NO OCR TEXT NO OCR TEXT smooth runway Flying would about same Enya 15 since weonly used full power takeoffs playing Half thxot tie less adequate flying As pictures show well thought out kit goes together rapidly some Sig innovations keep building interesting Although mentioned earlier what could recommended beginners airplane based flying ability Since now seeing more nonbuilder-buy-and-fly RCs flying sites would good kit learning build models can builder pilot course drawback buyand-fly some things go wrong can always blame guy built conversely build-and-fly full responsibility yours alone However Sig does supply 16page comprehensive set building flying instructions including close-up pictures draw ings step-by-step text assist new builder through construction adventure Scamp conglomerate memories real airplanes past also mixture little old new kit depart ment requires skills old cutting shaping balsa new man-made products like foam wing requires special handling compatible paints use plastic coverings matching old-time method using dopetype finishes match new requires little learning choice glues broad requires bit comprehensive planning before kit box hardly open Now dont get us wrong does make better safer models air does require some reading understanding along way fun part We-Fly-Lab can look up rafters see tissue-covered Jetco A-i Silkspan-covered Buzzard bambootissue-covered Zipper some slab-balsa WW combat control-line jobs maverick free-flights some naked old-timerslike Lanzo Playboy just havent gotten around finishingand delightful Cub floats always around aero modeler wants little bit nostalgia new crates methods technological ad vancements also exciting may better cases can sure gutwrenching sometimes find out Some great crates mentioned above cast some pretty long shadows being very objective necessary Scamp compared part whole new generation crates time can pass judgment little quickie fun build gave us chance test Carl Goldbergs new Super Jet instant glue under different circumstances Following instructions recommended applications helped us save lot weight months ago purchased some Du-Bro Control Over-Ride Servo Saver units Because problems throttle linkage past knew needed unique device ready reach have sat shelf during adventures linkage just happened match No matter tried servo throttle arm Scamp just refused synchronization other Throttle re tracts spoilers usually fixed moments throw usually ones keep servo growling proper synchronization cannot achieved supplied linkage Du-Bro unit natural cases help prevent damage servo Although difficult document suspect servo noise caused under over-ride conditions could also cause signal interference may cause erratic 60 Model Aviation toam wlngea oirareauyforthe air ones MRC Enysl5 swinging aTop FliteSuperM prop MonoKote EconoKote used recommended manner help set off Williams Brothers wheel tail-wheel assembly Just love big fillet flows vertical tail Sig uses printed outlines balsa aid bulldlng Inese pans require uutting ply doublers other parts come accurately cut Note safe antenna exit point top cabin control airplane Being safe side keeping parts harmony may save lot repairs Editor Servo overloads boost drain sky-high mistake think terms pounds-pull force things Planning during construction model can help keep ready hit skies soon batteries charged offer good happy outings flying site help achieve durability longevity We-Fly-Lab took some liberties perhaps better original design worth trying plan some stunting did wing must held down securely fresh rubber bands used three side going across wing two direction going diagonally across wingthese put last help hold parallel bands use rubber bands can after few applications start crushing foam therefore added two 1/32 plywood doublers area see pictures Econokoted over fuselage covered MonoKote sealed down very hard around engine cowling area lightly sanded along edge exposed covering wiped alcohol masked ott sprayed four coats Pactra Formula-U polyurethane finish added protection against fuel penetration area added day-glow orange strip wing panel first help balance wing second help regain control airplane should get disoriented air know whether coming going feature has acclaimed through years aid keep trying out never really remember wing put blasted thing So go back old reliable method give little right rudder airplane goes right its going away goes left its headed toward Switching part Scamp question has directed us what doing about battery reliability checking Out system general consider use nickel-cadmium batteries very reliable method used properly abused can hazard crash-costly As pile batteries picture shows We-Fly-Lab has used types did stretch little Some out some portable electronic gear RC does present cross section some types batteries available Before approach some applicable points RC batteries recommended keep current file battery data available data own particular type battery since can vary other should priority collectable pictures second edition handbook put out General Electric good basic reference guide available Ace RIG could best $5 ever spent keeping crates flying Engineering books also good takes lot digging Specification sheets come new batteries cases difficult understand some type basic reference book Especially used radio purchased specification sheets could deceiving plugging charger wall assum ing OK Radio-control units can purchased using primary and/or secondary batteries primary battery like dry battery discharged completely no longer serviceable secondary battery may used repeatedly because chemical reaction can reversed recharged 60s radios such Min-X using Galloping Ghost activators quite common flying site advantageous weight-wise longer flying time use combination primary secondary battery packs airplane Depending funds avail able spend very expensive nickel-cadmium rechargeable batteries trans mitter could powered either type Still because initial expense radio systems can purchased using either type battery Usually primary systems can converted secondary purchase set rechargeable batteries charging unit Usually terms vented sealed batteries refer rechargeable types Vented batteries ones fluid can added because basic construction require vent ilation Sealed batteries also use electrolite require safety vent referred sealed batteries Yes confusing script learn live Probably key remember sealed batteries like use RC vented some manner some sealed batteries small hole visible positive end others use pressure safety cap can eject under pressure leaving small hole both ofthese tvoes nossible under March 1980 61 Harrah report has channels Mississippi Delta chooses wisely can find support equipment aid achieving hundreds reliable flights shown medium priced voltmeter reference books L R Taylor Ace charge discharge units Add George Myers use ammeter detect installation drag causes high servo current drain may avoid trouble forever Scamp course can quite simply flown Rubber- band- mounted styrene wings sometimes need monal support trailing edge pre vent crushing ply doublers held place bags lead shot epoxy sets wing sanded covered EconoKote requires less heat iron shrink MonoKote preferred materiallike Solarfilmfor safe covering over foam too much additional internal pressures caused up greenish corrosion sometimes improper charge discharge start leaking formed flux core solder wrongly used fluid through vent will probably show joining cells though batteries will still take charge much can measured putting battery through controlled discharge recharge discharge using measuring devices such Ace Digipace L C Taylor Co Power Pacer have used both units almost year RC other applications found both functional reliable discard batteries flying have signs leakage reassemble batteries packs general use during radio installation check-outs servo testing ballast checking etc General Electric batteries have unique feature like have incorporated vent opens under pressure automatically recloses years ago uncommon have battery explode Today because new vented methods would require tremendous abuse cause explosion Over-charging wrong amperage high could still cause problems Usually over-charging proper amperage rate will cause loss battery capacity caused loss chemicals through needless venting above test equipment can tell capacity pack items also have methods cut-offs warn something suspect Once warnings received can try recharge discharge cycle see pack will regain proper capacity recommend individual battery checked since reverse weak battery can cause problems other batteries possibly short Out whole pack under right circumstances appears OK General Electric has recommended procedure testing have found quite reliable recommended test procedure sealed cell batteries new prior installation We-FlyLab has used system replacement battery checking cells have either