FOLLOW UP September/October 1987 col umns offered information modify Astro Model 102 DC/DC Super Charger modified charger features current-regulated performance ie charge current set remains relatively constant over duration charge cycle modification also allows charger used connected automobile electrical system auto engine runningsomething possible degree safety other type charger otherwise Reader response offering has quite positive also quite inquisitive answers some popular questions No No No NOT recommend using Astro Super Charger connected automobile cigarette lighter socket fact recom mend using receptacle ordinary simple 6/7-cell chargers fact car cig arette lighter sockets mating accessory plugs often form very unreliable ohmic connec tion Ive seen situation times field frustrated modelers being able get reasonable flight because Poor-quality connections charger-to-autobattery trouble charger high-capability larger cell count Charg ing large packs means charger putting out lots power can tak ing lots power translates drawing lots current auto batteryjust exactly situation demands high-quality connec tionNOT wifty such lighter recepta cle likely provide Going beyond modified Super Charg er can MUCH MORE DEMANDING input-connection quality reason modified charger maintains relatively steady output charging current relatively independent input voltage does example automatically adjusting its input cur rent upward make up lowering input volt age total input power input voltage times input current divided efficiency equals output power motor battery voltage times charging current Similarly input current drops auto battery voltage risessuch engine running technically inclined charger input characterizationtaking current lower voltage vice versais nega tive resistance above should clear power ing modified charger through lossy ohmic connectionssuch lighter sockets often actually results charger drawing higher put current turn causes voltage drop poor contactwhich results larger current drawwhich turn causes voltage losswhich turnwell get idea Its great way pop fuses may recall modification article recommended substituting LARGE battery clips rather small ones come charger Now know fact rec ommendation held chose modification reference article also described use charger driving field amy ing ready fly trueI actually thisbut DONT use cigarette lighter connector Rather use additionally installed heavy wiring running directly auto battery terminals connectors rear car installa tion described March July 1985 is50 Model Aviation Rado Control Electncs Bob Kopski 25 West End Dr Lansdale PA 19446 Magnificent Ford Flivver Chris True Peekskill NY flown 87 KRC Electric Fly 45-in-span plastic model kit three-view scaled up 65-in span project Pattern-wind Astro 60 24 1200 mAh cells gives spectacular performance Power control Jomar Flying weight 8 lb Construction like giant rubber-power model lots Y4-in-sq stringers some balsa sheet Can anyone guess what Mystery Electric L April Fool info next month Dick Wetzel Bath PA scratch-built splendid Lockheed P-38 R Model yet completed shown Span 84 scaled up Guillow rubber kit Power will two Astro 25 Super Ferrites 281200 mAh cells customized Jomar SC-3 power control Model weighs 65 lb has 900-sq-in wing Keith Shaws latest 87 Electric Fly scaled prototype Waco Taperwing owned Bob Lyjak neighbor Keiths Keller 50/24 motor 16 1200 mAh cells powers 5-lb craft Wingspan 48 sues MA Serious Electric fliers may want consider such additional wiring Having used myself several years would now definitely look back July 85 column will find goody thats natural use Astro 102 Super Charger modified column described charge-splitter very simple device made up some wire charge connectors 35mm film canister used conjunction highcapability chargers charge bat tery pack time limitations its use packs must made up same size cells ie cells must same ampere-hour capacity total number cells must exceed capacity charger ie though cells same battery pack does matter individual packs different cell count charge-splitter shown made two packs idea can easily extended two packs device essentially con nects packs series Out models charger same current flows through cells Check out smaller packs its almost like having several chargers running same time Finally several readers have asked hi-b toggle switch pictured own modi fied Astro 102 charger labeled 1-14 10-22 article explained modifica tion effect used up about two cells worth charger output capability However model 102 specified having capability up 28 cells 28 minus two should 26 Yup Thats correct arithmetic reality however found could re liably charge 28 cells four-plus amps unmodified Super Charger actual up per cell-count limit highly dependent condition auto battery terminals some other things well So consistent nor mal conservative preference practice chose label switch cell counts reflect re ality operational limitations over wide range operating conditions think youll find ratings choices proper Keith Shaw name new column also often appears other columns well Keith may very well countrys plan cts best Electric modeler As such regu larly sought out othersI get reader requests address Well turns out Keith has just recently acquired new larger Continued page 145 911E BEST IN ELECTRIC FLIGHT SPECIALIZING IN ASTRO FLIGHT SYSTEMS TD i U 32]NH] E LF EI CI T0 RH IT CS Flight SsteHs 31 Perrj Street Niddleboro fIR 823463117 Phone 6179472885 C 9 PM Lets enjoy outdoorsin comfort Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats OuickTo St Up Change Instantly Give Protection FromThe Weather SIZE 72 X 120 60 sq ft P~ItF 35EAzE ss NING CANOPY 9vlO SPORTEING CANOPY 9olB rMnGv 0,lfl ALL OF THE NEW SIZES HAVE THE SAME FEATURES AS THE 6 xl 0 SPORTSMAN THE NEW Sx 10 ADD-A-SHADE KAY BE USED WITH.ALL OF OUR SHADE TENTS NEW SIZES AVAILASLE APRIL 1 lOSS TRAE-LOE-EYE-EI MAKES IT EASY TO USE YOUR PORTA-SHADE WITH ANY RIv THAT IS EQUIPPED WITH THE MOUNTED CANOPY TRACE YOUR R/V DEALER CAN SUPPLY THE TRACE IF YOU NEED ONE MECHANICS TOTETARP 4x 6 blue/White tGrp equipped handles rivited four corners can provide clean dry Surf ace field repairs can serve weather cover equipment against sun rein FREE LITERATURE IS AVAILABLE ON ALL FOUR N COMPANY PRODUCTS 4M Company 209 SW BuCy Avenue 4BartIeaviile OK 74003 Phone 918-336-9445 SCOPtS6o SoAsi PPR 4-6061I10$3SSS $300UPS 0010 NOASS PiN 4-606IcI0$3295V $300UPS Add-A-Shads Model APR 4-606II10$2995 $300UPS Neohamic Tots-TapO MT-lA4s6S 585 $150UPS R/V T6k-Lok-Ey6 Eli TAAZ51000 $150UPS Mamt6oC6rd--Vt.--IO0--Noy Opd6I-S--Cholu--06lsr IeqalrLs Evisd April 1988 51 FOUR CYCLE ACCESSORIES FOUR cycuFOUR CYCLE IN-COWL MUFFLERS ENGINE MOUNTSJT EAB ENTA AS AC UPOINV ENGINE..2000 JT-EAS ENYA AS AC UPIINVSIOE ENGINE2000 CASt AUGINMUM ALISJT-E65 ENYA 60-50 AC UPIINV ENGINE..2000 JT-ESS ENVA 60-SO AC UPIINVISIDE ENGINE 2700 SOCKS CAP nests cuog1758 ENVA 60-120 AC UPIINY ENGINE2700 47-ENS ENVA 60-120 AC UPIINVISIGE ENGINE 2700 DRILLED AND TAPPED PORIT-ERS ENVA 6 120 PC UP/INV ENGINE3000 UhISII0 P06 hAD600IT-ENS ENYA N 120 PC UPIINVISIDEENG.3000 HP vi iiicocIT-ASS II VT 46 UPIINV ENGINE2000 ENVA 35 AC AC1000iT-AGO lIP VT AS UPINVISIDE ENGINE2000 SAITO PA 301000JTNAS MAX PS AG UPINV ENGINE. 2000 Os MAX 40 PC1000iT-NAG MAX PS AG UP/INWSIOE ENGINE.0000 iT-GIG MAX PS 61 UPINV ENGINE 2000 05 MAX AOS1000 OS MAX ASS1000iT-SIS NAX PS SI UPIINVISIDE ENGINE..2000 SAITO PA AC AS1000i-GS MAO PS 60 UPIINV ENGINE2700 ENYA AS AC1000iT-NOS NAX PS 60 UP/INVISIDE ENGINE2700 WCSRA TA AC1000JT-M25 MAX PS 120 UP/INV ENGINE2700 lAP VT AG1200JT-M2S MAX P5120 UP/INV/SIOE ENGINE2700 UN0III6S P05 50 901100iT-NAB SAITO PA AS UP/INY ENGINE2000 OS MAX PS 61 1500 -iT-SAS SAITO PA 40 UPIINV/SIOE ENGINE2000 OS MAX PiT 565 SAITO PA 60 UP/INV ENGINE2000 ENYA 6060 60120ACI300iT-SOS SAITO PA 65 UP/INV/SIOE ENGINE2000 UIIGIIIIUSO 006 12016001028 SAITO PA 120 UP/ING ENGINE2700 OS MAX PS ISO1600 ENTA 6120 NC2000iT SOS SATTO PA 120 UPIINVIGIDE ENGINE 2700 OS MAX 12051600$J-IPOWER STICK SAITO PA 120 1600 SUPER TISRE 25001600 ENGINE TEST STANDS9ss CAST ALUMINUMa asos.at-ow-as atlI6n inch REGUlAR 1/ZA 60 $1150 GIANT I/lA TO 22 52500 ovci hobby shop OROtS DiftSCT Worledale SIm6flt CIUdL MO Vlscs MC COO accepted Add 5250 LP 5200 C00 arId 6 FREE CATALOG AT COSITERT OR FLYING FIELD couple months ago column devot ed interrelationship between Giant Scale models personal computers week af ter Id mailed manuscript off Reston VA old friend Col Art Johnson published column same subject RCM Although concern has CADS Computer Aided Design Systemsor mechani cal drawing computer Ive reminded host computer programs appli cable radio-controlled model aircraft dont draw single line Computer software has developed does everything telling prop hang front Zenoah calculating performance quarter-scale B-25 many modeler/computer experts programming like mad Inevitably someone collecting programs publication Curtis Givens has approached ViP Publishers company Yours Truly Dick Phillips have established have computer program youd like have included Curts book drop him note 5304 W Riverview Dayton OH 45406 course no bucks involvedonly prestige having name program pub lished printed booka free copy will receive uses program its pages Some bits pieces old workbench After youve fitted wheels axles trimmed axles flush outside edge wheel collars break Out solder ing iron/torch Remove wheel collars solder bit tin-can metal covers end collars brass take solder well Trim outside tin bits youll have what looks like scale hub cap better mechanical viewpoint tin cover keeps jamming wheel collars too far onto axleand binding normal free running wheels Malting plywood out plywood may sound kind dorky thats sure havent tried wont know strong What Im suggesting course use thin plywood go laminating curved parts next Giant Laminating strips wood around form way produce lightest strong est wing tips tail feather outlines possible Next time get lamination use Ms-in ply wood strips instead balsa Big Bird Unless curves extreme theres no need soak plywood hot water theres advantage using plywood over balsayou can cut longer strips 48-in sheet can softer wood event use relatively slow-drying white aliphatic resin glue laminating plywood strips applying spreading glue try keep having glue voids wrap ply lamination tightly around pack Give whole stack week dry thoroughly sand laminated part final size Im sure youll very impressed strength stability construction responding advertisers mention read about Model Aviation Electric model-building facility moved out apartment house now has space promising some unbelievably large Electrics Keith tells hes got biggie boards right nowso watch out 1988 Electric Fly goers Keith did send along new address asked include Keith Shaw 2756 Elmwood Ann Arbor MI 48104-6624 Part recent conversation Keith led some reflections 1987 Electric Fly Cover age meet appeared January 1988 sue MA included statements about increased use higher-power systems corresponding increased performance both pi lots planes Some months photos show what mean As generalization faster dramatic flight performances also shorter flight per formances because associated high power lev els drain battery faster Keith well-known sizzling aerobatic flight performances among other things spoke flight intensity sorts sheer thrill such highest levels performance de manding engrossing pilot doesnt feel flight short fact may feel flight long Hummm think what may have new Law Pro fessor Keith Ill dare dub Keiths First Law Fun Faster seems longer youre holding stick Well can tell firsthand youre holding stick GS 02GS 03 2656346 GRATE-SHAPESTM SANDING BLOCKS Long lasting silicon carbide grit sides 10 Long GS 101 1/4 & 3/6 Combo package #1-GS 101 102 103 $1195 S&HSAVE Six Pack Combo- GSa above $2195 S&H Single GS $495 S&H AZ RESIDENTS ADD 55k TAX products guaranteed ers invited Ask hobby dealer tlrat SEND CHECK OR*\XMASTER CHARGE MONEY ORDER TOOR VISA ACCEPTED Bell Rock Industries6466 Hwy 179-Suite 108 Sdona AZ 66336 1602 2841806 GRATE-SHAPESTM ROUNDS GS 200 PKG 9 long$795 S&H GS 104GS 105GS 106 318 & 518 900 Vs w1518 450 6900 Combo package #2-GS 104 105 106 $1195 S&H GRATE-S HAPESTM SQUARES GS 300 PKG 9 long$495 S&H April 1988 145 RC Giant Scale/de VriesRC Electrics/Kopski Continued page 49Continued page 51 otherwise witnessing kinds flights same law holds true Beyond just beginning Over years mail Ive received has readers want get started Electric majority modelers want economically other extreme can recall perhaps two three letters topic interest FAI Electric event As result dominant reader interest have over years devoted much column space addressing beginner Now Id like move up bit address next pop ular question What next quite honestly what Im about get con