U Joe Wagner WL7x / z7ciz Lx4p THERE ARE THREE Joe Wagners have become well-known model-airplane game top-level rubber-power competitor living California another New Englander perhaps best known attempt some years ago manufacture replicas post-WW II Bantam 19 Morton M-5 spark ignition engines Im Joe Wagner Chief Engineer Veco 1950s organized Model Engine Collectors Association MECA around 1960 wrote ModelAirplane News engine column almost ten years Now Im Model Aviation what can help new column about kinds model airplane engines except Electric motors rocket power gas turbines pulse jets Well talk about glow spark ignition diesels modem engines oldtimers two-strokes four-strokes Free Eight engines Control Line engines RC power plants CO2 compressed-air motors Thats lot interesting territory cover 60 years foozling about model airplane engines Ive built several contest-winning record-setting FF CL competition engines other fliers though gung-ho trophy seekers like AMA members Im fly-for-the-fun-of-it modeler want personal engines friendly reliable performers last long time hauling airplanes merrily though sky much prefer good manners ultimate shriekability interests similar let know let know too can adjust output good plan tell can about get maximum enjoyment satisfaction model engines Ill also try root out false beliefs misunderstandings about plenty mistaken notions floating around Heres Model engine propellers always require careful exact balancing minimize vibration power loss Sometimes single-cylinder engine will run noticeably faster smoother unbalanced prop Heres Its engineering impossibility dynamically balance singlecylinder engine True can make its crankshaft counterbalance heavy enough statically balance piston rod wristpin engine running vibrates just viciously side side would have vertical direction counterbalance Model engine designers mosfly work cut-and-try methods 78 Model Aviation rn reproductions Ben Shereshaws 1938 Bantam 16 spark-ignitionDual-ball-bearing MK-17 nearly vibration-free engine look run far better originalsdespite having no crankshaft counterbalance PAW 03 RIC standard-size Tygon fuel tubing Fat fuel Dual-ball-bearing Aviant 061 left includes prop brake floodoff tubing tiny engine makes steady running port case pressure tap AME 049 right Ten-inch prop Veco 19 same diameter fliers put 40s Pulls profile Stunt model through whole pattern decide much counterbalancing use crankshafts Some engines run incredibly smoothly no counterbalancing such modem Russian-made MK-17 09 diesel Others have extra counterbalance weights installed such lead slug dummy rear rotor K&Bs 1959 Torpedo 45 RC Since 1932 careful gas model fliers have always balanced propellers before using few years ago Don Garry Cocoa FL proved better smoother model engine performance can sometimes come purposely out-of-balance prop trick install prop its heavier blade directly opposite engines piston way acts added extemal counterbalance much imbalance best Theres no practical way predict Trial-and-error way go depends prop size material displacement design speed engine way its mounted airplane Im advising always use out-of-balance prop nor am suggesting throw away propeller-balancing equipment Im saying perfect balance isnt vital model airplane prop always believed since Don Garry opened eyes topic Ive quit spending time meticulously hand-balancing propellers install new prop put loose-fitting screwdriver blade through its center hole see closely prop balances blade tad heavy install opposite engines piston tighten nut go fly couple paragraphs back mentioned Russian-made model diesel engine Lately several model engines former USSR have appeared US hobby market Most made Ukraine Some replicas pre-WW II American spark-ignition types such 1938 Bantam 16 being imported Classic Old Time Engines 15731 Five Point Rd Penysburg OH 43551 Other Ukrainian engines state-of-the-art competition types such new competition Free Right Aviant 061 reliable source told thats made division famous Antonov aircraft company Kiev Unusual Thats about same Boeing model airplane engine subsidiary engines limited-production types consequently expensive Ukrainian-made AME BIGMIG engines imported NORVEL 2244 East Enterprise Twinsburg OH 44087 just well-made yet far less costly AMEs available 049 061 displacement RC unthrottled versions high-revving competition engines require pressurized fuel supply pressure available clip-on July1997 79 5uper CoveriteTM Fabric eastj use dont worrg nobodg ha know Some people believe achieving authentic looks vintage scale planes has difficult Coverite replies Nonsense Consider Super Coverite looks like cloth Flows around compound curves like cloth feels like cloth isnt surprising Super Coverite cloth tough woven polyester cloth Seal quick coat dope paint trimand remains fuelproofing handsome hard-wearing finish practically begs bragged about SUPER COVERITE fact irons includes strong fuelproof adhesive layer doesnt take thing away its mellow good looksjust time needed apply true look past less time try Super Coverite Available White Antique 38 x 45 sheets 45 x 15 rolls location dealer nearest please call 1-800-682-8948 mention code number 041 SY Distributed Exclusively Through GREAT PLANES MODEL DISTRIBUTORS PC Box 9021 Champaign IL 61 826-9021 80 Model Aviation ler comes