RADIO CONTROL ELECTRICS uI. THIS MONTHS column offers some special battery charging discharging stories seems couple years manage run auto battery down charging motor packs happened again few weeks ago exactly surprise time car warned few times some sluggish starting sounds ignored original battery 96 Voyager minivan fact battery lasted two years given way use something new Previous OEM batteries failed after just few months deep-cycle usethe kind use battery likely have lots motor-pack charging know car maker has upgraded battery specification follows below replacement Interstate-brand battery installed within day always choose brand because serviceable can actually check fluid adjust needed auto batteries like original sealed maintenance-free kind previous experience cannot tolerate deep-cycle applications Whether OEM battery better previous ones two things quite different about charging system car compared others Ive experienced Perhaps account improved battery service life know sure behaviors account motor pack charging difficulties road earlier columns described routing wiring vehicle battery front through minivan hangar area back installation allows charge en route field technique has working well nearly 20 years now theres change Ive used ammeter car alternator output nearly two decades allows see whats happening function time engine running Normally alternator supplies substantial charge current car battery right after starting might expected After few minutes driving charge current drops near zero after having replenished battery starting discharge However Im charging packs engine running ammeter indicates alternator current going chargers Its normal ammeter show rather high sustained charge current during trip home flying session because car battery now comparatively well-discharged fact since trip field about five miles car battery usually recharged time return home hook up standard auto battery charger bring battery way up 16 15 14 ITI January1999 97 GRAPH ONE NEW AND USED 17 AH SCRC CHARGE CHARACTERISTICS ill CYCLE 10 CELL BATTERY VOLTAGE DURING CONSTANTOAMP CI-ARGE/PEAE DETECTOR CHARGER 18 17 16 U I0 15 m 14___________________ 13 12 0iS2030 CHARGE TIME Minutes New PackUsed Pack _____ _____ _____ GRAPH TWO NEW AND USED 17 AH SCRC DISCHARGE CHARACTERISTICS 1st CYCLV10 CEU BATTERY VOYAGE GORING CONSTANT 10 AMP C SCARCE TO EECTRON C OAG 14 13 12 El H 0 - 11 El H H El 10 S 5258ic DISCHARGE TIME Minutes New Pack Pack GRAPH THREE USED 17 AH SCRC CHARGE CHARACTERISTICS 1st & 2nd CYCLE 15 CALL BATTERY TERMINAL VOLTAGE BERAVIOR GORING CONSTANTS AMP CHARGE PEAK DETECTOR CHARGER 18 17 B H 0 3El El I El 13 SiS2530 CHARGE TIME Minutes 1st Cycle2nd Cycle Composites fk sty-LeSe1ectton Fo4tSekvLce Carbon Fiber Braided Sleeves Laminates Plates Sandwich Panels Rods Tubes Unidirectional 81-directional Fabrics Tissues Tapes Prepreg Fiberglass 19 Styles Cloth Woven Unidirectioriol Broids Tapes Tissue Chopped Mat Epoxy WEST SYSTEM PRO-SET brand Epoxies Filler Accessories Tools Vacuum Bagging Pumps Bagging Kits Systems Bag Seals Breathers/Bleeders Bagging Release Materials Foam Rohacell Spyder EPP Ask about CST Savers Club Call FREE catalog Order Toll Free 1-800-338-1278 E-mail info@cstsalescom Visit Web Site wwwcstsalescom U Composite Structure Technology P 0 Box 622 Dept JS Tehachapi CA 93581-0622 Technical Support 805-822-4162 Fax 805-822-4121 RC modeler should experience flying Lazy Bee kit $59 Incredible slow speeds allow flying anywhere can lots flying doesnt want fly huge control surfaces make maneuverable its never boring expert pilots Aero-bee-atics close personal favorite modeler already has lazy Bee get $39 Aileron Wing enhanced Bee-atics $24 Float Kit makes Bee convertible land sea snow flying $84 Speedy Bee speediest Bee build flies slowly Ive learned judge time needed ammeter indication during trip home two hours usually does Because normally pay much attention ammeter Ive also noticing periodic short-duration high-magnitude discharge currents indicating meter strong needle swings blink-of-theeye quickIm guessing magnitudes greater 50 amps appears auto charging/charging control system hits car battery some stocKing stuffer ideas $10 Bee Video hour long guaranteed amazing model airplane show video Trexler Ballon Wheels look great prevent damage $15 3 Wheel Set Make favorite modelers next covering job lot easier Get Easytex covering $1275 roll its quickest easiest & strongest iron-on fabric Choose 22 colors small plane lovers have smallest RC gear 1/3 oz Servos $21 new 24 gram Servo Kit $60 4 amp 7 gram high eff BEC speed control $60 periodic burst discharges whenever car running reminds burp charge technique sometimes used Ni-Cd chargers dont know its same thing Ive also noticed car voltage varies quite bit during normal driving predominantly speed can tell because have voltmeter installed right alongside ammeter prior auto experience car system voltage rock steady comparison December 24th last possible day place Christmas order t ee auiation PO Box 4125 Mesa AZ 85211-4125 Tel 602 649-1534 98 Model Aviation E* Ni 0 GRAPH FOUR USED 17 AH SCRC DISCHARGE CHARACTERISTICS 1st & 2nd CYCLE 10 CELL eATTERY TERMINAL VOLTAGE BEHAVIOR OLRING CONSTANT 10 AMP DISCHARGE TO ELECTRONIC CAD 14 13 12 CS F 0 - 11 w F F m iS N 5245S15 DISCHARGE TME MISSION lot Cycle2nd Cycle half-volt motion see during normal driving now comes what Some motor pack chargers tolerate above behavior some continue steadily charging packs alternator current spikes system voltage motion notwithstanding example Astro 1 lOD Peak Charger simply shrugs off behavior continues delivering chosen output current though being powered solid supplywhen isnt IlOD has great line regulation term used describe supply delivers constant output despite vaiying input other hand SR Smart Charger/Cycler cannot tolerate described behavior charger regulated fact output current moves accordance input voltage input voltage drops output current drops happens motor pack terminal voltage drops little causing charger think pack has peaked turn causes charger shut down can whole lotta false peaking going during just short trip field Since en route charging fundamentally important Ive given up chargers am now using two 1 lODs simultaneously Ill probably add third SRs work fine engines running shop thats what need Note never problem previous vehicles SRs 96 Plymouth Voyager simply dont mix know other newer cars similar electrical system behavior Id guess other late-model Chrysler products might candidates Sanyo 1700 SCRC cells very popular motor packs being same nominal size weight historic 1 200s 1 400s have use modelers flightline However very disturbing characteristic has manifesting itself 1 700s after some use particular packs cells display increasing tendency false peak used has nothing story above misbehavior typically seen first charge day following some period no useeven little overnight Typically older pack may false-peak several times first few minutes charge act normally within flying session decided study carefully accompanying graphs show what Ive able quantify far graphs compare two 10-cell 1700 SCRC packs under charge discharge conditions bench pack has about 10 flights other nearly 200 Neither pack seen service few days dead prior testing t73cd5t3n931P7tb7tt x 1W Prop 26x 12$ 1225 Irvually avaiiaole 3W 71100120/140 B2 Johnson Smoke Mufflers 3W 2 cycle oil 170 mix 3315 oz $1375 l99lT0CHats$1250 Fuel Foot $70 3WVelocTy StacKs $1795 43% Giles G 2O2 Designed nyTOC Pilot Wolfgang Matt W ngspan 14 length IC C 202 features Gel-coated Finerglass fuselage pretsilt w ngs 3WI2OiB2Fano stabs removable 96cc 729 in5Sleeves Wngtabe ano Staotsbe inscalled 847 lbs hp74L x 22WA emns e evator ano roder ready 3W-I40iB2-FI 550ninged 1376cc / 839 4' anding gear sJpport nstalled & Frewall 