tinue next month would serve perfectly well just beginners toodepending intent interest resources thinks safe say popular Electric power systems using up sev en cells six seven cells topping pop ularity charts easy understand cause so-called 05 Yuk hate kind nomenclature motors available ranging economy can types very impressive cobalts also low-cost chargers available associated batteries techni cally quite easy charge such packs dinary auto battery going 05 route just seems like natural approach firsttime Electric getting under seven-cell ceiling easy understandable also rather con fining place Going beyond seven cells op ens up whole new world practical power levelsand plane/performance combinations readily attainable smaller packs folks have enjoyed saturation first 05 systems begin asking What next imme diately focus chargers thats what next begins Generally first questions back quiring folks have own feelings outlook toward future Electric modeling lives person feels Electric will always play partand especially its partI immediately give strong encouragement getting high-capability charger Buying charger capable charging seven cells immediately puts faceto-face investment thats beyond $100 some very serious matter way see burning up about eight 10 gal lons glow glop about same cost hav ing nothing show except greasy clothes its gone falr complete must also say charging larger packs large investment entirely possible simply breaks up larger battery smaller packs cells can individually charged economy charger practice best done having smaller packs fitted connectors plug both charger wiring harness model latter harness configured individual packs connected series appear motor single battery cells has offered commercially Astro example 12-cell battery 15 made up two six-packs technically doable disconnect ing/connecting operation messy royale payne quickly tires An intermediate-cost-level approach con struct simple high-capacity charger such presented columns May June 1985 issues easily made charging sys tem based standard six- seven-cell econ omy charger some readily available parts 146 Model Aviation supplies can charge 18 cells time no disconnecting/connect ing encourage larger-system tentions find back issues see what Im talking about slickest approach remains commercially made high-capability chargers Among Robbe Automax Astro Model 102 popular recent KRC Electric Fly As soon has own approach dealing above-seven-cell charging challenge squared away next step decide what bigger power system consider sense just tough problem now charging limitations Out picture varied larger-system choices lie out tempt tease Choosing wisely automatically requires have some idea about what youd like fly course just much additional money wish invest Personally very much like 15-size motors have six geared find very versatile have seen flown seven 14 cellswith prop er plane/prop choices courseand perhaps best next cost-step beyond 05 category course also fly 25s 40s Like said ole new world uture columns See also MA April 1985 Electric competition rules new 1 988-89 AMA Competition Regulations Book out available AMA sending little card came packaged renewed AMA license can get just sending letter also Anyway book unique first time Regulations book contains AMA Electric rules bona fide unified format way back book theless can tell lots folks worked very hard sometimes emotionally establish very first rules know parts satisfactory personsincluding myself thats life know no knows thing until see Almighty participating flight line Im perfectly content intend supportive what have work now Im encouraging everyone like wise view first-time Electric rules what workable start put use local areas experience results drop line tell reactlon Ill maintain informal compilation inputs couple years its time review/revise AMA rules again Ill publish summary inputs above operative word USE ones have never forgetting before just beginning Silentiusmore December 1987 column briefly discussed local modelers grand suc cess Hobby Lobby/Graupner-powered Silentius Since Ive enjoyed friendly let ter Jim Martin HL Jim tells has opportunity fly Mr G friends noted doing much better finding staying weak thermals Jim noticed others flying split sticks rudder stick elevator other general werent touch ing elevator stlck Jim went say forced himself resist temptation wiggle own elevator stick presto model did much better its own Well Im familiar feeling Im hoping sharing offer ing will get longer flights too Continued page 152 RC Electrics/Kopski Continued page 146 Thanks Jim input insight Incidentally local modeler just complet ing HL Electric Pronto should have some inputs future columns Electric supplies continue available CS Flight Systems recent conversation owner/Electric modeler Charles Sylvia learned continuing expansion catalog updates latest discounted Electric supplies send two bucks Charlie CS Flight Systems 31 Perry St Box 775 Middleboro MA 02346 Tell em Bob sent ya must close another column singular frustration writing column low ceiling column size have far share can get print month Please forward comment question SASE please address listed very top column FLASH Just announceda new Electric kit Guillow Its Aeronca designed Woody Blanchard Woody chaired committee re sponsible first-ever AMA Electric rules discussed above 530-sq-in 67-in-span kit OSs should available about time read RC Old-Timers/Mathews Continued page 53 events has obviously worked Out well since own local SAM chapter has several flying Eut has now developed obscureand certainly structurally complexflying wing named simply Gross Wing after its designer Things get bit odd photo ap pears January 1942 Air Trails con struction article published until January 1948 postwar article design al tered include fuselage-mounted rudder ever Bernard Gross states 1948 Air Trails article original 1941 wing used basis Eut has utilized 1942 pho fuselage rudder planform has com bined airfoils outline 1948 version Whether design has au thenticated know time writing Longtime friend Bill Baker has taken over Free Flight Old-Timers column magazine challenged explain new SAM rules RC No way Baker figure will least year before jail-house lawyers have worked way through contradictions What will use Eut Tilestons latest project point Out some major changes SAM rules refer modelers really interested new SAM rule book Eut has scaled Gross Flying Wing up 675 sq wing area meet SAMs 225-sq-inper- 10-cu-in-of-displacement rule makes legal 30 cu two-cycle power plant Eut used Enya 46 four-stroke un der old rules classified according 60% its displacement 60% 46 cu However under new rules model now illegal since four-cycle engines classified ac cording full displacements As built Euts Gross Wing spans 84 152 Model Aviation FIBERGLASS PARTS WET Y SAFE OXY unique two-component epoxy laminating system developed offer user safest highest quality laminating resin available VA Pt Kit-S140O 1V2 Qt Kit-$210O Glass Cloth 58 oz/sq yd 38x6ft-$90038xl5ft-S190O 38 x30 ft $3500 add $250 Ship 8 Hand above items Send SASE additional information ACPs Ughtweight Composite Materials Order COD Send Check Money Order AEROSPACE COMPOSITE PRODUCTS P0 Box 16621 IDept Al Irvine CA 92714 Source Lightweight Materials Over 237 Cowls kit scratch built models Also over 34 round cowls ranging 4 14-7/8 diameter 55 diff size 8 shape wheel pants custom Make Parts Vacuum Form Canopies P1gm wud $1 couplet kt T&D FIBERGLASS SPECIALTIES 30925 Block Dept 4 Garden City Ml 48135 PHONE 1313421-6358 BRAZED & HEAT-TREATED WIRE GEARS & CASANES PHONE 3131 261-9064
Edition: Model Aviation - 1988/04
Page Numbers: 50, 51, 145, 146, 152
FOLLOW UP September/October 1987 col umns offered information modify Astro Model 102 DC/DC Super Charger modified charger features current-regulated performance ie charge current set remains relatively constant over duration charge cycle modification also allows charger used connected automobile electrical system auto engine runningsomething possible degree safety other type charger otherwise Reader response offering has quite positive also quite inquisitive answers some popular questions No No No NOT recommend using Astro Super Charger connected automobile cigarette lighter socket fact recom mend using receptacle ordinary simple 6/7-cell chargers fact car cig arette lighter sockets mating accessory plugs often form very unreliable ohmic connec tion Ive seen situation times field frustrated modelers being able get reasonable flight because Poor-quality connections charger-to-autobattery trouble charger high-capability larger cell count Charg ing large packs means charger putting out lots power can tak ing lots power translates drawing lots current auto batteryjust exactly situation demands high-quality connec tionNOT wifty such lighter recepta cle likely provide Going beyond modified Super Charg er can MUCH MORE DEMANDING input-connection quality reason modified charger maintains relatively steady output charging current relatively independent input voltage does example automatically adjusting its input cur rent upward make up lowering input volt age total input power input voltage times input current divided efficiency equals output power motor battery voltage times charging current Similarly input current drops auto battery voltage risessuch engine running technically inclined charger input characterizationtaking current lower voltage vice versais nega tive resistance above should clear power ing modified charger through lossy ohmic connectionssuch lighter sockets often actually results charger drawing higher put current turn causes voltage drop poor contactwhich results larger current drawwhich turn causes voltage losswhich turnwell get idea Its great way pop fuses may recall modification article recommended substituting LARGE battery clips rather small ones come charger Now know fact rec ommendation held chose modification reference article also described use charger driving field amy ing ready fly trueI actually thisbut DONT use cigarette lighter connector Rather use additionally installed heavy wiring running directly auto battery terminals connectors rear car installa tion described March July 1985 is50 Model Aviation Rado Control Electncs Bob Kopski 25 West End Dr Lansdale PA 19446 Magnificent Ford Flivver Chris True Peekskill NY flown 87 KRC Electric Fly 45-in-span plastic model kit three-view scaled up 65-in span project Pattern-wind Astro 60 24 1200 mAh cells gives spectacular performance Power control Jomar Flying weight 8 lb Construction like giant rubber-power model lots Y4-in-sq stringers some balsa sheet Can anyone guess what Mystery Electric L April Fool info next month Dick Wetzel Bath PA scratch-built splendid Lockheed P-38 R Model yet completed shown Span 84 scaled up Guillow rubber kit Power will two Astro 25 Super Ferrites 281200 mAh cells customized Jomar SC-3 power control Model weighs 65 lb has 900-sq-in wing Keith Shaws latest 87 Electric Fly scaled prototype Waco Taperwing owned Bob Lyjak neighbor Keiths Keller 50/24 motor 16 1200 mAh cells powers 5-lb craft Wingspan 48 sues MA Serious Electric fliers may want consider such additional wiring Having used myself several years would now definitely look back July 85 column will find goody thats natural use Astro 102 Super Charger modified column described charge-splitter very simple device made up some wire charge connectors 35mm film canister used conjunction highcapability chargers charge bat tery pack time limitations its use packs must made up same size cells ie cells must same ampere-hour capacity total number cells must exceed capacity charger ie though cells same battery pack does matter individual packs different cell count charge-splitter shown made two packs idea can easily extended two packs device essentially con nects packs series Out models charger same current flows through cells Check out smaller packs its almost like having several chargers running same time Finally several readers have asked hi-b toggle switch pictured own modi fied Astro 102 charger labeled 1-14 10-22 article explained modifica tion effect used up about two cells worth charger output capability However model 102 specified having capability up 28 cells 28 minus two should 26 Yup Thats correct arithmetic reality however found could re liably charge 28 cells four-plus amps unmodified Super Charger actual up per cell-count limit highly dependent condition auto battery terminals some other things well So consistent nor mal conservative preference practice chose label switch cell counts reflect re ality operational limitations over wide range operating conditions think youll find ratings choices proper Keith Shaw name new column also often appears other columns well Keith may very well countrys plan cts best Electric modeler As such regu larly sought out othersI get reader requests address Well turns out Keith has just recently acquired new larger Continued page 145 911E BEST IN ELECTRIC FLIGHT SPECIALIZING IN ASTRO FLIGHT SYSTEMS TD i U 32]NH] E LF EI CI T0 RH IT CS Flight SsteHs 31 Perrj Street Niddleboro fIR 823463117 Phone 6179472885 C 9 PM Lets enjoy outdoorsin comfort Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats OuickTo St Up Change Instantly Give Protection FromThe Weather SIZE 72 X 120 60 sq ft P~ItF 35EAzE ss NING CANOPY 9vlO SPORTEING CANOPY 9olB rMnGv 0,lfl ALL OF THE NEW SIZES HAVE THE SAME FEATURES AS THE 6 xl 0 SPORTSMAN THE NEW Sx 10 ADD-A-SHADE KAY BE USED WITH.ALL OF OUR SHADE TENTS NEW SIZES AVAILASLE APRIL 1 lOSS TRAE-LOE-EYE-EI MAKES IT EASY TO USE YOUR PORTA-SHADE WITH ANY RIv THAT IS EQUIPPED WITH THE MOUNTED CANOPY TRACE YOUR R/V DEALER CAN SUPPLY THE TRACE IF YOU NEED ONE MECHANICS TOTETARP 4x 6 blue/White tGrp equipped handles rivited four corners can provide clean dry Surf ace field repairs can serve weather cover equipment against sun rein FREE LITERATURE IS AVAILABLE ON ALL FOUR N COMPANY PRODUCTS 4M Company 209 SW BuCy Avenue 4BartIeaviile OK 74003 Phone 918-336-9445 SCOPtS6o SoAsi PPR 4-6061I10$3SSS $300UPS 0010 NOASS PiN 4-606IcI0$3295V $300UPS Add-A-Shads Model APR 4-606II10$2995 $300UPS Neohamic Tots-TapO MT-lA4s6S 585 $150UPS R/V T6k-Lok-Ey6 Eli TAAZ51000 $150UPS Mamt6oC6rd--Vt.