George Myers Radio Thchnique 70 Froehllch Farm Rd Hkksvlile NY 11801 ABSTRACT Give up OWBAM systems TRC Fast Charger Ace RIC Overnighter use rec reational vehicles RVs CAUGHT lot flak mis-describing RCHA Gold Silver stickers being re quired March 1988 column Perhaps will accept apology major gaffe 145 columns attempt present news soon possible considering built-in threemonth publishing cycle delay jumped ahead AMA Executive Council decision havent made yet Bad reporting furor over stickers nothing com pared generated noting OWRAM old wideband AM systems should abandoned Now lets look real world Back 1983 gave OWBAMs eight years wear out Everybody knew what planned 1991 So have now entered transition phase RC environment moving mixed 40/80-kHz raster existed 1987 OWBAMs included toward full utili zation 50 channels FCC has given us OWBAMs both give receive un necessary interference Consider 1 use 50 channels planned FCC will almost certainly start assigning unused channels other users FCC reassigned top-end UHF TV chan nels TV industry didnt use six-meter Ham band used VHF TV Channel 1 Didnt ever wonder rotary TV tuners always start Channel 2 2 unused channels reassigned hang onto OWBAM RC systems can ex pect sec increase interference problems Right now enjoying reduced interfer ence 40-kHz environment relative what 80-kHz environment during 1980-83 period primarily because superior transmitters have sold 1983-87 period Based transmitter test results trade shows past five Nats estimate about half transmitters con test use today can qualify Gold stickers remainder can qualify Silver Whats left OWBAMs Perhaps used regularly sport fliers believe just sitting shelves Can prove Im wrong Narrow-band transmitters radiate less energy places RC receivers can interpret energy interference fact com bined intelligent flight station arrangements good impound procedures made life easier existing receivers hence reduced interfer ence cant stop job half done der make free use 50 channels assigned us resorting compensating flight line arrangements like Pacific Plan need have use narrow-band transmitters bet ter receivers Because 50 channels inter stitial other users channels 10 kHz away what really need re ceiver can survive real 100-channel/ 10kHz environment have chosen call imag mary receiver future narrow-band re ceiver name AMA has paid consultant define what need engineering terms can find published AMA Guidelines AMA News September October 1987 MA buy use narrow-band receivers available free use RC channels will possible What alternative Obviously can con tinue use outdated equipment want make special provisions such blanking out refusing use other legal channels necessary avoid interfering out dated equipment course chosen Australia about 15 years ago Canada five years ago few conversations people have received opinion thing tactic accomplished pro long use antiquated equipment thereby fru strating everybody Both countries have looking us United States America mod42 Model Aviation Ace RIC Overnighter essential part Georges traveling kit Internal programming iets charge battery packs ratings 250 500 900 1200 mAh constant current piugs vans cigar-lighter receptacie can used whether engine running Two transmitter two receiver packs charge simultaneousiy 14 hours TRC Fast Charger another vital part Georges traveiing kit its DC-to-DC converter output 24 VDC constant rate about 20 amps doesnt care Ni-Cd ceiis battery wiil charge up 12 ceils capacities 250 1200 mAh elers vast purchasing power force de velopment better 72 MHz RC systems People protecting OWBAM radios say wont give up system works perfectly well sound like people wouldnt give up perfectly good regenerative receiver back Sixties moved single 27 MHz RC channel five channels regens suffering interference newer narrow-band crystal-controlled systems also refused give up reed systems 27 MHz Seventies digital radio came along four new channels 72 MHz plus 75640 refused convert OWBAM sets 1983 added 11 new channels now say wont give up 1991 support 50 channels have Want bet Field charging battery packs will travel Alaska summer will live van much possible purpose have fitted out amenities RV As happens have few Ni-Cd-powered devices keep charged such single-cell glow-plug heater two-cell flashlight two-cell electric shaver two-cell electric screwdriver also us able drill two-cell electric soldering iron several four-cell flight packs seven-cell elec tric motor pack quiet flying couple eightand nine-cell transmitter packs 10-cell VCR pack 12 VDC motorcycle battery en gine starting Obviously device came charger plugs 110 VAC supply could bring along stack chargersif some 110 VAC source plug would work well either visiting friends motel campsite 1 lO-VAC hookup what about other times might use inverter changes 12 VDC 110 VAC As happens have thema 200-watt unit draws 24 amps doing putting 50 mA flight pack Burn 34 amp-hours put our 500 mAh flight pack just cant live kind power waste Want buy invertercheap almost universal charger what call TRC Fast Charger $78 hipping made TRC Engineering 10972 10th Ave Grand Rap ids MI 49504 616 453-8257 takes 20 24 amps out 12 VDC supply depending type number cells being charged pumps up 500-mAh pack about 15 min utes Thats about hour out 12 VDC source hour flight packvery efficient TRC advertised being useful charging Ni-Cd packs constructed 12 cells cells can rated 250 mAh 1200 mAh can because DC-DC converter output 24 VDC constant charging rate about 20 amps cause has 24 VDC output also capable fast-charging 12 VDC wet lead-acid batteries beware customary dangers water consumption evolution hydrogen gas possibility sulfuric acid splashes Ive used TRC Fast Charger above works dont use ThC gel cells Gel cells dont like charged two-amp rate use CaRa Automatic 12-Volt Charger set hold 1365 VDC Gel Cell requires 110 VAC source does best job know live fact CaRa Products Canton Continued page 139 WILLIAMS ACCESSORIES BROTHERS 4 PILOTS STANDARD TSMAN RACING TARY WHEELS AGE TH CONTOUR BALLOON EN AGE 4 ENGINES PRATT & WHITNEY