Control Line SCALE Bill Boss BASED recent letters De cember 1982 column convening RC kit CL use appears have well received letters very complimentary thank also provided some ideas future columns ideas control retractable landing gear system Control Line plane prompted James Griffin Philadelphia PA James indicated letter December article helped him greatly conversion Royal P-5 RC kit now building However features wants incorporate new project re tractable landing gear asked could supply information Rom Air system used Ed Wilowski P-47 appeared December column cant provide specific information Wilowski model installation can provide data Rom Air control valve unit have using very successfully Top Flite P-39 several flying seasons same unit now being installed SBD Dauntless Pete Bianchini Yonkers NY see photo James also asked 3/16 ag 3/8 BRASS STO SOLDER 3/8 BRASS WASHER 3/8 LI--EYELET 51 DRILL1/4 HOLE 1/16 Two methods making stop modified Ram Air control unit machined brass stock B readily-available pansa washer large eyelet info column comment installation retractable gear systems general 1 would like comply feel too variations gear systems types planes general article very mean ingful However feel December column detailed strengthen center sec tion Control Line Scale model big step toward solid bed mount retractable landing gear system little thought ingenuity along manufacturers installation instruc tions should help get gear mounted article will detail operation Rom Air control valve same basic idea can applied operation switch controlling servo-operated retracting system Building control valve unit accompany ing photo shows Rom Air control valve unit completed state upper half photo lower half picture shows various parts before assembly Items required unit ar& about six inches 062 piano wire two stops top-hat-shaped stopssee sketch details B piece -in plywood about x 5-in 6-32 x -in -long machine bolt nut spring about -in-long can set min imum 12-15 lb pulling tension before stret ches two 2-56 x 3/4-in-long machine bolts nuts mounting control valve theply platform first step make loop end piano wire place stop wire solder against loop just made Next place control valve second stop wire shown lower half photo Now hold sembly upright position hold wire loop end allowing control valve second stop fall against stop previously soldered Solder second stop place cut off excess wire leave about 1-in make second loop steps completed should able move valve control back forth quarter-in small amount travel required position valve piston triggering up down gear actuation valve unit Continued page 150 April 1983 69 ete uancnini Yonkers NY has Douglas SBD Dauntless under constructionitll have Rom Air retracts heres Pete installed modi fied control valve foam wing pressure tank workbench front wing filler valve wing between tank valve will accessed bottom wing model complete Modifying control valve subject column Heres Rom Air retract system control valve modified readied installation CL Scale modelits operated 4th control line Completed unit top shown gear-down position Bottom photo shows valve before mounting Read column several sad stories about handles developed frayed leadout wires sub sequently broke causing demise air plane However E-Z Just thickest stranded wire 050 Martines productions f35 cable Hunts handles some very good stainless steel cable 045 Bob said recently cable handles seven strands braided cable E-Z Just handles cable somewhat stiff Hunts cable flexibility important pre cise control near future hope have some information precise type cable obtain Jim Hunt Bobs Father trying recover records CSC operation will tell what cable used loops end leadout wire handle should made just like leadout loops wings Con sult AMA rule book p 17 proper way tie ends After wrapping ends fine brass wire will want either use couple drops epoxy solder loop Some people prefer solder leadout loops because feel heat soldering gun can damage wire opinion average modeler can build handle few nights using tools normally used construct Stunt airplane have advantages machinist friend can adhere strictly dimensions presented Figure 2 Because previous dependence E-Z Just handle fliers long feel trimming variables handle lines has frequently overlooked Although Baron pointed out 1977 article has taken until demise available handles cause fliers explore variables handle/line trimming decide build own handle certain pick quality componentsthats pride joy out end lines Also information Stunt PAMPA contact Wynn Paul 1640 Mavwick Dr Lexington KY 40504 CL Scale/Boss Contirtued page 69 now ready mounting ply platform Drill appropriate hole 6-32 bolt about -in end plywood piece mount spring attach just-completed control -valve unit spring can now pull back valve body tension placed spring hold body plywood together small C-clamp spring tension can tested Using pull-test-type scale 0-25 0-50 lb scale will attached free wire loop test pull required operate valve Adjust valve position minimum 12-15 lb pull required operate valve completely position