AN EVENT Electric fliers look ward Second Annual Electric Fly-In Winston-Salem NC Radio Control Club Inc announced column last month just received additional information August 20-21 meet First CD Charles Spear 288 Holly Lane Mocksville NC 27028 Ive met Charles KRC meet hes fine person know should fine meet write him can get mailer includes meet descrip tion detailed map field called Thrift Field located Advance NC Meet activities include prizes Most Aer obatic Beauty Events latter flying things think Frequency qualifying will take place Saturday All-Up/Last-Down event Sunday winner activity goes home 50 bucks watch Out John Mount joy Other particulars meet include transmitter impound frequency control pins flight line charging on-field assistance bring Electric questions troubles refresh ments rest facilities nearby motels camp sites casual relaxed atmosphere Now can ya beat write Charlie tell im Bob sent ya did go Im able get model magazine month over period time get sample Its pretty ob vious Electric enjoying rapid growth clearly evidenced steady increase maga zine ads Electric kits other products Yet time about two years ago five popular monthlies carried regular dedicated Electric columns now looks like two still print Model Builders course Model Aviation s unbelievable paradox simul taneous growth decline Can anyone Out explain Since Ive just asked help matter may well ask help another concerns some Electric rules reader Califor nia sent copy some Electric Old-Timer rules developed some cooperating SAM groups As written particular rules form basis 1988 interim Elec tric power rules review will conducted 1989 evaluate rules suitability Now rules quite some rules indeed Some stipulate normal SAM require ments regarding model suitability other nor mal things like minimum wing loading some fanciful specifics like def 48 Model Aviation Radio Control 0 Electncs Bob Kopski 25 West End Dr Lansdale PA 19446 Killing two birds stone Leisure ferrite 05 motor has equipped Astro 4046 gear drive unit order provide means maintaining proper clearance between gears front end bell motor aluminum-plate shim has sandwiched between gearcase motor shims dimensions extended enough could also used bolt motor nose Amptique Author Bob Kopski has information about setup column month Kopaki finally got around building Astro Challenger before its first flight Top wing rubberbanded prop K&W 13 x 7 wIth large hub option folder motor cobalt 05 using seven 800-mAh batteries RC via Ace Silver Seven receiver Charlies ser vos An RJM OnlOff switch controls juice All-up weight 44 oz Bob cant build plain has improve thingslike wing struc ture two photos above R center section has beefed up stub spars spruce balsa shear webs glued between against sides main spars Additional balsa TE sheeting has added root area plywood plate protects structure rubberband hold-downs Construction elliptical tips 1 eased using laminated spars leading edge stock inition production 05 motor thus Frame size 35mm diameter 49mm long maximum Armature displacement 95cc maximum Must have three-bar commutator unusual stuff too Beyond similar different specifications nonferrite motors like made unobtainiumsee column April 87 issue MA Now believe heart Ive gotta LAST GUY field anywhere else deny anyone Electric fun surely dont understand fun rationale behind kinds rules What strange know SAM folks general super modelers know personally rank finest peo ple Ive met just cant figure out funloving folks would want such anguishing rules Therefore right now Im asking ANYONE can explain situation kindly write en lighten Ill pass good information along future column everyone can share reasoning may just something thats really neat generally unknown fairness must say made exactly same request same subject back August 85 issue earlier OT rules proposals creative like counting gear teeth got no thats ZERO reader feed back suspect nobody could explain Maybe Ill luckier time Meanwhile readers interested participating sort regimen can disassem ble motors immerse armatures suit able liquid contained calibrated glassware just like high school physics determine displacement see legal Ab Continued page 140 DISTRIBUTED BY 7550 5o GbrieI 5od ero CA 53422 806 455-1717 unusual tools borrowed JeweIry izunsmiuung Clock Making professional Making trades NOW AVAILABLE TO YOU BY MAIL guaranteedI II II Use coupon send name address $100 MICRO MARK 340-559 Snyder Ave eley Heights NJ 07922 ENAME ADDRESS L E ZIPJ m August 1988 49 Good news Commercial motor mounts Electrics above cast-aluminum item JT-EL1 JTec fits wide range motors 05/075 ferrites 15-size cobalts say looks like John Tatone gas-engine mount should John now JTec Lightweight glass-filled nylon unit shown below comes Sonic-Tronics Adjustable-width fea ture makes fit motors smallest largest Motor retained nylon tiewraps Weight 04 oz price $495 $975AVAILABLE AT AMERICAS$525 FINEST HOBBY SHOPS ZNDUDTflZND Over 1000NEW Catalog FROMI MicroMark Small Tool SpecialistsU FULL BODY PILOT KIT Contains pilot head handa boota helmet cap goggles full templates easy instruc tions Easy assemble finish Some simple sewing required Fully positionable too Prke #2061/6 scale 895 #205-Vs scale 995 #204-/6 scale1095 #2031/3 scale1695 DARNED GOOD AIRMEN Lightest pilots available Lifelike vinyl latex rubber Build Sportsman Barnstormer Full Body Bust - BUST PILOT KIT Contains pilot head helmet sport cap goggles jacket Easy assemble finish Ptoe #108-A scale NEW 595 #106-V6 scale695 #l05-Vs scale #104- scale. 895Some #103-V3 scale 1495 S mp e sew ng equ ed can estimate long should take pump up pack Just divide nominal capac ity hy charging rate multiply result 60 minutes/hour Simplifying math 3% cell capacity mAh equals charge time minutes 03 x mAh ge time minutes times interest Ni-Cds mAh 250 500 900 1200 minutes7515 2736 Lead-acid cells gel-cells Ah612 hours3 6 So use watch monitor long charging has going charger has shut off early push Start button again worried about overcharging feel pack cool safe push Start ton fact time pack cool VR light isnt glowing push Start button Ace R/C Overnighter set Ni-Cd charging instructions says same thing Charge 24 hours using charger provided before using device charge overnight 14 hours least monthly necessary advice because Ni-Cd cells have form abil ity hold charge happens slowly can successful fast charger af ter cells have formed So does leave TRC times want Set forget ie slow charge overnight dont want sit stopwatch mon ttor charging process times am bringing along palm-sized Ace R/C Over nighter plugs vans 12-VDC cigar lighter side two transmitters two receiver packs other Charging pro ceeds 14-hour rate whether van engine running stopped can useful cause TRC Fast Charger instructions specifi cally prohibit use engine running Overnighter voltage-regulated constant-current charger can internally programmed charge battery packs mAh ratings 250 500 900 1200 takes almost no room contained rugged metal case tt gets job done What can ask Ace R/C Overnighter kit 34K50 $2495 assem bled unit 34K50C $3395 Ace R/C Inc Box 51 IE Higginsville MO 64037 816 5847121 know what thinking now handle special charging plugs Very simple cut off put back JET PILOT KIT Pilot has molded jet helmet Contains face mask oxygen hose Estreme ly Realistic Weighs less oz P616 #308/ scale 595 #307-/ scale 695 ORDERING INSTRUCTIONS See dealer first order direct Add $100 shipping NYS residents add 7O/ tax Send check money order CODS OK Send $100 catalog Deans connectors available Ace R/C above have take along special connectornot whole 110VAC charger monitor whats going have Accu tach 2A described column April 1988 issue universal adapter Ugly Octopus described column March 1982 issue electronic repairs Ill carry Portasol soldering iron see February 1988 co lumn Well thats month know what plan about charging batteries Dont expect quick answers letters next few months because wont receiving mail sold house son Im off see world See Dealer add Dollar direct Ofder handling Throwing blade can real disaster due danger thrown blade also damage air plane would caused enormous vibration would result Substantial tor sional stresses encountered propel ler largely hub due great torque variations single-cylinder engines worse four-cycle engines poorly designed prop bomb wait ing go off advice keep eye open local hobby shop watch magazine ads manufacturers jump bandwagon offer quieter now sought-after multi bladed props Multi-Blade Props/AbbottRC Electrics/Kopski Continued page 46Continued page 49 lers various numbers blades di ameter two blades 25 Dn/D2 n er blades D2diameter two-bladed prop Dn eter prop n blades Plugging numbers expression provides values given table Whats available great majority commercially available props two bladed variety four major prop manufacturers known offer three bladed props Grish Tornado Cox Graupner make plastic/nylon props Zen gali makes black fiber-filled variety smaller sizes wooden props larger sizes Cox offers small three-bladers 51 range Grish offers three-bladers sizes up 10 Graupner offers larger props starting 9 going up 16 Zengali currently offering fiberfilled three-bladed props sizes 8 9 10 x 6 lOx 75 10 x 8 wooden threeor four-bladed props range diameter 13 28 Check local hobby shop find out whats currently available Its out question make own three- four-bladed props better really know what doing heck second thought just drink stuff glassware insteadits gotta fun Some Electric trivia brought mind looked back August 85 issue above reference column contained photo Astro Flights Bob Bouchers then-new Challengera very competent Electric Sailplane happens just finished flew new Challenger two days ago brought back viv id memories Bobs Bob brought 1984 KRC Electric Fly Yup way California gave opportunity fly fair Bob course because night before called desperation after just arriving East Coast seems Challenger found full-scale skies less friendly wing wound up some tears Mono Kote late Friday night evening before meet Bob very much needed some red transparent film patch things up Luckily brand new roll able accommodate Bob wing Jim ZarembskiRCM former Electric columnist too shop Now happens that roll MonoKote few square inches missingsaw no further use til last week Thats cover ing new Challenger Yup West Coast Bob East Coast Bob now have Challenger wings covering exactly same roll Mono Kote Hows some Electric trivia Anyway has explosion sorts Challenger population locality dur ing past six months effect went four during period 140 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $20000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 being fourth As result now have access lots Challenger thoughts experiences hints pass along future columns now Ill just say four presently outfitted geared cobalt 05s Ugh Theres detestable description again seven-cell packs various electrical capacities swing ing various sizes K&W folding props configured easily accessed vari able motor mount very versatile battery compartmentspecifically done could play variety power systems Thus time goes along hope have more infor mation pass along simple useful offering can make Challenger four locals turned out bit nose-heavy might keep mind arrange radio installation posi tion much aft possible Finally before leaving subject bit Electric trivia have built Challenger kits no doubt saw photos kit instruction manual manual written after 84 KRC meet some photos therein taken meet can tell very assuredly plane pictured defi nitely flies very well cause said above flew Astro 4046 gear drive 02/035 motors enthusiastically described March June 88 columns latter reference discussed some detail approach pinion gear re moval replacement turns out Mitch Poling Model Builders Electric Power colum nist also has some good words say about drive May 88 issue MB Mitch also offers something can make pinion gear removal lot simpler particular refers gear puller made BoLink ma jor supplier model car enthusiasts Mitch says $7 Model BL 6014 puller does good job well worth money Write BoLink 420 Hosea Rd Lawrenceville GA 30245 might also try hobby stores catering model cars have seen product Mitch says its good its good youre reading Electric column MB should June 88 column also discussed mounting drive OSs using shim properly space motor drive housing proper gear mesh photos month illustrates modeler used required shim also mount motor material used square aluminum about 30 40 mils thick suit able cutouts clear motor shaft screws etc sandwiched between gear drive housing motor front-end bell metal plate screwed onto Amptique firewall Neat similar mounting method