reversed fallen below 10 volt year two old little usage have no indication leakage open vent presented fool-proof test procedure Discard questionable battery flight use new return dealer factory explanation book put out General Electric NickelCadmium Battery Application Engineering Handbook available General Electric Co Battery Business Dept PO Box 861 Gaines ville FL32602 saysSealedcellbatteries normally shipped discharged condition Prior installation nickel-cadmium sealed cells may checked follows 1 Measure open circuit voltage equal greater 1 volt cell acceptable open circuit voltage less 1 0 volt cell may defective may have inadvertently shorted down during shipping handling such driven slightly reverse determine proceed step 2 3 2 open circuit voltage step 1 less 10 volt proceed follows Apply 4C charge 30 seconds b Apply 4C discharge 2 3 seconds c Measure end-of-discharge voltage less 10 volt cell defective equal greater 10 volt perform step 3 Step 2 designed ferret out cells may have low resistance shorts opens quick test will determine cells battery have high resistance shorts step 3 also recommended 3 Test cell has failed step 1 passed step 2c follows Short individual cell 24 hours b Apply 01 C charge 2 minutes Voltage will rise 12 volt c Rest cell 90 minutes open circuited d Measure open circuit voltage 05 volt greater cell acceptable After procedure has completed 62 Model Aviation Hall surtaces printed JI 1 sneet cut outline ana sanded snape Note tnat rudder elevators contoured shape about 1/16 trailing edges Any flight gains marginal weight saved helps hold down wing loading avoids ballasting nose Remember weight tle tail requires about three times much weight nose balance Something about simplicity little 3-channel crate reminded Bob things have gone through reach taken-for-granted point see text batteries repacked cycle battery pack through Digipace Power Pacer least twice technique use item 2 b quite simple good voltmeter necessary read volts amperage resistance 4C 4 x Capacityora45OmAx4 1800 mAorl8A 225 mA would equal 09 500 mA would equal 2A inexpensive AC-DC con verter power supplies market resistors needed discharge cycle standard local electronics supply house battery adventure kind two-headed subject aeromodeling dont want mess phase hobby want know selfassurance safety air We- Fly- Lab cannot make electronics experts can help explore some potentials within reach frugal pocketbook curious minds Caution portion ofthe battery world should applied other types Fast Charge Quick Charge Vented batteries require other special techniques Scamp proved fun model dialogue batteries partial answer key questions asked want send questions will try answer adven tures Letters magniloquent will appraised usually answerable tunately far greater percentage mail comes for-fun sincere constructive aeromodelers Letters can sent direct Robert S Harrah PO Box 99419 San Diego CA 92109
Edition: Model Aviation - 1980/03
Page Numbers: 58, 59, 60, 61, 62, 63
NO OCR TEXT NO OCR TEXT smooth runway Flying would about same Enya 15 since weonly used full power takeoffs playing Half thxot tie less adequate flying As pictures show well thought out kit goes together rapidly some Sig innovations keep building interesting Although mentioned earlier what could recommended beginners airplane based flying ability Since now seeing more nonbuilder-buy-and-fly RCs flying sites would good kit learning build models can builder pilot course drawback buyand-fly some things go wrong can always blame guy built conversely build-and-fly full responsibility yours alone However Sig does supply 16page comprehensive set building flying instructions including close-up pictures draw ings step-by-step text assist new builder through construction adventure Scamp conglomerate memories real airplanes past also mixture little old new kit depart ment requires skills old cutting shaping balsa new man-made products like foam wing requires special handling compatible paints use plastic coverings matching old-time method using dopetype finishes match new requires little learning choice glues broad requires bit comprehensive planning before kit box hardly open Now dont get us wrong does make better safer models air does require some reading understanding along way fun part We-Fly-Lab can look up rafters see tissue-covered Jetco A-i Silkspan-covered Buzzard bambootissue-covered Zipper some slab-balsa WW combat control-line jobs maverick free-flights some naked old-timerslike Lanzo Playboy just havent gotten around finishingand delightful Cub floats always around aero modeler wants little bit nostalgia new crates methods technological ad vancements also exciting may better cases can sure gutwrenching sometimes find out Some great crates mentioned above cast some pretty long shadows being very objective necessary Scamp compared part whole new generation crates time can pass judgment little quickie fun build gave us chance test Carl Goldbergs new Super Jet instant glue under different circumstances Following instructions recommended applications helped us save lot weight months ago purchased some Du-Bro Control Over-Ride Servo Saver units Because problems throttle linkage past knew needed unique device ready reach have sat shelf during adventures linkage just happened match No matter tried servo throttle arm Scamp just refused synchronization other Throttle re tracts spoilers usually fixed moments throw usually ones keep servo growling proper synchronization cannot achieved supplied linkage Du-Bro unit natural cases help prevent damage servo Although difficult document suspect servo noise caused under over-ride conditions could also cause signal interference may cause erratic 60 Model Aviation toam wlngea oirareauyforthe air ones MRC Enysl5 swinging aTop FliteSuperM prop MonoKote EconoKote used recommended manner help set off Williams Brothers wheel tail-wheel assembly Just love big fillet flows vertical tail Sig uses printed outlines balsa aid bulldlng Inese pans require uutting ply doublers other parts come accurately cut Note safe antenna exit point top cabin control airplane Being safe side keeping parts harmony may save lot repairs Editor Servo overloads boost drain sky-high mistake think terms pounds-pull force things Planning during construction model can help keep ready hit skies soon batteries charged offer good happy outings flying site help achieve durability longevity We-Fly-Lab took some liberties perhaps better original design worth trying plan some stunting did wing must held down securely fresh rubber bands used three side going across wing two direction going diagonally across wingthese put last help hold parallel bands use rubber bands can after few applications start crushing foam therefore added two 1/32 plywood doublers area see pictures Econokoted over fuselage covered MonoKote sealed down very hard around engine cowling area lightly sanded along edge exposed covering wiped alcohol masked ott sprayed four coats Pactra Formula-U polyurethane finish added protection against fuel penetration area added day-glow orange strip wing panel first help balance wing second help regain control airplane should get disoriented air know whether coming going feature has acclaimed through years aid keep trying out never really remember wing put blasted thing So go back old reliable method give little right rudder airplane goes right its going away goes left its headed toward Switching part Scamp question has directed us what doing about battery reliability checking Out system general consider use nickel-cadmium batteries very reliable method used properly abused can hazard crash-costly As pile batteries picture shows We-Fly-Lab has used types did stretch little Some out some portable electronic gear RC does present cross section some types batteries available Before approach some applicable points RC batteries recommended keep current file battery data available data own particular type battery since can vary other should priority collectable pictures second edition handbook put out General Electric good basic reference guide available Ace RIG could best $5 ever spent keeping crates flying Engineering books also good takes lot digging Specification sheets come new batteries cases difficult understand some type basic reference book Especially used radio purchased specification sheets could deceiving plugging charger wall assum ing OK Radio-control units can purchased using primary and/or secondary batteries primary battery like dry battery discharged completely no longer serviceable secondary battery may used repeatedly because chemical reaction can reversed recharged 60s radios such Min-X using Galloping Ghost activators quite common flying site advantageous weight-wise longer flying time use combination primary secondary battery packs airplane Depending funds avail able spend very expensive nickel-cadmium rechargeable batteries trans mitter