FUEL COMPOSITION Over past few months have several inquiries concerning composition now-mandatory 10%-nitro fuel used majority Control Line Racing events past standard misconception oil selection and/or combination ultimate importance high-nitro fuels Obvious ly concentration oil type blend oils used critical combination and/or selection oil critical 10%-nitro fuel nitro concentrations Racing fuels past running 60% 70% possible have engine actually mediocrerunning piece equipment perform quite satis factorily using high-nitro necessary boost performance Unfortunately present 10%-nitro rule find checking air speeds various contests almost competitor has same performance fellows now squeezing engines ounce rpm hence oil type concentration becomes critical years past ran infrared spectrophotometric well gas chromatographic tests major ity oils used composite fuels sold Racing fraternity general found looking functional fluid similar form Union Carbides LB525 625 1145 MA2270 Three oils contain no antioxidant consequently oiling down engine run fuel containing such oil manda tory lubricant itself draws moisture promotes rust MA2270 contains anti oxidant minimizes rusting Using trial error found LB625 other similar polyglycol types used conjunction white refined castor oil having concentration about 5% total fuel volume seemed work quite satisfactorily addition 2%-5% castor oil minimized en gine damage during extremely lean run Any fuel having nitromethane concentration above approximately 40% will cause straight castor oil become insoluble situation manifests itself small globules castor oil floating fuel solution results unsat isfactory engine lubrication old days shot nitrobenzine has subsequently found extremely toxic added fuel mutual solvent keep oil suspension Over years have seen competitors using fuel having nitro concentrations 50% 60% 70% using oil concentrations low 15% high 25% depending application Most Racing competitors have settied 20% oil concentration 15% being functional fluid some specific weight rest being white refined castor oil combina tion seems work quite satisfactorily mandatory 10%-nitro fuel big problems low performance en gine overheating using new 10%-nitro fuel caused water being absorbed large quantity almost 80% total mixture methyl alcohol fuel mix As know methanol water scavenger humid day fuel supplier used methanol appreciable degree trapped water perform ance engine using such fuel could re duced 1% 2% included water will re sult performance drop appreciably higher engine operating temperature same atmospheric conditions compared en gine running fuel containing less 02% water Unfortunately competitors get alco hol five-gallon containers 55-gallon drums use desiccant air filter containers vent alcohol removed container As volume alcohol reduced container atmospheric air course drawn container pos sible air may contain high enough per centage humidity contaminate alcohol have noticed Speed competitors pur chasing anhydrous methanol keep water level blended fuel absolute minimum Generally fuel mixtures based volume typical measure being 128 fluid ounces gallon quantities oil oils alcohol Continued page 170 Left Juniors Seniors fly Open Rat Racing have work cut out picture sure whether pilot standing behind left holding colleague keep him circleor using him keep himself wandering Fast Rats difficult negotiate properly Right Larry Dzlak Jr John Ballard circle center during Open Scale Racing heat John just passing Larry May 1988 63 Control Line Racing John Ballard 10102 Klmblewick Dr Louisville KY 40223 Left Ken Hicks ready smartly hit prop Dick Lamberts Viper Note extremely short battery leads require battery mounted very close Kens hand Adjust ing rheostat battery gives proper amount power glow plug case metal engine pan used ground wire running glow plug board side Right Heres hot glove system V2A Mouse Racer Battery leads tached metal contacts index finger thumb thumb contact grounds fuel tank index finger contact goes small spring steel wire attached glow plug provides positive battery connection Cox 049 using Quick Clip petroleum business improvements Dyna-Jet continued Scovy Knox applied ideas both Charlies own increase power almost 30% significant increases production costs Labelled Red Head engines developed 4/2 lb thrust however fine-tuning would usually bring rest level control costs however Jerrys suggestion accepted power advertised 4A lb since virtually engines reached thrust individual adjustments 1948 Glenn Temte Bob Thor created sophisticated Jet Speed model set long standing official AMA record 179 mph Unfortunately both previous subsequent flights sixth series similar designs did attain such