FRIDAY MORNINGS lot better Mondays especially after exhil arating evenings flying modified 2/2l Leisure LR5O-powered model cabin configuration make com parisons Parasols have minor draw back especially use high pretty tail can understand consider Pattern jobs have high forward profile assist knife-edge flight put parasol banked turn go hands-off tends tighten turn un corrected begins go spiral dive requires opposite rudder twoand three-channel jobs sup posed have FF-like good gliding abili ty cabin configuration case reduces need use rudder stay hands-off once trimmed circle lift found old FF tricksthat 1fting airfoiled stab well aft CG nice things Climb does appear steep crate just seeming rise until attains high altitudes thought knew about lifting tails Oh yeah honest 9-1 0-mmminimum crate lifeless evening warm-air evenings sunny dura tion 13 mm thermals CG come out parasol 35% chord obviously too far forward big airfoiled stab anybody would settle excellent performance Climb-out analogous Cub Champ both have best rate climb 65 hp 60 mph light planes reduced power youd have retrim higher airspeed best-climb rate new power setting Electric does same thing goes power plateau gradually remove slight up-trim Since crate handles like light plane chop power Jomar propor tional throttle Joe Utasi naturally up-trim required best glide Ele vators gentle Glide duration 45% power run time takes get max altitude Now having moved 250 rnAh re ceiver pack back 1 perfect CG lifting tail 40% 1-deg angular difference first tried 1/16 shim under wing LE increase difference High up crate appeared float slow ly power off duration off 30 sec less sink probably better L/D ratio used full-up for20 Model Aviation U jUSt fun Bill Winter Left Charles Bentson featured column flew fin-mounted Cox 02-powered 54-in-span glider International Veteran Glider Meet fun along Martin Simonswhose book Bill Winter talks about meet storied Wasserkuppe gliding began flourish after 1914-iS war cloudy gusty misty rain late day Simons talked Bentson down after 20 minutes Bentsons fogged glasses forced him go instruments Right Bentsons lovely flying wing glider Use reflexed NACA 23012 eirfpil gives stability spite rectangular no-sweep wing text Bentson adds discussion effects ailerons Please meet old friend Bill Winters New Zealand Bill Mackley 50-year-plus self-designed Free Flight two met Kingston Ont Canada Mackley instruct ing RAF pilots 1-larvards after bomber tour over Europe Mackley now retired after lifetime civil aviation visits Washington DC behalf Flight Safety Foundation model refurbished bright red blue yellow Solarfilm since original bamboo paper wss tatters Baby Cyclone engine still usable tank spark coil missing Winter published picture plane September 1942 issue Air Trails magazine Mackley now installing RC electric power Time marches ward CG although CG moved back crate almost entirely handsofftakeoffs 15-20 ft needing no controls will drop prop pitch 7 7 li-in diameter hopefully faster climb less current consump tion longer runs shut off 5 max 6 mm order have power dragging approaches possible gorounds want keep realistic light-plane piloting technique man thats fun favor trim power l0und tfle ratters oy lius MunIcn tnis Geodetic Galaxie 300 FF 20 years ago Mills 045 diesel Its now converted Leisure LT5O electric power six motor cells Cannon micros elevator rudder weighs 31 oz props 9-7 Torna gets li-mm flights 10-mm motor battery charge Joy fly gentle forgiving great glide says Gus reports Elec tric flying proliferating Long Island Playboys Winters recent tip East Islipchange Westl Winter says really didnt design oncepopular FF previous Air Trails magazine article averaged dimensions areas etc numerous FFs Americas greatest fliers American averagewith precise area used Denny Davis sensa tional Class Hogan Sal Taibi recalls being beaten Indianapolis Junior beginner took first Old-timers will interested full-size detailed plan Class AB version being sold $350 pIus 65 cents postage SAMs Bob Larsh 45 South Whitcomb Ave Indianapolis IN 46241 Arden 19-size three-view based Winter opines vertical tail looks too big now Anyway stood threepoint ROGing single wheel some up-trim -for power off Al though Don Srulls magnificent Electric Sparky flies greater authority spectacular much sur prised find four flights both ships alternating came up four identical flight times Yesterdays flying proved 7-in pitch gets altitude 7-in pitch too much just barely both cases / - 7 4LL AMER/CAN Designed BILL WINTER WINGSPAN 54 WING AREA384 SQ STA6ILlZER 385% MOMENT ARM 39% POWERARDEN 199 L L L L L WF7II-----I-- I I I II NOTE MODEL FEATURED IMPLE 1/8 KEEL FUSELAGE WITH I/B BOTTOM FROM AIR TRAILS CIRCA 1948/49 liii LF C --7 --7 L 1 L L L LLL- ES 0 2 3 4 5 6 7 8 10 1214 16hid Balsa USA Taube modified Larry Hill Pine Barons MAC New Jersey has nice Stand-Off Scale look scalloped trail ing edges surfaces added ailerons covered fuselage back TE 1/64 plywood adding glue rivets painted ply silver Dummied six-cylinder water-cooled engine radiators added top bottom kingposts flying wires wing tail Antique Coy erite Fuselage fin rudder sprayed Krylon 2504 beige hide balsa grain Has OS Max 35 turns 10-5 2-oz prop nut balance flew right off no trim changes has scalelike speed very satisfying project says Larry 0 October 1983 21 GUSTAVE WHITEHEADHERO OR HOAX Thanks recent article Don Berliner American Modeler magazine article William ODwyer 1968 modelers aware Whitehead may have flown 1901 Whitehead affair described some hoax print Ger man immigrant pictured virtual nobody Whitehead nobody respected peers press day found Page newspa pers international magazines articles about Whitehead have appeared through yearsyet virtually no history today mentions him controversial photo has surfaced part presumed van ished photo collection Hoax implies conspiracy Yet 14 witnesses flights found over genera tion research signed affidavits obviously could have consorted Some taped old age Included big-city newspaper editor banker wrote experience 1953 contract between Smithsonian Institution Wright estate compromises Institution relative publication early materials purport question Wrights ing first fly traces back long-ago claims Smithsonian Lang ley flown first No dreamt Whitehead would surface years later ODwyer after Stella Randolph came upon Whitehead artifacts early 30s has spent 20 years $50000 research cru sadehe has six legal-sized cabinets infor mation matched Gustave Whitehead Museum Germany ODwyer has invited Smithsonian examine files German Readers Digest corporate associate American Readers Digest has published book about worlds greatest inventors past 100 years five separate references Whitehead Collec tors will interested block stamps issued German post office bear planform Whitehead machine Whitehead American citizen Since may able read fine print stamps lines bottom read Gus tav Weiskopf 1481901 Karlo Jatho 188 1903 Gebr Wright 17121903 other photos show front back monu ment stands front Whitehead Museum Leutershausen Germany Carl Jatho August 18 1903 flew 581 sq ft biplane 9%-hp engine 59 ft altitude 2% ft Rede signed monoplane 387% sq ft handle wind autumn 1903 attained 196 ft height 11 ft flights did equate Wrights flight certain respects claimed Father Flight Guinness Book Air 7P4 03 ~ an post offices special issue Gustave Whitehead stamps above front back Whitehead monument below Whitehead Museum Leuterhausen Germany Facts Feats specifically lists successful flights still earlier birdmen People getting off groundthat history no mention Whitehead difference between Whiteheads ma chine other early-day contenders except ing Wrights described steerable claimed 1901 flight both sustained steered Whether Whitehead flights ever accepted requiring neutral evaluation bodya respect history requires Whitehead paid due effective anhi-Whitehead written statement out past shows three distinct handwritings signed near future international annual award program will begin under German spon sorshipalong lines Nobel program special awards people high achievement perhaps dozen categories including modeling have already asked yearly nominations five outstanding American modelers Old Gus might aviations Man Iron Mask Bill Winter bad news good news guys using foreign plastic folding props ones tried de cided pathetic Theres break through props least certain kinds mod el will double perhaps triple altitude several excursions pinpoint durationwith spectacular increases rate climb speed length motor run imagine stuff will published soon Back drawing board fellows weather scared off mob just Mad Test Pilot treat ing K&B 60-powered Schlepp POWR young fellow writ ten about some months backlets just call him Brad So made first test hop Jayhawk RTF keep mut tering about Kadet last year two sad OS 35sthe Kadet ended up K&B 40 35s badly beaten varnished works 35 came life smoothed out remarkably after POWR treatment sold Mad Test Pilot little RTF treated engine flew right off proving fast 40 Kadet propped Master Airscrew 9-6 looped rolled inverted wingoveredall first try underestimated ailerons Continued page 24 22 Model Aviation New Specials S795 Look Squadron/Signal Display ALL better Hobby Shops Book Stores favorite Hobby Shop Bookstore does carry Squadron/Signal books send S50 postage & handling Name Address us FREE Squadron/Signal catalog names distributors carry books Squadron/Signal Publication Dept SP2 1115 Crowley Dr Carroilton Tx 75011-5010 set up too much throw Jayhawk almost rolled first correction Max stick movement 1/8 come across things ignore strange aileron installation always cut hole through skin foam lined thin plywood epoxied servo rails front back box Maybe am vamped think RTFs fun would consider aileron trainer Its lively course am Young Brad Midwest Stik also flew LR50 electric-powered Drifter II no gearbut takes off does touch-and-goes has wire skid/strut under forward belly Stik has OS 50 12-oz tank will disappear climbing straight up like spectacular exits published Phil Krafts Stik Grid Leaks early 1960s al ways thought worlds ugliest airplane Some people hate Stiks like some Rubber Scale modelers detest Laceys like Lacey cannot beat Stik flying ability may greatest all-around free-style aerobatics machine ever concocted does things flat wing beyond What things Well hands-off flying young Brad try things Up down field went touch control ex cept turn around although finally would begin vear off its heading Slow flight almost standstill rolls like energetic puppy Brad does intentional flat spins sometimes occur crates aft balance pointand usually cannot recover chap begins regu lar spin slowly feeds opposite aileron Slowly goes flat after pinwheeling perhaps 20 times re laxes control darn thing comes out after five revolutions can blast out rudder control spin slow approach turbulent air keeps pilot busy good air speed can grease in gale must getting old could enjoy building easy flying crate once detested Hang-ups cheat Well top off Mad Test Pilot tore up place Sig Kavalier HP 40 Two years shenanigans unscratched Both crates outer limits joke about re flexes eye perception goes firstlike waiting signals outer space Another strange evening clouds winds odd mix crates some wonderful flying Saturday morning Let see search handle long disserta tion about ailerons RC jobs recent issue seems have accessed everybodys houshold Apple particu larly fine letter Charles W Bentson Continued page 26 24 Model Aviation 6156 Tne Eawrern F-roflf Astounding plastics.. discrir Either Pilotkit.. Sportsman barnstormer.. *Darn Good Airmen.. complete iiflIMAA eSatNYS Residents add 7% Sales tax APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE WHEEIS CONTROLUNEFREE-FLIGHT 000 VINTAGESMOOTHGOLDEN AGENEW sizes2l/CONTOURsIzes21/2BALLOON 3/a3423/i 343 133413/4 1342/z41/2 1144%14 33411/4 43/i31451/4 114511441/211453 1/a6/a2145141/a6 EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL Los Angeles sheds much-needed illumination support statements enclosed copies few pages mysterious book loaded what first glance seemed just erudite mysteries math over whelming diagrams wondered could decipher fine print Strangely books author seemed talking about models much real-plane long-hair stuff obviously knew score gosh reading things didnt know hooked asked Bentson what book pages came fromand chance something published Ill tell about book think masterpiece Ive read over over am still lets pick up some what Bentson say true modelers dont understand effects ailerons low-speed flight Charles began comments washin FF models especially interesting order find some answers took out Martin Si mons Model Aircraft Aerodynamics Argus Books Ltd 14 St James Rd Watford Herts England Editor may obtain book Zenith Avi ation Books PO Box 1/MA Osceola WI 54020 price $2295 item No 16061B big difference way ailerons act depending whether wing straight tapered since tips straight constant chord wing tend fly zero aerodynamic inci dence experience has tapered wings probably needed bit washout didnt have hence trimming ailerons bit up produced effect washout greatly improved low-speed handling Author As said earlier comments slight up-aileron neutral can helpnot Pattern other all-out aerobatics machines typical sport jobs like Kadet has re flexed ailerons per Claude McCulloughs Sig advice have flaps permit ting drag slightly increases angle attack inner wing compared tips gives washed-out tip effect Bentson tement down-aileron does work misleading t Martins book - indicates up-aileron has nearly equal effect down-aileron curves further indicate beyond 1 5-deg range aileron begins act like spoiler may OK up side certainly down side 2 ratio sounds good Author While knowing up-ai leron does some work always assumed work performed down-aileronen visioning down-aileron creating deep camber high CL portion wing up-aileron reflexed camber Perhaps got 26 Model Aviation SCALE RADIO CONTROL SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS JLLLAI5SEND $1 FOR COMPLETE IUUSTRATED CATALOG EROS MA PAWNEE ST SAN MARCOS CA 9 SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013513 738-1576 Catalog Twelve page-Fully Illustrated complete details . MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC carried away Julius Irving flies higher ballerina lends magic Sixers Moses Malone also shakes up enemy troops 2 ratio refers amount up-move ment aileron equate drag down-aileron turn movements equal demands far larger vertical tail overcome down-aileron yaw plane will turn bank ratIer skew around its vertical axis may able use differen tial throws narrow strip ailerons would require ridiculous amount up compensate down-aileron large throws re quired suggests wider ailerons less movement encourage differ ential linkages proof moreup-than-down thing consider Ercoupe early models using 21 aileron differential limited rudder movement Fred Weick de signer sought prevent amateurs overly crossing controls dreaded downwind turns Because virtually old real planes ignored differential lots rud der used along ailerons pilots know about coordination days fliers Giant Scale models insist fly smoothly must coordi nate ailerons rudder use CAR transmitter mode differential being scarce hens teeth early Ercoupe no rudder barit CAR Bentson Alan Slater 85 still active aviation journalist once told about glider pilot 1 920s mistakenly assumed down-aileron did work eliminated opposite upward action went spiral dive overed difficulty go another resulted death Author Charles isnt trying prove something merely relating strange incident stress point dont know circumstances Shallow no dihedral inadequate vertical tail etc establishes down-aileron yaw could controlled tail rudder response poor man doomed such experiment oversized vertical tail would essential would sufficient dihedral powerful rudder could couple aerody namically opposite rolling mo ment three-channel RC picture Eaglet slight washin warp say right tip produces left turn aileron tip warp removed would produce same turn amount down-aile ron corresponded increased lift generated slightly warped tip As tricky standing headon top flagpole Yes agree up-aile ron does almost much work down-aileron Continued page 28 HB ENGINES 21 Grand Prix SCHNEURLE PORTED B C LETS TALK REAL POWER 105 HP @24000 RPM powerful 21 engine H B has produced date flexible engine ever designed. cylinder head can rotated position exhaust stack Rear Left Right GREAT CHOICE FOR FAN JETS Send Si 00 H B Patch Technical Information IIGENES BAVARIAN PRECISION PRODUCTS CO P0 Box 6 Dept E 22 East Avenue canaan connecticut 06840 WHY SETTLE FOR LESS can have Performance/conomy 15x 6 18x 6- 8 10 __________20x 6-8- 10 __ _________22x 81O $1800 Prices include UPS charges D MASTER CHARGE DVISA DCOD DOHECK DMONEY ORDER Dealers / DIstrIbutors Invited ___ DYNATHRUST PROPS INO 2541 NE lith Court Pompano Beach FL 33062 13059419119 Dynathrusts composite construction provides Unequaled Durability Saves money 100% accurate pitch results Outstanding Performance Air Counts October 1983 27 EXHAUST TO THE RIGHT EXHAUST TO THE LEFT s70O $1000 s140O Bring MonoKate classroom right own TV. Top Elites hour MonoKote Video Tape simple flat surfaces fillets hinges Top Elites video tape teaches basic Monokoting skills Learn right own home. per fect club showings too Purchase $3995 rented return within 30 days $2000 refund VHS BETA format available order receives valuable coupon worth up $7560 off list price 12 six foot rolls MonoKote Top Elite. helping step way Send check money order $3995 name full address choice VHS BETA format rOPFUTE MODELS INC TMonoKote Video Tape Otter 1901 N Narragansett Ave Chicago IL 60639 U 213 764-1490 CakQiC qgg IESN 13400-26 Saticoy Streel North Hollywood Calif 91605 UHEAVY DUTYSPECIAL 825I 4-IN SANDERDELUXE SYSTEM F Flit Adjustable table 101 oz HMiter guideU W4Ch letetm $100 101with metal Tx 4 Sand discs1 $300Nicods Chgr 1 3 CASH$2l95$27495 Ship$ 350CASH $15995 PBuI3inkAIR CAPITAL MODELS Ship $ 650 Lifetime SandingReady-ToFlylFB 100 Tools Grit brazedLess Radio EngineU steel Flat type 11/2 xIgSpan radius type 1 x 9 Giant Schoolyard Model Ship Ig 3/4 radius Span 46 049 061$10504061 Engine Both have coarse &engine350sqinchesReg $17995 CASH $139951 fine grits Sf8 peciy. 2-3 CH RadioShip$2500mu Reg $695 Reg $3995$400OR4VIS4 CASH $495 $2597 MORE L Catalog 75 $200 Foreign Add Calif Sales Tax CASH price shown Cards 5% higher 28 Model Aviation Bentson I experience drastically retrimming ailerons fullscale glider 1935 Rhonbuzzard restored ailerons modified half original length well-known sailplane designer However British Gliding Association test panel would test approve because origi nal aileron travel available permit fly set about find safe solution experience large RC models indicated aile ron differentials about 3 actually im proved aileron response look Schleicher K-l 8 best ailerons fleet simi lar differential retrimmed Rhonbuzzard originally-specified up ward deflection considerably red duced down travelabout 2 1 honor testing machine nearly age flown 12 years delight fly much responsive vintage gliders fitted 100-in Monterey Sail plane trailing edge ailerons along inner two-thirds wing panel Movement limited upward Aileron control crisp fast rate roll strongly recommend arrangement Author I just learned something seem have new toy Bentson I used different approach 11-ft RC Sailplane bought dirt-cheap because handled badly roll Author Charles somethingthe guy ever buy model because flew poorly conventional ailerons readjusted give some good differential rigging rest position five degrees up good handling restored able dispense over sized rudder fit much smaller rudder correct spiral sta bility Author rye just read times Unless requirements neutrally-stable alrplane probably symmetrical section Bentson just said mouthful As hacker think per ceive getting roll control out up-aileron has some down remaining net re sult has achieved differential using traditional methodsyes course could get rid oversized vertical tail have smoother-flying machine Reading book sent think means has less center-of-pressure travel much stable machine about axes earlier stall point though good fliers dont get near stall what paid get good things achieved probably immateri al learn less know did come out Chi nese fortune cookie Bentson You mentioned prob Continued page 128 r N WIN session 4-leA SPORT WINCH LightweIght 34 lbs 155kg battery Surprising performance r develops g HP Reliable & durable ity components Easy use stable electrodynamic brake help prevent backlashe Complete around parachute 600 meters go lb braided nylon line $21500 battery shipping charges included also sell finest 160 lb braided nylon contest towline $lg201600 meters plus shipping Send complete descriptive literature price list 68 Morgan Ave Danbury CT 06810 TEL203 743-3312 FASTEN YOUR SEA TBELTS! .ATTYOU CROSS THE THRESHOLD TO THE BLUE ANGELS EX PERIENCE YOU CAN NOW THRILL TO THE REAL LIFE ADVENTURE WITH SIX DARING MEN AND THEIR FLYING MACHINES SIT IN FRONT ROW COCKPIT AND SENSE THE EMOTIONS AND EXTREME CONCEN TRATION AS YOUR DOUGLAS F-4J PHANTOM GOES THROUGH ITS PACES WITH 32000 POUNDS OF THRUST TO TOP SPEED OF 1600 MPH! FULL COLOR VIDEO WITH NAR RATION AND ACTUAL SOUNDS MUSIC BY FRED MYROW 1/2 VHS D V2 Beta 1 El 1/2 Beta2 El 46 mm VIDEO $6500 K 89 min$8500 El Shipping $250 ea lilust Info Pkg $200 El refundable purchase VISA El MASTERCHARGE El Number_________ date_______ N moo _________StateZip AUDIO VISUALS INTERNATIONAL PO BOX 1390 WOODLAND WASHINGTON 98674 Nick Zirolis F4U CORSAIR 2 Cu size Engines Fibergiass Fuse age & Cowlieg aua able fur lee O5SiQC GIANT RIC SCALE PLAN DESIGNS AT6 TEXAN24 I101Span52700ppUSA POKKER DR27163Tripe$2000ppUSA PAP REARCAT2 186Span$2700ppUSA CURTISS P402 194Span$2700ppUSA FAU CORSAIR2Y 193Span$2700ppUSA Fiberglass Cowliegs & Canopies available ase Send sramp aelaileg urusnures Giaer Scale Accessurius Oar Fans seer Fusfpaid arilbin UgAl last item leave also con cerns Sailpianes sort came form short note photograph Dale Willoughby will know has vast collection documentation photographs Scale modelers available Scale Model Research Orange CA As can seen accompanying photograph subject Dales story electric-powered Sailplane-like model being launched recent US/International F3E Challenge com petition photo taken moment wind gust caused model twist launcher Dale Blacks hand Dale member Harbor Soaring Society long-time RC Sailplane Ilier momentarily forgot model whirling prop its nose quick grab straighten twisting model resulted some nasty cuts left hand Moral Dont grab business end F3E Have safe month John Preston 7012 Elvira Cr Falls Church VA 22042 Fun/Winter Continued page 28 lems inadequately-sized vertical tail area old designs Author case full-scale old-timers am great believer sticking orig inal scale size compensating providing thicker effective sec tion Most modelers completely ignore aerodynamics come tail cut out sheet material cause comparatively small size tail surfaces models need especial attention section used sug gestion square trailing edge good Author talking model aile rons flutterpointed control sur face edges probablyand Joe Bridis constant-thickness ailerons trainers Author I half-buy However smaller model tougher stick scale tail areas time get 1/5-scale larger ability hold hold scale size penal ty becomes increasingly greater de part scale airfoils resort freely flat-bottomed ones Especially thick have serious CP travel increasing angles attack thus require larger tail area symmetrical semi-symmetri cal some other scale section used first case because mon keying around might need 30% stab latter less 20% 15% less ship least 4/2 5 ft span long fuselage arm 10% would feasible some cases talk full-scale powerplane experience glider experience scanty have noted RC models sectioned stabs streamlined double-triangles end-to-end ribs fly better sheet-tailed crates dont have foggiest reason respected pilots say true Bentson Perhaps best argument upward-rigged ailerons comes modern sailplanes camber-changing flaps ailerons arranged move up down flaps Although would preferable take off aerotow flaps slightly down common practice take off least initiate takeoff run flaps up cause better aileron control obtained less likelihood wing tip touching ground case aile ron drag factor because tow attachment nose Humor guys because game plan column has gone up smoke Old-timer modelers Indoors Sailplanes FF Power etc have dozens years hands-on experience better Rubber Scalersand Wakefielders Nordic guys think Tweakers Breathers fine tuning crates seems stream consciousness us books articles aerodynamics appear written folks weve never met greater man able communicate matters far beyond us simple understandable wayand truths revealed witnessed TV worlds greatest musicians con duct Masters Classescelloist Casals exampleyou mesmerized ability true geniuses touch gestures simple words humblest student dare say Ein stein field Dr Lippisch could convey over coffee glimpse im ponderables unattainable lifetime reading Having nothing prove great teachers dont blow us away avalanches math gobbledygook contrived impress peers close loopholes criticism other elitists talking During early 1930s once sat up night reading small book aero dynamics explained airplane flew basics stability factors propeller design designer went about buildingblock process based rudimentary things probably way people like Bellanca Fokker etc wrought magic simple book seemed like Christmas Future So humble author George Page greatest designers age man produced miracles Curtiss years before war Youll never see book like again alas read About Size January 1978 Model Aviation Brad Powers experienced vision basic relationships Powers long re tired few readers knew renowned project engineer Convair participated long string re markable aircraft Somewhat like Page compressed universe rare 128 Model Aviation briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft
Edition: Model Aviation - 1983/10
Page Numbers: 20, 21, 22, 24, 26, 27, 28, 128, 129
