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A How To: Epoxying Skins to a Foam Wing

Author: J. Alyea


Edition: Model Aviation - 1984/04
Page Numbers: 46, 47, 144

WHATEVER KIND RC model building comes time two things importance speed building lightness Speed leads eventually use foam wings Lightness leads consider cover wing quickly both lightweight durable answer toss out heavy contact cement grab epoxy have used epoxy great success Quarter Midget Pylon Racers wing shown photosand finished modelis Quarter Midget kit Shark produced Doug Brueshaber method also works well Formula mod els no reason cant used other foam wings Radio Control Control Line models next project fact will skinning foam Giant Stik wing using same method Heres Materials foam wing kit scratchbuilt foam wing sure save foam shells Sheet A6 x 4 balsa skin Any good slow-drying epoxy such Hob bypoxy Formula II flat surface as46 Model Aviation bunch ways apply balsa skin foam wing method produces strong bond very little weight penalty wing parts ready assembly two foam cores four 1/16 balsa sheets started out eight sheets before being butt-glued Theyve already sanded vacuumed p LeTt iow-dryng epoxy applied balsa skins ordinary kitchen spatula Scrape epoxy toward front sheet deposit ing excess epoxy cup go finished step balsa should just barely damp thin film epoxy Right wing sandwich assembled flat surface Slow curing time epoxy enables moving adjusting skins necessary until n surfaces perfectly lined up youre using table make sure sturdy enough take weights next step sembly use ood sheet plywood board Weights cement blocks bags salt fuel cans etc plastic kitchen spatula Assembling sandwich Step 1 Butt-glue balsa sheet cor responding length width wing Make four sheets top bottom wing panel After glue has dried sand sheets smooth Step 2 skins drying sand wing cores smooth Vacuum off sand ing dust go over pieces tack cloth Step 3 Make guide marks balsa sheets wing cores can line up place sand wich Step 4 Lay out bottom foam shell flat surface Mix epoxy Step 5 Apply epoxy balsa sheets using scrap balsa stick applicator Get epoxy pretty well smoothed out stick use spatula remove rest Going grain scrape toward being careful remove excess ep oxy need very littlejust damp surfaceas takes small amount bond balsa foam weight applied Prepare four wing skins same way Step 6 Assemble sandwich Lay wing skin bottom shell epoxy side up Lay foam wing panel top skin lining up guide marks Lay second skin top wing panel epoxy side down Place center foam shell top third skin epoxy side up Next lay second wing panel posi Continued page 144 April 1984 47 Left After assembling sandwich lay flat piece plywood top apply weights Eyeball sandwich make sure parts should something crooked remove weights plywood make necessary adjustment Right close view sandwich method assures complete knn4nr nf k din foam finished wing control surfaces tips applied has sanded ready cover ing whole process really very straightforward results worth effort Still usngbld Fashioned ~IGOG Wing Hinges will gain control efficiency eliminating gap between moveable stationary control surfaces will amazed performance gained using simple inexpen sive improvement FREE MOVEMENTt450 STRONG AND LIGHTWEIGHT COMPLETELY FUELPROOF COMPATABLE WITH ALL IRON-ON MATERIALS COMES IN 3 FT LENGTHS SMALL 118 ORPRICE 3 ft $250 LARGE 1/4 EASY TO INSTALL INSTALL HA/GE USFA STRAIGHT PIN 70 MA/YE 2 SMSLL HOLE EVANY RICH OR SOOR/P CYANDACRYLATR HUE IN HOLESCAPILLARY AC77ON MLL CARRY GLUE ALONG ENT41E dOR/T 3FOR ADDITIONAL SEOJRIT1 INSERT SMALL P/N EVERY FEW RICHES C/IT OFF FL/15A 17CC AND SAND AS NEEDED FOR FINISHING Send Free info fine products FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 IC/IT 1/4 OEEP SLIT ALONG TIE F/ILL LENGTH 0 rYE MATIVG YJRFACES pin fire