speeds Consequent ly hobby suspected mistiming record flight What makes speed especially surprising realization todays exotic fuels extensive engine modifications used known time Dyna-Jet its very low time fuel consumption aroused Air Force interest result development 35-lb -thrust en gine utilized five modified Dyna-Jet valve heads seven-inch-diameter four-foot-long design Also investigated very high heat output small pulsejets consequence Aero informative Jet article will concluded next CL Speed column mean time start building Jet-powered Sport Speed modeland have fun CL Racing/Ballard Continued page 63 nitromethane can calculated using percentages total 128 oz gives number fluid ounces ingredient sum total individual ingre dients should equal 128 fluid ounces final item respect 10%-nitro higher fuels temperature sensitiv ity single- double-A castor soybean oils oils fairly sensitive cold temper atures below about 450 F high nitro concentrations occasions have seen competitors warming up fuel inside cars containers under hood sitting next hot radiator purpose keep oil precipitating out mixture old Speed fuels containing soybean oil would below 500 F form white cloud oil droplets situation would certainly provide adequate lubrication Speed engines several cases early spring season flying found unusually cold day fuel would become cloudy indicating oil coming anywhere near being soluble compatible fuel mixture Drilling tapping magnesium pan majority Rat Racers Speed ships rely molded pan made aluminum/magnesium alloy bottom portion fuselage pan generally supports engine fuel tank top structure aircraft well landing gear tail skid pans have found extremely fragile great care necessary finishing operations such smoothing exterior grinding out interior fit engine drilling tapping holes avoid distortions Insufficient care op erations will result hairline cracks appearing later datethereby rendering pan useless Over years have found best methods holding pan stationary posi tion drilling tapping holes use wooden miter box utilizing C-clamps mo tor mount wood miter box brace pan pan can securely mounted box out stressing metal use extremely sensi tive level make sure pan per pendicular drill bit also square dimensions have also found excellent method taching tail skids past have always presented problems bending breaking off About inch end pan drill hole angle 300 bottom pan tap hole 6-32 tap get piece spring steel landing gear wire put 6-32 threads end Put small bend unthreaded end wire can screwed pan becoming unbendable unbreakable tail skid drop two super glue Loctite will prevent loosening tail skid have also inquiries concerning re pairing pan has stress crack around bolt hole ground thin has cracked after hard landing Unfortunately after pan has used model aircraft two flights aluminum/magnesium alloy absorbs enormous amount penetrating lubrication oil engine overflow fuel tank during pit stops impossible 170 Model Aviation marine received several contracts develop portable ground-based preheaters air-cooled aircraft engines operations low zero Todays Lennox Pulse-Aire furnace system uses same principle such heater used mod ified Hornet model engine magneto supply its starting spark CA MASK CA glue works wonders building models right Unfortunately gives off enough fumes knock vulture off carcass modelers have suffered medical problems after inhaling CA fumes take chances special vapor respirator filters CA fumes soft face mask adjustable sI raps comfortably fits face sizes easy breathing valve allows prolonged use providing dependable filtering concentrations up 1000 PPM though rugged industrial mask light weight elimi nate fatigue Dont get gassed CA Get protected Order CA Mask today Just $1247 shipping cheaper hospital visit Money order Master Charge Visa include expiration date check allow 20 days clear Sorry no CODs Pelican Enterprises Inc 265 OXFORD LANE BLOOMINGDALE ILLINOIS 60108 P S Send catalog modelers safety supplies satisfactory job getting material out pores metal repairs virtually impossible myself must have least 25 Har ters proto pans have rendered use less small cracks around various tapped mount ing holes Nelson Funny Plug evaluations have just finished rather extensive evaluation Nel son Funny Plug 4L iL models plus Nelson one-piece plug first observation 10%-nitro fuel much less taxing element three plugs 50%75%-nitro fuel used past Depending upon head clearance both 15 40 cu engines iL Funny Plug off 100-600 rpm 4L same head clearance Apparent ly 4L plug runs just shade hotter lL General head clearance both 15 Scale Rac ing engines 008 012 head clear ance Rat Race 40 constant-diameter pipe 010 015 K&B 40 engines require