U Joe Wagner CUA t 15 PERFORMANCE internal combustion engine depends much oxygen its able inhale burn fuel needs plenty Air contains about 21% oxygen cubic inch fuel/oil vapor enters glow model engines inlet roughly seven cubic inches air required complete combustion Diesels gasoline-fueled engines need about 12 cubic inches air numbers normal conditions hut conditions vary considerably much time model airplanes being flown Engines lose power hot weather air less dense increasing altitude Humidity also causes power loss whenever water vapor absorbed atmosphere takes place about 1/5 its volume oxygen Moist airs density low too what makes rise form clouds high above earth low barometric pressure impending weather change lowers airs density effects well-known full-scale aviation combined number called density altitude varies local conditions can find density altitude calling local airport As write July 14 4 pm air temperature near Pittsburgh PA 830 Farenheit hygrometer no means precision instrument indicates humidity about 80% airport located 860 feet above Mean Sea Level MSL however temperature humidity high right now density altitude airport 2200 feet means planning fly somewhere afternoon Cessna 172 youd have restrict its gross weight what could safely take off airport 2200 feet above sea level standard conditions model flier density altitude 2200 feet means engine will able put out 94% power could sea level Propeller thrust wing lift will suffer similar reductions calculate power loss subtract density altitude thousands feet 36 divide answer 36 will tell percentage normal engine power output possible density altitude 2200 feet 3622 338 33836 Theres variable can reduce density air engine breathes thus lessening models engines power output turbulence Bernoullis Principle states fluids static pressure drops fluid motion Air fluid turbulent air definition frantically motion reduces its effective density might suspect models engine running air behind its whirling propeller hub becomes exceedingly turbulent spinner air what front rotary model airplane engines compelled breathe combustion record-setting Hornet McCoy Dooling Control Line CL Speed engines yesteryear gained much superior performance being able take nonturbulent combustion air well behind fast-spinning propellers Although rear rotary engine contains moving part front rotary lacks rear rotor itself added power obtained inlet location maximum-density zeroApril 1998 59 1947 McCoy 49 set Control Line Speed records gained appreciable power rear intake location throttle location theres no injuring fingers prop adjusting needlethe OS 29 runs well ever Nelson 15 Team Racing dieselone best its classgood example modern high-power rear-rotary model engine turbulence air inside fuselage makes up friction rear rotary valve disk rotates against its sealing surface did interesting experiment several years ago OS 29 Radio Control RC engine wondered what would happen engines throttle assembly located just front fuel tank instead usual location behind propeller easy try mounted engine hardwood board removed throttle assembly replaced piece aluminum tubing fastened fuel tank other end board throttle just ahead tank front connected engine air inlet throttle 11-inch length heavy vinyl tubing As expected 05 ran little rpm variation regardless position held experimental unit Pointing straight up engine performed same did pointing downward though fuel tank foot aft engine because throttle assembly practically touching tank front Major positional changes power package mockup made no noticeable difference fuel draw capability What didnt expect despite unusual length its intake passageway made cold starts bit trick 05 gained bit performance turned faster 11-inch intake extension did its stock configuration long intake passage stabilized flow fuel/oil/air mixture ~Tawi -u mri NTiNiif rA UNIVERSAL! crystals $9 95 us Shipping MODEL Z800 PROVEN DESIGN MADE IN USA MICROCHIP DESIGN FEATURES FM TRANSMItTER INTERCHANGEABLE same receiver works popular FM transmitters FM SERVO INTERCHANGEABLE 4-pin connectors fit Atrtronics Futaba J JR Hitec 5 DAD servo plugs SAFETY-LOCKED CONTROL FRAMING Digital processor locks Tx control frames faultless servo positioning Made USA Specifications 3 L x 1 25 W x 625H 0 8 Oz WI ABS plastic case Sensitivity 4 micro volts 2 miles free air range Max Voltage l2VdcCurrent Drain 25 milliamps 1999 approvedLimited Five-Year Warranty Crystal Interchangeable will honor warranties DAD receivers Master Card & Visa accepted $3 Shipping/credit card $5 Shipping/COD MICRO SYSTEM! $19800 Z400 RX ultra miniature 4-channei receiver PM performance 27Mhz FM True digitai performance affected usual OB interference Microprocesaor decoder Size 1 1/8 iong 5/8 wide 1/2 tall Weight Lesa 1 oz Z400 TX Fully synthesized ail channel operation Servo Reversing Small size dry celi Nicd power GIANTOfi GIANT scaie SCALE!Fully synthesized recerve 50channeicapbiiity Dual conversion high performance reliabiiity Universal receiver compatible FM transmitter PPM format Microprocessor decoder y optically lactated buffered servo outputs shows separate servo receiver battery No need separate liters buffers integral isolated