Radio Control: Electrics

RADIO CONTROL ELECTRICS Rich Flinchbaugh 28 E CS PRESENTS ison Ave Newport RI 02840 Rich interested both Electric planes boats far has several powered seven-cell systems would like meet up others area wbo share Electric interests get touch Ricb make some quiet power happencollectively month brings two new items attention First up new product Flightecthe speed control company time however its electronic its Electric Phil Thayerthe bosstells bes got new plane market Its 395-squareinch delta called Vee-olt 05a really neat-looking ship weighs about 32 ounces Its virgin foam material Phil says RTF ready-to-fly can ready three hours Price kit $28 plus $3 shipping handling direct expect get Vee-olt going soon myself can get yours Flightec 21 Juniper Way Hamilton NJ 08619 Next upin what seems like neverending stream bigger n better n beautiful catalogs-comes Hobby Lobbys newest-catalog #21 catalogs truly amazingmany top-notch color pix broad base modeling products including lots motors planes accessories Electric Folksthis recommended readingby can get yours free US inquiring Hobby Lobby 5614 Franklin Pike Circle Brentwood TN 37027 Tel 615 373-1444 Way back December 92 column mentioned E-modeling computer program developed reader Ken Rusnok program runs PC/DOS machines designed evaluate performance motor/propeller combinations Ken has informed hes now checked program out satisfaction using reader input performance info can obtain copy free sending 3- 5-inch disk virus free please prepaid disk mailer SASE Now ya just gotta admit great price have installed machine can get copy yours writing Ken Rusnok PO Box 4643 Fayetteville AR 72702 much neat com puting stuff coming along continue lament written PC/DOSthe concrete sailplane computer systems thing never ceases beginners keep seeing mail thats good Because case want periodically share some stuff experienced B-modelers usually know Left Details charge cord elec tronic stuff Prototype top used K&S brass strip heat sink Partially assembled board shows alternate commercial TO 200 heat sink Remaining hems photo loose parts third assembly Long LED lead goes power line mix em up 4-40 hardware Above Finished electronics Bob Kopskis charge cord #2 input/output wire used speaker wire 24-gauge RC other similar wire also okay Note wire dressing improved prototype 3/16-inch holes PC board provide strain relief leads Left Bob Kopskis charge cord use Senior Skyvolt charges itself See text details June1993 91 Above Close-up authors prototype charge cord Con nectors can changed easily other installations open-ended piece plastic coin holder forms protective housing assembly allows cooling air circulation Above Some winters Electric projects will discussed upcoming columns Left top simple stable low-cost line-operated charger 60-200 mA charge equalize one-cell 28-cell motor packs Next computer interface display motor voltage current rpm thrust battery charge discharge etc Right meter accessory measure motor/battery temperature much good info coming up plus make simple fold-up stand DMM charge cord front Above The BEP Micropeaker interfaced Bob Kopskis AstroFlight charger See last months column details ordering information works well about Such time now Ive chosen pursue situation often frustrates manyeven experiencedmodelers Specifically going see charging seven-cell packs car battery can anguishing times As part Id like suggest take look back May 1992 column related informationwhich also beginner level nature begin six-cell seven-cell power systems very popular reason availability large percentage Electric kits market use packs Examples include Electra Mirage PT Electric Challenger AeroLectric Eclipse planes normally used c-five motorswhatever areand c-fives run six- seven-cell packs Another reason popularity six- seven-cell power systems systems combine reasonable economy practicality smaller lower cost systems power systems afford model size power range can easily built carry radio equipment stand up against normal field experience betterie fragile Thus six- seven-cell systems OSs combined planes such above permit easy entry Electric model erswith practical model size thats affordable Finally lots lots six- seven-cell packs marketand chargers tooas driven relatively larger very competitive model car market drawback always Sometimes charging seven-cell packs economy chargers can downright frustrating fact routine modelers experience difficulty maintaining desired charge current level over charging time periodit just keeps dropping Sometimes can t attain desired current level begin Often charger takes blamebut usually thats just fair Heres story As Im writing Im peak charging two seven-cell packs bench next Pack 