approximately 005-008 additional head clearance compared Supertigre 40 one-piece Nelson Funny Plug seems run about 200 rpm better 4L making best performer three candidates Unfortu nately its element somewhat thin find biggest distortion factor setting rheostat GloBee battery batterys amperage-level rheostat moved farther half distance its travel plug glows extremely bright distorts quickly en gine starts compression hits wire course peephole effect plug mini mizes element distortion element glowing bright under battery power distortion imminent carefully adjusting rheostat plug can caused give very faint glow very little distortion element after running pitting situation will course different battery type used important gauge connecting wire its length battery setup will have tached aircraft glow plugs heat ob served make sure rheostat adjusted properly Longer heavier-gauge wire will re quire higher setting rheostat Heavier lower-gauge and/or shorter wires will result opposite condition phenomenon also evident iL 4L plugs faint glow distinguishable plugs bat tery connected reliable starting impossible Cox 049 Mouse Racing engines have object another rather extensive study will share results next July column honest opinion temperamental Racing engines As always solicit comments photos Pilatus PC-9/Haught Continued page 66 side dry add leading edge fair ings look neat add con siderable strength well fairings drying sand the fin rudder glue together offset shown pians Glue assembled fin rudder fuselage top Use drafting triangle make sure everything square Add dorsal fin wing built two halves joined * Superior Igniters Improve starting Idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion Afterrun oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed SIG CHAMPION 2-STROW FREE SHIPPING ON ORDERS OVER $1500FREIGHT COLLECT PINTQUART GALLON55 GAL DRUM 0%Nitromethane$315$450$1075$19695 5%Nitromethane$365$525$1275$26495 10%Nitromethane$415$550$1475$32995 15%Nitromethane$430$635$1675$38995 25%Nitromethane$515$795$2195$52495 35%Nitromethane$595$925$2695$66995 SIG PREMIL M -SThCI L itromethane$1425$29995 15%Nitromethane$1625 I$36495 THE CHOiCF ci KHAM K YS over 20 years SIG has blending finest quality model engine fuel available using st quality ingredients instance Methanol use 995% pure very best grade y can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume od percentage weight SIG fuels contam 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based rience sincerely believe finest quality fuel can made price k dont take word try some judge yourself poces sosiect coenge sothoot notice See dealer first available order direct Call J 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO. Montezuma IA 50171 988 171 Paper Flying Scale Model Airplane $7 00 *ttJ PARTS PRE-CUT & PRE-PAINTED *BUILD & FLY IN TWO HOURS -I Ib CATALOG $750 Contains 1000s p~er airplanes Prom hostage stamp size 6 foot wing span Gliders rubber powered Diecut youcut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDING CataLog AIR papa aLtptana abova $1050 pluh $250 potaga p
Edition: Model Aviation - 1988/05
Page Numbers: 63, 170, 171
FUEL COMPOSITION Over past few months have several inquiries concerning composition now-mandatory 10%-nitro fuel used majority Control Line Racing events past standard misconception oil selection and/or combination ultimate importance high-nitro fuels Obvious ly concentration oil type blend oils used critical combination and/or selection oil critical 10%-nitro fuel nitro concentrations Racing fuels past running 60% 70% possible have engine actually mediocrerunning piece equipment perform quite satis factorily using high-nitro necessary boost performance Unfortunately present 10%-nitro rule find checking air speeds various contests almost competitor has same performance fellows now squeezing engines ounce rpm hence oil type concentration becomes critical years past ran infrared spectrophotometric well gas chromatographic tests major ity oils used composite fuels sold Racing fraternity general found looking functional fluid similar form Union Carbides LB525 625 1145 MA2270 Three oils contain no antioxidant consequently oiling down engine run fuel containing such oil manda tory lubricant itself draws moisture promotes rust MA2270 contains anti oxidant minimizes rusting Using trial error found LB625 other similar polyglycol types used conjunction white refined castor oil having concentration about 5% total fuel volume seemed work quite satisfactorily addition 2%-5% castor oil minimized en gine damage during extremely lean run Any fuel having nitromethane concentration above approximately 40% will cause straight castor oil become