W Getting together designers theme approach somewhat large impressive CL stunter all-weather flying 46 power U Text Larry Kruse U Design Steve Johnson ONE OF THE appealing qualities control-line stunt flying its dedication precision pilots skill judges assessment skill inherent ability plane perform flight man euvers qualitative contributions precision evident plane takes air same dedication precision begins long before plane airborne actually occurring first preliminary doodles sketches issuing mind designer contemplates embryonic stunter designers contemplations must clude consideration three qualities trim weight alignmentand necessity getting together Beyond simply formulating pleasing out line workable moments designer must come up trimmable airplane can adjusted various flying conditions still perform consistently Such elements adjustable rudder ad justable lead-outs adjustable tip weight removeable tank definite inclusions trimmable ship Weight also primary importance airplane must light accept able wing loading will difficult trim will fly sluggishly An optimum wing loading 075 oz per sq good target shoot Algebraically formula computing total weight Wing LoadingWeightArea projected wing area 700 squares would allow total weight 525 oz balsa quality weight inconsistent present piece must selected extreme care weighed total weight plane kept mind Likewise alignment crucial build ing contest-worthy ship step building procedure must done care toward eliminating misalignment warps slightly misaligned stab warped fuselage wing will work against trimming plane make difficult impossible fly degree consistency Thus TWA trim weight alignment should first consid erations developing precision aerobatic craft Steve Johnston has gotten three elements together Together IV evolutionary design began 1971 has refined constantly since gether IV large airplane intended impressive capable flying condi tions ranging dead calm high winds As example Steve flew Together IV Council Bluffs Iowa wind blew hard eight 29 contestants wrecked ships Together IV finished first Two weeks later Steve flew St Louis 93 degree heat no wind Again plane finished first ships contest record notable January 1978 41 Co Opposite page Decked out Centennial colorsstill excellent color schemethe 700 sq Together passes critical inspection Top Left Steve Johnson puts well-tried stunter through patternin first two seasons 12 firsts five seconds four thirds twice qualifier FAI Finals Above Jack Ronning holds Steve flips life inverted Supertigre 4& Pipe tool box two seasons its won 12 firsts five seconds four thirds qualified both years FAI team finals Construction Since total precision align ment depends fuselage construction begin drawing fuselage side /8 X 4 X 48 sheet balsa Scribe line down center sheet 36-in steel straightedge line will wing centerline other lines drawn will drawn reference Stack sheet onto another using Exacto knife straightedge cut out both sides together Cut sides within sheet dont use edge sheet since warps could present Once both sides cut out draw wing centerline unmarked side centerlines will used later wing installed 0 incidence Laminate 1 / 16 plywood doublers both sides epoxy 3/8 X 1/2 maple motor mounts Using carpenters square right triangle join fuselage sides 1/8 ply firewall 1/8 ply bulkhead front wing mount Draw straight line workbench place fuselage squarely over pulling rear fuselage together mak ing sure exactly straight rear fuselage dry add remainder bulkheads maple motor mounts should drilled out accommodate engine mount ing bolts blind nuts Rough out top bottom fuselage blocks carefully carve hollow finished shape nose ring cowling must carved accept engine process best done engine installed sure cover exhaust venturi openings keep out dust debris uniflow tank Nobler type muffler pressure piped way uni flow tube mounted through firewall box holds tank securely does transmit engine harmonics Mounted such fashion tank removeable repair no need unsightly cowling piece attached bottom tank compartment tail units designed lightness flex resistance core rudder stab both 1/4 balsa sheet centers cut out per plans Top bottoms 1/16 balsa 1/16 X 1/4 cap strip material serving ribs both rudder stabilizer construction should 10-20% lighter full sheet select core wood carefully make certain everything pinned down until its absolutely dry eliminate warps An all-wood built-up wing shown plans constructed warp-free perfectly acceptable However two other choices available form allfoam foam rib wing both available Foam Flite Models 828 W 6th Mankato MN 56001 reasonable cost can order Shark 45 wing modify fit can send rib tem plates top view Together IV wing will cut specifica tions choose built-up wing use glue sparingly epoxy joints hard wood plywood used wing basic C tube leading edges trailing edges center section planked ribs 1 / 16 light medium weight balsa except center section ribs holding main landing gear cut 1/8 hard balsa control system ought bushed longevity dual large Veco #6779 bellcrank two bellcranks bolted together bushed mounted plywood plate pushrods must braced pass through fuselage bulkheads prevent flexing high-G turns Final assembly should reflect same degree attention accuracy has governed stage construction thus far As stab wing inserted glued place