engines isnt nearly enough reliable fuel deliveryespecially starting However importer has pressurized fuel supply systems available AME BIGMIIG havent seen yet sport-type BIGMIG though looks very much like its older brother AME friendlier engine far own AME havent flown anything yet because seldom use competition engines model flying old friend Randy Randolph prefers same style RC flight hes having fun galore BIGMIG 061 RC Randy tells BIGMIG requires break-in period just like lapped-cast-iron-piston model engine says throttle works smoothly 5000 20000 rpm although fuel tank location little fussy didnt have much trouble fuel feed Randy thinks muffler pressure would help rather doubt clip-on muffler its bit trick figure out put has no gasket spring doesnt seem hold muffler particularly tightly against exhaust port boss Thats feel pressure available BIGMIG muffler tap youd have install yourself wouldnt amount much leads refuting another old misunderstanding ones about fuel feed engines seems logical because engines such famous Cox Tee Dee line tiny fuel lines should also small made mistake myself years before seeing light fact because VIA engines small amount fuel-delivery suction can induce needle valves minimal So should using largest-sized fuel tubing can install little engines cut down resistance fuel flow thus reduce its variability fact doesnt hurt employ big fuel tubing model engine Anything can reduce work takes get fuel out tank combustion chamber can oaly help Randy Randolphs reported results BIGMIG 061 RC bring up another interesting point Hes flying engine semiscale airplane 188-square-inch symmetricalBacked service training videos free technical hotline Si -8OO-35-O32 Askfo opeao MA77 o w eDepMA77 POBaxl5l7 SrfIUiY AenArbo M 48 061517 THE REST IN SCALE BRIAN TAYLOR PLANS Brian Taylor Englands best scale designers ke some US olan services Brian builds flies models designs Brian won 1st UK Nats Spit 1974 has wins last 20 s Brian has flown UK World scale team times has always did well Brian Mick Jim Reeves Will 1996 UK World Scale team POWER LASER 150 142 LBS Plan $4500 pp rolledNEW 82 F4U-1 Corsair Accessory set- fg cowl wing crank Ie moaldingsI canopy & spinner $9000 Retracts available LASER CUT PARTS ARE NOW AvAILABLE PRICE 56500 TOTAL OP $1000 POSTAGE linese Corsair size east 26 Other Brian Taylor plans available Did notice model looks like real picture model Visa Master card 01K BEST IN SCALE CATALOG $700 pos7 cola LA3LKLUI 51111 non HOLMAN PLANS PO Box 748 SAN BERNARDINO CA 92402 909 885 3959 FAX 909 889 9307 Sky Harbor RC Presents Mike Del Pontes Reviution V-Tail Q-500 Specifically designed Nelson Jett 0-500 Motors Pilots choice NATs four years running Holds numerous 0-500 Pylon records Standard equipment top pilots like Chip Hyde Richard Verano Mike Parker & Tony Lopez Hand crafted custom built ARF Light weight pre-built fuselage piece sheeted wing epoxy carbon fiber reinforcing hand select weigh piece balsa ensure 35 lbs airplane Aluminum back plate motor mount Nelson & Jeff motors well other racing items available Predictabli racing plane yet stable docile sport plane Proven race winning building set up details included airfoil wing model weighs 20 ounces Randy tried flying 6 x 3 prop turned 15000 rpm max anda5x 31 @ 20000 rpm found airplane performed considerably snappier small high-revving propeller results intrigued because prefer swinging big prop low rpm keeps bothersome noise pitch down often fly schoolyards Ive found higher efficiency large prop compensates power loss lower rpm Thats did engineering analysis Randys resultsand learned something Using rpm propeller dimensions variables found expected gross power output prop about same both 5-incher 20000 sixinch prop 15000 So did Randys model fly better small prop Propeller pitch Its useful rule thumb speed model miles per hour can roughly calcalated multiplying prop pitch inches its rpm thousands So 5 x 3 prop airplanes approximate maximum speed would 35 x 20 70mph 6 x 3 prop couldnt go faster 3 x 15 about 45 mph Thats what made difference small symmetrical-airfoil wing Randys airplane has fly pretty fast respond well control input performs better 5-inch prop because its flying faster True both engine/prop combinations produce nearly same usable power flatter-pitch prop wastes some power because theres no way can pull airplane faster about 45 mpheven dive prop acts like airbrake past its 45-mph limit use speed-limiting characteristic good effect CL Stunt models flat-pitch large-diameter prop say lOx 4 19 helps lot Stunt maneuvering because acts keep airplanes speed constant Climbing diving flying level four-inch-pitch prop 12000 rpm maintains models speed right around 48 mph makes controls work same throughout flight Thats big help guy gets little chance practice odel Aviation Sc 60 size uuu 2ize desigrinu iui risisuri & jee ize nes gnee rer cx xi no 140 ores r Canepy plus AOS cowl Scoop Exhaust tuild Kiter ARE Kit ges Relied Place ls Available Stable Racing/Sport Place e Warbird Racing association Coampion Flame 40 Sloe Sport ter Nelsen & Jet build & Fly cycle Radio 3-Channel B & M MODEL CO 290 W 1050 N LAYTON UT 84041 -445689 Call Send $300 Color Brochure models $000 Color Pamphlet Miss America Only UT REO ADO 625% TAX
Edition: Model Aviation - 1997/07
Page Numbers: 78, 79, 80, 82
