Bill Winter _____I3 EO 0 Plane Talk_______ OFF TO SEE THE WIZARD PA system blasted Light Horse Cavalry Overture Continentals 727 leaned its California leg out Denver hub West days Continental gimmick iron bird human terms Cross goal line leap hurdle lift bale Rotation music stopped Clapping hands cheers Seat belts prevented standing ovation Touch down Ontario came overture reach its wild climax magic carpet turned onto taxiway Encore Super ghostly 727 making music endlessly crisscrosses snowy peaks Jack Benny land Anaheim Azusa Cucamonga Watch step Cucamonga plane doesnt land Actually Rancho Cucamongaonly few miles Ontario Airport sitting patio February staring cardboard cutout mountalns 94 dry degrees shade enough whiten steers skull Incognito escape dead-stick mind Bill Evans found wizard wings 250 miles away Bishop fullsize sailpianers famed standing wave will loft 40000 ft beyond would budge although Dasher 40 crazy Des perado speeded-up modified Krackerjac tail Guys ribbed him much went fishing two weeks High Sierras Ill send friend Arrow pick up got foggy four days early morn beamed up patio announce will fly Gadzooks Fog now houses everywhere Guys thereeast south Los Angeles like strolling street players used work North Chicago family-style oases ends streets Three blocks away could fly Electric no fuss Ten minutes drive found nearly mile square flat field throughway far enough off safe Douglas plant distance paved highway fly off curbed lines car appearing distance about 20 min utes Small groups pairs trios kept arrivingmaking few flights departing join other similar groups Never saw club field hotshot pilotexcept Wizard Bill Evans Some dont see model magazines much else guess have ball hacker menagerie taught guy fly lickety split No knew either Evans Just two boys thought flying 60 Desperado mixed up version radar-timed police air show average roughiy 170 mph two runs upwind downwind long diving entries found critter has piped K&B 21 making similarly piped version K&Bs new plainbearing engine grudgingly agreeing bit span Trust keeps saying After view ing videotape 60 tape now AMA Museum AMA Executive Director John Worth muttered thing violates thing weve taught Dont think flying wing unstable stabilizer essential anhedral does workor technical articles diagram principle dihedral thing violated aerodynamic laws being immutable mind-set us have about everything familiar Seeing believing air ocean downwind turns and. some other time Youll remember 6-ft-plus Krackeijac itself modified early smaller threechannel ship 60s recent spoiler article Evans discussed 3141 airfoil evans Cranks up K&B piped 21 version Desperado prior Winters foray Star Wars found strange bird possess both neutrai go-where-you-point-it hands-off stabiiity no-taii detente know Evans kept Kracker jac after offering ship East whereas Winter has exact dupilcate Desperado lifting section two-thirds thickness above centerline provided l1 angular difference between wing/stab 20 dihedral skinned-foam wing tail OS 60 power Nice indeed got fly have Desperado mind has severe anhedral huge billboard vertical flying wings go like scat D unique stays pointed having flown found pussycat used high cruise also hands-off stable strange docile quick sport job bash around Sundays As easy fly conservative wingy cabin Krackeijac Desperado probably builds one-third time No orientation problems weirdly-configured wing until got too far out going away fog fringes suddenly looked like three-bladed prop Which two blades wings left two right two bottom two knew what next Since would sit handed transmitter Evans word Orientation 200 yards off no brave old pilots Space glorious space Psyched up back future Iknew Icould fly aerobatics Californiais Land Can Virginia Land Cant Back little flying site nice know am 20 years younger Aerobatics did high-jinks go 34 Modet Aviation After Bill Evans enticed Winter building Evans orange Krackerjac framed against genteel version Simitar flying wing snow-topped peaks Bishop ver old boy pound flesh Evans sion has balsa-skinned foam wing stab buiit new version Krackerjac a %l/ foil 1 1/2 decalage fiaperons stabilizer bitter pill swailowi Un- OS 60 Locals ribbed theflying-wing man expected fate brought two together badly go fishing two weeks some pisin fun flying under low thin fog mile square field just south LA Pleasure find Don Lefferts didnt have look very hard find Brown Teico CO-2-powered Mirage FF Plc shows blown-up version larger Herkimer CO-2 After WW ii engine mass production columns custodian sees good ies everywheresuch turbulator spars lines Fubars Ramrods San Diegans Left Whats different about Goldberg J-3 Cub its beautifuily built chocolate sprinkies thats ciuc Builder Dave Peitz isa member AMAs Sound Committe decided evaluate noiseless Scale model Hidden between cylinders its dummy twin Astro geared 40 whIch spins 13-8 Rev-Up 61/2 7 mm realistIc power flight Oh yes has soared Its all-up weight 91/i lb Right cowl removed removable ply box mount shows firewall extended forward Front plate 1/4-ln ply holed cooling Because motor has protruding brushes inserts rearhence bolt-on box Dave uses Teie-Tach measure rpm flight telemetry allowing precise prop comparisons Condor Hobbles device utilizes tiny transmit ter plane photocell pickup reads rpm through hole cowl Data transmitted hand-held meter ground Left inside story Three rows six 1 2V cells iSin Pack rests four1/s-in-sq pieces glued floor 3/4-in-sq across fuselage rear pack prevent sliding similartop crosspleces fitted under ply longerons hold-down Internal antenna attached strip runs aft strengthen gear accurate tracking wires attach ply fairings smail metal cable clamps Electric J-3 required downthrust considerable right Peltzs mods will added Goldberg plans Right asked what type four-stroke has Dave replies Wililams/Astro 40 aboutthe small exhaust pipes explains keep quiet heturns motor curious filp out Engine made fourWilliams Wright cylinder kits scrap balsa Tached 6250 rpm ground itturns 7250 air man named Gus mention Dr August Raspet discussion Al Backstrom MA April brought back flood memories Howell W Gwin Jr writes Beaumont TX went high school son David Starkville MS graduated Mississip pi State 1959 degree English remember Dr Raspet well about dozen us modelers Starkville profited Dr Raspets interest took same delight models did Richard Johnsons RJ-5 Although leading authorities boundary layer control always time talk airplanes us Id hate count number models constructed part scrap pile shop primarily interested Towline Gliders PAA Load inthose days Ihada Left Picture-perfect Schweizer John Hartafleld spans 6 ft weighs 4 lb has 600 sq area 20 OS four-stroke turns Graupner 1 031/a prop Locals wondered enough power pull John wonders will make stow plane ilke original Right Black pinstriping sets off modified plastic canopy emphasizes edges pretty orange-and-white color scheme Dummy cylinder gives authentic twin opposed look thats 0S side-mounted right Neatly painted pliot earphones scans realistic instruments August 1986 35 Left Winter lecturesthe Munchkln piioon iaiurs latest masterpiece 75-in Chinook Canadian uitraiightkita German import redand-white Scale museum piece model flies like trainer its 05 40 four-stroke pusher Right Removable canopy home helmeted pilot comes kit can look instrument pylon feet Metal tail boom struts some tough plastic plywood Left Covered painted trimmed reflections dancing polished surfaces Pilot seems have left hand tiller-type control slight pointed-down tilt thrust line Rudder pushrod external elevator rod appears hidden inside tall boom Right Precisely fitting ply pieces auto-align key mid-ship structure Including pylon takes two wing panels flush ala gliders Thermic 50X showing basics drag reduction helped get 301 glide ratio out designed propeller shroud Jasco Payloader Spitzy 045 vibrated too much lent us copies Frank Zaics yearbooks admitted freely learned great deal Zaic wasnt scholarly books about aerodynamics taught us about stability drag reduction Reynolds numbers knowing born teacher never lost enthusiasm sheer wonder flight dont think ever quite sure whether old solid wood Scientific Control Line models really airplanes always interested what did encouraged us build plastic models fly college swimming pool learn effect various control settings Gwin continues also streamlined clay get better glide performance almost drowned process Dr Raspet said could see airflow put potassium permanganate nose leading edges pool declared off-limits models very soon afterthatIwonder Dr Raspets Purple Plan loved soaring considering purest possible form flight used gliders research Some early activities involved chasing buzzards Sailplane movie camera Gus Raspets Buzzard Patrol well known Starkville still remember lovely calm morning flew over hangar about 300 feet up whistling theme High Mighty Thats decided Lhadto learn fly gliders heard father doubtful about safety airplane no engine took time talk him convince him gliding wasnt dangerous powered flight worked Dr Raspet Aeronautical Experiment Station time con sisted ramshackle Quonset hut blown wings mention often over 300 pinholes per square foot precise grid pattern got very tired pin vise dont remember Tailwind have very fond memories oper ating camera tuft-studies warsurplus flat-top Laister-Kauflnann gliders used research Dr Raspet founder Mississippi State Glider Club provided single-place Schweizer 1-19 glider learned fly glider being towed down runway just below flying speed bodyless 1938 Ford instructor inthe tow car signaled pilot way move stick rudder pedals until became automatic As became expert speed increased until left ground proficiencyand grad uated 100-ft rope 900 turns final step education 500-ft rope gave us enough altitude fly landing pattern point took ourflrst dual instruction Starkville EBO Mason Sumter Pappy Camp flight instructor Charles Lindbergh Dr Raspet lent club Olympia sailplane condition restore ourselves would often stop shop late night either help us just sit drink coffee tell stories Lord did have stories Most us agreed wed rather have Dr Raspet talk peel off old fabric rebuild ribs Ive rambled far too long about guess should stop Howell thinks bot tom line Dr Raspet finest human beings Ive ever met will always special because warmth interest other plane-struck people ages hate presumptuous think Dr Raspet would like being remembered just much tremendous contributions world aerodynamics telling Gwin used word last paragraph may have known him can remember Gus Raspet Fiddler roofTradition Tradition Don Lefferts tapped knee little rubber hammer leg jumped Its gray Mondays inspired go fly circlingbuzzards Lefferts vintage auto restoration otTheat escape models Im mood see going Ive charglng cycling listening sad stories told battery packs just got back Nats Don leads off flew own-design C02 called Image Its sort compilation Old-Timer FF designs stretched pulled shape use Brown Telco-size motors Ive loaned out plans several flying Wouldnt know friend built flies better ship photos large Imageblown up use old Herkimer OK COz motor Bill Browns tanks Au Yes created worlds 36 Model Aviation Left John Oldenkamp San Diego two Lanzo props 18-in version nose 16-in version foreground Smailer proved better performer two Right Stick cabin versions Lanzo combo Text has Oldenkamps OT thoughts famous engine Brown Jr shows great promise also took FF Old-Tinier called Tlush Mite Don goes trying trim Imanaged one-bounce landingintothe side perfectly-restored 1957 Chevrolet parked line 50 ordinary cars belonging ordinary mortals beautifully-finished car belongs Sal Taibi Sal gracious gruff made feel like little kid Fooey Ed Restored isnt quite correct word Sals old car Maintained would better Sal original owner has driven continu ously since car new Fooey no doubt way vintage car guy would feel about himself clobbering Sals classic massive C02 Sal always gracious seemingly gruff Don flown i-scale Laser car would have seen gruff Jd bet Mr Tradition Taibi inter ested rendition ye olde pylon FF An Ebling Phoenix-like fuselageflat bottom sweeping curved top Surfaces remi niscent Fubars Ranirods San Diegans ancient thick undercambered alr foil prior 1950 foiks like Pete Andrews John Zalc Frank Ehling went climb then-thin lO-percenters knife-sharp lead ing edges Stab tilted RCers No cockeyed up right glides right tricky skinny pylonextending down fuselage bottom Does lean typical right power turn turbulator spar top bottom mains another aft bottom spar Golden Age polyhedral pop-up tail fuse de thermalizer Sal gonna park antique near crazy Free Flighters youll need gruff act havent made twisting climbers slow-motion glides since early SOs RC means no chasing early SOs RC planes usually crashed flew away made chas ing ridiculous Ive notions FF unlike Lefferts fun critter old Fire cracker MAN Pasture flights evening swarms barn swallows harassing its silent circles see now 035 electric motor five 500 mAh cells would need bit biggerjust rudder control retrieval shutoff maybe prevent seeding clouds Can get away Bob Kopski thing fascinates about Dave Peltzs not-too-modified Golderg J-3 Cub Electric power something might expect ingenious Sailplaner mastery computers knows geared Astro 40 cobalt 18 cells 12 Ah capacity turns its Rev-Up 13-8 prop precisely 7250 rpm horizontal flight 6250 ground Missouri Well son guy meas ures in-flight rpm via telemetry Condor Hobbies Tele-Tach consists tiny transmitter mounted plane tiny photocell pickup taped motor facing forward sees prop turning through bottom hole cowl Data rpm trans mitted handheld meter know this 1000 ground/air rpm dif Continued page 22 Y BI t x B2 -A-~1~ Y *1 B3 C Winters brain teaser month Figure standard expianation dihedral works B2 figure seems suggest anhedrai wouid unstable People like Evans have proved though case See text discussion August1986 37 Digital LCD tachometer has dual scale lox-i oox stable RPM readout Full scale voltmeter can used check/cycle TXIRX battery combos Reads load up 20 voltsand DC ammeter used check servo current Will find worn binding stalled servo conditions w/SCA1 Battery included 90 day warranty 4 Function ACCU-TACH $8995 ACCESSORIES OSAl -Quarter Scale Adapter ATi & AT2-500ma load.995 SCAl -Servo Current Adapter Airtronics Futaba Kraft 995 TLB1-Voltage Probes.295 CC1-Carrying Case will hold ACCU-TACH accessories. 1295 Send check MO NorCal Avionics A-B Tech Inc 5689 Glasgow Troy MI 48098 313 828-8210 MI add 4% tax Add $3 S&H See dealer first ATT- CHEKi ON-Board Battery Tester Saves Time. Saves Models BAiTCHEK RX-1 ein 5 usA Special Month 3/32x4x36 C Price good until Aug 1 1986 Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Protune corp 914 4626452 PO Box 1808 Poughkeepsie NY 12601 AMA CLUBS Ask about AMA Club Discounts minimum orders $10000 12020 Cent ralia Hawaiian Gardens CA 90716 213 865-3220 ference roughly one-sixth what wed tack ground takes guesswork out propunloading daily lotto game quite edge Dave accurately comparing props right now date finds Rev-Up better others tested farprobably due its thinner airfoil thinks As will see pictures J-3 nifty often stared bouncing gas indicator front windshield fullsize Cubso depressing short cross-country hops against wind cars would pass Using servo-actuated switch Daves J-3 gets 6 7 mm motor run has thermaled now Astro controller throt tle probably giving him 10- 1 1-mm run plus whatever glide time can get Climb realisticwhich what wish match type have sense scalelike flying 13-8 7000 has surprising brute pull hefty torque Peltz cautions everyone Electrics prop hitting dainty hand wont stop like glow engine therefore have arming switch Thats gospel Carl Goldberg Electric run wild adjoining room 3 am gets out bed no arming switch forgot turn off receiver weve done airborne pack faded dutifully turned on/off switch did hear guy Giant Scaie gassie started its Quadra way night didnt Pelts found electrified Cub required additional downthrust significantly right thrust gross 9 lb handled easily gear beefed up ensure accurate tracking ground handling tail wheel wire bent ard decrease ground-stance anglewhich also improves ground handling true tail-draggers Taking Tony Nacca ratos advice hes master big-scale Elec tics Dave twisted out both tips starting about two-thirds semispaninsurance happen slow up too much higher wing loadings Dave built J-3 because AMA Sound Committee As Sailplane man knows about silence does seem relate subject J-3 valid tool among others unpleasant war keep flying sites Dave gets asked about tiny stacks scalelike dummy engine big enough show easily runs turns switch find average Joe has never seen Electric Such guys dont believe thrust permitted hold J-3 Too heavy fly say Eating-crows getting scarce Daves summary noise prob lems facing future think Electric flying has grow popularity present weakness still batteries heavy energy limiting However expect well see some improvement area next few years will short time Electrics performance has doubled due better motors improved battery technology Incidentally Carl Goldberg Models expec ted add considerable Electric information kit plan because Pelts findings John Hartsflelds Schweizer tow plane speaks have published pictures series experimental RC low-wingers big its power pleasing perform ance K&B/Veco 19 spans 6 8 ft time got plan requests Hands-off soaring main objective three channels couldnt quite get combinationthough know now should have enough dihedral put tips line lower edge cockpit Continued page 130 38 Model Aviation NEW Balsa Spruce Plywood Mon Fri Kit Mfg match current prices 8am -4pm now paying better quality PST Open Public 40-60% Discounts BE PART OF AVIATIONS ANNUAL REUNION.. INVITATION TO YOU can help assure com memoration historic achievement continues opportunity par ticipate important ceremonies Societys other programs made available people young old As member will receive Societys quarterly newsletter FL YER will invited member tend participate December 17 ceremonies Memorial First Flight Luncheon unveiling honoree First Flight Shrine As member will have unique role helping assure pur poses Society met important work First Flight Shrine continues recognize honor have accomplished significant firsts aviation people might enjoy membership Society participation its programs informed opportunity PU RPOSES First Flight Society non profit memorial educational torical organization incorporated State North Carolina Its history traces 1926 Societys objectives organize conduct sponsor cosponsor promote otherwise cause appropriate ceremonies events held annually anniversary site elsewhere commemorating first powered flight Wright Brothers achievements contributions development flight encourage invite promote visits historic site people near far may see first hand birthplace powered flight foster promote public awareness widespread interest origin history future ffight its forms FIRST FLIGHT SOCIETY PO Box 1903 Kitty Hawk NC 27949 N AM P STREET CITY STATE __________ZIP Member $20 Business$l 50 National Corporation$5 00 Dues Contributions tax deductible Sorta Pitts/Shepherd Continued page 127 especially model gets air smoker really putting out roses first though took quite few flights get trimmed out model will little different keep mind arrangement shown starting point getting model adjusted fly way want have built flown monoplanes past remember different ball game wont handle same monoplane Have fun Plane Talk/Winter Continued page 38 like Rubber Scale jobs procrastinated doing redesign would have such dihedral nicely-tapered wing still tail-dragger almost spitting image Hartsfields ship romantic open cockpit Hartsfields plane answer anyone wants such aircraft However modest dihedral suggests fourchannel controls grand sport airplane plans MAN published Specs reported John span 6 ft area 600 sq weight 4 lb power OS 20F5 four-stroke prop Graupner l0-3i locals believe engine should pull okay will will beautiful John made dummy cylinder opposed twin look hard tell right-side cylinder working two-wheel gear simple sturdy scalelike cowl removes readily Location vertical tail allows simple one-piece elevator top deck suggests fulllength straight line fuselage dont know canopy stock modified home-brew unless want exact scale could almost anything canopy/open cockpit motif orange-and-white scheme accentuates long graceful wings ship proud Dont worry about climb power eight-footer climbed better six-footer flying wing will get high could possibly wish stab big enough keep bird step warm day supposes could maintain cruise fast idle wont airplane dummy pilot Chlnoolc warm moist southwest wind SP5 St 8I S Iie BENTOM BHOWN JH CAMIjilLL COMET- COVERITE DUBRO EAsv BUILT MODELS ENYA FAt FLYLINE Fox GOLDBERG- GOLDEN AGE REPRO IGENE DUBOIS- GUILLOW- K&B- K&S L R AX PACTRA- PECK-POLYMER PERFECT RN MODELS SEAGLEN SIG STERLING SULLIVAN SUPER TIGRE TAFFINDER TELCO- TOP FLITE WILLIAMS & OTHERS IESTES MODEL ROCKETS Send $100 Cash Check cc Stamps fop osac 44 page tabloid sise DISCOUNT Catalog 900 itlustraionsover 700 Kits choose MAILORDER PHONEORDER IN STORE ILLET 30137 CENTER am St LauudalmFa 19445 coast Oregon northward descends eastern faces Rocky Mountains Its appropriate name ultra-nice ultralight does explain peculiar lack awareness ultralights among us least two fine magazines filled full-color pictures reports projects just like other home-builders magical craft factory-produced kits flyaway planesthings like 50 mph lookalike Cub Citabria have images hang gliders grasshopper cuties open-air stuff wires struts over placeand immensely popularyouve missed boat Ive met first enclosed ultralight model flesh Im fascinated Kaluf blew red-and-white pusher lovely canopy big enough family goldfish Also Stoip Starlet buy locals word should law against anyone builds like spans 78 has 914 squares 40 two- four-strokes has OS four-stroke four channels Its Scale kit Canadian ultralight imported Germany means exquisite engineering requires patient assembly ingeniouslyfitted parts cut what seems like micrometer exactness Believe dont give tinkers damn about commercial plugs unvarnished reporting European plywood can different use whatever woods best suit purpose such limewood Plastics different strange-looking/smelling glues stick absolutely anything Enough photos deserve scrutiny Incidentally Bill Kaluf generally takes three months classic flying machines says complicatedlooking thing done six weeks half usual time wont take questions will forward letters Ships legend empathize fully peaks valleys starts off John Oldenkamp San Diego CA having growing up poor doing aeromodeling vacuum wait until 40th year witness True Flight ie Loss Airplane Through Thermal Activity acronym LOATTA have nothing against RC just have yet graduated finger control have Airtronics Monarch boards Project tonight John warms up tissuing 1937 Lanzo Combo Stick/Cabin jobfar too much time drawing up Zaic threeview bending hoops ribs teeny spars dog got up bench after housefly smushed whole tail Rebuilt recovered first red airplane Fourteen pieces paper wings beaut Two gigantic hand-carved freewheeling props 130 Model Aviation RON CHIDGEYS TIGER TAIL 4 ggg sq Sasic Kit 5118 Fihsqt.s Ps P. C vallatIs doss ml CABiN RIC PRODUCTS 112 IttaIs St Idaysts LA 71505 318 2327448 BYRON ORIGINALS E PCI lly. Practical Twin Ducted Fan Project Thousands satisfied modelers currently flying Byron Originals jets serve proof release kit can sure project can confidently build fly st dream designed built flown its designer few others new F-iS Eagle no exception F- 15 designed around proven Byro-Jet Propulsion System its twin Byro-Jet Fans turning nearly 20000 rpm producing 24 241/2 total pounds thrust Eagle delivers speed rate climb maneuver ability expect Byron Originals jet Unique Exclusive Components new F-i 5 far too numerous attempt describe magazine ad Detailed Info Pack includes brochure owners manual set reduced construction drawings kit pricing send $200 Get full story F-i 5 its long list exclusive features Custom Retractable Main Gear lutionary New Nose Gear Design matic Landing Gear Brake System Functional Pneumatic Speed Brake iled Fiberglass Fuselage Factory Installed Formers -in Wings Stabs Fins Precise Construction Methods Specifications wing Span 70channels 5 w/retracts Length 89 7 wls peed brake Ready-to-fly weight 28 lbs lending gear brakes Power - Twin Byro-Jet Performance Systems w/Rossi 81 orequiv Byron Originals Box 279lda Grove IA 51445 Ph 712 364-3165 also red Nice 2-in-dia wheels sanded out filled polished painted black Have set both up bench Since no admire mc share Pretty things Red always preferred yellow Until today Nearly ran out covering paper batch bought 15 years ago Now alcohol-shrink water Warps bad remember Forties nobody ever mentioned alterna tive beasts going get aerobap tism next Sunday over near Las Vegas OldTimer meet Oldenkamp goes VAMPS thing huge dry lake Reservations made Motorbike fueled up ready Have never Im certain will like rendition Lanzo huge vertical tall will blow minds isa pre-something ship defies modernity Looking prop specified judg ment great Chester Lanzo must have out mind quote 18 mill sol made up modest unit 16 high pitch will fly buggers like fly P-30s have sense will take photo graphs before sticking air maybe will rain blow will sit motel just plain talk am puzzled John says whet interest gravitate retrograde devices deep inside know squaretipped flat-bottomed mostly-sheet bird will run circles around what have just spent three weeks a-building eyes fingers hurt have shot up precious stash red tissue am fighting warps inch way Put nasty cut thumb carving props buck knife sucker will probably terminally tail heavy wind up will Mercury Seven Flight Phoenix Wright brothers over again Chester Lanzo hope nice guy four years old Lanzo launched prototype creations six Korda wowed guys back East did know Gas gasoline nor heard Maxwell Bassett interim aeromodeler hordes bridged too-young-to-know period now recognize Golden Age Modeling hoarded glue duringthe scarcity WW II days Balsa diverted military purposes flew paper airplanes out barn top did lot pretending fly airplanes whatever sort interest fueled world events As 12year-olds volunteered painfully scratch out identification models school thrilled whenever stray Selfridge Field P-47 passed over Oh elliptical planforms fat undercambered ribs hundreds hunks fuselage funky wheels bamboo bits Wonders Oldenkamp What wrong people design weird difficult gizmos Thank God now Hot Stuff good wood real razor blades T-pins Celotex building boards like None begins explain still build difficult old models John thinks case Half Korda all-sheet exercise Ed MA plan No 125 $1 75 led chase through Zaic yearbooks looking perfect most-beautiful model first disap pointment course instant discovery Old-Timers featured complex multi-curved outlines dumb fat proportions etc people nuts least current standards Cranks masochists build OldTimers right Ever made Korda Wakefield John asks What winners fly same straight up slight right spiral low dip glide off somewhere usually much need dether malizer Unnerving Spectacular cabin jobs accidents design insofar aerodynamics concerned probably masterpieces romance lore Zaic yearbooks usually listed longest flight achieved particular model fre quently somewhere between 12 42 minutes Powerful binoculars days strong legs maybe chased Model As got job done built flew crashed know did exist art form very much worth effort duplication discovery preservation things once done recreation miasma long since committed various libraries touching process creation however arcane immense delight am digging up past lam basically refaniiliarizing myself moments disappeared over hill far too quickly rush puberty manhood Long live Chet Lanzo Long live rubberband Red airplanes hope curse assumes some time passed before Oldenkamp added PS about flight experiences Rambled off 375 miles Henderson NV over weekend VAMPS Las Vegas Antique Model Airplane Society Annual Nice folks Vast site warm buoyant air hardpacked shiny dirt crust underfoot Magnifi cent mount scarps Stayed funky casino just three miles Hoover Dam sharing space noise Lake Mead drag boat crew WeirdContinued page 135 August 1986 131 F-l5EagI 1/7 Scale Exceptional Performance True Byro-Jet Style. iake-off distance paved runway less 250 feet little practice nose high landings predictable F-iS climbs authority good steady rate has solid positive groovy responsive feel Engine out performance outstanding ight trim changes enable hands-off straight level flight no need land until youre ready Plus Byron F-i 5 offers unlimited scale possibilities its priced com petitively other twin engine jets comparable size E E PERFORMANCE Step-By-Step Instructions lete Rolled Plans rate Machine Die Cut Balsa Spruce Plywood ce Spars Launch Strength TH HAND LAUNCH E HI-START H 59 Span 15 Oz 2 channel 370 Sq Area computer Modified E-193 Airfoil DAVEY Eh1SYSTEMS mwm CORPORATION ONE WOOD LANE MALVERN PA 19355 215 644-6772 Plane Talk/Winter Continued page 131 Lanzos fly Trembling nerves withstanding model got assembled photo graphed loaded modest amount rubber45 grams modem stuff Dry whole model weighed mere 100 grams 300 tenuous turns beast off its maiden voyage stally putted around sorta right kinda up came down near cars dented shiny red prop Darn shouldnt make trim change time appeared ship needed right down thrust plus some weight up front cure stall Added Y16 shim taped quarter nose second flight went up smoothiy same turnsgoing nowhere looking safe turns Risking packed 900 Fortunately lit DT fuse model shot off rapidly climbed throughout entire prop run hooked boomer soon become speck red looked great Itwas up about 7mm landed sight half-mile downwind retrieved foot san dals plopping along dry lake surface certainly thrilled gave toast C Lanzo now know built ancient heap understanding era investigate trace mind handiwork greats build some trust perhaps methods gain perspective probably little respect aeromodeling rootsnot within awareness until now Hope can find red tissue China connection Joe Tschirgi remember tailless Giant Stik May column paid dues retired English teacher Ninjing taken lightly book experts love argue such stuff offers correction make no arguments Just read Subject statement March 1986 issue MA concerning flying planks heavily reflexed airfoil makes stable Facts 1 Airfoil camberpositive reflex inverted zerohas nothing static stability 2 Youre certainly alone belief 9999% knowledgeable modelers surprising number full-scale aero en glneers would agree ie think reflex airfoils have stable center pressure travel Explanation 1 Static pitch stability aircraft rate change pitching moment angle attack 2 conventional air foilsthick thin cambered symmetric re flex inverted flathave constant aerody namic moments usable angle attack range 3 purpose reflex camber tailless configuration provide nose-up moment like angular difference tailed aircraft trims vehicle usable lift co efficient 4 NACA NASAs predecessor habit presenting airfoil Center Pressure defined moment divided lift led misunder standing stopped publishing meaning less confusing data conjunction airfoils over 50 years ago 5 center lift Aerodynamic center AC lift curve slope airfoil section parameters have significant influence static stability Both essentially fixed values AC 25% chord Ct/a0 1 per degree identical very few percent airfoils ie AC does move angle attack Repeat Does move Proof 1 Take old Free Flight wing junk pile Mount stick fuselage big fixed vertical fin aft wing 2 Mount big flat plate drag area about 2i chord lengths above wing Required area depends wing camber the 10% wing good starting point 3 Balance thing 15-18% MAC try hand glide Use usual trimming procedures remem ber drag area same thing angular difference the 4 Youll find thing glides stably inefficiently Obviously least drag area combined aft CG can get away will produce best glide Years ago eminent engineer presented lecture DCRC Club significant number odd configurations model glider form would work among glider suggested Tschirgi Van Hattum retired Holland used similar examples including Joes teaching July-August 1973 issue Junior Modeler Van Hattum published fasci nating article including nine radicals three-views picture achieved Joes result merely using tail vertical square stick projecting aft end fuselage Article title Gliders Nine Going sublime ridiculous heres teaser dihedral Theres diagram dard explanation dihedral works armY longerthan armX lift results Y side plane returned normal flight B 1 plane anhedral stable Yes Consider Evans Desperado quite stable full-scale examples So B2 arm Y shorter arm X Now correct can example B2 stable Shouldnt roll out control Continued page 136 .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74 3 Pak$495 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit5395 P0 Box68132 AIRCRAFT CO Portland OR 97268 Ready Fly$795 Add $3 postage handling first 2 packages 10 additional DGA Designs 0 D0A00 DC Designs 0 0 0 Cs0 0 j C o5 0 0 QuarterMaster 1SPORT BIPE S QUARTER SCALE PLANS Quarter Master Sport Bipe8 1f Guadra 35. 73Spafl.EZ build. Great Flyer.Semi-Ki AvaIlable..PPO 0 DAVIS D-1K sOaSpan. 0 Ouadra 35 power Similar. PPO CC 91933 KINNER SPORTSTER 5Modet K.117Span 035 power pPo5 5 _ oCs 4-CYCLE PROJECTS AKRON FUNK 15 Scale 54 Span deeCs 4 cycle. FantaStic FlyerPPoeI ________0 DAVIS D1K* 603 Spar. cycleorsirnilar..rP051D Two Inch wale Sieth scale _____________0 Cs 1933 KINNER SPORTSTER88 Cs Model K.75 Span. el-75.4cy PPO$ I110 Photo reduced try, Id Scale Plans oro Inch scale SIxth scale ________0 00A Plane0 cowing C PHOTO DOCUMENTATION PACKS available- 0 Scale Plans ALL PLANS ROLLEDSHIPPED UPS Conpleteelnstroctien Booklet Send sl00 Catalog O New York State Residents add 7% sales tao. Send check J o MO Os. Allow 3weoks tOr cflecktocleer Cs mU m] j [Ci st 1986 135 IfyoushouldthinkofslipflOtethatB3 what youd see wing RC pilot OK know better say matter relative wind acting upon dihedraled wings banked turn inside wing has greater angle attack outside stabilizes fun Does centrifugal force play part location CGthat high low pendulum effect What does presence centrifugal force banked turn know nothing Dont ask offer C old-fashioned turn-and-bank indicator instrnment tilted would leftbanked turn slip skid yaw equalized pilot coordination ball cen tered skid greater ball would move toward right side slip greater ball sinks toward left side plane itself can center ball what modelers call spirally stable piloting input required neutrally-stable moreacrobatic craft machine man together still center ball ball will center design has some deficiency difficult fly unflyable Whimsy flat-winged Stik close hands-off FF flat-winged Lacey Fike will fly OK Air three-dimensional often think terms two dimensionslike diagram Drop wing aileron pull upelevator model whips around know wing loadings go sky high high some times small heavy models youll snap out control plane pushing agalnst alr toward outside turn its angle attack affected holding upelevator wing perhaps nearer stall large part due centrifugal force free-to-pivot pendulum hung beneath belly would point wonders about Frank Zaics book Circu lar Airflow available AMA Supply & Service Section wondered about airflow phenomenawith turn-and-banked aircraftmany years ago Ive models would fly themselves around 360add bit nose weight becomes 720 vice-versa until cant hold 360 Such models seemingly can fine-tuned go neutrally stable banked circles yet flying hands-off neither recover ing nor degrading continuous-banked turns Argue leave out dont know nuttinunless name Tschirgi Planes wonderful things Perhaps ought wonder Bill Winter 4432 Altura Ct. Faitfax VA 22030 Radio Technique/Myers Continued page 41 redundant RF link Roland Spicer fascinating person talk pursued dream setting RC cross-country record great care intelligence describes event enthusiasm would credit much younger man can see Roland airplane description flight RC Video Magazine Volume 3 plane scale model Wallace Beerys Bellanca dedicated Rolands lifetime friend Allison Buck can seen hanglng ceiling AMA museum AMA Headquarters building Reston VA Ask Hurst Bowers tell about case havent noticed better times interference- reliability-wise rnshing down us George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Aid/Edberg Continued page 43 forklift required four RC channels launcher required two platform up/down launcher release decided use single transmitter con trol both gadgets same time wouldnt need juggle transmitters running experiment decided use trusty Futaba J Series system needed least six channels available Because two receivers would inside vacuum chamber made 1-in-thick solid steel walls felt using J Series quite reasonable transmitter shown behind forklift shots way radio signals get through receivers inside chamber through small Plexiglas window concerned two receivers same fre quency might interfere other both RC systems performed flawlessly through testing As far know first time model RC system has operated vacuum two receivers sub jected share electrical noise motors powered both forklift resetting mechanism launcher noise did affect operation receivers made big racket FM receiver used gather data telemetry system later found out several companies manufacture brushless DC motors supposed operate vacuum out generating electrical noise Next time Im using vacuum Ill give try Both forklift launcher pow ered sealed lead-acid D cells having 4 Ah capacity huge batteries known safe operate vacuum recharged after days testing constant-voltage charger case forklift extra weight lead-acid cells helped provide extra traction driving around foam rubber However often quite enough made snow tires pushing staples facing outward through tires cured traction problem launcher forklift arrangement worked extremely well After bit practice became proficient enough two oould have specimen back top launcher within 2 minutes may seem long time until consider specimen bounces ran domly foam-rubber-covered floor takes 90 seconds just recycle launcher case much less time 20 minutes needed recycle vacuum chamber wont go details results testing because really terest people field space craft dynamics will say results good enough Stanford award 136 Model Aviation Eke. Quality r S 937 x 156 x 175 18 oz 46 oz torque Years development have produced finest state-ofthe art receivers ever made Flight tests over country haveThe workhorse Ace servos Perfect Patternships Quarter Scale Boats Cars proven receiver will fly others fail Solid glitch-freeapplication high power required performance air plane attitude frequencies/channelsLIIIIIJ 14G20AAtlas Servo Kit$2395 Available Z7 50 53 72 75mHzAC 14G2OACAtlas Servo assembled$3146 12G70 Silver Seven Receiver Kit$3895 Available dealer order direct add $200 Ace RIC 116W 19th St Box SuB Higginsville MO 64037 816 584-721
Edition: Model Aviation - 1986/08
Page Numbers: 34, 35, 36, 37, 38, 130, 131, 135, 136
