SOMEDAY Quarter Scale Vagabond may make happy right now kingsized pain keep adding little things like Mount Everest project towers un changing Until cover things still wrong side power curve plain Jane Vagabond hides com plex personality have letters piles photos active modelers also own real thing No two alike Wait Mooney asks mutual flying friend Bill coming Vagabond Jim Jenkins also fine modeler 1981 EAA Grand Champion virtue immaculate Vagabond restored wreck some guy flew through fence trees flipped over What does take top others monstrous EAA Annual Fly-In Oshkosh clue Jenkins used 25 coats Lockhaven yellow individually sanded out further ado Jim Jenkins came across clip -scale Piper Vagabond interests like would nt belleve am restoring antique classic full-scale aircraft presently own three Vaga bonds 1940 Fairchild 24W 1950 Piper Tn-Pacer havent heard hasnt Experimental Aircraft Associ ation PA-17 Vagabond won Grand Championship last year. plans -scale Vagabond yet would very interested set want start 1/4 Vag fall next spring need info Vags am really have restored six date have own doa PA-15 Vintage Airplane October 1981 discover age 27 Jim 15 years younger restoration Airframe Rating working Power Plant Rating learned art under tutelage Jim Sr assisted restoration earlier Vag Pop A&P Al rating quite right about angular Vag abond Jim later told us people notice negative incidence horizontal stab four degrees really see side view line up bottom wing stab flight have found have trim little down elevator level flight cruise normal loads believe creates lot drag have told shortcoupled aircraft have incidence Author would have tackled Vag myself experience similarly setup mimic Airknocker model done FM 1963 balances 20% max rear chord has severe negative staband requires ample downthrust well know Vags prohibited spins because say flat-spinners Jim goes have spun Vags full nose tanks forward CG al ways pop out dime also correct wing washout tips degrees both tips keeps stubby wings flying outboard longer butt end also has 25 degrees dihedral front wing hinge fitting cabin draw string wing tip wing tip measure up 25 top front fitting engine canted down 25 degrees Author missed theorized 2-deg downthrust needed fortunately sloped firewall think need llttle Jim dad avid MA readers Jim flying 1/3-scale Druine Turbulent 21 lb Quadra bit heavy thinks scale llke flight asks about smaller Kioritz Vag model will build have OS 90 expect weigh close 20 lb hope avoid adding power will scale llke flight should fly wing 90 may weigh enough CG problem bigger engine would fine would make crate fully aerobatic know 28-lb Aristocrat flies beauti fully Tartan 132 co ever acrobatic Tartan would stand Vag its ear Quadra et al would perfect build 95% scale have very good 16 Model Aviation U lust fun Bill Winter Below Left 1/3-scale Quadra-powered Druine Turbulent Tennessee Red Daytona White built three months Jim Jenkins Dummy cylinders have added since picture taken Jenkins EAA Grand Champion 1981 fulIsize restored Vagabond re stores fullscale planes builds RC Scale jobs like mad see text Below Right PA-17 Vagabond took top EAA honors rebuilt 1979-80 wreck colored Lockhaven Yellow metallic blue trim Bottom Left During 1980-81 restored Continental A65-powered PA-17 Piper Castallian Red Daytona White Bottom Right 1969when Jim 15 years oldhe restored PA-iS first rebuild Bahama Blue Daytona White Lycoming 65-hp lob has won about 40 awards Hes real craftsman 1ALRO AIRFOIL 5PAR 62 t4 luck Jim tells us Able fly scratch-built 7-ft SR-8 Stmson Reliant 1940 Fairchild 24W scaled full-scale bird 6-ft span 54-in Beech Staggerwing good flier Enya 45 building fullscale Gee Bee E 110-hp Warner beautiful flying aircraft observes maybe Granvilles should have stuck early-model sportsters Info CAA certification flight reports original CAA/FAA microfilm data Jim would come shop Vag would fly week Traveling music fly lot see self-designed aircraft off-the-beaten-track guys efforts range Ill try thing long different mundane looking stuff involve hidden aerodynamic trickery flying site boasts few independent souls requires no calculator realize experimenters nationally run thousands clever lot stuff never gets published What might tell us hairy-dog story begins picture tyically ordinary looking crate much loved its creator Don Miller member Tn-Valley RC Club Minneapolis Since thing always leads another ended up fat folder letters pictures draw ings Dons cratesplus hints tips galore seems Don sent picture few words because photographer suggested ithes chap have apparently met Howard Evanson better known Crash will 70 years old fall Don announces have picture dad took 1917 airplane quite simple non-flying recognizable have building model planes ever since 1917 World War 1 year ot Bloody April Richthofen Red Baron zenith career time competed 1931 4th Annual Nationals Airplane Model League America Wright Field now Wright-Patterson placed ninth Mul vihill received honorable mention Outdoor Fuselage event saw first gasoline-powered modeL Au thor Thats early Bassett era Brown Junior could get fly sure excited professional engineer Don goes reflected model building Some fellows like build others design others just like fly enjoy designing 1948 1978 1 worked full-sized airplanes equipment space vehicles mostly Mer cury Apollo retired 1978 got RC both feet January 198317 Don Miller story text some originals photo above 3-view four cycle 40-powered monoplane flies like dream Don retired aerospace engineer stuff sound dollarmore sound perhaps Bill Barnes look-alike far right changeable wheels spon sons water flying 20 minutes Power K&B 60 Perry pump reverse gull wing lob near right 1948-vintage Free Flight has 8-ft span Hornet engine powerhasnt flown 40 years Bud Chappell re-lives history Martin 130 China Clipper mid-30s Spanning 74 weighing 8A lb its magnificent flier four OS 10sa commonsense way go like fourengine stuff Other good prototype possibilities include B-17 Liberator Connie Lancaster Buds beautiful flying boat has passengers crew curtains instrumentsplus famous dog Fala perhaps Don came up idea made pos sible DC-3s R4Ds Admiral Byrd took expedition Antarctic about 1947 10 15 take off carrier fly over Antarctic back baseall snow skis assume slotted wheels because retracted against bottoms nacelles Don would have gone Byrd except ad miral could have paid himand wife child Mercury program working Honeywell Don solved intricate gyro prob lem aspect reaction jets control vehicle attitude either off no proportional having make break electrical signals different rates ro tation operate 90 minutes enough go-aroundif capsule lost compression Apollo worked Astronaut Ed White design hand control vehicle attitude could controlled allowed vehicle rotate desired atti tude space sextant could used calculate departures course orient 50000-lb rocket thrust make corrections slow dosvn lunar orbit accelerate escape Don also designed strain gauges go control sticks rudder pedals first supersonic airplanes fast large air craft surfaces cannot operated directly pilot Actually strain gauges send voltage proportional load applied computer sends electrical hydraulic signals surfaces Don doesnt know work today liut designed first ones Hell surprised always talk about modelers contributions science flight whatever form takes design airplane fellows say nice words Don continues fix something around house sife says Good jobyou just saved us $50 gives good feeling think have accomplished something like little boy pulling wagon down sidewalk Some fel low admired wagon said Hey kid did get wagon boy said dad made out own head has enough wood left over make another will glad share some details handiwork other guys Dons ordinary-looking OS 40 4-cycle job uses thick airfoil Gottingen 387 bit over 15% thick root chord 12-5/8 Now Gottingen 387 would probably mean much states present-day designers full-scale airplanes used such airplanes Ford Tnmotor Lockheed Vega Fokker back 920s Fokker assume refers Trimotors et aL know models fly very low Reynolds Numbers old airplanes flew much lower Reynolds Numbers present ones think old airfoils better job present-day models present airfoils fly close Mach thick airfoils also give us much higher strength-to-weight ratios go airplane size high S-to-W ratio well high ratio high speed landing speed tip rib Clark Y chord 7 wing tips span 83 Which gives us aspect ratio 8/2 results relatively small tip loss better lift drag ratio tests Author Reference early wind-tunnel tests Gottingen 387 made 36 6-in wing six-to-one aspect ratio speed 40 mph Author directly applicable present RC models terms Reynolds Number Characteristics close Clark Y lift higher drag lot Don got us thinking about parallel-edged wings tapering thickness root tip Fokker D-VII regarded such threat Germans required destroy D-Vlls after Armisticeal though Tony Fokker smuggled train load components Holland D-VlIs cropped up 1930s such wings So phoned guru Ned Kragness has flown over 360 types NW stuff jets has owned early classics After taking wind out sailsyou get weird aerodynamics under sur face wing paramount importance lie expounded tapered wing twist what-not know importance washout twist RC wings avoid tip stalls bashed approaches Without twist tip ac tually operating higher angle attack rootdue among other things tip losses vortices etc Thus seems likely some twist merely gets tip fly same angle attack root tapered wing condition pro nounced seems likely again may need washout commonly assumed Neds interesting observations con cerned Ryan STA owned loves Vultee Vibrators Robins being wire-braced allowed him remove wash out gained 10 mphbut scared devil out myself As Chubby Checkers used sing maybe should Twist meet do-it-your self designers like Don Miller ask him about Continued page 20 IiHg SF01 LArn2ING 1EADY YET FoR ANE LAUNCIlf P b4E TV3 AJi lllrF JOIEW IAANPEP Ma CIGAIZ nO%l1EAPOF Goal ito WI AT P DO II WIlE YA NS & Regular mailings priceless Rembrandts like two past soften-em-up propaganda nefarious group Sailpianers Texas led Don Chancey McCoy-Hatfield-type fund Arkansas silent fliers led Ron Stanfield 01 Bill honorary member Arkansas group reports dastardly quip Alamo back door would no Texas Ping-Pong balls 40 paces 18 Model Aviation PULL ITLL TOGETHER KWI K-TWIST Form tightTOOL clean guy wires seconds Uses wire diameters up 032 TzjI $895 ea Cat No 301 MINI-MUFF-L-AIRE II What appears exhaust stackes really mufflers Super clean super simple MINI- fits engines 09 25 Cat No 236$695 THE FINAL FILTER KWIK-SWITCH MOUNT Set enables install battery switch anywhere fuselage drilling 3/16 hole Attractive mounts up 3/8 thick wall Cat No 203 $L75 480 Bonner Road tSr MO Wauconda Illinois 60084 USA ultimate in-line fuel filter twice much fuel filtering capacity others available Cat No 162 $175 URETHANE TUBING Will harden swell gas oil diesel fuels 24 lenghts Med Dia Cat No 208 $1 OOPkg DU BRO Large Dia Cat No PRODUCTS INC $120 Pkg crate Youll entertained probably enlightened Texas Winch Murders may hear much up about traditional rivalry Arkansas-Texas football games Writes old friend H Thomas Little Rock Well budding rivalry between Sail plane club honorary member Author Razorback Northern Virginia Texas bunch led Don Chancey breezed up last fall cleaned up annual meet meet again month better prepared few guys razor-sharp Don has ridiculing leader Ron Stanfield barrage cute warnings done two colors beautifully drawn FAST means First Arkansas Soaring Teamour club name Two recent Texas meets totals 12 10 contestants including two boys over 20 last year expect about 30 year Texas cattle drivers address loved leader Ron Stanfield Half-FAST Leader Group Captain Ron Stanfleld GC DFC B VD Mr CD After viewing accompanying illustrated ransom notes ol Bill tcmpted cut gear off Vaga bond RC-Assist attach tow hook replace K&B 19 lump lead audacity China Clipper Since days great sail ing ships words China Clipper evoke spirit adventure already flying Gas models four-engine Martin fly ing boats Pan American forged 1930s island-hopping link New World ancient Orient Until logisti cal demands WW II proved land planes could conquer great oceans due new air bases assumed future lay flying boats follow-on Boeing 307s paled beside behemoths envisioned postwar 40s Bud Chappell perceives inspirational China Clipper viable alternate having build monster aircraft satisfy ego part of us let him tell have avid modeler since 1934 glory days China Clipper en joy flying building RC Scale models Bud tells us RC experience began escapements tube-type receivers find thought model weighing 20 lb flown public terrifying totally unnecessary order enjoy complicated model aircraft example latest plane 74-in Martin M-30 China Clipper own design powered four 05 10 engines has gross weight 81/2 lb flies beautifully realistically wit nessed May 22 Brimfield MA Hydro Fly-In complicated multi-engine model profile nor stripped-down way cabin complete cur tained windows seven passengers very famous dog has complete cockpit captain copilot seats instruments etc description intended exercise self-praise Bud makes clear Rather offered proof model ers imagination expertise can scaled fit given set regulations submit have fun showing flying ffiodel size would have weighed six times much span Continued page 78 20 Model Aviation 1/4 SCALW= Nicide Plated St. -/1~ /7JWV~ V rDiscriminate Scale Fliers Dentand Dave Platt Im perfectionist kits prove reputation finest models RC scale has founded upon careful attention detail period over twenty years fact Im particular about kits theyre available personally make kit sign hold myself responsible reproductions genuine Dave Plait kit guarantee true outline combined force arrangement flies properly THE ULTIMATE legendary beauty efficiency Spitfire 1/5 scale Accurate last subtle curve Magnificient indeed lust sitting simply awe inspiring flight Powered 90 120 glo engine bra Maximizer ultimate Spitfire II provide intense experience sophisticated R/C -Span 88 Length 76 Weight 15-20 lbs $ 4F modeler Bucker Jungmeister regular direct drive engines 60 90 65 span 1/4 scale ace aerobalic hiplane time Still fits car $139 4 Ze0ierctJnitt bold flies great staying easily transportable 1/5 scale 79 span over 1000 sq ins 90 engines New 1/4 Scale Ptlot Supplied unpaint-A Also$139 ed comes in-vallabig 1/5 1/6 scale WorldRetracting struction booklet $30War II Fighter Pilots full br S25heavier ships figureComplete system 5139 HOW TO ORDERDirect Irom manulacturer no markup Write call. accept check money order Master Charge Visa cards pay UPS anywhere USA IFlorida residenis add 4% sales tax Yes accept lorvian orders pay Ireighi niormation model send sell addressed envelope nave Dlatt ivuodels inc 6940 NW 15th Street Plantation Florida 33313r Phone 305 587-4861 No ojfiiorvd oh ooy o5 oorpaoi Looking Hard Find Soarinq Goodies S7A c3a4fane 7 lory ac o has complete comprehensive line RIO Soaring products everexist North America LI Our line products includes some respected firms Europe well complete inventory own US manufacturers U We carry complete line Kits Hardware Accessories & Building Supplies have full inventory Launching Equipment & Related Products O We serve serious fl/C soaring enthusiast supplies kits other items have sought long Send $300 fully illustrated catalog Sailplane Factory PO Box 341 Red Lion PA 1 7356 717 244 4508 9am 9pm EST Fun/Winter Continued page 20 30 ft would become liabilityor put another way work worry pleasure Safety know about dont have safety rules AMA