block up wing stab tip make certain alignment does change during drying curing process Also measuring identical locations wing LE both sides nose ring TE both sides tail will give indication accurate placement wing hinge-line stab hinge-line will indicate whether wing stab will work concert against other Precise alignment will pay off handsomely plane takes air Finishing Together up indi vidual modeler good light finish can obtained filleting necessary Sig Epoxilite applying three coats clear dope sanding after third coat dries surfaces including cowl gear strut covers covered Continued page 94 42 Model Aviation Tightening removable bottom cowl Steve Johnson may giving away secret snepshot shows RC-type horn left side rudderwell let run cowl removed show engine installation Note tank slides through hole firewall tab tank screwed plywood retention Tank goes tight fitting box have idea want try readers send address ap pears end column New Items Interest recently received interesting accessory PAS-M-CO 25260 153rd Southwest Kent WA 98031 Known Crash Guard Switch novel component designed interrupt electrical current electric-powered mod els anytime model assumed ready crash attitude Installed series power source longitudinal and/or lateral axis positions mercury contact breaks connection shuts power event unusual attitudes design ers quick realize Crash Guard Switch would serve equally well old-time ignition systems As indicated accompanying photo installed sample test stand mounting angle selected governs atti tude cut-out function experienced no difficulty starting engine must confess apprehensive about effects inertia deceleration case ambitious hand launch cut-out stopped engine immediately nose pointed down during sim ulated forward motion unable effect failure kind wringing out test stand did install unit ships unwilling put model crash eminent attitude under power have knowledge old-time modeler Crash Guard Switch installed Playboy Senior although has no trouble also has need switch function criticism unit single-strand copper ter minals connectors may subject vibration failures should effec tively alleviated adequately securing connecting wires aircraft structure epoxy glue Crash Guard switch has potential saving new models intend install next ship during initial trimming procedure remove ship safely fly ing Another new item cross bench product known Super RPM produced Lube Specialties Inc 1152 West Ninth St Upland CA 91786 As stated Lube Specialties Super RPM consists neutral carrier twenty percent disper sion teflon beadlets originally formulated aerospace industry has recently become available general use After reading instruction sheet fired up old O&R 60 FRV 12-6 prop using 4-1 fuel mixture gasoline SAE-70 oil tack showed 7500 rpm allowed engine cool squirted 3-4 drops Super RPM directly exhaust port directed flipped engine over coat cylinder piston Two drops per ounce added fuel mixture engine restarted tacked 7800 rpm increase 300 rpm would take extensive testing deter undesirable long range charac teristics develop certainly appears what Jean Andrews claims will Should help old engines get up conversions Incidentally product conducts electricity will short out points Clarence Haught Rt S Box 16 Coeur dAlene ID 83814 Tog ether/J ohnston/Kruse continued page 42 00 Silkspan helps consider ably fill grain Two coats clear will keep fuzz down Silkspan allow equal three-part mixture clear talcum powder thinner brushed sanded off times necessary fill paper certain sand coat well after dries remove dope/talc/thinner mix ture except stays grain nicks crevices After grain filled brush spray two addi tional coats clear seal filler wet everything 400 wet dry youre satisfied point youre ready color coats Heres weight can really added hurry use color sparingly spray thinned least 50% make sure adheres flows well Always spray lighter colors first followed successively darker colors proto typewas bicentennial red white blue although Togethers lines lend selves variation color scheme trim Flying Together proof alignment weight trim considerations pay off plane incorporates enough trim adjustments compensate weather flight conditions Dont afraid make adjustments means adding weight nose tail Bob Lampione Lew McFarland Gene Schaffer other top stunt fliers have written extensively trimming offer some good advice trying break winners circle Any information can gather other sources addi tion own experience practice will help immensely getting Together FF Indoor/Tenny continued page 39 attempts Can microfilm models trained survive poor air will also help improve good air perfor mance Certainly heavy drift extreme conditions such Stan sought out cannot useful instructive seri ous indoor flier However has noted certain kinds model trim seem enable models drift less High dynamic stability does minimize altitude loss light turbulence Starting two points much improvement can make thing sure almost Indoor World Championship recent times has its share poor air 94 Model Aviation NEW FINISHING TOOL CURVED MICROBLADE PROTECTS MODELCOVER LETSYOU CARRY VTRIMIT IN YOUR POCKET irir Special Award High Time DeLong 30 crafted Don Jenkins presented Clarence Bull 15-minute flight Such unique awards nice part Old-Timer
Edition: Model Aviation - 1978/01
Page Numbers: 40, 41, 42, 94
