ONE Sport Scales attractionsfor both specta tors contestantsis fact models teresting obscure aircraft can compete available documentation too sparse ex acting AMA Precision Scale FAT Scale stan dards Designed 1915 DFW T-28 such air craft design represented sole proto type its configuration bizarre Yet ways quite advanced time sported full engine cowl flush wing radiator wingspan little 20 ft Perhaps T-28 short fat Early WW 1 design style called walfisch whale wide brief popularity Ger featured deep fuselage completely filled gap between biplane wings Fok ker experimented type M-16 ever believe Roland manufac turer have production run walfisch two-seated C-Il However DFW T-28 remains ex treme example fad Its probable sim plification assembly alignment procedures major objective designs During war delivery German aircraft fac tory airfields near frontand move ment operational squadrons new field some distance oldwas usually accom plished loading disassembled aircraft rail road flatcars along tent hangars other squadron equipment Incidentally resemblance train loaded cargo old-fashioned circus train led custom calling Jadgescwaders Joes T-28 disassembles ease transport maintenance Lots neat tricks usedand tells column Note similarity cowl jack-o-lantern L external bracing functional Assembly field involves 12 screws takes matter few minutes ST 90H engine surrounded baffles capture direct cooling airflow L Equipment box houses radio gear Fuel tank will sit top Module easy remove servicing Joe has developed scheme making WW I-type landing gear structure R over years 44 Model Aviation Radio Cono Scale Joe Tschirgi 1641 Wltitestone Santa Ana CA 92705 Author Joe Tschirgi claims doesnt build strange modelshe builds models strange air craft large Scale model one-of-a-kind 1915 DFW T-28 probably extreme example German walfiach whale school aircraft design Read fighter groups Plying Circuses event rail transportation combined minor crackups nose-overs ground loops etc meant ground crews spent much time assembling disassembling aircraft walfisch style undoubtedly helped ground crews aircrews stuck air craft having poor visibility its pilot have photo prototype T-28 being taxied pi lot standing its cockpit effort see over nose little-known facts modeldom Free Flight models high drag easier adjust stable flight aerodynamically slick configurations Anyone has studied dy namics will recognize drag damping fac tor pitch maneuvers stall/dive sequences loops etc fact together universal attraction something different led build Free Flight T-28 spring 1978 Success 16-in-to-the-ft model pow ered Cox 049 swinging seven-inch prop lulled belief larger RC machine would cinch flyan Ugly Stick Scale world So proceeded current ver sion pictured month Its exactly twice Free Flight versions size Powered Superti gre 90H engine H standing Helicopter versionsee photo heat-sink-style cyl inder head swinging 16-in prop larger scale yields span 65 maximum fuselage depth 20 dry weight 12 lb Its first flight nearly disaster pitch control less normal directional con trol almost impossible achieve would bank right turn leftand vice versa strug gled around sky hoping practice could learn fly thing about 10 mm gave excellent smallscale version old air show act classic Drunk Pilot Lightplane Ill always re member Dick Granere wearing top hat tails performing front seat Curtiss Junior some 53 years ago Chicago Hed pull up ground level tail slide Anyway eventually abandoned first tempt fly T-28 normally controlled fashion closed throttle waited evitable crash l3ut power directional control improved landed insignificant damage problem has resolved least part adopting full differential aileron movement trailing edge aileron moves up down small departure scale will remain nameless interest future Scale points last T-28 has reasonable nonaerobatic flight characteristics once its air Takeoffs particularly difficult hold full Up ele vator plant tail skid firmly ground un til some airspeed attained generally good policy tail-dragger tends ground loop However landing T-28 accident wait ing happen Someone once foolish enough allow fly Space Shuttle Landing Simulator NASA Houston Its typical simulators used almost everyone days train pilots large aircraft sit cockpit full-scale mockup actual vehicle through windshield see video projection airport computer interprets what effect pilots movement controls would have full-scale craft causes video projec tion airfield change move ap propriate manner airfield gets larger Continued page 149 Fully HALF crashes can traced dead dying receiver batteries New Plane Saver Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 x 1 x 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 6 volts Works 4 5 cell packs capacity used servo normal reversed mode adjustment sets failsafe throttle limit 0% 1000/s failsafe throttle works normally up set point ttle operates normally failsafe mode atible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additionalList price $3995Introductory offer $2995 APPLIED EIIGIrIEERIIIG 214 241-6060 PO Box 5100 Carrollton TX 75006 division ot Research Corporation Prices subject chaste notice r ~~1reproudto announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP, February 1990 45 later youll see need HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 Another First McDaniel RIC New Solid State On-Board Glow-Plug Dilvers Now con dtive 1 2 glow plugs efficiently ond outomatically new McDaniel On-Boord Glow-Plug Drivers engine iso 2 4 stroke glow hos 1 2 cylinders o Model 471 472 On-Board Glow-Plug Dver will ease jobs starting ond maintaining idle during taxiing power down flighf moneuvers FEATURtS INCLUDE Servo Reversing Optically Coupled Circuitry No RFI Automatic Shutdown Via TX RX Connector Plug Battery Pack Remote Glow Plug Indicator Panels Available Separately Battery Pack AC Charger NOT Included Available Separately McDaniel R/C IncVisa MC accepted 1654 Crofton Blvd Suite 4 Crofton MD 21114 e 301721-6303 301721-6306 NEW ELECTRIC Fly . t stand-way-off scale fun ship designed forO5 electric power can per-form take-offs touch goes aerobatics beauty yet enjoy docile slow flight easy landings Quick aid easy build kit includes pre cut fuselage sides tail feathers small parts hardware complete rolled plans step-by-step instructions formed landing gear windshield Electro-combo includes kit DSC 075 Hyperth rust motor fused switch iharness Tamiya connector propeller adaptor 8/4 fiberglass propeller 40 Span 275 Sq area 32 oz flying ht flat bottom airfoil rudder elevator motor add ailerons too rII%r$I795 IIAVEY675 TOWER LANE SPECIAL COMBOYSTEMSWEST CHESTE1 PA 19380 BASIC KIT $29IORPoRATIoN 215430 8045 Typically given homemade test setup will have some way affixing motor/prop combo mechanism ultimately displays thrust propeller pull ounces Some provision al ways made vary measure power input rpm swap motors propellers usual purpose pursuit seems to deter whats best combination motor bat tery prop friends lose cause motors batteries dont develop thrust per se So Im exactly sure mean ing whats best way see given prop given rpm displays given thrust thats spin ning propeller develops thrust whatever thats providing energy spin itbe electric motor steam engine twisted elastic bands motion ocean clockwork dylith ium crystal engines hand crank life form treadmill forgive gas enginedoes matter put different words prop some rpm displays some particular thrust level will display same thrust same rpm no matter what turns Now can certainly understand conve nience using ati electric motor aid evaluation comparison props thrust What have problem impression somehow particular motor/battery makes difference end thrust result What ever prop its rpm/thrust often several motor/battery combos will job turning Now seriously pursue thrust fashion Ive described somehow Ive missed point please let know Ill pass good info along future column everyones benefit might make up some such instrumentation myself Mean thanks have taken time share photos data etc Im sorry blew Im certainly willing try again OK Speed controls have topic covered last few columns now have brief followup coverage As promised last month since asked Futaba Electric re ceiver built-in speed control uses framerate speed control design personally borrowed measured know case Its interesting note receiver has become very popular locality also seems work well Unfortunately its limited sevencell motor battery packs relatively small mo tors feature dont particularly care automatic motor shutdowna built-in fea ture BEC battery eliminator circuit designcan catch surprise rea son prefer separate receiver battery Im hoping Futabas marketing set has significant success well see biggerand-better receiver/speed-control combos come along future sure makes installations sim pler folks Let close noting beginning whole new flying year will scene just about time youre reading Happy Quiet Landings everyone throughout 1990 RC Scale/Tschirgi Continued page 45 approach rotates apply aileron etc remarkably realistic three landing attempts NASA simula tor destroyed orbiter killed myself three times Experiences T-28 have similar Both machines have odd characteris tic After establishing slow glide path run way attempting flare flare term used describe pitch maneuver used slow descent aircraft nears ground landing approachthe pilot pulls back control column raises nose vehicleEd will rotate vehicle ac tion has little effect crafts velocity vector continues unabated ground char acteristic product wings having very low aspect ratio overall design high parasitic drag lots exterior surface area first glance T-28 would seem have reasonable aspect ratio biplane since span-to-chord ratio about 51 interplane gap vertical distance between two wingsEd exceeds chord However deter mining effective aspect ratio multiplane complex question case T-28 ex cessive gap between four wing roots fu selage tends reduce designs aerodynamics two separate biplane cells aspect ration about 21 Thus total config uration has effective aspect ratio little 20 keep T-28s approach speed high manage properly flare troubles far over planes high center-ofgravity narrow-track landing gear poor aerodynamic directional stability combine pro duce inevitable ground loop unless Im flying grass landing directly brisk breeze youve gotten impression Id recommend model card-carrying maso chists youre right T-28 model does corporate few interesting design features have proven number models nay general interest Continued page 1S3 February 1990 149 0 THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great performance Thermal Charger cne Wing Span Wing Area Motor included 60 Inches 545 Sq Inches Leisure 05 Electric %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 RC Scale/Tschirgi Continued page 149 large-scale biplane pays think through assembly/disassembly procedures equipment access options very thoroughly before beginning construction its someone elses designyou may have better idea one-piece wings nonfunctional nonexistent brace wires usual practice nonscale wire-braced bi planes concerned results model either heavier weaker could achieved scalelike approach also prefer make everything removable wings con trol surfaces tail landing gear etc small models facilitates finishing general maintenance repairs eventual refinishing large model can necessity unless own very big van take field Some techniques used making T-28 easy disassemble revealed photo partially disassembled model Wings four separate panels plug fuselage supported functional brace cables Both lift landing cables black-nylon-coated stranded steel outside diameter OD about 035 standard fishing leader available mos[ good fishing tackle stores Note stranded cable scale WW aircraft wire bracing except post-1915 British planes streamlined solid RAF wire came use time Connection loops made passing ca ble twice through short length slightly flat tened %2-OD aluminum tubing tubing squeezed flat smooth-jawed pliers drop CyA glue end tube com pletes job Noncritical bracing such X between interplane struts drag wire top rear strut cowl similar-diame ter nylon monofilament same fishing tackle shop latter dyed black common fabric dye ends finished same end-loop technique steel ones Individual monofilament braces slightly shorter length required natural elasticity provides necessary tension hold everything togetner Functional turnbuckles ends landing flying cables remain fixed length during normal assembly/disassembly procedures During assembly lower wings first plugged fuselage attached land ing cables means #4 screws having lengths initially left external allows lower wings droop slightly other photos show next step Interplane struts 4-in thin-walled K&S aluminum tub ing ends flattened internal /16 gap remains Balsa fairings added tubing shaped achieve proper strut cross sec tion strut ends simply fit onto bayonet fit tings screwed both upper lower wings fittings cut 3A-in aluminum angle having /16 thickness No positive strut attachment used Brace-cable tension holds place upper wing bayonet fittingswhich removed wing during disassembly left attached lift cablesare plugged top interplane struts Lower wing droop allows done loosening turnbuckles Upper wings now plugged fuselage bayonet fittings attached two #4 screws per fitting Fully tightening landing ca ble attach screws tensions lift landing ca bles establishes proper dihedral monofilament braces attached between hooks incorporated bayonet fittings total 12 screws must installed dur ing operation use socket-head