A sleek little Sport Stunt model takes CL Aerobatics new heights performance Its great way try out latest best engines Design Bill Winter Text John Hunton DESIGNED take advantage new est best engines Control Line Sport Stunter flies well its good looks suggest less maximal still adequate performance Akro Bat Jr can also flown Kustom Krafts manship Cox engine Bill Winter have updated two Bills classic RC designs during past few years RC Special published Model Aviation March April 1990 Cloud Niner revision Krackerjac will appear RC Modeler Cloud Niner extended flight enve lope low velocity end using flap erons split flaps decided carry idea further next project stretching performance envelope high-velocity end keeping lowend gains other words new model should have exceptionally wide perform ance capability Collaborating Bill has reward ing Hes thoughtful man superb de sign talent everything turns out has magic touch latest project no time Bill produced sketches short-coupled shoulder-wing model distinctive lines proportions trademark test design volun teered execute /2A RC version drawing board found myself visualiz ing Control Line Sport Stunt model stead Bills response sug gested scaling down empennage lengthening nose Otherwise lines re mained same dubbed model Akro Bat Jr models took first place last years Northern Virginia Control Line /2A Stunt contest aesthetically its sort blah couldnt imagine people wanting build Akro Bat could would look good 3D did paper would fly Two weeks later answer little model makes high-performance hA CL flight reality Equipped maneu vering flaps tight squares Akro Bat does allinside loops outside loops 60 Model Aviation Above Ciean good looks spectacuiar aerobatics capabiiity halimarks Blii Winters designs CL Sport Stunter great practicing AMA pattern Modei covered Japanese tissue biack trim vinyi stick-on iettering 9elow Overhead view showing rhythm ribs pieasing ilnes needie-pointed nose singie screw hoids wing stress taken dowel runs front wing plywood key former canopy attached two parts joint overiapped Sporting winter beard Austraiian hat author gives scaie diminutive CL Sport Stunter Biii originaiiy designed airpiane 40 RC iooked good author suggested 1/aA CL rendition first hat After years fiylng modeis sun sun iooks back squared loops verticalsand looks good doing Bill really pushed back per formance margins Fly Kustom Kraftsmanship Cox engine has plenty reliable power set up noted later go full performance potent new Shuriken Chinese-made CS engines zoom through sky fast its scary Tests run 35-ft 012 braided lines longer ones will needed fly full Stunt Shuriken addition providing goad engine ac cessibility Fourmost engine mount adds streamlining simplifies construc tion removable wing borrowed RC technology gives easy accessibility controls fuel system model combines full pattern capabil ity compactness economy adjustable line tension features smooth positive controls make excel lent choice beginners Construction Akro Bat Jr unusually easy build two reasons First accu rate fuselage alignment automatic once youve installed plywood key former landing gear mounting plate Sec ond because top spar flat like bottom continuous wing built flat workbench rather air Fuselage Cut sides medium balsa taking care cut key former slots accurately sure make both right side left Cut doublers medi um-soft wood formers relatively firm stock Cut out plywood parts Install doublers longerons fuselage side Slip glue key former position install landing gear mounting plate fuselage now accu rate alignment Hint Strengthen criti cal joints sprinlding baking soda soaking CyA cyanoacry late glue complete structural assembly glue sides together rear install front balsa former Install remaining formers interior parts Block sand fuselage flat top bottom add front rear top bottom sheet ing Carve block sand nose quarter panels conform front former stall quarter panel sheets Flatten nose accurately sanding block insert blind nuts install front plywood fire wall Finish sand fuselage Before install ing empennage drop tail skid rear panel sprinide baking soda apply CyA wing built topside down Lay plan flat board full length wingspan cover waxed paper Use firm balsa spars top bottom spars continuous tip tip Pin top spar flat building board letting extend second panel April 1991 61 ne mapr miruciura componenia gi iuu.ug una ian tuna sides preassembled longerons Buiiding strong lightweight tail easier man looks installing key former landing gear mounting plate brings fuselage accurate alignment Pulling tall halves together removes twist Assembly simple can done off board author strengthens important joints sprinkling baking soda make small fillet soaking thin CyA cyanoacryiste glue Cidee-up wing before covering Both top bottom spars continuous tip tIp Since upper spar also fiat wing built fiat board air will built first panel com plete remove plan spray WD-40 make transparent Reverse plan build second panel over Add top spar doubler Cut out po sition ribs Slip support member onto plan support align ribs shown glue spar Because lines controls exter nal wing assembly easier Stunt models wing can com pletely assembled finish sanded before cutting flaps loose Cut trailing edge parts length Notch glue trailing edge ribs Install partial bottom spar bottom spar Glue flap spars flap leading edges add remaining flap rib parts Trim leading edge proper depth install Add half ribs tip parts Sheet wing assembly Install out board wing tip weight box Trim lead ing edge knife shape carefully symmetrically Smooth wing long flat sanding block Cut flaps loose provide least A2 minimum clearance end Empennage tail designed strength light weight assembly less difficult looks Cut cores soft balsa edge firm balsa Block sand tail flat Round leading edges taper trailing edges desired Final assembly Install engine mount landing gear fuselage Fit wing fuselage taking care form neat tight joint Its good idea mark wing leading edge plywood hole firewall accurate drilling After cov ering tail surfaces ftiselage re moving covering jointing occurs mount tail wing place check its properly aligned wing Controls Cut down Perfect 3-in bellcrank access inner holes approx imately 23-in lead-out spacing Youll also using inner pushrod hole ap proximately 06 center Drill ball connector fit inside pushrod ap proximately 045 center Install connector Use 2-56 RC pushrod devises install adjustable pushrod end links elevator horn Use 020 minimum lead-outs pushrod exits forward stabilizer hooks has adjustable RC link horn mounted top elevator bellcrank Wrap ends tightly prevent snagging fuselage side allow outer eyes pass through adjustable lead-out guide Mount elevator horn top elevator flap linkages RC aileron links rigged exit bottom wing Cut link short install both wing solder glue oper ate unison Add clevis Use RC pushrod connect flap linkage ball link belicrank Finishing Youll probably want cover model heat-shrink materials case follow instructions included materials prototype covered Japanese tissue several reasons Its light easy use gives colorful taut attractive re sult Prime surfaces nitrate butyrate used Sig spray butyrate smooth fine-grade sandpaper Repeat process everything sealed sanded smooth cut tissue parts allowing overlapping Apply unthinned dope around perime ter parts covered Spray tis sue fine mist water adhere quickly before its soggy youve mistak enly selected wrapping paper rather 62 Model Aviation RC aileron linkage hooked up used actuate flaps internal reinforce ment shown removing material help bail link clear wing no problem removable wing allows good access controls fuel tank Flaps actuated via bail link cut-down 3in Perfect belicrank permitting easy removal installation wing Chinese CS engine recently introduced high-powered hA engines really bring model life CS operates best higher rpmhence biaded propeller Half 5 x 3 prop works well tuned pipe can used minipipe about 3 works well less sensitive tuned pipe conservative power setup Kustom Kraftsmanship Cox engine installed Fourmost mount turning 5 x 3 Cox propeller pressure backplate engine gives reliable performance fabulous Shuriken custom metal engine mount interchangeable Fourmost mount engine offers another magnitude power flying holds setting beginning end thinned-blade 5 x 3 prop ideal Full-Size Plans AvaIlable . See Page 180 ALLRJBS I/IR6ALSA FRJ7~MF KRO BATI/S CL SPORT-STUNT DESIGN ST WILLIAM J WINTER ENGINEERED AND DRAWN BY JOHN HUNTONNOV 90 CUT FROM 3/4 T K STOCK 4 ISHARDl/4S4 SM 3/4 STOCK LEBOX OThER TIP 3/16 DOWELNOTE ALL WOOD I/K GLUE TO FUSESPLIT CANOPY OVERLAP J7P 049 ENS i1Qj Japanese tissue youll know point paper will fall apart Lay tissue place pulling out noticeable wrinides Seal edges dope Cover both sides part youre working dry thoroughly spray clear dope added strength Spray brush parts clear butyrate use thinned dope brushing dope has dried completely sand everything fine paper sand through tissue touch up felt-tipped pen similar color Apply additional coats dope strength en seal surface Add AMA num ber decoration sure use strong hinges pin secure grip Canopy Trim canopy fit model Cut two attach front half front fuselage rear half wing Trim off enough rear canopy slip front part wing place glue canopy first front rear Rigging Developing good margin sta bility line tension depends several important factors B Rudder offset provides outward angle crab Ample rudder offset shown plan Line guide An adjustable line guide shown farther back lead-outs greater outward crab angle crab angle tauter lines Start plenty crab angle reduce maximum efficiency may need crab windy days Balance point Make sure model bal ances either center-of-gravity shown farther forward add ballast necessary Dont attempt fly tail-heavy airplane better control response move bal ance point rearward increments B Wing tip weight weight box pro vided Again start weight necessary say 1 oz reduce match conditions Seal box plastic tape Elevator deflection Maximum should 20 degrees Engines standard Cox TD 049 provides adequate power youll need pres sure fuel system complete reliability Dont use timed pressure port stock Cox cut off pressure teat get stock Cox requires minimum pressure backplate Kustom Kraftsman ship KK best combination complete remanufactured KK Cox pressure backplate 72-turn needle valve undrilled venturi Cox plug reliable choice Modified ones available Kustom Kraftsmanship added power April 1991 63 Continued page JSS Left Side view Akro Bat showing adlustabie lead-out guide prototype wee flown using third fifth holes front 1 14 oz wing tip weight outboard weight box line tension excellentalthough outer tip dipped little during square maneuvers Start 1 14 02 remove weight match conditions Right lead-out guide lets vary holes use first flights windy-day sessions run lead-outs toward rear wing calm days run farther forward Movies/Filippova Continued page 59 RC Junkers about 10 feet wing span weighed about 14 pounds equipped Russian 10cc Raduga ser ial engines engines modified course As know Soviet-made serial en gines usually arent highest quality Milcaelian exacting producer has vivid impressions memories war wanted movie capture told Konstantin Sergei fly Junkers theyd appear exactly remembered producers idea show two Junkers flying other divebombing trench Russian soldier stood guard models expected fly side side very close other youve flown RC models know hard Also since cameras couldnt move up pilots maintain specified trajectory Any little mistake flying directly trench would ruin take film showed So viet soldier guarding trench Explosives buried close trench detonated bombs hit ground Another problem sequence bombing precisely Mikaelian wished wanted planes dive down eject bombs regular intervals af ter other took lot experimenting changes models special control mechanism get right everything producer wanted Konstantin Sergei made 20 flights together before cameras rolled flew bombing scene over over producing hours worth film scene lasted minute finished movie shooting finishedor thought morning Mikaelian announced hed come up another ideahe wanted show bombing appeared soldier the trench So crew moved south again search summer time city Tashkent As Konstantin told later shooting Tashkent absolutely terrible experience him Sergei create effect Mi kaelian wanted two modelers stand side side cameraman throw bombs down themselves operator watch bombs hurtling down pre cisely six bombs about 10 inches long made metal reached speed 120 mph modelers cooperated bravely course nobody wanted killed stayed cam era threw bombs down precisely possible directly camera bombs landed extremely close probably about eight inches stood Fortunately nobody killed Mi kaelian satisfied scene filming over last collaboration movie project A Push-Rod Selection Leaves Up InTheAir Its true offer complete line push-rods world