Contml Line Racing John Ballard MOUSE attended several contests 1984 14-year-old son enjoys flying Half-A Mouse Racing appears upswing number entries Mouse Racing events throughout Midwest area especially fall 1984 Mouse Race included meet receive numerous questions problems competitors well several letters written concerning engine consistency performance find consistency improved performance result several modifications engine/tank/backplate areas believe significant problem obtaining consistent runs Cox 049 engine well getting enough laps minimum 40 per tank Initially found threads backplate body needle valve appar ently loose allowed both air enter fuel system well allowing fuel leak out around needle valve needle valve body found putting small piece clear fuel line inside diameter slightly smaller needle valve needle valve eliminated problem addition necessary use little needle-valve spring comes engine Actually found cases did have enough pressure hold needle valve setting through out entire flight occasions would come find needle valve turned quarter one-half turn its takeoff setting just engine vibra tion adding piece tubing eliminated needle valve movement also fuel leakage around needle valve body also found very easy over-tighten four screws holding backplate tank engine doing causes small ruptures backplate since screws recessed metal area around screwheads extremely thin found rather extensive leakage screws seat backplate Next found removing dirt screen rear backplate drilling out venturi hole approx imately 003 009 improves engines performance also found increasing size further increased engine performancebut fuel consumption plus consistency dropped off considerably close observation fuel tank area found fill tube exit merely press-fitted tank cases find fuel leaking around tubes vibration running engine coating base Continued page 165 April 1985 69 Mouae Racing Nate Bob Kerr sits peripheral area pilot circle Jim Ong waits son land Open-class entry Note plane Just front height-marker poleyou seldom see local contest So bothering shows nothing photo pit stop its show good tech nique pitman keep wing plane hitting leg trousers launches Note Sig Racing Team pitman has left left leg extended away airplaneJust manythings steam has puttogether orderto winner Lets racenotcrashl VlcGarnerL enter ing pilot circle after relaunch Note hes coming angle Also note Gary Buffon other pilot has handle held highso wont catch lines Vics head Too pilots rush right occupied pilot circle Immedl ately after relaunch bump another pilot other guy holding handle low catches lines opponent Either way Its bad news TS TS RIOR TS T IH MOST SUPERIOR PILOT FIGURE ON THE MARKET LIGHTEST WEIGHT MOST REALISTIC AVAILABLE GIVE YOUR PLANE PILOT FOR YOUR NEWEST OLDEST OR NEXT CREATION R YOURS TODAY FULL FIGURES CIVILIANWWIIMILITARY 1/3 Scale$19951/5 Navy$1395 1/4 Scale14951/6AAF1195 1/5 Scale1295 Plus 1/12 Scale895 $250 shipping 1/12 Chopper 895 figure KNIGHTS OF THE AIR 7148 Lasting Light Way Columbia MD 21045 301-730-5596 CL Racing/Ballard Continued page 69 hese tubes high-strength epoxy tubes exit tank problem eliminated addition found f tubes put tanks iarious lengths overflow tube ases close enough top ank consequently full eighth-of-an junce extra fuel could added nerely moving tube rest against op tank filing small slot o tube could overflow properly Probably biggest problems encountered improper fit 2etween tank backplate pparently tightening backplate engine certainly sn airtight fit slotted area found taking small amount jewelers rouge oil lapping tank 2ackplate decent fit could accom pUshed also found took several lifferent backplates tanks get vhich after lapping did have minor leaks Obviously imperative rtave good gasket between engine 2lock tank also small rub er gasket over venturi area prevent sir entering fuel line Finally found new plastic reed valve seemed work much better older metal plastic s still prone failure suggest 219 Direct Only Plus Shipping 3405 Cleveland Ave SW Canton OH 44707 Send $1 Cutuieg 484-6010 after several flying sessions reed changed precautionary measure subtle modifications tank backplate resulted con sistent performance found speed engine picked up fuel consumption became serious prob lem picked up old tip California colleagues takes Moto Tool grinds various recesses