Control Line Scale Bill Boss GEAR DRIVE UNITFrom time time need device turn ing turrets operating bomb bay doors new bomber model performing some other operational function does require very high degree torque Warren Truppner Queens Village NY suggests item used quite often advertising purposes store windows can easily converted use Scale models units Truppner speaks battery-operated three volts used turning store window turntables other advertisements requiring some sort motion attract customers attention units depending type dis play used have various output shaft rpms revolutions per minute output shaft speeds units have seen low rpm high 115 rpm units suited use would likely low range perhaps six rpm would great units could used models specially-designed low-current motors found units generally revers ible easily stopped under load conditions Therefore need conversion type motor can handle reasonable load direc tion reversible accompanying photos show conversion such unit manufactured Hankscraft Co Reedsburg WI Photo such unit complete its battery holder two D-size cells would used display has shaft output six rpm Photo B shows unit stripped its bat tery holder plastic casing motor field coil Photo C shows converted unit replacement motor installed first step conversion remove battery case twisting off two batteryonnection lugs be*tom unit units plastic housing removed filing off large eyelets center either side units top seen photo eyelets removed pull off plastic housing remove original motor field winding lifting off unit shown photo B next step remove original motor armature contacts pair long-nose pliers carefully spring away armature brass armaturemounting plate see photo B armature can lifted out unit very careful during operation Continued page 161 64 Model Aviation American Airlines Fiagship Texas DC-3 Bili Reynolds Caidweli NJ took 3rd 85 Nats 1st Garden State Circie Burners Annual Scale Raiiy deveioped Royai kit weighs 1OA ib uses twin 0845 FSR ABC engines Wingspan 83s Note some scale detailing ground photo props skin pansislrivets Special prolOct month gear-drive unit special scale operations like opening closing bomb bay doors revolving turret etc Theres iengthy discussion coiumn Photo-A shows commerciai store advertising-display drive unit wiii victim conversion Photo-B shows gear train exposed Photo-C shows finished conversion new highertorque motor instailed Units avaliabie great variety gear ratios ABOUT TIME No Battery ord harger F Wind 4 BUMP Engine I 1 WIL$I Dealer lnq Invited 921 12th St NE ITS SPRING POWERED TART F7Ie Jamestown North Dakota 58401 701 2521092 LA Ca. cI received very unusual letter Pettit Paint Company makers Hobbypoxy want share partly because ex hibits candor sense humor normally found dealing manu facturers letter said developed Fast Fill almost year ago sent samples guys write magazines asking give try let us know what thought Most didnt answer did told us no uncertain terms thought Fast Fill too darn hard sand So went back guys lab chained benches told ever wanted see wives children again theyd bet ter come up Fast Fill also fast sand Well took did come up new formula improved Fast Fill hope will meet approval Please give try please let us know like Hobbypoxy dedicat ed turning out high-quality products rely experts like tell us doing So tell us listen Please send replies attention Sincerely Kenneth K Williams Jr Hob bypoxy Sales Manager 36 Pine Street PO Box 378 Borough Rockaway NJ 07866 Well never got old Fast Fill last year did get new formula tried did fine job filling grain balsa fuselage ever-underconstruction Curare new product does sand nicely results smooth paintable finish after two coats object obnoxious fumes some finishing products will pleased hear smell Fast Fill has unusual objectionable odor like Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32569 CL Scale/Boss Continued page 64 loosen bend brass plate have bent plate slightly now time carefully straighten out armature out unit remove armature shaft contact pin pair pliers twisting pulling little effort may required remove pins After pins have extracted remove motor gear tap ping non-beveled side hammer drift pin Set motor gear aside until ready installation new motor contact assembly removed pulling off brass plate now ready select install replacement motor Almost motor sold hobby stores hobbyist electric motor used toys small tape recorders will Most will run 15-6 volts will provide sufficient power pur