7Bill Winter~ LI________ Plane TaIL THE AVERAGE AGE 105000-plus AMA members 39 two years higher 1978 last curious Before anyone goes flap am Chicken Little sky falling never told nine kids must eat spinach cause its good know average age modelers has rising over 50 years since began 1927 ModelAirplane News 1929 kids gen eration identified Lindythe romance daring World War aces glamour early barnstormers Standards Jennies heroic air mail pilots like Jack Knight landed emergency fires auto headlights saw American Boy its plans Twenties-style appeal 300000 members AMLA preceded AMA starry-eyed Nationals trip prizes Olympics grew up wave modeling progress always complicated expen sive age curve really rose RC rich mans hobby Consider dollar volume aeromodeling industry today roughly $500000000 average member 39 yet born time already bewailing lack kids Relatively few us know another world exists Through entirely different outlets barely notice millions ROGs gliders other things sell substantial market thats around half century am reassured letters young people So much asked computer breakdown membership discovered have 11000 group under 19 smart cookies believe manage well things older folks also enjoy know put words thoughts together just finished building TD Coupe reports Mike OBryan 16-year-old What ask TD Coupe dont ask Mike appeared long ago MAN thought niftiest gassie see print Old-Timer designed Theodore Dykzoelwhere TD comes fromin 1936 graceful Old-Tim ers two factors consider before building Old-Timer continues Mike First foremost must pretty cause dont like aint gonna build Second like design isnt done very often ship fits both criteria first humbling effort covering silk although doubt will last yard white polka dot silk hobby shop has sitting bottom box since Wright brothers flew Kitty Hawk Im sucker fun crazy color schemes see two photos TD Coupes the left being Mikes other dads twist Young Mike covered silk dad preferred MonoKote Pop used fiberglass cowl Mike made balsa split middle access Mike blew up plans original 630 sq 900 Mikes silky aimed 60 oz caine out 64 K&B 40 SAM Society Antique Mod elers competition loading mere 1024 oz/sq ft Pops iron-on ship hit 12 OS 60 four-stroke Mike asked Pop would quicker trim spraying hand-painting told should take too long mask off hand-paint took Mike month paint sand trim Mike jokes dads 12-oz-loaded job proverbial lead sled loading similar Kaydet Sr makes Mike wonder Senior can soared expect Kaydet Sr soar fairly low-aspect wing mind ramble little Mike asks have something get off chest issue Junior problem Granted AMA card says Im Senior think am qualified enough give point view other side fence Mike have undivided attention column always melts down some place age instant gratification Mike advises us have fast foods drivethrough tellers banks commercial jets travel faster speed sound can get halfway across world matter hours overnight mall one-hour film processing super glues set seconds frozen foods get picture Whenever show friends hobby first comment make dont have patience fact some think Im crazy because cant imagine spending time building have possibility its being wiped out matter seconds Something else modeling fraternity has nt considered type young people hobby tends attract Generally athletic types have free time wrapped up organized sports therefore non-athletic likely participate hobby generalization isnt always true because other minor RC club 300 both engaged sports during school year other diversions like home computers people have days TV has infiltrated 99% American homes people have writing articles concerning problem blame cost dont really think problem because generally kid wants something hell save money until has enough Usually son daughter shows genuine interest something parents will help back financially Obviously hobby doesnt need expensive much does take make Control Line matter simple chuck glider usually kid thinks model alrplanes conjures up images expensive RC type am fortunate enough have father involved can honestly say pay about 90% hobby expenses through lawn mowing jobs have summer kids out have patience willing learn May relate experience couple years ago During summer sometimes get bored pass time Ill make chuckie fly front house until lands roof time made proved better flier anticipated None gliders ever great performance would stay up about seven seconds before crashing ground So took littie brother two chuckies over local grade school got eft Sixteen-year-old Mike 0Bryan enlarged plans TD Coupe 1936 MAN tram 630 900 sq TorSAM competition K&B 40 silk covered brush trimmed has split balsa cowl Hes designing 9-ft Ryson K&B 19 some 25 Claude Ryans elegant power/soarer retirement joy Right dad MonoKoted TO dont guys have covering preferences reversed 05 60 four-stroke power Mikes 64-oz beauty hess 1024 az/sq ft wing loading dads 12 oz Mike jokesthat itisa proverbial lead-sled 18 Model Aviation about eight nine years old romping around immediately gathered around started flying Three got bored after 15 minutes went back roughhousing stayed totally fascinated taught him throw correctly spent next two three hours throwing little chuckie around schoolyard didnt lose interest wings broke off wait 20 minutes Testors Green Tube cement back never saw kid again mistake because responsibility follow up Au Reminds Delta Dart promotions What Im trying point out kids Out up us find name Chris Register live Stone Mountain GA writes another upbeat young guy sounds running president have model aviation enthusiast since eight years old Au Now did get started am now 18 engineering student De Vry Technical Institute Decatur see other modelers have sent photo graphs have shown short write up Au positive approach am sending some photos recent project Gold berg Sky Tiger powered HB 40 ample power Believe actually flew slang word vocabulary skulter through whole Turnaround pat tern glitch bit sloppy maybe couldnt get flat spin satisfactorily chopped six inches off wing Man watch out Now its hard keep out em really admire old-timers keeping sport alive people like Au think means uns like dont think model aviation will ever die Thats about dont want take up too much flying time own philosophizing point out young guys dont instantly lock onto thing youll note Chris Comet T-Craft rubbe- job picked up three years ago K-Mart $159 Flies great says Chris urse.. Kids us am 70 years old have enjoyed building flying models ever since put plans old Boys Lfr John Van Ryzin checks Au John could have American Boy Milwaukee Journal used publish plans rubber-powered models Au Both Scripps-Howard Junior Aviators Hearst Junior Birdmenpapers big modelingprograms Remember old Aframe twin pushers made winders old egg beaters Lots fun Carved own left- right-hand props Au did some fun got RC retired married children gave Sanwa two-channel Andrews H-Ray What leaming experience powered Enya 15 III Control Line engine thought because flew Waco biplanes Stinson Trimotors full-scale ones flying model radio control leadpipe cinch 65 hand-to-eye coordination greatest conquered Au full-scale pilots have terrible time AC say miss feedback get seated cockpit overcontrol left-right nightmare versatile pilot know scares daylights out himself bystanders Tele masterwhich willfree flight its own dont bother stick whomping cure get up about 300 feet accept soothing words understanding low-key instructor stupid enough say give left right up down blows mind too fly straight lines back forth low power until find faith machine yourself get left-right stuff overcontrolling out system flew Control Line Stunt Combat well took 52-ft cables anchored CG cabin installed cable guide end wing flew H-Ray off schoolyard parking lot like CCW Control Line used spare tire car unimpressive pic rubber-powered T-crafttickles Winterto no end Chris says Comet Taylorcraft picked up local K-Mart $159 Its great flier too second airplane Sterling Citabria Chris states old can build like loved plane skills refined enough back fly very well Yes bitthe dust Young old theres lesson there. someplace adapter located center wheel adapter 1-in pipe center 3-fthigh broom handle mast top ofthe mast eight-penny nail could loop Du-Bro line connector over center pivot used stones weight tire would slip high speed centrifugal force made hundreds takeoffs landings Heres baby says 18-year-old Chris Register Goldberg Sky Tiger powered HB 40 unreal performance finally learned sustained inverted flight Winter says Chris later chopped off 6 span could inverted spins Heres Chris 14 Pilot GB 40 built friend Surprised him flew great Winter says 14 didnt know what ROG took him 30 years try fly things like Chris bomb Left This Antic still flies great 05 60 four-stroke after six years Right Lufberrys Nieuport has authentic instruments French complete cockpit folding gun rigging perthe original Shown OS 60 four-stroke Williams Bros LeRhone miniature Now has 05 90 four-stroke bar-stock LeRhone dummywe suppose needed additional nose weight power Actual size stated Let Scratch-built Aviantiker 0-3 part Antic part Aviatic part Rumpler Slow graceful OS 60 four-stroke Winter says Al should allow out night Right Dennyplane OS 40 four-stroke Takes off half-throttle cruises just above idle Au Evidently means Radio Control until gained enough courage let H-Ray go put small amounts fuel limit engine run no throttle control landing ending deadstick sure learns land way Happy day no crackups thought Id share idea anyone cannot get instructor help works fine ifyou have flown Control Line lot Any way can own first RC flight landed runway Walt Schroder hand-launched beast 7-ft 1947 RC Special rudder four-arm Good brothers escapement no throttle its Ohlsson 60 big stab hit Wait back head kept goingno Walts head talked out loud way landed huge argument over whether free-flighted piloted about loud bumping noise coming transmitter Walt couldnt hear itthough sounded like drum heart prepared flight Waits hold ing big ship aloft country kitchen calling maneuvers worked rudder innocent didnt know enough turn off escapement switch drove 60 miles next day find Ed Lorenz explained consequent mystery dead batteries too pilot never affected attempts fly RCone mans meat is.. Van Ryzin really wrote tell us about clever conversion Eaglet didnt know John Hunton did Screamin Eagle article August 1984 issue Model Aviation last T Ze Flying Circus Albert J Ward another ubiquitous Californian makes feel like blindfolded kid trying pin tail party donkey says model building led directly lifelong career never regretted moment it still fun Hes finished Sterling Ste arman powered OS 90 fourstroke spent three Navy years overhauling Stearmans Staggerwing Beechcrafts NAS Glenview weve few Nats hes added details can remember Spread beside display color photos wondrous variety intriguing ships say least reflect lifetime love affair character subjects hope get withjust few examples pleasureincluding Dennyplanewhich what will write about Due recent columns am flooded Dennyplanes said Midway kit fleet Telemasters spoilers carrying gliders go fly Sunday may encounter 25 Telemasters half spoil ers half gliders topand some both well flaps spoilersand perhaps 20 Model Aviation pictures page just part Al Wards Squadron Left OB 60 monster 0S 90 four-stroke provides air borne launch Marks Models Wanderer Spanning 82 has servo-operated hatch dropping whatever Above No3 Martin Handasyde version French Antoinette 9/48 scale spans 73 0S four-stroke shown now has Salto 45 four-stroke Lateral con trol provided bywing warping King postsand wires galore sprung wire-spoke wheels nose-over skid brasstank radiators pilot 10 Dennyplanes few zooted up ailerons less dihedral get picture Actually Ward gave 4-K kit friend summer vacation surprise friend presented Al ajewel fall framed ready go Al installed OS 40 four-stroker three-channel grossed 4 lb takeoff Gremlins tossed him series glitches resulting series sharp nose-up-and-down undulations high-G roller coaster wing snapped ird zig Kapow bears discussion first let Al tell paid much attention center section already framed up checked drawings built exactly plans entire frame glued Titebond Au think means OK Apparently wing plan shows wing Reginald Denny -even ers mi capal lion ir J wr igr designed strong enough added stresses weight RC flying recom mends future Dennyplane pushers beef up dihedral joints add webbing front spar least halfway out able salvage bird replacing beautiful engine cowl Au lovely cowl seems fascinate us aluminum panworks fine Denny flies just fine slow stable quick take off slow landing Takes off about half throttle cruises just above idle Au Thats fun-perfect tf under powered dont want ha twothirds throttle max takeoff OldTimer Should beef up Denny know will never break wing Old-Timer because fly gently through open loops wish snaps etc Id carry something extra out least one-third semi span across centerline lightly-built design balsa spars absolutely no penalty much insurance substituting same size spruce spars Id stab spar Id build Denny unmodified except Al has described concerns flat-bottom wings possibility radio malfunction would duplicate Als experience Broken wings common RCs early wi lere now eping c alre othy Ott sougn ked afteri nt ughnut shops d Doi rica Cai Banif everyw ould sc imore ing g agian say Hal all flat-bottomed phugoid pitching can fatal Guys would nose over dive pass vertical pull Out elevator killed Lincoln Beachey point exe cute vertical S try enter inverted half outside can flat-bottoms attain sustained inverted abort panic pull sharp split-S varying loads flat-bottom wing flown verge catastrophic youll need spruce sparsand webbing way out Doc Mathews keeps preaching Ive beenhackingbalsawoodsince 1932 am still trying get right comments too modestly Im retired United Airlines After 40 years full-size maintenance can now devote time smaller ones flies Bay area sites getting problem weather permits year-round flying first successful Free Flight inverted Gwinn Aero placed far down 1940 Nats Bantam-engined third-placer 1949 Plymouth Internats still alive sure does have time little ones including OS 40 four-stroke Flying Quaker Super Cyke Buzzard Bombshell Electric Play boy Viking Also Antic sorta-bipe Antic Top Flite J-3 Proctor Nieuport ye Continued page 22 October 1986 21 Sans spinner pic Winters new electric Heron 565 sq area has Robbe/Mabuichi motor cabin extension drive big Robbe folder Does 15 20 mm before dusk three trips max altitude six seven winch tow height Gear removes has yet flown way Has eight 1 2s 075 motor Draws 16 amps static though 28to 35 amps have reported others using com parable setups prop Schmitt pic 1-mm charge Ni-Cd booster Don Srull gets 2 mm FF Pietenpol powered tiny M RC FF electric motor two 100 mAh cells Williams plastic prop plane bigger outdoor CO-2 less fuss Field limits charge Schmit pic See anything different Gordon Stahls Gee Bee Bright red-and-wfllte scneme painted Used Aero Span Balsa USA Missing stab uses Evans/Simitar airfoil Get lust Plone emphasis product rather production Bob Godfrey Precision Built Models Kits creates custom planes very particular customers 1 / 3 scale Laser 200s built Tournament Champions evolved / 3 1 / 4 scale kits newest kit Phoenix 9 continues high standards Precision Built Models previously achieved Bob always striving improve Laser Kits Built Wings Laser Built Bones product building techniques both practical innovative Bob always willing give building engine advice anyone calls case repairs needed may purchase single wing fuse wood parts need Precision Built Models get just kit get service Bobs planes becoming popular planes fly 1/3 1/4 $ 35000$ 22900 6750037500 Laser CoveredBud Light Decals9500050000 Ready Fly eng & Radio Instal12000075000 Universal Receiver Battery Packing Sleeves Ties $250 Phoenix 9 complete kits $15995 Built up prices same 1 / 4 scale Laser Plans parts available Freight included Direct Sales Only P~c-Iskiin Haul Bob Godfrey/ 1818 6th Ave W Bradenton Florida 33505 813-747-7006 gods Martin-Handasyde like Antoinette Falcon 56 Headmaster 40 Q13 60 Monster Dennyplane Jr original Bantam FF Mini-Hogan FF rubber-powered Midwest Gol lywock Comet Sparky coupis Pea nuts .. Ken Willard dont box car column dreamed about Ken go back long way wed talk New York hotel room waited midnight Connie Sleeper LA Hes forgotten about air planes Ill ever know dont argue him seems Ken once published someones analysis claiming prove plane turning upwind downwind 180 will lose altitude Mine always did letters over world can believe own experience Id bet came textbook theorists no hands-on experience Note although plane turned into-thewind path downwind direction Ken did designate infamous killer downwind turn nor reference far fact plane trimmed cruise cruise poweror glider will loses altitude turning out wind will regain coming back wind assuming handsoff stable requires no interfering control inputs Ken told guys bug off like debate over angels can dance head pin paper chase went onand Ken almost lost cool July RCM lets leave Ken fascinating column hold.. want trombones hoary debate drips mossy tendrils definitive confrontation tween authorities took place Flying years ago Results Yer pays money takes yer cherce call basic syndrome Air Ocean pro air ocean theory postulate turning airplane part drifting air mass impervious outside inputs Usually airliner etc pictured 360 over say Pacific say 30000 ft youll never notice anything either aone ortwo needle-width turn heavy fast airplane since its airspeed relative wind encounters far cry model airspeed may compete wind half equal bad day alight moderately-powered plane its velocity plane really impervious its 360 true circle its 360 flight path has elongated downwind abbreviated upwind legs its related ground path naturally much distorted eye earthbound viewer may things wonder about tight 360 performed Cub 50 mph wind much comparable models making hands off 360 same wind Hands off means no control inputs used Entry requires gentlest inputso lets assume second 360 720 years pros said nothing about inertia kinetic energy cons claim factor Both sides argue whether changes direction influenced momentum cons say moving mass will tend continue its already-established direction argue results reduced airflow over wing downwind portion circle hence lowered airspeed consequent change angle attack leading nefarious down wind turn shenanigans ie downwind wind have caused full-scale plane well model fall out air Below will find that Ken shows Continued page 24 22 Model Aviation * Special Detergents help prevent varnish promote clean burning * Rust Preventatives protect expensive engines corrosion SIG CHAMPION 2-STROKE FUEL FREIGHT FREE SHIPPING ON ORDERS OVER $1500COLLECT PINTQUARTGALLON55 GAL DRUM 0% Nitromethane$315$450$1050$19000 5% Nitromethane$365$525$1250$25800 10% Nitromethane$415$550$1450$32500 15% Nitromethane$430$625$1650$38500 25% Nitromethane$495$750$2095$52000 35% Nitromethane$575$875$2495$66000 SIGPREMIUM4-STROKE FUEL 10% Nitromethane$415$550$1395$29500 15% Nitromethane$425$625$1595$35900 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending fuel finest quality ingredients available alcohol 995% pure very best grade available nitromethane use 100% pure get honest portion based % volume maximum lubrication get perfect 50/50 blend Bakers AA Castor Oil Klotz Techniplate Racing Oil protect expensive engines finest quaiity fuel can made price Dont take word try some judge yourself l See dealer first available order direct Call ri 800-247-5008 toll free orders Latest Catalog $300 ~LJ SIG MANUFACTURING CO Montezuma IA 50171 Prices sutitect chanee notice Hands Off Cut II Especially Designed Tapered Wings HANDS OFF CUT II unique device cutting high quality foam wing cores hands off also cuts both sides same time Most modelers will amazed high quality smooth surface will achieve using device plus added advantage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam components such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble s approximately 15 minutes Dealers Wanted Hands Off Cut II Hardware Pkgl $8750 plus $3 ship ft hand 24 Volt Variable Output Power Supply$5250 pius $3 ship ft hand //5 NORRAY PRODUCTS INC __________ 5008 Sandbeach Road Wichita Falls TX 76310 Tel 81716924475 VISA 11 oversimplification key question being whether kinetic energy momentum inertia whatever relative earth indicates air prefer go latter interpretation Aside saw good pilot bring big MAN Monocoupea fine modelover fence against strong wind slightly dip tip recover quickly nice go-round 360 entering approach again downwind fell like stone pilot Quarter Scale expert recovery 360 continued direction slightly dropped wing back over fence out good wind old approach path what considered enough added power flying Mono relative earth safe eye needed much power airspeed wider recovery pattern what appeared ade quate reader wonders about years old Kougar doing same thing excellent plane Another lost Stolph Starlet same way though crack flier asks have clues common denominator dreaded downwind turn opposing viewpoints will probably never reconciled Example two aero engineers high-time pilots expert model fliers pursued debate bitter end have files access finest scientific brains organizationsand mean biggies team least six organizations proved its case disproved others What think Ken just published thorough article math Thermalist newsletter Soaring Society East Tennessee sup posedly settles matter Kens words article proved yer takes yer cherce always kinetic energy relative ground key factor downwind furor Ken trotted out box car scrambled poor brain box car travels down track speed matching wind speed flies Indoor model constant 360s airspeed model 20mph Its speed inside box car traveling downwind 20mph flies against wind zero relative ground As circles downwind airspeed 40 mph 20mph relative moving car Ken asks Does model climb going against wind lose altitude downwind expected kinetic energy relative ground speed air nightmare true box car jerked instantaneous stop jerked instantly 20 mph again Didthe circling model remain center car dreams have meaning seeing circle Control Line lower wing tip center earth Since model banked turn its wing loading highertrue things fly tightlybanked Spitfire stalls 250 mph Still fog imagined model flying around pylon CL fashion being gravity Does matter box car goes Now half awake realize two things box car en capsulated box air model being Free Flight subject full range ac celeration/deceleration results RC control inputsthat pilot errors Does Kens model know upwind downwind within its moving encapsulated chunk still air sure dont know Note Ken does discount kinetic energy asks rather think relative ground air choice words suggests thinks relative air think him correctbut am Kinetic energy involves mass speed flying machine no kinetic energyno tenContinued page 26 24 Model Aviation ALL PURPOSE FOAM CU1TER POSI CURE CYANOACRYLATE SPECIAL INTRODUCTORY OFFER List Sale Savings 1 oz Fast Cure 3-5 Sec495$2450% Off 2 oz Fast Cure 3-5 Sec895$39656% Off 1 oz Gap-Filling 5 Sec495$249500/a Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied P051-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 2514789 SHIPPING Out State INFO 408 251-0787 Californiaper order Hour Mon-Wed Fr & Sat 930-530 FAST SERVICE 930-900 1200-500 COD ADD $190 dency remain motion maintain direction resist changes direction certainly would affect flight path plane could fly flying machine possesses no kin etic energy airspeed balloon zero wind stabilized fixed altitude Considerthis too An unintentional spin entry usually deadly snap differs inten tional spin entry plane slowed level flight stall occurs rudder jammed direction wanted spin accidental spin can entered out bottom over top Modelers say wing outside circle traveling faster therefore spin out bottom slower-moving wing quits Yet snaps over top training over-the-top entry executed maintaining slightly banked climbing turn top wing quits eventually Cub will roll over top entering spin right what left climbing turn suspect reason tad down aileron required maintained left climbing turn washin condition whereas slower lower wing its slight up aileron has washout course neutral ailerons present much normal flying would probably see over-the-top entry unless plane steeply banked high-speed turn time have seen model snap under such conditions over topsuch 09-pow ered little Scale foamie racked around too far downwind three-channel ship aileron position factor true downwind turn back wind pilot always yelled interference High-speed secondary stalls un known vast majority modelers Years ago Cdr Green invented stall warning indicator interviewed him Interavia fourlanguageeditionsSwiss aero journal partial stall Bonanza recovery horizon plenty power level flight reestablished ship feeling solid flew straight out good indicated airspeed after lapse seconds warning indicator intoned series tiny beeps plane stall region Obviously still power required Until side other gives up sin openminded comes air ocean genesis debate know models conformprobably because comparable condi tions necessary laboratory situation cannot created Hands now no flying moving aircraft carrier proof recently print Einsteins train inside Kens box car calm air Ive set up lightlyloaded low-powered craft perform 360s 720s hands off no changes altitude wind always lose altitude downwind side regain upwind flight circle tilted disk Proves nothing guess view Kens question whetherthat altitude loss due kinetic energy relative ground speed earthor air What see easily rubber good breeze wind strikes underside plane begins its hoped-for 360 low power high-pitch prop its climb poor nonexistent downwind leg prop slows down seems flail air airspeed obviously off though ground speed may great coming around wind plane will zoomespecially flat-bottom foil rpm picks up toowhich sometimes re sults stalls whip stalls Lift appears tremendously maguified point Continued page 128 26 Model Aviation ROUSH KITS TaylorCraft Full span 108 Area 1670 clipped 84 Area 1300 Power 75 12 Cu Oalaa&PIy 10-l2lbe $11996 Super Sport 120 Span 73 Area 960 Power 75 12 Cu Ifl $9996 Super Kwik Fli Span 70 Area 927 Power 75 12 Cu Ifl $8996 Two Ugly Stick Span 70 Area 1290 Power 75 12 Cu $9995 Jr Sticks Span 72 Area 1080 Power 75 12 Cu $7996 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1728 Dywood St SE Canton Ohio 44707 2144644610 THE LEADER IN COMPETITION PROPELLERS NEW 4 CYCLE SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHELATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 12 66A778 299 136778379 146778479 1567689 16678989 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 53/i34149 634149 72833A456179 83344568189 8/4566A7199 94566A77199 104566A7209 106W8W209 106EW219 114677778229 115W229 116EW239 11I67239 124W279 125W279 1256279 1356349 1456459 1556659 164AN969 16678969 RO PYLON RACING SERIES 500 DIAPITCHPRICE 7SN 5N279 8I67/7I8299 SERIES 400C 8/66777289 9777289 W WIDE BLADE EW EXTRA WIDE N NARROW cssI coazr tNDED Safety/Preston Continued page 16 Balsa knives Up point months column has offered advice us build internal-combustion engine-powered models As postscript comes safety message Scale Staffel newsletter should interest modelers came way Bill Winter author Just Fun column magazine Some five years ago reported incident also relayed via Bill concerned modeler bled death after cut himself leg balsa knife knives can hazardous Consider following tip Scale Staffel newsletter editor dont know name JP hobby knife quietly roll off work bench drop lap bury entire length blade right inner thigh bad news wound got infected very painful good news did land mere two inches left 25 cents could purchase cheapest surance life sketch accompanied Scale Staffel newsletter safety tip showed soft vinyl triangular-shaped sleeve handle knife Apparently can obtained sta tionary stores about 25 50 cents tended slipped onto pencils prevent rolling off tables desks etc claimed such sleeve does interfere use knife may actually help grip handle Have safe month John Preston Model Aviation 1810 Samuel Morse Drive Reston Virginia 22090 Plane Talk/Winter Continued page 26 fly rudder-only RC jobs know can lose downwind out sightunable penetrate after downwind turns down wind portion circle sideways drift lightweight ship revealed wind blowing against top plane Such changes display wind airspeed changing relative other points circle since wind relative wing changing angle attack kinetic energy involved know upon turning wind plane can slow abruptly some reason go climb Dealers Distributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC P 0 Box 2136 Fan-tax Vrgnia 32031 U 5 stall As varying airspeed 360 model find certaln three-channel RC models slow respond rudder downwind sideso much some like Rebel can barely brought back wind rudder action powerful Airspeed over rudder going downwind less no argument therefore less over entire plane including wing plane must accelerate downwind leg malntaln its original speed relative wind So its obvious eye wind time sorta blowing model along say Get out way two Gordon Light Rubber Commer cialsa sport version Wakefield winner flew beautifully gentle wind strong wind always spiraled ground downwind segment circle added dihedral problem vanished no way Rebel GL model could blissfully drifting air ocean Suppose wind As Gordon Light model banks front you see its top dihedral has the top wing see less see lower wing ridiculously large dihedral would see wind large expanse upper wing little nothing lower wing other extremethat no dihedral assuming model banked verticallyyoud see equal area both upper lowerbanked wing know model condition could roll out its own drifting downwind speed match force wind definitely impervious influence wind since blithely floating air ocean aerodynamic soul leave ponder resulting relative wind airfoil both wingsand conse quently whatever angle attack exists model pursues its circular path constantlychanging relative wind increments years experience Don Srull have learned question nothing says scientist par excellence experienced aero nautical engineer constantly-winning modeler varied events Anything I better innocent comments man thinks like model believe pro asr ocean says what see what top cites Hewitt Phillips NASA did definitive analysis would bible subject Hewitt genius knew Indoor days early Thirties cannot argue Phillips says Don proved what see can take place backside gust think what see lightweight turning out wind precisely Hewitts gust condition effect model has created its 128 Model Aviation ao 10SASIFLIIIIG 13S.AAJ AZRCA L16BdhJa LIA5cN uaWpan 8 Luah. poem 6O 90 cun wiagapan 8 1uca power 2 ou L2R FOoT PLAN S1SZOOOZL TGLASS CL3SZOoOlL add 10% hiv A0 PLLZIS N PANTS PO 3 939 ZAH 11 11760 1 716 727O Classic U/C Scale iII sGRATL~ 40 Wing 15 25 Engines 5 0 IL SOMETHING NEW & BETTER! THE uii CWfWVTPf4 SPORT/TRAINER SIMPLE TO BUILD EASY TO FLY TRAINER -ORBUILD IT WITH AILERONS AND DO IT ALL OR WITH 05 ELECTRIC MOTOR 48 SPAN SQ IN 43 OZ SELECTED DIE AND MACHINE CUT BALSA AND PLYWOOD COMPLETE ROLLED PLANS STEP-BY-STEP INSTRUCTIONS ALL HARDWARE AND FORMED GEAR FLY WITH 20 FOUR CYCLE ENGINE ASK YOUR DEALER own back gust world dare say turns chases wind Turning wind effect creating gust-like environment head Its kinetic energy has converted something What really downwind turn way As Ken says downwind upwind has killed hundreds people can kill model go round float force bit dont bring up power youd expect strong wind Before war newly-soloed pilots some commercial guys 250 hours flew lightplanes over homesteads girl friends houses strong wind Theyd bank nicely wind gradually keep forcing circle rudder order see house gal simultaneously trying flatten angle bank ailerons cross controls theyd spin terrible mysterious problem until Leighton Collins explained great little magazine Air Facts As beginner wrote couple humble pieces him son editor Flying believe Argue among yourselves Dont bother pros cons share Willards comment Hey fellows lets knock off Just lets say some will lose altitude some wont will go out limb planes drift downwind Half-empty half-full glasses thats air oceanfor models anyway Bill Winter 4432 Altura Ct Fairfax VA 22030 Radio Technique/Myers Continued page 39 simultaneously order get some protection guy turns checking other users channel same scheme simultaneous use two RC channels imple mented way two parallel independent operating systems can also protect us disastrous consequences simple failures like battery exhaustion having battery antenna wire break pretty common occur rences Calvin Orr Custom Electronics recently loaned prototype Error Switch Normally Calvin supports simultaneous use two different bands such 50MHz 72 MHz goal investigate simultaneous use two 72 MHz frequencies Calvin says simultaneous use two 72 MHz channels including Error Detector switch ing can performed today minor modifications presently-available equipment already done Airtronics AM equipment using modified buddy-box connec tion Stage 2 tests Error Switch loaned came equipped 19 Airtronics connectors cheap way todays prices can buy two complete systems simply add Error Switch modified buddy-box cable join complete Redundant Radio system outlay $500 About Error Switch airborne Error Switch $149 item comes two flavors AM FM prototype AM type Error Switch samples both receiver outputs shuts down whichever receiver suffering inter ference FM version has bit sophisti cated order take care FMs capture Continued page 132 NEW FOX 4CycIe Special MIRACLE GLOW PLUG totally new concept glow plug design Instead using idle bar MIRACLE PLUG built pre-cotubustion chanther important thing plug retains heat better other know Try . 4-cycle motor 2-cycle motor also will get smoother throttle reslonse lrolably will able use less exlensive low nitro fuel Tests also show reduced fuel consumption cases WARNING motor Irobably will idle faster reset throttle erwise might able land Hard believe . course check out MIRACLE PLUG Just case 40702 4-Cycle Glow Plug $275 Manufacturing Company 5305 Towson Avenue Fort Smith AR 72901 October 1986 129 I DAVEY EMS CORPORATION E WOOD LANE MALVERN PA 19355 215 644-6772 dant-channel usage should able use two RC channels
Edition: Model Aviation - 1986/10
Page Numbers: 18, 19, 20, 21, 22, 24, 26, 128, 129