insoluble situation manifests itself small globules castor oil floating fuel solution results unsat isfactory engine lubrication old days shot nitrobenzine has subsequently found extremely toxic added fuel mutual solvent keep oil suspension Over years have seen competitors using fuel having nitro concentrations 50% 60% 70% using oil concentrations low 15% high 25% depending application Most Racing competitors have settied 20% oil concentration 15% being functional fluid some specific weight rest being white refined castor oil combina tion seems work quite satisfactorily mandatory 10%-nitro fuel big problems low performance en gine overheating using new 10%-nitro fuel caused water being absorbed large quantity almost 80% total mixture methyl alcohol fuel mix As know methanol water scavenger humid day fuel supplier used methanol appreciable degree trapped water perform ance engine using such fuel could re duced 1% 2% included water will re sult performance drop appreciably higher engine operating temperature same atmospheric conditions compared en gine running fuel containing less 02% water Unfortunately competitors get alco hol five-gallon containers 55-gallon drums use desiccant air filter containers vent alcohol removed container As volume alcohol reduced container atmospheric air course drawn container pos sible air may contain high enough per centage humidity contaminate alcohol have noticed Speed competitors pur chasing anhydrous methanol keep water level blended fuel absolute minimum Generally fuel mixtures based volume typical measure being 128 fluid ounces gallon quantities oil oils alcohol Continued page 170 Left Juniors Seniors fly Open Rat Racing have work cut out picture sure whether pilot standing behind left holding colleague keep him circleor using him keep himself wandering Fast Rats difficult negotiate properly Right Larry Dzlak Jr John Ballard circle center during Open Scale Racing heat John just passing Larry May 1988 63 Control Line Racing John Ballard 10102 Klmblewick Dr Louisville KY 40223 Left Ken Hicks ready smartly hit prop Dick Lamberts Viper Note extremely short battery leads require battery mounted very close Kens hand Adjust ing rheostat battery gives proper amount power glow plug case metal engine pan used ground wire running glow plug board side Right Heres hot glove system V2A Mouse Racer Battery leads tached metal contacts index finger thumb thumb contact grounds fuel tank index finger contact goes small spring steel wire attached glow plug provides positive battery connection Cox 049 using Quick Clip petroleum business improvements Dyna-Jet continued Scovy Knox applied ideas both Charlies own increase power almost 30% significant increases production costs Labelled Red Head engines developed 4/2 lb thrust however fine-tuning would usually bring rest level control costs however Jerrys suggestion accepted power advertised 4A lb since virtually engines reached thrust individual adjustments 1948 Glenn Temte Bob Thor created sophisticated Jet Speed model set long standing official AMA record 179 mph Unfortunately both previous subsequent flights sixth series similar designs did attain such speeds Consequent ly hobby suspected mistiming record flight What makes speed especially surprising realization todays exotic fuels extensive engine modifications used known time Dyna-Jet its very low time fuel consumption aroused Air Force interest result development 35-lb -thrust en gine utilized five modified Dyna-Jet valve heads seven-inch-diameter four-foot-long design Also investigated very high heat output small pulsejets consequence Aero informative Jet article will concluded next CL Speed column mean time start building Jet-powered Sport Speed modeland have fun CL Racing/Ballard Continued page 63 nitromethane can calculated using percentages total 128 oz gives number fluid ounces ingredient sum total individual ingre dients should equal 128 fluid ounces final item respect 10%-nitro higher fuels temperature sensitiv ity single- double-A castor soybean oils oils fairly sensitive cold temper atures below about 450 F high nitro concentrations occasions have seen competitors warming up fuel inside cars containers under hood sitting next hot radiator purpose keep oil precipitating out mixture old Speed fuels containing soybean oil would below 500 F form white cloud oil droplets situation would certainly provide adequate lubrication Speed engines several cases early spring season flying found unusually cold day fuel would become cloudy indicating oil coming anywhere near being soluble compatible fuel mixture Drilling tapping magnesium pan majority Rat Racers Speed ships rely molded pan made aluminum/magnesium alloy bottom