FRIDAY MORNINGS lot better Mondays especially after exhil arating evenings flying modified 2/2l Leisure LR5O-powered model cabin configuration make com parisons Parasols have minor draw back especially use high pretty tail can understand consider Pattern jobs have high forward profile assist knife-edge flight put parasol banked turn go hands-off tends tighten turn un corrected begins go spiral dive requires opposite rudder twoand three-channel jobs sup posed have FF-like good gliding abili ty cabin configuration case reduces need use rudder stay hands-off once trimmed circle lift found old FF tricksthat 1fting airfoiled stab well aft CG nice things Climb does appear steep crate just seeming rise until attains high altitudes thought knew about lifting tails Oh yeah honest 9-1 0-mmminimum crate lifeless evening warm-air evenings sunny dura tion 13 mm thermals CG come out parasol 35% chord obviously too far forward big airfoiled stab anybody would settle excellent performance Climb-out analogous Cub Champ both have best rate climb 65 hp 60 mph light planes reduced power youd have retrim higher airspeed best-climb rate new power setting Electric does same thing goes power plateau gradually remove slight up-trim Since crate handles like light plane chop power Jomar propor tional throttle Joe Utasi naturally up-trim required best glide Ele vators gentle Glide duration 45% power run time takes get max altitude Now having moved 250 rnAh re ceiver pack back 1 perfect CG lifting tail 40% 1-deg angular difference first tried 1/16 shim under wing LE increase difference High up crate appeared float slow ly power off duration off 30 sec less sink probably better L/D ratio used full-up for20 Model Aviation U jUSt fun Bill Winter Left Charles Bentson featured column flew fin-mounted Cox 02-powered 54-in-span glider International Veteran Glider Meet fun along Martin Simonswhose book Bill Winter talks about meet storied Wasserkuppe gliding began flourish after 1914-iS war cloudy gusty misty rain late day Simons talked Bentson down after 20 minutes Bentsons fogged glasses forced him go instruments Right Bentsons lovely flying wing glider Use reflexed NACA 23012 eirfpil gives stability spite rectangular no-sweep wing text Bentson adds discussion effects ailerons Please meet old friend Bill Winters New Zealand Bill Mackley 50-year-plus self-designed Free Flight two met Kingston Ont Canada Mackley instruct ing RAF pilots 1-larvards after bomber tour over Europe Mackley now retired after lifetime civil aviation visits Washington DC behalf Flight Safety Foundation model refurbished bright red blue yellow Solarfilm since original bamboo paper wss tatters Baby Cyclone engine still usable tank spark coil missing Winter published picture plane September 1942 issue Air Trails magazine Mackley now installing RC electric power Time marches ward CG although CG moved back crate almost entirely handsofftakeoffs 15-20 ft needing no controls will drop prop pitch 7 7 li-in diameter hopefully faster climb less current consump tion longer runs shut off 5 max 6 mm order have power dragging approaches possible gorounds want keep realistic light-plane piloting technique man thats fun favor trim power l0und tfle ratters oy lius MunIcn tnis Geodetic Galaxie 300 FF 20 years ago Mills 045 diesel Its now converted Leisure LT5O electric power six motor cells Cannon micros elevator rudder weighs 31 oz props 9-7 Torna gets li-mm flights 10-mm motor battery charge Joy fly gentle forgiving great glide says Gus reports Elec tric flying proliferating Long Island Playboys Winters recent tip East Islipchange Westl Winter says really didnt design oncepopular FF previous Air Trails magazine article averaged dimensions areas etc numerous FFs Americas greatest fliers American averagewith precise area used Denny Davis sensa tional Class Hogan Sal Taibi recalls being beaten Indianapolis Junior beginner took first Old-timers will interested full-size detailed plan Class AB version being sold $350 pIus 65 cents postage SAMs Bob Larsh 45 South Whitcomb Ave Indianapolis IN 46241 Arden 19-size three-view based Winter opines vertical tail looks too big now Anyway stood threepoint ROGing single wheel some up-trim -for power off Al though Don Srulls magnificent Electric Sparky flies greater authority spectacular much sur prised find four flights both ships alternating came up four identical flight times Yesterdays flying proved 7-in pitch gets altitude 7-in pitch too much just barely both cases / - 7 4LL AMER/CAN Designed BILL WINTER WINGSPAN 54 WING AREA384 SQ STA6ILlZER 385% MOMENT ARM 39% POWERARDEN 199 L L L L L WF7II-----I-- I I I II NOTE MODEL FEATURED IMPLE 1/8 KEEL FUSELAGE WITH I/B BOTTOM FROM AIR TRAILS CIRCA 1948/49 liii LF C --7 --7 L 1 L L L LLL- ES 0 2 3 4 5 6 7 8 10 1214 16hid Balsa USA Taube modified Larry Hill Pine Barons MAC New Jersey has nice Stand-Off Scale look scalloped trail ing edges surfaces added ailerons covered fuselage back TE 1/64 plywood adding glue rivets painted ply silver Dummied six-cylinder water-cooled engine radiators added top bottom kingposts flying wires wing tail Antique Coy erite Fuselage fin rudder sprayed Krylon 2504 beige hide balsa grain Has OS Max 35 turns 10-5 2-oz prop nut balance flew right off no trim changes has scalelike speed very satisfying project says Larry 0 October 1983 21 GUSTAVE WHITEHEADHERO OR HOAX Thanks recent article Don Berliner American Modeler magazine article William ODwyer 1968 modelers aware Whitehead may have flown 1901 Whitehead affair described some hoax print Ger man immigrant pictured virtual nobody Whitehead nobody respected peers press day found Page newspa pers international magazines articles about Whitehead have appeared through yearsyet virtually no history today mentions him controversial photo has surfaced part presumed van ished photo collection Hoax implies conspiracy Yet 14 witnesses flights found over genera tion research signed affidavits obviously could have consorted Some taped old age Included big-city newspaper editor banker wrote experience 1953 contract between Smithsonian Institution Wright estate compromises Institution relative publication early materials purport question Wrights ing first fly traces back long-ago claims Smithsonian Lang ley flown first No dreamt Whitehead would surface years later ODwyer after Stella Randolph came upon Whitehead artifacts early 30s has spent 20 years $50000 research cru sadehe has six legal-sized cabinets infor mation matched Gustave Whitehead Museum Germany ODwyer has invited Smithsonian examine files German Readers Digest corporate associate American Readers Digest has published book about worlds greatest inventors past 100 years five separate references Whitehead Collec tors will interested block stamps issued German post office bear planform Whitehead machine Whitehead American citizen Since may able read fine print stamps lines bottom read Gus tav Weiskopf 1481901 Karlo Jatho 188 1903 Gebr Wright 17121903 other photos show front back monu ment stands front Whitehead Museum Leutershausen Germany Carl Jatho August 18 1903 flew 581 sq ft biplane 9%-hp engine 59 ft altitude 2% ft Rede signed monoplane 387% sq ft handle wind autumn 1903 attained 196 ft height 11 ft flights did equate Wrights flight certain respects claimed Father Flight Guinness Book Air 7P4 03 ~ an post offices special issue Gustave Whitehead stamps above front back Whitehead monument below Whitehead Museum Leuterhausen Germany Facts Feats specifically lists successful flights still earlier birdmen People getting off groundthat history no mention Whitehead difference between Whiteheads ma chine other early-day contenders except ing Wrights described steerable claimed 1901 flight both sustained steered Whether Whitehead flights ever accepted requiring neutral evaluation bodya respect history requires Whitehead paid due effective anhi-Whitehead written statement out past shows three distinct handwritings signed near future international annual award program will begin under German spon sorshipalong lines Nobel program special awards people high achievement perhaps dozen categories including modeling have already asked yearly nominations five outstanding American modelers Old Gus might aviations Man Iron Mask Bill Winter bad news good news guys using foreign plastic folding props ones tried de cided pathetic Theres break through props least certain kinds mod el will double perhaps triple altitude several excursions pinpoint durationwith spectacular increases rate climb speed length motor run imagine stuff will published soon Back drawing board fellows weather scared off mob just Mad Test Pilot treat ing K&B 60-powered Schlepp POWR young fellow writ ten about some months backlets just call him Brad So made first test hop Jayhawk RTF keep mut tering about Kadet last year two sad OS 35sthe Kadet ended up K&B 40 35s badly beaten varnished works 35 came life smoothed out remarkably after POWR treatment sold Mad Test Pilot little RTF treated engine flew right off proving fast 40 Kadet propped Master Airscrew 9-6 looped rolled inverted wingoveredall first try underestimated ailerons Continued page 24 22 Model Aviation New Specials S795 Look Squadron/Signal Display ALL better Hobby Shops Book Stores favorite Hobby Shop Bookstore does carry Squadron/Signal books send S50 postage & handling Name Address us FREE Squadron/Signal catalog names distributors carry books Squadron/Signal Publication Dept SP2 1115 Crowley Dr Carroilton Tx 75011-5010 set up too much throw Jayhawk almost rolled first correction Max stick movement 1/8 come across things ignore strange aileron installation always cut hole through skin foam lined thin plywood epoxied servo rails front back box Maybe am vamped think RTFs fun would consider aileron trainer Its lively course am Young Brad Midwest Stik also flew LR50 electric-powered Drifter II no gearbut takes off does touch-and-goes has wire skid/strut under forward belly Stik has OS 50 12-oz tank will disappear climbing straight up like spectacular exits published Phil Krafts Stik Grid Leaks early 1960s al ways thought worlds ugliest airplane Some people hate Stiks like some Rubber Scale modelers detest Laceys like Lacey cannot beat Stik flying ability may greatest all-around free-style aerobatics machine ever concocted does things flat wing beyond What things Well hands-off flying young Brad try things Up down field went touch control ex cept turn around although finally would begin vear off its heading Slow flight almost standstill rolls like energetic puppy Brad does intentional flat spins sometimes occur crates aft balance pointand usually cannot recover chap begins regu lar spin slowly feeds opposite aileron Slowly goes flat after pinwheeling perhaps 20 times re laxes control darn thing comes out after five revolutions can blast out rudder control spin slow approach turbulent air keeps pilot busy good air speed can grease in gale must getting old could enjoy building easy flying crate once detested Hang-ups cheat Well top off Mad Test Pilot tore up place Sig Kavalier HP 40 Two years shenanigans unscratched Both crates outer limits joke about re flexes eye perception goes firstlike waiting signals outer space Another strange evening clouds winds odd mix crates some wonderful flying Saturday morning Let see search handle long disserta tion about ailerons RC jobs recent issue seems have accessed everybodys houshold Apple particu larly fine letter Charles W Bentson Continued page 26 24 Model Aviation 6156 Tne Eawrern F-roflf Astounding plastics.. discrir Either Pilotkit.. Sportsman barnstormer.. *Darn Good Airmen.. complete iiflIMAA eSatNYS Residents add 7% Sales tax APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE WHEEIS CONTROLUNEFREE-FLIGHT 000 VINTAGESMOOTHGOLDEN AGENEW sizes2l/CONTOURsIzes21/2BALLOON 3/a3423/i 343 133413/4 1342/z41/2 1144%14 33411/4 43/i31451/4 114511441/211453 1/a6/a2145141/a6 EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL Los Angeles sheds much-needed illumination support statements enclosed copies few pages mysterious book loaded what first glance seemed just erudite mysteries math over whelming diagrams wondered could decipher fine print Strangely books author seemed talking about models much real-plane long-hair stuff obviously knew score gosh reading things didnt know hooked asked Bentson what book pages came fromand chance something published Ill tell about book think masterpiece Ive read over over am still lets pick up some what Bentson say true modelers dont understand effects ailerons low-speed flight Charles began comments washin FF models especially interesting order find some answers took out Martin Si mons Model Aircraft Aerodynamics Argus Books Ltd 14 St James Rd Watford Herts England Editor may obtain book Zenith Avi ation Books PO Box 1/MA Osceola WI 54020 price $2295 item No 16061B big difference way ailerons act depending whether wing straight tapered since tips straight constant chord wing tend fly zero aerodynamic inci dence experience has tapered wings probably needed bit washout didnt have hence trimming ailerons bit up produced effect washout greatly improved low-speed handling Author As said earlier comments slight up-aileron neutral can helpnot Pattern other all-out aerobatics machines typical sport jobs like Kadet has re flexed ailerons per Claude McCulloughs Sig advice have flaps permit ting drag slightly increases angle attack inner wing compared tips gives washed-out tip effect Bentson tement down-aileron does work misleading t Martins book - indicates up-aileron has nearly equal effect down-aileron curves further indicate beyond 1 5-deg range aileron begins act like spoiler may OK up side certainly down side 2 ratio sounds good Author While knowing up-ai leron does some work always assumed work performed down-aileronen visioning down-aileron creating deep camber high CL portion wing up-aileron reflexed camber Perhaps got 26 Model Aviation SCALE RADIO CONTROL SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS JLLLAI5SEND $1 FOR COMPLETE IUUSTRATED CATALOG EROS MA PAWNEE ST SAN MARCOS CA 9 SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013513 738-1576 Catalog Twelve page-Fully Illustrated complete details . MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC carried away Julius Irving flies higher ballerina lends magic Sixers Moses Malone also shakes up enemy troops 2 ratio refers amount up-move ment aileron equate drag down-aileron turn movements equal demands far larger vertical tail overcome down-aileron yaw plane will turn bank ratIer skew around its vertical axis may able use differen tial throws narrow strip ailerons would require ridiculous amount up compensate down-aileron large throws re quired suggests wider ailerons less movement encourage differ ential linkages proof moreup-than-down thing consider Ercoupe early models using 21 aileron differential limited rudder movement Fred Weick de signer sought prevent amateurs overly crossing controls dreaded downwind turns Because virtually old real planes ignored differential lots rud der used along ailerons pilots know about coordination days fliers Giant Scale models insist fly smoothly must coordi nate ailerons rudder use CAR transmitter mode differential being scarce hens teeth early Ercoupe no rudder barit CAR Bentson Alan Slater 85 still active aviation journalist once told about glider pilot 1 920s mistakenly assumed down-aileron did work eliminated opposite upward action went spiral dive overed difficulty go another resulted death Author Charles isnt trying prove something merely relating strange incident stress point dont know circumstances Shallow no dihedral inadequate vertical tail etc establishes down-aileron yaw could controlled tail rudder response poor man doomed such experiment oversized vertical tail would essential would sufficient dihedral powerful rudder could couple aerody namically opposite rolling mo ment three-channel RC picture Eaglet slight washin warp say right tip produces left turn aileron tip warp removed would produce same turn amount down-aile ron corresponded increased lift generated slightly warped tip As tricky standing headon top flagpole Yes agree up-aile ron does almost much work down-aileron Continued page 28 HB ENGINES 21 Grand Prix SCHNEURLE PORTED B C LETS TALK REAL POWER 105 HP @24000 RPM powerful 21 engine H B has produced date flexible engine ever designed. cylinder head can rotated position exhaust stack Rear Left Right GREAT CHOICE FOR FAN JETS Send Si 00 H B Patch Technical Information IIGENES BAVARIAN PRECISION PRODUCTS CO P0 Box 6 Dept E 22 East Avenue canaan connecticut 06840 WHY SETTLE FOR LESS can have Performance/conomy 15x 6 18x 6- 8 10 __________20x 6-8- 10 __ _________22x 81O $1800 Prices include UPS charges D MASTER CHARGE DVISA DCOD DOHECK DMONEY ORDER Dealers / DIstrIbutors Invited ___ DYNATHRUST PROPS INO 2541 NE lith Court Pompano Beach FL 33062 13059419119 Dynathrusts composite construction provides Unequaled Durability Saves money 100% accurate pitch results Outstanding Performance Air Counts October 1983 27 EXHAUST TO THE RIGHT EXHAUST TO THE LEFT s70O $1000 s140O Bring MonoKate classroom right own TV. Top Elites hour MonoKote Video Tape simple flat surfaces fillets hinges Top Elites video tape teaches basic Monokoting skills Learn right own home. per fect club showings too Purchase $3995 rented return within 30 days $2000 refund VHS BETA format available order receives valuable coupon worth up $7560 off list price 12 six foot rolls MonoKote Top Elite. helping step way Send check money order $3995 name full address choice VHS BETA format rOPFUTE MODELS INC TMonoKote Video Tape Otter 1901 N Narragansett Ave Chicago IL 60639 U 213 764-1490 CakQiC qgg IESN 13400-26 Saticoy Streel North Hollywood Calif 91605 UHEAVY DUTYSPECIAL 825I 4-IN SANDERDELUXE SYSTEM F Flit Adjustable table 101 oz HMiter guideU W4Ch letetm $100 101with metal Tx 4 Sand discs1 $300Nicods Chgr 1 3 CASH$2l95$27495 Ship$ 350CASH $15995 PBuI3inkAIR CAPITAL MODELS Ship $ 650 Lifetime SandingReady-ToFlylFB 100 Tools Grit brazedLess Radio EngineU steel Flat type 11/2 xIgSpan radius type 1 x 9 Giant Schoolyard Model Ship Ig 3/4 radius Span 46 049 061$10504061 Engine Both have coarse &engine350sqinchesReg $17995 CASH $139951 fine grits Sf8 peciy. 2-3 CH RadioShip$2500mu Reg $695 Reg $3995$400OR4VIS4 CASH $495 $2597 MORE L Catalog 75 $200 Foreign Add Calif Sales Tax CASH price shown Cards 5% higher 28 Model Aviation Bentson I experience drastically retrimming ailerons fullscale glider 1935 Rhonbuzzard restored ailerons modified half original length well-known sailplane designer However British Gliding Association test panel would test approve because origi nal aileron travel available permit fly set about find safe solution experience large RC models indicated aile ron differentials about 3 actually im proved aileron response look Schleicher K-l 8 best ailerons fleet simi lar differential retrimmed Rhonbuzzard originally-specified up ward deflection considerably red duced down travelabout 2 1 honor testing machine nearly age flown 12 years delight fly much responsive vintage gliders fitted 100-in Monterey Sail plane trailing edge ailerons along inner two-thirds wing panel Movement limited upward Aileron control crisp fast rate roll strongly recommend arrangement Author I just learned something seem have new toy Bentson I used different approach 11-ft RC Sailplane bought dirt-cheap because handled badly roll Author Charles somethingthe guy ever buy model because flew poorly conventional ailerons readjusted give some good differential rigging rest position five degrees up good handling restored able dispense over sized rudder fit much smaller rudder correct spiral sta bility Author rye just read times Unless requirements neutrally-stable alrplane probably symmetrical section Bentson just said mouthful As hacker think per ceive getting roll control out up-aileron has some down remaining net re sult has achieved differential using traditional methodsyes course could get rid oversized vertical tail have smoother-flying machine Reading book sent think means has less center-of-pressure travel much stable machine about axes earlier stall point though good fliers dont get near stall what paid get good things achieved probably immateri al learn less know did come out Chi nese fortune cookie Bentson You mentioned prob Continued page 128 r N WIN session 4-leA SPORT WINCH LightweIght 34 lbs 155kg battery Surprising performance r develops g HP Reliable & durable ity components Easy use stable electrodynamic brake help prevent backlashe Complete around parachute 600 meters go lb braided nylon line $21500 battery shipping charges included also sell finest 160 lb braided nylon contest towline $lg201600 meters plus shipping Send complete descriptive literature price list 68 Morgan Ave Danbury CT 06810 TEL203 743-3312 FASTEN YOUR SEA TBELTS! .ATTYOU CROSS THE THRESHOLD TO THE BLUE ANGELS EX PERIENCE YOU CAN NOW THRILL TO THE REAL LIFE ADVENTURE WITH SIX DARING MEN AND THEIR FLYING MACHINES SIT IN FRONT ROW COCKPIT AND SENSE THE EMOTIONS AND EXTREME CONCEN TRATION AS YOUR DOUGLAS F-4J PHANTOM GOES THROUGH ITS PACES WITH 32000 POUNDS OF THRUST TO TOP SPEED OF 1600 MPH! FULL COLOR VIDEO WITH NAR RATION AND ACTUAL SOUNDS MUSIC BY FRED MYROW 1/2 VHS D V2 Beta 1 El 1/2 Beta2 El 46 mm VIDEO $6500 K 89 min$8500 El Shipping $250 ea lilust Info Pkg $200 El refundable purchase VISA El MASTERCHARGE El Number_________ date_______ N moo _________StateZip AUDIO VISUALS INTERNATIONAL PO BOX 1390 WOODLAND WASHINGTON 98674 Nick Zirolis F4U CORSAIR 2 Cu size Engines Fibergiass Fuse age & Cowlieg aua able fur lee O5SiQC GIANT RIC SCALE PLAN DESIGNS AT6 TEXAN24 I101Span52700ppUSA POKKER DR27163Tripe$2000ppUSA PAP REARCAT2 186Span$2700ppUSA CURTISS P402 194Span$2700ppUSA FAU CORSAIR2Y 193Span$2700ppUSA Fiberglass Cowliegs & Canopies available ase Send sramp aelaileg urusnures Giaer Scale Accessurius Oar Fans seer Fusfpaid arilbin UgAl last item leave also con cerns Sailpianes sort came form short note photograph Dale Willoughby will know has vast collection documentation photographs Scale modelers available Scale Model Research Orange CA As can seen accompanying photograph subject Dales story electric-powered Sailplane-like model being launched recent US/International F3E Challenge com petition photo taken moment wind gust caused model twist launcher Dale Blacks hand Dale member Harbor Soaring Society long-time RC Sailplane Ilier momentarily forgot model whirling prop its nose quick grab straighten twisting model resulted some nasty cuts left hand Moral Dont grab business end F3E Have safe month John Preston 7012 Elvira Cr Falls Church VA 22042 Fun/Winter Continued page 28 lems inadequately-sized vertical tail area old designs Author case full-scale old-timers am great believer sticking orig inal scale size compensating providing thicker effective sec tion Most modelers completely ignore aerodynamics come tail cut out sheet material cause comparatively small size tail surfaces models need especial attention section used sug gestion square trailing edge good Author talking model aile rons flutterpointed control sur face edges probablyand Joe Bridis constant-thickness ailerons trainers Author I half-buy However smaller model tougher stick scale tail areas time get 1/5-scale larger ability hold hold scale size penal ty becomes increasingly greater de part scale airfoils resort freely flat-bottomed ones Especially thick have serious CP travel increasing angles attack thus require larger tail area symmetrical semi-symmetri cal some other scale section used first case because mon keying around might need 30% stab latter less 20% 15% less ship least 4/2 5 ft span long fuselage arm 10% would feasible some cases talk full-scale powerplane experience glider experience scanty have noted RC models sectioned stabs streamlined double-triangles end-to-end ribs fly better sheet-tailed crates dont have foggiest reason respected pilots say true Bentson Perhaps best argument upward-rigged ailerons comes modern sailplanes camber-changing flaps ailerons arranged move up down flaps Although would preferable take off aerotow flaps slightly down common practice take off least initiate takeoff run flaps up cause better aileron control obtained less likelihood wing tip touching ground case aile ron drag factor because tow attachment nose Humor guys because game plan column has gone up smoke Old-timer modelers Indoors Sailplanes FF Power etc have dozens years hands-on experience better Rubber Scalersand Wakefielders Nordic guys think Tweakers Breathers fine tuning crates seems stream consciousness us books articles aerodynamics appear written folks weve never met greater man able communicate matters far beyond us simple understandable wayand truths revealed witnessed TV worlds greatest musicians con duct Masters Classescelloist Casals exampleyou mesmerized ability true geniuses touch gestures simple words humblest student dare say Ein stein field Dr Lippisch could convey over coffee glimpse im ponderables unattainable lifetime reading Having nothing prove great teachers dont blow us away avalanches math gobbledygook contrived impress peers close loopholes criticism other elitists talking During early 1930s once sat up night reading small book aero dynamics explained airplane flew basics stability factors propeller design designer went about buildingblock process based rudimentary things probably way people like Bellanca Fokker etc wrought magic simple book seemed like Christmas Future So humble author George Page greatest designers age man produced miracles Curtiss years before war Youll never see book like again alas read About Size January 1978 Model Aviation Brad Powers experienced vision basic relationships Powers long re tired few readers knew renowned project engineer Convair participated long string re markable aircraft Somewhat like Page compressed universe rare 128 Model Aviation briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft
Edition: Model Aviation - 1983/10
Page Numbers: 20, 21, 22, 24, 26, 27, 28, 128, 129
FRIDAY MORNINGS lot better Mondays especially after exhil arating evenings flying modified 2/2l Leisure LR5O-powered model cabin configuration make com parisons Parasols have minor draw back especially use high pretty tail can understand consider Pattern jobs have high forward profile assist knife-edge flight put parasol banked turn go hands-off tends tighten turn un corrected begins go spiral dive requires opposite rudder twoand three-channel jobs sup posed have FF-like good gliding abili ty cabin configuration case reduces need use rudder stay hands-off once trimmed circle lift found old FF tricksthat 1fting airfoiled stab well aft CG nice things Climb does appear steep crate just seeming rise until attains high altitudes thought knew about lifting tails Oh yeah honest 9-1 0-mmminimum crate lifeless evening warm-air evenings sunny dura tion 13 mm thermals CG come out parasol 35% chord obviously too far forward big airfoiled stab anybody would settle excellent performance Climb-out analogous Cub Champ both have best rate climb 65 hp 60 mph light planes reduced power youd have retrim higher airspeed best-climb rate new power setting Electric does same thing goes power plateau gradually remove slight up-trim Since crate handles like light plane chop power Jomar propor tional throttle Joe Utasi naturally up-trim required best glide Ele vators gentle Glide duration 45% power run time takes get max altitude Now having moved 250 rnAh re ceiver pack back 1 perfect CG lifting tail 40% 1-deg angular difference first tried 1/16 shim under wing LE increase difference High up crate appeared float slow ly power off duration off 30 sec less sink probably better L/D ratio used full-up for20 Model Aviation U jUSt fun Bill Winter Left Charles Bentson featured column flew fin-mounted Cox 02-powered 54-in-span glider International Veteran Glider Meet fun along Martin Simonswhose book Bill Winter talks about meet storied Wasserkuppe gliding began flourish after 1914-iS war cloudy gusty misty rain late day Simons talked Bentson down after 20 minutes Bentsons fogged glasses forced him go instruments Right Bentsons lovely flying wing glider Use reflexed NACA 23012 eirfpil gives stability spite rectangular no-sweep wing text Bentson adds discussion effects ailerons Please meet old friend Bill Winters New Zealand Bill Mackley 50-year-plus self-designed Free Flight two met Kingston Ont Canada Mackley instruct ing RAF pilots 1-larvards after bomber tour over Europe Mackley now retired after lifetime civil aviation visits Washington DC behalf Flight Safety Foundation model refurbished bright red blue yellow Solarfilm since original bamboo paper wss tatters Baby Cyclone engine still usable tank spark coil missing Winter published picture plane September 1942 issue Air Trails magazine Mackley now installing RC electric power Time marches ward CG although CG moved back crate almost entirely handsofftakeoffs 15-20 ft needing no controls will drop prop pitch 7 7 li-in diameter hopefully faster climb less current consump tion longer runs shut off 5 max 6 mm order have power dragging approaches possible gorounds want keep realistic light-plane piloting technique man thats fun favor trim power l0und tfle ratters oy lius MunIcn tnis Geodetic Galaxie 300 FF 20 years ago Mills 045 diesel Its now converted Leisure LT5O electric power six motor cells Cannon micros elevator rudder weighs 31 oz props 9-7 Torna gets li-mm flights 10-mm motor battery charge Joy fly gentle forgiving great glide says Gus reports Elec tric flying proliferating Long Island Playboys Winters recent tip East Islipchange Westl Winter says really didnt design oncepopular FF previous Air Trails magazine article averaged dimensions areas etc numerous FFs Americas greatest fliers American averagewith precise area used Denny Davis sensa tional Class Hogan Sal Taibi recalls being beaten Indianapolis Junior beginner took first Old-timers will interested full-size detailed plan Class AB version being sold $350 pIus 65 cents postage SAMs Bob Larsh 45 South Whitcomb Ave Indianapolis IN 46241 Arden 19-size three-view based Winter opines vertical tail looks too big now Anyway stood threepoint ROGing single wheel some up-trim -for power off Al though Don Srulls magnificent Electric Sparky flies greater authority spectacular much sur prised find four flights both ships alternating came up four identical flight times Yesterdays flying proved 7-in pitch gets altitude 7-in pitch too much just barely both cases / - 7 4LL AMER/CAN Designed BILL WINTER WINGSPAN 54 WING AREA384 SQ STA6ILlZER 385% MOMENT ARM 39% POWERARDEN 199 L L L L L WF7II-----I-- I I I II NOTE MODEL FEATURED IMPLE 1/8 KEEL FUSELAGE WITH I/B BOTTOM FROM AIR TRAILS CIRCA 1948/49 liii LF C --7 --7 L 1 L L L LLL- ES 0 2 3 4 5 6 7 8 10 1214 16hid Balsa USA Taube modified Larry Hill Pine Barons MAC New Jersey has nice Stand-Off Scale look scalloped trail ing edges surfaces added ailerons covered fuselage back TE 1/64 plywood adding glue rivets painted ply silver Dummied six-cylinder water-cooled engine radiators added top bottom kingposts flying wires wing tail Antique Coy erite Fuselage fin rudder sprayed Krylon 2504 beige hide balsa grain Has OS Max 35 turns 10-5 2-oz prop nut balance flew right off no trim changes has scalelike speed very satisfying project says Larry 0 October 1983 21 GUSTAVE WHITEHEADHERO OR HOAX Thanks recent article Don Berliner American Modeler magazine article William ODwyer 1968 modelers aware Whitehead may have flown 1901 Whitehead affair described some hoax print Ger man immigrant pictured virtual nobody Whitehead nobody respected peers press day found Page newspa pers international magazines articles about Whitehead have appeared through yearsyet virtually no history today mentions him controversial photo has surfaced part presumed van ished photo collection Hoax implies conspiracy Yet 14 witnesses flights found over genera tion research signed affidavits obviously could have consorted Some taped old age Included big-city newspaper editor banker wrote experience 1953 contract between Smithsonian Institution Wright estate compromises Institution relative publication early materials purport question Wrights ing first fly traces back long-ago claims Smithsonian Lang ley flown first No dreamt Whitehead would surface years later ODwyer after Stella Randolph came upon Whitehead artifacts early 30s has spent 20 years $50000 research cru sadehe has six legal-sized cabinets infor mation matched Gustave Whitehead Museum Germany ODwyer has invited Smithsonian examine files German Readers Digest corporate associate American Readers Digest has published book about worlds greatest inventors past 100 years five separate references Whitehead Collec tors will interested block stamps issued German post office bear planform Whitehead machine Whitehead American citizen Since may able read fine print stamps lines bottom read Gus tav Weiskopf 1481901 Karlo Jatho 188 1903 Gebr Wright 17121903 other photos show front back monu ment stands front Whitehead Museum Leutershausen Germany Carl Jatho August 18 1903 flew 581 sq ft biplane 9%-hp engine 59 ft altitude 2% ft Rede signed monoplane 387% sq ft handle wind autumn 1903 attained 196 ft height 11 ft flights did equate Wrights flight certain respects claimed Father Flight Guinness Book Air 7P4 03 ~ an post offices special issue Gustave Whitehead stamps above front back Whitehead monument below Whitehead Museum Leuterhausen Germany Facts Feats specifically lists successful flights still earlier birdmen People getting off groundthat history no mention Whitehead