up thingunder budget Yes under budget building method really state mind will reduce airframe hardware costs medium-sized Budgeteer very least $20 dollars including engine twice depending deal can make used engine dedicated RC modeler builds four six planes year method building pro vides savings add up Now what about new radio system saw advertised starter elec trical panel maybe super toolbox legs Under-budget RC way yes really RC manufacturers will get us sooner later wonderful new goodies hooked Ive offered under-budget RC way cope days budgetary woes thatll make budgeted bucks go lot farther Good luck Budgeteer Wing Skinning/Alyea Continued oaoe 47 Under Budget/Schonenberg Continued page 141 V4 flat rubber same used big FF rubber-powered models tying wings around dowels no big rubberbands readily available did find rub ber tie-downs tended become quite oily slippery messyand could stretch come loose Ugh wing bolt hold-down method subsequently invented some unknown modeler plastic bolt special seat system offered ready-made Neat about trusty 3Ae ply doubled up glued fuselage receive two stove bolts through reinforced trailing edge wing Hardware stores have kinds bolts will self-tap predrilled ply seats anchor wing solid ly Finish installation two dowels set leading edge wing facing forward ply-reinforced former just ahead wing holes dowels fit real dowels just pencil stubs rounded off dowel form After buy dowels purpose pen cil stubs just fine As covering guess Ive gone mod ern iron-on stuff easy apply beautiful strong its nearly im possible beat fuel proof around en gine thinned epoxy spray brush fuel-proof paint finish Budget eer Weve finished model theres thingevery pilot/mechanic double pilot/engineer controls RC aircraft needs toolbox dont have gardeners tool tray works very well reasonable number tools small fuel can can try fixing up 12 X 16 strawberry crate broomstick carrying handle holds lots items neatly compartmented Paint staple copy AMA license side club emblem other strawberry buffs will know what once Now youre ready Head flying field flight line Grab frequency Giant rile sTAUB An EaSYtO Fly stand-O~ Scale WW R/G eSign KIt Form $8995 Wingspam 88 . 60 Engines 60 90 4-Stroke Engines 3-Channel Radio systems suggested pleasure build tool Youll like practical construction techniques NICK ZIROLI MODELS 29 Edgar Drive Smithtown New York 11787 USA Please add $300 UPS Shipping Charges. New York State residents add 74% sales tax Phone 516 2345038 tion add fourth skin epoxy side down put final outer foam shell top Take time line up reference marks carefully check fit Eyeballing sandwich best method sections can moved removed until have right beauty method since parts dont adhere right away arent stuck mis takes using contact cement Step 7 Place 3/4 plywood sheet top sandwich Check alignment once correcting necessary Step 8 Carefully add weights least 100 lb depending size wing Make sure sandwich hasnt shifted Al low dry overnight Step 9 Remove weights dis assemble sandwich Youll have two solidly-skinned wing halves ready add ing leading edge tips depending design Easy isnt Light too RC Aerobatics/Van Putte Continued pane 49 high-vibration environment think such product would rank up original steel clevis Ball Link line EZ connectors model product innovations extracted another goodie Davi son Aviator News Davison MI edited Don Parks September 1983 issue column field activities contained following Bill Hill has tried couple stunts little different fashion rest us methods didnt work either can now credited another first also doesnt work came field model radio fuel flight box ready fly has known arrive field necessary equipment time brought 144 Model Aviation 4GAPLESS HINGE SLOTTER Simplifies installation Gapless Hinges --- Makes Slots 4 sizes ol 8alsa ICE $250

