RADIO CONTROL ELECTRICS months topics include meet announcement some new products 97 SR Seminar program overlooked speed control problem some interesting reader input Eleventh Annual DEAF Fly-In will held October 4-5 Dallas TX RC Club Field Seagoville meet offers some AMA events 610 612 618 plus some fun-fly pursuits including lightest RC Electric fly 10 minutes seven-cell lifting maybe AULD Up Last Down info contact contest director Greg Judy 817 468-0962 75267224tompuservecom can also contact Frank Korman 214 327-8411 FmanKorman0cccdedu Dallas Electric Aircraft fliers website http/web2airmailnetlwarnerl/deaf/ Tom Hunt head modeler Modelair-Tech Box 1467 Lake Grove NY 11755-0898 Tel/Fax 516 981-0372 E-mail thunt95147@aolcom has released info new H-l00 belt drive designed especially Speed 400-class motors Example motors include Graupner Speed 400 Kyosho AP-29 drive sturdy assembly having i/is output shaft dual ball bearings number ratios ranging 257 48 available Price $3995 less prop adapter shipping Azarr fun-fly fame sent some samples control horns designed Speed 400-class designs magnificently die-cut apparently laser 46 plywood intended glued place Pricing $250 six including postage Speed 400 Specialities 1750 Lundgren Rd New Carlisle OH 45344 Tel 937 849-0418 Gene Norman 166 Panhandle Cr Maysville GA 30558 does have product sell does offer freebie full-size two-view drawing Graupner Speed 400/belt drive assembly intended plan-overlay assist planning own motor installation Gene will happily send anyone sends SASE Larry Sribnick SR Batteries has announced plans annual SR Seminar held Friday KRC Electric fly weekend September 19-2 1 Allentown PA Hilton Scheduled presentations include Getting Most out Batteries Lany Larger Gas Conversions Steve Anthony History AstroFlight Electric Flight Bob Boucher Multimotor Power System Installations Keith Shaw Running Speed 400 Pylon Event Bill Griggs Nonlinear Speed Controls Bob Kopski Larry also hosting Friday evening bring brag anyone can bring favorite show-and-tell present Everyone gets chance speak will awards technical achievement years affair will occupy two joined ballroomslots mom previously available Hilton located Allentown about ten minutes fmm Queen City Airport KRC site Seminar has filled recent years suggest contact Larry SR Batteries Inc Box 287 Beilport NY 11713 Tel [516] 286-0079 reservations Electronic Speed Control discussion could fill book itself theres always September 1997 99 Sam Devonshire Warminster PA Miss Philadelphia OldTimer Geared Astro 05 eight 17s 80 ounces Novice modeler Ward Brown Quakertown PA won Astro Porterfield kit KRC Electric Fly Raffle EZFLY another KRC Raffle model Has 600 square inches Master Airscrew system six 17s Excellent beginners Out-of-this-world original Don Fox Mars PA Short successful flight radio problems metalized covering Carbon Loins Sept 31 1997 10 ntr9syerpaca9e 48 entFxs Width 025 0375 05 10 RepSaie $1850$1390 $2000$1500 $2500$1875 $4000$3000 $2500$1875 $2750$2065 $3500$2625 $6000$4500 n Save up 25% popu Car sizes Ortfer Now Sate TnXs Thickness _________ 0 007 0 007 0014025 00140375 001405 0014-10 U Orders under $50 add $5 handling except CST Savers Club Members VISA Mastercard Discover American Express accepted Shipping $3 Priority Mail additional Calif residents add 725% sales tax Order Toll Free 1-800-338-1278 E-mail cst@tniinetcom Web Site httpIiwwwcstsaIeScom Composite Structures Technology P 0 Box 642 Dept JP Tehachapi CA g3581-0642 information forthcoming Some needed cofittiluing influx new Electric modelers some driven continuing arrival new products now theres something has covered recently received letter Neil Whitman frustrated adjustment problem two-screw analog ESC wrote to several manufacturers Over years Ive familiar quandary described guess always took granted everyone knew about Its hard beheve lack realization never covered matter past columns worse dont recall reading about anywhere two-screw analog electronic speed control classic ESC approach going back almost two decades has two adjustments variously named different manufacturers intended penmt adjusting control operation fit transmitter throttle signal characteristics principle two adjustments intended permit setting both limit points low high ends stick effectivitywhere [on stick position] motor begins turn reaches full power sounds good adjustment procedure can real test patience because typically two Only Th@ 3 US Hobby Full Line Model Airplanes Helicopters Boats Cars II JAGUAR 40 ARF Wing Span 48 Length 40 Weight 48 lbs 5 7 lbs Item#855B PIPER CUB J-3/ARF 40 Y5LOW/ ALL WOOD CONAT 5M Wing Span 67 Length 43ii59B Weight 79 lbs ltemv8S7 ur DEALERS AND DISTRIBUTORS INQUIRIES WELCOME flRDERLRDLY 1-800249-0544 INFOHEIATION 1-201460-0544 OUR FAX LINE 1-2014604770 WE ACCEPT VISA hASTEN CARD & DISCOVER CARDS PRICES SUEJECT TO CHANGE WITHOUT NOTICE STORE HOURS MONDAY THRU THURSDAY 1OAM TO 7PM FRIDAY 19 AM TO 9PM SATURDAYS 10 AM TO 4PM PACKAGING AND SHIPPING FEE S5 50 NEW JERSEY RESIDENTS ADD 6% SALES TAX US HOBBY INC 200 MOONACHIE AVE MOONACHIE NJ 07074 SKY BABY-S/ ARF 25-35 2C TRAINER SM-I Wing Span 515 Length 36 Weight 33 lbs ltems852 US HOBBY INC 100 Model Aviation xperimental bumpy section RevoltI-sized wing Very simple construction Author cant tell difference conventional construction air II JAGUAR 4OIARF 40 51 SPORTS ALL TRIM PAINTED NO DECALS Wing Span 48 Length 40 Weight 48 lbs -57 lbs Itemv865A r PIPER CUB J-3/ARC 25-35 ALL WOOD CONST sM-i Wing Span 54 Length 3S7AUS Weight 3 5lbs ltemvB57N SIY BABYL/ARF 25- 35 2C TRAINER Wing Span 51 5 Length 36 Weight 3 3 lbs ltemvOS4 FIRE FLY ARF 10-15 2C GLOW INTHE DARK AFTER SUNSET sM Wing Span 40 Length 347 $51 9 Weigh 22 Ibs- 24 lbs Item #940 SSt9W Longer flight times. .are just phone call away Just because radio system came SOOmab battery pack doesnt mean have fly 500mah pack Todays transmitters servos draw current ever before However radio systems still come SOOmah 600mah battery packs Although electronics todays transmitters have changed dramatically battery packs come havent changed much last 15 years As have always said best radio gear. no better its battery pack SR 850 Series transmitter packs same size weight standard SOQmah pack will give full 900mah capacity means youll get almost twice flying time SR 850 Series transmitter pack did pack came transmitter theyll fit Airtronics Futaba JR transmitter ever made comes receiver packs can give pack SOQmah lOOmah 1 400mah thats slightly larger heavier original 500mah pack need 500mah pack 500 Series pack almost half size ordinary SOOmah pack yet has capacity S75mahl youd like information have question drop us note SR Batteries Inc Box 287 Bellport NY 11713 Fax 516-286-0901 Email 74167751@compuservecom call 516-286-0079 between 9am 5pm EST adjustments interact example set screw low-throttle position second high end youre likely find first setting has changed readjust first second adjustment will off somewhat screws interactivea back-and-forth trip ever convergence always possible some understanding patience Analog speed-control designs can broken two basic circuit approaches circuit technique measures width incoming signal pulse receiverjust like servo ESC electronics use information adjust voltage applied motornot unlike servo uses same info set output horn position output response motor speed servo position governed transmitted pulse width governed stick position signal pulse repeated signal sent again again frame rate transmitter Typical frame rates fixed somewhere over range 40-50 Hertz commanding signal repeated refreshed 40-50 times