THOSE OF YOU have following series may recall original objectives felt both active potential Giant Scalers lacked useful data about large gasoline-fueled engines becoming available As result same modelers have unable make logical selections aircraft wished build effort provide information modelers could easily relate confined testing measurements static thrust rpm various propellers fuel consumption prop produced highest thrust addition physical dimensions weight design details etc included listing engines tested relating issue dates provided near end article month want report com parison runs made engines involved never has intent make value judgments various Bob Beckman Dick Roe Earlier installments series have reported gasoline-fueled engines Giant Scale aircraft performance data gathered over extended period time different weather conditions testing session What would happen engines again tested within short time span report tells what authors found out Part 6 PropTKTZTZZZTZ Engine7Z 0 MagAeroTop RPM5400 128 cu inLb Thrust10 Kioritz JrTop RPM5800 128cuinLbThrust11 Evra 190Top RPM6700 19cuinLbThrust15 QuadraTop RPM7200 20 cu inLb Thrust185 HuskyTop RPM6800 20 Cu inLb Thrust155 Kawasaki TA-36Top RPM6700670062006700 222 Cu inLb Thrust2120195205 KioritzTop RPM74006800640071006300 24 cu inLb Thrust22522521524524 Magnum IITop RPM6900 25 Cu inLb Thrust22 Kawasaki TA-SiTop RPM6100 3lScu inLbThrust275 RoperTop RPM6100 37 Cu inLb Thrust275 TitanTop RPM6600 43 Cu inLb Thrust315 WestbendTop RPM6300 50 Cu inLb Thrust TTop Flite KKolboZzinger 29 II 36 Model Aviation engines have tried objective possible collecting presenting information need make decisions paricular situation purpose data presented show range power available order aid select ing engines likely successful projects plan take engines reported previous articles run same dayin short time span possible atmospheric conditions affecting engines operation would close identical possible case propeller produced best performance particular engine initial tests used run engines run same fuel mixture So much plan what actually happened 19 engines covered far five Big Banger articles 12 actually used series test runs three Quadras originally tested see July 1981 issue B version used home-brew conversion Homelite 16 mounted bones Sparrowhawk didnt feel worthwhile disturb since commercially-available engine Finally few engines already returned suppliers started sorting out propellers used reminded beginning project very limited selection Thanks various manufac turers now plenty props big engines decided make some extra runs some engines ensure did have best-performing prop first tests always made using fuel mixture recommended supplier engine still feel way go breaking new engine once has some time can safely move high ratio eg 501 mixture newer high-performance oils engine suppliers manufacturers have talked agree tests used 501 mixture regular gasoline oil supThe equipment needed days .... ui mis irme O8GK o simian wagon plied CB Associates same oil used Power Booster runs used oil nitroethane additive will reporting perfor mance Power Booster later time day test runs got kind weather hoping warm exceedingly hot humid conditions usually get mid summer conditions least unaided senses constant throughout tests addition day pleasant median between too cold too hot prevailed during other sessions test results roughly show effects weather engine performance previously tested cool days showed slight decrease performance Dont try make too detailed com parisons between current figures pre vious results too variables involved two obvious weather remember made runs fuel Although didnt check would expect higher ratio mix ture say 501 compared 201 show slightly lower fuel consumption less oil needles must set slightly leaner get same gasoline/air mixture lower oil content should mean cleaner running well depends great deal oil used have previously used recommended Bel Ray MC-l appar ently has high graphite content over period time builds up very black messy residue exhaust system didnt notice difference starting characteristics 501 fuel Most engines start easily hand few exceptions believe related ignition system used Some engines using electronic ignition instead points can difficult three prime examples group Roper 37 Magnum II Evra started Roper hand easily testing both Mag num II Evra started pull rope fact instructions come February 1983 37 Left Hand-flipping can used start engines electronic ignition systems Bob Beckman founa inst pulley-starting must him shown pulley lust behind spinner almost invisible Right Dick Roe left checks rpm Ouadra Walt Cislo assists Walt guy first pointed out Bob need kind information being gathered Big Bangers prolect Evra call technique required pulley supplied engine have also noticed Roper users starting pull cords Two appropriate questions point bad answer first will show No its necessarily bad its just characteristic system ignition system involved consists module includes magneto coils electronic timing components high tension lead plug no mechanical breaker points As far know modules made two manufacturers no matter what engine used manufacturers well original engine manu facturers agree unanimously magnets flywheel must travel past magneto poles some minimum speed before module can produce adequate spark plug minimum speed quoted usually works out between 400 800 rpm Now doesnt sound very fast After engine runs lot faster its idling usually about 1800 other hand takes pretty potent hand flip get prop flywheel moving fast get shot firing charge cylinder everything just right can often everything just rightespecially first time try run new engine Keep mind igni tion modules designed engines normally have recoil-type pull starter case point Magnum II Jim Messer version Piper Tomahawk engine fine performer really pulls Tomahawk nothing frustration until started use pull cord reports engine easy hand start surprised during initial testing engine resort pull starting After several phone discussions Jack Strickland Contempo about prop place ment propping techniques still couldnt start hand Ida Grove last August co-author Bob Beckman chance watch Jack start engine