HT HONE cipteclac~ons Autno~Pv ItVOKS SP 80ds90 9898~ ca ot mote 1~taPd 9edce~ 00V40 $ a S s9 9 0b SP Vo S/N&Jflflhii RID ID WE IRENE OOI R~d oodeo CA 93422 466-1717 August 1988 43 SEND $3 FOR FULLY ILLUSTRATED CATALOG IAWNEE ST SAN MARCOS CALIFORNIA 92069 PARABELLUM LLAS DISTRIBUTED BY THE WORLD IS FLYING 1N RED DEER IN 1988 AUGUST 1 13th ORLD CHAMPIONSHIP AND YOU CAN BE PART OF THIS WORLD CLASS EVENT BY OWNING YOUR OWN SET OF OFFICIAL COMMEMORATIVE PINS POPULAR AVIATION ARTIST JOHN P FERGUSON HAS DESIGNED SEVEN PINS EXCLUSIVELY FOR WAC 88 DEPICTING THE OFFICIAL LOGO AND SIX COMPETING COUNTRIES THIS BEAUTIFUL FRAMED SET CAN BE YOURS FOR ONLY US $4995 AS UONUS EACH ORDER WILL RECEIVE THREE ADDITIONAL COLLECTOR PINS FROM THE INTERNATIONAL FESTIVAL OF FLIGHT THESE FULL COLOR CLOISONNE PINS ARE OF SUCH HIGH QUALITY THAT WE ABSOLUTELY GUARANTEE YOUR SATISFACTION OR YOUR MONEY BACK Ehe authorized WAC88 pins available HOW TO ORDER SEND MO VISA MASTER CARD OR AMERICAN EXPRESS TT cRESTWOOD EMBLEMS PO BOX BOBS STN C EDMONTON ALBERTA CANADA T5B 4K6 US$4995 FOR EACH SET PLUS US$300 FOR POSTAGE AND HANDLING Toledo/Blakeslee Continued page 135 Ehe National Soaring Society again shared booth LSF just elec tion new officers hand President Bob Steele VP Ray Hayes Secre tary Jim Martin Treasurer Susie Lipp Representing NSS President Pete Carr DistricE Ill VP Ed Lightcap Sailplane community indeed fortu nate have such capable people serving both organizations group has exciting plans make Soaring bigger better us keep name LSF mailing list send card PO Box 647 Mundelein IL 60060 Bob Steeles address 10173 St Joe Rd Ft Wayne IN 46835 telephone 219 485-1145 youd like NSS info write Pete Carr 329 Little Ave Ridgeway PA 15053 telephone 814 772-4851 Magazines American model maga zines hand plus two British pub lishers Since probably already know about American ones Ill just say few words about British mags Argus Specialist Publications puts out two magazines interest Sailplaners Ra dio Control Models Electronics Ra dio Modeler used available through AMA just read ar rangement being dropped So now well have send checks directly Argus PO Box 35 Wolsey House Wolsey Road Hemel Hempstead Hertfordshire HP2 4SS England RM $3000 per year RCM&E $3100 Radio Control Model World easier deal because Traplet Publications has US office RCMW joy read maialy because Soaring column writ ten Sean Walbankalso White Sheet newsletter fame Sean corresponds about half Soaring clubs world material covers wide range ledo Special price $3000 per year tell BB sent shoald OK Write Traplet Distribution USA 1635 Wade Dr Paso Robles CA 93446 telephone 805 239-0997 Scale Model Research Bob Banka busy one-armed paper hanger selling Foto-Paaks Scale interest surging color pictures need finishing documentation Foto-Paaks contain 10 28 color shots air plane particular type Bob has Paaks 57 different Sailplanes 19 motor glid ers adding new ones time its good inquire hearts desire availableor coming SMRs address 2334 Ticonderoga Way Costa Mesa CA 92626 telephone 714 979-8058 Space Case easy-to-remember name line plastic cases can custom designed hold protect thing transmitters complete planes Space Cases also popular RC car crowd power fliers railroad ers 1987 US F3B Team used Space Cases planes winches other stuff Everything went Germany back fine shape Suggest contact Ma trix Enterprises 7015 Carroll Rd San Diego CA 92121 telephone 619 4509509 SR Batteries Larry Sribnick guy can supply nickel-cadmium pack might needbe transmitter re ceiver electric motor something else SR first offer high capacity packs will still custom make sort pack specifications Cells packs guaranteed form memory Larry says response customer demand single source batteries accessor ies now stocking high quality charg ers connectors motors hookup wire etc good service because beginners experts too often confused about batteries chargers full info send 45C pre-addressed return envelope SR Box 287 Bellport NY 11713 telephone 516 286-0079 Sailplane static competition seven Sailplanes enteredand two powered Come Sailplaners Lets show em beauties next year Mark Kummerow Chicago won second straight yearboth years flying wings Last year 200-in Ultra saur year 168-in PetraSaur inspiration both plane Gene Dees Icarosaur specs PetraSaur 168 span 11 chord 2070 sq area E-174/HQ 0010 airfoils 29 sweep 50 washout 10 dihe dral 15 winglet span 514 chord 80 sq area NACA 0009 airfoil 10 lb weight three channels controlling elevons flaps Construction foam carbon fiber balsa plywood spruce Ultracote MonoKote EconoKote Well done Mark Howd Ultrasaur go Second place went Troy Lawickis nicely finished Fiesta Multiplex kit third place new LSF trea surer Susie Lipp beautiful Windsong Susies ship has over 100 flights it looks better new ones Cant stand Radio Technique/Myers Continued page 43 SD 57013 605/987-5924 basic thing know about TRC Fast Charger thao monitors rate-of-change voltage pack being charged shuts off 1 detects quick voltage rise typical siEuatlon pack fully charged gas bubbles starting form 2 detects quick voltage drop typical fully charged cell going overcharge Because uses voltage-change monitoring does depend measuring absolute voltage TRC Fast Charger doesnt care cells pack same reason will fully charge cells old have high resistance certain cells havent charged couple months Try slow charging scrap have early model TRC Fast Charger can fooled shutting off before pack fully charged An easy way fool charger move around battery leads during charging session start prob ing around circuit voltmeter either procedures will cause enough change contact resistance present itself voltagechange monitoring circuit abrupt voltage rise drop Charging stops automatically Later models have desensitized ignore abrupt voltage changes Actually prefer charger shut off too soon action causes undercharging easily rectified Assuming know pack being charged exhausted know nominal capacity cell August 1988 139 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
Edition: Model Aviation - 1988/08
