THIS month Electric Connection Service offers two new names connect First up Charles Moulton RR 1 Box 1920 Troy VA 22974 Charles tells new area anxious connect other local E-fliers Charles favors small Electrics interested kindsNext sort twist Model Aviations own Old-Timer Free flight columnist Bill Baker sent note offering help other Electrically oriented modelers area Bills personal Electric preference Soaring has broad-based interest evidenced photo December 91 column Electric Sunny bipe Feel free contact Bill 1902 Peter Pan Norman OK 73072 tell im Bob sent ya motor noise Joe Utazi head modeler JOMAR prompted December column subject motor noise provide related information ponder As refresher column discussed radio interference resulting very fast waveform edges switched motor voltage can associated ordinary speed control operationJoe wrote advise has recently incorporated carefully controlled .... 50 WII IMinutes DuratIon 62 Model Aviation Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 THIS MONTHS TOPICS 1 Electric Connection Service 2 Motor NoiseEven 3 Speed Controls Tidbits 4 EAASome Follow-up 5 US F3E Effort 6 Senior Skyvolt flight Profile Flightec SEC-Il speed control speced operate motors up 40 cobalts Bob Shipton Detroit holding 1700 sq neresnaw ig agiet UI U D Energy storage eighteen 1200s Motivation geared cobalt 40 turnIng Master Airscrew 14 x 6 Model actual size original Old-Timer 60 40 30 20 10 Dr Cohn McKinley Winston-Salem NC about set deBolt Bipe down takeoff Scene 1991 Labor Day VFRCS meet Selinsgrove PA Vintage affair brought out RCs fifties early sixtiesseveral electrified FOR INFORMATION CONTACT Show Directors RON STAHL 4521 Bellvieu Ave Baltimore MD 21215 410-664-2712 DAVE MITCHELL 410-668-6690 MARC SH MID ATLANTIC RADIO CONTROL JUNE 6 7 1992 Saturday 9 am 5 pm Sunday 10 am 4 pm MARYLAND STATE FAIR GROUNDS TIMONIUM MARYLAND Sponsored c RADIO CONTROL MODELERS BALTIMORE PADONIA RD TO FREDRICK TIMONIUM RD95 BALTIMORE BALTO WASH PKWYA TO WASHINGTONNORTH Over 100 Manufacurers Static Displays Swapshop Radio Kit & Equipment Raffle Door Prizes Free Parking 5000 Cars Refreshment Centers Indoor & Outdoor Demonstrations Factory Teams Aircraft Cars Boats Radios Engines Transmitter Testing 9000 Gallon Outdoor Boat Pond RIC Car Racing AS ALWAYS SELLING SHOW rise time MOSFET gates speed control products preclude particular kind potential interferenceHeres brief tutorial MOSFET used speed controls used switch apply motor battery voltage motor MOSFET three terminal device wherein three parts component source drain gate Normally several MOSFETS used parallel share motor current hurdenThink combined sources drains themselves switch source always wired motor battery negative drain wired motor terminal other motor terminal connected motor battery positive parallel gates can thought sort switch handle positive voltage applied gates parallel drainsource pairs conduct switch closes motor runs gate control voltage comes rest electronics speed control decodes received throttle signal like servo would faster control voltage applied gate faster switch closesThus drive waveform gate slowed down motor voltage switching also slower slower latter waveform less radiated interference present Keep Continued page 160 April 1992 63 SWAP SHOP $10 FULL TABLE PER DAY NO DEALERS PLEASE Limit 2 tables per person -SWAP SHOP ONLYFor Pre-Registration call WAYNE MELLOR 410-788-3742 evenings ieciric conversion OT iaewaters IIaymate 40 klt rendered John Hickey Hatfield PA Astro 40 geared cobalt eighteen 1200s JOMAR speed control Plane 5 314 lb up John eventually substituted dural formed gear wire version shown Beautiful Ford TnMotor L built Paul McEntarfer Waterford CT based RCM plans wet power Its 1112 scale 74-In span up 108 oz Electric Challenge R Charles Evans Clarcona FL charges motor pack solar rack control box bought lots solar flashlights stripped out goodies serleslparalleled solar cells Talk about flying freel THREADS Use sleeves material CA will bond Six sizes2 #4 #6 #8 #10 1/4 x 20 Perfect hatches cowls canopies engines servos landing gears wings anything mounts machine screw metal screw thread Uses depend imagination Color sleeve denotes size Can used thread lockers mind speed still order tens millionths secondPlease note switching speed related speed control switching rate latter either frame rate high rate latter terms describe often cycles per second battery voltage applied motor Frame rate usually about 50 times second High rate usually several thousand times per secondThe December 1989 column discussed relative merits both types think initiated demise frame rate controls model aircraft applications say because following appearance column frame rate AUL bUMW Ohio % 11376 Ridgeway Road Kensington OH 44427 controls seemed disappear market although such effect intent column offeringNow back track Carefully controlled just buzzword means something such thing having gate waveforms too slow leads inefficient speed control operation especially high rate controls summary motor drive waveform thats too fast may result radio interference thats too slow will likely result hot MOSFETSor worse Joes products optimized betweenJoe also tells has found powersystem-related interference can greater high resistance batteries has found cell types such SCEs .. somehow seem exacerbate noise situation. compared SCRs Ill admit Im sure understand coming Joea pioneer Electric speed control technologyI accept itIn same letter Joe also noted has recently upgraded popular SM series speed controls changing board FR4 material instead ceramic type new material crash resistant addition JOMAR B&P Associates Gives Total Flight Line FREEDOM battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire 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 has incorporated upgraded automotivetype regulator design tolerant line spikesIncidentally SM means surface mount refers parts Joe uses products leadless components simply surface-soldered place opposed leaded components soldered PC board holes results significant size reduction finished assemblies Several manufacturers now using surface mount technologyFinally Joe has asked Id pass along fact JOMAR has new address Its JOMAR 8606 Susanview Lane Cincinnati OH 45244 Tel 5 13/4740985 High rates cant help being amused some advertising Ive noticed lately seems recenfly manufacturers speed controls RC cars have caught merits high rate techniques now number such devices being offeredThe amusing part advertising continuing trend some RC car control suppliers trying out-spec competitors parameter seems used way speed control current rating Ive seen controls presented being capable handling 600 amps overkill say least Amusing though Heres whyConsider new Astro Zero Loss connectors discussed September 1991 column reported samples displayed contact resistance approximately 228 micro-ohms Thats Conunued page 162 160 Model Aviation ALL price $169 package B 216-223-1950 RC Electrics/Kopski Continued page 63 Obechi Large Sheets Please call 404 642-0645 send SASE #7 Creekpark Ct Roswdll GA 30076 its scak kits engines accessories want & want em now got emFrank Tiano .boat car kits hardto-find pans & anything need want.its stock Joe Manzella SHIPPED WITHIN 24 HRS 1387 N Military Trail West Palm Deach FL 3240 407-688-d3669 HOBBY SUPER IUKL Qj~ R/C GOODIES VL PRODUCTS FLITE SYSTEMS VL-111 SYSTEM MOTOR REDUCTION GEAR BOX 2 PROPS 852 BATrERY CHGE CQRD 32 GRAMS F-F MODELS TO 30 INCH SPAN 2495 VL-I11R SYSTEM SAME AS VL111 EXCEPT REMOTE BArr MOUNTING $2795 VL-102 SYSTEM F-F OR LITE R/C MODELS 2550 IN SPAN POWERFUL HYTORK MOTOR & GEARBOX PROP 3-CELL BATT SWITCH & CHGE CORD SYSTEM WEIGHT 71 GRAMS -$3295 MASTER AIRSCREW FEATURES COMPACT DESIGN HIGH QUALITY GEARS & BEARINGS THREE GEAR RATIOS AVAIL ABLE FOR ELECTRIC FLIGHT 25 30 351 SPECIFV FOR 05 ELECTRIC REG $1595 S&H $250 0000228 ohmsvery low resistance indeed Now consider 600 amps flowing through resistance cant imagine such current levels could possibly come lets pretend anyway associated connector power loss contact would PR 600 x 600 x 0000228 82 watts Thats 164 watts two-pin connector Instant meltdown see itAn amusing calculation would associated wire Lets assume power system installation uses foot #16 wire wire has resistance about 442 milliohms 000442 ohms per foot 600 amps flowing voltage loss wire alone would x R 600 x 000442about 27 volts associated power loss would MINI ELECTRIC SYSTEMS AND ELECTRIC GEAR BOXES HILINE PRODUCTS FLITE SYSTEM$ MINI-B F-F SYSTEM 6W MOTOR SW HARNESS PROP 3 X 100 NICADS FOR MODELS 3-5 OZ. 100-150 SOIN WING AREA -47 GRAMS $2995 IMP-30 F-F OR SMALL R/C TO 10 OZ & 150 SO IN SYSTEM WITH 30 WATT MOTOR 5 X 3 PROP SWITCH HARNESS 3 275 MA NICADS SYSTEM WEIGHT 115 GRAMS 3095 W/MOTORR/C PLANES 6 X 4 PROP SWITCH250-300 HARNESS4 X 800 NICADS5Q IN WEIGHT 230 GRAMS$4595 ADD $450 S & H FOR ANY SYSTEM IN THIS AD COMPLETE BROCHURE GIVES DETAILS ON ALL ABOVE UNITS AS WELL AS ALL ASTRO FLIGHT SYSTEMS & ACCESSORIES AVAILABLE FROM CHARLIES R/C GOODIES voltage times current producing 27 x 600 watts wire molten metal Sometimes think car guys have flights fancy aeromodelersMaybe Im missing something sort hype seems like just that dont see merit such seemingly ridiculous speed control rating Its sort like installing thumb tack sledge hammerOn other hand since readily admit knowing everything someone can enlighten regarding merits such specifications Id happy add knowledge bank share readers column future Meanwhile Im suggesting readers swayed such offerings seemingly excessive example aboveNow something substantive Recently reader advised problem experienced using RCD receiver Flightec speed control According reader Charles Evans RCD output pulse voltage just about three volts u QUALITY FIBERGLASS FRENCH TR-260 1* Four-StrokeEngine KITS IU 416 587-3610I TR-260I SPAN 71 AREAB58sq ENG 90-120 4 CYCLE si~S WT APPROX 7585 LB-w k1T FEATURES3 $18499 USLIGHTWEIGHT FIBERGLASS FUSELAGE COWL CANOPY AND U ORDER BY PHONE 7 DAYS WEEKWHEEL PANTS BALSA COVERED FOAM WING WITH LE-TE IN PLACEAND SANDED SELECTED BALSA 416 5204192CUT STAB RUDDER ELEVATORS & AILERONS T6 ALUMINUM ADD $1500 postageLANDING GEARS HARDWARE AND INSTRUCTIONSInfo $200g QUADROTECH Fax 416 283-6538 low 2 weeks delnery 3148 KINGSTON RD STE 202 BOX 158 SCARBOROUGH ONT MiM 1P4 CANADA ghtec control needs operate Charles wound up using interface buffer circuit convert receiver output higher voltage swing now wellUpon receipt letter pulled RCD Senior Skyvolt sure enough servo drive pulses just little over three volts Now happens plane has Horak control pulled see just what input signal necessary run itI have servo tester good speed controls too has adjustable output level control Using found particular speed control operates below volt input clearly particular receiver/speed control combo very workable other hand also have receivers output three volts other speed controls dont know necessary input pulse minimum amplitude guess Ive just managed avoid incompatible combinations up now paying attention possibility such potential problems 1 hope clear information offered critique products particular rather note some incompatible combinations products occur Specifically neither named product above individually deficientI know lots folks very successfully using both products mentioned other combinationswith no problems am fact can see could mix varied manufacturers receivers Continued page 164 STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CIJVTING PLASTIC WOOD SOFT MEFALS LEXAN PLEXIGLASS & ETC AVAILABLE IN 006000 010 012 014 LI016 018 020 023 025 DLAMETER @ $075 EA 1 OUTSIDE032 THICKNESS NO 5 R $800 NO 503PXO14X1I4SAW$6OO OUR SAWS ONLY WORK WFFH OUR ARBOR MICRO 5ELF5TARTING TORCH No need flint matches Just press Piezo SeIf-Startisg button mcrn srze adjustable flame fhat burns 2370 uy 3 hours Operates us standard cigarette lighter butane refillable Task fits comfortably patm hand made high-impact rubber allows safe non stip comfortabte grip Supplied can butane MT775 Blow Torch$3500 IwilS nan MT77S Butane S oz$600 EASTERN TOOL& SUPPLY CO 149 GRAND ST NYC NY 10013 WRRE FOR CATALOG$300 ORDERS 212-925-1000 WHEN ORDERING PPD ADD $300 OFFICE 212-226-3749 CODADD$500 FAX212-925-1010 162 Model Aviation 4 KK Cash Prices Bold Type Add 6% Charge Cards Minimum Charge $2500 No CODs 20% Deposit Add Sales Tax Sales California Catalog $100 USA $300 Foreign 2828 Cochran St SuIte 281 V 3065 80552791148055B1 5061 alley Rubber & Engine Power Free FlIght Diepley Control Une Electric Power RJC Airplanes new Illustrated 32 page tabloId sIze catalog US ft Canada $100 Foreigh $300 Penn Valley Hobby Center B37-AW Main Se Lanedale PA 19440 215- 368-0770 FULLR PM 55 CHUCK$1 895 DREMEL 850395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCI p ULTRAFET CONTROLLER 111011 RATE motor controller $8995 8200 liz switching frequency Active Gate Drive Conleolind Rise Time cJrcuiby pravide linear response smooth acceleration higher efficiency lens motor heating other units ft 12 cell operation 18 volts maximum SMART SWITCII kMOSFET motor switch $4995 soft-start circuit reduces motor model torque stress during power up ft 10 cell operation 115 volts matimumi common features shared ULIIIAI1ET COUROLLER & SMART SWITCH Only highest current lowest on-resistance MOSIETs available have utilized lJltruFet Controller Smart Switch have continuous current rating 240 amps 100015 ohms 120 amps 0003 ohms respectively heatsink may required high motor currents and/or estendeci ran times Smart Switchs current capahility may increased 180 amps 0002 ohms 240 amps 1000 15 Ohms larger motors and/or higher performance additional $10 $20 respectively ispecify ordering nattery Eliminator Circuit defeatabie allows nirad pack power both motor receiver Low Voltage Cutoff defeatahie uses low dropout regulator shuts down motor hattery reaches ft volts allows longer motor rans compared Other systems AC DC hysteresis techniques am employed such motor turns off shatryly cutoff voltage prevent motor 1mm coming hack battery voltage rises Will work AM IM PCM radios Auto Turn Off shuts down motor receiver signal lost An Input Isolation nuffer prevents erratic motor control due sticky high current servos staff-up glitch tilter prevents motor fmm reining power up Unit shipped tinned leads Also availahie Futaha connector 8700 additional KK rumrrvwu,unu VATIVE ELECTRONICS L4L~iIYuJ1II OT DESIGN 304 Eon SouL Hodeos flese lt.epObleu 03051 603-882-6022 servos could run similar incompatibilities offering made sole purpose advising such possibilitiesFrom above have new installation brand receiver brand B speed control combo doesnt work check possible incompatibility before fall prey believing did something wrong start rewiring everything Thanks sharing experience us Charlcs EAA February issue described what appeared to nobody home situation EAAthis virtue own several letters checks bringing no response recent telephone conversation Steve Neu Prepaid Orders Money Order CurStied Chuck Shipping 8 Handling $000 COO Orders Cash Ceitilied Check collected delivery Add Sd 00 above amounts PACIORY DIRECF ONLY prices Specifications am Suhiect Change Without Notice Designed Manufactured USA US F3E Team fame learned situation EAA related few interested folks trying work being able alone forever Some have just given upI understand Ive seen kind situation both modeling other aspects life well Indeed clubs characterized having 10% active core seems everything rest roster aside offering occasional criticisms whats going otherwise just flies freeOften members active core simply give up Anyway understand EAA now bit standstill some discussion revitalization future So like have written and/or sent dues money EAA past have no response part least explanation Stay tuned.. Speaking Steve Neu Id like pass along some thoughts time regarding US F3E its efforts first met Steve 1991 KRC meet dazzled everyone spectacular performance F3E machines So impressed officers members KRC club voted send donation support Team effortan action beyond scope 1991 club budgetNow Im well aware average readers column largely sport fliers little no competitive interest too must admit perceive US F3E effort worthy Electric cause its own right Im suggesting also might want consider lending some support either individual clubI have offered