FIRST The Electric Connection Service now over half-year old quite few people have availed themselves opportunity find oth ers locale share fun Electric Any Electric modeler club interested attract ing attention since theres no engine noise can simply request writing Ill include name upcoming column Now must again ask somethingone time youve successful receiving response listing ECS please let know Otherwise might get idea ECS working Ill tempted use column space something else mind everyone please check out folks want meet up other locals share joy Electric Robert Osorlo 1903 Sans Souci Blvd N Miami FL 33181 Don Schneider PO Box 5441 Eugene OR 97405 tel 1-503/683-6301 Some Electric meets have announced cluding eighth annual Electric RC Fly-In spon sored Puget Sound Electric Model Fliers division Boeing Hawks RC Fliers meet scheduled June 23-24 Boeing Upgraded high-versatlilty gear box Ai Tec Products inc 18800 State Rt 47 East Sidney OH 45365 Package includes three gear ratios adapter plates can fit ted variety popuiar 05-size motors features heavy 3A-in shaft collet type prop adapter its $2995 pius postage Kent Space Center Field Kent WA meet offers prizes trophies Most Aerobatic Best Scale Longest Flight Most Impressive Best Multi-Motor plus special achievement awards addition AMA event 609 will flown info contact Bernard Cawley CD 29838 48th Ave S Auburn WA 98001 tel 1-206/839-9157 Ben Almojuela Asst CD 1941 6th Ave W Seattle WA 98119 tel 1-206/283-3407 third annual Electric fun-fly July 2122 sponsored Lehigh Valley Radio Control Society meet located near Easton PA offers events skill levels including Dura tion Aerobatics events open flying day day 100-acre facility 500ft grass runway info contact Ellis Grumer 321 Aurora St Phillipsburg NJ 08865 tel 1-201/859-0969 Tom Castellano tel 1215/759-6937 Finally same Sunday July 22 Northern Connecticut Radio Control Club NCRCC will hold Third Annual Electric Fly-In meet will feature Electric clinic Larry Sribnick SR Batteries Events include Handcrafted motor-mounting plate 040 aiuminum Paul Pickwick Louisville KY used rebuilding nose Electra after rapid earthrlse hope lessly modified models original plastic cowling motor mount components 42 Model Aviation Rado Control Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 THIS MONTHS TOPICS 1 Electric Connection Service plus request 2 Electric meets PSEMF LVRCS NCRCC 3 Reader response Topics box 4 Reader response motor size 5 Reader responsespeed control trou ble 6 Electric competitive sport 7 Coming up future columns Kopskl has Electrified Sig Seniorita geared Astro 24 14 1 200-mAh SCR NI-Cds All-up weight 84 oz poses snow just before its maiden flight March 24 nice gentle filer relaxation wing has modified two extra rib bays per panci other minor structural mods benefit Electric Guidance Airtronlcs RC modeier does significant amount soidering Ungar UTC 100 soldering sta tion offers controlled variabie temperature takes standard Ungar tipsjust like Radio Shack seiis Its own irons Bob found best price $5995 Edlie Eiectronics 2700 Hempstead Turnpike Levittown NY 117561443 tei 1-516/735-3330 Catalog #TA 6215-1 takes both Beth Ann Richard Affler back steady dad Roberts Willlngboro NJ electric-powered Dirty Birdy Pattern plane Power geared Astro 40 using 28 1 200-mAh Ni-Cd cells Juice metered Jomar SC-B big system controller re worked Zinger 105 x 75 prop blasts air 13000 rpm Bad news looks like plane photos John Prestons Safety Comes First column month seven-minute precision flight spot landing Pylon event Site NCRCC Ellington Field info contact Ronald Torrito 1625 Main St East Hartford CT 06108 tel 1203/528-2227 meets CD Larry Neal tel 1-203/537-4001 Topics box thats opening columns since January 90 issue has self brought reader reaction Ive received sev eral very favorable comments no negative ones reader thought MA column should adopt format Apparently feeling right Its often too hard find subject remember seeing somewhere Top ics box instituted help situation Thanks feedback folks Some reader response much-repeated What OHFIVE question generL alized motor size issue has finally come fact Ive received six letters two brothers Boucher reader Roy McGuck First Roland Boucher Leisure Elec tronics Roland proponent displace ment method categorizing speci1ring mo tort letter Roland reviews earliest As tro products part Astro early Sev enties describes first two products 10 25 former displace ment about 15cc produced torque about 10 in-oz 10000 rpm about 01 horsepower Thats about what 10-cu -in gas engine would Similarly 25 developed about 025 hp 10000 rpm volume about 18cc point Id like note displace ment used above means armature volume ie basically size motor armature Roland likens volume displaced reciprocating piston gas engine Roland goes describe evolution 05 beginning first Astro unit displacement about 95cc horsepower about 005 goes tell perContinued page 110 Special Fast Turnaround Now Available CALL Frequency Service ACe Cirrus EK Futaba Heathkit HobbyshaCk JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Ill Fly What Fix ARAMID izLKJUUULx-AU\A CABLE NON-METALLIC NON-CARBON NO STRETCHI ELIMINATE THE MAJOR CAUSE OF INTERFERENCE FROM CONTROL CABLES AND FLYING WIRES DUPONT KEVLAR 29 BRAIDED 12 OVER 2 DYED BLACK AND COATED FOR UV PROTECTION 200 POUND STRENGTH 20 FT/PACK T4w 44d46t 44Of JOMAR PRODUCIS 2028 KnightsbrIdge Dr 513-474-0985 Cinti OH 45244 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Blocks harmful ultraviolet radiation Attractive case included Wraparound frame fits comfortably over prescription glasses . Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available Clear shop work S1325 Amber overcast days & late afternoons S14~ Gray S14~ & Mirror S19~ sunny days CA Mask S1595 Paint Mask S2O~ member club hit prop blade thrown 60 engine close range lip blade struck Safely Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer Pikes Peak RC Club Prices include shipping handling PLLJ5 See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 ICont US Mississippi 1601 924-9640 /MC July 1990 43 Conversion $3500 Includes Crystals Certification SpectrumI Analyzers CalIbrated Test Instruments Large Inventory RIC Parts Crystals UPS US Mail Federal Express Used Mastercard Visa Accepted Send Large Self Addressed Envelope Brochures HERES HOW AMAZING BALSAPITE REDUCES BUBBLES AND SAGS Iron-on coverings tend stick surface balsa & other woods often leaving trapped air sagging coming unglued Balsarite IRON-ON liquid sinks COVERING deep wood s intermixes adhesive theWITH BALSARITE covering ironed No trapped air deep permanent adhesion Eliminates sagging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Coverite Monokote Solarfilm etc must use Balsarite takes gamble out covering iron-ons New Formula Film C 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA Radio Technique/Myers Continued page 85 cells did maintain 10-amp cur rent Instead current dropped instantly con tinuously Don Srull insisted cells inadequate job hand right tested some Sanyo N-800AR cells red la bel resistor pack batteries held 10-amp current five minutes fact showed over 900 mAh usable capacity moral dont right test dont get right test results story isnt finished Bob using four-cell 50-mAh pack receiver plane order save weight batteries obvi ously couldnt stand up load receiv er two servos Benson SC-i speed control ler idle current measured 20 mA jumped hundreds mAs servos moved 50-mAb pack exhausted itself before could flying told Bob thought receiver would run bet ter three-cell 175-mAh pack tried Weight critical performance Bobs small plane three-cell/175 pack weighed about same Bobs four-cell/SO pack RC system worked better flight performance still miserable got out oscilloscope looked mo tor current Thats discovered SC1 wasnt 100% motor current showed pulses duty cycle about 80% lit tle experimenting trouble traced back three-cell pack SC-i needs full-voltage pulses four-cell pack order reach 100% duty cycle three-cell/175 pack satis fled servos needs speed controller four-cell 100-mAh battery installed radio three-cell N 800AR battery Imp 30 motor plane flew very nicely What conclusion can drawn Ulti mately both problems faced same problem case trying draw far rated current Ni-Cd batteries you will lose termi nal voltage may able fully re cover rated capacity battery order find Out what really have must test under realistic conditions RC Electrics/Kopski Continued page 43 formance displacement-standardized 05 motors has increased over yearsin part driven interest RC carsand notes current Leisure 05 develops 300% power original Astro 05 con tinues feel its shame other pi oneers Electric flight failed recognize development displacement classes Elec tric motors would have provided stable market place similar development sizes Electric motors Fifty years ago AMA recog nized displacement method choice model airplane gas engines Lets join main stream model aviation establish some dis placement classes Electric motors Roland followed up first letter sec ond latter described 05 used Continued page 112 110 Model Aviation MOONEY 201 2 SCALE 70 SPAN 7 8 LBS ENG.40-6O2CYCLE 9O4CYCLE Machine Cut Parts Balsa Kit e Plans Approved3Views Complete Construction Manual Jig Built Flying Surfaces $13995 Complete Hardware p ng Ply Capped Cowl Wing Saddle & Surfaces Complete Decals YI order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio 44060 /216 953-1188 r 0 HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 ere proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP GUNFIGHTERS *POSITIVE FEELpr CA RES ADD *USED BY TOP PILOTS625% SALES TAX *FOR FUTABA AIRTRONICS JR OTHERS PLEASE SPECIFY RADIO OT Electrics SAM 49 over nine-year peri od somewhat involved story sum mary folks involved came agree upon use legal 05 having agreed-upon displacement also adopted specific mo tor run time specific battery Illegiti mate motors such some cobalts having ar mature greater volume part accommo dated shorter motor runs Bob Boucher Astro also wrote early days Electrics invented Electric flight mind would replace noisy greasy smelly glow engines types models started small trying replace OS Max o invented Electric system could swing 7 x 4 prop 12000 rpm just like OS Max Remember 1970 20 years ago Nowadays can better can 1990 cobalt 05 can bit much 1970 OS Max 10 So what Nothing ever stands still numerical size motors descriptive physical size amount torque produce same glow engines means turn same props roughly same rpm same letter follow-up Bob goes list some nomenclature used various sup pliers eg Astro 05 15 25 40 60 Keller 50 150 Graupner 600 900 1200 2000 includes some car motors Trinity Monster Insane theres Nuclear Assault Ninja Torque zilla onall aggressive names con vey idea killing