Edition: Model Aviation - 1978/01
Page Numbers: 40, 41, 42, 94
W Getting together designers theme approach somewhat large impressive CL stunter all-weather flying 46 power U Text Larry Kruse U Design Steve Johnson ONE OF THE appealing qualities control-line stunt flying its dedication precision pilots skill judges assessment skill inherent ability plane perform flight man euvers qualitative contributions precision evident plane takes air same dedication precision begins long before plane airborne actually occurring first preliminary doodles sketches issuing mind designer contemplates embryonic stunter designers contemplations must clude consideration three qualities trim weight alignmentand necessity getting together Beyond simply formulating pleasing out line workable moments designer must come up trimmable airplane can adjusted various flying conditions still perform consistently Such elements adjustable rudder ad justable lead-outs adjustable tip weight removeable tank definite inclusions trimmable ship Weight also primary importance airplane must light accept able wing loading will difficult trim will fly sluggishly An optimum wing loading 075 oz per sq good target shoot Algebraically formula computing total weight Wing LoadingWeightArea projected wing area 700 squares would allow total weight 525 oz balsa quality weight inconsistent present piece must selected extreme care weighed total weight plane kept mind Likewise alignment crucial build ing contest-worthy ship step building procedure must done care toward eliminating misalignment warps slightly misaligned stab warped fuselage wing will work against trimming plane make difficult impossible fly degree consistency Thus TWA trim weight alignment should first consid erations developing precision aerobatic craft Steve Johnston has gotten three elements together Together IV evolutionary design began 1971 has refined constantly since gether IV large airplane intended impressive capable flying condi tions ranging dead calm high winds As example Steve flew Together IV Council Bluffs Iowa wind blew hard eight 29 contestants wrecked ships Together IV finished first Two weeks later Steve flew St Louis 93 degree heat no wind Again plane finished first ships contest record notable January 1978 41 Co Opposite page Decked out Centennial colorsstill excellent color schemethe 700 sq Together passes critical inspection Top Left Steve Johnson puts well-tried stunter through patternin first two seasons 12 firsts five seconds four thirds twice qualifier FAI Finals Above Jack Ronning holds Steve flips life inverted Supertigre 4& Pipe tool box two seasons its won 12 firsts five seconds four thirds qualified both years FAI team finals Construction Since total precision align ment depends fuselage construction begin drawing fuselage side /8 X 4 X 48 sheet balsa Scribe line down center sheet 36-in steel straightedge line will wing centerline other lines drawn will drawn reference Stack sheet onto another using Exacto knife straightedge cut out both sides together Cut sides within sheet dont use edge sheet since warps could present Once both sides cut out draw wing centerline unmarked side centerlines will used later wing installed 0 incidence Laminate 1 / 16 plywood doublers both sides epoxy 3/8 X 1/2 maple motor mounts Using carpenters square right triangle join fuselage sides 1/8 ply firewall 1/8 ply bulkhead front wing mount Draw straight line workbench place fuselage squarely over pulling rear fuselage together mak ing sure exactly straight rear fuselage dry add remainder bulkheads maple motor mounts should drilled out accommodate engine mount ing bolts blind nuts Rough out top bottom fuselage blocks carefully carve hollow finished shape nose ring cowling must carved accept engine process best done engine installed sure cover exhaust venturi openings keep out dust debris uniflow tank Nobler type muffler pressure piped way uni flow tube mounted through firewall box holds tank securely does transmit engine harmonics Mounted such fashion tank removeable repair no need unsightly cowling piece attached bottom tank compartment tail units designed lightness flex resistance core rudder stab both 1/4 balsa sheet centers cut out per plans Top bottoms 1/16 balsa 1/16 X 1/4 cap strip material serving ribs both rudder stabilizer construction should 10-20% lighter full sheet select core wood carefully make certain everything pinned down until its absolutely dry eliminate warps An all-wood built-up wing shown plans constructed warp-free perfectly acceptable However two other choices available form allfoam foam rib wing both available Foam Flite Models 828 W 6th Mankato MN 56001 reasonable cost can order Shark 45 wing modify fit can send rib tem plates top view Together IV wing will cut specifica tions choose built-up wing use glue sparingly epoxy joints hard wood plywood used wing basic C tube leading edges trailing edges center section planked ribs 1 / 16 light medium weight balsa except center section ribs holding main landing gear cut 1/8 hard balsa control system ought bushed longevity dual large Veco #6779 bellcrank two bellcranks bolted together bushed mounted plywood plate pushrods must braced pass through fuselage bulkheads prevent flexing high-G turns Final assembly should reflect same degree attention accuracy has governed