1 made up 14 AH SCRs current constant 5 amps Pack 2 900-mAb set SCRs constant current 35 amps Im monitoring pack voltages throughout charges results tabulated follows Continued page 130 - motor battery Top View PC lands x-ray vision Ri 407Kohm 1/4w PC board cut section RS 276-170 RS 276 2027 - receiver battery r battery k C C B Qi Tip 4 equi 50 iver battery R2 -56 ohm 114W Red LED [long lead 6 041 Heat sink Charge Cord Top View Pictorial 92 Model Aviation FonXR256 Motor Battery01To reooioe Frbotteiy -47K -0301 DL 4510000 VARIETY 1 MODEL PLANSALLPATTERNS INCLUDED SiLRSOT OP ILDP 2 DR SRII/IT EEL 10 55IC SE ARE 3IIDADV COrneD 6aSD22S2A3211$3o663445357$68 40VADgOD CODS FLI20$l030$2660$45 15CAD JTL0 JODAF213183232465331A s$L 16SLADOADA 31 ID22S2222 $3065345 294050 TOpDD.AADAL53122$2053346$40 90362 36AssKind LySADLIRD I2531E3711 $247533A100352L2~ 3500129 046A00500 23323$3268$66i 29ADDLOK 100 SpArC1511622113245 $3660 $A8 9$ $62 33Osin TDAmODDE3'33045 33890362120 375 39LOCk LighDg3A2731939 32678 $45 39COD F36 FLADLA18031528 32056$3L~ 112 356 25Ogi Core 020I/o1032027 32854 $473 554108168 30COn Coilno PAYSo5234018 361o 19CODLiSS NC- *6293669 $89 17Fokker 111 Fir1431221 316 $49 31Aeples ODDDoe119312171131435 $3247 54 70$56 13SLIpDDOLADEE 360153102211313'11$2660 $38[09 $52 36ODAD 0131051208145311113183 330SCALA PLANS 35LAsA CIDSDD All27 5711 53255 33813054 hoc $o6 3DAOOVD0gOD ElF30 2281333080$521FoRd 315 4oT60 2000 0110 FLyFoOL51 $A77352ASD 0170 365 387. OlicLe 11 AoS36523755352N o 325 $62 3ESoSSiCAoSAITAI7215337523022oS9$35AoL 026 62 37Cr Sovy SO3C1195182011324i 57336SLiD IDi 42 25COACOD 63C1 SI 113151161132033330AndiyFAgD 65 34bAg TDAOSp OC-3 47345 71$50~SAA DC3 64 33CArL 8006F6L-HI15$$I5231152273'3 36 32DoAliLilos 001112951710332237$3549346 7o350 31boo F403&4 1120155162203204113325911344 09 $58 32SprIld 0011006l33IA20$20S$3253044 80 558 32IODADLI AADNDIAD17951215931531326.A 6' 345 3TADORDO 06 AOSDDIi 3312191131639 $2852 00 78 $52 35How AD001116001161152393207$3264244 9$SA 33000 L2LA LAO 0061431521$20253263$45 04$50 35SKIosos 14 56727115163111$256254502$55123Y66 4200 MACSAIL AooC137952'1335A1550150365y Y4o 37iooDoon FTIl *1031024113229$3~790159 35 ALA 418o FAlI33$o0o953S0993750''Y 30THAI 8060 Teo13195132111318A3336 42CAo6IdIvrSD2C425525371133574$6[ Od IDLOOLD 4AT3053857348-11'$72 3100110000 AID Aoo3232283309635257 ADLI 221 IASA199328293405055570$60 ADADOOk F7C115531023932[47530633501 9365 2010 AADSIo 53036535.5i2I0096~ 169PAr 0407 lIOnS503o575356j odyL LALDILO2131031 $2201736 31boArd AAsFrir13121531530$30---y1 00542 31C SAarSolo F9C21253151952230335051510 76350 33A004050 C3 4P0182127 51139525I 30TADODDO IlLs SFbIlL032237 S3o01 2461 lo 556 3orIgnoL 1 11002053103130326s1133AI M 7411440 r leveland Model Supply Co 0 R701311111 98006 DETROIT AVENUE CLEVELAND OHIO 44lD2~ READ BEFORE ORDERING03/8 SCALE 77/12 LIZEI PLAN 07410. 00S 5' 00 OF IDE 70 00 THE 50*o AVAILABLE ATONE DOLLAR* * R THE 5/2 SCALE 10 FOR PACKAGING POST DS FOR ALL DESIGNS* AGE ASS IOSUD*NCE--ADOUT 079005705 400 710301 PLANS MANY $17150 , 128Tn 580 CATALOG 1100 OR ORCE LIST ALONE 51 5030 0001 ID FOREIGN 100 CAN &T0EO 53 R/C Flight Simulator IBM PC5s & Compatibles Excellent flight equations Superb graphics Several styles aircraft Easily set up fly like bird features aid learning Skylark realistic R/O Helicopter flight simulator available today Call Now 313 662-LARK Airplane version coming soon 130 Model Aviation lectrics/Kopski Continued page 92 Time281215Peak/Mm%Var Pack 1 V10021037104710741102/1723 lV198163153126098100 Pack 2 V10211029103810471064/1750 A2V179171162153 13630 ITm going consider numbers tooperation clear data typical Other packs will course showpercentage voltage difference variation % somewhat different numbers its theVar can dramaticT say least trends countFolksso also goes charge current simple low-cost charger usually tion its clear things would consists clock timer device some kindget much worse either actual car simple current-control current-settingbattery voltage tower motor devicelike fixed variable resistor orbattery voltage higher Indeed its resistor-controlled transistor meter andentirely possible have car battery necessary wire connectors Thevoltage lowespecially older charger input connected autoonesthat just cant get desired battery output model packcharge current value begin fact Lets say car battery holding steady atthis can gradually happen during flying its classic terminal voltage level 120session more charge taken volts can vary motor pack isfrom auto battery now being charged ummary fewer seven cells Now take look battery pack volt-are easier charge seven can real ages table during course thechallenge course charging eight charge ignoring fact beingcells simple charger