difference between Whiteheads ma chine other early-day contenders except ing Wrights described steerable claimed 1901 flight both sustained steered Whether Whitehead flights ever accepted requiring neutral evaluation bodya respect history requires Whitehead paid due effective anhi-Whitehead written statement out past shows three distinct handwritings signed near future international annual award program will begin under German spon sorshipalong lines Nobel program special awards people high achievement perhaps dozen categories including modeling have already asked yearly nominations five outstanding American modelers Old Gus might aviations Man Iron Mask Bill Winter bad news good news guys using foreign plastic folding props ones tried de cided pathetic Theres break through props least certain kinds mod el will double perhaps triple altitude several excursions pinpoint durationwith spectacular increases rate climb speed length motor run imagine stuff will published soon Back drawing board fellows weather scared off mob just Mad Test Pilot treat ing K&B 60-powered Schlepp POWR young fellow writ ten about some months backlets just call him Brad So made first test hop Jayhawk RTF keep mut tering about Kadet last year two sad OS 35sthe Kadet ended up K&B 40 35s badly beaten varnished works 35 came life smoothed out remarkably after POWR treatment sold Mad Test Pilot little RTF treated engine flew right off proving fast 40 Kadet propped Master Airscrew 9-6 looped rolled inverted wingoveredall first try underestimated ailerons Continued page 24 22 Model Aviation New Specials S795 Look Squadron/Signal Display ALL better Hobby Shops Book Stores favorite Hobby Shop Bookstore does carry Squadron/Signal books send S50 postage & handling Name Address us FREE Squadron/Signal catalog names distributors carry books Squadron/Signal Publication Dept SP2 1115 Crowley Dr Carroilton Tx 75011-5010 set up too much throw Jayhawk almost rolled first correction Max stick movement 1/8 come across things ignore strange aileron installation always cut hole through skin foam lined thin plywood epoxied servo rails front back box Maybe am vamped think RTFs fun would consider aileron trainer Its lively course am Young Brad Midwest Stik also flew LR50 electric-powered Drifter II no gearbut takes off does touch-and-goes has wire skid/strut under forward belly Stik has OS 50 12-oz tank will disappear climbing straight up like spectacular exits published Phil Krafts Stik Grid Leaks early 1960s al ways thought worlds ugliest airplane Some people hate Stiks like some Rubber Scale modelers detest Laceys like Lacey cannot beat Stik flying ability may greatest all-around free-style aerobatics machine ever concocted does things flat wing beyond What things Well hands-off flying young Brad try things Up down field went touch control ex cept turn around although finally would begin vear off its heading Slow flight almost standstill rolls like energetic puppy Brad does intentional flat spins sometimes occur crates aft balance pointand usually cannot recover chap begins regu lar spin slowly feeds opposite aileron Slowly goes flat after pinwheeling perhaps 20 times re laxes control darn thing comes out after five revolutions can blast out rudder control spin slow approach turbulent air keeps pilot busy good air speed can grease in gale must getting old could enjoy building easy flying crate once detested Hang-ups cheat Well top off Mad Test Pilot tore up place Sig Kavalier HP 40 Two years shenanigans unscratched Both crates outer limits joke about re flexes eye perception goes firstlike waiting signals outer space Another strange evening clouds winds odd mix crates some wonderful flying Saturday morning Let see search handle long disserta tion about ailerons RC jobs recent issue seems have accessed everybodys houshold Apple particu larly fine letter Charles W Bentson Continued page 26 24 Model Aviation 6156 Tne Eawrern F-roflf Astounding plastics.. discrir Either Pilotkit.. Sportsman barnstormer.. *Darn Good Airmen.. complete iiflIMAA eSatNYS Residents add 7% Sales tax APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE WHEEIS CONTROLUNEFREE-FLIGHT 000 VINTAGESMOOTHGOLDEN AGENEW sizes2l/CONTOURsIzes21/2BALLOON 3/a3423/i 343 133413/4 1342/z41/2 1144%14 33411/4 43/i31451/4 114511441/211453 1/a6/a2145141/a6 EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL Los Angeles sheds much-needed illumination support statements enclosed copies few pages mysterious book loaded what first glance seemed just erudite mysteries math over whelming diagrams wondered could decipher fine print Strangely books author seemed talking about models much real-plane long-hair stuff obviously knew score gosh reading things didnt know hooked asked Bentson what book pages came fromand chance something published Ill tell about book think masterpiece Ive read over over am still lets pick up some what Bentson say true modelers dont understand effects ailerons low-speed flight Charles began comments washin FF models especially interesting order find some answers took out Martin Si mons Model Aircraft Aerodynamics Argus Books Ltd 14 St James Rd Watford Herts England Editor may obtain book Zenith Avi ation Books PO Box 1/MA Osceola WI 54020 price $2295 item No 16061B big difference way ailerons act depending whether wing straight tapered since tips straight constant chord wing tend fly zero aerodynamic inci dence experience has tapered wings probably needed bit washout didnt have hence trimming ailerons bit up produced effect washout greatly improved low-speed handling Author As said earlier comments slight up-aileron neutral can helpnot Pattern other all-out aerobatics machines typical sport jobs like Kadet has re flexed ailerons per Claude McCulloughs Sig advice have flaps permit ting drag slightly increases angle attack inner wing compared tips gives washed-out tip effect Bentson tement down-aileron does work misleading t Martins book - indicates up-aileron has nearly equal effect down-aileron curves further indicate beyond 1 5-deg range aileron begins act like spoiler may OK up side certainly down side 2 ratio sounds good Author While knowing up-ai leron does some work always assumed work performed down-aileronen visioning down-aileron creating deep camber high CL portion wing up-aileron reflexed camber Perhaps got 26 Model Aviation SCALE RADIO CONTROL SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS JLLLAI5SEND $1 FOR COMPLETE IUUSTRATED CATALOG EROS MA PAWNEE ST SAN MARCOS CA 9 SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013513 738-1576 Catalog Twelve page-Fully Illustrated complete details . MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC carried away Julius Irving flies higher ballerina lends magic Sixers Moses Malone also shakes up enemy troops 2 ratio refers amount up-move ment aileron equate drag down-aileron turn movements equal demands far larger vertical tail overcome down-aileron yaw plane will turn bank ratIer skew around its vertical axis may able use differen tial throws narrow strip ailerons would require ridiculous amount up compensate down-aileron large throws re quired suggests wider ailerons less movement encourage differ ential linkages proof moreup-than-down thing consider Ercoupe early models using 21 aileron differential limited rudder movement Fred Weick de signer sought prevent amateurs overly crossing controls dreaded downwind turns Because virtually old real planes ignored differential lots rud der used along ailerons pilots know about coordination days fliers Giant Scale models insist fly smoothly must coordi nate ailerons rudder use CAR transmitter mode differential being scarce hens teeth early Ercoupe no rudder barit CAR Bentson Alan Slater 85 still active aviation journalist once told about glider pilot 1 920s mistakenly assumed down-aileron did work eliminated opposite upward action went spiral dive overed difficulty go another resulted death Author Charles isnt trying prove something merely relating strange incident stress point dont know circumstances Shallow no dihedral inadequate vertical tail etc establishes down-aileron yaw could controlled tail rudder response poor man doomed such experiment oversized vertical tail would essential would sufficient dihedral powerful rudder could couple aerody namically opposite rolling mo ment three-channel RC picture Eaglet slight washin warp say right tip produces left turn aileron tip warp removed would produce same turn amount down-aile ron corresponded increased lift generated slightly warped tip As tricky standing headon top flagpole Yes agree up-aile ron does almost much work down-aileron Continued page 28 HB ENGINES 21 Grand Prix SCHNEURLE PORTED B C LETS TALK REAL POWER 105 HP @24000 RPM powerful 21 engine H B has produced date flexible engine ever designed. cylinder head can rotated position exhaust stack Rear Left Right GREAT CHOICE FOR FAN JETS Send Si 00 H B Patch Technical Information IIGENES BAVARIAN PRECISION PRODUCTS CO P0 Box 6 Dept E 22 East Avenue canaan connecticut 06840 WHY SETTLE FOR LESS can have Performance/conomy 15x 6 18x 6- 8 10 __________20x 6-8- 10 __ _________22x 81O $1800 Prices include UPS charges D MASTER CHARGE DVISA DCOD DOHECK DMONEY ORDER Dealers / DIstrIbutors Invited ___ DYNATHRUST PROPS INO 2541 NE lith Court Pompano Beach FL 33062 13059419119 Dynathrusts composite construction provides Unequaled Durability Saves money 100% accurate pitch results Outstanding Performance Air Counts October 1983 27 EXHAUST TO THE RIGHT EXHAUST TO THE LEFT s70O $1000 s140O Bring MonoKate classroom right own TV. Top Elites hour MonoKote Video Tape simple flat surfaces fillets hinges Top Elites video tape teaches basic Monokoting skills Learn right own home. per fect club showings too Purchase $3995 rented return within 30 days $2000 refund VHS BETA format available order receives valuable coupon worth up $7560 off list price 12 six foot rolls MonoKote Top Elite. helping step way Send check money order $3995 name full address choice VHS BETA format rOPFUTE MODELS INC TMonoKote Video Tape Otter 1901 N Narragansett Ave Chicago IL 60639 U 213 764-1490 CakQiC qgg IESN 13400-26 Saticoy Streel North Hollywood Calif 91605 UHEAVY DUTYSPECIAL 825I 4-IN SANDERDELUXE SYSTEM F Flit Adjustable table 101 oz HMiter guideU W4Ch letetm $100 101with metal Tx 4 Sand discs1 $300Nicods Chgr 1 3 CASH$2l95$27495 Ship$ 350CASH $15995 PBuI3inkAIR CAPITAL MODELS Ship $ 650 Lifetime SandingReady-ToFlylFB 100 Tools Grit brazedLess Radio EngineU steel Flat type 11/2 xIgSpan radius type 1 x 9 Giant Schoolyard Model Ship Ig 3/4 radius Span 46 049 061$10504061 Engine Both have coarse &engine350sqinchesReg $17995 CASH $139951 fine grits Sf8 peciy. 2-3 CH RadioShip$2500mu Reg $695 Reg $3995$400OR4VIS4 CASH $495 $2597 MORE L Catalog 75 $200 Foreign Add Calif Sales Tax CASH price shown Cards 5% higher 28 Model Aviation Bentson I experience drastically retrimming ailerons fullscale glider 1935 Rhonbuzzard restored ailerons modified half original length well-known sailplane designer However British Gliding Association test panel would test approve because origi nal aileron travel available permit fly set about find safe solution experience large RC models indicated aile ron differentials about 3 actually im proved aileron response look Schleicher K-l 8 best ailerons fleet simi lar differential retrimmed Rhonbuzzard originally-specified up ward deflection considerably red duced down travelabout 2 1 honor testing machine nearly age flown 12 years delight fly much responsive vintage gliders fitted 100-in Monterey Sail plane trailing edge ailerons along inner two-thirds wing panel Movement limited upward Aileron control crisp fast rate roll strongly recommend arrangement Author I just learned something seem have new toy Bentson I used different approach 11-ft RC Sailplane bought dirt-cheap because handled badly roll Author Charles somethingthe guy ever buy model because flew poorly conventional ailerons readjusted give some good differential rigging rest position five degrees up good handling restored able dispense over sized rudder fit much smaller rudder correct spiral sta bility Author rye just read times Unless requirements neutrally-stable alrplane probably symmetrical section Bentson just said mouthful As hacker think per ceive getting roll control out up-aileron has some down remaining net re sult has achieved differential using traditional methodsyes course could get rid oversized vertical tail have smoother-flying machine Reading book sent think means has less center-of-pressure travel much stable machine about axes earlier stall point though good fliers dont get near stall what paid get good things achieved probably immateri al learn less know did come out Chi nese fortune cookie Bentson You mentioned prob Continued page 128 r N WIN session 4-leA SPORT WINCH LightweIght 34 lbs 155kg battery Surprising performance r develops g HP Reliable & durable ity components Easy use stable electrodynamic brake help prevent backlashe Complete around parachute 600 meters go lb braided nylon line $21500 battery shipping charges included also sell finest 160 lb braided nylon contest towline $lg201600 meters plus shipping Send complete descriptive literature price list 68 Morgan Ave Danbury CT 06810 TEL203 743-3312 FASTEN YOUR SEA TBELTS! .ATTYOU CROSS THE THRESHOLD TO THE BLUE ANGELS EX PERIENCE YOU CAN NOW THRILL TO THE REAL LIFE ADVENTURE WITH SIX DARING MEN AND THEIR FLYING MACHINES SIT IN FRONT ROW COCKPIT AND SENSE THE EMOTIONS AND EXTREME CONCEN TRATION AS YOUR DOUGLAS F-4J PHANTOM GOES THROUGH ITS PACES WITH 32000 POUNDS OF THRUST TO TOP SPEED OF 1600 MPH! FULL COLOR VIDEO WITH NAR RATION AND ACTUAL SOUNDS MUSIC BY FRED MYROW 1/2 VHS D V2 Beta 1 El 1/2 Beta2 El 46 mm VIDEO $6500 K 89 min$8500 El Shipping $250 ea lilust Info Pkg $200 El refundable purchase VISA El MASTERCHARGE El Number_________ date_______ N moo _________StateZip AUDIO VISUALS INTERNATIONAL PO BOX 1390 WOODLAND WASHINGTON 98674 Nick Zirolis F4U CORSAIR 2 Cu size Engines Fibergiass Fuse age & Cowlieg aua able fur lee O5SiQC GIANT RIC SCALE PLAN DESIGNS AT6 TEXAN24 I101Span52700ppUSA POKKER DR27163Tripe$2000ppUSA PAP REARCAT2 186Span$2700ppUSA CURTISS P402 194Span$2700ppUSA FAU CORSAIR2Y 193Span$2700ppUSA Fiberglass Cowliegs & Canopies available ase Send sramp aelaileg urusnures Giaer Scale Accessurius Oar Fans seer Fusfpaid arilbin UgAl last item leave also con cerns Sailpianes sort came form short note photograph Dale Willoughby will know has vast collection documentation photographs Scale modelers available Scale Model Research Orange CA As can seen accompanying photograph subject Dales story electric-powered Sailplane-like model being launched recent US/International F3E Challenge com petition photo taken moment wind gust caused model twist launcher Dale Blacks hand Dale member Harbor Soaring Society long-time RC Sailplane Ilier momentarily forgot model whirling prop its nose quick grab straighten twisting model resulted some nasty cuts left hand Moral Dont grab business end F3E Have safe month John Preston 7012 Elvira Cr Falls Church VA 22042 Fun/Winter Continued page 28 lems inadequately-sized vertical tail area old designs Author case full-scale old-timers am great believer sticking orig inal scale size compensating providing thicker effective sec tion Most modelers completely ignore aerodynamics come tail cut out sheet material cause comparatively small size tail surfaces models need especial attention section used sug gestion square trailing edge good Author talking model aile rons flutterpointed control sur face edges probablyand Joe Bridis constant-thickness ailerons trainers Author I half-buy However smaller model tougher stick scale tail areas time get 1/5-scale larger ability hold hold scale size penal ty becomes increasingly greater de part scale airfoils resort freely flat-bottomed ones Especially thick have serious CP travel increasing angles attack thus require larger tail area symmetrical semi-symmetri cal some other scale section used first case because mon keying around might need 30% stab latter less 20% 15% less ship least 4/2 5 ft span long fuselage arm 10% would feasible some cases talk full-scale powerplane experience glider experience scanty have noted RC models sectioned stabs streamlined double-triangles end-to-end ribs fly better sheet-tailed crates dont have foggiest reason respected pilots say true Bentson Perhaps best argument upward-rigged ailerons comes modern sailplanes camber-changing flaps ailerons arranged move up down flaps Although would preferable take off aerotow flaps slightly down common practice take off least initiate takeoff run flaps up cause better aileron control obtained less likelihood wing tip touching ground case aile ron drag factor because tow attachment nose Humor guys because game plan column has gone up smoke Old-timer modelers Indoors Sailplanes FF Power etc have dozens years hands-on experience better Rubber Scalersand Wakefielders Nordic guys think Tweakers Breathers fine tuning crates seems stream consciousness us books articles aerodynamics appear written folks weve never met greater man able communicate matters far beyond us simple understandable wayand truths revealed witnessed TV worlds greatest musicians con duct Masters Classescelloist Casals exampleyou mesmerized ability true geniuses touch gestures simple words humblest student dare say Ein stein field Dr Lippisch could convey over coffee glimpse im ponderables unattainable lifetime reading Having nothing prove great teachers dont blow us away avalanches math gobbledygook contrived impress peers close loopholes criticism other elitists talking During early 1930s once sat up night reading small book aero dynamics explained airplane flew basics stability factors propeller design designer went about buildingblock process based rudimentary things probably way people like Bellanca Fokker etc wrought magic simple book seemed like Christmas Future So humble author George Page greatest designers age man produced miracles Curtiss years before war Youll never see book like again alas read About Size January 1978 Model Aviation Brad Powers experienced vision basic relationships Powers long re tired few readers knew renowned project engineer Convair participated long string re markable aircraft Somewhat like Page compressed universe rare 128 Model Aviation briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft
Edition: Model Aviation - 1983/10
Page Numbers: 20, 21, 22, 24, 26, 27, 28, 128, 129
FRIDAY MORNINGS lot better Mondays especially after exhil arating evenings flying modified 2/2l Leisure LR5O-powered model cabin configuration make com parisons Parasols have minor draw back especially use high pretty tail can understand consider Pattern jobs have high forward profile assist knife-edge flight put parasol banked turn go hands-off tends tighten turn un corrected begins go spiral dive requires opposite rudder twoand three-channel jobs sup posed have FF-like good gliding abili ty cabin configuration case reduces need use rudder stay hands-off once trimmed circle lift found old FF tricksthat 1fting airfoiled stab well aft CG nice things Climb does appear steep crate just seeming rise until attains high altitudes thought knew about lifting tails Oh yeah honest 9-1 0-mmminimum crate lifeless evening warm-air evenings sunny dura tion 13 mm thermals CG come out parasol 35% chord obviously too far forward big airfoiled stab anybody would settle excellent performance Climb-out analogous Cub Champ both have best rate climb 65 hp 60 mph light planes reduced power youd have retrim higher airspeed best-climb rate new power setting Electric does same thing goes power plateau gradually remove slight up-trim Since crate handles like light plane chop power Jomar propor tional throttle Joe Utasi naturally up-trim required best glide Ele vators gentle Glide duration 45% power run time takes get max altitude Now having moved 250 rnAh re ceiver pack back 1 perfect CG lifting tail 40% 1-deg angular difference first tried 1/16 shim under wing LE increase difference High up crate appeared float slow ly power off duration off 30 sec less sink probably better L/D ratio used full-up for20 Model Aviation U jUSt fun Bill Winter Left Charles Bentson featured column flew fin-mounted Cox 02-powered 54-in-span glider International Veteran Glider Meet fun along Martin Simonswhose book Bill Winter talks about meet storied Wasserkuppe gliding began flourish after 1914-iS war cloudy gusty misty rain late day Simons talked Bentson down after 20 minutes Bentsons fogged glasses forced him go instruments Right Bentsons lovely flying wing glider Use reflexed NACA 23012 eirfpil gives stability spite rectangular no-sweep wing text Bentson adds discussion effects ailerons Please meet old friend Bill Winters New Zealand Bill Mackley 50-year-plus self-designed Free Flight two met Kingston Ont Canada Mackley instruct ing RAF pilots 1-larvards after bomber tour over Europe Mackley now retired after lifetime civil aviation visits Washington DC behalf Flight Safety Foundation model refurbished bright red blue yellow Solarfilm since original bamboo paper wss tatters Baby Cyclone engine still usable tank spark coil missing Winter published picture plane September 1942 issue Air Trails magazine Mackley now installing RC electric power Time marches ward CG although CG moved back crate almost entirely handsofftakeoffs 15-20 ft needing no controls will drop prop pitch 7 7 li-in diameter hopefully faster climb less current consump tion longer runs shut off 5 max 6 mm order have power dragging approaches possible gorounds want keep realistic light-plane piloting technique man thats fun favor trim power l0und tfle ratters oy lius MunIcn tnis Geodetic Galaxie 300 FF 20 years ago Mills 045 diesel Its now converted Leisure LT5O electric power six motor cells Cannon micros elevator rudder weighs 31 oz props 9-7 Torna gets li-mm flights 10-mm motor battery charge Joy fly gentle forgiving great glide says Gus reports Elec tric flying proliferating Long Island Playboys Winters recent tip East Islipchange Westl Winter says really didnt design oncepopular FF previous Air Trails magazine article averaged dimensions areas etc numerous FFs Americas greatest fliers American averagewith precise area used Denny Davis sensa tional Class Hogan Sal Taibi recalls being beaten Indianapolis Junior beginner took first Old-timers will interested full-size detailed plan Class AB version being sold $350 pIus 65 cents postage SAMs Bob Larsh 45 South Whitcomb Ave Indianapolis IN 46241 Arden 19-size three-view based Winter opines vertical tail looks too big now Anyway stood threepoint ROGing single wheel some up-trim -for power off Al though Don Srulls magnificent Electric Sparky flies greater authority spectacular much sur prised find four flights both ships alternating came up four identical flight times Yesterdays flying proved 7-in pitch gets altitude 7-in pitch too much just barely both cases / - 7 4LL AMER/CAN Designed BILL WINTER WINGSPAN 54 WING AREA384 SQ STA6ILlZER 385% MOMENT ARM 39% POWERARDEN 199 L L L L L WF7II-----I-- I I I II NOTE MODEL FEATURED IMPLE 1/8 KEEL FUSELAGE WITH I/B BOTTOM FROM AIR TRAILS CIRCA 1948/49 liii LF C --7 --7 L 1 L L L LLL- ES 0 2 3 4 5 6 7 8 10 1214 16hid Balsa USA Taube modified Larry Hill Pine Barons MAC New Jersey has nice Stand-Off Scale look scalloped trail ing edges surfaces added ailerons covered fuselage back TE 1/64 plywood adding glue rivets painted ply silver Dummied six-cylinder water-cooled engine radiators added top bottom kingposts flying wires wing tail Antique Coy erite Fuselage fin rudder sprayed Krylon 2504 beige hide balsa grain Has OS Max 35 turns 10-5 2-oz prop nut balance flew right off no trim changes has scalelike speed very satisfying project says Larry 0 October 1983 21 GUSTAVE WHITEHEADHERO OR HOAX Thanks recent article Don Berliner American Modeler magazine article William ODwyer 1968 modelers aware Whitehead may have flown 1901 Whitehead affair described some hoax print Ger man immigrant pictured virtual nobody Whitehead nobody respected peers press day found Page newspa pers international magazines articles about Whitehead have appeared through yearsyet virtually no history today mentions him controversial photo has surfaced part presumed van ished photo collection Hoax implies conspiracy Yet 14 witnesses flights found over genera tion research signed affidavits obviously could have consorted Some taped old age Included big-city newspaper editor banker wrote experience 1953 contract between Smithsonian Institution Wright estate compromises Institution relative publication early materials purport question Wrights ing first fly traces back long-ago claims Smithsonian Lang ley flown first No dreamt Whitehead would surface years later ODwyer after Stella Randolph came upon Whitehead artifacts early 30s has spent 20 years $50000 research cru sadehe has six legal-sized cabinets infor mation matched Gustave Whitehead Museum Germany ODwyer has invited Smithsonian examine files German Readers Digest corporate associate American Readers Digest has published book about worlds greatest inventors past 100 years five separate references Whitehead Collec tors will interested block stamps issued German post office bear planform Whitehead machine Whitehead American citizen Since may able read fine print stamps lines bottom read Gus tav Weiskopf 1481901 Karlo Jatho 188 1903 Gebr Wright 17121903 other photos show front back monu ment stands front Whitehead Museum Leutershausen Germany Carl Jatho August 18 1903 flew 581 sq ft biplane 9%-hp engine 59 ft altitude 2% ft Rede signed monoplane 387% sq ft handle wind autumn 1903 attained 196 ft height 11 ft flights did equate Wrights flight certain respects claimed Father Flight Guinness Book Air 7P4 03 ~ an post offices special issue Gustave Whitehead stamps above front back Whitehead monument below Whitehead Museum Leuterhausen Germany Facts Feats specifically lists successful flights still earlier birdmen People getting off groundthat history no mention Whitehead difference between Whiteheads ma chine other early-day contenders except ing Wrights described steerable claimed 1901 flight both sustained steered Whether Whitehead flights ever accepted requiring neutral evaluation bodya respect history requires Whitehead paid due effective anhi-Whitehead written statement out past shows three distinct handwritings signed near future international annual award program will begin under German spon sorshipalong lines Nobel program special awards people high achievement perhaps dozen categories including modeling have already asked yearly nominations five outstanding American modelers Old Gus might aviations Man Iron Mask Bill Winter bad news good news guys using foreign plastic folding props ones tried de cided pathetic Theres break through props least certain kinds mod el will double perhaps triple altitude several excursions pinpoint durationwith spectacular increases rate climb speed length motor run imagine stuff will published soon Back drawing board fellows weather scared off mob just Mad Test Pilot treat ing K&B 60-powered Schlepp POWR young fellow writ ten about some months backlets just call him Brad So made first test hop Jayhawk RTF keep mut tering about Kadet last year two sad OS 35sthe Kadet ended up K&B 40 35s badly beaten varnished works 35 came life smoothed out remarkably after POWR treatment sold Mad Test Pilot little RTF treated engine flew right off proving fast 40 Kadet propped Master Airscrew 9-6 looped rolled inverted wingoveredall first try underestimated ailerons Continued page 24 22 Model Aviation New Specials S795 Look Squadron/Signal Display ALL better Hobby Shops Book Stores favorite Hobby Shop Bookstore does carry Squadron/Signal books send S50 postage & handling Name Address us FREE Squadron/Signal catalog names distributors carry books Squadron/Signal Publication Dept SP2 1115 Crowley Dr Carroilton Tx 75011-5010 set up too much throw Jayhawk almost rolled first correction Max stick movement 1/8 come across things ignore strange aileron installation always cut hole through skin foam lined thin plywood epoxied servo rails front back box Maybe am vamped think RTFs fun would consider aileron trainer Its lively course am Young Brad Midwest Stik also flew LR50 electric-powered Drifter II no gearbut takes off does touch-and-goes has wire skid/strut under forward belly Stik has OS 50 12-oz tank will disappear climbing straight up like spectacular exits published Phil Krafts Stik Grid Leaks early 1960s al ways thought worlds ugliest airplane Some people hate Stiks like some Rubber Scale modelers detest Laceys like Lacey cannot beat Stik flying ability may greatest all-around free-style aerobatics machine ever concocted does things flat wing beyond What things Well hands-off flying young Brad try things Up down field went touch control ex cept turn around although finally would begin vear off its heading Slow flight almost standstill rolls like energetic puppy Brad does intentional flat spins sometimes occur crates aft balance pointand usually cannot recover chap begins regu lar spin slowly feeds opposite aileron Slowly goes flat after pinwheeling perhaps 20 times re laxes control darn thing comes out after five revolutions can blast out rudder control spin slow approach turbulent air keeps pilot busy good air speed can grease in gale must getting old could enjoy building easy flying crate once detested Hang-ups cheat Well top off Mad Test Pilot tore up place Sig Kavalier HP 40 Two years shenanigans unscratched Both crates outer limits joke about re flexes eye perception goes firstlike waiting signals outer space Another strange evening clouds winds odd mix crates some wonderful flying Saturday morning Let see search handle long disserta tion about ailerons RC jobs recent issue seems have