Control Line. Scale Mike Gretz IF SOMEONE take count CL Scale models being built today would find being constructed so-called RC kits plans Due laws econom ics almost scale kits being brought onto market nowadays labeled RC label shouldnt taken too literally nature scale model basically same whether controlled radio control lines aircraft flew good full-size radio versions will perform equally well control lines Ive received letters asking advice converting RC kit CL scale benefit currently contemplating such project winter thoughts guidelines what need know majority RC scale kits plans available 35 60 engine size range make best can didates conversion top notch controlline scale flying am advocate what some might term large models control line scale Typical monoplanes wingspan 50 75 biplanes wingspan 40 65 powered engines 40 60 cu what feel optimum size good scale flight performance dont mean imply 70 span model will magically fly better 45 version same air craft much easier keep allimportant wing power loadings within reason model built size range earlier years CL Scale models tended small size terrible wing loadings consequently bad flight characteristics typically unstable roller-coaster flight path gave rise brick string impression CL Scale Larger models almost always fly better CL Scale model doesnt need larger engine recommended RC version kit plan calls 2540 engine would use 40 best per formance recommends 45-60 would go 60 means should use throttle-equipped engine maximum realism enjoyment throttle normally actuated using 3line bellcrank handle system such marketed Sturdi-Bilt J-Roberts Flight Control G-S Products throttle equipped engine absolute necessity competitive contests Another often asked question What kind aerobatic performance can expect scale model problem regardless subject choice scale model size usually cannot perform aerobatics confines CL flight circle unless extremely light hand Ive seen 70 span Zlin Akrobat weighing 4 lbs loop fly inverted 40 power other hand Ive seen both 72 span Ryan 7 lbs 72 span Yak 7 lbs crash bottom attempted loop As can see wing loading all-important Continued page 104 LEADING EDGE AVERAGE CHORD TRAILING EDGE Leadout Spacing FRONT THROTTLEREAR 330/ OF THE AVERAGE CHORD TOP VIEW OF INBOARD WING PANEL locate belicrank leadouts tapered wing Typical Tapered Wing MonoplaneThis drawing helpsand will text Note position throttle line 40 Model Aviation Dave Falenhagen built Sport Scale Clipped Wing Cub Sig RC kit Note leadout bellcrank locations good R C scale kit will make good control line scale job Built Bob Holman RC plans Dks arog gins 65in Westland Whirlwind powered two Fox 35s Finish Silkspan painted Aero Gloss Military Flats TIP CHORD CRANK PIVOT ROOT CHORD SCALE CLASEiCS 7Plans & Construction Manual CURTISS HAWK PEE STINSONRELIANT SR9 SoaI94oSpan 62200MScaI 12r Span$2500 2SoaIa 63 Span 12002Scale 84 Spanj500 lVoSoaIa47Span 1OliScale 63 Span$1200 CUF1TISS GOSHAWK FilCO 2 Scala 03 Span51590 CURTISS GULFHAWK lA . 2Soala 63 Span 51500 Scale 94i Span 53OP P1000 Add $100 Pestg 04 HondlIng 00t01d US Add SS00MO oil Poymonte toRichard G Barron1213 Hol SprIng Ln Grand Blanc MichIgan 48439 Bald 010 0 C0npt Infe-otlon TX 75042 Phone 214 272-5210 Gene Hempel Tom Upton 301 N Yale Dr Garland TX 75042 CL Navy Carrier/Perry continued page 39 Ive trying get across years doesnt take machine shop trick air plane large bankroll enjoy Car rier flying well Profile won using commercially available equipment minor modifications dis cussed length magazineno secrets fuel right off dealers shelf Class almost different engines entries other 40-size events have encouraged engine manufacturers produce wide variety good 40 engines technology spreading RC 40s well Most good hobby shops should have selection engines would good Class mention Pylon Rat engines cast away because no longer restart well enough Class II fewer engine types Webra Supertigre Rossi no dominant engines manufacturers building new 60s RC Pattern should really great Class II come throttles dont put down suction fuel systems either sec ond highest Class II flight score NATS 1576 went MO-I nothing moveable elevator top speed 2 mph behind leader engine used stock Super tigre carburetor suction fuel system Profile 73% engines Supertigre 5T35 three Fox Profile Carrier Specials TWA did fly because damage model Supertigres took trophies So pass word get friends out fly Carrier Take Profile ships field weekends pass handle around Once someone has flown throttle its hard go back just two lines last few issues have listed new rules proposals current cycle havent read means Some proposals may sound good others may turn stomach whatever opinion owe self make thoughts known CLCB representative