smoke pump 1jswitch 5V @ 1 amp ZiOCO Ultimate Pf us Same fe9tures plus servo battery data egging capability 3 long 1 3/4 wide S/B tali Weight 4 oz ZEBRA DIRECT 800-733-0211-Sales 317-733-0513 FAX 317-733-0514 D R E C T 10706 De Andra Drive Zionsville IN 46077 60 Model Aviation 25 BB CL version has inlet well above turbulent air zone behind prop hubone reason outperforms classic Fox 35 explained previous column probably helped performance Im sure major benefit came engines ability draw fresh nonturbulent air experimental throttle-on-tank lashup crude Id never put anything similar flying model However can visualize neater compact arrangement probably wouldnt difficult install tuned pipe dont have time try right now let know works sure include photos way improve quality air front rotary model engine intake breathes Add extension bring inlet opening up out region behind propeller hub turbulence concentrated Farther out propeller disk slipstream flow far less turbulent especially flight efficient propeller new old-timer trend underway model engines surprises Its popularity replica K&B Infant 020s engine started /2A movement half-century ago Lud Kading K K&B designed tiny power plant 1948 substitute rubber CO2 power small sport-type Free Flight FF models glow fuels far consistent model glow plug two years old time stamped sheet-aluminum propeller came Infant lacked efficiency reasons plus rapid emergence larger powerful /2As such OK Cub 049 still available today Baby Spitfire 045 Infants popularity declined considerably 4 time-saving functions incredible tool its clevis driver 1 2 Iis open type swivel ball end driver 3 Its cup type ball link driver 4 Its captive wing bolt screwdriver MODE00¶UgNG OOAePASE 0 Copy gh 9983072248w greatplaneo corn April 1998 61 Shorter QTipTM original 1948 K&B Infant complete tank sheet aluminum prop Installation tricky reversible insert different driver configurations end allows perform multitude building tasks just tool combining several ddvers youll reduce clulter workbench field box reversible snap-on handle sets 4-in-i Installation Tool apart others providing two comfortable gop options convenient storage allowing use hard-to-reach places o can use handle Aero & Marine Engines Rebuilt Repaired ted K&B can make engine like new again need send us K&B engine will repaired original parts Labor charge $750 $1250 520-453-3579 0LakeCollege Drve Hovasu City AZ 86403 NOSE Some engine boy serviceoble doe oge orcond eose GaS before Se ingin yotn engine location dealer nearest please call 1 -800-682-1948 ned mention code somber 0420C F rol\/Iag Aircraft Mag Wheels CNC machined aerospace-grade aluminum barstock Nylon bushings friction-free running long wear Radiused corners high-stress areas Fivespoke mag wheel functional good looks Exclusive RIBLOCK Tire Retention System maximum holding power Recessed center hub keep wheel collar inside rim Hub length sized fit 5/32 axles including LiteFDghts Aluminum C-Clip Axles Orable lightweight flat-spot resistant foam tires th ground -ment foam fires nylon usiiiiis readily available VISA Master Card welcome Dealer inquiries invited call write Precision Model Products 14423 Hix St. Livonia Michigan 48154313 464-8594 SKYWATCH 3D Omni-directional Solar Powered Comes Protective Cap About seven years ago Ed Seay pronounced see obtained remaining parts Infant two other K&B /2A engines 1950s 035 Torp Jr Torpedo 049 MAL Hobby Shop Irving TX Ed assembled complete engines original K&B parts possible about 100and sold Infant back again Bob Langelius 32 Clinton St White Plains NY 10603 has arranged high-precision model engine manufacturer Eastern Europe reproduce worlds first production Y2A power plant makes possible todays generation modelers enjoy old-time Infant Experience Modern glow fuel according Bob Infants run well 5-10% nitromethane castor oil lubricant efficient propellers Bob recommends Graupner 5 x 2 modern CNC precision manufacturing will combine make Infant-powered models fun 50 years ago youre interested old-time model engines should join Model Engine Collectors Association MECA Its merely society museum curator typesa majority MECAs members build fly model airplanesFF CL RCpowered types engines new old benefit belonging MECA its bimonthly Swap Sheet 60-page publication filled Wanted Sale ads members 154 current issue #187 ad lists few dozens old not-so-old new FF CL RC model engines kits feature ads especially like list engine prices wont find make offer ads join MECA contact Bob McClelland 3007 Travis St West Lake LA 70669 Tel 318 4363732 Dues $25 per year Another excellent source Sale Owner model engines Jim Gerards Engine Locator Its issued bimonthly lists wide variety power plants much-more-convenient alphabetical format Engine Locator costs $20 per year Gerard Enterprises Box 229 Elm Grove WI 53122 Tel 414 786-4703 odel Aviation USA Balsa Building Board Features Pieces cut cross grain end wood grain makes up surface allows multiple cuts surface crumbling Pieces put together checker board style help resist warping Price includes S & H MI residents add 6% sales RY 3 Sizes Sorry no orders outside continental U S available 24 24x18xl36xlSxl$5400 $3400 0 [41111J1 C 734-434 8928 41AProdigycom PO Box 178Check money Milan Mi 48160order only