light dawned Saturday morning after plane sitting overnight storage tent Jack fueled up rocked prop back forth dozen times prime engine flipped twice ran After warmed up shut downand Bob tried start pop engine warmed up Bob took closer look Jacks technique prop set come up compression about 11 oclock position Jack started prop 3 oclock really some snap time went through compression point Bob tried again but couldnt get enough speed What boils down to start engines ignition modules have turn over fairly fast Since Jr hangs grimly Bob Srs Jim Messer Tomahawk Dick Roe pull-starts Magnum Ii hand-flipping helper restrain model must will fall somewhere between Super man Jack 220-pound weakling Bob lot going run problem solution quite simple however three four-foot length cord simple pulley prop shaft will start time As mentioned above Evra comes equipped pulley Ray Colleli maker Dynathrust props also makes Dynahub unit can replace prop adapter engines has built-in groove starter cord have access lathe can make simple pulley like Bobs Tomahawk consider need pull-cord starting detrimental fact can easier proping engine will start easily hand Once got message Magnum II Tomahawk started reliably time performed beauti fully Also note electronic ignition engines have characteristic system used Kawasaki engines example completely differentand have always started easily hand complete information test results engines involved report can found following issues Model via tion MagAero8/81 Kioritz Jr6/82 Evra 19010/81 Quadra4/81 7/81 Huskyl0/81 Kawasaki TA-364/81 Kioritz4/81 Magnum 116/82 Kawasaki TA-518/81 Roper 374/81 Titan6/ 82 Westbend6/ 82 Again wish thank firms listed below assistance Big Bangers project addition wish add personal thank Larry Jenno generous support right beginning Larry has retired no longer associated J&Z makers Zinger propellers doesnt intend give up Giant Scale Hell probably showing up fly-ins over country following firms have made report possible Air Tech PO Box 9044 Little Rock AR 72219 Westbend CB Asso ciates Inc. 21658 Cloud Way Hayward CA Continued page 126 38 Model Aviation dded back CB Associates spinner make sinie yet efiective starter pulley Notches center disc turned out unnecessary APPROX.6oz per revolution HAND CRANKED FOR SAFE RELIABLE USE r SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 513 735-1 576 thing needbefore developed Radio Technique/MyersIt would simple matter modify Ther Con tinued page 33mic Sniffler use aerodynamic yaw sen _______________________________________sor AYS An AYS would make efficient maneuvers really luck maneuvers RC sailplane flight possible could very RC pilot airshow pilot sitting inside important F3B flying special events airpline can see horizon precisely dupli- like Great Race RC-84- would prohibit cate such maneuvers upon command skill per- development such device before anyone mitting RC-84- would prohibit use some- creates COMPLETE THIS FORM AND ATTACH MAILING LABEL FROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOIN move please let us know advancesix weeks re quired change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 815 Fifteenth St. NW Washington DC. 20005 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA subscription rates $1BDO 12 months US possessions elsewhere Including Canada MexIco $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE _____________________________________________ ZIP _______________ MODEL AVIATION 815 FIFTEENTH ST. NW. WASHINGTON DC 20005 think banning gyros isa stupid move other hand banning Spin buttons Roll tons robots has merit RC-84-l should withdrawn rewritten say precisely what means Failing should defeated Write district RC Contest Board member tell him feelor suffer consequences Youll find him listed page lO9of issue Model siaion complete rule making procedure de scribed pages 1-4 15 June 1982 Competition Newsletter printed distributed separately magazine Ill bet dont know put Have Merry Christmas Happy New Year nice new frequencies play shouldnt everyone happy George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Big Bangers/Beckman & Roe Continued page 38 94545 Kawasaki Contempo Hobby Pro ducts 11611 Cantara St North Hollywood CA 91605 Magnum IIDynathrust Props Inc 2541 NE 11th Court Pompano Beach FL 33062 Gibbs Hobby & Research 6195 HilIfield St NW North Canton OH 44720 Kioritz Giezendanner USA PO Box 818 Pottstown PA 19464 Tachometer Hobby Lobby International Franklin Pike Circle Brentwood TN 37027 Evra 190 Homers Sales 30 Dixie Hwy Beecher IL 60401 Roper iC Enterprises 2251 SW 28th Terrace Fort Lauderdale FL 33312 Husky J&Z Products 25029 5 Vermont Ave Harbor City CA 90710 Zinger Mag Aero Mfg Co PO Box 490 Freeland WA 98249 Roush Mfg Co Rear 3405 Cleve Ave SW Canton OH 44707 Kioritz Jr & Titan Top Elite Models Inc 1901 Narra gansett Ave Chicago IL 60639 Trinden Manufacturing Ltd PO Box 544 Huron Park Ontario Canada NOM IYO Quadra US Quadra 1032 East Mani towac Ave Oak Creek WI 53154 Auction/Cosmato Continued page 41 elect include preregistration swap shop tables Local advertising okay especially free TV radio stations local newspapers offer free advertising under public service announcements Al though interested people will already know about event experience has shown us local advertising nets club few new members year Concessions concession stand can best moneymakers can also biggest headache has potential costing whole trick keep simple Almost everybody likes hot dogs easy prepare can sold three times actual cost Dont cheat quality People would rather pay $1 good all-meat dog homemade chili fresh condiments would 3/ $1 dogs cardboard buns cereal wieners 126 Model Aviation 4% 6/a4Y/e4 SPORT WINCH LightweIght 34 lbs 155kg battery SurprIsing performance r develops 9 HP Reliable & durable ity Components Easy use stable electrodynamic brake help prevent backlashes Complete around parachute 600 meters 90 lb braided nylon line $21500 battery shipping charges included also sell finest 160 lb braided nylon contest towline $19201600 meters plus shipping Send Complete descriptive literature price list a4c7e49c 68 Morgan Ave DanbUry CT 06810 TEL203 743-3312
Edition: Model Aviation - 1983/02
