Radio Control Electrics Bob Kopski MANY modelers use trunk car back station wagon hangar maintenance depot theyre flying field Electric fliers have rather special need comes such usage want talk about month charging connections accessorIes car Theres quite bit interest shown readers March column Among other things column pictured discussed wiring installation made auto battery may recall wrote running heavy cabling directly battery rear station wagon cause thats fly out column photo showed connection scheme battery end may wondering about other end Astro sells 1 very useful Switchoraft connector sets jacks pin 4030 plugs 4029 Theyre $250 eachand well worth iti make charlnconnectlons very convenient Mount jack lower right plane leftover solder lug unused rightmost Plus 5 x oclock Negative Use No 20 22 wires battery pack flight-line charging battery can Improved couple replacement battery clamps autoparts store R Discard clamp-strap cable bolts replacing bolt longer jamnut long bolt good place clamp-on charger battery clip heres what did After considering lot possibilities finally decided use ordinary household outlets plugs 12 volt connec tions choice driven ready availability low cost familiar connectors chose three-prong 'grounded' variety eliminate possibility plugging two-prong ver sion backward Electrically used blade connections third ground connection As side note four previouslydescribed six No 12 conductors wired four positive screws two duplex outlets seen photo A-in ID soft copper pipe serves con duit also carries negative ground side battery front 46 Model Aviation Bob has charge receptacle box back station wagon uses two standard household dual sockets total four outputs BUT safetys sake mainly couldnt ever plug charger chord house wiring home workshop modified both plug recetacie grounding prong plug has enlarged short length /4-in 0 D bras tubing sweat-soldered place wont fit standard socket now pin has no electrical function Bobs system Hes drilled out car-receptacles %2-in dIameter using several intermediate-size drills Make sure shake out metal pies tic shards before using Take close look bore too touch-up needed 4-output charge-receptacle back Bob Kopskis station wegon Color-code paint redlpositive biackinegative Marc h 1985 column rear car Six local No 12 wires clamped pipe wheel well four go four negative screws pictured outlets six positive lines individually fused up near battery pipe connected negative battery post single massive auto-starter cable back main story concerns easy choice connec tors possibility accidentally plugging charger cordoutfitted ordinary three-prong household plug household wiring could see clearly pile stuff bench pick up charger input lead instead soldering iron wire plug HEATbut iron solution make scenario impossible done pictured soldered short piece A-in OD hobby shop brass tubing over unused ground prong male plug Remember active connection carefully drilled out mating connec tion sockets A2 course some grinding groaning metal contact fingers inside wanted clear hole allow now-oversized plug pin fit same pin able fit ordinary unmodified household outlet thus pro viding protection wanted As inadvertently plugging some inappropriate plug auto outlets much chance should have ap pliances car anyway besides did wrong deed theres generally minimal risk associated applying 12 volts DC ordinary 115 volt AC device plane Charger connections model battery yet another story photographs shows connector pair made Switchcraft Switchcraft parts introduced us Astro supplied charger connections Astro systems course parts available individually Astro through some electronics dis tributors well Over years have found plugs sockets very convenient reliable am using planes Im prejudicing possibility being something better Im looking Lets look first socket jack receptacle very easy install use mounts single round 5A-in holeeasily cut balsa fuselage side sharpened piece brass tubing Once installed its neat unobtrusive Best its always handy Continued page 135 CHARGE-SPLITTER SCHEMATIC DIAGRAM FROMI CHARGER ~A Ii OUTPUTr~B B __ B CHARGE JACK RE NUT TO PLANE #2 _ B CHARGE JACK SKETCH ILLUSTRATES HOW SOLDER LUGS OF SPLITTER JACKS ARE TIED TOGETHER YOU WANT THE 2 AIRBORNE PACKS CHARGED IN SERIES NOT IN PARALLEL charge splitter described text designed charge two planes once using charge systems described May June columns As shown device uses 3 SwItchcraft plugs jacks plastic 35mm film can some wire 51mph fled wiring schematic R presented show 2 output plugs wired seriesthe same current goes both planes TechmCa advice KAVAN DISTRIBUTED BY ~p LTD 4660 BOUL DECARIE BLVD MONTREAL QUE H3X 2H5 CANADA TEL 514 481-8107 CANADIAN DISTRIBUTORS OF 05 MAX FUTABA SUPER TIGRE PILOT GRAUPNER TOPP AYK R/C PLANES R/C BOATS DEALER INQUIRIES INVITED ALOUE1TE2 fixed pitch Special $19900 US ing LOCKHEED 286 L Rigid ective pitch Special $58900 US ping PRICES ARE GOOD ON ORDERS RECEIVED BY THE 1st OF THE MONTH OF THIS ISSUE ONLY July1985 47 svaiIabIe RANGER collective pitch Special $29800 US shipping * * HOURS MONDAY THRU FRIDAY9AM -5PM EASTERN TIME * * K~ - Hosted Indian City Radio Control Club Raffle Ready Fly GPM 540 CAP 21 Less Radio BY Great Planes Model Mfg Co Zenoah G 380 Engine World Engines K & B Super Poxy Finish BY K & B Manufacturing Inc DETROIT EXPO VII Greater Michigan Modelers Show Benjamin F Yack Recreation Center 3131 Third Street Wyandotte Michigan August 24 & 25 MANUFACTURERS STATIC DISPLAYS SWAP-SHOP CASH AWARDS OF SHOW FOR PLANES S e CARS TICS Auction C Refreshments C Free Parking un Luedeman 25505 Chernick Taylor Michigan 481 e 313 295-0569 ground burning pieces fluttering down Just like WW II movie well now James reports Davids post-mor tem revealed fuel pipe frac tured thus causing flames just intended damage surpris ingly bad would expect will live fly again Bob Dolly Wischer S-221 Lapham Peak Rd Delafield WI 53018 RC Electrics/Kopski Continued page 47 no need get inside plane get battery wiring unless course want remove/replace battery Since never remove/change packs field connector perfectly suited needs necessary cool battery model small blower since always take several planes out theres no need immediately replace pack anyway As noted photo two jacks three solder terminals used unused can nipped off normally route two charge-jack wires directly motor battery instead through switch harness arrangement although nothing wrong latter Astro systems uses male connector charger cords compact equally convenient use has two connec tions two-conductor cable connector parts good hundreds matings chargings finally wear out easily replaced low cost way charger cords white 18 gauge lamp cord like visibility grass field especially dusk Electric fliers also use fre quently-supplied two-prong plastic Molex connectors system wir ing charging connection well Personally view Molex-type connector best suited connec tions infrequently accessed such connecting motor switch harness thence battery like use connectors frequent connections such charging has experience Molex connector components fit very tightly new get rather flim sy after numerous uses have experi enced mechanical change signifi cant electrical contact deterioration through use well newer goldplated versions Astro may better last regard mechanical con sideration still remains So stallations may use Molex connectors basic wiring Switchcraft parts always used charging connection however some systems supplied ordinarily require use Molex connectors charg ing Two examples Astro 15 25 systems battery made up two six-packs two seven-packs its own connector indi vidual battery packs connected wiring harness turn wires series form 12- 14-cell batteries run larger motors charging pack disconnected charged indepedent smaller packsomething thats relatively easy 12 volt source like auto battery charger such Astros 4005D Dual Charger course refueling means dis connecting two Molex sets connecting two battery connectors two charging connections disconnecting charging complete reconnecting batteries harness Friends thats whole lotta Molex mating course requires some disassembly some part plane its hatch flight fly lot Id go back rubber hand-launch So what I use simple charging system modification extends its capabilities presented May June columns system concept simple addition Switchcraft jack wired combined 12- 14-cell battery packs plane allows charging batteries simple external connection No disassem bly No wear tear harness connectors flying less fooling around funand thats what hobby about Now want offer easily-assembled accessory can used charge systems device simple deedbeing nothing cable assembly allows previously-present ed systems used charge plane time can see photograph output-splitter low-cost easyto-assemble interconnecting harness use assembled plastic 35mm film container simple plastic housing will Try pill bottle idea use ability charge systems handle large numbers cells though large number may con tained plane cable shown simply connects twoplanes worth batteries series charge system same charge cur rent flows both batteries course total number cells cannot exceed capability charge system As operational example suppose have two planes having six-cell pack other seven-cell pack Ordinarily youd have charge time have two separate charg ers However packs same capacity ie cells same ampere-hour rating can simply connect charge system output cable output splitter input two inputs latter device July 1985 135 Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used 25% Lighter Sandable Carveable Excellent Gap Filling Non-Sagging Superior Strength Sands Carves like Basswoodl l 6 tI oz Equal over 8 wt oz regular epoxys See dealer first write call WL PO Box 19784 St Paul MN 55119 715 425-1397 MODEL MAGIC PRODUCTS 0 Model Magic Filler 0 0 0 0 Comparison Chart Model Magic Product X Adhesion BalsaExcellent Foam Fiberglass Strength Flexing Spreading FuelResistance SandingAs med balsa HardnessAs hard balsa FinishingAny finish/covering Shelf Lifetill used up nntAcceptanceExcellent Water ResistExcellent 0 less methods data available request QSS t4 care enough fill very best very Poorinsist Model Magic Filler Circus Magic Filler Soft balsa Soft balsa 5-7 very Poor two planes would set up charge System operation though 13-cell packbecause effect you have upgraded version simple charge system last months column can charge least 16 cells total three ampsno matter total cell count distributed two planes As always sure both packs run down before commencing charging Some may confused method compared dual-charging capability popular Astro 4005D dual charger two approaches different can accomplish same results some installations Lets get deeper 4005D readily-available low cost way charge two individual battery packs half larger bat tery batteries two models However 4005D can charge two batteries time equal cell count covers cases same ampere-hour capacity way indi vidual packs charged parallel almost actually separated elec trically individual diodes resistors charger output leads Thus charg ing uneven six- seven-cell example mentioned previously no-no~ 4005D designed charge twin packs four seven cells capabilities up 12 Ah charge current available seven cells highly dependent condition 12 volt auto battery case requires 15 minutes time 12 Ah packs Certain other combinations will also require 15 minutes because necessity limit total power handled chargers internal control circuitry 4005D charger has very nice feature smoothly-controllable current setting Its meter measures total current must assume current being divided evenly two packs 4005D provides versatility flexibility lowest cost among products Im familiar withbut havent seen everything earlier description know charge systems presented last two columns operate rather differently fact incorporate chargers such 4005D part system Natural ly cost involved added features capability operating convenience may make such approach attractive fliers individual batteries being charged series via charge-splitter no question getting same current charge Also varied cell-count per pack can accommodated Finally sim ple external connection can handle multi-pack installations system does have limit though can output three amps 12 Ah cells will require least 20 minutes fill up smaller capacities can always get good charge 15 minutes use 4005D part sys tem use its output cords cord course may outfitted charge-splitter achieve two outputs Above please use variable-control feature instead click current control knob fully clockwise use charge system resistor banks establish current level Basic electricity have following column know began Basic Electricity mini-series March issue So far have seen