seconds Tom McCoys virtual museum pieces show little no sign strenuous competitions show seven examples selected Toms scrapbook really much like Scale documentation book Leading off Albatross design George Reich really turns Winter 80-In semi-cabin design competitive pylon ships Toms model first Dennymite engine now has ignition Super Cyclone piece wood carefully selected holes cut ribs forextra lightness plus lightweight silk covering clear dope finish keeps wing loading 8 oz per sq ft FF 10 RCI Has thick high-lift wing high thrust line shock gearprecisely like original old guy like Tom managed 465 project survivor Alamo Tom founder Detroit RC Club 29 years ago origi nators Toledo RC Exposition also versatile enough have won second Michigan State Meet Lacy 10 M Peanut During 1980s Torns oldies have taken 39 high places Toms documentation time-trip book Tie string around finger. have luck Irish seeing legendary fliers make great flights Lew Mahieu Dooling 29 tiny Zeek Joe Konefes 44-min Bombshell Chicago Roy Nelder launching Moffett winner Copland Jim Cahill Wakefield-winning Clodhopper Wris ton Dague Carl Goldberg diamond Zipper Interceptor Sailplane Valkyrie Cumulus Gordon Light Lanzos Bomber RCs big Puss Moth flew like Mulvihill Kovel KG Bassett talring Eastern States So-Long Elgin Playboy timed Kordas mighty Wakefield flight Aldrich Nobler Yates Madman Palmer often Saftig Zilch 445-pm shoot-outs Speed Walker Goods Kasmirski Orion Bon ner Smog Hog ff1 sat down sky fell Weird So watched among others George Reich Albatross left lifetime impression least 30 years no seemed notice Ive looked plans times published designed 1940 Air Trails Reich two-time Wakefield team mem ber once winning fabled cup Dick Kordas brother-in-law another Cleveland band immortals still builds flies oldies SAM stuff Albatross discovered bang Pylon Free Flight models ruled iron hand good 20 yearsthey alone could handle high power witness modern Satellite Yet like Konefes Reich went cabin design George secret side profile gave high wing like pylon high thrust line made fly like postwar 1950-1960 high-thrust pylons could climb safely dead ahead bored holes sky combi nation Albatross ideal now super-stable loafing around RC assist Old-Timer bag Oddly has lifting-type tail CG one-third wing chord supposes Astro cobalt geared 40 16 cells would get high enough 12 min Electric McCoys book full surprises sort modeling family bible Only notebook gee er featuring Alba tross Xerox some art directors work Id guess alone makes unique page encased protective plastic begins simply pageeverything throughout neatly typedcalled Old-Timer RC Mod el tabulated vital specs flip side against black background old magazine clipped photo guys room 1939 Nats Reich Elgin Korda McCoy others Another page describes original Alabatross along color photo Reich 1982 Lanzo Bomber Thats followed entire construction feature 1941 Air Trails two pages entitled Model Virtually page includes some old clipping involved old-timers relevant models page about engine quote tells work good read Super Cyclone 60 gift old friend Harvey Thomasian Worster MA Harvey old-time engine man particularly famous customtuned K&B engines during late 1 950s early 1 960s Harvey has large collec tion old ignition engines Cy clone certainly beautiful Although Left Toms model very popularTaibi Powerhouse placed second 1983 MIchigan State Old-TimerContest models shown have won other places Right First place Toledo 1982 went Toms rendition Maurice Schoenbruns Gladiator Like other Schoenbruns classics distinguished ample area deep belly high thrust line long tall moment Another cabin model Left Another Lanzo design Record Breaker isa functional parasol nice lines shot Danny Sheelds Americas unofficial Old-Timer goodwill ambassador British events Right Berkeleys Buccaneeretili built great numbers Heres Tom rendition 19308 classic Thanks early RC efforts Joe Raspante design also authentic RC Old-Timer Joeswasa monstrous size May1986 23 Stinson SR-S Megow followed about cowl bumps Winter says did bigger 1934-35 Flying Aces built sizes up 45-in span Bell relates bittrickyto adjust poor glide after power ran out glide improved after wear tear patches previously-siickwing Winter launching Rearwin Speedster indoor Scale meet Bill Bell says Speedster notes cheated Rubber first new models 1980 Once kitted Peerless 24-in-span design Scale designs generous tail area insomewhat beefed up still good flier indoors out Bell photos Tom Schmitt creases Made em fly much better says Left Pleet Trainer another Peerless two profile pilots impressive radial engine nose plug being readied winding stooge second Bell project required dihedral top wing good flight fuil-scale ship nonewhich would fine RC Right Caimly Bell gets off perfect two-hand launch dainty bipe Model has flying wires although cant seen plc its looks may fool new engine well broken-in pleasantly surprised find will turn 8500 rpm 14-4 Tis small world Harvey buddy Hal deBolts roughly 30 years ago published Live Wire-type plane Harvey trike gear Just lately during -scale Vagabond project supplied photos full-scale red-and-white Vag Just today same photos much other documentation sent HA Thomas similar project friend Hartsfield Little Rock Thomas McCoys book turns Propeller Tom says flatly present-day props unsuitable old ignition engines simi larly can tell traditional props best four-stroke engines no 3-in pitches FF useful prop case TF 11-4 has wrong blade shape lower ignition rpms Tom tells us may have heard low-wing Spartan did know also cabin version Bells third project once Comet kit Bill says its often mistaken fora Stinson Note ring cowl circa 1930 struts Neat two-hand launch Bill uses smooth fluid 24 Model Aviation Left Flying through skies Ninjing China Joe Tschirgis Short Stik tailless shortened Giant Stik currently powered 2500cc Supertigre Waibo pumpercarb No trick airfoil elevons widened Does nice wingovers buttall makes crosswind taxiing pain Text detalis Tachirgis expianation symmetrical wing standard zero-zero conventional piane may appearto fly level trim kind Refer diagram below follow discussion Right Can beileve Its Joe Tschirgl Stik its derived Bill Evans tailless technoiogy Older CL Combat fliers may remember Nobody design almost identical approach book has stuff reworking props Lost Ark data coming 1940 Air Age Annual Air Age corporate name MANs publisherbut doubt MAN annual 1940 whereas Air Trails did Thomas article certainly needs republishing Replete wonderful draw ings about methods obtaining truepitch prop includes blade top side profiles 14-8 probably would make Enya 60 four-stroke run like blue blazes Suffice say McCoy constantly pressured great props various hands have impres sive win record INVERTED TRIM PITCHING MOMENT ABLE REGION ANGLE OF ATrACK 4- FROM ZERO LIFT UPRIGHT TRIM POINT s new modeis foiiowed Taylor Cub Peerless Cessna C34 neither shown 24-in Taylor best lot though beefed up Beli states almost lost number times Above Aftera Fokker 0-Vil Scientific made tight turns fine glide good fiying indoors Bill built very beautifui Douglas Vi 0-43 Comet shown two views iost powerfui thermai 1984 now has repiacementversion forflying indoors Below Nicelydetailed resplendent Navy colors Beils F4B-4 American Modeicraft big use indoors waiting forgood outdoorweather Pianetakes six strands Ia-in rubber one-third Toms book states following section presen tation personal about mod els Thats beyond reporting talents Color pictures galore red blue yellow win ribbons Reports various major SAM meets can select some photos Toms models run descriptive captions ways fly alas horde newcomers may never discover before run course Bud Davisson gifted pilot word-maker does the Cockpit series MAN talked Command Air cover January 1986 MAN put extremely well urged Giant Scalers Continued page 26 May198625 Winning Ideas FOURMOST RETRACTABLE iTOWHOOKRELEASE Price 8690 V y4 F Simplest reliable device available After line released hook retracts body unit leaving SMOOTH surface bottom aircraft No special attachments required N eight Y2 oz OTHER FOURMOST PRODUCTS 0491051 AIRFLO ENGINE MOUNT 40 AIRFLO ENGINE MOUNT IDEAL FOR GUICKY 500 PRICE $630 REDUCES DRAG VIBRATION FREE PRICE $300 Fuel Fitting Sets Fuel Shut Off Fuel Manifold Gaplese Hinges Gapless Hinge Slotter Strut Fairings Codcpit Coaming nd SASE Complete Information 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 NEW GLASS FILLED MOTOR MOUNTS 0405 1011 1519 2025 3035 4045 40451 5050 5070 195 225 235 245 265 275 300 325 325 OEM BULK INQUIRES INVITED Featuring LONG GLASS FILLED NYLON FOR STRENGTH AND STABILITY Alignment Lines Mounting Interchangeable Kraft Flat bottom nose gear SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 AREA CODE 513 738-1576 put Technopower radial stand out bipe dont let see giving airplane Warp 9 performance said Let float along Let poke slowly can retrieve running under grabbing Let change pace Bud may have gotten bit carried away indelible experi ence nearly 50 years ago 30-in rubber-powered SE-S Joe Ott design Bud added Youll guy field can zig should have zagged push should have pulled will have airplane gives him plenty time correct mistakes Itll model because does 1/1 scale Two worlds Fly power Fly wing both prithee Bud could speaking old-timers things fly wing goes far beyond old-timers Years ago people tired the wall-to-wall Pattern-type thing escaped RC Sailplanes must have noticed years heavy advertising popularity Flying wing antique fetish What airplane during its aerobatic routine wonderfully fulfilling letting air plane itself almost sheer beauty flight equally fulfilling gotta have power Sailplane has except gravity Zero displacement maybe should keep scrapbooks rainy days doesnt rain gentleman Dihedral Ave address omen never saw Bill Bell come-backer So thousands born-again readers special case course chose specialized beautiful Tom McCoys brilliant pursuit Old-Timers ap preciate Rubber Scaleas us whether fly themBills efforts merit resounding well done As kid during Thirties Bill built Scale models 10- 25- 50-cent kits Megow Comet etc did vast multitude 1980 interest stick-and-tissue birds rekindled discovery Golden Age Reproductions new kit models put out Joe Fitz gibbons Tom Schmitt takes memo rable pictures wanders provides delightful prints make report possible Suppose group few Bill Bells Rubber Scale ships captions does other things too bumped him once flying dream Stearman biplane Flyline Models kit engine lo behold other models old designs case AMA Museum highlights some misdeeds written Bill finishing Albatros D-5 garish streamlined fighting machines WW D-5 some reason makes stupendous flier view pictures way Scale guys will dreaming manner RC things including Giant Continued page 28 26 Model Aviation FCYANOACRYLATE List Sale Savings 1 oz Fast Cure 3-5 Sec 495 $2 500/0 Off 2 oz Fast Cure 3-5 Sec895$396560/0 Off 1 oz Gap-Filling 5 Sec495 $2 50% Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave San Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 408 251-0789 Out StateINFO 408 251-0787 California Hours Mon-Wed Fri & Sat 930-530 Thur 930-900 1200-500 Pronto Retail $3995 Super Pronto Retail $4995 HIGH QUALITY 48 SPAN KIT FOR 09 TO 25 ENGINES FEATURES low wing design high wing stability excellent inverted performance Gentle novice Expert versatile performance 4-6 hour rapid-fire assembly beginner Precision machine-cut SIG balsa plywood spruce Rolled full size plans showing complete wing Step-by-step instructions easy assembly Formed main landing gear Exceptional small field performance May flown ito 3 channels Tested recommended approved b RIO Modeler Magazine Model aviation July 84 Virginia residents add 40/o sales tax Playmate ready now 5 15 pan 50 2 4 cycle TIDEWATER HOBBY ENTERPRISES Route 1 Box 2410 Lanexa Virginia 23089 Lftj9i Phone 804 966-5092 Scale course Rubber Scale guys will go ga-ga little traveling music please . Nanjing China Warning rock slides ahead Set stage cast characters bit background like strange airplanes anybodys impossible novel ties Since violate no aerodynamic law notions airplanes must fly has narrowly rigid Among us little knowledge can dangerous thing Maybe its good challenge traditions live Virginia Im Missouri am open-minded least dozen things including cockeyed dihedral explanations Im far out flexible Ive never seen genuine proof synimetrical-airfoiled wing zero-zero setup cant maintain level flight being trimmed ele vated up down does see strange things however elemental truth am necessarily stupid Okay engineers know some lift must developed situations agree shakily disagree Now time-out introduce Joe Tschir gi writes hotel room opposite side globe Joe respected old-timer fa mous strange airplanes ortho dox Scale models beautiful fliers apt strange Some may re member things like German WW Brandenberg biplane flying boats really strange Scale bird its prop located aft wings conventional fuselage Play mechanics once member own club NVRC prior coming Virginia years ago involved pro fessionally drones stuff knows subject description out-of-control RC model reed Rookie December issue caught eye Joe begins some years Ive trying finish series articles stability control mod els Its natural endeavor since before retiring 18 months ago fooled people believing knew something about sub ject 35 years Anyway question good Pattern models need little no down trim level inverted flight has always bothered Since wife decided masquerade English teachers Nanjing Ive time think about problem believe now have answer Authors Note excellent technical discussions received column one-on-one basis because references mysterious things ob served fun theme best served avoiding esoteric deep stuff example pile brilliant papers pro con relating air ocean debate fills series large manila envelopes Some letters exceed length column making exception Joe Tschirgi hoped reader will drop out Continued page 139 28 Model Aviation DAVE ROBELENS PRONTO AAJfl IIPPR PRAAITA per oreer FAST SERVICE COD ADD $190 Letters Editor Continued page 12 Thus weve filed criminal complaint charges against guy shooting down airplanes flying through sky Its lengthy battle prosecute sin come down home stretch hope will win Now before leave office have recommendation state Lets finish up court case forget about hate Weve lived through three years prob lems some us its rough Lets get sport model avi ation weve suffered long enough Mike Barklow Appleton WI accompanying letter Mike said foregoing poem written 1983 stepping down president Valley Aero Modelers clubs newsletter notpri nted due suit progress Despite best efforts club lost flying field doldrums briefperiod maintaining positive attitude group able establish new flying site rebuild itself now bigger better ever very gratying to organization Mike notes Safety/Preston Continued page 20 about accident members havent heard heres story heard few weeks ago member friend out flying weather fairly cold member standing wing tip friends plane friend attempting start using standard electric starter plastic engagement cone Somehow engine started friend surprised starter slipped off spinner hit ground trigger still depressed strn spin ning plastic cone exploded sending fragments directions friend got small piece through part ear sliver hit member corner eye caine out again doctor says 50% chance will lose eye may have have cornea transplant incident tragic enough itself stop think what could have happened occurred field person hurt innocent bystander kid Weve got keep spectators children out pit area Friends not. comment incident repeat something Ive said several times previously consider pair safety glass es starting model working shop Have safe month John Preston 12235 Tildenwood Dr Rockville MD 20852 Plane Talk/Winter Continued page 28 things become bit sticky Some will understand presentation its entirety am fortunates can interpret comments virtue simple diagram no math Will prescription fly Ponder photo giant tailless Ugly Stik involves no trick airfoils Follow Joe end youll find other comments play Let assume perfectly symmetric aircraft argument Tschirgi warms up has symmetric airfoils both wing tail thrust line wing tail CG centerline has zero-zero incidence setup also assume fore-and-aft CG position such model trim level flight Since model perfectly symmetric pitch plane its obvious model will also fly straight level verted assumptions solu tion clear leaves another problem can such model trim angle attack except zero tricky part model symmetric angle attack airflow over Behind wing generating lift have downwash evidence vorticity shed wing Its strength centerline strong function aspect ratio normal model configurations downwash small function angle attack concentrated directly down stream model changes angle attack tail sweeps through region Generally results pitching moment curves nonlinear have reduced static stability near zero lift sym metric model assumed stabil izer center downwash field However CG far enough aft static stability can zero unstable region exhibiting positive static margins outside unstable point maximum downwash effect model will have two trim points symmetric model postulated would equal opposite sign lift coefficients best visualized referring illustration fact dynamic pressure re duced wings wake Joe goes also contributes non-linearity course reversal cannot exist unless static stability quite small tail out wakeie CG well aft brings up another interesting point models easy fly some cases easiest have little static Continued page 142 May1986 139 n ou sy SEE- HFE THE BOTTLE OF ZRPJET LEPKED FiND sNIcKE YOU TRIED TO SCRPTCH YOUR GIGGLEEP / 0 ZIin ZSOL 92 span 19-21 lbs $20995 Piper PA-17 Vagabond 84 span 10 lbs $15995 Super P11 92 span 19-21 lbs $18995 Chipahip 90 80 span 1/5 scale $12995 TalIwbeel Assemblies 3-8 lbs$1095 4-9 lbs$1295 10-l8lbs$1495 lOibsaup$1595 Manufacturers Softglass Fast Tape Fast Threads 1/4 Scale Pilots Plans construction models three large sheets eli parts shown full scale Weighs down construction bales plywood Models available F 84-F Thunderetreak Sabre F 100 Super Saber Fighting Falcon Eagle Mirage 2000 21 Fishbed i Blackbird F 104 Scarf ighter Fit types ducted fan units wheel 5 dia 40 80 engines Available also motor ducted fan unit sod canopy Price plan 5000 US dollars includes shipment air mail rolled tube Write free literature InformatIon G Bertella Via Matteotti 248 Gardone VT 25063 Brescia Italy 1981 World Soaring Champ DWIGHT HOLLEY FEATURES Sailplanes lous Electric Planes AS1IOFLIOHT e UNGE e 11113 MOICIS IN STOCK SANYO SANYO SANYOBattery Special NSOOAR Weigh 36 Grams Cut Oficells NEW Lower Price Red Jacket Cut Off cells N1200SCR Weigh 52 Grams $340 1200MAH Now 2 New Super Cells Sanyo N-900SC SCR Cut Off cells $375 Both weigh 39 Grams 3/4 length 1200s same dia N900SC will deliver least 950 MAH N900 SCR will deliver great amperage quickly oELECTRIC MODEL SAILPLANE SPECIALISTSHOLLEYS SILENT FLIGHT FEATURING ONLY STATE OF THE ART ITEMS 03 748-0083 LUCALL OR WRITE FOR FREE DESCRIPTIVE FLYER 151 CHESTNUT RIDGE RD BETHEL CT 06501 U MS SPEED CONTROLLERS e GRAUPNERe ASTROFLIGHT KELLER UNGER Plane Talk/Winter Continued page 139 stabilityat Static margins percent chord would dangerous full-scale aircraft Conventional models have dynam ic stability far excess full-scale aircraft because very low density fact believe modelsparticularly Pat tern RC duration power modelsare dead-beat fundamental pitch modes allows marginally-stable stat ically RC model easily flown Fur ther low static stability high dynamic stability required model going groove same qualities needed Free Flight models handle high powerbut another long story As might have gathered Im con vinced dynamic stability damping important primary factor suc cessful model design primary factor both pitch stability control both RC FF Power also major requirement spiral stability Free Flight models discussion has simplified assuming symmetric model same two-trim-point pitching moment curve possible asym metric model including cambered wing fact inclusion cambered wing may make easier achieve However explanation much involved since cambered airfoils pitching moment necessary ingredient two-static-trim-point mo ment curve certainly flyableI believe have done itI doubt total cause unusual incident Tschirgi continues believe Janomo lie would noticed corrected example bit down elevation fed level flight model would shift negative trim point stay trimmed elevator neu tralized CG assumed moment curve shifted bit forward un stable region would become flat very slightly stable double trim point would vanish very slight amount down elevator trim would make second trim point reappear believe typical condition RC model 0 0 0 0 Ce 0 2 0 Ce Ce m -l 0 2 Cit C F F grooves well remember reed servos fairly wide deadband neutral because use slide switch contacts Hence think model grooved well servo stopped downside deadband Au Eureka finally know Only once before has anyone offered respectful comment observation zero-zero symmetrical wing sometimes gives impression model can remain straight level control input observation flies face truth wing must generate lift hold such attitude Years ago asked Joe Wagner thought such setup could maintain straight level possible Joe replied sym metrical wing changing its angie attack between positive negative over small range trim its doing visible eye wonder now about Wagners ooncept invisible chang ing trim exists necessarily has two limitspositive negative note Tschirgis diagram need understand two trim points calls out shown intersections line labeled Angle Attack Zero Lift say wonder strange out-of-control flight Rookie occurred 1962 Control lost plane inverted overhead low altitude up-trim rolled inverted obviously no downtrim oould inputted inverted since control gone plane circled entire area maintaining constant altitude eventually arriving low overhead original headingat point control regained quick landing plane symmetrical Yo-/3 semi-symmetrical airfoil some angu lar difference some dihedral high thrust line design factors oom bined especially high thrust line low thrust line inverted help maintain impossible level flight probably could servo stopped side neutral Tschirgi said would impart unknowing slight down elevator trim dont forget Tschirgis analysis shows truly142 Model Aviation Ohio 11376 Ridgeway Rd Kensington OH 44427 216223-1950 1 Full Size Plans Ducied Fans 1 J C Trainers_ Wing 60 Size40 SemhSyme Size20 Size See local dealer call us location dealer nearest symmetrical model also could maintain straight level flight under same conditions eye old Rookie generating liftwhen fact lift present law states due strange confluence conditions aerodynamics beyond ken modelers Highly interesting fact modffied Rookie comes close will duplicate inverted phenomenon much heavier balanced one-third chord whereas original lighter CG 40% chord will have noted Joe Tschirgis references balance points balance 40% what new Rcokie surprises people fly its ability go inverted slightest urging remain inverted ease long periods steering such inverted Figure 8s additionally implies non-symmetrical craft kind disposition surfaces thrust line etc could fine-tuned maximize desired end product series de velopment Bats belfry know whats So whats Purple Plan mail brings mention some guys Purple Plan repairs finishing dusty frameworks hanging think AMA should have Purple Plan badge could wear proudlyor pin rear buddy cant get acttogether now alas probably 50% remember did see column year ago Purple Plan important tote keeps up well have rerun item Ive now applied flying keep saying Wait till next year next year field muddy early spring winds blow gets tco hot gets windy again too cold Once snow sleet fog no excuses October sometimes late September November later golden days Like Ba hamas wind III can get two perfect October days makes up year worthwhile make another plane two over months via Purple Plan flying career goes FLYS GREAT IDEAL BEGINNERS AIRPLANE THAT BUILDS IN HALF THE TIME Jig built balsa fuselage 90% Built wing Excellent instructions first time builder Full size plans Decal forms windshield JOHNNIE CASBURN MANUFACTURING CO 5115-SE E Rosedale Fort Worth TX 76112 Day 817/451-7537 t 817/572-1452 always another golden October modified Rookie Enya fourstroke 60 sat unpainted nearly year flies beautifully thrust torque its 14-6 8300-8500 awesome especi ally pulling through tight slowed up close-in aerobatics wont fly helper reminds crewing Giant Scale Aristocrat 18-6 prop 7000 rpm need two-hand hold remote glow plug battery connection must things would simpler years Ive requests plans Rosenstock see ads has plans early-1960s version youll able get plans new Model Builder before too long bought first kit cant believe Midways Dennyplane want build think aluminum-cowled round OldTimer has dream too years wood cutting first rate plans something else old-timer old-fashioned plan always some mistake few details doesnt matter since need lines pin down spars longerons etc plan certainly authentic mid-30s box has original Dennyplane labels picture Denny himselfwith goggles Typical day theres block listing guys drew traced whatever signed off including ol Reggie himself some other modem names No cross sections no rib patterns outline side view. s way Im delighted know fineflying ancient model actually looks like airplane took plunge because showed pictures Dennyplanes got me. may go first Sigs new Kaydet Senior big bird trainer bigger Eagle three channels lots openframe stuff fuselage once flew planes like 19s rudder-only control almost no elevatorsnot throttle have aileron jobs already know can enjoy floating around like bird soaring heavens isnt very windy Designer Claude McCullough has going back silk dope can Continued page 147 May1986143 CD CD 0 z 0 z 0 C/ 0 -u 0 -u m m 0 Q H CD n 0 0 C/ 0 C, 0 0 31 0 ThJ Lr N CD C, N x x x x x 01 x x x U Available NowThe New Breed Sachs/DolmarLightst weight hand start ready-to-mount engines market 31 $27500 34- $34500 37 $35500 42- $37500 Engines Complete Nothing Extra Buy Choice points 1SIba2z-SYaHP34-5Ibsftoz-65P37-SIhs4oz-CtaHP42-5Vjs3oi-7MP CDI IgnitionOption engines Throttle-coupled spark advance Features CustomIz newest German engines parts ler t ting Bolts sure Tap smoke Carburetor Linkage Ignition ICH Eiectronicsl Ignition Peck ty Switch lt Hub stor Spk Pigs Warranty Fauity Parts Workmanship T G Mfg 857 High Mountain Rd North Haiedon NJ 07508 e 201 427-3845 Plane Talk/Winter Continued page 143 enjoy does will use spoilers see article February issue plan new wrinkle hate install ailerons tape Bill Evans now AMA Museumcompany demo Slow Motion Electric Astro 25 14 cells 12 Ah capacity conned Bill roaring success direct driveaerobatics plus soaring over hour high-speed inverted flybys got five-year-old kid fly attention wanderedyou could see him watching other airplanes Yet Slow Motion sailing wide circles wide open piped 60 Desperado Evans hates stabilizers Des perado published April 1984 issue magazine has cathedral huge towering tail Stable rock course does what consider fearful high-speed aerobatics film paused ask wanted 60-powered Desperado subscribe old-fashioned explanation dihedral works plane could fly would nearly unflyable tractable Slow Motion published MA Ive told Bill could spec version match SloMo fine now has picture Dasher 60and like am willing tackle 60 Dasher max 40 power What am saying Actually Id feel good hot 25but am double-dared 74 tape showed Giant Scale CAPso pretty Look close gosh no stabilizer flights tape better what can stab Its called T-CAP slowed-up tendencies CAP stall vanished stab Slow slow fly bys tips quivering Yes hot Tschirgis crazy giant tailless Stik wonders bother making boring tail surfaces Airfoils CG locations make possible things see Thank Lord Purple Plan golden Octobers Bill Winter 4432 Altura Ct Fairfax VA 22030 Can talk ask pictures returned accompanying envelope obviously cannot use wonderful things Dont have negatives making prints ones send wont priceless Others would like see please include stamped pre-addressed envelopes least stamp Try use influence postman wont ask excess postage responding advertIsers mentIon read aboutthem ModelAviation Radio Technique/Myers Continued page 43 utor Salt Lake City area fourchannel two-stick 75 MHz radios stock time said Go ahead wont make difference also talked established hobby shop owner nearby village told RC airplanes dont sell around cant keep enough off-road RC cars stock first radio went back distributor its easy see retailers arent bad guys situation hope see suggested Bob Aberle back 1982 fre quencies divided mentioned again column June 85 discussed AMA Frequency Committee meeting November 85 reiterated John Prestons column April 86 issue wit Weve got get manufac turers permanently mark 75MHz radios use aircraft 72 MHz radios Aircraft Only right factory markings arent permanent arent put factory wont have effect probably wont happen until 1988 shared channels go away think ought put some effort making happen Ive really buried letters Please Introducing. irekIIn RIC Idle-Bar Glow Plugs Long Short Also.Only $169 Traditional line non-idle bar Glow Plugs a Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $129 Swanson Associates PO Box 151 Wayne NJS948 07470 m Custom Built Models 2036 N Thorn Ave Fresco CA 93704 em 6 pmOrder Phone 209 233-1050ask Bill If you LOVE fly HATE build Contact e solution probleml Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc - IF1yWhatIBuu1d May1986 147 lie Koush Laser Kit TG Reg $24995 hardware -$27995 SYNTHETIC LUBRICANTS CASTOR LUBRICANTS POWER ADDITIVES FREE CATALOG INcODUCT INFOTIPS UDES~ 800-242-0489 777 j3#7 Pt Box 11343 154tt57 219-749-1489
Edition: Model Aviation - 1986/05
Page Numbers: 22, 23, 24, 25, 26, 28, 139, 142, 143, 147