Steve some column space can fully describe F3E activity way Im hoping help muster broad-based support team scheduled compete August 1992 So again stay tuned.. Senior Skyvolt flight profile follows Last months column included similar presentation Electrified Seniorita got idea another graph totally different plane might interest Seniorita Senior Skyvolt two planes Ive flying recentlyThe plot time chart shown column characterizes 259 flights big Skyvolt including some pilots other myself As shown flight time presented 15-second increments clear histogram Senior Confinued page 166 Box 1063 Lorain Ohio 44055 MICRA Phone 216 282-8354 PA 16 Clipper Taylororaft U Horn A4 an Mosquto Big Flying Scale Kits Over Two Foot Span *Piper Cub1495 *Slinson 1251495 *Piper PA-161495 Semi-Scale Kits C02 Rubber Power 22Span *TayorcrSft1095 *StinSon voyager1095 *PC-6 Porler1095 Contest-Sport Kits * Hornet Embryo995 * Hornet P-301495 FitS F-30 & Pee Wee Rules Outdoor Peanut Scale Kits 13Span *Cub895 *Slinnon 125895 *Vagabond895 *Farman895 *Jode895 *Fike995 1/2 RIO Gas Electric Kits Fits Astro 035 Taylorcraft3995 Stinson 1253995 HARD TO FIND ITEMS Brown 002 Motors Accessories Over 20 Sizes Rubber Stripl Japanese Tissue Super Fine Balsa Sheets & Strips Add 10% Shipping Minimum Shipping CATALOG $200 164 Model Aviation KINGSWAY R/C HOBBY SUPPLY Spectahlzlng RIC Aircraft Supplies SS81 Rlchorond7139778141 Hounlon TX 77058us WATTS 18008217783 maj1or decalsOver85O Select *7-1/4 Scale & S Giant Scaie38Sheets 38Sheets 38Sheds *Propeller Decals WT onle 7 Sheels3sizeson ea ABCD___ .40 Size Markings or8Sheels FSiaes-12 * Nomenelalure 42 0SAEE*Leilers Numbers 11 Colors See coior eharl L * Flags American Uniled Kingdom Contetierale * Slats 11 Colors 9 Sizes plus Sheel 01 Assorted Sites * Trim Sheets 43/4 28 ii Colors See churl zz * Aircraft Markings84 Sets * Squadron Insignias174 SeIs DECALS3OO PRESSURE SENSITIVE R TRANSFER Authentic model insignias pressure sensrttne mater Iranster 1/4 scale 40 80 ntis stars flags tellers numhers trim r decals size propeller decals World War II kill mark sheelsuO$II NORTHEAST SCREEN GRAPHICS 21 FISHER AVE EAST LONGMEADOW MA 01028 TEL 413 528 4110 w- Write today catalogue w- We guarantee prices complete No hidden charges w- We pay shipping ship immediately $300 catalogue charge refundable first order $20 100 PARK AVENUE CARMECHAELS PA 15320 Skyvolt basically five- six-minute airplane flights falling much outside numbers generally experimental some way mean shorter longer flights may have included incomplete charges prop changes flights cruise power levels etc such atypical As refresher Senior simply scale-up Skyvolt January 1991 MA discussed some detail article weighs 85 oz has 600 sq area Motivation cobalt 40 direct Energy storage eighteen 1200 mAh SCRsThis plane best performer very capable aerobatic craft Indeed better flier am pilot have handed controls some Largest Supplier STERLING Control Line Kits Over 34 choose highly skilled pilots seen some things done done plane case plane flown lot differently Seniorita such flight profile decidedly different can refer March issue compare twoFor reference purposes unlike Seniorita Senior Skyvolt almost always flown through essentially continuous maneuvers play throttle flight long according need ie attempting conserve energy needed order make available needed feel results best overall flight possibleA maneuver set particularly like use promote Electric take off immediately roll inverted low ground climb through half loop roll inverted again hold attitude short distance finally pull inverted snapall within seconds takeoff sequence has convinced Electric disbelieverLike Senioritas Senior Skyvolts pack always time-charged using timer control several chargers have suppose peak charging would add some flight times presented dont care wait extra five minutes during charge just get few tens seconds air time After Im sport flierSo closes April column Please sure enclose SASE correspondence youd like reply Happy Electric Springtime Landings Everyone RC Soaring/Blakeslee Continued page 65 thermal Tall grass will serve good telltale wind direction Watch what other gliders doing sky flight characteristics can show whether sink lift strong lift may want join However too high above bubble may already detached could get caught too far away sufficient altitude make return trip landing zone Along same lines study pattern passing thermals watching gliders marking Pay attention location altitude time wind direction Under same conditions thermal generators usLially kick off thermals regular intervals known cycling information can increase odds continued page 168 k9 rn-k R/C Flight Simulator IBM PCs & Compatibles Excellent flight equations Superb graphics Easily set up fly like bird features aid learning Skylark realistic RIC flight simulator available todayl Visit booth Toledo Call Now 313 662-LARK 166 Model Aviation Flying ~The way meant thats beauty Control Line Planes want experience flying way meant way American pioneers like Charles Lindbergh flew FEEL airplane Control Line Planes ic9oA g has worlds largest selection control-line planes equipment including hard-to-find classics LATHESeLATHESOLATHESOLATHES ~SENO $100 1LJBLUEALETIU FOR pJo/uc4einvMeoLarnc COMPLETE CATALOG __CONTAINING 2-3538MANY FAMOUS cATALOG $100NAME LATHES PO Box 536-Ye Hurricane WV 25526 Airplane version coming soon
Edition: Model Aviation - 1992/04
Page Numbers: 62, 63, 160, 162, 164, 166
THIS month Electric Connection Service offers two new names connect First up Charles Moulton RR 1 Box 1920 Troy VA 22974 Charles tells new area anxious connect other local E-fliers Charles favors small Electrics interested kindsNext sort twist Model Aviations own Old-Timer Free flight columnist Bill Baker sent note offering help other Electrically oriented modelers area Bills personal Electric preference Soaring has broad-based interest evidenced photo December 91 column Electric Sunny bipe Feel free contact Bill 1902 Peter Pan Norman OK 73072 tell im Bob sent ya motor noise Joe Utazi head modeler JOMAR prompted December column subject motor noise provide related information ponder As refresher column discussed radio interference resulting very fast waveform edges switched motor voltage can associated ordinary speed control operationJoe wrote advise has recently incorporated carefully controlled .... 50 WII IMinutes DuratIon 62 Model Aviation Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 THIS MONTHS TOPICS 1 Electric Connection Service 2 Motor NoiseEven 3 Speed Controls Tidbits 4 EAASome Follow-up 5 US F3E Effort 6 Senior Skyvolt flight Profile Flightec SEC-Il speed control speced operate motors up 40 cobalts Bob Shipton Detroit holding 1700 sq neresnaw ig agiet UI U D Energy storage eighteen 1200s Motivation geared cobalt 40 turnIng Master Airscrew 14 x 6 Model actual size original Old-Timer 60 40 30 20 10 Dr Cohn McKinley Winston-Salem NC about set deBolt Bipe down takeoff Scene 1991 Labor Day VFRCS meet Selinsgrove PA Vintage affair brought out RCs fifties early sixtiesseveral electrified FOR INFORMATION CONTACT Show Directors RON STAHL 4521 Bellvieu Ave Baltimore MD 21215 410-664-2712 DAVE MITCHELL 410-668-6690 MARC SH MID ATLANTIC RADIO CONTROL JUNE 6 7 1992 Saturday 9 am 5 pm Sunday 10 am 4 pm MARYLAND STATE FAIR GROUNDS TIMONIUM MARYLAND Sponsored c RADIO CONTROL MODELERS BALTIMORE PADONIA RD TO FREDRICK TIMONIUM RD95 BALTIMORE BALTO WASH PKWYA TO WASHINGTONNORTH Over 100 Manufacurers Static Displays Swapshop Radio Kit & Equipment Raffle Door Prizes Free Parking 5000 Cars Refreshment Centers Indoor & Outdoor Demonstrations Factory Teams Aircraft Cars Boats Radios Engines Transmitter Testing 9000 Gallon Outdoor Boat Pond RIC Car Racing AS ALWAYS SELLING SHOW rise time MOSFET gates speed control products preclude particular kind potential interferenceHeres brief tutorial MOSFET used speed controls used switch apply motor battery voltage motor MOSFET three terminal device wherein three parts component source drain gate Normally several MOSFETS used parallel share motor current hurdenThink combined sources drains themselves switch source always wired motor battery negative drain wired motor terminal other motor terminal connected motor battery positive parallel gates can thought sort switch handle positive voltage applied gates parallel drainsource pairs conduct switch closes motor runs gate control voltage comes rest electronics speed control decodes received throttle signal like servo would faster control voltage applied gate faster switch closesThus drive waveform gate slowed down motor voltage switching also slower slower latter waveform less radiated interference present Keep Continued page 160 April 1992 63 SWAP SHOP $10 FULL TABLE PER DAY NO DEALERS PLEASE Limit 2 tables per person -SWAP SHOP ONLYFor Pre-Registration call WAYNE MELLOR 410-788-3742 evenings ieciric conversion OT iaewaters IIaymate 40 klt rendered John Hickey Hatfield PA Astro 40 geared cobalt eighteen 1200s JOMAR speed control Plane 5 314 lb up John eventually substituted dural formed gear wire version shown Beautiful Ford TnMotor L built Paul McEntarfer Waterford CT based RCM plans wet power Its 1112 scale 74-In span up 108 oz Electric Challenge R Charles Evans Clarcona FL charges motor pack solar rack control box bought lots solar flashlights stripped out goodies serleslparalleled solar cells Talk about flying freel THREADS Use sleeves material CA will bond Six sizes2 #4 #6 #8 #10 1/4 x 20 Perfect hatches cowls canopies engines servos landing gears wings anything mounts machine screw metal screw thread Uses depend imagination Color sleeve denotes size Can used thread lockers mind speed still order tens millionths secondPlease note switching speed related speed control switching rate latter either frame rate high rate latter terms describe often cycles per second battery voltage applied motor Frame rate usually about 50 times second High rate usually several thousand times per secondThe December 1989 column discussed relative merits both types think initiated demise frame rate controls model aircraft applications say because following appearance column frame rate AUL bUMW Ohio % 11376 Ridgeway Road Kensington OH 44427 controls seemed disappear market although such effect intent column offeringNow back track Carefully controlled just buzzword means something such thing having gate waveforms too slow leads inefficient speed control operation especially high rate controls summary motor drive waveform thats too fast may result radio interference thats too slow will likely result hot MOSFETSor worse Joes products optimized betweenJoe also tells has found powersystem-related interference can greater high resistance batteries has found cell types such SCEs .. somehow seem exacerbate noise situation. compared SCRs Ill admit Im sure understand coming Joea pioneer Electric speed control technologyI accept itIn same letter Joe also noted has recently upgraded popular SM series speed controls changing board FR4 material instead ceramic type new material crash resistant addition JOMAR B&P Associates Gives Total Flight Line FREEDOM battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire 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 has incorporated upgraded automotivetype regulator design tolerant line spikesIncidentally SM means surface mount refers parts Joe uses products leadless components simply surface-soldered place opposed leaded components soldered PC board holes results significant size reduction finished assemblies Several manufacturers now using surface mount technologyFinally Joe has asked Id pass along fact JOMAR has new address Its JOMAR 8606 Susanview Lane Cincinnati OH 45244 Tel 5 13/4740985 High rates cant help being amused some advertising Ive noticed lately seems recenfly manufacturers speed controls RC cars have caught merits high rate techniques now number such devices being offeredThe amusing part advertising continuing trend some RC car control suppliers trying out-spec competitors parameter seems used way speed control current rating Ive seen controls presented being capable handling 600 amps overkill say least Amusing though Heres whyConsider new Astro Zero Loss connectors discussed September 1991 column reported samples displayed contact resistance approximately 228 micro-ohms Thats Conunued page 162 160 Model Aviation ALL price $169 package B 216-223-1950 RC Electrics/Kopski Continued page 63 Obechi Large Sheets Please call 404 642-0645 send SASE #7 Creekpark Ct Roswdll GA 30076 its scak kits engines accessories want & want em now got emFrank Tiano .boat car kits hardto-find pans & anything need want.its stock Joe Manzella SHIPPED WITHIN 24 HRS 1387 N Military Trail West Palm Deach FL 3240 407-688-d3669 HOBBY SUPER IUKL Qj~ R/C GOODIES VL PRODUCTS FLITE SYSTEMS VL-111 SYSTEM MOTOR REDUCTION GEAR BOX 2 PROPS 852 BATrERY CHGE CQRD 32 GRAMS F-F MODELS TO 30 INCH SPAN 2495 VL-I11R SYSTEM SAME AS VL111 EXCEPT REMOTE BArr MOUNTING $2795 VL-102 SYSTEM F-F OR LITE R/C MODELS 2550 IN SPAN POWERFUL HYTORK MOTOR & GEARBOX PROP 3-CELL BATT SWITCH & CHGE CORD SYSTEM WEIGHT 71 GRAMS -$3295 MASTER AIRSCREW FEATURES COMPACT DESIGN HIGH QUALITY GEARS & BEARINGS THREE GEAR RATIOS AVAIL ABLE FOR ELECTRIC FLIGHT 25 30 351 SPECIFV FOR 05 ELECTRIC REG $1595 S&H $250 0000228 ohmsvery low resistance indeed Now consider 600 amps flowing through resistance cant imagine such current levels could possibly come lets pretend anyway associated connector power loss contact would PR 600 x 600 x 0000228 82 watts Thats 164 watts two-pin connector Instant meltdown see itAn amusing calculation would associated wire Lets assume power system installation uses foot #16 wire wire has resistance about 442 milliohms 000442 ohms per foot 600 amps flowing voltage loss wire alone would x R 600 x 000442about 27 volts associated power loss would MINI ELECTRIC SYSTEMS AND ELECTRIC GEAR BOXES HILINE PRODUCTS FLITE SYSTEM$ MINI-B F-F SYSTEM 6W MOTOR SW HARNESS PROP 3 X 100 NICADS FOR MODELS 3-5 OZ. 100-150 SOIN WING AREA -47 GRAMS $2995 IMP-30 F-F OR SMALL R/C TO 10 OZ & 150 SO IN SYSTEM WITH 30 WATT MOTOR 5 X 3 PROP SWITCH HARNESS 3 275 MA NICADS SYSTEM WEIGHT 115 GRAMS 3095 W/MOTORR/C PLANES 6 X 4 PROP SWITCH250-300 HARNESS4 X 800 NICADS5Q IN WEIGHT 230 GRAMS$4595 ADD $450 S & H FOR ANY SYSTEM IN THIS AD COMPLETE BROCHURE GIVES DETAILS ON ALL ABOVE UNITS AS WELL AS ALL ASTRO FLIGHT SYSTEMS & ACCESSORIES AVAILABLE FROM CHARLIES R/C GOODIES voltage times current producing 27 x 600 watts wire molten metal Sometimes think car guys have flights fancy aeromodelersMaybe Im missing something sort hype seems like just that dont see merit such seemingly ridiculous speed control rating Its sort like installing thumb tack sledge hammerOn other hand since readily admit knowing everything someone can enlighten regarding merits such specifications Id happy add knowledge bank share readers column future Meanwhile Im suggesting readers swayed such offerings seemingly excessive example aboveNow something substantive Recently reader advised problem experienced using RCD receiver Flightec speed control According reader Charles Evans RCD output pulse voltage just about three volts u QUALITY FIBERGLASS FRENCH TR-260 1* Four-StrokeEngine KITS IU 416 587-3610I TR-260I SPAN 71 AREAB58sq ENG 90-120 4 CYCLE si~S WT APPROX 7585 LB-w k1T FEATURES3 $18499 USLIGHTWEIGHT FIBERGLASS FUSELAGE COWL CANOPY AND U ORDER BY PHONE 7 DAYS WEEKWHEEL PANTS BALSA COVERED FOAM WING WITH LE-TE IN PLACEAND SANDED SELECTED BALSA 416 5204192CUT STAB RUDDER ELEVATORS & AILERONS T6 ALUMINUM ADD $1500 postageLANDING GEARS HARDWARE AND INSTRUCTIONSInfo $200g QUADROTECH Fax 416 283-6538 low 2 weeks delnery 3148 KINGSTON RD STE 202 BOX 158 SCARBOROUGH ONT MiM 1P4 CANADA ghtec control needs operate Charles wound up using interface buffer circuit convert receiver output higher voltage swing now wellUpon receipt letter pulled RCD Senior Skyvolt sure enough servo drive pulses just little over three volts Now happens plane has Horak control pulled see just what input signal necessary run itI have servo tester good speed controls too has adjustable output level control Using found particular speed control operates below volt input clearly particular receiver/speed control combo very workable other hand also have receivers