THROUGH THE YEARS control-line stunt has provided author hours pleasure both construction long line models thou sands patterns flown ever-present challenge make intersections keep proper elevations turn radius provides incentive practice harder develop better designs good competitive-level flight pattern requires good airplane so-called stunters set back state art discourage potentially good fliers improve flying skills properly designed constructed stunter will settle groove requires little no thought flying modei allowing full concentration perfecting maneuvers flier busy flghtiig unstable over-sensitive under- over-powered model simply out trim chances putting accept able pattern minimal other words good model must Cardinal Sin ner good model Most stunt designs evolve long line experimental models case Cardinal Sinner entirely true previous stunters developed around partially sheeted D-tube wing construction few foam-cored wings thrown variety Moment arms began show some standardization wing areas airfoils worked up opti mum values old standby Fox 35 stunt engine constant battle weight led investigate virtues Detroiter type bird-cage wing struc ture method building wing always fascinated leery its strength apparent delicacy strip ribs protection sheeting finally gave way curiosity built Cardinal Sinner birdcage wing After flying design three years am totally satisfied its strength adequate normal care fragile important much lighter structure cannot emphasize enough impor tance keeping weight down stunter Cardinal Sinner designed use contest grade 4-6 pound per cubic foot balsa throughout exception wing leading trailing edges spar caps should firm stock Built finished recommended should give finished model around 45 ounces Im firmly convinced light model will beat heavy time especially wind heavy ships build up terrific speeds consecutive maneuv ers point being practically un controllable light ship means light power loading making engines work Purposeful pretty model displayed elevators flaps displaced 35 degreeswhich adequate Its light con struction contributes tight turning ability Although light model strong GJinaI much easier windy conditions light wing loading fights bad effects centri fugal force gravity Perhaps should mention name has no relation performance model named after Cardinals North Idaho College provides employment Building model type little different conventional stunter being sort unitized body ship builds together Maybe thats bird-cage wings called Detroiters Start building up wing spar will note plans call both wings equal span quit building outboard wing shorter several years ago found models fly fine way look much better plywood doublers top bottom center make up 22 Model Aviation large air scoop provides ample cooling Air flow regulated 1/2 x 2-1/2 exit slot Glow plug access exhaust opening metal lined Moments areas typical all-out stunt machine Slight rudder offset ia used No engine offset required Ship adequate iy powered 35 model named after Cardinals North Idaho College sound design please discriminating CL stunt pilot 35-powered model makes use Detroiter bird-cage wing structural lightness Clarence Haught strength lost belicrank clearances spar web Cut out 1/32 plywood fuselage doub lers bond 3/16 sides contact cement Cut spar leading trailing edge holes sides using doublers guide Taper sides 3/32 thickness rear sanding block add motor mounts Cut out formers bellcrank platform Clear tee shaped space build ing bench large enough accommodate wing fuselage assembly Slide fuselage sides over spar fit up formers F- 1 F-2 bellcrank platform Place assembly inverted bench over wing plan Check align ments carefully spar level fuselage square formers straight Glue securely allow adequate drying time Install temporary spacers F-3 F-4 F-5 locations join fuselage sides tail pacer Work flap horn position through trailing edge holes slide railing edge position splice should reinforced /8 plywood doubler shown plan Align trailing edge plan block up tips until perfectly level Repeat process leading edge Anchor tips spar prevent movement direction Install /s sheet wing tips aid alignment Install full length sliced ribs bottom surface wing begin ning rib Trim ribs length trailing edge As progress toward tip may need trim slight amount leading edge ribs get seat spar Add false ribs dry before moving model carefully sand ribs chordwise direction using sanding block spans least six ribs insure uniform airfoil Turn model over repeat upper wing surfaces Cement aminations place wing tips give wing finish sanding rounding leading edge shaping trailing edge shown plan Install 3 nylon bellcrank flexible leadouts Secure leadout guides bottom wing tip location shown Epoxy tip weight right wing Bird-cage wings tend little snag prone around shop uncovered state suggest giving structure couple coats clear dope covering wet GM Silkspan followed two three coats clear dope Select some light V4 stock flaps Sand shape hinge wing fitting carefully flap horn Similarly fabricate stabilizer elevator assembly tapering tips assemble paying particu lar care insure proper alignment hon zontafly laterally sure flap elevator horns select have some type bearing anchor bearing securely long life should bush pushrod holes short length brass tubing secured soldered washers side Install fuselage formers plywood pushrod guide Hook up controls using 3/32 music wire pushrods Note holes used plan low wide-stance landing gear adds grace class providing shock absorption smooth landings Often such landing gears tend sag distort crack fairings eliminate problem provide better mounting leg fairings wheel pants fabri cate reinforcement 046 music wire Bind three places copper wire shown solder main gear legs FairJuly1976 23 Cowl retained bike spoke aligned dow el rear Cowl splits needle valve preserves adjustments pictures author Cardinal Sinner ings made two pieces 3/16 x a sandwiching gear leg wheel pants built around installed wheels Solder washer axle inboard side wheel retain wheel wire retainer-pant mount Wheel pants mounted fashion extremely durable Complete landing gear through sanding stage before stalling F-2 tailwheel mount may seem little beefy has designed withstand loads imposed take-off stooge fly alone Use very light s/s balsa sheet bottom