shelved because problem emerged dur ing planning stage Numerous early planes some later types en gine cowls covered ventilation louvers numbering hundreds Without conspicuous details plane loses char acter sport-scale model Louvers can easily puched hard Scale0 10 thick aluminum preferred ma terial printers offset aluminum sheets used local small newspapers sheet usually size opened news paper After using sheets print edition discarded scrap vir tual bonanza minimum cost material usually 25 50 cents per sheet resi due printers ink can easily removed modelers universal solvent dope thinner etched surface contin ues show traces latest news can inside cowl leaving outer surface polished unmarked Whole airplanes have successfully covered material can also oc casionally found 005 thickness tin shear will cut material easily leaves somewhat ragged edge sta tioners paper cutter produces de sirable cut edge finely finished ap pearance takes enamel very well greatest permanence fuel resist ance should baked method explored uses Cnntinupd arp-edged lathe tool used cutting edge piercing louver Just right tool carved notch shaped form louver 3 The hinged blocks swung apart hinge die right end punch left photos Bob Wischer 4 Hardwood blocks position brought together forming louver Punched alumi num sheet pulled forward expose die area 5 Finished cowl side authors Douglas Mailplane Rivet detail shown embossed aluminum pin driven weight uni form impressions Note cowl fasteners PUNCHING LOUVERS sheet metal louvered engine cowl first glance may seem impossible task reproduce miniature scale projects have postponed permanently October1977 21 U O Bob Dolly Wischer 1 Louvers too difficult imitate First punch see text complete details sol dered steel back-up plate Assembly con tact cemented pinned block City Thanks Northwood ks MIAMA anks NIMAS See again next year Ed Whitten Box 176 Wall Street Sta tionNYC NY JOOOS FF Scale/Wischers continued page 21 materials easily obtainable likely found modelers work shops Requirements two hardwood blocks cabinet hinge hard piece metal such lathe cutting tool two scraps steel two pins made short lengths music wire wood screws hinge example shown photos hardwood blocks cut -birch 3 wide 1 longer aluminum cowl length slot cut across width block 1 its end fit lathe tool tightly should press fit block should set flush surface pressed place lathe tool used because extremely hard material will wear along its cutting edge tool available piece steel such 3/8-sq key stock may substituted since likely wear out during few operations made producing single louvered cowl notch cut lower wood block adjacent steel tool notch should approximate external shape louver punched can made X-acto knife louvers cut sequence form continu ous row second notch needed toward end block notch can cut across full width block shown photo Its spacing first notch determines exact spacing tween louvers row row louvers cut relief notch must also made along length block avoid flattening previous row completes die half tool punch cuts through alumi num filed strip steel ex act shape louver punch sweat soldered l/16-thick steel back up plate assembly will cemented pinned upper block later steps two blocks now hinged together end opposite notches drilling screw holes hinge blocks should spaced apart same amount thickness back-up plate punch now laid notch loosely hinged blocks brought together alignment Mark approxi mate location back-up plate upper block spread strong contact cement such Walthers Goo back-up plate marked off area wood Allow ten minutes ce ment dry punch set posi tion its notch bring blocks together R/C Buyers Guide new third edition just released Includes listings 2000 RC products Aircraft boats cars radio sys tems accessory items pictured de scribed 200 manufacturers represented Included descriptions new products displayed years trade shows Listings include important information retail prices Suggested retail price $425 hobby stores $500 postpaid Boyn ton & Associates Clifton House Clifton VA 22024 product review product review product review cemented areas make contact tool closed perfect alignment should result between punch die Dowel back-up plate upper block short lengths 3/32-dia music wire prevent possible shifting Test operation scrap alumi num sharp blow fist hammer will drive punch through alumi num forming louver evidence tearing notching along cut edge usually indicates too much clearance tween punch die clearance easily adjustable means paper shims inserted between lower hinge leaf block case stubbing due inter ference between punch die