thats important reason choose Sullivan push-rods fact once its model doesnt matter other push-rods carry just want yours work best its will Sullivan push-rods designed built maximum strength flexibility dependability Theyre also light weiit well simply best Which means get widest choice Sullivan PRODUCTS push-rods get best choice P0 Box 5166 Baltimore MD 21224 Getting Better Ideas Off Ground brings something new interesting Konstantin Sergei Vitaliy last signment movie called Afghani stan Brake about recent war Afghan istan film jointly produced Lenfilm Italian company Vladimir Bartko producer modelers job build two So viet MI-8 Helicopters planes tended flying models blown up movie Yet construction duplicate full-scale MI-8 exactly both side out because producer wanted explosion look realistic possi ble fuselage length about 83 ft Helicopters fairly large As turned out oaly models needed blew up realistically other Helicopter left intact ready used future movie about SovietAfghanistan conflict could years away course Afghanistan war has become just bad dream What would movie industry out models modelers Konstantin Ser gei Vitaliy hope continue team work years come IZ Akro Bat/Hunton Continued page 63 Its critical use Cox fuel Cox en gines incompatible fuels used en gine will perform normally after start-up April 1991 155 p I I I I I I I I I I I I I I * U U U U I U U U U I U I U U U U U U U U U U U 510 GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTQUART GALLON 0% Nitroniitharte $995 5% Nitromethane $495$1195 100/0 Nitromettart $95$535$1395 150/0 NllrQmethan $R25$1595 25% NitrolohaJ* $495$795$2095 350/0 NitromeThane $595 $895 $2595 SIG PREMIUM 4-STROKE FUEL 100/0 Nitromethane$1325 150/o Nitromethane$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure ye paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPOsaS subject tu uheeg notice See dealer first available order direct Call 1J 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 U U E UEUUUUUUU AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300 BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In Computer Designed 3 Axis Control Part 1 03 Ultralight0Easy Construction Wood Construction TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 start behaving setting wrong Use Cox racing fuel its available try Tower Hobbies Also use 5 x 3 Cox propeller recently introduced Shuriken brings new dimension performance 1 /2A en gines Shuriken considerably out-turns Cox remarkably durable Unlike Cox will go over hill gets little lean probably metallurgical rea sons little ABC jewel will run run Shuriken will fit modified Fourmost mount Use smallest venturi option available Cox 5 x 3 prop works fine engine designed operate around 30000 rpm thinned-blade 5 x 3 works better state-of-the-art 1/2A engine can ordered BV Com petition Engines 1163 Country Club Rd. Indianapolis IN 46234 third engine option Chinese CS Heavier Cox Shuriken CS develops optimal power higher rpm cut-down Cox 5 x 3 prop perhaps 4in diameter required pressure backplate CS now available United States Use sport version unless want fool tuned pipe Flying 2-oz fuel tank shown will sus tain long flights youre new flying use half-filled tank begin Position model will break ground downwind side circle Keep low un til youve built up enough speed cer tain engine wont sag Correct ten dency bank out Check wings remain level inverted flight Once model fully trimmed youre ready begin maneuvers Try AMA Precision Aerobatics routine Its good way have fun honing flying skillsEl CL Aerobatics/McMiIIan Continued page 64 focus need place proper relation ship overall length wing get size appropriate other parts plane Note again trying get everything same scale Rather goal get shapes relationships correct within bounds set early good moments Rscogn aed Cats fed Aedeasne PeNs___ FeNoeLi Pow E26225ff25 54fec Only cetified checks money odes accepted Minimum ode $1400 thee packages 4 Pomerpoles $400 pe package 0200 Shipping handling CT esidents add sales tan Prines subject change withoot notice DEALER INQUIRIES INVITED further intomarion dealet prices send SASS end Susiness Card SERMOS R/C SNAP CONNECTOR8 Inc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 156 Model Aviation
Edition: Model Aviation - 1991/04
Page Numbers: 60, 61, 62, 63, 155, 156
A sleek little Sport Stunt model takes CL Aerobatics new heights performance Its great way try out latest best engines Design Bill Winter Text John Hunton DESIGNED take advantage new est best engines Control Line Sport Stunter flies well its good looks suggest less maximal still adequate performance Akro Bat Jr can also flown Kustom Krafts manship Cox engine Bill Winter have updated two Bills classic RC designs during past few years RC Special published Model Aviation March April 1990 Cloud Niner revision Krackerjac will appear RC Modeler Cloud Niner extended flight enve lope low velocity end using flap erons split flaps decided carry idea further next project stretching performance envelope high-velocity end keeping lowend gains other words new model should have exceptionally wide perform ance capability Collaborating Bill has reward ing Hes thoughtful man superb de sign talent everything turns out has magic touch latest project no time Bill produced sketches short-coupled shoulder-wing model distinctive lines proportions trademark test design volun teered execute /2A RC version drawing board found myself visualiz ing Control Line Sport Stunt model stead Bills response sug gested scaling down empennage lengthening nose Otherwise lines re mained same dubbed model Akro Bat Jr models took first place last years Northern Virginia Control Line /2A Stunt contest aesthetically its sort blah couldnt imagine people wanting build Akro Bat could would look good 3D did paper would fly Two weeks later answer little model makes high-performance hA CL flight reality Equipped maneu vering flaps tight squares Akro Bat does allinside loops outside loops 60 Model Aviation Above Ciean good looks spectacuiar aerobatics capabiiity halimarks Blii Winters designs CL Sport Stunter great practicing AMA pattern Modei covered Japanese tissue biack trim vinyi stick-on iettering 9elow Overhead view showing rhythm ribs pieasing ilnes needie-pointed nose singie screw hoids wing stress taken dowel runs front wing plywood key former canopy attached two parts joint overiapped Sporting winter beard Austraiian hat author gives scaie diminutive CL Sport Stunter Biii originaiiy designed airpiane 40 RC iooked good author suggested 1/aA CL rendition first hat After years fiylng modeis sun sun iooks back squared loops verticalsand looks good doing Bill really pushed back per formance margins Fly Kustom Kraftsmanship Cox engine has plenty reliable power set up noted later go full performance potent new Shuriken Chinese-made CS engines zoom through sky fast its scary Tests run 35-ft 012 braided lines longer ones will needed fly full Stunt Shuriken addition providing goad engine ac cessibility Fourmost engine mount adds streamlining simplifies construc tion removable wing borrowed RC technology gives easy accessibility controls fuel system model combines full pattern capabil ity compactness economy adjustable line tension features smooth positive controls make excel lent choice beginners Construction Akro Bat Jr unusually easy build two reasons First accu rate fuselage alignment automatic once youve installed plywood key former landing gear mounting plate Sec ond because top spar flat like bottom continuous wing built flat workbench rather air Fuselage Cut sides medium balsa taking care cut key former slots accurately sure make both right side left Cut doublers medi um-soft wood formers relatively firm stock Cut out plywood parts Install doublers longerons fuselage side Slip glue key former position install landing gear mounting plate fuselage now accu rate alignment Hint Strengthen criti cal joints sprinlding baking soda soaking CyA cyanoacry late glue complete structural assembly glue sides together rear install front balsa former Install remaining formers interior parts Block sand fuselage flat top bottom add front rear top bottom sheet ing Carve block sand nose quarter panels conform front former stall quarter panel sheets Flatten nose accurately sanding block insert blind nuts install front plywood fire wall Finish sand fuselage Before install ing empennage drop tail skid rear panel sprinide baking soda apply CyA wing built topside down Lay plan flat board full length wingspan cover waxed paper Use firm balsa spars top bottom spars continuous tip tip Pin top spar flat building board letting extend second panel April 1991 61 ne mapr miruciura componenia gi iuu.ug una ian tuna sides preassembled longerons Buiiding strong lightweight tail easier man looks installing key former landing gear mounting plate brings fuselage accurate alignment Pulling tall halves together removes twist Assembly simple can done off board author strengthens important joints sprinkling baking soda make small fillet soaking thin CyA cyanoacryiste glue Cidee-up wing before covering Both top bottom spars continuous tip tIp Since upper spar also fiat wing built fiat board air will built first panel com plete remove plan spray WD-40 make transparent Reverse plan build second panel over Add top spar doubler Cut out po sition ribs Slip support member onto plan support align ribs shown glue spar Because lines controls exter nal wing assembly easier Stunt models wing can com pletely assembled finish sanded before cutting flaps loose Cut trailing edge parts length Notch glue trailing edge ribs Install partial bottom spar bottom spar Glue flap spars flap leading edges add remaining flap rib parts Trim leading edge proper depth install Add half ribs tip parts Sheet wing assembly Install out board wing tip weight box Trim lead ing edge knife shape carefully symmetrically Smooth wing long flat sanding block Cut flaps loose provide least A2 minimum clearance end Empennage tail designed strength light weight assembly less difficult looks Cut cores soft balsa edge firm balsa Block sand tail flat Round leading edges taper trailing edges desired Final assembly Install engine mount landing gear fuselage Fit wing fuselage taking care form neat tight joint Its good idea mark wing leading edge plywood hole firewall accurate drilling After cov ering tail surfaces ftiselage re moving covering jointing occurs mount tail wing place check its properly aligned wing Controls Cut down Perfect 3-in bellcrank access inner holes approx imately 23-in lead-out spacing Youll also using inner pushrod hole ap proximately 06 center Drill ball connector fit inside pushrod ap proximately 045 center Install connector Use 2-56 RC pushrod devises install adjustable pushrod end links elevator horn Use 020 minimum lead-outs pushrod exits forward stabilizer hooks has adjustable RC link horn mounted top elevator bellcrank Wrap ends tightly prevent snagging fuselage side allow outer eyes pass through adjustable lead-out guide Mount elevator horn top elevator flap linkages RC aileron links rigged exit bottom wing Cut link short install both wing solder glue oper ate unison Add clevis Use RC pushrod connect flap linkage ball link belicrank Finishing Youll probably want cover model heat-shrink materials case follow instructions included materials prototype covered Japanese tissue several reasons Its light easy use gives colorful taut attractive re sult Prime surfaces nitrate butyrate used Sig spray butyrate smooth fine-grade sandpaper Repeat process everything sealed sanded smooth cut tissue parts allowing overlapping Apply unthinned dope around perime ter parts covered Spray tis sue fine mist water adhere quickly before its soggy youve mistak enly selected wrapping paper rather 62 Model Aviation RC aileron linkage hooked up used actuate flaps internal reinforce ment shown removing material help bail link clear wing no problem removable wing allows good access controls fuel tank Flaps actuated via bail link cut-down 3in Perfect belicrank permitting easy removal installation wing Chinese CS engine recently introduced high-powered hA engines really bring model life CS operates best higher rpmhence biaded propeller Half 5 x 3 prop works well tuned pipe can used minipipe about 3 works well less sensitive tuned pipe conservative power setup Kustom Kraftsmanship Cox engine installed Fourmost mount turning 5 x 3 Cox propeller pressure backplate engine gives reliable performance fabulous Shuriken custom metal engine mount interchangeable Fourmost mount engine offers another magnitude power flying holds setting beginning end thinned-blade 5 x 3 prop ideal Full-Size Plans AvaIlable . See Page 180 ALLRJBS I/IR6ALSA FRJ7~MF KRO BATI/S CL SPORT-STUNT DESIGN ST WILLIAM J WINTER ENGINEERED AND DRAWN BY JOHN HUNTONNOV 90 CUT FROM 3/4 T K STOCK 4 ISHARDl/4S4 SM 3/4 STOCK LEBOX OThER TIP 3/16 DOWELNOTE ALL WOOD I/K