Edition: Model Aviation - 1998/04
Page Numbers: 59, 60, 61, 62
Edition: Model Aviation - 1998/04
Page Numbers: 59, 60, 61, 62
U Joe Wagner CUA t 15 PERFORMANCE internal combustion engine depends much oxygen its able inhale burn fuel needs plenty Air contains about 21% oxygen cubic inch fuel/oil vapor enters glow model engines inlet roughly seven cubic inches air required complete combustion Diesels gasoline-fueled engines need about 12 cubic inches air numbers normal conditions hut conditions vary considerably much time model airplanes being flown Engines lose power hot weather air less dense increasing altitude Humidity also causes power loss whenever water vapor absorbed atmosphere takes place about 1/5 its volume oxygen Moist airs density low too what makes rise form clouds high above earth low barometric pressure impending weather change lowers airs density effects well-known full-scale aviation combined number called density altitude varies local conditions can find density altitude calling local airport As write July 14 4 pm air temperature near Pittsburgh PA 830 Farenheit hygrometer no means precision instrument indicates humidity about 80% airport located 860 feet above Mean Sea Level MSL however temperature humidity high right now density altitude airport 2200 feet means planning fly somewhere afternoon Cessna 172 youd have restrict its gross weight what could safely take off airport 2200 feet above sea level standard conditions model flier density altitude 2200 feet means engine will able put out 94% power could sea level Propeller thrust wing lift will suffer similar reductions calculate power loss subtract density altitude thousands feet 36 divide answer 36 will tell percentage normal engine power output possible density altitude 2200 feet 3622 338 33836 Theres variable can reduce density air engine breathes thus lessening models engines power output turbulence Bernoullis Principle states fluids static pressure drops fluid motion Air fluid turbulent air definition frantically motion reduces its effective density might suspect models engine running air behind its whirling propeller hub becomes exceedingly turbulent spinner air what front rotary model airplane engines compelled breathe combustion record-setting Hornet McCoy Dooling Control Line CL Speed engines yesteryear gained much superior performance being able take nonturbulent combustion air well behind fast-spinning propellers Although rear rotary engine contains moving part front rotary lacks rear rotor itself added power obtained inlet location maximum-density zeroApril 1998 59 1947 McCoy 49 set Control Line Speed records gained appreciable power rear intake location throttle location theres no injuring fingers prop adjusting needlethe OS 29 runs well ever Nelson 15 Team Racing dieselone best its classgood example modern high-power rear-rotary model engine turbulence air inside fuselage makes up friction rear rotary valve disk rotates against its sealing surface did interesting experiment several years ago OS 29 Radio Control RC engine wondered what would happen engines throttle assembly located just front fuel tank instead usual location behind propeller easy try mounted engine hardwood board removed throttle assembly replaced piece aluminum tubing fastened fuel tank other end board throttle just ahead tank front connected engine air inlet throttle 11-inch length heavy vinyl tubing As expected 05 ran little rpm variation regardless position held experimental unit Pointing straight up engine performed same did pointing downward though fuel tank foot aft engine because throttle assembly practically touching tank front Major positional changes power package mockup made no noticeable difference fuel draw capability What didnt expect despite unusual length its intake passageway made cold starts bit trick 05 gained bit performance turned faster 11-inch intake extension did its stock configuration long intake passage stabilized flow fuel/oil/air mixture ~Tawi -u mri NTiNiif rA UNIVERSAL! crystals $9 95 us Shipping MODEL Z800 PROVEN DESIGN MADE IN USA MICROCHIP DESIGN FEATURES FM TRANSMItTER INTERCHANGEABLE same receiver works popular FM transmitters FM SERVO INTERCHANGEABLE 4-pin connectors fit Atrtronics Futaba J JR Hitec 5 DAD servo plugs SAFETY-LOCKED CONTROL FRAMING Digital processor locks Tx control frames faultless servo positioning Made USA Specifications 3 L x 1 25 W x 625H 0 8 Oz WI ABS plastic case Sensitivity 4 micro volts 2 miles free air range Max Voltage l2VdcCurrent Drain 25 milliamps 1999 approvedLimited Five-Year Warranty Crystal Interchangeable will honor warranties DAD receivers Master Card & Visa accepted $3 Shipping/credit card $5 Shipping/COD MICRO SYSTEM! $19800 Z400 RX ultra miniature 4-channei receiver PM performance 27Mhz FM True digitai performance affected usual OB interference Microprocesaor decoder Size 1 1/8 iong 5/8 wide 1/2 tall Weight Lesa 1 oz Z400 TX Fully synthesized ail channel operation Servo Reversing Small size dry celi Nicd power GIANTOfi GIANT scaie SCALE!Fully synthesized recerve 50channeicapbiiity Dual conversion high performance reliabiiity Universal receiver