Author: J. Alyea


Edition: Model Aviation - 1984/04
Page Numbers: 46, 47, 144

WHATEVER KIND RC model building comes time two things importance speed building lightness Speed leads eventually use foam wings Lightness leads consider cover wing quickly both lightweight durable answer toss out heavy contact cement grab epoxy have used epoxy great success Quarter Midget Pylon Racers wing shown photosand finished modelis Quarter Midget kit Shark produced Doug Brueshaber method also works well Formula mod els no reason cant used other foam wings Radio Control Control Line models next project fact will skinning foam Giant Stik wing using same method Heres Materials foam wing kit scratchbuilt foam wing sure save foam shells Sheet A6 x 4 balsa skin Any good slow-drying epoxy such Hob bypoxy Formula II flat surface as46 Model Aviation bunch ways apply balsa skin foam wing method produces strong bond very little weight penalty wing parts ready assembly two foam cores four 1/16 balsa sheets started out eight sheets before being butt-glued Theyve already sanded vacuumed p LeTt iow-dryng epoxy applied balsa skins ordinary kitchen spatula Scrape epoxy toward front sheet deposit ing excess epoxy cup go finished step balsa should just barely damp thin film epoxy Right wing sandwich assembled flat surface Slow curing time epoxy enables moving adjusting skins necessary until n surfaces perfectly lined up youre using table make sure sturdy enough take weights next step sembly use ood sheet plywood board Weights cement blocks bags salt fuel cans etc plastic kitchen spatula Assembling sandwich Step 1 Butt-glue balsa sheet cor responding length width wing Make four sheets top bottom wing panel After glue has dried sand sheets smooth Step 2 skins drying sand wing cores smooth Vacuum off sand ing dust go over pieces tack cloth Step 3 Make guide marks balsa sheets wing cores can line up place sand wich Step 4 Lay out bottom foam shell flat surface Mix epoxy Step 5 Apply epoxy balsa sheets using scrap balsa stick applicator Get epoxy pretty well smoothed out stick use spatula remove rest Going grain scrape toward being careful remove excess ep oxy need very littlejust damp surfaceas takes small amount bond balsa foam weight applied Prepare four wing skins same way Step 6 Assemble sandwich Lay wing skin bottom shell epoxy side up Lay foam wing panel top skin lining up guide marks Lay second skin top wing panel epoxy side down Place center foam shell top third skin epoxy side up Next lay second wing panel posi Continued page 144 April 1984 47 Left After assembling sandwich lay flat piece plywood top apply weights Eyeball sandwich make sure parts should something crooked remove weights plywood make necessary adjustment Right close view sandwich method assures complete knn4nr nf k din foam finished wing control surfaces tips applied has sanded ready cover ing whole process really very straightforward results worth effort Still usngbld Fashioned ~IGOG Wing Hinges will gain control efficiency eliminating gap between moveable stationary control surfaces will amazed performance gained using simple inexpen sive improvement FREE MOVEMENTt450 STRONG AND LIGHTWEIGHT COMPLETELY FUELPROOF COMPATABLE WITH ALL IRON-ON MATERIALS COMES IN 3 FT LENGTHS SMALL 118 ORPRICE 3 ft $250 LARGE 1/4 EASY TO INSTALL INSTALL HA/GE USFA STRAIGHT PIN 70 MA/YE 2 SMSLL HOLE EVANY RICH OR SOOR/P CYANDACRYLATR HUE IN HOLESCAPILLARY AC77ON MLL CARRY GLUE ALONG ENT41E dOR/T 3FOR ADDITIONAL SEOJRIT1 INSERT SMALL P/N EVERY FEW RICHES C/IT OFF FL/15A 17CC AND SAND AS NEEDED FOR FINISHING Send Free info fine products FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 IC/IT 1/4 OEEP SLIT ALONG TIE F/ILL LENGTH 0 rYE MATIVG YJRFACES pin fire up thingunder budget Yes under budget building method really state mind will reduce airframe hardware costs medium-sized Budgeteer very least $20 dollars including engine twice depending deal can make used engine dedicated RC modeler builds four six planes year method building pro vides savings add up Now what about new radio system saw advertised starter elec trical panel maybe super toolbox legs Under-budget RC way yes really RC manufacturers will get us sooner later wonderful new goodies hooked Ive offered under-budget RC way cope days budgetary woes thatll make budgeted bucks go lot farther Good luck Budgeteer Wing Skinning/Alyea Continued oaoe 47 Under Budget/Schonenberg Continued page 141 V4 flat rubber same used big FF rubber-powered models tying wings around dowels no big rubberbands readily available did find rub ber tie-downs tended become quite oily slippery messyand could stretch come loose Ugh wing bolt hold-down method subsequently invented some unknown modeler plastic bolt special seat system offered ready-made Neat about trusty 3Ae ply doubled up glued fuselage receive two stove bolts through reinforced trailing edge wing Hardware stores have kinds bolts will self-tap predrilled ply seats anchor wing solid ly Finish installation two dowels set leading edge wing facing forward ply-reinforced former just ahead wing holes dowels fit real dowels just pencil stubs rounded off dowel form After buy dowels purpose pen cil stubs just fine As covering guess Ive gone mod ern iron-on stuff easy apply beautiful strong its nearly im possible beat fuel proof around en gine thinned epoxy spray brush fuel-proof paint finish Budget eer Weve finished model theres thingevery pilot/mechanic double pilot/engineer controls RC aircraft needs toolbox dont have gardeners tool tray works very well reasonable number tools small fuel can can try fixing up 12 X 16 strawberry crate broomstick carrying handle holds lots items neatly compartmented Paint staple copy AMA license side club emblem other strawberry buffs will know what once Now youre ready Head flying field flight line Grab frequency Giant rile sTAUB An EaSYtO Fly stand-O~ Scale WW R/G eSign KIt Form $8995 Wingspam 88 . 60 Engines 60 90 4-Stroke Engines 3-Channel Radio systems suggested pleasure build tool Youll like practical construction techniques NICK ZIROLI MODELS 29 Edgar Drive Smithtown New York 11787 USA Please add $300 UPS Shipping Charges. New York State residents add 74% sales tax Phone 516 2345038 tion add fourth skin epoxy side down put final outer foam shell top Take time line up reference marks carefully check fit Eyeballing sandwich best method sections can moved removed until have right beauty method since parts dont adhere right away arent stuck mis takes using contact cement Step 7 Place 3/4 plywood sheet top sandwich Check alignment once correcting necessary Step 8 Carefully add weights least 100 lb depending size wing Make sure sandwich hasnt shifted Al low dry overnight Step 9 Remove weights dis assemble sandwich Youll have two solidly-skinned wing halves ready add ing leading edge tips depending design Easy isnt Light too RC Aerobatics/Van Putte Continued pane 49 high-vibration environment think such product would rank up original steel clevis Ball Link line EZ connectors model product innovations extracted another goodie Davi son Aviator News Davison MI edited Don Parks September 1983 issue column field activities contained following Bill Hill has tried couple stunts little different fashion rest us methods didnt work either can now credited another first also doesnt work came field model radio fuel flight box ready fly has known arrive field necessary equipment time brought 144 Model Aviation 4GAPLESS HINGE SLOTTER Simplifies installation Gapless Hinges --- Makes Slots 4 sizes ol 8alsa ICE $250

