I adial Mathe nd Got Scale project needs good-looking front end Heres simple step-by-step method molding epoxy-glass cowls foam forms looks great its durable Theres also information making engine cylinders look way theyre supposed SCRATCH-BUILDERS often reject poten tial Scale subject solely because engine cowling seems beyond building skills particularly true prototypes exposed radial engines like have long list Scale subjects would love scratch-build since no kits avail able Invariably past com plexity carving cowling balsa blockcoupled frequently sub standard appearance dummy cylinders discouraged us real efforts constructing dream ships Therefore would like describe tech nique constructing scale cowlings quick easy nearly foolproof use cloth-and-epoxy over Styro foam plug form new nor particularly unusual having introduced modeling part Hobbypoxy EZ Duz tech nique several years ago variation im proves older technique substituting heavy-gauge boat repair fiberglassand utiliz ing jig accurately installing Williams Brothers cylinders important Dynel fiberglass cloth commonly used sold model air craft purposes used technique cloth required type sold boat hull repair auto body work available Sears similar stores have dismal luck using Dynel similar mat terials Following description technique pictures words some notes variations suit particular subject center point tor engine stiaft marked firewall spinner used jig can constructed drilling hole mark firewall Glue dowel Pieces plastic foam Sigs excellent insulation material will built up around hole right angles glue ply disc the dowel front disc using five-minute epoxy plug roughly contoured knife same diameter spinner its front smoothed out sandpaper stroked direction Although plug shape needs exact length engine thrust plate accurate minor dings important will inside finished cowl plug gently removed firwall cutting through epoxy joint back-end reinforcement sheet balsa epoxied Onto foam carved blend balsa provides firm surface against trim excess glass later steps additional length also provides overlap cowl-firewall juncture plug given two heavy coats epoxy use Devcon Slow Cure Hobbypoxy Formula Ill applied scrap balsa sheet trowel Epoxy coating gives firm surface glass layers applied Sections heavyweight glass cloth cut cover areas plug minimal overlapping applied over coats epoxy have spread over plug sections can best kept closely form pressing place section plastic wrap Try push epoxy up through glass weave rubbing against plastic wrap layer must tight layer below order eliminate voids bubbles U large least 12-in balloon used step Apply thick coat epoxy over surface particularly nose balloon will tend roll some epoxy toward back balloon inflated pushed down over plug now wet epoxy certain inner face balloon ex tends below bottom plug Slowly deflate balloon pushed down mak ing certain pulls under bottom edge plug inflated balloon spreads epoxy evenly gives smooth surface After epoxy completely cured remove balloon stripping off Should areas glass completely covered epoxy unlikely unless too little used repeat previous step Minor holes voids can filled Hobbypoxy PFC filler sanded smooth Front back views shown stage point will have surprisingly satisfactory cowl Should using technique subject does have ex posed cylinders cowl ready painting epoxy polyurethane dope com pletely fuel proof remarkably strong yet very light roomy Cut section foam board cardboard large enough clear perimeter cowl several inches Mark center using 180-deg protractor divide circum ference number required sections other words three-cylinder engine used divide plate three 120-deg slices five cylinders 72 deg 360 deg di vided five equals 72 deg etc Draw line center mark through outer marks lines used align rslmndor haiac Cylinders stallation dummy cylinders can frustrating ex perience Attempt ing eyeball positions virtually impossible ria bly producing cylin ders out position unsight ly The fact Williams Brothers cylinders sup plied halves can converted advantage Heres Cut out center plate allow pass over cowl front Position plate blocks level mid-line cy linders Obviously important plate parallel cowl back order cylinders same vertical plane position should checked ruler shims should used needed Position unassembled cylinder halves line marks long axis Mark half-circle cylinder onto fiberglass using Magic Marker pencil Remove cowl cut out half-moons cylinder half carbide CEnSOr srtramnh hand, hara h.t itnifa flip will uffiea liepeat previous step until areas nave least three layers glass-epoxy Areas holes will cut such motor intake will require fourth layer strength Overhanging glass can cut away edges scissors metal shears Fill coffee can similar gasoline Cut away ply front disc balsathen immerse cowl foam will back plate carbide cutter Dremeldissolve liquid can flushed out Moto Tool knife filewith additional gasoline WARNING residue step toxic should discarded sealed container landfill AND THE PROCESS SHOULD BE DONE OUTDOORS Under no circumstances should foam dissolved closed space disposable rubber gloves should used avoid skin contact After dissolving foam interior cowl may rough spiney can sanded smoothed after gasoline vaporizes tive waitswill encourage dust off long-postWe would hope rather simplistic articleponed Scale project start building 34 Model Aviation Return cowl sne jig trial fit cylinder