Direct Servo Connection for CL Models

Direct Servo Connection CL Models U Fred Cronenwett Todays Control Line models far cry 1950s 1960s larger lighter have features modern CL model can take advantage commercially available retractable landing gear fiberglass fuselages Electric motors past wanted retractable gear CL model would have install fourth line required pushrods make system work mechanical systems difficult set up What told you could purchase radio system retracts model airplane kit use CL model special modifications other bellcrank7 electronic CL model uses normal two-line bellcrank handle control elevator insulated lines used carry signal ground transmitter receiver insulation keeps lines shorting out systems take advantage existing Radio Control technology electronic CL model flies two lines can operate eight independent functions controlled individual servos traditional CL Scale model would have used three-line bellcrank additional lines operate other features Next time local hobby shop take good look JR XP642 radio back transmitter jack letters DSC next DSC stands Direct Servo Connection designed RC pilot used pit area allows pilot check operation functions transmitting kind radio signal DSC function hard-wires transmitter receiver radio can used CL model special conversion required 70 Model Aviation pical connection wingtip servo extension can cutThe Direct Servo Connection cord plugged back half required materialstransmitter handle end lines 1 Assemble system per JR instructions 2 Turn transmitter & receiver 3 Operate radio normal 4 Turn transmitter off 5 Plug DSC cord back transmitter radio will beep 6 Plug DSC cord battery charge jack 7 Operate radio DSC mode On/Oft Battery Charge Jack Os 0 Figure #1 shows radio set up used DSC mode RC use pit area normal switch harness comes XP642 radio needs replaced deluxe switch harness has three wires bundle DSC function will work normal switch harness comes radio DSC cord also needs purchased about six feet long plugs back transmitter charge jack receiver switch harness transmitter turned on/off switch front transmitter will transmitting radio signal turn transmitter DSC mode plug DSC chord hack transmitter will notice transmitter turns yet on/off switch still off position Turn receiver would normally will notice radio works same transmitting radio signal XP642 six-channel radio four spring-loaded sticks normal elevator rudder aileron throttle control used RC operation Two additional toggles can used operate other functions such flaps retracts radio has some other features such four-model memory endpoint adjustment servo reversing use endpoint adjustment multimodel memory the models fly DSC system Sig Kadet Seniorita built Servos Receiver L K Fig 1 DSC RC Pilot Pit Area March 1999 71 Hangar 9 Piper Cub fuselage arrangement wire exits fuselage battery charge jack deluxe switch harness required DSC mode Interior Piper Cub receiver receiver battery pack bellcrank 21cell battery Astro 40 motor visible Photos author Graphic Design Jill Ann Cavanaugh kit per Sigs instructions except made airplane tail-dragger added flaps changed nose section have total six servos modelone servo throttle rudder elevator camera shutter release Ill explain reason elevator rudder servos later wing two servos flap also added Ace Servo Master between receiver flap servos slow down deployment flaps have flaps toggle switch normally toggled servo will move very quickly dropping flaps less second flaps deployed nose tends pitch up models trim changes using Servo Master able slow down deployment flaps five seconds allows pilot change elevator trim flaps come down looks natural adds realism flown CL Scale competition Servo Master can also used sequence landing gear doors servo would used open close doors another servo used operate air valve Using channel both servos sequenced Servo Master Remember radio working DSC mode workbench DSC chord plugged transmitter switch harness Now need add set flying lines between DSC chord switch harness make setup complete flying lines must perform two functions lines structural members must withstand rigors pull-testing must operate bellcrank elevator control lines must also transmit electronic signal ground DSC chord receiver switch harness extending six-foot DSC chord 70 feet flying lines lines nylon-coated salt-water fishing leader seven-stranded steel lines identical lines normally used CL models except coating prevents lines shorting out touch line can custom-ordered local fishing store Remember measure actual wire diameter nylon coating Select wire diameter based following table Assemble lines described Figure 2 Refer Figure 3 see system works whole Model weight 0-4 pounds 4-8 pounds 8-20 pounds Mm Line Diameter 015 021 027 bother system three-line handle has used Fig 2 CL Flying Line Construction Pull wire tight around metal ring optional Crimp tube Nylon-coated fishing leader Exposed wire Slide crimp tube over exposed wires & crimp Cover area heat-shrink tubing electronics connector 72 Model Aviation ors Seniorita can taken apart shown transportation Note elevator rudder can removed Model converted tail-dragger setup Fig3 