Free Flight Old-Timers Clarence Haught L ERIES THIS ELECTRICAL orTHE METAL PARTS rCAPACITOR1POINTS OPERATING ignition engine new comers Old-Timer activity have consider able experience operating glow engines have never operated ignition engine Running can half fun some new things learn some challenges met aware course presence ignition points spark plug fact coil condenser batteries needed few fine points dealt New coils condensers spark plugs etc available retailers can use original newcomers Old-Timer activity have never run engine Ignition wiring diagram typical classic non-transistorized ignition system components can find Original con densers may hard find new ones Radio Shack work well Ask 1 mfd 400volt capacitor will have hookup wires single-strand construction will stand vibration engine theyre fully supported easiest solution simply solder some multi-strand hookup wire onto capacitor leads glue capacitor solid wire model structure epoxy Hook up other ignition compo nents multi-strand wire soldering con nections indicated accompanying wiring diagram major improvements operating ignition engines area batteries old days often cranked hours get Continued page 168 Willie RltzhelmerL Elf Single-powered Strata Streak crashed Harts Lake butthe engine undamaged Repaired model flying again takes lots nerve fly engine rare Jerry Peeples Red Ripper design R appeared July1940 issue Flying Aces Bob Schafer built Note flag DT timer help remind flier turn Photos Bob Schafer Karl Hatrak lofts recently discovered OT design Mickey DeAnells Miss Fortune X X experimental predecessor Trenton Terror Original plans drawn wallpaper redrawn Karl Power isa Hornet 19 Jumbo Rubber Tayiorcraft 0-57 Grasshopper R Loren Williams latest joy Wing has 384 sq area plane weighs 9 oz Photos Mik Mikkelson October 1987 71 other Glue place bend up /16-rn music wire elevator joiner Use CyA tack place carefully sew elevators shown plans Check fuselages make sure still parallel finish gluing wire joiner place setting cut out plywood landing gear doors give few coats dope seal off Bend main landing gear wires shape sew gear doors wire shown Now add lower scoops nose gear doors main landing gears lower rudders fuselages Finishing chose paint model common Luftwaffe splinter pattern light blue undersides dark green/black green upper surfaces canopies painted black outlined silver pin-stripping tape crosses cut black white MonoKote trim sheets stuck place Install engines wheels rear props Add drop CyA glue rear prop screws keep coming off flight should little trouble balancing Ju-6 35 check just same Add needed weight Twins lot fun fly much fun sit monkey field Test run engines before go out fly should start run well individually together Try tuning same pitch timing runs longer running two engines should put inboard fuselage Once satisfied performance get some 30-ft steel lines head field Warm up engines set needle valves harmony Shut engines down refuel hook up lines Ju 635 rolls out rather awkwardly its four wheels picks up speed quickly will break ground touch elevator air very stable maneuverable engine settles down slow steady flight pattern yet still responsive Have fun reliving past never got happen FF Old-Timers/Haught Continued page 71 engine started booster batteriesonly have quit switched over flight batteries Today larger models use alkaline C D batteries flight pack start engine booster batteries bench-running still prefer use boosters made hooking two *6 dry cells series provide required three volts use boosters small models equipped AA flight batteries Incidentally polarity ignition system optional care must used using booster batteries reversing polarity will ruin flight pack Ignition engines run slower glow counterparts generally require propeller has larger diameter lower pitch As rule thumb usually use nine-inch-diameter prop small engines up 19 cu displace ment 10-in small Class B up 25 cu li-in 29s 14-in 60s Pitch neighborhood four six inches like use largest propeller will still allow engine attaln its original rated rpm Fuel ignition engine must mixed Although ignition engines will run fine glow fuel SAM competition rules require gas-andoil mixture originally recommended formula three four parts white gasoline part SAE 70 motor oil Motorcycle oil used call RMcM White gasoline no longer available local service station unleaded auto gas welcome substitute oil now problem SAE 70 oil used available motorcycle shops scarce now use Aviation SAE 60 uncompounded oil local airport mix three-to-one unleaded gasoline seems work fine Some suppliers offer