using lines plate Correct cutouts perfect alignment attach cylinder halves cowl small dab five-minute epoxy Once epoxy has cured cut plate two order remove Carefully cut rear half-moons cylinder Assemble rear half-cylinder front sections plastic cement prefer Testors liquid inside cowl firmly adhere cylinders holes epoxy Fill gaps reinforce joints Hobbypoxy PFC filler Cut out clear ance holes motor adding glass epoxy areas around seem weak reasonable amount luck skill will now have cowl cylinders cowl should painted point Mask off cylinders tape spray brush may justifiably proud Al- finish Pushrods other details can added after finishing cylinders can though description would tend indicate painted flat black left natural find helpful install details 16-in music wire inserted holes drilled piece cylinder itself Wilhold R/C 56 excela long tedious procedure reality lent adhesive use remains semi-flexible after curing Install cowl onto seldom consume two hours fab- model whatever technique best suits model like use sheet metal screws ricating cowls procedure running hardwood blocks epoxied onto firewall does require some waiting epoxy cure wise plan work around other buliding steps avoid long unproduc PROPHET SERIES 4 2-meter 2 3 channel High Performance Sailplane youve asked finally available Computer designed highest LD 2-meter ships Youve read about Model Soaring Model Aviation Sailplane See construction articles Model Airplane News January February March 1982 Fly 1980 NSS Regional LSF Regional AMA Nationals Florida State Champion today Retail price $4995 includes fine wood rolled plans hardware Post-paid US Available fine hobby shops order direct Joe RuthSPAN78 6018 Black Dairy Rd #4Weight pr sq ft Sefiner FL 33584 Constbalsa spruce ply
Edition: Model Aviation - 1982/02
Page Numbers: 32, 33, 34
I adial Mathe nd Got Scale project needs good-looking front end Heres simple step-by-step method molding epoxy-glass cowls foam forms looks great its durable Theres also information making engine cylinders look way theyre supposed SCRATCH-BUILDERS often reject poten tial Scale subject solely because engine cowling seems beyond building skills particularly true prototypes exposed radial engines like have long list Scale subjects would love scratch-build since no kits avail able Invariably past com plexity carving cowling balsa blockcoupled frequently sub standard appearance dummy cylinders discouraged us real efforts constructing dream ships Therefore would like describe tech nique constructing scale cowlings quick easy nearly foolproof use cloth-and-epoxy over Styro foam plug form new nor particularly unusual having introduced modeling part Hobbypoxy EZ Duz tech nique several years ago variation im proves older technique substituting heavy-gauge boat repair fiberglassand utiliz ing jig accurately installing Williams Brothers cylinders important Dynel fiberglass cloth commonly used sold model air craft purposes used technique cloth required type sold boat hull repair auto body work available Sears similar stores have dismal luck using Dynel similar mat terials Following description technique pictures words some notes variations suit particular subject center point tor engine stiaft marked firewall spinner used jig can constructed drilling hole mark firewall Glue dowel Pieces plastic foam Sigs excellent insulation material will built up around hole right angles glue ply disc the dowel front disc using five-minute epoxy plug roughly contoured knife same diameter spinner its front smoothed out sandpaper stroked direction Although plug shape needs exact length engine thrust plate accurate minor dings important will inside finished cowl plug gently removed firwall cutting through epoxy joint back-end reinforcement sheet balsa epoxied Onto foam carved blend balsa provides firm surface against trim excess glass later steps additional length also provides overlap cowl-firewall juncture plug given two heavy coats epoxy use Devcon Slow Cure Hobbypoxy Formula Ill applied scrap balsa sheet trowel Epoxy coating gives firm surface glass layers applied Sections heavyweight glass cloth cut cover areas plug minimal overlapping applied over coats epoxy have spread over plug sections can best kept closely form pressing place section plastic wrap Try push epoxy up through glass weave rubbing against plastic wrap layer must tight layer below order eliminate voids bubbles U large least 12-in balloon used step Apply thick coat epoxy over surface particularly nose balloon will tend roll some epoxy toward back balloon inflated pushed down over plug now wet epoxy certain inner face balloon ex tends below bottom plug Slowly deflate balloon pushed down mak ing certain pulls under bottom edge plug inflated balloon spreads epoxy evenly gives smooth surface After epoxy completely cured remove balloon stripping off Should areas glass completely covered epoxy unlikely unless too little used repeat previous step Minor holes voids can filled Hobbypoxy PFC filler sanded smooth Front back views shown stage point will have surprisingly satisfactory cowl Should using technique subject does have ex posed cylinders cowl ready painting epoxy polyurethane dope com pletely fuel proof remarkably strong yet very light roomy Cut section foam board cardboard large enough clear perimeter cowl several inches Mark center using 180-deg protractor divide circum ference number required