RADIO CONTROL ELECTRICS U -1] U J111-~ LL W II THIS MONTHS TOPICS include some followup Large Pack Slow Charger Pulse Mini-Lab articles reader input End Charge Beeper some observations 98 Burlington NJ meet Large Pack Slow Charger July 1997 MA offered two versions easy-to-build overnight charger large motor packs used example equalize cells such packs simply get fully charged ready go next days flying reader asked about slow-charging pack time Specifically wants charge three 10-cell 1000 mAh packs LPSC presented capable charging up 22 cells does know cells come whether individual cells large pack several packs series Since two packs readers example total 20 cells could simply series-connect charge away three packs would total 30 cells example charger would function total connected What LPSC can viewed being made up two electrical circuit functions AC power module full wave voltage doubler circuit attached output charge current circuit entirely possible have first function support two instead just second function Referring LPSC article Radio Shack power module diodes Dl D2 capacitors Cl C2 form first described function components provide basic DC voltages remainder slow charger operates second electrically functional group parts simply remaining partsthe transistor resistors LED etc could assemble additional such functional group also power connect first functional circuit result would LPSC two outputs based power module cost-effective approach since power module single expensive part two outputs could treated single output original design Two packs groups cells up 22 cells could slow-charged simultaneously reader could simultaneously charge up four 10-cell packs build double-output LPSC needs larger boxes described article also recommend using two output circuits power module has limitations its own approach easy economical way add considerable utility basic LPSC design Pulse Mini-Lab RC June 1998 MA multifunction device can measure RC system control pulse variation stick throw generate same signal behavior use servo electronic speed control ESC driver can both great accuracy using PML Electronic Speed Controls equipped BECs Battery Eliminator Circuits necessary open BEC 5 volt output wire ESC wire would normally supply power receiver servos Since PML internally battery powered necessary desirable have BEC output voltage also try power PML Whats needed adapter cable 5 volt wire connect PML BECIESC together BEC-equipped ESCs connect negative signal wires Pulse Mini-Lab attempt power already powered PML BEC regulator 112 Model Aviation in Bamert Mt Laurel NJ 275-inch 119-ounce Astro 02 brushless Speedy Blink miss itin vertical horizontal flight Stock Sig 1h-scale Cub Dennis Vollrath S Milwaukee WI Astro 90 16/2 pounds 36 Sanyo RC1700s 20 x 10 prop Liftoff 213 power easily does 10 minutes Dennis custom speed control Eighteen FETS form power section microprocessor control circuitry remotely located reader found omission Circuit Board Jumpers drawing article p 29 omission best seen looking Circuit Board Assembly drawing same page Note wire Q4 collector elsewhere boardits wire somehow disappeared Jumpers drawing reader also requested clarification installation diodes diodes installed shown black marking band against board anode wires coming off top standing diodes go elsewhere shown drawings reader expressed real appreciation PMLjust what needed testing nonlinear speed control idea End-of-Charge Beeper Beeper reader tells some folks flightline annoyed beeping sound another feels Electric should totally quiet beeping inconsistent Another reader has no hearing beeping does him no good anyway Two readers suggested flashing strobe light indicate end-of-charge Another feels flag indicator would work well him No promises Ill see what can some misunderstanding about applicability EOCB EOCBB circuits work peak-detect chargers chargers timer-controlled limited peak-detect chargers some think general charger shuts offno matter howthe battery-under-charge terminal voltage drops lack charging current drop what end-of-charge circuit senses Burlington NJ County RC Club held its annual Electric meet weekend May 30 usual nicely run affair good flying CD Paul Boxmeyer support crew did fine job everyone spoke afterward very complimentary about meet fact improvement made would should twoday affair rather single day Like KRC BCRC basically wet-power club some E-interestand willingness foresight field annual E-meet routinely encourage E-fliers wannabe E-fliers attend such meets Meets great place see Electrics usually great variety E-modelers normally share information quite conversational Such visits especially combined collecting E-columns feature articles provide enormous amount useful info help get air trouble-free first time BCRC meet lots offer anyone seeking learn about Electrics 29 participants seemed average two three airplanes pretty well covered Electric spectrum Models ranged rather small light docile through quite large awesome power estimated 70 aircraft present got notice Martin Bamerts new Speed 400-size pylon racer has probably just pushed state art 400 pylon appears 115-ounce composite craft its Astro 02 brushlesss power