Bill Winter 0 Plane Talk THEY SAY can tell man books tell fellows largely kinds models build fly Before column sets sail three-yearjourney search Great White Whale owe landmark Resisting impulse explore Mice-in-Wonderland science preparing competition Scale documentation cal culated science thought-controlling judges show em everything show em nuttin known documentation done its own sake can become book book about Albatrossthe double S tells about Scale Albatros 5 WW German fighter Things such grow like ivy Lets begin Tom McCoy picture Lanzos RC-l radio job 1934 appeared column three months ago Aware McCoy old buddy Chet Lanzo asked both photos background resulted threeview Chets exciting photos presented two months back During 1980 bull session Chet men tioned drawing plans forgotten wun derkind remark went over Toms head until saw Chet fly pretty bird SAM Champs Westover AFB 1982 supposes knew what looking subsequent meet Cleveland Tom realized earliest-ever RC jobs Chet gave him plans romance RC-l began happened Toms photos RC-l arrived docu mentation book Albatross did color shots stable superbly-built OldTimers Antiques exquisite Tom demon competitior well 1984 alone compressed-air King Burd took first SAM Champs RC-1 won another Michigan State Champs DRCC OldTimer still another RC Old-Timer Detroit Expo second OldTimer Toledo Lanzo Bomber OldTimer won first MRCA Show second Detroit RC contest third New York State Championships Building 38 years Tom joined AMA Detroit Balsa Bugs 12 1952 Junior AMA Champion winning Cooper Brothers Trophy Indoor Rubber 19 flew first RC Berkeley Cavalier Citizen ship 465 equipment Having published first license free RC plans ever MAN 40s using pre-production sample radio can attest 19-yearLeft Tom McCoy Lanzo Bomber RC first 1983 Toledo Show Tom favors natural yellow silk variations trademark color schemes consisting blue black trim often white striping set things off Above Compressed air King Burd atthe 1982 MichIgan State Meet boxy Robin-like modeiwon boththeSAM Champsand MiniChamps Ribs narrowtips wing tail holed forlightness Winterwonders abouta 1 0-1 5 gasfor oran electric motorforhigh-time duration over 40 wins golden oldies mostly firsts seconds Tom McCoys virtual museum pieces show little no sign strenuous competitions show seven examples selected Toms scrapbook really much like Scale documentation book Leading off Albatross design George Reich really turns Winter 80-In semi-cabin design competitive pylon ships Toms model first Dennymite engine now has ignition Super Cyclone piece wood carefully selected holes cut ribs forextra lightness plus lightweight silk covering clear dope finish keeps wing loading 8 oz per sq ft FF 10 RCI Has thick high-lift wing high thrust line shock gearprecisely like original old guy like Tom managed 465 project survivor Alamo Tom founder Detroit RC Club 29 years ago origi nators Toledo RC Exposition also versatile enough have won second Michigan State Meet Lacy 10 M Peanut During 1980s Torns oldies have taken 39 high places Toms documentation time-trip book Tie string around finger. have luck Irish seeing legendary fliers make great flights Lew Mahieu Dooling 29 tiny Zeek Joe Konefes 44-min Bombshell Chicago Roy Nelder launching Moffett winner Copland Jim Cahill Wakefield-winning Clodhopper Wris ton Dague Carl Goldberg diamond Zipper Interceptor Sailplane Valkyrie Cumulus Gordon Light Lanzos Bomber RCs big Puss Moth flew like Mulvihill Kovel KG Bassett talring Eastern States So-Long Elgin Playboy timed Kordas mighty Wakefield flight Aldrich Nobler Yates Madman Palmer often Saftig Zilch 445-pm shoot-outs Speed Walker Goods Kasmirski Orion Bon ner Smog Hog ff1 sat down sky fell Weird So watched among others George Reich Albatross left lifetime impression least 30 years no seemed notice Ive looked plans times published designed 1940 Air Trails Reich two-time Wakefield team mem ber once winning fabled cup Dick Kordas brother-in-law another Cleveland band immortals still builds flies oldies SAM stuff Albatross discovered bang Pylon Free Flight models ruled iron hand good 20 yearsthey alone could handle high power witness modern Satellite Yet like Konefes Reich went cabin design George secret side profile gave high wing like pylon high thrust line made fly like postwar 1950-1960 high-thrust pylons could climb safely dead ahead bored holes sky combi nation Albatross ideal now super-stable loafing around RC assist Old-Timer bag Oddly has lifting-type tail CG one-third wing chord supposes Astro cobalt geared 40 16 cells would get high enough 12 min Electric McCoys book full surprises sort modeling family bible Only notebook gee er featuring Alba tross Xerox some art directors work Id guess alone makes unique page encased protective plastic begins simply pageeverything throughout neatly typedcalled Old-Timer RC Mod el tabulated vital specs flip side against black background old magazine clipped photo guys room 1939 Nats Reich Elgin Korda McCoy others Another page describes original Alabatross along color photo Reich 1982 Lanzo Bomber Thats followed entire construction feature 1941 Air Trails two pages entitled Model Virtually page includes some old clipping involved old-timers relevant models page about engine quote tells work good read Super Cyclone 60 gift old friend Harvey Thomasian Worster MA Harvey old-time engine man particularly famous customtuned K&B engines during late 1 950s early 1 960s Harvey has large collec tion old ignition engines Cy clone certainly beautiful Although Left Toms model very popularTaibi Powerhouse placed second 1983 MIchigan State Old-TimerContest models shown have won other places Right First place Toledo 1982 went Toms rendition Maurice Schoenbruns Gladiator Like other Schoenbruns classics distinguished ample area deep belly high thrust line long tall moment Another cabin model Left Another Lanzo design Record Breaker isa functional parasol nice lines shot Danny Sheelds Americas unofficial Old-Timer goodwill ambassador British events Right Berkeleys Buccaneeretili built great numbers Heres Tom rendition 19308 classic Thanks early RC efforts Joe Raspante design also authentic RC Old-Timer Joeswasa monstrous size May1986 23 Stinson SR-S Megow followed about cowl bumps Winter says did bigger 1934-35 Flying Aces built sizes up 45-in span Bell relates bittrickyto adjust poor glide after power ran out glide improved after wear tear patches previously-siickwing Winter launching Rearwin Speedster indoor Scale meet Bill Bell says Speedster notes cheated Rubber first new models 1980 Once kitted Peerless 24-in-span design Scale designs generous tail area insomewhat beefed up still good flier indoors out Bell photos Tom Schmitt creases Made em fly much better says Left Pleet Trainer another Peerless two profile pilots impressive radial engine nose plug being readied winding stooge second Bell project required dihedral top wing good flight fuil-scale ship nonewhich would fine RC Right Caimly Bell gets off perfect two-hand launch dainty bipe Model has flying wires although cant seen plc its looks may fool new engine well broken-in pleasantly surprised find will turn 8500 rpm 14-4 Tis small world Harvey buddy Hal deBolts roughly 30 years ago published Live Wire-type plane Harvey trike gear Just lately during -scale Vagabond project supplied photos full-scale red-and-white Vag Just today same photos much other documentation sent HA Thomas similar project friend Hartsfield Little Rock Thomas McCoys book turns Propeller Tom says flatly present-day props unsuitable old ignition engines simi larly can tell traditional props best four-stroke engines no 3-in pitches FF useful prop case TF 11-4 has wrong blade shape lower ignition rpms Tom tells us may have heard low-wing Spartan did know also cabin version Bells third project once Comet kit Bill says its often mistaken fora Stinson Note ring cowl circa 1930 struts Neat two-hand launch Bill uses smooth fluid 24 Model Aviation Left Flying through skies Ninjing China Joe Tschirgis Short Stik tailless shortened Giant Stik currently powered 2500cc Supertigre Waibo pumpercarb No trick airfoil elevons widened Does nice wingovers buttall makes crosswind taxiing pain Text detalis Tachirgis expianation symmetrical wing standard zero-zero conventional piane may appearto fly level trim kind Refer diagram below follow discussion Right Can beileve Its Joe Tschirgl Stik its derived Bill Evans tailless technoiogy Older CL Combat fliers may remember Nobody design almost identical approach book has stuff reworking props Lost Ark data coming 1940 Air Age Annual Air Age corporate name MANs publisherbut doubt MAN annual 1940 whereas Air Trails did Thomas article certainly needs republishing Replete wonderful draw ings about methods obtaining truepitch prop includes blade top side profiles 14-8 probably would make Enya 60 four-stroke run like blue blazes Suffice say McCoy constantly pressured great props various hands have impres sive win record INVERTED TRIM PITCHING MOMENT ABLE REGION ANGLE OF ATrACK 4- FROM ZERO LIFT UPRIGHT TRIM POINT s new modeis foiiowed Taylor Cub Peerless Cessna C34 neither shown 24-in Taylor best lot though beefed up Beli states almost lost number times Above Aftera Fokker 0-Vil Scientific made tight turns fine glide good fiying indoors Bill built very beautifui Douglas Vi 0-43 Comet shown two views iost powerfui thermai 1984 now has repiacementversion forflying indoors Below Nicelydetailed resplendent Navy colors Beils F4B-4 American Modeicraft big use indoors waiting forgood outdoorweather Pianetakes six strands Ia-in rubber one-third Toms book states following section presen tation personal about mod els Thats beyond reporting talents Color pictures galore red blue yellow win ribbons Reports various major SAM meets can select some photos Toms models run descriptive captions ways fly alas horde newcomers may never discover before run course Bud Davisson gifted pilot word-maker does the Cockpit series MAN talked Command Air cover January 1986 MAN put extremely well urged Giant Scalers Continued page 26 May198625 Winning Ideas FOURMOST RETRACTABLE iTOWHOOKRELEASE Price 8690 V y4 F Simplest reliable device available After line released hook retracts body unit leaving SMOOTH surface bottom aircraft No special attachments required N eight Y2 oz OTHER FOURMOST PRODUCTS 0491051 AIRFLO ENGINE MOUNT 40 AIRFLO ENGINE MOUNT IDEAL FOR GUICKY 500 PRICE $630 REDUCES DRAG VIBRATION FREE PRICE $300 Fuel Fitting Sets Fuel Shut Off Fuel Manifold Gaplese Hinges Gapless Hinge Slotter Strut Fairings Codcpit Coaming nd SASE Complete Information 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 NEW GLASS FILLED MOTOR MOUNTS 0405 1011 1519 2025 3035 4045 40451 5050 5070 195 225 235 245 265 275 300 325 325 OEM BULK INQUIRES INVITED Featuring LONG GLASS FILLED NYLON FOR STRENGTH AND STABILITY Alignment Lines Mounting Interchangeable Kraft Flat bottom nose gear SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 AREA CODE 513 738-1576 put Technopower radial stand out bipe dont let see giving airplane Warp 9 performance said Let float along Let poke slowly can retrieve running under grabbing Let change pace Bud may have gotten bit carried away indelible experi ence nearly 50 years ago 30-in rubber-powered SE-S Joe Ott design Bud added Youll guy field can zig should have zagged push should have pulled will have airplane gives him plenty time correct mistakes Itll model because does 1/1 scale Two worlds Fly power Fly wing both prithee Bud could speaking old-timers things fly wing goes far beyond old-timers Years ago people tired the wall-to-wall Pattern-type thing escaped RC Sailplanes must have noticed years heavy advertising popularity Flying wing antique fetish What airplane during its aerobatic routine wonderfully fulfilling letting air plane itself almost sheer beauty flight equally fulfilling gotta have power Sailplane has except gravity Zero displacement maybe should keep scrapbooks rainy days doesnt rain gentleman Dihedral Ave address omen never saw Bill Bell come-backer So thousands born-again readers special case course chose specialized beautiful Tom McCoys brilliant pursuit Old-Timers ap preciate Rubber Scaleas us whether fly themBills efforts merit resounding well done As kid during Thirties Bill built Scale models 10- 25- 50-cent kits Megow Comet etc did vast multitude 1980 interest stick-and-tissue birds rekindled discovery Golden Age Reproductions new kit models put out Joe Fitz gibbons Tom Schmitt takes memo rable pictures wanders provides delightful prints make report possible Suppose group few Bill Bells Rubber Scale ships captions does other things too bumped him once flying dream Stearman biplane Flyline Models kit engine lo behold other models old designs case AMA Museum highlights some misdeeds written Bill finishing Albatros D-5 garish streamlined fighting machines WW D-5 some reason makes stupendous flier view pictures way Scale guys will dreaming manner RC things including Giant Continued page 28 26 Model Aviation FCYANOACRYLATE List Sale Savings 1 oz Fast Cure 3-5 Sec 495 $2 500/0 Off 2 oz Fast Cure 3-5 Sec895$396560/0 Off 1 oz Gap-Filling 5 Sec495 $2 50% Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave San Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 408 251-0789 Out StateINFO 408 251-0787 California Hours Mon-Wed Fri & Sat 930-530 Thur 930-900 1200-500 Pronto Retail $3995 Super Pronto Retail $4995 HIGH QUALITY 48 SPAN KIT FOR 09 TO 25 ENGINES FEATURES low wing design high wing stability excellent inverted performance Gentle novice Expert versatile performance 4-6 hour rapid-fire assembly beginner Precision machine-cut SIG balsa plywood spruce Rolled full size plans showing complete wing Step-by-step instructions easy assembly Formed main landing gear Exceptional small field performance May flown ito 3 channels Tested recommended approved b RIO Modeler Magazine Model aviation July 84 Virginia residents add 40/o sales tax Playmate ready now 5 15 pan 50 2 4 cycle TIDEWATER HOBBY ENTERPRISES Route 1 Box 2410 Lanexa Virginia 23089 Lftj9i Phone 804 966-5092 Scale course Rubber Scale guys will go ga-ga little traveling music please . Nanjing China Warning rock slides ahead Set stage cast characters bit background like strange airplanes anybodys impossible novel ties Since violate no aerodynamic law notions airplanes must fly has narrowly rigid Among us little knowledge can dangerous thing Maybe its good challenge traditions live Virginia Im Missouri am open-minded least dozen things including cockeyed dihedral explanations Im far out flexible Ive never seen genuine proof synimetrical-airfoiled wing zero-zero setup cant maintain level flight being trimmed ele vated up down does see strange things however elemental truth am necessarily stupid Okay engineers know some lift must developed situations agree shakily disagree Now time-out introduce Joe Tschir gi writes hotel room opposite side globe Joe respected old-timer fa mous strange airplanes ortho dox Scale models beautiful fliers apt strange Some may re member things like German WW Brandenberg biplane flying boats really strange Scale bird its prop located aft wings conventional fuselage Play mechanics once member own club NVRC prior coming Virginia years ago involved pro fessionally drones stuff knows subject description out-of-control RC model reed Rookie December issue caught eye Joe begins some years Ive trying finish series articles stability control mod els Its natural endeavor since before retiring 18 months ago fooled people believing knew something about sub ject 35 years Anyway question good Pattern models need little no down trim level inverted flight has always bothered Since wife decided masquerade English teachers Nanjing Ive time think about problem believe now have answer Authors Note excellent technical discussions received column one-on-one basis because references mysterious things ob served fun theme best served avoiding esoteric deep stuff example pile brilliant papers pro con relating air ocean debate fills series large manila envelopes Some letters exceed length column making exception Joe Tschirgi hoped reader will drop out Continued page 139 28 Model Aviation DAVE ROBELENS PRONTO AAJfl IIPPR PRAAITA per oreer FAST SERVICE COD ADD $190 Letters Editor Continued page 12 Thus weve filed criminal complaint charges against guy shooting down airplanes flying through sky Its lengthy battle prosecute sin come down home stretch hope will win Now before leave office have recommendation state Lets finish up court case forget about hate Weve lived through three years prob lems some us its rough Lets get sport model avi ation weve suffered long enough Mike Barklow Appleton WI accompanying letter Mike said foregoing poem written 1983 stepping down president Valley Aero Modelers clubs newsletter notpri nted due suit progress Despite best efforts club lost flying field doldrums briefperiod maintaining positive attitude group able establish new flying site rebuild itself now bigger better ever very gratying to organization Mike notes Safety/Preston Continued page 20 about accident members havent heard heres story heard few weeks ago member friend out flying weather fairly cold member standing wing tip friends plane friend attempting start using standard electric starter plastic engagement cone Somehow engine started friend surprised starter slipped off spinner hit ground trigger still depressed strn spin ning plastic cone exploded sending fragments directions friend got small piece through part ear sliver hit member corner eye caine out again doctor says 50% chance will lose eye may have have cornea transplant incident tragic enough itself stop think what could have happened occurred field person hurt innocent bystander kid Weve got keep spectators children out pit area Friends not. comment incident repeat something Ive said several times previously consider pair safety glass es starting model working shop Have safe month John Preston 12235 Tildenwood Dr Rockville MD 20852 Plane Talk/Winter Continued page 28 things become bit sticky Some will understand presentation its entirety am fortunates can interpret comments virtue simple diagram no math Will prescription fly Ponder photo giant tailless Ugly Stik involves no trick airfoils Follow Joe end youll find other comments play Let assume perfectly symmetric aircraft argument Tschirgi warms up has symmetric airfoils both wing tail thrust line wing tail CG centerline has zero-zero incidence setup also assume fore-and-aft CG position such model trim level flight Since model perfectly symmetric pitch plane its obvious model will also fly straight level verted assumptions solu tion clear leaves another problem can such model trim angle attack except zero tricky part model symmetric angle attack airflow over Behind wing generating lift have downwash evidence vorticity shed wing Its strength centerline strong function aspect ratio normal model configurations downwash small function angle attack concentrated directly down stream model changes angle attack tail sweeps through region Generally results pitching moment curves nonlinear have reduced static stability near zero lift sym metric model assumed stabil izer center downwash field However CG far enough aft static stability can zero unstable region exhibiting positive static margins outside unstable point maximum downwash effect model will have two trim points symmetric model postulated would equal opposite sign lift coefficients best visualized referring illustration fact dynamic pressure re duced wings wake Joe goes also contributes non-linearity course reversal cannot exist unless static stability quite small tail out wakeie CG well aft brings up another interesting point models easy fly some cases easiest have little static Continued page 142 May1986 139 n ou sy SEE- HFE THE BOTTLE OF ZRPJET LEPKED FiND sNIcKE YOU TRIED TO SCRPTCH YOUR GIGGLEEP / 0 ZIin ZSOL 92 span 19-21 lbs $20995 Piper PA-17 Vagabond 84 span 10 lbs $15995 Super P11 92 span 19-21 lbs $18995 Chipahip 90 80 span 1/5 scale $12995 TalIwbeel Assemblies 3-8 lbs$1095 4-9 lbs$1295 10-l8lbs$1495 lOibsaup$1595 Manufacturers Softglass Fast Tape Fast Threads 1/4 Scale Pilots Plans construction models three large sheets eli parts shown full scale Weighs down construction bales plywood Models available F 84-F Thunderetreak Sabre F 100 Super Saber Fighting Falcon Eagle Mirage 2000 21 Fishbed i Blackbird F 104 Scarf ighter Fit types ducted fan units wheel 5 dia 40 80 engines Available also motor ducted fan unit sod canopy Price plan 5000 US dollars includes shipment air mail rolled tube Write free literature InformatIon G Bertella Via Matteotti 248 Gardone VT 25063 Brescia Italy 1981 World Soaring Champ DWIGHT HOLLEY FEATURES Sailplanes lous Electric Planes AS1IOFLIOHT e UNGE e 11113 MOICIS IN STOCK SANYO SANYO SANYOBattery Special NSOOAR Weigh 36 Grams Cut Oficells NEW Lower Price Red Jacket Cut Off cells N1200SCR Weigh 52 Grams $340 1200MAH Now 2 New Super Cells Sanyo N-900SC SCR Cut Off cells $375 Both weigh 39 Grams 3/4 length 1200s same dia N900SC will deliver least 950 MAH N900 SCR will deliver great amperage quickly oELECTRIC MODEL SAILPLANE SPECIALISTSHOLLEYS SILENT FLIGHT FEATURING ONLY STATE OF THE ART ITEMS 03 748-0083 LUCALL OR WRITE FOR FREE DESCRIPTIVE FLYER 151 CHESTNUT RIDGE RD BETHEL CT 06501 U MS SPEED CONTROLLERS e GRAUPNERe ASTROFLIGHT KELLER UNGER Plane Talk/Winter Continued page 139 stabilityat Static margins percent chord would dangerous full-scale aircraft Conventional models have dynam ic stability far excess full-scale aircraft because very low density fact believe modelsparticularly Pat tern RC duration power modelsare dead-beat fundamental pitch modes allows marginally-stable stat ically RC model easily flown Fur ther low static stability high dynamic stability required model going groove same qualities needed Free Flight models handle high powerbut another long story As might have gathered Im con vinced dynamic stability damping important primary factor suc cessful model design primary factor both pitch stability control both RC FF Power also major requirement spiral stability Free Flight models discussion has simplified assuming symmetric model same two-trim-point pitching moment curve possible asym metric model including cambered wing fact inclusion cambered wing may make easier achieve However explanation much involved since cambered airfoils pitching moment necessary ingredient two-static-trim-point mo ment curve certainly flyableI believe have done itI doubt total cause unusual incident Tschirgi continues believe Janomo lie would noticed corrected example bit down elevation fed level flight model would shift negative trim point stay trimmed elevator neu tralized CG assumed moment curve shifted bit forward un stable region would become flat very slightly stable double trim point would vanish very slight amount down elevator trim would make second trim point reappear believe typical condition RC model 0 0 0 0 Ce 0 2 0 Ce Ce m -l 0 2 Cit C F F grooves well remember reed servos fairly wide deadband neutral because use slide switch contacts Hence think model grooved well servo stopped downside deadband Au Eureka finally know Only once before has anyone offered respectful comment observation zero-zero symmetrical wing sometimes gives impression model can remain straight level control input observation flies face truth wing must generate lift hold such attitude Years ago asked Joe Wagner thought such setup could maintain straight level possible Joe replied sym metrical wing changing its angie attack between positive negative over small range trim its doing visible eye wonder now about Wagners ooncept invisible chang ing trim exists necessarily has two limitspositive negative note Tschirgis diagram need understand two trim points calls out shown intersections line labeled Angle Attack Zero Lift say wonder strange out-of-control flight Rookie occurred 1962 Control lost plane inverted overhead low altitude up-trim rolled inverted obviously no downtrim oould inputted inverted since control gone plane circled entire area maintaining constant altitude eventually arriving low overhead original headingat point control regained quick landing plane symmetrical Yo-/3 semi-symmetrical airfoil some angu lar difference some dihedral high thrust line design factors oom bined especially high thrust line low thrust line inverted help maintain impossible level flight probably could servo stopped side neutral Tschirgi said would impart unknowing slight down elevator trim dont forget Tschirgis analysis shows truly142 Model Aviation Ohio 11376 Ridgeway Rd Kensington OH 44427 216223-1950 1 Full Size Plans Ducied Fans 1 J C Trainers_ Wing 60 Size40 SemhSyme Size20 Size See local dealer call us location dealer nearest symmetrical model also could maintain straight level flight under same conditions eye old Rookie generating liftwhen fact lift present law states due strange confluence conditions aerodynamics beyond ken modelers Highly interesting fact modffied Rookie comes close will duplicate inverted phenomenon much heavier balanced one-third chord whereas original lighter CG 40% chord will have noted Joe Tschirgis references balance points balance 40% what new Rcokie surprises people fly its ability go inverted slightest urging remain inverted ease long periods steering such inverted Figure 8s additionally implies non-symmetrical craft kind disposition surfaces thrust line etc could fine-tuned maximize desired end product series de velopment Bats belfry know whats So whats Purple Plan mail brings mention some guys Purple Plan repairs finishing dusty frameworks hanging think AMA should have Purple Plan badge could wear proudlyor pin rear buddy cant get acttogether now alas probably 50% remember did see column year ago Purple Plan important tote keeps up well have rerun item Ive now applied flying keep saying Wait till next year next year field muddy early spring winds blow gets tco hot gets windy again too cold Once snow sleet fog no excuses October sometimes late September November later golden days Like Ba hamas wind III can get two perfect October days makes up year worthwhile make another plane two over months via Purple Plan flying career goes FLYS GREAT IDEAL BEGINNERS AIRPLANE THAT BUILDS IN HALF THE TIME Jig built balsa fuselage 90% Built wing Excellent instructions first time builder Full size plans Decal forms windshield JOHNNIE CASBURN MANUFACTURING CO 5115-SE E Rosedale Fort Worth TX 76112 Day 817/451-7537 t 817/572-1452 always another golden October modified Rookie Enya fourstroke 60 sat unpainted nearly year flies beautifully thrust torque its 14-6 8300-8500 awesome especi ally pulling through tight slowed up close-in aerobatics wont fly helper reminds crewing Giant Scale Aristocrat 18-6 prop 7000 rpm need two-hand hold remote glow plug battery connection must things would simpler years Ive requests plans Rosenstock see ads has plans early-1960s version youll able get plans new Model Builder before too long bought first kit cant believe Midways Dennyplane want build think aluminum-cowled round OldTimer has dream too years wood cutting first rate plans something else old-timer old-fashioned plan always some mistake few details doesnt matter since need lines pin down spars longerons etc plan certainly authentic mid-30s box has original Dennyplane labels picture Denny himselfwith goggles Typical day theres block listing guys drew traced whatever signed off including ol Reggie himself some other modem names No cross sections no rib patterns outline side view. s way Im delighted know fineflying ancient model actually looks like airplane took plunge because showed pictures Dennyplanes got me. may go first Sigs new Kaydet Senior big bird trainer bigger Eagle three channels lots openframe stuff fuselage once flew planes like 19s rudder-only control almost no elevatorsnot throttle have aileron jobs already know can enjoy floating around like bird soaring heavens isnt very windy Designer Claude McCullough has going back silk dope can Continued page 147 May1986143 CD CD 0 z 0 z 0 C/ 0 -u 0 -u m m 0 Q H CD n 0 0 C/ 0 C, 0 0 31 0 ThJ Lr N CD C, N x x x x x 01 x x x U Available NowThe New Breed Sachs/DolmarLightst weight hand start ready-to-mount engines market 31 $27500 34- $34500 37 $35500 42- $37500 Engines Complete Nothing Extra Buy Choice points 1SIba2z-SYaHP34-5Ibsftoz-65P37-SIhs4oz-CtaHP42-5Vjs3oi-7MP CDI IgnitionOption engines Throttle-coupled spark advance Features CustomIz newest German engines parts ler t ting Bolts sure Tap smoke Carburetor Linkage Ignition ICH Eiectronicsl Ignition Peck ty Switch lt Hub stor Spk Pigs Warranty Fauity Parts Workmanship T G Mfg 857 High Mountain Rd North Haiedon NJ 07508 e 201 427-3845 Plane Talk/Winter Continued page 143 enjoy does will use spoilers see article February issue plan new wrinkle hate install ailerons tape Bill Evans now AMA Museumcompany demo Slow Motion Electric Astro 25 14 cells 12 Ah capacity conned Bill roaring success direct driveaerobatics plus soaring over hour high-speed inverted flybys got five-year-old kid fly attention wanderedyou could see him watching other airplanes Yet Slow Motion sailing wide circles wide open piped 60 Desperado Evans hates stabilizers Des perado published April 1984 issue magazine has cathedral huge towering tail Stable rock course does what consider fearful high-speed aerobatics film paused ask wanted 60-powered Desperado subscribe old-fashioned explanation dihedral works plane could fly would nearly unflyable tractable Slow Motion published MA Ive told Bill could spec version match SloMo fine now has picture Dasher 60and like am willing tackle 60 Dasher max 40 power What am saying Actually Id feel good hot 25but am double-dared 74 tape showed Giant Scale CAPso pretty Look close gosh no stabilizer flights tape better what can stab Its called T-CAP slowed-up tendencies CAP stall vanished stab Slow slow fly bys tips quivering Yes hot Tschirgis crazy giant tailless Stik wonders bother making boring tail surfaces Airfoils CG locations make possible things see Thank Lord Purple Plan golden Octobers Bill Winter 4432 Altura Ct Fairfax VA 22030 Can talk ask pictures returned accompanying envelope obviously cannot use wonderful things Dont have negatives making prints ones send wont priceless Others would like see please include stamped pre-addressed envelopes least stamp Try use influence postman wont ask excess postage responding advertIsers mentIon read aboutthem ModelAviation Radio Technique/Myers Continued page 43 utor Salt Lake City area fourchannel two-stick 75 MHz radios stock time said Go ahead wont make difference also talked established hobby shop owner nearby village told RC airplanes dont sell around cant keep enough off-road RC cars stock first radio went back distributor its easy see retailers arent bad guys situation hope see suggested Bob Aberle back 1982 fre quencies divided mentioned again column June 85 discussed AMA Frequency Committee meeting November 85 reiterated John Prestons column April 86 issue wit Weve got get manufac turers permanently mark 75MHz radios use aircraft 72 MHz radios Aircraft Only right factory markings arent permanent arent put factory wont have effect probably wont happen until 1988 shared channels go away think ought put some effort making happen Ive really buried letters Please Introducing. irekIIn RIC Idle-Bar Glow Plugs Long Short Also.Only $169 Traditional line non-idle bar Glow Plugs a Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $129 Swanson Associates PO Box 151 Wayne NJS948 07470 m Custom Built Models 2036 N Thorn Ave Fresco CA 93704 em 6 pmOrder Phone 209 233-1050ask Bill If you LOVE fly HATE build Contact e solution probleml Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc - IF1yWhatIBuu1d May1986 147 lie Koush Laser Kit TG Reg $24995 hardware -$27995 SYNTHETIC LUBRICANTS CASTOR LUBRICANTS POWER ADDITIVES FREE CATALOG INcODUCT INFOTIPS UDES~ 800-242-0489 777 j3#7 Pt Box 11343 154tt57 219-749-1489
Edition: Model Aviation - 1986/05
Page Numbers: 22, 23, 24, 25, 26, 28, 139, 142, 143, 147