GLUE TO FUSESPLIT CANOPY OVERLAP J7P 049 ENS i1Qj Japanese tissue youll know point paper will fall apart Lay tissue place pulling out noticeable wrinides Seal edges dope Cover both sides part youre working dry thoroughly spray clear dope added strength Spray brush parts clear butyrate use thinned dope brushing dope has dried completely sand everything fine paper sand through tissue touch up felt-tipped pen similar color Apply additional coats dope strength en seal surface Add AMA num ber decoration sure use strong hinges pin secure grip Canopy Trim canopy fit model Cut two attach front half front fuselage rear half wing Trim off enough rear canopy slip front part wing place glue canopy first front rear Rigging Developing good margin sta bility line tension depends several important factors B Rudder offset provides outward angle crab Ample rudder offset shown plan Line guide An adjustable line guide shown farther back lead-outs greater outward crab angle crab angle tauter lines Start plenty crab angle reduce maximum efficiency may need crab windy days Balance point Make sure model bal ances either center-of-gravity shown farther forward add ballast necessary Dont attempt fly tail-heavy airplane better control response move bal ance point rearward increments B Wing tip weight weight box pro vided Again start weight necessary say 1 oz reduce match conditions Seal box plastic tape Elevator deflection Maximum should 20 degrees Engines standard Cox TD 049 provides adequate power youll need pres sure fuel system complete reliability Dont use timed pressure port stock Cox cut off pressure teat get stock Cox requires minimum pressure backplate Kustom Kraftsman ship KK best combination complete remanufactured KK Cox pressure backplate 72-turn needle valve undrilled venturi Cox plug reliable choice Modified ones available Kustom Kraftsmanship added power April 1991 63 Continued page JSS Left Side view Akro Bat showing adlustabie lead-out guide prototype wee flown using third fifth holes front 1 14 oz wing tip weight outboard weight box line tension excellentalthough outer tip dipped little during square maneuvers Start 1 14 02 remove weight match conditions Right lead-out guide lets vary holes use first flights windy-day sessions run lead-outs toward rear wing calm days run farther forward Movies/Filippova Continued page 59 RC Junkers about 10 feet wing span weighed about 14 pounds equipped Russian 10cc Raduga ser ial engines engines modified course As know Soviet-made serial en gines usually arent highest quality Milcaelian exacting producer has vivid impressions memories war wanted movie capture told Konstantin Sergei fly Junkers theyd appear exactly remembered producers idea show two Junkers flying other divebombing trench Russian soldier stood guard models expected fly side side very close other youve flown RC models know hard Also since cameras couldnt move up pilots maintain specified trajectory Any little mistake flying directly trench would ruin take film showed So viet soldier guarding trench Explosives buried close trench detonated bombs hit ground Another problem sequence bombing precisely Mikaelian wished wanted planes dive down eject bombs regular intervals af ter other took lot experimenting changes models special control mechanism get right everything producer wanted Konstantin Sergei made 20 flights together before cameras rolled flew bombing scene over over producing hours worth film scene lasted minute finished movie shooting finishedor thought morning Mikaelian announced hed come up another ideahe wanted show bombing appeared soldier the trench So crew moved south again search summer time city Tashkent As Konstantin told later shooting Tashkent absolutely terrible experience him Sergei create effect Mi kaelian wanted two modelers stand side side cameraman throw bombs down themselves operator watch bombs hurtling down pre cisely six bombs about 10 inches long made metal reached speed 120 mph modelers cooperated bravely course nobody wanted killed stayed cam era threw bombs down precisely possible directly camera bombs landed extremely close probably about eight inches stood Fortunately nobody killed Mi kaelian satisfied scene filming over last collaboration movie project A Push-Rod Selection Leaves Up InTheAir Its true offer complete line push-rods world thats important reason choose Sullivan push-rods fact once its model doesnt matter other push-rods carry just want yours work best its will Sullivan push-rods designed built maximum strength flexibility dependability Theyre also light weiit well simply best Which means get widest choice Sullivan PRODUCTS push-rods get best choice P0 Box 5166 Baltimore MD 21224 Getting Better Ideas Off Ground brings something new interesting Konstantin Sergei Vitaliy last signment movie called Afghani stan Brake about recent war Afghan istan film jointly produced Lenfilm Italian company Vladimir Bartko producer modelers job build two So viet MI-8 Helicopters planes tended flying models blown up movie Yet construction duplicate full-scale MI-8 exactly both side out because producer wanted explosion look realistic possi ble fuselage length about 83 ft Helicopters fairly large As turned out oaly models needed blew up realistically other Helicopter left intact ready used future movie about SovietAfghanistan conflict could years away course Afghanistan war has become just bad dream What would movie industry out models modelers Konstantin Ser gei Vitaliy hope continue team work years come IZ Akro Bat/Hunton Continued page 63 Its critical use Cox fuel Cox en gines incompatible fuels used en gine will perform normally after start-up April 1991 155 p I I I I I I I I I I I I I I * U U U U I U U U U I U I U U U U U U U U U U U 510 GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTQUART GALLON 0% Nitroniitharte $995 5% Nitromethane $495$1195 100/0 Nitromettart $95$535$1395 150/0 NllrQmethan $R25$1595 25% NitrolohaJ* $495$795$2095 350/0 NitromeThane $595 $895 $2595 SIG PREMIUM 4-STROKE FUEL 100/0 Nitromethane$1325 150/o Nitromethane$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure ye paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPOsaS subject tu uheeg notice See dealer first available order direct Call 1J 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 U U E UEUUUUUUU AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300 BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In Computer Designed 3 Axis Control Part 1 03 Ultralight0Easy Construction Wood Construction TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 start behaving setting wrong Use Cox racing fuel its available try Tower Hobbies Also use 5 x 3 Cox propeller recently introduced Shuriken brings new dimension performance 1 /2A en gines Shuriken considerably out-turns Cox remarkably durable Unlike Cox will go over hill gets little lean probably metallurgical rea sons little ABC jewel will run run Shuriken will fit modified Fourmost mount Use smallest venturi option available Cox 5 x 3 prop works fine engine designed operate around 30000 rpm thinned-blade 5 x 3 works better state-of-the-art 1/2A engine can ordered BV Com petition Engines 1163 Country Club Rd. Indianapolis IN 46234 third engine option Chinese CS Heavier Cox Shuriken CS develops optimal power higher rpm cut-down Cox 5 x 3 prop perhaps 4in diameter required pressure backplate CS now available United States Use sport version unless want fool tuned pipe Flying 2-oz fuel tank shown will sus tain long flights youre new flying use half-filled tank begin Position model will break ground downwind side circle Keep low un til youve built up enough speed cer tain engine wont sag Correct ten dency bank out Check wings remain level inverted flight Once model fully trimmed youre ready begin maneuvers Try AMA Precision Aerobatics routine Its good way have fun honing flying skillsEl CL Aerobatics/McMiIIan Continued page 64 focus need place proper relation ship overall length wing get size appropriate other parts plane Note again trying get everything same scale Rather goal get shapes relationships correct within bounds set early good moments Rscogn aed Cats fed Aedeasne PeNs___ FeNoeLi Pow E26225ff25 54fec Only cetified checks money odes accepted Minimum ode $1400 thee packages 4 Pomerpoles $400 pe package 0200 Shipping handling CT esidents add sales tan Prines subject change withoot notice DEALER INQUIRIES INVITED further intomarion dealet prices send SASS end Susiness Card SERMOS R/C SNAP CONNECTOR8 Inc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 156 Model Aviation
Edition: Model Aviation - 1991/04
Page Numbers: 60, 61, 62, 63, 155, 156
A sleek little Sport Stunt model takes CL Aerobatics new heights performance Its great way try out latest best engines Design Bill Winter Text John Hunton DESIGNED take advantage new est best engines Control Line Sport Stunter flies well its good looks suggest less maximal still adequate performance Akro Bat Jr can also flown Kustom Krafts manship Cox engine Bill Winter have updated two Bills classic RC designs during past few years RC Special published Model Aviation March April 1990 Cloud Niner revision Krackerjac will appear RC Modeler Cloud Niner extended flight enve lope low velocity end using flap erons split flaps decided carry idea further next project stretching performance envelope high-velocity end keeping lowend gains other words new model should have exceptionally wide perform ance capability Collaborating Bill has reward ing Hes thoughtful man superb de sign talent everything turns out has magic touch latest project no time Bill produced sketches short-coupled shoulder-wing model distinctive lines proportions trademark test design volun teered execute /2A RC version drawing board found myself visualiz ing Control Line Sport Stunt model stead Bills response sug gested scaling down empennage lengthening nose Otherwise lines re mained same dubbed model Akro Bat Jr models took first place last years Northern Virginia Control Line /2A Stunt contest aesthetically its sort blah couldnt imagine people wanting build Akro Bat could would look good 3D did paper would fly Two weeks later answer little model makes high-performance hA CL flight reality Equipped maneu vering flaps tight squares Akro Bat does allinside loops outside loops 60 Model Aviation Above Ciean good looks spectacuiar aerobatics capabiiity halimarks Blii Winters designs CL Sport Stunter great practicing AMA pattern Modei covered Japanese tissue biack trim vinyi stick-on iettering 9elow Overhead view showing rhythm ribs pieasing ilnes needie-pointed nose singie screw hoids wing stress taken dowel runs front wing plywood key former canopy attached two parts joint overiapped Sporting winter beard Austraiian hat author gives scaie diminutive CL Sport Stunter Biii originaiiy designed airpiane 40 RC iooked good author suggested 1/aA CL rendition first hat After years fiylng modeis sun sun iooks back squared loops verticalsand looks good doing Bill really pushed back per formance margins Fly Kustom Kraftsmanship Cox engine has plenty reliable power set up noted later go full performance potent new Shuriken Chinese-made CS engines zoom through sky fast its scary Tests run 35-ft 012 braided lines longer ones will needed fly full Stunt Shuriken addition providing goad engine ac cessibility Fourmost engine mount adds streamlining simplifies construc tion removable wing borrowed RC technology gives easy accessibility controls fuel system model combines full pattern capabil ity compactness economy adjustable line tension features smooth positive controls make excel lent choice beginners Construction Akro Bat Jr unusually easy build two reasons First accu rate fuselage alignment automatic once youve installed plywood key former landing gear mounting plate Sec ond because top spar flat like bottom continuous wing built flat workbench rather air Fuselage Cut sides medium balsa taking care cut key former slots accurately sure make both right side left Cut doublers medi um-soft wood formers relatively firm stock Cut out plywood parts Install doublers longerons fuselage side Slip glue key former position install landing gear mounting plate fuselage now accu rate alignment Hint Strengthen criti cal joints sprinlding baking soda soaking CyA cyanoacry late glue complete structural assembly glue sides together rear install front balsa former Install remaining formers interior parts Block sand fuselage flat top bottom add front rear top bottom sheet ing Carve block sand nose quarter panels conform front former stall quarter panel sheets Flatten nose accurately sanding block insert blind nuts install front plywood fire wall Finish sand fuselage Before install ing empennage drop tail skid rear panel sprinide baking soda apply CyA wing built topside down Lay plan flat board full length wingspan cover waxed paper Use firm balsa spars top bottom spars continuous tip tip Pin top spar