competition also de scribes motor marketing RC car field has become numbers game sup plier highest advertised rpm gets lions share market Bob further notes real' cars have names also eg Lexus 400 BMW 375 Olds 98 cant really tell much descriptions Bobs point think may names mean little maybe shouldnt have interpreta tion part reinforced suggests ge readers become fluent jargon model motor trade Reader Roy MeGuckins Fairport NY two let ters suggest motor-rating system based way real electric motors rated NEMA national organization establishes stan dards rating methods industrial electric motors Such motors typically carry nameplate listing such basic info frame size horsepower volts/amps/watts rpm torque temperature rise duty class constant intermittent etc Having received Roys letter spoke friend works manufacturer small DC motorsnot unlike kind fly tells company its competitors es sentially own thing no common agreement among respect frame size physical size/shape mounting specification case dustrial motors would allow interchangeability among manufacturers However use other terms volts/amps/watts torque rpm etc makes sense can cer tainly accept developing standardized case/ mounting specifications model plane motors probably realistic expectation categoric ally reject thought some meaningful useContinued page 115 112 ModelAviation DLJ Especially formulated use gasoline diesel fuels Wont swell harden use new transparent green fuel line perfect fuel connections fuel pumps smoke systems Sold foot Medium TYGON Large local Hobby Shop gb-fuels sure use Du-Bros Neoprene Silicone fuel Tubing.the Modelers ChoiceFUEL DU-BRO PRODUCTS INC 480 BONNER RD WAUCONDA IL 60084TUBING D&J ELECTRONICS 900 Lucy Road ll Ml 48843 546-2644 service makes RIO equipment utilizing state art electronics Spectrum Analyzer Precision Frequency Measuring equipment True 1991 Standards endorsed AMA & RCMA Transmitter Slicker Program FCC LicensedSpeed Control RepairsQualIty ServIce Transmitter Checks Only includes GOLD/SILVER sticker$400 Transmitter & Receiver Calibration$2400 Frequency Upgrades & Changes crystals extra$2900 Bench Time Repairs per hour$2500 Transmitters service will receive AMA/RCMA sticker ADD $500 FOR SHIPPING & INSURANCE TURN AROUND TIME TWO WEEKS OR LESSII ACCEPTED ful nameplate info cant adopted label stan dard feel voltage cells maxi mum current before brushes/armature die prematurely rpm cause its nice know what expect prop watts input power properly propped cause way can re late what planes will perfectly reason able certainly useful nameplate parameters needed emotionalism 'killer names Now folks maybe am being unrealistic maybe unreasonable maybe Im missing real opportunity Perhaps should go busi ness produce size fits dynamite motor Ill call MASTODON technically demanding its really Ultra-Turbo HyperSubSpace Macro-Torque Mega Machine Ill give dry magnets made psuedo-neo-unobtainium will spin genetical ly refined activated molecular bearings shaft speed normally called rpm would prob ably about 97 kiloradians per microminute Yup sounds good Thats what Ill put label Plus words cars boats trains planes skateboards Ah long last motor thinking unthinking men women children household pets can first block render ex tinct others MASTODON will allow true killer really Oh What fun Now Ive poked little fun let refer April 90 issue RCM its Silent Power column friend column author Ted Davey offers some words about motor size batteries other things well Also want thank Roland Bob Roy taking time write two letters response search such input about rest Some readers have misunderstood discussion recent columns regarding differences tween frame-rate high-rate speed con trols has taken form reader input dicating ve no trouble frame-rate control am using would expect trouble Indeed Ive used several frame-rate controls have person ally no trouble can work just fineas far working goes Power systems frame-rate controls instead highrate controls have much worse power system ef ficiency control used other On/Off manner Im getting tired writing Anyway please misinterpret what Ive written reach wrong conclusion Ill say again Flights both types controls can completely trouble-freebut flights highrate controls can much longer Period Bob Boucher just mentioned above strong believer competition example likes contest opposed fun fly likes design manufacture Astro products such competitive end use mind partic ular Bob can become very forceful comes international competition feelings run strong deep So does lament Bob tells hes very concerned about apparent lack interest throughout US model dom international Electric competition feels nation have much poorer showing such events theres excuse hear him talk matter can hum bling say least can tell up Bob US would soon become household word throughout world comes international Electric US team member names would become Continued page 151 July 1990 115 D&R P-51 H Sport Scale Mustang Rec Engine 000 ST 2 Stroke 1204 stroke Wing Span ing Area ox 1050 Weight 3 lbs Hardware $23900 Included plus shipping Fully Sheeted Almost Ready Cover PO Box 299 Gonzales TX 78629 512-672-7023 LIGHTING SYSTEMS THE ORIGINALS. Still Best #RED 01Programmable Flashing Navigation Lights$2495 #RED 02Adjustable Rate Strobe Light$1995 #RED 03Landing Lights$3995 # RED 04Adjustable Rate Mars Rotating Beacon$1995 #RED 05Marine Navigation Lights nonflashing$1095 #RED 14Big Airplane Navigation Lights$2495 #RED 16Econo Landing Lights brightest$1995 #RED 23Real Strobe Light true zenon strobe$2995 S SEE YOUR DEALER 0 SEND STAMPED ENVELOPE FOR RAM INFO If unavIlable locally send check money order full credit card info cost item plus $200 $500 foreign immediate shipment Include full address UPS Sorry no COD Ram 4736 N Milwaukee Ave ago IL 60630 aae White Laminating Epoxy & Fiberglass Strong tweight No Pin Holes tle e Construction dor RC Electrics/Kopski Continued page 115 household words well Bob feels future model aviation lies hobby becoming national sport associated major business aspects media implications course US domina tion international events would exist hand-inhand anxious promote kind thinking wants see sorts things hap pening Bob hinted might time dedicated Electric competition-oriented maga zine may indeed case did comment far can tell readers seem hobbyists flying Electric casually fun However did promise him Id try stir up sport-oriented and/or serious contest interest may latent among readers column Therefore am seriously requesting such inclinations please write Bob Boucher pronounced Boo-s/wy RMcM Astro Flight Inc 13311 Beach Ave Marina Del Rey CA 90292 tell im Bob sent ya Future columns will once again include some Electric basics Ive come realize monthly presentation has gradually strayed away area though intentionally Basics fact Model Aviation started its Electric coverage late 83 no matter what year-then nowthere always beginners seeking beginning information mind Ill once again cover some basic topics part future monthly installments wont forget experienced folks either Lets just say Ill strive balance Oh column longer now drizzly chilly April 1 Sunday afternoon have new electrified Sig Senior ita Im anxious fly So go out now After its first flight last Saturday snowstorm Folks Im hot fly Im hot fly Please direct comment question au thor address given column header Model Aviation editorial offices will reply correspondence accompanied SASE Happy quiet Electric landings everyonein rain snow whatever no matter what motor size RC Scale/Aune Continued page 45 Continue around circle using new mark derived through successive use tem plate new starting line until have five marks needed stars points Now slice straight lines connecting other point presto have mask star ready place model spray paint little 720 template will work size star up diameter 10 Scale math have calls people want know enlarge reduce scale detail using calculator problem cor rectly duplicating scale detail documenta tion model easily solved using ratioand-proportion math probably already know its worth going over dont method will take away guesswork invariably will pointed out some sharp judge things will need threecorner scale ruler calculator memo ry Such calculators available chain discount stores best kind have ap plication keeps its memory turned oft Make sure ruler has 60 fine marking scale will give highest resolution using small-sized documentation Heres go about task 1 Measure fuselage length plans model inches 2 Measure fuselage length docu mentation scale rulers 60 scale scale measurement 3 Find scale ratio calculator punch model inches press Divide key punch scale measurement press Equal key Put ratio calculators memory 4 Process a Press Memory Recall b Press X multiplication c Enter scale measurement 60 scale item documentation d Press l sign calculators screen will give direct readout actual inches model inches size item question example find model size round access panel top 76-in-span Bob Holman Corsair using Squadron/Signal pub lications documentation F4U Corsair Color following Press Memory Recall key 3 scale ra tio Multiply X 18 measured documentation using 60-scale ruler Continued page 154 July 1990 151
Edition: Model Aviation - 1990/07
Page Numbers: 42, 43, 110, 112, 115, 151
