PROPER fuel tank construction several occa sions Racing enthusiasts have requested specifi cations foolproof fuel tank construction se quence races and/or good engines have lost result tank leak both Scale Rat Racers use stan dard cylindrical Rat tank cut down three ounces Scale four ounces Rat During construction tank manufac turer uses standard acid core solder flux Us ing torch medium heat remove rear front cover tank will find minor cor rosion residual flux inside tank remove tubes clean entire unit Ivory liq uid soap steel wool After methanol wash resolder joints tubes Sta-Brite silver solder using companion Sta-Brite liquid flux Sta-Brite has enough silver content produce excellent noncorrosive bond ductile enough take constant vibration hard landings leaking After reassembling tank just before seal ing rear tank freeze-out plug again wash unit cut down size tank rear cylindrical cover will too large because diameter tank tapers various sizes freeze-out plugs local auto parts store can used rear cap stoutness plug also strengthens rear area tank tank clean surround Perm A-Gasket blue silicone adhesive nature material permanent fuel-proof flexi bility make light secure mounting inside Rat pan vibration damper profiletype racer conclusion racing day spray small amount WD-40 tank neutral ize acid nature typical racing brew scratch-built tank required make sure have overlapping flap solder seam support flap omitted manufacture right-angle mandrel trim size out support flaps tank will stress tually crack carrying full load fuel during hard landing Flying wire construction Recently witnessed several control line failures during racing heats Careful inspection after fact showed propen sity failure three types seem ingly minor construction variations shown AMA rule book present first variation involves size wrap ping wire used secure line ends Fine cop per wire occasionally hard find Modelers will use standard copper wire pack aged spool too t zk proper wrap ping can bind han up used internal line attachments second type variation occurs during con struction line end loops loop wire used around spindle Two loops specified AMA rule book 018 015 flying wires being constructed tight double loop over spindle difficult individual does make up set lines very often third variation involves failure wrap wire carefully up spindle failures observed revealed wrapping car ried close enough spindle resulting flexing ultimate breaking wire Strict adherence diagrams instruc tions given AMA rule book will minimize ruining aircraft expensive engines mention eliminating danger fellow compet itors spectators Flying techniques recent meet Whittier Narrows CA drew excellent number en trants Control Line Racing events includ ing Mouse Mouse II Scale Racing Slow Rat Fast Rat Team Race month am enclosing picture John McCollum hat flying against Steve Ei chenberger Scale Racing John using block ing technique keep Steve backside pilots circle As can see Steve leaning John attempt negate advantage both pilots try occupy small center flying circle Notice six-foot landing stripe Out beyond center circle important have landing stripe marked aid pilot acti vates fuel shutoff lines plane up pitman uses line reference plane inside outside racing circle situation might result missed catch damaged aircraft Gllroy Model Club Gilroy CA has sent photograph contest held benefit Veterans Hospital Palo Alto CA pho tographs show Ernie Reece pitting WAM Wes tern Associated ModelersEd Sport Racer short grassy area Note fuel bottle has set far away plane Should alco hol fire occur plane being started fuel bottle will well out harms way Electrical connections During 89 Nats several situations electrical connection failures neutralized competitors ability win place event especially true Jerry Myers Slow Rat pitman electrical connection failure glow plug Continued page 174 84 Model Aviation Confrol Line Racing John Ballard 10102 Klmblewlck Dr Louisville KY 40223 Flying technique Seen Scale Racing Whittier Narrows CA match between John McCollum hat Steve Eichen berger John blocking Steve cen ter pilots circle Steve leaning him try regain lost advantage Ernie Reece seen pitting during WAM West ern Sport Race Veterans Hospital air show Palo Alto CA Note fuel bottle well away planea good safety measure case alcohol fire starts under plane engine being started y Dziak showing Bob Dalton con nection wire between finger contact glow plug plane Proper selection wire glow plug connector will mini mize electrical failuresand maximize potential have winning heatl Jim Ricketta fires up Slow Rat recent contest Ballard says its important have relatively long battery leads can run underneath wing help keep glow plug clip snagging wing release causing bad launch SOFT MOUNT THE EASY WAY WITH VIBRA-DAMPTM B EALIVIIS patent pending use up 60 in3 2cycles Laboratory tested contest proven 21 50 plus $175 shipping Mich residents add tax ALL HARDWARE INCLUDED UNIVERSAL engine isolation mounting system PERFORMANCE PRODUCTS NLIMITEJ 7093 E Dodge