used cobalt 15 its gear drive pictured column February 1987 Some motor/propeller performance data Last months column offered some motor performance data six cobalt iSs using direct drive month Id like offer some static per formance data cobalt geared OSs 15s different sizes folding props recently took data deciding what motor stall first new Challenger technically inclined please refer last months column discussion take such data everyone general formation can offer guidelines should wish use motor/prop combinations Two comments order First props used assembled large K&W hub shorter-hub optionwhich effec tively reduces diameter little listedis also available Second data below taken neutral motor-brush timing GEARED COBALT 05 WITH K&W FOLDING PROP PROPVOLTSAMPSRPMPWR IN X 1000watts 11 x 7457123 456 5271534581 591185106 66521355142 12 x 74041163547 475148470 5411774596 6182155132 GEARED COBALT 15 WITH K&W FOLDING PROP PROPVOLTSAMPS 12 x 7 814 906 1027 1145 13 13x781 925 1048 1174 1317 15x7913 104 RPM x 1000 78 16 1 78 5 35 15855 1966 1474 18545 thenDISASTERI PWR IN watts 63 84 119 161 231 67 97 136 185 258 134 192 Nowabout last data entry 15 Ive run lot motors props 16-plus years Electric modeling never have happen have what consider pretty sturdy heavy motor test stand Ive run Continued page 144 nis ala rlmer IS perfectly proportioned modeling Curtiss Robin 049 EngInes -Channel RIC 41 WIngspan ElectrIc Power Optional sazsa Ku Very few full scale aircra5 ideally suited model flight us appealing old Curtiss Robin burn spruce linen age beautifully proportioned rubber electric glow engines Easy fon build trainerlihe performance Flyline Models Catalog 555Pfsnn 17031 2739503 INE MODELS INC PO Box 2135 FaIrfax VIrginia 22031 USA August 1988 141 SYNTHETIC WBRICANTS CASTOR WBRICANTS NITRO AIJOITIVES FREE CATALOG L TIPS INCLUDES TEFO & PRODUCT 800-242-0489 c0rtn4~5 nh nto 2 9 400489 ... Control Line Products Modelers serving Madelers Adiustable Sadder Horns troltines 4 HeanyttntyBellcranks~Handles Sdiustahle teadouttuides tslk Hardearn Custom Motor Mounts aith much mere Aluminum Inserts UHSUHPASSED QIIALIIIOUSHAHTStD SAIISFSCIIAN Write igAo receive ourlilt catalog Send name address Craftanlan Models InC 3 5 161sf Westfield redact 46074 dea e oqatries neited TWINS ARE CLASSIC AND AFFORDABLE Looking inexpensive opposed twin replace shaking smelly gas burner want scale like appearance smooth running 2 cycle glow operation Yes its back basics EHS Tradings Twin Star Comments .Have lot engnm no doubt thus u probaily best Bill Thomas Lake Havaau AZ .The Twin Star osceptionaiJy smooth engne thus displacement size Clarance Lee ENGINE EDITOR RCM MAGAZINE answer question often asked muffler availabler Wes muffler & header available CALL FOR INFORMATION EHS TRADING LTD 400 HUALANI ST BLDG 13E HILO HAWAII 96720 RC Electrics/Kopski Continued page 141 some motors power levels considerably ex cess whats shown never did test stand yield before time running 15 x 7 past 4500 rpm level pulled entire test stand over destroyed prop blades Talk about thrust dont know much thrust was BIG Anyway got new blades sure nice able get replacement parts Im gonna pursue further now youll have satisfied data have table information can useful sev eral ways First suggest graph grid pa per some parameter combinations such voltage axis rpm other voltmeter tach can easily see own system compares data guideline fact can fairly good job voltmeter Just assume voltage actually reaching motor about 10 11 volts per cell Multiplying num ber cells will give predicted rpm range voltage/rpm graph course other combinations information such curves power rpm can plotted Graphing real eye-opener Notice just little change rpm corresponds large change power ever wondered just few rpm made such difference flight performance reason true Gas-flying friends Rubber fliers too Next month special issue Sep tember 1988 Model Aviation represents fifth year association magazine has truly enjoyable ex perience both working good folks MA sharing Electric information fun light goes well expect deviate normal column format bit offer something little special next month Please forward comment question SASE please author address given very top column keep fingers away large fiberglass folder blades cause though dont need flip-start Electrics its generally useful keep 10 Chief Modelmaker Above put hand 1 -800-63HOBB V 808 935-9009 HAWAII STD TIME 10 AM-7PM Mon-Sag RC ScalelWischers Continued page 53 develop construction drawings first item list Scale modelers attributes namely pati ence must strong points hit/her makeup Almost same classbut quiteis person would like Scale model air craft hasnt done beforedifferent necessarily obscure own experience have yet run out subjects pub lished three-view drawings semiobseure types need really deep research hasnt yet occurred one-of-a-kind aircraft didnt remain obscure once modelers got hold design data Benny Howards racers example modeler chooses extremely com plex prototypemutiengines multiwings endless external detail struts rigging elab orate color schememust motivated limit project becomes infinite boring Kits type model rare Construction drawings can sometimes found much sup plementary data needed complete truly Scale airplane therefore large amounts re search must undertaken go see really super-Scale air craft models time World Championship Scale competition place see best Nats also rated highly other event attracted top-quality models especially FM class too few Sport Scale class theNats has re cently attracting modelers high-quality airplanes could flown FM class competitors chose has shift builders fine Scale aircraft away contests toward gather ings such Scale rallies recent years best have seen meets Merritt Zimmermanas A-scale DH Moth example being completely scale respect including handmade four-cylinder four-stroke engine being custom-designed custom-built Other examples Bob Nelitzs Piper J-3 Tay loreraft clipped-wing Bucker Jungman A-scale Models large size enable exact detailing need work under magni fier Currently aircraft seen Scale ral lies Toledo represent state-of-the-art Scale modeling What aweinspiring masterpieces flown scalelike manner closet queens appear shows prizes ribbons oniy certainiy confused glitter seen 00 Without Muffler large shows represent upper crust route ascent simple Scale model originating kit scratch-designed -built models surpass alland fly realistically top off assumes creators elegant air craft somehow different average modeler need describe backgrounds Dissatisfaction runs high makeup successive product oniy surpassed next using knowledge acquired Accumulated ex perience techniques general know constantly being updated isnt surprising find relationships such father/son engaged collecting knowledge frequently find modeler has connections full-size aviation activity People know airplanes often top modelers Scale flying An incident will cause minor damage trainer-type model can catastro phe Scale model tells us flight dis cipline important Scale flying stakes 144 Model Aviation 40 CC124 CU IN IMPACT ENGINEERING PROUDLY ANNOUNCES THAT OUR FULL PRODUCT LINE IS NOW CARRIED DY GREAT PLANES DISTR Iii KIj I-u LINE SYSTEMS PO Box 1502 Lewiston 04241 [12 Volt Winches responding advertisers mention read about Model Aviation W0flLOS SIOGESO SCALE PEOTO SEPV06 600 P10r0 PA0OS PLANS 3 VtEWS PHOTO-PACKS PLANS ENLARGING SASE EOErSng 00w JIo Pepiros Catatog $t- 00 60 SCflLF PlANS PHOTO SEOUIC[ 3209 Mdson Geeosboo Nc 27403 PSOoP (9192925239 No CoIleC
Edition: Model Aviation - 1988/08
Page Numbers: 48, 49, 140, 141, 144
AN EVENT Electric fliers look ward Second Annual Electric Fly-In Winston-Salem NC Radio Control Club Inc announced column last month just received additional information August 20-21 meet First CD Charles Spear 288 Holly Lane Mocksville NC 27028 Ive met Charles KRC meet hes fine person know should fine meet write him can get mailer includes meet descrip tion detailed map field called Thrift Field located Advance NC Meet activities include prizes Most Aer obatic Beauty Events latter flying things think Frequency qualifying will take place Saturday All-Up/Last-Down event Sunday winner activity goes home 50 bucks watch Out John Mount joy Other particulars meet include transmitter impound frequency control pins flight line charging on-field assistance bring Electric questions troubles refresh ments rest facilities nearby motels camp sites casual relaxed atmosphere Now can ya beat write Charlie tell im Bob sent ya did go Im able get model magazine month over period time get sample Its pretty ob vious Electric enjoying rapid growth clearly evidenced steady increase maga zine ads Electric kits other products Yet time about two years ago five popular monthlies carried regular dedicated Electric columns now looks like two still print Model Builders course Model Aviation s unbelievable paradox simul taneous growth decline Can anyone Out explain Since Ive just asked help matter may well ask help another concerns some Electric rules reader Califor nia sent copy some Electric Old-Timer rules developed some cooperating SAM groups As written particular rules form basis 1988 interim Elec tric power rules review will conducted 1989 evaluate rules suitability Now rules quite some rules indeed Some stipulate normal SAM require ments regarding model suitability other nor mal things like minimum wing loading some fanciful specifics like def 48 Model Aviation Radio Control 0 Electncs Bob Kopski 25 West End Dr Lansdale PA 19446 Killing two birds stone Leisure ferrite 05 motor has equipped Astro 4046 gear drive unit order provide means maintaining proper clearance between gears front end bell motor aluminum-plate shim has sandwiched between gearcase motor shims dimensions extended enough could also used bolt motor nose Amptique Author Bob Kopski has information about setup column month Kopaki finally got around building Astro Challenger before its first flight Top wing rubberbanded prop K&W 13 x 7 wIth large hub option folder motor cobalt 05 using seven 800-mAh batteries RC via Ace Silver Seven receiver Charlies ser vos An RJM OnlOff switch controls juice All-up weight 44 oz Bob cant build plain has improve thingslike wing struc ture two photos above R center section has beefed up stub spars spruce balsa shear webs glued between against sides main spars Additional balsa TE sheeting has added root area plywood plate protects structure rubberband hold-downs Construction elliptical tips 1 eased using laminated spars leading edge stock inition production 05 motor thus Frame size 35mm diameter 49mm long maximum Armature displacement 95cc maximum Must have three-bar commutator unusual stuff too Beyond similar different specifications nonferrite motors like made unobtainiumsee column April 87 issue MA Now believe heart Ive gotta LAST GUY field anywhere else deny anyone Electric fun surely dont understand fun rationale behind kinds rules What strange know SAM folks general super modelers know personally rank finest peo ple Ive met just cant figure out funloving folks would want such anguishing rules Therefore right now Im asking ANYONE can explain situation kindly write en lighten Ill pass good information along future column everyone can share reasoning may just something thats really neat generally unknown fairness must say made exactly same request same subject back August 85 issue earlier OT rules proposals creative like counting gear teeth got no thats ZERO reader feed back suspect nobody could explain Maybe Ill luckier time Meanwhile readers interested participating sort regimen can disassem ble motors immerse armatures suit able liquid contained calibrated glassware just like high school physics determine displacement see legal Ab Continued page 140 DISTRIBUTED BY 7550 5o GbrieI 5od ero CA 53422 806 455-1717 unusual tools borrowed JeweIry izunsmiuung Clock Making professional Making trades NOW AVAILABLE TO YOU BY MAIL guaranteedI II II Use coupon send name address $100 MICRO MARK 340-559 Snyder Ave eley Heights NJ 07922 ENAME ADDRESS L E ZIPJ m August 1988 49 Good news Commercial motor mounts Electrics above cast-aluminum item JT-EL1 JTec fits wide range motors 05/075 ferrites 15-size cobalts say looks like John Tatone gas-engine mount should John now JTec Lightweight glass-filled nylon unit shown below comes Sonic-Tronics Adjustable-width fea ture makes fit motors smallest largest Motor retained nylon tiewraps Weight 04 oz price $495 $975AVAILABLE AT AMERICAS$525 FINEST HOBBY SHOPS ZNDUDTflZND Over 1000NEW Catalog FROMI MicroMark Small Tool SpecialistsU FULL BODY PILOT KIT Contains pilot head handa boota helmet cap goggles full templates easy instruc tions Easy assemble finish Some simple sewing required Fully positionable too Prke #2061/6 scale 895 #205-Vs scale 995 #204-/6 scale1095 #2031/3 scale1695 DARNED GOOD AIRMEN Lightest pilots available Lifelike vinyl latex rubber Build Sportsman Barnstormer Full Body Bust - BUST PILOT KIT Contains pilot head helmet sport cap goggles jacket Easy assemble finish Ptoe #108-A scale NEW 595 #106-V6 scale695 #l05-Vs scale #104- scale. 