Bill Winter 0 Plane Talk THEY SAY can tell man books tell fellows largely kinds models build fly Before column sets sail three-yearjourney search Great White Whale owe landmark Resisting impulse explore Mice-in-Wonderland science preparing competition Scale documentation cal culated science thought-controlling judges show em everything show em nuttin known documentation done its own sake can become book book about Albatrossthe double S tells about Scale Albatros 5 WW German fighter Things such grow like ivy Lets begin Tom McCoy picture Lanzos RC-l radio job 1934 appeared column three months ago Aware McCoy old buddy Chet Lanzo asked both photos background resulted threeview Chets exciting photos presented two months back During 1980 bull session Chet men tioned drawing plans forgotten wun derkind remark went over Toms head until saw Chet fly pretty bird SAM Champs Westover AFB 1982 supposes knew what looking subsequent meet Cleveland Tom realized earliest-ever RC jobs Chet gave him plans romance RC-l began happened Toms photos RC-l arrived docu mentation book Albatross did color shots stable superbly-built OldTimers Antiques exquisite Tom demon competitior well 1984 alone compressed-air King Burd took first SAM Champs RC-1 won another Michigan State Champs DRCC OldTimer still another RC Old-Timer Detroit Expo second OldTimer Toledo Lanzo Bomber OldTimer won first MRCA Show second Detroit RC contest third New York State Championships Building 38 years Tom joined AMA Detroit Balsa Bugs 12 1952 Junior AMA Champion winning Cooper Brothers Trophy Indoor Rubber 19 flew first RC Berkeley Cavalier Citizen ship 465 equipment Having published first license free RC plans ever MAN 40s using pre-production sample radio can attest 19-yearLeft Tom McCoy Lanzo Bomber RC first 1983 Toledo Show Tom favors natural yellow silk variations trademark color schemes consisting blue black trim often white striping set things off Above Compressed air King Burd atthe 1982 MichIgan State Meet boxy Robin-like modeiwon boththeSAM Champsand MiniChamps Ribs narrowtips wing tail holed forlightness Winterwonders abouta 1 0-1 5 gasfor oran electric motorforhigh-time duration over 40 wins golden oldies mostly firsts seconds Tom McCoys virtual museum pieces show little no sign strenuous competitions show seven examples selected Toms scrapbook really much like Scale documentation book Leading off Albatross design George Reich really turns Winter 80-In semi-cabin design competitive pylon ships Toms model first Dennymite engine now has ignition Super Cyclone piece wood carefully selected holes cut ribs forextra lightness plus lightweight silk covering clear dope finish keeps wing loading 8 oz per sq ft FF 10 RCI Has thick high-lift wing high thrust line shock gearprecisely like original old guy like Tom managed 465 project survivor Alamo Tom founder Detroit RC Club 29 years ago origi nators Toledo RC Exposition also versatile enough have won second Michigan State Meet Lacy 10 M Peanut During 1980s Torns oldies have taken 39 high places Toms documentation time-trip book Tie string around finger. have luck Irish seeing legendary fliers make great flights Lew Mahieu Dooling 29 tiny Zeek Joe Konefes 44-min Bombshell Chicago Roy Nelder launching Moffett winner Copland Jim Cahill Wakefield-winning Clodhopper Wris ton Dague Carl Goldberg diamond Zipper Interceptor Sailplane Valkyrie Cumulus Gordon Light Lanzos Bomber RCs big Puss Moth flew like Mulvihill Kovel KG Bassett talring Eastern States So-Long Elgin Playboy timed Kordas mighty Wakefield flight Aldrich Nobler Yates Madman Palmer often Saftig Zilch 445-pm shoot-outs Speed Walker Goods Kasmirski Orion Bon ner Smog Hog ff1 sat down sky fell Weird So watched among others George Reich Albatross left lifetime impression least 30 years no seemed notice Ive looked plans times published designed 1940 Air Trails Reich two-time Wakefield team mem ber once winning fabled cup Dick Kordas brother-in-law another Cleveland band immortals still builds flies oldies SAM stuff Albatross discovered bang Pylon Free Flight models ruled iron hand good 20 yearsthey alone could handle high power witness modern Satellite Yet like Konefes Reich went cabin design George secret side profile gave high wing like pylon high thrust line made fly like postwar 1950-1960 high-thrust pylons could climb safely dead ahead bored holes sky combi nation Albatross ideal now super-stable loafing around RC assist Old-Timer bag Oddly has lifting-type tail CG one-third wing chord supposes Astro cobalt geared 40 16 cells would get high enough 12 min Electric McCoys book full surprises sort modeling family bible Only notebook gee er featuring Alba tross Xerox some art directors work Id guess alone makes unique page encased protective plastic begins simply pageeverything throughout neatly typedcalled Old-Timer RC Mod el tabulated vital specs flip side against black background old magazine clipped photo guys room 1939 Nats Reich Elgin Korda McCoy others Another page describes original Alabatross along color photo Reich 1982 Lanzo Bomber Thats followed entire construction feature 1941 Air Trails two pages entitled Model Virtually page includes some old clipping involved old-timers relevant models page about engine quote tells work good read Super Cyclone 60 gift old friend Harvey Thomasian Worster MA Harvey old-time engine man particularly famous customtuned K&B engines during late 1 950s early 1 960s Harvey has large collec tion old ignition engines Cy clone certainly beautiful Although Left Toms model very popularTaibi Powerhouse placed second 1983 MIchigan State Old-TimerContest models shown have won other places Right First place Toledo 1982 went Toms rendition Maurice Schoenbruns Gladiator Like other Schoenbruns classics distinguished ample area deep belly high thrust line long tall moment Another cabin model Left Another Lanzo design Record Breaker isa functional parasol nice lines shot Danny Sheelds Americas unofficial Old-Timer goodwill ambassador British events Right Berkeleys Buccaneeretili built great numbers Heres Tom rendition 19308 classic Thanks early RC efforts Joe Raspante design also authentic RC Old-Timer Joeswasa monstrous size May1986 23 Stinson SR-S Megow followed about cowl bumps Winter says did bigger 1934-35 Flying Aces built sizes up 45-in span Bell relates bittrickyto adjust poor glide after power ran out glide improved after wear tear patches previously-siickwing Winter launching Rearwin Speedster indoor Scale meet Bill Bell says Speedster notes cheated Rubber first new models 1980 Once kitted Peerless 24-in-span design Scale designs generous tail area insomewhat beefed up still good flier indoors out Bell photos Tom Schmitt creases Made em fly much better says Left Pleet Trainer another Peerless two profile pilots impressive radial engine nose plug being readied winding stooge second Bell project required dihedral top wing good flight fuil-scale ship nonewhich would fine RC Right Caimly Bell gets off perfect two-hand launch dainty bipe Model has flying wires although cant seen plc its looks may fool new engine well broken-in pleasantly surprised find will turn 8500 rpm 14-4 Tis small world Harvey buddy Hal deBolts roughly 30 years ago published Live Wire-type plane Harvey trike gear Just lately during -scale Vagabond project supplied photos full-scale red-and-white Vag Just today same photos much other documentation sent HA Thomas similar project friend Hartsfield Little Rock Thomas McCoys book turns Propeller Tom says flatly present-day props unsuitable old ignition engines simi larly can tell traditional props best four-stroke engines no 3-in pitches FF useful prop case TF 11-4 has wrong blade shape lower ignition rpms Tom tells us may have heard low-wing Spartan did know also cabin version Bells third project once Comet kit Bill says its often mistaken fora Stinson Note ring cowl circa 1930 struts Neat two-hand launch Bill uses smooth fluid 24 Model Aviation Left Flying through skies Ninjing China Joe Tschirgis Short Stik tailless shortened Giant Stik currently powered 2500cc Supertigre Waibo pumpercarb No trick airfoil elevons widened Does nice wingovers buttall makes crosswind taxiing pain Text detalis Tachirgis expianation symmetrical wing standard zero-zero conventional piane may appearto fly level trim kind Refer diagram below follow discussion Right Can beileve Its Joe Tschirgl Stik its derived Bill Evans tailless technoiogy Older CL Combat fliers may remember Nobody design almost identical approach book has stuff reworking props Lost Ark data coming 1940 Air Age Annual Air Age corporate name MANs publisherbut doubt MAN annual 1940 whereas Air Trails did Thomas article certainly needs republishing Replete wonderful draw ings about methods obtaining truepitch prop includes blade top side profiles 14-8 probably would make Enya 60 four-stroke run like blue blazes Suffice say McCoy constantly pressured great props various hands have impres sive win record INVERTED TRIM PITCHING MOMENT ABLE REGION ANGLE OF ATrACK 4- FROM ZERO LIFT UPRIGHT TRIM POINT s new modeis foiiowed Taylor Cub Peerless Cessna C34 neither shown 24-in Taylor best lot though beefed up Beli states almost lost number times Above Aftera Fokker 0-Vil Scientific made tight turns fine glide good fiying indoors Bill built very beautifui Douglas Vi 0-43 Comet shown two views iost powerfui thermai 1984 now has repiacementversion forflying indoors Below Nicelydetailed resplendent Navy colors Beils F4B-4 American Modeicraft big use indoors waiting forgood outdoorweather Pianetakes six strands Ia-in rubber one-third Toms book states following section presen tation personal about mod els Thats beyond reporting talents Color pictures galore red blue yellow win ribbons Reports various major SAM meets can select some photos Toms models run descriptive captions ways fly alas horde newcomers may never discover before run course Bud Davisson gifted pilot word-maker does the Cockpit series MAN talked Command Air cover January 1986 MAN put extremely well urged Giant Scalers Continued page 26 May198625 Winning Ideas FOURMOST RETRACTABLE iTOWHOOKRELEASE Price 8690 V y4 F Simplest reliable device available After line released hook retracts body unit leaving SMOOTH surface bottom aircraft No special attachments required N eight Y2 oz OTHER FOURMOST PRODUCTS 0491051 AIRFLO ENGINE MOUNT 40 AIRFLO ENGINE MOUNT IDEAL FOR GUICKY 500 PRICE $630 REDUCES DRAG VIBRATION FREE PRICE $300 Fuel Fitting Sets Fuel Shut Off Fuel Manifold Gaplese Hinges Gapless Hinge Slotter Strut Fairings Codcpit Coaming nd SASE Complete Information 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 NEW GLASS FILLED MOTOR MOUNTS 0405 1011 1519 2025 3035 4045 40451 5050 5070 195 225 235 245 265 275 300 325 325 OEM BULK INQUIRES INVITED Featuring LONG GLASS FILLED NYLON FOR STRENGTH AND STABILITY Alignment Lines Mounting Interchangeable Kraft Flat bottom nose gear SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 AREA CODE 513 738-1576 put Technopower radial stand out bipe dont let see giving airplane Warp 9 performance said Let float along Let poke slowly can retrieve running under grabbing Let change pace Bud may have gotten bit carried away indelible experi ence nearly 50 years ago 30-in rubber-powered SE-S Joe Ott design Bud added Youll guy field can zig should have zagged push should have pulled will have airplane gives him plenty time correct mistakes Itll model because does 1/1 scale Two worlds Fly power Fly wing both prithee Bud could speaking old-timers things fly wing goes far beyond old-timers Years ago people tired the wall-to-wall Pattern-type thing escaped RC Sailplanes must have noticed years heavy advertising popularity Flying wing antique fetish What airplane during its aerobatic routine wonderfully fulfilling letting air plane itself almost sheer beauty flight equally fulfilling gotta have power Sailplane has except gravity Zero displacement maybe should keep scrapbooks rainy days doesnt rain gentleman Dihedral Ave address omen never saw Bill Bell come-backer So thousands born-again readers special case course chose specialized beautiful Tom McCoys brilliant pursuit Old-Timers ap preciate Rubber Scaleas us whether fly themBills efforts merit resounding well done As kid during Thirties Bill built Scale models 10- 25- 50-cent kits Megow Comet etc did vast multitude 1980 interest stick-and-tissue birds rekindled discovery Golden Age Reproductions new kit models put out Joe Fitz gibbons Tom Schmitt takes memo rable pictures wanders provides delightful prints make report possible Suppose group few Bill Bells Rubber Scale ships captions does other things too bumped him once flying dream Stearman biplane Flyline Models kit engine lo behold other models old designs case AMA Museum highlights some misdeeds written Bill finishing Albatros D-5 garish streamlined fighting machines WW D-5 some reason makes stupendous flier view pictures way Scale guys will dreaming manner RC things including Giant Continued page 28 26 Model Aviation FCYANOACRYLATE List Sale Savings 1 oz Fast Cure 3-5 Sec 495 $2 500/0 Off 2 oz Fast Cure 3-5 Sec895$396560/0 Off 1 oz Gap-Filling 5 Sec495 $2 50% Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave San Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 408 251-0789 Out StateINFO 408 251-0787 California Hours Mon-Wed Fri & Sat 930-530 Thur 930-900 1200-500 Pronto Retail $3995 Super Pronto Retail $4995 HIGH QUALITY 48 SPAN KIT FOR 09 TO 25 ENGINES FEATURES low wing design high wing stability excellent inverted performance Gentle novice Expert versatile performance 4-6 hour rapid-fire assembly beginner Precision machine-cut SIG balsa plywood spruce Rolled full size plans showing complete wing Step-by-step instructions easy assembly Formed main landing gear Exceptional small field performance May flown ito 3 channels Tested recommended approved b RIO Modeler Magazine Model aviation July 84 Virginia residents add 40/o sales tax Playmate ready now 5 15 pan 50 2 4 cycle TIDEWATER HOBBY ENTERPRISES Route 1 Box 2410 Lanexa Virginia 23089 Lftj9i Phone 804 966-5092 Scale course Rubber Scale guys will go ga-ga little traveling music please . Nanjing China Warning rock slides ahead Set stage cast characters bit background like strange airplanes anybodys impossible novel ties Since violate no aerodynamic law notions airplanes must fly has narrowly rigid Among us little knowledge can dangerous thing Maybe its good challenge traditions live Virginia Im Missouri am open-minded least dozen things including cockeyed dihedral explanations Im far out flexible Ive never seen genuine proof synimetrical-airfoiled wing zero-zero setup cant maintain level flight being trimmed ele vated up down does see strange things however elemental truth am necessarily stupid Okay engineers know some lift must developed situations agree shakily disagree Now time-out introduce Joe Tschir gi writes hotel room opposite side globe Joe respected old-timer fa mous strange airplanes ortho dox Scale models beautiful fliers apt strange Some may re member things like German WW Brandenberg biplane flying boats really strange Scale bird its prop located aft wings conventional fuselage Play mechanics once member own club NVRC prior coming Virginia years ago involved pro fessionally drones stuff knows subject description out-of-control RC model reed Rookie December issue caught eye Joe begins some years Ive trying finish series articles stability control mod els Its natural endeavor since before retiring 18 months ago fooled people believing knew something about sub ject 35 years Anyway question good Pattern models need little no down trim level inverted flight has always bothered Since wife decided masquerade English teachers Nanjing Ive time think about problem believe now have answer Authors Note excellent technical discussions received column one-on-one basis because references mysterious things ob served fun theme best served avoiding esoteric deep stuff example pile brilliant papers pro con relating air ocean debate fills series large manila envelopes Some letters exceed length column making exception Joe Tschirgi hoped reader will drop out Continued page 139 28 Model Aviation DAVE ROBELENS PRONTO AAJfl IIPPR PRAAITA per oreer FAST SERVICE COD ADD $190 Letters Editor Continued page 12 Thus weve filed criminal complaint charges against guy shooting down airplanes flying through sky Its lengthy battle prosecute sin come down home stretch hope will win Now before leave office have recommendation state Lets finish up court case forget about hate Weve lived through three years prob lems some us its rough Lets get sport model avi ation weve suffered long enough Mike Barklow Appleton WI accompanying letter Mike said foregoing poem written 1983 stepping down president Valley Aero Modelers clubs newsletter notpri nted due suit progress Despite best efforts club lost flying field doldrums briefperiod maintaining positive attitude group able establish new flying site rebuild itself now bigger better ever very gratying to organization Mike notes Safety/Preston Continued page 20 about accident members havent heard heres story heard few weeks ago member friend out flying weather fairly cold member standing wing tip friends plane friend attempting start using standard electric starter plastic engagement cone Somehow engine started friend surprised starter slipped off spinner hit ground trigger still depressed strn spin ning plastic cone exploded sending fragments directions friend got small piece through part ear sliver hit member corner eye caine out again doctor says 50% chance will lose eye may have have cornea transplant incident tragic enough itself stop think what could have happened occurred field person hurt innocent bystander kid Weve got keep spectators children out pit area Friends not. comment incident repeat something Ive said several times previously consider pair safety glass es starting model working shop Have safe month John Preston 12235 Tildenwood Dr Rockville MD 20852 Plane Talk/Winter Continued page 28 things become bit sticky Some will understand presentation its entirety am fortunates can interpret comments virtue simple diagram no math Will prescription fly Ponder photo giant tailless Ugly Stik involves no trick airfoils Follow Joe end youll find other comments play Let assume perfectly symmetric aircraft argument Tschirgi warms up has symmetric airfoils both wing tail thrust line wing tail CG centerline has zero-zero incidence setup also assume fore-and-aft CG position such model trim level flight Since model perfectly symmetric pitch plane its obvious model will also fly straight level verted assumptions solu tion clear leaves another problem can such model trim angle attack except zero tricky part model symmetric angle attack airflow over Behind wing generating lift have downwash evidence vorticity shed wing Its strength centerline strong function aspect ratio normal model configurations downwash small function angle attack concentrated directly down stream model changes angle attack tail sweeps through region Generally results pitching moment curves nonlinear have reduced static stability near zero lift sym metric model assumed stabil izer center downwash field However CG far enough aft static stability can zero unstable region exhibiting positive static margins outside unstable point maximum downwash effect model will have two trim points symmetric model postulated would equal opposite sign lift coefficients best visualized referring illustration fact dynamic pressure re duced wings wake Joe goes also contributes non-linearity course reversal cannot exist unless static stability quite small tail out wakeie CG well aft brings up another interesting point models easy fly some cases easiest have little static Continued page 142 May1986 139 n ou sy SEE- HFE THE BOTTLE OF ZRPJET LEPKED FiND sNIcKE YOU TRIED TO SCRPTCH YOUR GIGGLEEP / 0 ZIin ZSOL 92 span 19-21 lbs $20995 Piper PA-17 Vagabond 84 span 10 lbs $15995 Super P11 92 span 19-21 lbs $18995 Chipahip 90 80 span 1/5 scale $12995 TalIwbeel Assemblies 3-8 lbs$1095 4-9 lbs$1295 10-l8lbs$1495 lOibsaup$1595 Manufacturers Softglass Fast Tape Fast Threads 1/4 Scale Pilots Plans construction models three large sheets eli parts shown full scale Weighs down construction bales plywood Models available F 84-F Thunderetreak Sabre F 100 Super Saber Fighting Falcon Eagle Mirage 2000 21 Fishbed i Blackbird F 104 Scarf ighter Fit types ducted fan units wheel 5 dia 40 80 engines Available also motor ducted fan unit sod canopy Price plan 5000 US dollars includes shipment air mail rolled tube Write free literature InformatIon G Bertella Via Matteotti 248 Gardone VT 25063 Brescia Italy 1981 World Soaring Champ DWIGHT HOLLEY FEATURES Sailplanes lous Electric Planes AS1IOFLIOHT e UNGE e 11113 MOICIS IN STOCK SANYO SANYO SANYOBattery Special NSOOAR Weigh 36 Grams Cut Oficells NEW Lower Price Red Jacket Cut Off cells N1200SCR Weigh 52 Grams $340 1200MAH Now 2 New Super Cells Sanyo N-900SC SCR Cut Off cells $375 Both weigh 39 Grams 3/4 length 1200s same dia N900SC will deliver least 950 MAH N900 SCR will deliver great amperage quickly oELECTRIC MODEL SAILPLANE SPECIALISTSHOLLEYS SILENT FLIGHT FEATURING ONLY STATE OF THE ART ITEMS 03 748-0083 LUCALL OR WRITE FOR FREE DESCRIPTIVE FLYER 151 CHESTNUT RIDGE RD BETHEL CT 06501 U MS SPEED CONTROLLERS e GRAUPNERe ASTROFLIGHT KELLER UNGER Plane Talk/Winter Continued page 139 stabilityat Static margins percent chord would dangerous full-scale aircraft Conventional models have dynam ic stability far excess full-scale aircraft because very low density fact believe modelsparticularly Pat tern RC duration power modelsare dead-beat fundamental pitch modes allows marginally-stable stat ically RC model easily flown Fur ther low static stability high dynamic stability required model going groove same qualities needed Free Flight models handle high powerbut another long story As might have gathered Im con vinced dynamic stability damping important primary factor suc cessful model design primary factor both pitch stability control both RC FF Power also major requirement spiral stability Free Flight models discussion has simplified assuming symmetric model same two-trim-point pitching moment curve possible asym metric model including cambered wing fact inclusion cambered wing may make easier achieve However explanation much involved since cambered airfoils pitching moment necessary ingredient two-static-trim-point mo ment curve certainly flyableI believe have done itI doubt total cause unusual incident Tschirgi continues believe Janomo lie would noticed corrected example bit down elevation fed level flight model would shift negative trim point stay trimmed elevator neu tralized CG assumed moment curve shifted bit forward un stable region would become flat very slightly stable double trim point would vanish very slight amount down elevator trim would make second trim point reappear believe typical condition RC model 0 0 0 0 Ce 0 2 0 Ce Ce m -l 0 2 Cit C F F grooves well remember reed servos fairly wide deadband neutral because use slide switch contacts Hence think model grooved well servo stopped downside deadband Au Eureka finally know Only once before has anyone offered respectful comment observation zero-zero symmetrical wing sometimes gives impression model can remain straight level control input observation flies face truth wing must generate lift hold such attitude Years ago asked Joe Wagner thought such setup could maintain straight level possible Joe replied sym metrical wing changing its angie attack between positive negative over small range trim its doing visible eye wonder now about Wagners ooncept invisible chang ing trim exists necessarily has two limitspositive negative note Tschirgis diagram need understand two trim points calls out shown intersections line labeled Angle Attack Zero Lift say wonder strange out-of-control flight Rookie occurred 1962 Control lost plane inverted overhead low altitude up-trim rolled inverted obviously no downtrim oould inputted inverted since control gone plane circled entire area maintaining constant altitude eventually arriving low overhead original headingat point control regained quick landing plane symmetrical Yo-/3 semi-symmetrical airfoil some angu lar difference some dihedral high thrust line design factors oom bined especially high thrust line low thrust line inverted help maintain impossible level flight probably could servo stopped side neutral Tschirgi said would impart unknowing slight down elevator trim dont forget Tschirgis analysis shows truly142 Model Aviation Ohio 11376 Ridgeway Rd Kensington OH 44427 216223-1950 1 Full Size Plans Ducied Fans 1 J C Trainers_ Wing 60 Size40 SemhSyme Size20 Size See local dealer call us location dealer nearest symmetrical model also could maintain straight level flight under same conditions eye old Rookie generating liftwhen fact lift present law states due strange confluence conditions aerodynamics beyond ken modelers Highly interesting fact modffied Rookie comes close will duplicate inverted phenomenon much heavier balanced one-third chord whereas original lighter CG 40% chord will have noted Joe Tschirgis references balance points balance 40% what new Rcokie surprises people fly its ability go inverted slightest urging remain inverted ease long periods steering such inverted Figure 8s additionally implies non-symmetrical craft kind disposition surfaces thrust line etc could fine-tuned maximize desired end product series de velopment Bats belfry know whats So whats Purple Plan mail brings mention some guys Purple Plan repairs finishing dusty frameworks hanging think AMA should have Purple Plan badge could wear proudlyor pin rear buddy cant get acttogether now alas probably 50% remember did see column year ago Purple Plan important tote keeps up well have rerun item Ive now applied flying keep saying Wait till next year next year field muddy early spring winds blow gets tco hot gets windy again too cold Once snow sleet fog no excuses October sometimes late September November later golden days Like Ba hamas wind III can get two perfect October days makes up year worthwhile make another plane two over months via Purple Plan flying career goes FLYS GREAT IDEAL BEGINNERS AIRPLANE THAT BUILDS IN HALF THE TIME Jig built balsa fuselage 90% Built wing Excellent instructions first time builder Full size plans Decal forms windshield JOHNNIE CASBURN MANUFACTURING CO 5115-SE E Rosedale Fort Worth TX 76112 Day 817/451-7537 t 817/572-1452 always another golden October modified Rookie Enya fourstroke 60 sat unpainted nearly year flies beautifully thrust torque its 14-6 8300-8500 awesome especi ally pulling through tight slowed up close-in aerobatics wont fly helper reminds crewing Giant Scale Aristocrat 18-6 prop 7000 rpm need two-hand hold remote glow plug battery connection must things would simpler years Ive requests plans Rosenstock see ads has plans early-1960s version youll able get plans new Model Builder before too long bought first kit cant believe Midways Dennyplane want build think aluminum-cowled round OldTimer has dream too years wood cutting first rate plans something else old-timer old-fashioned plan always some mistake few details doesnt matter since need lines pin down spars longerons etc plan certainly authentic mid-30s box has original Dennyplane labels picture Denny himselfwith goggles Typical day theres block listing guys drew traced whatever signed off including ol Reggie himself some other modem names No cross sections no rib patterns outline side view. s way Im delighted know fineflying ancient model actually looks like airplane took plunge because showed pictures Dennyplanes got me. may go first Sigs new Kaydet Senior big bird trainer bigger Eagle three channels lots openframe stuff fuselage once flew planes like 19s rudder-only control almost no elevatorsnot throttle have aileron jobs already know can enjoy floating around like bird soaring heavens isnt very windy Designer Claude McCullough has going back silk dope can Continued page 147 May1986143 CD CD 0 z 0 z 0 C/ 0 -u 0 -u m m 0 Q H CD n 0 0 C/ 0 C, 0 0 31 0 ThJ Lr N CD C, N x x x x x 01 x x x U Available NowThe New Breed Sachs/DolmarLightst weight hand start ready-to-mount engines market 31 $27500 34- $34500 37 $35500 42- $37500 Engines Complete Nothing Extra Buy Choice points 1SIba2z-SYaHP34-5Ibsftoz-65P37-SIhs4oz-CtaHP42-5Vjs3oi-7MP CDI IgnitionOption engines Throttle-coupled spark advance Features CustomIz newest German engines parts ler t ting Bolts sure Tap smoke Carburetor Linkage Ignition ICH Eiectronicsl Ignition Peck ty Switch lt Hub stor Spk Pigs Warranty Fauity Parts Workmanship T G Mfg 857 High Mountain Rd North Haiedon NJ 07508 e 201 427-3845 Plane Talk/Winter Continued page 143 enjoy does will use spoilers see article February issue plan new wrinkle hate install ailerons tape Bill Evans now AMA Museumcompany demo Slow Motion Electric Astro 25 14 cells 12 Ah capacity conned Bill roaring success direct driveaerobatics plus soaring over hour high-speed inverted flybys got five-year-old kid fly attention wanderedyou could see him watching other airplanes Yet Slow Motion sailing wide circles wide open piped 60 Desperado Evans hates stabilizers Des perado published April 1984 issue magazine has cathedral huge towering tail Stable rock course does what consider fearful high-speed aerobatics film paused ask wanted 60-powered Desperado subscribe old-fashioned explanation dihedral works plane could fly would nearly unflyable tractable Slow Motion published MA Ive told Bill could spec version match SloMo fine now has picture Dasher 60and like am willing tackle 60 Dasher max 40 power What am saying Actually Id feel good hot 25but am double-dared 74 tape showed Giant Scale CAPso pretty Look close gosh no stabilizer flights tape better what can stab Its called T-CAP slowed-up tendencies CAP stall vanished stab Slow slow fly bys tips quivering Yes hot Tschirgis crazy giant tailless Stik wonders bother making boring tail surfaces Airfoils CG locations make possible things see Thank Lord Purple Plan golden Octobers Bill Winter 4432 Altura Ct Fairfax VA 22030 Can talk ask pictures returned accompanying envelope obviously cannot use wonderful things Dont have negatives making prints ones send wont priceless Others would like see please include stamped pre-addressed envelopes least stamp Try use influence postman wont ask excess postage responding advertIsers mentIon read aboutthem ModelAviation Radio Technique/Myers Continued page 43 utor Salt Lake City area fourchannel two-stick 75 MHz radios stock time said Go ahead wont make difference also talked established hobby shop owner nearby village told RC airplanes dont sell around cant keep enough off-road RC cars stock first radio went back distributor its easy see retailers arent bad guys situation hope see suggested Bob Aberle back 1982 fre quencies divided mentioned again column June 85 discussed AMA Frequency Committee meeting November 85 reiterated John Prestons column April 86 issue wit Weve got get manufac turers permanently mark 75MHz radios use aircraft 72 MHz radios Aircraft Only right factory markings arent permanent arent put factory wont have effect probably wont happen until 1988 shared channels go away think ought put some effort making happen Ive really buried letters Please Introducing. irekIIn RIC Idle-Bar Glow Plugs Long Short Also.Only $169 Traditional line non-idle bar Glow Plugs a Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $129 Swanson Associates PO Box 151 Wayne NJS948 07470 m Custom Built Models 2036 N Thorn Ave Fresco CA 93704 em 6 pmOrder Phone 209 233-1050ask Bill If you LOVE fly HATE build Contact e solution probleml Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc - IF1yWhatIBuu1d May1986 147 lie Koush Laser Kit TG Reg $24995 hardware -$27995 SYNTHETIC LUBRICANTS CASTOR LUBRICANTS POWER ADDITIVES FREE CATALOG INcODUCT INFOTIPS UDES~ 800-242-0489 777 j3#7 Pt Box 11343 154tt57 219-749-1489
Edition: Model Aviation - 1986/05
Page Numbers: 22, 23, 24, 25, 26, 28, 139, 142, 143, 147