screws re duces time required few minutes Functional turnbuckles use ones Du Bro look scale also allow accurate adjustment dihedral all-important wing twist Its difficult overemphasize value washout wing trailing edge near tip warped up Scale models perfect pilots would useful real world its best defense against snap rolling ground slow down too much land ing approach pull ground suffi cient airspeed day before writing lines witnessed beautiful A-scale Jungmeister snap roll its first-flight takeoff check remains re vealed washin wing trailing edge near tip warped down both lower wing panelsa cer tain invitation disaster just recent numerous cases Scale model rollitis Ive seen past 30-odd years Most could have prevented couple de grees washout People will spend hours locat ing models CG very precisely ig nore wing twist later wonder what hap pened tendency toward tail-heaviness trait com mon Scale models Light tail aft fuse lage structure lacking designs obvious cure problem However forwardmounted radio equipment may also necessary avoid brute force lead-in-the-nose solutionparticularly WW types course presents modeler access prob lems biplanes conventional solution one-piece lower wing things really pushed up against firewall access awkward best Fifty years ago old-time Free Flighters used different solution Im certain first devel oped scheme certainly Carl Goldberg popul arized 1938-39 designs engine firewall removable unit electrical equipment spark coil batteries timer mounted rack attached back firewall allowed both complete access light rigid fuselage hatches LATHES ING MACHINES MACHINE SHOP SUPPLES S / MACHINERY ARC OIS INC PO Ron S3-Y HadEloan WV 25525 t 5523538 REPRESENTATIVES OF MANY MANUFACTURERS NEW CAPALOG SnUGZ Flu oR I. numb 0400 NUNtIOU _______STARLI TEST~ FLIGHT T 13 WIJO SIN NAIQ-tALl4O Q8 TO OWJ 15*4 TO FlY 15c FLIGHTS COMPlETE DETAiLED 8 - MAI8JAL BALSA & HARI7AOOO IT 55Y5 lrssoddA5S last ojIR JAMMAERQ P0 So. OiL AJINk 23303 m cal 804 824 0514 pism md $250 i*pindRCIRF REqEmEN RW*Rd February 1990 153 r WORLDS BIGGEST SC5LE PLANS & DOCUMENTATION SERVICE U nLEIOflEL PLANS80OO*,I 50 PACE CATALOGA VESWS U EQ US LOnAAI, pp,, Souse Ps,no oPnonoSenoce PLANS ENLARGING3039 Madison 50. OnnnnSnn NE 17403 SCALE OEEUMENTATINU919003-5239 Someone once said no new ideas adaptations old ones True observa tion T-28 model mounts RC equipment box hack removable firewall-andengine unit Since engine cooling air passes through firewall exits out cockpit box enclosed protect electronics Though probably necessary considering short flight times involved cool air separately routed box Servo pushrods operate gang five bellcranks connect aerodynamic controls two servos ailerons two elevators rudder bellerank unit perma nently attached fuselage structure open ing servo pushrods quick-links entire engine/firewall/equipment box assembly may removed controls remain attached bellerank gang Access pushrod quicklinks through cockpit takes 10 15 minutes remove assembly access equipment very easy wings can re main attached fuselage some years Ive used certain design scheme landing gears models WW air craft has satisfactory Its both sturdy light has functional rubber shock cords easily repairable photos illustrates use scheme T-28 landing gear Struts 1/6-diameter aluminum tubing having 035 wall thickness have flattened oval cross section clamping between wood blocks Both strut ends have further flattened / gap between walls upper end receives short /16 sheet aluminum spacer fill gap before its drilled 6-32 machine screw mounts fuselage bottom end slips over i/~ sheet aluminum crotch fitting Again no fixed attachment used assembly main tained tension functional cable braces tach crotch Thin-wall stainless steel tubing old auto radio antenna %2 dia used axle two spreader bars 544.dia steel tub ing normally used auto hydraulic brake lines axle retained several #62 rubberbands wrapped around lower crotch tongue Spreader tubes slip over plastic-tubing-covered ends 4-40 machine screws protrude inside crotch Spreader bars again fixed brace-cable tension holding place photo landing gear components shows other bits Going outward crotch parts slider fits over axle pre vent pinching rubber shock cords short length rubber tube auto heater hose CyAd slider brass nylon washers side wheel cotter pin retain wheel changing materials sizes scheme scales up down nicely fact works well quite small Free Flights using thin-wall K&S aluminum tubes monoftlament brace wires Larger sizes steel aluminum tubing obtainable aircraft supply houses tf youre near let suggest Aircraft Spruce Specialty Co. 201 W Trueslow Ave Ful lerton CA 92632 mail order specialize serving home builder full-scale aircraft carry things useful builder large Scale models obtainable typical model shop include closed-cell styrene blue urethane foams impervious dope thinners kinds high-tech fibers both standard low-shrink dopes Incidentally anyone builds models larger Peanut Scale should buying dope thin ner gallon unless totally addicted iron-on stuff companys mam moth catalog expensive its worthwhile since has much how-to information compos ites epoxies dopes plastics metals last article MA about year ago men tioned desirability engine-cooling baffles pressure cowls Scale models stan dard full-scale practice Pressure maintained having air-exit area smaller inlet trick baffling simply make mini mum area around engine cylinder ie air enters cowl must exit between baf fle cylinder photos shows baffling system used T-28s Supertigre 90 case homemade box muffler forms left-hand side baffle other two pieces 016 aluminum sheet attached firewall Exiting air passes through firewall out cock pit idea force high-speed flow about cylinder therefore baffles must close cylinder Perry regulator pump shown same photo baffles highly recommended al lows engine started choking permits fuel tank placed remote lo cation problem though true direct-injection pump Once engine flooded must pinch off fuel line clear engine regulator set low pressure flooding wont happen sim ply crank engine until fires card-carrying masochists additional DFW T-28 information sources Air Interna tional March 1978 description plane Photos may Rare Birds Man ty Pat Groves 791 Nisqually Dr Sunny vale CA 94087 RC Soaring/Blakeslee Continued page 49 pictured Dans article falls away very steeply east Jurg said finest slope Bernese Oberland wind direction tonight westerly zephyr gently blowing up broad ski slope lying west Jurg Martin displayed light-air versatility slow-flight capabilities Speedos flying forma tion close along ridge kept going until almost too dark see planes back dining room nightcap two model talk few fliers brought musical instruments pretty lively folk music dancing going Some pilots over old hotel 154 Model Aviation HANDSOFFCUTII Especially Designed tar Tapered Wings unique device cutting high quality foam wing cores HANDS OFF cutting both sides same time Avaitable hardware package assemble own board-Specify 30 -40 -50 60 ordering Size may changed anytime Max Chord tandard ILarger chords availablel Easy assemble Requires 24 Volt Variable Output Power Supply DEALERS WANTED Hands Off Cut II Iharaware packagel$8750 S & H 24 Volt Variable output power supply$8250 S & H VIDEO FOAM SHOP Foam Shop Part OneCutting Foam Wings hour long cuts made using HANDS OFF CUT II VHSOnly $2995 includes S & H lower 48 Foam Shop Part TwoCutting Foam Fuselages hour long cuts made using simple bow VHSOnly $2995 includes S & H lOwer 48 SUPER BOND CONTACT ADHESIVE best contact cement bane ever used Only $375 8 oz squeeze bottle Enougs 1400 square inch wingAdd $200 S & H lower 48 118 inch Phenolic Board Templates 4536r sq ftOnly $500 S & H NOR-RAY PRODUCTS INC 5008 Sandbeach Road VISAWichita Falls Texas 76310 Tet f817 324476 1/4-SCALE PLANS FROM FACTORY BLUEPRINTS See cate i/U M008181 uctooer 00 Wing Loading 18 ozsi Span 78 inches Weight 825 lbs Area 1053 inches 46-61 2/Cycle Plans rolled manual Spaceman decals $3000 PPD Cowls pants Fiberglass Master Dry Ridge Models 59 MoCurry Road704 658-2663 Weaervilla NC 28787
Edition: Model Aviation - 1990/02
Page Numbers: 44, 45, 149, 153, 154
ONE Sport Scales attractionsfor both specta tors contestantsis fact models teresting obscure aircraft can compete available documentation too sparse ex acting AMA Precision Scale FAT Scale stan dards Designed 1915 DFW T-28 such air craft design represented sole proto type its configuration bizarre Yet ways quite advanced time sported full engine cowl flush wing radiator wingspan little 20 ft Perhaps T-28 short fat Early WW 1 design style called walfisch whale wide brief popularity Ger featured deep fuselage completely filled gap between biplane wings Fok ker experimented type M-16 ever believe Roland manufac turer have production run walfisch two-seated C-Il However DFW T-28 remains ex treme example fad Its probable sim plification assembly alignment procedures major objective designs During war delivery German aircraft fac tory airfields near frontand move ment operational squadrons new field some distance oldwas usually accom plished loading disassembled aircraft rail road flatcars along tent hangars other squadron equipment Incidentally resemblance train loaded cargo old-fashioned circus train led custom calling Jadgescwaders Joes T-28 disassembles ease transport maintenance Lots neat tricks usedand tells column Note similarity cowl jack-o-lantern L external bracing functional Assembly field involves 12 screws takes matter few minutes ST 90H engine surrounded baffles capture direct cooling airflow L Equipment box houses radio gear Fuel tank will sit top Module easy remove servicing Joe has developed scheme making WW I-type landing gear structure R over years 44 Model Aviation Radio Cono Scale Joe Tschirgi 1641 Wltitestone Santa Ana CA 92705 Author Joe Tschirgi claims doesnt build strange modelshe builds models strange air craft large Scale model one-of-a-kind 1915 DFW T-28 probably extreme example German walfiach whale school aircraft design Read fighter groups Plying Circuses event rail transportation combined minor crackups nose-overs ground loops etc meant ground crews spent much time assembling disassembling aircraft walfisch style undoubtedly helped ground crews aircrews stuck air craft having poor visibility its pilot have photo prototype T-28 being taxied pi lot standing its cockpit effort see over nose little-known facts modeldom Free Flight models high drag easier adjust stable flight aerodynamically slick configurations Anyone has studied dy namics will recognize drag damping fac tor pitch maneuvers stall/dive sequences loops etc fact together universal attraction something different led build Free Flight T-28 spring 1978 Success 16-in-to-the-ft model pow ered Cox 049 swinging seven-inch prop lulled belief larger RC machine would cinch flyan Ugly Stick Scale world So proceeded current ver sion pictured month Its exactly twice Free Flight versions size Powered Superti gre 90H engine H standing Helicopter versionsee photo heat-sink-style cyl inder head swinging 16-in prop larger scale yields span 65 maximum fuselage depth 20 dry weight 12 lb Its first flight nearly disaster pitch control less normal directional con trol almost impossible achieve would bank right turn leftand vice versa strug gled around sky hoping practice could learn fly thing about 10 mm gave excellent smallscale version old air show act classic Drunk Pilot Lightplane Ill always re member Dick Granere wearing top hat tails performing front seat Curtiss Junior some 53 years ago Chicago Hed pull up ground level tail slide Anyway eventually abandoned first tempt fly T-28 normally controlled fashion closed throttle waited evitable crash l3ut power directional control improved landed insignificant damage problem has resolved least part adopting full differential aileron movement trailing edge aileron moves up down small departure scale will remain nameless interest future Scale points last T-28 has reasonable nonaerobatic flight characteristics once its air Takeoffs particularly difficult hold full Up ele vator plant tail skid firmly ground un til some airspeed attained generally good policy tail-dragger tends ground loop However landing T-28 accident wait ing happen Someone once foolish enough allow fly Space Shuttle Landing Simulator NASA Houston Its typical simulators used almost everyone days train pilots large aircraft sit cockpit full-scale mockup actual vehicle through windshield see video projection airport computer interprets what effect pilots movement controls would have full-scale craft causes video projec tion airfield change move ap propriate manner airfield gets larger Continued page 149 Fully HALF crashes can traced dead dying receiver batteries New Plane Saver Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 x 1 x 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 6 volts Works 4 5 cell packs capacity used servo normal reversed mode adjustment sets failsafe throttle limit 0% 1000/s failsafe throttle works normally up set point ttle operates normally failsafe mode atible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additionalList price $3995Introductory offer $2995 APPLIED EIIGIrIEERIIIG 214 241-6060 PO Box 5100 Carrollton TX 75006 division ot Research Corporation Prices subject chaste notice r ~~1reproudto announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP, February 1990 45 later youll see need HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 Another First McDaniel RIC New Solid State On-Board Glow-Plug Dilvers Now con dtive 1 