stage construction thus far As stab wing inserted glued place block up wing stab tip make certain alignment does change during drying curing process Also measuring identical locations wing LE both sides nose ring TE both sides tail will give indication accurate placement wing hinge-line stab hinge-line will indicate whether wing stab will work concert against other Precise alignment will pay off handsomely plane takes air Finishing Together up indi vidual modeler good light finish can obtained filleting necessary Sig Epoxilite applying three coats clear dope sanding after third coat dries surfaces including cowl gear strut covers covered Continued page 94 42 Model Aviation Tightening removable bottom cowl Steve Johnson may giving away secret snepshot shows RC-type horn left side rudderwell let run cowl removed show engine installation Note tank slides through hole firewall tab tank screwed plywood retention Tank goes tight fitting box have idea want try readers send address ap pears end column New Items Interest recently received interesting accessory PAS-M-CO 25260 153rd Southwest Kent WA 98031 Known Crash Guard Switch novel component designed interrupt electrical current electric-powered mod els anytime model assumed ready crash attitude Installed series power source longitudinal and/or lateral axis positions mercury contact breaks connection shuts power event unusual attitudes design ers quick realize Crash Guard Switch would serve equally well old-time ignition systems As indicated accompanying photo installed sample test stand mounting angle selected governs atti tude cut-out function experienced no difficulty starting engine must confess apprehensive about effects inertia deceleration case ambitious hand launch cut-out stopped engine immediately nose pointed down during sim ulated forward motion unable effect failure kind wringing out test stand did install unit ships unwilling put model crash eminent attitude under power have knowledge old-time modeler Crash Guard Switch installed Playboy Senior although has no trouble also has need switch function criticism unit single-strand copper ter minals connectors may subject vibration failures should effec tively alleviated adequately securing connecting wires aircraft structure epoxy glue Crash Guard switch has potential saving new models intend install next ship during initial trimming procedure remove ship safely fly ing Another new item cross bench product known Super RPM produced Lube Specialties Inc 1152 West Ninth St Upland CA 91786 As stated Lube Specialties Super RPM consists neutral carrier twenty percent disper sion teflon beadlets originally formulated aerospace industry has recently become available general use After reading instruction sheet fired up old O&R 60 FRV 12-6 prop using 4-1 fuel mixture gasoline SAE-70 oil tack showed 7500 rpm allowed engine cool squirted 3-4 drops Super RPM directly exhaust port directed flipped engine over coat cylinder piston Two drops per ounce added fuel mixture engine restarted tacked 7800 rpm increase 300 rpm would take extensive testing deter undesirable long range charac teristics develop certainly appears what Jean Andrews claims will Should help old engines get up conversions Incidentally product conducts electricity will short out points Clarence Haught Rt S Box 16 Coeur dAlene ID 83814 Tog ether/J ohnston/Kruse continued page 42 00 Silkspan helps consider ably fill grain Two coats clear will keep fuzz down Silkspan allow equal three-part mixture clear talcum powder thinner brushed sanded off times necessary fill paper certain sand coat well after dries remove dope/talc/thinner mix ture except stays grain nicks crevices After grain filled brush spray two addi tional coats clear seal filler wet everything 400 wet dry youre satisfied point youre ready color coats Heres weight can really added hurry use color sparingly spray thinned least 50% make sure adheres flows well Always spray lighter colors first followed successively darker colors proto typewas bicentennial red white blue although Togethers lines lend selves variation color scheme trim Flying Together proof alignment weight trim considerations pay off plane incorporates enough trim adjustments compensate weather flight conditions Dont afraid make adjustments means adding weight nose tail Bob Lampione Lew McFarland Gene Schaffer other top stunt fliers have written extensively trimming offer some good advice trying break winners circle Any information can gather other sources addi tion own experience practice will help immensely getting Together FF Indoor/Tenny continued page 39 attempts Can microfilm models trained survive poor air will also help improve good air perfor mance Certainly heavy drift extreme conditions such Stan sought out cannot useful instructive seri ous indoor flier However has noted certain kinds model trim seem enable models drift less High dynamic stability does minimize altitude loss light turbulence Starting two points much improvement can make thing sure almost Indoor World Championship recent times has its share poor air 94 Model Aviation NEW FINISHING TOOL CURVED MICROBLADE PROTECTS MODELCOVER LETSYOU CARRY VTRIMIT IN YOUR POCKET irir Special Award High Time DeLong 30 crafted Don Jenkins presented Clarence Bull 15-minute flight Such unique awards nice part Old-Timer