second depending equipment manufacturer Thus ESC servo continually gets lots lots command information form stick-controlled pulse width PCM transmitters operate somewhat differently Typical values pulse-width variation stick trim throw about two milliseconds some small differences among manufacturers time between pulses dictated frame rate typically ranges 25-20 milliseconds frame rates 40-50 Hz respectively actual information-carrying time period pulse width present small fraction total elapsed time Think signal pulse constantly repeating short blip time other speed-control circuit technique Some manufacturers use circuit approach uses both off periods transmitted signal pulse produce averaged signal used ESC ultimately control motor voltage separate complex story its own Both transmitted pulse width time between pulses frame rate combine form signal information used ESC pulse width considered primary source information relating stick position fixed frame rate also player ESC response Ordinarily no problem would aware detail would simply adjust ESC screws proper operation particular transmitter go fly However confusion frustration can easily happen may later install same ESC different radio system may set up ESC beforehand servo dnver other signal sources have different frame rates ESC control range will also varyno matter similarity transmitted pulse width may give appearance ESC adjustment has changed fact has what happened Neiland several times until caught nothing wrong design approach respected products have used including Astro Aveox Steve Neu now realize should have covered topic past heres hoping will find information useful now Life full should haves hindsight should have covered matter onceand should other authors Shame us collectively thanks Neil illuminating dark information void April 97 column discussed throttle emphasis idea now basis some new products portion 97 SR Seminar reader interest building own ESCs Two readers have indicated interest presenting ESC construction articles have encouraged both regard Readers coming two directions some like design use own speed controls others simply want build own published information two reader inputsboth analog designsone described unusual clever circuit component/technique knowledge first design uses signal pulse width information described two-screw design little iionLrOlIer Aveox Inc 31324 Via Golinas #103 Westlake Village CA 9162 Phone 8185978915 ax818 5970617 httpllwwwaveoxcom info@aveoxcom 102 Model Aviation ormance Brushless DC Motors addihon line high performance Brushless motors Aveoo now oftenog full line kds have machined tat parts made USA Aveos has tomplete line diroct drive goarod motors competitor sport flyer starting law us$200 motar/canfroller system Call Catalog new 20 oz 12 MOSFET Hi Pert ormance Hvhridrivo Microprocessor hued controller Availahlv special Introductory Price ot $15995 Far very limited timol 6-16 cola 604810 Optocouplng lofty nrogmmmablel _ENGINEERING 6917W 59th street chicago Illinois 60638 Phone 312 586-8503 Fax 312 586-8556 ElevonMixer ELECTRONIC MIXER elevoos v-tails flaps spoilers Ultra-simple setup installation Rugged microprocessorbased design 100% electronic high reli ability Simply consents between servos receiver Features semo reversing aod tour different mising rates allow tailor miser seeds ot model Will overdrive names options selected simple dip swdch Made USA aed designed work popular radio systemsAM PM aed PCM Very low power consumplion Size 16 o 0R o 04 Weight 02Ssz Less radio ounnectore Part No OA 53095 less conneotere 53885 complete AccessorySwitch GlowDriver ON-BOARD GLOW DRIVER makes starting easier sefer Keeps glow plug hot lust engine needs Micreproc essor-baned design simply connects between throttle semo receiver Reversi ble user-selectable en ott points Can easily drive two-cylinder twin-engine medals Unit automatically turns ott transmitter ott 100% electronic Made USA designed work popular radio systems Very small size 17 o 12 o 04 Weight Sdoz Low power consumption Comes battery/plug wire less connectors cell plug clip Pert Na OA $3495 ThrottleSwitch THROT small meds set need tally propor tinsel opeed control required ability tam motor er op atitude tsr The Tl gent microprocesnor-b jatores ch edicator light aid siren bagery low auto-timer nor motor ran duration ot 15 ecoroht Safety teaturan prc unit trom turning woen arming switch pressed Made tha USA designed worh popatar radio systems Small size 21 o 09 5 05 Weight S7hez 6-7 cells 30 amps continseus Less csenectors Pert Na TSO1OA $4095 PO 6ox3129 CoepsuCaniss TX78463-3129Seadlcr OOoERs& lNro 512 81d-6843lOaM7Pu DAILY CT FREE add $4511 S&H per order TX res add 775% tan Cusnuace Scostor FAX & APrre Noons 512 814-5843Cetalcit w interaction did include emphasis shaped response transfer function second reader went far send complete circuit design details ESC also uses unique two-screw~ circuit approach includes shaped transfer curve motivated April column design also uses transmitted pulse width input information case Id view twoscrew behavior about normalhaving usual interactivity above going continuing play own ESC version includes transfer shaping noninteractive two-screw adjustment behavior ESC approach reacts average pulse width frame period signal Admittedly two designs above simpler smaller what Im pursuing Its amazing transfer-shaping technique reader conceptually identical no prior communication matter Stay tuned Wayne Westra Allen Park Michigan wrote reaction January 97 column discussion about condition charger source batteries what happens run down Wayne tells product called Battery Buddyan automatic cutoff device used conjunction auto battery disconnect load battery reaches predetermined low voltage battery accessories can found automotive stores Sounds like way assure getting home field after busy day E flying enjoyment Thanks Wayne Charlie Sylvia has announced retirement planned closing CS Flight Systems Charlie has favorite Electric supplier regular KRC Electric Fly attendee years now heading south best Charlie Connie Maybe Connie will finally get fly blue Skyvolt 1/90 MA cover won KRC Raffle So concludes August column Please continue joyful rewarding pursuit Electric flight please include SASE correspondence youd like reply Model Aviation elize Its Awesome Up 50% Same Easy Starting No Glow Plugs Runs llvice Long Scale Sound P0 Box 141 Dep* MA Milford CT 06460 203-87 complete information packet send $400 credit apphed first order avadable planes cern awo seam Icarter wrde detado Long-EZ Looking Something unique 0 canard pusher may look otrange dont worty flies just like conventional airplane Wont otalll strakes tibergiouo canopy cowl wheel posts Foam core wings canard IncludeS moot hardware $185 pan 40 engineslinviudes uninpino oonnnnnra v01 Kerr Aircraft P0 Box 2554 Newport RI 02840 401 -847-7510 E-mail ksrrai19@nficom RC Flight Training Beginner advanced tailored indMdual long-time modeler full size airplane flight instruc tor will make progress fun easy during week stay beautiful far western North Carolina Write call information RC Flight Training 1635 Setawig Rd Brasstown NC 28902 704-389-8968 SCALE CATALOGS SPPS 160 SUperaCale Constnjctiorl Plaits$500 SPPS 120060 Docunentalion PhotCa 3VS$500 ASP Model Airont Constnction Prst$500 ASP Scale AJro-stft Drmngs 3VS$500 Add $500 ES Air OVerseas 1/5 Sc WINNIE MAE 100 2 PC Wing Plans $3700 LOCKHEED VEGA Jim Pepinos SCALE PLANS & PHOTO SERVICE 3209 Madison Ave Greensboro NC 27403 VisalMCPHONE/FAX 910 292-5239
Edition: Model Aviation - 1997/09
Page Numbers: 99, 100, 102, 104
