DYNA-JET HISTORY will subject months column will continued next July column Gerald L Jerry Wiles Bradford OH has graciously taken task writing abridged history remarkable power plant modelers enjoy have asked times developed Dyna-Jet engine long last enclosed account some history Dyna-Jet engine dis cussed last year telephone letter Also en closed few pictures descriptions perti nent account selected copied 8 x 10 originals loaned Bill Ten ney Jerry Nolin ough Bill Jerry checked narrative accuracy words opinions part own Dyna-Jet Its Manufacturers An Abridged History William L Tenney WLT formed Aeromarine Company 1945 main purpose develop two-cycle engines advanced design Charles B Marks first employ ee cheerful free-spirited man talents very casual outlook Largely self-taught Charlie performed tasks company cluding engineer machinist mechanic draftsman others within wide range skills interests incidentally also extremely inquisitive last-named trait led Charlie sidetrack primary assignments favor new curiosAeromarine made derivative products based Dyna-Jet technology USAF portable engine preheater L designated HUP-40 1952 Berkeiey Modeis Squirt first kit pianes Dyna-Jet power 1948 Super Squirt came out iater ity became intrigued very audible tests pulsejet engine German V-I Buzz Bomb being conducted Wright Field across road Aeromarine time Bill fully aware two-cycle engine work being neglected Charlie put together small pulsejet own design Made machined parts shell casing plumbing pipe fit tings Bills later comment indicated mixed emotions Unfortunately ran made several versions including some incorporated double-edged razor blades valve reeds Though could made run Continued page 169 Aeromarines founder Bill Tenny L prototype Dyne-Jet first Jet CL model 1946 GR Noun Joe Fallos Dyna-Jet-powered demonstration models Ra Sport Scale Bell X-1 1948 used fuselage shell FF Skyvahi 62 Model Aviation Control Lne Speed Gene Hempel 301 N Yale Dr Garland TX 75042 Some puisejems wnicn nave manufactured various countries clockwise start ing Top Right AFM-500 Germany OS Jet Ii Japan Dyna-Jet Red Head USA Thunder-Jet H-i Japan MEW 307 USA Minuet USA Aero-Jet Nr 1 Germany DyneJet first production version USA Tigerjet Japan Sonajet * LIVE INDOOR MODEL DEMONSTRATIONS IMS COMES * BOAT POND * CAR TRACKApril 30 May 11988 * SWAP SHOP *GIANTRAFFLETrade-Only Day Friday ApnI 29 popular demand International Modeler Show well known producing best model hobby show West coming ATLANTA April/May 1988 present same great model hobby show Southeast hun dred major model manufacturers over US have already registered exhibit premier annual extravaganza See latest products visit major manufacturers distributors Model Aircraft l Boats l Cars l Engines Radio Control Systems l Railroads ling Accessories STATIC DISPLAY COMPETITION IN MANY CATEGORIES INTERNATIONAL d1L MODELER PO Box 10127 Costa Mesa California 92627-0031 GEORGIA WORLD CONGRESS CENTER 285 International Blvd NW Atlanta GA SATURDAY APRIL 30 1988 10 am 6 pm SUN DAY MAY 1 1988 10 am 5am ADMISSION Adults $500 Juniors 12 under $300 Children under six free accompanied adult Phone 714 548-4700 ago Tom finished fourth place origi nal Big Bird powered course trade mark Merco 61 Tom pointed out 26 entries nation population 20 million compares favorably 50 70 fliers US Stunt Nats garners over 220 million Americans message Last item Ive just received word Doug Figgs former PAMPA secretary Event Di rector 1985 Nats Chicopee has agreed honors again year Norfolk Nats As always Doug will need lots help just love around good Stunt folks want participate yet another grand Nats happening contact Doug 329 Lincoln Place Brooklyn NY 11238 volunteer services CL Speed/Hempel Continued page 62 power reliability usually lacking advent Minijet its increasingly ob vious limitations specific requirements es tablished Aeromarines design Among oth ers simpler make operate lower-priced Minuet final design exceeded goals first marketed 1946 Dyna-Jet Bill WLT planned return boyhood home near Minneapolis once released Army Air Corps preparation transfer moved Aeromarmnes official mailing address city time 1946 Changing mind Bill moved company resi dence Harshman House near Dayton municipal airport Vandalia OH shared small building Don Davis Unidev Corporation Later occupying entire building Aeromarine remained until its shutdown late 1952 close friend Charlies hired help develop tooling necessary subcontractors use producing Dyna-Jet pans Like Charlie other Aeromarmne people later Sco yule Knox skills interests beyond