some basic arithmetic relationships govern electrical quantities voltage current resistance power convenience listed again 1 V I 3 R 4P PR V voltage volts current amperes R resistance ohms P power watts first three quantities voltage current resistance quantities can measured sev eral multimeters pictured March issue Power obtained putting known values basic quantities L AFT 100 nIFFERENT OF KIND JILT TO LAST /C MODELS READY FOR SHIPMENT PLEASE SEND $200 FOR COMPLETE CURRENT LIST 136 Model Aviation $595 Sf1 ozi Fillets Filling Repair IUAIITERSCALL VAN ft SCALE PLANS & NOTES $ 2995 46 TIAL KIT & PLANS $12500 yE UILT UP TO ROUGH IT $50000 CALIF 93001 05 61 8500 $11500 PIPER TRI-PACER PA-22 PAN SCALE 5 G643-7616 DH-85LEOPARDMOTHE PAN s 1/4SCALE 5 642-8465 OH-SO PUSS MOTHE SPAN SCALE 5 AMERICAN JUNIOR - v24O4 Interceptor new AJ 404 foldi agsei eg interceptor isa refresher course flow Have Fun youve never flows youll thrill wings enfold soaring flight have flown heforeit will come hack Now can own GREATAMERICAN JUNIOR CLASSII/SYoull love It,and will everyone else 74 OOdr sirglr P0k 5393l.titif 43 Pak5498AlKtlrnsuum 484 Sujlder Kit5395AIRCRAFT CO 4t4Anr550vs no 484 nnrn 4 P04100 97t4800 runP4k LEARN TO FLY Beginners start Out right pro fessional comprehensive training foundimentals covered BasictTraint door & Out entire solo much BE INNERS PAC GE OFFER VIDEO PROGRAMS VHS& BETAS oai PROGRAM LISTINGSC 1BASIC CONSTRUCTION FOR BEGINNERS IN RIC107 Mm 4096 .J 2BASIC FUGNTTMAINING FOR BEGINNERS IN RIC65 Mm 4406 esaloasi foigfOIy detailed stspbyetep instruction Z a 3THE WORLD OF MODEL AVIATION90 Mm 4496eZ Expos Scale meets AMA Nets & 4OSHKOSH OVERVIEW56 Mm 3096 Workshops Foroims Tours AerobatIcs Warblrds & MoreAll 5AIRPLANE FIJNNIES Ifl 3006 Rentals MU See friends others goofing wildest video ever 6US SCALE MASTERS CHAMPIONSHIPS60 MIII 3096Si 495 best scale models pilots competIng top honors 7WARBIROS IN ACTIoN75 MIn 49 OBDERDIG INPOUNAflON Please Read CaeAaUv Avosi al Af sales final RENTAL DEPOSIT full purchase price EACH program ordered difference refunded RENTAL DURATION 1 week after delivery Reserved dates reguire 15 day notice PAYMENT Check 10 day clearance money order Sorry no Visa etc CODs available phone SHIPPING 5375Forelgn Canada add 10% TOTAL others add 15% IL res add 8% tea -SEND GUDERS TO ACAOEMY OF AVIATION RESEARCH & DEVELOPMENT OX 426139 AGO IL 60642 call pizi 4440S 10 am4 pm Man thru SaL fourth equation doing arithmetic serious Electric flier will eventually realize value such measurement ca pability will probably wind up owning least such instrument choices varied mini senes continues well see some features available used readers may familiar other terms RC experience such milliamperes Lets stop square away confusion may come about sort thing basic electrical terms given above several prefixes routinely used make life easier example milliampere 1/1000 ampere Its much easier say one-thousandth ampere prefixes may have heard have scale size commonly used prefixes applicable volts amps ohms micro means 1/1000000 of. milli means 1/1000 of. kilo means 1000 times. mega means 1000000 times. other prefixes like pico nano giga etc often show up hobby usage worked power company youd probably hear expressions like kilovolts megawatts mean thousands volts millions watts respectively Thus common power line voltage parts country 12 Ky 12000 volt line Part city may demand some number MW millions watts see what have sort jargon really abbreviated way talking writing Its easier may offer some initial confusion its much better long run use such expressions looked inside common receivers servos transmitters would find essentially resistors used ranged value few tens ohms about megohm Most would fall between few hundred ohms few hundred thousand ohms would find course could read color codes painted resistor bodies put Electric components ballpark batteries motors fall four 20 volts range motors suitable props draw five 25 amps majority fall six 16 volt 10 15 amp ranges Thus taking limit numbers end find motor input power levels fall between 20 watts very small 500 watts big common ly used ones fall range 60 watts 250 watts Right now everything have flying five planes falls latter range Fornow please forward questions comments SASE please author Happy Electric Landings Parts List parts numbers modifi cation Radio Shack Voltage Inverter described last months column advertantly omitted Refer photo lower riglst corner page 53 June 1985 issue terminal strip cut-down five-lug unit Radio Shack part No 274-688 two 50-volt three amp rectifier diodes Radio Shack part No 276-1141 note direction black-banded end 220 microfarad electrolytic capacitor Radio Shack part No 272-1017 negative lead goes terminal strip Electric event SAM 76s annual Old-Timer meet scheduled July 14 1985 will have added Electric event first time Its no-rules well almost thing wherein requirement model legal Antique Old-Timer design Any electric power system permissible further de tails contact Contest Director Ralph Riddle 2156 Street Rd Warrington PA 18976 Bob Kopski 25 West End Dr Lansdale PA 19446 RC Giht Scale/Beckman Continued page 49 its usually too small Giant Scale models case able build upper panels time complete lower wing just barely fit Sparrowhawk small airplane A-scale lower span less six feet put lower wing jig up side down because has degree negative dihedral As mentioned above wings struts flying wires have removable functional addition struts wires need adjustable struts made aluminum tubing will have spruce strips added bring scale size struts attached machine screws eyebolts wings eyebolts threaded aluminum blocks buried spars running eyebolts out effective length struts can adjusted flying wires made eighth-inch electricians fish tape piece spring steel wire 1-in wide about Y64-in thick available 50- Continued page 140 H ben Old Timer 7ka foam J4o4LL 4/ LMEZOS8 tea Mesa tOot BROOKLYN DODGER 56 Cabin'NEWEST Retail $52 95INTRODUCTORY PRICE $3900 t935 Record Breaker 96 $0956 ls39Zippertf$5356 1938 Kloud KIng 63 $0230 1901 Brigidier 56 $0070 toOl Super Quaker 79 $7276 1940 So Long S0$3036 t$36 Buccaneer 04 $0996 1930 Clipper MKI 72$4156 t937 Dallaire 100 $7516 1035 MIss America 89 $7190 1941 Playboy Sr 50 $5116 1991 Playboy Jr 54 $3116 1938 Powerhouse 54 $53 56 1990 Sailplane 78 $8476 1938 Trenton Terror 12 $4076 1940 Ranger 46$3196 1939 Korda Wake 44 $1916 lO3OAiercury 72 6 kits qualify SAM events FF & R/C feature highest quality machine cut & sanded parts Superior atl Competition sheet strip wood wire & window material Plane orig FE models easily convertible Sch R/C KlTS Sailpianes Electric power Gas Hobby Horn SENSOAR Glidgr 78 5s $1800 Midway Model GNOME R/C Hand Launch Glider$2000 Jolly Models FLINCER R/C HLG 55 Span $2900 Midway Model FAST EDDIE Aerobatic /55 Elec$1900 Jolly Models ELECTRICUS Electric Clider 05a$3250 Leisure PLAYBOY SR 97 Gear 00 Elect $3000 stro ASTRO SPORT 37 Direct 05 Elect$2250 Leisure WASP 37 Direct 05 Electrics $2250 Midway ULTRA MK IV 06 Geared EP $3900 Midway FLYING QUAKER 80 00-454 stroke $6479 4kslMidway DENNY JR 72 Alum Cowel $6396 ptwiTizrNrUFrEErTR1csySTEMWtPIrts Avail SKIPPING & HANDLING 64 Page CATALOGUE Up $800 add $150$200 PP/tat Class $801 $2000 add $225A copy wilt lie sent $2001 $4500 add $300 freewhen requested$4501 $7000 add $350to over $7000 add $400HOBBY HORN CA Addressees add 6% tea15173 Moran St IA Send MO VisaIMCIFEapIPO Box 2212 Check tallow up tO 30Westminster Ca 92600 days CK clearance 1714 8938311 COD Exact Charges plus $150 Hdl iCash OnlylfAft Hrs 1714 89513031 July1985 ii
Edition: Model Aviation - 1985/07
Page Numbers: 46, 47, 135, 136, 137
Radio Control Electrics Bob Kopski MANY modelers use trunk car back station wagon hangar maintenance depot theyre flying field Electric fliers have rather special need comes such usage want talk about month charging connections accessorIes car Theres quite bit interest shown readers March column Among other things column pictured discussed wiring installation made auto battery may recall wrote running heavy cabling directly battery rear station wagon cause thats fly out column photo showed connection scheme battery end may wondering about other end Astro sells 1 very useful Switchoraft connector sets jacks pin 4030 plugs 4029 Theyre $250 eachand well worth iti make charlnconnectlons very convenient Mount jack lower right plane leftover solder lug unused rightmost Plus 5 x oclock Negative Use No 20 22 wires battery pack flight-line charging battery can Improved couple replacement battery clamps autoparts store R Discard clamp-strap cable bolts replacing bolt longer jamnut long bolt good place clamp-on charger battery clip heres what did After considering lot possibilities finally decided use ordinary household outlets plugs 12 volt connec tions choice driven ready availability low cost familiar connectors chose three-prong 'grounded' variety eliminate possibility plugging two-prong ver sion backward Electrically used blade connections third ground connection As side note four previouslydescribed six No 12 conductors wired four positive screws two duplex outlets seen photo A-in ID soft copper pipe serves con duit also carries negative ground side battery front 46 Model Aviation Bob has charge receptacle box back station wagon uses two standard household dual sockets total four outputs BUT safetys sake mainly couldnt ever plug charger chord house wiring home workshop modified both plug recetacie grounding prong plug has enlarged short length /4-in 0 D bras tubing sweat-soldered place wont fit standard socket now pin has no electrical function Bobs system Hes drilled out car-receptacles %2-in dIameter using several intermediate-size drills Make sure shake out metal pies tic shards before using Take close look bore too touch-up needed 4-output charge-receptacle back Bob Kopskis station wegon Color-code paint redlpositive biackinegative Marc h 1985 column rear car Six local No 12 wires clamped pipe wheel well four go four negative screws pictured outlets six positive lines individually fused up near battery pipe connected negative battery post single massive auto-starter cable back main story concerns easy choice connec tors possibility accidentally plugging charger cordoutfitted ordinary three-prong household plug household wiring could see clearly pile stuff bench pick up charger input lead instead soldering iron wire plug HEATbut iron solution make scenario impossible done pictured soldered short piece A-in OD hobby shop brass tubing over unused ground prong male plug Remember active connection carefully drilled out mating connec tion sockets A2 course some grinding groaning metal contact fingers inside wanted clear hole allow now-oversized plug pin fit same pin able fit ordinary unmodified household outlet thus pro viding protection wanted As inadvertently plugging some inappropriate plug auto outlets much chance should have ap pliances car anyway besides did wrong deed theres generally minimal risk associated applying 12 volts DC ordinary 115 volt AC device plane Charger connections model battery yet another story photographs shows connector pair made Switchcraft Switchcraft parts introduced us Astro supplied charger connections Astro systems course parts available individually Astro through some electronics dis tributors well Over years have found plugs sockets very convenient reliable am using planes Im prejudicing possibility being something better Im looking Lets look first socket jack receptacle very easy install use mounts single round 5A-in holeeasily cut balsa fuselage side sharpened piece brass tubing Once installed its neat unobtrusive Best its always handy Continued page 135 CHARGE-SPLITTER SCHEMATIC DIAGRAM FROMI CHARGER ~A Ii OUTPUTr~B B __ B CHARGE JACK RE NUT TO PLANE #2 _ B CHARGE JACK SKETCH ILLUSTRATES HOW SOLDER LUGS OF SPLITTER JACKS ARE TIED TOGETHER YOU WANT THE 2 AIRBORNE PACKS CHARGED IN SERIES NOT IN PARALLEL charge splitter described text designed charge two planes once using charge systems described May June columns As shown device uses 3 SwItchcraft plugs jacks plastic 35mm film can some wire 51mph fled wiring schematic R presented show 2 output plugs wired seriesthe same current goes both planes TechmCa advice KAVAN DISTRIBUTED BY ~p LTD 4660 BOUL DECARIE BLVD MONTREAL QUE H3X 2H5 CANADA TEL 514 481-8107 CANADIAN DISTRIBUTORS OF 05 MAX FUTABA SUPER TIGRE PILOT GRAUPNER TOPP AYK R/C PLANES R/C BOATS DEALER INQUIRIES INVITED ALOUE1TE2 fixed pitch Special $19900 US ing LOCKHEED 286 L Rigid ective pitch Special $58900 US ping PRICES ARE GOOD ON ORDERS RECEIVED BY THE 1st OF THE MONTH OF THIS ISSUE ONLY July1985 47 svaiIabIe RANGER collective pitch Special $29800 US shipping * * HOURS MONDAY THRU