output three volts other speed controls dont know necessary input pulse minimum amplitude guess Ive just managed avoid incompatible combinations up now paying attention possibility such potential problems 1 hope clear information offered critique products particular rather note some incompatible combinations products occur Specifically neither named product above individually deficientI know lots folks very successfully using both products mentioned other combinationswith no problems am fact can see could mix varied manufacturers receivers Continued page 164 STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CIJVTING PLASTIC WOOD SOFT MEFALS LEXAN PLEXIGLASS & ETC AVAILABLE IN 006000 010 012 014 LI016 018 020 023 025 DLAMETER @ $075 EA 1 OUTSIDE032 THICKNESS NO 5 R $800 NO 503PXO14X1I4SAW$6OO OUR SAWS ONLY WORK WFFH OUR ARBOR MICRO 5ELF5TARTING TORCH No need flint matches Just press Piezo SeIf-Startisg button mcrn srze adjustable flame fhat burns 2370 uy 3 hours Operates us standard cigarette lighter butane refillable Task fits comfortably patm hand made high-impact rubber allows safe non stip comfortabte grip Supplied can butane MT775 Blow Torch$3500 IwilS nan MT77S Butane S oz$600 EASTERN TOOL& SUPPLY CO 149 GRAND ST NYC NY 10013 WRRE FOR CATALOG$300 ORDERS 212-925-1000 WHEN ORDERING PPD ADD $300 OFFICE 212-226-3749 CODADD$500 FAX212-925-1010 162 Model Aviation 4 KK Cash Prices Bold Type Add 6% Charge Cards Minimum Charge $2500 No CODs 20% Deposit Add Sales Tax Sales California Catalog $100 USA $300 Foreign 2828 Cochran St SuIte 281 V 3065 80552791148055B1 5061 alley Rubber & Engine Power Free FlIght Diepley Control Une Electric Power RJC Airplanes new Illustrated 32 page tabloId sIze catalog US ft Canada $100 Foreigh $300 Penn Valley Hobby Center B37-AW Main Se Lanedale PA 19440 215- 368-0770 FULLR PM 55 CHUCK$1 895 DREMEL 850395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCI p ULTRAFET CONTROLLER 111011 RATE motor controller $8995 8200 liz switching frequency Active Gate Drive Conleolind Rise Time cJrcuiby pravide linear response smooth acceleration higher efficiency lens motor heating other units ft 12 cell operation 18 volts maximum SMART SWITCII kMOSFET motor switch $4995 soft-start circuit reduces motor model torque stress during power up ft 10 cell operation 115 volts matimumi common features shared ULIIIAI1ET COUROLLER & SMART SWITCH Only highest current lowest on-resistance MOSIETs available have utilized lJltruFet Controller Smart Switch have continuous current rating 240 amps 100015 ohms 120 amps 0003 ohms respectively heatsink may required high motor currents and/or estendeci ran times Smart Switchs current capahility may increased 180 amps 0002 ohms 240 amps 1000 15 Ohms larger motors and/or higher performance additional $10 $20 respectively ispecify ordering nattery Eliminator Circuit defeatabie allows nirad pack power both motor receiver Low Voltage Cutoff defeatahie uses low dropout regulator shuts down motor hattery reaches ft volts allows longer motor rans compared Other systems AC DC hysteresis techniques am employed such motor turns off shatryly cutoff voltage prevent motor 1mm coming hack battery voltage rises Will work AM IM PCM radios Auto Turn Off shuts down motor receiver signal lost An Input Isolation nuffer prevents erratic motor control due sticky high current servos staff-up glitch tilter prevents motor fmm reining power up Unit shipped tinned leads Also availahie Futaha connector 8700 additional KK rumrrvwu,unu VATIVE ELECTRONICS L4L~iIYuJ1II OT DESIGN 304 Eon SouL Hodeos flese lt.epObleu 03051 603-882-6022 servos could run similar incompatibilities offering made sole purpose advising such possibilitiesFrom above have new installation brand receiver brand B speed control combo doesnt work check possible incompatibility before fall prey believing did something wrong start rewiring everything Thanks sharing experience us Charlcs EAA February issue described what appeared to nobody home situation EAAthis virtue own several letters checks bringing no response recent telephone conversation Steve Neu Prepaid Orders Money Order CurStied Chuck Shipping 8 Handling $000 COO Orders Cash Ceitilied Check collected delivery Add Sd 00 above amounts PACIORY DIRECF ONLY prices Specifications am Suhiect Change Without Notice Designed Manufactured USA US F3E Team fame learned situation EAA related few interested folks trying work being able alone forever Some have just given upI understand Ive seen kind situation both modeling other aspects life well Indeed clubs characterized having 10% active core seems everything rest roster aside offering occasional criticisms whats going otherwise just flies freeOften members active core simply give up Anyway understand EAA now bit standstill some discussion revitalization future So like have written and/or sent dues money EAA past have no response part least explanation Stay tuned.. Speaking Steve Neu Id like pass along some thoughts time regarding US F3E its efforts first met Steve 1991 KRC meet dazzled everyone spectacular performance F3E machines So impressed officers members KRC club voted send donation support Team effortan action beyond scope 1991 club budgetNow Im well aware average readers column largely sport fliers little no competitive interest too must admit perceive US F3E effort worthy Electric cause its own right Im suggesting also might want consider lending some support either individual clubI have offered Steve some column space can fully describe F3E activity way Im hoping help muster broad-based support team scheduled compete August 1992 So again stay tuned.. Senior Skyvolt flight profile follows Last months column included similar presentation Electrified Seniorita got idea another graph totally different plane might interest Seniorita Senior Skyvolt two planes Ive flying recentlyThe plot time chart shown column characterizes 259 flights big Skyvolt including some pilots other myself As shown flight time presented 15-second increments clear histogram Senior Confinued page 166 Box 1063 Lorain Ohio 44055 MICRA Phone 216 282-8354 PA 16 Clipper Taylororaft U Horn A4 an Mosquto Big Flying Scale Kits Over Two Foot Span *Piper Cub1495 *Slinson 1251495 *Piper PA-161495 Semi-Scale Kits C02 Rubber Power 22Span *TayorcrSft1095 *StinSon voyager1095 *PC-6 Porler1095 Contest-Sport Kits * Hornet Embryo995 * Hornet P-301495 FitS F-30 & Pee Wee Rules Outdoor Peanut Scale Kits 13Span *Cub895 *Slinnon 125895 *Vagabond895 *Farman895 *Jode895 *Fike995 1/2 RIO Gas Electric Kits Fits Astro 035 Taylorcraft3995 Stinson 1253995 HARD TO FIND ITEMS Brown 002 Motors Accessories Over 20 Sizes Rubber Stripl Japanese Tissue Super Fine Balsa Sheets & Strips Add 10% Shipping Minimum Shipping CATALOG $200 164 Model Aviation KINGSWAY R/C HOBBY SUPPLY Spectahlzlng RIC Aircraft Supplies SS81 Rlchorond7139778141 Hounlon TX 77058us WATTS 18008217783 maj1or decalsOver85O Select *7-1/4 Scale & S Giant Scaie38Sheets 38Sheets 38Sheds *Propeller Decals WT onle 7 Sheels3sizeson ea ABCD___ .40 Size Markings or8Sheels FSiaes-12 * Nomenelalure 42 0SAEE*Leilers Numbers 11 Colors See coior eharl L * Flags American Uniled Kingdom Contetierale * Slats 11 Colors 9 Sizes plus Sheel 01 Assorted Sites * Trim Sheets 43/4 28 ii Colors See churl zz * Aircraft Markings84 Sets * Squadron Insignias174 SeIs DECALS3OO PRESSURE SENSITIVE R TRANSFER Authentic model insignias pressure sensrttne mater Iranster 1/4 scale 40 80 ntis stars flags tellers numhers trim r decals size propeller decals World War II kill mark sheelsuO$II NORTHEAST SCREEN GRAPHICS 21 FISHER AVE EAST LONGMEADOW MA 01028 TEL 413 528 4110 w- Write today catalogue w- We guarantee prices complete No hidden charges w- We pay shipping ship immediately $300 catalogue charge refundable first order $20 100 PARK AVENUE CARMECHAELS PA 15320 Skyvolt basically five- six-minute airplane flights falling much outside numbers generally experimental some way mean shorter longer flights may have included incomplete charges prop changes flights cruise power levels etc such atypical As refresher Senior simply scale-up Skyvolt January 1991 MA discussed some detail article weighs 85 oz has 600 sq area Motivation cobalt 40 direct Energy storage eighteen 1200 mAh SCRsThis plane best performer very capable aerobatic craft Indeed better flier am pilot have handed controls some Largest Supplier STERLING Control Line Kits Over 34 choose highly skilled pilots seen some things done done plane case plane flown lot differently Seniorita such flight profile decidedly different can refer March issue compare twoFor reference purposes unlike Seniorita Senior Skyvolt almost always flown through essentially continuous maneuvers play throttle flight long according need ie attempting conserve energy needed order make available needed feel results best overall flight possibleA maneuver set particularly like use promote Electric take off immediately roll inverted low ground climb through half loop roll inverted again hold attitude short distance finally pull inverted snapall within seconds takeoff sequence has convinced Electric disbelieverLike Senioritas Senior Skyvolts pack always time-charged using timer control several chargers have suppose peak charging would add some flight times presented dont care wait extra five minutes during charge just get few tens seconds air time After Im sport flierSo closes April column Please sure enclose SASE correspondence youd like reply Happy Electric Springtime Landings Everyone RC Soaring/Blakeslee Continued page 65 thermal Tall grass will serve good telltale wind direction Watch what other gliders doing sky flight characteristics can show whether sink lift strong lift may want join However too high above bubble may already detached could get caught too far away sufficient altitude make return trip landing zone Along same lines study pattern passing thermals watching gliders marking Pay attention location altitude time wind direction Under same conditions thermal generators usLially kick off thermals regular intervals known cycling information can increase odds continued page 168 k9 rn-k R/C Flight Simulator IBM PCs & Compatibles Excellent flight equations Superb graphics Easily set up fly like bird features aid learning Skylark realistic RIC flight simulator available todayl Visit booth Toledo Call Now 313 662-LARK 166 Model Aviation Flying ~The way meant thats beauty Control Line Planes want experience flying way meant way American pioneers like Charles Lindbergh flew FEEL airplane Control Line Planes ic9oA g has worlds largest selection control-line planes equipment including hard-to-find classics LATHESeLATHESOLATHESOLATHES ~SENO $100 1LJBLUEALETIU FOR pJo/uc4einvMeoLarnc COMPLETE CATALOG __CONTAINING 2-3538MANY FAMOUS cATALOG $100NAME LATHES PO Box 536-Ye Hurricane WV 25526 Airplane version coming soon
Edition: Model Aviation - 1992/04
Page Numbers: 62, 63, 160, 162, 164, 166
THIS month Electric Connection Service offers two new names connect First up Charles Moulton RR 1 Box 1920 Troy VA 22974 Charles tells new area anxious connect other local E-fliers Charles favors small Electrics interested kindsNext sort twist Model Aviations own Old-Timer Free flight columnist Bill Baker sent note offering help other Electrically oriented modelers area Bills personal Electric preference Soaring has broad-based interest evidenced photo December 91 column Electric Sunny bipe Feel free contact Bill 1902 Peter Pan Norman OK 73072 tell im Bob sent ya motor noise Joe Utazi head modeler JOMAR prompted December column subject motor noise provide related information ponder As refresher column discussed radio interference resulting very fast waveform edges switched motor voltage can associated ordinary speed control operationJoe wrote advise has recently incorporated carefully controlled .... 50 WII IMinutes DuratIon 62 Model Aviation Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 THIS MONTHS TOPICS 1 Electric Connection Service 2 Motor NoiseEven 3 Speed Controls Tidbits 4 EAASome Follow-up 5 US F3E Effort 6 Senior Skyvolt flight Profile Flightec SEC-Il speed control speced operate motors up 40 cobalts Bob Shipton Detroit holding 1700 sq neresnaw ig agiet UI U D Energy storage eighteen 1200s Motivation geared cobalt 40 turnIng Master Airscrew 14 x 6 Model actual size original Old-Timer 60 40 30 20 10 Dr Cohn McKinley Winston-Salem NC about set deBolt Bipe down takeoff Scene 1991 Labor Day VFRCS meet Selinsgrove PA Vintage affair brought out RCs fifties early sixtiesseveral electrified FOR INFORMATION CONTACT Show Directors RON STAHL 4521 Bellvieu Ave Baltimore MD 21215 410-664-2712 DAVE MITCHELL 410-668-6690 MARC SH MID ATLANTIC RADIO CONTROL JUNE 6 7 1992 Saturday 9 am 5 pm Sunday 10 am 4 pm MARYLAND STATE FAIR GROUNDS TIMONIUM MARYLAND Sponsored c RADIO CONTROL MODELERS BALTIMORE PADONIA RD TO FREDRICK TIMONIUM RD95 BALTIMORE BALTO WASH PKWYA TO WASHINGTONNORTH Over 100 Manufacurers Static Displays Swapshop Radio Kit & Equipment Raffle Door Prizes Free Parking 5000 Cars Refreshment Centers Indoor & Outdoor Demonstrations Factory Teams Aircraft Cars Boats Radios Engines Transmitter Testing 9000 Gallon Outdoor Boat Pond RIC Car Racing AS ALWAYS SELLING SHOW rise time MOSFET gates speed control products preclude particular kind potential interferenceHeres brief tutorial MOSFET used speed controls used switch apply motor battery voltage motor MOSFET three terminal device wherein three parts component source drain gate Normally several MOSFETS used parallel share motor current hurdenThink combined sources drains themselves switch source always wired motor battery negative drain wired motor terminal other motor terminal connected motor battery positive parallel gates can thought sort switch handle positive voltage applied gates parallel drainsource pairs conduct switch closes motor runs gate control voltage comes rest electronics speed control decodes received throttle signal like servo would faster control voltage applied gate faster switch closesThus drive waveform gate slowed down motor voltage switching also slower slower latter waveform less radiated interference present Keep Continued page 160 April 1992 63 SWAP SHOP $10 FULL TABLE PER DAY NO DEALERS PLEASE Limit 2 tables per person -SWAP SHOP ONLYFor Pre-Registration call WAYNE MELLOR 410-788-3742 evenings ieciric conversion OT iaewaters IIaymate 40 klt rendered John Hickey Hatfield PA Astro 40 geared cobalt eighteen 1200s JOMAR speed control Plane 5 314 lb up John eventually substituted dural formed gear wire version shown Beautiful Ford TnMotor L built Paul McEntarfer Waterford CT based RCM plans wet power Its 1112 scale 74-In span up 108 oz Electric Challenge R Charles Evans Clarcona FL charges motor pack solar rack control box bought lots solar flashlights stripped out goodies serleslparalleled solar cells Talk about flying freel THREADS Use sleeves material CA will bond Six sizes2 #4 #6 #8 #10 1/4 x 20 Perfect hatches cowls canopies engines servos landing gears wings anything mounts machine screw metal screw thread Uses depend imagination Color sleeve denotes size Can used thread lockers mind speed still order tens millionths secondPlease note switching speed related speed control switching rate latter either frame rate high rate latter terms describe often cycles per second battery voltage applied motor Frame rate usually about 50 times second High rate usually several thousand times per secondThe December 1989 column discussed relative merits both types think initiated demise frame rate controls model aircraft applications say because following appearance column frame rate AUL bUMW Ohio % 11376 Ridgeway Road Kensington OH 44427 controls seemed disappear market although such effect intent column offeringNow back track Carefully controlled just buzzword means something such thing having gate waveforms too slow leads inefficient speed control operation especially high rate controls summary motor drive waveform thats too fast may result radio interference thats too slow will likely result hot MOSFETSor worse Joes products optimized betweenJoe also tells has found powersystem-related interference can greater high resistance batteries has found cell types such SCEs .. somehow seem exacerbate noise situation. compared SCRs Ill admit Im sure understand coming Joea pioneer Electric