Edition: Model Aviation - 1997/07
Page Numbers: 78, 79, 80, 82
U Joe Wagner WL7x / z7ciz Lx4p THERE ARE THREE Joe Wagners have become well-known model-airplane game top-level rubber-power competitor living California another New Englander perhaps best known attempt some years ago manufacture replicas post-WW II Bantam 19 Morton M-5 spark ignition engines Im Joe Wagner Chief Engineer Veco 1950s organized Model Engine Collectors Association MECA around 1960 wrote ModelAirplane News engine column almost ten years Now Im Model Aviation what can help new column about kinds model airplane engines except Electric motors rocket power gas turbines pulse jets Well talk about glow spark ignition diesels modem engines oldtimers two-strokes four-strokes Free Eight engines Control Line engines RC power plants CO2 compressed-air motors Thats lot interesting territory cover 60 years foozling about model airplane engines Ive built several contest-winning record-setting FF CL competition engines other fliers though gung-ho trophy seekers like AMA members Im fly-for-the-fun-of-it modeler want personal engines friendly reliable performers last long time hauling airplanes merrily though sky much prefer good manners ultimate shriekability interests similar let know let know too can adjust output good plan tell can about get maximum enjoyment satisfaction model engines Ill also try root out false beliefs misunderstandings about plenty mistaken notions floating around Heres Model engine propellers always require careful exact balancing minimize vibration power loss Sometimes single-cylinder engine will run noticeably faster smoother unbalanced prop Heres Its engineering impossibility dynamically balance singlecylinder engine True can make its crankshaft counterbalance heavy enough statically balance piston rod wristpin engine running vibrates just viciously side side would have vertical direction counterbalance Model engine designers mosfly work cut-and-try methods 78 Model Aviation rn reproductions Ben Shereshaws 1938 Bantam 16 spark-ignitionDual-ball-bearing MK-17 nearly vibration-free engine look run far better originalsdespite having no crankshaft counterbalance PAW 03 RIC standard-size Tygon fuel tubing Fat fuel Dual-ball-bearing Aviant 061 left includes prop brake floodoff tubing tiny engine makes steady running port case pressure tap AME 049 right Ten-inch prop Veco 19 same diameter fliers put 40s Pulls profile Stunt model through whole pattern decide much counterbalancing use crankshafts Some engines run incredibly smoothly no counterbalancing such modem Russian-made MK-17 09 diesel Others have extra counterbalance weights installed such lead slug dummy rear rotor K&Bs 1959 Torpedo 45 RC Since 1932 careful gas model fliers have always balanced propellers before using few years ago Don Garry Cocoa FL proved better smoother model engine performance can sometimes come purposely out-of-balance prop trick install prop its heavier blade directly opposite engines piston way acts added extemal counterbalance much imbalance best Theres no practical way predict Trial-and-error way go depends prop size material displacement design speed engine way its mounted airplane Im advising always use out-of-balance prop nor am suggesting throw away propeller-balancing equipment Im saying perfect balance isnt vital model airplane prop always believed since Don Garry opened eyes topic Ive quit spending time meticulously hand-balancing propellers install new prop put loose-fitting screwdriver blade through its center hole see closely prop balances blade tad heavy install opposite engines piston tighten nut go fly couple paragraphs back mentioned Russian-made model diesel engine Lately several model engines former USSR have appeared US hobby market Most made Ukraine Some replicas pre-WW II American spark-ignition types such 1938 Bantam 16 being imported Classic Old Time Engines 15731 Five Point Rd Penysburg OH 43551 Other Ukrainian engines state-of-the-art competition types such new competition Free Right Aviant 061 reliable source told thats made division famous Antonov aircraft company Kiev Unusual Thats about same Boeing model airplane engine subsidiary engines limited-production types consequently expensive Ukrainian-made AME BIGMIG engines imported NORVEL 2244 East Enterprise Twinsburg OH 44087 just well-made yet far less costly AMEs available 049 061 displacement RC unthrottled versions high-revving competition engines require pressurized fuel supply pressure available clip-on July1997 79 5uper CoveriteTM Fabric eastj use dont worrg nobodg ha know Some people believe achieving authentic looks vintage scale planes has difficult Coverite replies Nonsense Consider Super Coverite looks like cloth Flows around compound curves like cloth feels like cloth isnt surprising Super Coverite cloth tough woven polyester cloth Seal quick coat dope paint trimand remains fuelproofing handsome hard-wearing finish practically begs bragged about SUPER COVERITE fact irons includes strong fuelproof adhesive layer doesnt take thing away its mellow good looksjust time needed apply true look past less time try Super Coverite Available White Antique 38 x 45 sheets 45 x 15 rolls location dealer nearest please call 1-800-682-8948 mention code number 041 SY Distributed Exclusively Through GREAT PLANES MODEL DISTRIBUTORS