FIRST The Electric Connection Service now over half-year old quite few people have availed themselves opportunity find oth ers locale share fun Electric Any Electric modeler club interested attract ing attention since theres no engine noise can simply request writing Ill include name upcoming column Now must again ask somethingone time youve successful receiving response listing ECS please let know Otherwise might get idea ECS working Ill tempted use column space something else mind everyone please check out folks want meet up other locals share joy Electric Robert Osorlo 1903 Sans Souci Blvd N Miami FL 33181 Don Schneider PO Box 5441 Eugene OR 97405 tel 1-503/683-6301 Some Electric meets have announced cluding eighth annual Electric RC Fly-In spon sored Puget Sound Electric Model Fliers division Boeing Hawks RC Fliers meet scheduled June 23-24 Boeing Upgraded high-versatlilty gear box Ai Tec Products inc 18800 State Rt 47 East Sidney OH 45365 Package includes three gear ratios adapter plates can fit ted variety popuiar 05-size motors features heavy 3A-in shaft collet type prop adapter its $2995 pius postage Kent Space Center Field Kent WA meet offers prizes trophies Most Aerobatic Best Scale Longest Flight Most Impressive Best Multi-Motor plus special achievement awards addition AMA event 609 will flown info contact Bernard Cawley CD 29838 48th Ave S Auburn WA 98001 tel 1-206/839-9157 Ben Almojuela Asst CD 1941 6th Ave W Seattle WA 98119 tel 1-206/283-3407 third annual Electric fun-fly July 2122 sponsored Lehigh Valley Radio Control Society meet located near Easton PA offers events skill levels including Dura tion Aerobatics events open flying day day 100-acre facility 500ft grass runway info contact Ellis Grumer 321 Aurora St Phillipsburg NJ 08865 tel 1-201/859-0969 Tom Castellano tel 1215/759-6937 Finally same Sunday July 22 Northern Connecticut Radio Control Club NCRCC will hold Third Annual Electric Fly-In meet will feature Electric clinic Larry Sribnick SR Batteries Events include Handcrafted motor-mounting plate 040 aiuminum Paul Pickwick Louisville KY used rebuilding nose Electra after rapid earthrlse hope lessly modified models original plastic cowling motor mount components 42 Model Aviation Rado Control Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 THIS MONTHS TOPICS 1 Electric Connection Service plus request 2 Electric meets PSEMF LVRCS NCRCC 3 Reader response Topics box 4 Reader response motor size 5 Reader responsespeed control trou ble 6 Electric competitive sport 7 Coming up future columns Kopskl has Electrified Sig Seniorita geared Astro 24 14 1 200-mAh SCR NI-Cds All-up weight 84 oz poses snow just before its maiden flight March 24 nice gentle filer relaxation wing has modified two extra rib bays per panci other minor structural mods benefit Electric Guidance Airtronlcs RC modeier does significant amount soidering Ungar UTC 100 soldering sta tion offers controlled variabie temperature takes standard Ungar tipsjust like Radio Shack seiis Its own irons Bob found best price $5995 Edlie Eiectronics 2700 Hempstead Turnpike Levittown NY 117561443 tei 1-516/735-3330 Catalog #TA 6215-1 takes both Beth Ann Richard Affler back steady dad Roberts Willlngboro NJ electric-powered Dirty Birdy Pattern plane Power geared Astro 40 using 28 1 200-mAh Ni-Cd cells Juice metered Jomar SC-B big system controller re worked Zinger 105 x 75 prop blasts air 13000 rpm Bad news looks like plane photos John Prestons Safety Comes First column month seven-minute precision flight spot landing Pylon event Site NCRCC Ellington Field info contact Ronald Torrito 1625 Main St East Hartford CT 06108 tel 1203/528-2227 meets CD Larry Neal tel 1-203/537-4001 Topics box thats opening columns since January 90 issue has self brought reader reaction Ive received sev eral very favorable comments no negative ones reader thought MA column should adopt format Apparently feeling right Its often too hard find subject remember seeing somewhere Top ics box instituted help situation Thanks feedback folks Some reader response much-repeated What OHFIVE question generL alized motor size issue has finally come fact Ive received six letters two brothers Boucher reader Roy McGuck First Roland Boucher Leisure Elec tronics Roland proponent displace ment method categorizing speci1ring mo tort letter Roland reviews earliest As tro products part Astro early Sev enties describes first two products 10 25 former displace ment about 15cc produced torque about 10 in-oz 10000 rpm about 01 horsepower Thats about what 10-cu -in gas engine would Similarly 25 developed about 025 hp 10000 rpm volume about 18cc point Id like note displace ment used above means armature volume ie basically size motor armature Roland likens volume displaced reciprocating piston gas engine Roland goes describe evolution 05 beginning first Astro unit displacement about 95cc horsepower about 005 goes tell perContinued page 110 Special Fast Turnaround Now Available CALL Frequency Service ACe Cirrus EK Futaba Heathkit HobbyshaCk JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Ill Fly What Fix ARAMID izLKJUUULx-AU\A CABLE NON-METALLIC NON-CARBON NO STRETCHI ELIMINATE THE MAJOR CAUSE OF INTERFERENCE FROM CONTROL CABLES AND FLYING WIRES DUPONT KEVLAR 29 BRAIDED 12 OVER 2 DYED BLACK AND COATED FOR UV PROTECTION 200 POUND STRENGTH 20 FT/PACK T4w 44d46t 44Of JOMAR PRODUCIS 2028 KnightsbrIdge Dr 513-474-0985 Cinti OH 45244 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Blocks harmful ultraviolet radiation Attractive case included Wraparound frame fits comfortably over prescription glasses . Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available Clear shop work S1325 Amber overcast days & late afternoons S14~ Gray S14~ & Mirror S19~ sunny days CA Mask S1595 Paint Mask S2O~ member club hit prop blade thrown 60 engine close range lip blade struck Safely Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer Pikes Peak RC Club Prices include shipping handling PLLJ5 See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 ICont US Mississippi 1601 924-9640 /MC July 1990 43 Conversion $3500 Includes Crystals Certification SpectrumI Analyzers CalIbrated Test Instruments Large Inventory RIC Parts Crystals UPS US Mail Federal Express Used Mastercard Visa Accepted Send Large Self Addressed Envelope Brochures HERES HOW AMAZING BALSAPITE REDUCES BUBBLES AND SAGS Iron-on coverings tend stick surface balsa & other woods often leaving trapped air sagging coming unglued Balsarite IRON-ON liquid sinks COVERING deep wood s intermixes adhesive theWITH BALSARITE covering ironed No trapped air deep permanent adhesion Eliminates sagging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Coverite Monokote Solarfilm etc must use Balsarite takes gamble out covering iron-ons New Formula Film C 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA Radio Technique/Myers Continued page 85 cells did maintain 10-amp cur rent Instead current dropped instantly con tinuously Don Srull insisted cells inadequate job hand right tested some Sanyo N-800AR cells red la bel resistor pack batteries held 10-amp current five minutes fact showed over 900 mAh usable capacity moral dont right test dont get right test results story isnt finished Bob using four-cell 50-mAh pack receiver plane order save weight batteries obvi ously couldnt stand up load receiv er two servos Benson SC-i speed control ler idle current measured 20 mA jumped hundreds mAs servos moved 50-mAb pack exhausted itself before could flying told Bob thought receiver would run bet ter three-cell 175-mAh pack tried Weight critical performance Bobs small plane three-cell/175 pack weighed about same Bobs four-cell/SO pack RC system worked better flight performance still miserable got out oscilloscope looked mo tor current Thats discovered SC1 wasnt 100% motor current showed pulses duty cycle about 80% lit tle experimenting trouble traced back three-cell pack SC-i needs full-voltage pulses four-cell pack order reach 100% duty cycle three-cell/175 pack satis fled servos needs speed controller four-cell 100-mAh battery installed radio three-cell N 800AR battery Imp 30 motor plane flew very nicely What conclusion can drawn Ulti mately both problems faced same problem case trying draw far rated current Ni-Cd batteries you will lose termi nal voltage may able fully re cover rated capacity battery order find Out what really have must test under realistic conditions RC Electrics/Kopski Continued page 43 formance displacement-standardized 05 motors has increased over yearsin part driven interest RC carsand notes current Leisure 05 develops 300% power original Astro 05 con tinues feel its shame other pi oneers Electric flight failed recognize development displacement classes Elec tric motors would have provided stable market place similar development sizes Electric motors Fifty years ago AMA recog nized displacement method choice model airplane gas engines Lets join main stream model aviation establish some dis placement classes Electric motors Roland followed up first letter sec ond latter described 05 used Continued page 112 110 Model Aviation MOONEY 201 2 SCALE 70 SPAN 7 8 LBS ENG.40-6O2CYCLE 9O4CYCLE Machine Cut Parts Balsa Kit e Plans Approved3Views Complete Construction Manual Jig Built Flying Surfaces $13995 Complete Hardware p ng Ply Capped Cowl Wing Saddle & Surfaces Complete Decals YI order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio 44060 /216 953-1188 r 0 HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 ere proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP GUNFIGHTERS *POSITIVE FEELpr CA RES ADD *USED BY TOP PILOTS625% SALES TAX *FOR FUTABA AIRTRONICS JR OTHERS PLEASE SPECIFY RADIO OT Electrics SAM 49 over nine-year peri od somewhat involved story sum mary folks involved came agree upon use legal 05 having agreed-upon displacement also adopted specific mo tor run time specific battery Illegiti mate motors such some cobalts having ar mature greater volume part accommo dated shorter motor runs Bob Boucher Astro also wrote early days Electrics invented Electric flight mind would replace noisy greasy smelly glow engines types models started small trying replace OS Max o invented Electric system could swing 7 x 4 prop 12000 rpm just like OS Max Remember 1970 20 years ago Nowadays can better can 1990 cobalt 05 can bit much 1970 OS Max 10 So what Nothing ever stands still numerical size motors descriptive physical size amount torque produce same glow engines means turn same props roughly same rpm same letter follow-up Bob goes list some nomenclature used various sup pliers eg Astro 05 15 25 40 60 Keller 50 150 Graupner 600 900 1200 2000 includes some car motors Trinity Monster Insane theres Nuclear Assault Ninja Torque zilla onall aggressive names con vey idea killing competition also de scribes motor marketing RC car field has become numbers game sup plier highest advertised rpm gets lions share market Bob further notes real' cars have names also eg Lexus 400 BMW 375 Olds 98 cant really tell much descriptions Bobs point think may names mean little maybe shouldnt have interpreta tion part reinforced suggests ge readers become fluent jargon model motor trade Reader Roy MeGuckins Fairport NY two let ters suggest motor-rating system based way real electric motors rated NEMA national organization establishes stan dards rating methods industrial electric motors Such motors typically carry nameplate listing such basic info frame size horsepower volts/amps/watts rpm torque temperature rise duty class constant intermittent etc Having received Roys letter spoke friend works manufacturer small DC motorsnot unlike kind fly tells company its competitors es sentially own thing no common agreement among respect frame size physical size/shape mounting specification case dustrial motors would allow interchangeability among manufacturers However use other terms volts/amps/watts torque rpm etc makes sense can cer tainly accept developing standardized case/ mounting specifications model plane motors probably realistic expectation categoric ally reject thought some meaningful useContinued page 115 112 ModelAviation DLJ Especially formulated use gasoline diesel fuels Wont swell harden use new transparent green fuel line perfect fuel connections fuel pumps smoke systems Sold foot Medium