Radio Control: Electrics

RADIO CONTROL ELECTRICS THIS MONTHS TOPICS include meet announcement new catalog some new Electrics follow-up last months motor power discussion noisy Electrics Futaba Chuck Hill wrote tell Electric Fun-Fly scheduled Sunday October 20 BARCS field Richmond CA near San Francisco Oakland meet jointly sponsored Concord Model Engineers Bay Area Radio Control Society can contact Chuck details 1382 Deerfield Ct Concord CA 94521 Tel 510 685-1546 Bob Kress Kress Jets 800 Ulster Landing Rd Saugerties NY 12477 Tel [914] 3368 149 sent latest copy current catalog has wide variety Electric goodies ducted-fan enthusiast $3 catalog lists several Electric ducted fan assemblies motors airplanes design software Bob also sent drafts articles hes developing related topics Electric ducted flying very viable form E-njoyment year KRC meet brings out several new ducted designs Readers often ask Electric ARF Almost Ready Fly model suggestions avoid building chore generally discourage ARF approach because Ive seen over years would tend discourage Electric pursuit rather help course Ive seen such products may some exceptions cant buy try everything other hand Electric kits such Goldberg Mirage Electra Great Planes PT Electric others always fly acceptably well now some middle ground report Several weeks ago attended Lehigh Valley RC Society E-meet saw old friends Bill Mickey Bowne Bill just getting started supplying beginner-level ready-built Electrics area photos shows Bills Good 01 Dog designnamed remembrance favorite family pet Good 01 Dog designed use geared OSs six eight cells uses classic Clark Y section has spacious fuselage easily holds regular size receivers servos As supplied empty covered craft weighs 16-17 ounces including pushrods Optional color schemes include red yellow blue yellow Bill selling $100 pickup means writing Bill set up ship finished models looking Chances hurdle will crossed time read can inquire 307 Colorado Tr Browns Mills NJ 08015 Tel 609 893-1095 Bill Griggs 206 State St Canastota NY 13032 Tel [315] 697-8152 has designing Speed 400-sized Pylon models few years showing off two versions latest Rocket design LVRCS meet model shown incorporates six-volt version Speed 400 motor running seven Sanyo KR600AE cells turning 5 x 5 prop Power management Lofty Pursuits mini speed control BEC up 151/2 ounces including Hi Teck 535 receiver two S133 servos Kits semikits should available Bill time read thing sure Graupner Speed 400-series motors becoming very popular among E modelersin part because can have lot E-fun very little equipment cost airplanes small cheap too October column included discussion motor voltage current power related matters Aletter received after October column submitted illustrated several forms user confusion about topic inquiry asked Electric recommendation would fly full power five minutes half power five minutes request actually raises questions just apparent First off what full power Its push stick full right what does really mean Assuming properly adjusted speed control full up throttle stick should mean ESC full onie motor receiving voltage can discussed last month current demand motor highly dependent prop size Since motor input power product motor voltage current its clear changing prop changes power input hence meaning full power Most Electrics fly nicely 50 watts motor input power per pound some fly OK less certainly fly spirited Its clear long charge lasts flight time depends heavily own particular version full power thus half power November1996 93 Good 01 Dog Bill Bowne ready-built geared 05s six Author witnessed first flight -scale Clipped-wing Taylorcraft eight cells Text has address ordering info Mike Stewart Geared 9036 17s 165 pounds Bill Griggs Speed 400-powered T-tail Rocket pylon model Graupner motors becoming very popular inadvertently presented sort-of-relevant example September column discussion E-Motion Flight Profile histogram depicted honest average flight time 15 minutes kinds weather full use throttle over available power range also described flight purposely flown full throttle low horizontal eights lasted just past five minutes airplane its particular setup its capability just about five minutes full power nothing Yet lower average power flights last three times long times Ive witnessed pilot describe flight hes having being half power smilingly points throttle stick positioned about mid-throw quite common associate half stick half power guess hardly ever case actual practice Half stick can mean anything over wide range possible ESC conditions example depending startup