backplate area obviously increases fuel capacity small additional fuel capacity gained grinding metal backplate resulted satisfactory number laps reasonably consistent performance Next found sizable difference performance could experienced replacement Cox head Gb-Bee half-A racing plug sport plug problem immedi ately encountered using Gb-Bee plugs did seat properly hand-fitted using No 600 wet dry sandpaper piece plate glass prior installation engine found cases rather sizable compression leaks until lapped head button prior installation also found Tee Dee piston cyl inder required maximum perform ance Utilizing Gb-Bee half-A racing head Tee Dee piston cylinder increased rpm approximately 5000 addition found engine block assembly produced different TDC top Dealers Distributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC PO Sos 2136 FaIrfax Virginia 2203 USA dead center slightly different port ing Joe Klaus Kustom Kraftsman ship has some liner shims 003 020 thick can used adjust timing slightly improved performance Finally found Kustom Krafts manship crankcase oil-lite bushing installed avoided crank bind ing up case after several runs 60%-70%-nitro fuel couple occa sions crankshaft bound up standard case relap crankshaft case KKs bushing seems eliminate particular prob lem same general problem crankshaft breakage racers told several individuals heat-treat ing crankshaft would provide lesser breakage heat-treated several crankshafts ran several heat treatment found virtually no differ ence durability Frankly just mandatory after number runs change crankshaft avoid failure race day photographs shows Open Mouse Racing Nats shows Californias Bob Kerr sitting peripheral area pilots circle Jim Ong waiting pit model over near height-standard poles height poles very seldom used local con testsbut always found national competition Continued page 168 PRODUCTS Complete Line Exhaust Systems Tuned Pipes Muffled Tuned Piaes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsupaai April1985 165 Experience best flying giant scale modal market Epoxy glass balsa and foam construction SOinspan 2SNP Areal44O 18-2lIbs Classic R/C Scale TH s0GRATI 40 WIng 15 25 EngInes CL Racing/Ballard Continued page 165 Line entanglements have received several letters concerning problems volved pilots entering exiting pilot circleand especially during takeoffs am enclosing picture Vic Garner California entering pilot cir cle angle avoid collision line entanglement other pilot already walking center circle area imperative pilot has center circle position keep hand high avoid hanging lines pilot enter ing circle especially pilot enters tall stature several cases have seen pilots enter circle directly after taking off either have collision other pilot line entanglement causes aircraft crash During recent contest St Louis observed Sig Racing teams pit man left leg extended back prevent aircrafts wing hitting takeoff occasions have seen pit men kneel down both knees air craft released wing brushes pitmans pant leg knee causing air craft torque inside circle chip ends off prop especially true longer-winged Rat Racers Scale Racers have 22to 24-inch wing Also pitting left leg extended allows pitman follow through hand holding aircraft guide smoothly off surface about 21-size Rat racer have several calls individuals building smaller 21-size Rats couple modelers Texas Cali fornia Chicago building try out spring will keep readers informed perform ance handling characteristics As always comments solicited appreciated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 Megas Aetos/Greene Continued page 73 slot first wing Use triangle get wing fuselage square another angle should 900 wing leading edge Also fuselage should 900 workbench elevate wing tips equal distance surface Have fuselage just touching workbench used epoxy glue wing fuselage dry drill 1A-in hole fuselage bottom through wing near leading edge shown plan glue dowel will help keep together through years Flaps Epoxy three hinges inboard flap first followed three hinges outboard wing trailing edge dry epoxy other end hinges flap wing found best start center work tip second-stage hinge epoxy ing time remembering push hinge far will go Leave very small gap smaller better Next epoxy horn bearing trail ing edge wing Tail surfaces Epoxy stabilizer elevator fuselage being