Bill Winter _____I3 EO 0 Plane Talk_______ OFF TO SEE THE WIZARD PA system blasted Light Horse Cavalry Overture Continentals 727 leaned its California leg out Denver hub West days Continental gimmick iron bird human terms Cross goal line leap hurdle lift bale Rotation music stopped Clapping hands cheers Seat belts prevented standing ovation Touch down Ontario came overture reach its wild climax magic carpet turned onto taxiway Encore Super ghostly 727 making music endlessly crisscrosses snowy peaks Jack Benny land Anaheim Azusa Cucamonga Watch step Cucamonga plane doesnt land Actually Rancho Cucamongaonly few miles Ontario Airport sitting patio February staring cardboard cutout mountalns 94 dry degrees shade enough whiten steers skull Incognito escape dead-stick mind Bill Evans found wizard wings 250 miles away Bishop fullsize sailpianers famed standing wave will loft 40000 ft beyond would budge although Dasher 40 crazy Des perado speeded-up modified Krackerjac tail Guys ribbed him much went fishing two weeks High Sierras Ill send friend Arrow pick up got foggy four days early morn beamed up patio announce will fly Gadzooks Fog now houses everywhere Guys thereeast south Los Angeles like strolling street players used work North Chicago family-style oases ends streets Three blocks away could fly Electric no fuss Ten minutes drive found nearly mile square flat field throughway far enough off safe Douglas plant distance paved highway fly off curbed lines car appearing distance about 20 min utes Small groups pairs trios kept arrivingmaking few flights departing join other similar groups Never saw club field hotshot pilotexcept Wizard Bill Evans Some dont see model magazines much else guess have ball hacker menagerie taught guy fly lickety split No knew either Evans Just two boys thought flying 60 Desperado mixed up version radar-timed police air show average roughiy 170 mph two runs upwind downwind long diving entries found critter has piped K&B 21 making similarly piped version K&Bs new plainbearing engine grudgingly agreeing bit span Trust keeps saying After view ing videotape 60 tape now AMA Museum AMA Executive Director John Worth muttered thing violates thing weve taught Dont think flying wing unstable stabilizer essential anhedral does workor technical articles diagram principle dihedral thing violated aerodynamic laws being immutable mind-set us have about everything familiar Seeing believing air ocean downwind turns and. some other time Youll remember 6-ft-plus Krackeijac itself modified early smaller threechannel ship 60s recent spoiler article Evans discussed 3141 airfoil evans Cranks up K&B piped 21 version Desperado prior Winters foray Star Wars found strange bird possess both neutrai go-where-you-point-it hands-off stabiiity no-taii detente know Evans kept Kracker jac after offering ship East whereas Winter has exact dupilcate Desperado lifting section two-thirds thickness above centerline provided l1 angular difference between wing/stab 20 dihedral skinned-foam wing tail OS 60 power Nice indeed got fly have Desperado mind has severe anhedral huge billboard vertical flying wings go like scat D unique stays pointed having flown found pussycat used high cruise also hands-off stable strange docile quick sport job bash around Sundays As easy fly conservative wingy cabin Krackeijac Desperado probably builds one-third time No orientation problems weirdly-configured wing until got too far out going away fog fringes suddenly looked like three-bladed prop Which two blades wings left two right two bottom two knew what next Since would sit handed transmitter Evans word Orientation 200 yards off no brave old pilots Space glorious space Psyched up back future Iknew Icould fly aerobatics Californiais Land Can Virginia Land Cant Back little flying site nice know am 20 years younger Aerobatics did high-jinks go 34 Modet Aviation After Bill Evans enticed Winter building Evans orange Krackerjac framed against genteel version Simitar flying wing snow-topped peaks Bishop ver old boy pound flesh Evans sion has balsa-skinned foam wing stab buiit new version Krackerjac a %l/ foil 1 1/2 decalage fiaperons stabilizer bitter pill swailowi Un- OS 60 Locals ribbed theflying-wing man expected fate brought two together badly go fishing two weeks some pisin fun flying under low thin fog mile square field just south LA Pleasure find Don Lefferts didnt have look very hard find Brown Teico CO-2-powered Mirage FF Plc shows blown-up version larger Herkimer CO-2 After WW ii engine mass production columns custodian sees good ies everywheresuch turbulator spars lines Fubars Ramrods San Diegans Left Whats different about Goldberg J-3 Cub its beautifuily built chocolate sprinkies thats ciuc Builder Dave Peitz isa member AMAs Sound Committe decided evaluate noiseless Scale model Hidden between cylinders its dummy twin Astro geared 40 whIch spins 13-8 Rev-Up 61/2 7 mm realistIc power flight Oh yes has soared Its all-up weight 91/i lb Right cowl removed removable ply box mount shows firewall extended forward Front plate 1/4-ln ply holed cooling Because motor has protruding brushes inserts rearhence bolt-on box Dave uses Teie-Tach measure rpm flight telemetry allowing precise prop comparisons Condor Hobbles device utilizes tiny transmit ter plane photocell pickup reads rpm through hole cowl Data transmitted hand-held meter ground Left inside story Three rows six 1 2V cells iSin Pack rests four1/s-in-sq pieces glued floor 3/4-in-sq across fuselage rear pack prevent sliding similartop crosspleces fitted under ply longerons hold-down Internal antenna attached strip runs aft strengthen gear accurate tracking wires attach ply fairings smail metal cable clamps Electric J-3 required downthrust considerable right Peltzs mods will added Goldberg plans Right asked what type four-stroke has Dave replies Wililams/Astro 40 aboutthe small exhaust pipes explains keep quiet heturns motor curious filp out Engine made fourWilliams Wright cylinder kits scrap balsa Tached 6250 rpm ground itturns 7250 air man named Gus mention Dr August Raspet discussion Al Backstrom MA April brought back flood memories Howell W Gwin Jr writes Beaumont TX went high school son David Starkville MS graduated Mississip pi State 1959 degree English remember Dr Raspet well about dozen us modelers Starkville profited Dr Raspets interest took same delight models did Richard Johnsons RJ-5 Although leading authorities boundary layer control always time talk airplanes us Id hate count number models constructed part scrap pile shop primarily interested Towline Gliders PAA Load inthose days Ihada Left Picture-perfect Schweizer John Hartafleld spans 6 ft weighs 4 lb has 600 sq area 20 OS four-stroke turns Graupner 1 031/a prop Locals wondered enough power pull John wonders will make stow plane ilke original Right Black pinstriping sets off modified plastic canopy emphasizes edges pretty orange-and-white color scheme Dummy cylinder gives authentic twin opposed look thats 0S side-mounted right Neatly painted pliot earphones scans realistic instruments August 1986 35 Left Winter lecturesthe Munchkln piioon iaiurs latest masterpiece 75-in Chinook Canadian uitraiightkita German import redand-white Scale museum piece model flies like trainer its 05 40 four-stroke pusher Right Removable canopy home helmeted pilot comes kit can look instrument pylon feet Metal tail boom struts some tough plastic plywood Left Covered painted trimmed reflections dancing polished surfaces Pilot seems have left hand tiller-type control slight pointed-down tilt thrust line Rudder pushrod external elevator rod appears hidden inside tall boom Right Precisely fitting ply pieces auto-align key mid-ship structure Including pylon takes two wing panels flush ala gliders Thermic 50X showing basics drag reduction helped get 301 glide ratio out designed propeller shroud Jasco Payloader Spitzy 045 vibrated too much lent us copies Frank Zaics yearbooks admitted freely learned great deal Zaic wasnt scholarly books about aerodynamics taught us about stability drag reduction Reynolds numbers knowing born teacher never lost enthusiasm sheer wonder flight dont think ever quite sure whether old solid wood Scientific Control Line models really airplanes always interested what did encouraged us build plastic models fly college swimming pool learn effect various control settings Gwin continues also streamlined clay get better glide performance almost drowned process Dr Raspet said could see airflow put potassium permanganate nose leading edges pool declared off-limits models very soon afterthatIwonder Dr Raspets Purple Plan loved soaring considering purest possible form flight used gliders research Some early activities involved chasing buzzards Sailplane movie camera Gus Raspets Buzzard Patrol well known Starkville still remember lovely calm morning flew over hangar about 300 feet up whistling theme High Mighty Thats decided Lhadto learn fly gliders heard father doubtful about safety airplane no engine took time talk him convince him gliding wasnt dangerous powered flight worked Dr Raspet Aeronautical Experiment Station time con sisted ramshackle Quonset hut blown wings mention often over 300 pinholes per square foot precise grid pattern got very tired pin vise dont remember Tailwind have very fond memories oper ating camera tuft-studies warsurplus flat-top Laister-Kauflnann gliders used research Dr Raspet founder Mississippi State Glider Club provided single-place Schweizer 1-19 glider learned fly glider being towed down runway just below flying speed bodyless 1938 Ford instructor inthe tow car signaled pilot way move stick rudder pedals until became automatic As became expert speed increased until left ground proficiencyand grad uated 100-ft rope 900 turns final step education 500-ft rope gave us enough altitude fly landing pattern point took ourflrst dual instruction Starkville EBO Mason Sumter Pappy Camp flight instructor Charles Lindbergh Dr Raspet lent club Olympia sailplane condition restore ourselves would often stop shop late night either help us just sit drink coffee tell stories Lord did have stories Most us agreed wed rather have Dr Raspet talk peel off old fabric rebuild ribs Ive rambled far too long about guess should stop Howell thinks bot tom line Dr Raspet finest human beings Ive ever met will always special because warmth interest other plane-struck people ages hate presumptuous think Dr Raspet would like being remembered just much tremendous contributions world aerodynamics telling Gwin used word last paragraph may have known him can remember Gus Raspet Fiddler roofTradition Tradition Don Lefferts tapped knee little rubber hammer leg jumped Its gray Mondays inspired go fly circlingbuzzards Lefferts vintage auto restoration otTheat escape models Im mood see going Ive charglng cycling listening sad stories told battery packs just got back Nats Don leads off flew own-design C02 called Image Its sort compilation Old-Timer FF designs stretched pulled shape use Brown Telco-size motors Ive loaned out plans several flying Wouldnt know friend built flies better ship photos large Imageblown up use old Herkimer OK COz motor Bill Browns tanks Au Yes created worlds 36 Model Aviation Left John Oldenkamp San Diego two Lanzo props 18-in version nose 16-in version foreground Smailer proved better performer two Right Stick cabin versions Lanzo combo Text has Oldenkamps OT thoughts famous engine Brown Jr shows great promise also took FF Old-Tinier called Tlush Mite Don goes trying trim Imanaged one-bounce landingintothe side perfectly-restored 1957 Chevrolet parked line 50 ordinary cars belonging ordinary mortals beautifully-finished car belongs Sal Taibi Sal gracious gruff made feel like little kid Fooey Ed Restored isnt quite correct word Sals old car Maintained would better Sal original owner has driven continu ously since car new Fooey no doubt way vintage car guy would feel about himself clobbering Sals classic massive C02 Sal always gracious seemingly gruff Don flown i-scale Laser car would have seen gruff Jd bet Mr Tradition Taibi inter ested rendition ye olde pylon FF An Ebling Phoenix-like fuselageflat bottom sweeping curved top Surfaces remi niscent Fubars Ranirods San Diegans ancient thick undercambered alr foil prior 1950 foiks like Pete Andrews John Zalc Frank Ehling went climb then-thin lO-percenters knife-sharp lead ing edges Stab tilted RCers No cockeyed up right glides right tricky skinny pylonextending down fuselage bottom Does lean typical right power turn turbulator spar top bottom mains another aft bottom spar Golden Age polyhedral pop-up tail fuse de thermalizer Sal gonna park antique near crazy Free Flighters youll need gruff act havent made twisting climbers slow-motion glides since early SOs RC means no chasing early SOs RC planes usually crashed flew away made chas ing ridiculous Ive notions FF unlike Lefferts fun critter old Fire cracker MAN Pasture flights evening swarms barn swallows harassing its silent circles see now 035 electric motor five 500 mAh cells would need bit biggerjust rudder control retrieval shutoff maybe prevent seeding clouds Can get away Bob Kopski thing fascinates about Dave Peltzs not-too-modified Golderg J-3 Cub Electric power something might expect ingenious Sailplaner mastery computers knows geared Astro 40 cobalt 18 cells 12 Ah capacity turns its Rev-Up 13-8 prop precisely 7250 rpm horizontal flight 6250 ground Missouri Well son guy meas ures in-flight rpm via telemetry Condor Hobbies Tele-Tach consists tiny transmitter mounted plane tiny photocell pickup taped motor facing forward sees prop turning through bottom hole cowl Data rpm trans mitted handheld meter know this 1000 ground/air rpm dif Continued page 22 Y BI t x B2 -A-~1~ Y *1 B3 C Winters brain teaser month Figure standard expianation dihedral works B2 figure seems suggest anhedrai wouid unstable People like Evans have proved though case See text discussion August1986 37 Digital LCD tachometer has dual scale lox-i oox stable RPM readout Full scale voltmeter can used check/cycle TXIRX battery combos Reads load up 20 voltsand DC ammeter used check servo current Will find worn binding stalled servo conditions w/SCA1 Battery included 90 day warranty 4 Function ACCU-TACH $8995 ACCESSORIES OSAl -Quarter Scale Adapter ATi & AT2-500ma load.995 SCAl -Servo Current Adapter Airtronics Futaba Kraft 995 TLB1-Voltage Probes.295 CC1-Carrying Case will hold ACCU-TACH accessories. 1295 Send check MO NorCal Avionics A-B Tech Inc 5689 Glasgow Troy MI 48098 313 828-8210 MI add 4% tax Add $3 S&H See dealer first ATT- CHEKi ON-Board Battery Tester Saves Time. Saves Models BAiTCHEK RX-1 ein 5 usA Special Month 3/32x4x36 C Price good until Aug 1 1986 Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Protune corp 914 4626452 PO Box 1808 Poughkeepsie NY 12601 AMA CLUBS Ask about AMA Club Discounts minimum orders $10000 12020 Cent ralia Hawaiian Gardens CA 90716 213 865-3220 ference roughly one-sixth what wed tack ground takes guesswork out propunloading daily lotto game quite edge Dave accurately comparing props right now date finds Rev-Up better others tested farprobably due its thinner airfoil thinks As will see pictures J-3 nifty often stared bouncing gas indicator front windshield fullsize Cubso depressing short cross-country hops against wind cars would pass Using servo-actuated switch Daves J-3 gets 6 7 mm motor run has thermaled now Astro controller throt tle probably giving him 10- 1 1-mm run plus whatever glide time can get Climb realisticwhich what wish match type have sense scalelike flying 13-8 7000 has surprising brute pull hefty torque Peltz cautions everyone Electrics prop hitting dainty hand wont stop like glow engine therefore have arming switch Thats gospel Carl Goldberg Electric run wild adjoining room 3 am gets out bed no arming switch forgot turn off receiver weve done airborne pack faded dutifully turned on/off switch did hear guy Giant Scaie gassie started its Quadra way night didnt Pelts found electrified Cub required additional downthrust significantly right thrust gross 9 lb handled easily gear beefed up ensure accurate tracking ground handling tail wheel wire bent ard decrease ground-stance anglewhich also improves ground handling true tail-draggers Taking Tony Nacca ratos advice hes master big-scale Elec tics Dave twisted out both tips starting about two-thirds semispaninsurance happen slow up too much higher wing loadings Dave built J-3 because AMA Sound Committee As Sailplane man knows about silence does seem relate subject J-3 valid tool among others unpleasant war keep flying sites Dave gets asked about tiny stacks scalelike dummy engine big enough show easily runs turns switch find average Joe has never seen Electric Such guys dont believe thrust permitted hold J-3 Too heavy fly say Eating-crows getting scarce Daves summary noise prob lems facing future think Electric flying has grow popularity present weakness still batteries heavy energy limiting However expect well see some improvement area next few years will short time Electrics performance has doubled due better motors improved battery technology Incidentally Carl Goldberg Models expec ted add considerable Electric information kit plan because Pelts findings John Hartsflelds Schweizer tow plane speaks have published pictures series experimental RC low-wingers big its power pleasing perform ance K&B/Veco 19 spans 6 8 ft time got plan requests Hands-off soaring main objective three channels couldnt quite get combinationthough know now should have enough dihedral put tips line lower edge cockpit Continued page 130 38 Model Aviation NEW Balsa Spruce Plywood Mon Fri Kit Mfg match current prices 8am -4pm now paying better quality PST Open Public 40-60% Discounts BE PART OF AVIATIONS ANNUAL REUNION.. INVITATION TO YOU can help assure com memoration historic achievement continues opportunity par ticipate important ceremonies Societys other programs made available people young old As member will receive Societys quarterly newsletter FL YER will invited member tend participate December 17 ceremonies Memorial First Flight Luncheon unveiling honoree First Flight Shrine As member will have unique role helping assure pur poses Society met important work First Flight Shrine continues recognize honor have accomplished significant firsts aviation people might enjoy membership Society participation its programs informed opportunity PU RPOSES First Flight Society non profit memorial educational torical organization incorporated State North Carolina Its history traces 1926 Societys objectives organize conduct sponsor cosponsor promote otherwise cause appropriate ceremonies events held annually anniversary site elsewhere commemorating first powered flight Wright Brothers achievements contributions development flight encourage invite promote visits historic site people near far may see first hand birthplace powered flight foster promote public awareness widespread interest origin history future ffight its forms FIRST FLIGHT SOCIETY PO Box 1903 Kitty Hawk NC 27949 N AM P STREET CITY STATE __________ZIP Member $20 Business$l 50 National Corporation$5 00 Dues Contributions tax deductible Sorta Pitts/Shepherd Continued page 127 especially model gets air smoker really putting out roses first though took quite few flights get trimmed out model will little different keep mind arrangement shown starting point getting model adjusted fly way want have built flown monoplanes past remember different ball game wont handle same monoplane Have fun Plane Talk/Winter Continued page 38 like Rubber Scale jobs procrastinated doing redesign would have such dihedral nicely-tapered wing still tail-dragger almost spitting image Hartsfields ship romantic open cockpit Hartsfields plane answer anyone wants such aircraft However modest dihedral suggests fourchannel controls grand sport airplane plans MAN published Specs reported John span 6 ft area 600 sq weight 4 lb power OS 20F5 four-stroke prop Graupner l0-3i locals believe engine should pull okay will will beautiful John made dummy cylinder opposed twin look hard tell right-side cylinder working two-wheel gear simple sturdy scalelike cowl removes readily Location vertical tail allows simple one-piece elevator top deck suggests fulllength straight line fuselage dont know canopy stock modified home-brew unless want exact scale could almost anything canopy/open cockpit motif orange-and-white scheme accentuates long graceful wings ship proud Dont worry about climb power eight-footer climbed better six-footer flying wing will get high could possibly wish stab big enough keep bird step warm day supposes could maintain cruise fast idle wont airplane dummy pilot Chlnoolc warm moist southwest wind SP5 St 8I S Iie BENTOM BHOWN JH CAMIjilLL COMET- COVERITE DUBRO EAsv BUILT MODELS ENYA FAt FLYLINE Fox GOLDBERG- GOLDEN AGE REPRO IGENE DUBOIS- GUILLOW- K&B- K&S L R AX PACTRA- PECK-POLYMER PERFECT RN MODELS SEAGLEN SIG STERLING SULLIVAN SUPER TIGRE TAFFINDER TELCO- TOP FLITE WILLIAMS & OTHERS IESTES MODEL ROCKETS Send $100 Cash Check cc Stamps fop osac 44 page tabloid sise DISCOUNT Catalog 900 itlustraionsover 700 Kits choose MAILORDER PHONEORDER IN STORE ILLET 30137 CENTER am St LauudalmFa 19445 coast Oregon northward descends eastern faces Rocky Mountains Its appropriate name ultra-nice ultralight does explain peculiar lack awareness ultralights among us least two fine magazines filled full-color pictures reports projects just like other home-builders magical craft factory-produced kits flyaway planesthings like 50 mph lookalike Cub Citabria have images hang gliders grasshopper cuties open-air stuff wires struts over placeand immensely popularyouve missed boat Ive met first enclosed ultralight model flesh Im fascinated Kaluf blew red-and-white pusher lovely canopy big enough family goldfish Also Stoip Starlet buy locals word should law against anyone builds like spans 78 has 914 squares 40 two- four-strokes has OS four-stroke four channels Its Scale kit Canadian ultralight imported Germany means exquisite engineering requires patient assembly ingeniouslyfitted parts cut what seems like micrometer exactness Believe dont give tinkers damn about commercial plugs unvarnished reporting European plywood can different use whatever woods best suit purpose such limewood Plastics different strange-looking/smelling glues stick absolutely anything Enough photos deserve scrutiny Incidentally Bill Kaluf generally takes three months classic flying machines says complicatedlooking thing done six weeks half usual time wont take questions will forward letters Ships legend empathize fully peaks valleys starts off John Oldenkamp San Diego CA having growing up poor doing aeromodeling vacuum wait until 40th year witness True Flight ie Loss Airplane Through Thermal Activity acronym LOATTA have nothing against RC just have yet graduated finger control have Airtronics Monarch boards Project tonight John warms up tissuing 1937 Lanzo Combo Stick/Cabin jobfar too much time drawing up Zaic threeview bending hoops ribs teeny spars dog got up bench after housefly smushed whole tail Rebuilt recovered first red airplane Fourteen pieces paper wings beaut Two gigantic hand-carved freewheeling props 130 Model Aviation RON CHIDGEYS TIGER TAIL 4 ggg sq Sasic Kit 5118 Fihsqt.s Ps P. C vallatIs doss ml CABiN RIC PRODUCTS 112 IttaIs St Idaysts LA 71505 318 2327448 BYRON ORIGINALS E PCI lly. Practical Twin Ducted Fan Project Thousands satisfied modelers currently flying Byron Originals jets serve proof release kit can sure project can confidently build fly st dream designed built flown its designer few others new F-iS Eagle no exception F- 15 designed around proven Byro-Jet Propulsion System its twin Byro-Jet Fans turning nearly 20000 rpm producing 24 241/2 total pounds thrust Eagle delivers speed rate climb maneuver ability expect Byron Originals jet Unique Exclusive Components new F-i 5 far too numerous attempt describe magazine ad Detailed Info Pack includes brochure owners manual set reduced construction drawings kit pricing send $200 Get full story F-i 5 its long list exclusive features Custom Retractable Main Gear lutionary New Nose Gear Design matic Landing Gear Brake System Functional Pneumatic Speed Brake iled Fiberglass Fuselage Factory Installed Formers -in Wings Stabs Fins Precise Construction Methods Specifications wing Span 70channels 5 w/retracts Length 89 7 wls peed brake Ready-to-fly weight 28 lbs lending gear brakes Power - Twin Byro-Jet Performance Systems w/Rossi 81 orequiv Byron Originals Box 279lda Grove IA 51445 Ph 712 364-3165 also red Nice 2-in-dia wheels sanded out filled polished painted black Have set both up bench Since no admire mc share Pretty things Red always preferred yellow Until today Nearly ran out covering paper batch bought 15 years ago Now alcohol-shrink water Warps bad remember Forties nobody ever mentioned alterna tive beasts going get aerobap tism next Sunday over near Las Vegas OldTimer meet Oldenkamp goes VAMPS thing huge dry lake Reservations made Motorbike fueled up ready Have never Im certain will like rendition Lanzo huge vertical tall will blow minds isa pre-something ship defies modernity Looking prop specified judg ment great Chester Lanzo must have out mind quote 18 mill sol made up modest unit 16 high pitch will fly buggers like fly P-30s have sense will take photo graphs before sticking air maybe will rain blow will sit motel just plain talk am puzzled John says whet interest gravitate retrograde devices deep inside know squaretipped flat-bottomed mostly-sheet bird will run circles around what have just spent three weeks a-building eyes fingers hurt have shot up precious stash red tissue am fighting warps inch way Put nasty cut thumb carving props buck knife sucker will probably terminally tail heavy wind up will Mercury Seven Flight Phoenix Wright brothers over again Chester Lanzo hope nice guy four years old Lanzo launched prototype creations six Korda wowed guys back East did know Gas gasoline nor heard Maxwell Bassett interim aeromodeler hordes bridged too-young-to-know period now recognize Golden Age Modeling hoarded glue duringthe scarcity WW II days Balsa diverted military purposes flew paper airplanes out barn top did lot pretending fly airplanes whatever sort interest fueled world events As 12year-olds volunteered painfully scratch out identification models school thrilled whenever stray Selfridge Field P-47 passed over Oh elliptical planforms fat undercambered ribs hundreds hunks fuselage funky wheels bamboo bits Wonders Oldenkamp What wrong people design weird difficult gizmos Thank God now Hot Stuff good wood real razor blades T-pins Celotex building boards like None begins explain still build difficult old models John thinks case Half Korda all-sheet exercise Ed MA plan No 125 $1 75 led chase through Zaic yearbooks looking perfect most-beautiful model first disap pointment course instant discovery Old-Timers featured complex multi-curved outlines dumb fat proportions etc people nuts least current standards Cranks masochists build OldTimers right Ever made Korda Wakefield John asks What winners fly same straight up slight right spiral low dip glide off somewhere usually much need dether malizer Unnerving Spectacular cabin jobs accidents design insofar aerodynamics concerned probably masterpieces romance lore Zaic yearbooks usually listed longest flight achieved particular model fre quently somewhere between 12 42 minutes Powerful binoculars days strong legs maybe chased Model As got job done built flew crashed know did exist art form very much worth effort duplication discovery preservation things once done recreation miasma long since committed various libraries touching process creation however arcane immense delight am digging up past lam basically refaniiliarizing myself moments disappeared over hill far too quickly rush puberty manhood Long live Chet Lanzo Long live rubberband Red airplanes hope curse assumes some time passed before Oldenkamp added PS about flight experiences Rambled off 375 miles Henderson NV over weekend VAMPS Las Vegas Antique Model Airplane Society Annual Nice folks Vast site warm buoyant air hardpacked shiny dirt crust underfoot Magnifi cent mount scarps Stayed funky casino just three miles Hoover Dam sharing space noise Lake Mead drag boat crew WeirdContinued page 135 August 1986 131 F-l5EagI 1/7 Scale Exceptional Performance True Byro-Jet Style. iake-off distance paved runway less 250 feet little practice nose high landings predictable F-iS climbs authority good steady rate has solid positive groovy responsive feel Engine out performance outstanding ight trim changes enable hands-off straight level flight no need land until youre ready Plus Byron F-i 5 offers unlimited scale possibilities its priced com petitively other twin engine jets comparable size E E PERFORMANCE Step-By-Step Instructions lete Rolled Plans rate Machine Die Cut Balsa Spruce Plywood ce Spars Launch Strength TH HAND LAUNCH E HI-START H 59 Span 15 Oz 2 channel 370 Sq Area computer Modified E-193 Airfoil DAVEY Eh1SYSTEMS mwm CORPORATION ONE WOOD LANE MALVERN PA 19355 215 644-6772 Plane Talk/Winter Continued page 131 Lanzos fly Trembling nerves withstanding model got assembled photo graphed loaded modest amount rubber45 grams modem stuff Dry whole model weighed mere 100 grams 300 tenuous turns beast off its maiden voyage stally putted around sorta right kinda up came down near cars dented shiny red prop Darn shouldnt make trim change time appeared ship needed right down thrust plus some weight up front cure stall Added Y16 shim taped quarter nose second flight went up smoothiy same turnsgoing nowhere looking safe turns Risking packed 900 Fortunately lit DT fuse model shot off rapidly climbed throughout entire prop run hooked boomer soon become speck red looked great Itwas up about 7mm landed sight half-mile downwind retrieved foot san dals plopping along dry lake surface certainly thrilled gave toast C Lanzo now know built ancient heap understanding era investigate trace mind handiwork greats build some trust perhaps methods gain perspective probably little respect aeromodeling rootsnot within awareness until now Hope can find red tissue China connection Joe Tschirgi remember tailless Giant Stik May column paid dues retired English teacher Ninjing taken lightly book experts love argue such stuff offers correction make no arguments Just read Subject statement March 1986 issue MA concerning flying planks heavily reflexed airfoil makes stable Facts 1 Airfoil camberpositive reflex inverted zerohas nothing static stability 2 Youre certainly alone belief 9999% knowledgeable modelers surprising number full-scale aero en glneers would agree ie think reflex airfoils have stable center pressure travel Explanation 1 Static pitch stability aircraft rate change pitching moment angle attack 2 conventional air foilsthick thin cambered symmetric re flex inverted flathave constant aerody namic moments usable angle attack range 3 purpose reflex camber tailless configuration provide nose-up moment like angular difference tailed aircraft trims vehicle usable lift co efficient 4 NACA NASAs predecessor habit presenting airfoil Center Pressure defined moment divided lift led misunder standing stopped publishing meaning less confusing data conjunction airfoils over 50 years ago 5 center lift Aerodynamic center AC lift curve slope airfoil section parameters have significant influence static stability Both essentially fixed values AC 25% chord Ct/a0 1 per degree identical very few percent airfoils ie AC does move angle attack Repeat Does move Proof 1 Take old Free Flight wing junk pile Mount stick fuselage big fixed vertical fin aft wing 2 Mount big flat plate drag area about 2i chord lengths above wing Required area depends wing camber the 10% wing good starting point 3 Balance thing 15-18% MAC try hand glide Use usual trimming procedures remem ber drag area same thing angular difference the 4 Youll find thing glides stably inefficiently Obviously least drag area combined aft CG can get away will produce best glide Years ago eminent engineer presented lecture DCRC Club significant number odd configurations model glider form would work among glider suggested Tschirgi Van Hattum retired Holland used similar examples including Joes teaching July-August 1973 issue Junior Modeler Van Hattum published fasci nating article including nine radicals three-views picture achieved Joes result merely using tail vertical square stick projecting aft end fuselage Article title Gliders Nine Going sublime ridiculous heres teaser dihedral Theres diagram dard explanation dihedral works armY longerthan armX lift results Y side plane returned normal flight B 1 plane anhedral stable Yes Consider Evans Desperado quite stable full-scale examples So B2 arm Y shorter arm X Now correct can example B2 stable Shouldnt roll out control Continued page 136 .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74 3 Pak$495 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit5395 P0 Box68132 AIRCRAFT CO Portland OR 97268 Ready Fly$795 Add $3 postage handling first 2 packages 10 additional DGA Designs 0 D0A00 DC Designs 0 0 0 Cs0 0 j C o5 0 0 QuarterMaster 1SPORT BIPE S QUARTER SCALE PLANS Quarter Master Sport Bipe8 1f Guadra 35. 73Spafl.EZ build. Great Flyer.Semi-Ki AvaIlable..PPO 0 DAVIS D-1K sOaSpan. 0 Ouadra 35 power Similar. PPO CC 91933 KINNER SPORTSTER 5Modet K.117Span 035 power pPo5 5 _ oCs 4-CYCLE PROJECTS AKRON FUNK 15 Scale 54 Span deeCs 4 cycle. FantaStic FlyerPPoeI ________0 DAVIS D1K* 603 Spar. cycleorsirnilar..rP051D Two Inch wale Sieth scale _____________0 Cs 1933 KINNER SPORTSTER88 Cs Model K.75 Span. el-75.4cy PPO$ I110 Photo reduced try, Id Scale Plans oro Inch scale SIxth scale ________0 00A Plane0 cowing C PHOTO DOCUMENTATION PACKS available- 0 Scale Plans ALL PLANS ROLLEDSHIPPED UPS Conpleteelnstroctien Booklet Send sl00 Catalog O New York State Residents add 7% sales tao. Send check J o MO Os. Allow 3weoks tOr cflecktocleer Cs mU m] j [Ci st 1986 135 IfyoushouldthinkofslipflOtethatB3 what youd see wing RC pilot OK know better say matter relative wind acting upon dihedraled wings banked turn inside wing has greater angle attack outside stabilizes fun Does centrifugal force play part location CGthat high low pendulum effect What does presence centrifugal force banked turn know nothing Dont ask offer C old-fashioned turn-and-bank indicator instrnment tilted would leftbanked turn slip skid yaw equalized pilot coordination ball cen tered skid greater ball would move toward right side slip greater ball sinks toward left side plane itself can center ball what modelers call spirally stable piloting input required neutrally-stable moreacrobatic craft machine man together still center ball ball will center design has some deficiency difficult fly unflyable Whimsy flat-winged Stik close hands-off FF flat-winged Lacey Fike will fly OK Air three-dimensional often think terms two dimensionslike diagram Drop wing aileron pull upelevator model whips around know wing loadings go sky high high some times small heavy models youll snap out control plane pushing agalnst alr toward outside turn its angle attack affected holding upelevator wing perhaps nearer stall large part due centrifugal force free-to-pivot pendulum hung beneath belly would point wonders about Frank Zaics book Circu lar Airflow available AMA Supply & Service Section wondered about airflow phenomenawith turn-and-banked aircraftmany years ago Ive models would fly themselves around 360add bit nose weight becomes 720 vice-versa until cant hold 360 Such models seemingly can fine-tuned go neutrally stable banked circles yet flying hands-off neither recover ing nor degrading continuous-banked turns Argue leave out dont know nuttinunless name Tschirgi Planes wonderful things Perhaps ought wonder Bill Winter 4432 Altura Ct. Faitfax VA 22030 Radio Technique/Myers Continued page 41 redundant RF link Roland Spicer fascinating person talk pursued dream setting RC cross-country record great care intelligence describes event enthusiasm would credit much younger man can see Roland airplane description flight RC Video Magazine Volume 3 plane scale model Wallace Beerys Bellanca dedicated Rolands lifetime friend Allison Buck can seen hanglng ceiling AMA museum AMA Headquarters building Reston VA Ask Hurst Bowers tell about case havent noticed better times interference- reliability-wise rnshing down us George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Aid/Edberg Continued page 43 forklift required four RC channels launcher required two platform up/down launcher release decided use single transmitter con trol both gadgets same time wouldnt need juggle transmitters running experiment decided use trusty Futaba J Series system needed least six channels available Because two receivers would inside vacuum chamber made 1-in-thick solid steel walls felt using J Series quite reasonable transmitter shown behind forklift shots way radio signals get through receivers inside chamber through small Plexiglas window concerned two receivers same fre quency might interfere other both RC systems performed flawlessly through testing As far know first time model RC system has operated vacuum two receivers sub jected share electrical noise motors powered both forklift resetting mechanism launcher noise did affect operation receivers made big racket FM receiver used gather data telemetry system later found out several companies manufacture brushless DC motors supposed operate vacuum out generating electrical noise Next time Im using vacuum Ill give try Both forklift launcher pow ered sealed lead-acid D cells having 4 Ah capacity huge batteries known safe operate vacuum recharged after days testing constant-voltage charger case forklift extra weight lead-acid cells helped provide extra traction driving around foam rubber However often quite enough made snow tires pushing staples facing outward through tires cured traction problem launcher forklift arrangement worked extremely well After bit practice became proficient enough two oould have specimen back top launcher within 2 minutes may seem long time until consider specimen bounces ran domly foam-rubber-covered floor takes 90 seconds just recycle launcher case much less time 20 minutes needed recycle vacuum chamber wont go details results testing because really terest people field space craft dynamics will say results good enough Stanford award 136 Model Aviation Eke. Quality r S 937 x 156 x 175 18 oz 46 oz torque Years development have produced finest state-ofthe art receivers ever made Flight tests over country haveThe workhorse Ace servos Perfect Patternships Quarter Scale Boats Cars proven receiver will fly others fail Solid glitch-freeapplication high power required performance air plane attitude frequencies/channelsLIIIIIJ 14G20AAtlas Servo Kit$2395 Available Z7 50 53 72 75mHzAC 14G2OACAtlas Servo assembled$3146 12G70 Silver Seven Receiver Kit$3895 Available dealer order direct add $200 Ace RIC 116W 19th St Box SuB Higginsville MO 64037 816 584-721
Edition: Model Aviation - 1986/08
Page Numbers: 34, 35, 36, 37, 38, 130, 131, 135, 136
Bill Winter _____I3 EO 0 Plane Talk_______ OFF TO SEE THE WIZARD PA system blasted Light Horse Cavalry Overture Continentals 727 leaned its California leg out Denver hub West days Continental gimmick iron bird human terms Cross goal line leap hurdle lift bale Rotation music stopped Clapping hands cheers Seat belts prevented standing ovation Touch down Ontario came overture reach its wild climax magic carpet turned onto taxiway Encore Super ghostly 727 making music endlessly crisscrosses snowy peaks Jack Benny land Anaheim Azusa Cucamonga Watch step Cucamonga plane doesnt land Actually Rancho Cucamongaonly few miles Ontario Airport sitting patio February staring cardboard cutout mountalns 94 dry degrees shade enough whiten steers skull Incognito escape dead-stick mind Bill Evans found wizard wings 250 miles away Bishop fullsize sailpianers famed standing wave will loft 40000 ft beyond would budge although Dasher 40 crazy Des perado speeded-up modified Krackerjac tail Guys ribbed him much went fishing two weeks High Sierras Ill send friend Arrow pick up got foggy four days early morn beamed up patio announce will fly Gadzooks Fog now houses everywhere Guys thereeast south Los Angeles like strolling street players used work North Chicago family-style oases ends streets Three blocks away could fly Electric no fuss Ten minutes drive found nearly mile square flat field throughway far enough off safe Douglas plant distance paved highway fly off curbed lines car appearing distance about 20 min utes Small groups pairs trios kept arrivingmaking few flights departing join other similar groups Never saw club field hotshot pilotexcept Wizard Bill Evans Some dont see model magazines much else guess have ball hacker menagerie taught guy fly lickety split No knew either Evans Just two boys thought flying 60 Desperado mixed up version radar-timed police air show average roughiy 170 mph two runs upwind downwind long diving entries found critter has piped K&B 21 making similarly piped version K&Bs new plainbearing engine grudgingly agreeing bit span Trust keeps saying After view ing videotape 60 tape now AMA Museum AMA Executive Director John Worth muttered thing violates thing weve taught Dont think flying wing unstable stabilizer essential anhedral does workor technical articles diagram principle dihedral thing violated aerodynamic laws being immutable mind-set us have about everything familiar Seeing believing air ocean downwind turns and. some other time Youll remember 6-ft-plus Krackeijac itself modified early smaller threechannel ship 60s recent spoiler article Evans discussed 3141 airfoil evans Cranks up K&B piped 21 version Desperado prior Winters foray Star Wars found strange bird possess both neutrai go-where-you-point-it hands-off stabiiity no-taii detente know Evans kept Kracker jac after offering ship East whereas Winter has exact dupilcate Desperado lifting section two-thirds thickness above centerline provided l1 angular difference between wing/stab 20 dihedral skinned-foam wing tail OS 60 power Nice indeed got fly have Desperado mind has severe anhedral huge billboard vertical flying wings go like scat D unique stays pointed having flown found pussycat used high cruise also hands-off stable strange docile quick sport job bash around Sundays As easy fly conservative wingy cabin Krackeijac Desperado probably builds one-third time No orientation problems weirdly-configured wing until got too far out going away fog fringes suddenly looked like three-bladed prop Which two blades wings left two right two bottom two knew what next Since would sit handed transmitter Evans word Orientation 200 yards off no brave old pilots Space glorious space Psyched up back future Iknew Icould fly aerobatics Californiais Land Can Virginia Land Cant Back little flying site nice know am 20 years younger Aerobatics did high-jinks go 34 Modet Aviation After Bill Evans enticed Winter building Evans orange Krackerjac framed against genteel version Simitar flying wing snow-topped peaks Bishop ver old boy pound flesh Evans sion has balsa-skinned foam wing stab buiit new version Krackerjac a %l/ foil 1 1/2 decalage fiaperons stabilizer bitter pill swailowi Un- OS 60 Locals ribbed theflying-wing man expected fate brought two together badly go fishing two weeks some pisin fun flying under low thin fog mile square field just south LA Pleasure find Don Lefferts didnt have look very hard find Brown Teico CO-2-powered Mirage FF Plc shows blown-up version larger Herkimer CO-2 After WW ii engine mass production columns custodian sees good ies everywheresuch turbulator spars lines Fubars Ramrods San Diegans Left Whats different about Goldberg J-3 Cub its beautifuily built chocolate sprinkies thats ciuc Builder Dave Peitz isa member AMAs Sound Committe decided evaluate noiseless Scale model Hidden between cylinders its dummy twin Astro geared 40 whIch spins 13-8 Rev-Up 61/2 7 mm realistIc power flight Oh yes has soared Its all-up weight 91/i lb Right cowl removed removable ply box mount shows firewall extended forward Front plate 1/4-ln ply holed cooling Because motor has protruding brushes inserts rearhence bolt-on box Dave uses Teie-Tach measure rpm flight telemetry allowing precise prop comparisons Condor Hobbles device utilizes tiny transmit ter plane photocell pickup reads rpm through hole cowl Data transmitted hand-held meter ground Left inside story Three rows six 1 2V cells iSin Pack rests four1/s-in-sq pieces glued floor 3/4-in-sq across fuselage rear pack prevent sliding similartop crosspleces fitted under ply longerons hold-down Internal antenna attached strip runs aft strengthen gear accurate tracking wires attach ply fairings smail metal cable clamps Electric J-3 required downthrust considerable right Peltzs mods will added Goldberg plans Right asked what type four-stroke has Dave replies Wililams/Astro 40 aboutthe small exhaust pipes explains keep quiet heturns motor curious filp out Engine made fourWilliams Wright cylinder kits scrap balsa Tached 6250 rpm ground itturns 7250 air man named Gus mention Dr August Raspet discussion Al Backstrom MA April brought back flood memories Howell W Gwin Jr writes Beaumont TX went high school son David Starkville MS graduated Mississip pi State 1959 degree English remember Dr Raspet well about dozen us modelers Starkville profited Dr Raspets interest took same delight models did Richard Johnsons RJ-5 Although leading authorities boundary layer control always time talk airplanes us Id hate count number models constructed part scrap pile shop primarily interested Towline Gliders PAA Load inthose days Ihada Left Picture-perfect Schweizer John Hartafleld spans 6 ft weighs 4 lb has 600 sq area 20 OS four-stroke turns Graupner 1 031/a prop Locals wondered enough power pull John wonders will make stow plane ilke original Right Black pinstriping sets off modified plastic canopy emphasizes edges pretty orange-and-white color scheme Dummy cylinder gives authentic twin opposed look thats 0S side-mounted right Neatly painted pliot earphones scans realistic instruments August 1986 35 Left Winter lecturesthe Munchkln piioon iaiurs latest masterpiece 75-in Chinook Canadian uitraiightkita German import redand-white Scale museum piece model flies like trainer its 05 40 four-stroke pusher Right Removable canopy home helmeted pilot comes kit can look instrument pylon feet Metal tail boom struts some tough plastic plywood Left Covered painted trimmed reflections dancing polished surfaces Pilot seems have left hand tiller-type control slight pointed-down tilt thrust line Rudder pushrod external elevator rod appears hidden inside tall boom Right Precisely fitting ply pieces auto-align key mid-ship structure Including pylon takes two wing panels flush ala gliders Thermic 50X showing basics drag reduction helped get 301 glide ratio out designed propeller shroud Jasco Payloader Spitzy 045 vibrated too much lent us copies Frank Zaics yearbooks admitted freely learned great deal Zaic wasnt scholarly books about aerodynamics taught us about stability drag reduction Reynolds numbers knowing born teacher never lost enthusiasm sheer wonder flight dont think ever quite sure whether old solid wood Scientific Control Line models really airplanes always interested what did encouraged us build plastic models fly college swimming pool learn effect various control settings Gwin continues also streamlined clay get better glide performance almost drowned process Dr Raspet said could see airflow put potassium permanganate nose leading edges pool declared off-limits models very soon afterthatIwonder Dr Raspets Purple Plan loved soaring considering purest possible form flight used gliders research Some early activities involved chasing buzzards Sailplane movie camera Gus Raspets Buzzard Patrol well known Starkville still remember lovely calm morning flew over hangar about 300 feet up whistling theme High Mighty Thats decided Lhadto learn fly gliders heard father doubtful about safety airplane no engine took time talk him convince him gliding wasnt dangerous powered flight worked Dr Raspet Aeronautical Experiment Station time con sisted ramshackle Quonset hut blown wings mention often over 300 pinholes per square foot precise grid pattern got very tired pin vise dont remember Tailwind have very fond memories oper ating camera tuft-studies warsurplus flat-top Laister-Kauflnann gliders used research Dr Raspet founder Mississippi State Glider Club provided single-place Schweizer 1-19 glider learned fly glider being towed down runway just below flying speed bodyless 1938 Ford instructor inthe tow car signaled pilot way move stick rudder pedals until became automatic As became expert speed increased until left ground proficiencyand grad uated 100-ft rope 900 turns final step education 500-ft rope gave us enough altitude fly landing pattern point took ourflrst dual instruction Starkville EBO Mason Sumter Pappy Camp flight instructor Charles Lindbergh Dr Raspet lent club Olympia sailplane condition restore ourselves would often stop shop late night either help us just sit drink coffee tell stories Lord did have stories Most us agreed wed rather have Dr Raspet talk peel off old fabric rebuild ribs Ive rambled far too long about guess should stop Howell thinks bot tom line Dr Raspet finest human beings Ive ever met will always special because warmth interest other plane-struck people ages hate presumptuous think Dr Raspet would like being remembered just much tremendous contributions world aerodynamics telling Gwin used word last paragraph may have known him can remember Gus Raspet Fiddler roofTradition Tradition Don Lefferts tapped knee little rubber hammer leg jumped Its gray Mondays inspired go fly circlingbuzzards Lefferts vintage auto restoration otTheat escape models Im mood see going Ive charglng cycling listening sad stories told battery packs just got back Nats Don leads off flew own-design C02 called Image Its sort compilation Old-Timer FF designs stretched pulled shape use Brown Telco-size motors Ive loaned out plans several flying Wouldnt know friend built flies better ship photos large Imageblown up use old Herkimer OK COz motor Bill Browns tanks Au Yes created worlds 36 Model Aviation Left John Oldenkamp San Diego two Lanzo props 18-in version nose 16-in version foreground Smailer proved better performer two Right Stick cabin versions Lanzo combo Text has Oldenkamps OT thoughts famous engine Brown Jr shows great promise also took FF Old-Tinier called Tlush Mite Don goes trying trim Imanaged one-bounce landingintothe side perfectly-restored 1957 Chevrolet parked line 50 ordinary cars belonging ordinary mortals beautifully-finished car belongs Sal Taibi Sal gracious gruff made feel like little kid Fooey Ed Restored isnt quite correct word Sals old car Maintained would better Sal original owner has driven continu ously since car new Fooey no doubt way vintage car guy would feel about himself clobbering Sals classic massive C02 Sal always gracious seemingly gruff Don flown i-scale Laser car would have seen gruff Jd bet Mr Tradition Taibi inter ested rendition ye olde pylon FF An Ebling Phoenix-like fuselageflat bottom sweeping curved top Surfaces remi niscent Fubars Ranirods San Diegans ancient thick undercambered alr foil prior 1950 foiks like Pete Andrews John Zalc Frank Ehling went climb then-thin lO-percenters knife-sharp lead ing edges Stab tilted RCers No cockeyed up right glides right tricky skinny pylonextending down fuselage bottom Does lean typical right power turn turbulator spar top bottom mains another aft bottom spar Golden Age polyhedral pop-up tail fuse de thermalizer Sal gonna park antique near crazy Free Flighters youll need gruff act havent made twisting climbers slow-motion glides since early SOs RC means no chasing early SOs RC planes usually crashed flew away made chas ing ridiculous Ive notions FF unlike Lefferts fun critter old Fire cracker MAN Pasture flights evening swarms barn swallows harassing its silent circles see now 035 electric motor five 500 mAh cells would need bit biggerjust rudder control retrieval shutoff maybe prevent seeding clouds Can get away Bob Kopski thing fascinates about Dave Peltzs not-too-modified Golderg J-3 Cub Electric power something might expect ingenious Sailplaner mastery computers knows geared Astro 40 cobalt 18 cells 12 Ah capacity turns its Rev-Up 13-8 prop precisely 7250 rpm horizontal flight 6250 ground Missouri Well son guy meas ures in-flight rpm via telemetry Condor Hobbies Tele-Tach consists tiny transmitter mounted plane tiny photocell pickup taped motor facing forward sees prop turning through bottom hole cowl Data rpm trans mitted handheld meter know this 1000 ground/air rpm dif Continued page 22 Y BI t x B2 -A-~1~ Y *1 B3 C Winters brain teaser month Figure standard expianation dihedral works B2 figure seems suggest anhedrai wouid unstable People like Evans have proved though case See text discussion August1986 37 Digital LCD tachometer has dual scale lox-i oox stable RPM readout Full scale voltmeter can used check/cycle TXIRX battery combos Reads load up 20 voltsand DC ammeter used check servo current Will find worn binding stalled servo conditions w/SCA1 Battery included 90 day warranty 4 Function ACCU-TACH $8995 ACCESSORIES OSAl -Quarter Scale Adapter ATi & AT2-500ma load.995 SCAl -Servo Current Adapter Airtronics Futaba Kraft 995 TLB1-Voltage Probes.295 CC1-Carrying Case will hold ACCU-TACH accessories. 