preaches safety practices clubs safety-conscious yet fear violations could cost us dearly Procedures fineup point get right down true safety private matter between mind character pilot machine obeys bid ding advance throttle assuming else has done best con scientious ability safetyfor ones self spectator other fliers property modeling itselfis entirely own minds per ception No perfect may what absolutely correct times own codes keep working bene fit correction little abbera tion ourselves become aware fly day day out weeks months years two years now writer has able watch observe put own house order Yet have serious gripes am far upset about harmless practices potentially dangerous ali monster airplanes exist Consider flight st rip strip care fully laid out distanced pits people airplane supposed take off land must expect touch-and-goes flight strip no place aerobatics fast low fly-bys Yet see accept four five airplanes time milling about overhead rolling looping inverting doing wing-overs stall turnswith cross-grain traffic occasional midair Overhead no horizontal references may know exactly pits anything else particular moment People love pour coal pull up abruptly mid-strip straight-up climb wing-over stall turn just watched Quarter Scale under test hot pilot thiswith ex tremely low top maneuver turning toward pits lining up down path No including club safety officers raised eyebrow Overhead especially right over strip good stiff necks Recently two men ships air left other pilot man dedicated safety helping beginners ramrod type Yet screaming Half-A passed back forth front meon pass no 15 ft away 10 ft up strayed near edge strip son Pattern pilot arm shoulder drag down kept yelling intel ligence ear pilot no aware ness himself Clearly did consider dangerous innocent i/oA Pylon job say half-second head must cram ourselves over flight-strip airspace piloting comfort accuracy aerobat ics best done 45 degrees elevation yourself puts plane well off end strip greatly reduces chance mishap Fly-bys passes should done beyond far side strip much possibility equipment structural fallure pilot error Continued page 120 78 Model Aviation K AIR EDUCATION & RECREATION ORGAN ISAT ION Presents Series 20 FLOWN POSTAL COMMEMORATIVE 11DAYCOVERS high quality individually designed covers will commemorate aviation achievements Golden Era flying between two World Wars recent times Covers now available follows N0] 50th Anniversary Amy Johnsons solo flight Australia 1930 N02 50th Anniversary Swissair Air Education Recreation OrganisationAERO voluntary organisation purpose promote development educational recreational activity schools colleges through medium aviation $250 US order covers send quivalent currency amount price includes postage packing Mr Harry Tripp Moor Grange High School Parkstone Avenue Leeds LS 16 6EW Yorkshire England Fun/Winter Continued page 78 involved flying low over strip front pilot line Third-order harmonics increasingly being found accident cause first learned through Bill Hershbergers experiments prevailed upon AMA publish useful table some time back am expert dont find ex perts telling us simplc stuff truly should know about should know transmit ters should within 12 ft bctter 15 ft wave-length other ficld row small pine bushes along pilot line pilots select spots tween two bushes crucial distance maintained take two frequencies beside own multiply frequency two subtract second frequency total often find two other guys set up third-order harmonic fre quency gets receiver taxi close front combinations Try calculator walked Don Srulls Spitfire out run way along taxi strip off end pilot line servos went berserkand highly selective receiver two offend ing guys happen get chummy flying antennas close together tified effect can prang landing taking-off airplaneand well down strip Put right together can hit new narrowband receiver surprisingly well up air fly stunt over strip gauche Hot passes hunger other things consider province An important letter came column Louis Guerrieri large model pilot attorney has carried us skilled impressive discussion arranged Executive Director John Worth Lous letter published AMA News section December 1982 issue rather column urge study first time someone has lent useful perspective safety question legal point view boils down fact activity necessarily involves possi bility accidents key considera tion models flown routinely safe manner Routinely active word Finally recent issue High Flight IMAA magazine excellent twopage diagram safe field layout seen through eyes big-plane fliers IMAAs map illustrates some points writer making especially concerning staying away flying strip except take off land field has enough space take precautions field layout procedures also way fly Safety depends youno else Yet us stew about monsters really should looking ourselves us everyday flying habits Bill Winter 4426 Altura Ct Fairfax VA 22030 Safety Preston Continued page 14 never never use old-style flexible nylon props anything spreading mustard hot dogs have seen training props virtually explode midair throwing lethal dag gers direction 1 20 Model Aviation N
Edition: Model Aviation - 1983/01
Page Numbers: 16, 17, 18, 20, 78, 120
SOMEDAY Quarter Scale Vagabond may make happy right now kingsized pain keep adding little things like Mount Everest project towers un changing Until cover things still wrong side power curve plain Jane Vagabond hides com plex personality have letters piles photos active modelers also own real thing No two alike Wait Mooney asks mutual flying friend Bill coming Vagabond Jim Jenkins also fine modeler 1981 EAA Grand Champion virtue immaculate Vagabond restored wreck some guy flew through fence trees flipped over What does take top others monstrous EAA Annual Fly-In Oshkosh clue Jenkins used 25 coats Lockhaven yellow individually sanded out further ado Jim Jenkins came across clip -scale Piper Vagabond interests like would nt belleve am restoring antique classic full-scale aircraft presently own three Vaga bonds 1940 Fairchild 24W 1950 Piper Tn-Pacer havent heard hasnt Experimental Aircraft Associ ation PA-17 Vagabond won Grand Championship last year. plans -scale Vagabond yet would very interested set want start 1/4 Vag fall next spring need info Vags am really have restored six date have own doa PA-15 Vintage Airplane October 1981 discover age 27 Jim 15 years younger restoration Airframe Rating working Power Plant Rating learned art under tutelage Jim Sr assisted restoration earlier Vag Pop A&P Al rating quite right about angular Vag abond Jim later told us people notice negative incidence horizontal stab four degrees really see side view line up bottom wing stab flight have found have trim little down elevator level flight cruise normal loads believe creates lot drag have told shortcoupled aircraft have incidence Author would have tackled Vag myself experience similarly setup mimic Airknocker model done FM 1963 balances 20% max rear chord has severe negative staband requires ample downthrust well know Vags prohibited spins because say flat-spinners Jim goes have spun Vags full nose tanks forward CG al ways pop out dime also correct wing washout tips degrees both tips keeps stubby wings flying outboard longer butt end also has 25 degrees dihedral front wing hinge fitting cabin draw string wing tip wing tip measure up 25 top front fitting engine canted down 25 degrees Author missed theorized 2-deg downthrust needed fortunately sloped firewall think need llttle Jim dad avid MA readers Jim flying 1/3-scale Druine Turbulent 21 lb Quadra bit heavy thinks scale llke flight asks about smaller Kioritz Vag model will build have OS 90 expect weigh close 20 lb hope avoid adding power will scale llke flight should fly wing 90 may weigh enough CG problem bigger engine would fine would make crate fully aerobatic know 28-lb Aristocrat flies beauti fully Tartan 132 co ever acrobatic Tartan would stand Vag its ear Quadra et al would perfect build 95% scale have very good 16 Model Aviation U lust fun Bill Winter Below Left 1/3-scale Quadra-powered Druine Turbulent Tennessee Red Daytona White built three months Jim Jenkins Dummy cylinders have added since picture taken Jenkins EAA Grand Champion 1981 fulIsize restored Vagabond re stores fullscale planes builds RC Scale jobs like mad see text Below Right PA-17 Vagabond took top EAA honors rebuilt 1979-80 wreck colored Lockhaven Yellow metallic blue trim Bottom Left During 1980-81 restored Continental A65-powered PA-17 Piper Castallian Red Daytona White Bottom Right 1969when Jim 15 years oldhe restored PA-iS first rebuild Bahama Blue Daytona White Lycoming 65-hp lob has won about 40 awards Hes real craftsman 1ALRO AIRFOIL 5PAR 62 t4 luck Jim tells us Able fly scratch-built 7-ft SR-8 Stmson Reliant 1940 Fairchild 24W scaled full-scale bird 6-ft span 54-in Beech Staggerwing good flier Enya 45 building fullscale Gee Bee E 110-hp Warner beautiful flying aircraft observes maybe Granvilles should have stuck early-model sportsters Info CAA certification flight reports original CAA/FAA microfilm data Jim would come shop Vag would fly week Traveling music fly lot see self-designed aircraft off-the-beaten-track guys efforts range Ill try thing long different mundane looking stuff involve hidden aerodynamic trickery flying site boasts few independent souls requires no calculator realize experimenters nationally run thousands clever lot stuff never gets published What might tell us hairy-dog story begins picture tyically ordinary looking crate much loved its creator Don Miller member Tn-Valley RC Club Minneapolis Since thing always leads another ended up fat folder letters pictures draw ings Dons cratesplus hints tips galore seems Don sent picture few words because photographer suggested ithes chap have apparently met Howard Evanson better known Crash will 70 years old fall Don announces have picture dad took 1917 airplane quite simple non-flying recognizable have building model planes ever since 1917 World War 1 year ot Bloody April Richthofen Red Baron zenith career time competed 1931 4th Annual Nationals Airplane Model League America Wright Field now Wright-Patterson placed ninth Mul vihill received honorable mention Outdoor Fuselage event saw first gasoline-powered modeL Au thor Thats early Bassett era Brown Junior could get fly sure excited professional engineer Don goes reflected model building Some fellows like build others design others just like fly enjoy designing 1948 1978 1 worked full-sized airplanes equipment space vehicles mostly Mer cury Apollo retired 1978 got RC both feet January 198317 Don Miller story text some originals photo above 3-view four cycle 40-powered monoplane flies like dream Don retired aerospace engineer stuff sound dollarmore sound perhaps Bill Barnes look-alike far right changeable wheels spon sons water flying 20 minutes Power K&B 60 Perry pump reverse gull wing lob near right 1948-vintage Free Flight has 8-ft span Hornet engine powerhasnt flown 40 years Bud Chappell re-lives history Martin 130 China Clipper mid-30s Spanning 74 weighing 8A lb its magnificent flier four OS 10sa commonsense way go like fourengine stuff Other good prototype possibilities include B-17 Liberator Connie Lancaster Buds beautiful flying boat has passengers crew curtains instrumentsplus famous dog Fala perhaps Don came up idea made pos sible DC-3s R4Ds Admiral Byrd took expedition Antarctic about 1947 10 15 take off carrier fly over Antarctic back baseall snow skis assume slotted wheels because retracted against bottoms nacelles Don would have gone Byrd except ad miral could have paid himand wife child Mercury program working Honeywell Don solved intricate gyro prob lem aspect reaction jets control vehicle attitude either off no proportional having make break electrical signals different rates ro tation operate 90 minutes enough go-aroundif capsule lost compression Apollo worked Astronaut Ed White design hand control vehicle attitude could controlled allowed vehicle rotate desired atti tude space sextant could used calculate departures course orient 50000-lb rocket thrust make corrections slow dosvn lunar orbit accelerate escape Don also designed strain gauges go control sticks rudder pedals first supersonic airplanes fast large air craft surfaces cannot operated directly pilot Actually strain gauges send voltage proportional load applied computer sends electrical hydraulic signals surfaces Don doesnt know work today liut designed first ones Hell surprised always talk about modelers contributions science flight whatever form takes design airplane fellows say nice words Don continues fix something around house sife says Good jobyou just saved us $50 gives good feeling think have accomplished something like little boy pulling wagon down sidewalk Some fel low admired wagon said Hey kid did get wagon boy said dad made out own head has enough wood left over make another will glad share some details handiwork other guys Dons ordinary-looking OS 40 4-cycle job uses thick airfoil Gottingen 387 bit over 15% thick root chord 12-5/8 Now Gottingen 387 would probably mean much states present-day designers full-scale airplanes used such airplanes Ford Tnmotor Lockheed Vega Fokker back 920s Fokker assume refers Trimotors et aL know models fly very low Reynolds Numbers old airplanes flew much lower Reynolds Numbers present ones think old airfoils better job present-day models present airfoils fly close Mach thick airfoils also give us much higher strength-to-weight ratios go airplane size high S-to-W ratio well high ratio high speed landing speed tip rib Clark Y chord 7 wing tips span 83 Which gives us aspect ratio 8/2 results relatively small tip loss better lift drag ratio tests Author Reference early wind-tunnel tests Gottingen 387 made 36 6-in wing six-to-one aspect ratio speed 40 mph Author directly applicable present RC models terms Reynolds Number Characteristics close Clark Y lift higher drag lot Don got us thinking about parallel-edged wings tapering thickness root tip Fokker D-VII regarded such threat Germans required destroy D-Vlls after Armisticeal though Tony Fokker smuggled train load components Holland D-VlIs cropped up 1930s such wings So phoned guru Ned Kragness has flown over 360 types NW stuff jets has owned early classics After taking wind out sailsyou get weird aerodynamics under sur face wing paramount importance lie expounded tapered wing twist what-not know importance washout twist RC wings avoid tip stalls bashed approaches Without twist tip ac tually operating higher angle attack rootdue among other things tip losses vortices etc Thus seems likely some twist merely gets tip fly same angle attack root tapered wing condition pro nounced seems likely again may need washout commonly assumed Neds interesting observations con cerned Ryan STA owned loves Vultee Vibrators Robins being wire-braced allowed him remove wash out gained 10 mphbut scared devil out myself As Chubby Checkers used sing maybe should Twist meet do-it-your self designers like Don Miller ask him about Continued page 20 IiHg SF01 LArn2ING 1EADY YET FoR ANE LAUNCIlf P b4E TV3 AJi lllrF JOIEW IAANPEP Ma CIGAIZ nO%l1EAPOF Goal ito WI AT P DO II WIlE YA NS & Regular mailings priceless Rembrandts like two past soften-em-up propaganda nefarious group Sailpianers Texas led Don Chancey McCoy-Hatfield-type fund Arkansas silent fliers led Ron Stanfield 01 Bill honorary member Arkansas group reports dastardly quip Alamo back door would no Texas Ping-Pong balls 40 paces 18 Model Aviation PULL ITLL TOGETHER KWI K-TWIST Form tightTOOL clean guy wires seconds