TYGON Large local Hobby Shop gb-fuels sure use Du-Bros Neoprene Silicone fuel Tubing.the Modelers ChoiceFUEL DU-BRO PRODUCTS INC 480 BONNER RD WAUCONDA IL 60084TUBING D&J ELECTRONICS 900 Lucy Road ll Ml 48843 546-2644 service makes RIO equipment utilizing state art electronics Spectrum Analyzer Precision Frequency Measuring equipment True 1991 Standards endorsed AMA & RCMA Transmitter Slicker Program FCC LicensedSpeed Control RepairsQualIty ServIce Transmitter Checks Only includes GOLD/SILVER sticker$400 Transmitter & Receiver Calibration$2400 Frequency Upgrades & Changes crystals extra$2900 Bench Time Repairs per hour$2500 Transmitters service will receive AMA/RCMA sticker ADD $500 FOR SHIPPING & INSURANCE TURN AROUND TIME TWO WEEKS OR LESSII ACCEPTED ful nameplate info cant adopted label stan dard feel voltage cells maxi mum current before brushes/armature die prematurely rpm cause its nice know what expect prop watts input power properly propped cause way can re late what planes will perfectly reason able certainly useful nameplate parameters needed emotionalism 'killer names Now folks maybe am being unrealistic maybe unreasonable maybe Im missing real opportunity Perhaps should go busi ness produce size fits dynamite motor Ill call MASTODON technically demanding its really Ultra-Turbo HyperSubSpace Macro-Torque Mega Machine Ill give dry magnets made psuedo-neo-unobtainium will spin genetical ly refined activated molecular bearings shaft speed normally called rpm would prob ably about 97 kiloradians per microminute Yup sounds good Thats what Ill put label Plus words cars boats trains planes skateboards Ah long last motor thinking unthinking men women children household pets can first block render ex tinct others MASTODON will allow true killer really Oh What fun Now Ive poked little fun let refer April 90 issue RCM its Silent Power column friend column author Ted Davey offers some words about motor size batteries other things well Also want thank Roland Bob Roy taking time write two letters response search such input about rest Some readers have misunderstood discussion recent columns regarding differences tween frame-rate high-rate speed con trols has taken form reader input dicating ve no trouble frame-rate control am using would expect trouble Indeed Ive used several frame-rate controls have person ally no trouble can work just fineas far working goes Power systems frame-rate controls instead highrate controls have much worse power system ef ficiency control used other On/Off manner Im getting tired writing Anyway please misinterpret what Ive written reach wrong conclusion Ill say again Flights both types controls can completely trouble-freebut flights highrate controls can much longer Period Bob Boucher just mentioned above strong believer competition example likes contest opposed fun fly likes design manufacture Astro products such competitive end use mind partic ular Bob can become very forceful comes international competition feelings run strong deep So does lament Bob tells hes very concerned about apparent lack interest throughout US model dom international Electric competition feels nation have much poorer showing such events theres excuse hear him talk matter can hum bling say least can tell up Bob US would soon become household word throughout world comes international Electric US team member names would become Continued page 151 July 1990 115 D&R P-51 H Sport Scale Mustang Rec Engine 000 ST 2 Stroke 1204 stroke Wing Span ing Area ox 1050 Weight 3 lbs Hardware $23900 Included plus shipping Fully Sheeted Almost Ready Cover PO Box 299 Gonzales TX 78629 512-672-7023 LIGHTING SYSTEMS THE ORIGINALS. Still Best #RED 01Programmable Flashing Navigation Lights$2495 #RED 02Adjustable Rate Strobe Light$1995 #RED 03Landing Lights$3995 # RED 04Adjustable Rate Mars Rotating Beacon$1995 #RED 05Marine Navigation Lights nonflashing$1095 #RED 14Big Airplane Navigation Lights$2495 #RED 16Econo Landing Lights brightest$1995 #RED 23Real Strobe Light true zenon strobe$2995 S SEE YOUR DEALER 0 SEND STAMPED ENVELOPE FOR RAM INFO If unavIlable locally send check money order full credit card info cost item plus $200 $500 foreign immediate shipment Include full address UPS Sorry no COD Ram 4736 N Milwaukee Ave ago IL 60630 aae White Laminating Epoxy & Fiberglass Strong tweight No Pin Holes tle e Construction dor RC Electrics/Kopski Continued page 115 household words well Bob feels future model aviation lies hobby becoming national sport associated major business aspects media implications course US domina tion international events would exist hand-inhand anxious promote kind thinking wants see sorts things hap pening Bob hinted might time dedicated Electric competition-oriented maga zine may indeed case did comment far can tell readers seem hobbyists flying Electric casually fun However did promise him Id try stir up sport-oriented and/or serious contest interest may latent among readers column Therefore am seriously requesting such inclinations please write Bob Boucher pronounced Boo-s/wy RMcM Astro Flight Inc 13311 Beach Ave Marina Del Rey CA 90292 tell im Bob sent ya Future columns will once again include some Electric basics Ive come realize monthly presentation has gradually strayed away area though intentionally Basics fact Model Aviation started its Electric coverage late 83 no matter what year-then nowthere always beginners seeking beginning information mind Ill once again cover some basic topics part future monthly installments wont forget experienced folks either Lets just say Ill strive balance Oh column longer now drizzly chilly April 1 Sunday afternoon have new electrified Sig Senior ita Im anxious fly So go out now After its first flight last Saturday snowstorm Folks Im hot fly Im hot fly Please direct comment question au thor address given column header Model Aviation editorial offices will reply correspondence accompanied SASE Happy quiet Electric landings everyonein rain snow whatever no matter what motor size RC Scale/Aune Continued page 45 Continue around circle using new mark derived through successive use tem plate new starting line until have five marks needed stars points Now slice straight lines connecting other point presto have mask star ready place model spray paint little 720 template will work size star up diameter 10 Scale math have calls people want know enlarge reduce scale detail using calculator problem cor rectly duplicating scale detail documenta tion model easily solved using ratioand-proportion math probably already know its worth going over dont method will take away guesswork invariably will pointed out some sharp judge things will need threecorner scale ruler calculator memo ry Such calculators available chain discount stores best kind have ap plication keeps its memory turned oft Make sure ruler has 60 fine marking scale will give highest resolution using small-sized documentation Heres go about task 1 Measure fuselage length plans model inches 2 Measure fuselage length docu mentation scale rulers 60 scale scale measurement 3 Find scale ratio calculator punch model inches press Divide key punch scale measurement press Equal key Put ratio calculators memory 4 Process a Press Memory Recall b Press X multiplication c Enter scale measurement 60 scale item documentation d Press l sign calculators screen will give direct readout actual inches model inches size item question example find model size round access panel top 76-in-span Bob Holman Corsair using Squadron/Signal pub lications documentation F4U Corsair Color following Press Memory Recall key 3 scale ra tio Multiply X 18 measured documentation using 60-scale ruler Continued page 154 July 1990 151
Edition: Model Aviation - 1990/07
Page Numbers: 42, 43, 110, 112, 115, 151
FIRST The Electric Connection Service now over half-year old quite few people have availed themselves opportunity find oth ers locale share fun Electric Any Electric modeler club interested attract ing attention since theres no engine noise can simply request writing Ill include name upcoming column Now must again ask somethingone time youve successful receiving response listing ECS please let know Otherwise might get idea ECS working Ill tempted use column space something else mind everyone please check out folks want meet up other locals share joy Electric Robert Osorlo 1903 Sans Souci Blvd N Miami FL 33181 Don Schneider PO Box 5441 Eugene OR 97405 tel 1-503/683-6301 Some Electric meets have announced cluding eighth annual Electric RC Fly-In spon sored Puget Sound Electric Model Fliers division Boeing Hawks RC Fliers meet scheduled June 23-24 Boeing Upgraded high-versatlilty gear box Ai Tec Products inc 18800 State Rt 47 East Sidney OH 45365 Package includes three gear ratios adapter plates can fit ted variety popuiar 05-size motors features heavy 3A-in shaft collet type prop adapter its $2995 pius postage Kent Space Center Field Kent WA meet offers prizes trophies Most Aerobatic Best Scale Longest Flight Most Impressive Best Multi-Motor plus special achievement awards addition AMA event 609 will flown info contact Bernard Cawley CD 29838 48th Ave S Auburn WA 98001 tel 1-206/839-9157 Ben Almojuela Asst CD 1941 6th Ave W Seattle WA 98119 tel 1-206/283-3407 third annual Electric fun-fly July 2122 sponsored Lehigh Valley Radio Control Society meet located near Easton PA offers events skill levels including Dura tion Aerobatics events open flying day day 100-acre facility 500ft grass runway info contact Ellis Grumer 321 Aurora St Phillipsburg NJ 08865 tel 1-201/859-0969 Tom Castellano tel 1215/759-6937 Finally same Sunday July 22 Northern Connecticut Radio Control Club NCRCC will hold Third Annual Electric Fly-In meet will feature Electric clinic Larry Sribnick SR Batteries Events include Handcrafted motor-mounting plate 040 aiuminum Paul Pickwick Louisville KY used rebuilding nose Electra after rapid earthrlse hope lessly modified models original plastic cowling motor mount components 42 Model Aviation Rado Control Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 THIS MONTHS TOPICS 1 Electric Connection Service plus request 2 Electric meets PSEMF LVRCS NCRCC 3 Reader response Topics box 4 Reader response motor size 5 Reader responsespeed control trou ble 6 Electric competitive sport 7 Coming up future columns Kopskl has Electrified Sig Seniorita geared Astro 24 14 1 200-mAh SCR NI-Cds All-up weight 84 oz poses snow just before its maiden flight March 24 nice gentle filer relaxation wing has modified two extra rib bays per panci other minor structural mods benefit Electric Guidance Airtronlcs RC modeier does significant amount soidering Ungar UTC 100 soldering sta tion offers controlled variabie temperature takes standard Ungar tipsjust like Radio Shack seiis Its own irons Bob found best price $5995 Edlie Eiectronics 2700 Hempstead Turnpike Levittown NY 117561443 tei 1-516/735-3330 Catalog #TA 6215-1 takes both Beth Ann Richard Affler back steady dad Roberts Willlngboro NJ electric-powered Dirty Birdy Pattern plane Power geared Astro 40 using 28 1 200-mAh Ni-Cd cells Juice metered Jomar SC-B big system controller re worked Zinger 105 x 75 prop blasts air 13000 rpm Bad news looks like plane photos John Prestons Safety Comes First column month seven-minute precision flight spot landing Pylon event Site NCRCC Ellington Field info contact Ronald Torrito 1625 Main St East Hartford CT 06108 tel 1203/528-2227 meets CD Larry Neal tel 1-203/537-4001 Topics box thats opening columns since January 90 issue has self brought reader reaction Ive received sev eral very favorable comments no negative ones reader thought MA column should adopt format Apparently feeling right Its often too hard find subject remember seeing somewhere Top ics box instituted help situation Thanks feedback folks Some reader response much-repeated What OHFIVE question generL alized motor size issue has finally come fact Ive received six letters two brothers Boucher reader Roy McGuck First Roland Boucher Leisure Elec tronics Roland proponent displace ment method categorizing speci1ring mo tort letter Roland reviews earliest As tro products part Astro early Sev enties describes first two products 10 25 former displace ment about 15cc produced torque about 10 in-oz 10000 rpm about 01 horsepower Thats about what 10-cu -in gas engine would Similarly 25 developed about 025 hp 10000 rpm volume about 18cc point Id like note displace ment used above means armature volume ie basically size motor armature Roland likens volume displaced reciprocating piston gas engine Roland goes describe evolution 05 beginning first Astro unit displacement about 95cc horsepower about 005 goes tell perContinued page 110 Special Fast Turnaround Now Available CALL Frequency Service ACe Cirrus EK Futaba Heathkit HobbyshaCk JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Ill Fly What Fix ARAMID izLKJUUULx-AU\A CABLE NON-METALLIC NON-CARBON NO STRETCHI ELIMINATE THE MAJOR CAUSE OF INTERFERENCE FROM CONTROL CABLES AND FLYING WIRES DUPONT KEVLAR 29 BRAIDED 12 OVER 2 DYED BLACK AND COATED FOR UV PROTECTION 200 POUND STRENGTH 20 FT/PACK T4w 44d46t 44Of JOMAR PRODUCIS 2028 KnightsbrIdge Dr 513-474-0985 Cinti OH 45244 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Blocks harmful ultraviolet radiation Attractive case included Wraparound frame fits comfortably over prescription glasses . Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available Clear shop work S1325 Amber overcast days & late afternoons S14~ Gray S14~ & Mirror S19~ sunny days CA Mask S1595 Paint Mask S2O~ member club hit prop blade thrown 60 engine close range lip blade struck Safely Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer Pikes Peak RC Club Prices include shipping handling PLLJ5 See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 ICont US Mississippi 1601 924-9640 /MC July 1990 43 Conversion $3500 Includes Crystals Certification SpectrumI Analyzers CalIbrated Test Instruments Large Inventory RIC Parts Crystals UPS US Mail Federal Express Used Mastercard Visa Accepted Send Large Self Addressed Envelope Brochures HERES HOW AMAZING BALSAPITE REDUCES BUBBLES AND SAGS Iron-on coverings tend stick surface balsa & other woods often leaving trapped air sagging coming unglued Balsarite IRON-ON liquid sinks COVERING deep wood s intermixes adhesive theWITH BALSARITE covering ironed No trapped air deep permanent adhesion Eliminates sagging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Coverite Monokote Solarfilm etc must use Balsarite takes gamble out covering iron-ons New Formula Film C 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA Radio Technique/Myers Continued page 85 cells did maintain 10-amp cur rent Instead current dropped instantly con tinuously Don Srull insisted cells inadequate job hand right tested some Sanyo N-800AR cells red la bel resistor pack batteries held 10-amp current five minutes fact showed over 900 mAh usable capacity moral dont right test dont get right test results story isnt finished Bob using four-cell 50-mAh pack receiver plane order save weight batteries obvi ously couldnt stand up load receiv er two servos Benson SC-i speed control ler idle current measured 20 mA jumped hundreds mAs servos moved 50-mAb pack exhausted itself before could flying told Bob thought receiver would run bet ter three-cell 175-mAh pack tried Weight critical performance Bobs small plane three-cell/175 pack weighed about same Bobs four-cell/SO pack RC system worked better flight performance still miserable got out oscilloscope looked mo tor current Thats discovered SC1 wasnt 100% motor current showed pulses duty cycle about 80% lit tle experimenting trouble traced back three-cell pack SC-i needs full-voltage pulses four-cell pack order reach 100% duty cycle three-cell/175 pack satis fled servos needs speed controller four-cell 100-mAh battery installed radio three-cell N 800AR battery Imp 30 motor plane flew very nicely What conclusion can drawn Ulti mately both problems faced same problem case trying draw far rated current Ni-Cd batteries you will lose termi nal voltage may able fully re cover rated capacity battery order find Out what really have must test under realistic conditions RC Electrics/Kopski Continued page 43 formance displacement-standardized 05 motors has increased over yearsin part driven interest RC carsand notes current Leisure 05 develops 300% power original Astro 05 con tinues feel its shame other pi oneers Electric flight failed recognize development displacement classes Elec tric motors would have provided stable market place similar development sizes Electric motors Fifty years ago AMA recog nized displacement method choice model airplane gas engines Lets join main stream model aviation establish some dis placement classes Electric motors Roland followed up first letter sec ond latter described 05 used Continued page 112 110 Model Aviation MOONEY 201 2 SCALE 70 SPAN 7 8 LBS ENG.40-6O2CYCLE 9O4CYCLE Machine Cut Parts Balsa Kit e Plans Approved3Views Complete Construction Manual Jig Built Flying Surfaces $13995 Complete Hardware p ng Ply Capped Cowl Wing Saddle & Surfaces Complete Decals YI order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio 44060 /216 953-1188 r 0 HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 ere proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP GUNFIGHTERS *POSITIVE FEELpr CA RES ADD *USED BY TOP PILOTS625% SALES TAX *FOR FUTABA AIRTRONICS JR OTHERS PLEASE SPECIFY RADIO OT Electrics SAM 49 over nine-year peri od somewhat involved story sum mary folks involved came agree upon use legal 05 having agreed-upon displacement also adopted specific mo tor run time specific battery Illegiti mate motors such some cobalts having ar mature greater volume part accommo dated shorter motor runs Bob Boucher Astro also wrote early days Electrics invented Electric flight mind would replace noisy greasy smelly glow engines types models started small trying replace OS Max o invented Electric system could swing 7 x 4 prop 12000 rpm just like OS Max Remember 1970 20 years ago Nowadays can better can 1990 cobalt 05 can bit much 1970 OS Max 10 So what Nothing ever stands still numerical size motors descriptive physical size amount torque produce same glow engines means turn same props roughly same rpm same letter follow-up Bob goes list some nomenclature used various sup pliers eg Astro 05 15 25 40 60 Keller 50 150 Graupner 600 900 1200 2000 includes some car motors Trinity Monster Insane theres Nuclear Assault Ninja Torque zilla onall aggressive names con vey idea killing competition also de scribes motor marketing RC car field has become numbers game sup plier highest advertised rpm gets lions share market Bob further notes real' cars have names also eg Lexus 400 BMW 375 Olds 98 cant really tell much descriptions Bobs point think may names mean little maybe shouldnt have interpreta tion part reinforced suggests ge readers become fluent jargon model motor trade Reader Roy MeGuckins Fairport NY two let ters suggest motor-rating system based way real electric motors rated NEMA national organization establishes stan dards rating methods industrial electric motors Such motors typically carry nameplate listing such basic info frame size horsepower volts/amps/watts rpm torque temperature rise duty class constant intermittent etc Having received Roys letter spoke friend works manufacturer small DC motorsnot unlike kind fly tells company its competitors es sentially own thing no common agreement among respect frame size physical size/shape mounting specification case dustrial motors would allow interchangeability among manufacturers However use other terms volts/amps/watts torque rpm etc makes sense can cer tainly accept developing standardized case/ mounting specifications model plane motors probably realistic expectation categoric ally reject thought some meaningful useContinued page 115 112 ModelAviation DLJ Especially formulated use gasoline diesel fuels Wont swell harden use new transparent green fuel line perfect fuel connections fuel pumps smoke systems Sold foot Medium TYGON Large local Hobby Shop gb-fuels sure use Du-Bros Neoprene Silicone fuel Tubing.the Modelers ChoiceFUEL DU-BRO PRODUCTS INC 480 BONNER RD WAUCONDA IL 60084TUBING D&J ELECTRONICS 900 Lucy Road ll Ml 48843 546-2644 service makes RIO equipment utilizing state art electronics Spectrum Analyzer Precision Frequency Measuring equipment True 1991 Standards endorsed AMA & RCMA Transmitter Slicker Program FCC LicensedSpeed Control RepairsQualIty ServIce Transmitter Checks Only includes GOLD/SILVER sticker$400 Transmitter & Receiver Calibration$2400 Frequency Upgrades & Changes crystals extra$2900 Bench Time Repairs per hour$2500 Transmitters service will receive AMA/RCMA sticker ADD $500 FOR SHIPPING & INSURANCE TURN AROUND TIME TWO WEEKS OR LESSII ACCEPTED ful nameplate info cant adopted label stan dard feel voltage cells maxi mum current before brushes/armature die prematurely rpm cause its nice know what expect prop watts input power properly propped cause way can re late what planes will perfectly reason able certainly useful nameplate parameters needed emotionalism 'killer names Now folks maybe am being unrealistic maybe unreasonable maybe Im missing real opportunity Perhaps should go busi ness produce size fits dynamite motor Ill call MASTODON technically demanding its really Ultra-Turbo HyperSubSpace Macro-Torque Mega Machine Ill give dry magnets made psuedo-neo-unobtainium will spin genetical ly refined activated molecular bearings shaft speed normally called rpm would prob ably about 97 