careful have unit aligned perfectly Eyeball stabilizer front having bottom stabilizer appear just sit top wing Also measure distance hinge stabilizer tip straight forward hinge flap should same side plane will yaw time control given Get alignment perfect before epoxy dries Reinforce stabilizer mounting /4-in triangle scrap under side fuselage Glue rudder place includ ing lower portion lower portion glves straight line reference during maneuvers Controls start hookup bellcrank stabilizer neutral pushrod stabilizer bellcrank will overlap two inches Wrap overlap copper wirenot wrap small two three wraps spaced about / apart solder small wraps will stronger long Next solder flap pushrod main control surfaces connect ing same way use one-to-one hookup con trol surfaces airplane responds very quickly pushrods should go holes farthest control sur face like use hole closest pivot point bellcrank setup makes control response very slow However choice yours Fuel tank like build own ever 3/2- 4-oz Sullivan slant tank similar will work just fine Whatever tank choose make sure center tank center engine look outboard tip good way check take glow plug out place piece l/in music wire across cooling fins toward leading edge wing over tank tank pickup should centerline tank shown plan Use 4 x 10-in tin stock 1A-in brass tubing Use rosin-core solder fuselage vise can help bending tank used light-duty soldering gun heavy-duty should better job 168 Model Aviation Power Soar New Heights S LT-50 GEAR MOTOR Leisures Gear Drive conversion 31 powerful LT-50 develops up 2 lbs static trhrust Gear Drive also features ball bearing Delrin/brass gearing glass loaded polycarbonate housing Send self-addressed stamped envelope catalog ap plication notes Leisure 11 DeerspringllrvinelCA 92714 MOD-LERM AFFORDABLE MODELING ACCESSORIES SOCKET HEAD SCREWS W/WASHERS No 028 90 No 038 Zi44~/4 1P1 $100 No 0786 4/42 Pk$110 No 088 532 4 12 MC $1 20 No 118 ~i*-* 2t' $155 BLIND NUTS AND LOCK NUTS No 128440 Blind12 Pk$ 95 No 148 6-3~ba jt2 P $1 10 No 158 8rBlI~ 12pk $1 25 No 168 4 LoCk/ 2k $ 45 No 188 Lock/ /12 $ 50 No 1988Locj ji2P$ 55 NYLI4WING OLTS No 208832xtl2Pk$ 80 No 218 $41f l2Pk $ 90 No 23B -3t1--lf4 1-2tk $110 No 248 10-32 x 11/2 12 Ph $135 No 268 1/4-2k x11/2 12 Ph $2 10 No 288 1/4-2xQ V 2Pk $250 No 3081r4-20x3l2Pk$298 PR0P9PR 45A Sturdy letM iiA4iatic finger guard Protects against Cuts bruises white starting engine Package contains 1 smalt 1 medium 1 laige Si 50 SILICONE FUEL TUBING 60A 3/32 Small Medium 3 Ft $1 75 61A 1/8MediumtoLarge 3Ft$189 MODEL KLEEN 75A 2 ounce package makes tutl gallon Removes gtow gas fuel residue Mixes tap water Spray wipe off soft cloth paper towel$1 98 2 00 less Si 50 shipping ver S12 00 free shipping residents add 5% sales tax D s cash add Si 25 MODLER POBOX 70 MCKEE KY 40447 Wrfe coniplefe price list Dealer inquiries welconie
Edition: Model Aviation - 1985/04
Page Numbers: 69, 165, 168
Contml Line Racing John Ballard MOUSE attended several contests 1984 14-year-old son enjoys flying Half-A Mouse Racing appears upswing number entries Mouse Racing events throughout Midwest area especially fall 1984 Mouse Race included meet receive numerous questions problems competitors well several letters written concerning engine consistency performance find consistency improved performance result several modifications engine/tank/backplate areas believe significant problem obtaining consistent runs Cox 049 engine well getting enough laps minimum 40 per tank Initially found threads backplate body needle valve appar ently loose allowed both air enter fuel system well allowing fuel leak out around needle valve needle valve body found putting small piece clear fuel line inside diameter slightly smaller needle valve needle valve eliminated problem addition necessary use little needle-valve spring comes engine Actually found cases did have enough pressure hold needle valve setting through out entire flight occasions would come find needle valve turned quarter one-half turn its takeoff setting just engine vibra tion adding piece tubing eliminated needle valve movement also fuel leakage around needle valve body also found very easy over-tighten four screws holding backplate tank engine doing causes small ruptures backplate since screws recessed metal area around screwheads extremely thin found rather extensive leakage