Rd Mt Morris MI 48458313 631-4894 Eon DETAILS & BROCHURE OF OTHER HIGH TECH PRODUCTS SEND $1 00 CL Combat/Johnson Continued page 83 Weldhond sealing around engine mounts covering dont want fuel seeping under covering melting foam model lasts longer test flight first match Spraying little epoxy works too doesnt melt foam clear dope would Flecto Varathane another product works fuel-proof wood joints suspect doesnt work well Weldbond high-tech models old Orbit Ace Reactor cup tea Barry Baxter has plans build dream ship Send SASE product list Barry Baxter 6490 Sonora Way Cypress CA 90630or call him 714 761-0672 Barry has big promoter 80mph Combat Nostalgia events southern California Using model looked like Clingon Warrior Starship got four five con secutive kills last Money Nate Los An geles Lets talk about beflcranks nownot midair kind kind use control model few years ago trend toward very slow controls using large bellcranks control handles close line spacing Remember ratio between distance pivot pushrod hole bellerank length elevator horn used determine much elevator travel youll have ideal situa tion Combat model have pushrod close pivot point bellerank can use fairly short elevator horn No use having lot throw bellerank necessitat ing giant elevator horn may break get knocked off crash *MPDEU reels ca Through trial error youll find out much elevator deflection model needs turn tight stalling slowing too much Warning Some models slow down give too much control also come sailing across circle Once get proper amount Up/Down other tuning choice have unless model has external bellerank using differ ent line spacing handle Some people can fly slow controls because arms jointed like orangutans lot fly ing day find arm getting tired may youre putting too much movement flying ratio between bellerank elevator horn can termed correct lets plane turn its tightest stalling guys like lit tle extra control available situations youd rather slow plane turn avoid hitting ground no correct way far amount handle movement concerned guys proper ratio style may look smooth another person same model may look awkward additional warning using handle locking nut top Its gonna snag opponents lines days youll thrill Oh what feeling Doe Passen reports Performance Model Parts Inc 12233 South 1565 East Draper UT 84020 place write own Cipolla unfortunately made illegal 4mm venturi rule FAt also pro hibits subport induction Glen Dye offering new longer-skirt piston several head/plug combinations too may also call Glen 801 571-7017 find out prices Doe reports theyre reasonable LARRY JOLLY KITS Now Stock Pantera 100 span Great Contesl Plane11995 Cheetah 112 span Aileron Contest Plane16495 Meteor 128 span Open Class Contest Plane13995 Flinger 59 Span great hand launch plane3495 CA Res add 7% Tax $395 S&H s3nD youd better get engine him before gets tired doing Doc Passen also has new Combat design called Crocodile-Doc-EF supposed snap tail off have some views AMA Combat rules might write John Salvin chairman Combat Advisory Committee address 17 Jewel Ct Orinda CA 94563 CL Racing/Ballard Continued page 84 resulted very long pit stop re sulted Jerry being eliminated competi tion Jerrys engine airplane near top speed during qualification sta ble battery connection contact points failure can easily occur Such failures usually originate wire go ing glow plug profile-style racers have much vibration easy wire fatigue crack/breakor connection comes loose glow plug have found best type wire use vinyl-coated copper dont use solid wire pre ferring stranded type having least 20 strands covered vinyl coating least A2 thick stranded copper wire will withstand much vibration before fatigues breaks Experience has shown glow plug connec tors sometimes fashioned piece 031 music wire bent acts spring clip over attachment point glow plug scheme shows propensity solder joint stress wire break wire joins clip have found small brass alligator clip best form attachment though somewhat clumsy spring-loaded alligator clip keeps good tension glow plug post will take tremendous amount vibration before fatiguing addition alligator clip easily removed plug needs changing music wire clip much harder release glow plug Finally Larry Dziak showed method minimize failure solder joint wire alligator clip slides piece smalldiameter silicone tubing over area around alligator clip wire absorbs some vibration minimizes chances break age point other end wire leading glow plug soldered finger contact plane turn finger contact designed wire glow plug soldered rear 174 Model Aviation NEW SPACE SAVING CONTAINER Faa boa 2-112x7-31ex9-lie Tough Rigid Polyettiylene udesall tubing erriers lock tubing through cap ostage North Products PO Box 18419- Cleveland Heights OH 44118 Gal Iiiqhi LiNE SYSTEMSI WE BUILD YOUR HELl TEST YOUR HELl \\REPAIRYOURHELI 2 North 7th St 613 ~i1 LehightonPo18235 WRITE OR CALL FOR INFORMATION PO Box 1502 Lewiston ME 04241 12 VOLT WINCHES WITH BRAKE 1 207 784-27361 pad ia screwed plane wire will securely pressed between pad