7Bill Winter~ LI________ Plane TaIL THE AVERAGE AGE 105000-plus AMA members 39 two years higher 1978 last curious Before anyone goes flap am Chicken Little sky falling never told nine kids must eat spinach cause its good know average age modelers has rising over 50 years since began 1927 ModelAirplane News 1929 kids gen eration identified Lindythe romance daring World War aces glamour early barnstormers Standards Jennies heroic air mail pilots like Jack Knight landed emergency fires auto headlights saw American Boy its plans Twenties-style appeal 300000 members AMLA preceded AMA starry-eyed Nationals trip prizes Olympics grew up wave modeling progress always complicated expen sive age curve really rose RC rich mans hobby Consider dollar volume aeromodeling industry today roughly $500000000 average member 39 yet born time already bewailing lack kids Relatively few us know another world exists Through entirely different outlets barely notice millions ROGs gliders other things sell substantial market thats around half century am reassured letters young people So much asked computer breakdown membership discovered have 11000 group under 19 smart cookies believe manage well things older folks also enjoy know put words thoughts together just finished building TD Coupe reports Mike OBryan 16-year-old What ask TD Coupe dont ask Mike appeared long ago MAN thought niftiest gassie see print Old-Timer designed Theodore Dykzoelwhere TD comes fromin 1936 graceful Old-Tim ers two factors consider before building Old-Timer continues Mike First foremost must pretty cause dont like aint gonna build Second like design isnt done very often ship fits both criteria first humbling effort covering silk although doubt will last yard white polka dot silk hobby shop has sitting bottom box since Wright brothers flew Kitty Hawk Im sucker fun crazy color schemes see two photos TD Coupes the left being Mikes other dads twist Young Mike covered silk dad preferred MonoKote Pop used fiberglass cowl Mike made balsa split middle access Mike blew up plans original 630 sq 900 Mikes silky aimed 60 oz caine out 64 K&B 40 SAM Society Antique Mod elers competition loading mere 1024 oz/sq ft Pops iron-on ship hit 12 OS 60 four-stroke Mike asked Pop would quicker trim spraying hand-painting told should take too long mask off hand-paint took Mike month paint sand trim Mike jokes dads 12-oz-loaded job proverbial lead sled loading similar Kaydet Sr makes Mike wonder Senior can soared expect Kaydet Sr soar fairly low-aspect wing mind ramble little Mike asks have something get off chest issue Junior problem Granted AMA card says Im Senior think am qualified enough give point view other side fence Mike have undivided attention column always melts down some place age instant gratification Mike advises us have fast foods drivethrough tellers banks commercial jets travel faster speed sound can get halfway across world matter hours overnight mall one-hour film processing super glues set seconds frozen foods get picture Whenever show friends hobby first comment make dont have patience fact some think Im crazy because cant imagine spending time building have possibility its being wiped out matter seconds Something else modeling fraternity has nt considered type young people hobby tends attract Generally athletic types have free time wrapped up organized sports therefore non-athletic likely participate hobby generalization isnt always true because other minor RC club 300 both engaged sports during school year other diversions like home computers people have days TV has infiltrated 99% American homes people have writing articles concerning problem blame cost dont really think problem because generally kid wants something hell save money until has enough Usually son daughter shows genuine interest something parents will help back financially Obviously hobby doesnt need expensive much does take make Control Line matter simple chuck glider usually kid thinks model alrplanes conjures up images expensive RC type am fortunate enough have father involved can honestly say pay about 90% hobby expenses through lawn mowing jobs have summer kids out have patience willing learn May relate experience couple years ago During summer sometimes get bored pass time Ill make chuckie fly front house until lands roof time made proved better flier anticipated None gliders ever great performance would stay up about seven seconds before crashing ground So took littie brother two chuckies over local grade school got eft Sixteen-year-old Mike 0Bryan enlarged plans TD Coupe 1936 MAN tram 630 900 sq TorSAM competition K&B 40 silk covered brush trimmed has split balsa cowl Hes designing 9-ft Ryson K&B 19 some 25 Claude Ryans elegant power/soarer retirement joy Right dad MonoKoted TO dont guys have covering preferences reversed 05 60 four-stroke power Mikes 64-oz beauty hess 1024 az/sq ft wing loading dads 12 oz Mike jokesthat itisa proverbial lead-sled 18 Model Aviation about eight nine years old romping around immediately gathered around started flying Three got bored after 15 minutes went back roughhousing stayed totally fascinated taught him throw correctly spent next two three hours throwing little chuckie around schoolyard didnt lose interest wings broke off wait 20 minutes Testors Green Tube cement back never saw kid again mistake because responsibility follow up Au Reminds Delta Dart promotions What Im trying point out kids Out up us find name Chris Register live Stone Mountain GA writes another upbeat young guy sounds running president have model aviation enthusiast since eight years old Au Now did get started am now 18 engineering student De Vry Technical Institute Decatur see other modelers have sent photo graphs have shown short write up Au positive approach am sending some photos recent project Gold berg Sky Tiger powered HB 40 ample power Believe actually flew slang word vocabulary skulter through whole Turnaround pat tern glitch bit sloppy maybe couldnt get flat spin satisfactorily chopped six inches off wing Man watch out Now its hard keep out em really admire old-timers keeping sport alive people like Au think means uns like dont think model aviation will ever die Thats about dont want take up too much flying time own philosophizing point out young guys dont instantly lock onto thing youll note Chris Comet T-Craft rubbe- job picked up three years ago K-Mart $159 Flies great says Chris urse.. Kids us am 70 years old have enjoyed building flying models ever since put plans old Boys Lfr John Van Ryzin checks Au John could have American Boy Milwaukee Journal used publish plans rubber-powered models Au Both Scripps-Howard Junior Aviators Hearst Junior Birdmenpapers big modelingprograms Remember old Aframe twin pushers made winders old egg beaters Lots fun Carved own left- right-hand props Au did some fun got RC retired married children gave Sanwa two-channel Andrews H-Ray What leaming experience powered Enya 15 III Control Line engine thought because flew Waco biplanes Stinson Trimotors full-scale ones flying model radio control leadpipe cinch 65 hand-to-eye coordination greatest conquered Au full-scale pilots have terrible time AC say miss feedback get seated cockpit overcontrol left-right nightmare versatile pilot know scares daylights out himself bystanders Tele masterwhich willfree flight its own dont bother stick whomping cure get up about 300 feet accept soothing words understanding low-key instructor stupid enough say give left right up down blows mind too fly straight lines back forth low power until find faith machine yourself get left-right stuff overcontrolling out system flew Control Line Stunt Combat well took 52-ft cables anchored CG cabin installed cable guide end wing flew H-Ray off schoolyard parking lot like CCW Control Line used spare tire car unimpressive pic rubber-powered T-crafttickles Winterto no end Chris says Comet Taylorcraft picked up local K-Mart $159 Its great flier too second airplane Sterling Citabria Chris states old can build like loved plane skills refined enough back fly very well Yes bitthe dust Young old theres lesson there. someplace adapter located center wheel adapter 1-in pipe center 3-fthigh broom handle mast top ofthe mast eight-penny nail could loop Du-Bro line connector over center pivot used stones weight tire would slip high speed centrifugal force made hundreds takeoffs landings Heres baby says 18-year-old Chris Register Goldberg Sky Tiger powered HB 40 unreal performance finally learned sustained inverted flight Winter says Chris later chopped off 6 span could inverted spins Heres Chris 14 Pilot GB 40 built friend Surprised him flew great Winter says 14 didnt know what ROG took him 30 years try fly things like Chris bomb Left This Antic still flies great 05 60 four-stroke after six years Right Lufberrys Nieuport has authentic instruments French complete cockpit folding gun rigging perthe original Shown OS 60 four-stroke Williams Bros LeRhone miniature Now has 05 90 four-stroke bar-stock LeRhone dummywe suppose needed additional nose weight power Actual size stated Let Scratch-built Aviantiker 0-3 part Antic part Aviatic part Rumpler Slow graceful OS 60 four-stroke Winter says Al should allow out night Right Dennyplane OS 40 four-stroke Takes off half-throttle cruises just above idle Au Evidently means Radio Control until gained enough courage let H-Ray go put small amounts fuel limit engine run no throttle control landing ending deadstick sure learns land way Happy day no crackups thought Id share idea anyone cannot get instructor help works fine ifyou have flown Control Line lot Any way can own first RC flight landed runway Walt Schroder hand-launched beast 7-ft 1947 RC Special rudder four-arm Good brothers escapement no throttle its Ohlsson 60 big stab hit Wait back head kept goingno Walts head talked out loud way landed huge argument over whether free-flighted piloted about loud bumping noise coming transmitter Walt couldnt hear itthough sounded like drum heart prepared flight Waits hold ing big ship aloft country kitchen calling maneuvers worked rudder innocent didnt know enough turn off escapement switch drove 60 miles next day find Ed Lorenz explained consequent mystery dead batteries too pilot never affected attempts fly RCone mans meat is.. Van Ryzin really wrote tell us about clever conversion Eaglet didnt know John Hunton did Screamin Eagle article August 1984 issue Model Aviation last T Ze Flying Circus Albert J Ward another ubiquitous Californian makes feel like blindfolded kid trying pin tail party donkey says model building led directly lifelong career never regretted moment it still fun Hes finished Sterling Ste arman powered OS 90 fourstroke spent three Navy years overhauling Stearmans Staggerwing Beechcrafts NAS Glenview weve few Nats hes added details can remember Spread beside display color photos wondrous variety intriguing ships say least reflect lifetime love affair character subjects hope get withjust few examples pleasureincluding Dennyplanewhich what will write about Due recent columns am flooded Dennyplanes said Midway kit fleet Telemasters spoilers carrying gliders go fly Sunday may encounter 25 Telemasters half spoil ers half gliders topand some both well flaps spoilersand perhaps 20 Model Aviation pictures page just part Al Wards Squadron Left OB 60 monster 0S 90 four-stroke provides air borne launch Marks Models Wanderer Spanning 82 has servo-operated hatch dropping whatever Above No3 Martin Handasyde version French Antoinette 9/48 scale spans 73 0S four-stroke shown now has Salto 45 four-stroke Lateral con trol provided bywing warping King postsand wires galore sprung wire-spoke wheels nose-over skid brasstank radiators pilot 10 Dennyplanes few zooted up ailerons less dihedral get picture Actually Ward gave 4-K kit friend summer vacation surprise friend presented Al ajewel fall framed ready go Al installed OS 40 four-stroker three-channel grossed 4 lb takeoff Gremlins tossed him series glitches resulting series sharp nose-up-and-down undulations high-G roller coaster wing snapped ird zig Kapow bears discussion first let Al tell paid much attention center section already framed up checked drawings built exactly plans entire frame glued Titebond Au think means OK Apparently wing plan shows wing Reginald Denny -even ers mi capal lion ir J wr igr designed strong enough added stresses weight RC flying recom mends future Dennyplane pushers beef up dihedral joints add webbing front spar least halfway out able salvage bird replacing beautiful engine cowl Au lovely cowl seems fascinate us aluminum panworks fine Denny flies just fine slow stable quick take off slow landing Takes off about half throttle cruises just above idle Au Thats fun-perfect tf under powered dont want ha twothirds throttle max takeoff OldTimer Should beef up Denny know will never break wing Old-Timer because fly gently through open loops wish snaps etc Id carry something extra out least one-third semi span across centerline lightly-built design balsa spars absolutely no penalty much insurance substituting same size spruce spars Id stab spar Id build Denny unmodified except Al has described concerns flat-bottom wings possibility radio malfunction would duplicate Als experience Broken wings common RCs early wi lere now eping c alre othy Ott sougn ked afteri nt ughnut shops d Doi rica Cai Banif everyw ould sc imore ing g agian say Hal all flat-bottomed phugoid pitching can fatal Guys would nose over dive pass vertical pull Out elevator killed Lincoln Beachey point exe cute vertical S try enter inverted half outside can flat-bottoms attain sustained inverted abort panic pull sharp split-S varying loads flat-bottom wing flown verge catastrophic youll need spruce sparsand webbing way out Doc Mathews keeps preaching Ive beenhackingbalsawoodsince 1932 am still trying get right comments too modestly Im retired United Airlines After 40 years full-size maintenance can now devote time smaller ones flies Bay area sites getting problem weather permits year-round flying first successful Free Flight inverted Gwinn Aero placed far down 1940 Nats Bantam-engined third-placer 1949 Plymouth Internats still alive sure does have time little ones including OS 40 four-stroke Flying Quaker Super Cyke Buzzard Bombshell Electric Play boy Viking Also Antic sorta-bipe Antic Top Flite J-3 Proctor Nieuport ye Continued page 22 October 1986 21 Sans spinner pic Winters new electric Heron 565 sq area has Robbe/Mabuichi motor cabin extension drive big Robbe folder Does 15 20 mm before dusk three trips max altitude six seven winch tow height Gear removes has yet flown way Has eight 1 2s 075 motor Draws 16 amps static though 28to 35 amps have reported others using com parable setups prop Schmitt pic 1-mm charge Ni-Cd booster Don Srull gets 2 mm FF Pietenpol powered tiny M RC FF electric motor two 100 mAh cells Williams plastic prop plane bigger outdoor CO-2 less fuss Field limits charge Schmit pic See anything different Gordon Stahls Gee Bee Bright red-and-wfllte scneme painted Used Aero Span Balsa USA Missing stab uses Evans/Simitar airfoil Get lust Plone emphasis product rather production Bob Godfrey Precision Built Models Kits creates custom planes very particular customers 1 / 3 scale Laser 200s built Tournament Champions evolved / 3 1 / 4 scale kits newest kit Phoenix 9 continues high standards Precision Built Models previously achieved Bob always striving improve Laser Kits Built Wings Laser Built Bones product building techniques both practical innovative Bob always willing give building engine advice anyone calls case repairs needed may purchase single wing fuse wood parts need Precision Built Models get just kit get service Bobs planes becoming popular planes fly 1/3 1/4 $ 35000$ 22900 6750037500 Laser CoveredBud Light Decals9500050000 Ready Fly eng & Radio Instal12000075000 Universal Receiver Battery Packing Sleeves Ties $250 Phoenix 9 complete kits $15995 Built up prices same 1 / 4 scale Laser Plans parts available Freight included Direct Sales Only P~c-Iskiin Haul Bob Godfrey/ 1818 6th Ave W Bradenton Florida 33505 813-747-7006 gods Martin-Handasyde like Antoinette Falcon 56 Headmaster 40 Q13 60 Monster Dennyplane Jr original Bantam FF Mini-Hogan FF rubber-powered Midwest Gol lywock Comet Sparky coupis Pea nuts .. Ken Willard dont box car column dreamed about Ken go back long way wed talk New York hotel room waited midnight Connie Sleeper LA Hes forgotten about air planes Ill ever know dont argue him seems Ken once published someones analysis claiming prove plane turning upwind downwind 180 will lose altitude Mine always did letters over world can believe own experience Id bet came textbook theorists no hands-on experience Note although plane turned into-thewind path downwind direction Ken did designate infamous killer downwind turn nor reference far fact plane trimmed cruise cruise poweror glider will loses altitude turning out wind will regain coming back wind assuming handsoff stable requires no interfering control inputs Ken told guys bug off like debate over angels can dance head pin paper chase went onand Ken almost lost cool July RCM lets leave Ken fascinating column hold.. want trombones hoary debate drips mossy tendrils definitive confrontation tween authorities took place Flying years ago Results Yer pays money takes yer cherce call basic syndrome Air Ocean pro air ocean theory postulate turning airplane part drifting air mass impervious outside inputs Usually airliner etc pictured 360 over say Pacific say 30000 ft youll never notice anything either aone ortwo needle-width turn heavy fast airplane since its airspeed relative wind encounters far cry model airspeed may compete wind half equal bad day alight moderately-powered plane its velocity plane really impervious its 360 true circle its 360 flight path has elongated downwind abbreviated upwind legs its related ground path naturally much distorted eye earthbound viewer may things wonder about tight 360 performed Cub 50 mph wind much comparable models making hands off 360 same wind Hands off means no control inputs used Entry requires gentlest inputso lets assume second 360 720 years pros said nothing about inertia kinetic energy cons claim factor Both sides argue whether changes direction influenced momentum cons say moving mass will tend continue its already-established direction argue results reduced airflow over wing downwind portion circle hence lowered airspeed consequent change angle attack leading nefarious down wind turn shenanigans ie downwind wind have caused full-scale plane well model fall out air Below will find that Ken shows Continued page 24 22 Model Aviation * Special Detergents help prevent varnish promote clean burning * Rust Preventatives protect expensive engines corrosion SIG CHAMPION 2-STROKE FUEL FREIGHT FREE SHIPPING ON ORDERS OVER $1500COLLECT PINTQUARTGALLON55 GAL DRUM 0% Nitromethane$315$450$1050$19000 5% Nitromethane$365$525$1250$25800 10% Nitromethane$415$550$1450$32500 15% Nitromethane$430$625$1650$38500 25% Nitromethane$495$750$2095$52000 35% Nitromethane$575$875$2495$66000 SIGPREMIUM4-STROKE FUEL 10% Nitromethane$415$550$1395$29500 15% Nitromethane$425$625$1595$35900 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending fuel finest quality ingredients available alcohol 995% pure very best grade available nitromethane use 100% pure get honest portion based % volume maximum lubrication get perfect 50/50 blend Bakers AA Castor Oil Klotz Techniplate Racing Oil protect expensive engines finest quaiity fuel can made price Dont take word try some judge yourself l See dealer first available order direct Call ri 800-247-5008 toll free orders Latest Catalog $300 ~LJ SIG MANUFACTURING CO Montezuma IA 50171 Prices sutitect chanee notice Hands Off Cut II Especially Designed Tapered Wings HANDS OFF CUT II unique device cutting high quality foam wing cores hands off also cuts both sides same time Most modelers will amazed high quality smooth surface will achieve using device plus added advantage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam components such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble s approximately 15 minutes Dealers Wanted Hands Off Cut II Hardware Pkgl $8750 plus $3 ship ft hand 24 Volt Variable Output Power Supply$5250 pius $3 ship ft hand //5 NORRAY PRODUCTS INC __________ 5008 Sandbeach Road Wichita Falls TX 76310 Tel 81716924475 VISA 11 oversimplification key question being whether kinetic energy momentum inertia whatever relative earth indicates air prefer go latter interpretation Aside saw good pilot bring big MAN Monocoupea fine modelover fence against strong wind slightly dip tip recover quickly nice go-round 360 entering approach again downwind fell like stone pilot Quarter Scale expert recovery 360 continued direction slightly dropped wing back over fence out good wind old approach path what considered enough added power flying Mono relative earth safe eye needed much power airspeed wider recovery pattern what appeared ade quate reader wonders about years old Kougar doing same thing excellent plane Another lost Stolph Starlet same way though crack flier asks have clues common denominator dreaded downwind turn opposing viewpoints will probably never reconciled Example two aero engineers high-time pilots expert model fliers pursued debate bitter end have files access finest scientific brains organizationsand mean biggies team least six organizations proved its case disproved others What think Ken just published thorough article math Thermalist newsletter Soaring Society East Tennessee sup posedly settles matter Kens words article proved yer takes yer cherce always kinetic energy relative ground key factor downwind furor Ken trotted out box car scrambled poor brain box car travels down track speed matching wind speed flies Indoor model constant 360s airspeed model 20mph Its speed inside box car traveling downwind 20mph flies against wind zero relative ground As circles downwind airspeed 40 mph 20mph relative moving car Ken asks Does model climb going against wind lose altitude downwind expected kinetic energy relative ground speed air nightmare true box car jerked instantaneous stop jerked instantly 20 mph again Didthe circling model remain center car dreams have meaning seeing circle Control Line lower wing tip center earth Since model banked turn its wing loading highertrue things fly tightlybanked Spitfire stalls 250 mph Still fog imagined model flying around pylon CL fashion being gravity Does matter box car goes Now half awake realize two things box car en capsulated box air model being Free Flight subject full range ac celeration/deceleration results RC control inputsthat pilot errors Does Kens model know upwind downwind within its moving encapsulated chunk still air sure dont know Note Ken does discount kinetic energy asks rather think relative ground air choice words suggests thinks relative air think him correctbut am Kinetic energy involves mass speed flying machine no kinetic energyno tenContinued page 26 24 Model Aviation ALL PURPOSE FOAM CU1TER POSI CURE CYANOACRYLATE SPECIAL INTRODUCTORY OFFER List Sale Savings 1 oz Fast Cure 3-5 Sec495$2450% Off 2 oz Fast Cure 3-5 Sec895$39656% Off 1 oz Gap-Filling 5 Sec495$249500/a Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied P051-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 2514789 SHIPPING Out State INFO 408 251-0787 Californiaper order Hour Mon-Wed Fr & Sat 930-530 FAST SERVICE 930-900 1200-500 COD ADD $190 dency remain motion maintain direction resist changes direction certainly would affect flight path plane could fly flying machine possesses no kin etic energy airspeed balloon zero wind stabilized fixed altitude Considerthis too An unintentional spin entry usually deadly snap differs inten tional spin entry plane slowed level flight stall occurs rudder jammed direction wanted spin accidental spin can entered out bottom over top Modelers say wing outside circle traveling faster therefore spin out bottom slower-moving wing quits Yet snaps over top training over-the-top entry executed maintaining slightly banked climbing turn top wing quits eventually Cub will roll over top entering spin right what left climbing turn suspect reason tad down aileron required maintained left climbing turn washin condition whereas slower lower wing its slight up aileron has washout course neutral ailerons present much normal flying would probably see over-the-top entry unless plane steeply banked high-speed turn time have seen model snap under such conditions over topsuch 09-pow ered little Scale foamie racked around too far downwind three-channel ship aileron position factor true downwind turn back wind pilot always yelled interference High-speed secondary stalls un known vast majority modelers Years ago Cdr Green invented stall warning indicator interviewed him Interavia fourlanguageeditionsSwiss aero journal partial stall Bonanza recovery horizon plenty power level flight reestablished ship feeling solid flew straight out good indicated airspeed after lapse seconds warning indicator intoned series tiny beeps plane stall region Obviously still power required Until side other gives up sin openminded comes air ocean genesis debate know models conformprobably because comparable condi tions necessary laboratory situation cannot created Hands now no flying moving aircraft carrier proof recently print Einsteins train inside Kens box car calm air Ive set up lightlyloaded low-powered craft perform 360s 720s hands off no changes altitude wind always lose altitude downwind side regain upwind flight circle tilted disk Proves nothing guess view Kens question whetherthat altitude loss due kinetic energy relative ground speed earthor air What see easily rubber good breeze wind strikes underside plane begins its hoped-for 360 low power high-pitch prop its climb poor nonexistent downwind leg prop slows down seems flail air airspeed obviously off though ground speed may great coming around wind plane will zoomespecially flat-bottom foil rpm picks up toowhich sometimes re sults stalls whip stalls Lift appears tremendously maguified point Continued page 128 26 Model Aviation ROUSH KITS TaylorCraft Full span 108 Area 1670 clipped 84 Area 1300 Power 75 12 Cu Oalaa&PIy 10-l2lbe $11996 Super Sport 120 Span 73 Area 960 Power 75 12 Cu Ifl $9996 Super Kwik Fli Span 70 Area 927 Power 75 12 Cu Ifl $8996 Two Ugly Stick Span 70 Area 1290 Power 75 12 Cu $9995 Jr Sticks Span 72 Area 1080 Power 75 12 Cu $7996 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1728 Dywood St SE Canton Ohio 44707 2144644610 THE LEADER IN COMPETITION PROPELLERS NEW 4 CYCLE SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHELATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 12 66A778 299 136778379 146778479 1567689 16678989 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 53/i34149 634149 72833A456179 83344568189 8/4566A7199 94566A77199 104566A7209 106W8W209 106EW219 114677778229 115W229 116EW239 11I67239 124W279 125W279 1256279 1356349 1456459 1556659 164AN969 16678969 RO PYLON RACING SERIES 500 DIAPITCHPRICE 7SN 5N279 8I67/7I8299 SERIES 400C 8/66777289 9777289 W WIDE BLADE EW EXTRA WIDE N NARROW cssI coazr tNDED Safety/Preston Continued page 16 Balsa knives Up point months column has offered advice us build internal-combustion engine-powered models As postscript comes safety message Scale Staffel newsletter should interest modelers came way Bill Winter author Just Fun column magazine Some five years ago reported incident also relayed via Bill concerned modeler bled death after cut himself leg balsa knife knives can hazardous Consider following tip Scale Staffel newsletter editor dont know name JP hobby knife quietly roll off work bench drop lap bury entire length blade right inner thigh bad news wound got infected very painful good news did land mere two inches left 25 cents could purchase cheapest surance life sketch accompanied Scale Staffel newsletter safety tip showed soft vinyl triangular-shaped sleeve handle knife Apparently can obtained sta tionary stores about 25 50 cents tended slipped onto pencils prevent rolling off tables desks etc claimed such sleeve does interfere use knife may actually help grip handle Have safe month John Preston Model Aviation 1810 Samuel Morse Drive Reston Virginia 22090 Plane Talk/Winter Continued page 26 fly rudder-only RC jobs know can lose downwind out sightunable penetrate after downwind turns down wind portion circle sideways drift lightweight ship revealed wind blowing against top plane Such changes display wind airspeed changing relative other points circle since wind relative wing changing angle attack kinetic energy involved know upon turning wind plane can slow abruptly some reason go climb Dealers Distributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC P 0 Box 2136 Fan-tax Vrgnia 32031 U 5 stall As varying airspeed 360 model find certaln three-channel RC models slow respond rudder downwind sideso much some like Rebel can barely brought back wind rudder action powerful Airspeed over rudder going downwind less no argument therefore less over entire plane including wing plane must accelerate downwind leg malntaln its original speed relative wind So its obvious eye wind time sorta blowing model along say Get out way two Gordon Light Rubber Commer cialsa sport version Wakefield winner flew beautifully gentle wind strong wind always spiraled ground downwind segment circle added dihedral problem vanished no way Rebel GL model could blissfully drifting air ocean Suppose wind As Gordon Light model banks front you see its top dihedral has the top wing see less see lower wing ridiculously large dihedral would see wind large expanse upper wing little nothing lower wing other extremethat no dihedral assuming model banked verticallyyoud see equal area both upper lowerbanked wing know model condition could roll out its own drifting downwind speed match force wind definitely impervious influence wind since blithely floating air ocean aerodynamic soul leave ponder resulting relative wind airfoil both wingsand conse quently whatever angle attack exists model pursues its circular path constantlychanging relative wind increments years experience Don Srull have learned question nothing says scientist par excellence experienced aero nautical engineer constantly-winning modeler varied events Anything I better innocent comments man thinks like model believe pro asr ocean says what see what top cites Hewitt Phillips NASA did definitive analysis would bible subject Hewitt genius knew Indoor days early Thirties cannot argue Phillips says Don proved what see can take place backside gust think what see lightweight turning out wind precisely Hewitts gust condition effect model has created its 128 Model Aviation ao 10SASIFLIIIIG 13S.AAJ AZRCA L16BdhJa LIA5cN uaWpan 8 Luah. poem 6O 90 cun wiagapan 8 1uca power 2 ou L2R FOoT PLAN S1SZOOOZL TGLASS CL3SZOoOlL add 10% hiv A0 PLLZIS N PANTS PO 3 939 ZAH 11 11760 1 716 727O Classic U/C Scale iII sGRATL~ 40 Wing 15 25 Engines 5 0 IL SOMETHING NEW & BETTER! THE uii CWfWVTPf4 SPORT/TRAINER SIMPLE TO BUILD EASY TO FLY TRAINER -ORBUILD IT WITH AILERONS AND DO IT ALL OR WITH 05 ELECTRIC MOTOR 48 SPAN SQ IN 43 OZ SELECTED DIE AND MACHINE CUT BALSA AND PLYWOOD COMPLETE ROLLED PLANS STEP-BY-STEP INSTRUCTIONS ALL HARDWARE AND FORMED GEAR FLY WITH 20 FOUR CYCLE ENGINE ASK YOUR DEALER own back gust world dare say turns chases wind Turning wind effect creating gust-like environment head Its kinetic energy has converted something What really downwind turn way As Ken says downwind upwind has killed hundreds people can kill model go round float force bit dont bring up power youd expect strong wind Before war newly-soloed pilots some commercial guys 250 hours flew lightplanes over homesteads girl friends houses strong wind Theyd bank nicely wind gradually keep forcing circle rudder order see house gal simultaneously trying flatten angle bank ailerons cross controls theyd spin terrible mysterious problem until Leighton Collins explained great little magazine Air Facts As beginner wrote couple humble pieces him son editor Flying believe Argue among yourselves Dont bother pros cons share Willards comment Hey fellows lets knock off Just lets say some will lose altitude some wont will go out limb planes drift downwind Half-empty half-full glasses thats air oceanfor models anyway Bill Winter 4432 Altura Ct Fairfax VA 22030 Radio Technique/Myers Continued page 39 simultaneously order get some protection guy turns checking other users channel same scheme simultaneous use two RC channels imple mented way two parallel independent operating systems can also protect us disastrous consequences simple failures like battery exhaustion having battery antenna wire break pretty common occur rences Calvin Orr Custom Electronics recently loaned prototype Error Switch Normally Calvin supports simultaneous use two different bands such 50MHz 72 MHz goal investigate simultaneous use two 72 MHz frequencies Calvin says simultaneous use two 72 MHz channels including Error Detector switch ing can performed today minor modifications presently-available equipment already done Airtronics AM equipment using modified buddy-box connec tion Stage 2 tests Error Switch loaned came equipped 19 Airtronics connectors cheap way todays prices can buy two complete systems simply add Error Switch modified buddy-box cable join complete Redundant Radio system outlay $500 About Error Switch airborne Error Switch $149 item comes two flavors AM FM prototype AM type Error Switch samples both receiver outputs shuts down whichever receiver suffering inter ference FM version has bit sophisti cated order take care FMs capture Continued page 132 NEW FOX 4CycIe Special MIRACLE GLOW PLUG totally new concept glow plug design Instead using idle bar MIRACLE PLUG built pre-cotubustion chanther important thing plug retains heat better other know Try . 4-cycle motor 2-cycle motor also will get smoother throttle reslonse lrolably will able use less exlensive low nitro fuel Tests also show reduced fuel consumption cases WARNING motor Irobably will idle faster reset throttle erwise might able land Hard believe . course check out MIRACLE PLUG Just case 40702 4-Cycle Glow Plug $275 Manufacturing Company 5305 Towson Avenue Fort Smith AR 72901 October 1986 129 I DAVEY EMS CORPORATION E WOOD LANE MALVERN PA 19355 215 644-6772 dant-channel usage should able use two RC channels
Edition: Model Aviation - 1986/10
Page Numbers: 18, 19, 20, 21, 22, 24, 26, 128, 129
7Bill Winter~ LI________ Plane TaIL THE AVERAGE AGE 105000-plus AMA members 39 two years higher 1978 last curious Before anyone goes flap am Chicken Little sky falling never told nine kids must eat spinach cause its good know average age modelers has rising over 50 years since began 1927 ModelAirplane News 1929 kids gen eration identified Lindythe romance daring World War aces glamour early barnstormers Standards Jennies heroic air mail pilots like Jack Knight landed emergency fires auto headlights saw American Boy its plans Twenties-style appeal 300000 members AMLA preceded AMA starry-eyed Nationals trip prizes Olympics grew up wave modeling progress always complicated expen sive age curve really rose RC rich mans hobby Consider dollar volume aeromodeling industry today roughly $500000000 average member 39 yet born time already bewailing lack kids Relatively few us know another world exists Through entirely different outlets barely notice millions ROGs gliders other things sell substantial market thats around half century am reassured letters young people So much asked computer breakdown membership discovered have 11000 group under 19 smart cookies believe manage well things older folks also enjoy know put words thoughts together just finished building TD Coupe reports Mike OBryan 16-year-old What ask TD Coupe dont ask Mike appeared long ago MAN thought niftiest gassie see print Old-Timer designed Theodore Dykzoelwhere TD comes fromin 1936 graceful Old-Tim ers two factors consider before building Old-Timer continues Mike First foremost must pretty cause dont like aint gonna build Second like design isnt done very often ship fits both criteria first humbling effort covering silk although doubt will last yard white polka dot silk hobby shop has sitting bottom box since Wright brothers flew Kitty Hawk Im sucker fun crazy color schemes see two photos TD Coupes the left being Mikes other dads twist Young Mike covered silk dad preferred MonoKote Pop used fiberglass cowl Mike made balsa split middle access Mike blew up plans original 630 sq 900 Mikes silky aimed 60 oz caine out 64 K&B 40 SAM Society Antique Mod elers competition loading mere 1024 oz/sq ft Pops iron-on ship hit 12 OS 60 four-stroke Mike asked Pop would quicker trim spraying hand-painting told should take too long mask off hand-paint took Mike month paint sand trim Mike jokes dads 12-oz-loaded job proverbial lead sled loading similar Kaydet Sr makes Mike wonder Senior can soared expect Kaydet Sr soar fairly low-aspect wing mind ramble little Mike asks have something get off chest issue Junior problem Granted AMA card says Im Senior think am qualified enough give point view other side fence Mike have undivided attention column always melts down some place age instant gratification Mike advises us have fast foods drivethrough tellers banks commercial jets travel faster speed sound can get halfway across world matter hours overnight mall one-hour film processing super glues set seconds frozen foods get picture Whenever show friends hobby first comment make dont have patience fact some think Im crazy because cant imagine spending time building have possibility its being wiped out matter seconds Something else modeling fraternity has nt considered type young people hobby tends attract Generally athletic types have free time wrapped up organized sports therefore non-athletic likely participate hobby generalization isnt always true because other minor RC club 300 both engaged sports during school year other diversions like home computers people have days TV has infiltrated 99% American homes people have writing articles concerning problem blame cost dont really think problem because generally kid wants something hell save money until has enough Usually son daughter shows genuine interest something parents will help back financially Obviously hobby doesnt need expensive much does take make Control Line matter simple chuck glider usually kid thinks model alrplanes conjures up images expensive RC type am fortunate enough have father involved can honestly say pay about 90% hobby expenses through lawn mowing jobs have summer kids out have patience willing learn May relate experience couple years ago During summer sometimes get bored pass time Ill make chuckie fly front house until lands roof time made proved better flier anticipated None gliders ever great performance would stay up about seven seconds before crashing ground So took littie brother two chuckies over local grade school got eft Sixteen-year-old Mike 0Bryan enlarged plans TD Coupe 1936 MAN tram 630 900 sq TorSAM competition K&B 40 silk covered brush trimmed has split balsa cowl Hes designing 9-ft Ryson K&B 19 some 25 Claude Ryans elegant power/soarer retirement joy Right dad MonoKoted TO dont guys have covering preferences reversed 05 60 four-stroke power Mikes 64-oz beauty hess 1024 az/sq ft wing loading dads 12 oz Mike jokesthat itisa proverbial lead-sled 18 Model Aviation about eight nine years old romping around immediately gathered around started flying Three got bored after 15 minutes went back roughhousing stayed totally fascinated taught him throw correctly spent next two three hours throwing little chuckie around schoolyard didnt lose interest wings broke off wait 20 minutes Testors Green Tube cement back never saw kid again mistake because responsibility follow up Au Reminds Delta Dart promotions What Im trying point out kids Out up us find name Chris Register live Stone Mountain GA writes another upbeat young guy sounds running president have model aviation enthusiast since eight years old Au Now did get started am now 18 engineering student De Vry Technical Institute Decatur see other modelers have sent photo graphs have shown short write up Au positive approach am sending some photos recent project Gold berg Sky Tiger powered HB 40 ample power Believe actually flew slang word vocabulary skulter through whole Turnaround pat tern glitch bit sloppy maybe couldnt get flat spin satisfactorily chopped six inches off wing Man watch out Now its hard keep out em really admire old-timers keeping sport alive people like Au think means uns like dont think model aviation will ever die Thats about dont want take up too much flying time own philosophizing point out young guys dont instantly lock onto thing youll note Chris Comet T-Craft rubbe- job picked up three years ago K-Mart $159 Flies great says Chris urse.. Kids us am 70 years old have enjoyed building flying models ever since put plans old Boys Lfr John Van Ryzin checks Au John could have American Boy Milwaukee Journal used publish plans rubber-powered models Au Both Scripps-Howard Junior Aviators Hearst Junior Birdmenpapers big modelingprograms Remember old Aframe twin pushers made winders old egg beaters Lots fun Carved own left- right-hand props Au did some fun got RC retired married children gave Sanwa two-channel Andrews H-Ray What leaming experience powered Enya 15 III Control Line engine thought because flew Waco biplanes Stinson Trimotors full-scale ones flying model radio control leadpipe cinch 65 hand-to-eye coordination greatest conquered Au full-scale pilots have terrible time AC say miss feedback get seated cockpit overcontrol left-right nightmare versatile pilot know scares daylights out himself bystanders Tele masterwhich willfree flight its own dont bother stick whomping cure get up about 300 feet accept soothing words understanding low-key instructor stupid enough say give left right up down blows mind too fly straight lines back forth low power until find faith machine yourself get left-right stuff overcontrolling out system flew Control Line Stunt Combat well took 52-ft cables anchored CG cabin installed cable guide end wing flew H-Ray off schoolyard parking lot like CCW Control Line used spare tire car unimpressive pic rubber-powered T-crafttickles Winterto no end Chris says Comet Taylorcraft picked up local K-Mart $159 Its great flier too second airplane Sterling Citabria Chris states old can build like loved plane skills refined enough back fly very well Yes bitthe dust Young old theres lesson there. someplace adapter located center wheel adapter 1-in pipe center 3-fthigh broom handle mast top ofthe mast eight-penny nail could loop Du-Bro line connector over center pivot used stones weight tire would slip high speed centrifugal force made hundreds takeoffs landings Heres baby says 18-year-old Chris Register Goldberg Sky Tiger powered HB 40 unreal performance finally learned sustained inverted flight Winter says Chris later chopped off 6 span could inverted spins Heres Chris 14 Pilot GB 40 built friend Surprised him flew great