speed control technologyI accept itIn same letter Joe also noted has recently upgraded popular SM series speed controls changing board FR4 material instead ceramic type new material crash resistant addition JOMAR B&P Associates Gives Total Flight Line FREEDOM battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire 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 has incorporated upgraded automotivetype regulator design tolerant line spikesIncidentally SM means surface mount refers parts Joe uses products leadless components simply surface-soldered place opposed leaded components soldered PC board holes results significant size reduction finished assemblies Several manufacturers now using surface mount technologyFinally Joe has asked Id pass along fact JOMAR has new address Its JOMAR 8606 Susanview Lane Cincinnati OH 45244 Tel 5 13/4740985 High rates cant help being amused some advertising Ive noticed lately seems recenfly manufacturers speed controls RC cars have caught merits high rate techniques now number such devices being offeredThe amusing part advertising continuing trend some RC car control suppliers trying out-spec competitors parameter seems used way speed control current rating Ive seen controls presented being capable handling 600 amps overkill say least Amusing though Heres whyConsider new Astro Zero Loss connectors discussed September 1991 column reported samples displayed contact resistance approximately 228 micro-ohms Thats Conunued page 162 160 Model Aviation ALL price $169 package B 216-223-1950 RC Electrics/Kopski Continued page 63 Obechi Large Sheets Please call 404 642-0645 send SASE #7 Creekpark Ct Roswdll GA 30076 its scak kits engines accessories want & want em now got emFrank Tiano .boat car kits hardto-find pans & anything need want.its stock Joe Manzella SHIPPED WITHIN 24 HRS 1387 N Military Trail West Palm Deach FL 3240 407-688-d3669 HOBBY SUPER IUKL Qj~ R/C GOODIES VL PRODUCTS FLITE SYSTEMS VL-111 SYSTEM MOTOR REDUCTION GEAR BOX 2 PROPS 852 BATrERY CHGE CQRD 32 GRAMS F-F MODELS TO 30 INCH SPAN 2495 VL-I11R SYSTEM SAME AS VL111 EXCEPT REMOTE BArr MOUNTING $2795 VL-102 SYSTEM F-F OR LITE R/C MODELS 2550 IN SPAN POWERFUL HYTORK MOTOR & GEARBOX PROP 3-CELL BATT SWITCH & CHGE CORD SYSTEM WEIGHT 71 GRAMS -$3295 MASTER AIRSCREW FEATURES COMPACT DESIGN HIGH QUALITY GEARS & BEARINGS THREE GEAR RATIOS AVAIL ABLE FOR ELECTRIC FLIGHT 25 30 351 SPECIFV FOR 05 ELECTRIC REG $1595 S&H $250 0000228 ohmsvery low resistance indeed Now consider 600 amps flowing through resistance cant imagine such current levels could possibly come lets pretend anyway associated connector power loss contact would PR 600 x 600 x 0000228 82 watts Thats 164 watts two-pin connector Instant meltdown see itAn amusing calculation would associated wire Lets assume power system installation uses foot #16 wire wire has resistance about 442 milliohms 000442 ohms per foot 600 amps flowing voltage loss wire alone would x R 600 x 000442about 27 volts associated power loss would MINI ELECTRIC SYSTEMS AND ELECTRIC GEAR BOXES HILINE PRODUCTS FLITE SYSTEM$ MINI-B F-F SYSTEM 6W MOTOR SW HARNESS PROP 3 X 100 NICADS FOR MODELS 3-5 OZ. 100-150 SOIN WING AREA -47 GRAMS $2995 IMP-30 F-F OR SMALL R/C TO 10 OZ & 150 SO IN SYSTEM WITH 30 WATT MOTOR 5 X 3 PROP SWITCH HARNESS 3 275 MA NICADS SYSTEM WEIGHT 115 GRAMS 3095 W/MOTORR/C PLANES 6 X 4 PROP SWITCH250-300 HARNESS4 X 800 NICADS5Q IN WEIGHT 230 GRAMS$4595 ADD $450 S & H FOR ANY SYSTEM IN THIS AD COMPLETE BROCHURE GIVES DETAILS ON ALL ABOVE UNITS AS WELL AS ALL ASTRO FLIGHT SYSTEMS & ACCESSORIES AVAILABLE FROM CHARLIES R/C GOODIES voltage times current producing 27 x 600 watts wire molten metal Sometimes think car guys have flights fancy aeromodelersMaybe Im missing something sort hype seems like just that dont see merit such seemingly ridiculous speed control rating Its sort like installing thumb tack sledge hammerOn other hand since readily admit knowing everything someone can enlighten regarding merits such specifications Id happy add knowledge bank share readers column future Meanwhile Im suggesting readers swayed such offerings seemingly excessive example aboveNow something substantive Recently reader advised problem experienced using RCD receiver Flightec speed control According reader Charles Evans RCD output pulse voltage just about three volts u QUALITY FIBERGLASS FRENCH TR-260 1* Four-StrokeEngine KITS IU 416 587-3610I TR-260I SPAN 71 AREAB58sq ENG 90-120 4 CYCLE si~S WT APPROX 7585 LB-w k1T FEATURES3 $18499 USLIGHTWEIGHT FIBERGLASS FUSELAGE COWL CANOPY AND U ORDER BY PHONE 7 DAYS WEEKWHEEL PANTS BALSA COVERED FOAM WING WITH LE-TE IN PLACEAND SANDED SELECTED BALSA 416 5204192CUT STAB RUDDER ELEVATORS & AILERONS T6 ALUMINUM ADD $1500 postageLANDING GEARS HARDWARE AND INSTRUCTIONSInfo $200g QUADROTECH Fax 416 283-6538 low 2 weeks delnery 3148 KINGSTON RD STE 202 BOX 158 SCARBOROUGH ONT MiM 1P4 CANADA ghtec control needs operate Charles wound up using interface buffer circuit convert receiver output higher voltage swing now wellUpon receipt letter pulled RCD Senior Skyvolt sure enough servo drive pulses just little over three volts Now happens plane has Horak control pulled see just what input signal necessary run itI have servo tester good speed controls too has adjustable output level control Using found particular speed control operates below volt input clearly particular receiver/speed control combo very workable other hand also have receivers output three volts other speed controls dont know necessary input pulse minimum amplitude guess Ive just managed avoid incompatible combinations up now paying attention possibility such potential problems 1 hope clear information offered critique products particular rather note some incompatible combinations products occur Specifically neither named product above individually deficientI know lots folks very successfully using both products mentioned other combinationswith no problems am fact can see could mix varied manufacturers receivers Continued page 164 STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CIJVTING PLASTIC WOOD SOFT MEFALS LEXAN PLEXIGLASS & ETC AVAILABLE IN 006000 010 012 014 LI016 018 020 023 025 DLAMETER @ $075 EA 1 OUTSIDE032 THICKNESS NO 5 R $800 NO 503PXO14X1I4SAW$6OO OUR SAWS ONLY WORK WFFH OUR ARBOR MICRO 5ELF5TARTING TORCH No need flint matches Just press Piezo SeIf-Startisg button mcrn srze adjustable flame fhat burns 2370 uy 3 hours Operates us standard cigarette lighter butane refillable Task fits comfortably patm hand made high-impact rubber allows safe non stip comfortabte grip Supplied can butane MT775 Blow Torch$3500 IwilS nan MT77S Butane S oz$600 EASTERN TOOL& SUPPLY CO 149 GRAND ST NYC NY 10013 WRRE FOR CATALOG$300 ORDERS 212-925-1000 WHEN ORDERING PPD ADD $300 OFFICE 212-226-3749 CODADD$500 FAX212-925-1010 162 Model Aviation 4 KK Cash Prices Bold Type Add 6% Charge Cards Minimum Charge $2500 No CODs 20% Deposit Add Sales Tax Sales California Catalog $100 USA $300 Foreign 2828 Cochran St SuIte 281 V 3065 80552791148055B1 5061 alley Rubber & Engine Power Free FlIght Diepley Control Une Electric Power RJC Airplanes new Illustrated 32 page tabloId sIze catalog US ft Canada $100 Foreigh $300 Penn Valley Hobby Center B37-AW Main Se Lanedale PA 19440 215- 368-0770 FULLR PM 55 CHUCK$1 895 DREMEL 850395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCI p ULTRAFET CONTROLLER 111011 RATE motor controller $8995 8200 liz switching frequency Active Gate Drive Conleolind Rise Time cJrcuiby pravide linear response smooth acceleration higher efficiency lens motor heating other units ft 12 cell operation 18 volts maximum SMART SWITCII kMOSFET motor switch $4995 soft-start circuit reduces motor model torque stress during power up ft 10 cell operation 115 volts matimumi common features shared ULIIIAI1ET COUROLLER & SMART SWITCH Only highest current lowest on-resistance MOSIETs available have utilized lJltruFet Controller Smart Switch have continuous current rating 240 amps 100015 ohms 120 amps 0003 ohms respectively heatsink may required high motor currents and/or estendeci ran times Smart Switchs current capahility may increased 180 amps 0002 ohms 240 amps 1000 15 Ohms larger motors and/or higher performance additional $10 $20 respectively ispecify ordering nattery Eliminator Circuit defeatabie allows nirad pack power both motor receiver Low Voltage Cutoff defeatahie uses low dropout regulator shuts down motor hattery reaches ft volts allows longer motor rans compared Other systems AC DC hysteresis techniques am employed such motor turns off shatryly cutoff voltage prevent motor 1mm coming hack battery voltage rises Will work AM IM PCM radios Auto Turn Off shuts down motor receiver signal lost An Input Isolation nuffer prevents erratic motor control due sticky high current servos staff-up glitch tilter prevents motor fmm reining power up Unit shipped tinned leads Also availahie Futaha connector 8700 additional KK rumrrvwu,unu VATIVE ELECTRONICS L4L~iIYuJ1II OT DESIGN 304 Eon SouL Hodeos flese lt.epObleu 03051 603-882-6022 servos could run similar incompatibilities offering made sole purpose advising such possibilitiesFrom above have new installation brand receiver brand B speed control combo doesnt work check possible incompatibility before fall prey believing did something wrong start rewiring everything Thanks sharing experience us Charlcs EAA February issue described what appeared to nobody home situation EAAthis virtue own several letters checks bringing no response recent telephone conversation Steve Neu Prepaid Orders Money Order CurStied Chuck Shipping 8 Handling $000 COO Orders Cash Ceitilied Check collected delivery Add Sd 00 above amounts PACIORY DIRECF ONLY prices Specifications am Suhiect Change Without Notice Designed Manufactured USA US F3E Team fame learned situation EAA related few interested folks trying work being able alone forever Some have just given upI understand Ive seen kind situation both modeling other aspects life well Indeed clubs characterized having 10% active core seems everything rest roster aside offering occasional criticisms whats going otherwise just flies freeOften members active core simply give up Anyway understand EAA now bit standstill some discussion revitalization future So like have written and/or sent dues money EAA past have no response part least explanation Stay tuned.. Speaking Steve Neu Id like pass along some thoughts time regarding US F3E its efforts first met Steve 1991 KRC meet dazzled everyone spectacular performance F3E machines So impressed officers members KRC club voted send donation support Team effortan action beyond scope 1991 club budgetNow Im well aware average readers column largely sport fliers little no competitive interest too must admit perceive US F3E effort worthy Electric cause its own right Im suggesting also might want consider lending some support either individual clubI have offered Steve some column space can fully describe F3E activity way Im hoping help muster broad-based support team scheduled compete August 1992 So again stay tuned.. Senior Skyvolt flight profile follows Last months column included similar presentation Electrified Seniorita got idea another graph totally different plane might interest Seniorita Senior Skyvolt two planes Ive flying recentlyThe plot time chart shown column characterizes 259 flights big Skyvolt including some pilots other myself As shown flight time presented 15-second increments clear histogram Senior Confinued page 166 Box 1063 Lorain Ohio 44055 MICRA Phone 216 282-8354 PA 16 Clipper Taylororaft U Horn A4 an Mosquto Big Flying Scale Kits Over Two Foot Span *Piper Cub1495 *Slinson 1251495 *Piper PA-161495 Semi-Scale Kits C02 Rubber Power 22Span *TayorcrSft1095 *StinSon voyager1095 *PC-6 Porler1095 Contest-Sport Kits * Hornet Embryo995 * Hornet P-301495 FitS F-30 & Pee Wee Rules Outdoor Peanut Scale Kits 13Span *Cub895 *Slinnon 125895 *Vagabond895 *Farman895 *Jode895 *Fike995 1/2 RIO Gas Electric Kits Fits Astro 035 Taylorcraft3995 Stinson 1253995 HARD TO FIND ITEMS Brown 002 Motors Accessories Over 20 Sizes Rubber Stripl Japanese Tissue Super Fine Balsa Sheets & Strips Add 10% Shipping Minimum Shipping CATALOG $200 164 Model Aviation KINGSWAY R/C HOBBY SUPPLY Spectahlzlng RIC Aircraft Supplies SS81 Rlchorond7139778141 Hounlon TX 77058us WATTS 18008217783 maj1or decalsOver85O Select *7-1/4 Scale & S Giant Scaie38Sheets 38Sheets 38Sheds *Propeller Decals WT onle 7 Sheels3sizeson ea ABCD___ .40 Size Markings or8Sheels FSiaes-12 * Nomenelalure 42 0SAEE*Leilers Numbers 11 Colors See coior eharl L * Flags American Uniled Kingdom Contetierale * Slats 11 Colors 9 Sizes plus Sheel 01 Assorted Sites * Trim Sheets 43/4 28 ii Colors See churl zz * Aircraft Markings84 Sets * Squadron Insignias174 SeIs DECALS3OO PRESSURE SENSITIVE R TRANSFER Authentic model insignias pressure sensrttne mater Iranster 1/4 scale 40 80 ntis stars flags tellers numhers trim r decals size propeller decals World War II kill mark sheelsuO$II NORTHEAST SCREEN GRAPHICS 21 FISHER AVE EAST LONGMEADOW MA 01028 TEL 413 528 4110 w- Write today catalogue w- We guarantee prices complete No hidden charges w- We pay shipping ship immediately $300 catalogue charge refundable first order $20 100 PARK AVENUE CARMECHAELS PA 15320 Skyvolt basically five- six-minute airplane flights falling much outside numbers generally experimental some way mean shorter longer flights may have included incomplete charges prop changes flights cruise power levels etc such atypical As refresher Senior simply scale-up Skyvolt January 1991 MA discussed some detail article weighs 85 oz has 600 sq area Motivation cobalt 40 direct Energy storage eighteen 1200 mAh SCRsThis plane best performer very capable aerobatic craft Indeed better flier am pilot have handed controls some Largest Supplier STERLING Control Line Kits Over 34 choose highly skilled pilots seen some things done done plane case plane flown lot differently Seniorita such flight profile decidedly different can refer March issue compare twoFor reference purposes unlike Seniorita Senior Skyvolt almost always flown through essentially continuous maneuvers play throttle flight long according need ie attempting conserve energy needed order make available needed feel results best overall flight possibleA maneuver set particularly like use promote Electric take off immediately roll inverted low ground climb through half loop roll inverted again hold attitude short distance finally pull inverted snapall within seconds takeoff sequence has convinced Electric disbelieverLike Senioritas Senior Skyvolts pack always time-charged using timer control several chargers have suppose peak charging would add some flight times presented dont care wait extra five minutes during charge just get few tens seconds air time After Im sport flierSo closes April column Please sure enclose SASE correspondence youd like reply Happy Electric Springtime Landings Everyone RC Soaring/Blakeslee Continued page 65 thermal Tall grass will serve good telltale wind direction Watch what other gliders doing sky flight characteristics can show whether sink lift strong lift may want join However too high above bubble may already detached could get caught too far away sufficient altitude make return trip landing zone Along same lines study pattern passing thermals watching gliders marking Pay attention location altitude time wind direction Under same conditions thermal generators usLially kick off thermals regular intervals known cycling information can increase odds continued page 168 k9 rn-k R/C Flight Simulator IBM PCs & Compatibles Excellent flight equations Superb graphics Easily set up fly like bird features aid learning Skylark realistic RIC flight simulator available todayl Visit booth Toledo Call Now 313 662-LARK 166 Model Aviation Flying ~The way meant thats beauty Control Line Planes want experience flying way meant way American pioneers like Charles Lindbergh flew FEEL airplane Control Line Planes ic9oA g has worlds largest selection control-line planes equipment including hard-to-find classics LATHESeLATHESOLATHESOLATHES ~SENO $100 1LJBLUEALETIU FOR pJo/uc4einvMeoLarnc COMPLETE CATALOG __CONTAINING 2-3538MANY FAMOUS cATALOG $100NAME LATHES PO Box 536-Ye Hurricane WV 25526 Airplane version coming soon
Edition: Model Aviation - 1992/04