1295 Send check MO NorCal Avionics A-B Tech Inc 5689 Glasgow Troy MI 48098 313 828-8210 MI add 4% tax Add $3 S&H See dealer first ATT- CHEKi ON-Board Battery Tester Saves Time. Saves Models BAiTCHEK RX-1 ein 5 usA Special Month 3/32x4x36 C Price good until Aug 1 1986 Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Protune corp 914 4626452 PO Box 1808 Poughkeepsie NY 12601 AMA CLUBS Ask about AMA Club Discounts minimum orders $10000 12020 Cent ralia Hawaiian Gardens CA 90716 213 865-3220 ference roughly one-sixth what wed tack ground takes guesswork out propunloading daily lotto game quite edge Dave accurately comparing props right now date finds Rev-Up better others tested farprobably due its thinner airfoil thinks As will see pictures J-3 nifty often stared bouncing gas indicator front windshield fullsize Cubso depressing short cross-country hops against wind cars would pass Using servo-actuated switch Daves J-3 gets 6 7 mm motor run has thermaled now Astro controller throt tle probably giving him 10- 1 1-mm run plus whatever glide time can get Climb realisticwhich what wish match type have sense scalelike flying 13-8 7000 has surprising brute pull hefty torque Peltz cautions everyone Electrics prop hitting dainty hand wont stop like glow engine therefore have arming switch Thats gospel Carl Goldberg Electric run wild adjoining room 3 am gets out bed no arming switch forgot turn off receiver weve done airborne pack faded dutifully turned on/off switch did hear guy Giant Scaie gassie started its Quadra way night didnt Pelts found electrified Cub required additional downthrust significantly right thrust gross 9 lb handled easily gear beefed up ensure accurate tracking ground handling tail wheel wire bent ard decrease ground-stance anglewhich also improves ground handling true tail-draggers Taking Tony Nacca ratos advice hes master big-scale Elec tics Dave twisted out both tips starting about two-thirds semispaninsurance happen slow up too much higher wing loadings Dave built J-3 because AMA Sound Committee As Sailplane man knows about silence does seem relate subject J-3 valid tool among others unpleasant war keep flying sites Dave gets asked about tiny stacks scalelike dummy engine big enough show easily runs turns switch find average Joe has never seen Electric Such guys dont believe thrust permitted hold J-3 Too heavy fly say Eating-crows getting scarce Daves summary noise prob lems facing future think Electric flying has grow popularity present weakness still batteries heavy energy limiting However expect well see some improvement area next few years will short time Electrics performance has doubled due better motors improved battery technology Incidentally Carl Goldberg Models expec ted add considerable Electric information kit plan because Pelts findings John Hartsflelds Schweizer tow plane speaks have published pictures series experimental RC low-wingers big its power pleasing perform ance K&B/Veco 19 spans 6 8 ft time got plan requests Hands-off soaring main objective three channels couldnt quite get combinationthough know now should have enough dihedral put tips line lower edge cockpit Continued page 130 38 Model Aviation NEW Balsa Spruce Plywood Mon Fri Kit Mfg match current prices 8am -4pm now paying better quality PST Open Public 40-60% Discounts BE PART OF AVIATIONS ANNUAL REUNION.. INVITATION TO YOU can help assure com memoration historic achievement continues opportunity par ticipate important ceremonies Societys other programs made available people young old As member will receive Societys quarterly newsletter FL YER will invited member tend participate December 17 ceremonies Memorial First Flight Luncheon unveiling honoree First Flight Shrine As member will have unique role helping assure pur poses Society met important work First Flight Shrine continues recognize honor have accomplished significant firsts aviation people might enjoy membership Society participation its programs informed opportunity PU RPOSES First Flight Society non profit memorial educational torical organization incorporated State North Carolina Its history traces 1926 Societys objectives organize conduct sponsor cosponsor promote otherwise cause appropriate ceremonies events held annually anniversary site elsewhere commemorating first powered flight Wright Brothers achievements contributions development flight encourage invite promote visits historic site people near far may see first hand birthplace powered flight foster promote public awareness widespread interest origin history future ffight its forms FIRST FLIGHT SOCIETY PO Box 1903 Kitty Hawk NC 27949 N AM P STREET CITY STATE __________ZIP Member $20 Business$l 50 National Corporation$5 00 Dues Contributions tax deductible Sorta Pitts/Shepherd Continued page 127 especially model gets air smoker really putting out roses first though took quite few flights get trimmed out model will little different keep mind arrangement shown starting point getting model adjusted fly way want have built flown monoplanes past remember different ball game wont handle same monoplane Have fun Plane Talk/Winter Continued page 38 like Rubber Scale jobs procrastinated doing redesign would have such dihedral nicely-tapered wing still tail-dragger almost spitting image Hartsfields ship romantic open cockpit Hartsfields plane answer anyone wants such aircraft However modest dihedral suggests fourchannel controls grand sport airplane plans MAN published Specs reported John span 6 ft area 600 sq weight 4 lb power OS 20F5 four-stroke prop Graupner l0-3i locals believe engine should pull okay will will beautiful John made dummy cylinder opposed twin look hard tell right-side cylinder working two-wheel gear simple sturdy scalelike cowl removes readily Location vertical tail allows simple one-piece elevator top deck suggests fulllength straight line fuselage dont know canopy stock modified home-brew unless want exact scale could almost anything canopy/open cockpit motif orange-and-white scheme accentuates long graceful wings ship proud Dont worry about climb power eight-footer climbed better six-footer flying wing will get high could possibly wish stab big enough keep bird step warm day supposes could maintain cruise fast idle wont airplane dummy pilot Chlnoolc warm moist southwest wind SP5 St 8I S Iie BENTOM BHOWN JH CAMIjilLL COMET- COVERITE DUBRO EAsv BUILT MODELS ENYA FAt FLYLINE Fox GOLDBERG- GOLDEN AGE REPRO IGENE DUBOIS- GUILLOW- K&B- K&S L R AX PACTRA- PECK-POLYMER PERFECT RN MODELS SEAGLEN SIG STERLING SULLIVAN SUPER TIGRE TAFFINDER TELCO- TOP FLITE WILLIAMS & OTHERS IESTES MODEL ROCKETS Send $100 Cash Check cc Stamps fop osac 44 page tabloid sise DISCOUNT Catalog 900 itlustraionsover 700 Kits choose MAILORDER PHONEORDER IN STORE ILLET 30137 CENTER am St LauudalmFa 19445 coast Oregon northward descends eastern faces Rocky Mountains Its appropriate name ultra-nice ultralight does explain peculiar lack awareness ultralights among us least two fine magazines filled full-color pictures reports projects just like other home-builders magical craft factory-produced kits flyaway planesthings like 50 mph lookalike Cub Citabria have images hang gliders grasshopper cuties open-air stuff wires struts over placeand immensely popularyouve missed boat Ive met first enclosed ultralight model flesh Im fascinated Kaluf blew red-and-white pusher lovely canopy big enough family goldfish Also Stoip Starlet buy locals word should law against anyone builds like spans 78 has 914 squares 40 two- four-strokes has OS four-stroke four channels Its Scale kit Canadian ultralight imported Germany means exquisite engineering requires patient assembly ingeniouslyfitted parts cut what seems like micrometer exactness Believe dont give tinkers damn about commercial plugs unvarnished reporting European plywood can different use whatever woods best suit purpose such limewood Plastics different strange-looking/smelling glues stick absolutely anything Enough photos deserve scrutiny Incidentally Bill Kaluf generally takes three months classic flying machines says complicatedlooking thing done six weeks half usual time wont take questions will forward letters Ships legend empathize fully peaks valleys starts off John Oldenkamp San Diego CA having growing up poor doing aeromodeling vacuum wait until 40th year witness True Flight ie Loss Airplane Through Thermal Activity acronym LOATTA have nothing against RC just have yet graduated finger control have Airtronics Monarch boards Project tonight John warms up tissuing 1937 Lanzo Combo Stick/Cabin jobfar too much time drawing up Zaic threeview bending hoops ribs teeny spars dog got up bench after housefly smushed whole tail Rebuilt recovered first red airplane Fourteen pieces paper wings beaut Two gigantic hand-carved freewheeling props 130 Model Aviation RON CHIDGEYS TIGER TAIL 4 ggg sq Sasic Kit 5118 Fihsqt.s Ps P. C vallatIs doss ml CABiN RIC PRODUCTS 112 IttaIs St Idaysts LA 71505 318 2327448 BYRON ORIGINALS E PCI lly. Practical Twin Ducted Fan Project Thousands satisfied modelers currently flying Byron Originals jets serve proof release kit can sure project can confidently build fly st dream designed built flown its designer few others new F-iS Eagle no exception F- 15 designed around proven Byro-Jet Propulsion System its twin Byro-Jet Fans turning nearly 20000 rpm producing 24 241/2 total pounds thrust Eagle delivers speed rate climb maneuver ability expect Byron Originals jet Unique Exclusive Components new F-i 5 far too numerous attempt describe magazine ad Detailed Info Pack includes brochure owners manual set reduced construction drawings kit pricing send $200 Get full story F-i 5 its long list exclusive features Custom Retractable Main Gear lutionary New Nose Gear Design matic Landing Gear Brake System Functional Pneumatic Speed Brake iled Fiberglass Fuselage Factory Installed Formers -in Wings Stabs Fins Precise Construction Methods Specifications wing Span 70channels 5 w/retracts Length 89 7 wls peed brake Ready-to-fly weight 28 lbs lending gear brakes Power - Twin Byro-Jet Performance Systems w/Rossi 81 orequiv Byron Originals Box 279lda Grove IA 51445 Ph 712 364-3165 also red Nice 2-in-dia wheels sanded out filled polished painted black Have set both up bench Since no admire mc share Pretty things Red always preferred yellow Until today Nearly ran out covering paper batch bought 15 years ago Now alcohol-shrink water Warps bad remember Forties nobody ever mentioned alterna tive beasts going get aerobap tism next Sunday over near Las Vegas OldTimer meet Oldenkamp goes VAMPS thing huge dry lake Reservations made Motorbike fueled up ready Have never Im certain will like rendition Lanzo huge vertical tall will blow minds isa pre-something ship defies modernity Looking prop specified judg ment great Chester Lanzo must have out mind quote 18 mill sol made up modest unit 16 high pitch will fly buggers like fly P-30s have sense will take photo graphs before sticking air maybe will rain blow will sit motel just plain talk am puzzled John says whet interest gravitate retrograde devices deep inside know squaretipped flat-bottomed mostly-sheet bird will run circles around what have just spent three weeks a-building eyes fingers hurt have shot up precious stash red tissue am fighting warps inch way Put nasty cut thumb carving props buck knife sucker will probably terminally tail heavy wind up will Mercury Seven Flight Phoenix Wright brothers over again Chester Lanzo hope nice guy four years old Lanzo launched prototype creations six Korda wowed guys back East did know Gas gasoline nor heard Maxwell Bassett interim aeromodeler hordes bridged too-young-to-know period now recognize Golden Age Modeling hoarded glue duringthe scarcity WW II days Balsa diverted military purposes flew paper airplanes out barn top did lot pretending fly airplanes whatever sort interest fueled world events As 12year-olds volunteered painfully scratch out identification models school thrilled whenever stray Selfridge Field P-47 passed over Oh elliptical planforms fat undercambered ribs hundreds hunks fuselage funky wheels bamboo bits Wonders Oldenkamp What wrong people design weird difficult gizmos Thank God now Hot Stuff good wood real razor blades T-pins Celotex building boards like None begins explain still build difficult old models John thinks case Half Korda all-sheet exercise Ed MA plan No 125 $1 75 led chase through Zaic yearbooks looking perfect most-beautiful model first disap pointment course instant discovery Old-Timers featured complex multi-curved outlines dumb fat proportions etc people nuts least current standards Cranks masochists build OldTimers right Ever made Korda Wakefield John asks What winners fly same straight up slight right spiral low dip glide off somewhere usually much need dether malizer Unnerving Spectacular cabin jobs accidents design insofar aerodynamics concerned probably masterpieces romance lore Zaic yearbooks usually listed longest flight achieved particular model fre quently somewhere between 12 42 minutes Powerful binoculars days strong legs maybe chased Model As got job done built flew crashed know did exist art form very much worth effort duplication discovery preservation things once done recreation miasma long since committed various libraries touching process creation however arcane immense delight am digging up past lam basically refaniiliarizing myself moments disappeared over hill far too quickly rush puberty manhood Long live Chet Lanzo Long live rubberband Red airplanes hope curse assumes some time passed before Oldenkamp added PS about flight experiences Rambled off 375 miles Henderson NV over weekend VAMPS Las Vegas Antique Model Airplane Society Annual Nice folks Vast site warm buoyant air hardpacked shiny dirt crust underfoot Magnifi cent mount scarps Stayed funky casino just three miles Hoover Dam sharing space noise Lake Mead drag boat crew WeirdContinued page 135 August 1986 131 F-l5EagI 1/7 Scale Exceptional Performance True Byro-Jet Style. iake-off distance paved runway less 250 feet little practice nose high landings predictable F-iS climbs authority good steady rate has solid positive groovy responsive feel Engine out performance outstanding ight trim changes enable hands-off straight level flight no need land until youre ready Plus Byron F-i 5 offers unlimited scale possibilities its priced com petitively other twin engine jets comparable size E E PERFORMANCE Step-By-Step Instructions lete Rolled Plans rate Machine Die Cut Balsa Spruce Plywood ce Spars Launch Strength TH HAND LAUNCH E HI-START H 59 Span 15 Oz 2 channel 370 Sq Area computer Modified E-193 Airfoil DAVEY Eh1SYSTEMS mwm CORPORATION ONE WOOD LANE MALVERN PA 19355 215 644-6772 Plane Talk/Winter Continued page 131 Lanzos fly Trembling nerves withstanding model got assembled photo graphed loaded modest amount rubber45 grams modem stuff Dry whole model weighed mere 100 grams 300 tenuous turns beast off its maiden voyage stally putted around sorta right kinda up came down near cars dented shiny red prop Darn shouldnt make trim change time appeared ship needed right down thrust plus some weight up front cure stall Added Y16 shim taped quarter nose second flight went up smoothiy same turnsgoing nowhere looking safe turns Risking packed 900 Fortunately lit DT fuse model shot off rapidly climbed throughout entire prop run hooked boomer soon become speck red looked great Itwas up about 7mm landed sight half-mile downwind retrieved foot san dals plopping along dry lake surface certainly thrilled gave toast C Lanzo now know built ancient heap understanding era investigate trace mind handiwork greats build some trust perhaps methods gain perspective probably little respect aeromodeling rootsnot within awareness until now Hope can find red tissue China connection Joe Tschirgi remember tailless Giant Stik May column paid dues retired English teacher Ninjing taken lightly book experts love argue such stuff offers correction make no arguments Just read Subject statement March 1986 issue MA concerning flying planks heavily reflexed airfoil makes stable Facts 1 Airfoil camberpositive reflex inverted zerohas nothing static stability 2 Youre certainly alone belief 9999% knowledgeable modelers surprising number full-scale aero en glneers would agree ie think reflex airfoils have stable center pressure travel Explanation 1 Static pitch stability aircraft rate change pitching moment angle attack 2 conventional air foilsthick thin cambered symmetric re flex inverted flathave constant aerody namic moments usable angle attack range 3 purpose reflex camber tailless configuration provide nose-up moment like angular difference tailed aircraft trims vehicle usable lift co efficient 4 NACA NASAs predecessor habit presenting airfoil Center Pressure defined moment divided lift led misunder standing stopped publishing meaning less confusing data conjunction airfoils over 50 years ago 5 center lift Aerodynamic center AC lift curve slope airfoil section parameters have significant influence static stability Both essentially fixed values AC 25% chord Ct/a0 1 per degree identical very few percent airfoils ie AC does move angle attack Repeat Does move Proof 1 Take old Free Flight wing junk pile Mount stick fuselage big fixed vertical fin aft wing 2 Mount big flat plate drag area about 2i chord lengths above wing Required area depends wing camber the 10% wing good starting point 3 Balance thing 15-18% MAC try hand glide Use usual trimming procedures remem ber drag area same thing angular difference the 4 Youll find thing glides stably inefficiently Obviously least drag area combined aft CG can get away will produce best glide Years ago eminent engineer presented lecture DCRC Club significant number odd configurations model glider form would work among glider suggested Tschirgi Van Hattum retired Holland used similar examples including Joes teaching July-August 1973 issue Junior Modeler Van Hattum published fasci nating article including nine radicals three-views picture achieved Joes result merely using tail vertical square stick projecting aft end fuselage Article title Gliders Nine Going sublime ridiculous heres teaser dihedral Theres diagram dard explanation dihedral works armY longerthan armX lift results Y side plane returned normal flight B 1 plane anhedral stable Yes Consider Evans Desperado quite stable full-scale examples So B2 arm Y shorter arm X Now correct can example B2 stable Shouldnt roll out control Continued page 136 .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74 3 Pak$495 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit5395 P0 Box68132 AIRCRAFT CO Portland OR 97268 Ready Fly$795 Add $3 postage handling first 2 packages 10 additional DGA Designs 0 D0A00 DC Designs 0 0 0 Cs0 0 j C o5 0 0 QuarterMaster 1SPORT BIPE S QUARTER SCALE PLANS Quarter Master Sport Bipe8 1f Guadra 35. 73Spafl.EZ build. Great Flyer.Semi-Ki AvaIlable..PPO 0 DAVIS D-1K sOaSpan. 0 Ouadra 35 power Similar. PPO CC 91933 KINNER SPORTSTER 5Modet K.117Span 035 power pPo5 5 _ oCs 4-CYCLE PROJECTS AKRON FUNK 15 Scale 54 Span deeCs 4 cycle. FantaStic FlyerPPoeI ________0 DAVIS D1K* 603 Spar. cycleorsirnilar..rP051D Two Inch wale Sieth scale _____________0 Cs 1933 KINNER SPORTSTER88 Cs Model K.75 Span. el-75.4cy PPO$ I110 Photo reduced try, Id Scale Plans oro Inch scale SIxth scale ________0 00A Plane0 cowing C PHOTO DOCUMENTATION PACKS available- 0 Scale Plans ALL PLANS ROLLEDSHIPPED UPS Conpleteelnstroctien Booklet Send sl00 Catalog O New York State Residents add 7% sales tao. Send check J o MO Os. Allow 3weoks tOr cflecktocleer Cs mU m] j [Ci st 1986 135 IfyoushouldthinkofslipflOtethatB3 what youd see wing RC pilot OK know better say matter relative wind acting upon dihedraled wings banked turn inside wing has greater angle attack outside stabilizes fun Does centrifugal force play part location CGthat high low pendulum effect What does presence centrifugal force banked turn know nothing Dont ask offer C old-fashioned turn-and-bank indicator instrnment tilted would leftbanked turn slip skid yaw equalized pilot coordination ball cen tered skid greater ball would move toward right side slip greater ball sinks toward left side plane itself can center ball what modelers call spirally stable piloting input required neutrally-stable moreacrobatic craft machine man together still center ball ball will center design has some deficiency difficult fly unflyable Whimsy flat-winged Stik close hands-off FF flat-winged Lacey Fike will fly OK Air three-dimensional often think terms two dimensionslike diagram Drop wing aileron pull upelevator model whips around know wing loadings go sky high high some times small heavy models youll snap out control plane pushing agalnst alr toward outside turn its angle attack affected holding upelevator wing perhaps nearer stall large part due centrifugal force free-to-pivot pendulum hung beneath belly would point wonders about Frank Zaics book Circu lar Airflow available AMA Supply & Service Section wondered about airflow phenomenawith turn-and-banked aircraftmany years ago Ive models would fly themselves around 360add bit nose weight becomes 720 vice-versa until cant hold 360 Such models seemingly can fine-tuned go neutrally stable banked circles yet flying hands-off neither recover ing nor degrading continuous-banked turns Argue leave out dont know nuttinunless name Tschirgi Planes wonderful things Perhaps ought wonder Bill Winter 4432 Altura Ct. Faitfax VA 22030 Radio Technique/Myers Continued page 41 redundant RF link Roland Spicer fascinating person talk pursued dream setting RC cross-country record great care intelligence describes event enthusiasm would credit much younger man can see Roland airplane description flight RC Video Magazine Volume 3 plane scale model Wallace Beerys Bellanca dedicated Rolands lifetime friend Allison Buck can seen hanglng ceiling AMA museum AMA Headquarters building Reston VA Ask Hurst Bowers tell about case havent noticed better times interference- reliability-wise rnshing down us George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Aid/Edberg Continued page 43 forklift required four RC channels launcher required two platform up/down launcher release decided use single transmitter con trol both gadgets same time wouldnt need juggle transmitters running experiment decided use trusty Futaba J Series system needed least six channels available Because two receivers would inside vacuum chamber made 1-in-thick solid steel walls felt using J Series quite reasonable transmitter shown behind forklift shots way radio signals get through receivers inside chamber through small Plexiglas window concerned two receivers same fre quency might interfere other both RC systems performed flawlessly through testing As far know first time model RC system has operated vacuum two receivers sub jected share electrical noise motors powered both forklift resetting mechanism launcher noise did affect operation receivers made big racket FM receiver used gather data telemetry system later found out several companies manufacture brushless DC motors supposed operate vacuum out generating electrical noise Next time Im using vacuum Ill give try Both forklift launcher pow ered sealed lead-acid D cells having 4 Ah capacity huge batteries known safe operate vacuum recharged after days testing constant-voltage charger case forklift extra weight lead-acid cells helped provide extra traction driving around foam rubber However often quite enough made snow tires pushing staples facing outward through tires cured traction problem launcher forklift arrangement worked extremely well After bit practice became proficient enough two oould have specimen back top launcher within 2 minutes may seem long time until consider specimen bounces ran domly foam-rubber-covered floor takes 90 seconds just recycle launcher case much less time 20 minutes needed recycle vacuum chamber wont go details results testing because really terest people field space craft dynamics will say results good enough Stanford award 136 Model Aviation Eke. Quality r S 937 x 156 x 175 18 oz 46 oz torque Years development have produced finest state-ofthe art receivers ever made Flight tests over country haveThe workhorse Ace servos Perfect Patternships Quarter Scale Boats Cars proven receiver will fly others fail Solid glitch-freeapplication high power required performance air plane attitude frequencies/channelsLIIIIIJ 14G20AAtlas Servo Kit$2395 Available Z7 50 53 72 75mHzAC 14G2OACAtlas Servo assembled$3146 12G70 Silver Seven Receiver Kit$3895 Available dealer order direct add $200 Ace RIC 116W 19th St Box SuB Higginsville MO 64037 816 584-721
Edition: Model Aviation - 1986/08
Page Numbers: 34, 35, 36, 37, 38, 130, 131, 135, 136
Bill Winter _____I3 EO 0 Plane Talk_______ OFF TO SEE THE WIZARD PA system blasted Light Horse Cavalry Overture Continentals 727 leaned its California leg out Denver hub West days Continental gimmick iron bird human terms Cross goal line leap hurdle lift bale Rotation music stopped Clapping hands cheers Seat belts prevented standing ovation Touch down Ontario came overture reach its wild climax magic carpet turned onto taxiway Encore Super ghostly 727 making music endlessly crisscrosses snowy peaks Jack Benny land Anaheim Azusa Cucamonga Watch step Cucamonga plane doesnt land Actually Rancho Cucamongaonly few miles Ontario Airport sitting patio February staring cardboard cutout mountalns 94 dry degrees shade enough whiten steers skull Incognito escape dead-stick mind Bill Evans found wizard wings 250 miles away Bishop fullsize sailpianers famed standing wave will loft 40000 ft beyond would budge although Dasher 40 crazy Des perado speeded-up modified Krackerjac tail Guys ribbed him much went fishing two weeks High Sierras Ill send friend Arrow pick up got foggy four days early morn beamed up patio announce will fly Gadzooks Fog now houses everywhere Guys thereeast south Los Angeles like strolling street players used work North Chicago family-style oases ends streets Three blocks away could fly Electric no fuss Ten minutes drive found nearly mile square flat field throughway far enough off safe Douglas plant distance paved highway fly off curbed lines car appearing distance about 20 min utes Small groups pairs trios kept arrivingmaking few flights departing join other similar groups Never saw club field hotshot pilotexcept Wizard Bill Evans Some dont see model magazines much else guess have ball hacker menagerie taught guy fly lickety split No knew either Evans Just two boys thought flying 60 Desperado mixed up version radar-timed police air show average roughiy 170 mph two runs upwind downwind long diving entries found critter has piped K&B 21 making similarly piped version K&Bs new plainbearing engine grudgingly agreeing bit span Trust keeps saying After view ing videotape 60 tape now AMA Museum AMA Executive Director John Worth muttered thing violates thing weve taught Dont think flying wing unstable stabilizer essential anhedral does workor technical articles diagram principle dihedral thing violated aerodynamic laws being immutable mind-set us have about everything familiar Seeing believing air ocean downwind turns and. some other time Youll remember 6-ft-plus Krackeijac itself modified early smaller threechannel ship 60s recent spoiler article Evans discussed 3141 airfoil evans Cranks up K&B piped 21 version Desperado prior Winters foray Star Wars found strange bird possess both neutrai go-where-you-point-it hands-off stabiiity no-taii detente know Evans kept Kracker jac after offering ship East whereas Winter has exact dupilcate Desperado lifting section two-thirds thickness above centerline provided l1 angular difference between wing/stab 20 dihedral skinned-foam wing tail OS 60 power Nice indeed got fly have Desperado mind has severe anhedral huge billboard vertical flying wings go like scat D unique stays pointed having flown found pussycat used high cruise also hands-off stable strange docile quick sport job bash around Sundays As easy fly conservative wingy cabin Krackeijac Desperado probably builds one-third time No orientation problems weirdly-configured wing until got too far out going away fog fringes suddenly looked like three-bladed prop Which two blades wings left two right two bottom two knew what next Since would sit handed transmitter Evans word Orientation 200 yards off no brave old pilots Space glorious space Psyched up back future Iknew Icould fly aerobatics Californiais Land Can Virginia Land Cant Back little flying site nice know am 20 years younger Aerobatics did high-jinks go 34 Modet Aviation After Bill Evans enticed Winter building Evans orange Krackerjac framed against genteel version Simitar flying wing snow-topped peaks Bishop ver old boy pound flesh Evans sion has balsa-skinned foam wing stab buiit new version Krackerjac a %l/ foil 1 1/2 decalage fiaperons stabilizer bitter pill swailowi Un- OS 60 Locals ribbed theflying-wing man expected fate brought two together badly go fishing two weeks some pisin fun flying under low thin fog mile square field just south LA Pleasure find Don Lefferts didnt have look very hard find Brown Teico CO-2-powered Mirage FF Plc shows blown-up version larger Herkimer CO-2 After WW ii engine mass production columns custodian sees good ies everywheresuch turbulator spars lines Fubars Ramrods San Diegans Left Whats different about Goldberg J-3 Cub its beautifuily built chocolate sprinkies thats ciuc Builder Dave Peitz isa member AMAs Sound Committe decided evaluate noiseless Scale model Hidden between cylinders its dummy twin Astro geared 40 whIch spins 13-8 Rev-Up 61/2 7 mm realistIc power flight Oh yes has soared Its all-up weight 91/i lb Right cowl removed removable ply box mount shows firewall extended forward Front plate 1/4-ln ply holed cooling Because motor has protruding brushes inserts rearhence bolt-on box Dave uses Teie-Tach measure rpm flight telemetry allowing precise prop comparisons Condor Hobbles device utilizes tiny transmit ter plane photocell pickup reads rpm through hole cowl Data transmitted hand-held meter ground Left inside story Three rows six 1 2V cells iSin Pack rests four1/s-in-sq pieces glued floor 3/4-in-sq across fuselage rear pack prevent sliding similartop crosspleces fitted under ply longerons hold-down Internal antenna attached strip runs aft strengthen gear accurate tracking wires attach ply fairings smail metal cable clamps Electric J-3 required downthrust considerable right Peltzs mods will added Goldberg plans Right asked what type four-stroke has Dave replies Wililams/Astro 40 aboutthe small exhaust pipes explains keep quiet heturns motor curious filp out Engine made fourWilliams Wright cylinder kits scrap balsa Tached 6250 rpm ground itturns 7250 air man named Gus mention Dr August Raspet discussion Al Backstrom MA April brought back flood memories Howell W Gwin Jr writes Beaumont TX went high school son David Starkville MS graduated Mississip pi State 1959 degree English remember Dr Raspet well about dozen us modelers Starkville profited Dr Raspets interest took same delight models did Richard Johnsons RJ-5 Although leading authorities boundary layer control always time talk airplanes us Id hate count number models constructed part scrap pile shop primarily interested Towline Gliders PAA Load inthose days Ihada Left Picture-perfect Schweizer John Hartafleld spans 6 ft weighs 4 lb has 600 sq area 20 OS four-stroke turns Graupner 1 031/a prop Locals wondered enough power pull John wonders will make stow plane ilke original Right Black pinstriping sets off modified plastic canopy emphasizes edges pretty orange-and-white color scheme Dummy cylinder gives authentic twin opposed look thats 0S side-mounted right Neatly painted pliot earphones scans realistic instruments August 1986 35 Left Winter lecturesthe Munchkln piioon iaiurs latest masterpiece 75-in Chinook Canadian uitraiightkita German import redand-white Scale museum piece model flies like trainer its 05 40 four-stroke pusher Right Removable canopy home helmeted pilot comes kit can look instrument pylon feet Metal tail boom struts some tough plastic plywood Left Covered painted trimmed reflections dancing polished surfaces Pilot seems have left hand tiller-type control slight pointed-down tilt thrust line Rudder pushrod external elevator rod appears hidden inside tall boom Right Precisely fitting ply pieces auto-align key mid-ship structure Including pylon takes two wing panels flush ala gliders Thermic 50X showing basics drag reduction helped get 301 glide ratio out designed propeller shroud Jasco Payloader Spitzy 045 vibrated too much lent us copies Frank Zaics yearbooks admitted freely learned great deal Zaic wasnt scholarly books about aerodynamics taught us about stability drag reduction Reynolds numbers knowing born teacher never lost enthusiasm sheer wonder flight dont think ever quite sure whether old solid wood Scientific Control Line models really airplanes always interested what did encouraged us build plastic models fly college swimming pool learn effect various control settings Gwin continues also streamlined clay get better glide performance almost drowned process Dr Raspet said could see airflow put potassium permanganate nose leading edges pool declared off-limits models very soon afterthatIwonder Dr Raspets Purple Plan loved soaring considering purest possible form flight used gliders research Some early activities involved chasing buzzards Sailplane movie camera Gus Raspets Buzzard Patrol well known Starkville still remember lovely calm morning flew over hangar about 300 feet up whistling theme High Mighty Thats decided Lhadto learn fly gliders heard father doubtful about safety airplane no engine took time talk him convince him gliding wasnt dangerous powered flight worked Dr Raspet Aeronautical Experiment Station time con sisted ramshackle Quonset hut blown wings mention often over 300 pinholes per square foot precise grid pattern got very tired pin vise dont remember Tailwind have very fond memories oper ating camera tuft-studies warsurplus flat-top Laister-Kauflnann gliders used research Dr Raspet founder Mississippi State Glider Club provided single-place Schweizer 1-19 glider learned fly glider being towed down runway just below flying speed bodyless 1938 Ford instructor inthe tow car signaled pilot way move stick rudder pedals until became automatic As became expert speed increased until left ground proficiencyand grad uated 100-ft rope 900 turns final step education 500-ft rope gave us enough altitude fly landing pattern point took ourflrst dual instruction Starkville EBO Mason Sumter Pappy Camp flight instructor Charles Lindbergh Dr Raspet lent club Olympia sailplane condition restore ourselves would often stop shop late night either help us just sit drink coffee tell stories Lord did have stories Most us agreed wed rather have Dr Raspet talk peel off old fabric rebuild ribs Ive rambled far too long about guess should stop Howell thinks bot tom line Dr Raspet finest human beings Ive ever met will always special because warmth interest other plane-struck people ages hate presumptuous think Dr Raspet would like being remembered just much tremendous contributions world aerodynamics telling Gwin used word last paragraph may have known him can remember Gus Raspet Fiddler roofTradition Tradition Don Lefferts tapped knee little rubber hammer leg jumped Its gray Mondays inspired go fly circlingbuzzards Lefferts vintage auto restoration otTheat escape models Im mood see going Ive charglng cycling listening sad stories told battery packs just got back Nats Don leads off flew own-design C02 called Image Its sort compilation Old-Timer FF designs stretched pulled shape use Brown Telco-size motors Ive loaned out plans several flying Wouldnt know friend built flies better ship photos large Imageblown up use old Herkimer OK COz motor Bill Browns tanks Au Yes created worlds 36 Model Aviation Left John Oldenkamp San Diego two Lanzo props 18-in version nose 16-in version foreground Smailer proved better performer two Right Stick cabin versions Lanzo combo Text has Oldenkamps OT thoughts famous engine Brown Jr shows great promise also took FF Old-Tinier called Tlush Mite Don goes trying trim Imanaged one-bounce landingintothe side perfectly-restored 1957 Chevrolet parked line 50 ordinary cars belonging ordinary mortals beautifully-finished car belongs Sal Taibi Sal gracious gruff made feel like little kid Fooey Ed Restored isnt quite correct word Sals old car Maintained would better Sal original owner has driven continu ously since car new Fooey no doubt way vintage car guy would feel about himself clobbering Sals classic massive C02 Sal always gracious seemingly gruff Don flown i-scale Laser car would have seen gruff Jd bet Mr Tradition Taibi inter ested rendition ye olde pylon FF An Ebling Phoenix-like fuselageflat bottom sweeping curved top Surfaces remi niscent Fubars Ranirods San Diegans ancient thick undercambered alr foil prior 1950 foiks like Pete Andrews John Zalc Frank Ehling went climb then-thin lO-percenters knife-sharp lead ing edges Stab tilted RCers No cockeyed up right glides right tricky skinny pylonextending down fuselage bottom Does lean typical right power turn turbulator spar top bottom mains another aft bottom spar Golden Age polyhedral pop-up tail fuse de thermalizer Sal gonna park antique near crazy Free Flighters youll need gruff act havent made twisting climbers slow-motion glides since early SOs RC means no chasing early SOs RC planes usually crashed flew away made chas ing ridiculous Ive notions FF unlike Lefferts fun critter old Fire cracker MAN Pasture flights evening swarms barn swallows harassing its silent circles see now 035 electric motor five 500 mAh cells would need bit biggerjust rudder control retrieval shutoff maybe prevent seeding clouds Can get away Bob Kopski thing fascinates about Dave Peltzs not-too-modified Golderg J-3 Cub Electric power something might expect ingenious Sailplaner mastery computers knows geared Astro 40 cobalt 18 cells 12 Ah capacity turns its Rev-Up 13-8 prop precisely 7250 rpm horizontal flight 6250 ground Missouri Well son guy meas ures in-flight rpm via telemetry Condor Hobbies Tele-Tach consists tiny transmitter mounted plane tiny photocell pickup taped motor facing forward sees prop turning through bottom hole cowl Data rpm trans mitted handheld meter know this 1000 ground/air rpm dif Continued page 22 Y BI t x B2 -A-~1~ Y *1 B3 C Winters brain teaser month Figure standard expianation dihedral works B2 figure seems suggest anhedrai wouid unstable People like Evans have proved though case See text discussion August1986 37 Digital LCD tachometer has dual scale lox-i oox stable RPM readout Full scale voltmeter can used check/cycle TXIRX battery combos Reads load up 20 voltsand DC ammeter used check servo current Will find worn binding stalled servo conditions w/SCA1 Battery included 90 day warranty 4 Function ACCU-TACH $8995 ACCESSORIES OSAl -Quarter Scale Adapter ATi & AT2-500ma load.995 SCAl -Servo Current Adapter Airtronics Futaba Kraft 995 TLB1-Voltage Probes.295 CC1-Carrying Case will hold ACCU-TACH accessories. 