dont have proper ma terial tack glue shape remove hollow reinstall bottom permanently As begin seal up fuselage sure controls free well lubricated petroleum jelly Install 3/32 sheet turtle deck sides Sand top cap t Sand shape blending sheet fin rudder Note rudder offset Drill engine mounts favorite engine may use two degrees right offset wish Install 4-40 blind nuts Tack glue block place carve shape Remove hollow indicated Reinstall securely Build up cowl t Reinforce inside corners Y4 triangle stock have old engine construction dummy install old 2 spinner mounted care fully plug exhaust intake ports good engine install Trim interior cowl fit tack glue over engine Fit 1 / 16 plywood nose ring Sand nose model its final contours Pop off cowling install align ment dowel bike-spoke retainer ply wood reinforcement recommend lining following openings metal exhaust port glow-plug access needle-valve hole carb air intake cooling air exit may may lined Assorted brass tubing tin can stock good uses Revent 4 oz T-21 E Veco stunt tank shown mount lower edge engine mounts behind F-l Cover tank compart ment t balsa procedure allows shape nose vents being way provides easy access tank necessaiy later Give entire model light sanding fill dents scars filler Finishing stunter nearly controversial politics Ill offer method con sideration First prefer dope finishes lieve lighter easier work much easier repair last least five years adequate purposes also like use nitrate dope base because its less severe shrinking qualities its excellent bonding ability Butyrate used color coats Butyrate totally compatible over nitrate reverse true Butyrate can used throughout good results Begin applying two coats clear bare wood sanding 400 grit after coat Cover wood tissue adhered mixture 75% thinner 25% dope suggest Japanese tissue areas single curvature Just lay tissue place brush above mixture will adhere tissue wrinklefree manner Japanese tissue avail able use 00 rubber power Silkspan Cover compound curved areas 00 Silkspan dampened water spray Windex bottle adhere same manner Use pieces smaller size necessary avoid overlapping seams possible Try neat butt seams no gap Brush approximately five coats clear dope sanding lightly wellworn 400 grit 600 grit paper used dry very careful sanding over wing ribs can easily sand through Sand direction ribs Try sand between ribs rest will take care itself point apply fillets wing stabi lizer rudder fuselage intersections like micro-balloons mixed Formula Hobbypoxy best Just mix micro-balloons epoxy until workable putty formed Apply mixture bare finger Smooth approximate dimension Dip clean finger dope thinner smooth work fillet finished shape Let dry sand lightly admire No shrinking No fuss bother purpose waiting until point finish procedure keep dope build-up fillets minimum Butyrate dope never quits shrinking have thick build-up inside curve such fillet lifting usual result Any desired cockpit detail interior finish should added now covered well-fitted canopy Mask off canopy fair fuselage micro-balloons epoxy Prepare filler adding talcum powder clear dope brown gravy consistency Thin brushing apply coat wood areas except over fillets dry sand back clear leaving filler grain Spray final coat clear sanding very lightly completely dry should now ready color Apply color spray gun air brush Use just enough cover pigmented dope very heavy Allow dry two three days before masking trim can run tape through fingers re move some sticking ability less ening likelihood tape lifting base color removing masking tape apply large trim areas spray gun resort brush striping use brush trim seal edges masking tape light coat clear before applying color avoid seepage under tape After trimming lettering have applied sand raised edges lightly 600 grit paper Give model minimum six sprayed coats clear butyrate dope sure no plasticizer has added apply coats session Let dope dry well between coats Butyrate dope has tendency soften coats application hurrying step will give problems over-softening finish too deep continued page 91 Low racy appearance pleasing eye Ship takes full advantage ground cushion smooth landings Ground attitude easily adjusted bending tail-wheel wire Tail wheel securely mounted allow holding loop attached use solo flight stooge WTII WINOS EQUAL SPAN L4R U2 LEMO 50 OF IN SOLDER BIOS ONLYI0IUU OZ 1 0002 NYLON LEADYOT /TSP WT - I R SYEET ROI2 AT ORAtiNG EDGE TRIM AIRS TO LENtIl _ -~17Oi IU2 TRAILING EDGE TIP SPACERi WRAP WITH COPPER WIRE LEAD OUT WIRE END DETAIL WING SIR TEMPLATE FALSE RIM REQ lAO GREET GA REQ 3T0 GREET GO BEG 3Ar GREET FALSE RS QIRE SPOKE RENT AIR OUTLET IF-ICL ENGINE NAY NE OPEGET IF SENRED I2 FOR NOVICE TRAINING 4r 4IAIG PLY NOSE RINGRULLOW AS 0SPINNERNRSBLOCK GAB MAPLE ENGINE MOUNTS 04 RUNCE TANK OVERFLOW N GEAd FOR 35 ORIAN SWEET SIMILAR GLOW PLUG ACCESS AIR OUTLET AZ U 0 lAP LIAR PLY 15 SREET TN WREELS 24 Model Aviation 7I 7 I/HSBEETL HINGE LOCATIONS -PG SHEET FLAPS II --HINGE Li InC PLYWOOD REINFORcEMENT--WING SPASBorn SHOES uC SHEET AGE LEFT SIDE IB 0 V0 TIP SPACER IB BALSA TO RE GOES AT WING TIP TO HEEF LEADING N TRAILING EDGES AT TOE PHOPER DISTANCE FROM EACR OThER DARING CONSTRUCTIONfl ----U REMOVE AFTER TOP N BOTTOMLi NIBS ABE GLUED IN MAKE TWOI ----I -F#]3 NTLON BELLUNANK C PLY- B - R FLY BELLCHANU MOUNT 0 ROOT CONTROL TRAVEL 10 GIG CANOPYF-H35 OP N DOWN CUT DUNN 7/ NH] LZJ 12N PLY PLY OHOBLERS 12D NB _K AIV flY U NjEBBSW SININT I/N PLYF-B IWj//r4LI20 PIXKOALDB7 044 W MEL IION EBEKI PANECABS OHS Vt BWEuI~FEIL-L-JI BiNA /NKBNIC N N SOLORSGEAR FARING SABINSCO NuN SHSN N U U VB PLYWOOD NUCEL NETAIGER N PUNT SHORT BAG MUSIC WRE UNG BE*RINOS\LRCATWNN 3N SWEET I/C SHEETIFIRM OFOI USE LANGE YECO CONTROL HOFINS WHEN BEARINGS ALL P05050KG 3/SC MGBIC WIRE FOR LONG LEE SINK ALL RONNB REIN BRASS ThWNO / P5 14T OAEE7 3/B SHEET/ ISOFTK-U-// V27jrzVIB PLY P050500 GUIDE O132 SKEET I/V OBEET_____ Ui.IBINTOFIT P NOOK DOCQG32PL SOON ER~PONNSOD I/N GO MOWC NINE 3/N SNEE GOES APES/C SKEET GUSSET WILD UPFSORHB5SFTAIL WHEEL NSIIEE0 3HZAA/BPLY SKERIT I/V SMEETHAND BA GA LINCR FOBMGEA EN NCKES SUPPOR B___________________________________ U 2 3450 RUOKER OFFNET July1976 25 --4 /02 PLY DOWLER rir I /LkJ LEFT NINE ONLY CARDINAL COMFWTITION SEGNYER FOR 30 ENGINES NH CLARENCE NABUNE
Edition: Model Aviation - 1976/07