accessed everybodys houshold Apple particu larly fine letter Charles W Bentson Continued page 26 24 Model Aviation 6156 Tne Eawrern F-roflf Astounding plastics.. discrir Either Pilotkit.. Sportsman barnstormer.. *Darn Good Airmen.. complete iiflIMAA eSatNYS Residents add 7% Sales tax APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE WHEEIS CONTROLUNEFREE-FLIGHT 000 VINTAGESMOOTHGOLDEN AGENEW sizes2l/CONTOURsIzes21/2BALLOON 3/a3423/i 343 133413/4 1342/z41/2 1144%14 33411/4 43/i31451/4 114511441/211453 1/a6/a2145141/a6 EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL Los Angeles sheds much-needed illumination support statements enclosed copies few pages mysterious book loaded what first glance seemed just erudite mysteries math over whelming diagrams wondered could decipher fine print Strangely books author seemed talking about models much real-plane long-hair stuff obviously knew score gosh reading things didnt know hooked asked Bentson what book pages came fromand chance something published Ill tell about book think masterpiece Ive read over over am still lets pick up some what Bentson say true modelers dont understand effects ailerons low-speed flight Charles began comments washin FF models especially interesting order find some answers took out Martin Si mons Model Aircraft Aerodynamics Argus Books Ltd 14 St James Rd Watford Herts England Editor may obtain book Zenith Avi ation Books PO Box 1/MA Osceola WI 54020 price $2295 item No 16061B big difference way ailerons act depending whether wing straight tapered since tips straight constant chord wing tend fly zero aerodynamic inci dence experience has tapered wings probably needed bit washout didnt have hence trimming ailerons bit up produced effect washout greatly improved low-speed handling Author As said earlier comments slight up-aileron neutral can helpnot Pattern other all-out aerobatics machines typical sport jobs like Kadet has re flexed ailerons per Claude McCulloughs Sig advice have flaps permit ting drag slightly increases angle attack inner wing compared tips gives washed-out tip effect Bentson tement down-aileron does work misleading t Martins book - indicates up-aileron has nearly equal effect down-aileron curves further indicate beyond 1 5-deg range aileron begins act like spoiler may OK up side certainly down side 2 ratio sounds good Author While knowing up-ai leron does some work always assumed work performed down-aileronen visioning down-aileron creating deep camber high CL portion wing up-aileron reflexed camber Perhaps got 26 Model Aviation SCALE RADIO CONTROL SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS JLLLAI5SEND $1 FOR COMPLETE IUUSTRATED CATALOG EROS MA PAWNEE ST SAN MARCOS CA 9 SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013513 738-1576 Catalog Twelve page-Fully Illustrated complete details . MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC carried away Julius Irving flies higher ballerina lends magic Sixers Moses Malone also shakes up enemy troops 2 ratio refers amount up-move ment aileron equate drag down-aileron turn movements equal demands far larger vertical tail overcome down-aileron yaw plane will turn bank ratIer skew around its vertical axis may able use differen tial throws narrow strip ailerons would require ridiculous amount up compensate down-aileron large throws re quired suggests wider ailerons less movement encourage differ ential linkages proof moreup-than-down thing consider Ercoupe early models using 21 aileron differential limited rudder movement Fred Weick de signer sought prevent amateurs overly crossing controls dreaded downwind turns Because virtually old real planes ignored differential lots rud der used along ailerons pilots know about coordination days fliers Giant Scale models insist fly smoothly must coordi nate ailerons rudder use CAR transmitter mode differential being scarce hens teeth early Ercoupe no rudder barit CAR Bentson Alan Slater 85 still active aviation journalist once told about glider pilot 1 920s mistakenly assumed down-aileron did work eliminated opposite upward action went spiral dive overed difficulty go another resulted death Author Charles isnt trying prove something merely relating strange incident stress point dont know circumstances Shallow no dihedral inadequate vertical tail etc establishes down-aileron yaw could controlled tail rudder response poor man doomed such experiment oversized vertical tail would essential would sufficient dihedral powerful rudder could couple aerody namically opposite rolling mo ment three-channel RC picture Eaglet slight washin warp say right tip produces left turn aileron tip warp removed would produce same turn amount down-aile ron corresponded increased lift generated slightly warped tip As tricky standing headon top flagpole Yes agree up-aile ron does almost much work down-aileron Continued page 28 HB ENGINES 21 Grand Prix SCHNEURLE PORTED B C LETS TALK REAL POWER 105 HP @24000 RPM powerful 21 engine H B has produced date flexible engine ever designed. cylinder head can rotated position exhaust stack Rear Left Right GREAT CHOICE FOR FAN JETS Send Si 00 H B Patch Technical Information IIGENES BAVARIAN PRECISION PRODUCTS CO P0 Box 6 Dept E 22 East Avenue canaan connecticut 06840 WHY SETTLE FOR LESS can have Performance/conomy 15x 6 18x 6- 8 10 __________20x 6-8- 10 __ _________22x 81O $1800 Prices include UPS charges D MASTER CHARGE DVISA DCOD DOHECK DMONEY ORDER Dealers / DIstrIbutors Invited ___ DYNATHRUST PROPS INO 2541 NE lith Court Pompano Beach FL 33062 13059419119 Dynathrusts composite construction provides Unequaled Durability Saves money 100% accurate pitch results Outstanding Performance Air Counts October 1983 27 EXHAUST TO THE RIGHT EXHAUST TO THE LEFT s70O $1000 s140O Bring MonoKate classroom right own TV. Top Elites hour MonoKote Video Tape simple flat surfaces fillets hinges Top Elites video tape teaches basic Monokoting skills Learn right own home. per fect club showings too Purchase $3995 rented return within 30 days $2000 refund VHS BETA format available order receives valuable coupon worth up $7560 off list price 12 six foot rolls MonoKote Top Elite. helping step way Send check money order $3995 name full address choice VHS BETA format rOPFUTE MODELS INC TMonoKote Video Tape Otter 1901 N Narragansett Ave Chicago IL 60639 U 213 764-1490 CakQiC qgg IESN 13400-26 Saticoy Streel North Hollywood Calif 91605 UHEAVY DUTYSPECIAL 825I 4-IN SANDERDELUXE SYSTEM F Flit Adjustable table 101 oz HMiter guideU W4Ch letetm $100 101with metal Tx 4 Sand discs1 $300Nicods Chgr 1 3 CASH$2l95$27495 Ship$ 350CASH $15995 PBuI3inkAIR CAPITAL MODELS Ship $ 650 Lifetime SandingReady-ToFlylFB 100 Tools Grit brazedLess Radio EngineU steel Flat type 11/2 xIgSpan radius type 1 x 9 Giant Schoolyard Model Ship Ig 3/4 radius Span 46 049 061$10504061 Engine Both have coarse &engine350sqinchesReg $17995 CASH $139951 fine grits Sf8 peciy. 2-3 CH RadioShip$2500mu Reg $695 Reg $3995$400OR4VIS4 CASH $495 $2597 MORE L Catalog 75 $200 Foreign Add Calif Sales Tax CASH price shown Cards 5% higher 28 Model Aviation Bentson I experience drastically retrimming ailerons fullscale glider 1935 Rhonbuzzard restored ailerons modified half original length well-known sailplane designer However British Gliding Association test panel would test approve because origi nal aileron travel available permit fly set about find safe solution experience large RC models indicated aile ron differentials about 3 actually im proved aileron response look Schleicher K-l 8 best ailerons fleet simi lar differential retrimmed Rhonbuzzard originally-specified up ward deflection considerably red duced down travelabout 2 1 honor testing machine nearly age flown 12 years delight fly much responsive vintage gliders fitted 100-in Monterey Sail plane trailing edge ailerons along inner two-thirds wing panel Movement limited upward Aileron control crisp fast rate roll strongly recommend arrangement Author I just learned something seem have new toy Bentson I used different approach 11-ft RC Sailplane bought dirt-cheap because handled badly roll Author Charles somethingthe guy ever buy model because flew poorly conventional ailerons readjusted give some good differential rigging rest position five degrees up good handling restored able dispense over sized rudder fit much smaller rudder correct spiral sta bility Author rye just read times Unless requirements neutrally-stable alrplane probably symmetrical section Bentson just said mouthful As hacker think per ceive getting roll control out up-aileron has some down remaining net re sult has achieved differential using traditional methodsyes course could get rid oversized vertical tail have smoother-flying machine Reading book sent think means has less center-of-pressure travel much stable machine about axes earlier stall point though good fliers dont get near stall what paid get good things achieved probably immateri al learn less know did come out Chi nese fortune cookie Bentson You mentioned prob Continued page 128 r N WIN session 4-leA SPORT WINCH LightweIght 34 lbs 155kg battery Surprising performance r develops g HP Reliable & durable ity components Easy use stable electrodynamic brake help prevent backlashe Complete around parachute 600 meters go lb braided nylon line $21500 battery shipping charges included also sell finest 160 lb braided nylon contest towline $lg201600 meters plus shipping Send complete descriptive literature price list 68 Morgan Ave Danbury CT 06810 TEL203 743-3312 FASTEN YOUR SEA TBELTS! .ATTYOU CROSS THE THRESHOLD TO THE BLUE ANGELS EX PERIENCE YOU CAN NOW THRILL TO THE REAL LIFE ADVENTURE WITH SIX DARING MEN AND THEIR FLYING MACHINES SIT IN FRONT ROW COCKPIT AND SENSE THE EMOTIONS AND EXTREME CONCEN TRATION AS YOUR DOUGLAS F-4J PHANTOM GOES THROUGH ITS PACES WITH 32000 POUNDS OF THRUST TO TOP SPEED OF 1600 MPH! FULL COLOR VIDEO WITH NAR RATION AND ACTUAL SOUNDS MUSIC BY FRED MYROW 1/2 VHS D V2 Beta 1 El 1/2 Beta2 El 46 mm VIDEO $6500 K 89 min$8500 El Shipping $250 ea lilust Info Pkg $200 El refundable purchase VISA El MASTERCHARGE El Number_________ date_______ N moo _________StateZip AUDIO VISUALS INTERNATIONAL PO BOX 1390 WOODLAND WASHINGTON 98674 Nick Zirolis F4U CORSAIR 2 Cu size Engines Fibergiass Fuse age & Cowlieg aua able fur lee O5SiQC GIANT RIC SCALE PLAN DESIGNS AT6 TEXAN24 I101Span52700ppUSA POKKER DR27163Tripe$2000ppUSA PAP REARCAT2 186Span$2700ppUSA CURTISS P402 194Span$2700ppUSA FAU CORSAIR2Y 193Span$2700ppUSA Fiberglass Cowliegs & Canopies available ase Send sramp aelaileg urusnures Giaer Scale Accessurius Oar Fans seer Fusfpaid arilbin UgAl last item leave also con cerns Sailpianes sort came form short note photograph Dale Willoughby will know has vast collection documentation photographs Scale modelers available Scale Model Research Orange CA As can seen accompanying photograph subject Dales story electric-powered Sailplane-like model being launched recent US/International F3E Challenge com petition photo taken moment wind gust caused model twist launcher Dale Blacks hand Dale member Harbor Soaring Society long-time RC Sailplane Ilier momentarily forgot model whirling prop its nose quick grab straighten twisting model resulted some nasty cuts left hand Moral Dont grab business end F3E Have safe month John Preston 7012 Elvira Cr Falls Church VA 22042 Fun/Winter Continued page 28 lems inadequately-sized vertical tail area old designs Author case full-scale old-timers am great believer sticking orig inal scale size compensating providing thicker effective sec tion Most modelers completely ignore aerodynamics come tail cut out sheet material cause comparatively small size tail surfaces models need especial attention section used sug gestion square trailing edge good Author talking model aile rons flutterpointed control sur face edges probablyand Joe Bridis constant-thickness ailerons trainers Author I half-buy However smaller model tougher stick scale tail areas time get 1/5-scale larger ability hold hold scale size penal ty becomes increasingly greater de part scale airfoils resort freely flat-bottomed ones Especially thick have serious CP travel increasing angles attack thus require larger tail area symmetrical semi-symmetri cal some other scale section used first case because mon keying around might need 30% stab latter less 20% 15% less ship least 4/2 5 ft span long fuselage arm 10% would feasible some cases talk full-scale powerplane experience glider experience scanty have noted RC models sectioned stabs streamlined double-triangles end-to-end ribs fly better sheet-tailed crates dont have foggiest reason respected pilots say true Bentson Perhaps best argument upward-rigged ailerons comes modern sailplanes camber-changing flaps ailerons arranged move up down flaps Although would preferable take off aerotow flaps slightly down common practice take off least initiate takeoff run flaps up cause better aileron control obtained less likelihood wing tip touching ground case aile ron drag factor because tow attachment nose Humor guys because game plan column has gone up smoke Old-timer modelers Indoors Sailplanes FF Power etc have dozens years hands-on experience better Rubber Scalersand Wakefielders Nordic guys think Tweakers Breathers fine tuning crates seems stream consciousness us books articles aerodynamics appear written folks weve never met greater man able communicate matters far beyond us simple understandable wayand truths revealed witnessed TV worlds greatest musicians con duct Masters Classescelloist Casals exampleyou mesmerized ability true geniuses touch gestures simple words humblest student dare say Ein stein field Dr Lippisch could convey over coffee glimpse im ponderables unattainable lifetime reading Having nothing prove great teachers dont blow us away avalanches math gobbledygook contrived impress peers close loopholes criticism other elitists talking During early 1930s once sat up night reading small book aero dynamics explained airplane flew basics stability factors propeller design designer went about buildingblock process based rudimentary things probably way people like Bellanca Fokker etc wrought magic simple book seemed like Christmas Future So humble author George Page greatest designers age man produced miracles Curtiss years before war Youll never see book like again alas read About Size January 1978 Model Aviation Brad Powers experienced vision basic relationships Powers long re tired few readers knew renowned project engineer Convair participated long string re markable aircraft Somewhat like Page compressed universe rare 128 Model Aviation briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft
Edition: Model Aviation - 1983/10
Page Numbers: 20, 21, 22, 24, 26, 27, 28, 128, 129
FRIDAY MORNINGS lot better Mondays especially after exhil arating evenings flying modified 2/2l Leisure LR5O-powered model cabin configuration make com parisons Parasols have minor draw back especially use high pretty tail can understand consider Pattern jobs have high forward profile assist knife-edge flight put parasol banked turn go hands-off tends tighten turn un corrected begins go spiral dive requires opposite rudder twoand three-channel jobs sup posed have FF-like good gliding abili ty cabin configuration case reduces need use rudder stay hands-off once trimmed circle lift found old FF tricksthat 1fting airfoiled stab well aft CG nice things Climb does appear steep crate just seeming rise until attains high altitudes thought knew about lifting tails Oh yeah honest 9-1 0-mmminimum crate lifeless evening warm-air evenings sunny dura tion 13 mm thermals CG come out parasol 35% chord obviously too far forward big airfoiled stab anybody would settle excellent performance Climb-out analogous Cub Champ both have best rate climb 65 hp 60 mph light planes reduced power youd have retrim higher airspeed best-climb rate new power setting Electric does same thing goes power plateau gradually remove slight up-trim Since crate handles like light plane chop power Jomar propor tional throttle Joe Utasi naturally up-trim required best glide Ele vators gentle Glide duration 45% power run time takes get max altitude Now having moved 250 rnAh re ceiver pack back 1 perfect CG lifting tail 40% 1-deg angular difference first tried 1/16 shim under wing LE increase difference High up crate appeared float slow ly power off duration off 30 sec less sink probably better L/D ratio used full-up for20 Model Aviation U jUSt fun Bill Winter Left Charles Bentson featured column flew fin-mounted Cox 02-powered 54-in-span glider International Veteran Glider Meet fun along Martin Simonswhose book Bill Winter talks about meet storied Wasserkuppe gliding began flourish after 1914-iS war cloudy gusty misty rain late day Simons talked Bentson down after 20 minutes Bentsons fogged glasses forced him go instruments Right Bentsons lovely flying wing glider Use reflexed NACA 23012 eirfpil gives stability spite rectangular no-sweep wing text Bentson adds discussion effects ailerons Please meet old friend Bill Winters New Zealand Bill Mackley 50-year-plus self-designed Free Flight two met Kingston Ont Canada Mackley instruct ing RAF pilots 1-larvards after bomber tour over Europe Mackley now retired after lifetime civil aviation visits Washington DC behalf Flight Safety Foundation model refurbished bright red blue yellow Solarfilm since original bamboo paper wss tatters Baby Cyclone engine still usable tank spark coil missing Winter published picture plane September 1942 issue Air Trails magazine Mackley now installing RC electric power Time marches ward CG although CG moved back crate almost entirely handsofftakeoffs 15-20 ft needing no controls will drop prop pitch 7 7 li-in diameter hopefully faster climb less current consump tion longer runs shut off 5 max 6 mm order have power dragging approaches possible gorounds want keep realistic light-plane piloting technique man thats fun favor trim power l0und tfle ratters oy lius MunIcn tnis Geodetic Galaxie 300 FF 20 years ago Mills 045 diesel Its now converted Leisure LT5O electric power six motor cells Cannon micros elevator rudder weighs 31 oz props 9-7 Torna gets li-mm flights 10-mm motor battery charge Joy fly gentle forgiving great glide says Gus reports Elec tric flying proliferating Long Island Playboys Winters recent tip East Islipchange Westl Winter says really didnt design oncepopular FF previous Air Trails magazine article averaged dimensions areas etc numerous FFs Americas greatest fliers American averagewith precise area used Denny Davis sensa tional Class Hogan Sal Taibi recalls being beaten Indianapolis Junior beginner took first Old-timers will interested full-size detailed plan Class AB version being sold $350 pIus 65 cents postage SAMs Bob Larsh 45 South Whitcomb Ave Indianapolis IN 46241 Arden 19-size three-view based Winter opines vertical tail looks too big now Anyway stood threepoint ROGing single wheel some up-trim -for power off Al though Don Srulls magnificent Electric Sparky flies greater authority spectacular much sur prised find four flights both ships alternating came up four identical flight times Yesterdays flying proved 7-in pitch gets altitude 7-in pitch too much just barely both cases / - 7 4LL AMER/CAN Designed BILL WINTER WINGSPAN 54 WING AREA384 SQ STA6ILlZER 385% MOMENT ARM 39% POWERARDEN 199 L L L L L WF7II-----I-- I I I II NOTE MODEL FEATURED IMPLE 1/8 KEEL FUSELAGE WITH I/B BOTTOM FROM AIR TRAILS CIRCA 1948/49 liii LF C --7 --7 L 1 L L L LLL- ES 0 2 3 4 5 6 7 8 10 1214 16hid Balsa USA Taube modified Larry Hill Pine Barons MAC New Jersey has nice Stand-Off Scale look scalloped trail ing edges surfaces added ailerons covered fuselage back TE 1/64 plywood adding glue rivets painted ply silver Dummied six-cylinder water-cooled engine radiators added top bottom kingposts flying wires wing tail Antique Coy erite Fuselage fin rudder sprayed Krylon 2504 beige hide balsa grain Has OS Max 35 turns 10-5 2-oz prop nut balance flew right off no trim changes has scalelike speed very satisfying project says Larry 0 October 1983 21 GUSTAVE WHITEHEADHERO OR HOAX Thanks recent article Don Berliner American Modeler magazine article William ODwyer 1968 modelers aware Whitehead may have flown 1901 Whitehead affair described some hoax print Ger man immigrant pictured virtual nobody Whitehead nobody respected peers press day found Page newspa pers international magazines articles about Whitehead have appeared through yearsyet virtually no history today mentions him controversial photo has surfaced part presumed van ished photo collection Hoax implies conspiracy Yet 14 witnesses flights found over genera tion research signed affidavits obviously could have consorted Some taped old age Included big-city newspaper editor banker wrote experience 1953 contract between Smithsonian Institution Wright estate compromises Institution relative publication early materials purport question Wrights ing first fly traces back long-ago claims Smithsonian Lang ley flown first No dreamt Whitehead would surface years later ODwyer after Stella Randolph came upon Whitehead artifacts early 30s has spent 20 years $50000 research cru sadehe has six legal-sized cabinets infor mation matched Gustave Whitehead Museum Germany ODwyer has invited Smithsonian examine files German Readers Digest corporate associate American Readers Digest has published book about worlds greatest inventors past 100 years five separate references Whitehead Collec tors will interested block stamps issued German post office bear planform Whitehead machine Whitehead American citizen Since may able read fine print stamps lines bottom read Gus tav Weiskopf 1481901 Karlo Jatho 188 1903 Gebr Wright 17121903 other photos show front back monu ment stands front Whitehead Museum Leutershausen Germany Carl Jatho August 18 1903 flew 581 sq ft biplane 9%-hp engine 59 ft altitude 2% ft Rede signed monoplane 387% sq ft handle wind autumn 1903 attained 196 ft height 11 ft flights did equate Wrights flight certain respects claimed Father Flight Guinness Book Air 7P4 03 ~ an post offices special issue Gustave Whitehead stamps above front back Whitehead monument below Whitehead Museum Leuterhausen Germany Facts Feats specifically lists successful flights still earlier birdmen People getting off groundthat history no mention Whitehead difference between Whiteheads ma chine other early-day contenders except ing Wrights described steerable claimed 1901 flight both sustained steered Whether Whitehead flights ever accepted requiring neutral evaluation bodya respect history requires Whitehead paid due effective anhi-Whitehead written statement out past shows three distinct handwritings signed near future international annual award program will begin under German spon sorshipalong lines Nobel program special awards people high achievement perhaps dozen categories including modeling have already asked yearly nominations five outstanding American modelers Old Gus might aviations Man Iron Mask Bill Winter bad news good news guys using foreign plastic folding props ones tried de cided pathetic Theres break through props least certain kinds mod el will double perhaps triple altitude several excursions pinpoint durationwith spectacular increases rate climb speed length motor run imagine stuff will published soon Back drawing board fellows weather scared off mob just Mad Test Pilot treat ing K&B 60-powered Schlepp POWR young fellow writ ten about some months backlets just call him Brad So made first test hop Jayhawk RTF keep mut tering about Kadet last year two sad OS 35sthe Kadet ended up K&B 40 35s badly beaten varnished works 35 came life smoothed out remarkably after POWR treatment sold Mad Test Pilot little RTF treated engine flew right off proving fast 40 Kadet propped Master Airscrew 9-6 looped rolled inverted wingoveredall first try underestimated ailerons Continued page 24 22 Model Aviation New Specials S795 Look Squadron/Signal Display ALL better Hobby Shops Book Stores favorite Hobby Shop Bookstore does carry Squadron/Signal books send S50 postage & handling Name Address us FREE Squadron/Signal catalog names distributors carry books Squadron/Signal Publication Dept SP2 1115 Crowley Dr Carroilton Tx 75011-5010 set up too much throw Jayhawk almost rolled first correction Max stick movement 1/8 come across things ignore strange aileron installation always cut hole through skin foam lined thin plywood epoxied servo rails front back box Maybe am vamped think RTFs fun would consider aileron trainer Its lively course am Young Brad Midwest Stik also flew LR50 electric-powered Drifter II no gearbut takes off does touch-and-goes has wire skid/strut under forward belly Stik has OS 50 12-oz tank will disappear climbing straight up like spectacular exits published Phil Krafts Stik Grid Leaks early 1960s al ways thought worlds ugliest airplane Some people hate Stiks like some Rubber Scale modelers detest Laceys like Lacey cannot beat Stik flying ability may greatest all-around free-style aerobatics machine ever concocted does things flat wing beyond What things Well hands-off flying young Brad try things Up down field went touch control ex cept turn around although finally would begin vear off its heading Slow flight almost standstill rolls like energetic puppy Brad does intentional flat spins sometimes occur crates aft balance pointand usually cannot recover chap begins regu lar spin slowly feeds opposite aileron Slowly goes flat after pinwheeling perhaps 20 times re laxes control darn thing comes out after five revolutions can blast out rudder control spin slow approach turbulent air keeps pilot busy good air speed can grease in gale must getting old could enjoy building easy flying crate once detested Hang-ups cheat Well top off Mad Test Pilot tore up place Sig Kavalier HP 40 Two years shenanigans unscratched Both crates outer limits joke about re flexes eye perception goes firstlike waiting signals outer space Another strange evening clouds winds odd mix crates some wonderful flying Saturday morning Let see search handle long disserta tion about ailerons RC jobs recent issue seems have accessed everybodys houshold Apple particu larly fine letter Charles W Bentson Continued page 26 24 Model Aviation 6156 Tne Eawrern F-roflf Astounding plastics.. discrir Either Pilotkit.. Sportsman barnstormer.. *Darn Good Airmen.. complete iiflIMAA eSatNYS Residents add 7% Sales tax APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE WHEEIS CONTROLUNEFREE-FLIGHT 000 VINTAGESMOOTHGOLDEN AGENEW sizes2l/CONTOURsIzes21/2BALLOON 3/a3423/i 343 133413/4 1342/z41/2 1144%14 33411/4 43/i31451/4 114511441/211453 1/a6/a2145141/a6 EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL Los Angeles sheds much-needed illumination support statements enclosed copies few pages mysterious book loaded what first glance seemed just erudite mysteries math over whelming diagrams wondered could decipher fine print Strangely books author seemed talking about models much real-plane long-hair stuff obviously knew score gosh reading things didnt know hooked asked Bentson what book pages came fromand chance something published Ill tell about book think masterpiece Ive read over over am still lets pick up some what Bentson say true modelers dont understand effects ailerons low-speed flight Charles began comments washin FF models especially interesting order find some answers took out Martin Si mons Model Aircraft Aerodynamics Argus Books Ltd 14 St James Rd Watford Herts England Editor may obtain book Zenith Avi ation Books PO Box 1/MA Osceola WI 54020 price $2295 item No 16061B big difference way ailerons act depending whether wing straight tapered since tips straight constant chord wing tend fly zero aerodynamic inci dence experience has tapered wings probably needed bit washout didnt have hence trimming ailerons bit up produced effect washout greatly improved low-speed handling Author As said earlier comments slight up-aileron neutral can helpnot Pattern other all-out aerobatics machines typical sport jobs like Kadet has re flexed ailerons per Claude McCulloughs Sig advice have flaps permit ting drag slightly increases angle attack inner wing compared tips gives washed-out tip effect Bentson tement down-aileron does work misleading t Martins book - indicates up-aileron has nearly equal effect down-aileron curves further indicate beyond 1 5-deg range aileron begins act like spoiler may OK up side certainly down side 2 ratio sounds good Author While knowing up-ai leron does some work always assumed work performed down-aileronen visioning down-aileron creating deep camber high CL portion wing up-aileron reflexed camber Perhaps got 26 Model Aviation SCALE RADIO CONTROL SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS JLLLAI5SEND $1 FOR COMPLETE IUUSTRATED CATALOG EROS MA PAWNEE ST SAN MARCOS CA 9 SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013513 738-1576 Catalog Twelve page-Fully Illustrated complete details . MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC carried away Julius Irving flies higher ballerina lends magic Sixers Moses Malone also shakes up enemy troops 2 ratio refers amount up-move ment aileron equate drag down-aileron turn movements equal demands far larger vertical tail overcome down-aileron yaw plane will turn bank ratIer skew around its vertical axis may able use differen tial throws narrow strip ailerons would require ridiculous amount up compensate down-aileron large throws re quired suggests wider ailerons less movement encourage differ ential linkages proof moreup-than-down thing consider Ercoupe early models using 21 aileron differential limited rudder movement Fred Weick de signer sought prevent amateurs overly crossing controls dreaded downwind turns Because virtually old real planes ignored differential lots rud der used along ailerons pilots know about coordination days fliers Giant Scale models insist fly smoothly must coordi nate ailerons rudder use CAR transmitter mode differential being scarce hens teeth early Ercoupe no rudder barit CAR Bentson Alan Slater 85 still active aviation journalist once told about glider pilot 1 920s mistakenly assumed down-aileron did work eliminated opposite upward action went spiral dive overed difficulty go another resulted death Author Charles isnt trying prove something merely relating strange incident stress point dont know circumstances Shallow no dihedral inadequate vertical tail etc establishes down-aileron yaw could controlled tail rudder response poor man doomed such experiment oversized vertical tail would essential would sufficient dihedral powerful rudder could couple aerody namically opposite rolling mo ment three-channel RC picture Eaglet slight washin warp say right tip produces left turn aileron tip warp removed would produce same turn amount down-aile ron corresponded increased lift generated slightly warped tip As tricky standing headon top flagpole Yes agree up-aile ron does almost much work down-aileron Continued page 28 HB ENGINES 21 Grand Prix SCHNEURLE PORTED B C LETS TALK REAL POWER 105 HP @24000 RPM powerful 21 engine H B has produced date flexible engine ever designed. cylinder head can rotated position exhaust stack Rear Left Right GREAT CHOICE FOR FAN JETS Send Si 00 H B Patch Technical Information IIGENES BAVARIAN PRECISION PRODUCTS CO P0 Box 6 Dept E 22 East Avenue canaan connecticut 06840 WHY SETTLE FOR LESS can have Performance/conomy 15x 6 18x 6- 8 10 __________20x 6-8- 10 __ _________22x 81O $1800 Prices include UPS charges D MASTER CHARGE DVISA DCOD DOHECK DMONEY ORDER Dealers / DIstrIbutors Invited ___ DYNATHRUST PROPS INO 2541 NE lith Court Pompano Beach FL 33062 13059419119 Dynathrusts composite construction provides Unequaled Durability Saves money 100% accurate pitch results Outstanding Performance Air Counts October 1983 27 EXHAUST TO THE RIGHT EXHAUST TO THE LEFT s70O $1000 s140O Bring MonoKate classroom right own TV. Top Elites hour MonoKote Video Tape simple flat surfaces fillets hinges Top Elites video tape teaches basic Monokoting skills Learn right own home. per fect club showings too Purchase $3995 rented return within 30 days $2000 refund VHS BETA format available order receives valuable coupon worth up $7560 off list price 12 six foot rolls MonoKote Top Elite. helping step way Send check money order $3995 name full address choice VHS BETA format rOPFUTE MODELS INC TMonoKote Video Tape Otter 1901 N Narragansett Ave Chicago IL 60639 U 213 764-1490 CakQiC qgg IESN 13400-26 Saticoy Streel North Hollywood Calif 91605 UHEAVY DUTYSPECIAL 825I 4-IN SANDERDELUXE SYSTEM F Flit Adjustable table 101 oz HMiter guideU W4Ch letetm $100 101with metal Tx 4 Sand discs1 $300Nicods Chgr 1 3 CASH$2l95$27495 Ship$ 350CASH $15995 PBuI3inkAIR CAPITAL MODELS Ship $ 650 Lifetime SandingReady-ToFlylFB 100 Tools Grit brazedLess Radio EngineU steel Flat type 11/2 xIgSpan radius type 1 x 9 Giant Schoolyard Model Ship Ig 3/4 radius Span 46 049 061$10504061 Engine Both have coarse &engine350sqinchesReg $17995 CASH $139951 fine grits Sf8 peciy. 