FOkkCk D-23 control-line twin has no engine-out problems will perform entire stunt pattern 28 Model Aviation Dick Sarpolus FOKKER D-23 Whats what country red white blue orange insignia com ments hear flying model course scale modelers try hard find unusual subjects model aircraft developed built Dutch prior World War II single-seat fighter testing proved good go produc tion Dutch front-line fighter 1942 Nazi invasion Nether lands cancelled plans plane never produced Performance figures impressive time period powered two Sagitta V-12 570-hp engines wing span 34 8 length 32 6 top speed excess 373 mph proposed armament four 79-mm Browning machine guns would have made formidable fighting machine overall configuration looked like would make good flying control-line model model naturally standway-off scale profile fuselage con figuration insure good pattern flying characteristics large wing full flap/ elevator controls generous tail area etc incorporated model configu ration Original intention power use two 19s however balance rea sons went 35 nose 15 pusher As designed model balanced perfectly color scheme used Dutch three-color camouflagedark brown tan dark green could find black white pictures original apparently used camouflage typical Dutch planes time illustrate problems scale modelers located two good 3-view drawings D-23 differed considerably other major areas Comparing threeviews several photos selected drawing appeared like photos Although model profile good paint job sufficient detailing added makes nice appearing ship Advantage profile construc tion course simplicity speed construction Flight performance good model will full stunt patternnot well real pattern model good enough casual flier sound two engines added excitement bonus 15 stops model flies 35 will reasonable maneuvers just front engine running 35 stopped first assume model would barely fly gently land havent happen yet wanting complexity second engine 35 alone free spinning rear prop would good way go am bitious modeler fuselage could built up rather profile Basic sides bulkheads shaped blocks top bottom pas tic canopy work better looking ship Enough scale information sales pitch want distinctive easy twin get good supply wood well pro ceed some construction comments believe best cut out necessary parts before starting build Make own kit first rather cut go wood sizes standard mate rial should available reasonable hobby shop wing standard shaped leading trailing edge stock should purchased save lot carving V2 balsa fuselage edge-glued 3 4 wide stock get necessary width Landing gears always problem Vt wire too hard work wire bender makes easy can al Front engine aid dependable Fox 35 Tank 3-ozmany market just sure use correct type 3-blade prop show Dick flies 10 x 6 two blader used DuBro muffler front en gine chosen smallness lightness Opposite page two-color camouflage al makes forget its profile fast heavily armed fighter D-23 set production time Nazi invasion An OS 15 pusher engine maintains flight its own Note fuel feed Ignore wire locked RC throttle Dicks engine Grish has molded nylon Tornado pusher props used 8 x 6what found shop Didnt have rear muffler pix taken December1976 29 NO OCR TEXT Fokker 0-23 ways clamp vise go work hammer Well discuss wing first because dont like build wings So first get out way notched fulldepth spar notched ribs about easiest way get good strong wing No planking cap strips model Notching leading trailing edges work could omitted believe increase strength worth Block up ribs carefully building wing good flat work surface sure no warps get built Epoxy landing gear blocks plywood dou blers bellcrank mount pieces take lot stress center-section planking mod els due twin-boom layout flaps necessary good stunt performance troublesome must made four sections sure sections lined up other move freely binding Tail surfaces require much com ment simply cut 3/16 balsa sheet sanded shape gen eral comment sand better model will look Try airfoiled section stab rudders round off boomsand really round off profile fuselage Dont leave square edges tail booms made three pieces a conserve wood make plane easier assemble Use firm wood booms rather small sections fuselage easy thats building profile Space /8 X wood motor mounts suit engines better appearance install blind nuts engine mounting bolts before add 1/16 plywood fuse lage doublers use epoxy motor mounts plywood doublers because engine vibration December 1976 31 covering wont hide doubtful Construction model Note nicely can fill feather joints between doublers balsa Model can maneuvers front engine alone two really moves out Live action quick reaction continued page 79 engines over place Dont forget rear prop tuning front engine Note Dutch markings wing rudders CL Combat/Johnson continued page 23 idea Slow Combat slow event down speed-wise make slow event dull Current planes inboard tanks super-short nose mo ments full-race engines far outclass Sunday fliers plane Some other proposals eliminate rules either unnecessary enforce able may build same old thing regardless rules remember opponent may take advantage ev ery loophole give treatment AT OUR ANNUAL contest tried new method airplane/line processing new us anyway set up pit area big enough planes first round plane next opposing flying order according draw tightly stretched string marked point center models two strings marked plus-or-minus 6-in area Length thickness pull tests easily accomplished passing out streamers tremendously speeds up show also makes safe place park model lines out helping friends though contest ants knew thorough processing fac ing two tried get away long lines two undersize 015s Fast Combat joker tried tell us HP 40 really 36 because put short rod Event Director asked him what size thought hed have put rod out Chevy pickup Processing can real pain efficient organization can accom plish its goals keeping everyone safe honest no-kill rule tried Slow Com bat result being better overall matches new problem arising contestant cuts string gets credit cut unable get points other through air time used mean playing dodge em remainder match As FAI Combat found guys taking couple quick cuts staying down rest match ha ha wont start engine variation trick fly inverted about foot off ground purely defensive move makes very interesting inverted team race impossible trailing plane catch other unless about 20 mph faster since leading pilot can whip block just like real Team Race Its legal about prayer guy has sporting Maybe CAC should have proposed giving points number laps completed lieve dark past rules limiting number level laps could fly must solution prob lem