poses voltage range Please assure choosing motor shaft A-in long proper mounting motor gear shown photos B C motor Mabuchi RM-170 shown photo C chosen because its front brass bearing-mount made mount ing motor soldering brass armature-mounting plate mentioned earlier very easy task Before motor can mounted couple things must done First determine new motors shaft diameter enlarge old arma ture mounting-hole brass plate accept new motor-shaft freely Next hole motor gear must sized enlarged drilling gear will have pressed onto new motors shaft means hole will have made thousandth inch two smaller new motors shaft Careful measurements choice drill size will required gear hole properly enlarged slip motor shaft through hole brass mounting plate press gear required complete lit tle project center motor being sure gear meshes freely larger gear fasten place As can see motor photo C sol dered brass plate motor chosen does have brass bearingmount slow-curing epoxy glues can used quite successfully holding place completed unit weighs ly 35 ounces no attempt has made show electrical hookups unit example can found July 1984 column detailed use rotary switch turn lighting on/off open close bomb bay doors unit such detailed above one-rpm output used operate bomb bay door mechanism shown photos column use put such unit limited imagination willingness tackle project Mini-contest reportLast month paid tribute Bill Force Sweetwater NJ efforts getting Scale competition started southern New Jersey month would like move North bit congratulate George Gaydos Elm wood Park NJ efforts Garden State Circle Burners Annual Scale Rally held Bendix Corp parking field Teterboro Airport NJ meet held September 22 1985 offered competition CL Preci sion Sport GSCB Profile Scale events 25 models display 19 entered competition seems year number Scale modelers really full-blown competition bring models display purposes list winners three events reads like 85 Nats results names like Sam Abdow Bill Reynolds Reuben Stephen McBride Bill Force myself meeting winners circle Once again congratulations George Gaydos GSCB club Bendix Corporation putting great CL Scale meet within reasonable distance Teterboro did make 1985 meet watch Scale Rally listing 1986 contest calendar usual April 1986 161 BUMPSTART Eliminates Embarassing Walk Back Flite Box LICK nce 3495 US Check Allow Time MO Postage Paid ND Rae Aced 4% Tax responding advertisers mention I read about ModelAviation aster FACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE ly September sure attend Lets keep CL Scale alive well Hint workshopRonald L Cahn MD writes Wing T1os newslet ter Mid-Hudson Modelmasters like get something nothing especially true something becomes useful valu able aid nothing would other wise irrelevant junk suggestion use plastic cover caps come shaving cream hairspray cans other similar items perfect mixing holding polyester resin and/or micro-balloons mixtures Once cured residual material left cup can removed easily simply bending deforming sides causing hardened brittle resin microballoons mixture crack fall out cleanly leaving cover ready reuse Doctor Caha goes say caps come variety sizes suit dif ferent jobs has used molds cast piece solid microballoons later carving specific shape small plastic film cans such Kodak film suit same purpose can used small jobs word caution plastic caps can used stated purpose possible come across cap suited mixing resins microballoons mixtures Before using cap large batch resin etc test small amount intended mixture sure compatible mixture Send photos building tips contest reports other items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 FF Duration/Murphy Continued page 73 air fuel stroke because air dense Gill offers few additional opinions effect new high-powered engines placed models orig inally designed less-powerful engines have caused similar problems particularly AMA gas categories FAI fliers real ly havent felt problem too much because have weight spare everything gets planked anyway Also feels really hot ships easier fly sport stuff once get technical problems ironed out because hot stuff seems ignore gravity bores hole whatever direction throw Finally Gil makes astute observation future should expect greater ad vancements AMA gas categories compared FAI AMA categories unlimited free design restric tions Watch ItI alternate-month FF Dura tion co-author Bob Meuser sent an guished note proclaimed abject sorrow having allowed bit erroneous