Uses wire diameters up 032 TzjI $895 ea Cat No 301 MINI-MUFF-L-AIRE II What appears exhaust stackes really mufflers Super clean super simple MINI- fits engines 09 25 Cat No 236$695 THE FINAL FILTER KWIK-SWITCH MOUNT Set enables install battery switch anywhere fuselage drilling 3/16 hole Attractive mounts up 3/8 thick wall Cat No 203 $L75 480 Bonner Road tSr MO Wauconda Illinois 60084 USA ultimate in-line fuel filter twice much fuel filtering capacity others available Cat No 162 $175 URETHANE TUBING Will harden swell gas oil diesel fuels 24 lenghts Med Dia Cat No 208 $1 OOPkg DU BRO Large Dia Cat No PRODUCTS INC $120 Pkg crate Youll entertained probably enlightened Texas Winch Murders may hear much up about traditional rivalry Arkansas-Texas football games Writes old friend H Thomas Little Rock Well budding rivalry between Sail plane club honorary member Author Razorback Northern Virginia Texas bunch led Don Chancey breezed up last fall cleaned up annual meet meet again month better prepared few guys razor-sharp Don has ridiculing leader Ron Stanfield barrage cute warnings done two colors beautifully drawn FAST means First Arkansas Soaring Teamour club name Two recent Texas meets totals 12 10 contestants including two boys over 20 last year expect about 30 year Texas cattle drivers address loved leader Ron Stanfield Half-FAST Leader Group Captain Ron Stanfleld GC DFC B VD Mr CD After viewing accompanying illustrated ransom notes ol Bill tcmpted cut gear off Vaga bond RC-Assist attach tow hook replace K&B 19 lump lead audacity China Clipper Since days great sail ing ships words China Clipper evoke spirit adventure already flying Gas models four-engine Martin fly ing boats Pan American forged 1930s island-hopping link New World ancient Orient Until logisti cal demands WW II proved land planes could conquer great oceans due new air bases assumed future lay flying boats follow-on Boeing 307s paled beside behemoths envisioned postwar 40s Bud Chappell perceives inspirational China Clipper viable alternate having build monster aircraft satisfy ego part of us let him tell have avid modeler since 1934 glory days China Clipper en joy flying building RC Scale models Bud tells us RC experience began escapements tube-type receivers find thought model weighing 20 lb flown public terrifying totally unnecessary order enjoy complicated model aircraft example latest plane 74-in Martin M-30 China Clipper own design powered four 05 10 engines has gross weight 81/2 lb flies beautifully realistically wit nessed May 22 Brimfield MA Hydro Fly-In complicated multi-engine model profile nor stripped-down way cabin complete cur tained windows seven passengers very famous dog has complete cockpit captain copilot seats instruments etc description intended exercise self-praise Bud makes clear Rather offered proof model ers imagination expertise can scaled fit given set regulations submit have fun showing flying ffiodel size would have weighed six times much span Continued page 78 20 Model Aviation 1/4 SCALW= Nicide Plated St. -/1~ /7JWV~ V rDiscriminate Scale Fliers Dentand Dave Platt Im perfectionist kits prove reputation finest models RC scale has founded upon careful attention detail period over twenty years fact Im particular about kits theyre available personally make kit sign hold myself responsible reproductions genuine Dave Plait kit guarantee true outline combined force arrangement flies properly THE ULTIMATE legendary beauty efficiency Spitfire 1/5 scale Accurate last subtle curve Magnificient indeed lust sitting simply awe inspiring flight Powered 90 120 glo engine bra Maximizer ultimate Spitfire II provide intense experience sophisticated R/C -Span 88 Length 76 Weight 15-20 lbs $ 4F modeler Bucker Jungmeister regular direct drive engines 60 90 65 span 1/4 scale ace aerobalic hiplane time Still fits car $139 4 Ze0ierctJnitt bold flies great staying easily transportable 1/5 scale 79 span over 1000 sq ins 90 engines New 1/4 Scale Ptlot Supplied unpaint-A Also$139 ed comes in-vallabig 1/5 1/6 scale WorldRetracting struction booklet $30War II Fighter Pilots full br S25heavier ships figureComplete system 5139 HOW TO ORDERDirect Irom manulacturer no markup Write call. accept check money order Master Charge Visa cards pay UPS anywhere USA IFlorida residenis add 4% sales tax Yes accept lorvian orders pay Ireighi niormation model send sell addressed envelope nave Dlatt ivuodels inc 6940 NW 15th Street Plantation Florida 33313r Phone 305 587-4861 No ojfiiorvd oh ooy o5 oorpaoi Looking Hard Find Soarinq Goodies S7A c3a4fane 7 lory ac o has complete comprehensive line RIO Soaring products everexist North America LI Our line products includes some respected firms Europe well complete inventory own US manufacturers U We carry complete line Kits Hardware Accessories & Building Supplies have full inventory Launching Equipment & Related Products O We serve serious fl/C soaring enthusiast supplies kits other items have sought long Send $300 fully illustrated catalog Sailplane Factory PO Box 341 Red Lion PA 1 7356 717 244 4508 9am 9pm EST Fun/Winter Continued page 20 30 ft would become liabilityor put another way work worry pleasure Safety know about dont have safety rules AMA preaches safety practices clubs safety-conscious yet fear violations could cost us dearly Procedures fineup point get right down true safety private matter between mind character pilot machine obeys bid ding advance throttle assuming else has done best con scientious ability safetyfor ones self spectator other fliers property modeling itselfis entirely own minds per ception No perfect may what absolutely correct times own codes keep working bene fit correction little abbera tion ourselves become aware fly day day out weeks months years two years now writer has able watch observe put own house order Yet have serious gripes am far upset about harmless practices potentially dangerous ali monster airplanes exist Consider flight st rip strip care fully laid out distanced pits people airplane supposed take off land must expect touch-and-goes flight strip no place aerobatics fast low fly-bys Yet see accept four five airplanes time milling about overhead rolling looping inverting doing wing-overs stall turnswith cross-grain traffic occasional midair Overhead no horizontal references may know exactly pits anything else particular moment People love pour coal pull up abruptly mid-strip straight-up climb wing-over stall turn just watched Quarter Scale under test hot pilot thiswith ex tremely low top maneuver turning toward pits lining up down path No including club safety officers raised eyebrow Overhead especially right over strip good stiff necks Recently two men ships air left other pilot man dedicated safety helping beginners ramrod type Yet screaming Half-A passed back forth front meon pass no 15 ft away 10 ft up strayed near edge strip son Pattern pilot arm shoulder drag down kept yelling intel ligence ear pilot no aware ness himself Clearly did consider dangerous innocent i/oA Pylon job say half-second head must cram ourselves over flight-strip airspace piloting comfort accuracy aerobat ics best done 45 degrees elevation yourself puts plane well off end strip greatly reduces chance mishap Fly-bys passes should done beyond far side strip much possibility equipment structural fallure pilot error Continued page 120 78 Model Aviation K AIR EDUCATION & RECREATION ORGAN ISAT ION Presents Series 20 FLOWN POSTAL COMMEMORATIVE 11DAYCOVERS high quality individually designed covers will commemorate aviation achievements Golden Era flying between two World Wars recent times Covers now available follows N0] 50th Anniversary Amy Johnsons solo flight Australia 1930 N02 50th Anniversary Swissair Air Education Recreation OrganisationAERO voluntary organisation purpose promote development educational recreational activity schools colleges through medium aviation $250 US order covers send quivalent currency amount price includes postage packing Mr Harry Tripp Moor Grange High School Parkstone Avenue Leeds LS 16 6EW Yorkshire England Fun/Winter Continued page 78 involved flying low over strip front pilot line Third-order harmonics increasingly being found accident cause first learned through Bill Hershbergers experiments prevailed upon AMA publish useful table some time back am expert dont find ex perts telling us simplc stuff truly should know about should know transmit ters should within 12 ft bctter 15 ft wave-length other ficld row small pine bushes along pilot line pilots select spots tween two bushes crucial distance maintained take two frequencies beside own multiply frequency two subtract second frequency total often find two other guys set up third-order harmonic fre quency gets receiver taxi close front combinations Try calculator walked Don Srulls Spitfire out run way along taxi strip off end pilot line servos went berserkand highly selective receiver two offend ing guys happen get chummy flying antennas close together tified effect can prang landing taking-off airplaneand well down strip Put right together can hit new narrowband receiver surprisingly well up air fly stunt over strip gauche Hot passes hunger other things consider province An important letter came column Louis Guerrieri large model pilot attorney has carried us skilled impressive discussion arranged Executive Director John Worth Lous letter published AMA News section December 1982 issue rather column urge study first time someone has lent useful perspective safety question legal point view boils down fact activity necessarily involves possi bility accidents key considera tion models flown routinely safe manner Routinely active word Finally recent issue High Flight IMAA magazine excellent twopage diagram safe field layout seen through eyes big-plane fliers IMAAs map illustrates some points writer making especially concerning staying away flying strip except take off land field has enough space take precautions field layout procedures also way fly Safety depends youno else Yet us stew about monsters really should looking ourselves us everyday flying habits Bill Winter 4426 Altura Ct Fairfax VA 22030 Safety Preston Continued page 14 never never use old-style flexible nylon props anything spreading mustard hot dogs have seen training props virtually explode midair throwing lethal dag gers direction 1 20 Model Aviation N
Edition: Model Aviation - 1983/01
Page Numbers: 16, 17, 18, 20, 78, 120
SOMEDAY Quarter Scale Vagabond may make happy right now kingsized pain keep adding little things like Mount Everest project towers un changing Until cover things still wrong side power curve plain Jane Vagabond hides com plex personality have letters piles photos active modelers also own real thing No two alike Wait Mooney asks mutual flying friend Bill coming Vagabond Jim Jenkins also fine modeler 1981 EAA Grand Champion virtue immaculate Vagabond restored wreck some guy flew through fence trees flipped over What does take top others monstrous EAA Annual Fly-In Oshkosh clue Jenkins used 25 coats Lockhaven yellow individually sanded out further ado Jim Jenkins came across clip -scale Piper Vagabond interests like would nt belleve am restoring antique classic full-scale aircraft presently own three Vaga bonds 1940 Fairchild 24W 1950 Piper Tn-Pacer havent heard hasnt Experimental Aircraft Associ ation PA-17 Vagabond won Grand Championship last year. plans -scale Vagabond yet would very interested set want start 1/4 Vag fall next spring need info Vags am really have restored six date have own doa PA-15 Vintage Airplane October 1981 discover age 27 Jim 15 years younger restoration Airframe Rating working Power Plant Rating learned art under tutelage Jim Sr assisted restoration earlier Vag Pop A&P Al rating quite right about angular Vag abond Jim later told us people notice negative incidence horizontal stab four degrees really see side view line up bottom wing stab flight have found have trim little down elevator level flight cruise normal loads believe creates lot drag have told shortcoupled aircraft have incidence Author would have tackled Vag myself experience similarly setup mimic Airknocker model done FM 1963 balances 20% max rear chord has severe negative staband requires ample downthrust well know Vags prohibited spins because say flat-spinners Jim goes have spun Vags full nose tanks forward CG al ways pop out dime also correct wing washout tips degrees both tips keeps stubby wings flying outboard longer butt end also has 25 degrees dihedral front wing hinge fitting cabin draw string wing tip wing tip measure up 25 top front fitting engine canted down 25 degrees Author missed theorized 2-deg downthrust needed fortunately sloped firewall think need llttle Jim dad avid MA readers Jim flying 1/3-scale Druine Turbulent 21 lb Quadra bit heavy thinks scale llke flight asks about smaller Kioritz Vag model will build have OS 90 expect weigh close 20 lb hope avoid adding power will scale llke flight should fly wing 90 may weigh enough CG problem bigger engine would fine would make crate fully aerobatic know 28-lb Aristocrat flies beauti fully Tartan 132 co ever acrobatic Tartan would stand Vag its ear Quadra et al would perfect build 95% scale have very good 16 Model Aviation U lust fun Bill Winter Below Left 1/3-scale Quadra-powered Druine Turbulent Tennessee Red Daytona White built three months Jim Jenkins Dummy cylinders have added since picture taken Jenkins EAA Grand Champion 1981 fulIsize restored Vagabond re stores fullscale planes builds RC Scale jobs like mad see text Below Right PA-17 Vagabond took top EAA honors rebuilt 1979-80 wreck colored Lockhaven Yellow metallic blue trim Bottom Left During 1980-81 restored Continental A65-powered PA-17 Piper Castallian Red Daytona White Bottom Right 1969when Jim 15 years oldhe restored PA-iS first rebuild Bahama Blue Daytona White Lycoming 65-hp lob has won about 40 awards Hes real craftsman 1ALRO AIRFOIL 5PAR 62 t4 luck Jim tells us Able fly scratch-built 7-ft SR-8 Stmson Reliant 1940 Fairchild 24W scaled full-scale bird 6-ft span 54-in Beech Staggerwing good flier Enya 45 building fullscale Gee Bee E 110-hp Warner beautiful flying aircraft observes maybe Granvilles should have stuck early-model sportsters Info CAA certification flight reports original CAA/FAA microfilm data Jim would come shop Vag would fly week Traveling music fly lot see self-designed aircraft off-the-beaten-track guys efforts range Ill try thing long different mundane looking stuff involve hidden aerodynamic trickery flying site boasts few independent souls requires no calculator realize experimenters nationally run thousands clever lot stuff never gets published What might tell us hairy-dog story begins picture tyically ordinary looking crate much loved its creator Don Miller member Tn-Valley RC Club Minneapolis Since thing always leads another ended up fat folder letters pictures draw ings Dons cratesplus hints tips galore seems Don sent picture few words because photographer suggested ithes chap have apparently met Howard Evanson better known Crash will 70 years old fall Don announces have picture dad took 1917 airplane quite simple non-flying recognizable have building model planes ever since 1917 World War 1 year ot Bloody April Richthofen Red Baron zenith career time competed 1931 4th Annual Nationals Airplane Model League America Wright Field now Wright-Patterson placed ninth Mul vihill received honorable mention Outdoor Fuselage event saw first gasoline-powered modeL Au thor Thats early Bassett era Brown Junior could get fly sure excited professional engineer Don goes reflected