determined drill appropriate holes plywood mount valve 2-56 bolts now ready install unit models wing Referring once again December column will notice Sketch theres con siderable amount platform space behind bellcrank ideal place mounting either tOp bottom platform com pleted retract-control unit After mounting unit hook up retract special design often times required reproduce special paint design cowling tail surface go along particular color scheme artist probably can paint design model free hand average guy art department following procedure might pre vent ruining models finish Start determining exact size shape design Next make frame scrap balsa /x /4 square about er design sides Now dope piece silkspan over frame its dry water-shrink tissue would cover ing models wing tissue completely dry draw design tissue very soft lead pencil taking care tear tissue draw ing complete paint appropriate colors using several thin coats Note paint used should compatible models overall finish Using several thin coats will allow buildup paint color design completed paint thoroughly dry remove balsa frame pair scissors carefully cut out newly-made design Apply design model spreading light coat clear dope back design still wet apply model much would decal careful Use minimum amount dope point will soften design paint too much design prop erly affixed model can apply coat 150 Model Aviation certain stay away power lines flying system hoses attach appropriate leadout wire flying lines good conductors electricity thread through wing youwould belland dont want take chances flying crank leadoutyour installation now complete anywhere near power lines ready use recommend wire used information working drawings fourth line operate unit flying materials required control line handle small 015 stranded wire has worked well can contact Ed Robbert 1616 Meadowthorpe Ave. Lexington KY 40505 tel 606 253-1769 clear over design surrounding area hesitate apply design made fashion new model might good idea practice old model once twice get feel much dope required great ad vantage making special designs manner mined design does mean ruined model finish Send items CL Scale Bill Bos 77-06 269th St New Hyde Pork NY 11040 FW 190/Paul Continued page 68 front Add rudder square set aside dry Give wing assembly good sanding Apply two coats dope seal wood Sand rough spots cover wing lightweight silkspan prefer put silkspan wet allow irregular curves might exist Cover panel separately well tips Give fin ished wing light spray water set aside covering shrink wing dry begin fitting fuselage assembly helps add lot strength model fit looks good epoxy wing fuselage check squareness stress alignment lot because model built true will fly true will have strange habits flying either upright inverted After epoxy has cured give entire model five coats clear dope sanding well tween coats finish makes model come alive comes profiles Look around color scheme like try copy several books available have color plans Focke WuIf 190 colors shown plan model authentic used military flats background colors plastic tape tnstgnta trim numbers control out lines Add wheels engine propeller Hook up pushrod balance model try fly model balancing it can very tricky fly wtth wrong balance point Add whatever weight needs before head fly ing field original model flown 35-ft steel lines markedly improve As per formance over cloth Dacron lines Steel lines also much safer Flying Once field hook up con trol lines check out work Ad just handle ensure neutral control model handle neutral first few flights feel model out slowly Begin climbs dives gradually work up loops figure eights inverted flight Focke Wulfe 190 will stunts except squares difficulty Before try Combat matches suggest get well acquainted models minimum maximum turning radius will help save pulling out too late heat duel Get know 190 intimately con flying buddy building Spitfire CL Combat/Johnson Continued naoe 72 direction another fully-deflected tab would probably make interesting flight would amuse opponent least fuse 1/32-in plywood actual tabs plenty heavy can cut scissors knife Fuel-proofing optional keep unsealed wood away wet grass because neat trim tab will warp youll need tab tab Contact cement works very well securing wood aluminum wing Its about best thing Ive found hooking tabs plastic-covered wings youre doing put thin coat both surfaces allow dry can read instructions bottle wait Aluminum works real well hinge material probably about 010-in right use thinner material will bend easily thicker seems hold setting better can cut aluminum scissors easily youll notice strips like curl up after theyve cutwhich going make hard attach Take piece hardwood like motor mount run back forth across strip holding hard surface like table bench may have flip over couple times pretty soon aluminum will give up stay straight can attach no problems sure leave little room between trim tab trailing edge adjustment something can done few minutes field models always built straight can used April 1983 151
Edition: Model Aviation - 1983/04
