IIEJGeorge M Myers OBSERVE THE great writer has re placed engine hi Cutlass now rudder servo wont work George Hmmm. time turn receiver servo runs way left stops Could con trol knob has come loose transmitter single stick type means rudder control twist-knob top stick set screw knob grips shaft potentiometer screw loosens center position rudder servo will change Check Its tight Try something else Maybe servo fault Lets ex change rudder elevator servo plugs trouble must receiver cause now elevator jams full down Jumping conclusions men tal exercise some people get keep reminding myself thing know sure rudder servo works OK elevator channel also know servos plugged aileron elevator channels work nor mally although little jittery trouble either transmitter receiver decide defective easiest way would try run receiver another transmitter another transmitter can get out oscilloscope start looking wave forms thats already another project Lets turn everything off think little rudder servo chance plugged landing gear receptacle Lets turn again see Now wait minute servos moving havent turned transmitter yet Tim what doing Nothing much Dad just fitting Cox/Sanwa 2-channel Hobie Hawk Thats same frequency Proline Ive going nuts here.. Gee Dad Im sorry didnt think would need frequency pin own bedroom Now know what happened lets try figure out happened Refer ring Fig 1 taken last months column see first two pulses both transmitter pulse streams aileron elevator significant difference third pulse Note Proline third pulse rudder Cox/Sanwa reset Reset very long pulse Proline servo responds long pulses moving left down low motor flaps landing gear Since pulse long enough also re sets decoder position 1 since nominal pulse width neutral both systems about 15 milliseconds servos stay neutral jitter little respond first other transmitter have mentioned Cox/Sanwa Model 8020 2-channel radio several times column cheap powerful generally good performer Due price extensive merchandising effort ginners buying set Several students have bought come familiar its characteristics First use Hobby Lobby Shoestring see June 1977 issue page 10 plane lasted six flights lost 12 Model Aviation Cox/Sanwa model 80322 servo broken down its component parts square items next servo motor file card spacers top servo Just read Georges discussion Seen World Championships Krafts new KPS-18 servo shown 6-oz flight pack Size may compared dime appears lower left photograph controls acted sticky last flight Since fitted bent-wire control mix er blamed crash modification tossed system shelf fur ther study rainy day Meanwhile students spiral dived ground 300 feet gliding landing spiral lasted long enough grab box try correct Again student complained controls got sticky engine quit Mark Waite AMA 28903 dismantled servos got home reported presence piece plastic jammed metal s photo shows Cox/Sanwa 80322 silver label servo broken down its component parts Both us observed 80322 servo sticky Both us 80321 gold label servos gave no trouble began get sus picious make long story short both found top plastic servo box marked 1 surface neath gears 2 box good servo have remove top servo case gears see number also found case marked 1 apparently shrunk little since manufacture As result servo-motor open-frame type RESETAE LRESET 1971 PRO 51 TON 8 ST SRESET 77Th RESE LOOKS LIKS LOEG PULSE TO THE STIRRER SERVO ABOVE 7SET 1977 COX/SANVIA Model 8020 Fig 1 Coincidence pulses posed puzzler troubleshooting George describes Find problem dont jump conclusions message ion surface identifies shrinker 7 7000 7 7 7 7 II 7 // 7/ / 4K // / 0 / Add spacer / 7 7 / 7Motorgoeshere -H H Trim edge amplifier board Fig 2 Some fixes shrinkage servo cases between top main box servo case can seen photo Cox/Sanwa just inside bend wire spacers cut ordi nary 3 X 5 file card total thickness 014 inch spacers fitted top case no longer pinched gears inside like found Mattel Hot Wheels car gets jammed pressure plastic partition divides servomotor servo-amplifier fix worked us file little off servo-amplifier board Fig 2 Reassembling servo found yet another problem Due shrinkage necessary fabricate spacer go Continued page 80 7 October 1977 13 Gothas coming Two Sweessixteens fly close formation Kits Sharon Enterprises Quadra-powered Thunderbird isa could 1/4-scale category Span 80 in. weight 18 lbs servo aileron rudder elevator servos tail no pushrod longer 6 Does maneuvers Colored jell-coated fuse cowl available R Shettler Ent TALK TO SOMEONE WHO u THE RC HELl EXPERTS AT SC MODELERS Its nice know can get right answers Hell problems Because dont know about us could call hobby shops day long never get off ground SC Modelers have people know about building flying RC Helicopters anybody Weve built Weve flown Weve chalked up much flying time some big chooper pilots Most important thoughwe know make expertise avail able you have ask us So next time want make choice about HC Hell Kit stumped assembly prob lem ed repair re