Edition: Model Aviation - 1997/09
Page Numbers: 99, 100, 102, 104
RADIO CONTROL ELECTRICS months topics include meet announcement some new products 97 SR Seminar program overlooked speed control problem some interesting reader input Eleventh Annual DEAF Fly-In will held October 4-5 Dallas TX RC Club Field Seagoville meet offers some AMA events 610 612 618 plus some fun-fly pursuits including lightest RC Electric fly 10 minutes seven-cell lifting maybe AULD Up Last Down info contact contest director Greg Judy 817 468-0962 75267224tompuservecom can also contact Frank Korman 214 327-8411 FmanKorman0cccdedu Dallas Electric Aircraft fliers website http/web2airmailnetlwarnerl/deaf/ Tom Hunt head modeler Modelair-Tech Box 1467 Lake Grove NY 11755-0898 Tel/Fax 516 981-0372 E-mail thunt95147@aolcom has released info new H-l00 belt drive designed especially Speed 400-class motors Example motors include Graupner Speed 400 Kyosho AP-29 drive sturdy assembly having i/is output shaft dual ball bearings number ratios ranging 257 48 available Price $3995 less prop adapter shipping Azarr fun-fly fame sent some samples control horns designed Speed 400-class designs magnificently die-cut apparently laser 46 plywood intended glued place Pricing $250 six including postage Speed 400 Specialities 1750 Lundgren Rd New Carlisle OH 45344 Tel 937 849-0418 Gene Norman 166 Panhandle Cr Maysville GA 30558 does have product sell does offer freebie full-size two-view drawing Graupner Speed 400/belt drive assembly intended plan-overlay assist planning own motor installation Gene will happily send anyone sends SASE Larry Sribnick SR Batteries has announced plans annual SR Seminar held Friday KRC Electric fly weekend September 19-2 1 Allentown PA Hilton Scheduled presentations include Getting Most out Batteries Lany Larger Gas Conversions Steve Anthony History AstroFlight Electric Flight Bob Boucher Multimotor Power System Installations Keith Shaw Running Speed 400 Pylon Event Bill Griggs Nonlinear Speed Controls Bob Kopski Larry also hosting Friday evening bring brag anyone can bring favorite show-and-tell present Everyone gets chance speak will awards technical achievement years affair will occupy two joined ballroomslots mom previously available Hilton located Allentown about ten minutes fmm Queen City Airport KRC site Seminar has filled recent years suggest contact Larry SR Batteries Inc Box 287 Beilport NY 11713 Tel [516] 286-0079 reservations Electronic Speed Control discussion could fill book itself theres always September 1997 99 Sam Devonshire Warminster PA Miss Philadelphia OldTimer Geared Astro 05 eight 17s 80 ounces Novice modeler Ward Brown Quakertown PA won Astro Porterfield kit KRC Electric Fly Raffle EZFLY another KRC Raffle model Has 600 square inches Master Airscrew system six 17s Excellent beginners Out-of-this-world original Don Fox Mars PA Short successful flight radio problems metalized covering Carbon Loins Sept 31 1997 10 ntr9syerpaca9e 48 entFxs Width 025 0375 05 10 RepSaie $1850$1390 $2000$1500 $2500$1875 $4000$3000 $2500$1875 $2750$2065 $3500$2625 $6000$4500 n Save up 25% popu Car sizes Ortfer Now Sate TnXs Thickness _________ 0 007 0 007 0014025 00140375 001405 0014-10 U Orders under $50 add $5 handling except CST Savers Club Members VISA Mastercard Discover American Express accepted Shipping $3 Priority Mail additional Calif residents add 725% sales tax Order Toll Free 1-800-338-1278 E-mail cst@tniinetcom Web Site httpIiwwwcstsaIeScom Composite Structures Technology P 0 Box 642 Dept JP Tehachapi CA g3581-0642 information forthcoming Some needed cofittiluing influx new Electric modelers some driven continuing arrival new products now theres something has covered recently received letter Neil Whitman frustrated adjustment problem two-screw analog ESC wrote to several manufacturers Over years Ive familiar quandary described guess always took granted everyone knew about Its hard beheve lack realization never covered matter past columns worse dont recall reading about anywhere two-screw analog electronic speed control classic ESC approach going back almost two decades has two adjustments variously named different manufacturers intended penmt adjusting control operation fit transmitter throttle signal characteristics principle two adjustments intended permit setting both limit points low high ends stick effectivitywhere [on stick position] motor begins turn reaches full power sounds good adjustment procedure can real test patience because typically two Only Th@ 3 US Hobby Full Line Model Airplanes Helicopters Boats Cars II JAGUAR 40 ARF Wing Span 48 Length 40 Weight 48 lbs 5 7 lbs Item#855B PIPER CUB J-3/ARF 40 Y5LOW/ ALL WOOD CONAT 5M Wing Span 67 Length 43ii59B Weight 79 lbs ltemv8S7 ur DEALERS AND DISTRIBUTORS INQUIRIES WELCOME flRDERLRDLY 1-800249-0544 INFOHEIATION 1-201460-0544 OUR FAX LINE 1-2014604770 WE ACCEPT VISA hASTEN CARD & DISCOVER CARDS PRICES SUEJECT TO CHANGE WITHOUT NOTICE STORE HOURS MONDAY THRU THURSDAY 1OAM TO 7PM FRIDAY 19 AM TO 9PM SATURDAYS 10 AM TO 4PM PACKAGING AND SHIPPING FEE S5 50 NEW JERSEY RESIDENTS ADD 6% SALES TAX US HOBBY INC 200 MOONACHIE AVE MOONACHIE NJ 07074 SKY BABY-S/ ARF 25-35 2C TRAINER SM-I Wing Span 515 Length 36 Weight 33 lbs ltems852 US HOBBY INC 100 Model Aviation xperimental bumpy section RevoltI-sized wing Very simple construction Author cant tell difference conventional construction air II JAGUAR 4OIARF 40 51 SPORTS ALL TRIM PAINTED NO DECALS Wing Span 48 Length 40 Weight 48 lbs -57 lbs Itemv865A r PIPER CUB J-3/ARC 25-35 ALL WOOD CONST sM-i Wing Span 54 Length 3S7AUS Weight 3 5lbs ltemvB57N SIY BABYL/ARF 25- 35 2C TRAINER Wing Span 51 5 Length 36 Weight 3 3 lbs ltemvOS4 FIRE FLY ARF 10-15 2C GLOW INTHE DARK AFTER SUNSET sM Wing Span 40 Length 347 $51 9 Weigh 22 Ibs- 24 lbs Item #940 SSt9W Longer flight times. .are just phone call away Just because radio system came SOOmab battery pack doesnt mean have fly 500mah pack Todays transmitters servos draw current ever before However radio systems still come SOOmah 600mah battery packs Although electronics todays transmitters have changed dramatically battery packs come havent changed much last 15 years As have always said best radio gear. no better its battery pack SR 850 Series transmitter packs same size weight standard SOQmah pack will give full 900mah capacity means youll get almost twice flying time SR 850 Series transmitter pack did pack came transmitter theyll fit Airtronics Futaba JR transmitter ever made comes receiver packs can give pack SOQmah lOOmah 1 400mah thats slightly larger heavier original 500mah pack need 500mah pack 500 Series pack almost half size ordinary SOOmah pack yet has capacity S75mahl youd like information have question drop us note SR Batteries Inc Box 287 Bellport NY 11713 Fax 516-286-0901 Email 74167751@compuservecom call 516-286-0079 between 9am 5pm EST adjustments interact example set screw low-throttle position second high end youre likely find first setting has changed readjust first second adjustment will off somewhat screws interactivea back-and-forth trip ever convergence always possible some understanding patience Analog speed-control designs can broken two basic circuit approaches circuit technique measures width incoming signal pulse receiverjust like servo ESC electronics use information adjust voltage applied motornot unlike servo uses same info set output horn position output response motor speed servo position governed transmitted pulse width governed stick position signal pulse repeated signal sent again again frame rate transmitter Typical frame rates fixed somewhere over