Bill Winter 0 Plane Talk THEY SAY can tell man books tell fellows largely kinds models build fly Before column sets sail three-yearjourney search Great White Whale owe landmark Resisting impulse explore Mice-in-Wonderland science preparing competition Scale documentation cal culated science thought-controlling judges show em everything show em nuttin known documentation done its own sake can become book book about Albatrossthe double S tells about Scale Albatros 5 WW German fighter Things such grow like ivy Lets begin Tom McCoy picture Lanzos RC-l radio job 1934 appeared column three months ago Aware McCoy old buddy Chet Lanzo asked both photos background resulted threeview Chets exciting photos presented two months back During 1980 bull session Chet men tioned drawing plans forgotten wun derkind remark went over Toms head until saw Chet fly pretty bird SAM Champs Westover AFB 1982 supposes knew what looking subsequent meet Cleveland Tom realized earliest-ever RC jobs Chet gave him plans romance RC-l began happened Toms photos RC-l arrived docu mentation book Albatross did color shots stable superbly-built OldTimers Antiques exquisite Tom demon competitior well 1984 alone compressed-air King Burd took first SAM Champs RC-1 won another Michigan State Champs DRCC OldTimer still another RC Old-Timer Detroit Expo second OldTimer Toledo Lanzo Bomber OldTimer won first MRCA Show second Detroit RC contest third New York State Championships Building 38 years Tom joined AMA Detroit Balsa Bugs 12 1952 Junior AMA Champion winning Cooper Brothers Trophy Indoor Rubber 19 flew first RC Berkeley Cavalier Citizen ship 465 equipment Having published first license free RC plans ever MAN 40s using pre-production sample radio can attest 19-yearLeft Tom McCoy Lanzo Bomber RC first 1983 Toledo Show Tom favors natural yellow silk variations trademark color schemes consisting blue black trim often white striping set things off Above Compressed air King Burd atthe 1982 MichIgan State Meet boxy Robin-like modeiwon boththeSAM Champsand MiniChamps Ribs narrowtips wing tail holed forlightness Winterwonders abouta 1 0-1 5 gasfor oran electric motorforhigh-time duration over 40 wins golden oldies mostly firsts seconds Tom McCoys virtual museum pieces show little no sign strenuous competitions show seven examples selected Toms scrapbook really much like Scale documentation book Leading off Albatross design George Reich really turns Winter 80-In semi-cabin design competitive pylon ships Toms model first Dennymite engine now has ignition Super Cyclone piece wood carefully selected holes cut ribs forextra lightness plus lightweight silk covering clear dope finish keeps wing loading 8 oz per sq ft FF 10 RCI Has thick high-lift wing high thrust line shock gearprecisely like original old guy like Tom managed 465 project survivor Alamo Tom founder Detroit RC Club 29 years ago origi nators Toledo RC Exposition also versatile enough have won second Michigan State Meet Lacy 10 M Peanut During 1980s Torns oldies have taken 39 high places Toms documentation time-trip book Tie string around finger. have luck Irish seeing legendary fliers make great flights Lew Mahieu Dooling 29 tiny Zeek Joe Konefes 44-min Bombshell Chicago Roy Nelder launching Moffett winner Copland Jim Cahill Wakefield-winning Clodhopper Wris ton Dague Carl Goldberg diamond Zipper Interceptor Sailplane Valkyrie Cumulus Gordon Light Lanzos Bomber RCs big Puss Moth flew like Mulvihill Kovel KG Bassett talring Eastern States So-Long Elgin Playboy timed Kordas mighty Wakefield flight Aldrich Nobler Yates Madman Palmer often Saftig Zilch 445-pm shoot-outs Speed Walker Goods Kasmirski Orion Bon ner Smog Hog ff1 sat down sky fell Weird So watched among others George Reich Albatross left lifetime impression least 30 years no seemed notice Ive looked plans times published designed 1940 Air Trails Reich two-time Wakefield team mem ber once winning fabled cup Dick Kordas brother-in-law another Cleveland band immortals still builds flies oldies SAM stuff Albatross discovered bang Pylon Free Flight models ruled iron hand good 20 yearsthey alone could handle high power witness modern Satellite Yet like Konefes Reich went cabin design George secret side profile gave high wing like pylon high thrust line made fly like postwar 1950-1960 high-thrust pylons could climb safely dead ahead bored holes sky combi nation Albatross ideal now super-stable loafing around RC assist Old-Timer bag Oddly has lifting-type tail CG one-third wing chord supposes Astro cobalt geared 40 16 cells would get high enough 12 min Electric McCoys book full surprises sort modeling family bible Only notebook gee er featuring Alba tross Xerox some art directors work Id guess alone makes unique page encased protective plastic begins simply pageeverything throughout neatly typedcalled Old-Timer RC Mod el tabulated vital specs flip side against black background old magazine clipped photo guys room 1939 Nats Reich Elgin Korda McCoy others Another page describes original Alabatross along color photo Reich 1982 Lanzo Bomber Thats followed entire construction feature 1941 Air Trails two pages entitled Model Virtually page includes some old clipping involved old-timers relevant models page about engine quote tells work good read Super Cyclone 60 gift old friend Harvey Thomasian Worster MA Harvey old-time engine man particularly famous customtuned K&B engines during late 1 950s early 1 960s Harvey has large collec tion old ignition engines Cy clone certainly beautiful Although Left Toms model very popularTaibi Powerhouse placed second 1983 MIchigan State Old-TimerContest models shown have won other places Right First place Toledo 1982 went Toms rendition Maurice Schoenbruns Gladiator Like other Schoenbruns classics distinguished ample area deep belly high thrust line long tall moment Another cabin model Left Another Lanzo design Record Breaker isa functional parasol nice lines shot Danny Sheelds Americas unofficial Old-Timer goodwill ambassador British events Right Berkeleys Buccaneeretili built great numbers Heres Tom rendition 19308 classic Thanks early RC efforts Joe Raspante design also authentic RC Old-Timer Joeswasa monstrous size May1986 23 Stinson SR-S Megow followed about cowl bumps Winter says did bigger 1934-35 Flying Aces built sizes up 45-in span Bell relates bittrickyto adjust poor glide after power ran out glide improved after wear tear patches previously-siickwing Winter launching Rearwin Speedster indoor Scale meet Bill Bell says Speedster notes cheated Rubber first new models 1980 Once kitted Peerless 24-in-span design Scale designs generous tail area insomewhat beefed up still good flier indoors out Bell photos Tom Schmitt creases Made em fly much better says Left Pleet Trainer another Peerless two profile pilots impressive radial engine nose plug being readied winding stooge second Bell project required dihedral top wing good flight fuil-scale ship nonewhich would fine RC Right Caimly Bell gets off perfect two-hand launch dainty bipe Model has flying wires although cant seen plc its looks may fool new engine well broken-in pleasantly surprised find will turn 8500 rpm 14-4 Tis small world Harvey buddy Hal deBolts roughly 30 years ago published Live Wire-type plane Harvey trike gear Just lately during -scale Vagabond project supplied photos full-scale red-and-white Vag Just today same photos much other documentation sent HA Thomas similar project friend Hartsfield Little Rock Thomas McCoys book turns Propeller Tom says flatly present-day props unsuitable old ignition engines simi larly can tell traditional props best four-stroke engines no 3-in pitches FF useful prop case TF 11-4 has wrong blade shape lower ignition rpms Tom tells us may have heard low-wing Spartan did know also cabin version Bells third project once Comet kit Bill says its often mistaken fora Stinson Note ring cowl circa 1930 struts Neat two-hand launch Bill uses smooth fluid 24 Model Aviation Left Flying through skies Ninjing China Joe Tschirgis Short Stik tailless shortened Giant Stik currently powered 2500cc Supertigre Waibo pumpercarb No trick airfoil elevons widened Does nice wingovers buttall makes crosswind taxiing pain Text detalis Tachirgis expianation symmetrical wing standard zero-zero conventional piane may appearto fly level trim kind Refer diagram below follow discussion Right Can beileve Its Joe Tschirgl Stik its derived Bill Evans tailless technoiogy Older CL Combat fliers may remember Nobody design almost identical approach book has stuff reworking props Lost Ark data coming 1940 Air Age Annual Air Age corporate name MANs publisherbut doubt MAN annual 1940 whereas Air Trails did Thomas article certainly needs republishing Replete wonderful draw ings about methods obtaining truepitch prop includes blade top side profiles 14-8 probably would make Enya 60 four-stroke run like blue blazes Suffice say McCoy constantly pressured great props various hands have impres sive win record INVERTED TRIM PITCHING MOMENT ABLE REGION ANGLE OF ATrACK 4- FROM ZERO LIFT UPRIGHT TRIM POINT s new modeis foiiowed Taylor Cub Peerless Cessna C34 neither shown 24-in Taylor best lot though beefed up Beli states almost lost number times Above Aftera Fokker 0-Vil Scientific made tight turns fine glide good fiying indoors Bill built very beautifui Douglas Vi 0-43 Comet shown two views iost powerfui thermai 1984 now has repiacementversion forflying indoors Below Nicelydetailed resplendent Navy colors Beils F4B-4 American Modeicraft big use indoors waiting forgood outdoorweather Pianetakes six strands Ia-in rubber one-third Toms book states following section presen tation personal about mod els Thats beyond reporting talents Color pictures galore red blue yellow win ribbons Reports various major SAM meets can select some photos Toms models run descriptive captions ways fly alas horde newcomers may never discover before run course Bud Davisson gifted pilot word-maker does the Cockpit series MAN talked Command Air cover January 1986 MAN put extremely well urged Giant Scalers Continued page 26 May198625 Winning Ideas FOURMOST RETRACTABLE iTOWHOOKRELEASE Price 8690 V y4 F Simplest reliable device available After line released hook retracts body unit leaving SMOOTH surface bottom aircraft No special attachments required N eight Y2 oz OTHER FOURMOST PRODUCTS 0491051 AIRFLO ENGINE MOUNT 40 AIRFLO ENGINE MOUNT IDEAL FOR GUICKY 500 PRICE $630 REDUCES DRAG VIBRATION FREE PRICE $300 Fuel Fitting Sets Fuel Shut Off Fuel Manifold Gaplese Hinges Gapless Hinge Slotter Strut Fairings Codcpit Coaming nd SASE Complete Information 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 NEW GLASS FILLED MOTOR MOUNTS 0405 1011 1519 2025 3035 4045 40451 5050 5070 195 225 235 245 265 275 300 325 325 OEM BULK INQUIRES INVITED Featuring LONG GLASS FILLED NYLON FOR STRENGTH AND STABILITY Alignment Lines Mounting Interchangeable Kraft Flat bottom nose gear SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 AREA CODE 513 738-1576 put Technopower radial stand out bipe dont let see giving airplane Warp 9 performance said Let float along Let poke slowly can retrieve running under grabbing Let change pace Bud may have gotten bit carried away indelible experi ence nearly 50 years ago 30-in rubber-powered SE-S Joe Ott design Bud added Youll guy field can zig should have zagged push should have pulled will have airplane gives him plenty time correct mistakes Itll model because does 1/1 scale Two worlds Fly power Fly wing both prithee Bud could speaking old-timers things fly wing goes far beyond old-timers Years ago people tired the wall-to-wall Pattern-type thing escaped RC Sailplanes must have noticed years heavy advertising popularity Flying wing antique fetish What airplane during its aerobatic routine wonderfully fulfilling letting air plane itself almost sheer beauty flight equally fulfilling gotta have power Sailplane has except gravity Zero displacement maybe should keep scrapbooks rainy days doesnt rain gentleman Dihedral Ave address omen never saw Bill Bell come-backer So thousands born-again readers special case course chose specialized beautiful Tom McCoys brilliant pursuit Old-Timers ap preciate Rubber Scaleas us whether fly themBills efforts merit resounding well done As kid during Thirties Bill built Scale models 10- 25- 50-cent kits Megow Comet etc did vast multitude 1980 interest stick-and-tissue birds rekindled discovery Golden Age Reproductions new kit models put out Joe Fitz gibbons Tom Schmitt takes memo rable pictures wanders provides delightful prints make report possible Suppose group few Bill Bells Rubber Scale ships captions does other things too bumped him once flying dream Stearman biplane Flyline Models kit engine lo behold other models old designs case AMA Museum highlights some misdeeds written Bill finishing Albatros D-5 garish streamlined fighting machines WW D-5 some reason makes stupendous flier view pictures way Scale guys will dreaming manner RC things including Giant Continued page 28 26 Model Aviation FCYANOACRYLATE List Sale Savings 1 oz Fast Cure 3-5 Sec 495 $2 500/0 Off 2 oz Fast Cure 3-5 Sec895$396560/0 Off 1 oz Gap-Filling 5 Sec495 $2 50% Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave San Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 408 251-0789 Out StateINFO 408 251-0787 California Hours Mon-Wed Fri & Sat 930-530 Thur 930-900 1200-500 Pronto Retail $3995 Super Pronto Retail $4995 HIGH QUALITY 48 SPAN KIT FOR 09 TO 25 ENGINES FEATURES low wing design high wing stability excellent inverted performance Gentle novice Expert versatile performance 4-6 hour rapid-fire assembly beginner Precision machine-cut SIG balsa plywood spruce Rolled full size plans showing complete wing Step-by-step instructions easy assembly Formed main landing gear Exceptional small field performance May flown ito 3 channels Tested recommended approved b RIO Modeler Magazine Model aviation July 84 Virginia residents add 40/o sales tax Playmate ready now 5 15 pan 50 2 4 cycle TIDEWATER HOBBY ENTERPRISES Route 1 Box 2410 Lanexa Virginia 23089 Lftj9i Phone 804 966-5092 Scale course Rubber Scale guys will go ga-ga little traveling music please . Nanjing China Warning rock slides ahead Set stage cast characters bit background like strange airplanes anybodys impossible novel ties Since violate no aerodynamic law notions airplanes must fly has narrowly rigid Among us little knowledge can dangerous thing Maybe its good challenge traditions live Virginia Im Missouri am open-minded least dozen things including cockeyed dihedral explanations Im far out flexible Ive never seen genuine proof synimetrical-airfoiled wing zero-zero setup cant maintain level flight being trimmed ele vated up down does see strange things however elemental truth am necessarily stupid Okay engineers know some lift must developed situations agree shakily disagree Now time-out introduce Joe Tschir gi writes hotel room opposite side globe Joe respected old-timer fa mous strange airplanes ortho dox Scale models beautiful fliers apt strange Some may re member things like German WW Brandenberg biplane flying boats really strange Scale bird its prop located aft wings conventional fuselage Play mechanics once member own club NVRC prior coming Virginia years ago involved pro fessionally drones stuff knows subject description out-of-control RC model reed Rookie December issue caught eye Joe begins some years Ive trying finish series articles stability control mod els Its natural endeavor since before retiring 18 months ago fooled people believing knew something about sub ject 35 years Anyway question good Pattern models need little no down trim level inverted flight has always bothered Since wife decided masquerade English teachers Nanjing Ive time think about problem believe now have answer Authors Note excellent technical discussions received column one-on-one basis because references mysterious things ob served fun theme best served avoiding esoteric deep stuff example pile brilliant papers pro con relating air ocean debate fills series large manila envelopes Some letters exceed length column making exception Joe Tschirgi hoped reader will drop out Continued page 139 28 Model Aviation DAVE ROBELENS PRONTO AAJfl IIPPR PRAAITA per oreer FAST SERVICE COD ADD $190 Letters Editor Continued page 12 Thus weve filed criminal complaint charges against guy shooting down airplanes flying through sky Its lengthy battle prosecute sin come down home stretch hope will win Now before leave office have recommendation state Lets finish up court case forget about hate Weve lived through three years prob lems some us its rough Lets get sport model avi ation weve suffered long enough Mike Barklow Appleton WI accompanying letter Mike said foregoing poem written 1983 stepping down president Valley Aero Modelers clubs newsletter notpri nted due suit progress Despite best efforts club lost flying field doldrums briefperiod maintaining positive attitude group able establish new flying site rebuild itself now bigger better ever very gratying to organization Mike notes Safety/Preston Continued page 20 about accident members havent heard heres story heard few weeks ago member friend out flying weather fairly cold member standing wing tip friends plane friend attempting start using standard electric starter plastic engagement cone Somehow engine started friend surprised starter slipped off spinner hit ground trigger still depressed strn spin ning plastic cone exploded sending fragments directions friend got small piece through part ear sliver hit member corner eye caine out again doctor says 50% chance will lose eye may have have cornea transplant incident tragic enough itself stop think what could have happened occurred field person hurt innocent bystander kid Weve got keep spectators children out pit area Friends not. comment incident repeat something Ive said several times previously consider pair safety glass es starting model working shop Have safe month John Preston 12235 Tildenwood Dr Rockville MD 20852 Plane Talk/Winter Continued page 28 things become bit sticky Some will understand presentation its entirety am fortunates can interpret comments virtue simple diagram no math Will prescription fly Ponder photo giant tailless Ugly Stik involves no trick airfoils Follow Joe end youll find other comments play Let assume perfectly symmetric aircraft argument Tschirgi warms up has symmetric airfoils both wing tail thrust line wing tail CG centerline has zero-zero incidence setup also assume fore-and-aft CG position such model trim level flight Since model perfectly symmetric pitch plane its obvious model will also fly straight level verted assumptions solu tion clear leaves another problem can such model trim angle attack except zero tricky part model symmetric angle attack airflow over Behind wing generating lift have downwash evidence vorticity shed wing Its strength centerline strong function aspect ratio normal model configurations downwash small function angle attack concentrated directly down stream model changes angle attack tail sweeps through region Generally results pitching moment curves nonlinear have reduced static stability near zero lift sym metric model assumed stabil izer center downwash field However CG far enough aft static stability can zero unstable region exhibiting positive static margins outside unstable point maximum downwash effect model will have two trim points symmetric model postulated would equal opposite sign lift coefficients best visualized referring illustration fact dynamic pressure re duced wings wake Joe goes also contributes non-linearity course reversal cannot exist unless static stability quite small tail out wakeie CG well aft brings up another interesting point models easy fly some cases easiest have little static Continued page 142 May1986 139 n ou sy SEE- HFE THE BOTTLE OF ZRPJET LEPKED FiND sNIcKE YOU TRIED TO SCRPTCH YOUR GIGGLEEP / 0 ZIin ZSOL 92 span 19-21 lbs $20995 Piper PA-17 Vagabond 84 span 10 lbs $15995 Super P11 92 span 19-21 lbs $18995 Chipahip 90 80 span 1/5 scale $12995 TalIwbeel Assemblies 3-8 lbs$1095 4-9 lbs$1295 10-l8lbs$1495 lOibsaup$1595 Manufacturers Softglass Fast Tape Fast Threads 1/4 Scale Pilots Plans construction models three large sheets eli parts shown full scale Weighs down construction bales plywood Models available F 84-F Thunderetreak Sabre F 100 Super Saber Fighting Falcon Eagle Mirage 2000 21 Fishbed i Blackbird F 104 Scarf ighter Fit types ducted fan units wheel 5 dia 40 80 engines Available also motor ducted fan unit sod canopy Price plan 5000 US dollars includes shipment air mail rolled tube Write free literature InformatIon G Bertella Via Matteotti 248 Gardone VT 25063 Brescia Italy 1981 World Soaring Champ DWIGHT HOLLEY FEATURES Sailplanes lous Electric Planes AS1IOFLIOHT e UNGE e 11113 MOICIS IN STOCK SANYO SANYO SANYOBattery Special NSOOAR Weigh 36 Grams Cut Oficells NEW Lower Price Red Jacket Cut Off cells N1200SCR Weigh 52 Grams $340 1200MAH Now 2 New Super Cells Sanyo N-900SC SCR Cut Off cells $375 Both weigh 39 Grams 3/4 length 1200s same dia N900SC will deliver least 950 MAH N900 SCR will deliver great amperage quickly oELECTRIC MODEL SAILPLANE SPECIALISTSHOLLEYS SILENT FLIGHT FEATURING ONLY STATE OF THE ART ITEMS 03 748-0083 LUCALL OR WRITE FOR FREE DESCRIPTIVE FLYER 151 CHESTNUT RIDGE RD BETHEL CT 06501 U MS SPEED CONTROLLERS e GRAUPNERe ASTROFLIGHT KELLER UNGER Plane Talk/Winter Continued page 139 stabilityat Static margins percent chord would dangerous full-scale aircraft Conventional models have dynam ic stability far excess full-scale aircraft because very low density fact believe modelsparticularly Pat tern RC duration power modelsare dead-beat fundamental pitch modes allows marginally-stable stat ically RC model easily flown Fur ther low static stability high dynamic stability required model going groove same qualities needed Free Flight models handle high powerbut another long story As might have gathered Im con vinced dynamic stability damping important primary factor suc cessful model design primary factor both pitch stability control both RC FF Power also major requirement spiral stability Free Flight models discussion has simplified assuming symmetric model same two-trim-point pitching moment curve possible asym metric model including cambered wing fact inclusion cambered wing may make easier achieve However explanation much involved since cambered airfoils pitching moment necessary ingredient two-static-trim-point mo ment curve certainly flyableI believe have done itI doubt total cause unusual incident Tschirgi continues believe Janomo lie would noticed corrected example bit down elevation fed level flight model would shift negative trim point stay trimmed elevator neu tralized CG assumed moment curve shifted bit forward un stable region would become flat very slightly stable double trim point would vanish very slight amount down elevator trim would make second trim point reappear believe typical condition RC model 0 0 0 0 Ce 0 2 0 Ce Ce m -l 0 2 Cit C F F grooves well remember reed servos fairly wide deadband neutral because use slide switch contacts Hence think model grooved well servo stopped downside deadband Au Eureka finally know Only once before has anyone offered respectful comment observation zero-zero symmetrical wing sometimes gives impression model can remain straight level control input observation flies face truth wing must generate lift hold such attitude Years ago asked Joe Wagner thought such setup could maintain straight level possible Joe replied sym metrical wing changing its angie attack between positive negative over small range trim its doing visible eye wonder now about Wagners ooncept invisible chang ing trim exists necessarily has two limitspositive negative note Tschirgis diagram need understand two trim points calls out shown intersections line labeled Angle Attack Zero Lift say wonder strange out-of-control flight Rookie occurred 1962 Control lost plane inverted overhead low altitude up-trim rolled inverted obviously no downtrim oould inputted inverted since control gone plane circled entire area maintaining constant altitude eventually arriving low overhead original headingat point control regained quick landing plane symmetrical Yo-/3 semi-symmetrical airfoil some angu lar difference some dihedral high thrust line design factors oom bined especially high thrust line low thrust line inverted help maintain impossible level flight probably could servo stopped side neutral Tschirgi said would impart unknowing slight down elevator trim dont forget Tschirgis analysis shows truly142 Model Aviation Ohio 11376 Ridgeway Rd Kensington OH 44427 216223-1950 1 Full Size Plans Ducied Fans 1 J C Trainers_ Wing 60 Size40 SemhSyme Size20 Size See local dealer call us location dealer nearest symmetrical model also could maintain straight level flight under same conditions eye old Rookie generating liftwhen fact lift present law states due strange confluence conditions aerodynamics beyond ken modelers Highly interesting fact modffied Rookie comes close will duplicate inverted phenomenon much heavier balanced one-third chord whereas original lighter CG 40% chord will have noted Joe Tschirgis references balance points balance 40% what new Rcokie surprises people fly its ability go inverted slightest urging remain inverted ease long periods steering such inverted Figure 8s additionally implies non-symmetrical craft kind disposition surfaces thrust line etc could fine-tuned maximize desired end product series de velopment Bats belfry know whats So whats Purple Plan mail brings mention some guys Purple Plan repairs finishing dusty frameworks hanging think AMA should have Purple Plan badge could wear proudlyor pin rear buddy cant get acttogether now alas probably 50% remember did see column year ago Purple Plan important tote keeps up well have rerun item Ive now applied flying keep saying Wait till next year next year field muddy early spring winds blow gets tco hot gets windy again too cold Once snow sleet fog no excuses October sometimes late September November later golden days Like Ba hamas wind III can get two perfect October days makes up year worthwhile make another plane two over months via Purple Plan flying career goes FLYS GREAT IDEAL BEGINNERS AIRPLANE THAT BUILDS IN HALF THE TIME Jig built balsa fuselage 90% Built wing Excellent instructions first time builder Full size plans Decal forms windshield JOHNNIE CASBURN MANUFACTURING CO 5115-SE E Rosedale Fort Worth TX 76112 Day 817/451-7537 t 817/572-1452 always another golden October modified Rookie Enya fourstroke 60 sat unpainted nearly year flies beautifully thrust torque its 14-6 8300-8500 awesome especi ally pulling through tight slowed up close-in aerobatics wont fly helper reminds crewing Giant Scale Aristocrat 18-6 prop 7000 rpm need two-hand hold remote glow plug battery connection must things would simpler years Ive requests plans Rosenstock see ads has plans early-1960s version youll able get plans new Model Builder before too long bought first kit cant believe Midways Dennyplane want build think aluminum-cowled round OldTimer has dream too years wood cutting first rate plans something else old-timer old-fashioned plan always some mistake few details doesnt matter since need lines pin down spars longerons etc plan certainly authentic mid-30s box has original Dennyplane labels picture Denny himselfwith goggles Typical day theres block listing guys drew traced whatever signed off including ol Reggie himself some other modem names No cross sections no rib patterns outline side view. s way Im delighted know fineflying ancient model actually looks like airplane took plunge because showed pictures Dennyplanes got me. may go first Sigs new Kaydet Senior big bird trainer bigger Eagle three channels lots openframe stuff fuselage once flew planes like 19s rudder-only control almost no elevatorsnot throttle have aileron jobs already know can enjoy floating around like bird soaring heavens isnt very windy Designer Claude McCullough has going back silk dope can Continued page 147 May1986143 CD CD 0 z 0 z 0 C/ 0 -u 0 -u m m 0 Q H CD n 0 0 C/ 0 C, 0 0 31 0 ThJ Lr N CD C, N x x x x x 01 x x x U Available NowThe New Breed Sachs/DolmarLightst weight hand start ready-to-mount engines market 31 $27500 34- $34500 37 $35500 42- $37500 Engines Complete Nothing Extra Buy Choice points 1SIba2z-SYaHP34-5Ibsftoz-65P37-SIhs4oz-CtaHP42-5Vjs3oi-7MP CDI IgnitionOption engines Throttle-coupled spark advance Features CustomIz newest German engines parts ler t ting Bolts sure Tap smoke Carburetor Linkage Ignition ICH Eiectronicsl Ignition Peck ty Switch lt Hub stor Spk Pigs Warranty Fauity Parts Workmanship T G Mfg 857 High Mountain Rd North Haiedon NJ 07508 e 201 427-3845 Plane Talk/Winter Continued page 143 enjoy does will use spoilers see article February issue plan new wrinkle hate install ailerons tape Bill Evans now AMA Museumcompany demo Slow Motion Electric Astro 25 14 cells 12 Ah capacity conned Bill roaring success direct driveaerobatics plus soaring over hour high-speed inverted flybys got five-year-old kid fly attention wanderedyou could see him watching other airplanes Yet Slow Motion sailing wide circles wide open piped 60 Desperado Evans hates stabilizers Des perado published April 1984 issue magazine has cathedral huge towering tail Stable rock course does what consider fearful high-speed aerobatics film paused ask wanted 60-powered Desperado subscribe old-fashioned explanation dihedral works plane could fly would nearly unflyable tractable Slow Motion published MA Ive told Bill could spec version match SloMo fine now has picture Dasher 60and like am willing tackle 60 Dasher max 40 power What am saying Actually Id feel good hot 25but am double-dared 74 tape showed Giant Scale CAPso pretty Look close gosh no stabilizer flights tape better what can stab Its called T-CAP slowed-up tendencies CAP stall vanished stab Slow slow fly bys tips quivering Yes hot Tschirgis crazy giant tailless Stik wonders bother making boring tail surfaces Airfoils CG locations make possible things see Thank Lord Purple Plan golden Octobers Bill Winter 4432 Altura Ct Fairfax VA 22030 Can talk ask pictures returned accompanying envelope obviously cannot use wonderful things Dont have negatives making prints ones send wont priceless Others would like see please include stamped pre-addressed envelopes least stamp Try use influence postman wont ask excess postage responding advertIsers mentIon read aboutthem ModelAviation Radio Technique/Myers Continued page 43 utor Salt Lake City area fourchannel two-stick 75 MHz radios stock time said Go ahead wont make difference also talked established hobby shop owner nearby village told RC airplanes dont sell around cant keep enough off-road RC cars stock first radio went back distributor its easy see retailers arent bad guys situation hope see suggested Bob Aberle back 1982 fre quencies divided mentioned again column June 85 discussed AMA Frequency Committee meeting November 85 reiterated John Prestons column April 86 issue wit Weve got get manufac turers permanently mark 75MHz radios use aircraft 72 MHz radios Aircraft Only right factory markings arent permanent arent put factory wont have effect probably wont happen until 1988 shared channels go away think ought put some effort making happen Ive really buried letters Please Introducing. irekIIn RIC Idle-Bar Glow Plugs Long Short Also.Only $169 Traditional line non-idle bar Glow Plugs a Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $129 Swanson Associates PO Box 151 Wayne NJS948 07470 m Custom Built Models 2036 N Thorn Ave Fresco CA 93704 em 6 pmOrder Phone 209 233-1050ask Bill If you LOVE fly HATE build Contact e solution probleml Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc - IF1yWhatIBuu1d May1986 147 lie Koush Laser Kit TG Reg $24995 hardware -$27995 SYNTHETIC LUBRICANTS CASTOR LUBRICANTS POWER ADDITIVES FREE CATALOG INcODUCT INFOTIPS UDES~ 800-242-0489 777 j3#7 Pt Box 11343 154tt57 219-749-1489
Edition: Model Aviation - 1986/05
Page Numbers: 22, 23, 24, 25, 26, 28, 139, 142, 143, 147