information creep March column mentioned page 147 some copies old NFFS Sympo Report available should have 1971 edition 1981 Shall let him off hook favor say Aye Elfin Edge Society Antique Modelers SAM requires gas-powered competition models meet minimum weight requirement eight ounces per square foot wing area would nor mally include ignition engine model itself necessary ignition ac cessories coil condenser batteries wir ing etc Since ignition paraphernalia runs about constant five ounces no matter model small Class large Class B C generally much easier build Class B C model weight minimums keep Class model being overweight because ignition-accessory-to-totalweight ratio much less larger models instance Playboy Senior 800 square inches must weigh minimum 444 ounces regardless ignition powerplant utilized five-ounce igni tion system about / total weight However 280-to-360-squareinch Class models minimum HO8BYKIDAWAYHOEBYKIOEAWAYHOB8YHDEAWAYHOBBYHIDEAwAy FAMOUS BRITISH DIESELS AEROMODELLER SPARES FC M/E PAW D/C 3rd PRINTING PLANS LOG-DIESEL HANDBOOK pp 5 HOBBY HIDE WAY DELAVANIL 309 244-7389 61734 5 HOBBYHIDEAWAYHOBBYHIDEAWAYHOB8YHIDEAWAYI-IO9RYHIDEAW weight ranges within 155 20 ounces respectively effect five-ounce ig nition system like third quarter models total weight Obviously method insure Class model does tip scales excess use diesel engine forego added weight five-ounce igni tion system Diesels offer other advan tages well run constant speed experience unpredictable ills associated ignition systems thereby offering consistent flights major disadvantage diesels SAM usage date has eligible too difficult findthat until now Dunham Engineering England recent ly began offering reproduction fine Elfin 249cc diesel original Elfins quite popular late ties Dunhams current replica effort has deemed Old-Timer-eligible SAMs engine-approval committee Bruce Augustus won Class Pylon event 85 SAM Champs using Elfin 249cc Playboy Junior attest engines contest capability Should having overweight difficulties Class Old-Timer models might interested diesel alternative US Elfin distributor Dunham Strieglers R/C Supply 5831 McKnight Houston TX 77035 713-729-5652 list $75 plus $4 postage handling Three-volt booster batteries indi vidual approaches some things hobby never seem change ofttimes traditional ritual nature though effective alternatives may available typical example annual practice replacing two 1 A-volt No 6 dry cells wired series serve 3-volt booster battery system starting ignition engines years procedure spring deposit old batteries family trash can regardless condi tion promptly check out local hardware stores fresh replacements recent years replacements creasingly difficult findplus 162 Model Aviation DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 314 221-8803 DeHAVILLAND BEAVER GIANT SCALE 96 4 CYCLE 90-120 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKONNWST 566 Auburn WA 98071 ox 206 941-8248
Edition: Model Aviation - 1986/04
Page Numbers: 64, 161, 162
Control Line Scale Bill Boss GEAR DRIVE UNITFrom time time need device turn ing turrets operating bomb bay doors new bomber model performing some other operational function does require very high degree torque Warren Truppner Queens Village NY suggests item used quite often advertising purposes store windows can easily converted use Scale models units Truppner speaks battery-operated three volts used turning store window turntables other advertisements requiring some sort motion attract customers attention units depending type dis play used have various output shaft rpms revolutions per minute output shaft speeds units have seen low rpm high 115 rpm units suited use would likely low range perhaps six rpm would great units could used models specially-designed low-current motors found units generally revers ible easily stopped under load conditions Therefore need conversion type motor can handle reasonable load direc tion reversible accompanying photos show conversion such unit manufactured Hankscraft Co Reedsburg WI Photo such unit complete its battery holder two D-size cells would used display has shaft output six rpm Photo B shows unit stripped its bat tery holder plastic casing motor field coil Photo C shows converted unit replacement motor installed first step conversion remove battery case twisting off two batteryonnection lugs be*tom unit units plastic housing removed filing off large eyelets center either side units top seen photo eyelets removed pull