mixed fuel oil other lubrication additives have no current information whats available Perhaps some out can help out Before attempting start ignition engine other caution worth mentioning old engines designed used electric starters Electric starters place reverse thrust load crankshaft may push back crankcase far enough rotating crankpin chew up rear engine casting best using electric starter places undue strain crankshaft bushings meet rear prop drive washer Newly converted glow engines may handle starters just fine unless original replica engine has ball thrust bearing will better off hand-cranking engine obtain maximum power ignition must occur near top dead center pistons strokeand preferably just before piston reaches top dead center allow fuel/air mixture begin burning before piston starts down thereby assuring maximum energy will utilized Trying start engine spark timed occur top dead center can result backfiring kicking engine turn can whack good finger avoid situation engine cranked spark-timing retarded Simply move adjust able timer-arm direction propeller rotation few degrees ignition will occur Continued page 170 168 Model Aviation RC SOARING DIGEST monthly publication covering International RC Soaring Scene SI 6/yearin USA US $20/yr Canada& Mexico US $24/yr elsewhere via airmail RCSD PO Box 269 Peterborough NH 03458 hate install hinges Try Easy Hinges See Difference single slot few drops CIA glue Its done No gouging pinning hinge pins worry about Incredibly strong Virtually indestructible 24 hinges 0295 P0 Box 1743 Marcos CA 92069 WETPOXY SAFE OXY unique two-component epoxy laminating system developed offer user safest highest quality laminating resin available VA Pt Kit- $1400 VA Ot Kit- $2100 Glass Cloth 58 oz/sq yd 38x6ft-$90038xl5ft-$1900 38x30ft-$3500 add $250 Ship & Hand above inems Send SASE additional information AcPs Ughtweight comsite Materials Order COD Send check Money Order AEROSPACE COMPOSITE PRODUCTS P0 Boa 16621 IDept Al Irvine CA 92714 Source tor Lightweight Materials JU-635/Nelson Continued page 162 Fokker D-VII VK Model Aircraft PO Box 3007 Aurora 1160505 312-357-1883 after piston has started downward engine connect 1 -volt battery Incidentally ignition occurs points proceed start engine engine will opennot close After engine run giow plug long battery running spark timing advanced moving connected will allow get fuel timer arm against direction propeller regulated hassle ignition sys rotation until maximum rpm obtained tem technique good way isolate fuel problems ignition problems Run ignition engine times until thoroughiy acquainted its operation before install airplane head flying field start engine open needle valve three four turns choke engine turning propeller holding finger over air intake will draw fuel engine Retard spark energize ignition system Crank engine normal manner until starts Adjust needle valve spark advance alternately until engine running properly engine fails start remove spark plug lead high-tension lead spark plug hold its end near engine neighborhood urning prop watching high-voltage spark will quickly learn good idea touch bare end high-tension lead part engine part body cranking engine no spark try advancing ignition timer bit since may have retarded much sparking cannot occur Also check see points clean dry proper clearanceabout 012 RMcM Oil points will create insulating film prevent sparking Other causes no spark poor electrical connections bad batteries broken hookup wires have spark engine doesnt fire check fouled spark plug Remove plug hook high-tension lead its normal spot plug hold metal base plug against engine rotating prop ignition system course should see good hot spark jump between spark plug electrodes plug fouled oil wont work Also just automobile spark plugs possible plug have internal failure will prevent firing Its always good idea carry spare spark plug flying field ignition system checks out experiment needle valve setting prime engine few drops fuel exhaust port else fails screw giow plug Catalogs Ijust received neat catalog OldTimer Model Supply PO Box 7334 Van Nuys CA 91409 OTMS operated Ken Sykora longtime enthusiast Old-Timer modeling have read articles SCIF newsletter Flightplug signs King Sugar Ken offers hard-to-locate items mainly rubber-power field including extensive inventory rubber-model plans Stahi Struhl Lindberg Comet Megow Scien tific etc New tools also received sample new sanding block called appropriately GrateShapes come grit bonded surfaces sold shapes including flats grooves making V-shaped edges radiuses suitable leading edges other