Bill Winter 0 Plane Talk THEY SAY can tell man books tell fellows largely kinds models build fly Before column sets sail three-yearjourney search Great White Whale owe landmark Resisting impulse explore Mice-in-Wonderland science preparing competition Scale documentation cal culated science thought-controlling judges show em everything show em nuttin known documentation done its own sake can become book book about Albatrossthe double S tells about Scale Albatros 5 WW German fighter Things such grow like ivy Lets begin Tom McCoy picture Lanzos RC-l radio job 1934 appeared column three months ago Aware McCoy old buddy Chet Lanzo asked both photos background resulted threeview Chets exciting photos presented two months back During 1980 bull session Chet men tioned drawing plans forgotten wun derkind remark went over Toms head until saw Chet fly pretty bird SAM Champs Westover AFB 1982 supposes knew what looking subsequent meet Cleveland Tom realized earliest-ever RC jobs Chet gave him plans romance RC-l began happened Toms photos RC-l arrived docu mentation book Albatross did color shots stable superbly-built OldTimers Antiques exquisite Tom demon competitior well 1984 alone compressed-air King Burd took first SAM Champs RC-1 won another Michigan State Champs DRCC OldTimer still another RC Old-Timer Detroit Expo second OldTimer Toledo Lanzo Bomber OldTimer won first MRCA Show second Detroit RC contest third New York State Championships Building 38 years Tom joined AMA Detroit Balsa Bugs 12 1952 Junior AMA Champion winning Cooper Brothers Trophy Indoor Rubber 19 flew first RC Berkeley Cavalier Citizen ship 465 equipment Having published first license free RC plans ever MAN 40s using pre-production sample radio can attest 19-yearLeft Tom McCoy Lanzo Bomber RC first 1983 Toledo Show Tom favors natural yellow silk variations trademark color schemes consisting blue black trim often white striping set things off Above Compressed air King Burd atthe 1982 MichIgan State Meet boxy Robin-like modeiwon boththeSAM Champsand MiniChamps Ribs narrowtips wing tail holed forlightness Winterwonders abouta 1 0-1 5 gasfor oran electric motorforhigh-time duration over 40 wins golden oldies mostly firsts seconds Tom McCoys virtual museum pieces show little no sign strenuous competitions show seven examples selected Toms scrapbook really much like Scale documentation book Leading off Albatross design George Reich really turns Winter 80-In semi-cabin design competitive pylon ships Toms model first Dennymite engine now has ignition Super Cyclone piece wood carefully selected holes cut ribs forextra lightness plus lightweight silk covering clear dope finish keeps wing loading 8 oz per sq ft FF 10 RCI Has thick high-lift wing high thrust line shock gearprecisely like original old guy like Tom managed 465 project survivor Alamo Tom founder Detroit RC Club 29 years ago origi nators Toledo RC Exposition also versatile enough have won second Michigan State Meet Lacy 10 M Peanut During 1980s Torns oldies have taken 39 high places Toms documentation time-trip book Tie string around finger. have luck Irish seeing legendary fliers make great flights Lew Mahieu Dooling 29 tiny Zeek Joe Konefes 44-min Bombshell Chicago Roy Nelder launching Moffett winner Copland Jim Cahill Wakefield-winning Clodhopper Wris ton Dague Carl Goldberg diamond Zipper Interceptor Sailplane Valkyrie Cumulus Gordon Light Lanzos Bomber RCs big Puss Moth flew like Mulvihill Kovel KG Bassett talring Eastern States So-Long Elgin Playboy timed Kordas mighty Wakefield flight Aldrich Nobler Yates Madman Palmer often Saftig Zilch 445-pm shoot-outs Speed Walker Goods Kasmirski Orion Bon ner Smog Hog ff1 sat down sky fell Weird So watched among others George Reich Albatross left lifetime impression least 30 years no seemed notice Ive looked plans times published designed 1940 Air Trails Reich two-time Wakefield team mem ber once winning fabled cup Dick Kordas brother-in-law another Cleveland band immortals still builds flies oldies SAM stuff Albatross discovered bang Pylon Free Flight models ruled iron hand good 20 yearsthey alone could handle high power witness modern Satellite Yet like Konefes Reich went cabin design George secret side profile gave high wing like pylon high thrust line made fly like postwar 1950-1960 high-thrust pylons could climb safely dead ahead bored holes sky combi nation Albatross ideal now super-stable loafing around RC assist Old-Timer bag Oddly has lifting-type tail CG one-third wing chord supposes Astro cobalt geared 40 16 cells would get high enough 12 min Electric McCoys book full surprises sort modeling family bible Only notebook gee er featuring Alba tross Xerox some art directors work Id guess alone makes unique page encased protective plastic begins simply pageeverything throughout neatly typedcalled Old-Timer RC Mod el tabulated vital specs flip side against black background old magazine clipped photo guys room 1939 Nats Reich Elgin Korda McCoy others Another page describes original Alabatross along color photo Reich 1982 Lanzo Bomber Thats followed entire construction feature 1941 Air Trails two pages entitled Model Virtually page includes some old clipping involved old-timers relevant models page about engine quote tells work good read Super Cyclone 60 gift old friend Harvey Thomasian Worster MA Harvey old-time engine man particularly famous customtuned K&B engines during late 1 950s early 1 960s Harvey has large collec tion old ignition engines Cy clone certainly beautiful Although Left Toms model very popularTaibi Powerhouse placed second 1983 MIchigan State Old-TimerContest models shown have won other places Right First place Toledo 1982 went Toms rendition Maurice Schoenbruns Gladiator Like other Schoenbruns classics distinguished ample area deep belly high thrust line long tall moment Another cabin model Left Another Lanzo design Record Breaker isa functional parasol nice lines shot Danny Sheelds Americas unofficial Old-Timer goodwill ambassador British events Right Berkeleys Buccaneeretili built great numbers Heres Tom rendition 19308 classic Thanks early RC efforts Joe Raspante design also authentic RC Old-Timer Joeswasa monstrous size May1986 23 Stinson SR-S Megow followed about cowl bumps Winter says did bigger 1934-35 Flying Aces built sizes up 45-in span Bell relates bittrickyto adjust poor glide after power ran out glide improved after wear tear patches previously-siickwing Winter launching Rearwin Speedster indoor Scale meet Bill Bell says Speedster notes cheated Rubber first new models 1980 Once kitted Peerless 24-in-span design Scale designs generous tail area insomewhat beefed up still good flier indoors out Bell photos Tom Schmitt creases Made em fly much better says Left Pleet Trainer another Peerless two profile pilots impressive radial engine nose plug being readied winding stooge second Bell project required dihedral top wing good flight fuil-scale ship nonewhich would fine RC Right Caimly Bell gets off perfect two-hand launch dainty bipe Model has flying wires although cant seen plc its looks may fool new engine well broken-in pleasantly surprised find will turn 8500 rpm 14-4 Tis small world Harvey buddy Hal deBolts roughly 30 years ago published Live Wire-type plane Harvey trike gear Just lately during -scale Vagabond project supplied photos full-scale red-and-white Vag Just today same photos much other documentation sent HA Thomas similar project friend Hartsfield Little Rock Thomas McCoys book turns Propeller Tom says flatly present-day props unsuitable old ignition engines simi larly can tell traditional props best four-stroke engines no 3-in pitches FF useful prop case TF 11-4 has wrong blade shape lower ignition rpms Tom tells us may have heard low-wing Spartan did know also cabin version Bells third project once Comet kit Bill says its often mistaken fora Stinson Note ring cowl circa 1930 struts Neat two-hand launch Bill uses smooth fluid 24 Model Aviation Left Flying through skies Ninjing China Joe Tschirgis Short Stik tailless shortened Giant Stik currently powered 2500cc Supertigre Waibo pumpercarb No trick airfoil elevons widened Does nice wingovers buttall makes crosswind taxiing pain Text detalis Tachirgis expianation symmetrical wing standard zero-zero conventional piane may appearto fly level trim kind Refer diagram below follow discussion Right Can beileve Its Joe Tschirgl Stik its derived Bill Evans tailless technoiogy Older CL Combat fliers may remember Nobody design almost identical approach book has stuff reworking props Lost Ark data coming 1940 Air Age Annual Air Age corporate name MANs publisherbut doubt MAN annual 1940 whereas Air Trails did Thomas article certainly needs republishing Replete wonderful draw ings about methods obtaining truepitch prop includes blade top side profiles 14-8 probably would make Enya 60 four-stroke run like blue blazes Suffice say McCoy constantly pressured great props various hands have impres sive win record INVERTED TRIM PITCHING MOMENT ABLE REGION ANGLE OF ATrACK 4- FROM ZERO LIFT UPRIGHT TRIM POINT s new modeis foiiowed Taylor Cub Peerless Cessna C34 neither shown 24-in Taylor best lot though beefed up Beli states almost lost number times Above Aftera Fokker 0-Vil Scientific made tight turns fine glide good fiying indoors Bill built very beautifui Douglas Vi 0-43 Comet shown two views iost powerfui thermai 1984 now has repiacementversion forflying indoors Below Nicelydetailed resplendent Navy colors Beils F4B-4 American Modeicraft big use indoors waiting forgood outdoorweather Pianetakes six strands Ia-in rubber one-third Toms book states following section presen tation personal about mod els Thats beyond reporting talents Color pictures galore red blue yellow win ribbons Reports various major SAM meets can select some photos Toms models run descriptive captions ways fly alas horde newcomers may never discover before run course Bud Davisson gifted pilot word-maker does the Cockpit series MAN talked Command Air cover January 1986 MAN put extremely well urged Giant Scalers Continued page 26 May198625 Winning Ideas FOURMOST RETRACTABLE iTOWHOOKRELEASE Price 8690 V y4 F Simplest reliable device available After line released hook retracts body unit leaving SMOOTH surface bottom aircraft No special attachments required N eight Y2 oz OTHER FOURMOST PRODUCTS 0491051 AIRFLO ENGINE MOUNT 40 AIRFLO ENGINE MOUNT IDEAL FOR GUICKY 500 PRICE $630 REDUCES DRAG VIBRATION FREE PRICE $300 Fuel Fitting Sets Fuel Shut Off Fuel Manifold Gaplese Hinges Gapless Hinge Slotter Strut Fairings Codcpit Coaming nd SASE Complete Information 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 NEW GLASS FILLED MOTOR MOUNTS 0405 1011 1519 2025 3035 4045 40451 5050 5070 195 225 235 245 265 275 300 325 325 OEM BULK INQUIRES INVITED Featuring LONG GLASS FILLED NYLON FOR STRENGTH AND STABILITY Alignment Lines Mounting Interchangeable Kraft Flat bottom nose gear SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 AREA CODE 513 738-1576 put Technopower radial stand out bipe dont let see giving airplane Warp 9 performance said Let float along Let poke slowly can retrieve running under grabbing Let change pace Bud may have gotten bit carried away indelible experi ence nearly 50 years ago 30-in rubber-powered SE-S Joe Ott design Bud added Youll guy field can zig should have zagged push should have pulled will have airplane gives him plenty time correct mistakes Itll model because does 1/1 scale Two worlds Fly power Fly wing both prithee Bud could speaking old-timers things fly wing goes far beyond old-timers Years ago people tired the wall-to-wall Pattern-type thing escaped RC Sailplanes must have noticed years heavy advertising popularity Flying wing antique fetish What airplane during its aerobatic routine wonderfully fulfilling letting air plane itself almost sheer beauty flight equally fulfilling gotta have power Sailplane has except gravity Zero displacement maybe should keep scrapbooks rainy days doesnt rain gentleman Dihedral Ave address omen never saw Bill Bell come-backer So thousands born-again readers special case course chose specialized beautiful Tom McCoys brilliant pursuit Old-Timers ap preciate Rubber Scaleas us whether fly themBills efforts merit resounding well done As kid during Thirties Bill built Scale models 10- 25- 50-cent kits Megow Comet etc did vast multitude 1980 interest stick-and-tissue birds rekindled discovery Golden Age Reproductions new kit models put out Joe Fitz gibbons Tom Schmitt takes memo rable pictures wanders provides delightful prints make report possible Suppose group few Bill Bells Rubber Scale ships captions does other things too bumped him once flying dream Stearman biplane Flyline Models kit engine lo behold other models old designs case AMA Museum highlights some misdeeds written Bill finishing Albatros D-5 garish streamlined fighting machines WW D-5 some reason makes stupendous flier view pictures way Scale guys will dreaming manner RC things including Giant Continued page 28 26 Model Aviation FCYANOACRYLATE List Sale Savings 1 oz Fast Cure 3-5 Sec 495 $2 500/0 Off 2 oz Fast Cure 3-5 Sec895$396560/0 Off 1 oz Gap-Filling 5 Sec495 $2 50% Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave San Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 408 251-0789 Out StateINFO 408 251-0787 California Hours Mon-Wed Fri & Sat 930-530 Thur 930-900 1200-500 Pronto Retail $3995 Super Pronto Retail $4995 HIGH QUALITY 48 SPAN KIT FOR 09 TO 25 ENGINES FEATURES low wing design high wing stability excellent inverted performance Gentle novice Expert versatile performance 4-6 hour rapid-fire assembly beginner Precision machine-cut SIG balsa plywood spruce Rolled full size plans showing complete wing Step-by-step instructions easy assembly Formed main landing gear Exceptional small field performance May flown ito 3 channels Tested recommended approved b RIO Modeler Magazine Model aviation July 84 Virginia residents add 40/o sales tax Playmate ready now 5 15 pan 50 2 4 cycle TIDEWATER HOBBY ENTERPRISES Route 1 Box 2410 Lanexa Virginia 23089 Lftj9i Phone 804 966-5092 Scale course Rubber Scale guys will go ga-ga little traveling music please . Nanjing China Warning rock slides ahead Set stage cast characters bit background like strange airplanes anybodys impossible novel ties Since violate no aerodynamic law notions airplanes must fly has narrowly rigid Among us little knowledge can dangerous thing Maybe its good challenge traditions live Virginia Im Missouri am open-minded least dozen things including cockeyed dihedral explanations Im far out flexible Ive never seen genuine proof synimetrical-airfoiled wing zero-zero setup cant maintain level flight being trimmed ele vated up down does see strange things however elemental truth am necessarily stupid Okay engineers know some lift must developed situations agree shakily disagree Now time-out introduce Joe Tschir gi writes hotel room opposite side globe Joe respected old-timer fa mous strange airplanes ortho dox Scale models beautiful fliers apt strange Some may re member things like German WW Brandenberg biplane flying boats really strange Scale bird its prop located aft wings conventional fuselage Play mechanics once member own club NVRC prior coming Virginia years ago involved pro fessionally drones stuff knows subject description out-of-control RC model reed Rookie December issue caught eye Joe begins some years Ive trying finish series articles stability control mod els Its natural endeavor since before retiring 18 months ago fooled people believing knew something about sub ject 35 years Anyway question good Pattern models need little no down trim level inverted flight has always bothered Since wife decided masquerade English teachers Nanjing Ive time think about problem believe now have answer Authors Note excellent technical discussions received column one-on-one basis because references mysterious things ob served fun theme best served avoiding esoteric deep stuff example pile brilliant papers pro con relating air ocean debate fills series large manila envelopes Some letters exceed length column making exception Joe Tschirgi hoped reader will drop out Continued page 139 28 Model Aviation DAVE ROBELENS PRONTO AAJfl IIPPR PRAAITA per oreer FAST SERVICE COD ADD $190 Letters Editor Continued page 12 Thus weve filed criminal complaint charges against guy shooting down airplanes flying through sky Its lengthy battle prosecute sin come down home stretch hope will win Now before leave office have recommendation state Lets finish up court case forget about hate Weve lived through three years prob lems some us its rough Lets get sport model avi ation weve suffered long enough Mike Barklow Appleton WI accompanying letter Mike said foregoing poem written 1983 stepping down president Valley Aero Modelers clubs newsletter notpri nted due suit progress Despite best efforts club lost flying field doldrums briefperiod maintaining positive attitude group able establish new flying site rebuild itself now bigger better ever very gratying to organization Mike notes Safety/Preston Continued page 20 about accident members havent heard heres story heard few weeks ago member friend out flying weather fairly cold member standing wing tip friends plane friend attempting start using standard electric starter plastic engagement cone Somehow engine started friend surprised starter slipped off spinner hit ground trigger still depressed strn spin ning plastic cone exploded sending fragments directions friend got small piece through part ear sliver hit member corner eye caine out again doctor says 50% chance will lose eye may have have cornea transplant incident tragic enough itself stop think what could have happened occurred field person hurt innocent bystander kid Weve got keep spectators children out pit area Friends not. comment incident repeat something Ive said several times previously consider pair safety glass es starting model working shop Have safe month John Preston 12235 Tildenwood Dr Rockville MD 20852 Plane Talk/Winter Continued page 28 things become bit sticky Some will understand presentation its entirety am fortunates can interpret comments virtue simple diagram no math Will prescription fly Ponder photo giant tailless Ugly Stik involves no trick airfoils Follow Joe end youll find other comments play Let assume perfectly symmetric aircraft argument Tschirgi warms up has symmetric airfoils both wing tail thrust line wing tail CG centerline has zero-zero incidence setup also assume fore-and-aft CG position such model trim level flight Since model perfectly symmetric pitch plane its obvious model will also fly straight level verted assumptions solu tion clear leaves another problem can such model trim angle attack except zero tricky part model symmetric angle attack airflow over Behind wing generating lift have downwash evidence vorticity shed wing Its strength centerline strong function aspect ratio normal model configurations downwash small function angle attack concentrated directly down stream model changes angle attack tail sweeps through region Generally results pitching moment curves nonlinear have reduced static stability near zero lift sym metric model assumed stabil izer center downwash field However CG far enough aft static stability can zero unstable region exhibiting positive static margins outside unstable point maximum downwash effect model will have two trim points symmetric model postulated would equal opposite sign lift coefficients best visualized referring illustration fact dynamic pressure re duced wings wake Joe goes also contributes non-linearity course reversal cannot exist unless static stability quite small tail out wakeie CG well aft brings up another interesting point models easy fly some cases easiest have little static Continued page 142 May1986 139 n ou sy SEE- HFE THE BOTTLE OF ZRPJET LEPKED FiND sNIcKE YOU TRIED TO SCRPTCH YOUR GIGGLEEP / 0 ZIin ZSOL 92 span 19-21 lbs $20995 Piper PA-17 Vagabond 84 span 10 lbs $15995 Super P11 92 span 19-21 lbs $18995 Chipahip 90 80 span 1/5 scale $12995 TalIwbeel Assemblies 3-8 lbs$1095 4-9 lbs$1295 10-l8lbs$1495 lOibsaup$1595 Manufacturers Softglass Fast Tape Fast Threads 1/4 Scale Pilots Plans construction models three large sheets eli parts shown full scale Weighs down construction bales plywood Models available F 84-F Thunderetreak Sabre F 100 Super Saber Fighting Falcon Eagle Mirage 2000 21 Fishbed i Blackbird F 104 Scarf ighter Fit types ducted fan units wheel 5 dia 40 80 engines Available also motor ducted fan unit sod canopy Price plan 5000 US dollars includes shipment air mail rolled tube Write free literature InformatIon G Bertella Via Matteotti 248 Gardone VT 25063 Brescia Italy 1981 World Soaring Champ DWIGHT HOLLEY FEATURES Sailplanes lous Electric Planes AS1IOFLIOHT e UNGE e 11113 MOICIS IN STOCK SANYO SANYO SANYOBattery Special NSOOAR Weigh 36 Grams Cut Oficells NEW Lower Price Red Jacket Cut Off cells N1200SCR Weigh 52 Grams $340 1200MAH Now 2 New Super Cells Sanyo N-900SC SCR Cut Off cells $375 Both weigh 39 Grams 3/4 length 1200s same dia N900SC will deliver least 950 MAH N900 SCR will deliver great amperage quickly oELECTRIC MODEL SAILPLANE SPECIALISTSHOLLEYS SILENT FLIGHT FEATURING ONLY STATE OF THE ART ITEMS 03 748-0083 LUCALL OR WRITE FOR FREE DESCRIPTIVE FLYER 151 CHESTNUT RIDGE RD BETHEL CT 06501 U MS SPEED CONTROLLERS e GRAUPNERe ASTROFLIGHT KELLER UNGER Plane Talk/Winter Continued page 139 stabilityat Static margins percent chord would dangerous full-scale aircraft Conventional models have dynam ic stability far excess full-scale aircraft because very low density fact believe modelsparticularly Pat tern RC duration power modelsare dead-beat fundamental pitch modes allows marginally-stable stat ically RC model easily flown Fur ther low static stability high dynamic stability required model going groove same qualities needed Free Flight models handle high powerbut another long story As might have gathered Im con vinced dynamic stability damping important primary factor suc cessful model design primary factor both pitch stability control both RC FF Power also major requirement spiral stability Free Flight models discussion has simplified assuming symmetric model same two-trim-point pitching moment curve possible asym metric model including cambered wing fact inclusion cambered wing may make easier achieve However explanation much involved since cambered airfoils pitching moment necessary ingredient two-static-trim-point mo ment curve certainly flyableI believe have done itI doubt total cause unusual incident Tschirgi continues believe Janomo lie would noticed corrected example bit down elevation fed level flight model would shift negative trim point stay trimmed elevator neu tralized CG assumed moment curve shifted bit forward un stable region would become flat very slightly stable double trim point would vanish very slight amount down elevator trim would make second trim point reappear believe typical condition RC model 0 0 0 0 Ce 0 2 0 Ce Ce m -l 0 2 Cit C F F grooves well remember reed servos fairly wide deadband neutral because use slide switch contacts Hence think model grooved well servo stopped downside deadband Au Eureka finally know Only once before has anyone offered respectful comment observation zero-zero symmetrical wing sometimes gives impression model can remain straight level control input observation flies face truth wing must generate lift hold such attitude Years ago asked Joe Wagner thought such setup could maintain straight level possible Joe replied sym metrical wing changing its angie attack between positive negative over small range trim its doing visible eye wonder now about Wagners ooncept invisible chang ing trim exists necessarily has two limitspositive negative note Tschirgis diagram need understand two trim points calls out shown intersections line labeled Angle Attack Zero Lift say wonder strange out-of-control flight Rookie occurred 1962 Control lost plane inverted overhead low altitude up-trim rolled inverted obviously no downtrim oould inputted inverted since control gone plane circled entire area maintaining constant altitude eventually arriving low overhead original headingat point control regained quick landing plane symmetrical Yo-/3 semi-symmetrical airfoil some angu lar difference some dihedral high thrust line design factors oom bined especially high thrust line low thrust line inverted help maintain impossible level flight probably could servo stopped side neutral Tschirgi said would impart unknowing slight down elevator trim dont forget Tschirgis analysis shows truly142 Model Aviation Ohio 11376 Ridgeway Rd Kensington OH 44427 216223-1950 1 Full Size Plans Ducied Fans 1 J C Trainers_ Wing 60 Size40 SemhSyme Size20 Size See local dealer call us location dealer nearest symmetrical model also could maintain straight level flight under same conditions eye old Rookie generating liftwhen fact lift present law states due strange confluence conditions aerodynamics beyond ken modelers Highly interesting fact modffied Rookie comes close will duplicate inverted phenomenon much heavier balanced one-third chord whereas original lighter CG 40% chord will have noted Joe Tschirgis references balance points balance 40% what new Rcokie surprises people fly its ability go inverted slightest urging remain inverted ease long periods steering such inverted Figure 8s additionally implies non-symmetrical craft kind disposition surfaces thrust line etc could fine-tuned maximize desired end product series de velopment Bats belfry know whats So whats Purple Plan mail brings mention some guys Purple Plan repairs finishing dusty frameworks hanging think AMA should have Purple Plan badge could wear proudlyor pin rear buddy cant get acttogether now alas probably 50% remember did see column year ago Purple Plan important tote keeps up well have rerun item Ive now applied flying keep saying Wait till next year next year field muddy early spring winds blow gets tco hot gets windy again too cold Once snow sleet fog no excuses October sometimes late September November later golden days Like Ba hamas wind III can get two perfect October days makes up year worthwhile make another plane two over months via Purple Plan flying career goes FLYS GREAT IDEAL BEGINNERS AIRPLANE THAT BUILDS IN HALF THE TIME Jig built balsa fuselage 90% Built wing Excellent instructions first time builder Full size plans Decal forms windshield JOHNNIE CASBURN MANUFACTURING CO 5115-SE E Rosedale Fort Worth TX 76112 Day 817/451-7537 t 817/572-1452 always another golden October modified Rookie Enya fourstroke 60 sat unpainted nearly year flies beautifully thrust torque its 14-6 8300-8500 awesome especi ally pulling through tight slowed up close-in aerobatics wont fly helper reminds crewing Giant Scale Aristocrat 18-6 prop 7000 rpm need two-hand hold remote glow plug battery connection must things would simpler years Ive requests plans Rosenstock see ads has plans early-1960s version youll able get plans new Model Builder before too long bought first kit cant believe Midways Dennyplane want build think aluminum-cowled round OldTimer has dream too years wood cutting first rate plans something else old-timer old-fashioned plan always some mistake few details doesnt matter since need lines pin down spars longerons etc plan certainly authentic mid-30s box has original Dennyplane labels picture Denny himselfwith goggles Typical day theres block listing guys drew traced whatever signed off including ol Reggie himself some other modem names No cross sections no rib patterns outline side view. s way Im delighted know fineflying ancient model actually looks like airplane took plunge because showed pictures Dennyplanes got me. may go first Sigs new Kaydet Senior big bird trainer bigger Eagle three channels lots openframe stuff fuselage once flew planes like 19s rudder-only control almost no elevatorsnot throttle have aileron jobs already know can enjoy floating around like bird soaring heavens isnt very windy Designer Claude McCullough has going back silk dope can Continued page 147 May1986143 CD CD 0 z 0 z 0 C/ 0 -u 0 -u m m 0 Q H CD n 0 0 C/ 0 C, 0 0 31 0 ThJ Lr N CD C, N x x x x x 01 x x x U Available NowThe New Breed Sachs/DolmarLightst weight hand start ready-to-mount engines market 31 $27500 34- $34500 37 $35500 42- $37500 Engines Complete Nothing Extra Buy Choice points 1SIba2z-SYaHP34-5Ibsftoz-65P37-SIhs4oz-CtaHP42-5Vjs3oi-7MP CDI IgnitionOption engines Throttle-coupled spark advance Features CustomIz newest German engines parts ler t ting Bolts sure Tap smoke Carburetor Linkage Ignition ICH Eiectronicsl Ignition Peck ty Switch lt Hub stor Spk Pigs Warranty Fauity Parts Workmanship T G Mfg 857 High Mountain Rd North Haiedon NJ 07508 e 201 427-3845 Plane Talk/Winter Continued page 143 enjoy does will use spoilers see article February issue plan new wrinkle hate install ailerons tape Bill Evans now AMA Museumcompany demo Slow Motion Electric Astro 25 14 cells 12 Ah capacity conned Bill roaring success direct driveaerobatics plus soaring over hour high-speed inverted flybys got five-year-old kid fly attention wanderedyou could see him watching other airplanes Yet Slow Motion sailing wide circles wide open piped 60 Desperado Evans hates stabilizers Des perado published April 1984 issue magazine has cathedral huge towering tail Stable rock course does what consider fearful high-speed aerobatics film paused ask wanted 60-powered Desperado subscribe old-fashioned explanation dihedral works plane could fly would nearly unflyable tractable Slow Motion published MA Ive told Bill could spec version match SloMo fine now has picture Dasher 60and like am willing tackle 60 Dasher max 40 power What am saying Actually Id feel good hot 25but am double-dared 74 tape showed Giant Scale CAPso pretty Look close gosh no stabilizer flights tape better what can stab Its called T-CAP slowed-up tendencies CAP stall vanished stab Slow slow fly bys tips quivering Yes hot Tschirgis crazy giant tailless Stik wonders bother making boring tail surfaces Airfoils CG locations make possible things see Thank Lord Purple Plan golden Octobers Bill Winter 4432 Altura Ct Fairfax VA 22030 Can talk ask pictures returned accompanying envelope obviously cannot use wonderful things Dont have negatives making prints ones send wont priceless Others would like see please include stamped pre-addressed envelopes least stamp Try use influence postman wont ask excess postage responding advertIsers mentIon read aboutthem ModelAviation Radio Technique/Myers Continued page 43 utor Salt Lake City area fourchannel two-stick 75 MHz radios stock time said Go ahead wont make difference also talked established hobby shop owner nearby village told RC airplanes dont sell around cant keep enough off-road RC cars stock first radio went back distributor its easy see retailers arent bad guys situation hope see suggested Bob Aberle back 1982 fre quencies divided mentioned again column June 85 discussed AMA Frequency Committee meeting November 85 reiterated John Prestons column April 86 issue wit Weve got get manufac turers permanently mark 75MHz radios use aircraft 72 MHz radios Aircraft Only right factory markings arent permanent arent put factory wont have effect probably wont happen until 1988 shared channels go away think ought put some effort making happen Ive really buried letters Please Introducing. irekIIn RIC Idle-Bar Glow Plugs Long Short Also.Only $169 Traditional line non-idle bar Glow Plugs a Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $129 Swanson Associates PO Box 151 Wayne NJS948 07470 m Custom Built Models 2036 N Thorn Ave Fresco CA 93704 em 6 pmOrder Phone 209 233-1050ask Bill If you LOVE fly HATE build Contact e solution probleml Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc - IF1yWhatIBuu1d May1986 147 lie Koush Laser Kit TG Reg $24995 hardware -$27995 SYNTHETIC LUBRICANTS CASTOR LUBRICANTS POWER ADDITIVES FREE CATALOG INcODUCT INFOTIPS UDES~ 800-242-0489 777 j3#7 Pt Box 11343 154tt57 219-749-1489
Edition: Model Aviation - 1986/05
Page Numbers: 22, 23, 24, 25, 26, 28, 139, 142, 143, 147