full points particular ESC intermediate positions throttle stick can mean just about anything power-wise Add variable trim lever setting meaninglessness can creep would actually have measure half power occurs measure motor voltage current mark stick trim lever positions Chances stick will somewhere other mid-position reason picked half powerwhich itself holds no particular significanceis because example taken specific reader letter graphic depicts motor input power bench test setup can vary applied voltage particular system Such behavior typical almost power system As can see doubling voltage does necessarily double motor input power example note am pleased announce two newest planes Speedy Bee Lazy Bee Special now available Clancy Aviation Both new Bees have ailerons truly delight fly hands-ott stability super-low minimum flying speed & sprung landing gear make great tlying smooth landings oversize control surtaces high power-to-weight ratio make incredible aerobatics Knife-edge tlights steep side-slipping descents turns banking now possible Flying windy days breeze recent fly-in Bees won Most Flights award because just too windy other planes new aileron wing has polyhedral bottom straight across top novel wing design stable flying upright unlike conventional polyhedra wings unstable flying inverted Construction covering easy kits have pre-cut parts fall cleanly sheets stainless steel landing gear detailed plans covering templates kit includes address phone number new Lazy Bee Special original Lazy Bee new aileron wing Get complete kit convert old Lazy Bee new aileron wing kit Speedy Bee kit builds very quickly sheet balsa & plywood part pre-cuf fits pertectly Construction rugged & simple theres no laminating planes covered Easytex covering recommend because truly strongest easiest use covering available carry 22 colors give try also have float kits Trexier Balloon Wheels planes well Lifespan super-light heatshrink iron-on covering Andy Clancy Watch put new Lazy Bee Special & Speedy Bee through wringer Its new Speedy Bee video shipped catalog lost $lQl Send H latest catalogl catalog includes sample Easytex & Litespan covering Catalogs free purchase accept credit cards money orders personal checks cash AZ residents add 675 % tax New Mailing Address Clancy Aviation P0 Box 4125 Mesa AZ 85211-41 25 Tel 602-649-1534 Fax 602-649-9040 kate Speacy Oee Lazy Oee & aay nee Speca razemarks alP ancy Se atron 94 Model Aviation L ELECTRONICS PLUS TURBO 1060110 RATiO oNc TrNc ia X 712 200 150 0 lea 0 0 eu 0________________ 012340870910 MOTOR VOLTS BEE FIRST FLY CLANCY Matched 1700 SCRC md Cells$500 SANYO N1700 SCRC md Cells$450 SANYO N1400 SCR md Cells$300 SANYO NiOQO SCR md Cells$350 SANYO N800 AR md Cells$350 SANYO KR600 AE md Cells$250 SANYO N270 AA Ind Cells$250 SANYO 600 AA Rechargeable$150 SAFT Full C Rechargeable Batteries$100 Ea 4 Cell 270 AA Receiver Pk$1000 5 Cell 1000 AE Receiver Pk$1800 Connectors$300 PR \RSAND input power about 35 watts four volts about 200 watts eight volts Indeed motor input powerand part power delivered propchanges highly non-linearly applied voltage Since ESC normally varies motor voltage linearly transmitter stick position can think graph motor power versus relative stick position Thus motor power varies highly non-linearly stick position well back reader question Lets say really wanted demonstrate flying answer reader query old Electric rule thumb motor input power required just sustain flight simple Electrics approximately equal weight pounds times wing loading ozIsq ft Consider airplane like own REVOLT design MA November 94 600-square-inch flat-bottom cabinconfiguration airplane flies nicely wide variety power systems including geared Astro 25 14 cells system REVOLT might weigh about 80 ounces Lets say choose define own half power level minimum power level would make full power twice minimum value Id choose prop system full stick Id twice power needed just fly Now what flight time might expected minimum power above power required just fly airplane would watts ozIsq Ft 80/416 about 96 watts Lets round up 100 watts convenience current demand 14cell pack 100 watts watts/# cell x avg voltage per cell 14 x 11 mps Assuming 7Ah SCRC pack current drain would empty pack about 25 hours 15 minutes assuming 95% charge return pack good pack will return about 95% its charge during discharge motor should able hang airplane prop full 15 minutes using throttle control maintain minimum power level Having previously chosen prop Aveox Brushless DC Motors Aveso Brushless DC Motors have proven time again want power efficiency no