system would simply blow away other contenders least remember last years KRC some very best attendance think Martin now man catch quite few Speed 400-size craft kinds present others knowledge using can-type 400 motors None match brushless 02 popular because low cost 400-size craft included everything Tom Hunts Wing Watt pusher delta sorts several glider configurations lots between impression FMA Tetra combined FMA S80 S90 servos preferred installations airplanes Ivlartin smaller imported receiver described smallest world 400-size airplanes mostly used BEC either Jeti 05 Sprite 20 speed controller several even-lower-power craft easily flown day still conditions including Bill Gtiggs Bleriot awesome watch did count suspect lower-power smaller-airplane end Electric model spectrum dominated attendance Two very capable E-modelers indicated theyve set aside high-power 40s 60s favor smaller craft seemed 400 now trend sorts Steve Kowalski shunt man attended BCRC Several years ago Steve started making current shunts himself friends simple devices connect series battery motor allow measurement high currents ordinary Digital Volt Meter see January 1993 column Steve still making shunts now available New Creations SR Batteries aspect meet made feel particularly good Several modelers approached about Skyvolt design MA January 1990 tell happy experiences its original form scaled up larger motors Others case about E Motion design described November 1995 May 1996 columnspressing Motion article modeler showed own attempt duplicate design memory after having seen two years ago Ive recently toying concept Skyvolt II presenting E Motion design everything takes time Well see Thank making feel good about airplanes Copies past articles available AIVIA HQ ext 506 reasonable cost can inquire specifics get whatever wish saved pastbut didnt Thus ends another column enjoy pleasure reward Electric aeromodeling can bring please enclose SASE correspondence youd like reply I ca C e TRUE Contributions DO Make Difference month list have donated $10 support Academys programs National Model Aviation Museum Aeromodeling Center people have made donationthey have made investment future aeromodeling see folks thank now among thousands have given back model aviation part what model aviation has given things will possible due thoughtful giving generosity list supporters monthly donations represent amounts processed month June 1998 name listed please write Membership Department include canceled check want recognize contributors Thank October1998 113
Edition: Model Aviation - 1998/10
Page Numbers: 112, 113
Edition: Model Aviation - 1998/10
Page Numbers: 112, 113
RADIO CONTROL ELECTRICS U -1] U J111-~ LL W II THIS MONTHS TOPICS include some followup Large Pack Slow Charger Pulse Mini-Lab articles reader input End Charge Beeper some observations 98 Burlington NJ meet Large Pack Slow Charger July 1997 MA offered two versions easy-to-build overnight charger large motor packs used example equalize cells such packs simply get fully charged ready go next days flying reader asked about slow-charging pack time Specifically wants charge three 10-cell 1000 mAh packs LPSC presented capable charging up 22 cells does know cells come whether individual cells large pack several packs series Since two packs readers example total 20 cells could simply series-connect charge away three packs would total 30 cells example charger would function total connected What LPSC can viewed being made up two electrical circuit functions AC power module full wave voltage doubler circuit attached output charge current circuit entirely possible have first function support two instead just second function Referring LPSC article Radio Shack power module diodes Dl D2 capacitors Cl C2 form first described function components provide basic DC voltages remainder slow charger operates second electrically functional group parts simply remaining partsthe transistor resistors LED etc could assemble additional such functional group also power connect first functional circuit result would LPSC two outputs based power module cost-effective approach since power module single expensive part two outputs could treated single output original design Two packs groups cells up 22 cells could slow-charged simultaneously reader could simultaneously charge up four 10-cell packs build double-output LPSC needs larger boxes described article also recommend using two output circuits power module has limitations its own approach easy economical way add considerable utility basic LPSC design Pulse Mini-Lab RC June 1998 MA multifunction device can measure RC system control pulse variation stick throw generate same signal behavior use servo electronic speed control ESC driver can both great accuracy using PML Electronic Speed Controls equipped BECs Battery Eliminator Circuits necessary open BEC 5 volt output wire ESC wire would normally supply power receiver servos Since PML internally battery powered necessary desirable have BEC output voltage also try power PML Whats needed adapter cable 5 volt wire connect PML BECIESC together BEC-equipped ESCs connect negative signal wires Pulse Mini-Lab attempt power already powered PML