Author: J. Alyea


Edition: Model Aviation - 1984/04
Page Numbers: 46, 47, 144

WHATEVER KIND RC model building comes time two things importance speed building lightness Speed leads eventually use foam wings Lightness leads consider cover wing quickly both lightweight durable answer toss out heavy contact cement grab epoxy have used epoxy great success Quarter Midget Pylon Racers wing shown photosand finished modelis Quarter Midget kit Shark produced Doug Brueshaber method also works well Formula mod els no reason cant used other foam wings Radio Control Control Line models next project fact will skinning foam Giant Stik wing using same method Heres Materials foam wing kit scratchbuilt foam wing sure save foam shells Sheet A6 x 4 balsa skin Any good slow-drying epoxy such Hob bypoxy Formula II flat surface as46 Model Aviation bunch ways apply balsa skin foam wing method produces strong bond very little weight penalty wing parts ready assembly two foam cores four 1/16 balsa sheets started out eight sheets before being butt-glued Theyve already sanded vacuumed p LeTt iow-dryng epoxy applied balsa skins ordinary kitchen spatula Scrape epoxy toward front sheet deposit ing excess epoxy cup go finished step balsa should just barely damp thin film epoxy Right wing sandwich assembled flat surface Slow curing time epoxy enables moving adjusting skins necessary until n surfaces perfectly lined up youre using table make sure sturdy enough take weights next step sembly use ood sheet plywood board Weights cement blocks bags salt fuel cans etc plastic kitchen spatula Assembling sandwich Step 1 Butt-glue balsa sheet cor responding length width wing Make four sheets top bottom wing panel After glue has dried sand sheets smooth Step 2 skins drying sand wing cores smooth Vacuum off sand ing dust go over pieces tack cloth Step 3 Make guide marks balsa sheets wing cores can line up place sand wich Step 4 Lay out bottom foam shell flat surface Mix epoxy Step 5 Apply epoxy balsa sheets using scrap balsa stick applicator Get epoxy pretty well smoothed out stick use spatula remove rest Going grain scrape toward being careful remove excess ep oxy need very littlejust damp surfaceas takes small amount bond balsa foam weight applied Prepare four wing skins same way Step 6 Assemble sandwich Lay wing skin bottom shell epoxy side up Lay foam wing panel top skin lining up guide marks Lay second skin top wing panel epoxy side down Place center foam shell top third skin epoxy side up Next lay second wing panel posi Continued page 144 April 1984 47 Left After assembling sandwich lay flat piece plywood top apply weights Eyeball sandwich make sure parts should something crooked remove weights plywood make necessary adjustment Right close view sandwich method assures complete knn4nr nf k din foam finished wing control surfaces tips applied has sanded ready cover ing whole process really very straightforward results worth effort Still usngbld Fashioned ~IGOG Wing Hinges will gain control efficiency eliminating gap between moveable stationary control surfaces will amazed performance gained using simple inexpen sive improvement FREE MOVEMENTt450 STRONG AND LIGHTWEIGHT COMPLETELY FUELPROOF COMPATABLE WITH ALL IRON-ON MATERIALS COMES IN 3 FT LENGTHS SMALL 118 ORPRICE 3 ft $250 LARGE 1/4 EASY TO INSTALL INSTALL HA/GE USFA STRAIGHT PIN 70 MA/YE 2 SMSLL HOLE EVANY RICH OR SOOR/P CYANDACRYLATR HUE IN HOLESCAPILLARY AC77ON MLL CARRY GLUE ALONG ENT41E dOR/T 3FOR ADDITIONAL SEOJRIT1 INSERT SMALL P/N EVERY FEW RICHES C/IT OFF FL/15A 17CC AND SAND AS NEEDED FOR FINISHING Send Free info fine products FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 IC/IT 1/4 OEEP SLIT ALONG TIE F/ILL LENGTH 0 rYE MATIVG YJRFACES pin fire up thingunder budget Yes under budget building method really state mind