other choice Pictured New Robhe Power Peak Infinity Charger Digital 1-30 cell 01 Se 50 Amp charger cycler other features $16905 1412/2Y motor sf57 cell 1400 mah pack "p prodaces 52 thrust Thia same motor winning mrs uarspe coupled 3t1 georhos 15a13 prop 27 cellsl motors provide wide range use no maintenance yon actually auve moneyl Call Special Introductroy Offer 31324 Via Colinas #104 Westlake Village CA 91362 818-597-8915 fax 818-597-0617 http/Iwwwaveoxcom 102252 401 @compuserve PROUDLY MADE IN USA 4-40x1/2 socket caps sell S435/1 00 ailoy steel S665/1 00 stainless S750/50 aluminum fair prices sensible quantities fas teners need model building call write fax free catalog Micro Fasteners800-892-6917 110 Hillcrest Road908-806-4050 Fleminglon NJ 08822fax 908-788-2607 e-mail micrel@blnst netInternet http//micrefnsfenerswm 96 Model Aviation WVS1WUkLFWEUIUEYIUAWiNiAUIiWiYhWWWi5iUAYb purpose going full throttle would invoke about 200 watts motor power input about 13 amps draw pack five minutes load would drain about 65 Ampere-minutes 108 Ampere-hours would leave about 0532 Ah pack now reduced power lust flying level above 65 Ampere demand would empty remaining pack charge about 532/65 494 minutes Remember chose defined half power lust flying power level So have just about five minutes flight full power five minutes flight half powerfor choice power levels Yes seems possible satisfy readers wish does really work believe does next column Ill attempt prove flight dataagain say again because rules thumb actually empiricisms based own in-air experiments 1 980s described MA Electrics series same era Meanwhile please note importance weight expression power needed just fly little less weight means lot example extent old rule thumb observation credible minimum power fly rule approximately quadratic function weightfor simple airplanes least Ive beard some noisy Electrics past now recently can believe oxymoron Amazing what time will forgotten about installation peculiarity can actually cause lot noise air ruin Electrics good quiet neighbor name several days ago got reminder friend brought newly completed Old-Timer field geared Astro 05 seven cells beautifully finished Micafilm noisy modeler felt something wrong gears talked about returning motor service took look mesh good lubed shaft OK prop seemed OK noisy dawned frame rate controller thingsespecially SS FEATHER CUT creates new standard ease accuracy cutting white blue foam wing cores ds off Precise single wire tracking concert micro-adjustable balance weights guided exclusive three-point tracking system guarantees ripple-free surfaces No trailing edge burn-out common two wire systems Couple FEATHER CUT Tekoas THERMAL GENERATOR fool proof temperature control youll Pro st time out Cuts straight taper wings fins stabilizers matically ts tape edge workbench dining table stores its own heavy duty mailing tube lete kit anodized plated components no hardware store trips ructions include cutting first wing making templates old Bow 40 52 Available Power supply required Guaranteed out perform rest Simply best TEKOA THE CENTER OF DESIGN 49380 SKYHARBOR WAY FEATHER CUT $14950 S & H SNITCH will aid trouble shooting glitch probleno microcontroller counts recordo glticheo reisoed nignal frames during flight playback later ground counting out audible tones Great tor trouble ohoot log noisy ignition system glitches try log oat different equipment configura tions Alon warns 01 interference frequency reminds torn ug receiner moot enety flight h moot naloable elec tronic accessodeo coma along recently Electronics corner Model Boilder September gb gize 1320 t 320 6d ht i6 ounce Price $3995 ULTIMATE BATTERY BACKER 6 CHANNEL GLITCH BUSTER OPTICALLY ISO LATE channels separate buttery pack servo power Totally eliminates glitching caused heany duty servos long leads giant ucule airplanes glidem can 4 5 cello tee servo side fur entra power speedl Requires installation own radio serno leads Compatible PCM radius Used Penn Racers NASA too 1S o 18 o 3/4 weight 8 ounce $4495 NEWI Now anarlable wired connectum 57995 Mini-Max Throttle BEST way insure reliableThn microprocessor power model Use withconSolleci sopor-small MINItwo battery packs two swdchMJX feaiorr kighraie no harnesses Runs MAIN packadjosimeni -setuo softtill drops Out switches to51011 BACK-UP packwan s standard 4 cell S cellstick position motoror GEL-CELL packs Batteryoff Foil safe enteosine packs can different capacity like 1200 big Solid stateglitch filter software design uses MOSFET trunsistomDesigned 1-16 cells 30 Used notensinely professionalamps 50 amps peak