BEC regulator 112 Model Aviation in Bamert Mt Laurel NJ 275-inch 119-ounce Astro 02 brushless Speedy Blink miss itin vertical horizontal flight Stock Sig 1h-scale Cub Dennis Vollrath S Milwaukee WI Astro 90 16/2 pounds 36 Sanyo RC1700s 20 x 10 prop Liftoff 213 power easily does 10 minutes Dennis custom speed control Eighteen FETS form power section microprocessor control circuitry remotely located reader found omission Circuit Board Jumpers drawing article p 29 omission best seen looking Circuit Board Assembly drawing same page Note wire Q4 collector elsewhere boardits wire somehow disappeared Jumpers drawing reader also requested clarification installation diodes diodes installed shown black marking band against board anode wires coming off top standing diodes go elsewhere shown drawings reader expressed real appreciation PMLjust what needed testing nonlinear speed control idea End-of-Charge Beeper Beeper reader tells some folks flightline annoyed beeping sound another feels Electric should totally quiet beeping inconsistent Another reader has no hearing beeping does him no good anyway Two readers suggested flashing strobe light indicate end-of-charge Another feels flag indicator would work well him No promises Ill see what can some misunderstanding about applicability EOCB EOCBB circuits work peak-detect chargers chargers timer-controlled limited peak-detect chargers some think general charger shuts offno matter howthe battery-under-charge terminal voltage drops lack charging current drop what end-of-charge circuit senses Burlington NJ County RC Club held its annual Electric meet weekend May 30 usual nicely run affair good flying CD Paul Boxmeyer support crew did fine job everyone spoke afterward very complimentary about meet fact improvement made would should twoday affair rather single day Like KRC BCRC basically wet-power club some E-interestand willingness foresight field annual E-meet routinely encourage E-fliers wannabe E-fliers attend such meets Meets great place see Electrics usually great variety E-modelers normally share information quite conversational Such visits especially combined collecting E-columns feature articles provide enormous amount useful info help get air trouble-free first time BCRC meet lots offer anyone seeking learn about Electrics 29 participants seemed average two three airplanes pretty well covered Electric spectrum Models ranged rather small light docile through quite large awesome power estimated 70 aircraft present got notice Martin Bamerts new Speed 400-size pylon racer has probably just pushed state art 400 pylon appears 115-ounce composite craft its Astro 02 brushlesss power system would simply blow away other contenders least remember last years KRC some very best attendance think Martin now man catch quite few Speed 400-size craft kinds present others knowledge using can-type 400 motors None match brushless 02 popular because low cost 400-size craft included everything Tom Hunts Wing Watt pusher delta sorts several glider configurations lots between impression FMA Tetra combined FMA S80 S90 servos preferred installations airplanes Ivlartin smaller imported receiver described smallest world 400-size airplanes mostly used BEC either Jeti 05 Sprite 20 speed controller several even-lower-power craft easily flown day still conditions including Bill Gtiggs Bleriot awesome watch did count suspect lower-power smaller-airplane end Electric model spectrum dominated attendance Two very capable E-modelers indicated theyve set aside high-power 40s 60s favor smaller craft seemed 400 now trend sorts Steve Kowalski shunt man attended BCRC Several years ago Steve started making current shunts himself friends simple devices connect series battery motor allow measurement high currents ordinary Digital Volt Meter see January 1993 column Steve still making shunts now available New Creations SR Batteries aspect meet made feel particularly good Several modelers approached about Skyvolt design MA January 1990 tell happy experiences its original form scaled up larger motors Others case about E Motion design described November 1995 May 1996 columnspressing Motion article modeler showed own attempt duplicate design memory after having seen two years ago Ive recently toying concept Skyvolt II presenting E Motion design everything takes time Well see Thank making feel good about airplanes Copies past articles available AIVIA HQ ext 506 reasonable cost can inquire specifics get whatever wish saved pastbut didnt Thus ends another column enjoy pleasure reward Electric aeromodeling can bring please enclose SASE correspondence youd like reply I ca C e TRUE Contributions DO Make Difference month list have donated $10 support Academys programs National Model Aviation Museum Aeromodeling Center people have made donationthey have made investment future aeromodeling see folks thank now among thousands have given back model aviation part what model aviation has given things will possible due thoughtful giving generosity list supporters monthly donations represent amounts processed month June 1998 name listed please write Membership Department include canceled check want recognize contributors Thank October1998 113