trade toolmaker Among other contribu tions worked out system draw-forming combustion chamber/tailpipe 321 corro sion-resisting sheet steel Other skilled people hired aid man ufacturing new engine no true modelers among until GR Jerry No un came 1947 WW II Mustang pilot Jerry FF enthusiast long standing inter ests soon included Control Liners Today holds AMA Duration record Indoor Cate gory IV Easy B Open competition Joe Fallo employed nearby US Air Force Museum designed built Dyna-Jet powered models Jerry others demon strate contests Plans Joes Speedster included new Dyna-Jet package Once engine marketed became na tionally known few model kits designed Dyna-Jet power produced several com panies Like today commercial ver sions scratch-built private designs first successful Harold Buntings Hell-to-Hold put Out Berkeley Squirt Stunt model produced along few Scale sport types Although known others planned seem have no 10 models actually kitted suitable Dyna-Jetincluding foreign manufacturers Charlie Marks left Aeromarine return Gone forever nightmare heli-flier dreads stepping 3 foot tenna ripping oft front prized chopper just iCs ready fly Base loaded short WHIP ANTENNA Jng can mounted project front helicopter inside canopy virtually invisible c3OPPAM MODeL PRODUCTS 23961 CRAFTSMAN RD CALABASAS CA 91302 818 992-0195 218 VERNON ROAD GREENVILLE PA 16125 412 588-1321 May1988 169 Whip Antenna Gives Hidden Performance 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
Edition: Model Aviation - 1988/05
Page Numbers: 62, 169, 170
DYNA-JET HISTORY will subject months column will continued next July column Gerald L Jerry Wiles Bradford OH has graciously taken task writing abridged history remarkable power plant modelers enjoy have asked times developed Dyna-Jet engine long last enclosed account some history Dyna-Jet engine dis cussed last year telephone letter Also en closed few pictures descriptions perti nent account selected copied 8 x 10 originals loaned Bill Ten ney Jerry Nolin ough Bill Jerry checked narrative accuracy words opinions part own Dyna-Jet Its Manufacturers An Abridged History William L Tenney WLT formed Aeromarine Company 1945 main purpose develop two-cycle engines advanced design Charles B Marks first employ ee cheerful free-spirited man talents very casual outlook Largely self-taught Charlie performed tasks company cluding engineer machinist mechanic draftsman others within wide range skills interests incidentally also extremely inquisitive last-named trait led Charlie sidetrack primary assignments favor new curiosAeromarine made derivative products based Dyna-Jet technology USAF portable engine preheater L designated HUP-40 1952 Berkeiey Modeis Squirt first kit pianes Dyna-Jet power 1948 Super Squirt came out iater ity became intrigued very audible tests pulsejet engine German V-I Buzz Bomb being conducted Wright Field across road Aeromarine time Bill fully aware two-cycle engine work being neglected Charlie put together small pulsejet own design Made machined parts shell casing plumbing pipe fit tings Bills later comment indicated mixed emotions Unfortunately ran made several versions including some incorporated double-edged razor blades valve reeds Though could made run Continued page 169 Aeromarines founder Bill Tenny L prototype Dyne-Jet first Jet CL model 1946 GR Noun Joe Fallos Dyna-Jet-powered demonstration models Ra Sport Scale Bell X-1 1948 used fuselage shell FF Skyvahi 62 Model Aviation Control Lne Speed Gene Hempel 301 N Yale Dr Garland TX 75042 Some puisejems wnicn nave manufactured various countries clockwise start ing Top Right AFM-500 Germany OS Jet Ii Japan Dyna-Jet Red Head USA Thunder-Jet H-i Japan MEW 307 USA Minuet USA Aero-Jet Nr 1 Germany DyneJet first production version USA Tigerjet Japan Sonajet * LIVE INDOOR MODEL DEMONSTRATIONS IMS COMES * BOAT POND * CAR TRACKApril 30 May 11988 * SWAP SHOP *GIANTRAFFLETrade-Only Day Friday ApnI 29 popular demand International Modeler Show well known producing best model hobby show West coming ATLANTA April/May 1988 present same great model hobby show Southeast hun dred major model manufacturers over US have already registered exhibit premier annual extravaganza See latest products visit major manufacturers distributors Model Aircraft l Boats l Cars l Engines Radio Control Systems l Railroads ling Accessories STATIC DISPLAY COMPETITION IN MANY CATEGORIES INTERNATIONAL d1L MODELER PO Box 10127 Costa Mesa California 92627-0031 GEORGIA WORLD CONGRESS CENTER 285 International Blvd NW Atlanta GA SATURDAY APRIL 30 1988 10 am 6 pm SUN DAY