Page Numbers: 69, 150, 151
Control Line SCALE Bill Boss BASED recent letters De cember 1982 column convening RC kit CL use appears have well received letters very complimentary thank also provided some ideas future columns ideas control retractable landing gear system Control Line plane prompted James Griffin Philadelphia PA James indicated letter December article helped him greatly conversion Royal P-5 RC kit now building However features wants incorporate new project re tractable landing gear asked could supply information Rom Air system used Ed Wilowski P-47 appeared December column cant provide specific information Wilowski model installation can provide data Rom Air control valve unit have using very successfully Top Flite P-39 several flying seasons same unit now being installed SBD Dauntless Pete Bianchini Yonkers NY see photo James also asked 3/16 ag 3/8 BRASS STO SOLDER 3/8 BRASS WASHER 3/8 LI--EYELET 51 DRILL1/4 HOLE 1/16 Two methods making stop modified Ram Air control unit machined brass stock B readily-available pansa washer large eyelet info column comment installation retractable gear systems general 1 would like comply feel too variations gear systems types planes general article very mean ingful However feel December column detailed strengthen center sec tion Control Line Scale model big step toward solid bed mount retractable landing gear system little thought ingenuity along manufacturers installation instruc tions should help get gear mounted article will detail operation Rom Air control valve same basic idea can applied operation switch controlling servo-operated retracting system Building control valve unit accompany ing photo shows Rom Air control valve unit completed state upper half photo lower half picture shows various parts before assembly Items required unit ar& about six inches 062 piano wire two stops top-hat-shaped stopssee sketch details B piece -in plywood about x 5-in 6-32 x -in -long machine bolt nut spring about -in-long can set min imum 12-15 lb pulling tension before stret ches two 2-56 x 3/4-in-long machine bolts nuts mounting control valve theply platform first step make loop end piano wire place stop wire solder against loop just made Next place control valve second stop wire shown lower half photo Now hold sembly upright position hold wire loop end allowing control valve second stop fall against stop previously soldered Solder second stop place cut off excess wire leave about 1-in make second loop steps completed should able move valve control back forth quarter-in small amount travel required position valve piston triggering up down gear actuation valve unit Continued page 150 April 1983 69 ete uancnini Yonkers NY has Douglas SBD Dauntless under constructionitll have Rom Air retracts heres Pete installed modi fied control valve foam wing pressure tank workbench front wing filler valve wing between tank valve will accessed bottom wing model complete Modifying control valve subject column Heres Rom Air retract system control valve modified readied installation CL Scale modelits operated 4th control line Completed unit top shown gear-down position Bottom photo shows valve before mounting Read column several sad stories about handles developed frayed leadout wires sub sequently broke causing demise air plane However E-Z Just thickest stranded wire 050 Martines productions f35 cable Hunts handles some very good stainless steel cable 045 Bob said recently cable handles seven strands braided cable E-Z Just handles cable somewhat stiff Hunts cable flexibility important pre cise control near future hope have some information precise type cable obtain Jim Hunt Bobs Father trying recover records CSC operation will tell what cable used loops end leadout wire handle should made just like leadout loops wings Con sult AMA rule book p 17 proper way tie ends After wrapping ends fine brass wire will want either use couple drops epoxy solder loop Some people prefer solder leadout loops because feel heat soldering gun can damage wire opinion average modeler can build handle few nights using tools normally used construct Stunt airplane have advantages machinist friend can adhere strictly dimensions presented Figure 2 Because previous dependence E-Z Just handle fliers long feel trimming variables handle lines has frequently overlooked Although Baron pointed out 1977 article has taken until demise available handles cause fliers explore variables handle/line trimming decide build own handle certain pick quality componentsthats pride joy out end lines Also information Stunt PAMPA contact Wynn Paul 1640 Mavwick Dr Lexington KY 40504 CL Scale/Boss Contirtued page 69 now ready mounting ply platform Drill appropriate hole 6-32 bolt about -in end plywood piece mount spring attach just-completed control -valve unit spring can now pull back valve body tension placed spring hold body plywood together small C-clamp spring tension can tested Using pull-test-type scale 0-25 0-50 lb scale will attached free wire loop test pull required operate valve Adjust valve position minimum 12-15 lb pull required operate valve