portion fuselage pan generally supports engine fuel tank top structure aircraft well landing gear tail skid pans have found extremely fragile great care necessary finishing operations such smoothing exterior grinding out interior fit engine drilling tapping holes avoid distortions Insufficient care op erations will result hairline cracks appearing later datethereby rendering pan useless Over years have found best methods holding pan stationary posi tion drilling tapping holes use wooden miter box utilizing C-clamps mo tor mount wood miter box brace pan pan can securely mounted box out stressing metal use extremely sensi tive level make sure pan per pendicular drill bit also square dimensions have also found excellent method taching tail skids past have always presented problems bending breaking off About inch end pan drill hole angle 300 bottom pan tap hole 6-32 tap get piece spring steel landing gear wire put 6-32 threads end Put small bend unthreaded end wire can screwed pan becoming unbendable unbreakable tail skid drop two super glue Loctite will prevent loosening tail skid have also inquiries concerning re pairing pan has stress crack around bolt hole ground thin has cracked after hard landing Unfortunately after pan has used model aircraft two flights aluminum/magnesium alloy absorbs enormous amount penetrating lubrication oil engine overflow fuel tank during pit stops impossible 170 Model Aviation marine received several contracts develop portable ground-based preheaters air-cooled aircraft engines operations low zero Todays Lennox Pulse-Aire furnace system uses same principle such heater used mod ified Hornet model engine magneto supply its starting spark CA MASK CA glue works wonders building models right Unfortunately gives off enough fumes knock vulture off carcass modelers have suffered medical problems after inhaling CA fumes take chances special vapor respirator filters CA fumes soft face mask adjustable sI raps comfortably fits face sizes easy breathing valve allows prolonged use providing dependable filtering concentrations up 1000 PPM though rugged industrial mask light weight elimi nate fatigue Dont get gassed CA Get protected Order CA Mask today Just $1247 shipping cheaper hospital visit Money order Master Charge Visa include expiration date check allow 20 days clear Sorry no CODs Pelican Enterprises Inc 265 OXFORD LANE BLOOMINGDALE ILLINOIS 60108 P S Send catalog modelers safety supplies satisfactory job getting material out pores metal repairs virtually impossible myself must have least 25 Har ters proto pans have rendered use less small cracks around various tapped mount ing holes Nelson Funny Plug evaluations have just finished rather extensive evaluation Nel son Funny Plug 4L iL models plus Nelson one-piece plug first observation 10%-nitro fuel much less taxing element three plugs 50%75%-nitro fuel used past Depending upon head clearance both 15 40 cu engines iL Funny Plug off 100-600 rpm 4L same head clearance Apparent ly 4L plug runs just shade hotter lL General head clearance both 15 Scale Rac ing engines 008 012 head clear ance Rat Race 40 constant-diameter pipe 010 015 K&B 40 engines require approximately 005-008 additional head clearance compared Supertigre 40 one-piece Nelson Funny Plug seems run about 200 rpm better 4L making best performer three candidates Unfortu nately its element somewhat thin find biggest distortion factor setting rheostat GloBee battery batterys amperage-level rheostat moved farther half distance its travel plug glows extremely bright distorts quickly en gine starts compression hits wire course peephole effect plug mini mizes element distortion element glowing bright under battery power distortion imminent carefully adjusting rheostat plug can caused give very faint glow very little distortion element after running pitting situation will course different battery type used important gauge connecting wire its length battery setup will have tached aircraft glow plugs heat ob served make sure rheostat adjusted properly Longer heavier-gauge wire will re quire higher setting rheostat Heavier lower-gauge and/or shorter wires will result opposite condition phenomenon also evident iL 4L plugs faint glow distinguishable plugs bat tery connected reliable starting impossible Cox 049 Mouse Racing engines have object another rather extensive study will share results next July column honest opinion temperamental Racing engines As always solicit comments photos Pilatus PC-9/Haught Continued page 66 side dry add leading edge fair ings look neat add con siderable strength well fairings drying sand the fin rudder glue together offset shown pians Glue assembled fin rudder fuselage top Use drafting triangle