Winter says 14 didnt know what ROG took him 30 years try fly things like Chris bomb Left This Antic still flies great 05 60 four-stroke after six years Right Lufberrys Nieuport has authentic instruments French complete cockpit folding gun rigging perthe original Shown OS 60 four-stroke Williams Bros LeRhone miniature Now has 05 90 four-stroke bar-stock LeRhone dummywe suppose needed additional nose weight power Actual size stated Let Scratch-built Aviantiker 0-3 part Antic part Aviatic part Rumpler Slow graceful OS 60 four-stroke Winter says Al should allow out night Right Dennyplane OS 40 four-stroke Takes off half-throttle cruises just above idle Au Evidently means Radio Control until gained enough courage let H-Ray go put small amounts fuel limit engine run no throttle control landing ending deadstick sure learns land way Happy day no crackups thought Id share idea anyone cannot get instructor help works fine ifyou have flown Control Line lot Any way can own first RC flight landed runway Walt Schroder hand-launched beast 7-ft 1947 RC Special rudder four-arm Good brothers escapement no throttle its Ohlsson 60 big stab hit Wait back head kept goingno Walts head talked out loud way landed huge argument over whether free-flighted piloted about loud bumping noise coming transmitter Walt couldnt hear itthough sounded like drum heart prepared flight Waits hold ing big ship aloft country kitchen calling maneuvers worked rudder innocent didnt know enough turn off escapement switch drove 60 miles next day find Ed Lorenz explained consequent mystery dead batteries too pilot never affected attempts fly RCone mans meat is.. Van Ryzin really wrote tell us about clever conversion Eaglet didnt know John Hunton did Screamin Eagle article August 1984 issue Model Aviation last T Ze Flying Circus Albert J Ward another ubiquitous Californian makes feel like blindfolded kid trying pin tail party donkey says model building led directly lifelong career never regretted moment it still fun Hes finished Sterling Ste arman powered OS 90 fourstroke spent three Navy years overhauling Stearmans Staggerwing Beechcrafts NAS Glenview weve few Nats hes added details can remember Spread beside display color photos wondrous variety intriguing ships say least reflect lifetime love affair character subjects hope get withjust few examples pleasureincluding Dennyplanewhich what will write about Due recent columns am flooded Dennyplanes said Midway kit fleet Telemasters spoilers carrying gliders go fly Sunday may encounter 25 Telemasters half spoil ers half gliders topand some both well flaps spoilersand perhaps 20 Model Aviation pictures page just part Al Wards Squadron Left OB 60 monster 0S 90 four-stroke provides air borne launch Marks Models Wanderer Spanning 82 has servo-operated hatch dropping whatever Above No3 Martin Handasyde version French Antoinette 9/48 scale spans 73 0S four-stroke shown now has Salto 45 four-stroke Lateral con trol provided bywing warping King postsand wires galore sprung wire-spoke wheels nose-over skid brasstank radiators pilot 10 Dennyplanes few zooted up ailerons less dihedral get picture Actually Ward gave 4-K kit friend summer vacation surprise friend presented Al ajewel fall framed ready go Al installed OS 40 four-stroker three-channel grossed 4 lb takeoff Gremlins tossed him series glitches resulting series sharp nose-up-and-down undulations high-G roller coaster wing snapped ird zig Kapow bears discussion first let Al tell paid much attention center section already framed up checked drawings built exactly plans entire frame glued Titebond Au think means OK Apparently wing plan shows wing Reginald Denny -even ers mi capal lion ir J wr igr designed strong enough added stresses weight RC flying recom mends future Dennyplane pushers beef up dihedral joints add webbing front spar least halfway out able salvage bird replacing beautiful engine cowl Au lovely cowl seems fascinate us aluminum panworks fine Denny flies just fine slow stable quick take off slow landing Takes off about half throttle cruises just above idle Au Thats fun-perfect tf under powered dont want ha twothirds throttle max takeoff OldTimer Should beef up Denny know will never break wing Old-Timer because fly gently through open loops wish snaps etc Id carry something extra out least one-third semi span across centerline lightly-built design balsa spars absolutely no penalty much insurance substituting same size spruce spars Id stab spar Id build Denny unmodified except Al has described concerns flat-bottom wings possibility radio malfunction would duplicate Als experience Broken wings common RCs early wi lere now eping c alre othy Ott sougn ked afteri nt ughnut shops d Doi rica Cai Banif everyw ould sc imore ing g agian say Hal all flat-bottomed phugoid pitching can fatal Guys would nose over dive pass vertical pull Out elevator killed Lincoln Beachey point exe cute vertical S try enter inverted half outside can flat-bottoms attain sustained inverted abort panic pull sharp split-S varying loads flat-bottom wing flown verge catastrophic youll need spruce sparsand webbing way out Doc Mathews keeps preaching Ive beenhackingbalsawoodsince 1932 am still trying get right comments too modestly Im retired United Airlines After 40 years full-size maintenance can now devote time smaller ones flies Bay area sites getting problem weather permits year-round flying first successful Free Flight inverted Gwinn Aero placed far down 1940 Nats Bantam-engined third-placer 1949 Plymouth Internats still alive sure does have time little ones including OS 40 four-stroke Flying Quaker Super Cyke Buzzard Bombshell Electric Play boy Viking Also Antic sorta-bipe Antic Top Flite J-3 Proctor Nieuport ye Continued page 22 October 1986 21 Sans spinner pic Winters new electric Heron 565 sq area has Robbe/Mabuichi motor cabin extension drive big Robbe folder Does 15 20 mm before dusk three trips max altitude six seven winch tow height Gear removes has yet flown way Has eight 1 2s 075 motor Draws 16 amps static though 28to 35 amps have reported others using com parable setups prop Schmitt pic 1-mm charge Ni-Cd booster Don Srull gets 2 mm FF Pietenpol powered tiny M RC FF electric motor two 100 mAh cells Williams plastic prop plane bigger outdoor CO-2 less fuss Field limits charge Schmit pic See anything different Gordon Stahls Gee Bee Bright red-and-wfllte scneme painted Used Aero Span Balsa USA Missing stab uses Evans/Simitar airfoil Get lust Plone emphasis product rather production Bob Godfrey Precision Built Models Kits creates custom planes very particular customers 1 / 3 scale Laser 200s built Tournament Champions evolved / 3 1 / 4 scale kits newest kit Phoenix 9 continues high standards Precision Built Models previously achieved Bob always striving improve Laser Kits Built Wings Laser Built Bones product building techniques both practical innovative Bob always willing give building engine advice anyone calls case repairs needed may purchase single wing fuse wood parts need Precision Built Models get just kit get service Bobs planes becoming popular planes fly 1/3 1/4 $ 35000$ 22900 6750037500 Laser CoveredBud Light Decals9500050000 Ready Fly eng & Radio Instal12000075000 Universal Receiver Battery Packing Sleeves Ties $250 Phoenix 9 complete kits $15995 Built up prices same 1 / 4 scale Laser Plans parts available Freight included Direct Sales Only P~c-Iskiin Haul Bob Godfrey/ 1818 6th Ave W Bradenton Florida 33505 813-747-7006 gods Martin-Handasyde like Antoinette Falcon 56 Headmaster 40 Q13 60 Monster Dennyplane Jr original Bantam FF Mini-Hogan FF rubber-powered Midwest Gol lywock Comet Sparky coupis Pea nuts .. Ken Willard dont box car column dreamed about Ken go back long way wed talk New York hotel room waited midnight Connie Sleeper LA Hes forgotten about air planes Ill ever know dont argue him seems Ken once published someones analysis claiming prove plane turning upwind downwind 180 will lose altitude Mine always did letters over world can believe own experience Id bet came textbook theorists no hands-on experience Note although plane turned into-thewind path downwind direction Ken did designate infamous killer downwind turn nor reference far fact plane trimmed cruise cruise poweror glider will loses altitude turning out wind will regain coming back wind assuming handsoff stable requires no interfering control inputs Ken told guys bug off like debate over angels can dance head pin paper chase went onand Ken almost lost cool July RCM lets leave Ken fascinating column hold.. want trombones hoary debate drips mossy tendrils definitive confrontation tween authorities took place Flying years ago Results Yer pays money takes yer cherce call basic syndrome Air Ocean pro air ocean theory postulate turning airplane part drifting air mass impervious outside inputs Usually airliner etc pictured 360 over say Pacific say 30000 ft youll never notice anything either aone ortwo needle-width turn heavy fast airplane since its airspeed relative wind encounters far cry model airspeed may compete wind half equal bad day alight moderately-powered plane its velocity plane really impervious its 360 true circle its 360 flight path has elongated downwind abbreviated upwind legs its related ground path naturally much distorted eye earthbound viewer may things wonder about tight 360 performed Cub 50 mph wind much comparable models making hands off 360 same wind Hands off means no control inputs used Entry requires gentlest inputso lets assume second 360 720 years pros said nothing about inertia kinetic energy cons claim factor Both sides argue whether changes direction influenced momentum cons say moving mass will tend continue its already-established direction argue results reduced airflow over wing downwind portion circle hence lowered airspeed consequent change angle attack leading nefarious down wind turn shenanigans ie downwind wind have caused full-scale plane well model fall out air Below will find that Ken shows Continued page 24 22 Model Aviation * Special Detergents help prevent varnish promote clean burning * Rust Preventatives protect expensive engines corrosion SIG CHAMPION 2-STROKE FUEL FREIGHT FREE SHIPPING ON ORDERS OVER $1500COLLECT PINTQUARTGALLON55 GAL DRUM 0% Nitromethane$315$450$1050$19000 5% Nitromethane$365$525$1250$25800 10% Nitromethane$415$550$1450$32500 15% Nitromethane$430$625$1650$38500 25% Nitromethane$495$750$2095$52000 35% Nitromethane$575$875$2495$66000 SIGPREMIUM4-STROKE FUEL 10% Nitromethane$415$550$1395$29500 15% Nitromethane$425$625$1595$35900 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending fuel finest quality ingredients available alcohol 995% pure very best grade available nitromethane use 100% pure get honest portion based % volume maximum lubrication get perfect 50/50 blend Bakers AA Castor Oil Klotz Techniplate Racing Oil protect expensive engines finest quaiity fuel can made price Dont take word try some judge yourself l See dealer first available order direct Call ri 800-247-5008 toll free orders Latest Catalog $300 ~LJ SIG MANUFACTURING CO Montezuma IA 50171 Prices sutitect chanee notice Hands Off Cut II Especially Designed Tapered Wings HANDS OFF CUT II unique device cutting high quality foam wing cores hands off also cuts both sides same time Most modelers will amazed high quality smooth surface will achieve using device plus added advantage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam components such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble s approximately 15 minutes Dealers Wanted Hands Off Cut II Hardware Pkgl $8750 plus $3 ship ft hand 24 Volt Variable Output Power Supply$5250 pius $3 ship ft hand //5 NORRAY PRODUCTS INC __________ 5008 Sandbeach Road Wichita Falls TX 76310 Tel 81716924475 VISA 11 oversimplification key question being whether kinetic energy momentum inertia whatever relative earth indicates air prefer go latter interpretation Aside saw good pilot bring big MAN Monocoupea fine modelover fence against strong wind slightly dip tip recover quickly nice go-round 360 entering approach again downwind fell like stone pilot Quarter Scale expert recovery 360 continued direction slightly dropped wing back over fence out good wind old approach path what considered enough added power flying Mono relative earth safe eye needed much power airspeed wider recovery pattern what appeared ade quate reader wonders about years old Kougar doing same thing excellent plane Another lost Stolph Starlet same way though crack flier asks have clues common denominator dreaded downwind turn opposing viewpoints will probably never reconciled Example two aero engineers high-time pilots expert model fliers pursued debate bitter end have files access finest scientific brains organizationsand mean biggies team least six organizations proved its case disproved others What think Ken just published thorough article math Thermalist newsletter Soaring Society East Tennessee sup posedly settles matter Kens words article proved yer takes yer cherce always kinetic energy relative ground key factor downwind furor Ken trotted out box car scrambled poor brain box car travels down track speed matching wind speed flies Indoor model constant 360s airspeed model 20mph Its speed inside box car traveling downwind 20mph flies against wind zero relative ground As circles downwind airspeed 40 mph 20mph relative moving car Ken asks Does model climb going against wind lose altitude downwind expected kinetic energy relative ground speed air nightmare true box car jerked instantaneous stop jerked instantly 20 mph again Didthe circling model remain center car dreams have meaning seeing circle Control Line lower wing tip center earth Since model banked turn its wing loading highertrue things fly tightlybanked Spitfire stalls 250 mph Still fog imagined model flying around pylon CL fashion being gravity Does matter box car goes Now half awake realize two things box car en capsulated box air model being Free Flight subject full range ac celeration/deceleration results RC control inputsthat pilot errors Does Kens model know upwind downwind within its moving encapsulated chunk still air sure dont know Note Ken does discount kinetic energy asks rather think relative ground air choice words suggests thinks relative air think him correctbut am Kinetic energy involves mass speed flying machine no kinetic energyno tenContinued page 26 24 Model Aviation ALL PURPOSE FOAM CU1TER POSI CURE CYANOACRYLATE SPECIAL INTRODUCTORY OFFER List Sale Savings 1 oz Fast Cure 3-5 Sec495$2450% Off 2 oz Fast Cure 3-5 Sec895$39656% Off 1 oz Gap-Filling 5 Sec495$249500/a Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied P051-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 2514789 SHIPPING Out State INFO 408 251-0787 Californiaper order Hour Mon-Wed Fr & Sat 930-530 FAST SERVICE 930-900 1200-500 COD ADD $190 dency remain motion maintain direction resist changes direction certainly would affect flight path plane could fly flying machine possesses no kin etic energy airspeed balloon zero wind stabilized fixed altitude Considerthis too An unintentional spin entry usually deadly snap differs inten tional spin entry plane slowed level flight stall occurs rudder jammed direction wanted spin accidental spin can entered out bottom over top Modelers say wing outside circle traveling faster therefore spin out bottom slower-moving wing quits Yet snaps over top training over-the-top entry executed maintaining slightly banked climbing turn top wing quits eventually Cub will roll over top entering spin right what left climbing turn suspect reason tad down aileron required maintained left climbing turn washin condition whereas slower lower wing its slight up aileron has washout course neutral ailerons present much normal flying would probably see over-the-top entry unless plane steeply banked high-speed turn time have seen model snap under such conditions over topsuch 09-pow ered little Scale foamie racked around too far downwind three-channel ship aileron position factor true downwind turn back wind pilot always yelled interference High-speed secondary stalls un known vast majority modelers Years ago Cdr Green invented stall warning indicator interviewed him Interavia fourlanguageeditionsSwiss aero journal partial stall Bonanza recovery horizon plenty power level flight reestablished ship feeling solid flew straight out good indicated airspeed after lapse seconds warning indicator intoned series tiny beeps plane stall region Obviously still power required Until side other gives up sin openminded comes air ocean genesis debate know models conformprobably because comparable condi tions necessary laboratory situation cannot created Hands now no flying moving aircraft carrier proof recently print Einsteins train inside Kens box car calm air Ive set up lightlyloaded low-powered craft perform 360s 720s hands off no changes altitude wind always lose altitude downwind side regain upwind flight circle tilted disk Proves nothing guess view Kens question whetherthat altitude loss due kinetic energy relative ground speed earthor air What see easily rubber good breeze wind strikes underside plane begins its hoped-for 360 low power high-pitch prop its climb poor nonexistent downwind leg prop slows down seems flail air airspeed obviously off though ground speed may great coming around wind plane will zoomespecially flat-bottom foil rpm picks up toowhich sometimes re sults stalls whip stalls Lift appears tremendously maguified point Continued page 128 26 Model Aviation ROUSH KITS TaylorCraft Full span 108 Area 1670 clipped 84 Area 1300 Power 75 12 Cu Oalaa&PIy 10-l2lbe $11996 Super Sport 120 Span 73 Area 960 Power 75 12 Cu Ifl $9996 Super Kwik Fli Span 70 Area 927 Power 75 12 Cu Ifl $8996 Two Ugly Stick Span 70 Area 1290 Power 75 12 Cu $9995 Jr Sticks Span 72 Area 1080 Power 75 12 Cu $7996 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1728 Dywood St SE Canton Ohio 44707 2144644610 THE LEADER IN COMPETITION PROPELLERS NEW 4 CYCLE SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHELATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 12 66A778 299 136778379 146778479 1567689 16678989 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 53/i34149 634149 72833A456179 83344568189 8/4566A7199 94566A77199 104566A7209 106W8W209 106EW219 114677778229 115W229 116EW239 11I67239 124W279 125W279 1256279 1356349 1456459 1556659 164AN969 16678969 RO PYLON RACING SERIES 500 DIAPITCHPRICE 7SN 5N279 8I67/7I8299 SERIES 400C 8/66777289 9777289 W WIDE BLADE EW EXTRA WIDE N NARROW cssI coazr tNDED Safety/Preston Continued page 16 Balsa knives Up point months column has offered advice us build internal-combustion engine-powered models As postscript comes safety message Scale Staffel newsletter should interest modelers came way Bill Winter author Just Fun column magazine Some five years ago reported incident also relayed via Bill concerned modeler bled death after cut himself leg balsa knife knives can hazardous Consider following tip Scale Staffel newsletter editor dont know name JP hobby knife quietly roll off work bench drop lap bury entire length blade right inner thigh bad news wound got infected very painful good news did land mere two inches left 25 cents could purchase cheapest surance life sketch accompanied Scale Staffel newsletter safety tip showed soft vinyl triangular-shaped sleeve handle knife Apparently can obtained sta tionary stores about 25 50 cents tended slipped onto pencils prevent rolling off tables desks etc claimed such sleeve does interfere use knife may actually help grip handle Have safe month John Preston Model Aviation 1810 Samuel Morse Drive Reston Virginia 22090 Plane Talk/Winter Continued page 26 fly rudder-only RC jobs know can lose downwind out sightunable penetrate after downwind turns down wind portion circle sideways drift lightweight ship revealed wind blowing against top plane Such changes display wind airspeed changing relative other points circle since wind relative wing changing angle attack kinetic energy involved know upon turning wind plane can slow abruptly some reason go climb Dealers Distributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC P 0 Box 2136 Fan-tax Vrgnia 32031 U 5 stall As varying airspeed 360 model find certaln three-channel RC models slow respond rudder downwind sideso much some like Rebel can barely brought back wind rudder action powerful Airspeed over rudder going downwind less no argument therefore less over entire plane including wing plane must accelerate downwind leg malntaln its original speed relative wind So its obvious eye wind time sorta blowing model along say Get out way two Gordon Light Rubber Commer cialsa sport version Wakefield winner flew beautifully gentle wind strong wind always spiraled ground downwind segment circle added dihedral problem vanished no way Rebel GL model could blissfully drifting air ocean Suppose wind As Gordon Light model banks front you see its top dihedral has the top wing see less see lower wing ridiculously large dihedral would see wind large expanse upper wing little nothing lower wing other extremethat no dihedral assuming model banked verticallyyoud see equal area both upper lowerbanked wing know model condition could roll out its own drifting downwind speed match force wind definitely impervious influence wind since blithely floating air ocean aerodynamic soul leave ponder resulting relative wind airfoil both wingsand conse quently whatever angle attack exists model pursues its circular path constantlychanging relative wind increments years experience Don Srull have learned question nothing says scientist par excellence experienced aero nautical engineer constantly-winning modeler varied events Anything I better innocent comments man thinks like model believe pro asr ocean says what see what top cites Hewitt Phillips NASA did definitive analysis would bible subject Hewitt genius knew Indoor days early Thirties cannot argue Phillips says Don proved what see can take place backside gust think what see lightweight turning out wind precisely Hewitts gust condition effect model has created its 128 Model Aviation ao 10SASIFLIIIIG 13S.AAJ AZRCA L16BdhJa LIA5cN uaWpan 8 Luah. poem 6O 90 cun wiagapan 8 1uca power 2 ou L2R FOoT PLAN S1SZOOOZL TGLASS CL3SZOoOlL add 10% hiv A0 PLLZIS N PANTS PO 3 939 ZAH 11 11760 1 716 727O Classic U/C Scale iII sGRATL~ 40 Wing 15 25 Engines 5 0 IL SOMETHING NEW & BETTER! THE uii CWfWVTPf4 SPORT/TRAINER SIMPLE TO BUILD EASY TO FLY TRAINER -ORBUILD IT WITH AILERONS AND DO IT ALL OR WITH 05 ELECTRIC MOTOR 48 SPAN SQ IN 43 OZ SELECTED DIE AND MACHINE CUT BALSA AND PLYWOOD COMPLETE ROLLED PLANS STEP-BY-STEP INSTRUCTIONS ALL HARDWARE AND FORMED GEAR FLY WITH 20 FOUR CYCLE ENGINE ASK YOUR DEALER own back gust world dare say turns chases wind Turning wind effect creating gust-like environment head Its kinetic energy has converted something What really downwind turn way As Ken says downwind upwind has killed hundreds people can kill model go round float force bit dont bring up power youd expect strong wind Before war newly-soloed pilots some commercial guys 250 hours flew lightplanes over homesteads girl friends houses strong wind Theyd bank nicely wind gradually keep forcing circle rudder order see house gal simultaneously trying flatten angle bank ailerons cross controls theyd spin terrible mysterious problem until Leighton Collins explained great little magazine Air Facts As beginner wrote couple humble pieces him son editor Flying believe Argue among yourselves Dont bother pros cons share Willards comment Hey fellows lets knock off Just lets say some will lose altitude some wont will go out limb planes drift downwind Half-empty half-full glasses thats air oceanfor models anyway Bill Winter 4432 Altura Ct Fairfax VA 22030 Radio Technique/Myers Continued page 39 simultaneously order get some protection guy turns checking other users channel same scheme simultaneous use two RC channels imple mented way two parallel independent operating systems can also protect us disastrous consequences simple failures like battery exhaustion having battery antenna wire break pretty common occur rences Calvin Orr Custom Electronics recently loaned prototype Error Switch Normally Calvin supports simultaneous use two different bands such 50MHz 72 MHz goal investigate simultaneous use two 72 MHz frequencies Calvin says simultaneous use two 72 MHz channels including Error Detector switch ing can performed today minor modifications presently-available equipment already done Airtronics AM equipment using modified buddy-box connec tion Stage 2 tests Error Switch loaned came equipped 19 Airtronics connectors cheap way todays prices can buy two complete systems simply add Error Switch modified buddy-box cable join complete Redundant Radio system outlay $500 About Error Switch airborne Error Switch $149 item comes two flavors AM FM prototype AM type Error Switch samples both receiver outputs shuts down whichever receiver suffering inter ference FM version has bit sophisti cated order take care FMs capture Continued page 132 NEW FOX 4CycIe Special MIRACLE GLOW PLUG totally new concept glow plug design Instead using idle bar MIRACLE PLUG built pre-cotubustion chanther important thing plug retains heat better other know Try . 4-cycle motor 2-cycle motor also will get smoother throttle reslonse lrolably will able use less exlensive low nitro fuel Tests also show reduced fuel consumption cases WARNING motor Irobably will idle faster reset throttle erwise might able land Hard believe . course check out MIRACLE PLUG Just case 40702 4-Cycle Glow Plug $275 Manufacturing Company 5305 Towson Avenue Fort Smith AR 72901 October 1986 129 I DAVEY EMS CORPORATION E WOOD LANE MALVERN PA 19355 215 644-6772 dant-channel usage should able use two RC channels
Edition: Model Aviation - 1986/10
Page Numbers: 18, 19, 20, 21, 22, 24, 26, 128, 129
7Bill Winter~ LI________ Plane TaIL THE AVERAGE AGE 105000-plus AMA members 39 two years higher 1978 last curious Before anyone goes flap am Chicken Little sky falling never told nine kids must eat spinach cause its good know average age modelers has rising over 50 years since began 1927 ModelAirplane News 1929 kids gen eration identified Lindythe romance daring World War aces glamour early barnstormers Standards Jennies heroic air mail pilots like Jack Knight landed emergency fires auto headlights saw American Boy its plans Twenties-style appeal 300000 members AMLA preceded AMA starry-eyed Nationals trip prizes Olympics grew up wave modeling progress always complicated expen sive age curve really rose RC rich mans hobby Consider dollar volume aeromodeling industry today roughly $500000000 average member 39 yet born time already bewailing lack kids Relatively few us know another world exists Through entirely different outlets barely notice millions ROGs gliders other things sell substantial market thats around half century am reassured letters young people So much asked computer breakdown membership discovered have 11000 group under 19 smart cookies believe manage well things older folks also enjoy know put words thoughts together just finished building TD Coupe reports Mike OBryan 16-year-old What ask TD Coupe dont ask Mike appeared long ago MAN thought niftiest gassie see print Old-Timer designed Theodore Dykzoelwhere TD comes fromin 1936 graceful Old-Tim ers two factors consider before building Old-Timer continues Mike First foremost must pretty cause dont like aint gonna build Second like design isnt done very often ship fits both criteria first humbling effort covering silk although doubt will last yard white polka dot silk hobby shop has sitting bottom box since Wright brothers flew Kitty Hawk Im sucker fun crazy color schemes see two photos TD Coupes the left being Mikes other dads twist Young Mike covered silk dad preferred MonoKote Pop used fiberglass cowl Mike made balsa split middle access Mike blew up plans original 630 sq 900 Mikes silky aimed 60 oz caine out 64 K&B 40 SAM Society Antique Mod elers competition loading mere 1024 oz/sq ft Pops iron-on ship hit 12 OS 60 four-stroke Mike asked Pop would quicker trim spraying hand-painting told should take too long mask off hand-paint took Mike month paint sand trim Mike jokes dads 12-oz-loaded job proverbial lead sled loading similar Kaydet Sr makes Mike wonder Senior can soared expect Kaydet Sr soar fairly low-aspect wing mind ramble little Mike asks have something get off chest issue Junior problem Granted AMA card says Im Senior think am qualified enough give point view other side fence Mike have undivided attention column always melts down some place age instant gratification Mike advises us have fast foods drivethrough tellers banks commercial jets travel faster speed sound can get halfway across world matter hours overnight mall one-hour film processing super glues set seconds frozen foods get picture Whenever show friends hobby first comment make dont have patience fact some think Im crazy because cant imagine spending time building have possibility its being wiped out matter seconds Something else modeling fraternity has nt considered type young people hobby tends attract Generally athletic types have free time wrapped up organized sports therefore non-athletic likely participate hobby generalization isnt always true because other minor RC club 300 both engaged sports during school year other diversions like home computers people have days TV has infiltrated 99% American homes people have writing articles concerning problem blame cost dont really think problem because generally kid wants something hell save money until has enough Usually son daughter shows genuine interest something parents will help back financially Obviously hobby doesnt need expensive much does take make Control Line matter simple chuck glider usually kid thinks model alrplanes conjures up images expensive RC type am fortunate enough have father involved can honestly say pay about 90% hobby expenses through lawn mowing jobs have summer kids out have patience willing learn May relate experience couple years ago During summer sometimes get bored pass time Ill make chuckie fly front house until lands roof time made proved better flier anticipated None gliders ever great performance would stay up about seven seconds before crashing ground So took littie brother two chuckies over local grade school got eft Sixteen-year-old Mike 0Bryan enlarged plans TD Coupe 1936 MAN tram 630 900 sq TorSAM competition K&B 40 silk covered brush trimmed has split balsa cowl Hes designing 9-ft Ryson K&B 19 some 25 Claude Ryans elegant power/soarer retirement joy Right dad MonoKoted TO dont guys have covering preferences reversed 05 60 four-stroke power Mikes 64-oz beauty hess 1024 az/sq ft wing loading dads 12 oz Mike jokesthat itisa proverbial lead-sled 18 Model Aviation about eight nine years old romping around immediately gathered around started flying Three got bored after 15 minutes went back roughhousing stayed totally fascinated taught him throw correctly spent next two three hours throwing little chuckie around schoolyard didnt lose interest wings broke off wait 20 minutes Testors Green Tube cement back never saw kid again mistake because responsibility follow up Au Reminds Delta Dart promotions What Im trying point out kids Out up us find name Chris Register live Stone Mountain GA writes another upbeat young guy sounds running president have model aviation enthusiast since eight years old Au Now did get started am now 18 engineering student De Vry Technical Institute Decatur see other modelers have sent photo graphs have shown short write up Au positive approach am sending some photos recent project Gold berg Sky Tiger powered HB 40 ample power Believe actually flew slang word vocabulary skulter through whole Turnaround pat tern glitch bit sloppy maybe couldnt get flat spin satisfactorily chopped six inches off wing Man watch out Now its hard keep out em really admire old-timers keeping sport alive people like Au think means uns like dont think model aviation will ever die Thats about dont want take up too much flying time own philosophizing point out young guys dont instantly lock onto thing youll note Chris Comet T-Craft rubbe- job picked up three years ago K-Mart $159 Flies great says Chris urse.. Kids us am 70 years old have enjoyed building flying models ever since put plans old Boys Lfr John Van Ryzin checks Au John could have American Boy Milwaukee Journal used publish plans rubber-powered models Au Both Scripps-Howard Junior Aviators Hearst Junior Birdmenpapers big modelingprograms Remember old Aframe twin pushers made winders old egg beaters Lots fun Carved own left- right-hand props Au did some fun got RC retired married children gave Sanwa two-channel Andrews H-Ray What leaming experience powered Enya 15 III Control Line engine thought because flew Waco biplanes Stinson Trimotors full-scale ones flying model radio control leadpipe cinch 65 hand-to-eye coordination greatest conquered Au full-scale pilots have terrible time AC say miss feedback get seated cockpit overcontrol left-right nightmare versatile pilot know scares daylights out himself bystanders Tele masterwhich willfree flight its own dont bother stick whomping cure get up about 300 feet accept soothing words understanding low-key instructor stupid enough say give left right up down blows mind too fly straight lines back forth low power until find faith machine yourself get left-right stuff overcontrolling out system flew Control Line Stunt Combat well took 52-ft cables anchored CG cabin installed cable guide end wing flew H-Ray off schoolyard parking lot like CCW Control Line used spare tire car unimpressive pic rubber-powered T-crafttickles Winterto no end Chris says Comet Taylorcraft picked up local K-Mart $159 Its great flier too second airplane Sterling Citabria Chris states old can build like loved plane skills refined enough back fly very well Yes bitthe dust Young old theres lesson there. someplace adapter located center wheel adapter 1-in pipe center 3-fthigh broom handle mast top ofthe mast eight-penny nail could loop Du-Bro line connector over center pivot used stones weight tire would slip high speed centrifugal force made hundreds takeoffs landings Heres baby says 18-year-old Chris Register Goldberg Sky Tiger powered HB 40 unreal performance finally learned sustained inverted flight Winter says Chris later chopped off 6 span could inverted spins Heres Chris 14 Pilot GB 40 built friend Surprised him flew great Winter says 14 didnt know what ROG took him 30 years try fly things like Chris bomb Left This Antic still flies great 05 60 four-stroke after six years Right Lufberrys Nieuport has authentic instruments French complete cockpit folding gun rigging perthe original Shown OS 60 four-stroke Williams Bros LeRhone miniature Now has 05 90 four-stroke bar-stock LeRhone dummywe suppose needed additional nose weight power Actual size stated Let Scratch-built Aviantiker 0-3 part Antic part Aviatic part Rumpler Slow graceful OS 60 four-stroke Winter says Al should allow out night Right Dennyplane OS 40 four-stroke Takes off half-throttle cruises just above idle Au Evidently means Radio Control until gained enough courage let H-Ray go put small amounts fuel limit engine run no throttle control landing ending deadstick sure learns land way Happy day no crackups thought Id share idea anyone cannot get instructor help works fine ifyou have flown Control Line lot Any way can own first RC flight landed runway Walt Schroder hand-launched beast 7-ft 1947 RC Special rudder four-arm Good brothers escapement no throttle its Ohlsson 60 big stab hit Wait back head kept goingno Walts head talked out loud way landed huge argument over whether free-flighted piloted about loud bumping noise coming transmitter Walt couldnt hear itthough sounded like drum heart prepared flight Waits hold ing big ship aloft country kitchen calling maneuvers worked rudder innocent didnt know enough turn off escapement switch drove 60 miles next day find Ed Lorenz explained consequent mystery dead batteries too pilot never affected attempts fly RCone mans meat is.. Van Ryzin really wrote tell us about clever conversion Eaglet didnt know John Hunton did Screamin Eagle article August 1984 issue Model Aviation last T Ze Flying Circus Albert J Ward another ubiquitous Californian makes feel like blindfolded kid trying pin tail party donkey says model building led directly lifelong career never regretted moment it still fun Hes finished Sterling Ste arman powered OS 90 fourstroke spent three Navy years overhauling Stearmans Staggerwing Beechcrafts NAS Glenview weve few Nats hes added details can remember Spread beside display color photos wondrous variety intriguing ships say least reflect lifetime love affair character subjects hope get withjust few examples pleasureincluding Dennyplanewhich what will write about Due recent columns am flooded Dennyplanes said Midway kit fleet Telemasters spoilers carrying gliders go fly Sunday may encounter 25 Telemasters half spoil ers half gliders topand some both well flaps spoilersand perhaps 20 Model Aviation pictures page just part Al Wards Squadron Left OB 60 monster 0S 90 four-stroke provides air borne launch Marks Models Wanderer Spanning 82 has servo-operated hatch dropping whatever Above No3 Martin Handasyde version French Antoinette 9/48 scale spans 73 0S four-stroke shown now has Salto 45 four-stroke Lateral con trol provided bywing warping King postsand wires galore sprung wire-spoke wheels nose-over skid brasstank radiators pilot 10 Dennyplanes few zooted up ailerons less dihedral get picture Actually Ward gave 4-K kit friend summer vacation surprise friend presented Al ajewel fall framed ready go Al installed OS 40 four-stroker three-channel grossed 4 lb takeoff Gremlins tossed him series glitches resulting series sharp nose-up-and-down undulations high-G roller coaster wing snapped ird zig Kapow bears discussion first let Al tell paid much attention center section already framed up checked drawings built exactly plans entire frame glued Titebond Au think means OK Apparently wing plan shows wing Reginald Denny -even ers mi capal lion ir J wr igr designed strong enough added stresses weight RC flying recom mends future Dennyplane pushers beef up dihedral joints add webbing front spar least halfway out able salvage bird replacing beautiful engine cowl Au lovely cowl seems fascinate us aluminum panworks fine Denny flies just fine slow stable quick take off slow landing Takes off about half throttle cruises just above idle Au Thats fun-perfect tf under powered dont want ha twothirds throttle max takeoff OldTimer Should beef up Denny know will never break wing Old-Timer because fly gently through open loops wish snaps etc Id carry something extra out least one-third