Female Connector Male Connector Servo Extension STD Two-line Control LineOn/Off HandleOrange Wire Orange Wire- Female Connector Remove Crystal s DSC Cord Transmitter lug DSC cord back of~ transmitter 00 Servo o 0Receiver 48V Batt years Ask yourself questions features can operate Does three-line handle allow neutralelevator adjustment made easily wanted add flaps retracts bomb drop prepared add three lines model drag six flying lines will rather substantial electronic control system can operate functions two flying lines Electronic controls allows user eliminate pushrods springs other mechanical connections required three-line systems can locate servos right next mechanical device such flaps air valve have install short pushrod done radio has two features makes setting up CL model DSC mode extremely easy servo reversing endpoint adjustment servo reversing nothing new feature standard radio allows direction servo arm rotation flipped allowing orientation installation inside airframe End point adjustment changes amount travel servo arm comes handy hooking servo up air valve flaps Often have use very short servo arm reduce amount throw flaps Normally toggled servo will result about 1600 throw servo reversing can limit amount throw 0150% special note tested retract servo endpoint adjustment did respond endpoint modification servo always rotated same amount regardless endpoint adjustment set up flaps Seniorita used endpoint adjustment line up trailing edge flap trailing edge wing used other endpoint adjust much flap deployed Changes can made field matter minutes way can use normal servo arm never adjust clevis hooked up flaps can used other channels resulting exact amount throw required job except retract servos course Since radio has four-model memory can store four different March 1999 73 1 Remove crystal transmitter & receiver 2 Remove Antenna transmitter 3 Cut servo extension half connectors attached flying lines Red wire used / Seniorita being flown CL model see leadouts right Five-minute conversion RC CL No radio signals used CL flight Fig 4 RC/CL Model Airplane Using DSC Rudder Pushrod Throttle Servo servo RC flightElevator Pushrod CL Bellcrank 48V Ball 0 3 V 0 CL mode use flying lines Q/ & DSC cord see fig #2 #3 CL FLight 1 Move elevator pushrod bellcrank 2 Remove crystal transmitter & receiver 3 Fly model flying lines & DSC cord RC FLight 1 Move elevator pushrad servo 2 Remove wingtip weight & leadout guide balance model laterally 8 flight 3 Reinstall crystals 4 Fly normal settings channel including endpoint adjustment servo reversing can have transmitter purchase additional receivers switch harnesses battery servos additional model started flying Grant Hiestand 1989 really investigated possibility flying Electric power throttle control Since Electric power purely electronic device no mechanical three-line system can control type power system So first started using electronic systems discovered CL electronics Electric power match Electric power perfect power source aircraft lots wing area Grant has whole fleet Electric CL models throttle control recently put together Hangar 9 Piper Cub now fly model geared Astro 40 motor 21 cells 2000 Max 2 pounds batteries nine-pound model flies great 10 minutes charge model flown floats 1998 Northwest Control Line Regionals speed control replaces servo normally used throttle plugs directly receiver elevator rudder servos Remember difference between operating radio DSC mode normal RC mode plugged DSC cord between airplane transmitter have same transmitter receiver still have crystal installed So left flying lines home moved elevator pushrod elevator servo removed wingtip weight line guide model can flown RC-style another fiveminute conversion can CL model again using same receiver transmitter Seniorita has flown both ways difference between RC model CL model elevator controlled bellcrank CL flight Refer figure #4 see Seniorita set up During CL flight rudder used flaps throttle used throughout entire flight allows us build model fly either mode very quick conversion time ran another test must keep mind go local flying field CL site fly very close RC flying site left crystal receiver turned airplane DSC jack plugged airplane would pick up signal nearby transmitter same frequency DSC cord plugged model nearby transmitter same channel will affect airplane unplug DSC cord watch out safe side leave transmitter receiver crystal home will problems assemble airplane flown RC CL model using system make sure can easily get receiver remove install crystal flown CL model transmitter attached pilots belt operated touch few minutes practice required get used setup DSC cord available JR perfect length go transmitter handle during flight Any JR radio DSC jack back transmitter can used CL flying special modification Remember need Deluxe Switch Harness DSC Cord make system work properly transition three-line electronics requires new set rules offers rewards have talked CL pilots first thought would like transmitter hanging off belt After trying system models found never built three-line model again Good luck enjoy Cronenwett 21320 Parthenia St #101 Canoga Park CA 91304 74 Model Aviation