screws seat backplate Next found removing dirt screen rear backplate drilling out venturi hole approx imately 003 009 improves engines performance also found increasing size further increased engine performancebut fuel consumption plus consistency dropped off considerably close observation fuel tank area found fill tube exit merely press-fitted tank cases find fuel leaking around tubes vibration running engine coating base Continued page 165 April 1985 69 Mouae Racing Nate Bob Kerr sits peripheral area pilot circle Jim Ong waits son land Open-class entry Note plane Just front height-marker poleyou seldom see local contest So bothering shows nothing photo pit stop its show good tech nique pitman keep wing plane hitting leg trousers launches Note Sig Racing Team pitman has left left leg extended away airplaneJust manythings steam has puttogether orderto winner Lets racenotcrashl VlcGarnerL enter ing pilot circle after relaunch Note hes coming angle Also note Gary Buffon other pilot has handle held highso wont catch lines Vics head Too pilots rush right occupied pilot circle Immedl ately after relaunch bump another pilot other guy holding handle low catches lines opponent Either way Its bad news TS TS RIOR TS T IH MOST SUPERIOR PILOT FIGURE ON THE MARKET LIGHTEST WEIGHT MOST REALISTIC AVAILABLE GIVE YOUR PLANE PILOT FOR YOUR NEWEST OLDEST OR NEXT CREATION R YOURS TODAY FULL FIGURES CIVILIANWWIIMILITARY 1/3 Scale$19951/5 Navy$1395 1/4 Scale14951/6AAF1195 1/5 Scale1295 Plus 1/12 Scale895 $250 shipping 1/12 Chopper 895 figure KNIGHTS OF THE AIR 7148 Lasting Light Way Columbia MD 21045 301-730-5596 CL Racing/Ballard Continued page 69 hese tubes high-strength epoxy tubes exit tank problem eliminated addition found f tubes put tanks iarious lengths overflow tube ases close enough top ank consequently full eighth-of-an junce extra fuel could added nerely moving tube rest against op tank filing small slot o tube could overflow properly Probably biggest problems encountered improper fit 2etween tank backplate pparently tightening backplate engine certainly sn airtight fit slotted area found taking small amount jewelers rouge oil lapping tank 2ackplate decent fit could accom pUshed also found took several lifferent backplates tanks get vhich after lapping did have minor leaks Obviously imperative rtave good gasket between engine 2lock tank also small rub er gasket over venturi area prevent sir entering fuel line Finally found new plastic reed valve seemed work much better older metal plastic s still prone failure suggest 219 Direct Only Plus Shipping 3405 Cleveland Ave SW Canton OH 44707 Send $1 Cutuieg 484-6010 after several flying sessions reed changed precautionary measure subtle modifications tank backplate resulted con sistent performance found speed engine picked up fuel consumption became serious prob lem picked up old tip California colleagues takes Moto Tool grinds various recesses backplate area obviously increases fuel capacity small additional fuel capacity gained grinding metal backplate resulted satisfactory number laps reasonably consistent performance Next found sizable difference performance could experienced replacement Cox head Gb-Bee half-A racing plug sport plug problem immedi ately encountered using Gb-Bee plugs did seat properly hand-fitted using No 600 wet dry sandpaper piece plate glass prior installation engine found cases rather sizable compression leaks until lapped head button prior installation also found Tee Dee piston cyl inder required maximum perform ance Utilizing Gb-Bee half-A racing head Tee Dee piston cylinder increased rpm approximately 5000 addition found engine block assembly produced different TDC top Dealers Distributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC PO Sos 2136 FaIrfax Virginia 2203 USA dead center slightly different port ing Joe Klaus Kustom Kraftsman ship has some liner shims 003 020 thick can used adjust timing slightly improved performance Finally found Kustom Krafts manship crankcase oil-lite bushing installed avoided crank bind ing up case after several runs 60%-70%-nitro fuel couple occa sions crankshaft bound up standard case relap crankshaft case KKs bushing seems eliminate particular prob lem same general problem crankshaft breakage racers told several individuals heat-treat ing crankshaft would provide lesser breakage