flat building board letting extend second panel April 1991 61 ne mapr miruciura componenia gi iuu.ug una ian tuna sides preassembled longerons Buiiding strong lightweight tail easier man looks installing key former landing gear mounting plate brings fuselage accurate alignment Pulling tall halves together removes twist Assembly simple can done off board author strengthens important joints sprinkling baking soda make small fillet soaking thin CyA cyanoacryiste glue Cidee-up wing before covering Both top bottom spars continuous tip tIp Since upper spar also fiat wing built fiat board air will built first panel com plete remove plan spray WD-40 make transparent Reverse plan build second panel over Add top spar doubler Cut out po sition ribs Slip support member onto plan support align ribs shown glue spar Because lines controls exter nal wing assembly easier Stunt models wing can com pletely assembled finish sanded before cutting flaps loose Cut trailing edge parts length Notch glue trailing edge ribs Install partial bottom spar bottom spar Glue flap spars flap leading edges add remaining flap rib parts Trim leading edge proper depth install Add half ribs tip parts Sheet wing assembly Install out board wing tip weight box Trim lead ing edge knife shape carefully symmetrically Smooth wing long flat sanding block Cut flaps loose provide least A2 minimum clearance end Empennage tail designed strength light weight assembly less difficult looks Cut cores soft balsa edge firm balsa Block sand tail flat Round leading edges taper trailing edges desired Final assembly Install engine mount landing gear fuselage Fit wing fuselage taking care form neat tight joint Its good idea mark wing leading edge plywood hole firewall accurate drilling After cov ering tail surfaces ftiselage re moving covering jointing occurs mount tail wing place check its properly aligned wing Controls Cut down Perfect 3-in bellcrank access inner holes approx imately 23-in lead-out spacing Youll also using inner pushrod hole ap proximately 06 center Drill ball connector fit inside pushrod ap proximately 045 center Install connector Use 2-56 RC pushrod devises install adjustable pushrod end links elevator horn Use 020 minimum lead-outs pushrod exits forward stabilizer hooks has adjustable RC link horn mounted top elevator bellcrank Wrap ends tightly prevent snagging fuselage side allow outer eyes pass through adjustable lead-out guide Mount elevator horn top elevator flap linkages RC aileron links rigged exit bottom wing Cut link short install both wing solder glue oper ate unison Add clevis Use RC pushrod connect flap linkage ball link belicrank Finishing Youll probably want cover model heat-shrink materials case follow instructions included materials prototype covered Japanese tissue several reasons Its light easy use gives colorful taut attractive re sult Prime surfaces nitrate butyrate used Sig spray butyrate smooth fine-grade sandpaper Repeat process everything sealed sanded smooth cut tissue parts allowing overlapping Apply unthinned dope around perime ter parts covered Spray tis sue fine mist water adhere quickly before its soggy youve mistak enly selected wrapping paper rather 62 Model Aviation RC aileron linkage hooked up used actuate flaps internal reinforce ment shown removing material help bail link clear wing no problem removable wing allows good access controls fuel tank Flaps actuated via bail link cut-down 3in Perfect belicrank permitting easy removal installation wing Chinese CS engine recently introduced high-powered hA engines really bring model life CS operates best higher rpmhence biaded propeller Half 5 x 3 prop works well tuned pipe can used minipipe about 3 works well less sensitive tuned pipe conservative power setup Kustom Kraftsmanship Cox engine installed Fourmost mount turning 5 x 3 Cox propeller pressure backplate engine gives reliable performance fabulous Shuriken custom metal engine mount interchangeable Fourmost mount engine offers another magnitude power flying holds setting beginning end thinned-blade 5 x 3 prop ideal Full-Size Plans AvaIlable . See Page 180 ALLRJBS I/IR6ALSA FRJ7~MF KRO BATI/S CL SPORT-STUNT DESIGN ST WILLIAM J WINTER ENGINEERED AND DRAWN BY JOHN HUNTONNOV 90 CUT FROM 3/4 T K STOCK 4 ISHARDl/4S4 SM 3/4 STOCK LEBOX OThER TIP 3/16 DOWELNOTE ALL WOOD I/K GLUE TO FUSESPLIT CANOPY OVERLAP J7P 049 ENS i1Qj Japanese tissue youll know point paper will fall apart Lay tissue place pulling out noticeable wrinides Seal edges dope Cover both sides part youre working dry thoroughly spray clear dope added strength Spray brush parts clear butyrate use thinned dope brushing dope has dried completely sand everything fine paper sand through tissue touch up felt-tipped pen similar color Apply additional coats dope strength en seal surface Add AMA num ber decoration sure use strong hinges pin secure grip Canopy Trim canopy fit model Cut two attach front half front fuselage rear half wing Trim off enough rear canopy slip front part wing place glue canopy first front rear Rigging Developing good margin sta bility line tension depends several important factors B Rudder offset provides outward angle crab Ample rudder offset shown plan Line guide An adjustable line guide shown farther back lead-outs greater outward crab angle crab angle tauter lines Start plenty crab angle reduce maximum efficiency may need crab windy days Balance point Make sure model bal ances either center-of-gravity shown farther forward add ballast necessary Dont attempt fly tail-heavy airplane better control response move bal ance point rearward increments B Wing tip weight weight box pro vided Again start weight necessary say 1 oz reduce match conditions Seal box plastic tape Elevator deflection Maximum should 20 degrees Engines standard Cox TD 049 provides adequate power youll need pres sure fuel system complete reliability Dont use timed pressure port stock Cox cut off pressure teat get stock Cox requires minimum pressure backplate Kustom Kraftsman ship KK best combination complete remanufactured KK Cox pressure backplate 72-turn needle valve undrilled venturi Cox plug reliable choice Modified ones available Kustom Kraftsmanship added power April 1991 63 Continued page JSS Left Side view Akro Bat showing adlustabie lead-out guide prototype wee flown using third fifth holes front 1 14 oz wing tip weight outboard weight box line tension excellentalthough outer tip dipped little during square maneuvers Start 1 14 02 remove weight match conditions Right lead-out guide lets vary holes use first flights windy-day sessions run lead-outs toward rear wing calm days run farther forward Movies/Filippova Continued page 59 RC Junkers about 10 feet wing span weighed about 14 pounds equipped Russian 10cc Raduga ser ial engines engines modified course As know Soviet-made serial en gines usually arent highest quality Milcaelian exacting producer has vivid impressions memories war wanted movie capture told Konstantin Sergei fly Junkers theyd appear exactly remembered producers idea show two Junkers flying other divebombing trench Russian soldier stood guard models expected fly side side very close other youve flown RC models know hard Also since cameras couldnt move up pilots maintain specified trajectory Any little mistake flying directly trench would ruin take film showed So viet soldier guarding trench Explosives buried close trench detonated bombs hit ground Another problem sequence bombing precisely Mikaelian wished wanted planes dive down eject bombs regular intervals af ter other took lot experimenting changes models special control mechanism get right everything producer wanted Konstantin Sergei made 20 flights together before cameras rolled flew bombing scene over over producing hours worth film scene lasted minute finished movie shooting finishedor thought morning Mikaelian announced hed come up another ideahe wanted show bombing appeared soldier the trench So crew moved south again search summer time city Tashkent As Konstantin told later shooting Tashkent absolutely terrible experience him Sergei create effect Mi kaelian wanted two modelers stand side side cameraman throw bombs down themselves operator watch bombs hurtling down pre cisely six bombs about 10 inches long made metal reached speed 120 mph modelers cooperated bravely course nobody wanted killed stayed cam era threw bombs down precisely possible directly camera bombs landed extremely close probably about eight inches stood Fortunately nobody killed Mi kaelian satisfied scene filming over last collaboration movie project A Push-Rod Selection Leaves Up InTheAir Its true offer complete line push-rods world thats important reason choose Sullivan push-rods fact once its model doesnt matter other push-rods carry just want yours work best its will Sullivan push-rods designed built maximum strength flexibility dependability Theyre also light weiit well simply best Which means get widest choice Sullivan PRODUCTS push-rods get best choice P0 Box 5166 Baltimore MD 21224 Getting Better Ideas Off Ground brings something new interesting Konstantin Sergei Vitaliy last signment movie called Afghani stan Brake about recent war Afghan istan film jointly produced Lenfilm Italian company Vladimir Bartko producer modelers job build two So viet MI-8 Helicopters planes tended flying models blown up movie Yet construction duplicate full-scale MI-8 exactly both side out because producer wanted explosion look realistic possi ble fuselage length about 83 ft Helicopters fairly large As turned out oaly models needed blew up realistically other Helicopter left intact ready used future movie about SovietAfghanistan conflict could years away course Afghanistan war has become just bad dream What would movie industry out models modelers Konstantin Ser gei Vitaliy hope continue team work years come IZ Akro Bat/Hunton Continued page 63 Its critical use Cox fuel Cox en gines incompatible fuels used en gine will perform normally after start-up April 1991 155 p I I I I I I I I I I I I I I * U U U U I U U U U I U I U U U U U U U U U U U 510 GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTQUART GALLON 0% Nitroniitharte $995 5% Nitromethane $495$1195 100/0 Nitromettart $95$535$1395 150/0 NllrQmethan $R25$1595 25% NitrolohaJ* $495$795$2095 350/0 NitromeThane $595 $895 $2595 SIG PREMIUM 4-STROKE FUEL 100/0 Nitromethane$1325 150/o Nitromethane$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure ye paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPOsaS subject tu uheeg notice See dealer first available order direct Call 1J 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 U U E UEUUUUUUU AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300 BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In Computer Designed 3 Axis Control Part 1 03 Ultralight0Easy Construction Wood Construction TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 start behaving setting wrong Use Cox racing fuel its available try Tower Hobbies Also use 5 x 3 Cox propeller recently introduced Shuriken brings new dimension performance 1 /2A en gines Shuriken considerably out-turns Cox remarkably durable Unlike Cox will go over hill gets little lean probably metallurgical rea sons little ABC jewel will run run Shuriken will fit modified Fourmost mount Use smallest venturi option available Cox 5 x 3 prop works fine engine designed operate around 30000 rpm thinned-blade 5 x 3 works better state-of-the-art 1/2A engine can ordered BV Com petition Engines 1163 Country Club Rd. Indianapolis IN 46234 third engine option Chinese CS Heavier Cox Shuriken CS develops optimal power higher rpm cut-down Cox 5 x 3 prop perhaps 4in diameter required pressure backplate CS now available United States Use sport version unless want fool tuned pipe Flying 2-oz fuel tank shown will sus tain long flights youre new flying use half-filled tank begin Position model will break ground downwind side circle Keep low un til youve built up enough speed cer tain engine wont sag Correct ten dency bank out Check wings remain level inverted flight Once model fully trimmed youre ready begin maneuvers Try AMA Precision Aerobatics routine Its good way have fun honing flying skillsEl CL Aerobatics/McMiIIan Continued page 64 focus need place proper relation ship overall length wing get size appropriate other parts plane Note again trying get everything same scale Rather goal get shapes relationships correct within bounds set early good moments Rscogn aed Cats fed Aedeasne PeNs___ FeNoeLi Pow E26225ff25 54fec Only cetified checks money odes accepted Minimum ode $1400 thee packages 4 Pomerpoles $400 pe package 0200 Shipping handling CT esidents add sales tan Prines subject change withoot notice DEALER INQUIRIES INVITED further intomarion dealet prices send SASS end Susiness Card SERMOS R/C SNAP CONNECTOR8 Inc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 156 Model Aviation
Edition: Model Aviation - 1991/04
