FREE ADVICE Build light better fly ing longer lasting Scale model advice given Doug Dahike Oshkosh WI Doug says An old comment about Scale folks spending much time outside end up nonflyable model still has strong elements truth truth us probably dont give too much thought weight place ment individual parts put Scale models together especially case building kits As Control Liners know invariably have add weight Outer wing tip nose tail balance models Doug says weighing placing parts according weight can reduce amount additional weight required balance purposes Its possi ble save couple ounces weight typ ical Profile Scale kit key Dougs weight reduction process investment good scale Doug uses four-beam Ohaus Centigram scale says scale type can cost $100 seems like large sum money spend weighing model parts its one-time cost lifetime model building Now weight-reduction process Lets use typical Profile Scale kit example Lay out plans table workbench Place parts leading trailing edges wing ribs spars eleva tor surfaces sheeting respec tive places plans Starting wing tips weigh both place heaviest outboard side wing Now weigh set ribs starting tip ribs working toward center wing always placing heaviest rib outboard side wing Lets look leading trailing edges Weigh leading edges select heaviest outboard side Take leading edge se lected outboard side determine end heaviest Block up end leading edge place other scale Note weight Now reverse leading edge again note weight Place heaviest end out board end outhoard wing panel Use same procedure trailing edges whether solid V-sheeted type Weigh piece ends piece always placing heaviest piece end toward outboard end outboard wing panel time should getting idea placing heaviest part end part outboard side thus reducing amount addi tional wing tip weight might needed Use same procedure elevator surfaces wing sheeting fuselage prestamped shaped dont have much control youre making fuselage plank weigh both ends put heavy end toward nose plane should obvious above technique nothing making what have should also obvious model will have strength needs use less wing tip weight process materialweighing process used scratchbuilding full-bodied Scale model care taken select lightest material possible sev eral ounces might saved saved weight could result better flying model need less horsepower could reinvested fine details model Dougs theme think light gives us following consider Did know scratch-building 35-size model selecting materials can save much five six ounces over identical kit Did know 35-size model using lightest wheels spinner prop versus heaviest can result five-ounce difference weight Did know about 50% weight metal fuel tank solder Given equal lengths music wire lighter length %-in music wire two three four lengths /16 wire single length A-in wire heavier four equal lengths /16 wire Normal balsa weighs about eight pounds per cubic foot normal five-ply plywood light types about 48 lb/cu ft comes plastics can range 80-115 lb/cu ft ver sus eight pounds per cubic foot balsa sup pose could go comparing maContinued page 174 Left One two diverse models Charles Bauer Norridge IL scratch-built Profile Scale Focke Wuif TA-i 54 Night Fighter spans 80 uses two Royal 25s equipped three-line system Outer wing panels removable engine naceiles its interesting although ship excellent combat production stopped due lack adequate glue Charles Bauer photo Middle other extreme home-built known Weedhopper its Cox RC kit thats no longer available Weedhopper powered 049 engine said fly very well 35-ft lines Bauer photo Right P-61 Black Widow Night Fighter work Virgil Wilbur placed third Sport Scale event includes three-line system throttle control Photos taken Ted Cronenwett during Knights Round Circle Joust Whittier Narrows flying site El Monte CA Contest featured CL Sport Scale West Coast 112A CL Profile Scale October 1990 63 Conoi Line Scale Bill Boss 77-06 269th Street New Hyde Park NY 11040 Merle Morhing Rialto CA uses small electric starler during preflight runup 049 en gInes Russian version B-29 Super Fortress fine covering job panel lines make great-looking Profile Scale model Merle big four-engine profiles Remember Japanese Kawanishi H6K-4 May15 flying boat June 89 issue Ted Cronenwett photo F4U-1 Corsair Ted Cronenwett Canoga Park CA powered OS-25FP engine employs three-line control system fea tures engine cut-off Placed second Sport Scale event Diamond markings wing rudder used USS Frank lin color scheme markings can found Corsair Planes Fame Mu seum Chino CA Photo Merle Mohring Youll See * Flying off lake smashing ice * What happens whan hand launch forget turn radio plane * A mplane turn tree4ane * A Rocket engine mourst#to E7mdecker * Four wrecked planes turne0 Twin flewi * And just lot Bad much Dont miss ons oti Send check m 420 L phone 717342-1963 VISA-MASTE CL Aerobatics/McMiIIan Continued page 170 Ordinarily oils will work short periods time dry out couple other choices know will work Use Vaseline some Teflon powder mixed touch warm soldering iron will flow Vaseline bearing cools down will stay put its job will remain solid form normal temper atures use effective long can fly plane Ive got planes over 2000 flights credit controls still free bearings tight Use motorcycle chain lube product comes out its aerosol can foam slowly changes state become gellike have work lube bearing once will stay put CL Scale/Boss Continued page 63 terials time Dougs message should coming through loud clear pays think light build light better flying longer lasting models WarbirdsClassic American Fighters & Bomb ers title book WW II fighter bomber lovers might want add library book Michael OLeary Norman Pealing Mike Jerram compila tion work previously published Gunfighter Bombers OLeary American Warbirds Pealing Warbirds Jerram 239-page work contains over 260 extraordinary color illus trations classic American fighters bombers include P-5 1 P-40 F8F Bearcat F6F Hellcat F4F Wildcat F4U Cor sair P-47 P-38 TBM Avenger AD Skyraider B-25 A-26 PV-2 Harpoon B-26 Marauder A20 Havoc B-17 B-24 B-29 photos book excellent qual ity show much fine detail often look building models book recommended library shelf re search purposes am sure will find photos just what need color documentation purposes 1990 edi tion ISBN 0-517-01218-9 published Mili tary Press distributed Crown Publishers Inc 225 Park Ave South NY NY 10003 found copy local Barnes Noble bookstore cost $20-plus New trim sheets Eagle Products has just intro duced line fuclproof applied per structions trim sheets come four differ ent styles three-color sheet solid fluorescent colors vertical horizontal stripe sheets stripes graduated sizes threecolor sheets have colors complement other ie yellow-orange-red Cub yellowred-gray three-color sheet has large 3In center stripe 3A -in stripe either side center stripe %-in stripe alongside 4-in stripes package contains three 6-in-wide x 27in-long sheets trim sheets can cut desired shape design remove liner stick model following few simple instructions No heat other adhesives required trim sheets may have limited use Scale models am sure will great help dressing up sportflying models Prices range about $17 $23 per package depending type trim sheets specific information product its distribution write Eagle Prod ucts PO Box 4609 Covina CA 91723 tel 1818/339-1311 Caption correction July column pic ture Bill Reynolds Grumman Bearcat credited being taken C Peter Cornils credit should have read Chris Peter Cornils Chris wifes name Chris sorry error Please send ideas notice upcoming CL Scale events contest reports especially photos CL Scale activity address very top column Alignment/Jennings Continued page 67 Draw parallel lines 2% apart 1 x 6-in pine Thats width front end design Yours may different lines run full length 1 x 6-in pine plank Redraw theyre parallel rear bulkhead support fixed support front bulkhead adjustable Cut front bulkhead support fourth corner brace Cut out parts front end bulkheads made aircraft plywood Lite Ply engine bearers x -in hard maple re duce effects drill runout drill en gine mounting holes mounting side Make relief cuts fuel tank maintains relationship between nee dle valve fuel tank centerline Load parts jig trimming sanding No gluing done stage bulkheads must flush en gine bearer edges Check four corners flush fit Sand trim discrepan cies must done before gluing Install engine bolt pattern jig align space engine bearers satisfied fit remove parts jig Lay piece plastic wrap over jig Make two cuts cor ner braces bolt post allows plastic wrap lay flat prevents gluing front end assembly jig Reassem ble parts jig glue gether Use 45-minute epoxy glue joints dry remove assembly jig completed product along en gine fuel tank shown pictures Reinforce intersections assembly 1A-in triangular balsa gus sets Gussets should installed top side engine bearers Install after epoxying blind nuts Notch gussets blind nuts relieve engine mounting bolts may pass through gussets will prevent blind nuts working loose model aircraft can course built such jigs its much difficult Continued page 176 174 Model Aviation RIC FOLLIES PRESENTS Craziest Wacklest Funniest MEFAIpiea Wreeirs YouD Ever Seoul Over 30 Minutes CRASH after CRASH after CRASH
Edition: Model Aviation - 1990/10
Page Numbers: 63, 174