completely position determined drill appropriate holes plywood mount valve 2-56 bolts now ready install unit models wing Referring once again December column will notice Sketch theres con siderable amount platform space behind bellcrank ideal place mounting either tOp bottom platform com pleted retract-control unit After mounting unit hook up retract special design often times required reproduce special paint design cowling tail surface go along particular color scheme artist probably can paint design model free hand average guy art department following procedure might pre vent ruining models finish Start determining exact size shape design Next make frame scrap balsa /x /4 square about er design sides Now dope piece silkspan over frame its dry water-shrink tissue would cover ing models wing tissue completely dry draw design tissue very soft lead pencil taking care tear tissue draw ing complete paint appropriate colors using several thin coats Note paint used should compatible models overall finish Using several thin coats will allow buildup paint color design completed paint thoroughly dry remove balsa frame pair scissors carefully cut out newly-made design Apply design model spreading light coat clear dope back design still wet apply model much would decal careful Use minimum amount dope point will soften design paint too much design prop erly affixed model can apply coat 150 Model Aviation certain stay away power lines flying system hoses attach appropriate leadout wire flying lines good conductors electricity thread through wing youwould belland dont want take chances flying crank leadoutyour installation now complete anywhere near power lines ready use recommend wire used information working drawings fourth line operate unit flying materials required control line handle small 015 stranded wire has worked well can contact Ed Robbert 1616 Meadowthorpe Ave. Lexington KY 40505 tel 606 253-1769 clear over design surrounding area hesitate apply design made fashion new model might good idea practice old model once twice get feel much dope required great ad vantage making special designs manner mined design does mean ruined model finish Send items CL Scale Bill Bos 77-06 269th St New Hyde Pork NY 11040 FW 190/Paul Continued page 68 front Add rudder square set aside dry Give wing assembly good sanding Apply two coats dope seal wood Sand rough spots cover wing lightweight silkspan prefer put silkspan wet allow irregular curves might exist Cover panel separately well tips Give fin ished wing light spray water set aside covering shrink wing dry begin fitting fuselage assembly helps add lot strength model fit looks good epoxy wing fuselage check squareness stress alignment lot because model built true will fly true will have strange habits flying either upright inverted After epoxy has cured give entire model five coats clear dope sanding well tween coats finish makes model come alive comes profiles Look around color scheme like try copy several books available have color plans Focke WuIf 190 colors shown plan model authentic used military flats background colors plastic tape tnstgnta trim numbers control out lines Add wheels engine propeller Hook up pushrod balance model try fly model balancing it can very tricky fly wtth wrong balance point Add whatever weight needs before head fly ing field original model flown 35-ft steel lines markedly improve As per formance over cloth Dacron lines Steel lines also much safer Flying Once field hook up con trol lines check out work Ad just handle ensure neutral control model handle neutral first few flights feel model out slowly Begin climbs dives gradually work up loops figure eights inverted flight Focke Wulfe 190 will stunts except squares difficulty Before try Combat matches suggest get well acquainted models minimum maximum turning radius will help save pulling out too late heat duel Get know 190 intimately con flying buddy building Spitfire CL Combat/Johnson Continued naoe 72 direction another fully-deflected tab would probably make interesting flight would amuse opponent least fuse 1/32-in plywood actual tabs plenty heavy can cut scissors knife Fuel-proofing optional keep unsealed wood away wet grass because neat trim tab will warp youll need tab tab Contact cement works very well securing wood aluminum wing Its about best thing Ive found hooking tabs plastic-covered wings youre doing put thin coat both surfaces allow dry can read instructions bottle wait Aluminum works real well hinge material probably about 010-in right use thinner material will bend easily thicker seems hold setting better can cut aluminum scissors easily youll notice strips like curl up after theyve cutwhich going make hard attach Take piece hardwood like motor mount run back forth across strip holding hard surface like table bench may have flip over couple times pretty soon aluminum will give up stay straight can attach no problems sure leave little room between trim tab trailing edge adjustment something can done few minutes field models always built straight can used April 1983 151
Edition: Model Aviation - 1983/04