--IO0--Noy Opd6I-S--Cholu--06lsr IeqalrLs Evisd April 1988 51 FOUR CYCLE ACCESSORIES FOUR cycuFOUR CYCLE IN-COWL MUFFLERS ENGINE MOUNTSJT EAB ENTA AS AC UPOINV ENGINE..2000 JT-EAS ENYA AS AC UPIINVSIOE ENGINE2000 CASt AUGINMUM ALISJT-E65 ENYA 60-50 AC UPIINV ENGINE..2000 JT-ESS ENVA 60-SO AC UPIINVISIDE ENGINE 2700 SOCKS CAP nests cuog1758 ENVA 60-120 AC UPIINY ENGINE2700 47-ENS ENVA 60-120 AC UPIINVISIGE ENGINE 2700 DRILLED AND TAPPED PORIT-ERS ENVA 6 120 PC UP/INV ENGINE3000 UhISII0 P06 hAD600IT-ENS ENYA N 120 PC UPIINVISIDEENG.3000 HP vi iiicocIT-ASS II VT 46 UPIINV ENGINE2000 ENVA 35 AC AC1000iT-AGO lIP VT AS UPINVISIDE ENGINE2000 SAITO PA 301000JTNAS MAX PS AG UPINV ENGINE. 2000 Os MAX 40 PC1000iT-NAG MAX PS AG UP/INWSIOE ENGINE.0000 iT-GIG MAX PS 61 UPINV ENGINE 2000 05 MAX AOS1000 OS MAX ASS1000iT-SIS NAX PS SI UPIINVISIDE ENGINE..2000 SAITO PA AC AS1000i-GS MAO PS 60 UPIINV ENGINE2700 ENYA AS AC1000iT-NOS NAX PS 60 UP/INVISIDE ENGINE2700 WCSRA TA AC1000JT-M25 MAX PS 120 UP/INV ENGINE2700 lAP VT AG1200JT-M2S MAX P5120 UP/INV/SIOE ENGINE2700 UN0III6S P05 50 901100iT-NAB SAITO PA AS UP/INY ENGINE2000 OS MAX PS 61 1500 -iT-SAS SAITO PA 40 UPIINV/SIOE ENGINE2000 OS MAX PiT 565 SAITO PA 60 UP/INV ENGINE2000 ENYA 6060 60120ACI300iT-SOS SAITO PA 65 UP/INV/SIOE ENGINE2000 UIIGIIIIUSO 006 12016001028 SAITO PA 120 UP/ING ENGINE2700 OS MAX PS ISO1600 ENTA 6120 NC2000iT SOS SATTO PA 120 UPIINVIGIDE ENGINE 2700 OS MAX 12051600$J-IPOWER STICK SAITO PA 120 1600 SUPER TISRE 25001600 ENGINE TEST STANDS9ss CAST ALUMINUMa asos.at-ow-as atlI6n inch REGUlAR 1/ZA 60 $1150 GIANT I/lA TO 22 52500 ovci hobby shop OROtS DiftSCT Worledale SIm6flt CIUdL MO Vlscs MC COO accepted Add 5250 LP 5200 C00 arId 6 FREE CATALOG AT COSITERT OR FLYING FIELD couple months ago column devot ed interrelationship between Giant Scale models personal computers week af ter Id mailed manuscript off Reston VA old friend Col Art Johnson published column same subject RCM Although concern has CADS Computer Aided Design Systemsor mechani cal drawing computer Ive reminded host computer programs appli cable radio-controlled model aircraft dont draw single line Computer software has developed does everything telling prop hang front Zenoah calculating performance quarter-scale B-25 many modeler/computer experts programming like mad Inevitably someone collecting programs publication Curtis Givens has approached ViP Publishers company Yours Truly Dick Phillips have established have computer program youd like have included Curts book drop him note 5304 W Riverview Dayton OH 45406 course no bucks involvedonly prestige having name program pub lished printed booka free copy will receive uses program its pages Some bits pieces old workbench After youve fitted wheels axles trimmed axles flush outside edge wheel collars break Out solder ing iron/torch Remove wheel collars solder bit tin-can metal covers end collars brass take solder well Trim outside tin bits youll have what looks like scale hub cap better mechanical viewpoint tin cover keeps jamming wheel collars too far onto axleand binding normal free running wheels Malting plywood out plywood may sound kind dorky thats sure havent tried wont know strong What Im suggesting course use thin plywood go laminating curved parts next Giant Laminating strips wood around form way produce lightest strong est wing tips tail feather outlines possible Next time get lamination use Ms-in ply wood strips instead balsa Big Bird Unless curves extreme theres no need soak plywood hot water theres advantage using plywood over balsayou can cut longer strips 48-in sheet can softer wood event use relatively slow-drying white aliphatic resin glue laminating plywood strips applying spreading glue try keep having glue voids wrap ply lamination tightly around pack Give whole stack week dry thoroughly sand laminated part final size Im sure youll very impressed strength stability construction responding advertisers mention read about Model Aviation Electric model-building facility moved out apartment house now has space promising some unbelievably large Electrics Keith tells hes got biggie boards right nowso watch out 1988 Electric Fly goers Keith did send along new address asked include Keith Shaw 2756 Elmwood Ann Arbor MI 48104-6624 Part recent conversation Keith led some reflections 1987 Electric Fly Cover age meet appeared January 1988 sue MA included statements about increased use higher-power systems corresponding increased performance both pi lots planes Some months photos show what mean As generalization faster dramatic flight performances also shorter flight per formances because associated high power lev els drain battery faster Keith well-known sizzling aerobatic flight performances among other things spoke flight intensity sorts sheer thrill such highest levels performance de manding engrossing pilot doesnt feel flight short fact may feel flight long Hummm think what may have new Law Pro fessor Keith Ill dare dub Keiths First Law Fun Faster seems longer youre holding stick Well can tell firsthand youre holding stick GS 02GS 03 2656346 GRATE-SHAPESTM SANDING BLOCKS Long lasting silicon carbide grit sides 10 Long GS 101 1/4 & 3/6 Combo package #1-GS 101 102 103 $1195 S&HSAVE Six Pack Combo- GSa above $2195 S&H Single GS $495 S&H AZ RESIDENTS ADD 55k TAX products guaranteed ers invited Ask hobby dealer tlrat SEND CHECK OR*\XMASTER CHARGE MONEY ORDER TOOR VISA ACCEPTED Bell Rock Industries6466 Hwy 179-Suite 108 Sdona AZ 66336 1602 2841806 GRATE-SHAPESTM ROUNDS GS 200 PKG 9 long$795 S&H GS 104GS 105GS 106 318 & 518 900 Vs w1518 450 6900 Combo package #2-GS 104 105 106 $1195 S&H GRATE-S HAPESTM SQUARES GS 300 PKG 9 long$495 S&H April 1988 145 RC Giant Scale/de VriesRC Electrics/Kopski Continued page 49Continued page 51 otherwise witnessing kinds flights same law holds true Beyond just beginning Over years mail Ive received has readers want get started Electric majority modelers want economically other extreme can recall perhaps two three letters topic interest FAI Electric event As result dominant reader interest have over years devoted much column space addressing beginner Now Id like move up bit address next pop ular question What next quite honestly what Im about get con tinue next month would serve perfectly well just beginners toodepending intent interest resources thinks safe say popular Electric power systems using up sev en cells six seven cells topping pop ularity charts easy understand cause so-called 05 Yuk hate kind nomenclature motors available ranging economy can types very impressive cobalts also low-cost chargers available associated batteries techni cally quite easy charge such packs dinary auto battery going 05 route just seems like natural approach firsttime Electric getting under seven-cell ceiling easy understandable also rather con fining place Going beyond seven cells op ens up whole new world practical power levelsand plane/performance combinations readily attainable smaller packs folks have enjoyed saturation first 05 systems begin asking What next imme diately focus chargers thats what next begins Generally first questions back quiring folks have own feelings outlook toward future Electric modeling lives person feels Electric will always play partand especially its partI immediately give strong encouragement getting high-capability charger Buying charger capable charging seven cells immediately puts faceto-face investment thats beyond $100 some very serious matter way see burning up about eight 10 gal lons glow glop about same cost hav ing nothing show except greasy clothes its gone falr complete must also say charging larger packs large investment entirely possible simply breaks up larger battery smaller packs cells can individually charged economy charger practice best done having smaller packs fitted connectors plug both charger wiring harness model latter harness configured individual packs connected series appear motor single battery cells has offered commercially Astro example 12-cell battery 15 made up two six-packs technically doable disconnect ing/connecting operation messy royale payne quickly tires An intermediate-cost-level approach con struct simple high-capacity charger such presented columns May June 1985 issues easily made charging sys tem based standard six- seven-cell econ omy charger some readily available parts 146 Model Aviation supplies can charge 18 cells time no disconnecting/connect ing encourage larger-system tentions find back issues see what Im talking about slickest approach remains commercially made high-capability chargers Among Robbe Automax Astro Model 102 popular recent KRC Electric Fly As soon has own approach dealing above-seven-cell charging challenge squared away next step decide what bigger power system consider sense just tough problem now charging limitations Out picture varied larger-system choices lie out tempt tease Choosing wisely automatically requires have some idea about what youd like fly course just much additional money wish invest Personally very much like 15-size motors have six geared find very versatile have seen flown seven 14 cellswith prop er plane/prop choices courseand perhaps best next cost-step beyond 05 category course also fly 25s 40s Like said ole new world uture columns See also MA April 1985 Electric competition rules new 1 988-89 AMA Competition Regulations Book out available AMA sending little card came packaged renewed AMA license can get just sending letter also Anyway book unique first time Regulations book contains AMA Electric rules bona fide unified format way back book theless can tell lots folks worked very hard sometimes emotionally establish very first rules know parts satisfactory personsincluding myself thats life know no knows thing until see Almighty participating flight line Im perfectly content intend supportive what have work now Im encouraging everyone like wise view first-time Electric rules what workable start put use local areas experience results drop line tell reactlon Ill maintain informal compilation inputs couple years its time review/revise AMA rules again Ill publish summary inputs above operative word USE ones have never forgetting before just beginning Silentiusmore December 1987 column briefly discussed local modelers grand suc cess Hobby Lobby/Graupner-powered Silentius Since Ive enjoyed friendly let ter Jim Martin HL Jim tells has opportunity fly Mr G friends noted doing much better finding staying weak thermals Jim noticed others flying split sticks rudder stick elevator other general werent touch ing elevator stlck Jim went say forced himself resist temptation wiggle own elevator stick presto model did much better its own Well Im familiar feeling Im hoping sharing offer ing will get longer flights too Continued page 152 RC Electrics/Kopski Continued page 146 Thanks Jim input insight Incidentally local modeler just complet ing HL Electric Pronto should have some inputs future columns Electric supplies continue available CS Flight Systems recent conversation owner/Electric modeler Charles Sylvia learned continuing expansion catalog updates latest discounted Electric supplies send two bucks Charlie CS Flight Systems 31 Perry St Box 775 Middleboro MA 02346 Tell em Bob sent ya must close another column singular frustration writing column low ceiling column size have far share can