possibly new streamers WAM gives points close passes. y Actually think maneuver has its equivalency real air-to-air com bat Its called cowards way out THE BIG NEWS combat engines Fox 15 35 Very little known about 15 writing except comes various styles depending whether plain ball bearings em ployed Stubblefield used ball-bearing rear exhaust version win FAI Na tionals spy failed preduce pic ture engine 35 also won Nationals both Fast Slow Combat holding up remarkably well hands hackers could blow up engine having success too normal out-of-thebox use engine best mar ket sample tested did everything asked good starts power plus very easy plugswhich pock etbook will appreciate annoying thing need send off rich side blubbering rich youre running lot nitro quite rich lower nitro fuels problem tremendous amount revs picks up once unloaded air Literature packed box recommends pinching line keep engine cleaned out just before launch doesnt much accurate fuel metering want first up engine decides its time pinch tune shuffle Engines take thrust rear bearing such Fox seem exhibit unload ing Tigres take thrust front bearing An interesting experi ment machinists would set up Fox Tigre-type front end square venturi Combat Special also suspect love round yen turis since shape ultimately im portant mere size claim round venturi would solve some problems Next article Ill have answer because Im making couple venturi sets der plot size shape relation power fuel consumption smallest venturi will let engine reach its horsepower peak will also effi cient Most often larger venturi does nothing except make erratic needle set tings waste fuel Almost current racing engine will flow enough air/fuel mixture its standard venturi quite bit smaller B-Team Race models go over 110 mph 290 venturis would considered small Slow Combat engine majority top runners worry about producing power consistently flash horsepower over some part power curve MACA WILL BE running FAT Com bat Team selection find out FAI will going three-year cycle what year combat will held youre interested world class competi tion now time get started sides Tigre G-15 G-20 new side-port X-15 real strong performer probably equal Rossi Cox combat trim tune Gordon Delaney FAI Challenger consistently pulled streamer over 100 mph through turns just strong Charlie Johnson 3716 Ingraham St. San Diego CA 92109Tel 714-273-6530 Fokker/Sarpolus continued page 31 Overall assembly must done carefully insure true alignment will have straight flying aircraft First major assem bly step fuselage onto wing must perpendicular wing stalled using epoxy fiberglass cloth reinforce fuselage/wing joint leading edge fuselage flaps may added Prior putting booms wing install fins/rudders onto booms triangle stock stab mounts onto rudders Slide booms onto wing pin stab place rudders adjust booms keep stab level wing glue place Make up pushrod elevator mount landing gears install screweyes fuselage gas tank rubberband retainers suggest remove pos sible hardware re-installed after painting model use nylon hinges epoxy surfaces after parts have painted Everyone has own favorite finishing technique materials prefer sold Su per Coverite wing covering material recommend Wood surfaces prepared several coats clear dope sanding sealer sanding thoroughly between coats camouflage paint job spray gun airbrush almost necessity done brush masked off will look authentic Other de tailing panel lines done drafting pen rivets simulated mb-off dots windows painted etc will add finished model pusher 15 installed no offset front 35 installed two washers under front mounting lug Use well broken-in engines Run up en gine separately adjust needle valves top off tanks rear engine should set fairly lean tends richen air due tank location plane flies well no bad charac teristics December1976 79 COX ENGINES COX/SANWA RIC SYSTEMS AIRTRONICS KITS C Send complete catalog 1525 E Warner Ave Santa Ana CA 92702 HCBBIES A
Edition: Model Aviation - 1976/12
Page Numbers: 28, 29, 30, 31, 79
FOkkCk D-23 control-line twin has no engine-out problems will perform entire stunt pattern 28 Model Aviation Dick Sarpolus FOKKER D-23 Whats what country red white blue orange insignia com ments hear flying model course scale modelers try hard find unusual subjects model aircraft developed built Dutch prior World War II single-seat fighter testing proved good go produc tion Dutch front-line fighter 1942 Nazi invasion Nether lands cancelled plans plane never produced Performance figures impressive time period powered two Sagitta V-12 570-hp engines wing span 34 8 length 32 6 top speed excess 373 mph proposed armament four 79-mm Browning machine guns would have made formidable fighting machine overall configuration looked like would make good flying control-line model model naturally standway-off scale profile fuselage con figuration insure good pattern flying characteristics large wing full flap/ elevator controls generous tail area etc incorporated model configu ration Original intention power use two 19s however balance rea sons went 35 nose 15 pusher As designed model balanced perfectly color scheme used Dutch three-color camouflagedark brown tan dark green could find black white pictures original apparently used camouflage typical Dutch planes time illustrate problems scale modelers located two good 3-view drawings D-23 differed considerably other major areas Comparing threeviews several photos selected drawing appeared like photos Although model profile good paint job sufficient detailing added makes nice appearing ship Advantage profile construc tion course simplicity speed construction Flight performance good model will full stunt patternnot well real pattern model good enough casual flier sound two engines added excitement bonus 15 stops model flies 35 will reasonable maneuvers just front engine running 35 stopped first assume model would barely fly gently land havent happen yet wanting complexity second engine 35 alone free spinning rear prop would good way go am bitious modeler fuselage could built up rather profile Basic sides bulkheads shaped blocks top bottom pas tic canopy work better looking ship Enough scale information sales pitch want distinctive easy twin get good supply wood well pro ceed some construction comments believe best cut out necessary parts before starting build Make own kit first rather cut go wood sizes standard mate rial should available reasonable hobby shop wing standard shaped leading trailing edge stock should purchased save lot carving V2 balsa fuselage edge-glued 3 4 wide stock get necessary width Landing gears always problem Vt wire too hard work wire bender makes easy can al