place part lk someone knows Si new helicopter catalog & parts list simultaneously last down wins Awards SAM Champs pre sented annual banquet may have heard heated discussions cen tering around Great Engine Contro versy R/C taking over SAM losing sight Preamble Constitution gala affair good times fellowship prevail hundred thirty three competitors plus family members cheered applauded Free/ Flight Radio/Control fliers alike gorgeous trophies merchandise awards handed out New special awards Electric Power Twin Pushers beau tiful handcrafted art trophy Don Jenk ins Indianapolis high time De Long 30 added already impressive hardware table 1130 heat will soon forgotten Comradeship competiton anl associ ation great bunch people will long remembered H elicopters/Schoonard continued page 25 SC MODELER HOBBY SHOP Hells Planes Cars Boats Radios Parts RC Hobbyists 1999 Larkin Avenue Elgin Illinois 60120 Dept 132312-697-37374 hobby industry has come largest prestig ious meets country Hopefully R/C helicopters will regular part AMA Nationals future flying trying hard enough Walt Schoonard 2080 Sharon Rd Winter Park FL 32789 RC Technique/Myers continued page 13 have sets might good idea check problems make necessary fixes before need becomes critical Check binding servo moving control sticks very slowly end-to-end travel servo hesitates anywhere find out save plane shrinkage plastic may continue forever check regularly Plastics peculiar Very slight changes formulation temperatures used molding give rise longterm shrinkage problems can hap pen manufacturer Temperature cycling move cool cellar very hot trunk car sum mer accelerates rate shrinkage George Myers 70 Froehlich Farm Rd Hicksville NY 11801 Letters Editor continued page 5 van Swaay listing MA chartered clubs Kansas understanding cur rent equipment can converted manufacturer 27 MHz 72 MHz product review product review product review Power Pacer New nicad tester/charger/cycler helps prevent crashes due battery failure Power Pacer will spot weak battery dead cell reversed cell inter mittently working/failing cell giving di rect reading total capacity receiver transmitter nicads Reads actual battery capacity directly milliamphere hours mahl compared manufacturers rated mah best indication battery condi tion As charger controls input 50-mah rate making safe lf nicads inadver tently left charge extended period time As cycler eliminates memory may have occurred prevents memory build-up Can calculate models average mah usage Available popular brand systems including Pro-Line new Kraft 4-channel Specify make model radio Price $5995 California residents add 6% sales tax L R Taylor & Co 10711 Baile Ave Chatsworth CA 91311 dangerous should eliminated competition safety point view disappointing thing about whole contest low turnout 23 contestants takes same ef fort expense put meet 23 does 123 con testants dont enter have give massive amounts merchandise induce contestants come am dead set against reasons stop Second its fair hobby shops retailers give merchandise few contest ants Proof Tangerine directed 7 years row no help 80 Model Aviation product review product review product review Tim Myers Hobie Hawk left hand culprit innocently figured Pas desperate servo troubleshooting Tim can build dad figures can too
Edition: Model Aviation - 1977/10
Page Numbers: 12, 13, 80
IIEJGeorge M Myers OBSERVE THE great writer has re placed engine hi Cutlass now rudder servo wont work George Hmmm. time turn receiver servo runs way left stops Could con trol knob has come loose transmitter single stick type means rudder control twist-knob top stick set screw knob grips shaft potentiometer screw loosens center position rudder servo will change Check Its tight Try something else Maybe servo fault Lets ex change rudder elevator servo plugs trouble must receiver cause now elevator jams full down Jumping conclusions men tal exercise some people get keep reminding myself thing know sure rudder servo works OK elevator channel also know servos plugged aileron elevator channels work nor mally although little jittery trouble either transmitter receiver decide defective easiest way would try run receiver another transmitter another transmitter can get out oscilloscope start looking wave forms thats already another project Lets turn everything off think little rudder servo chance plugged landing gear receptacle Lets turn again see Now wait minute servos moving havent turned transmitter yet Tim what doing Nothing much Dad just fitting Cox/Sanwa 2-channel Hobie Hawk Thats same frequency Proline Ive going nuts here.. Gee Dad Im sorry didnt think would need frequency pin own bedroom Now know what happened lets try figure out happened Refer ring Fig 1 taken last months column see first two pulses both transmitter pulse streams aileron elevator significant difference third pulse Note Proline third pulse rudder Cox/Sanwa reset Reset very long pulse Proline servo responds long pulses moving left down low motor flaps landing