895Some #103-V3 scale 1495 S mp e sew ng equ ed can estimate long should take pump up pack Just divide nominal capac ity hy charging rate multiply result 60 minutes/hour Simplifying math 3% cell capacity mAh equals charge time minutes 03 x mAh ge time minutes times interest Ni-Cds mAh 250 500 900 1200 minutes7515 2736 Lead-acid cells gel-cells Ah612 hours3 6 So use watch monitor long charging has going charger has shut off early push Start button again worried about overcharging feel pack cool safe push Start ton fact time pack cool VR light isnt glowing push Start button Ace R/C Overnighter set Ni-Cd charging instructions says same thing Charge 24 hours using charger provided before using device charge overnight 14 hours least monthly necessary advice because Ni-Cd cells have form abil ity hold charge happens slowly can successful fast charger af ter cells have formed So does leave TRC times want Set forget ie slow charge overnight dont want sit stopwatch mon ttor charging process times am bringing along palm-sized Ace R/C Over nighter plugs vans 12-VDC cigar lighter side two transmitters two receiver packs other Charging pro ceeds 14-hour rate whether van engine running stopped can useful cause TRC Fast Charger instructions specifi cally prohibit use engine running Overnighter voltage-regulated constant-current charger can internally programmed charge battery packs mAh ratings 250 500 900 1200 takes almost no room contained rugged metal case tt gets job done What can ask Ace R/C Overnighter kit 34K50 $2495 assem bled unit 34K50C $3395 Ace R/C Inc Box 51 IE Higginsville MO 64037 816 5847121 know what thinking now handle special charging plugs Very simple cut off put back JET PILOT KIT Pilot has molded jet helmet Contains face mask oxygen hose Estreme ly Realistic Weighs less oz P616 #308/ scale 595 #307-/ scale 695 ORDERING INSTRUCTIONS See dealer first order direct Add $100 shipping NYS residents add 7O/ tax Send check money order CODS OK Send $100 catalog Deans connectors available Ace R/C above have take along special connectornot whole 110VAC charger monitor whats going have Accu tach 2A described column April 1988 issue universal adapter Ugly Octopus described column March 1982 issue electronic repairs Ill carry Portasol soldering iron see February 1988 co lumn Well thats month know what plan about charging batteries Dont expect quick answers letters next few months because wont receiving mail sold house son Im off see world See Dealer add Dollar direct Ofder handling Throwing blade can real disaster due danger thrown blade also damage air plane would caused enormous vibration would result Substantial tor sional stresses encountered propel ler largely hub due great torque variations single-cylinder engines worse four-cycle engines poorly designed prop bomb wait ing go off advice keep eye open local hobby shop watch magazine ads manufacturers jump bandwagon offer quieter now sought-after multi bladed props Multi-Blade Props/AbbottRC Electrics/Kopski Continued page 46Continued page 49 lers various numbers blades di ameter two blades 25 Dn/D2 n er blades D2diameter two-bladed prop Dn eter prop n blades Plugging numbers expression provides values given table Whats available great majority commercially available props two bladed variety four major prop manufacturers known offer three bladed props Grish Tornado Cox Graupner make plastic/nylon props Zen gali makes black fiber-filled variety smaller sizes wooden props larger sizes Cox offers small three-bladers 51 range Grish offers three-bladers sizes up 10 Graupner offers larger props starting 9 going up 16 Zengali currently offering fiberfilled three-bladed props sizes 8 9 10 x 6 lOx 75 10 x 8 wooden threeor four-bladed props range diameter 13 28 Check local hobby shop find out whats currently available Its out question make own three- four-bladed props better really know what doing heck second thought just drink stuff glassware insteadits gotta fun Some Electric trivia brought mind looked back August 85 issue above reference column contained photo Astro Flights Bob Bouchers then-new Challengera very competent Electric Sailplane happens just finished flew new Challenger two days ago brought back viv id memories Bobs Bob brought 1984 KRC Electric Fly Yup way California gave opportunity fly fair Bob course because night before called desperation after just arriving East Coast seems Challenger found full-scale skies less friendly wing wound up some tears Mono Kote late Friday night evening before meet Bob very much needed some red transparent film patch things up Luckily brand new roll able accommodate Bob wing Jim ZarembskiRCM former Electric columnist too shop Now happens that roll MonoKote few square inches missingsaw no further use til last week Thats cover ing new Challenger Yup West Coast Bob East Coast Bob now have Challenger wings covering exactly same roll Mono Kote Hows some Electric trivia Anyway has explosion sorts Challenger population locality dur ing past six months effect went four during period 140 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $20000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 being fourth As result now have access lots Challenger thoughts experiences hints pass along future columns now Ill just say four presently outfitted geared cobalt 05s Ugh Theres detestable description again seven-cell packs various electrical capacities swing ing various sizes K&W folding props configured easily accessed vari able motor mount very versatile battery compartmentspecifically done could play variety power systems Thus time goes along hope have more infor mation pass along simple useful offering can make Challenger four locals turned out bit nose-heavy might keep mind arrange radio installation posi tion much aft possible Finally before leaving subject bit Electric trivia have built Challenger kits no doubt saw photos kit instruction manual manual written after 84 KRC meet some photos therein taken meet can tell very assuredly plane pictured defi nitely flies very well cause said above flew Astro 4046 gear drive 02/035 motors enthusiastically described March June 88 columns latter reference discussed some detail approach pinion gear re moval replacement turns out Mitch Poling Model Builders Electric Power colum nist also has some good words say about drive May 88 issue MB Mitch also offers something can make pinion gear removal lot simpler particular refers gear puller made BoLink ma jor supplier model car enthusiasts Mitch says $7 Model BL 6014 puller does good job well worth money Write BoLink 420 Hosea Rd Lawrenceville GA 30245 might also try hobby stores catering model cars have seen product Mitch says its good its good youre reading Electric column MB should June 88 column also discussed mounting drive OSs using shim properly space motor drive housing proper gear mesh photos month illustrates modeler used required shim also mount motor material used square aluminum about 30 40 mils thick suit able cutouts clear motor shaft screws etc sandwiched between gear drive housing motor front-end bell metal plate screwed onto Amptique firewall Neat similar mounting method used cobalt 15 its gear drive pictured column February 1987 Some motor/propeller performance data Last months column offered some motor performance data six cobalt iSs using direct drive month Id like offer some static per formance data cobalt geared OSs 15s different sizes folding props recently took data deciding what motor stall first new Challenger technically inclined please refer last months column discussion take such data everyone general formation can offer guidelines should wish use motor/prop combinations Two comments order First props used assembled large K&W hub shorter-hub optionwhich effec tively reduces diameter little listedis also available Second data below taken neutral motor-brush timing GEARED COBALT 05 WITH K&W FOLDING PROP PROPVOLTSAMPSRPMPWR IN X 1000watts 11 x 7457123 456 5271534581 591185106 66521355142 12 x 74041163547 475148470 5411774596 6182155132 GEARED COBALT 15 WITH K&W FOLDING PROP PROPVOLTSAMPS 12 x 7 814 906 1027 1145 13 13x781 925 1048 1174 1317 15x7913 104 RPM x 1000 78 16 1 78 5 35 15855 1966 1474 18545 thenDISASTERI PWR IN watts 63 84 119 161 231 67 97 136 185 258 134 192 Nowabout last data entry 15 Ive run lot motors props 16-plus years Electric modeling never have happen have what consider pretty sturdy heavy motor test stand Ive run Continued page 144 nis ala rlmer IS perfectly proportioned modeling Curtiss Robin 049 EngInes -Channel RIC 41 WIngspan ElectrIc Power Optional sazsa Ku Very few full scale aircra5 ideally suited model flight us appealing old Curtiss Robin burn spruce linen age beautifully proportioned rubber electric glow engines Easy fon build trainerlihe performance Flyline Models Catalog 555Pfsnn 17031 2739503 INE MODELS INC PO Box 2135 FaIrfax VIrginia 22031 USA August 1988 141 SYNTHETIC WBRICANTS CASTOR WBRICANTS NITRO AIJOITIVES FREE CATALOG L TIPS INCLUDES TEFO & PRODUCT 800-242-0489 c0rtn4~5 nh nto 2 9 400489 ... Control Line Products Modelers serving Madelers Adiustable Sadder Horns troltines 4 HeanyttntyBellcranks~Handles Sdiustahle teadouttuides tslk Hardearn Custom Motor Mounts aith much mere Aluminum Inserts UHSUHPASSED QIIALIIIOUSHAHTStD SAIISFSCIIAN Write igAo receive ourlilt catalog Send name address Craftanlan Models InC 3 5 161sf Westfield redact 46074 dea e oqatries neited TWINS ARE CLASSIC AND AFFORDABLE Looking inexpensive opposed twin replace shaking smelly gas burner want scale like appearance smooth running 2 cycle glow operation Yes its back basics EHS Tradings Twin Star Comments .Have lot engnm no doubt thus u probaily best Bill Thomas Lake Havaau AZ .The Twin Star osceptionaiJy smooth engne thus displacement size Clarance Lee ENGINE EDITOR RCM MAGAZINE answer question often asked muffler availabler Wes muffler & header available CALL FOR INFORMATION EHS TRADING LTD 400 HUALANI ST BLDG 13E HILO HAWAII 96720 RC Electrics/Kopski Continued page 141 some motors power levels considerably ex cess whats shown never did test stand yield before time running 15 x 7 past 4500 rpm level pulled entire test stand over destroyed prop blades Talk about thrust dont know much thrust was BIG Anyway got new blades sure nice able get replacement parts Im gonna pursue further now youll have satisfied data have table information can useful sev eral ways First suggest graph grid pa per some parameter combinations such voltage axis rpm other voltmeter tach can easily see own system compares data guideline fact can fairly good job voltmeter Just assume voltage actually reaching motor about 10 11 volts per cell Multiplying num ber cells will give predicted rpm range voltage/rpm graph course other combinations information such curves power rpm can plotted Graphing real eye-opener Notice just little change rpm corresponds large change power ever wondered just few rpm made such difference flight performance reason true Gas-flying friends Rubber fliers too Next month special issue Sep tember 1988 Model Aviation represents fifth year association magazine has truly enjoyable ex perience both working good folks MA sharing Electric information fun light goes well expect deviate normal column format bit offer something little special next month Please forward comment question SASE please author address given very top column keep fingers away large fiberglass folder blades cause though dont need flip-start Electrics its generally useful keep 10 Chief Modelmaker Above put hand 1 -800-63HOBB V 808 935-9009 HAWAII STD TIME 10 AM-7PM Mon-Sag RC ScalelWischers Continued page 53 develop construction drawings first item list Scale modelers attributes namely pati ence must strong points hit/her makeup Almost same classbut quiteis person would like Scale model air craft hasnt done beforedifferent necessarily obscure own experience have yet run out subjects pub lished three-view drawings semiobseure types need really deep research hasnt yet occurred one-of-a-kind aircraft didnt remain obscure once modelers got hold design data Benny Howards racers example modeler chooses extremely com plex prototypemutiengines multiwings endless external detail