1295 Send check MO NorCal Avionics A-B Tech Inc 5689 Glasgow Troy MI 48098 313 828-8210 MI add 4% tax Add $3 S&H See dealer first ATT- CHEKi ON-Board Battery Tester Saves Time. Saves Models BAiTCHEK RX-1 ein 5 usA Special Month 3/32x4x36 C Price good until Aug 1 1986 Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Protune corp 914 4626452 PO Box 1808 Poughkeepsie NY 12601 AMA CLUBS Ask about AMA Club Discounts minimum orders $10000 12020 Cent ralia Hawaiian Gardens CA 90716 213 865-3220 ference roughly one-sixth what wed tack ground takes guesswork out propunloading daily lotto game quite edge Dave accurately comparing props right now date finds Rev-Up better others tested farprobably due its thinner airfoil thinks As will see pictures J-3 nifty often stared bouncing gas indicator front windshield fullsize Cubso depressing short cross-country hops against wind cars would pass Using servo-actuated switch Daves J-3 gets 6 7 mm motor run has thermaled now Astro controller throt tle probably giving him 10- 1 1-mm run plus whatever glide time can get Climb realisticwhich what wish match type have sense scalelike flying 13-8 7000 has surprising brute pull hefty torque Peltz cautions everyone Electrics prop hitting dainty hand wont stop like glow engine therefore have arming switch Thats gospel Carl Goldberg Electric run wild adjoining room 3 am gets out bed no arming switch forgot turn off receiver weve done airborne pack faded dutifully turned on/off switch did hear guy Giant Scaie gassie started its Quadra way night didnt Pelts found electrified Cub required additional downthrust significantly right thrust gross 9 lb handled easily gear beefed up ensure accurate tracking ground handling tail wheel wire bent ard decrease ground-stance anglewhich also improves ground handling true tail-draggers Taking Tony Nacca ratos advice hes master big-scale Elec tics Dave twisted out both tips starting about two-thirds semispaninsurance happen slow up too much higher wing loadings Dave built J-3 because AMA Sound Committee As Sailplane man knows about silence does seem relate subject J-3 valid tool among others unpleasant war keep flying sites Dave gets asked about tiny stacks scalelike dummy engine big enough show easily runs turns switch find average Joe has never seen Electric Such guys dont believe thrust permitted hold J-3 Too heavy fly say Eating-crows getting scarce Daves summary noise prob lems facing future think Electric flying has grow popularity present weakness still batteries heavy energy limiting However expect well see some improvement area next few years will short time Electrics performance has doubled due better motors improved battery technology Incidentally Carl Goldberg Models expec ted add considerable Electric information kit plan because Pelts findings John Hartsflelds Schweizer tow plane speaks have published pictures series experimental RC low-wingers big its power pleasing perform ance K&B/Veco 19 spans 6 8 ft time got plan requests Hands-off soaring main objective three channels couldnt quite get combinationthough know now should have enough dihedral put tips line lower edge cockpit Continued page 130 38 Model Aviation NEW Balsa Spruce Plywood Mon Fri Kit Mfg match current prices 8am -4pm now paying better quality PST Open Public 40-60% Discounts BE PART OF AVIATIONS ANNUAL REUNION.. INVITATION TO YOU can help assure com memoration historic achievement continues opportunity par ticipate important ceremonies Societys other programs made available people young old As member will receive Societys quarterly newsletter FL YER will invited member tend participate December 17 ceremonies Memorial First Flight Luncheon unveiling honoree First Flight Shrine As member will have unique role helping assure pur poses Society met important work First Flight Shrine continues recognize honor have accomplished significant firsts aviation people might enjoy membership Society participation its programs informed opportunity PU RPOSES First Flight Society non profit memorial educational torical organization incorporated State North Carolina Its history traces 1926 Societys objectives organize conduct sponsor cosponsor promote otherwise cause appropriate ceremonies events held annually anniversary site elsewhere commemorating first powered flight Wright Brothers achievements contributions development flight encourage invite promote visits historic site people near far may see first hand birthplace powered flight foster promote public awareness widespread interest origin history future ffight its forms FIRST FLIGHT SOCIETY PO Box 1903 Kitty Hawk NC 27949 N AM P STREET CITY STATE __________ZIP Member $20 Business$l 50 National Corporation$5 00 Dues Contributions tax deductible Sorta Pitts/Shepherd Continued page 127 especially model gets air smoker really putting out roses first though took quite few flights get trimmed out model will little different keep mind arrangement shown starting point getting model adjusted fly way want have built flown monoplanes past remember different ball game wont handle same monoplane Have fun Plane Talk/Winter Continued page 38 like Rubber Scale jobs procrastinated doing redesign would have such dihedral nicely-tapered wing still tail-dragger almost spitting image Hartsfields ship romantic open cockpit Hartsfields plane answer anyone wants such aircraft However modest dihedral suggests fourchannel controls grand sport airplane plans MAN published Specs reported John span 6 ft area 600 sq weight 4 lb power OS 20F5 four-stroke prop Graupner l0-3i locals believe engine should pull okay will will beautiful John made dummy cylinder opposed twin look hard tell right-side cylinder working two-wheel gear simple sturdy scalelike cowl removes readily Location vertical tail allows simple one-piece elevator top deck suggests fulllength straight line fuselage dont know canopy stock modified home-brew unless want exact scale could almost anything canopy/open cockpit motif orange-and-white scheme accentuates long graceful wings ship proud Dont worry about climb power eight-footer climbed better six-footer flying wing will get high could possibly wish stab big enough keep bird step warm day supposes could maintain cruise fast idle wont airplane dummy pilot Chlnoolc warm moist southwest wind SP5 St 8I S Iie BENTOM BHOWN JH CAMIjilLL COMET- COVERITE DUBRO EAsv BUILT MODELS ENYA FAt FLYLINE Fox GOLDBERG- GOLDEN AGE REPRO IGENE DUBOIS- GUILLOW- K&B- K&S L R AX PACTRA- PECK-POLYMER PERFECT RN MODELS SEAGLEN SIG STERLING SULLIVAN SUPER TIGRE TAFFINDER TELCO- TOP FLITE WILLIAMS & OTHERS IESTES MODEL ROCKETS Send $100 Cash Check cc Stamps fop osac 44 page tabloid sise DISCOUNT Catalog 900 itlustraionsover 700 Kits choose MAILORDER PHONEORDER IN STORE ILLET 30137 CENTER am St LauudalmFa 19445 coast Oregon northward descends eastern faces Rocky Mountains Its appropriate name ultra-nice ultralight does explain peculiar lack awareness ultralights among us least two fine magazines filled full-color pictures reports projects just like other home-builders magical craft factory-produced kits flyaway planesthings like 50 mph lookalike Cub Citabria have images hang gliders grasshopper cuties open-air stuff wires struts over placeand immensely popularyouve missed boat Ive met first enclosed ultralight model flesh Im fascinated Kaluf blew red-and-white pusher lovely canopy big enough family goldfish Also Stoip Starlet buy locals word should law against anyone builds like spans 78 has 914 squares 40 two- four-strokes has OS four-stroke four channels Its Scale kit Canadian ultralight imported Germany means exquisite engineering requires patient assembly ingeniouslyfitted parts cut what seems like micrometer exactness Believe dont give tinkers damn about commercial plugs unvarnished reporting European plywood can different use whatever woods best suit purpose such limewood Plastics different strange-looking/smelling glues stick absolutely anything Enough photos deserve scrutiny Incidentally Bill Kaluf generally takes three months classic flying machines says complicatedlooking thing done six weeks half usual time wont take questions will forward letters Ships legend empathize fully peaks valleys starts off John Oldenkamp San Diego CA having growing up poor doing aeromodeling vacuum wait until 40th year witness True Flight ie Loss Airplane Through Thermal Activity acronym LOATTA have nothing against RC just have yet graduated finger control have Airtronics Monarch boards Project tonight John warms up tissuing 1937 Lanzo Combo Stick/Cabin jobfar too much time drawing up Zaic threeview bending hoops ribs teeny spars dog got up bench after housefly smushed whole tail Rebuilt recovered first red airplane Fourteen pieces paper wings beaut Two gigantic hand-carved freewheeling props 130 Model Aviation RON CHIDGEYS TIGER TAIL 4 ggg sq Sasic Kit 5118 Fihsqt.s Ps P. C vallatIs doss ml CABiN RIC PRODUCTS 112 IttaIs St Idaysts LA 71505 318 2327448 BYRON ORIGINALS E PCI lly. Practical Twin Ducted Fan Project Thousands satisfied modelers currently flying Byron Originals jets serve proof release kit can sure project can confidently build fly st dream designed built flown its designer few others new F-iS Eagle no exception F- 15 designed around proven Byro-Jet Propulsion System its twin Byro-Jet Fans turning nearly 20000 rpm producing 24 241/2 total pounds thrust Eagle delivers speed rate climb maneuver ability expect Byron Originals jet Unique Exclusive Components new F-i 5 far too numerous attempt describe magazine ad Detailed Info Pack includes brochure owners manual set reduced construction drawings kit pricing send $200 Get full story F-i 5 its long list exclusive features Custom Retractable Main Gear lutionary New Nose Gear Design matic Landing Gear Brake System Functional Pneumatic Speed Brake iled Fiberglass Fuselage Factory Installed Formers -in Wings Stabs Fins Precise Construction Methods Specifications wing Span 70channels 5 w/retracts Length 89 7 wls peed brake Ready-to-fly weight 28 lbs lending gear brakes Power - Twin Byro-Jet Performance Systems w/Rossi 81 orequiv Byron Originals Box 279lda Grove IA 51445 Ph 712 364-3165 also red Nice 2-in-dia wheels sanded out filled polished painted black Have set both up bench Since no admire mc share Pretty things Red always preferred yellow Until today Nearly ran out covering paper batch bought 15 years ago Now alcohol-shrink water Warps bad remember Forties nobody ever mentioned alterna tive beasts going get aerobap tism next Sunday over near Las Vegas OldTimer meet Oldenkamp goes VAMPS thing huge dry lake Reservations made Motorbike fueled up ready Have never Im certain will like rendition Lanzo huge vertical tall will blow minds isa pre-something ship defies modernity Looking prop specified judg ment great Chester Lanzo must have out mind quote 18 mill sol made up modest unit 16 high pitch will fly buggers like fly P-30s have sense will take photo graphs before sticking air maybe will rain blow will sit motel just plain talk am puzzled John says whet interest gravitate retrograde devices deep inside know squaretipped flat-bottomed mostly-sheet bird will run circles around what have just spent three weeks a-building eyes fingers hurt have shot up precious stash red tissue am fighting warps inch way Put nasty cut thumb carving props buck knife sucker will probably terminally tail heavy wind up will Mercury Seven Flight Phoenix Wright brothers over again Chester Lanzo hope nice guy four years old Lanzo launched prototype creations six Korda wowed guys back East did know Gas gasoline nor heard Maxwell Bassett interim aeromodeler hordes bridged too-young-to-know period now recognize Golden Age Modeling hoarded glue duringthe scarcity WW II days Balsa diverted military purposes flew paper airplanes out barn top did lot pretending fly airplanes whatever sort interest fueled world events As 12year-olds volunteered painfully scratch out identification models school thrilled whenever stray Selfridge Field P-47 passed over Oh elliptical planforms fat undercambered ribs hundreds hunks fuselage funky wheels bamboo bits Wonders Oldenkamp What wrong people design weird difficult gizmos Thank God now Hot Stuff good wood real razor blades T-pins Celotex building boards like None begins explain still build difficult old models John thinks case Half Korda all-sheet exercise Ed MA plan No 125 $1 75 led chase through Zaic yearbooks looking perfect most-beautiful model first disap pointment course instant discovery Old-Timers featured complex multi-curved outlines dumb fat proportions etc people nuts least current standards Cranks masochists build OldTimers right Ever made Korda Wakefield John asks What winners fly same straight up slight right spiral low dip glide off somewhere usually much need dether malizer Unnerving Spectacular cabin jobs accidents design insofar aerodynamics concerned probably masterpieces romance lore Zaic yearbooks usually listed longest flight achieved particular model fre quently somewhere between 12 42 minutes Powerful binoculars days strong legs maybe chased Model As got job done built flew crashed know did exist art form very much worth effort duplication discovery preservation things once done recreation miasma long since committed various libraries touching process creation however arcane immense delight am digging up past lam basically refaniiliarizing myself moments disappeared over hill far too quickly rush puberty manhood Long live Chet Lanzo Long live rubberband Red airplanes hope curse assumes some time passed before Oldenkamp added PS about flight experiences Rambled off 375 miles Henderson NV over weekend VAMPS Las Vegas Antique Model Airplane Society Annual Nice folks Vast site warm buoyant air hardpacked shiny dirt crust underfoot Magnifi cent mount scarps Stayed funky casino just three miles Hoover Dam sharing space noise Lake Mead drag boat crew WeirdContinued page 135 August 1986 131 F-l5EagI 1/7 Scale Exceptional Performance True Byro-Jet Style. iake-off distance paved runway less 250 feet little practice nose high landings predictable F-iS climbs authority good steady rate has solid positive groovy responsive feel Engine out performance outstanding ight trim changes enable hands-off straight level flight no need land until youre ready Plus Byron F-i 5 offers unlimited scale possibilities its priced com petitively other twin engine jets comparable size E E PERFORMANCE Step-By-Step Instructions lete Rolled Plans rate Machine Die Cut Balsa Spruce Plywood ce Spars Launch Strength TH HAND LAUNCH E HI-START H 59 Span 15 Oz 2 channel 370 Sq Area computer Modified E-193 Airfoil DAVEY Eh1SYSTEMS mwm CORPORATION ONE WOOD LANE MALVERN PA 19355 215 644-6772 Plane Talk/Winter Continued page 131 Lanzos fly Trembling nerves withstanding model got assembled photo graphed loaded modest amount rubber45 grams modem stuff Dry whole model weighed mere 100 grams 300 tenuous turns beast off its maiden voyage stally putted around sorta right kinda up came down near cars dented shiny red prop Darn shouldnt make trim change time appeared ship needed right down thrust plus some weight up front cure stall Added Y16 shim taped quarter nose second flight went up smoothiy same turnsgoing nowhere looking safe turns Risking packed 900 Fortunately lit DT fuse model shot off rapidly climbed throughout entire prop run hooked boomer soon become speck red looked great Itwas up about 7mm landed sight half-mile downwind retrieved foot san dals plopping along dry lake surface certainly thrilled gave toast C Lanzo now know built ancient heap understanding era investigate trace mind handiwork greats build some trust perhaps methods gain perspective probably little respect aeromodeling rootsnot within awareness until now Hope can find red tissue China connection Joe Tschirgi remember tailless Giant Stik May column paid dues retired English teacher Ninjing taken lightly book experts love argue such stuff offers correction make no arguments Just read Subject statement March 1986 issue MA concerning flying planks heavily reflexed airfoil makes stable Facts 1 Airfoil camberpositive reflex inverted zerohas nothing static stability 2 Youre certainly alone belief 9999% knowledgeable modelers surprising number full-scale aero en glneers would agree ie think reflex airfoils have stable center pressure travel Explanation 1 Static pitch stability aircraft rate change pitching moment angle attack 2 conventional air foilsthick thin cambered symmetric re flex inverted flathave constant aerody namic moments usable angle attack range 3 purpose reflex camber tailless configuration provide nose-up moment like angular difference tailed aircraft trims vehicle usable lift co efficient 4 NACA NASAs predecessor habit presenting airfoil Center Pressure defined moment divided lift led misunder standing stopped publishing meaning less confusing data conjunction airfoils over 50 years ago 5 center lift Aerodynamic center AC lift curve slope airfoil section parameters have significant influence static stability Both essentially fixed values AC 25% chord Ct/a0 1 per degree identical very few percent airfoils ie AC does move angle attack Repeat Does move Proof 1 Take old Free Flight wing junk pile Mount stick fuselage big fixed vertical fin aft wing 2 Mount big flat plate drag area about 2i chord lengths above wing Required area depends wing camber the 10% wing good starting point 3 Balance thing 15-18% MAC try hand glide Use usual trimming procedures remem ber drag area same thing angular difference the 4 Youll find thing glides stably inefficiently Obviously least drag area combined aft CG can get away will produce best glide Years ago eminent engineer presented lecture DCRC Club significant number odd configurations model glider form would work among glider suggested Tschirgi Van Hattum retired Holland used similar examples including Joes teaching July-August 1973 issue Junior Modeler Van Hattum published fasci nating article including nine radicals three-views picture achieved Joes result merely using tail vertical square stick projecting aft end fuselage Article title Gliders Nine Going sublime ridiculous heres teaser dihedral Theres diagram dard explanation dihedral works armY longerthan armX lift results Y side plane returned normal flight B 1 plane anhedral stable Yes Consider Evans Desperado quite stable full-scale examples So B2 arm Y shorter arm X Now correct can example B2 stable Shouldnt roll out control Continued page 136 .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74 3 Pak$495 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit5395 P0 Box68132 AIRCRAFT CO Portland OR 97268 Ready Fly$795 Add $3 postage handling first 2 packages 10 additional DGA Designs 0 D0A00 DC Designs 0 0 0 Cs0 0 j C o5 0 0 QuarterMaster 1SPORT BIPE S QUARTER SCALE PLANS Quarter Master Sport Bipe8 1f Guadra 35. 73Spafl.EZ build. Great Flyer.Semi-Ki AvaIlable..PPO 0 DAVIS D-1K sOaSpan. 0 Ouadra 35 power Similar. PPO CC 91933 KINNER SPORTSTER 5Modet K.117Span 035 power pPo5 5 _ oCs 4-CYCLE PROJECTS AKRON FUNK 15 Scale 54 Span deeCs 4 cycle. FantaStic FlyerPPoeI ________0 DAVIS D1K* 603 Spar. cycleorsirnilar..rP051D Two Inch wale Sieth scale _____________0 Cs 1933 KINNER SPORTSTER88 Cs Model K.75 Span. el-75.4cy PPO$ I110 Photo reduced try, Id Scale Plans oro Inch scale SIxth scale ________0 00A Plane0 cowing C PHOTO DOCUMENTATION PACKS available- 0 Scale Plans ALL PLANS ROLLEDSHIPPED UPS Conpleteelnstroctien Booklet Send sl00 Catalog O New York State Residents add 7% sales tao. Send check J o MO Os. Allow 3weoks tOr cflecktocleer Cs mU m] j [Ci st 1986 135 IfyoushouldthinkofslipflOtethatB3 what youd see wing RC pilot OK know better say matter relative wind acting upon dihedraled wings banked turn inside wing has greater angle attack outside stabilizes fun Does centrifugal force play part location CGthat high low pendulum effect What does presence centrifugal force banked turn know nothing Dont ask offer C old-fashioned turn-and-bank indicator instrnment tilted would leftbanked turn slip skid yaw equalized pilot coordination ball cen tered skid greater ball would move toward right side slip greater ball sinks toward left side plane itself can center ball what modelers call spirally stable piloting input required neutrally-stable moreacrobatic craft machine man together still center ball ball will center design has some deficiency difficult fly unflyable Whimsy flat-winged Stik close hands-off FF flat-winged Lacey Fike will fly OK Air three-dimensional often think terms two dimensionslike diagram Drop wing aileron pull upelevator model whips around know wing loadings go sky high high some times small heavy models youll snap out control plane pushing agalnst alr toward outside turn its angle attack affected holding upelevator wing perhaps nearer stall large part due centrifugal force free-to-pivot pendulum hung beneath belly would point wonders about Frank Zaics book Circu lar Airflow available AMA Supply & Service Section wondered about airflow phenomenawith turn-and-banked aircraftmany years ago Ive models would fly themselves around 360add bit nose weight becomes 720 vice-versa until cant hold 360 Such models seemingly can fine-tuned go neutrally stable banked circles yet flying hands-off neither recover ing nor degrading continuous-banked turns Argue leave out dont know nuttinunless name Tschirgi Planes wonderful things Perhaps ought wonder Bill Winter 4432 Altura Ct. Faitfax VA 22030 Radio Technique/Myers Continued page 41 redundant RF link Roland Spicer fascinating person talk pursued dream setting RC cross-country record great care intelligence describes event enthusiasm would credit much younger man can see Roland airplane description flight RC Video Magazine Volume 3 plane scale model Wallace Beerys Bellanca dedicated Rolands lifetime friend Allison Buck can seen hanglng ceiling AMA museum AMA Headquarters building Reston VA Ask Hurst Bowers tell about case havent noticed better times interference- reliability-wise rnshing down us George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Aid/Edberg Continued page 43 forklift required four RC channels launcher required two platform up/down launcher release decided use single transmitter con trol both gadgets same time wouldnt need juggle transmitters running experiment decided use trusty Futaba J Series system needed least six channels available Because two receivers would inside vacuum chamber made 1-in-thick solid steel walls felt using J Series quite reasonable transmitter shown behind forklift shots way radio signals get through receivers inside chamber through small Plexiglas window concerned two receivers same fre quency might interfere other both RC systems performed flawlessly through testing As far know first time model RC system has operated vacuum two receivers sub jected share electrical noise motors powered both forklift resetting mechanism launcher noise did affect operation receivers made big racket FM receiver used gather data telemetry system later found out several companies manufacture brushless DC motors supposed operate vacuum out generating electrical noise Next time Im using vacuum Ill give try Both forklift launcher pow ered sealed lead-acid D cells having 4 Ah capacity huge batteries known safe operate vacuum recharged after days testing constant-voltage charger case forklift extra weight lead-acid cells helped provide extra traction driving around foam rubber However often quite enough made snow tires pushing staples facing outward through tires cured traction problem launcher forklift arrangement worked extremely well After bit practice became proficient enough two oould have specimen back top launcher within 2 minutes may seem long time until consider specimen bounces ran domly foam-rubber-covered floor takes 90 seconds just recycle launcher case much less time 20 minutes needed recycle vacuum chamber wont go details results testing because really terest people field space craft dynamics will say results good enough Stanford award 136 Model Aviation Eke. Quality r S 937 x 156 x 175 18 oz 46 oz torque Years development have produced finest state-ofthe art receivers ever made Flight tests over country haveThe workhorse Ace servos Perfect Patternships Quarter Scale Boats Cars proven receiver will fly others fail Solid glitch-freeapplication high power required performance air plane attitude frequencies/channelsLIIIIIJ 14G20AAtlas Servo Kit$2395 Available Z7 50 53 72 75mHzAC 14G2OACAtlas Servo assembled$3146 12G70 Silver Seven Receiver Kit$3895 Available dealer order direct add $200 Ace RIC 116W 19th St Box SuB Higginsville MO 64037 816 584-721
Edition: Model Aviation - 1986/08
Page Numbers: 34, 35, 36, 37, 38, 130, 131, 135, 136
Bill Winter _____I3 EO 0 Plane Talk_______ OFF TO SEE THE WIZARD PA system blasted Light Horse Cavalry Overture Continentals 727 leaned its California leg out Denver hub West days Continental gimmick iron bird human terms Cross goal line leap hurdle lift bale Rotation music stopped Clapping hands cheers Seat belts prevented standing ovation Touch down Ontario came overture reach its wild climax magic carpet turned onto taxiway Encore Super ghostly 727 making music endlessly crisscrosses snowy peaks Jack Benny land Anaheim Azusa Cucamonga Watch step Cucamonga plane doesnt land Actually Rancho Cucamongaonly few miles Ontario Airport sitting patio February staring cardboard cutout mountalns 94 dry degrees shade enough whiten steers skull Incognito escape dead-stick mind Bill Evans found wizard wings 250 miles away Bishop fullsize sailpianers famed standing wave will loft 40000 ft beyond would budge although Dasher 40 crazy Des perado speeded-up modified Krackerjac tail Guys ribbed him much went fishing two weeks High Sierras Ill send friend Arrow pick up got foggy four days early morn beamed up patio announce will fly Gadzooks Fog now houses everywhere Guys thereeast south Los Angeles like strolling street players used work North Chicago family-style oases ends streets Three blocks away could fly Electric no fuss Ten minutes drive found nearly mile square flat field throughway far enough off safe Douglas plant distance paved highway fly off curbed lines car appearing distance about 20 min utes Small groups pairs trios kept arrivingmaking few flights departing join other similar groups Never saw club field hotshot pilotexcept Wizard Bill Evans Some dont see model magazines much else guess have ball hacker menagerie taught guy fly lickety split No knew either Evans Just two boys thought flying 60 Desperado mixed up version radar-timed police air show average roughiy 170 mph two runs upwind downwind long diving entries found critter has piped K&B 21 making similarly piped version K&Bs new plainbearing engine grudgingly agreeing bit span Trust keeps saying After view ing videotape 60 tape now AMA Museum AMA Executive Director John Worth muttered thing violates thing weve taught Dont think flying wing unstable stabilizer essential anhedral does workor technical articles diagram principle dihedral thing violated aerodynamic laws being immutable mind-set us have about everything familiar Seeing believing air ocean downwind turns and. some other time Youll remember 6-ft-plus Krackeijac itself modified early smaller threechannel ship 60s recent spoiler article Evans discussed 3141 airfoil evans Cranks up K&B piped 21 version Desperado prior Winters foray Star Wars found strange bird possess both neutrai go-where-you-point-it hands-off stabiiity no-taii detente know Evans kept Kracker jac after offering ship East whereas Winter has exact dupilcate Desperado lifting section two-thirds thickness above centerline provided l1 angular difference between wing/stab 20 dihedral skinned-foam wing tail OS 60 power Nice indeed got fly have Desperado mind has severe anhedral huge billboard vertical flying wings go like scat D unique stays pointed having flown found pussycat used high cruise also hands-off stable strange docile quick sport job bash around Sundays As easy fly conservative wingy cabin Krackeijac Desperado probably builds one-third time No orientation problems weirdly-configured wing until got too far out going away fog fringes suddenly looked like three-bladed prop Which two blades wings left two right two bottom two knew what next Since would sit handed transmitter Evans word Orientation 200 yards off no brave old pilots Space glorious space Psyched up back future Iknew Icould fly aerobatics Californiais Land Can Virginia Land Cant Back little flying site nice know am 20 years younger Aerobatics did high-jinks go 34 Modet Aviation After Bill Evans enticed Winter building Evans orange Krackerjac framed against genteel version Simitar flying wing snow-topped peaks Bishop ver old boy pound flesh Evans sion has balsa-skinned foam wing stab buiit new version Krackerjac a %l/ foil 1 1/2 decalage fiaperons stabilizer bitter pill swailowi Un- OS 60 Locals ribbed theflying-wing man expected fate brought two together badly go fishing two weeks some pisin fun flying under low thin fog mile square field just south LA Pleasure find Don Lefferts didnt have look very hard find Brown Teico CO-2-powered Mirage FF Plc shows blown-up version larger Herkimer CO-2 After WW ii engine mass production columns custodian sees good ies everywheresuch turbulator spars lines Fubars Ramrods San Diegans Left Whats different about Goldberg J-3 Cub its beautifuily built chocolate sprinkies thats ciuc Builder Dave Peitz isa member AMAs Sound Committe decided evaluate noiseless Scale model Hidden between cylinders its dummy twin Astro geared 40 whIch spins 13-8 Rev-Up 61/2 7 mm realistIc power flight Oh yes has soared Its all-up weight 91/i lb Right cowl removed removable ply box mount shows firewall extended forward Front plate 1/4-ln ply holed cooling Because motor has protruding brushes inserts rearhence bolt-on box Dave uses Teie-Tach measure rpm flight telemetry allowing precise prop comparisons Condor Hobbles device utilizes tiny transmit ter plane photocell pickup reads rpm through hole cowl Data transmitted hand-held meter ground Left inside story Three rows six 1 2V cells iSin Pack rests four1/s-in-sq pieces glued floor 3/4-in-sq across fuselage rear pack prevent sliding similartop crosspleces fitted under ply longerons hold-down Internal antenna attached strip runs aft strengthen gear accurate tracking wires attach ply fairings smail metal cable clamps Electric J-3 required downthrust considerable right Peltzs mods will added Goldberg plans Right asked what type four-stroke has Dave replies Wililams/Astro 40 aboutthe small exhaust pipes explains keep quiet heturns motor curious filp out Engine made fourWilliams Wright cylinder kits scrap balsa Tached 6250 rpm ground itturns 7250 air man named Gus mention Dr August Raspet discussion Al Backstrom MA April brought back flood memories Howell W Gwin Jr writes Beaumont TX went high school son David Starkville MS graduated Mississip pi State 1959 degree English remember Dr Raspet well about dozen us modelers Starkville profited Dr Raspets interest took same delight models did Richard Johnsons RJ-5 Although leading authorities boundary layer control always time talk airplanes us Id hate count number models constructed part scrap pile shop primarily interested Towline Gliders PAA Load inthose days Ihada Left Picture-perfect Schweizer John Hartafleld spans 6 ft weighs 4 lb has 600 sq area 20 OS four-stroke turns Graupner 1 031/a prop Locals wondered enough power pull John wonders will make stow plane ilke original Right Black pinstriping sets off modified plastic canopy emphasizes edges pretty orange-and-white color scheme Dummy cylinder gives authentic twin opposed look thats 0S side-mounted right Neatly painted pliot earphones scans realistic instruments August 1986 35 Left Winter lecturesthe Munchkln piioon iaiurs latest masterpiece 75-in Chinook Canadian uitraiightkita German import redand-white Scale museum piece model flies like trainer its 05 40 four-stroke pusher Right Removable canopy home helmeted pilot comes kit can look instrument pylon feet Metal tail boom struts some tough plastic plywood Left Covered painted trimmed reflections dancing polished surfaces Pilot seems have left hand tiller-type control slight pointed-down tilt thrust line Rudder pushrod external elevator rod appears hidden inside tall boom Right Precisely fitting ply pieces auto-align key mid-ship structure Including pylon takes two wing panels flush ala gliders Thermic 50X showing basics drag reduction helped get 301 glide ratio out designed propeller shroud Jasco Payloader Spitzy 045 vibrated too much lent us copies Frank Zaics yearbooks admitted freely learned great deal Zaic wasnt scholarly books about aerodynamics taught us about stability drag reduction Reynolds numbers knowing born teacher never lost enthusiasm sheer wonder flight dont think ever quite sure whether old solid wood Scientific Control Line models really airplanes always interested what did encouraged us build plastic models fly college swimming pool learn effect various control settings Gwin continues also streamlined clay get better glide performance almost drowned process Dr Raspet said could see airflow put potassium permanganate nose leading edges pool declared off-limits models very soon afterthatIwonder Dr Raspets Purple Plan loved soaring considering purest possible form flight used gliders research Some early activities involved chasing buzzards Sailplane movie camera Gus Raspets Buzzard Patrol well known Starkville still remember lovely calm morning flew over hangar about 300 feet up whistling theme High Mighty Thats decided Lhadto learn fly gliders heard father doubtful about safety airplane no engine took time talk him convince him gliding wasnt dangerous powered flight worked Dr Raspet Aeronautical Experiment Station time con sisted ramshackle Quonset hut blown wings mention often over 300 pinholes per square foot precise grid pattern got very tired pin vise dont remember Tailwind have very fond memories oper ating camera tuft-studies warsurplus flat-top Laister-Kauflnann gliders used research Dr Raspet founder Mississippi State Glider Club provided single-place Schweizer 1-19 glider learned fly glider being towed down runway just below flying speed bodyless 1938 Ford instructor inthe tow car signaled pilot way move stick rudder pedals until became automatic As became expert speed increased until left ground proficiencyand grad uated 100-ft rope 900 turns final step education 500-ft rope gave us enough altitude fly landing pattern point took ourflrst dual instruction Starkville EBO Mason Sumter Pappy Camp flight instructor Charles Lindbergh Dr Raspet lent club Olympia sailplane condition restore ourselves would often stop shop late night either help us just sit drink coffee tell stories Lord did have stories Most us agreed wed rather have Dr Raspet talk peel off old fabric rebuild ribs Ive rambled far too long about guess should stop Howell thinks bot tom line Dr Raspet finest human beings Ive ever met will always special because warmth interest other plane-struck people ages hate presumptuous think Dr Raspet would like being remembered just much tremendous contributions world aerodynamics telling Gwin used word last paragraph may have known him can remember Gus Raspet Fiddler roofTradition Tradition Don Lefferts tapped knee little rubber hammer leg jumped Its gray Mondays inspired go fly circlingbuzzards Lefferts vintage auto restoration otTheat escape models Im mood see going Ive charglng cycling listening sad stories told battery packs just got back Nats Don leads off flew own-design C02 called Image Its sort compilation Old-Timer FF designs stretched pulled shape use Brown Telco-size motors Ive loaned out plans several flying Wouldnt know friend built flies better ship photos large Imageblown up use old Herkimer OK COz motor Bill Browns tanks Au Yes created worlds 36 Model Aviation Left John Oldenkamp San Diego two Lanzo props 18-in version nose 16-in version foreground Smailer proved better performer two Right Stick cabin versions Lanzo combo Text has Oldenkamps OT thoughts famous engine Brown Jr shows great promise also took FF Old-Tinier called Tlush Mite Don goes trying trim Imanaged one-bounce landingintothe side perfectly-restored 1957 Chevrolet parked line 50 ordinary cars belonging ordinary mortals beautifully-finished car belongs Sal Taibi Sal gracious gruff made feel like little kid Fooey Ed Restored isnt quite correct word Sals old car Maintained would better Sal original owner has driven continu ously since car new Fooey no doubt way vintage car guy would feel about himself clobbering Sals classic massive C02 Sal always gracious seemingly gruff Don flown i-scale Laser car would have seen gruff Jd bet Mr Tradition Taibi inter ested rendition ye olde pylon FF An Ebling Phoenix-like fuselageflat bottom sweeping curved top Surfaces remi niscent Fubars Ranirods San Diegans ancient thick undercambered alr foil prior 1950 foiks like Pete Andrews John Zalc Frank Ehling went climb then-thin lO-percenters knife-sharp lead ing edges Stab tilted RCers No cockeyed up right glides right tricky skinny pylonextending down fuselage bottom Does lean typical right power turn turbulator spar top bottom mains another aft bottom spar Golden Age polyhedral pop-up tail fuse de thermalizer Sal gonna park antique near crazy Free Flighters youll need gruff act havent made twisting climbers slow-motion glides since early SOs RC means no chasing early SOs RC planes usually crashed flew away made chas ing ridiculous Ive notions FF unlike Lefferts fun critter old Fire cracker MAN Pasture flights evening swarms barn swallows harassing its silent circles see now 035 electric motor five 500 mAh cells would need bit biggerjust rudder control retrieval shutoff maybe prevent seeding clouds Can get away Bob Kopski thing fascinates about Dave Peltzs not-too-modified Golderg J-3 Cub Electric power something might expect ingenious Sailplaner mastery computers knows geared Astro 40 cobalt 18 cells 12 Ah capacity turns its Rev-Up 13-8 prop precisely 7250 rpm horizontal flight 6250 ground Missouri Well son guy meas ures in-flight rpm via telemetry Condor Hobbies Tele-Tach consists tiny transmitter mounted plane tiny photocell pickup taped motor facing forward sees prop turning through bottom hole cowl Data rpm trans mitted handheld meter know this 1000 ground/air rpm dif Continued page 22 Y BI t x B2 -A-~1~ Y *1 B3 C Winters brain teaser month Figure standard expianation dihedral works B2 figure seems suggest anhedrai wouid unstable People like Evans have proved though case See text discussion August1986 37 Digital LCD tachometer has dual scale lox-i oox stable RPM readout Full scale voltmeter can used check/cycle TXIRX battery combos Reads load up 20 voltsand DC ammeter used check servo current Will find worn binding stalled servo conditions w/SCA1 Battery included 90 day warranty 4 Function ACCU-TACH $8995 ACCESSORIES OSAl -Quarter Scale Adapter ATi & AT2-500ma load.995 SCAl -Servo Current Adapter Airtronics Futaba Kraft 995 TLB1-Voltage Probes.295 CC1-Carrying Case will hold ACCU-TACH accessories. 