range 40-50 Hertz commanding signal repeated refreshed 40-50 times second depending equipment manufacturer Thus ESC servo continually gets lots lots command information form stick-controlled pulse width PCM transmitters operate somewhat differently Typical values pulse-width variation stick trim throw about two milliseconds some small differences among manufacturers time between pulses dictated frame rate typically ranges 25-20 milliseconds frame rates 40-50 Hz respectively actual information-carrying time period pulse width present small fraction total elapsed time Think signal pulse constantly repeating short blip time other speed-control circuit technique Some manufacturers use circuit approach uses both off periods transmitted signal pulse produce averaged signal used ESC ultimately control motor voltage separate complex story its own Both transmitted pulse width time between pulses frame rate combine form signal information used ESC pulse width considered primary source information relating stick position fixed frame rate also player ESC response Ordinarily no problem would aware detail would simply adjust ESC screws proper operation particular transmitter go fly However confusion frustration can easily happen may later install same ESC different radio system may set up ESC beforehand servo dnver other signal sources have different frame rates ESC control range will also varyno matter similarity transmitted pulse width may give appearance ESC adjustment has changed fact has what happened Neiland several times until caught nothing wrong design approach respected products have used including Astro Aveox Steve Neu now realize should have covered topic past heres hoping will find information useful now Life full should haves hindsight should have covered matter onceand should other authors Shame us collectively thanks Neil illuminating dark information void April 97 column discussed throttle emphasis idea now basis some new products portion 97 SR Seminar reader interest building own ESCs Two readers have indicated interest presenting ESC construction articles have encouraged both regard Readers coming two directions some like design use own speed controls others simply want build own published information two reader inputsboth analog designsone described unusual clever circuit component/technique knowledge first design uses signal pulse width information described two-screw design little iionLrOlIer Aveox Inc 31324 Via Golinas #103 Westlake Village CA 9162 Phone 8185978915 ax818 5970617 httpllwwwaveoxcom info@aveoxcom 102 Model Aviation ormance Brushless DC Motors addihon line high performance Brushless motors Aveoo now oftenog full line kds have machined tat parts made USA Aveos has tomplete line diroct drive goarod motors competitor sport flyer starting law us$200 motar/canfroller system Call Catalog new 20 oz 12 MOSFET Hi Pert ormance Hvhridrivo Microprocessor hued controller Availahlv special Introductory Price ot $15995 Far very limited timol 6-16 cola 604810 Optocouplng lofty nrogmmmablel _ENGINEERING 6917W 59th street chicago Illinois 60638 Phone 312 586-8503 Fax 312 586-8556 ElevonMixer ELECTRONIC MIXER elevoos v-tails flaps spoilers Ultra-simple setup installation Rugged microprocessorbased design 100% electronic high reli ability Simply consents between servos receiver Features semo reversing aod tour different mising rates allow tailor miser seeds ot model Will overdrive names options selected simple dip swdch Made USA aed designed work popular radio systemsAM PM aed PCM Very low power consumplion Size 16 o 0R o 04 Weight 02Ssz Less radio ounnectore Part No OA 53095 less conneotere 53885 complete AccessorySwitch GlowDriver ON-BOARD GLOW DRIVER makes starting easier sefer Keeps glow plug hot lust engine needs Micreproc essor-baned design simply connects between throttle semo receiver Reversi ble user-selectable en ott points Can easily drive two-cylinder twin-engine medals Unit automatically turns ott transmitter ott 100% electronic Made USA designed work popular radio systems Very small size 17 o 12 o 04 Weight Sdoz Low power consumption Comes battery/plug wire less connectors cell plug clip Pert Na OA $3495 ThrottleSwitch THROT small meds set need tally propor tinsel opeed control required ability tam motor er op atitude tsr The Tl gent microprocesnor-b jatores ch edicator light aid siren bagery low auto-timer nor motor ran duration ot 15 ecoroht Safety teaturan prc unit trom turning woen arming switch pressed Made tha USA designed worh popatar radio systems Small size 21 o 09 5 05 Weight S7hez 6-7 cells 30 amps continseus Less csenectors Pert Na TSO1OA $4095 PO 6ox3129 CoepsuCaniss TX78463-3129Seadlcr OOoERs& lNro 512 81d-6843lOaM7Pu DAILY CT FREE add $4511 S&H per order TX res add 775% tan Cusnuace Scostor FAX & APrre Noons 512 814-5843Cetalcit w interaction did include emphasis shaped response transfer function second reader went far send complete circuit design details ESC also uses unique two-screw~ circuit approach includes shaped transfer curve motivated April column design also uses transmitted pulse width input information case Id view twoscrew behavior about normalhaving usual interactivity above going continuing play own ESC version includes transfer shaping noninteractive two-screw adjustment behavior ESC approach reacts average pulse width frame period signal Admittedly two designs above simpler smaller what Im pursuing Its amazing transfer-shaping technique reader conceptually identical no prior communication matter Stay tuned Wayne Westra Allen Park Michigan wrote reaction January 97 column discussion about condition charger source batteries what happens run down Wayne tells product called Battery Buddyan automatic cutoff device used conjunction auto battery disconnect load battery reaches predetermined low voltage battery accessories can found automotive stores Sounds like way assure getting home field after busy day E flying enjoyment Thanks Wayne Charlie Sylvia has announced retirement planned closing CS Flight Systems Charlie has favorite Electric supplier regular KRC Electric Fly attendee years now heading south best Charlie Connie Maybe Connie will finally get fly blue Skyvolt 1/90 MA cover won KRC Raffle So concludes August column Please continue joyful rewarding pursuit Electric flight please include SASE correspondence youd like reply Model Aviation elize Its Awesome Up 50% Same Easy Starting No Glow Plugs Runs llvice Long Scale Sound P0 Box 141 Dep* MA Milford CT 06460 203-87 complete information packet send $400 credit apphed first order avadable planes cern awo seam Icarter wrde detado Long-EZ Looking Something unique 0 canard pusher may look otrange dont worty flies just like conventional airplane Wont otalll strakes tibergiouo canopy cowl wheel posts Foam core wings canard IncludeS moot hardware $185 pan 40 engineslinviudes uninpino oonnnnnra v01 Kerr Aircraft P0 Box 2554 Newport RI 02840 401 -847-7510 E-mail ksrrai19@nficom RC Flight Training Beginner advanced tailored indMdual long-time modeler full size airplane flight instruc tor will make progress fun easy during week stay beautiful far western North Carolina Write call information RC Flight Training 1635 Setawig Rd Brasstown NC 28902 704-389-8968 SCALE CATALOGS SPPS 160 SUperaCale Constnjctiorl Plaits$500 SPPS 120060 Docunentalion PhotCa 3VS$500 ASP Model Airont Constnction Prst$500 ASP Scale AJro-stft Drmngs 3VS$500 Add $500 ES Air OVerseas 1/5 Sc WINNIE MAE 100 2 PC Wing Plans $3700 LOCKHEED VEGA Jim Pepinos SCALE PLANS & PHOTO SERVICE 3209 Madison Ave Greensboro NC 27403 VisalMCPHONE/FAX 910 292-5239