MAY 1 1988 10 am 5am ADMISSION Adults $500 Juniors 12 under $300 Children under six free accompanied adult Phone 714 548-4700 ago Tom finished fourth place origi nal Big Bird powered course trade mark Merco 61 Tom pointed out 26 entries nation population 20 million compares favorably 50 70 fliers US Stunt Nats garners over 220 million Americans message Last item Ive just received word Doug Figgs former PAMPA secretary Event Di rector 1985 Nats Chicopee has agreed honors again year Norfolk Nats As always Doug will need lots help just love around good Stunt folks want participate yet another grand Nats happening contact Doug 329 Lincoln Place Brooklyn NY 11238 volunteer services CL Speed/Hempel Continued page 62 power reliability usually lacking advent Minijet its increasingly ob vious limitations specific requirements es tablished Aeromarines design Among oth ers simpler make operate lower-priced Minuet final design exceeded goals first marketed 1946 Dyna-Jet Bill WLT planned return boyhood home near Minneapolis once released Army Air Corps preparation transfer moved Aeromarmnes official mailing address city time 1946 Changing mind Bill moved company resi dence Harshman House near Dayton municipal airport Vandalia OH shared small building Don Davis Unidev Corporation Later occupying entire building Aeromarine remained until its shutdown late 1952 close friend Charlies hired help develop tooling necessary subcontractors use producing Dyna-Jet pans Like Charlie other Aeromarmne people later Sco yule Knox skills interests beyond trade toolmaker Among other contribu tions worked out system draw-forming combustion chamber/tailpipe 321 corro sion-resisting sheet steel Other skilled people hired aid man ufacturing new engine no true modelers among until GR Jerry No un came 1947 WW II Mustang pilot Jerry FF enthusiast long standing inter ests soon included Control Liners Today holds AMA Duration record Indoor Cate gory IV Easy B Open competition Joe Fallo employed nearby US Air Force Museum designed built Dyna-Jet powered models Jerry others demon strate contests Plans Joes Speedster included new Dyna-Jet package Once engine marketed became na tionally known few model kits designed Dyna-Jet power produced several com panies Like today commercial ver sions scratch-built private designs first successful Harold Buntings Hell-to-Hold put Out Berkeley Squirt Stunt model produced along few Scale sport types Although known others planned seem have no 10 models actually kitted suitable Dyna-Jetincluding foreign manufacturers Charlie Marks left Aeromarine return Gone forever nightmare heli-flier dreads stepping 3 foot tenna ripping oft front prized chopper just iCs ready fly Base loaded short WHIP ANTENNA Jng can mounted project front helicopter inside canopy virtually invisible c3OPPAM MODeL PRODUCTS 23961 CRAFTSMAN RD CALABASAS CA 91302 818 992-0195 218 VERNON ROAD GREENVILLE PA 16125 412 588-1321 May1988 169 Whip Antenna Gives Hidden Performance 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
Edition: Model Aviation - 1988/05
Page Numbers: 62, 169, 170
DYNA-JET HISTORY will subject months column will continued next July column Gerald L Jerry Wiles Bradford OH has graciously taken task writing abridged history remarkable power plant modelers enjoy have asked times developed Dyna-Jet engine long last enclosed account some history Dyna-Jet engine dis cussed last year telephone letter Also en closed few pictures descriptions perti nent account selected copied 8 x 10 originals loaned Bill Ten ney Jerry Nolin ough Bill Jerry checked narrative accuracy words opinions part own Dyna-Jet Its Manufacturers An Abridged History William L Tenney WLT formed Aeromarine Company 1945 main purpose develop two-cycle engines advanced design Charles B Marks first employ ee cheerful free-spirited man talents very casual outlook Largely self-taught Charlie performed tasks company cluding engineer machinist mechanic draftsman others within wide range skills interests incidentally also extremely inquisitive last-named trait led Charlie sidetrack primary assignments favor new curiosAeromarine made derivative products based Dyna-Jet technology USAF portable engine preheater L designated HUP-40 1952 Berkeiey Modeis Squirt first kit pianes Dyna-Jet power 1948 Super Squirt came out iater ity became intrigued very audible tests pulsejet engine German V-I Buzz Bomb being conducted Wright Field across road Aeromarine time Bill fully aware two-cycle engine work being neglected Charlie put together small pulsejet own design Made machined parts shell