includes servo connector ano RPVs odd own owdob hareesses wiring 15 15 o 78 -SERMOS' cosnectom Measures lxi SoS ght 1 oz weight 8 ounce connectom 54998 NEWt Now enaileble wiredletroductory price $7995 connectors $5995 Electronic Medal Systems 22605 La Paima Ace Ste 519 Verbs Linda CA 92697 714692-1393 linfo Onlyl 908-9459979 larders Onipl $300 Shipping & Handling Per Order Credit Cards Accepted American Express Discover Mastercard & Visa SUJOOSH IEtm BAILS OUT Release scale-like Parachutistl real crowd pleaser af funl Brilliant colorsl Fl orange 1Fl pink yellaw red white blue galdl Complete Figure & release system $1895 ec plus $325 S/H Model Aviation Special Red White & Blue Red & Gold Combol $1895 325 5/Hl SEND ORDER TODAY TO HOBBY HUT MANUFACTURING 2020 W 21st St N Suite #77 WiChita KS 67203-2107 Dept MRV send SASE brochure S-n $3900 F~1 i C products 6924 E 92nd TulSo OK 74133 DEALERS WELCOME 918-492-9435 18-492-9375 nccrrono November1996 97 THERMAL GENERATOR Power Supply $11950 S & H SCREAMING OWE ATTACKS AUDIBLE FLIGHT MANEUVERS ,bO srOd O,igs iO4,iS n~ Odk,M GLOW PLUG ADAPTER FOR GLOW ENGINES SPARK PLUG ADAPTER FOR GAS ENGINES EXTRA VALVE CORES SPARE CAPS AND 0-RING Air Screamer TM Miter Cut Miter Cut allows craftsman make ac curate cuts both wood plastic Miter Cut uses standard single edge razor blades adjustable fence swings through arc precise degree marks positive stop 900 allows modeler make accurate repeatable cuts tight fits mitered corners Miter Cut excellent tool hobby requirements including * Model Airplane Ship parts 0 Model Railroad Train Layouts * Minatures Furniture Picture Frames Mitered joints rubber trims moldings such Fourmost Window Flange Canopy Trim FOURMOST PRODUCTS Look other great producte Fourmost nearest hobby dealor direct orders include $3 00 Shipping 4040 24th Avenue Forest Grove OR 71 16 B&P Associates Gives Total Flight Line FREEDOM new electrtc starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wtre get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop ___________________________________________ have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 combined gear drive large reverberation chamber like OT Micafilmcan actually growl intermediate motor speeds What actually happens gear teeth hammered together signal control rate frame rate speed control same signal frame rate transmitter usually 50 cycles per second Basically frame rate control turns motor off variable-duty cycle frame rate audible starting/stopping motor gears makes lot noise gear wear tear good gears ears Electrics quiet reputation virtually no excuse use frame rate speed controls speed controls Using on/off switches about good also some argument using Futaba Electric receiver builtin frame rate control offers beginner simplicity radios work great please dont tempted use frame rate ESCs otherwise Go high rate controls plenty market choose everything better theseincluding operational efficiency superiority midspeed Futaba Electric radio has out years otherwise great product design growing old feel its about time Futaba update popular product Id like see FM receiver built-in high-rate control will operate up 12-cell systems readily handle demanding motors range should offer soft brake option too Beyond product should come supplied popular Sermos connectors adequately heavy wire So ends both another column another column year no columns December issue because Nats coverage Frank Korman Dallas Electric Aircraft Fliers will provide coverage Electric Nats Please include SASE correspondence youd like reply dont forget Electrics fly just great Winter too 498 Model Aviation ision Cutting Tool Price $1995 Product No FOR 151 ISSMO Micro AV Competition International Society Structural Multi disciplinary Optimization ISSMO announcing Micro AV competition objective competition employ multi-disciplinary design optimization MOO design build smallest aerial vehicle AV can perform following mission Fly photograph 15-meter size symbol ground located 600 meters launch site hidden view square enclosing fence 35-meter wide 15-meter high Provide legible image symbol launching individual launch site will two prizes awarded AVs complying competition rules $1250 prize smallest AV other $1250 prize design best MOO no 15 times size AV winning first prize competition will held site near University Florida campus April 51997 copy competition rules write ISSMO President Professor Raphael Haftka Department AeMES University Florida Gainesville FL 32611-6250 email haftka@ufledu Additional information also available ISSMO home page http//wwwaeroufledulgetlissmohtm