Front engine aid dependable Fox 35 Tank 3-ozmany market just sure use correct type 3-blade prop show Dick flies 10 x 6 two blader used DuBro muffler front en gine chosen smallness lightness Opposite page two-color camouflage al makes forget its profile fast heavily armed fighter D-23 set production time Nazi invasion An OS 15 pusher engine maintains flight its own Note fuel feed Ignore wire locked RC throttle Dicks engine Grish has molded nylon Tornado pusher props used 8 x 6what found shop Didnt have rear muffler pix taken December1976 29 NO OCR TEXT Fokker 0-23 ways clamp vise go work hammer Well discuss wing first because dont like build wings So first get out way notched fulldepth spar notched ribs about easiest way get good strong wing No planking cap strips model Notching leading trailing edges work could omitted believe increase strength worth Block up ribs carefully building wing good flat work surface sure no warps get built Epoxy landing gear blocks plywood dou blers bellcrank mount pieces take lot stress center-section planking mod els due twin-boom layout flaps necessary good stunt performance troublesome must made four sections sure sections lined up other move freely binding Tail surfaces require much com ment simply cut 3/16 balsa sheet sanded shape gen eral comment sand better model will look Try airfoiled section stab rudders round off boomsand really round off profile fuselage Dont leave square edges tail booms made three pieces a conserve wood make plane easier assemble Use firm wood booms rather small sections fuselage easy thats building profile Space /8 X wood motor mounts suit engines better appearance install blind nuts engine mounting bolts before add 1/16 plywood fuse lage doublers use epoxy motor mounts plywood doublers because engine vibration December 1976 31 covering wont hide doubtful Construction model Note nicely can fill feather joints between doublers balsa Model can maneuvers front engine alone two really moves out Live action quick reaction continued page 79 engines over place Dont forget rear prop tuning front engine Note Dutch markings wing rudders CL Combat/Johnson continued page 23 idea Slow Combat slow event down speed-wise make slow event dull Current planes inboard tanks super-short nose mo ments full-race engines far outclass Sunday fliers plane Some other proposals eliminate rules either unnecessary enforce able may build same old thing regardless rules remember opponent may take advantage ev ery loophole give treatment AT OUR ANNUAL contest tried new method airplane/line processing new us anyway set up pit area big enough planes first round plane next opposing flying order according draw tightly stretched string marked point center models two strings marked plus-or-minus 6-in area Length thickness pull tests easily accomplished passing out streamers tremendously speeds up show also makes safe place park model lines out helping friends though contest ants knew thorough processing fac ing two tried get away long lines two undersize 015s Fast Combat joker tried tell us HP 40 really 36 because put short rod Event Director asked him what size thought hed have put rod out Chevy pickup Processing can real pain efficient organization can accom plish its goals keeping everyone safe honest no-kill rule tried Slow Com bat result being better overall matches new problem arising contestant cuts string gets credit cut unable get points other through air time used mean playing dodge em remainder match As FAI Combat found guys taking couple quick cuts staying down rest match ha ha wont start engine variation trick fly inverted about foot off ground purely defensive move makes very interesting inverted team race impossible trailing plane catch other unless about 20 mph faster since leading pilot can whip block just like real Team Race Its legal about prayer guy has sporting Maybe CAC should have proposed giving points number laps completed lieve dark past rules limiting number level laps could fly must solution prob lem possibly new streamers WAM gives points close passes. y Actually think maneuver has its equivalency real air-to-air com bat Its called cowards way out THE BIG NEWS combat engines Fox 15 35 Very little known about 15 writing except comes various styles depending whether plain ball bearings em ployed Stubblefield used ball-bearing rear exhaust version win FAI Na tionals spy failed preduce pic ture engine 35 also won Nationals both Fast Slow Combat holding up remarkably well hands hackers could blow up engine having success too normal out-of-thebox use engine best mar ket sample tested did everything asked good starts power plus very easy plugswhich pock etbook will appreciate annoying thing need send off rich side blubbering rich youre running lot nitro quite rich lower nitro fuels problem tremendous amount revs picks up once unloaded air Literature packed box recommends pinching line keep engine cleaned out just before launch doesnt much accurate fuel metering want first up engine decides its time pinch tune shuffle Engines take thrust rear bearing such Fox seem exhibit unload ing Tigres take thrust front bearing An interesting experi ment machinists would set up Fox Tigre-type front end square venturi Combat Special also suspect love round yen turis since shape ultimately im portant mere size claim round venturi would solve some problems Next article Ill have answer because Im making couple venturi sets der plot size shape relation power fuel consumption smallest venturi will let engine reach its horsepower peak will also effi cient Most often larger venturi does nothing except make erratic needle set tings waste fuel Almost current racing engine will flow enough air/fuel mixture its standard venturi quite bit smaller B-Team Race models go over 110 mph 290 venturis would considered small Slow Combat engine majority top runners worry about producing power consistently flash horsepower over some part power curve MACA WILL BE running FAT Com bat Team selection find out FAI will going three-year cycle what year combat will held youre interested world class competi tion now time get started sides Tigre G-15 G-20 new side-port X-15 real strong performer probably equal Rossi Cox combat trim tune Gordon Delaney FAI Challenger consistently pulled streamer over 100 mph through turns just strong Charlie Johnson 3716 Ingraham St. San Diego CA 92109Tel 714-273-6530 Fokker/Sarpolus continued page 31 Overall assembly must done carefully insure true alignment will have straight flying aircraft First major assem bly step fuselage onto wing must perpendicular wing stalled using epoxy fiberglass cloth reinforce fuselage/wing joint leading