heat-treated several crankshafts ran several heat treatment found virtually no differ ence durability Frankly just mandatory after number runs change crankshaft avoid failure race day photographs shows Open Mouse Racing Nats shows Californias Bob Kerr sitting peripheral area pilots circle Jim Ong waiting pit model over near height-standard poles height poles very seldom used local con testsbut always found national competition Continued page 168 PRODUCTS Complete Line Exhaust Systems Tuned Pipes Muffled Tuned Piaes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsupaai April1985 165 Experience best flying giant scale modal market Epoxy glass balsa and foam construction SOinspan 2SNP Areal44O 18-2lIbs Classic R/C Scale TH s0GRATI 40 WIng 15 25 EngInes CL Racing/Ballard Continued page 165 Line entanglements have received several letters concerning problems volved pilots entering exiting pilot circleand especially during takeoffs am enclosing picture Vic Garner California entering pilot cir cle angle avoid collision line entanglement other pilot already walking center circle area imperative pilot has center circle position keep hand high avoid hanging lines pilot enter ing circle especially pilot enters tall stature several cases have seen pilots enter circle directly after taking off either have collision other pilot line entanglement causes aircraft crash During recent contest St Louis observed Sig Racing teams pit man left leg extended back prevent aircrafts wing hitting takeoff occasions have seen pit men kneel down both knees air craft released wing brushes pitmans pant leg knee causing air craft torque inside circle chip ends off prop especially true longer-winged Rat Racers Scale Racers have 22to 24-inch wing Also pitting left leg extended allows pitman follow through hand holding aircraft guide smoothly off surface about 21-size Rat racer have several calls individuals building smaller 21-size Rats couple modelers Texas Cali fornia Chicago building try out spring will keep readers informed perform ance handling characteristics As always comments solicited appreciated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 Megas Aetos/Greene Continued page 73 slot first wing Use triangle get wing fuselage square another angle should 900 wing leading edge Also fuselage should 900 workbench elevate wing tips equal distance surface Have fuselage just touching workbench used epoxy glue wing fuselage dry drill 1A-in hole fuselage bottom through wing near leading edge shown plan glue dowel will help keep together through years Flaps Epoxy three hinges inboard flap first followed three hinges outboard wing trailing edge dry epoxy other end hinges flap wing found best start center work tip second-stage hinge epoxy ing time remembering push hinge far will go Leave very small gap smaller better Next epoxy horn bearing trail ing edge wing Tail surfaces Epoxy stabilizer elevator fuselage being careful have unit aligned perfectly Eyeball stabilizer front having bottom stabilizer appear just sit top wing Also measure distance hinge stabilizer tip straight forward hinge flap should same side plane will yaw time control given Get alignment perfect before epoxy dries Reinforce stabilizer mounting /4-in triangle scrap under side fuselage Glue rudder place includ ing lower portion lower portion glves straight line reference during maneuvers Controls start hookup bellcrank stabilizer neutral pushrod stabilizer bellcrank will overlap two inches Wrap overlap copper wirenot wrap small two three wraps spaced about / apart solder small wraps will stronger long Next solder flap pushrod main control surfaces connect ing same way use one-to-one hookup con trol surfaces airplane responds very quickly pushrods should go holes farthest control sur face like use hole closest pivot point bellcrank setup makes control response very slow However choice yours Fuel tank like build own ever 3/2- 4-oz Sullivan slant tank similar will work just fine Whatever tank choose make sure center tank center engine look outboard tip good way check take glow plug out place piece l/in music wire across cooling fins toward leading edge wing over tank tank pickup should centerline tank shown plan Use 4 x 10-in tin stock 1A-in brass tubing Use rosin-core solder fuselage vise can help bending tank used light-duty soldering gun heavy-duty should