simply charged other low-cost charger Itworth discussing What comes down clear packs gradually increaseto closer motor battery voltage voltageno surprise allapproaches source voltage supposed tono matter chargergreater desired charge current value means difference volt-harder attain maintain So now age between auto battery motoryou knowand can stop kicking battery decreases time table givescharger muttering nasties what values 1 2 respectivelyto Now realize charge current cant set hold preferred determined voltage drop cir-current level simple charger cuit resistance Thus decliningseven-cell pack run car engine voltage difference above currentto charge car battery readjust current must drop accordingly As always thesetting necessary see helps Alcase life difference between twotematively can opt use lower current large numbers close value sensitivelevel wait extra time required function stability eitheras strongly reconunend keepfollowsing connections clean tightits Assume charge currents set toimportant includes connections desired value first two minutes ofboth car battery motor batRecognisedCSA Cernif ledAndeRsen Pile NoSH FiIH No E26226 LR25154prOdaCEsESD OTIV CHrEiO Led checks DT monEy ordHTs accepted Minimom oTder $1400 fAR three peokeges 4 PowHpolHs $400 per package * $200 shipping handling CT residents add sales tell Prices SUIIHCE ohange withoAt flDTiCH DEALER EPJOuEREEs ENVETED EUtfTer information dHaIHr prices send SASE BAsinoss CaTd SERMOS R/C SNAP CONNECTORS0 Inc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 RC Flight Training Beginner advanced tailored individual long-time modeler full size airplane flight instruc tor will make progress fun easy during week stay beautiful far western North Carolina Write call information RC Fight Training 7O4 3BB6B tery forget charging cigarette lighterthats usually just practical course sophisticated charger constant-current device employing voltageboost circuitry best way around problembut its no longer simple inexpensive Whateverplenty modelers manage gets lots great flying seven cells simple chargers dont feel cant ever done Sometimes charging radio batteries can also real nuisancebut discussion above true planes has therefore greater number receiver batteries need care feeding Normally have least several Electrics stacked up ready go Im familiar situation reason Ive using charge cord idea shown hereinand getting convenient radio battery charge free sorta planes await call blue call self-charge challenge wet crowd beat Normally land Electric some charge still left motor battery Its enough fly plane can serve useful purpose will see Also almost planes seven cells upand important too Finally radio packs 250 mAbso never takes much fill em up never actually empty anyway takes less top em off situation just begs thought charge radio pack motor pack Hmmmmm Self-chargesorta challenge use quite variety motor cell counts Seven eight 10 12 14 16 18 cells common hangar course receiver packs always four cells So does make charge device use wide range conditions Enter charge cord charge cord simple electronic assembly delivers about 21-23 mA receiver pack abovementioned onboard motor batteries after flying day done thats needed have some charge remaining motor packor put few minutes worthbefore putting plane away have three such cords routinely use charge radio pack within plane itself plane another Also above never happens plan run down radio packI normally use part its capacity Thus full overnight charge classic 14-hour 16-hour kind virtually never needed anyway remains nonetheless quite doable means charge cord can used needed depending variables other hand doesnt matter its put forgotten merely drains motor battery below useful levels thats So far Ive seen adverse consequences charge cord can outfitted suitable connectors use given installation case planes outfitted coaxial power plug/jack popularized Astro past years motor battery charge plugs always model surface always directly connected batteryso just plug charge cord Similarly receiver packs charged via standard Vs-inch phone jack Ijust plug charge cord Thus charge cords identical have two simple connectors give try just substitute proper motor pack connector receiver pack connector plane radio Now works charge cord actually simple electronic current regulator maintains nearly constant output current independent number cells motor battery between seven 24 other words doesnt matter motor packs plug about 22 mA comes out As can seen schematic resistor RI red LED connected across leads source battery cord use LED brightness varies cell count actual voltage across LED itself remains relatively constant about 18 2 volts Thus LED acts somewhat like voltage reference