sections other words three-cylinder engine used divide plate three 120-deg slices five cylinders 72 deg 360 deg di vided five equals 72 deg etc Draw line center mark through outer marks lines used align rslmndor haiac Cylinders stallation dummy cylinders can frustrating ex perience Attempt ing eyeball positions virtually impossible ria bly producing cylin ders out position unsight ly The fact Williams Brothers cylinders sup plied halves can converted advantage Heres Cut out center plate allow pass over cowl front Position plate blocks level mid-line cy linders Obviously important plate parallel cowl back order cylinders same vertical plane position should checked ruler shims should used needed Position unassembled cylinder halves line marks long axis Mark half-circle cylinder onto fiberglass using Magic Marker pencil Remove cowl cut out half-moons cylinder half carbide CEnSOr srtramnh hand, hara h.t itnifa flip will uffiea liepeat previous step until areas nave least three layers glass-epoxy Areas holes will cut such motor intake will require fourth layer strength Overhanging glass can cut away edges scissors metal shears Fill coffee can similar gasoline Cut away ply front disc balsathen immerse cowl foam will back plate carbide cutter Dremeldissolve liquid can flushed out Moto Tool knife filewith additional gasoline WARNING residue step toxic should discarded sealed container landfill AND THE PROCESS SHOULD BE DONE OUTDOORS Under no circumstances should foam dissolved closed space disposable rubber gloves should used avoid skin contact After dissolving foam interior cowl may rough spiney can sanded smoothed after gasoline vaporizes tive waitswill encourage dust off long-postWe would hope rather simplistic articleponed Scale project start building 34 Model Aviation Return cowl sne jig trial fit cylinder using lines plate Correct cutouts perfect alignment attach cylinder halves cowl small dab five-minute epoxy Once epoxy has cured cut plate two order remove Carefully cut rear half-moons cylinder Assemble rear half-cylinder front sections plastic cement prefer Testors liquid inside cowl firmly adhere cylinders holes epoxy Fill gaps reinforce joints Hobbypoxy PFC filler Cut out clear ance holes motor adding glass epoxy areas around seem weak reasonable amount luck skill will now have cowl cylinders cowl should painted point Mask off cylinders tape spray brush may justifiably proud Al- finish Pushrods other details can added after finishing cylinders can though description would tend indicate painted flat black left natural find helpful install details 16-in music wire inserted holes drilled piece cylinder itself Wilhold R/C 56 excela long tedious procedure reality lent adhesive use remains semi-flexible after curing Install cowl onto seldom consume two hours fab- model whatever technique best suits model like use sheet metal screws ricating cowls procedure running hardwood blocks epoxied onto firewall does require some waiting epoxy cure wise plan work around other buliding steps avoid long unproduc PROPHET SERIES 4 2-meter 2 3 channel High Performance Sailplane youve asked finally available Computer designed highest LD 2-meter ships Youve read about Model Soaring Model Aviation Sailplane See construction articles Model Airplane News January February March 1982 Fly 1980 NSS Regional LSF Regional AMA Nationals Florida State Champion today Retail price $4995 includes fine wood rolled plans hardware Post-paid US Available fine hobby shops order direct Joe RuthSPAN78 6018 Black Dairy Rd #4Weight pr sq ft Sefiner FL 33584 Constbalsa spruce ply
Edition: Model Aviation - 1982/02
Page Numbers: 32, 33, 34
I adial Mathe nd Got Scale project needs good-looking front end Heres simple step-by-step method molding epoxy-glass cowls foam forms looks great its durable Theres also information making engine cylinders look way theyre supposed SCRATCH-BUILDERS often reject poten tial Scale subject solely because engine cowling seems beyond building skills particularly true prototypes exposed radial engines like have long list Scale subjects would love scratch-build since no kits avail able Invariably past com plexity carving cowling balsa blockcoupled frequently sub standard appearance dummy cylinders discouraged us real efforts constructing dream ships Therefore would like describe tech nique constructing scale cowlings quick easy nearly foolproof use cloth-and-epoxy over Styro foam plug form new nor particularly unusual having introduced modeling part Hobbypoxy EZ Duz tech nique several years ago variation im proves older technique substituting heavy-gauge boat repair fiberglassand utiliz ing jig accurately installing Williams Brothers cylinders important Dynel fiberglass cloth commonly used sold model air craft purposes used technique cloth required type sold boat hull repair auto body work available Sears similar stores have dismal luck using Dynel similar mat terials Following description technique pictures words some notes variations suit particular subject center point tor engine stiaft marked firewall spinner used jig can constructed drilling hole mark firewall Glue dowel Pieces plastic foam Sigs excellent insulation material will built up around hole right angles glue ply disc the dowel front disc using five-minute epoxy plug roughly contoured knife same diameter spinner its front smoothed out sandpaper stroked direction Although plug shape