Edition: Model Aviation - 1990/10
Page Numbers: 63, 174
FREE ADVICE Build light better fly ing longer lasting Scale model advice given Doug Dahike Oshkosh WI Doug says An old comment about Scale folks spending much time outside end up nonflyable model still has strong elements truth truth us probably dont give too much thought weight place ment individual parts put Scale models together especially case building kits As Control Liners know invariably have add weight Outer wing tip nose tail balance models Doug says weighing placing parts according weight can reduce amount additional weight required balance purposes Its possi ble save couple ounces weight typ ical Profile Scale kit key Dougs weight reduction process investment good scale Doug uses four-beam Ohaus Centigram scale says scale type can cost $100 seems like large sum money spend weighing model parts its one-time cost lifetime model building Now weight-reduction process Lets use typical Profile Scale kit example Lay out plans table workbench Place parts leading trailing edges wing ribs spars eleva tor surfaces sheeting respec tive places plans Starting wing tips weigh both place heaviest outboard side wing Now weigh set ribs starting tip ribs working toward center wing always placing heaviest rib outboard side wing Lets look leading trailing edges Weigh leading edges select heaviest outboard side Take leading edge se lected outboard side determine end heaviest Block up end leading edge place other scale Note weight Now reverse leading edge again note weight Place heaviest end out board end outhoard wing panel Use same procedure trailing edges whether solid V-sheeted type Weigh piece ends piece always placing heaviest piece end toward outboard end outboard wing panel time should getting idea placing heaviest part end part outboard side thus reducing amount addi tional wing tip weight might needed Use same procedure elevator surfaces wing sheeting fuselage prestamped shaped dont have much control youre making fuselage plank weigh both ends put heavy end toward nose plane should obvious above technique nothing making what have should also obvious model will have strength needs use less wing tip weight process materialweighing process used scratchbuilding full-bodied Scale model care taken select lightest material possible sev eral ounces might saved saved weight could result better flying model need less horsepower could reinvested fine details model Dougs theme think light gives us following consider Did know scratch-building 35-size model selecting materials can save much five six ounces over identical kit Did know 35-size model using lightest wheels spinner prop versus heaviest can result five-ounce difference weight Did know about 50% weight metal fuel tank solder Given equal lengths music wire lighter length %-in music wire two three four lengths /16 wire single length A-in wire heavier four equal lengths /16 wire Normal balsa weighs about eight pounds per cubic foot normal five-ply plywood light types about 48 lb/cu ft comes plastics can range 80-115 lb/cu ft ver sus eight pounds per cubic foot balsa sup pose could go comparing maContinued page 174 Left One two diverse models Charles Bauer Norridge IL scratch-built Profile Scale Focke Wuif TA-i 54 Night Fighter spans 80 uses two Royal 25s equipped three-line system Outer wing panels removable engine naceiles its interesting although ship excellent combat production stopped due lack adequate glue Charles Bauer photo Middle other extreme home-built known Weedhopper its Cox RC kit thats no longer available Weedhopper powered 049 engine said fly very well 35-ft lines Bauer photo Right P-61 Black Widow Night Fighter work Virgil Wilbur placed third Sport Scale event includes three-line system throttle control Photos taken Ted Cronenwett during Knights Round Circle Joust Whittier Narrows flying site El Monte CA Contest featured CL Sport Scale West Coast 112A CL Profile Scale October 1990 63 Conoi Line Scale Bill Boss 77-06 269th Street New Hyde Park NY 11040 Merle Morhing Rialto CA uses small electric starler during preflight runup 049 en gInes Russian version B-29 Super Fortress fine covering job panel lines make great-looking Profile Scale model Merle big four-engine profiles Remember Japanese Kawanishi H6K-4 May15 flying boat June 89 issue Ted Cronenwett photo F4U-1 Corsair Ted Cronenwett Canoga Park CA powered OS-25FP engine employs three-line control system fea tures engine cut-off Placed second Sport Scale event Diamond markings wing rudder used USS Frank lin color scheme markings can found Corsair Planes Fame Mu seum Chino CA Photo Merle Mohring Youll See * Flying off lake smashing ice * What happens whan hand launch forget turn radio plane * A mplane turn tree4ane * A Rocket engine mourst#to E7mdecker * Four wrecked planes turne0 Twin flewi * And just lot Bad much Dont miss ons oti Send check m 420 L phone 717342-1963 VISA-MASTE CL Aerobatics/McMiIIan Continued page 170 Ordinarily oils will work short periods time dry out couple other choices know will work Use Vaseline some Teflon powder mixed touch warm soldering iron will flow Vaseline bearing cools down will stay put its job will remain solid form normal temper atures use effective long can fly plane Ive got planes over 2000 flights credit controls still free bearings tight Use motorcycle chain lube product comes out its aerosol can foam slowly changes state become gellike have work lube bearing once will stay put CL Scale/Boss Continued page 63 terials time Dougs message should coming through loud clear pays think light build light better flying longer lasting models WarbirdsClassic American Fighters & Bomb ers title book WW II fighter bomber lovers might want add library book Michael OLeary Norman Pealing Mike Jerram compila tion work previously published Gunfighter Bombers OLeary American Warbirds Pealing Warbirds Jerram 239-page work contains over 260 extraordinary color illus trations classic American fighters bombers include P-5 1 P-40 F8F Bearcat F6F Hellcat F4F Wildcat F4U Cor sair P-47 P-38 TBM Avenger AD Skyraider B-25 A-26 PV-2 Harpoon B-26 Marauder A20 Havoc B-17 B-24 B-29 photos book excellent qual ity show much fine detail often look building models book recommended library shelf re search purposes am sure will find photos just what need color documentation purposes 1990 edi tion ISBN 0-517-01218-9 published Mili tary Press distributed Crown Publishers Inc 225 Park Ave South NY NY 10003 found copy local Barnes Noble bookstore cost $20-plus New trim sheets Eagle Products has just intro duced line fuclproof applied per structions trim sheets come four differ ent styles three-color sheet solid fluorescent colors vertical horizontal stripe sheets stripes graduated sizes threecolor sheets have colors complement other ie yellow-orange-red Cub yellowred-gray three-color sheet has large 3In center stripe 3A -in stripe either side center stripe %-in stripe alongside 4-in stripes package contains three 6-in-wide x 27in-long sheets trim sheets can cut desired shape design remove liner stick model following few simple instructions No heat other adhesives required trim sheets may have limited use Scale models am sure will great help dressing up sportflying models Prices range about $17 $23 per package depending type trim sheets specific information product its distribution write Eagle Prod ucts PO Box 4609 Covina CA 91723 tel 1818/339-1311 Caption correction July column pic ture Bill Reynolds Grumman Bearcat credited being taken C Peter Cornils credit should have read Chris Peter Cornils Chris wifes name Chris sorry error Please send ideas notice upcoming CL Scale events contest reports especially photos CL Scale activity address very top column Alignment/Jennings Continued page 67 Draw parallel lines 2% apart 1 x 6-in pine Thats width front end design Yours may different lines run full length 1 x 6-in pine plank Redraw theyre parallel rear bulkhead support fixed support front bulkhead adjustable Cut front bulkhead support fourth corner brace Cut out parts front end bulkheads made aircraft plywood Lite Ply engine bearers x -in hard maple re duce effects drill runout drill en gine mounting holes mounting side Make relief cuts fuel tank maintains relationship between nee dle valve fuel tank centerline Load parts jig trimming sanding No gluing done stage bulkheads must flush en gine bearer edges Check four corners flush fit Sand trim discrepan cies must done before gluing Install engine bolt pattern jig align space engine bearers satisfied fit remove parts jig Lay piece plastic wrap over jig Make two cuts cor ner braces bolt post allows plastic wrap lay flat prevents gluing front end assembly jig Reassem ble parts jig glue gether Use 45-minute epoxy glue joints dry remove assembly jig completed product along en gine fuel tank shown pictures Reinforce intersections assembly 1A-in triangular balsa gus sets Gussets should installed top side engine bearers Install after epoxying blind nuts Notch gussets blind nuts relieve engine mounting bolts may pass through gussets will prevent blind nuts working loose model aircraft can course built such jigs its much difficult Continued page 176 174 Model Aviation RIC FOLLIES PRESENTS Craziest Wacklest Funniest MEFAIpiea Wreeirs YouD Ever Seoul Over 30 Minutes CRASH after CRASH after CRASH