1295 Send check MO NorCal Avionics A-B Tech Inc 5689 Glasgow Troy MI 48098 313 828-8210 MI add 4% tax Add $3 S&H See dealer first ATT- CHEKi ON-Board Battery Tester Saves Time. Saves Models BAiTCHEK RX-1 ein 5 usA Special Month 3/32x4x36 C Price good until Aug 1 1986 Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Protune corp 914 4626452 PO Box 1808 Poughkeepsie NY 12601 AMA CLUBS Ask about AMA Club Discounts minimum orders $10000 12020 Cent ralia Hawaiian Gardens CA 90716 213 865-3220 ference roughly one-sixth what wed tack ground takes guesswork out propunloading daily lotto game quite edge Dave accurately comparing props right now date finds Rev-Up better others tested farprobably due its thinner airfoil thinks As will see pictures J-3 nifty often stared bouncing gas indicator front windshield fullsize Cubso depressing short cross-country hops against wind cars would pass Using servo-actuated switch Daves J-3 gets 6 7 mm motor run has thermaled now Astro controller throt tle probably giving him 10- 1 1-mm run plus whatever glide time can get Climb realisticwhich what wish match type have sense scalelike flying 13-8 7000 has surprising brute pull hefty torque Peltz cautions everyone Electrics prop hitting dainty hand wont stop like glow engine therefore have arming switch Thats gospel Carl Goldberg Electric run wild adjoining room 3 am gets out bed no arming switch forgot turn off receiver weve done airborne pack faded dutifully turned on/off switch did hear guy Giant Scaie gassie started its Quadra way night didnt Pelts found electrified Cub required additional downthrust significantly right thrust gross 9 lb handled easily gear beefed up ensure accurate tracking ground handling tail wheel wire bent ard decrease ground-stance anglewhich also improves ground handling true tail-draggers Taking Tony Nacca ratos advice hes master big-scale Elec tics Dave twisted out both tips starting about two-thirds semispaninsurance happen slow up too much higher wing loadings Dave built J-3 because AMA Sound Committee As Sailplane man knows about silence does seem relate subject J-3 valid tool among others unpleasant war keep flying sites Dave gets asked about tiny stacks scalelike dummy engine big enough show easily runs turns switch find average Joe has never seen Electric Such guys dont believe thrust permitted hold J-3 Too heavy fly say Eating-crows getting scarce Daves summary noise prob lems facing future think Electric flying has grow popularity present weakness still batteries heavy energy limiting However expect well see some improvement area next few years will short time Electrics performance has doubled due better motors improved battery technology Incidentally Carl Goldberg Models expec ted add considerable Electric information kit plan because Pelts findings John Hartsflelds Schweizer tow plane speaks have published pictures series experimental RC low-wingers big its power pleasing perform ance K&B/Veco 19 spans 6 8 ft time got plan requests Hands-off soaring main objective three channels couldnt quite get combinationthough know now should have enough dihedral put tips line lower edge cockpit Continued page 130 38 Model Aviation NEW Balsa Spruce Plywood Mon Fri Kit Mfg match current prices 8am -4pm now paying better quality PST Open Public 40-60% Discounts BE PART OF AVIATIONS ANNUAL REUNION.. INVITATION TO YOU can help assure com memoration historic achievement continues opportunity par ticipate important ceremonies Societys other programs made available people young old As member will receive Societys quarterly newsletter FL YER will invited member tend participate December 17 ceremonies Memorial First Flight Luncheon unveiling honoree First Flight Shrine As member will have unique role helping assure pur poses Society met important work First Flight Shrine continues recognize honor have accomplished significant firsts aviation people might enjoy membership Society participation its programs informed opportunity PU RPOSES First Flight Society non profit memorial educational torical organization incorporated State North Carolina Its history traces 1926 Societys objectives organize conduct sponsor cosponsor promote otherwise cause appropriate ceremonies events held annually anniversary site elsewhere commemorating first powered flight Wright Brothers achievements contributions development flight encourage invite promote visits historic site people near far may see first hand birthplace powered flight foster promote public awareness widespread interest origin history future ffight its forms FIRST FLIGHT SOCIETY PO Box 1903 Kitty Hawk NC 27949 N AM P STREET CITY STATE __________ZIP Member $20 Business$l 50 National Corporation$5 00 Dues Contributions tax deductible Sorta Pitts/Shepherd Continued page 127 especially model gets air smoker really putting out roses first though took quite few flights get trimmed out model will little different keep mind arrangement shown starting point getting model adjusted fly way want have built flown monoplanes past remember different ball game wont handle same monoplane Have fun Plane Talk/Winter Continued page 38 like Rubber Scale jobs procrastinated doing redesign would have such dihedral nicely-tapered wing still tail-dragger almost spitting image Hartsfields ship romantic open cockpit Hartsfields plane answer anyone wants such aircraft However modest dihedral suggests fourchannel controls grand sport airplane plans MAN published Specs reported John span 6 ft area 600 sq weight 4 lb power OS 20F5 four-stroke prop Graupner l0-3i locals believe engine should pull okay will will beautiful John made dummy cylinder opposed twin look hard tell right-side cylinder working two-wheel gear simple sturdy scalelike cowl removes readily Location vertical tail allows simple one-piece elevator top deck suggests fulllength straight line fuselage dont know canopy stock modified home-brew unless want exact scale could almost anything canopy/open cockpit motif orange-and-white scheme accentuates long graceful wings ship proud Dont worry about climb power eight-footer climbed better six-footer flying wing will get high could possibly wish stab big enough keep bird step warm day supposes could maintain cruise fast idle wont airplane dummy pilot Chlnoolc warm moist southwest wind SP5 St 8I S Iie BENTOM BHOWN JH CAMIjilLL COMET- COVERITE DUBRO EAsv BUILT MODELS ENYA FAt FLYLINE Fox GOLDBERG- GOLDEN AGE REPRO IGENE DUBOIS- GUILLOW- K&B- K&S L R AX PACTRA- PECK-POLYMER PERFECT RN MODELS SEAGLEN SIG STERLING SULLIVAN SUPER TIGRE TAFFINDER TELCO- TOP FLITE WILLIAMS & OTHERS IESTES MODEL ROCKETS Send $100 Cash Check cc Stamps fop osac 44 page tabloid sise DISCOUNT Catalog 900 itlustraionsover 700 Kits choose MAILORDER PHONEORDER IN STORE ILLET 30137 CENTER am St LauudalmFa 19445 coast Oregon northward descends eastern faces Rocky Mountains Its appropriate name ultra-nice ultralight does explain peculiar lack awareness ultralights among us least two fine magazines filled full-color pictures reports projects just like other home-builders magical craft factory-produced kits flyaway planesthings like 50 mph lookalike Cub Citabria have images hang gliders grasshopper cuties open-air stuff wires struts over placeand immensely popularyouve missed boat Ive met first enclosed ultralight model flesh Im fascinated Kaluf blew red-and-white pusher lovely canopy big enough family goldfish Also Stoip Starlet buy locals word should law against anyone builds like spans 78 has 914 squares 40 two- four-strokes has OS four-stroke four channels Its Scale kit Canadian ultralight imported Germany means exquisite engineering requires patient assembly ingeniouslyfitted parts cut what seems like micrometer exactness Believe dont give tinkers damn about commercial plugs unvarnished reporting European plywood can different use whatever woods best suit purpose such limewood Plastics different strange-looking/smelling glues stick absolutely anything Enough photos deserve scrutiny Incidentally Bill Kaluf generally takes three months classic flying machines says complicatedlooking thing done six weeks half usual time wont take questions will forward letters Ships legend empathize fully peaks valleys starts off John Oldenkamp San Diego CA having growing up poor doing aeromodeling vacuum wait until 40th year witness True Flight ie Loss Airplane Through Thermal Activity acronym LOATTA have nothing against RC just have yet graduated finger control have Airtronics Monarch boards Project tonight John warms up tissuing 1937 Lanzo Combo Stick/Cabin jobfar too much time drawing up Zaic threeview bending hoops ribs teeny spars dog got up bench after housefly smushed whole tail Rebuilt recovered first red airplane Fourteen pieces paper wings beaut Two gigantic hand-carved freewheeling props 130 Model Aviation RON CHIDGEYS TIGER TAIL 4 ggg sq Sasic Kit 5118 Fihsqt.s Ps P. C vallatIs doss ml CABiN RIC PRODUCTS 112 IttaIs St Idaysts LA 71505 318 2327448 BYRON ORIGINALS E PCI lly. Practical Twin Ducted Fan Project Thousands satisfied modelers currently flying Byron Originals jets serve proof release kit can sure project can confidently build fly st dream designed built flown its designer few others new F-iS Eagle no exception F- 15 designed around proven Byro-Jet Propulsion System its twin Byro-Jet Fans turning nearly 20000 rpm producing 24 241/2 total pounds thrust Eagle delivers speed rate climb maneuver ability expect Byron Originals jet Unique Exclusive Components new F-i 5 far too numerous attempt describe magazine ad Detailed Info Pack includes brochure owners manual set reduced construction drawings kit pricing send $200 Get full story F-i 5 its long list exclusive features Custom Retractable Main Gear lutionary New Nose Gear Design matic Landing Gear Brake System Functional Pneumatic Speed Brake iled Fiberglass Fuselage Factory Installed Formers -in Wings Stabs Fins Precise Construction Methods Specifications wing Span 70channels 5 w/retracts Length 89 7 wls peed brake Ready-to-fly weight 28 lbs lending gear brakes Power - Twin Byro-Jet Performance Systems w/Rossi 81 orequiv Byron Originals Box 279lda Grove IA 51445 Ph 712 364-3165 also red Nice 2-in-dia wheels sanded out filled polished painted black Have set both up bench Since no admire mc share Pretty things Red always preferred yellow Until today Nearly ran out covering paper batch bought 15 years ago Now alcohol-shrink water Warps bad remember Forties nobody ever mentioned alterna tive beasts going get aerobap tism next Sunday over near Las Vegas OldTimer meet Oldenkamp goes VAMPS thing huge dry lake Reservations made Motorbike fueled up ready Have never Im certain will like rendition Lanzo huge vertical tall will blow minds isa pre-something ship defies modernity Looking prop specified judg ment great Chester Lanzo must have out mind quote 18 mill sol made up modest unit 16 high pitch will fly buggers like fly P-30s have sense will take photo graphs before sticking air maybe will rain blow will sit motel just plain talk am puzzled John says whet interest gravitate retrograde devices deep inside know squaretipped flat-bottomed mostly-sheet bird will run circles around what have just spent three weeks a-building eyes fingers hurt have shot up precious stash red tissue am fighting warps inch way Put nasty cut thumb carving props buck knife sucker will probably terminally tail heavy wind up will Mercury Seven Flight Phoenix Wright brothers over again Chester Lanzo hope nice guy four years old Lanzo launched prototype creations six Korda wowed guys back East did know Gas gasoline nor heard Maxwell Bassett interim aeromodeler hordes bridged too-young-to-know period now recognize Golden Age Modeling hoarded glue duringthe scarcity WW II days Balsa diverted military purposes flew paper airplanes out barn top did lot pretending fly airplanes whatever sort interest fueled world events As 12year-olds volunteered painfully scratch out identification models school thrilled whenever stray Selfridge Field P-47 passed over Oh elliptical planforms fat undercambered ribs hundreds hunks fuselage funky wheels bamboo bits Wonders Oldenkamp What wrong people design weird difficult gizmos Thank God now Hot Stuff good wood real razor blades T-pins Celotex building boards like None begins explain still build difficult old models John thinks case Half Korda all-sheet exercise Ed MA plan No 125 $1 75 led chase through Zaic yearbooks looking perfect most-beautiful model first disap pointment course instant discovery Old-Timers featured complex multi-curved outlines dumb fat proportions etc people nuts least current standards Cranks masochists build OldTimers right Ever made Korda Wakefield John asks What winners fly same straight up slight right spiral low dip glide off somewhere usually much need dether malizer Unnerving Spectacular cabin jobs accidents design insofar aerodynamics concerned probably masterpieces romance lore Zaic yearbooks usually listed longest flight achieved particular model fre quently somewhere between 12 42 minutes Powerful binoculars days strong legs maybe chased Model As got job done built flew crashed know did exist art form very much worth effort duplication discovery preservation things once done recreation miasma long since committed various libraries touching process creation however arcane immense delight am digging up past lam basically refaniiliarizing myself moments disappeared over hill far too quickly rush puberty manhood Long live Chet Lanzo Long live rubberband Red airplanes hope curse assumes some time passed before Oldenkamp added PS about flight experiences Rambled off 375 miles Henderson NV over weekend VAMPS Las Vegas Antique Model Airplane Society Annual Nice folks Vast site warm buoyant air hardpacked shiny dirt crust underfoot Magnifi cent mount scarps Stayed funky casino just three miles Hoover Dam sharing space noise Lake Mead drag boat crew WeirdContinued page 135 August 1986 131 F-l5EagI 1/7 Scale Exceptional Performance True Byro-Jet Style. iake-off distance paved runway less 250 feet little practice nose high landings predictable F-iS climbs authority good steady rate has solid positive groovy responsive feel Engine out performance outstanding ight trim changes enable hands-off straight level flight no need land until youre ready Plus Byron F-i 5 offers unlimited scale possibilities its priced com petitively other twin engine jets comparable size E E PERFORMANCE Step-By-Step Instructions lete Rolled Plans rate Machine Die Cut Balsa Spruce Plywood ce Spars Launch Strength TH HAND LAUNCH E HI-START H 59 Span 15 Oz 2 channel 370 Sq Area computer Modified E-193 Airfoil DAVEY Eh1SYSTEMS mwm CORPORATION ONE WOOD LANE MALVERN PA 19355 215 644-6772 Plane Talk/Winter Continued page 131 Lanzos fly Trembling nerves withstanding model got assembled photo graphed loaded modest amount rubber45 grams modem stuff Dry whole model weighed mere 100 grams 300 tenuous turns beast off its maiden voyage stally putted around sorta right kinda up came down near cars dented shiny red prop Darn shouldnt make trim change time appeared ship needed right down thrust plus some weight up front cure stall Added Y16 shim taped quarter nose second flight went up smoothiy same turnsgoing nowhere looking safe turns Risking packed 900 Fortunately lit DT fuse model shot off rapidly climbed throughout entire prop run hooked boomer soon become speck red looked great Itwas up about 7mm landed sight half-mile downwind retrieved foot san dals plopping along dry lake surface certainly thrilled gave toast C Lanzo now know built ancient heap understanding era investigate trace mind handiwork greats build some trust perhaps methods gain perspective probably little respect aeromodeling rootsnot within awareness until now Hope can find red tissue China connection Joe Tschirgi remember tailless Giant Stik May column paid dues retired English teacher Ninjing taken lightly book experts love argue such stuff offers correction make no arguments Just read Subject statement March 1986 issue MA concerning flying planks heavily reflexed airfoil makes stable Facts 1 Airfoil camberpositive reflex inverted zerohas nothing static stability 2 Youre certainly alone belief 9999% knowledgeable modelers surprising number full-scale aero en glneers would agree ie think reflex airfoils have stable center pressure travel Explanation 1 Static pitch stability aircraft rate change pitching moment angle attack 2 conventional air foilsthick thin cambered symmetric re flex inverted flathave constant aerody namic moments usable angle attack range 3 purpose reflex camber tailless configuration provide nose-up moment like angular difference tailed aircraft trims vehicle usable lift co efficient 4 NACA NASAs predecessor habit presenting airfoil Center Pressure defined moment divided lift led misunder standing stopped publishing meaning less confusing data conjunction airfoils over 50 years ago 5 center lift Aerodynamic center AC lift curve slope airfoil section parameters have significant influence static stability Both essentially fixed values AC 25% chord Ct/a0 1 per degree identical very few percent airfoils ie AC does move angle attack Repeat Does move Proof 1 Take old Free Flight wing junk pile Mount stick fuselage big fixed vertical fin aft wing 2 Mount big flat plate drag area about 2i chord lengths above wing Required area depends wing camber the 10% wing good starting point 3 Balance thing 15-18% MAC try hand glide Use usual trimming procedures remem ber drag area same thing angular difference the 4 Youll find thing glides stably inefficiently Obviously least drag area combined aft CG can get away will produce best glide Years ago eminent engineer presented lecture DCRC Club significant number odd configurations model glider form would work among glider suggested Tschirgi Van Hattum retired Holland used similar examples including Joes teaching July-August 1973 issue Junior Modeler Van Hattum published fasci nating article including nine radicals three-views picture achieved Joes result merely using tail vertical square stick projecting aft end fuselage Article title Gliders Nine Going sublime ridiculous heres teaser dihedral Theres diagram dard explanation dihedral works armY longerthan armX lift results Y side plane returned normal flight B 1 plane anhedral stable Yes Consider Evans Desperado quite stable full-scale examples So B2 arm Y shorter arm X Now correct can example B2 stable Shouldnt roll out control Continued page 136 .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74 3 Pak$495 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit5395 P0 Box68132 AIRCRAFT CO Portland OR 97268 Ready Fly$795 Add $3 postage handling first 2 packages 10 additional DGA Designs 0 D0A00 DC Designs 0 0 0 Cs0 0 j C o5 0 0 QuarterMaster 1SPORT BIPE S QUARTER SCALE PLANS Quarter Master Sport Bipe8 1f Guadra 35. 73Spafl.EZ build. Great Flyer.Semi-Ki AvaIlable..PPO 0 DAVIS D-1K sOaSpan. 0 Ouadra 35 power Similar. PPO CC 91933 KINNER SPORTSTER 5Modet K.117Span 035 power pPo5 5 _ oCs 4-CYCLE PROJECTS AKRON FUNK 15 Scale 54 Span deeCs 4 cycle. FantaStic FlyerPPoeI ________0 DAVIS D1K* 603 Spar. cycleorsirnilar..rP051D Two Inch wale Sieth scale _____________0 Cs 1933 KINNER SPORTSTER88 Cs Model K.75 Span. el-75.4cy PPO$ I110 Photo reduced try, Id Scale Plans oro Inch scale SIxth scale ________0 00A Plane0 cowing C PHOTO DOCUMENTATION PACKS available- 0 Scale Plans ALL PLANS ROLLEDSHIPPED UPS Conpleteelnstroctien Booklet Send sl00 Catalog O New York State Residents add 7% sales tao. Send check J o MO Os. Allow 3weoks tOr cflecktocleer Cs mU m] j [Ci st 1986 135 IfyoushouldthinkofslipflOtethatB3 what youd see wing RC pilot OK know better say matter relative wind acting upon dihedraled wings banked turn inside wing has greater angle attack outside stabilizes fun Does centrifugal force play part location CGthat high low pendulum effect What does presence centrifugal force banked turn know nothing Dont ask offer C old-fashioned turn-and-bank indicator instrnment tilted would leftbanked turn slip skid yaw equalized pilot coordination ball cen tered skid greater ball would move toward right side slip greater ball sinks toward left side plane itself can center ball what modelers call spirally stable piloting input required neutrally-stable moreacrobatic craft machine man together still center ball ball will center design has some deficiency difficult fly unflyable Whimsy flat-winged Stik close hands-off FF flat-winged Lacey Fike will fly OK Air three-dimensional often think terms two dimensionslike diagram Drop wing aileron pull upelevator model whips around know wing loadings go sky high high some times small heavy models youll snap out control plane pushing agalnst alr toward outside turn its angle attack affected holding upelevator wing perhaps nearer stall large part due centrifugal force free-to-pivot pendulum hung beneath belly would point wonders about Frank Zaics book Circu lar Airflow available AMA Supply & Service Section wondered about airflow phenomenawith turn-and-banked aircraftmany years ago Ive models would fly themselves around 360add bit nose weight becomes 720 vice-versa until cant hold 360 Such models seemingly can fine-tuned go neutrally stable banked circles yet flying hands-off neither recover ing nor degrading continuous-banked turns Argue leave out dont know nuttinunless name Tschirgi Planes wonderful things Perhaps ought wonder Bill Winter 4432 Altura Ct. Faitfax VA 22030 Radio Technique/Myers Continued page 41 redundant RF link Roland Spicer fascinating person talk pursued dream setting RC cross-country record great care intelligence describes event enthusiasm would credit much younger man can see Roland airplane description flight RC Video Magazine Volume 3 plane scale model Wallace Beerys Bellanca dedicated Rolands lifetime friend Allison Buck can seen hanglng ceiling AMA museum AMA Headquarters building Reston VA Ask Hurst Bowers tell about case havent noticed better times interference- reliability-wise rnshing down us George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Aid/Edberg Continued page 43 forklift required four RC channels launcher required two platform up/down launcher release decided use single transmitter con trol both gadgets same time wouldnt need juggle transmitters running experiment decided use trusty Futaba J Series system needed least six channels available Because two receivers would inside vacuum chamber made 1-in-thick solid steel walls felt using J Series quite reasonable transmitter shown behind forklift shots way radio signals get through receivers inside chamber through small Plexiglas window concerned two receivers same fre quency might interfere other both RC systems performed flawlessly through testing As far know first time model RC system has operated vacuum two receivers sub jected share electrical noise motors powered both forklift resetting mechanism launcher noise did affect operation receivers made big racket FM receiver used gather data telemetry system later found out several companies manufacture brushless DC motors supposed operate vacuum out generating electrical noise Next time Im using vacuum Ill give try Both forklift launcher pow ered sealed lead-acid D cells having 4 Ah capacity huge batteries known safe operate vacuum recharged after days testing constant-voltage charger case forklift extra weight lead-acid cells helped provide extra traction driving around foam rubber However often quite enough made snow tires pushing staples facing outward through tires cured traction problem launcher forklift arrangement worked extremely well After bit practice became proficient enough two oould have specimen back top launcher within 2 minutes may seem long time until consider specimen bounces ran domly foam-rubber-covered floor takes 90 seconds just recycle launcher case much less time 20 minutes needed recycle vacuum chamber wont go details results testing because really terest people field space craft dynamics will say results good enough Stanford award 136 Model Aviation Eke. Quality r S 937 x 156 x 175 18 oz 46 oz torque Years development have produced finest state-ofthe art receivers ever made Flight tests over country haveThe workhorse Ace servos Perfect Patternships Quarter Scale Boats Cars proven receiver will fly others fail Solid glitch-freeapplication high power required performance air plane attitude frequencies/channelsLIIIIIJ 14G20AAtlas Servo Kit$2395 Available Z7 50 53 72 75mHzAC 14G2OACAtlas Servo assembled$3146 12G70 Silver Seven Receiver Kit$3895 Available dealer order direct add $200 Ace RIC 116W 19th St Box SuB Higginsville MO 64037 816 584-721
Edition: Model Aviation - 1986/08
Page Numbers: 34, 35, 36, 37, 38, 130, 131, 135, 136
Bill Winter _____I3 EO 0 Plane Talk_______ OFF TO SEE THE WIZARD PA system blasted Light Horse Cavalry Overture Continentals 727 leaned its California leg out Denver hub West days Continental gimmick iron bird human terms Cross goal line leap hurdle lift bale Rotation music stopped Clapping hands cheers Seat belts prevented standing ovation Touch down Ontario came overture reach its wild climax magic carpet turned onto taxiway Encore Super ghostly 727 making music endlessly crisscrosses snowy peaks Jack Benny land Anaheim Azusa Cucamonga Watch step Cucamonga plane doesnt land Actually Rancho Cucamongaonly few miles Ontario Airport sitting patio February staring cardboard cutout mountalns 94 dry degrees shade enough whiten steers skull Incognito escape dead-stick mind Bill Evans found wizard wings 250 miles away Bishop fullsize sailpianers famed standing wave will loft 40000 ft beyond would budge although Dasher 40 crazy Des perado speeded-up modified Krackerjac tail Guys ribbed him much went fishing two weeks High Sierras Ill send friend Arrow pick up got foggy four days early morn beamed up patio announce will fly Gadzooks Fog now houses everywhere Guys thereeast south Los Angeles like strolling street players used work North Chicago family-style oases ends streets Three blocks away could fly Electric no fuss Ten minutes drive found nearly mile square flat field throughway far enough off safe Douglas plant distance paved highway fly off curbed lines car appearing distance about 20 min utes Small groups pairs trios kept arrivingmaking few flights departing join other similar groups Never saw club field hotshot pilotexcept Wizard Bill Evans Some dont see model magazines much else guess have ball hacker menagerie taught guy fly lickety split No knew either Evans Just two boys thought flying 60 Desperado mixed up version radar-timed police air show average roughiy 170 mph two runs upwind downwind long diving entries found critter has piped K&B 21 making similarly piped version K&Bs new plainbearing engine grudgingly agreeing bit span Trust keeps saying After view ing videotape 60 tape now AMA Museum AMA Executive Director John Worth muttered thing violates thing weve taught Dont think flying wing unstable stabilizer essential anhedral does workor technical articles diagram principle dihedral thing violated aerodynamic laws being immutable mind-set us have about everything familiar Seeing believing air ocean downwind turns and. some other time Youll remember 6-ft-plus Krackeijac itself modified early smaller threechannel ship 60s recent spoiler article Evans discussed 3141 airfoil evans Cranks up K&B piped 21 version Desperado prior Winters foray Star Wars found strange bird possess both neutrai go-where-you-point-it hands-off stabiiity no-taii detente know Evans kept Kracker jac after offering ship East whereas Winter has exact dupilcate Desperado lifting section two-thirds thickness above centerline provided l1 angular difference between wing/stab 20 dihedral skinned-foam wing tail OS 60 power Nice indeed got fly have Desperado mind has severe anhedral huge billboard vertical flying wings go like scat D unique stays pointed having flown found pussycat used high cruise also hands-off stable strange docile quick sport job bash around Sundays As easy fly conservative wingy cabin Krackeijac Desperado probably builds one-third time No orientation problems weirdly-configured wing until got too far out going away fog fringes suddenly looked like three-bladed prop Which two blades wings left two right two bottom two knew what next Since would sit handed transmitter Evans word Orientation 200 yards off no brave old pilots Space glorious space Psyched up back future Iknew Icould fly aerobatics Californiais Land Can Virginia Land Cant Back little flying site nice know am 20 years younger Aerobatics did high-jinks go 34 Modet Aviation After Bill Evans enticed Winter building Evans orange Krackerjac framed against genteel version Simitar flying wing snow-topped peaks Bishop ver old boy pound flesh Evans sion has balsa-skinned foam wing stab buiit new version Krackerjac a %l/ foil 1 1/2 decalage fiaperons stabilizer bitter pill swailowi Un- OS 60 Locals ribbed theflying-wing man expected fate brought two together badly go fishing two weeks some pisin fun flying under low thin fog mile square field just south LA Pleasure find Don Lefferts didnt have look very hard find Brown Teico CO-2-powered Mirage FF Plc shows blown-up version larger Herkimer CO-2 After WW ii engine mass production columns custodian sees good ies everywheresuch turbulator spars lines Fubars Ramrods San Diegans Left Whats different about Goldberg J-3 Cub its beautifuily built chocolate sprinkies thats ciuc Builder Dave Peitz isa member AMAs Sound Committe decided evaluate noiseless Scale model Hidden between cylinders its dummy twin Astro geared 40 whIch spins 13-8 Rev-Up 61/2 7 mm realistIc power flight Oh yes has soared Its all-up weight 91/i lb Right cowl removed removable ply box mount shows firewall extended forward Front plate 1/4-ln ply holed cooling Because motor has protruding brushes inserts rearhence bolt-on box Dave uses Teie-Tach measure rpm flight telemetry allowing precise prop comparisons Condor Hobbles device utilizes tiny transmit ter plane photocell pickup reads rpm through hole cowl Data transmitted hand-held meter ground Left inside story Three rows six 1 2V cells iSin Pack rests four1/s-in-sq pieces glued floor 3/4-in-sq across fuselage rear pack prevent sliding similartop crosspleces fitted under ply longerons hold-down Internal antenna attached strip runs aft strengthen gear accurate tracking wires attach ply fairings smail metal cable clamps Electric J-3 required downthrust considerable right Peltzs mods will added Goldberg plans Right asked what type four-stroke has Dave replies Wililams/Astro 40 aboutthe small exhaust pipes explains keep quiet heturns motor curious filp out Engine made fourWilliams Wright cylinder kits scrap balsa Tached 6250 rpm ground itturns 7250 air man named Gus mention Dr August Raspet discussion Al Backstrom MA April brought back flood memories Howell W Gwin Jr writes Beaumont TX went high school son David Starkville MS graduated Mississip pi State 1959 degree English remember Dr Raspet well about dozen us modelers Starkville profited Dr Raspets interest took same delight models did Richard Johnsons RJ-5 Although leading authorities boundary layer control always time talk airplanes us Id hate count number models constructed part scrap pile shop primarily interested Towline Gliders PAA Load inthose days Ihada Left Picture-perfect Schweizer John Hartafleld spans 6 ft weighs 4 lb has 600 sq area 20 OS four-stroke turns Graupner 1 031/a prop Locals wondered enough power pull John wonders will make stow plane ilke original Right Black pinstriping sets off modified plastic canopy emphasizes edges pretty orange-and-white color scheme Dummy cylinder gives authentic twin opposed look thats 0S side-mounted right Neatly painted pliot earphones scans realistic instruments August 1986 35 Left Winter lecturesthe Munchkln piioon iaiurs latest masterpiece 75-in Chinook Canadian uitraiightkita German import redand-white Scale museum piece model flies like trainer its 05 40 four-stroke pusher Right Removable canopy home helmeted pilot comes kit can look instrument pylon feet Metal tail boom struts some tough plastic plywood Left Covered painted trimmed reflections dancing polished surfaces Pilot seems have left hand tiller-type control slight pointed-down tilt thrust line Rudder pushrod external elevator rod appears hidden inside tall boom Right Precisely fitting ply pieces auto-align key mid-ship structure Including pylon takes two wing panels flush ala gliders Thermic 50X showing basics drag reduction helped get 301 glide ratio out designed propeller shroud Jasco Payloader Spitzy 045 vibrated too much lent us copies Frank Zaics yearbooks admitted freely learned great deal Zaic wasnt scholarly books about aerodynamics taught us about stability drag reduction Reynolds numbers knowing born teacher never lost enthusiasm sheer wonder flight dont think ever quite sure whether old solid wood Scientific Control Line models really airplanes always interested what did encouraged us build plastic models fly college swimming pool learn effect various control settings Gwin continues also streamlined clay get better glide performance almost drowned process Dr Raspet said could see airflow put potassium permanganate nose leading edges pool declared off-limits models very soon afterthatIwonder Dr Raspets Purple Plan loved soaring considering purest possible form flight used gliders research Some early activities involved chasing buzzards Sailplane movie camera Gus Raspets Buzzard Patrol well known Starkville still remember lovely calm morning flew over hangar about 300 feet up whistling theme High Mighty Thats decided Lhadto learn fly gliders heard father doubtful about safety airplane no engine took time talk him convince him gliding wasnt dangerous powered flight worked Dr Raspet Aeronautical Experiment Station time con sisted ramshackle Quonset hut blown wings mention often over 300 pinholes per square foot precise grid pattern got very tired pin vise dont remember Tailwind have very fond memories oper ating camera tuft-studies warsurplus flat-top Laister-Kauflnann gliders used research Dr Raspet founder Mississippi State Glider Club provided single-place Schweizer 1-19 glider learned fly glider being towed down runway just below flying speed bodyless 1938 Ford instructor inthe tow car signaled pilot way move stick rudder pedals until became automatic As became expert speed increased until left ground proficiencyand grad uated 100-ft rope 900 turns final step education 500-ft rope gave us enough altitude fly landing pattern point took ourflrst dual instruction Starkville EBO Mason Sumter Pappy Camp flight instructor Charles Lindbergh Dr Raspet lent club Olympia sailplane condition restore ourselves would often stop shop late night either help us just sit drink coffee tell stories Lord did have stories Most us agreed wed rather have Dr Raspet talk peel off old fabric rebuild ribs Ive rambled far too long about guess should stop Howell thinks bot tom line Dr Raspet finest human beings Ive ever met will always special because warmth interest other plane-struck people ages hate presumptuous think Dr Raspet would like being remembered just much tremendous contributions world aerodynamics telling Gwin used word last paragraph may have known him can remember Gus Raspet Fiddler roofTradition Tradition Don Lefferts tapped knee little rubber hammer leg jumped Its gray Mondays inspired go fly circlingbuzzards Lefferts vintage auto restoration otTheat escape models Im mood see going Ive charglng cycling listening sad stories told battery packs just got back Nats Don leads off flew own-design C02 called Image Its sort compilation Old-Timer FF designs stretched pulled shape use Brown Telco-size motors Ive loaned out plans several flying Wouldnt know friend built flies better ship photos large Imageblown up use old Herkimer OK COz motor Bill Browns tanks Au Yes created worlds 36 Model Aviation Left John Oldenkamp San Diego two Lanzo props 18-in version nose 16-in version foreground Smailer proved better performer two Right Stick cabin versions Lanzo combo Text has Oldenkamps OT thoughts famous engine Brown Jr shows great promise also took FF Old-Tinier called Tlush Mite Don goes trying trim Imanaged one-bounce landingintothe side perfectly-restored 1957 Chevrolet parked line 50 ordinary cars belonging ordinary mortals beautifully-finished car belongs Sal Taibi Sal gracious gruff made feel like little kid Fooey Ed Restored isnt quite correct word Sals old car Maintained would better Sal original owner has driven continu ously since car new Fooey no doubt way vintage car guy would feel about himself clobbering Sals classic massive C02 Sal always gracious seemingly gruff Don flown i-scale Laser car would have seen gruff Jd bet Mr Tradition Taibi inter ested rendition ye olde pylon FF An Ebling Phoenix-like fuselageflat bottom sweeping curved top Surfaces remi niscent Fubars Ranirods San Diegans ancient thick undercambered alr foil prior 1950 foiks like Pete Andrews John Zalc Frank Ehling went climb then-thin lO-percenters knife-sharp lead ing edges Stab tilted RCers No cockeyed up right glides right tricky skinny pylonextending down fuselage bottom Does lean typical right power turn turbulator spar top bottom mains another aft bottom spar Golden Age polyhedral pop-up tail fuse de thermalizer Sal gonna park antique near crazy Free Flighters youll need gruff act havent made twisting climbers slow-motion glides since early SOs RC means no chasing early SOs RC planes usually crashed flew away made chas ing ridiculous Ive notions FF unlike Lefferts fun critter old Fire cracker MAN Pasture flights evening swarms barn swallows harassing its silent circles see now 035 electric motor five 500 mAh cells would need bit biggerjust rudder control retrieval shutoff maybe prevent seeding clouds Can get away Bob Kopski thing fascinates about Dave Peltzs not-too-modified Golderg J-3 Cub Electric power something might expect ingenious Sailplaner mastery computers knows geared Astro 40 cobalt 18 cells 12 Ah capacity turns its Rev-Up 13-8 prop precisely 7250 rpm horizontal flight 6250 ground Missouri Well son guy meas ures in-flight rpm via telemetry Condor Hobbies Tele-Tach consists tiny transmitter mounted plane tiny photocell pickup taped motor facing forward sees prop turning through bottom hole cowl Data rpm trans mitted handheld meter know this 1000 ground/air rpm dif Continued page 22 Y BI t x B2 -A-~1~ Y *1 B3 C Winters brain teaser month Figure standard expianation dihedral works B2 figure seems suggest anhedrai wouid unstable People like Evans have proved though case See text discussion August1986 37 Digital LCD tachometer has dual scale lox-i oox stable RPM readout Full scale voltmeter can used check/cycle TXIRX battery combos Reads load up 20 voltsand DC ammeter used check servo current Will find worn binding stalled servo conditions w/SCA1 Battery included 90 day warranty 4 Function ACCU-TACH $8995 ACCESSORIES OSAl -Quarter Scale Adapter ATi & AT2-500ma load.995 SCAl -Servo Current Adapter Airtronics Futaba Kraft 995 TLB1-Voltage Probes.295 CC1-Carrying Case will hold ACCU-TACH accessories. 1295 Send check MO NorCal Avionics A-B Tech Inc 5689 Glasgow Troy MI 48098 313 828-8210 MI add 4% tax Add $3 S&H See dealer first ATT- CHEKi ON-Board Battery Tester Saves Time. Saves Models BAiTCHEK RX-1 ein 5 usA Special Month 3/32x4x36 C Price good until Aug 1 1986 Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Protune corp 914 4626452 PO Box 1808 Poughkeepsie NY 12601 AMA CLUBS Ask about AMA Club Discounts minimum orders $10000 12020 Cent ralia Hawaiian Gardens CA 90716 213 865-3220 ference roughly one-sixth what wed tack ground takes guesswork out propunloading daily lotto game quite edge Dave accurately comparing props right now date finds Rev-Up better others tested farprobably due its thinner airfoil thinks As will see pictures J-3 nifty often stared bouncing gas indicator front windshield fullsize Cubso depressing short cross-country hops against wind cars would pass Using servo-actuated switch Daves J-3 gets 6 7 mm motor run has thermaled now Astro controller throt tle probably giving him 10- 1 1-mm run plus whatever glide time can get Climb realisticwhich what wish match type have sense scalelike flying 13-8 7000 has surprising brute pull hefty torque Peltz cautions everyone Electrics prop hitting dainty hand wont stop like glow engine therefore have arming switch Thats gospel Carl Goldberg Electric run wild adjoining room 3 am gets out bed no arming switch forgot turn off receiver weve done airborne pack faded dutifully turned on/off switch did hear guy Giant Scaie gassie started its Quadra way night didnt Pelts found electrified Cub required additional downthrust significantly right thrust gross 9 lb handled easily gear beefed up ensure accurate tracking ground handling tail wheel wire bent ard decrease ground-stance anglewhich also improves ground handling true tail-draggers Taking Tony Nacca ratos advice hes master big-scale Elec tics Dave twisted out both tips starting about two-thirds semispaninsurance happen slow up too much higher wing loadings Dave built J-3 because AMA Sound Committee As Sailplane man knows about silence does seem relate subject J-3 valid tool among others unpleasant war keep flying sites Dave gets asked about tiny stacks scalelike dummy engine big enough show easily runs turns switch find average Joe has never seen Electric Such guys dont believe thrust permitted hold J-3 Too heavy fly say Eating-crows getting scarce Daves summary noise prob lems facing future think Electric flying has grow popularity present weakness still batteries heavy energy limiting However expect well see some improvement area next few years will short time Electrics performance has doubled due better motors improved battery technology Incidentally Carl Goldberg Models expec ted add considerable Electric information kit plan because Pelts findings John Hartsflelds Schweizer tow plane speaks have published pictures series experimental RC low-wingers big its power pleasing perform ance K&B/Veco 19 spans 6 8 ft time got plan requests Hands-off soaring main objective three channels couldnt quite get combinationthough know now should have enough dihedral put tips line lower edge cockpit Continued page 130 38 Model Aviation NEW Balsa Spruce Plywood Mon Fri Kit Mfg match current prices 8am -4pm now paying better quality PST Open Public 40-60% Discounts BE PART OF AVIATIONS ANNUAL REUNION.. INVITATION TO YOU can help assure com memoration historic achievement continues opportunity par ticipate important ceremonies Societys other programs made available people young old As member will receive Societys quarterly newsletter FL YER will invited member tend participate December 17 ceremonies Memorial First Flight Luncheon unveiling honoree First Flight Shrine As member will have unique role helping assure pur poses Society met important work First Flight Shrine continues recognize honor have accomplished significant firsts aviation people might enjoy membership Society participation its programs informed opportunity PU RPOSES First Flight Society non profit memorial educational torical organization incorporated State North Carolina Its history traces 1926 Societys objectives organize conduct sponsor cosponsor promote otherwise cause appropriate ceremonies events held annually anniversary site elsewhere commemorating first powered flight Wright Brothers achievements contributions development flight encourage invite promote visits historic site people near far may see first hand birthplace powered flight foster promote public awareness widespread interest origin history future ffight its forms FIRST FLIGHT SOCIETY PO Box 1903 Kitty Hawk NC 27949 N AM P STREET CITY STATE __________ZIP Member $20 Business$l 50 National Corporation$5 00 Dues Contributions tax deductible Sorta Pitts/Shepherd Continued page 127 especially model gets air smoker really putting out roses first though took quite few flights get trimmed out model will little different keep mind arrangement shown starting point getting model adjusted fly way want have built flown monoplanes past remember different ball game wont handle same monoplane Have fun Plane Talk/Winter Continued page 38 like Rubber Scale jobs procrastinated doing redesign would have such dihedral nicely-tapered wing still tail-dragger almost spitting image Hartsfields ship romantic open cockpit Hartsfields plane answer anyone wants such aircraft However modest dihedral suggests fourchannel controls grand sport airplane plans MAN published Specs reported John span 6 ft area 600 sq weight 4 lb power OS 20F5 four-stroke prop Graupner l0-3i locals believe engine should pull okay will will beautiful John made dummy cylinder opposed twin look hard tell right-side cylinder working two-wheel gear simple sturdy scalelike cowl removes readily Location vertical tail allows simple one-piece elevator top deck suggests fulllength straight line fuselage dont know canopy stock modified home-brew unless want exact scale could almost anything canopy/open cockpit motif orange-and-white scheme accentuates long graceful wings ship proud Dont worry about climb power eight-footer climbed better six-footer flying wing will get high could possibly wish stab big enough keep bird step warm day supposes could maintain cruise fast idle wont airplane dummy pilot Chlnoolc warm moist southwest wind SP5 St 8I S Iie BENTOM BHOWN JH CAMIjilLL COMET- COVERITE DUBRO EAsv BUILT MODELS ENYA FAt FLYLINE Fox GOLDBERG- GOLDEN AGE REPRO IGENE DUBOIS- GUILLOW- K&B- K&S L R AX PACTRA- PECK-POLYMER PERFECT RN MODELS SEAGLEN SIG STERLING SULLIVAN SUPER TIGRE TAFFINDER TELCO- TOP FLITE WILLIAMS & OTHERS IESTES MODEL ROCKETS Send $100 Cash Check cc Stamps fop osac 44 page tabloid sise DISCOUNT Catalog 900 itlustraionsover 700 Kits choose MAILORDER PHONEORDER IN STORE ILLET 30137 CENTER am St LauudalmFa 19445 coast Oregon northward descends eastern faces Rocky Mountains Its appropriate name ultra-nice ultralight does explain peculiar lack awareness ultralights among us least two fine magazines filled full-color pictures reports projects just like other home-builders magical craft factory-produced kits flyaway planesthings like 50 mph lookalike Cub Citabria have images hang gliders grasshopper cuties open-air stuff wires struts over placeand immensely popularyouve missed boat Ive met first enclosed ultralight model flesh Im fascinated Kaluf blew red-and-white pusher lovely canopy big enough family goldfish Also Stoip Starlet buy locals word should law against anyone builds like spans 78 has 914 squares 40 two- four-strokes has OS four-stroke four channels Its Scale kit Canadian ultralight imported Germany means exquisite engineering requires patient assembly ingeniouslyfitted parts cut what seems like micrometer exactness Believe dont give tinkers damn about commercial plugs unvarnished reporting European plywood can different use whatever woods best suit purpose such limewood Plastics different strange-looking/smelling glues stick absolutely anything Enough photos deserve scrutiny Incidentally Bill Kaluf generally takes three months classic flying machines says complicatedlooking thing done six weeks half usual time wont take questions will forward letters Ships legend empathize fully peaks valleys starts off John Oldenkamp San Diego CA having growing up poor doing aeromodeling vacuum wait until 40th year witness True Flight ie Loss Airplane Through Thermal Activity acronym LOATTA have nothing against RC just have yet graduated finger control have Airtronics Monarch boards Project tonight John warms up tissuing 1937 Lanzo Combo Stick/Cabin jobfar too much time drawing up Zaic threeview bending hoops ribs teeny spars dog got up bench after housefly smushed whole tail Rebuilt recovered first red airplane Fourteen pieces paper wings beaut Two gigantic hand-carved freewheeling props 130 Model Aviation RON CHIDGEYS TIGER TAIL 4 ggg sq Sasic Kit 5118 Fihsqt.s Ps P. C vallatIs doss ml CABiN RIC PRODUCTS 112 IttaIs St Idaysts LA 71505 318 2327448 BYRON ORIGINALS E PCI lly. Practical Twin Ducted Fan Project Thousands satisfied modelers currently flying Byron Originals jets serve proof release kit can sure project can confidently build fly st dream designed built flown its designer few others new F-iS Eagle no exception F- 15 designed around proven Byro-Jet Propulsion System its twin Byro-Jet Fans turning nearly 20000 rpm producing 24 241/2 total pounds thrust Eagle delivers speed rate climb maneuver ability expect Byron Originals jet Unique Exclusive Components new F-i 5 far too numerous attempt describe magazine ad Detailed Info Pack includes brochure owners manual set reduced construction drawings kit pricing send $200 Get full story F-i 5 its long list exclusive features Custom Retractable Main Gear lutionary New Nose Gear Design matic Landing Gear Brake System Functional Pneumatic Speed Brake iled Fiberglass Fuselage Factory Installed Formers -in Wings Stabs Fins Precise Construction Methods Specifications wing Span 70channels 5 w/retracts Length 89 7 wls peed brake