curved model parts round bars really work well manufacturer Bell Rock Indus tries 6486 Hwy 179Suite 108 Sedona AZ 86336 See ad magazine Clarence Haught 3226 Honeysuckle Dr Coeur dAlene ID 83814 FF Duration/Murphy Continued page 73 fire As added precaution have small fire extinguisher keep handy never know light structures may take few seconds steam steam very hot get fingers too close vapor either have pair old insulated winter work gloves use procedure work fine Heavy structures like large wing Gas model take longer soak steam before becoming pliable enough reshape What steam does induce moisture wood struc ture balsawood gets very soft pliable moisture added move model component out steam retain overbend hold short time until area cools somewhat results either too drastic still satisfactory repeat process until have warp-free panel specific warp situation desire can repeat process times slightest dam age model may wish check model few days see warp results holding place simple process very few models escape least teakettle session before finding way test field hope helps offspring say get steamed quite often What mean 1988 SAM Champs 1987 SAM Society Antique Modelers Championships ongoing Seguin TX writing Meanwhile plans proceeding 1988 Midwest-sponsored ver sion held Mid America Airport near Lawrenceville IL Bob Larsh SAM Midwest VP has advised arrangements have firmed up Vincennes University officials dormi tories bean feed banquet Vincennes just few miles back across Red Skelton Bridge spans mighty Wabash River separates Indiana Illinois area dates yet confirmed will prob ably mid-July enable local farmers bring potato crop before big-footed Free Flighters show up Bob says official flying will span four days all-day MECA Model Engine Collectors Association Collectogether ing scheduled day preceding took two-day Old-Timer Free Right Contest last June sponsored host clubs Tri-County Aero Club TCAC SAM 57 SAM chapter based Marion IL guys gals certainly looking ward big event 88 Sounds like great fun will giving exact dates other pertinent details next column Keep listen ing Meanwhile see ya downwind Harry Murphy 3824 Oakwood Blvd Ander son IN 46011 FF Scale/Warner Continued page 75 Box 13 Braintree MA 02184 Delays answer ing correspondence filing orders have due some bad luck Joe has neverto knowledgecashed customers check until merchandise its way Having trouble getting silk tight models days Ill admit have real bear time last two planes cover wet silk have beautifully tight wrinide free plane start apply dope yet have piece wrinkled sagging garbage finish desperation finally set aside namebrand nitrate dope Sig Lite-Cote used some nut-brown GI surplus nitrate Bobby Chambers gave years ago Despite its age having turned color tightened up sadlooking covering beautifully warned nitrate dope nitrate dope anyone knows good reliable tautening opposite nontautening popular jargon nitrate dope let us old supplies running low Continued page 172 170 Model Aviation
Edition: Model Aviation - 1987/10
Page Numbers: 71, 168, 170
Edition: Model Aviation - 1987/10
Page Numbers: 71, 168, 170
Free Flight Old-Timers Clarence Haught L ERIES THIS ELECTRICAL orTHE METAL PARTS rCAPACITOR1POINTS OPERATING ignition engine new comers Old-Timer activity have consider able experience operating glow engines have never operated ignition engine Running can half fun some new things learn some challenges met aware course presence ignition points spark plug fact coil condenser batteries needed few fine points dealt New coils condensers spark plugs etc available retailers can use original newcomers Old-Timer activity have never run engine Ignition wiring diagram typical classic non-transistorized ignition system components can find Original con densers may hard find new ones Radio Shack work well Ask 1 mfd 400volt capacitor will have hookup wires single-strand construction will stand vibration engine theyre fully supported easiest solution simply solder some multi-strand hookup wire onto capacitor leads glue capacitor solid wire model structure epoxy Hook up other ignition compo nents multi-strand wire soldering con nections indicated accompanying wiring diagram major improvements operating ignition engines area batteries old days often cranked hours get Continued page 168 Willie RltzhelmerL Elf Single-powered Strata Streak crashed Harts Lake butthe engine undamaged Repaired model flying again takes lots nerve fly engine rare Jerry Peeples Red Ripper design R appeared July1940 issue Flying Aces Bob Schafer built Note flag DT timer help remind flier turn Photos