FRIDAY9AM -5PM EASTERN TIME * * K~ - Hosted Indian City Radio Control Club Raffle Ready Fly GPM 540 CAP 21 Less Radio BY Great Planes Model Mfg Co Zenoah G 380 Engine World Engines K & B Super Poxy Finish BY K & B Manufacturing Inc DETROIT EXPO VII Greater Michigan Modelers Show Benjamin F Yack Recreation Center 3131 Third Street Wyandotte Michigan August 24 & 25 MANUFACTURERS STATIC DISPLAYS SWAP-SHOP CASH AWARDS OF SHOW FOR PLANES S e CARS TICS Auction C Refreshments C Free Parking un Luedeman 25505 Chernick Taylor Michigan 481 e 313 295-0569 ground burning pieces fluttering down Just like WW II movie well now James reports Davids post-mor tem revealed fuel pipe frac tured thus causing flames just intended damage surpris ingly bad would expect will live fly again Bob Dolly Wischer S-221 Lapham Peak Rd Delafield WI 53018 RC Electrics/Kopski Continued page 47 no need get inside plane get battery wiring unless course want remove/replace battery Since never remove/change packs field connector perfectly suited needs necessary cool battery model small blower since always take several planes out theres no need immediately replace pack anyway As noted photo two jacks three solder terminals used unused can nipped off normally route two charge-jack wires directly motor battery instead through switch harness arrangement although nothing wrong latter Astro systems uses male connector charger cords compact equally convenient use has two connec tions two-conductor cable connector parts good hundreds matings chargings finally wear out easily replaced low cost way charger cords white 18 gauge lamp cord like visibility grass field especially dusk Electric fliers also use fre quently-supplied two-prong plastic Molex connectors system wir ing charging connection well Personally view Molex-type connector best suited connec tions infrequently accessed such connecting motor switch harness thence battery like use connectors frequent connections such charging has experience Molex connector components fit very tightly new get rather flim sy after numerous uses have experi enced mechanical change signifi cant electrical contact deterioration through use well newer goldplated versions Astro may better last regard mechanical con sideration still remains So stallations may use Molex connectors basic wiring Switchcraft parts always used charging connection however some systems supplied ordinarily require use Molex connectors charg ing Two examples Astro 15 25 systems battery made up two six-packs two seven-packs its own connector indi vidual battery packs connected wiring harness turn wires series form 12- 14-cell batteries run larger motors charging pack disconnected charged indepedent smaller packsomething thats relatively easy 12 volt source like auto battery charger such Astros 4005D Dual Charger course refueling means dis connecting two Molex sets connecting two battery connectors two charging connections disconnecting charging complete reconnecting batteries harness Friends thats whole lotta Molex mating course requires some disassembly some part plane its hatch flight fly lot Id go back rubber hand-launch So what I use simple charging system modification extends its capabilities presented May June columns system concept simple addition Switchcraft jack wired combined 12- 14-cell battery packs plane allows charging batteries simple external connection No disassem bly No wear tear harness connectors flying less fooling around funand thats what hobby about Now want offer easily-assembled accessory can used charge systems device simple deedbeing nothing cable assembly allows previously-present ed systems used charge plane time can see photograph output-splitter low-cost easyto-assemble interconnecting harness use assembled plastic 35mm film container simple plastic housing will Try pill bottle idea use ability charge systems handle large numbers cells though large number may con tained plane cable shown simply connects twoplanes worth batteries series charge system same charge cur rent flows both batteries course total number cells cannot exceed capability charge system As operational example suppose have two planes having six-cell pack other seven-cell pack Ordinarily youd have charge time have two separate charg ers However packs same capacity ie cells same ampere-hour rating can simply connect charge system output cable output splitter input two inputs latter device July 1985 135 Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used 25% Lighter Sandable Carveable Excellent Gap Filling Non-Sagging Superior Strength Sands Carves like Basswoodl l 6 tI oz Equal over 8 wt oz regular epoxys See dealer first write call WL PO Box 19784 St Paul MN 55119 715 425-1397 MODEL MAGIC PRODUCTS 0 Model Magic Filler 0 0 0 0 Comparison Chart Model Magic Product X Adhesion BalsaExcellent Foam Fiberglass Strength Flexing Spreading FuelResistance SandingAs med balsa HardnessAs hard balsa FinishingAny finish/covering Shelf Lifetill used up nntAcceptanceExcellent Water ResistExcellent 0 less methods data available request QSS t4 care enough fill very best very Poorinsist Model Magic Filler Circus Magic Filler Soft balsa Soft balsa 5-7 very Poor two planes would set up charge System operation though 13-cell packbecause effect you have upgraded version simple charge system last months column can charge least 16 cells total three ampsno matter total cell count distributed two planes As always sure both packs run down before commencing charging Some may confused method compared dual-charging capability popular Astro 4005D dual charger two approaches different can accomplish same results some installations Lets get deeper 4005D readily-available low cost way charge two individual battery packs half larger bat tery batteries two models However 4005D can charge two batteries time equal cell count covers cases same ampere-hour capacity way indi vidual packs charged parallel almost actually separated elec trically individual diodes resistors charger output leads Thus charg ing uneven six- seven-cell example mentioned previously no-no~ 4005D designed charge twin packs four seven cells capabilities up 12 Ah charge current available seven cells highly dependent condition 12 volt auto battery case requires 15 minutes time 12 Ah packs Certain other combinations will also require 15 minutes because necessity limit total power handled chargers internal control circuitry 4005D charger has very nice feature smoothly-controllable current setting Its meter measures total current must assume current being divided evenly two packs 4005D provides versatility flexibility lowest cost among products Im familiar withbut havent seen everything earlier description know charge systems presented last two columns operate rather differently fact incorporate chargers such 4005D part system Natural ly cost involved added features capability operating convenience may make such approach attractive fliers individual batteries being charged series via charge-splitter no question getting same current charge Also varied cell-count per pack can accommodated Finally sim ple external connection can handle multi-pack installations system does have limit though can output three amps 12 Ah cells will require least 20 minutes fill up smaller capacities can always get good charge 15 minutes use 4005D part sys tem use its output cords cord course may outfitted charge-splitter achieve two outputs Above please use variable-control feature instead click current control knob fully clockwise use charge system resistor banks establish current level Basic electricity have following column know began Basic Electricity mini-series March issue So far have seen some basic arithmetic relationships govern electrical quantities voltage current resistance power convenience listed again 1 V I 3 R 4P PR V voltage volts current amperes R resistance ohms P power watts first three quantities voltage current resistance quantities can measured sev eral multimeters pictured March issue Power obtained putting known values basic quantities L AFT 100 nIFFERENT OF KIND JILT TO LAST /C MODELS READY FOR SHIPMENT PLEASE SEND $200 FOR COMPLETE CURRENT LIST 136 Model Aviation $595 Sf1 ozi Fillets Filling Repair IUAIITERSCALL VAN ft SCALE PLANS & NOTES $ 2995 46 TIAL KIT & PLANS $12500 yE UILT UP TO ROUGH IT $50000 CALIF 93001 05 61 8500 $11500 PIPER TRI-PACER PA-22 PAN SCALE 5 G643-7616 DH-85LEOPARDMOTHE PAN s 1/4SCALE 5 642-8465 OH-SO PUSS MOTHE SPAN SCALE 5 AMERICAN JUNIOR - v24O4 Interceptor new AJ 404 foldi agsei eg interceptor isa refresher course flow Have Fun youve never flows youll thrill wings enfold soaring flight have flown heforeit will come hack Now can own GREATAMERICAN JUNIOR CLASSII/SYoull love It,and will everyone else 74 OOdr sirglr P0k 5393l.titif 43 Pak5498AlKtlrnsuum 484 Sujlder Kit5395AIRCRAFT CO 4t4Anr550vs no 484 nnrn 4 P04100 97t4800 runP4k LEARN TO FLY Beginners start Out right pro fessional comprehensive training foundimentals covered BasictTraint door & Out entire solo much BE INNERS PAC GE OFFER VIDEO PROGRAMS VHS& BETAS oai PROGRAM LISTINGSC 1BASIC CONSTRUCTION FOR BEGINNERS IN RIC107 Mm 4096 .J 2BASIC FUGNTTMAINING FOR BEGINNERS IN RIC65 Mm 4406 esaloasi foigfOIy detailed stspbyetep instruction Z a 3THE WORLD OF MODEL AVIATION90 Mm 4496eZ Expos Scale meets AMA Nets & 4OSHKOSH OVERVIEW56 Mm 3096 Workshops Foroims Tours AerobatIcs Warblrds & MoreAll 5AIRPLANE FIJNNIES Ifl 3006 Rentals MU See friends others goofing wildest video ever 6US SCALE MASTERS CHAMPIONSHIPS60 MIII 3096Si 495 best scale models pilots competIng top honors 7WARBIROS IN ACTIoN75 MIn 49 OBDERDIG INPOUNAflON Please Read CaeAaUv Avosi al Af sales final RENTAL DEPOSIT full purchase price EACH program ordered difference refunded RENTAL DURATION 1 week after delivery Reserved dates reguire 15 day notice PAYMENT Check 10 day clearance money order Sorry no Visa etc CODs available phone SHIPPING 5375Forelgn Canada add 10% TOTAL others add 15% IL res add 8% tea -SEND GUDERS TO ACAOEMY OF AVIATION RESEARCH & DEVELOPMENT OX 426139 AGO IL 60642 call pizi 4440S 10 am4 pm Man thru SaL fourth equation doing arithmetic serious Electric flier will eventually realize value such measurement ca pability will probably wind up owning least such instrument choices varied mini senes continues well see some features available used readers may familiar other terms RC experience such milliamperes Lets stop square away confusion may come about sort thing basic electrical terms given above several prefixes routinely used make life easier example milliampere 1/1000 ampere Its much easier say one-thousandth ampere prefixes may have heard have scale size commonly used prefixes applicable volts amps ohms micro means 1/1000000 of. milli means 1/1000 of. kilo means 1000 times. mega means 1000000 times. other prefixes like pico nano giga etc often show up hobby usage worked power company youd probably hear expressions like kilovolts megawatts mean thousands volts millions watts respectively Thus common power line voltage parts country 12 Ky 12000 volt line Part city may demand some number MW millions watts see what have sort jargon really abbreviated way talking writing Its easier may offer some initial confusion its much better long run use such expressions looked inside common receivers servos transmitters would find essentially resistors used ranged value few tens ohms about megohm Most would fall between few hundred ohms few hundred thousand ohms would find course could read color codes painted resistor bodies put Electric components ballpark batteries motors fall four 20 volts range motors suitable props draw five 25 amps majority fall six 16 volt 10 15 amp ranges Thus taking limit numbers end find motor input power levels fall between 20 watts very small 500 watts big common ly used ones fall range 60 watts 250 watts Right now everything have flying five planes falls latter range Fornow please forward questions comments SASE please author Happy Electric Landings Parts List parts numbers modifi cation Radio Shack Voltage Inverter described last months column advertantly omitted Refer photo lower riglst corner page 53 June 1985 issue terminal strip cut-down five-lug unit Radio Shack part No 274-688 two 50-volt three amp rectifier diodes Radio Shack part No 276-1141 note direction black-banded end 220 microfarad electrolytic capacitor Radio Shack part No 272-1017 negative lead goes terminal strip Electric event SAM 76s annual Old-Timer meet scheduled July 14 1985 will have added Electric event first time Its no-rules well almost thing wherein requirement model legal Antique Old-Timer design Any electric power system permissible further de tails contact Contest Director Ralph Riddle 2156 Street Rd Warrington PA 18976 Bob Kopski 25 