Ready-to-fly weight 28 lbs lending gear brakes Power - Twin Byro-Jet Performance Systems w/Rossi 81 orequiv Byron Originals Box 279lda Grove IA 51445 Ph 712 364-3165 also red Nice 2-in-dia wheels sanded out filled polished painted black Have set both up bench Since no admire mc share Pretty things Red always preferred yellow Until today Nearly ran out covering paper batch bought 15 years ago Now alcohol-shrink water Warps bad remember Forties nobody ever mentioned alterna tive beasts going get aerobap tism next Sunday over near Las Vegas OldTimer meet Oldenkamp goes VAMPS thing huge dry lake Reservations made Motorbike fueled up ready Have never Im certain will like rendition Lanzo huge vertical tall will blow minds isa pre-something ship defies modernity Looking prop specified judg ment great Chester Lanzo must have out mind quote 18 mill sol made up modest unit 16 high pitch will fly buggers like fly P-30s have sense will take photo graphs before sticking air maybe will rain blow will sit motel just plain talk am puzzled John says whet interest gravitate retrograde devices deep inside know squaretipped flat-bottomed mostly-sheet bird will run circles around what have just spent three weeks a-building eyes fingers hurt have shot up precious stash red tissue am fighting warps inch way Put nasty cut thumb carving props buck knife sucker will probably terminally tail heavy wind up will Mercury Seven Flight Phoenix Wright brothers over again Chester Lanzo hope nice guy four years old Lanzo launched prototype creations six Korda wowed guys back East did know Gas gasoline nor heard Maxwell Bassett interim aeromodeler hordes bridged too-young-to-know period now recognize Golden Age Modeling hoarded glue duringthe scarcity WW II days Balsa diverted military purposes flew paper airplanes out barn top did lot pretending fly airplanes whatever sort interest fueled world events As 12year-olds volunteered painfully scratch out identification models school thrilled whenever stray Selfridge Field P-47 passed over Oh elliptical planforms fat undercambered ribs hundreds hunks fuselage funky wheels bamboo bits Wonders Oldenkamp What wrong people design weird difficult gizmos Thank God now Hot Stuff good wood real razor blades T-pins Celotex building boards like None begins explain still build difficult old models John thinks case Half Korda all-sheet exercise Ed MA plan No 125 $1 75 led chase through Zaic yearbooks looking perfect most-beautiful model first disap pointment course instant discovery Old-Timers featured complex multi-curved outlines dumb fat proportions etc people nuts least current standards Cranks masochists build OldTimers right Ever made Korda Wakefield John asks What winners fly same straight up slight right spiral low dip glide off somewhere usually much need dether malizer Unnerving Spectacular cabin jobs accidents design insofar aerodynamics concerned probably masterpieces romance lore Zaic yearbooks usually listed longest flight achieved particular model fre quently somewhere between 12 42 minutes Powerful binoculars days strong legs maybe chased Model As got job done built flew crashed know did exist art form very much worth effort duplication discovery preservation things once done recreation miasma long since committed various libraries touching process creation however arcane immense delight am digging up past lam basically refaniiliarizing myself moments disappeared over hill far too quickly rush puberty manhood Long live Chet Lanzo Long live rubberband Red airplanes hope curse assumes some time passed before Oldenkamp added PS about flight experiences Rambled off 375 miles Henderson NV over weekend VAMPS Las Vegas Antique Model Airplane Society Annual Nice folks Vast site warm buoyant air hardpacked shiny dirt crust underfoot Magnifi cent mount scarps Stayed funky casino just three miles Hoover Dam sharing space noise Lake Mead drag boat crew WeirdContinued page 135 August 1986 131 F-l5EagI 1/7 Scale Exceptional Performance True Byro-Jet Style. iake-off distance paved runway less 250 feet little practice nose high landings predictable F-iS climbs authority good steady rate has solid positive groovy responsive feel Engine out performance outstanding ight trim changes enable hands-off straight level flight no need land until youre ready Plus Byron F-i 5 offers unlimited scale possibilities its priced com petitively other twin engine jets comparable size E E PERFORMANCE Step-By-Step Instructions lete Rolled Plans rate Machine Die Cut Balsa Spruce Plywood ce Spars Launch Strength TH HAND LAUNCH E HI-START H 59 Span 15 Oz 2 channel 370 Sq Area computer Modified E-193 Airfoil DAVEY Eh1SYSTEMS mwm CORPORATION ONE WOOD LANE MALVERN PA 19355 215 644-6772 Plane Talk/Winter Continued page 131 Lanzos fly Trembling nerves withstanding model got assembled photo graphed loaded modest amount rubber45 grams modem stuff Dry whole model weighed mere 100 grams 300 tenuous turns beast off its maiden voyage stally putted around sorta right kinda up came down near cars dented shiny red prop Darn shouldnt make trim change time appeared ship needed right down thrust plus some weight up front cure stall Added Y16 shim taped quarter nose second flight went up smoothiy same turnsgoing nowhere looking safe turns Risking packed 900 Fortunately lit DT fuse model shot off rapidly climbed throughout entire prop run hooked boomer soon become speck red looked great Itwas up about 7mm landed sight half-mile downwind retrieved foot san dals plopping along dry lake surface certainly thrilled gave toast C Lanzo now know built ancient heap understanding era investigate trace mind handiwork greats build some trust perhaps methods gain perspective probably little respect aeromodeling rootsnot within awareness until now Hope can find red tissue China connection Joe Tschirgi remember tailless Giant Stik May column paid dues retired English teacher Ninjing taken lightly book experts love argue such stuff offers correction make no arguments Just read Subject statement March 1986 issue MA concerning flying planks heavily reflexed airfoil makes stable Facts 1 Airfoil camberpositive reflex inverted zerohas nothing static stability 2 Youre certainly alone belief 9999% knowledgeable modelers surprising number full-scale aero en glneers would agree ie think reflex airfoils have stable center pressure travel Explanation 1 Static pitch stability aircraft rate change pitching moment angle attack 2 conventional air foilsthick thin cambered symmetric re flex inverted flathave constant aerody namic moments usable angle attack range 3 purpose reflex camber tailless configuration provide nose-up moment like angular difference tailed aircraft trims vehicle usable lift co efficient 4 NACA NASAs predecessor habit presenting airfoil Center Pressure defined moment divided lift led misunder standing stopped publishing meaning less confusing data conjunction airfoils over 50 years ago 5 center lift Aerodynamic center AC lift curve slope airfoil section parameters have significant influence static stability Both essentially fixed values AC 25% chord Ct/a0 1 per degree identical very few percent airfoils ie AC does move angle attack Repeat Does move Proof 1 Take old Free Flight wing junk pile Mount stick fuselage big fixed vertical fin aft wing 2 Mount big flat plate drag area about 2i chord lengths above wing Required area depends wing camber the 10% wing good starting point 3 Balance thing 15-18% MAC try hand glide Use usual trimming procedures remem ber drag area same thing angular difference the 4 Youll find thing glides stably inefficiently Obviously least drag area combined aft CG can get away will produce best glide Years ago eminent engineer presented lecture DCRC Club significant number odd configurations model glider form would work among glider suggested Tschirgi Van Hattum retired Holland used similar examples including Joes teaching July-August 1973 issue Junior Modeler Van Hattum published fasci nating article including nine radicals three-views picture achieved Joes result merely using tail vertical square stick projecting aft end fuselage Article title Gliders Nine Going sublime ridiculous heres teaser dihedral Theres diagram dard explanation dihedral works armY longerthan armX lift results Y side plane returned normal flight B 1 plane anhedral stable Yes Consider Evans Desperado quite stable full-scale examples So B2 arm Y shorter arm X Now correct can example B2 stable Shouldnt roll out control Continued page 136 .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74 3 Pak$495 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit5395 P0 Box68132 AIRCRAFT CO Portland OR 97268 Ready Fly$795 Add $3 postage handling first 2 packages 10 additional DGA Designs 0 D0A00 DC Designs 0 0 0 Cs0 0 j C o5 0 0 QuarterMaster 1SPORT BIPE S QUARTER SCALE PLANS Quarter Master Sport Bipe8 1f Guadra 35. 73Spafl.EZ build. Great Flyer.Semi-Ki AvaIlable..PPO 0 DAVIS D-1K sOaSpan. 0 Ouadra 35 power Similar. PPO CC 91933 KINNER SPORTSTER 5Modet K.117Span 035 power pPo5 5 _ oCs 4-CYCLE PROJECTS AKRON FUNK 15 Scale 54 Span deeCs 4 cycle. FantaStic FlyerPPoeI ________0 DAVIS D1K* 603 Spar. cycleorsirnilar..rP051D Two Inch wale Sieth scale _____________0 Cs 1933 KINNER SPORTSTER88 Cs Model K.75 Span. el-75.4cy PPO$ I110 Photo reduced try, Id Scale Plans oro Inch scale SIxth scale ________0 00A Plane0 cowing C PHOTO DOCUMENTATION PACKS available- 0 Scale Plans ALL PLANS ROLLEDSHIPPED UPS Conpleteelnstroctien Booklet Send sl00 Catalog O New York State Residents add 7% sales tao. Send check J o MO Os. Allow 3weoks tOr cflecktocleer Cs mU m] j [Ci st 1986 135 IfyoushouldthinkofslipflOtethatB3 what youd see wing RC pilot OK know better say matter relative wind acting upon dihedraled wings banked turn inside wing has greater angle attack outside stabilizes fun Does centrifugal force play part location CGthat high low pendulum effect What does presence centrifugal force banked turn know nothing Dont ask offer C old-fashioned turn-and-bank indicator instrnment tilted would leftbanked turn slip skid yaw equalized pilot coordination ball cen tered skid greater ball would move toward right side slip greater ball sinks toward left side plane itself can center ball what modelers call spirally stable piloting input required neutrally-stable moreacrobatic craft machine man together still center ball ball will center design has some deficiency difficult fly unflyable Whimsy flat-winged Stik close hands-off FF flat-winged Lacey Fike will fly OK Air three-dimensional often think terms two dimensionslike diagram Drop wing aileron pull upelevator model whips around know wing loadings go sky high high some times small heavy models youll snap out control plane pushing agalnst alr toward outside turn its angle attack affected holding upelevator wing perhaps nearer stall large part due centrifugal force free-to-pivot pendulum hung beneath belly would point wonders about Frank Zaics book Circu lar Airflow available AMA Supply & Service Section wondered about airflow phenomenawith turn-and-banked aircraftmany years ago Ive models would fly themselves around 360add bit nose weight becomes 720 vice-versa until cant hold 360 Such models seemingly can fine-tuned go neutrally stable banked circles yet flying hands-off neither recover ing nor degrading continuous-banked turns Argue leave out dont know nuttinunless name Tschirgi Planes wonderful things Perhaps ought wonder Bill Winter 4432 Altura Ct. Faitfax VA 22030 Radio Technique/Myers Continued page 41 redundant RF link Roland Spicer fascinating person talk pursued dream setting RC cross-country record great care intelligence describes event enthusiasm would credit much younger man can see Roland airplane description flight RC Video Magazine Volume 3 plane scale model Wallace Beerys Bellanca dedicated Rolands lifetime friend Allison Buck can seen hanglng ceiling AMA museum AMA Headquarters building Reston VA Ask Hurst Bowers tell about case havent noticed better times interference- reliability-wise rnshing down us George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Aid/Edberg Continued page 43 forklift required four RC channels launcher required two platform up/down launcher release decided use single transmitter con trol both gadgets same time wouldnt need juggle transmitters running experiment decided use trusty Futaba J Series system needed least six channels available Because two receivers would inside vacuum chamber made 1-in-thick solid steel walls felt using J Series quite reasonable transmitter shown behind forklift shots way radio signals get through receivers inside chamber through small Plexiglas window concerned two receivers same fre quency might interfere other both RC systems performed flawlessly through testing As far know first time model RC system has operated vacuum two receivers sub jected share electrical noise motors powered both forklift resetting mechanism launcher noise did affect operation receivers made big racket FM receiver used gather data telemetry system later found out several companies manufacture brushless DC motors supposed operate vacuum out generating electrical noise Next time Im using vacuum Ill give try Both forklift launcher pow ered sealed lead-acid D cells having 4 Ah capacity huge batteries known safe operate vacuum recharged after days testing constant-voltage charger case forklift extra weight lead-acid cells helped provide extra traction driving around foam rubber However often quite enough made snow tires pushing staples facing outward through tires cured traction problem launcher forklift arrangement worked extremely well After bit practice became proficient enough two oould have specimen back top launcher within 2 minutes may seem long time until consider specimen bounces ran domly foam-rubber-covered floor takes 90 seconds just recycle launcher case much less time 20 minutes needed recycle vacuum chamber wont go details results testing because really terest people field space craft dynamics will say results good enough Stanford award 136 Model Aviation Eke. Quality r S 937 x 156 x 175 18 oz 46 oz torque Years development have produced finest state-ofthe art receivers ever made Flight tests over country haveThe workhorse Ace servos Perfect Patternships Quarter Scale Boats Cars proven receiver will fly others fail Solid glitch-freeapplication high power required performance air plane attitude frequencies/channelsLIIIIIJ 14G20AAtlas Servo Kit$2395 Available Z7 50 53 72 75mHzAC 14G2OACAtlas Servo assembled$3146 12G70 Silver Seven Receiver Kit$3895 Available dealer order direct add $200 Ace RIC 116W 19th St Box SuB Higginsville MO 64037 816 584-721
Edition: Model Aviation - 1986/08
Page Numbers: 34, 35, 36, 37, 38, 130, 131, 135, 136
Bill Winter _____I3 EO 0 Plane Talk_______ OFF TO SEE THE WIZARD PA system blasted Light Horse Cavalry Overture Continentals 727 leaned its California leg out Denver hub West days Continental gimmick iron bird human terms Cross goal line leap hurdle lift bale Rotation music stopped Clapping hands cheers Seat belts prevented standing ovation Touch down Ontario came overture reach its wild climax magic carpet turned onto taxiway Encore Super ghostly 727 making music endlessly crisscrosses snowy peaks Jack Benny land Anaheim Azusa Cucamonga Watch step Cucamonga plane doesnt land Actually Rancho Cucamongaonly few miles Ontario Airport sitting patio February staring cardboard cutout mountalns 94 dry degrees shade enough whiten steers skull Incognito escape dead-stick mind Bill Evans found wizard wings 250 miles away Bishop fullsize sailpianers famed standing wave will loft 40000 ft beyond would budge although Dasher 40 crazy Des perado speeded-up modified Krackerjac tail Guys ribbed him much went fishing two weeks High Sierras Ill send friend Arrow pick up got foggy four days early morn beamed up patio announce will fly Gadzooks Fog now houses everywhere Guys thereeast south Los Angeles like strolling street players used work North Chicago family-style oases ends streets Three blocks away could fly Electric no fuss Ten minutes drive found nearly mile square flat field throughway far enough off safe Douglas plant distance paved highway fly off curbed lines car appearing distance about 20 min utes Small groups pairs trios kept arrivingmaking few flights departing join other similar groups Never saw club field hotshot pilotexcept Wizard Bill Evans Some dont see model magazines much else guess have ball hacker menagerie taught guy fly lickety split No knew either Evans Just two boys thought flying 60 Desperado mixed up version radar-timed police air show average roughiy 170 mph two runs upwind downwind long diving entries found critter has piped K&B 21 making similarly piped version K&Bs new plainbearing engine grudgingly agreeing bit span Trust keeps saying After view ing videotape 60 tape now AMA Museum AMA Executive Director John Worth muttered thing violates thing weve taught Dont think flying wing unstable stabilizer essential anhedral does workor technical articles diagram principle dihedral thing violated aerodynamic laws being immutable mind-set us have about everything familiar Seeing believing air ocean downwind turns and. some other time Youll remember 6-ft-plus Krackeijac itself modified early smaller threechannel ship 60s recent spoiler article Evans discussed 3141 airfoil evans Cranks up K&B piped 21 version Desperado prior Winters foray Star Wars found strange bird possess both neutrai go-where-you-point-it hands-off stabiiity no-taii detente know Evans kept Kracker jac after offering ship East whereas Winter has exact dupilcate Desperado lifting section two-thirds thickness above centerline provided l1 angular difference between wing/stab 20 dihedral skinned-foam wing tail OS 60 power Nice indeed got fly have Desperado mind has severe anhedral huge billboard vertical flying wings go like scat D unique stays pointed having flown found pussycat used high cruise also hands-off stable strange docile quick sport job bash around Sundays As easy fly conservative wingy cabin Krackeijac Desperado probably builds one-third time No orientation problems weirdly-configured wing until got too far out going away fog fringes suddenly looked like three-bladed prop Which two blades wings left two right two bottom two knew what next Since would sit handed transmitter Evans word Orientation 200 yards off no brave old pilots Space glorious space Psyched up back future Iknew Icould fly aerobatics Californiais Land Can Virginia Land Cant Back little flying site nice know am 20 years younger Aerobatics did high-jinks go 34 Modet Aviation After Bill Evans enticed Winter building Evans orange Krackerjac framed against genteel version Simitar flying wing snow-topped peaks Bishop ver old boy pound flesh Evans sion has balsa-skinned foam wing stab buiit new version Krackerjac a %l/ foil 1 1/2 decalage fiaperons stabilizer bitter pill swailowi Un- OS 60 Locals ribbed theflying-wing man expected fate brought two together badly go fishing two weeks some pisin fun flying under low thin fog mile square field just south LA Pleasure find Don Lefferts didnt have look very hard find Brown Teico CO-2-powered Mirage FF Plc shows blown-up version larger Herkimer CO-2 After WW ii engine mass production columns custodian sees good ies everywheresuch turbulator spars lines Fubars Ramrods San Diegans Left Whats different about Goldberg J-3 Cub its beautifuily built chocolate sprinkies thats ciuc Builder Dave Peitz isa member AMAs Sound Committe decided evaluate noiseless Scale model Hidden between cylinders its dummy twin Astro geared 40 whIch spins 13-8 Rev-Up 61/2 7 mm realistIc power flight Oh yes has soared Its all-up weight 91/i lb Right cowl removed removable ply box mount shows firewall extended forward Front plate 1/4-ln ply holed cooling Because motor has protruding brushes inserts rearhence bolt-on box Dave uses Teie-Tach measure rpm flight telemetry allowing precise prop comparisons Condor Hobbles device utilizes tiny transmit ter plane photocell pickup reads rpm through hole cowl Data transmitted hand-held meter ground Left inside story Three rows six 1 2V cells iSin Pack rests four1/s-in-sq pieces glued floor 3/4-in-sq across fuselage rear pack prevent sliding similartop crosspleces fitted under ply longerons hold-down Internal antenna attached strip runs aft strengthen gear accurate tracking wires attach ply fairings smail metal cable clamps Electric J-3 required downthrust considerable right Peltzs mods will added Goldberg plans Right asked what type four-stroke has Dave replies Wililams/Astro 40 aboutthe small exhaust pipes explains keep quiet heturns motor curious filp out Engine made fourWilliams Wright cylinder kits scrap balsa Tached 6250 rpm ground itturns 7250 air man named Gus mention Dr August Raspet discussion Al Backstrom MA April brought back flood memories Howell W Gwin Jr writes Beaumont TX went high school son David Starkville MS graduated Mississip pi State 1959 degree English remember Dr Raspet well about dozen us modelers Starkville profited Dr Raspets interest took same delight models did Richard Johnsons RJ-5 Although leading authorities boundary layer control always time talk airplanes us Id hate count number models constructed part scrap pile shop primarily interested Towline Gliders PAA Load inthose days Ihada Left Picture-perfect Schweizer John Hartafleld spans 6 ft weighs 4 lb has 600 sq area 20 OS four-stroke turns Graupner 1 031/a prop Locals wondered enough power pull John wonders will make stow plane ilke original Right Black pinstriping sets off modified plastic canopy emphasizes edges pretty orange-and-white color scheme Dummy cylinder gives authentic twin opposed look thats 0S side-mounted right Neatly painted pliot earphones scans realistic instruments August 1986 35 Left Winter lecturesthe Munchkln piioon iaiurs latest masterpiece 75-in Chinook Canadian uitraiightkita German import redand-white Scale museum piece model flies like trainer its 05 40 four-stroke pusher Right Removable canopy home helmeted pilot comes kit can look instrument pylon feet Metal tail boom struts some tough plastic plywood Left Covered painted trimmed reflections dancing polished surfaces Pilot seems have left hand tiller-type control slight pointed-down tilt thrust line Rudder pushrod external elevator rod appears hidden inside tall boom Right Precisely fitting ply pieces auto-align key mid-ship structure Including pylon takes two wing panels flush ala gliders Thermic 50X showing basics drag reduction helped get 301 glide ratio out designed propeller shroud Jasco Payloader Spitzy 045 vibrated too much lent us copies Frank Zaics yearbooks admitted freely learned great deal Zaic wasnt scholarly books about aerodynamics taught us about stability drag reduction Reynolds numbers knowing born teacher never lost enthusiasm sheer wonder flight dont think ever quite sure whether old solid wood Scientific Control Line models really airplanes always interested what did encouraged us build plastic models fly college swimming pool learn effect various control settings Gwin continues also streamlined clay get better glide performance almost drowned process Dr Raspet said could see airflow put potassium permanganate nose leading edges pool declared off-limits models very soon afterthatIwonder Dr Raspets Purple Plan loved soaring considering purest possible form flight used gliders research Some early activities involved chasing buzzards Sailplane movie camera Gus Raspets Buzzard Patrol well known Starkville still remember lovely calm morning flew over hangar about 300 feet up whistling theme High Mighty Thats decided Lhadto learn fly gliders heard father doubtful about safety airplane no engine took time talk him convince him gliding wasnt dangerous powered flight worked Dr Raspet Aeronautical Experiment Station time con sisted ramshackle Quonset hut blown wings mention often over 300 pinholes per square foot precise grid pattern got very tired pin vise dont remember Tailwind have very fond memories oper ating camera tuft-studies warsurplus flat-top Laister-Kauflnann gliders used research Dr Raspet founder Mississippi State Glider Club provided single-place Schweizer 1-19 glider learned fly glider being towed down runway just below flying speed bodyless 1938 Ford instructor inthe tow car signaled pilot way move stick rudder pedals until became automatic As became expert speed increased until left ground proficiencyand grad uated 100-ft rope 900 turns final step education 500-ft rope gave us enough altitude fly landing pattern point took ourflrst dual instruction Starkville EBO Mason Sumter Pappy Camp flight instructor Charles Lindbergh Dr Raspet lent club Olympia sailplane condition restore ourselves would often stop shop late night either help us just sit drink coffee tell stories Lord did have stories Most us agreed wed rather have Dr Raspet talk peel off old fabric rebuild ribs Ive rambled far too long about guess should stop Howell thinks bot tom line Dr Raspet finest human beings Ive ever met will always special because warmth interest other plane-struck people ages hate presumptuous think Dr Raspet would like being remembered just much tremendous contributions world aerodynamics telling Gwin used word last paragraph may have known him can remember Gus Raspet Fiddler roofTradition Tradition Don Lefferts tapped knee little rubber hammer leg jumped Its gray Mondays inspired go fly circlingbuzzards Lefferts vintage auto restoration otTheat escape models Im mood see going Ive charglng cycling listening sad stories told battery packs just got back Nats Don leads off flew own-design C02 called Image Its sort compilation Old-Timer FF designs stretched pulled shape use Brown Telco-size motors Ive loaned out plans several flying Wouldnt know friend built flies better ship photos large Imageblown up use old Herkimer OK COz motor Bill Browns tanks Au Yes created worlds 36 Model Aviation Left John Oldenkamp San Diego two Lanzo props 18-in version nose 16-in version foreground Smailer proved better performer two Right Stick cabin versions Lanzo combo Text has Oldenkamps OT thoughts famous engine Brown Jr shows great promise also took FF Old-Tinier called Tlush Mite Don goes trying trim Imanaged one-bounce landingintothe side perfectly-restored 1957 Chevrolet parked line 50 ordinary cars belonging ordinary mortals beautifully-finished car belongs Sal Taibi Sal gracious gruff made feel like little kid Fooey Ed Restored isnt quite correct word Sals old car Maintained would better Sal original owner has driven continu ously since car new Fooey no doubt way vintage car guy would feel about himself clobbering Sals classic massive C02 Sal always gracious seemingly gruff Don flown i-scale Laser car would have seen gruff Jd bet Mr Tradition Taibi inter ested rendition ye olde pylon FF An Ebling Phoenix-like fuselageflat bottom sweeping curved top Surfaces remi niscent Fubars Ranirods San Diegans ancient thick undercambered alr foil prior 1950 foiks like Pete Andrews John Zalc Frank Ehling went climb then-thin lO-percenters knife-sharp lead ing edges Stab tilted RCers No cockeyed up right glides right tricky skinny pylonextending down fuselage bottom Does lean typical right power turn turbulator spar top bottom mains another aft bottom spar Golden Age polyhedral pop-up tail fuse de thermalizer Sal gonna park antique near crazy Free Flighters youll need gruff act havent made twisting climbers slow-motion glides since early SOs RC means no chasing early SOs RC planes usually crashed flew away made chas ing ridiculous Ive notions FF unlike Lefferts fun critter old Fire cracker MAN Pasture flights evening swarms barn swallows harassing its silent circles see now 035 electric motor five 500 mAh cells would need bit biggerjust rudder control retrieval shutoff maybe prevent seeding clouds Can get away Bob Kopski thing fascinates about Dave Peltzs not-too-modified Golderg J-3 Cub Electric power something might expect ingenious Sailplaner mastery computers knows geared Astro 40 cobalt 18 cells 12 Ah capacity turns its Rev-Up 13-8 prop precisely 7250 rpm horizontal flight 6250 ground Missouri Well son guy meas ures in-flight rpm via telemetry Condor Hobbies Tele-Tach consists tiny transmitter mounted plane tiny photocell pickup taped motor facing forward sees prop turning through bottom hole cowl Data rpm trans mitted handheld meter know this 1000 ground/air rpm dif Continued page 22 Y BI t x B2 -A-~1~ Y *1 B3 C Winters brain teaser month Figure standard expianation dihedral works B2 figure seems suggest anhedrai wouid unstable People like Evans have proved though case See text discussion August1986 37 Digital LCD tachometer has dual scale lox-i oox stable RPM readout Full scale voltmeter can used check/cycle TXIRX battery combos Reads load up 20 voltsand DC ammeter used check servo current Will find worn binding stalled servo conditions w/SCA1 Battery included 90 day warranty 4 Function ACCU-TACH $8995 ACCESSORIES OSAl -Quarter Scale Adapter ATi & AT2-500ma load.995 SCAl -Servo Current Adapter Airtronics Futaba Kraft 995 TLB1-Voltage Probes.295 CC1-Carrying Case will hold ACCU-TACH accessories. 1295 Send check MO NorCal Avionics A-B Tech Inc 5689 Glasgow Troy MI 48098 313 828-8210 MI add 4% tax Add $3 S&H See dealer first ATT- CHEKi ON-Board Battery Tester Saves Time. Saves Models BAiTCHEK RX-1 ein 5 usA Special Month 3/32x4x36 C Price good until Aug 1 1986 Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Protune corp 914 4626452 PO Box 1808 Poughkeepsie NY 12601 AMA CLUBS Ask about AMA Club Discounts minimum orders $10000 12020 Cent ralia Hawaiian Gardens CA 90716 213 865-3220 ference roughly one-sixth what wed tack ground takes guesswork out propunloading daily lotto game quite edge Dave accurately comparing props right now date finds Rev-Up better others tested farprobably due its thinner airfoil thinks As will see pictures J-3 nifty often stared bouncing gas indicator front windshield fullsize Cubso depressing short cross-country hops against wind cars would pass Using servo-actuated switch Daves J-3 gets 6 7 mm motor run has thermaled now Astro controller throt tle probably giving him 10- 1 1-mm run plus whatever glide time can get Climb realisticwhich what wish match type have sense scalelike flying 13-8 7000 has surprising brute pull hefty torque Peltz cautions everyone Electrics prop hitting dainty hand wont stop like glow engine therefore have arming switch Thats gospel Carl Goldberg Electric run wild adjoining room 3 am gets out bed no arming switch forgot turn off receiver weve done airborne pack faded dutifully turned on/off switch did hear guy Giant Scaie gassie started its Quadra way night didnt Pelts found electrified Cub required additional downthrust significantly right thrust gross 9 lb handled easily gear beefed up ensure accurate tracking ground handling tail wheel wire bent ard decrease ground-stance anglewhich also improves ground handling true tail-draggers Taking Tony Nacca ratos advice hes master big-scale Elec tics Dave twisted out both tips starting about two-thirds semispaninsurance happen slow up too much higher wing loadings Dave built J-3 because AMA Sound Committee As Sailplane man knows about silence does seem relate subject J-3 valid tool among others unpleasant war keep flying sites Dave gets asked about tiny stacks scalelike dummy engine big enough show easily runs turns switch find average Joe has never seen Electric Such guys dont believe thrust permitted hold J-3 Too heavy fly say Eating-crows getting scarce Daves summary noise prob lems facing future think Electric flying has grow popularity present weakness still batteries heavy energy limiting However expect well see some improvement area next few years will short time Electrics performance has doubled due better motors improved battery technology Incidentally Carl Goldberg Models expec ted add considerable Electric information kit plan because Pelts findings John Hartsflelds Schweizer tow plane speaks have published pictures series experimental RC low-wingers big its power pleasing perform ance K&B/Veco 19 spans 6 8 ft time got plan requests Hands-off soaring main objective three channels couldnt quite get combinationthough know now should have enough dihedral put tips line lower edge cockpit Continued page 130 38 Model Aviation NEW Balsa Spruce Plywood Mon Fri Kit Mfg match current prices 8am -4pm now paying better quality PST Open Public 40-60% Discounts BE PART OF AVIATIONS ANNUAL REUNION.. INVITATION TO YOU can help assure com memoration historic achievement continues opportunity par ticipate important ceremonies Societys other programs made available people young old As member will receive Societys quarterly newsletter FL YER will invited member tend participate December 17 ceremonies Memorial First Flight Luncheon unveiling honoree First Flight Shrine As member will have unique role helping assure pur poses Society met important work First Flight Shrine continues recognize honor have accomplished significant firsts aviation people might enjoy membership Society participation its programs informed opportunity PU RPOSES First Flight Society non profit memorial educational torical organization incorporated State North Carolina Its history traces 1926 Societys objectives organize conduct sponsor cosponsor promote otherwise cause appropriate ceremonies events held annually anniversary site elsewhere commemorating first powered flight Wright Brothers achievements contributions development flight encourage invite promote visits historic site people near far may see first hand birthplace powered flight foster promote public awareness widespread interest origin history future ffight its forms FIRST FLIGHT SOCIETY PO Box 1903 Kitty Hawk NC 27949 N AM P STREET CITY STATE __________ZIP Member $20 Business$l 50 National Corporation$5 00 Dues Contributions tax deductible Sorta Pitts/Shepherd Continued page 127 especially model gets air smoker really putting out roses first though took quite few flights get trimmed out model will little different keep mind arrangement shown starting point getting model adjusted fly way want have built flown monoplanes past remember different ball game wont handle same monoplane Have fun Plane Talk/Winter Continued page 38 like Rubber Scale jobs procrastinated doing redesign would have such dihedral nicely-tapered wing still tail-dragger almost spitting image Hartsfields ship romantic open cockpit Hartsfields plane answer anyone wants such aircraft However modest dihedral suggests fourchannel controls grand sport airplane plans MAN published Specs reported John span 6 ft area 600 sq weight 4 lb power OS 20F5 four-stroke prop Graupner l0-3i locals believe engine should pull okay will will beautiful John made dummy cylinder opposed twin look hard tell right-side cylinder working two-wheel gear simple sturdy scalelike cowl removes readily Location vertical tail allows simple one-piece elevator top deck suggests fulllength straight line fuselage dont know canopy stock modified home-brew unless want exact scale could almost anything canopy/open cockpit motif orange-and-white scheme accentuates long graceful wings ship proud Dont worry about climb power eight-footer climbed better six-footer flying wing will get high could possibly wish stab big enough keep bird step warm day supposes could maintain cruise fast idle wont airplane dummy pilot Chlnoolc warm moist southwest wind SP5 St 8I S Iie BENTOM BHOWN JH CAMIjilLL COMET- COVERITE DUBRO EAsv BUILT MODELS ENYA FAt FLYLINE Fox GOLDBERG- GOLDEN AGE REPRO IGENE DUBOIS- GUILLOW- K&B- K&S L R AX PACTRA- PECK-POLYMER PERFECT RN MODELS SEAGLEN SIG STERLING SULLIVAN SUPER TIGRE TAFFINDER TELCO- TOP FLITE WILLIAMS & OTHERS IESTES MODEL ROCKETS Send $100 Cash Check cc Stamps fop osac 44 page tabloid sise DISCOUNT Catalog 900 itlustraionsover 700 Kits choose MAILORDER PHONEORDER IN STORE ILLET 30137 CENTER am St LauudalmFa 19445 coast Oregon northward descends eastern faces Rocky Mountains Its appropriate name ultra-nice ultralight does explain peculiar lack awareness ultralights among us least two fine magazines filled full-color pictures reports projects just like other home-builders magical craft factory-produced kits flyaway planesthings like 50 mph lookalike Cub Citabria have images hang gliders grasshopper cuties open-air stuff wires struts over placeand immensely popularyouve missed boat Ive met first enclosed ultralight model flesh Im fascinated Kaluf blew red-and-white pusher lovely canopy big enough family goldfish Also Stoip Starlet buy locals word should law against anyone builds like spans 78 has 914 squares 40 two- four-strokes has OS four-stroke four channels Its Scale kit Canadian ultralight imported Germany means exquisite engineering requires patient assembly ingeniouslyfitted parts cut what seems like micrometer exactness Believe dont give tinkers damn about commercial plugs unvarnished reporting European plywood can different use whatever woods best suit purpose such limewood Plastics different strange-looking/smelling glues stick absolutely anything Enough photos deserve scrutiny Incidentally Bill Kaluf generally takes three months classic flying machines says complicatedlooking thing done six weeks half usual time wont take questions will forward letters Ships legend empathize fully peaks valleys starts off John Oldenkamp San Diego CA having growing up poor doing aeromodeling vacuum wait until 40th year witness True Flight ie Loss Airplane Through Thermal Activity acronym LOATTA have nothing against RC just have yet graduated finger control have Airtronics Monarch boards Project tonight John warms up tissuing 1937 Lanzo Combo Stick/Cabin jobfar too much time drawing up Zaic threeview bending hoops ribs teeny spars dog got up bench after housefly smushed whole tail Rebuilt recovered first red airplane Fourteen pieces paper wings beaut Two gigantic hand-carved freewheeling props 130 Model Aviation RON CHIDGEYS TIGER TAIL 4 ggg sq Sasic Kit 5118 Fihsqt.s Ps P. C vallatIs doss ml CABiN RIC PRODUCTS 112 IttaIs St Idaysts LA 71505 318 2327448 BYRON ORIGINALS E PCI lly. Practical Twin Ducted Fan Project Thousands satisfied modelers currently flying Byron Originals jets serve proof release kit can sure project can confidently build fly st dream designed built flown its designer few others new F-iS Eagle no exception F- 15 designed around proven Byro-Jet Propulsion System its twin Byro-Jet Fans turning nearly 20000 rpm producing 24 241/2 total pounds thrust Eagle delivers speed rate climb maneuver ability expect Byron Originals jet Unique Exclusive Components new F-i 5 far too numerous attempt describe magazine ad Detailed Info Pack includes brochure owners manual set reduced construction drawings kit pricing send $200 Get full story F-i 5 its long list exclusive features Custom Retractable Main Gear lutionary New Nose Gear Design matic Landing Gear Brake System Functional Pneumatic Speed Brake iled Fiberglass Fuselage Factory Installed Formers -in Wings Stabs Fins Precise Construction Methods Specifications wing Span 70channels 5 w/retracts Length 89 7 wls peed brake Ready-to-fly weight 28 lbs lending gear brakes Power - Twin Byro-Jet Performance Systems w/Rossi 81 orequiv Byron Originals Box 279lda Grove IA 51445 Ph 712 364-3165 also red Nice 2-in-dia wheels sanded out filled polished painted black Have set both up bench Since no admire mc share Pretty things Red always preferred yellow Until today Nearly ran out covering paper batch bought 15 years ago Now alcohol-shrink water Warps bad remember Forties nobody ever mentioned alterna tive beasts going get aerobap tism next Sunday over near Las Vegas OldTimer meet Oldenkamp goes VAMPS thing huge dry lake Reservations made Motorbike fueled up ready Have never Im certain will like rendition Lanzo huge vertical tall will blow minds isa pre-something ship defies modernity Looking prop specified judg ment great Chester Lanzo must have out mind quote 18 mill sol made up modest unit 16 high pitch will fly buggers like fly P-30s have sense will take photo graphs before sticking air maybe will rain blow will sit motel just plain talk am puzzled John says whet interest gravitate retrograde devices deep inside know squaretipped flat-bottomed mostly-sheet bird will run circles around what have just spent three weeks a-building eyes fingers hurt have shot up precious stash red tissue am fighting warps inch way Put nasty cut thumb carving props buck knife sucker will probably terminally tail heavy wind up will Mercury Seven Flight Phoenix Wright brothers over again Chester Lanzo hope nice guy four years old Lanzo launched prototype creations six Korda wowed guys back East did know Gas gasoline nor heard Maxwell Bassett interim aeromodeler hordes bridged too-young-to-know period now recognize Golden Age Modeling hoarded glue duringthe scarcity WW II days Balsa diverted military purposes flew paper airplanes out barn top did lot pretending fly airplanes whatever sort interest fueled world events As 12year-olds volunteered painfully scratch out identification models school thrilled whenever stray Selfridge Field P-47 passed over Oh elliptical planforms fat undercambered ribs hundreds hunks fuselage funky wheels bamboo bits Wonders Oldenkamp What wrong people design weird difficult gizmos Thank God now Hot Stuff good wood real razor blades T-pins Celotex building boards like None begins explain still build difficult old models John thinks case Half Korda all-sheet exercise Ed MA plan No 125 $1 75 led chase through Zaic yearbooks looking perfect most-beautiful model first disap pointment course instant discovery Old-Timers featured complex multi-curved outlines dumb fat proportions etc people nuts least current standards Cranks masochists build OldTimers right Ever made Korda Wakefield John asks What winners fly same straight up slight right spiral low dip glide off somewhere usually much need dether malizer Unnerving Spectacular cabin jobs accidents design insofar aerodynamics concerned probably masterpieces romance lore Zaic yearbooks usually listed longest flight achieved particular model fre quently somewhere between 12 42 minutes Powerful binoculars days strong legs maybe chased Model As got job done built flew crashed know did exist art form very much worth effort duplication discovery preservation things once done recreation miasma long since committed various libraries touching process creation however arcane immense delight am digging up past lam basically refaniiliarizing myself moments disappeared over hill far too quickly rush puberty manhood Long live Chet Lanzo Long live rubberband Red airplanes hope curse assumes some time passed before Oldenkamp added PS about flight experiences Rambled off 375 miles Henderson NV over weekend VAMPS Las Vegas Antique Model Airplane Society Annual Nice folks Vast site warm buoyant air hardpacked shiny dirt crust underfoot Magnifi cent mount scarps Stayed funky casino just three miles Hoover Dam sharing space noise Lake Mead drag boat crew WeirdContinued page 135 August 1986 131 F-l5EagI 1/7 Scale Exceptional Performance True Byro-Jet Style. iake-off distance paved runway less 250 feet little practice nose high landings predictable F-iS climbs authority good steady rate has solid positive groovy responsive feel Engine out performance outstanding ight trim changes enable hands-off straight level flight no need land until youre ready Plus Byron F-i 5 offers unlimited scale possibilities its priced com petitively other twin engine jets comparable size E E PERFORMANCE Step-By-Step Instructions lete Rolled Plans rate Machine Die Cut Balsa Spruce Plywood ce Spars Launch Strength TH HAND LAUNCH E HI-START H 59 Span 15 Oz 2 channel 370 Sq Area computer Modified E-193 Airfoil DAVEY Eh1SYSTEMS mwm CORPORATION ONE WOOD LANE MALVERN PA 19355 215 644-6772 Plane Talk/Winter Continued page 131 Lanzos fly Trembling nerves withstanding model got assembled photo graphed loaded modest amount rubber45 grams modem stuff Dry whole model weighed mere 100 grams 300 tenuous turns beast off its maiden voyage stally putted around sorta right kinda up came down near cars dented shiny red prop Darn shouldnt make trim change time appeared ship needed right down thrust plus some weight up front cure stall Added Y16 shim taped quarter nose second flight went up smoothiy same turnsgoing nowhere looking safe turns Risking packed 900 Fortunately lit DT fuse model shot off rapidly climbed throughout entire prop run hooked boomer soon become speck red looked great Itwas up about 7mm landed sight half-mile downwind retrieved foot san dals plopping along dry lake surface certainly thrilled gave toast C Lanzo now know built ancient heap understanding era investigate trace mind handiwork greats build some trust perhaps methods gain perspective probably little respect aeromodeling rootsnot within awareness until now Hope can find red tissue China connection Joe Tschirgi remember tailless Giant Stik May column paid dues retired English teacher Ninjing taken lightly book experts love argue such stuff offers correction make no arguments Just read Subject statement March 1986 issue MA concerning flying planks heavily reflexed airfoil makes stable Facts 1 Airfoil camberpositive reflex inverted zerohas nothing static stability 2 Youre certainly alone belief 9999% knowledgeable modelers surprising number full-scale aero en glneers would agree ie think reflex airfoils have stable center pressure travel Explanation 1 Static pitch stability aircraft rate change pitching moment angle attack 2 conventional air foilsthick thin cambered symmetric re flex inverted flathave constant aerody namic moments usable angle attack range 3 purpose reflex camber tailless configuration provide nose-up moment like angular difference tailed aircraft trims vehicle usable lift co efficient 4 NACA NASAs predecessor habit presenting airfoil Center Pressure defined moment divided lift led misunder standing stopped publishing meaning less confusing data conjunction airfoils over 50 years ago 5 center lift Aerodynamic center AC lift curve slope airfoil section parameters have significant influence static stability Both essentially fixed values AC 25% chord Ct/a0 1 per degree identical very few percent airfoils ie AC does move angle attack Repeat Does move Proof 1 Take old Free Flight wing junk pile Mount stick fuselage big fixed vertical fin aft wing 2 Mount big flat plate drag area about 2i chord lengths above wing Required area depends wing camber the 10% wing good starting point 3 Balance thing 15-18% MAC try hand glide Use usual trimming procedures remem ber drag area same thing angular difference the 4 Youll find thing glides stably inefficiently Obviously least drag area combined aft CG can get away will produce best glide Years ago eminent engineer presented lecture DCRC Club significant number odd configurations model glider form would work among glider suggested Tschirgi Van Hattum retired Holland used similar examples including Joes teaching July-August 1973 issue Junior Modeler Van Hattum published fasci nating article including nine radicals three-views picture achieved Joes result merely using tail vertical square stick projecting aft end fuselage Article title Gliders Nine Going sublime ridiculous heres teaser dihedral Theres diagram dard explanation dihedral works armY longerthan armX lift results Y side plane returned normal flight B 1 plane anhedral stable Yes Consider Evans Desperado quite stable full-scale examples So B2 arm Y shorter arm X Now correct can example B2 stable Shouldnt roll out control Continued page 136 .