make sure everything square Add dorsal fin wing built two halves joined * Superior Igniters Improve starting Idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion Afterrun oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed SIG CHAMPION 2-STROW FREE SHIPPING ON ORDERS OVER $1500FREIGHT COLLECT PINTQUART GALLON55 GAL DRUM 0%Nitromethane$315$450$1075$19695 5%Nitromethane$365$525$1275$26495 10%Nitromethane$415$550$1475$32995 15%Nitromethane$430$635$1675$38995 25%Nitromethane$515$795$2195$52495 35%Nitromethane$595$925$2695$66995 SIG PREMIL M -SThCI L itromethane$1425$29995 15%Nitromethane$1625 I$36495 THE CHOiCF ci KHAM K YS over 20 years SIG has blending finest quality model engine fuel available using st quality ingredients instance Methanol use 995% pure very best grade y can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume od percentage weight SIG fuels contam 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based rience sincerely believe finest quality fuel can made price k dont take word try some judge yourself poces sosiect coenge sothoot notice See dealer first available order direct Call J 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO. Montezuma IA 50171 988 171 Paper Flying Scale Model Airplane $7 00 *ttJ PARTS PRE-CUT & PRE-PAINTED *BUILD & FLY IN TWO HOURS -I Ib CATALOG $750 Contains 1000s p~er airplanes Prom hostage stamp size 6 foot wing span Gliders rubber powered Diecut youcut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDING CataLog AIR papa aLtptana abova $1050 pluh $250 potaga p
Edition: Model Aviation - 1988/05
Page Numbers: 63, 170, 171
FUEL COMPOSITION Over past few months have several inquiries concerning composition now-mandatory 10%-nitro fuel used majority Control Line Racing events past standard misconception oil selection and/or combination ultimate importance high-nitro fuels Obvious ly concentration oil type blend oils used critical combination and/or selection oil critical 10%-nitro fuel nitro concentrations Racing fuels past running 60% 70% possible have engine actually mediocrerunning piece equipment perform quite satis factorily using high-nitro necessary boost performance Unfortunately present 10%-nitro rule find checking air speeds various contests almost competitor has same performance fellows now squeezing engines ounce rpm hence oil type concentration becomes critical years past ran infrared spectrophotometric well gas chromatographic tests major ity oils used composite fuels sold Racing fraternity general found looking functional fluid similar form Union Carbides LB525 625 1145 MA2270 Three oils contain no antioxidant consequently oiling down engine run fuel containing such oil manda tory lubricant itself draws moisture promotes rust MA2270 contains anti oxidant minimizes rusting Using trial error found LB625 other similar polyglycol types used conjunction white refined castor oil having concentration about 5% total fuel volume seemed work quite satisfactorily addition 2%-5% castor oil minimized en gine damage during extremely lean run Any fuel having nitromethane concentration above approximately 40% will cause straight castor oil become insoluble situation manifests itself small globules castor oil floating fuel solution results unsat isfactory engine lubrication old days shot nitrobenzine has subsequently found extremely toxic added fuel mutual solvent keep oil suspension Over years have seen competitors using fuel having nitro concentrations 50% 60% 70% using oil concentrations low 15% high 25% depending application Most Racing competitors have settied 20% oil concentration 15% being functional fluid some specific weight rest being white refined castor oil combina tion seems work quite satisfactorily mandatory 10%-nitro fuel big problems low performance en gine overheating using new 10%-nitro fuel caused water being absorbed large quantity almost 80% total mixture methyl alcohol fuel mix As know methanol water scavenger humid day fuel supplier used methanol appreciable degree trapped water perform ance engine using such fuel could re duced 1% 2% included water will re sult performance drop appreciably higher engine operating temperature same atmospheric conditions compared en gine running fuel containing less 02% water Unfortunately competitors get alco hol five-gallon containers 55-gallon drums use desiccant air filter containers vent alcohol removed container As volume alcohol reduced container atmospheric air course drawn container pos sible air may contain high enough per centage humidity contaminate alcohol have noticed Speed competitors pur chasing anhydrous methanol keep water level blended fuel absolute minimum Generally fuel mixtures based volume typical