Hurry want heard addresses Competition Newsletter section CLCB members dont have crystal balls tell what want have hear Invest few minutes future event Richard L Perry 5016 ngelita Ave Dayton OH 45424 CL Scale/Gretz continued page 40 Keep model light possible want fly well somehow make lighter hope aerobatics Should bellcrank leadouts imbedded wing should belicrank mounted middle heightwise fuselage leadouts projecting straight out real answer depends great extent layout subject aircraft scale detail ing involved So far aircraft Ive modeled preference has mount bellcrank inside fuselage instead wing simply because avoids problem having elevator throttle pushrod disconnect bellcrank wing removed leadouts can located wingtip plastic plywood wire guide Make holes leadout guide large enough allow flexible leadouts pulled through guide pushed fuselage during static judging transit Locate fore aft bellcrank leadout positions relation aver age chord wing puts con trol system direct easy understand trace relationship aircrafts Center Gravity Center Pressure works almost normal shape arrangement wingsmonoplanes bi planes constant chord tapered delta etc accompanying drawing shows gen eral relationship control system average chord start own CL designs scale can find average chord models wing draw full-size plan exact locations control system components can determined model bellcrank position can varied slightly necessary allow room cockpit landing gear details etc Figure 33% average chord rearward limit have moved bellcrank much 2 ahead point no ill effects Mount bellcrank least /s thick plywood 5-ply 3-ply accord ing manufacturers instructions center leadout group should slightly behind 33% average chord point isnt necessary have adjustable leadouts get general location Spacing between leadouts isnt really critical Some CL stunt designs have leadouts right top other others have anywhere tween leadouts avoid chance line connectors becoming tangled suggest spacing leadouts 3-line system shown drawing best build separate moveable aileron rudder surfaces rather using drawn ink facsimilies maximum scale points model can fully flight trimmable Depending upon factors some degree aileron de flection may needed get model fly shoulder height wings perfectly level Use about 1 2 ounces outboard wingtip weight rudder should offset out side flight circle normal CL models Right engine offset isnt normally used scale model usually impossible build model being detectable nose contours isnt really needed larger size scale model smaller lighter sport model Westland Whirlwind Story fullscale military aviation history Westland Whirlwind has distinction being 104 Model Aviation new LAssIC kit FLYLINI 11/2 scaLe GREATLAKES Trainer 40 span 09-25 power 4 channels nc 5 complete catalog 25 FLYLINE MODELS INC 4 2820 DOAR AVENUE 52 FAIRFAX VIRGINIA 22021703 573-2030 Dont keep lending yours friend. IW 4W BUY HIM HIS OWN SULLIVAN STARTER FOR CHRISTMAS Superstar Starters . perfect gift modeler cially keeps borrowing Sullivan starter Has higher torque & RPMs heavy duty long life motor instant-on strip switch safety hand guard two year guarantee original everyone else tries copy buddy will find real turn-on Christmas P R 0 D U C T S N C SVILLE ROAD OW GROVE PA 19000 215 659-3000 first single-seat twin-engined fighter see service air force major power first flown 1938 very effective part British fighter strength during early years WW2 Its initial role long-range es court fighter night fighter Later ex amples often called Whirlihombers employed low-level cross-channel fighter-bomber sorties attacking shipping railroads bridges harbor facilities Highly maneuverable all-metal Whirl winds speed low altitudes great its contemporary fighters its range superior Power two 885hp Rolls-Royce Peregrine engines wingspan 45 feet Unfortunately air fields Whirlwind could use restricted its high landing speed 80 mph Four 20-mm cannons grouped nose yielded enormous accurate concentration firepower Whirli bomber versions could also carry bomb load 500 pounds Dick Scorgins CL model Whirlwind realistically cap tures spirit unique aircraft Mike Gretz Box 162 Montezuma IA 50171 Indoor WC/Harlan continued page 47 room abuse intent rule Practice day Saturday opened 60-degree temperature heavy over cast broke off midday give us warming sun fliers began make flights mid-30s drift incon sistent part hangar another no well-defined pattern Fortunately very little side drift As temperature rose did times best posted after 700 Wolthoorn Netherlands 3717 Butty Switzerland 3850 Bud Romak joined 40-minute FAI club 4112 followed 4138 manager Erv Rodemsky worked closely together find just right power combination quickly came obvious new Pirelli