2 glow plugs efficiently ond outomatically new McDaniel On-Boord Glow-Plug Drivers engine iso 2 4 stroke glow hos 1 2 cylinders o Model 471 472 On-Board Glow-Plug Dver will ease jobs starting ond maintaining idle during taxiing power down flighf moneuvers FEATURtS INCLUDE Servo Reversing Optically Coupled Circuitry No RFI Automatic Shutdown Via TX RX Connector Plug Battery Pack Remote Glow Plug Indicator Panels Available Separately Battery Pack AC Charger NOT Included Available Separately McDaniel R/C IncVisa MC accepted 1654 Crofton Blvd Suite 4 Crofton MD 21114 e 301721-6303 301721-6306 NEW ELECTRIC Fly . t stand-way-off scale fun ship designed forO5 electric power can per-form take-offs touch goes aerobatics beauty yet enjoy docile slow flight easy landings Quick aid easy build kit includes pre cut fuselage sides tail feathers small parts hardware complete rolled plans step-by-step instructions formed landing gear windshield Electro-combo includes kit DSC 075 Hyperth rust motor fused switch iharness Tamiya connector propeller adaptor 8/4 fiberglass propeller 40 Span 275 Sq area 32 oz flying ht flat bottom airfoil rudder elevator motor add ailerons too rII%r$I795 IIAVEY675 TOWER LANE SPECIAL COMBOYSTEMSWEST CHESTE1 PA 19380 BASIC KIT $29IORPoRATIoN 215430 8045 Typically given homemade test setup will have some way affixing motor/prop combo mechanism ultimately displays thrust propeller pull ounces Some provision al ways made vary measure power input rpm swap motors propellers usual purpose pursuit seems to deter whats best combination motor bat tery prop friends lose cause motors batteries dont develop thrust per se So Im exactly sure mean ing whats best way see given prop given rpm displays given thrust thats spin ning propeller develops thrust whatever thats providing energy spin itbe electric motor steam engine twisted elastic bands motion ocean clockwork dylith ium crystal engines hand crank life form treadmill forgive gas enginedoes matter put different words prop some rpm displays some particular thrust level will display same thrust same rpm no matter what turns Now can certainly understand conve nience using ati electric motor aid evaluation comparison props thrust What have problem impression somehow particular motor/battery makes difference end thrust result What ever prop its rpm/thrust often several motor/battery combos will job turning Now seriously pursue thrust fashion Ive described somehow Ive missed point please let know Ill pass good info along future column everyones benefit might make up some such instrumentation myself Mean thanks have taken time share photos data etc Im sorry blew Im certainly willing try again OK Speed controls have topic covered last few columns now have brief followup coverage As promised last month since asked Futaba Electric re ceiver built-in speed control uses framerate speed control design personally borrowed measured know case Its interesting note receiver has become very popular locality also seems work well Unfortunately its limited sevencell motor battery packs relatively small mo tors feature dont particularly care automatic motor shutdowna built-in fea ture BEC battery eliminator circuit designcan catch surprise rea son prefer separate receiver battery Im hoping Futabas marketing set has significant success well see biggerand-better receiver/speed-control combos come along future sure makes installations sim pler folks Let close noting beginning whole new flying year will scene just about time youre reading Happy Quiet Landings everyone throughout 1990 RC Scale/Tschirgi Continued page 45 approach rotates apply aileron etc remarkably realistic three landing attempts NASA simula tor destroyed orbiter killed myself three times Experiences T-28 have similar Both machines have odd characteris tic After establishing slow glide path run way attempting flare flare term used describe pitch maneuver used slow descent aircraft nears ground landing approachthe pilot pulls back control column raises nose vehicleEd will rotate vehicle ac tion has little effect crafts velocity vector continues unabated ground char acteristic product wings having very low aspect ratio overall design high parasitic drag lots exterior surface area first glance T-28 would seem have reasonable aspect ratio biplane since span-to-chord ratio about 51 interplane gap vertical distance between two wingsEd exceeds chord However deter mining effective aspect ratio multiplane complex question case T-28 ex cessive gap between four wing roots fu selage tends reduce designs aerodynamics two separate biplane cells aspect ration about 21 Thus total config uration has effective aspect ratio little 20 keep T-28s approach speed high manage properly flare troubles far over planes high center-ofgravity narrow-track landing gear poor aerodynamic directional stability combine pro duce inevitable ground loop unless Im flying grass landing directly brisk breeze youve gotten impression Id recommend model card-carrying maso chists youre right T-28 model does corporate few interesting design features have proven number models nay general interest Continued page 1S3 February 1990 149 0 THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great performance Thermal Charger cne Wing Span Wing Area Motor included 60 Inches 545 Sq Inches Leisure 05 Electric %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 RC Scale/Tschirgi Continued page 149 large-scale biplane pays think through assembly/disassembly procedures equipment access options very thoroughly before beginning construction its someone elses designyou may have better idea one-piece wings nonfunctional nonexistent brace wires usual practice nonscale wire-braced bi planes concerned results model either heavier weaker could achieved scalelike approach also prefer make everything removable wings con trol surfaces tail landing gear etc small models facilitates finishing general maintenance repairs eventual refinishing large model can necessity unless own very big van take field Some techniques used making T-28 easy disassemble revealed photo partially disassembled model Wings four separate panels plug fuselage supported functional brace cables Both lift landing cables black-nylon-coated stranded steel outside diameter OD about 035 standard fishing leader available mos[ good fishing tackle stores Note stranded cable scale WW aircraft wire bracing except post-1915 British planes streamlined solid RAF wire came use time Connection loops made passing ca ble twice through short length slightly flat tened %2-OD aluminum tubing tubing squeezed flat smooth-jawed pliers drop CyA glue end tube com pletes job Noncritical bracing such X between interplane struts drag wire top rear strut cowl similar-diame ter nylon monofilament same fishing tackle shop latter dyed black common fabric dye ends finished same end-loop technique steel ones Individual monofilament braces slightly shorter length required natural elasticity provides necessary tension hold everything togetner Functional turnbuckles ends landing flying cables remain fixed length during normal assembly/disassembly procedures During assembly lower wings first plugged fuselage attached land ing cables means #4 screws having lengths initially left external allows lower wings droop slightly other photos show next step Interplane struts 4-in thin-walled K&S aluminum tub ing ends flattened internal /16 gap remains Balsa fairings added tubing shaped achieve proper strut cross sec tion strut ends simply fit onto bayonet fit tings screwed both upper lower wings fittings cut 3A-in aluminum angle having /16 thickness No positive strut attachment used Brace-cable tension holds place upper wing bayonet fittingswhich removed wing during disassembly left attached lift cablesare plugged top interplane struts Lower wing droop allows done loosening turnbuckles Upper wings now plugged fuselage bayonet fittings attached two #4 screws per fitting Fully tightening landing ca ble attach screws tensions lift landing ca bles establishes proper dihedral monofilament braces attached between hooks incorporated bayonet fittings total 12 screws must installed dur ing operation use socket-head screws re duces time required few minutes Functional turnbuckles use ones Du Bro look scale also allow accurate adjustment dihedral all-important wing twist Its difficult overemphasize value washout wing trailing edge near tip warped up Scale models perfect pilots would useful real world its best defense against snap rolling ground slow down too much land ing approach pull ground suffi cient airspeed day before writing lines witnessed beautiful A-scale Jungmeister snap roll its first-flight takeoff check remains re vealed washin wing trailing edge near tip warped down both lower wing panelsa cer tain invitation disaster just recent numerous cases Scale model rollitis Ive seen past 30-odd years Most could have prevented couple de grees washout People will spend hours locat ing models CG very precisely ig nore wing twist later wonder what hap pened tendency toward tail-heaviness trait com mon Scale models Light tail aft fuse lage structure lacking designs obvious cure problem However forwardmounted radio equipment may also necessary avoid brute force lead-in-the-nose solutionparticularly WW types course presents modeler access prob lems biplanes conventional solution one-piece lower wing things really pushed up against firewall access awkward best Fifty years ago old-time Free Flighters used different solution Im certain first devel oped scheme certainly Carl Goldberg popul arized 1938-39 designs engine firewall removable unit electrical equipment spark coil batteries timer mounted rack attached back firewall allowed both complete access light rigid fuselage hatches LATHES ING MACHINES MACHINE SHOP SUPPLES S / MACHINERY ARC OIS INC PO Ron S3-Y HadEloan WV 25525 t 5523538 REPRESENTATIVES OF MANY MANUFACTURERS NEW CAPALOG SnUGZ Flu oR I. numb 0400 NUNtIOU _______STARLI TEST~ FLIGHT T 13 WIJO SIN NAIQ-tALl4O Q8 TO OWJ 15*4 TO FlY 15c FLIGHTS COMPlETE DETAiLED 8 - MAI8JAL BALSA & HARI7AOOO IT 55Y5 lrssoddA5S last ojIR JAMMAERQ P0 So. OiL AJINk 23303 m cal 804 824 0514 pism md $250 i*pindRCIRF REqEmEN RW*Rd February 1990 153 r WORLDS BIGGEST SC5LE PLANS & DOCUMENTATION SERVICE U nLEIOflEL PLANS80OO*,I 50 PACE CATALOGA VESWS U EQ US LOnAAI, pp,, Souse Ps,no oPnonoSenoce PLANS ENLARGING3039 Madison 50. OnnnnSnn NE 17403 SCALE OEEUMENTATINU919003-5239 Someone once said no new ideas adaptations old ones True observa tion T-28 model mounts RC equipment box hack removable firewall-andengine unit Since engine cooling air passes through firewall exits out cockpit box enclosed protect electronics Though probably necessary considering short flight times involved cool air separately routed box Servo pushrods operate gang five bellcranks connect aerodynamic controls two servos ailerons two elevators rudder bellerank unit perma nently attached fuselage structure open ing servo pushrods quick-links entire engine/firewall/equipment box assembly may removed controls remain attached bellerank gang Access pushrod quicklinks through cockpit takes 10 15 minutes remove assembly access equipment very easy wings can re main attached fuselage some years Ive used certain design scheme landing gears models WW air craft has satisfactory Its both sturdy light has functional rubber shock cords easily repairable photos illustrates use scheme T-28 landing gear Struts 1/6-diameter aluminum tubing having 035 wall thickness have flattened oval cross section clamping between wood blocks Both strut ends have further flattened / gap between walls upper end receives short /16 sheet aluminum spacer fill gap before its drilled 6-32 machine screw mounts fuselage bottom end slips over i/~ sheet aluminum crotch fitting Again no fixed attachment used assembly main tained tension functional cable braces tach crotch Thin-wall stainless steel tubing old auto radio antenna %2 dia used axle two spreader bars 544.dia steel tub ing normally used auto hydraulic brake lines axle retained several #62 rubberbands wrapped around lower crotch tongue Spreader tubes slip over plastic-tubing-covered ends 4-40 machine screws protrude inside crotch Spreader bars again fixed brace-cable tension holding place photo landing gear components shows other bits Going outward crotch parts slider fits over axle pre vent pinching rubber shock cords short length rubber tube auto heater hose CyAd slider brass nylon washers side wheel cotter pin retain wheel changing materials sizes scheme scales up down nicely fact works well quite small Free Flights using thin-wall K&S aluminum tubes monoftlament brace wires Larger sizes steel aluminum tubing obtainable aircraft supply houses tf youre near let suggest Aircraft Spruce Specialty Co. 201 W Trueslow Ave Ful lerton CA 92632 mail order specialize serving home builder full-scale aircraft carry things useful builder large Scale models obtainable typical model shop include closed-cell styrene blue urethane foams impervious dope thinners kinds high-tech fibers both standard low-shrink dopes Incidentally anyone builds models larger Peanut Scale should buying dope thin ner gallon unless totally addicted iron-on stuff companys mam moth catalog expensive its worthwhile since has much how-to information compos ites epoxies dopes plastics metals last article MA about year ago men tioned desirability engine-cooling baffles pressure cowls Scale models stan dard full-scale practice Pressure maintained having air-exit area smaller inlet trick baffling simply make mini mum area around engine