fuselage minimize wire failure point Help needed 89 Nats received letter Bob Dalton Wayne Foster requesting sistance during years Nats Richland WA year Nats manpower requirement CL Racing extensive Bob has asked anyone can provide timing modelprocessing assistance please drop him note 1455 South Peacehaven Rd Clemmons NC 27012 As always solicit comments photos share readers Whistle/Tierney Continued page 92 stored eight-bit bytes inter nal registers processor pur poses entire string bits can consid ered 48-bit word processor contin uously scans switches compares new input switch state previously stored its memory Any change switch state will stored 31M evaluation will begin bell set task begins processor applies mask containing possible triplets could occur bit pattern mask simplified terms oriented according bit position triplets mask recognize bit 1 part triplet method requires some time during evaluation process bit must first accomplish entire bit pattern shifted bit position mask reapplied process continued until 46 48 bits have shifted bit #1 position remaining two shifts performed since two bits cant constitute triplet no match found bell turned off scanning continues Complicated time-consum ing sounds execution process times duration beep heard pin removed replaced however match found bell re mains program returns switch scanning Since change state switch contact what triggers evalua tion process replacement of offending pins will result no-match eval uation turning bell off Construction Since full-size circuit board pattern approximately 86 41 beyond scope article publish etching drilling guide light fact have made arrangements local company provide partial kits completely assembled tested con trollers company actually stu dent coalition son mem ber will anything mow grass custom fabricating electronic cir cuit boards little help dad have built couple Eagle 63s pricing has established follows MUM EKE U BUUEEU SIG 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 PINT QUART GALLON 0% Nitromethane$1075 5% Nitromethane$365$525$1275 10% Nitromethane$415$550$1475 15% Nitromethane$430$635$1675 25% Nitromethane$515$795$2195 35% Nitromethane$595$925$2695 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1425 15% Nitromethane$1625 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 youve 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 yourselfPrices sobjoct change withoot notice See dealer first available order direct Call IJ 800-247-5008 toll free orders Latest Catalog $300 MANUFACTURING CO Montezuma IA 50171 2X photo-ready etching drilling guide $500 Custom-programmed EPROM$1250 Etched drilled printed circuit board plated-through holes$2500 Assembled tested controller board $10000 address SJB Custom Attn Jason Tierney 9788 Ralph Road Whitesville KY 42378 sure specify interested RC Pinboard Controller project bit costly earlier model hope its simplicity versatility can indeed write final chapter third-order intermod monitoring flying field Happy Flying Sea Dart/Gilgenbach Continued page 100 fan intake exhaust primarily concerned about maximizing static thrust taking off water Since top speed full-size Sea Dart 670 mph 1/9-scale model wouldnt have go over 100 mph give good scale effect Tom also recommended build model light possible achieve takeoff July 1989 175
Edition: Model Aviation - 1989/07
Page Numbers: 84, 174, 175
PROPER fuel tank construction several occa sions Racing enthusiasts have requested specifi cations foolproof fuel tank construction se quence races and/or good engines have lost result tank leak both Scale Rat Racers use stan dard cylindrical Rat tank cut down three ounces Scale four ounces Rat During construction tank manufac turer uses standard acid core solder flux Us ing torch medium heat remove rear front cover tank will find minor cor rosion residual flux inside tank remove tubes clean entire unit Ivory liq uid soap steel wool After methanol wash resolder joints tubes Sta-Brite silver solder using companion Sta-Brite liquid flux Sta-Brite has enough silver content produce excellent noncorrosive bond ductile enough take constant vibration hard landings leaking After reassembling tank just before seal ing rear tank freeze-out plug again wash unit cut down size tank rear cylindrical cover will too large because diameter tank tapers various sizes freeze-out plugs local auto parts store can used rear cap stoutness plug also strengthens rear area tank tank clean surround Perm A-Gasket blue silicone adhesive nature material permanent fuel-proof flexi bility make light secure mounting inside Rat pan vibration damper profiletype racer conclusion racing day spray small amount WD-40 tank neutral ize acid nature typical racing brew scratch-built tank required make sure have overlapping flap solder seam support flap omitted manufacture right-angle mandrel trim size out support flaps tank will stress tually crack carrying full load fuel during hard landing Flying wire construction Recently witnessed several control line failures during racing heats