PC Box 9021 Champaign IL 61 826-9021 80 Model Aviation ler comes engines isnt nearly enough reliable fuel deliveryespecially starting However importer has pressurized fuel supply systems available AME BIGMIIG havent seen yet sport-type BIGMIG though looks very much like its older brother AME friendlier engine far own AME havent flown anything yet because seldom use competition engines model flying old friend Randy Randolph prefers same style RC flight hes having fun galore BIGMIG 061 RC Randy tells BIGMIG requires break-in period just like lapped-cast-iron-piston model engine says throttle works smoothly 5000 20000 rpm although fuel tank location little fussy didnt have much trouble fuel feed Randy thinks muffler pressure would help rather doubt clip-on muffler its bit trick figure out put has no gasket spring doesnt seem hold muffler particularly tightly against exhaust port boss Thats feel pressure available BIGMIG muffler tap youd have install yourself wouldnt amount much leads refuting another old misunderstanding ones about fuel feed engines seems logical because engines such famous Cox Tee Dee line tiny fuel lines should also small made mistake myself years before seeing light fact because VIA engines small amount fuel-delivery suction can induce needle valves minimal So should using largest-sized fuel tubing can install little engines cut down resistance fuel flow thus reduce its variability fact doesnt hurt employ big fuel tubing model engine Anything can reduce work takes get fuel out tank combustion chamber can oaly help Randy Randolphs reported results BIGMIG 061 RC bring up another interesting point Hes flying engine semiscale airplane 188-square-inch symmetricalBacked service training videos free technical hotline Si -8OO-35-O32 Askfo opeao MA77 o w eDepMA77 POBaxl5l7 SrfIUiY AenArbo M 48 061517 THE REST IN SCALE BRIAN TAYLOR PLANS Brian Taylor Englands best scale designers ke some US olan services Brian builds flies models designs Brian won 1st UK Nats Spit 1974 has wins last 20 s Brian has flown UK World scale team times has always did well Brian Mick Jim Reeves Will 1996 UK World Scale team POWER LASER 150 142 LBS Plan $4500 pp rolledNEW 82 F4U-1 Corsair Accessory set- fg cowl wing crank Ie moaldingsI canopy & spinner $9000 Retracts available LASER CUT PARTS ARE NOW AvAILABLE PRICE 56500 TOTAL OP $1000 POSTAGE linese Corsair size east 26 Other Brian Taylor plans available Did notice model looks like real picture model Visa Master card 01K BEST IN SCALE CATALOG $700 pos7 cola LA3LKLUI 51111 non HOLMAN PLANS PO Box 748 SAN BERNARDINO CA 92402 909 885 3959 FAX 909 889 9307 Sky Harbor RC Presents Mike Del Pontes Reviution V-Tail Q-500 Specifically designed Nelson Jett 0-500 Motors Pilots choice NATs four years running Holds numerous 0-500 Pylon records Standard equipment top pilots like Chip Hyde Richard Verano Mike Parker & Tony Lopez Hand crafted custom built ARF Light weight pre-built fuselage piece sheeted wing epoxy carbon fiber reinforcing hand select weigh piece balsa ensure 35 lbs airplane Aluminum back plate motor mount Nelson & Jeff motors well other racing items available Predictabli racing plane yet stable docile sport plane Proven race winning building set up details included airfoil wing model weighs 20 ounces Randy tried flying 6 x 3 prop turned 15000 rpm max anda5x 31 @ 20000 rpm found airplane performed considerably snappier small high-revving propeller results intrigued because prefer swinging big prop low rpm keeps bothersome noise pitch down often fly schoolyards Ive found higher efficiency large prop compensates power loss lower rpm Thats did engineering analysis Randys resultsand learned something Using rpm propeller dimensions variables found expected gross power output prop about same both 5-incher 20000 sixinch prop 15000 So did Randys model fly better small prop Propeller pitch Its useful rule thumb speed model miles per hour can roughly calcalated multiplying prop pitch inches its rpm thousands So 5 x 3 prop airplanes approximate maximum speed would 35 x 20 70mph 6 x 3 prop couldnt go faster 3 x 15 about 45 mph Thats what made difference small symmetrical-airfoil wing Randys airplane has fly pretty fast respond well control input performs better 5-inch prop because its flying faster True both engine/prop combinations produce nearly same usable power flatter-pitch prop wastes some power because theres no way can pull airplane faster about 45 mpheven dive prop acts like airbrake past its 45-mph limit use speed-limiting characteristic good effect CL Stunt models flat-pitch large-diameter prop say lOx 4 19 helps lot Stunt maneuvering because acts keep airplanes speed constant Climbing diving flying level four-inch-pitch prop 12000 rpm maintains models speed right around 48 mph makes controls work same throughout flight Thats big help guy gets little chance practice odel Aviation Sc 60 size uuu 2ize desigrinu iui risisuri & jee ize nes gnee rer cx xi no 140 ores r Canepy plus AOS cowl Scoop Exhaust tuild Kiter ARE Kit ges Relied Place ls Available Stable Racing/Sport Place e Warbird Racing association Coampion Flame 40 Sloe Sport ter Nelsen & Jet build & Fly cycle Radio 3-Channel B & M MODEL CO 290 W 1050 N LAYTON UT 84041 -445689 Call Send $300 Color Brochure models $000 Color Pamphlet Miss America Only UT REO ADO 625% TAX