necessity everyone else also US team practiced cautiously Bill Hulbert several flights mid-30s Dan Domina three over 36/2 Jim Richmond put models halfway up-and saw 34s 35s Everyone satisfied Sunday morning arose cloudless sky very light ground fog shrouded Cardington would burn off 1100 62 degrees inside hangar floor level began practice Bill Dan posted mid-25s getting 80 100 feet Jim tested little writing advertisers mention read about MA zing put model top eight minutes ballooned successfully dropped 30 feet finished 4 150 contest started 1100 eight hours initiate nine flights little time waste waited little weather clear Jim stressed need two conservative first flights team member get us solidly board Bill offered go first started 1900 turns landed safely 3439 Dan next too put model just above 100 feet However motor walked off front hook bunched rear model stalled down 100 feet time 2314 visibly upset Dan rightfully Ron Green United Kingdom pow ered first flight top 615 discussion steering rule man agers meeting jury said didnt want see models blasted roof No fixed time set comments effect eight minutes normal peak met general agree ment Green forced balloon touched girder steering balloon exploded destroying model ended concern over steering rule tent flight least Early contest unbelievable tragedy struck Dieter Siebenmann Switzerland opened box propel lers pigeon searching food landed destroyed four propellers January 1979 105 string cant freed However question competitor allowed steer remained judgemental left
Edition: Model Aviation - 1979/01
Page Numbers: 40, 104, 105
Control Line. Scale Mike Gretz IF SOMEONE take count CL Scale models being built today would find being constructed so-called RC kits plans Due laws econom ics almost scale kits being brought onto market nowadays labeled RC label shouldnt taken too literally nature scale model basically same whether controlled radio control lines aircraft flew good full-size radio versions will perform equally well control lines Ive received letters asking advice converting RC kit CL scale benefit currently contemplating such project winter thoughts guidelines what need know majority RC scale kits plans available 35 60 engine size range make best can didates conversion top notch controlline scale flying am advocate what some might term large models control line scale Typical monoplanes wingspan 50 75 biplanes wingspan 40 65 powered engines 40 60 cu what feel optimum size good scale flight performance dont mean imply 70 span model will magically fly better 45 version same air craft much easier keep allimportant wing power loadings within reason model built size range earlier years CL Scale models tended small size terrible wing loadings consequently bad flight characteristics typically unstable roller-coaster flight path gave rise brick string impression CL Scale Larger models almost always fly better CL Scale model doesnt need larger engine recommended RC version kit plan calls 2540 engine would use 40 best per formance recommends 45-60 would go 60 means should use throttle-equipped engine maximum realism enjoyment throttle normally actuated using 3line bellcrank handle system such marketed Sturdi-Bilt J-Roberts Flight Control G-S Products throttle equipped engine absolute necessity competitive contests Another often asked question What kind aerobatic performance can expect scale model problem regardless subject choice scale model size usually cannot perform aerobatics confines CL flight circle unless extremely light hand Ive seen 70 span Zlin Akrobat weighing 4 lbs loop fly inverted 40 power other hand Ive seen both 72 span Ryan 7 lbs 72 span Yak 7 lbs crash bottom attempted loop As can see wing loading all-important Continued page 104 LEADING EDGE AVERAGE CHORD TRAILING EDGE Leadout Spacing FRONT THROTTLEREAR 330/ OF THE AVERAGE CHORD TOP VIEW OF INBOARD WING PANEL locate belicrank leadouts tapered wing Typical Tapered Wing MonoplaneThis drawing helpsand will text Note position throttle line 40 Model Aviation Dave Falenhagen built Sport Scale Clipped Wing Cub Sig RC kit Note leadout bellcrank locations good R C scale kit will make good control line scale job Built Bob Holman RC plans Dks arog gins 65in Westland Whirlwind powered two Fox 35s Finish Silkspan painted Aero Gloss Military Flats TIP CHORD CRANK PIVOT ROOT CHORD SCALE CLASEiCS 7Plans & Construction Manual CURTISS HAWK PEE STINSONRELIANT SR9 SoaI94oSpan 62200MScaI 12r Span$2500 2SoaIa 63 Span 12002Scale 84 Spanj500 lVoSoaIa47Span 1OliScale 63 Span$1200 CUF1TISS GOSHAWK FilCO 2 Scala 03 Span51590 CURTISS GULFHAWK lA . 