Bob Schafer Karl Hatrak lofts recently discovered OT design Mickey DeAnells Miss Fortune X X experimental predecessor Trenton Terror Original plans drawn wallpaper redrawn Karl Power isa Hornet 19 Jumbo Rubber Tayiorcraft 0-57 Grasshopper R Loren Williams latest joy Wing has 384 sq area plane weighs 9 oz Photos Mik Mikkelson October 1987 71 other Glue place bend up /16-rn music wire elevator joiner Use CyA tack place carefully sew elevators shown plans Check fuselages make sure still parallel finish gluing wire joiner place setting cut out plywood landing gear doors give few coats dope seal off Bend main landing gear wires shape sew gear doors wire shown Now add lower scoops nose gear doors main landing gears lower rudders fuselages Finishing chose paint model common Luftwaffe splinter pattern light blue undersides dark green/black green upper surfaces canopies painted black outlined silver pin-stripping tape crosses cut black white MonoKote trim sheets stuck place Install engines wheels rear props Add drop CyA glue rear prop screws keep coming off flight should little trouble balancing Ju-6 35 check just same Add needed weight Twins lot fun fly much fun sit monkey field Test run engines before go out fly should start run well individually together Try tuning same pitch timing runs longer running two engines should put inboard fuselage Once satisfied performance get some 30-ft steel lines head field Warm up engines set needle valves harmony Shut engines down refuel hook up lines Ju 635 rolls out rather awkwardly its four wheels picks up speed quickly will break ground touch elevator air very stable maneuverable engine settles down slow steady flight pattern yet still responsive Have fun reliving past never got happen FF Old-Timers/Haught Continued page 71 engine started booster batteriesonly have quit switched over flight batteries Today larger models use alkaline C D batteries flight pack start engine booster batteries bench-running still prefer use boosters made hooking two *6 dry cells series provide required three volts use boosters small models equipped AA flight batteries Incidentally polarity ignition system optional care must used using booster batteries reversing polarity will ruin flight pack Ignition engines run slower glow counterparts generally require propeller has larger diameter lower pitch As rule thumb usually use nine-inch-diameter prop small engines up 19 cu displace ment 10-in small Class B up 25 cu li-in 29s 14-in 60s Pitch neighborhood four six inches like use largest propeller will still allow engine attaln its original rated rpm Fuel ignition engine must mixed Although ignition engines will run fine glow fuel SAM competition rules require gas-andoil mixture originally recommended formula three four parts white gasoline part SAE 70 motor oil Motorcycle oil used call RMcM White gasoline no longer available local service station unleaded auto gas welcome substitute oil now problem SAE 70 oil used available motorcycle shops scarce now use Aviation SAE 60 uncompounded oil local airport mix three-to-one unleaded gasoline seems work fine Some suppliers offer mixed fuel oil other lubrication additives have no current information whats available Perhaps some out can help out Before attempting start ignition engine other caution worth mentioning old engines designed used electric starters Electric starters place reverse thrust load crankshaft may push back crankcase far enough rotating crankpin chew up rear engine casting best using electric starter places undue strain crankshaft bushings meet rear prop drive washer Newly converted glow engines may handle starters just fine unless original replica engine has ball thrust bearing will better off hand-cranking engine obtain maximum power ignition must occur near top dead center pistons strokeand preferably just before piston reaches top dead center allow fuel/air mixture begin burning before piston starts down thereby assuring maximum energy will utilized Trying start engine spark timed occur top dead center can result backfiring kicking engine turn can whack good finger avoid situation engine cranked spark-timing retarded Simply move adjust able timer-arm direction propeller rotation few degrees ignition will occur Continued page 170 168 Model Aviation RC SOARING DIGEST monthly publication covering International RC Soaring Scene SI 6/yearin USA US $20/yr Canada& Mexico US $24/yr elsewhere via airmail RCSD PO Box 269 Peterborough NH 03458 hate install hinges Try Easy Hinges See Difference single slot few drops CIA glue Its done No gouging pinning hinge pins worry