could powered either type Still because initial expense radio systems can purchased using either type battery Usually primary systems can converted secondary purchase set rechargeable batteries charging unit Usually terms vented sealed batteries refer rechargeable types Vented batteries ones fluid can added because basic construction require vent ilation Sealed batteries also use electrolite require safety vent referred sealed batteries Yes confusing script learn live Probably key remember sealed batteries like use RC vented some manner some sealed batteries small hole visible positive end others use pressure safety cap can eject under pressure leaving small hole both ofthese tvoes nossible under March 1980 61 Harrah report has channels Mississippi Delta chooses wisely can find support equipment aid achieving hundreds reliable flights shown medium priced voltmeter reference books L R Taylor Ace charge discharge units Add George Myers use ammeter detect installation drag causes high servo current drain may avoid trouble forever Scamp course can quite simply flown Rubber- band- mounted styrene wings sometimes need monal support trailing edge pre vent crushing ply doublers held place bags lead shot epoxy sets wing sanded covered EconoKote requires less heat iron shrink MonoKote preferred materiallike Solarfilmfor safe covering over foam too much additional internal pressures caused up greenish corrosion sometimes improper charge discharge start leaking formed flux core solder wrongly used fluid through vent will probably show joining cells though batteries will still take charge much can measured putting battery through controlled discharge recharge discharge using measuring devices such Ace Digipace L C Taylor Co Power Pacer have used both units almost year RC other applications found both functional reliable discard batteries flying have signs leakage reassemble batteries packs general use during radio installation check-outs servo testing ballast checking etc General Electric batteries have unique feature like have incorporated vent opens under pressure automatically recloses years ago uncommon have battery explode Today because new vented methods would require tremendous abuse cause explosion Over-charging wrong amperage high could still cause problems Usually over-charging proper amperage rate will cause loss battery capacity caused loss chemicals through needless venting above test equipment can tell capacity pack items also have methods cut-offs warn something suspect Once warnings received can try recharge discharge cycle see pack will regain proper capacity recommend individual battery checked since reverse weak battery can cause problems other batteries possibly short Out whole pack under right circumstances appears OK General Electric has recommended procedure testing have found quite reliable recommended test procedure sealed cell batteries new prior installation We-FlyLab has used system replacement battery checking cells have either reversed fallen below 10 volt year two old little usage have no indication leakage open vent presented fool-proof test procedure Discard questionable battery flight use new return dealer factory explanation book put out General Electric NickelCadmium Battery Application Engineering Handbook available General Electric Co Battery Business Dept PO Box 861 Gaines ville FL32602 saysSealedcellbatteries normally shipped discharged condition Prior installation nickel-cadmium sealed cells may checked follows 1 Measure open circuit voltage equal greater 1 volt cell acceptable open circuit voltage less 1 0 volt cell may defective may have inadvertently shorted down during shipping handling such driven slightly reverse determine proceed step 2 3 2 open circuit voltage step 1 less 10 volt proceed follows Apply 4C charge 30 seconds b Apply 4C discharge 2 3 seconds c Measure end-of-discharge voltage less 10 volt cell defective equal greater 10 volt perform step 3 Step 2 designed ferret out cells may have low resistance shorts opens quick test will determine cells battery have high resistance shorts step 3 also recommended 3 Test cell has failed step 1 passed step 2c follows Short individual cell 24 hours b Apply 01 C charge 2 minutes Voltage will rise 12 volt c Rest cell 90 minutes open circuited d Measure open circuit voltage 05 volt greater cell acceptable After procedure has completed 62 Model Aviation Hall surtaces printed JI 1 sneet cut outline ana sanded snape Note tnat rudder elevators contoured shape about 1/16 trailing edges Any flight gains marginal weight saved helps hold down wing loading avoids ballasting nose Remember weight tle tail requires about three times much weight nose balance Something about simplicity little 3-channel crate reminded Bob things have gone through reach taken-for-granted point see text batteries repacked cycle battery pack through Digipace Power Pacer least twice technique use item 2 b quite simple good voltmeter necessary read volts amperage resistance 4C 4 x Capacityora45OmAx4 1800 mAorl8A 225 mA would equal 09 500 mA would equal 2A inexpensive AC-DC con verter power supplies market resistors needed discharge cycle standard local electronics supply house battery adventure kind two-headed subject aeromodeling dont want mess phase hobby want know selfassurance safety air We- Fly- Lab cannot make electronics experts can help explore some potentials within reach frugal pocketbook curious minds Caution portion ofthe battery world should applied other types Fast Charge Quick Charge Vented batteries require other special techniques Scamp proved fun model dialogue batteries partial answer key questions asked want send questions will try answer adven tures Letters magniloquent will appraised usually answerable tunately far greater percentage mail comes for-fun sincere constructive aeromodelers Letters can sent direct Robert S Harrah PO Box 99419 San Diego CA 92109
Edition: Model Aviation - 1980/03
Page Numbers: 58, 59, 60, 61, 62, 63
NO OCR TEXT NO OCR TEXT smooth runway Flying would about same Enya 15 since weonly used full power takeoffs playing Half thxot tie less adequate flying As pictures show well thought out kit goes together rapidly some Sig innovations keep building interesting Although mentioned earlier what could recommended beginners airplane based flying ability Since now seeing more nonbuilder-buy-and-fly RCs flying sites would good kit learning build models can builder pilot course drawback buyand-fly some things go wrong can always blame guy built conversely build-and-fly full responsibility yours alone However Sig does supply 16page comprehensive set building flying instructions including close-up pictures draw ings step-by-step text assist new builder through construction adventure Scamp conglomerate memories real airplanes past also mixture little old new kit depart ment requires skills old cutting shaping balsa new man-made products like foam wing requires special handling compatible paints use plastic coverings matching old-time method using dopetype finishes match new requires little learning choice glues broad requires bit comprehensive planning before kit box hardly open Now dont get us wrong does make better safer models air does require some reading understanding along way fun part We-Fly-Lab can look up rafters see tissue-covered Jetco A-i Silkspan-covered Buzzard bambootissue-covered Zipper some slab-balsa WW combat control-line jobs maverick free-flights some naked old-timerslike Lanzo Playboy just havent gotten around finishingand delightful Cub floats always around aero modeler wants little bit nostalgia new crates methods technological ad vancements also exciting may better cases can sure gutwrenching sometimes find out Some great crates mentioned above cast some pretty long shadows being very objective necessary Scamp compared part whole new generation crates time can pass judgment little quickie fun build gave us chance test Carl Goldbergs new Super Jet instant glue under different circumstances Following instructions recommended applications helped us save lot weight months ago purchased some Du-Bro Control Over-Ride Servo Saver units Because problems throttle linkage past knew needed unique device ready reach have sat shelf during adventures linkage just happened match No matter tried servo throttle arm Scamp just refused synchronization other Throttle re tracts spoilers usually fixed moments throw usually ones keep servo growling proper synchronization cannot achieved supplied linkage Du-Bro unit natural cases help prevent damage servo Although difficult document suspect servo noise caused under over-ride conditions could also cause signal interference may cause erratic 60 Model Aviation toam wlngea oirareauyforthe air ones MRC Enysl5 swinging aTop FliteSuperM prop MonoKote EconoKote used recommended manner help set off Williams Brothers wheel tail-wheel assembly Just love big fillet flows vertical tail