get print month Please forward comment question SASE please address listed very top column FLASH Just announceda new Electric kit Guillow Its Aeronca designed Woody Blanchard Woody chaired committee re sponsible first-ever AMA Electric rules discussed above 530-sq-in 67-in-span kit OSs should available about time read RC Old-Timers/Mathews Continued page 53 events has obviously worked Out well since own local SAM chapter has several flying Eut has now developed obscureand certainly structurally complexflying wing named simply Gross Wing after its designer Things get bit odd photo ap pears January 1942 Air Trails con struction article published until January 1948 postwar article design al tered include fuselage-mounted rudder ever Bernard Gross states 1948 Air Trails article original 1941 wing used basis Eut has utilized 1942 pho fuselage rudder planform has com bined airfoils outline 1948 version Whether design has au thenticated know time writing Longtime friend Bill Baker has taken over Free Flight Old-Timers column magazine challenged explain new SAM rules RC No way Baker figure will least year before jail-house lawyers have worked way through contradictions What will use Eut Tilestons latest project point Out some major changes SAM rules refer modelers really interested new SAM rule book Eut has scaled Gross Flying Wing up 675 sq wing area meet SAMs 225-sq-inper- 10-cu-in-of-displacement rule makes legal 30 cu two-cycle power plant Eut used Enya 46 four-stroke un der old rules classified according 60% its displacement 60% 46 cu However under new rules model now illegal since four-cycle engines classified ac cording full displacements As built Euts Gross Wing spans 84 152 Model Aviation FIBERGLASS PARTS WET Y SAFE OXY unique two-component epoxy laminating system developed offer user safest highest quality laminating resin available VA Pt Kit-S140O 1V2 Qt Kit-$210O Glass Cloth 58 oz/sq yd 38x6ft-$90038xl5ft-S190O 38 x30 ft $3500 add $250 Ship 8 Hand above items Send SASE additional information ACPs Ughtweight Composite Materials Order COD Send Check Money Order AEROSPACE COMPOSITE PRODUCTS P0 Box 16621 IDept Al Irvine CA 92714 Source Lightweight Materials Over 237 Cowls kit scratch built models Also over 34 round cowls ranging 4 14-7/8 diameter 55 diff size 8 shape wheel pants custom Make Parts Vacuum Form Canopies P1gm wud $1 couplet kt T&D FIBERGLASS SPECIALTIES 30925 Block Dept 4 Garden City Ml 48135 PHONE 1313421-6358 BRAZED & HEAT-TREATED WIRE GEARS & CASANES PHONE 3131 261-9064
Edition: Model Aviation - 1988/04
Page Numbers: 50, 51, 145, 146, 152
FOLLOW UP September/October 1987 col umns offered information modify Astro Model 102 DC/DC Super Charger modified charger features current-regulated performance ie charge current set remains relatively constant over duration charge cycle modification also allows charger used connected automobile electrical system auto engine runningsomething possible degree safety other type charger otherwise Reader response offering has quite positive also quite inquisitive answers some popular questions No No No NOT recommend using Astro Super Charger connected automobile cigarette lighter socket fact recom mend using receptacle ordinary simple 6/7-cell chargers fact car cig arette lighter sockets mating accessory plugs often form very unreliable ohmic connec tion Ive seen situation times field frustrated modelers being able get reasonable flight because Poor-quality connections charger-to-autobattery trouble charger high-capability larger cell count Charg ing large packs means charger putting out lots power can tak ing lots power translates drawing lots current auto batteryjust exactly situation demands high-quality connec tionNOT wifty such lighter recepta cle likely provide Going beyond modified Super Charg er can MUCH MORE DEMANDING input-connection quality reason modified charger maintains relatively steady output charging current relatively independent input voltage does example automatically adjusting its input cur rent upward make up lowering input volt age total input power input voltage times input current divided efficiency equals output power motor battery voltage times charging current Similarly input current drops auto battery voltage risessuch engine running technically inclined charger input characterizationtaking current lower voltage vice versais nega tive resistance above should clear power ing modified charger through lossy ohmic connectionssuch lighter sockets often actually results charger drawing higher put current turn causes voltage drop poor contactwhich results larger current drawwhich turn causes voltage losswhich turnwell get idea Its great way pop fuses may recall modification article recommended substituting LARGE battery clips rather small ones come charger Now know fact rec ommendation held chose modification reference article also described use charger driving field amy ing ready fly trueI actually thisbut DONT use cigarette lighter connector Rather use additionally installed heavy wiring running directly auto battery terminals connectors rear car installa tion described March July 1985 is50 Model Aviation Rado Control Electncs Bob Kopski 25 West End Dr Lansdale PA 19446 Magnificent Ford Flivver Chris True Peekskill NY flown 87 KRC Electric Fly 45-in-span plastic model kit three-view scaled up 65-in span project Pattern-wind Astro 60 24 1200 mAh cells gives spectacular performance Power control Jomar Flying weight 8 lb Construction like giant rubber-power model lots Y4-in-sq stringers some balsa sheet Can anyone guess what Mystery Electric L April Fool info next month Dick Wetzel Bath PA scratch-built splendid Lockheed P-38 R Model yet completed shown Span 84 scaled up Guillow rubber kit Power will two Astro 25 Super Ferrites 281200 mAh cells customized Jomar SC-3 power control Model weighs 65 lb has 900-sq-in wing Keith Shaws latest 87 Electric Fly scaled prototype Waco Taperwing owned Bob Lyjak neighbor Keiths Keller 50/24 motor 16 1200 mAh cells powers 5-lb craft Wingspan 48 sues MA Serious Electric fliers may want consider such additional wiring Having used myself several years would now definitely look back July 85 column will find goody thats natural use Astro 102 Super Charger modified column described charge-splitter very simple device made up some wire charge connectors 35mm film canister used conjunction highcapability chargers charge bat tery pack time limitations its use packs must made up same size cells ie cells must same ampere-hour capacity total number cells must exceed capacity charger ie though cells same battery pack does matter individual packs different cell count charge-splitter shown made two packs idea can easily extended two packs device essentially con nects packs series Out models charger same current flows through cells Check out smaller packs its almost like having several chargers running same time Finally several readers have asked hi-b toggle switch pictured own modi fied Astro 102 charger labeled 1-14 10-22 article explained modifica tion effect used up about two cells worth charger output capability However model 102 specified having capability up 28 cells 28 minus two should 26 Yup Thats correct arithmetic reality however found could re liably charge 28 cells four-plus amps unmodified Super Charger actual up per cell-count limit highly dependent condition auto battery terminals some other things well So consistent nor mal conservative preference practice chose label switch cell counts reflect re ality operational limitations over wide range operating conditions think youll find ratings choices proper Keith Shaw name new column also often appears other columns well Keith may very well countrys plan cts best Electric modeler As such regu larly sought out othersI get reader requests address Well turns out Keith has just recently acquired new larger Continued page 145 911E BEST IN ELECTRIC FLIGHT SPECIALIZING IN ASTRO FLIGHT SYSTEMS TD i U 32]NH] E LF EI CI T0 RH IT CS Flight SsteHs 31 Perrj Street Niddleboro fIR 823463117 Phone 6179472885 C 9 PM Lets enjoy outdoorsin comfort Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats OuickTo St Up Change Instantly Give Protection FromThe Weather SIZE 72 X 120 60 sq ft P~ItF 35EAzE ss NING CANOPY 9vlO SPORTEING CANOPY 9olB rMnGv 0,lfl ALL OF THE NEW SIZES HAVE THE SAME FEATURES AS THE 6 xl 0 SPORTSMAN THE NEW Sx 10 ADD-A-SHADE KAY BE USED WITH.ALL OF OUR SHADE TENTS NEW SIZES AVAILASLE APRIL 1 lOSS TRAE-LOE-EYE-EI MAKES IT EASY TO USE YOUR PORTA-SHADE WITH ANY RIv THAT IS EQUIPPED WITH THE MOUNTED CANOPY TRACE YOUR R/V DEALER CAN SUPPLY THE TRACE IF YOU NEED ONE MECHANICS TOTETARP 4x 6 blue/White tGrp equipped handles rivited four corners can provide clean dry Surf ace field repairs can serve weather cover equipment against sun rein FREE LITERATURE IS AVAILABLE ON ALL FOUR N COMPANY PRODUCTS 4M Company 209 SW BuCy Avenue 4BartIeaviile OK 74003 Phone 918-336-9445 SCOPtS6o SoAsi PPR 4-6061I10$3SSS $300UPS 0010 NOASS PiN 4-606IcI0$3295V $300UPS Add-A-Shads Model APR 4-606II10$2995 $300UPS Neohamic Tots-TapO MT-lA4s6S 585 $150UPS R/V T6k-Lok-Ey6 Eli TAAZ51000 $150UPS Mamt6oC6rd--Vt.--IO0--Noy Opd6I-S--Cholu--06lsr IeqalrLs Evisd April 1988 51 FOUR CYCLE ACCESSORIES FOUR cycuFOUR CYCLE IN-COWL MUFFLERS ENGINE MOUNTSJT EAB ENTA AS AC UPOINV ENGINE..2000 JT-EAS ENYA AS AC UPIINVSIOE ENGINE2000 CASt AUGINMUM ALISJT-E65 ENYA 60-50 AC UPIINV ENGINE..2000 JT-ESS ENVA 60-SO AC UPIINVISIDE ENGINE 2700 SOCKS CAP nests cuog1758 ENVA 60-120 AC UPIINY ENGINE2700 47-ENS ENVA 60-120 AC UPIINVISIGE ENGINE 2700 DRILLED AND TAPPED PORIT-ERS ENVA 6 120 PC UP/INV ENGINE3000 UhISII0 P06 hAD600IT-ENS ENYA N 120 PC UPIINVISIDEENG.3000 HP vi iiicocIT-ASS II VT 46 UPIINV ENGINE2000 ENVA 35 AC AC1000iT-AGO lIP VT AS UPINVISIDE ENGINE2000 SAITO PA 301000JTNAS MAX PS AG UPINV ENGINE. 2000 Os MAX 40 PC1000iT-NAG MAX PS AG UP/INWSIOE ENGINE.0000 iT-GIG MAX PS 61 UPINV ENGINE 2000 05 MAX AOS1000 OS MAX ASS1000iT-SIS NAX PS SI UPIINVISIDE ENGINE..2000 SAITO PA AC AS1000i-GS MAO PS 60 UPIINV ENGINE2700 ENYA AS AC1000iT-NOS NAX PS 60 UP/INVISIDE ENGINE2700 WCSRA TA AC1000JT-M25 MAX PS 120 UP/INV ENGINE2700 lAP VT AG1200JT-M2S MAX P5120 UP/INV/SIOE ENGINE2700 UN0III6S P05 50 901100iT-NAB SAITO PA AS UP/INY ENGINE2000 OS MAX PS 61 1500 -iT-SAS SAITO PA 40 UPIINV/SIOE ENGINE2000 OS MAX PiT 565 SAITO PA 60 UP/INV ENGINE2000 ENYA 6060 60120ACI300iT-SOS SAITO PA 65 UP/INV/SIOE ENGINE2000 UIIGIIIIUSO 006 12016001028 SAITO PA 120 UP/ING ENGINE2700 OS MAX PS ISO1600 ENTA 6120 NC2000iT SOS SATTO PA 120 UPIINVIGIDE ENGINE 2700 OS MAX 12051600$J-IPOWER STICK SAITO PA 120 1600 SUPER TISRE 25001600 ENGINE TEST STANDS9ss CAST ALUMINUMa asos.at-ow-as atlI6n inch REGUlAR 1/ZA 60 $1150 GIANT I/lA TO 22 52500 ovci hobby shop OROtS DiftSCT Worledale SIm6flt CIUdL MO Vlscs MC COO accepted Add 5250 LP 5200 C00 arId 6 FREE CATALOG AT COSITERT OR FLYING FIELD couple months ago column devot ed interrelationship between Giant Scale models personal computers week af ter Id mailed manuscript off Reston VA old friend Col Art Johnson published column same subject RCM Although concern has CADS Computer Aided Design Systemsor mechani cal drawing computer Ive reminded host computer programs appli cable radio-controlled model aircraft dont draw single line Computer software has developed does everything telling prop hang front Zenoah calculating performance quarter-scale B-25 many modeler/computer experts programming like mad Inevitably someone collecting programs publication Curtis Givens has approached ViP Publishers company Yours Truly Dick Phillips have established have computer program youd like have included Curts book drop him note 5304 W Riverview Dayton OH 45406 course no bucks involvedonly prestige having name program pub lished printed booka free copy will receive uses program its pages Some bits pieces old workbench After youve fitted wheels axles trimmed axles flush outside edge wheel collars break Out solder ing iron/torch Remove wheel collars solder bit tin-can metal covers end collars brass take solder well Trim outside tin bits youll have what looks like scale hub cap better mechanical viewpoint tin cover keeps jamming wheel collars too far onto axleand binding normal free running wheels Malting plywood out plywood may sound kind dorky thats sure havent tried wont know strong What Im suggesting course use thin plywood go laminating curved parts next Giant Laminating strips wood around form way produce lightest strong est wing tips tail feather outlines possible Next time get lamination use Ms-in ply wood strips instead balsa Big Bird Unless curves extreme theres no need soak plywood hot water theres advantage using plywood over balsayou can cut longer strips 48-in sheet can softer wood event use relatively slow-drying white