needs exact length engine thrust plate accurate minor dings important will inside finished cowl plug gently removed firwall cutting through epoxy joint back-end reinforcement sheet balsa epoxied Onto foam carved blend balsa provides firm surface against trim excess glass later steps additional length also provides overlap cowl-firewall juncture plug given two heavy coats epoxy use Devcon Slow Cure Hobbypoxy Formula Ill applied scrap balsa sheet trowel Epoxy coating gives firm surface glass layers applied Sections heavyweight glass cloth cut cover areas plug minimal overlapping applied over coats epoxy have spread over plug sections can best kept closely form pressing place section plastic wrap Try push epoxy up through glass weave rubbing against plastic wrap layer must tight layer below order eliminate voids bubbles U large least 12-in balloon used step Apply thick coat epoxy over surface particularly nose balloon will tend roll some epoxy toward back balloon inflated pushed down over plug now wet epoxy certain inner face balloon ex tends below bottom plug Slowly deflate balloon pushed down mak ing certain pulls under bottom edge plug inflated balloon spreads epoxy evenly gives smooth surface After epoxy completely cured remove balloon stripping off Should areas glass completely covered epoxy unlikely unless too little used repeat previous step Minor holes voids can filled Hobbypoxy PFC filler sanded smooth Front back views shown stage point will have surprisingly satisfactory cowl Should using technique subject does have ex posed cylinders cowl ready painting epoxy polyurethane dope com pletely fuel proof remarkably strong yet very light roomy Cut section foam board cardboard large enough clear perimeter cowl several inches Mark center using 180-deg protractor divide circum ference number required sections other words three-cylinder engine used divide plate three 120-deg slices five cylinders 72 deg 360 deg di vided five equals 72 deg etc Draw line center mark through outer marks lines used align rslmndor haiac Cylinders stallation dummy cylinders can frustrating ex perience Attempt ing eyeball positions virtually impossible ria bly producing cylin ders out position unsight ly The fact Williams Brothers cylinders sup plied halves can converted advantage Heres Cut out center plate allow pass over cowl front Position plate blocks level mid-line cy linders Obviously important plate parallel cowl back order cylinders same vertical plane position should checked ruler shims should used needed Position unassembled cylinder halves line marks long axis Mark half-circle cylinder onto fiberglass using Magic Marker pencil Remove cowl cut out half-moons cylinder half carbide CEnSOr srtramnh hand, hara h.t itnifa flip will uffiea liepeat previous step until areas nave least three layers glass-epoxy Areas holes will cut such motor intake will require fourth layer strength Overhanging glass can cut away edges scissors metal shears Fill coffee can similar gasoline Cut away ply front disc balsathen immerse cowl foam will back plate carbide cutter Dremeldissolve liquid can flushed out Moto Tool knife filewith additional gasoline WARNING residue step toxic should discarded sealed container landfill AND THE PROCESS SHOULD BE DONE OUTDOORS Under no circumstances should foam dissolved closed space disposable rubber gloves should used avoid skin contact After dissolving foam interior cowl may rough spiney can sanded smoothed after gasoline vaporizes tive waitswill encourage dust off long-postWe would hope rather simplistic articleponed Scale project start building 34 Model Aviation Return cowl sne jig trial fit cylinder using lines plate Correct cutouts perfect alignment attach cylinder halves cowl small dab five-minute epoxy Once epoxy has cured cut plate two order remove Carefully cut rear half-moons cylinder Assemble rear half-cylinder front sections plastic cement prefer Testors liquid inside cowl firmly adhere cylinders holes epoxy Fill gaps reinforce joints Hobbypoxy PFC filler Cut out clear ance holes motor adding glass epoxy areas around seem weak reasonable amount luck skill will now have cowl cylinders cowl should painted point Mask off cylinders tape spray brush may justifiably proud Al- finish Pushrods other details can added after finishing cylinders can though description would tend indicate painted flat black left natural find helpful install details 16-in music wire inserted holes drilled piece cylinder itself Wilhold R/C 56 excela long tedious procedure reality lent adhesive use remains semi-flexible after curing Install cowl onto seldom consume two hours fab- model whatever technique best suits model like use sheet metal screws ricating cowls procedure running hardwood blocks epoxied onto firewall does require some waiting epoxy cure wise plan work around other buliding steps avoid long unproduc PROPHET SERIES 4 2-meter 2 3 channel High Performance Sailplane youve asked finally available Computer designed highest LD 2-meter ships Youve read about Model Soaring Model Aviation Sailplane See construction articles Model Airplane News January February March 1982 Fly 1980 NSS Regional LSF Regional AMA Nationals Florida State Champion today Retail price $4995 includes fine wood rolled plans hardware Post-paid US Available fine hobby shops order direct Joe RuthSPAN78 6018 Black Dairy Rd #4Weight pr sq ft Sefiner FL 33584 Constbalsa spruce ply