Edition: Model Aviation - 1997/07
Page Numbers: 78, 79, 80, 82
U Joe Wagner WL7x / z7ciz Lx4p THERE ARE THREE Joe Wagners have become well-known model-airplane game top-level rubber-power competitor living California another New Englander perhaps best known attempt some years ago manufacture replicas post-WW II Bantam 19 Morton M-5 spark ignition engines Im Joe Wagner Chief Engineer Veco 1950s organized Model Engine Collectors Association MECA around 1960 wrote ModelAirplane News engine column almost ten years Now Im Model Aviation what can help new column about kinds model airplane engines except Electric motors rocket power gas turbines pulse jets Well talk about glow spark ignition diesels modem engines oldtimers two-strokes four-strokes Free Eight engines Control Line engines RC power plants CO2 compressed-air motors Thats lot interesting territory cover 60 years foozling about model airplane engines Ive built several contest-winning record-setting FF CL competition engines other fliers though gung-ho trophy seekers like AMA members Im fly-for-the-fun-of-it modeler want personal engines friendly reliable performers last long time hauling airplanes merrily though sky much prefer good manners ultimate shriekability interests similar let know let know too can adjust output good plan tell can about get maximum enjoyment satisfaction model engines Ill also try root out false beliefs misunderstandings about plenty mistaken notions floating around Heres Model engine propellers always require careful exact balancing minimize vibration power loss Sometimes single-cylinder engine will run noticeably faster smoother unbalanced prop Heres Its engineering impossibility dynamically balance singlecylinder engine True can make its crankshaft counterbalance heavy enough statically balance piston rod wristpin engine running vibrates just viciously side side would have vertical direction counterbalance Model engine designers mosfly work cut-and-try methods 78 Model Aviation rn reproductions Ben Shereshaws 1938 Bantam 16 spark-ignitionDual-ball-bearing MK-17 nearly vibration-free engine look run far better originalsdespite having no crankshaft counterbalance PAW 03 RIC standard-size Tygon fuel tubing Fat fuel Dual-ball-bearing Aviant 061 left includes prop brake floodoff tubing tiny engine makes steady running port case pressure tap AME 049 right Ten-inch prop Veco 19 same diameter fliers put 40s Pulls profile Stunt model through whole pattern decide much counterbalancing use crankshafts Some engines run incredibly smoothly no counterbalancing such modem Russian-made MK-17 09 diesel Others have extra counterbalance weights installed such lead slug dummy rear rotor K&Bs 1959 Torpedo 45 RC Since 1932 careful gas model fliers have always balanced propellers before using few years ago Don Garry Cocoa FL proved better smoother model engine performance can sometimes come purposely out-of-balance prop trick install prop its heavier blade directly opposite engines piston way acts added extemal counterbalance much imbalance best Theres no practical way predict Trial-and-error way go depends prop size material displacement design speed engine way its mounted airplane Im advising always use out-of-balance prop nor am suggesting throw away propeller-balancing equipment Im saying perfect balance isnt vital model airplane prop always believed since Don Garry opened eyes topic Ive quit spending time meticulously hand-balancing propellers install new prop put loose-fitting screwdriver blade through its center hole see closely prop balances blade tad heavy install opposite engines piston tighten nut go fly couple paragraphs back mentioned Russian-made model diesel engine Lately several model engines former USSR have appeared US hobby market Most made Ukraine Some replicas pre-WW II American spark-ignition types such 1938 Bantam 16 being imported Classic Old Time Engines 15731 Five Point Rd Penysburg OH 43551 Other Ukrainian engines state-of-the-art competition types such new competition Free Right Aviant 061 reliable source told thats made division famous Antonov aircraft company Kiev Unusual Thats about same Boeing model airplane engine subsidiary engines limited-production types consequently expensive Ukrainian-made AME BIGMIG engines imported NORVEL 2244 East Enterprise Twinsburg OH 44087 just well-made yet far less costly AMEs available 049 061 displacement RC unthrottled versions high-revving competition engines require pressurized fuel supply pressure available clip-on July1997 79 5uper CoveriteTM Fabric eastj use dont worrg nobodg ha know Some people believe achieving authentic looks vintage scale planes has difficult Coverite replies Nonsense Consider Super Coverite looks like cloth Flows around compound curves like cloth feels like cloth isnt surprising Super Coverite cloth tough woven polyester cloth Seal quick coat dope paint trimand remains fuelproofing handsome hard-wearing finish practically begs bragged about SUPER COVERITE fact irons includes strong fuelproof adhesive layer doesnt take thing away its mellow good looksjust time needed apply true look past less time try Super Coverite Available White Antique 38 x 45 sheets 45 x 15 rolls location dealer nearest please call 1-800-682-8948 mention code number 041 SY Distributed Exclusively Through GREAT PLANES MODEL DISTRIBUTORS