aliphatic resin glue laminating plywood strips applying spreading glue try keep having glue voids wrap ply lamination tightly around pack Give whole stack week dry thoroughly sand laminated part final size Im sure youll very impressed strength stability construction responding advertisers mention read about Model Aviation Electric model-building facility moved out apartment house now has space promising some unbelievably large Electrics Keith tells hes got biggie boards right nowso watch out 1988 Electric Fly goers Keith did send along new address asked include Keith Shaw 2756 Elmwood Ann Arbor MI 48104-6624 Part recent conversation Keith led some reflections 1987 Electric Fly Cover age meet appeared January 1988 sue MA included statements about increased use higher-power systems corresponding increased performance both pi lots planes Some months photos show what mean As generalization faster dramatic flight performances also shorter flight per formances because associated high power lev els drain battery faster Keith well-known sizzling aerobatic flight performances among other things spoke flight intensity sorts sheer thrill such highest levels performance de manding engrossing pilot doesnt feel flight short fact may feel flight long Hummm think what may have new Law Pro fessor Keith Ill dare dub Keiths First Law Fun Faster seems longer youre holding stick Well can tell firsthand youre holding stick GS 02GS 03 2656346 GRATE-SHAPESTM SANDING BLOCKS Long lasting silicon carbide grit sides 10 Long GS 101 1/4 & 3/6 Combo package #1-GS 101 102 103 $1195 S&HSAVE Six Pack Combo- GSa above $2195 S&H Single GS $495 S&H AZ RESIDENTS ADD 55k TAX products guaranteed ers invited Ask hobby dealer tlrat SEND CHECK OR*\XMASTER CHARGE MONEY ORDER TOOR VISA ACCEPTED Bell Rock Industries6466 Hwy 179-Suite 108 Sdona AZ 66336 1602 2841806 GRATE-SHAPESTM ROUNDS GS 200 PKG 9 long$795 S&H GS 104GS 105GS 106 318 & 518 900 Vs w1518 450 6900 Combo package #2-GS 104 105 106 $1195 S&H GRATE-S HAPESTM SQUARES GS 300 PKG 9 long$495 S&H April 1988 145 RC Giant Scale/de VriesRC Electrics/Kopski Continued page 49Continued page 51 otherwise witnessing kinds flights same law holds true Beyond just beginning Over years mail Ive received has readers want get started Electric majority modelers want economically other extreme can recall perhaps two three letters topic interest FAI Electric event As result dominant reader interest have over years devoted much column space addressing beginner Now Id like move up bit address next pop ular question What next quite honestly what Im about get con tinue next month would serve perfectly well just beginners toodepending intent interest resources thinks safe say popular Electric power systems using up sev en cells six seven cells topping pop ularity charts easy understand cause so-called 05 Yuk hate kind nomenclature motors available ranging economy can types very impressive cobalts also low-cost chargers available associated batteries techni cally quite easy charge such packs dinary auto battery going 05 route just seems like natural approach firsttime Electric getting under seven-cell ceiling easy understandable also rather con fining place Going beyond seven cells op ens up whole new world practical power levelsand plane/performance combinations readily attainable smaller packs folks have enjoyed saturation first 05 systems begin asking What next imme diately focus chargers thats what next begins Generally first questions back quiring folks have own feelings outlook toward future Electric modeling lives person feels Electric will always play partand especially its partI immediately give strong encouragement getting high-capability charger Buying charger capable charging seven cells immediately puts faceto-face investment thats beyond $100 some very serious matter way see burning up about eight 10 gal lons glow glop about same cost hav ing nothing show except greasy clothes its gone falr complete must also say charging larger packs large investment entirely possible simply breaks up larger battery smaller packs cells can individually charged economy charger practice best done having smaller packs fitted connectors plug both charger wiring harness model latter harness configured individual packs connected series appear motor single battery cells has offered commercially Astro example 12-cell battery 15 made up two six-packs technically doable disconnect ing/connecting operation messy royale payne quickly tires An intermediate-cost-level approach con struct simple high-capacity charger such presented columns May June 1985 issues easily made charging sys tem based standard six- seven-cell econ omy charger some readily available parts 146 Model Aviation supplies can charge 18 cells time no disconnecting/connect ing encourage larger-system tentions find back issues see what Im talking about slickest approach remains commercially made high-capability chargers Among Robbe Automax Astro Model 102 popular recent KRC Electric Fly As soon has own approach dealing above-seven-cell charging challenge squared away next step decide what bigger power system consider sense just tough problem now charging limitations Out picture varied larger-system choices lie out tempt tease Choosing wisely automatically requires have some idea about what youd like fly course just much additional money wish invest Personally very much like 15-size motors have six geared find very versatile have seen flown seven 14 cellswith prop er plane/prop choices courseand perhaps best next cost-step beyond 05 category course also fly 25s 40s Like said ole new world uture columns See also MA April 1985 Electric competition rules new 1 988-89 AMA Competition Regulations Book out available AMA sending little card came packaged renewed AMA license can get just sending letter also Anyway book unique first time Regulations book contains AMA Electric rules bona fide unified format way back book theless can tell lots folks worked very hard sometimes emotionally establish very first rules know parts satisfactory personsincluding myself thats life know no knows thing until see Almighty participating flight line Im perfectly content intend supportive what have work now Im encouraging everyone like wise view first-time Electric rules what workable start put use local areas experience results drop line tell reactlon Ill maintain informal compilation inputs couple years its time review/revise AMA rules again Ill publish summary inputs above operative word USE ones have never forgetting before just beginning Silentiusmore December 1987 column briefly discussed local modelers grand suc cess Hobby Lobby/Graupner-powered Silentius Since Ive enjoyed friendly let ter Jim Martin HL Jim tells has opportunity fly Mr G friends noted doing much better finding staying weak thermals Jim noticed others flying split sticks rudder stick elevator other general werent touch ing elevator stlck Jim went say forced himself resist temptation wiggle own elevator stick presto model did much better its own Well Im familiar feeling Im hoping sharing offer ing will get longer flights too Continued page 152 RC Electrics/Kopski Continued page 146 Thanks Jim input insight Incidentally local modeler just complet ing HL Electric Pronto should have some inputs future columns Electric supplies continue available CS Flight Systems recent conversation owner/Electric modeler Charles Sylvia learned continuing expansion catalog updates latest discounted Electric supplies send two bucks Charlie CS Flight Systems 31 Perry St Box 775 Middleboro MA 02346 Tell em Bob sent ya must close another column singular frustration writing column low ceiling column size have far share can get print month Please forward comment question SASE please address listed very top column FLASH Just announceda new Electric kit Guillow Its Aeronca designed Woody Blanchard Woody chaired committee re sponsible first-ever AMA Electric rules discussed above 530-sq-in 67-in-span kit OSs should available about time read RC Old-Timers/Mathews Continued page 53 events has obviously worked Out well since own local SAM chapter has several flying Eut has now developed obscureand certainly structurally complexflying wing named simply Gross Wing after its designer Things get bit odd photo ap pears January 1942 Air Trails con struction article published until January 1948 postwar article design al tered include fuselage-mounted rudder ever Bernard Gross states 1948 Air Trails article original 1941 wing used basis Eut has utilized 1942 pho fuselage rudder planform has com bined airfoils outline 1948 version Whether design has au thenticated know time writing Longtime friend Bill Baker has taken over Free Flight Old-Timers column magazine challenged explain new SAM rules RC No way Baker figure will least year before jail-house lawyers have worked way through contradictions What will use Eut Tilestons latest project point Out some major changes SAM rules refer modelers really interested new SAM rule book Eut has scaled Gross Flying Wing up 675 sq wing area meet SAMs 225-sq-inper- 10-cu-in-of-displacement rule makes legal 30 cu two-cycle power plant Eut used Enya 46 four-stroke un der old rules classified according 60% its displacement 60% 46 cu However under new rules model now illegal since four-cycle engines classified ac cording full displacements As built Euts Gross Wing spans 84 152 Model Aviation FIBERGLASS PARTS WET Y SAFE OXY unique two-component epoxy laminating system developed offer user safest highest quality laminating resin available VA Pt Kit-S140O 1V2 Qt Kit-$210O Glass Cloth 58 oz/sq yd 38x6ft-$90038xl5ft-S190O 38 x30 ft $3500 add $250 Ship 8 Hand above items Send SASE additional information ACPs Ughtweight Composite Materials Order COD Send Check Money Order AEROSPACE COMPOSITE PRODUCTS P0 Box 16621 IDept Al Irvine CA 92714 Source Lightweight Materials Over 237 Cowls kit scratch built models Also over 34 round cowls ranging 4 14-7/8 diameter 55 diff size 8 shape wheel pants custom Make Parts Vacuum Form Canopies P1gm wud $1 couplet kt T&D FIBERGLASS SPECIALTIES 30925 Block Dept 4 Garden City Ml 48135 PHONE 1313421-6358 BRAZED & HEAT-TREATED WIRE GEARS & CASANES PHONE 3131 261-9064
Edition: Model Aviation - 1988/04
Page Numbers: 50, 51, 145, 146, 152
FOLLOW UP September/October 1987 col umns offered information modify Astro Model 102 DC/DC Super Charger modified charger features current-regulated performance ie charge current set remains relatively constant over duration charge cycle modification also allows charger used connected automobile electrical system auto engine runningsomething possible degree safety other type charger otherwise Reader response offering has quite positive also quite inquisitive answers some popular questions No No No NOT recommend using Astro Super Charger connected automobile cigarette lighter socket fact recom mend using receptacle ordinary simple 6/7-cell chargers fact car cig arette lighter sockets mating accessory plugs often form very unreliable ohmic connec tion Ive seen situation times field frustrated modelers being able get reasonable flight because Poor-quality connections charger-to-autobattery trouble charger high-capability larger cell count Charg ing large packs means charger putting out lots power can tak ing lots power translates drawing lots current auto batteryjust exactly situation demands high-quality connec tionNOT wifty such lighter recepta cle likely provide Going beyond modified Super Charg er can MUCH MORE DEMANDING input-connection quality reason modified charger maintains relatively steady output charging current relatively independent input voltage does example automatically adjusting its input cur rent upward make up lowering input volt age total input power input voltage times input current divided efficiency equals output power motor battery voltage times charging current Similarly input current drops auto battery voltage risessuch engine running technically inclined charger input characterizationtaking current lower voltage vice versais nega tive resistance above should clear power ing modified charger through lossy ohmic connectionssuch lighter sockets often actually results charger drawing higher put current turn causes voltage drop poor contactwhich results larger current drawwhich turn causes voltage losswhich turnwell get idea Its great way pop fuses may recall modification article recommended substituting LARGE battery clips rather small ones come charger Now know fact rec ommendation held chose modification reference article also described use charger driving field amy ing ready fly trueI actually thisbut DONT use cigarette lighter connector Rather use additionally installed heavy wiring running directly auto battery terminals connectors rear car installa tion