kiloradians per microminute Yup sounds good Thats what Ill put label Plus words cars boats trains planes skateboards Ah long last motor thinking unthinking men women children household pets can first block render ex tinct others MASTODON will allow true killer really Oh What fun Now Ive poked little fun let refer April 90 issue RCM its Silent Power column friend column author Ted Davey offers some words about motor size batteries other things well Also want thank Roland Bob Roy taking time write two letters response search such input about rest Some readers have misunderstood discussion recent columns regarding differences tween frame-rate high-rate speed con trols has taken form reader input dicating ve no trouble frame-rate control am using would expect trouble Indeed Ive used several frame-rate controls have person ally no trouble can work just fineas far working goes Power systems frame-rate controls instead highrate controls have much worse power system ef ficiency control used other On/Off manner Im getting tired writing Anyway please misinterpret what Ive written reach wrong conclusion Ill say again Flights both types controls can completely trouble-freebut flights highrate controls can much longer Period Bob Boucher just mentioned above strong believer competition example likes contest opposed fun fly likes design manufacture Astro products such competitive end use mind partic ular Bob can become very forceful comes international competition feelings run strong deep So does lament Bob tells hes very concerned about apparent lack interest throughout US model dom international Electric competition feels nation have much poorer showing such events theres excuse hear him talk matter can hum bling say least can tell up Bob US would soon become household word throughout world comes international Electric US team member names would become Continued page 151 July 1990 115 D&R P-51 H Sport Scale Mustang Rec Engine 000 ST 2 Stroke 1204 stroke Wing Span ing Area ox 1050 Weight 3 lbs Hardware $23900 Included plus shipping Fully Sheeted Almost Ready Cover PO Box 299 Gonzales TX 78629 512-672-7023 LIGHTING SYSTEMS THE ORIGINALS. Still Best #RED 01Programmable Flashing Navigation Lights$2495 #RED 02Adjustable Rate Strobe Light$1995 #RED 03Landing Lights$3995 # RED 04Adjustable Rate Mars Rotating Beacon$1995 #RED 05Marine Navigation Lights nonflashing$1095 #RED 14Big Airplane Navigation Lights$2495 #RED 16Econo Landing Lights brightest$1995 #RED 23Real Strobe Light true zenon strobe$2995 S SEE YOUR DEALER 0 SEND STAMPED ENVELOPE FOR RAM INFO If unavIlable locally send check money order full credit card info cost item plus $200 $500 foreign immediate shipment Include full address UPS Sorry no COD Ram 4736 N Milwaukee Ave ago IL 60630 aae White Laminating Epoxy & Fiberglass Strong tweight No Pin Holes tle e Construction dor RC Electrics/Kopski Continued page 115 household words well Bob feels future model aviation lies hobby becoming national sport associated major business aspects media implications course US domina tion international events would exist hand-inhand anxious promote kind thinking wants see sorts things hap pening Bob hinted might time dedicated Electric competition-oriented maga zine may indeed case did comment far can tell readers seem hobbyists flying Electric casually fun However did promise him Id try stir up sport-oriented and/or serious contest interest may latent among readers column Therefore am seriously requesting such inclinations please write Bob Boucher pronounced Boo-s/wy RMcM Astro Flight Inc 13311 Beach Ave Marina Del Rey CA 90292 tell im Bob sent ya Future columns will once again include some Electric basics Ive come realize monthly presentation has gradually strayed away area though intentionally Basics fact Model Aviation started its Electric coverage late 83 no matter what year-then nowthere always beginners seeking beginning information mind Ill once again cover some basic topics part future monthly installments wont forget experienced folks either Lets just say Ill strive balance Oh column longer now drizzly chilly April 1 Sunday afternoon have new electrified Sig Senior ita Im anxious fly So go out now After its first flight last Saturday snowstorm Folks Im hot fly Im hot fly Please direct comment question au thor address given column header Model Aviation editorial offices will reply correspondence accompanied SASE Happy quiet Electric landings everyonein rain snow whatever no matter what motor size RC Scale/Aune Continued page 45 Continue around circle using new mark derived through successive use tem plate new starting line until have five marks needed stars points Now slice straight lines connecting other point presto have mask star ready place model spray paint little 720 template will work size star up diameter 10 Scale math have calls people want know enlarge reduce scale detail using calculator problem cor rectly duplicating scale detail documenta tion model easily solved using ratioand-proportion math probably already know its worth going over dont method will take away guesswork invariably will pointed out some sharp judge things will need threecorner scale ruler calculator memo ry Such calculators available chain discount stores best kind have ap plication keeps its memory turned oft Make sure ruler has 60 fine marking scale will give highest resolution using small-sized documentation Heres go about task 1 Measure fuselage length plans model inches 2 Measure fuselage length docu mentation scale rulers 60 scale scale measurement 3 Find scale ratio calculator punch model inches press Divide key punch scale measurement press Equal key Put ratio calculators memory 4 Process a Press Memory Recall b Press X multiplication c Enter scale measurement 60 scale item documentation d Press l sign calculators screen will give direct readout actual inches model inches size item question example find model size round access panel top 76-in-span Bob Holman Corsair using Squadron/Signal pub lications documentation F4U Corsair Color following Press Memory Recall key 3 scale ra tio Multiply X 18 measured documentation using 60-scale ruler Continued page 154 July 1990 151
Edition: Model Aviation - 1990/07
Page Numbers: 42, 43, 110, 112, 115, 151
FIRST The Electric Connection Service now over half-year old quite few people have availed themselves opportunity find oth ers locale share fun Electric Any Electric modeler club interested attract ing attention since theres no engine noise can simply request writing Ill include name upcoming column Now must again ask somethingone time youve successful receiving response listing ECS please let know Otherwise might get idea ECS working Ill tempted use column space something else mind everyone please check out folks want meet up other locals share joy Electric Robert Osorlo 1903 Sans Souci Blvd N Miami FL 33181 Don Schneider PO Box 5441 Eugene OR 97405 tel 1-503/683-6301 Some Electric meets have announced cluding eighth annual Electric RC Fly-In spon sored Puget Sound Electric Model Fliers division Boeing Hawks RC Fliers meet scheduled June 23-24 Boeing Upgraded high-versatlilty gear box Ai Tec Products inc 18800 State Rt 47 East Sidney OH 45365 Package includes three gear ratios adapter plates can fit ted variety popuiar 05-size motors features heavy 3A-in shaft collet type prop adapter its $2995 pius postage Kent Space Center Field Kent WA meet offers prizes trophies Most Aerobatic Best Scale Longest Flight Most Impressive Best Multi-Motor plus special achievement awards addition AMA event 609 will flown info contact Bernard Cawley CD 29838 48th Ave S Auburn WA 98001 tel 1-206/839-9157 Ben Almojuela Asst CD 1941 6th Ave W Seattle WA 98119 tel 1-206/283-3407 third annual Electric fun-fly July 2122 sponsored Lehigh Valley Radio Control Society meet located near Easton PA offers events skill levels including Dura tion Aerobatics events open flying day day 100-acre facility 500ft grass runway info contact Ellis Grumer 321 Aurora St Phillipsburg NJ 08865 tel 1-201/859-0969 Tom Castellano tel 1215/759-6937 Finally same Sunday July 22 Northern Connecticut Radio Control Club NCRCC will hold Third Annual Electric Fly-In meet will feature Electric clinic Larry Sribnick SR Batteries Events include Handcrafted motor-mounting plate 040 aiuminum Paul Pickwick Louisville KY used rebuilding nose Electra after rapid earthrlse hope lessly modified models original plastic cowling motor mount components 42 Model Aviation Rado Control Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 THIS MONTHS TOPICS 1 Electric Connection Service plus request 2 Electric meets PSEMF LVRCS NCRCC 3 Reader response Topics box 4 Reader response motor size 5 Reader responsespeed control trou ble 6 Electric competitive sport 7 Coming up future columns Kopskl has Electrified Sig Seniorita geared Astro 24 14 1 200-mAh SCR NI-Cds All-up weight 84 oz poses snow just before its maiden flight March 24 nice gentle filer relaxation wing has modified two extra rib bays per panci other minor structural mods benefit Electric Guidance Airtronlcs RC modeier does significant amount soidering Ungar UTC 100 soldering sta tion offers controlled variabie temperature takes standard Ungar tipsjust like Radio Shack seiis Its own irons Bob found best price $5995 Edlie Eiectronics 2700 Hempstead Turnpike Levittown NY 117561443 tei 1-516/735-3330 Catalog #TA 6215-1 takes both Beth Ann Richard Affler back steady dad Roberts Willlngboro NJ electric-powered Dirty Birdy Pattern plane Power geared Astro 40 using 28 1 200-mAh Ni-Cd cells Juice metered Jomar SC-B big system controller re worked Zinger 105 x 75 prop blasts air 13000 rpm Bad news looks like plane photos John Prestons Safety Comes First column month seven-minute precision flight spot landing Pylon event Site NCRCC Ellington Field info contact Ronald Torrito 1625 Main St East Hartford CT 06108 tel 1203/528-2227 meets CD Larry Neal tel 1-203/537-4001 Topics box thats opening columns since January 90 issue has self brought reader reaction Ive received sev eral very favorable comments no negative ones reader thought MA column should adopt format Apparently feeling right Its often too hard find subject remember seeing somewhere Top ics box instituted help situation Thanks feedback folks Some reader response much-repeated What OHFIVE question generL alized motor size issue has finally come fact Ive received six letters two brothers Boucher reader Roy McGuck First Roland Boucher Leisure Elec tronics Roland proponent displace ment method categorizing speci1ring mo tort letter Roland reviews earliest As tro products part Astro early Sev enties describes first two products 10 25 former displace ment about 15cc produced torque about 10 in-oz 10000 rpm about 01 horsepower Thats about what 10-cu -in gas engine would Similarly 25 developed about 025 hp 10000 rpm volume about 18cc point Id like note displace ment used above means armature volume ie basically size motor armature Roland likens volume displaced reciprocating piston gas engine Roland goes describe evolution 05 beginning first Astro unit displacement about 95cc horsepower about 005 goes tell perContinued page 110 Special Fast Turnaround Now Available CALL Frequency Service ACe Cirrus EK Futaba Heathkit HobbyshaCk JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Ill Fly What Fix ARAMID izLKJUUULx-AU\A CABLE NON-METALLIC NON-CARBON NO STRETCHI ELIMINATE THE MAJOR CAUSE OF INTERFERENCE FROM CONTROL CABLES AND FLYING WIRES DUPONT KEVLAR 29 BRAIDED 12 OVER 2 DYED BLACK AND COATED FOR UV PROTECTION 200 POUND STRENGTH 20 FT/PACK T4w 44d46t 44Of JOMAR PRODUCIS 2028 KnightsbrIdge Dr 513-474-0985 Cinti OH 45244 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Blocks harmful ultraviolet radiation Attractive case included Wraparound frame fits comfortably over prescription glasses . Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available Clear shop work S1325 Amber overcast days & late afternoons S14~ Gray S14~ & Mirror S19~ sunny days CA Mask S1595 Paint Mask S2O~ member club hit prop blade thrown 60 engine close range lip blade struck Safely Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer Pikes Peak RC Club Prices include shipping handling PLLJ5 See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 ICont US Mississippi 1601 924-9640 /MC July 1990 43 Conversion $3500 Includes Crystals Certification SpectrumI Analyzers CalIbrated Test Instruments Large Inventory RIC Parts Crystals UPS US Mail Federal Express Used Mastercard Visa Accepted Send Large Self Addressed Envelope Brochures HERES HOW AMAZING BALSAPITE REDUCES BUBBLES AND SAGS Iron-on coverings tend stick surface balsa & other woods often leaving trapped air sagging coming unglued Balsarite IRON-ON liquid sinks COVERING deep wood s intermixes adhesive theWITH BALSARITE covering ironed No trapped air deep permanent adhesion Eliminates sagging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Coverite Monokote Solarfilm etc must use Balsarite takes gamble out covering iron-ons New Formula Film C 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA Radio Technique/Myers Continued page 85 cells did maintain 10-amp cur rent Instead current dropped instantly con tinuously Don Srull insisted cells inadequate job hand right tested some Sanyo N-800AR cells red la bel resistor pack batteries held 10-amp current five minutes fact showed over 900 mAh usable capacity moral dont right test dont get right test results story isnt finished Bob using four-cell 50-mAh pack receiver plane order save weight batteries obvi ously couldnt stand up load receiv er two servos Benson SC-i speed control ler idle current measured 20 mA jumped hundreds mAs servos moved 50-mAb pack exhausted itself before could flying told Bob thought receiver would run bet ter three-cell 175-mAh pack tried Weight critical performance Bobs small plane three-cell/175 pack weighed about same Bobs four-cell/SO pack RC system worked better flight performance still miserable got out oscilloscope looked mo tor current Thats discovered SC1 wasnt 100% motor current showed pulses duty cycle about 80% lit tle experimenting trouble traced back three-cell pack SC-i needs full-voltage pulses four-cell pack order reach 100% duty cycle three-cell/175 pack satis fled servos needs speed controller four-cell 100-mAh battery installed radio three-cell N 800AR battery Imp 30 motor plane flew very nicely What conclusion can drawn Ulti mately both problems faced same problem case trying draw far rated current Ni-Cd batteries you will lose termi nal voltage may able fully re cover rated capacity battery order find Out what really have must test under realistic conditions RC Electrics/Kopski Continued page 43 formance displacement-standardized 05 motors has increased over yearsin part driven interest RC carsand notes current Leisure 05 develops 300% power original Astro 05 con tinues feel its shame other pi oneers Electric flight failed recognize development displacement classes Elec tric motors would have provided stable market place similar development sizes Electric motors Fifty years ago AMA recog nized displacement method choice model airplane gas engines Lets join main stream model aviation establish some dis placement classes Electric motors Roland followed up first letter sec ond latter described 05 used Continued page 112 110 Model Aviation MOONEY 201 2 SCALE 70 SPAN 7 8 LBS ENG.40-6O2CYCLE 9O4CYCLE Machine Cut Parts Balsa Kit e Plans Approved3Views Complete Construction Manual Jig Built Flying Surfaces $13995 Complete Hardware p ng Ply Capped Cowl Wing Saddle & Surfaces Complete Decals YI order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio 44060 /216 953-1188 r 0 HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 ere proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP GUNFIGHTERS *POSITIVE FEELpr CA RES ADD *USED BY TOP PILOTS625% SALES TAX *FOR FUTABA AIRTRONICS JR OTHERS PLEASE SPECIFY RADIO OT Electrics SAM 49 over nine-year peri od somewhat involved story sum mary folks involved came agree upon use legal 05 having agreed-upon displacement also adopted specific mo tor run time specific battery Illegiti mate motors such some cobalts having ar mature greater volume part accommo dated shorter motor runs Bob Boucher Astro also wrote early days Electrics invented Electric flight mind would replace noisy greasy smelly glow engines types models started small trying replace OS Max o invented Electric system could swing 7 x 4 prop 12000 rpm just like OS Max Remember 1970 20 years ago Nowadays can better can 1990 cobalt 05 can bit much 1970 OS Max 10 So what Nothing ever stands still numerical size motors descriptive physical size amount torque produce same glow engines means turn same props roughly same rpm same letter follow-up Bob goes list some nomenclature used various sup pliers eg Astro 05 15 25 40 60 Keller 50 150 Graupner 600 900 1200 2000 includes some car motors Trinity Monster Insane theres Nuclear Assault Ninja Torque zilla onall aggressive names con vey idea killing competition also de scribes motor marketing RC car field has become numbers game sup plier highest advertised rpm gets lions share market Bob further notes real' cars have names also eg Lexus 400 BMW 375 Olds 98 cant really tell much descriptions Bobs point think may names mean little maybe shouldnt have interpreta tion part reinforced suggests ge readers become fluent jargon model motor trade Reader Roy MeGuckins Fairport NY two let ters suggest motor-rating system based way real electric motors rated NEMA national organization establishes stan dards rating methods industrial electric motors Such motors typically carry nameplate listing such basic info frame size horsepower volts/amps/watts rpm torque temperature rise duty class constant intermittent etc Having received Roys letter spoke friend works manufacturer small DC motorsnot unlike kind fly tells company its competitors es sentially own thing no common agreement among respect frame size physical size/shape mounting specification case dustrial motors would allow interchangeability among manufacturers However use other terms volts/amps/watts torque rpm etc makes sense can cer tainly accept developing standardized case/ mounting specifications model plane motors probably realistic expectation categoric ally reject thought some meaningful useContinued page 115 112 ModelAviation DLJ Especially formulated use gasoline diesel fuels Wont swell harden use new transparent green fuel line perfect fuel connections fuel pumps smoke systems Sold foot Medium TYGON Large local Hobby Shop gb-fuels sure use Du-Bros Neoprene Silicone fuel Tubing.the Modelers ChoiceFUEL DU-BRO PRODUCTS INC 480 BONNER RD WAUCONDA IL 60084TUBING D&J ELECTRONICS 900 Lucy Road ll Ml 48843 546-2644 service makes RIO equipment utilizing state art electronics Spectrum Analyzer Precision Frequency Measuring equipment True 1991 Standards endorsed AMA & RCMA Transmitter Slicker Program FCC LicensedSpeed Control RepairsQualIty ServIce Transmitter Checks Only includes GOLD/SILVER sticker$400 Transmitter & Receiver Calibration$2400 Frequency Upgrades & Changes crystals extra$2900 Bench Time Repairs per hour$2500 Transmitters service will receive AMA/RCMA sticker ADD $500 FOR SHIPPING & INSURANCE TURN AROUND TIME TWO WEEKS OR LESSII ACCEPTED ful nameplate info cant adopted label stan dard feel voltage cells maxi mum current before brushes/armature die prematurely rpm cause its nice know what expect prop watts input power properly propped cause way can re late what planes will perfectly reason able certainly useful nameplate parameters needed emotionalism 'killer names Now folks maybe am being unrealistic maybe unreasonable maybe Im missing real opportunity Perhaps should go busi ness produce size fits dynamite motor Ill call MASTODON technically demanding its really Ultra-Turbo HyperSubSpace Macro-Torque Mega Machine Ill give dry magnets made psuedo-neo-unobtainium will spin genetical ly refined activated molecular bearings shaft speed normally called rpm would prob ably about 97 kiloradians per microminute Yup sounds good Thats what Ill put label Plus words cars boats trains planes skateboards Ah long last motor thinking unthinking men women children household pets can first block render ex tinct others MASTODON will allow true killer really Oh What fun Now Ive poked little fun let refer April 90 issue RCM its Silent Power column friend column author Ted Davey offers some words about motor size batteries other things well Also want thank Roland Bob Roy taking time write two letters response search such input about rest Some readers have misunderstood discussion recent columns regarding differences tween frame-rate high-rate speed con trols has taken form reader input dicating ve no trouble frame-rate control am using would expect trouble Indeed Ive used several frame-rate controls have person ally no trouble can work just fineas far working goes Power systems frame-rate controls instead highrate controls have much worse power system ef ficiency control used other On/Off manner Im getting tired writing Anyway please misinterpret what Ive written reach wrong conclusion Ill say again Flights both types controls can completely trouble-freebut flights highrate controls can much longer Period Bob Boucher just mentioned above strong believer competition example likes contest opposed fun fly likes design manufacture Astro products such competitive end use mind partic ular Bob can become very forceful comes international competition feelings run strong deep So does lament Bob tells hes very