West End Dr Lansdale PA 19446 RC Giht Scale/Beckman Continued page 49 its usually too small Giant Scale models case able build upper panels time complete lower wing just barely fit Sparrowhawk small airplane A-scale lower span less six feet put lower wing jig up side down because has degree negative dihedral As mentioned above wings struts flying wires have removable functional addition struts wires need adjustable struts made aluminum tubing will have spruce strips added bring scale size struts attached machine screws eyebolts wings eyebolts threaded aluminum blocks buried spars running eyebolts out effective length struts can adjusted flying wires made eighth-inch electricians fish tape piece spring steel wire 1-in wide about Y64-in thick available 50- Continued page 140 H ben Old Timer 7ka foam J4o4LL 4/ LMEZOS8 tea Mesa tOot BROOKLYN DODGER 56 Cabin'NEWEST Retail $52 95INTRODUCTORY PRICE $3900 t935 Record Breaker 96 $0956 ls39Zippertf$5356 1938 Kloud KIng 63 $0230 1901 Brigidier 56 $0070 toOl Super Quaker 79 $7276 1940 So Long S0$3036 t$36 Buccaneer 04 $0996 1930 Clipper MKI 72$4156 t937 Dallaire 100 $7516 1035 MIss America 89 $7190 1941 Playboy Sr 50 $5116 1991 Playboy Jr 54 $3116 1938 Powerhouse 54 $53 56 1990 Sailplane 78 $8476 1938 Trenton Terror 12 $4076 1940 Ranger 46$3196 1939 Korda Wake 44 $1916 lO3OAiercury 72 6 kits qualify SAM events FF & R/C feature highest quality machine cut & sanded parts Superior atl Competition sheet strip wood wire & window material Plane orig FE models easily convertible Sch R/C KlTS Sailpianes Electric power Gas Hobby Horn SENSOAR Glidgr 78 5s $1800 Midway Model GNOME R/C Hand Launch Glider$2000 Jolly Models FLINCER R/C HLG 55 Span $2900 Midway Model FAST EDDIE Aerobatic /55 Elec$1900 Jolly Models ELECTRICUS Electric Clider 05a$3250 Leisure PLAYBOY SR 97 Gear 00 Elect $3000 stro ASTRO SPORT 37 Direct 05 Elect$2250 Leisure WASP 37 Direct 05 Electrics $2250 Midway ULTRA MK IV 06 Geared EP $3900 Midway FLYING QUAKER 80 00-454 stroke $6479 4kslMidway DENNY JR 72 Alum Cowel $6396 ptwiTizrNrUFrEErTR1csySTEMWtPIrts Avail SKIPPING & HANDLING 64 Page CATALOGUE Up $800 add $150$200 PP/tat Class $801 $2000 add $225A copy wilt lie sent $2001 $4500 add $300 freewhen requested$4501 $7000 add $350to over $7000 add $400HOBBY HORN CA Addressees add 6% tea15173 Moran St IA Send MO VisaIMCIFEapIPO Box 2212 Check tallow up tO 30Westminster Ca 92600 days CK clearance 1714 8938311 COD Exact Charges plus $150 Hdl iCash OnlylfAft Hrs 1714 89513031 July1985 ii
Edition: Model Aviation - 1985/07
Page Numbers: 46, 47, 135, 136, 137
Radio Control Electrics Bob Kopski MANY modelers use trunk car back station wagon hangar maintenance depot theyre flying field Electric fliers have rather special need comes such usage want talk about month charging connections accessorIes car Theres quite bit interest shown readers March column Among other things column pictured discussed wiring installation made auto battery may recall wrote running heavy cabling directly battery rear station wagon cause thats fly out column photo showed connection scheme battery end may wondering about other end Astro sells 1 very useful Switchoraft connector sets jacks pin 4030 plugs 4029 Theyre $250 eachand well worth iti make charlnconnectlons very convenient Mount jack lower right plane leftover solder lug unused rightmost Plus 5 x oclock Negative Use No 20 22 wires battery pack flight-line charging battery can Improved couple replacement battery clamps autoparts store R Discard clamp-strap cable bolts replacing bolt longer jamnut long bolt good place clamp-on charger battery clip heres what did After considering lot possibilities finally decided use ordinary household outlets plugs 12 volt connec tions choice driven ready availability low cost familiar connectors chose three-prong 'grounded' variety eliminate possibility plugging two-prong ver sion backward Electrically used blade connections third ground connection As side note four previouslydescribed six No 12 conductors wired four positive screws two duplex outlets seen photo A-in ID soft copper pipe serves con duit also carries negative ground side battery front 46 Model Aviation Bob has charge receptacle box back station wagon uses two standard household dual sockets total four outputs BUT safetys sake mainly couldnt ever plug charger chord house wiring home workshop modified both plug recetacie grounding prong plug has enlarged short length /4-in 0 D bras tubing sweat-soldered place wont fit standard socket now pin has no electrical function Bobs system Hes drilled out car-receptacles %2-in dIameter using several intermediate-size drills Make sure shake out metal pies tic shards before using Take close look bore too touch-up needed 4-output charge-receptacle back Bob Kopskis station wegon Color-code paint redlpositive biackinegative Marc h 1985 column rear car Six local No 12 wires clamped pipe wheel well four go four negative screws pictured outlets six positive lines individually fused up near battery pipe connected negative battery post single massive auto-starter cable back main story concerns easy choice connec tors possibility accidentally plugging charger cordoutfitted ordinary three-prong household plug household wiring could see clearly pile stuff bench pick up charger input lead instead soldering iron wire plug HEATbut iron solution make scenario impossible done pictured soldered short piece A-in OD hobby shop brass tubing over unused ground prong male plug Remember active connection carefully drilled out mating connec tion sockets A2 course some grinding groaning metal contact fingers inside wanted clear hole allow now-oversized plug pin fit same pin able fit ordinary unmodified household outlet thus pro viding protection wanted As inadvertently plugging some inappropriate plug auto outlets much chance should have ap pliances car anyway besides did wrong deed theres generally minimal risk associated applying 12 volts DC ordinary 115 volt AC device plane Charger connections model battery yet another story photographs shows connector pair made Switchcraft Switchcraft parts introduced us Astro supplied charger connections Astro systems course parts available individually Astro through some electronics dis tributors well Over years have found plugs sockets very convenient reliable am using planes Im prejudicing possibility being something better Im looking Lets look first socket jack receptacle very easy install use mounts single round 5A-in holeeasily cut balsa fuselage side sharpened piece brass tubing Once installed its neat unobtrusive Best its always handy Continued page 135 CHARGE-SPLITTER SCHEMATIC DIAGRAM FROMI CHARGER ~A Ii OUTPUTr~B B __ B CHARGE JACK RE NUT TO PLANE #2 _ B CHARGE JACK SKETCH ILLUSTRATES HOW SOLDER LUGS OF SPLITTER JACKS ARE TIED TOGETHER YOU WANT THE 2 AIRBORNE PACKS CHARGED IN SERIES NOT IN PARALLEL charge splitter described text designed charge two planes once using charge systems described May June columns As shown device uses 3 SwItchcraft plugs jacks plastic 35mm film can some wire 51mph fled wiring schematic R presented show 2 output plugs wired seriesthe same current goes both planes TechmCa advice KAVAN DISTRIBUTED BY ~p LTD 4660 BOUL DECARIE BLVD MONTREAL QUE H3X 2H5 CANADA TEL 514 481-8107 CANADIAN DISTRIBUTORS OF 05 MAX FUTABA SUPER TIGRE PILOT GRAUPNER TOPP AYK R/C PLANES R/C BOATS DEALER INQUIRIES INVITED ALOUE1TE2 fixed pitch Special $19900 US ing LOCKHEED 286 L Rigid ective pitch Special $58900 US ping PRICES ARE GOOD ON ORDERS RECEIVED BY THE 1st OF THE MONTH OF THIS ISSUE ONLY July1985 47 svaiIabIe RANGER collective pitch Special $29800 US shipping * * HOURS MONDAY THRU FRIDAY9AM -5PM EASTERN TIME * * K~ - Hosted Indian City Radio Control Club Raffle Ready Fly GPM 540 CAP 21 Less Radio BY Great Planes Model Mfg Co Zenoah G 380 Engine World Engines K & B Super Poxy Finish BY K & B Manufacturing Inc DETROIT EXPO VII Greater Michigan Modelers Show Benjamin F Yack Recreation Center 3131 Third Street Wyandotte Michigan August 24 & 25 MANUFACTURERS STATIC DISPLAYS SWAP-SHOP CASH AWARDS OF SHOW FOR PLANES S e CARS TICS Auction C Refreshments C Free Parking un Luedeman 25505 Chernick Taylor Michigan 481 e 313 295-0569 ground burning pieces fluttering down Just like WW II movie well now James reports Davids post-mor tem revealed fuel pipe frac tured thus causing flames just intended damage surpris ingly bad would expect will live fly again Bob Dolly Wischer S-221 Lapham Peak Rd Delafield WI 53018 RC Electrics/Kopski Continued page 47 no need get inside plane get battery wiring unless course want remove/replace battery Since never remove/change packs field connector perfectly suited needs necessary cool battery model small blower since always take several planes out theres no need immediately replace pack anyway As noted photo two jacks three solder terminals used unused can nipped off normally route two charge-jack wires directly motor battery instead through switch harness arrangement although nothing wrong latter Astro systems uses male connector charger cords compact equally convenient use has two connec tions two-conductor cable connector parts good hundreds matings chargings finally wear out easily replaced low cost way charger cords white 18 gauge lamp cord like visibility grass field especially dusk Electric fliers also use fre quently-supplied two-prong plastic Molex connectors system wir ing charging connection well Personally view Molex-type connector best suited connec tions infrequently accessed such connecting motor switch harness thence battery like use connectors frequent connections such charging has experience Molex connector components fit very tightly new get rather flim sy after numerous uses have experi enced mechanical change signifi cant electrical contact deterioration through use well newer goldplated versions Astro may better last regard mechanical con sideration still remains So stallations may use Molex connectors basic wiring Switchcraft parts always used charging connection however some systems supplied ordinarily require use Molex connectors charg ing Two examples Astro 15 25 systems battery made up two six-packs two seven-packs its own connector indi vidual battery packs connected wiring harness turn wires series form 12- 14-cell batteries run larger motors charging pack disconnected charged indepedent smaller packsomething thats relatively easy 12 volt source like auto battery charger such Astros 4005D Dual Charger course refueling means dis connecting two Molex sets connecting two battery connectors two charging connections disconnecting charging complete reconnecting batteries harness Friends thats whole lotta Molex mating course requires some disassembly some part plane its hatch flight fly lot Id go back rubber hand-launch So what I use simple charging system modification extends its capabilities presented May June columns system concept simple addition Switchcraft jack wired combined 12- 14-cell battery packs plane allows charging batteries simple external connection No disassem bly No wear tear harness connectors flying less fooling around funand thats what hobby about Now want offer easily-assembled accessory can used charge systems device simple deedbeing nothing cable assembly allows previously-present ed systems used charge plane time can see photograph output-splitter low-cost easyto-assemble interconnecting harness use assembled plastic 35mm film container simple plastic housing will Try pill bottle idea use ability charge systems handle large numbers cells though large number may con tained plane cable shown simply connects twoplanes worth batteries series charge system same charge cur rent flows both batteries course total number cells cannot exceed capability charge system As operational example suppose have two planes having six-cell pack other seven-cell pack Ordinarily youd have charge time have two separate charg ers However packs same capacity ie cells same ampere-hour rating can simply connect charge system output cable output splitter input two inputs latter device July 1985 135 Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used 25% Lighter Sandable Carveable Excellent Gap Filling Non-Sagging Superior Strength Sands Carves like Basswoodl l 6 tI oz Equal over 8 wt oz regular epoxys See dealer first write call WL PO Box 19784 St Paul MN 55119 715 425-1397 MODEL MAGIC PRODUCTS 0 Model Magic Filler 0 0 0 0 Comparison Chart Model Magic Product X Adhesion BalsaExcellent Foam Fiberglass Strength Flexing Spreading FuelResistance SandingAs med balsa HardnessAs hard balsa FinishingAny finish/covering Shelf Lifetill used up nntAcceptanceExcellent Water ResistExcellent 0 less methods data available request QSS t4 care enough fill very best