Page Numbers: 62, 63, 160, 162, 164, 166
THIS month Electric Connection Service offers two new names connect First up Charles Moulton RR 1 Box 1920 Troy VA 22974 Charles tells new area anxious connect other local E-fliers Charles favors small Electrics interested kindsNext sort twist Model Aviations own Old-Timer Free flight columnist Bill Baker sent note offering help other Electrically oriented modelers area Bills personal Electric preference Soaring has broad-based interest evidenced photo December 91 column Electric Sunny bipe Feel free contact Bill 1902 Peter Pan Norman OK 73072 tell im Bob sent ya motor noise Joe Utazi head modeler JOMAR prompted December column subject motor noise provide related information ponder As refresher column discussed radio interference resulting very fast waveform edges switched motor voltage can associated ordinary speed control operationJoe wrote advise has recently incorporated carefully controlled .... 50 WII IMinutes DuratIon 62 Model Aviation Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 THIS MONTHS TOPICS 1 Electric Connection Service 2 Motor NoiseEven 3 Speed Controls Tidbits 4 EAASome Follow-up 5 US F3E Effort 6 Senior Skyvolt flight Profile Flightec SEC-Il speed control speced operate motors up 40 cobalts Bob Shipton Detroit holding 1700 sq neresnaw ig agiet UI U D Energy storage eighteen 1200s Motivation geared cobalt 40 turnIng Master Airscrew 14 x 6 Model actual size original Old-Timer 60 40 30 20 10 Dr Cohn McKinley Winston-Salem NC about set deBolt Bipe down takeoff Scene 1991 Labor Day VFRCS meet Selinsgrove PA Vintage affair brought out RCs fifties early sixtiesseveral electrified FOR INFORMATION CONTACT Show Directors RON STAHL 4521 Bellvieu Ave Baltimore MD 21215 410-664-2712 DAVE MITCHELL 410-668-6690 MARC SH MID ATLANTIC RADIO CONTROL JUNE 6 7 1992 Saturday 9 am 5 pm Sunday 10 am 4 pm MARYLAND STATE FAIR GROUNDS TIMONIUM MARYLAND Sponsored c RADIO CONTROL MODELERS BALTIMORE PADONIA RD TO FREDRICK TIMONIUM RD95 BALTIMORE BALTO WASH PKWYA TO WASHINGTONNORTH Over 100 Manufacurers Static Displays Swapshop Radio Kit & Equipment Raffle Door Prizes Free Parking 5000 Cars Refreshment Centers Indoor & Outdoor Demonstrations Factory Teams Aircraft Cars Boats Radios Engines Transmitter Testing 9000 Gallon Outdoor Boat Pond RIC Car Racing AS ALWAYS SELLING SHOW rise time MOSFET gates speed control products preclude particular kind potential interferenceHeres brief tutorial MOSFET used speed controls used switch apply motor battery voltage motor MOSFET three terminal device wherein three parts component source drain gate Normally several MOSFETS used parallel share motor current hurdenThink combined sources drains themselves switch source always wired motor battery negative drain wired motor terminal other motor terminal connected motor battery positive parallel gates can thought sort switch handle positive voltage applied gates parallel drainsource pairs conduct switch closes motor runs gate control voltage comes rest electronics speed control decodes received throttle signal like servo would faster control voltage applied gate faster switch closesThus drive waveform gate slowed down motor voltage switching also slower slower latter waveform less radiated interference present Keep Continued page 160 April 1992 63 SWAP SHOP $10 FULL TABLE PER DAY NO DEALERS PLEASE Limit 2 tables per person -SWAP SHOP ONLYFor Pre-Registration call WAYNE MELLOR 410-788-3742 evenings ieciric conversion OT iaewaters IIaymate 40 klt rendered John Hickey Hatfield PA Astro 40 geared cobalt eighteen 1200s JOMAR speed control Plane 5 314 lb up John eventually substituted dural formed gear wire version shown Beautiful Ford TnMotor L built Paul McEntarfer Waterford CT based RCM plans wet power Its 1112 scale 74-In span up 108 oz Electric Challenge R Charles Evans Clarcona FL charges motor pack solar rack control box bought lots solar flashlights stripped out goodies serleslparalleled solar cells Talk about flying freel THREADS Use sleeves material CA will bond Six sizes2 #4 #6 #8 #10 1/4 x 20 Perfect hatches cowls canopies engines servos landing gears wings anything mounts machine screw metal screw thread Uses depend imagination Color sleeve denotes size Can used thread lockers mind speed still order tens millionths secondPlease note switching speed related speed control switching rate latter either frame rate high rate latter terms describe often cycles per second battery voltage applied motor Frame rate usually about 50 times second High rate usually several thousand times per secondThe December 1989 column discussed relative merits both types think initiated demise frame rate controls model aircraft applications say because following appearance column frame rate AUL bUMW Ohio % 11376 Ridgeway Road Kensington OH 44427 controls seemed disappear market although such effect intent column offeringNow back track Carefully controlled just buzzword means something such thing having gate waveforms too slow leads inefficient speed control operation especially high rate controls summary motor drive waveform thats too fast may result radio interference thats too slow will likely result hot MOSFETSor worse Joes products optimized betweenJoe also tells has found powersystem-related interference can greater high resistance batteries has found cell types such SCEs .. somehow seem exacerbate noise situation. compared SCRs Ill admit Im sure understand coming Joea pioneer Electric speed control technologyI accept itIn same letter Joe also noted has recently upgraded popular SM series speed controls changing board FR4 material instead ceramic type new material crash resistant addition JOMAR B&P Associates Gives Total Flight Line FREEDOM battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire 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 has incorporated upgraded automotivetype regulator design tolerant line spikesIncidentally SM means surface mount refers parts Joe uses products leadless components simply surface-soldered place opposed leaded components soldered PC board holes results significant size reduction finished assemblies Several manufacturers now using surface mount technologyFinally Joe has asked Id pass along fact JOMAR has new address Its JOMAR 8606 Susanview Lane Cincinnati OH 45244 Tel 5 13/4740985 High rates cant help being amused some advertising Ive noticed lately seems recenfly manufacturers speed controls RC cars have caught merits high rate techniques now number such devices being offeredThe amusing part advertising continuing trend some RC car control suppliers trying out-spec competitors parameter seems used way speed control current rating Ive seen controls presented being capable handling 600 amps overkill say least Amusing though Heres whyConsider new Astro Zero Loss connectors discussed September 1991 column reported samples displayed contact resistance approximately 228 micro-ohms Thats Conunued page 162 160 Model Aviation ALL price $169 package B 216-223-1950 RC Electrics/Kopski Continued page 63 Obechi Large Sheets Please call 404 642-0645 send SASE #7 Creekpark Ct Roswdll GA 30076 its scak kits engines accessories want & want em now got emFrank Tiano .boat car kits hardto-find pans & anything need want.its stock Joe Manzella SHIPPED WITHIN 24 HRS 1387 N Military Trail West Palm Deach FL 3240 407-688-d3669 HOBBY SUPER IUKL Qj~ R/C GOODIES VL PRODUCTS FLITE SYSTEMS VL-111 SYSTEM MOTOR REDUCTION GEAR BOX 2 PROPS 852 BATrERY CHGE CQRD 32 GRAMS F-F MODELS TO 30 INCH SPAN 2495 VL-I11R SYSTEM SAME AS VL111 EXCEPT REMOTE BArr MOUNTING $2795 VL-102 SYSTEM F-F OR LITE R/C MODELS 2550 IN SPAN POWERFUL HYTORK MOTOR & GEARBOX PROP 3-CELL BATT SWITCH & CHGE CORD SYSTEM WEIGHT 71 GRAMS -$3295 MASTER AIRSCREW FEATURES COMPACT DESIGN HIGH QUALITY GEARS & BEARINGS THREE GEAR RATIOS AVAIL ABLE FOR ELECTRIC FLIGHT 25 30 351 SPECIFV FOR 05 ELECTRIC REG $1595 S&H $250 0000228 ohmsvery low resistance indeed Now consider 600 amps flowing through resistance cant imagine such current levels could possibly come lets pretend anyway associated connector power loss contact would PR 600 x 600 x 0000228 82 watts Thats 164 watts two-pin connector Instant meltdown see itAn amusing calculation would associated wire Lets assume power system installation uses foot #16 wire wire has resistance about 442 milliohms 000442 ohms per foot 600 amps flowing voltage loss wire alone would x R 600 x 000442about 27 volts associated power loss would MINI ELECTRIC SYSTEMS AND ELECTRIC GEAR BOXES HILINE PRODUCTS FLITE SYSTEM$ MINI-B F-F SYSTEM 6W MOTOR SW HARNESS PROP 3 X 100 NICADS FOR MODELS 3-5 OZ. 100-150 SOIN WING AREA -47 GRAMS $2995 IMP-30 F-F OR SMALL R/C TO 10 OZ & 150 SO IN SYSTEM WITH 30 WATT MOTOR 5 X 3 PROP SWITCH HARNESS 3 275 MA NICADS SYSTEM WEIGHT 115 GRAMS 3095 W/MOTORR/C PLANES 6 X 4 PROP SWITCH250-300 HARNESS4 X 800 NICADS5Q IN WEIGHT 230 GRAMS$4595 ADD $450 S & H FOR ANY SYSTEM IN THIS AD COMPLETE BROCHURE GIVES DETAILS ON ALL ABOVE UNITS AS WELL AS ALL ASTRO FLIGHT SYSTEMS & ACCESSORIES AVAILABLE FROM CHARLIES R/C GOODIES voltage times current producing 27 x 600 watts wire molten metal Sometimes think car guys have flights fancy aeromodelersMaybe Im missing something sort hype seems like just that dont see merit such seemingly ridiculous speed control rating Its sort like installing thumb tack sledge hammerOn other hand since readily admit knowing everything someone can enlighten regarding merits such specifications Id happy add knowledge bank share readers column future Meanwhile Im suggesting readers swayed such offerings seemingly excessive example aboveNow something substantive Recently reader advised problem experienced using RCD receiver Flightec speed control According reader Charles Evans RCD output pulse voltage just about three volts u QUALITY FIBERGLASS FRENCH TR-260 1* Four-StrokeEngine KITS IU 416 587-3610I TR-260I SPAN 71 AREAB58sq ENG 90-120 4 CYCLE si~S WT APPROX 7585 LB-w k1T FEATURES3 $18499 USLIGHTWEIGHT FIBERGLASS FUSELAGE COWL CANOPY AND U ORDER BY PHONE 7 DAYS WEEKWHEEL PANTS BALSA COVERED FOAM WING WITH LE-TE IN PLACEAND SANDED SELECTED BALSA 416 5204192CUT STAB RUDDER ELEVATORS & AILERONS T6 ALUMINUM ADD $1500 postageLANDING GEARS HARDWARE AND INSTRUCTIONSInfo $200g QUADROTECH Fax 416 283-6538 low 2 weeks delnery 3148 KINGSTON RD STE 202 BOX 158 SCARBOROUGH ONT MiM 1P4 CANADA ghtec control needs operate Charles wound up using interface buffer circuit convert receiver output higher voltage swing now wellUpon receipt letter pulled RCD Senior Skyvolt sure enough servo drive pulses just little over three volts Now happens plane has Horak control pulled see just what input signal necessary run itI have servo tester good speed controls too has adjustable output level control Using found particular speed control operates below volt input clearly particular receiver/speed control combo very workable other hand also have receivers output three volts other speed controls dont know necessary input pulse minimum amplitude guess Ive just managed avoid incompatible combinations up now paying attention possibility such potential problems 1 hope clear information offered critique products particular rather note some incompatible combinations products occur Specifically neither named product above individually deficientI know lots folks very successfully using both products mentioned other combinationswith no problems am fact can see could mix varied manufacturers receivers Continued page 164 STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CIJVTING PLASTIC WOOD SOFT MEFALS LEXAN PLEXIGLASS & ETC AVAILABLE IN 006000 010 012 014 LI016 018 020 023 025 DLAMETER @ $075 EA 1 OUTSIDE032 THICKNESS NO 5 R $800 NO 503PXO14X1I4SAW$6OO OUR SAWS ONLY WORK WFFH OUR ARBOR MICRO 5ELF5TARTING TORCH No need flint matches Just press Piezo SeIf-Startisg button mcrn srze adjustable flame fhat burns 2370 uy 3 hours Operates us standard cigarette lighter butane refillable Task fits comfortably patm hand made high-impact rubber allows safe non stip comfortabte grip Supplied can butane MT775 Blow Torch$3500 IwilS nan MT77S Butane S oz$600 EASTERN TOOL& SUPPLY CO 149 GRAND ST NYC NY 10013 WRRE FOR CATALOG$300 ORDERS 212-925-1000 WHEN ORDERING PPD ADD $300 OFFICE 212-226-3749 CODADD$500 FAX212-925-1010 162 Model Aviation 4 KK Cash Prices Bold Type Add 6% Charge Cards Minimum Charge $2500 No CODs 20% Deposit Add Sales Tax Sales California Catalog $100 USA $300 Foreign 2828 Cochran St SuIte 281 V 3065 80552791148055B1 5061 alley Rubber & Engine Power Free FlIght Diepley Control Une Electric Power RJC Airplanes new Illustrated 32 page tabloId sIze catalog US ft Canada $100 Foreigh $300 Penn Valley Hobby Center B37-AW Main Se Lanedale PA 19440 215- 368-0770 FULLR PM 55 CHUCK$1 895 DREMEL 850395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCI p ULTRAFET CONTROLLER 111011 RATE motor controller $8995 8200 liz switching frequency Active Gate Drive Conleolind Rise Time cJrcuiby pravide linear response smooth acceleration higher efficiency lens motor heating other units ft 12 cell operation 18 volts maximum SMART SWITCII kMOSFET motor switch $4995 soft-start circuit reduces motor model torque stress during power up ft 10 cell operation 115 volts matimumi common features shared ULIIIAI1ET COUROLLER & SMART SWITCH Only highest current lowest on-resistance MOSIETs available have utilized lJltruFet Controller Smart Switch have continuous current rating 240 amps 100015 ohms 120 amps 0003 ohms respectively heatsink may required high motor currents and/or estendeci ran times Smart Switchs current capahility may increased 180 amps 0002 ohms 240 amps 1000 15 Ohms larger motors and/or higher performance additional $10 $20 respectively ispecify ordering nattery Eliminator Circuit defeatabie allows nirad pack power both motor receiver Low Voltage Cutoff defeatahie uses low dropout regulator shuts down motor hattery reaches ft volts allows longer motor rans compared Other systems AC DC hysteresis techniques am employed such motor turns off shatryly cutoff voltage prevent motor 1mm coming hack battery voltage rises Will work AM IM PCM radios Auto Turn Off shuts down motor receiver signal lost An Input Isolation nuffer prevents erratic motor control due sticky high current servos staff-up glitch tilter prevents motor fmm reining power up Unit shipped tinned leads Also availahie Futaha connector 8700 additional KK rumrrvwu,unu VATIVE ELECTRONICS L4L~iIYuJ1II OT DESIGN 304 Eon SouL Hodeos flese lt.epObleu 03051 603-882-6022 servos could run similar incompatibilities offering made sole purpose advising such possibilitiesFrom above have new installation brand receiver brand B speed control combo doesnt work check possible incompatibility before fall prey believing did something wrong start rewiring everything Thanks sharing experience us Charlcs EAA February issue described what appeared to nobody home situation EAAthis virtue own several letters checks bringing no response recent telephone conversation Steve Neu Prepaid Orders Money Order CurStied Chuck Shipping 8 Handling $000 COO Orders Cash Ceitilied Check collected delivery Add Sd 00 above amounts PACIORY DIRECF ONLY prices Specifications am Suhiect Change Without Notice Designed Manufactured USA US F3E Team fame learned situation EAA related few interested folks trying work being able alone forever Some have just given upI understand Ive seen kind situation both modeling other aspects life well Indeed clubs characterized having 10% active core seems everything rest roster aside offering occasional criticisms whats going otherwise just flies freeOften members active core simply give up Anyway understand EAA now bit standstill some discussion revitalization future So like have written and/or sent dues money EAA past have no response part least explanation Stay tuned.. Speaking Steve Neu Id like pass along some thoughts time regarding US F3E its efforts first met Steve 1991 KRC meet dazzled everyone spectacular performance F3E machines So impressed officers members KRC club voted send donation support Team effortan action beyond scope 1991 club budgetNow Im well aware average readers column largely sport fliers little no competitive interest too must admit perceive US F3E effort worthy Electric cause its own right Im suggesting also might want consider lending some support