measure being 128 fluid ounces gallon quantities oil oils alcohol Continued page 170 Left Juniors Seniors fly Open Rat Racing have work cut out picture sure whether pilot standing behind left holding colleague keep him circleor using him keep himself wandering Fast Rats difficult negotiate properly Right Larry Dzlak Jr John Ballard circle center during Open Scale Racing heat John just passing Larry May 1988 63 Control Line Racing John Ballard 10102 Klmblewick Dr Louisville KY 40223 Left Ken Hicks ready smartly hit prop Dick Lamberts Viper Note extremely short battery leads require battery mounted very close Kens hand Adjust ing rheostat battery gives proper amount power glow plug case metal engine pan used ground wire running glow plug board side Right Heres hot glove system V2A Mouse Racer Battery leads tached metal contacts index finger thumb thumb contact grounds fuel tank index finger contact goes small spring steel wire attached glow plug provides positive battery connection Cox 049 using Quick Clip petroleum business improvements Dyna-Jet continued Scovy Knox applied ideas both Charlies own increase power almost 30% significant increases production costs Labelled Red Head engines developed 4/2 lb thrust however fine-tuning would usually bring rest level control costs however Jerrys suggestion accepted power advertised 4A lb since virtually engines reached thrust individual adjustments 1948 Glenn Temte Bob Thor created sophisticated Jet Speed model set long standing official AMA record 179 mph Unfortunately both previous subsequent flights sixth series similar designs did attain such speeds Consequent ly hobby suspected mistiming record flight What makes speed especially surprising realization todays exotic fuels extensive engine modifications used known time Dyna-Jet its very low time fuel consumption aroused Air Force interest result development 35-lb -thrust en gine utilized five modified Dyna-Jet valve heads seven-inch-diameter four-foot-long design Also investigated very high heat output small pulsejets consequence Aero informative Jet article will concluded next CL Speed column mean time start building Jet-powered Sport Speed modeland have fun CL Racing/Ballard Continued page 63 nitromethane can calculated using percentages total 128 oz gives number fluid ounces ingredient sum total individual ingre dients should equal 128 fluid ounces final item respect 10%-nitro higher fuels temperature sensitiv ity single- double-A castor soybean oils oils fairly sensitive cold temper atures below about 450 F high nitro concentrations occasions have seen competitors warming up fuel inside cars containers under hood sitting next hot radiator purpose keep oil precipitating out mixture old Speed fuels containing soybean oil would below 500 F form white cloud oil droplets situation would certainly provide adequate lubrication Speed engines several cases early spring season flying found unusually cold day fuel would become cloudy indicating oil coming anywhere near being soluble compatible fuel mixture Drilling tapping magnesium pan majority Rat Racers Speed ships rely molded pan made aluminum/magnesium alloy bottom portion fuselage pan generally supports engine fuel tank top structure aircraft well landing gear tail skid pans have found extremely fragile great care necessary finishing operations such smoothing exterior grinding out interior fit engine drilling tapping holes avoid distortions Insufficient care op erations will result hairline cracks appearing later datethereby rendering pan useless Over years have found best methods holding pan stationary posi tion drilling tapping holes use wooden miter box utilizing C-clamps mo tor mount wood miter box brace pan pan can securely mounted box out stressing metal use extremely sensi tive level make sure pan per pendicular drill bit also square dimensions have also found excellent method taching tail skids past have always presented problems bending breaking off About inch end pan drill hole angle 300 bottom pan tap hole 6-32 tap get piece spring steel landing gear wire put 6-32 threads end Put small bend unthreaded end wire can screwed pan becoming unbendable unbreakable tail skid drop two super glue Loctite will prevent loosening tail skid have also inquiries concerning re pairing pan has stress crack around bolt hole ground thin has cracked after hard landing Unfortunately after pan has used model aircraft two flights aluminum/magnesium alloy absorbs enormous amount penetrating lubrication oil engine overflow fuel tank during pit stops impossible 170 Model Aviation marine received several contracts develop portable ground-based preheaters air-cooled aircraft engines operations low zero Todays