857 lbs bp74Lx l25W.nstalled 202 Kit 3W240 82 1w n 23 HP 3W sG 202 6 Ports gs per cylinder IS HP l with 3W 2OiB2IF $2295$2195Giles0 Quality repair service 3W factory trained technician 3W-60i 3W-701 3W-48 1B2 3W-78 B2 3W-I 20 iB2 3W-140 iB2 60 oo/36 in3 60 HP 528 lb 60L x 40W Prop 22 x 12 70 oc/42 in3 • 65 HP 528 lb 60L x 4OW Prop 22 x 12 48 ooI29 in3 50 HP 454 lb x O3W Prop 20 x 12 78 cc/465 in3 • 74 HP 65 lb 57L x II 0W Prop 24 x IC 1196 oc/729 in3 • 115 HP 847 lb 124W Prop 28 x 12 1376 oo/839 in3 135 HP 858 lb 69L x 30W Prop 30 x 12 Aircraft International Inc Phone 73276k0997 3W Sales & ServIce Center 8 Country Meadow Drive Colts Neck Nj 07722Fax 73276 8585 Visit website wwwaircraft-intlcom cali Grand Opening Specias 100 Model Aviation y3W Front Intake _Motors avs well Smoke Mufflers 3W Motors made 3W-Modeilmotoren .... ..ude electronic auto advance ignition $ 1350 24422t-P 26/s 29v27tW Prop 18x IC $ 479 $ 1950 $ 3195 $ 3295 $585 $675 $795 $1095 $1350 $1530 battery terminal voltage data automatically recorded computercontrolled data acquisition system numeric data 400 points individual curve imported spreadsheet program graphing Referring Graph its clear used pack displaying strange behavior right start charge pack initially displays rather high terminal voltage begins decline immediately sharp spikes result Astro 1 lOD Peak Charger stopping charge sensed declining terminal voltagejust like pack truly peaked battery clearly displays strange behavior nearly six minutes charge charger shut down six times during period time quickly reset keep going Finally battery terminal voltage settled normal-looking pattern time Obvious Graph new pack behaved normally throughout charge periodno false peaks Both packs finally peaked customary fashion around 25-26 minutes charger shut down should Graph Two compares discharge curves both packs following first charges Clearly new pack looks newit holds higher terminal voltage longer comparison well-used pack looks limp beginning around seven minutes flight used pack will yield diminishing flight performance faster new pack its still quite useful sport flying Graph Three combines first second charge-of-the-day data used pack spikey curve simply repeat Graph smooth curve same pack its second charge test session curves may look like different packs arent What difference bench flight makes Clearly sitting shelf day creates wild monster flight tames think suggestion never stop flying Graph Four just impacting Graph Three lookalike discharge curves correspond two wildly different charge curves Graph Three data Graph Four would never suspect adventure seen Graph Three have offer month intend pursue matter further hopefully have report later thinkand hope confirmthat first charge frustration may eliminated routine use slow charger between flying sessions See Large Pack Slow Charger MA July 97 meantime may cussing chargers false peaking maybe older pack blame charging road late-model Plymouth Voyager Readers have received referenced Slow Charger article rather well Im getting nice reports reader satisfaction requests variations such multiple outputs metering etc As saystay tuned Regarding ongoing speed control development Ive pursuing see November 1998 column ESC circuit function Ive included recently adjustable motor cutoff function distinguished BEC function Ive experimenting MCO see its beneficial motor packseven before got new pack/used pack behavior above Ive setting up some ESCs cut back motor drain pack approaches predetermined level Ive using 9 volts/cell starters Ive wondering packs better off long term instead being able severely depleted charge often happens end flight Now interest greater will take long time see MCC idea pays off Another stay tuned So ends first column New Year Please have happy safe holiday season great Electri-flyin New Year Please include SASE correspondence youd like reply 4Superior Balsa & Hobby Supply 700 AM 700 tp//pw2netcomcom/-balsalsupenorhtm baIsa@ixnetcomcom sr CA TIME 1 2020-G Centralia Hawaiian Gardens CA 90716 Monday Saturday se add sufficient amaunt excess refunded shipping UPS Parcel Post LL $285 handling 800 488-9525 $1500 Mm order accept Visa Mastercard Checks CA sales add 825% sales tax Info 562865-3220 FAX 562860-0327 Complete price list-SASE Shop hours 800AM 300PM Mon/Fri 5/98 BALSA Aircraft Sitka Spruce 3 x balsa price STICKSBass 2 balsa price 1/16 14CI43W481/4 RiCH3648 1/16o1/161011401142230 1/19o3/32101/403162733 1/16 1/610Ia11401122941 1/1603/16Il151/4o5/93750 1/160I/4/2151/403/44250 1/16r3/61319 1/1001/21721h/Ia61Ca..392L.A87 22265/1605/162730 5/16 03/03130 3i32EiCld381L.4875/160103646 3/320 3/3211125/1603/44662 3/3 3/3201/4141631603/63645 3/32o3/a15Ia3/6a1/240 97 3/2201/216 243/6o5/647 04 3/3203/426 323/803/453 66 i/WHCN-- 1ft--i6-4V 1/601/0 1/2 49 94 1/603/16 5/6 97 76 1/901/4 1/203/4 90 62 1/903/i 1/601/2 tt38aW 1/9o3/4 2636 5/605/6 60 66 5/aol 63 114 3/16 RiCH 3W68 3/16o3/16 Other Fine Products 3/16o 1/4 NHP Wesi Sysiems 3/1603/6 2126& Bob Sm/IS Epoxy 3/1601/2 s Supplies 3/1603/4 mposuts Hardware BALSA SHEETS 1/16012945 3/320131 42 1/6ol25 46 3/100 13659 1/4xl52 76 3/90167 66 1/20176104 3 INCH36 48 1/3702/90 1/16023650 3/32024861 1/9024695 3/16o280 74 1/4 o26690 3/9 0296 119 1/2 o2110 143 3 INCH3648 1/22024260 1/16034460 3/32025267 1/6 026364 3/160378103 1/4 0394130 9/1603106102 3/9 03115170 1/2 03150200 1/3204 84 92 1/16o466 92 3/320462114 1/6 0493134 3/1604109156 1/4 04102176 3/9 04210295 1/3 04295336 TRAILING EDGES 36LAr 3/1603/43547 1/4 013664 1/6 01/2 j2937 5/16011/44671 3/6011/20495 1/20290 3/403160 36 AILERONS 1/401 97 1/4011/4 95 1/4011/374 1/402it 90 5/160 /14II 74 5/1601-1/2It 75 9/16o2II69 3/60295 3/60 11/263 3/6o2-1/2136 1/2011/299 1/2 02 109 36 TRIANGLES 3/9o3/6 -7I 33 3/403/4 -0, 101 36 BIRCH DOWELS 1/9165/1627 311917 Q3/637 1/4201/254 36 LEADING EDGES Cor/velOonalSvIomleSlCal 1/403/6903/0031675 3/601/2691/201/2105 1003/41403/4o3/4100 3/401170101195 Ldg 6096 ReflecOve Tape 350 WiDE BALSA SHEETS h&Bafl3a41 1/19141225200315 302160247225345 1/9179279290390 3/16209314266440 1/4235360325530 3/6300477420695 1/2510595715990 BALSA BLOCKS 24303W 4W 101030tiS 1020601891902/5 103120235265320 100197325379420 202176245292336 2a3/66350423460 204269450536710 2o2230505706660 3044607109291235 40405000013501600 Aircraft Grade Birch P1 ood 6512 12012 12x24 12040 40040 1u94 ____ 310/5145295535 1035 3600 -3l/y951 190305670 2500 1/16 30/591015/22556702500 SPly14027552510203900 3/5ri/ari/a4259103200 Te 510/515029557511204000 3/18 4/7/ 992003476692600 -ii. O pty1252303807352950 3/s 150295550 1000 3900 1/2 910/5215375615 1200 4550 1/5 Lila P06/i951252404751750 1/4 Lit pop/ar 1 25 1 95 345 6752550 Trook CASBob Smith Flash Bargain Balsa Bundles362 95483 95 OBECHI 1/32o 12l1000 105' $65155p901i/y Thin1/2 oz2101 FOAM SHEETS 6/ae2o12o24 395 Oap or1023493001/3203/9/ 1/3204 /91/601/6/30//19/12/ 1001/2 /9/____ /30/I3/1603/l61/401/413/603/6 ISiok2 oz595500I/16o3 /91 1/16o4 /9/i/6o3/16 /32/ 3/i6o 1/4122/ 1/4o3/9 /15/ 3/6o 1/2 /10/ 1/2o3/4 /6oie 201202417560420240401326 inkS9 oz179516503/3203 /9/ 3/3204 51/60 1/4 /3O/3/I60316/20/ 1/401/2 /14/ 3/603/4 / 8/SOltie 2024049930EPO 2x 12o24550 ~ l8oz30001/9 03 /9 1/6 04 /4/1/603/6 /29/ 31190 1/2 /17 1/403/4 /10/ 200ihin9ap6log soeoooe5 50 3/16 x35/ 3/1604 /2/1/601/2 /20/ 3/16x3/4 /12/Limited availability -Cxli05ite4o 12024 350010102019046 1550 046161/2oz455 5aI ISo11/4 03 /4 1/4 04 13/1/803/4 /15///ElenotesquantitvperbuoodleSVNi4o24o46 1275 EPP2o36o45 3000 0ap 1 oz945665 3/9 03 /3 3/6 04 /2* Some sums woronholes & inularsfloor/c Foam CulOng Wire 9 feel $300 Thiok2 OZ149512001/2 03 /2 1/2 04 /2/" UPS ovesoze sh4pp/o charge 10/ 30 0/5 102 Model Aviation /rI densty 5460500 cal pnces Migrs & Ona/ars Send reseler program Poons suteo/ 10 oSonge
Edition: Model Aviation - 1999/01
Page Numbers: 97, 98, 100, 102