Transistor Qls base connected RI-LED juncture operational FIX IT YOURSELF Easy use Save Money As Save Time low $995 wriie CallSmithy Dept MA 1 -800-345-6342Lathe l 3023 E 2nd Street Ask operator MAThe Ballet OR 97058 nA.IY rR/C GOODIES Cochran St Suite 281 805 581-5061 Simi Valley Ca 93085 0 L ACCESSORIES 93 SPAN NOW IN 36 & 72LENGTHS 1a aa a 0 TC 4-a 01a LITESrAN ALniALUL LE THIS QUANTITY AYLOR POWER PACER 0 i-twr TC ruNEGREAT AIRPLANES R CHARGES &CYCLESTX&RX ERIESSHOWSPsea BATTERY CAPACIa INING WARNS OF BADCELLS INPACK BEFORE ATTEMPTING TO FLY AIRCRAFT IL $8995 SPEC $7995 SHIP INOL ALL ITEMS ADD LOCAL SALES TAX IN CA CATALOG $100 USA $300 FOREIGN RICES ARE CASH VISA CARDS 6% MORE 20% DEPOSIT-COD a a. June1993 131 PLANE VIDEO GIVES YOU LIBRARY OF VIDEOS ON THE CONSTRUCTION OF RADIO CONTROLLED AIRPLANES WITH EASY TO FOLLOW INSTRUCTIONS NEW IINEW ft TECHNIOVES WITH FIBERGLASS 2-HOUR VIDEO ON ALL ASPECTS OF CONSTRUCTING FIBERGLASS FUSELAGES CLASSING IN FORMERS INSTALLING HATCHES ALIGNING THE TAIL AND WING FILLING PIN HOLES PRIMING AND PAINTING 1995 $300 shipping t$80O foreign orders BUILDING WITH FOAM 2-HOUR VIDEO PROVIDING INFORMATION ON FOAM WING CORES INSTALLING RETRACTS COVERING WITH FG CLOIH PRIMING PAINTING AND DETAILING $1995 shipping $800 foreign orders BUILDING IT RIGHT THEFIUm 2-2 HOUR VIDEOS SHOWING ALL DETAILS NECESSARY TO CONSTRUCT WOOD AJRCRAPr INCLUDING WING CONSTRUCTION RADIO INSTALLATION PUSHRODS ALIGNMENT BALANCING AND MUCH MORE $3495 shipping $800 foreign orders TAPESAVAILABLEIN jJj ONLY SEND CHECK OR MO TO PLANE VIDEO PO BOX 23128 CLI VE IA 80325 OR CALL 1-800-383-8251 24 HR TOLL FREE OR 516-223-0879 IOWA RESIOENTS PLEASE AOO 5% SALES TAX MARC SHOW * NOW FULLY AIRCONDITIONED * MID ATLANTIC RADIO CONTROL JUNE 5 61993 Saturday9 am 5pm Sunday 10am 4pm MARYLAND STATE FAIRGROUNDSOverlOOManufacurers TIMONIUMMARYLANDStaticDisplays Swapshop Sponsored bi1 ElAN flNRadioKit&EquipmentRaffle IVIUIwjJDoorPrizes INCFree Parking for5000 Cars RefreshmentCenters Indoor&OutdoorDemonstrations byFactoryTeams TO WILMINGTONAircraft Cars Boats Radios-Enghws TransmitterTesting 9OOOGallonOutdoorBoatPond R/CCarRacing IAS ALWAYS AII SELLING SHOW NORTH ______________________________________________ PADONIA RD TO FREDRICK TIMONIUM RD BALTIMORE BALTO WASH PKWY TO WASHINGTON sees stable voltage relative positive line receiver pack connected collector circuit current will flow base emitter drop about 07 volts voltage appearing across emitter resistor R2 about 13 volts Note voltage essentially independent applied circuit voltageie number donor motor pack cells So R2 equal 56 ohms approximately 22 milliamps flows emitter thus collector transistor Ql radio battery As incidental current quite temperature-stable because LED base-emitter temperature responses cancel other out no radio battery plugged no collector current LED would go out though source voltage still present because no current flow collector Qi baseemitter resistor R2 would merely act shunt current R 1 past LED Neat huh would still some current draining motor battery keep mind Nowwhat happens source battery runs down too far below seven cells worth Obviously 22 mA drops value thats receiver pack should charged anywayassuming enough leftover charge motor begin After doesnt matter Ive left cords place weeksno problem As some numbers lets assume 250-mA radio pack half-empty Twenty-two mA should fill er up about six hours about 132 milliampere-minutes motor battery made up 14 Ab cells would have one-tenth charged job charge cord assembly quite simple Except specific connectors resistor R2 electronic parts can obtained Radio Shack RS stock Also according catalog RS can special-order needed 56-ohm resistor As housing used section plastic coin holderdime size snug fit over heat sinkspread Just follow photos drawing work carefully feel doubtful about what youre doing have knowledgeable friend look over just dont smoke somethingespecially proceed try As checkout cord plugged motor battery nothing should happenthe LED remains off Next plug receiver battery LED should light should well good idea first-time verify charge current level temporarily inserting current meter receiver pack charge lead Considering tolerances Id expect reasonable current range about 20-24 mA nearly cases motor packs described should So much June RC Electrics seen January 31 today Please send SASE correspondence wish reply Happy Quiet E-Powered Flights n Excellent Landings Model Aviation INFORMATION CONTACT ShowDirectors RON STAHL 4521 Bellvieu Ave Baltimore MD 21215 410-664-2712 DAVE MITCHELL 410-668-6690 SWAP SHOP 510 FULL TABLE PER DAY NO DEALERS PLEASE Limit 2 tables per person -SWAP SHOP ONLYFor Pro-Registration call DON HANDS 410 788-5962 evenings 2I 4 S I