Page Numbers: 36, 37, 38, 126
THOSE OF YOU have following series may recall original objectives felt both active potential Giant Scalers lacked useful data about large gasoline-fueled engines becoming available As result same modelers have unable make logical selections aircraft wished build effort provide information modelers could easily relate confined testing measurements static thrust rpm various propellers fuel consumption prop produced highest thrust addition physical dimensions weight design details etc included listing engines tested relating issue dates provided near end article month want report com parison runs made engines involved never has intent make value judgments various Bob Beckman Dick Roe Earlier installments series have reported gasoline-fueled engines Giant Scale aircraft performance data gathered over extended period time different weather conditions testing session What would happen engines again tested within short time span report tells what authors found out Part 6 PropTKTZTZZZTZ Engine7Z 0 MagAeroTop RPM5400 128 cu inLb Thrust10 Kioritz JrTop RPM5800 128cuinLbThrust11 Evra 190Top RPM6700 19cuinLbThrust15 QuadraTop RPM7200 20 cu inLb Thrust185 HuskyTop RPM6800 20 Cu inLb Thrust155 Kawasaki TA-36Top RPM6700670062006700 222 Cu inLb Thrust2120195205 KioritzTop RPM74006800640071006300 24 cu inLb Thrust22522521524524 Magnum IITop RPM6900 25 Cu inLb Thrust22 Kawasaki TA-SiTop RPM6100 3lScu inLbThrust275 RoperTop RPM6100 37 Cu inLb Thrust275 TitanTop RPM6600 43 Cu inLb Thrust315 WestbendTop RPM6300 50 Cu inLb Thrust TTop Flite KKolboZzinger 29 II 36 Model Aviation engines have tried objective possible collecting presenting information need make decisions paricular situation purpose data presented show range power available order aid select ing engines likely successful projects plan take engines reported previous articles run same dayin short time span possible atmospheric conditions affecting engines operation would close identical possible case propeller produced best performance particular engine initial tests used run engines run same fuel mixture So much plan what actually happened 19 engines covered far five Big Banger articles 12 actually used series test runs three Quadras originally tested see July 1981 issue B version used home-brew conversion Homelite 16 mounted bones Sparrowhawk didnt feel worthwhile disturb since commercially-available engine Finally few engines already returned suppliers started sorting out propellers used reminded beginning project very limited selection Thanks various manufac turers now plenty props big engines decided make some extra runs some engines ensure did have best-performing prop first tests always made using fuel mixture recommended supplier engine still feel way go breaking new engine once has some time can safely move high ratio eg 501 mixture newer high-performance oils engine suppliers manufacturers have talked agree tests used 501 mixture regular gasoline oil supThe equipment needed days .... ui mis irme O8GK o simian wagon plied CB Associates same oil used Power Booster runs used oil nitroethane additive will reporting perfor mance Power Booster later time day test runs got kind weather hoping warm exceedingly hot humid conditions usually get mid summer conditions least unaided senses constant throughout tests addition day pleasant median between too cold too hot prevailed during other sessions test results roughly show effects weather engine performance previously tested cool days showed slight decrease performance Dont try make too detailed com parisons between current figures pre vious results too variables involved two obvious weather remember made runs fuel Although didnt check would expect higher ratio mix ture say 501 compared 201 show slightly lower fuel consumption less oil needles must set slightly leaner get same gasoline/air mixture lower oil content should mean cleaner running well depends great deal oil used have previously used recommended Bel Ray MC-l appar ently has high graphite content over period time builds up very black messy residue exhaust system didnt notice difference starting characteristics 501 fuel Most engines start easily hand few exceptions believe related ignition system used Some engines using electronic ignition instead points can difficult three prime examples group Roper 37 Magnum II Evra started Roper hand easily testing both Mag num II Evra started pull rope fact instructions come February 1983 37 Left Hand-flipping can used start engines electronic ignition systems Bob Beckman founa inst pulley-starting must him shown pulley lust behind spinner almost invisible Right Dick Roe left checks rpm Ouadra Walt Cislo assists Walt guy first pointed out Bob need kind information being gathered Big Bangers prolect Evra call technique required pulley supplied engine have also noticed Roper users starting pull cords Two appropriate questions point bad answer first will show No its necessarily bad its just characteristic system ignition system involved consists module includes magneto coils electronic timing components high tension lead plug no mechanical breaker points As far know modules made two manufacturers no matter what engine used manufacturers well original engine manu facturers agree unanimously magnets flywheel must travel past magneto poles some minimum speed before module can produce adequate spark plug minimum speed quoted usually works out between 400 800 rpm Now doesnt sound very fast After engine runs lot faster its idling usually about 1800 other hand takes pretty potent hand flip get prop flywheel moving fast get shot firing charge cylinder everything just right can often everything just rightespecially first time try run new engine Keep mind igni tion modules designed engines normally have recoil-type pull starter case point Magnum II Jim Messer version Piper Tomahawk engine fine performer really pulls Tomahawk nothing frustration until started use pull cord reports engine easy hand start surprised during initial testing engine resort pull starting After several phone discussions Jack Strickland Contempo about prop place ment propping techniques still couldnt start hand Ida Grove last August co-author Bob Beckman chance watch