2-3 CH RadioShip$2500mu Reg $695 Reg $3995$400OR4VIS4 CASH $495 $2597 MORE L Catalog 75 $200 Foreign Add Calif Sales Tax CASH price shown Cards 5% higher 28 Model Aviation Bentson I experience drastically retrimming ailerons fullscale glider 1935 Rhonbuzzard restored ailerons modified half original length well-known sailplane designer However British Gliding Association test panel would test approve because origi nal aileron travel available permit fly set about find safe solution experience large RC models indicated aile ron differentials about 3 actually im proved aileron response look Schleicher K-l 8 best ailerons fleet simi lar differential retrimmed Rhonbuzzard originally-specified up ward deflection considerably red duced down travelabout 2 1 honor testing machine nearly age flown 12 years delight fly much responsive vintage gliders fitted 100-in Monterey Sail plane trailing edge ailerons along inner two-thirds wing panel Movement limited upward Aileron control crisp fast rate roll strongly recommend arrangement Author I just learned something seem have new toy Bentson I used different approach 11-ft RC Sailplane bought dirt-cheap because handled badly roll Author Charles somethingthe guy ever buy model because flew poorly conventional ailerons readjusted give some good differential rigging rest position five degrees up good handling restored able dispense over sized rudder fit much smaller rudder correct spiral sta bility Author rye just read times Unless requirements neutrally-stable alrplane probably symmetrical section Bentson just said mouthful As hacker think per ceive getting roll control out up-aileron has some down remaining net re sult has achieved differential using traditional methodsyes course could get rid oversized vertical tail have smoother-flying machine Reading book sent think means has less center-of-pressure travel much stable machine about axes earlier stall point though good fliers dont get near stall what paid get good things achieved probably immateri al learn less know did come out Chi nese fortune cookie Bentson You mentioned prob Continued page 128 r N WIN session 4-leA SPORT WINCH LightweIght 34 lbs 155kg battery Surprising performance r develops g HP Reliable & durable ity components Easy use stable electrodynamic brake help prevent backlashe Complete around parachute 600 meters go lb braided nylon line $21500 battery shipping charges included also sell finest 160 lb braided nylon contest towline $lg201600 meters plus shipping Send complete descriptive literature price list 68 Morgan Ave Danbury CT 06810 TEL203 743-3312 FASTEN YOUR SEA TBELTS! .ATTYOU CROSS THE THRESHOLD TO THE BLUE ANGELS EX PERIENCE YOU CAN NOW THRILL TO THE REAL LIFE ADVENTURE WITH SIX DARING MEN AND THEIR FLYING MACHINES SIT IN FRONT ROW COCKPIT AND SENSE THE EMOTIONS AND EXTREME CONCEN TRATION AS YOUR DOUGLAS F-4J PHANTOM GOES THROUGH ITS PACES WITH 32000 POUNDS OF THRUST TO TOP SPEED OF 1600 MPH! FULL COLOR VIDEO WITH NAR RATION AND ACTUAL SOUNDS MUSIC BY FRED MYROW 1/2 VHS D V2 Beta 1 El 1/2 Beta2 El 46 mm VIDEO $6500 K 89 min$8500 El Shipping $250 ea lilust Info Pkg $200 El refundable purchase VISA El MASTERCHARGE El Number_________ date_______ N moo _________StateZip AUDIO VISUALS INTERNATIONAL PO BOX 1390 WOODLAND WASHINGTON 98674 Nick Zirolis F4U CORSAIR 2 Cu size Engines Fibergiass Fuse age & Cowlieg aua able fur lee O5SiQC GIANT RIC SCALE PLAN DESIGNS AT6 TEXAN24 I101Span52700ppUSA POKKER DR27163Tripe$2000ppUSA PAP REARCAT2 186Span$2700ppUSA CURTISS P402 194Span$2700ppUSA FAU CORSAIR2Y 193Span$2700ppUSA Fiberglass Cowliegs & Canopies available ase Send sramp aelaileg urusnures Giaer Scale Accessurius Oar Fans seer Fusfpaid arilbin UgAl last item leave also con cerns Sailpianes sort came form short note photograph Dale Willoughby will know has vast collection documentation photographs Scale modelers available Scale Model Research Orange CA As can seen accompanying photograph subject Dales story electric-powered Sailplane-like model being launched recent US/International F3E Challenge com petition photo taken moment wind gust caused model twist launcher Dale Blacks hand Dale member Harbor Soaring Society long-time RC Sailplane Ilier momentarily forgot model whirling prop its nose quick grab straighten twisting model resulted some nasty cuts left hand Moral Dont grab business end F3E Have safe month John Preston 7012 Elvira Cr Falls Church VA 22042 Fun/Winter Continued page 28 lems inadequately-sized vertical tail area old designs Author case full-scale old-timers am great believer sticking orig inal scale size compensating providing thicker effective sec tion Most modelers completely ignore aerodynamics come tail cut out sheet material cause comparatively small size tail surfaces models need especial attention section used sug gestion square trailing edge good Author talking model aile rons flutterpointed control sur face edges probablyand Joe Bridis constant-thickness ailerons trainers Author I half-buy However smaller model tougher stick scale tail areas time get 1/5-scale larger ability hold hold scale size penal ty becomes increasingly greater de part scale airfoils resort freely flat-bottomed ones Especially thick have serious CP travel increasing angles attack thus require larger tail area symmetrical semi-symmetri cal some other scale section used first case because mon keying around might need 30% stab latter less 20% 15% less ship least 4/2 5 ft span long fuselage arm 10% would feasible some cases talk full-scale powerplane experience glider experience scanty have noted RC models sectioned stabs streamlined double-triangles end-to-end ribs fly better sheet-tailed crates dont have foggiest reason respected pilots say true Bentson Perhaps best argument upward-rigged ailerons comes modern sailplanes camber-changing flaps ailerons arranged move up down flaps Although would preferable take off aerotow flaps slightly down common practice take off least initiate takeoff run flaps up cause better aileron control obtained less likelihood wing tip touching ground case aile ron drag factor because tow attachment nose Humor guys because game plan column has gone up smoke Old-timer modelers Indoors Sailplanes FF Power etc have dozens years hands-on experience better Rubber Scalersand Wakefielders Nordic guys think Tweakers Breathers fine tuning crates seems stream consciousness us books articles aerodynamics appear written folks weve never met greater man able communicate matters far beyond us simple understandable wayand truths revealed witnessed TV worlds greatest musicians con duct Masters Classescelloist Casals exampleyou mesmerized ability true geniuses touch gestures simple words humblest student dare say Ein stein field Dr Lippisch could convey over coffee glimpse im ponderables unattainable lifetime reading Having nothing prove great teachers dont blow us away avalanches math gobbledygook contrived impress peers close loopholes criticism other elitists talking During early 1930s once sat up night reading small book aero dynamics explained airplane flew basics stability factors propeller design designer went about buildingblock process based rudimentary things probably way people like Bellanca Fokker etc wrought magic simple book seemed like Christmas Future So humble author George Page greatest designers age man produced miracles Curtiss years before war Youll never see book like again alas read About Size January 1978 Model Aviation Brad Powers experienced vision basic relationships Powers long re tired few readers knew renowned project engineer Convair participated long string re markable aircraft Somewhat like Page compressed universe rare 128 Model Aviation briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft
Edition: Model Aviation - 1983/10
Page Numbers: 20, 21, 22, 24, 26, 27, 28, 128, 129
FRIDAY MORNINGS lot better Mondays especially after exhil arating evenings flying modified 2/2l Leisure LR5O-powered model cabin configuration make com parisons Parasols have minor draw back especially use high pretty tail can understand consider Pattern jobs have high forward profile assist knife-edge flight put parasol banked turn go hands-off tends tighten turn un corrected begins go spiral dive requires opposite rudder twoand three-channel jobs sup posed have FF-like good gliding abili ty cabin configuration case reduces need use rudder stay hands-off once trimmed circle lift found old FF tricksthat 1fting airfoiled stab well aft CG nice things Climb does appear steep crate just seeming rise until attains high altitudes thought knew about lifting tails Oh yeah honest 9-1 0-mmminimum crate lifeless evening warm-air evenings sunny dura tion 13 mm thermals CG come out parasol 35% chord obviously too far forward big airfoiled stab anybody would settle excellent performance Climb-out analogous Cub Champ both have best rate climb 65 hp 60 mph light planes reduced power youd have retrim higher airspeed best-climb rate new power setting Electric does same thing goes power plateau gradually remove slight up-trim Since crate handles like light plane chop power Jomar propor tional throttle Joe Utasi naturally up-trim required best glide Ele vators gentle Glide duration 45% power run time takes get max altitude Now having moved 250 rnAh re ceiver pack back 1 perfect CG lifting tail 40% 1-deg angular difference first tried 1/16 shim under wing LE increase difference High up crate appeared float slow ly power off duration off 30 sec less sink probably better L/D ratio used full-up for20 Model Aviation U jUSt fun Bill Winter Left Charles Bentson featured column flew fin-mounted Cox 02-powered 54-in-span glider International Veteran Glider Meet fun along Martin Simonswhose book Bill Winter talks about meet storied Wasserkuppe gliding began flourish after 1914-iS war cloudy gusty misty rain late day Simons talked Bentson down after 20 minutes Bentsons fogged glasses forced him go instruments Right Bentsons lovely flying wing glider Use reflexed NACA 23012 eirfpil gives stability spite rectangular no-sweep wing text Bentson adds discussion effects ailerons Please meet old friend Bill Winters New Zealand Bill Mackley 50-year-plus self-designed Free Flight two met Kingston Ont Canada Mackley instruct ing RAF pilots 1-larvards after bomber tour over Europe Mackley now retired after lifetime civil aviation visits Washington DC behalf Flight Safety Foundation model refurbished bright red blue yellow Solarfilm since original bamboo paper wss tatters Baby Cyclone engine still usable tank spark coil missing Winter published picture plane September 1942 issue Air Trails magazine Mackley now installing RC electric power Time marches ward CG although CG moved back crate almost entirely handsofftakeoffs 15-20 ft needing no controls will drop prop pitch 7 7 li-in diameter hopefully faster climb less current consump tion longer runs shut off 5 max 6 mm order have power dragging approaches possible gorounds want keep realistic light-plane piloting technique man thats fun favor trim power l0und tfle ratters oy lius MunIcn tnis Geodetic Galaxie 300 FF 20 years ago Mills 045 diesel Its now converted Leisure LT5O electric power six motor cells Cannon micros elevator rudder weighs 31 oz props 9-7 Torna gets li-mm flights 10-mm motor battery charge Joy fly gentle forgiving great glide says Gus reports Elec tric flying proliferating Long Island Playboys Winters recent tip East Islipchange Westl Winter says really didnt design oncepopular FF previous Air Trails magazine article averaged dimensions areas etc numerous FFs Americas greatest fliers American averagewith precise area used Denny Davis sensa tional Class Hogan Sal Taibi recalls being beaten Indianapolis Junior beginner took first Old-timers will interested full-size detailed plan Class AB version being sold $350 pIus 65 cents postage SAMs Bob Larsh 45 South Whitcomb Ave Indianapolis IN 46241 Arden 19-size three-view based Winter opines vertical tail looks too big now Anyway stood threepoint ROGing single wheel some up-trim -for power off Al though Don Srulls magnificent Electric Sparky flies greater authority spectacular much sur prised find four flights both ships alternating came up four identical flight times Yesterdays flying proved 7-in pitch gets altitude 7-in pitch too much just barely both cases / - 7 4LL AMER/CAN Designed BILL WINTER WINGSPAN 54 WING AREA384 SQ STA6ILlZER 385% MOMENT ARM 39% POWERARDEN 199 L L L L L WF7II-----I-- I I I II NOTE MODEL FEATURED IMPLE 1/8 KEEL FUSELAGE WITH I/B BOTTOM FROM AIR TRAILS CIRCA 1948/49 liii LF C --7 --7 L 1 L L L LLL- ES 0 2 3 4 5 6 7 8 10 1214 16hid Balsa USA Taube modified Larry Hill Pine Barons MAC New Jersey has nice Stand-Off Scale look scalloped trail ing edges surfaces added ailerons covered fuselage back TE 1/64 plywood adding glue rivets painted ply silver Dummied six-cylinder water-cooled engine radiators added top bottom kingposts flying wires wing tail Antique Coy erite Fuselage fin rudder sprayed Krylon 2504 beige hide balsa grain Has OS Max 35 turns 10-5 2-oz prop nut balance flew right off no trim changes has scalelike speed very satisfying project says Larry 0 October 1983 21 GUSTAVE WHITEHEADHERO OR HOAX Thanks recent article Don Berliner American Modeler magazine article William ODwyer 1968 modelers aware Whitehead may have flown 1901 Whitehead affair described some hoax print Ger man immigrant pictured virtual nobody Whitehead nobody respected peers press day found Page newspa pers international magazines articles about Whitehead have appeared through yearsyet virtually no history today mentions him controversial photo has surfaced part presumed van ished photo collection Hoax implies conspiracy Yet 14 witnesses flights found over genera tion research signed affidavits obviously could have consorted Some taped old age Included big-city newspaper editor banker wrote experience 1953 contract between Smithsonian Institution Wright estate compromises Institution relative publication early materials purport question Wrights ing first fly traces back long-ago claims Smithsonian Lang ley flown first No dreamt Whitehead would surface years later ODwyer after Stella Randolph came upon Whitehead artifacts early 30s has spent 20 years $50000 research cru sadehe has six legal-sized cabinets infor mation matched Gustave Whitehead Museum Germany ODwyer has invited Smithsonian examine files German Readers Digest corporate associate American Readers Digest has published book about worlds greatest inventors past 100 years five separate references Whitehead Collec tors will interested block stamps issued German post office bear planform Whitehead machine Whitehead American citizen Since may able read fine print stamps lines bottom read Gus tav Weiskopf 1481901 Karlo Jatho 188 1903 Gebr Wright 17121903 other photos show front back monu ment stands front Whitehead Museum Leutershausen Germany Carl Jatho August 18 1903 flew 581 sq ft biplane 9%-hp engine 59 ft altitude 2% ft Rede signed monoplane 387% sq ft handle wind autumn 1903 attained 196 ft height 11 ft flights did equate Wrights flight certain respects claimed Father Flight Guinness Book Air 7P4 03 ~ an post offices special issue Gustave Whitehead stamps above front back Whitehead monument below Whitehead Museum Leuterhausen Germany Facts Feats specifically lists successful flights still earlier birdmen People getting off groundthat history no mention Whitehead difference between Whiteheads ma chine other early-day contenders except ing Wrights described steerable claimed 1901 flight both sustained steered Whether Whitehead flights ever accepted requiring neutral evaluation bodya respect history requires Whitehead paid due effective anhi-Whitehead written statement out past shows three distinct handwritings signed near future international annual award program will begin under German spon sorshipalong lines Nobel program special awards people high achievement perhaps dozen categories including modeling have already asked yearly nominations five outstanding American modelers Old Gus might aviations Man Iron Mask Bill Winter bad news good news guys using foreign plastic folding props ones tried de cided pathetic Theres break through props least certain kinds mod el will double perhaps triple altitude several excursions pinpoint durationwith spectacular increases rate climb speed length motor run imagine stuff will published soon Back drawing board fellows weather scared off mob just Mad Test Pilot treat ing K&B 60-powered Schlepp POWR young fellow writ ten about some months backlets just call him Brad So made first test hop Jayhawk RTF keep mut tering about Kadet last year two sad OS 35sthe Kadet ended up K&B 40 35s badly beaten varnished works 35 came life smoothed out remarkably after POWR treatment sold Mad Test Pilot little RTF treated engine flew right off proving fast 40 Kadet propped Master Airscrew 9-6 looped rolled inverted wingoveredall first try underestimated ailerons Continued page 24 22 Model Aviation New Specials S795 Look Squadron/Signal Display ALL better Hobby Shops Book Stores favorite Hobby Shop Bookstore does carry Squadron/Signal books send S50 postage & handling Name Address us FREE Squadron/Signal catalog names distributors carry books Squadron/Signal Publication Dept SP2 1115 Crowley Dr Carroilton Tx 75011-5010 set up too much throw Jayhawk almost rolled first correction Max stick movement 1/8 come across things ignore strange aileron installation always cut hole through skin foam lined thin plywood epoxied servo rails front back box Maybe am vamped think RTFs fun would consider aileron trainer Its lively course am Young Brad Midwest Stik also flew LR50 electric-powered Drifter II no gearbut takes off does touch-and-goes has wire skid/strut under forward belly Stik has OS 50 12-oz tank will disappear climbing straight up like spectacular exits published Phil Krafts Stik Grid Leaks early 1960s al ways thought worlds ugliest airplane Some people hate Stiks like some Rubber Scale modelers detest Laceys like Lacey cannot beat Stik flying ability may greatest all-around free-style aerobatics machine ever concocted does things flat wing beyond What things Well hands-off flying young Brad try things Up down field went touch control ex cept turn around although finally would begin vear off its heading Slow flight almost standstill rolls like energetic puppy Brad does intentional flat spins sometimes occur crates aft balance pointand usually cannot recover chap begins regu lar spin slowly feeds opposite aileron Slowly goes flat after pinwheeling perhaps 20 times re laxes control darn thing comes out after five revolutions can blast out rudder control spin slow approach turbulent air keeps pilot busy good air speed can grease in gale must getting old could enjoy building easy flying crate once detested Hang-ups cheat Well top off Mad Test Pilot tore up place Sig Kavalier HP 40 Two years shenanigans unscratched Both crates outer limits joke about re flexes eye perception goes firstlike waiting signals outer space Another strange evening clouds winds odd mix crates some wonderful flying Saturday morning Let see search handle long disserta tion about ailerons RC jobs recent issue seems have accessed everybodys houshold Apple particu larly fine letter Charles W Bentson Continued page 26 24 Model Aviation 6156 Tne Eawrern F-roflf Astounding plastics.. discrir Either Pilotkit.. Sportsman barnstormer.. *Darn Good Airmen.. complete iiflIMAA eSatNYS Residents add 7% Sales tax APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE WHEEIS CONTROLUNEFREE-FLIGHT 000 VINTAGESMOOTHGOLDEN AGENEW sizes2l/CONTOURsIzes21/2BALLOON 3/a3423/i 343 133413/4 1342/z41/2 1144%14 33411/4 43/i31451/4 114511441/211453 1/a6/a2145141/a6 EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL Los Angeles sheds much-needed illumination support statements enclosed copies few pages mysterious book loaded what first glance seemed just erudite mysteries math over whelming diagrams wondered could decipher fine print Strangely books author seemed talking about models much real-plane long-hair stuff obviously knew score gosh reading things didnt know hooked asked Bentson what book pages came fromand chance something published Ill tell about book think masterpiece Ive read over over am still lets pick up some what Bentson say true modelers dont understand effects ailerons low-speed flight Charles began comments washin FF models especially interesting order find some answers took out Martin Si mons Model Aircraft Aerodynamics Argus Books Ltd 14 St James Rd Watford Herts England Editor may obtain book Zenith Avi ation Books PO Box 1/MA Osceola WI 54020 price $2295 item No 16061B big difference way ailerons act depending whether wing straight tapered since tips straight constant chord wing tend fly zero aerodynamic inci dence experience has tapered wings probably needed bit washout didnt have hence trimming ailerons bit up produced effect washout greatly improved low-speed handling Author As said earlier comments slight up-aileron neutral can helpnot Pattern other all-out aerobatics machines typical sport jobs like Kadet has re flexed ailerons per Claude McCulloughs Sig advice have flaps permit ting drag slightly increases angle attack inner wing compared tips gives washed-out tip effect Bentson tement down-aileron does work misleading t Martins book - indicates up-aileron has nearly equal effect down-aileron curves further indicate beyond 1 5-deg range aileron begins act like spoiler may OK up side certainly down side 2 ratio sounds good Author While knowing up-ai leron does some work always assumed work performed down-aileronen visioning down-aileron creating deep camber high CL portion wing up-aileron reflexed camber Perhaps got 26 Model Aviation SCALE RADIO CONTROL SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS JLLLAI5SEND $1 FOR COMPLETE IUUSTRATED CATALOG EROS MA PAWNEE ST SAN MARCOS CA 9 SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013513 738-1576 Catalog Twelve page-Fully Illustrated complete details . MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC carried away Julius Irving flies higher ballerina lends magic Sixers Moses Malone also shakes up enemy troops 2 ratio refers amount up-move ment aileron equate drag down-aileron turn movements equal demands far larger vertical tail overcome down-aileron yaw plane will turn bank ratIer skew around its vertical axis may able use differen tial throws narrow strip ailerons would require ridiculous amount up compensate down-aileron large throws re quired suggests wider ailerons less movement encourage differ ential linkages proof moreup-than-down thing consider Ercoupe early models using 21 aileron differential limited rudder movement Fred Weick de signer sought prevent amateurs overly crossing controls dreaded downwind turns Because virtually old real planes ignored differential lots rud der used along ailerons pilots know about coordination days fliers Giant Scale models insist fly smoothly must coordi nate ailerons rudder use CAR transmitter mode differential being scarce hens teeth early Ercoupe no rudder barit CAR Bentson Alan Slater 85 still active aviation journalist once told about glider pilot 1 920s mistakenly assumed down-aileron did work eliminated opposite upward action went spiral dive overed difficulty go another resulted death Author Charles isnt trying prove something merely relating strange incident stress point dont know circumstances Shallow no dihedral inadequate vertical tail etc establishes down-aileron yaw could controlled tail rudder response poor man doomed such experiment oversized vertical tail would essential would sufficient dihedral powerful rudder could couple aerody namically opposite rolling mo ment three-channel RC picture Eaglet slight washin warp say right tip produces left turn aileron tip warp removed would produce same turn amount down-aile ron corresponded increased lift generated slightly warped tip As tricky standing headon top flagpole Yes agree up-aile ron does almost much work down-aileron Continued page 28 HB ENGINES 21 Grand Prix SCHNEURLE PORTED B C LETS TALK REAL POWER 105 HP @24000 RPM powerful 21 engine H B has produced date flexible engine ever designed. cylinder head can rotated position exhaust stack Rear Left Right GREAT CHOICE FOR FAN JETS Send Si 00 H B Patch Technical Information IIGENES BAVARIAN PRECISION PRODUCTS CO P0 Box 6 Dept E 22 East Avenue canaan connecticut 06840 WHY SETTLE FOR LESS can have Performance/conomy 15x 6 18x 6- 8 10 __________20x 6-8- 10 __ _________22x 81O $1800 Prices include UPS charges D MASTER CHARGE DVISA DCOD DOHECK DMONEY ORDER Dealers / DIstrIbutors Invited ___ DYNATHRUST PROPS INO 2541 NE lith Court Pompano Beach FL 33062 13059419119 Dynathrusts composite construction provides Unequaled Durability Saves money 100% accurate pitch results Outstanding Performance Air Counts October 1983 27 EXHAUST TO THE RIGHT EXHAUST TO THE LEFT s70O $1000 s140O Bring MonoKate classroom right own TV. Top Elites hour MonoKote Video Tape simple flat surfaces fillets hinges Top Elites video tape teaches basic Monokoting skills Learn right own home. per fect club showings too Purchase $3995 rented return within 30 days $2000 refund VHS BETA format available order receives valuable coupon worth up $7560 off list price 12 six foot rolls MonoKote Top Elite. helping step way Send check money order $3995 name full address choice VHS BETA format rOPFUTE MODELS INC TMonoKote Video Tape Otter 1901 N Narragansett Ave Chicago IL 60639 U 213 764-1490 CakQiC qgg IESN 13400-26 Saticoy Streel North Hollywood Calif 91605 UHEAVY DUTYSPECIAL 825I 4-IN SANDERDELUXE SYSTEM F Flit Adjustable table 101 oz HMiter guideU W4Ch letetm $100 101with metal Tx 4 Sand discs1 $300Nicods Chgr 1 3 CASH$2l95$27495 Ship$ 350CASH $15995 PBuI3inkAIR CAPITAL MODELS Ship $ 650 Lifetime SandingReady-ToFlylFB 100 Tools Grit brazedLess Radio EngineU steel Flat type 11/2 xIgSpan radius type 1 x 9 Giant Schoolyard Model Ship Ig 3/4 radius Span 46 049 061$10504061 Engine Both have coarse &engine350sqinchesReg $17995 CASH $139951 fine grits Sf8 peciy. 