Sig uses printed outlines balsa aid bulldlng Inese pans require uutting ply doublers other parts come accurately cut Note safe antenna exit point top cabin control airplane Being safe side keeping parts harmony may save lot repairs Editor Servo overloads boost drain sky-high mistake think terms pounds-pull force things Planning during construction model can help keep ready hit skies soon batteries charged offer good happy outings flying site help achieve durability longevity We-Fly-Lab took some liberties perhaps better original design worth trying plan some stunting did wing must held down securely fresh rubber bands used three side going across wing two direction going diagonally across wingthese put last help hold parallel bands use rubber bands can after few applications start crushing foam therefore added two 1/32 plywood doublers area see pictures Econokoted over fuselage covered MonoKote sealed down very hard around engine cowling area lightly sanded along edge exposed covering wiped alcohol masked ott sprayed four coats Pactra Formula-U polyurethane finish added protection against fuel penetration area added day-glow orange strip wing panel first help balance wing second help regain control airplane should get disoriented air know whether coming going feature has acclaimed through years aid keep trying out never really remember wing put blasted thing So go back old reliable method give little right rudder airplane goes right its going away goes left its headed toward Switching part Scamp question has directed us what doing about battery reliability checking Out system general consider use nickel-cadmium batteries very reliable method used properly abused can hazard crash-costly As pile batteries picture shows We-Fly-Lab has used types did stretch little Some out some portable electronic gear RC does present cross section some types batteries available Before approach some applicable points RC batteries recommended keep current file battery data available data own particular type battery since can vary other should priority collectable pictures second edition handbook put out General Electric good basic reference guide available Ace RIG could best $5 ever spent keeping crates flying Engineering books also good takes lot digging Specification sheets come new batteries cases difficult understand some type basic reference book Especially used radio purchased specification sheets could deceiving plugging charger wall assum ing OK Radio-control units can purchased using primary and/or secondary batteries primary battery like dry battery discharged completely no longer serviceable secondary battery may used repeatedly because chemical reaction can reversed recharged 60s radios such Min-X using Galloping Ghost activators quite common flying site advantageous weight-wise longer flying time use combination primary secondary battery packs airplane Depending funds avail able spend very expensive nickel-cadmium rechargeable batteries trans mitter could powered either type Still because initial expense radio systems can purchased using either type battery Usually primary systems can converted secondary purchase set rechargeable batteries charging unit Usually terms vented sealed batteries refer rechargeable types Vented batteries ones fluid can added because basic construction require vent ilation Sealed batteries also use electrolite require safety vent referred sealed batteries Yes confusing script learn live Probably key remember sealed batteries like use RC vented some manner some sealed batteries small hole visible positive end others use pressure safety cap can eject under pressure leaving small hole both ofthese tvoes nossible under March 1980 61 Harrah report has channels Mississippi Delta chooses wisely can find support equipment aid achieving hundreds reliable flights shown medium priced voltmeter reference books L R Taylor Ace charge discharge units Add George Myers use ammeter detect installation drag causes high servo current drain may avoid trouble forever Scamp course can quite simply flown Rubber- band- mounted styrene wings sometimes need monal support trailing edge pre vent crushing ply doublers held place bags lead shot epoxy sets wing sanded covered EconoKote requires less heat iron shrink MonoKote preferred materiallike Solarfilmfor safe covering over foam too much additional internal pressures caused up greenish corrosion sometimes improper charge discharge start leaking formed flux core solder wrongly used fluid through vent will probably show joining cells though batteries will still take charge much can measured putting battery through controlled discharge recharge discharge using measuring devices such Ace Digipace L C Taylor Co Power Pacer have used both units almost year RC other applications found both functional reliable discard batteries flying have signs leakage reassemble batteries packs general use during radio installation check-outs servo testing ballast checking etc General Electric batteries have unique feature like have incorporated vent opens under pressure automatically recloses years ago uncommon have battery explode Today because new vented methods would require tremendous abuse cause explosion Over-charging wrong amperage high could still cause problems Usually over-charging proper amperage rate will cause loss battery capacity caused loss chemicals through needless venting above test equipment can tell capacity pack items also have methods cut-offs warn something suspect Once warnings received can try recharge discharge cycle see pack will regain proper capacity recommend individual battery checked since reverse weak battery can cause problems other batteries possibly short Out whole pack under right circumstances appears OK General Electric has recommended procedure testing have found quite reliable recommended test procedure sealed cell batteries new prior installation We-FlyLab has used system replacement battery checking cells have either reversed fallen below 10 volt year two old little usage have no indication leakage open vent presented fool-proof test procedure Discard questionable battery flight use new return dealer factory explanation book put out General Electric NickelCadmium Battery Application Engineering Handbook available General Electric Co Battery Business Dept PO Box 861 Gaines ville FL32602 saysSealedcellbatteries normally shipped discharged condition Prior installation nickel-cadmium sealed cells may checked follows 1 Measure open circuit voltage equal greater 1 volt cell acceptable open circuit voltage less 1 0 volt cell may defective may have inadvertently shorted down during shipping handling such driven slightly reverse determine proceed step 2 3 2 open circuit voltage step 1 less 10 volt proceed follows Apply 4C charge 30 seconds b Apply 4C discharge 2 3 seconds c Measure end-of-discharge voltage less 10 volt cell defective equal greater 10 volt perform step 3 Step 2 designed ferret out cells may have low resistance shorts opens quick test will determine cells battery have high resistance shorts step 3 also recommended 3 Test cell has failed step 1 passed step 2c follows Short individual cell 24 hours b Apply 01 C charge 2 minutes Voltage will rise 12 volt c Rest cell 90 minutes open circuited d Measure open circuit voltage 05 volt greater cell acceptable After procedure has completed 62 Model Aviation Hall surtaces printed JI 1 sneet cut outline ana sanded snape Note tnat rudder elevators contoured shape about 1/16 trailing edges Any flight gains marginal weight saved helps hold down wing loading avoids ballasting nose Remember weight tle tail requires about three times much weight nose balance Something about simplicity little 3-channel crate reminded Bob things have gone through reach taken-for-granted point see text batteries repacked cycle battery pack through Digipace Power Pacer least twice technique use item 2 b quite simple good voltmeter necessary read volts amperage resistance 4C 4 x Capacityora45OmAx4 1800 mAorl8A 225 mA would equal 09 500 mA would equal 2A inexpensive AC-DC con verter power supplies market resistors needed discharge cycle standard local electronics supply house battery adventure kind two-headed subject aeromodeling dont want mess phase hobby want know selfassurance safety air We- Fly- Lab cannot make electronics experts can help explore some potentials within reach frugal pocketbook curious minds Caution portion ofthe battery world should applied other types Fast Charge Quick Charge Vented batteries require other special techniques Scamp proved fun model dialogue batteries partial answer key questions asked want send questions will try answer adven tures Letters magniloquent will appraised usually answerable tunately far greater percentage mail comes for-fun sincere constructive aeromodelers Letters can sent direct Robert S Harrah PO Box 99419 San Diego CA 92109
Edition: Model Aviation - 1980/03