Jack start engine light dawned Saturday morning after plane sitting overnight storage tent Jack fueled up rocked prop back forth dozen times prime engine flipped twice ran After warmed up shut downand Bob tried start pop engine warmed up Bob took closer look Jacks technique prop set come up compression about 11 oclock position Jack started prop 3 oclock really some snap time went through compression point Bob tried again but couldnt get enough speed What boils down to start engines ignition modules have turn over fairly fast Since Jr hangs grimly Bob Srs Jim Messer Tomahawk Dick Roe pull-starts Magnum Ii hand-flipping helper restrain model must will fall somewhere between Super man Jack 220-pound weakling Bob lot going run problem solution quite simple however three four-foot length cord simple pulley prop shaft will start time As mentioned above Evra comes equipped pulley Ray Colleli maker Dynathrust props also makes Dynahub unit can replace prop adapter engines has built-in groove starter cord have access lathe can make simple pulley like Bobs Tomahawk consider need pull-cord starting detrimental fact can easier proping engine will start easily hand Once got message Magnum II Tomahawk started reliably time performed beauti fully Also note electronic ignition engines have characteristic system used Kawasaki engines example completely differentand have always started easily hand complete information test results engines involved report can found following issues Model via tion MagAero8/81 Kioritz Jr6/82 Evra 19010/81 Quadra4/81 7/81 Huskyl0/81 Kawasaki TA-364/81 Kioritz4/81 Magnum 116/82 Kawasaki TA-518/81 Roper 374/81 Titan6/ 82 Westbend6/ 82 Again wish thank firms listed below assistance Big Bangers project addition wish add personal thank Larry Jenno generous support right beginning Larry has retired no longer associated J&Z makers Zinger propellers doesnt intend give up Giant Scale Hell probably showing up fly-ins over country following firms have made report possible Air Tech PO Box 9044 Little Rock AR 72219 Westbend CB Asso ciates Inc. 21658 Cloud Way Hayward CA Continued page 126 38 Model Aviation dded back CB Associates spinner make sinie yet efiective starter pulley Notches center disc turned out unnecessary APPROX.6oz per revolution HAND CRANKED FOR SAFE RELIABLE USE r SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 513 735-1 576 thing needbefore developed Radio Technique/MyersIt would simple matter modify Ther Con tinued page 33mic Sniffler use aerodynamic yaw sen _______________________________________sor AYS An AYS would make efficient maneuvers really luck maneuvers RC sailplane flight possible could very RC pilot airshow pilot sitting inside important F3B flying special events airpline can see horizon precisely dupli- like Great Race RC-84- would prohibit cate such maneuvers upon command skill per- development such device before anyone mitting RC-84- would prohibit use some- creates COMPLETE THIS FORM AND ATTACH MAILING LABEL FROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOIN move please let us know advancesix weeks re quired change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 815 Fifteenth St. NW Washington DC. 20005 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA subscription rates $1BDO 12 months US possessions elsewhere Including Canada MexIco $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE _____________________________________________ ZIP _______________ MODEL AVIATION 815 FIFTEENTH ST. NW. WASHINGTON DC 20005 think banning gyros isa stupid move other hand banning Spin buttons Roll tons robots has merit RC-84-l should withdrawn rewritten say precisely what means Failing should defeated Write district RC Contest Board member tell him feelor suffer consequences Youll find him listed page lO9of issue Model siaion complete rule making procedure de scribed pages 1-4 15 June 1982 Competition Newsletter printed distributed separately magazine Ill bet dont know put Have Merry Christmas Happy New Year nice new frequencies play shouldnt everyone happy George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Big Bangers/Beckman & Roe Continued page 38 94545 Kawasaki Contempo Hobby Pro ducts 11611 Cantara St North Hollywood CA 91605 Magnum IIDynathrust Props Inc 2541 NE 11th Court Pompano Beach FL 33062 Gibbs Hobby & Research 6195 HilIfield St NW North Canton OH 44720 Kioritz Giezendanner USA PO Box 818 Pottstown PA 19464 Tachometer Hobby Lobby International Franklin Pike Circle Brentwood TN 37027 Evra 190 Homers Sales 30 Dixie Hwy Beecher IL 60401 Roper iC Enterprises 2251 SW 28th Terrace Fort Lauderdale FL 33312 Husky J&Z Products 25029 5 Vermont Ave Harbor City CA 90710 Zinger Mag Aero Mfg Co PO Box 490 Freeland WA 98249 Roush Mfg Co Rear 3405 Cleve Ave SW Canton OH 44707 Kioritz Jr & Titan Top Elite Models Inc 1901 Narra gansett Ave Chicago IL 60639 Trinden Manufacturing Ltd PO Box 544 Huron Park Ontario Canada NOM IYO Quadra US Quadra 1032 East Mani towac Ave Oak Creek WI 53154 Auction/Cosmato Continued page 41 elect include preregistration swap shop tables Local advertising okay especially free TV radio stations local newspapers offer free advertising under public service announcements Al though interested people will already know about event experience has shown us local advertising nets club few new members year Concessions concession stand can best moneymakers can also biggest headache has potential costing whole trick keep simple Almost everybody likes hot dogs easy prepare can sold three times actual cost Dont cheat quality People would rather pay $1 good all-meat dog homemade chili fresh condiments would 3/ $1 dogs cardboard buns cereal wieners 126 Model Aviation 4% 6/a4Y/e4 SPORT WINCH LightweIght 34 lbs 155kg battery SurprIsing performance r develops 9 HP Reliable & durable ity Components Easy use stable electrodynamic brake help prevent backlashes Complete around parachute 600 meters 90 lb braided nylon line $21500 battery shipping charges included also sell finest 160 lb braided nylon contest towline $19201600 meters plus shipping Send Complete descriptive literature price list a4c7e49c 68 Morgan Ave DanbUry CT 06810 TEL203 743-3312
Edition: Model Aviation - 1983/02