shims would inserted opposite side hinge Shims will very likely re quired because low quality fit pin cabinet hinge heavy paper about 003 thick provides useful incremental changes fine tuning possible thinner paper may sound like large project able produce tool help table saw slightly hour single cowl side punched 48 perfectly spaced uniform louvers produced 30 minutes Alter nate methods such fake glued-on strips would have taken much longer doubt ful quality end result An obvious benefit louvers functional prototype total area 150 ventilation slots sufficient cool 60 engine Douglas Mailplane properly cool engine enclosed cowl baffle arrangement control direct flow air through cylinder fins absolute necessity can made aluminum plywood baffle should fit cylinder closely force incoming air flow past through fins effect desired similar used full-size planes opening entering air larger baffle opening around engine creates pressure cowl effec tively forces air past fins velocity greater slipstream desirable air outlet behind en gine have area larger inlet least larger baffle bypass area case louvered cowl total area louvers keeping mind swarm small louvers may somewhat lacking efficiency com pared larger smoother openings thin aluminum used baf fle needs braced cannot deflect due pressure Deflection will spoil effectiveness permit incoming air find path lesser resistance rather flowing through fins overheated engine sagged during flight found reason After bracing baffle immediate improvement Mounting cowled engine too close firewall causes damming effect obstructing air flow can result 84 Model Aviation product review product review product review PRO DUCTS NC SVILLE ROAD OW GROVE PA 19090 6593900 Weve Got Lot SHOUT ABOUT Patented patented patented just about products pa tented Thats because theres someSUPERSTAR OF STARTERS thing unique about SomeSales zooming past 100000 starter thing better Take products thats turned whole world Has instance Better yet go dealer higher torque & RPMs heavy duty buy long life motor instant-on strip switch safety hand guard 2-year guarantee CHARGER FOR SUPER/GEL & OTHERS Ideal teammate Super-Gel battery Can also used wet cell batteries UL Listed plugs dinary house current Fully charges battery 12 hours 500 ma output overheating Bob Wischer Rt 1 S-221 Lapham Peak Rd Delafield WI 53018 CL Scale/Stott continued page 30 other words have h-in grid paper assuming multiple 4 squares plan paper would 1 in size multiple 5 squares would drawn 1 transfer drawing treat square individual picture copy lines curves grid squares squares drawing paper Take time sure have everything down correctly lines crossing proper places third method again need know multiplier also need pair dividers Dividers measuring instruments used frequently draftsmen engineers can obtained local office supply store method first need draw center thrust-line plan paper will work off line fuse lage side view Picking various points pref erably cross sections former loca tions 3-views position dividers point spinner back plate other point first former cross section 3-views changing setting dividers go thrust-line drawn plan paper still assuming multiple 4 measure out four segments space will location first former cross section picked out 3-view Height width length items 3-views can done manner feel method least accurate difficult three have de scribed Mike Stoti 118 F Wheeler St North Mankato MN 56001 RC Soaring/Pruss continued page 22 grees plus wind light Neil esti mates never over 1500 feet en tire flight Further details about Level V show contest wins must have three out six contests 20 people Soarcraft/Windspiel Kestral 19 plane has flown competitively three years modification kit own gap-type spoiler system Neil recorded 11 contests order get wins points required six just happened LSF Tourna ment last year took second place out 124 two-hour thermal flight grabbed opportunities Neil tells out local field sport flying weekend launched wifes Centurion II check out before turning loose grabbed bubble went 15-20 minutes sug gested try two-hour thermal flight rather bring down fly continued working lift Neil goes about hour final ap proach landing area about 20 feet Flashing Wing Tail Lights Adding excite ment realism flying clever item also can add scale points competition Operates low 45v uses IC four LEDs 2 red 1 green 1 amber draws little current Fully wired tested Price $15 Vein Zundel 4956 Tiemann Ave St Louis MO 63123 product review product review product review October 1977 85 product review product review product review
Edition: Model Aviation - 1977/10