2-3 CH RadioShip$2500mu Reg $695 Reg $3995$400OR4VIS4 CASH $495 $2597 MORE L Catalog 75 $200 Foreign Add Calif Sales Tax CASH price shown Cards 5% higher 28 Model Aviation Bentson I experience drastically retrimming ailerons fullscale glider 1935 Rhonbuzzard restored ailerons modified half original length well-known sailplane designer However British Gliding Association test panel would test approve because origi nal aileron travel available permit fly set about find safe solution experience large RC models indicated aile ron differentials about 3 actually im proved aileron response look Schleicher K-l 8 best ailerons fleet simi lar differential retrimmed Rhonbuzzard originally-specified up ward deflection considerably red duced down travelabout 2 1 honor testing machine nearly age flown 12 years delight fly much responsive vintage gliders fitted 100-in Monterey Sail plane trailing edge ailerons along inner two-thirds wing panel Movement limited upward Aileron control crisp fast rate roll strongly recommend arrangement Author I just learned something seem have new toy Bentson I used different approach 11-ft RC Sailplane bought dirt-cheap because handled badly roll Author Charles somethingthe guy ever buy model because flew poorly conventional ailerons readjusted give some good differential rigging rest position five degrees up good handling restored able dispense over sized rudder fit much smaller rudder correct spiral sta bility Author rye just read times Unless requirements neutrally-stable alrplane probably symmetrical section Bentson just said mouthful As hacker think per ceive getting roll control out up-aileron has some down remaining net re sult has achieved differential using traditional methodsyes course could get rid oversized vertical tail have smoother-flying machine Reading book sent think means has less center-of-pressure travel much stable machine about axes earlier stall point though good fliers dont get near stall what paid get good things achieved probably immateri al learn less know did come out Chi nese fortune cookie Bentson You mentioned prob Continued page 128 r N WIN session 4-leA SPORT WINCH LightweIght 34 lbs 155kg battery Surprising performance r develops g HP Reliable & durable ity components Easy use stable electrodynamic brake help prevent backlashe Complete around parachute 600 meters go lb braided nylon line $21500 battery shipping charges included also sell finest 160 lb braided nylon contest towline $lg201600 meters plus shipping Send complete descriptive literature price list 68 Morgan Ave Danbury CT 06810 TEL203 743-3312 FASTEN YOUR SEA TBELTS! .ATTYOU CROSS THE THRESHOLD TO THE BLUE ANGELS EX PERIENCE YOU CAN NOW THRILL TO THE REAL LIFE ADVENTURE WITH SIX DARING MEN AND THEIR FLYING MACHINES SIT IN FRONT ROW COCKPIT AND SENSE THE EMOTIONS AND EXTREME CONCEN TRATION AS YOUR DOUGLAS F-4J PHANTOM GOES THROUGH ITS PACES WITH 32000 POUNDS OF THRUST TO TOP SPEED OF 1600 MPH! FULL COLOR VIDEO WITH NAR RATION AND ACTUAL SOUNDS MUSIC BY FRED MYROW 1/2 VHS D V2 Beta 1 El 1/2 Beta2 El 46 mm VIDEO $6500 K 89 min$8500 El Shipping $250 ea lilust Info Pkg $200 El refundable purchase VISA El MASTERCHARGE El Number_________ date_______ N moo _________StateZip AUDIO VISUALS INTERNATIONAL PO BOX 1390 WOODLAND WASHINGTON 98674 Nick Zirolis F4U CORSAIR 2 Cu size Engines Fibergiass Fuse age & Cowlieg aua able fur lee O5SiQC GIANT RIC SCALE PLAN DESIGNS AT6 TEXAN24 I101Span52700ppUSA POKKER DR27163Tripe$2000ppUSA PAP REARCAT2 186Span$2700ppUSA CURTISS P402 194Span$2700ppUSA FAU CORSAIR2Y 193Span$2700ppUSA Fiberglass Cowliegs & Canopies available ase Send sramp aelaileg urusnures Giaer Scale Accessurius Oar Fans seer Fusfpaid arilbin UgAl last item leave also con cerns Sailpianes sort came form short note photograph Dale Willoughby will know has vast collection documentation photographs Scale modelers available Scale Model Research Orange CA As can seen accompanying photograph subject Dales story electric-powered Sailplane-like model being launched recent US/International F3E Challenge com petition photo taken moment wind gust caused model twist launcher Dale Blacks hand Dale member Harbor Soaring Society long-time RC Sailplane Ilier momentarily forgot model whirling prop its nose quick grab straighten twisting model resulted some nasty cuts left hand Moral Dont grab business end F3E Have safe month John Preston 7012 Elvira Cr Falls Church VA 22042 Fun/Winter Continued page 28 lems inadequately-sized vertical tail area old designs Author case full-scale old-timers am great believer sticking orig inal scale size compensating providing thicker effective sec tion Most modelers completely ignore aerodynamics come tail cut out sheet material cause comparatively small size tail surfaces models need especial attention section used sug gestion square trailing edge good Author talking model aile rons flutterpointed control sur face edges probablyand Joe Bridis constant-thickness ailerons trainers Author I half-buy However smaller model tougher stick scale tail areas time get 1/5-scale larger ability hold hold scale size penal ty becomes increasingly greater de part scale airfoils resort freely flat-bottomed ones Especially thick have serious CP travel increasing angles attack thus require larger tail area symmetrical semi-symmetri cal some other scale section used first case because mon keying around might need 30% stab latter less 20% 15% less ship least 4/2 5 ft span long fuselage arm 10% would feasible some cases talk full-scale powerplane experience glider experience scanty have noted RC models sectioned stabs streamlined double-triangles end-to-end ribs fly better sheet-tailed crates dont have foggiest reason respected pilots say true Bentson Perhaps best argument upward-rigged ailerons comes modern sailplanes camber-changing flaps ailerons arranged move up down flaps Although would preferable take off aerotow flaps slightly down common practice take off least initiate takeoff run flaps up cause better aileron control obtained less likelihood wing tip touching ground case aile ron drag factor because tow attachment nose Humor guys because game plan column has gone up smoke Old-timer modelers Indoors Sailplanes FF Power etc have dozens years hands-on experience better Rubber Scalersand Wakefielders Nordic guys think Tweakers Breathers fine tuning crates seems stream consciousness us books articles aerodynamics appear written folks weve never met greater man able communicate matters far beyond us simple understandable wayand truths revealed witnessed TV worlds greatest musicians con duct Masters Classescelloist Casals exampleyou mesmerized ability true geniuses touch gestures simple words humblest student dare say Ein stein field Dr Lippisch could convey over coffee glimpse im ponderables unattainable lifetime reading Having nothing prove great teachers dont blow us away avalanches math gobbledygook contrived impress peers close loopholes criticism other elitists talking During early 1930s once sat up night reading small book aero dynamics explained airplane flew basics stability factors propeller design designer went about buildingblock process based rudimentary things probably way people like Bellanca Fokker etc wrought magic simple book seemed like Christmas Future So humble author George Page greatest designers age man produced miracles Curtiss years before war Youll never see book like again alas read About Size January 1978 Model Aviation Brad Powers experienced vision basic relationships Powers long re tired few readers knew renowned project engineer Convair participated long string re markable aircraft Somewhat like Page compressed universe rare 128 Model Aviation briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft
Edition: Model Aviation - 1983/10
Page Numbers: 20, 21, 22, 24, 26, 27, 28, 128, 129
FRIDAY MORNINGS lot better Mondays especially after exhil arating evenings flying modified 2/2l Leisure LR5O-powered model cabin configuration make com parisons Parasols have minor draw back especially use high pretty tail can understand consider Pattern jobs have high forward profile assist knife-edge flight put parasol banked turn go hands-off tends tighten turn un corrected begins go spiral dive requires opposite rudder twoand three-channel jobs sup posed have FF-like good gliding abili ty cabin configuration case reduces need use rudder stay hands-off once trimmed circle lift found old FF tricksthat 1fting airfoiled stab well aft CG nice things Climb does appear steep crate just seeming rise until attains high altitudes thought knew about lifting tails Oh yeah honest 9-1 0-mmminimum crate lifeless evening warm-air evenings sunny dura tion 13 mm thermals CG come out parasol 35% chord obviously too far forward big airfoiled stab anybody would settle excellent performance Climb-out analogous Cub Champ both have best rate climb 65 hp 60 mph light planes reduced power youd have retrim higher airspeed best-climb rate new power setting Electric does same thing goes power plateau gradually remove slight up-trim Since crate handles like light plane chop power Jomar propor tional throttle Joe Utasi naturally up-trim required best glide Ele vators gentle Glide duration 45% power run time takes get max altitude Now having moved 250 rnAh re ceiver pack back 1 perfect CG lifting tail 40% 1-deg angular difference first tried 1/16 shim under wing LE increase difference High up crate appeared float slow ly power off duration off 30 sec less sink probably better L/D ratio used full-up for20 Model Aviation U jUSt fun Bill Winter Left Charles Bentson featured column flew fin-mounted Cox 02-powered 54-in-span glider International Veteran Glider Meet fun along Martin Simonswhose book Bill Winter talks about meet storied Wasserkuppe gliding began flourish after 1914-iS war cloudy gusty misty rain late day Simons talked Bentson down after 20 minutes Bentsons fogged glasses forced him go instruments Right Bentsons lovely flying wing glider Use reflexed NACA 23012 eirfpil gives stability spite rectangular no-sweep wing text Bentson adds discussion effects ailerons Please meet old friend Bill Winters New Zealand Bill Mackley 50-year-plus self-designed Free Flight two met Kingston Ont Canada Mackley instruct ing RAF pilots 1-larvards after bomber tour over Europe Mackley now retired after lifetime civil aviation visits Washington DC behalf Flight Safety Foundation model refurbished bright red blue yellow Solarfilm since original bamboo paper wss tatters Baby Cyclone engine still usable tank spark coil missing Winter published picture plane September 1942 issue Air Trails magazine Mackley now installing RC electric power Time marches ward CG although CG moved back crate almost entirely handsofftakeoffs 15-20 ft needing no controls will drop prop pitch 7 7 li-in diameter hopefully faster climb less current consump tion longer runs shut off 5 max 6 mm order have power dragging approaches possible gorounds want keep realistic light-plane piloting technique man thats fun favor trim power l0und tfle ratters oy lius MunIcn tnis Geodetic Galaxie 300 FF 20 years ago Mills 045 diesel Its now converted Leisure LT5O electric power six motor cells Cannon micros elevator rudder weighs 31 oz props 9-7 Torna gets li-mm flights 10-mm motor battery charge Joy fly gentle forgiving great glide says Gus reports Elec tric flying proliferating Long Island Playboys Winters recent tip East Islipchange Westl Winter says really didnt design oncepopular FF previous Air Trails magazine article averaged dimensions areas etc numerous FFs Americas greatest fliers American averagewith precise area used Denny Davis sensa tional Class Hogan Sal Taibi recalls being beaten Indianapolis Junior beginner took first Old-timers will interested full-size detailed plan Class AB version being sold $350 pIus 65 cents postage SAMs Bob Larsh 45 South Whitcomb Ave Indianapolis IN 46241 Arden 19-size three-view based Winter opines vertical tail looks too big now Anyway stood threepoint ROGing single wheel some up-trim -for power off Al though Don Srulls magnificent Electric Sparky flies greater authority spectacular much sur prised find four flights both ships alternating came up four identical flight times Yesterdays flying proved 7-in pitch gets altitude 7-in pitch too much just barely both cases / - 7 4LL AMER/CAN Designed BILL WINTER WINGSPAN 54 WING AREA384 SQ STA6ILlZER 385% MOMENT ARM 39% POWERARDEN 199 L L L L L WF7II-----I-- I I I II NOTE MODEL FEATURED IMPLE 1/8 KEEL FUSELAGE WITH I/B BOTTOM FROM AIR TRAILS CIRCA 1948/49 liii LF C --7 --7 L 1 L L L LLL- ES 0 2 3 4 5 6 7 8 10 1214 16hid Balsa USA Taube modified Larry Hill Pine Barons MAC New Jersey has nice Stand-Off Scale look scalloped trail ing edges surfaces added ailerons covered fuselage back TE 1/64 plywood adding glue rivets painted ply silver Dummied six-cylinder water-cooled engine radiators added top bottom kingposts flying wires wing tail Antique Coy erite Fuselage fin rudder sprayed Krylon 2504 beige hide balsa grain Has OS Max 35 turns 10-5 2-oz prop nut balance flew right off no trim changes has scalelike speed very satisfying project says Larry 0 October 1983 21 GUSTAVE WHITEHEADHERO OR HOAX Thanks recent article Don Berliner American Modeler magazine article William ODwyer 1968 modelers aware Whitehead may have flown 1901 Whitehead affair described some hoax print Ger man immigrant pictured virtual nobody Whitehead nobody respected peers press day found Page newspa pers international magazines articles about Whitehead have appeared through yearsyet virtually no history today mentions him controversial photo has surfaced part presumed van ished photo collection Hoax implies conspiracy Yet 14 witnesses flights found over genera tion research signed affidavits obviously could have consorted Some taped old age Included big-city newspaper editor banker wrote experience 1953 contract between Smithsonian Institution Wright estate compromises Institution relative publication early materials purport question Wrights ing first fly traces back long-ago claims Smithsonian Lang ley flown first No dreamt Whitehead would surface years later ODwyer after Stella Randolph came upon Whitehead artifacts early 30s has spent 20 years $50000 research cru sadehe has six legal-sized cabinets infor mation matched Gustave Whitehead Museum Germany ODwyer has invited Smithsonian examine files German Readers Digest corporate associate American Readers Digest has published book about worlds greatest inventors past 100 years five separate references Whitehead Collec tors will interested block stamps issued German post office bear planform Whitehead machine Whitehead American citizen Since may able read fine print stamps lines bottom read Gus tav Weiskopf 1481901 Karlo Jatho 188 1903 Gebr Wright 17121903 other photos show front back monu ment stands front Whitehead Museum Leutershausen Germany Carl Jatho August 18 1903 flew 581 sq ft biplane 9%-hp engine 59 ft altitude 2% ft Rede signed monoplane 387% sq ft handle wind autumn 1903 attained 196 ft height 11 ft flights did equate Wrights flight certain respects claimed Father Flight Guinness Book Air 7P4 03 ~ an post offices special issue Gustave Whitehead stamps above front back Whitehead monument below Whitehead Museum Leuterhausen Germany Facts Feats specifically lists successful flights still earlier birdmen People getting off groundthat history no mention Whitehead difference between Whiteheads ma chine other early-day contenders except ing Wrights described steerable claimed 1901 flight both sustained steered Whether Whitehead flights ever accepted requiring neutral evaluation bodya respect history requires Whitehead paid due effective anhi-Whitehead written statement out past shows three distinct handwritings signed near future international annual award program will begin under German spon sorshipalong lines Nobel program special awards people high achievement perhaps dozen categories including modeling have already asked yearly nominations five outstanding American modelers Old Gus might aviations Man Iron Mask Bill Winter bad news good news guys using foreign plastic folding props ones tried de cided pathetic Theres break through props least certain kinds mod el will double perhaps triple altitude several excursions pinpoint durationwith spectacular increases rate climb speed length motor run imagine stuff will published soon Back drawing board fellows weather scared off mob just Mad Test Pilot treat ing K&B 60-powered Schlepp POWR young fellow writ ten about some months backlets just call him Brad So made first test hop Jayhawk RTF keep mut tering about Kadet last year two sad OS 35sthe Kadet ended up K&B 40 35s badly beaten varnished works 35 came life smoothed out remarkably after POWR treatment sold Mad Test Pilot little RTF treated engine flew right off proving fast 40 Kadet propped Master Airscrew 9-6 looped rolled inverted wingoveredall first try underestimated ailerons Continued page 24 22 Model Aviation New Specials S795 Look Squadron/Signal Display ALL better Hobby Shops Book Stores favorite Hobby Shop Bookstore does carry Squadron/Signal books send S50 postage & handling Name Address us FREE Squadron/Signal catalog names distributors carry books Squadron/Signal Publication Dept SP2 1115 Crowley Dr Carroilton Tx 75011-5010 set up too much throw Jayhawk almost rolled first correction Max stick movement 1/8 come across things ignore strange aileron installation always cut hole through skin foam lined thin plywood epoxied servo rails front back box Maybe am vamped think RTFs fun would consider aileron trainer Its lively course am Young Brad Midwest Stik also flew LR50 electric-powered Drifter II no gearbut takes off does touch-and-goes has wire skid/strut under forward belly Stik has OS 50 12-oz tank will disappear climbing straight up like spectacular exits published Phil Krafts Stik Grid Leaks early 1960s al ways thought worlds ugliest airplane Some people hate Stiks like some Rubber Scale modelers detest Laceys like Lacey cannot beat Stik flying ability may greatest all-around free-style aerobatics machine ever concocted does things flat wing beyond What things Well hands-off flying young Brad try things Up down field went touch control ex cept turn around although finally would begin vear off its heading Slow flight almost standstill rolls like energetic puppy Brad does intentional flat spins sometimes occur crates aft balance pointand usually cannot recover chap begins regu lar spin slowly feeds opposite aileron Slowly goes flat after pinwheeling perhaps 20 times re laxes control darn thing comes out after five revolutions can blast out rudder control spin slow approach turbulent air keeps pilot busy good air speed can grease in gale must getting old could enjoy building easy flying crate once detested Hang-ups cheat Well top off Mad Test Pilot tore up place Sig Kavalier HP 40 Two years shenanigans unscratched Both crates outer limits joke about re flexes eye perception goes firstlike waiting signals outer space Another strange evening clouds winds odd mix crates some wonderful flying Saturday morning Let see search handle long disserta tion about ailerons RC jobs recent issue seems have accessed everybodys houshold Apple particu larly fine letter Charles W Bentson Continued page 26 24 Model Aviation 6156 Tne Eawrern F-roflf Astounding plastics.. discrir Either Pilotkit.. Sportsman barnstormer.. *Darn Good Airmen.. complete iiflIMAA eSatNYS Residents add 7% Sales tax APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE WHEEIS CONTROLUNEFREE-FLIGHT 000 VINTAGESMOOTHGOLDEN AGENEW sizes2l/CONTOURsIzes21/2BALLOON 3/a3423/i 343 133413/4 1342/z41/2 1144%14 33411/4 43/i31451/4 114511441/211453 1/a6/a2145141/a6 EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL Los Angeles sheds much-needed illumination support statements enclosed copies few pages mysterious book loaded what first glance seemed just erudite mysteries math over whelming diagrams wondered could decipher fine print Strangely books author seemed talking about models much real-plane long-hair stuff obviously knew score gosh reading things didnt know hooked asked Bentson what book pages came fromand chance something published Ill tell about book think masterpiece Ive read over over am still lets pick up some what Bentson say true modelers dont understand effects ailerons low-speed flight Charles began comments washin FF models especially interesting order find some answers took out Martin Si mons Model Aircraft Aerodynamics Argus Books Ltd 14 St James Rd Watford Herts England Editor may obtain book Zenith Avi ation Books PO Box 1/MA Osceola WI 54020 price $2295 item No 16061B big difference way ailerons act depending whether wing straight tapered since tips straight constant chord wing tend fly zero aerodynamic inci dence experience has tapered wings probably needed bit washout didnt have hence trimming ailerons bit up produced effect washout greatly improved low-speed handling Author As said earlier comments slight up-aileron neutral can helpnot Pattern other all-out aerobatics machines typical sport jobs like Kadet has re flexed ailerons per Claude McCulloughs Sig advice have flaps permit ting drag slightly increases angle attack inner wing compared tips gives washed-out tip effect Bentson tement down-aileron does work misleading t Martins book - indicates up-aileron has nearly equal effect down-aileron curves further indicate beyond 1 5-deg range aileron begins act like spoiler may OK up side certainly down side 2 ratio sounds good Author While knowing up-ai leron does some work always assumed work performed down-aileronen visioning down-aileron creating deep camber high CL portion wing up-aileron reflexed camber Perhaps got 26 Model Aviation SCALE RADIO CONTROL SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS JLLLAI5SEND $1 FOR COMPLETE IUUSTRATED CATALOG EROS MA PAWNEE ST SAN MARCOS CA 9 SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013513 738-1576 Catalog Twelve page-Fully Illustrated complete details . MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC carried away Julius Irving flies higher ballerina lends magic Sixers Moses Malone also shakes up enemy troops 2 ratio refers amount up-move ment aileron equate drag down-aileron turn movements equal demands far larger vertical tail overcome down-aileron yaw plane will turn bank ratIer skew around its vertical axis may able use differen tial throws narrow strip ailerons would require ridiculous amount up compensate down-aileron large throws re quired suggests wider ailerons less movement encourage differ ential linkages proof moreup-than-down thing consider Ercoupe early models using 21 aileron differential limited rudder movement Fred Weick de signer sought prevent amateurs overly crossing controls dreaded downwind turns Because virtually old real planes ignored differential lots rud der used along ailerons pilots know about coordination days fliers Giant Scale models insist fly smoothly must coordi nate ailerons rudder use CAR transmitter mode differential being scarce hens teeth early Ercoupe no rudder barit CAR Bentson Alan Slater 85 still active aviation journalist once told about glider pilot 1 920s mistakenly assumed down-aileron did work eliminated opposite upward action went spiral dive overed difficulty go another resulted death Author Charles isnt trying prove something merely relating strange incident stress point dont know circumstances Shallow no dihedral inadequate vertical tail etc establishes down-aileron yaw could controlled tail rudder response poor man doomed such experiment oversized vertical tail would essential would sufficient dihedral powerful rudder could couple aerody namically opposite rolling mo ment three-channel RC picture Eaglet slight washin warp say right tip produces left turn aileron tip warp removed would produce same turn amount down-aile ron corresponded increased lift generated slightly warped tip As tricky standing headon top flagpole Yes agree up-aile ron does almost much work down-aileron Continued page 28 HB ENGINES 21 Grand Prix SCHNEURLE PORTED B C LETS TALK REAL POWER 105 HP @24000 RPM powerful 21 engine H B has produced date flexible engine ever designed. cylinder head can rotated position exhaust stack Rear Left Right GREAT CHOICE FOR FAN JETS Send Si 00 H B Patch Technical Information IIGENES BAVARIAN PRECISION PRODUCTS CO P0 Box 6 Dept E 22 East Avenue canaan connecticut 06840 WHY SETTLE FOR LESS can have Performance/conomy 15x 6 18x 6- 8 10 __________20x 6-8- 10 __ _________22x 81O $1800 Prices include UPS charges D MASTER CHARGE DVISA DCOD DOHECK DMONEY ORDER Dealers / DIstrIbutors Invited ___ DYNATHRUST PROPS INO 2541 NE lith Court Pompano Beach FL 33062 13059419119 Dynathrusts composite construction provides Unequaled Durability Saves money 100% accurate pitch results Outstanding Performance Air Counts October 1983 27 EXHAUST TO THE RIGHT EXHAUST TO THE LEFT s70O $1000 s140O Bring MonoKate classroom right own TV. Top Elites hour MonoKote Video Tape simple flat surfaces fillets hinges Top Elites video tape teaches basic Monokoting skills Learn right own home. per fect club showings too Purchase $3995 rented return within 30 days $2000 refund VHS BETA format available order receives valuable coupon worth up $7560 off list price 12 six foot rolls MonoKote Top Elite. helping step way Send check money order $3995 name full address choice VHS BETA format rOPFUTE MODELS INC TMonoKote Video Tape Otter 1901 N Narragansett Ave Chicago IL 60639 U 213 764-1490 CakQiC qgg IESN 13400-26 Saticoy Streel North Hollywood Calif 91605 UHEAVY DUTYSPECIAL 825I 4-IN SANDERDELUXE SYSTEM F Flit Adjustable table 101 oz HMiter guideU W4Ch letetm $100 101with metal Tx 4 Sand discs1 $300Nicods Chgr 1 3 CASH$2l95$27495 Ship$ 350CASH $15995 PBuI3inkAIR CAPITAL MODELS Ship $ 650 Lifetime SandingReady-ToFlylFB 100 Tools Grit brazedLess Radio EngineU steel Flat type 11/2 xIgSpan radius type 1 x 9 Giant Schoolyard Model Ship Ig 3/4 radius Span 46 049 061$10504061 Engine Both have coarse &engine350sqinchesReg $17995 CASH $139951 fine grits Sf8 peciy. 2-3 CH RadioShip$2500mu Reg $695 Reg $3995$400OR4VIS4 CASH $495 $2597 MORE L Catalog 75 $200 Foreign Add Calif Sales Tax CASH price shown Cards 5% higher 28 Model Aviation Bentson I experience drastically retrimming ailerons fullscale glider 1935 Rhonbuzzard restored ailerons modified half original length well-known sailplane designer However British Gliding Association test panel would test approve because origi nal aileron travel available permit fly set about find safe solution experience large RC models indicated aile ron differentials about 3 actually im proved aileron response look Schleicher K-l 8 best ailerons fleet simi lar differential retrimmed Rhonbuzzard originally-specified up ward deflection considerably red duced down travelabout 2 1 honor testing machine nearly age flown 12 years delight fly much responsive vintage gliders fitted 100-in Monterey Sail plane trailing edge ailerons along inner two-thirds wing panel Movement limited upward Aileron control crisp fast rate roll strongly recommend arrangement Author I just learned something seem have new toy Bentson I used different approach 11-ft RC Sailplane bought dirt-cheap because handled badly roll Author Charles somethingthe guy ever buy model because flew poorly conventional ailerons readjusted give some good differential rigging rest position five degrees up good handling restored able dispense over sized rudder fit much smaller rudder correct spiral sta bility Author rye just read times Unless requirements neutrally-stable alrplane probably symmetrical section Bentson just said mouthful As hacker think per ceive getting roll control out up-aileron has some down remaining net re sult has achieved differential using traditional methodsyes course could get rid oversized vertical tail have smoother-flying machine Reading book sent think means has less center-of-pressure travel much stable machine about axes earlier stall point though good fliers dont get near stall what paid get good things achieved probably immateri al learn less know did come out Chi nese fortune cookie Bentson You mentioned prob Continued page 128 r N WIN session 4-leA SPORT WINCH LightweIght 34 lbs 155kg battery Surprising performance r develops g HP Reliable & durable ity components Easy use stable electrodynamic brake help prevent backlashe Complete around parachute 600 meters go lb braided nylon line $21500 battery shipping charges included also sell finest 160 lb braided nylon contest towline $lg201600 meters plus shipping Send complete descriptive literature price list 68 Morgan Ave Danbury CT 06810 TEL203 743-3312 FASTEN YOUR SEA TBELTS! .ATTYOU CROSS THE THRESHOLD TO THE BLUE ANGELS EX PERIENCE YOU CAN NOW THRILL TO THE REAL LIFE ADVENTURE WITH SIX DARING MEN AND THEIR FLYING MACHINES SIT IN FRONT ROW COCKPIT AND SENSE THE EMOTIONS AND EXTREME CONCEN TRATION AS YOUR DOUGLAS F-4J PHANTOM GOES THROUGH ITS PACES WITH 32000 POUNDS OF THRUST TO TOP SPEED OF 1600 MPH! FULL COLOR VIDEO WITH NAR RATION AND ACTUAL SOUNDS MUSIC BY FRED MYROW 1/2 VHS D V2 Beta 1 El 1/2 Beta2 El 46 mm VIDEO $6500 K 89 min$8500 El Shipping $250 ea lilust Info Pkg $200 El refundable purchase VISA El MASTERCHARGE El Number_________ date_______ N moo _________StateZip AUDIO VISUALS INTERNATIONAL PO BOX 1390 WOODLAND WASHINGTON 98674 Nick Zirolis F4U CORSAIR 2 Cu size Engines Fibergiass Fuse age & Cowlieg aua able fur lee O5SiQC GIANT RIC SCALE PLAN DESIGNS AT6 TEXAN24 I101Span52700ppUSA POKKER DR27163Tripe$2000ppUSA PAP REARCAT2 186Span$2700ppUSA CURTISS P402 194Span$2700ppUSA FAU CORSAIR2Y 193Span$2700ppUSA Fiberglass Cowliegs & Canopies available ase Send sramp aelaileg urusnures Giaer Scale Accessurius Oar Fans seer Fusfpaid arilbin UgAl last item leave also con cerns Sailpianes sort came form short note photograph Dale Willoughby will know has vast collection documentation photographs Scale modelers available Scale Model Research Orange CA As can seen accompanying photograph subject Dales story electric-powered Sailplane-like model being launched recent US/International F3E Challenge com petition photo taken moment wind gust caused model twist launcher Dale Blacks hand Dale member Harbor Soaring Society long-time RC Sailplane Ilier momentarily forgot model whirling prop its nose quick grab straighten twisting model resulted some nasty cuts left hand Moral Dont grab business end F3E Have safe month John Preston 7012 Elvira Cr Falls Church VA 22042 Fun/Winter Continued page 28 lems inadequately-sized vertical tail area old designs Author case full-scale old-timers am great believer sticking orig inal scale size compensating providing thicker effective sec tion Most modelers completely ignore aerodynamics come tail cut out sheet material cause comparatively small size tail surfaces models need especial attention section used sug gestion square trailing edge good Author talking model aile rons flutterpointed control sur face edges probablyand Joe Bridis constant-thickness ailerons trainers Author I half-buy However smaller model tougher stick scale tail areas time get 1/5-scale larger ability hold hold scale size penal ty becomes increasingly greater de part scale airfoils resort freely flat-bottomed ones Especially thick have serious CP travel increasing angles attack thus require larger tail area symmetrical semi-symmetri cal some other scale section used first case because mon keying around might need 30% stab latter less 20% 15% less ship least 4/2 5 ft span long fuselage arm 10% would feasible some cases talk full-scale powerplane experience glider experience scanty have noted RC models sectioned stabs streamlined double-triangles end-to-end ribs fly better sheet-tailed crates dont have foggiest reason respected pilots say true Bentson Perhaps best argument upward-rigged ailerons comes modern sailplanes camber-changing flaps ailerons arranged move up down flaps Although would preferable take off aerotow flaps slightly down common practice take off least initiate takeoff run flaps up cause better aileron control obtained less likelihood wing tip touching ground case aile ron drag factor because tow attachment nose Humor guys because game plan column has gone up smoke Old-timer modelers Indoors Sailplanes FF Power etc have dozens years hands-on experience better Rubber Scalersand Wakefielders Nordic guys think Tweakers Breathers fine tuning crates seems stream consciousness us books articles aerodynamics appear written folks weve never met greater man able communicate matters far beyond us simple understandable wayand truths revealed witnessed TV worlds greatest musicians con duct Masters Classescelloist Casals exampleyou mesmerized ability true geniuses touch gestures simple words humblest student dare say Ein stein field Dr Lippisch could convey over coffee glimpse im ponderables unattainable lifetime reading Having nothing prove great teachers dont blow us away avalanches math gobbledygook contrived impress peers close loopholes criticism other elitists talking During early 1930s once sat up night reading small book aero dynamics explained airplane flew basics stability factors propeller design designer went about buildingblock process based rudimentary things probably way people like Bellanca Fokker etc wrought magic simple book seemed like Christmas Future So humble author George Page greatest designers age man produced miracles Curtiss years before war Youll never see book like again alas read About Size January 1978 Model Aviation Brad Powers experienced vision basic relationships Powers long re tired few readers knew renowned project engineer Convair participated long string re markable aircraft Somewhat like Page compressed universe rare 128 Model Aviation briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft
Edition: Model Aviation - 1983/10
Page Numbers: 20, 21, 22, 24, 26, 27, 28, 128, 129
FRIDAY MORNINGS lot better Mondays especially after exhil arating evenings flying modified 2/2l Leisure LR5O-powered model cabin configuration make com parisons Parasols have minor draw back especially use high pretty tail can understand consider Pattern jobs have high forward profile assist knife-edge flight put parasol banked turn go hands-off tends tighten turn un corrected begins go spiral dive requires opposite rudder twoand three-channel jobs sup posed have FF-like good gliding abili ty cabin configuration case reduces need use rudder stay hands-off once trimmed circle lift found old FF tricksthat 1fting airfoiled stab well aft CG nice things Climb does appear steep crate just seeming rise until attains high altitudes thought knew about lifting tails Oh yeah honest 9-1 0-mmminimum crate lifeless evening warm-air evenings sunny dura tion 13 mm thermals CG come out parasol 35% chord obviously too far forward big airfoiled stab anybody would settle excellent performance Climb-out analogous Cub Champ both have best rate climb 65 hp 60 mph light planes reduced power youd have retrim higher airspeed best-climb rate new power setting Electric does same thing goes power plateau gradually remove slight up-trim Since crate handles like light plane chop power Jomar propor tional throttle Joe Utasi naturally up-trim required best glide Ele vators gentle Glide duration 45% power run time takes get max altitude Now having moved 250 rnAh re ceiver pack back 1 perfect CG lifting tail 40% 1-deg angular difference first tried 1/16 shim under wing LE increase difference High up crate appeared float slow ly power off duration off 30 sec less sink probably better L/D ratio used full-up for20 Model Aviation U jUSt fun Bill Winter Left Charles Bentson featured column flew fin-mounted Cox 02-powered 54-in-span glider International Veteran Glider Meet fun along Martin Simonswhose book Bill Winter talks about meet storied Wasserkuppe gliding began flourish after 1914-iS war cloudy gusty misty rain late day Simons talked Bentson down after 20 minutes Bentsons fogged glasses forced him go instruments Right Bentsons lovely flying wing glider Use reflexed NACA 23012 eirfpil gives stability spite rectangular no-sweep wing text Bentson adds discussion effects ailerons Please meet old friend Bill Winters New Zealand Bill Mackley 50-year-plus self-designed Free Flight two met Kingston Ont Canada Mackley instruct ing RAF pilots 1-larvards after bomber tour over Europe Mackley now retired after lifetime civil aviation visits Washington DC behalf Flight Safety Foundation model refurbished bright red blue yellow Solarfilm since original bamboo paper wss tatters Baby Cyclone engine still usable tank spark coil missing Winter published picture plane September 1942 issue Air Trails magazine Mackley now installing RC electric power Time marches ward CG although CG moved back crate almost entirely handsofftakeoffs 15-20 ft needing no controls will drop prop pitch 7 7 li-in diameter hopefully faster climb less current consump tion longer runs shut off 5 max 6 mm order have power dragging approaches possible gorounds want keep realistic light-plane piloting technique man thats fun favor trim power l0und tfle ratters oy lius MunIcn tnis Geodetic Galaxie 300 FF 20 years ago Mills 045 diesel Its now converted Leisure LT5O electric power six motor cells Cannon micros elevator rudder weighs 31 oz props 9-7 Torna gets li-mm flights 10-mm motor battery charge Joy fly gentle forgiving great glide says Gus reports Elec tric flying proliferating Long Island Playboys Winters recent tip East Islipchange Westl Winter says really didnt design oncepopular FF previous Air Trails magazine article averaged dimensions areas etc numerous FFs Americas greatest fliers American averagewith precise area used Denny Davis sensa tional Class Hogan Sal Taibi recalls being beaten Indianapolis Junior beginner took first Old-timers will interested full-size detailed plan Class AB version being sold $350 pIus 65 cents postage SAMs Bob Larsh 45 South Whitcomb Ave Indianapolis IN 46241 Arden 19-size three-view based Winter opines vertical tail looks too big now Anyway stood threepoint ROGing single wheel some up-trim -for power off Al though Don Srulls magnificent Electric Sparky flies greater authority spectacular much sur prised find four flights both ships alternating came up four identical flight times Yesterdays flying proved 7-in pitch gets altitude 7-in pitch too much just barely both cases / - 7 4LL AMER/CAN Designed BILL WINTER WINGSPAN 54 WING AREA384 SQ STA6ILlZER 385% MOMENT ARM 39% POWERARDEN 199 L L L L L WF7II-----I-- I I I II NOTE MODEL FEATURED IMPLE 1/8 KEEL FUSELAGE WITH I/B BOTTOM FROM AIR TRAILS CIRCA 1948/49 liii LF C --7 --7 L 1 L L L LLL- ES 0 2 3 4 5 6 7 8 10 1214 16hid Balsa USA Taube modified Larry Hill Pine Barons MAC New Jersey has nice Stand-Off Scale look scalloped trail ing edges surfaces added ailerons covered fuselage back TE 1/64 plywood adding glue rivets painted ply silver Dummied six-cylinder water-cooled engine radiators added top bottom kingposts flying wires wing tail Antique Coy erite Fuselage fin rudder sprayed Krylon 2504 beige hide balsa grain Has OS Max 35 turns 10-5 2-oz prop nut balance flew right off no trim changes has scalelike speed very satisfying project says Larry 0 October 1983 21 GUSTAVE WHITEHEADHERO OR HOAX Thanks recent article Don Berliner American Modeler magazine article William ODwyer 1968 modelers aware Whitehead may have flown 1901 Whitehead affair described some hoax print Ger man immigrant pictured virtual nobody Whitehead nobody respected peers press day found Page newspa pers international magazines articles about Whitehead have appeared through yearsyet virtually no history today mentions him controversial photo has surfaced part presumed van ished photo collection Hoax implies conspiracy Yet 14 witnesses flights found over genera tion research signed affidavits obviously could have consorted Some taped old age Included big-city newspaper editor banker wrote experience 1953 contract between Smithsonian Institution Wright estate compromises Institution relative publication early materials purport question Wrights ing first fly traces back long-ago claims Smithsonian Lang ley flown first No dreamt Whitehead would surface years later ODwyer after Stella Randolph came upon Whitehead artifacts early 30s has spent 20 years $50000 research cru sadehe has six legal-sized cabinets infor mation matched Gustave Whitehead Museum Germany ODwyer has invited Smithsonian examine files German Readers Digest corporate associate American Readers Digest has published book about worlds greatest inventors past 100 years five separate references Whitehead Collec tors will interested block stamps issued German post office bear planform Whitehead machine Whitehead American citizen Since may able read fine print stamps lines bottom read Gus tav Weiskopf 1481901 Karlo Jatho 188 1903 Gebr Wright 17121903 other photos show front back monu ment stands front Whitehead Museum Leutershausen Germany Carl Jatho August 18 1903 flew 581 sq ft biplane 9%-hp engine 59 ft altitude 2% ft Rede signed monoplane 387% sq ft handle wind autumn 1903 attained 196 ft height 11 ft flights did equate Wrights flight certain respects claimed Father Flight Guinness Book Air 7P4 03 ~ an post offices special issue Gustave Whitehead stamps above front back Whitehead monument below Whitehead Museum Leuterhausen Germany Facts Feats specifically lists successful flights still earlier birdmen People getting off groundthat history no mention Whitehead difference between Whiteheads ma chine other early-day contenders except ing Wrights described steerable claimed 1901 flight both sustained steered Whether Whitehead flights ever accepted requiring neutral evaluation bodya respect history requires Whitehead paid due effective anhi-Whitehead written statement out past shows three distinct handwritings signed near future international annual award program will begin under German spon sorshipalong lines Nobel program special awards people high achievement perhaps dozen categories including modeling have already asked yearly nominations five outstanding American modelers Old Gus might aviations Man Iron Mask Bill Winter bad news good news guys using foreign plastic folding props ones tried de cided pathetic Theres break through props least certain kinds mod el will double perhaps triple altitude several excursions pinpoint durationwith spectacular increases rate climb speed length motor run imagine stuff will published soon Back drawing board fellows weather scared off mob just Mad Test Pilot treat ing K&B 60-powered Schlepp POWR young fellow writ ten about some months backlets just call him Brad So made first test hop Jayhawk RTF keep mut tering about Kadet last year two sad OS 35sthe Kadet ended up K&B 40 35s badly beaten varnished works 35 came life smoothed out remarkably after POWR treatment sold Mad Test Pilot little RTF treated engine flew right off proving fast 40 Kadet propped Master Airscrew 9-6 looped rolled inverted wingoveredall first try underestimated ailerons Continued page 24 22 Model Aviation New Specials S795 Look Squadron/Signal Display ALL better Hobby Shops Book Stores favorite Hobby Shop Bookstore does carry Squadron/Signal books send S50 postage & handling Name Address us FREE Squadron/Signal catalog names distributors carry books Squadron/Signal Publication Dept SP2 1115 Crowley Dr Carroilton Tx 75011-5010 set up too much throw Jayhawk almost rolled first correction Max stick movement 1/8 come across things ignore strange aileron installation always cut hole through skin foam lined thin plywood epoxied servo rails front back box Maybe am vamped think RTFs fun would consider aileron trainer Its lively course am Young Brad Midwest Stik also flew LR50 electric-powered Drifter II no gearbut takes off does touch-and-goes has wire skid/strut under forward belly Stik has OS 50 12-oz tank will disappear climbing straight up like spectacular exits published Phil Krafts Stik Grid Leaks early 1960s al ways thought worlds ugliest airplane Some people hate Stiks like some Rubber Scale modelers detest Laceys like Lacey cannot beat Stik flying ability may greatest all-around free-style aerobatics machine ever concocted does things flat wing beyond What things Well hands-off flying young Brad try things Up down field went touch control ex cept turn around although finally would begin vear off its heading Slow flight almost standstill rolls like energetic puppy Brad does intentional flat spins sometimes occur crates aft balance pointand usually cannot recover chap begins regu lar spin slowly feeds opposite aileron Slowly goes flat after pinwheeling perhaps 20 times re laxes control darn thing comes out after five revolutions can blast out rudder control spin slow approach turbulent air keeps pilot busy good air speed can grease in gale must getting old could enjoy building easy flying crate once detested Hang-ups cheat Well top off Mad Test Pilot tore up place Sig Kavalier HP 40 Two years shenanigans unscratched Both crates outer limits joke about re flexes eye perception goes firstlike waiting signals outer space Another strange evening clouds winds odd mix crates some wonderful flying Saturday morning Let see search handle long disserta tion about ailerons RC jobs recent issue seems have accessed everybodys houshold Apple particu larly fine letter Charles W Bentson Continued page 26 24 Model Aviation 6156 Tne Eawrern F-roflf Astounding plastics.. discrir Either Pilotkit.. Sportsman barnstormer.. *Darn Good Airmen.. complete iiflIMAA eSatNYS Residents add 7% Sales tax APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE WHEEIS CONTROLUNEFREE-FLIGHT 000 VINTAGESMOOTHGOLDEN AGENEW sizes2l/CONTOURsIzes21/2BALLOON 3/a3423/i 343 133413/4 1342/z41/2 1144%14 33411/4 43/i31451/4 114511441/211453 1/a6/a2145141/a6 EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL Los Angeles sheds much-needed illumination support statements enclosed copies few pages mysterious book loaded what first glance seemed just erudite mysteries math over whelming diagrams wondered could decipher fine print Strangely books author seemed talking about models much real-plane long-hair stuff obviously knew score gosh reading things didnt know hooked asked Bentson what book pages came fromand chance something published Ill tell about book think masterpiece Ive read over over am still lets pick up some what Bentson say true modelers dont understand effects ailerons low-speed flight Charles began comments washin FF models especially interesting order find some answers took out Martin Si mons Model Aircraft Aerodynamics Argus Books Ltd 14 St James Rd Watford Herts England Editor may obtain book Zenith Avi ation Books PO Box 1/MA Osceola WI 54020 price $2295 item No 16061B big difference way ailerons act depending whether wing straight tapered since tips straight constant chord wing tend fly zero aerodynamic inci dence experience has tapered wings probably needed bit washout didnt have hence trimming ailerons bit up produced effect washout greatly improved low-speed handling Author As said earlier comments slight up-aileron neutral can helpnot Pattern other all-out aerobatics machines typical sport jobs like Kadet has re flexed ailerons per Claude McCulloughs Sig advice have flaps permit ting drag slightly increases angle attack inner wing compared tips gives washed-out tip effect Bentson tement down-aileron does work misleading t Martins book - indicates up-aileron has nearly equal effect down-aileron curves further indicate beyond 1 5-deg range aileron begins act like spoiler may OK up side certainly down side 2 ratio sounds good Author While knowing up-ai leron does some work always assumed work performed down-aileronen visioning down-aileron creating deep camber high CL portion wing up-aileron reflexed camber Perhaps got 26 Model Aviation SCALE RADIO CONTROL SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS JLLLAI5SEND $1 FOR COMPLETE IUUSTRATED CATALOG EROS MA PAWNEE ST SAN MARCOS CA 9 SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013513 738-1576 Catalog Twelve page-Fully Illustrated complete details . MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC carried away Julius Irving flies higher ballerina lends magic Sixers Moses Malone also shakes up enemy troops 2 ratio refers amount up-move ment aileron equate drag down-aileron turn movements equal demands far larger vertical tail overcome down-aileron yaw plane will turn bank ratIer skew around its vertical axis may able use differen tial throws narrow strip ailerons would require ridiculous amount up compensate down-aileron large throws re quired suggests wider ailerons less movement encourage differ ential linkages proof moreup-than-down thing consider Ercoupe early models using 21 aileron differential limited rudder movement Fred Weick de signer sought prevent amateurs overly crossing controls dreaded downwind turns Because virtually old real planes ignored differential lots rud der used along ailerons pilots know about coordination days fliers Giant Scale models insist fly smoothly must coordi nate ailerons rudder use CAR transmitter mode differential being scarce hens teeth early Ercoupe no rudder barit CAR Bentson Alan Slater 85 still active aviation journalist once told about glider pilot 1 920s mistakenly assumed down-aileron did work eliminated opposite upward action went spiral dive overed difficulty go another resulted death Author Charles isnt trying prove something merely relating strange incident stress point dont know circumstances Shallow no dihedral inadequate vertical tail etc establishes down-aileron yaw could controlled tail rudder response poor man doomed such experiment oversized vertical tail would essential would sufficient dihedral powerful rudder could couple aerody namically opposite rolling mo ment three-channel RC picture Eaglet slight washin warp say right tip produces left turn aileron tip warp removed would produce same turn amount down-aile ron corresponded increased lift generated slightly warped tip As tricky standing headon top flagpole Yes agree up-aile ron does almost much work down-aileron Continued page 28 HB ENGINES 21 Grand Prix SCHNEURLE PORTED B C LETS TALK REAL POWER 105 HP @24000 RPM powerful 21 engine H B has produced date flexible engine ever designed. cylinder head can rotated position exhaust stack Rear Left Right GREAT CHOICE FOR FAN JETS Send Si 00 H B Patch Technical Information IIGENES BAVARIAN PRECISION PRODUCTS CO P0 Box 6 Dept E 22 East Avenue canaan connecticut 06840 WHY SETTLE FOR LESS can have Performance/conomy 15x 6 18x 6- 8 10 __________20x 6-8- 10 __ _________22x 81O $1800 Prices include UPS charges D MASTER CHARGE DVISA DCOD DOHECK DMONEY ORDER Dealers / DIstrIbutors Invited ___ DYNATHRUST PROPS INO 2541 NE lith Court Pompano Beach FL 33062 13059419119 Dynathrusts composite construction provides Unequaled Durability Saves money 100% accurate pitch results Outstanding Performance Air Counts October 1983 27 EXHAUST TO THE RIGHT EXHAUST TO THE LEFT s70O $1000 s140O Bring MonoKate classroom right own TV. Top Elites hour MonoKote Video Tape simple flat surfaces fillets hinges Top Elites video tape teaches basic Monokoting skills Learn right own home. per fect club showings too Purchase $3995 rented return within 30 days $2000 refund VHS BETA format available order receives valuable coupon worth up $7560 off list price 12 six foot rolls MonoKote Top Elite. helping step way Send check money order $3995 name full address choice VHS BETA format rOPFUTE MODELS INC TMonoKote Video Tape Otter 1901 N Narragansett Ave Chicago IL 60639 U 213 764-1490 CakQiC qgg IESN 13400-26 Saticoy Streel North Hollywood Calif 91605 UHEAVY DUTYSPECIAL 825I 4-IN SANDERDELUXE SYSTEM F Flit Adjustable table 101 oz HMiter guideU W4Ch letetm $100 101with metal Tx 4 Sand discs1 $300Nicods Chgr 1 3 CASH$2l95$27495 Ship$ 350CASH $15995 PBuI3inkAIR CAPITAL MODELS Ship $ 650 Lifetime SandingReady-ToFlylFB 100 Tools Grit brazedLess Radio EngineU steel Flat type 11/2 xIgSpan radius type 1 x 9 Giant Schoolyard Model Ship Ig 3/4 radius Span 46 049 061$10504061 Engine Both have coarse &engine350sqinchesReg $17995 CASH $139951 fine grits Sf8 peciy. 2-3 CH RadioShip$2500mu Reg $695 Reg $3995$400OR4VIS4 CASH $495 $2597 MORE L Catalog 75 $200 Foreign Add Calif Sales Tax CASH price shown Cards 5% higher 28 Model Aviation Bentson I experience drastically retrimming ailerons fullscale glider 1935 Rhonbuzzard restored ailerons modified half original length well-known sailplane designer However British Gliding Association test panel would test approve because origi nal aileron travel available permit fly set about find safe solution experience large RC models indicated aile ron differentials about 3 actually im proved aileron response look Schleicher K-l 8 best ailerons fleet simi lar differential retrimmed Rhonbuzzard originally-specified up ward deflection considerably red duced down travelabout 2 1 honor testing machine nearly age flown 12 years delight fly much responsive vintage gliders fitted 100-in Monterey Sail plane trailing edge ailerons along inner two-thirds wing panel Movement limited upward Aileron control crisp fast rate roll strongly recommend arrangement Author I just learned something seem have new toy Bentson I used different approach 11-ft RC Sailplane bought dirt-cheap because handled badly roll Author Charles somethingthe guy ever buy model because flew poorly conventional ailerons readjusted give some good differential rigging rest position five degrees up good handling restored able dispense over sized rudder fit much smaller rudder correct spiral sta bility Author rye just read times Unless requirements neutrally-stable alrplane probably symmetrical section Bentson just said mouthful As hacker think per ceive getting roll control out up-aileron has some down remaining net re sult has achieved differential using traditional methodsyes course could get rid oversized vertical tail have smoother-flying machine Reading book sent think means has less center-of-pressure travel much stable machine about axes earlier stall point though good fliers dont get near stall what paid get good things achieved probably immateri al learn less know did come out Chi nese fortune cookie Bentson You mentioned prob Continued page 128 r N WIN session 4-leA SPORT WINCH LightweIght 34 lbs 155kg battery Surprising performance r develops g HP Reliable & durable ity components Easy use stable electrodynamic brake help prevent backlashe Complete around parachute 600 meters go lb braided nylon line $21500 battery shipping charges included also sell finest 160 lb braided nylon contest towline $lg201600 meters plus shipping Send complete descriptive literature price list 68 Morgan Ave Danbury CT 06810 TEL203 743-3312 FASTEN YOUR SEA TBELTS! .ATTYOU CROSS THE THRESHOLD TO THE BLUE ANGELS EX PERIENCE YOU CAN NOW THRILL TO THE REAL LIFE ADVENTURE WITH SIX DARING MEN AND THEIR FLYING MACHINES SIT IN FRONT ROW COCKPIT AND SENSE THE EMOTIONS AND EXTREME CONCEN TRATION AS YOUR DOUGLAS F-4J PHANTOM GOES THROUGH ITS PACES WITH 32000 POUNDS OF THRUST TO TOP SPEED OF 1600 MPH! FULL COLOR VIDEO WITH NAR RATION AND ACTUAL SOUNDS MUSIC BY FRED MYROW 1/2 VHS D V2 Beta 1 El 1/2 Beta2 El 46 mm VIDEO $6500 K 89 min$8500 El Shipping $250 ea lilust Info Pkg $200 El refundable purchase VISA El MASTERCHARGE El Number_________ date_______ N moo _________StateZip AUDIO VISUALS INTERNATIONAL PO BOX 1390 WOODLAND WASHINGTON 98674 Nick Zirolis F4U CORSAIR 2 Cu size Engines Fibergiass Fuse age & Cowlieg aua able fur lee O5SiQC GIANT RIC SCALE PLAN DESIGNS AT6 TEXAN24 I101Span52700ppUSA POKKER DR27163Tripe$2000ppUSA PAP REARCAT2 186Span$2700ppUSA CURTISS P402 194Span$2700ppUSA FAU CORSAIR2Y 193Span$2700ppUSA Fiberglass Cowliegs & Canopies available ase Send sramp aelaileg urusnures Giaer Scale Accessurius Oar Fans seer Fusfpaid arilbin UgAl last item leave also con cerns Sailpianes sort came form short note photograph Dale Willoughby will know has vast collection documentation photographs Scale modelers available Scale Model Research Orange CA As can seen accompanying photograph subject Dales story electric-powered Sailplane-like model being launched recent US/International F3E Challenge com petition photo taken moment wind gust caused model twist launcher Dale Blacks hand Dale member Harbor Soaring Society long-time RC Sailplane Ilier momentarily forgot model whirling prop its nose quick grab straighten twisting model resulted some nasty cuts left hand Moral Dont grab business end F3E Have safe month John Preston 7012 Elvira Cr Falls Church VA 22042 Fun/Winter Continued page 28 lems inadequately-sized vertical tail area old designs Author case full-scale old-timers am great believer sticking orig inal scale size compensating providing thicker effective sec tion Most modelers completely ignore aerodynamics come tail cut out sheet material cause comparatively small size tail surfaces models need especial attention section used sug gestion square trailing edge good Author talking model aile rons flutterpointed control sur face edges probablyand Joe Bridis constant-thickness ailerons trainers Author I half-buy However smaller model tougher stick scale tail areas time get 1/5-scale larger ability hold hold scale size penal ty becomes increasingly greater de part scale airfoils resort freely flat-bottomed ones Especially thick have serious CP travel increasing angles attack thus require larger tail area symmetrical semi-symmetri cal some other scale section used first case because mon keying around might need 30% stab latter less 20% 15% less ship least 4/2 5 ft span long fuselage arm 10% would feasible some cases talk full-scale powerplane experience glider experience scanty have noted RC models sectioned stabs streamlined double-triangles end-to-end ribs fly better sheet-tailed crates dont have foggiest reason respected pilots say true Bentson Perhaps best argument upward-rigged ailerons comes modern sailplanes camber-changing flaps ailerons arranged move up down flaps Although would preferable take off aerotow flaps slightly down common practice take off least initiate takeoff run flaps up cause better aileron control obtained less likelihood wing tip touching ground case aile ron drag factor because tow attachment nose Humor guys because game plan column has gone up smoke Old-timer modelers Indoors Sailplanes FF Power etc have dozens years hands-on experience better Rubber Scalersand Wakefielders Nordic guys think Tweakers Breathers fine tuning crates seems stream consciousness us books articles aerodynamics appear written folks weve never met greater man able communicate matters far beyond us simple understandable wayand truths revealed witnessed TV worlds greatest musicians con duct Masters Classescelloist Casals exampleyou mesmerized ability true geniuses touch gestures simple words humblest student dare say Ein stein field Dr Lippisch could convey over coffee glimpse im ponderables unattainable lifetime reading Having nothing prove great teachers dont blow us away avalanches math gobbledygook contrived impress peers close loopholes criticism other elitists talking During early 1930s once sat up night reading small book aero dynamics explained airplane flew basics stability factors propeller design designer went about buildingblock process based rudimentary things probably way people like Bellanca Fokker etc wrought magic simple book seemed like Christmas Future So humble author George Page greatest designers age man produced miracles Curtiss years before war Youll never see book like again alas read About Size January 1978 Model Aviation Brad Powers experienced vision basic relationships Powers long re tired few readers knew renowned project engineer Convair participated long string re markable aircraft Somewhat like Page compressed universe rare 128 Model Aviation briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft
Edition: Model Aviation - 1983/10
Page Numbers: 20, 21, 22, 24, 26, 27, 28, 128, 129