gear Since pulse long enough also re sets decoder position 1 since nominal pulse width neutral both systems about 15 milliseconds servos stay neutral jitter little respond first other transmitter have mentioned Cox/Sanwa Model 8020 2-channel radio several times column cheap powerful generally good performer Due price extensive merchandising effort ginners buying set Several students have bought come familiar its characteristics First use Hobby Lobby Shoestring see June 1977 issue page 10 plane lasted six flights lost 12 Model Aviation Cox/Sanwa model 80322 servo broken down its component parts square items next servo motor file card spacers top servo Just read Georges discussion Seen World Championships Krafts new KPS-18 servo shown 6-oz flight pack Size may compared dime appears lower left photograph controls acted sticky last flight Since fitted bent-wire control mix er blamed crash modification tossed system shelf fur ther study rainy day Meanwhile students spiral dived ground 300 feet gliding landing spiral lasted long enough grab box try correct Again student complained controls got sticky engine quit Mark Waite AMA 28903 dismantled servos got home reported presence piece plastic jammed metal s photo shows Cox/Sanwa 80322 silver label servo broken down its component parts Both us observed 80322 servo sticky Both us 80321 gold label servos gave no trouble began get sus picious make long story short both found top plastic servo box marked 1 surface neath gears 2 box good servo have remove top servo case gears see number also found case marked 1 apparently shrunk little since manufacture As result servo-motor open-frame type RESETAE LRESET 1971 PRO 51 TON 8 ST SRESET 77Th RESE LOOKS LIKS LOEG PULSE TO THE STIRRER SERVO ABOVE 7SET 1977 COX/SANVIA Model 8020 Fig 1 Coincidence pulses posed puzzler troubleshooting George describes Find problem dont jump conclusions message ion surface identifies shrinker 7 7000 7 7 7 7 II 7 // 7/ / 4K // / 0 / Add spacer / 7 7 / 7Motorgoeshere -H H Trim edge amplifier board Fig 2 Some fixes shrinkage servo cases between top main box servo case can seen photo Cox/Sanwa just inside bend wire spacers cut ordi nary 3 X 5 file card total thickness 014 inch spacers fitted top case no longer pinched gears inside like found Mattel Hot Wheels car gets jammed pressure plastic partition divides servomotor servo-amplifier fix worked us file little off servo-amplifier board Fig 2 Reassembling servo found yet another problem Due shrinkage necessary fabricate spacer go Continued page 80 7 October 1977 13 Gothas coming Two Sweessixteens fly close formation Kits Sharon Enterprises Quadra-powered Thunderbird isa could 1/4-scale category Span 80 in. weight 18 lbs servo aileron rudder elevator servos tail no pushrod longer 6 Does maneuvers Colored jell-coated fuse cowl available R Shettler Ent TALK TO SOMEONE WHO u THE RC HELl EXPERTS AT SC MODELERS Its nice know can get right answers Hell problems Because dont know about us could call hobby shops day long never get off ground SC Modelers have people know about building flying RC Helicopters anybody Weve built Weve flown Weve chalked up much flying time some big chooper pilots Most important thoughwe know make expertise avail able you have ask us So next time want make choice about HC Hell Kit stumped assembly prob lem ed repair re place part lk someone knows Si new helicopter catalog & parts list simultaneously last down wins Awards SAM Champs pre sented annual banquet may have heard heated discussions cen tering around Great Engine Contro versy R/C taking over SAM losing sight Preamble Constitution gala affair good times fellowship prevail hundred thirty three competitors plus family members cheered applauded Free/ Flight Radio/Control fliers alike gorgeous trophies merchandise awards handed out New special awards Electric Power Twin Pushers beau tiful handcrafted art trophy Don Jenk ins Indianapolis high time De Long 30 added already impressive hardware table 1130 heat will soon forgotten Comradeship competiton anl associ ation great bunch people will long remembered H elicopters/Schoonard continued page 25 SC MODELER HOBBY SHOP Hells Planes Cars Boats Radios Parts RC Hobbyists 1999 Larkin Avenue Elgin Illinois 60120 Dept 132312-697-37374 hobby industry has come largest prestig ious meets country Hopefully R/C helicopters will regular part AMA Nationals future flying trying hard enough Walt Schoonard 2080 Sharon Rd Winter Park FL 32789 RC Technique/Myers continued page 13 have sets might good idea check problems make necessary fixes before need becomes critical Check binding servo moving control sticks very slowly end-to-end travel servo hesitates anywhere find out save plane shrinkage plastic may continue forever check regularly Plastics peculiar Very slight changes formulation temperatures used molding give rise longterm shrinkage problems can hap pen manufacturer Temperature cycling move cool cellar very hot trunk car sum mer accelerates rate