model building Some fellows like build others design others just like fly enjoy designing 1948 1978 1 worked full-sized airplanes equipment space vehicles mostly Mer cury Apollo retired 1978 got RC both feet January 198317 Don Miller story text some originals photo above 3-view four cycle 40-powered monoplane flies like dream Don retired aerospace engineer stuff sound dollarmore sound perhaps Bill Barnes look-alike far right changeable wheels spon sons water flying 20 minutes Power K&B 60 Perry pump reverse gull wing lob near right 1948-vintage Free Flight has 8-ft span Hornet engine powerhasnt flown 40 years Bud Chappell re-lives history Martin 130 China Clipper mid-30s Spanning 74 weighing 8A lb its magnificent flier four OS 10sa commonsense way go like fourengine stuff Other good prototype possibilities include B-17 Liberator Connie Lancaster Buds beautiful flying boat has passengers crew curtains instrumentsplus famous dog Fala perhaps Don came up idea made pos sible DC-3s R4Ds Admiral Byrd took expedition Antarctic about 1947 10 15 take off carrier fly over Antarctic back baseall snow skis assume slotted wheels because retracted against bottoms nacelles Don would have gone Byrd except ad miral could have paid himand wife child Mercury program working Honeywell Don solved intricate gyro prob lem aspect reaction jets control vehicle attitude either off no proportional having make break electrical signals different rates ro tation operate 90 minutes enough go-aroundif capsule lost compression Apollo worked Astronaut Ed White design hand control vehicle attitude could controlled allowed vehicle rotate desired atti tude space sextant could used calculate departures course orient 50000-lb rocket thrust make corrections slow dosvn lunar orbit accelerate escape Don also designed strain gauges go control sticks rudder pedals first supersonic airplanes fast large air craft surfaces cannot operated directly pilot Actually strain gauges send voltage proportional load applied computer sends electrical hydraulic signals surfaces Don doesnt know work today liut designed first ones Hell surprised always talk about modelers contributions science flight whatever form takes design airplane fellows say nice words Don continues fix something around house sife says Good jobyou just saved us $50 gives good feeling think have accomplished something like little boy pulling wagon down sidewalk Some fel low admired wagon said Hey kid did get wagon boy said dad made out own head has enough wood left over make another will glad share some details handiwork other guys Dons ordinary-looking OS 40 4-cycle job uses thick airfoil Gottingen 387 bit over 15% thick root chord 12-5/8 Now Gottingen 387 would probably mean much states present-day designers full-scale airplanes used such airplanes Ford Tnmotor Lockheed Vega Fokker back 920s Fokker assume refers Trimotors et aL know models fly very low Reynolds Numbers old airplanes flew much lower Reynolds Numbers present ones think old airfoils better job present-day models present airfoils fly close Mach thick airfoils also give us much higher strength-to-weight ratios go airplane size high S-to-W ratio well high ratio high speed landing speed tip rib Clark Y chord 7 wing tips span 83 Which gives us aspect ratio 8/2 results relatively small tip loss better lift drag ratio tests Author Reference early wind-tunnel tests Gottingen 387 made 36 6-in wing six-to-one aspect ratio speed 40 mph Author directly applicable present RC models terms Reynolds Number Characteristics close Clark Y lift higher drag lot Don got us thinking about parallel-edged wings tapering thickness root tip Fokker D-VII regarded such threat Germans required destroy D-Vlls after Armisticeal though Tony Fokker smuggled train load components Holland D-VlIs cropped up 1930s such wings So phoned guru Ned Kragness has flown over 360 types NW stuff jets has owned early classics After taking wind out sailsyou get weird aerodynamics under sur face wing paramount importance lie expounded tapered wing twist what-not know importance washout twist RC wings avoid tip stalls bashed approaches Without twist tip ac tually operating higher angle attack rootdue among other things tip losses vortices etc Thus seems likely some twist merely gets tip fly same angle attack root tapered wing condition pro nounced seems likely again may need washout commonly assumed Neds interesting observations con cerned Ryan STA owned loves Vultee Vibrators Robins being wire-braced allowed him remove wash out gained 10 mphbut scared devil out myself As Chubby Checkers used sing maybe should Twist meet do-it-your self designers like Don Miller ask him about Continued page 20 IiHg SF01 LArn2ING 1EADY YET FoR ANE LAUNCIlf P b4E TV3 AJi lllrF JOIEW IAANPEP Ma CIGAIZ nO%l1EAPOF Goal ito WI AT P DO II WIlE YA NS & Regular mailings priceless Rembrandts like two past soften-em-up propaganda nefarious group Sailpianers Texas led Don Chancey McCoy-Hatfield-type fund Arkansas silent fliers led Ron Stanfield 01 Bill honorary member Arkansas group reports dastardly quip Alamo back door would no Texas Ping-Pong balls 40 paces 18 Model Aviation PULL ITLL TOGETHER KWI K-TWIST Form tightTOOL clean guy wires seconds Uses wire diameters up 032 TzjI $895 ea Cat No 301 MINI-MUFF-L-AIRE II What appears exhaust stackes really mufflers Super clean super simple MINI- fits engines 09 25 Cat No 236$695 THE FINAL FILTER KWIK-SWITCH MOUNT Set enables install battery switch anywhere fuselage drilling 3/16 hole Attractive mounts up 3/8 thick wall Cat No 203 $L75 480 Bonner Road tSr MO Wauconda Illinois 60084 USA ultimate in-line fuel filter twice much fuel filtering capacity others available Cat No 162 $175 URETHANE TUBING Will harden swell gas oil diesel fuels 24 lenghts Med Dia Cat No 208 $1 OOPkg DU BRO Large Dia Cat No PRODUCTS INC $120 Pkg crate Youll entertained probably enlightened Texas Winch Murders may hear much up about traditional rivalry Arkansas-Texas football games Writes old friend H Thomas Little Rock Well budding rivalry between Sail plane club honorary member Author Razorback Northern Virginia Texas bunch led Don Chancey breezed up last fall cleaned up annual meet meet again month better prepared few guys razor-sharp Don has ridiculing leader Ron Stanfield barrage cute warnings done two colors beautifully drawn FAST means First Arkansas Soaring Teamour club name Two recent Texas meets totals 12 10 contestants including two boys over 20 last year expect about 30 year Texas cattle drivers address loved leader Ron Stanfield Half-FAST Leader Group Captain Ron Stanfleld GC DFC B VD Mr CD After viewing accompanying illustrated ransom notes ol Bill tcmpted cut gear off Vaga bond RC-Assist attach tow hook replace K&B 19 lump lead audacity China Clipper Since days great sail ing ships words China Clipper evoke spirit adventure already flying Gas models four-engine Martin fly ing boats Pan American forged 1930s island-hopping link New World ancient Orient Until logisti cal demands WW II proved land planes could conquer great oceans due new air bases assumed future lay flying boats follow-on Boeing 307s paled beside behemoths envisioned postwar 40s Bud Chappell perceives inspirational China Clipper viable alternate having build monster aircraft satisfy ego part of us let him tell have avid modeler since 1934 glory days China Clipper en joy flying building RC Scale models Bud tells us RC experience began escapements tube-type receivers find thought model weighing 20 lb flown public terrifying totally unnecessary order enjoy complicated model aircraft example latest plane 74-in Martin M-30 China Clipper own design powered four 05 10 engines has gross weight 81/2 lb flies beautifully realistically wit nessed May 22 Brimfield MA Hydro Fly-In complicated multi-engine model profile nor stripped-down way cabin complete cur tained windows seven passengers very famous dog has complete cockpit captain copilot seats instruments etc description intended exercise self-praise Bud makes clear Rather offered proof model ers imagination expertise can scaled fit given set regulations submit have fun showing flying ffiodel size would have weighed six times much span Continued page 78 20 Model Aviation 1/4 SCALW= Nicide Plated St. -/1~ /7JWV~ V rDiscriminate Scale Fliers Dentand Dave Platt Im perfectionist kits prove reputation finest models RC scale has founded upon careful attention detail period over twenty years fact Im particular about kits theyre available personally make kit sign hold myself responsible reproductions genuine Dave Plait kit guarantee true outline combined force arrangement flies properly THE ULTIMATE legendary beauty efficiency Spitfire 1/5 scale Accurate last subtle curve Magnificient indeed lust sitting simply awe inspiring flight Powered 90 120 glo engine bra Maximizer ultimate Spitfire II provide intense experience sophisticated R/C -Span 88 Length 76 Weight 15-20 lbs $ 4F modeler Bucker Jungmeister regular direct drive engines 60 90 65 span 1/4 scale ace aerobalic hiplane time Still fits car $139 4 Ze0ierctJnitt bold flies great staying easily transportable 1/5 scale 79 span over 1000 sq ins 90 engines New 1/4 Scale Ptlot Supplied unpaint-A Also$139 ed comes in-vallabig 1/5 1/6 scale WorldRetracting struction booklet $30War II Fighter Pilots full br S25heavier ships figureComplete system 5139 HOW TO ORDERDirect Irom manulacturer no markup Write call. accept check money order Master Charge Visa cards pay UPS anywhere USA IFlorida residenis add 4% sales tax Yes accept lorvian orders pay Ireighi niormation model send sell addressed envelope nave Dlatt ivuodels inc 6940 NW 15th Street Plantation Florida 33313r Phone 305 587-4861 No ojfiiorvd oh ooy o5 oorpaoi Looking Hard Find Soarinq Goodies S7A c3a4fane 7 lory ac o has complete comprehensive line RIO Soaring products everexist North America LI Our line products includes some respected firms Europe well complete inventory own US manufacturers U We carry complete line Kits Hardware Accessories & Building Supplies have full inventory Launching Equipment & Related Products O We serve serious fl/C soaring enthusiast supplies kits other items have sought long Send $300 fully illustrated catalog Sailplane Factory PO Box 341 Red Lion PA 1 7356 717 244 4508 9am 9pm EST Fun/Winter Continued page 20 30 ft would become liabilityor put another way work worry pleasure Safety know about dont have safety rules AMA preaches safety practices clubs safety-conscious yet fear violations could cost us dearly Procedures fineup point get right down true safety private matter between mind character pilot machine obeys bid ding advance throttle assuming else has done best con scientious ability safetyfor ones self spectator other fliers property modeling itselfis entirely own minds per ception No perfect may what absolutely correct times own codes keep working bene fit correction little abbera tion ourselves become aware fly day day out weeks months years two years now writer has able watch observe put own house order Yet have serious gripes am far upset about harmless practices potentially dangerous ali monster airplanes exist Consider flight st rip strip care fully laid out distanced pits people airplane supposed take off land must expect touch-and-goes flight strip no place aerobatics fast low fly-bys Yet see accept four five airplanes time milling about overhead rolling looping inverting doing wing-overs stall turnswith cross-grain traffic occasional midair Overhead no horizontal references may know exactly pits anything else particular moment People love pour coal pull up abruptly mid-strip straight-up climb wing-over stall turn just watched Quarter Scale under test hot pilot thiswith ex tremely low top maneuver turning toward pits lining up down path No including club safety officers raised eyebrow Overhead especially right over strip good stiff necks Recently two men ships air left other pilot man dedicated safety helping beginners ramrod type Yet screaming Half-A passed back forth front meon pass no 15 ft away 10 ft up strayed near edge strip son Pattern pilot arm shoulder drag down kept yelling intel ligence ear pilot no aware ness himself Clearly did consider dangerous innocent i/oA Pylon job say half-second head must cram ourselves over flight-strip airspace piloting comfort accuracy aerobat ics best done 45 degrees elevation yourself puts plane well off end strip greatly reduces chance mishap Fly-bys passes should done beyond far side strip much possibility equipment structural fallure pilot error Continued page 120 78 Model Aviation K AIR EDUCATION & RECREATION ORGAN ISAT ION Presents Series 20 FLOWN POSTAL COMMEMORATIVE 11DAYCOVERS high quality individually designed covers will commemorate aviation achievements Golden Era flying between two World Wars recent times Covers now available follows N0] 50th Anniversary Amy Johnsons solo flight Australia 1930 N02 50th Anniversary Swissair Air Education Recreation OrganisationAERO voluntary organisation purpose promote development educational recreational activity schools colleges through medium aviation $250 US order covers send quivalent currency amount price includes postage packing Mr Harry Tripp Moor Grange High School Parkstone Avenue Leeds LS 16 6EW Yorkshire England Fun/Winter Continued page 78 involved flying low over strip front pilot line Third-order harmonics increasingly being found accident cause first learned through Bill Hershbergers experiments prevailed upon AMA publish useful table some time back am expert dont find ex perts telling us simplc stuff truly should know about should know transmit ters should within 12 ft bctter 15 ft wave-length other ficld row small pine bushes along pilot line pilots select spots tween two bushes crucial distance maintained take two frequencies beside own multiply frequency two subtract second frequency total often find two other guys set up third-order harmonic fre quency gets receiver taxi close front combinations Try calculator walked Don Srulls Spitfire out run way along taxi strip off end pilot line servos went berserkand highly selective receiver two offend ing guys happen get chummy flying antennas close together tified effect can prang landing taking-off airplaneand well down strip Put right together can hit new narrowband receiver surprisingly well up air fly stunt over strip gauche Hot passes hunger other things consider province An important letter came column Louis Guerrieri large model pilot attorney has carried us skilled impressive discussion arranged Executive Director John Worth Lous letter published AMA News section December 1982 issue rather column urge study first time someone has lent useful perspective safety question legal point view boils down fact activity necessarily involves possi bility accidents key considera tion models flown routinely safe manner Routinely active word Finally recent issue High Flight IMAA magazine excellent twopage diagram safe field layout seen through eyes big-plane fliers IMAAs map illustrates some points writer making especially concerning staying away flying strip except take off land field has enough space take precautions field layout procedures also way fly Safety depends youno else Yet us stew about monsters really should looking ourselves us everyday flying habits Bill Winter 4426 Altura Ct Fairfax VA 22030 Safety Preston Continued page 14 never never use old-style flexible nylon props anything spreading mustard hot dogs have seen training props virtually explode midair throwing lethal dag gers direction 1 20 Model Aviation N
Edition: Model Aviation - 1983/01