Page Numbers: 60, 61, 62, 63, 155, 156
A sleek little Sport Stunt model takes CL Aerobatics new heights performance Its great way try out latest best engines Design Bill Winter Text John Hunton DESIGNED take advantage new est best engines Control Line Sport Stunter flies well its good looks suggest less maximal still adequate performance Akro Bat Jr can also flown Kustom Krafts manship Cox engine Bill Winter have updated two Bills classic RC designs during past few years RC Special published Model Aviation March April 1990 Cloud Niner revision Krackerjac will appear RC Modeler Cloud Niner extended flight enve lope low velocity end using flap erons split flaps decided carry idea further next project stretching performance envelope high-velocity end keeping lowend gains other words new model should have exceptionally wide perform ance capability Collaborating Bill has reward ing Hes thoughtful man superb de sign talent everything turns out has magic touch latest project no time Bill produced sketches short-coupled shoulder-wing model distinctive lines proportions trademark test design volun teered execute /2A RC version drawing board found myself visualiz ing Control Line Sport Stunt model stead Bills response sug gested scaling down empennage lengthening nose Otherwise lines re mained same dubbed model Akro Bat Jr models took first place last years Northern Virginia Control Line /2A Stunt contest aesthetically its sort blah couldnt imagine people wanting build Akro Bat could would look good 3D did paper would fly Two weeks later answer little model makes high-performance hA CL flight reality Equipped maneu vering flaps tight squares Akro Bat does allinside loops outside loops 60 Model Aviation Above Ciean good looks spectacuiar aerobatics capabiiity halimarks Blii Winters designs CL Sport Stunter great practicing AMA pattern Modei covered Japanese tissue biack trim vinyi stick-on iettering 9elow Overhead view showing rhythm ribs pieasing ilnes needie-pointed nose singie screw hoids wing stress taken dowel runs front wing plywood key former canopy attached two parts joint overiapped Sporting winter beard Austraiian hat author gives scaie diminutive CL Sport Stunter Biii originaiiy designed airpiane 40 RC iooked good author suggested 1/aA CL rendition first hat After years fiylng modeis sun sun iooks back squared loops verticalsand looks good doing Bill really pushed back per formance margins Fly Kustom Kraftsmanship Cox engine has plenty reliable power set up noted later go full performance potent new Shuriken Chinese-made CS engines zoom through sky fast its scary Tests run 35-ft 012 braided lines longer ones will needed fly full Stunt Shuriken addition providing goad engine ac cessibility Fourmost engine mount adds streamlining simplifies construc tion removable wing borrowed RC technology gives easy accessibility controls fuel system model combines full pattern capabil ity compactness economy adjustable line tension features smooth positive controls make excel lent choice beginners Construction Akro Bat Jr unusually easy build two reasons First accu rate fuselage alignment automatic once youve installed plywood key former landing gear mounting plate Sec ond because top spar flat like bottom continuous wing built flat workbench rather air Fuselage Cut sides medium balsa taking care cut key former slots accurately sure make both right side left Cut doublers medi um-soft wood formers relatively firm stock Cut out plywood parts Install doublers longerons fuselage side Slip glue key former position install landing gear mounting plate fuselage now accu rate alignment Hint Strengthen criti cal joints sprinlding baking soda soaking CyA cyanoacry late glue complete structural assembly glue sides together rear install front balsa former Install remaining formers interior parts Block sand fuselage flat top bottom add front rear top bottom sheet ing Carve block sand nose quarter panels conform front former stall quarter panel sheets Flatten nose accurately sanding block insert blind nuts install front plywood fire wall Finish sand fuselage Before install ing empennage drop tail skid rear panel sprinide baking soda apply CyA wing built topside down Lay plan flat board full length wingspan cover waxed paper Use firm balsa spars top bottom spars continuous tip tip Pin top spar flat building board letting extend second panel April 1991 61 ne mapr miruciura componenia gi iuu.ug una ian tuna sides preassembled longerons Buiiding strong lightweight tail easier man looks installing key former landing gear mounting plate brings fuselage accurate alignment Pulling tall halves together removes twist Assembly simple can done off board author strengthens important joints sprinkling baking soda make small fillet soaking thin CyA cyanoacryiste glue Cidee-up wing before covering Both top bottom spars continuous tip tIp Since upper spar also fiat wing built fiat board air will built first panel com plete remove plan spray WD-40 make transparent Reverse plan build second panel over Add top spar doubler Cut out po sition ribs Slip support member onto plan support align ribs shown glue spar Because lines controls exter nal wing assembly easier Stunt models wing can com pletely assembled finish sanded before cutting flaps loose Cut trailing edge parts length Notch glue trailing edge ribs Install partial bottom spar bottom spar Glue flap spars flap leading edges add remaining flap rib parts Trim leading edge proper depth install Add half ribs tip parts Sheet wing assembly Install out board wing tip weight box Trim lead ing edge knife shape carefully symmetrically Smooth wing long flat sanding block Cut flaps loose provide least A2 minimum clearance end Empennage tail designed strength light weight assembly less difficult looks Cut cores soft balsa edge firm balsa Block sand tail flat Round leading edges taper trailing edges desired Final assembly Install engine mount landing gear fuselage Fit wing fuselage taking care form neat tight joint Its good idea mark wing leading edge plywood hole firewall accurate drilling After cov ering tail surfaces ftiselage re moving covering jointing occurs mount tail wing place check its properly aligned wing Controls Cut down Perfect 3-in bellcrank access inner holes approx imately 23-in lead-out spacing Youll also using inner pushrod hole ap proximately 06 center Drill ball connector fit inside pushrod ap proximately 045 center Install connector Use 2-56 RC pushrod devises install adjustable pushrod end links elevator horn Use 020 minimum lead-outs pushrod exits forward stabilizer hooks has adjustable RC link horn mounted top elevator bellcrank Wrap ends tightly prevent snagging fuselage side allow outer eyes pass through adjustable lead-out guide Mount elevator horn top elevator flap linkages RC aileron links rigged exit bottom wing Cut link short install both wing solder glue oper ate unison Add clevis Use RC pushrod connect flap linkage ball link belicrank Finishing Youll probably want cover model heat-shrink materials case follow instructions included materials prototype covered Japanese tissue several reasons Its light easy use gives colorful taut attractive re sult Prime surfaces nitrate butyrate used Sig spray butyrate smooth fine-grade sandpaper Repeat process everything sealed sanded smooth cut tissue parts allowing overlapping Apply unthinned dope around perime ter parts covered Spray tis sue fine mist water adhere quickly before its soggy youve mistak enly selected wrapping paper rather 62 Model Aviation RC aileron linkage hooked up used actuate flaps internal reinforce ment shown removing material help bail link clear wing no problem removable wing allows good access controls fuel tank Flaps actuated via bail link cut-down 3in Perfect belicrank permitting easy removal installation wing Chinese CS engine recently introduced high-powered hA engines really bring model life CS operates best higher rpmhence biaded propeller Half 5 x 3 prop works well tuned pipe can used minipipe about 3 works well less sensitive tuned pipe conservative power setup Kustom Kraftsmanship Cox engine installed Fourmost mount turning 5 x 3 Cox propeller pressure backplate engine gives reliable performance fabulous Shuriken custom metal engine mount interchangeable Fourmost mount engine offers another magnitude power flying holds setting beginning end thinned-blade 5 x 3 prop ideal Full-Size Plans AvaIlable . See Page 180 ALLRJBS I/IR6ALSA FRJ7~MF KRO BATI/S CL SPORT-STUNT DESIGN ST WILLIAM J WINTER ENGINEERED AND DRAWN BY JOHN HUNTONNOV 90 CUT FROM 3/4 T K STOCK 4 ISHARDl/4S4 SM 3/4 STOCK LEBOX OThER TIP 3/16 DOWELNOTE ALL WOOD I/K GLUE TO FUSESPLIT CANOPY OVERLAP J7P 049 ENS i1Qj Japanese tissue youll know point paper will fall apart Lay tissue place pulling out noticeable wrinides Seal edges dope Cover both sides part youre working dry thoroughly spray clear dope added strength Spray brush parts clear butyrate use thinned dope brushing dope has dried completely sand everything fine paper sand through tissue touch up felt-tipped pen similar color Apply additional coats dope strength en seal surface Add AMA num ber decoration sure use strong hinges pin secure grip Canopy Trim canopy fit model Cut two attach front half front fuselage rear half wing Trim off enough rear canopy slip front part wing place glue canopy first front rear Rigging Developing good margin sta bility line tension depends several important factors B Rudder offset provides outward angle crab Ample rudder offset shown plan Line guide An adjustable line guide shown farther back lead-outs greater outward crab angle crab angle tauter lines Start plenty crab angle reduce maximum efficiency may need crab windy days Balance point Make sure model bal ances either center-of-gravity shown farther forward add ballast necessary Dont attempt fly tail-heavy airplane better control response move bal ance point rearward increments B Wing tip weight weight box pro vided Again start weight necessary say 1 oz reduce match conditions Seal box plastic tape Elevator deflection Maximum should 20 degrees Engines standard Cox TD 049 provides adequate power youll need pres sure fuel system complete reliability Dont use timed pressure port stock Cox cut off pressure teat get stock Cox requires minimum pressure backplate Kustom Kraftsman ship KK best combination complete remanufactured KK Cox pressure backplate 72-turn needle valve undrilled venturi Cox plug reliable choice Modified ones available Kustom Kraftsmanship added power April 1991 63 Continued page JSS Left Side view Akro Bat showing adlustabie lead-out guide prototype wee flown using third fifth holes front 1 14 oz wing tip weight outboard weight box line tension excellentalthough outer tip dipped little during square maneuvers Start 1 14 02 remove weight match conditions Right lead-out guide lets vary holes use first flights windy-day sessions run lead-outs toward rear wing calm days run farther forward Movies/Filippova Continued page 59 RC Junkers about 10 feet wing span weighed about 14 pounds equipped Russian 10cc Raduga ser ial engines engines modified course As know Soviet-made serial en gines usually arent highest quality Milcaelian exacting producer has vivid impressions memories war wanted movie capture told Konstantin Sergei fly Junkers theyd appear exactly remembered producers idea show two Junkers flying other divebombing trench Russian soldier stood guard models expected fly side side very close other youve flown RC models know hard Also since cameras couldnt move up pilots maintain specified trajectory Any little mistake flying directly trench would ruin take film showed So viet soldier guarding trench Explosives buried close trench detonated bombs hit ground Another problem sequence bombing precisely Mikaelian wished wanted planes dive down eject bombs regular intervals af ter other took lot experimenting changes models special control mechanism get right everything producer wanted Konstantin Sergei made 20 flights together before cameras rolled flew bombing scene over over producing hours worth film scene lasted minute finished movie shooting finishedor thought morning Mikaelian announced hed come up another ideahe wanted show bombing appeared soldier the trench So crew moved south again search summer time city Tashkent As Konstantin told later shooting Tashkent absolutely terrible experience him Sergei create effect Mi kaelian wanted two modelers stand side side cameraman throw bombs down themselves operator watch bombs hurtling down pre cisely six bombs about 10 inches long made metal reached speed 120 mph modelers cooperated bravely course nobody wanted killed stayed cam era threw bombs down precisely possible directly camera bombs landed extremely close probably about eight inches stood Fortunately nobody killed Mi kaelian satisfied scene filming over last collaboration movie project A Push-Rod Selection Leaves Up InTheAir Its true