Page Numbers: 36, 37, 38, 126
THOSE OF YOU have following series may recall original objectives felt both active potential Giant Scalers lacked useful data about large gasoline-fueled engines becoming available As result same modelers have unable make logical selections aircraft wished build effort provide information modelers could easily relate confined testing measurements static thrust rpm various propellers fuel consumption prop produced highest thrust addition physical dimensions weight design details etc included listing engines tested relating issue dates provided near end article month want report com parison runs made engines involved never has intent make value judgments various Bob Beckman Dick Roe Earlier installments series have reported gasoline-fueled engines Giant Scale aircraft performance data gathered over extended period time different weather conditions testing session What would happen engines again tested within short time span report tells what authors found out Part 6 PropTKTZTZZZTZ Engine7Z 0 MagAeroTop RPM5400 128 cu inLb Thrust10 Kioritz JrTop RPM5800 128cuinLbThrust11 Evra 190Top RPM6700 19cuinLbThrust15 QuadraTop RPM7200 20 cu inLb Thrust185 HuskyTop RPM6800 20 Cu inLb Thrust155 Kawasaki TA-36Top RPM6700670062006700 222 Cu inLb Thrust2120195205 KioritzTop RPM74006800640071006300 24 cu inLb Thrust22522521524524 Magnum IITop RPM6900 25 Cu inLb Thrust22 Kawasaki TA-SiTop RPM6100 3lScu inLbThrust275 RoperTop RPM6100 37 Cu inLb Thrust275 TitanTop RPM6600 43 Cu inLb Thrust315 WestbendTop RPM6300 50 Cu inLb Thrust TTop Flite KKolboZzinger 29 II 36 Model Aviation engines have tried objective possible collecting presenting information need make decisions paricular situation purpose data presented show range power available order aid select ing engines likely successful projects plan take engines reported previous articles run same dayin short time span possible atmospheric conditions affecting engines operation would close identical possible case propeller produced best performance particular engine initial tests used run engines run same fuel mixture So much plan what actually happened 19 engines covered far five Big Banger articles 12 actually used series test runs three Quadras originally tested see July 1981 issue B version used home-brew conversion Homelite 16 mounted bones Sparrowhawk didnt feel worthwhile disturb since commercially-available engine Finally few engines already returned suppliers started sorting out propellers used reminded beginning project very limited selection Thanks various manufac turers now plenty props big engines decided make some extra runs some engines ensure did have best-performing prop first tests always made using fuel mixture recommended supplier engine still feel way go breaking new engine once has some time can safely move high ratio eg 501 mixture newer high-performance oils engine suppliers manufacturers have talked agree tests used 501 mixture regular gasoline oil supThe equipment needed days .... ui mis irme O8GK o simian wagon plied CB Associates same oil used Power Booster runs used oil nitroethane additive will reporting perfor mance Power Booster later time day test runs got kind weather hoping warm exceedingly hot humid conditions usually get mid summer conditions least unaided senses constant throughout tests addition day pleasant median between too cold too hot prevailed during other sessions test results roughly show effects weather engine performance previously tested cool days showed slight decrease performance Dont try make too detailed com parisons between current figures pre vious results too variables involved two obvious weather remember made runs fuel Although didnt check would expect higher ratio mix ture say 501 compared 201 show slightly lower fuel consumption less oil needles must set slightly leaner get same gasoline/air mixture lower oil content should mean cleaner running well depends great deal oil used have previously used recommended Bel Ray MC-l appar ently has high graphite content over period time builds up very black messy residue exhaust system didnt notice difference starting characteristics 501 fuel Most engines start easily hand few exceptions believe related ignition system used Some engines using electronic ignition instead points can difficult three prime examples group Roper 37 Magnum II Evra started Roper hand easily testing both Mag num II Evra started pull rope fact instructions come February 1983 37 Left Hand-flipping can used start engines electronic ignition systems Bob Beckman founa inst pulley-starting must him shown pulley lust behind spinner almost invisible Right Dick Roe left checks rpm Ouadra Walt Cislo assists Walt guy first pointed out Bob need kind information being gathered Big Bangers prolect Evra call technique required pulley supplied engine have also noticed Roper users starting pull cords Two appropriate questions point bad answer first will show No its necessarily bad its just characteristic system ignition system involved consists module includes magneto coils electronic timing components high tension lead plug no mechanical breaker points As far know modules made two manufacturers no matter what engine used manufacturers well original engine manu facturers agree unanimously magnets flywheel must travel past magneto poles some minimum speed before module can produce adequate spark plug minimum speed quoted usually works out between 400 800 rpm Now doesnt sound very fast After engine runs lot faster its idling usually about 1800 other hand takes pretty potent hand flip get prop flywheel moving fast get shot firing charge cylinder everything just right can often everything just rightespecially first time try run new engine Keep mind igni tion modules designed engines normally have recoil-type pull starter case point Magnum II Jim Messer version Piper Tomahawk engine fine performer really pulls Tomahawk nothing frustration until started use pull cord reports engine easy hand start surprised during initial testing engine resort pull starting After several phone discussions Jack Strickland Contempo about prop place ment propping techniques still couldnt start hand Ida Grove last August co-author Bob Beckman