Page Numbers: 16, 17, 18, 20, 78, 120
SOMEDAY Quarter Scale Vagabond may make happy right now kingsized pain keep adding little things like Mount Everest project towers un changing Until cover things still wrong side power curve plain Jane Vagabond hides com plex personality have letters piles photos active modelers also own real thing No two alike Wait Mooney asks mutual flying friend Bill coming Vagabond Jim Jenkins also fine modeler 1981 EAA Grand Champion virtue immaculate Vagabond restored wreck some guy flew through fence trees flipped over What does take top others monstrous EAA Annual Fly-In Oshkosh clue Jenkins used 25 coats Lockhaven yellow individually sanded out further ado Jim Jenkins came across clip -scale Piper Vagabond interests like would nt belleve am restoring antique classic full-scale aircraft presently own three Vaga bonds 1940 Fairchild 24W 1950 Piper Tn-Pacer havent heard hasnt Experimental Aircraft Associ ation PA-17 Vagabond won Grand Championship last year. plans -scale Vagabond yet would very interested set want start 1/4 Vag fall next spring need info Vags am really have restored six date have own doa PA-15 Vintage Airplane October 1981 discover age 27 Jim 15 years younger restoration Airframe Rating working Power Plant Rating learned art under tutelage Jim Sr assisted restoration earlier Vag Pop A&P Al rating quite right about angular Vag abond Jim later told us people notice negative incidence horizontal stab four degrees really see side view line up bottom wing stab flight have found have trim little down elevator level flight cruise normal loads believe creates lot drag have told shortcoupled aircraft have incidence Author would have tackled Vag myself experience similarly setup mimic Airknocker model done FM 1963 balances 20% max rear chord has severe negative staband requires ample downthrust well know Vags prohibited spins because say flat-spinners Jim goes have spun Vags full nose tanks forward CG al ways pop out dime also correct wing washout tips degrees both tips keeps stubby wings flying outboard longer butt end also has 25 degrees dihedral front wing hinge fitting cabin draw string wing tip wing tip measure up 25 top front fitting engine canted down 25 degrees Author missed theorized 2-deg downthrust needed fortunately sloped firewall think need llttle Jim dad avid MA readers Jim flying 1/3-scale Druine Turbulent 21 lb Quadra bit heavy thinks scale llke flight asks about smaller Kioritz Vag model will build have OS 90 expect weigh close 20 lb hope avoid adding power will scale llke flight should fly wing 90 may weigh enough CG problem bigger engine would fine would make crate fully aerobatic know 28-lb Aristocrat flies beauti fully Tartan 132 co ever acrobatic Tartan would stand Vag its ear Quadra et al would perfect build 95% scale have very good 16 Model Aviation U lust fun Bill Winter Below Left 1/3-scale Quadra-powered Druine Turbulent Tennessee Red Daytona White built three months Jim Jenkins Dummy cylinders have added since picture taken Jenkins EAA Grand Champion 1981 fulIsize restored Vagabond re stores fullscale planes builds RC Scale jobs like mad see text Below Right PA-17 Vagabond took top EAA honors rebuilt 1979-80 wreck colored Lockhaven Yellow metallic blue trim Bottom Left During 1980-81 restored Continental A65-powered PA-17 Piper Castallian Red Daytona White Bottom Right 1969when Jim 15 years oldhe restored PA-iS first rebuild Bahama Blue Daytona White Lycoming 65-hp lob has won about 40 awards Hes real craftsman 1ALRO AIRFOIL 5PAR 62 t4 luck Jim tells us Able fly scratch-built 7-ft SR-8 Stmson Reliant 1940 Fairchild 24W scaled full-scale bird 6-ft span 54-in Beech Staggerwing good flier Enya 45 building fullscale Gee Bee E 110-hp Warner beautiful flying aircraft observes maybe Granvilles should have stuck early-model sportsters Info CAA certification flight reports original CAA/FAA microfilm data Jim would come shop Vag would fly week Traveling music fly lot see self-designed aircraft off-the-beaten-track guys efforts range Ill try thing long different mundane looking stuff involve hidden aerodynamic trickery flying site boasts few independent souls requires no calculator realize experimenters nationally run thousands clever lot stuff never gets published What might tell us hairy-dog story begins picture tyically ordinary looking crate much loved its creator Don Miller member Tn-Valley RC Club Minneapolis Since thing always leads another ended up fat folder letters pictures draw ings Dons cratesplus hints tips galore seems Don sent picture few words because photographer suggested ithes chap have apparently met Howard Evanson better known Crash will 70 years old fall Don announces have picture dad took 1917 airplane quite simple non-flying recognizable have building model planes ever since 1917 World War 1 year ot Bloody April Richthofen Red Baron zenith career time competed 1931 4th Annual Nationals Airplane Model League America Wright Field now Wright-Patterson placed ninth Mul vihill received honorable mention Outdoor Fuselage event saw first gasoline-powered modeL Au thor Thats early Bassett era Brown Junior could get fly sure excited professional engineer Don goes reflected model building Some fellows like build others design others just like fly enjoy designing 1948 1978 1 worked full-sized airplanes equipment space vehicles mostly Mer cury Apollo retired 1978 got RC both feet January 198317 Don Miller story text some originals photo above 3-view four cycle 40-powered monoplane flies like dream Don retired aerospace engineer stuff sound dollarmore sound perhaps Bill Barnes look-alike far right changeable wheels spon sons water flying 20 minutes Power K&B 60 Perry pump reverse gull wing lob near right 1948-vintage Free Flight has 8-ft span Hornet engine powerhasnt flown 40 years Bud Chappell re-lives history Martin 130 China Clipper mid-30s Spanning 74 weighing 8A lb its magnificent flier four OS 10sa commonsense way go like fourengine stuff Other good prototype possibilities include B-17 Liberator Connie Lancaster Buds beautiful flying boat has passengers crew curtains instrumentsplus famous dog Fala perhaps Don came up idea made pos sible DC-3s R4Ds Admiral Byrd took expedition Antarctic about 1947 10 15 take off carrier fly over Antarctic back baseall snow skis assume slotted wheels because retracted against bottoms nacelles Don would have gone Byrd except ad miral could have paid himand wife child Mercury program working Honeywell Don solved intricate gyro prob lem aspect reaction jets control vehicle attitude either off no proportional having make break electrical signals different rates ro tation operate 90 minutes enough go-aroundif capsule lost compression Apollo worked Astronaut Ed White design hand control vehicle attitude could controlled allowed vehicle rotate desired atti tude space sextant could used calculate departures course orient 50000-lb rocket thrust make corrections slow dosvn lunar orbit accelerate escape Don also designed strain gauges go control sticks rudder pedals first supersonic airplanes fast large air craft surfaces cannot operated directly pilot Actually strain gauges send voltage proportional load applied computer sends electrical hydraulic signals surfaces Don doesnt know work today liut designed first ones Hell surprised always talk about modelers contributions science flight whatever form takes design airplane fellows say nice words Don continues fix something around house sife says Good jobyou just saved us $50 gives good feeling think have accomplished something like little boy pulling wagon down sidewalk Some fel low admired wagon said Hey kid did get wagon boy said dad made out own head has enough wood left over make another will glad share some details handiwork other guys Dons ordinary-looking OS 40 4-cycle job uses thick airfoil Gottingen 387 bit over 15% thick root chord 12-5/8 Now Gottingen 387 would probably mean much states present-day designers full-scale airplanes used such airplanes Ford Tnmotor Lockheed Vega Fokker back 920s Fokker assume refers Trimotors et aL know models fly very low Reynolds Numbers old airplanes flew much lower Reynolds Numbers present ones think old airfoils better job present-day models present airfoils fly close Mach thick airfoils also give us much higher strength-to-weight ratios go airplane size high S-to-W ratio well high ratio high speed landing speed tip rib Clark Y chord 7 wing tips span 83 Which gives us aspect ratio 8/2 results relatively small tip loss better lift drag ratio tests Author Reference early wind-tunnel tests Gottingen 387 made 36 6-in wing six-to-one aspect ratio speed 40 mph Author directly applicable present RC models terms Reynolds Number Characteristics close Clark Y lift higher drag lot Don got us thinking about parallel-edged wings tapering thickness root tip Fokker D-VII regarded such threat Germans required destroy D-Vlls after Armisticeal though Tony Fokker smuggled train load components Holland D-VlIs cropped up 1930s such wings So phoned guru Ned Kragness has flown over 360 types NW stuff jets has owned early classics After taking wind out sailsyou get weird aerodynamics under sur face wing paramount importance lie expounded tapered wing twist what-not know importance washout twist RC wings avoid tip stalls bashed approaches Without twist tip ac tually operating higher angle attack rootdue among other things tip losses vortices etc Thus seems likely some twist merely gets tip fly same angle attack root tapered wing condition pro nounced seems likely again may need washout commonly assumed Neds interesting observations con cerned Ryan STA owned loves Vultee Vibrators Robins being wire-braced allowed him remove wash out gained 10 mphbut scared devil out myself As Chubby Checkers used sing maybe should Twist meet do-it-your self designers like Don Miller ask him about Continued page 20 IiHg SF01 LArn2ING 1EADY YET FoR ANE LAUNCIlf P b4E TV3 AJi lllrF JOIEW IAANPEP Ma CIGAIZ nO%l1EAPOF Goal ito WI AT P DO II WIlE YA NS & Regular mailings priceless Rembrandts like two past soften-em-up propaganda nefarious group Sailpianers Texas led Don Chancey McCoy-Hatfield-type fund Arkansas silent fliers led Ron Stanfield 01 Bill honorary member Arkansas group reports dastardly quip Alamo back door would no Texas Ping-Pong balls 40 paces 18 Model Aviation PULL ITLL TOGETHER KWI K-TWIST Form tightTOOL clean guy wires seconds Uses wire diameters up 032 TzjI $895 ea Cat No 301 MINI-MUFF-L-AIRE II What appears exhaust stackes really mufflers Super clean super simple MINI- fits engines 09 25 Cat No 236$695 THE FINAL FILTER KWIK-SWITCH MOUNT Set enables install battery switch anywhere fuselage drilling 3/16 hole Attractive mounts up 3/8 thick wall Cat No 203 $L75 480 Bonner Road tSr MO Wauconda Illinois 60084 USA ultimate in-line fuel filter twice much fuel filtering capacity others available Cat No 162 $175 URETHANE TUBING Will harden swell gas oil diesel fuels 24 lenghts Med Dia Cat No 208 $1 OOPkg DU BRO Large Dia Cat No PRODUCTS INC $120 Pkg crate Youll entertained probably enlightened Texas Winch Murders may hear much up about traditional rivalry Arkansas-Texas football games Writes old friend H Thomas Little Rock Well budding rivalry between Sail plane club honorary member Author Razorback Northern Virginia Texas bunch led Don Chancey breezed up last fall cleaned up annual meet meet again month better prepared few guys razor-sharp Don has ridiculing leader Ron Stanfield barrage cute warnings done two colors beautifully drawn FAST means First Arkansas Soaring Teamour club name Two recent Texas meets totals 12 10 contestants including two boys over 20 last year expect about 30 year Texas cattle drivers address loved leader Ron Stanfield Half-FAST Leader Group Captain Ron Stanfleld GC DFC B VD Mr CD After viewing accompanying illustrated ransom notes ol Bill tcmpted cut gear off Vaga bond RC-Assist attach tow hook replace K&B 19 lump lead audacity China Clipper Since days great sail ing ships words China Clipper evoke spirit adventure already flying Gas models four-engine Martin fly ing boats Pan American forged 1930s island-hopping link New World ancient Orient Until logisti cal demands WW II proved land planes could conquer great oceans due new air bases assumed future lay flying boats follow-on Boeing 307s paled beside behemoths envisioned postwar 40s Bud Chappell perceives inspirational China Clipper viable alternate having build monster aircraft satisfy ego part of us let him tell have avid modeler since 1934 glory days China Clipper en joy flying building RC Scale models Bud tells us RC experience began escapements tube-type receivers find thought model weighing 20 lb flown public terrifying totally unnecessary order enjoy complicated model aircraft example latest plane 74-in Martin M-30 China Clipper own design powered four 05 10 engines has gross weight 81/2 lb flies beautifully realistically wit nessed May 22 Brimfield MA Hydro Fly-In complicated multi-engine model profile nor stripped-down way cabin complete cur tained windows seven passengers very famous dog has complete cockpit captain copilot seats instruments etc description intended exercise self-praise Bud makes clear Rather offered proof model ers imagination expertise can scaled fit given set regulations submit have fun showing flying ffiodel size would have weighed six times much span Continued page 78 20 Model Aviation 1/4 SCALW= Nicide Plated St. -/1~ /7JWV~ V rDiscriminate Scale Fliers Dentand Dave Platt Im perfectionist kits prove reputation finest models RC scale has founded upon careful attention detail period over twenty years fact Im particular about kits theyre available personally make kit sign hold myself responsible reproductions genuine Dave Plait kit guarantee true outline combined force arrangement flies properly THE ULTIMATE legendary beauty efficiency Spitfire 1/5 scale Accurate last subtle curve Magnificient indeed lust sitting simply awe inspiring flight Powered 90 120 glo engine bra Maximizer ultimate Spitfire II provide intense experience sophisticated R/C -Span 88 Length 76 Weight 15-20 lbs $ 4F modeler Bucker Jungmeister regular direct drive engines 60 90 65 span 1/4 scale ace aerobalic hiplane time Still fits car $139 4 Ze0ierctJnitt bold flies great staying easily transportable 1/5 scale 79 span over 1000 sq ins 90 engines New 1/4 Scale Ptlot Supplied unpaint-A Also$139 ed comes in-vallabig 1/5 1/6 scale WorldRetracting struction booklet $30War II Fighter Pilots full br S25heavier ships figureComplete system 5139 HOW TO ORDERDirect Irom manulacturer no markup Write call. accept check money order Master Charge Visa cards pay UPS anywhere USA IFlorida residenis add 4% sales tax Yes accept lorvian orders pay Ireighi niormation model send sell addressed envelope nave Dlatt ivuodels inc 6940 NW 15th Street Plantation Florida 33313r Phone 305 587-4861 No ojfiiorvd oh ooy o5 oorpaoi Looking Hard Find Soarinq Goodies S7A c3a4fane 7 lory ac o has complete comprehensive line RIO Soaring products everexist North America LI Our line products includes some respected firms Europe well complete inventory own US manufacturers U We carry complete line Kits Hardware Accessories & Building Supplies have full inventory Launching Equipment & Related Products O We serve serious fl/C soaring enthusiast supplies kits other items have sought long Send $300 fully illustrated catalog Sailplane Factory PO Box 341 Red Lion PA 1 7356 717 244 4508 9am 9pm EST Fun/Winter Continued page 20 30 ft would become liabilityor put another way work worry pleasure Safety