about Incredibly strong Virtually indestructible 24 hinges 0295 P0 Box 1743 Marcos CA 92069 WETPOXY SAFE OXY unique two-component epoxy laminating system developed offer user safest highest quality laminating resin available VA Pt Kit- $1400 VA Ot Kit- $2100 Glass Cloth 58 oz/sq yd 38x6ft-$90038xl5ft-$1900 38x30ft-$3500 add $250 Ship & Hand above inems Send SASE additional information AcPs Ughtweight comsite Materials Order COD Send check Money Order AEROSPACE COMPOSITE PRODUCTS P0 Boa 16621 IDept Al Irvine CA 92714 Source tor Lightweight Materials JU-635/Nelson Continued page 162 Fokker D-VII VK Model Aircraft PO Box 3007 Aurora 1160505 312-357-1883 after piston has started downward engine connect 1 -volt battery Incidentally ignition occurs points proceed start engine engine will opennot close After engine run giow plug long battery running spark timing advanced moving connected will allow get fuel timer arm against direction propeller regulated hassle ignition sys rotation until maximum rpm obtained tem technique good way isolate fuel problems ignition problems Run ignition engine times until thoroughiy acquainted its operation before install airplane head flying field start engine open needle valve three four turns choke engine turning propeller holding finger over air intake will draw fuel engine Retard spark energize ignition system Crank engine normal manner until starts Adjust needle valve spark advance alternately until engine running properly engine fails start remove spark plug lead high-tension lead spark plug hold its end near engine neighborhood urning prop watching high-voltage spark will quickly learn good idea touch bare end high-tension lead part engine part body cranking engine no spark try advancing ignition timer bit since may have retarded much sparking cannot occur Also check see points clean dry proper clearanceabout 012 RMcM Oil points will create insulating film prevent sparking Other causes no spark poor electrical connections bad batteries broken hookup wires have spark engine doesnt fire check fouled spark plug Remove plug hook high-tension lead its normal spot plug hold metal base plug against engine rotating prop ignition system course should see good hot spark jump between spark plug electrodes plug fouled oil wont work Also just automobile spark plugs possible plug have internal failure will prevent firing Its always good idea carry spare spark plug flying field ignition system checks out experiment needle valve setting prime engine few drops fuel exhaust port else fails screw giow plug Catalogs Ijust received neat catalog OldTimer Model Supply PO Box 7334 Van Nuys CA 91409 OTMS operated Ken Sykora longtime enthusiast Old-Timer modeling have read articles SCIF newsletter Flightplug signs King Sugar Ken offers hard-to-locate items mainly rubber-power field including extensive inventory rubber-model plans Stahi Struhl Lindberg Comet Megow Scien tific etc New tools also received sample new sanding block called appropriately GrateShapes come grit bonded surfaces sold shapes including flats grooves making V-shaped edges radiuses suitable leading edges other curved model parts round bars really work well manufacturer Bell Rock Indus tries 6486 Hwy 179Suite 108 Sedona AZ 86336 See ad magazine Clarence Haught 3226 Honeysuckle Dr Coeur dAlene ID 83814 FF Duration/Murphy Continued page 73 fire As added precaution have small fire extinguisher keep handy never know light structures may take few seconds steam steam very hot get fingers too close vapor either have pair old insulated winter work gloves use procedure work fine Heavy structures like large wing Gas model take longer soak steam before becoming pliable enough reshape What steam does induce moisture wood struc ture balsawood gets very soft pliable moisture added move model component out steam retain overbend hold short time until area cools somewhat results either too drastic still satisfactory repeat process until have warp-free panel specific warp situation desire can repeat process times slightest dam age model may wish check model few days see warp results holding place simple process very few models escape least teakettle session before finding way test field hope helps offspring say get steamed quite often What mean 1988 SAM Champs 1987 SAM Society Antique Modelers Championships ongoing Seguin TX writing Meanwhile plans proceeding 1988 Midwest-sponsored ver sion held Mid America Airport near Lawrenceville IL Bob Larsh SAM Midwest VP has advised arrangements have firmed up Vincennes University officials dormi tories bean feed banquet Vincennes just