Direct Servo Connection CL Models U Fred Cronenwett Todays Control Line models far cry 1950s 1960s larger lighter have features modern CL model can take advantage commercially available retractable landing gear fiberglass fuselages Electric motors past wanted retractable gear CL model would have install fourth line required pushrods make system work mechanical systems difficult set up What told you could purchase radio system retracts model airplane kit use CL model special modifications other bellcrank7 electronic CL model uses normal two-line bellcrank handle control elevator insulated lines used carry signal ground transmitter receiver insulation keeps lines shorting out systems take advantage existing Radio Control technology electronic CL model flies two lines can operate eight independent functions controlled individual servos traditional CL Scale model would have used three-line bellcrank additional lines operate other features Next time local hobby shop take good look JR XP642 radio back transmitter jack letters DSC next DSC stands Direct Servo Connection designed RC pilot used pit area allows pilot check operation functions transmitting kind radio signal DSC function hard-wires transmitter receiver radio can used CL model special conversion required 70 Model Aviation pical connection wingtip servo extension can cutThe Direct Servo Connection cord plugged back half required materialstransmitter handle end lines 1 Assemble system per JR instructions 2 Turn transmitter & receiver 3 Operate radio normal 4 Turn transmitter off 5 Plug DSC cord back transmitter radio will beep 6 Plug DSC cord battery charge jack 7 Operate radio DSC mode On/Oft Battery Charge Jack Os 0 Figure #1 shows radio set up used DSC mode RC use pit area normal switch harness comes XP642 radio needs replaced deluxe switch harness has three wires bundle DSC function will work normal switch harness comes radio DSC cord also needs purchased about six feet long plugs back transmitter charge jack receiver switch harness transmitter turned on/off switch front transmitter will transmitting radio signal turn transmitter DSC mode plug DSC chord hack transmitter will notice transmitter turns yet on/off switch still off position Turn receiver would normally will notice radio works same transmitting radio signal XP642 six-channel radio four spring-loaded sticks normal elevator rudder aileron throttle control used RC operation Two additional toggles can used operate other functions such flaps retracts radio has some other features such four-model memory endpoint adjustment servo reversing use endpoint adjustment multimodel memory the models fly DSC system Sig Kadet Seniorita built Servos Receiver L K Fig 1 DSC RC Pilot Pit Area March 1999 71 Hangar 9 Piper Cub fuselage arrangement wire exits fuselage battery charge jack deluxe switch harness required DSC mode Interior Piper Cub receiver receiver battery pack bellcrank 21cell battery Astro 40 motor visible Photos author Graphic Design Jill Ann Cavanaugh kit per Sigs instructions except made airplane tail-dragger added flaps changed nose section have total six servos modelone servo throttle rudder elevator camera shutter release Ill explain reason elevator rudder servos later wing two servos flap also added Ace Servo Master between receiver flap servos slow down deployment flaps have flaps toggle switch normally toggled servo will move very quickly dropping flaps less second flaps deployed nose tends pitch up models trim changes using Servo Master able slow down deployment flaps five seconds allows pilot change elevator trim flaps come down looks natural adds realism flown CL Scale competition Servo Master can also used sequence landing gear doors servo would used open close doors another servo used operate air valve Using channel both servos sequenced Servo Master Remember radio working DSC mode workbench DSC chord plugged transmitter switch harness Now need add set flying lines between DSC chord switch harness make setup complete flying lines must perform two functions lines structural members must withstand rigors pull-testing must operate bellcrank elevator control lines must also transmit electronic signal ground DSC chord receiver switch harness extending six-foot DSC chord 70 feet flying lines lines nylon-coated salt-water fishing leader seven-stranded steel lines identical lines normally used CL models except coating prevents lines shorting out touch line can custom-ordered local fishing store Remember measure actual wire diameter nylon coating Select wire diameter based following table Assemble lines described Figure 2 Refer Figure 3 see system works whole Model weight 0-4 pounds 4-8 pounds 8-20 pounds Mm Line Diameter 015 021 027 bother system three-line handle has used Fig 2 CL Flying Line Construction Pull wire tight around metal ring optional Crimp tube Nylon-coated fishing leader Exposed wire Slide crimp tube over exposed wires & crimp Cover area heat-shrink tubing electronics connector 72 Model Aviation ors Seniorita can taken apart shown transportation Note elevator rudder can removed Model converted tail-dragger setup Fig3 Female Connector