Careful inspection after fact showed propen sity failure three types seem ingly minor construction variations shown AMA rule book present first variation involves size wrap ping wire used secure line ends Fine cop per wire occasionally hard find Modelers will use standard copper wire pack aged spool too t zk proper wrap ping can bind han up used internal line attachments second type variation occurs during con struction line end loops loop wire used around spindle Two loops specified AMA rule book 018 015 flying wires being constructed tight double loop over spindle difficult individual does make up set lines very often third variation involves failure wrap wire carefully up spindle failures observed revealed wrapping car ried close enough spindle resulting flexing ultimate breaking wire Strict adherence diagrams instruc tions given AMA rule book will minimize ruining aircraft expensive engines mention eliminating danger fellow compet itors spectators Flying techniques recent meet Whittier Narrows CA drew excellent number en trants Control Line Racing events includ ing Mouse Mouse II Scale Racing Slow Rat Fast Rat Team Race month am enclosing picture John McCollum hat flying against Steve Ei chenberger Scale Racing John using block ing technique keep Steve backside pilots circle As can see Steve leaning John attempt negate advantage both pilots try occupy small center flying circle Notice six-foot landing stripe Out beyond center circle important have landing stripe marked aid pilot acti vates fuel shutoff lines plane up pitman uses line reference plane inside outside racing circle situation might result missed catch damaged aircraft Gllroy Model Club Gilroy CA has sent photograph contest held benefit Veterans Hospital Palo Alto CA pho tographs show Ernie Reece pitting WAM Wes tern Associated ModelersEd Sport Racer short grassy area Note fuel bottle has set far away plane Should alco hol fire occur plane being started fuel bottle will well out harms way Electrical connections During 89 Nats several situations electrical connection failures neutralized competitors ability win place event especially true Jerry Myers Slow Rat pitman electrical connection failure glow plug Continued page 174 84 Model Aviation Confrol Line Racing John Ballard 10102 Klmblewlck Dr Louisville KY 40223 Flying technique Seen Scale Racing Whittier Narrows CA match between John McCollum hat Steve Eichen berger John blocking Steve cen ter pilots circle Steve leaning him try regain lost advantage Ernie Reece seen pitting during WAM West ern Sport Race Veterans Hospital air show Palo Alto CA Note fuel bottle well away planea good safety measure case alcohol fire starts under plane engine being started y Dziak showing Bob Dalton con nection wire between finger contact glow plug plane Proper selection wire glow plug connector will mini mize electrical failuresand maximize potential have winning heatl Jim Ricketta fires up Slow Rat recent contest Ballard says its important have relatively long battery leads can run underneath wing help keep glow plug clip snagging wing release causing bad launch SOFT MOUNT THE EASY WAY WITH VIBRA-DAMPTM B EALIVIIS patent pending use up 60 in3 2cycles Laboratory tested contest proven 21 50 plus $175 shipping Mich residents add tax ALL HARDWARE INCLUDED UNIVERSAL engine isolation mounting system PERFORMANCE PRODUCTS NLIMITEJ 7093 E Dodge Rd Mt Morris MI 48458313 631-4894 Eon DETAILS & BROCHURE OF OTHER HIGH TECH PRODUCTS SEND $1 00 CL Combat/Johnson Continued page 83 Weldhond sealing around engine mounts covering dont want fuel seeping under covering melting foam model lasts longer test flight first match Spraying little epoxy works too doesnt melt foam clear dope would Flecto Varathane another product works fuel-proof wood joints suspect doesnt work well Weldbond high-tech models old Orbit Ace Reactor cup tea Barry Baxter has plans build dream ship Send SASE product list Barry Baxter 6490 Sonora Way Cypress CA 90630or call him 714 761-0672 Barry has big promoter 80mph Combat Nostalgia events southern California Using model looked like Clingon Warrior Starship got four five con secutive kills last Money Nate Los An geles Lets talk about beflcranks nownot midair kind kind use control model few years ago trend toward very slow controls using large bellcranks control handles close line spacing Remember ratio between distance pivot pushrod hole bellerank length elevator horn used determine much elevator travel youll have ideal situa tion Combat model have pushrod close pivot point bellerank can use fairly short elevator horn No use having lot throw bellerank necessitat ing giant elevator horn may break get knocked off crash *MPDEU reels ca Through trial error youll find out much elevator deflection model needs turn tight stalling slowing too much Warning Some models slow down give too much control also come sailing across circle Once get proper amount Up/Down other tuning choice have unless model has external bellerank using differ ent line spacing handle Some people can fly