know about dont have safety rules AMA preaches safety practices clubs safety-conscious yet fear violations could cost us dearly Procedures fineup point get right down true safety private matter between mind character pilot machine obeys bid ding advance throttle assuming else has done best con scientious ability safetyfor ones self spectator other fliers property modeling itselfis entirely own minds per ception No perfect may what absolutely correct times own codes keep working bene fit correction little abbera tion ourselves become aware fly day day out weeks months years two years now writer has able watch observe put own house order Yet have serious gripes am far upset about harmless practices potentially dangerous ali monster airplanes exist Consider flight st rip strip care fully laid out distanced pits people airplane supposed take off land must expect touch-and-goes flight strip no place aerobatics fast low fly-bys Yet see accept four five airplanes time milling about overhead rolling looping inverting doing wing-overs stall turnswith cross-grain traffic occasional midair Overhead no horizontal references may know exactly pits anything else particular moment People love pour coal pull up abruptly mid-strip straight-up climb wing-over stall turn just watched Quarter Scale under test hot pilot thiswith ex tremely low top maneuver turning toward pits lining up down path No including club safety officers raised eyebrow Overhead especially right over strip good stiff necks Recently two men ships air left other pilot man dedicated safety helping beginners ramrod type Yet screaming Half-A passed back forth front meon pass no 15 ft away 10 ft up strayed near edge strip son Pattern pilot arm shoulder drag down kept yelling intel ligence ear pilot no aware ness himself Clearly did consider dangerous innocent i/oA Pylon job say half-second head must cram ourselves over flight-strip airspace piloting comfort accuracy aerobat ics best done 45 degrees elevation yourself puts plane well off end strip greatly reduces chance mishap Fly-bys passes should done beyond far side strip much possibility equipment structural fallure pilot error Continued page 120 78 Model Aviation K AIR EDUCATION & RECREATION ORGAN ISAT ION Presents Series 20 FLOWN POSTAL COMMEMORATIVE 11DAYCOVERS high quality individually designed covers will commemorate aviation achievements Golden Era flying between two World Wars recent times Covers now available follows N0] 50th Anniversary Amy Johnsons solo flight Australia 1930 N02 50th Anniversary Swissair Air Education Recreation OrganisationAERO voluntary organisation purpose promote development educational recreational activity schools colleges through medium aviation $250 US order covers send quivalent currency amount price includes postage packing Mr Harry Tripp Moor Grange High School Parkstone Avenue Leeds LS 16 6EW Yorkshire England Fun/Winter Continued page 78 involved flying low over strip front pilot line Third-order harmonics increasingly being found accident cause first learned through Bill Hershbergers experiments prevailed upon AMA publish useful table some time back am expert dont find ex perts telling us simplc stuff truly should know about should know transmit ters should within 12 ft bctter 15 ft wave-length other ficld row small pine bushes along pilot line pilots select spots tween two bushes crucial distance maintained take two frequencies beside own multiply frequency two subtract second frequency total often find two other guys set up third-order harmonic fre quency gets receiver taxi close front combinations Try calculator walked Don Srulls Spitfire out run way along taxi strip off end pilot line servos went berserkand highly selective receiver two offend ing guys happen get chummy flying antennas close together tified effect can prang landing taking-off airplaneand well down strip Put right together can hit new narrowband receiver surprisingly well up air fly stunt over strip gauche Hot passes hunger other things consider province An important letter came column Louis Guerrieri large model pilot attorney has carried us skilled impressive discussion arranged Executive Director John Worth Lous letter published AMA News section December 1982 issue rather column urge study first time someone has lent useful perspective safety question legal point view boils down fact activity necessarily involves possi bility accidents key considera tion models flown routinely safe manner Routinely active word Finally recent issue High Flight IMAA magazine excellent twopage diagram safe field layout seen through eyes big-plane fliers IMAAs map illustrates some points writer making especially concerning staying away flying strip except take off land field has enough space take precautions field layout procedures also way fly Safety depends youno else Yet us stew about monsters really should looking ourselves us everyday flying habits Bill Winter 4426 Altura Ct Fairfax VA 22030 Safety Preston Continued page 14 never never use old-style flexible nylon props anything spreading mustard hot dogs have seen training props virtually explode midair throwing lethal dag gers direction 1 20 Model Aviation N
Edition: Model Aviation - 1983/01
Page Numbers: 16, 17, 18, 20, 78, 120
SOMEDAY Quarter Scale Vagabond may make happy right now kingsized pain keep adding little things like Mount Everest project towers un changing Until cover things still wrong side power curve plain Jane Vagabond hides com plex personality have letters piles photos active modelers also own real thing No two alike Wait Mooney asks mutual flying friend Bill coming Vagabond Jim Jenkins also fine modeler 1981 EAA Grand Champion virtue immaculate Vagabond restored wreck some guy flew through fence trees flipped over What does take top others monstrous EAA Annual Fly-In Oshkosh clue Jenkins used 25 coats Lockhaven yellow individually sanded out further ado Jim Jenkins came across clip -scale Piper Vagabond interests like would nt belleve am restoring antique classic full-scale aircraft presently own three Vaga bonds 1940 Fairchild 24W 1950 Piper Tn-Pacer havent heard hasnt Experimental Aircraft Associ ation PA-17 Vagabond won Grand Championship last year. plans -scale Vagabond yet would very interested set want start 1/4 Vag fall next spring need info Vags am really have restored six date have own doa PA-15 Vintage Airplane October 1981 discover age 27 Jim 15 years younger restoration Airframe Rating working Power Plant Rating learned art under tutelage Jim Sr assisted restoration earlier Vag Pop A&P Al rating quite right about angular Vag abond Jim later told us people notice negative incidence horizontal stab four degrees really see side view line up bottom wing stab flight have found have trim little down elevator level flight cruise normal loads believe creates lot drag have told shortcoupled aircraft have incidence Author would have tackled Vag myself experience similarly setup mimic Airknocker model done FM 1963 balances 20% max rear chord has severe negative staband requires ample downthrust well know Vags prohibited spins because say flat-spinners Jim goes have spun Vags full nose tanks forward CG al ways pop out dime also correct wing washout tips degrees both tips keeps stubby wings flying outboard longer butt end also has 25 degrees dihedral front wing hinge fitting cabin draw string wing tip wing tip measure up 25 top front fitting engine canted down 25 degrees Author missed theorized 2-deg downthrust needed fortunately sloped firewall think need llttle Jim dad avid MA readers Jim flying 1/3-scale Druine Turbulent 21 lb Quadra bit heavy thinks scale llke flight asks about smaller Kioritz Vag model will build have OS 90 expect weigh close 20 lb hope avoid adding power will scale llke flight should fly wing 90 may weigh enough CG problem bigger engine would fine would make crate fully aerobatic know 28-lb Aristocrat flies beauti fully Tartan 132 co ever acrobatic Tartan would stand Vag its ear Quadra et al would perfect build 95% scale have very good 16 Model Aviation U lust fun Bill Winter Below Left 1/3-scale Quadra-powered Druine Turbulent Tennessee Red Daytona White built three months Jim Jenkins Dummy cylinders have added since picture taken Jenkins EAA Grand Champion 1981 fulIsize restored Vagabond re stores fullscale planes builds RC Scale jobs like mad see text Below Right PA-17 Vagabond took top EAA honors rebuilt 1979-80 wreck colored Lockhaven Yellow metallic blue trim Bottom Left During 1980-81 restored Continental A65-powered PA-17 Piper Castallian Red Daytona White Bottom Right 1969when Jim 15 years oldhe restored PA-iS first rebuild Bahama Blue Daytona White Lycoming 65-hp lob has won about 40 awards Hes real craftsman 1ALRO AIRFOIL 5PAR 62 t4 luck Jim tells us Able fly scratch-built 7-ft SR-8 Stmson Reliant 1940 Fairchild 24W scaled full-scale bird 6-ft span 54-in Beech Staggerwing good flier Enya 45 building fullscale Gee Bee E 110-hp Warner beautiful flying aircraft observes maybe Granvilles should have stuck early-model sportsters Info CAA certification flight reports original CAA/FAA microfilm data Jim would come shop Vag would fly week Traveling music fly lot see self-designed aircraft off-the-beaten-track guys efforts range Ill try thing long different mundane looking stuff involve hidden aerodynamic trickery flying site boasts few independent souls requires no calculator realize experimenters nationally run thousands clever lot stuff never gets published What might tell us hairy-dog story begins picture tyically ordinary looking crate much loved its creator Don Miller member Tn-Valley RC Club Minneapolis Since thing always leads another ended up fat folder letters pictures draw ings Dons cratesplus hints tips galore seems Don sent picture few words because photographer suggested ithes chap have apparently met Howard Evanson better known Crash will 70 years old fall Don announces have picture dad took 1917 airplane quite simple non-flying recognizable have building model planes ever since 1917 World War 1 year ot Bloody April Richthofen Red Baron zenith career time competed 1931 4th Annual Nationals Airplane Model League America Wright Field now Wright-Patterson placed ninth Mul vihill received honorable mention Outdoor Fuselage event saw first gasoline-powered modeL Au thor Thats early Bassett era Brown Junior could get fly sure excited professional engineer Don goes reflected model building Some fellows like build others design others just like fly enjoy designing 1948 1978 1 worked full-sized airplanes equipment space vehicles mostly Mer cury Apollo retired 1978 got RC both feet January 198317 Don Miller story text some originals photo above 3-view four cycle 40-powered monoplane flies like dream Don retired aerospace engineer stuff sound dollarmore sound perhaps Bill Barnes look-alike far right changeable wheels spon sons water flying 20 minutes Power K&B 60 Perry pump reverse gull wing lob near right 1948-vintage Free Flight has 8-ft span Hornet engine powerhasnt flown 40 years Bud Chappell re-lives history Martin 130 China Clipper mid-30s Spanning 74 weighing 8A lb its magnificent flier four OS 10sa commonsense way go like fourengine stuff Other good prototype possibilities include B-17 Liberator Connie Lancaster Buds beautiful flying boat has passengers crew curtains instrumentsplus famous dog Fala perhaps Don came up idea made pos sible DC-3s R4Ds Admiral Byrd took expedition Antarctic about 1947 10 15 take off carrier fly over Antarctic back baseall snow skis assume slotted wheels because retracted against bottoms nacelles Don would have gone Byrd except ad miral could have paid himand wife child Mercury program working Honeywell Don solved intricate gyro prob lem aspect reaction jets control vehicle attitude either off no proportional having make break electrical signals different rates ro tation operate 90 minutes enough go-aroundif capsule lost compression Apollo worked Astronaut Ed White design hand control vehicle attitude could controlled allowed vehicle rotate desired atti tude space sextant could used calculate departures course orient 50000-lb rocket thrust make corrections slow dosvn lunar orbit accelerate escape Don also designed strain gauges go control sticks rudder pedals first supersonic airplanes fast large air craft surfaces cannot operated directly pilot Actually strain gauges send voltage proportional load applied computer sends electrical hydraulic signals surfaces Don doesnt know work today liut designed first ones Hell surprised always talk about modelers contributions science flight whatever form takes design airplane fellows say nice words Don continues fix something around house sife says Good jobyou just saved us $50 gives good feeling think have accomplished something like little boy pulling wagon down sidewalk Some fel low admired wagon said Hey kid did get wagon boy said dad made out own head has enough wood left over make another will glad share some details handiwork other guys Dons ordinary-looking OS 40 4-cycle job uses thick airfoil Gottingen 387 bit over 15% thick root chord 12-5/8 Now Gottingen 387 would probably mean much states present-day designers full-scale airplanes used such airplanes Ford Tnmotor Lockheed Vega Fokker back 920s Fokker assume refers Trimotors et aL know models fly very low Reynolds Numbers old airplanes flew much lower Reynolds Numbers present ones think old airfoils better job present-day models present airfoils fly close Mach thick airfoils also give us much higher strength-to-weight ratios go airplane size high S-to-W ratio well high ratio high speed landing speed tip rib Clark Y chord 7 wing tips span 83 Which gives us aspect ratio 8/2 results relatively small tip loss better lift drag ratio tests Author Reference early wind-tunnel tests Gottingen 387 made 36 6-in wing six-to-one aspect ratio speed 40 mph Author directly applicable present RC models terms Reynolds Number Characteristics close Clark Y lift higher drag lot Don got us thinking about parallel-edged wings tapering thickness root tip Fokker D-VII regarded such threat Germans required destroy D-Vlls after Armisticeal though Tony Fokker smuggled train load components Holland D-VlIs cropped up 1930s such wings So phoned guru Ned Kragness has flown over 360 types NW stuff jets has owned early classics After taking wind out sailsyou get weird aerodynamics under sur face wing paramount importance lie expounded tapered wing twist what-not know importance washout twist RC wings avoid tip stalls bashed approaches Without twist tip ac tually operating higher angle attack rootdue among other things tip losses vortices etc Thus seems likely some twist merely gets tip fly same angle attack root tapered wing condition pro nounced seems likely again may need washout commonly assumed Neds interesting observations con cerned Ryan STA owned loves Vultee Vibrators Robins being wire-braced allowed him remove wash out gained 10 mphbut scared devil out myself As Chubby Checkers used sing maybe should Twist meet do-it-your self designers like Don Miller ask him about Continued page 20 IiHg SF01 LArn2ING 1EADY YET FoR ANE LAUNCIlf P b4E TV3 AJi lllrF JOIEW IAANPEP Ma CIGAIZ nO%l1EAPOF Goal ito WI AT P DO II WIlE YA NS & Regular mailings priceless Rembrandts like two past soften-em-up propaganda nefarious group Sailpianers Texas led Don Chancey McCoy-Hatfield-type fund Arkansas silent fliers led Ron Stanfield 01 Bill honorary member Arkansas group reports dastardly quip Alamo back door would no Texas Ping-Pong balls 40 paces 18 Model Aviation PULL ITLL TOGETHER KWI K-TWIST