Bill Winter 0 Plane Talk THEY SAY can tell man books tell fellows largely kinds models build fly Before column sets sail three-yearjourney search Great White Whale owe landmark Resisting impulse explore Mice-in-Wonderland science preparing competition Scale documentation cal culated science thought-controlling judges show em everything show em nuttin known documentation done its own sake can become book book about Albatrossthe double S tells about Scale Albatros 5 WW German fighter Things such grow like ivy Lets begin Tom McCoy picture Lanzos RC-l radio job 1934 appeared column three months ago Aware McCoy old buddy Chet Lanzo asked both photos background resulted threeview Chets exciting photos presented two months back During 1980 bull session Chet men tioned drawing plans forgotten wun derkind remark went over Toms head until saw Chet fly pretty bird SAM Champs Westover AFB 1982 supposes knew what looking subsequent meet Cleveland Tom realized earliest-ever RC jobs Chet gave him plans romance RC-l began happened Toms photos RC-l arrived docu mentation book Albatross did color shots stable superbly-built OldTimers Antiques exquisite Tom demon competitior well 1984 alone compressed-air King Burd took first SAM Champs RC-1 won another Michigan State Champs DRCC OldTimer still another RC Old-Timer Detroit Expo second OldTimer Toledo Lanzo Bomber OldTimer won first MRCA Show second Detroit RC contest third New York State Championships Building 38 years Tom joined AMA Detroit Balsa Bugs 12 1952 Junior AMA Champion winning Cooper Brothers Trophy Indoor Rubber 19 flew first RC Berkeley Cavalier Citizen ship 465 equipment Having published first license free RC plans ever MAN 40s using pre-production sample radio can attest 19-yearLeft Tom McCoy Lanzo Bomber RC first 1983 Toledo Show Tom favors natural yellow silk variations trademark color schemes consisting blue black trim often white striping set things off Above Compressed air King Burd atthe 1982 MichIgan State Meet boxy Robin-like modeiwon boththeSAM Champsand MiniChamps Ribs narrowtips wing tail holed forlightness Winterwonders abouta 1 0-1 5 gasfor oran electric motorforhigh-time duration over 40 wins golden oldies mostly firsts seconds Tom McCoys virtual museum pieces show little no sign strenuous competitions show seven examples selected Toms scrapbook really much like Scale documentation book Leading off Albatross design George Reich really turns Winter 80-In semi-cabin design competitive pylon ships Toms model first Dennymite engine now has ignition Super Cyclone piece wood carefully selected holes cut ribs forextra lightness plus lightweight silk covering clear dope finish keeps wing loading 8 oz per sq ft FF 10 RCI Has thick high-lift wing high thrust line shock gearprecisely like original old guy like Tom managed 465 project survivor Alamo Tom founder Detroit RC Club 29 years ago origi nators Toledo RC Exposition also versatile enough have won second Michigan State Meet Lacy 10 M Peanut During 1980s Torns oldies have taken 39 high places Toms documentation time-trip book Tie string around finger. have luck Irish seeing legendary fliers make great flights Lew Mahieu Dooling 29 tiny Zeek Joe Konefes 44-min Bombshell Chicago Roy Nelder launching Moffett winner Copland Jim Cahill Wakefield-winning Clodhopper Wris ton Dague Carl Goldberg diamond Zipper Interceptor Sailplane Valkyrie Cumulus Gordon Light Lanzos Bomber RCs big Puss Moth flew like Mulvihill Kovel KG Bassett talring Eastern States So-Long Elgin Playboy timed Kordas mighty Wakefield flight Aldrich Nobler Yates Madman Palmer often Saftig Zilch 445-pm shoot-outs Speed Walker Goods Kasmirski Orion Bon ner Smog Hog ff1 sat down sky fell Weird So watched among others George Reich Albatross left lifetime impression least 30 years no seemed notice Ive looked plans times published designed 1940 Air Trails Reich two-time Wakefield team mem ber once winning fabled cup Dick Kordas brother-in-law another Cleveland band immortals still builds flies oldies SAM stuff Albatross discovered bang Pylon Free Flight models ruled iron hand good 20 yearsthey alone could handle high power witness modern Satellite Yet like Konefes Reich went cabin design George secret side profile gave high wing like pylon high thrust line made fly like postwar 1950-1960 high-thrust pylons could climb safely dead ahead bored holes sky combi nation Albatross ideal now super-stable loafing around RC assist Old-Timer bag Oddly has lifting-type tail CG one-third wing chord supposes Astro cobalt geared 40 16 cells would get high enough 12 min Electric McCoys book full surprises sort modeling family bible Only notebook gee er featuring Alba tross Xerox some art directors work Id guess alone makes unique page encased protective plastic begins simply pageeverything throughout neatly typedcalled Old-Timer RC Mod el tabulated vital specs flip side against black background old magazine clipped photo guys room 1939 Nats Reich Elgin Korda McCoy others Another page describes original Alabatross along color photo Reich 1982 Lanzo Bomber Thats followed entire construction feature 1941 Air Trails two pages entitled Model Virtually page includes some old clipping involved old-timers relevant models page about engine quote tells work good read Super Cyclone 60 gift old friend Harvey Thomasian Worster MA Harvey old-time engine man particularly famous customtuned K&B engines during late 1 950s early 1 960s Harvey has large collec tion old ignition engines Cy clone certainly beautiful Although Left Toms model very popularTaibi Powerhouse placed second 1983 MIchigan State Old-TimerContest models shown have won other places Right First place Toledo 1982 went Toms rendition Maurice Schoenbruns Gladiator Like other Schoenbruns classics distinguished ample area deep belly high thrust line long tall moment Another cabin model Left Another Lanzo design Record Breaker isa functional parasol nice lines shot Danny Sheelds Americas unofficial Old-Timer goodwill ambassador British events Right Berkeleys Buccaneeretili built great numbers Heres Tom rendition 19308 classic Thanks early RC efforts Joe Raspante design also authentic RC Old-Timer Joeswasa monstrous size May1986 23 Stinson SR-S Megow followed about cowl bumps Winter says did bigger 1934-35 Flying Aces built sizes up 45-in span Bell relates bittrickyto adjust poor glide after power ran out glide improved after wear tear patches previously-siickwing Winter launching Rearwin Speedster indoor Scale meet Bill Bell says Speedster notes cheated Rubber first new models 1980 Once kitted Peerless 24-in-span design Scale designs generous tail area insomewhat beefed up still good flier indoors out Bell photos Tom Schmitt creases Made em fly much better says Left Pleet Trainer another Peerless two profile pilots impressive radial engine nose plug being readied winding stooge second Bell project required dihedral top wing good flight fuil-scale ship nonewhich would fine RC Right Caimly Bell gets off perfect two-hand launch dainty bipe Model has flying wires although cant seen plc its looks may fool new engine well broken-in pleasantly surprised find will turn 8500 rpm 14-4 Tis small world Harvey buddy Hal deBolts roughly 30 years ago published Live Wire-type plane Harvey trike gear Just lately during -scale Vagabond project supplied photos full-scale red-and-white Vag Just today same photos much other documentation sent HA Thomas similar project friend Hartsfield Little Rock Thomas McCoys book turns Propeller Tom says flatly present-day props unsuitable old ignition engines simi larly can tell traditional props best four-stroke engines no 3-in pitches FF useful prop case TF 11-4 has wrong blade shape lower ignition rpms Tom tells us may have heard low-wing Spartan did know also cabin version Bells third project once Comet kit Bill says its often mistaken fora Stinson Note ring cowl circa 1930 struts Neat two-hand launch Bill uses smooth fluid 24 Model Aviation Left Flying through skies Ninjing China Joe Tschirgis Short Stik tailless shortened Giant Stik currently powered 2500cc Supertigre Waibo pumpercarb No trick airfoil elevons widened Does nice wingovers buttall makes crosswind taxiing pain Text detalis Tachirgis expianation symmetrical wing standard zero-zero conventional piane may appearto fly level trim kind Refer diagram below follow discussion Right Can beileve Its Joe Tschirgl Stik its derived Bill Evans tailless technoiogy Older CL Combat fliers may remember Nobody design almost identical approach book has stuff reworking props Lost Ark data coming 1940 Air Age Annual Air Age corporate name MANs publisherbut doubt MAN annual 1940 whereas Air Trails did Thomas article certainly needs republishing Replete wonderful draw ings about methods obtaining truepitch prop includes blade top side profiles 14-8 probably would make Enya 60 four-stroke run like blue blazes Suffice say McCoy constantly pressured great props various hands have impres sive win record INVERTED TRIM PITCHING MOMENT ABLE REGION ANGLE OF ATrACK 4- FROM ZERO LIFT UPRIGHT TRIM POINT s new modeis foiiowed Taylor Cub Peerless Cessna C34 neither shown 24-in Taylor best lot though beefed up Beli states almost lost number times Above Aftera Fokker 0-Vil Scientific made tight turns fine glide good fiying indoors Bill built very beautifui Douglas Vi 0-43 Comet shown two views iost powerfui thermai 1984 now has repiacementversion forflying indoors Below Nicelydetailed resplendent Navy colors Beils F4B-4 American Modeicraft big use indoors waiting forgood outdoorweather Pianetakes six strands Ia-in rubber one-third Toms book states following section presen tation personal about mod els Thats beyond reporting talents Color pictures galore red blue yellow win ribbons Reports various major SAM meets can select some photos Toms models run descriptive captions ways fly alas horde newcomers may never discover before run course Bud Davisson gifted pilot word-maker does the Cockpit series MAN talked Command Air cover January 1986 MAN put extremely well urged Giant Scalers Continued page 26 May198625 Winning Ideas FOURMOST RETRACTABLE iTOWHOOKRELEASE Price 8690 V y4 F Simplest reliable device available After line released hook retracts body unit leaving SMOOTH surface bottom aircraft No special attachments required N eight Y2 oz OTHER FOURMOST PRODUCTS 0491051 AIRFLO ENGINE MOUNT 40 AIRFLO ENGINE MOUNT IDEAL FOR GUICKY 500 PRICE $630 REDUCES DRAG VIBRATION FREE PRICE $300 Fuel Fitting Sets Fuel Shut Off Fuel Manifold Gaplese Hinges Gapless Hinge Slotter Strut Fairings Codcpit Coaming nd SASE Complete Information 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 NEW GLASS FILLED MOTOR MOUNTS 0405 1011 1519 2025 3035 4045 40451 5050 5070 195 225 235 245 265 275 300 325 325 OEM BULK INQUIRES INVITED Featuring LONG GLASS FILLED NYLON FOR STRENGTH AND STABILITY Alignment Lines Mounting Interchangeable Kraft Flat bottom nose gear SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 AREA CODE 513 738-1576 put Technopower radial stand out bipe dont let see giving airplane Warp 9 performance said Let float along Let poke slowly can retrieve running under grabbing Let change pace Bud may have gotten bit carried away indelible experi ence nearly 50 years ago 30-in rubber-powered SE-S Joe Ott design Bud added Youll guy field can zig should have zagged push should have pulled will have airplane gives him plenty time correct mistakes Itll model because does 1/1 scale Two worlds Fly power Fly wing both prithee Bud could speaking old-timers things fly wing goes far beyond old-timers Years ago people tired the wall-to-wall Pattern-type thing escaped RC Sailplanes must have noticed years heavy advertising popularity Flying wing antique fetish What airplane during its aerobatic routine wonderfully fulfilling letting air plane itself almost sheer beauty flight equally fulfilling gotta have power Sailplane has except gravity Zero displacement maybe should keep scrapbooks rainy days doesnt rain gentleman Dihedral Ave address omen never saw Bill Bell come-backer So thousands born-again readers special case course chose specialized beautiful Tom McCoys brilliant pursuit Old-Timers ap preciate Rubber Scaleas us whether fly themBills efforts merit resounding well done As kid during Thirties Bill built Scale models 10- 25- 50-cent kits Megow Comet etc did vast multitude 1980 interest stick-and-tissue birds rekindled discovery Golden Age Reproductions new kit models put out Joe Fitz gibbons Tom Schmitt takes memo rable pictures wanders provides delightful prints make report possible Suppose group few Bill Bells Rubber Scale ships captions does other things too bumped him once flying dream Stearman biplane Flyline Models kit engine lo behold other models old designs case AMA Museum highlights some misdeeds written Bill finishing Albatros D-5 garish streamlined fighting machines WW D-5 some reason makes stupendous flier view pictures way Scale guys will dreaming manner RC things including Giant Continued page 28 26 Model Aviation FCYANOACRYLATE List Sale Savings 1 oz Fast Cure 3-5 Sec 495 $2 500/0 Off 2 oz Fast Cure 3-5 Sec895$396560/0 Off 1 oz Gap-Filling 5 Sec495 $2 50% Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave San Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 408 251-0789 Out StateINFO 408 251-0787 California Hours Mon-Wed Fri & Sat 930-530 Thur 930-900 1200-500 Pronto Retail $3995 Super Pronto Retail $4995 HIGH QUALITY 48 SPAN KIT FOR 09 TO 25 ENGINES FEATURES low wing design high wing stability excellent inverted performance Gentle novice Expert versatile performance 4-6 hour rapid-fire assembly beginner Precision machine-cut SIG balsa plywood spruce Rolled full size plans showing complete wing Step-by-step instructions easy assembly Formed main landing gear Exceptional small field performance May flown ito 3 channels Tested recommended approved b RIO Modeler Magazine Model aviation July 84 Virginia residents add 40/o sales tax Playmate ready now 5 15 pan 50 2 4 cycle TIDEWATER HOBBY ENTERPRISES Route 1 Box 2410 Lanexa Virginia 23089 Lftj9i Phone 804 966-5092 Scale course Rubber Scale guys will go ga-ga little traveling music please . Nanjing China Warning rock slides ahead Set stage cast characters bit background like strange airplanes anybodys impossible novel ties Since violate no aerodynamic law notions airplanes must fly has narrowly rigid Among us little knowledge can dangerous thing Maybe its good challenge traditions live Virginia Im Missouri am open-minded least dozen things including cockeyed dihedral explanations Im far out flexible Ive never seen genuine proof synimetrical-airfoiled wing zero-zero setup cant maintain level flight being trimmed ele vated up down does see strange things however elemental truth am necessarily stupid Okay engineers know some lift must developed situations agree shakily disagree Now time-out introduce Joe Tschir gi writes hotel room opposite side globe Joe respected old-timer fa mous strange airplanes ortho dox Scale models beautiful fliers apt strange Some may re member things like German WW Brandenberg biplane flying boats really strange Scale bird its prop located aft wings conventional fuselage Play mechanics once member own club NVRC prior coming Virginia years ago involved pro fessionally drones stuff knows subject description out-of-control RC model reed Rookie December issue caught eye Joe begins some years Ive trying finish series articles stability control mod els Its natural endeavor since before retiring 18 months ago fooled people believing knew something about sub ject 35 years Anyway question good Pattern models need little no down trim level inverted flight has always bothered Since wife decided masquerade English teachers Nanjing Ive time think about problem believe now have answer Authors Note excellent technical discussions received column one-on-one basis because references mysterious things ob served fun theme best served avoiding esoteric deep stuff example pile brilliant papers pro con relating air ocean debate fills series large manila envelopes Some letters exceed length column making exception Joe Tschirgi hoped reader will drop out Continued page 139 28 Model Aviation DAVE ROBELENS PRONTO AAJfl IIPPR PRAAITA per oreer FAST SERVICE COD ADD $190 Letters Editor Continued page 12 Thus weve filed criminal complaint charges against guy shooting down airplanes flying through sky Its lengthy battle prosecute sin come down home stretch hope will win Now before leave office have recommendation state Lets finish up court case forget about hate Weve lived through three years prob lems some us its rough Lets get sport model avi ation weve suffered long enough Mike Barklow Appleton WI accompanying letter Mike said foregoing poem written 1983 stepping down president Valley Aero Modelers clubs newsletter notpri nted due suit progress Despite best efforts club lost flying field doldrums briefperiod maintaining positive attitude group able establish new flying site rebuild itself now bigger better ever very gratying to organization Mike notes Safety/Preston Continued page 20 about accident members havent heard heres story heard few weeks ago member friend out flying weather fairly cold member standing wing tip friends plane friend attempting start using standard electric starter plastic engagement cone Somehow engine started friend surprised starter slipped off spinner hit ground trigger still depressed strn spin ning plastic cone exploded sending fragments directions friend got small piece through part ear sliver hit member corner eye caine out again doctor says 50% chance will lose eye may have have cornea transplant incident tragic enough itself stop think what could have happened occurred field person hurt innocent bystander kid Weve got keep spectators children out pit area Friends not. comment incident repeat something Ive said several times previously consider pair safety glass es starting model working shop Have safe month John Preston 12235 Tildenwood Dr Rockville MD 20852 Plane Talk/Winter Continued page 28 things become bit sticky Some will understand presentation its entirety am fortunates can interpret comments virtue simple diagram no math Will prescription fly Ponder photo giant tailless Ugly Stik involves no trick airfoils Follow Joe end youll find other comments play Let assume perfectly symmetric aircraft argument Tschirgi warms up has symmetric airfoils both wing tail thrust line wing tail CG centerline has zero-zero incidence setup also assume fore-and-aft CG position such model trim level flight Since model perfectly symmetric pitch plane its obvious model will also fly straight level verted assumptions solu tion clear leaves another problem can such model trim angle attack except zero tricky part model symmetric angle attack airflow over Behind wing generating lift have downwash evidence vorticity shed wing Its strength centerline strong function aspect ratio normal model configurations downwash small function angle attack concentrated directly down stream model changes angle attack tail sweeps through region Generally results pitching moment curves nonlinear have reduced static stability near zero lift sym metric model assumed stabil izer center downwash field However CG far enough aft static stability can zero unstable region exhibiting positive static margins outside unstable point maximum downwash effect model will have two trim points symmetric model postulated would equal opposite sign lift coefficients best visualized referring illustration fact dynamic pressure re duced wings wake Joe goes also contributes non-linearity course reversal cannot exist unless static stability quite small tail out wakeie CG well aft brings up another interesting point models easy fly some cases easiest have little static Continued page 142 May1986 139 n ou sy SEE- HFE THE BOTTLE OF ZRPJET LEPKED FiND sNIcKE YOU TRIED TO SCRPTCH YOUR GIGGLEEP / 0 ZIin ZSOL 92 span 19-21 lbs $20995 Piper PA-17 Vagabond 84 span 10 lbs $15995 Super P11 92 span 19-21 lbs $18995 Chipahip 90 80 span 1/5 scale $12995 TalIwbeel Assemblies 3-8 lbs$1095 4-9 lbs$1295 10-l8lbs$1495 lOibsaup$1595 Manufacturers Softglass Fast Tape Fast Threads 1/4 Scale Pilots Plans construction models three large sheets eli parts shown full scale Weighs down construction bales plywood Models available F 84-F Thunderetreak Sabre F 100 Super Saber Fighting Falcon Eagle Mirage 2000 21 Fishbed i Blackbird F 104 Scarf ighter Fit types ducted fan units wheel 5 dia 40 80 engines Available also motor ducted fan unit sod canopy Price plan 5000 US dollars includes shipment air mail rolled tube Write free literature InformatIon G Bertella Via Matteotti 248 Gardone VT 25063 Brescia Italy 1981 World Soaring Champ DWIGHT HOLLEY FEATURES Sailplanes lous Electric Planes AS1IOFLIOHT e UNGE e 11113 MOICIS IN STOCK SANYO SANYO SANYOBattery Special NSOOAR Weigh 36 Grams Cut Oficells NEW Lower Price Red Jacket Cut Off cells N1200SCR Weigh 52 Grams $340 1200MAH Now 2 New Super Cells Sanyo N-900SC SCR Cut Off cells $375 Both weigh 39 Grams 3/4 length 1200s same dia N900SC will deliver least 950 MAH N900 SCR will deliver great amperage quickly oELECTRIC MODEL SAILPLANE SPECIALISTSHOLLEYS SILENT FLIGHT FEATURING ONLY STATE OF THE ART ITEMS 03 748-0083 LUCALL OR WRITE FOR FREE DESCRIPTIVE FLYER 151 CHESTNUT RIDGE RD BETHEL CT 06501 U MS SPEED CONTROLLERS e GRAUPNERe ASTROFLIGHT KELLER UNGER Plane Talk/Winter Continued page 139 stabilityat Static margins percent chord would dangerous full-scale aircraft Conventional models have dynam ic stability far excess full-scale aircraft because very low density fact believe modelsparticularly Pat tern RC duration power modelsare dead-beat fundamental pitch modes allows marginally-stable stat ically RC model easily flown Fur ther low static stability high dynamic stability required model going groove same qualities needed Free Flight models handle high powerbut another long story As might have gathered Im con vinced dynamic stability damping important primary factor suc cessful model design primary factor both pitch stability control both RC FF Power also major requirement spiral stability Free Flight models discussion has simplified assuming symmetric model same two-trim-point pitching moment curve possible asym metric model including cambered wing fact inclusion cambered wing may make easier achieve However explanation much involved since cambered airfoils pitching moment necessary ingredient two-static-trim-point mo ment curve certainly flyableI believe have done itI doubt total cause unusual incident Tschirgi continues believe Janomo lie would noticed corrected example bit down elevation fed level flight model would shift negative trim point stay trimmed elevator neu tralized CG assumed moment curve shifted bit forward un stable region would become flat very slightly stable double trim point would vanish very slight amount down elevator trim would make second trim point reappear believe typical condition RC model 0 0 0 0 Ce 0 2 0 Ce Ce m -l 0 2 Cit C F F grooves well remember reed servos fairly wide deadband neutral because use slide switch contacts Hence think model grooved well servo stopped downside deadband Au Eureka finally know Only once before has anyone offered respectful comment observation zero-zero symmetrical wing sometimes gives impression model can remain straight level control input observation flies face truth wing must generate lift hold such attitude Years ago asked Joe Wagner thought such setup could maintain straight level possible Joe replied sym metrical wing changing its angie attack between positive negative over small range trim its doing visible eye wonder now about Wagners ooncept invisible chang ing trim exists necessarily has two limitspositive negative note Tschirgis diagram need understand two trim points calls out shown intersections line labeled Angle Attack Zero Lift say wonder strange out-of-control flight Rookie occurred 1962 Control lost plane inverted overhead low altitude up-trim rolled inverted obviously no downtrim oould inputted inverted since control gone plane circled entire area maintaining constant altitude eventually arriving low overhead original headingat point control regained quick landing plane symmetrical Yo-/3 semi-symmetrical airfoil some angu lar difference some dihedral high thrust line design factors oom bined especially high thrust line low thrust line inverted help maintain impossible level flight probably could servo stopped side neutral Tschirgi said would impart unknowing slight down elevator trim dont forget Tschirgis analysis shows truly142 Model Aviation Ohio 11376 Ridgeway Rd Kensington OH 44427 216223-1950 1 Full Size Plans Ducied Fans 1 J C Trainers_ Wing 60 Size40 SemhSyme Size20 Size See local dealer call us location dealer nearest symmetrical model also could maintain straight level flight under same conditions eye old Rookie generating liftwhen fact lift present law states due strange confluence conditions aerodynamics beyond ken modelers Highly interesting fact modffied Rookie comes close will duplicate inverted phenomenon much heavier balanced one-third chord whereas original lighter CG 40% chord will have noted Joe Tschirgis references balance points balance 40% what new Rcokie surprises people fly its ability go inverted slightest urging remain inverted ease long periods steering such inverted Figure 8s additionally implies non-symmetrical craft kind disposition surfaces thrust line etc could fine-tuned maximize desired end product series de velopment Bats belfry know whats So whats Purple Plan mail brings mention some guys Purple Plan repairs finishing dusty frameworks hanging think AMA should have Purple Plan badge could wear proudlyor pin rear buddy cant get acttogether now alas probably 50% remember did see column year ago Purple Plan important tote keeps up well have rerun item Ive now applied flying keep saying Wait till next year next year field muddy early spring winds blow gets tco hot gets windy again too cold Once snow sleet fog no excuses October sometimes late September November later golden days Like Ba hamas wind III can get two perfect October days makes up year worthwhile make another plane two over months via Purple Plan flying career goes FLYS GREAT IDEAL BEGINNERS AIRPLANE THAT BUILDS IN HALF THE TIME Jig built balsa fuselage 90% Built wing Excellent instructions first time builder Full size plans Decal forms windshield JOHNNIE CASBURN MANUFACTURING CO 5115-SE E Rosedale Fort Worth TX 76112 Day 817/451-7537 t 817/572-1452 always another golden October modified Rookie Enya fourstroke 60 sat unpainted nearly year flies beautifully thrust torque its 14-6 8300-8500 awesome especi ally pulling through tight slowed up close-in aerobatics wont fly helper reminds crewing Giant Scale Aristocrat 18-6 prop 7000 rpm need two-hand hold remote glow plug battery connection must things would simpler years Ive requests plans Rosenstock see ads has plans early-1960s version youll able get plans new Model Builder before too long bought first kit cant believe Midways Dennyplane want build think aluminum-cowled round OldTimer has dream too years wood cutting first rate plans something else old-timer old-fashioned plan always some mistake few details doesnt matter since need lines pin down spars longerons etc plan certainly authentic mid-30s box has original Dennyplane labels picture Denny himselfwith goggles Typical day theres block listing guys drew traced whatever signed off including ol Reggie himself some other modem names No cross sections no rib patterns outline side view. s way Im delighted know fineflying ancient model actually looks like airplane took plunge because showed pictures Dennyplanes got me. may go first Sigs new Kaydet Senior big bird trainer bigger Eagle three channels lots openframe stuff fuselage once flew planes like 19s rudder-only control almost no elevatorsnot throttle have aileron jobs already know can enjoy floating around like bird soaring heavens isnt very windy Designer Claude McCullough has going back silk dope can Continued page 147 May1986143 CD CD 0 z 0 z 0 C/ 0 -u 0 -u m m 0 Q H CD n 0 0 C/ 0 C, 0 0 31 0 ThJ Lr N CD C, N x x x x x 01 x x x U Available NowThe New Breed Sachs/DolmarLightst weight hand start ready-to-mount engines market 31 $27500 34- $34500 37 $35500 42- $37500 Engines Complete Nothing Extra Buy Choice points 1SIba2z-SYaHP34-5Ibsftoz-65P37-SIhs4oz-CtaHP42-5Vjs3oi-7MP CDI IgnitionOption engines Throttle-coupled spark advance Features CustomIz newest German engines parts ler t ting Bolts sure Tap smoke Carburetor Linkage Ignition ICH Eiectronicsl Ignition Peck ty Switch lt Hub stor Spk Pigs Warranty Fauity Parts Workmanship T G Mfg 857 High Mountain Rd North Haiedon NJ 07508 e 201 427-3845 Plane Talk/Winter Continued page 143 enjoy does will use spoilers see article February issue plan new wrinkle hate install ailerons tape Bill Evans now AMA Museumcompany demo Slow Motion Electric Astro 25 14 cells 12 Ah capacity conned Bill roaring success direct driveaerobatics plus soaring over hour high-speed inverted flybys got five-year-old kid fly attention wanderedyou could see him watching other airplanes Yet Slow Motion sailing wide circles wide open piped 60 Desperado Evans hates stabilizers Des perado published April 1984 issue magazine has cathedral huge towering tail Stable rock course does what consider fearful high-speed aerobatics film paused ask wanted 60-powered Desperado subscribe old-fashioned explanation dihedral works plane could fly would nearly unflyable tractable Slow Motion published MA Ive told Bill could spec version match SloMo fine now has picture Dasher 60and like am willing tackle 60 Dasher max 40 power What am saying Actually Id feel good hot 25but am double-dared 74 tape showed Giant Scale CAPso pretty Look close gosh no stabilizer flights tape better what can stab Its called T-CAP slowed-up tendencies CAP stall vanished stab Slow slow fly bys tips quivering Yes hot Tschirgis crazy giant tailless Stik wonders bother making boring tail surfaces Airfoils CG locations make possible things see Thank Lord Purple Plan golden Octobers Bill Winter 4432 Altura Ct Fairfax VA 22030 Can talk ask pictures returned accompanying envelope obviously cannot use wonderful things Dont have negatives making prints ones send wont priceless Others would like see please include stamped pre-addressed envelopes least stamp Try use influence postman wont ask excess postage responding advertIsers mentIon read aboutthem ModelAviation Radio Technique/Myers Continued page 43 utor Salt Lake City area fourchannel two-stick 75 MHz radios stock time said Go ahead wont make difference also talked established hobby shop owner nearby village told RC airplanes dont sell around cant keep enough off-road RC cars stock first radio went back distributor its easy see retailers arent bad guys situation hope see suggested Bob Aberle back 1982 fre quencies divided mentioned again column June 85 discussed AMA Frequency Committee meeting November 85 reiterated John Prestons column April 86 issue wit Weve got get manufac turers permanently mark 75MHz radios use aircraft 72 MHz radios Aircraft Only right factory markings arent permanent arent put factory wont have effect probably wont happen until 1988 shared channels go away think ought put some effort making happen Ive really buried letters Please Introducing. irekIIn RIC Idle-Bar Glow Plugs Long Short Also.Only $169 Traditional line non-idle bar Glow Plugs a Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $129 Swanson Associates PO Box 151 Wayne NJS948 07470 m Custom Built Models 2036 N Thorn Ave Fresco CA 93704 em 6 pmOrder Phone 209 233-1050ask Bill If you LOVE fly HATE build Contact e solution probleml Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc - IF1yWhatIBuu1d May1986 147 lie Koush Laser Kit TG Reg $24995 hardware -$27995 SYNTHETIC LUBRICANTS CASTOR LUBRICANTS POWER ADDITIVES FREE CATALOG INcODUCT INFOTIPS UDES~ 800-242-0489 777 j3#7 Pt Box 11343 154tt57 219-749-1489
Edition: Model Aviation - 1986/05
Page Numbers: 22, 23, 24, 25, 26, 28, 139, 142, 143, 147