compatible FM transmitter PPM format Microprocessor decoder y optically lactated buffered servo outputs shows separate servo receiver battery No need separate liters buffers integral isolated smoke pump 1jswitch 5V @ 1 amp ZiOCO Ultimate Pf us Same fe9tures plus servo battery data egging capability 3 long 1 3/4 wide S/B tali Weight 4 oz ZEBRA DIRECT 800-733-0211-Sales 317-733-0513 FAX 317-733-0514 D R E C T 10706 De Andra Drive Zionsville IN 46077 60 Model Aviation 25 BB CL version has inlet well above turbulent air zone behind prop hubone reason outperforms classic Fox 35 explained previous column probably helped performance Im sure major benefit came engines ability draw fresh nonturbulent air experimental throttle-on-tank lashup crude Id never put anything similar flying model However can visualize neater compact arrangement probably wouldnt difficult install tuned pipe dont have time try right now let know works sure include photos way improve quality air front rotary model engine intake breathes Add extension bring inlet opening up out region behind propeller hub turbulence concentrated Farther out propeller disk slipstream flow far less turbulent especially flight efficient propeller new old-timer trend underway model engines surprises Its popularity replica K&B Infant 020s engine started /2A movement half-century ago Lud Kading K K&B designed tiny power plant 1948 substitute rubber CO2 power small sport-type Free Flight FF models glow fuels far consistent model glow plug two years old time stamped sheet-aluminum propeller came Infant lacked efficiency reasons plus rapid emergence larger powerful /2As such OK Cub 049 still available today Baby Spitfire 045 Infants popularity declined considerably 4 time-saving functions incredible tool its clevis driver 1 2 Iis open type swivel ball end driver 3 Its cup type ball link driver 4 Its captive wing bolt screwdriver MODE00¶UgNG OOAePASE 0 Copy gh 9983072248w greatplaneo corn April 1998 61 Shorter QTipTM original 1948 K&B Infant complete tank sheet aluminum prop Installation tricky reversible insert different driver configurations end allows perform multitude building tasks just tool combining several ddvers youll reduce clulter workbench field box reversible snap-on handle sets 4-in-i Installation Tool apart others providing two comfortable gop options convenient storage allowing use hard-to-reach places o can use handle Aero & Marine Engines Rebuilt Repaired ted K&B can make engine like new again need send us K&B engine will repaired original parts Labor charge $750 $1250 520-453-3579 0LakeCollege Drve Hovasu City AZ 86403 NOSE Some engine boy serviceoble doe oge orcond eose GaS before Se ingin yotn engine location dealer nearest please call 1 -800-682-1948 ned mention code somber 0420C F rol\/Iag Aircraft Mag Wheels CNC machined aerospace-grade aluminum barstock Nylon bushings friction-free running long wear Radiused corners high-stress areas Fivespoke mag wheel functional good looks Exclusive RIBLOCK Tire Retention System maximum holding power Recessed center hub keep wheel collar inside rim Hub length sized fit 5/32 axles including LiteFDghts Aluminum C-Clip Axles Orable lightweight flat-spot resistant foam tires th ground -ment foam fires nylon usiiiiis readily available VISA Master Card welcome Dealer inquiries invited call write Precision Model Products 14423 Hix St. Livonia Michigan 48154313 464-8594 SKYWATCH 3D Omni-directional Solar Powered Comes Protective Cap About seven years ago Ed Seay pronounced see obtained remaining parts Infant two other K&B /2A engines 1950s 035 Torp Jr Torpedo 049 MAL Hobby Shop Irving TX Ed assembled complete engines original K&B parts possible about 100and sold Infant back again Bob Langelius 32 Clinton St White Plains NY 10603 has arranged high-precision model engine manufacturer Eastern Europe reproduce worlds first production Y2A power plant makes possible todays generation modelers enjoy old-time Infant Experience Modern glow fuel according Bob Infants run well 5-10% nitromethane castor oil lubricant efficient propellers Bob recommends Graupner 5 x 2 modern CNC precision manufacturing will combine make Infant-powered models fun 50 years ago youre interested old-time model engines should join Model Engine Collectors Association MECA Its merely society museum curator typesa majority MECAs members build fly model airplanesFF CL RCpowered types engines new old benefit belonging MECA its bimonthly Swap Sheet 60-page publication filled Wanted Sale ads members 154 current issue #187 ad lists few dozens old not-so-old new FF CL RC model engines kits feature ads especially like list engine prices wont find make offer ads join MECA contact Bob McClelland 3007 Travis St West Lake LA 70669 Tel 318 4363732 Dues $25 per year Another excellent source Sale Owner model engines Jim Gerards Engine Locator Its issued bimonthly lists wide variety power plants much-more-convenient alphabetical format Engine Locator costs $20 per year Gerard Enterprises Box 229 Elm Grove WI 53122 Tel 414 786-4703 odel Aviation USA Balsa Building Board Features Pieces cut cross grain end wood grain makes up surface allows multiple cuts surface crumbling Pieces put together checker board style help resist warping Price includes S & H MI residents add 6% sales RY 3 Sizes Sorry no orders outside continental U S available 24 24x18xl36xlSxl$5400 $3400 0 [41111J1 C 734-434 8928 41AProdigycom PO Box 178Check money Milan Mi 48160order only