Edition: Model Aviation - 1999/01
Page Numbers: 97, 98, 100, 102
RADIO CONTROL ELECTRICS uI. THIS MONTHS column offers some special battery charging discharging stories seems couple years manage run auto battery down charging motor packs happened again few weeks ago exactly surprise time car warned few times some sluggish starting sounds ignored original battery 96 Voyager minivan fact battery lasted two years given way use something new Previous OEM batteries failed after just few months deep-cycle usethe kind use battery likely have lots motor-pack charging know car maker has upgraded battery specification follows below replacement Interstate-brand battery installed within day always choose brand because serviceable can actually check fluid adjust needed auto batteries like original sealed maintenance-free kind previous experience cannot tolerate deep-cycle applications Whether OEM battery better previous ones two things quite different about charging system car compared others Ive experienced Perhaps account improved battery service life know sure behaviors account motor pack charging difficulties road earlier columns described routing wiring vehicle battery front through minivan hangar area back installation allows charge en route field technique has working well nearly 20 years now theres change Ive used ammeter car alternator output nearly two decades allows see whats happening function time engine running Normally alternator supplies substantial charge current car battery right after starting might expected After few minutes driving charge current drops near zero after having replenished battery starting discharge However Im charging packs engine running ammeter indicates alternator current going chargers Its normal ammeter show rather high sustained charge current during trip home flying session because car battery now comparatively well-discharged fact since trip field about five miles car battery usually recharged time return home hook up standard auto battery charger bring battery way up 16 15 14 ITI January1999 97 GRAPH ONE NEW AND USED 17 AH SCRC CHARGE CHARACTERISTICS ill CYCLE 10 CELL BATTERY VOLTAGE DURING CONSTANTOAMP CI-ARGE/PEAE DETECTOR CHARGER 18 17 16 U I0 15 m 14___________________ 13 12 0iS2030 CHARGE TIME Minutes New PackUsed Pack _____ _____ _____ GRAPH TWO NEW AND USED 17 AH SCRC DISCHARGE CHARACTERISTICS 1st CYCLV10 CEU BATTERY VOYAGE GORING CONSTANT 10 AMP C SCARCE TO EECTRON C OAG 14 13 12 El H 0 - 11 El H H El 10 S 5258ic DISCHARGE TIME Minutes New Pack Pack GRAPH THREE USED 17 AH SCRC CHARGE CHARACTERISTICS 1st & 2nd CYCLE 15 CALL BATTERY TERMINAL VOLTAGE BERAVIOR GORING CONSTANTS AMP CHARGE PEAK DETECTOR CHARGER 18 17 B H 0 3El El I El 13 SiS2530 CHARGE TIME Minutes 1st Cycle2nd Cycle Composites fk sty-LeSe1ectton Fo4tSekvLce Carbon Fiber Braided Sleeves Laminates Plates Sandwich Panels Rods Tubes Unidirectional 81-directional Fabrics Tissues Tapes Prepreg Fiberglass 19 Styles Cloth Woven Unidirectioriol Broids Tapes Tissue Chopped Mat Epoxy WEST SYSTEM PRO-SET brand Epoxies Filler Accessories Tools Vacuum Bagging Pumps Bagging Kits Systems Bag Seals Breathers/Bleeders Bagging Release Materials Foam Rohacell Spyder EPP Ask about CST Savers Club Call FREE catalog Order Toll Free 1-800-338-1278 E-mail info@cstsalescom Visit Web Site wwwcstsalescom U Composite Structure Technology P 0 Box 622 Dept JS Tehachapi CA 93581-0622 Technical Support 805-822-4162 Fax 805-822-4121 RC modeler should experience flying Lazy Bee kit $59 Incredible slow speeds allow flying anywhere can lots flying doesnt want fly huge control surfaces make maneuverable its never boring expert pilots Aero-bee-atics close personal favorite modeler already has lazy Bee get $39 Aileron Wing enhanced Bee-atics $24 Float Kit makes Bee convertible land sea snow flying $84 Speedy Bee speediest Bee build flies slowly Ive learned judge time needed ammeter indication during trip home two hours usually does Because normally pay much attention ammeter Ive also noticing periodic short-duration high-magnitude discharge currents indicating meter strong needle swings blink-of-theeye quickIm guessing magnitudes greater 50 amps appears auto charging/charging control system hits car battery some stocKing stuffer ideas $10 Bee Video hour long guaranteed amazing model airplane show video Trexler Ballon Wheels look great prevent damage $15 3 Wheel Set Make favorite modelers next covering job lot easier Get Easytex covering $1275 roll its quickest easiest & strongest iron-on fabric Choose 22 colors small plane lovers have smallest RC gear 1/3 oz Servos $21 new 24 gram Servo Kit $60 4 amp 7 gram high eff BEC speed control $60 periodic burst discharges whenever car running reminds burp charge technique sometimes used Ni-Cd chargers dont know its same thing Ive also noticed car voltage varies quite bit during normal driving predominantly speed can tell because have voltmeter installed right alongside ammeter prior auto experience car system voltage rock steady comparison December 24th last possible day place Christmas order t ee auiation PO Box 4125 Mesa AZ 85211-4125 Tel 602 649-1534 98 Model Aviation E* Ni 0 GRAPH FOUR USED 17 AH SCRC DISCHARGE CHARACTERISTICS 1st & 2nd CYCLE 10 CELL eATTERY TERMINAL VOLTAGE BEHAVIOR OLRING CONSTANT 10 AMP DISCHARGE TO ELECTRONIC CAD 14 13 12 CS F 0 - 11 w F F m iS N 5245S15 DISCHARGE TME MISSION lot Cycle2nd Cycle half-volt motion see during normal driving now comes what Some motor pack chargers tolerate above behavior some continue steadily charging packs alternator current spikes system voltage motion notwithstanding example Astro 1 lOD Peak Charger simply shrugs off behavior continues delivering chosen output current though being powered solid supplywhen isnt IlOD has great line regulation term used describe supply delivers constant output despite vaiying input other hand SR Smart Charger/Cycler cannot tolerate described behavior charger regulated fact output current moves accordance input voltage input voltage drops output current drops happens motor pack terminal voltage drops little causing charger think pack has peaked turn causes charger shut down can whole lotta false peaking going during just short trip field Since en route charging fundamentally important Ive given up chargers am now using two 1 lODs simultaneously Ill probably add third SRs work fine engines running shop thats what need Note never problem previous vehicles SRs 96 Plymouth Voyager simply dont mix know other newer cars similar electrical system behavior Id guess other late-model Chrysler products might candidates Sanyo 1700 SCRC cells very popular motor packs being same nominal size weight historic 1 200s 1 400s have use modelers flightline However very disturbing characteristic has manifesting itself 1 700s after some use particular packs cells display increasing tendency false peak used has nothing story above misbehavior typically seen first charge day following some period no useeven little overnight Typically older pack may false-peak several times first few minutes charge act normally within flying session decided study carefully accompanying graphs show what Ive able quantify far graphs compare two 10-cell 1700 SCRC packs under charge discharge conditions bench pack has about 10 flights other nearly 200 Neither pack seen service few days dead prior testing t73cd5t3n931P7tb7tt x 1W Prop 26x 12$ 1225 Irvually avaiiaole 3W 71100120/140 B2 Johnson Smoke Mufflers 3W 2 cycle oil 170 mix 3315 oz $1375 l99lT0CHats$1250 Fuel Foot $70 3WVelocTy StacKs $1795 43% Giles G 2O2 Designed nyTOC Pilot Wolfgang Matt W ngspan 14 length IC C 202 features Gel-coated Finerglass fuselage pretsilt w ngs 3WI2OiB2Fano stabs removable 96cc 729 in5Sleeves Wngtabe ano Staotsbe inscalled 847 lbs hp74L x 22WA emns e evator ano roder ready 3W-I40iB2-FI 