Page Numbers: 21, 84, 85
shelved because problem emerged dur ing planning stage Numerous early planes some later types en gine cowls covered ventilation louvers numbering hundreds Without conspicuous details plane loses char acter sport-scale model Louvers can easily puched hard Scale0 10 thick aluminum preferred ma terial printers offset aluminum sheets used local small newspapers sheet usually size opened news paper After using sheets print edition discarded scrap vir tual bonanza minimum cost material usually 25 50 cents per sheet resi due printers ink can easily removed modelers universal solvent dope thinner etched surface contin ues show traces latest news can inside cowl leaving outer surface polished unmarked Whole airplanes have successfully covered material can also oc casionally found 005 thickness tin shear will cut material easily leaves somewhat ragged edge sta tioners paper cutter produces de sirable cut edge finely finished ap pearance takes enamel very well greatest permanence fuel resist ance should baked method explored uses Cnntinupd arp-edged lathe tool used cutting edge piercing louver Just right tool carved notch shaped form louver 3 The hinged blocks swung apart hinge die right end punch left photos Bob Wischer 4 Hardwood blocks position brought together forming louver Punched alumi num sheet pulled forward expose die area 5 Finished cowl side authors Douglas Mailplane Rivet detail shown embossed aluminum pin driven weight uni form impressions Note cowl fasteners PUNCHING LOUVERS sheet metal louvered engine cowl first glance may seem impossible task reproduce miniature scale projects have postponed permanently October1977 21 U O Bob Dolly Wischer 1 Louvers too difficult imitate First punch see text complete details sol dered steel back-up plate Assembly con tact cemented pinned block City Thanks Northwood ks MIAMA anks NIMAS See again next year Ed Whitten Box 176 Wall Street Sta tionNYC NY JOOOS FF Scale/Wischers continued page 21 materials easily obtainable likely found modelers work shops Requirements two hardwood blocks cabinet hinge hard piece metal such lathe cutting tool two scraps steel two pins made short lengths music wire wood screws hinge example shown photos hardwood blocks cut -birch 3 wide 1 longer aluminum cowl length slot cut across width block 1 its end fit lathe tool tightly should press fit block should set flush surface pressed place lathe tool used because extremely hard material will wear along its cutting edge tool available piece steel such 3/8-sq key stock may substituted since likely wear out during few operations made producing single louvered cowl notch cut lower wood block adjacent steel tool notch should approximate external shape louver punched can made X-acto knife louvers cut sequence form continu ous row second notch needed toward end block notch can cut across full width block shown photo Its spacing first notch determines exact spacing tween louvers row row louvers cut relief notch must also made along length block avoid flattening previous row completes die half tool punch cuts through alumi num filed strip steel ex act shape louver punch sweat soldered l/16-thick steel back up plate assembly will cemented pinned upper block later steps two blocks now hinged together end opposite notches drilling screw holes hinge blocks should spaced apart same amount thickness back-up plate punch now laid notch loosely hinged blocks brought together alignment Mark approxi mate location back-up plate upper block spread strong contact cement such Walthers Goo back-up plate marked off area wood Allow ten minutes ce ment dry punch set posi tion its notch bring blocks together R/C Buyers Guide new third edition just released Includes listings 2000 RC products Aircraft boats cars radio sys tems accessory items pictured de scribed 200 manufacturers represented Included descriptions new products displayed years trade shows Listings include important information retail prices Suggested retail price $425 hobby stores $500 postpaid Boyn ton & Associates Clifton House Clifton VA 22024 product review product review product review cemented areas make contact tool closed perfect alignment should result between punch die Dowel back-up plate upper block short lengths 3/32-dia music wire prevent possible shifting Test operation scrap alumi num sharp blow fist hammer will drive punch through alumi num forming louver evidence tearing notching along cut edge usually indicates too much clearance tween punch die clearance easily adjustable means paper shims inserted between lower hinge leaf block case stubbing due inter ference