off plastic housing remove original motor field winding lifting off unit shown photo B next step remove original motor armature contacts pair long-nose pliers carefully spring away armature brass armaturemounting plate see photo B armature can lifted out unit very careful during operation Continued page 161 64 Model Aviation American Airlines Fiagship Texas DC-3 Bili Reynolds Caidweli NJ took 3rd 85 Nats 1st Garden State Circie Burners Annual Scale Raiiy deveioped Royai kit weighs 1OA ib uses twin 0845 FSR ABC engines Wingspan 83s Note some scale detailing ground photo props skin pansislrivets Special prolOct month gear-drive unit special scale operations like opening closing bomb bay doors revolving turret etc Theres iengthy discussion coiumn Photo-A shows commerciai store advertising-display drive unit wiii victim conversion Photo-B shows gear train exposed Photo-C shows finished conversion new highertorque motor instailed Units avaliabie great variety gear ratios ABOUT TIME No Battery ord harger F Wind 4 BUMP Engine I 1 WIL$I Dealer lnq Invited 921 12th St NE ITS SPRING POWERED TART F7Ie Jamestown North Dakota 58401 701 2521092 LA Ca. cI received very unusual letter Pettit Paint Company makers Hobbypoxy want share partly because ex hibits candor sense humor normally found dealing manu facturers letter said developed Fast Fill almost year ago sent samples guys write magazines asking give try let us know what thought Most didnt answer did told us no uncertain terms thought Fast Fill too darn hard sand So went back guys lab chained benches told ever wanted see wives children again theyd bet ter come up Fast Fill also fast sand Well took did come up new formula improved Fast Fill hope will meet approval Please give try please let us know like Hobbypoxy dedicat ed turning out high-quality products rely experts like tell us doing So tell us listen Please send replies attention Sincerely Kenneth K Williams Jr Hob bypoxy Sales Manager 36 Pine Street PO Box 378 Borough Rockaway NJ 07866 Well never got old Fast Fill last year did get new formula tried did fine job filling grain balsa fuselage ever-underconstruction Curare new product does sand nicely results smooth paintable finish after two coats object obnoxious fumes some finishing products will pleased hear smell Fast Fill has unusual objectionable odor like Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32569 CL Scale/Boss Continued page 64 loosen bend brass plate have bent plate slightly now time carefully straighten out armature out unit remove armature shaft contact pin pair pliers twisting pulling little effort may required remove pins After pins have extracted remove motor gear tap ping non-beveled side hammer drift pin Set motor gear aside until ready installation new motor contact assembly removed pulling off brass plate now ready select install replacement motor Almost motor sold hobby stores hobbyist electric motor used toys small tape recorders will Most will run 15-6 volts will provide sufficient power pur poses voltage range Please assure choosing motor shaft A-in long proper mounting motor gear shown photos B C motor Mabuchi RM-170 shown photo C chosen because its front brass bearing-mount made mount ing motor soldering brass armature-mounting plate mentioned earlier very easy task Before motor can mounted couple things must done First determine new motors shaft diameter enlarge old arma ture mounting-hole brass plate accept new motor-shaft freely Next hole motor gear must sized enlarged drilling gear will have pressed onto new motors shaft means hole will have made thousandth inch two smaller new motors shaft Careful measurements choice drill size will required gear hole properly enlarged slip motor shaft through hole brass mounting plate press gear required complete lit tle project center motor being sure gear meshes freely larger gear fasten place As can see motor photo C sol dered brass plate motor chosen does have brass bearingmount slow-curing epoxy glues can used quite successfully holding place completed unit weighs ly 35 ounces no attempt has made show electrical hookups unit example can found July 1984 column detailed use rotary switch turn lighting on/off open close bomb bay doors unit such detailed above one-rpm output used operate bomb bay door mechanism shown photos column use put such unit limited imagination willingness tackle project Mini-contest reportLast month paid tribute Bill Force Sweetwater NJ efforts getting Scale competition started