550ninged 1376cc / 839 4' anding gear sJpport nstalled & Frewall 857 lbs bp74Lx l25W.nstalled 202 Kit 3W240 82 1w n 23 HP 3W sG 202 6 Ports gs per cylinder IS HP l with 3W 2OiB2IF $2295$2195Giles0 Quality repair service 3W factory trained technician 3W-60i 3W-701 3W-48 1B2 3W-78 B2 3W-I 20 iB2 3W-140 iB2 60 oo/36 in3 60 HP 528 lb 60L x 40W Prop 22 x 12 70 oc/42 in3 • 65 HP 528 lb 60L x 4OW Prop 22 x 12 48 ooI29 in3 50 HP 454 lb x O3W Prop 20 x 12 78 cc/465 in3 • 74 HP 65 lb 57L x II 0W Prop 24 x IC 1196 oc/729 in3 • 115 HP 847 lb 124W Prop 28 x 12 1376 oo/839 in3 135 HP 858 lb 69L x 30W Prop 30 x 12 Aircraft International Inc Phone 73276k0997 3W Sales & ServIce Center 8 Country Meadow Drive Colts Neck Nj 07722Fax 73276 8585 Visit website wwwaircraft-intlcom cali Grand Opening Specias 100 Model Aviation y3W Front Intake _Motors avs well Smoke Mufflers 3W Motors made 3W-Modeilmotoren .... ..ude electronic auto advance ignition $ 1350 24422t-P 26/s 29v27tW Prop 18x IC $ 479 $ 1950 $ 3195 $ 3295 $585 $675 $795 $1095 $1350 $1530 battery terminal voltage data automatically recorded computercontrolled data acquisition system numeric data 400 points individual curve imported spreadsheet program graphing Referring Graph its clear used pack displaying strange behavior right start charge pack initially displays rather high terminal voltage begins decline immediately sharp spikes result Astro 1 lOD Peak Charger stopping charge sensed declining terminal voltagejust like pack truly peaked battery clearly displays strange behavior nearly six minutes charge charger shut down six times during period time quickly reset keep going Finally battery terminal voltage settled normal-looking pattern time Obvious Graph new pack behaved normally throughout charge periodno false peaks Both packs finally peaked customary fashion around 25-26 minutes charger shut down should Graph Two compares discharge curves both packs following first charges Clearly new pack looks newit holds higher terminal voltage longer comparison well-used pack looks limp beginning around seven minutes flight used pack will yield diminishing flight performance faster new pack its still quite useful sport flying Graph Three combines first second charge-of-the-day data used pack spikey curve simply repeat Graph smooth curve same pack its second charge test session curves may look like different packs arent What difference bench flight makes Clearly sitting shelf day creates wild monster flight tames think suggestion never stop flying Graph Four just impacting Graph Three lookalike discharge curves correspond two wildly different charge curves Graph Three data Graph Four would never suspect adventure seen Graph Three have offer month intend pursue matter further hopefully have report later thinkand hope confirmthat first charge frustration may eliminated routine use slow charger between flying sessions See Large Pack Slow Charger MA July 97 meantime may cussing chargers false peaking maybe older pack blame charging road late-model Plymouth Voyager Readers have received referenced Slow Charger article rather well Im getting nice reports reader satisfaction requests variations such multiple outputs metering etc As saystay tuned Regarding ongoing speed control development Ive pursuing see November 1998 column ESC circuit function Ive included recently adjustable motor cutoff function distinguished BEC function Ive experimenting MCO see its beneficial motor packseven before got new pack/used pack behavior above Ive setting up some ESCs cut back motor drain pack approaches predetermined level Ive using 9 volts/cell starters Ive wondering packs better off long term instead being able severely depleted charge often happens end flight Now interest greater will take long time see MCC idea pays off Another stay tuned So ends first column New Year Please have happy safe holiday season great Electri-flyin New Year Please include SASE correspondence youd like reply 4Superior Balsa & Hobby Supply 700 AM 700 tp//pw2netcomcom/-balsalsupenorhtm baIsa@ixnetcomcom sr CA TIME 1 2020-G Centralia Hawaiian Gardens CA 90716 Monday Saturday se add sufficient amaunt excess refunded shipping UPS Parcel Post LL $285 handling 800 488-9525 $1500 Mm order accept Visa Mastercard Checks CA sales add 825% sales tax Info 562865-3220 FAX 562860-0327 Complete price list-SASE Shop hours 800AM 300PM Mon/Fri 5/98 BALSA Aircraft Sitka Spruce 3 x balsa price STICKSBass 2 balsa price 1/16 14CI43W481/4 RiCH3648 1/16o1/161011401142230 1/19o3/32101/403162733 1/16 1/610Ia11401122941 1/1603/16Il151/4o5/93750 1/160I/4/2151/403/44250 1/16r3/61319 1/1001/21721h/Ia61Ca..392L.A87 22265/1605/162730 5/16 03/03130 3i32EiCld381L.4875/160103646 3/320 3/3211125/1603/44662 3/3 3/3201/4141631603/63645 3/32o3/a15Ia3/6a1/240 97 3/2201/216 243/6o5/647 04 3/3203/426 323/803/453 66 i/WHCN-- 1ft--i6-4V 1/601/0 1/2 49 94 1/603/16 5/6 97 76 1/901/4 1/203/4 90 62 1/903/i 1/601/2 tt38aW 1/9o3/4 2636 5/605/6 60 66 5/aol 63 114 3/16 RiCH 3W68 3/16o3/16 Other Fine Products 3/16o 1/4 NHP Wesi Sysiems 3/1603/6 2126& Bob Sm/IS Epoxy 3/1601/2 s Supplies 3/1603/4 mposuts Hardware BALSA SHEETS 1/16012945 3/320131 42 1/6ol25 46 3/100 13659 1/4xl52 76 3/90167 66 1/20176104 3 INCH36 48 1/3702/90 1/16023650 3/32024861 1/9024695 3/16o280 74 1/4 o26690 3/9 0296 119 1/2 o2110 143 3 INCH3648 1/22024260 1/16034460 3/32025267 1/6 026364 3/160378103 1/4 0394130 9/1603106102 3/9 03115170 1/2 03150200 1/3204 84 92 1/16o466 92 3/320462114 1/6 0493134 3/1604109156 1/4 04102176 3/9 04210295 1/3 04295336 TRAILING EDGES 36LAr 3/1603/43547 1/4 013664 1/6 01/2 j2937 5/16011/44671 3/6011/20495 1/20290 3/403160 36 AILERONS 1/401 97 1/4011/4 95 1/4011/374 1/402it 90 5/160 /14II 74 5/1601-1/2It 75 9/16o2II69 3/60295 3/60 11/263 3/6o2-1/2136 1/2011/299 1/2 02 109 36 TRIANGLES 3/9o3/6 -7I 33 3/403/4 -0, 101 36 BIRCH DOWELS 1/9165/1627 311917 Q3/637 1/4201/254 36 LEADING EDGES Cor/velOonalSvIomleSlCal 1/403/6903/0031675 3/601/2691/201/2105 1003/41403/4o3/4100 3/401170101195 Ldg 6096 ReflecOve Tape 350 WiDE BALSA SHEETS h&Bafl3a41 1/19141225200315 302160247225345 1/9179279290390 3/16209314266440 1/4235360325530 3/6300477420695 1/2510595715990 BALSA BLOCKS 24303W 4W 101030tiS 1020601891902/5 103120235265320 100197325379420 202176245292336 2a3/66350423460 204269450536710 2o2230505706660 3044607109291235 40405000013501600 Aircraft Grade Birch P1 ood 6512 12012 12x24 12040 40040 1u94 ____ 310/5145295535 1035 3600 -3l/y951 190305670 2500 1/16 30/591015/22556702500 SPly14027552510203900 3/5ri/ari/a4259103200 Te 510/515029557511204000 3/18 4/7/ 992003476692600 -ii. O pty1252303807352950 3/s 150295550 1000 3900 1/2 910/5215375615 1200 4550 1/5 Lila P06/i951252404751750 1/4 Lit pop/ar 1 25 1 95 345 6752550 Trook CASBob Smith Flash Bargain Balsa Bundles362 95483 95 OBECHI 1/32o 12l1000 105' $65155p901i/y Thin1/2 oz2101 FOAM SHEETS 6/ae2o12o24 395 Oap or1023493001/3203/9/ 1/3204 /91/601/6/30//19/12/ 1001/2 /9/____ /30/I3/1603/l61/401/413/603/6 ISiok2 oz595500I/16o3 /91 1/16o4 /9/i/6o3/16 /32/ 3/i6o 1/4122/ 1/4o3/9 /15/ 3/6o 1/2 /10/ 1/2o3/4 /6oie 201202417560420240401326 inkS9 oz179516503/3203 /9/ 3/3204 51/60 1/4 /3O/3/I60316/20/ 1/401/2 /14/ 3/603/4 / 8/SOltie 2024049930EPO 2x 12o24550 ~ l8oz30001/9 03 /9 1/6 04 /4/1/603/6 /29/ 31190 1/2 /17 1/403/4 /10/ 200ihin9ap6log soeoooe5 50 3/16 x35/ 3/1604 /2/1/601/2 /20/ 3/16x3/4 /12/Limited availability -Cxli05ite4o 12024 350010102019046 1550 046161/2oz455 5aI ISo11/4 03 /4 1/4 04 13/1/803/4 /15///ElenotesquantitvperbuoodleSVNi4o24o46 1275 EPP2o36o45 3000 0ap 1 oz945665 3/9 03 /3 3/6 04 /2* Some sums woronholes & inularsfloor/c Foam CulOng Wire 9 feel $300 Thiok2 OZ149512001/2 03 /2 1/2 04 /2/" UPS ovesoze sh4pp/o charge 10/ 30 0/5 102 Model Aviation /rI densty 5460500 cal pnces Migrs & Ona/ars Send reseler program Poons suteo/ 10 oSonge