between punch die shims would inserted opposite side hinge Shims will very likely re quired because low quality fit pin cabinet hinge heavy paper about 003 thick provides useful incremental changes fine tuning possible thinner paper may sound like large project able produce tool help table saw slightly hour single cowl side punched 48 perfectly spaced uniform louvers produced 30 minutes Alter nate methods such fake glued-on strips would have taken much longer doubt ful quality end result An obvious benefit louvers functional prototype total area 150 ventilation slots sufficient cool 60 engine Douglas Mailplane properly cool engine enclosed cowl baffle arrangement control direct flow air through cylinder fins absolute necessity can made aluminum plywood baffle should fit cylinder closely force incoming air flow past through fins effect desired similar used full-size planes opening entering air larger baffle opening around engine creates pressure cowl effec tively forces air past fins velocity greater slipstream desirable air outlet behind en gine have area larger inlet least larger baffle bypass area case louvered cowl total area louvers keeping mind swarm small louvers may somewhat lacking efficiency com pared larger smoother openings thin aluminum used baf fle needs braced cannot deflect due pressure Deflection will spoil effectiveness permit incoming air find path lesser resistance rather flowing through fins overheated engine sagged during flight found reason After bracing baffle immediate improvement Mounting cowled engine too close firewall causes damming effect obstructing air flow can result 84 Model Aviation product review product review product review PRO DUCTS NC SVILLE ROAD OW GROVE PA 19090 6593900 Weve Got Lot SHOUT ABOUT Patented patented patented just about products pa tented Thats because theres someSUPERSTAR OF STARTERS thing unique about SomeSales zooming past 100000 starter thing better Take products thats turned whole world Has instance Better yet go dealer higher torque & RPMs heavy duty buy long life motor instant-on strip switch safety hand guard 2-year guarantee CHARGER FOR SUPER/GEL & OTHERS Ideal teammate Super-Gel battery Can also used wet cell batteries UL Listed plugs dinary house current Fully charges battery 12 hours 500 ma output overheating Bob Wischer Rt 1 S-221 Lapham Peak Rd Delafield WI 53018 CL Scale/Stott continued page 30 other words have h-in grid paper assuming multiple 4 squares plan paper would 1 in size multiple 5 squares would drawn 1 transfer drawing treat square individual picture copy lines curves grid squares squares drawing paper Take time sure have everything down correctly lines crossing proper places third method again need know multiplier also need pair dividers Dividers measuring instruments used frequently draftsmen engineers can obtained local office supply store method first need draw center thrust-line plan paper will work off line fuse lage side view Picking various points pref erably cross sections former loca tions 3-views position dividers point spinner back plate other point first former cross section 3-views changing setting dividers go thrust-line drawn plan paper still assuming multiple 4 measure out four segments space will location first former cross section picked out 3-view Height width length items 3-views can done manner feel method least accurate difficult three have de scribed Mike Stoti 118 F Wheeler St North Mankato MN 56001 RC Soaring/Pruss continued page 22 grees plus wind light Neil esti mates never over 1500 feet en tire flight Further details about Level V show contest wins must have three out six contests 20 people Soarcraft/Windspiel Kestral 19 plane has flown competitively three years modification kit own gap-type spoiler system Neil recorded 11 contests order get wins points required six just happened LSF Tourna ment last year took second place out 124 two-hour thermal flight grabbed opportunities Neil tells out local field sport flying weekend launched wifes Centurion II check out before turning loose grabbed bubble went 15-20 minutes sug gested try two-hour thermal flight rather bring down fly continued working lift Neil goes about hour final ap proach landing area about 20 feet Flashing Wing Tail Lights Adding excite ment realism flying clever item also can add scale points competition Operates low 45v uses IC four LEDs 2 red 1 green 1 amber draws little current Fully wired tested Price $15 Vein Zundel 4956 Tiemann Ave St Louis MO 63123 product review product review product review October 1977 85 product review product review product review
Edition: Model Aviation - 1977/10