RADIO CONTROL ELECTRICS Rich Flinchbaugh 28 E CS PRESENTS ison Ave Newport RI 02840 Rich interested both Electric planes boats far has several powered seven-cell systems would like meet up others area wbo share Electric interests get touch Ricb make some quiet power happencollectively month brings two new items attention First up new product Flightecthe speed control company time however its electronic its Electric Phil Thayerthe bosstells bes got new plane market Its 395-squareinch delta called Vee-olt 05a really neat-looking ship weighs about 32 ounces Its virgin foam material Phil says RTF ready-to-fly can ready three hours Price kit $28 plus $3 shipping handling direct expect get Vee-olt going soon myself can get yours Flightec 21 Juniper Way Hamilton NJ 08619 Next upin what seems like neverending stream bigger n better n beautiful catalogs-comes Hobby Lobbys newest-catalog #21 catalogs truly amazingmany top-notch color pix broad base modeling products including lots motors planes accessories Electric Folksthis recommended readingby can get yours free US inquiring Hobby Lobby 5614 Franklin Pike Circle Brentwood TN 37027 Tel 615 373-1444 Way back December 92 column mentioned E-modeling computer program developed reader Ken Rusnok program runs PC/DOS machines designed evaluate performance motor/propeller combinations Ken has informed hes now checked program out satisfaction using reader input performance info can obtain copy free sending 3- 5-inch disk virus free please prepaid disk mailer SASE Now ya just gotta admit great price have installed machine can get copy yours writing Ken Rusnok PO Box 4643 Fayetteville AR 72702 much neat com puting stuff coming along continue lament written PC/DOSthe concrete sailplane computer systems thing never ceases beginners keep seeing mail thats good Because case want periodically share some stuff experienced B-modelers usually know Left Details charge cord elec tronic stuff Prototype top used K&S brass strip heat sink Partially assembled board shows alternate commercial TO 200 heat sink Remaining hems photo loose parts third assembly Long LED lead goes power line mix em up 4-40 hardware Above Finished electronics Bob Kopskis charge cord #2 input/output wire used speaker wire 24-gauge RC other similar wire also okay Note wire dressing improved prototype 3/16-inch holes PC board provide strain relief leads Left Bob Kopskis charge cord use Senior Skyvolt charges itself See text details June1993 91 Above Close-up authors prototype charge cord Con nectors can changed easily other installations open-ended piece plastic coin holder forms protective housing assembly allows cooling air circulation Above Some winters Electric projects will discussed upcoming columns Left top simple stable low-cost line-operated charger 60-200 mA charge equalize one-cell 28-cell motor packs Next computer interface display motor voltage current rpm thrust battery charge discharge etc Right meter accessory measure motor/battery temperature much good info coming up plus make simple fold-up stand DMM charge cord front Above The BEP Micropeaker interfaced Bob Kopskis AstroFlight charger See last months column details ordering information works well about Such time now Ive chosen pursue situation often frustrates manyeven experiencedmodelers Specifically going see charging seven-cell packs car battery can anguishing times As part Id like suggest take look back May 1992 column related informationwhich also beginner level nature begin six-cell seven-cell power systems very popular reason availability large percentage Electric kits market use packs Examples include Electra Mirage PT Electric Challenger AeroLectric Eclipse planes normally used c-five motorswhatever areand c-fives run six- seven-cell packs Another reason popularity six- seven-cell power systems systems combine reasonable economy practicality smaller lower cost systems power systems afford model size power range can easily built carry radio equipment stand up against normal field experience betterie fragile Thus six- seven-cell systems OSs combined planes such above permit easy entry Electric model erswith practical model size thats affordable Finally lots lots six- seven-cell packs marketand chargers tooas driven relatively larger very competitive model car market drawback always Sometimes charging seven-cell packs economy chargers can downright frustrating fact routine modelers experience difficulty maintaining desired charge current level over charging time periodit just keeps dropping Sometimes can t attain desired current level begin Often charger takes blamebut usually thats just fair Heres story As Im writing Im peak charging two seven-cell packs bench next Pack 1 made up 