Page Numbers: 42, 43, 139, 140
George Myers Radio Thchnique 70 Froehllch Farm Rd Hkksvlile NY 11801 ABSTRACT Give up OWBAM systems TRC Fast Charger Ace RIC Overnighter use rec reational vehicles RVs CAUGHT lot flak mis-describing RCHA Gold Silver stickers being re quired March 1988 column Perhaps will accept apology major gaffe 145 columns attempt present news soon possible considering built-in threemonth publishing cycle delay jumped ahead AMA Executive Council decision havent made yet Bad reporting furor over stickers nothing com pared generated noting OWRAM old wideband AM systems should abandoned Now lets look real world Back 1983 gave OWBAMs eight years wear out Everybody knew what planned 1991 So have now entered transition phase RC environment moving mixed 40/80-kHz raster existed 1987 OWBAMs included toward full utili zation 50 channels FCC has given us OWBAMs both give receive un necessary interference Consider 1 use 50 channels planned FCC will almost certainly start assigning unused channels other users FCC reassigned top-end UHF TV chan nels TV industry didnt use six-meter Ham band used VHF TV Channel 1 Didnt ever wonder rotary TV tuners always start Channel 2 2 unused channels reassigned hang onto OWBAM RC systems can ex pect sec increase interference problems Right now enjoying reduced interfer ence 40-kHz environment relative what 80-kHz environment during 1980-83 period primarily because superior transmitters have sold 1983-87 period Based transmitter test results trade shows past five Nats estimate about half transmitters con test use today can qualify Gold stickers remainder can qualify Silver Whats left OWBAMs Perhaps used regularly sport fliers believe just sitting shelves Can prove Im wrong Narrow-band transmitters radiate less energy places RC receivers can interpret energy interference fact com bined intelligent flight station arrangements good impound procedures made life easier existing receivers hence reduced interfer ence cant stop job half done der make free use 50 channels assigned us resorting compensating flight line arrangements like Pacific Plan need have use narrow-band transmitters bet ter receivers Because 50 channels inter stitial other users channels 10 kHz away what really need re ceiver can survive real 100-channel/ 10kHz environment have chosen call imag mary receiver future narrow-band re ceiver name AMA has paid consultant define what need engineering terms can find published AMA Guidelines AMA News September October 1987 MA buy use narrow-band receivers available free use RC channels will possible What alternative Obviously can con tinue use outdated equipment want make special provisions such blanking out refusing use other legal channels necessary avoid interfering out dated equipment course chosen Australia about 15 years ago Canada five years ago few conversations people have received opinion thing tactic accomplished pro long use antiquated equipment thereby fru strating everybody Both countries have looking us United States America mod42 Model Aviation Ace RIC Overnighter essential part Georges traveling kit Internal programming iets charge battery packs ratings 250 500 900 1200 mAh constant current piugs vans cigar-lighter receptacie can used whether engine running Two transmitter two receiver packs charge simultaneousiy 14 hours TRC Fast Charger another vital part Georges traveiing kit its DC-to-DC converter output 24 VDC constant rate about 20 amps doesnt care Ni-Cd ceiis battery wiil charge up 12 ceils capacities 250 1200 mAh elers vast purchasing power force de velopment better 72 MHz RC systems People protecting OWBAM radios say wont give up system works perfectly well sound like people wouldnt give up perfectly good regenerative receiver back Sixties moved single 27 MHz RC channel five channels regens suffering interference newer narrow-band crystal-controlled systems also refused give up reed systems 27 MHz Seventies digital radio came along four new channels 72 MHz plus 75640 refused convert OWBAM sets 1983 added 11 new channels now say wont give up 1991 support 50 channels have Want bet Field charging battery packs will travel Alaska summer will live van much possible purpose have fitted out amenities RV As happens have few Ni-Cd-powered devices keep charged such single-cell glow-plug heater two-cell flashlight two-cell electric shaver two-cell electric screwdriver also us able drill two-cell electric soldering iron several four-cell flight packs seven-cell elec tric motor pack quiet flying couple eightand nine-cell transmitter packs 10-cell VCR pack 12 VDC motorcycle battery en gine starting Obviously device came charger plugs 110 VAC supply could bring along stack chargersif some 110 VAC source plug would work well either visiting friends motel campsite 1 lO-VAC hookup what about other times might use inverter changes 12 VDC 110 VAC As happens have thema 200-watt unit draws 24 amps doing putting 50 mA flight pack Burn 34 amp-hours put our 500 mAh flight pack just cant live kind power waste Want buy invertercheap almost universal charger what call TRC Fast Charger $78 hipping made TRC Engineering 10972 10th Ave Grand Rap ids MI 49504 616 453-8257 takes 20 24 amps out 12 VDC supply depending type number cells being charged pumps up 500-mAh pack about 15 min utes Thats about hour out 12 VDC source hour flight packvery efficient TRC advertised being useful charging Ni-Cd packs constructed 12 cells cells can rated 250 mAh 1200 mAh can because DC-DC converter output 24 VDC constant charging rate about 20 amps cause has 24 VDC output also capable fast-charging 12 VDC wet lead-acid batteries beware customary dangers water consumption evolution hydrogen gas possibility sulfuric acid splashes Ive used TRC Fast Charger above works dont use ThC gel cells Gel cells dont like charged two-amp rate use CaRa Automatic 12-Volt Charger set hold 1365 VDC Gel Cell requires 110 VAC source does best job know live fact CaRa Products Canton Continued page 139 WILLIAMS ACCESSORIES BROTHERS 4 PILOTS STANDARD TSMAN RACING TARY WHEELS AGE TH CONTOUR BALLOON EN AGE 4 ENGINES