offer complete line push-rods world thats important reason choose Sullivan push-rods fact once its model doesnt matter other push-rods carry just want yours work best its will Sullivan push-rods designed built maximum strength flexibility dependability Theyre also light weiit well simply best Which means get widest choice Sullivan PRODUCTS push-rods get best choice P0 Box 5166 Baltimore MD 21224 Getting Better Ideas Off Ground brings something new interesting Konstantin Sergei Vitaliy last signment movie called Afghani stan Brake about recent war Afghan istan film jointly produced Lenfilm Italian company Vladimir Bartko producer modelers job build two So viet MI-8 Helicopters planes tended flying models blown up movie Yet construction duplicate full-scale MI-8 exactly both side out because producer wanted explosion look realistic possi ble fuselage length about 83 ft Helicopters fairly large As turned out oaly models needed blew up realistically other Helicopter left intact ready used future movie about SovietAfghanistan conflict could years away course Afghanistan war has become just bad dream What would movie industry out models modelers Konstantin Ser gei Vitaliy hope continue team work years come IZ Akro Bat/Hunton Continued page 63 Its critical use Cox fuel Cox en gines incompatible fuels used en gine will perform normally after start-up April 1991 155 p I I I I I I I I I I I I I I * U U U U I U U U U I U I U U U U U U U U U U U 510 GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTQUART GALLON 0% Nitroniitharte $995 5% Nitromethane $495$1195 100/0 Nitromettart $95$535$1395 150/0 NllrQmethan $R25$1595 25% NitrolohaJ* $495$795$2095 350/0 NitromeThane $595 $895 $2595 SIG PREMIUM 4-STROKE FUEL 100/0 Nitromethane$1325 150/o Nitromethane$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure ye paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPOsaS subject tu uheeg notice See dealer first available order direct Call 1J 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 U U E UEUUUUUUU AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300 BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In Computer Designed 3 Axis Control Part 1 03 Ultralight0Easy Construction Wood Construction TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 start behaving setting wrong Use Cox racing fuel its available try Tower Hobbies Also use 5 x 3 Cox propeller recently introduced Shuriken brings new dimension performance 1 /2A en gines Shuriken considerably out-turns Cox remarkably durable Unlike Cox will go over hill gets little lean probably metallurgical rea sons little ABC jewel will run run Shuriken will fit modified Fourmost mount Use smallest venturi option available Cox 5 x 3 prop works fine engine designed operate around 30000 rpm thinned-blade 5 x 3 works better state-of-the-art 1/2A engine can ordered BV Com petition Engines 1163 Country Club Rd. Indianapolis IN 46234 third engine option Chinese CS Heavier Cox Shuriken CS develops optimal power higher rpm cut-down Cox 5 x 3 prop perhaps 4in diameter required pressure backplate CS now available United States Use sport version unless want fool tuned pipe Flying 2-oz fuel tank shown will sus tain long flights youre new flying use half-filled tank begin Position model will break ground downwind side circle Keep low un til youve built up enough speed cer tain engine wont sag Correct ten dency bank out Check wings remain level inverted flight Once model fully trimmed youre ready begin maneuvers Try AMA Precision Aerobatics routine Its good way have fun honing flying skillsEl CL Aerobatics/McMiIIan Continued page 64 focus need place proper relation ship overall length wing get size appropriate other parts plane Note again trying get everything same scale Rather goal get shapes relationships correct within bounds set early good moments Rscogn aed Cats fed Aedeasne PeNs___ FeNoeLi Pow E26225ff25 54fec Only cetified checks money odes accepted Minimum ode $1400 thee packages 4 Pomerpoles $400 pe package 0200 Shipping handling CT esidents add sales tan Prines subject change withoot notice DEALER INQUIRIES INVITED further intomarion dealet prices send SASS end Susiness Card SERMOS R/C SNAP CONNECTOR8 Inc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 156 Model Aviation
Edition: Model Aviation - 1991/04
Page Numbers: 60, 61, 62, 63, 155, 156
A sleek little Sport Stunt model takes CL Aerobatics new heights performance Its great way try out latest best engines Design Bill Winter Text John Hunton DESIGNED take advantage new est best engines Control Line Sport Stunter flies well its good looks suggest less maximal still adequate performance Akro Bat Jr can also flown Kustom Krafts manship Cox engine Bill Winter have updated two Bills classic RC designs during past few years RC Special published Model Aviation March April 1990 Cloud Niner revision Krackerjac will appear RC Modeler Cloud Niner extended flight enve lope low velocity end using flap erons split flaps decided carry idea further next project stretching performance envelope high-velocity end keeping lowend gains other words new model should have exceptionally wide perform ance capability Collaborating Bill has reward ing Hes thoughtful man superb de sign talent everything turns out has magic touch latest project no time Bill produced sketches short-coupled shoulder-wing model distinctive lines proportions trademark test design volun teered execute /2A RC version drawing board found myself visualiz ing Control Line Sport Stunt model stead Bills response sug gested scaling down empennage lengthening nose Otherwise lines re mained same dubbed model Akro Bat Jr models took first place last years Northern Virginia Control Line /2A Stunt contest aesthetically its sort blah couldnt imagine people wanting build Akro Bat could would look good 3D did paper would fly Two weeks later answer little model makes high-performance hA CL flight reality Equipped maneu vering flaps tight squares Akro Bat does allinside loops outside loops 60 Model Aviation Above Ciean good looks spectacuiar aerobatics capabiiity halimarks Blii Winters designs CL Sport Stunter great practicing AMA pattern Modei covered Japanese tissue biack trim vinyi stick-on iettering 9elow Overhead view showing rhythm ribs pieasing ilnes needie-pointed nose singie screw hoids wing stress taken dowel runs front wing plywood key former canopy attached two parts joint overiapped Sporting winter beard Austraiian hat author gives scaie diminutive CL Sport Stunter Biii originaiiy designed airpiane 40 RC iooked good author suggested 1/aA CL rendition first hat After years fiylng modeis sun sun iooks back squared loops verticalsand looks good doing Bill really pushed back per formance margins Fly Kustom Kraftsmanship Cox engine has plenty reliable power set up noted later go full performance potent new Shuriken Chinese-made CS engines zoom through sky fast its scary Tests run 35-ft 012 braided lines longer ones will needed fly full Stunt Shuriken addition providing goad engine ac cessibility Fourmost engine mount adds streamlining simplifies construc tion removable wing borrowed RC technology gives easy accessibility controls fuel system model combines full pattern capabil ity compactness economy adjustable line tension features smooth positive controls make excel lent choice beginners Construction Akro Bat Jr unusually easy build two reasons First accu rate fuselage alignment automatic once youve installed plywood key former landing gear mounting plate Sec ond because top spar flat like bottom continuous wing built flat workbench rather air Fuselage Cut sides medium balsa taking care cut key former slots accurately sure make both right side left Cut doublers medi um-soft wood formers relatively firm stock Cut out plywood parts Install doublers longerons fuselage side Slip glue key former position install landing gear mounting plate fuselage now accu rate alignment Hint Strengthen criti cal joints sprinlding baking soda soaking CyA cyanoacry late glue complete structural assembly glue sides together rear install front balsa former Install remaining formers interior parts Block sand fuselage flat top bottom add front rear top bottom sheet ing Carve block sand nose quarter panels conform front former stall quarter panel sheets Flatten nose accurately sanding block insert blind nuts install front plywood fire wall Finish sand fuselage Before install ing empennage drop tail skid rear panel sprinide baking soda apply CyA wing built topside down Lay plan flat board full length wingspan cover waxed paper Use firm balsa spars top bottom spars continuous tip tip Pin top spar flat building board letting extend second panel April 1991 61 ne mapr miruciura componenia gi iuu.ug una ian tuna sides preassembled longerons Buiiding strong lightweight tail easier man looks installing key former landing gear mounting plate brings fuselage accurate alignment Pulling tall halves together removes twist Assembly simple can done off board author strengthens important joints sprinkling baking soda make small fillet soaking thin CyA cyanoacryiste glue Cidee-up wing before covering Both top bottom spars continuous tip tIp Since upper spar also fiat wing built fiat board air will built first panel com plete remove plan spray WD-40 make transparent Reverse plan build second panel over Add top spar doubler Cut out po sition ribs Slip support member onto plan support align ribs shown glue spar Because lines controls exter nal wing assembly easier Stunt models wing can com pletely assembled finish sanded before cutting flaps loose Cut trailing edge parts length Notch glue trailing edge ribs Install partial bottom spar bottom spar Glue flap spars flap leading edges add remaining flap rib parts Trim leading edge proper depth install Add half ribs tip parts Sheet wing assembly Install out board wing tip weight box Trim lead ing edge knife shape carefully symmetrically Smooth wing long flat sanding block Cut flaps loose provide least A2 minimum clearance end Empennage tail designed strength light weight assembly less difficult looks Cut cores soft balsa edge firm balsa Block sand tail flat Round leading edges taper trailing edges desired Final assembly Install engine mount landing gear fuselage Fit wing fuselage taking care form neat tight joint Its good idea mark wing leading edge plywood hole firewall accurate drilling After cov ering tail surfaces ftiselage re moving covering jointing occurs mount tail wing place check its properly aligned wing Controls Cut down Perfect 3-in bellcrank access inner holes approx imately 23-in lead-out spacing Youll also using inner pushrod hole ap proximately 06 center Drill ball connector fit inside pushrod ap proximately 045 center Install connector Use 2-56 RC pushrod devises install adjustable pushrod end links elevator horn Use 020 minimum lead-outs pushrod exits forward stabilizer hooks has adjustable RC link horn mounted top elevator bellcrank Wrap ends tightly prevent snagging fuselage side allow outer eyes pass through adjustable lead-out guide Mount elevator horn top elevator flap linkages RC aileron links rigged exit bottom wing Cut link short install both wing solder glue oper ate unison Add clevis Use RC pushrod connect flap linkage ball link belicrank Finishing Youll probably want cover model heat-shrink materials case follow instructions included materials prototype covered Japanese tissue several reasons Its light easy use gives colorful taut attractive re sult Prime surfaces nitrate butyrate used Sig spray butyrate smooth fine-grade sandpaper Repeat process everything sealed sanded smooth cut tissue parts allowing overlapping Apply unthinned dope around perime ter parts covered Spray tis sue fine mist water adhere quickly before its soggy youve mistak enly selected wrapping paper rather 62 Model Aviation RC aileron linkage hooked up used actuate flaps internal reinforce ment shown removing material help bail link clear wing no problem removable wing allows good access controls fuel tank Flaps actuated via bail link cut-down 3in Perfect belicrank permitting easy removal installation wing Chinese CS engine recently introduced high-powered hA engines really bring model life CS operates best higher rpmhence biaded propeller Half 5 x 3 prop works well tuned pipe can used minipipe about 3 works well less sensitive tuned pipe conservative power setup Kustom Kraftsmanship Cox engine installed Fourmost mount turning 5 x 3 Cox propeller pressure backplate engine gives reliable performance fabulous Shuriken custom metal engine mount interchangeable Fourmost mount engine offers another magnitude power flying holds setting beginning end thinned-blade 5 x 3 prop ideal Full-Size Plans AvaIlable . See Page 180 ALLRJBS I/IR6ALSA FRJ7~MF KRO BATI/S CL SPORT-STUNT DESIGN ST WILLIAM J WINTER ENGINEERED AND DRAWN BY JOHN HUNTONNOV 90 CUT FROM 3/4 T K STOCK 4 ISHARDl/4S4 SM 3/4 STOCK LEBOX