Edition: Model Aviation - 1978/01
Page Numbers: 40, 41, 42, 94
W Getting together designers theme approach somewhat large impressive CL stunter all-weather flying 46 power U Text Larry Kruse U Design Steve Johnson ONE OF THE appealing qualities control-line stunt flying its dedication precision pilots skill judges assessment skill inherent ability plane perform flight man euvers qualitative contributions precision evident plane takes air same dedication precision begins long before plane airborne actually occurring first preliminary doodles sketches issuing mind designer contemplates embryonic stunter designers contemplations must clude consideration three qualities trim weight alignmentand necessity getting together Beyond simply formulating pleasing out line workable moments designer must come up trimmable airplane can adjusted various flying conditions still perform consistently Such elements adjustable rudder ad justable lead-outs adjustable tip weight removeable tank definite inclusions trimmable ship Weight also primary importance airplane must light accept able wing loading will difficult trim will fly sluggishly An optimum wing loading 075 oz per sq good target shoot Algebraically formula computing total weight Wing LoadingWeightArea projected wing area 700 squares would allow total weight 525 oz balsa quality weight inconsistent present piece must selected extreme care weighed total weight plane kept mind Likewise alignment crucial build ing contest-worthy ship step building procedure must done care toward eliminating misalignment warps slightly misaligned stab warped fuselage wing will work against trimming plane make difficult impossible fly degree consistency Thus TWA trim weight alignment should first consid erations developing precision aerobatic craft Steve Johnston has gotten three elements together Together IV evolutionary design began 1971 has refined constantly since gether IV large airplane intended impressive capable flying condi tions ranging dead calm high winds As example Steve flew Together IV Council Bluffs Iowa wind blew hard eight 29 contestants wrecked ships Together IV finished first Two weeks later Steve flew St Louis 93 degree heat no wind Again plane finished first ships contest record notable January 1978 41 Co Opposite page Decked out Centennial colorsstill excellent color schemethe 700 sq Together passes critical inspection Top Left Steve Johnson puts well-tried stunter through patternin first two seasons 12 firsts five seconds four thirds twice qualifier FAI Finals Above Jack Ronning holds Steve flips life inverted Supertigre 4& Pipe tool box two seasons its won 12 firsts five seconds four thirds qualified both years FAI team finals Construction Since total precision align ment depends fuselage construction begin drawing fuselage side /8 X 4 X 48 sheet balsa Scribe line down center sheet 36-in steel straightedge line will wing centerline other lines drawn will drawn reference Stack sheet onto another using Exacto knife straightedge cut out both sides together Cut sides within sheet dont use edge sheet since warps could present Once both sides cut out draw wing centerline unmarked side centerlines will used later wing installed 0 incidence Laminate 1 / 16 plywood doublers both sides epoxy 3/8 X 1/2 maple motor mounts Using carpenters square right triangle join fuselage sides 1/8 ply firewall 1/8 ply bulkhead front wing mount Draw straight line workbench place fuselage squarely over pulling rear fuselage together mak ing sure exactly straight rear fuselage dry add remainder bulkheads maple motor mounts should drilled out accommodate engine mount ing bolts blind nuts Rough out top bottom fuselage blocks carefully carve hollow finished shape nose ring cowling must carved accept engine process best done engine installed sure cover exhaust venturi openings keep out dust debris uniflow tank Nobler type muffler pressure piped way uni flow tube mounted through firewall box holds tank securely does transmit engine harmonics Mounted such fashion tank removeable repair no need unsightly cowling piece attached bottom tank compartment tail units designed lightness flex resistance core rudder stab both 1/4 balsa sheet centers cut out per plans Top bottoms 1/16 balsa 1/16 X 1/4 cap strip material serving ribs both rudder stabilizer construction should 10-20% lighter full sheet select core wood carefully make certain everything pinned down until its absolutely dry eliminate warps An all-wood built-up wing shown plans constructed warp-free perfectly acceptable However two other choices available form allfoam foam rib wing both available Foam Flite Models 828 W 6th Mankato MN 56001 reasonable cost can order Shark 45 wing modify fit can send rib tem plates top view Together IV wing will cut specifica tions choose built-up wing use glue sparingly epoxy joints hard wood plywood used wing basic C tube leading edges trailing edges center section planked ribs 1 / 16 light medium weight balsa except center section ribs holding main landing gear cut 1/8 hard balsa control system ought bushed longevity dual large Veco #6779 bellcrank two bellcranks bolted together bushed mounted plywood plate pushrods must braced pass through fuselage bulkheads prevent flexing high-G turns Final assembly should reflect same degree attention accuracy has governed