PRATT & WHITNEY HT HONE cipteclac~ons Autno~Pv ItVOKS SP 80ds90 9898~ ca ot mote 1~taPd 9edce~ 00V40 $ a S s9 9 0b SP Vo S/N&Jflflhii RID ID WE IRENE OOI R~d oodeo CA 93422 466-1717 August 1988 43 SEND $3 FOR FULLY ILLUSTRATED CATALOG IAWNEE ST SAN MARCOS CALIFORNIA 92069 PARABELLUM LLAS DISTRIBUTED BY THE WORLD IS FLYING 1N RED DEER IN 1988 AUGUST 1 13th ORLD CHAMPIONSHIP AND YOU CAN BE PART OF THIS WORLD CLASS EVENT BY OWNING YOUR OWN SET OF OFFICIAL COMMEMORATIVE PINS POPULAR AVIATION ARTIST JOHN P FERGUSON HAS DESIGNED SEVEN PINS EXCLUSIVELY FOR WAC 88 DEPICTING THE OFFICIAL LOGO AND SIX COMPETING COUNTRIES THIS BEAUTIFUL FRAMED SET CAN BE YOURS FOR ONLY US $4995 AS UONUS EACH ORDER WILL RECEIVE THREE ADDITIONAL COLLECTOR PINS FROM THE INTERNATIONAL FESTIVAL OF FLIGHT THESE FULL COLOR CLOISONNE PINS ARE OF SUCH HIGH QUALITY THAT WE ABSOLUTELY GUARANTEE YOUR SATISFACTION OR YOUR MONEY BACK Ehe authorized WAC88 pins available HOW TO ORDER SEND MO VISA MASTER CARD OR AMERICAN EXPRESS TT cRESTWOOD EMBLEMS PO BOX BOBS STN C EDMONTON ALBERTA CANADA T5B 4K6 US$4995 FOR EACH SET PLUS US$300 FOR POSTAGE AND HANDLING Toledo/Blakeslee Continued page 135 Ehe National Soaring Society again shared booth LSF just elec tion new officers hand President Bob Steele VP Ray Hayes Secre tary Jim Martin Treasurer Susie Lipp Representing NSS President Pete Carr DistricE Ill VP Ed Lightcap Sailplane community indeed fortu nate have such capable people serving both organizations group has exciting plans make Soaring bigger better us keep name LSF mailing list send card PO Box 647 Mundelein IL 60060 Bob Steeles address 10173 St Joe Rd Ft Wayne IN 46835 telephone 219 485-1145 youd like NSS info write Pete Carr 329 Little Ave Ridgeway PA 15053 telephone 814 772-4851 Magazines American model maga zines hand plus two British pub lishers Since probably already know about American ones Ill just say few words about British mags Argus Specialist Publications puts out two magazines interest Sailplaners Ra dio Control Models Electronics Ra dio Modeler used available through AMA just read ar rangement being dropped So now well have send checks directly Argus PO Box 35 Wolsey House Wolsey Road Hemel Hempstead Hertfordshire HP2 4SS England RM $3000 per year RCM&E $3100 Radio Control Model World easier deal because Traplet Publications has US office RCMW joy read maialy because Soaring column writ ten Sean Walbankalso White Sheet newsletter fame Sean corresponds about half Soaring clubs world material covers wide range ledo Special price $3000 per year tell BB sent shoald OK Write Traplet Distribution USA 1635 Wade Dr Paso Robles CA 93446 telephone 805 239-0997 Scale Model Research Bob Banka busy one-armed paper hanger selling Foto-Paaks Scale interest surging color pictures need finishing documentation Foto-Paaks contain 10 28 color shots air plane particular type Bob has Paaks 57 different Sailplanes 19 motor glid ers adding new ones time its good inquire hearts desire availableor coming SMRs address 2334 Ticonderoga Way Costa Mesa CA 92626 telephone 714 979-8058 Space Case easy-to-remember name line plastic cases can custom designed hold protect thing transmitters complete planes Space Cases also popular RC car crowd power fliers railroad ers 1987 US F3B Team used Space Cases planes winches other stuff Everything went Germany back fine shape Suggest contact Ma trix Enterprises 7015 Carroll Rd San Diego CA 92121 telephone 619 4509509 SR Batteries Larry Sribnick guy can supply nickel-cadmium pack might needbe transmitter re ceiver electric motor something else SR first offer high capacity packs will still custom make sort pack specifications Cells packs guaranteed form memory Larry says response customer demand single source batteries accessor ies now stocking high quality charg ers connectors motors hookup wire etc good service because beginners experts too often confused about batteries chargers full info send 45C pre-addressed return envelope SR Box 287 Bellport NY 11713 telephone 516 286-0079 Sailplane static competition seven Sailplanes enteredand two powered Come Sailplaners Lets show em beauties next year Mark Kummerow Chicago won second straight yearboth years flying wings Last year 200-in Ultra saur year 168-in PetraSaur inspiration both plane Gene Dees Icarosaur specs PetraSaur 168 span 11 chord 2070 sq area E-174/HQ 0010 airfoils 29 sweep 50 washout 10 dihe dral 15 winglet span 514 chord 80 sq area NACA 0009 airfoil 10 lb weight three channels controlling elevons flaps Construction foam carbon fiber balsa plywood spruce Ultracote MonoKote EconoKote Well done Mark Howd Ultrasaur go Second place went Troy Lawickis nicely finished Fiesta Multiplex kit third place new LSF trea surer Susie Lipp beautiful Windsong Susies ship has over 100 flights it looks better new ones Cant stand Radio Technique/Myers Continued page 43 SD 57013 605/987-5924 basic thing know about TRC Fast Charger thao monitors rate-of-change voltage pack being charged shuts off 1 detects quick voltage rise typical siEuatlon pack fully charged gas bubbles starting form 2 detects quick voltage drop typical fully charged cell going overcharge Because uses voltage-change monitoring does depend measuring absolute voltage TRC Fast Charger doesnt care cells pack same reason will fully charge cells old have high resistance certain cells havent charged couple months Try slow charging scrap have early model TRC Fast Charger can fooled shutting off before pack fully charged An easy way fool charger move around battery leads during charging session start prob ing around circuit voltmeter either procedures will cause enough change contact resistance present itself voltagechange monitoring circuit abrupt voltage rise drop Charging stops automatically Later models have desensitized ignore abrupt voltage changes Actually prefer charger shut off too soon action causes undercharging easily rectified Assuming know pack being charged exhausted know nominal capacity cell August 1988 139 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
Edition: Model Aviation - 1988/08