Lennox Pulse-Aire furnace system uses same principle such heater used mod ified Hornet model engine magneto supply its starting spark CA MASK CA glue works wonders building models right Unfortunately gives off enough fumes knock vulture off carcass modelers have suffered medical problems after inhaling CA fumes take chances special vapor respirator filters CA fumes soft face mask adjustable sI raps comfortably fits face sizes easy breathing valve allows prolonged use providing dependable filtering concentrations up 1000 PPM though rugged industrial mask light weight elimi nate fatigue Dont get gassed CA Get protected Order CA Mask today Just $1247 shipping cheaper hospital visit Money order Master Charge Visa include expiration date check allow 20 days clear Sorry no CODs Pelican Enterprises Inc 265 OXFORD LANE BLOOMINGDALE ILLINOIS 60108 P S Send catalog modelers safety supplies satisfactory job getting material out pores metal repairs virtually impossible myself must have least 25 Har ters proto pans have rendered use less small cracks around various tapped mount ing holes Nelson Funny Plug evaluations have just finished rather extensive evaluation Nel son Funny Plug 4L iL models plus Nelson one-piece plug first observation 10%-nitro fuel much less taxing element three plugs 50%75%-nitro fuel used past Depending upon head clearance both 15 40 cu engines iL Funny Plug off 100-600 rpm 4L same head clearance Apparent ly 4L plug runs just shade hotter lL General head clearance both 15 Scale Rac ing engines 008 012 head clear ance Rat Race 40 constant-diameter pipe 010 015 K&B 40 engines require approximately 005-008 additional head clearance compared Supertigre 40 one-piece Nelson Funny Plug seems run about 200 rpm better 4L making best performer three candidates Unfortu nately its element somewhat thin find biggest distortion factor setting rheostat GloBee battery batterys amperage-level rheostat moved farther half distance its travel plug glows extremely bright distorts quickly en gine starts compression hits wire course peephole effect plug mini mizes element distortion element glowing bright under battery power distortion imminent carefully adjusting rheostat plug can caused give very faint glow very little distortion element after running pitting situation will course different battery type used important gauge connecting wire its length battery setup will have tached aircraft glow plugs heat ob served make sure rheostat adjusted properly Longer heavier-gauge wire will re quire higher setting rheostat Heavier lower-gauge and/or shorter wires will result opposite condition phenomenon also evident iL 4L plugs faint glow distinguishable plugs bat tery connected reliable starting impossible Cox 049 Mouse Racing engines have object another rather extensive study will share results next July column honest opinion temperamental Racing engines As always solicit comments photos Pilatus PC-9/Haught Continued page 66 side dry add leading edge fair ings look neat add con siderable strength well fairings drying sand the fin rudder glue together offset shown pians Glue assembled fin rudder fuselage top Use drafting triangle make sure everything square Add dorsal fin wing built two halves joined * Superior Igniters Improve starting Idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion Afterrun oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed SIG CHAMPION 2-STROW FREE SHIPPING ON ORDERS OVER $1500FREIGHT COLLECT PINTQUART GALLON55 GAL DRUM 0%Nitromethane$315$450$1075$19695 5%Nitromethane$365$525$1275$26495 10%Nitromethane$415$550$1475$32995 15%Nitromethane$430$635$1675$38995 25%Nitromethane$515$795$2195$52495 35%Nitromethane$595$925$2695$66995 SIG PREMIL M -SThCI L itromethane$1425$29995 15%Nitromethane$1625 I$36495 THE CHOiCF ci KHAM K YS over 20 years SIG has blending finest quality model engine fuel available using st quality ingredients instance Methanol use 995% pure very best grade y can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume od percentage weight SIG fuels contam 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based rience sincerely believe finest quality fuel can made price k dont take word try some judge yourself poces sosiect coenge sothoot notice See dealer first available order direct Call J 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO. Montezuma IA 50171 988 171 Paper Flying Scale Model Airplane $7 00 *ttJ PARTS PRE-CUT & PRE-PAINTED *BUILD & FLY IN TWO HOURS -I Ib CATALOG $750 Contains 1000s p~er airplanes Prom hostage stamp size 6 foot wing span Gliders rubber powered Diecut youcut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDING CataLog AIR papa aLtptana abova $1050 pluh $250 potaga p