stage construction thus far As stab wing inserted glued place block up wing stab tip make certain alignment does change during drying curing process Also measuring identical locations wing LE both sides nose ring TE both sides tail will give indication accurate placement wing hinge-line stab hinge-line will indicate whether wing stab will work concert against other Precise alignment will pay off handsomely plane takes air Finishing Together up indi vidual modeler good light finish can obtained filleting necessary Sig Epoxilite applying three coats clear dope sanding after third coat dries surfaces including cowl gear strut covers covered Continued page 94 42 Model Aviation Tightening removable bottom cowl Steve Johnson may giving away secret snepshot shows RC-type horn left side rudderwell let run cowl removed show engine installation Note tank slides through hole firewall tab tank screwed plywood retention Tank goes tight fitting box have idea want try readers send address ap pears end column New Items Interest recently received interesting accessory PAS-M-CO 25260 153rd Southwest Kent WA 98031 Known Crash Guard Switch novel component designed interrupt electrical current electric-powered mod els anytime model assumed ready crash attitude Installed series power source longitudinal and/or lateral axis positions mercury contact breaks connection shuts power event unusual attitudes design ers quick realize Crash Guard Switch would serve equally well old-time ignition systems As indicated accompanying photo installed sample test stand mounting angle selected governs atti tude cut-out function experienced no difficulty starting engine must confess apprehensive about effects inertia deceleration case ambitious hand launch cut-out stopped engine immediately nose pointed down during sim ulated forward motion unable effect failure kind wringing out test stand did install unit ships unwilling put model crash eminent attitude under power have knowledge old-time modeler Crash Guard Switch installed Playboy Senior although has no trouble also has need switch function criticism unit single-strand copper ter minals connectors may subject vibration failures should effec tively alleviated adequately securing connecting wires aircraft structure epoxy glue Crash Guard switch has potential saving new models intend install next ship during initial trimming procedure remove ship safely fly ing Another new item cross bench product known Super RPM produced Lube Specialties Inc 1152 West Ninth St Upland CA 91786 As stated Lube Specialties Super RPM consists neutral carrier twenty percent disper sion teflon beadlets originally formulated aerospace industry has recently become available general use After reading instruction sheet fired up old O&R 60 FRV 12-6 prop using 4-1 fuel mixture gasoline SAE-70 oil tack showed 7500 rpm allowed engine cool squirted 3-4 drops Super RPM directly exhaust port directed flipped engine over coat cylinder piston Two drops per ounce added fuel mixture engine restarted tacked 7800 rpm increase 300 rpm would take extensive testing deter undesirable long range charac teristics develop certainly appears what Jean Andrews claims will Should help old engines get up conversions Incidentally product conducts electricity will short out points Clarence Haught Rt S Box 16 Coeur dAlene ID 83814 Tog ether/J ohnston/Kruse continued page 42 00 Silkspan helps consider ably fill grain Two coats clear will keep fuzz down Silkspan allow equal three-part mixture clear talcum powder thinner brushed sanded off times necessary fill paper certain sand coat well after dries remove dope/talc/thinner mix ture except stays grain nicks crevices After grain filled brush spray two addi tional coats clear seal filler wet everything 400 wet dry youre satisfied point youre ready color coats Heres weight can really added hurry use color sparingly spray thinned least 50% make sure adheres flows well Always spray lighter colors first followed successively darker colors proto typewas bicentennial red white blue although Togethers lines lend selves variation color scheme trim Flying Together proof alignment weight trim considerations pay off plane incorporates enough trim adjustments compensate weather flight conditions Dont afraid make adjustments means adding weight nose tail Bob Lampione Lew McFarland Gene Schaffer other top stunt fliers have written extensively trimming offer some good advice trying break winners circle Any information can gather other sources addi tion own experience practice will help immensely getting Together FF Indoor/Tenny continued page 39 attempts Can microfilm models trained survive poor air will also help improve good air perfor mance Certainly heavy drift extreme conditions such Stan sought out cannot useful instructive seri ous indoor flier However has noted certain kinds model trim seem enable models drift less High dynamic stability does minimize altitude loss light turbulence Starting two points much improvement can make thing sure almost Indoor World Championship recent times has its share poor air 94 Model Aviation NEW FINISHING TOOL CURVED MICROBLADE PROTECTS MODELCOVER LETSYOU CARRY VTRIMIT IN YOUR POCKET irir Special Award High Time DeLong 30 crafted Don Jenkins presented Clarence Bull 15-minute flight Such unique awards nice part Old-Timer