Page Numbers: 22, 23, 24, 25
THROUGH THE YEARS control-line stunt has provided author hours pleasure both construction long line models thou sands patterns flown ever-present challenge make intersections keep proper elevations turn radius provides incentive practice harder develop better designs good competitive-level flight pattern requires good airplane so-called stunters set back state art discourage potentially good fliers improve flying skills properly designed constructed stunter will settle groove requires little no thought flying modei allowing full concentration perfecting maneuvers flier busy flghtiig unstable over-sensitive under- over-powered model simply out trim chances putting accept able pattern minimal other words good model must Cardinal Sin ner good model Most stunt designs evolve long line experimental models case Cardinal Sinner entirely true previous stunters developed around partially sheeted D-tube wing construction few foam-cored wings thrown variety Moment arms began show some standardization wing areas airfoils worked up opti mum values old standby Fox 35 stunt engine constant battle weight led investigate virtues Detroiter type bird-cage wing struc ture method building wing always fascinated leery its strength apparent delicacy strip ribs protection sheeting finally gave way curiosity built Cardinal Sinner birdcage wing After flying design three years am totally satisfied its strength adequate normal care fragile important much lighter structure cannot emphasize enough impor tance keeping weight down stunter Cardinal Sinner designed use contest grade 4-6 pound per cubic foot balsa throughout exception wing leading trailing edges spar caps should firm stock Built finished recommended should give finished model around 45 ounces Im firmly convinced light model will beat heavy time especially wind heavy ships build up terrific speeds consecutive maneuv ers point being practically un controllable light ship means light power loading making engines work Purposeful pretty model displayed elevators flaps displaced 35 degreeswhich adequate Its light con struction contributes tight turning ability Although light model strong GJinaI much easier windy conditions light wing loading fights bad effects centri fugal force gravity Perhaps should mention name has no relation performance model named after Cardinals North Idaho College provides employment Building model type little different conventional stunter being sort unitized body ship builds together Maybe thats bird-cage wings called Detroiters Start building up wing spar will note plans call both wings equal span quit building outboard wing shorter several years ago found models fly fine way look much better plywood doublers top bottom center make up 22 Model Aviation large air scoop provides ample cooling Air flow regulated 1/2 x 2-1/2 exit slot Glow plug access exhaust opening metal lined Moments areas typical all-out stunt machine Slight rudder offset ia used No engine offset required Ship adequate iy powered 35 model named after Cardinals North Idaho College sound design please discriminating CL stunt pilot 35-powered model makes use Detroiter bird-cage wing structural lightness Clarence Haught strength lost belicrank clearances spar web Cut out 1/32 plywood fuselage doub lers bond 3/16 sides contact cement Cut spar leading trailing edge holes sides using doublers guide Taper sides 3/32 thickness rear sanding block add motor mounts Cut out formers bellcrank platform Clear tee shaped space build ing bench large enough accommodate wing fuselage assembly Slide fuselage sides over spar fit up formers F- 1 F-2 bellcrank platform Place assembly inverted bench over wing plan Check align ments carefully spar level fuselage square formers straight Glue securely allow adequate drying time Install temporary spacers F-3 F-4 F-5 locations join fuselage sides tail pacer Work flap horn position through trailing edge holes slide railing edge position splice should reinforced /8 plywood doubler shown plan Align trailing edge plan block up tips until perfectly level Repeat process leading edge Anchor tips spar prevent movement direction Install /s sheet wing tips aid alignment Install full length sliced ribs bottom surface wing begin ning rib Trim ribs length trailing edge As progress toward tip may need trim slight amount leading edge ribs get seat spar Add false ribs dry before moving model carefully sand ribs chordwise direction using sanding block spans least six ribs insure uniform airfoil Turn model over repeat upper wing surfaces Cement aminations place wing tips give wing finish sanding rounding leading edge shaping trailing edge shown plan Install 3 nylon bellcrank flexible leadouts Secure leadout guides bottom wing tip location shown Epoxy tip weight right wing Bird-cage wings tend little snag prone around shop uncovered state suggest giving structure couple coats clear dope covering wet GM Silkspan followed two three coats clear dope Select some light V4 stock flaps Sand shape hinge wing fitting carefully flap horn Similarly fabricate stabilizer elevator assembly tapering tips assemble paying particu lar care insure proper alignment hon zontafly laterally sure flap elevator horns select have some type bearing anchor bearing securely long life should bush pushrod holes short length brass tubing secured soldered washers side Install fuselage formers plywood pushrod guide Hook up controls using 3/32 music wire pushrods Note holes used plan low wide-stance landing gear adds grace class providing shock absorption smooth landings Often such landing gears tend sag distort crack fairings eliminate problem provide better mounting leg fairings wheel pants fabri cate reinforcement 046 music wire Bind three places copper wire shown solder main gear legs FairJuly1976 23 Cowl retained bike spoke aligned dow el rear Cowl splits needle valve preserves adjustments pictures author Cardinal Sinner ings made two pieces 3/16 x a sandwiching gear leg wheel pants built around installed wheels Solder washer axle inboard side wheel retain wheel wire retainer-pant mount Wheel pants mounted fashion extremely durable Complete landing gear through sanding stage before stalling F-2 tailwheel mount may seem little beefy has designed withstand loads imposed take-off stooge fly alone Use very light s/s balsa