southern New Jersey month would like move North bit congratulate George Gaydos Elm wood Park NJ efforts Garden State Circle Burners Annual Scale Rally held Bendix Corp parking field Teterboro Airport NJ meet held September 22 1985 offered competition CL Preci sion Sport GSCB Profile Scale events 25 models display 19 entered competition seems year number Scale modelers really full-blown competition bring models display purposes list winners three events reads like 85 Nats results names like Sam Abdow Bill Reynolds Reuben Stephen McBride Bill Force myself meeting winners circle Once again congratulations George Gaydos GSCB club Bendix Corporation putting great CL Scale meet within reasonable distance Teterboro did make 1985 meet watch Scale Rally listing 1986 contest calendar usual April 1986 161 BUMPSTART Eliminates Embarassing Walk Back Flite Box LICK nce 3495 US Check Allow Time MO Postage Paid ND Rae Aced 4% Tax responding advertisers mention I read about ModelAviation aster FACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE ly September sure attend Lets keep CL Scale alive well Hint workshopRonald L Cahn MD writes Wing T1os newslet ter Mid-Hudson Modelmasters like get something nothing especially true something becomes useful valu able aid nothing would other wise irrelevant junk suggestion use plastic cover caps come shaving cream hairspray cans other similar items perfect mixing holding polyester resin and/or micro-balloons mixtures Once cured residual material left cup can removed easily simply bending deforming sides causing hardened brittle resin microballoons mixture crack fall out cleanly leaving cover ready reuse Doctor Caha goes say caps come variety sizes suit dif ferent jobs has used molds cast piece solid microballoons later carving specific shape small plastic film cans such Kodak film suit same purpose can used small jobs word caution plastic caps can used stated purpose possible come across cap suited mixing resins microballoons mixtures Before using cap large batch resin etc test small amount intended mixture sure compatible mixture Send photos building tips contest reports other items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 FF Duration/Murphy Continued page 73 air fuel stroke because air dense Gill offers few additional opinions effect new high-powered engines placed models orig inally designed less-powerful engines have caused similar problems particularly AMA gas categories FAI fliers real ly havent felt problem too much because have weight spare everything gets planked anyway Also feels really hot ships easier fly sport stuff once get technical problems ironed out because hot stuff seems ignore gravity bores hole whatever direction throw Finally Gil makes astute observation future should expect greater ad vancements AMA gas categories compared FAI AMA categories unlimited free design restric tions Watch ItI alternate-month FF Dura tion co-author Bob Meuser sent an guished note proclaimed abject sorrow having allowed bit erroneous information creep March column mentioned page 147 some copies old NFFS Sympo Report available should have 1971 edition 1981 Shall let him off hook favor say Aye Elfin Edge Society Antique Modelers SAM requires gas-powered competition models meet minimum weight requirement eight ounces per square foot wing area would nor mally include ignition engine model itself necessary ignition ac cessories coil condenser batteries wir ing etc Since ignition paraphernalia runs about constant five ounces no matter model small Class large Class B C generally much easier build Class B C model weight minimums keep Class model being overweight because ignition-accessory-to-totalweight ratio much less larger models instance Playboy Senior 800 square inches must weigh minimum 444 ounces regardless ignition powerplant utilized five-ounce igni tion system about / total weight However 280-to-360-squareinch Class models minimum HO8BYKIDAWAYHOEBYKIOEAWAYHOB8YHDEAWAYHOBBYHIDEAwAy FAMOUS BRITISH DIESELS AEROMODELLER SPARES FC M/E PAW D/C 3rd PRINTING PLANS LOG-DIESEL HANDBOOK pp 5 HOBBY HIDE WAY DELAVANIL 309 244-7389 61734 5 HOBBYHIDEAWAYHOBBYHIDEAWAYHOB8YHIDEAWAYI-IO9RYHIDEAW weight ranges within 155 20 ounces respectively effect five-ounce ig nition system like third quarter models total weight Obviously method insure Class model does tip scales excess use diesel engine forego added weight five-ounce igni tion system Diesels offer other advan tages well run constant speed experience