Edition: Model Aviation - 1999/01
Page Numbers: 97, 98, 100, 102
RADIO CONTROL ELECTRICS uI. THIS MONTHS column offers some special battery charging discharging stories seems couple years manage run auto battery down charging motor packs happened again few weeks ago exactly surprise time car warned few times some sluggish starting sounds ignored original battery 96 Voyager minivan fact battery lasted two years given way use something new Previous OEM batteries failed after just few months deep-cycle usethe kind use battery likely have lots motor-pack charging know car maker has upgraded battery specification follows below replacement Interstate-brand battery installed within day always choose brand because serviceable can actually check fluid adjust needed auto batteries like original sealed maintenance-free kind previous experience cannot tolerate deep-cycle applications Whether OEM battery better previous ones two things quite different about charging system car compared others Ive experienced Perhaps account improved battery service life know sure behaviors account motor pack charging difficulties road earlier columns described routing wiring vehicle battery front through minivan hangar area back installation allows charge en route field technique has working well nearly 20 years now theres change Ive used ammeter car alternator output nearly two decades allows see whats happening function time engine running Normally alternator supplies substantial charge current car battery right after starting might expected After few minutes driving charge current drops near zero after having replenished battery starting discharge However Im charging packs engine running ammeter indicates alternator current going chargers Its normal ammeter show rather high sustained charge current during trip home flying session because car battery now comparatively well-discharged fact since trip field about five miles car battery usually recharged time return home hook up standard auto battery charger bring battery way up 16 15 14 ITI January1999 97 GRAPH ONE NEW AND USED 17 AH SCRC CHARGE CHARACTERISTICS ill CYCLE 10 CELL BATTERY VOLTAGE DURING CONSTANTOAMP CI-ARGE/PEAE DETECTOR CHARGER 18 17 16 U I0 15 m 14___________________ 13 12 0iS2030 CHARGE TIME Minutes New PackUsed Pack _____ _____ _____ GRAPH TWO NEW AND USED 17 AH SCRC DISCHARGE CHARACTERISTICS 1st CYCLV10 CEU BATTERY VOYAGE GORING CONSTANT 10 AMP C SCARCE TO EECTRON C OAG 14 13 12 El H 0 - 11 El H H El 10 S 5258ic DISCHARGE TIME Minutes New Pack Pack GRAPH THREE USED 17 AH SCRC CHARGE CHARACTERISTICS 1st & 2nd CYCLE 15 CALL BATTERY TERMINAL VOLTAGE BERAVIOR GORING CONSTANTS AMP CHARGE PEAK DETECTOR CHARGER 18 17 B H 0 3El El I El 13 SiS2530 CHARGE TIME Minutes 1st Cycle2nd Cycle Composites fk sty-LeSe1ectton Fo4tSekvLce Carbon Fiber Braided Sleeves Laminates Plates Sandwich Panels Rods Tubes Unidirectional 81-directional Fabrics Tissues Tapes Prepreg Fiberglass 19 Styles Cloth Woven Unidirectioriol Broids Tapes Tissue Chopped Mat Epoxy WEST SYSTEM PRO-SET brand Epoxies Filler Accessories Tools Vacuum Bagging Pumps Bagging Kits Systems Bag Seals Breathers/Bleeders Bagging Release Materials Foam Rohacell Spyder EPP Ask about CST Savers Club Call FREE catalog Order Toll Free 1-800-338-1278 E-mail info@cstsalescom Visit Web Site wwwcstsalescom U Composite Structure Technology P 0 Box 622 Dept JS Tehachapi CA 93581-0622 Technical Support 805-822-4162 Fax 805-822-4121 RC modeler should experience flying Lazy Bee kit $59 Incredible slow speeds allow flying anywhere can lots flying doesnt want fly huge control surfaces make maneuverable its never boring expert pilots Aero-bee-atics close personal favorite modeler already has lazy Bee get $39 Aileron Wing enhanced Bee-atics $24 Float Kit makes Bee convertible land sea snow flying $84 Speedy Bee speediest Bee build flies slowly Ive learned judge time needed ammeter indication during trip home two hours usually does Because normally pay much attention ammeter Ive also noticing periodic short-duration high-magnitude discharge currents indicating meter strong needle swings blink-of-theeye quickIm guessing magnitudes greater 50 amps appears auto charging/charging control system hits car battery some stocKing stuffer ideas $10 Bee Video hour long guaranteed amazing model airplane show video Trexler Ballon Wheels look great prevent damage $15 3 Wheel Set Make favorite modelers next covering job lot easier Get Easytex covering $1275 roll its quickest easiest & strongest iron-on fabric Choose 22 colors small plane lovers have smallest RC gear 1/3 oz Servos $21 new 24 gram Servo Kit $60 4 amp 7 gram high eff BEC speed control $60 periodic burst discharges whenever car running reminds burp charge technique sometimes used Ni-Cd chargers dont know its same thing Ive also noticed car voltage varies quite bit during normal driving predominantly speed can tell because have voltmeter installed right alongside ammeter prior auto experience car system voltage rock steady comparison December 24th last possible day place Christmas order t ee auiation PO Box 4125 Mesa AZ 85211-4125 Tel 602 649-1534 98 Model Aviation E* Ni 0 GRAPH FOUR USED 17 AH SCRC DISCHARGE CHARACTERISTICS 1st & 2nd CYCLE 10 CELL eATTERY TERMINAL VOLTAGE BEHAVIOR OLRING CONSTANT 10 AMP DISCHARGE TO ELECTRONIC CAD 14 13 12 CS F 0 - 11 w F F m iS N 5245S15 DISCHARGE TME MISSION lot Cycle2nd Cycle half-volt motion see during normal driving now comes what Some motor pack chargers tolerate above behavior some continue steadily charging packs alternator current spikes system voltage motion notwithstanding example Astro 1 lOD Peak Charger simply shrugs off behavior continues delivering chosen output current though being powered solid supplywhen isnt IlOD has great line regulation term used describe supply delivers constant output despite vaiying input other hand SR Smart Charger/Cycler cannot tolerate described behavior charger regulated fact output current moves accordance input voltage input voltage drops output current drops happens motor pack terminal voltage drops little causing charger think pack has peaked turn causes charger shut down can whole lotta false peaking going during just short trip field Since en route charging fundamentally important Ive given up chargers am now using two 1 lODs simultaneously Ill probably add third SRs work fine engines running shop thats what need Note never problem previous vehicles SRs 96 Plymouth Voyager simply dont mix know other newer cars similar electrical system behavior Id guess other late-model Chrysler products might candidates Sanyo 1700 SCRC cells very popular motor packs being same nominal size weight historic 1 200s 1 400s have use modelers flightline However very disturbing characteristic has manifesting itself 1 700s after some use particular packs cells display increasing tendency false peak used has nothing story above misbehavior typically seen first charge day following some period no useeven little overnight Typically older pack may false-peak several times first few minutes charge act normally within flying session decided study carefully accompanying graphs show what Ive able quantify far graphs compare two 10-cell 1700 SCRC packs under charge discharge conditions bench pack has about 10 flights other nearly 200 Neither pack seen service few days dead prior testing t73cd5t3n931P7tb7tt x 1W Prop 26x 12$ 1225 Irvually avaiiaole 3W 71100120/140 B2 Johnson Smoke Mufflers 3W 2 cycle oil 170 mix 3315 oz $1375 l99lT0CHats$1250 Fuel Foot $70 3WVelocTy StacKs $1795 43% Giles G 2O2 Designed nyTOC Pilot Wolfgang Matt W ngspan 14 length IC C 202 features Gel-coated Finerglass fuselage pretsilt w ngs 3WI2OiB2Fano stabs removable 96cc 729 in5Sleeves Wngtabe ano Staotsbe inscalled 847 lbs hp74L x 22WA emns e evator ano roder ready 3W-I40iB2-FI 