sheet bottom dont have proper ma terial tack glue shape remove hollow reinstall bottom permanently As begin seal up fuselage sure controls free well lubricated petroleum jelly Install 3/32 sheet turtle deck sides Sand top cap t Sand shape blending sheet fin rudder Note rudder offset Drill engine mounts favorite engine may use two degrees right offset wish Install 4-40 blind nuts Tack glue block place carve shape Remove hollow indicated Reinstall securely Build up cowl t Reinforce inside corners Y4 triangle stock have old engine construction dummy install old 2 spinner mounted care fully plug exhaust intake ports good engine install Trim interior cowl fit tack glue over engine Fit 1 / 16 plywood nose ring Sand nose model its final contours Pop off cowling install align ment dowel bike-spoke retainer ply wood reinforcement recommend lining following openings metal exhaust port glow-plug access needle-valve hole carb air intake cooling air exit may may lined Assorted brass tubing tin can stock good uses Revent 4 oz T-21 E Veco stunt tank shown mount lower edge engine mounts behind F-l Cover tank compart ment t balsa procedure allows shape nose vents being way provides easy access tank necessaiy later Give entire model light sanding fill dents scars filler Finishing stunter nearly controversial politics Ill offer method con sideration First prefer dope finishes lieve lighter easier work much easier repair last least five years adequate purposes also like use nitrate dope base because its less severe shrinking qualities its excellent bonding ability Butyrate used color coats Butyrate totally compatible over nitrate reverse true Butyrate can used throughout good results Begin applying two coats clear bare wood sanding 400 grit after coat Cover wood tissue adhered mixture 75% thinner 25% dope suggest Japanese tissue areas single curvature Just lay tissue place brush above mixture will adhere tissue wrinklefree manner Japanese tissue avail able use 00 rubber power Silkspan Cover compound curved areas 00 Silkspan dampened water spray Windex bottle adhere same manner Use pieces smaller size necessary avoid overlapping seams possible Try neat butt seams no gap Brush approximately five coats clear dope sanding lightly wellworn 400 grit 600 grit paper used dry very careful sanding over wing ribs can easily sand through Sand direction ribs Try sand between ribs rest will take care itself point apply fillets wing stabi lizer rudder fuselage intersections like micro-balloons mixed Formula Hobbypoxy best Just mix micro-balloons epoxy until workable putty formed Apply mixture bare finger Smooth approximate dimension Dip clean finger dope thinner smooth work fillet finished shape Let dry sand lightly admire No shrinking No fuss bother purpose waiting until point finish procedure keep dope build-up fillets minimum Butyrate dope never quits shrinking have thick build-up inside curve such fillet lifting usual result Any desired cockpit detail interior finish should added now covered well-fitted canopy Mask off canopy fair fuselage micro-balloons epoxy Prepare filler adding talcum powder clear dope brown gravy consistency Thin brushing apply coat wood areas except over fillets dry sand back clear leaving filler grain Spray final coat clear sanding very lightly completely dry should now ready color Apply color spray gun air brush Use just enough cover pigmented dope very heavy Allow dry two three days before masking trim can run tape through fingers re move some sticking ability less ening likelihood tape lifting base color removing masking tape apply large trim areas spray gun resort brush striping use brush trim seal edges masking tape light coat clear before applying color avoid seepage under tape After trimming lettering have applied sand raised edges lightly 600 grit paper Give model minimum six sprayed coats clear butyrate dope sure no plasticizer has added apply coats session Let dope dry well between coats Butyrate dope has tendency soften coats application hurrying step will give problems over-softening finish too deep continued page 91 Low racy appearance pleasing eye Ship takes full advantage ground cushion smooth landings Ground attitude easily adjusted bending tail-wheel wire Tail wheel securely mounted allow holding loop attached use solo flight stooge WTII WINOS EQUAL SPAN L4R U2 LEMO 50 OF IN SOLDER BIOS ONLYI0IUU OZ 1 0002 NYLON LEADYOT /TSP WT - I R SYEET ROI2 AT ORAtiNG EDGE TRIM AIRS TO LENtIl _ -~17Oi IU2 TRAILING EDGE TIP SPACERi WRAP WITH COPPER WIRE LEAD OUT WIRE END DETAIL WING SIR TEMPLATE FALSE RIM REQ lAO GREET GA REQ 3T0 GREET GO BEG 3Ar GREET FALSE RS QIRE SPOKE RENT AIR OUTLET IF-ICL ENGINE NAY NE OPEGET IF SENRED I2 FOR NOVICE TRAINING 4r 4IAIG PLY NOSE RINGRULLOW AS 0SPINNERNRSBLOCK GAB MAPLE ENGINE MOUNTS 04 RUNCE TANK OVERFLOW N GEAd FOR 35 ORIAN SWEET SIMILAR GLOW PLUG ACCESS AIR OUTLET AZ U 0 lAP LIAR PLY 15 SREET TN WREELS 24 Model Aviation 7I 7 I/HSBEETL HINGE LOCATIONS -PG SHEET FLAPS II --HINGE Li InC PLYWOOD REINFORcEMENT--WING SPASBorn SHOES uC SHEET AGE LEFT SIDE IB 0 V0 TIP SPACER IB BALSA TO RE GOES AT WING TIP TO HEEF LEADING N TRAILING EDGES AT TOE PHOPER DISTANCE FROM EACR OThER DARING CONSTRUCTIONfl ----U REMOVE AFTER TOP N BOTTOMLi NIBS ABE GLUED IN MAKE TWOI ----I -F#]3 NTLON BELLUNANK C PLY- B - R FLY BELLCHANU MOUNT 0 ROOT CONTROL TRAVEL 10 GIG CANOPYF-H35 OP N DOWN CUT DUNN 7/ NH] LZJ 12N PLY PLY OHOBLERS 12D NB _K AIV flY U NjEBBSW SININT I/N PLYF-B IWj//r4LI20 PIXKOALDB7 044 W MEL IION EBEKI PANECABS OHS Vt BWEuI~FEIL-L-JI BiNA /NKBNIC N N SOLORSGEAR FARING SABINSCO NuN SHSN N U U VB PLYWOOD NUCEL NETAIGER N PUNT SHORT BAG MUSIC WRE UNG BE*RINOS\LRCATWNN 3N SWEET I/C SHEETIFIRM OFOI USE LANGE YECO CONTROL HOFINS WHEN BEARINGS ALL P05050KG 3/SC MGBIC WIRE FOR LONG LEE SINK ALL RONNB REIN BRASS ThWNO / P5 14T OAEE7 3/B SHEET/ ISOFTK-U-// V27jrzVIB PLY P050500 GUIDE O132 SKEET I/V OBEET_____ Ui.IBINTOFIT P NOOK DOCQG32PL SOON ER~PONNSOD I/N GO MOWC NINE 3/N SNEE GOES APES/C SKEET GUSSET WILD UPFSORHB5SFTAIL WHEEL NSIIEE0 3HZAA/BPLY SKERIT I/V SMEETHAND BA GA LINCR FOBMGEA EN NCKES SUPPOR B___________________________________ U 2 3450 RUOKER OFFNET July1976 25 --4 /02 PLY DOWLER rir I /LkJ LEFT NINE ONLY CARDINAL COMFWTITION SEGNYER FOR 30 ENGINES NH CLARENCE NABUNE
Edition: Model Aviation - 1976/07