edge fuselage flaps may added Prior putting booms wing install fins/rudders onto booms triangle stock stab mounts onto rudders Slide booms onto wing pin stab place rudders adjust booms keep stab level wing glue place Make up pushrod elevator mount landing gears install screweyes fuselage gas tank rubberband retainers suggest remove pos sible hardware re-installed after painting model use nylon hinges epoxy surfaces after parts have painted Everyone has own favorite finishing technique materials prefer sold Su per Coverite wing covering material recommend Wood surfaces prepared several coats clear dope sanding sealer sanding thoroughly between coats camouflage paint job spray gun airbrush almost necessity done brush masked off will look authentic Other de tailing panel lines done drafting pen rivets simulated mb-off dots windows painted etc will add finished model pusher 15 installed no offset front 35 installed two washers under front mounting lug Use well broken-in engines Run up en gine separately adjust needle valves top off tanks rear engine should set fairly lean tends richen air due tank location plane flies well no bad charac teristics December1976 79 COX ENGINES COX/SANWA RIC SYSTEMS AIRTRONICS KITS C Send complete catalog 1525 E Warner Ave Santa Ana CA 92702 HCBBIES A
Edition: Model Aviation - 1976/12
Page Numbers: 28, 29, 30, 31, 79
FOkkCk D-23 control-line twin has no engine-out problems will perform entire stunt pattern 28 Model Aviation Dick Sarpolus FOKKER D-23 Whats what country red white blue orange insignia com ments hear flying model course scale modelers try hard find unusual subjects model aircraft developed built Dutch prior World War II single-seat fighter testing proved good go produc tion Dutch front-line fighter 1942 Nazi invasion Nether lands cancelled plans plane never produced Performance figures impressive time period powered two Sagitta V-12 570-hp engines wing span 34 8 length 32 6 top speed excess 373 mph proposed armament four 79-mm Browning machine guns would have made formidable fighting machine overall configuration looked like would make good flying control-line model model naturally standway-off scale profile fuselage con figuration insure good pattern flying characteristics large wing full flap/ elevator controls generous tail area etc incorporated model configu ration Original intention power use two 19s however balance rea sons went 35 nose 15 pusher As designed model balanced perfectly color scheme used Dutch three-color camouflagedark brown tan dark green could find black white pictures original apparently used camouflage typical Dutch planes time illustrate problems scale modelers located two good 3-view drawings D-23 differed considerably other major areas Comparing threeviews several photos selected drawing appeared like photos Although model profile good paint job sufficient detailing added makes nice appearing ship Advantage profile construc tion course simplicity speed construction Flight performance good model will full stunt patternnot well real pattern model good enough casual flier sound two engines added excitement bonus 15 stops model flies 35 will reasonable maneuvers just front engine running 35 stopped first assume model would barely fly gently land havent happen yet wanting complexity second engine 35 alone free spinning rear prop would good way go am bitious modeler fuselage could built up rather profile Basic sides bulkheads shaped blocks top bottom pas tic canopy work better looking ship Enough scale information sales pitch want distinctive easy twin get good supply wood well pro ceed some construction comments believe best cut out necessary parts before starting build Make own kit first rather cut go wood sizes standard mate rial should available reasonable hobby shop wing standard shaped leading trailing edge stock should purchased save lot carving V2 balsa fuselage edge-glued 3 4 wide stock get necessary width Landing gears always problem Vt wire too hard work wire bender makes easy can al Front engine aid dependable Fox 35 Tank 3-ozmany market just sure use correct type 3-blade prop show Dick flies 10 x 6 two blader used DuBro muffler front en gine chosen smallness lightness Opposite page two-color camouflage al makes forget its profile fast heavily armed fighter D-23 set production time Nazi invasion An OS 15 pusher engine maintains flight its own Note fuel feed Ignore wire locked RC throttle Dicks engine Grish has molded nylon Tornado pusher props used 8 x 6what found shop Didnt have rear muffler pix taken December1976 29 NO OCR TEXT Fokker 0-23 ways clamp vise go work hammer Well discuss wing first because dont like build wings So first get out way notched fulldepth spar notched ribs about easiest way get good strong wing No planking cap strips model Notching leading trailing edges work could omitted believe increase strength worth Block up ribs carefully building wing good flat work surface sure no warps get built Epoxy landing gear blocks plywood dou blers bellcrank mount pieces take lot stress center-section planking mod els due twin-boom layout flaps necessary good stunt performance troublesome must made four sections sure sections lined up other move freely binding Tail surfaces require much com ment simply cut 3/16 balsa sheet sanded shape gen eral comment sand better model will look Try airfoiled section stab rudders round off boomsand really round off profile fuselage Dont leave square edges tail booms made three pieces a conserve wood make plane easier assemble Use firm wood booms rather small sections fuselage easy thats building profile Space /8 X wood motor mounts suit engines better appearance install blind nuts engine mounting bolts before add 1/16 plywood fuse lage doublers use epoxy motor mounts plywood doublers because engine vibration December 1976 31 covering wont hide doubtful Construction model Note nicely can fill feather joints between doublers balsa Model can maneuvers front engine alone two really moves out Live action quick reaction continued page 79 engines over place Dont forget rear prop tuning front engine Note Dutch markings wing rudders CL Combat/Johnson continued page 23 idea Slow Combat slow event down speed-wise make slow event dull Current planes inboard tanks super-short nose mo ments full-race engines far outclass Sunday fliers plane Some other proposals eliminate rules either unnecessary enforce able may build same old thing regardless rules remember opponent may take advantage ev ery loophole give treatment AT OUR ANNUAL contest tried new method airplane/line processing new us anyway set up pit area big enough planes first round plane next opposing flying