Bill Winter 0 Plane Talk THEY SAY can tell man books tell fellows largely kinds models build fly Before column sets sail three-yearjourney search Great White Whale owe landmark Resisting impulse explore Mice-in-Wonderland science preparing competition Scale documentation cal culated science thought-controlling judges show em everything show em nuttin known documentation done its own sake can become book book about Albatrossthe double S tells about Scale Albatros 5 WW German fighter Things such grow like ivy Lets begin Tom McCoy picture Lanzos RC-l radio job 1934 appeared column three months ago Aware McCoy old buddy Chet Lanzo asked both photos background resulted threeview Chets exciting photos presented two months back During 1980 bull session Chet men tioned drawing plans forgotten wun derkind remark went over Toms head until saw Chet fly pretty bird SAM Champs Westover AFB 1982 supposes knew what looking subsequent meet Cleveland Tom realized earliest-ever RC jobs Chet gave him plans romance RC-l began happened Toms photos RC-l arrived docu mentation book Albatross did color shots stable superbly-built OldTimers Antiques exquisite Tom demon competitior well 1984 alone compressed-air King Burd took first SAM Champs RC-1 won another Michigan State Champs DRCC OldTimer still another RC Old-Timer Detroit Expo second OldTimer Toledo Lanzo Bomber OldTimer won first MRCA Show second Detroit RC contest third New York State Championships Building 38 years Tom joined AMA Detroit Balsa Bugs 12 1952 Junior AMA Champion winning Cooper Brothers Trophy Indoor Rubber 19 flew first RC Berkeley Cavalier Citizen ship 465 equipment Having published first license free RC plans ever MAN 40s using pre-production sample radio can attest 19-yearLeft Tom McCoy Lanzo Bomber RC first 1983 Toledo Show Tom favors natural yellow silk variations trademark color schemes consisting blue black trim often white striping set things off Above Compressed air King Burd atthe 1982 MichIgan State Meet boxy Robin-like modeiwon boththeSAM Champsand MiniChamps Ribs narrowtips wing tail holed forlightness Winterwonders abouta 1 0-1 5 gasfor oran electric motorforhigh-time duration over 40 wins golden oldies mostly firsts seconds Tom McCoys virtual museum pieces show little no sign strenuous competitions show seven examples selected Toms scrapbook really much like Scale documentation book Leading off Albatross design George Reich really turns Winter 80-In semi-cabin design competitive pylon ships Toms model first Dennymite engine now has ignition Super Cyclone piece wood carefully selected holes cut ribs forextra lightness plus lightweight silk covering clear dope finish keeps wing loading 8 oz per sq ft FF 10 RCI Has thick high-lift wing high thrust line shock gearprecisely like original old guy like Tom managed 465 project survivor Alamo Tom founder Detroit RC Club 29 years ago origi nators Toledo RC Exposition also versatile enough have won second Michigan State Meet Lacy 10 M Peanut During 1980s Torns oldies have taken 39 high places Toms documentation time-trip book Tie string around finger. have luck Irish seeing legendary fliers make great flights Lew Mahieu Dooling 29 tiny Zeek Joe Konefes 44-min Bombshell Chicago Roy Nelder launching Moffett winner Copland Jim Cahill Wakefield-winning Clodhopper Wris ton Dague Carl Goldberg diamond Zipper Interceptor Sailplane Valkyrie Cumulus Gordon Light Lanzos Bomber RCs big Puss Moth flew like Mulvihill Kovel KG Bassett talring Eastern States So-Long Elgin Playboy timed Kordas mighty Wakefield flight Aldrich Nobler Yates Madman Palmer often Saftig Zilch 445-pm shoot-outs Speed Walker Goods Kasmirski Orion Bon ner Smog Hog ff1 sat down sky fell Weird So watched among others George Reich Albatross left lifetime impression least 30 years no seemed notice Ive looked plans times published designed 1940 Air Trails Reich two-time Wakefield team mem ber once winning fabled cup Dick Kordas brother-in-law another Cleveland band immortals still builds flies oldies SAM stuff Albatross discovered bang Pylon Free Flight models ruled iron hand good 20 yearsthey alone could handle high power witness modern Satellite Yet like Konefes Reich went cabin design George secret side profile gave high wing like pylon high thrust line made fly like postwar 1950-1960 high-thrust pylons could climb safely dead ahead bored holes sky combi nation Albatross ideal now super-stable loafing around RC assist Old-Timer bag Oddly has lifting-type tail CG one-third wing chord supposes Astro cobalt geared 40 16 cells would get high enough 12 min Electric McCoys book full surprises sort modeling family bible Only notebook gee er featuring Alba tross Xerox some art directors work Id guess alone makes unique page encased protective plastic begins simply pageeverything throughout neatly typedcalled Old-Timer RC Mod el tabulated vital specs flip side against black background old magazine clipped photo guys room 1939 Nats Reich Elgin Korda McCoy others Another page describes original Alabatross along color photo Reich 1982 Lanzo Bomber Thats followed entire construction feature 1941 Air Trails two pages entitled Model Virtually page includes some old clipping involved old-timers relevant models page about engine quote tells work good read Super Cyclone 60 gift old friend Harvey Thomasian Worster MA Harvey old-time engine man particularly famous customtuned K&B engines during late 1 950s early 1 960s Harvey has large collec tion old ignition engines Cy clone certainly beautiful Although Left Toms model very popularTaibi Powerhouse placed second 1983 MIchigan State Old-TimerContest models shown have won other places Right First place Toledo 1982 went Toms rendition Maurice Schoenbruns Gladiator Like other Schoenbruns classics distinguished ample area deep belly high thrust line long tall moment Another cabin model Left Another Lanzo design Record Breaker isa functional parasol nice lines shot Danny Sheelds Americas unofficial Old-Timer goodwill ambassador British events Right Berkeleys Buccaneeretili built great numbers Heres Tom rendition 19308 classic Thanks early RC efforts Joe Raspante design also authentic RC Old-Timer Joeswasa monstrous size May1986 23 Stinson SR-S Megow followed about cowl bumps Winter says did bigger 1934-35 Flying Aces built sizes up 45-in span Bell relates bittrickyto adjust poor glide after power ran out glide improved after wear tear patches previously-siickwing Winter launching Rearwin Speedster indoor Scale meet Bill Bell says Speedster notes cheated Rubber first new models 1980 Once kitted Peerless 24-in-span design Scale designs generous tail area insomewhat beefed up still good flier indoors out Bell photos Tom Schmitt creases Made em fly much better says Left Pleet Trainer another Peerless two profile pilots impressive radial engine nose plug being readied winding stooge second Bell project required dihedral top wing good flight fuil-scale ship nonewhich would fine RC Right Caimly Bell gets off perfect two-hand launch dainty bipe Model has flying wires although cant seen plc its looks may fool new engine well broken-in pleasantly surprised find will turn 8500 rpm 14-4 Tis small world Harvey buddy Hal deBolts roughly 30 years ago published Live Wire-type plane Harvey trike gear Just lately during -scale Vagabond project supplied photos full-scale red-and-white Vag Just today same photos much other documentation sent HA Thomas similar project friend Hartsfield Little Rock Thomas McCoys book turns Propeller Tom says flatly present-day props unsuitable old ignition engines simi larly can tell traditional props best four-stroke engines no 3-in pitches FF useful prop case TF 11-4 has wrong blade shape lower ignition rpms Tom tells us may have heard low-wing Spartan did know also cabin version Bells third project once Comet kit Bill says its often mistaken fora Stinson Note ring cowl circa 1930 struts Neat two-hand launch Bill uses smooth fluid 24 Model Aviation Left Flying through skies Ninjing China Joe Tschirgis Short Stik tailless shortened Giant Stik currently powered 2500cc Supertigre Waibo pumpercarb No trick airfoil elevons widened Does nice wingovers buttall makes crosswind taxiing pain Text detalis Tachirgis expianation symmetrical wing standard zero-zero conventional piane may appearto fly level trim kind Refer diagram below follow discussion Right Can beileve Its Joe Tschirgl Stik its derived Bill Evans tailless technoiogy Older CL Combat fliers may remember Nobody design almost identical approach book has stuff reworking props Lost Ark data coming 1940 Air Age Annual Air Age corporate name MANs publisherbut doubt MAN annual 1940 whereas Air Trails did Thomas article certainly needs republishing Replete wonderful draw ings about methods obtaining truepitch prop includes blade top side profiles 14-8 probably would make Enya 60 four-stroke run like blue blazes Suffice say McCoy constantly pressured great props various hands have impres sive win record INVERTED TRIM PITCHING MOMENT ABLE REGION ANGLE OF ATrACK 4- FROM ZERO LIFT UPRIGHT TRIM POINT s new modeis foiiowed Taylor Cub Peerless Cessna C34 neither shown 24-in Taylor best lot though beefed up Beli states almost lost number times Above Aftera Fokker 0-Vil Scientific made tight turns fine glide good fiying indoors Bill built very beautifui Douglas Vi 0-43 Comet shown two views iost powerfui thermai 1984 now has repiacementversion forflying indoors Below Nicelydetailed resplendent Navy colors Beils F4B-4 American Modeicraft big use indoors waiting forgood outdoorweather Pianetakes six strands Ia-in rubber one-third Toms book states following section presen tation personal about mod els Thats beyond reporting talents Color pictures galore red blue yellow win ribbons Reports various major SAM meets can select some photos Toms models run descriptive captions ways fly alas horde newcomers may never discover before run course Bud Davisson gifted pilot word-maker does the Cockpit series MAN talked Command Air cover January 1986 MAN put extremely well urged Giant Scalers Continued page 26 May198625 Winning Ideas FOURMOST RETRACTABLE iTOWHOOKRELEASE Price 8690 V y4 F Simplest reliable device available After line released hook retracts body unit leaving SMOOTH surface bottom aircraft No special attachments required N eight Y2 oz OTHER FOURMOST PRODUCTS 0491051 AIRFLO ENGINE MOUNT 40 AIRFLO ENGINE MOUNT IDEAL FOR GUICKY 500 PRICE $630 REDUCES DRAG VIBRATION FREE PRICE $300 Fuel Fitting Sets Fuel Shut Off Fuel Manifold Gaplese Hinges Gapless Hinge Slotter Strut Fairings Codcpit Coaming nd SASE Complete Information 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 NEW GLASS FILLED MOTOR MOUNTS 0405 1011 1519 2025 3035 4045 40451 5050 5070 195 225 235 245 265 275 300 325 325 OEM BULK INQUIRES INVITED Featuring LONG GLASS FILLED NYLON FOR STRENGTH AND STABILITY Alignment Lines Mounting Interchangeable Kraft Flat bottom nose gear SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 AREA CODE 513 738-1576 put Technopower radial stand out bipe dont let see giving airplane Warp 9 performance said Let float along Let poke slowly can retrieve running under grabbing Let change pace Bud may have gotten bit carried away indelible experi ence nearly 50 years ago 30-in rubber-powered SE-S Joe Ott design Bud added Youll guy field can zig should have zagged push should have pulled will have airplane gives him plenty time correct mistakes Itll model because does 1/1 scale Two worlds Fly power Fly wing both prithee Bud could speaking old-timers things fly wing goes far beyond old-timers Years ago people tired the wall-to-wall Pattern-type thing escaped RC Sailplanes must have noticed years heavy advertising popularity Flying wing antique fetish What airplane during its aerobatic routine wonderfully fulfilling letting air plane itself almost sheer beauty flight equally fulfilling gotta have power Sailplane has except gravity Zero displacement maybe should keep scrapbooks rainy days doesnt rain gentleman Dihedral Ave address omen never saw Bill Bell come-backer So thousands born-again readers special case course chose specialized beautiful Tom McCoys brilliant pursuit Old-Timers ap preciate Rubber Scaleas us whether fly themBills efforts merit resounding well done As kid during Thirties Bill built Scale models 10- 25- 50-cent kits Megow Comet etc did vast multitude 1980 interest stick-and-tissue birds rekindled discovery Golden Age Reproductions new kit models put out Joe Fitz gibbons Tom Schmitt takes memo rable pictures wanders provides delightful prints make report possible Suppose group few Bill Bells Rubber Scale ships captions does other things too bumped him once flying dream Stearman biplane Flyline Models kit engine lo behold other models old designs case AMA Museum highlights some misdeeds written Bill finishing Albatros D-5 garish streamlined fighting machines WW D-5 some reason makes stupendous flier view pictures way Scale guys will dreaming manner RC things including Giant Continued page 28 26 Model Aviation FCYANOACRYLATE List Sale Savings 1 oz Fast Cure 3-5 Sec 495 $2 500/0 Off 2 oz Fast Cure 3-5 Sec895$396560/0 Off 1 oz Gap-Filling 5 Sec495 $2 50% Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave San Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 408 251-0789 Out StateINFO 408 251-0787 California Hours Mon-Wed Fri & Sat 930-530 Thur 930-900 1200-500 Pronto Retail $3995 Super Pronto Retail $4995 HIGH QUALITY 48 SPAN KIT FOR 09 TO 25 ENGINES FEATURES low wing design high wing stability excellent inverted performance Gentle novice Expert versatile performance 4-6 hour rapid-fire assembly beginner Precision machine-cut SIG balsa plywood spruce Rolled full size plans showing complete wing Step-by-step instructions easy assembly Formed main landing gear Exceptional small field performance May flown ito 3 channels Tested recommended approved b RIO Modeler Magazine Model aviation July 84 Virginia residents add 40/o sales tax Playmate ready now 5 15 pan 50 2 4 cycle TIDEWATER HOBBY ENTERPRISES Route 1 Box 2410 Lanexa Virginia 23089 Lftj9i Phone 804 966-5092 Scale course Rubber Scale guys will go ga-ga little traveling music please . Nanjing China Warning rock slides ahead Set stage cast characters bit background like strange airplanes anybodys impossible novel ties Since violate no aerodynamic law notions airplanes must fly has narrowly rigid Among us little knowledge can dangerous thing Maybe its good challenge traditions live Virginia Im Missouri am open-minded least dozen things including cockeyed dihedral explanations Im far out flexible Ive never seen genuine proof synimetrical-airfoiled wing zero-zero setup cant maintain level flight being trimmed ele vated up down does see strange things however elemental truth am necessarily stupid Okay engineers know some lift must developed situations agree shakily disagree Now time-out introduce Joe Tschir gi writes hotel room opposite side globe Joe respected old-timer fa mous strange airplanes ortho dox Scale models beautiful fliers apt strange Some may re member things like German WW Brandenberg biplane flying boats really strange Scale bird its prop located aft wings conventional fuselage Play mechanics once member own club NVRC prior coming Virginia years ago involved pro fessionally drones stuff knows subject description out-of-control RC model reed Rookie December issue caught eye Joe begins some years Ive trying finish series articles stability control mod els Its natural endeavor since before retiring 18 months ago fooled people believing knew something about sub ject 35 years Anyway question good Pattern models need little no down trim level inverted flight has always bothered Since wife decided masquerade English teachers Nanjing Ive time think about problem believe now have answer Authors Note excellent technical discussions received column one-on-one basis because references mysterious things ob served fun theme best served avoiding esoteric deep stuff example pile brilliant papers pro con relating air ocean debate fills series large manila envelopes Some letters exceed length column making exception Joe Tschirgi hoped reader will drop out Continued page 139 28 Model Aviation DAVE ROBELENS PRONTO AAJfl IIPPR PRAAITA per oreer FAST SERVICE COD ADD $190 Letters Editor Continued page 12 Thus weve filed criminal complaint charges against guy shooting down airplanes flying through sky Its lengthy battle prosecute sin come down home stretch hope will win Now before leave office have recommendation state Lets finish up court case forget about hate Weve lived through three years prob lems some us its rough Lets get sport model avi ation weve suffered long enough Mike Barklow Appleton WI accompanying letter Mike said foregoing poem written 1983 stepping down president Valley Aero Modelers clubs newsletter notpri nted due suit progress Despite best efforts club lost flying field doldrums briefperiod maintaining positive attitude group able establish new flying site rebuild itself now bigger better ever very gratying to organization Mike notes Safety/Preston Continued page 20 about accident members havent heard heres story heard few weeks ago member friend out flying weather fairly cold member standing wing tip friends plane friend attempting start using standard electric starter plastic engagement cone Somehow engine started friend surprised starter slipped off spinner hit ground trigger still depressed strn spin ning plastic cone exploded sending fragments directions friend got small piece through part ear sliver hit member corner eye caine out again doctor says 50% chance will lose eye may have have cornea transplant incident tragic enough itself stop think what could have happened occurred field person hurt innocent bystander kid Weve got keep spectators children out pit area Friends not. comment incident repeat something Ive said several times previously consider pair safety glass es starting model working shop Have safe month John Preston 12235 Tildenwood Dr Rockville MD 20852 Plane Talk/Winter Continued page 28 things become bit sticky Some will understand presentation its entirety am fortunates can interpret comments virtue simple diagram no math Will prescription fly Ponder photo giant tailless Ugly Stik involves no trick airfoils Follow Joe end youll find other comments play Let assume perfectly symmetric aircraft argument Tschirgi warms up has symmetric airfoils both wing tail thrust line wing tail CG centerline has zero-zero incidence setup also assume fore-and-aft CG position such model trim level flight Since model perfectly symmetric pitch plane its obvious model will also fly straight level verted assumptions solu tion clear leaves another problem can such model trim angle attack except zero tricky part model symmetric angle attack airflow over Behind wing generating lift have downwash evidence vorticity shed wing Its strength centerline strong function aspect ratio normal model configurations downwash small function angle attack concentrated directly down stream model changes angle attack tail sweeps through region Generally results pitching moment curves nonlinear have reduced static stability near zero lift sym metric model assumed stabil izer center downwash field However CG far enough aft static stability can zero unstable region exhibiting positive static margins outside unstable point maximum downwash effect model will have two trim points symmetric model postulated would equal opposite sign lift coefficients best visualized referring illustration fact dynamic pressure re duced wings wake Joe goes also contributes non-linearity course reversal cannot exist unless static stability quite small tail out wakeie CG well aft brings up another interesting point models easy fly some cases easiest have little static Continued page 142 May1986 139 n ou sy SEE- HFE THE BOTTLE OF ZRPJET LEPKED FiND sNIcKE YOU TRIED TO SCRPTCH YOUR GIGGLEEP / 0 ZIin ZSOL 92 span 19-21 lbs $20995 Piper PA-17 Vagabond 84 span 10 lbs $15995 Super P11 92 span 19-21 lbs $18995 Chipahip 90 80 span 1/5 scale $12995 TalIwbeel Assemblies 3-8 lbs$1095 4-9 lbs$1295 10-l8lbs$1495 lOibsaup$1595 Manufacturers Softglass Fast Tape Fast Threads 1/4 Scale Pilots Plans construction models three large sheets eli parts shown full scale Weighs down construction bales plywood Models available F 84-F Thunderetreak Sabre F 100 Super Saber Fighting Falcon Eagle Mirage 2000 21 Fishbed i Blackbird F 104 Scarf ighter Fit types ducted fan units wheel 5 dia 40 80 engines Available also motor ducted fan unit sod canopy Price plan 5000 US dollars includes shipment air mail rolled tube Write free literature InformatIon G Bertella Via Matteotti 248 Gardone VT 25063 Brescia Italy 1981 World Soaring Champ DWIGHT HOLLEY FEATURES Sailplanes lous Electric Planes AS1IOFLIOHT e UNGE e 11113 MOICIS IN STOCK SANYO SANYO SANYOBattery Special NSOOAR Weigh 36 Grams Cut Oficells NEW Lower Price Red Jacket Cut Off cells N1200SCR Weigh 52 Grams $340 1200MAH Now 2 New Super Cells Sanyo N-900SC SCR Cut Off cells $375 Both weigh 39 Grams 3/4 length 1200s same dia N900SC will deliver least 950 MAH N900 SCR will deliver great amperage quickly oELECTRIC MODEL SAILPLANE SPECIALISTSHOLLEYS SILENT FLIGHT FEATURING ONLY STATE OF THE ART ITEMS 03 748-0083 LUCALL OR WRITE FOR FREE DESCRIPTIVE FLYER 151 CHESTNUT RIDGE RD BETHEL CT 06501 U MS SPEED CONTROLLERS e GRAUPNERe ASTROFLIGHT KELLER UNGER Plane Talk/Winter Continued page 139 stabilityat Static margins percent chord would dangerous full-scale aircraft Conventional models have dynam ic stability far excess full-scale aircraft because very low density fact believe modelsparticularly Pat tern RC duration power modelsare dead-beat fundamental pitch modes allows marginally-stable stat ically RC model easily flown Fur ther low static stability high dynamic stability required model going groove same qualities needed Free Flight models handle high powerbut another long story As might have gathered Im con vinced dynamic stability damping important primary factor suc cessful model design primary factor both pitch stability control both RC FF Power also major requirement spiral stability Free Flight models discussion has simplified assuming symmetric model same two-trim-point pitching moment curve possible asym metric model including cambered wing fact inclusion cambered wing may make easier achieve However explanation much involved since cambered airfoils pitching moment necessary ingredient two-static-trim-point mo ment curve certainly flyableI believe have done itI doubt total cause unusual incident Tschirgi continues believe Janomo lie would noticed corrected example bit down elevation fed level flight model would shift negative trim point stay trimmed elevator neu tralized CG assumed moment curve shifted bit forward un stable region would become flat very slightly stable double trim point would vanish very slight amount down elevator trim would make second trim point reappear believe typical condition RC model 0 0 0 0 Ce 0 2 0 Ce Ce m -l 0 2 Cit C F F grooves well remember reed servos fairly wide deadband neutral because use slide switch contacts Hence think model grooved well servo stopped downside deadband Au Eureka finally know Only once before has anyone offered respectful comment observation zero-zero symmetrical wing sometimes gives impression model can remain straight level control input observation flies face truth wing must generate lift hold such attitude Years ago asked Joe Wagner thought such setup could maintain straight level possible Joe replied sym metrical wing changing its angie attack between positive negative over small range trim its doing visible eye wonder now about Wagners ooncept invisible chang ing trim exists necessarily has two limitspositive negative note Tschirgis diagram need understand two trim points calls out shown intersections line labeled Angle Attack Zero Lift say wonder strange out-of-control flight Rookie occurred 1962 Control lost plane inverted overhead low altitude up-trim rolled inverted obviously no downtrim oould inputted inverted since control gone plane circled entire area maintaining constant altitude eventually arriving low overhead original headingat point control regained quick landing plane symmetrical Yo-/3 semi-symmetrical airfoil some angu lar difference some dihedral high thrust line design factors oom bined especially high thrust line low thrust line inverted help maintain impossible level flight probably could servo stopped side neutral Tschirgi said would impart unknowing slight down elevator trim dont forget Tschirgis analysis shows truly142 Model Aviation Ohio 11376 Ridgeway Rd Kensington OH 44427 216223-1950 1 Full Size Plans Ducied Fans 1 J C Trainers_ Wing 60 Size40 SemhSyme Size20 Size See local dealer call us location dealer nearest symmetrical model also could maintain straight level flight under same conditions eye old Rookie generating liftwhen fact lift present law states due strange confluence conditions aerodynamics beyond ken modelers Highly interesting fact modffied Rookie comes close will duplicate inverted phenomenon much heavier balanced one-third chord whereas original lighter CG 40% chord will have noted Joe Tschirgis references balance points balance 40% what new Rcokie surprises people fly its ability go inverted slightest urging remain inverted ease long periods steering such inverted Figure 8s additionally implies non-symmetrical craft kind disposition surfaces thrust line etc could fine-tuned maximize desired end product series de velopment Bats belfry know whats So whats Purple Plan mail brings mention some guys Purple Plan repairs finishing dusty frameworks hanging think AMA should have Purple Plan badge could wear proudlyor pin rear buddy cant get acttogether now alas probably 50% remember did see column year ago Purple Plan important tote keeps up well have rerun item Ive now applied flying keep saying Wait till next year next year field muddy early spring winds blow gets tco hot gets windy again too cold Once snow sleet fog no excuses October sometimes late September November later golden days Like Ba hamas wind III can get two perfect October days makes up year worthwhile make another plane two over months via Purple Plan flying career goes FLYS GREAT IDEAL BEGINNERS AIRPLANE THAT BUILDS IN HALF THE TIME Jig built balsa fuselage 90% Built wing Excellent instructions first time builder Full size plans Decal forms windshield JOHNNIE CASBURN MANUFACTURING CO 5115-SE E Rosedale Fort Worth TX 76112 Day 817/451-7537 t 817/572-1452 always another golden October modified Rookie Enya fourstroke 60 sat unpainted nearly year flies beautifully thrust torque its 14-6 8300-8500 awesome especi ally pulling through tight slowed up close-in aerobatics wont fly helper reminds crewing Giant Scale Aristocrat 18-6 prop 7000 rpm need two-hand hold remote glow plug battery connection must things would simpler years Ive requests plans Rosenstock see ads has plans early-1960s version youll able get plans new Model Builder before too long bought first kit cant believe Midways Dennyplane want build think aluminum-cowled round OldTimer has dream too years wood cutting first rate plans something else old-timer old-fashioned plan always some mistake few details doesnt matter since need lines pin down spars longerons etc plan certainly authentic mid-30s box has original Dennyplane labels picture Denny himselfwith goggles Typical day theres block listing guys drew traced whatever signed off including ol Reggie himself some other modem names No cross sections no rib patterns outline side view. s way Im delighted know fineflying ancient model actually looks like airplane took plunge because showed pictures Dennyplanes got me. may go first Sigs new Kaydet Senior big bird trainer bigger Eagle three channels lots openframe stuff fuselage once flew planes like 19s rudder-only control almost no elevatorsnot throttle have aileron jobs already know can enjoy floating around like bird soaring heavens isnt very windy Designer Claude McCullough has going back silk dope can Continued page 147 May1986143 CD CD 0 z 0 z 0 C/ 0 -u 0 -u m m 0 Q H CD n 0 0 C/ 0 C, 0 0 31 0 ThJ Lr N CD C, N x x x x x 01 x x x U Available NowThe New Breed Sachs/DolmarLightst weight hand start ready-to-mount engines market 31 $27500 34- $34500 37 $35500 42- $37500 Engines Complete Nothing Extra Buy Choice points 1SIba2z-SYaHP34-5Ibsftoz-65P37-SIhs4oz-CtaHP42-5Vjs3oi-7MP CDI IgnitionOption engines Throttle-coupled spark advance Features CustomIz newest German engines parts ler t ting Bolts sure Tap smoke Carburetor Linkage Ignition ICH Eiectronicsl Ignition Peck ty Switch lt Hub stor Spk Pigs Warranty Fauity Parts Workmanship T G Mfg 857 High Mountain Rd North Haiedon NJ 07508 e 201 427-3845 Plane Talk/Winter Continued page 143 enjoy does will use spoilers see article February issue plan new wrinkle hate install ailerons tape Bill Evans now AMA Museumcompany demo Slow Motion Electric Astro 25 14 cells 12 Ah capacity conned Bill roaring success direct driveaerobatics plus soaring over hour high-speed inverted flybys got five-year-old kid fly attention wanderedyou could see him watching other airplanes Yet Slow Motion sailing wide circles wide open piped 60 Desperado Evans hates stabilizers Des perado published April 1984 issue magazine has cathedral huge towering tail Stable rock course does what consider fearful high-speed aerobatics film paused ask wanted 60-powered Desperado subscribe old-fashioned explanation dihedral works plane could fly would nearly unflyable tractable Slow Motion published MA Ive told Bill could spec version match SloMo fine now has picture Dasher 60and like am willing tackle 60 Dasher max 40 power What am saying Actually Id feel good hot 25but am double-dared 74 tape showed Giant Scale CAPso pretty Look close gosh no stabilizer flights tape better what can stab Its called T-CAP slowed-up tendencies CAP stall vanished stab Slow slow fly bys tips quivering Yes hot Tschirgis crazy giant tailless Stik wonders bother making boring tail surfaces Airfoils CG locations make possible things see Thank Lord Purple Plan golden Octobers Bill Winter 4432 Altura Ct Fairfax VA 22030 Can talk ask pictures returned accompanying envelope obviously cannot use wonderful things Dont have negatives making prints ones send wont priceless Others would like see please include stamped pre-addressed envelopes least stamp Try use influence postman wont ask excess postage responding advertIsers mentIon read aboutthem ModelAviation Radio Technique/Myers Continued page 43 utor Salt Lake City area fourchannel two-stick 75 MHz radios stock time said Go ahead wont make difference also talked established hobby shop owner nearby village told RC airplanes dont sell around cant keep enough off-road RC cars stock first radio went back distributor its easy see retailers arent bad guys situation hope see suggested Bob Aberle back 1982 fre quencies divided mentioned again column June 85 discussed AMA Frequency Committee meeting November 85 reiterated John Prestons column April 86 issue wit Weve got get manufac turers permanently mark 75MHz radios use aircraft 72 MHz radios Aircraft Only right factory markings arent permanent arent put factory wont have effect probably wont happen until 1988 shared channels go away think ought put some effort making happen Ive really buried letters Please Introducing. irekIIn RIC Idle-Bar Glow Plugs Long Short Also.Only $169 Traditional line non-idle bar Glow Plugs a Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $129 Swanson Associates PO Box 151 Wayne NJS948 07470 m Custom Built Models 2036 N Thorn Ave Fresco CA 93704 em 6 pmOrder Phone 209 233-1050ask Bill If you LOVE fly HATE build Contact e solution probleml Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc - IF1yWhatIBuu1d May1986 147 lie Koush Laser Kit TG Reg $24995 hardware -$27995 SYNTHETIC LUBRICANTS CASTOR LUBRICANTS POWER ADDITIVES FREE CATALOG INcODUCT INFOTIPS UDES~ 800-242-0489 777 j3#7 Pt Box 11343 154tt57 219-749-1489
Edition: Model Aviation - 1986/05
Page Numbers: 22, 23, 24, 25, 26, 28, 139, 142, 143, 147