struts rigging elab orate color schememust motivated limit project becomes infinite boring Kits type model rare Construction drawings can sometimes found much sup plementary data needed complete truly Scale airplane therefore large amounts re search must undertaken go see really super-Scale air craft models time World Championship Scale competition place see best Nats also rated highly other event attracted top-quality models especially FM class too few Sport Scale class theNats has re cently attracting modelers high-quality airplanes could flown FM class competitors chose has shift builders fine Scale aircraft away contests toward gather ings such Scale rallies recent years best have seen meets Merritt Zimmermanas A-scale DH Moth example being completely scale respect including handmade four-cylinder four-stroke engine being custom-designed custom-built Other examples Bob Nelitzs Piper J-3 Tay loreraft clipped-wing Bucker Jungman A-scale Models large size enable exact detailing need work under magni fier Currently aircraft seen Scale ral lies Toledo represent state-of-the-art Scale modeling What aweinspiring masterpieces flown scalelike manner closet queens appear shows prizes ribbons oniy certainiy confused glitter seen 00 Without Muffler large shows represent upper crust route ascent simple Scale model originating kit scratch-designed -built models surpass alland fly realistically top off assumes creators elegant air craft somehow different average modeler need describe backgrounds Dissatisfaction runs high makeup successive product oniy surpassed next using knowledge acquired Accumulated ex perience techniques general know constantly being updated isnt surprising find relationships such father/son engaged collecting knowledge frequently find modeler has connections full-size aviation activity People know airplanes often top modelers Scale flying An incident will cause minor damage trainer-type model can catastro phe Scale model tells us flight dis cipline important Scale flying stakes 144 Model Aviation 40 CC124 CU IN IMPACT ENGINEERING PROUDLY ANNOUNCES THAT OUR FULL PRODUCT LINE IS NOW CARRIED DY GREAT PLANES DISTR Iii KIj I-u LINE SYSTEMS PO Box 1502 Lewiston 04241 [12 Volt Winches responding advertisers mention read about Model Aviation W0flLOS SIOGESO SCALE PEOTO SEPV06 600 P10r0 PA0OS PLANS 3 VtEWS PHOTO-PACKS PLANS ENLARGING SASE EOErSng 00w JIo Pepiros Catatog $t- 00 60 SCflLF PlANS PHOTO SEOUIC[ 3209 Mdson Geeosboo Nc 27403 PSOoP (9192925239 No CoIleC
Edition: Model Aviation - 1988/08
Page Numbers: 48, 49, 140, 141, 144
AN EVENT Electric fliers look ward Second Annual Electric Fly-In Winston-Salem NC Radio Control Club Inc announced column last month just received additional information August 20-21 meet First CD Charles Spear 288 Holly Lane Mocksville NC 27028 Ive met Charles KRC meet hes fine person know should fine meet write him can get mailer includes meet descrip tion detailed map field called Thrift Field located Advance NC Meet activities include prizes Most Aer obatic Beauty Events latter flying things think Frequency qualifying will take place Saturday All-Up/Last-Down event Sunday winner activity goes home 50 bucks watch Out John Mount joy Other particulars meet include transmitter impound frequency control pins flight line charging on-field assistance bring Electric questions troubles refresh ments rest facilities nearby motels camp sites casual relaxed atmosphere Now can ya beat write Charlie tell im Bob sent ya did go Im able get model magazine month over period time get sample Its pretty ob vious Electric enjoying rapid growth clearly evidenced steady increase maga zine ads Electric kits other products Yet time about two years ago five popular monthlies carried regular dedicated Electric columns now looks like two still print Model Builders course Model Aviation s unbelievable paradox simul taneous growth decline Can anyone Out explain Since Ive just asked help matter may well ask help another concerns some Electric rules reader Califor nia sent copy some Electric Old-Timer rules developed some cooperating SAM groups As written particular rules form basis 1988 interim Elec tric power rules review will conducted 1989 evaluate rules suitability Now rules quite some rules indeed Some stipulate normal SAM require ments regarding model suitability other nor mal things like minimum wing loading some fanciful specifics like def 48 Model Aviation Radio Control 0 Electncs Bob Kopski 25 West End Dr Lansdale PA 19446 Killing two birds stone Leisure ferrite 05 motor has equipped Astro 4046 gear drive unit order provide means maintaining proper clearance between gears front end bell motor aluminum-plate shim has sandwiched between gearcase motor shims dimensions extended enough could also used bolt motor nose Amptique Author Bob Kopski has information about setup column month Kopaki finally got around building Astro Challenger before its first flight Top wing rubberbanded prop K&W 13 x 7 wIth large hub option folder motor cobalt 05 using seven 800-mAh batteries RC via Ace Silver Seven receiver Charlies ser vos An RJM OnlOff switch controls juice All-up weight 44 oz Bob cant build plain has improve thingslike wing struc ture two photos above R center section has beefed up stub spars spruce balsa shear webs glued between against sides main spars Additional balsa TE sheeting has added root area plywood plate protects structure rubberband hold-downs Construction elliptical tips 1 eased using laminated spars leading edge stock inition production 05 motor thus Frame size 35mm diameter 49mm long maximum Armature displacement 95cc maximum Must have three-bar commutator unusual stuff too Beyond similar different specifications nonferrite motors like made unobtainiumsee column April 87 issue MA Now believe heart Ive gotta LAST GUY field anywhere else deny anyone Electric fun surely dont understand fun rationale behind kinds rules What strange know SAM folks general super modelers know personally rank finest peo ple Ive met just cant figure out funloving folks would want such anguishing rules Therefore right now Im asking ANYONE can explain situation kindly write en lighten Ill pass good information along future column everyone can share reasoning may just something thats really neat generally unknown fairness must say made exactly same request same subject back August 85 issue earlier OT rules proposals creative like counting gear teeth got no thats ZERO reader feed back suspect nobody could explain Maybe Ill luckier time Meanwhile readers interested participating sort regimen can disassem ble motors immerse armatures suit able liquid contained calibrated glassware just like high school physics determine displacement see legal Ab Continued page 140 DISTRIBUTED BY 7550 5o GbrieI 5od ero CA 53422 806 455-1717 unusual tools borrowed JeweIry izunsmiuung Clock Making professional Making trades NOW AVAILABLE TO YOU BY MAIL guaranteedI II II Use coupon send name address $100 MICRO MARK 340-559 Snyder Ave eley Heights NJ 07922 ENAME ADDRESS L E ZIPJ m August 1988 49 Good news Commercial motor mounts Electrics above cast-aluminum item JT-EL1 JTec fits wide range motors 05/075 ferrites 15-size cobalts say looks like John Tatone gas-engine mount should John now JTec Lightweight glass-filled nylon unit shown below comes Sonic-Tronics Adjustable-width fea ture makes fit motors smallest largest Motor retained nylon tiewraps Weight 04 oz price $495 $975AVAILABLE AT AMERICAS$525 FINEST HOBBY SHOPS ZNDUDTflZND Over 1000NEW Catalog FROMI MicroMark Small Tool SpecialistsU FULL BODY PILOT KIT Contains pilot head handa boota helmet cap goggles full templates easy instruc tions Easy assemble finish Some simple sewing required Fully positionable too Prke #2061/6 scale 895 #205-Vs scale 995 #204-/6 scale1095 #2031/3 scale1695 DARNED GOOD AIRMEN Lightest pilots available Lifelike vinyl latex rubber Build Sportsman Barnstormer Full Body Bust - BUST PILOT KIT Contains pilot head helmet sport cap goggles jacket Easy assemble finish Ptoe #108-A scale NEW 595 #106-V6 scale695 #l05-Vs scale #104- scale. 895Some #103-V3 scale 1495 S mp e sew ng equ ed can estimate long should take pump up pack Just divide nominal capac ity hy charging rate multiply result 60 minutes/hour Simplifying math 3% cell capacity mAh equals charge time minutes 03 x mAh ge time minutes times interest Ni-Cds mAh 250 500 900 1200 minutes7515 2736 Lead-acid cells gel-cells Ah612 hours3 6 So use watch monitor long charging has going charger has shut off early push Start button again worried about overcharging feel pack cool safe push Start ton fact time pack cool VR light isnt glowing push Start button Ace R/C Overnighter set Ni-Cd charging instructions says same thing Charge 24 hours using charger provided before using device charge overnight 14 hours least monthly necessary advice because Ni-Cd cells have form abil ity hold charge happens slowly can successful fast charger af ter cells have formed So does leave TRC times want Set forget ie slow charge overnight dont want sit stopwatch mon ttor charging process times am bringing along palm-sized Ace R/C Over nighter plugs vans 12-VDC cigar lighter side two transmitters two receiver packs other Charging pro ceeds 14-hour rate whether van engine running stopped can useful cause TRC Fast Charger instructions specifi cally prohibit use engine running Overnighter voltage-regulated constant-current charger can internally programmed charge battery packs mAh ratings 250 500 900 1200 takes almost no room contained rugged metal case tt gets job done What can ask Ace R/C Overnighter kit 34K50 $2495 assem bled unit 34K50C $3395 Ace R/C Inc Box 51 IE Higginsville MO 64037 816 5847121 know what thinking now handle special charging plugs Very simple cut off put back JET PILOT KIT Pilot has molded jet helmet Contains face mask oxygen hose Estreme ly Realistic Weighs less oz P616 #308/ scale 595 #307-/ scale 695 ORDERING INSTRUCTIONS See dealer first order direct Add $100 shipping NYS residents add 7O/ tax Send check money order CODS OK Send $100 catalog Deans connectors available Ace R/C above have take along special connectornot whole 110VAC charger monitor whats going have Accu tach 2A described column April 1988 issue universal adapter Ugly Octopus described column March 1982 issue electronic repairs Ill carry Portasol soldering iron see February 1988 co lumn Well thats month know what plan about charging batteries Dont expect quick answers letters next few months because wont receiving mail sold house son Im off see world See Dealer add Dollar direct Ofder handling Throwing blade can real disaster due danger thrown blade also damage air plane would caused enormous vibration would result Substantial tor sional stresses encountered propel ler largely hub due great torque variations single-cylinder engines worse four-cycle engines poorly designed prop bomb wait ing go off advice keep eye open local hobby shop watch magazine ads manufacturers jump bandwagon offer quieter now sought-after multi bladed props Multi-Blade Props/AbbottRC Electrics/Kopski Continued page 46Continued page 49 lers various numbers blades di ameter two blades 25 Dn/D2 n er blades D2diameter two-bladed prop Dn eter prop n blades Plugging numbers expression provides values given table Whats available great majority commercially available props two bladed variety four major prop manufacturers known offer three bladed props Grish Tornado Cox Graupner make plastic/nylon props Zen gali makes black fiber-filled variety smaller sizes wooden props larger sizes Cox offers small three-bladers 51 range Grish offers three-bladers sizes up 10 Graupner offers larger props starting 9 going up 16 Zengali currently offering fiberfilled three-bladed props sizes 8 9 10 x 6 lOx 75 10 x 8 wooden threeor four-bladed props range diameter 13 28 Check local hobby shop find out whats currently available Its out question make own three- four-bladed props better really know what doing heck second thought just drink stuff glassware insteadits gotta fun Some Electric trivia brought mind looked back August 85 issue above reference column contained photo Astro Flights Bob Bouchers then-new Challengera very competent Electric Sailplane happens just finished flew new Challenger two days ago brought back viv id memories Bobs Bob brought 1984 KRC Electric Fly Yup way California gave opportunity fly fair Bob course because night before called desperation after just arriving East Coast seems Challenger found full-scale skies less friendly wing wound up some tears Mono Kote late Friday night evening before meet Bob very much needed some red transparent film patch things up Luckily