cylinder ie air enters cowl must exit between baf fle cylinder photos shows baffling system used T-28s Supertigre 90 case homemade box muffler forms left-hand side baffle other two pieces 016 aluminum sheet attached firewall Exiting air passes through firewall out cock pit idea force high-speed flow about cylinder therefore baffles must close cylinder Perry regulator pump shown same photo baffles highly recommended al lows engine started choking permits fuel tank placed remote lo cation problem though true direct-injection pump Once engine flooded must pinch off fuel line clear engine regulator set low pressure flooding wont happen sim ply crank engine until fires card-carrying masochists additional DFW T-28 information sources Air Interna tional March 1978 description plane Photos may Rare Birds Man ty Pat Groves 791 Nisqually Dr Sunny vale CA 94087 RC Soaring/Blakeslee Continued page 49 pictured Dans article falls away very steeply east Jurg said finest slope Bernese Oberland wind direction tonight westerly zephyr gently blowing up broad ski slope lying west Jurg Martin displayed light-air versatility slow-flight capabilities Speedos flying forma tion close along ridge kept going until almost too dark see planes back dining room nightcap two model talk few fliers brought musical instruments pretty lively folk music dancing going Some pilots over old hotel 154 Model Aviation HANDSOFFCUTII Especially Designed tar Tapered Wings unique device cutting high quality foam wing cores HANDS OFF cutting both sides same time Avaitable hardware package assemble own board-Specify 30 -40 -50 60 ordering Size may changed anytime Max Chord tandard ILarger chords availablel Easy assemble Requires 24 Volt Variable Output Power Supply DEALERS WANTED Hands Off Cut II Iharaware packagel$8750 S & H 24 Volt Variable output power supply$8250 S & H VIDEO FOAM SHOP Foam Shop Part OneCutting Foam Wings hour long cuts made using HANDS OFF CUT II VHSOnly $2995 includes S & H lower 48 Foam Shop Part TwoCutting Foam Fuselages hour long cuts made using simple bow VHSOnly $2995 includes S & H lOwer 48 SUPER BOND CONTACT ADHESIVE best contact cement bane ever used Only $375 8 oz squeeze bottle Enougs 1400 square inch wingAdd $200 S & H lower 48 118 inch Phenolic Board Templates 4536r sq ftOnly $500 S & H NOR-RAY PRODUCTS INC 5008 Sandbeach Road VISAWichita Falls Texas 76310 Tet f817 324476 1/4-SCALE PLANS FROM FACTORY BLUEPRINTS See cate i/U M008181 uctooer 00 Wing Loading 18 ozsi Span 78 inches Weight 825 lbs Area 1053 inches 46-61 2/Cycle Plans rolled manual Spaceman decals $3000 PPD Cowls pants Fiberglass Master Dry Ridge Models 59 MoCurry Road704 658-2663 Weaervilla NC 28787
Edition: Model Aviation - 1990/02
Page Numbers: 44, 45, 149, 153, 154
ONE Sport Scales attractionsfor both specta tors contestantsis fact models teresting obscure aircraft can compete available documentation too sparse ex acting AMA Precision Scale FAT Scale stan dards Designed 1915 DFW T-28 such air craft design represented sole proto type its configuration bizarre Yet ways quite advanced time sported full engine cowl flush wing radiator wingspan little 20 ft Perhaps T-28 short fat Early WW 1 design style called walfisch whale wide brief popularity Ger featured deep fuselage completely filled gap between biplane wings Fok ker experimented type M-16 ever believe Roland manufac turer have production run walfisch two-seated C-Il However DFW T-28 remains ex treme example fad Its probable sim plification assembly alignment procedures major objective designs During war delivery German aircraft fac tory airfields near frontand move ment operational squadrons new field some distance oldwas usually accom plished loading disassembled aircraft rail road flatcars along tent hangars other squadron equipment Incidentally resemblance train loaded cargo old-fashioned circus train led custom calling Jadgescwaders Joes T-28 disassembles ease transport maintenance Lots neat tricks usedand tells column Note similarity cowl jack-o-lantern L external bracing functional Assembly field involves 12 screws takes matter few minutes ST 90H engine surrounded baffles capture direct cooling airflow L Equipment box houses radio gear Fuel tank will sit top Module easy remove servicing Joe has developed scheme making WW I-type landing gear structure R over years 44 Model Aviation Radio Cono Scale Joe Tschirgi 1641 Wltitestone Santa Ana CA 92705 Author Joe Tschirgi claims doesnt build strange modelshe builds models strange air craft large Scale model one-of-a-kind 1915 DFW T-28 probably extreme example German walfiach whale school aircraft design Read fighter groups Plying Circuses event rail transportation combined minor crackups nose-overs ground loops etc meant ground crews spent much time assembling disassembling aircraft walfisch style undoubtedly helped ground crews aircrews stuck air craft having poor visibility its pilot have photo prototype T-28 being taxied pi lot standing its cockpit effort see over nose little-known facts modeldom Free Flight models high drag easier adjust stable flight aerodynamically slick configurations Anyone has studied dy namics will recognize drag damping fac tor pitch maneuvers stall/dive sequences loops etc fact together universal attraction something different led build Free Flight T-28 spring 1978 Success 16-in-to-the-ft model pow ered Cox 049 swinging seven-inch prop lulled belief larger RC machine would cinch flyan Ugly Stick Scale world So proceeded current ver sion pictured month Its exactly twice Free Flight versions size Powered Superti gre 90H engine H standing Helicopter versionsee photo heat-sink-style cyl inder head swinging 16-in prop larger scale yields span 65 maximum fuselage depth 20 dry weight 12 lb Its first flight nearly disaster pitch control less normal directional con trol almost impossible achieve would bank right turn leftand vice versa strug gled around sky hoping practice could learn fly thing about 10 mm gave excellent smallscale version old air show act classic Drunk Pilot Lightplane Ill always re member Dick Granere wearing top hat tails performing front seat Curtiss Junior some 53 years ago Chicago Hed pull up ground level tail slide Anyway eventually abandoned first tempt fly T-28 normally controlled fashion closed throttle waited evitable crash l3ut power directional control improved landed insignificant damage problem has resolved least part adopting full differential aileron movement trailing edge aileron moves up down small departure scale will remain nameless interest future Scale points last T-28 has reasonable nonaerobatic flight characteristics once its air Takeoffs particularly difficult hold full Up ele vator plant tail skid firmly ground un til some airspeed attained generally good policy tail-dragger tends ground loop However landing T-28 accident wait ing happen Someone once foolish enough allow fly Space Shuttle Landing Simulator NASA Houston Its typical simulators used almost everyone days train pilots large aircraft sit cockpit full-scale mockup actual vehicle through windshield see video projection airport computer interprets what effect pilots movement controls would have full-scale craft causes video projec tion airfield change move ap propriate manner airfield gets larger Continued page 149 Fully HALF crashes can traced dead dying receiver batteries New Plane Saver Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 x 1 x 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 6 volts Works 4 5 cell packs capacity used servo normal reversed mode adjustment sets failsafe throttle limit 0% 1000/s failsafe throttle works normally up set point ttle operates normally failsafe mode atible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additionalList price $3995Introductory offer $2995 APPLIED EIIGIrIEERIIIG 214 241-6060 PO Box 5100 Carrollton TX 75006 division ot Research Corporation Prices subject chaste notice r ~~1reproudto announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP, February 1990 45 later youll see need HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 Another First McDaniel RIC New Solid State On-Board Glow-Plug Dilvers Now con dtive 1 2 glow plugs efficiently ond outomatically new McDaniel On-Boord Glow-Plug Drivers engine iso 2 4 stroke glow hos 1 2 cylinders o Model 471 472 On-Board Glow-Plug Dver will ease jobs starting ond maintaining idle during taxiing power down flighf moneuvers FEATURtS INCLUDE Servo Reversing Optically Coupled Circuitry No RFI Automatic Shutdown Via TX RX Connector Plug Battery Pack Remote Glow Plug Indicator Panels Available Separately Battery Pack AC Charger NOT Included Available Separately McDaniel R/C IncVisa MC accepted 1654 Crofton Blvd Suite 4 Crofton MD 21114 e 301721-6303 301721-6306 NEW ELECTRIC Fly . t stand-way-off scale fun ship designed forO5 electric power can per-form take-offs touch goes aerobatics beauty yet enjoy docile slow flight easy landings Quick aid easy build kit includes pre cut fuselage sides tail feathers small parts hardware complete rolled plans step-by-step instructions formed landing gear windshield Electro-combo includes kit DSC 075 Hyperth rust motor fused switch iharness Tamiya connector propeller adaptor 8/4 fiberglass propeller 40 Span 275 Sq area 32 oz flying ht flat bottom airfoil rudder elevator motor add ailerons too rII%r$I795 IIAVEY675 TOWER LANE SPECIAL COMBOYSTEMSWEST CHESTE1 PA 19380 BASIC KIT $29IORPoRATIoN 215430 8045 Typically given homemade test setup will have some way affixing motor/prop combo mechanism ultimately displays thrust propeller pull ounces Some provision al ways made vary measure power input rpm swap motors propellers usual purpose pursuit seems to deter whats best combination motor bat tery prop friends lose cause motors batteries dont develop thrust per se So Im exactly sure mean ing whats best way see given prop given rpm displays given thrust thats spin ning propeller develops thrust whatever thats providing energy spin itbe electric motor steam engine twisted elastic bands motion ocean clockwork dylith ium crystal engines hand crank life form treadmill forgive gas enginedoes matter put different words prop some rpm displays some particular thrust level will display same thrust same rpm no matter what turns Now can certainly understand conve nience using ati electric motor aid evaluation comparison props thrust What have problem impression somehow particular motor/battery makes difference end thrust result What ever prop its rpm/thrust often several motor/battery combos will job turning Now seriously pursue thrust fashion Ive described somehow Ive missed point please let know Ill pass good info along future column everyones benefit might make up some such instrumentation myself Mean thanks have taken time share photos data etc Im sorry blew Im certainly willing try again OK Speed controls have topic covered last few columns now have brief followup coverage As promised last month since asked Futaba Electric re ceiver built-in speed control uses framerate speed control design personally borrowed measured know case Its interesting note receiver has become very popular locality also seems work well Unfortunately its limited sevencell motor battery packs relatively small mo tors feature dont particularly care automatic motor shutdowna built-in fea ture BEC battery eliminator circuit designcan catch surprise rea son prefer separate receiver battery Im hoping Futabas marketing set has significant success well see biggerand-better receiver/speed-control combos come along future sure makes installations sim pler folks Let close noting beginning whole new flying year will scene just about time youre reading Happy Quiet Landings everyone throughout 1990 RC Scale/Tschirgi Continued page 45 approach rotates apply aileron etc remarkably realistic three landing attempts NASA simula tor destroyed orbiter killed myself three times Experiences T-28 have similar Both machines have odd characteris tic After establishing slow glide path run way attempting flare flare term used describe pitch maneuver used slow descent aircraft nears ground landing approachthe pilot pulls back control column raises nose vehicleEd will rotate vehicle ac tion has little effect crafts velocity vector continues unabated ground char acteristic product wings having very low aspect ratio overall design high parasitic drag lots exterior surface area first glance T-28 would seem have reasonable aspect ratio biplane since span-to-chord ratio about 51 interplane gap vertical distance between two wingsEd exceeds chord However deter mining effective aspect ratio multiplane complex question case T-28 ex cessive gap between four wing roots fu selage tends reduce designs aerodynamics two separate biplane cells aspect ration about 21 Thus total config uration has effective aspect ratio little 20 keep T-28s approach speed high manage properly flare troubles far over planes high center-ofgravity narrow-track landing gear poor aerodynamic directional stability combine pro duce inevitable ground loop unless Im flying grass landing directly brisk breeze youve gotten impression Id recommend model card-carrying maso chists youre right T-28 model does corporate few interesting design features have proven number models nay general interest Continued page 1S3 February 1990 149 0 THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great performance Thermal Charger cne Wing Span Wing Area Motor included 60 Inches 545 Sq Inches Leisure 05 Electric %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 RC Scale/Tschirgi Continued page 149 large-scale