casing plumbing pipe fit tings Bills later comment indicated mixed emotions Unfortunately ran made several versions including some incorporated double-edged razor blades valve reeds Though could made run Continued page 169 Aeromarines founder Bill Tenny L prototype Dyne-Jet first Jet CL model 1946 GR Noun Joe Fallos Dyna-Jet-powered demonstration models Ra Sport Scale Bell X-1 1948 used fuselage shell FF Skyvahi 62 Model Aviation Control Lne Speed Gene Hempel 301 N Yale Dr Garland TX 75042 Some puisejems wnicn nave manufactured various countries clockwise start ing Top Right AFM-500 Germany OS Jet Ii Japan Dyna-Jet Red Head USA Thunder-Jet H-i Japan MEW 307 USA Minuet USA Aero-Jet Nr 1 Germany DyneJet first production version USA Tigerjet Japan Sonajet * LIVE INDOOR MODEL DEMONSTRATIONS IMS COMES * BOAT POND * CAR TRACKApril 30 May 11988 * SWAP SHOP *GIANTRAFFLETrade-Only Day Friday ApnI 29 popular demand International Modeler Show well known producing best model hobby show West coming ATLANTA April/May 1988 present same great model hobby show Southeast hun dred major model manufacturers over US have already registered exhibit premier annual extravaganza See latest products visit major manufacturers distributors Model Aircraft l Boats l Cars l Engines Radio Control Systems l Railroads ling Accessories STATIC DISPLAY COMPETITION IN MANY CATEGORIES INTERNATIONAL d1L MODELER PO Box 10127 Costa Mesa California 92627-0031 GEORGIA WORLD CONGRESS CENTER 285 International Blvd NW Atlanta GA SATURDAY APRIL 30 1988 10 am 6 pm SUN DAY MAY 1 1988 10 am 5am ADMISSION Adults $500 Juniors 12 under $300 Children under six free accompanied adult Phone 714 548-4700 ago Tom finished fourth place origi nal Big Bird powered course trade mark Merco 61 Tom pointed out 26 entries nation population 20 million compares favorably 50 70 fliers US Stunt Nats garners over 220 million Americans message Last item Ive just received word Doug Figgs former PAMPA secretary Event Di rector 1985 Nats Chicopee has agreed honors again year Norfolk Nats As always Doug will need lots help just love around good Stunt folks want participate yet another grand Nats happening contact Doug 329 Lincoln Place Brooklyn NY 11238 volunteer services CL Speed/Hempel Continued page 62 power reliability usually lacking advent Minijet its increasingly ob vious limitations specific requirements es tablished Aeromarines design Among oth ers simpler make operate lower-priced Minuet final design exceeded goals first marketed 1946 Dyna-Jet Bill WLT planned return boyhood home near Minneapolis once released Army Air Corps preparation transfer moved Aeromarmnes official mailing address city time 1946 Changing mind Bill moved company resi dence Harshman House near Dayton municipal airport Vandalia OH shared small building Don Davis Unidev Corporation Later occupying entire building Aeromarine remained until its shutdown late 1952 close friend Charlies hired help develop tooling necessary subcontractors use producing Dyna-Jet pans Like Charlie other Aeromarmne people later Sco yule Knox skills interests beyond trade toolmaker Among other contribu tions worked out system draw-forming combustion chamber/tailpipe 321 corro sion-resisting sheet steel Other skilled people hired aid man ufacturing new engine no true modelers among until GR Jerry No un came 1947 WW II Mustang pilot Jerry FF enthusiast long standing inter ests soon included Control Liners Today holds AMA Duration record Indoor Cate gory IV Easy B Open competition Joe Fallo employed nearby US Air Force Museum designed built Dyna-Jet powered models Jerry others demon strate contests Plans Joes Speedster included new Dyna-Jet package Once engine marketed became na tionally known few model kits designed Dyna-Jet power produced several com panies Like today commercial ver sions scratch-built private designs first successful Harold Buntings Hell-to-Hold put Out Berkeley Squirt Stunt model produced along few Scale sport types Although known others planned seem have no 10 models actually kitted suitable Dyna-Jetincluding foreign manufacturers Charlie Marks left Aeromarine return Gone forever nightmare heli-flier dreads stepping 3 foot tenna ripping oft front prized chopper just iCs ready fly Base loaded short WHIP ANTENNA Jng can mounted project front helicopter inside canopy virtually invisible c3OPPAM MODeL PRODUCTS 23961 CRAFTSMAN RD CALABASAS CA 91302 818 992-0195 218 VERNON ROAD GREENVILLE PA 16125 412 588-1321 May1988 169 Whip Antenna Gives Hidden Performance 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