Edition: Model Aviation - 1998/04
Page Numbers: 59, 60, 61, 62
U Joe Wagner CUA t 15 PERFORMANCE internal combustion engine depends much oxygen its able inhale burn fuel needs plenty Air contains about 21% oxygen cubic inch fuel/oil vapor enters glow model engines inlet roughly seven cubic inches air required complete combustion Diesels gasoline-fueled engines need about 12 cubic inches air numbers normal conditions hut conditions vary considerably much time model airplanes being flown Engines lose power hot weather air less dense increasing altitude Humidity also causes power loss whenever water vapor absorbed atmosphere takes place about 1/5 its volume oxygen Moist airs density low too what makes rise form clouds high above earth low barometric pressure impending weather change lowers airs density effects well-known full-scale aviation combined number called density altitude varies local conditions can find density altitude calling local airport As write July 14 4 pm air temperature near Pittsburgh PA 830 Farenheit hygrometer no means precision instrument indicates humidity about 80% airport located 860 feet above Mean Sea Level MSL however temperature humidity high right now density altitude airport 2200 feet means planning fly somewhere afternoon Cessna 172 youd have restrict its gross weight what could safely take off airport 2200 feet above sea level standard conditions model flier density altitude 2200 feet means engine will able put out 94% power could sea level Propeller thrust wing lift will suffer similar reductions calculate power loss subtract density altitude thousands feet 36 divide answer 36 will tell percentage normal engine power output possible density altitude 2200 feet 3622 338 33836 Theres variable can reduce density air engine breathes thus lessening models engines power output turbulence Bernoullis Principle states fluids static pressure drops fluid motion Air fluid turbulent air definition frantically motion reduces its effective density might suspect models engine running air behind its whirling propeller hub becomes exceedingly turbulent spinner air what front rotary model airplane engines compelled breathe combustion record-setting Hornet McCoy Dooling Control Line CL Speed engines yesteryear gained much superior performance being able take nonturbulent combustion air well behind fast-spinning propellers Although rear rotary engine contains moving part front rotary lacks rear rotor itself added power obtained inlet location maximum-density zeroApril 1998 59 1947 McCoy 49 set Control Line Speed records gained appreciable power rear intake location throttle location theres no injuring fingers prop adjusting needlethe OS 29 runs well ever Nelson 15 Team Racing dieselone best its classgood example modern high-power rear-rotary model engine turbulence air inside fuselage makes up friction rear rotary valve disk rotates against its sealing surface did interesting experiment several years ago OS 29 Radio Control RC engine wondered what would happen engines throttle assembly located just front fuel tank instead usual location behind propeller easy try mounted engine hardwood board removed throttle assembly replaced piece aluminum tubing fastened fuel tank other end board throttle just ahead tank front connected engine air inlet throttle 11-inch length heavy vinyl tubing As expected 05 ran little rpm variation regardless position held experimental unit Pointing straight up engine performed same did pointing downward though fuel tank foot aft engine because throttle assembly practically touching tank front Major positional changes power package mockup made no noticeable difference fuel draw capability What didnt expect despite unusual length its intake passageway made cold starts bit trick 05 gained bit performance turned faster 11-inch intake extension did its stock configuration long intake passage stabilized flow fuel/oil/air mixture ~Tawi -u mri NTiNiif rA UNIVERSAL! crystals $9 95 us Shipping MODEL Z800 PROVEN DESIGN MADE IN USA MICROCHIP DESIGN FEATURES FM TRANSMItTER INTERCHANGEABLE same receiver works popular FM transmitters FM SERVO INTERCHANGEABLE 4-pin connectors fit Atrtronics Futaba J JR Hitec 5 DAD servo plugs SAFETY-LOCKED CONTROL FRAMING Digital processor locks Tx control frames faultless servo positioning Made USA Specifications 3 L x 1 25 W x 625H 0 8 Oz WI ABS plastic case Sensitivity 4 micro volts 2 miles free air range Max Voltage l2VdcCurrent Drain 25 milliamps 1999 approvedLimited Five-Year Warranty Crystal Interchangeable will honor warranties DAD receivers Master Card & Visa accepted $3 Shipping/credit card $5 Shipping/COD MICRO SYSTEM! $19800 Z400 RX ultra miniature 4-channei receiver PM performance 27Mhz FM True digitai performance affected usual OB interference Microprocesaor decoder Size 1 1/8 iong 5/8 wide 1/2 tall Weight Lesa 1 oz Z400 TX Fully synthesized ail channel operation Servo Reversing Small size dry celi Nicd power GIANTOfi