Page Numbers: 22, 23, 24, 25
THROUGH THE YEARS control-line stunt has provided author hours pleasure both construction long line models thou sands patterns flown ever-present challenge make intersections keep proper elevations turn radius provides incentive practice harder develop better designs good competitive-level flight pattern requires good airplane so-called stunters set back state art discourage potentially good fliers improve flying skills properly designed constructed stunter will settle groove requires little no thought flying modei allowing full concentration perfecting maneuvers flier busy flghtiig unstable over-sensitive under- over-powered model simply out trim chances putting accept able pattern minimal other words good model must Cardinal Sin ner good model Most stunt designs evolve long line experimental models case Cardinal Sinner entirely true previous stunters developed around partially sheeted D-tube wing construction few foam-cored wings thrown variety Moment arms began show some standardization wing areas airfoils worked up opti mum values old standby Fox 35 stunt engine constant battle weight led investigate virtues Detroiter type bird-cage wing struc ture method building wing always fascinated leery its strength apparent delicacy strip ribs protection sheeting finally gave way curiosity built Cardinal Sinner birdcage wing After flying design three years am totally satisfied its strength adequate normal care fragile important much lighter structure cannot emphasize enough impor tance keeping weight down stunter Cardinal Sinner designed use contest grade 4-6 pound per cubic foot balsa throughout exception wing leading trailing edges spar caps should firm stock Built finished recommended should give finished model around 45 ounces Im firmly convinced light model will beat heavy time especially wind heavy ships build up terrific speeds consecutive maneuv ers point being practically un controllable light ship means light power loading making engines work Purposeful pretty model displayed elevators flaps displaced 35 degreeswhich adequate Its light con struction contributes tight turning ability Although light model strong GJinaI much easier windy conditions light wing loading fights bad effects centri fugal force gravity Perhaps should mention name has no relation performance model named after Cardinals North Idaho College provides employment Building model type little different conventional stunter being sort unitized body ship builds together Maybe thats bird-cage wings called Detroiters Start building up wing spar will note plans call both wings equal span quit building outboard wing shorter several years ago found models fly fine way look much better plywood doublers top bottom center make up 22 Model Aviation large air scoop provides ample cooling Air flow regulated 1/2 x 2-1/2 exit slot Glow plug access exhaust opening metal lined Moments areas typical all-out stunt machine Slight rudder offset ia used No engine offset required Ship adequate iy powered 35 model named after Cardinals North Idaho College sound design please discriminating CL stunt pilot 35-powered model makes use Detroiter bird-cage wing structural lightness Clarence Haught strength lost belicrank clearances spar web Cut out 1/32 plywood fuselage doub lers bond 3/16 sides contact cement Cut spar leading trailing edge holes sides using doublers guide Taper sides 3/32 thickness rear sanding block add motor mounts Cut out formers bellcrank platform Clear tee shaped space build ing bench large enough accommodate wing fuselage assembly Slide fuselage sides over spar fit up formers F- 1 F-2 bellcrank platform Place assembly inverted bench over wing plan Check align ments carefully spar level fuselage square formers straight Glue securely allow adequate drying time Install temporary spacers F-3 F-4 F-5 locations join fuselage sides tail pacer Work flap horn position through trailing edge holes slide railing edge position splice should reinforced /8 plywood doubler shown plan Align trailing edge plan block up tips until perfectly level Repeat process leading edge Anchor tips spar prevent movement direction Install /s sheet wing tips aid alignment Install full length sliced ribs bottom surface wing begin ning rib Trim ribs length trailing edge As progress toward tip may need trim slight amount leading edge ribs get seat spar Add false ribs dry before moving model carefully sand ribs chordwise direction using sanding block spans least six ribs insure uniform airfoil Turn model over repeat upper wing surfaces Cement aminations place wing tips give wing finish sanding rounding leading edge shaping trailing edge shown plan Install 3 nylon bellcrank flexible leadouts Secure leadout guides bottom wing tip location shown Epoxy tip weight right wing Bird-cage wings tend little snag prone around shop uncovered state suggest giving structure couple coats clear dope covering wet GM Silkspan followed two three coats clear dope Select some light V4 stock flaps Sand shape hinge wing fitting carefully flap horn Similarly fabricate stabilizer elevator assembly tapering tips assemble paying particu lar care insure proper alignment hon zontafly laterally sure flap elevator horns select have some type bearing anchor bearing securely long life should bush pushrod holes short length brass tubing secured soldered washers side Install fuselage formers plywood pushrod guide Hook up controls using 3/32 music wire pushrods Note holes used plan low wide-stance landing gear adds grace class providing shock absorption smooth landings Often such landing gears tend sag distort crack fairings eliminate problem provide better mounting leg fairings wheel pants fabri cate reinforcement 046 music wire Bind three places copper wire shown solder main gear legs FairJuly1976 23 Cowl retained bike spoke aligned dow el rear Cowl splits needle valve preserves adjustments pictures author Cardinal Sinner ings made two pieces 3/16 x a sandwiching gear leg wheel pants built around installed wheels Solder washer axle inboard side wheel retain wheel wire retainer-pant mount Wheel pants mounted fashion extremely durable Complete landing gear through sanding stage before stalling F-2 tailwheel mount may seem little beefy has designed withstand loads imposed take-off stooge fly alone Use very