slow controls because arms jointed like orangutans lot fly ing day find arm getting tired may youre putting too much movement flying ratio between bellerank elevator horn can termed correct lets plane turn its tightest stalling guys like lit tle extra control available situations youd rather slow plane turn avoid hitting ground no correct way far amount handle movement concerned guys proper ratio style may look smooth another person same model may look awkward additional warning using handle locking nut top Its gonna snag opponents lines days youll thrill Oh what feeling Doe Passen reports Performance Model Parts Inc 12233 South 1565 East Draper UT 84020 place write own Cipolla unfortunately made illegal 4mm venturi rule FAt also pro hibits subport induction Glen Dye offering new longer-skirt piston several head/plug combinations too may also call Glen 801 571-7017 find out prices Doe reports theyre reasonable LARRY JOLLY KITS Now Stock Pantera 100 span Great Contesl Plane11995 Cheetah 112 span Aileron Contest Plane16495 Meteor 128 span Open Class Contest Plane13995 Flinger 59 Span great hand launch plane3495 CA Res add 7% Tax $395 S&H s3nD youd better get engine him before gets tired doing Doc Passen also has new Combat design called Crocodile-Doc-EF supposed snap tail off have some views AMA Combat rules might write John Salvin chairman Combat Advisory Committee address 17 Jewel Ct Orinda CA 94563 CL Racing/Ballard Continued page 84 resulted very long pit stop re sulted Jerry being eliminated competi tion Jerrys engine airplane near top speed during qualification sta ble battery connection contact points failure can easily occur Such failures usually originate wire go ing glow plug profile-style racers have much vibration easy wire fatigue crack/breakor connection comes loose glow plug have found best type wire use vinyl-coated copper dont use solid wire pre ferring stranded type having least 20 strands covered vinyl coating least A2 thick stranded copper wire will withstand much vibration before fatigues breaks Experience has shown glow plug connec tors sometimes fashioned piece 031 music wire bent acts spring clip over attachment point glow plug scheme shows propensity solder joint stress wire break wire joins clip have found small brass alligator clip best form attachment though somewhat clumsy spring-loaded alligator clip keeps good tension glow plug post will take tremendous amount vibration before fatiguing addition alligator clip easily removed plug needs changing music wire clip much harder release glow plug Finally Larry Dziak showed method minimize failure solder joint wire alligator clip slides piece smalldiameter silicone tubing over area around alligator clip wire absorbs some vibration minimizes chances break age point other end wire leading glow plug soldered finger contact plane turn finger contact designed wire glow plug soldered rear 174 Model Aviation NEW SPACE SAVING CONTAINER Faa boa 2-112x7-31ex9-lie Tough Rigid Polyettiylene udesall tubing erriers lock tubing through cap ostage North Products PO Box 18419- Cleveland Heights OH 44118 Gal Iiiqhi LiNE SYSTEMSI WE BUILD YOUR HELl TEST YOUR HELl \\REPAIRYOURHELI 2 North 7th St 613 ~i1 LehightonPo18235 WRITE OR CALL FOR INFORMATION PO Box 1502 Lewiston ME 04241 12 VOLT WINCHES WITH BRAKE 1 207 784-27361 pad ia screwed plane wire will securely pressed between pad fuselage minimize wire failure point Help needed 89 Nats received letter Bob Dalton Wayne Foster requesting sistance during years Nats Richland WA year Nats manpower requirement CL Racing extensive Bob has asked anyone can provide timing modelprocessing assistance please drop him note 1455 South Peacehaven Rd Clemmons NC 27012 As always solicit comments photos share readers Whistle/Tierney Continued page 92 stored eight-bit bytes inter nal registers processor pur poses entire string bits can consid ered 48-bit word processor contin uously scans switches compares new input switch state previously stored its memory Any change switch state will stored 31M evaluation will begin bell set task begins processor applies mask containing possible triplets could occur bit pattern mask simplified terms oriented according bit position triplets mask recognize bit 1 part triplet method requires some time during evaluation process bit must first accomplish entire bit pattern shifted bit position mask reapplied process continued until 46 48 bits have shifted bit #1 position remaining two shifts performed since two bits cant constitute triplet no match found bell turned off scanning continues Complicated time-consum ing sounds execution process times duration beep heard pin removed replaced however match found bell re mains program returns switch scanning Since change state switch contact what triggers evalua tion process replacement of offending pins will result no-match eval uation turning bell off Construction Since full-size circuit board pattern approximately 86 41 beyond scope article publish etching drilling guide light fact have made arrangements local