GIANT scaie SCALE!Fully synthesized recerve 50channeicapbiiity Dual conversion high performance reliabiiity Universal receiver compatible FM transmitter PPM format Microprocessor decoder y optically lactated buffered servo outputs shows separate servo receiver battery No need separate liters buffers integral isolated smoke pump 1jswitch 5V @ 1 amp ZiOCO Ultimate Pf us Same fe9tures plus servo battery data egging capability 3 long 1 3/4 wide S/B tali Weight 4 oz ZEBRA DIRECT 800-733-0211-Sales 317-733-0513 FAX 317-733-0514 D R E C T 10706 De Andra Drive Zionsville IN 46077 60 Model Aviation 25 BB CL version has inlet well above turbulent air zone behind prop hubone reason outperforms classic Fox 35 explained previous column probably helped performance Im sure major benefit came engines ability draw fresh nonturbulent air experimental throttle-on-tank lashup crude Id never put anything similar flying model However can visualize neater compact arrangement probably wouldnt difficult install tuned pipe dont have time try right now let know works sure include photos way improve quality air front rotary model engine intake breathes Add extension bring inlet opening up out region behind propeller hub turbulence concentrated Farther out propeller disk slipstream flow far less turbulent especially flight efficient propeller new old-timer trend underway model engines surprises Its popularity replica K&B Infant 020s engine started /2A movement half-century ago Lud Kading K K&B designed tiny power plant 1948 substitute rubber CO2 power small sport-type Free Flight FF models glow fuels far consistent model glow plug two years old time stamped sheet-aluminum propeller came Infant lacked efficiency reasons plus rapid emergence larger powerful /2As such OK Cub 049 still available today Baby Spitfire 045 Infants popularity declined considerably 4 time-saving functions incredible tool its clevis driver 1 2 Iis open type swivel ball end driver 3 Its cup type ball link driver 4 Its captive wing bolt screwdriver MODE00¶UgNG OOAePASE 0 Copy gh 9983072248w greatplaneo corn April 1998 61 Shorter QTipTM original 1948 K&B Infant complete tank sheet aluminum prop Installation tricky reversible insert different driver configurations end allows perform multitude building tasks just tool combining several ddvers youll reduce clulter workbench field box reversible snap-on handle sets 4-in-i Installation Tool apart others providing two comfortable gop options convenient storage allowing use hard-to-reach places o can use handle Aero & Marine Engines Rebuilt Repaired ted K&B can make engine like new again need send us K&B engine will repaired original parts Labor charge $750 $1250 520-453-3579 0LakeCollege Drve Hovasu City AZ 86403 NOSE Some engine boy serviceoble doe oge orcond eose GaS before Se ingin yotn engine location dealer nearest please call 1 -800-682-1948 ned mention code somber 0420C F rol\/Iag Aircraft Mag Wheels CNC machined aerospace-grade aluminum barstock Nylon bushings friction-free running long wear Radiused corners high-stress areas Fivespoke mag wheel functional good looks Exclusive RIBLOCK Tire Retention System maximum holding power Recessed center hub keep wheel collar inside rim Hub length sized fit 5/32 axles including LiteFDghts Aluminum C-Clip Axles Orable lightweight flat-spot resistant foam tires th ground -ment foam fires nylon usiiiiis readily available VISA Master Card welcome Dealer inquiries invited call write Precision Model Products 14423 Hix St. Livonia Michigan 48154313 464-8594 SKYWATCH 3D Omni-directional Solar Powered Comes Protective Cap About seven years ago Ed Seay pronounced see obtained remaining parts Infant two other K&B /2A engines 1950s 035 Torp Jr Torpedo 049 MAL Hobby Shop Irving TX Ed assembled complete engines original K&B parts possible about 100and sold Infant back again Bob Langelius 32 Clinton St White Plains NY 10603 has arranged high-precision model engine manufacturer Eastern Europe reproduce worlds first production Y2A power plant makes possible todays generation modelers enjoy old-time Infant Experience Modern glow fuel according Bob Infants run well 5-10% nitromethane castor oil lubricant efficient propellers Bob recommends Graupner 5 x 2 modern CNC precision manufacturing will combine make Infant-powered models fun 50 years ago youre interested old-time model engines should join Model Engine Collectors Association MECA Its merely society museum curator typesa majority MECAs members build fly model airplanesFF CL RCpowered types engines new old benefit belonging MECA its bimonthly Swap Sheet 60-page publication filled Wanted Sale ads members 154 current issue #187 ad lists few dozens old not-so-old new FF CL RC model engines kits feature ads especially like list engine prices wont find make offer ads join MECA contact Bob McClelland 3007 Travis St West Lake LA 70669 Tel 318 4363732 Dues $25 per year Another excellent source Sale Owner model engines Jim Gerards Engine Locator Its issued bimonthly lists wide variety power plants much-more-convenient alphabetical format Engine Locator costs $20 per year Gerard Enterprises Box 229 Elm Grove WI 53122 Tel 414 786-4703 odel Aviation USA Balsa Building Board Features Pieces cut cross grain end wood grain makes up surface allows multiple cuts surface crumbling Pieces put together checker board style help resist warping Price includes S & H MI residents add 6% sales RY 3 Sizes Sorry no orders outside continental U S available 24 24x18xl36xlSxl$5400 $3400 0 [41111J1 C 734-434 8928 41AProdigycom PO Box 178Check money Milan Mi 48160order only