will reduce airframe hardware costs medium-sized Budgeteer very least $20 dollars including engine twice depending deal can make used engine dedicated RC modeler builds four six planes year method building pro vides savings add up Now what about new radio system saw advertised starter elec trical panel maybe super toolbox legs Under-budget RC way yes really RC manufacturers will get us sooner later wonderful new goodies hooked Ive offered under-budget RC way cope days budgetary woes thatll make budgeted bucks go lot farther Good luck Budgeteer Wing Skinning/Alyea Continued oaoe 47 Under Budget/Schonenberg Continued page 141 V4 flat rubber same used big FF rubber-powered models tying wings around dowels no big rubberbands readily available did find rub ber tie-downs tended become quite oily slippery messyand could stretch come loose Ugh wing bolt hold-down method subsequently invented some unknown modeler plastic bolt special seat system offered ready-made Neat about trusty 3Ae ply doubled up glued fuselage receive two stove bolts through reinforced trailing edge wing Hardware stores have kinds bolts will self-tap predrilled ply seats anchor wing solid ly Finish installation two dowels set leading edge wing facing forward ply-reinforced former just ahead wing holes dowels fit real dowels just pencil stubs rounded off dowel form After buy dowels purpose pen cil stubs just fine As covering guess Ive gone mod ern iron-on stuff easy apply beautiful strong its nearly im possible beat fuel proof around en gine thinned epoxy spray brush fuel-proof paint finish Budget eer Weve finished model theres thingevery pilot/mechanic double pilot/engineer controls RC aircraft needs toolbox dont have gardeners tool tray works very well reasonable number tools small fuel can can try fixing up 12 X 16 strawberry crate broomstick carrying handle holds lots items neatly compartmented Paint staple copy AMA license side club emblem other strawberry buffs will know what once Now youre ready Head flying field flight line Grab frequency Giant rile sTAUB An EaSYtO Fly stand-O~ Scale WW R/G eSign KIt Form $8995 Wingspam 88 . 60 Engines 60 90 4-Stroke Engines 3-Channel Radio systems suggested pleasure build tool Youll like practical construction techniques NICK ZIROLI MODELS 29 Edgar Drive Smithtown New York 11787 USA Please add $300 UPS Shipping Charges. New York State residents add 74% sales tax Phone 516 2345038 tion add fourth skin epoxy side down put final outer foam shell top Take time line up reference marks carefully check fit Eyeballing sandwich best method sections can moved removed until have right beauty method since parts dont adhere right away arent stuck mis takes using contact cement Step 7 Place 3/4 plywood sheet top sandwich Check alignment once correcting necessary Step 8 Carefully add weights least 100 lb depending size wing Make sure sandwich hasnt shifted Al low dry overnight Step 9 Remove weights dis assemble sandwich Youll have two solidly-skinned wing halves ready add ing leading edge tips depending design Easy isnt Light too RC Aerobatics/Van Putte Continued pane 49 high-vibration environment think such product would rank up original steel clevis Ball Link line EZ connectors model product innovations extracted another goodie Davi son Aviator News Davison MI edited Don Parks September 1983 issue column field activities contained following Bill Hill has tried couple stunts little different fashion rest us methods didnt work either can now credited another first also doesnt work came field model radio fuel flight box ready fly has known arrive field necessary equipment time brought 144 Model Aviation 4GAPLESS HINGE SLOTTER Simplifies installation Gapless Hinges --- Makes Slots 4 sizes ol 8alsa ICE $250

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