better job 168 Model Aviation Power Soar New Heights S LT-50 GEAR MOTOR Leisures Gear Drive conversion 31 powerful LT-50 develops up 2 lbs static trhrust Gear Drive also features ball bearing Delrin/brass gearing glass loaded polycarbonate housing Send self-addressed stamped envelope catalog ap plication notes Leisure 11 DeerspringllrvinelCA 92714 MOD-LERM AFFORDABLE MODELING ACCESSORIES SOCKET HEAD SCREWS W/WASHERS No 028 90 No 038 Zi44~/4 1P1 $100 No 0786 4/42 Pk$110 No 088 532 4 12 MC $1 20 No 118 ~i*-* 2t' $155 BLIND NUTS AND LOCK NUTS No 128440 Blind12 Pk$ 95 No 148 6-3~ba jt2 P $1 10 No 158 8rBlI~ 12pk $1 25 No 168 4 LoCk/ 2k $ 45 No 188 Lock/ /12 $ 50 No 1988Locj ji2P$ 55 NYLI4WING OLTS No 208832xtl2Pk$ 80 No 218 $41f l2Pk $ 90 No 23B -3t1--lf4 1-2tk $110 No 248 10-32 x 11/2 12 Ph $135 No 268 1/4-2k x11/2 12 Ph $2 10 No 288 1/4-2xQ V 2Pk $250 No 3081r4-20x3l2Pk$298 PR0P9PR 45A Sturdy letM iiA4iatic finger guard Protects against Cuts bruises white starting engine Package contains 1 smalt 1 medium 1 laige Si 50 SILICONE FUEL TUBING 60A 3/32 Small Medium 3 Ft $1 75 61A 1/8MediumtoLarge 3Ft$189 MODEL KLEEN 75A 2 ounce package makes tutl gallon Removes gtow gas fuel residue Mixes tap water Spray wipe off soft cloth paper towel$1 98 2 00 less Si 50 shipping ver S12 00 free shipping residents add 5% sales tax D s cash add Si 25 MODLER POBOX 70 MCKEE KY 40447 Wrfe coniplefe price list Dealer inquiries welconie
Edition: Model Aviation - 1985/04
Page Numbers: 69, 165, 168
Contml Line Racing John Ballard MOUSE attended several contests 1984 14-year-old son enjoys flying Half-A Mouse Racing appears upswing number entries Mouse Racing events throughout Midwest area especially fall 1984 Mouse Race included meet receive numerous questions problems competitors well several letters written concerning engine consistency performance find consistency improved performance result several modifications engine/tank/backplate areas believe significant problem obtaining consistent runs Cox 049 engine well getting enough laps minimum 40 per tank Initially found threads backplate body needle valve appar ently loose allowed both air enter fuel system well allowing fuel leak out around needle valve needle valve body found putting small piece clear fuel line inside diameter slightly smaller needle valve needle valve eliminated problem addition necessary use little needle-valve spring comes engine Actually found cases did have enough pressure hold needle valve setting through out entire flight occasions would come find needle valve turned quarter one-half turn its takeoff setting just engine vibra tion adding piece tubing eliminated needle valve movement also fuel leakage around needle valve body also found very easy over-tighten four screws holding backplate tank engine doing causes small ruptures backplate since screws recessed metal area around screwheads extremely thin found rather extensive leakage screws seat backplate Next found removing dirt screen rear backplate drilling out venturi hole approx imately 003 009 improves engines performance also found increasing size further increased engine performancebut fuel consumption plus consistency dropped off considerably close observation fuel tank area found fill tube exit merely press-fitted tank cases find fuel leaking around tubes vibration running engine coating base Continued page 165 April 1985 69 Mouae Racing Nate Bob Kerr sits peripheral area pilot circle Jim Ong waits son land Open-class entry Note plane Just front height-marker poleyou seldom see local contest So bothering shows nothing photo pit stop its show good tech nique pitman keep wing plane hitting leg trousers launches Note Sig Racing Team pitman has left left leg extended away airplaneJust manythings steam has puttogether orderto winner Lets racenotcrashl VlcGarnerL enter ing pilot circle after relaunch Note hes coming angle Also note Gary Buffon other pilot has handle held highso wont catch lines Vics head Too pilots rush right occupied pilot circle Immedl ately after relaunch bump another pilot other guy holding handle low catches lines opponent Either way Its bad news TS TS RIOR TS T IH MOST SUPERIOR PILOT FIGURE ON THE MARKET LIGHTEST WEIGHT MOST REALISTIC AVAILABLE GIVE YOUR PLANE PILOT FOR YOUR NEWEST OLDEST OR NEXT CREATION R YOURS TODAY FULL FIGURES CIVILIANWWIIMILITARY 1/3 