Edition: Model Aviation - 1998/04
Page Numbers: 59, 60, 61, 62
U Joe Wagner CUA t 15 PERFORMANCE internal combustion engine depends much oxygen its able inhale burn fuel needs plenty Air contains about 21% oxygen cubic inch fuel/oil vapor enters glow model engines inlet roughly seven cubic inches air required complete combustion Diesels gasoline-fueled engines need about 12 cubic inches air numbers normal conditions hut conditions vary considerably much time model airplanes being flown Engines lose power hot weather air less dense increasing altitude Humidity also causes power loss whenever water vapor absorbed atmosphere takes place about 1/5 its volume oxygen Moist airs density low too what makes rise form clouds high above earth low barometric pressure impending weather change lowers airs density effects well-known full-scale aviation combined number called density altitude varies local conditions can find density altitude calling local airport As write July 14 4 pm air temperature near Pittsburgh PA 830 Farenheit hygrometer no means precision instrument indicates humidity about 80% airport located 860 feet above Mean Sea Level MSL however temperature humidity high right now density altitude airport 2200 feet means planning fly somewhere afternoon Cessna 172 youd have restrict its gross weight what could safely take off airport 2200 feet above sea level standard conditions model flier density altitude 2200 feet means engine will able put out 94% power could sea level Propeller thrust wing lift will suffer similar reductions calculate power loss subtract density altitude thousands feet 36 divide answer 36 will tell percentage normal engine power output possible density altitude 2200 feet 3622 338 33836 Theres variable can reduce density air engine breathes thus lessening models engines power output turbulence Bernoullis Principle states fluids static pressure drops fluid motion Air fluid turbulent air definition frantically motion reduces its effective density might suspect models engine running air behind its whirling propeller hub becomes exceedingly turbulent spinner air what front rotary model airplane engines compelled breathe combustion record-setting Hornet McCoy Dooling Control Line CL Speed engines yesteryear gained much superior performance being able take nonturbulent combustion air well behind fast-spinning propellers Although rear rotary engine contains moving part front rotary lacks rear rotor itself added power obtained inlet location maximum-density zeroApril 1998 59 1947 McCoy 49 set Control Line Speed records gained appreciable power rear intake location throttle location theres no injuring fingers prop adjusting needlethe OS 29 runs well ever Nelson 15 Team Racing dieselone best its classgood example modern high-power rear-rotary model engine turbulence air inside fuselage makes up friction rear rotary valve disk rotates against its sealing surface did interesting experiment several years ago OS 29 Radio Control RC engine wondered what would happen engines throttle assembly located just front fuel tank instead usual location behind propeller easy try mounted engine hardwood board removed throttle assembly replaced piece aluminum tubing fastened fuel tank other end board throttle just ahead tank front connected engine air inlet throttle 11-inch length heavy vinyl tubing As expected 05 ran little rpm variation regardless position held experimental unit Pointing straight up engine performed same did pointing downward though fuel tank foot aft engine because throttle assembly practically touching tank front Major positional changes power package mockup made no noticeable difference fuel draw capability What didnt expect despite unusual length its intake passageway made cold starts bit trick 05 gained bit performance turned faster 11-inch intake extension did its stock configuration long intake passage stabilized flow fuel/oil/air mixture ~Tawi -u mri NTiNiif rA UNIVERSAL! crystals $9 95 us Shipping MODEL Z800 PROVEN DESIGN MADE IN USA MICROCHIP DESIGN FEATURES FM TRANSMItTER INTERCHANGEABLE same receiver works popular FM transmitters FM SERVO INTERCHANGEABLE 4-pin connectors fit Atrtronics Futaba J JR Hitec 5 DAD servo plugs SAFETY-LOCKED CONTROL FRAMING Digital processor locks Tx control frames faultless servo positioning Made USA Specifications 3 L x 1 25 W x 625H 0 8 Oz WI ABS plastic case Sensitivity 4 micro volts 2 miles free air range Max Voltage l2VdcCurrent Drain 25 milliamps 1999 approvedLimited Five-Year Warranty Crystal Interchangeable will honor warranties DAD receivers Master Card & Visa accepted $3 Shipping/credit card $5 Shipping/COD MICRO SYSTEM! $19800 Z400 RX ultra miniature 4-channei receiver PM performance 27Mhz FM True digitai performance affected usual OB interference Microprocesaor decoder Size 1 1/8 iong 5/8 wide 1/2 