2Soala 63 Span 51500 Scale 94i Span 53OP P1000 Add $100 Pestg 04 HondlIng 00t01d US Add SS00MO oil Poymonte toRichard G Barron1213 Hol SprIng Ln Grand Blanc MichIgan 48439 Bald 010 0 C0npt Infe-otlon TX 75042 Phone 214 272-5210 Gene Hempel Tom Upton 301 N Yale Dr Garland TX 75042 CL Navy Carrier/Perry continued page 39 Ive trying get across years doesnt take machine shop trick air plane large bankroll enjoy Car rier flying well Profile won using commercially available equipment minor modifications dis cussed length magazineno secrets fuel right off dealers shelf Class almost different engines entries other 40-size events have encouraged engine manufacturers produce wide variety good 40 engines technology spreading RC 40s well Most good hobby shops should have selection engines would good Class mention Pylon Rat engines cast away because no longer restart well enough Class II fewer engine types Webra Supertigre Rossi no dominant engines manufacturers building new 60s RC Pattern should really great Class II come throttles dont put down suction fuel systems either sec ond highest Class II flight score NATS 1576 went MO-I nothing moveable elevator top speed 2 mph behind leader engine used stock Super tigre carburetor suction fuel system Profile 73% engines Supertigre 5T35 three Fox Profile Carrier Specials TWA did fly because damage model Supertigres took trophies So pass word get friends out fly Carrier Take Profile ships field weekends pass handle around Once someone has flown throttle its hard go back just two lines last few issues have listed new rules proposals current cycle havent read means Some proposals may sound good others may turn stomach whatever opinion owe self make thoughts known CLCB representative Hurry want heard addresses Competition Newsletter section CLCB members dont have crystal balls tell what want have hear Invest few minutes future event Richard L Perry 5016 ngelita Ave Dayton OH 45424 CL Scale/Gretz continued page 40 Keep model light possible want fly well somehow make lighter hope aerobatics Should bellcrank leadouts imbedded wing should belicrank mounted middle heightwise fuselage leadouts projecting straight out real answer depends great extent layout subject aircraft scale detail ing involved So far aircraft Ive modeled preference has mount bellcrank inside fuselage instead wing simply because avoids problem having elevator throttle pushrod disconnect bellcrank wing removed leadouts can located wingtip plastic plywood wire guide Make holes leadout guide large enough allow flexible leadouts pulled through guide pushed fuselage during static judging transit Locate fore aft bellcrank leadout positions relation aver age chord wing puts con trol system direct easy understand trace relationship aircrafts Center Gravity Center Pressure works almost normal shape arrangement wingsmonoplanes bi planes constant chord tapered delta etc accompanying drawing shows gen eral relationship control system average chord start own CL designs scale can find average chord models wing draw full-size plan exact locations control system components can determined model bellcrank position can varied slightly necessary allow room cockpit landing gear details etc Figure 33% average chord rearward limit have moved bellcrank much 2 ahead point no ill effects Mount bellcrank least /s thick plywood 5-ply 3-ply accord ing manufacturers instructions center leadout group should slightly behind 33% average chord point isnt necessary have adjustable leadouts get general location Spacing between leadouts isnt really critical Some CL stunt designs have leadouts right top other others have anywhere tween leadouts avoid chance line connectors becoming tangled suggest spacing leadouts 3-line system shown drawing best build separate moveable aileron rudder surfaces rather using drawn ink facsimilies maximum scale points model can fully flight trimmable Depending upon factors some degree aileron de flection may needed get model fly shoulder height wings perfectly level Use about 1 2 ounces outboard wingtip weight rudder should offset out side flight circle normal CL models Right engine offset isnt normally used scale model usually impossible build model being detectable nose contours isnt really needed larger size scale model smaller lighter sport model Westland Whirlwind Story fullscale military aviation history Westland Whirlwind has distinction being 104 Model Aviation new LAssIC kit FLYLINI 11/2 scaLe GREATLAKES Trainer 40 span 09-25 power 4 channels nc 5 complete catalog 25 FLYLINE MODELS INC 4 2820 DOAR AVENUE 52 FAIRFAX VIRGINIA 22021703 573-2030 Dont keep lending yours friend. IW 4W BUY HIM HIS OWN SULLIVAN STARTER FOR CHRISTMAS Superstar Starters . perfect gift modeler cially keeps borrowing Sullivan starter Has higher torque & RPMs heavy duty long life motor instant-on strip switch safety hand guard two