PC Box 9021 Champaign IL 61 826-9021 80 Model Aviation ler comes engines isnt nearly enough reliable fuel deliveryespecially starting However importer has pressurized fuel supply systems available AME BIGMIIG havent seen yet sport-type BIGMIG though looks very much like its older brother AME friendlier engine far own AME havent flown anything yet because seldom use competition engines model flying old friend Randy Randolph prefers same style RC flight hes having fun galore BIGMIG 061 RC Randy tells BIGMIG requires break-in period just like lapped-cast-iron-piston model engine says throttle works smoothly 5000 20000 rpm although fuel tank location little fussy didnt have much trouble fuel feed Randy thinks muffler pressure would help rather doubt clip-on muffler its bit trick figure out put has no gasket spring doesnt seem hold muffler particularly tightly against exhaust port boss Thats feel pressure available BIGMIG muffler tap youd have install yourself wouldnt amount much leads refuting another old misunderstanding ones about fuel feed engines seems logical because engines such famous Cox Tee Dee line tiny fuel lines should also small made mistake myself years before seeing light fact because VIA engines small amount fuel-delivery suction can induce needle valves minimal So should using largest-sized fuel tubing can install little engines cut down resistance fuel flow thus reduce its variability fact doesnt hurt employ big fuel tubing model engine Anything can reduce work takes get fuel out tank combustion chamber can oaly help Randy Randolphs reported results BIGMIG 061 RC bring up another interesting point Hes flying engine semiscale airplane 188-square-inch symmetricalBacked service training videos free technical hotline Si -8OO-35-O32 Askfo opeao MA77 o w eDepMA77 POBaxl5l7 SrfIUiY AenArbo M 48 061517 THE REST IN SCALE BRIAN TAYLOR PLANS Brian Taylor Englands best scale designers ke some US olan services Brian builds flies models designs Brian won 1st UK Nats Spit 1974 has wins last 20 s Brian has flown UK World scale team times has always did well Brian Mick Jim Reeves Will 1996 UK World Scale team POWER LASER 150 142 LBS Plan $4500 pp rolledNEW 82 F4U-1 Corsair Accessory set- fg cowl wing crank Ie moaldingsI canopy & spinner $9000 Retracts available LASER CUT PARTS ARE NOW AvAILABLE PRICE 56500 TOTAL OP $1000 POSTAGE linese Corsair size east 26 Other Brian Taylor plans available Did notice model looks like real picture model Visa Master card 01K BEST IN SCALE CATALOG $700 pos7 cola LA3LKLUI 51111 non HOLMAN PLANS PO Box 748 SAN BERNARDINO CA 92402 909 885 3959 FAX 909 889 9307 Sky Harbor RC Presents Mike Del Pontes Reviution V-Tail Q-500 Specifically designed Nelson Jett 0-500 Motors Pilots choice NATs four years running Holds numerous 0-500 Pylon records Standard equipment top pilots like Chip Hyde Richard Verano Mike Parker & Tony Lopez Hand crafted custom built ARF Light weight pre-built fuselage piece sheeted wing epoxy carbon fiber reinforcing hand select weigh piece balsa ensure 35 lbs airplane Aluminum back plate motor mount Nelson & Jeff motors well other racing items available Predictabli racing plane yet stable docile sport plane Proven race winning building set up details included airfoil wing model weighs 20 ounces Randy tried flying 6 x 3 prop turned 15000 rpm max anda5x 31 @ 20000 rpm found airplane performed considerably snappier small high-revving propeller results intrigued because prefer swinging big prop low rpm keeps bothersome noise pitch down often fly schoolyards Ive found higher efficiency large prop compensates power loss lower rpm Thats did engineering analysis Randys resultsand learned something Using rpm propeller dimensions variables found expected gross power output prop about same both 5-incher 20000 sixinch prop 15000 So did Randys model fly better small prop Propeller pitch Its useful rule thumb speed model miles per hour can roughly calcalated multiplying prop pitch inches its rpm thousands So 5 x 3 prop airplanes approximate maximum speed would 35 x 20 70mph 6 x 3 prop couldnt go faster 3 x 15 about 45 mph Thats what made difference small symmetrical-airfoil wing Randys airplane has fly pretty fast respond well control input performs better 5-inch prop because its flying faster True both engine/prop combinations produce nearly same usable power flatter-pitch prop wastes some power because theres no way can pull airplane faster about 45 mpheven dive prop acts like airbrake past its 45-mph limit use speed-limiting characteristic good effect CL Stunt models flat-pitch large-diameter prop say lOx 4 19 helps lot Stunt maneuvering because acts keep airplanes speed constant Climbing diving flying level four-inch-pitch prop 12000 rpm maintains models speed right around 48 mph makes controls work same throughout flight Thats big help guy gets little chance practice odel Aviation Sc 60 size uuu 2ize desigrinu iui risisuri & jee ize nes gnee rer cx xi no 140 ores r Canepy plus AOS cowl Scoop Exhaust tuild Kiter ARE Kit ges Relied Place ls Available Stable Racing/Sport Place e Warbird Racing association Coampion Flame 40 Sloe Sport ter Nelsen & Jet build & Fly cycle Radio 3-Channel B & M MODEL CO 290 W 1050 N LAYTON UT 84041 -445689 Call Send $300 Color Brochure models $000 Color Pamphlet Miss America Only UT REO ADO 625% TAX