tall Weight Lesa 1 oz Z400 TX Fully synthesized ail channel operation Servo Reversing Small size dry celi Nicd power GIANTOfi GIANT scaie SCALE!Fully synthesized recerve 50channeicapbiiity Dual conversion high performance reliabiiity Universal receiver compatible FM transmitter PPM format Microprocessor decoder y optically lactated buffered servo outputs shows separate servo receiver battery No need separate liters buffers integral isolated smoke pump 1jswitch 5V @ 1 amp ZiOCO Ultimate Pf us Same fe9tures plus servo battery data egging capability 3 long 1 3/4 wide S/B tali Weight 4 oz ZEBRA DIRECT 800-733-0211-Sales 317-733-0513 FAX 317-733-0514 D R E C T 10706 De Andra Drive Zionsville IN 46077 60 Model Aviation 25 BB CL version has inlet well above turbulent air zone behind prop hubone reason outperforms classic Fox 35 explained previous column probably helped performance Im sure major benefit came engines ability draw fresh nonturbulent air experimental throttle-on-tank lashup crude Id never put anything similar flying model However can visualize neater compact arrangement probably wouldnt difficult install tuned pipe dont have time try right now let know works sure include photos way improve quality air front rotary model engine intake breathes Add extension bring inlet opening up out region behind propeller hub turbulence concentrated Farther out propeller disk slipstream flow far less turbulent especially flight efficient propeller new old-timer trend underway model engines surprises Its popularity replica K&B Infant 020s engine started /2A movement half-century ago Lud Kading K K&B designed tiny power plant 1948 substitute rubber CO2 power small sport-type Free Flight FF models glow fuels far consistent model glow plug two years old time stamped sheet-aluminum propeller came Infant lacked efficiency reasons plus rapid emergence larger powerful /2As such OK Cub 049 still available today Baby Spitfire 045 Infants popularity declined considerably 4 time-saving functions incredible tool its clevis driver 1 2 Iis open type swivel ball end driver 3 Its cup type ball link driver 4 Its captive wing bolt screwdriver MODE00¶UgNG OOAePASE 0 Copy gh 9983072248w greatplaneo corn April 1998 61 Shorter QTipTM original 1948 K&B Infant complete tank sheet aluminum prop Installation tricky reversible insert different driver configurations end allows perform multitude building tasks just tool combining several ddvers youll reduce clulter workbench field box reversible snap-on handle sets 4-in-i Installation Tool apart others providing two comfortable gop options convenient storage allowing use hard-to-reach places o can use handle Aero & Marine Engines Rebuilt Repaired ted K&B can make engine like new again need send us K&B engine will repaired original parts Labor charge $750 $1250 520-453-3579 0LakeCollege Drve Hovasu City AZ 86403 NOSE Some engine boy serviceoble doe oge orcond eose GaS before Se ingin yotn engine location dealer nearest please call 1 -800-682-1948 ned mention code somber 0420C F rol\/Iag Aircraft Mag Wheels CNC machined aerospace-grade aluminum barstock Nylon bushings friction-free running long wear Radiused corners high-stress areas Fivespoke mag wheel functional good looks Exclusive RIBLOCK Tire Retention System maximum holding power Recessed center hub keep wheel collar inside rim Hub length sized fit 5/32 axles including LiteFDghts Aluminum C-Clip Axles Orable lightweight flat-spot resistant foam tires th ground -ment foam fires nylon usiiiiis readily available VISA Master Card welcome Dealer inquiries invited call write Precision Model Products 14423 Hix St. Livonia Michigan 48154313 464-8594 SKYWATCH 3D Omni-directional Solar Powered Comes Protective Cap About seven years ago Ed Seay pronounced see obtained remaining parts Infant two other K&B /2A engines 1950s 035 Torp Jr Torpedo 049 MAL Hobby Shop Irving TX Ed assembled complete engines original K&B parts possible about 100and sold Infant back again Bob Langelius 32 Clinton St White Plains NY 10603 has arranged high-precision model engine manufacturer Eastern Europe reproduce worlds first production Y2A power plant makes possible todays generation modelers enjoy old-time Infant Experience Modern glow fuel according Bob Infants run well 5-10% nitromethane castor oil lubricant efficient propellers Bob recommends Graupner 5 x 2 modern CNC precision manufacturing will combine make Infant-powered models fun 50 years ago youre interested old-time model engines should join Model Engine Collectors Association MECA Its merely society museum curator typesa majority MECAs members build fly model airplanesFF CL RCpowered types engines new old benefit belonging MECA its bimonthly Swap Sheet 60-page publication filled Wanted Sale ads members 154 current issue #187 ad lists few dozens old not-so-old new FF CL RC model engines kits feature ads especially like list engine prices wont find make offer ads join MECA contact Bob McClelland 3007 Travis St West Lake LA 70669 Tel 318 4363732 Dues $25 per year Another excellent source Sale Owner model engines Jim Gerards Engine Locator Its issued bimonthly lists wide variety power plants 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