semi span across centerline lightly-built design balsa spars absolutely no penalty much insurance substituting same size spruce spars Id stab spar Id build Denny unmodified except Al has described concerns flat-bottom wings possibility radio malfunction would duplicate Als experience Broken wings common RCs early wi lere now eping c alre othy Ott sougn ked afteri nt ughnut shops d Doi rica Cai Banif everyw ould sc imore ing g agian say Hal all flat-bottomed phugoid pitching can fatal Guys would nose over dive pass vertical pull Out elevator killed Lincoln Beachey point exe cute vertical S try enter inverted half outside can flat-bottoms attain sustained inverted abort panic pull sharp split-S varying loads flat-bottom wing flown verge catastrophic youll need spruce sparsand webbing way out Doc Mathews keeps preaching Ive beenhackingbalsawoodsince 1932 am still trying get right comments too modestly Im retired United Airlines After 40 years full-size maintenance can now devote time smaller ones flies Bay area sites getting problem weather permits year-round flying first successful Free Flight inverted Gwinn Aero placed far down 1940 Nats Bantam-engined third-placer 1949 Plymouth Internats still alive sure does have time little ones including OS 40 four-stroke Flying Quaker Super Cyke Buzzard Bombshell Electric Play boy Viking Also Antic sorta-bipe Antic Top Flite J-3 Proctor Nieuport ye Continued page 22 October 1986 21 Sans spinner pic Winters new electric Heron 565 sq area has Robbe/Mabuichi motor cabin extension drive big Robbe folder Does 15 20 mm before dusk three trips max altitude six seven winch tow height Gear removes has yet flown way Has eight 1 2s 075 motor Draws 16 amps static though 28to 35 amps have reported others using com parable setups prop Schmitt pic 1-mm charge Ni-Cd booster Don Srull gets 2 mm FF Pietenpol powered tiny M RC FF electric motor two 100 mAh cells Williams plastic prop plane bigger outdoor CO-2 less fuss Field limits charge Schmit pic See anything different Gordon Stahls Gee Bee Bright red-and-wfllte scneme painted Used Aero Span Balsa USA Missing stab uses Evans/Simitar airfoil Get lust Plone emphasis product rather production Bob Godfrey Precision Built Models Kits creates custom planes very particular customers 1 / 3 scale Laser 200s built Tournament Champions evolved / 3 1 / 4 scale kits newest kit Phoenix 9 continues high standards Precision Built Models previously achieved Bob always striving improve Laser Kits Built Wings Laser Built Bones product building techniques both practical innovative Bob always willing give building engine advice anyone calls case repairs needed may purchase single wing fuse wood parts need Precision Built Models get just kit get service Bobs planes becoming popular planes fly 1/3 1/4 $ 35000$ 22900 6750037500 Laser CoveredBud Light Decals9500050000 Ready Fly eng & Radio Instal12000075000 Universal Receiver Battery Packing Sleeves Ties $250 Phoenix 9 complete kits $15995 Built up prices same 1 / 4 scale Laser Plans parts available Freight included Direct Sales Only P~c-Iskiin Haul Bob Godfrey/ 1818 6th Ave W Bradenton Florida 33505 813-747-7006 gods Martin-Handasyde like Antoinette Falcon 56 Headmaster 40 Q13 60 Monster Dennyplane Jr original Bantam FF Mini-Hogan FF rubber-powered Midwest Gol lywock Comet Sparky coupis Pea nuts .. Ken Willard dont box car column dreamed about Ken go back long way wed talk New York hotel room waited midnight Connie Sleeper LA Hes forgotten about air planes Ill ever know dont argue him seems Ken once published someones analysis claiming prove plane turning upwind downwind 180 will lose altitude Mine always did letters over world can believe own experience Id bet came textbook theorists no hands-on experience Note although plane turned into-thewind path downwind direction Ken did designate infamous killer downwind turn nor reference far fact plane trimmed cruise cruise poweror glider will loses altitude turning out wind will regain coming back wind assuming handsoff stable requires no interfering control inputs Ken told guys bug off like debate over angels can dance head pin paper chase went onand Ken almost lost cool July RCM lets leave Ken fascinating column hold.. want trombones hoary debate drips mossy tendrils definitive confrontation tween authorities took place Flying years ago Results Yer pays money takes yer cherce call basic syndrome Air Ocean pro air ocean theory postulate turning airplane part drifting air mass impervious outside inputs Usually airliner etc pictured 360 over say Pacific say 30000 ft youll never notice anything either aone ortwo needle-width turn heavy fast airplane since its airspeed relative wind encounters far cry model airspeed may compete wind half equal bad day alight moderately-powered plane its velocity plane really impervious its 360 true circle its 360 flight path has elongated downwind abbreviated upwind legs its related ground path naturally much distorted eye earthbound viewer may things wonder about tight 360 performed Cub 50 mph wind much comparable models making hands off 360 same wind Hands off means no control inputs used Entry requires gentlest inputso lets assume second 360 720 years pros said nothing about inertia kinetic energy cons claim factor Both sides argue whether changes direction influenced momentum cons say moving mass will tend continue its already-established direction argue results reduced airflow over wing downwind portion circle hence lowered airspeed consequent change angle attack leading nefarious down wind turn shenanigans ie downwind wind have caused full-scale plane well model fall out air Below will find that Ken shows Continued page 24 22 Model Aviation * Special Detergents help prevent varnish promote clean burning * Rust Preventatives protect expensive engines corrosion SIG CHAMPION 2-STROKE FUEL FREIGHT FREE SHIPPING ON ORDERS OVER $1500COLLECT PINTQUARTGALLON55 GAL DRUM 0% Nitromethane$315$450$1050$19000 5% Nitromethane$365$525$1250$25800 10% Nitromethane$415$550$1450$32500 15% Nitromethane$430$625$1650$38500 25% Nitromethane$495$750$2095$52000 35% Nitromethane$575$875$2495$66000 SIGPREMIUM4-STROKE FUEL 10% Nitromethane$415$550$1395$29500 15% Nitromethane$425$625$1595$35900 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending fuel finest quality ingredients available alcohol 995% pure very best grade available nitromethane use 100% pure get honest portion based % volume maximum lubrication get perfect 50/50 blend Bakers AA Castor Oil Klotz Techniplate Racing Oil protect expensive engines finest quaiity fuel can made price Dont take word try some judge yourself l See dealer first available order direct Call ri 800-247-5008 toll free orders Latest Catalog $300 ~LJ SIG MANUFACTURING CO Montezuma IA 50171 Prices sutitect chanee notice Hands Off Cut II Especially Designed Tapered Wings HANDS OFF CUT II unique device cutting high quality foam wing cores hands off also cuts both sides same time Most modelers will amazed high quality smooth surface will achieve using device plus added advantage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam components such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble s approximately 15 minutes Dealers Wanted Hands Off Cut II Hardware Pkgl $8750 plus $3 ship ft hand 24 Volt Variable Output Power Supply$5250 pius $3 ship ft hand //5 NORRAY PRODUCTS INC __________ 5008 Sandbeach Road Wichita Falls TX 76310 Tel 81716924475 VISA 11 oversimplification key question being whether kinetic energy momentum inertia whatever relative earth indicates air prefer go latter interpretation Aside saw good pilot bring big MAN Monocoupea fine modelover fence against strong wind slightly dip tip recover quickly nice go-round 360 entering approach again downwind fell like stone pilot Quarter Scale expert recovery 360 continued direction slightly dropped wing back over fence out good wind old approach path what considered enough added power flying Mono relative earth safe eye needed much power airspeed wider recovery pattern what appeared ade quate reader wonders about years old Kougar doing same thing excellent plane Another lost Stolph Starlet same way though crack flier asks have clues common denominator dreaded downwind turn opposing viewpoints will probably never reconciled Example two aero engineers high-time pilots expert model fliers pursued debate bitter end have files access finest scientific brains organizationsand mean biggies team least six organizations proved its case disproved others What think Ken just published thorough article math Thermalist newsletter Soaring Society East Tennessee sup posedly settles matter Kens words article proved yer takes yer cherce always kinetic energy relative ground key factor downwind furor Ken trotted out box car scrambled poor brain box car travels down track speed matching wind speed flies Indoor model constant 360s airspeed model 20mph Its speed inside box car traveling downwind 20mph flies against wind zero relative ground As circles downwind airspeed 40 mph 20mph relative moving car Ken asks Does model climb going against wind lose altitude downwind expected kinetic energy relative ground speed air nightmare true box car jerked instantaneous stop jerked instantly 20 mph again Didthe circling model remain center car dreams have meaning seeing circle Control Line lower wing tip center earth Since model banked turn its wing loading highertrue things fly tightlybanked Spitfire stalls 250 mph Still fog imagined model flying around pylon CL fashion being gravity Does matter box car goes Now half awake realize two things box car en capsulated box air model being Free Flight subject full range ac celeration/deceleration results RC control inputsthat pilot errors Does Kens model know upwind downwind within its moving encapsulated chunk still air sure dont know Note Ken does discount kinetic energy asks rather think relative ground air choice words suggests thinks relative air think him correctbut am Kinetic energy involves mass speed flying machine no kinetic energyno tenContinued page 26 24 Model Aviation ALL PURPOSE FOAM CU1TER POSI CURE CYANOACRYLATE SPECIAL INTRODUCTORY OFFER List Sale Savings 1 oz Fast Cure 3-5 Sec495$2450% Off 2 oz Fast Cure 3-5 Sec895$39656% Off 1 oz Gap-Filling 5 Sec495$249500/a Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied P051-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 2514789 SHIPPING Out State INFO 408 251-0787 Californiaper order Hour Mon-Wed Fr & Sat 930-530 FAST SERVICE 930-900 1200-500 COD ADD $190 dency remain motion maintain direction resist changes direction certainly would affect flight path plane could fly flying machine possesses no kin etic energy airspeed balloon zero wind stabilized fixed altitude Considerthis too An unintentional spin entry usually deadly snap differs inten tional spin entry plane slowed level flight stall occurs rudder jammed direction wanted spin accidental spin can entered out bottom over top Modelers say wing outside circle traveling faster therefore spin out bottom slower-moving wing quits Yet snaps over top training over-the-top entry executed maintaining slightly banked climbing turn top wing quits eventually Cub will roll over top entering spin right what left climbing turn suspect reason tad down aileron required maintained left climbing turn washin condition whereas slower lower wing its slight up aileron has washout course neutral ailerons present much normal flying would probably see over-the-top entry unless plane steeply banked high-speed turn time have seen model snap under such conditions over topsuch 09-pow ered little Scale foamie racked around too far downwind three-channel ship aileron position factor true downwind turn back wind pilot always yelled interference High-speed secondary stalls un known vast majority modelers Years ago Cdr Green invented stall warning indicator interviewed him Interavia fourlanguageeditionsSwiss aero journal partial stall Bonanza recovery horizon plenty power level flight reestablished ship feeling solid flew straight out good indicated airspeed after lapse seconds warning indicator intoned series tiny beeps plane stall region Obviously still power required Until side other gives up sin openminded comes air ocean genesis debate know models conformprobably because comparable condi tions necessary laboratory situation cannot created Hands now no flying moving aircraft carrier proof recently print Einsteins train inside Kens box car calm air Ive set up lightlyloaded low-powered craft perform 360s 720s hands off no changes altitude wind always lose altitude downwind side regain upwind flight circle tilted disk Proves nothing guess view Kens question whetherthat altitude loss due kinetic energy relative ground speed earthor air What see easily rubber good breeze wind strikes underside plane begins its hoped-for 360 low power high-pitch prop its climb poor nonexistent downwind leg prop slows down seems flail air airspeed obviously off though ground speed may great coming around wind plane will zoomespecially flat-bottom foil rpm picks up toowhich sometimes re sults stalls whip stalls Lift appears tremendously maguified point Continued page 128 26 Model Aviation ROUSH KITS TaylorCraft Full span 108 Area 1670 clipped 84 Area 1300 Power 75 12 Cu Oalaa&PIy 10-l2lbe $11996 Super Sport 120 Span 73 Area 960 Power 75 12 Cu Ifl $9996 Super Kwik Fli Span 70 Area 927 Power 75 12 Cu Ifl $8996 Two Ugly Stick Span 70 Area 1290 Power 75 12 Cu $9995 Jr Sticks Span 72 Area 1080 Power 75 12 Cu $7996 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1728 Dywood St SE Canton Ohio 44707 2144644610 THE LEADER IN COMPETITION PROPELLERS NEW 4 CYCLE SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHELATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 12 66A778 299 136778379 146778479 1567689 16678989 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 53/i34149 634149 72833A456179 83344568189 8/4566A7199 94566A77199 104566A7209 106W8W209 106EW219 114677778229 115W229 116EW239 11I67239 124W279 125W279 1256279 1356349 1456459 1556659 164AN969 16678969 RO PYLON RACING SERIES 500 DIAPITCHPRICE 7SN 5N279 8I67/7I8299 SERIES 400C 8/66777289 9777289 W WIDE BLADE EW EXTRA WIDE N NARROW cssI coazr tNDED Safety/Preston Continued page 16 Balsa knives Up point months column has offered advice us build internal-combustion engine-powered models As postscript comes safety message Scale Staffel newsletter should interest modelers came way Bill Winter author Just Fun column magazine Some five years ago reported incident also relayed via Bill concerned modeler bled death after cut himself leg balsa knife knives can hazardous Consider following tip Scale Staffel newsletter editor dont know name JP hobby knife quietly roll off work bench drop lap bury entire length blade right inner thigh bad news wound got infected very painful good news did land mere two inches left 25 cents could purchase cheapest surance life sketch accompanied Scale Staffel newsletter safety tip showed soft vinyl triangular-shaped sleeve handle knife Apparently can obtained sta tionary stores about 25 50 cents tended slipped onto pencils prevent rolling off tables desks etc claimed such sleeve does interfere use knife may actually help grip handle Have safe month John Preston Model Aviation 1810 Samuel Morse Drive Reston Virginia 22090 Plane Talk/Winter Continued page 26 fly rudder-only RC jobs know can lose downwind out sightunable penetrate after downwind turns down wind portion circle sideways drift lightweight ship revealed wind blowing against top plane Such changes display wind airspeed changing relative other points circle since wind relative wing changing angle attack kinetic energy involved know upon turning wind plane can slow abruptly some reason go climb Dealers Distributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC P 0 Box 2136 Fan-tax Vrgnia 32031 U 5 stall As varying airspeed 360 model find certaln three-channel RC models slow respond rudder downwind sideso much some like Rebel can barely brought back wind rudder action powerful Airspeed over rudder going downwind less no argument therefore less over entire plane including wing plane must accelerate downwind leg malntaln its original speed relative wind So its obvious eye wind time sorta blowing model along say Get out way two Gordon Light Rubber Commer cialsa sport version Wakefield winner flew beautifully gentle wind strong wind always spiraled ground downwind segment circle added dihedral problem vanished no way Rebel GL model could blissfully drifting air ocean Suppose wind As Gordon Light model banks front you see its top dihedral has the top wing see less see lower wing ridiculously large dihedral would see wind large expanse upper wing little nothing lower wing other extremethat no dihedral assuming model banked verticallyyoud see equal area both upper lowerbanked wing know model condition could roll out its own drifting downwind speed match force wind definitely impervious influence wind since blithely floating air ocean aerodynamic soul leave ponder resulting relative wind airfoil both wingsand conse quently whatever angle attack exists model pursues its circular path constantlychanging relative wind increments years experience Don Srull have learned question nothing says scientist par excellence experienced aero nautical engineer constantly-winning modeler varied events Anything I better innocent comments man thinks like model believe pro asr ocean says what see what top cites Hewitt Phillips NASA did definitive analysis would bible subject Hewitt genius knew Indoor days early Thirties cannot argue Phillips says Don proved what see can take place backside gust think what see lightweight turning out wind precisely Hewitts gust condition effect model has created its 128 Model Aviation ao 10SASIFLIIIIG 13S.AAJ AZRCA L16BdhJa LIA5cN uaWpan 8 Luah. poem 6O 90 cun wiagapan 8 1uca power 2 ou L2R FOoT PLAN S1SZOOOZL TGLASS CL3SZOoOlL add 10% hiv A0 PLLZIS N PANTS PO 3 939 ZAH 11 11760 1 716 727O Classic U/C Scale iII sGRATL~ 40 Wing 15 25 Engines 5 0 IL SOMETHING NEW & BETTER! THE uii CWfWVTPf4 SPORT/TRAINER SIMPLE TO BUILD EASY TO FLY TRAINER -ORBUILD IT WITH AILERONS AND DO IT ALL OR WITH 05 ELECTRIC MOTOR 48 SPAN SQ IN 43 OZ SELECTED DIE AND MACHINE CUT BALSA AND PLYWOOD COMPLETE ROLLED PLANS STEP-BY-STEP INSTRUCTIONS ALL HARDWARE AND FORMED GEAR FLY WITH 20 FOUR CYCLE ENGINE ASK YOUR DEALER own back gust world dare say turns chases wind Turning wind effect creating gust-like environment head Its kinetic energy has converted something What really downwind turn way As Ken says downwind upwind has killed hundreds people can kill model go round float force bit dont bring up power youd expect strong wind Before war newly-soloed pilots some commercial guys 250 hours flew lightplanes over homesteads girl friends houses strong wind Theyd bank nicely wind gradually keep forcing circle rudder order see house gal simultaneously trying flatten angle bank ailerons cross controls theyd spin terrible mysterious problem until Leighton Collins explained great little magazine Air Facts As beginner wrote couple humble pieces him son editor Flying believe Argue among yourselves Dont bother pros cons share Willards comment Hey fellows lets knock off Just lets say some will lose altitude some wont will go out limb planes drift downwind Half-empty half-full glasses thats air oceanfor models anyway Bill Winter 4432 Altura Ct Fairfax VA 22030 Radio Technique/Myers Continued page 39 simultaneously order get some protection guy turns checking other users channel same scheme simultaneous use two RC channels imple mented way two parallel independent operating systems can also protect us disastrous consequences simple failures like battery exhaustion having battery antenna wire break pretty common occur rences Calvin Orr Custom Electronics recently loaned prototype Error Switch Normally Calvin supports simultaneous use two different bands such 50MHz 72 MHz goal investigate simultaneous use two 72 MHz frequencies Calvin says simultaneous use two 72 MHz channels including Error Detector switch ing can performed today minor modifications presently-available equipment already done Airtronics AM equipment using modified buddy-box connec tion Stage 2 tests Error Switch loaned came equipped 19 Airtronics connectors cheap way todays prices can buy two complete systems simply add Error Switch modified buddy-box cable join complete Redundant Radio system outlay $500 About Error Switch airborne Error Switch $149 item comes two flavors AM FM prototype AM type Error Switch samples both receiver outputs shuts down whichever receiver suffering inter ference FM version has bit sophisti cated order take care FMs capture Continued page 132 NEW FOX 4CycIe Special MIRACLE GLOW PLUG totally new concept glow plug design Instead using idle bar MIRACLE PLUG built pre-cotubustion chanther important thing plug retains heat better other know Try . 4-cycle motor 2-cycle motor also will get smoother throttle reslonse lrolably will able use less exlensive low nitro fuel Tests also show reduced fuel consumption cases WARNING motor Irobably will idle faster reset throttle erwise might able land Hard believe . course check out MIRACLE PLUG Just case 40702 4-Cycle Glow Plug $275 Manufacturing Company 5305 Towson Avenue Fort Smith AR 72901 October 1986 129 I DAVEY EMS CORPORATION E WOOD LANE MALVERN PA 19355 215 644-6772 dant-channel usage should able use two RC channels
Edition: Model Aviation - 1986/10
Page Numbers: 18, 19, 20, 21, 22, 24, 26, 128, 129
7Bill Winter~ LI________ Plane TaIL THE AVERAGE AGE 105000-plus AMA members 39 two years higher 1978 last curious Before anyone goes flap am Chicken Little sky falling never told nine kids must eat spinach cause its good know average age modelers has rising over 50 years since began 1927 ModelAirplane News 1929 kids gen eration identified Lindythe romance daring World War aces glamour early barnstormers Standards Jennies heroic air mail pilots like Jack Knight landed emergency fires auto headlights saw American Boy its plans Twenties-style appeal 300000 members AMLA preceded AMA starry-eyed Nationals trip prizes Olympics grew up wave modeling progress always complicated expen sive age curve really rose RC rich mans hobby Consider dollar volume aeromodeling industry today roughly $500000000 average member 39 yet born time already bewailing lack kids Relatively few us know another world exists Through entirely different outlets barely notice millions ROGs gliders other things sell substantial market thats around half century am reassured letters young people So much asked computer breakdown membership discovered have 11000 group under 19 smart cookies believe manage well things older folks also enjoy know put words thoughts together just finished building TD Coupe reports Mike OBryan 16-year-old What ask TD Coupe dont ask Mike appeared long ago MAN thought niftiest gassie see print Old-Timer designed Theodore Dykzoelwhere TD comes fromin 1936 graceful Old-Tim ers two factors consider before building Old-Timer continues Mike First foremost must pretty cause dont like aint gonna build Second like design isnt done very often ship fits both criteria first humbling effort covering silk although doubt will last yard white polka dot silk hobby shop has sitting bottom box since Wright brothers flew Kitty Hawk Im sucker fun crazy color schemes see two photos TD Coupes the left being Mikes other dads twist Young Mike covered silk dad preferred MonoKote Pop used fiberglass cowl Mike made balsa split middle access Mike blew up plans original 630 sq 900 Mikes silky aimed 60 oz caine out 64 K&B 40 SAM Society Antique Mod elers competition loading mere 1024 oz/sq ft Pops iron-on ship hit 12 OS 60 four-stroke Mike asked Pop would quicker trim spraying hand-painting told should take too long mask off hand-paint took Mike month paint sand trim Mike jokes dads 12-oz-loaded job proverbial lead sled loading similar Kaydet Sr makes Mike wonder Senior can soared expect Kaydet Sr soar fairly low-aspect wing mind ramble little Mike asks have something get off chest issue Junior problem Granted AMA card says Im Senior think am qualified enough give point view other side fence Mike have undivided attention column always melts down some place age instant gratification Mike advises us have fast foods drivethrough tellers banks commercial jets travel faster speed sound can get halfway across world matter hours overnight mall one-hour film processing super glues set seconds frozen foods get picture Whenever show friends hobby first comment make dont have patience fact some think Im crazy because cant imagine spending time building have possibility its being wiped out matter seconds Something else modeling fraternity has nt considered type young people hobby tends attract Generally athletic types have free time wrapped up organized sports therefore non-athletic likely participate hobby generalization isnt always true because other minor RC club 300 both engaged sports during school year other diversions like home computers people have days TV has infiltrated 99% American homes people have writing articles concerning problem blame cost dont really think problem because generally kid wants something hell save money until has enough Usually son daughter shows genuine interest something parents will help back financially Obviously hobby doesnt need expensive much does take make Control Line matter simple chuck glider usually kid thinks model alrplanes conjures up images expensive RC type am fortunate enough have father involved can honestly say pay about 90% hobby expenses through lawn mowing jobs have summer kids out have patience willing learn May relate experience couple years ago During summer sometimes get bored pass time Ill make chuckie fly front house until lands roof time made proved better flier anticipated None gliders ever great performance would stay up about seven seconds before crashing ground So took littie brother two chuckies over local grade school got eft Sixteen-year-old Mike 0Bryan enlarged plans TD Coupe 1936 MAN tram 630 900 sq TorSAM competition K&B 40 silk covered brush trimmed has split balsa cowl Hes designing 9-ft Ryson K&B 19 some 25 Claude Ryans elegant power/soarer retirement joy Right dad MonoKoted TO dont guys have covering preferences reversed 05 60 four-stroke power Mikes 64-oz beauty hess 1024 az/sq ft wing loading dads 12 oz Mike jokesthat itisa proverbial lead-sled 18 Model Aviation about eight nine years old romping around immediately gathered around started flying Three got bored after 15 minutes went back roughhousing stayed totally fascinated taught him throw correctly spent next two three hours throwing little chuckie around schoolyard didnt lose interest wings broke off wait 20 minutes Testors Green Tube cement back never saw kid again mistake because responsibility follow up Au Reminds Delta Dart promotions What Im trying point out kids Out up us find name Chris Register live Stone Mountain GA writes another upbeat young guy sounds running president have model aviation enthusiast since eight years old Au Now did get started am now 18 engineering student De Vry Technical Institute Decatur see other modelers have sent photo graphs have shown short write up Au positive approach am sending some photos recent project Gold berg Sky Tiger powered HB 40 ample power Believe actually flew slang word vocabulary skulter through whole Turnaround pat tern glitch bit sloppy maybe couldnt get flat spin satisfactorily chopped six inches off wing Man watch out Now its hard keep out em really admire old-timers keeping sport alive people like Au think means uns like dont think model aviation will ever die Thats about dont want take up too much flying time own philosophizing point out young guys dont instantly lock onto thing youll note Chris Comet T-Craft rubbe- job picked up three years ago K-Mart $159 Flies great says Chris urse.. Kids us am 70 years old have enjoyed building flying models ever since put plans old Boys Lfr John Van Ryzin checks Au John could have American Boy Milwaukee Journal used publish plans rubber-powered models Au Both Scripps-Howard Junior Aviators Hearst Junior Birdmenpapers big modelingprograms Remember old Aframe twin pushers made winders old egg beaters Lots fun Carved own left- right-hand props Au did some fun got RC retired married children gave Sanwa two-channel Andrews H-Ray What leaming experience powered Enya 15 III Control Line engine thought because flew Waco biplanes Stinson Trimotors full-scale ones flying model radio control leadpipe cinch 65 hand-to-eye coordination greatest conquered Au full-scale pilots have terrible time AC say miss feedback get seated cockpit overcontrol left-right nightmare versatile pilot know scares daylights out himself bystanders Tele masterwhich willfree flight its own dont bother stick whomping cure get up about 300 feet accept soothing words understanding low-key instructor stupid enough say give left right up down blows mind too fly straight lines back forth low power until find faith machine yourself get left-right stuff overcontrolling out system flew Control Line Stunt Combat well took 52-ft cables anchored CG cabin installed cable guide end wing flew H-Ray off schoolyard parking lot like CCW Control Line used spare tire car unimpressive pic rubber-powered T-crafttickles Winterto no end Chris says Comet Taylorcraft picked up local K-Mart $159 Its great flier too second airplane Sterling Citabria Chris states old can build like loved plane skills refined enough back fly very well Yes bitthe dust Young old theres lesson there. someplace adapter located center wheel adapter 1-in pipe center 3-fthigh broom handle mast top ofthe mast eight-penny nail could loop Du-Bro line connector over center pivot used stones weight tire would slip high speed centrifugal force made hundreds takeoffs landings Heres baby says 18-year-old Chris Register Goldberg Sky Tiger powered HB 40 unreal performance finally learned sustained inverted flight Winter says Chris later chopped off 6 span could inverted spins Heres Chris 14 Pilot GB 40 built friend Surprised him flew great Winter says 14 didnt know what ROG took him 30 years try fly things like Chris bomb Left This Antic still flies great 05 60 four-stroke after six years Right Lufberrys Nieuport has authentic instruments French complete cockpit folding gun rigging perthe original Shown OS 60 four-stroke Williams Bros LeRhone miniature Now has 05 90 four-stroke bar-stock LeRhone dummywe suppose needed additional nose weight power Actual size stated Let Scratch-built Aviantiker 0-3 part Antic part Aviatic part Rumpler Slow graceful OS 60 four-stroke Winter says Al should allow out night Right Dennyplane OS 40 four-stroke Takes off half-throttle cruises just above idle Au Evidently means Radio Control until gained enough courage let H-Ray go put small amounts fuel limit engine run no throttle control landing ending deadstick sure learns land way Happy day no crackups thought Id share idea anyone cannot get instructor help works fine ifyou have flown Control Line lot Any way can own first RC flight landed runway Walt Schroder hand-launched beast 7-ft 1947 RC Special rudder four-arm Good brothers escapement no throttle its Ohlsson 60 big stab hit Wait back head kept goingno Walts head talked out loud way landed huge argument over whether free-flighted piloted about loud bumping noise coming transmitter Walt couldnt hear itthough sounded like drum heart prepared flight Waits hold ing big ship aloft country kitchen calling maneuvers worked rudder innocent didnt know enough turn off escapement switch drove 60 miles next day find Ed Lorenz explained consequent mystery dead batteries too pilot never affected attempts fly RCone mans meat is.. Van Ryzin really wrote tell us about clever conversion Eaglet didnt know John Hunton did Screamin Eagle article August 1984 issue Model Aviation last T Ze Flying Circus Albert J Ward another ubiquitous Californian makes feel like blindfolded kid trying pin tail party donkey says model building led directly lifelong career never regretted moment it still fun Hes finished Sterling Ste arman powered OS 90 fourstroke spent three Navy years overhauling Stearmans Staggerwing Beechcrafts NAS Glenview weve few Nats hes added details can remember Spread beside display color photos wondrous variety intriguing ships say least reflect lifetime love affair character subjects hope get withjust few examples pleasureincluding Dennyplanewhich what will write about Due recent columns am flooded Dennyplanes said Midway kit fleet Telemasters spoilers carrying gliders go fly Sunday may encounter 25 Telemasters half spoil ers half gliders topand some both well flaps spoilersand perhaps 20 Model Aviation pictures page just part Al Wards Squadron Left OB 60 monster 0S 90 four-stroke provides air borne launch Marks Models Wanderer Spanning 82 has servo-operated hatch dropping whatever Above No3 Martin Handasyde version French Antoinette 9/48 scale spans 73 0S four-stroke shown now has Salto 45 four-stroke Lateral con trol provided bywing warping King postsand wires galore sprung wire-spoke wheels nose-over skid brasstank radiators pilot 10 Dennyplanes few zooted up ailerons less dihedral get picture Actually Ward gave 4-K kit friend summer vacation surprise friend presented Al ajewel fall framed ready go Al installed OS 40 four-stroker three-channel grossed 4 lb takeoff Gremlins tossed him series glitches resulting series sharp nose-up-and-down undulations high-G roller coaster wing snapped ird zig Kapow bears discussion first let Al tell paid much attention center section already framed up checked drawings built exactly plans entire frame glued Titebond Au think means OK Apparently wing plan shows wing Reginald Denny -even ers mi capal lion ir J wr igr designed strong enough added stresses weight RC flying recom mends future Dennyplane pushers beef up dihedral joints add webbing front spar least halfway out able salvage bird replacing beautiful engine cowl Au lovely cowl seems fascinate us aluminum panworks fine Denny flies just fine slow stable quick take off slow landing Takes off about half throttle cruises just above idle Au Thats fun-perfect tf under powered dont want ha twothirds throttle max takeoff OldTimer Should beef up Denny know will never break wing Old-Timer because fly gently through open loops wish snaps etc Id carry something extra out least one-third semi span across centerline lightly-built design balsa spars absolutely no penalty much insurance substituting same size spruce spars Id stab spar Id build Denny unmodified except Al has described concerns flat-bottom wings possibility radio malfunction would duplicate Als experience Broken wings common RCs early wi lere now eping c alre othy Ott sougn ked afteri nt ughnut shops d Doi rica Cai Banif everyw ould sc imore ing g agian say Hal all flat-bottomed phugoid pitching can fatal Guys would nose over dive pass vertical pull Out elevator killed Lincoln Beachey point exe cute vertical S try enter inverted half outside can flat-bottoms attain sustained inverted abort panic pull sharp split-S varying loads flat-bottom wing flown verge catastrophic youll need spruce sparsand webbing way out Doc Mathews keeps preaching Ive beenhackingbalsawoodsince 1932 am still trying get right comments too modestly Im retired United Airlines After 40 years full-size maintenance can now devote time smaller ones flies Bay area sites getting problem weather permits year-round flying first successful Free Flight inverted Gwinn Aero placed far down 1940 Nats Bantam-engined third-placer 1949 Plymouth Internats still alive sure does have time little ones including OS 40 four-stroke Flying Quaker Super Cyke Buzzard Bombshell Electric Play boy Viking Also Antic sorta-bipe Antic Top Flite J-3 Proctor Nieuport ye Continued page 22 October 1986 21 Sans spinner pic Winters new electric Heron 565 sq area has Robbe/Mabuichi motor cabin extension drive big Robbe folder Does 15 20 mm before dusk three trips max altitude six seven winch tow height Gear removes has yet flown way Has eight 1 2s 075 motor Draws 16 amps static though 28to 35 amps have reported others using com parable setups prop Schmitt pic 1-mm charge Ni-Cd booster Don Srull gets 2 mm FF Pietenpol powered tiny M RC FF electric motor two 100 mAh cells Williams plastic prop plane bigger outdoor CO-2 less fuss Field limits charge Schmit pic See anything different Gordon Stahls Gee Bee Bright red-and-wfllte scneme painted Used Aero Span Balsa USA Missing stab uses Evans/Simitar airfoil Get lust Plone emphasis product rather production Bob Godfrey Precision Built Models Kits creates custom planes very particular customers 1 / 3 scale Laser 200s built Tournament Champions evolved / 3 1 / 4 scale kits newest kit Phoenix 9 continues high standards Precision Built Models previously achieved Bob always striving improve Laser Kits Built Wings Laser Built Bones product building techniques both practical innovative Bob always willing give building engine advice anyone calls case repairs needed may purchase single wing fuse wood parts need Precision Built Models get just kit get service Bobs planes becoming popular planes fly 1/3 1/4 $ 35000$ 22900 6750037500 Laser CoveredBud Light Decals9500050000 Ready Fly eng & Radio Instal12000075000 Universal Receiver Battery Packing Sleeves Ties $250 Phoenix 9 complete kits $15995 Built up prices same 1 / 4 scale Laser Plans parts available Freight included Direct Sales Only P~c-Iskiin Haul Bob Godfrey/ 1818 6th Ave W Bradenton Florida 33505 813-747-7006 gods Martin-Handasyde like Antoinette Falcon 56 Headmaster 40 Q13 60 Monster Dennyplane Jr original Bantam FF Mini-Hogan FF rubber-powered Midwest Gol lywock Comet Sparky coupis Pea nuts .. Ken Willard dont box car column dreamed about Ken go back long way wed talk New York hotel room waited midnight Connie Sleeper LA Hes forgotten about air planes Ill ever know dont argue him seems Ken once published someones analysis claiming prove plane turning upwind downwind 180 will lose altitude Mine always did letters over world can believe own experience Id bet came textbook theorists no hands-on experience Note although plane turned into-thewind path downwind direction Ken did designate infamous killer downwind turn nor reference far fact plane trimmed cruise cruise poweror glider will loses altitude turning out wind will regain coming back wind assuming handsoff stable requires no interfering control inputs Ken told guys bug off like debate over angels can dance head pin paper chase went onand Ken almost lost cool July RCM lets leave Ken fascinating column hold.. want trombones hoary debate drips mossy tendrils definitive confrontation tween authorities took