Male Connector Servo Extension STD Two-line Control LineOn/Off HandleOrange Wire Orange Wire- Female Connector Remove Crystal s DSC Cord Transmitter lug DSC cord back of~ transmitter 00 Servo o 0Receiver 48V Batt years Ask yourself questions features can operate Does three-line handle allow neutralelevator adjustment made easily wanted add flaps retracts bomb drop prepared add three lines model drag six flying lines will rather substantial electronic control system can operate functions two flying lines Electronic controls allows user eliminate pushrods springs other mechanical connections required three-line systems can locate servos right next mechanical device such flaps air valve have install short pushrod done radio has two features makes setting up CL model DSC mode extremely easy servo reversing endpoint adjustment servo reversing nothing new feature standard radio allows direction servo arm rotation flipped allowing orientation installation inside airframe End point adjustment changes amount travel servo arm comes handy hooking servo up air valve flaps Often have use very short servo arm reduce amount throw flaps Normally toggled servo will result about 1600 throw servo reversing can limit amount throw 0150% special note tested retract servo endpoint adjustment did respond endpoint modification servo always rotated same amount regardless endpoint adjustment set up flaps Seniorita used endpoint adjustment line up trailing edge flap trailing edge wing used other endpoint adjust much flap deployed Changes can made field matter minutes way can use normal servo arm never adjust clevis hooked up flaps can used other channels resulting exact amount throw required job except retract servos course Since radio has four-model memory can store four different March 1999 73 1 Remove crystal transmitter & receiver 2 Remove Antenna transmitter 3 Cut servo extension half connectors attached flying lines Red wire used / Seniorita being flown CL model see leadouts right Five-minute conversion RC CL No radio signals used CL flight Fig 4 RC/CL Model Airplane Using DSC Rudder Pushrod Throttle Servo servo RC flightElevator Pushrod CL Bellcrank 48V Ball 0 3 V 0 CL mode use flying lines Q/ & DSC cord see fig #2 #3 CL FLight 1 Move elevator pushrod bellcrank 2 Remove crystal transmitter & receiver 3 Fly model flying lines & DSC cord RC FLight 1 Move elevator pushrad servo 2 Remove wingtip weight & leadout guide balance model laterally 8 flight 3 Reinstall crystals 4 Fly normal settings channel including endpoint adjustment servo reversing can have transmitter purchase additional receivers switch harnesses battery servos additional model started flying Grant Hiestand 1989 really investigated possibility flying Electric power throttle control Since Electric power purely electronic device no mechanical three-line system can control type power system So first started using electronic systems discovered CL electronics Electric power match Electric power perfect power source aircraft lots wing area Grant has whole fleet Electric CL models throttle control recently put together Hangar 9 Piper Cub now fly model geared Astro 40 motor 21 cells 2000 Max 2 pounds batteries nine-pound model flies great 10 minutes charge model flown floats 1998 Northwest Control Line Regionals speed control replaces servo normally used throttle plugs directly receiver elevator rudder servos Remember difference between operating radio DSC mode normal RC mode plugged DSC cord between airplane transmitter have same transmitter receiver still have crystal installed So left flying lines home moved elevator pushrod elevator servo removed wingtip weight line guide model can flown RC-style another fiveminute conversion can CL model again using same receiver transmitter Seniorita has flown both ways difference between RC model CL model elevator controlled bellcrank CL flight Refer figure #4 see Seniorita set up During CL flight rudder used flaps throttle used throughout entire flight allows us build model fly either mode very quick conversion time ran another test must keep mind go local flying field CL site fly very close RC flying site left crystal receiver turned airplane DSC jack plugged airplane would pick up signal nearby transmitter same frequency DSC cord plugged model nearby transmitter same channel will affect airplane unplug DSC cord watch out safe side leave transmitter receiver crystal home will problems assemble airplane flown RC CL model using system make sure can easily get receiver remove install crystal flown CL model transmitter attached pilots belt operated touch few minutes practice required get used setup DSC cord available JR perfect length go transmitter handle during flight Any JR radio DSC jack back transmitter can used CL flying special modification Remember need Deluxe Switch Harness DSC Cord make system work properly transition three-line electronics requires new set rules offers rewards have talked CL pilots first thought would like transmitter hanging off belt After trying system models found never built three-line model again Good luck enjoy Cronenwett 21320 Parthenia St #101 Canoga Park CA 91304 74 Model Aviation