described March July 1985 is50 Model Aviation Rado Control Electncs Bob Kopski 25 West End Dr Lansdale PA 19446 Magnificent Ford Flivver Chris True Peekskill NY flown 87 KRC Electric Fly 45-in-span plastic model kit three-view scaled up 65-in span project Pattern-wind Astro 60 24 1200 mAh cells gives spectacular performance Power control Jomar Flying weight 8 lb Construction like giant rubber-power model lots Y4-in-sq stringers some balsa sheet Can anyone guess what Mystery Electric L April Fool info next month Dick Wetzel Bath PA scratch-built splendid Lockheed P-38 R Model yet completed shown Span 84 scaled up Guillow rubber kit Power will two Astro 25 Super Ferrites 281200 mAh cells customized Jomar SC-3 power control Model weighs 65 lb has 900-sq-in wing Keith Shaws latest 87 Electric Fly scaled prototype Waco Taperwing owned Bob Lyjak neighbor Keiths Keller 50/24 motor 16 1200 mAh cells powers 5-lb craft Wingspan 48 sues MA Serious Electric fliers may want consider such additional wiring Having used myself several years would now definitely look back July 85 column will find goody thats natural use Astro 102 Super Charger modified column described charge-splitter very simple device made up some wire charge connectors 35mm film canister used conjunction highcapability chargers charge bat tery pack time limitations its use packs must made up same size cells ie cells must same ampere-hour capacity total number cells must exceed capacity charger ie though cells same battery pack does matter individual packs different cell count charge-splitter shown made two packs idea can easily extended two packs device essentially con nects packs series Out models charger same current flows through cells Check out smaller packs its almost like having several chargers running same time Finally several readers have asked hi-b toggle switch pictured own modi fied Astro 102 charger labeled 1-14 10-22 article explained modifica tion effect used up about two cells worth charger output capability However model 102 specified having capability up 28 cells 28 minus two should 26 Yup Thats correct arithmetic reality however found could re liably charge 28 cells four-plus amps unmodified Super Charger actual up per cell-count limit highly dependent condition auto battery terminals some other things well So consistent nor mal conservative preference practice chose label switch cell counts reflect re ality operational limitations over wide range operating conditions think youll find ratings choices proper Keith Shaw name new column also often appears other columns well Keith may very well countrys plan cts best Electric modeler As such regu larly sought out othersI get reader requests address Well turns out Keith has just recently acquired new larger Continued page 145 911E BEST IN ELECTRIC FLIGHT SPECIALIZING IN ASTRO FLIGHT SYSTEMS TD i U 32]NH] E LF EI CI T0 RH IT CS Flight SsteHs 31 Perrj Street Niddleboro fIR 823463117 Phone 6179472885 C 9 PM Lets enjoy outdoorsin comfort Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats OuickTo St Up Change Instantly Give Protection FromThe Weather SIZE 72 X 120 60 sq ft P~ItF 35EAzE ss NING CANOPY 9vlO SPORTEING CANOPY 9olB rMnGv 0,lfl ALL OF THE NEW SIZES HAVE THE SAME FEATURES AS THE 6 xl 0 SPORTSMAN THE NEW Sx 10 ADD-A-SHADE KAY BE USED WITH.ALL OF OUR SHADE TENTS NEW SIZES AVAILASLE APRIL 1 lOSS TRAE-LOE-EYE-EI MAKES IT EASY TO USE YOUR PORTA-SHADE WITH ANY RIv THAT IS EQUIPPED WITH THE MOUNTED CANOPY TRACE YOUR R/V DEALER CAN SUPPLY THE TRACE IF YOU NEED ONE MECHANICS TOTETARP 4x 6 blue/White tGrp equipped handles rivited four corners can provide clean dry Surf ace field repairs can serve weather cover equipment against sun rein FREE LITERATURE IS AVAILABLE ON ALL FOUR N COMPANY PRODUCTS 4M Company 209 SW BuCy Avenue 4BartIeaviile OK 74003 Phone 918-336-9445 SCOPtS6o SoAsi PPR 4-6061I10$3SSS $300UPS 0010 NOASS PiN 4-606IcI0$3295V $300UPS Add-A-Shads Model APR 4-606II10$2995 $300UPS Neohamic Tots-TapO MT-lA4s6S 585 $150UPS R/V T6k-Lok-Ey6 Eli TAAZ51000 $150UPS Mamt6oC6rd--Vt.--IO0--Noy Opd6I-S--Cholu--06lsr IeqalrLs Evisd April 1988 51 FOUR CYCLE ACCESSORIES FOUR cycuFOUR CYCLE IN-COWL MUFFLERS ENGINE MOUNTSJT EAB ENTA AS AC UPOINV ENGINE..2000 JT-EAS ENYA AS AC UPIINVSIOE ENGINE2000 CASt AUGINMUM ALISJT-E65 ENYA 60-50 AC UPIINV ENGINE..2000 JT-ESS ENVA 60-SO AC UPIINVISIDE ENGINE 2700 SOCKS CAP nests cuog1758 ENVA 60-120 AC UPIINY ENGINE2700 47-ENS ENVA 60-120 AC UPIINVISIGE ENGINE 2700 DRILLED AND TAPPED PORIT-ERS ENVA 6 120 PC UP/INV ENGINE3000 UhISII0 P06 hAD600IT-ENS ENYA N 120 PC UPIINVISIDEENG.3000 HP vi iiicocIT-ASS II VT 46 UPIINV ENGINE2000 ENVA 35 AC AC1000iT-AGO lIP VT AS UPINVISIDE ENGINE2000 SAITO PA 301000JTNAS MAX PS AG UPINV ENGINE. 2000 Os MAX 40 PC1000iT-NAG MAX PS AG UP/INWSIOE ENGINE.0000 iT-GIG MAX PS 61 UPINV ENGINE 2000 05 MAX AOS1000 OS MAX ASS1000iT-SIS NAX PS SI UPIINVISIDE ENGINE..2000 SAITO PA AC AS1000i-GS MAO PS 60 UPIINV ENGINE2700 ENYA AS AC1000iT-NOS NAX PS 60 UP/INVISIDE ENGINE2700 WCSRA TA AC1000JT-M25 MAX PS 120 UP/INV ENGINE2700 lAP VT AG1200JT-M2S MAX P5120 UP/INV/SIOE ENGINE2700 UN0III6S P05 50 901100iT-NAB SAITO PA AS UP/INY ENGINE2000 OS MAX PS 61 1500 -iT-SAS SAITO PA 40 UPIINV/SIOE ENGINE2000 OS MAX PiT 565 SAITO PA 60 UP/INV ENGINE2000 ENYA 6060 60120ACI300iT-SOS SAITO PA 65 UP/INV/SIOE ENGINE2000 UIIGIIIIUSO 006 12016001028 SAITO PA 120 UP/ING ENGINE2700 OS MAX PS ISO1600 ENTA 6120 NC2000iT SOS SATTO PA 120 UPIINVIGIDE ENGINE 2700 OS MAX 12051600$J-IPOWER STICK SAITO PA 120 1600 SUPER TISRE 25001600 ENGINE TEST STANDS9ss CAST ALUMINUMa asos.at-ow-as atlI6n inch REGUlAR 1/ZA 60 $1150 GIANT I/lA TO 22 52500 ovci hobby shop OROtS DiftSCT Worledale SIm6flt CIUdL MO Vlscs MC COO accepted Add 5250 LP 5200 C00 arId 6 FREE CATALOG AT COSITERT OR FLYING FIELD couple months ago column devot ed interrelationship between Giant Scale models personal computers week af ter Id mailed manuscript off Reston VA old friend Col Art Johnson published column same subject RCM Although concern has CADS Computer Aided Design Systemsor mechani cal drawing computer Ive reminded host computer programs appli cable radio-controlled model aircraft dont draw single line Computer software has developed does everything telling prop hang front Zenoah calculating performance quarter-scale B-25 many modeler/computer experts programming like mad Inevitably someone collecting programs publication Curtis Givens has approached ViP Publishers company Yours Truly Dick Phillips have established have computer program youd like have included Curts book drop him note 5304 W Riverview Dayton OH 45406 course no bucks involvedonly prestige having name program pub lished printed booka free copy will receive uses program its pages Some bits pieces old workbench After youve fitted wheels axles trimmed axles flush outside edge wheel collars break Out solder ing iron/torch Remove wheel collars solder bit tin-can metal covers end collars brass take solder well Trim outside tin bits youll have what looks like scale hub cap better mechanical viewpoint tin cover keeps jamming wheel collars too far onto axleand binding normal free running wheels Malting plywood out plywood may sound kind dorky thats sure havent tried wont know strong What Im suggesting course use thin plywood go laminating curved parts next Giant Laminating strips wood around form way produce lightest strong est wing tips tail feather outlines possible Next time get lamination use Ms-in ply wood strips instead balsa Big Bird Unless curves extreme theres no need soak plywood hot water theres advantage using plywood over balsayou can cut longer strips 48-in sheet can softer wood event use relatively slow-drying white aliphatic resin glue laminating plywood strips applying spreading glue try keep having glue voids wrap ply lamination tightly around pack Give whole stack week dry thoroughly sand laminated part final size Im sure youll very impressed strength stability construction responding advertisers mention read about Model Aviation Electric model-building facility moved out apartment house now has space promising some unbelievably large Electrics Keith tells hes got biggie boards right nowso watch out 1988 Electric Fly goers Keith did send along new address asked include Keith Shaw 2756 Elmwood Ann Arbor MI 48104-6624 Part recent conversation Keith led some reflections 1987 Electric Fly Cover age meet appeared January 1988 sue MA included statements about increased use higher-power systems corresponding increased performance both pi lots planes Some months photos show what mean As generalization faster dramatic flight performances also shorter flight per formances because associated high power lev els drain battery faster Keith well-known sizzling aerobatic flight performances among other things spoke flight intensity sorts sheer thrill such highest levels performance de manding engrossing pilot doesnt feel flight short fact may feel flight long Hummm think what may have new Law Pro fessor Keith Ill dare dub Keiths First Law Fun Faster seems longer youre holding stick Well can tell firsthand youre holding stick GS 02GS 03 2656346 GRATE-SHAPESTM SANDING BLOCKS Long lasting silicon carbide grit sides 10 Long GS 101 1/4 & 3/6 Combo package #1-GS 101 102 103 $1195 S&HSAVE Six Pack Combo- GSa above $2195 S&H Single GS $495 S&H AZ RESIDENTS ADD 55k TAX products guaranteed ers invited Ask hobby dealer tlrat SEND CHECK OR*\XMASTER CHARGE MONEY ORDER TOOR VISA ACCEPTED Bell Rock Industries6466 Hwy 179-Suite 108 Sdona AZ 66336 1602 2841806 GRATE-SHAPESTM ROUNDS GS 200 PKG 9 long$795 S&H GS 104GS 105GS 106 318 & 518 900 Vs w1518 450 6900 Combo package #2-GS 104 105 106 $1195 S&H GRATE-S HAPESTM SQUARES GS 300 PKG 9 long$495 S&H April 1988 145 RC Giant Scale/de VriesRC Electrics/Kopski Continued page 49Continued page 51 otherwise witnessing kinds flights same law holds true Beyond just beginning Over years mail Ive received has readers want get started Electric majority modelers want economically other extreme can recall perhaps two three letters topic interest FAI Electric event As result dominant reader interest have over years devoted much column space addressing beginner Now Id like move up bit address next pop ular question What next quite honestly what Im about get con tinue next month would serve perfectly well just beginners toodepending intent interest resources thinks safe say popular Electric power systems using up sev en cells six seven cells topping pop ularity charts easy understand cause so-called 05 Yuk hate kind nomenclature motors available ranging economy can types very impressive cobalts also low-cost chargers available associated batteries techni cally quite easy charge such packs dinary auto battery going 05 route just seems like natural approach firsttime Electric getting under seven-cell ceiling easy understandable also rather con fining place Going beyond seven cells op ens up whole new world practical power levelsand plane/performance combinations readily attainable smaller packs folks have enjoyed saturation first 05 systems begin asking What next imme diately focus chargers thats what next begins Generally first questions back quiring folks have own feelings outlook toward future Electric modeling lives person feels Electric will always play partand especially its partI immediately give strong encouragement getting high-capability charger Buying charger capable charging seven cells immediately puts faceto-face investment thats beyond $100 some very serious matter way see burning up about eight 10 gal lons glow glop about same cost hav ing nothing show except greasy clothes its gone falr complete must also say charging larger packs large investment entirely possible simply breaks up larger battery smaller packs cells can individually charged economy charger practice best done having smaller packs fitted connectors plug both charger wiring harness model latter harness configured individual packs connected series appear motor single battery cells has offered commercially Astro example 12-cell battery 15 made up two six-packs technically doable disconnect ing/connecting operation messy royale payne quickly tires An intermediate-cost-level approach con struct simple high-capacity charger such presented columns May June 1985 issues easily made charging sys tem based standard six- seven-cell econ omy charger some readily available parts 146 Model Aviation supplies can charge 18 cells time no disconnecting/connect ing encourage larger-system tentions find back issues see what Im talking about slickest approach remains commercially made high-capability chargers Among Robbe Automax Astro Model 102 popular recent KRC Electric Fly As soon has own approach dealing above-seven-cell charging challenge squared away next step decide what bigger