place Flying years ago Results Yer pays money takes yer cherce call basic syndrome Air Ocean pro air ocean theory postulate turning airplane part drifting air mass impervious outside inputs Usually airliner etc pictured 360 over say Pacific say 30000 ft youll never notice anything either aone ortwo needle-width turn heavy fast airplane since its airspeed relative wind encounters far cry model airspeed may compete wind half equal bad day alight moderately-powered plane its velocity plane really impervious its 360 true circle its 360 flight path has elongated downwind abbreviated upwind legs its related ground path naturally much distorted eye earthbound viewer may things wonder about tight 360 performed Cub 50 mph wind much comparable models making hands off 360 same wind Hands off means no control inputs used Entry requires gentlest inputso lets assume second 360 720 years pros said nothing about inertia kinetic energy cons claim factor Both sides argue whether changes direction influenced momentum cons say moving mass will tend continue its already-established direction argue results reduced airflow over wing downwind portion circle hence lowered airspeed consequent change angle attack leading nefarious down wind turn shenanigans ie downwind wind have caused full-scale plane well model fall out air Below will find that Ken shows Continued page 24 22 Model Aviation * Special Detergents help prevent varnish promote clean burning * Rust Preventatives protect expensive engines corrosion SIG CHAMPION 2-STROKE FUEL FREIGHT FREE SHIPPING ON ORDERS OVER $1500COLLECT PINTQUARTGALLON55 GAL DRUM 0% Nitromethane$315$450$1050$19000 5% Nitromethane$365$525$1250$25800 10% Nitromethane$415$550$1450$32500 15% Nitromethane$430$625$1650$38500 25% Nitromethane$495$750$2095$52000 35% Nitromethane$575$875$2495$66000 SIGPREMIUM4-STROKE FUEL 10% Nitromethane$415$550$1395$29500 15% Nitromethane$425$625$1595$35900 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending fuel finest quality ingredients available alcohol 995% pure very best grade available nitromethane use 100% pure get honest portion based % volume maximum lubrication get perfect 50/50 blend Bakers AA Castor Oil Klotz Techniplate Racing Oil protect expensive engines finest quaiity fuel can made price Dont take word try some judge yourself l See dealer first available order direct Call ri 800-247-5008 toll free orders Latest Catalog $300 ~LJ SIG MANUFACTURING CO Montezuma IA 50171 Prices sutitect chanee notice Hands Off Cut II Especially Designed Tapered Wings HANDS OFF CUT II unique device cutting high quality foam wing cores hands off also cuts both sides same time Most modelers will amazed high quality smooth surface will achieve using device plus added advantage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam components such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble s approximately 15 minutes Dealers Wanted Hands Off Cut II Hardware Pkgl $8750 plus $3 ship ft hand 24 Volt Variable Output Power Supply$5250 pius $3 ship ft hand //5 NORRAY PRODUCTS INC __________ 5008 Sandbeach Road Wichita Falls TX 76310 Tel 81716924475 VISA 11 oversimplification key question being whether kinetic energy momentum inertia whatever relative earth indicates air prefer go latter interpretation Aside saw good pilot bring big MAN Monocoupea fine modelover fence against strong wind slightly dip tip recover quickly nice go-round 360 entering approach again downwind fell like stone pilot Quarter Scale expert recovery 360 continued direction slightly dropped wing back over fence out good wind old approach path what considered enough added power flying Mono relative earth safe eye needed much power airspeed wider recovery pattern what appeared ade quate reader wonders about years old Kougar doing same thing excellent plane Another lost Stolph Starlet same way though crack flier asks have clues common denominator dreaded downwind turn opposing viewpoints will probably never reconciled Example two aero engineers high-time pilots expert model fliers pursued debate bitter end have files access finest scientific brains organizationsand mean biggies team least six organizations proved its case disproved others What think Ken just published thorough article math Thermalist newsletter Soaring Society East Tennessee sup posedly settles matter Kens words article proved yer takes yer cherce always kinetic energy relative ground key factor downwind furor Ken trotted out box car scrambled poor brain box car travels down track speed matching wind speed flies Indoor model constant 360s airspeed model 20mph Its speed inside box car traveling downwind 20mph flies against wind zero relative ground As circles downwind airspeed 40 mph 20mph relative moving car Ken asks Does model climb going against wind lose altitude downwind expected kinetic energy relative ground speed air nightmare true box car jerked instantaneous stop jerked instantly 20 mph again Didthe circling model remain center car dreams have meaning seeing circle Control Line lower wing tip center earth Since model banked turn its wing loading highertrue things fly tightlybanked Spitfire stalls 250 mph Still fog imagined model flying around pylon CL fashion being gravity Does matter box car goes Now half awake realize two things box car en capsulated box air model being Free Flight subject full range ac celeration/deceleration results RC control inputsthat pilot errors Does Kens model know upwind downwind within its moving encapsulated chunk still air sure dont know Note Ken does discount kinetic energy asks rather think relative ground air choice words suggests thinks relative air think him correctbut am Kinetic energy involves mass speed flying machine no kinetic energyno tenContinued page 26 24 Model Aviation ALL PURPOSE FOAM CU1TER POSI CURE CYANOACRYLATE SPECIAL INTRODUCTORY OFFER List Sale Savings 1 oz Fast Cure 3-5 Sec495$2450% Off 2 oz Fast Cure 3-5 Sec895$39656% Off 1 oz Gap-Filling 5 Sec495$249500/a Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied P051-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 2514789 SHIPPING Out State INFO 408 251-0787 Californiaper order Hour Mon-Wed Fr & Sat 930-530 FAST SERVICE 930-900 1200-500 COD ADD $190 dency remain motion maintain direction resist changes direction certainly would affect flight path plane could fly flying machine possesses no kin etic energy airspeed balloon zero wind stabilized fixed altitude Considerthis too An unintentional spin entry usually deadly snap differs inten tional spin entry plane slowed level flight stall occurs rudder jammed direction wanted spin accidental spin can entered out bottom over top Modelers say wing outside circle traveling faster therefore spin out bottom slower-moving wing quits Yet snaps over top training over-the-top entry executed maintaining slightly banked climbing turn top wing quits eventually Cub will roll over top entering spin right what left climbing turn suspect reason tad down aileron required maintained left climbing turn washin condition whereas slower lower wing its slight up aileron has washout course neutral ailerons present much normal flying would probably see over-the-top entry unless plane steeply banked high-speed turn time have seen model snap under such conditions over topsuch 09-pow ered little Scale foamie racked around too far downwind three-channel ship aileron position factor true downwind turn back wind pilot always yelled interference High-speed secondary stalls un known vast majority modelers Years ago Cdr Green invented stall warning indicator interviewed him Interavia fourlanguageeditionsSwiss aero journal partial stall Bonanza recovery horizon plenty power level flight reestablished ship feeling solid flew straight out good indicated airspeed after lapse seconds warning indicator intoned series tiny beeps plane stall region Obviously still power required Until side other gives up sin openminded comes air ocean genesis debate know models conformprobably because comparable condi tions necessary laboratory situation cannot created Hands now no flying moving aircraft carrier proof recently print Einsteins train inside Kens box car calm air Ive set up lightlyloaded low-powered craft perform 360s 720s hands off no changes altitude wind always lose altitude downwind side regain upwind flight circle tilted disk Proves nothing guess view Kens question whetherthat altitude loss due kinetic energy relative ground speed earthor air What see easily rubber good breeze wind strikes underside plane begins its hoped-for 360 low power high-pitch prop its climb poor nonexistent downwind leg prop slows down seems flail air airspeed obviously off though ground speed may great coming around wind plane will zoomespecially flat-bottom foil rpm picks up toowhich sometimes re sults stalls whip stalls Lift appears tremendously maguified point Continued page 128 26 Model Aviation ROUSH KITS TaylorCraft Full span 108 Area 1670 clipped 84 Area 1300 Power 75 12 Cu Oalaa&PIy 10-l2lbe $11996 Super Sport 120 Span 73 Area 960 Power 75 12 Cu Ifl $9996 Super Kwik Fli Span 70 Area 927 Power 75 12 Cu Ifl $8996 Two Ugly Stick Span 70 Area 1290 Power 75 12 Cu $9995 Jr Sticks Span 72 Area 1080 Power 75 12 Cu $7996 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1728 Dywood St SE Canton Ohio 44707 2144644610 THE LEADER IN COMPETITION PROPELLERS NEW 4 CYCLE SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHELATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 12 66A778 299 136778379 146778479 1567689 16678989 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 53/i34149 634149 72833A456179 83344568189 8/4566A7199 94566A77199 104566A7209 106W8W209 106EW219 114677778229 115W229 116EW239 11I67239 124W279 125W279 1256279 1356349 1456459 1556659 164AN969 16678969 RO PYLON RACING SERIES 500 DIAPITCHPRICE 7SN 5N279 8I67/7I8299 SERIES 400C 8/66777289 9777289 W WIDE BLADE EW EXTRA WIDE N NARROW cssI coazr tNDED Safety/Preston Continued page 16 Balsa knives Up point months column has offered advice us build internal-combustion engine-powered models As postscript comes safety message Scale Staffel newsletter should interest modelers came way Bill Winter author Just Fun column magazine Some five years ago reported incident also relayed via Bill concerned modeler bled death after cut himself leg balsa knife knives can hazardous Consider following tip Scale Staffel newsletter editor dont know name JP hobby knife quietly roll off work bench drop lap bury entire length blade right inner thigh bad news wound got infected very painful good news did land mere two inches left 25 cents could purchase cheapest surance life sketch accompanied Scale Staffel newsletter safety tip showed soft vinyl triangular-shaped sleeve handle knife Apparently can obtained sta tionary stores about 25 50 cents tended slipped onto pencils prevent rolling off tables desks etc claimed such sleeve does interfere use knife may actually help grip handle Have safe month John Preston Model Aviation 1810 Samuel Morse Drive Reston Virginia 22090 Plane Talk/Winter Continued page 26 fly rudder-only RC jobs know can lose downwind out sightunable penetrate after downwind turns down wind portion circle sideways drift lightweight ship revealed wind blowing against top plane Such changes display wind airspeed changing relative other points circle since wind relative wing changing angle attack kinetic energy involved know upon turning wind plane can slow abruptly some reason go climb Dealers Distributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC P 0 Box 2136 Fan-tax Vrgnia 32031 U 5 stall As varying airspeed 360 model find certaln three-channel RC models slow respond rudder downwind sideso much some like Rebel can barely brought back wind rudder action powerful Airspeed over rudder going downwind less no argument therefore less over entire plane including wing plane must accelerate downwind leg malntaln its original speed relative wind So its obvious eye wind time sorta blowing model along say Get out way two Gordon Light Rubber Commer cialsa sport version Wakefield winner flew beautifully gentle wind strong wind always spiraled ground downwind segment circle added dihedral problem vanished no way Rebel GL model could blissfully drifting air ocean Suppose wind As Gordon Light model banks front you see its top dihedral has the top wing see less see lower wing ridiculously large dihedral would see wind large expanse upper wing little nothing lower wing other extremethat no dihedral assuming model banked verticallyyoud see equal area both upper lowerbanked wing know model condition could roll out its own drifting downwind speed match force wind definitely impervious influence wind since blithely floating air ocean aerodynamic soul leave ponder resulting relative wind airfoil both wingsand conse quently whatever angle attack exists model pursues its circular path constantlychanging relative wind increments years experience Don Srull have learned question nothing says scientist par excellence experienced aero nautical engineer constantly-winning modeler varied events Anything I better innocent comments man thinks like model believe pro asr ocean says what see what top cites Hewitt Phillips NASA did definitive analysis would bible subject Hewitt genius knew Indoor days early Thirties cannot argue Phillips says Don proved what see can take place backside gust think what see lightweight turning out wind precisely Hewitts gust condition effect model has created its 128 Model Aviation ao 10SASIFLIIIIG 13S.AAJ AZRCA L16BdhJa LIA5cN uaWpan 8 Luah. poem 6O 90 cun wiagapan 8 1uca power 2 ou L2R FOoT PLAN S1SZOOOZL TGLASS CL3SZOoOlL add 10% hiv A0 PLLZIS N PANTS PO 3 939 ZAH 11 11760 1 716 727O Classic U/C Scale iII sGRATL~ 40 Wing 15 25 Engines 5 0 IL SOMETHING NEW & BETTER! THE uii CWfWVTPf4 SPORT/TRAINER SIMPLE TO BUILD EASY TO FLY TRAINER -ORBUILD IT WITH AILERONS AND DO IT ALL OR WITH 05 ELECTRIC MOTOR 48 SPAN SQ IN 43 OZ SELECTED DIE AND MACHINE CUT BALSA AND PLYWOOD COMPLETE ROLLED PLANS STEP-BY-STEP INSTRUCTIONS ALL HARDWARE AND FORMED GEAR FLY WITH 20 FOUR CYCLE ENGINE ASK YOUR DEALER own back gust world dare say turns chases wind Turning wind effect creating gust-like environment head Its kinetic energy has converted something What really downwind turn way As Ken says downwind upwind has killed hundreds people can kill model go round float force bit dont bring up power youd expect strong wind Before war newly-soloed pilots some commercial guys 250 hours flew lightplanes over homesteads girl friends houses strong wind Theyd bank nicely wind gradually keep forcing circle rudder order see house gal simultaneously trying flatten angle bank ailerons cross controls theyd spin terrible mysterious problem until Leighton Collins explained great little magazine Air Facts As beginner wrote couple humble pieces him son editor Flying believe Argue among yourselves Dont bother pros cons share Willards comment Hey fellows lets knock off Just lets say some will lose altitude some wont will go out limb planes drift downwind Half-empty half-full glasses thats air oceanfor models anyway Bill Winter 4432 Altura Ct Fairfax VA 22030 Radio Technique/Myers Continued page 39 simultaneously order get some protection guy turns checking other users channel same scheme simultaneous use two RC channels imple mented way two parallel independent operating systems can also protect us disastrous consequences simple failures like battery exhaustion having battery antenna wire break pretty common occur rences Calvin Orr Custom Electronics recently loaned prototype Error Switch Normally Calvin supports simultaneous use two different bands such 50MHz 72 MHz goal investigate simultaneous use two 72 MHz frequencies Calvin says simultaneous use two 72 MHz channels including Error Detector switch ing can performed today minor modifications presently-available equipment already done Airtronics AM equipment using modified buddy-box connec tion Stage 2 tests Error Switch loaned came equipped 19 Airtronics connectors cheap way todays prices can buy two complete systems simply add Error Switch modified buddy-box cable join complete Redundant Radio system outlay $500 About Error Switch airborne Error Switch $149 item comes two flavors AM FM prototype AM type Error Switch samples both receiver outputs shuts down whichever receiver suffering inter ference FM version has bit sophisti cated order take care FMs capture Continued page 132 NEW FOX 4CycIe Special MIRACLE GLOW PLUG totally new concept glow plug design Instead using idle bar MIRACLE PLUG built pre-cotubustion chanther important thing plug retains heat better other know Try . 4-cycle motor 2-cycle motor also will get smoother throttle reslonse lrolably will able use less exlensive low nitro fuel Tests also show reduced fuel consumption cases WARNING motor Irobably will idle faster reset throttle erwise might able land Hard believe . course check out MIRACLE PLUG Just case 40702 4-Cycle Glow Plug $275 Manufacturing Company 5305 Towson Avenue Fort Smith AR 72901 October 1986 129 I DAVEY EMS CORPORATION E WOOD LANE MALVERN PA 19355 215 644-6772 dant-channel usage should able use two RC channels
Edition: Model Aviation - 1986/10
Page Numbers: 18, 19, 20, 21, 22, 24, 26, 128, 129
7Bill Winter~ LI________ Plane TaIL THE AVERAGE AGE 105000-plus AMA members 39 two years higher 1978 last curious Before anyone goes flap am Chicken Little sky falling never told nine kids must eat spinach cause its good know average age modelers has rising over 50 years since began 1927 ModelAirplane News 1929 kids gen eration identified Lindythe romance daring World War aces glamour early barnstormers Standards Jennies heroic air mail pilots like Jack Knight landed emergency fires auto headlights saw American Boy its plans Twenties-style appeal 300000 members AMLA preceded AMA starry-eyed Nationals trip prizes Olympics grew up wave modeling progress always complicated expen sive age curve really rose RC rich mans hobby Consider dollar volume aeromodeling industry today roughly $500000000 average member 39 yet born time already bewailing lack kids Relatively few us know another world exists Through entirely different outlets barely notice millions ROGs gliders other things sell substantial market thats around half century am reassured letters young people So much asked computer breakdown membership discovered have 11000 group under 19 smart cookies believe manage well things older folks also enjoy know put words thoughts together just finished building TD Coupe reports Mike OBryan 16-year-old What ask TD Coupe dont ask Mike appeared long ago MAN thought niftiest gassie see print Old-Timer designed Theodore Dykzoelwhere TD comes fromin 1936 graceful Old-Tim ers two factors consider before building Old-Timer continues Mike First foremost must pretty cause dont like aint gonna build Second like design isnt done very often ship fits both criteria first humbling effort covering silk although doubt will last yard white polka dot silk hobby shop has sitting bottom box since Wright brothers flew Kitty Hawk Im sucker fun crazy color schemes see two photos TD Coupes the left being Mikes other dads twist Young Mike covered silk dad preferred MonoKote Pop used fiberglass cowl Mike made balsa split middle access Mike blew up plans original 630 sq 900 Mikes silky aimed 60 oz caine out 64 K&B 40 SAM Society Antique Mod elers competition loading mere 1024 oz/sq ft Pops iron-on ship hit 12 OS 60 four-stroke Mike asked Pop would quicker trim spraying hand-painting told should take too long mask off hand-paint took Mike month paint sand trim Mike jokes dads 12-oz-loaded job proverbial lead sled loading similar Kaydet Sr makes Mike wonder Senior can soared expect Kaydet Sr soar fairly low-aspect wing mind ramble little Mike asks have something get off chest issue Junior problem Granted AMA card says Im Senior think am qualified enough give point view other side fence Mike have undivided attention column always melts down some place age instant gratification Mike advises us have fast foods drivethrough tellers banks commercial jets travel faster speed sound can get halfway across world matter hours overnight mall one-hour film processing super glues set seconds frozen foods get picture Whenever show friends hobby first comment make dont have patience fact some think Im crazy because cant imagine spending time building have possibility its being wiped out matter seconds Something else modeling fraternity has nt considered type young people hobby tends attract Generally athletic types have free time wrapped up organized sports therefore non-athletic likely participate hobby generalization isnt always true because other minor RC club 300 both engaged sports during school year other diversions like home computers people have days TV has infiltrated 99% American homes people have writing articles concerning problem blame cost dont really think problem because generally kid wants something hell save money until has enough Usually son daughter shows genuine interest something parents will help back financially Obviously hobby doesnt need expensive much does take make Control Line matter simple chuck glider usually kid thinks model alrplanes conjures up images expensive RC type am fortunate enough have father involved can honestly say pay about 90% hobby expenses through lawn mowing jobs have summer kids out have patience willing learn May relate experience couple years ago During summer sometimes get bored pass time Ill make chuckie fly front house until lands roof time made proved better flier anticipated None gliders ever great performance would stay up about seven seconds before crashing ground So took littie brother two chuckies over local grade school got eft Sixteen-year-old Mike 0Bryan enlarged plans TD Coupe 1936 MAN tram 630 900 sq TorSAM competition K&B 40 silk covered brush trimmed has split balsa cowl Hes designing 9-ft Ryson K&B 19 some 25 Claude Ryans elegant power/soarer retirement joy Right dad MonoKoted TO dont guys have covering preferences reversed 05 60 four-stroke power Mikes 64-oz beauty hess 1024 az/sq ft wing loading dads 12 oz Mike jokesthat itisa proverbial lead-sled 18 Model Aviation about eight nine years old romping around immediately gathered around started flying Three got bored after 15 minutes went back roughhousing stayed totally fascinated taught him throw correctly spent next two three hours throwing little chuckie around schoolyard didnt lose interest wings broke off wait 20 minutes Testors Green Tube cement back never saw kid again mistake because responsibility follow up Au Reminds Delta Dart promotions What Im trying point out kids Out up us find name Chris Register live Stone Mountain GA writes another upbeat young guy sounds running president have model aviation enthusiast since eight years old Au Now did get started am now 18 engineering student De Vry Technical Institute Decatur see other modelers have sent photo graphs have shown short write up Au positive approach am sending some photos recent project Gold berg Sky Tiger powered HB 40 ample power Believe actually flew slang word vocabulary skulter through whole Turnaround pat tern glitch bit sloppy maybe couldnt get flat spin satisfactorily chopped six inches off wing Man watch out Now its hard keep out em really admire old-timers keeping sport alive people like Au think means uns like dont think model aviation will ever die Thats about dont want take up too much flying time own philosophizing point out young guys dont instantly lock onto thing youll note Chris Comet T-Craft rubbe- job picked up three years ago K-Mart $159 Flies great says Chris urse.. Kids us am 70 years old have enjoyed building flying models ever since put plans old Boys Lfr John Van Ryzin checks Au John could have American Boy Milwaukee Journal used publish plans rubber-powered models Au Both Scripps-Howard Junior Aviators Hearst Junior Birdmenpapers big modelingprograms Remember old Aframe twin pushers made winders old egg beaters Lots fun Carved own left- right-hand props Au did some fun got RC retired married children gave Sanwa two-channel Andrews H-Ray What leaming experience powered Enya 15 III Control Line engine thought because flew Waco biplanes Stinson Trimotors full-scale ones flying model radio control leadpipe cinch 65 hand-to-eye coordination greatest conquered Au full-scale pilots have terrible time AC say miss feedback get seated cockpit overcontrol left-right nightmare versatile pilot know scares daylights out himself bystanders Tele masterwhich willfree flight its own dont bother stick whomping cure get up about 300 feet accept soothing words understanding low-key instructor stupid enough say give left right up down blows mind too fly straight lines back forth low power until find faith machine yourself get left-right stuff overcontrolling out system flew Control Line Stunt Combat well took 52-ft cables anchored CG cabin installed cable guide end wing flew H-Ray off schoolyard parking lot like CCW Control Line used spare tire car unimpressive pic rubber-powered T-crafttickles Winterto no end Chris says Comet Taylorcraft picked up local K-Mart $159 Its great flier too second airplane Sterling Citabria Chris states old can build like loved plane skills refined enough back fly very well Yes bitthe dust Young old theres lesson there. someplace adapter located center wheel adapter 1-in pipe center 3-fthigh broom handle mast top ofthe mast eight-penny nail could loop Du-Bro line connector over center pivot used stones weight tire would slip high speed centrifugal force made hundreds takeoffs landings Heres baby says 18-year-old Chris Register Goldberg Sky Tiger powered HB 40 unreal performance finally learned sustained inverted flight Winter says Chris later chopped off 6 span could inverted spins Heres Chris 14 Pilot GB 40 built friend Surprised him flew great Winter says 14 didnt know what ROG took him 30 years try fly things like Chris bomb Left This Antic still flies great 05 60 four-stroke after six years Right Lufberrys Nieuport has authentic instruments French complete cockpit folding gun rigging perthe original Shown OS 60 four-stroke Williams Bros LeRhone miniature Now has 05 90 four-stroke bar-stock LeRhone dummywe suppose needed additional nose weight power Actual size stated Let Scratch-built Aviantiker 0-3 part Antic part Aviatic part Rumpler Slow graceful OS 60 four-stroke Winter says Al should allow out night Right Dennyplane OS 40 four-stroke Takes off half-throttle cruises just above idle Au Evidently means Radio Control until gained enough courage let H-Ray go put small amounts fuel limit engine run no throttle control landing ending deadstick sure learns land way Happy day no crackups thought Id share idea anyone cannot get instructor help works fine ifyou have flown Control Line lot Any way can own first RC flight landed runway Walt Schroder hand-launched beast 7-ft 1947 RC Special rudder four-arm Good brothers escapement no throttle its Ohlsson 60 big stab hit Wait back head kept goingno Walts head talked out loud way landed huge argument over whether free-flighted piloted about loud bumping noise coming transmitter Walt couldnt hear itthough sounded like drum heart prepared flight Waits hold ing big ship aloft country kitchen calling maneuvers worked rudder innocent didnt know enough turn off escapement switch drove 60 miles next day find Ed Lorenz explained consequent mystery dead batteries too pilot never affected attempts fly RCone mans meat is.. Van Ryzin really wrote tell us about clever conversion Eaglet didnt know John Hunton did Screamin Eagle article August 1984 issue Model Aviation last T Ze Flying Circus Albert J Ward another ubiquitous Californian makes feel like blindfolded kid trying pin tail party donkey says model building led directly lifelong career never regretted moment it still fun Hes finished Sterling Ste arman powered OS 90 fourstroke spent three Navy years overhauling Stearmans Staggerwing Beechcrafts NAS Glenview weve few Nats hes added details can remember Spread beside display color photos wondrous variety intriguing ships say least reflect lifetime love affair character subjects hope get withjust few examples pleasureincluding Dennyplanewhich what will write about Due recent columns am flooded Dennyplanes said Midway kit fleet Telemasters spoilers carrying gliders go fly Sunday may encounter 25 Telemasters half spoil ers half gliders topand some both well flaps spoilersand perhaps 20 Model Aviation pictures page just part Al Wards Squadron Left OB 60 monster 0S 90 four-stroke provides air borne launch Marks Models Wanderer Spanning 82 has servo-operated hatch dropping whatever Above No3 Martin Handasyde version French Antoinette 9/48 scale spans 73 0S four-stroke shown now has Salto 45 four-stroke Lateral con trol provided bywing warping King postsand wires galore sprung wire-spoke wheels nose-over skid brasstank radiators pilot 10 Dennyplanes few zooted up ailerons less dihedral get picture Actually Ward gave 4-K kit friend summer vacation surprise friend presented Al ajewel fall framed ready go Al installed OS 40 four-stroker three-channel grossed 4 lb takeoff Gremlins tossed him series glitches resulting series sharp nose-up-and-down undulations high-G roller coaster wing snapped ird zig Kapow bears discussion first let Al tell paid much attention center section already framed up checked drawings built exactly plans entire frame glued Titebond Au think means OK Apparently wing plan shows wing Reginald Denny -even ers mi capal lion ir J wr igr designed strong enough added stresses weight RC flying recom mends future Dennyplane pushers beef up dihedral joints add webbing front spar least halfway out able salvage bird replacing beautiful engine cowl Au lovely cowl seems fascinate us aluminum panworks fine Denny flies just fine slow stable quick take off slow landing Takes off about half throttle cruises just above idle Au Thats fun-perfect tf under powered dont want ha twothirds throttle max takeoff OldTimer Should beef up Denny know will never break wing Old-Timer because fly gently through open loops wish snaps etc Id carry something extra out least one-third semi span across centerline lightly-built design balsa spars absolutely no penalty much insurance substituting same size spruce spars Id stab spar Id build Denny unmodified except Al has described concerns flat-bottom wings possibility radio malfunction would duplicate Als experience Broken wings common RCs early wi lere now eping c alre othy Ott sougn ked afteri nt ughnut shops d Doi rica Cai Banif everyw ould sc imore ing g agian say Hal all flat-bottomed phugoid pitching can fatal Guys would nose over dive pass vertical pull Out elevator killed Lincoln Beachey point exe cute vertical S try enter inverted half outside can flat-bottoms attain sustained inverted abort panic pull sharp split-S varying loads flat-bottom wing flown verge catastrophic youll need spruce sparsand webbing way out Doc Mathews keeps preaching Ive beenhackingbalsawoodsince 1932 am still trying get right comments too modestly Im retired United Airlines After 40 years full-size maintenance can now devote time smaller ones flies Bay area sites getting problem weather permits year-round flying first successful Free Flight inverted Gwinn Aero placed far down 1940 Nats Bantam-engined third-placer 1949 Plymouth Internats still alive sure does have time little ones including OS 40 four-stroke Flying Quaker Super Cyke Buzzard Bombshell Electric Play boy Viking Also Antic sorta-bipe Antic Top Flite J-3 Proctor Nieuport ye Continued page 22 October 1986 21 Sans spinner pic Winters new electric Heron 565 sq area has Robbe/Mabuichi motor cabin extension drive big Robbe folder Does 15 20 mm before dusk three trips max altitude six seven winch tow height Gear removes has yet flown way Has eight 1 2s 075 motor Draws 16 amps static though 28to 35 amps have reported others using com parable setups prop Schmitt pic 1-mm charge Ni-Cd booster Don Srull gets 2 mm FF Pietenpol powered tiny M RC FF electric motor two 100 mAh cells Williams plastic prop plane bigger outdoor CO-2 less fuss Field limits charge Schmit pic See anything different Gordon Stahls Gee Bee Bright red-and-wfllte scneme painted Used Aero Span Balsa USA Missing stab uses Evans/Simitar airfoil Get lust Plone emphasis product rather production Bob Godfrey Precision Built Models Kits creates custom planes very particular customers 1 / 3 scale Laser 200s built Tournament Champions evolved / 3 1 / 4 scale kits newest kit Phoenix 9 continues high standards Precision Built Models previously achieved Bob always striving improve Laser Kits Built Wings Laser Built Bones product building techniques both practical innovative Bob always willing give building engine advice anyone calls case repairs needed may purchase single wing fuse wood parts need Precision Built Models get just kit get service Bobs planes becoming popular planes fly 1/3 1/4 $ 35000$ 22900 6750037500 Laser CoveredBud Light Decals9500050000 Ready Fly eng & Radio Instal12000075000 Universal Receiver Battery Packing Sleeves Ties $250 Phoenix 9 complete kits $15995 Built up prices same 1 / 4 scale Laser Plans parts available Freight included Direct Sales Only P~c-Iskiin Haul Bob Godfrey/ 1818 6th Ave W Bradenton Florida 33505 813-747-7006 gods Martin-Handasyde like Antoinette Falcon 56 Headmaster 40 Q13 60 Monster Dennyplane Jr original Bantam FF Mini-Hogan FF rubber-powered Midwest Gol lywock Comet Sparky coupis Pea nuts .. Ken Willard dont box car column dreamed about Ken go back long way wed talk New York hotel room waited midnight Connie Sleeper LA Hes forgotten about air planes Ill ever know dont argue him seems Ken once published someones analysis claiming prove plane turning upwind downwind 180 will lose altitude Mine always did letters over world can believe own experience Id bet came textbook theorists no hands-on experience Note although plane turned into-thewind path downwind direction Ken did designate infamous killer downwind turn nor reference far fact plane trimmed cruise cruise poweror glider will loses altitude turning out wind will regain coming back wind assuming handsoff stable requires no interfering control inputs Ken told guys bug off like debate over angels can dance head pin paper chase went onand Ken almost lost cool July RCM lets leave Ken fascinating column hold.. want trombones hoary debate drips mossy tendrils definitive confrontation tween authorities took place Flying years ago Results Yer pays money takes yer cherce call basic syndrome Air Ocean pro air ocean theory postulate turning airplane part drifting air mass impervious outside inputs Usually airliner etc pictured 360 over say Pacific say 30000 ft youll never notice anything either aone ortwo needle-width turn heavy fast airplane since its airspeed relative wind encounters far cry model airspeed may compete wind half equal bad day alight moderately-powered plane its velocity plane really impervious its 360 true circle its 360 flight path has elongated downwind abbreviated upwind legs its related ground path naturally much distorted eye earthbound viewer may things wonder about tight 360 performed Cub 50 mph wind much comparable models making hands off 360 same wind Hands off means no control inputs used Entry requires gentlest inputso lets assume second 360 720 years pros said nothing about inertia kinetic energy cons claim factor Both sides argue whether changes direction influenced momentum cons say moving mass will tend continue its already-established direction argue results reduced airflow over wing downwind portion circle hence lowered airspeed consequent change angle attack leading nefarious down wind turn shenanigans ie downwind wind have caused full-scale plane well model fall out air Below will find that Ken shows Continued page 24 22 Model Aviation * Special Detergents help prevent varnish promote clean burning * Rust Preventatives protect expensive engines corrosion SIG CHAMPION 2-STROKE FUEL FREIGHT FREE SHIPPING ON ORDERS OVER $1500COLLECT PINTQUARTGALLON55 GAL DRUM 0% Nitromethane$315$450$1050$19000 5% Nitromethane$365$525$1250$25800 10% Nitromethane$415$550$1450$32500 15% Nitromethane$430$625$1650$38500 25% Nitromethane$495$750$2095$52000 35% Nitromethane$575$875$2495$66000 SIGPREMIUM4-STROKE FUEL 10% Nitromethane$415$550$1395$29500 15% Nitromethane$425$625$1595$35900 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending fuel finest quality ingredients available alcohol 995% pure very best grade available nitromethane use 100% pure get honest portion based % volume maximum lubrication get perfect 50/50 blend Bakers AA Castor Oil Klotz Techniplate Racing Oil protect expensive engines finest quaiity fuel can made price Dont take word try some judge yourself l See dealer first available order direct Call ri 800-247-5008 toll free orders Latest Catalog $300 ~LJ SIG MANUFACTURING CO Montezuma IA 50171 Prices sutitect chanee notice Hands Off Cut II Especially Designed Tapered Wings HANDS OFF CUT II unique device cutting high quality foam wing cores hands off also cuts both sides same time Most modelers will amazed high quality smooth surface will achieve using device plus added advantage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam components such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble s approximately 15 minutes Dealers Wanted Hands Off Cut II Hardware Pkgl $8750 plus $3 ship ft hand 24 Volt Variable Output Power Supply$5250 pius $3 ship ft hand //5 NORRAY PRODUCTS INC __________ 5008 Sandbeach Road Wichita Falls TX 76310 Tel 81716924475 VISA 11 oversimplification key question being whether kinetic energy momentum inertia whatever relative earth indicates air prefer go latter interpretation Aside saw good pilot bring big MAN Monocoupea fine modelover fence against strong wind slightly dip tip recover quickly nice go-round 360 entering approach again downwind fell like stone pilot Quarter Scale expert recovery 360 continued direction slightly dropped wing back over fence out good wind old approach path what considered enough added power flying Mono relative earth safe eye needed much power airspeed wider recovery pattern what appeared ade quate reader wonders about years old Kougar doing same thing excellent plane Another lost Stolph Starlet same way though crack flier asks have clues common denominator dreaded downwind turn opposing viewpoints will probably never reconciled Example two aero engineers high-time pilots expert model fliers pursued debate bitter end have files access finest scientific brains organizationsand mean biggies team least six organizations proved its case disproved others What think Ken just published thorough article math Thermalist newsletter Soaring Society East Tennessee sup posedly