FRIDAY MORNINGS lot better Mondays especially after exhil arating evenings flying modified 2/2l Leisure LR5O-powered model cabin configuration make com parisons Parasols have minor draw back especially use high pretty tail can understand consider Pattern jobs have high forward profile assist knife-edge flight put parasol banked turn go hands-off tends tighten turn un corrected begins go spiral dive requires opposite rudder twoand three-channel jobs sup posed have FF-like good gliding abili ty cabin configuration case reduces need use rudder stay hands-off once trimmed circle lift found old FF tricksthat 1fting airfoiled stab well aft CG nice things Climb does appear steep crate just seeming rise until attains high altitudes thought knew about lifting tails Oh yeah honest 9-1 0-mmminimum crate lifeless evening warm-air evenings sunny dura tion 13 mm thermals CG come out parasol 35% chord obviously too far forward big airfoiled stab anybody would settle excellent performance Climb-out analogous Cub Champ both have best rate climb 65 hp 60 mph light planes reduced power youd have retrim higher airspeed best-climb rate new power setting Electric does same thing goes power plateau gradually remove slight up-trim Since crate handles like light plane chop power Jomar propor tional throttle Joe Utasi naturally up-trim required best glide Ele vators gentle Glide duration 45% power run time takes get max altitude Now having moved 250 rnAh re ceiver pack back 1 perfect CG lifting tail 40% 1-deg angular difference first tried 1/16 shim under wing LE increase difference High up crate appeared float slow ly power off duration off 30 sec less sink probably better L/D ratio used full-up for20 Model Aviation U jUSt fun Bill Winter Left Charles Bentson featured column flew fin-mounted Cox 02-powered 54-in-span glider International Veteran Glider Meet fun along Martin Simonswhose book Bill Winter talks about meet storied Wasserkuppe gliding began flourish after 1914-iS war cloudy gusty misty rain late day Simons talked Bentson down after 20 minutes Bentsons fogged glasses forced him go instruments Right Bentsons lovely flying wing glider Use reflexed NACA 23012 eirfpil gives stability spite rectangular no-sweep wing text Bentson adds discussion effects ailerons Please meet old friend Bill Winters New Zealand Bill Mackley 50-year-plus self-designed Free Flight two met Kingston Ont Canada Mackley instruct ing RAF pilots 1-larvards after bomber tour over Europe Mackley now retired after lifetime civil aviation visits Washington DC behalf Flight Safety Foundation model refurbished bright red blue yellow Solarfilm since original bamboo paper wss tatters Baby Cyclone engine still usable tank spark coil missing Winter published picture plane September 1942 issue Air Trails magazine Mackley now installing RC electric power Time marches ward CG although CG moved back crate almost entirely handsofftakeoffs 15-20 ft needing no controls will drop prop pitch 7 7 li-in diameter hopefully faster climb less current consump tion longer runs shut off 5 max 6 mm order have power dragging approaches possible gorounds want keep realistic light-plane piloting technique man thats fun favor trim power l0und tfle ratters oy lius MunIcn tnis Geodetic Galaxie 300 FF 20 years ago Mills 045 diesel Its now converted Leisure LT5O electric power six motor cells Cannon micros elevator rudder weighs 31 oz props 9-7 Torna gets li-mm flights 10-mm motor battery charge Joy fly gentle forgiving great glide says Gus reports Elec tric flying proliferating Long Island Playboys Winters recent tip East Islipchange Westl Winter says really didnt design oncepopular FF previous Air Trails magazine article averaged dimensions areas etc numerous FFs Americas greatest fliers American averagewith precise area used Denny Davis sensa tional Class Hogan Sal Taibi recalls being beaten Indianapolis Junior beginner took first Old-timers will interested full-size detailed plan Class AB version being sold $350 pIus 65 cents postage SAMs Bob Larsh 45 South Whitcomb Ave Indianapolis IN 46241 Arden 19-size three-view based Winter opines vertical tail looks too big now Anyway stood threepoint ROGing single wheel some up-trim -for power off Al though Don Srulls magnificent Electric Sparky flies greater authority spectacular much sur prised find four flights both ships alternating came up four identical flight times Yesterdays flying proved 7-in pitch gets altitude 7-in pitch too much just barely both cases / - 7 4LL AMER/CAN Designed BILL WINTER WINGSPAN 54 WING AREA384 SQ STA6ILlZER 385% MOMENT ARM 39% POWERARDEN 199 L L L L L WF7II-----I-- I I I II NOTE MODEL FEATURED IMPLE 1/8 KEEL FUSELAGE WITH I/B BOTTOM FROM AIR TRAILS CIRCA 1948/49 liii LF C --7 --7 L 1 L L L LLL- ES 0 2 3 4 5 6 7 8 10 1214 16hid Balsa USA Taube modified Larry Hill Pine Barons MAC New Jersey has nice Stand-Off Scale look scalloped trail ing edges surfaces added ailerons covered fuselage back TE 1/64 plywood adding glue rivets painted ply silver Dummied six-cylinder water-cooled engine radiators added top bottom kingposts flying wires wing tail Antique Coy erite Fuselage fin rudder sprayed Krylon 2504 beige hide balsa grain Has OS Max 35 turns 10-5 2-oz prop nut balance flew right off no trim changes has scalelike speed very satisfying project says Larry 0 October 1983 21 GUSTAVE WHITEHEADHERO OR HOAX Thanks recent article Don Berliner American Modeler magazine article William ODwyer 1968 modelers aware Whitehead may have flown 1901 Whitehead affair described some hoax print Ger man immigrant pictured virtual nobody Whitehead nobody respected peers press day found Page newspa pers international magazines articles about Whitehead have appeared through yearsyet virtually no history today mentions him controversial photo has surfaced part presumed van ished photo collection Hoax implies conspiracy Yet 14 witnesses flights found over genera tion research signed affidavits obviously could have consorted Some taped old age Included big-city newspaper editor banker wrote experience 1953 contract between Smithsonian Institution Wright estate compromises Institution relative publication early materials purport question Wrights ing first fly traces back long-ago claims Smithsonian Lang ley flown first No dreamt Whitehead would surface years later ODwyer after Stella Randolph came upon Whitehead artifacts early 30s has spent 20 years $50000 research cru sadehe has six legal-sized cabinets infor mation matched Gustave Whitehead Museum Germany ODwyer has invited Smithsonian examine files German Readers Digest corporate associate American Readers Digest has published book about worlds greatest inventors past 100 years five separate references Whitehead Collec tors will interested block stamps issued German post office bear planform Whitehead machine Whitehead American citizen Since may able read fine print stamps lines bottom read Gus tav Weiskopf 1481901 Karlo Jatho 188 1903 Gebr Wright 17121903 other photos show front back monu ment stands front Whitehead Museum Leutershausen Germany Carl Jatho August 18 1903 flew 581 sq ft biplane 9%-hp engine 59 ft altitude 2% ft Rede signed monoplane 387% sq ft handle wind autumn 1903 attained 196 ft height 11 ft flights did equate Wrights flight certain respects claimed Father Flight Guinness Book Air 7P4 03 ~ an post offices special issue Gustave Whitehead stamps above front back Whitehead monument below Whitehead Museum Leuterhausen Germany Facts Feats specifically lists successful flights still earlier birdmen People getting off groundthat history no mention Whitehead difference between Whiteheads ma chine other early-day contenders except ing Wrights described steerable claimed 1901 flight both sustained steered Whether Whitehead flights ever accepted requiring neutral evaluation bodya respect history requires Whitehead paid due effective anhi-Whitehead written statement out past shows three distinct handwritings signed near future international annual award program will begin under German spon sorshipalong lines Nobel program special awards people high achievement perhaps dozen categories including modeling have already asked yearly nominations five outstanding American modelers Old Gus might aviations Man Iron Mask Bill Winter bad news good news guys using foreign plastic folding props ones tried de cided pathetic Theres break through props least certain kinds mod el will double perhaps triple altitude several excursions pinpoint durationwith spectacular increases rate climb speed length motor run imagine stuff will published soon Back drawing board fellows weather scared off mob just Mad Test Pilot treat ing K&B 60-powered Schlepp POWR young fellow writ ten about some months backlets just call him Brad So made first test hop Jayhawk RTF keep mut tering about Kadet last year two sad OS 35sthe Kadet ended up K&B 40 35s badly beaten varnished works 35 came life smoothed out remarkably after POWR treatment sold Mad Test Pilot little RTF treated engine flew right off proving fast 40 Kadet propped Master Airscrew 9-6 looped rolled inverted wingoveredall first try underestimated ailerons Continued page 24 22 Model Aviation New Specials S795 Look Squadron/Signal Display ALL better Hobby Shops Book Stores favorite Hobby Shop Bookstore does carry Squadron/Signal books send S50 postage & handling Name Address us FREE Squadron/Signal catalog names distributors carry books Squadron/Signal Publication Dept SP2 1115 Crowley Dr Carroilton Tx 75011-5010 set up too much throw Jayhawk almost rolled first correction Max stick movement 1/8 come across things ignore strange aileron installation always cut hole through skin foam lined thin plywood epoxied servo rails front back box Maybe am vamped think RTFs fun would consider aileron trainer Its lively course am Young Brad Midwest Stik also flew LR50 electric-powered Drifter II no gearbut takes off does touch-and-goes has wire skid/strut under forward belly Stik has OS 50 12-oz tank will disappear climbing straight up like spectacular exits published Phil Krafts Stik Grid Leaks early 1960s al ways thought worlds ugliest airplane Some people hate Stiks like some Rubber Scale modelers detest Laceys like Lacey cannot beat Stik flying ability may greatest all-around free-style aerobatics machine ever concocted does things flat wing beyond What things Well hands-off flying young Brad try things Up down field went touch control ex cept turn around although finally would begin vear off its heading Slow flight almost standstill rolls like energetic puppy Brad does intentional flat spins sometimes occur crates aft balance pointand usually cannot recover chap begins regu lar spin slowly feeds opposite aileron Slowly goes flat after pinwheeling perhaps 20 times re laxes control darn thing comes out after five revolutions can blast out rudder control spin slow approach turbulent air keeps pilot busy good air speed can grease in gale must getting old could enjoy building easy flying crate once detested Hang-ups cheat Well top off Mad Test Pilot tore up place Sig Kavalier HP 40 Two years shenanigans unscratched Both crates outer limits joke about re flexes eye perception goes firstlike waiting signals outer space Another strange evening clouds winds odd mix crates some wonderful flying Saturday morning Let see search handle long disserta tion about ailerons RC jobs recent issue seems have accessed everybodys houshold Apple particu larly fine letter Charles W Bentson Continued page 26 24 Model Aviation 6156 Tne Eawrern F-roflf Astounding plastics.. discrir Either Pilotkit.. Sportsman barnstormer.. *Darn Good Airmen.. complete iiflIMAA eSatNYS Residents add 7% Sales tax APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE WHEEIS CONTROLUNEFREE-FLIGHT 000 VINTAGESMOOTHGOLDEN AGENEW sizes2l/CONTOURsIzes21/2BALLOON 3/a3423/i 343 133413/4 1342/z41/2 1144%14 33411/4 43/i31451/4 114511441/211453 1/a6/a2145141/a6 EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL Los Angeles sheds much-needed illumination support statements enclosed copies few pages mysterious book loaded what first glance seemed just erudite mysteries math over whelming diagrams wondered could decipher fine print Strangely books author seemed talking about models much real-plane long-hair stuff obviously knew score gosh reading things didnt know hooked asked Bentson what book pages came fromand chance something published Ill tell about book think masterpiece Ive read over over am still lets pick up some what Bentson say true modelers dont understand effects ailerons low-speed flight Charles began comments washin FF models especially interesting order find some answers took out Martin Si mons Model Aircraft Aerodynamics Argus Books Ltd 14 St James Rd Watford Herts England Editor may obtain book Zenith Avi ation Books PO Box 1/MA Osceola WI 54020 price $2295 item No 16061B big difference way ailerons act depending whether wing straight tapered since tips straight constant chord wing tend fly zero aerodynamic inci dence experience has tapered wings probably needed bit washout didnt have hence trimming ailerons bit up produced effect washout greatly improved low-speed handling Author As said earlier comments slight up-aileron neutral can helpnot Pattern other all-out aerobatics machines typical sport jobs like Kadet has re flexed ailerons per Claude McCulloughs Sig advice have flaps permit ting drag slightly increases angle attack inner wing compared tips gives washed-out tip effect Bentson tement down-aileron does work misleading t Martins book - indicates up-aileron has nearly equal effect down-aileron curves further indicate beyond 1 5-deg range aileron begins act like spoiler may OK up side certainly down side 2 ratio sounds good Author While knowing up-ai leron does some work always assumed work performed down-aileronen visioning down-aileron creating deep camber high CL portion wing up-aileron reflexed camber Perhaps got 26 Model Aviation SCALE RADIO CONTROL SCALE PILOTS CYUNDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS JLLLAI5SEND $1 FOR COMPLETE IUUSTRATED CATALOG EROS MA PAWNEE ST SAN MARCOS CA 9 SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013513 738-1576 Catalog Twelve page-Fully Illustrated complete details . MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC carried away Julius Irving flies higher ballerina lends magic Sixers Moses Malone also shakes up enemy troops 2 ratio refers amount up-move ment aileron equate drag down-aileron turn movements equal demands far larger vertical tail overcome down-aileron yaw plane will turn bank ratIer skew around its vertical axis may able use differen tial throws narrow strip ailerons would require ridiculous amount up compensate down-aileron large throws re quired suggests wider ailerons less movement encourage differ ential linkages proof moreup-than-down thing consider Ercoupe early models using 21 aileron differential limited rudder movement Fred Weick de signer sought prevent amateurs overly crossing controls dreaded downwind turns Because virtually old real planes ignored differential lots rud der used along ailerons pilots know about coordination days fliers Giant Scale models insist fly smoothly must coordi nate ailerons rudder use CAR transmitter mode differential being scarce hens teeth early Ercoupe no rudder barit CAR Bentson Alan Slater 85 still active aviation journalist once told about glider pilot 1 920s mistakenly assumed down-aileron did work eliminated opposite upward action went spiral dive overed difficulty go another resulted death Author Charles isnt trying prove something merely relating strange incident stress point dont know circumstances Shallow no dihedral inadequate vertical tail etc establishes down-aileron yaw could controlled tail rudder response poor man doomed such experiment oversized vertical tail would essential would sufficient dihedral powerful rudder could couple aerody namically opposite rolling mo ment three-channel RC picture Eaglet slight washin warp say right tip produces left turn aileron tip warp removed would produce same turn amount down-aile ron corresponded increased lift generated slightly warped tip As tricky standing headon top flagpole Yes agree up-aile ron does almost much work down-aileron Continued page 28 HB ENGINES 21 Grand Prix SCHNEURLE PORTED B C LETS TALK REAL POWER 105 HP @24000 RPM powerful 21 engine H B has produced date flexible engine ever designed. cylinder head can rotated position exhaust stack Rear Left Right GREAT CHOICE FOR FAN JETS Send Si 00 H B Patch Technical Information IIGENES BAVARIAN PRECISION PRODUCTS CO P0 Box 6 Dept E 22 East Avenue canaan connecticut 06840 WHY SETTLE FOR LESS can have Performance/conomy 15x 6 18x 6- 8 10 __________20x 6-8- 10 __ _________22x 81O $1800 Prices include UPS charges D MASTER CHARGE DVISA DCOD DOHECK DMONEY ORDER Dealers / DIstrIbutors Invited ___ DYNATHRUST PROPS INO 2541 NE lith Court Pompano Beach FL 33062 13059419119 Dynathrusts composite construction provides Unequaled Durability Saves money 100% accurate pitch results Outstanding Performance Air Counts October 1983 27 EXHAUST TO THE RIGHT EXHAUST TO THE LEFT s70O $1000 s140O Bring MonoKate classroom right own TV. Top Elites hour MonoKote Video Tape simple flat surfaces fillets hinges Top Elites video tape teaches basic Monokoting skills Learn right own home. per fect club showings too Purchase $3995 rented return within 30 days $2000 refund VHS BETA format available order receives valuable coupon worth up $7560 off list price 12 six foot rolls MonoKote Top Elite. helping step way Send check money order $3995 name full address choice VHS BETA format rOPFUTE MODELS INC TMonoKote Video Tape Otter 1901 N Narragansett Ave Chicago IL 60639 U 213 764-1490 CakQiC qgg IESN 13400-26 Saticoy Streel North Hollywood Calif 91605 UHEAVY DUTYSPECIAL 825I 4-IN SANDERDELUXE SYSTEM F Flit Adjustable table 101 oz HMiter guideU W4Ch letetm $100 101with metal Tx 4 Sand discs1 $300Nicods Chgr 1 3 CASH$2l95$27495 Ship$ 350CASH $15995 PBuI3inkAIR CAPITAL MODELS Ship $ 650 Lifetime SandingReady-ToFlylFB 100 Tools Grit brazedLess Radio EngineU steel Flat type 11/2 xIgSpan radius type 1 x 9 Giant Schoolyard Model Ship Ig 3/4 radius Span 46 049 061$10504061 Engine Both have coarse &engine350sqinchesReg $17995 CASH $139951 fine grits Sf8 peciy. 2-3 CH RadioShip$2500mu Reg $695 Reg $3995$400OR4VIS4 CASH $495 $2597 MORE L Catalog 75 $200 Foreign Add Calif Sales Tax CASH price shown Cards 5% higher 28 Model Aviation Bentson I experience drastically retrimming ailerons fullscale glider 1935 Rhonbuzzard restored ailerons modified half original length well-known sailplane designer However British Gliding Association test panel would test approve because origi nal aileron travel available permit fly set about find safe solution experience large RC models indicated aile ron differentials about 3 actually im proved aileron response look Schleicher K-l 8 best ailerons fleet simi lar differential retrimmed Rhonbuzzard originally-specified up ward deflection considerably red duced down travelabout 2 1 honor testing machine nearly age flown 12 years delight fly much responsive vintage gliders fitted 100-in Monterey Sail plane trailing edge ailerons along inner two-thirds wing panel Movement limited upward Aileron control crisp fast rate roll strongly recommend arrangement Author I just learned something seem have new toy Bentson I used different approach 11-ft RC Sailplane bought dirt-cheap because handled badly roll Author Charles somethingthe guy ever buy model because flew poorly conventional ailerons readjusted give some good differential rigging rest position five degrees up good handling restored able dispense over sized rudder fit much smaller rudder correct spiral sta bility Author rye just read times Unless requirements neutrally-stable alrplane probably symmetrical section Bentson just said mouthful As hacker think per ceive getting roll control out up-aileron has some down remaining net re sult has achieved differential using traditional methodsyes course could get rid oversized vertical tail have smoother-flying machine Reading book sent think means has less center-of-pressure travel much stable machine about axes earlier stall point though good fliers dont get near stall what paid get good things achieved probably immateri al learn less know did come out Chi nese fortune cookie Bentson You mentioned prob Continued page 128 r N WIN session 4-leA SPORT WINCH LightweIght 34 lbs 155kg battery Surprising performance r develops g HP Reliable & durable ity components Easy use stable electrodynamic brake help prevent backlashe Complete around parachute 600 meters go lb braided nylon line $21500 battery shipping charges included also sell finest 160 lb braided nylon contest towline $lg201600 meters plus shipping Send complete descriptive literature price list 68 Morgan Ave Danbury CT 06810 TEL203 743-3312 FASTEN YOUR SEA TBELTS! .ATTYOU CROSS THE THRESHOLD TO THE BLUE ANGELS EX PERIENCE YOU CAN NOW THRILL TO THE REAL LIFE ADVENTURE WITH SIX DARING MEN AND THEIR FLYING MACHINES SIT IN FRONT ROW COCKPIT AND SENSE THE EMOTIONS AND EXTREME CONCEN TRATION AS YOUR DOUGLAS F-4J PHANTOM GOES THROUGH ITS PACES WITH 32000 POUNDS OF THRUST TO TOP SPEED OF 1600 MPH! FULL COLOR VIDEO WITH NAR RATION AND ACTUAL SOUNDS MUSIC BY FRED MYROW 1/2 VHS D V2 Beta 1 El 1/2 Beta2 El 46 mm VIDEO $6500 K 89 min$8500 El Shipping $250 ea lilust Info Pkg $200 El refundable purchase VISA El MASTERCHARGE El Number_________ date_______ N moo _________StateZip AUDIO VISUALS INTERNATIONAL PO BOX 1390 WOODLAND WASHINGTON 98674 Nick Zirolis F4U CORSAIR 2 Cu size Engines Fibergiass Fuse age & Cowlieg aua able fur lee O5SiQC GIANT RIC SCALE PLAN DESIGNS AT6 TEXAN24 I101Span52700ppUSA POKKER DR27163Tripe$2000ppUSA PAP REARCAT2 186Span$2700ppUSA CURTISS P402 194Span$2700ppUSA FAU CORSAIR2Y 193Span$2700ppUSA Fiberglass Cowliegs & Canopies available ase Send sramp aelaileg urusnures Giaer Scale Accessurius Oar Fans seer Fusfpaid arilbin UgAl last item leave also con cerns Sailpianes sort came form short note photograph Dale Willoughby will know has vast collection documentation photographs Scale modelers available Scale Model Research Orange CA As can seen accompanying photograph subject Dales story electric-powered Sailplane-like model being launched recent US/International F3E Challenge com petition photo taken moment wind gust caused model twist launcher Dale Blacks hand Dale member Harbor Soaring Society long-time RC Sailplane Ilier momentarily forgot model whirling prop its nose quick grab straighten twisting model resulted some nasty cuts left hand Moral Dont grab business end F3E Have safe month John Preston 7012 Elvira Cr Falls Church VA 22042 Fun/Winter Continued page 28 lems inadequately-sized vertical tail area old designs Author case full-scale old-timers am great believer sticking orig inal scale size compensating providing thicker effective sec tion Most modelers completely ignore aerodynamics come tail cut out sheet material cause comparatively small size tail surfaces models need especial attention section used sug gestion square trailing edge good Author talking model aile rons flutterpointed control sur face edges probablyand Joe Bridis constant-thickness ailerons trainers Author I half-buy However smaller model tougher stick scale tail areas time get 1/5-scale larger ability hold hold scale size penal ty becomes increasingly greater de part scale airfoils resort freely flat-bottomed ones Especially thick have serious CP travel increasing angles attack thus require larger tail area symmetrical semi-symmetri cal some other scale section used first case because mon keying around might need 30% stab latter less 20% 15% less ship least 4/2 5 ft span long fuselage arm 10% would feasible some cases talk full-scale powerplane experience glider experience scanty have noted RC models sectioned stabs streamlined double-triangles end-to-end ribs fly better sheet-tailed crates dont have foggiest reason respected pilots say true Bentson Perhaps best argument upward-rigged ailerons comes modern sailplanes camber-changing flaps ailerons arranged move up down flaps Although would preferable take off aerotow flaps slightly down common practice take off least initiate takeoff run flaps up cause better aileron control obtained less likelihood wing tip touching ground case aile ron drag factor because tow attachment nose Humor guys because game plan column has gone up smoke Old-timer modelers Indoors Sailplanes FF Power etc have dozens years hands-on experience better Rubber Scalersand Wakefielders Nordic guys think Tweakers Breathers fine tuning crates seems stream consciousness us books articles aerodynamics appear written folks weve never met greater man able communicate matters far beyond us simple understandable wayand truths revealed witnessed TV worlds greatest musicians con duct Masters Classescelloist Casals exampleyou mesmerized ability true geniuses touch gestures simple words humblest student dare say Ein stein field Dr Lippisch could convey over coffee glimpse im ponderables unattainable lifetime reading Having nothing prove great teachers dont blow us away avalanches math gobbledygook contrived impress peers close loopholes criticism other elitists talking During early 1930s once sat up night reading small book aero dynamics explained airplane flew basics stability factors propeller design designer went about buildingblock process based rudimentary things probably way people like Bellanca Fokker etc wrought magic simple book seemed like Christmas Future So humble author George Page greatest designers age man produced miracles Curtiss years before war Youll never see book like again alas read About Size January 1978 Model Aviation Brad Powers experienced vision basic relationships Powers long re tired few readers knew renowned project engineer Convair participated long string re markable aircraft Somewhat like Page compressed universe rare 128 Model Aviation briefing risking ultimate simplifica tions also riled computer guys name Lippisch would have silent prob ably never heard Lippisch third thing got years ago invaluable clue mysteries sort Bentson talked about re mark own Carl Goldberg warped-in washin desired turn adjustment model would turn opposite way vertical tail too small would turn desired way surface either big enough too big observation re lates endless spectrum things see Bentsons copy Model Air craft Aerodynamics inscribed him Martin Simons Ive gone back time wonderful work Page Simons over head much time Im hacker math plotted points too understand enough discover things crudely dis cerned before didnt know saw countless ways improving models know What tells about lift distribution washout tip vortices planform aspect ratios horde other things think know related other design adjust ment problems have will shake up liver bile elemental truths What makes book appli cable models Simons scientist modeler considerable skill authority low-speed aerody namic Reynolds Number ranges apply what have impressed long series articles Australian Airborne magazine last night discovered Part Eleven reason found long-hair stuff weirdly applicable familiar world author guessed Martin Si mons Simons has interested models long can remember gets knees muddy rest us first Pou de Ciel built uncle 1934 Simons junior associate member Low Speed Aerodynamics Research Associ ation formed post-WW II England Currently senior lecturer Department Education Uni versity Adelaide spare time edits Australian Gliding pilots LS 3 racing sailplane Radio Control model airplanes holds Golden C badge two Diamonds Quoted book jacket definitive detailed work subject aerodynamics applied flying models vers entire theory flight relation model aircraft includes tables optimum airfoil sec tions dimensions scores dia grams practical illustrations take account applica tion scale effect model perform ance ows effective performance can achieved careful study aerodynamic design r pose esent practically useful form some standard aerodynamic theory applies model aeroplanes gliders Brave words consid erable understatement Thanks Charles Bentson pleasant flight Bill Winter 4426 Altura Ct Fairfax VA 22030 Scooter/K incaid Continued page 37 Lite-Ply ribs using stab template used previously drill stab horn Note didnt use Lite-Ply fuselage wing ribs used instead heavy 5-ply plywood please dont use heavy ply wood stab Use either /16 ply /32 plus /x balsa Shim up /32-in center aluminum tubes installed glued install ply ribs bottom spar Add remaining ribs cutting forward length fit Add tapered /4 sq between ply ribs LE Add TE either shimming just eye-balling ensure TE located center /4-in rib Add /x sq piecs 116-in length bottom spar between rib will add lot strength Add top spar gussets tip blocks Cut center separate two halves Add optional alu minum collars glue tubes place ready sand Finishing two things usually set off plane make certain ones look much better others lot sanding neat covering job John Hunton wrote article Model Aviation around year agoabout making using sanding blocks thats what can usually find piece X 2 x 3 hardwood about 10 12 long Using contact ce ment available add coarse paper side fine other have indicated drawing basic shapes sanded important part sand wing leading edge usually rough close razor plane make female template about ward 25% airfoil sand final shape sanding block Sanding LE sharper will make Scooter fly fasteronly stall quicker forming sanding wing tip block shape same airfoil top bottom looking end view wing Looking front view shape shown section EE tip easy shape sand some times difficult cover However believe shape gives Scooter its max imum lift tow minimum drag flight Sanding stab rudder much s4me Carve plane away excess wood sand surfaces using maximum length sanding block plug Continued page 132 SMASH SUCCESS TOLEDO! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOO KS/EQU 1PM ENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM 8 Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order consumers Guide consumers Guide P0 Box 376 Great Foils VA 22066 Send $660 Includes oostase/hendinsl canadian Orders tend $735llndudes post/hand Oversees orders send $766 Includes post/hand MA flvtAhr 1983 129 Thousands Already SOL D! First Guide Devoted Exclusively R/C Aircraft