few miles back across Red Skelton Bridge spans mighty Wabash River separates Indiana Illinois area dates yet confirmed will prob ably mid-July enable local farmers bring potato crop before big-footed Free Flighters show up Bob says official flying will span four days all-day MECA Model Engine Collectors Association Collectogether ing scheduled day preceding took two-day Old-Timer Free Right Contest last June sponsored host clubs Tri-County Aero Club TCAC SAM 57 SAM chapter based Marion IL guys gals certainly looking ward big event 88 Sounds like great fun will giving exact dates other pertinent details next column Keep listen ing Meanwhile see ya downwind Harry Murphy 3824 Oakwood Blvd Ander son IN 46011 FF Scale/Warner Continued page 75 Box 13 Braintree MA 02184 Delays answer ing correspondence filing orders have due some bad luck Joe has neverto knowledgecashed customers check until merchandise its way Having trouble getting silk tight models days Ill admit have real bear time last two planes cover wet silk have beautifully tight wrinide free plane start apply dope yet have piece wrinkled sagging garbage finish desperation finally set aside namebrand nitrate dope Sig Lite-Cote used some nut-brown GI surplus nitrate Bobby Chambers gave years ago Despite its age having turned color tightened up sadlooking covering beautifully warned nitrate dope nitrate dope anyone knows good reliable tautening opposite nontautening popular jargon nitrate dope let us old supplies running low Continued page 172 170 Model Aviation
Edition: Model Aviation - 1987/10
Page Numbers: 71, 168, 170
Free Flight Old-Timers Clarence Haught L ERIES THIS ELECTRICAL orTHE METAL PARTS rCAPACITOR1POINTS OPERATING ignition engine new comers Old-Timer activity have consider able experience operating glow engines have never operated ignition engine Running can half fun some new things learn some challenges met aware course presence ignition points spark plug fact coil condenser batteries needed few fine points dealt New coils condensers spark plugs etc available retailers can use original newcomers Old-Timer activity have never run engine Ignition wiring diagram typical classic non-transistorized ignition system components can find Original con densers may hard find new ones Radio Shack work well Ask 1 mfd 400volt capacitor will have hookup wires single-strand construction will stand vibration engine theyre fully supported easiest solution simply solder some multi-strand hookup wire onto capacitor leads glue capacitor solid wire model structure epoxy Hook up other ignition compo nents multi-strand wire soldering con nections indicated accompanying wiring diagram major improvements operating ignition engines area batteries old days often cranked hours get Continued page 168 Willie RltzhelmerL Elf Single-powered Strata Streak crashed Harts Lake butthe engine undamaged Repaired model flying again takes lots nerve fly engine rare Jerry Peeples Red Ripper design R appeared July1940 issue Flying Aces Bob Schafer built Note flag DT timer help remind flier turn Photos Bob Schafer Karl Hatrak lofts recently discovered OT design Mickey DeAnells Miss Fortune X X experimental predecessor Trenton Terror Original plans drawn wallpaper redrawn Karl Power isa Hornet 19 Jumbo Rubber Tayiorcraft 0-57 Grasshopper R Loren Williams latest joy Wing has 384 sq area plane weighs 9 oz Photos Mik Mikkelson October 1987 71 other Glue place bend up /16-rn music wire elevator joiner Use CyA tack place carefully sew elevators shown plans Check fuselages make sure still parallel finish gluing wire joiner place setting cut out plywood landing gear doors give few coats dope seal off Bend main landing gear wires shape sew gear doors wire shown Now add lower scoops nose gear doors main landing gears lower rudders fuselages Finishing chose paint model common Luftwaffe splinter pattern light blue undersides dark green/black green upper surfaces canopies painted black outlined silver pin-stripping tape crosses cut black white MonoKote trim sheets stuck place Install engines wheels rear props Add drop CyA glue rear prop screws keep coming off flight should little trouble balancing Ju-6 35 check just same Add needed weight Twins lot fun fly much fun sit monkey field Test run engines before go out fly should start run well individually together Try tuning same pitch timing runs longer running two engines should put inboard fuselage Once satisfied performance get some 30-ft steel lines head field Warm up engines set needle valves harmony Shut engines down refuel hook up lines Ju 635 rolls out rather awkwardly