settles matter Kens words article proved yer takes yer cherce always kinetic energy relative ground key factor downwind furor Ken trotted out box car scrambled poor brain box car travels down track speed matching wind speed flies Indoor model constant 360s airspeed model 20mph Its speed inside box car traveling downwind 20mph flies against wind zero relative ground As circles downwind airspeed 40 mph 20mph relative moving car Ken asks Does model climb going against wind lose altitude downwind expected kinetic energy relative ground speed air nightmare true box car jerked instantaneous stop jerked instantly 20 mph again Didthe circling model remain center car dreams have meaning seeing circle Control Line lower wing tip center earth Since model banked turn its wing loading highertrue things fly tightlybanked Spitfire stalls 250 mph Still fog imagined model flying around pylon CL fashion being gravity Does matter box car goes Now half awake realize two things box car en capsulated box air model being Free Flight subject full range ac celeration/deceleration results RC control inputsthat pilot errors Does Kens model know upwind downwind within its moving encapsulated chunk still air sure dont know Note Ken does discount kinetic energy asks rather think relative ground air choice words suggests thinks relative air think him correctbut am Kinetic energy involves mass speed flying machine no kinetic energyno tenContinued page 26 24 Model Aviation ALL PURPOSE FOAM CU1TER POSI CURE CYANOACRYLATE SPECIAL INTRODUCTORY OFFER List Sale Savings 1 oz Fast Cure 3-5 Sec495$2450% Off 2 oz Fast Cure 3-5 Sec895$39656% Off 1 oz Gap-Filling 5 Sec495$249500/a Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied P051-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 2514789 SHIPPING Out State INFO 408 251-0787 Californiaper order Hour Mon-Wed Fr & Sat 930-530 FAST SERVICE 930-900 1200-500 COD ADD $190 dency remain motion maintain direction resist changes direction certainly would affect flight path plane could fly flying machine possesses no kin etic energy airspeed balloon zero wind stabilized fixed altitude Considerthis too An unintentional spin entry usually deadly snap differs inten tional spin entry plane slowed level flight stall occurs rudder jammed direction wanted spin accidental spin can entered out bottom over top Modelers say wing outside circle traveling faster therefore spin out bottom slower-moving wing quits Yet snaps over top training over-the-top entry executed maintaining slightly banked climbing turn top wing quits eventually Cub will roll over top entering spin right what left climbing turn suspect reason tad down aileron required maintained left climbing turn washin condition whereas slower lower wing its slight up aileron has washout course neutral ailerons present much normal flying would probably see over-the-top entry unless plane steeply banked high-speed turn time have seen model snap under such conditions over topsuch 09-pow ered little Scale foamie racked around too far downwind three-channel ship aileron position factor true downwind turn back wind pilot always yelled interference High-speed secondary stalls un known vast majority modelers Years ago Cdr Green invented stall warning indicator interviewed him Interavia fourlanguageeditionsSwiss aero journal partial stall Bonanza recovery horizon plenty power level flight reestablished ship feeling solid flew straight out good indicated airspeed after lapse seconds warning indicator intoned series tiny beeps plane stall region Obviously still power required Until side other gives up sin openminded comes air ocean genesis debate know models conformprobably because comparable condi tions necessary laboratory situation cannot created Hands now no flying moving aircraft carrier proof recently print Einsteins train inside Kens box car calm air Ive set up lightlyloaded low-powered craft perform 360s 720s hands off no changes altitude wind always lose altitude downwind side regain upwind flight circle tilted disk Proves nothing guess view Kens question whetherthat altitude loss due kinetic energy relative ground speed earthor air What see easily rubber good breeze wind strikes underside plane begins its hoped-for 360 low power high-pitch prop its climb poor nonexistent downwind leg prop slows down seems flail air airspeed obviously off though ground speed may great coming around wind plane will zoomespecially flat-bottom foil rpm picks up toowhich sometimes re sults stalls whip stalls Lift appears tremendously maguified point Continued page 128 26 Model Aviation ROUSH KITS TaylorCraft Full span 108 Area 1670 clipped 84 Area 1300 Power 75 12 Cu Oalaa&PIy 10-l2lbe $11996 Super Sport 120 Span 73 Area 960 Power 75 12 Cu Ifl $9996 Super Kwik Fli Span 70 Area 927 Power 75 12 Cu Ifl $8996 Two Ugly Stick Span 70 Area 1290 Power 75 12 Cu $9995 Jr Sticks Span 72 Area 1080 Power 75 12 Cu $7996 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1728 Dywood St SE Canton Ohio 44707 2144644610 THE LEADER IN COMPETITION PROPELLERS NEW 4 CYCLE SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHELATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 12 66A778 299 136778379 146778479 1567689 16678989 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 53/i34149 634149 72833A456179 83344568189 8/4566A7199 94566A77199 104566A7209 106W8W209 106EW219 114677778229 115W229 116EW239 11I67239 124W279 125W279 1256279 1356349 1456459 1556659 164AN969 16678969 RO PYLON RACING SERIES 500 DIAPITCHPRICE 7SN 5N279 8I67/7I8299 SERIES 400C 8/66777289 9777289 W WIDE BLADE EW EXTRA WIDE N NARROW cssI coazr tNDED Safety/Preston Continued page 16 Balsa knives Up point months column has offered advice us build internal-combustion engine-powered models As postscript comes safety message Scale Staffel newsletter should interest modelers came way Bill Winter author Just Fun column magazine Some five years ago reported incident also relayed via Bill concerned modeler bled death after cut himself leg balsa knife knives can hazardous Consider following tip Scale Staffel newsletter editor dont know name JP hobby knife quietly roll off work bench drop lap bury entire length blade right inner thigh bad news wound got infected very painful good news did land mere two inches left 25 cents could purchase cheapest surance life sketch accompanied Scale Staffel newsletter safety tip showed soft vinyl triangular-shaped sleeve handle knife Apparently can obtained sta tionary stores about 25 50 cents tended slipped onto pencils prevent rolling off tables desks etc claimed such sleeve does interfere use knife may actually help grip handle Have safe month John Preston Model Aviation 1810 Samuel Morse Drive Reston Virginia 22090 Plane Talk/Winter Continued page 26 fly rudder-only RC jobs know can lose downwind out sightunable penetrate after downwind turns down wind portion circle sideways drift lightweight ship revealed wind blowing against top plane Such changes display wind airspeed changing relative other points circle since wind relative wing changing angle attack kinetic energy involved know upon turning wind plane can slow abruptly some reason go climb Dealers Distributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC P 0 Box 2136 Fan-tax Vrgnia 32031 U 5 stall As varying airspeed 360 model find certaln three-channel RC models slow respond rudder downwind sideso much some like Rebel can barely brought back wind rudder action powerful Airspeed over rudder going downwind less no argument therefore less over entire plane including wing plane must accelerate downwind leg malntaln its original speed relative wind So its obvious eye wind time sorta blowing model along say Get out way two Gordon Light Rubber Commer cialsa sport version Wakefield winner flew beautifully gentle wind strong wind always spiraled ground downwind segment circle added dihedral problem vanished no way Rebel GL model could blissfully drifting air ocean Suppose wind As Gordon Light model banks front you see its top dihedral has the top wing see less see lower wing ridiculously large dihedral would see wind large expanse upper wing little nothing lower wing other extremethat no dihedral assuming model banked verticallyyoud see equal area both upper lowerbanked wing know model condition could roll out its own drifting downwind speed match force wind definitely impervious influence wind since blithely floating air ocean aerodynamic soul leave ponder resulting relative wind airfoil both wingsand conse quently whatever angle attack exists model pursues its circular path constantlychanging relative wind increments years experience Don Srull have learned question nothing says scientist par excellence experienced aero nautical engineer constantly-winning modeler varied events Anything I better innocent comments man thinks like model believe pro asr ocean says what see what top cites Hewitt Phillips NASA did definitive analysis would bible subject Hewitt genius knew Indoor days early Thirties cannot argue Phillips says Don proved what see can take place backside gust think what see lightweight turning out wind precisely Hewitts gust condition effect model has created its 128 Model Aviation ao 10SASIFLIIIIG 13S.AAJ AZRCA L16BdhJa LIA5cN uaWpan 8 Luah. poem 6O 90 cun wiagapan 8 1uca power 2 ou L2R FOoT PLAN S1SZOOOZL TGLASS CL3SZOoOlL add 10% hiv A0 PLLZIS N PANTS PO 3 939 ZAH 11 11760 1 716 727O Classic U/C Scale iII sGRATL~ 40 Wing 15 25 Engines 5 0 IL SOMETHING NEW & BETTER! THE uii CWfWVTPf4 SPORT/TRAINER SIMPLE TO BUILD EASY TO FLY TRAINER -ORBUILD IT WITH AILERONS AND DO IT ALL OR WITH 05 ELECTRIC MOTOR 48 SPAN SQ IN 43 OZ SELECTED DIE AND MACHINE CUT BALSA AND PLYWOOD COMPLETE ROLLED PLANS STEP-BY-STEP INSTRUCTIONS ALL HARDWARE AND FORMED GEAR FLY WITH 20 FOUR CYCLE ENGINE ASK YOUR DEALER own back gust world dare say turns chases wind Turning wind effect creating gust-like environment head Its kinetic energy has converted something What really downwind turn way As Ken says downwind upwind has killed hundreds people can kill model go round float force bit dont bring up power youd expect strong wind Before war newly-soloed pilots some commercial guys 250 hours flew lightplanes over homesteads girl friends houses strong wind Theyd bank nicely wind gradually keep forcing circle rudder order see house gal simultaneously trying flatten angle bank ailerons cross controls theyd spin terrible mysterious problem until Leighton Collins explained great little magazine Air Facts As beginner wrote couple humble pieces him son editor Flying believe Argue among yourselves Dont bother pros cons share Willards comment Hey fellows lets knock off Just lets say some will lose altitude some wont will go out limb planes drift downwind Half-empty half-full glasses thats air oceanfor models anyway Bill Winter 4432 Altura Ct Fairfax VA 22030 Radio Technique/Myers Continued page 39 simultaneously order get some protection guy turns checking other users channel same scheme simultaneous use two RC channels imple mented way two parallel independent operating systems can also protect us disastrous consequences simple failures like battery exhaustion having battery antenna wire break pretty common occur rences Calvin Orr Custom Electronics recently loaned prototype Error Switch Normally Calvin supports simultaneous use two different bands such 50MHz 72 MHz goal investigate simultaneous use two 72 MHz frequencies Calvin says simultaneous use two 72 MHz channels including Error Detector switch ing can performed today minor modifications presently-available equipment already done Airtronics AM equipment using modified buddy-box connec tion Stage 2 tests Error Switch loaned came equipped 19 Airtronics connectors cheap way todays prices can buy two complete systems simply add Error Switch modified buddy-box cable join complete Redundant Radio system outlay $500 About Error Switch airborne Error Switch $149 item comes two flavors AM FM prototype AM type Error Switch samples both receiver outputs shuts down whichever receiver suffering inter ference FM version has bit sophisti cated order take care FMs capture Continued page 132 NEW FOX 4CycIe Special MIRACLE GLOW PLUG totally new concept glow plug design Instead using idle bar MIRACLE PLUG built pre-cotubustion chanther important thing plug retains heat better other know Try . 4-cycle motor 2-cycle motor also will get smoother throttle reslonse lrolably will able use less exlensive low nitro fuel Tests also show reduced fuel consumption cases WARNING motor Irobably will idle faster reset throttle erwise might able land Hard believe . course check out MIRACLE PLUG Just case 40702 4-Cycle Glow Plug $275 Manufacturing Company 5305 Towson Avenue Fort Smith AR 72901 October 1986 129 I DAVEY EMS CORPORATION E WOOD LANE MALVERN PA 19355 215 644-6772 dant-channel usage should able use two RC channels
Edition: Model Aviation - 1986/10
Page Numbers: 18, 19, 20, 21, 22, 24, 26, 128, 129
7Bill Winter~ LI________ Plane TaIL THE AVERAGE AGE 105000-plus AMA members 39 two years higher 1978 last curious Before anyone goes flap am Chicken Little sky falling never told nine kids must eat spinach cause its good know average age modelers has rising over 50 years since began 1927 ModelAirplane News 1929 kids gen eration identified Lindythe romance daring World War aces glamour early barnstormers Standards Jennies heroic air mail pilots like Jack Knight landed emergency fires auto headlights saw American Boy its plans Twenties-style appeal 300000 members AMLA preceded AMA starry-eyed Nationals trip prizes Olympics grew up wave modeling progress always complicated expen sive age curve really rose RC rich mans hobby Consider dollar volume aeromodeling industry today roughly $500000000 average member 39 yet born time already bewailing lack kids Relatively few us know another world exists Through entirely different outlets barely notice millions ROGs gliders other things sell substantial market thats around half century am reassured letters young people So much asked computer breakdown membership discovered have 11000 group under 19 smart cookies believe manage well things older folks also enjoy know put words thoughts together just finished building TD Coupe reports Mike OBryan 16-year-old What ask TD Coupe dont ask Mike appeared long ago MAN thought niftiest gassie see print Old-Timer designed Theodore Dykzoelwhere TD comes fromin 1936 graceful Old-Tim ers two factors consider before building Old-Timer continues Mike First foremost must pretty cause dont like aint gonna build Second like design isnt done very often ship fits both criteria first humbling effort covering silk although doubt will last yard white polka dot silk hobby shop has sitting bottom box since Wright brothers flew Kitty Hawk Im sucker fun crazy color schemes see two photos TD Coupes the left being Mikes other dads twist Young Mike covered silk dad preferred MonoKote Pop used fiberglass cowl Mike made balsa split middle access Mike blew up plans original 630 sq 900 Mikes silky aimed 60 oz caine out 64 K&B 40 SAM Society Antique Mod elers competition loading mere 1024 oz/sq ft Pops iron-on ship hit 12 OS 60 four-stroke Mike asked Pop would quicker trim spraying hand-painting told should take too long mask off hand-paint took Mike month paint sand trim Mike jokes dads 12-oz-loaded job proverbial lead sled loading similar Kaydet Sr makes Mike wonder Senior can soared expect Kaydet Sr soar fairly low-aspect wing mind ramble little Mike asks have something get off chest issue Junior problem Granted AMA card says Im Senior think am qualified enough give point view other side fence Mike have undivided attention column always melts down some place age instant gratification Mike advises us have fast foods drivethrough tellers banks commercial jets travel faster speed sound can get halfway across world matter hours overnight mall one-hour film processing super glues set seconds frozen foods get picture Whenever show friends hobby first comment make dont have patience fact some think Im crazy because cant imagine spending time building have possibility its being wiped out matter seconds Something else modeling fraternity has nt considered type young people hobby tends attract Generally athletic types have free time wrapped up organized sports therefore non-athletic likely participate hobby generalization isnt always true because other minor RC club 300 both engaged sports during school year other diversions like home computers people have days TV has infiltrated 99% American homes people have writing articles concerning problem blame cost dont really think problem because generally kid wants something hell save money until has enough Usually son daughter shows genuine interest something parents will help back financially Obviously hobby doesnt need expensive much does take make Control Line matter simple chuck glider usually kid thinks model alrplanes conjures up images expensive RC type am fortunate enough have father involved can honestly say pay about 90% hobby expenses through lawn mowing jobs have summer kids out have patience willing learn May relate experience couple years ago During summer sometimes get bored pass time Ill make chuckie fly front house until lands roof time made proved better flier anticipated None gliders ever great performance would stay up about seven seconds before crashing ground So took littie brother two chuckies over local grade school got eft Sixteen-year-old Mike 0Bryan enlarged plans TD Coupe 1936 MAN tram 630 900 sq TorSAM competition K&B 40 silk covered brush trimmed has split balsa cowl Hes designing 9-ft Ryson K&B 19 some 25 Claude Ryans elegant power/soarer retirement joy Right dad MonoKoted TO dont guys have covering preferences reversed 05 60 four-stroke power Mikes 64-oz beauty hess 1024 az/sq ft wing loading dads 12 oz Mike jokesthat itisa proverbial lead-sled 18 Model Aviation about eight nine years old romping around immediately gathered around started flying Three got bored after 15 minutes went back roughhousing stayed totally fascinated taught him throw correctly spent next two three hours throwing little chuckie around schoolyard didnt lose interest wings broke off wait 20 minutes Testors Green Tube cement back never saw kid again mistake because responsibility follow up Au Reminds Delta Dart promotions What Im trying point out kids Out up us find name Chris Register live Stone Mountain GA writes another upbeat young guy sounds running president have model aviation enthusiast since eight years old Au Now did get started am now 18 engineering student De Vry Technical Institute Decatur see other modelers have sent photo graphs have shown short write up Au positive approach am sending some photos recent project Gold berg Sky Tiger powered HB 40 ample power Believe actually flew slang word vocabulary skulter through whole Turnaround pat tern glitch bit sloppy maybe couldnt get flat spin satisfactorily chopped six inches off wing Man watch out Now its hard keep out em really admire old-timers keeping sport alive people like Au think means uns like dont think model aviation will ever die Thats about dont want take up too much flying time own philosophizing point out young guys dont instantly lock onto thing youll note Chris Comet T-Craft rubbe- job picked up three years ago K-Mart $159 Flies great says Chris urse.. Kids us am 70 years old have enjoyed building flying models ever since put plans old Boys Lfr John Van Ryzin checks Au John could have American Boy Milwaukee Journal used publish plans rubber-powered models Au Both Scripps-Howard Junior Aviators Hearst Junior Birdmenpapers big modelingprograms Remember old Aframe twin pushers made winders old egg beaters Lots fun Carved own left- right-hand props Au did some fun got RC retired married children gave Sanwa two-channel Andrews H-Ray What leaming experience powered Enya 15 III Control Line engine thought because flew Waco biplanes Stinson Trimotors full-scale ones flying model radio control leadpipe cinch 65 hand-to-eye coordination greatest conquered Au full-scale pilots have terrible time AC say miss feedback get seated cockpit overcontrol left-right nightmare versatile pilot know scares daylights out himself bystanders Tele masterwhich willfree flight its own dont bother stick whomping cure get up about 300 feet accept soothing words understanding low-key instructor stupid enough say give left right up down blows mind too fly straight lines back forth low power until find faith machine yourself get left-right stuff overcontrolling out system flew Control Line Stunt Combat well took 52-ft cables anchored CG cabin installed cable guide end wing flew H-Ray off schoolyard parking lot like CCW Control Line used spare tire car unimpressive pic rubber-powered T-crafttickles Winterto no end Chris says Comet Taylorcraft picked up local K-Mart $159 Its great flier too second airplane Sterling Citabria Chris states old can build like loved plane skills refined enough back fly very well Yes bitthe dust Young old theres lesson there. someplace adapter located center wheel adapter 1-in pipe center 3-fthigh broom handle mast top ofthe mast eight-penny nail could loop Du-Bro line connector over center pivot used stones weight tire would slip high speed centrifugal force made hundreds takeoffs landings Heres baby says 18-year-old Chris Register Goldberg Sky Tiger powered HB 40 unreal performance finally learned sustained inverted flight Winter says Chris later chopped off 6 span could inverted spins Heres Chris 14 Pilot GB 40 built friend Surprised him flew great Winter says 14 didnt know what ROG took him 30 years try fly things like Chris bomb Left This Antic still flies great 05 60 four-stroke after six years Right Lufberrys Nieuport has authentic instruments French complete cockpit folding gun rigging perthe original Shown OS 60 four-stroke Williams Bros LeRhone miniature Now has 05 90 four-stroke bar-stock LeRhone dummywe suppose needed additional nose weight power Actual size stated Let Scratch-built Aviantiker 0-3 part Antic part Aviatic part Rumpler Slow graceful OS 60 four-stroke Winter says Al should allow out night Right Dennyplane OS 40 four-stroke Takes off half-throttle cruises just above idle Au Evidently means Radio Control until gained enough courage let H-Ray go put small amounts fuel limit engine run no throttle control landing ending deadstick sure learns land way Happy day no crackups thought Id share idea anyone cannot get instructor help works fine ifyou have flown Control Line lot Any way can own first RC flight landed runway Walt Schroder hand-launched beast 7-ft 1947 RC Special rudder four-arm Good brothers escapement no throttle its Ohlsson 60 big stab hit Wait back head kept goingno Walts head talked out loud way landed huge argument over whether free-flighted piloted about loud bumping noise coming transmitter Walt couldnt hear itthough sounded like drum heart prepared flight Waits hold ing big ship aloft country kitchen calling maneuvers worked rudder innocent didnt know enough turn off escapement switch drove 60 miles next day find Ed Lorenz explained consequent mystery dead batteries too pilot never affected attempts fly RCone mans meat is.. Van Ryzin really wrote tell us about clever conversion Eaglet didnt know John Hunton did Screamin Eagle article August 1984 issue Model Aviation last T Ze Flying Circus Albert J Ward another ubiquitous Californian makes feel like blindfolded kid trying pin tail party donkey says model building led directly lifelong career never regretted moment it still fun Hes finished Sterling Ste arman powered OS 90 fourstroke spent three Navy years overhauling Stearmans Staggerwing Beechcrafts NAS Glenview weve few Nats hes added details can remember Spread beside display color photos wondrous variety intriguing ships say least reflect lifetime love affair character subjects hope get withjust few examples pleasureincluding Dennyplanewhich what will write about Due recent columns am flooded Dennyplanes said Midway kit fleet Telemasters spoilers carrying gliders go fly Sunday may encounter 25 Telemasters half spoil ers half gliders topand some both well flaps spoilersand perhaps 20 Model Aviation pictures page just part Al Wards Squadron Left OB 60 monster 0S 90 four-stroke provides air borne launch Marks Models Wanderer Spanning 82 has servo-operated hatch dropping whatever Above No3 Martin Handasyde version French Antoinette 9/48 scale spans 73 0S four-stroke shown now has Salto 45 four-stroke Lateral con trol provided bywing warping King postsand wires galore sprung wire-spoke wheels nose-over skid brasstank radiators pilot 10 Dennyplanes few zooted up ailerons less dihedral get picture Actually Ward gave 4-K kit friend summer vacation surprise friend presented Al ajewel fall framed ready go Al installed OS 40 four-stroker three-channel grossed 4 lb takeoff Gremlins tossed him series glitches resulting series sharp nose-up-and-down undulations high-G roller coaster wing snapped ird zig Kapow bears discussion first let Al tell paid much attention center section already framed up checked drawings built exactly plans entire frame glued Titebond Au think means OK Apparently wing plan shows wing Reginald Denny -even ers mi capal lion ir J wr igr designed strong enough added stresses weight RC flying recom mends future Dennyplane pushers beef up dihedral joints add webbing front spar least halfway out able salvage bird replacing beautiful engine cowl Au lovely cowl seems fascinate us aluminum panworks fine Denny flies just fine slow stable quick take off slow landing Takes off about half throttle cruises just above idle Au Thats fun-perfect tf under powered dont want ha twothirds throttle max takeoff OldTimer Should beef up Denny know will never break wing Old-Timer because fly gently through open loops wish snaps etc Id carry something extra out least one-third semi span across centerline lightly-built design balsa spars absolutely no penalty much insurance substituting same size spruce spars Id stab spar Id build Denny unmodified except Al has described concerns flat-bottom wings possibility radio malfunction would duplicate Als experience Broken wings common RCs early wi lere now eping c alre othy Ott sougn ked afteri nt ughnut shops d Doi rica Cai Banif everyw ould sc imore ing g agian say Hal all flat-bottomed phugoid pitching can fatal Guys would nose over dive pass vertical pull Out elevator killed Lincoln Beachey point exe cute vertical S try enter inverted half outside can flat-bottoms attain sustained inverted abort panic pull sharp split-S varying loads flat-bottom wing flown verge catastrophic youll need spruce sparsand webbing way out Doc Mathews keeps preaching Ive beenhackingbalsawoodsince 1932 am still trying get right comments too modestly Im retired United Airlines After 40 years full-size maintenance can now devote time smaller ones flies Bay area sites getting problem weather permits year-round flying first successful Free Flight inverted Gwinn Aero placed far down 1940 Nats Bantam-engined third-placer 1949 Plymouth Internats still alive sure does have time little ones including OS 40 four-stroke Flying Quaker Super Cyke Buzzard Bombshell Electric Play boy Viking Also Antic sorta-bipe Antic Top Flite J-3 Proctor Nieuport ye Continued page 22 October 1986 21 Sans spinner pic Winters new electric Heron 565 sq area has Robbe/Mabuichi motor cabin extension drive big Robbe folder Does 15 20 mm before dusk three trips max altitude six seven winch tow height Gear removes has yet flown way Has eight 1 2s 075 motor Draws 16 amps static though 28to 35 amps have reported others using com parable setups prop Schmitt pic 1-mm charge Ni-Cd booster Don Srull gets 2 mm FF Pietenpol powered tiny M RC FF electric motor two 100 mAh cells Williams plastic prop plane bigger outdoor CO-2 less fuss Field limits charge Schmit pic See anything different Gordon Stahls Gee Bee Bright red-and-wfllte scneme painted Used Aero Span Balsa USA Missing stab uses Evans/Simitar airfoil Get lust Plone emphasis product rather production Bob Godfrey Precision Built Models Kits creates custom planes very particular customers 1 / 3 scale Laser 200s built Tournament Champions evolved / 3 1 / 4 scale kits newest kit Phoenix 9 continues high standards Precision Built Models previously achieved Bob always striving improve Laser Kits Built Wings Laser Built Bones product building techniques both practical innovative Bob always willing give building engine advice anyone calls case repairs needed may purchase single wing fuse wood parts need Precision Built Models get just kit get service Bobs planes becoming popular planes fly 1/3 1/4 $ 35000$ 22900 6750037500 Laser CoveredBud Light Decals9500050000 Ready Fly eng & Radio Instal12000075000 Universal Receiver Battery Packing Sleeves Ties $250 Phoenix 9 complete kits $15995 Built up prices same 1 / 4 scale Laser Plans parts available Freight included Direct Sales Only P~c-Iskiin Haul Bob Godfrey/ 1818 6th Ave W Bradenton Florida 33505 813-747-7006 gods Martin-Handasyde like Antoinette Falcon 56 Headmaster 40 Q13 60 Monster Dennyplane Jr original Bantam FF Mini-Hogan FF rubber-powered Midwest Gol lywock Comet Sparky coupis Pea nuts .. Ken Willard dont box car column dreamed about Ken go back long way wed talk New York hotel room waited midnight Connie Sleeper LA Hes forgotten about air planes Ill ever know dont argue him seems Ken once published someones analysis claiming prove plane turning upwind downwind 180 will lose altitude Mine always did letters over world can believe own experience Id bet came textbook theorists no hands-on experience Note although plane turned into-thewind path downwind direction Ken did designate infamous killer downwind turn nor reference far fact plane trimmed cruise cruise poweror glider will loses altitude turning out wind will regain coming back wind assuming handsoff stable requires no interfering control inputs Ken told guys bug off like debate over angels can dance head pin paper chase went onand Ken almost lost cool July RCM lets leave Ken fascinating column hold.. want trombones hoary debate drips mossy tendrils definitive confrontation tween authorities took place Flying years ago Results Yer pays money takes yer cherce call basic syndrome Air Ocean pro air ocean theory postulate turning airplane part drifting air mass impervious outside inputs Usually airliner etc pictured 360 over say Pacific say 30000 ft youll never notice anything either aone ortwo needle-width turn heavy fast airplane since its airspeed relative wind encounters far cry model airspeed may compete wind half equal bad day alight moderately-powered plane its velocity plane really impervious its 360 true circle its 360 flight path has elongated downwind abbreviated upwind legs its related ground path naturally much distorted eye earthbound viewer may things wonder about tight 360 performed Cub 50 mph wind much comparable models making hands off 360 same wind Hands off means no control inputs used Entry requires gentlest inputso lets assume second 360 720 years pros said nothing about inertia kinetic energy cons claim factor Both sides argue whether changes direction influenced momentum cons say moving mass will tend continue its already-established direction argue results reduced airflow over wing downwind portion circle hence lowered airspeed consequent change angle attack leading nefarious down wind turn shenanigans ie downwind wind have caused full-scale plane well model fall out air Below will find that Ken shows Continued page 24 22 Model Aviation * Special Detergents help prevent varnish promote clean burning * Rust Preventatives protect expensive engines corrosion SIG CHAMPION 2-STROKE FUEL FREIGHT FREE SHIPPING ON ORDERS OVER $1500COLLECT PINTQUARTGALLON55 GAL DRUM 0% Nitromethane$315$450$1050$19000 5% Nitromethane$365$525$1250$25800 10% Nitromethane$415$550$1450$32500 15% Nitromethane$430$625$1650$38500 25% Nitromethane$495$750$2095$52000 35% Nitromethane$575$875$2495$66000 SIGPREMIUM4-STROKE FUEL 10% Nitromethane$415$550$1395$29500 15% Nitromethane$425$625$1595$35900 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending fuel finest quality ingredients available alcohol 995% pure very best grade available nitromethane use 100% pure get honest portion based % volume maximum lubrication get perfect 50/50 blend Bakers AA Castor Oil Klotz Techniplate Racing Oil protect expensive engines finest quaiity fuel can made price Dont take word try some judge yourself l See dealer first available order direct Call ri 800-247-5008 toll free orders Latest Catalog $300 ~LJ SIG MANUFACTURING CO Montezuma IA 50171 Prices sutitect chanee notice Hands Off Cut II Especially Designed Tapered Wings HANDS OFF CUT II unique device cutting high quality foam wing cores hands off also cuts both sides same time Most modelers will amazed high quality smooth surface will achieve using device plus added advantage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam components such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble s approximately 15 minutes Dealers Wanted Hands Off Cut II Hardware Pkgl $8750 plus $3 ship ft hand 24 Volt Variable Output Power Supply$5250 pius $3 ship ft hand //5 NORRAY PRODUCTS INC __________ 5008 Sandbeach Road Wichita Falls TX 76310 Tel 81716924475 VISA 11 oversimplification key question being whether kinetic energy momentum inertia whatever relative earth indicates air prefer go latter interpretation Aside saw good pilot bring big MAN Monocoupea fine modelover fence against strong wind slightly dip tip recover quickly nice go-round 360 entering approach again downwind fell like stone pilot Quarter Scale expert recovery 360 continued direction slightly dropped wing back over fence out good wind old approach path what considered enough added power flying Mono relative earth safe eye needed much power airspeed wider recovery pattern what appeared ade quate reader wonders about years old Kougar doing same thing excellent plane Another lost Stolph Starlet same way though crack flier asks have clues common denominator dreaded downwind turn opposing viewpoints will probably never reconciled Example two aero engineers high-time pilots expert model fliers pursued debate bitter end have files access finest scientific brains organizationsand mean biggies team least six organizations proved its case disproved others What think Ken just published thorough article math Thermalist newsletter Soaring Society East Tennessee sup posedly settles matter Kens words article proved yer takes yer cherce always kinetic energy relative ground key factor downwind furor Ken trotted out box car scrambled poor brain box car travels down track speed matching wind speed flies Indoor model constant 360s airspeed model 20mph Its speed inside box car traveling downwind 20mph flies against wind zero relative ground As circles downwind airspeed 40 mph 20mph relative moving car Ken asks Does model climb going against wind lose altitude downwind expected kinetic energy relative ground speed air nightmare true box car jerked instantaneous stop jerked instantly 20 mph again Didthe circling model remain center car dreams have meaning seeing circle Control Line lower wing tip center earth Since model banked turn its wing loading highertrue things fly tightlybanked Spitfire stalls 250 mph Still fog imagined model flying around pylon CL fashion being gravity Does matter box car goes Now half awake realize two things box car en capsulated box air model being Free Flight subject full range ac celeration/deceleration results RC control inputsthat pilot errors Does Kens model know upwind downwind within its moving encapsulated chunk still air sure dont know Note Ken does discount kinetic energy asks rather think relative ground air choice words suggests thinks relative air think him correctbut am Kinetic energy involves mass speed flying machine no kinetic energyno tenContinued page 26 24 Model Aviation ALL PURPOSE FOAM CU1TER POSI CURE CYANOACRYLATE SPECIAL INTRODUCTORY OFFER List Sale Savings 1 oz Fast Cure 3-5 Sec495$2450% Off 2 oz Fast Cure 3-5 Sec895$39656% Off 1 oz Gap-Filling 5 Sec495$249500/a Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied P051-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 2514789 SHIPPING Out State INFO 408 251-0787 Californiaper order Hour Mon-Wed Fr & Sat 930-530 FAST SERVICE 930-900 1200-500 COD ADD $190 dency remain motion maintain direction resist changes direction certainly would affect flight path plane could fly flying machine possesses no kin etic energy airspeed balloon zero wind stabilized fixed altitude Considerthis too An unintentional spin entry usually deadly snap differs inten tional spin entry plane slowed level flight stall occurs rudder jammed direction wanted spin accidental spin can entered out bottom over top Modelers say wing outside circle traveling faster therefore spin out bottom slower-moving wing quits Yet snaps over top training over-the-top entry executed maintaining slightly banked climbing turn top wing quits eventually Cub will roll over top entering spin right what left climbing turn suspect reason tad down aileron required maintained left climbing turn washin condition whereas slower lower wing its slight up aileron has washout course neutral ailerons present much normal flying would probably see over-the-top entry unless plane steeply banked high-speed turn time have seen model snap under such conditions over topsuch 09-pow ered little Scale foamie racked around too far downwind three-channel ship aileron position factor true downwind turn back wind pilot always yelled interference High-speed secondary stalls un known vast majority modelers Years ago Cdr Green invented stall warning indicator interviewed him Interavia fourlanguageeditionsSwiss aero journal partial stall Bonanza recovery horizon plenty power level flight reestablished ship feeling solid flew straight out good indicated airspeed after lapse seconds warning indicator intoned series tiny beeps plane stall region Obviously still power required Until side other gives up sin openminded comes air ocean genesis debate know models conformprobably because comparable condi tions necessary laboratory situation cannot created Hands now no flying moving aircraft carrier proof recently print Einsteins train inside Kens box car calm air Ive set up lightlyloaded low-powered craft perform 360s 720s hands off no changes altitude wind always lose altitude downwind side regain upwind flight circle tilted disk Proves nothing guess view Kens question whetherthat altitude loss due kinetic energy relative ground speed earthor air What see easily rubber good breeze wind strikes underside plane begins its hoped-for 360 low power high-pitch prop its climb poor nonexistent downwind leg prop slows down seems