brand new roll able accommodate Bob wing Jim ZarembskiRCM former Electric columnist too shop Now happens that roll MonoKote few square inches missingsaw no further use til last week Thats cover ing new Challenger Yup West Coast Bob East Coast Bob now have Challenger wings covering exactly same roll Mono Kote Hows some Electric trivia Anyway has explosion sorts Challenger population locality dur ing past six months effect went four during period 140 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $20000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 being fourth As result now have access lots Challenger thoughts experiences hints pass along future columns now Ill just say four presently outfitted geared cobalt 05s Ugh Theres detestable description again seven-cell packs various electrical capacities swing ing various sizes K&W folding props configured easily accessed vari able motor mount very versatile battery compartmentspecifically done could play variety power systems Thus time goes along hope have more infor mation pass along simple useful offering can make Challenger four locals turned out bit nose-heavy might keep mind arrange radio installation posi tion much aft possible Finally before leaving subject bit Electric trivia have built Challenger kits no doubt saw photos kit instruction manual manual written after 84 KRC meet some photos therein taken meet can tell very assuredly plane pictured defi nitely flies very well cause said above flew Astro 4046 gear drive 02/035 motors enthusiastically described March June 88 columns latter reference discussed some detail approach pinion gear re moval replacement turns out Mitch Poling Model Builders Electric Power colum nist also has some good words say about drive May 88 issue MB Mitch also offers something can make pinion gear removal lot simpler particular refers gear puller made BoLink ma jor supplier model car enthusiasts Mitch says $7 Model BL 6014 puller does good job well worth money Write BoLink 420 Hosea Rd Lawrenceville GA 30245 might also try hobby stores catering model cars have seen product Mitch says its good its good youre reading Electric column MB should June 88 column also discussed mounting drive OSs using shim properly space motor drive housing proper gear mesh photos month illustrates modeler used required shim also mount motor material used square aluminum about 30 40 mils thick suit able cutouts clear motor shaft screws etc sandwiched between gear drive housing motor front-end bell metal plate screwed onto Amptique firewall Neat similar mounting method used cobalt 15 its gear drive pictured column February 1987 Some motor/propeller performance data Last months column offered some motor performance data six cobalt iSs using direct drive month Id like offer some static per formance data cobalt geared OSs 15s different sizes folding props recently took data deciding what motor stall first new Challenger technically inclined please refer last months column discussion take such data everyone general formation can offer guidelines should wish use motor/prop combinations Two comments order First props used assembled large K&W hub shorter-hub optionwhich effec tively reduces diameter little listedis also available Second data below taken neutral motor-brush timing GEARED COBALT 05 WITH K&W FOLDING PROP PROPVOLTSAMPSRPMPWR IN X 1000watts 11 x 7457123 456 5271534581 591185106 66521355142 12 x 74041163547 475148470 5411774596 6182155132 GEARED COBALT 15 WITH K&W FOLDING PROP PROPVOLTSAMPS 12 x 7 814 906 1027 1145 13 13x781 925 1048 1174 1317 15x7913 104 RPM x 1000 78 16 1 78 5 35 15855 1966 1474 18545 thenDISASTERI PWR IN watts 63 84 119 161 231 67 97 136 185 258 134 192 Nowabout last data entry 15 Ive run lot motors props 16-plus years Electric modeling never have happen have what consider pretty sturdy heavy motor test stand Ive run Continued page 144 nis ala rlmer IS perfectly proportioned modeling Curtiss Robin 049 EngInes -Channel RIC 41 WIngspan ElectrIc Power Optional sazsa Ku Very few full scale aircra5 ideally suited model flight us appealing old Curtiss Robin burn spruce linen age beautifully proportioned rubber electric glow engines Easy fon build trainerlihe performance Flyline Models Catalog 555Pfsnn 17031 2739503 INE MODELS INC PO Box 2135 FaIrfax VIrginia 22031 USA August 1988 141 SYNTHETIC WBRICANTS CASTOR WBRICANTS NITRO AIJOITIVES FREE CATALOG L TIPS INCLUDES TEFO & PRODUCT 800-242-0489 c0rtn4~5 nh nto 2 9 400489 ... Control Line Products Modelers serving Madelers Adiustable Sadder Horns troltines 4 HeanyttntyBellcranks~Handles Sdiustahle teadouttuides tslk Hardearn Custom Motor Mounts aith much mere Aluminum Inserts UHSUHPASSED QIIALIIIOUSHAHTStD SAIISFSCIIAN Write igAo receive ourlilt catalog Send name address Craftanlan Models InC 3 5 161sf Westfield redact 46074 dea e oqatries neited TWINS ARE CLASSIC AND AFFORDABLE Looking inexpensive opposed twin replace shaking smelly gas burner want scale like appearance smooth running 2 cycle glow operation Yes its back basics EHS Tradings Twin Star Comments .Have lot engnm no doubt thus u probaily best Bill Thomas Lake Havaau AZ .The Twin Star osceptionaiJy smooth engne thus displacement size Clarance Lee ENGINE EDITOR RCM MAGAZINE answer question often asked muffler availabler Wes muffler & header available CALL FOR INFORMATION EHS TRADING LTD 400 HUALANI ST BLDG 13E HILO HAWAII 96720 RC Electrics/Kopski Continued page 141 some motors power levels considerably ex cess whats shown never did test stand yield before time running 15 x 7 past 4500 rpm level pulled entire test stand over destroyed prop blades Talk about thrust dont know much thrust was BIG Anyway got new blades sure nice able get replacement parts Im gonna pursue further now youll have satisfied data have table information can useful sev eral ways First suggest graph grid pa per some parameter combinations such voltage axis rpm other voltmeter tach can easily see own system compares data guideline fact can fairly good job voltmeter Just assume voltage actually reaching motor about 10 11 volts per cell Multiplying num ber cells will give predicted rpm range voltage/rpm graph course other combinations information such curves power rpm can plotted Graphing real eye-opener Notice just little change rpm corresponds large change power ever wondered just few rpm made such difference flight performance reason true Gas-flying friends Rubber fliers too Next month special issue Sep tember 1988 Model Aviation represents fifth year association magazine has truly enjoyable ex perience both working good folks MA sharing Electric information fun light goes well expect deviate normal column format bit offer something little special next month Please forward comment question SASE please author address given very top column keep fingers away large fiberglass folder blades cause though dont need flip-start Electrics its generally useful keep 10 Chief Modelmaker Above put hand 1 -800-63HOBB V 808 935-9009 HAWAII STD TIME 10 AM-7PM Mon-Sag RC ScalelWischers Continued page 53 develop construction drawings first item list Scale modelers attributes namely pati ence must strong points hit/her makeup Almost same classbut quiteis person would like Scale model air craft hasnt done beforedifferent necessarily obscure own experience have yet run out subjects pub lished three-view drawings semiobseure types need really deep research hasnt yet occurred one-of-a-kind aircraft didnt remain obscure once modelers got hold design data Benny Howards racers example modeler chooses extremely com plex prototypemutiengines multiwings endless external detail struts rigging elab orate color schememust motivated limit project becomes infinite boring Kits type model rare Construction drawings can sometimes found much sup plementary data needed complete truly Scale airplane therefore large amounts re search must undertaken go see really super-Scale air craft models time World Championship Scale competition place see best Nats also rated highly other event attracted top-quality models especially FM class too few Sport Scale class theNats has re cently attracting modelers high-quality airplanes could flown FM class competitors chose has shift builders fine Scale aircraft away contests toward gather ings such Scale rallies recent years best have seen meets Merritt Zimmermanas A-scale DH Moth example being completely scale respect including handmade four-cylinder four-stroke engine being custom-designed custom-built Other examples Bob Nelitzs Piper J-3 Tay loreraft clipped-wing Bucker Jungman A-scale Models large size enable exact detailing need work under magni fier Currently aircraft seen Scale ral lies Toledo represent state-of-the-art Scale modeling What aweinspiring masterpieces flown scalelike manner closet queens appear shows prizes ribbons oniy certainiy confused glitter seen 00 Without Muffler large shows represent upper crust route ascent simple Scale model originating kit scratch-designed -built models surpass alland fly realistically top off assumes creators elegant air craft somehow different average modeler need describe backgrounds Dissatisfaction runs high makeup successive product oniy surpassed next using knowledge acquired Accumulated ex perience techniques general know constantly being updated isnt surprising find relationships such father/son engaged collecting knowledge frequently find modeler has connections full-size aviation activity People know airplanes often top modelers Scale flying An incident will cause minor damage trainer-type model can catastro phe Scale model tells us flight dis cipline important Scale flying stakes 144 Model Aviation 40 CC124 CU IN IMPACT ENGINEERING PROUDLY ANNOUNCES THAT OUR FULL PRODUCT LINE IS NOW CARRIED DY GREAT PLANES DISTR Iii KIj I-u LINE SYSTEMS PO Box 1502 Lewiston 04241 [12 Volt Winches responding advertisers mention read about Model Aviation W0flLOS SIOGESO SCALE PEOTO SEPV06 600 P10r0 PA0OS PLANS 3 VtEWS PHOTO-PACKS PLANS ENLARGING SASE EOErSng 00w JIo Pepiros Catatog $t- 00 60 SCflLF PlANS PHOTO SEOUIC[ 3209 Mdson Geeosboo Nc 27403 PSOoP (9192925239 No CoIleC
Edition: Model Aviation - 1988/08
Page Numbers: 48, 49, 140, 141, 144
AN EVENT Electric fliers look ward Second Annual Electric Fly-In Winston-Salem NC Radio Control Club Inc announced column last month just received additional information August 20-21 meet First CD Charles Spear 288 Holly Lane Mocksville NC 27028 Ive met Charles KRC meet hes fine person know should fine meet write him can get mailer includes meet descrip tion detailed map field called Thrift Field located Advance NC Meet activities include prizes Most Aer obatic Beauty Events latter flying things think Frequency qualifying will take place Saturday All-Up/Last-Down event Sunday winner activity goes home 50 bucks watch Out John Mount joy Other particulars meet include transmitter impound frequency control pins flight line charging on-field assistance bring Electric questions troubles refresh ments rest facilities nearby motels camp sites casual relaxed atmosphere Now can ya beat write Charlie tell im Bob sent ya did go Im able get model magazine month over period time get sample Its pretty ob vious Electric enjoying rapid growth clearly evidenced steady increase maga zine ads Electric kits other products Yet time about two years ago five popular monthlies carried regular dedicated Electric columns now looks like two still print Model Builders course Model Aviation s unbelievable paradox simul taneous growth decline Can anyone Out explain Since Ive just asked help matter may well ask help another concerns some Electric rules reader Califor nia sent copy some Electric Old-Timer rules developed some cooperating SAM groups As written particular rules form basis 1988 interim Elec tric power rules review will conducted 1989 evaluate rules suitability Now rules quite some rules indeed Some stipulate normal SAM require ments regarding model suitability other nor mal things like minimum wing loading some fanciful specifics like def 48 Model Aviation Radio Control 0 Electncs Bob Kopski 25 West End Dr Lansdale PA 19446 Killing two birds stone Leisure ferrite 05 motor has equipped Astro 4046 gear drive unit order provide means maintaining proper clearance between gears front end bell motor aluminum-plate shim has sandwiched between gearcase motor shims dimensions extended enough could also used bolt motor nose Amptique Author Bob Kopski has information about setup column month Kopaki finally got around building Astro Challenger before its first flight Top wing rubberbanded prop K&W 13 x 7 wIth large hub option folder motor cobalt 05 using seven 800-mAh batteries RC via Ace