HOW TO MAKE COWL RNGS Bill Boss wthout athe Step 3 Now put arbor balsa disc assembly electric drill sure direction rotation drill direction arrow shown disc Next position drill press assembly vise approximately 1/2 clearance between disc angle tool rest tool rest about center disc Clamp units firmly place 10 Model Aviation Step 1 initial step making nose cowl ring determine proper size mark up balsa block rings representing inside outside diameters cowl Using saw cut along out side ring remove excess balsaa disc remains Step 2 Drill hole appropriate size center disc mount arbor have lathe set use same turning procedure have no lathe youll have scrounge substitute perhaps electric drill did author DURING THE COURSE building model plane always task seems little troublesome rest recently came across such task constructing newly designed Carrier plane task making perfectly round properly-shaped cowl ring balsa After couple very poor attempts hand carving shaping sandpaper decided way solve problem would turn out ring wood lathe thing wrong idea no wood lathe wood turn ing Well what could used substitute Looking around shop work bench tool rack began see some possibilities drill press stand high speed about 2000 rpm 1/4-in electric drill mounted it type drill holding sembly can removed its normal vertical position remounted horizon tally work bench equipped vise tool rack several sizes wood chisels miscellaneous box yielded arbor 1/4 shank mounting drill chuck arbor type used mounting grinding wire wheels use electric drill needed find something could clamped vise serve tool rest scrap metal box gave up small length 2 aluminum iron angle stock Instead taking through lengthy explanation cowl rings turned out accompanying photos captions provided outline step step procedures Before proceeding please note followingcontinued page 12 August1975 11 Cowl rings full cowls can made tools found average modelers workshop takes little patience practice See text details follow eight steps shown Step 4 Turn electric drill using drill trigger lock set continuous run position Start shaping holding chisel Iflat back side chisel facing up flat tool rest slowly apply spinning disc word cautiondo try take heavy cuts chance ruining disc also danger chisel being pulled hand Slow easy does Step 5 outside shaping completed change tool rest position faces front disc Now cut inside material away starting near arbor working toward inside diameter line Remove center section material until approximately 1/4 thickness remains inner diameter line Shaping chisel now complete Engine Cowl Rings Balsa Blocks drill press stand type de scribed available large bench vise might used holding drill photos show cowl ring 3/4 thickness being made much deeper full cowl can made Perhaps youll want cowl 2-3 deep Well can made laminating several thick nesses balsa Lets say youre using 3/4 thick balsa want turn out cowl 2 1/4 deep 3 1/2 in diameter means three pieces 3/4 thick balsa must laminated Because arbor used will ac commodate 3/4 thickness proceed follows Make up three 3/4 thick 4 squares mark appropriate inside outside diameter lines Take marked up squares make disc outlined Steps 2 Set disc aside now Next cut two re maining squares along outside diam eter line form two discs also cut out center sections turning discs two balsa rings Now glue white glue will fine two rings disc certain glue completely set mount assembly arbor shape cowl follow ing remaining Steps 3 8 Now tools gathered gether few pieces balsa little prac tice youre way toward production perfectly round cowls 12 Model Aviation Author turns out full cowl Text contains details preparing balsa disc rings required full cowl project Step 6 Complete shaping lightly applying non-clogging 200 grit sandpaper both inside Out spinning disc Finish sanding 400-500 grit sandpaper Step 7 shaping sanding completed remove arbor disc assembly electric drill remove arbor disc Now using saw cut Out center section finish inside edge hand sand-Step 8 Completed cowl ring shown mounted plane prime coated ing fine sandpaperand ready painting
Edition: Model Aviation - 1975/08
Page Numbers: 10, 11, 12
Edition: Model Aviation - 1975/08
Page Numbers: 10, 11, 12
HOW TO MAKE COWL RNGS Bill Boss wthout athe Step 3 Now put arbor balsa disc assembly electric drill sure direction rotation drill direction arrow shown disc Next position drill press assembly vise approximately 1/2 clearance between disc angle tool rest tool rest about center disc Clamp units firmly place 10 Model Aviation Step 1 initial step making nose cowl ring determine proper size mark up balsa block rings representing inside outside diameters cowl Using saw cut along out side ring remove excess balsaa disc remains Step 2 Drill hole appropriate size center disc mount arbor have lathe set use same turning procedure have no lathe youll have scrounge substitute perhaps electric drill did author DURING THE COURSE building model plane always task seems little troublesome rest recently came across such task constructing newly designed Carrier plane task making perfectly round properly-shaped cowl ring balsa After couple very poor attempts hand carving shaping sandpaper decided way solve problem would turn out ring wood lathe thing wrong idea no wood lathe wood turn ing Well what could used substitute Looking around shop work bench tool rack began see some possibilities drill press stand high speed about 2000 rpm 1/4-in electric drill mounted it type drill holding sembly can removed its normal vertical position remounted horizon tally work bench equipped vise tool rack several sizes wood chisels miscellaneous box yielded arbor 1/4 shank mounting drill chuck arbor type used mounting grinding wire wheels use electric drill needed find something could clamped vise serve tool rest scrap metal box gave up small length 2 aluminum iron angle stock Instead taking through lengthy explanation cowl rings turned out accompanying photos captions provided outline step step procedures Before proceeding please note followingcontinued page 12 August1975 11 Cowl rings full cowls can made tools found average modelers workshop takes little patience practice See text details follow eight steps shown Step 4 Turn