shrinkage George Myers 70 Froehlich Farm Rd Hicksville NY 11801 Letters Editor continued page 5 van Swaay listing MA chartered clubs Kansas understanding cur rent equipment can converted manufacturer 27 MHz 72 MHz product review product review product review Power Pacer New nicad tester/charger/cycler helps prevent crashes due battery failure Power Pacer will spot weak battery dead cell reversed cell inter mittently working/failing cell giving di rect reading total capacity receiver transmitter nicads Reads actual battery capacity directly milliamphere hours mahl compared manufacturers rated mah best indication battery condi tion As charger controls input 50-mah rate making safe lf nicads inadver tently left charge extended period time As cycler eliminates memory may have occurred prevents memory build-up Can calculate models average mah usage Available popular brand systems including Pro-Line new Kraft 4-channel Specify make model radio Price $5995 California residents add 6% sales tax L R Taylor & Co 10711 Baile Ave Chatsworth CA 91311 dangerous should eliminated competition safety point view disappointing thing about whole contest low turnout 23 contestants takes same ef fort expense put meet 23 does 123 con testants dont enter have give massive amounts merchandise induce contestants come am dead set against reasons stop Second its fair hobby shops retailers give merchandise few contest ants Proof Tangerine directed 7 years row no help 80 Model Aviation product review product review product review Tim Myers Hobie Hawk left hand culprit innocently figured Pas desperate servo troubleshooting Tim can build dad figures can too
Edition: Model Aviation - 1977/10
Page Numbers: 12, 13, 80
IIEJGeorge M Myers OBSERVE THE great writer has re placed engine hi Cutlass now rudder servo wont work George Hmmm. time turn receiver servo runs way left stops Could con trol knob has come loose transmitter single stick type means rudder control twist-knob top stick set screw knob grips shaft potentiometer screw loosens center position rudder servo will change Check Its tight Try something else Maybe servo fault Lets ex change rudder elevator servo plugs trouble must receiver cause now elevator jams full down Jumping conclusions men tal exercise some people get keep reminding myself thing know sure rudder servo works OK elevator channel also know servos plugged aileron elevator channels work nor mally although little jittery trouble either transmitter receiver decide defective easiest way would try run receiver another transmitter another transmitter can get out oscilloscope start looking wave forms thats already another project Lets turn everything off think little rudder servo chance plugged landing gear receptacle Lets turn again see Now wait minute servos moving havent turned transmitter yet Tim what doing Nothing much Dad just fitting Cox/Sanwa 2-channel Hobie Hawk Thats same frequency Proline Ive going nuts here.. Gee Dad Im sorry didnt think would need frequency pin own bedroom Now know what happened lets try figure out happened Refer ring Fig 1 taken last months column see first two pulses both transmitter pulse streams aileron elevator significant difference third pulse Note Proline third pulse rudder Cox/Sanwa reset Reset very long pulse Proline servo responds long pulses moving left down low motor flaps landing gear Since pulse long enough also re sets decoder position 1 since nominal pulse width neutral both systems about 15 milliseconds servos stay neutral jitter little respond first other transmitter have mentioned Cox/Sanwa Model 8020 2-channel radio several times column cheap powerful generally good performer Due price extensive merchandising effort ginners buying set Several students have bought come familiar its characteristics First use Hobby Lobby Shoestring see June 1977 issue page 10 plane lasted six flights lost 12 Model Aviation Cox/Sanwa model 80322 servo broken down its component parts square items next servo motor file card spacers top servo Just read Georges discussion Seen World Championships Krafts new KPS-18 servo shown 6-oz flight pack Size may compared dime appears lower left photograph controls acted sticky last flight Since fitted bent-wire control mix er blamed crash modification tossed system shelf fur ther study rainy day Meanwhile students spiral dived ground 300 feet gliding landing spiral lasted long enough grab box try correct Again student complained controls got sticky engine quit Mark Waite AMA 28903 dismantled servos got home reported presence piece plastic jammed metal s photo shows Cox/Sanwa 80322 silver label servo broken down its component parts Both us observed 80322 servo sticky Both us 80321 gold label servos gave no trouble began get sus picious make long story short both found top plastic servo box marked 1 surface neath gears 2 box good servo have remove top servo case gears see number also found case marked 1 apparently shrunk little since manufacture As result servo-motor open-frame