Page Numbers: 21, 84, 85
shelved because problem emerged dur ing planning stage Numerous early planes some later types en gine cowls covered ventilation louvers numbering hundreds Without conspicuous details plane loses char acter sport-scale model Louvers can easily puched hard Scale0 10 thick aluminum preferred ma terial printers offset aluminum sheets used local small newspapers sheet usually size opened news paper After using sheets print edition discarded scrap vir tual bonanza minimum cost material usually 25 50 cents per sheet resi due printers ink can easily removed modelers universal solvent dope thinner etched surface contin ues show traces latest news can inside cowl leaving outer surface polished unmarked Whole airplanes have successfully covered material can also oc casionally found 005 thickness tin shear will cut material easily leaves somewhat ragged edge sta tioners paper cutter produces de sirable cut edge finely finished ap pearance takes enamel very well greatest permanence fuel resist ance should baked method explored uses Cnntinupd arp-edged lathe tool used cutting edge piercing louver Just right tool carved notch shaped form louver 3 The hinged blocks swung apart hinge die right end punch left photos Bob Wischer 4 Hardwood blocks position brought together forming louver Punched alumi num sheet pulled forward expose die area 5 Finished cowl side authors Douglas Mailplane Rivet detail shown embossed aluminum pin driven weight uni form impressions Note cowl fasteners PUNCHING LOUVERS sheet metal louvered engine cowl first glance may seem impossible task reproduce miniature scale projects have postponed permanently October1977 21 U O Bob Dolly Wischer 1 Louvers too difficult imitate First punch see text complete details sol dered steel back-up plate Assembly con tact cemented pinned block City Thanks Northwood ks MIAMA anks NIMAS See again next year Ed Whitten Box 176 Wall Street Sta tionNYC NY JOOOS FF Scale/Wischers continued page 21 materials easily obtainable likely found modelers work shops Requirements two hardwood blocks cabinet hinge hard piece metal such lathe cutting tool two scraps steel two pins made short lengths music wire wood screws hinge example shown photos hardwood blocks cut -birch 3 wide 1 longer aluminum cowl length slot cut across width block 1 its end fit lathe tool tightly should press fit block should set flush surface pressed place lathe tool used because extremely hard material will wear along its cutting edge tool available piece steel such 3/8-sq key stock may substituted since likely wear out during few operations made producing single louvered cowl notch cut lower wood block adjacent steel tool notch should approximate external shape louver punched can made X-acto knife louvers cut sequence form continu ous row second notch needed toward end block notch can cut across full width block shown photo Its spacing first notch determines exact spacing tween louvers row row louvers cut relief notch must also made along length block avoid flattening previous row completes die half tool punch cuts through alumi num filed strip steel ex act shape louver punch sweat soldered l/16-thick steel back up plate assembly will cemented pinned upper block later steps two blocks now hinged together end opposite notches drilling screw holes hinge blocks should spaced apart same amount thickness back-up plate punch now laid notch loosely hinged blocks brought together alignment Mark approxi mate location back-up plate upper block spread strong contact cement such Walthers Goo back-up plate marked off area wood Allow ten minutes ce ment dry punch set posi tion its notch bring blocks together R/C Buyers Guide new third edition just released Includes listings 2000 RC products Aircraft boats cars radio sys tems accessory items pictured de scribed 200 manufacturers represented Included descriptions new products displayed years trade shows Listings include important information retail prices Suggested retail price $425 hobby stores $500 postpaid Boyn ton & Associates Clifton House Clifton VA 22024 product review product review product review cemented areas make contact tool closed perfect alignment should result between punch die Dowel back-up plate upper block short lengths 3/32-dia music wire prevent possible shifting Test operation scrap alumi num sharp blow fist hammer will drive punch through alumi num forming louver evidence tearing notching along cut edge usually indicates too much clearance tween punch die clearance easily adjustable means paper shims inserted between lower hinge leaf block case stubbing