Edition: Model Aviation - 1997/09
Page Numbers: 99, 100, 102, 104
RADIO CONTROL ELECTRICS months topics include meet announcement some new products 97 SR Seminar program overlooked speed control problem some interesting reader input Eleventh Annual DEAF Fly-In will held October 4-5 Dallas TX RC Club Field Seagoville meet offers some AMA events 610 612 618 plus some fun-fly pursuits including lightest RC Electric fly 10 minutes seven-cell lifting maybe AULD Up Last Down info contact contest director Greg Judy 817 468-0962 75267224tompuservecom can also contact Frank Korman 214 327-8411 FmanKorman0cccdedu Dallas Electric Aircraft fliers website http/web2airmailnetlwarnerl/deaf/ Tom Hunt head modeler Modelair-Tech Box 1467 Lake Grove NY 11755-0898 Tel/Fax 516 981-0372 E-mail thunt95147@aolcom has released info new H-l00 belt drive designed especially Speed 400-class motors Example motors include Graupner Speed 400 Kyosho AP-29 drive sturdy assembly having i/is output shaft dual ball bearings number ratios ranging 257 48 available Price $3995 less prop adapter shipping Azarr fun-fly fame sent some samples control horns designed Speed 400-class designs magnificently die-cut apparently laser 46 plywood intended glued place Pricing $250 six including postage Speed 400 Specialities 1750 Lundgren Rd New Carlisle OH 45344 Tel 937 849-0418 Gene Norman 166 Panhandle Cr Maysville GA 30558 does have product sell does offer freebie full-size two-view drawing Graupner Speed 400/belt drive assembly intended plan-overlay assist planning own motor installation Gene will happily send anyone sends SASE Larry Sribnick SR Batteries has announced plans annual SR Seminar held Friday KRC Electric fly weekend September 19-2 1 Allentown PA Hilton Scheduled presentations include Getting Most out Batteries Lany Larger Gas Conversions Steve Anthony History AstroFlight Electric Flight Bob Boucher Multimotor Power System Installations Keith Shaw Running Speed 400 Pylon Event Bill Griggs Nonlinear Speed Controls Bob Kopski Larry also hosting Friday evening bring brag anyone can bring favorite show-and-tell present Everyone gets chance speak will awards technical achievement years affair will occupy two joined ballroomslots mom previously available Hilton located Allentown about ten minutes fmm Queen City Airport KRC site Seminar has filled recent years suggest contact Larry SR Batteries Inc Box 287 Beilport NY 11713 Tel [516] 286-0079 reservations Electronic Speed Control discussion could fill book itself theres always September 1997 99 Sam Devonshire Warminster PA Miss Philadelphia OldTimer Geared Astro 05 eight 17s 80 ounces Novice modeler Ward Brown Quakertown PA won Astro Porterfield kit KRC Electric Fly Raffle EZFLY another KRC Raffle model Has 600 square inches Master Airscrew system six 17s Excellent beginners Out-of-this-world original Don Fox Mars PA Short successful flight radio problems metalized covering Carbon Loins Sept 31 1997 10 ntr9syerpaca9e 48 entFxs Width 025 0375 05 10 RepSaie $1850$1390 $2000$1500 $2500$1875 $4000$3000 $2500$1875 $2750$2065 $3500$2625 $6000$4500 n Save up 25% popu Car sizes Ortfer Now Sate TnXs Thickness _________ 0 007 0 007 0014025 00140375 001405 0014-10 U Orders under $50 add $5 handling except CST Savers Club Members VISA Mastercard Discover American Express accepted Shipping $3 Priority Mail additional Calif residents add 725% sales tax Order Toll Free 1-800-338-1278 E-mail cst@tniinetcom Web Site httpIiwwwcstsaIeScom Composite Structures Technology P 0 Box 642 Dept JP Tehachapi CA g3581-0642 information forthcoming Some needed cofittiluing influx new Electric modelers some driven continuing arrival new products now theres something has covered recently received letter Neil Whitman frustrated adjustment problem two-screw analog ESC wrote to several manufacturers Over years Ive familiar quandary described guess always took granted everyone knew about Its hard beheve lack realization never covered matter past columns worse dont recall reading about anywhere two-screw analog electronic speed control classic ESC approach going back almost two decades has two adjustments variously named different manufacturers intended penmt adjusting control operation fit transmitter throttle signal characteristics principle two adjustments intended permit setting both limit points low high ends stick effectivitywhere [on stick position] motor begins turn reaches full power sounds good adjustment procedure can real test patience because typically two Only Th@ 3 US Hobby Full Line Model Airplanes Helicopters Boats Cars II JAGUAR 40 ARF Wing Span 48 Length 40 Weight 48 lbs 5 7 lbs Item#855B PIPER CUB J-3/ARF 40 Y5LOW/ ALL WOOD CONAT 5M Wing Span 67 Length 43ii59B Weight 79 lbs ltemv8S7 ur DEALERS AND DISTRIBUTORS INQUIRIES WELCOME flRDERLRDLY 1-800249-0544 INFOHEIATION 1-201460-0544 OUR FAX LINE 1-2014604770 WE ACCEPT VISA hASTEN CARD & DISCOVER CARDS PRICES SUEJECT TO CHANGE WITHOUT NOTICE STORE HOURS MONDAY THRU THURSDAY 1OAM TO 7PM FRIDAY 19 AM TO 9PM SATURDAYS 10 AM TO 4PM PACKAGING AND SHIPPING FEE S5 50 NEW JERSEY RESIDENTS ADD 6% SALES TAX US HOBBY INC 200 MOONACHIE AVE MOONACHIE NJ 07074 SKY BABY-S/ ARF 25-35 2C TRAINER SM-I Wing Span 515 Length 36 Weight 33 lbs ltems852 US HOBBY INC 100 Model Aviation xperimental bumpy section RevoltI-sized wing Very simple construction Author cant tell difference conventional construction air II JAGUAR 4OIARF 40 51 SPORTS ALL TRIM PAINTED NO DECALS Wing Span 48 Length 40 Weight 48 lbs -57 lbs Itemv865A r PIPER CUB J-3/ARC 25-35 ALL WOOD CONST sM-i Wing Span 54 Length 3S7AUS Weight 3 5lbs ltemvB57N SIY BABYL/ARF 25- 35 2C TRAINER Wing Span 51 5 Length 36 Weight 3 3 lbs ltemvOS4 FIRE FLY ARF 10-15 2C GLOW INTHE DARK AFTER SUNSET sM Wing Span 40 Length 347 $51 9 Weigh 22 Ibs- 24 lbs Item #940 SSt9W Longer flight times. .are just phone call away Just because radio system came SOOmab battery pack doesnt mean have fly 500mah pack Todays transmitters servos draw current ever before However radio systems still come SOOmah 600mah battery packs Although electronics todays transmitters have changed dramatically battery packs come havent changed much last 15 years As have always said best radio gear. no better its battery pack SR 850 Series transmitter packs same size weight standard SOQmah pack will give full 900mah capacity means youll get almost twice flying time SR 850 Series transmitter pack did pack came transmitter theyll fit Airtronics Futaba JR transmitter ever made comes receiver packs can give pack SOQmah lOOmah 1 400mah thats slightly larger heavier original 500mah pack need 500mah pack 500 Series pack almost half size ordinary SOOmah pack yet has capacity S75mahl youd like information have question drop us note SR Batteries Inc Box 287 Bellport NY 11713 Fax 516-286-0901 Email 74167751@compuservecom call 516-286-0079 between 9am 5pm EST adjustments interact example set screw low-throttle position second high end youre likely find first setting has changed readjust first second adjustment will off somewhat screws interactivea back-and-forth trip ever convergence always possible some understanding patience Analog speed-control designs can broken two basic circuit approaches circuit technique measures width incoming signal pulse receiverjust like servo ESC electronics use information adjust voltage applied motornot unlike servo uses same info set output horn position output response motor speed servo position governed transmitted pulse width governed stick position signal pulse repeated signal sent again again frame rate transmitter Typical frame rates fixed somewhere over