RADIO CONTROL ELECTRICS THIS MONTHS TOPICS include meet announcement new catalog some new Electrics follow-up last months motor power discussion noisy Electrics Futaba Chuck Hill wrote tell Electric Fun-Fly scheduled Sunday October 20 BARCS field Richmond CA near San Francisco Oakland meet jointly sponsored Concord Model Engineers Bay Area Radio Control Society can contact Chuck details 1382 Deerfield Ct Concord CA 94521 Tel 510 685-1546 Bob Kress Kress Jets 800 Ulster Landing Rd Saugerties NY 12477 Tel [914] 3368 149 sent latest copy current catalog has wide variety Electric goodies ducted-fan enthusiast $3 catalog lists several Electric ducted fan assemblies motors airplanes design software Bob also sent drafts articles hes developing related topics Electric ducted flying very viable form E-njoyment year KRC meet brings out several new ducted designs Readers often ask Electric ARF Almost Ready Fly model suggestions avoid building chore generally discourage ARF approach because Ive seen over years would tend discourage Electric pursuit rather help course Ive seen such products may some exceptions cant buy try everything other hand Electric kits such Goldberg Mirage Electra Great Planes PT Electric others always fly acceptably well now some middle ground report Several weeks ago attended Lehigh Valley RC Society E-meet saw old friends Bill Mickey Bowne Bill just getting started supplying beginner-level ready-built Electrics area photos shows Bills Good 01 Dog designnamed remembrance favorite family pet Good 01 Dog designed use geared OSs six eight cells uses classic Clark Y section has spacious fuselage easily holds regular size receivers servos As supplied empty covered craft weighs 16-17 ounces including pushrods Optional color schemes include red yellow blue yellow Bill selling $100 pickup means writing Bill set up ship finished models looking Chances hurdle will crossed time read can inquire 307 Colorado Tr Browns Mills NJ 08015 Tel 609 893-1095 Bill Griggs 206 State St Canastota NY 13032 Tel [315] 697-8152 has designing Speed 400-sized Pylon models few years showing off two versions latest Rocket design LVRCS meet model shown incorporates six-volt version Speed 400 motor running seven Sanyo KR600AE cells turning 5 x 5 prop Power management Lofty Pursuits mini speed control BEC up 151/2 ounces including Hi Teck 535 receiver two S133 servos Kits semikits should available Bill time read thing sure Graupner Speed 400-series motors becoming very popular among E modelersin part because can have lot E-fun very little equipment cost airplanes small cheap too October column included discussion motor voltage current power related matters Aletter received after October column submitted illustrated several forms user confusion about topic inquiry asked Electric recommendation would fly full power five minutes half power five minutes request actually raises questions just apparent First off what full power Its push stick full right what does really mean Assuming properly adjusted speed control full up throttle stick should mean ESC full onie motor receiving voltage can discussed last month current demand motor highly dependent prop size Since motor input power product motor voltage current its clear changing prop changes power input hence meaning full power Most Electrics fly nicely 50 watts motor input power per pound some fly OK less certainly fly spirited Its clear long charge lasts flight time depends heavily own particular version full power thus half power November1996 93 Good 01 Dog Bill Bowne ready-built geared 05s six Author witnessed first flight -scale Clipped-wing Taylorcraft eight cells Text has address ordering info Mike Stewart Geared 9036 17s 165 pounds Bill Griggs Speed 400-powered T-tail Rocket pylon model Graupner motors becoming very popular inadvertently presented sort-of-relevant example September column discussion E-Motion Flight Profile histogram depicted honest average flight time 15 minutes kinds weather full use throttle over available power range also described flight purposely flown full throttle low horizontal eights lasted just past five minutes airplane its particular setup its capability just about five minutes full power nothing Yet lower average power flights last three times long times Ive witnessed pilot describe flight hes having being half power smilingly points throttle stick positioned about mid-throw quite common associate half stick half power guess hardly ever case actual practice Half stick can mean anything over wide range possible ESC conditions example depending startup full points