light s/s balsa sheet bottom dont have proper ma terial tack glue shape remove hollow reinstall bottom permanently As begin seal up fuselage sure controls free well lubricated petroleum jelly Install 3/32 sheet turtle deck sides Sand top cap t Sand shape blending sheet fin rudder Note rudder offset Drill engine mounts favorite engine may use two degrees right offset wish Install 4-40 blind nuts Tack glue block place carve shape Remove hollow indicated Reinstall securely Build up cowl t Reinforce inside corners Y4 triangle stock have old engine construction dummy install old 2 spinner mounted care fully plug exhaust intake ports good engine install Trim interior cowl fit tack glue over engine Fit 1 / 16 plywood nose ring Sand nose model its final contours Pop off cowling install align ment dowel bike-spoke retainer ply wood reinforcement recommend lining following openings metal exhaust port glow-plug access needle-valve hole carb air intake cooling air exit may may lined Assorted brass tubing tin can stock good uses Revent 4 oz T-21 E Veco stunt tank shown mount lower edge engine mounts behind F-l Cover tank compart ment t balsa procedure allows shape nose vents being way provides easy access tank necessaiy later Give entire model light sanding fill dents scars filler Finishing stunter nearly controversial politics Ill offer method con sideration First prefer dope finishes lieve lighter easier work much easier repair last least five years adequate purposes also like use nitrate dope base because its less severe shrinking qualities its excellent bonding ability Butyrate used color coats Butyrate totally compatible over nitrate reverse true Butyrate can used throughout good results Begin applying two coats clear bare wood sanding 400 grit after coat Cover wood tissue adhered mixture 75% thinner 25% dope suggest Japanese tissue areas single curvature Just lay tissue place brush above mixture will adhere tissue wrinklefree manner Japanese tissue avail able use 00 rubber power Silkspan Cover compound curved areas 00 Silkspan dampened water spray Windex bottle adhere same manner Use pieces smaller size necessary avoid overlapping seams possible Try neat butt seams no gap Brush approximately five coats clear dope sanding lightly wellworn 400 grit 600 grit paper used dry very careful sanding over wing ribs can easily sand through Sand direction ribs Try sand between ribs rest will take care itself point apply fillets wing stabi lizer rudder fuselage intersections like micro-balloons mixed Formula Hobbypoxy best Just mix micro-balloons epoxy until workable putty formed Apply mixture bare finger Smooth approximate dimension Dip clean finger dope thinner smooth work fillet finished shape Let dry sand lightly admire No shrinking No fuss bother purpose waiting until point finish procedure keep dope build-up fillets minimum Butyrate dope never quits shrinking have thick build-up inside curve such fillet lifting usual result Any desired cockpit detail interior finish should added now covered well-fitted canopy Mask off canopy fair fuselage micro-balloons epoxy Prepare filler adding talcum powder clear dope brown gravy consistency Thin brushing apply coat wood areas except over fillets dry sand back clear leaving filler grain Spray final coat clear sanding very lightly completely dry should now ready color Apply color spray gun air brush Use just enough cover pigmented dope very heavy Allow dry two three days before masking trim can run tape through fingers re move some sticking ability less ening likelihood tape lifting base color removing masking tape apply large trim areas spray gun resort brush striping use brush trim seal edges masking tape light coat clear before applying color avoid seepage under tape After trimming lettering have applied sand raised edges lightly 600 grit paper Give model minimum six sprayed coats clear butyrate dope sure no plasticizer has added apply coats session Let dope dry well between coats Butyrate dope has tendency soften coats application hurrying step will give problems over-softening finish too deep continued page 91 Low racy appearance pleasing eye Ship takes full advantage ground cushion smooth landings Ground attitude easily adjusted bending tail-wheel wire Tail wheel securely mounted allow holding loop attached use solo flight stooge WTII WINOS EQUAL SPAN L4R U2 LEMO 50 OF IN SOLDER BIOS ONLYI0IUU OZ 1 0002 NYLON LEADYOT /TSP WT - I R SYEET ROI2 AT ORAtiNG EDGE TRIM AIRS TO LENtIl _ -~17Oi IU2 TRAILING EDGE TIP SPACERi WRAP WITH COPPER WIRE LEAD OUT WIRE END DETAIL WING SIR TEMPLATE FALSE RIM REQ lAO GREET GA REQ 3T0 GREET GO BEG 3Ar GREET FALSE RS QIRE SPOKE RENT AIR OUTLET IF-ICL ENGINE NAY NE OPEGET IF SENRED I2 FOR NOVICE TRAINING 4r 4IAIG PLY NOSE RINGRULLOW AS 0SPINNERNRSBLOCK GAB MAPLE ENGINE MOUNTS 04 RUNCE TANK OVERFLOW N GEAd FOR 35 ORIAN SWEET SIMILAR GLOW PLUG ACCESS AIR OUTLET AZ U 0 lAP LIAR PLY 15 SREET TN WREELS 24 Model Aviation 7I 7 I/HSBEETL HINGE LOCATIONS -PG SHEET FLAPS II --HINGE Li InC PLYWOOD REINFORcEMENT--WING SPASBorn SHOES uC SHEET AGE LEFT SIDE IB 0 V0 TIP SPACER IB BALSA TO RE GOES AT WING TIP TO HEEF LEADING N TRAILING EDGES AT TOE PHOPER DISTANCE FROM EACR OThER DARING CONSTRUCTIONfl ----U REMOVE AFTER TOP N BOTTOMLi NIBS ABE GLUED IN MAKE TWOI ----I -F#]3 NTLON BELLUNANK C PLY- B - R FLY BELLCHANU MOUNT 0 ROOT CONTROL TRAVEL 10 GIG CANOPYF-H35 OP N DOWN CUT DUNN 7/ NH] LZJ 12N PLY PLY OHOBLERS 12D NB _K AIV flY U NjEBBSW SININT I/N PLYF-B IWj//r4LI20 PIXKOALDB7 044 W MEL IION EBEKI PANECABS OHS Vt BWEuI~FEIL-L-JI BiNA /NKBNIC N N SOLORSGEAR FARING SABINSCO NuN SHSN N U U VB PLYWOOD NUCEL NETAIGER N PUNT SHORT BAG MUSIC WRE UNG BE*RINOS\LRCATWNN 3N SWEET I/C SHEETIFIRM OFOI USE LANGE YECO CONTROL HOFINS WHEN BEARINGS ALL P05050KG 3/SC MGBIC WIRE FOR LONG LEE SINK ALL RONNB REIN BRASS ThWNO / P5 14T OAEE7 3/B SHEET/ ISOFTK-U-// V27jrzVIB PLY P050500 GUIDE O132 SKEET I/V OBEET_____ Ui.IBINTOFIT P NOOK DOCQG32PL SOON ER~PONNSOD I/N GO MOWC NINE 3/N SNEE GOES APES/C SKEET GUSSET WILD UPFSORHB5SFTAIL WHEEL NSIIEE0 3HZAA/BPLY SKERIT I/V SMEETHAND BA GA LINCR FOBMGEA EN NCKES SUPPOR B___________________________________ U 2 3450 RUOKER OFFNET July1976 25 --4 /02 PLY DOWLER rir I /LkJ LEFT NINE ONLY CARDINAL COMFWTITION SEGNYER FOR 30 ENGINES NH CLARENCE NABUNE