biplane pays think through assembly/disassembly procedures equipment access options very thoroughly before beginning construction its someone elses designyou may have better idea one-piece wings nonfunctional nonexistent brace wires usual practice nonscale wire-braced bi planes concerned results model either heavier weaker could achieved scalelike approach also prefer make everything removable wings con trol surfaces tail landing gear etc small models facilitates finishing general maintenance repairs eventual refinishing large model can necessity unless own very big van take field Some techniques used making T-28 easy disassemble revealed photo partially disassembled model Wings four separate panels plug fuselage supported functional brace cables Both lift landing cables black-nylon-coated stranded steel outside diameter OD about 035 standard fishing leader available mos[ good fishing tackle stores Note stranded cable scale WW aircraft wire bracing except post-1915 British planes streamlined solid RAF wire came use time Connection loops made passing ca ble twice through short length slightly flat tened %2-OD aluminum tubing tubing squeezed flat smooth-jawed pliers drop CyA glue end tube com pletes job Noncritical bracing such X between interplane struts drag wire top rear strut cowl similar-diame ter nylon monofilament same fishing tackle shop latter dyed black common fabric dye ends finished same end-loop technique steel ones Individual monofilament braces slightly shorter length required natural elasticity provides necessary tension hold everything togetner Functional turnbuckles ends landing flying cables remain fixed length during normal assembly/disassembly procedures During assembly lower wings first plugged fuselage attached land ing cables means #4 screws having lengths initially left external allows lower wings droop slightly other photos show next step Interplane struts 4-in thin-walled K&S aluminum tub ing ends flattened internal /16 gap remains Balsa fairings added tubing shaped achieve proper strut cross sec tion strut ends simply fit onto bayonet fit tings screwed both upper lower wings fittings cut 3A-in aluminum angle having /16 thickness No positive strut attachment used Brace-cable tension holds place upper wing bayonet fittingswhich removed wing during disassembly left attached lift cablesare plugged top interplane struts Lower wing droop allows done loosening turnbuckles Upper wings now plugged fuselage bayonet fittings attached two #4 screws per fitting Fully tightening landing ca ble attach screws tensions lift landing ca bles establishes proper dihedral monofilament braces attached between hooks incorporated bayonet fittings total 12 screws must installed dur ing operation use socket-head screws re duces time required few minutes Functional turnbuckles use ones Du Bro look scale also allow accurate adjustment dihedral all-important wing twist Its difficult overemphasize value washout wing trailing edge near tip warped up Scale models perfect pilots would useful real world its best defense against snap rolling ground slow down too much land ing approach pull ground suffi cient airspeed day before writing lines witnessed beautiful A-scale Jungmeister snap roll its first-flight takeoff check remains re vealed washin wing trailing edge near tip warped down both lower wing panelsa cer tain invitation disaster just recent numerous cases Scale model rollitis Ive seen past 30-odd years Most could have prevented couple de grees washout People will spend hours locat ing models CG very precisely ig nore wing twist later wonder what hap pened tendency toward tail-heaviness trait com mon Scale models Light tail aft fuse lage structure lacking designs obvious cure problem However forwardmounted radio equipment may also necessary avoid brute force lead-in-the-nose solutionparticularly WW types course presents modeler access prob lems biplanes conventional solution one-piece lower wing things really pushed up against firewall access awkward best Fifty years ago old-time Free Flighters used different solution Im certain first devel oped scheme certainly Carl Goldberg popul arized 1938-39 designs engine firewall removable unit electrical equipment spark coil batteries timer mounted rack attached back firewall allowed both complete access light rigid fuselage hatches LATHES ING MACHINES MACHINE SHOP SUPPLES S / MACHINERY ARC OIS INC PO Ron S3-Y HadEloan WV 25525 t 5523538 REPRESENTATIVES OF MANY MANUFACTURERS NEW CAPALOG SnUGZ Flu oR I. numb 0400 NUNtIOU _______STARLI TEST~ FLIGHT T 13 WIJO SIN NAIQ-tALl4O Q8 TO OWJ 15*4 TO FlY 15c FLIGHTS COMPlETE DETAiLED 8 - MAI8JAL BALSA & HARI7AOOO IT 55Y5 lrssoddA5S last ojIR JAMMAERQ P0 So. OiL AJINk 23303 m cal 804 824 0514 pism md $250 i*pindRCIRF REqEmEN RW*Rd February 1990 153 r WORLDS BIGGEST SC5LE PLANS & DOCUMENTATION SERVICE U nLEIOflEL PLANS80OO*,I 50 PACE CATALOGA VESWS U EQ US LOnAAI, pp,, Souse Ps,no oPnonoSenoce PLANS ENLARGING3039 Madison 50. OnnnnSnn NE 17403 SCALE OEEUMENTATINU919003-5239 Someone once said no new ideas adaptations old ones True observa tion T-28 model mounts RC equipment box hack removable firewall-andengine unit Since engine cooling air passes through firewall exits out cockpit box enclosed protect electronics Though probably necessary considering short flight times involved cool air separately routed box Servo pushrods operate gang five bellcranks connect aerodynamic controls two servos ailerons two elevators rudder bellerank unit perma nently attached fuselage structure open ing servo pushrods quick-links entire engine/firewall/equipment box assembly may removed controls remain attached bellerank gang Access pushrod quicklinks through cockpit takes 10 15 minutes remove assembly access equipment very easy wings can re main attached fuselage some years Ive used certain design scheme landing gears models WW air craft has satisfactory Its both sturdy light has functional rubber shock cords easily repairable photos illustrates use scheme T-28 landing gear Struts 1/6-diameter aluminum tubing having 035 wall thickness have flattened oval cross section clamping between wood blocks Both strut ends have further flattened / gap between walls upper end receives short /16 sheet aluminum spacer fill gap before its drilled 6-32 machine screw mounts fuselage bottom end slips over i/~ sheet aluminum crotch fitting Again no fixed attachment used assembly main tained tension functional cable braces tach crotch Thin-wall stainless steel tubing old auto radio antenna %2 dia used axle two spreader bars 544.dia steel tub ing normally used auto hydraulic brake lines axle retained several #62 rubberbands wrapped around lower crotch tongue Spreader tubes slip over plastic-tubing-covered ends 4-40 machine screws protrude inside crotch Spreader bars again fixed brace-cable tension holding place photo landing gear components shows other bits Going outward crotch parts slider fits over axle pre vent pinching rubber shock cords short length rubber tube auto heater hose CyAd slider brass nylon washers side wheel cotter pin retain wheel changing materials sizes scheme scales up down nicely fact works well quite small Free Flights using thin-wall K&S aluminum tubes monoftlament brace wires Larger sizes steel aluminum tubing obtainable aircraft supply houses tf youre near let suggest Aircraft Spruce Specialty Co. 201 W Trueslow Ave Ful lerton CA 92632 mail order specialize serving home builder full-scale aircraft carry things useful builder large Scale models obtainable typical model shop include closed-cell styrene blue urethane foams impervious dope thinners kinds high-tech fibers both standard low-shrink dopes Incidentally anyone builds models larger Peanut Scale should buying dope thin ner gallon unless totally addicted iron-on stuff companys mam moth catalog expensive its worthwhile since has much how-to information compos ites epoxies dopes plastics metals last article MA about year ago men tioned desirability engine-cooling baffles pressure cowls Scale models stan dard full-scale practice Pressure maintained having air-exit area smaller inlet trick baffling simply make mini mum area around engine cylinder ie air enters cowl must exit between baf fle cylinder photos shows baffling system used T-28s Supertigre 90 case homemade box muffler forms left-hand side baffle other two pieces 016 aluminum sheet attached firewall Exiting air passes through firewall out cock pit idea force high-speed flow about cylinder therefore baffles must close cylinder Perry regulator pump shown same photo baffles highly recommended al lows engine started choking permits fuel tank placed remote lo cation problem though true direct-injection pump Once engine flooded must pinch off fuel line clear engine regulator set low pressure flooding wont happen sim ply crank engine until fires card-carrying masochists additional DFW T-28 information sources Air Interna tional March 1978 description plane Photos may Rare Birds Man ty Pat Groves 791 Nisqually Dr Sunny vale CA 94087 RC Soaring/Blakeslee Continued page 49 pictured Dans article falls away very steeply east Jurg said finest slope Bernese Oberland wind direction tonight westerly zephyr gently blowing up broad ski slope lying west Jurg Martin displayed light-air versatility slow-flight capabilities Speedos flying forma tion close along ridge kept going until almost too dark see planes back dining room nightcap two model talk few fliers brought musical instruments pretty lively folk music dancing going Some pilots over old hotel 154 Model Aviation HANDSOFFCUTII Especially Designed tar Tapered Wings unique device cutting high quality foam wing cores HANDS OFF cutting both sides same time Avaitable hardware package assemble own board-Specify 30 -40 -50 60 ordering Size may changed anytime Max Chord tandard ILarger chords availablel Easy assemble Requires 24 Volt Variable Output Power Supply DEALERS WANTED Hands Off Cut II Iharaware packagel$8750 S & H 24 Volt Variable output power supply$8250 S & H VIDEO FOAM SHOP Foam Shop Part OneCutting Foam Wings hour long cuts made using HANDS OFF CUT II VHSOnly $2995 includes S & H lower 48 Foam Shop Part TwoCutting Foam Fuselages hour long cuts made using simple bow VHSOnly $2995 includes S & H lOwer 48 SUPER BOND CONTACT ADHESIVE best contact cement bane ever used Only $375 8 oz squeeze bottle Enougs 1400 square inch wingAdd $200 S & H lower 48 118 inch Phenolic Board Templates 4536r sq ftOnly $500 S & H NOR-RAY PRODUCTS INC 5008 Sandbeach Road VISAWichita Falls Texas 76310 Tet f817 324476 1/4-SCALE PLANS FROM FACTORY BLUEPRINTS See cate i/U M008181 uctooer 00 Wing Loading 18 ozsi Span 78 inches Weight 825 lbs Area 1053 inches 46-61 2/Cycle Plans rolled manual Spaceman decals $3000 PPD Cowls pants Fiberglass Master Dry Ridge Models 59 MoCurry Road704 658-2663 Weaervilla NC 28787
Edition: Model Aviation - 1990/02
Page Numbers: 44, 45, 149, 153, 154
ONE Sport Scales attractionsfor both specta tors contestantsis fact models teresting obscure aircraft can compete available documentation too sparse ex acting AMA Precision Scale FAT Scale stan dards Designed 1915 DFW T-28 such air craft design represented sole proto type its configuration bizarre Yet ways quite advanced time sported full engine cowl flush wing radiator wingspan little 20 ft Perhaps T-28 short fat Early WW 1 design style called walfisch whale wide brief popularity Ger featured deep fuselage completely filled gap between biplane wings Fok ker experimented type M-16 ever believe Roland manufac turer have production run walfisch two-seated C-Il However DFW T-28 remains ex treme example fad Its probable sim plification assembly alignment procedures major objective designs During war delivery German aircraft fac tory airfields near frontand move ment operational squadrons new field some distance oldwas usually accom plished loading disassembled aircraft rail road flatcars along tent hangars other squadron equipment Incidentally resemblance train loaded cargo old-fashioned circus train led custom calling Jadgescwaders Joes T-28 disassembles ease transport maintenance Lots neat tricks usedand tells column Note similarity cowl jack-o-lantern L external bracing functional Assembly field involves 12 screws takes matter few minutes ST 90H engine surrounded baffles capture direct cooling airflow L Equipment box houses radio gear Fuel tank will sit top Module easy remove servicing Joe has developed scheme making WW I-type landing gear structure R over years 44 Model Aviation Radio Cono Scale Joe Tschirgi 1641 Wltitestone Santa Ana CA 92705 Author Joe Tschirgi claims doesnt build strange modelshe builds models strange air craft large Scale model one-of-a-kind 1915 DFW T-28 probably extreme example German walfiach whale school aircraft design Read fighter groups Plying Circuses event rail transportation combined minor crackups nose-overs ground loops etc meant ground crews spent much time assembling disassembling aircraft walfisch style undoubtedly helped ground crews aircrews stuck air craft having poor visibility its pilot have photo prototype T-28 being taxied pi lot standing its cockpit effort see over nose little-known facts modeldom Free Flight models high drag easier adjust stable flight aerodynamically slick configurations Anyone has studied dy namics will recognize drag damping fac tor pitch maneuvers stall/dive sequences loops etc fact together universal attraction something different led build Free Flight T-28 spring 1978 Success 16-in-to-the-ft model pow ered Cox 049 swinging seven-inch prop lulled belief larger RC machine would