unpredictable ills associated ignition systems thereby offering consistent flights major disadvantage diesels SAM usage date has eligible too difficult findthat until now Dunham Engineering England recent ly began offering reproduction fine Elfin 249cc diesel original Elfins quite popular late ties Dunhams current replica effort has deemed Old-Timer-eligible SAMs engine-approval committee Bruce Augustus won Class Pylon event 85 SAM Champs using Elfin 249cc Playboy Junior attest engines contest capability Should having overweight difficulties Class Old-Timer models might interested diesel alternative US Elfin distributor Dunham Strieglers R/C Supply 5831 McKnight Houston TX 77035 713-729-5652 list $75 plus $4 postage handling Three-volt booster batteries indi vidual approaches some things hobby never seem change ofttimes traditional ritual nature though effective alternatives may available typical example annual practice replacing two 1 A-volt No 6 dry cells wired series serve 3-volt booster battery system starting ignition engines years procedure spring deposit old batteries family trash can regardless condi tion promptly check out local hardware stores fresh replacements recent years replacements creasingly difficult findplus 162 Model Aviation DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 314 221-8803 DeHAVILLAND BEAVER GIANT SCALE 96 4 CYCLE 90-120 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKONNWST 566 Auburn WA 98071 ox 206 941-8248
Edition: Model Aviation - 1986/04
Page Numbers: 64, 161, 162
Control Line Scale Bill Boss GEAR DRIVE UNITFrom time time need device turn ing turrets operating bomb bay doors new bomber model performing some other operational function does require very high degree torque Warren Truppner Queens Village NY suggests item used quite often advertising purposes store windows can easily converted use Scale models units Truppner speaks battery-operated three volts used turning store window turntables other advertisements requiring some sort motion attract customers attention units depending type dis play used have various output shaft rpms revolutions per minute output shaft speeds units have seen low rpm high 115 rpm units suited use would likely low range perhaps six rpm would great units could used models specially-designed low-current motors found units generally revers ible easily stopped under load conditions Therefore need conversion type motor can handle reasonable load direc tion reversible accompanying photos show conversion such unit manufactured Hankscraft Co Reedsburg WI Photo such unit complete its battery holder two D-size cells would used display has shaft output six rpm Photo B shows unit stripped its bat tery holder plastic casing motor field coil Photo C shows converted unit replacement motor installed first step conversion remove battery case twisting off two batteryonnection lugs be*tom unit units plastic housing removed filing off large eyelets center either side units top seen photo eyelets removed pull off plastic housing remove original motor field winding lifting off unit shown photo B next step remove original motor armature contacts pair long-nose pliers carefully spring away armature brass armaturemounting plate see photo B armature can lifted out unit very careful during operation Continued page 161 64 Model Aviation American Airlines Fiagship Texas DC-3 Bili Reynolds Caidweli NJ took 3rd 85 Nats 1st Garden State Circie Burners Annual Scale Raiiy deveioped Royai kit weighs 1OA ib uses twin 0845 FSR ABC engines Wingspan 83s Note some scale detailing ground photo props skin pansislrivets Special prolOct month gear-drive unit special scale operations like opening closing bomb bay doors revolving turret etc Theres iengthy discussion coiumn Photo-A shows commerciai store advertising-display drive unit wiii victim conversion Photo-B shows gear train exposed Photo-C shows finished conversion new highertorque motor instailed Units avaliabie great variety gear ratios ABOUT TIME No Battery ord harger F Wind 4 BUMP Engine I 1 WIL$I Dealer lnq Invited 921 12th St NE ITS SPRING POWERED TART F7Ie Jamestown North Dakota 58401 701 2521092 LA Ca. cI received very unusual letter Pettit Paint Company makers Hobbypoxy want share partly because ex hibits candor sense humor normally found dealing manu facturers letter said developed Fast Fill almost year ago sent samples guys write magazines asking give try let us know what thought Most didnt answer did told us no uncertain