year guarantee original everyone else tries copy buddy will find real turn-on Christmas P R 0 D U C T S N C SVILLE ROAD OW GROVE PA 19000 215 659-3000 first single-seat twin-engined fighter see service air force major power first flown 1938 very effective part British fighter strength during early years WW2 Its initial role long-range es court fighter night fighter Later ex amples often called Whirlihombers employed low-level cross-channel fighter-bomber sorties attacking shipping railroads bridges harbor facilities Highly maneuverable all-metal Whirl winds speed low altitudes great its contemporary fighters its range superior Power two 885hp Rolls-Royce Peregrine engines wingspan 45 feet Unfortunately air fields Whirlwind could use restricted its high landing speed 80 mph Four 20-mm cannons grouped nose yielded enormous accurate concentration firepower Whirli bomber versions could also carry bomb load 500 pounds Dick Scorgins CL model Whirlwind realistically cap tures spirit unique aircraft Mike Gretz Box 162 Montezuma IA 50171 Indoor WC/Harlan continued page 47 room abuse intent rule Practice day Saturday opened 60-degree temperature heavy over cast broke off midday give us warming sun fliers began make flights mid-30s drift incon sistent part hangar another no well-defined pattern Fortunately very little side drift As temperature rose did times best posted after 700 Wolthoorn Netherlands 3717 Butty Switzerland 3850 Bud Romak joined 40-minute FAI club 4112 followed 4138 manager Erv Rodemsky worked closely together find just right power combination quickly came obvious new Pirelli necessity everyone else also US team practiced cautiously Bill Hulbert several flights mid-30s Dan Domina three over 36/2 Jim Richmond put models halfway up-and saw 34s 35s Everyone satisfied Sunday morning arose cloudless sky very light ground fog shrouded Cardington would burn off 1100 62 degrees inside hangar floor level began practice Bill Dan posted mid-25s getting 80 100 feet Jim tested little writing advertisers mention read about MA zing put model top eight minutes ballooned successfully dropped 30 feet finished 4 150 contest started 1100 eight hours initiate nine flights little time waste waited little weather clear Jim stressed need two conservative first flights team member get us solidly board Bill offered go first started 1900 turns landed safely 3439 Dan next too put model just above 100 feet However motor walked off front hook bunched rear model stalled down 100 feet time 2314 visibly upset Dan rightfully Ron Green United Kingdom pow ered first flight top 615 discussion steering rule man agers meeting jury said didnt want see models blasted roof No fixed time set comments effect eight minutes normal peak met general agree ment Green forced balloon touched girder steering balloon exploded destroying model ended concern over steering rule tent flight least Early contest unbelievable tragedy struck Dieter Siebenmann Switzerland opened box propel lers pigeon searching food landed destroyed four propellers January 1979 105 string cant freed However question competitor allowed steer remained judgemental left
Edition: Model Aviation - 1979/01
Page Numbers: 40, 104, 105
Control Line. Scale Mike Gretz IF SOMEONE take count CL Scale models being built today would find being constructed so-called RC kits plans Due laws econom ics almost scale kits being brought onto market nowadays labeled RC label shouldnt taken too literally nature scale model basically same whether controlled radio control lines aircraft flew good full-size radio versions will perform equally well control lines Ive received letters asking advice converting RC kit CL scale benefit currently contemplating such project winter thoughts guidelines what need know majority RC scale kits plans available 35 60 engine size range make best can didates conversion top notch controlline scale flying am advocate what some might term large models control line scale Typical monoplanes wingspan 50 75 biplanes wingspan 40 65 powered engines 40 60 cu what feel optimum size good scale flight performance dont mean imply 70 span model will magically fly better 45 version same air craft much easier keep allimportant wing power loadings within reason model built size range earlier years CL Scale models tended small size terrible wing loadings consequently bad flight characteristics typically unstable roller-coaster flight path gave rise brick string impression CL Scale Larger models almost always fly better CL Scale model doesnt need larger engine recommended RC version kit plan calls 2540 engine would use 40 best per formance recommends 45-60 would go 60 means should use throttle-equipped engine maximum realism enjoyment throttle normally