either individual clubI have offered Steve some column space can fully describe F3E activity way Im hoping help muster broad-based support team scheduled compete August 1992 So again stay tuned.. Senior Skyvolt flight profile follows Last months column included similar presentation Electrified Seniorita got idea another graph totally different plane might interest Seniorita Senior Skyvolt two planes Ive flying recentlyThe plot time chart shown column characterizes 259 flights big Skyvolt including some pilots other myself As shown flight time presented 15-second increments clear histogram Senior Confinued page 166 Box 1063 Lorain Ohio 44055 MICRA Phone 216 282-8354 PA 16 Clipper Taylororaft U Horn A4 an Mosquto Big Flying Scale Kits Over Two Foot Span *Piper Cub1495 *Slinson 1251495 *Piper PA-161495 Semi-Scale Kits C02 Rubber Power 22Span *TayorcrSft1095 *StinSon voyager1095 *PC-6 Porler1095 Contest-Sport Kits * Hornet Embryo995 * Hornet P-301495 FitS F-30 & Pee Wee Rules Outdoor Peanut Scale Kits 13Span *Cub895 *Slinnon 125895 *Vagabond895 *Farman895 *Jode895 *Fike995 1/2 RIO Gas Electric Kits Fits Astro 035 Taylorcraft3995 Stinson 1253995 HARD TO FIND ITEMS Brown 002 Motors Accessories Over 20 Sizes Rubber Stripl Japanese Tissue Super Fine Balsa Sheets & Strips Add 10% Shipping Minimum Shipping CATALOG $200 164 Model Aviation KINGSWAY R/C HOBBY SUPPLY Spectahlzlng RIC Aircraft Supplies SS81 Rlchorond7139778141 Hounlon TX 77058us WATTS 18008217783 maj1or decalsOver85O Select *7-1/4 Scale & S Giant Scaie38Sheets 38Sheets 38Sheds *Propeller Decals WT onle 7 Sheels3sizeson ea ABCD___ .40 Size Markings or8Sheels FSiaes-12 * Nomenelalure 42 0SAEE*Leilers Numbers 11 Colors See coior eharl L * Flags American Uniled Kingdom Contetierale * Slats 11 Colors 9 Sizes plus Sheel 01 Assorted Sites * Trim Sheets 43/4 28 ii Colors See churl zz * Aircraft Markings84 Sets * Squadron Insignias174 SeIs DECALS3OO PRESSURE SENSITIVE R TRANSFER Authentic model insignias pressure sensrttne mater Iranster 1/4 scale 40 80 ntis stars flags tellers numhers trim r decals size propeller decals World War II kill mark sheelsuO$II NORTHEAST SCREEN GRAPHICS 21 FISHER AVE EAST LONGMEADOW MA 01028 TEL 413 528 4110 w- Write today catalogue w- We guarantee prices complete No hidden charges w- We pay shipping ship immediately $300 catalogue charge refundable first order $20 100 PARK AVENUE CARMECHAELS PA 15320 Skyvolt basically five- six-minute airplane flights falling much outside numbers generally experimental some way mean shorter longer flights may have included incomplete charges prop changes flights cruise power levels etc such atypical As refresher Senior simply scale-up Skyvolt January 1991 MA discussed some detail article weighs 85 oz has 600 sq area Motivation cobalt 40 direct Energy storage eighteen 1200 mAh SCRsThis plane best performer very capable aerobatic craft Indeed better flier am pilot have handed controls some Largest Supplier STERLING Control Line Kits Over 34 choose highly skilled pilots seen some things done done plane case plane flown lot differently Seniorita such flight profile decidedly different can refer March issue compare twoFor reference purposes unlike Seniorita Senior Skyvolt almost always flown through essentially continuous maneuvers play throttle flight long according need ie attempting conserve energy needed order make available needed feel results best overall flight possibleA maneuver set particularly like use promote Electric take off immediately roll inverted low ground climb through half loop roll inverted again hold attitude short distance finally pull inverted snapall within seconds takeoff sequence has convinced Electric disbelieverLike Senioritas Senior Skyvolts pack always time-charged using timer control several chargers have suppose peak charging would add some flight times presented dont care wait extra five minutes during charge just get few tens seconds air time After Im sport flierSo closes April column Please sure enclose SASE correspondence youd like reply Happy Electric Springtime Landings Everyone RC Soaring/Blakeslee Continued page 65 thermal Tall grass will serve good telltale wind direction Watch what other gliders doing sky flight characteristics can show whether sink lift strong lift may want join However too high above bubble may already detached could get caught too far away sufficient altitude make return trip landing zone Along same lines study pattern passing thermals watching gliders marking Pay attention location altitude time wind direction Under same conditions thermal generators usLially kick off thermals regular intervals known cycling information can increase odds continued page 168 k9 rn-k R/C Flight Simulator IBM PCs & Compatibles Excellent flight equations Superb graphics Easily set up fly like bird features aid learning Skylark realistic RIC flight simulator available todayl Visit booth Toledo Call Now 313 662-LARK 166 Model Aviation Flying ~The way meant thats beauty Control Line Planes want experience flying way meant way American pioneers like Charles Lindbergh flew FEEL airplane Control Line Planes ic9oA g has worlds largest selection control-line planes equipment including hard-to-find classics LATHESeLATHESOLATHESOLATHES ~SENO $100 1LJBLUEALETIU FOR pJo/uc4einvMeoLarnc COMPLETE CATALOG __CONTAINING 2-3538MANY FAMOUS cATALOG $100NAME LATHES PO Box 536-Ye Hurricane WV 25526 Airplane version coming soon
Edition: Model Aviation - 1992/04
Page Numbers: 62, 63, 160, 162, 164, 166
THIS month Electric Connection Service offers two new names connect First up Charles Moulton RR 1 Box 1920 Troy VA 22974 Charles tells new area anxious connect other local E-fliers Charles favors small Electrics interested kindsNext sort twist Model Aviations own Old-Timer Free flight columnist Bill Baker sent note offering help other Electrically oriented modelers area Bills personal Electric preference Soaring has broad-based interest evidenced photo December 91 column Electric Sunny bipe Feel free contact Bill 1902 Peter Pan Norman OK 73072 tell im Bob sent ya motor noise Joe Utazi head modeler JOMAR prompted December column subject motor noise provide related information ponder As refresher column discussed radio interference resulting very fast waveform edges switched motor voltage can associated ordinary speed control operationJoe wrote advise has recently incorporated carefully controlled .... 50 WII IMinutes DuratIon 62 Model Aviation Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 THIS MONTHS TOPICS 1 Electric Connection Service 2 Motor NoiseEven 3 Speed Controls Tidbits 4 EAASome Follow-up 5 US F3E Effort 6 Senior Skyvolt flight Profile Flightec SEC-Il speed control speced operate motors up 40 cobalts Bob Shipton Detroit holding 1700 sq neresnaw ig agiet UI U D Energy storage eighteen 1200s Motivation geared cobalt 40 turnIng Master Airscrew 14 x 6 Model actual size original Old-Timer 60 40 30 20 10 Dr Cohn McKinley Winston-Salem NC about set deBolt Bipe down takeoff Scene 1991 Labor Day VFRCS meet Selinsgrove PA Vintage affair brought out RCs fifties early sixtiesseveral electrified FOR INFORMATION CONTACT Show Directors RON STAHL 4521 Bellvieu Ave Baltimore MD 21215 410-664-2712 DAVE MITCHELL 410-668-6690 MARC SH MID ATLANTIC RADIO CONTROL JUNE 6 7 1992 Saturday 9 am 5 pm Sunday 10 am 4 pm MARYLAND STATE FAIR GROUNDS TIMONIUM MARYLAND Sponsored c RADIO CONTROL MODELERS BALTIMORE PADONIA RD TO FREDRICK TIMONIUM RD95 BALTIMORE BALTO WASH PKWYA TO WASHINGTONNORTH Over 100 Manufacurers Static Displays Swapshop Radio Kit & Equipment Raffle Door Prizes Free Parking 5000 Cars Refreshment Centers Indoor & Outdoor Demonstrations Factory Teams Aircraft Cars Boats Radios Engines Transmitter Testing 9000 Gallon Outdoor Boat Pond RIC Car Racing AS ALWAYS SELLING SHOW rise time MOSFET gates speed control products preclude particular kind potential interferenceHeres brief tutorial MOSFET used speed controls used switch apply motor battery voltage motor MOSFET three terminal device wherein three parts component source drain gate Normally several MOSFETS used parallel share motor current hurdenThink combined sources drains themselves switch source always wired motor battery negative drain wired motor terminal other motor terminal connected motor battery positive parallel gates can thought sort switch handle positive voltage applied gates parallel drainsource pairs conduct switch closes motor runs gate control voltage comes rest electronics speed control decodes received throttle signal like servo would faster control voltage applied gate faster switch closesThus drive waveform gate slowed down motor voltage switching also slower slower latter waveform less radiated interference present Keep Continued page 160 April 1992 63 SWAP SHOP $10 FULL TABLE PER DAY NO DEALERS PLEASE Limit 2 tables per person -SWAP SHOP ONLYFor Pre-Registration call WAYNE MELLOR 410-788-3742 evenings ieciric conversion OT iaewaters IIaymate 40 klt rendered John Hickey Hatfield PA Astro 40 geared cobalt eighteen 1200s JOMAR speed control Plane 5 314 lb up John eventually substituted dural formed gear wire version shown Beautiful Ford TnMotor L built Paul McEntarfer Waterford CT based RCM plans wet power Its 1112 scale 74-In span up 108 oz Electric Challenge R Charles Evans Clarcona FL charges motor pack solar rack control box bought lots solar flashlights stripped out goodies serleslparalleled solar cells Talk about flying freel THREADS Use sleeves material CA will bond Six sizes2 #4 #6 #8 #10 1/4 x 20 Perfect hatches cowls canopies engines servos landing gears wings anything mounts machine screw metal screw thread Uses depend imagination Color sleeve denotes size Can used thread lockers mind speed still order tens millionths secondPlease note switching speed related speed control switching rate latter either frame rate high rate latter terms describe often cycles per second battery voltage applied motor Frame rate usually about 50 times second High rate usually several thousand times per secondThe December 1989 column discussed relative merits both types think initiated demise frame rate controls model aircraft applications say because following appearance column frame rate AUL bUMW Ohio % 11376 Ridgeway Road Kensington OH 44427 controls seemed disappear market although such effect intent column offeringNow back track Carefully controlled just buzzword means something such thing having gate waveforms too slow leads inefficient speed control operation especially high rate controls summary motor drive waveform thats too fast may result radio interference thats too slow will likely result hot MOSFETSor worse Joes products optimized betweenJoe also tells has found powersystem-related interference can greater high resistance batteries has found cell types such SCEs .. somehow seem exacerbate noise situation. compared SCRs Ill admit Im sure understand coming Joea pioneer Electric speed control technologyI accept itIn same letter Joe also noted has recently upgraded popular SM series speed controls changing board FR4 material instead ceramic type new material crash resistant addition JOMAR B&P Associates Gives Total Flight Line FREEDOM battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire 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 has incorporated upgraded automotivetype regulator design tolerant line spikesIncidentally SM means surface mount refers parts Joe uses products leadless components simply surface-soldered place opposed leaded components soldered PC board holes results significant size reduction finished assemblies Several manufacturers now using surface mount technologyFinally Joe has asked Id pass along fact JOMAR has new address Its JOMAR 8606 Susanview Lane Cincinnati OH 45244 Tel 5 13/4740985 High rates cant help being amused some advertising Ive noticed lately seems recenfly manufacturers speed controls RC cars have caught merits high rate techniques now number such devices being offeredThe amusing part advertising continuing trend some RC car control suppliers trying out-spec competitors parameter seems used way speed control current rating Ive seen controls presented being capable handling 600 amps overkill say least Amusing though Heres whyConsider new Astro Zero Loss connectors discussed September 1991 column reported samples displayed contact resistance approximately 228 micro-ohms Thats Conunued page 162 160 Model Aviation ALL price $169 package B 216-223-1950 RC Electrics/Kopski Continued page 63 Obechi Large Sheets Please call 404 642-0645 send SASE #7 Creekpark Ct Roswdll GA 30076 its scak kits engines accessories want & want em now got emFrank Tiano .boat car kits hardto-find pans & anything need want.its stock Joe Manzella SHIPPED WITHIN 24 HRS 1387 N Military Trail West Palm Deach FL 3240 407-688-d3669 HOBBY SUPER IUKL Qj~ R/C GOODIES VL PRODUCTS FLITE SYSTEMS VL-111 SYSTEM MOTOR REDUCTION GEAR BOX 2 PROPS 852 BATrERY CHGE CQRD 32 GRAMS F-F MODELS TO 30 INCH SPAN 2495 VL-I11R SYSTEM SAME AS VL111 EXCEPT REMOTE BArr MOUNTING $2795 VL-102 SYSTEM F-F OR LITE R/C MODELS 2550 IN SPAN POWERFUL HYTORK MOTOR & GEARBOX PROP 3-CELL BATT SWITCH & CHGE CORD SYSTEM WEIGHT 71 GRAMS -$3295 MASTER AIRSCREW FEATURES COMPACT DESIGN HIGH QUALITY GEARS & BEARINGS THREE GEAR RATIOS AVAIL ABLE FOR ELECTRIC FLIGHT 25 30 351 SPECIFV FOR 05 ELECTRIC REG $1595 S&H $250 0000228 ohmsvery low resistance indeed Now consider 600 amps flowing through resistance cant imagine such current levels could possibly come lets pretend anyway associated connector power loss contact would PR 600 x 600 x 0000228 82 watts Thats 164 watts two-pin connector Instant meltdown see itAn amusing calculation would associated wire Lets assume power system installation uses foot #16 wire wire has resistance about 442 milliohms 000442 ohms per foot 600 amps flowing voltage loss wire alone would x R 600 x 000442about 27 volts associated power loss would MINI ELECTRIC SYSTEMS AND ELECTRIC GEAR BOXES HILINE PRODUCTS FLITE SYSTEM$ MINI-B F-F SYSTEM 6W MOTOR SW HARNESS PROP 3 X 100 NICADS FOR MODELS 3-5 OZ. 100-150 SOIN WING AREA -47 GRAMS $2995 IMP-30 F-F OR SMALL R/C TO 10 OZ & 150 SO IN SYSTEM WITH 30 WATT MOTOR 5 X 3 PROP SWITCH HARNESS 3 275 MA NICADS SYSTEM WEIGHT 115 GRAMS 3095 W/MOTORR/C PLANES 6 X 4 PROP SWITCH250-300 HARNESS4 X 800 NICADS5Q IN WEIGHT 230 GRAMS$4595 ADD $450 S & H FOR ANY SYSTEM IN THIS AD COMPLETE BROCHURE GIVES DETAILS ON ALL ABOVE UNITS AS WELL AS ALL ASTRO FLIGHT SYSTEMS & ACCESSORIES AVAILABLE FROM CHARLIES R/C GOODIES voltage times current producing 27 x 600 watts wire molten metal Sometimes think car guys have flights fancy aeromodelersMaybe Im missing something sort hype seems like just that dont see merit such seemingly ridiculous speed control rating Its sort like installing thumb tack sledge hammerOn other hand since readily admit knowing everything someone can enlighten regarding merits such specifications Id happy add knowledge bank share readers column future Meanwhile Im suggesting readers swayed such offerings seemingly excessive example aboveNow something substantive Recently reader advised problem experienced using RCD receiver Flightec speed control According reader Charles Evans RCD output pulse voltage just about three volts u QUALITY FIBERGLASS FRENCH TR-260 1* Four-StrokeEngine KITS IU 416 587-3610I TR-260I SPAN 71 AREAB58sq ENG 90-120 4 CYCLE si~S WT APPROX 7585 LB-w k1T FEATURES3 $18499 USLIGHTWEIGHT FIBERGLASS FUSELAGE COWL CANOPY AND U ORDER BY PHONE 7 DAYS WEEKWHEEL PANTS BALSA COVERED FOAM WING WITH LE-TE IN PLACEAND SANDED SELECTED BALSA 416 5204192CUT STAB RUDDER ELEVATORS & AILERONS T6 ALUMINUM ADD $1500 postageLANDING GEARS HARDWARE AND INSTRUCTIONSInfo $200g QUADROTECH Fax 416 283-6538 low 2 weeks delnery 3148 KINGSTON RD STE 202 BOX 158 SCARBOROUGH ONT MiM 1P4 CANADA ghtec control needs operate Charles wound up using interface buffer circuit convert receiver output higher voltage swing now wellUpon receipt letter pulled RCD Senior Skyvolt sure enough servo drive pulses just little over three volts Now happens plane has Horak control pulled see just what input signal necessary run itI have servo tester good speed controls too has adjustable output level control Using found particular speed control operates below volt input clearly particular receiver/speed control combo very