due inter ference between punch die shims would inserted opposite side hinge Shims will very likely re quired because low quality fit pin cabinet hinge heavy paper about 003 thick provides useful incremental changes fine tuning possible thinner paper may sound like large project able produce tool help table saw slightly hour single cowl side punched 48 perfectly spaced uniform louvers produced 30 minutes Alter nate methods such fake glued-on strips would have taken much longer doubt ful quality end result An obvious benefit louvers functional prototype total area 150 ventilation slots sufficient cool 60 engine Douglas Mailplane properly cool engine enclosed cowl baffle arrangement control direct flow air through cylinder fins absolute necessity can made aluminum plywood baffle should fit cylinder closely force incoming air flow past through fins effect desired similar used full-size planes opening entering air larger baffle opening around engine creates pressure cowl effec tively forces air past fins velocity greater slipstream desirable air outlet behind en gine have area larger inlet least larger baffle bypass area case louvered cowl total area louvers keeping mind swarm small louvers may somewhat lacking efficiency com pared larger smoother openings thin aluminum used baf fle needs braced cannot deflect due pressure Deflection will spoil effectiveness permit incoming air find path lesser resistance rather flowing through fins overheated engine sagged during flight found reason After bracing baffle immediate improvement Mounting cowled engine too close firewall causes damming effect obstructing air flow can result 84 Model Aviation product review product review product review PRO DUCTS NC SVILLE ROAD OW GROVE PA 19090 6593900 Weve Got Lot SHOUT ABOUT Patented patented patented just about products pa tented Thats because theres someSUPERSTAR OF STARTERS thing unique about SomeSales zooming past 100000 starter thing better Take products thats turned whole world Has instance Better yet go dealer higher torque & RPMs heavy duty buy long life motor instant-on strip switch safety hand guard 2-year guarantee CHARGER FOR SUPER/GEL & OTHERS Ideal teammate Super-Gel battery Can also used wet cell batteries UL Listed plugs dinary house current Fully charges battery 12 hours 500 ma output overheating Bob Wischer Rt 1 S-221 Lapham Peak Rd Delafield WI 53018 CL Scale/Stott continued page 30 other words have h-in grid paper assuming multiple 4 squares plan paper would 1 in size multiple 5 squares would drawn 1 transfer drawing treat square individual picture copy lines curves grid squares squares drawing paper Take time sure have everything down correctly lines crossing proper places third method again need know multiplier also need pair dividers Dividers measuring instruments used frequently draftsmen engineers can obtained local office supply store method first need draw center thrust-line plan paper will work off line fuse lage side view Picking various points pref erably cross sections former loca tions 3-views position dividers point spinner back plate other point first former cross section 3-views changing setting dividers go thrust-line drawn plan paper still assuming multiple 4 measure out four segments space will location first former cross section picked out 3-view Height width length items 3-views can done manner feel method least accurate difficult three have de scribed Mike Stoti 118 F Wheeler St North Mankato MN 56001 RC Soaring/Pruss continued page 22 grees plus wind light Neil esti mates never over 1500 feet en tire flight Further details about Level V show contest wins must have three out six contests 20 people Soarcraft/Windspiel Kestral 19 plane has flown competitively three years modification kit own gap-type spoiler system Neil recorded 11 contests order get wins points required six just happened LSF Tourna ment last year took second place out 124 two-hour thermal flight grabbed opportunities Neil tells out local field sport flying weekend launched wifes Centurion II check out before turning loose grabbed bubble went 15-20 minutes sug gested try two-hour thermal flight rather bring down fly continued working lift Neil goes about hour final ap proach landing area about 20 feet Flashing Wing Tail Lights Adding excite ment realism flying clever item also can add scale points competition Operates low 45v uses IC four LEDs 2 red 1 green 1 amber draws little current Fully wired tested Price $15 Vein Zundel 4956 Tiemann Ave St Louis MO 63123 product review product review product review October 1977 85 product review product review product review