Page Numbers: 69, 150, 151
Control Line SCALE Bill Boss BASED recent letters De cember 1982 column convening RC kit CL use appears have well received letters very complimentary thank also provided some ideas future columns ideas control retractable landing gear system Control Line plane prompted James Griffin Philadelphia PA James indicated letter December article helped him greatly conversion Royal P-5 RC kit now building However features wants incorporate new project re tractable landing gear asked could supply information Rom Air system used Ed Wilowski P-47 appeared December column cant provide specific information Wilowski model installation can provide data Rom Air control valve unit have using very successfully Top Flite P-39 several flying seasons same unit now being installed SBD Dauntless Pete Bianchini Yonkers NY see photo James also asked 3/16 ag 3/8 BRASS STO SOLDER 3/8 BRASS WASHER 3/8 LI--EYELET 51 DRILL1/4 HOLE 1/16 Two methods making stop modified Ram Air control unit machined brass stock B readily-available pansa washer large eyelet info column comment installation retractable gear systems general 1 would like comply feel too variations gear systems types planes general article very mean ingful However feel December column detailed strengthen center sec tion Control Line Scale model big step toward solid bed mount retractable landing gear system little thought ingenuity along manufacturers installation instruc tions should help get gear mounted article will detail operation Rom Air control valve same basic idea can applied operation switch controlling servo-operated retracting system Building control valve unit accompany ing photo shows Rom Air control valve unit completed state upper half photo lower half picture shows various parts before assembly Items required unit ar& about six inches 062 piano wire two stops top-hat-shaped stopssee sketch details B piece -in plywood about x 5-in 6-32 x -in -long machine bolt nut spring about -in-long can set min imum 12-15 lb pulling tension before stret ches two 2-56 x 3/4-in-long machine bolts nuts mounting control valve theply platform first step make loop end piano wire place stop wire solder against loop just made Next place control valve second stop wire shown lower half photo Now hold sembly upright position hold wire loop end allowing control valve second stop fall against stop previously soldered Solder second stop place cut off excess wire leave about 1-in make second loop steps completed should able move valve control back forth quarter-in small amount travel required position valve piston triggering up down gear actuation valve unit Continued page 150 April 1983 69 ete uancnini Yonkers NY has Douglas SBD Dauntless under constructionitll have Rom Air retracts heres Pete installed modi fied control valve foam wing pressure tank workbench front wing filler valve wing between tank valve will accessed bottom wing model complete Modifying control valve subject column Heres Rom Air retract system control valve modified readied installation CL Scale modelits operated 4th control line Completed unit top shown gear-down position Bottom photo shows valve before mounting Read column several sad stories about handles developed frayed leadout wires sub sequently broke causing demise air plane However E-Z Just thickest stranded wire 050 Martines productions f35 cable Hunts handles some very good stainless steel cable 045 Bob said recently cable handles seven strands braided cable E-Z Just handles cable somewhat stiff Hunts cable flexibility important pre cise control near future hope have some information precise type cable obtain Jim Hunt Bobs Father trying recover records CSC operation will tell what cable used loops end leadout wire handle should made just like leadout loops wings Con sult AMA rule book p 17 proper way tie ends After wrapping ends fine brass wire will want either use couple drops epoxy solder loop Some people prefer solder leadout loops because feel heat soldering gun can damage wire opinion average modeler can build handle few nights using tools normally used construct Stunt airplane have advantages machinist friend can adhere strictly dimensions presented Figure 2 Because previous dependence E-Z Just handle fliers long feel trimming variables handle lines has frequently overlooked Although Baron pointed out 1977 article has taken until demise available handles cause fliers explore variables handle/line trimming decide build own handle certain pick quality componentsthats pride joy out end lines Also information Stunt PAMPA contact Wynn Paul 1640 Mavwick Dr Lexington KY 40504 CL Scale/Boss Contirtued page 69 now ready mounting ply platform Drill appropriate hole 6-32 bolt about -in end plywood piece mount spring attach just-completed control -valve unit spring can now pull back valve body tension placed spring hold body plywood together small C-clamp spring tension can tested Using pull-test-type scale 0-25 0-50 lb scale will attached free wire loop test pull required operate valve Adjust valve position minimum 12-15 lb pull