OThER TIP 3/16 DOWELNOTE ALL WOOD I/K GLUE TO FUSESPLIT CANOPY OVERLAP J7P 049 ENS i1Qj Japanese tissue youll know point paper will fall apart Lay tissue place pulling out noticeable wrinides Seal edges dope Cover both sides part youre working dry thoroughly spray clear dope added strength Spray brush parts clear butyrate use thinned dope brushing dope has dried completely sand everything fine paper sand through tissue touch up felt-tipped pen similar color Apply additional coats dope strength en seal surface Add AMA num ber decoration sure use strong hinges pin secure grip Canopy Trim canopy fit model Cut two attach front half front fuselage rear half wing Trim off enough rear canopy slip front part wing place glue canopy first front rear Rigging Developing good margin sta bility line tension depends several important factors B Rudder offset provides outward angle crab Ample rudder offset shown plan Line guide An adjustable line guide shown farther back lead-outs greater outward crab angle crab angle tauter lines Start plenty crab angle reduce maximum efficiency may need crab windy days Balance point Make sure model bal ances either center-of-gravity shown farther forward add ballast necessary Dont attempt fly tail-heavy airplane better control response move bal ance point rearward increments B Wing tip weight weight box pro vided Again start weight necessary say 1 oz reduce match conditions Seal box plastic tape Elevator deflection Maximum should 20 degrees Engines standard Cox TD 049 provides adequate power youll need pres sure fuel system complete reliability Dont use timed pressure port stock Cox cut off pressure teat get stock Cox requires minimum pressure backplate Kustom Kraftsman ship KK best combination complete remanufactured KK Cox pressure backplate 72-turn needle valve undrilled venturi Cox plug reliable choice Modified ones available Kustom Kraftsmanship added power April 1991 63 Continued page JSS Left Side view Akro Bat showing adlustabie lead-out guide prototype wee flown using third fifth holes front 1 14 oz wing tip weight outboard weight box line tension excellentalthough outer tip dipped little during square maneuvers Start 1 14 02 remove weight match conditions Right lead-out guide lets vary holes use first flights windy-day sessions run lead-outs toward rear wing calm days run farther forward Movies/Filippova Continued page 59 RC Junkers about 10 feet wing span weighed about 14 pounds equipped Russian 10cc Raduga ser ial engines engines modified course As know Soviet-made serial en gines usually arent highest quality Milcaelian exacting producer has vivid impressions memories war wanted movie capture told Konstantin Sergei fly Junkers theyd appear exactly remembered producers idea show two Junkers flying other divebombing trench Russian soldier stood guard models expected fly side side very close other youve flown RC models know hard Also since cameras couldnt move up pilots maintain specified trajectory Any little mistake flying directly trench would ruin take film showed So viet soldier guarding trench Explosives buried close trench detonated bombs hit ground Another problem sequence bombing precisely Mikaelian wished wanted planes dive down eject bombs regular intervals af ter other took lot experimenting changes models special control mechanism get right everything producer wanted Konstantin Sergei made 20 flights together before cameras rolled flew bombing scene over over producing hours worth film scene lasted minute finished movie shooting finishedor thought morning Mikaelian announced hed come up another ideahe wanted show bombing appeared soldier the trench So crew moved south again search summer time city Tashkent As Konstantin told later shooting Tashkent absolutely terrible experience him Sergei create effect Mi kaelian wanted two modelers stand side side cameraman throw bombs down themselves operator watch bombs hurtling down pre cisely six bombs about 10 inches long made metal reached speed 120 mph modelers cooperated bravely course nobody wanted killed stayed cam era threw bombs down precisely possible directly camera bombs landed extremely close probably about eight inches stood Fortunately nobody killed Mi kaelian satisfied scene filming over last collaboration movie project A Push-Rod Selection Leaves Up InTheAir Its true offer complete line push-rods world thats important reason choose Sullivan push-rods fact once its model doesnt matter other push-rods carry just want yours work best its will Sullivan push-rods designed built maximum strength flexibility dependability Theyre also light weiit well simply best Which means get widest choice Sullivan PRODUCTS push-rods get best choice P0 Box 5166 Baltimore MD 21224 Getting Better Ideas Off Ground brings something new interesting Konstantin Sergei Vitaliy last signment movie called Afghani stan Brake about recent war Afghan istan film jointly produced Lenfilm Italian company Vladimir Bartko producer modelers job build two So viet MI-8 Helicopters planes tended flying models blown up movie Yet construction duplicate full-scale MI-8 exactly both side out because producer wanted explosion look realistic possi ble fuselage length about 83 ft Helicopters fairly large As turned out oaly models needed blew up realistically other Helicopter left intact ready used future movie about SovietAfghanistan conflict could years away course Afghanistan war has become just bad dream What would movie industry out models modelers Konstantin Ser gei Vitaliy hope continue team work years come IZ Akro Bat/Hunton Continued page 63 Its critical use Cox fuel Cox en gines incompatible fuels used en gine will perform normally after start-up April 1991 155 p I I I I I I I I I I I I I I * U U U U I U U U U I U I U U U U U U U U U U U 510 GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTQUART GALLON 0% Nitroniitharte $995 5% Nitromethane $495$1195 100/0 Nitromettart $95$535$1395 150/0 NllrQmethan $R25$1595 25% NitrolohaJ* $495$795$2095 350/0 NitromeThane $595 $895 $2595 SIG PREMIUM 4-STROKE FUEL 100/0 Nitromethane$1325 150/o Nitromethane$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure ye paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPOsaS subject tu uheeg notice See dealer first available order direct Call 1J 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 U U E UEUUUUUUU AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300 BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In Computer Designed 3 Axis Control Part 1 03 Ultralight0Easy Construction Wood Construction TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 start behaving setting wrong Use Cox racing fuel its available try Tower Hobbies Also use 5 x 3 Cox propeller recently introduced Shuriken brings new dimension performance 1 /2A en gines Shuriken considerably out-turns Cox remarkably durable Unlike Cox will go over hill gets little lean probably metallurgical rea sons little ABC jewel will run run Shuriken will fit modified Fourmost mount Use smallest venturi option available Cox 5 x 3 prop works fine engine designed operate around 30000 rpm thinned-blade 5 x 3 works better state-of-the-art 1/2A engine can ordered BV Com petition Engines 1163 Country Club Rd. Indianapolis IN 46234 third engine option Chinese CS Heavier Cox Shuriken CS develops optimal power higher rpm cut-down Cox 5 x 3 prop perhaps 4in diameter required pressure backplate CS now available United States Use sport version unless want fool tuned pipe Flying 2-oz fuel tank shown will sus tain long flights youre new flying use half-filled tank begin Position model will break ground downwind side circle Keep low un til youve built up enough speed cer tain engine wont sag Correct ten dency bank out Check wings remain level inverted flight Once model fully trimmed youre ready begin maneuvers Try AMA Precision Aerobatics routine Its good way have fun honing flying skillsEl CL Aerobatics/McMiIIan Continued page 64 focus need place proper relation ship overall length wing get size appropriate other parts plane Note again trying get everything same scale Rather goal get shapes relationships correct within bounds set early good moments Rscogn aed Cats fed Aedeasne PeNs___ FeNoeLi Pow E26225ff25 54fec Only cetified checks money odes accepted Minimum ode $1400 thee packages 4 Pomerpoles $400 pe package 0200 Shipping handling CT esidents add sales tan Prines subject change withoot notice DEALER INQUIRIES INVITED further intomarion dealet prices send SASS end Susiness Card SERMOS R/C SNAP CONNECTOR8 Inc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 156 Model Aviation
Edition: Model Aviation - 1991/04
Page Numbers: 60, 61, 62, 63, 155, 156
A sleek little Sport Stunt model takes CL Aerobatics new heights performance Its great way try out latest best engines Design Bill Winter Text John Hunton DESIGNED take advantage new est best engines Control Line Sport Stunter flies well its good looks suggest less maximal still adequate performance Akro Bat Jr can also flown Kustom Krafts manship Cox engine Bill Winter have updated two Bills classic RC designs during past few years RC Special published Model Aviation March April 1990 Cloud Niner revision Krackerjac will appear RC Modeler Cloud Niner extended flight enve lope low velocity end using flap erons split flaps decided carry idea further next project stretching performance envelope high-velocity end keeping lowend gains other words new model should have exceptionally wide perform ance capability Collaborating Bill has reward ing Hes thoughtful man superb de sign talent everything turns out has magic touch latest project no time Bill produced sketches short-coupled shoulder-wing model distinctive lines proportions trademark test design volun teered execute /2A RC version drawing board found myself visualiz ing Control Line Sport Stunt model stead Bills response sug gested scaling down empennage lengthening nose Otherwise lines re mained same dubbed model Akro Bat Jr models took first place last years Northern Virginia Control Line /2A Stunt contest aesthetically its sort blah couldnt imagine people wanting build Akro Bat could would look good 3D did paper would fly Two weeks later answer little model makes high-performance hA CL flight reality Equipped maneu vering flaps tight squares Akro Bat does allinside loops outside loops 60 Model Aviation Above Ciean good looks spectacuiar aerobatics capabiiity halimarks Blii Winters designs CL Sport Stunter great practicing AMA pattern Modei covered Japanese tissue biack trim vinyi stick-on iettering 9elow Overhead view showing rhythm ribs pieasing ilnes needie-pointed nose singie screw hoids wing stress taken dowel runs front wing plywood key former canopy attached two parts joint overiapped Sporting winter beard Austraiian hat author gives scaie diminutive CL Sport Stunter Biii originaiiy designed airpiane 40 RC iooked good author suggested 1/aA CL rendition first hat After years fiylng modeis sun sun iooks back squared loops verticalsand looks good doing Bill really pushed back per formance margins Fly Kustom Kraftsmanship Cox engine has plenty reliable power set up noted later go full performance potent new Shuriken Chinese-made CS engines zoom through sky fast its scary Tests run 35-ft 012 braided lines longer ones will needed fly full Stunt Shuriken addition providing goad engine ac cessibility Fourmost engine mount adds streamlining simplifies construc tion removable wing borrowed RC technology gives easy accessibility controls fuel system model combines full pattern capabil ity compactness economy adjustable line tension features smooth positive controls make excel lent choice beginners Construction Akro Bat Jr unusually easy build two reasons First accu rate fuselage alignment automatic once youve installed plywood key former landing gear mounting plate Sec ond because top spar flat like bottom continuous wing built flat workbench rather air Fuselage Cut sides medium balsa taking care cut key former slots accurately sure make both right side left Cut doublers medi um-soft wood formers relatively firm stock Cut out plywood parts Install doublers longerons fuselage side Slip glue key former position install landing gear mounting plate fuselage now accu rate alignment Hint Strengthen criti cal joints sprinlding baking soda soaking CyA cyanoacry late glue complete structural assembly glue sides together rear install front balsa former Install remaining formers interior parts Block sand fuselage flat top bottom add front rear top bottom sheet ing Carve block sand nose quarter panels conform front former stall quarter panel sheets Flatten nose accurately sanding block insert blind nuts install front plywood fire wall Finish sand fuselage Before install ing empennage drop tail skid rear panel sprinide baking soda apply CyA wing built topside down Lay plan flat board full length wingspan cover waxed paper Use firm balsa spars top bottom