actuated using 3line bellcrank handle system such marketed Sturdi-Bilt J-Roberts Flight Control G-S Products throttle equipped engine absolute necessity competitive contests Another often asked question What kind aerobatic performance can expect scale model problem regardless subject choice scale model size usually cannot perform aerobatics confines CL flight circle unless extremely light hand Ive seen 70 span Zlin Akrobat weighing 4 lbs loop fly inverted 40 power other hand Ive seen both 72 span Ryan 7 lbs 72 span Yak 7 lbs crash bottom attempted loop As can see wing loading all-important Continued page 104 LEADING EDGE AVERAGE CHORD TRAILING EDGE Leadout Spacing FRONT THROTTLEREAR 330/ OF THE AVERAGE CHORD TOP VIEW OF INBOARD WING PANEL locate belicrank leadouts tapered wing Typical Tapered Wing MonoplaneThis drawing helpsand will text Note position throttle line 40 Model Aviation Dave Falenhagen built Sport Scale Clipped Wing Cub Sig RC kit Note leadout bellcrank locations good R C scale kit will make good control line scale job Built Bob Holman RC plans Dks arog gins 65in Westland Whirlwind powered two Fox 35s Finish Silkspan painted Aero Gloss Military Flats TIP CHORD CRANK PIVOT ROOT CHORD SCALE CLASEiCS 7Plans & Construction Manual CURTISS HAWK PEE STINSONRELIANT SR9 SoaI94oSpan 62200MScaI 12r Span$2500 2SoaIa 63 Span 12002Scale 84 Spanj500 lVoSoaIa47Span 1OliScale 63 Span$1200 CUF1TISS GOSHAWK FilCO 2 Scala 03 Span51590 CURTISS GULFHAWK lA . 2Soala 63 Span 51500 Scale 94i Span 53OP P1000 Add $100 Pestg 04 HondlIng 00t01d US Add SS00MO oil Poymonte toRichard G Barron1213 Hol SprIng Ln Grand Blanc MichIgan 48439 Bald 010 0 C0npt Infe-otlon TX 75042 Phone 214 272-5210 Gene Hempel Tom Upton 301 N Yale Dr Garland TX 75042 CL Navy Carrier/Perry continued page 39 Ive trying get across years doesnt take machine shop trick air plane large bankroll enjoy Car rier flying well Profile won using commercially available equipment minor modifications dis cussed length magazineno secrets fuel right off dealers shelf Class almost different engines entries other 40-size events have encouraged engine manufacturers produce wide variety good 40 engines technology spreading RC 40s well Most good hobby shops should have selection engines would good Class mention Pylon Rat engines cast away because no longer restart well enough Class II fewer engine types Webra Supertigre Rossi no dominant engines manufacturers building new 60s RC Pattern should really great Class II come throttles dont put down suction fuel systems either sec ond highest Class II flight score NATS 1576 went MO-I nothing moveable elevator top speed 2 mph behind leader engine used stock Super tigre carburetor suction fuel system Profile 73% engines Supertigre 5T35 three Fox Profile Carrier Specials TWA did fly because damage model Supertigres took trophies So pass word get friends out fly Carrier Take Profile ships field weekends pass handle around Once someone has flown throttle its hard go back just two lines last few issues have listed new rules proposals current cycle havent read means Some proposals may sound good others may turn stomach whatever opinion owe self make thoughts known CLCB representative Hurry want heard addresses Competition Newsletter section CLCB members dont have crystal balls tell what want have hear Invest few minutes future event Richard L Perry 5016 ngelita Ave Dayton OH 45424 CL Scale/Gretz continued page 40 Keep model light possible want fly well somehow make lighter hope aerobatics Should bellcrank leadouts imbedded wing should belicrank mounted middle heightwise fuselage leadouts projecting straight out real answer depends great extent layout subject aircraft scale detail ing involved So far aircraft Ive modeled preference has mount bellcrank inside fuselage instead wing simply because avoids problem having elevator throttle pushrod disconnect bellcrank wing removed leadouts can located wingtip plastic plywood wire guide Make holes leadout guide large enough allow flexible leadouts pulled through guide pushed fuselage during static judging transit Locate fore aft bellcrank leadout positions relation aver age chord wing puts con trol system direct easy understand trace relationship aircrafts Center Gravity Center Pressure works almost normal shape arrangement wingsmonoplanes bi planes constant chord tapered delta etc accompanying drawing shows gen eral relationship control system average chord start own CL designs scale can find average chord models wing draw full-size plan exact locations control system components can determined model bellcrank position can varied slightly necessary allow room cockpit landing gear details etc Figure 33% average chord rearward limit have moved bellcrank