cinch flyan Ugly Stick Scale world So proceeded current ver sion pictured month Its exactly twice Free Flight versions size Powered Superti gre 90H engine H standing Helicopter versionsee photo heat-sink-style cyl inder head swinging 16-in prop larger scale yields span 65 maximum fuselage depth 20 dry weight 12 lb Its first flight nearly disaster pitch control less normal directional con trol almost impossible achieve would bank right turn leftand vice versa strug gled around sky hoping practice could learn fly thing about 10 mm gave excellent smallscale version old air show act classic Drunk Pilot Lightplane Ill always re member Dick Granere wearing top hat tails performing front seat Curtiss Junior some 53 years ago Chicago Hed pull up ground level tail slide Anyway eventually abandoned first tempt fly T-28 normally controlled fashion closed throttle waited evitable crash l3ut power directional control improved landed insignificant damage problem has resolved least part adopting full differential aileron movement trailing edge aileron moves up down small departure scale will remain nameless interest future Scale points last T-28 has reasonable nonaerobatic flight characteristics once its air Takeoffs particularly difficult hold full Up ele vator plant tail skid firmly ground un til some airspeed attained generally good policy tail-dragger tends ground loop However landing T-28 accident wait ing happen Someone once foolish enough allow fly Space Shuttle Landing Simulator NASA Houston Its typical simulators used almost everyone days train pilots large aircraft sit cockpit full-scale mockup actual vehicle through windshield see video projection airport computer interprets what effect pilots movement controls would have full-scale craft causes video projec tion airfield change move ap propriate manner airfield gets larger Continued page 149 Fully HALF crashes can traced dead dying receiver batteries New Plane Saver Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 x 1 x 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 6 volts Works 4 5 cell packs capacity used servo normal reversed mode adjustment sets failsafe throttle limit 0% 1000/s failsafe throttle works normally up set point ttle operates normally failsafe mode atible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additionalList price $3995Introductory offer $2995 APPLIED EIIGIrIEERIIIG 214 241-6060 PO Box 5100 Carrollton TX 75006 division ot Research Corporation Prices subject chaste notice r ~~1reproudto announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP, February 1990 45 later youll see need HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 Another First McDaniel RIC New Solid State On-Board Glow-Plug Dilvers Now con dtive 1 2 glow plugs efficiently ond outomatically new McDaniel On-Boord Glow-Plug Drivers engine iso 2 4 stroke glow hos 1 2 cylinders o Model 471 472 On-Board Glow-Plug Dver will ease jobs starting ond maintaining idle during taxiing power down flighf moneuvers FEATURtS INCLUDE Servo Reversing Optically Coupled Circuitry No RFI Automatic Shutdown Via TX RX Connector Plug Battery Pack Remote Glow Plug Indicator Panels Available Separately Battery Pack AC Charger NOT Included Available Separately McDaniel R/C IncVisa MC accepted 1654 Crofton Blvd Suite 4 Crofton MD 21114 e 301721-6303 301721-6306 NEW ELECTRIC Fly . t stand-way-off scale fun ship designed forO5 electric power can per-form take-offs touch goes aerobatics beauty yet enjoy docile slow flight easy landings Quick aid easy build kit includes pre cut fuselage sides tail feathers small parts hardware complete rolled plans step-by-step instructions formed landing gear windshield Electro-combo includes kit DSC 075 Hyperth rust motor fused switch iharness Tamiya connector propeller adaptor 8/4 fiberglass propeller 40 Span 275 Sq area 32 oz flying ht flat bottom airfoil rudder elevator motor add ailerons too rII%r$I795 IIAVEY675 TOWER LANE SPECIAL COMBOYSTEMSWEST CHESTE1 PA 19380 BASIC KIT $29IORPoRATIoN 215430 8045 Typically given homemade test setup will have some way affixing motor/prop combo mechanism ultimately displays thrust propeller pull ounces Some provision al ways made vary measure power input rpm swap motors propellers usual purpose pursuit seems to deter whats best combination motor bat tery prop friends lose cause motors batteries dont develop thrust per se So Im exactly sure mean ing whats best way see given prop given rpm displays given thrust thats spin ning propeller develops thrust whatever thats providing energy spin itbe electric motor steam engine twisted elastic bands motion ocean clockwork dylith ium crystal engines hand crank life form treadmill forgive gas enginedoes matter put different words prop some rpm displays some particular thrust level will display same thrust same rpm no matter what turns Now can certainly understand conve nience using ati electric motor aid evaluation comparison props thrust What have problem impression somehow particular motor/battery makes difference end thrust result What ever prop its rpm/thrust often several motor/battery combos will job turning Now seriously pursue thrust fashion Ive described somehow Ive missed point please let know Ill pass good info along future column everyones benefit might make up some such instrumentation myself Mean thanks have taken time share photos data etc Im sorry blew Im certainly willing try again OK Speed controls have topic covered last few columns now have brief followup coverage As promised last month since asked Futaba Electric re ceiver built-in speed control uses framerate speed control design personally borrowed measured know case Its interesting note receiver has become very popular locality also seems work well Unfortunately its limited sevencell motor battery packs relatively small mo tors feature dont particularly care automatic motor shutdowna built-in fea ture BEC battery eliminator circuit designcan catch surprise rea son prefer separate receiver battery Im hoping Futabas marketing set has significant success well see biggerand-better receiver/speed-control combos come along future sure makes installations sim pler folks Let close noting beginning whole new flying year will scene just about time youre reading Happy Quiet Landings everyone throughout 1990 RC Scale/Tschirgi Continued page 45 approach rotates apply aileron etc remarkably realistic three landing attempts NASA simula tor destroyed orbiter killed myself three times Experiences T-28 have similar Both machines have odd characteris tic After establishing slow glide path run way attempting flare flare term used describe pitch maneuver used slow descent aircraft nears ground landing approachthe pilot pulls back control column raises nose vehicleEd will rotate vehicle ac tion has little effect crafts velocity vector continues unabated ground char acteristic product wings having very low aspect ratio overall design high parasitic drag lots exterior surface area first glance T-28 would seem have reasonable aspect ratio biplane since span-to-chord ratio about 51 interplane gap vertical distance between two wingsEd exceeds chord However deter mining effective aspect ratio multiplane complex question case T-28 ex cessive gap between four wing roots fu selage tends reduce designs aerodynamics two separate biplane cells aspect ration about 21 Thus total config uration has effective aspect ratio little 20 keep T-28s approach speed high manage properly flare troubles far over planes high center-ofgravity narrow-track landing gear poor aerodynamic directional stability combine pro duce inevitable ground loop unless Im flying grass landing directly brisk breeze youve gotten impression Id recommend model card-carrying maso chists youre right T-28 model does corporate few interesting design features have proven number models nay general interest Continued page 1S3 February 1990 149 0 THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great performance Thermal Charger cne Wing Span Wing Area Motor included 60 Inches 545 Sq Inches Leisure 05 Electric %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 RC Scale/Tschirgi Continued page 149 large-scale biplane pays think through assembly/disassembly procedures equipment access options very thoroughly before beginning construction its someone elses designyou may have better idea one-piece wings nonfunctional nonexistent brace wires usual practice nonscale wire-braced bi planes concerned results model either heavier weaker could achieved scalelike approach also prefer make everything removable wings con trol surfaces tail landing gear etc small models facilitates finishing general maintenance repairs eventual refinishing large model can necessity unless own very big van take field Some techniques used making T-28 easy disassemble revealed photo partially disassembled model Wings four separate panels plug fuselage supported functional brace cables Both lift landing cables black-nylon-coated stranded steel outside diameter OD about 035 standard fishing leader available mos[ good fishing tackle stores Note stranded cable scale WW aircraft wire bracing except post-1915 British planes streamlined solid RAF wire came use time Connection loops made passing ca ble twice through short length slightly flat tened %2-OD aluminum tubing tubing squeezed flat smooth-jawed pliers drop CyA glue end tube com pletes job Noncritical bracing such X between interplane struts drag wire top rear strut cowl similar-diame ter nylon monofilament same fishing tackle shop latter dyed black common fabric dye ends finished same end-loop technique steel ones Individual monofilament braces slightly shorter length required natural elasticity provides necessary tension hold everything togetner Functional turnbuckles ends landing flying cables remain fixed length during normal assembly/disassembly procedures During assembly lower wings first plugged fuselage attached land ing cables means #4 screws having lengths initially left external allows lower wings droop slightly other photos show next step Interplane struts 4-in thin-walled K&S aluminum tub ing ends flattened internal /16 gap remains Balsa fairings added tubing shaped achieve proper strut cross sec tion strut ends simply fit onto bayonet fit tings screwed both upper lower wings fittings cut 3A-in aluminum angle having /16 thickness No positive strut attachment used Brace-cable tension holds place upper wing bayonet fittingswhich removed wing during disassembly left attached lift cablesare plugged top interplane struts Lower wing droop allows done loosening turnbuckles Upper wings now plugged fuselage bayonet fittings attached two #4 screws per fitting Fully tightening landing ca ble attach screws tensions lift landing ca bles establishes proper dihedral monofilament braces attached between hooks incorporated bayonet fittings total 12 screws must installed dur ing operation use socket-head screws re duces time required few minutes Functional turnbuckles use ones Du Bro look scale also allow accurate adjustment dihedral all-important wing twist Its difficult overemphasize value washout wing trailing edge near tip warped up Scale models perfect pilots would useful real world its best defense against snap rolling ground slow down too much land ing approach pull ground suffi cient airspeed day before writing lines witnessed beautiful A-scale Jungmeister snap roll its first-flight takeoff check remains re vealed washin wing trailing edge near tip warped down both lower wing panelsa cer tain invitation disaster just recent numerous cases Scale model rollitis Ive seen past 30-odd years Most could have prevented couple de grees washout People will spend hours locat ing models CG very precisely ig nore wing twist later wonder what hap pened tendency toward tail-heaviness trait com mon Scale models Light tail aft fuse lage structure lacking designs obvious cure problem However forwardmounted radio equipment may also necessary avoid brute force lead-in-the-nose solutionparticularly WW types course presents modeler access prob lems biplanes conventional solution one-piece lower wing things really pushed up against firewall access awkward best Fifty years ago old-time Free Flighters used different solution Im certain first devel oped scheme certainly Carl Goldberg popul arized 1938-39 designs engine firewall removable unit electrical equipment spark coil batteries timer mounted rack attached back firewall allowed both complete access light rigid fuselage hatches LATHES ING MACHINES MACHINE SHOP SUPPLES S / MACHINERY ARC OIS INC PO Ron S3-Y HadEloan WV 25525 t 5523538 REPRESENTATIVES OF MANY MANUFACTURERS NEW CAPALOG SnUGZ Flu oR I. numb 0400 NUNtIOU _______STARLI TEST~ FLIGHT T 13 WIJO SIN NAIQ-tALl4O Q8 TO OWJ 15*4 TO FlY 15c FLIGHTS COMPlETE DETAiLED 8 - MAI8JAL BALSA & HARI7AOOO IT 55Y5 lrssoddA5S last ojIR JAMMAERQ P0 So. OiL AJINk 23303 m cal 804 824 0514 pism md $250 i*pindRCIRF REqEmEN RW*Rd February 1990 153 r WORLDS BIGGEST SC5LE PLANS & DOCUMENTATION SERVICE U nLEIOflEL PLANS80OO*,I 50 PACE CATALOGA VESWS U EQ US LOnAAI, pp,, Souse Ps,no oPnonoSenoce PLANS ENLARGING3039 Madison 50. OnnnnSnn NE 17403 SCALE OEEUMENTATINU919003-5239 Someone once said no new ideas adaptations old ones True observa tion T-28 model mounts RC equipment box hack removable firewall-andengine unit Since engine cooling air passes through firewall exits out cockpit box enclosed protect electronics Though probably necessary considering short flight times involved cool air separately routed box Servo pushrods operate gang five bellcranks connect aerodynamic