power system consider sense just tough problem now charging limitations Out picture varied larger-system choices lie out tempt tease Choosing wisely automatically requires have some idea about what youd like fly course just much additional money wish invest Personally very much like 15-size motors have six geared find very versatile have seen flown seven 14 cellswith prop er plane/prop choices courseand perhaps best next cost-step beyond 05 category course also fly 25s 40s Like said ole new world uture columns See also MA April 1985 Electric competition rules new 1 988-89 AMA Competition Regulations Book out available AMA sending little card came packaged renewed AMA license can get just sending letter also Anyway book unique first time Regulations book contains AMA Electric rules bona fide unified format way back book theless can tell lots folks worked very hard sometimes emotionally establish very first rules know parts satisfactory personsincluding myself thats life know no knows thing until see Almighty participating flight line Im perfectly content intend supportive what have work now Im encouraging everyone like wise view first-time Electric rules what workable start put use local areas experience results drop line tell reactlon Ill maintain informal compilation inputs couple years its time review/revise AMA rules again Ill publish summary inputs above operative word USE ones have never forgetting before just beginning Silentiusmore December 1987 column briefly discussed local modelers grand suc cess Hobby Lobby/Graupner-powered Silentius Since Ive enjoyed friendly let ter Jim Martin HL Jim tells has opportunity fly Mr G friends noted doing much better finding staying weak thermals Jim noticed others flying split sticks rudder stick elevator other general werent touch ing elevator stlck Jim went say forced himself resist temptation wiggle own elevator stick presto model did much better its own Well Im familiar feeling Im hoping sharing offer ing will get longer flights too Continued page 152 RC Electrics/Kopski Continued page 146 Thanks Jim input insight Incidentally local modeler just complet ing HL Electric Pronto should have some inputs future columns Electric supplies continue available CS Flight Systems recent conversation owner/Electric modeler Charles Sylvia learned continuing expansion catalog updates latest discounted Electric supplies send two bucks Charlie CS Flight Systems 31 Perry St Box 775 Middleboro MA 02346 Tell em Bob sent ya must close another column singular frustration writing column low ceiling column size have far share can get print month Please forward comment question SASE please address listed very top column FLASH Just announceda new Electric kit Guillow Its Aeronca designed Woody Blanchard Woody chaired committee re sponsible first-ever AMA Electric rules discussed above 530-sq-in 67-in-span kit OSs should available about time read RC Old-Timers/Mathews Continued page 53 events has obviously worked Out well since own local SAM chapter has several flying Eut has now developed obscureand certainly structurally complexflying wing named simply Gross Wing after its designer Things get bit odd photo ap pears January 1942 Air Trails con struction article published until January 1948 postwar article design al tered include fuselage-mounted rudder ever Bernard Gross states 1948 Air Trails article original 1941 wing used basis Eut has utilized 1942 pho fuselage rudder planform has com bined airfoils outline 1948 version Whether design has au thenticated know time writing Longtime friend Bill Baker has taken over Free Flight Old-Timers column magazine challenged explain new SAM rules RC No way Baker figure will least year before jail-house lawyers have worked way through contradictions What will use Eut Tilestons latest project point Out some major changes SAM rules refer modelers really interested new SAM rule book Eut has scaled Gross Flying Wing up 675 sq wing area meet SAMs 225-sq-inper- 10-cu-in-of-displacement rule makes legal 30 cu two-cycle power plant Eut used Enya 46 four-stroke un der old rules classified according 60% its displacement 60% 46 cu However under new rules model now illegal since four-cycle engines classified ac cording full displacements As built Euts Gross Wing spans 84 152 Model Aviation FIBERGLASS PARTS WET Y SAFE OXY unique two-component epoxy laminating system developed offer user safest highest quality laminating resin available VA Pt Kit-S140O 1V2 Qt Kit-$210O Glass Cloth 58 oz/sq yd 38x6ft-$90038xl5ft-S190O 38 x30 ft $3500 add $250 Ship 8 Hand above items Send SASE additional information ACPs Ughtweight Composite Materials Order COD Send Check Money Order AEROSPACE COMPOSITE PRODUCTS P0 Box 16621 IDept Al Irvine CA 92714 Source Lightweight Materials Over 237 Cowls kit scratch built models Also over 34 round cowls ranging 4 14-7/8 diameter 55 diff size 8 shape wheel pants custom Make Parts Vacuum Form Canopies P1gm wud $1 couplet kt T&D FIBERGLASS SPECIALTIES 30925 Block Dept 4 Garden City Ml 48135 PHONE 1313421-6358 BRAZED & HEAT-TREATED WIRE GEARS & CASANES PHONE 3131 261-9064
Edition: Model Aviation - 1988/04
Page Numbers: 50, 51, 145, 146, 152
FOLLOW UP September/October 1987 col umns offered information modify Astro Model 102 DC/DC Super Charger modified charger features current-regulated performance ie charge current set remains relatively constant over duration charge cycle modification also allows charger used connected automobile electrical system auto engine runningsomething possible degree safety other type charger otherwise Reader response offering has quite positive also quite inquisitive answers some popular questions No No No NOT recommend using Astro Super Charger connected automobile cigarette lighter socket fact recom mend using receptacle ordinary simple 6/7-cell chargers fact car cig arette lighter sockets mating accessory plugs often form very unreliable ohmic connec tion Ive seen situation times field frustrated modelers being able get reasonable flight because Poor-quality connections charger-to-autobattery trouble charger high-capability larger cell count Charg ing large packs means charger putting out lots power can tak ing lots power translates drawing lots current auto batteryjust exactly situation demands high-quality connec tionNOT wifty such lighter recepta cle likely provide Going beyond modified Super Charg er can MUCH MORE DEMANDING input-connection quality reason modified charger maintains relatively steady output charging current relatively independent input voltage does example automatically adjusting its input cur rent upward make up lowering input volt age total input power input voltage times input current divided efficiency equals output power motor battery voltage times charging current Similarly input current drops auto battery voltage risessuch engine running technically inclined charger input characterizationtaking current lower voltage vice versais nega tive resistance above should clear power ing modified charger through lossy ohmic connectionssuch lighter sockets often actually results charger drawing higher put current turn causes voltage drop poor contactwhich results larger current drawwhich turn causes voltage losswhich turnwell get idea Its great way pop fuses may recall modification article recommended substituting LARGE battery clips rather small ones come charger Now know fact rec ommendation held chose modification reference article also described use charger driving field amy ing ready fly trueI actually thisbut DONT use cigarette lighter connector Rather use additionally installed heavy wiring running directly auto battery terminals connectors rear car installa tion described March July 1985 is50 Model Aviation Rado Control Electncs Bob Kopski 25 West End Dr Lansdale PA 19446 Magnificent Ford Flivver Chris True Peekskill NY flown 87 KRC Electric Fly 45-in-span plastic model kit three-view scaled up 65-in span project Pattern-wind Astro 60 24 1200 mAh cells gives spectacular performance Power control Jomar Flying weight 8 lb Construction like giant rubber-power model lots Y4-in-sq stringers some balsa sheet Can anyone guess what Mystery Electric L April Fool info next month Dick Wetzel Bath PA scratch-built splendid Lockheed P-38 R Model yet completed shown Span 84 scaled up Guillow rubber kit Power will two Astro 25 Super Ferrites 281200 mAh cells customized Jomar SC-3 power control Model weighs 65 lb has 900-sq-in wing Keith Shaws latest 87 Electric Fly scaled prototype Waco Taperwing owned Bob Lyjak neighbor Keiths Keller 50/24 motor 16 1200 mAh cells powers 5-lb craft Wingspan 48 sues MA Serious Electric fliers may want consider such additional wiring Having used myself several years would now definitely look back July 85 column will find goody thats natural use Astro 102 Super Charger modified column described charge-splitter very simple device made up some wire charge connectors 35mm film canister used conjunction highcapability chargers charge bat tery pack time limitations its use packs must made up same size cells ie cells must same ampere-hour capacity total number cells must exceed capacity charger ie though cells same battery pack does matter individual packs different cell count charge-splitter shown made two packs idea can easily extended two packs device essentially con nects packs series Out models charger same current flows through cells Check out smaller packs its almost like having several chargers running same time Finally several readers have asked hi-b toggle switch pictured own modi fied Astro 102 charger labeled 1-14 10-22 article explained modifica tion effect used up about two cells worth charger output capability However model 102 specified having capability up 28 cells 28 minus two should 26 Yup Thats correct arithmetic reality however found could re liably charge 28 cells four-plus amps unmodified Super Charger actual up per cell-count limit highly dependent condition auto battery terminals some other things well So consistent nor mal conservative preference practice chose label switch cell counts reflect re ality operational limitations over wide range operating conditions think youll find ratings choices proper Keith Shaw name new column also often appears other columns well Keith may very well countrys plan cts best Electric modeler As such regu larly sought out othersI get reader requests address Well turns out Keith has just recently acquired new larger Continued page 145 911E BEST IN ELECTRIC FLIGHT SPECIALIZING IN ASTRO FLIGHT SYSTEMS TD i U 32]NH] E LF EI CI T0 RH IT CS Flight SsteHs 31 Perrj Street Niddleboro fIR 823463117 Phone 6179472885 C 9 PM Lets enjoy outdoorsin comfort Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats OuickTo St Up Change Instantly Give Protection FromThe Weather SIZE 72 X 120 60 sq ft P~ItF 35EAzE ss NING CANOPY 9vlO SPORTEING CANOPY 9olB rMnGv 0,lfl ALL OF THE NEW SIZES HAVE THE SAME FEATURES AS THE 6 xl 0 SPORTSMAN THE NEW Sx 10 ADD-A-SHADE KAY BE USED WITH.ALL OF OUR SHADE TENTS NEW SIZES AVAILASLE APRIL 1 lOSS TRAE-LOE-EYE-EI MAKES IT EASY TO USE YOUR PORTA-SHADE WITH ANY RIv THAT IS EQUIPPED WITH THE MOUNTED CANOPY TRACE YOUR R/V DEALER CAN SUPPLY THE TRACE IF YOU NEED ONE MECHANICS TOTETARP 4x 6 blue/White tGrp equipped handles rivited four corners can provide clean dry Surf ace field repairs can serve weather cover equipment against sun rein FREE LITERATURE IS AVAILABLE ON ALL FOUR N COMPANY PRODUCTS 4M Company 209 SW BuCy Avenue 4BartIeaviile OK 74003 Phone 918-336-9445 SCOPtS6o SoAsi PPR 4-6061I10$3SSS $300UPS 0010 NOASS PiN 4-606IcI0$3295V $300UPS Add-A-Shads Model APR 4-606II10$2995 $300UPS Neohamic Tots-TapO MT-lA4s6S 585 $150UPS R/V T6k-Lok-Ey6 Eli TAAZ51000 $150UPS Mamt6oC6rd--Vt.--IO0--Noy Opd6I-S--Cholu--06lsr IeqalrLs Evisd April 1988 51 FOUR CYCLE ACCESSORIES FOUR cycuFOUR CYCLE IN-COWL MUFFLERS ENGINE MOUNTSJT EAB ENTA AS AC UPOINV ENGINE..2000 JT-EAS ENYA AS AC UPIINVSIOE ENGINE2000 CASt AUGINMUM ALISJT-E65 ENYA 60-50 AC UPIINV ENGINE..2000 JT-ESS ENVA 60-SO AC UPIINVISIDE ENGINE 2700 SOCKS CAP nests cuog1758 ENVA 60-120 AC UPIINY ENGINE2700 47-ENS ENVA 60-120 AC UPIINVISIGE ENGINE 2700 DRILLED AND TAPPED PORIT-ERS ENVA 6 120 PC UP/INV ENGINE3000 UhISII0 P06 hAD600IT-ENS ENYA N 120 PC UPIINVISIDEENG.3000 HP vi iiicocIT-ASS II VT 46 UPIINV ENGINE2000 ENVA 35 AC AC1000iT-AGO lIP VT AS UPINVISIDE ENGINE2000 SAITO PA 301000JTNAS MAX PS AG UPINV ENGINE. 