very Poorinsist Model Magic Filler Circus Magic Filler Soft balsa Soft balsa 5-7 very Poor two planes would set up charge System operation though 13-cell packbecause effect you have upgraded version simple charge system last months column can charge least 16 cells total three ampsno matter total cell count distributed two planes As always sure both packs run down before commencing charging Some may confused method compared dual-charging capability popular Astro 4005D dual charger two approaches different can accomplish same results some installations Lets get deeper 4005D readily-available low cost way charge two individual battery packs half larger bat tery batteries two models However 4005D can charge two batteries time equal cell count covers cases same ampere-hour capacity way indi vidual packs charged parallel almost actually separated elec trically individual diodes resistors charger output leads Thus charg ing uneven six- seven-cell example mentioned previously no-no~ 4005D designed charge twin packs four seven cells capabilities up 12 Ah charge current available seven cells highly dependent condition 12 volt auto battery case requires 15 minutes time 12 Ah packs Certain other combinations will also require 15 minutes because necessity limit total power handled chargers internal control circuitry 4005D charger has very nice feature smoothly-controllable current setting Its meter measures total current must assume current being divided evenly two packs 4005D provides versatility flexibility lowest cost among products Im familiar withbut havent seen everything earlier description know charge systems presented last two columns operate rather differently fact incorporate chargers such 4005D part system Natural ly cost involved added features capability operating convenience may make such approach attractive fliers individual batteries being charged series via charge-splitter no question getting same current charge Also varied cell-count per pack can accommodated Finally sim ple external connection can handle multi-pack installations system does have limit though can output three amps 12 Ah cells will require least 20 minutes fill up smaller capacities can always get good charge 15 minutes use 4005D part sys tem use its output cords cord course may outfitted charge-splitter achieve two outputs Above please use variable-control feature instead click current control knob fully clockwise use charge system resistor banks establish current level Basic electricity have following column know began Basic Electricity mini-series March issue So far have seen some basic arithmetic relationships govern electrical quantities voltage current resistance power convenience listed again 1 V I 3 R 4P PR V voltage volts current amperes R resistance ohms P power watts first three quantities voltage current resistance quantities can measured sev eral multimeters pictured March issue Power obtained putting known values basic quantities L AFT 100 nIFFERENT OF KIND JILT TO LAST /C MODELS READY FOR SHIPMENT PLEASE SEND $200 FOR COMPLETE CURRENT LIST 136 Model Aviation $595 Sf1 ozi Fillets Filling Repair IUAIITERSCALL VAN ft SCALE PLANS & NOTES $ 2995 46 TIAL KIT & PLANS $12500 yE UILT UP TO ROUGH IT $50000 CALIF 93001 05 61 8500 $11500 PIPER TRI-PACER PA-22 PAN SCALE 5 G643-7616 DH-85LEOPARDMOTHE PAN s 1/4SCALE 5 642-8465 OH-SO PUSS MOTHE SPAN SCALE 5 AMERICAN JUNIOR - v24O4 Interceptor new AJ 404 foldi agsei eg interceptor isa refresher course flow Have Fun youve never flows youll thrill wings enfold soaring flight have flown heforeit will come hack Now can own GREATAMERICAN JUNIOR CLASSII/SYoull love It,and will everyone else 74 OOdr sirglr P0k 5393l.titif 43 Pak5498AlKtlrnsuum 484 Sujlder Kit5395AIRCRAFT CO 4t4Anr550vs no 484 nnrn 4 P04100 97t4800 runP4k LEARN TO FLY Beginners start Out right pro fessional comprehensive training foundimentals covered BasictTraint door & Out entire solo much BE INNERS PAC GE OFFER VIDEO PROGRAMS VHS& BETAS oai PROGRAM LISTINGSC 1BASIC CONSTRUCTION FOR BEGINNERS IN RIC107 Mm 4096 .J 2BASIC FUGNTTMAINING FOR BEGINNERS IN RIC65 Mm 4406 esaloasi foigfOIy detailed stspbyetep instruction Z a 3THE WORLD OF MODEL AVIATION90 Mm 4496eZ Expos Scale meets AMA Nets & 4OSHKOSH OVERVIEW56 Mm 3096 Workshops Foroims Tours AerobatIcs Warblrds & MoreAll 5AIRPLANE FIJNNIES Ifl 3006 Rentals MU See friends others goofing wildest video ever 6US SCALE MASTERS CHAMPIONSHIPS60 MIII 3096Si 495 best scale models pilots competIng top honors 7WARBIROS IN ACTIoN75 MIn 49 OBDERDIG INPOUNAflON Please Read CaeAaUv Avosi al Af sales final RENTAL DEPOSIT full purchase price EACH program ordered difference refunded RENTAL DURATION 1 week after delivery Reserved dates reguire 15 day notice PAYMENT Check 10 day clearance money order Sorry no Visa etc CODs available phone SHIPPING 5375Forelgn Canada add 10% TOTAL others add 15% IL res add 8% tea -SEND GUDERS TO ACAOEMY OF AVIATION RESEARCH & DEVELOPMENT OX 426139 AGO IL 60642 call pizi 4440S 10 am4 pm Man thru SaL fourth equation doing arithmetic serious Electric flier will eventually realize value such measurement ca pability will probably wind up owning least such instrument choices varied mini senes continues well see some features available used readers may familiar other terms RC experience such milliamperes Lets stop square away confusion may come about sort thing basic electrical terms given above several prefixes routinely used make life easier example milliampere 1/1000 ampere Its much easier say one-thousandth ampere prefixes may have heard have scale size commonly used prefixes applicable volts amps ohms micro means 1/1000000 of. milli means 1/1000 of. kilo means 1000 times. mega means 1000000 times. other prefixes like pico nano giga etc often show up hobby usage worked power company youd probably hear expressions like kilovolts megawatts mean thousands volts millions watts respectively Thus common power line voltage parts country 12 Ky 12000 volt line Part city may demand some number MW millions watts see what have sort jargon really abbreviated way talking writing Its easier may offer some initial confusion its much better long run use such expressions looked inside common receivers servos transmitters would find essentially resistors used ranged value few tens ohms about megohm Most would fall between few hundred ohms few hundred thousand ohms would find course could read color codes painted resistor bodies put Electric components ballpark batteries motors fall four 20 volts range motors suitable props draw five 25 amps majority fall six 16 volt 10 15 amp ranges Thus taking limit numbers end find motor input power levels fall between 20 watts very small 500 watts big common ly used ones fall range 60 watts 250 watts Right now everything have flying five planes falls latter range Fornow please forward questions comments SASE please author Happy Electric Landings Parts List parts numbers modifi cation Radio Shack Voltage Inverter described last months column advertantly omitted Refer photo lower riglst corner page 53 June 1985 issue terminal strip cut-down five-lug unit Radio Shack part No 274-688 two 50-volt three amp rectifier diodes Radio Shack part No 276-1141 note direction black-banded end 220 microfarad electrolytic capacitor Radio Shack part No 272-1017 negative lead goes terminal strip Electric event SAM 76s annual Old-Timer meet scheduled July 14 1985 will have added Electric event first time Its no-rules well almost thing wherein requirement model legal Antique Old-Timer design Any electric power system permissible further de tails contact Contest Director Ralph Riddle 2156 Street Rd Warrington PA 18976 Bob Kopski 25 West End Dr Lansdale PA 19446 RC Giht Scale/Beckman Continued page 49 its usually too small Giant Scale models case able build upper panels time complete lower wing just barely fit Sparrowhawk small airplane A-scale lower span less six feet put lower wing jig up side down because has degree negative dihedral As mentioned above wings struts flying wires have removable functional addition struts wires need adjustable struts made aluminum tubing will have spruce strips added bring scale size struts attached machine screws eyebolts wings eyebolts threaded aluminum blocks buried spars running eyebolts out effective length struts can adjusted flying wires made eighth-inch electricians fish tape piece spring steel wire 1-in wide about Y64-in thick available 50- Continued page 140 H ben Old Timer 7ka foam J4o4LL 4/ LMEZOS8 tea Mesa tOot BROOKLYN DODGER 56 Cabin'NEWEST Retail $52 95INTRODUCTORY PRICE $3900 t935 Record Breaker 96 $0956 ls39Zippertf$5356 1938 Kloud KIng 63 $0230 1901 Brigidier 56 $0070 toOl Super Quaker 79 $7276 1940 So Long S0$3036 t$36 Buccaneer 04 $0996 1930 Clipper MKI 72$4156 t937 Dallaire 100 $7516 1035 MIss America 89 $7190 1941 Playboy Sr 50 $5116 1991 Playboy Jr 54 $3116 1938 Powerhouse 54 $53 56 1990 Sailplane 78 $8476 1938 Trenton Terror 12 $4076 1940 Ranger 46$3196 1939 Korda Wake 44 $1916 lO3OAiercury 72 6 kits qualify SAM events FF & R/C feature highest quality machine cut & sanded parts Superior atl Competition sheet strip wood wire & window material Plane orig FE models easily convertible Sch R/C KlTS Sailpianes Electric power Gas Hobby Horn SENSOAR Glidgr 78 5s $1800 Midway Model GNOME R/C Hand Launch Glider$2000 Jolly Models FLINCER R/C HLG 55 Span $2900 Midway Model FAST EDDIE Aerobatic /55 Elec$1900 Jolly Models ELECTRICUS Electric Clider 05a$3250 Leisure PLAYBOY SR 97 Gear 00 Elect $3000 stro ASTRO SPORT 37 Direct 05 Elect$2250 Leisure WASP 37 Direct 05 Electrics $2250 Midway ULTRA MK IV 06 Geared EP $3900 Midway FLYING QUAKER 80 00-454 stroke $6479 4kslMidway DENNY JR 72 Alum Cowel $6396 ptwiTizrNrUFrEErTR1csySTEMWtPIrts Avail SKIPPING & HANDLING 64 Page CATALOGUE Up $800 add $150$200 PP/tat Class $801 $2000 add $225A copy wilt lie sent $2001 $4500 add $300 freewhen requested$4501 $7000 add $350to over $7000 add $400HOBBY HORN CA Addressees add 6% tea15173 Moran St IA Send MO VisaIMCIFEapIPO Box 2212 Check tallow up tO 30Westminster Ca 92600 days CK clearance 1714 8938311 COD Exact Charges plus $150 Hdl iCash OnlylfAft Hrs 1714 89513031 July1985 ii
Edition: Model Aviation - 1985/07
Page Numbers: 46, 47, 135, 136, 137
Radio Control Electrics Bob Kopski MANY modelers use trunk car back station wagon hangar maintenance depot theyre flying field Electric fliers have rather special need comes such usage want talk about month charging connections accessorIes car Theres quite bit interest shown readers March column Among other things column pictured discussed wiring installation made auto battery may recall wrote running heavy cabling directly battery rear station wagon cause thats fly out column photo showed connection scheme battery end may wondering about other end Astro sells 1 very useful Switchoraft connector sets jacks pin 4030 plugs 4029 Theyre $250 eachand well worth iti make charlnconnectlons very convenient Mount jack lower right plane leftover solder lug unused rightmost Plus 5 x oclock Negative Use No 20 22 wires battery pack flight-line charging battery can Improved couple replacement battery clamps autoparts store R Discard clamp-strap cable bolts replacing bolt longer jamnut long bolt good place clamp-on charger battery clip heres what did After considering lot possibilities finally decided use ordinary household outlets plugs 12 volt connec tions choice driven ready availability low cost familiar connectors chose three-prong 'grounded' variety eliminate possibility plugging two-prong ver sion backward Electrically used blade connections third ground connection As side note four previouslydescribed six No 12 conductors wired four positive screws two duplex outlets seen photo A-in ID soft copper pipe serves con duit also carries negative ground side battery front 46 Model Aviation Bob has charge receptacle box back station wagon uses two standard household dual sockets total four outputs BUT safetys sake mainly couldnt ever plug charger chord house wiring home workshop modified both plug recetacie grounding prong plug has enlarged short length /4-in 0 D bras tubing sweat-soldered place wont fit standard socket now pin has no electrical function Bobs system Hes drilled out car-receptacles %2-in dIameter using several intermediate-size drills Make sure shake out metal pies tic shards before using Take close look bore too touch-up needed 4-output charge-receptacle back Bob Kopskis station wegon Color-code paint redlpositive biackinegative Marc h 1985 column rear car Six local No 12 wires clamped pipe wheel well four go four negative screws pictured outlets six positive lines individually fused up near battery pipe connected negative battery post single massive auto-starter cable back