Page Numbers: 42, 43, 139, 140
George Myers Radio Thchnique 70 Froehllch Farm Rd Hkksvlile NY 11801 ABSTRACT Give up OWBAM systems TRC Fast Charger Ace RIC Overnighter use rec reational vehicles RVs CAUGHT lot flak mis-describing RCHA Gold Silver stickers being re quired March 1988 column Perhaps will accept apology major gaffe 145 columns attempt present news soon possible considering built-in threemonth publishing cycle delay jumped ahead AMA Executive Council decision havent made yet Bad reporting furor over stickers nothing com pared generated noting OWRAM old wideband AM systems should abandoned Now lets look real world Back 1983 gave OWBAMs eight years wear out Everybody knew what planned 1991 So have now entered transition phase RC environment moving mixed 40/80-kHz raster existed 1987 OWBAMs included toward full utili zation 50 channels FCC has given us OWBAMs both give receive un necessary interference Consider 1 use 50 channels planned FCC will almost certainly start assigning unused channels other users FCC reassigned top-end UHF TV chan nels TV industry didnt use six-meter Ham band used VHF TV Channel 1 Didnt ever wonder rotary TV tuners always start Channel 2 2 unused channels reassigned hang onto OWBAM RC systems can ex pect sec increase interference problems Right now enjoying reduced interfer ence 40-kHz environment relative what 80-kHz environment during 1980-83 period primarily because superior transmitters have sold 1983-87 period Based transmitter test results trade shows past five Nats estimate about half transmitters con test use today can qualify Gold stickers remainder can qualify Silver Whats left OWBAMs Perhaps used regularly sport fliers believe just sitting shelves Can prove Im wrong Narrow-band transmitters radiate less energy places RC receivers can interpret energy interference fact com bined intelligent flight station arrangements good impound procedures made life easier existing receivers hence reduced interfer ence cant stop job half done der make free use 50 channels assigned us resorting compensating flight line arrangements like Pacific Plan need have use narrow-band transmitters bet ter receivers Because 50 channels inter stitial other users channels 10 kHz away what really need re ceiver can survive real 100-channel/ 10kHz environment have chosen call imag mary receiver future narrow-band re ceiver name AMA has paid consultant define what need engineering terms can find published AMA Guidelines AMA News September October 1987 MA buy use narrow-band receivers available free use RC channels will possible What alternative Obviously can con tinue use outdated equipment want make special provisions such blanking out refusing use other legal channels necessary avoid interfering out dated equipment course chosen Australia about 15 years ago Canada five years ago few conversations people have received opinion thing tactic accomplished pro long use antiquated equipment thereby fru strating everybody Both countries have looking us United States America mod42 Model Aviation Ace RIC Overnighter essential part Georges traveling kit Internal programming iets charge battery packs ratings 250 500 900 1200 mAh constant current piugs vans cigar-lighter receptacie can used whether engine running Two transmitter two receiver packs charge simultaneousiy 14 hours TRC Fast Charger another vital part Georges traveiing kit its DC-to-DC converter output 24 VDC constant rate about 20 amps doesnt care Ni-Cd ceiis battery wiil charge up 12 ceils capacities 250 1200 mAh elers vast purchasing power force de velopment better 72 MHz RC systems People protecting OWBAM radios say wont give up system works perfectly well sound like people wouldnt give up perfectly good regenerative receiver back Sixties moved single 27 MHz RC channel five channels regens suffering interference newer narrow-band crystal-controlled systems also refused give up reed systems 27 MHz Seventies digital radio came along four new channels 72 MHz plus 75640 refused convert OWBAM sets 1983 added 11 new channels now say wont give up 1991 support 50 channels have Want bet Field charging battery packs will travel Alaska summer will live van much possible purpose have fitted out amenities RV As happens have few Ni-Cd-powered devices keep charged such single-cell glow-plug heater two-cell flashlight two-cell electric shaver two-cell electric screwdriver also us able drill two-cell electric soldering iron several four-cell flight packs seven-cell elec tric motor pack quiet flying couple eightand nine-cell transmitter packs 10-cell VCR pack 12 VDC motorcycle battery en gine starting Obviously device came charger plugs 110 VAC supply could bring along stack chargersif some 110 VAC source plug would work well either visiting friends motel campsite 1 lO-VAC hookup what about other times might use inverter changes 12 VDC 110 VAC As happens have thema 200-watt unit draws 24 amps doing putting 50 mA flight pack Burn 34 amp-hours put our 500 mAh flight pack just cant live kind power waste Want buy invertercheap almost universal charger what call TRC Fast Charger $78 hipping made TRC Engineering 10972 10th Ave Grand Rap ids MI 49504 616 453-8257 takes 20 24 amps out 12 VDC supply depending type number cells being charged pumps up 500-mAh pack about 15 min utes Thats about hour out 12 VDC source hour flight packvery efficient TRC advertised being useful charging Ni-Cd packs constructed 12 cells cells can rated 250 mAh 1200 mAh can because DC-DC converter output 24 VDC constant charging rate about 20 amps cause has 24 VDC output also capable fast-charging 12 VDC wet lead-acid batteries beware customary dangers water consumption evolution hydrogen gas possibility sulfuric acid splashes Ive used TRC Fast Charger above works dont use ThC gel cells Gel cells dont like charged two-amp rate use CaRa Automatic 12-Volt Charger set hold 1365 VDC Gel Cell requires 110 VAC source does best job know live fact CaRa Products Canton Continued page 139 WILLIAMS ACCESSORIES BROTHERS 4 PILOTS STANDARD TSMAN RACING TARY WHEELS AGE TH CONTOUR BALLOON