flail air airspeed obviously off though ground speed may great coming around wind plane will zoomespecially flat-bottom foil rpm picks up toowhich sometimes re sults stalls whip stalls Lift appears tremendously maguified point Continued page 128 26 Model Aviation ROUSH KITS TaylorCraft Full span 108 Area 1670 clipped 84 Area 1300 Power 75 12 Cu Oalaa&PIy 10-l2lbe $11996 Super Sport 120 Span 73 Area 960 Power 75 12 Cu Ifl $9996 Super Kwik Fli Span 70 Area 927 Power 75 12 Cu Ifl $8996 Two Ugly Stick Span 70 Area 1290 Power 75 12 Cu $9995 Jr Sticks Span 72 Area 1080 Power 75 12 Cu $7996 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1728 Dywood St SE Canton Ohio 44707 2144644610 THE LEADER IN COMPETITION PROPELLERS NEW 4 CYCLE SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHELATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 12 66A778 299 136778379 146778479 1567689 16678989 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 53/i34149 634149 72833A456179 83344568189 8/4566A7199 94566A77199 104566A7209 106W8W209 106EW219 114677778229 115W229 116EW239 11I67239 124W279 125W279 1256279 1356349 1456459 1556659 164AN969 16678969 RO PYLON RACING SERIES 500 DIAPITCHPRICE 7SN 5N279 8I67/7I8299 SERIES 400C 8/66777289 9777289 W WIDE BLADE EW EXTRA WIDE N NARROW cssI coazr tNDED Safety/Preston Continued page 16 Balsa knives Up point months column has offered advice us build internal-combustion engine-powered models As postscript comes safety message Scale Staffel newsletter should interest modelers came way Bill Winter author Just Fun column magazine Some five years ago reported incident also relayed via Bill concerned modeler bled death after cut himself leg balsa knife knives can hazardous Consider following tip Scale Staffel newsletter editor dont know name JP hobby knife quietly roll off work bench drop lap bury entire length blade right inner thigh bad news wound got infected very painful good news did land mere two inches left 25 cents could purchase cheapest surance life sketch accompanied Scale Staffel newsletter safety tip showed soft vinyl triangular-shaped sleeve handle knife Apparently can obtained sta tionary stores about 25 50 cents tended slipped onto pencils prevent rolling off tables desks etc claimed such sleeve does interfere use knife may actually help grip handle Have safe month John Preston Model Aviation 1810 Samuel Morse Drive Reston Virginia 22090 Plane Talk/Winter Continued page 26 fly rudder-only RC jobs know can lose downwind out sightunable penetrate after downwind turns down wind portion circle sideways drift lightweight ship revealed wind blowing against top plane Such changes display wind airspeed changing relative other points circle since wind relative wing changing angle attack kinetic energy involved know upon turning wind plane can slow abruptly some reason go climb Dealers Distributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC P 0 Box 2136 Fan-tax Vrgnia 32031 U 5 stall As varying airspeed 360 model find certaln three-channel RC models slow respond rudder downwind sideso much some like Rebel can barely brought back wind rudder action powerful Airspeed over rudder going downwind less no argument therefore less over entire plane including wing plane must accelerate downwind leg malntaln its original speed relative wind So its obvious eye wind time sorta blowing model along say Get out way two Gordon Light Rubber Commer cialsa sport version Wakefield winner flew beautifully gentle wind strong wind always spiraled ground downwind segment circle added dihedral problem vanished no way Rebel GL model could blissfully drifting air ocean Suppose wind As Gordon Light model banks front you see its top dihedral has the top wing see less see lower wing ridiculously large dihedral would see wind large expanse upper wing little nothing lower wing other extremethat no dihedral assuming model banked verticallyyoud see equal area both upper lowerbanked wing know model condition could roll out its own drifting downwind speed match force wind definitely impervious influence wind since blithely floating air ocean aerodynamic soul leave ponder resulting relative wind airfoil both wingsand conse quently whatever angle attack exists model pursues its circular path constantlychanging relative wind increments years experience Don Srull have learned question nothing says scientist par excellence experienced aero nautical engineer constantly-winning modeler varied events Anything I better innocent comments man thinks like model believe pro asr ocean says what see what top cites Hewitt Phillips NASA did definitive analysis would bible subject Hewitt genius knew Indoor days early Thirties cannot argue Phillips says Don proved what see can take place backside gust think what see lightweight turning out wind precisely Hewitts gust condition effect model has created its 128 Model Aviation ao 10SASIFLIIIIG 13S.AAJ AZRCA L16BdhJa LIA5cN uaWpan 8 Luah. poem 6O 90 cun wiagapan 8 1uca power 2 ou L2R FOoT PLAN S1SZOOOZL TGLASS CL3SZOoOlL add 10% hiv A0 PLLZIS N PANTS PO 3 939 ZAH 11 11760 1 716 727O Classic U/C Scale iII sGRATL~ 40 Wing 15 25 Engines 5 0 IL SOMETHING NEW & BETTER! THE uii CWfWVTPf4 SPORT/TRAINER SIMPLE TO BUILD EASY TO FLY TRAINER -ORBUILD IT WITH AILERONS AND DO IT ALL OR WITH 05 ELECTRIC MOTOR 48 SPAN SQ IN 43 OZ SELECTED DIE AND MACHINE CUT BALSA AND PLYWOOD COMPLETE ROLLED PLANS STEP-BY-STEP INSTRUCTIONS ALL HARDWARE AND FORMED GEAR FLY WITH 20 FOUR CYCLE ENGINE ASK YOUR DEALER own back gust world dare say turns chases wind Turning wind effect creating gust-like environment head Its kinetic energy has converted something What really downwind turn way As Ken says downwind upwind has killed hundreds people can kill model go round float force bit dont bring up power youd expect strong wind Before war newly-soloed pilots some commercial guys 250 hours flew lightplanes over homesteads girl friends houses strong wind Theyd bank nicely wind gradually keep forcing circle rudder order see house gal simultaneously trying flatten angle bank ailerons cross controls theyd spin terrible mysterious problem until Leighton Collins explained great little magazine Air Facts As beginner wrote couple humble pieces him son editor Flying believe Argue among yourselves Dont bother pros cons share Willards comment Hey fellows lets knock off Just lets say some will lose altitude some wont will go out limb planes drift downwind Half-empty half-full glasses thats air oceanfor models anyway Bill Winter 4432 Altura Ct Fairfax VA 22030 Radio Technique/Myers Continued page 39 simultaneously order get some protection guy turns checking other users channel same scheme simultaneous use two RC channels imple mented way two parallel independent operating systems can also protect us disastrous consequences simple failures like battery exhaustion having battery antenna wire break pretty common occur rences Calvin Orr Custom Electronics recently loaned prototype Error Switch Normally Calvin supports simultaneous use two different bands such 50MHz 72 MHz goal investigate simultaneous use two 72 MHz frequencies Calvin says simultaneous use two 72 MHz channels including Error Detector switch ing can performed today minor modifications presently-available equipment already done Airtronics AM equipment using modified buddy-box connec tion Stage 2 tests Error Switch loaned came equipped 19 Airtronics connectors cheap way todays prices can buy two complete systems simply add Error Switch modified buddy-box cable join complete Redundant Radio system outlay $500 About Error Switch airborne Error Switch $149 item comes two flavors AM FM prototype AM type Error Switch samples both receiver outputs shuts down whichever receiver suffering inter ference FM version has bit sophisti cated order take care FMs capture Continued page 132 NEW FOX 4CycIe Special MIRACLE GLOW PLUG totally new concept glow plug design Instead using idle bar MIRACLE PLUG built pre-cotubustion chanther important thing plug retains heat better other know Try . 4-cycle motor 2-cycle motor also will get smoother throttle reslonse lrolably will able use less exlensive low nitro fuel Tests also show reduced fuel consumption cases WARNING motor Irobably will idle faster reset throttle erwise might able land Hard believe . course check out MIRACLE PLUG Just case 40702 4-Cycle Glow Plug $275 Manufacturing Company 5305 Towson Avenue Fort Smith AR 72901 October 1986 129 I DAVEY EMS CORPORATION E WOOD LANE MALVERN PA 19355 215 644-6772 dant-channel usage should able use two RC channels
Edition: Model Aviation - 1986/10
Page Numbers: 18, 19, 20, 21, 22, 24, 26, 128, 129
7Bill Winter~ LI________ Plane TaIL THE AVERAGE AGE 105000-plus AMA members 39 two years higher 1978 last curious Before anyone goes flap am Chicken Little sky falling never told nine kids must eat spinach cause its good know average age modelers has rising over 50 years since began 1927 ModelAirplane News 1929 kids gen eration identified Lindythe romance daring World War aces glamour early barnstormers Standards Jennies heroic air mail pilots like Jack Knight landed emergency fires auto headlights saw American Boy its plans Twenties-style appeal 300000 members AMLA preceded AMA starry-eyed Nationals trip prizes Olympics grew up wave modeling progress always complicated expen sive age curve really rose RC rich mans hobby Consider dollar volume aeromodeling industry today roughly $500000000 average member 39 yet born time already bewailing lack kids Relatively few us know another world exists Through entirely different outlets barely notice millions ROGs gliders other things sell substantial market thats around half century am reassured letters young people So much asked computer breakdown membership discovered have 11000 group under 19 smart cookies believe manage well things older folks also enjoy know put words thoughts together just finished building TD Coupe reports Mike OBryan 16-year-old What ask TD Coupe dont ask Mike appeared long ago MAN thought niftiest gassie see print Old-Timer designed Theodore Dykzoelwhere TD comes fromin 1936 graceful Old-Tim ers two factors consider before building Old-Timer continues Mike First foremost must pretty cause dont like aint gonna build Second like design isnt done very often ship fits both criteria first humbling effort covering silk although doubt will last yard white polka dot silk hobby shop has sitting bottom box since Wright brothers flew Kitty Hawk Im sucker fun crazy color schemes see two photos TD Coupes the left being Mikes other dads twist Young Mike covered silk dad preferred MonoKote Pop used fiberglass cowl Mike made balsa split middle access Mike blew up plans original 630 sq 900 Mikes silky aimed 60 oz caine out 64 K&B 40 SAM Society Antique Mod elers competition loading mere 1024 oz/sq ft Pops iron-on ship hit 12 OS 60 four-stroke Mike asked Pop would quicker trim spraying hand-painting told should take too long mask off hand-paint took Mike month paint sand trim Mike jokes dads 12-oz-loaded job proverbial lead sled loading similar Kaydet Sr makes Mike wonder Senior can soared expect Kaydet Sr soar fairly low-aspect wing mind ramble little Mike asks have something get off chest issue Junior problem Granted AMA card says Im Senior think am qualified enough give point view other side fence Mike have undivided attention column always melts down some place age instant gratification Mike advises us have fast foods drivethrough tellers banks commercial jets travel faster speed sound can get halfway across world matter hours overnight mall one-hour film processing super glues set seconds frozen foods get picture Whenever show friends hobby first comment make dont have patience fact some think Im crazy because cant imagine spending time building have possibility its being wiped out matter seconds Something else modeling fraternity has nt considered type young people hobby tends attract Generally athletic types have free time wrapped up organized sports therefore non-athletic likely participate hobby generalization isnt always true because other minor RC club 300 both engaged sports during school year other diversions like home computers people have days TV has infiltrated 99% American homes people have writing articles concerning problem blame cost dont really think problem because generally kid wants something hell save money until has enough Usually son daughter shows genuine interest something parents will help back financially Obviously hobby doesnt need expensive much does take make Control Line matter simple chuck glider usually kid thinks model alrplanes conjures up images expensive RC type am fortunate enough have father involved can honestly say pay about 90% hobby expenses through lawn mowing jobs have summer kids out have patience willing learn May relate experience couple years ago During summer sometimes get bored pass time Ill make chuckie fly front house until lands roof time made proved better flier anticipated None gliders ever great performance would stay up about seven seconds before crashing ground So took littie brother two chuckies over local grade school got eft Sixteen-year-old Mike 0Bryan enlarged plans TD Coupe 1936 MAN tram 630 900 sq TorSAM competition K&B 40 silk covered brush trimmed has split balsa cowl Hes designing 9-ft Ryson K&B 19 some 25 Claude Ryans elegant power/soarer retirement joy Right dad MonoKoted TO dont guys have covering preferences reversed 05 60 four-stroke power Mikes 64-oz beauty hess 1024 az/sq ft wing loading dads 12 oz Mike jokesthat itisa proverbial lead-sled 18 Model Aviation about eight nine years old romping around immediately gathered around started flying Three got bored after 15 minutes went back roughhousing stayed totally fascinated taught him throw correctly spent next two three hours throwing little chuckie around schoolyard didnt lose interest wings broke off wait 20 minutes Testors Green Tube cement back never saw kid again mistake because responsibility follow up Au Reminds Delta Dart promotions What Im trying point out kids Out up us find name Chris Register live Stone Mountain GA writes another upbeat young guy sounds running president have model aviation enthusiast since eight years old Au Now did get started am now 18 engineering student De Vry Technical Institute Decatur see other modelers have sent photo graphs have shown short write up Au positive approach am sending some photos recent project Gold berg Sky Tiger powered HB 40 ample power Believe actually flew slang word vocabulary skulter through whole Turnaround pat tern glitch bit sloppy maybe couldnt get flat spin satisfactorily chopped six inches off wing Man watch out Now its hard keep out em really admire old-timers keeping sport alive people like Au think means uns like dont think model aviation will ever die Thats about dont want take up too much flying time own philosophizing point out young guys dont instantly lock onto thing youll note Chris Comet T-Craft rubbe- job picked up three years ago K-Mart $159 Flies great says Chris urse.. Kids us am 70 years old have enjoyed building flying models ever since put plans old Boys Lfr John Van Ryzin checks Au John could have American Boy Milwaukee Journal used publish plans rubber-powered models Au Both Scripps-Howard Junior Aviators Hearst Junior Birdmenpapers big modelingprograms Remember old Aframe twin pushers made winders old egg beaters Lots fun Carved own left- right-hand props Au did some fun got RC retired married children gave Sanwa two-channel Andrews H-Ray What leaming experience powered Enya 15 III Control Line engine thought because flew Waco biplanes Stinson Trimotors full-scale ones flying model radio control leadpipe cinch 65 hand-to-eye coordination greatest conquered Au full-scale pilots have terrible time AC say miss feedback get seated cockpit overcontrol left-right nightmare versatile pilot know scares daylights out himself bystanders Tele masterwhich willfree flight its own dont bother stick whomping cure get up about 300 feet accept soothing words understanding low-key instructor stupid enough say give left right up down blows mind too fly straight lines back forth low power until find faith machine yourself get left-right stuff overcontrolling out system flew Control Line Stunt Combat well took 52-ft cables anchored CG cabin installed cable guide end wing flew H-Ray off schoolyard parking lot like CCW Control Line used spare tire car unimpressive pic rubber-powered T-crafttickles Winterto no end Chris says Comet Taylorcraft picked up local K-Mart $159 Its great flier too second airplane Sterling Citabria Chris states old can build like loved plane skills refined enough back fly very well Yes bitthe dust Young old theres lesson there. someplace adapter located center wheel adapter 1-in pipe center 3-fthigh broom handle mast top ofthe mast eight-penny nail could loop Du-Bro line connector over center pivot used stones weight tire would slip high speed centrifugal force made hundreds takeoffs landings Heres baby says 18-year-old Chris Register Goldberg Sky Tiger powered HB 40 unreal performance finally learned sustained inverted flight Winter says Chris later chopped off 6 span could inverted spins Heres Chris 14 Pilot GB 40 built friend Surprised him flew great Winter says 14 didnt know what ROG took him 30 years try fly things like Chris bomb Left This Antic still flies great 05 60 four-stroke after six years Right Lufberrys Nieuport has authentic instruments French complete cockpit folding gun rigging perthe original Shown OS 60 four-stroke Williams Bros LeRhone miniature Now has 05 90 four-stroke bar-stock LeRhone dummywe suppose needed additional nose weight power Actual size stated Let Scratch-built Aviantiker 0-3 part Antic part Aviatic part Rumpler Slow graceful OS 60 four-stroke Winter says Al should allow out night Right Dennyplane OS 40 four-stroke Takes off half-throttle cruises just above idle Au Evidently means Radio Control until gained enough courage let H-Ray go put small amounts fuel limit engine run no throttle control landing ending deadstick sure learns land way Happy day no crackups thought Id share idea anyone cannot get instructor help works fine ifyou have flown Control Line lot Any way can own first RC flight landed runway Walt Schroder hand-launched beast 7-ft 1947 RC Special rudder four-arm Good brothers escapement no throttle its Ohlsson 60 big stab hit Wait back head kept goingno Walts head talked out loud way landed huge argument over whether free-flighted piloted about loud bumping noise coming transmitter Walt couldnt hear itthough sounded like drum heart prepared flight Waits hold ing big ship aloft country kitchen calling maneuvers worked rudder innocent didnt know enough turn off escapement switch drove 60 miles next day find Ed Lorenz explained consequent mystery dead batteries too pilot never affected attempts fly RCone mans meat is.. Van Ryzin really wrote tell us about clever conversion Eaglet didnt know John Hunton did Screamin Eagle article August 1984 issue Model Aviation last T Ze Flying Circus Albert J Ward another ubiquitous Californian makes feel like blindfolded kid trying pin tail party donkey says model building led directly lifelong career never regretted moment it still fun Hes finished Sterling Ste arman powered OS 90 fourstroke spent three Navy years overhauling Stearmans Staggerwing Beechcrafts NAS Glenview weve few Nats hes added details can remember Spread beside display color photos wondrous variety intriguing ships say least reflect lifetime love affair character subjects hope get withjust few examples pleasureincluding Dennyplanewhich what will write about Due recent columns am flooded Dennyplanes said Midway kit fleet Telemasters spoilers carrying gliders go fly Sunday may encounter 25 Telemasters half spoil ers half gliders topand some both well flaps spoilersand perhaps 20 Model Aviation pictures page just part Al Wards Squadron Left OB 60 monster 0S 90 four-stroke provides air borne launch Marks Models Wanderer Spanning 82 has servo-operated hatch dropping whatever Above No3 Martin Handasyde version French Antoinette 9/48 scale spans 73 0S four-stroke shown now has Salto 45 four-stroke Lateral con trol provided bywing warping King postsand wires galore sprung wire-spoke wheels nose-over skid brasstank radiators pilot 10 Dennyplanes few zooted up ailerons less dihedral get picture Actually Ward gave 4-K kit friend summer vacation surprise friend presented Al ajewel fall framed ready go Al installed OS 40 four-stroker three-channel grossed 4 lb takeoff Gremlins tossed him series glitches resulting series sharp nose-up-and-down undulations high-G roller coaster wing snapped ird zig Kapow bears discussion first let Al tell paid much attention center section already framed up checked drawings built exactly plans entire frame glued Titebond Au think means OK Apparently wing plan shows wing Reginald Denny -even ers mi capal lion ir J wr igr designed strong enough added stresses weight RC flying recom mends future Dennyplane pushers beef up dihedral joints add webbing front spar least halfway out able salvage bird replacing beautiful engine cowl Au lovely cowl seems fascinate us aluminum panworks fine Denny flies just fine slow stable quick take off slow landing Takes off about half throttle cruises just above idle Au Thats fun-perfect tf under powered dont want ha twothirds throttle max takeoff OldTimer Should beef up Denny know will never break wing Old-Timer because fly gently through open loops wish snaps etc Id carry something extra out least one-third semi span across centerline lightly-built design balsa spars absolutely no penalty much insurance substituting same size spruce spars Id stab spar Id build Denny unmodified except Al has described concerns flat-bottom wings possibility radio malfunction would duplicate Als experience Broken wings common RCs early wi lere now eping c alre othy Ott sougn ked afteri nt ughnut shops d Doi rica Cai Banif everyw ould sc imore ing g agian say Hal all flat-bottomed phugoid pitching can fatal Guys would nose over dive pass vertical pull Out elevator killed Lincoln Beachey point exe cute vertical S try enter inverted half outside can flat-bottoms attain sustained inverted abort panic pull sharp split-S varying loads flat-bottom wing flown verge catastrophic youll need spruce sparsand webbing way out Doc Mathews keeps preaching Ive beenhackingbalsawoodsince 1932 am still trying get right comments too modestly Im retired United Airlines After 40 years full-size maintenance can now devote time smaller ones flies Bay area sites getting problem weather permits year-round flying first successful Free Flight inverted Gwinn Aero placed far down 1940 Nats Bantam-engined third-placer 1949 Plymouth Internats still alive sure does have time little ones including OS 40 four-stroke Flying Quaker Super Cyke Buzzard Bombshell Electric Play boy Viking Also Antic sorta-bipe Antic Top Flite J-3 Proctor Nieuport ye Continued page 22 October 1986 21 Sans spinner pic Winters new electric Heron 565 sq area has Robbe/Mabuichi motor cabin extension drive big Robbe folder Does 15 20 mm before dusk three trips max altitude six seven winch tow height Gear removes has yet flown way Has eight 1 2s 075 motor Draws 16 amps static though 28to 35 amps have reported others using com parable setups prop Schmitt pic 1-mm charge Ni-Cd booster Don Srull gets 2 mm FF Pietenpol powered tiny M RC FF electric motor two 100 mAh cells Williams plastic prop plane bigger outdoor CO-2 less fuss Field limits charge Schmit pic See anything different Gordon Stahls Gee Bee Bright red-and-wfllte scneme painted Used Aero Span Balsa USA Missing stab uses Evans/Simitar airfoil Get lust Plone emphasis product rather production Bob Godfrey Precision Built Models Kits creates custom planes very particular customers 1 / 3 scale Laser 200s built Tournament Champions evolved / 3 1 / 4 scale kits newest kit Phoenix 9 continues high standards Precision Built Models previously achieved Bob always striving improve Laser Kits Built Wings Laser Built Bones product building techniques both practical innovative Bob always willing give building engine advice anyone calls case repairs needed may purchase single wing fuse wood parts need Precision Built Models get just kit get service Bobs planes becoming popular planes fly 1/3 1/4 $ 35000$ 22900 6750037500 Laser CoveredBud Light Decals9500050000 Ready Fly eng & Radio Instal12000075000 Universal Receiver Battery Packing Sleeves Ties $250 Phoenix 9 complete kits $15995 Built up prices same 1 / 4 scale Laser Plans parts available Freight included Direct Sales Only P~c-Iskiin Haul Bob Godfrey/ 1818 6th Ave W Bradenton Florida 33505 813-747-7006 gods Martin-Handasyde like Antoinette Falcon 56 Headmaster 40 Q13 60 Monster Dennyplane Jr original Bantam FF Mini-Hogan FF rubber-powered Midwest Gol lywock Comet Sparky coupis Pea nuts .. Ken Willard dont box car column dreamed about Ken go back long way wed talk New York hotel room waited midnight Connie Sleeper LA Hes forgotten about air planes Ill ever know dont argue him seems Ken once published someones analysis claiming prove plane turning upwind downwind 180 will lose altitude Mine always did letters over world can believe own experience Id bet came textbook theorists no hands-on experience Note although plane turned into-thewind path downwind direction Ken did designate infamous killer downwind turn nor reference far fact plane trimmed cruise cruise poweror glider will loses altitude turning out wind will regain coming back wind assuming handsoff stable requires no interfering control inputs Ken told guys bug off like debate over angels can dance head pin paper chase went onand Ken almost lost cool July RCM lets leave Ken fascinating column hold.. want trombones hoary debate drips mossy tendrils definitive confrontation tween authorities took place Flying years ago Results Yer pays money takes yer cherce call basic syndrome Air Ocean pro air ocean theory postulate turning airplane part drifting air mass impervious outside inputs Usually airliner etc pictured 360 over say Pacific say 30000 ft youll never notice anything either aone ortwo needle-width turn heavy fast airplane since its airspeed relative wind encounters far cry model airspeed may compete wind half equal bad day alight moderately-powered plane its velocity plane really impervious its 360 true circle its 360 flight path has elongated downwind abbreviated upwind legs its related ground path naturally much distorted eye earthbound viewer may things wonder about tight 360 performed Cub 50 mph wind much comparable models making hands off 360 same wind Hands off means no control inputs used Entry requires gentlest inputso lets assume second 360 720 years pros said nothing about inertia kinetic energy cons claim factor Both sides argue whether changes direction influenced momentum cons say moving mass will tend continue its already-established direction argue results reduced airflow over wing downwind portion circle hence lowered airspeed consequent change angle attack leading nefarious down wind turn shenanigans ie downwind wind have caused full-scale plane well model fall out air Below will find that Ken shows Continued page 24 22 Model Aviation * Special Detergents help prevent varnish promote clean burning * Rust Preventatives protect expensive engines corrosion SIG CHAMPION 2-STROKE FUEL FREIGHT FREE SHIPPING ON ORDERS OVER $1500COLLECT PINTQUARTGALLON55 GAL DRUM 0% Nitromethane$315$450$1050$19000 5% Nitromethane$365$525$1250$25800 10% Nitromethane$415$550$1450$32500 15% Nitromethane$430$625$1650$38500 25% Nitromethane$495$750$2095$52000 35% Nitromethane$575$875$2495$66000 SIGPREMIUM4-STROKE FUEL 10% Nitromethane$415$550$1395$29500 15% Nitromethane$425$625$1595$35900 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending fuel finest quality ingredients available alcohol 995% pure very best grade available nitromethane use 100% pure get honest portion based % volume maximum lubrication get perfect 50/50 blend Bakers AA Castor Oil Klotz Techniplate Racing Oil protect expensive engines finest quaiity fuel can made price Dont take word try some judge yourself l See dealer first available order direct Call ri 800-247-5008 toll free orders Latest Catalog $300 ~LJ SIG MANUFACTURING CO Montezuma IA 50171 Prices sutitect chanee notice Hands Off Cut II Especially Designed Tapered Wings HANDS OFF CUT II unique device cutting high quality foam wing cores hands off also cuts both sides same time Most modelers will amazed high quality smooth surface will achieve using device plus added advantage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam components such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble s approximately 15 minutes Dealers Wanted Hands Off Cut II Hardware Pkgl $8750 plus $3 ship ft hand 24 Volt Variable Output Power Supply$5250 pius $3 ship ft hand //5 NORRAY PRODUCTS INC __________ 5008 Sandbeach Road Wichita Falls TX 76310 Tel 81716924475 VISA 11 oversimplification key question being whether kinetic energy momentum inertia whatever relative earth indicates air prefer go latter interpretation Aside saw good pilot bring big MAN Monocoupea fine modelover fence against strong wind slightly dip tip recover quickly nice go-round 360 entering approach again downwind fell like stone pilot Quarter Scale expert recovery 360 continued direction slightly dropped wing back over fence out good wind old approach path what considered enough added power flying Mono relative earth safe eye needed much power airspeed wider recovery pattern what appeared ade quate reader wonders about years old Kougar doing same thing excellent plane Another lost Stolph Starlet same way though crack flier asks have clues common denominator dreaded downwind turn opposing viewpoints will probably never reconciled Example two aero engineers high-time pilots expert model fliers pursued debate bitter end have files access finest scientific brains organizationsand mean biggies team least six organizations proved its case disproved others What think Ken just published thorough article math Thermalist newsletter Soaring Society East Tennessee sup posedly settles matter Kens words article proved yer takes yer cherce always kinetic energy relative ground key factor downwind furor Ken trotted out box car scrambled poor brain box car travels down track speed matching wind speed flies Indoor model constant 360s airspeed model 20mph Its speed inside box car traveling downwind 20mph flies against wind zero relative ground As circles downwind airspeed 40 mph 20mph relative moving car Ken asks Does model climb going against wind lose altitude downwind expected kinetic energy relative ground speed air nightmare true box car jerked instantaneous stop jerked instantly 20 mph again Didthe circling model remain center car dreams have meaning seeing circle Control Line lower wing tip center earth Since model banked turn its wing loading highertrue things fly tightlybanked Spitfire stalls 250 mph Still fog imagined model flying around pylon CL fashion being gravity Does matter box car goes Now half awake realize two things box car en capsulated box air model being Free Flight subject full range ac celeration/deceleration results RC control inputsthat pilot errors Does Kens model know upwind downwind within its moving encapsulated chunk still air sure dont know Note Ken does discount kinetic energy asks rather think relative ground air choice words suggests thinks relative air think him correctbut am Kinetic energy involves mass speed flying machine no kinetic energyno tenContinued page 26 24 Model Aviation ALL PURPOSE FOAM CU1TER POSI CURE CYANOACRYLATE SPECIAL INTRODUCTORY OFFER List Sale Savings 1 oz Fast Cure 3-5 Sec495$2450% Off 2 oz Fast Cure 3-5 Sec895$39656% Off 1 oz Gap-Filling 5 Sec495$249500/a Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied P051-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 2514789 SHIPPING Out State INFO 408 251-0787 Californiaper order Hour Mon-Wed Fr & Sat 930-530 FAST SERVICE 930-900 1200-500 COD ADD $190 dency remain motion maintain direction resist changes direction certainly would affect flight path plane could fly flying machine possesses no kin etic energy airspeed balloon zero wind stabilized fixed altitude Considerthis too An unintentional spin entry usually deadly snap differs inten tional spin entry plane slowed level flight stall occurs rudder jammed direction wanted spin accidental spin can entered out bottom over top Modelers say wing outside circle traveling faster therefore spin out bottom slower-moving wing quits Yet snaps over top training over-the-top entry executed maintaining slightly banked climbing turn top wing quits eventually Cub will roll over top entering spin right what left climbing turn suspect reason tad down aileron required maintained left climbing turn washin condition whereas slower lower wing its slight up aileron has washout course neutral ailerons present much normal flying would probably see over-the-top entry unless plane steeply banked high-speed turn time have seen model snap under such conditions over topsuch 09-pow ered little Scale foamie racked around too far downwind three-channel ship aileron position factor true downwind turn back wind pilot always yelled interference High-speed secondary stalls un known vast majority modelers Years ago Cdr Green invented stall warning indicator interviewed him Interavia fourlanguageeditionsSwiss aero journal partial stall Bonanza recovery horizon plenty power level flight reestablished ship feeling solid flew straight out good indicated airspeed after lapse seconds warning indicator intoned series tiny beeps plane stall region Obviously still power required Until side other gives up sin openminded comes air ocean genesis debate know models conformprobably because comparable condi tions necessary laboratory situation cannot created Hands now no flying moving aircraft carrier proof recently print Einsteins train inside Kens box car calm air Ive set up lightlyloaded low-powered craft perform 360s 720s hands off no changes altitude wind always lose altitude downwind side regain upwind flight circle tilted disk Proves nothing guess view Kens question whetherthat altitude loss due kinetic energy relative ground speed earthor air What see easily rubber good breeze wind strikes underside plane begins its hoped-for 360 low power high-pitch prop its climb poor nonexistent downwind leg prop slows down seems flail air airspeed obviously off though ground speed may great coming around wind plane will zoomespecially flat-bottom foil rpm picks up toowhich sometimes re sults stalls whip stalls Lift appears tremendously maguified point Continued page 128 26 Model Aviation ROUSH KITS TaylorCraft Full span 108 Area 1670 clipped 84 Area 1300 Power 75 12 Cu Oalaa&PIy 10-l2lbe $11996 Super Sport 120 Span 73 Area 960 Power 75 12 Cu Ifl $9996 Super Kwik Fli Span 70 Area 927 Power 75 12 Cu Ifl $8996 Two Ugly Stick Span 70 Area 1290 Power 75 12 Cu $9995 Jr Sticks Span 72 Area 1080 Power 75 12 Cu $7996 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1728 Dywood St SE Canton Ohio 44707 2144644610 THE LEADER IN COMPETITION PROPELLERS NEW 4 CYCLE SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHELATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 12 66A778 299 136778379 146778479 1567689 16678989 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 53/i34149 634149 72833A456179 83344568189 8/4566A7199 94566A77199 104566A7209 106W8W209 106EW219 114677778229 115W229 116EW239 11I67239 124W279 125W279 1256279 1356349 1456459 1556659 164AN969 16678969 RO PYLON RACING SERIES 500 DIAPITCHPRICE 7SN 5N279 8I67/7I8299 SERIES 400C 8/66777289 9777289 W WIDE BLADE EW EXTRA WIDE N NARROW cssI coazr tNDED Safety/Preston Continued page 16 Balsa knives Up point months column has offered advice us build internal-combustion engine-powered models As postscript comes safety message Scale Staffel newsletter should interest modelers came way Bill Winter author Just Fun column magazine Some five years ago reported incident also relayed via Bill concerned modeler bled death after cut himself leg balsa knife knives can hazardous Consider following tip Scale Staffel newsletter editor dont know name JP hobby knife quietly roll off work bench drop lap bury entire length blade right inner thigh bad news wound got infected very painful good news did land mere two inches left 25 cents could purchase cheapest surance life sketch accompanied Scale Staffel newsletter safety tip showed soft vinyl triangular-shaped sleeve handle knife Apparently can obtained sta tionary stores about 25 50 cents tended slipped onto pencils prevent rolling off tables desks etc claimed such sleeve does interfere use knife may actually help grip handle Have safe month John Preston Model Aviation 1810 Samuel Morse Drive Reston Virginia 22090 Plane Talk/Winter Continued page 26 fly rudder-only RC jobs know can lose downwind out sightunable penetrate after downwind turns down wind portion circle sideways drift lightweight ship revealed wind blowing against top plane Such changes display wind airspeed changing relative other points circle since wind relative wing changing angle attack kinetic energy involved know upon turning wind plane can slow abruptly some reason go climb Dealers Distributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC P 0 Box 2136 Fan-tax Vrgnia 32031 U 5 stall As varying airspeed 360 model find certaln three-channel RC models slow respond rudder downwind sideso much some like Rebel can barely brought back wind rudder action powerful Airspeed over rudder going downwind less no argument therefore less over entire plane including wing plane must accelerate downwind leg malntaln its original speed relative wind So its obvious eye wind time sorta blowing model along say Get out way two Gordon Light Rubber Commer cialsa sport version Wakefield winner flew beautifully gentle wind strong wind always spiraled ground downwind segment circle added dihedral problem vanished no way Rebel GL model could blissfully drifting air ocean Suppose wind As Gordon Light model banks front you see its top dihedral has the top wing see less see lower wing ridiculously large dihedral would see wind large expanse upper wing little nothing lower wing other extremethat no dihedral assuming model banked verticallyyoud see equal area both upper lowerbanked wing know model condition could roll out its own drifting downwind speed match force wind definitely impervious influence wind since blithely floating air ocean aerodynamic soul leave ponder resulting relative wind airfoil both wingsand conse quently whatever angle attack exists model pursues its circular path constantlychanging relative wind increments years experience Don Srull have learned question nothing says scientist par excellence experienced aero nautical engineer constantly-winning modeler varied events Anything I better innocent comments man thinks like model believe pro asr ocean says what see what top cites Hewitt Phillips NASA did definitive analysis would bible subject Hewitt genius knew Indoor days early Thirties cannot argue Phillips says Don proved what see can take place backside gust think what see lightweight turning out wind precisely Hewitts gust condition effect model has created its 128 Model Aviation ao 10SASIFLIIIIG 13S.AAJ AZRCA L16BdhJa LIA5cN uaWpan 8 Luah. poem 6O 90 cun wiagapan 8 1uca power 2 ou L2R FOoT PLAN S1SZOOOZL TGLASS CL3SZOoOlL add 10% hiv A0 PLLZIS N PANTS PO 3 939 ZAH 11 11760 1 716 727O Classic U/C Scale iII sGRATL~ 40 Wing 15 25 Engines 5 0 IL SOMETHING NEW & BETTER! THE uii CWfWVTPf4 SPORT/TRAINER SIMPLE TO BUILD EASY TO FLY TRAINER -ORBUILD IT WITH AILERONS AND DO IT ALL OR WITH 05 ELECTRIC MOTOR 48 SPAN SQ IN 43 OZ SELECTED DIE AND MACHINE CUT BALSA AND PLYWOOD COMPLETE ROLLED PLANS STEP-BY-STEP INSTRUCTIONS ALL HARDWARE AND FORMED GEAR FLY WITH 20 FOUR CYCLE ENGINE ASK YOUR DEALER own back gust world dare say turns chases wind Turning wind effect creating gust-like environment head Its kinetic energy has converted something What really downwind turn way As Ken says downwind upwind has killed hundreds people can kill model go round float force bit dont bring up power youd expect strong wind Before war newly-soloed pilots some commercial guys 250 hours flew lightplanes over homesteads girl friends houses strong wind Theyd bank nicely wind gradually keep forcing circle rudder order see house gal simultaneously trying flatten angle bank ailerons cross controls theyd spin terrible mysterious problem until Leighton Collins explained great little magazine Air Facts As beginner wrote couple humble pieces him son editor Flying believe Argue among yourselves Dont bother pros cons share Willards comment Hey fellows lets knock off Just lets say some will lose altitude some wont will go out limb planes drift downwind Half-empty half-full glasses thats air oceanfor models anyway Bill Winter 4432 Altura Ct Fairfax VA 22030 Radio Technique/Myers Continued page 39 simultaneously order get some protection guy turns checking other users channel same scheme simultaneous use two RC channels imple mented way two parallel independent operating systems can also protect us disastrous consequences simple failures like battery exhaustion having battery antenna wire break pretty common occur rences Calvin Orr Custom Electronics recently loaned prototype Error Switch Normally Calvin supports simultaneous use two different bands such 50MHz 72 MHz goal investigate simultaneous use two 72 MHz frequencies Calvin says simultaneous use two 72 MHz channels including Error Detector switch ing can performed today minor modifications presently-available equipment already done Airtronics AM equipment using modified buddy-box connec tion Stage 2 tests Error Switch loaned came equipped 19 Airtronics connectors cheap way todays prices can buy two complete systems simply add Error Switch modified buddy-box cable join complete Redundant Radio system outlay $500 About Error Switch airborne Error Switch $149 item comes two flavors AM FM prototype AM type Error Switch samples both receiver outputs shuts down whichever receiver suffering inter ference FM version has bit sophisti cated order take care FMs capture Continued page 132 NEW FOX 4CycIe Special MIRACLE GLOW PLUG totally new concept glow plug design Instead using idle bar MIRACLE PLUG built pre-cotubustion chanther important thing plug retains heat better other know Try . 4-cycle motor 2-cycle motor also will get smoother throttle reslonse lrolably will able use less exlensive low nitro fuel Tests also show reduced fuel consumption cases WARNING motor Irobably will idle faster reset throttle erwise might able land Hard believe . course check out MIRACLE PLUG Just case 40702 4-Cycle Glow Plug $275 Manufacturing Company 5305 Towson Avenue Fort Smith AR 72901 October 1986 129 I DAVEY EMS CORPORATION E WOOD LANE MALVERN PA 19355 215 644-6772 dant-channel usage should able use two RC channels