550ninged 1376cc / 839 4' anding gear sJpport nstalled & Frewall 857 lbs bp74Lx l25W.nstalled 202 Kit 3W240 82 1w n 23 HP 3W sG 202 6 Ports gs per cylinder IS HP l with 3W 2OiB2IF $2295$2195Giles0 Quality repair service 3W factory trained technician 3W-60i 3W-701 3W-48 1B2 3W-78 B2 3W-I 20 iB2 3W-140 iB2 60 oo/36 in3 60 HP 528 lb 60L x 40W Prop 22 x 12 70 oc/42 in3 • 65 HP 528 lb 60L x 4OW Prop 22 x 12 48 ooI29 in3 50 HP 454 lb x O3W Prop 20 x 12 78 cc/465 in3 • 74 HP 65 lb 57L x II 0W Prop 24 x IC 1196 oc/729 in3 • 115 HP 847 lb 124W Prop 28 x 12 1376 oo/839 in3 135 HP 858 lb 69L x 30W Prop 30 x 12 Aircraft International Inc Phone 73276k0997 3W Sales & ServIce Center 8 Country Meadow Drive Colts Neck Nj 07722Fax 73276 8585 Visit website wwwaircraft-intlcom cali Grand Opening Specias 100 Model Aviation y3W Front Intake _Motors avs well Smoke Mufflers 3W Motors made 3W-Modeilmotoren .... ..ude electronic auto advance ignition $ 1350 24422t-P 26/s 29v27tW Prop 18x IC $ 479 $ 1950 $ 3195 $ 3295 $585 $675 $795 $1095 $1350 $1530 battery terminal voltage data automatically recorded computercontrolled data acquisition system numeric data 400 points individual curve imported spreadsheet program graphing Referring Graph its clear used pack displaying strange behavior right start charge pack initially displays rather high terminal voltage begins decline immediately sharp spikes result Astro 1 lOD Peak Charger stopping charge sensed declining terminal voltagejust like pack truly peaked battery clearly displays strange behavior nearly six minutes charge charger shut down six times during period time quickly reset keep going Finally battery terminal voltage settled normal-looking pattern time Obvious Graph new pack behaved normally throughout charge periodno false peaks Both packs finally peaked customary fashion around 25-26 minutes charger shut down should Graph Two compares discharge curves both packs following first charges Clearly new pack looks newit holds higher terminal voltage longer comparison well-used pack looks limp beginning around seven minutes flight used pack will yield diminishing flight performance faster new pack its still quite useful sport flying Graph Three combines first second charge-of-the-day data used pack spikey curve simply repeat Graph smooth curve same pack its second charge test session curves may look like different packs arent What difference bench flight makes Clearly sitting shelf day creates wild monster flight tames think suggestion never stop flying Graph Four just impacting Graph Three lookalike discharge curves correspond two wildly different charge curves Graph Three data Graph Four would never suspect adventure seen Graph Three have offer month intend pursue matter further hopefully have report later thinkand hope confirmthat first charge frustration may eliminated routine use slow charger between flying sessions See Large Pack Slow Charger MA July 97 meantime may cussing chargers false peaking maybe older pack blame charging road late-model Plymouth Voyager Readers have received referenced Slow Charger article rather well Im getting nice reports reader satisfaction requests variations such multiple outputs metering etc As saystay tuned Regarding ongoing speed control development Ive pursuing see November 1998 column ESC circuit function Ive included recently adjustable motor cutoff function distinguished BEC function Ive experimenting MCO see its beneficial motor packseven before got new pack/used pack behavior above Ive setting up some ESCs cut back motor drain pack approaches predetermined level Ive using 9 volts/cell starters Ive wondering packs better off long term instead being able severely depleted charge often happens end flight Now interest greater will take long time see MCC idea pays off Another stay tuned So ends first column New Year Please have happy safe holiday season great Electri-flyin New Year Please include SASE correspondence youd like reply 4Superior Balsa & Hobby Supply 700 AM 700 tp//pw2netcomcom/-balsalsupenorhtm baIsa@ixnetcomcom sr CA TIME 1 2020-G Centralia Hawaiian Gardens CA 90716 Monday Saturday se add sufficient amaunt excess refunded shipping UPS Parcel Post LL $285 handling 800 488-9525 $1500 Mm order accept Visa Mastercard Checks CA sales add 825% sales tax Info 562865-3220 FAX 562860-0327 Complete price list-SASE Shop hours 800AM 300PM Mon/Fri 5/98 BALSA Aircraft Sitka Spruce 3 x balsa price STICKSBass 2 balsa price 1/16 14CI43W481/4 RiCH3648 1/16o1/161011401142230 1/19o3/32101/403162733 1/16 1/610Ia11401122941 1/1603/16Il151/4o5/93750 1/160I/4/2151/403/44250 1/16r3/61319 1/1001/21721h/Ia61Ca..392L.A87 22265/1605/162730 5/16 03/03130 3i32EiCld381L.4875/160103646 3/320 3/3211125/1603/44662 3/3 3/3201/4141631603/63645 3/32o3/a15Ia3/6a1/240 97 3/2201/216 243/6o5/647 04 3/3203/426 323/803/453 66 i/WHCN-- 1ft--i6-4V 1/601/0 1/2 49 94 1/603/16 5/6 97 76 1/901/4 1/203/4 90 62 1/903/i 1/601/2 tt38aW 1/9o3/4 2636 5/605/6 60 66 5/aol 63 114 3/16 RiCH 3W68 3/16o3/16 Other Fine Products 3/16o 1/4 NHP Wesi Sysiems 3/1603/6 2126& Bob Sm/IS Epoxy 3/1601/2 s Supplies 3/1603/4 mposuts Hardware BALSA SHEETS 1/16012945 3/320131 42 1/6ol25 46 3/100 13659 1/4xl52 76 3/90167 66 1/20176104 3 INCH36 48 1/3702/90 1/16023650 3/32024861 1/9024695 3/16o280 74 1/4 o26690 3/9 0296 119 1/2 o2110 143 3 INCH3648 1/22024260 1/16034460 3/32025267 1/6 026364 3/160378103 1/4 0394130 9/1603106102 3/9 03115170 1/2 03150200 1/3204 84 92 1/16o466 92 3/320462114 1/6 0493134 3/1604109156 1/4 04102176 3/9 04210295 1/3 04295336 TRAILING EDGES 36LAr 3/1603/43547 1/4 013664 1/6 01/2 j2937 5/16011/44671 3/6011/20495 1/20290 3/403160 36 AILERONS 1/401 97 1/4011/4 95 1/4011/374 1/402it 90 5/160 /14II 74 5/1601-1/2It 75 9/16o2II69 3/60295 3/60 11/263 3/6o2-1/2136 1/2011/299 1/2 02 109 36 TRIANGLES 3/9o3/6 -7I 33 3/403/4 -0, 101 36 BIRCH DOWELS 1/9165/1627 311917 Q3/637 1/4201/254 36 LEADING EDGES Cor/velOonalSvIomleSlCal 1/403/6903/0031675 3/601/2691/201/2105 1003/41403/4o3/4100 3/401170101195 Ldg 6096 ReflecOve Tape 350 WiDE BALSA SHEETS h&Bafl3a41 1/19141225200315 302160247225345 1/9179279290390 3/16209314266440 1/4235360325530 3/6300477420695 1/2510595715990 BALSA BLOCKS 24303W 4W 101030tiS 1020601891902/5 103120235265320 100197325379420 202176245292336 2a3/66350423460 204269450536710 2o2230505706660 3044607109291235 40405000013501600 Aircraft Grade Birch P1 ood 6512 12012 12x24 12040 40040 1u94 ____ 310/5145295535 1035 3600 -3l/y951 190305670 2500 1/16 30/591015/22556702500 SPly14027552510203900 3/5ri/ari/a4259103200 Te 510/515029557511204000 3/18 4/7/ 992003476692600 -ii. O pty1252303807352950 3/s 150295550 1000 3900 1/2 910/5215375615 1200 4550 1/5 Lila P06/i951252404751750 1/4 Lit pop/ar 1 25 1 95 345 6752550 Trook CASBob Smith Flash Bargain Balsa Bundles362 95483 95 OBECHI 1/32o 12l1000 105' $65155p901i/y Thin1/2 oz2101 FOAM SHEETS 6/ae2o12o24 395 Oap or1023493001/3203/9/ 1/3204 /91/601/6/30//19/12/ 1001/2 /9/____ /30/I3/1603/l61/401/413/603/6 ISiok2 oz595500I/16o3 /91 1/16o4 /9/i/6o3/16 /32/ 3/i6o 1/4122/ 1/4o3/9 /15/ 3/6o 1/2 /10/ 1/2o3/4 /6oie 201202417560420240401326 inkS9 oz179516503/3203 /9/ 3/3204 51/60 1/4 /3O/3/I60316/20/ 1/401/2 /14/ 3/603/4 / 8/SOltie 2024049930EPO 2x 12o24550 ~ l8oz30001/9 03 /9 1/6 04 /4/1/603/6 /29/ 31190 1/2 /17 1/403/4 /10/ 200ihin9ap6log soeoooe5 50 3/16 x35/ 3/1604 /2/1/601/2 /20/ 3/16x3/4 /12/Limited availability -Cxli05ite4o 12024 350010102019046 1550 046161/2oz455 5aI ISo11/4 03 /4 1/4 04 13/1/803/4 /15///ElenotesquantitvperbuoodleSVNi4o24o46 1275 EPP2o36o45 3000 0ap 1 oz945665 3/9 03 /3 3/6 04 /2* Some sums woronholes & inularsfloor/c Foam CulOng Wire 9 feel $300 Thiok2 OZ149512001/2 03 /2 1/2 04 /2/" UPS ovesoze sh4pp/o charge 10/ 30 0/5 102 Model Aviation /rI densty 5460500 cal pnces Migrs & Ona/ars Send reseler program Poons suteo/ 10 oSonge