workable other hand also have receivers output three volts other speed controls dont know necessary input pulse minimum amplitude guess Ive just managed avoid incompatible combinations up now paying attention possibility such potential problems 1 hope clear information offered critique products particular rather note some incompatible combinations products occur Specifically neither named product above individually deficientI know lots folks very successfully using both products mentioned other combinationswith no problems am fact can see could mix varied manufacturers receivers Continued page 164 STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CIJVTING PLASTIC WOOD SOFT MEFALS LEXAN PLEXIGLASS & ETC AVAILABLE IN 006000 010 012 014 LI016 018 020 023 025 DLAMETER @ $075 EA 1 OUTSIDE032 THICKNESS NO 5 R $800 NO 503PXO14X1I4SAW$6OO OUR SAWS ONLY WORK WFFH OUR ARBOR MICRO 5ELF5TARTING TORCH No need flint matches Just press Piezo SeIf-Startisg button mcrn srze adjustable flame fhat burns 2370 uy 3 hours Operates us standard cigarette lighter butane refillable Task fits comfortably patm hand made high-impact rubber allows safe non stip comfortabte grip Supplied can butane MT775 Blow Torch$3500 IwilS nan MT77S Butane S oz$600 EASTERN TOOL& SUPPLY CO 149 GRAND ST NYC NY 10013 WRRE FOR CATALOG$300 ORDERS 212-925-1000 WHEN ORDERING PPD ADD $300 OFFICE 212-226-3749 CODADD$500 FAX212-925-1010 162 Model Aviation 4 KK Cash Prices Bold Type Add 6% Charge Cards Minimum Charge $2500 No CODs 20% Deposit Add Sales Tax Sales California Catalog $100 USA $300 Foreign 2828 Cochran St SuIte 281 V 3065 80552791148055B1 5061 alley Rubber & Engine Power Free FlIght Diepley Control Une Electric Power RJC Airplanes new Illustrated 32 page tabloId sIze catalog US ft Canada $100 Foreigh $300 Penn Valley Hobby Center B37-AW Main Se Lanedale PA 19440 215- 368-0770 FULLR PM 55 CHUCK$1 895 DREMEL 850395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCI p ULTRAFET CONTROLLER 111011 RATE motor controller $8995 8200 liz switching frequency Active Gate Drive Conleolind Rise Time cJrcuiby pravide linear response smooth acceleration higher efficiency lens motor heating other units ft 12 cell operation 18 volts maximum SMART SWITCII kMOSFET motor switch $4995 soft-start circuit reduces motor model torque stress during power up ft 10 cell operation 115 volts matimumi common features shared ULIIIAI1ET COUROLLER & SMART SWITCH Only highest current lowest on-resistance MOSIETs available have utilized lJltruFet Controller Smart Switch have continuous current rating 240 amps 100015 ohms 120 amps 0003 ohms respectively heatsink may required high motor currents and/or estendeci ran times Smart Switchs current capahility may increased 180 amps 0002 ohms 240 amps 1000 15 Ohms larger motors and/or higher performance additional $10 $20 respectively ispecify ordering nattery Eliminator Circuit defeatabie allows nirad pack power both motor receiver Low Voltage Cutoff defeatahie uses low dropout regulator shuts down motor hattery reaches ft volts allows longer motor rans compared Other systems AC DC hysteresis techniques am employed such motor turns off shatryly cutoff voltage prevent motor 1mm coming hack battery voltage rises Will work AM IM PCM radios Auto Turn Off shuts down motor receiver signal lost An Input Isolation nuffer prevents erratic motor control due sticky high current servos staff-up glitch tilter prevents motor fmm reining power up Unit shipped tinned leads Also availahie Futaha connector 8700 additional KK rumrrvwu,unu VATIVE ELECTRONICS L4L~iIYuJ1II OT DESIGN 304 Eon SouL Hodeos flese lt.epObleu 03051 603-882-6022 servos could run similar incompatibilities offering made sole purpose advising such possibilitiesFrom above have new installation brand receiver brand B speed control combo doesnt work check possible incompatibility before fall prey believing did something wrong start rewiring everything Thanks sharing experience us Charlcs EAA February issue described what appeared to nobody home situation EAAthis virtue own several letters checks bringing no response recent telephone conversation Steve Neu Prepaid Orders Money Order CurStied Chuck Shipping 8 Handling $000 COO Orders Cash Ceitilied Check collected delivery Add Sd 00 above amounts PACIORY DIRECF ONLY prices Specifications am Suhiect Change Without Notice Designed Manufactured USA US F3E Team fame learned situation EAA related few interested folks trying work being able alone forever Some have just given upI understand Ive seen kind situation both modeling other aspects life well Indeed clubs characterized having 10% active core seems everything rest roster aside offering occasional criticisms whats going otherwise just flies freeOften members active core simply give up Anyway understand EAA now bit standstill some discussion revitalization future So like have written and/or sent dues money EAA past have no response part least explanation Stay tuned.. Speaking Steve Neu Id like pass along some thoughts time regarding US F3E its efforts first met Steve 1991 KRC meet dazzled everyone spectacular performance F3E machines So impressed officers members KRC club voted send donation support Team effortan action beyond scope 1991 club budgetNow Im well aware average readers column largely sport fliers little no competitive interest too must admit perceive US F3E effort worthy Electric cause its own right Im suggesting also might want consider lending some support either individual clubI have offered Steve some column space can fully describe F3E activity way Im hoping help muster broad-based support team scheduled compete August 1992 So again stay tuned.. Senior Skyvolt flight profile follows Last months column included similar presentation Electrified Seniorita got idea another graph totally different plane might interest Seniorita Senior Skyvolt two planes Ive flying recentlyThe plot time chart shown column characterizes 259 flights big Skyvolt including some pilots other myself As shown flight time presented 15-second increments clear histogram Senior Confinued page 166 Box 1063 Lorain Ohio 44055 MICRA Phone 216 282-8354 PA 16 Clipper Taylororaft U Horn A4 an Mosquto Big Flying Scale Kits Over Two Foot Span *Piper Cub1495 *Slinson 1251495 *Piper PA-161495 Semi-Scale Kits C02 Rubber Power 22Span *TayorcrSft1095 *StinSon voyager1095 *PC-6 Porler1095 Contest-Sport Kits * Hornet Embryo995 * Hornet P-301495 FitS F-30 & Pee Wee Rules Outdoor Peanut Scale Kits 13Span *Cub895 *Slinnon 125895 *Vagabond895 *Farman895 *Jode895 *Fike995 1/2 RIO Gas Electric Kits Fits Astro 035 Taylorcraft3995 Stinson 1253995 HARD TO FIND ITEMS Brown 002 Motors Accessories Over 20 Sizes Rubber Stripl Japanese Tissue Super Fine Balsa Sheets & Strips Add 10% Shipping Minimum Shipping CATALOG $200 164 Model Aviation KINGSWAY R/C HOBBY SUPPLY Spectahlzlng RIC Aircraft Supplies SS81 Rlchorond7139778141 Hounlon TX 77058us WATTS 18008217783 maj1or decalsOver85O Select *7-1/4 Scale & S Giant Scaie38Sheets 38Sheets 38Sheds *Propeller Decals WT onle 7 Sheels3sizeson ea ABCD___ .40 Size Markings or8Sheels FSiaes-12 * Nomenelalure 42 0SAEE*Leilers Numbers 11 Colors See coior eharl L * Flags American Uniled Kingdom Contetierale * Slats 11 Colors 9 Sizes plus Sheel 01 Assorted Sites * Trim Sheets 43/4 28 ii Colors See churl zz * Aircraft Markings84 Sets * Squadron Insignias174 SeIs DECALS3OO PRESSURE SENSITIVE R TRANSFER Authentic model insignias pressure sensrttne mater Iranster 1/4 scale 40 80 ntis stars flags tellers numhers trim r decals size propeller decals World War II kill mark sheelsuO$II NORTHEAST SCREEN GRAPHICS 21 FISHER AVE EAST LONGMEADOW MA 01028 TEL 413 528 4110 w- Write today catalogue w- We guarantee prices complete No hidden charges w- We pay shipping ship immediately $300 catalogue charge refundable first order $20 100 PARK AVENUE CARMECHAELS PA 15320 Skyvolt basically five- six-minute airplane flights falling much outside numbers generally experimental some way mean shorter longer flights may have included incomplete charges prop changes flights cruise power levels etc such atypical As refresher Senior simply scale-up Skyvolt January 1991 MA discussed some detail article weighs 85 oz has 600 sq area Motivation cobalt 40 direct Energy storage eighteen 1200 mAh SCRsThis plane best performer very capable aerobatic craft Indeed better flier am pilot have handed controls some Largest Supplier STERLING Control Line Kits Over 34 choose highly skilled pilots seen some things done done plane case plane flown lot differently Seniorita such flight profile decidedly different can refer March issue compare twoFor reference purposes unlike Seniorita Senior Skyvolt almost always flown through essentially continuous maneuvers play throttle flight long according need ie attempting conserve energy needed order make available needed feel results best overall flight possibleA maneuver set particularly like use promote Electric take off immediately roll inverted low ground climb through half loop roll inverted again hold attitude short distance finally pull inverted snapall within seconds takeoff sequence has convinced Electric disbelieverLike Senioritas Senior Skyvolts pack always time-charged using timer control several chargers have suppose peak charging would add some flight times presented dont care wait extra five minutes during charge just get few tens seconds air time After Im sport flierSo closes April column Please sure enclose SASE correspondence youd like reply Happy Electric Springtime Landings Everyone RC Soaring/Blakeslee Continued page 65 thermal Tall grass will serve good telltale wind direction Watch what other gliders doing sky flight characteristics can show whether sink lift strong lift may want join However too high above bubble may already detached could get caught too far away sufficient altitude make return trip landing zone Along same lines study pattern passing thermals watching gliders marking Pay attention location altitude time wind direction Under same conditions thermal generators usLially kick off thermals regular intervals known cycling information can increase odds continued page 168 k9 rn-k R/C Flight Simulator IBM PCs & Compatibles Excellent flight equations Superb graphics Easily set up fly like bird features aid learning Skylark realistic RIC flight simulator available todayl Visit booth Toledo Call Now 313 662-LARK 166 Model Aviation Flying ~The way meant thats beauty Control Line Planes want experience flying way meant way American pioneers like Charles Lindbergh flew FEEL airplane Control Line Planes ic9oA g has worlds largest selection control-line planes equipment including hard-to-find classics LATHESeLATHESOLATHESOLATHES ~SENO $100 1LJBLUEALETIU FOR pJo/uc4einvMeoLarnc COMPLETE CATALOG __CONTAINING 2-3538MANY FAMOUS cATALOG $100NAME LATHES PO Box 536-Ye Hurricane WV 25526 Airplane version coming soon
Edition: Model Aviation - 1992/04
Page Numbers: 62, 63, 160, 162, 164, 166
THIS month Electric Connection Service offers two new names connect First up Charles Moulton RR 1 Box 1920 Troy VA 22974 Charles tells new area anxious connect other local E-fliers Charles favors small Electrics interested kindsNext sort twist Model Aviations own Old-Timer Free flight columnist Bill Baker sent note offering help other Electrically oriented modelers area Bills personal Electric preference Soaring has broad-based interest evidenced photo December 91 column Electric Sunny bipe Feel free contact Bill 1902 Peter Pan Norman OK 73072 tell im Bob sent ya motor noise Joe Utazi head modeler JOMAR prompted December column subject motor noise provide related information ponder As refresher column discussed radio interference resulting very fast waveform edges switched motor voltage can associated ordinary speed control operationJoe wrote advise has recently incorporated carefully controlled .... 50 WII IMinutes DuratIon 62 Model Aviation Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 THIS MONTHS TOPICS 1 Electric Connection Service 2 Motor NoiseEven 3 Speed Controls Tidbits 4 EAASome Follow-up 5 US F3E Effort 6 Senior Skyvolt flight Profile Flightec SEC-Il speed control speced operate motors up 40 cobalts Bob Shipton Detroit holding 1700 sq neresnaw ig agiet UI U D Energy storage eighteen 1200s Motivation geared cobalt 40 turnIng Master Airscrew 14 x 6 Model actual size original Old-Timer 60 40 30 20 10 Dr Cohn McKinley Winston-Salem NC about set deBolt Bipe down takeoff Scene 1991 Labor Day VFRCS meet Selinsgrove PA Vintage affair brought out RCs fifties early sixtiesseveral electrified FOR INFORMATION CONTACT Show Directors RON STAHL 4521 Bellvieu Ave Baltimore MD 21215 410-664-2712 DAVE MITCHELL 410-668-6690 MARC SH MID ATLANTIC RADIO CONTROL JUNE 6 7 1992 Saturday 9 am 5 pm Sunday 10 am 4 pm MARYLAND STATE FAIR GROUNDS TIMONIUM MARYLAND Sponsored c RADIO CONTROL MODELERS BALTIMORE PADONIA RD TO FREDRICK TIMONIUM RD95 BALTIMORE BALTO WASH PKWYA TO WASHINGTONNORTH Over 100 Manufacurers Static Displays Swapshop Radio Kit & Equipment Raffle Door Prizes Free Parking 5000 Cars Refreshment Centers Indoor & Outdoor Demonstrations Factory Teams Aircraft Cars Boats Radios Engines Transmitter Testing 9000 Gallon Outdoor Boat Pond RIC Car Racing AS ALWAYS SELLING SHOW rise time MOSFET gates speed control products preclude particular kind potential interferenceHeres brief tutorial MOSFET used speed controls used switch apply motor battery voltage motor MOSFET three terminal device wherein three parts component source drain gate Normally several MOSFETS used parallel share motor current hurdenThink combined sources drains themselves switch source always wired motor battery negative drain wired motor terminal other motor terminal connected motor battery positive parallel gates can thought sort switch handle positive voltage applied gates parallel drainsource pairs conduct switch closes motor runs gate control voltage comes rest electronics speed control decodes received throttle signal like servo would faster control voltage applied gate faster switch closesThus drive waveform gate slowed down motor voltage switching also slower slower latter waveform less radiated interference present Keep Continued page 160 April 1992 63 SWAP SHOP $10 FULL TABLE PER DAY NO DEALERS PLEASE Limit 2 tables per person -SWAP SHOP ONLYFor Pre-Registration call WAYNE MELLOR 410-788-3742 evenings ieciric conversion OT iaewaters IIaymate 40 klt rendered John Hickey Hatfield PA Astro 40 geared cobalt eighteen 1200s JOMAR speed control Plane 5 314 lb up John eventually substituted dural formed gear wire version shown Beautiful Ford TnMotor L built Paul McEntarfer Waterford CT based RCM plans wet power Its 1112 scale 74-In span up 108 oz Electric Challenge R Charles Evans Clarcona FL charges motor pack solar rack control box bought lots solar flashlights stripped out goodies serleslparalleled solar cells Talk about flying freel THREADS Use sleeves material CA will bond Six sizes2 #4 #6 #8 #10 1/4 x 20 Perfect hatches cowls canopies engines servos landing gears wings anything mounts machine screw metal screw thread Uses depend imagination Color sleeve denotes size Can used thread lockers mind speed still order tens millionths secondPlease note switching speed related speed control switching rate latter either frame rate high rate latter terms describe often cycles per second battery voltage applied motor Frame rate usually about 50 times second High rate usually several thousand times per secondThe December 1989 column discussed relative merits both types think initiated demise frame rate controls model aircraft applications say because following appearance column frame rate AUL bUMW Ohio % 11376 Ridgeway Road Kensington OH 44427 controls seemed disappear market although such effect intent column offeringNow back track Carefully controlled just buzzword means something such thing having gate waveforms too slow leads inefficient speed control operation especially high rate controls summary motor drive waveform thats too fast may result radio interference thats too slow will likely result hot MOSFETSor worse Joes products optimized betweenJoe also tells has found powersystem-related interference can greater high resistance batteries has found cell types such SCEs .. somehow seem exacerbate noise situation. compared SCRs Ill admit Im sure