main story concerns easy choice connec tors possibility accidentally plugging charger cordoutfitted ordinary three-prong household plug household wiring could see clearly pile stuff bench pick up charger input lead instead soldering iron wire plug HEATbut iron solution make scenario impossible done pictured soldered short piece A-in OD hobby shop brass tubing over unused ground prong male plug Remember active connection carefully drilled out mating connec tion sockets A2 course some grinding groaning metal contact fingers inside wanted clear hole allow now-oversized plug pin fit same pin able fit ordinary unmodified household outlet thus pro viding protection wanted As inadvertently plugging some inappropriate plug auto outlets much chance should have ap pliances car anyway besides did wrong deed theres generally minimal risk associated applying 12 volts DC ordinary 115 volt AC device plane Charger connections model battery yet another story photographs shows connector pair made Switchcraft Switchcraft parts introduced us Astro supplied charger connections Astro systems course parts available individually Astro through some electronics dis tributors well Over years have found plugs sockets very convenient reliable am using planes Im prejudicing possibility being something better Im looking Lets look first socket jack receptacle very easy install use mounts single round 5A-in holeeasily cut balsa fuselage side sharpened piece brass tubing Once installed its neat unobtrusive Best its always handy Continued page 135 CHARGE-SPLITTER SCHEMATIC DIAGRAM FROMI CHARGER ~A Ii OUTPUTr~B B __ B CHARGE JACK RE NUT TO PLANE #2 _ B CHARGE JACK SKETCH ILLUSTRATES HOW SOLDER LUGS OF SPLITTER JACKS ARE TIED TOGETHER YOU WANT THE 2 AIRBORNE PACKS CHARGED IN SERIES NOT IN PARALLEL charge splitter described text designed charge two planes once using charge systems described May June columns As shown device uses 3 SwItchcraft plugs jacks plastic 35mm film can some wire 51mph fled wiring schematic R presented show 2 output plugs wired seriesthe same current goes both planes TechmCa advice KAVAN DISTRIBUTED BY ~p LTD 4660 BOUL DECARIE BLVD MONTREAL QUE H3X 2H5 CANADA TEL 514 481-8107 CANADIAN DISTRIBUTORS OF 05 MAX FUTABA SUPER TIGRE PILOT GRAUPNER TOPP AYK R/C PLANES R/C BOATS DEALER INQUIRIES INVITED ALOUE1TE2 fixed pitch Special $19900 US ing LOCKHEED 286 L Rigid ective pitch Special $58900 US ping PRICES ARE GOOD ON ORDERS RECEIVED BY THE 1st OF THE MONTH OF THIS ISSUE ONLY July1985 47 svaiIabIe RANGER collective pitch Special $29800 US shipping * * HOURS MONDAY THRU FRIDAY9AM -5PM EASTERN TIME * * K~ - Hosted Indian City Radio Control Club Raffle Ready Fly GPM 540 CAP 21 Less Radio BY Great Planes Model Mfg Co Zenoah G 380 Engine World Engines K & B Super Poxy Finish BY K & B Manufacturing Inc DETROIT EXPO VII Greater Michigan Modelers Show Benjamin F Yack Recreation Center 3131 Third Street Wyandotte Michigan August 24 & 25 MANUFACTURERS STATIC DISPLAYS SWAP-SHOP CASH AWARDS OF SHOW FOR PLANES S e CARS TICS Auction C Refreshments C Free Parking un Luedeman 25505 Chernick Taylor Michigan 481 e 313 295-0569 ground burning pieces fluttering down Just like WW II movie well now James reports Davids post-mor tem revealed fuel pipe frac tured thus causing flames just intended damage surpris ingly bad would expect will live fly again Bob Dolly Wischer S-221 Lapham Peak Rd Delafield WI 53018 RC Electrics/Kopski Continued page 47 no need get inside plane get battery wiring unless course want remove/replace battery Since never remove/change packs field connector perfectly suited needs necessary cool battery model small blower since always take several planes out theres no need immediately replace pack anyway As noted photo two jacks three solder terminals used unused can nipped off normally route two charge-jack wires directly motor battery instead through switch harness arrangement although nothing wrong latter Astro systems uses male connector charger cords compact equally convenient use has two connec tions two-conductor cable connector parts good hundreds matings chargings finally wear out easily replaced low cost way charger cords white 18 gauge lamp cord like visibility grass field especially dusk Electric fliers also use fre quently-supplied two-prong plastic Molex connectors system wir ing charging connection well Personally view Molex-type connector best suited connec tions infrequently accessed such connecting motor switch harness thence battery like use connectors frequent connections such charging has experience Molex connector components fit very tightly new get rather flim sy after numerous uses have experi enced mechanical change signifi cant electrical contact deterioration through use well newer goldplated versions Astro may better last regard mechanical con sideration still remains So stallations may use Molex connectors basic wiring Switchcraft parts always used charging connection however some systems supplied ordinarily require use Molex connectors charg ing Two examples Astro 15 25 systems battery made up two six-packs two seven-packs its own connector indi vidual battery packs connected wiring harness turn wires series form 12- 14-cell batteries run larger motors charging pack disconnected charged indepedent smaller packsomething thats relatively easy 12 volt source like auto battery charger such Astros 4005D Dual Charger course refueling means dis connecting two Molex sets connecting two battery connectors two charging connections disconnecting charging complete reconnecting batteries harness Friends thats whole lotta Molex mating course requires some disassembly some part plane its hatch flight fly lot Id go back rubber hand-launch So what I use simple charging system modification extends its capabilities presented May June columns system concept simple addition Switchcraft jack wired combined 12- 14-cell battery packs plane allows charging batteries simple external connection No disassem bly No wear tear harness connectors flying less fooling around funand thats what hobby about Now want offer easily-assembled accessory can used charge systems device simple deedbeing nothing cable assembly allows previously-present ed systems used charge plane time can see photograph output-splitter low-cost easyto-assemble interconnecting harness use assembled plastic 35mm film container simple plastic housing will Try pill bottle idea use ability charge systems handle large numbers cells though large number may con tained plane cable shown simply connects twoplanes worth batteries series charge system same charge cur rent flows both batteries course total number cells cannot exceed capability charge system As operational example suppose have two planes having six-cell pack other seven-cell pack Ordinarily youd have charge time have two separate charg ers However packs same capacity ie cells same ampere-hour rating can simply connect charge system output cable output splitter input two inputs latter device July 1985 135 Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used 25% Lighter Sandable Carveable Excellent Gap Filling Non-Sagging Superior Strength Sands Carves like Basswoodl l 6 tI oz Equal over 8 wt oz regular epoxys See dealer first write call WL PO Box 19784 St Paul MN 55119 715 425-1397 MODEL MAGIC PRODUCTS 0 Model Magic Filler 0 0 0 0 Comparison Chart Model Magic Product X Adhesion BalsaExcellent Foam Fiberglass Strength Flexing Spreading FuelResistance SandingAs med balsa HardnessAs hard balsa FinishingAny finish/covering Shelf Lifetill used up nntAcceptanceExcellent Water ResistExcellent 0 less methods data available request QSS t4 care enough fill very best very Poorinsist Model Magic Filler Circus Magic Filler Soft balsa Soft balsa 5-7 very Poor two planes would set up charge System operation though 13-cell packbecause effect you have upgraded version simple charge system last months column can charge least 16 cells total three ampsno matter total cell count distributed two planes As always sure both packs run down before commencing charging Some may confused method compared dual-charging capability popular Astro 4005D dual charger two approaches different can accomplish same results some installations Lets get deeper 4005D readily-available low cost way charge two individual battery packs half larger bat tery batteries two models However 4005D can charge two batteries time equal cell count covers cases same ampere-hour capacity way indi vidual packs charged parallel almost actually separated elec trically individual diodes resistors charger output leads Thus charg ing uneven six- seven-cell example mentioned previously no-no~ 4005D designed charge twin packs four seven cells capabilities up 12 Ah charge current available seven cells highly dependent condition 12 volt auto battery case requires 15 minutes time 12 Ah packs Certain other combinations will also require 15 minutes because necessity limit total power handled chargers internal control circuitry 4005D charger has very nice feature smoothly-controllable current setting Its meter measures total current must assume current being divided evenly two packs 4005D provides versatility flexibility lowest cost among products Im familiar withbut havent seen everything earlier description know charge systems presented last two columns operate rather differently fact incorporate chargers such 4005D part system Natural ly cost involved added features capability operating convenience may make such approach attractive fliers individual batteries being charged series via charge-splitter no question getting same current charge Also varied cell-count per pack can accommodated Finally sim ple external connection can handle multi-pack installations system does have limit though can output three amps 12 Ah cells will require least 20 minutes fill up smaller capacities can always get good charge 15 minutes use 4005D part sys tem use its output cords cord course may outfitted charge-splitter achieve two outputs Above please use variable-control feature instead click current control knob fully clockwise use charge system resistor banks establish current level Basic electricity have following column know began Basic Electricity mini-series March issue So far have seen some basic arithmetic relationships govern electrical quantities voltage current resistance power convenience listed again 1 V I 3 R 4P PR V voltage volts current amperes R resistance ohms P power watts first three quantities voltage current resistance quantities can measured sev eral multimeters pictured March issue Power obtained putting known values basic quantities L AFT 100 nIFFERENT OF KIND JILT TO LAST /C MODELS READY FOR SHIPMENT PLEASE SEND $200 FOR COMPLETE CURRENT LIST 136 Model Aviation $595 Sf1 ozi Fillets Filling Repair IUAIITERSCALL VAN ft SCALE PLANS & NOTES $ 2995 46 TIAL KIT & PLANS $12500 yE UILT UP TO ROUGH IT $50000 CALIF 93001 05 61 8500 $11500 PIPER TRI-PACER PA-22 PAN SCALE 5 G643-7616 DH-85LEOPARDMOTHE PAN s 1/4SCALE 5 642-8465 OH-SO PUSS MOTHE SPAN SCALE 5 AMERICAN JUNIOR - v24O4 Interceptor new AJ 404 foldi agsei eg interceptor isa refresher course flow Have Fun youve never flows youll thrill wings enfold soaring flight have flown heforeit will come hack Now can own GREATAMERICAN JUNIOR CLASSII/SYoull love It,and will everyone else 74 OOdr sirglr P0k 5393l.titif 43 Pak5498AlKtlrnsuum 484 Sujlder Kit5395AIRCRAFT CO 4t4Anr550vs no 484 nnrn 4 P04100 97t4800 runP4k LEARN TO FLY Beginners start Out right pro fessional comprehensive training foundimentals covered BasictTraint door & Out entire solo much BE INNERS PAC GE OFFER VIDEO PROGRAMS VHS& BETAS oai PROGRAM LISTINGSC 1BASIC CONSTRUCTION FOR BEGINNERS IN RIC107 Mm 4096 .J 2BASIC FUGNTTMAINING FOR BEGINNERS IN RIC65 Mm 4406 esaloasi foigfOIy detailed stspbyetep instruction Z a 3THE WORLD OF MODEL AVIATION90 Mm 4496eZ Expos Scale meets AMA Nets & 4OSHKOSH OVERVIEW56 Mm 3096 Workshops Foroims Tours AerobatIcs Warblrds & MoreAll 5AIRPLANE FIJNNIES Ifl 3006 Rentals MU See friends others goofing wildest video ever 6US SCALE MASTERS CHAMPIONSHIPS60 MIII 3096Si 495 best scale models pilots competIng top honors 7WARBIROS IN ACTIoN75 MIn 49 OBDERDIG INPOUNAflON Please Read CaeAaUv Avosi al Af sales final RENTAL DEPOSIT full purchase price EACH program ordered difference refunded RENTAL DURATION 1 week after delivery Reserved dates reguire 15 day notice PAYMENT Check 10 day clearance money order Sorry no Visa etc CODs available phone SHIPPING 5375Forelgn Canada add 10% TOTAL others add 15% IL res add 8% tea -SEND GUDERS TO ACAOEMY OF AVIATION RESEARCH & DEVELOPMENT OX 426139 AGO IL 60642 call pizi 4440S 10 am4 pm Man thru SaL fourth equation doing arithmetic serious Electric flier will eventually realize value