order according draw tightly stretched string marked point center models two strings marked plus-or-minus 6-in area Length thickness pull tests easily accomplished passing out streamers tremendously speeds up show also makes safe place park model lines out helping friends though contest ants knew thorough processing fac ing two tried get away long lines two undersize 015s Fast Combat joker tried tell us HP 40 really 36 because put short rod Event Director asked him what size thought hed have put rod out Chevy pickup Processing can real pain efficient organization can accom plish its goals keeping everyone safe honest no-kill rule tried Slow Com bat result being better overall matches new problem arising contestant cuts string gets credit cut unable get points other through air time used mean playing dodge em remainder match As FAI Combat found guys taking couple quick cuts staying down rest match ha ha wont start engine variation trick fly inverted about foot off ground purely defensive move makes very interesting inverted team race impossible trailing plane catch other unless about 20 mph faster since leading pilot can whip block just like real Team Race Its legal about prayer guy has sporting Maybe CAC should have proposed giving points number laps completed lieve dark past rules limiting number level laps could fly must solution prob lem possibly new streamers WAM gives points close passes. y Actually think maneuver has its equivalency real air-to-air com bat Its called cowards way out THE BIG NEWS combat engines Fox 15 35 Very little known about 15 writing except comes various styles depending whether plain ball bearings em ployed Stubblefield used ball-bearing rear exhaust version win FAI Na tionals spy failed preduce pic ture engine 35 also won Nationals both Fast Slow Combat holding up remarkably well hands hackers could blow up engine having success too normal out-of-thebox use engine best mar ket sample tested did everything asked good starts power plus very easy plugswhich pock etbook will appreciate annoying thing need send off rich side blubbering rich youre running lot nitro quite rich lower nitro fuels problem tremendous amount revs picks up once unloaded air Literature packed box recommends pinching line keep engine cleaned out just before launch doesnt much accurate fuel metering want first up engine decides its time pinch tune shuffle Engines take thrust rear bearing such Fox seem exhibit unload ing Tigres take thrust front bearing An interesting experi ment machinists would set up Fox Tigre-type front end square venturi Combat Special also suspect love round yen turis since shape ultimately im portant mere size claim round venturi would solve some problems Next article Ill have answer because Im making couple venturi sets der plot size shape relation power fuel consumption smallest venturi will let engine reach its horsepower peak will also effi cient Most often larger venturi does nothing except make erratic needle set tings waste fuel Almost current racing engine will flow enough air/fuel mixture its standard venturi quite bit smaller B-Team Race models go over 110 mph 290 venturis would considered small Slow Combat engine majority top runners worry about producing power consistently flash horsepower over some part power curve MACA WILL BE running FAT Com bat Team selection find out FAI will going three-year cycle what year combat will held youre interested world class competi tion now time get started sides Tigre G-15 G-20 new side-port X-15 real strong performer probably equal Rossi Cox combat trim tune Gordon Delaney FAI Challenger consistently pulled streamer over 100 mph through turns just strong Charlie Johnson 3716 Ingraham St. San Diego CA 92109Tel 714-273-6530 Fokker/Sarpolus continued page 31 Overall assembly must done carefully insure true alignment will have straight flying aircraft First major assem bly step fuselage onto wing must perpendicular wing stalled using epoxy fiberglass cloth reinforce fuselage/wing joint leading edge fuselage flaps may added Prior putting booms wing install fins/rudders onto booms triangle stock stab mounts onto rudders Slide booms onto wing pin stab place rudders adjust booms keep stab level wing glue place Make up pushrod elevator mount landing gears install screweyes fuselage gas tank rubberband retainers suggest remove pos sible hardware re-installed after painting model use nylon hinges epoxy surfaces after parts have painted Everyone has own favorite finishing technique materials prefer sold Su per Coverite wing covering material recommend Wood surfaces prepared several coats clear dope sanding sealer sanding thoroughly between coats camouflage paint job spray gun airbrush almost necessity done brush masked off will look authentic Other de tailing panel lines done drafting pen rivets simulated mb-off dots windows painted etc will add finished model pusher 15 installed no offset front 35 installed two washers under front mounting lug Use well broken-in engines Run up en gine separately adjust needle valves top off tanks rear engine should set fairly lean tends richen air due tank location plane flies well no bad charac teristics December1976 79 COX ENGINES COX/SANWA RIC SYSTEMS AIRTRONICS KITS C Send complete catalog 1525 E Warner Ave Santa Ana CA 92702 HCBBIES A
Edition: Model Aviation - 1976/12
Page Numbers: 28, 29, 30, 31, 79
FOkkCk D-23 control-line twin has no engine-out problems will perform entire stunt pattern 28 Model Aviation Dick Sarpolus FOKKER D-23 Whats what country red white blue orange insignia com ments hear flying model course scale modelers try hard find unusual subjects model aircraft developed built Dutch prior World War II single-seat fighter testing proved good go produc tion Dutch front-line fighter 1942 Nazi invasion Nether lands cancelled plans plane never produced Performance figures impressive time period powered two Sagitta V-12 570-hp engines wing span 34 8 length 32 6 top speed excess 373 mph proposed armament four 79-mm Browning machine guns would have made formidable fighting machine overall configuration looked like would make good flying control-line model model naturally standway-off scale profile fuselage con figuration insure good pattern flying characteristics large wing full flap/ elevator controls generous tail area etc incorporated model configu ration Original intention power use two 19s however balance rea sons went 35 nose 15 pusher As designed model balanced perfectly color scheme used Dutch three-color camouflagedark brown tan dark green could find black white pictures original apparently used camouflage typical Dutch planes time illustrate problems scale