Page Numbers: 58, 59, 60, 61, 62, 63
NO OCR TEXT NO OCR TEXT smooth runway Flying would about same Enya 15 since weonly used full power takeoffs playing Half thxot tie less adequate flying As pictures show well thought out kit goes together rapidly some Sig innovations keep building interesting Although mentioned earlier what could recommended beginners airplane based flying ability Since now seeing more nonbuilder-buy-and-fly RCs flying sites would good kit learning build models can builder pilot course drawback buyand-fly some things go wrong can always blame guy built conversely build-and-fly full responsibility yours alone However Sig does supply 16page comprehensive set building flying instructions including close-up pictures draw ings step-by-step text assist new builder through construction adventure Scamp conglomerate memories real airplanes past also mixture little old new kit depart ment requires skills old cutting shaping balsa new man-made products like foam wing requires special handling compatible paints use plastic coverings matching old-time method using dopetype finishes match new requires little learning choice glues broad requires bit comprehensive planning before kit box hardly open Now dont get us wrong does make better safer models air does require some reading understanding along way fun part We-Fly-Lab can look up rafters see tissue-covered Jetco A-i Silkspan-covered Buzzard bambootissue-covered Zipper some slab-balsa WW combat control-line jobs maverick free-flights some naked old-timerslike Lanzo Playboy just havent gotten around finishingand delightful Cub floats always around aero modeler wants little bit nostalgia new crates methods technological ad vancements also exciting may better cases can sure gutwrenching sometimes find out Some great crates mentioned above cast some pretty long shadows being very objective necessary Scamp compared part whole new generation crates time can pass judgment little quickie fun build gave us chance test Carl Goldbergs new Super Jet instant glue under different circumstances Following instructions recommended applications helped us save lot weight months ago purchased some Du-Bro Control Over-Ride Servo Saver units Because problems throttle linkage past knew needed unique device ready reach have sat shelf during adventures linkage just happened match No matter tried servo throttle arm Scamp just refused synchronization other Throttle re tracts spoilers usually fixed moments throw usually ones keep servo growling proper synchronization cannot achieved supplied linkage Du-Bro unit natural cases help prevent damage servo Although difficult document suspect servo noise caused under over-ride conditions could also cause signal interference may cause erratic 60 Model Aviation toam wlngea oirareauyforthe air ones MRC Enysl5 swinging aTop FliteSuperM prop MonoKote EconoKote used recommended manner help set off Williams Brothers wheel tail-wheel assembly Just love big fillet flows vertical tail Sig uses printed outlines balsa aid bulldlng Inese pans require uutting ply doublers other parts come accurately cut Note safe antenna exit point top cabin control airplane Being safe side keeping parts harmony may save lot repairs Editor Servo overloads boost drain sky-high mistake think terms pounds-pull force things Planning during construction model can help keep ready hit skies soon batteries charged offer good happy outings flying site help achieve durability longevity We-Fly-Lab took some liberties perhaps better original design worth trying plan some stunting did wing must held down securely fresh rubber bands used three side going across wing two direction going diagonally across wingthese put last help hold parallel bands use rubber bands can after few applications start crushing foam therefore added two 1/32 plywood doublers area see pictures Econokoted over fuselage covered MonoKote sealed down very hard around engine cowling area lightly sanded along edge exposed covering wiped alcohol masked ott sprayed four coats Pactra Formula-U polyurethane finish added protection against fuel penetration area added day-glow orange strip wing panel first help balance wing second help regain control airplane should get disoriented air know whether coming going feature has acclaimed through years aid keep trying out never really remember wing put blasted thing So go back old reliable method give little right rudder airplane goes right its going away goes left its headed toward Switching part Scamp question has directed us what doing about battery reliability checking Out system general consider use nickel-cadmium batteries very reliable method used properly abused can hazard crash-costly As pile batteries picture shows We-Fly-Lab has used types did stretch little Some out some portable electronic gear RC does present cross section some types batteries available Before approach some applicable points RC batteries recommended keep current file battery data available data own particular type battery since can vary other should priority collectable pictures second edition handbook put out General Electric good basic reference guide available Ace RIG could best $5 ever spent keeping crates flying Engineering books also good takes lot digging Specification sheets come new batteries cases difficult understand some type basic reference book Especially used radio purchased specification sheets could deceiving plugging charger wall assum ing OK Radio-control units can purchased using primary and/or secondary batteries primary battery like dry battery discharged completely no longer serviceable secondary battery may used repeatedly because chemical reaction can reversed recharged 60s radios such Min-X using Galloping Ghost activators quite common flying site advantageous weight-wise longer flying time use combination primary secondary battery packs airplane Depending funds avail able spend very expensive nickel-cadmium rechargeable batteries trans mitter could powered either type Still because initial expense radio systems can purchased using either type battery Usually primary systems can converted secondary purchase set rechargeable batteries charging unit Usually terms vented sealed batteries refer rechargeable types Vented batteries ones fluid can added because basic construction require vent ilation Sealed batteries also use electrolite require safety vent referred sealed batteries Yes confusing script learn live Probably key remember sealed batteries like use RC vented some manner some sealed batteries small hole visible positive end others use pressure safety cap can eject under pressure leaving small hole both ofthese tvoes nossible under March 1980 61 Harrah report has channels Mississippi Delta chooses wisely can find support equipment aid achieving hundreds reliable flights shown medium priced voltmeter reference books L R Taylor Ace charge discharge units Add George Myers use ammeter detect installation drag causes high servo current drain may avoid trouble forever Scamp course can quite simply flown Rubber- band- mounted styrene wings sometimes need monal support trailing edge pre vent crushing ply doublers held place bags lead shot epoxy sets wing sanded covered EconoKote requires less heat iron shrink MonoKote preferred materiallike Solarfilmfor safe covering over foam too much additional internal pressures caused up greenish corrosion sometimes improper charge discharge start leaking formed flux core solder wrongly used fluid through vent will probably show joining cells though batteries will still take charge much can measured putting battery through controlled discharge recharge discharge using measuring devices such Ace Digipace L C Taylor Co Power Pacer have used both units almost year RC other applications found both functional reliable discard batteries flying have signs leakage reassemble batteries packs general use during radio installation check-outs servo testing ballast checking etc General Electric batteries have unique feature like have incorporated vent opens under pressure automatically recloses years ago uncommon have battery explode Today because new vented methods would require tremendous abuse cause explosion Over-charging wrong amperage high could still cause problems Usually over-charging proper amperage rate will cause loss battery capacity caused loss chemicals through needless venting above test equipment can tell capacity pack items also have methods cut-offs warn something suspect Once warnings received can try recharge discharge cycle see pack will regain proper capacity recommend individual battery checked since reverse weak battery can cause problems other batteries possibly short Out whole pack under right circumstances appears OK General Electric has recommended procedure testing have found quite reliable recommended test procedure sealed cell batteries new prior installation We-FlyLab has used system replacement