understand coming Joea pioneer Electric speed control technologyI accept itIn same letter Joe also noted has recently upgraded popular SM series speed controls changing board FR4 material instead ceramic type new material crash resistant addition JOMAR B&P Associates Gives Total Flight Line FREEDOM battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire 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 has incorporated upgraded automotivetype regulator design tolerant line spikesIncidentally SM means surface mount refers parts Joe uses products leadless components simply surface-soldered place opposed leaded components soldered PC board holes results significant size reduction finished assemblies Several manufacturers now using surface mount technologyFinally Joe has asked Id pass along fact JOMAR has new address Its JOMAR 8606 Susanview Lane Cincinnati OH 45244 Tel 5 13/4740985 High rates cant help being amused some advertising Ive noticed lately seems recenfly manufacturers speed controls RC cars have caught merits high rate techniques now number such devices being offeredThe amusing part advertising continuing trend some RC car control suppliers trying out-spec competitors parameter seems used way speed control current rating Ive seen controls presented being capable handling 600 amps overkill say least Amusing though Heres whyConsider new Astro Zero Loss connectors discussed September 1991 column reported samples displayed contact resistance approximately 228 micro-ohms Thats Conunued page 162 160 Model Aviation ALL price $169 package B 216-223-1950 RC Electrics/Kopski Continued page 63 Obechi Large Sheets Please call 404 642-0645 send SASE #7 Creekpark Ct Roswdll GA 30076 its scak kits engines accessories want & want em now got emFrank Tiano .boat car kits hardto-find pans & anything need want.its stock Joe Manzella SHIPPED WITHIN 24 HRS 1387 N Military Trail West Palm Deach FL 3240 407-688-d3669 HOBBY SUPER IUKL Qj~ R/C GOODIES VL PRODUCTS FLITE SYSTEMS VL-111 SYSTEM MOTOR REDUCTION GEAR BOX 2 PROPS 852 BATrERY CHGE CQRD 32 GRAMS F-F MODELS TO 30 INCH SPAN 2495 VL-I11R SYSTEM SAME AS VL111 EXCEPT REMOTE BArr MOUNTING $2795 VL-102 SYSTEM F-F OR LITE R/C MODELS 2550 IN SPAN POWERFUL HYTORK MOTOR & GEARBOX PROP 3-CELL BATT SWITCH & CHGE CORD SYSTEM WEIGHT 71 GRAMS -$3295 MASTER AIRSCREW FEATURES COMPACT DESIGN HIGH QUALITY GEARS & BEARINGS THREE GEAR RATIOS AVAIL ABLE FOR ELECTRIC FLIGHT 25 30 351 SPECIFV FOR 05 ELECTRIC REG $1595 S&H $250 0000228 ohmsvery low resistance indeed Now consider 600 amps flowing through resistance cant imagine such current levels could possibly come lets pretend anyway associated connector power loss contact would PR 600 x 600 x 0000228 82 watts Thats 164 watts two-pin connector Instant meltdown see itAn amusing calculation would associated wire Lets assume power system installation uses foot #16 wire wire has resistance about 442 milliohms 000442 ohms per foot 600 amps flowing voltage loss wire alone would x R 600 x 000442about 27 volts associated power loss would MINI ELECTRIC SYSTEMS AND ELECTRIC GEAR BOXES HILINE PRODUCTS FLITE SYSTEM$ MINI-B F-F SYSTEM 6W MOTOR SW HARNESS PROP 3 X 100 NICADS FOR MODELS 3-5 OZ. 100-150 SOIN WING AREA -47 GRAMS $2995 IMP-30 F-F OR SMALL R/C TO 10 OZ & 150 SO IN SYSTEM WITH 30 WATT MOTOR 5 X 3 PROP SWITCH HARNESS 3 275 MA NICADS SYSTEM WEIGHT 115 GRAMS 3095 W/MOTORR/C PLANES 6 X 4 PROP SWITCH250-300 HARNESS4 X 800 NICADS5Q IN WEIGHT 230 GRAMS$4595 ADD $450 S & H FOR ANY SYSTEM IN THIS AD COMPLETE BROCHURE GIVES DETAILS ON ALL ABOVE UNITS AS WELL AS ALL ASTRO FLIGHT SYSTEMS & ACCESSORIES AVAILABLE FROM CHARLIES R/C GOODIES voltage times current producing 27 x 600 watts wire molten metal Sometimes think car guys have flights fancy aeromodelersMaybe Im missing something sort hype seems like just that dont see merit such seemingly ridiculous speed control rating Its sort like installing thumb tack sledge hammerOn other hand since readily admit knowing everything someone can enlighten regarding merits such specifications Id happy add knowledge bank share readers column future Meanwhile Im suggesting readers swayed such offerings seemingly excessive example aboveNow something substantive Recently reader advised problem experienced using RCD receiver Flightec speed control According reader Charles Evans RCD output pulse voltage just about three volts u QUALITY FIBERGLASS FRENCH TR-260 1* Four-StrokeEngine KITS IU 416 587-3610I TR-260I SPAN 71 AREAB58sq ENG 90-120 4 CYCLE si~S WT APPROX 7585 LB-w k1T FEATURES3 $18499 USLIGHTWEIGHT FIBERGLASS FUSELAGE COWL CANOPY AND U ORDER BY PHONE 7 DAYS WEEKWHEEL PANTS BALSA COVERED FOAM WING WITH LE-TE IN PLACEAND SANDED SELECTED BALSA 416 5204192CUT STAB RUDDER ELEVATORS & AILERONS T6 ALUMINUM ADD $1500 postageLANDING GEARS HARDWARE AND INSTRUCTIONSInfo $200g QUADROTECH Fax 416 283-6538 low 2 weeks delnery 3148 KINGSTON RD STE 202 BOX 158 SCARBOROUGH ONT MiM 1P4 CANADA ghtec control needs operate Charles wound up using interface buffer circuit convert receiver output higher voltage swing now wellUpon receipt letter pulled RCD Senior Skyvolt sure enough servo drive pulses just little over three volts Now happens plane has Horak control pulled see just what input signal necessary run itI have servo tester good speed controls too has adjustable output level control Using found particular speed control operates below volt input clearly particular receiver/speed control combo very workable other hand also have receivers output three volts other speed controls dont know necessary input pulse minimum amplitude guess Ive just managed avoid incompatible combinations up now paying attention possibility such potential problems 1 hope clear information offered critique products particular rather note some incompatible combinations products occur Specifically neither named product above individually deficientI know lots folks very successfully using both products mentioned other combinationswith no problems am fact can see could mix varied manufacturers receivers Continued page 164 STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CIJVTING PLASTIC WOOD SOFT MEFALS LEXAN PLEXIGLASS & ETC AVAILABLE IN 006000 010 012 014 LI016 018 020 023 025 DLAMETER @ $075 EA 1 OUTSIDE032 THICKNESS NO 5 R $800 NO 503PXO14X1I4SAW$6OO OUR SAWS ONLY WORK WFFH OUR ARBOR MICRO 5ELF5TARTING TORCH No need flint matches Just press Piezo SeIf-Startisg button mcrn srze adjustable flame fhat burns 2370 uy 3 hours Operates us standard cigarette lighter butane refillable Task fits comfortably patm hand made high-impact rubber allows safe non stip comfortabte grip Supplied can butane MT775 Blow Torch$3500 IwilS nan MT77S Butane S oz$600 EASTERN TOOL& SUPPLY CO 149 GRAND ST NYC NY 10013 WRRE FOR CATALOG$300 ORDERS 212-925-1000 WHEN ORDERING PPD ADD $300 OFFICE 212-226-3749 CODADD$500 FAX212-925-1010 162 Model Aviation 4 KK Cash Prices Bold Type Add 6% Charge Cards Minimum Charge $2500 No CODs 20% Deposit Add Sales Tax Sales California Catalog $100 USA $300 Foreign 2828 Cochran St SuIte 281 V 3065 80552791148055B1 5061 alley Rubber & Engine Power Free FlIght Diepley Control Une Electric Power RJC Airplanes new Illustrated 32 page tabloId sIze catalog US ft Canada $100 Foreigh $300 Penn Valley Hobby Center B37-AW Main Se Lanedale PA 19440 215- 368-0770 FULLR PM 55 CHUCK$1 895 DREMEL 850395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCI p ULTRAFET CONTROLLER 111011 RATE motor controller $8995 8200 liz switching frequency Active Gate Drive Conleolind Rise Time cJrcuiby pravide linear response smooth acceleration higher efficiency lens motor heating other units ft 12 cell operation 18 volts maximum SMART SWITCII kMOSFET motor switch $4995 soft-start circuit reduces motor model torque stress during power up ft 10 cell operation 115 volts matimumi common features shared ULIIIAI1ET COUROLLER & SMART SWITCH Only highest current lowest on-resistance MOSIETs available have utilized lJltruFet Controller Smart Switch have continuous current rating 240 amps 100015 ohms 120 amps 0003 ohms respectively heatsink may required high motor currents and/or estendeci ran times Smart Switchs current capahility may increased 180 amps 0002 ohms 240 amps 1000 15 Ohms larger motors and/or higher performance additional $10 $20 respectively ispecify ordering nattery Eliminator Circuit defeatabie allows nirad pack power both motor receiver Low Voltage Cutoff defeatahie uses low dropout regulator shuts down motor hattery reaches ft volts allows longer motor rans compared Other systems AC DC hysteresis techniques am employed such motor turns off shatryly cutoff voltage prevent motor 1mm coming hack battery voltage rises Will work AM IM PCM radios Auto Turn Off shuts down motor receiver signal lost An Input Isolation nuffer prevents erratic motor control due sticky high current servos staff-up glitch tilter prevents motor fmm reining power up Unit shipped tinned leads Also availahie Futaha connector 8700 additional KK rumrrvwu,unu VATIVE ELECTRONICS L4L~iIYuJ1II OT DESIGN 304 Eon SouL Hodeos flese lt.epObleu 03051 603-882-6022 servos could run similar incompatibilities offering made sole purpose advising such possibilitiesFrom above have new installation brand receiver brand B speed control combo doesnt work check possible incompatibility before fall prey believing did something wrong start rewiring everything Thanks sharing experience us Charlcs EAA February issue described what appeared to nobody home situation EAAthis virtue own several letters checks bringing no response recent telephone conversation Steve Neu Prepaid Orders Money Order CurStied Chuck Shipping 8 Handling $000 COO Orders Cash Ceitilied Check collected delivery Add Sd 00 above amounts PACIORY DIRECF ONLY prices Specifications am Suhiect Change Without Notice Designed Manufactured USA US F3E Team fame learned situation EAA related few interested folks trying work being able alone forever Some have just given upI understand Ive seen kind situation both modeling other aspects life well Indeed clubs characterized having 10% active core seems everything rest roster aside offering occasional criticisms whats going otherwise just flies freeOften members active core simply give up Anyway understand EAA now bit standstill some discussion revitalization future So like have written and/or sent dues money EAA past have no response part least explanation Stay tuned.. Speaking Steve Neu Id like pass along some thoughts time regarding US F3E its efforts first met Steve 1991 KRC meet dazzled everyone spectacular performance F3E machines So impressed officers members KRC club voted send donation support Team effortan action beyond scope 1991 club budgetNow Im well aware average readers column largely sport fliers little no competitive interest too must admit perceive US F3E effort worthy Electric cause its own right Im suggesting also might want consider lending some support either individual clubI have offered Steve some column space can fully describe F3E activity way Im hoping help muster broad-based support team scheduled compete August 1992 So again stay tuned.. Senior Skyvolt flight profile follows Last months column included similar presentation Electrified Seniorita got idea another graph totally different plane might interest Seniorita Senior Skyvolt two planes Ive flying recentlyThe plot time chart shown column characterizes 259 flights big Skyvolt including some pilots other myself As shown flight time presented 15-second increments clear histogram Senior Confinued page 166 Box 1063 Lorain Ohio 44055 MICRA Phone 216 282-8354 PA 16 Clipper Taylororaft U Horn A4 an Mosquto Big Flying Scale Kits Over Two Foot Span *Piper Cub1495 *Slinson 1251495 *Piper PA-161495 Semi-Scale Kits C02 Rubber Power 22Span *TayorcrSft1095 *StinSon voyager1095 *PC-6 Porler1095 Contest-Sport Kits * Hornet Embryo995 * Hornet P-301495 FitS F-30 & Pee Wee Rules Outdoor Peanut Scale Kits 13Span *Cub895 *Slinnon 125895 *Vagabond895 *Farman895 *Jode895 *Fike995 1/2 RIO Gas Electric Kits Fits Astro 035 Taylorcraft3995 Stinson 1253995 HARD TO FIND ITEMS Brown 002 Motors Accessories Over 20 Sizes Rubber Stripl Japanese Tissue Super Fine Balsa Sheets & Strips Add 10% Shipping Minimum Shipping CATALOG $200 164 Model Aviation KINGSWAY R/C HOBBY SUPPLY Spectahlzlng RIC Aircraft Supplies SS81 Rlchorond7139778141 Hounlon TX 77058us WATTS 18008217783 maj1or decalsOver85O Select *7-1/4 Scale & S Giant Scaie38Sheets 38Sheets 38Sheds *Propeller Decals WT onle 7 Sheels3sizeson ea ABCD___ .40 Size Markings or8Sheels FSiaes-12 * Nomenelalure 42 0SAEE*Leilers Numbers 11 Colors See coior eharl L * Flags American Uniled Kingdom Contetierale * Slats 11 Colors 9 Sizes plus Sheel 01 Assorted Sites * Trim Sheets 43/4 28 ii Colors See churl zz * Aircraft Markings84 Sets * Squadron Insignias174 SeIs DECALS3OO PRESSURE SENSITIVE R TRANSFER Authentic model insignias pressure sensrttne mater Iranster 1/4 scale 40 80 ntis stars flags tellers numhers trim r decals size propeller decals World War II kill mark sheelsuO$II NORTHEAST SCREEN GRAPHICS 21 FISHER AVE EAST LONGMEADOW MA 01028 TEL 413 528 4110 w- Write today catalogue w- We guarantee prices complete No hidden charges w- We pay shipping ship immediately $300 catalogue charge refundable first order $20 100 PARK AVENUE CARMECHAELS PA 15320 Skyvolt basically five- six-minute airplane flights falling much outside numbers generally experimental some way mean shorter longer flights may have included incomplete charges prop changes flights cruise power levels etc such atypical As refresher Senior simply scale-up Skyvolt January 1991 MA discussed some detail article weighs 85 oz has 600 sq area Motivation cobalt 40 direct Energy storage eighteen 1200 mAh SCRsThis plane best performer very capable aerobatic craft Indeed better flier am pilot have handed controls some Largest Supplier STERLING Control Line Kits Over 34 choose highly skilled pilots seen some things done done plane case plane flown lot differently Seniorita such flight profile decidedly different can refer March issue compare twoFor reference purposes unlike Seniorita Senior Skyvolt almost always flown through essentially continuous maneuvers play throttle flight long according need ie attempting conserve energy needed order make available needed feel results best overall flight possibleA maneuver set particularly like use promote Electric take off immediately roll inverted low ground climb through half loop roll inverted again hold attitude short distance finally pull inverted snapall within seconds takeoff sequence has convinced Electric disbelieverLike Senioritas Senior Skyvolts pack always time-charged using timer control several chargers have suppose peak charging would add some flight times presented dont care wait extra five minutes during charge just get few tens seconds air time After Im sport flierSo closes April column Please sure enclose SASE correspondence youd like reply Happy Electric Springtime Landings Everyone RC Soaring/Blakeslee Continued page 65 thermal Tall grass will serve good telltale wind direction Watch what other gliders doing sky flight characteristics can show whether sink lift strong lift may want join However too high above bubble may already detached could get caught too far away sufficient altitude make return trip landing zone Along same lines study pattern passing thermals watching gliders marking Pay attention location altitude time wind direction Under same conditions thermal generators usLially kick off thermals regular intervals known cycling information can increase odds continued page 168 k9 rn-k R/C Flight Simulator IBM PCs & Compatibles Excellent flight equations Superb graphics Easily set up fly like bird features aid learning Skylark realistic RIC flight simulator available todayl Visit booth Toledo Call Now 313 662-LARK 166 Model Aviation Flying ~The way meant thats beauty Control Line Planes want experience flying way meant way American pioneers like Charles Lindbergh flew FEEL airplane Control Line Planes ic9oA g has worlds largest selection control-line planes equipment including hard-to-find classics LATHESeLATHESOLATHESOLATHES ~SENO $100 1LJBLUEALETIU FOR pJo/uc4einvMeoLarnc COMPLETE CATALOG __CONTAINING 2-3538MANY FAMOUS cATALOG $100NAME LATHES PO Box 536-Ye Hurricane WV 25526 Airplane version coming soon