modelers located two good 3-view drawings D-23 differed considerably other major areas Comparing threeviews several photos selected drawing appeared like photos Although model profile good paint job sufficient detailing added makes nice appearing ship Advantage profile construc tion course simplicity speed construction Flight performance good model will full stunt patternnot well real pattern model good enough casual flier sound two engines added excitement bonus 15 stops model flies 35 will reasonable maneuvers just front engine running 35 stopped first assume model would barely fly gently land havent happen yet wanting complexity second engine 35 alone free spinning rear prop would good way go am bitious modeler fuselage could built up rather profile Basic sides bulkheads shaped blocks top bottom pas tic canopy work better looking ship Enough scale information sales pitch want distinctive easy twin get good supply wood well pro ceed some construction comments believe best cut out necessary parts before starting build Make own kit first rather cut go wood sizes standard mate rial should available reasonable hobby shop wing standard shaped leading trailing edge stock should purchased save lot carving V2 balsa fuselage edge-glued 3 4 wide stock get necessary width Landing gears always problem Vt wire too hard work wire bender makes easy can al Front engine aid dependable Fox 35 Tank 3-ozmany market just sure use correct type 3-blade prop show Dick flies 10 x 6 two blader used DuBro muffler front en gine chosen smallness lightness Opposite page two-color camouflage al makes forget its profile fast heavily armed fighter D-23 set production time Nazi invasion An OS 15 pusher engine maintains flight its own Note fuel feed Ignore wire locked RC throttle Dicks engine Grish has molded nylon Tornado pusher props used 8 x 6what found shop Didnt have rear muffler pix taken December1976 29 NO OCR TEXT Fokker 0-23 ways clamp vise go work hammer Well discuss wing first because dont like build wings So first get out way notched fulldepth spar notched ribs about easiest way get good strong wing No planking cap strips model Notching leading trailing edges work could omitted believe increase strength worth Block up ribs carefully building wing good flat work surface sure no warps get built Epoxy landing gear blocks plywood dou blers bellcrank mount pieces take lot stress center-section planking mod els due twin-boom layout flaps necessary good stunt performance troublesome must made four sections sure sections lined up other move freely binding Tail surfaces require much com ment simply cut 3/16 balsa sheet sanded shape gen eral comment sand better model will look Try airfoiled section stab rudders round off boomsand really round off profile fuselage Dont leave square edges tail booms made three pieces a conserve wood make plane easier assemble Use firm wood booms rather small sections fuselage easy thats building profile Space /8 X wood motor mounts suit engines better appearance install blind nuts engine mounting bolts before add 1/16 plywood fuse lage doublers use epoxy motor mounts plywood doublers because engine vibration December 1976 31 covering wont hide doubtful Construction model Note nicely can fill feather joints between doublers balsa Model can maneuvers front engine alone two really moves out Live action quick reaction continued page 79 engines over place Dont forget rear prop tuning front engine Note Dutch markings wing rudders CL Combat/Johnson continued page 23 idea Slow Combat slow event down speed-wise make slow event dull Current planes inboard tanks super-short nose mo ments full-race engines far outclass Sunday fliers plane Some other proposals eliminate rules either unnecessary enforce able may build same old thing regardless rules remember opponent may take advantage ev ery loophole give treatment AT OUR ANNUAL contest tried new method airplane/line processing new us anyway set up pit area big enough planes first round plane next opposing flying order according draw tightly stretched string marked point center models two strings marked plus-or-minus 6-in area Length thickness pull tests easily accomplished passing out streamers tremendously speeds up show also makes safe place park model lines out helping friends though contest ants knew thorough processing fac ing two tried get away long lines two undersize 015s Fast Combat joker tried tell us HP 40 really 36 because put short rod Event Director asked him what size thought hed have put rod out Chevy pickup Processing can real pain efficient organization can accom plish its goals keeping everyone safe honest no-kill rule tried Slow Com bat result being better overall matches new problem arising contestant cuts string gets credit cut unable get points other through air time used mean playing dodge em remainder match As FAI Combat found guys taking couple quick cuts staying down rest match ha ha wont start engine variation trick fly inverted about foot off ground purely defensive move makes very interesting inverted team race impossible trailing plane catch other unless about 20 mph faster since leading pilot can whip block just like real Team Race Its legal about prayer guy has sporting Maybe CAC should have proposed giving points number laps completed lieve dark past rules limiting number level laps could fly must solution prob lem possibly new streamers WAM gives points close passes. y Actually think maneuver has its equivalency real air-to-air com bat Its called cowards way out THE BIG NEWS combat engines Fox 15 35 Very little known about 15 writing except comes various styles depending whether plain ball bearings em ployed Stubblefield used ball-bearing rear exhaust version win FAI Na tionals spy failed preduce pic ture engine 35 also won Nationals both Fast Slow Combat holding up remarkably well hands hackers could blow up engine having success too normal out-of-thebox use engine best mar ket sample tested did everything asked good starts power plus very easy plugswhich pock etbook will appreciate annoying thing need send off rich side blubbering rich youre running lot nitro quite rich lower nitro fuels problem tremendous amount revs picks up once unloaded air Literature packed box recommends pinching line keep engine cleaned out just before launch doesnt much accurate fuel metering want first up engine decides its time pinch tune shuffle Engines take thrust rear bearing such Fox seem exhibit unload ing Tigres take thrust front bearing An interesting experi ment machinists would set up Fox Tigre-type front end square venturi Combat Special also suspect love round yen turis since shape ultimately im portant