battery checking cells have either reversed fallen below 10 volt year two old little usage have no indication leakage open vent presented fool-proof test procedure Discard questionable battery flight use new return dealer factory explanation book put out General Electric NickelCadmium Battery Application Engineering Handbook available General Electric Co Battery Business Dept PO Box 861 Gaines ville FL32602 saysSealedcellbatteries normally shipped discharged condition Prior installation nickel-cadmium sealed cells may checked follows 1 Measure open circuit voltage equal greater 1 volt cell acceptable open circuit voltage less 1 0 volt cell may defective may have inadvertently shorted down during shipping handling such driven slightly reverse determine proceed step 2 3 2 open circuit voltage step 1 less 10 volt proceed follows Apply 4C charge 30 seconds b Apply 4C discharge 2 3 seconds c Measure end-of-discharge voltage less 10 volt cell defective equal greater 10 volt perform step 3 Step 2 designed ferret out cells may have low resistance shorts opens quick test will determine cells battery have high resistance shorts step 3 also recommended 3 Test cell has failed step 1 passed step 2c follows Short individual cell 24 hours b Apply 01 C charge 2 minutes Voltage will rise 12 volt c Rest cell 90 minutes open circuited d Measure open circuit voltage 05 volt greater cell acceptable After procedure has completed 62 Model Aviation Hall surtaces printed JI 1 sneet cut outline ana sanded snape Note tnat rudder elevators contoured shape about 1/16 trailing edges Any flight gains marginal weight saved helps hold down wing loading avoids ballasting nose Remember weight tle tail requires about three times much weight nose balance Something about simplicity little 3-channel crate reminded Bob things have gone through reach taken-for-granted point see text batteries repacked cycle battery pack through Digipace Power Pacer least twice technique use item 2 b quite simple good voltmeter necessary read volts amperage resistance 4C 4 x Capacityora45OmAx4 1800 mAorl8A 225 mA would equal 09 500 mA would equal 2A inexpensive AC-DC con verter power supplies market resistors needed discharge cycle standard local electronics supply house battery adventure kind two-headed subject aeromodeling dont want mess phase hobby want know selfassurance safety air We- Fly- Lab cannot make electronics experts can help explore some potentials within reach frugal pocketbook curious minds Caution portion ofthe battery world should applied other types Fast Charge Quick Charge Vented batteries require other special techniques Scamp proved fun model dialogue batteries partial answer key questions asked want send questions will try answer adven tures Letters magniloquent will appraised usually answerable tunately far greater percentage mail comes for-fun sincere constructive aeromodelers Letters can sent direct Robert S Harrah PO Box 99419 San Diego CA 92109
Edition: Model Aviation - 1980/03
Page Numbers: 58, 59, 60, 61, 62, 63
NO OCR TEXT NO OCR TEXT smooth runway Flying would about same Enya 15 since weonly used full power takeoffs playing Half thxot tie less adequate flying As pictures show well thought out kit goes together rapidly some Sig innovations keep building interesting Although mentioned earlier what could recommended beginners airplane based flying ability Since now seeing more nonbuilder-buy-and-fly RCs flying sites would good kit learning build models can builder pilot course drawback buyand-fly some things go wrong can always blame guy built conversely build-and-fly full responsibility yours alone However Sig does supply 16page comprehensive set building flying instructions including close-up pictures draw ings step-by-step text assist new builder through construction adventure Scamp conglomerate memories real airplanes past also mixture little old new kit depart ment requires skills old cutting shaping balsa new man-made products like foam wing requires special handling compatible paints use plastic coverings matching old-time method using dopetype finishes match new requires little learning choice glues broad requires bit comprehensive planning before kit box hardly open Now dont get us wrong does make better safer models air does require some reading understanding along way fun part We-Fly-Lab can look up rafters see tissue-covered Jetco A-i Silkspan-covered Buzzard bambootissue-covered Zipper some slab-balsa WW combat control-line jobs maverick free-flights some naked old-timerslike Lanzo Playboy just havent gotten around finishingand delightful Cub floats always around aero modeler wants little bit nostalgia new crates methods technological ad vancements also exciting may better cases can sure gutwrenching sometimes find out Some great crates mentioned above cast some pretty long shadows being very objective necessary Scamp compared part whole new generation crates time can pass judgment little quickie fun build gave us chance test Carl Goldbergs new Super Jet instant glue under different circumstances Following instructions recommended applications helped us save lot weight months ago purchased some Du-Bro Control Over-Ride Servo Saver units Because problems throttle linkage past knew needed unique device ready reach have sat shelf during adventures linkage just happened match No matter tried servo throttle arm Scamp just refused synchronization other Throttle re tracts spoilers usually fixed moments throw usually ones keep servo growling proper synchronization cannot achieved supplied linkage Du-Bro unit natural cases help prevent damage servo Although difficult document suspect servo noise caused under over-ride conditions could also cause signal interference may cause erratic 60 Model Aviation toam wlngea oirareauyforthe air ones MRC Enysl5 swinging aTop FliteSuperM prop MonoKote EconoKote used recommended manner help set off Williams Brothers wheel tail-wheel assembly Just love big fillet flows vertical tail Sig uses printed outlines balsa aid bulldlng Inese pans require uutting ply doublers other parts come accurately cut Note safe antenna exit point top cabin control airplane Being safe side keeping parts harmony may save lot repairs Editor Servo overloads boost drain sky-high mistake think terms pounds-pull force things Planning during construction model can help keep ready hit skies soon batteries charged offer good happy outings flying site help achieve durability longevity We-Fly-Lab took some liberties perhaps better original design worth trying plan some stunting did wing must held down securely fresh rubber bands used three side going across wing two direction going diagonally across wingthese put last help hold parallel bands use rubber bands can after few applications start crushing foam therefore added two 1/32 plywood doublers area see pictures Econokoted over fuselage covered MonoKote sealed down very hard around engine cowling area lightly sanded along edge exposed covering wiped alcohol masked ott sprayed four coats Pactra Formula-U polyurethane finish added protection against fuel penetration area added day-glow orange strip wing panel first help balance wing second help regain control airplane should get disoriented air know whether coming going feature has acclaimed through years aid keep trying out never really remember wing put blasted thing So go back old reliable method give little right rudder airplane goes right its going away goes left its headed toward Switching part Scamp question has directed us what doing about battery reliability checking Out system general consider use nickel-cadmium batteries very reliable method used properly abused can hazard crash-costly As pile batteries picture shows We-Fly-Lab has used types did stretch little Some out some portable electronic gear RC does present cross section some types batteries available Before approach some applicable points RC batteries recommended keep current file battery data available data own particular type battery since can vary other should priority collectable pictures second edition handbook put out General Electric good basic reference guide available Ace RIG could best $5 ever spent keeping crates flying Engineering books also good takes lot digging Specification sheets come new batteries cases difficult understand some type basic reference book Especially used radio purchased specification sheets could deceiving plugging charger wall assum ing OK Radio-control units can purchased using primary and/or secondary batteries primary battery like dry battery discharged completely no longer serviceable secondary battery may used repeatedly because chemical reaction can reversed recharged 60s radios such Min-X using Galloping Ghost activators quite common flying site advantageous weight-wise longer flying time use combination primary secondary battery packs airplane Depending funds avail able spend very expensive nickel-cadmium