Edition: Model Aviation - 1997/07
Page Numbers: 78, 79, 80, 82
U Joe Wagner WL7x / z7ciz Lx4p THERE ARE THREE Joe Wagners have become well-known model-airplane game top-level rubber-power competitor living California another New Englander perhaps best known attempt some years ago manufacture replicas post-WW II Bantam 19 Morton M-5 spark ignition engines Im Joe Wagner Chief Engineer Veco 1950s organized Model Engine Collectors Association MECA around 1960 wrote ModelAirplane News engine column almost ten years Now Im Model Aviation what can help new column about kinds model airplane engines except Electric motors rocket power gas turbines pulse jets Well talk about glow spark ignition diesels modem engines oldtimers two-strokes four-strokes Free Eight engines Control Line engines RC power plants CO2 compressed-air motors Thats lot interesting territory cover 60 years foozling about model airplane engines Ive built several contest-winning record-setting FF CL competition engines other fliers though gung-ho trophy seekers like AMA members Im fly-for-the-fun-of-it modeler want personal engines friendly reliable performers last long time hauling airplanes merrily though sky much prefer good manners ultimate shriekability interests similar let know let know too can adjust output good plan tell can about get maximum enjoyment satisfaction model engines Ill also try root out false beliefs misunderstandings about plenty mistaken notions floating around Heres Model engine propellers always require careful exact balancing minimize vibration power loss Sometimes single-cylinder engine will run noticeably faster smoother unbalanced prop Heres Its engineering impossibility dynamically balance singlecylinder engine True can make its crankshaft counterbalance heavy enough statically balance piston rod wristpin engine running vibrates just viciously side side would have vertical direction counterbalance Model engine designers mosfly work cut-and-try methods 78 Model Aviation rn reproductions Ben Shereshaws 1938 Bantam 16 spark-ignitionDual-ball-bearing MK-17 nearly vibration-free engine look run far better originalsdespite having no crankshaft counterbalance PAW 03 RIC standard-size Tygon fuel tubing Fat fuel Dual-ball-bearing Aviant 061 left includes prop brake floodoff tubing tiny engine makes steady running port case pressure tap AME 049 right Ten-inch prop Veco 19 same diameter fliers put 40s Pulls profile Stunt model through whole pattern decide much counterbalancing use crankshafts Some engines run incredibly smoothly no counterbalancing such modem Russian-made MK-17 09 diesel Others have extra counterbalance weights installed such lead slug dummy rear rotor K&Bs 1959 Torpedo 45 RC Since 1932 careful gas model fliers have always balanced propellers before using few years ago Don Garry Cocoa FL proved better smoother model engine performance can sometimes come purposely out-of-balance prop trick install prop its heavier blade directly opposite engines piston way acts added extemal counterbalance much imbalance best Theres no practical way predict Trial-and-error way go depends prop size material displacement design speed engine way its mounted airplane Im advising always use out-of-balance prop nor am suggesting throw away propeller-balancing equipment Im saying perfect balance isnt vital model airplane prop always believed since Don Garry opened eyes topic Ive quit spending time meticulously hand-balancing propellers install new prop put loose-fitting screwdriver blade through its center hole see closely prop balances blade tad heavy install opposite engines piston tighten nut go fly couple paragraphs back mentioned Russian-made model diesel engine Lately several model engines former USSR have appeared US hobby market Most made Ukraine Some replicas pre-WW II American spark-ignition types such 1938 Bantam 16 being imported Classic Old Time Engines 15731 Five Point Rd Penysburg OH 43551 Other Ukrainian engines state-of-the-art competition types such new competition Free Right Aviant 061 reliable source told thats made division famous Antonov aircraft company Kiev Unusual Thats about same Boeing model airplane engine subsidiary engines limited-production types consequently expensive Ukrainian-made AME BIGMIG engines imported NORVEL 2244 East Enterprise Twinsburg OH 44087 just well-made yet far less costly AMEs available 049 061 displacement RC unthrottled versions high-revving competition engines require pressurized fuel supply pressure available clip-on July1997 79 5uper CoveriteTM Fabric eastj use dont worrg nobodg ha know Some people believe achieving authentic looks vintage scale planes has difficult Coverite replies Nonsense Consider Super Coverite looks like cloth Flows around compound curves like cloth feels like cloth isnt surprising Super Coverite cloth tough woven polyester cloth Seal quick coat dope paint trimand remains fuelproofing handsome hard-wearing finish practically begs bragged about SUPER COVERITE fact irons includes strong fuelproof adhesive layer doesnt take thing away its mellow good looksjust time needed apply true look past less time try Super Coverite Available White Antique 38 x 45 sheets 45 x 15 rolls location dealer nearest please call 1-800-682-8948 mention code number 041 SY Distributed Exclusively Through GREAT PLANES MODEL DISTRIBUTORS