its four wheels picks up speed quickly will break ground touch elevator air very stable maneuverable engine settles down slow steady flight pattern yet still responsive Have fun reliving past never got happen FF Old-Timers/Haught Continued page 71 engine started booster batteriesonly have quit switched over flight batteries Today larger models use alkaline C D batteries flight pack start engine booster batteries bench-running still prefer use boosters made hooking two *6 dry cells series provide required three volts use boosters small models equipped AA flight batteries Incidentally polarity ignition system optional care must used using booster batteries reversing polarity will ruin flight pack Ignition engines run slower glow counterparts generally require propeller has larger diameter lower pitch As rule thumb usually use nine-inch-diameter prop small engines up 19 cu displace ment 10-in small Class B up 25 cu li-in 29s 14-in 60s Pitch neighborhood four six inches like use largest propeller will still allow engine attaln its original rated rpm Fuel ignition engine must mixed Although ignition engines will run fine glow fuel SAM competition rules require gas-andoil mixture originally recommended formula three four parts white gasoline part SAE 70 motor oil Motorcycle oil used call RMcM White gasoline no longer available local service station unleaded auto gas welcome substitute oil now problem SAE 70 oil used available motorcycle shops scarce now use Aviation SAE 60 uncompounded oil local airport mix three-to-one unleaded gasoline seems work fine Some suppliers offer mixed fuel oil other lubrication additives have no current information whats available Perhaps some out can help out Before attempting start ignition engine other caution worth mentioning old engines designed used electric starters Electric starters place reverse thrust load crankshaft may push back crankcase far enough rotating crankpin chew up rear engine casting best using electric starter places undue strain crankshaft bushings meet rear prop drive washer Newly converted glow engines may handle starters just fine unless original replica engine has ball thrust bearing will better off hand-cranking engine obtain maximum power ignition must occur near top dead center pistons strokeand preferably just before piston reaches top dead center allow fuel/air mixture begin burning before piston starts down thereby assuring maximum energy will utilized Trying start engine spark timed occur top dead center can result backfiring kicking engine turn can whack good finger avoid situation engine cranked spark-timing retarded Simply move adjust able timer-arm direction propeller rotation few degrees ignition will occur Continued page 170 168 Model Aviation RC SOARING DIGEST monthly publication covering International RC Soaring Scene SI 6/yearin USA US $20/yr Canada& Mexico US $24/yr elsewhere via airmail RCSD PO Box 269 Peterborough NH 03458 hate install hinges Try Easy Hinges See Difference single slot few drops CIA glue Its done No gouging pinning hinge pins worry about Incredibly strong Virtually indestructible 24 hinges 0295 P0 Box 1743 Marcos CA 92069 WETPOXY SAFE OXY unique two-component epoxy laminating system developed offer user safest highest quality laminating resin available VA Pt Kit- $1400 VA Ot Kit- $2100 Glass Cloth 58 oz/sq yd 38x6ft-$90038xl5ft-$1900 38x30ft-$3500 add $250 Ship & Hand above inems Send SASE additional information AcPs Ughtweight comsite Materials Order COD Send check Money Order AEROSPACE COMPOSITE PRODUCTS P0 Boa 16621 IDept Al Irvine CA 92714 Source tor Lightweight Materials JU-635/Nelson Continued page 162 Fokker D-VII VK Model Aircraft PO Box 3007 Aurora 1160505 312-357-1883 after piston has started downward engine connect 1 -volt battery Incidentally ignition occurs points proceed start engine engine will opennot close After engine run giow plug long battery running spark timing advanced moving connected will allow get fuel timer arm against direction propeller regulated hassle ignition sys rotation until maximum rpm obtained tem technique good way isolate fuel problems ignition problems Run ignition engine times until thoroughiy acquainted its operation before install airplane head flying field start engine open needle valve three four turns choke engine turning propeller holding finger over air intake will draw fuel engine Retard spark energize ignition system Crank engine normal manner until starts Adjust needle valve spark advance alternately until engine running properly engine fails start remove spark plug lead high-tension lead spark