electric drill using drill trigger lock set continuous run position Start shaping holding chisel Iflat back side chisel facing up flat tool rest slowly apply spinning disc word cautiondo try take heavy cuts chance ruining disc also danger chisel being pulled hand Slow easy does Step 5 outside shaping completed change tool rest position faces front disc Now cut inside material away starting near arbor working toward inside diameter line Remove center section material until approximately 1/4 thickness remains inner diameter line Shaping chisel now complete Engine Cowl Rings Balsa Blocks drill press stand type de scribed available large bench vise might used holding drill photos show cowl ring 3/4 thickness being made much deeper full cowl can made Perhaps youll want cowl 2-3 deep Well can made laminating several thick nesses balsa Lets say youre using 3/4 thick balsa want turn out cowl 2 1/4 deep 3 1/2 in diameter means three pieces 3/4 thick balsa must laminated Because arbor used will ac commodate 3/4 thickness proceed follows Make up three 3/4 thick 4 squares mark appropriate inside outside diameter lines Take marked up squares make disc outlined Steps 2 Set disc aside now Next cut two re maining squares along outside diam eter line form two discs also cut out center sections turning discs two balsa rings Now glue white glue will fine two rings disc certain glue completely set mount assembly arbor shape cowl follow ing remaining Steps 3 8 Now tools gathered gether few pieces balsa little prac tice youre way toward production perfectly round cowls 12 Model Aviation Author turns out full cowl Text contains details preparing balsa disc rings required full cowl project Step 6 Complete shaping lightly applying non-clogging 200 grit sandpaper both inside Out spinning disc Finish sanding 400-500 grit sandpaper Step 7 shaping sanding completed remove arbor disc assembly electric drill remove arbor disc Now using saw cut Out center section finish inside edge hand sand-Step 8 Completed cowl ring shown mounted plane prime coated ing fine sandpaperand ready painting
Edition: Model Aviation - 1975/08
Page Numbers: 10, 11, 12
HOW TO MAKE COWL RNGS Bill Boss wthout athe Step 3 Now put arbor balsa disc assembly electric drill sure direction rotation drill direction arrow shown disc Next position drill press assembly vise approximately 1/2 clearance between disc angle tool rest tool rest about center disc Clamp units firmly place 10 Model Aviation Step 1 initial step making nose cowl ring determine proper size mark up balsa block rings representing inside outside diameters cowl Using saw cut along out side ring remove excess balsaa disc remains Step 2 Drill hole appropriate size center disc mount arbor have lathe set use same turning procedure have no lathe youll have scrounge substitute perhaps electric drill did author DURING THE COURSE building model plane always task seems little troublesome rest recently came across such task constructing newly designed Carrier plane task making perfectly round properly-shaped cowl ring balsa After couple very poor attempts hand carving shaping sandpaper decided way solve problem would turn out ring wood lathe thing wrong idea no wood lathe wood turn ing Well what could used substitute Looking around shop work bench tool rack began see some possibilities drill press stand high speed about 2000 rpm 1/4-in electric drill mounted it type drill holding sembly can removed its normal vertical position remounted horizon tally work bench equipped vise tool rack several sizes wood chisels miscellaneous box yielded arbor 1/4 shank mounting drill chuck arbor type used mounting grinding wire wheels use electric drill needed find something could clamped vise serve tool rest scrap metal box gave up small length 2 aluminum iron angle stock Instead taking through lengthy explanation cowl rings turned out accompanying photos captions provided outline step step procedures Before proceeding please note followingcontinued page 12 August1975 11 Cowl rings full cowls can made tools found average modelers workshop takes little patience practice See text details follow eight steps shown Step 4 Turn electric drill using drill trigger lock set continuous run position Start shaping holding chisel Iflat back side chisel facing up flat tool rest slowly apply spinning disc word cautiondo try take heavy cuts chance ruining disc also danger chisel being pulled hand Slow easy does Step 5 outside shaping completed change tool rest position faces front disc Now cut inside material away starting near arbor working toward inside diameter line Remove center section material until approximately 1/4 thickness remains inner diameter line Shaping chisel now complete Engine Cowl Rings Balsa Blocks drill press stand type de scribed available large bench vise might used holding drill photos show cowl ring 3/4 thickness being made much deeper full cowl can made Perhaps youll want cowl 2-3 deep Well can made laminating several thick nesses balsa Lets say youre using 3/4 thick balsa want turn out cowl 2 1/4 deep 3 1/2 in diameter means three pieces 3/4 thick balsa must laminated Because arbor used will ac commodate 3/4 thickness proceed follows Make up three 3/4 thick 4 squares mark appropriate inside outside diameter lines Take marked up squares make disc outlined Steps 2 Set disc aside now Next cut two re maining squares along outside diam eter line form two discs also cut out center sections turning discs two balsa rings Now glue white glue will fine two rings disc certain glue completely set mount assembly arbor shape cowl follow ing remaining Steps 3 8 Now tools gathered gether few pieces balsa little prac tice youre way toward production perfectly round cowls 12 Model Aviation Author turns out full cowl Text contains details preparing balsa disc rings required full cowl project Step 6 Complete shaping lightly applying non-clogging 200 grit sandpaper both inside Out spinning disc Finish sanding 400-500 grit sandpaper Step 7 shaping sanding completed remove arbor disc assembly electric drill remove arbor disc Now using saw cut Out center section finish inside edge hand sand-Step 8 Completed cowl ring shown mounted plane prime coated ing fine sandpaperand ready painting