PC Box 9021 Champaign IL 61 826-9021 80 Model Aviation ler comes engines isnt nearly enough reliable fuel deliveryespecially starting However importer has pressurized fuel supply systems available AME BIGMIIG havent seen yet sport-type BIGMIG though looks very much like its older brother AME friendlier engine far own AME havent flown anything yet because seldom use competition engines model flying old friend Randy Randolph prefers same style RC flight hes having fun galore BIGMIG 061 RC Randy tells BIGMIG requires break-in period just like lapped-cast-iron-piston model engine says throttle works smoothly 5000 20000 rpm although fuel tank location little fussy didnt have much trouble fuel feed Randy thinks muffler pressure would help rather doubt clip-on muffler its bit trick figure out put has no gasket spring doesnt seem hold muffler particularly tightly against exhaust port boss Thats feel pressure available BIGMIG muffler tap youd have install yourself wouldnt amount much leads refuting another old misunderstanding ones about fuel feed engines seems logical because engines such famous Cox Tee Dee line tiny fuel lines should also small made mistake myself years before seeing light fact because VIA engines small amount fuel-delivery suction can induce needle valves minimal So should using largest-sized fuel tubing can install little engines cut down resistance fuel flow thus reduce its variability fact doesnt hurt employ big fuel tubing model engine Anything can reduce work takes get fuel out tank combustion chamber can oaly help Randy Randolphs reported results BIGMIG 061 RC bring up another interesting point Hes flying engine semiscale airplane 188-square-inch symmetricalBacked service training videos free technical hotline Si -8OO-35-O32 Askfo opeao MA77 o w eDepMA77 POBaxl5l7 SrfIUiY AenArbo M 48 061517 THE REST IN SCALE BRIAN TAYLOR PLANS Brian Taylor Englands best scale designers ke some US olan services Brian builds flies models designs Brian won 1st UK Nats Spit 1974 has wins last 20 s Brian has flown UK World scale team times has always did well Brian Mick Jim Reeves Will 1996 UK World Scale team POWER LASER 150 142 LBS Plan $4500 pp rolledNEW 82 F4U-1 Corsair Accessory set- fg cowl wing crank Ie moaldingsI canopy & spinner $9000 Retracts available LASER CUT PARTS ARE NOW AvAILABLE PRICE 56500 TOTAL OP $1000 POSTAGE linese Corsair size east 26 Other Brian Taylor plans available Did notice model looks like real picture model Visa Master card 01K BEST IN SCALE CATALOG $700 pos7 cola LA3LKLUI 51111 non HOLMAN PLANS PO Box 748 SAN BERNARDINO CA 92402 909 885 3959 FAX 909 889 9307 Sky Harbor RC Presents Mike Del Pontes Reviution V-Tail Q-500 Specifically designed Nelson Jett 0-500 Motors Pilots choice NATs four years running Holds numerous 0-500 Pylon records Standard equipment top pilots like Chip Hyde Richard Verano Mike Parker & Tony Lopez Hand crafted custom built ARF Light weight pre-built fuselage piece sheeted wing epoxy carbon fiber reinforcing hand select weigh piece balsa ensure 35 lbs airplane Aluminum back plate motor mount Nelson & Jeff motors well other racing items available Predictabli racing plane yet stable docile sport plane Proven race winning building set up details included airfoil wing model weighs 20 ounces Randy tried flying 6 x 3 prop turned 15000 rpm max anda5x 31 @ 20000 rpm found airplane performed considerably snappier small high-revving propeller results intrigued because prefer swinging big prop low rpm keeps bothersome noise pitch down often fly schoolyards Ive found higher efficiency large prop compensates power loss lower rpm Thats did engineering analysis Randys resultsand learned something Using rpm propeller dimensions variables found expected gross power output prop about same both 5-incher 20000 sixinch prop 15000 So did Randys model fly better small prop Propeller pitch Its useful rule thumb speed model miles per hour can roughly calcalated multiplying prop pitch inches its rpm thousands So 5 x 3 prop airplanes approximate maximum speed would 35 x 20 70mph 6 x 3 prop couldnt go faster 3 x 15 about 45 mph Thats what made difference small symmetrical-airfoil wing Randys airplane has fly pretty fast respond well control input performs better 5-inch prop because its flying faster True both engine/prop combinations produce nearly same usable power flatter-pitch prop wastes some power because theres no way can pull airplane faster about 45 mpheven dive prop acts like airbrake past its 45-mph limit use speed-limiting characteristic good effect CL Stunt models flat-pitch large-diameter prop say lOx 4 19 helps lot Stunt maneuvering because acts keep airplanes speed constant Climbing diving flying level four-inch-pitch prop 12000 rpm maintains models speed right around 48 mph makes controls work same throughout flight Thats big help guy gets little chance practice odel Aviation Sc 60 size uuu 2ize desigrinu iui risisuri & jee ize nes gnee rer cx xi no 140 ores r Canepy plus AOS cowl Scoop Exhaust tuild Kiter ARE Kit ges Relied Place ls Available Stable Racing/Sport Place e Warbird Racing association Coampion Flame 40 Sloe Sport ter Nelsen & Jet build & Fly cycle Radio 3-Channel B & M MODEL CO 290 W 1050 N LAYTON UT 84041 -445689 Call Send $300 Color Brochure models $000 Color Pamphlet Miss America Only UT REO ADO 625% TAX