terms thought Fast Fill too darn hard sand So went back guys lab chained benches told ever wanted see wives children again theyd bet ter come up Fast Fill also fast sand Well took did come up new formula improved Fast Fill hope will meet approval Please give try please let us know like Hobbypoxy dedicat ed turning out high-quality products rely experts like tell us doing So tell us listen Please send replies attention Sincerely Kenneth K Williams Jr Hob bypoxy Sales Manager 36 Pine Street PO Box 378 Borough Rockaway NJ 07866 Well never got old Fast Fill last year did get new formula tried did fine job filling grain balsa fuselage ever-underconstruction Curare new product does sand nicely results smooth paintable finish after two coats object obnoxious fumes some finishing products will pleased hear smell Fast Fill has unusual objectionable odor like Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32569 CL Scale/Boss Continued page 64 loosen bend brass plate have bent plate slightly now time carefully straighten out armature out unit remove armature shaft contact pin pair pliers twisting pulling little effort may required remove pins After pins have extracted remove motor gear tap ping non-beveled side hammer drift pin Set motor gear aside until ready installation new motor contact assembly removed pulling off brass plate now ready select install replacement motor Almost motor sold hobby stores hobbyist electric motor used toys small tape recorders will Most will run 15-6 volts will provide sufficient power pur poses voltage range Please assure choosing motor shaft A-in long proper mounting motor gear shown photos B C motor Mabuchi RM-170 shown photo C chosen because its front brass bearing-mount made mount ing motor soldering brass armature-mounting plate mentioned earlier very easy task Before motor can mounted couple things must done First determine new motors shaft diameter enlarge old arma ture mounting-hole brass plate accept new motor-shaft freely Next hole motor gear must sized enlarged drilling gear will have pressed onto new motors shaft means hole will have made thousandth inch two smaller new motors shaft Careful measurements choice drill size will required gear hole properly enlarged slip motor shaft through hole brass mounting plate press gear required complete lit tle project center motor being sure gear meshes freely larger gear fasten place As can see motor photo C sol dered brass plate motor chosen does have brass bearingmount slow-curing epoxy glues can used quite successfully holding place completed unit weighs ly 35 ounces no attempt has made show electrical hookups unit example can found July 1984 column detailed use rotary switch turn lighting on/off open close bomb bay doors unit such detailed above one-rpm output used operate bomb bay door mechanism shown photos column use put such unit limited imagination willingness tackle project Mini-contest reportLast month paid tribute Bill Force Sweetwater NJ efforts getting Scale competition started southern New Jersey month would like move North bit congratulate George Gaydos Elm wood Park NJ efforts Garden State Circle Burners Annual Scale Rally held Bendix Corp parking field Teterboro Airport NJ meet held September 22 1985 offered competition CL Preci sion Sport GSCB Profile Scale events 25 models display 19 entered competition seems year number Scale modelers really full-blown competition bring models display purposes list winners three events reads like 85 Nats results names like Sam Abdow Bill Reynolds Reuben Stephen McBride Bill Force myself meeting winners circle Once again congratulations George Gaydos GSCB club Bendix Corporation putting great CL Scale meet within reasonable distance Teterboro did make 1985 meet watch Scale Rally listing 1986 contest calendar usual April 1986 161 BUMPSTART Eliminates Embarassing Walk Back Flite Box LICK nce 3495 US Check Allow Time MO Postage Paid ND Rae Aced 4% Tax responding advertisers mention I read about ModelAviation aster FACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE ly September sure attend Lets keep CL Scale alive well Hint workshopRonald L Cahn MD writes Wing T1os newslet ter Mid-Hudson Modelmasters like get something nothing especially true something becomes useful valu able aid nothing would other wise irrelevant junk suggestion use plastic cover caps come shaving cream hairspray cans other similar items perfect mixing holding polyester resin and/or micro-balloons mixtures Once cured