range 40-50 Hertz commanding signal repeated refreshed 40-50 times second depending equipment manufacturer Thus ESC servo continually gets lots lots command information form stick-controlled pulse width PCM transmitters operate somewhat differently Typical values pulse-width variation stick trim throw about two milliseconds some small differences among manufacturers time between pulses dictated frame rate typically ranges 25-20 milliseconds frame rates 40-50 Hz respectively actual information-carrying time period pulse width present small fraction total elapsed time Think signal pulse constantly repeating short blip time other speed-control circuit technique Some manufacturers use circuit approach uses both off periods transmitted signal pulse produce averaged signal used ESC ultimately control motor voltage separate complex story its own Both transmitted pulse width time between pulses frame rate combine form signal information used ESC pulse width considered primary source information relating stick position fixed frame rate also player ESC response Ordinarily no problem would aware detail would simply adjust ESC screws proper operation particular transmitter go fly However confusion frustration can easily happen may later install same ESC different radio system may set up ESC beforehand servo dnver other signal sources have different frame rates ESC control range will also varyno matter similarity transmitted pulse width may give appearance ESC adjustment has changed fact has what happened Neiland several times until caught nothing wrong design approach respected products have used including Astro Aveox Steve Neu now realize should have covered topic past heres hoping will find information useful now Life full should haves hindsight should have covered matter onceand should other authors Shame us collectively thanks Neil illuminating dark information void April 97 column discussed throttle emphasis idea now basis some new products portion 97 SR Seminar reader interest building own ESCs Two readers have indicated interest presenting ESC construction articles have encouraged both regard Readers coming two directions some like design use own speed controls others simply want build own published information two reader inputsboth analog designsone described unusual clever circuit component/technique knowledge first design uses signal pulse width information described two-screw design little iionLrOlIer Aveox Inc 31324 Via Golinas #103 Westlake Village CA 9162 Phone 8185978915 ax818 5970617 httpllwwwaveoxcom info@aveoxcom 102 Model Aviation ormance Brushless DC Motors addihon line high performance Brushless motors Aveoo now oftenog full line kds have machined tat parts made USA Aveos has tomplete line diroct drive goarod motors competitor sport flyer starting law us$200 motar/canfroller system Call Catalog new 20 oz 12 MOSFET Hi Pert ormance Hvhridrivo Microprocessor hued controller Availahlv special Introductory Price ot $15995 Far very limited timol 6-16 cola 604810 Optocouplng lofty nrogmmmablel _ENGINEERING 6917W 59th street chicago Illinois 60638 Phone 312 586-8503 Fax 312 586-8556 ElevonMixer ELECTRONIC MIXER elevoos v-tails flaps spoilers Ultra-simple setup installation Rugged microprocessorbased design 100% electronic high reli ability Simply consents between servos receiver Features semo reversing aod tour different mising rates allow tailor miser seeds ot model Will overdrive names options selected simple dip swdch Made USA aed designed work popular radio systemsAM PM aed PCM Very low power consumplion Size 16 o 0R o 04 Weight 02Ssz Less radio ounnectore Part No OA 53095 less conneotere 53885 complete AccessorySwitch GlowDriver ON-BOARD GLOW DRIVER makes starting easier sefer Keeps glow plug hot lust engine needs Micreproc essor-baned design simply connects between throttle semo receiver Reversi ble user-selectable en ott points Can easily drive two-cylinder twin-engine medals Unit automatically turns ott transmitter ott 100% electronic Made USA designed work popular radio systems Very small size 17 o 12 o 04 Weight Sdoz Low power consumption Comes battery/plug wire less connectors cell plug clip Pert Na OA $3495 ThrottleSwitch THROT small meds set need tally propor tinsel opeed control required ability tam motor er op atitude tsr The Tl gent microprocesnor-b jatores ch edicator light aid siren bagery low auto-timer nor motor ran duration ot 15 ecoroht Safety teaturan prc unit trom turning woen arming switch pressed Made tha USA designed worh popatar radio systems Small size 21 o 09 5 05 Weight S7hez 6-7 cells 30 amps continseus Less csenectors Pert Na TSO1OA $4095 PO 6ox3129 CoepsuCaniss TX78463-3129Seadlcr OOoERs& lNro 512 81d-6843lOaM7Pu DAILY CT FREE add $4511 S&H per order TX res add 775% tan Cusnuace Scostor FAX & APrre Noons 512 814-5843Cetalcit w interaction did include emphasis shaped response transfer function second reader went far send complete circuit design details ESC also uses unique two-screw~ circuit approach includes shaped transfer curve motivated April column design also uses transmitted pulse width input information case Id view twoscrew behavior about normalhaving usual interactivity above going continuing play own ESC version includes transfer shaping noninteractive two-screw adjustment behavior ESC approach reacts average pulse width frame period signal Admittedly two designs above simpler smaller what Im pursuing Its amazing transfer-shaping technique reader conceptually identical no prior communication matter Stay tuned Wayne Westra Allen Park Michigan wrote reaction January 97 column discussion about condition charger source batteries what happens run down Wayne tells product called Battery Buddyan automatic cutoff device used conjunction auto battery disconnect load battery reaches predetermined low voltage battery accessories can found automotive stores Sounds like way assure getting home field after busy day E flying enjoyment Thanks Wayne Charlie Sylvia has announced retirement planned closing CS Flight Systems Charlie has favorite Electric supplier regular KRC Electric Fly attendee years now heading south best Charlie Connie Maybe Connie will finally get fly blue Skyvolt 1/90 MA cover won KRC Raffle So concludes August column Please continue joyful rewarding pursuit Electric flight please include SASE correspondence youd like reply Model Aviation elize Its Awesome Up 50% Same Easy Starting No Glow Plugs Runs llvice Long Scale Sound P0 Box 141 Dep* MA Milford CT 06460 203-87 complete information packet send $400 credit apphed first order avadable planes cern awo seam Icarter wrde detado Long-EZ Looking Something unique 0 canard pusher may look otrange dont worty flies just like conventional airplane Wont otalll strakes tibergiouo canopy cowl wheel posts Foam core wings canard IncludeS moot hardware $185 pan 40 engineslinviudes uninpino oonnnnnra v01 Kerr Aircraft P0 Box 2554 Newport RI 02840 401 -847-7510 E-mail ksrrai19@nficom RC Flight Training Beginner advanced tailored indMdual long-time modeler full size airplane flight instruc tor will make progress fun easy during week stay beautiful far western North Carolina Write call information RC Flight Training 1635 Setawig Rd Brasstown NC 28902 704-389-8968 SCALE CATALOGS SPPS 160 SUperaCale Constnjctiorl Plaits$500 SPPS 120060 Docunentalion PhotCa 3VS$500 ASP Model Airont Constnction Prst$500 ASP Scale AJro-stft Drmngs 3VS$500 Add $500 ES Air OVerseas 1/5 Sc WINNIE MAE 100 2 PC Wing Plans $3700 LOCKHEED VEGA Jim Pepinos SCALE PLANS & PHOTO SERVICE 3209 Madison Ave Greensboro NC 27403 VisalMCPHONE/FAX 910 292-5239