such measurement ca pability will probably wind up owning least such instrument choices varied mini senes continues well see some features available used readers may familiar other terms RC experience such milliamperes Lets stop square away confusion may come about sort thing basic electrical terms given above several prefixes routinely used make life easier example milliampere 1/1000 ampere Its much easier say one-thousandth ampere prefixes may have heard have scale size commonly used prefixes applicable volts amps ohms micro means 1/1000000 of. milli means 1/1000 of. kilo means 1000 times. mega means 1000000 times. other prefixes like pico nano giga etc often show up hobby usage worked power company youd probably hear expressions like kilovolts megawatts mean thousands volts millions watts respectively Thus common power line voltage parts country 12 Ky 12000 volt line Part city may demand some number MW millions watts see what have sort jargon really abbreviated way talking writing Its easier may offer some initial confusion its much better long run use such expressions looked inside common receivers servos transmitters would find essentially resistors used ranged value few tens ohms about megohm Most would fall between few hundred ohms few hundred thousand ohms would find course could read color codes painted resistor bodies put Electric components ballpark batteries motors fall four 20 volts range motors suitable props draw five 25 amps majority fall six 16 volt 10 15 amp ranges Thus taking limit numbers end find motor input power levels fall between 20 watts very small 500 watts big common ly used ones fall range 60 watts 250 watts Right now everything have flying five planes falls latter range Fornow please forward questions comments SASE please author Happy Electric Landings Parts List parts numbers modifi cation Radio Shack Voltage Inverter described last months column advertantly omitted Refer photo lower riglst corner page 53 June 1985 issue terminal strip cut-down five-lug unit Radio Shack part No 274-688 two 50-volt three amp rectifier diodes Radio Shack part No 276-1141 note direction black-banded end 220 microfarad electrolytic capacitor Radio Shack part No 272-1017 negative lead goes terminal strip Electric event SAM 76s annual Old-Timer meet scheduled July 14 1985 will have added Electric event first time Its no-rules well almost thing wherein requirement model legal Antique Old-Timer design Any electric power system permissible further de tails contact Contest Director Ralph Riddle 2156 Street Rd Warrington PA 18976 Bob Kopski 25 West End Dr Lansdale PA 19446 RC Giht Scale/Beckman Continued page 49 its usually too small Giant Scale models case able build upper panels time complete lower wing just barely fit Sparrowhawk small airplane A-scale lower span less six feet put lower wing jig up side down because has degree negative dihedral As mentioned above wings struts flying wires have removable functional addition struts wires need adjustable struts made aluminum tubing will have spruce strips added bring scale size struts attached machine screws eyebolts wings eyebolts threaded aluminum blocks buried spars running eyebolts out effective length struts can adjusted flying wires made eighth-inch electricians fish tape piece spring steel wire 1-in wide about Y64-in thick available 50- Continued page 140 H ben Old Timer 7ka foam J4o4LL 4/ LMEZOS8 tea Mesa tOot BROOKLYN DODGER 56 Cabin'NEWEST Retail $52 95INTRODUCTORY PRICE $3900 t935 Record Breaker 96 $0956 ls39Zippertf$5356 1938 Kloud KIng 63 $0230 1901 Brigidier 56 $0070 toOl Super Quaker 79 $7276 1940 So Long S0$3036 t$36 Buccaneer 04 $0996 1930 Clipper MKI 72$4156 t937 Dallaire 100 $7516 1035 MIss America 89 $7190 1941 Playboy Sr 50 $5116 1991 Playboy Jr 54 $3116 1938 Powerhouse 54 $53 56 1990 Sailplane 78 $8476 1938 Trenton Terror 12 $4076 1940 Ranger 46$3196 1939 Korda Wake 44 $1916 lO3OAiercury 72 6 kits qualify SAM events FF & R/C feature highest quality machine cut & sanded parts Superior atl Competition sheet strip wood wire & window material Plane orig FE models easily convertible Sch R/C KlTS Sailpianes Electric power Gas Hobby Horn SENSOAR Glidgr 78 5s $1800 Midway Model GNOME R/C Hand Launch Glider$2000 Jolly Models FLINCER R/C HLG 55 Span $2900 Midway Model FAST EDDIE Aerobatic /55 Elec$1900 Jolly Models ELECTRICUS Electric Clider 05a$3250 Leisure PLAYBOY SR 97 Gear 00 Elect $3000 stro ASTRO SPORT 37 Direct 05 Elect$2250 Leisure WASP 37 Direct 05 Electrics $2250 Midway ULTRA MK IV 06 Geared EP $3900 Midway FLYING QUAKER 80 00-454 stroke $6479 4kslMidway DENNY JR 72 Alum Cowel $6396 ptwiTizrNrUFrEErTR1csySTEMWtPIrts Avail SKIPPING & HANDLING 64 Page CATALOGUE Up $800 add $150$200 PP/tat Class $801 $2000 add $225A copy wilt lie sent $2001 $4500 add $300 freewhen requested$4501 $7000 add $350to over $7000 add $400HOBBY HORN CA Addressees add 6% tea15173 Moran St IA Send MO VisaIMCIFEapIPO Box 2212 Check tallow up tO 30Westminster Ca 92600 days CK clearance 1714 8938311 COD Exact Charges plus $150 Hdl iCash OnlylfAft Hrs 1714 89513031 July1985 ii
Edition: Model Aviation - 1985/07
Page Numbers: 46, 47, 135, 136, 137
Radio Control Electrics Bob Kopski MANY modelers use trunk car back station wagon hangar maintenance depot theyre flying field Electric fliers have rather special need comes such usage want talk about month charging connections accessorIes car Theres quite bit interest shown readers March column Among other things column pictured discussed wiring installation made auto battery may recall wrote running heavy cabling directly battery rear station wagon cause thats fly out column photo showed connection scheme battery end may wondering about other end Astro sells 1 very useful Switchoraft connector sets jacks pin 4030 plugs 4029 Theyre $250 eachand well worth iti make charlnconnectlons very convenient Mount jack lower right plane leftover solder lug unused rightmost Plus 5 x oclock Negative Use No 20 22 wires battery pack flight-line charging battery can Improved couple replacement battery clamps autoparts store R Discard clamp-strap cable bolts replacing bolt longer jamnut long bolt good place clamp-on charger battery clip heres what did After considering lot possibilities finally decided use ordinary household outlets plugs 12 volt connec tions choice driven ready availability low cost familiar connectors chose three-prong 'grounded' variety eliminate possibility plugging two-prong ver sion backward Electrically used blade connections third ground connection As side note four previouslydescribed six No 12 conductors wired four positive screws two duplex outlets seen photo A-in ID soft copper pipe serves con duit also carries negative ground side battery front 46 Model Aviation Bob has charge receptacle box back station wagon uses two standard household dual sockets total four outputs BUT safetys sake mainly couldnt ever plug charger chord house wiring home workshop modified both plug recetacie grounding prong plug has enlarged short length /4-in 0 D bras tubing sweat-soldered place wont fit standard socket now pin has no electrical function Bobs system Hes drilled out car-receptacles %2-in dIameter using several intermediate-size drills Make sure shake out metal pies tic shards before using Take close look bore too touch-up needed 4-output charge-receptacle back Bob Kopskis station wegon Color-code paint redlpositive biackinegative Marc h 1985 column rear car Six local No 12 wires clamped pipe wheel well four go four negative screws pictured outlets six positive lines individually fused up near battery pipe connected negative battery post single massive auto-starter cable back main story concerns easy choice connec tors possibility accidentally plugging charger cordoutfitted ordinary three-prong household plug household wiring could see clearly pile stuff bench pick up charger input lead instead soldering iron wire plug HEATbut iron solution make scenario impossible done pictured soldered short piece A-in OD hobby shop brass tubing over unused ground prong male plug Remember active connection carefully drilled out mating connec tion sockets A2 course some grinding groaning metal contact fingers inside wanted clear hole allow now-oversized plug pin fit same pin able fit ordinary unmodified household outlet thus pro viding protection wanted As inadvertently plugging some inappropriate plug auto outlets much chance should have ap pliances car anyway besides did wrong deed theres generally minimal risk associated applying 12 volts DC ordinary 115 volt AC device plane Charger connections model battery yet another story photographs shows connector pair made Switchcraft Switchcraft parts introduced us Astro supplied charger connections Astro systems course parts available individually Astro through some electronics dis tributors well Over years have found plugs sockets very convenient reliable am using planes Im prejudicing possibility being something better Im looking Lets look first socket jack receptacle very easy install use mounts single round 5A-in holeeasily cut balsa fuselage side sharpened piece brass tubing Once installed its neat unobtrusive Best its always handy Continued page 135 CHARGE-SPLITTER SCHEMATIC DIAGRAM FROMI CHARGER ~A Ii OUTPUTr~B B __ B CHARGE JACK RE NUT TO PLANE #2 _ B CHARGE JACK SKETCH ILLUSTRATES HOW SOLDER LUGS OF SPLITTER JACKS ARE TIED TOGETHER YOU WANT THE 2 AIRBORNE PACKS CHARGED IN SERIES NOT IN PARALLEL charge splitter described text designed charge two planes once using charge systems described May June columns As shown device uses 3 SwItchcraft plugs jacks plastic 35mm film can some wire 51mph fled wiring schematic R presented show 2 output plugs wired seriesthe same current goes both planes TechmCa advice KAVAN DISTRIBUTED BY ~p LTD 4660 BOUL DECARIE BLVD MONTREAL QUE H3X 2H5 CANADA TEL 514 481-8107 CANADIAN DISTRIBUTORS OF 05 MAX FUTABA SUPER TIGRE PILOT GRAUPNER TOPP AYK R/C PLANES R/C BOATS DEALER INQUIRIES INVITED ALOUE1TE2 fixed pitch Special $19900 US ing LOCKHEED 286 L Rigid ective pitch Special $58900 US ping PRICES ARE GOOD ON ORDERS RECEIVED BY THE 1st OF THE MONTH OF THIS ISSUE ONLY July1985 47 svaiIabIe RANGER collective pitch Special $29800 US shipping * * HOURS MONDAY THRU FRIDAY9AM -5PM EASTERN TIME * * K~ - Hosted Indian City Radio Control Club Raffle Ready Fly GPM 540 CAP 21 Less Radio BY Great Planes Model Mfg Co Zenoah G 380 Engine World Engines K & B Super Poxy Finish BY K & B Manufacturing Inc DETROIT EXPO VII Greater Michigan Modelers Show Benjamin F Yack Recreation Center 3131 Third Street Wyandotte Michigan August 24 & 25 MANUFACTURERS STATIC DISPLAYS SWAP-SHOP CASH AWARDS OF SHOW FOR PLANES S e CARS TICS Auction C Refreshments C Free Parking un Luedeman 25505 Chernick Taylor Michigan 481 e 313 295-0569 ground burning pieces fluttering down Just like WW II movie well now James reports Davids post-mor tem revealed fuel pipe frac tured thus causing flames just intended damage surpris ingly bad would expect will live fly again Bob Dolly Wischer S-221 Lapham Peak Rd Delafield WI 53018 RC Electrics/Kopski Continued page 47 no need get inside plane get battery wiring unless course want remove/replace battery Since never remove/change packs field connector perfectly suited needs necessary cool battery model small blower since always take several planes out theres no need immediately replace pack anyway As noted photo two jacks three solder terminals used unused can nipped off normally route two charge-jack wires directly motor battery instead through switch harness arrangement although nothing wrong latter Astro systems uses male connector charger cords compact equally convenient use has two connec tions two-conductor cable connector parts good hundreds matings chargings finally wear out easily replaced low cost way charger cords white 18 gauge lamp cord like visibility grass field especially dusk Electric fliers also use fre quently-supplied two-prong plastic Molex connectors system wir ing charging connection well Personally view Molex-type connector best suited connec tions infrequently accessed such connecting motor switch harness thence battery like use connectors frequent connections such charging has experience Molex connector components fit very tightly new get rather flim sy after numerous uses have experi enced mechanical change signifi cant electrical contact deterioration through use well newer goldplated versions Astro may better last regard mechanical con sideration still remains So stallations may use Molex connectors basic wiring Switchcraft parts always used charging connection however some systems supplied ordinarily require use Molex connectors charg ing Two examples Astro 15 25 systems battery made up two six-packs two