Silver Seven receiver Charlies ser vos An RJM OnlOff switch controls juice All-up weight 44 oz Bob cant build plain has improve thingslike wing struc ture two photos above R center section has beefed up stub spars spruce balsa shear webs glued between against sides main spars Additional balsa TE sheeting has added root area plywood plate protects structure rubberband hold-downs Construction elliptical tips 1 eased using laminated spars leading edge stock inition production 05 motor thus Frame size 35mm diameter 49mm long maximum Armature displacement 95cc maximum Must have three-bar commutator unusual stuff too Beyond similar different specifications nonferrite motors like made unobtainiumsee column April 87 issue MA Now believe heart Ive gotta LAST GUY field anywhere else deny anyone Electric fun surely dont understand fun rationale behind kinds rules What strange know SAM folks general super modelers know personally rank finest peo ple Ive met just cant figure out funloving folks would want such anguishing rules Therefore right now Im asking ANYONE can explain situation kindly write en lighten Ill pass good information along future column everyone can share reasoning may just something thats really neat generally unknown fairness must say made exactly same request same subject back August 85 issue earlier OT rules proposals creative like counting gear teeth got no thats ZERO reader feed back suspect nobody could explain Maybe Ill luckier time Meanwhile readers interested participating sort regimen can disassem ble motors immerse armatures suit able liquid contained calibrated glassware just like high school physics determine displacement see legal Ab Continued page 140 DISTRIBUTED BY 7550 5o GbrieI 5od ero CA 53422 806 455-1717 unusual tools borrowed JeweIry izunsmiuung Clock Making professional Making trades NOW AVAILABLE TO YOU BY MAIL guaranteedI II II Use coupon send name address $100 MICRO MARK 340-559 Snyder Ave eley Heights NJ 07922 ENAME ADDRESS L E ZIPJ m August 1988 49 Good news Commercial motor mounts Electrics above cast-aluminum item JT-EL1 JTec fits wide range motors 05/075 ferrites 15-size cobalts say looks like John Tatone gas-engine mount should John now JTec Lightweight glass-filled nylon unit shown below comes Sonic-Tronics Adjustable-width fea ture makes fit motors smallest largest Motor retained nylon tiewraps Weight 04 oz price $495 $975AVAILABLE AT AMERICAS$525 FINEST HOBBY SHOPS ZNDUDTflZND Over 1000NEW Catalog FROMI MicroMark Small Tool SpecialistsU FULL BODY PILOT KIT Contains pilot head handa boota helmet cap goggles full templates easy instruc tions Easy assemble finish Some simple sewing required Fully positionable too Prke #2061/6 scale 895 #205-Vs scale 995 #204-/6 scale1095 #2031/3 scale1695 DARNED GOOD AIRMEN Lightest pilots available Lifelike vinyl latex rubber Build Sportsman Barnstormer Full Body Bust - BUST PILOT KIT Contains pilot head helmet sport cap goggles jacket Easy assemble finish Ptoe #108-A scale NEW 595 #106-V6 scale695 #l05-Vs scale #104- scale. 895Some #103-V3 scale 1495 S mp e sew ng equ ed can estimate long should take pump up pack Just divide nominal capac ity hy charging rate multiply result 60 minutes/hour Simplifying math 3% cell capacity mAh equals charge time minutes 03 x mAh ge time minutes times interest Ni-Cds mAh 250 500 900 1200 minutes7515 2736 Lead-acid cells gel-cells Ah612 hours3 6 So use watch monitor long charging has going charger has shut off early push Start button again worried about overcharging feel pack cool safe push Start ton fact time pack cool VR light isnt glowing push Start button Ace R/C Overnighter set Ni-Cd charging instructions says same thing Charge 24 hours using charger provided before using device charge overnight 14 hours least monthly necessary advice because Ni-Cd cells have form abil ity hold charge happens slowly can successful fast charger af ter cells have formed So does leave TRC times want Set forget ie slow charge overnight dont want sit stopwatch mon ttor charging process times am bringing along palm-sized Ace R/C Over nighter plugs vans 12-VDC cigar lighter side two transmitters two receiver packs other Charging pro ceeds 14-hour rate whether van engine running stopped can useful cause TRC Fast Charger instructions specifi cally prohibit use engine running Overnighter voltage-regulated constant-current charger can internally programmed charge battery packs mAh ratings 250 500 900 1200 takes almost no room contained rugged metal case tt gets job done What can ask Ace R/C Overnighter kit 34K50 $2495 assem bled unit 34K50C $3395 Ace R/C Inc Box 51 IE Higginsville MO 64037 816 5847121 know what thinking now handle special charging plugs Very simple cut off put back JET PILOT KIT Pilot has molded jet helmet Contains face mask oxygen hose Estreme ly Realistic Weighs less oz P616 #308/ scale 595 #307-/ scale 695 ORDERING INSTRUCTIONS See dealer first order direct Add $100 shipping NYS residents add 7O/ tax Send check money order CODS OK Send $100 catalog Deans connectors available Ace R/C above have take along special connectornot whole 110VAC charger monitor whats going have Accu tach 2A described column April 1988 issue universal adapter Ugly Octopus described column March 1982 issue electronic repairs Ill carry Portasol soldering iron see February 1988 co lumn Well thats month know what plan about charging batteries Dont expect quick answers letters next few months because wont receiving mail sold house son Im off see world See Dealer add Dollar direct Ofder handling Throwing blade can real disaster due danger thrown blade also damage air plane would caused enormous vibration would result Substantial tor sional stresses encountered propel ler largely hub due great torque variations single-cylinder engines worse four-cycle engines poorly designed prop bomb wait ing go off advice keep eye open local hobby shop watch magazine ads manufacturers jump bandwagon offer quieter now sought-after multi bladed props Multi-Blade Props/AbbottRC Electrics/Kopski Continued page 46Continued page 49 lers various numbers blades di ameter two blades 25 Dn/D2 n er blades D2diameter two-bladed prop Dn eter prop n blades Plugging numbers expression provides values given table Whats available great majority commercially available props two bladed variety four major prop manufacturers known offer three bladed props Grish Tornado Cox Graupner make plastic/nylon props Zen gali makes black fiber-filled variety smaller sizes wooden props larger sizes Cox offers small three-bladers 51 range Grish offers three-bladers sizes up 10 Graupner offers larger props starting 9 going up 16 Zengali currently offering fiberfilled three-bladed props sizes 8 9 10 x 6 lOx 75 10 x 8 wooden threeor four-bladed props range diameter 13 28 Check local hobby shop find out whats currently available Its out question make own three- four-bladed props better really know what doing heck second thought just drink stuff glassware insteadits gotta fun Some Electric trivia brought mind looked back August 85 issue above reference column contained photo Astro Flights Bob Bouchers then-new Challengera very competent Electric Sailplane happens just finished flew new Challenger two days ago brought back viv id memories Bobs Bob brought 1984 KRC Electric Fly Yup way California gave opportunity fly fair Bob course because night before called desperation after just arriving East Coast seems Challenger found full-scale skies less friendly wing wound up some tears Mono Kote late Friday night evening before meet Bob very much needed some red transparent film patch things up Luckily brand new roll able accommodate Bob wing Jim ZarembskiRCM former Electric columnist too shop Now happens that roll MonoKote few square inches missingsaw no further use til last week Thats cover ing new Challenger Yup West Coast Bob East Coast Bob now have Challenger wings covering exactly same roll Mono Kote Hows some Electric trivia Anyway has explosion sorts Challenger population locality dur ing past six months effect went four during period 140 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $20000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 being fourth As result now have access lots Challenger thoughts experiences hints pass along future columns now Ill just say four presently outfitted geared cobalt 05s Ugh Theres detestable description again seven-cell packs various electrical capacities swing ing various sizes K&W folding props configured easily accessed vari able motor mount very versatile battery compartmentspecifically done could play variety power systems Thus time goes along hope have more infor mation pass along simple useful offering can make Challenger four locals turned out bit nose-heavy might keep mind arrange radio installation posi tion much aft possible Finally before leaving subject bit Electric trivia have built Challenger kits no doubt saw photos kit instruction manual manual written after 84 KRC meet some photos therein taken meet can tell very assuredly plane pictured defi nitely flies very well cause said above flew Astro 4046 gear drive 02/035 motors enthusiastically described March June 88 columns latter reference discussed some detail approach pinion gear re moval replacement turns out Mitch Poling Model Builders Electric Power colum nist also has some good words say about drive May 88 issue MB Mitch also offers something can make pinion gear removal lot simpler particular refers gear puller made BoLink ma jor supplier model car enthusiasts Mitch says $7 Model BL 6014 puller does good job well worth money Write BoLink 420 Hosea Rd Lawrenceville GA 30245 might also try hobby stores catering model cars have seen product Mitch says its good its good youre reading Electric column MB should June 88 column also discussed mounting drive OSs using shim properly space motor drive housing proper gear mesh photos month illustrates modeler used required shim also mount motor material used square aluminum about 30 40 mils thick suit able cutouts clear motor shaft screws etc sandwiched between gear drive housing motor front-end bell metal plate screwed onto Amptique firewall Neat similar mounting method used cobalt 15 its gear drive pictured column February 1987 Some motor/propeller performance data Last months column offered some motor performance data six cobalt iSs using direct drive month Id like offer some static per formance data cobalt geared OSs 15s different sizes folding props recently took data deciding what motor stall first new Challenger technically inclined please refer last months column discussion take such data everyone general formation can offer guidelines should wish use motor/prop combinations Two comments order First props used assembled large K&W hub shorter-hub optionwhich effec tively reduces diameter little listedis also available Second data below taken neutral motor-brush timing GEARED COBALT 05 WITH K&W FOLDING PROP PROPVOLTSAMPSRPMPWR IN X 1000watts 11 x 7457123 456 5271534581 591185106 66521355142 12 x 74041163547 475148470 5411774596 6182155132 GEARED COBALT 15 WITH K&W FOLDING PROP PROPVOLTSAMPS 12 x 7 814 906 1027 1145 13 13x781 925 1048 1174 1317 15x7913 104 RPM x 1000 78 16 1 78 5 35 15855 1966 1474 18545 thenDISASTERI PWR IN watts 63 84 119 161 231 67 97 136 185 258 134 192 Nowabout last data entry 15 Ive run lot motors props 16-plus years Electric modeling never have happen have what consider pretty sturdy heavy motor test stand Ive run Continued page 144 nis ala rlmer IS perfectly proportioned modeling Curtiss Robin 049 EngInes -Channel RIC 41 WIngspan ElectrIc Power Optional sazsa Ku Very few full scale aircra5 ideally suited model flight us appealing old Curtiss Robin burn spruce linen age beautifully proportioned rubber electric glow engines Easy fon build trainerlihe performance Flyline Models Catalog 555Pfsnn 17031 2739503 INE MODELS INC PO Box 2135 FaIrfax VIrginia 22031 USA August 1988 141 SYNTHETIC WBRICANTS CASTOR WBRICANTS NITRO AIJOITIVES FREE CATALOG L TIPS INCLUDES TEFO & PRODUCT 800-242-0489 c0rtn4~5 nh nto 2 9 400489 ... Control Line Products Modelers serving Madelers Adiustable Sadder Horns troltines 4 HeanyttntyBellcranks~Handles Sdiustahle teadouttuides tslk Hardearn Custom Motor Mounts aith much mere Aluminum Inserts UHSUHPASSED QIIALIIIOUSHAHTStD SAIISFSCIIAN Write igAo receive ourlilt catalog Send name address Craftanlan Models InC 3 5 161sf Westfield redact 46074 dea e oqatries neited TWINS ARE CLASSIC AND AFFORDABLE Looking inexpensive opposed twin replace shaking smelly gas burner want scale like appearance smooth running 2 cycle glow operation Yes its back basics EHS Tradings Twin Star Comments .Have lot engnm no doubt thus u probaily best Bill Thomas Lake Havaau AZ .The Twin Star osceptionaiJy smooth engne thus displacement size Clarance Lee ENGINE EDITOR RCM MAGAZINE answer question often asked muffler availabler Wes muffler & header available CALL FOR INFORMATION EHS TRADING LTD 400 HUALANI ST BLDG 13E HILO HAWAII 96720 RC Electrics/Kopski Continued page 141 some motors power levels considerably ex cess whats shown never did test stand yield before time running 15 x 7 past 4500 rpm level pulled entire test stand over destroyed prop blades Talk about thrust dont know much thrust was BIG Anyway got new blades sure nice able get replacement parts Im gonna pursue further now youll have satisfied data have table information can useful sev eral ways First suggest graph grid pa per some parameter combinations such voltage axis rpm other voltmeter tach can easily see own system compares data guideline fact can fairly good job voltmeter Just assume voltage actually reaching motor about 10 11 volts per cell Multiplying num ber cells will give predicted rpm range voltage/rpm graph course other combinations information such curves power rpm can plotted Graphing real eye-opener Notice just little change rpm corresponds large change power ever wondered just few rpm made such difference flight performance reason true Gas-flying friends Rubber fliers too Next month special issue Sep tember 1988 Model Aviation represents fifth year association magazine has truly enjoyable ex perience both working good folks MA sharing Electric information fun light goes well expect deviate normal column format bit offer something little special next month Please forward comment question SASE please author address given very top column keep fingers away large fiberglass folder blades cause though dont need flip-start Electrics its generally useful keep 10 Chief Modelmaker Above put hand 1 -800-63HOBB V 808 935-9009 HAWAII STD TIME 10 AM-7PM Mon-Sag RC ScalelWischers Continued page 53 develop construction drawings first item list Scale modelers attributes namely pati ence must strong points hit/her makeup Almost same classbut quiteis person would like Scale model air craft hasnt done beforedifferent necessarily obscure own experience have yet run out subjects pub lished three-view drawings semiobseure types need really deep research hasnt yet occurred one-of-a-kind aircraft didnt remain obscure once modelers got hold design data Benny Howards racers example modeler chooses extremely com plex prototypemutiengines multiwings endless external detail struts rigging elab orate color schememust motivated limit project becomes infinite boring Kits type model rare Construction drawings can sometimes found much sup plementary data needed complete truly Scale airplane therefore large amounts re search must undertaken go see really super-Scale air craft models time World Championship Scale competition place see best Nats also rated highly other event attracted top-quality models especially FM class too few Sport Scale class theNats has re cently attracting modelers high-quality airplanes could flown FM class competitors chose has shift builders fine Scale aircraft away contests toward gather ings such Scale rallies recent years best have seen meets Merritt Zimmermanas A-scale DH Moth example being completely scale respect including handmade four-cylinder four-stroke engine being custom-designed custom-built Other examples Bob Nelitzs Piper J-3 Tay loreraft clipped-wing Bucker Jungman A-scale Models large size enable exact detailing need work under magni fier Currently aircraft seen Scale ral lies Toledo represent state-of-the-art Scale modeling What aweinspiring masterpieces flown scalelike manner closet queens appear shows prizes ribbons oniy certainiy confused glitter seen 00 Without Muffler large shows represent upper crust route ascent simple Scale model originating kit scratch-designed -built models surpass alland fly realistically top off assumes creators elegant air craft somehow different average modeler need describe backgrounds Dissatisfaction runs high makeup successive product oniy surpassed next using knowledge acquired Accumulated ex perience techniques general know constantly being updated isnt surprising find relationships such father/son engaged collecting knowledge frequently find modeler has connections full-size aviation activity People know airplanes often top modelers Scale flying An incident will cause minor damage trainer-type model can catastro phe Scale model tells us flight dis cipline important Scale flying stakes 144 Model Aviation 40 CC124 CU IN IMPACT ENGINEERING PROUDLY ANNOUNCES THAT OUR FULL PRODUCT LINE IS NOW CARRIED DY GREAT PLANES DISTR Iii KIj I-u LINE SYSTEMS PO Box 1502 Lewiston 04241 [12 Volt Winches responding advertisers mention read about Model Aviation W0flLOS SIOGESO SCALE PEOTO SEPV06 600 P10r0 PA0OS PLANS 3 VtEWS PHOTO-PACKS PLANS ENLARGING SASE EOErSng 00w JIo Pepiros Catatog $t- 00 60 SCflLF PlANS PHOTO SEOUIC[ 3209 Mdson Geeosboo Nc 27403 PSOoP (9192925239 No CoIleC
Edition: Model Aviation - 1988/08
Page Numbers: 48, 49, 140, 141, 144
AN EVENT Electric fliers look ward Second Annual Electric Fly-In Winston-Salem NC Radio Control Club Inc announced column last month just received additional information August 20-21 meet First CD Charles Spear 288 Holly Lane Mocksville NC 27028 Ive met Charles KRC meet hes fine person know should fine meet write him can get mailer includes meet descrip tion detailed map field called Thrift Field located Advance NC Meet activities include prizes Most Aer obatic Beauty Events latter flying things think Frequency qualifying will take place Saturday All-Up/Last-Down event Sunday winner activity goes home 50 bucks watch Out John Mount joy Other particulars meet include transmitter impound frequency control pins flight line charging on-field assistance bring Electric questions troubles refresh ments rest facilities nearby motels camp sites casual relaxed atmosphere Now can ya beat write Charlie tell im Bob sent ya did go Im able get model magazine month over period time get sample Its pretty ob vious Electric enjoying rapid growth clearly evidenced steady increase maga zine ads Electric kits other products Yet time about two years ago five popular monthlies carried regular dedicated Electric columns now looks like two still print Model Builders course Model Aviation s unbelievable paradox simul taneous growth decline Can anyone Out explain Since Ive just asked help matter may well ask help another concerns some Electric rules reader Califor nia sent copy some Electric Old-Timer rules developed some cooperating SAM groups As written particular rules form basis 1988 interim Elec tric power rules review will conducted 1989 evaluate rules suitability Now rules quite some rules indeed Some stipulate normal SAM require ments regarding model suitability other nor mal things like minimum wing loading some fanciful specifics like def 48 Model Aviation Radio Control 0 Electncs Bob Kopski 25 West End Dr Lansdale PA 19446 Killing two birds stone Leisure ferrite 05 motor has equipped Astro 4046 gear drive unit order provide means maintaining proper clearance between gears front end bell motor aluminum-plate shim has sandwiched between gearcase motor shims dimensions extended enough could also used bolt motor nose Amptique Author Bob Kopski has information about setup column month Kopaki finally got around building Astro Challenger before its first flight Top wing rubberbanded prop K&W 13 x 7 wIth large hub option folder motor cobalt 05 using seven 800-mAh batteries RC via Ace Silver Seven receiver Charlies ser vos An RJM OnlOff switch controls juice All-up weight 44 oz Bob cant build plain has improve thingslike wing struc ture two photos above R center section has beefed up stub spars spruce balsa shear webs glued between against sides main spars Additional balsa TE sheeting has added root area plywood plate protects structure rubberband hold-downs Construction elliptical tips 1 eased using laminated spars leading edge stock inition production 05 motor thus Frame size 35mm diameter 49mm long maximum Armature displacement 95cc maximum Must have three-bar commutator unusual stuff too Beyond similar different specifications nonferrite motors like made unobtainiumsee column April 87 issue MA Now believe heart Ive gotta LAST GUY field anywhere else deny anyone Electric fun surely dont understand fun rationale behind kinds rules What strange know SAM folks general super modelers know personally rank finest peo ple Ive met just cant figure out funloving folks would want such anguishing rules Therefore right now Im asking ANYONE can explain situation kindly write en lighten Ill pass good information along future column everyone can share reasoning may just something thats really neat generally unknown fairness must say made exactly same request same subject back August 85 issue earlier OT rules proposals creative like counting gear teeth got no thats ZERO reader feed back suspect nobody could explain Maybe Ill luckier time Meanwhile readers interested participating sort regimen can disassem ble motors immerse armatures suit able liquid contained calibrated glassware just like high school physics determine displacement see legal Ab Continued page 140 DISTRIBUTED BY 7550 5o GbrieI 5od ero CA 53422 806 455-1717 unusual tools borrowed JeweIry izunsmiuung Clock Making professional Making trades NOW AVAILABLE TO YOU BY MAIL guaranteedI II II Use coupon send name address $100 MICRO MARK 340-559 Snyder Ave eley Heights NJ 07922 ENAME ADDRESS L E ZIPJ m August 1988 49 Good news Commercial motor mounts Electrics above cast-aluminum item JT-EL1 JTec fits wide range motors 05/075 ferrites 15-size cobalts say looks like John Tatone gas-engine mount should John now JTec Lightweight glass-filled nylon unit shown below comes Sonic-Tronics Adjustable-width fea ture makes fit motors smallest largest Motor retained nylon tiewraps Weight 04 oz price $495 $975AVAILABLE AT AMERICAS$525 FINEST HOBBY SHOPS ZNDUDTflZND Over 1000NEW Catalog FROMI MicroMark Small Tool SpecialistsU FULL BODY PILOT KIT Contains pilot head handa boota helmet cap goggles full templates easy instruc tions Easy assemble finish Some simple sewing required Fully positionable too Prke #2061/6 scale 895 #205-Vs scale 995 #204-/6 scale1095 #2031/3 scale1695 DARNED GOOD AIRMEN Lightest pilots available Lifelike vinyl latex rubber Build Sportsman Barnstormer Full Body Bust - BUST PILOT KIT Contains pilot head helmet sport cap goggles jacket Easy assemble finish Ptoe #108-A scale NEW 595 #106-V6 scale695 #l05-Vs scale #104- scale. 895Some #103-V3 scale 1495 S mp e sew ng equ ed can estimate long should take pump up pack Just divide nominal capac ity hy charging rate multiply result 60 minutes/hour Simplifying math 3% cell capacity mAh equals charge time minutes 03 x mAh ge time minutes times interest Ni-Cds mAh 250 500 900 1200 minutes7515 2736 Lead-acid cells gel-cells Ah612 hours3 6 So use watch monitor long charging has going charger has shut off early push Start button again worried about overcharging feel pack cool safe push Start ton fact time pack cool VR light isnt glowing push Start button Ace R/C Overnighter set Ni-Cd charging instructions says same thing Charge 24 hours using charger provided before using device charge overnight 14 hours least monthly necessary advice because Ni-Cd cells have form abil ity hold charge happens slowly can successful fast charger af ter cells have formed So does leave TRC times want Set forget ie slow charge overnight dont want sit stopwatch mon ttor charging process times am bringing along palm-sized Ace R/C Over nighter plugs vans 12-VDC cigar lighter side two transmitters two receiver packs other Charging pro ceeds 14-hour rate whether van engine running stopped can useful cause TRC Fast Charger instructions specifi cally prohibit use engine running Overnighter voltage-regulated constant-current charger can internally programmed charge battery packs mAh ratings 250 500 900 1200 takes almost no room contained rugged metal case tt gets job done What can ask Ace R/C Overnighter kit 34K50 $2495 assem bled unit 34K50C $3395 Ace R/C Inc Box 51 IE Higginsville MO 64037 816 5847121 know what thinking now handle special charging plugs Very simple cut off put back JET PILOT KIT Pilot has molded jet helmet Contains face mask oxygen hose Estreme ly Realistic Weighs less oz P616 #308/ scale 595 #307-/ scale 695 ORDERING INSTRUCTIONS See dealer first order direct Add $100 shipping NYS residents add 7O/ tax Send check money order CODS OK Send $100 catalog Deans connectors available Ace R/C above