rechargeable batteries trans mitter could powered either type Still because initial expense radio systems can purchased using either type battery Usually primary systems can converted secondary purchase set rechargeable batteries charging unit Usually terms vented sealed batteries refer rechargeable types Vented batteries ones fluid can added because basic construction require vent ilation Sealed batteries also use electrolite require safety vent referred sealed batteries Yes confusing script learn live Probably key remember sealed batteries like use RC vented some manner some sealed batteries small hole visible positive end others use pressure safety cap can eject under pressure leaving small hole both ofthese tvoes nossible under March 1980 61 Harrah report has channels Mississippi Delta chooses wisely can find support equipment aid achieving hundreds reliable flights shown medium priced voltmeter reference books L R Taylor Ace charge discharge units Add George Myers use ammeter detect installation drag causes high servo current drain may avoid trouble forever Scamp course can quite simply flown Rubber- band- mounted styrene wings sometimes need monal support trailing edge pre vent crushing ply doublers held place bags lead shot epoxy sets wing sanded covered EconoKote requires less heat iron shrink MonoKote preferred materiallike Solarfilmfor safe covering over foam too much additional internal pressures caused up greenish corrosion sometimes improper charge discharge start leaking formed flux core solder wrongly used fluid through vent will probably show joining cells though batteries will still take charge much can measured putting battery through controlled discharge recharge discharge using measuring devices such Ace Digipace L C Taylor Co Power Pacer have used both units almost year RC other applications found both functional reliable discard batteries flying have signs leakage reassemble batteries packs general use during radio installation check-outs servo testing ballast checking etc General Electric batteries have unique feature like have incorporated vent opens under pressure automatically recloses years ago uncommon have battery explode Today because new vented methods would require tremendous abuse cause explosion Over-charging wrong amperage high could still cause problems Usually over-charging proper amperage rate will cause loss battery capacity caused loss chemicals through needless venting above test equipment can tell capacity pack items also have methods cut-offs warn something suspect Once warnings received can try recharge discharge cycle see pack will regain proper capacity recommend individual battery checked since reverse weak battery can cause problems other batteries possibly short Out whole pack under right circumstances appears OK General Electric has recommended procedure testing have found quite reliable recommended test procedure sealed cell batteries new prior installation We-FlyLab has used system replacement battery checking cells have either reversed fallen below 10 volt year two old little usage have no indication leakage open vent presented fool-proof test procedure Discard questionable battery flight use new return dealer factory explanation book put out General Electric NickelCadmium Battery Application Engineering Handbook available General Electric Co Battery Business Dept PO Box 861 Gaines ville FL32602 saysSealedcellbatteries normally shipped discharged condition Prior installation nickel-cadmium sealed cells may checked follows 1 Measure open circuit voltage equal greater 1 volt cell acceptable open circuit voltage less 1 0 volt cell may defective may have inadvertently shorted down during shipping handling such driven slightly reverse determine proceed step 2 3 2 open circuit voltage step 1 less 10 volt proceed follows Apply 4C charge 30 seconds b Apply 4C discharge 2 3 seconds c Measure end-of-discharge voltage less 10 volt cell defective equal greater 10 volt perform step 3 Step 2 designed ferret out cells may have low resistance shorts opens quick test will determine cells battery have high resistance shorts step 3 also recommended 3 Test cell has failed step 1 passed step 2c follows Short individual cell 24 hours b Apply 01 C charge 2 minutes Voltage will rise 12 volt c Rest cell 90 minutes open circuited d Measure open circuit voltage 05 volt greater cell acceptable After procedure has completed 62 Model Aviation Hall surtaces printed JI 1 sneet cut outline ana sanded snape Note tnat rudder elevators contoured shape about 1/16 trailing edges Any flight gains marginal weight saved helps hold down wing loading avoids ballasting nose Remember weight tle tail requires about three times much weight nose balance Something about simplicity little 3-channel crate reminded Bob things have gone through reach taken-for-granted point see text batteries repacked cycle battery pack through Digipace Power Pacer least twice technique use item 2 b quite simple good voltmeter necessary read volts amperage resistance 4C 4 x Capacityora45OmAx4 1800 mAorl8A 225 mA would equal 09 500 mA would equal 2A inexpensive AC-DC con verter power supplies market resistors needed discharge cycle standard local electronics supply house battery adventure kind two-headed subject aeromodeling dont want mess phase hobby want know selfassurance safety air We- Fly- Lab cannot make electronics experts can help explore some potentials within reach frugal pocketbook curious minds Caution portion ofthe battery world should applied other types Fast Charge Quick Charge Vented batteries require other special techniques Scamp proved fun model dialogue batteries partial answer key questions asked want send questions will try answer adven tures Letters magniloquent will appraised usually answerable tunately far greater percentage mail comes for-fun sincere constructive aeromodelers Letters can sent direct Robert S Harrah PO Box 99419 San Diego CA 92109
Edition: Model Aviation - 1980/03
Page Numbers: 58, 59, 60, 61, 62, 63
NO OCR TEXT NO OCR TEXT smooth runway Flying would about same Enya 15 since weonly used full power takeoffs playing Half thxot tie less adequate flying As pictures show well thought out kit goes together rapidly some Sig innovations keep building interesting Although mentioned earlier what could recommended beginners airplane based flying ability Since now seeing more nonbuilder-buy-and-fly RCs flying sites would good kit learning build models can builder pilot course drawback buyand-fly some things go wrong can always blame guy built conversely build-and-fly full responsibility yours alone However Sig does supply 16page comprehensive set building flying instructions including close-up pictures draw ings step-by-step text assist new builder through construction adventure Scamp conglomerate memories real airplanes past also mixture little old new kit depart ment requires skills old cutting shaping balsa new man-made products like foam wing requires special handling compatible paints use plastic coverings matching old-time method using dopetype finishes match new requires little learning choice glues broad requires bit comprehensive planning before kit box hardly open Now dont get us wrong does make better safer models air does require some reading understanding along way fun part We-Fly-Lab can look up rafters see tissue-covered Jetco A-i Silkspan-covered Buzzard bambootissue-covered Zipper some slab-balsa WW combat control-line jobs maverick free-flights some naked old-timerslike Lanzo Playboy just havent gotten around finishingand delightful Cub floats always around aero modeler wants little bit nostalgia new crates methods technological ad vancements also exciting may better cases can sure gutwrenching sometimes find out Some great crates mentioned above cast some pretty long shadows being very objective necessary Scamp compared part whole new generation crates time can pass judgment little quickie fun build gave us chance test Carl Goldbergs new Super Jet instant glue under different circumstances Following instructions recommended applications helped us save lot weight months ago purchased some Du-Bro Control Over-Ride Servo Saver units Because problems throttle linkage past knew needed unique device ready reach have sat shelf during adventures linkage just happened match No matter tried servo throttle arm Scamp just refused synchronization other Throttle re tracts spoilers usually fixed moments throw usually ones keep servo growling proper synchronization cannot achieved supplied linkage Du-Bro unit natural cases help prevent damage servo Although difficult document suspect servo noise caused under over-ride conditions could also cause signal interference may cause erratic 60 Model Aviation toam wlngea oirareauyforthe air ones MRC Enysl5 swinging aTop FliteSuperM prop MonoKote EconoKote used recommended manner help set off Williams Brothers wheel tail-wheel assembly Just