chance watch Jack start engine light dawned Saturday morning after plane sitting overnight storage tent Jack fueled up rocked prop back forth dozen times prime engine flipped twice ran After warmed up shut downand Bob tried start pop engine warmed up Bob took closer look Jacks technique prop set come up compression about 11 oclock position Jack started prop 3 oclock really some snap time went through compression point Bob tried again but couldnt get enough speed What boils down to start engines ignition modules have turn over fairly fast Since Jr hangs grimly Bob Srs Jim Messer Tomahawk Dick Roe pull-starts Magnum Ii hand-flipping helper restrain model must will fall somewhere between Super man Jack 220-pound weakling Bob lot going run problem solution quite simple however three four-foot length cord simple pulley prop shaft will start time As mentioned above Evra comes equipped pulley Ray Colleli maker Dynathrust props also makes Dynahub unit can replace prop adapter engines has built-in groove starter cord have access lathe can make simple pulley like Bobs Tomahawk consider need pull-cord starting detrimental fact can easier proping engine will start easily hand Once got message Magnum II Tomahawk started reliably time performed beauti fully Also note electronic ignition engines have characteristic system used Kawasaki engines example completely differentand have always started easily hand complete information test results engines involved report can found following issues Model via tion MagAero8/81 Kioritz Jr6/82 Evra 19010/81 Quadra4/81 7/81 Huskyl0/81 Kawasaki TA-364/81 Kioritz4/81 Magnum 116/82 Kawasaki TA-518/81 Roper 374/81 Titan6/ 82 Westbend6/ 82 Again wish thank firms listed below assistance Big Bangers project addition wish add personal thank Larry Jenno generous support right beginning Larry has retired no longer associated J&Z makers Zinger propellers doesnt intend give up Giant Scale Hell probably showing up fly-ins over country following firms have made report possible Air Tech PO Box 9044 Little Rock AR 72219 Westbend CB Asso ciates Inc. 21658 Cloud Way Hayward CA Continued page 126 38 Model Aviation dded back CB Associates spinner make sinie yet efiective starter pulley Notches center disc turned out unnecessary APPROX.6oz per revolution HAND CRANKED FOR SAFE RELIABLE USE r SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 513 735-1 576 thing needbefore developed Radio Technique/MyersIt would simple matter modify Ther Con tinued page 33mic Sniffler use aerodynamic yaw sen _______________________________________sor AYS An AYS would make efficient maneuvers really luck maneuvers RC sailplane flight possible could very RC pilot airshow pilot sitting inside important F3B flying special events airpline can see horizon precisely dupli- like Great Race RC-84- would prohibit cate such maneuvers upon command skill per- development such device before anyone mitting RC-84- would prohibit use some- creates COMPLETE THIS FORM AND ATTACH MAILING LABEL FROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOIN move please let us know advancesix weeks re quired change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 815 Fifteenth St. NW Washington DC. 20005 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA subscription rates $1BDO 12 months US possessions elsewhere Including Canada MexIco $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE _____________________________________________ ZIP _______________ MODEL AVIATION 815 FIFTEENTH ST. NW. WASHINGTON DC 20005 think banning gyros isa stupid move other hand banning Spin buttons Roll tons robots has merit RC-84-l should withdrawn rewritten say precisely what means Failing should defeated Write district RC Contest Board member tell him feelor suffer consequences Youll find him listed page lO9of issue Model siaion complete rule making procedure de scribed pages 1-4 15 June 1982 Competition Newsletter printed distributed separately magazine Ill bet dont know put Have Merry Christmas Happy New Year nice new frequencies play shouldnt everyone happy George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Big Bangers/Beckman & Roe Continued page 38 94545 Kawasaki Contempo Hobby Pro ducts 11611 Cantara St North Hollywood CA 91605 Magnum IIDynathrust Props Inc 2541 NE 11th Court Pompano Beach FL 33062 Gibbs Hobby & Research 6195 HilIfield St NW North Canton OH 44720 Kioritz Giezendanner USA PO Box 818 Pottstown PA 19464 Tachometer Hobby Lobby International Franklin Pike Circle Brentwood TN 37027 Evra 190 Homers Sales 30 Dixie Hwy Beecher IL 60401 Roper iC Enterprises 2251 SW 28th Terrace Fort Lauderdale FL 33312 Husky J&Z Products 25029 5 Vermont Ave Harbor City CA 90710 Zinger Mag Aero Mfg Co PO Box 490 Freeland WA 98249 Roush Mfg Co Rear 3405 Cleve Ave SW Canton OH 44707 Kioritz Jr & Titan Top Elite Models Inc 1901 Narra gansett Ave Chicago IL 60639 Trinden Manufacturing Ltd PO Box 544 Huron Park Ontario Canada NOM IYO Quadra US Quadra 1032 East Mani towac Ave Oak Creek WI 53154 Auction/Cosmato Continued page 41 elect include preregistration swap shop tables Local advertising okay especially free TV radio stations local newspapers offer free advertising under public service announcements Al though interested people will already know about event experience has shown us local advertising nets club few new members year Concessions concession stand can best moneymakers can also biggest headache has potential costing whole trick keep simple Almost everybody likes hot dogs easy prepare can sold three times actual cost Dont cheat quality People would rather pay $1 good all-meat dog homemade chili fresh condiments would 3/ $1 dogs cardboard buns cereal wieners 126 Model Aviation 4% 6/a4Y/e4 SPORT WINCH LightweIght 34 lbs 155kg battery SurprIsing performance r develops 9 HP Reliable & durable ity Components Easy use stable electrodynamic brake help prevent backlashes Complete around parachute 600 meters 90 lb braided nylon line $21500 battery shipping charges included also sell finest 160 lb braided nylon contest towline $19201600 meters plus shipping Send Complete descriptive literature price list a4c7e49c 68 Morgan Ave DanbUry CT 06810 TEL203 743-3312