company provide partial kits completely assembled tested con trollers company actually stu dent coalition son mem ber will anything mow grass custom fabricating electronic cir cuit boards little help dad have built couple Eagle 63s pricing has established follows MUM EKE U BUUEEU SIG 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 PINT QUART GALLON 0% Nitromethane$1075 5% Nitromethane$365$525$1275 10% Nitromethane$415$550$1475 15% Nitromethane$430$635$1675 25% Nitromethane$515$795$2195 35% Nitromethane$595$925$2695 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1425 15% Nitromethane$1625 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 youve 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 yourselfPrices sobjoct change withoot notice See dealer first available order direct Call IJ 800-247-5008 toll free orders Latest Catalog $300 MANUFACTURING CO Montezuma IA 50171 2X photo-ready etching drilling guide $500 Custom-programmed EPROM$1250 Etched drilled printed circuit board plated-through holes$2500 Assembled tested controller board $10000 address SJB Custom Attn Jason Tierney 9788 Ralph Road Whitesville KY 42378 sure specify interested RC Pinboard Controller project bit costly earlier model hope its simplicity versatility can indeed write final chapter third-order intermod monitoring flying field Happy Flying Sea Dart/Gilgenbach Continued page 100 fan intake exhaust primarily concerned about maximizing static thrust taking off water Since top speed full-size Sea Dart 670 mph 1/9-scale model wouldnt have go over 100 mph give good scale effect Tom also recommended build model light possible achieve takeoff July 1989 175
Edition: Model Aviation - 1989/07
Page Numbers: 84, 174, 175
PROPER fuel tank construction several occa sions Racing enthusiasts have requested specifi cations foolproof fuel tank construction se quence races and/or good engines have lost result tank leak both Scale Rat Racers use stan dard cylindrical Rat tank cut down three ounces Scale four ounces Rat During construction tank manufac turer uses standard acid core solder flux Us ing torch medium heat remove rear front cover tank will find minor cor rosion residual flux inside tank remove tubes clean entire unit Ivory liq uid soap steel wool After methanol wash resolder joints tubes Sta-Brite silver solder using companion Sta-Brite liquid flux Sta-Brite has enough silver content produce excellent noncorrosive bond ductile enough take constant vibration hard landings leaking After reassembling tank just before seal ing rear tank freeze-out plug again wash unit cut down size tank rear cylindrical cover will too large because diameter tank tapers various sizes freeze-out plugs local auto parts store can used rear cap stoutness plug also strengthens rear area tank tank clean surround Perm A-Gasket blue silicone adhesive nature material permanent fuel-proof flexi bility make light secure mounting inside Rat pan vibration damper profiletype racer conclusion racing day spray small amount WD-40 tank neutral ize acid nature typical racing brew scratch-built tank required make sure have overlapping flap solder seam support flap omitted manufacture right-angle mandrel trim size out support flaps tank will stress tually crack carrying full load fuel during hard landing Flying wire construction Recently witnessed several control line failures during racing heats Careful inspection after fact showed propen sity failure three types seem ingly minor construction variations shown AMA rule book present first variation involves size wrap ping wire used secure line ends Fine cop per wire occasionally hard find Modelers will use standard copper wire pack aged spool too t zk proper wrap ping can bind han up used internal line attachments second type variation occurs during con struction line end loops loop wire used around spindle Two loops specified AMA rule book 018 015 flying wires being constructed tight double loop over spindle difficult individual does make up set lines very often third variation involves failure wrap wire carefully up spindle failures observed revealed wrapping car ried close enough spindle resulting flexing ultimate breaking wire Strict adherence diagrams instruc tions given AMA rule book will minimize ruining aircraft expensive engines mention eliminating danger fellow compet itors spectators Flying techniques recent meet Whittier Narrows CA drew excellent number en trants Control Line Racing events includ ing Mouse Mouse II Scale Racing Slow Rat Fast Rat Team Race month am enclosing picture John McCollum hat flying against Steve Ei chenberger Scale Racing John using block ing technique keep Steve backside pilots circle As can see Steve leaning John attempt negate advantage both pilots try occupy small center flying circle Notice six-foot landing stripe Out beyond center circle important have landing stripe marked aid pilot acti vates fuel shutoff lines plane up pitman uses line reference plane inside outside racing circle situation might result missed catch damaged aircraft