plug hold its end near engine neighborhood urning prop watching high-voltage spark will quickly learn good idea touch bare end high-tension lead part engine part body cranking engine no spark try advancing ignition timer bit since may have retarded much sparking cannot occur Also check see points clean dry proper clearanceabout 012 RMcM Oil points will create insulating film prevent sparking Other causes no spark poor electrical connections bad batteries broken hookup wires have spark engine doesnt fire check fouled spark plug Remove plug hook high-tension lead its normal spot plug hold metal base plug against engine rotating prop ignition system course should see good hot spark jump between spark plug electrodes plug fouled oil wont work Also just automobile spark plugs possible plug have internal failure will prevent firing Its always good idea carry spare spark plug flying field ignition system checks out experiment needle valve setting prime engine few drops fuel exhaust port else fails screw giow plug Catalogs Ijust received neat catalog OldTimer Model Supply PO Box 7334 Van Nuys CA 91409 OTMS operated Ken Sykora longtime enthusiast Old-Timer modeling have read articles SCIF newsletter Flightplug signs King Sugar Ken offers hard-to-locate items mainly rubber-power field including extensive inventory rubber-model plans Stahi Struhl Lindberg Comet Megow Scien tific etc New tools also received sample new sanding block called appropriately GrateShapes come grit bonded surfaces sold shapes including flats grooves making V-shaped edges radiuses suitable leading edges other curved model parts round bars really work well manufacturer Bell Rock Indus tries 6486 Hwy 179Suite 108 Sedona AZ 86336 See ad magazine Clarence Haught 3226 Honeysuckle Dr Coeur dAlene ID 83814 FF Duration/Murphy Continued page 73 fire As added precaution have small fire extinguisher keep handy never know light structures may take few seconds steam steam very hot get fingers too close vapor either have pair old insulated winter work gloves use procedure work fine Heavy structures like large wing Gas model take longer soak steam before becoming pliable enough reshape What steam does induce moisture wood struc ture balsawood gets very soft pliable moisture added move model component out steam retain overbend hold short time until area cools somewhat results either too drastic still satisfactory repeat process until have warp-free panel specific warp situation desire can repeat process times slightest dam age model may wish check model few days see warp results holding place simple process very few models escape least teakettle session before finding way test field hope helps offspring say get steamed quite often What mean 1988 SAM Champs 1987 SAM Society Antique Modelers Championships ongoing Seguin TX writing Meanwhile plans proceeding 1988 Midwest-sponsored ver sion held Mid America Airport near Lawrenceville IL Bob Larsh SAM Midwest VP has advised arrangements have firmed up Vincennes University officials dormi tories bean feed banquet Vincennes just few miles back across Red Skelton Bridge spans mighty Wabash River separates Indiana Illinois area dates yet confirmed will prob ably mid-July enable local farmers bring potato crop before big-footed Free Flighters show up Bob says official flying will span four days all-day MECA Model Engine Collectors Association Collectogether ing scheduled day preceding took two-day Old-Timer Free Right Contest last June sponsored host clubs Tri-County Aero Club TCAC SAM 57 SAM chapter based Marion IL guys gals certainly looking ward big event 88 Sounds like great fun will giving exact dates other pertinent details next column Keep listen ing Meanwhile see ya downwind Harry Murphy 3824 Oakwood Blvd Ander son IN 46011 FF Scale/Warner Continued page 75 Box 13 Braintree MA 02184 Delays answer ing correspondence filing orders have due some bad luck Joe has neverto knowledgecashed customers check until merchandise its way Having trouble getting silk tight models days Ill admit have real bear time last two planes cover wet silk have beautifully tight wrinide free plane start apply dope yet have piece wrinkled sagging garbage finish desperation finally set aside namebrand nitrate dope Sig Lite-Cote used some nut-brown GI surplus nitrate Bobby Chambers gave years ago Despite its age having turned color tightened up sadlooking covering beautifully warned nitrate dope nitrate dope anyone knows good reliable tautening opposite nontautening popular jargon nitrate dope let us old supplies running low Continued page 172 170 Model Aviation