2000 Os MAX 40 PC1000iT-NAG MAX PS AG UP/INWSIOE ENGINE.0000 iT-GIG MAX PS 61 UPINV ENGINE 2000 05 MAX AOS1000 OS MAX ASS1000iT-SIS NAX PS SI UPIINVISIDE ENGINE..2000 SAITO PA AC AS1000i-GS MAO PS 60 UPIINV ENGINE2700 ENYA AS AC1000iT-NOS NAX PS 60 UP/INVISIDE ENGINE2700 WCSRA TA AC1000JT-M25 MAX PS 120 UP/INV ENGINE2700 lAP VT AG1200JT-M2S MAX P5120 UP/INV/SIOE ENGINE2700 UN0III6S P05 50 901100iT-NAB SAITO PA AS UP/INY ENGINE2000 OS MAX PS 61 1500 -iT-SAS SAITO PA 40 UPIINV/SIOE ENGINE2000 OS MAX PiT 565 SAITO PA 60 UP/INV ENGINE2000 ENYA 6060 60120ACI300iT-SOS SAITO PA 65 UP/INV/SIOE ENGINE2000 UIIGIIIIUSO 006 12016001028 SAITO PA 120 UP/ING ENGINE2700 OS MAX PS ISO1600 ENTA 6120 NC2000iT SOS SATTO PA 120 UPIINVIGIDE ENGINE 2700 OS MAX 12051600$J-IPOWER STICK SAITO PA 120 1600 SUPER TISRE 25001600 ENGINE TEST STANDS9ss CAST ALUMINUMa asos.at-ow-as atlI6n inch REGUlAR 1/ZA 60 $1150 GIANT I/lA TO 22 52500 ovci hobby shop OROtS DiftSCT Worledale SIm6flt CIUdL MO Vlscs MC COO accepted Add 5250 LP 5200 C00 arId 6 FREE CATALOG AT COSITERT OR FLYING FIELD couple months ago column devot ed interrelationship between Giant Scale models personal computers week af ter Id mailed manuscript off Reston VA old friend Col Art Johnson published column same subject RCM Although concern has CADS Computer Aided Design Systemsor mechani cal drawing computer Ive reminded host computer programs appli cable radio-controlled model aircraft dont draw single line Computer software has developed does everything telling prop hang front Zenoah calculating performance quarter-scale B-25 many modeler/computer experts programming like mad Inevitably someone collecting programs publication Curtis Givens has approached ViP Publishers company Yours Truly Dick Phillips have established have computer program youd like have included Curts book drop him note 5304 W Riverview Dayton OH 45406 course no bucks involvedonly prestige having name program pub lished printed booka free copy will receive uses program its pages Some bits pieces old workbench After youve fitted wheels axles trimmed axles flush outside edge wheel collars break Out solder ing iron/torch Remove wheel collars solder bit tin-can metal covers end collars brass take solder well Trim outside tin bits youll have what looks like scale hub cap better mechanical viewpoint tin cover keeps jamming wheel collars too far onto axleand binding normal free running wheels Malting plywood out plywood may sound kind dorky thats sure havent tried wont know strong What Im suggesting course use thin plywood go laminating curved parts next Giant Laminating strips wood around form way produce lightest strong est wing tips tail feather outlines possible Next time get lamination use Ms-in ply wood strips instead balsa Big Bird Unless curves extreme theres no need soak plywood hot water theres advantage using plywood over balsayou can cut longer strips 48-in sheet can softer wood event use relatively slow-drying white aliphatic resin glue laminating plywood strips applying spreading glue try keep having glue voids wrap ply lamination tightly around pack Give whole stack week dry thoroughly sand laminated part final size Im sure youll very impressed strength stability construction responding advertisers mention read about Model Aviation Electric model-building facility moved out apartment house now has space promising some unbelievably large Electrics Keith tells hes got biggie boards right nowso watch out 1988 Electric Fly goers Keith did send along new address asked include Keith Shaw 2756 Elmwood Ann Arbor MI 48104-6624 Part recent conversation Keith led some reflections 1987 Electric Fly Cover age meet appeared January 1988 sue MA included statements about increased use higher-power systems corresponding increased performance both pi lots planes Some months photos show what mean As generalization faster dramatic flight performances also shorter flight per formances because associated high power lev els drain battery faster Keith well-known sizzling aerobatic flight performances among other things spoke flight intensity sorts sheer thrill such highest levels performance de manding engrossing pilot doesnt feel flight short fact may feel flight long Hummm think what may have new Law Pro fessor Keith Ill dare dub Keiths First Law Fun Faster seems longer youre holding stick Well can tell firsthand youre holding stick GS 02GS 03 2656346 GRATE-SHAPESTM SANDING BLOCKS Long lasting silicon carbide grit sides 10 Long GS 101 1/4 & 3/6 Combo package #1-GS 101 102 103 $1195 S&HSAVE Six Pack Combo- GSa above $2195 S&H Single GS $495 S&H AZ RESIDENTS ADD 55k TAX products guaranteed ers invited Ask hobby dealer tlrat SEND CHECK OR*\XMASTER CHARGE MONEY ORDER TOOR VISA ACCEPTED Bell Rock Industries6466 Hwy 179-Suite 108 Sdona AZ 66336 1602 2841806 GRATE-SHAPESTM ROUNDS GS 200 PKG 9 long$795 S&H GS 104GS 105GS 106 318 & 518 900 Vs w1518 450 6900 Combo package #2-GS 104 105 106 $1195 S&H GRATE-S HAPESTM SQUARES GS 300 PKG 9 long$495 S&H April 1988 145 RC Giant Scale/de VriesRC Electrics/Kopski Continued page 49Continued page 51 otherwise witnessing kinds flights same law holds true Beyond just beginning Over years mail Ive received has readers want get started Electric majority modelers want economically other extreme can recall perhaps two three letters topic interest FAI Electric event As result dominant reader interest have over years devoted much column space addressing beginner Now Id like move up bit address next pop ular question What next quite honestly what Im about get con tinue next month would serve perfectly well just beginners toodepending intent interest resources thinks safe say popular Electric power systems using up sev en cells six seven cells topping pop ularity charts easy understand cause so-called 05 Yuk hate kind nomenclature motors available ranging economy can types very impressive cobalts also low-cost chargers available associated batteries techni cally quite easy charge such packs dinary auto battery going 05 route just seems like natural approach firsttime Electric getting under seven-cell ceiling easy understandable also rather con fining place Going beyond seven cells op ens up whole new world practical power levelsand plane/performance combinations readily attainable smaller packs folks have enjoyed saturation first 05 systems begin asking What next imme diately focus chargers thats what next begins Generally first questions back quiring folks have own feelings outlook toward future Electric modeling lives person feels Electric will always play partand especially its partI immediately give strong encouragement getting high-capability charger Buying charger capable charging seven cells immediately puts faceto-face investment thats beyond $100 some very serious matter way see burning up about eight 10 gal lons glow glop about same cost hav ing nothing show except greasy clothes its gone falr complete must also say charging larger packs large investment entirely possible simply breaks up larger battery smaller packs cells can individually charged economy charger practice best done having smaller packs fitted connectors plug both charger wiring harness model latter harness configured individual packs connected series appear motor single battery cells has offered commercially Astro example 12-cell battery 15 made up two six-packs technically doable disconnect ing/connecting operation messy royale payne quickly tires An intermediate-cost-level approach con struct simple high-capacity charger such presented columns May June 1985 issues easily made charging sys tem based standard six- seven-cell econ omy charger some readily available parts 146 Model Aviation supplies can charge 18 cells time no disconnecting/connect ing encourage larger-system tentions find back issues see what Im talking about slickest approach remains commercially made high-capability chargers Among Robbe Automax Astro Model 102 popular recent KRC Electric Fly As soon has own approach dealing above-seven-cell charging challenge squared away next step decide what bigger power system consider sense just tough problem now charging limitations Out picture varied larger-system choices lie out tempt tease Choosing wisely automatically requires have some idea about what youd like fly course just much additional money wish invest Personally very much like 15-size motors have six geared find very versatile have seen flown seven 14 cellswith prop er plane/prop choices courseand perhaps best next cost-step beyond 05 category course also fly 25s 40s Like said ole new world uture columns See also MA April 1985 Electric competition rules new 1 988-89 AMA Competition Regulations Book out available AMA sending little card came packaged renewed AMA license can get just sending letter also Anyway book unique first time Regulations book contains AMA Electric rules bona fide unified format way back book theless can tell lots folks worked very hard sometimes emotionally establish very first rules know parts satisfactory personsincluding myself thats life know no knows thing until see Almighty participating flight line Im perfectly content intend supportive what have work now Im encouraging everyone like wise view first-time Electric rules what workable start put use local areas experience results drop line tell reactlon Ill maintain informal compilation inputs couple years its time review/revise AMA rules again Ill publish summary inputs above operative word USE ones have never forgetting before just beginning Silentiusmore December 1987 column briefly discussed local modelers grand suc cess Hobby Lobby/Graupner-powered Silentius Since Ive enjoyed friendly let ter Jim Martin HL Jim tells has opportunity fly Mr G friends noted doing much better finding staying weak thermals Jim noticed others flying split sticks rudder stick elevator other general werent touch ing elevator stlck Jim went say forced himself resist temptation wiggle own elevator stick presto model did much better its own Well Im familiar feeling Im hoping sharing offer ing will get longer flights too Continued page 152 RC Electrics/Kopski Continued page 146 Thanks Jim input insight Incidentally local modeler just complet ing HL Electric Pronto should have some inputs future columns Electric supplies continue available CS Flight Systems recent conversation owner/Electric modeler Charles Sylvia learned continuing expansion catalog updates latest discounted Electric supplies send two bucks Charlie CS Flight Systems 31 Perry St Box 775 Middleboro MA 02346 Tell em Bob sent ya must close another column singular frustration writing column low ceiling column size have far share can get print month Please forward comment question SASE please address listed very top column FLASH Just announceda new Electric kit Guillow Its Aeronca designed Woody Blanchard Woody chaired committee re sponsible first-ever AMA Electric rules discussed above 530-sq-in 67-in-span kit OSs should available about time read RC Old-Timers/Mathews Continued page 53 events has obviously worked Out well since own local SAM chapter has several flying Eut has now developed obscureand certainly structurally complexflying wing named simply Gross Wing after its designer Things get bit odd photo ap pears January 1942 Air Trails con struction article published until January 1948 postwar article design al tered include fuselage-mounted rudder ever Bernard Gross states 1948 Air Trails article original 1941 wing used basis Eut has utilized 1942 pho fuselage rudder planform has com bined airfoils outline 1948 version Whether design has au thenticated know time writing Longtime friend Bill Baker has taken over Free Flight Old-Timers column magazine challenged explain new SAM rules RC No way Baker figure will least year before jail-house lawyers have worked way through contradictions What will use Eut Tilestons latest project point Out some major changes SAM rules refer modelers really interested new SAM rule book Eut has scaled Gross Flying Wing up 675 sq wing area meet SAMs 225-sq-inper- 10-cu-in-of-displacement rule makes legal 30 cu two-cycle power plant Eut used Enya 46 four-stroke un der old rules classified according 60% its displacement 60% 46 cu However under new rules model now illegal since four-cycle engines classified ac cording full displacements As built Euts Gross Wing spans 84 152 Model Aviation FIBERGLASS PARTS WET Y SAFE OXY unique two-component epoxy laminating system developed offer user safest highest quality laminating resin available VA Pt Kit-S140O 1V2 Qt Kit-$210O Glass Cloth 58 oz/sq yd 38x6ft-$90038xl5ft-S190O 38 x30 ft $3500 add $250 Ship 8 Hand above items Send SASE additional information ACPs Ughtweight Composite Materials Order COD Send Check Money Order AEROSPACE COMPOSITE PRODUCTS P0 Box 16621 IDept Al Irvine CA 92714 Source Lightweight Materials Over 237 Cowls kit scratch built models Also over 34 round cowls ranging 4 14-7/8 diameter 55 diff size 8 shape wheel pants custom Make Parts Vacuum Form Canopies P1gm wud $1 couplet kt T&D FIBERGLASS SPECIALTIES 30925 Block Dept 4 Garden City Ml 48135 PHONE 1313421-6358 BRAZED & HEAT-TREATED WIRE GEARS & CASANES PHONE 3131 261-9064