EN AGE 4 ENGINES PRATT & WHITNEY HT HONE cipteclac~ons Autno~Pv ItVOKS SP 80ds90 9898~ ca ot mote 1~taPd 9edce~ 00V40 $ a S s9 9 0b SP Vo S/N&Jflflhii RID ID WE IRENE OOI R~d oodeo CA 93422 466-1717 August 1988 43 SEND $3 FOR FULLY ILLUSTRATED CATALOG IAWNEE ST SAN MARCOS CALIFORNIA 92069 PARABELLUM LLAS DISTRIBUTED BY THE WORLD IS FLYING 1N RED DEER IN 1988 AUGUST 1 13th ORLD CHAMPIONSHIP AND YOU CAN BE PART OF THIS WORLD CLASS EVENT BY OWNING YOUR OWN SET OF OFFICIAL COMMEMORATIVE PINS POPULAR AVIATION ARTIST JOHN P FERGUSON HAS DESIGNED SEVEN PINS EXCLUSIVELY FOR WAC 88 DEPICTING THE OFFICIAL LOGO AND SIX COMPETING COUNTRIES THIS BEAUTIFUL FRAMED SET CAN BE YOURS FOR ONLY US $4995 AS UONUS EACH ORDER WILL RECEIVE THREE ADDITIONAL COLLECTOR PINS FROM THE INTERNATIONAL FESTIVAL OF FLIGHT THESE FULL COLOR CLOISONNE PINS ARE OF SUCH HIGH QUALITY THAT WE ABSOLUTELY GUARANTEE YOUR SATISFACTION OR YOUR MONEY BACK Ehe authorized WAC88 pins available HOW TO ORDER SEND MO VISA MASTER CARD OR AMERICAN EXPRESS TT cRESTWOOD EMBLEMS PO BOX BOBS STN C EDMONTON ALBERTA CANADA T5B 4K6 US$4995 FOR EACH SET PLUS US$300 FOR POSTAGE AND HANDLING Toledo/Blakeslee Continued page 135 Ehe National Soaring Society again shared booth LSF just elec tion new officers hand President Bob Steele VP Ray Hayes Secre tary Jim Martin Treasurer Susie Lipp Representing NSS President Pete Carr DistricE Ill VP Ed Lightcap Sailplane community indeed fortu nate have such capable people serving both organizations group has exciting plans make Soaring bigger better us keep name LSF mailing list send card PO Box 647 Mundelein IL 60060 Bob Steeles address 10173 St Joe Rd Ft Wayne IN 46835 telephone 219 485-1145 youd like NSS info write Pete Carr 329 Little Ave Ridgeway PA 15053 telephone 814 772-4851 Magazines American model maga zines hand plus two British pub lishers Since probably already know about American ones Ill just say few words about British mags Argus Specialist Publications puts out two magazines interest Sailplaners Ra dio Control Models Electronics Ra dio Modeler used available through AMA just read ar rangement being dropped So now well have send checks directly Argus PO Box 35 Wolsey House Wolsey Road Hemel Hempstead Hertfordshire HP2 4SS England RM $3000 per year RCM&E $3100 Radio Control Model World easier deal because Traplet Publications has US office RCMW joy read maialy because Soaring column writ ten Sean Walbankalso White Sheet newsletter fame Sean corresponds about half Soaring clubs world material covers wide range ledo Special price $3000 per year tell BB sent shoald OK Write Traplet Distribution USA 1635 Wade Dr Paso Robles CA 93446 telephone 805 239-0997 Scale Model Research Bob Banka busy one-armed paper hanger selling Foto-Paaks Scale interest surging color pictures need finishing documentation Foto-Paaks contain 10 28 color shots air plane particular type Bob has Paaks 57 different Sailplanes 19 motor glid ers adding new ones time its good inquire hearts desire availableor coming SMRs address 2334 Ticonderoga Way Costa Mesa CA 92626 telephone 714 979-8058 Space Case easy-to-remember name line plastic cases can custom designed hold protect thing transmitters complete planes Space Cases also popular RC car crowd power fliers railroad ers 1987 US F3B Team used Space Cases planes winches other stuff Everything went Germany back fine shape Suggest contact Ma trix Enterprises 7015 Carroll Rd San Diego CA 92121 telephone 619 4509509 SR Batteries Larry Sribnick guy can supply nickel-cadmium pack might needbe transmitter re ceiver electric motor something else SR first offer high capacity packs will still custom make sort pack specifications Cells packs guaranteed form memory Larry says response customer demand single source batteries accessor ies now stocking high quality charg ers connectors motors hookup wire etc good service because beginners experts too often confused about batteries chargers full info send 45C pre-addressed return envelope SR Box 287 Bellport NY 11713 telephone 516 286-0079 Sailplane static competition seven Sailplanes enteredand two powered Come Sailplaners Lets show em beauties next year Mark Kummerow Chicago won second straight yearboth years flying wings Last year 200-in Ultra saur year 168-in PetraSaur inspiration both plane Gene Dees Icarosaur specs PetraSaur 168 span 11 chord 2070 sq area E-174/HQ 0010 airfoils 29 sweep 50 washout 10 dihe dral 15 winglet span 514 chord 80 sq area NACA 0009 airfoil 10 lb weight three channels controlling elevons flaps Construction foam carbon fiber balsa plywood spruce Ultracote MonoKote EconoKote Well done Mark Howd Ultrasaur go Second place went Troy Lawickis nicely finished Fiesta Multiplex kit third place new LSF trea surer Susie Lipp beautiful Windsong Susies ship has over 100 flights it looks better new ones Cant stand Radio Technique/Myers Continued page 43 SD 57013 605/987-5924 basic thing know about TRC Fast Charger thao monitors rate-of-change voltage pack being charged shuts off 1 detects quick voltage rise typical siEuatlon pack fully charged gas bubbles starting form 2 detects quick voltage drop typical fully charged cell going overcharge Because uses voltage-change monitoring does depend measuring absolute voltage TRC Fast Charger doesnt care cells pack same reason will fully charge cells old have high resistance certain cells havent charged couple months Try slow charging scrap have early model TRC Fast Charger can fooled shutting off before pack fully charged An easy way fool charger move around battery leads during charging session start prob ing around circuit voltmeter either procedures will cause enough change contact resistance present itself voltagechange monitoring circuit abrupt voltage rise drop Charging stops automatically Later models have desensitized ignore abrupt voltage changes Actually prefer charger shut off too soon action causes undercharging easily rectified Assuming know pack being charged exhausted know nominal capacity cell August 1988 139 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