Scale$19951/5 Navy$1395 1/4 Scale14951/6AAF1195 1/5 Scale1295 Plus 1/12 Scale895 $250 shipping 1/12 Chopper 895 figure KNIGHTS OF THE AIR 7148 Lasting Light Way Columbia MD 21045 301-730-5596 CL Racing/Ballard Continued page 69 hese tubes high-strength epoxy tubes exit tank problem eliminated addition found f tubes put tanks iarious lengths overflow tube ases close enough top ank consequently full eighth-of-an junce extra fuel could added nerely moving tube rest against op tank filing small slot o tube could overflow properly Probably biggest problems encountered improper fit 2etween tank backplate pparently tightening backplate engine certainly sn airtight fit slotted area found taking small amount jewelers rouge oil lapping tank 2ackplate decent fit could accom pUshed also found took several lifferent backplates tanks get vhich after lapping did have minor leaks Obviously imperative rtave good gasket between engine 2lock tank also small rub er gasket over venturi area prevent sir entering fuel line Finally found new plastic reed valve seemed work much better older metal plastic s still prone failure suggest 219 Direct Only Plus Shipping 3405 Cleveland Ave SW Canton OH 44707 Send $1 Cutuieg 484-6010 after several flying sessions reed changed precautionary measure subtle modifications tank backplate resulted con sistent performance found speed engine picked up fuel consumption became serious prob lem picked up old tip California colleagues takes Moto Tool grinds various recesses backplate area obviously increases fuel capacity small additional fuel capacity gained grinding metal backplate resulted satisfactory number laps reasonably consistent performance Next found sizable difference performance could experienced replacement Cox head Gb-Bee half-A racing plug sport plug problem immedi ately encountered using Gb-Bee plugs did seat properly hand-fitted using No 600 wet dry sandpaper piece plate glass prior installation engine found cases rather sizable compression leaks until lapped head button prior installation also found Tee Dee piston cyl inder required maximum perform ance Utilizing Gb-Bee half-A racing head Tee Dee piston cylinder increased rpm approximately 5000 addition found engine block assembly produced different TDC top Dealers Distributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC PO Sos 2136 FaIrfax Virginia 2203 USA dead center slightly different port ing Joe Klaus Kustom Kraftsman ship has some liner shims 003 020 thick can used adjust timing slightly improved performance Finally found Kustom Krafts manship crankcase oil-lite bushing installed avoided crank bind ing up case after several runs 60%-70%-nitro fuel couple occa sions crankshaft bound up standard case relap crankshaft case KKs bushing seems eliminate particular prob lem same general problem crankshaft breakage racers told several individuals heat-treat ing crankshaft would provide lesser breakage heat-treated several crankshafts ran several heat treatment found virtually no differ ence durability Frankly just mandatory after number runs change crankshaft avoid failure race day photographs shows Open Mouse Racing Nats shows Californias Bob Kerr sitting peripheral area pilots circle Jim Ong waiting pit model over near height-standard poles height poles very seldom used local con testsbut always found national competition Continued page 168 PRODUCTS Complete Line Exhaust Systems Tuned Pipes Muffled Tuned Piaes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsupaai April1985 165 Experience best flying giant scale modal market Epoxy glass balsa and foam construction SOinspan 2SNP Areal44O 18-2lIbs Classic R/C Scale TH s0GRATI 40 WIng 15 25 EngInes CL Racing/Ballard Continued page 165 Line entanglements have received several letters concerning problems volved pilots entering exiting pilot circleand especially during takeoffs am enclosing picture Vic Garner California entering pilot cir cle angle avoid collision line entanglement other pilot already walking center circle area imperative pilot has center circle position keep hand high avoid hanging lines pilot enter ing circle especially pilot enters tall stature several cases have seen pilots enter circle directly after taking off either have collision other pilot line entanglement causes aircraft crash During recent contest St Louis observed Sig Racing teams