Edition: Model Aviation - 1997/09
Page Numbers: 99, 100, 102, 104
RADIO CONTROL ELECTRICS months topics include meet announcement some new products 97 SR Seminar program overlooked speed control problem some interesting reader input Eleventh Annual DEAF Fly-In will held October 4-5 Dallas TX RC Club Field Seagoville meet offers some AMA events 610 612 618 plus some fun-fly pursuits including lightest RC Electric fly 10 minutes seven-cell lifting maybe AULD Up Last Down info contact contest director Greg Judy 817 468-0962 75267224tompuservecom can also contact Frank Korman 214 327-8411 FmanKorman0cccdedu Dallas Electric Aircraft fliers website http/web2airmailnetlwarnerl/deaf/ Tom Hunt head modeler Modelair-Tech Box 1467 Lake Grove NY 11755-0898 Tel/Fax 516 981-0372 E-mail thunt95147@aolcom has released info new H-l00 belt drive designed especially Speed 400-class motors Example motors include Graupner Speed 400 Kyosho AP-29 drive sturdy assembly having i/is output shaft dual ball bearings number ratios ranging 257 48 available Price $3995 less prop adapter shipping Azarr fun-fly fame sent some samples control horns designed Speed 400-class designs magnificently die-cut apparently laser 46 plywood intended glued place Pricing $250 six including postage Speed 400 Specialities 1750 Lundgren Rd New Carlisle OH 45344 Tel 937 849-0418 Gene Norman 166 Panhandle Cr Maysville GA 30558 does have product sell does offer freebie full-size two-view drawing Graupner Speed 400/belt drive assembly intended plan-overlay assist planning own motor installation Gene will happily send anyone sends SASE Larry Sribnick SR Batteries has announced plans annual SR Seminar held Friday KRC Electric fly weekend September 19-2 1 Allentown PA Hilton Scheduled presentations include Getting Most out Batteries Lany Larger Gas Conversions Steve Anthony History AstroFlight Electric Flight Bob Boucher Multimotor Power System Installations Keith Shaw Running Speed 400 Pylon Event Bill Griggs Nonlinear Speed Controls Bob Kopski Larry also hosting Friday evening bring brag anyone can bring favorite show-and-tell present Everyone gets chance speak will awards technical achievement years affair will occupy two joined ballroomslots mom previously available Hilton located Allentown about ten minutes fmm Queen City Airport KRC site Seminar has filled recent years suggest contact Larry SR Batteries Inc Box 287 Beilport NY 11713 Tel [516] 286-0079 reservations Electronic Speed Control discussion could fill book itself theres always September 1997 99 Sam Devonshire Warminster PA Miss Philadelphia OldTimer Geared Astro 05 eight 17s 80 ounces Novice modeler Ward Brown Quakertown PA won Astro Porterfield kit KRC Electric Fly Raffle EZFLY another KRC Raffle model Has 600 square inches Master Airscrew system six 17s Excellent beginners Out-of-this-world original Don Fox Mars PA Short successful flight radio problems metalized covering Carbon Loins Sept 31 1997 10 ntr9syerpaca9e 48 entFxs Width 025 0375 05 10 RepSaie $1850$1390 $2000$1500 $2500$1875 $4000$3000 $2500$1875 $2750$2065 $3500$2625 $6000$4500 n Save up 25% popu Car sizes Ortfer Now Sate TnXs Thickness _________ 0 007 0 007 0014025 00140375 001405 0014-10 U Orders under $50 add $5 handling except CST Savers Club Members VISA Mastercard Discover American Express accepted Shipping $3 Priority Mail additional Calif residents add 725% sales tax Order Toll Free 1-800-338-1278 E-mail cst@tniinetcom Web Site httpIiwwwcstsaIeScom Composite Structures Technology P 0 Box 642 Dept JP Tehachapi CA g3581-0642 information forthcoming Some needed cofittiluing influx new Electric modelers some driven continuing arrival new products now theres something has covered recently received letter Neil Whitman frustrated adjustment problem two-screw analog ESC wrote to several manufacturers Over years Ive familiar quandary described guess always took granted everyone knew about Its hard beheve lack realization never covered matter past columns worse dont recall reading about anywhere two-screw analog electronic speed control classic ESC approach going back almost two decades has two adjustments variously named different manufacturers intended penmt adjusting control operation fit transmitter throttle signal characteristics principle two adjustments intended permit setting both limit points low high ends stick effectivitywhere [on stick position] motor begins turn reaches full power sounds good adjustment procedure can real test patience because typically two Only Th@ 3 US Hobby Full Line Model Airplanes Helicopters Boats Cars II JAGUAR 40 ARF Wing Span 48 Length 40 Weight 48 lbs 5 7 lbs Item#855B PIPER CUB J-3/ARF 40 Y5LOW/ ALL WOOD CONAT 5M Wing Span 67 Length 43ii59B Weight 79 lbs ltemv8S7 ur DEALERS AND DISTRIBUTORS INQUIRIES WELCOME flRDERLRDLY 1-800249-0544 INFOHEIATION 1-201460-0544 OUR FAX LINE 1-2014604770 WE ACCEPT VISA hASTEN CARD & DISCOVER CARDS PRICES SUEJECT TO CHANGE WITHOUT NOTICE STORE HOURS MONDAY THRU THURSDAY 1OAM TO 7PM FRIDAY 19 AM TO 9PM SATURDAYS 10 AM TO 4PM PACKAGING AND SHIPPING FEE S5 50 NEW JERSEY RESIDENTS ADD 6% SALES TAX US HOBBY INC 200 MOONACHIE AVE MOONACHIE NJ 07074 SKY BABY-S/ ARF 25-35 2C TRAINER SM-I Wing Span 515 Length 36 Weight 33 lbs ltems852 US HOBBY INC 100 Model Aviation xperimental bumpy section RevoltI-sized wing Very simple construction Author cant tell difference conventional construction air II JAGUAR 4OIARF 40 51 SPORTS ALL TRIM PAINTED NO DECALS Wing Span 48 Length 40 Weight 48 lbs -57 lbs Itemv865A r PIPER CUB J-3/ARC 25-35 ALL WOOD CONST sM-i Wing Span 54 Length 3S7AUS Weight 3 5lbs ltemvB57N SIY BABYL/ARF 25- 35 2C TRAINER Wing Span 51 5 Length 36 Weight 3 3 lbs ltemvOS4 FIRE FLY ARF 10-15 2C GLOW INTHE DARK AFTER SUNSET sM Wing Span 40 Length 347 $51 9 Weigh 22 Ibs- 24 lbs Item #940 SSt9W Longer flight times. .are just phone call away Just because radio system came SOOmab battery pack doesnt mean have fly 500mah pack Todays transmitters servos draw current ever before However radio systems still come SOOmah 600mah battery packs Although electronics todays transmitters have changed dramatically battery packs come havent changed much last 15 years As have always said best radio gear. no better its battery pack SR 850 Series transmitter packs same size weight standard SOQmah pack will give full 900mah capacity means youll get almost twice flying time SR 850 Series transmitter pack did pack came transmitter theyll fit Airtronics Futaba JR transmitter ever made comes receiver packs can give pack SOQmah lOOmah 1 400mah thats slightly larger heavier original 500mah pack need 500mah pack 500 Series pack almost half size ordinary SOOmah pack yet has capacity S75mahl youd like information have question drop us note SR Batteries Inc Box 287 Bellport NY 11713 Fax 516-286-0901 Email 74167751@compuservecom call 516-286-0079 between 9am 5pm EST adjustments interact example set screw low-throttle position second high end youre likely find first setting has changed readjust first second adjustment will off somewhat screws interactivea back-and-forth trip ever convergence always possible some understanding patience Analog speed-control designs can broken two basic circuit approaches circuit technique measures width incoming signal pulse receiverjust like servo ESC electronics use information adjust voltage applied motornot unlike servo uses same info set output horn position output response motor speed servo position governed transmitted pulse width governed stick position signal pulse repeated signal sent again again frame rate transmitter Typical frame rates fixed somewhere over