Edition: Model Aviation - 1976/07
Page Numbers: 22, 23, 24, 25
THROUGH THE YEARS control-line stunt has provided author hours pleasure both construction long line models thou sands patterns flown ever-present challenge make intersections keep proper elevations turn radius provides incentive practice harder develop better designs good competitive-level flight pattern requires good airplane so-called stunters set back state art discourage potentially good fliers improve flying skills properly designed constructed stunter will settle groove requires little no thought flying modei allowing full concentration perfecting maneuvers flier busy flghtiig unstable over-sensitive under- over-powered model simply out trim chances putting accept able pattern minimal other words good model must Cardinal Sin ner good model Most stunt designs evolve long line experimental models case Cardinal Sinner entirely true previous stunters developed around partially sheeted D-tube wing construction few foam-cored wings thrown variety Moment arms began show some standardization wing areas airfoils worked up opti mum values old standby Fox 35 stunt engine constant battle weight led investigate virtues Detroiter type bird-cage wing struc ture method building wing always fascinated leery its strength apparent delicacy strip ribs protection sheeting finally gave way curiosity built Cardinal Sinner birdcage wing After flying design three years am totally satisfied its strength adequate normal care fragile important much lighter structure cannot emphasize enough impor tance keeping weight down stunter Cardinal Sinner designed use contest grade 4-6 pound per cubic foot balsa throughout exception wing leading trailing edges spar caps should firm stock Built finished recommended should give finished model around 45 ounces Im firmly convinced light model will beat heavy time especially wind heavy ships build up terrific speeds consecutive maneuv ers point being practically un controllable light ship means light power loading making engines work Purposeful pretty model displayed elevators flaps displaced 35 degreeswhich adequate Its light con struction contributes tight turning ability Although light model strong GJinaI much easier windy conditions light wing loading fights bad effects centri fugal force gravity Perhaps should mention name has no relation performance model named after Cardinals North Idaho College provides employment Building model type little different conventional stunter being sort unitized body ship builds together Maybe thats bird-cage wings called Detroiters Start building up wing spar will note plans call both wings equal span quit building outboard wing shorter several years ago found models fly fine way look much better plywood doublers top bottom center make up 22 Model Aviation large air scoop provides ample cooling Air flow regulated 1/2 x 2-1/2 exit slot Glow plug access exhaust opening metal lined Moments areas typical all-out stunt machine Slight rudder offset ia used No engine offset required Ship adequate iy powered 35 model named after Cardinals North Idaho College sound design please discriminating CL stunt pilot 35-powered model makes use Detroiter bird-cage wing structural lightness Clarence Haught strength lost belicrank clearances spar web Cut out 1/32 plywood fuselage doub lers bond 3/16 sides contact cement Cut spar leading trailing edge holes sides using doublers guide Taper sides 3/32 thickness rear sanding block add motor mounts Cut out formers bellcrank platform Clear tee shaped space build ing bench large enough accommodate wing fuselage assembly Slide fuselage sides over spar fit up formers F- 1 F-2 bellcrank platform Place assembly inverted bench over wing plan Check align ments carefully spar level fuselage square formers straight Glue securely allow adequate drying time Install temporary spacers F-3 F-4 F-5 locations join fuselage sides tail pacer Work flap horn position through trailing edge holes slide railing edge position splice should reinforced /8 plywood doubler shown plan Align trailing edge plan block up tips until perfectly level Repeat process leading edge Anchor tips spar prevent movement direction Install /s sheet wing tips aid alignment Install full length sliced ribs bottom surface wing begin ning rib Trim ribs length trailing edge As progress toward tip may need trim slight amount leading edge ribs get seat spar Add false ribs dry before moving model carefully sand ribs chordwise direction using sanding block spans least six ribs insure uniform airfoil Turn model over repeat upper wing surfaces Cement aminations place wing tips give wing finish sanding rounding leading edge shaping trailing edge shown plan Install 3 nylon bellcrank flexible leadouts Secure leadout guides bottom wing tip location shown Epoxy tip weight right wing Bird-cage wings tend little snag prone around shop uncovered state suggest giving structure couple coats clear dope covering wet GM Silkspan followed two three coats clear dope Select some light V4 stock flaps Sand shape hinge wing fitting carefully flap horn Similarly fabricate stabilizer elevator assembly tapering tips assemble paying particu lar care insure proper alignment hon zontafly laterally sure flap elevator horns select have some type bearing anchor bearing securely long life should bush pushrod holes short length brass tubing secured soldered washers side Install fuselage formers plywood pushrod guide Hook up controls using 3/32 music wire pushrods Note holes used plan low wide-stance landing gear adds grace class providing shock absorption smooth landings Often such landing gears tend sag distort crack fairings eliminate problem provide better mounting leg fairings wheel pants fabri cate reinforcement 046 music wire Bind three places copper wire shown solder main gear legs FairJuly1976 23 Cowl retained bike spoke aligned dow el rear Cowl splits needle valve preserves adjustments pictures author Cardinal Sinner ings made two pieces 3/16 x a sandwiching gear leg wheel pants built around installed wheels Solder washer axle inboard side wheel retain wheel wire retainer-pant mount Wheel pants mounted fashion extremely durable Complete landing gear through sanding stage before stalling F-2 tailwheel mount may seem little beefy has designed withstand loads imposed take-off stooge