14 AH SCRs current constant 5 amps Pack 2 900-mAb set SCRs constant current 35 amps Im monitoring pack voltages throughout charges results tabulated follows Continued page 130 - motor battery Top View PC lands x-ray vision Ri 407Kohm 1/4w PC board cut section RS 276-170 RS 276 2027 - receiver battery r battery k C C B Qi Tip 4 equi 50 iver battery R2 -56 ohm 114W Red LED [long lead 6 041 Heat sink Charge Cord Top View Pictorial 92 Model Aviation FonXR256 Motor Battery01To reooioe Frbotteiy -47K -0301 DL 4510000 VARIETY 1 MODEL PLANSALLPATTERNS INCLUDED SiLRSOT OP ILDP 2 DR SRII/IT EEL 10 55IC SE ARE 3IIDADV COrneD 6aSD22S2A3211$3o663445357$68 40VADgOD CODS FLI20$l030$2660$45 15CAD JTL0 JODAF213183232465331A s$L 16SLADOADA 31 ID22S2222 $3065345 294050 TOpDD.AADAL53122$2053346$40 90362 36AssKind LySADLIRD I2531E3711 $247533A100352L2~ 3500129 046A00500 23323$3268$66i 29ADDLOK 100 SpArC1511622113245 $3660 $A8 9$ $62 33Osin TDAmODDE3'33045 33890362120 375 39LOCk LighDg3A2731939 32678 $45 39COD F36 FLADLA18031528 32056$3L~ 112 356 25Ogi Core 020I/o1032027 32854 $473 554108168 30COn Coilno PAYSo5234018 361o 19CODLiSS NC- *6293669 $89 17Fokker 111 Fir1431221 316 $49 31Aeples ODDDoe119312171131435 $3247 54 70$56 13SLIpDDOLADEE 360153102211313'11$2660 $38[09 $52 36ODAD 0131051208145311113183 330SCALA PLANS 35LAsA CIDSDD All27 5711 53255 33813054 hoc $o6 3DAOOVD0gOD ElF30 2281333080$521FoRd 315 4oT60 2000 0110 FLyFoOL51 $A77352ASD 0170 365 387. OlicLe 11 AoS36523755352N o 325 $62 3ESoSSiCAoSAITAI7215337523022oS9$35AoL 026 62 37Cr Sovy SO3C1195182011324i 57336SLiD IDi 42 25COACOD 63C1 SI 113151161132033330AndiyFAgD 65 34bAg TDAOSp OC-3 47345 71$50~SAA DC3 64 33CArL 8006F6L-HI15$$I5231152273'3 36 32DoAliLilos 001112951710332237$3549346 7o350 31boo F403&4 1120155162203204113325911344 09 $58 32SprIld 0011006l33IA20$20S$3253044 80 558 32IODADLI AADNDIAD17951215931531326.A 6' 345 3TADORDO 06 AOSDDIi 3312191131639 $2852 00 78 $52 35How AD001116001161152393207$3264244 9$SA 33000 L2LA LAO 0061431521$20253263$45 04$50 35SKIosos 14 56727115163111$256254502$55123Y66 4200 MACSAIL AooC137952'1335A1550150365y Y4o 37iooDoon FTIl *1031024113229$3~790159 35 ALA 418o FAlI33$o0o953S0993750''Y 30THAI 8060 Teo13195132111318A3336 42CAo6IdIvrSD2C425525371133574$6[ Od IDLOOLD 4AT3053857348-11'$72 3100110000 AID Aoo3232283309635257 ADLI 221 IASA199328293405055570$60 ADADOOk F7C115531023932[47530633501 9365 2010 AADSIo 53036535.5i2I0096~ 169PAr 0407 lIOnS503o575356j odyL LALDILO2131031 $2201736 31boArd AAsFrir13121531530$30---y1 00542 31C SAarSolo F9C21253151952230335051510 76350 33A004050 C3 4P0182127 51139525I 30TADODDO IlLs SFbIlL032237 S3o01 2461 lo 556 3orIgnoL 1 11002053103130326s1133AI M 7411440 r leveland Model Supply Co 0 R701311111 98006 DETROIT AVENUE CLEVELAND OHIO 44lD2~ READ BEFORE ORDERING03/8 SCALE 77/12 LIZEI PLAN 07410. 00S 5' 00 OF IDE 70 00 THE 50*o AVAILABLE ATONE DOLLAR* * R THE 5/2 SCALE 10 FOR PACKAGING POST DS FOR ALL DESIGNS* AGE ASS IOSUD*NCE--ADOUT 079005705 400 710301 PLANS MANY $17150 , 128Tn 580 CATALOG 1100 OR ORCE LIST ALONE 51 5030 0001 ID FOREIGN 100 CAN &T0EO 53 R/C Flight Simulator IBM PC5s & Compatibles Excellent flight equations Superb graphics Several styles aircraft Easily set up fly like bird features aid learning Skylark realistic R/O Helicopter flight simulator available today Call Now 313 662-LARK Airplane version coming soon 130 Model Aviation lectrics/Kopski Continued page 92 Time281215Peak/Mm%Var Pack 1 V10021037104710741102/1723 lV198163153126098100 Pack 2 V10211029103810471064/1750 A2V179171162153 13630 ITm going consider numbers tooperation clear data typical Other packs will course showpercentage voltage difference variation % somewhat different numbers its theVar can dramaticT say least trends countFolksso also goes charge current simple low-cost charger usually tion its clear things would consists clock timer device some kindget much worse either actual car simple current-control current-settingbattery voltage tower motor devicelike fixed variable resistor orbattery voltage higher Indeed its resistor-controlled transistor meter andentirely possible have car battery necessary wire connectors Thevoltage lowespecially older charger input connected autoonesthat just cant get desired battery output model packcharge current value begin fact Lets say car battery holding steady atthis can gradually happen during flying its classic terminal voltage level 120session more charge taken volts can vary motor pack isfrom auto battery now being charged ummary fewer seven cells Now take look battery pack volt-are easier charge seven can real ages table during course thechallenge course charging eight charge ignoring fact beingcells simple charger simply charged