have take along special connectornot whole 110VAC charger monitor whats going have Accu tach 2A described column April 1988 issue universal adapter Ugly Octopus described column March 1982 issue electronic repairs Ill carry Portasol soldering iron see February 1988 co lumn Well thats month know what plan about charging batteries Dont expect quick answers letters next few months because wont receiving mail sold house son Im off see world See Dealer add Dollar direct Ofder handling Throwing blade can real disaster due danger thrown blade also damage air plane would caused enormous vibration would result Substantial tor sional stresses encountered propel ler largely hub due great torque variations single-cylinder engines worse four-cycle engines poorly designed prop bomb wait ing go off advice keep eye open local hobby shop watch magazine ads manufacturers jump bandwagon offer quieter now sought-after multi bladed props Multi-Blade Props/AbbottRC Electrics/Kopski Continued page 46Continued page 49 lers various numbers blades di ameter two blades 25 Dn/D2 n er blades D2diameter two-bladed prop Dn eter prop n blades Plugging numbers expression provides values given table Whats available great majority commercially available props two bladed variety four major prop manufacturers known offer three bladed props Grish Tornado Cox Graupner make plastic/nylon props Zen gali makes black fiber-filled variety smaller sizes wooden props larger sizes Cox offers small three-bladers 51 range Grish offers three-bladers sizes up 10 Graupner offers larger props starting 9 going up 16 Zengali currently offering fiberfilled three-bladed props sizes 8 9 10 x 6 lOx 75 10 x 8 wooden threeor four-bladed props range diameter 13 28 Check local hobby shop find out whats currently available Its out question make own three- four-bladed props better really know what doing heck second thought just drink stuff glassware insteadits gotta fun Some Electric trivia brought mind looked back August 85 issue above reference column contained photo Astro Flights Bob Bouchers then-new Challengera very competent Electric Sailplane happens just finished flew new Challenger two days ago brought back viv id memories Bobs Bob brought 1984 KRC Electric Fly Yup way California gave opportunity fly fair Bob course because night before called desperation after just arriving East Coast seems Challenger found full-scale skies less friendly wing wound up some tears Mono Kote late Friday night evening before meet Bob very much needed some red transparent film patch things up Luckily brand new roll able accommodate Bob wing Jim ZarembskiRCM former Electric columnist too shop Now happens that roll MonoKote few square inches missingsaw no further use til last week Thats cover ing new Challenger Yup West Coast Bob East Coast Bob now have Challenger wings covering exactly same roll Mono Kote Hows some Electric trivia Anyway has explosion sorts Challenger population locality dur ing past six months effect went four during period 140 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $20000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 being fourth As result now have access lots Challenger thoughts experiences hints pass along future columns now Ill just say four presently outfitted geared cobalt 05s Ugh Theres detestable description again seven-cell packs various electrical capacities swing ing various sizes K&W folding props configured easily accessed vari able motor mount very versatile battery compartmentspecifically done could play variety power systems Thus time goes along hope have more infor mation pass along simple useful offering can make Challenger four locals turned out bit nose-heavy might keep mind arrange radio installation posi tion much aft possible Finally before leaving subject bit Electric trivia have built Challenger kits no doubt saw photos kit instruction manual manual written after 84 KRC meet some photos therein taken meet can tell very assuredly plane pictured defi nitely flies very well cause said above flew Astro 4046 gear drive 02/035 motors enthusiastically described March June 88 columns latter reference discussed some detail approach pinion gear re moval replacement turns out Mitch Poling Model Builders Electric Power colum nist also has some good words say about drive May 88 issue MB Mitch also offers something can make pinion gear removal lot simpler particular refers gear puller made BoLink ma jor supplier model car enthusiasts Mitch says $7 Model BL 6014 puller does good job well worth money Write BoLink 420 Hosea Rd Lawrenceville GA 30245 might also try hobby stores catering model cars have seen product Mitch says its good its good youre reading Electric column MB should June 88 column also discussed mounting drive OSs using shim properly space motor drive housing proper gear mesh photos month illustrates modeler used required shim also mount motor material used square aluminum about 30 40 mils thick suit able cutouts clear motor shaft screws etc sandwiched between gear drive housing motor front-end bell metal plate screwed onto Amptique firewall Neat similar mounting method used cobalt 15 its gear drive pictured column February 1987 Some motor/propeller performance data Last months column offered some motor performance data six cobalt iSs using direct drive month Id like offer some static per formance data cobalt geared OSs 15s different sizes folding props recently took data deciding what motor stall first new Challenger technically inclined please refer last months column discussion take such data everyone general formation can offer guidelines should wish use motor/prop combinations Two comments order First props used assembled large K&W hub shorter-hub optionwhich effec tively reduces diameter little listedis also available Second data below taken neutral motor-brush timing GEARED COBALT 05 WITH K&W FOLDING PROP PROPVOLTSAMPSRPMPWR IN X 1000watts 11 x 7457123 456 5271534581 591185106 66521355142 12 x 74041163547 475148470 5411774596 6182155132 GEARED COBALT 15 WITH K&W FOLDING PROP PROPVOLTSAMPS 12 x 7 814 906 1027 1145 13 13x781 925 1048 1174 1317 15x7913 104 RPM x 1000 78 16 1 78 5 35 15855 1966 1474 18545 thenDISASTERI PWR IN watts 63 84 119 161 231 67 97 136 185 258 134 192 Nowabout last data entry 15 Ive run lot motors props 16-plus years Electric modeling never have happen have what consider pretty sturdy heavy motor test stand Ive run Continued page 144 nis ala rlmer IS perfectly proportioned modeling Curtiss Robin 049 EngInes -Channel RIC 41 WIngspan ElectrIc Power Optional sazsa Ku Very few full scale aircra5 ideally suited model flight us appealing old Curtiss Robin burn spruce linen age beautifully proportioned rubber electric glow engines Easy fon build trainerlihe performance Flyline Models Catalog 555Pfsnn 17031 2739503 INE MODELS INC PO Box 2135 FaIrfax VIrginia 22031 USA August 1988 141 SYNTHETIC WBRICANTS CASTOR WBRICANTS NITRO AIJOITIVES FREE CATALOG L TIPS INCLUDES TEFO & PRODUCT 800-242-0489 c0rtn4~5 nh nto 2 9 400489 ... Control Line Products Modelers serving Madelers Adiustable Sadder Horns troltines 4 HeanyttntyBellcranks~Handles Sdiustahle teadouttuides tslk Hardearn Custom Motor Mounts aith much mere Aluminum Inserts UHSUHPASSED QIIALIIIOUSHAHTStD SAIISFSCIIAN Write igAo receive ourlilt catalog Send name address Craftanlan Models InC 3 5 161sf Westfield redact 46074 dea e oqatries neited TWINS ARE CLASSIC AND AFFORDABLE Looking inexpensive opposed twin replace shaking smelly gas burner want scale like appearance smooth running 2 cycle glow operation Yes its back basics EHS Tradings Twin Star Comments .Have lot engnm no doubt thus u probaily best Bill Thomas Lake Havaau AZ .The Twin Star osceptionaiJy smooth engne thus displacement size Clarance Lee ENGINE EDITOR RCM MAGAZINE answer question often asked muffler availabler Wes muffler & header available CALL FOR INFORMATION EHS TRADING LTD 400 HUALANI ST BLDG 13E HILO HAWAII 96720 RC Electrics/Kopski Continued page 141 some motors power levels considerably ex cess whats shown never did test stand yield before time running 15 x 7 past 4500 rpm level pulled entire test stand over destroyed prop blades Talk about thrust dont know much thrust was BIG Anyway got new blades sure nice able get replacement parts Im gonna pursue further now youll have satisfied data have table information can useful sev eral ways First suggest graph grid pa per some parameter combinations such voltage axis rpm other voltmeter tach can easily see own system compares data guideline fact can fairly good job voltmeter Just assume voltage actually reaching motor about 10 11 volts per cell Multiplying num ber cells will give predicted rpm range voltage/rpm graph course other combinations information such curves power rpm can plotted Graphing real eye-opener Notice just little change rpm corresponds large change power ever wondered just few rpm made such difference flight performance reason true Gas-flying friends Rubber fliers too Next month special issue Sep tember 1988 Model Aviation represents fifth year association magazine has truly enjoyable ex perience both working good folks MA sharing Electric information fun light goes well expect deviate normal column format bit offer something little special next month Please forward comment question SASE please author address given very top column keep fingers away large fiberglass folder blades cause though dont need flip-start Electrics its generally useful keep 10 Chief Modelmaker Above put hand 1 -800-63HOBB V 808 935-9009 HAWAII STD TIME 10 AM-7PM Mon-Sag RC ScalelWischers Continued page 53 develop construction drawings first item list Scale modelers attributes namely pati ence must strong points hit/her makeup Almost same classbut quiteis person would like Scale model air craft hasnt done beforedifferent necessarily obscure own experience have yet run out subjects pub lished three-view drawings semiobseure types need really deep research hasnt yet occurred one-of-a-kind aircraft didnt remain obscure once modelers got hold design data Benny Howards racers example modeler chooses extremely com plex prototypemutiengines multiwings endless external detail struts rigging elab orate color schememust motivated limit project becomes infinite boring Kits type model rare Construction drawings can sometimes found much sup plementary data needed complete truly Scale airplane therefore large amounts re search must undertaken go see really super-Scale air craft models time World Championship Scale competition place see best Nats also rated highly other event attracted top-quality models especially FM class too few Sport Scale class theNats has re cently attracting modelers high-quality airplanes could flown FM class competitors chose has shift builders fine Scale aircraft away contests toward gather ings such Scale rallies recent years best have seen meets Merritt Zimmermanas A-scale DH Moth example being completely scale respect including handmade four-cylinder four-stroke engine being custom-designed custom-built Other examples Bob Nelitzs Piper J-3 Tay loreraft clipped-wing Bucker Jungman A-scale Models large size enable exact detailing need work under magni fier Currently aircraft seen Scale ral lies Toledo represent state-of-the-art Scale modeling What aweinspiring masterpieces flown scalelike manner closet queens appear shows prizes ribbons oniy certainiy confused glitter seen 00 Without Muffler large shows represent upper crust route ascent simple Scale model originating kit scratch-designed -built models surpass alland fly realistically top off assumes creators elegant air craft somehow different average modeler need describe backgrounds Dissatisfaction runs high makeup successive product oniy surpassed next using knowledge acquired Accumulated ex perience techniques general know constantly being updated isnt surprising find relationships such father/son engaged collecting knowledge frequently find modeler has connections full-size aviation activity People know airplanes often top modelers Scale flying An incident will cause minor damage trainer-type model can catastro phe Scale model tells us flight dis cipline important Scale flying stakes 144 Model Aviation 40 CC124 CU IN IMPACT ENGINEERING PROUDLY ANNOUNCES THAT OUR FULL PRODUCT LINE IS NOW CARRIED DY GREAT PLANES DISTR Iii KIj I-u LINE SYSTEMS PO Box 1502 Lewiston 04241 [12 Volt Winches responding advertisers mention read about Model Aviation W0flLOS SIOGESO SCALE PEOTO SEPV06 600 P10r0 PA0OS PLANS 3 VtEWS PHOTO-PACKS PLANS ENLARGING SASE EOErSng 00w JIo Pepiros Catatog $t- 00 60 SCflLF PlANS PHOTO SEOUIC[ 3209 Mdson Geeosboo Nc 27403 PSOoP (9192925239 No CoIleC