Form tightTOOL clean guy wires seconds Uses wire diameters up 032 TzjI $895 ea Cat No 301 MINI-MUFF-L-AIRE II What appears exhaust stackes really mufflers Super clean super simple MINI- fits engines 09 25 Cat No 236$695 THE FINAL FILTER KWIK-SWITCH MOUNT Set enables install battery switch anywhere fuselage drilling 3/16 hole Attractive mounts up 3/8 thick wall Cat No 203 $L75 480 Bonner Road tSr MO Wauconda Illinois 60084 USA ultimate in-line fuel filter twice much fuel filtering capacity others available Cat No 162 $175 URETHANE TUBING Will harden swell gas oil diesel fuels 24 lenghts Med Dia Cat No 208 $1 OOPkg DU BRO Large Dia Cat No PRODUCTS INC $120 Pkg crate Youll entertained probably enlightened Texas Winch Murders may hear much up about traditional rivalry Arkansas-Texas football games Writes old friend H Thomas Little Rock Well budding rivalry between Sail plane club honorary member Author Razorback Northern Virginia Texas bunch led Don Chancey breezed up last fall cleaned up annual meet meet again month better prepared few guys razor-sharp Don has ridiculing leader Ron Stanfield barrage cute warnings done two colors beautifully drawn FAST means First Arkansas Soaring Teamour club name Two recent Texas meets totals 12 10 contestants including two boys over 20 last year expect about 30 year Texas cattle drivers address loved leader Ron Stanfield Half-FAST Leader Group Captain Ron Stanfleld GC DFC B VD Mr CD After viewing accompanying illustrated ransom notes ol Bill tcmpted cut gear off Vaga bond RC-Assist attach tow hook replace K&B 19 lump lead audacity China Clipper Since days great sail ing ships words China Clipper evoke spirit adventure already flying Gas models four-engine Martin fly ing boats Pan American forged 1930s island-hopping link New World ancient Orient Until logisti cal demands WW II proved land planes could conquer great oceans due new air bases assumed future lay flying boats follow-on Boeing 307s paled beside behemoths envisioned postwar 40s Bud Chappell perceives inspirational China Clipper viable alternate having build monster aircraft satisfy ego part of us let him tell have avid modeler since 1934 glory days China Clipper en joy flying building RC Scale models Bud tells us RC experience began escapements tube-type receivers find thought model weighing 20 lb flown public terrifying totally unnecessary order enjoy complicated model aircraft example latest plane 74-in Martin M-30 China Clipper own design powered four 05 10 engines has gross weight 81/2 lb flies beautifully realistically wit nessed May 22 Brimfield MA Hydro Fly-In complicated multi-engine model profile nor stripped-down way cabin complete cur tained windows seven passengers very famous dog has complete cockpit captain copilot seats instruments etc description intended exercise self-praise Bud makes clear Rather offered proof model ers imagination expertise can scaled fit given set regulations submit have fun showing flying ffiodel size would have weighed six times much span Continued page 78 20 Model Aviation 1/4 SCALW= Nicide Plated St. -/1~ /7JWV~ V rDiscriminate Scale Fliers Dentand Dave Platt Im perfectionist kits prove reputation finest models RC scale has founded upon careful attention detail period over twenty years fact Im particular about kits theyre available personally make kit sign hold myself responsible reproductions genuine Dave Plait kit guarantee true outline combined force arrangement flies properly THE ULTIMATE legendary beauty efficiency Spitfire 1/5 scale Accurate last subtle curve Magnificient indeed lust sitting simply awe inspiring flight Powered 90 120 glo engine bra Maximizer ultimate Spitfire II provide intense experience sophisticated R/C -Span 88 Length 76 Weight 15-20 lbs $ 4F modeler Bucker Jungmeister regular direct drive engines 60 90 65 span 1/4 scale ace aerobalic hiplane time Still fits car $139 4 Ze0ierctJnitt bold flies great staying easily transportable 1/5 scale 79 span over 1000 sq ins 90 engines New 1/4 Scale Ptlot Supplied unpaint-A Also$139 ed comes in-vallabig 1/5 1/6 scale WorldRetracting struction booklet $30War II Fighter Pilots full br S25heavier ships figureComplete system 5139 HOW TO ORDERDirect Irom manulacturer no markup Write call. accept check money order Master Charge Visa cards pay UPS anywhere USA IFlorida residenis add 4% sales tax Yes accept lorvian orders pay Ireighi niormation model send sell addressed envelope nave Dlatt ivuodels inc 6940 NW 15th Street Plantation Florida 33313r Phone 305 587-4861 No ojfiiorvd oh ooy o5 oorpaoi Looking Hard Find Soarinq Goodies S7A c3a4fane 7 lory ac o has complete comprehensive line RIO Soaring products everexist North America LI Our line products includes some respected firms Europe well complete inventory own US manufacturers U We carry complete line Kits Hardware Accessories & Building Supplies have full inventory Launching Equipment & Related Products O We serve serious fl/C soaring enthusiast supplies kits other items have sought long Send $300 fully illustrated catalog Sailplane Factory PO Box 341 Red Lion PA 1 7356 717 244 4508 9am 9pm EST Fun/Winter Continued page 20 30 ft would become liabilityor put another way work worry pleasure Safety know about dont have safety rules AMA preaches safety practices clubs safety-conscious yet fear violations could cost us dearly Procedures fineup point get right down true safety private matter between mind character pilot machine obeys bid ding advance throttle assuming else has done best con scientious ability safetyfor ones self spectator other fliers property modeling itselfis entirely own minds per ception No perfect may what absolutely correct times own codes keep working bene fit correction little abbera tion ourselves become aware fly day day out weeks months years two years now writer has able watch observe put own house order Yet have serious gripes am far upset about harmless practices potentially dangerous ali monster airplanes exist Consider flight st rip strip care fully laid out distanced pits people airplane supposed take off land must expect touch-and-goes flight strip no place aerobatics fast low fly-bys Yet see accept four five airplanes time milling about overhead rolling looping inverting doing wing-overs stall turnswith cross-grain traffic occasional midair Overhead no horizontal references may know exactly pits anything else particular moment People love pour coal pull up abruptly mid-strip straight-up climb wing-over stall turn just watched Quarter Scale under test hot pilot thiswith ex tremely low top maneuver turning toward pits lining up down path No including club safety officers raised eyebrow Overhead especially right over strip good stiff necks Recently two men ships air left other pilot man dedicated safety helping beginners ramrod type Yet screaming Half-A passed back forth front meon pass no 15 ft away 10 ft up strayed near edge strip son Pattern pilot arm shoulder drag down kept yelling intel ligence ear pilot no aware ness himself Clearly did consider dangerous innocent i/oA Pylon job say half-second head must cram ourselves over flight-strip airspace piloting comfort accuracy aerobat ics best done 45 degrees elevation yourself puts plane well off end strip greatly reduces chance mishap Fly-bys passes should done beyond far side strip much possibility equipment structural fallure pilot error Continued page 120 78 Model Aviation K AIR EDUCATION & RECREATION ORGAN ISAT ION Presents Series 20 FLOWN POSTAL COMMEMORATIVE 11DAYCOVERS high quality individually designed covers will commemorate aviation achievements Golden Era flying between two World Wars recent times Covers now available follows N0] 50th Anniversary Amy Johnsons solo flight Australia 1930 N02 50th Anniversary Swissair Air Education Recreation OrganisationAERO voluntary organisation purpose promote development educational recreational activity schools colleges through medium aviation $250 US order covers send quivalent currency amount price includes postage packing Mr Harry Tripp Moor Grange High School Parkstone Avenue Leeds LS 16 6EW Yorkshire England Fun/Winter Continued page 78 involved flying low over strip front pilot line Third-order harmonics increasingly being found accident cause first learned through Bill Hershbergers experiments prevailed upon AMA publish useful table some time back am expert dont find ex perts telling us simplc stuff truly should know about should know transmit ters should within 12 ft bctter 15 ft wave-length other ficld row small pine bushes along pilot line pilots select spots tween two bushes crucial distance maintained take two frequencies beside own multiply frequency two subtract second frequency total often find two other guys set up third-order harmonic fre quency gets receiver taxi close front combinations Try calculator walked Don Srulls Spitfire out run way along taxi strip off end pilot line servos went berserkand highly selective receiver two offend ing guys happen get chummy flying antennas close together tified effect can prang landing taking-off airplaneand well down strip Put right together can hit new narrowband receiver surprisingly well up air fly stunt over strip gauche Hot passes hunger other things consider province An important letter came column Louis Guerrieri large model pilot attorney has carried us skilled impressive discussion arranged Executive Director John Worth Lous letter published AMA News section December 1982 issue rather column urge study first time someone has lent useful perspective safety question legal point view boils down fact activity necessarily involves possi bility accidents key considera tion models flown routinely safe manner Routinely active word Finally recent issue High Flight IMAA magazine excellent twopage diagram safe field layout seen through eyes big-plane fliers IMAAs map illustrates some points writer making especially concerning staying away flying strip except take off land field has enough space take precautions field layout procedures also way fly Safety depends youno else Yet us stew about monsters really should looking ourselves us everyday flying habits Bill Winter 4426 Altura Ct Fairfax VA 22030 Safety Preston Continued page 14 never never use old-style flexible nylon props anything spreading mustard hot dogs have seen training props virtually explode midair throwing lethal dag gers direction 1 20 Model Aviation N
Edition: Model Aviation - 1983/01
Page Numbers: 16, 17, 18, 20, 78, 120
SOMEDAY Quarter Scale Vagabond may make happy right now kingsized pain keep adding little things like Mount Everest project towers un changing Until cover things still wrong side power curve plain Jane Vagabond hides com plex personality have letters piles photos active modelers also own real thing No two alike Wait Mooney asks mutual flying friend Bill coming Vagabond Jim Jenkins also fine modeler 1981 EAA Grand Champion virtue immaculate Vagabond restored wreck some guy flew through fence trees flipped over What does take top others monstrous EAA Annual Fly-In Oshkosh clue Jenkins used 25 coats Lockhaven yellow individually sanded out further ado Jim Jenkins came across clip -scale Piper Vagabond interests like would nt belleve am restoring antique classic full-scale aircraft presently own three Vaga bonds 1940 Fairchild 24W 1950 Piper Tn-Pacer havent heard hasnt Experimental Aircraft Associ ation PA-17 Vagabond won Grand Championship last year. plans -scale Vagabond yet would very interested set want start 1/4 Vag fall next spring need info Vags am really have restored six date have own doa PA-15 Vintage Airplane October 1981 discover age 27 Jim 15 years younger restoration Airframe Rating working Power Plant Rating learned art under tutelage Jim Sr assisted restoration earlier Vag Pop A&P Al rating quite right about angular Vag abond Jim later told us people notice negative incidence horizontal stab four degrees really see side view line up bottom wing stab flight have found have trim little down elevator level flight cruise normal loads believe creates lot drag have told shortcoupled aircraft have incidence Author would have tackled Vag myself experience similarly setup mimic Airknocker model done FM 1963 balances 20% max rear chord has severe negative staband requires ample downthrust well know Vags prohibited spins because say flat-spinners Jim goes have spun Vags full nose tanks forward CG al ways pop out dime also correct wing washout tips degrees both tips keeps stubby wings flying outboard longer butt end also has 25 degrees dihedral front wing hinge fitting cabin draw string wing tip wing tip measure up 25 top front fitting engine canted down 25 degrees Author missed theorized 2-deg downthrust needed fortunately sloped firewall think need llttle Jim dad avid MA readers Jim flying 1/3-scale Druine Turbulent 21 lb Quadra bit heavy thinks scale llke flight asks about smaller Kioritz Vag model will build have OS 90 expect weigh close 20 lb hope avoid adding power will scale llke flight should fly wing 90 may weigh enough CG problem bigger engine would fine would make crate fully aerobatic know 28-lb Aristocrat flies beauti fully Tartan 132 co ever acrobatic Tartan would stand Vag its ear Quadra et al would perfect build 95% scale have very good 16 Model Aviation U lust fun Bill Winter Below Left 1/3-scale Quadra-powered Druine Turbulent Tennessee Red Daytona White built three months Jim Jenkins Dummy cylinders have added since picture taken Jenkins EAA Grand Champion 1981 fulIsize restored Vagabond re stores fullscale planes builds RC Scale jobs like mad see text Below Right PA-17 Vagabond took top EAA honors rebuilt 1979-80 wreck colored Lockhaven Yellow metallic blue trim Bottom Left During 1980-81 restored Continental A65-powered PA-17 Piper Castallian Red Daytona White Bottom Right 1969when Jim 15 years oldhe restored PA-iS first rebuild Bahama Blue Daytona White Lycoming 65-hp lob has won about 40 awards Hes real craftsman 1ALRO AIRFOIL 5PAR 62 t4 luck Jim tells us Able fly scratch-built 7-ft SR-8 Stmson Reliant 1940 Fairchild 24W scaled full-scale bird 6-ft span 54-in Beech Staggerwing good flier Enya 45 building fullscale Gee Bee E 110-hp Warner beautiful flying aircraft observes maybe Granvilles should have stuck early-model sportsters Info CAA certification flight reports original CAA/FAA microfilm data Jim would come shop Vag would fly week Traveling music fly lot see self-designed aircraft off-the-beaten-track guys efforts range Ill try thing long different mundane looking stuff involve hidden aerodynamic trickery flying site boasts few independent souls requires no calculator realize experimenters nationally run thousands clever lot stuff never gets published What might tell us hairy-dog story begins picture tyically ordinary looking crate much loved its creator Don Miller member Tn-Valley RC Club Minneapolis Since thing always leads another ended up fat folder letters pictures draw ings Dons cratesplus hints tips galore seems Don sent picture few words because photographer suggested ithes chap have apparently met Howard Evanson better known Crash will 70 years old fall Don announces have picture dad took 1917 airplane quite simple non-flying recognizable have building model planes ever since 1917 World War 1 year ot Bloody April Richthofen Red Baron zenith career time competed 1931 4th Annual Nationals Airplane Model League America Wright Field now Wright-Patterson placed ninth Mul vihill received honorable mention Outdoor Fuselage event saw first gasoline-powered modeL Au thor Thats early Bassett era Brown Junior could get fly sure excited professional