other low-cost charger Itworth discussing What comes down clear packs gradually increaseto closer motor battery voltage voltageno surprise allapproaches source voltage supposed tono matter chargergreater desired charge current value means difference volt-harder attain maintain So now age between auto battery motoryou knowand can stop kicking battery decreases time table givescharger muttering nasties what values 1 2 respectivelyto Now realize charge current cant set hold preferred determined voltage drop cir-current level simple charger cuit resistance Thus decliningseven-cell pack run car engine voltage difference above currentto charge car battery readjust current must drop accordingly As always thesetting necessary see helps Alcase life difference between twotematively can opt use lower current large numbers close value sensitivelevel wait extra time required function stability eitheras strongly reconunend keepfollowsing connections clean tightits Assume charge currents set toimportant includes connections desired value first two minutes ofboth car battery motor batRecognisedCSA Cernif ledAndeRsen Pile NoSH FiIH No E26226 LR25154prOdaCEsESD OTIV CHrEiO Led checks DT monEy ordHTs accepted Minimom oTder $1400 fAR three peokeges 4 PowHpolHs $400 per package * $200 shipping handling CT residents add sales tell Prices SUIIHCE ohange withoAt flDTiCH DEALER EPJOuEREEs ENVETED EUtfTer information dHaIHr prices send SASE BAsinoss CaTd SERMOS R/C SNAP CONNECTORS0 Inc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 RC Flight Training Beginner advanced tailored individual long-time modeler full size airplane flight instruc tor will make progress fun easy during week stay beautiful far western North Carolina Write call information RC Fight Training 7O4 3BB6B tery forget charging cigarette lighterthats usually just practical course sophisticated charger constant-current device employing voltageboost circuitry best way around problembut its no longer simple inexpensive Whateverplenty modelers manage gets lots great flying seven cells simple chargers dont feel cant ever done Sometimes charging radio batteries can also real nuisancebut discussion above true planes has therefore greater number receiver batteries need care feeding Normally have least several Electrics stacked up ready go Im familiar situation reason Ive using charge cord idea shown hereinand getting convenient radio battery charge free sorta planes await call blue call self-charge challenge wet crowd beat Normally land Electric some charge still left motor battery Its enough fly plane can serve useful purpose will see Also almost planes seven cells upand important too Finally radio packs 250 mAbso never takes much fill em up never actually empty anyway takes less top em off situation just begs thought charge radio pack motor pack Hmmmmm Self-chargesorta challenge use quite variety motor cell counts Seven eight 10 12 14 16 18 cells common hangar course receiver packs always four cells So does make charge device use wide range conditions Enter charge cord charge cord simple electronic assembly delivers about 21-23 mA receiver pack abovementioned onboard motor batteries after flying day done thats needed have some charge remaining motor packor put few minutes worthbefore putting plane away have three such cords routinely use charge radio pack within plane itself plane another Also above never happens plan run down radio packI normally use part its capacity Thus full overnight charge classic 14-hour 16-hour kind virtually never needed anyway remains nonetheless quite doable means charge cord can used needed depending variables other hand doesnt matter its put forgotten merely drains motor battery below useful levels thats So far Ive seen adverse consequences charge cord can outfitted suitable connectors use given installation case planes outfitted coaxial power plug/jack popularized Astro past years motor battery charge plugs always model surface always directly connected batteryso just plug charge cord Similarly receiver packs charged via standard Vs-inch phone jack Ijust plug charge cord Thus charge cords identical have two simple connectors give try just substitute proper motor pack connector receiver pack connector plane radio Now works charge cord actually simple electronic current regulator maintains nearly constant output current independent number cells motor battery between seven 24 other words doesnt matter motor packs plug about 22 mA comes out As can seen schematic resistor RI red LED connected across leads source battery cord use LED brightness varies cell count actual voltage across LED itself remains relatively constant about 18 2 volts Thus LED acts somewhat like voltage reference Transistor