mere size claim round venturi would solve some problems Next article Ill have answer because Im making couple venturi sets der plot size shape relation power fuel consumption smallest venturi will let engine reach its horsepower peak will also effi cient Most often larger venturi does nothing except make erratic needle set tings waste fuel Almost current racing engine will flow enough air/fuel mixture its standard venturi quite bit smaller B-Team Race models go over 110 mph 290 venturis would considered small Slow Combat engine majority top runners worry about producing power consistently flash horsepower over some part power curve MACA WILL BE running FAT Com bat Team selection find out FAI will going three-year cycle what year combat will held youre interested world class competi tion now time get started sides Tigre G-15 G-20 new side-port X-15 real strong performer probably equal Rossi Cox combat trim tune Gordon Delaney FAI Challenger consistently pulled streamer over 100 mph through turns just strong Charlie Johnson 3716 Ingraham St. San Diego CA 92109Tel 714-273-6530 Fokker/Sarpolus continued page 31 Overall assembly must done carefully insure true alignment will have straight flying aircraft First major assem bly step fuselage onto wing must perpendicular wing stalled using epoxy fiberglass cloth reinforce fuselage/wing joint leading edge fuselage flaps may added Prior putting booms wing install fins/rudders onto booms triangle stock stab mounts onto rudders Slide booms onto wing pin stab place rudders adjust booms keep stab level wing glue place Make up pushrod elevator mount landing gears install screweyes fuselage gas tank rubberband retainers suggest remove pos sible hardware re-installed after painting model use nylon hinges epoxy surfaces after parts have painted Everyone has own favorite finishing technique materials prefer sold Su per Coverite wing covering material recommend Wood surfaces prepared several coats clear dope sanding sealer sanding thoroughly between coats camouflage paint job spray gun airbrush almost necessity done brush masked off will look authentic Other de tailing panel lines done drafting pen rivets simulated mb-off dots windows painted etc will add finished model pusher 15 installed no offset front 35 installed two washers under front mounting lug Use well broken-in engines Run up en gine separately adjust needle valves top off tanks rear engine should set fairly lean tends richen air due tank location plane flies well no bad charac teristics December1976 79 COX ENGINES COX/SANWA RIC SYSTEMS AIRTRONICS KITS C Send complete catalog 1525 E Warner Ave Santa Ana CA 92702 HCBBIES A
Edition: Model Aviation - 1976/12
Page Numbers: 28, 29, 30, 31, 79
FOkkCk D-23 control-line twin has no engine-out problems will perform entire stunt pattern 28 Model Aviation Dick Sarpolus FOKKER D-23 Whats what country red white blue orange insignia com ments hear flying model course scale modelers try hard find unusual subjects model aircraft developed built Dutch prior World War II single-seat fighter testing proved good go produc tion Dutch front-line fighter 1942 Nazi invasion Nether lands cancelled plans plane never produced Performance figures impressive time period powered two Sagitta V-12 570-hp engines wing span 34 8 length 32 6 top speed excess 373 mph proposed armament four 79-mm Browning machine guns would have made formidable fighting machine overall configuration looked like would make good flying control-line model model naturally standway-off scale profile fuselage con figuration insure good pattern flying characteristics large wing full flap/ elevator controls generous tail area etc incorporated model configu ration Original intention power use two 19s however balance rea sons went 35 nose 15 pusher As designed model balanced perfectly color scheme used Dutch three-color camouflagedark brown tan dark green could find black white pictures original apparently used camouflage typical Dutch planes time illustrate problems scale modelers located two good 3-view drawings D-23 differed considerably other major areas Comparing threeviews several photos selected drawing appeared like photos Although model profile good paint job sufficient detailing added makes nice appearing ship Advantage profile construc tion course simplicity speed construction Flight performance good model will full stunt patternnot well real pattern model good enough casual flier sound two engines added excitement bonus 15 stops model flies 35 will reasonable maneuvers just front engine running 35 stopped first assume model would barely fly gently land havent happen yet wanting complexity second engine 35 alone free spinning rear prop would good way go am bitious modeler fuselage could built up rather profile Basic sides bulkheads shaped blocks top bottom pas tic canopy work better looking ship Enough scale information sales pitch want distinctive easy twin get good supply wood well pro ceed some construction comments believe best cut out necessary parts before starting build Make own kit first rather cut go wood sizes standard mate rial should available reasonable hobby shop wing standard shaped leading trailing edge stock should purchased save lot carving V2 balsa fuselage edge-glued 3 4 wide stock get necessary width Landing gears always problem Vt wire too hard work wire bender makes easy can al Front engine aid dependable Fox 35 Tank 3-ozmany market just sure use correct type 3-blade prop show Dick flies 10 x 6 two blader used DuBro muffler front en gine chosen smallness lightness Opposite page two-color camouflage al makes forget its profile fast heavily armed fighter D-23 set production time Nazi invasion An OS 15 pusher engine maintains flight its own Note fuel feed Ignore wire locked RC throttle Dicks engine Grish has molded nylon Tornado pusher props used 8 x 6what found shop Didnt have rear muffler pix taken December1976 29 NO OCR TEXT Fokker 0-23 ways clamp vise go work hammer Well discuss wing first because dont like build wings So first get out way notched fulldepth spar notched ribs about easiest way get good strong wing No planking cap strips model Notching leading trailing edges work could omitted believe increase strength worth Block up ribs carefully building wing good flat work surface sure no warps get built Epoxy landing gear blocks plywood dou blers bellcrank mount pieces take lot stress center-section planking mod els due twin-boom layout flaps necessary good stunt performance troublesome must made four sections sure sections lined up other move freely binding Tail surfaces require much com ment simply cut 3/16 balsa sheet sanded shape gen eral