love big fillet flows vertical tail Sig uses printed outlines balsa aid bulldlng Inese pans require uutting ply doublers other parts come accurately cut Note safe antenna exit point top cabin control airplane Being safe side keeping parts harmony may save lot repairs Editor Servo overloads boost drain sky-high mistake think terms pounds-pull force things Planning during construction model can help keep ready hit skies soon batteries charged offer good happy outings flying site help achieve durability longevity We-Fly-Lab took some liberties perhaps better original design worth trying plan some stunting did wing must held down securely fresh rubber bands used three side going across wing two direction going diagonally across wingthese put last help hold parallel bands use rubber bands can after few applications start crushing foam therefore added two 1/32 plywood doublers area see pictures Econokoted over fuselage covered MonoKote sealed down very hard around engine cowling area lightly sanded along edge exposed covering wiped alcohol masked ott sprayed four coats Pactra Formula-U polyurethane finish added protection against fuel penetration area added day-glow orange strip wing panel first help balance wing second help regain control airplane should get disoriented air know whether coming going feature has acclaimed through years aid keep trying out never really remember wing put blasted thing So go back old reliable method give little right rudder airplane goes right its going away goes left its headed toward Switching part Scamp question has directed us what doing about battery reliability checking Out system general consider use nickel-cadmium batteries very reliable method used properly abused can hazard crash-costly As pile batteries picture shows We-Fly-Lab has used types did stretch little Some out some portable electronic gear RC does present cross section some types batteries available Before approach some applicable points RC batteries recommended keep current file battery data available data own particular type battery since can vary other should priority collectable pictures second edition handbook put out General Electric good basic reference guide available Ace RIG could best $5 ever spent keeping crates flying Engineering books also good takes lot digging Specification sheets come new batteries cases difficult understand some type basic reference book Especially used radio purchased specification sheets could deceiving plugging charger wall assum ing OK Radio-control units can purchased using primary and/or secondary batteries primary battery like dry battery discharged completely no longer serviceable secondary battery may used repeatedly because chemical reaction can reversed recharged 60s radios such Min-X using Galloping Ghost activators quite common flying site advantageous weight-wise longer flying time use combination primary secondary battery packs airplane Depending funds avail able spend very expensive nickel-cadmium rechargeable batteries trans mitter could powered either type Still because initial expense radio systems can purchased using either type battery Usually primary systems can converted secondary purchase set rechargeable batteries charging unit Usually terms vented sealed batteries refer rechargeable types Vented batteries ones fluid can added because basic construction require vent ilation Sealed batteries also use electrolite require safety vent referred sealed batteries Yes confusing script learn live Probably key remember sealed batteries like use RC vented some manner some sealed batteries small hole visible positive end others use pressure safety cap can eject under pressure leaving small hole both ofthese tvoes nossible under March 1980 61 Harrah report has channels Mississippi Delta chooses wisely can find support equipment aid achieving hundreds reliable flights shown medium priced voltmeter reference books L R Taylor Ace charge discharge units Add George Myers use ammeter detect installation drag causes high servo current drain may avoid trouble forever Scamp course can quite simply flown Rubber- band- mounted styrene wings sometimes need monal support trailing edge pre vent crushing ply doublers held place bags lead shot epoxy sets wing sanded covered EconoKote requires less heat iron shrink MonoKote preferred materiallike Solarfilmfor safe covering over foam too much additional internal pressures caused up greenish corrosion sometimes improper charge discharge start leaking formed flux core solder wrongly used fluid through vent will probably show joining cells though batteries will still take charge much can measured putting battery through controlled discharge recharge discharge using measuring devices such Ace Digipace L C Taylor Co Power Pacer have used both units almost year RC other applications found both functional reliable discard batteries flying have signs leakage reassemble batteries packs general use during radio installation check-outs servo testing ballast checking etc General Electric batteries have unique feature like have incorporated vent opens under pressure automatically recloses years ago uncommon have battery explode Today because new vented methods would require tremendous abuse cause explosion Over-charging wrong amperage high could still cause problems Usually over-charging proper amperage rate will cause loss battery capacity caused loss chemicals through needless venting above test equipment can tell capacity pack items also have methods cut-offs warn something suspect Once warnings received can try recharge discharge cycle see pack will regain proper capacity recommend individual battery checked since reverse weak battery can cause problems other batteries possibly short Out whole pack under right circumstances appears OK General Electric has recommended procedure testing have found quite reliable recommended test procedure sealed cell batteries new prior installation We-FlyLab has used system replacement battery checking cells have either reversed fallen below 10 volt year two old little usage have no indication leakage open vent presented fool-proof test procedure Discard questionable battery flight use new return dealer factory explanation book put out General Electric NickelCadmium Battery Application Engineering Handbook available General Electric Co Battery Business Dept PO Box 861 Gaines ville FL32602 saysSealedcellbatteries normally shipped discharged condition Prior installation nickel-cadmium sealed cells may checked follows 1 Measure open circuit voltage equal greater 1 volt cell acceptable open circuit voltage less 1 0 volt cell may defective may have inadvertently shorted down during shipping handling such driven slightly reverse determine proceed step 2 3 2 open circuit voltage step 1 less 10 volt proceed follows Apply 4C charge 30 seconds b Apply 4C discharge 2 3 seconds c Measure end-of-discharge voltage less 10 volt cell defective equal greater 10 volt perform step 3 Step 2 designed ferret out cells may have low resistance shorts opens quick test will determine cells battery have high resistance shorts step 3 also recommended 3 Test cell has failed step 1 passed step 2c follows Short individual cell 24 hours b Apply 01 C charge 2 minutes Voltage will rise 12 volt c Rest cell 90 minutes open circuited d Measure open circuit voltage 05 volt greater cell acceptable After procedure has completed 62 Model Aviation Hall surtaces printed JI 1 sneet cut outline ana sanded snape Note tnat rudder elevators contoured shape about 1/16 trailing edges Any flight gains marginal weight saved helps hold down wing loading avoids ballasting nose Remember weight tle tail requires about three times much weight nose balance Something about simplicity little 3-channel crate reminded Bob things have gone through reach taken-for-granted point see text batteries repacked cycle battery pack through Digipace Power Pacer least twice technique use item 2 b quite simple good voltmeter necessary read volts amperage resistance 4C 4 x Capacityora45OmAx4 1800 mAorl8A 225 mA would equal 09 500 mA would equal 2A inexpensive AC-DC con verter power supplies market resistors needed discharge cycle standard local electronics supply house battery adventure kind two-headed subject aeromodeling dont want mess phase hobby want know selfassurance safety air We- Fly- Lab cannot make electronics experts can help explore some potentials within reach frugal pocketbook curious minds Caution portion ofthe battery world should applied other types Fast Charge Quick Charge Vented batteries require other special techniques Scamp proved fun model dialogue batteries partial answer key questions asked want send questions will try answer adven tures Letters magniloquent will appraised usually answerable tunately far greater percentage mail comes for-fun sincere constructive aeromodelers Letters can sent direct Robert S Harrah PO Box 99419 San Diego CA 92109