Edition: Model Aviation - 1978/01
Page Numbers: 40, 41, 42, 94
W Getting together designers theme approach somewhat large impressive CL stunter all-weather flying 46 power U Text Larry Kruse U Design Steve Johnson ONE OF THE appealing qualities control-line stunt flying its dedication precision pilots skill judges assessment skill inherent ability plane perform flight man euvers qualitative contributions precision evident plane takes air same dedication precision begins long before plane airborne actually occurring first preliminary doodles sketches issuing mind designer contemplates embryonic stunter designers contemplations must clude consideration three qualities trim weight alignmentand necessity getting together Beyond simply formulating pleasing out line workable moments designer must come up trimmable airplane can adjusted various flying conditions still perform consistently Such elements adjustable rudder ad justable lead-outs adjustable tip weight removeable tank definite inclusions trimmable ship Weight also primary importance airplane must light accept able wing loading will difficult trim will fly sluggishly An optimum wing loading 075 oz per sq good target shoot Algebraically formula computing total weight Wing LoadingWeightArea projected wing area 700 squares would allow total weight 525 oz balsa quality weight inconsistent present piece must selected extreme care weighed total weight plane kept mind Likewise alignment crucial build ing contest-worthy ship step building procedure must done care toward eliminating misalignment warps slightly misaligned stab warped fuselage wing will work against trimming plane make difficult impossible fly degree consistency Thus TWA trim weight alignment should first consid erations developing precision aerobatic craft Steve Johnston has gotten three elements together Together IV evolutionary design began 1971 has refined constantly since gether IV large airplane intended impressive capable flying condi tions ranging dead calm high winds As example Steve flew Together IV Council Bluffs Iowa wind blew hard eight 29 contestants wrecked ships Together IV finished first Two weeks later Steve flew St Louis 93 degree heat no wind Again plane finished first ships contest record notable January 1978 41 Co Opposite page Decked out Centennial colorsstill excellent color schemethe 700 sq Together passes critical inspection Top Left Steve Johnson puts well-tried stunter through patternin first two seasons 12 firsts five seconds four thirds twice qualifier FAI Finals Above Jack Ronning holds Steve flips life inverted Supertigre 4& Pipe tool box two seasons its won 12 firsts five seconds four thirds qualified both years FAI team finals Construction Since total precision align ment depends fuselage construction begin drawing fuselage side /8 X 4 X 48 sheet balsa Scribe line down center sheet 36-in steel straightedge line will wing centerline other lines drawn will drawn reference Stack sheet onto another using Exacto knife straightedge cut out both sides together Cut sides within sheet dont use edge sheet since warps could present Once both sides cut out draw wing centerline unmarked side centerlines will used later wing installed 0 incidence Laminate 1 / 16 plywood doublers both sides epoxy 3/8 X 1/2 maple motor mounts Using carpenters square right triangle join fuselage sides 1/8 ply firewall 1/8 ply bulkhead front wing mount Draw straight line workbench place fuselage squarely over pulling rear fuselage together mak ing sure exactly straight rear fuselage dry add remainder bulkheads maple motor mounts should drilled out accommodate engine mount ing bolts blind nuts Rough out top bottom fuselage blocks carefully carve hollow finished shape nose ring cowling must carved accept engine process best done engine installed sure cover exhaust venturi openings keep out dust debris uniflow tank Nobler type muffler pressure piped way uni flow tube mounted through firewall box holds tank securely does transmit engine harmonics Mounted such fashion tank removeable repair no need unsightly cowling piece attached bottom tank compartment tail units designed lightness flex resistance core rudder stab both 1/4 balsa sheet centers cut out per plans Top bottoms 1/16 balsa 1/16 X 1/4 cap strip material serving ribs both rudder stabilizer construction should 10-20% lighter full sheet select core wood carefully make certain everything pinned down until its absolutely dry eliminate warps An all-wood built-up wing shown plans constructed warp-free perfectly acceptable However two other choices available form allfoam foam rib wing both available Foam Flite Models 828 W 6th Mankato MN 56001 reasonable cost can order Shark 45 wing modify fit can send rib tem plates top view Together IV wing will cut specifica tions choose built-up wing use glue sparingly epoxy joints hard wood plywood used wing basic C tube leading edges trailing edges center section planked ribs 1 / 16 light medium weight balsa except center section ribs holding main landing gear cut 1/8 hard balsa control system ought bushed longevity dual large Veco #6779 bellcrank two bellcranks bolted together bushed mounted plywood plate pushrods must braced pass through fuselage bulkheads prevent flexing high-G turns Final assembly should reflect same degree attention accuracy has governed