particular ESC intermediate positions throttle stick can mean just about anything power-wise Add variable trim lever setting meaninglessness can creep would actually have measure half power occurs measure motor voltage current mark stick trim lever positions Chances stick will somewhere other mid-position reason picked half powerwhich itself holds no particular significanceis because example taken specific reader letter graphic depicts motor input power bench test setup can vary applied voltage particular system Such behavior typical almost power system As can see doubling voltage does necessarily double motor input power example note am pleased announce two newest planes Speedy Bee Lazy Bee Special now available Clancy Aviation Both new Bees have ailerons truly delight fly hands-ott stability super-low minimum flying speed & sprung landing gear make great tlying smooth landings oversize control surtaces high power-to-weight ratio make incredible aerobatics Knife-edge tlights steep side-slipping descents turns banking now possible Flying windy days breeze recent fly-in Bees won Most Flights award because just too windy other planes new aileron wing has polyhedral bottom straight across top novel wing design stable flying upright unlike conventional polyhedra wings unstable flying inverted Construction covering easy kits have pre-cut parts fall cleanly sheets stainless steel landing gear detailed plans covering templates kit includes address phone number new Lazy Bee Special original Lazy Bee new aileron wing Get complete kit convert old Lazy Bee new aileron wing kit Speedy Bee kit builds very quickly sheet balsa & plywood part pre-cuf fits pertectly Construction rugged & simple theres no laminating planes covered Easytex covering recommend because truly strongest easiest use covering available carry 22 colors give try also have float kits Trexier Balloon Wheels planes well Lifespan super-light heatshrink iron-on covering Andy Clancy Watch put new Lazy Bee Special & Speedy Bee through wringer Its new Speedy Bee video shipped catalog lost $lQl Send H latest catalogl catalog includes sample Easytex & Litespan covering Catalogs free purchase accept credit cards money orders personal checks cash AZ residents add 675 % tax New Mailing Address Clancy Aviation P0 Box 4125 Mesa AZ 85211-41 25 Tel 602-649-1534 Fax 602-649-9040 kate Speacy Oee Lazy Oee & aay nee Speca razemarks alP ancy Se atron 94 Model Aviation L ELECTRONICS PLUS TURBO 1060110 RATiO oNc TrNc ia X 712 200 150 0 lea 0 0 eu 0________________ 012340870910 MOTOR VOLTS BEE FIRST FLY CLANCY Matched 1700 SCRC md Cells$500 SANYO N1700 SCRC md Cells$450 SANYO N1400 SCR md Cells$300 SANYO NiOQO SCR md Cells$350 SANYO N800 AR md Cells$350 SANYO KR600 AE md Cells$250 SANYO N270 AA Ind Cells$250 SANYO 600 AA Rechargeable$150 SAFT Full C Rechargeable Batteries$100 Ea 4 Cell 270 AA Receiver Pk$1000 5 Cell 1000 AE Receiver Pk$1800 Connectors$300 PR \RSAND input power about 35 watts four volts about 200 watts eight volts Indeed motor input powerand part power delivered propchanges highly non-linearly applied voltage Since ESC normally varies motor voltage linearly transmitter stick position can think graph motor power versus relative stick position Thus motor power varies highly non-linearly stick position well back reader question Lets say really wanted demonstrate flying answer reader query old Electric rule thumb motor input power required just sustain flight simple Electrics approximately equal weight pounds times wing loading ozIsq ft Consider airplane like own REVOLT design MA November 94 600-square-inch flat-bottom cabinconfiguration airplane flies nicely wide variety power systems including geared Astro 25 14 cells system REVOLT might weigh about 80 ounces Lets say choose define own half power level minimum power level would make full power twice minimum value Id choose prop system full stick Id twice power needed just fly Now what flight time might expected minimum power above power required just fly airplane would watts ozIsq Ft 80/416 about 96 watts Lets round up 100 watts convenience current demand 14cell pack 100 watts watts/# cell x avg voltage per cell 14 x 11 mps Assuming 7Ah SCRC pack current drain would empty pack about 25 hours 15 minutes assuming 95% charge return pack good pack will return about 95% its charge during discharge motor should able hang airplane prop full 15 minutes using throttle control maintain minimum power level Having previously chosen prop Aveox Brushless DC Motors Aveso Brushless DC Motors have proven time again want power efficiency no other choice