Edition: Model Aviation - 1988/08
Page Numbers: 42, 43, 139, 140
George Myers Radio Thchnique 70 Froehllch Farm Rd Hkksvlile NY 11801 ABSTRACT Give up OWBAM systems TRC Fast Charger Ace RIC Overnighter use rec reational vehicles RVs CAUGHT lot flak mis-describing RCHA Gold Silver stickers being re quired March 1988 column Perhaps will accept apology major gaffe 145 columns attempt present news soon possible considering built-in threemonth publishing cycle delay jumped ahead AMA Executive Council decision havent made yet Bad reporting furor over stickers nothing com pared generated noting OWRAM old wideband AM systems should abandoned Now lets look real world Back 1983 gave OWBAMs eight years wear out Everybody knew what planned 1991 So have now entered transition phase RC environment moving mixed 40/80-kHz raster existed 1987 OWBAMs included toward full utili zation 50 channels FCC has given us OWBAMs both give receive un necessary interference Consider 1 use 50 channels planned FCC will almost certainly start assigning unused channels other users FCC reassigned top-end UHF TV chan nels TV industry didnt use six-meter Ham band used VHF TV Channel 1 Didnt ever wonder rotary TV tuners always start Channel 2 2 unused channels reassigned hang onto OWBAM RC systems can ex pect sec increase interference problems Right now enjoying reduced interfer ence 40-kHz environment relative what 80-kHz environment during 1980-83 period primarily because superior transmitters have sold 1983-87 period Based transmitter test results trade shows past five Nats estimate about half transmitters con test use today can qualify Gold stickers remainder can qualify Silver Whats left OWBAMs Perhaps used regularly sport fliers believe just sitting shelves Can prove Im wrong Narrow-band transmitters radiate less energy places RC receivers can interpret energy interference fact com bined intelligent flight station arrangements good impound procedures made life easier existing receivers hence reduced interfer ence cant stop job half done der make free use 50 channels assigned us resorting compensating flight line arrangements like Pacific Plan need have use narrow-band transmitters bet ter receivers Because 50 channels inter stitial other users channels 10 kHz away what really need re ceiver can survive real 100-channel/ 10kHz environment have chosen call imag mary receiver future narrow-band re ceiver name AMA has paid consultant define what need engineering terms can find published AMA Guidelines AMA News September October 1987 MA buy use narrow-band receivers available free use RC channels will possible What alternative Obviously can con tinue use outdated equipment want make special provisions such blanking out refusing use other legal channels necessary avoid interfering out dated equipment course chosen Australia about 15 years ago Canada five years ago few conversations people have received opinion thing tactic accomplished pro long use antiquated equipment thereby fru strating everybody Both countries have looking us United States America mod42 Model Aviation Ace RIC Overnighter essential part Georges traveling kit Internal programming iets charge battery packs ratings 250 500 900 1200 mAh constant current piugs vans cigar-lighter receptacie can used whether engine running Two transmitter two receiver packs charge simultaneousiy 14 hours TRC Fast Charger another vital part Georges traveiing kit its DC-to-DC converter output 24 VDC constant rate about 20 amps doesnt care Ni-Cd ceiis battery wiil charge up 12 ceils capacities 250 1200 mAh elers vast purchasing power force de velopment better 72 MHz RC systems People protecting OWBAM radios say wont give up system works perfectly well sound like people wouldnt give up perfectly good regenerative receiver back Sixties moved single 27 MHz RC channel five channels regens suffering interference newer narrow-band crystal-controlled systems also refused give up reed systems 27 MHz Seventies digital radio came along four new channels 72 MHz plus 75640 refused convert OWBAM sets 1983 added 11 new channels now say wont give up 1991 support 50 channels have Want bet Field charging battery packs will travel Alaska summer will live van much possible purpose have fitted out amenities RV As happens have few Ni-Cd-powered devices keep charged such single-cell glow-plug heater two-cell flashlight two-cell electric shaver two-cell electric screwdriver also us able drill two-cell electric soldering iron several four-cell flight packs seven-cell elec tric motor pack quiet flying couple eightand nine-cell transmitter packs 10-cell VCR pack 12 VDC motorcycle battery en gine starting Obviously device came charger plugs 110 VAC supply could bring along stack chargersif some 110 VAC source plug would work well either visiting friends motel campsite 1 lO-VAC hookup what about other times might use inverter changes 12 VDC 110 VAC As happens have thema 200-watt unit draws 24 amps doing putting 50 mA flight pack Burn 34 amp-hours put our 500 mAh flight pack just cant live kind power waste Want buy invertercheap almost universal charger what call TRC Fast Charger $78 hipping made TRC Engineering 10972 10th Ave Grand Rap ids MI 49504 616 453-8257 takes 20 24 amps out 12 VDC supply depending type number cells being charged pumps up 500-mAh pack about 15 min utes Thats about hour out 12 VDC source hour flight packvery efficient TRC advertised being useful charging Ni-Cd packs constructed 12 cells cells can rated 250 mAh 1200 mAh can because DC-DC converter output 24 VDC constant charging rate about 20 amps cause has 24 VDC output also capable fast-charging 12 VDC wet lead-acid batteries beware customary dangers water consumption evolution hydrogen gas possibility sulfuric acid splashes Ive used TRC Fast Charger above works dont use ThC gel cells Gel cells dont like charged two-amp rate use CaRa Automatic 12-Volt Charger set hold 1365 VDC Gel Cell requires 110 VAC source does best job know live fact CaRa Products Canton Continued page 139 WILLIAMS ACCESSORIES BROTHERS 4 PILOTS STANDARD TSMAN RACING TARY WHEELS AGE