controls two servos ailerons two elevators rudder bellerank unit perma nently attached fuselage structure open ing servo pushrods quick-links entire engine/firewall/equipment box assembly may removed controls remain attached bellerank gang Access pushrod quicklinks through cockpit takes 10 15 minutes remove assembly access equipment very easy wings can re main attached fuselage some years Ive used certain design scheme landing gears models WW air craft has satisfactory Its both sturdy light has functional rubber shock cords easily repairable photos illustrates use scheme T-28 landing gear Struts 1/6-diameter aluminum tubing having 035 wall thickness have flattened oval cross section clamping between wood blocks Both strut ends have further flattened / gap between walls upper end receives short /16 sheet aluminum spacer fill gap before its drilled 6-32 machine screw mounts fuselage bottom end slips over i/~ sheet aluminum crotch fitting Again no fixed attachment used assembly main tained tension functional cable braces tach crotch Thin-wall stainless steel tubing old auto radio antenna %2 dia used axle two spreader bars 544.dia steel tub ing normally used auto hydraulic brake lines axle retained several #62 rubberbands wrapped around lower crotch tongue Spreader tubes slip over plastic-tubing-covered ends 4-40 machine screws protrude inside crotch Spreader bars again fixed brace-cable tension holding place photo landing gear components shows other bits Going outward crotch parts slider fits over axle pre vent pinching rubber shock cords short length rubber tube auto heater hose CyAd slider brass nylon washers side wheel cotter pin retain wheel changing materials sizes scheme scales up down nicely fact works well quite small Free Flights using thin-wall K&S aluminum tubes monoftlament brace wires Larger sizes steel aluminum tubing obtainable aircraft supply houses tf youre near let suggest Aircraft Spruce Specialty Co. 201 W Trueslow Ave Ful lerton CA 92632 mail order specialize serving home builder full-scale aircraft carry things useful builder large Scale models obtainable typical model shop include closed-cell styrene blue urethane foams impervious dope thinners kinds high-tech fibers both standard low-shrink dopes Incidentally anyone builds models larger Peanut Scale should buying dope thin ner gallon unless totally addicted iron-on stuff companys mam moth catalog expensive its worthwhile since has much how-to information compos ites epoxies dopes plastics metals last article MA about year ago men tioned desirability engine-cooling baffles pressure cowls Scale models stan dard full-scale practice Pressure maintained having air-exit area smaller inlet trick baffling simply make mini mum area around engine cylinder ie air enters cowl must exit between baf fle cylinder photos shows baffling system used T-28s Supertigre 90 case homemade box muffler forms left-hand side baffle other two pieces 016 aluminum sheet attached firewall Exiting air passes through firewall out cock pit idea force high-speed flow about cylinder therefore baffles must close cylinder Perry regulator pump shown same photo baffles highly recommended al lows engine started choking permits fuel tank placed remote lo cation problem though true direct-injection pump Once engine flooded must pinch off fuel line clear engine regulator set low pressure flooding wont happen sim ply crank engine until fires card-carrying masochists additional DFW T-28 information sources Air Interna tional March 1978 description plane Photos may Rare Birds Man ty Pat Groves 791 Nisqually Dr Sunny vale CA 94087 RC Soaring/Blakeslee Continued page 49 pictured Dans article falls away very steeply east Jurg said finest slope Bernese Oberland wind direction tonight westerly zephyr gently blowing up broad ski slope lying west Jurg Martin displayed light-air versatility slow-flight capabilities Speedos flying forma tion close along ridge kept going until almost too dark see planes back dining room nightcap two model talk few fliers brought musical instruments pretty lively folk music dancing going Some pilots over old hotel 154 Model Aviation HANDSOFFCUTII Especially Designed tar Tapered Wings unique device cutting high quality foam wing cores HANDS OFF cutting both sides same time Avaitable hardware package assemble own board-Specify 30 -40 -50 60 ordering Size may changed anytime Max Chord tandard ILarger chords availablel Easy assemble Requires 24 Volt Variable Output Power Supply DEALERS WANTED Hands Off Cut II Iharaware packagel$8750 S & H 24 Volt Variable output power supply$8250 S & H VIDEO FOAM SHOP Foam Shop Part OneCutting Foam Wings hour long cuts made using HANDS OFF CUT II VHSOnly $2995 includes S & H lower 48 Foam Shop Part TwoCutting Foam Fuselages hour long cuts made using simple bow VHSOnly $2995 includes S & H lOwer 48 SUPER BOND CONTACT ADHESIVE best contact cement bane ever used Only $375 8 oz squeeze bottle Enougs 1400 square inch wingAdd $200 S & H lower 48 118 inch Phenolic Board Templates 4536r sq ftOnly $500 S & H NOR-RAY PRODUCTS INC 5008 Sandbeach Road VISAWichita Falls Texas 76310 Tet f817 324476 1/4-SCALE PLANS FROM FACTORY BLUEPRINTS See cate i/U M008181 uctooer 00 Wing Loading 18 ozsi Span 78 inches Weight 825 lbs Area 1053 inches 46-61 2/Cycle Plans rolled manual Spaceman decals $3000 PPD Cowls pants Fiberglass Master Dry Ridge Models 59 MoCurry Road704 658-2663 Weaervilla NC 28787
Edition: Model Aviation - 1990/02
Page Numbers: 44, 45, 149, 153, 154
ONE Sport Scales attractionsfor both specta tors contestantsis fact models teresting obscure aircraft can compete available documentation too sparse ex acting AMA Precision Scale FAT Scale stan dards Designed 1915 DFW T-28 such air craft design represented sole proto type its configuration bizarre Yet ways quite advanced time sported full engine cowl flush wing radiator wingspan little 20 ft Perhaps T-28 short fat Early WW 1 design style called walfisch whale wide brief popularity Ger featured deep fuselage completely filled gap between biplane wings Fok ker experimented type M-16 ever believe Roland manufac turer have production run walfisch two-seated C-Il However DFW T-28 remains ex treme example fad Its probable sim plification assembly alignment procedures major objective designs During war delivery German aircraft fac tory airfields near frontand move ment operational squadrons new field some distance oldwas usually accom plished loading disassembled aircraft rail road flatcars along tent hangars other squadron equipment Incidentally resemblance train loaded cargo old-fashioned circus train led custom calling Jadgescwaders Joes T-28 disassembles ease transport maintenance Lots neat tricks usedand tells column Note similarity cowl jack-o-lantern L external bracing functional Assembly field involves 12 screws takes matter few minutes ST 90H engine surrounded baffles capture direct cooling airflow L Equipment box houses radio gear Fuel tank will sit top Module easy remove servicing Joe has developed scheme making WW I-type landing gear structure R over years 44 Model Aviation Radio Cono Scale Joe Tschirgi 1641 Wltitestone Santa Ana CA 92705 Author Joe Tschirgi claims doesnt build strange modelshe builds models strange air craft large Scale model one-of-a-kind 1915 DFW T-28 probably extreme example German walfiach whale school aircraft design Read fighter groups Plying Circuses event rail transportation combined minor crackups nose-overs ground loops etc meant ground crews spent much time assembling disassembling aircraft walfisch style undoubtedly helped ground crews aircrews stuck air craft having poor visibility its pilot have photo prototype T-28 being taxied pi lot standing its cockpit effort see over nose little-known facts modeldom Free Flight models high drag easier adjust stable flight aerodynamically slick configurations Anyone has studied dy namics will recognize drag damping fac tor pitch maneuvers stall/dive sequences loops etc fact together universal attraction something different led build Free Flight T-28 spring 1978 Success 16-in-to-the-ft model pow ered Cox 049 swinging seven-inch prop lulled belief larger RC machine would cinch flyan Ugly Stick Scale world So proceeded current ver sion pictured month Its exactly twice Free Flight versions size Powered Superti gre 90H engine H standing Helicopter versionsee photo heat-sink-style cyl inder head swinging 16-in prop larger scale yields span 65 maximum fuselage depth 20 dry weight 12 lb Its first flight nearly disaster pitch control less normal directional con trol almost impossible achieve would bank right turn leftand vice versa strug gled around sky hoping practice could learn fly thing about 10 mm gave excellent smallscale version old air show act classic Drunk Pilot Lightplane Ill always re member Dick Granere wearing top hat tails performing front seat Curtiss Junior some 53 years ago Chicago Hed pull up ground level tail slide Anyway eventually abandoned first tempt fly T-28 normally controlled fashion closed throttle waited evitable crash l3ut power directional control improved landed insignificant damage problem has resolved least part adopting full differential aileron movement trailing edge aileron moves up down small departure scale will remain nameless interest future Scale points last T-28 has reasonable nonaerobatic flight characteristics once its air Takeoffs particularly difficult hold full Up ele vator plant tail skid firmly ground un til some airspeed attained generally good policy tail-dragger tends ground loop However landing T-28 accident wait ing happen Someone once foolish enough allow fly Space Shuttle Landing Simulator NASA Houston Its typical simulators used almost everyone days train pilots large aircraft sit cockpit full-scale mockup actual vehicle through windshield see video projection airport computer interprets what effect pilots movement controls would have full-scale craft causes video projec tion airfield change move ap propriate manner airfield gets larger Continued page 149 Fully HALF crashes can traced dead dying receiver batteries New Plane Saver Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 x 1 x 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 6 volts Works 4 5 cell packs capacity used servo normal reversed mode adjustment sets failsafe throttle limit 0% 1000/s failsafe throttle works normally up set point ttle operates normally failsafe mode atible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additionalList price $3995Introductory offer $2995 APPLIED EIIGIrIEERIIIG 214 241-6060 PO Box 5100 Carrollton TX 75006 division ot Research Corporation Prices subject chaste notice r ~~1reproudto announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP, February 1990 45 later youll see need HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 Another First McDaniel RIC New Solid State On-Board Glow-Plug Dilvers Now con dtive 1 2 glow plugs efficiently ond outomatically new McDaniel On-Boord Glow-Plug Drivers engine iso 2 4 stroke glow hos 1 2 cylinders o Model 471 472 On-Board Glow-Plug Dver will ease jobs starting ond maintaining idle during taxiing power down flighf moneuvers FEATURtS INCLUDE Servo Reversing Optically Coupled Circuitry No RFI Automatic Shutdown Via TX RX Connector Plug Battery Pack Remote Glow Plug Indicator Panels Available Separately Battery Pack AC Charger NOT Included Available Separately McDaniel R/C IncVisa MC accepted 1654 Crofton Blvd Suite 4 Crofton MD 21114 e 301721-6303 301721-6306 NEW ELECTRIC Fly . t stand-way-off scale fun ship designed forO5 electric power can per-form take-offs touch goes aerobatics beauty yet enjoy docile slow flight easy landings Quick aid easy build kit includes pre cut fuselage sides tail feathers small parts hardware complete rolled plans step-by-step instructions formed landing gear windshield Electro-combo includes kit DSC 075 Hyperth rust motor fused switch iharness Tamiya connector propeller adaptor 8/4 fiberglass propeller 40 Span 275 Sq area 32 oz flying ht flat bottom airfoil rudder elevator motor add ailerons too rII%r$I795 IIAVEY675 TOWER LANE SPECIAL COMBOYSTEMSWEST CHESTE1 PA 19380 BASIC KIT $29IORPoRATIoN 215430 8045 Typically given homemade test setup will have some way affixing motor/prop combo mechanism ultimately displays thrust propeller pull ounces Some provision al ways made vary measure power input rpm swap motors propellers usual purpose pursuit seems to deter whats best combination motor bat tery prop friends lose cause motors batteries dont develop thrust per se So Im exactly sure mean ing whats best way see given prop given rpm displays given thrust thats spin ning propeller develops thrust whatever thats providing energy spin itbe electric motor steam engine twisted elastic bands motion ocean clockwork dylith ium crystal engines hand crank life form treadmill forgive gas enginedoes matter put different words prop some rpm displays some particular thrust level will display same thrust same rpm no matter what turns Now can certainly understand conve nience using ati electric motor aid evaluation comparison props thrust What have problem impression somehow particular motor/battery makes difference end thrust result What ever prop its rpm/thrust often several motor/battery combos will job turning Now seriously pursue thrust fashion Ive described somehow Ive missed point please let know Ill pass good info along future column everyones benefit might make up some such instrumentation myself Mean thanks have taken time share photos data etc Im sorry blew Im certainly willing try again OK Speed