type RESETAE LRESET 1971 PRO 51 TON 8 ST SRESET 77Th RESE LOOKS LIKS LOEG PULSE TO THE STIRRER SERVO ABOVE 7SET 1977 COX/SANVIA Model 8020 Fig 1 Coincidence pulses posed puzzler troubleshooting George describes Find problem dont jump conclusions message ion surface identifies shrinker 7 7000 7 7 7 7 II 7 // 7/ / 4K // / 0 / Add spacer / 7 7 / 7Motorgoeshere -H H Trim edge amplifier board Fig 2 Some fixes shrinkage servo cases between top main box servo case can seen photo Cox/Sanwa just inside bend wire spacers cut ordi nary 3 X 5 file card total thickness 014 inch spacers fitted top case no longer pinched gears inside like found Mattel Hot Wheels car gets jammed pressure plastic partition divides servomotor servo-amplifier fix worked us file little off servo-amplifier board Fig 2 Reassembling servo found yet another problem Due shrinkage necessary fabricate spacer go Continued page 80 7 October 1977 13 Gothas coming Two Sweessixteens fly close formation Kits Sharon Enterprises Quadra-powered Thunderbird isa could 1/4-scale category Span 80 in. weight 18 lbs servo aileron rudder elevator servos tail no pushrod longer 6 Does maneuvers Colored jell-coated fuse cowl available R Shettler Ent TALK TO SOMEONE WHO u THE RC HELl EXPERTS AT SC MODELERS Its nice know can get right answers Hell problems Because dont know about us could call hobby shops day long never get off ground SC Modelers have people know about building flying RC Helicopters anybody Weve built Weve flown Weve chalked up much flying time some big chooper pilots Most important thoughwe know make expertise avail able you have ask us So next time want make choice about HC Hell Kit stumped assembly prob lem ed repair re place part lk someone knows Si new helicopter catalog & parts list simultaneously last down wins Awards SAM Champs pre sented annual banquet may have heard heated discussions cen tering around Great Engine Contro versy R/C taking over SAM losing sight Preamble Constitution gala affair good times fellowship prevail hundred thirty three competitors plus family members cheered applauded Free/ Flight Radio/Control fliers alike gorgeous trophies merchandise awards handed out New special awards Electric Power Twin Pushers beau tiful handcrafted art trophy Don Jenk ins Indianapolis high time De Long 30 added already impressive hardware table 1130 heat will soon forgotten Comradeship competiton anl associ ation great bunch people will long remembered H elicopters/Schoonard continued page 25 SC MODELER HOBBY SHOP Hells Planes Cars Boats Radios Parts RC Hobbyists 1999 Larkin Avenue Elgin Illinois 60120 Dept 132312-697-37374 hobby industry has come largest prestig ious meets country Hopefully R/C helicopters will regular part AMA Nationals future flying trying hard enough Walt Schoonard 2080 Sharon Rd Winter Park FL 32789 RC Technique/Myers continued page 13 have sets might good idea check problems make necessary fixes before need becomes critical Check binding servo moving control sticks very slowly end-to-end travel servo hesitates anywhere find out save plane shrinkage plastic may continue forever check regularly Plastics peculiar Very slight changes formulation temperatures used molding give rise longterm shrinkage problems can hap pen manufacturer Temperature cycling move cool cellar very hot trunk car sum mer accelerates rate shrinkage George Myers 70 Froehlich Farm Rd Hicksville NY 11801 Letters Editor continued page 5 van Swaay listing MA chartered clubs Kansas understanding cur rent equipment can converted manufacturer 27 MHz 72 MHz product review product review product review Power Pacer New nicad tester/charger/cycler helps prevent crashes due battery failure Power Pacer will spot weak battery dead cell reversed cell inter mittently working/failing cell giving di rect reading total capacity receiver transmitter nicads Reads actual battery capacity directly milliamphere hours mahl compared manufacturers rated mah best indication battery condi tion As charger controls input 50-mah rate making safe lf nicads inadver tently left charge extended period time As cycler eliminates memory may have occurred prevents memory build-up Can calculate models average mah usage Available popular brand systems including Pro-Line new Kraft 4-channel Specify make model radio Price $5995 California residents add 6% sales tax L R Taylor & Co 10711 Baile Ave Chatsworth CA 91311 dangerous should eliminated competition safety point view disappointing thing about whole contest low turnout 23 contestants takes same ef fort expense put meet 23 does 123 con testants dont enter have give massive amounts merchandise induce contestants come am dead set against reasons stop Second its fair hobby shops retailers give merchandise few contest ants Proof Tangerine directed 7 years row no help 80 Model Aviation product review product review product review Tim Myers Hobie Hawk left hand culprit innocently figured Pas desperate servo troubleshooting Tim can build dad figures can too