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74 3 Pak$495 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit5395 P0 Box68132 AIRCRAFT CO Portland OR 97268 Ready Fly$795 Add $3 postage handling first 2 packages 10 additional DGA Designs 0 D0A00 DC Designs 0 0 0 Cs0 0 j C o5 0 0 QuarterMaster 1SPORT BIPE S QUARTER SCALE PLANS Quarter Master Sport Bipe8 1f Guadra 35. 73Spafl.EZ build. Great Flyer.Semi-Ki AvaIlable..PPO 0 DAVIS D-1K sOaSpan. 0 Ouadra 35 power Similar. PPO CC 91933 KINNER SPORTSTER 5Modet K.117Span 035 power pPo5 5 _ oCs 4-CYCLE PROJECTS AKRON FUNK 15 Scale 54 Span deeCs 4 cycle. FantaStic FlyerPPoeI ________0 DAVIS D1K* 603 Spar. cycleorsirnilar..rP051D Two Inch wale Sieth scale _____________0 Cs 1933 KINNER SPORTSTER88 Cs Model K.75 Span. el-75.4cy PPO$ I110 Photo reduced try, Id Scale Plans oro Inch scale SIxth scale ________0 00A Plane0 cowing C PHOTO DOCUMENTATION PACKS available- 0 Scale Plans ALL PLANS ROLLEDSHIPPED UPS Conpleteelnstroctien Booklet Send sl00 Catalog O New York State Residents add 7% sales tao. Send check J o MO Os. Allow 3weoks tOr cflecktocleer Cs mU m] j [Ci st 1986 135 IfyoushouldthinkofslipflOtethatB3 what youd see wing RC pilot OK know better say matter relative wind acting upon dihedraled wings banked turn inside wing has greater angle attack outside stabilizes fun Does centrifugal force play part location CGthat high low pendulum effect What does presence centrifugal force banked turn know nothing Dont ask offer C old-fashioned turn-and-bank indicator instrnment tilted would leftbanked turn slip skid yaw equalized pilot coordination ball cen tered skid greater ball would move toward right side slip greater ball sinks toward left side plane itself can center ball what modelers call spirally stable piloting input required neutrally-stable moreacrobatic craft machine man together still center ball ball will center design has some deficiency difficult fly unflyable Whimsy flat-winged Stik close hands-off FF flat-winged Lacey Fike will fly OK Air three-dimensional often think terms two dimensionslike diagram Drop wing aileron pull upelevator model whips around know wing loadings go sky high high some times small heavy models youll snap out control plane pushing agalnst alr toward outside turn its angle attack affected holding upelevator wing perhaps nearer stall large part due centrifugal force free-to-pivot pendulum hung beneath belly would point wonders about Frank Zaics book Circu lar Airflow available AMA Supply & Service Section wondered about airflow phenomenawith turn-and-banked aircraftmany years ago Ive models would fly themselves around 360add bit nose weight becomes 720 vice-versa until cant hold 360 Such models seemingly can fine-tuned go neutrally stable banked circles yet flying hands-off neither recover ing nor degrading continuous-banked turns Argue leave out dont know nuttinunless name Tschirgi Planes wonderful things Perhaps ought wonder Bill Winter 4432 Altura Ct. Faitfax VA 22030 Radio Technique/Myers Continued page 41 redundant RF link Roland Spicer fascinating person talk pursued dream setting RC cross-country record great care intelligence describes event enthusiasm would credit much younger man can see Roland airplane description flight RC Video Magazine Volume 3 plane scale model Wallace Beerys Bellanca dedicated Rolands lifetime friend Allison Buck can seen hanglng ceiling AMA museum AMA Headquarters building Reston VA Ask Hurst Bowers tell about case havent noticed better times interference- reliability-wise rnshing down us George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Aid/Edberg Continued page 43 forklift required four RC channels launcher required two platform up/down launcher release decided use single transmitter con trol both gadgets same time wouldnt need juggle transmitters running experiment decided use trusty Futaba J Series system needed least six channels available Because two receivers would inside vacuum chamber made 1-in-thick solid steel walls felt using J Series quite reasonable transmitter shown behind forklift shots way radio signals get through receivers inside chamber through small Plexiglas window concerned two receivers same fre quency might interfere other both RC systems performed flawlessly through testing As far know first time model RC system has operated vacuum two receivers sub jected share electrical noise motors powered both forklift resetting mechanism launcher noise did affect operation receivers made big racket FM receiver used gather data telemetry system later found out several companies manufacture brushless DC motors supposed operate vacuum out generating electrical noise Next time Im using vacuum Ill give try Both forklift launcher pow ered sealed lead-acid D cells having 4 Ah capacity huge batteries known safe operate vacuum recharged after days testing constant-voltage charger case forklift extra weight lead-acid cells helped provide extra traction driving around foam rubber However often quite enough made snow tires pushing staples facing outward through tires cured traction problem launcher forklift arrangement worked extremely well After bit practice became proficient enough two oould have specimen back top launcher within 2 minutes may seem long time until consider specimen bounces ran domly foam-rubber-covered floor takes 90 seconds just recycle launcher case much less time 20 minutes needed recycle vacuum chamber wont go details results testing because really terest people field space craft dynamics will say results good enough Stanford award 136 Model Aviation Eke. Quality r S 937 x 156 x 175 18 oz 46 oz torque Years development have produced finest state-ofthe art receivers ever made Flight tests over country haveThe workhorse Ace servos Perfect Patternships Quarter Scale Boats Cars proven receiver will fly others fail Solid glitch-freeapplication high power required performance air plane attitude frequencies/channelsLIIIIIJ 14G20AAtlas Servo Kit$2395 Available Z7 50 53 72 75mHzAC 14G2OACAtlas Servo assembled$3146 12G70 Silver Seven Receiver Kit$3895 Available dealer order direct add $200 Ace RIC 116W 19th St Box SuB Higginsville MO 64037 816 584-721
Edition: Model Aviation - 1986/08
Page Numbers: 34, 35, 36, 37, 38, 130, 131, 135, 136
Bill Winter _____I3 EO 0 Plane Talk_______ OFF TO SEE THE WIZARD PA system blasted Light Horse Cavalry Overture Continentals 727 leaned its California leg out Denver hub West days Continental gimmick iron bird human terms Cross goal line leap hurdle lift bale Rotation music stopped Clapping hands cheers Seat belts prevented standing ovation Touch down Ontario came overture reach its wild climax magic carpet turned onto taxiway Encore Super ghostly 727 making music endlessly crisscrosses snowy peaks Jack Benny land Anaheim Azusa Cucamonga Watch step Cucamonga plane doesnt land Actually Rancho Cucamongaonly few miles Ontario Airport sitting patio February staring cardboard cutout mountalns 94 dry degrees shade enough whiten steers skull Incognito escape dead-stick mind Bill Evans found wizard wings 250 miles away Bishop fullsize sailpianers famed standing wave will loft 40000 ft beyond would budge although Dasher 40 crazy Des perado speeded-up modified Krackerjac tail Guys ribbed him much went fishing two weeks High Sierras Ill send friend Arrow pick up got foggy four days early morn beamed up patio announce will fly Gadzooks Fog now houses everywhere Guys thereeast south Los Angeles like strolling street players used work North Chicago family-style oases ends streets Three blocks away could fly Electric no fuss Ten minutes drive found nearly mile square flat field throughway far enough off safe Douglas plant distance paved highway fly off curbed lines car appearing distance about 20 min utes Small groups pairs trios kept arrivingmaking few flights departing join other similar groups Never saw club field hotshot pilotexcept Wizard Bill Evans Some dont see model magazines much else guess have ball hacker menagerie taught guy fly lickety split No knew either Evans Just two boys thought flying 60 Desperado mixed up version radar-timed police air show average roughiy 170 mph two runs upwind downwind long diving entries found critter has piped K&B 21 making similarly piped version K&Bs new plainbearing engine grudgingly agreeing bit span Trust keeps saying After view ing videotape 60 tape now AMA Museum AMA Executive Director John Worth muttered thing violates thing weve taught Dont think flying wing unstable stabilizer essential anhedral does workor technical articles diagram principle dihedral thing violated aerodynamic laws being immutable mind-set us have about everything familiar Seeing believing air ocean downwind turns and. some other time Youll remember 6-ft-plus Krackeijac itself modified early smaller threechannel ship 60s recent spoiler article Evans discussed 3141 airfoil evans Cranks up K&B piped 21 version Desperado prior Winters foray Star Wars found strange bird possess both neutrai go-where-you-point-it hands-off stabiiity no-taii detente know Evans kept Kracker jac after offering ship East whereas Winter has exact dupilcate Desperado lifting section two-thirds thickness above centerline provided l1 angular difference between wing/stab 20 dihedral skinned-foam wing tail OS 60 power Nice indeed got fly have Desperado mind has severe anhedral huge billboard vertical flying wings go like scat D unique stays pointed having flown found pussycat used high cruise also hands-off stable strange docile quick sport job bash around Sundays As easy fly conservative wingy cabin Krackeijac Desperado probably builds one-third time No orientation problems weirdly-configured wing until got too far out going away fog fringes suddenly looked like three-bladed prop Which two blades wings left two right two bottom two knew what next Since would sit handed transmitter Evans word Orientation 200 yards off no brave old pilots Space glorious space Psyched up back future Iknew Icould fly aerobatics Californiais Land Can Virginia Land Cant Back little flying site nice know am 20 years younger Aerobatics did high-jinks go 34 Modet Aviation After Bill Evans enticed Winter building Evans orange Krackerjac framed against genteel version Simitar flying wing snow-topped peaks Bishop ver old boy pound flesh Evans sion has balsa-skinned foam wing stab buiit new version Krackerjac a %l/ foil 1 1/2 decalage fiaperons stabilizer bitter pill swailowi Un- OS 60 Locals ribbed theflying-wing man expected fate brought two together badly go fishing two weeks some pisin fun flying under low thin fog mile square field just south LA Pleasure find Don Lefferts didnt have look very hard find Brown Teico CO-2-powered Mirage FF Plc shows blown-up version larger Herkimer CO-2 After WW ii engine mass production columns custodian sees good ies everywheresuch turbulator spars lines Fubars Ramrods San Diegans Left Whats different about Goldberg J-3 Cub its beautifuily built chocolate sprinkies thats ciuc Builder Dave Peitz isa member AMAs Sound Committe decided evaluate noiseless Scale model Hidden between cylinders its dummy twin Astro geared 40 whIch spins 13-8 Rev-Up 61/2 7 mm realistIc power flight Oh yes has soared Its all-up weight 91/i lb Right cowl removed removable ply box mount shows firewall extended forward Front plate 1/4-ln ply holed cooling Because motor has protruding brushes inserts rearhence bolt-on box Dave uses Teie-Tach measure rpm flight telemetry allowing precise prop comparisons Condor Hobbles device utilizes tiny transmit ter plane photocell pickup reads rpm through hole cowl Data transmitted hand-held meter ground Left inside story Three rows six 1 2V cells iSin Pack rests four1/s-in-sq pieces glued floor 3/4-in-sq across fuselage rear pack prevent sliding similartop crosspleces fitted under ply longerons hold-down Internal antenna attached strip runs aft strengthen gear accurate tracking wires attach ply fairings smail metal cable clamps Electric J-3 required downthrust considerable right Peltzs mods will added Goldberg plans Right asked what type four-stroke has Dave replies Wililams/Astro 40 aboutthe small exhaust pipes explains keep quiet heturns motor curious filp out Engine made fourWilliams Wright cylinder kits scrap balsa Tached 6250 rpm ground itturns 7250 air man named Gus mention Dr August Raspet discussion Al Backstrom MA April brought back flood memories Howell W Gwin Jr writes Beaumont TX went high school son David Starkville MS graduated Mississip pi State 1959 degree English remember Dr Raspet well about dozen us modelers Starkville profited Dr Raspets interest took same delight models did Richard Johnsons RJ-5 Although leading authorities boundary layer control always time talk airplanes us Id hate count number models constructed part scrap pile shop primarily interested Towline Gliders PAA Load inthose days Ihada Left Picture-perfect Schweizer John Hartafleld spans 6 ft weighs 4 lb has 600 sq area 20 OS four-stroke turns Graupner 1 031/a prop Locals wondered enough power pull John wonders will make stow plane ilke original Right Black pinstriping sets off modified plastic canopy emphasizes edges pretty orange-and-white color scheme Dummy cylinder gives authentic twin opposed look thats 0S side-mounted right Neatly painted pliot earphones scans realistic instruments August 1986 35 Left Winter lecturesthe Munchkln piioon iaiurs latest masterpiece 75-in Chinook Canadian uitraiightkita German import redand-white Scale museum piece model flies like trainer its 05 40 four-stroke pusher Right Removable canopy home helmeted pilot comes kit can look instrument pylon feet Metal tail boom struts some tough plastic plywood Left Covered painted trimmed reflections dancing polished surfaces Pilot seems have left hand tiller-type control slight pointed-down tilt thrust line Rudder pushrod external elevator rod appears hidden inside tall boom Right Precisely fitting ply pieces auto-align key mid-ship structure Including pylon takes two wing panels flush ala gliders Thermic 50X showing basics drag reduction helped get 301 glide ratio out designed propeller shroud Jasco Payloader Spitzy 045 vibrated too much lent us copies Frank Zaics yearbooks admitted freely learned great deal Zaic wasnt scholarly books about aerodynamics taught us about stability drag reduction Reynolds numbers knowing born teacher never lost enthusiasm sheer wonder flight dont think ever quite sure whether old solid wood Scientific Control Line models really airplanes always interested what did encouraged us build plastic models fly college swimming pool learn effect various control settings Gwin continues also streamlined clay get better glide performance almost drowned process Dr Raspet said could see airflow put potassium permanganate nose leading edges pool declared off-limits models very soon afterthatIwonder Dr Raspets Purple Plan loved soaring considering purest possible form flight used gliders research Some early activities involved chasing buzzards Sailplane movie camera Gus Raspets Buzzard Patrol well known Starkville still remember lovely calm morning flew over hangar about 300 feet up whistling theme High Mighty Thats decided Lhadto learn fly gliders heard father doubtful about safety airplane no engine took time talk him convince him gliding wasnt dangerous powered flight worked Dr Raspet Aeronautical Experiment Station time con sisted ramshackle Quonset hut blown wings mention often over 300 pinholes per square foot precise grid pattern got very tired pin vise dont remember Tailwind have very fond memories oper ating camera tuft-studies warsurplus flat-top Laister-Kauflnann gliders used research Dr Raspet founder Mississippi State Glider Club provided single-place Schweizer 1-19 glider learned fly glider being towed down runway just below flying speed bodyless 1938 Ford instructor inthe tow car signaled pilot way move stick rudder pedals until became automatic As became expert speed increased until left ground proficiencyand grad uated 100-ft rope 900 turns final step education 500-ft rope gave us enough altitude fly landing pattern point took ourflrst dual instruction Starkville EBO Mason Sumter Pappy Camp flight instructor Charles Lindbergh Dr Raspet lent club Olympia sailplane condition restore ourselves would often stop shop late night either help us just sit drink coffee tell stories Lord did have stories Most us agreed wed rather have Dr Raspet talk peel off old fabric rebuild ribs Ive rambled far too long about guess should stop Howell thinks bot tom line Dr Raspet finest human beings Ive ever met will always special because warmth interest other plane-struck people ages hate presumptuous think Dr Raspet would like being remembered just much tremendous contributions world aerodynamics telling Gwin used word last paragraph may have known him can remember Gus Raspet Fiddler roofTradition Tradition Don Lefferts tapped knee little rubber hammer leg jumped Its gray Mondays inspired go fly circlingbuzzards Lefferts vintage auto restoration otTheat escape models Im mood see going Ive charglng cycling listening sad stories told battery packs just got back Nats Don leads off flew own-design C02 called Image Its sort compilation Old-Timer FF designs stretched pulled shape use Brown Telco-size motors Ive loaned out plans several flying Wouldnt know friend built flies better ship photos large Imageblown up use old Herkimer OK COz motor Bill Browns tanks Au Yes created worlds 36 Model Aviation Left John Oldenkamp San Diego two Lanzo props 18-in version nose 16-in version foreground Smailer proved better performer two Right Stick cabin versions Lanzo combo Text has Oldenkamps OT thoughts famous engine Brown Jr shows great promise also took FF Old-Tinier called Tlush Mite Don goes trying trim Imanaged one-bounce landingintothe side perfectly-restored 1957 Chevrolet parked line 50 ordinary cars belonging ordinary mortals beautifully-finished car belongs Sal Taibi Sal gracious gruff made feel like little kid Fooey Ed Restored isnt quite correct word Sals old car Maintained would better Sal original owner has driven continu ously since car new Fooey no doubt way vintage car guy would feel about himself clobbering Sals classic massive C02 Sal always gracious seemingly gruff Don flown i-scale Laser car would have seen gruff Jd bet Mr Tradition Taibi inter ested rendition ye olde pylon FF An Ebling Phoenix-like fuselageflat bottom sweeping curved top Surfaces remi niscent Fubars Ranirods San Diegans ancient thick undercambered alr foil prior 1950 foiks like Pete Andrews John Zalc Frank Ehling went climb then-thin lO-percenters knife-sharp lead ing edges Stab tilted RCers No cockeyed up right glides right tricky skinny pylonextending down fuselage bottom Does lean typical right power turn turbulator spar top bottom mains another aft bottom spar Golden Age polyhedral pop-up tail fuse de thermalizer Sal gonna park antique near crazy Free Flighters youll need gruff act havent made twisting climbers slow-motion glides since early SOs RC means no chasing early SOs RC planes usually crashed flew away made chas ing ridiculous Ive notions FF unlike Lefferts fun critter old Fire cracker MAN Pasture flights evening swarms barn swallows harassing its silent circles see now 035 electric motor five 500 mAh cells would need bit biggerjust rudder control retrieval shutoff maybe prevent seeding clouds Can get away Bob Kopski thing fascinates about Dave Peltzs not-too-modified Golderg J-3 Cub Electric power something might expect ingenious Sailplaner mastery computers knows geared Astro 40 cobalt 18 cells 12 Ah capacity turns its Rev-Up 13-8 prop precisely 7250 rpm horizontal flight 6250 ground Missouri Well son guy meas ures in-flight rpm via telemetry Condor Hobbies Tele-Tach consists tiny transmitter mounted plane tiny photocell pickup taped motor facing forward sees prop turning through bottom hole cowl Data rpm trans mitted handheld meter know this 1000 ground/air rpm dif Continued page 22 Y BI t x B2 -A-~1~ Y *1 B3 C Winters brain teaser month Figure standard expianation dihedral works B2 figure seems suggest anhedrai wouid unstable People like Evans have proved though case See text discussion August1986 37 Digital LCD tachometer has dual scale lox-i oox stable RPM readout Full scale voltmeter can used check/cycle TXIRX battery combos Reads load up 20 voltsand DC ammeter used check servo current Will find worn binding stalled servo conditions w/SCA1 Battery included 90 day warranty 4 Function ACCU-TACH $8995 ACCESSORIES OSAl -Quarter Scale Adapter ATi & AT2-500ma load.995 SCAl -Servo Current Adapter Airtronics Futaba Kraft 995 TLB1-Voltage Probes.295 CC1-Carrying Case will hold ACCU-TACH accessories. 1295 Send check MO NorCal Avionics A-B Tech Inc 5689 Glasgow Troy MI 48098 313 828-8210 MI add 4% tax Add $3 S&H See dealer first ATT- CHEKi ON-Board Battery Tester Saves Time. Saves Models BAiTCHEK RX-1 ein 5 usA Special Month 3/32x4x36 C Price good until Aug 1 1986 Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Protune corp 914 4626452 PO Box 1808 Poughkeepsie NY 12601 AMA CLUBS Ask about AMA Club Discounts minimum orders $10000 12020 Cent ralia Hawaiian Gardens CA 90716 213 865-3220 ference roughly one-sixth what wed tack ground takes guesswork out propunloading daily lotto game quite edge Dave accurately comparing props right now date finds Rev-Up better others tested farprobably due its thinner airfoil thinks As will see pictures J-3 nifty often stared bouncing gas indicator front windshield fullsize Cubso depressing short cross-country hops against wind cars would pass Using servo-actuated switch Daves J-3 gets 6 7 mm motor run has thermaled now Astro controller throt tle probably giving him 10- 1 1-mm run plus whatever glide time can get Climb realisticwhich what wish match type have sense scalelike flying 13-8 7000 has surprising brute pull hefty torque Peltz cautions everyone Electrics prop hitting dainty hand wont stop like glow engine therefore have arming switch Thats gospel Carl Goldberg Electric run wild adjoining room 3 am gets out bed no arming switch forgot turn off receiver weve done airborne pack faded dutifully turned on/off switch did hear guy Giant Scaie gassie started its Quadra way night didnt Pelts found electrified Cub required additional downthrust significantly right thrust gross 9 lb handled easily gear beefed up ensure accurate tracking ground handling tail wheel wire bent ard decrease ground-stance anglewhich also improves ground handling true tail-draggers Taking Tony Nacca ratos advice hes master big-scale Elec tics Dave twisted out both tips starting about two-thirds semispaninsurance happen slow up too much higher wing loadings Dave built J-3 because AMA Sound Committee As Sailplane man knows about silence does seem relate subject J-3 valid tool among others unpleasant war keep flying sites Dave gets asked about tiny stacks scalelike dummy engine big enough show easily runs turns switch find average Joe has never seen Electric Such guys dont believe thrust permitted hold J-3 Too heavy fly say Eating-crows getting scarce Daves summary noise prob lems facing future think Electric flying has grow popularity present weakness still batteries heavy energy limiting However expect well see some improvement area next few years will short time Electrics performance has doubled due better motors improved battery technology Incidentally Carl Goldberg Models expec ted add considerable Electric information kit plan because Pelts findings John Hartsflelds Schweizer tow plane speaks have published pictures series experimental RC low-wingers big its power pleasing perform ance K&B/Veco 19 spans 6 8 ft time got plan requests Hands-off soaring main objective three channels couldnt quite get combinationthough know now should have enough dihedral put tips line lower edge cockpit Continued page 130 38 Model Aviation NEW Balsa Spruce Plywood Mon Fri Kit Mfg match current prices 8am -4pm now paying better quality PST Open Public 40-60% Discounts BE PART OF AVIATIONS ANNUAL REUNION.. INVITATION TO YOU can help assure com memoration historic achievement continues opportunity par ticipate important ceremonies Societys other programs made available people young old As member will receive Societys quarterly newsletter FL YER will invited member tend participate December 17 ceremonies Memorial First Flight Luncheon unveiling honoree First Flight Shrine As member will have unique role helping assure pur poses Society met important work First Flight Shrine continues recognize honor have accomplished significant firsts aviation people might enjoy membership Society participation its programs informed opportunity PU RPOSES First Flight Society non profit memorial educational torical organization incorporated State North Carolina Its history traces 1926 Societys objectives organize conduct sponsor cosponsor promote otherwise cause appropriate ceremonies events held annually anniversary site elsewhere commemorating first powered flight Wright Brothers achievements contributions development flight encourage invite promote visits historic site people near far may see first hand birthplace powered flight foster promote public awareness widespread interest origin history future ffight its forms FIRST FLIGHT SOCIETY PO Box 1903 Kitty Hawk NC 27949 N AM P STREET CITY STATE __________ZIP Member $20 Business$l 50 National Corporation$5 00 Dues Contributions tax deductible Sorta Pitts/Shepherd Continued page 127 especially model gets air smoker really putting out roses first though took quite few flights get trimmed out model will little different keep mind arrangement shown starting point getting model adjusted fly way want have built flown monoplanes past remember different ball game wont handle same monoplane Have fun Plane Talk/Winter Continued page 38 like Rubber Scale jobs procrastinated doing redesign would have such dihedral nicely-tapered wing still tail-dragger almost spitting image Hartsfields ship romantic open cockpit Hartsfields plane answer anyone wants such aircraft However modest dihedral suggests fourchannel controls grand sport airplane plans MAN published Specs reported John span 6 ft area 600 sq weight 4 lb power OS 20F5 four-stroke prop Graupner l0-3i locals believe engine should pull okay will will beautiful John made dummy cylinder opposed twin look hard tell right-side cylinder working two-wheel gear simple sturdy scalelike cowl removes readily Location vertical tail allows simple one-piece elevator top deck suggests fulllength straight line fuselage dont know canopy stock modified home-brew unless want exact scale could almost anything canopy/open cockpit motif orange-and-white scheme accentuates long graceful wings ship proud Dont worry about climb power eight-footer climbed better six-footer flying wing will get high could possibly wish stab big enough keep bird step warm day supposes could maintain cruise fast idle wont airplane dummy pilot Chlnoolc warm moist southwest wind SP5 St 8I S Iie BENTOM BHOWN JH CAMIjilLL COMET- COVERITE DUBRO EAsv BUILT MODELS ENYA FAt FLYLINE Fox GOLDBERG- GOLDEN AGE REPRO IGENE DUBOIS- GUILLOW- K&B- K&S L R AX PACTRA- PECK-POLYMER PERFECT RN MODELS SEAGLEN SIG STERLING SULLIVAN SUPER TIGRE TAFFINDER TELCO- TOP FLITE WILLIAMS & OTHERS IESTES MODEL ROCKETS Send $100 Cash Check cc Stamps fop osac 44 page tabloid sise DISCOUNT Catalog 900 itlustraionsover 700 Kits choose MAILORDER PHONEORDER IN STORE ILLET 30137 CENTER am St LauudalmFa 19445 coast Oregon northward descends eastern faces Rocky Mountains Its appropriate name ultra-nice ultralight does explain peculiar lack awareness ultralights among us least two fine magazines filled full-color pictures reports projects just like other home-builders magical craft factory-produced kits flyaway planesthings like 50 mph lookalike Cub Citabria have images hang gliders grasshopper cuties open-air stuff wires struts over placeand immensely popularyouve missed boat Ive met first enclosed ultralight model flesh Im fascinated Kaluf blew red-and-white pusher lovely canopy big enough family goldfish Also Stoip Starlet buy locals word should law against anyone builds like spans 78 has 914 squares 40 two- four-strokes has OS four-stroke four channels Its Scale kit Canadian ultralight imported Germany means exquisite engineering requires patient assembly ingeniouslyfitted parts cut what seems like micrometer exactness Believe dont give tinkers damn about commercial plugs unvarnished reporting European plywood can different use whatever woods best suit purpose such limewood Plastics different strange-looking/smelling glues stick absolutely anything Enough photos deserve scrutiny Incidentally Bill Kaluf generally takes three months classic flying machines says complicatedlooking thing done six weeks half usual time wont take questions will forward letters Ships legend empathize fully peaks valleys starts off John Oldenkamp San Diego CA having growing up poor doing aeromodeling vacuum wait until 40th year witness True Flight ie Loss Airplane Through Thermal Activity acronym LOATTA have nothing against RC just have yet graduated finger control have Airtronics Monarch boards Project tonight John warms up tissuing 1937 Lanzo Combo Stick/Cabin jobfar too much time drawing up Zaic threeview bending hoops ribs teeny spars dog got up bench after housefly smushed whole tail Rebuilt recovered first red airplane Fourteen pieces paper wings beaut Two gigantic hand-carved freewheeling props 130 Model Aviation RON CHIDGEYS TIGER TAIL 4 ggg sq Sasic Kit 5118 Fihsqt.s Ps P. C vallatIs doss ml CABiN RIC PRODUCTS 112 IttaIs St Idaysts LA 71505 318 2327448 BYRON ORIGINALS E PCI lly. Practical Twin Ducted Fan Project Thousands satisfied modelers currently flying Byron Originals jets serve proof release kit can sure project can confidently build fly st dream designed built flown its designer few others new F-iS Eagle no exception F- 15 designed around proven Byro-Jet Propulsion System its twin Byro-Jet Fans turning nearly 20000 rpm producing 24 241/2 total pounds thrust Eagle delivers speed rate climb maneuver ability expect Byron Originals jet Unique Exclusive Components new F-i 5 far too numerous attempt describe magazine ad Detailed Info Pack includes brochure owners manual set reduced construction drawings kit pricing send $200 Get full story F-i 5 its long list exclusive features Custom Retractable Main Gear lutionary New Nose Gear Design matic Landing Gear Brake System Functional Pneumatic Speed Brake iled Fiberglass Fuselage Factory Installed Formers -in Wings Stabs Fins Precise Construction Methods Specifications wing Span 70channels 5 w/retracts Length 89 7 wls peed brake Ready-to-fly weight 28 lbs lending gear brakes Power - Twin Byro-Jet Performance Systems w/Rossi 81 orequiv Byron Originals Box 279lda Grove IA 51445 Ph 712 364-3165 also red Nice 2-in-dia wheels sanded out filled polished painted black Have set both up bench Since no admire mc share Pretty things Red always preferred yellow Until today Nearly ran out covering paper batch bought 15 years ago Now alcohol-shrink water Warps bad remember Forties nobody ever mentioned alterna tive beasts going get aerobap tism next Sunday over near Las Vegas OldTimer meet Oldenkamp goes VAMPS thing huge dry lake Reservations made Motorbike fueled up ready Have never Im certain will like rendition Lanzo huge vertical tall will blow minds isa pre-something ship defies modernity Looking prop specified judg ment great Chester Lanzo must have out mind quote 18 mill sol made up modest unit 16 high pitch will fly buggers like fly P-30s have sense will take photo graphs before sticking air maybe will rain blow will sit motel just plain talk am puzzled John says whet interest gravitate retrograde devices deep inside know squaretipped flat-bottomed mostly-sheet bird will run circles around what have just spent three weeks a-building eyes fingers hurt have shot up precious stash red tissue am fighting warps inch way Put nasty cut thumb carving props buck knife sucker will probably terminally tail heavy wind up will Mercury Seven Flight Phoenix Wright brothers over again Chester Lanzo hope nice guy four years old Lanzo launched prototype creations six Korda wowed guys back East did know Gas gasoline nor heard Maxwell Bassett interim aeromodeler hordes bridged too-young-to-know period now recognize Golden Age Modeling hoarded glue duringthe scarcity WW II days Balsa diverted military purposes flew paper airplanes out barn top did lot pretending fly airplanes whatever sort interest fueled world events As 12year-olds volunteered painfully scratch out identification models school thrilled whenever stray Selfridge Field P-47 passed over Oh elliptical planforms fat undercambered ribs hundreds hunks fuselage funky wheels bamboo bits Wonders Oldenkamp What wrong people design weird difficult gizmos Thank God now Hot Stuff good wood real razor blades T-pins Celotex building boards like None begins explain still build difficult old models John thinks case Half Korda all-sheet exercise Ed MA plan No 125 $1 75 led chase through Zaic yearbooks looking perfect most-beautiful model first disap pointment course instant discovery Old-Timers featured complex multi-curved outlines dumb fat proportions etc people nuts least current standards Cranks masochists build OldTimers right Ever made Korda Wakefield John asks What winners fly same straight up slight right spiral low dip glide off somewhere usually much need dether malizer Unnerving Spectacular cabin jobs accidents design insofar aerodynamics concerned probably masterpieces romance lore Zaic yearbooks usually listed longest flight achieved particular model fre quently somewhere between 12 42 minutes Powerful binoculars days strong legs maybe chased Model As got job done built flew crashed know did exist art form very much worth effort duplication discovery preservation things once done recreation miasma long since committed various libraries touching process creation however arcane immense delight am digging up past lam basically refaniiliarizing myself moments disappeared over hill far too quickly rush puberty manhood Long live Chet Lanzo Long live rubberband Red airplanes hope curse assumes some time passed before Oldenkamp added PS about flight experiences Rambled off 375 miles Henderson NV over weekend VAMPS Las Vegas Antique Model Airplane Society Annual Nice folks Vast site warm buoyant air hardpacked shiny dirt crust underfoot Magnifi cent mount scarps Stayed funky casino just three miles Hoover Dam sharing space noise Lake Mead drag boat crew WeirdContinued page 135 August 1986 131 F-l5EagI 1/7 Scale Exceptional Performance True Byro-Jet Style. iake-off distance paved runway less 250 feet little practice nose high landings predictable F-iS climbs authority good steady rate has solid positive groovy responsive feel Engine out performance outstanding ight trim changes enable hands-off straight level flight no need land until youre ready Plus Byron F-i 5 offers unlimited scale possibilities its priced com petitively other twin engine jets comparable size E E PERFORMANCE Step-By-Step Instructions lete Rolled Plans rate Machine Die Cut Balsa Spruce Plywood ce Spars Launch Strength TH HAND LAUNCH E HI-START H 59 Span 15 Oz 2 channel 370 Sq Area computer Modified E-193 Airfoil DAVEY Eh1SYSTEMS mwm CORPORATION ONE WOOD LANE MALVERN PA 19355 215 644-6772 Plane Talk/Winter Continued page 131 Lanzos fly Trembling nerves withstanding model got assembled photo graphed loaded modest amount rubber45 grams modem stuff Dry whole model weighed mere 100 grams 300 tenuous turns beast off its maiden voyage stally putted around sorta right kinda up came down near cars dented shiny red prop Darn shouldnt make trim change time appeared ship needed right down thrust plus some weight up front cure stall Added Y16 shim taped quarter nose second flight went up smoothiy same turnsgoing nowhere looking safe turns Risking packed 900 Fortunately lit DT fuse model shot off rapidly climbed throughout entire prop run hooked boomer soon become speck red looked great Itwas up about 7mm landed sight half-mile downwind retrieved foot san dals plopping along dry lake surface certainly thrilled gave toast C Lanzo now know built ancient heap understanding era investigate trace mind handiwork greats build some trust perhaps methods gain perspective probably little respect aeromodeling rootsnot within awareness until now Hope can find red tissue China connection Joe Tschirgi remember tailless Giant Stik May column paid dues retired English teacher Ninjing taken lightly book experts love argue such stuff offers correction make no arguments Just read Subject statement March 1986 issue MA concerning flying planks heavily reflexed airfoil makes stable Facts 1 Airfoil camberpositive reflex inverted zerohas nothing static stability 2 Youre certainly alone belief 9999% knowledgeable modelers surprising number full-scale aero en glneers would agree ie think reflex airfoils have stable center pressure travel Explanation 1 Static pitch stability aircraft rate change pitching moment angle attack 2 conventional air foilsthick thin cambered symmetric re flex inverted flathave constant aerody namic moments usable angle attack range 3 purpose reflex camber tailless configuration provide nose-up moment like angular difference tailed aircraft trims vehicle usable lift co efficient 4 NACA NASAs predecessor habit presenting airfoil Center Pressure defined moment divided lift led misunder standing stopped publishing meaning less confusing data conjunction airfoils over 50 years ago 5 center lift Aerodynamic center AC lift curve slope airfoil section parameters have significant influence static stability Both essentially fixed values AC 25% chord Ct/a0 1 per degree identical very few percent airfoils ie AC does move angle attack Repeat Does move Proof 1 Take old Free Flight wing junk pile Mount stick fuselage big fixed vertical fin aft wing 2 Mount big flat plate drag area about 2i chord lengths above wing Required area depends wing camber the 10% wing good starting point 3 Balance thing 15-18% MAC try hand glide Use usual trimming procedures remem ber drag area same thing angular difference the 4 Youll find thing glides stably inefficiently Obviously least drag area combined aft CG can get away will produce best glide Years ago eminent engineer presented lecture DCRC Club significant number odd configurations model glider form would work among glider suggested Tschirgi Van Hattum retired Holland used similar examples including Joes teaching July-August 1973 issue Junior Modeler Van Hattum published fasci nating article including nine radicals three-views picture achieved Joes result merely using tail vertical square stick projecting aft end fuselage Article title Gliders Nine Going sublime ridiculous heres teaser dihedral Theres diagram dard explanation dihedral works armY longerthan armX lift results Y side plane returned normal flight B 1 plane anhedral stable Yes Consider Evans Desperado quite stable full-scale examples So B2 arm Y shorter arm X Now correct can example B2 stable Shouldnt roll out control Continued page 136 .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74 3 Pak$495 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit5395 P0 Box68132 AIRCRAFT CO Portland OR 97268 Ready Fly$795 Add $3 postage handling first 2 packages 10 additional DGA Designs 0 D0A00 DC Designs 0 0 0 Cs0 0 j C o5 0 0 QuarterMaster 1SPORT BIPE S QUARTER SCALE PLANS Quarter Master Sport Bipe8 1f Guadra 35. 73Spafl.EZ build. Great Flyer.Semi-Ki AvaIlable..PPO 0 DAVIS D-1K sOaSpan. 0 Ouadra 35 power Similar. PPO CC 91933 KINNER SPORTSTER 5Modet K.117Span 035 power pPo5 5 _ oCs 4-CYCLE PROJECTS AKRON FUNK 15 Scale 54 Span deeCs 4 cycle. FantaStic FlyerPPoeI ________0 DAVIS D1K* 603 Spar. cycleorsirnilar..rP051D Two Inch wale Sieth scale _____________0 Cs 1933 KINNER SPORTSTER88 Cs Model K.75 Span. el-75.4cy PPO$ I110 Photo reduced try, Id Scale Plans oro Inch scale SIxth scale ________0 00A Plane0 cowing C PHOTO DOCUMENTATION PACKS available- 0 Scale Plans ALL PLANS ROLLEDSHIPPED UPS Conpleteelnstroctien Booklet Send sl00 Catalog O New York State Residents add 7% sales tao. Send check J o MO Os. Allow 3weoks tOr cflecktocleer Cs mU m] j [Ci st 1986 135 IfyoushouldthinkofslipflOtethatB3 what youd see wing RC pilot OK know better say matter relative wind acting upon dihedraled wings banked turn inside wing has greater angle attack outside stabilizes fun Does centrifugal force play part location CGthat high low pendulum effect What does presence centrifugal force banked turn know nothing Dont ask offer C old-fashioned turn-and-bank indicator instrnment tilted would leftbanked turn slip skid yaw equalized pilot coordination ball cen tered skid greater ball would move toward right side slip greater ball sinks toward left side plane itself can center ball what modelers call spirally stable piloting input required neutrally-stable moreacrobatic craft machine man together still center ball ball will center design has some deficiency difficult fly unflyable Whimsy flat-winged Stik close hands-off FF flat-winged Lacey Fike will fly OK Air three-dimensional often think terms two dimensionslike diagram Drop wing aileron pull upelevator model whips around know wing loadings go sky high high some times small heavy models youll snap out control plane pushing agalnst alr toward outside turn its angle attack affected holding upelevator wing perhaps nearer stall large part due centrifugal force free-to-pivot pendulum hung beneath belly would point wonders about Frank Zaics book Circu lar Airflow available AMA Supply & Service Section wondered about airflow phenomenawith turn-and-banked aircraftmany years ago Ive models would fly themselves around 360add bit nose weight becomes 720 vice-versa until cant hold 360 Such models seemingly can fine-tuned go neutrally stable banked circles yet flying hands-off neither recover ing nor degrading continuous-banked turns Argue leave out dont know nuttinunless name Tschirgi Planes wonderful things Perhaps ought wonder Bill Winter 4432 Altura Ct. Faitfax VA 22030 Radio Technique/Myers Continued page 41 redundant RF link Roland Spicer fascinating person talk pursued dream setting RC cross-country record great care intelligence describes event enthusiasm would credit much younger man can see Roland airplane description flight RC Video Magazine Volume 3 plane scale model Wallace Beerys Bellanca dedicated Rolands lifetime friend Allison Buck can seen hanglng ceiling AMA museum AMA Headquarters building Reston VA Ask Hurst Bowers tell about case havent noticed better times interference- reliability-wise rnshing down us George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Aid/Edberg Continued page 43 forklift required four RC channels launcher required two platform up/down launcher release decided use single transmitter con trol both gadgets same time wouldnt need juggle transmitters running experiment decided use trusty Futaba J Series system needed least six channels available Because two receivers would inside vacuum chamber made 1-in-thick solid steel walls felt using J Series quite reasonable transmitter shown behind forklift shots way radio signals get through receivers inside chamber through small Plexiglas window concerned two receivers same fre quency might interfere other both RC systems performed flawlessly through testing As far know first time model RC system has operated vacuum two receivers sub jected share electrical noise motors powered both forklift resetting mechanism launcher noise did affect operation receivers made big racket FM receiver used gather data telemetry system later found out several companies manufacture brushless DC motors supposed operate vacuum out generating electrical noise Next time Im using vacuum Ill give try Both forklift launcher pow ered sealed lead-acid D cells having 4 Ah capacity huge batteries known safe operate vacuum recharged after days testing constant-voltage charger case forklift extra weight lead-acid cells helped provide extra traction driving around foam rubber However often quite enough made snow tires pushing staples facing outward through tires cured traction problem launcher forklift arrangement worked extremely well After bit practice became proficient enough two oould have specimen back top launcher within 2 minutes may seem long time until consider specimen bounces ran domly foam-rubber-covered floor takes 90 seconds just recycle launcher case much less time 20 minutes needed recycle vacuum chamber wont go details results testing because really terest people field space craft dynamics will say results good enough Stanford award 136 Model Aviation Eke. Quality r S 937 x 156 x 175 18 oz 46 oz torque Years development have produced finest state-ofthe art receivers ever made Flight tests over country haveThe workhorse Ace servos Perfect Patternships Quarter Scale Boats Cars proven receiver will fly others fail Solid glitch-freeapplication high power required performance air plane attitude frequencies/channelsLIIIIIJ 14G20AAtlas Servo Kit$2395 Available Z7 50 53 72 75mHzAC 14G2OACAtlas Servo assembled$3146 12G70 Silver Seven Receiver Kit$3895 Available dealer order direct add $200 Ace RIC 116W 19th St Box SuB Higginsville MO 64037 816 584-721