comment sand better model will look Try airfoiled section stab rudders round off boomsand really round off profile fuselage Dont leave square edges tail booms made three pieces a conserve wood make plane easier assemble Use firm wood booms rather small sections fuselage easy thats building profile Space /8 X wood motor mounts suit engines better appearance install blind nuts engine mounting bolts before add 1/16 plywood fuse lage doublers use epoxy motor mounts plywood doublers because engine vibration December 1976 31 covering wont hide doubtful Construction model Note nicely can fill feather joints between doublers balsa Model can maneuvers front engine alone two really moves out Live action quick reaction continued page 79 engines over place Dont forget rear prop tuning front engine Note Dutch markings wing rudders CL Combat/Johnson continued page 23 idea Slow Combat slow event down speed-wise make slow event dull Current planes inboard tanks super-short nose mo ments full-race engines far outclass Sunday fliers plane Some other proposals eliminate rules either unnecessary enforce able may build same old thing regardless rules remember opponent may take advantage ev ery loophole give treatment AT OUR ANNUAL contest tried new method airplane/line processing new us anyway set up pit area big enough planes first round plane next opposing flying order according draw tightly stretched string marked point center models two strings marked plus-or-minus 6-in area Length thickness pull tests easily accomplished passing out streamers tremendously speeds up show also makes safe place park model lines out helping friends though contest ants knew thorough processing fac ing two tried get away long lines two undersize 015s Fast Combat joker tried tell us HP 40 really 36 because put short rod Event Director asked him what size thought hed have put rod out Chevy pickup Processing can real pain efficient organization can accom plish its goals keeping everyone safe honest no-kill rule tried Slow Com bat result being better overall matches new problem arising contestant cuts string gets credit cut unable get points other through air time used mean playing dodge em remainder match As FAI Combat found guys taking couple quick cuts staying down rest match ha ha wont start engine variation trick fly inverted about foot off ground purely defensive move makes very interesting inverted team race impossible trailing plane catch other unless about 20 mph faster since leading pilot can whip block just like real Team Race Its legal about prayer guy has sporting Maybe CAC should have proposed giving points number laps completed lieve dark past rules limiting number level laps could fly must solution prob lem possibly new streamers WAM gives points close passes. y Actually think maneuver has its equivalency real air-to-air com bat Its called cowards way out THE BIG NEWS combat engines Fox 15 35 Very little known about 15 writing except comes various styles depending whether plain ball bearings em ployed Stubblefield used ball-bearing rear exhaust version win FAI Na tionals spy failed preduce pic ture engine 35 also won Nationals both Fast Slow Combat holding up remarkably well hands hackers could blow up engine having success too normal out-of-thebox use engine best mar ket sample tested did everything asked good starts power plus very easy plugswhich pock etbook will appreciate annoying thing need send off rich side blubbering rich youre running lot nitro quite rich lower nitro fuels problem tremendous amount revs picks up once unloaded air Literature packed box recommends pinching line keep engine cleaned out just before launch doesnt much accurate fuel metering want first up engine decides its time pinch tune shuffle Engines take thrust rear bearing such Fox seem exhibit unload ing Tigres take thrust front bearing An interesting experi ment machinists would set up Fox Tigre-type front end square venturi Combat Special also suspect love round yen turis since shape ultimately im portant mere size claim round venturi would solve some problems Next article Ill have answer because Im making couple venturi sets der plot size shape relation power fuel consumption smallest venturi will let engine reach its horsepower peak will also effi cient Most often larger venturi does nothing except make erratic needle set tings waste fuel Almost current racing engine will flow enough air/fuel mixture its standard venturi quite bit smaller B-Team Race models go over 110 mph 290 venturis would considered small Slow Combat engine majority top runners worry about producing power consistently flash horsepower over some part power curve MACA WILL BE running FAT Com bat Team selection find out FAI will going three-year cycle what year combat will held youre interested world class competi tion now time get started sides Tigre G-15 G-20 new side-port X-15 real strong performer probably equal Rossi Cox combat trim tune Gordon Delaney FAI Challenger consistently pulled streamer over 100 mph through turns just strong Charlie Johnson 3716 Ingraham St. San Diego CA 92109Tel 714-273-6530 Fokker/Sarpolus continued page 31 Overall assembly must done carefully insure true alignment will have straight flying aircraft First major assem bly step fuselage onto wing must perpendicular wing stalled using epoxy fiberglass cloth reinforce fuselage/wing joint leading edge fuselage flaps may added Prior putting booms wing install fins/rudders onto booms triangle stock stab mounts onto rudders Slide booms onto wing pin stab place rudders adjust booms keep stab level wing glue place Make up pushrod elevator mount landing gears install screweyes fuselage gas tank rubberband retainers suggest remove pos sible hardware re-installed after painting model use nylon hinges epoxy surfaces after parts have painted Everyone has own favorite finishing technique materials prefer sold Su per Coverite wing covering material recommend Wood surfaces prepared several coats clear dope sanding sealer sanding thoroughly between coats camouflage paint job spray gun airbrush almost necessity done brush masked off will look authentic Other de tailing panel lines done drafting pen rivets simulated mb-off dots windows painted etc will add finished model pusher 15 installed no offset front 35 installed two washers under front mounting lug Use well broken-in engines Run up en gine separately adjust needle valves top off tanks rear engine should set fairly lean tends richen air due tank location plane flies well no bad charac teristics December1976 79 COX ENGINES COX/SANWA RIC SYSTEMS AIRTRONICS KITS C Send complete catalog 1525 E Warner Ave Santa Ana CA 92702 HCBBIES A