Edition: Model Aviation - 1983/02
Page Numbers: 36, 37, 38, 126
THOSE OF YOU have following series may recall original objectives felt both active potential Giant Scalers lacked useful data about large gasoline-fueled engines becoming available As result same modelers have unable make logical selections aircraft wished build effort provide information modelers could easily relate confined testing measurements static thrust rpm various propellers fuel consumption prop produced highest thrust addition physical dimensions weight design details etc included listing engines tested relating issue dates provided near end article month want report com parison runs made engines involved never has intent make value judgments various Bob Beckman Dick Roe Earlier installments series have reported gasoline-fueled engines Giant Scale aircraft performance data gathered over extended period time different weather conditions testing session What would happen engines again tested within short time span report tells what authors found out Part 6 PropTKTZTZZZTZ Engine7Z 0 MagAeroTop RPM5400 128 cu inLb Thrust10 Kioritz JrTop RPM5800 128cuinLbThrust11 Evra 190Top RPM6700 19cuinLbThrust15 QuadraTop RPM7200 20 cu inLb Thrust185 HuskyTop RPM6800 20 Cu inLb Thrust155 Kawasaki TA-36Top RPM6700670062006700 222 Cu inLb Thrust2120195205 KioritzTop RPM74006800640071006300 24 cu inLb Thrust22522521524524 Magnum IITop RPM6900 25 Cu inLb Thrust22 Kawasaki TA-SiTop RPM6100 3lScu inLbThrust275 RoperTop RPM6100 37 Cu inLb Thrust275 TitanTop RPM6600 43 Cu inLb Thrust315 WestbendTop RPM6300 50 Cu inLb Thrust TTop Flite KKolboZzinger 29 II 36 Model Aviation engines have tried objective possible collecting presenting information need make decisions paricular situation purpose data presented show range power available order aid select ing engines likely successful projects plan take engines reported previous articles run same dayin short time span possible atmospheric conditions affecting engines operation would close identical possible case propeller produced best performance particular engine initial tests used run engines run same fuel mixture So much plan what actually happened 19 engines covered far five Big Banger articles 12 actually used series test runs three Quadras originally tested see July 1981 issue B version used home-brew conversion Homelite 16 mounted bones Sparrowhawk didnt feel worthwhile disturb since commercially-available engine Finally few engines already returned suppliers started sorting out propellers used reminded beginning project very limited selection Thanks various manufac turers now plenty props big engines decided make some extra runs some engines ensure did have best-performing prop first tests always made using fuel mixture recommended supplier engine still feel way go breaking new engine once has some time can safely move high ratio eg 501 mixture newer high-performance oils engine suppliers manufacturers have talked agree tests used 501 mixture regular gasoline oil supThe equipment needed days .... ui mis irme O8GK o simian wagon plied CB Associates same oil used Power Booster runs used oil nitroethane additive will reporting perfor mance Power Booster later time day test runs got kind weather hoping warm exceedingly hot humid conditions usually get mid summer conditions least unaided senses constant throughout tests addition day pleasant median between too cold too hot prevailed during other sessions test results roughly show effects weather engine performance previously tested cool days showed slight decrease performance Dont try make too detailed com parisons between current figures pre vious results too variables involved two obvious weather remember made runs fuel Although didnt check would expect higher ratio mix ture say 501 compared 201 show slightly lower fuel consumption less oil needles must set slightly leaner get same gasoline/air mixture lower oil content should mean cleaner running well depends great deal oil used have previously used recommended Bel Ray MC-l appar ently has high graphite content over period time builds up very black messy residue exhaust system didnt notice difference starting characteristics 501 fuel Most engines start easily hand few exceptions believe related ignition system used Some engines using electronic ignition instead points can difficult three prime examples group Roper 37 Magnum II Evra started Roper hand easily testing both Mag num II Evra started pull rope fact instructions come February 1983 37 Left Hand-flipping can used start engines electronic ignition systems Bob Beckman founa inst pulley-starting must him shown pulley lust behind spinner almost invisible Right Dick Roe left checks rpm Ouadra Walt Cislo assists Walt guy first pointed out Bob need kind information being gathered Big Bangers prolect Evra call technique required pulley supplied engine have also noticed Roper users starting pull cords Two appropriate questions point bad answer first will show No its necessarily bad its just characteristic system ignition system involved consists module includes magneto coils electronic timing components high tension lead plug no mechanical breaker points As far know modules made two manufacturers no matter what engine used manufacturers well original engine manu facturers agree unanimously magnets flywheel must travel past magneto poles some minimum speed before module can produce adequate spark plug minimum speed quoted usually works out between 400 800 rpm Now doesnt sound very fast After engine runs lot faster its idling usually about 1800 other hand takes pretty potent hand flip get prop flywheel moving fast get shot firing charge cylinder everything just right can often everything just rightespecially first time try run new engine Keep mind igni tion modules designed engines normally have recoil-type pull starter case point Magnum II Jim Messer version Piper Tomahawk engine fine performer really pulls Tomahawk nothing frustration until started use pull cord reports engine easy hand start surprised during initial testing engine resort pull starting After several phone discussions Jack Strickland Contempo about prop place ment propping techniques still couldnt start hand Ida Grove last August