TH CONTOUR BALLOON EN AGE 4 ENGINES PRATT & WHITNEY HT HONE cipteclac~ons Autno~Pv ItVOKS SP 80ds90 9898~ ca ot mote 1~taPd 9edce~ 00V40 $ a S s9 9 0b SP Vo S/N&Jflflhii RID ID WE IRENE OOI R~d oodeo CA 93422 466-1717 August 1988 43 SEND $3 FOR FULLY ILLUSTRATED CATALOG IAWNEE ST SAN MARCOS CALIFORNIA 92069 PARABELLUM LLAS DISTRIBUTED BY THE WORLD IS FLYING 1N RED DEER IN 1988 AUGUST 1 13th ORLD CHAMPIONSHIP AND YOU CAN BE PART OF THIS WORLD CLASS EVENT BY OWNING YOUR OWN SET OF OFFICIAL COMMEMORATIVE PINS POPULAR AVIATION ARTIST JOHN P FERGUSON HAS DESIGNED SEVEN PINS EXCLUSIVELY FOR WAC 88 DEPICTING THE OFFICIAL LOGO AND SIX COMPETING COUNTRIES THIS BEAUTIFUL FRAMED SET CAN BE YOURS FOR ONLY US $4995 AS UONUS EACH ORDER WILL RECEIVE THREE ADDITIONAL COLLECTOR PINS FROM THE INTERNATIONAL FESTIVAL OF FLIGHT THESE FULL COLOR CLOISONNE PINS ARE OF SUCH HIGH QUALITY THAT WE ABSOLUTELY GUARANTEE YOUR SATISFACTION OR YOUR MONEY BACK Ehe authorized WAC88 pins available HOW TO ORDER SEND MO VISA MASTER CARD OR AMERICAN EXPRESS TT cRESTWOOD EMBLEMS PO BOX BOBS STN C EDMONTON ALBERTA CANADA T5B 4K6 US$4995 FOR EACH SET PLUS US$300 FOR POSTAGE AND HANDLING Toledo/Blakeslee Continued page 135 Ehe National Soaring Society again shared booth LSF just elec tion new officers hand President Bob Steele VP Ray Hayes Secre tary Jim Martin Treasurer Susie Lipp Representing NSS President Pete Carr DistricE Ill VP Ed Lightcap Sailplane community indeed fortu nate have such capable people serving both organizations group has exciting plans make Soaring bigger better us keep name LSF mailing list send card PO Box 647 Mundelein IL 60060 Bob Steeles address 10173 St Joe Rd Ft Wayne IN 46835 telephone 219 485-1145 youd like NSS info write Pete Carr 329 Little Ave Ridgeway PA 15053 telephone 814 772-4851 Magazines American model maga zines hand plus two British pub lishers Since probably already know about American ones Ill just say few words about British mags Argus Specialist Publications puts out two magazines interest Sailplaners Ra dio Control Models Electronics Ra dio Modeler used available through AMA just read ar rangement being dropped So now well have send checks directly Argus PO Box 35 Wolsey House Wolsey Road Hemel Hempstead Hertfordshire HP2 4SS England RM $3000 per year RCM&E $3100 Radio Control Model World easier deal because Traplet Publications has US office RCMW joy read maialy because Soaring column writ ten Sean Walbankalso White Sheet newsletter fame Sean corresponds about half Soaring clubs world material covers wide range ledo Special price $3000 per year tell BB sent shoald OK Write Traplet Distribution USA 1635 Wade Dr Paso Robles CA 93446 telephone 805 239-0997 Scale Model Research Bob Banka busy one-armed paper hanger selling Foto-Paaks Scale interest surging color pictures need finishing documentation Foto-Paaks contain 10 28 color shots air plane particular type Bob has Paaks 57 different Sailplanes 19 motor glid ers adding new ones time its good inquire hearts desire availableor coming SMRs address 2334 Ticonderoga Way Costa Mesa CA 92626 telephone 714 979-8058 Space Case easy-to-remember name line plastic cases can custom designed hold protect thing transmitters complete planes Space Cases also popular RC car crowd power fliers railroad ers 1987 US F3B Team used Space Cases planes winches other stuff Everything went Germany back fine shape Suggest contact Ma trix Enterprises 7015 Carroll Rd San Diego CA 92121 telephone 619 4509509 SR Batteries Larry Sribnick guy can supply nickel-cadmium pack might needbe transmitter re ceiver electric motor something else SR first offer high capacity packs will still custom make sort pack specifications Cells packs guaranteed form memory Larry says response customer demand single source batteries accessor ies now stocking high quality charg ers connectors motors hookup wire etc good service because beginners experts too often confused about batteries chargers full info send 45C pre-addressed return envelope SR Box 287 Bellport NY 11713 telephone 516 286-0079 Sailplane static competition seven Sailplanes enteredand two powered Come Sailplaners Lets show em beauties next year Mark Kummerow Chicago won second straight yearboth years flying wings Last year 200-in Ultra saur year 168-in PetraSaur inspiration both plane Gene Dees Icarosaur specs PetraSaur 168 span 11 chord 2070 sq area E-174/HQ 0010 airfoils 29 sweep 50 washout 10 dihe dral 15 winglet span 514 chord 80 sq area NACA 0009 airfoil 10 lb weight three channels controlling elevons flaps Construction foam carbon fiber balsa plywood spruce Ultracote MonoKote EconoKote Well done Mark Howd Ultrasaur go Second place went Troy Lawickis nicely finished Fiesta Multiplex kit third place new LSF trea surer Susie Lipp beautiful Windsong Susies ship has over 100 flights it looks better new ones Cant stand Radio Technique/Myers Continued page 43 SD 57013 605/987-5924 basic thing know about TRC Fast Charger thao monitors rate-of-change voltage pack being charged shuts off 1 detects quick voltage rise typical siEuatlon pack fully charged gas bubbles starting form 2 detects quick voltage drop typical fully charged cell going overcharge Because uses voltage-change monitoring does depend measuring absolute voltage TRC Fast Charger doesnt care cells pack same reason will fully charge cells old have high resistance certain cells havent charged couple months Try slow charging scrap have early model TRC Fast Charger can fooled shutting off before pack fully charged An easy way fool charger move around battery leads during charging session start prob ing around circuit voltmeter either procedures will cause enough change contact resistance present itself voltagechange monitoring circuit abrupt voltage rise drop Charging stops automatically Later models have desensitized ignore abrupt voltage changes Actually prefer charger shut off too soon action causes undercharging easily rectified Assuming know pack being charged exhausted know nominal capacity cell August 1988 139 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