stage construction thus far As stab wing inserted glued place block up wing stab tip make certain alignment does change during drying curing process Also measuring identical locations wing LE both sides nose ring TE both sides tail will give indication accurate placement wing hinge-line stab hinge-line will indicate whether wing stab will work concert against other Precise alignment will pay off handsomely plane takes air Finishing Together up indi vidual modeler good light finish can obtained filleting necessary Sig Epoxilite applying three coats clear dope sanding after third coat dries surfaces including cowl gear strut covers covered Continued page 94 42 Model Aviation Tightening removable bottom cowl Steve Johnson may giving away secret snepshot shows RC-type horn left side rudderwell let run cowl removed show engine installation Note tank slides through hole firewall tab tank screwed plywood retention Tank goes tight fitting box have idea want try readers send address ap pears end column New Items Interest recently received interesting accessory PAS-M-CO 25260 153rd Southwest Kent WA 98031 Known Crash Guard Switch novel component designed interrupt electrical current electric-powered mod els anytime model assumed ready crash attitude Installed series power source longitudinal and/or lateral axis positions mercury contact breaks connection shuts power event unusual attitudes design ers quick realize Crash Guard Switch would serve equally well old-time ignition systems As indicated accompanying photo installed sample test stand mounting angle selected governs atti tude cut-out function experienced no difficulty starting engine must confess apprehensive about effects inertia deceleration case ambitious hand launch cut-out stopped engine immediately nose pointed down during sim ulated forward motion unable effect failure kind wringing out test stand did install unit ships unwilling put model crash eminent attitude under power have knowledge old-time modeler Crash Guard Switch installed Playboy Senior although has no trouble also has need switch function criticism unit single-strand copper ter minals connectors may subject vibration failures should effec tively alleviated adequately securing connecting wires aircraft structure epoxy glue Crash Guard switch has potential saving new models intend install next ship during initial trimming procedure remove ship safely fly ing Another new item cross bench product known Super RPM produced Lube Specialties Inc 1152 West Ninth St Upland CA 91786 As stated Lube Specialties Super RPM consists neutral carrier twenty percent disper sion teflon beadlets originally formulated aerospace industry has recently become available general use After reading instruction sheet fired up old O&R 60 FRV 12-6 prop using 4-1 fuel mixture gasoline SAE-70 oil tack showed 7500 rpm allowed engine cool squirted 3-4 drops Super RPM directly exhaust port directed flipped engine over coat cylinder piston Two drops per ounce added fuel mixture engine restarted tacked 7800 rpm increase 300 rpm would take extensive testing deter undesirable long range charac teristics develop certainly appears what Jean Andrews claims will Should help old engines get up conversions Incidentally product conducts electricity will short out points Clarence Haught Rt S Box 16 Coeur dAlene ID 83814 Tog ether/J ohnston/Kruse continued page 42 00 Silkspan helps consider ably fill grain Two coats clear will keep fuzz down Silkspan allow equal three-part mixture clear talcum powder thinner brushed sanded off times necessary fill paper certain sand coat well after dries remove dope/talc/thinner mix ture except stays grain nicks crevices After grain filled brush spray two addi tional coats clear seal filler wet everything 400 wet dry youre satisfied point youre ready color coats Heres weight can really added hurry use color sparingly spray thinned least 50% make sure adheres flows well Always spray lighter colors first followed successively darker colors proto typewas bicentennial red white blue although Togethers lines lend selves variation color scheme trim Flying Together proof alignment weight trim considerations pay off plane incorporates enough trim adjustments compensate weather flight conditions Dont afraid make adjustments means adding weight nose tail Bob Lampione Lew McFarland Gene Schaffer other top stunt fliers have written extensively trimming offer some good advice trying break winners circle Any information can gather other sources addi tion own experience practice will help immensely getting Together FF Indoor/Tenny continued page 39 attempts Can microfilm models trained survive poor air will also help improve good air perfor mance Certainly heavy drift extreme conditions such Stan sought out cannot useful instructive seri ous indoor flier However has noted certain kinds model trim seem enable models drift less High dynamic stability does minimize altitude loss light turbulence Starting two points much improvement can make thing sure almost Indoor World Championship recent times has its share poor air 94 Model Aviation NEW FINISHING TOOL CURVED MICROBLADE PROTECTS MODELCOVER LETSYOU CARRY VTRIMIT IN YOUR POCKET irir Special Award High Time DeLong 30 crafted Don Jenkins presented Clarence Bull 15-minute flight Such unique awards nice part Old-Timer