pit man left leg extended back prevent aircrafts wing hitting takeoff occasions have seen pit men kneel down both knees air craft released wing brushes pitmans pant leg knee causing air craft torque inside circle chip ends off prop especially true longer-winged Rat Racers Scale Racers have 22to 24-inch wing Also pitting left leg extended allows pitman follow through hand holding aircraft guide smoothly off surface about 21-size Rat racer have several calls individuals building smaller 21-size Rats couple modelers Texas Cali fornia Chicago building try out spring will keep readers informed perform ance handling characteristics As always comments solicited appreciated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 Megas Aetos/Greene Continued page 73 slot first wing Use triangle get wing fuselage square another angle should 900 wing leading edge Also fuselage should 900 workbench elevate wing tips equal distance surface Have fuselage just touching workbench used epoxy glue wing fuselage dry drill 1A-in hole fuselage bottom through wing near leading edge shown plan glue dowel will help keep together through years Flaps Epoxy three hinges inboard flap first followed three hinges outboard wing trailing edge dry epoxy other end hinges flap wing found best start center work tip second-stage hinge epoxy ing time remembering push hinge far will go Leave very small gap smaller better Next epoxy horn bearing trail ing edge wing Tail surfaces Epoxy stabilizer elevator fuselage being careful have unit aligned perfectly Eyeball stabilizer front having bottom stabilizer appear just sit top wing Also measure distance hinge stabilizer tip straight forward hinge flap should same side plane will yaw time control given Get alignment perfect before epoxy dries Reinforce stabilizer mounting /4-in triangle scrap under side fuselage Glue rudder place includ ing lower portion lower portion glves straight line reference during maneuvers Controls start hookup bellcrank stabilizer neutral pushrod stabilizer bellcrank will overlap two inches Wrap overlap copper wirenot wrap small two three wraps spaced about / apart solder small wraps will stronger long Next solder flap pushrod main control surfaces connect ing same way use one-to-one hookup con trol surfaces airplane responds very quickly pushrods should go holes farthest control sur face like use hole closest pivot point bellcrank setup makes control response very slow However choice yours Fuel tank like build own ever 3/2- 4-oz Sullivan slant tank similar will work just fine Whatever tank choose make sure center tank center engine look outboard tip good way check take glow plug out place piece l/in music wire across cooling fins toward leading edge wing over tank tank pickup should centerline tank shown plan Use 4 x 10-in tin stock 1A-in brass tubing Use rosin-core solder fuselage vise can help bending tank used light-duty soldering gun heavy-duty should better job 168 Model Aviation Power Soar New Heights S LT-50 GEAR MOTOR Leisures Gear Drive conversion 31 powerful LT-50 develops up 2 lbs static trhrust Gear Drive also features ball bearing Delrin/brass gearing glass loaded polycarbonate housing Send self-addressed stamped envelope catalog ap plication notes Leisure 11 DeerspringllrvinelCA 92714 MOD-LERM AFFORDABLE MODELING ACCESSORIES SOCKET HEAD SCREWS W/WASHERS No 028 90 No 038 Zi44~/4 1P1 $100 No 0786 4/42 Pk$110 No 088 532 4 12 MC $1 20 No 118 ~i*-* 2t' $155 BLIND NUTS AND LOCK NUTS No 128440 Blind12 Pk$ 95 No 148 6-3~ba jt2 P $1 10 No 158 8rBlI~ 12pk $1 25 No 168 4 LoCk/ 2k $ 45 No 188 Lock/ /12 $ 50 No 1988Locj ji2P$ 55 NYLI4WING OLTS No 208832xtl2Pk$ 80 No 218 $41f l2Pk $ 90 No 23B -3t1--lf4 1-2tk $110 No 248 10-32 x 11/2 12 Ph $135 No 268 1/4-2k x11/2 12 Ph $2 10 No 288 1/4-2xQ V 2Pk $250 No 3081r4-20x3l2Pk$298 PR0P9PR 45A Sturdy letM iiA4iatic finger guard Protects against Cuts bruises white starting engine Package contains 1 smalt 1 medium 1 laige Si 50 SILICONE FUEL TUBING 60A 3/32 Small Medium 3 Ft $1 75 61A 1/8MediumtoLarge 3Ft$189 MODEL KLEEN 75A 2 ounce package makes tutl gallon Removes gtow gas fuel residue Mixes tap water Spray wipe off soft cloth paper towel$1 98 2 00 less Si 50 shipping ver S12 00 free shipping residents add 5% sales tax D s cash add Si 25 MODLER POBOX 70 MCKEE KY 40447 Wrfe coniplefe price list Dealer inquiries welconie