seven-packs its own connector indi vidual battery packs connected wiring harness turn wires series form 12- 14-cell batteries run larger motors charging pack disconnected charged indepedent smaller packsomething thats relatively easy 12 volt source like auto battery charger such Astros 4005D Dual Charger course refueling means dis connecting two Molex sets connecting two battery connectors two charging connections disconnecting charging complete reconnecting batteries harness Friends thats whole lotta Molex mating course requires some disassembly some part plane its hatch flight fly lot Id go back rubber hand-launch So what I use simple charging system modification extends its capabilities presented May June columns system concept simple addition Switchcraft jack wired combined 12- 14-cell battery packs plane allows charging batteries simple external connection No disassem bly No wear tear harness connectors flying less fooling around funand thats what hobby about Now want offer easily-assembled accessory can used charge systems device simple deedbeing nothing cable assembly allows previously-present ed systems used charge plane time can see photograph output-splitter low-cost easyto-assemble interconnecting harness use assembled plastic 35mm film container simple plastic housing will Try pill bottle idea use ability charge systems handle large numbers cells though large number may con tained plane cable shown simply connects twoplanes worth batteries series charge system same charge cur rent flows both batteries course total number cells cannot exceed capability charge system As operational example suppose have two planes having six-cell pack other seven-cell pack Ordinarily youd have charge time have two separate charg ers However packs same capacity ie cells same ampere-hour rating can simply connect charge system output cable output splitter input two inputs latter device July 1985 135 Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used 25% Lighter Sandable Carveable Excellent Gap Filling Non-Sagging Superior Strength Sands Carves like Basswoodl l 6 tI oz Equal over 8 wt oz regular epoxys See dealer first write call WL PO Box 19784 St Paul MN 55119 715 425-1397 MODEL MAGIC PRODUCTS 0 Model Magic Filler 0 0 0 0 Comparison Chart Model Magic Product X Adhesion BalsaExcellent Foam Fiberglass Strength Flexing Spreading FuelResistance SandingAs med balsa HardnessAs hard balsa FinishingAny finish/covering Shelf Lifetill used up nntAcceptanceExcellent Water ResistExcellent 0 less methods data available request QSS t4 care enough fill very best very Poorinsist Model Magic Filler Circus Magic Filler Soft balsa Soft balsa 5-7 very Poor two planes would set up charge System operation though 13-cell packbecause effect you have upgraded version simple charge system last months column can charge least 16 cells total three ampsno matter total cell count distributed two planes As always sure both packs run down before commencing charging Some may confused method compared dual-charging capability popular Astro 4005D dual charger two approaches different can accomplish same results some installations Lets get deeper 4005D readily-available low cost way charge two individual battery packs half larger bat tery batteries two models However 4005D can charge two batteries time equal cell count covers cases same ampere-hour capacity way indi vidual packs charged parallel almost actually separated elec trically individual diodes resistors charger output leads Thus charg ing uneven six- seven-cell example mentioned previously no-no~ 4005D designed charge twin packs four seven cells capabilities up 12 Ah charge current available seven cells highly dependent condition 12 volt auto battery case requires 15 minutes time 12 Ah packs Certain other combinations will also require 15 minutes because necessity limit total power handled chargers internal control circuitry 4005D charger has very nice feature smoothly-controllable current setting Its meter measures total current must assume current being divided evenly two packs 4005D provides versatility flexibility lowest cost among products Im familiar withbut havent seen everything earlier description know charge systems presented last two columns operate rather differently fact incorporate chargers such 4005D part system Natural ly cost involved added features capability operating convenience may make such approach attractive fliers individual batteries being charged series via charge-splitter no question getting same current charge Also varied cell-count per pack can accommodated Finally sim ple external connection can handle multi-pack installations system does have limit though can output three amps 12 Ah cells will require least 20 minutes fill up smaller capacities can always get good charge 15 minutes use 4005D part sys tem use its output cords cord course may outfitted charge-splitter achieve two outputs Above please use variable-control feature instead click current control knob fully clockwise use charge system resistor banks establish current level Basic electricity have following column know began Basic Electricity mini-series March issue So far have seen some basic arithmetic relationships govern electrical quantities voltage current resistance power convenience listed again 1 V I 3 R 4P PR V voltage volts current amperes R resistance ohms P power watts first three quantities voltage current resistance quantities can measured sev eral multimeters pictured March issue Power obtained putting known values basic quantities L AFT 100 nIFFERENT OF KIND JILT TO LAST /C MODELS READY FOR SHIPMENT PLEASE SEND $200 FOR COMPLETE CURRENT LIST 136 Model Aviation $595 Sf1 ozi Fillets Filling Repair IUAIITERSCALL VAN ft SCALE PLANS & NOTES $ 2995 46 TIAL KIT & PLANS $12500 yE UILT UP TO ROUGH IT $50000 CALIF 93001 05 61 8500 $11500 PIPER TRI-PACER PA-22 PAN SCALE 5 G643-7616 DH-85LEOPARDMOTHE PAN s 1/4SCALE 5 642-8465 OH-SO PUSS MOTHE SPAN SCALE 5 AMERICAN JUNIOR - v24O4 Interceptor new AJ 404 foldi agsei eg interceptor isa refresher course flow Have Fun youve never flows youll thrill wings enfold soaring flight have flown heforeit will come hack Now can own GREATAMERICAN JUNIOR CLASSII/SYoull love It,and will everyone else 74 OOdr sirglr P0k 5393l.titif 43 Pak5498AlKtlrnsuum 484 Sujlder Kit5395AIRCRAFT CO 4t4Anr550vs no 484 nnrn 4 P04100 97t4800 runP4k LEARN TO FLY Beginners start Out right pro fessional comprehensive training foundimentals covered BasictTraint door & Out entire solo much BE INNERS PAC GE OFFER VIDEO PROGRAMS VHS& BETAS oai PROGRAM LISTINGSC 1BASIC CONSTRUCTION FOR BEGINNERS IN RIC107 Mm 4096 .J 2BASIC FUGNTTMAINING FOR BEGINNERS IN RIC65 Mm 4406 esaloasi foigfOIy detailed stspbyetep instruction Z a 3THE WORLD OF MODEL AVIATION90 Mm 4496eZ Expos Scale meets AMA Nets & 4OSHKOSH OVERVIEW56 Mm 3096 Workshops Foroims Tours AerobatIcs Warblrds & MoreAll 5AIRPLANE FIJNNIES Ifl 3006 Rentals MU See friends others goofing wildest video ever 6US SCALE MASTERS CHAMPIONSHIPS60 MIII 3096Si 495 best scale models pilots competIng top honors 7WARBIROS IN ACTIoN75 MIn 49 OBDERDIG INPOUNAflON Please Read CaeAaUv Avosi al Af sales final RENTAL DEPOSIT full purchase price EACH program ordered difference refunded RENTAL DURATION 1 week after delivery Reserved dates reguire 15 day notice PAYMENT Check 10 day clearance money order Sorry no Visa etc CODs available phone SHIPPING 5375Forelgn Canada add 10% TOTAL others add 15% IL res add 8% tea -SEND GUDERS TO ACAOEMY OF AVIATION RESEARCH & DEVELOPMENT OX 426139 AGO IL 60642 call pizi 4440S 10 am4 pm Man thru SaL fourth equation doing arithmetic serious Electric flier will eventually realize value such measurement ca pability will probably wind up owning least such instrument choices varied mini senes continues well see some features available used readers may familiar other terms RC experience such milliamperes Lets stop square away confusion may come about sort thing basic electrical terms given above several prefixes routinely used make life easier example milliampere 1/1000 ampere Its much easier say one-thousandth ampere prefixes may have heard have scale size commonly used prefixes applicable volts amps ohms micro means 1/1000000 of. milli means 1/1000 of. kilo means 1000 times. mega means 1000000 times. other prefixes like pico nano giga etc often show up hobby usage worked power company youd probably hear expressions like kilovolts megawatts mean thousands volts millions watts respectively Thus common power line voltage parts country 12 Ky 12000 volt line Part city may demand some number MW millions watts see what have sort jargon really abbreviated way talking writing Its easier may offer some initial confusion its much better long run use such expressions looked inside common receivers servos transmitters would find essentially resistors used ranged value few tens ohms about megohm Most would fall between few hundred ohms few hundred thousand ohms would find course could read color codes painted resistor bodies put Electric components ballpark batteries motors fall four 20 volts range motors suitable props draw five 25 amps majority fall six 16 volt 10 15 amp ranges Thus taking limit numbers end find motor input power levels fall between 20 watts very small 500 watts big common ly used ones fall range 60 watts 250 watts Right now everything have flying five planes falls latter range Fornow please forward questions comments SASE please author Happy Electric Landings Parts List parts numbers modifi cation Radio Shack Voltage Inverter described last months column advertantly omitted Refer photo lower riglst corner page 53 June 1985 issue terminal strip cut-down five-lug unit Radio Shack part No 274-688 two 50-volt three amp rectifier diodes Radio Shack part No 276-1141 note direction black-banded end 220 microfarad electrolytic capacitor Radio Shack part No 272-1017 negative lead goes terminal strip Electric event SAM 76s annual Old-Timer meet scheduled July 14 1985 will have added Electric event first time Its no-rules well almost thing wherein requirement model legal Antique Old-Timer design Any electric power system permissible further de tails contact Contest Director Ralph Riddle 2156 Street Rd Warrington PA 18976 Bob Kopski 25 West End Dr Lansdale PA 19446 RC Giht Scale/Beckman Continued page 49 its usually too small Giant Scale models case able build upper panels time complete lower wing just barely fit Sparrowhawk small airplane A-scale lower span less six feet put lower wing jig up side down because has degree negative dihedral As mentioned above wings struts flying wires have removable functional addition struts wires need adjustable struts made aluminum tubing will have spruce strips added bring scale size struts attached machine screws eyebolts wings eyebolts threaded aluminum blocks buried spars running eyebolts out effective length struts can adjusted flying wires made eighth-inch electricians fish tape piece spring steel wire 1-in wide about Y64-in thick available 50- Continued page 140 H ben Old Timer 7ka foam J4o4LL 4/ LMEZOS8 tea Mesa tOot BROOKLYN DODGER 56 Cabin'NEWEST Retail $52 95INTRODUCTORY PRICE $3900 t935 Record Breaker 96 $0956 ls39Zippertf$5356 1938 Kloud KIng 63 $0230 1901 Brigidier 56 $0070 toOl Super Quaker 79 $7276 1940 So Long S0$3036 t$36 Buccaneer 04 $0996 1930 Clipper MKI 72$4156 t937 Dallaire 100 $7516 1035 MIss America 89 $7190 1941 Playboy Sr 50 $5116 1991 Playboy Jr 54 $3116 1938 Powerhouse 54 $53 56 1990 Sailplane 78 $8476 1938 Trenton Terror 12 $4076 1940 Ranger 46$3196 1939 Korda Wake 44 $1916 lO3OAiercury 72 6 kits qualify SAM events FF & R/C feature highest quality machine cut & sanded parts Superior atl Competition sheet strip wood wire & window material Plane orig FE models easily convertible Sch R/C KlTS Sailpianes Electric power Gas Hobby Horn SENSOAR Glidgr 78 5s $1800 Midway Model GNOME R/C Hand Launch Glider$2000 Jolly Models FLINCER R/C HLG 55 Span $2900 Midway Model FAST EDDIE Aerobatic /55 Elec$1900 Jolly Models ELECTRICUS Electric Clider 05a$3250 Leisure PLAYBOY SR 97 Gear 00 Elect $3000 stro ASTRO SPORT 37 Direct 05 Elect$2250 Leisure WASP 37 Direct 05 Electrics $2250 Midway ULTRA MK IV 06 Geared EP $3900 Midway FLYING QUAKER 80 00-454 stroke $6479 4kslMidway DENNY JR 72 Alum Cowel $6396 ptwiTizrNrUFrEErTR1csySTEMWtPIrts Avail SKIPPING & HANDLING 64 Page CATALOGUE Up $800 add $150$200 PP/tat Class $801 $2000 add $225A copy wilt lie sent $2001 $4500 add $300 freewhen requested$4501 $7000 add $350to over $7000 add $400HOBBY HORN CA Addressees add 6% tea15173 Moran St IA Send MO VisaIMCIFEapIPO Box 2212 Check tallow up tO 30Westminster Ca 92600 days CK clearance 1714 8938311 COD Exact Charges plus $150 Hdl iCash OnlylfAft Hrs 1714 89513031 July1985 ii