Edition: Model Aviation - 1986/10
Page Numbers: 18, 19, 20, 21, 22, 24, 26, 128, 129
7Bill Winter~ LI________ Plane TaIL THE AVERAGE AGE 105000-plus AMA members 39 two years higher 1978 last curious Before anyone goes flap am Chicken Little sky falling never told nine kids must eat spinach cause its good know average age modelers has rising over 50 years since began 1927 ModelAirplane News 1929 kids gen eration identified Lindythe romance daring World War aces glamour early barnstormers Standards Jennies heroic air mail pilots like Jack Knight landed emergency fires auto headlights saw American Boy its plans Twenties-style appeal 300000 members AMLA preceded AMA starry-eyed Nationals trip prizes Olympics grew up wave modeling progress always complicated expen sive age curve really rose RC rich mans hobby Consider dollar volume aeromodeling industry today roughly $500000000 average member 39 yet born time already bewailing lack kids Relatively few us know another world exists Through entirely different outlets barely notice millions ROGs gliders other things sell substantial market thats around half century am reassured letters young people So much asked computer breakdown membership discovered have 11000 group under 19 smart cookies believe manage well things older folks also enjoy know put words thoughts together just finished building TD Coupe reports Mike OBryan 16-year-old What ask TD Coupe dont ask Mike appeared long ago MAN thought niftiest gassie see print Old-Timer designed Theodore Dykzoelwhere TD comes fromin 1936 graceful Old-Tim ers two factors consider before building Old-Timer continues Mike First foremost must pretty cause dont like aint gonna build Second like design isnt done very often ship fits both criteria first humbling effort covering silk although doubt will last yard white polka dot silk hobby shop has sitting bottom box since Wright brothers flew Kitty Hawk Im sucker fun crazy color schemes see two photos TD Coupes the left being Mikes other dads twist Young Mike covered silk dad preferred MonoKote Pop used fiberglass cowl Mike made balsa split middle access Mike blew up plans original 630 sq 900 Mikes silky aimed 60 oz caine out 64 K&B 40 SAM Society Antique Mod elers competition loading mere 1024 oz/sq ft Pops iron-on ship hit 12 OS 60 four-stroke Mike asked Pop would quicker trim spraying hand-painting told should take too long mask off hand-paint took Mike month paint sand trim Mike jokes dads 12-oz-loaded job proverbial lead sled loading similar Kaydet Sr makes Mike wonder Senior can soared expect Kaydet Sr soar fairly low-aspect wing mind ramble little Mike asks have something get off chest issue Junior problem Granted AMA card says Im Senior think am qualified enough give point view other side fence Mike have undivided attention column always melts down some place age instant gratification Mike advises us have fast foods drivethrough tellers banks commercial jets travel faster speed sound can get halfway across world matter hours overnight mall one-hour film processing super glues set seconds frozen foods get picture Whenever show friends hobby first comment make dont have patience fact some think Im crazy because cant imagine spending time building have possibility its being wiped out matter seconds Something else modeling fraternity has nt considered type young people hobby tends attract Generally athletic types have free time wrapped up organized sports therefore non-athletic likely participate hobby generalization isnt always true because other minor RC club 300 both engaged sports during school year other diversions like home computers people have days TV has infiltrated 99% American homes people have writing articles concerning problem blame cost dont really think problem because generally kid wants something hell save money until has enough Usually son daughter shows genuine interest something parents will help back financially Obviously hobby doesnt need expensive much does take make Control Line matter simple chuck glider usually kid thinks model alrplanes conjures up images expensive RC type am fortunate enough have father involved can honestly say pay about 90% hobby expenses through lawn mowing jobs have summer kids out have patience willing learn May relate experience couple years ago During summer sometimes get bored pass time Ill make chuckie fly front house until lands roof time made proved better flier anticipated None gliders ever great performance would stay up about seven seconds before crashing ground So took littie brother two chuckies over local grade school got eft Sixteen-year-old Mike 0Bryan enlarged plans TD Coupe 1936 MAN tram 630 900 sq TorSAM competition K&B 40 silk covered brush trimmed has split balsa cowl Hes designing 9-ft Ryson K&B 19 some 25 Claude Ryans elegant power/soarer retirement joy Right dad MonoKoted TO dont guys have covering preferences reversed 05 60 four-stroke power Mikes 64-oz beauty hess 1024 az/sq ft wing loading dads 12 oz Mike jokesthat itisa proverbial lead-sled 18 Model Aviation about eight nine years old romping around immediately gathered around started flying Three got bored after 15 minutes went back roughhousing stayed totally fascinated taught him throw correctly spent next two three hours throwing little chuckie around schoolyard didnt lose interest wings broke off wait 20 minutes Testors Green Tube cement back never saw kid again mistake because responsibility follow up Au Reminds Delta Dart promotions What Im trying point out kids Out up us find name Chris Register live Stone Mountain GA writes another upbeat young guy sounds running president have model aviation enthusiast since eight years old Au Now did get started am now 18 engineering student De Vry Technical Institute Decatur see other modelers have sent photo graphs have shown short write up Au positive approach am sending some photos recent project Gold berg Sky Tiger powered HB 40 ample power Believe actually flew slang word vocabulary skulter through whole Turnaround pat tern glitch bit sloppy maybe couldnt get flat spin satisfactorily chopped six inches off wing Man watch out Now its hard keep out em really admire old-timers keeping sport alive people like Au think means uns like dont think model aviation will ever die Thats about dont want take up too much flying time own philosophizing point out young guys dont instantly lock onto thing youll note Chris Comet T-Craft rubbe- job picked up three years ago K-Mart $159 Flies great says Chris urse.. Kids us am 70 years old have enjoyed building flying models ever since put plans old Boys Lfr John Van Ryzin checks Au John could have American Boy Milwaukee Journal used publish plans rubber-powered models Au Both Scripps-Howard Junior Aviators Hearst Junior Birdmenpapers big modelingprograms Remember old Aframe twin pushers made winders old egg beaters Lots fun Carved own left- right-hand props Au did some fun got RC retired married children gave Sanwa two-channel Andrews H-Ray What leaming experience powered Enya 15 III Control Line engine thought because flew Waco biplanes Stinson Trimotors full-scale ones flying model radio control leadpipe cinch 65 hand-to-eye coordination greatest conquered Au full-scale pilots have terrible time AC say miss feedback get seated cockpit overcontrol left-right nightmare versatile pilot know scares daylights out himself bystanders Tele masterwhich willfree flight its own dont bother stick whomping cure get up about 300 feet accept soothing words understanding low-key instructor stupid enough say give left right up down blows mind too fly straight lines back forth low power until find faith machine yourself get left-right stuff overcontrolling out system flew Control Line Stunt Combat well took 52-ft cables anchored CG cabin installed cable guide end wing flew H-Ray off schoolyard parking lot like CCW Control Line used spare tire car unimpressive pic rubber-powered T-crafttickles Winterto no end Chris says Comet Taylorcraft picked up local K-Mart $159 Its great flier too second airplane Sterling Citabria Chris states old can build like loved plane skills refined enough back fly very well Yes bitthe dust Young old theres lesson there. someplace adapter located center wheel adapter 1-in pipe center 3-fthigh broom handle mast top ofthe mast eight-penny nail could loop Du-Bro line connector over center pivot used stones weight tire would slip high speed centrifugal force made hundreds takeoffs landings Heres baby says 18-year-old Chris Register Goldberg Sky Tiger powered HB 40 unreal performance finally learned sustained inverted flight Winter says Chris later chopped off 6 span could inverted spins Heres Chris 14 Pilot GB 40 built friend Surprised him flew great Winter says 14 didnt know what ROG took him 30 years try fly things like Chris bomb Left This Antic still flies great 05 60 four-stroke after six years Right Lufberrys Nieuport has authentic instruments French complete cockpit folding gun rigging perthe original Shown OS 60 four-stroke Williams Bros LeRhone miniature Now has 05 90 four-stroke bar-stock LeRhone dummywe suppose needed additional nose weight power Actual size stated Let Scratch-built Aviantiker 0-3 part Antic part Aviatic part Rumpler Slow graceful OS 60 four-stroke Winter says Al should allow out night Right Dennyplane OS 40 four-stroke Takes off half-throttle cruises just above idle Au Evidently means Radio Control until gained enough courage let H-Ray go put small amounts fuel limit engine run no throttle control landing ending deadstick sure learns land way Happy day no crackups thought Id share idea anyone cannot get instructor help works fine ifyou have flown Control Line lot Any way can own first RC flight landed runway Walt Schroder hand-launched beast 7-ft 1947 RC Special rudder four-arm Good brothers escapement no throttle its Ohlsson 60 big stab hit Wait back head kept goingno Walts head talked out loud way landed huge argument over whether free-flighted piloted about loud bumping noise coming transmitter Walt couldnt hear itthough sounded like drum heart prepared flight Waits hold ing big ship aloft country kitchen calling maneuvers worked rudder innocent didnt know enough turn off escapement switch drove 60 miles next day find Ed Lorenz explained consequent mystery dead batteries too pilot never affected attempts fly RCone mans meat is.. Van Ryzin really wrote tell us about clever conversion Eaglet didnt know John Hunton did Screamin Eagle article August 1984 issue Model Aviation last T Ze Flying Circus Albert J Ward another ubiquitous Californian makes feel like blindfolded kid trying pin tail party donkey says model building led directly lifelong career never regretted moment it still fun Hes finished Sterling Ste arman powered OS 90 fourstroke spent three Navy years overhauling Stearmans Staggerwing Beechcrafts NAS Glenview weve few Nats hes added details can remember Spread beside display color photos wondrous variety intriguing ships say least reflect lifetime love affair character subjects hope get withjust few examples pleasureincluding Dennyplanewhich what will write about Due recent columns am flooded Dennyplanes said Midway kit fleet Telemasters spoilers carrying gliders go fly Sunday may encounter 25 Telemasters half spoil ers half gliders topand some both well flaps spoilersand perhaps 20 Model Aviation pictures page just part Al Wards Squadron Left OB 60 monster 0S 90 four-stroke provides air borne launch Marks Models Wanderer Spanning 82 has servo-operated hatch dropping whatever Above No3 Martin Handasyde version French Antoinette 9/48 scale spans 73 0S four-stroke shown now has Salto 45 four-stroke Lateral con trol provided bywing warping King postsand wires galore sprung wire-spoke wheels nose-over skid brasstank radiators pilot 10 Dennyplanes few zooted up ailerons less dihedral get picture Actually Ward gave 4-K kit friend summer vacation surprise friend presented Al ajewel fall framed ready go Al installed OS 40 four-stroker three-channel grossed 4 lb takeoff Gremlins tossed him series glitches resulting series sharp nose-up-and-down undulations high-G roller coaster wing snapped ird zig Kapow bears discussion first let Al tell paid much attention center section already framed up checked drawings built exactly plans entire frame glued Titebond Au think means OK Apparently wing plan shows wing Reginald Denny -even ers mi capal lion ir J wr igr designed strong enough added stresses weight RC flying recom mends future Dennyplane pushers beef up dihedral joints add webbing front spar least halfway out able salvage bird replacing beautiful engine cowl Au lovely cowl seems fascinate us aluminum panworks fine Denny flies just fine slow stable quick take off slow landing Takes off about half throttle cruises just above idle Au Thats fun-perfect tf under powered dont want ha twothirds throttle max takeoff OldTimer Should beef up Denny know will never break wing Old-Timer because fly gently through open loops wish snaps etc Id carry something extra out least one-third semi span across centerline lightly-built design balsa spars absolutely no penalty much insurance substituting same size spruce spars Id stab spar Id build Denny unmodified except Al has described concerns flat-bottom wings possibility radio malfunction would duplicate Als experience Broken wings common RCs early wi lere now eping c alre othy Ott sougn ked afteri nt ughnut shops d Doi rica Cai Banif everyw ould sc imore ing g agian say Hal all flat-bottomed phugoid pitching can fatal Guys would nose over dive pass vertical pull Out elevator killed Lincoln Beachey point exe cute vertical S try enter inverted half outside can flat-bottoms attain sustained inverted abort panic pull sharp split-S varying loads flat-bottom wing flown verge catastrophic youll need spruce sparsand webbing way out Doc Mathews keeps preaching Ive beenhackingbalsawoodsince 1932 am still trying get right comments too modestly Im retired United Airlines After 40 years full-size maintenance can now devote time smaller ones flies Bay area sites getting problem weather permits year-round flying first successful Free Flight inverted Gwinn Aero placed far down 1940 Nats Bantam-engined third-placer 1949 Plymouth Internats still alive sure does have time little ones including OS 40 four-stroke Flying Quaker Super Cyke Buzzard Bombshell Electric Play boy Viking Also Antic sorta-bipe Antic Top Flite J-3 Proctor Nieuport ye Continued page 22 October 1986 21 Sans spinner pic Winters new electric Heron 565 sq area has Robbe/Mabuichi motor cabin extension drive big Robbe folder Does 15 20 mm before dusk three trips max altitude six seven winch tow height Gear removes has yet flown way Has eight 1 2s 075 motor Draws 16 amps static though 28to 35 amps have reported others using com parable setups prop Schmitt pic 1-mm charge Ni-Cd booster Don Srull gets 2 mm FF Pietenpol powered tiny M RC FF electric motor two 100 mAh cells Williams plastic prop plane bigger outdoor CO-2 less fuss Field limits charge Schmit pic See anything different Gordon Stahls Gee Bee Bright red-and-wfllte scneme painted Used Aero Span Balsa USA Missing stab uses Evans/Simitar airfoil Get lust Plone emphasis product rather production Bob Godfrey Precision Built Models Kits creates custom planes very particular customers 1 / 3 scale Laser 200s built Tournament Champions evolved / 3 1 / 4 scale kits newest kit Phoenix 9 continues high standards Precision Built Models previously achieved Bob always striving improve Laser Kits Built Wings Laser Built Bones product building techniques both practical innovative Bob always willing give building engine advice anyone calls case repairs needed may purchase single wing fuse wood parts need Precision Built Models get just kit get service Bobs planes becoming popular planes fly 1/3 1/4 $ 35000$ 22900 6750037500 Laser CoveredBud Light Decals9500050000 Ready Fly eng & Radio Instal12000075000 Universal Receiver Battery Packing Sleeves Ties $250 Phoenix 9 complete kits $15995 Built up prices same 1 / 4 scale Laser Plans parts available Freight included Direct Sales Only P~c-Iskiin Haul Bob Godfrey/ 1818 6th Ave W Bradenton Florida 33505 813-747-7006 gods Martin-Handasyde like Antoinette Falcon 56 Headmaster 40 Q13 60 Monster Dennyplane Jr original Bantam FF Mini-Hogan FF rubber-powered Midwest Gol lywock Comet Sparky coupis Pea nuts .. Ken Willard dont box car column dreamed about Ken go back long way wed talk New York hotel room waited midnight Connie Sleeper LA Hes forgotten about air planes Ill ever know dont argue him seems Ken once published someones analysis claiming prove plane turning upwind downwind 180 will lose altitude Mine always did letters over world can believe own experience Id bet came textbook theorists no hands-on experience Note although plane turned into-thewind path downwind direction Ken did designate infamous killer downwind turn nor reference far fact plane trimmed cruise cruise poweror glider will loses altitude turning out wind will regain coming back wind assuming handsoff stable requires no interfering control inputs Ken told guys bug off like debate over angels can dance head pin paper chase went onand Ken almost lost cool July RCM lets leave Ken fascinating column hold.. want trombones hoary debate drips mossy tendrils definitive confrontation tween authorities took place Flying years ago Results Yer pays money takes yer cherce call basic syndrome Air Ocean pro air ocean theory postulate turning airplane part drifting air mass impervious outside inputs Usually airliner etc pictured 360 over say Pacific say 30000 ft youll never notice anything either aone ortwo needle-width turn heavy fast airplane since its airspeed relative wind encounters far cry model airspeed may compete wind half equal bad day alight moderately-powered plane its velocity plane really impervious its 360 true circle its 360 flight path has elongated downwind abbreviated upwind legs its related ground path naturally much distorted eye earthbound viewer may things wonder about tight 360 performed Cub 50 mph wind much comparable models making hands off 360 same wind Hands off means no control inputs used Entry requires gentlest inputso lets assume second 360 720 years pros said nothing about inertia kinetic energy cons claim factor Both sides argue whether changes direction influenced momentum cons say moving mass will tend continue its already-established direction argue results reduced airflow over wing downwind portion circle hence lowered airspeed consequent change angle attack leading nefarious down wind turn shenanigans ie downwind wind have caused full-scale plane well model fall out air Below will find that Ken shows Continued page 24 22 Model Aviation * Special Detergents help prevent varnish promote clean burning * Rust Preventatives protect expensive engines corrosion SIG CHAMPION 2-STROKE FUEL FREIGHT FREE SHIPPING ON ORDERS OVER $1500COLLECT PINTQUARTGALLON55 GAL DRUM 0% Nitromethane$315$450$1050$19000 5% Nitromethane$365$525$1250$25800 10% Nitromethane$415$550$1450$32500 15% Nitromethane$430$625$1650$38500 25% Nitromethane$495$750$2095$52000 35% Nitromethane$575$875$2495$66000 SIGPREMIUM4-STROKE FUEL 10% Nitromethane$415$550$1395$29500 15% Nitromethane$425$625$1595$35900 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending fuel finest quality ingredients available alcohol 995% pure very best grade available nitromethane use 100% pure get honest portion based % volume maximum lubrication get perfect 50/50 blend Bakers AA Castor Oil Klotz Techniplate Racing Oil protect expensive engines finest quaiity fuel can made price Dont take word try some judge yourself l See dealer first available order direct Call ri 800-247-5008 toll free orders Latest Catalog $300 ~LJ SIG MANUFACTURING CO Montezuma IA 50171 Prices sutitect chanee notice Hands Off Cut II Especially Designed Tapered Wings HANDS OFF CUT II unique device cutting high quality foam wing cores hands off also cuts both sides same time Most modelers will amazed high quality smooth surface will achieve using device plus added advantage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam components such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble s approximately 15 minutes Dealers Wanted Hands Off Cut II Hardware Pkgl $8750 plus $3 ship ft hand 24 Volt Variable Output Power Supply$5250 pius $3 ship ft hand //5 NORRAY PRODUCTS INC __________ 5008 Sandbeach Road Wichita Falls TX 76310 Tel 81716924475 VISA 11 oversimplification key question being whether kinetic energy momentum inertia whatever relative earth indicates air prefer go latter interpretation Aside saw good pilot bring big MAN Monocoupea fine modelover fence against strong wind slightly dip tip recover quickly nice go-round 360 entering approach again downwind fell like stone pilot Quarter Scale expert recovery 360 continued direction slightly dropped wing back over fence out good wind old approach path what considered enough added power flying Mono relative earth safe eye needed much power airspeed wider recovery pattern what appeared ade quate reader wonders about years old Kougar doing same thing excellent plane Another lost Stolph Starlet same way though crack flier asks have clues common denominator dreaded downwind turn opposing viewpoints will probably never reconciled Example two aero engineers high-time pilots expert model fliers pursued debate bitter end have files access finest scientific brains organizationsand mean biggies team least six organizations proved its case disproved others What think Ken just published thorough article math Thermalist newsletter Soaring Society East Tennessee sup posedly settles matter Kens words article proved yer takes yer cherce always kinetic energy relative ground key factor downwind furor Ken trotted out box car scrambled poor brain box car travels down track speed matching wind speed flies Indoor model constant 360s airspeed model 20mph Its speed inside box car traveling downwind 20mph flies against wind zero relative ground As circles downwind airspeed 40 mph 20mph relative moving car Ken asks Does model climb going against wind lose altitude downwind expected kinetic energy relative ground speed air nightmare true box car jerked instantaneous stop jerked instantly 20 mph again Didthe circling model remain center car dreams have meaning seeing circle Control Line lower wing tip center earth Since model banked turn its wing loading highertrue things fly tightlybanked Spitfire stalls 250 mph Still fog imagined model flying around pylon CL fashion being gravity Does matter box car goes Now half awake realize two things box car en capsulated box air model being Free Flight subject full range ac celeration/deceleration results RC control inputsthat pilot errors Does Kens model know upwind downwind within its moving encapsulated chunk still air sure dont know Note Ken does discount kinetic energy asks rather think relative ground air choice words suggests thinks relative air think him correctbut am Kinetic energy involves mass speed flying machine no kinetic energyno tenContinued page 26 24 Model Aviation ALL PURPOSE FOAM CU1TER POSI CURE CYANOACRYLATE SPECIAL INTRODUCTORY OFFER List Sale Savings 1 oz Fast Cure 3-5 Sec495$2450% Off 2 oz Fast Cure 3-5 Sec895$39656% Off 1 oz Gap-Filling 5 Sec495$249500/a Off 2 oz Gap-Filling 5 Sec895$39656% Off OUR GUARANTEE TO YOU satisfied P051-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 3157 Alum Rock Ave Jose CA 95127 FOR ORDERS ONLY PLEASE 800 228-3237 2514789 SHIPPING Out State INFO 408 251-0787 Californiaper order Hour Mon-Wed Fr & Sat 930-530 FAST SERVICE 930-900 1200-500 COD ADD $190 dency remain motion maintain direction resist changes direction certainly would affect flight path plane could fly flying machine possesses no kin etic energy airspeed balloon zero wind stabilized fixed altitude Considerthis too An unintentional spin entry usually deadly snap differs inten tional spin entry plane slowed level flight stall occurs rudder jammed direction wanted spin accidental spin can entered out bottom over top Modelers say wing outside circle traveling faster therefore spin out bottom slower-moving wing quits Yet snaps over top training over-the-top entry executed maintaining slightly banked climbing turn top wing quits eventually Cub will roll over top entering spin right what left climbing turn suspect reason tad down aileron required maintained left climbing turn washin condition whereas slower lower wing its slight up aileron has washout course neutral ailerons present much normal flying would probably see over-the-top entry unless plane steeply banked high-speed turn time have seen model snap under such conditions over topsuch 09-pow ered little Scale foamie racked around too far downwind three-channel ship aileron position factor true downwind turn back wind pilot always yelled interference High-speed secondary stalls un known vast majority modelers Years ago Cdr Green invented stall warning indicator interviewed him Interavia fourlanguageeditionsSwiss aero journal partial stall Bonanza recovery horizon plenty power level flight reestablished ship feeling solid flew straight out good indicated airspeed after lapse seconds warning indicator intoned series tiny beeps plane stall region Obviously still power required Until side other gives up sin openminded comes air ocean genesis debate know models conformprobably because comparable condi tions necessary laboratory situation cannot created Hands now no flying moving aircraft carrier proof recently print Einsteins train inside Kens box car calm air Ive set up lightlyloaded low-powered craft perform 360s 720s hands off no changes altitude wind always lose altitude downwind side regain upwind flight circle tilted disk Proves nothing guess view Kens question whetherthat altitude loss due kinetic energy relative ground speed earthor air What see easily rubber good breeze wind strikes underside plane begins its hoped-for 360 low power high-pitch prop its climb poor nonexistent downwind leg prop slows down seems flail air airspeed obviously off though ground speed may great coming around wind plane will zoomespecially flat-bottom foil rpm picks up toowhich sometimes re sults stalls whip stalls Lift appears tremendously maguified point Continued page 128 26 Model Aviation ROUSH KITS TaylorCraft Full span 108 Area 1670 clipped 84 Area 1300 Power 75 12 Cu Oalaa&PIy 10-l2lbe $11996 Super Sport 120 Span 73 Area 960 Power 75 12 Cu Ifl $9996 Super Kwik Fli Span 70 Area 927 Power 75 12 Cu Ifl $8996 Two Ugly Stick Span 70 Area 1290 Power 75 12 Cu $9995 Jr Sticks Span 72 Area 1080 Power 75 12 Cu $7996 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1728 Dywood St SE Canton Ohio 44707 2144644610 THE LEADER IN COMPETITION PROPELLERS NEW 4 CYCLE SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHELATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 12 66A778 299 136778379 146778479 1567689 16678989 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 53/i34149 634149 72833A456179 83344568189 8/4566A7199 94566A77199 104566A7209 106W8W209 106EW219 114677778229 115W229 116EW239 11I67239 124W279 125W279 1256279 1356349 1456459 1556659 164AN969 16678969 RO PYLON RACING SERIES 500 DIAPITCHPRICE 7SN 5N279 8I67/7I8299 SERIES 400C 8/66777289 9777289 W WIDE BLADE EW EXTRA WIDE N NARROW cssI coazr tNDED Safety/Preston Continued page 16 Balsa knives Up point months column has offered advice us build internal-combustion engine-powered models As postscript comes safety message Scale Staffel newsletter should interest modelers came way Bill Winter author Just Fun column magazine Some five years ago reported incident also relayed via Bill concerned modeler bled death after cut himself leg balsa knife knives can hazardous Consider following tip Scale Staffel newsletter editor dont know name JP hobby knife quietly roll off work bench drop lap bury entire length blade right inner thigh bad news wound got infected very painful good news did land mere two inches left 25 cents could purchase cheapest surance life sketch accompanied Scale Staffel newsletter safety tip showed soft vinyl triangular-shaped sleeve handle knife Apparently can obtained sta tionary stores about 25 50 cents tended slipped onto pencils prevent rolling off tables desks etc claimed such sleeve does interfere use knife may actually help grip handle Have safe month John Preston Model Aviation 1810 Samuel Morse Drive Reston Virginia 22090 Plane Talk/Winter Continued page 26 fly rudder-only RC jobs know can lose downwind out sightunable penetrate after downwind turns down wind portion circle sideways drift lightweight ship revealed wind blowing against top plane Such changes display wind airspeed changing relative other points circle since wind relative wing changing angle attack kinetic energy involved know upon turning wind plane can slow abruptly some reason go climb Dealers Distributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC P 0 Box 2136 Fan-tax Vrgnia 32031 U 5 stall As varying airspeed 360 model find certaln three-channel RC models slow respond rudder downwind sideso much some like Rebel can barely brought back wind rudder action powerful Airspeed over rudder going downwind less no argument therefore less over entire plane including wing plane must accelerate downwind leg malntaln its original speed relative wind So its obvious eye wind time sorta blowing model along say Get out way two Gordon Light Rubber Commer cialsa sport version Wakefield winner flew beautifully gentle wind strong wind always spiraled ground downwind segment circle added dihedral problem vanished no way Rebel GL model could blissfully drifting air ocean Suppose wind As Gordon Light model banks front you see its top dihedral has the top wing see less see lower wing ridiculously large dihedral would see wind large expanse upper wing little nothing lower wing other extremethat no dihedral assuming model banked verticallyyoud see equal area both upper lowerbanked wing know model condition could roll out its own drifting downwind speed match force wind definitely impervious influence wind since blithely floating air ocean aerodynamic soul leave ponder resulting relative wind airfoil both wingsand conse quently whatever angle attack exists model pursues its circular path constantlychanging relative wind increments years experience Don Srull have learned question nothing says scientist par excellence experienced aero nautical engineer constantly-winning modeler varied events Anything I better innocent comments man thinks like model believe pro asr ocean says what see what top cites Hewitt Phillips NASA did definitive analysis would bible subject Hewitt genius knew Indoor days early Thirties cannot argue Phillips says Don proved what see can take place backside gust think what see lightweight turning out wind precisely Hewitts gust condition effect model has created its 128 Model Aviation ao 10SASIFLIIIIG 13S.AAJ AZRCA L16BdhJa LIA5cN uaWpan 8 Luah. poem 6O 90 cun wiagapan 8 1uca power 2 ou L2R FOoT PLAN S1SZOOOZL TGLASS CL3SZOoOlL add 10% hiv A0 PLLZIS N PANTS PO 3 939 ZAH 11 11760 1 716 727O Classic U/C Scale iII sGRATL~ 40 Wing 15 25 Engines 5 0 IL SOMETHING NEW & BETTER! THE uii CWfWVTPf4 SPORT/TRAINER SIMPLE TO BUILD EASY TO FLY TRAINER -ORBUILD IT WITH AILERONS AND DO IT ALL OR WITH 05 ELECTRIC MOTOR 48 SPAN SQ IN 43 OZ SELECTED DIE AND MACHINE CUT BALSA AND PLYWOOD COMPLETE ROLLED PLANS STEP-BY-STEP INSTRUCTIONS ALL HARDWARE AND FORMED GEAR FLY WITH 20 FOUR CYCLE ENGINE ASK YOUR DEALER own back gust world dare say turns chases wind Turning wind effect creating gust-like environment head Its kinetic energy has converted something What really downwind turn way As Ken says downwind upwind has killed hundreds people can kill model go round float force bit dont bring up power youd expect strong wind Before war newly-soloed pilots some commercial guys 250 hours flew lightplanes over homesteads girl friends houses strong wind Theyd bank nicely wind gradually keep forcing circle rudder order see house gal simultaneously trying flatten angle bank ailerons cross controls theyd spin terrible mysterious problem until Leighton Collins explained great little magazine Air Facts As beginner wrote couple humble pieces him son editor Flying believe Argue among yourselves Dont bother pros cons share Willards comment Hey fellows lets knock off Just lets say some will lose altitude some wont will go out limb planes drift downwind Half-empty half-full glasses thats air oceanfor models anyway Bill Winter 4432 Altura Ct Fairfax VA 22030 Radio Technique/Myers Continued page 39 simultaneously order get some protection guy turns checking other users channel same scheme simultaneous use two RC channels imple mented way two parallel independent operating systems can also protect us disastrous consequences simple failures like battery exhaustion having battery antenna wire break pretty common occur rences Calvin Orr Custom Electronics recently loaned prototype Error Switch Normally Calvin supports simultaneous use two different bands such 50MHz 72 MHz goal investigate simultaneous use two 72 MHz frequencies Calvin says simultaneous use two 72 MHz channels including Error Detector switch ing can performed today minor modifications presently-available equipment already done Airtronics AM equipment using modified buddy-box connec tion Stage 2 tests Error Switch loaned came equipped 19 Airtronics connectors cheap way todays prices can buy two complete systems simply add Error Switch modified buddy-box cable join complete Redundant Radio system outlay $500 About Error Switch airborne Error Switch $149 item comes two flavors AM FM prototype AM type Error Switch samples both receiver outputs shuts down whichever receiver suffering inter ference FM version has bit sophisti cated order take care FMs capture Continued page 132 NEW FOX 4CycIe Special MIRACLE GLOW PLUG totally new concept glow plug design Instead using idle bar MIRACLE PLUG built pre-cotubustion chanther important thing plug retains heat better other know Try . 4-cycle motor 2-cycle motor also will get smoother throttle reslonse lrolably will able use less exlensive low nitro fuel Tests also show reduced fuel consumption cases WARNING motor Irobably will idle faster reset throttle erwise might able land Hard believe . course check out MIRACLE PLUG Just case 40702 4-Cycle Glow Plug $275 Manufacturing Company 5305 Towson Avenue Fort Smith AR 72901 October 1986 129 I DAVEY EMS CORPORATION E WOOD LANE MALVERN PA 19355 215 644-6772 dant-channel usage should able use two RC channels