Pictured New Robhe Power Peak Infinity Charger Digital 1-30 cell 01 Se 50 Amp charger cycler other features $16905 1412/2Y motor sf57 cell 1400 mah pack "p prodaces 52 thrust Thia same motor winning mrs uarspe coupled 3t1 georhos 15a13 prop 27 cellsl motors provide wide range use no maintenance yon actually auve moneyl Call Special Introductroy Offer 31324 Via Colinas #104 Westlake Village CA 91362 818-597-8915 fax 818-597-0617 http/Iwwwaveoxcom 102252 401 @compuserve PROUDLY MADE IN USA 4-40x1/2 socket caps sell S435/1 00 ailoy steel S665/1 00 stainless S750/50 aluminum fair prices sensible quantities fas teners need model building call write fax free catalog Micro Fasteners800-892-6917 110 Hillcrest Road908-806-4050 Fleminglon NJ 08822fax 908-788-2607 e-mail micrel@blnst netInternet http//micrefnsfenerswm 96 Model Aviation WVS1WUkLFWEUIUEYIUAWiNiAUIiWiYhWWWi5iUAYb purpose going full throttle would invoke about 200 watts motor power input about 13 amps draw pack five minutes load would drain about 65 Ampere-minutes 108 Ampere-hours would leave about 0532 Ah pack now reduced power lust flying level above 65 Ampere demand would empty remaining pack charge about 532/65 494 minutes Remember chose defined half power lust flying power level So have just about five minutes flight full power five minutes flight half powerfor choice power levels Yes seems possible satisfy readers wish does really work believe does next column Ill attempt prove flight dataagain say again because rules thumb actually empiricisms based own in-air experiments 1 980s described MA Electrics series same era Meanwhile please note importance weight expression power needed just fly little less weight means lot example extent old rule thumb observation credible minimum power fly rule approximately quadratic function weightfor simple airplanes least Ive beard some noisy Electrics past now recently can believe oxymoron Amazing what time will forgotten about installation peculiarity can actually cause lot noise air ruin Electrics good quiet neighbor name several days ago got reminder friend brought newly completed Old-Timer field geared Astro 05 seven cells beautifully finished Micafilm noisy modeler felt something wrong gears talked about returning motor service took look mesh good lubed shaft OK prop seemed OK noisy dawned frame rate controller thingsespecially SS FEATHER CUT creates new standard ease accuracy cutting white blue foam wing cores ds off Precise single wire tracking concert micro-adjustable balance weights guided exclusive three-point tracking system guarantees ripple-free surfaces No trailing edge burn-out common two wire systems Couple FEATHER CUT Tekoas THERMAL GENERATOR fool proof temperature control youll Pro st time out Cuts straight taper wings fins stabilizers matically ts tape edge workbench dining table stores its own heavy duty mailing tube lete kit anodized plated components no hardware store trips ructions include cutting first wing making templates old Bow 40 52 Available Power supply required Guaranteed out perform rest Simply best TEKOA THE CENTER OF DESIGN 49380 SKYHARBOR WAY FEATHER CUT $14950 S & H SNITCH will aid trouble shooting glitch probleno microcontroller counts recordo glticheo reisoed nignal frames during flight playback later ground counting out audible tones Great tor trouble ohoot log noisy ignition system glitches try log oat different equipment configura tions Alon warns 01 interference frequency reminds torn ug receiner moot enety flight h moot naloable elec tronic accessodeo coma along recently Electronics corner Model Boilder September gb gize 1320 t 320 6d ht i6 ounce Price $3995 ULTIMATE BATTERY BACKER 6 CHANNEL GLITCH BUSTER OPTICALLY ISO LATE channels separate buttery pack servo power Totally eliminates glitching caused heany duty servos long leads giant ucule airplanes glidem can 4 5 cello tee servo side fur entra power speedl Requires installation own radio serno leads Compatible PCM radius Used Penn Racers NASA too 1S o 18 o 3/4 weight 8 ounce $4495 NEWI Now anarlable wired connectum 57995 Mini-Max Throttle BEST way insure reliableThn microprocessor power model Use withconSolleci sopor-small MINItwo battery packs two swdchMJX feaiorr kighraie no harnesses Runs MAIN packadjosimeni -setuo softtill drops Out switches to51011 BACK-UP packwan s standard 4 cell S cellstick position motoror GEL-CELL packs Batteryoff Foil safe enteosine packs can different capacity like 1200 big Solid stateglitch filter software design uses MOSFET trunsistomDesigned 1-16 cells 30 Used notensinely professionalamps 50 amps peak includes servo