co-author Bob Beckman chance watch Jack start engine light dawned Saturday morning after plane sitting overnight storage tent Jack fueled up rocked prop back forth dozen times prime engine flipped twice ran After warmed up shut downand Bob tried start pop engine warmed up Bob took closer look Jacks technique prop set come up compression about 11 oclock position Jack started prop 3 oclock really some snap time went through compression point Bob tried again but couldnt get enough speed What boils down to start engines ignition modules have turn over fairly fast Since Jr hangs grimly Bob Srs Jim Messer Tomahawk Dick Roe pull-starts Magnum Ii hand-flipping helper restrain model must will fall somewhere between Super man Jack 220-pound weakling Bob lot going run problem solution quite simple however three four-foot length cord simple pulley prop shaft will start time As mentioned above Evra comes equipped pulley Ray Colleli maker Dynathrust props also makes Dynahub unit can replace prop adapter engines has built-in groove starter cord have access lathe can make simple pulley like Bobs Tomahawk consider need pull-cord starting detrimental fact can easier proping engine will start easily hand Once got message Magnum II Tomahawk started reliably time performed beauti fully Also note electronic ignition engines have characteristic system used Kawasaki engines example completely differentand have always started easily hand complete information test results engines involved report can found following issues Model via tion MagAero8/81 Kioritz Jr6/82 Evra 19010/81 Quadra4/81 7/81 Huskyl0/81 Kawasaki TA-364/81 Kioritz4/81 Magnum 116/82 Kawasaki TA-518/81 Roper 374/81 Titan6/ 82 Westbend6/ 82 Again wish thank firms listed below assistance Big Bangers project addition wish add personal thank Larry Jenno generous support right beginning Larry has retired no longer associated J&Z makers Zinger propellers doesnt intend give up Giant Scale Hell probably showing up fly-ins over country following firms have made report possible Air Tech PO Box 9044 Little Rock AR 72219 Westbend CB Asso ciates Inc. 21658 Cloud Way Hayward CA Continued page 126 38 Model Aviation dded back CB Associates spinner make sinie yet efiective starter pulley Notches center disc turned out unnecessary APPROX.6oz per revolution HAND CRANKED FOR SAFE RELIABLE USE r SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 513 735-1 576 thing needbefore developed Radio Technique/MyersIt would simple matter modify Ther Con tinued page 33mic Sniffler use aerodynamic yaw sen _______________________________________sor AYS An AYS would make efficient maneuvers really luck maneuvers RC sailplane flight possible could very RC pilot airshow pilot sitting inside important F3B flying special events airpline can see horizon precisely dupli- like Great Race RC-84- would prohibit cate such maneuvers upon command skill per- development such device before anyone mitting RC-84- would prohibit use some- creates COMPLETE THIS FORM AND ATTACH MAILING LABEL FROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOIN move please let us know advancesix weeks re quired change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 815 Fifteenth St. NW Washington DC. 20005 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA subscription rates $1BDO 12 months US possessions elsewhere Including Canada MexIco $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE _____________________________________________ ZIP _______________ MODEL AVIATION 815 FIFTEENTH ST. NW. WASHINGTON DC 20005 think banning gyros isa stupid move other hand banning Spin buttons Roll tons robots has merit RC-84-l should withdrawn rewritten say precisely what means Failing should defeated Write district RC Contest Board member tell him feelor suffer consequences Youll find him listed page lO9of issue Model siaion complete rule making procedure de scribed pages 1-4 15 June 1982 Competition Newsletter printed distributed separately magazine Ill bet dont know put Have Merry Christmas Happy New Year nice new frequencies play shouldnt everyone happy George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Big Bangers/Beckman & Roe Continued page 38 94545 Kawasaki Contempo Hobby Pro ducts 11611 Cantara St North Hollywood CA 91605 Magnum IIDynathrust Props Inc 2541 NE 11th Court Pompano Beach FL 33062 Gibbs Hobby & Research 6195 HilIfield St NW North Canton OH 44720 Kioritz Giezendanner USA PO Box 818 Pottstown PA 19464 Tachometer Hobby Lobby International Franklin Pike Circle Brentwood TN 37027 Evra 190 Homers Sales 30 Dixie Hwy Beecher IL 60401 Roper iC Enterprises 2251 SW 28th Terrace Fort Lauderdale FL 33312 Husky J&Z Products 25029 5 Vermont Ave Harbor City CA 90710 Zinger Mag Aero Mfg Co PO Box 490 Freeland WA 98249 Roush Mfg Co Rear 3405 Cleve Ave SW Canton OH 44707 Kioritz Jr & Titan Top Elite Models Inc 1901 Narra gansett Ave Chicago IL 60639 Trinden Manufacturing Ltd PO Box 544 Huron Park Ontario Canada NOM IYO Quadra US Quadra 1032 East Mani towac Ave Oak Creek WI 53154 Auction/Cosmato Continued page 41 elect include preregistration swap shop tables Local advertising okay especially free TV radio stations local newspapers offer free advertising under public service announcements Al though interested people will already know about event experience has shown us local advertising nets club few new members year Concessions concession stand can best moneymakers can also biggest headache has potential costing whole trick keep simple Almost everybody likes hot dogs easy prepare can sold three times actual cost Dont cheat quality People would rather pay $1 good all-meat dog homemade chili fresh condiments would 3/ $1 dogs cardboard buns cereal wieners 126 Model Aviation 4% 6/a4Y/e4 SPORT WINCH LightweIght 34 lbs 155kg battery SurprIsing performance r develops 9 HP Reliable & durable ity Components Easy use stable electrodynamic brake help prevent backlashes Complete around parachute 600 meters 90 lb braided nylon line $21500 battery shipping charges included also sell finest 160 lb braided nylon contest towline $19201600 meters plus shipping Send Complete descriptive literature price list a4c7e49c 68 Morgan Ave DanbUry CT 06810 TEL203 743-3312