Bill Winter 0 Plane Talk THEY SAY can tell man books tell fellows largely kinds models build fly Before column sets sail three-yearjourney search Great White Whale owe landmark Resisting impulse explore Mice-in-Wonderland science preparing competition Scale documentation cal culated science thought-controlling judges show em everything show em nuttin known documentation done its own sake can become book book about Albatrossthe double S tells about Scale Albatros 5 WW German fighter Things such grow like ivy Lets begin Tom McCoy picture Lanzos RC-l radio job 1934 appeared column three months ago Aware McCoy old buddy Chet Lanzo asked both photos background resulted threeview Chets exciting photos presented two months back During 1980 bull session Chet men tioned drawing plans forgotten wun derkind remark went over Toms head until saw Chet fly pretty bird SAM Champs Westover AFB 1982 supposes knew what looking subsequent meet Cleveland Tom realized earliest-ever RC jobs Chet gave him plans romance RC-l began happened Toms photos RC-l arrived docu mentation book Albatross did color shots stable superbly-built OldTimers Antiques exquisite Tom demon competitior well 1984 alone compressed-air King Burd took first SAM Champs RC-1 won another Michigan State Champs DRCC OldTimer still another RC Old-Timer Detroit Expo second OldTimer Toledo Lanzo Bomber OldTimer won first MRCA Show second Detroit RC contest third New York State Championships Building 38 years Tom joined AMA Detroit Balsa Bugs 12 1952 Junior AMA Champion winning Cooper Brothers Trophy Indoor Rubber 19 flew first RC Berkeley Cavalier Citizen ship 465 equipment Having published first license free RC plans ever MAN 40s using pre-production sample radio can attest 19-yearLeft Tom McCoy Lanzo Bomber RC first 1983 Toledo Show Tom favors natural yellow silk variations trademark color schemes consisting blue black trim often white striping set things off Above Compressed air King Burd atthe 1982 MichIgan State Meet boxy Robin-like modeiwon boththeSAM Champsand MiniChamps Ribs narrowtips wing tail holed forlightness Winterwonders abouta 1 0-1 5 gasfor oran electric motorforhigh-time duration over 40 wins golden oldies mostly firsts seconds Tom McCoys virtual museum pieces show little no sign strenuous competitions show seven examples selected Toms scrapbook really much like Scale documentation book Leading off Albatross design George Reich really turns Winter 80-In semi-cabin design competitive pylon ships Toms model first Dennymite engine now has ignition Super Cyclone piece wood carefully selected holes cut ribs forextra lightness plus lightweight silk covering clear dope finish keeps wing loading 8 oz per sq ft FF 10 RCI Has thick high-lift wing high thrust line shock gearprecisely like original old guy like Tom managed 465 project survivor Alamo Tom founder Detroit RC Club 29 years ago origi nators Toledo RC Exposition also versatile enough have won second Michigan State Meet Lacy 10 M Peanut During 1980s Torns oldies have taken 39 high places Toms documentation time-trip book Tie string around finger. have luck Irish seeing legendary fliers make great flights Lew Mahieu Dooling 29 tiny Zeek Joe Konefes 44-min Bombshell Chicago Roy Nelder launching Moffett winner Copland Jim Cahill Wakefield-winning Clodhopper Wris ton Dague Carl Goldberg diamond Zipper Interceptor Sailplane Valkyrie Cumulus Gordon Light Lanzos Bomber RCs big Puss Moth flew like Mulvihill Kovel KG Bassett talring Eastern States So-Long Elgin Playboy timed Kordas mighty Wakefield flight Aldrich Nobler Yates Madman Palmer often Saftig Zilch 445-pm shoot-outs Speed Walker Goods Kasmirski Orion Bon ner Smog Hog ff1 sat down sky fell Weird So watched among others George Reich Albatross left lifetime impression least 30 years no seemed notice Ive looked plans times published designed 1940 Air Trails Reich two-time Wakefield team mem ber once winning fabled cup Dick Kordas brother-in-law another Cleveland band immortals still builds flies oldies SAM stuff Albatross discovered bang Pylon Free Flight models ruled iron hand good 20 yearsthey alone could handle high power witness modern Satellite Yet like Konefes Reich went cabin design George secret side profile gave high wing like pylon high thrust line made fly like postwar 1950-1960 high-thrust pylons could climb safely dead ahead bored holes sky combi nation Albatross ideal now super-stable loafing around RC assist Old-Timer bag Oddly has lifting-type tail CG one-third wing chord supposes Astro cobalt geared 40 16 cells would get high enough 12 min Electric McCoys book full surprises sort modeling family bible Only notebook gee er featuring Alba tross Xerox some art directors work Id guess alone makes unique page encased protective plastic begins simply pageeverything throughout neatly typedcalled Old-Timer RC Mod el tabulated vital specs flip side against black background old magazine clipped photo guys room 1939 Nats Reich Elgin Korda McCoy others Another page describes original Alabatross along color photo Reich 1982 Lanzo Bomber Thats followed entire construction feature 1941 Air Trails two pages entitled Model Virtually page includes some old clipping involved old-timers relevant models page about engine quote tells work good read Super Cyclone 60 gift old friend Harvey Thomasian Worster MA Harvey old-time engine man particularly famous customtuned K&B engines during late 1 950s early 1 960s Harvey has large collec tion old ignition engines Cy clone certainly beautiful Although Left Toms model very popularTaibi Powerhouse placed second 1983 MIchigan State Old-TimerContest models shown have won other places Right First place Toledo 1982 went Toms rendition Maurice Schoenbruns Gladiator Like other Schoenbruns classics distinguished ample area deep belly high thrust line long tall moment Another cabin model Left Another Lanzo design Record Breaker isa functional parasol nice lines shot Danny Sheelds Americas unofficial Old-Timer goodwill ambassador British events Right Berkeleys Buccaneeretili built great numbers Heres Tom rendition 19308 classic Thanks early RC efforts Joe Raspante design also authentic RC Old-Timer Joeswasa monstrous size May1986 23 Stinson SR-S Megow followed about cowl bumps Winter says did bigger 1934-35 Flying Aces built sizes up 45-in span Bell relates bittrickyto adjust poor glide after power ran out glide improved after wear tear patches previously-siickwing Winter launching Rearwin Speedster indoor Scale meet Bill Bell says Speedster notes cheated Rubber first new models 1980 Once kitted Peerless 24-in-span design Scale designs generous tail area insomewhat beefed up still good flier indoors out Bell photos Tom Schmitt creases Made em fly much better says Left Pleet Trainer another Peerless two profile pilots impressive radial engine nose plug being readied winding stooge second Bell project required dihedral top wing good flight fuil-scale ship nonewhich would fine RC Right Caimly Bell gets off perfect two-hand launch dainty bipe Model has flying wires although cant seen plc its looks may fool new engine well broken-in pleasantly surprised find will turn 8500 rpm 14-4 Tis small world Harvey buddy Hal deBolts roughly 30 years ago published Live Wire-type plane Harvey trike gear Just lately during -scale Vagabond project supplied photos full-scale red-and-white Vag Just today same photos much other documentation sent HA Thomas similar project friend Hartsfield Little Rock Thomas McCoys book turns Propeller Tom says flatly present-day props unsuitable old ignition engines simi larly can tell traditional props best four-stroke engines no 3-in pitches FF useful prop case TF 11-4 has wrong blade shape lower ignition rpms Tom tells us may have heard low-wing Spartan did know also cabin version Bells third project once Comet kit Bill says its often mistaken fora Stinson Note ring cowl circa 1930 struts Neat two-hand launch Bill uses smooth fluid 24 Model Aviation Left Flying through skies Ninjing China Joe Tschirgis Short Stik tailless shortened Giant Stik currently powered 2500cc Supertigre Waibo pumpercarb No trick airfoil elevons widened Does nice wingovers buttall makes crosswind taxiing pain Text detalis Tachirgis expianation symmetrical wing standard zero-zero conventional piane may appearto fly level trim kind Refer diagram below follow discussion Right Can beileve Its Joe Tschirgl Stik its derived Bill Evans tailless technoiogy Older CL Combat fliers may remember Nobody design almost identical approach book has stuff reworking props Lost Ark data coming 1940 Air Age Annual Air Age corporate name MANs publisherbut doubt MAN annual 1940 whereas Air Trails did Thomas article certainly needs republishing Replete wonderful draw ings about methods obtaining truepitch prop includes blade top side profiles 14-8 probably would make Enya 60 four-stroke run like blue blazes Suffice say McCoy constantly pressured great props various hands have impres sive win record INVERTED TRIM PITCHING MOMENT ABLE REGION ANGLE OF ATrACK 4- FROM ZERO LIFT UPRIGHT TRIM POINT s new modeis foiiowed Taylor Cub Peerless Cessna C34 neither shown 24-in Taylor best lot though beefed up Beli states almost lost number times Above Aftera Fokker 0-Vil Scientific made tight turns fine glide good fiying indoors Bill built very beautifui Douglas Vi 0-43 Comet shown two views iost powerfui thermai 1984 now has repiacementversion forflying indoors Below Nicelydetailed resplendent Navy colors Beils F4B-4 American Modeicraft big use indoors waiting forgood outdoorweather Pianetakes six strands Ia-in rubber one-third Toms book states following section presen tation personal about mod els Thats beyond reporting talents Color pictures galore red blue yellow win ribbons Reports various major SAM meets can select some photos Toms models run descriptive captions ways fly alas horde newcomers may never discover before run course Bud Davisson gifted pilot word-maker does the Cockpit series MAN talked Command Air cover January 1986 MAN put extremely well urged Giant Scalers Continued page 26 May198625 Winning Ideas FOURMOST RETRACTABLE iTOWHOOKRELEASE Price 8690 V y4 F Simplest reliable device available After line released hook retracts body unit leaving SMOOTH surface bottom aircraft No special attachments required N eight Y2 oz OTHER FOURMOST PRODUCTS 0491051 AIRFLO ENGINE MOUNT 40 AIRFLO ENGINE MOUNT IDEAL FOR GUICKY 500 PRICE $630 REDUCES DRAG VIBRATION FREE PRICE $300 Fuel Fitting Sets Fuel Shut Off Fuel Manifold Gaplese Hinges Gapless Hinge Slotter Strut Fairings Codcpit Coaming nd SASE Complete Information 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 NEW GLASS FILLED MOTOR MOUNTS 0405 1011 1519 2025 3035 4045 40451 5050 5070 195 225 235 245 265 275 300 325 325 OEM BULK INQUIRES INVITED Featuring LONG GLASS FILLED NYLON FOR STRENGTH AND STABILITY Alignment Lines Mounting Interchangeable Kraft Flat bottom nose gear SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 AREA CODE 513 738-1576 put Technopower radial stand out bipe dont let see giving airplane Warp 9 performance said Let float along Let poke slowly can retrieve running under grabbing Let change pace Bud may have gotten bit carried away indelible experi ence nearly 50 years ago 30-in rubber-powered SE-S Joe Ott design Bud added Youll guy field can zig should have zagged push should have pulled will have airplane gives him plenty time correct mistakes Itll model because does 1/1 scale Two worlds Fly power Fly wing both prithee Bud could speaking old-timers things fly wing goes far beyond old-timers Years ago people tired the wall-to-wall Pattern-type thing escaped RC Sailplanes must have noticed years heavy advertising popularity Flying wing antique fetish What airplane during its aerobatic routine wonderfully fulfilling letting air plane itself almost sheer beauty flight equally fulfilling gotta have power Sailplane has except gravity Zero displacement maybe should keep scrapbooks rainy days doesnt rain gentleman Dihedral Ave address omen never saw Bill Bell come-backer So thousands born-again readers special case course chose specialized beautiful Tom McCoys brilliant pursuit Old-Timers ap preciate Rubber Scaleas us whether fly themBills efforts merit resounding well done As kid during Thirties Bill built Scale models 10- 25- 50-cent kits Megow Comet etc did vast multitude 1980 interest stick-and-tissue birds rekindled discovery Golden Age Reproductions new kit models put out Joe Fitz gibbons Tom Schmitt takes memo rable pictures wanders provides delightful prints make report possible Suppose group few Bill Bells Rubber Scale ships captions does other things too bumped him once flying dream Stearman biplane Flyline Models kit engine lo behold other models old designs case AMA Museum highlights some misdeeds written Bill finishing Albatros D-5 garish streamlined fighting machines WW D-5 some reason makes stupendous flier view pictures way Scale guys will dreaming manner RC things including Giant Continued page 28 26 Model Aviation FCYANOACRYLATE List Sale Savings 1 oz Fast Cure 3-5 Sec 495 $2 500/0 Off 2 oz Fast Cure 3-5 Sec895$396560/0 Off 1 oz Gap-Filling 5 Sec495 $2 50% Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave San Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 408 251-0789 Out StateINFO 408 251-0787 California Hours Mon-Wed Fri & Sat 930-530 Thur 930-900 1200-500 Pronto Retail $3995 Super Pronto Retail $4995 HIGH QUALITY 48 SPAN KIT FOR 09 TO 25 ENGINES FEATURES low wing design high wing stability excellent inverted performance Gentle novice Expert versatile performance 4-6 hour rapid-fire assembly beginner Precision machine-cut SIG balsa plywood spruce Rolled full size plans showing complete wing Step-by-step instructions easy assembly Formed main landing gear Exceptional small field performance May flown ito 3 channels Tested recommended approved b RIO Modeler Magazine Model aviation July 84 Virginia residents add 40/o sales tax Playmate ready now 5 15 pan 50 2 4 cycle TIDEWATER HOBBY ENTERPRISES Route 1 Box 2410 Lanexa Virginia 23089 Lftj9i Phone 804 966-5092 Scale course Rubber Scale guys will go ga-ga little traveling music please . Nanjing China Warning rock slides ahead Set stage cast characters bit background like strange airplanes anybodys impossible novel ties Since violate no aerodynamic law notions airplanes must fly has narrowly rigid Among us little knowledge can dangerous thing Maybe its good challenge traditions live Virginia Im Missouri am open-minded least dozen things including cockeyed dihedral explanations Im far out flexible Ive never seen genuine proof synimetrical-airfoiled wing zero-zero setup cant maintain level flight being trimmed ele vated up down does see strange things however elemental truth am necessarily stupid Okay engineers know some lift must developed situations agree shakily disagree Now time-out introduce Joe Tschir gi writes hotel room opposite side globe Joe respected old-timer fa mous strange airplanes ortho dox Scale models beautiful fliers apt strange Some may re member things like German WW Brandenberg biplane flying boats really strange Scale bird its prop located aft wings conventional fuselage Play mechanics once member own club NVRC prior coming Virginia years ago involved pro fessionally drones stuff knows subject description out-of-control RC model reed Rookie December issue caught eye Joe begins some years Ive trying finish series articles stability control mod els Its natural endeavor since before retiring 18 months ago fooled people believing knew something about sub ject 35 years Anyway question good Pattern models need little no down trim level inverted flight has always bothered Since wife decided masquerade English teachers Nanjing Ive time think about problem believe now have answer Authors Note excellent technical discussions received column one-on-one basis because references mysterious things ob served fun theme best served avoiding esoteric deep stuff example pile brilliant papers pro con relating air ocean debate fills series large manila envelopes Some letters exceed length column making exception Joe Tschirgi hoped reader will drop out Continued page 139 28 Model Aviation DAVE ROBELENS PRONTO AAJfl IIPPR PRAAITA per oreer FAST SERVICE COD ADD $190 Letters Editor Continued page 12 Thus weve filed criminal complaint charges against guy shooting down airplanes flying through sky Its lengthy battle prosecute sin come down home stretch hope will win Now before leave office have recommendation state Lets finish up court case forget about hate Weve lived through three years prob lems some us its rough Lets get sport model avi ation weve suffered long enough Mike Barklow Appleton WI accompanying letter Mike said foregoing poem written 1983 stepping down president Valley Aero Modelers clubs newsletter notpri nted due suit progress Despite best efforts club lost flying field doldrums briefperiod maintaining positive attitude group able establish new flying site rebuild itself now bigger better ever very gratying to organization Mike notes Safety/Preston Continued page 20 about accident members havent heard heres story heard few weeks ago member friend out flying weather fairly cold member standing wing tip friends plane friend attempting start using standard electric starter plastic engagement cone Somehow engine started friend surprised starter slipped off spinner hit ground trigger still depressed strn spin ning plastic cone exploded sending fragments directions friend got small piece through part ear sliver hit member corner eye caine out again doctor says 50% chance will lose eye may have have cornea transplant incident tragic enough itself stop think what could have happened occurred field person hurt innocent bystander kid Weve got keep spectators children out pit area Friends not. comment incident repeat something Ive said several times previously consider pair safety glass es starting model working shop Have safe month John Preston 12235 Tildenwood Dr Rockville MD 20852 Plane Talk/Winter Continued page 28 things become bit sticky Some will understand presentation its entirety am fortunates can interpret comments virtue simple diagram no math Will prescription fly Ponder photo giant tailless Ugly Stik involves no trick airfoils Follow Joe end youll find other comments play Let assume perfectly symmetric aircraft argument Tschirgi warms up has symmetric airfoils both wing tail thrust line wing tail CG centerline has zero-zero incidence setup also assume fore-and-aft CG position such model trim level flight Since model perfectly symmetric pitch plane its obvious model will also fly straight level verted assumptions solu tion clear leaves another problem can such model trim angle attack except zero tricky part model symmetric angle attack airflow over Behind wing generating lift have downwash evidence vorticity shed wing Its strength centerline strong function aspect ratio normal model configurations downwash small function angle attack concentrated directly down stream model changes angle attack tail sweeps through region Generally results pitching moment curves nonlinear have reduced static stability near zero lift sym metric model assumed stabil izer center downwash field However CG far enough aft static stability can zero unstable region exhibiting positive static margins outside unstable point maximum downwash effect model will have two trim points symmetric model postulated would equal opposite sign lift coefficients best visualized referring illustration fact dynamic pressure re duced wings wake Joe goes also contributes non-linearity course reversal cannot exist unless static stability quite small tail out wakeie CG well aft brings up another interesting point models easy fly some cases easiest have little static Continued page 142 May1986 139 n ou sy SEE- HFE THE BOTTLE OF ZRPJET LEPKED FiND sNIcKE YOU TRIED TO SCRPTCH YOUR GIGGLEEP / 0 ZIin ZSOL 92 span 19-21 lbs $20995 Piper PA-17 Vagabond 84 span 10 lbs $15995 Super P11 92 span 19-21 lbs $18995 Chipahip 90 80 span 1/5 scale $12995 TalIwbeel Assemblies 3-8 lbs$1095 4-9 lbs$1295 10-l8lbs$1495 lOibsaup$1595 Manufacturers Softglass Fast Tape Fast Threads 1/4 Scale Pilots Plans construction models three large sheets eli parts shown full scale Weighs down construction bales plywood Models available F 84-F Thunderetreak Sabre F 100 Super Saber Fighting Falcon Eagle Mirage 2000 21 Fishbed i Blackbird F 104 Scarf ighter Fit types ducted fan units wheel 5 dia 40 80 engines Available also motor ducted fan unit sod canopy Price plan 5000 US dollars includes shipment air mail rolled tube Write free literature InformatIon G Bertella Via Matteotti 248 Gardone VT 25063 Brescia Italy 1981 World Soaring Champ DWIGHT HOLLEY FEATURES Sailplanes lous Electric Planes AS1IOFLIOHT e UNGE e 11113 MOICIS IN STOCK SANYO SANYO SANYOBattery Special NSOOAR Weigh 36 Grams Cut Oficells NEW Lower Price Red Jacket Cut Off cells N1200SCR Weigh 52 Grams $340 1200MAH Now 2 New Super Cells Sanyo N-900SC SCR Cut Off cells $375 Both weigh 39 Grams 3/4 length 1200s same dia N900SC will deliver least 950 MAH N900 SCR will deliver great amperage quickly oELECTRIC MODEL SAILPLANE SPECIALISTSHOLLEYS SILENT FLIGHT FEATURING ONLY STATE OF THE ART ITEMS 03 748-0083 LUCALL OR WRITE FOR FREE DESCRIPTIVE FLYER 151 CHESTNUT RIDGE RD BETHEL CT 06501 U MS SPEED CONTROLLERS e GRAUPNERe ASTROFLIGHT KELLER UNGER Plane Talk/Winter Continued page 139 stabilityat Static margins percent chord would dangerous full-scale aircraft Conventional models have dynam ic stability far excess full-scale aircraft because very low density fact believe modelsparticularly Pat tern RC duration power modelsare dead-beat fundamental pitch modes allows marginally-stable stat ically RC model easily flown Fur ther low static stability high dynamic stability required model going groove same qualities needed Free Flight models handle high powerbut another long story As might have gathered Im con vinced dynamic stability damping important primary factor suc cessful model design primary factor both pitch stability control both RC FF Power also major requirement spiral stability Free Flight models discussion has simplified assuming symmetric model same two-trim-point pitching moment curve possible asym metric model including cambered wing fact inclusion cambered wing may make easier achieve However explanation much involved since cambered airfoils pitching moment necessary ingredient two-static-trim-point mo ment curve certainly flyableI believe have done itI doubt total cause unusual incident Tschirgi continues believe Janomo lie would noticed corrected example bit down elevation fed level flight model would shift negative trim point stay trimmed elevator neu tralized CG assumed moment curve shifted bit forward un stable region would become flat very slightly stable double trim point would vanish very slight amount down elevator trim would make second trim point reappear believe typical condition RC model 0 0 0 0 Ce 0 2 0 Ce Ce m -l 0 2 Cit C F F grooves well remember reed servos fairly wide deadband neutral because use slide switch contacts Hence think model grooved well servo stopped downside deadband Au Eureka finally know Only once before has anyone offered respectful comment observation zero-zero symmetrical wing sometimes gives impression model can remain straight level control input observation flies face truth wing must generate lift hold such attitude Years ago asked Joe Wagner thought such setup could maintain straight level possible Joe replied sym metrical wing changing its angie attack between positive negative over small range trim its doing visible eye wonder now about Wagners ooncept invisible chang ing trim exists necessarily has two limitspositive negative note Tschirgis diagram need understand two trim points calls out shown intersections line labeled Angle Attack Zero Lift say wonder strange out-of-control flight Rookie occurred 1962 Control lost plane inverted overhead low altitude up-trim rolled inverted obviously no downtrim oould inputted inverted since control gone plane circled entire area maintaining constant altitude eventually arriving low overhead original headingat point control regained quick landing plane symmetrical Yo-/3 semi-symmetrical airfoil some angu lar difference some dihedral high thrust line design factors oom bined especially high thrust line low thrust line inverted help maintain impossible level flight probably could servo stopped side neutral Tschirgi said would impart unknowing slight down elevator trim dont forget Tschirgis analysis shows truly142 Model Aviation Ohio 11376 Ridgeway Rd Kensington OH 44427 216223-1950 1 Full Size Plans Ducied Fans 1 J C Trainers_ Wing 60 Size40 SemhSyme Size20 Size See local dealer call us location dealer nearest symmetrical model also could maintain straight level flight under same conditions eye old Rookie generating liftwhen fact lift present law states due strange confluence conditions aerodynamics beyond ken modelers Highly interesting fact modffied Rookie comes close will duplicate inverted phenomenon much heavier balanced one-third chord whereas original lighter CG 40% chord will have noted Joe Tschirgis references balance points balance 40% what new Rcokie surprises people fly its ability go inverted slightest urging remain inverted ease long periods steering such inverted Figure 8s additionally implies non-symmetrical craft kind disposition surfaces thrust line etc could fine-tuned maximize desired end product series de velopment Bats belfry know whats So whats Purple Plan mail brings mention some guys Purple Plan repairs finishing dusty frameworks hanging think AMA should have Purple Plan badge could wear proudlyor pin rear buddy cant get acttogether now alas probably 50% remember did see column year ago Purple Plan important tote keeps up well have rerun item Ive now applied flying keep saying Wait till next year next year field muddy early spring winds blow gets tco hot gets windy again too cold Once snow sleet fog no excuses October sometimes late September November later golden days Like Ba hamas wind III can get two perfect October days makes up year worthwhile make another plane two over months via Purple Plan flying career goes FLYS GREAT IDEAL BEGINNERS AIRPLANE THAT BUILDS IN HALF THE TIME Jig built balsa fuselage 90% Built wing Excellent instructions first time builder Full size plans Decal forms windshield JOHNNIE CASBURN MANUFACTURING CO 5115-SE E Rosedale Fort Worth TX 76112 Day 817/451-7537 t 817/572-1452 always another golden October modified Rookie Enya fourstroke 60 sat unpainted nearly year flies beautifully thrust torque its 14-6 8300-8500 awesome especi ally pulling through tight slowed up close-in aerobatics wont fly helper reminds crewing Giant Scale Aristocrat 18-6 prop 7000 rpm need two-hand hold remote glow plug battery connection must things would simpler years Ive requests plans Rosenstock see ads has plans early-1960s version youll able get plans new Model Builder before too long bought first kit cant believe Midways Dennyplane want build think aluminum-cowled round OldTimer has dream too years wood cutting first rate plans something else old-timer old-fashioned plan always some mistake few details doesnt matter since need lines pin down spars longerons etc plan certainly authentic mid-30s box has original Dennyplane labels picture Denny himselfwith goggles Typical day theres block listing guys drew traced whatever signed off including ol Reggie himself some other modem names No cross sections no rib patterns outline side view. s way Im delighted know fineflying ancient model actually looks like airplane took plunge because showed pictures Dennyplanes got me. may go first Sigs new Kaydet Senior big bird trainer bigger Eagle three channels lots openframe stuff fuselage once flew planes like 19s rudder-only control almost no elevatorsnot throttle have aileron jobs already know can enjoy floating around like bird soaring heavens isnt very windy Designer Claude McCullough has going back silk dope can Continued page 147 May1986143 CD CD 0 z 0 z 0 C/ 0 -u 0 -u m m 0 Q H CD n 0 0 C/ 0 C, 0 0 31 0 ThJ Lr N CD C, N x x x x x 01 x x x U Available NowThe New Breed Sachs/DolmarLightst weight hand start ready-to-mount engines market 31 $27500 34- $34500 37 $35500 42- $37500 Engines Complete Nothing Extra Buy Choice points 1SIba2z-SYaHP34-5Ibsftoz-65P37-SIhs4oz-CtaHP42-5Vjs3oi-7MP CDI IgnitionOption engines Throttle-coupled spark advance Features CustomIz newest German engines parts ler t ting Bolts sure Tap smoke Carburetor Linkage Ignition ICH Eiectronicsl Ignition Peck ty Switch lt Hub stor Spk Pigs Warranty Fauity Parts Workmanship T G Mfg 857 High Mountain Rd North Haiedon NJ 07508 e 201 427-3845 Plane Talk/Winter Continued page 143 enjoy does will use spoilers see article February issue plan new wrinkle hate install ailerons tape Bill Evans now AMA Museumcompany demo Slow Motion Electric Astro 25 14 cells 12 Ah capacity conned Bill roaring success direct driveaerobatics plus soaring over hour high-speed inverted flybys got five-year-old kid fly attention wanderedyou could see him watching other airplanes Yet Slow Motion sailing wide circles wide open piped 60 Desperado Evans hates stabilizers Des perado published April 1984 issue magazine has cathedral huge towering tail Stable rock course does what consider fearful high-speed aerobatics film paused ask wanted 60-powered Desperado subscribe old-fashioned explanation dihedral works plane could fly would nearly unflyable tractable Slow Motion published MA Ive told Bill could spec version match SloMo fine now has picture Dasher 60and like am willing tackle 60 Dasher max 40 power What am saying Actually Id feel good hot 25but am double-dared 74 tape showed Giant Scale CAPso pretty Look close gosh no stabilizer flights tape better what can stab Its called T-CAP slowed-up tendencies CAP stall vanished stab Slow slow fly bys tips quivering Yes hot Tschirgis crazy giant tailless Stik wonders bother making boring tail surfaces Airfoils CG locations make possible things see Thank Lord Purple Plan golden Octobers Bill Winter 4432 Altura Ct Fairfax VA 22030 Can talk ask pictures returned accompanying envelope obviously cannot use wonderful things Dont have negatives making prints ones send wont priceless Others would like see please include stamped pre-addressed envelopes least stamp Try use influence postman wont ask excess postage responding advertIsers mentIon read aboutthem ModelAviation Radio Technique/Myers Continued page 43 utor Salt Lake City area fourchannel two-stick 75 MHz radios stock time said Go ahead wont make difference also talked established hobby shop owner nearby village told RC airplanes dont sell around cant keep enough off-road RC cars stock first radio went back distributor its easy see retailers arent bad guys situation hope see suggested Bob Aberle back 1982 fre quencies divided mentioned again column June 85 discussed AMA Frequency Committee meeting November 85 reiterated John Prestons column April 86 issue wit Weve got get manufac turers permanently mark 75MHz radios use aircraft 72 MHz radios Aircraft Only right factory markings arent permanent arent put factory wont have effect probably wont happen until 1988 shared channels go away think ought put some effort making happen Ive really buried letters Please Introducing. irekIIn RIC Idle-Bar Glow Plugs Long Short Also.Only $169 Traditional line non-idle bar Glow Plugs a Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $129 Swanson Associates PO Box 151 Wayne NJS948 07470 m Custom Built Models 2036 N Thorn Ave Fresco CA 93704 em 6 pmOrder Phone 209 233-1050ask Bill If you LOVE fly HATE build Contact e solution probleml Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc - IF1yWhatIBuu1d May1986 147 lie Koush Laser Kit TG Reg $24995 hardware -$27995 SYNTHETIC LUBRICANTS CASTOR LUBRICANTS POWER ADDITIVES FREE CATALOG INcODUCT INFOTIPS UDES~ 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