fly alone Use very light s/s balsa sheet bottom dont have proper ma terial tack glue shape remove hollow reinstall bottom permanently As begin seal up fuselage sure controls free well lubricated petroleum jelly Install 3/32 sheet turtle deck sides Sand top cap t Sand shape blending sheet fin rudder Note rudder offset Drill engine mounts favorite engine may use two degrees right offset wish Install 4-40 blind nuts Tack glue block place carve shape Remove hollow indicated Reinstall securely Build up cowl t Reinforce inside corners Y4 triangle stock have old engine construction dummy install old 2 spinner mounted care fully plug exhaust intake ports good engine install Trim interior cowl fit tack glue over engine Fit 1 / 16 plywood nose ring Sand nose model its final contours Pop off cowling install align ment dowel bike-spoke retainer ply wood reinforcement recommend lining following openings metal exhaust port glow-plug access needle-valve hole carb air intake cooling air exit may may lined Assorted brass tubing tin can stock good uses Revent 4 oz T-21 E Veco stunt tank shown mount lower edge engine mounts behind F-l Cover tank compart ment t balsa procedure allows shape nose vents being way provides easy access tank necessaiy later Give entire model light sanding fill dents scars filler Finishing stunter nearly controversial politics Ill offer method con sideration First prefer dope finishes lieve lighter easier work much easier repair last least five years adequate purposes also like use nitrate dope base because its less severe shrinking qualities its excellent bonding ability Butyrate used color coats Butyrate totally compatible over nitrate reverse true Butyrate can used throughout good results Begin applying two coats clear bare wood sanding 400 grit after coat Cover wood tissue adhered mixture 75% thinner 25% dope suggest Japanese tissue areas single curvature Just lay tissue place brush above mixture will adhere tissue wrinklefree manner Japanese tissue avail able use 00 rubber power Silkspan Cover compound curved areas 00 Silkspan dampened water spray Windex bottle adhere same manner Use pieces smaller size necessary avoid overlapping seams possible Try neat butt seams no gap Brush approximately five coats clear dope sanding lightly wellworn 400 grit 600 grit paper used dry very careful sanding over wing ribs can easily sand through Sand direction ribs Try sand between ribs rest will take care itself point apply fillets wing stabi lizer rudder fuselage intersections like micro-balloons mixed Formula Hobbypoxy best Just mix micro-balloons epoxy until workable putty formed Apply mixture bare finger Smooth approximate dimension Dip clean finger dope thinner smooth work fillet finished shape Let dry sand lightly admire No shrinking No fuss bother purpose waiting until point finish procedure keep dope build-up fillets minimum Butyrate dope never quits shrinking have thick build-up inside curve such fillet lifting usual result Any desired cockpit detail interior finish should added now covered well-fitted canopy Mask off canopy fair fuselage micro-balloons epoxy Prepare filler adding talcum powder clear dope brown gravy consistency Thin brushing apply coat wood areas except over fillets dry sand back clear leaving filler grain Spray final coat clear sanding very lightly completely dry should now ready color Apply color spray gun air brush Use just enough cover pigmented dope very heavy Allow dry two three days before masking trim can run tape through fingers re move some sticking ability less ening likelihood tape lifting base color removing masking tape apply large trim areas spray gun resort brush striping use brush trim seal edges masking tape light coat clear before applying color avoid seepage under tape After trimming lettering have applied sand raised edges lightly 600 grit paper Give model minimum six sprayed coats clear butyrate dope sure no plasticizer has added apply coats session Let dope dry well between coats Butyrate dope has tendency soften coats application hurrying step will give problems over-softening finish too deep continued page 91 Low racy appearance pleasing eye Ship takes full advantage ground cushion smooth landings Ground attitude easily adjusted bending tail-wheel wire Tail wheel securely mounted allow holding loop attached use solo flight stooge WTII WINOS EQUAL SPAN L4R U2 LEMO 50 OF IN SOLDER BIOS ONLYI0IUU OZ 1 0002 NYLON LEADYOT /TSP WT - I R SYEET ROI2 AT ORAtiNG EDGE TRIM AIRS TO LENtIl _ -~17Oi IU2 TRAILING EDGE TIP SPACERi WRAP WITH COPPER WIRE LEAD OUT WIRE END DETAIL WING SIR TEMPLATE FALSE RIM REQ lAO GREET GA REQ 3T0 GREET GO BEG 3Ar GREET FALSE RS QIRE SPOKE RENT AIR OUTLET IF-ICL ENGINE NAY NE OPEGET IF SENRED I2 FOR NOVICE TRAINING 4r 4IAIG PLY NOSE RINGRULLOW AS 0SPINNERNRSBLOCK GAB MAPLE ENGINE MOUNTS 04 RUNCE TANK OVERFLOW N GEAd FOR 35 ORIAN SWEET SIMILAR GLOW PLUG ACCESS AIR OUTLET AZ U 0 lAP LIAR PLY 15 SREET TN WREELS 24 Model Aviation 7I 7 I/HSBEETL HINGE LOCATIONS -PG SHEET FLAPS II --HINGE Li InC PLYWOOD REINFORcEMENT--WING SPASBorn SHOES uC SHEET AGE LEFT SIDE IB 0 V0 TIP SPACER IB BALSA TO RE GOES AT WING TIP TO HEEF LEADING N TRAILING EDGES AT TOE PHOPER DISTANCE FROM EACR OThER DARING CONSTRUCTIONfl ----U REMOVE AFTER TOP N BOTTOMLi NIBS ABE GLUED IN MAKE TWOI ----I -F#]3 NTLON BELLUNANK C PLY- B - R FLY BELLCHANU MOUNT 0 ROOT CONTROL TRAVEL 10 GIG CANOPYF-H35 OP N DOWN CUT DUNN 7/ NH] LZJ 12N PLY PLY OHOBLERS 12D NB _K AIV flY U NjEBBSW SININT I/N PLYF-B IWj//r4LI20 PIXKOALDB7 044 W MEL IION EBEKI PANECABS OHS Vt BWEuI~FEIL-L-JI BiNA /NKBNIC N N SOLORSGEAR FARING SABINSCO NuN SHSN N U U VB PLYWOOD NUCEL NETAIGER N PUNT SHORT BAG MUSIC WRE UNG BE*RINOS\LRCATWNN 3N SWEET I/C SHEETIFIRM OFOI USE LANGE YECO CONTROL HOFINS WHEN BEARINGS ALL P05050KG 3/SC MGBIC WIRE FOR LONG LEE SINK ALL RONNB REIN BRASS ThWNO / P5 14T OAEE7 3/B SHEET/ ISOFTK-U-// V27jrzVIB PLY P050500 GUIDE O132 SKEET I/V OBEET_____ Ui.IBINTOFIT P NOOK DOCQG32PL SOON ER~PONNSOD I/N GO MOWC NINE 3/N SNEE GOES APES/C SKEET GUSSET WILD UPFSORHB5SFTAIL WHEEL NSIIEE0 3HZAA/BPLY SKERIT I/V SMEETHAND BA GA LINCR FOBMGEA EN NCKES SUPPOR B___________________________________ U 2 3450 RUOKER OFFNET July1976 25 --4 /02 PLY DOWLER rir I /LkJ LEFT NINE ONLY CARDINAL COMFWTITION SEGNYER FOR 30 ENGINES NH CLARENCE NABUNE