Qls base connected RI-LED juncture operational FIX IT YOURSELF Easy use Save Money As Save Time low $995 wriie CallSmithy Dept MA 1 -800-345-6342Lathe l 3023 E 2nd Street Ask operator MAThe Ballet OR 97058 nA.IY rR/C GOODIES Cochran St Suite 281 805 581-5061 Simi Valley Ca 93085 0 L ACCESSORIES 93 SPAN NOW IN 36 & 72LENGTHS 1a aa a 0 TC 4-a 01a LITESrAN ALniALUL LE THIS QUANTITY AYLOR POWER PACER 0 i-twr TC ruNEGREAT AIRPLANES R CHARGES &CYCLESTX&RX ERIESSHOWSPsea BATTERY CAPACIa INING WARNS OF BADCELLS INPACK BEFORE ATTEMPTING TO FLY AIRCRAFT IL $8995 SPEC $7995 SHIP INOL ALL ITEMS ADD LOCAL SALES TAX IN CA CATALOG $100 USA $300 FOREIGN RICES ARE CASH VISA CARDS 6% MORE 20% DEPOSIT-COD a a. June1993 131 PLANE VIDEO GIVES YOU LIBRARY OF VIDEOS ON THE CONSTRUCTION OF RADIO CONTROLLED AIRPLANES WITH EASY TO FOLLOW INSTRUCTIONS NEW IINEW ft TECHNIOVES WITH FIBERGLASS 2-HOUR VIDEO ON ALL ASPECTS OF CONSTRUCTING FIBERGLASS FUSELAGES CLASSING IN FORMERS INSTALLING HATCHES ALIGNING THE TAIL AND WING FILLING PIN HOLES PRIMING AND PAINTING 1995 $300 shipping t$80O foreign orders BUILDING WITH FOAM 2-HOUR VIDEO PROVIDING INFORMATION ON FOAM WING CORES INSTALLING RETRACTS COVERING WITH FG CLOIH PRIMING PAINTING AND DETAILING $1995 shipping $800 foreign orders BUILDING IT RIGHT THEFIUm 2-2 HOUR VIDEOS SHOWING ALL DETAILS NECESSARY TO CONSTRUCT WOOD AJRCRAPr INCLUDING WING CONSTRUCTION RADIO INSTALLATION PUSHRODS ALIGNMENT BALANCING AND MUCH MORE $3495 shipping $800 foreign orders TAPESAVAILABLEIN jJj ONLY SEND CHECK OR MO TO PLANE VIDEO PO BOX 23128 CLI VE IA 80325 OR CALL 1-800-383-8251 24 HR TOLL FREE OR 516-223-0879 IOWA RESIOENTS PLEASE AOO 5% SALES TAX MARC SHOW * NOW FULLY AIRCONDITIONED * MID ATLANTIC RADIO CONTROL JUNE 5 61993 Saturday9 am 5pm Sunday 10am 4pm MARYLAND STATE FAIRGROUNDSOverlOOManufacurers TIMONIUMMARYLANDStaticDisplays Swapshop Sponsored bi1 ElAN flNRadioKit&EquipmentRaffle IVIUIwjJDoorPrizes INCFree Parking for5000 Cars RefreshmentCenters Indoor&OutdoorDemonstrations byFactoryTeams TO WILMINGTONAircraft Cars Boats Radios-Enghws TransmitterTesting 9OOOGallonOutdoorBoatPond R/CCarRacing IAS ALWAYS AII SELLING SHOW NORTH ______________________________________________ PADONIA RD TO FREDRICK TIMONIUM RD BALTIMORE BALTO WASH PKWY TO WASHINGTON sees stable voltage relative positive line receiver pack connected collector circuit current will flow base emitter drop about 07 volts voltage appearing across emitter resistor R2 about 13 volts Note voltage essentially independent applied circuit voltageie number donor motor pack cells So R2 equal 56 ohms approximately 22 milliamps flows emitter thus collector transistor Ql radio battery As incidental current quite temperature-stable because LED base-emitter temperature responses cancel other out no radio battery plugged no collector current LED would go out though source voltage still present because no current flow collector Qi baseemitter resistor R2 would merely act shunt current R 1 past LED Neat huh would still some current draining motor battery keep mind Nowwhat happens source battery runs down too far below seven cells worth Obviously 22 mA drops value thats receiver pack should charged anywayassuming enough leftover charge motor begin After doesnt matter Ive left cords place weeksno problem As some numbers lets assume 250-mA radio pack half-empty Twenty-two mA should fill er up about six hours about 132 milliampere-minutes motor battery made up 14 Ab cells would have one-tenth charged job charge cord assembly quite simple Except specific connectors resistor R2 electronic parts can obtained Radio Shack RS stock Also according catalog RS can special-order needed 56-ohm resistor As housing used section plastic coin holderdime size snug fit over heat sinkspread Just follow photos drawing work carefully feel doubtful about what youre doing have knowledgeable friend look over just dont smoke somethingespecially proceed try As checkout cord plugged motor battery nothing should happenthe LED remains off Next plug receiver battery LED should light should well good idea first-time verify charge current level temporarily inserting current meter receiver pack charge lead Considering tolerances Id expect reasonable current range about 20-24 mA nearly cases motor packs described should So much June RC Electrics seen January 31 today Please send SASE correspondence wish reply Happy Quiet E-Powered Flights n Excellent Landings Model Aviation INFORMATION CONTACT ShowDirectors RON STAHL 4521 Bellvieu Ave Baltimore MD 21215 410-664-2712 DAVE MITCHELL 410-668-6690 SWAP SHOP 510 FULL TABLE PER DAY NO DEALERS PLEASE Limit 2 tables per person -SWAP SHOP ONLYFor Pro-Registration call DON HANDS 410 788-5962 evenings 2I 4 S I