Edition: Model Aviation - 1999/01
Page Numbers: 97, 98, 100, 102
RADIO CONTROL ELECTRICS uI. THIS MONTHS column offers some special battery charging discharging stories seems couple years manage run auto battery down charging motor packs happened again few weeks ago exactly surprise time car warned few times some sluggish starting sounds ignored original battery 96 Voyager minivan fact battery lasted two years given way use something new Previous OEM batteries failed after just few months deep-cycle usethe kind use battery likely have lots motor-pack charging know car maker has upgraded battery specification follows below replacement Interstate-brand battery installed within day always choose brand because serviceable can actually check fluid adjust needed auto batteries like original sealed maintenance-free kind previous experience cannot tolerate deep-cycle applications Whether OEM battery better previous ones two things quite different about charging system car compared others Ive experienced Perhaps account improved battery service life know sure behaviors account motor pack charging difficulties road earlier columns described routing wiring vehicle battery front through minivan hangar area back installation allows charge en route field technique has working well nearly 20 years now theres change Ive used ammeter car alternator output nearly two decades allows see whats happening function time engine running Normally alternator supplies substantial charge current car battery right after starting might expected After few minutes driving charge current drops near zero after having replenished battery starting discharge However Im charging packs engine running ammeter indicates alternator current going chargers Its normal ammeter show rather high sustained charge current during trip home flying session because car battery now comparatively well-discharged fact since trip field about five miles car battery usually recharged time return home hook up standard auto battery charger bring battery way up 16 15 14 ITI January1999 97 GRAPH ONE NEW AND USED 17 AH SCRC CHARGE CHARACTERISTICS ill CYCLE 10 CELL BATTERY VOLTAGE DURING CONSTANTOAMP CI-ARGE/PEAE DETECTOR CHARGER 18 17 16 U I0 15 m 14___________________ 13 12 0iS2030 CHARGE TIME Minutes New PackUsed Pack _____ _____ _____ GRAPH TWO NEW AND USED 17 AH SCRC DISCHARGE CHARACTERISTICS 1st CYCLV10 CEU BATTERY VOYAGE GORING CONSTANT 10 AMP C SCARCE TO EECTRON C OAG 14 13 12 El H 0 - 11 El H H El 10 S 5258ic DISCHARGE TIME Minutes New Pack Pack GRAPH THREE USED 17 AH SCRC CHARGE CHARACTERISTICS 1st & 2nd CYCLE 15 CALL BATTERY TERMINAL VOLTAGE BERAVIOR GORING CONSTANTS AMP CHARGE PEAK DETECTOR CHARGER 18 17 B H 0 3El El I El 13 SiS2530 CHARGE TIME Minutes 1st Cycle2nd Cycle Composites fk sty-LeSe1ectton Fo4tSekvLce Carbon Fiber Braided Sleeves Laminates Plates Sandwich Panels Rods Tubes Unidirectional 81-directional Fabrics Tissues Tapes Prepreg Fiberglass 19 Styles Cloth Woven Unidirectioriol Broids Tapes Tissue Chopped Mat Epoxy WEST SYSTEM PRO-SET brand Epoxies Filler Accessories Tools Vacuum Bagging Pumps Bagging Kits Systems Bag Seals Breathers/Bleeders Bagging Release Materials Foam Rohacell Spyder EPP Ask about CST Savers Club Call FREE catalog Order Toll Free 1-800-338-1278 E-mail info@cstsalescom Visit Web Site wwwcstsalescom U Composite Structure Technology P 0 Box 622 Dept JS Tehachapi CA 93581-0622 Technical Support 805-822-4162 Fax 805-822-4121 RC modeler should experience flying Lazy Bee kit $59 Incredible slow speeds allow flying anywhere can lots flying doesnt want fly huge control surfaces make maneuverable its never boring expert pilots Aero-bee-atics close personal favorite modeler already has lazy Bee get $39 Aileron Wing enhanced Bee-atics $24 Float Kit makes Bee convertible land sea snow flying $84 Speedy Bee speediest Bee build flies slowly Ive learned judge time needed ammeter indication during trip home two hours usually does Because normally pay much attention ammeter Ive also noticing periodic short-duration high-magnitude discharge currents indicating meter strong needle swings blink-of-theeye quickIm guessing magnitudes greater 50 amps appears auto charging/charging control system hits car battery some stocKing stuffer ideas $10 Bee Video hour long guaranteed amazing model airplane show video Trexler Ballon Wheels look great prevent damage $15 3 Wheel Set Make favorite modelers next covering job lot easier Get Easytex covering $1275 roll its quickest easiest & strongest iron-on fabric Choose 22 colors small plane lovers have smallest RC gear 1/3 oz Servos $21 new 24 gram Servo Kit $60 4 amp 7 gram high eff BEC speed control $60 periodic burst discharges whenever car running reminds burp charge technique sometimes used Ni-Cd chargers dont know its same thing Ive also noticed car voltage varies quite bit during normal driving predominantly speed can tell because have voltmeter installed right alongside ammeter prior auto experience car system voltage rock steady comparison December 24th last possible day place Christmas order t ee auiation PO Box 4125 Mesa AZ 85211-4125 Tel 602 649-1534 98 Model Aviation E* Ni 0 GRAPH FOUR USED 17 AH SCRC DISCHARGE CHARACTERISTICS 1st & 2nd CYCLE 10 CELL eATTERY TERMINAL VOLTAGE BEHAVIOR OLRING CONSTANT 10 AMP DISCHARGE TO ELECTRONIC CAD 14 13 12 CS F 0 - 11 w F F m iS N 5245S15 DISCHARGE TME MISSION lot Cycle2nd Cycle half-volt motion see during normal driving now comes what Some motor pack chargers tolerate above behavior some continue steadily charging packs alternator current spikes system voltage motion notwithstanding example Astro 1 lOD Peak Charger simply shrugs off behavior continues delivering chosen output current though being powered solid supplywhen isnt IlOD has great line regulation term used describe supply delivers constant output despite vaiying input other hand SR Smart Charger/Cycler cannot tolerate described behavior charger regulated fact output current moves accordance input voltage input voltage drops output current drops happens motor pack terminal voltage drops little causing charger think pack has peaked turn causes charger shut down can whole lotta false peaking going during just short trip field Since en route charging fundamentally important Ive given up chargers am now using two 1 lODs simultaneously Ill probably add third SRs work fine engines running shop thats what need Note never problem previous vehicles SRs 96 Plymouth Voyager simply dont mix know other newer cars similar electrical system behavior Id guess other late-model Chrysler products might candidates Sanyo 1700 SCRC cells very popular motor packs being same nominal size weight historic 1 200s 1 400s have use modelers flightline However very disturbing characteristic has manifesting itself 1 700s after some use particular packs cells display increasing tendency false peak used has nothing story above misbehavior typically seen first charge day following some period no useeven little overnight Typically older pack may false-peak several times first few minutes charge act normally within flying session decided study carefully accompanying graphs show what Ive able quantify far graphs compare two 10-cell 1700 SCRC packs under charge discharge conditions bench pack has about 10 flights other nearly 200 Neither pack seen service few days dead prior testing t73cd5t3n931P7tb7tt x 1W Prop 26x 12$ 1225 Irvually avaiiaole 3W 71100120/140 B2 Johnson Smoke Mufflers 3W 2 cycle oil 170 mix 3315 oz $1375 l99lT0CHats$1250 Fuel Foot $70 3WVelocTy StacKs $1795 43% Giles G 2O2 Designed nyTOC Pilot Wolfgang Matt W ngspan 14 length IC C 202 features Gel-coated Finerglass fuselage pretsilt w ngs 3WI2OiB2Fano stabs removable 96cc 729 in5Sleeves Wngtabe ano Staotsbe inscalled 847 lbs hp74L x 22WA emns e evator ano roder ready 3W-I40iB2-FI 