Gllroy Model Club Gilroy CA has sent photograph contest held benefit Veterans Hospital Palo Alto CA pho tographs show Ernie Reece pitting WAM Wes tern Associated ModelersEd Sport Racer short grassy area Note fuel bottle has set far away plane Should alco hol fire occur plane being started fuel bottle will well out harms way Electrical connections During 89 Nats several situations electrical connection failures neutralized competitors ability win place event especially true Jerry Myers Slow Rat pitman electrical connection failure glow plug Continued page 174 84 Model Aviation Confrol Line Racing John Ballard 10102 Klmblewlck Dr Louisville KY 40223 Flying technique Seen Scale Racing Whittier Narrows CA match between John McCollum hat Steve Eichen berger John blocking Steve cen ter pilots circle Steve leaning him try regain lost advantage Ernie Reece seen pitting during WAM West ern Sport Race Veterans Hospital air show Palo Alto CA Note fuel bottle well away planea good safety measure case alcohol fire starts under plane engine being started y Dziak showing Bob Dalton con nection wire between finger contact glow plug plane Proper selection wire glow plug connector will mini mize electrical failuresand maximize potential have winning heatl Jim Ricketta fires up Slow Rat recent contest Ballard says its important have relatively long battery leads can run underneath wing help keep glow plug clip snagging wing release causing bad launch SOFT MOUNT THE EASY WAY WITH VIBRA-DAMPTM B EALIVIIS patent pending use up 60 in3 2cycles Laboratory tested contest proven 21 50 plus $175 shipping Mich residents add tax ALL HARDWARE INCLUDED UNIVERSAL engine isolation mounting system PERFORMANCE PRODUCTS NLIMITEJ 7093 E Dodge Rd Mt Morris MI 48458313 631-4894 Eon DETAILS & BROCHURE OF OTHER HIGH TECH PRODUCTS SEND $1 00 CL Combat/Johnson Continued page 83 Weldhond sealing around engine mounts covering dont want fuel seeping under covering melting foam model lasts longer test flight first match Spraying little epoxy works too doesnt melt foam clear dope would Flecto Varathane another product works fuel-proof wood joints suspect doesnt work well Weldbond high-tech models old Orbit Ace Reactor cup tea Barry Baxter has plans build dream ship Send SASE product list Barry Baxter 6490 Sonora Way Cypress CA 90630or call him 714 761-0672 Barry has big promoter 80mph Combat Nostalgia events southern California Using model looked like Clingon Warrior Starship got four five con secutive kills last Money Nate Los An geles Lets talk about beflcranks nownot midair kind kind use control model few years ago trend toward very slow controls using large bellcranks control handles close line spacing Remember ratio between distance pivot pushrod hole bellerank length elevator horn used determine much elevator travel youll have ideal situa tion Combat model have pushrod close pivot point bellerank can use fairly short elevator horn No use having lot throw bellerank necessitat ing giant elevator horn may break get knocked off crash *MPDEU reels ca Through trial error youll find out much elevator deflection model needs turn tight stalling slowing too much Warning Some models slow down give too much control also come sailing across circle Once get proper amount Up/Down other tuning choice have unless model has external bellerank using differ ent line spacing handle Some people can fly slow controls because arms jointed like orangutans lot fly ing day find arm getting tired may youre putting too much movement flying ratio between bellerank elevator horn can termed correct lets plane turn its tightest stalling guys like lit tle extra control available situations youd rather slow plane turn avoid hitting ground no correct way far amount handle movement concerned guys proper ratio style may look smooth another person same model may look awkward additional warning using handle locking nut top Its gonna snag opponents lines days youll thrill Oh what feeling Doe Passen reports Performance Model Parts Inc 12233 South 1565 East Draper UT 84020 place write own Cipolla unfortunately made illegal 4mm venturi rule FAt also pro hibits subport induction Glen Dye offering new longer-skirt piston several head/plug combinations too may also call Glen 801 571-7017 find out prices Doe reports theyre reasonable LARRY JOLLY KITS Now Stock Pantera 100 span Great Contesl Plane11995 Cheetah 112 span Aileron Contest Plane16495 Meteor 128 span Open Class Contest Plane13995 Flinger 59 Span great hand launch plane3495 CA Res add 7% Tax $395 S&H s3nD youd better get engine him before gets tired doing Doc Passen also has new Combat design called Crocodile-Doc-EF supposed snap tail off have some views AMA Combat rules might write John Salvin chairman Combat Advisory Committee address 17 Jewel Ct Orinda CA 94563 CL Racing/Ballard Continued page 84 resulted very long pit stop re sulted Jerry being eliminated competi tion Jerrys engine airplane near top speed during qualification sta ble battery connection contact points failure can easily occur Such