engineer Don goes reflected model building Some fellows like build others design others just like fly enjoy designing 1948 1978 1 worked full-sized airplanes equipment space vehicles mostly Mer cury Apollo retired 1978 got RC both feet January 198317 Don Miller story text some originals photo above 3-view four cycle 40-powered monoplane flies like dream Don retired aerospace engineer stuff sound dollarmore sound perhaps Bill Barnes look-alike far right changeable wheels spon sons water flying 20 minutes Power K&B 60 Perry pump reverse gull wing lob near right 1948-vintage Free Flight has 8-ft span Hornet engine powerhasnt flown 40 years Bud Chappell re-lives history Martin 130 China Clipper mid-30s Spanning 74 weighing 8A lb its magnificent flier four OS 10sa commonsense way go like fourengine stuff Other good prototype possibilities include B-17 Liberator Connie Lancaster Buds beautiful flying boat has passengers crew curtains instrumentsplus famous dog Fala perhaps Don came up idea made pos sible DC-3s R4Ds Admiral Byrd took expedition Antarctic about 1947 10 15 take off carrier fly over Antarctic back baseall snow skis assume slotted wheels because retracted against bottoms nacelles Don would have gone Byrd except ad miral could have paid himand wife child Mercury program working Honeywell Don solved intricate gyro prob lem aspect reaction jets control vehicle attitude either off no proportional having make break electrical signals different rates ro tation operate 90 minutes enough go-aroundif capsule lost compression Apollo worked Astronaut Ed White design hand control vehicle attitude could controlled allowed vehicle rotate desired atti tude space sextant could used calculate departures course orient 50000-lb rocket thrust make corrections slow dosvn lunar orbit accelerate escape Don also designed strain gauges go control sticks rudder pedals first supersonic airplanes fast large air craft surfaces cannot operated directly pilot Actually strain gauges send voltage proportional load applied computer sends electrical hydraulic signals surfaces Don doesnt know work today liut designed first ones Hell surprised always talk about modelers contributions science flight whatever form takes design airplane fellows say nice words Don continues fix something around house sife says Good jobyou just saved us $50 gives good feeling think have accomplished something like little boy pulling wagon down sidewalk Some fel low admired wagon said Hey kid did get wagon boy said dad made out own head has enough wood left over make another will glad share some details handiwork other guys Dons ordinary-looking OS 40 4-cycle job uses thick airfoil Gottingen 387 bit over 15% thick root chord 12-5/8 Now Gottingen 387 would probably mean much states present-day designers full-scale airplanes used such airplanes Ford Tnmotor Lockheed Vega Fokker back 920s Fokker assume refers Trimotors et aL know models fly very low Reynolds Numbers old airplanes flew much lower Reynolds Numbers present ones think old airfoils better job present-day models present airfoils fly close Mach thick airfoils also give us much higher strength-to-weight ratios go airplane size high S-to-W ratio well high ratio high speed landing speed tip rib Clark Y chord 7 wing tips span 83 Which gives us aspect ratio 8/2 results relatively small tip loss better lift drag ratio tests Author Reference early wind-tunnel tests Gottingen 387 made 36 6-in wing six-to-one aspect ratio speed 40 mph Author directly applicable present RC models terms Reynolds Number Characteristics close Clark Y lift higher drag lot Don got us thinking about parallel-edged wings tapering thickness root tip Fokker D-VII regarded such threat Germans required destroy D-Vlls after Armisticeal though Tony Fokker smuggled train load components Holland D-VlIs cropped up 1930s such wings So phoned guru Ned Kragness has flown over 360 types NW stuff jets has owned early classics After taking wind out sailsyou get weird aerodynamics under sur face wing paramount importance lie expounded tapered wing twist what-not know importance washout twist RC wings avoid tip stalls bashed approaches Without twist tip ac tually operating higher angle attack rootdue among other things tip losses vortices etc Thus seems likely some twist merely gets tip fly same angle attack root tapered wing condition pro nounced seems likely again may need washout commonly assumed Neds interesting observations con cerned Ryan STA owned loves Vultee Vibrators Robins being wire-braced allowed him remove wash out gained 10 mphbut scared devil out myself As Chubby Checkers used sing maybe should Twist meet do-it-your self designers like Don Miller ask him about Continued page 20 IiHg SF01 LArn2ING 1EADY YET FoR ANE LAUNCIlf P b4E TV3 AJi lllrF JOIEW IAANPEP Ma CIGAIZ nO%l1EAPOF Goal ito WI AT P DO II WIlE YA NS & Regular mailings priceless Rembrandts like two past soften-em-up propaganda nefarious group Sailpianers Texas led Don Chancey McCoy-Hatfield-type fund Arkansas silent fliers led Ron Stanfield 01 Bill honorary member Arkansas group reports dastardly quip Alamo back door would no Texas Ping-Pong balls 40 paces 18 Model Aviation PULL ITLL TOGETHER KWI K-TWIST Form tightTOOL clean guy wires seconds Uses wire diameters up 032 TzjI $895 ea Cat No 301 MINI-MUFF-L-AIRE II What appears exhaust stackes really mufflers Super clean super simple MINI- fits engines 09 25 Cat No 236$695 THE FINAL FILTER KWIK-SWITCH MOUNT Set enables install battery switch anywhere fuselage drilling 3/16 hole Attractive mounts up 3/8 thick wall Cat No 203 $L75 480 Bonner Road tSr MO Wauconda Illinois 60084 USA ultimate in-line fuel filter twice much fuel filtering capacity others available Cat No 162 $175 URETHANE TUBING Will harden swell gas oil diesel fuels 24 lenghts Med Dia Cat No 208 $1 OOPkg DU BRO Large Dia Cat No PRODUCTS INC $120 Pkg crate Youll entertained probably enlightened Texas Winch Murders may hear much up about traditional rivalry Arkansas-Texas football games Writes old friend H Thomas Little Rock Well budding rivalry between Sail plane club honorary member Author Razorback Northern Virginia Texas bunch led Don Chancey breezed up last fall cleaned up annual meet meet again month better prepared few guys razor-sharp Don has ridiculing leader Ron Stanfield barrage cute warnings done two colors beautifully drawn FAST means First Arkansas Soaring Teamour club name Two recent Texas meets totals 12 10 contestants including two boys over 20 last year expect about 30 year Texas cattle drivers address loved leader Ron Stanfield Half-FAST Leader Group Captain Ron Stanfleld GC DFC B VD Mr CD After viewing accompanying illustrated ransom notes ol Bill tcmpted cut gear off Vaga bond RC-Assist attach tow hook replace K&B 19 lump lead audacity China Clipper Since days great sail ing ships words China Clipper evoke spirit adventure already flying Gas models four-engine Martin fly ing boats Pan American forged 1930s island-hopping link New World ancient Orient Until logisti cal demands WW II proved land planes could conquer great oceans due new air bases assumed future lay flying boats follow-on Boeing 307s paled beside behemoths envisioned postwar 40s Bud Chappell perceives inspirational China Clipper viable alternate having build monster aircraft satisfy ego part of us let him tell have avid modeler since 1934 glory days China Clipper en joy flying building RC Scale models Bud tells us RC experience began escapements tube-type receivers find thought model weighing 20 lb flown public terrifying totally unnecessary order enjoy complicated model aircraft example latest plane 74-in Martin M-30 China Clipper own design powered four 05 10 engines has gross weight 81/2 lb flies beautifully realistically wit nessed May 22 Brimfield MA Hydro Fly-In complicated multi-engine model profile nor stripped-down way cabin complete cur tained windows seven passengers very famous dog has complete cockpit captain copilot seats instruments etc description intended exercise self-praise Bud makes clear Rather offered proof model ers imagination expertise can scaled fit given set regulations submit have fun showing flying ffiodel size would have weighed six times much span Continued page 78 20 Model Aviation 1/4 SCALW= Nicide Plated St. -/1~ /7JWV~ V rDiscriminate Scale Fliers Dentand Dave Platt Im perfectionist kits prove reputation finest models RC scale has founded upon careful attention detail period over twenty years fact Im particular about kits theyre available personally make kit sign hold myself responsible reproductions genuine Dave Plait kit guarantee true outline combined force arrangement flies properly THE ULTIMATE legendary beauty efficiency Spitfire 1/5 scale Accurate last subtle curve Magnificient indeed lust sitting simply awe inspiring flight Powered 90 120 glo engine bra Maximizer ultimate Spitfire II provide intense experience sophisticated R/C -Span 88 Length 76 Weight 15-20 lbs $ 4F modeler Bucker Jungmeister regular direct drive engines 60 90 65 span 1/4 scale ace aerobalic hiplane time Still fits car $139 4 Ze0ierctJnitt bold flies great staying easily transportable 1/5 scale 79 span over 1000 sq ins 90 engines New 1/4 Scale Ptlot Supplied unpaint-A Also$139 ed comes in-vallabig 1/5 1/6 scale WorldRetracting struction booklet $30War II Fighter Pilots full br S25heavier ships figureComplete system 5139 HOW TO ORDERDirect Irom manulacturer no markup Write call. accept check money order Master Charge Visa cards pay UPS anywhere USA IFlorida residenis add 4% sales tax Yes accept lorvian orders pay Ireighi niormation model send sell addressed envelope nave Dlatt ivuodels inc 6940 NW 15th Street Plantation Florida 33313r Phone 305 587-4861 No ojfiiorvd oh ooy o5 oorpaoi Looking Hard Find Soarinq Goodies S7A c3a4fane 7 lory ac o has complete comprehensive line RIO Soaring products everexist North America LI Our line products includes some respected firms Europe well complete inventory own US manufacturers U We carry complete line Kits Hardware Accessories & Building Supplies have full inventory Launching Equipment & Related Products O We serve serious fl/C soaring enthusiast supplies kits other items have sought long Send $300 fully illustrated catalog Sailplane Factory PO Box 341 Red Lion PA 1 7356 717 244 4508 9am 9pm EST Fun/Winter Continued page 20 30 ft would become liabilityor put another way work worry pleasure Safety know about dont have safety rules AMA preaches safety practices clubs safety-conscious yet fear violations could cost us dearly Procedures fineup point get right down true safety private matter between mind character pilot machine obeys bid ding advance throttle assuming else has done best con scientious ability safetyfor ones self spectator other fliers property modeling itselfis entirely own minds per ception No perfect may what absolutely correct times own codes keep working bene fit correction little abbera tion ourselves become aware fly day day out weeks months years two years now writer has able watch observe put own house order Yet have serious gripes am far upset about harmless practices potentially dangerous ali monster airplanes exist Consider flight st rip strip care fully laid out distanced pits people airplane supposed take off land must expect touch-and-goes flight strip no place aerobatics fast low fly-bys Yet see accept four five airplanes time milling about overhead rolling looping inverting doing wing-overs stall turnswith cross-grain traffic occasional midair Overhead no horizontal references may know exactly pits anything else particular moment People love pour coal pull up abruptly mid-strip straight-up climb wing-over stall turn just watched Quarter Scale under test hot pilot thiswith ex tremely low top maneuver turning toward pits lining up down path No including club safety officers raised eyebrow Overhead especially right over strip good stiff necks Recently two men ships air left other pilot man dedicated safety helping beginners ramrod type Yet screaming Half-A passed back forth front meon pass no 15 ft away 10 ft up strayed near edge strip son Pattern pilot arm shoulder drag down kept yelling intel ligence ear pilot no aware ness himself Clearly did consider dangerous innocent i/oA Pylon job say half-second head must cram ourselves over flight-strip airspace piloting comfort accuracy aerobat ics best done 45 degrees elevation yourself puts plane well off end strip greatly reduces chance mishap Fly-bys passes should done beyond far side strip much possibility equipment structural fallure pilot error Continued page 120 78 Model Aviation K AIR EDUCATION & RECREATION ORGAN ISAT ION Presents Series 20 FLOWN POSTAL COMMEMORATIVE 11DAYCOVERS high quality individually designed covers will commemorate aviation achievements Golden Era flying between two World Wars recent times Covers now available follows N0] 50th Anniversary Amy Johnsons solo flight Australia 1930 N02 50th Anniversary Swissair Air Education Recreation OrganisationAERO voluntary organisation purpose promote development educational recreational activity schools colleges through medium aviation $250 US order covers send quivalent currency amount price includes postage packing Mr Harry Tripp Moor Grange High School Parkstone Avenue Leeds LS 16 6EW Yorkshire England Fun/Winter Continued page 78 involved flying low over strip front pilot line Third-order harmonics increasingly being found accident cause first learned through Bill Hershbergers experiments prevailed upon AMA publish useful table some time back am expert dont find ex perts telling us simplc stuff truly should know about should know transmit ters should within 12 ft bctter 15 ft wave-length other ficld row small pine bushes along pilot line pilots select spots tween two bushes crucial distance maintained take two frequencies beside own multiply frequency two subtract second frequency total often find two other guys set up third-order harmonic fre quency gets receiver taxi close front combinations Try calculator walked Don Srulls Spitfire out run way along taxi strip off end pilot line servos went berserkand highly selective receiver two offend ing guys happen get chummy flying antennas close together tified effect can prang landing taking-off airplaneand well down strip Put right together can hit new narrowband receiver surprisingly well up air fly stunt over strip gauche Hot passes hunger other things consider province An important letter came column Louis Guerrieri large model pilot attorney has carried us skilled impressive discussion arranged Executive Director John Worth Lous letter published AMA News section December 1982 issue rather column urge study first time someone has lent useful perspective safety question legal point view boils down fact activity necessarily involves possi bility accidents key considera tion models flown routinely safe manner Routinely active word Finally recent issue High Flight IMAA magazine excellent twopage diagram safe field layout seen through eyes big-plane fliers IMAAs map illustrates some points writer making especially concerning staying away flying strip except take off land field has enough space take precautions field layout procedures also way fly Safety depends youno else Yet us stew about monsters really should looking ourselves us everyday flying habits Bill Winter 4426 Altura Ct Fairfax VA 22030 Safety Preston Continued page 14 never never use old-style flexible nylon props anything spreading mustard hot dogs have seen training props virtually explode midair throwing lethal dag gers direction 1 20 Model Aviation N