connector ano RPVs odd own owdob hareesses wiring 15 15 o 78 -SERMOS' cosnectom Measures lxi SoS ght 1 oz weight 8 ounce connectom 54998 NEWt Now enaileble wiredletroductory price $7995 connectors $5995 Electronic Medal Systems 22605 La Paima Ace Ste 519 Verbs Linda CA 92697 714692-1393 linfo Onlyl 908-9459979 larders Onipl $300 Shipping & Handling Per Order Credit Cards Accepted American Express Discover Mastercard & Visa SUJOOSH IEtm BAILS OUT Release scale-like Parachutistl real crowd pleaser af funl Brilliant colorsl Fl orange 1Fl pink yellaw red white blue galdl Complete Figure & release system $1895 ec plus $325 S/H Model Aviation Special Red White & Blue Red & Gold Combol $1895 325 5/Hl SEND ORDER TODAY TO HOBBY HUT MANUFACTURING 2020 W 21st St N Suite #77 WiChita KS 67203-2107 Dept MRV send SASE brochure S-n $3900 F~1 i C products 6924 E 92nd TulSo OK 74133 DEALERS WELCOME 918-492-9435 18-492-9375 nccrrono November1996 97 THERMAL GENERATOR Power Supply $11950 S & H SCREAMING OWE ATTACKS AUDIBLE FLIGHT MANEUVERS ,bO srOd O,igs iO4,iS n~ Odk,M GLOW PLUG ADAPTER FOR GLOW ENGINES SPARK PLUG ADAPTER FOR GAS ENGINES EXTRA VALVE CORES SPARE CAPS AND 0-RING Air Screamer TM Miter Cut Miter Cut allows craftsman make ac curate cuts both wood plastic Miter Cut uses standard single edge razor blades adjustable fence swings through arc precise degree marks positive stop 900 allows modeler make accurate repeatable cuts tight fits mitered corners Miter Cut excellent tool hobby requirements including * Model Airplane Ship parts 0 Model Railroad Train Layouts * Minatures Furniture Picture Frames Mitered joints rubber trims moldings such Fourmost Window Flange Canopy Trim FOURMOST PRODUCTS Look other great producte Fourmost nearest hobby dealor direct orders include $3 00 Shipping 4040 24th Avenue Forest Grove OR 71 16 B&P Associates Gives Total Flight Line FREEDOM new electrtc starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wtre get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop ___________________________________________ have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 combined gear drive large reverberation chamber like OT Micafilmcan actually growl intermediate motor speeds What actually happens gear teeth hammered together signal control rate frame rate speed control same signal frame rate transmitter usually 50 cycles per second Basically frame rate control turns motor off variable-duty cycle frame rate audible starting/stopping motor gears makes lot noise gear wear tear good gears ears Electrics quiet reputation virtually no excuse use frame rate speed controls speed controls Using on/off switches about good also some argument using Futaba Electric receiver builtin frame rate control offers beginner simplicity radios work great please dont tempted use frame rate ESCs otherwise Go high rate controls plenty market choose everything better theseincluding operational efficiency superiority midspeed Futaba Electric radio has out years otherwise great product design growing old feel its about time Futaba update popular product Id like see FM receiver built-in high-rate control will operate up 12-cell systems readily handle demanding motors range should offer soft brake option too Beyond product should come supplied popular Sermos connectors adequately heavy wire So ends both another column another column year no columns December issue because Nats coverage Frank Korman Dallas Electric Aircraft Fliers will provide coverage Electric Nats Please include SASE correspondence youd like reply dont forget Electrics fly just great Winter too 498 Model Aviation ision Cutting Tool Price $1995 Product No FOR 151 ISSMO Micro AV Competition International Society Structural Multi disciplinary Optimization ISSMO announcing Micro AV competition objective competition employ multi-disciplinary design optimization MOO design build smallest aerial vehicle AV can perform following mission Fly photograph 15-meter size symbol ground located 600 meters launch site hidden view square enclosing fence 35-meter wide 15-meter high Provide legible image symbol launching individual launch site will two prizes awarded AVs complying competition rules $1250 prize smallest AV other $1250 prize design best MOO no 15 times size AV winning first prize competition will held site near University Florida campus April 51997 copy competition rules write ISSMO President Professor Raphael Haftka Department AeMES University Florida Gainesville FL 32611-6250 email haftka@ufledu Additional information also available ISSMO home page http//wwwaeroufledulgetlissmohtm