failures usually originate wire go ing glow plug profile-style racers have much vibration easy wire fatigue crack/breakor connection comes loose glow plug have found best type wire use vinyl-coated copper dont use solid wire pre ferring stranded type having least 20 strands covered vinyl coating least A2 thick stranded copper wire will withstand much vibration before fatigues breaks Experience has shown glow plug connec tors sometimes fashioned piece 031 music wire bent acts spring clip over attachment point glow plug scheme shows propensity solder joint stress wire break wire joins clip have found small brass alligator clip best form attachment though somewhat clumsy spring-loaded alligator clip keeps good tension glow plug post will take tremendous amount vibration before fatiguing addition alligator clip easily removed plug needs changing music wire clip much harder release glow plug Finally Larry Dziak showed method minimize failure solder joint wire alligator clip slides piece smalldiameter silicone tubing over area around alligator clip wire absorbs some vibration minimizes chances break age point other end wire leading glow plug soldered finger contact plane turn finger contact designed wire glow plug soldered rear 174 Model Aviation NEW SPACE SAVING CONTAINER Faa boa 2-112x7-31ex9-lie Tough Rigid Polyettiylene udesall tubing erriers lock tubing through cap ostage North Products PO Box 18419- Cleveland Heights OH 44118 Gal Iiiqhi LiNE SYSTEMSI WE BUILD YOUR HELl TEST YOUR HELl \\REPAIRYOURHELI 2 North 7th St 613 ~i1 LehightonPo18235 WRITE OR CALL FOR INFORMATION PO Box 1502 Lewiston ME 04241 12 VOLT WINCHES WITH BRAKE 1 207 784-27361 pad ia screwed plane wire will securely pressed between pad fuselage minimize wire failure point Help needed 89 Nats received letter Bob Dalton Wayne Foster requesting sistance during years Nats Richland WA year Nats manpower requirement CL Racing extensive Bob has asked anyone can provide timing modelprocessing assistance please drop him note 1455 South Peacehaven Rd Clemmons NC 27012 As always solicit comments photos share readers Whistle/Tierney Continued page 92 stored eight-bit bytes inter nal registers processor pur poses entire string bits can consid ered 48-bit word processor contin uously scans switches compares new input switch state previously stored its memory Any change switch state will stored 31M evaluation will begin bell set task begins processor applies mask containing possible triplets could occur bit pattern mask simplified terms oriented according bit position triplets mask recognize bit 1 part triplet method requires some time during evaluation process bit must first accomplish entire bit pattern shifted bit position mask reapplied process continued until 46 48 bits have shifted bit #1 position remaining two shifts performed since two bits cant constitute triplet no match found bell turned off scanning continues Complicated time-consum ing sounds execution process times duration beep heard pin removed replaced however match found bell re mains program returns switch scanning Since change state switch contact what triggers evalua tion process replacement of offending pins will result no-match eval uation turning bell off Construction Since full-size circuit board pattern approximately 86 41 beyond scope article publish etching drilling guide light fact have made arrangements local company provide partial kits completely assembled tested con trollers company actually stu dent coalition son mem ber will anything mow grass custom fabricating electronic cir cuit boards little help dad have built couple Eagle 63s pricing has established follows MUM EKE U BUUEEU SIG 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 PINT QUART GALLON 0% Nitromethane$1075 5% Nitromethane$365$525$1275 10% Nitromethane$415$550$1475 15% Nitromethane$430$635$1675 25% Nitromethane$515$795$2195 35% Nitromethane$595$925$2695 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1425 15% Nitromethane$1625 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 youve 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 yourselfPrices sobjoct change withoot notice See dealer first available order direct Call IJ 800-247-5008 toll free orders Latest Catalog $300 MANUFACTURING CO Montezuma IA 50171 2X photo-ready etching drilling guide $500 Custom-programmed EPROM$1250 Etched drilled printed circuit board plated-through holes$2500 Assembled tested controller board $10000 address SJB Custom Attn Jason Tierney 9788 Ralph Road Whitesville KY 42378 sure specify interested RC Pinboard Controller project bit costly earlier model hope its simplicity versatility can indeed write final chapter third-order intermod monitoring flying field Happy Flying Sea Dart/Gilgenbach Continued page 100 fan intake exhaust primarily concerned about maximizing static thrust taking off water Since top speed full-size Sea Dart 670 mph 1/9-scale model wouldnt have go over 100 mph give good scale effect Tom also recommended build model light possible achieve takeoff July 1989 175