spars continuous tip tip Pin top spar flat building board letting extend second panel April 1991 61 ne mapr miruciura componenia gi iuu.ug una ian tuna sides preassembled longerons Buiiding strong lightweight tail easier man looks installing key former landing gear mounting plate brings fuselage accurate alignment Pulling tall halves together removes twist Assembly simple can done off board author strengthens important joints sprinkling baking soda make small fillet soaking thin CyA cyanoacryiste glue Cidee-up wing before covering Both top bottom spars continuous tip tIp Since upper spar also fiat wing built fiat board air will built first panel com plete remove plan spray WD-40 make transparent Reverse plan build second panel over Add top spar doubler Cut out po sition ribs Slip support member onto plan support align ribs shown glue spar Because lines controls exter nal wing assembly easier Stunt models wing can com pletely assembled finish sanded before cutting flaps loose Cut trailing edge parts length Notch glue trailing edge ribs Install partial bottom spar bottom spar Glue flap spars flap leading edges add remaining flap rib parts Trim leading edge proper depth install Add half ribs tip parts Sheet wing assembly Install out board wing tip weight box Trim lead ing edge knife shape carefully symmetrically Smooth wing long flat sanding block Cut flaps loose provide least A2 minimum clearance end Empennage tail designed strength light weight assembly less difficult looks Cut cores soft balsa edge firm balsa Block sand tail flat Round leading edges taper trailing edges desired Final assembly Install engine mount landing gear fuselage Fit wing fuselage taking care form neat tight joint Its good idea mark wing leading edge plywood hole firewall accurate drilling After cov ering tail surfaces ftiselage re moving covering jointing occurs mount tail wing place check its properly aligned wing Controls Cut down Perfect 3-in bellcrank access inner holes approx imately 23-in lead-out spacing Youll also using inner pushrod hole ap proximately 06 center Drill ball connector fit inside pushrod ap proximately 045 center Install connector Use 2-56 RC pushrod devises install adjustable pushrod end links elevator horn Use 020 minimum lead-outs pushrod exits forward stabilizer hooks has adjustable RC link horn mounted top elevator bellcrank Wrap ends tightly prevent snagging fuselage side allow outer eyes pass through adjustable lead-out guide Mount elevator horn top elevator flap linkages RC aileron links rigged exit bottom wing Cut link short install both wing solder glue oper ate unison Add clevis Use RC pushrod connect flap linkage ball link belicrank Finishing Youll probably want cover model heat-shrink materials case follow instructions included materials prototype covered Japanese tissue several reasons Its light easy use gives colorful taut attractive re sult Prime surfaces nitrate butyrate used Sig spray butyrate smooth fine-grade sandpaper Repeat process everything sealed sanded smooth cut tissue parts allowing overlapping Apply unthinned dope around perime ter parts covered Spray tis sue fine mist water adhere quickly before its soggy youve mistak enly selected wrapping paper rather 62 Model Aviation RC aileron linkage hooked up used actuate flaps internal reinforce ment shown removing material help bail link clear wing no problem removable wing allows good access controls fuel tank Flaps actuated via bail link cut-down 3in Perfect belicrank permitting easy removal installation wing Chinese CS engine recently introduced high-powered hA engines really bring model life CS operates best higher rpmhence biaded propeller Half 5 x 3 prop works well tuned pipe can used minipipe about 3 works well less sensitive tuned pipe conservative power setup Kustom Kraftsmanship Cox engine installed Fourmost mount turning 5 x 3 Cox propeller pressure backplate engine gives reliable performance fabulous Shuriken custom metal engine mount interchangeable Fourmost mount engine offers another magnitude power flying holds setting beginning end thinned-blade 5 x 3 prop ideal Full-Size Plans AvaIlable . See Page 180 ALLRJBS I/IR6ALSA FRJ7~MF KRO BATI/S CL SPORT-STUNT DESIGN ST WILLIAM J WINTER ENGINEERED AND DRAWN BY JOHN HUNTONNOV 90 CUT FROM 3/4 T K STOCK 4 ISHARDl/4S4 SM 3/4 STOCK LEBOX OThER TIP 3/16 DOWELNOTE ALL WOOD I/K GLUE TO FUSESPLIT CANOPY OVERLAP J7P 049 ENS i1Qj Japanese tissue youll know point paper will fall apart Lay tissue place pulling out noticeable wrinides Seal edges dope Cover both sides part youre working dry thoroughly spray clear dope added strength Spray brush parts clear butyrate use thinned dope brushing dope has dried completely sand everything fine paper sand through tissue touch up felt-tipped pen similar color Apply additional coats dope strength en seal surface Add AMA num ber decoration sure use strong hinges pin secure grip Canopy Trim canopy fit model Cut two attach front half front fuselage rear half wing Trim off enough rear canopy slip front part wing place glue canopy first front rear Rigging Developing good margin sta bility line tension depends several important factors B Rudder offset provides outward angle crab Ample rudder offset shown plan Line guide An adjustable line guide shown farther back lead-outs greater outward crab angle crab angle tauter lines Start plenty crab angle reduce maximum efficiency may need crab windy days Balance point Make sure model bal ances either center-of-gravity shown farther forward add ballast necessary Dont attempt fly tail-heavy airplane better control response move bal ance point rearward increments B Wing tip weight weight box pro vided Again start weight necessary say 1 oz reduce match conditions Seal box plastic tape Elevator deflection Maximum should 20 degrees Engines standard Cox TD 049 provides adequate power youll need pres sure fuel system complete reliability Dont use timed pressure port stock Cox cut off pressure teat get stock Cox requires minimum pressure backplate Kustom Kraftsman ship KK best combination complete remanufactured KK Cox pressure backplate 72-turn needle valve undrilled venturi Cox plug reliable choice Modified ones available Kustom Kraftsmanship added power April 1991 63 Continued page JSS Left Side view Akro Bat showing adlustabie lead-out guide prototype wee flown using third fifth holes front 1 14 oz wing tip weight outboard weight box line tension excellentalthough outer tip dipped little during square maneuvers Start 1 14 02 remove weight match conditions Right lead-out guide lets vary holes use first flights windy-day sessions run lead-outs toward rear wing calm days run farther forward Movies/Filippova Continued page 59 RC Junkers about 10 feet wing span weighed about 14 pounds equipped Russian 10cc Raduga ser ial engines engines modified course As know Soviet-made serial en gines usually arent highest quality Milcaelian exacting producer has vivid impressions memories war wanted movie capture told Konstantin Sergei fly Junkers theyd appear exactly remembered producers idea show two Junkers flying other divebombing trench Russian soldier stood guard models expected fly side side very close other youve flown RC models know hard Also since cameras couldnt move up pilots maintain specified trajectory Any little mistake flying directly trench would ruin take film showed So viet soldier guarding trench Explosives buried close trench detonated bombs hit ground Another problem sequence bombing precisely Mikaelian wished wanted planes dive down eject bombs regular intervals af ter other took lot experimenting changes models special control mechanism get right everything producer wanted Konstantin Sergei made 20 flights together before cameras rolled flew bombing scene over over producing hours worth film scene lasted minute finished movie shooting finishedor thought morning Mikaelian announced hed come up another ideahe wanted show bombing appeared soldier the trench So crew moved south again search summer time city Tashkent As Konstantin told later shooting Tashkent absolutely terrible experience him Sergei create effect Mi kaelian wanted two modelers stand side side cameraman throw bombs down themselves operator watch bombs hurtling down pre cisely six bombs about 10 inches long made metal reached speed 120 mph modelers cooperated bravely course nobody wanted killed stayed cam era threw bombs down precisely possible directly camera bombs landed extremely close probably about eight inches stood Fortunately nobody killed Mi kaelian satisfied scene filming over last collaboration movie project A Push-Rod Selection Leaves Up InTheAir Its true offer complete line push-rods world thats important reason choose Sullivan push-rods fact once its model doesnt matter other push-rods carry just want yours work best its will Sullivan push-rods designed built maximum strength flexibility dependability Theyre also light weiit well simply best Which means get widest choice Sullivan PRODUCTS push-rods get best choice P0 Box 5166 Baltimore MD 21224 Getting Better Ideas Off Ground brings something new interesting Konstantin Sergei Vitaliy last signment movie called Afghani stan Brake about recent war Afghan istan film jointly produced Lenfilm Italian company Vladimir Bartko producer modelers job build two So viet MI-8 Helicopters planes tended flying models blown up movie Yet construction duplicate full-scale MI-8 exactly both side out because producer wanted explosion look realistic possi ble fuselage length about 83 ft Helicopters fairly large As turned out oaly models needed blew up realistically other Helicopter left intact ready used future movie about SovietAfghanistan conflict could years away course Afghanistan war has become just bad dream What would movie industry out models modelers Konstantin Ser gei Vitaliy hope continue team work years come IZ Akro Bat/Hunton Continued page 63 Its critical use Cox fuel Cox en gines incompatible fuels used en gine will perform normally after start-up April 1991 155 p I I I I I I I I I I I I I I * U U U U I U U U U I U I U U U U U U U U U U U 510 GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTQUART GALLON 0% Nitroniitharte $995 5% Nitromethane $495$1195 100/0 Nitromettart $95$535$1395 150/0 NllrQmethan $R25$1595 25% NitrolohaJ* $495$795$2095 350/0 NitromeThane $595 $895 $2595 SIG PREMIUM 4-STROKE FUEL 100/0 Nitromethane$1325 150/o Nitromethane$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure ye paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPOsaS subject tu uheeg notice See dealer first available order direct Call 1J 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 U U E UEUUUUUUU AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300 BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In Computer Designed 3 Axis Control Part 1 03 Ultralight0Easy Construction Wood Construction TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 start behaving setting wrong Use Cox racing fuel its available try Tower Hobbies Also use 5 x 3 Cox propeller recently introduced Shuriken brings new dimension performance 1 /2A en gines Shuriken considerably out-turns Cox remarkably durable Unlike Cox will go over hill gets little lean probably metallurgical rea sons little ABC jewel will run run Shuriken will fit modified Fourmost mount Use smallest venturi option available Cox 5 x 3 prop works fine engine designed operate around 30000 rpm thinned-blade 5 x 3 works better state-of-the-art 1/2A engine can ordered BV Com petition Engines 1163 Country Club Rd. Indianapolis IN 46234 third engine option Chinese CS Heavier Cox Shuriken CS develops optimal power higher rpm cut-down Cox 5 x 3 prop perhaps 4in diameter required pressure backplate CS now available United States Use sport version unless want fool tuned pipe Flying 2-oz fuel tank shown will sus tain long flights youre new flying use half-filled tank begin Position model will break ground downwind side circle Keep low un til youve built up enough speed cer tain engine wont sag Correct ten dency bank out Check wings remain level inverted flight Once model fully trimmed youre ready begin maneuvers Try AMA Precision Aerobatics routine Its good way have fun honing flying skillsEl CL Aerobatics/McMiIIan Continued page 64 focus need place proper relation ship overall length wing get size appropriate other parts plane Note again trying get everything same scale Rather goal get shapes relationships correct within bounds set early good moments Rscogn aed Cats fed Aedeasne PeNs___ FeNoeLi Pow E26225ff25 54fec Only cetified checks money odes accepted Minimum ode $1400 thee packages 4 Pomerpoles $400 pe package 0200 Shipping handling CT esidents add sales tan Prines subject change withoot notice DEALER INQUIRIES INVITED further intomarion dealet prices send SASS end Susiness Card SERMOS R/C SNAP CONNECTOR8 Inc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 156 Model Aviation