range 40-50 Hertz commanding signal repeated refreshed 40-50 times second depending equipment manufacturer Thus ESC servo continually gets lots lots command information form stick-controlled pulse width PCM transmitters operate somewhat differently Typical values pulse-width variation stick trim throw about two milliseconds some small differences among manufacturers time between pulses dictated frame rate typically ranges 25-20 milliseconds frame rates 40-50 Hz respectively actual information-carrying time period pulse width present small fraction total elapsed time Think signal pulse constantly repeating short blip time other speed-control circuit technique Some manufacturers use circuit approach uses both off periods transmitted signal pulse produce averaged signal used ESC ultimately control motor voltage separate complex story its own Both transmitted pulse width time between pulses frame rate combine form signal information used ESC pulse width considered primary source information relating stick position fixed frame rate also player ESC response Ordinarily no problem would aware detail would simply adjust ESC screws proper operation particular transmitter go fly However confusion frustration can easily happen may later install same ESC different radio system may set up ESC beforehand servo dnver other signal sources have different frame rates ESC control range will also varyno matter similarity transmitted pulse width may give appearance ESC adjustment has changed fact has what happened Neiland several times until caught nothing wrong design approach respected products have used including Astro Aveox Steve Neu now realize should have covered topic past heres hoping will find information useful now Life full should haves hindsight should have covered matter onceand should other authors Shame us collectively thanks Neil illuminating dark information void April 97 column discussed throttle emphasis idea now basis some new products portion 97 SR Seminar reader interest building own ESCs Two readers have indicated interest presenting ESC construction articles have encouraged both regard Readers coming two directions some like design use own speed controls others simply want build own published information two reader inputsboth analog designsone described unusual clever circuit component/technique knowledge first design uses signal pulse width information described two-screw design little iionLrOlIer Aveox Inc 31324 Via Golinas #103 Westlake Village CA 9162 Phone 8185978915 ax818 5970617 httpllwwwaveoxcom info@aveoxcom 102 Model Aviation ormance Brushless DC Motors addihon line high performance Brushless motors Aveoo now oftenog full line kds have machined tat parts made USA Aveos has tomplete line diroct drive goarod motors competitor sport flyer starting law us$200 motar/canfroller system Call Catalog new 20 oz 12 MOSFET Hi Pert ormance Hvhridrivo Microprocessor hued controller Availahlv special Introductory Price ot $15995 Far very limited timol 6-16 cola 604810 Optocouplng lofty nrogmmmablel _ENGINEERING 6917W 59th street chicago Illinois 60638 Phone 312 586-8503 Fax 312 586-8556 ElevonMixer ELECTRONIC MIXER elevoos v-tails flaps spoilers Ultra-simple setup installation Rugged microprocessorbased design 100% electronic high reli ability Simply consents between servos receiver Features semo reversing aod tour different mising rates allow tailor miser seeds ot model Will overdrive names options selected simple dip swdch Made USA aed designed work popular radio systemsAM PM aed PCM Very low power consumplion Size 16 o 0R o 04 Weight 02Ssz Less radio ounnectore Part No OA 53095 less conneotere 53885 complete AccessorySwitch GlowDriver ON-BOARD GLOW DRIVER makes starting easier sefer Keeps glow plug hot lust engine needs Micreproc essor-baned design simply connects between throttle semo receiver Reversi ble user-selectable en ott points Can easily drive two-cylinder twin-engine medals Unit automatically turns ott transmitter ott 100% electronic Made USA designed work popular radio systems Very small size 17 o 12 o 04 Weight Sdoz Low power consumption Comes battery/plug wire less connectors cell plug clip Pert Na OA $3495 ThrottleSwitch THROT small meds set need tally propor tinsel opeed control required ability tam motor er op atitude tsr The Tl gent microprocesnor-b jatores ch edicator light aid siren bagery low auto-timer nor motor ran duration ot 15 ecoroht Safety teaturan prc unit trom turning woen arming switch pressed Made tha USA designed worh popatar radio systems Small size 21 o 09 5 05 Weight S7hez 6-7 cells 30 amps continseus Less csenectors Pert Na TSO1OA $4095 PO 6ox3129 CoepsuCaniss TX78463-3129Seadlcr OOoERs& lNro 512 81d-6843lOaM7Pu DAILY CT FREE add $4511 S&H per order TX res add 775% tan Cusnuace Scostor FAX & APrre Noons 512 814-5843Cetalcit w interaction did include emphasis shaped response transfer function second reader went far send complete circuit design details ESC also uses unique two-screw~ circuit approach includes shaped transfer curve motivated April column design also uses transmitted pulse width input information case Id view twoscrew behavior about normalhaving usual interactivity above going continuing play own ESC version includes transfer shaping noninteractive two-screw adjustment behavior ESC approach reacts average pulse width frame period signal Admittedly two designs above simpler smaller what Im pursuing Its amazing transfer-shaping technique reader conceptually identical no prior communication matter Stay tuned Wayne Westra Allen Park Michigan wrote reaction January 97 column discussion about condition charger source batteries what happens run down Wayne tells product called Battery Buddyan automatic cutoff device used conjunction auto battery disconnect load battery reaches predetermined low voltage battery accessories can found automotive stores Sounds like way assure getting home field after busy day E flying enjoyment Thanks Wayne Charlie Sylvia has announced retirement planned closing CS Flight Systems Charlie has favorite Electric supplier regular KRC Electric Fly attendee years now heading south best Charlie Connie Maybe Connie will finally get fly blue Skyvolt 1/90 MA cover won KRC Raffle So concludes August column Please continue joyful rewarding pursuit Electric flight please include SASE correspondence youd like reply Model Aviation elize Its Awesome Up 50% Same Easy Starting No Glow Plugs Runs llvice Long Scale Sound P0 Box 141 Dep* MA Milford CT 06460 203-87 complete information packet send $400 credit apphed first order avadable planes cern awo seam Icarter wrde detado Long-EZ Looking Something unique 0 canard pusher may look otrange dont worty flies just like conventional airplane Wont otalll strakes tibergiouo canopy cowl wheel posts Foam core wings canard IncludeS moot hardware $185 pan 40 engineslinviudes uninpino oonnnnnra v01 Kerr Aircraft P0 Box 2554 Newport RI 02840 401 -847-7510 E-mail ksrrai19@nficom RC Flight Training Beginner advanced tailored indMdual long-time modeler full size airplane flight instruc tor will make progress fun easy during week stay beautiful far western North Carolina Write call information RC Flight Training 1635 Setawig Rd Brasstown NC 28902 704-389-8968 SCALE CATALOGS SPPS 160 SUperaCale Constnjctiorl Plaits$500 SPPS 120060 Docunentalion PhotCa 3VS$500 ASP Model Airont Constnction Prst$500 ASP Scale AJro-stft Drmngs 3VS$500 Add $500 ES Air OVerseas 1/5 Sc WINNIE MAE 100 2 PC Wing Plans $3700 LOCKHEED VEGA Jim Pepinos SCALE PLANS & PHOTO SERVICE 3209 Madison Ave Greensboro NC 27403 VisalMCPHONE/FAX 910 292-5239