Edition: Model Aviation - 1986/08
Page Numbers: 34, 35, 36, 37, 38, 130, 131, 135, 136
Bill Winter _____I3 EO 0 Plane Talk_______ OFF TO SEE THE WIZARD PA system blasted Light Horse Cavalry Overture Continentals 727 leaned its California leg out Denver hub West days Continental gimmick iron bird human terms Cross goal line leap hurdle lift bale Rotation music stopped Clapping hands cheers Seat belts prevented standing ovation Touch down Ontario came overture reach its wild climax magic carpet turned onto taxiway Encore Super ghostly 727 making music endlessly crisscrosses snowy peaks Jack Benny land Anaheim Azusa Cucamonga Watch step Cucamonga plane doesnt land Actually Rancho Cucamongaonly few miles Ontario Airport sitting patio February staring cardboard cutout mountalns 94 dry degrees shade enough whiten steers skull Incognito escape dead-stick mind Bill Evans found wizard wings 250 miles away Bishop fullsize sailpianers famed standing wave will loft 40000 ft beyond would budge although Dasher 40 crazy Des perado speeded-up modified Krackerjac tail Guys ribbed him much went fishing two weeks High Sierras Ill send friend Arrow pick up got foggy four days early morn beamed up patio announce will fly Gadzooks Fog now houses everywhere Guys thereeast south Los Angeles like strolling street players used work North Chicago family-style oases ends streets Three blocks away could fly Electric no fuss Ten minutes drive found nearly mile square flat field throughway far enough off safe Douglas plant distance paved highway fly off curbed lines car appearing distance about 20 min utes Small groups pairs trios kept arrivingmaking few flights departing join other similar groups Never saw club field hotshot pilotexcept Wizard Bill Evans Some dont see model magazines much else guess have ball hacker menagerie taught guy fly lickety split No knew either Evans Just two boys thought flying 60 Desperado mixed up version radar-timed police air show average roughiy 170 mph two runs upwind downwind long diving entries found critter has piped K&B 21 making similarly piped version K&Bs new plainbearing engine grudgingly agreeing bit span Trust keeps saying After view ing videotape 60 tape now AMA Museum AMA Executive Director John Worth muttered thing violates thing weve taught Dont think flying wing unstable stabilizer essential anhedral does workor technical articles diagram principle dihedral thing violated aerodynamic laws being immutable mind-set us have about everything familiar Seeing believing air ocean downwind turns and. some other time Youll remember 6-ft-plus Krackeijac itself modified early smaller threechannel ship 60s recent spoiler article Evans discussed 3141 airfoil evans Cranks up K&B piped 21 version Desperado prior Winters foray Star Wars found strange bird possess both neutrai go-where-you-point-it hands-off stabiiity no-taii detente know Evans kept Kracker jac after offering ship East whereas Winter has exact dupilcate Desperado lifting section two-thirds thickness above centerline provided l1 angular difference between wing/stab 20 dihedral skinned-foam wing tail OS 60 power Nice indeed got fly have Desperado mind has severe anhedral huge billboard vertical flying wings go like scat D unique stays pointed having flown found pussycat used high cruise also hands-off stable strange docile quick sport job bash around Sundays As easy fly conservative wingy cabin Krackeijac Desperado probably builds one-third time No orientation problems weirdly-configured wing until got too far out going away fog fringes suddenly looked like three-bladed prop Which two blades wings left two right two bottom two knew what next Since would sit handed transmitter Evans word Orientation 200 yards off no brave old pilots Space glorious space Psyched up back future Iknew Icould fly aerobatics Californiais Land Can Virginia Land Cant Back little flying site nice know am 20 years younger Aerobatics did high-jinks go 34 Modet Aviation After Bill Evans enticed Winter building Evans orange Krackerjac framed against genteel version Simitar flying wing snow-topped peaks Bishop ver old boy pound flesh Evans sion has balsa-skinned foam wing stab buiit new version Krackerjac a %l/ foil 1 1/2 decalage fiaperons stabilizer bitter pill swailowi Un- OS 60 Locals ribbed theflying-wing man expected fate brought two together badly go fishing two weeks some pisin fun flying under low thin fog mile square field just south LA Pleasure find Don Lefferts didnt have look very hard find Brown Teico CO-2-powered Mirage FF Plc shows blown-up version larger Herkimer CO-2 After WW ii engine mass production columns custodian sees good ies everywheresuch turbulator spars lines Fubars Ramrods San Diegans Left Whats different about Goldberg J-3 Cub its beautifuily built chocolate sprinkies thats ciuc Builder Dave Peitz isa member AMAs Sound Committe decided evaluate noiseless Scale model Hidden between cylinders its dummy twin Astro geared 40 whIch spins 13-8 Rev-Up 61/2 7 mm realistIc power flight Oh yes has soared Its all-up weight 91/i lb Right cowl removed removable ply box mount shows firewall extended forward Front plate 1/4-ln ply holed cooling Because motor has protruding brushes inserts rearhence bolt-on box Dave uses Teie-Tach measure rpm flight telemetry allowing precise prop comparisons Condor Hobbles device utilizes tiny transmit ter plane photocell pickup reads rpm through hole cowl Data transmitted hand-held meter ground Left inside story Three rows six 1 2V cells iSin Pack rests four1/s-in-sq pieces glued floor 3/4-in-sq across fuselage rear pack prevent sliding similartop crosspleces fitted under ply longerons hold-down Internal antenna attached strip runs aft strengthen gear accurate tracking wires attach ply fairings smail metal cable clamps Electric J-3 required downthrust considerable right Peltzs mods will added Goldberg plans Right asked what type four-stroke has Dave replies Wililams/Astro 40 aboutthe small exhaust pipes explains keep quiet heturns motor curious filp out Engine made fourWilliams Wright cylinder kits scrap balsa Tached 6250 rpm ground itturns 7250 air man named Gus mention Dr August Raspet discussion Al Backstrom MA April brought back flood memories Howell W Gwin Jr writes Beaumont TX went high school son David Starkville MS graduated Mississip pi State 1959 degree English remember Dr Raspet well about dozen us modelers Starkville profited Dr Raspets interest took same delight models did Richard Johnsons RJ-5 Although leading authorities boundary layer control always time talk airplanes us Id hate count number models constructed part scrap pile shop primarily interested Towline Gliders PAA Load inthose days Ihada Left Picture-perfect Schweizer John Hartafleld spans 6 ft weighs 4 lb has 600 sq area 20 OS four-stroke turns Graupner 1 031/a prop Locals wondered enough power pull John wonders will make stow plane ilke original Right Black pinstriping sets off modified plastic canopy emphasizes edges pretty orange-and-white color scheme Dummy cylinder gives authentic twin opposed look thats 0S side-mounted right Neatly painted pliot earphones scans realistic instruments August 1986 35 Left Winter lecturesthe Munchkln piioon iaiurs latest masterpiece 75-in Chinook Canadian uitraiightkita German import redand-white Scale museum piece model flies like trainer its 05 40 four-stroke pusher Right Removable canopy home helmeted pilot comes kit can look instrument pylon feet Metal tail boom struts some tough plastic plywood Left Covered painted trimmed reflections dancing polished surfaces Pilot seems have left hand tiller-type control slight pointed-down tilt thrust line Rudder pushrod external elevator rod appears hidden inside tall boom Right Precisely fitting ply pieces auto-align key mid-ship structure Including pylon takes two wing panels flush ala gliders Thermic 50X showing basics drag reduction helped get 301 glide ratio out designed propeller shroud Jasco Payloader Spitzy 045 vibrated too much lent us copies Frank Zaics yearbooks admitted freely learned great deal Zaic wasnt scholarly books about aerodynamics taught us about stability drag reduction Reynolds numbers knowing born teacher never lost enthusiasm sheer wonder flight dont think ever quite sure whether old solid wood Scientific Control Line models really airplanes always interested what did encouraged us build plastic models fly college swimming pool learn effect various control settings Gwin continues also streamlined clay get better glide performance almost drowned process Dr Raspet said could see airflow put potassium permanganate nose leading edges pool declared off-limits models very soon afterthatIwonder Dr Raspets Purple Plan loved soaring considering purest possible form flight used gliders research Some early activities involved chasing buzzards Sailplane movie camera Gus Raspets Buzzard Patrol well known Starkville still remember lovely calm morning flew over hangar about 300 feet up whistling theme High Mighty Thats decided Lhadto learn fly gliders heard father doubtful about safety airplane no engine took time talk him convince him gliding wasnt dangerous powered flight worked Dr Raspet Aeronautical Experiment Station time con sisted ramshackle Quonset hut blown wings mention often over 300 pinholes per square foot precise grid pattern got very tired pin vise dont remember Tailwind have very fond memories oper ating camera tuft-studies warsurplus flat-top Laister-Kauflnann gliders used research Dr Raspet founder Mississippi State Glider Club provided single-place Schweizer 1-19 glider learned fly glider being towed down runway just below flying speed bodyless 1938 Ford instructor inthe tow car signaled pilot way move stick rudder pedals until became automatic As became expert speed increased until left ground proficiencyand grad uated 100-ft rope 900 turns final step education 500-ft rope gave us enough altitude fly landing pattern point took ourflrst dual instruction Starkville EBO Mason Sumter Pappy Camp flight instructor Charles Lindbergh Dr Raspet lent club Olympia sailplane condition restore ourselves would often stop shop late night either help us just sit drink coffee tell stories Lord did have stories Most us agreed wed rather have Dr Raspet talk peel off old fabric rebuild ribs Ive rambled far too long about guess should stop Howell thinks bot tom line Dr Raspet finest human beings Ive ever met will always special because warmth interest other plane-struck people ages hate presumptuous think Dr Raspet would like being remembered just much tremendous contributions world aerodynamics telling Gwin used word last paragraph may have known him can remember Gus Raspet Fiddler roofTradition Tradition Don Lefferts tapped knee little rubber hammer leg jumped Its gray Mondays inspired go fly circlingbuzzards Lefferts vintage auto restoration otTheat escape models Im mood see going Ive charglng cycling listening sad stories told battery packs just got back Nats Don leads off flew own-design C02 called Image Its sort compilation Old-Timer FF designs stretched pulled shape use Brown Telco-size motors Ive loaned out plans several flying Wouldnt know friend built flies better ship photos large Imageblown up use old Herkimer OK COz motor Bill Browns tanks Au Yes created worlds 36 Model Aviation Left John Oldenkamp San Diego two Lanzo props 18-in version nose 16-in version foreground Smailer proved better performer two Right Stick cabin versions Lanzo combo Text has Oldenkamps OT thoughts famous engine Brown Jr shows great promise also took FF Old-Tinier called Tlush Mite Don goes trying trim Imanaged one-bounce landingintothe side perfectly-restored 1957 Chevrolet parked line 50 ordinary cars belonging ordinary mortals beautifully-finished car belongs Sal Taibi Sal gracious gruff made feel like little kid Fooey Ed Restored isnt quite correct word Sals old car Maintained would better Sal original owner has driven continu ously since car new Fooey no doubt way vintage car guy would feel about himself clobbering Sals classic massive C02 Sal always gracious seemingly gruff Don flown i-scale Laser car would have seen gruff Jd bet Mr Tradition Taibi inter ested rendition ye olde pylon FF An Ebling Phoenix-like fuselageflat bottom sweeping curved top Surfaces remi niscent Fubars Ranirods San Diegans ancient thick undercambered alr foil prior 1950 foiks like Pete Andrews John Zalc Frank Ehling went climb then-thin lO-percenters knife-sharp lead ing edges Stab tilted RCers No cockeyed up right glides right tricky skinny pylonextending down fuselage bottom Does lean typical right power turn turbulator spar top bottom mains another aft bottom spar Golden Age polyhedral pop-up tail fuse de thermalizer Sal gonna park antique near crazy Free Flighters youll need gruff act havent made twisting climbers slow-motion glides since early SOs RC means no chasing early SOs RC planes usually crashed flew away made chas ing ridiculous Ive notions FF unlike Lefferts fun critter old Fire cracker MAN Pasture flights evening swarms barn swallows harassing its silent circles see now 035 electric motor five 500 mAh cells would need bit biggerjust rudder control retrieval shutoff maybe prevent seeding clouds Can get away Bob Kopski thing fascinates about Dave Peltzs not-too-modified Golderg J-3 Cub Electric power something might expect ingenious Sailplaner mastery computers knows geared Astro 40 cobalt 18 cells 12 Ah capacity turns its Rev-Up 13-8 prop precisely 7250 rpm horizontal flight 6250 ground Missouri Well son guy meas ures in-flight rpm via telemetry Condor Hobbies Tele-Tach consists tiny transmitter mounted plane tiny photocell pickup taped motor facing forward sees prop turning through bottom hole cowl Data rpm trans mitted handheld meter know this 1000 ground/air rpm dif Continued page 22 Y BI t x B2 -A-~1~ Y *1 B3 C Winters brain teaser month Figure standard expianation dihedral works B2 figure seems suggest anhedrai wouid unstable People like Evans have proved though case See text discussion August1986 37 Digital LCD tachometer has dual scale lox-i oox stable RPM readout Full scale voltmeter can used check/cycle TXIRX battery combos Reads load up 20 voltsand DC ammeter used check servo current Will find worn binding stalled servo conditions w/SCA1 Battery included 90 day warranty 4 Function ACCU-TACH $8995 ACCESSORIES OSAl -Quarter Scale Adapter ATi & AT2-500ma load.995 SCAl -Servo Current Adapter Airtronics Futaba Kraft 995 TLB1-Voltage Probes.295 CC1-Carrying Case will hold ACCU-TACH accessories. 1295 Send check MO NorCal Avionics A-B Tech Inc 5689 Glasgow Troy MI 48098 313 828-8210 MI add 4% tax Add $3 S&H See dealer first ATT- CHEKi ON-Board Battery Tester Saves Time. Saves Models BAiTCHEK RX-1 ein 5 usA Special Month 3/32x4x36 C Price good until Aug 1 1986 Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Protune corp 914 4626452 PO Box 1808 Poughkeepsie NY 12601 AMA CLUBS Ask about AMA Club Discounts minimum orders $10000 12020 Cent ralia Hawaiian Gardens CA 90716 213 865-3220 ference roughly one-sixth what wed tack ground takes guesswork out propunloading daily lotto game quite edge Dave accurately comparing props right now date finds Rev-Up better others tested farprobably due its thinner airfoil thinks As will see pictures J-3 nifty often stared bouncing gas indicator front windshield fullsize Cubso depressing short cross-country hops against wind cars would pass Using servo-actuated switch Daves J-3 gets 6 7 mm motor run has thermaled now Astro controller throt tle probably giving him 10- 1 1-mm run plus whatever glide time can get Climb realisticwhich what wish match type have sense scalelike flying 13-8 7000 has surprising brute pull hefty torque Peltz cautions everyone Electrics prop hitting dainty hand wont stop like glow engine therefore have arming switch Thats gospel Carl Goldberg Electric run wild adjoining room 3 am gets out bed no arming switch forgot turn off receiver weve done airborne pack faded dutifully turned on/off switch did hear guy Giant Scaie gassie started its Quadra way night didnt Pelts found electrified Cub required additional downthrust significantly right thrust gross 9 lb handled easily gear beefed up ensure accurate tracking ground handling tail wheel wire bent ard decrease ground-stance anglewhich also improves ground handling true tail-draggers Taking Tony Nacca ratos advice hes master big-scale Elec tics Dave twisted out both tips starting about two-thirds semispaninsurance happen slow up too much higher wing loadings Dave built J-3 because AMA Sound Committee As Sailplane man knows about silence does seem relate subject J-3 valid tool among others unpleasant war keep flying sites Dave gets asked about tiny stacks scalelike dummy engine big enough show easily runs turns switch find average Joe has never seen Electric Such guys dont believe thrust permitted hold J-3 Too heavy fly say Eating-crows getting scarce Daves summary noise prob lems facing future think Electric flying has grow popularity present weakness still batteries heavy energy limiting However expect well see some improvement area next few years will short time Electrics performance has doubled due better motors improved battery technology Incidentally Carl Goldberg Models expec ted add considerable Electric information kit plan because Pelts findings John Hartsflelds Schweizer tow plane speaks have published pictures series experimental RC low-wingers big its power pleasing perform ance K&B/Veco 19 spans 6 8 ft time got plan requests Hands-off soaring main objective three channels couldnt quite get combinationthough know now should have enough dihedral put tips line lower edge cockpit Continued page 130 38 Model Aviation NEW Balsa Spruce Plywood Mon Fri Kit Mfg match current prices 8am -4pm now paying better quality PST Open Public 40-60% Discounts BE PART OF AVIATIONS ANNUAL REUNION.. INVITATION TO YOU can help assure com memoration historic achievement continues opportunity par ticipate important ceremonies Societys other programs made available people young old As member will receive Societys quarterly newsletter FL YER will invited member tend participate December 17 ceremonies Memorial First Flight Luncheon unveiling honoree First Flight Shrine As member will have unique role helping assure pur poses Society met important work First Flight Shrine continues recognize honor have accomplished significant firsts aviation people might enjoy membership Society participation its programs informed opportunity PU RPOSES First Flight Society non profit memorial educational torical organization incorporated State North Carolina Its history traces 1926 Societys objectives organize conduct sponsor cosponsor promote otherwise cause appropriate ceremonies events held annually anniversary site elsewhere commemorating first powered flight Wright Brothers achievements contributions development flight encourage invite promote visits historic site people near far may see first hand birthplace powered flight foster promote public awareness widespread interest origin history future ffight its forms FIRST FLIGHT SOCIETY PO Box 1903 Kitty Hawk NC 27949 N AM P STREET CITY STATE __________ZIP Member $20 Business$l 50 National Corporation$5 00 Dues Contributions tax deductible Sorta Pitts/Shepherd Continued page 127 especially model gets air smoker really putting out roses first though took quite few flights get trimmed out model will little different keep mind arrangement shown starting point getting model adjusted fly way want have built flown monoplanes past remember different ball game wont handle same monoplane Have fun Plane Talk/Winter Continued page 38 like Rubber Scale jobs procrastinated doing redesign would have such dihedral nicely-tapered wing still tail-dragger almost spitting image Hartsfields ship romantic open cockpit Hartsfields plane answer anyone wants such aircraft However modest dihedral suggests fourchannel controls grand sport airplane plans MAN published Specs reported John span 6 ft area 600 sq weight 4 lb power OS 20F5 four-stroke prop Graupner l0-3i locals believe engine should pull okay will will beautiful John made dummy cylinder opposed twin look hard tell right-side cylinder working two-wheel gear simple sturdy scalelike cowl removes readily Location vertical tail allows simple one-piece elevator top deck suggests fulllength straight line fuselage dont know canopy stock modified home-brew unless want exact scale could almost anything canopy/open cockpit motif orange-and-white scheme accentuates long graceful wings ship proud Dont worry about climb power eight-footer climbed better six-footer flying wing will get high could possibly wish stab big enough keep bird step warm day supposes could maintain cruise fast idle wont airplane dummy pilot Chlnoolc warm moist southwest wind SP5 St 8I S Iie BENTOM BHOWN JH CAMIjilLL COMET- COVERITE DUBRO EAsv BUILT MODELS ENYA FAt FLYLINE Fox GOLDBERG- GOLDEN AGE REPRO IGENE DUBOIS- GUILLOW- K&B- K&S L R AX PACTRA- PECK-POLYMER PERFECT RN MODELS SEAGLEN SIG STERLING SULLIVAN SUPER TIGRE TAFFINDER TELCO- TOP FLITE WILLIAMS & OTHERS IESTES MODEL ROCKETS Send $100 Cash Check cc Stamps fop osac 44 page tabloid sise DISCOUNT Catalog 900 itlustraionsover 700 Kits choose MAILORDER PHONEORDER IN STORE ILLET 30137 CENTER am St LauudalmFa 19445 coast Oregon northward descends eastern faces Rocky Mountains Its appropriate name ultra-nice ultralight does explain peculiar lack awareness ultralights among us least two fine magazines filled full-color pictures reports projects just like other home-builders magical craft factory-produced kits flyaway planesthings like 50 mph lookalike Cub Citabria have images hang gliders grasshopper cuties open-air stuff wires struts over placeand immensely popularyouve missed boat Ive met first enclosed ultralight model flesh Im fascinated Kaluf blew red-and-white pusher lovely canopy big enough family goldfish Also Stoip Starlet buy locals word should law against anyone builds like spans 78 has 914 squares 40 two- four-strokes has OS four-stroke four channels Its Scale kit Canadian ultralight imported Germany means exquisite engineering requires patient assembly ingeniouslyfitted parts cut what seems like micrometer exactness Believe dont give tinkers damn about commercial plugs unvarnished reporting European plywood can different use whatever woods best suit purpose such limewood Plastics different strange-looking/smelling glues stick absolutely anything Enough photos deserve scrutiny Incidentally Bill Kaluf generally takes three months classic flying machines says complicatedlooking thing done six weeks half usual time wont take questions will forward letters Ships legend empathize fully peaks valleys starts off John Oldenkamp San Diego CA having growing up poor doing aeromodeling vacuum wait until 40th year witness True Flight ie Loss Airplane Through Thermal Activity acronym LOATTA have nothing against RC just have yet graduated finger control have Airtronics Monarch boards Project tonight John warms up tissuing 1937 Lanzo Combo Stick/Cabin jobfar too much time drawing up Zaic threeview bending hoops ribs teeny spars dog got up bench after housefly smushed whole tail Rebuilt recovered first red airplane Fourteen pieces paper wings beaut Two gigantic hand-carved freewheeling props 130 Model Aviation RON CHIDGEYS TIGER TAIL 4 ggg sq Sasic Kit 5118 Fihsqt.s Ps P. C vallatIs doss ml CABiN RIC PRODUCTS 112 IttaIs St Idaysts LA 71505 318 2327448 BYRON ORIGINALS E PCI lly. Practical Twin Ducted Fan Project Thousands satisfied modelers currently flying Byron Originals jets serve proof release kit can sure project can confidently build fly st dream designed built flown its designer few others new F-iS Eagle no exception F- 15 designed around proven Byro-Jet Propulsion System its twin Byro-Jet Fans turning nearly 20000 rpm producing 24 241/2 total pounds thrust Eagle delivers speed rate climb maneuver ability expect Byron Originals jet Unique Exclusive Components new F-i 5 far too numerous attempt describe magazine ad Detailed Info Pack includes brochure owners manual set reduced construction drawings kit pricing send $200 Get full story F-i 5 its long list exclusive features Custom Retractable Main Gear lutionary New Nose Gear Design matic Landing Gear Brake System Functional Pneumatic Speed Brake iled Fiberglass Fuselage Factory Installed Formers -in Wings Stabs Fins Precise Construction Methods Specifications wing Span 70channels 5 w/retracts Length 89 7 wls peed brake Ready-to-fly weight 28 lbs lending gear brakes Power - Twin Byro-Jet Performance Systems w/Rossi 81 orequiv Byron Originals Box 279lda Grove IA 51445 Ph 712 364-3165 also red Nice 2-in-dia wheels sanded out filled polished painted black Have set both up bench Since no admire mc share Pretty things Red always preferred yellow Until today Nearly ran out covering paper batch bought 15 years ago Now alcohol-shrink water Warps bad remember Forties nobody ever mentioned alterna tive beasts going get aerobap tism next Sunday over near Las Vegas OldTimer meet Oldenkamp goes VAMPS thing huge dry lake Reservations made Motorbike fueled up ready Have never Im certain will like rendition Lanzo huge vertical tall will blow minds isa pre-something ship defies modernity Looking prop specified judg ment great Chester Lanzo must have out mind quote 18 mill sol made up modest unit 16 high pitch will fly buggers like fly P-30s have sense will take photo graphs before sticking air maybe will rain blow will sit motel just plain talk am puzzled John says whet interest gravitate retrograde devices deep inside know squaretipped flat-bottomed mostly-sheet bird will run circles around what have just spent three weeks a-building eyes fingers hurt have shot up precious stash red tissue am fighting warps inch way Put nasty cut thumb carving props buck knife sucker will probably terminally tail heavy wind up will Mercury Seven Flight Phoenix Wright brothers over again Chester Lanzo hope nice guy four years old Lanzo launched prototype creations six Korda wowed guys back East did know Gas gasoline nor heard Maxwell Bassett interim aeromodeler hordes bridged too-young-to-know period now recognize Golden Age Modeling hoarded glue duringthe scarcity WW II days Balsa diverted military purposes flew paper airplanes out barn top did lot pretending fly airplanes whatever sort interest fueled world events As 12year-olds volunteered painfully scratch out identification models school thrilled whenever stray Selfridge Field P-47 passed over Oh elliptical planforms fat undercambered ribs hundreds hunks fuselage funky wheels bamboo bits Wonders Oldenkamp What wrong people design weird difficult gizmos Thank God now Hot Stuff good wood real razor blades T-pins Celotex building boards like None begins explain still build difficult old models John thinks case Half Korda all-sheet exercise Ed MA plan No 125 $1 75 led chase through Zaic yearbooks looking perfect most-beautiful model first disap pointment course instant discovery Old-Timers featured complex multi-curved outlines dumb fat proportions etc people nuts least current standards Cranks masochists build OldTimers right Ever made Korda Wakefield John asks What winners fly same straight up slight right spiral low dip glide off somewhere usually much need dether malizer Unnerving Spectacular cabin jobs accidents design insofar aerodynamics concerned probably masterpieces romance lore Zaic yearbooks usually listed longest flight achieved particular model fre quently somewhere between 12 42 minutes Powerful binoculars days strong legs maybe chased Model As got job done built flew crashed know did exist art form very much worth effort duplication discovery preservation things once done recreation miasma long since committed various libraries touching process creation however arcane immense delight am digging up past lam basically refaniiliarizing myself moments disappeared over hill far too quickly rush puberty manhood Long live Chet Lanzo Long live rubberband Red airplanes hope curse assumes some time passed before Oldenkamp added PS about flight experiences Rambled off 375 miles Henderson NV over weekend VAMPS Las Vegas Antique Model Airplane Society Annual Nice folks Vast site warm buoyant air hardpacked shiny dirt crust underfoot Magnifi cent mount scarps Stayed funky casino just three miles Hoover Dam sharing space noise Lake Mead drag boat crew WeirdContinued page 135 August 1986 131 F-l5EagI 1/7 Scale Exceptional Performance True Byro-Jet Style. iake-off distance paved runway less 250 feet little practice nose high landings predictable F-iS climbs authority good steady rate has solid positive groovy responsive feel Engine out performance outstanding ight trim changes enable hands-off straight level flight no need land until youre ready Plus Byron F-i 5 offers unlimited scale possibilities its priced com petitively other twin engine jets comparable size E E PERFORMANCE Step-By-Step Instructions lete Rolled Plans rate Machine Die Cut Balsa Spruce Plywood ce Spars Launch Strength TH HAND LAUNCH E HI-START H 59 Span 15 Oz 2 channel 370 Sq Area computer Modified E-193 Airfoil DAVEY Eh1SYSTEMS mwm CORPORATION ONE WOOD LANE MALVERN PA 19355 215 644-6772 Plane Talk/Winter Continued page 131 Lanzos fly Trembling nerves withstanding model got assembled photo graphed loaded modest amount rubber45 grams modem stuff Dry whole model weighed mere 100 grams 300 tenuous turns beast off its maiden voyage stally putted around sorta right kinda up came down near cars dented shiny red prop Darn shouldnt make trim change time appeared ship needed right down thrust plus some weight up front cure stall Added Y16 shim taped quarter nose second flight went up smoothiy same turnsgoing nowhere looking safe turns Risking packed 900 Fortunately lit DT fuse model shot off rapidly climbed throughout entire prop run hooked boomer soon become speck red looked great Itwas up about 7mm landed sight half-mile downwind retrieved foot san dals plopping along dry lake surface certainly thrilled gave toast C Lanzo now know built ancient heap understanding era investigate trace mind handiwork greats build some trust perhaps methods gain perspective probably little respect aeromodeling rootsnot within awareness until now Hope can find red tissue China connection Joe Tschirgi remember tailless Giant Stik May column paid dues retired English teacher Ninjing taken lightly book experts love argue such stuff offers correction make no arguments Just read Subject statement March 1986 issue MA concerning flying planks heavily reflexed airfoil makes stable Facts 1 Airfoil camberpositive reflex inverted zerohas nothing static stability 2 Youre certainly alone belief 9999% knowledgeable modelers surprising number full-scale aero en glneers would agree ie think reflex airfoils have stable center pressure travel Explanation 1 Static pitch stability aircraft rate change pitching moment angle attack 2 conventional air foilsthick thin cambered symmetric re flex inverted flathave constant aerody namic moments usable angle attack range 3 purpose reflex camber tailless configuration provide nose-up moment like angular difference tailed aircraft trims vehicle usable lift co efficient 4 NACA NASAs predecessor habit presenting airfoil Center Pressure defined moment divided lift led misunder standing stopped publishing meaning less confusing data conjunction airfoils over 50 years ago 5 center lift Aerodynamic center AC lift curve slope airfoil section parameters have significant influence static stability Both essentially fixed values AC 25% chord Ct/a0 1 per degree identical very few percent airfoils ie AC does move angle attack Repeat Does move Proof 1 Take old Free Flight wing junk pile Mount stick fuselage big fixed vertical fin aft wing 2 Mount big flat plate drag area about 2i chord lengths above wing Required area depends wing camber the 10% wing good starting point 3 Balance thing 15-18% MAC try hand glide Use usual trimming procedures remem ber drag area same thing angular difference the 4 Youll find thing glides stably inefficiently Obviously least drag area combined aft CG can get away will produce best glide Years ago eminent engineer presented lecture DCRC Club significant number odd configurations model glider form would work among glider suggested Tschirgi Van Hattum retired Holland used similar examples including Joes teaching July-August 1973 issue Junior Modeler Van Hattum published fasci nating article including nine radicals three-views picture achieved Joes result merely using tail vertical square stick projecting aft end fuselage Article title Gliders Nine Going sublime ridiculous heres teaser dihedral Theres diagram dard explanation dihedral works armY longerthan armX lift results Y side plane returned normal flight B 1 plane anhedral stable Yes Consider Evans Desperado quite stable full-scale examples So B2 arm Y shorter arm X Now correct can example B2 stable Shouldnt roll out control Continued page 136 .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74 3 Pak$495 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit5395 P0 Box68132 AIRCRAFT CO Portland OR 97268 Ready Fly$795 Add $3 postage handling first 2 packages 10 additional DGA Designs 0 D0A00 DC Designs 0 0 0 Cs0 0 j C o5 0 0 QuarterMaster 1SPORT BIPE S QUARTER SCALE PLANS Quarter Master Sport Bipe8 1f Guadra 35. 73Spafl.EZ build. Great Flyer.Semi-Ki AvaIlable..PPO 0 DAVIS D-1K sOaSpan. 0 Ouadra 35 power Similar. PPO CC 91933 KINNER SPORTSTER 5Modet K.117Span 035 power pPo5 5 _ oCs 4-CYCLE PROJECTS AKRON FUNK 15 Scale 54 Span deeCs 4 cycle. FantaStic FlyerPPoeI ________0 DAVIS D1K* 603 Spar. cycleorsirnilar..rP051D Two Inch wale Sieth scale _____________0 Cs 1933 KINNER SPORTSTER88 Cs Model K.75 Span. el-75.4cy PPO$ I110 Photo reduced try, Id Scale Plans oro Inch scale SIxth scale ________0 00A Plane0 cowing C PHOTO DOCUMENTATION PACKS available- 0 Scale Plans ALL PLANS ROLLEDSHIPPED UPS Conpleteelnstroctien Booklet Send sl00 Catalog O New York State Residents add 7% sales tao. Send check J o MO Os. Allow 3weoks tOr cflecktocleer Cs mU m] j [Ci st 1986 135 IfyoushouldthinkofslipflOtethatB3 what youd see wing RC pilot OK know better say matter relative wind acting upon dihedraled wings banked turn inside wing has greater angle attack outside stabilizes fun Does centrifugal force play part location CGthat high low pendulum effect What does presence centrifugal force banked turn know nothing Dont ask offer C old-fashioned turn-and-bank indicator instrnment tilted would leftbanked turn slip skid yaw equalized pilot coordination ball cen tered skid greater ball would move toward right side slip greater ball sinks toward left side plane itself can center ball what modelers call spirally stable piloting input required neutrally-stable moreacrobatic craft machine man together still center ball ball will center design has some deficiency difficult fly unflyable Whimsy flat-winged Stik close hands-off FF flat-winged Lacey Fike will fly OK Air three-dimensional often think terms two dimensionslike diagram Drop wing aileron pull upelevator model whips around know wing loadings go sky high high some times small heavy models youll snap out control plane pushing agalnst alr toward outside turn its angle attack affected holding upelevator wing perhaps nearer stall large part due centrifugal force free-to-pivot pendulum hung beneath belly would point wonders about Frank Zaics book Circu lar Airflow available AMA Supply & Service Section wondered about airflow phenomenawith turn-and-banked aircraftmany years ago Ive models would fly themselves around 360add bit nose weight becomes 720 vice-versa until cant hold 360 Such models seemingly can fine-tuned go neutrally stable banked circles yet flying hands-off neither recover ing nor degrading continuous-banked turns Argue leave out dont know nuttinunless name Tschirgi Planes wonderful things Perhaps ought wonder Bill Winter 4432 Altura Ct. Faitfax VA 22030 Radio Technique/Myers Continued page 41 redundant RF link Roland Spicer fascinating person talk pursued dream setting RC cross-country record great care intelligence describes event enthusiasm would credit much younger man can see Roland airplane description flight RC Video Magazine Volume 3 plane scale model Wallace Beerys Bellanca dedicated Rolands lifetime friend Allison Buck can seen hanglng ceiling AMA museum AMA Headquarters building Reston VA Ask Hurst Bowers tell about case havent noticed better times interference- reliability-wise rnshing down us George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Aid/Edberg Continued page 43 forklift required four RC channels launcher required two platform up/down launcher release decided use single transmitter con trol both gadgets same time wouldnt need juggle transmitters running experiment decided use trusty Futaba J Series system needed least six channels available Because two receivers would inside vacuum chamber made 1-in-thick solid steel walls felt using J Series quite reasonable transmitter shown behind forklift shots way radio signals get through receivers inside chamber through small Plexiglas window concerned two receivers same fre quency might interfere other both RC systems performed flawlessly through testing As far know first time model RC system has operated vacuum two receivers sub jected share electrical noise motors powered both forklift resetting mechanism launcher noise did affect operation receivers made big racket FM receiver used gather data telemetry system later found out several companies manufacture brushless DC motors supposed operate vacuum out generating electrical noise Next time Im using vacuum Ill give try Both forklift launcher pow ered sealed lead-acid D cells having 4 Ah capacity huge batteries known safe operate vacuum recharged after days testing constant-voltage charger case forklift extra weight lead-acid cells helped provide extra traction driving around foam rubber However often quite enough made snow tires pushing staples facing outward through tires cured traction problem launcher forklift arrangement worked extremely well After bit practice became proficient enough two oould have specimen back top launcher within 2 minutes may seem long time until consider specimen bounces ran domly foam-rubber-covered floor takes 90 seconds just recycle launcher case much less time 20 minutes needed recycle vacuum chamber wont go details results testing because really terest people field space craft dynamics will say results good enough Stanford award 136 Model Aviation Eke. Quality r S 937 x 156 x 175 18 oz 46 oz torque Years development have produced finest state-ofthe art receivers ever made Flight tests over country haveThe workhorse Ace servos Perfect Patternships Quarter Scale Boats Cars proven receiver will fly others fail Solid glitch-freeapplication high power required performance air plane attitude frequencies/channelsLIIIIIJ 14G20AAtlas Servo Kit$2395 Available Z7 50 53 72 75mHzAC 14G2OACAtlas Servo assembled$3146 12G70 Silver Seven Receiver Kit$3895 Available dealer order direct add $200 Ace RIC 116W 19th St Box SuB Higginsville MO 64037 816 584-721