residual material left cup can removed easily simply bending deforming sides causing hardened brittle resin microballoons mixture crack fall out cleanly leaving cover ready reuse Doctor Caha goes say caps come variety sizes suit dif ferent jobs has used molds cast piece solid microballoons later carving specific shape small plastic film cans such Kodak film suit same purpose can used small jobs word caution plastic caps can used stated purpose possible come across cap suited mixing resins microballoons mixtures Before using cap large batch resin etc test small amount intended mixture sure compatible mixture Send photos building tips contest reports other items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 FF Duration/Murphy Continued page 73 air fuel stroke because air dense Gill offers few additional opinions effect new high-powered engines placed models orig inally designed less-powerful engines have caused similar problems particularly AMA gas categories FAI fliers real ly havent felt problem too much because have weight spare everything gets planked anyway Also feels really hot ships easier fly sport stuff once get technical problems ironed out because hot stuff seems ignore gravity bores hole whatever direction throw Finally Gil makes astute observation future should expect greater ad vancements AMA gas categories compared FAI AMA categories unlimited free design restric tions Watch ItI alternate-month FF Dura tion co-author Bob Meuser sent an guished note proclaimed abject sorrow having allowed bit erroneous information creep March column mentioned page 147 some copies old NFFS Sympo Report available should have 1971 edition 1981 Shall let him off hook favor say Aye Elfin Edge Society Antique Modelers SAM requires gas-powered competition models meet minimum weight requirement eight ounces per square foot wing area would nor mally include ignition engine model itself necessary ignition ac cessories coil condenser batteries wir ing etc Since ignition paraphernalia runs about constant five ounces no matter model small Class large Class B C generally much easier build Class B C model weight minimums keep Class model being overweight because ignition-accessory-to-totalweight ratio much less larger models instance Playboy Senior 800 square inches must weigh minimum 444 ounces regardless ignition powerplant utilized five-ounce igni tion system about / total weight However 280-to-360-squareinch Class models minimum HO8BYKIDAWAYHOEBYKIOEAWAYHOB8YHDEAWAYHOBBYHIDEAwAy FAMOUS BRITISH DIESELS AEROMODELLER SPARES FC M/E PAW D/C 3rd PRINTING PLANS LOG-DIESEL HANDBOOK pp 5 HOBBY HIDE WAY DELAVANIL 309 244-7389 61734 5 HOBBYHIDEAWAYHOBBYHIDEAWAYHOB8YHIDEAWAYI-IO9RYHIDEAW weight ranges within 155 20 ounces respectively effect five-ounce ig nition system like third quarter models total weight Obviously method insure Class model does tip scales excess use diesel engine forego added weight five-ounce igni tion system Diesels offer other advan tages well run constant speed experience unpredictable ills associated ignition systems thereby offering consistent flights major disadvantage diesels SAM usage date has eligible too difficult findthat until now Dunham Engineering England recent ly began offering reproduction fine Elfin 249cc diesel original Elfins quite popular late ties Dunhams current replica effort has deemed Old-Timer-eligible SAMs engine-approval committee Bruce Augustus won Class Pylon event 85 SAM Champs using Elfin 249cc Playboy Junior attest engines contest capability Should having overweight difficulties Class Old-Timer models might interested diesel alternative US Elfin distributor Dunham Strieglers R/C Supply 5831 McKnight Houston TX 77035 713-729-5652 list $75 plus $4 postage handling Three-volt booster batteries indi vidual approaches some things hobby never seem change ofttimes traditional ritual nature though effective alternatives may available typical example annual practice replacing two 1 A-volt No 6 dry cells wired series serve 3-volt booster battery system starting ignition engines years procedure spring deposit old batteries family trash can regardless condi tion promptly check out local hardware stores fresh replacements recent years replacements creasingly difficult findplus 162 Model Aviation DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 314 221-8803 DeHAVILLAND BEAVER GIANT SCALE 96 4 CYCLE 90-120 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKONNWST 566 Auburn WA 98071 ox 206 941-8248