550ninged 1376cc / 839 4' anding gear sJpport nstalled & Frewall 857 lbs bp74Lx l25W.nstalled 202 Kit 3W240 82 1w n 23 HP 3W sG 202 6 Ports gs per cylinder IS HP l with 3W 2OiB2IF $2295$2195Giles0 Quality repair service 3W factory trained technician 3W-60i 3W-701 3W-48 1B2 3W-78 B2 3W-I 20 iB2 3W-140 iB2 60 oo/36 in3 60 HP 528 lb 60L x 40W Prop 22 x 12 70 oc/42 in3 • 65 HP 528 lb 60L x 4OW Prop 22 x 12 48 ooI29 in3 50 HP 454 lb x O3W Prop 20 x 12 78 cc/465 in3 • 74 HP 65 lb 57L x II 0W Prop 24 x IC 1196 oc/729 in3 • 115 HP 847 lb 124W Prop 28 x 12 1376 oo/839 in3 135 HP 858 lb 69L x 30W Prop 30 x 12 Aircraft International Inc Phone 73276k0997 3W Sales & ServIce Center 8 Country Meadow Drive Colts Neck Nj 07722Fax 73276 8585 Visit website wwwaircraft-intlcom cali Grand Opening Specias 100 Model Aviation y3W Front Intake _Motors avs well Smoke Mufflers 3W Motors made 3W-Modeilmotoren .... ..ude electronic auto advance ignition $ 1350 24422t-P 26/s 29v27tW Prop 18x IC $ 479 $ 1950 $ 3195 $ 3295 $585 $675 $795 $1095 $1350 $1530 battery terminal voltage data automatically recorded computercontrolled data acquisition system numeric data 400 points individual curve imported spreadsheet program graphing Referring Graph its clear used pack displaying strange behavior right start charge pack initially displays rather high terminal voltage begins decline immediately sharp spikes result Astro 1 lOD Peak Charger stopping charge sensed declining terminal voltagejust like pack truly peaked battery clearly displays strange behavior nearly six minutes charge charger shut down six times during period time quickly reset keep going Finally battery terminal voltage settled normal-looking pattern time Obvious Graph new pack behaved normally throughout charge periodno false peaks Both packs finally peaked customary fashion around 25-26 minutes charger shut down should Graph Two compares discharge curves both packs following first charges Clearly new pack looks newit holds higher terminal voltage longer comparison well-used pack looks limp beginning around seven minutes flight used pack will yield diminishing flight performance faster new pack its still quite useful sport flying Graph Three combines first second charge-of-the-day data used pack spikey curve simply repeat Graph smooth curve same pack its second charge test session curves may look like different packs arent What difference bench flight makes Clearly sitting shelf day creates wild monster flight tames think suggestion never stop flying Graph Four just impacting Graph Three lookalike discharge curves correspond two wildly different charge curves Graph Three data Graph Four would never suspect adventure seen Graph Three have offer month intend pursue matter further hopefully have report later thinkand hope confirmthat first charge frustration may eliminated routine use slow charger between flying sessions See Large Pack Slow Charger MA July 97 meantime may cussing chargers false peaking maybe older pack blame charging road late-model Plymouth Voyager Readers have received referenced Slow Charger article rather well Im getting nice reports reader satisfaction requests variations such multiple outputs metering etc As saystay tuned Regarding ongoing speed control development Ive pursuing see November 1998 column ESC circuit function Ive included recently adjustable motor cutoff function distinguished BEC function Ive experimenting MCO see its beneficial motor packseven before got new pack/used pack behavior above Ive setting up some ESCs cut back motor drain pack approaches predetermined level Ive using 9 volts/cell starters Ive wondering packs better off long term instead being able severely depleted charge often happens end flight Now interest greater will take long time see MCC idea pays off Another stay tuned So ends first column New Year Please have happy safe holiday season great Electri-flyin New Year Please include SASE correspondence youd like reply 4Superior Balsa & Hobby Supply 700 AM 700 tp//pw2netcomcom/-balsalsupenorhtm baIsa@ixnetcomcom sr CA TIME 1 2020-G Centralia Hawaiian Gardens CA 90716 Monday Saturday se add sufficient amaunt excess refunded shipping UPS Parcel Post LL $285 handling 800 488-9525 $1500 Mm order accept Visa Mastercard Checks CA sales add 825% sales tax Info 562865-3220 FAX 562860-0327 Complete price list-SASE Shop hours 800AM 300PM Mon/Fri 5/98 BALSA Aircraft Sitka Spruce 3 x balsa price STICKSBass 2 balsa price 1/16 14CI43W481/4 RiCH3648 1/16o1/161011401142230 1/19o3/32101/403162733 1/16 1/610Ia11401122941 1/1603/16Il151/4o5/93750 1/160I/4/2151/403/44250 1/16r3/61319 1/1001/21721h/Ia61Ca..392L.A87 22265/1605/162730 5/16 03/03130 3i32EiCld381L.4875/160103646 3/320 3/3211125/1603/44662 3/3 3/3201/4141631603/63645 3/32o3/a15Ia3/6a1/240 97 3/2201/216 243/6o5/647 04 3/3203/426 323/803/453 66 i/WHCN-- 1ft--i6-4V 1/601/0 1/2 49 94 1/603/16 5/6 97 76 1/901/4 1/203/4 90 62 1/903/i 1/601/2 tt38aW 1/9o3/4 2636 5/605/6 60 66 5/aol 63 114 3/16 RiCH 3W68 3/16o3/16 Other Fine Products 3/16o 1/4 NHP Wesi Sysiems 3/1603/6 2126& Bob Sm/IS Epoxy 3/1601/2 s Supplies 3/1603/4 mposuts Hardware BALSA SHEETS 1/16012945 3/320131 42 1/6ol25 46 3/100 13659 1/4xl52 76 3/90167 66 1/20176104 3 INCH36 48 1/3702/90 1/16023650 3/32024861 1/9024695 3/16o280 74 1/4 o26690 3/9 0296 119 1/2 o2110 143 3 INCH3648 1/22024260 1/16034460 3/32025267 1/6 026364 3/160378103 1/4 0394130 9/1603106102 3/9 03115170 1/2 03150200 1/3204 84 92 1/16o466 92 3/320462114 1/6 0493134 3/1604109156 1/4 04102176 3/9 04210295 1/3 04295336 TRAILING EDGES 36LAr 3/1603/43547 1/4 013664 1/6 01/2 j2937 5/16011/44671 3/6011/20495 1/20290 3/403160 36 AILERONS 1/401 97 1/4011/4 95 1/4011/374 1/402it 90 5/160 /14II 74 5/1601-1/2It 75 9/16o2II69 3/60295 3/60 11/263 3/6o2-1/2136 1/2011/299 1/2 02 109 36 TRIANGLES 3/9o3/6 -7I 33 3/403/4 -0, 101 36 BIRCH DOWELS 1/9165/1627 311917 Q3/637 1/4201/254 36 LEADING EDGES Cor/velOonalSvIomleSlCal 1/403/6903/0031675 3/601/2691/201/2105 1003/41403/4o3/4100 3/401170101195 Ldg 6096 ReflecOve Tape 350 WiDE BALSA SHEETS h&Bafl3a41 1/19141225200315 302160247225345 1/9179279290390 3/16209314266440 1/4235360325530 3/6300477420695 1/2510595715990 BALSA BLOCKS 24303W 4W 101030tiS 1020601891902/5 103120235265320 100197325379420 202176245292336 2a3/66350423460 204269450536710 2o2230505706660 3044607109291235 40405000013501600 Aircraft Grade Birch P1 ood 6512 12012 12x24 12040 40040 1u94 ____ 310/5145295535 1035 3600 -3l/y951 190305670 2500 1/16 30/591015/22556702500 SPly14027552510203900 3/5ri/ari/a4259103200 Te 510/515029557511204000 3/18 4/7/ 992003476692600 -ii. O pty1252303807352950 3/s 150295550 1000 3900 1/2 910/5215375615 1200 4550 1/5 Lila P06/i951252404751750 1/4 Lit pop/ar 1 25 1 95 345 6752550 Trook CASBob Smith Flash Bargain Balsa Bundles362 95483 95 OBECHI 1/32o 12l1000 105' $65155p901i/y Thin1/2 oz2101 FOAM SHEETS 6/ae2o12o24 395 Oap or1023493001/3203/9/ 1/3204 /91/601/6/30//19/12/ 1001/2 /9/____ /30/I3/1603/l61/401/413/603/6 ISiok2 oz595500I/16o3 /91 1/16o4 /9/i/6o3/16 /32/ 3/i6o 1/4122/ 1/4o3/9 /15/ 3/6o 1/2 /10/ 1/2o3/4 /6oie 201202417560420240401326 inkS9 oz179516503/3203 /9/ 3/3204 51/60 1/4 /3O/3/I60316/20/ 1/401/2 /14/ 3/603/4 / 8/SOltie 2024049930EPO 2x 12o24550 ~ l8oz30001/9 03 /9 1/6 04 /4/1/603/6 /29/ 31190 1/2 /17 1/403/4 /10/ 200ihin9ap6log soeoooe5 50 3/16 x35/ 3/1604 /2/1/601/2 /20/ 3/16x3/4 /12/Limited availability -Cxli05ite4o 12024 350010102019046 1550 046161/2oz455 5aI ISo11/4 03 /4 1/4 04 13/1/803/4 /15///ElenotesquantitvperbuoodleSVNi4o24o46 1275 EPP2o36o45 3000 0ap 1 oz945665 3/9 03 /3 3/6 04 /2* Some sums woronholes & inularsfloor/c Foam CulOng Wire 9 feel $300 Thiok2 OZ149512001/2 03 /2 1/2 04 /2/" UPS ovesoze sh4pp/o charge 10/ 30 0/5 102 Model Aviation /rI densty 5460500 cal pnces Migrs & Ona/ars Send reseler program Poons suteo/ 10 oSonge