controls have topic covered last few columns now have brief followup coverage As promised last month since asked Futaba Electric re ceiver built-in speed control uses framerate speed control design personally borrowed measured know case Its interesting note receiver has become very popular locality also seems work well Unfortunately its limited sevencell motor battery packs relatively small mo tors feature dont particularly care automatic motor shutdowna built-in fea ture BEC battery eliminator circuit designcan catch surprise rea son prefer separate receiver battery Im hoping Futabas marketing set has significant success well see biggerand-better receiver/speed-control combos come along future sure makes installations sim pler folks Let close noting beginning whole new flying year will scene just about time youre reading Happy Quiet Landings everyone throughout 1990 RC Scale/Tschirgi Continued page 45 approach rotates apply aileron etc remarkably realistic three landing attempts NASA simula tor destroyed orbiter killed myself three times Experiences T-28 have similar Both machines have odd characteris tic After establishing slow glide path run way attempting flare flare term used describe pitch maneuver used slow descent aircraft nears ground landing approachthe pilot pulls back control column raises nose vehicleEd will rotate vehicle ac tion has little effect crafts velocity vector continues unabated ground char acteristic product wings having very low aspect ratio overall design high parasitic drag lots exterior surface area first glance T-28 would seem have reasonable aspect ratio biplane since span-to-chord ratio about 51 interplane gap vertical distance between two wingsEd exceeds chord However deter mining effective aspect ratio multiplane complex question case T-28 ex cessive gap between four wing roots fu selage tends reduce designs aerodynamics two separate biplane cells aspect ration about 21 Thus total config uration has effective aspect ratio little 20 keep T-28s approach speed high manage properly flare troubles far over planes high center-ofgravity narrow-track landing gear poor aerodynamic directional stability combine pro duce inevitable ground loop unless Im flying grass landing directly brisk breeze youve gotten impression Id recommend model card-carrying maso chists youre right T-28 model does corporate few interesting design features have proven number models nay general interest Continued page 1S3 February 1990 149 0 THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great performance Thermal Charger cne Wing Span Wing Area Motor included 60 Inches 545 Sq Inches Leisure 05 Electric %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 RC Scale/Tschirgi Continued page 149 large-scale biplane pays think through assembly/disassembly procedures equipment access options very thoroughly before beginning construction its someone elses designyou may have better idea one-piece wings nonfunctional nonexistent brace wires usual practice nonscale wire-braced bi planes concerned results model either heavier weaker could achieved scalelike approach also prefer make everything removable wings con trol surfaces tail landing gear etc small models facilitates finishing general maintenance repairs eventual refinishing large model can necessity unless own very big van take field Some techniques used making T-28 easy disassemble revealed photo partially disassembled model Wings four separate panels plug fuselage supported functional brace cables Both lift landing cables black-nylon-coated stranded steel outside diameter OD about 035 standard fishing leader available mos[ good fishing tackle stores Note stranded cable scale WW aircraft wire bracing except post-1915 British planes streamlined solid RAF wire came use time Connection loops made passing ca ble twice through short length slightly flat tened %2-OD aluminum tubing tubing squeezed flat smooth-jawed pliers drop CyA glue end tube com pletes job Noncritical bracing such X between interplane struts drag wire top rear strut cowl similar-diame ter nylon monofilament same fishing tackle shop latter dyed black common fabric dye ends finished same end-loop technique steel ones Individual monofilament braces slightly shorter length required natural elasticity provides necessary tension hold everything togetner Functional turnbuckles ends landing flying cables remain fixed length during normal assembly/disassembly procedures During assembly lower wings first plugged fuselage attached land ing cables means #4 screws having lengths initially left external allows lower wings droop slightly other photos show next step Interplane struts 4-in thin-walled K&S aluminum tub ing ends flattened internal /16 gap remains Balsa fairings added tubing shaped achieve proper strut cross sec tion strut ends simply fit onto bayonet fit tings screwed both upper lower wings fittings cut 3A-in aluminum angle having /16 thickness No positive strut attachment used Brace-cable tension holds place upper wing bayonet fittingswhich removed wing during disassembly left attached lift cablesare plugged top interplane struts Lower wing droop allows done loosening turnbuckles Upper wings now plugged fuselage bayonet fittings attached two #4 screws per fitting Fully tightening landing ca ble attach screws tensions lift landing ca bles establishes proper dihedral monofilament braces attached between hooks incorporated bayonet fittings total 12 screws must installed dur ing operation use socket-head screws re duces time required few minutes Functional turnbuckles use ones Du Bro look scale also allow accurate adjustment dihedral all-important wing twist Its difficult overemphasize value washout wing trailing edge near tip warped up Scale models perfect pilots would useful real world its best defense against snap rolling ground slow down too much land ing approach pull ground suffi cient airspeed day before writing lines witnessed beautiful A-scale Jungmeister snap roll its first-flight takeoff check remains re vealed washin wing trailing edge near tip warped down both lower wing panelsa cer tain invitation disaster just recent numerous cases Scale model rollitis Ive seen past 30-odd years Most could have prevented couple de grees washout People will spend hours locat ing models CG very precisely ig nore wing twist later wonder what hap pened tendency toward tail-heaviness trait com mon Scale models Light tail aft fuse lage structure lacking designs obvious cure problem However forwardmounted radio equipment may also necessary avoid brute force lead-in-the-nose solutionparticularly WW types course presents modeler access prob lems biplanes conventional solution one-piece lower wing things really pushed up against firewall access awkward best Fifty years ago old-time Free Flighters used different solution Im certain first devel oped scheme certainly Carl Goldberg popul arized 1938-39 designs engine firewall removable unit electrical equipment spark coil batteries timer mounted rack attached back firewall allowed both complete access light rigid fuselage hatches LATHES ING MACHINES MACHINE SHOP SUPPLES S / MACHINERY ARC OIS INC PO Ron S3-Y HadEloan WV 25525 t 5523538 REPRESENTATIVES OF MANY MANUFACTURERS NEW CAPALOG SnUGZ Flu oR I. numb 0400 NUNtIOU _______STARLI TEST~ FLIGHT T 13 WIJO SIN NAIQ-tALl4O Q8 TO OWJ 15*4 TO FlY 15c FLIGHTS COMPlETE DETAiLED 8 - MAI8JAL BALSA & HARI7AOOO IT 55Y5 lrssoddA5S last ojIR JAMMAERQ P0 So. OiL AJINk 23303 m cal 804 824 0514 pism md $250 i*pindRCIRF REqEmEN RW*Rd February 1990 153 r WORLDS BIGGEST SC5LE PLANS & DOCUMENTATION SERVICE U nLEIOflEL PLANS80OO*,I 50 PACE CATALOGA VESWS U EQ US LOnAAI, pp,, Souse Ps,no oPnonoSenoce PLANS ENLARGING3039 Madison 50. OnnnnSnn NE 17403 SCALE OEEUMENTATINU919003-5239 Someone once said no new ideas adaptations old ones True observa tion T-28 model mounts RC equipment box hack removable firewall-andengine unit Since engine cooling air passes through firewall exits out cockpit box enclosed protect electronics Though probably necessary considering short flight times involved cool air separately routed box Servo pushrods operate gang five bellcranks connect aerodynamic controls two servos ailerons two elevators rudder bellerank unit perma nently attached fuselage structure open ing servo pushrods quick-links entire engine/firewall/equipment box assembly may removed controls remain attached bellerank gang Access pushrod quicklinks through cockpit takes 10 15 minutes remove assembly access equipment very easy wings can re main attached fuselage some years Ive used certain design scheme landing gears models WW air craft has satisfactory Its both sturdy light has functional rubber shock cords easily repairable photos illustrates use scheme T-28 landing gear Struts 1/6-diameter aluminum tubing having 035 wall thickness have flattened oval cross section clamping between wood blocks Both strut ends have further flattened / gap between walls upper end receives short /16 sheet aluminum spacer fill gap before its drilled 6-32 machine screw mounts fuselage bottom end slips over i/~ sheet aluminum crotch fitting Again no fixed attachment used assembly main tained tension functional cable braces tach crotch Thin-wall stainless steel tubing old auto radio antenna %2 dia used axle two spreader bars 544.dia steel tub ing normally used auto hydraulic brake lines axle retained several #62 rubberbands wrapped around lower crotch tongue Spreader tubes slip over plastic-tubing-covered ends 4-40 machine screws protrude inside crotch Spreader bars again fixed brace-cable tension holding place photo landing gear components shows other bits Going outward crotch parts slider fits over axle pre vent pinching rubber shock cords short length rubber tube auto heater hose CyAd slider brass nylon washers side wheel cotter pin retain wheel changing materials sizes scheme scales up down nicely fact works well quite small Free Flights using thin-wall K&S aluminum tubes monoftlament brace wires Larger sizes steel aluminum tubing obtainable aircraft supply houses tf youre near let suggest Aircraft Spruce Specialty Co. 201 W Trueslow Ave Ful lerton CA 92632 mail order specialize serving home builder full-scale aircraft carry things useful builder large Scale models obtainable typical model shop include closed-cell styrene blue urethane foams impervious dope thinners kinds high-tech fibers both standard low-shrink dopes Incidentally anyone builds models larger Peanut Scale should buying dope thin ner gallon unless totally addicted iron-on stuff companys mam moth catalog expensive its worthwhile since has much how-to information compos ites epoxies dopes plastics metals last article MA about year ago men tioned desirability engine-cooling baffles pressure cowls Scale models stan dard full-scale practice Pressure maintained having air-exit area smaller inlet trick baffling simply make mini mum area around engine cylinder ie air enters cowl must exit between baf fle cylinder photos shows baffling system used T-28s Supertigre 90 case homemade box muffler forms left-hand side baffle other two pieces 016 aluminum sheet attached firewall Exiting air passes through firewall out cock pit idea force high-speed flow about cylinder therefore baffles must close cylinder Perry regulator pump shown same photo baffles highly recommended al lows engine started choking permits fuel tank placed remote lo cation problem though true direct-injection pump Once engine flooded must pinch off fuel line clear engine regulator set low pressure flooding wont happen sim ply crank engine until fires card-carrying masochists additional DFW T-28 information sources Air Interna tional March 1978 description plane Photos may Rare Birds Man ty Pat Groves 791 Nisqually Dr Sunny vale CA 94087 RC Soaring/Blakeslee Continued page 49 pictured Dans article falls away very steeply east Jurg said finest slope Bernese Oberland wind direction tonight westerly zephyr gently blowing up broad ski slope lying west Jurg Martin displayed light-air versatility slow-flight capabilities Speedos flying forma tion close along ridge kept going until almost too dark see planes back dining room nightcap two model talk few fliers brought musical instruments pretty lively folk music dancing going Some pilots over old hotel 154 Model Aviation HANDSOFFCUTII Especially Designed tar Tapered Wings unique device cutting high quality foam wing cores HANDS OFF cutting both sides same time Avaitable hardware package assemble own board-Specify 30 -40 -50 60 ordering Size may changed anytime Max Chord tandard ILarger chords availablel Easy assemble Requires 24 Volt Variable Output Power Supply DEALERS WANTED Hands Off Cut II Iharaware packagel$8750 S & H 24 Volt Variable output power supply$8250 S & H VIDEO FOAM SHOP Foam Shop Part OneCutting Foam Wings hour long cuts made using HANDS OFF CUT II VHSOnly $2995 includes S & H lower 48 Foam Shop Part TwoCutting Foam Fuselages hour long cuts made using simple bow VHSOnly $2995 includes S & H lOwer 48 SUPER BOND CONTACT ADHESIVE best contact cement bane ever used Only $375 8 oz squeeze bottle Enougs 1400 square inch wingAdd $200 S & H lower 48 118 inch Phenolic Board Templates 4536r sq ftOnly $500 S & H NOR-RAY PRODUCTS INC 5008 Sandbeach Road VISAWichita Falls Texas 76310 Tet f817 324476 1/4-SCALE PLANS FROM FACTORY BLUEPRINTS See cate i/U M008181 uctooer 00 Wing Loading 18 ozsi Span 78 inches Weight 825 lbs Area 1053 inches 46-61 2/Cycle Plans rolled manual Spaceman decals $3000 PPD Cowls pants Fiberglass Master Dry Ridge Models 59 MoCurry Road704 658-2663 Weaervilla NC 28787