much 2 ahead point no ill effects Mount bellcrank least /s thick plywood 5-ply 3-ply accord ing manufacturers instructions center leadout group should slightly behind 33% average chord point isnt necessary have adjustable leadouts get general location Spacing between leadouts isnt really critical Some CL stunt designs have leadouts right top other others have anywhere tween leadouts avoid chance line connectors becoming tangled suggest spacing leadouts 3-line system shown drawing best build separate moveable aileron rudder surfaces rather using drawn ink facsimilies maximum scale points model can fully flight trimmable Depending upon factors some degree aileron de flection may needed get model fly shoulder height wings perfectly level Use about 1 2 ounces outboard wingtip weight rudder should offset out side flight circle normal CL models Right engine offset isnt normally used scale model usually impossible build model being detectable nose contours isnt really needed larger size scale model smaller lighter sport model Westland Whirlwind Story fullscale military aviation history Westland Whirlwind has distinction being 104 Model Aviation new LAssIC kit FLYLINI 11/2 scaLe GREATLAKES Trainer 40 span 09-25 power 4 channels nc 5 complete catalog 25 FLYLINE MODELS INC 4 2820 DOAR AVENUE 52 FAIRFAX VIRGINIA 22021703 573-2030 Dont keep lending yours friend. IW 4W BUY HIM HIS OWN SULLIVAN STARTER FOR CHRISTMAS Superstar Starters . perfect gift modeler cially keeps borrowing Sullivan starter Has higher torque & RPMs heavy duty long life motor instant-on strip switch safety hand guard two year guarantee original everyone else tries copy buddy will find real turn-on Christmas P R 0 D U C T S N C SVILLE ROAD OW GROVE PA 19000 215 659-3000 first single-seat twin-engined fighter see service air force major power first flown 1938 very effective part British fighter strength during early years WW2 Its initial role long-range es court fighter night fighter Later ex amples often called Whirlihombers employed low-level cross-channel fighter-bomber sorties attacking shipping railroads bridges harbor facilities Highly maneuverable all-metal Whirl winds speed low altitudes great its contemporary fighters its range superior Power two 885hp Rolls-Royce Peregrine engines wingspan 45 feet Unfortunately air fields Whirlwind could use restricted its high landing speed 80 mph Four 20-mm cannons grouped nose yielded enormous accurate concentration firepower Whirli bomber versions could also carry bomb load 500 pounds Dick Scorgins CL model Whirlwind realistically cap tures spirit unique aircraft Mike Gretz Box 162 Montezuma IA 50171 Indoor WC/Harlan continued page 47 room abuse intent rule Practice day Saturday opened 60-degree temperature heavy over cast broke off midday give us warming sun fliers began make flights mid-30s drift incon sistent part hangar another no well-defined pattern Fortunately very little side drift As temperature rose did times best posted after 700 Wolthoorn Netherlands 3717 Butty Switzerland 3850 Bud Romak joined 40-minute FAI club 4112 followed 4138 manager Erv Rodemsky worked closely together find just right power combination quickly came obvious new Pirelli necessity everyone else also US team practiced cautiously Bill Hulbert several flights mid-30s Dan Domina three over 36/2 Jim Richmond put models halfway up-and saw 34s 35s Everyone satisfied Sunday morning arose cloudless sky very light ground fog shrouded Cardington would burn off 1100 62 degrees inside hangar floor level began practice Bill Dan posted mid-25s getting 80 100 feet Jim tested little writing advertisers mention read about MA zing put model top eight minutes ballooned successfully dropped 30 feet finished 4 150 contest started 1100 eight hours initiate nine flights little time waste waited little weather clear Jim stressed need two conservative first flights team member get us solidly board Bill offered go first started 1900 turns landed safely 3439 Dan next too put model just above 100 feet However motor walked off front hook bunched rear model stalled down 100 feet time 2314 visibly upset Dan rightfully Ron Green United Kingdom pow ered first flight top 615 discussion steering rule man agers meeting jury said didnt want see models blasted roof No fixed time set comments effect eight minutes normal peak met general agree ment Green forced balloon touched girder steering balloon exploded destroying model ended concern over steering rule tent flight least Early contest unbelievable tragedy struck Dieter Siebenmann Switzerland opened box propel lers pigeon searching food landed destroyed four propellers January 1979 105 string cant freed However question competitor allowed steer remained judgemental left