required operate valve completely position determined drill appropriate holes plywood mount valve 2-56 bolts now ready install unit models wing Referring once again December column will notice Sketch theres con siderable amount platform space behind bellcrank ideal place mounting either tOp bottom platform com pleted retract-control unit After mounting unit hook up retract special design often times required reproduce special paint design cowling tail surface go along particular color scheme artist probably can paint design model free hand average guy art department following procedure might pre vent ruining models finish Start determining exact size shape design Next make frame scrap balsa /x /4 square about er design sides Now dope piece silkspan over frame its dry water-shrink tissue would cover ing models wing tissue completely dry draw design tissue very soft lead pencil taking care tear tissue draw ing complete paint appropriate colors using several thin coats Note paint used should compatible models overall finish Using several thin coats will allow buildup paint color design completed paint thoroughly dry remove balsa frame pair scissors carefully cut out newly-made design Apply design model spreading light coat clear dope back design still wet apply model much would decal careful Use minimum amount dope point will soften design paint too much design prop erly affixed model can apply coat 150 Model Aviation certain stay away power lines flying system hoses attach appropriate leadout wire flying lines good conductors electricity thread through wing youwould belland dont want take chances flying crank leadoutyour installation now complete anywhere near power lines ready use recommend wire used information working drawings fourth line operate unit flying materials required control line handle small 015 stranded wire has worked well can contact Ed Robbert 1616 Meadowthorpe Ave. Lexington KY 40505 tel 606 253-1769 clear over design surrounding area hesitate apply design made fashion new model might good idea practice old model once twice get feel much dope required great ad vantage making special designs manner mined design does mean ruined model finish Send items CL Scale Bill Bos 77-06 269th St New Hyde Pork NY 11040 FW 190/Paul Continued page 68 front Add rudder square set aside dry Give wing assembly good sanding Apply two coats dope seal wood Sand rough spots cover wing lightweight silkspan prefer put silkspan wet allow irregular curves might exist Cover panel separately well tips Give fin ished wing light spray water set aside covering shrink wing dry begin fitting fuselage assembly helps add lot strength model fit looks good epoxy wing fuselage check squareness stress alignment lot because model built true will fly true will have strange habits flying either upright inverted After epoxy has cured give entire model five coats clear dope sanding well tween coats finish makes model come alive comes profiles Look around color scheme like try copy several books available have color plans Focke WuIf 190 colors shown plan model authentic used military flats background colors plastic tape tnstgnta trim numbers control out lines Add wheels engine propeller Hook up pushrod balance model try fly model balancing it can very tricky fly wtth wrong balance point Add whatever weight needs before head fly ing field original model flown 35-ft steel lines markedly improve As per formance over cloth Dacron lines Steel lines also much safer Flying Once field hook up con trol lines check out work Ad just handle ensure neutral control model handle neutral first few flights feel model out slowly Begin climbs dives gradually work up loops figure eights inverted flight Focke Wulfe 190 will stunts except squares difficulty Before try Combat matches suggest get well acquainted models minimum maximum turning radius will help save pulling out too late heat duel Get know 190 intimately con flying buddy building Spitfire CL Combat/Johnson Continued naoe 72 direction another fully-deflected tab would probably make interesting flight would amuse opponent least fuse 1/32-in plywood actual tabs plenty heavy can cut scissors knife Fuel-proofing optional keep unsealed wood away wet grass because neat trim tab will warp youll need tab tab Contact cement works very well securing wood aluminum wing Its about best thing Ive found hooking tabs plastic-covered wings youre doing put thin coat both surfaces allow dry can read instructions bottle wait Aluminum works real well hinge material probably about 010-in right use thinner material will bend easily thicker seems hold setting better can cut aluminum scissors easily youll notice strips like curl up after theyve cutwhich going make hard attach Take piece hardwood like motor mount run back forth across strip holding hard surface like table bench may have flip over couple times pretty soon aluminum will give up stay straight can attach no problems sure leave little room between trim tab trailing edge adjustment something can done few minutes field models always built straight can used April 1983 151