concerned about apparent lack interest throughout US model dom international Electric competition feels nation have much poorer showing such events theres excuse hear him talk matter can hum bling say least can tell up Bob US would soon become household word throughout world comes international Electric US team member names would become Continued page 151 July 1990 115 D&R P-51 H Sport Scale Mustang Rec Engine 000 ST 2 Stroke 1204 stroke Wing Span ing Area ox 1050 Weight 3 lbs Hardware $23900 Included plus shipping Fully Sheeted Almost Ready Cover PO Box 299 Gonzales TX 78629 512-672-7023 LIGHTING SYSTEMS THE ORIGINALS. Still Best #RED 01Programmable Flashing Navigation Lights$2495 #RED 02Adjustable Rate Strobe Light$1995 #RED 03Landing Lights$3995 # RED 04Adjustable Rate Mars Rotating Beacon$1995 #RED 05Marine Navigation Lights nonflashing$1095 #RED 14Big Airplane Navigation Lights$2495 #RED 16Econo Landing Lights brightest$1995 #RED 23Real Strobe Light true zenon strobe$2995 S SEE YOUR DEALER 0 SEND STAMPED ENVELOPE FOR RAM INFO If unavIlable locally send check money order full credit card info cost item plus $200 $500 foreign immediate shipment Include full address UPS Sorry no COD Ram 4736 N Milwaukee Ave ago IL 60630 aae White Laminating Epoxy & Fiberglass Strong tweight No Pin Holes tle e Construction dor RC Electrics/Kopski Continued page 115 household words well Bob feels future model aviation lies hobby becoming national sport associated major business aspects media implications course US domina tion international events would exist hand-inhand anxious promote kind thinking wants see sorts things hap pening Bob hinted might time dedicated Electric competition-oriented maga zine may indeed case did comment far can tell readers seem hobbyists flying Electric casually fun However did promise him Id try stir up sport-oriented and/or serious contest interest may latent among readers column Therefore am seriously requesting such inclinations please write Bob Boucher pronounced Boo-s/wy RMcM Astro Flight Inc 13311 Beach Ave Marina Del Rey CA 90292 tell im Bob sent ya Future columns will once again include some Electric basics Ive come realize monthly presentation has gradually strayed away area though intentionally Basics fact Model Aviation started its Electric coverage late 83 no matter what year-then nowthere always beginners seeking beginning information mind Ill once again cover some basic topics part future monthly installments wont forget experienced folks either Lets just say Ill strive balance Oh column longer now drizzly chilly April 1 Sunday afternoon have new electrified Sig Senior ita Im anxious fly So go out now After its first flight last Saturday snowstorm Folks Im hot fly Im hot fly Please direct comment question au thor address given column header Model Aviation editorial offices will reply correspondence accompanied SASE Happy quiet Electric landings everyonein rain snow whatever no matter what motor size RC Scale/Aune Continued page 45 Continue around circle using new mark derived through successive use tem plate new starting line until have five marks needed stars points Now slice straight lines connecting other point presto have mask star ready place model spray paint little 720 template will work size star up diameter 10 Scale math have calls people want know enlarge reduce scale detail using calculator problem cor rectly duplicating scale detail documenta tion model easily solved using ratioand-proportion math probably already know its worth going over dont method will take away guesswork invariably will pointed out some sharp judge things will need threecorner scale ruler calculator memo ry Such calculators available chain discount stores best kind have ap plication keeps its memory turned oft Make sure ruler has 60 fine marking scale will give highest resolution using small-sized documentation Heres go about task 1 Measure fuselage length plans model inches 2 Measure fuselage length docu mentation scale rulers 60 scale scale measurement 3 Find scale ratio calculator punch model inches press Divide key punch scale measurement press Equal key Put ratio calculators memory 4 Process a Press Memory Recall b Press X multiplication c Enter scale measurement 60 scale item documentation d Press l sign calculators screen will give direct readout actual inches model inches size item question example find model size round access panel top 76-in-span Bob Holman Corsair using Squadron/Signal pub lications documentation F4U Corsair Color following Press Memory Recall key 3 scale ra tio Multiply X 18 measured documentation using 60-scale ruler Continued page 154 July 1990 151
Edition: Model Aviation - 1990/07
Page Numbers: 42, 43, 110, 112, 115, 151
FIRST The Electric Connection Service now over half-year old quite few people have availed themselves opportunity find oth ers locale share fun Electric Any Electric modeler club interested attract ing attention since theres no engine noise can simply request writing Ill include name upcoming column Now must again ask somethingone time youve successful receiving response listing ECS please let know Otherwise might get idea ECS working Ill tempted use column space something else mind everyone please check out folks want meet up other locals share joy Electric Robert Osorlo 1903 Sans Souci Blvd N Miami FL 33181 Don Schneider PO Box 5441 Eugene OR 97405 tel 1-503/683-6301 Some Electric meets have announced cluding eighth annual Electric RC Fly-In spon sored Puget Sound Electric Model Fliers division Boeing Hawks RC Fliers meet scheduled June 23-24 Boeing Upgraded high-versatlilty gear box Ai Tec Products inc 18800 State Rt 47 East Sidney OH 45365 Package includes three gear ratios adapter plates can fit ted variety popuiar 05-size motors features heavy 3A-in shaft collet type prop adapter its $2995 pius postage Kent Space Center Field Kent WA meet offers prizes trophies Most Aerobatic Best Scale Longest Flight Most Impressive Best Multi-Motor plus special achievement awards addition AMA event 609 will flown info contact Bernard Cawley CD 29838 48th Ave S Auburn WA 98001 tel 1-206/839-9157 Ben Almojuela Asst CD 1941 6th Ave W Seattle WA 98119 tel 1-206/283-3407 third annual Electric fun-fly July 2122 sponsored Lehigh Valley Radio Control Society meet located near Easton PA offers events skill levels including Dura tion Aerobatics events open flying day day 100-acre facility 500ft grass runway info contact Ellis Grumer 321 Aurora St Phillipsburg NJ 08865 tel 1-201/859-0969 Tom Castellano tel 1215/759-6937 Finally same Sunday July 22 Northern Connecticut Radio Control Club NCRCC will hold Third Annual Electric Fly-In meet will feature Electric clinic Larry Sribnick SR Batteries Events include Handcrafted motor-mounting plate 040 aiuminum Paul Pickwick Louisville KY used rebuilding nose Electra after rapid earthrlse hope lessly modified models original plastic cowling motor mount components 42 Model Aviation Rado Control Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 THIS MONTHS TOPICS 1 Electric Connection Service plus request 2 Electric meets PSEMF LVRCS NCRCC 3 Reader response Topics box 4 Reader response motor size 5 Reader responsespeed control trou ble 6 Electric competitive sport 7 Coming up future columns Kopskl has Electrified Sig Seniorita geared Astro 24 14 1 200-mAh SCR NI-Cds All-up weight 84 oz poses snow just before its maiden flight March 24 nice gentle filer relaxation wing has modified two extra rib bays per panci other minor structural mods benefit Electric Guidance Airtronlcs RC modeier does significant amount soidering Ungar UTC 100 soldering sta tion offers controlled variabie temperature takes standard Ungar tipsjust like Radio Shack seiis Its own irons Bob found best price $5995 Edlie Eiectronics 2700 Hempstead Turnpike Levittown NY 117561443 tei 1-516/735-3330 Catalog #TA 6215-1 takes both Beth Ann Richard Affler back steady dad Roberts Willlngboro NJ electric-powered Dirty Birdy Pattern plane Power geared Astro 40 using 28 1 200-mAh Ni-Cd cells Juice metered Jomar SC-B big system controller re worked Zinger 105 x 75 prop blasts air 13000 rpm Bad news looks like plane photos John Prestons Safety Comes First column month seven-minute precision flight spot landing Pylon event Site NCRCC Ellington Field info contact Ronald Torrito 1625 Main St East Hartford CT 06108 tel 1203/528-2227 meets CD Larry Neal tel 1-203/537-4001 Topics box thats opening columns since January 90 issue has self brought reader reaction Ive received sev eral very favorable comments no negative ones reader thought MA column should adopt format Apparently feeling right Its often too hard find subject remember seeing somewhere Top ics box instituted help situation Thanks feedback folks Some reader response much-repeated What OHFIVE question generL alized motor size issue has finally come fact Ive received six letters two brothers Boucher reader Roy McGuck First Roland Boucher Leisure Elec tronics Roland proponent displace ment method categorizing speci1ring mo tort letter Roland reviews earliest As tro products part Astro early Sev enties describes first two products 10 25 former displace ment about 15cc produced torque about 10 in-oz 10000 rpm about 01 horsepower Thats about what 10-cu -in gas engine would Similarly 25 developed about 025 hp 10000 rpm volume about 18cc point Id like note displace ment used above means armature volume ie basically size motor armature Roland likens volume displaced reciprocating piston gas engine Roland goes describe evolution 05 beginning first Astro unit displacement about 95cc horsepower about 005 goes tell perContinued page 110 Special Fast Turnaround Now Available CALL Frequency Service ACe Cirrus EK Futaba Heathkit HobbyshaCk JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Ill Fly What Fix ARAMID izLKJUUULx-AU\A CABLE NON-METALLIC NON-CARBON NO STRETCHI ELIMINATE THE MAJOR CAUSE OF INTERFERENCE FROM CONTROL CABLES AND FLYING WIRES DUPONT KEVLAR 29 BRAIDED 12 OVER 2 DYED BLACK AND COATED FOR UV PROTECTION 200 POUND STRENGTH 20 FT/PACK T4w 44d46t 44Of JOMAR PRODUCIS 2028 KnightsbrIdge Dr 513-474-0985 Cinti OH 45244 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Blocks harmful ultraviolet radiation Attractive case included Wraparound frame fits comfortably over prescription glasses . Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available Clear shop work S1325 Amber overcast days & late afternoons S14~ Gray S14~ & Mirror S19~ sunny days CA Mask S1595 Paint Mask S2O~ member club hit prop blade thrown 60 engine close range lip blade struck Safely Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer Pikes Peak RC Club Prices include shipping handling PLLJ5 See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 ICont US Mississippi 1601 924-9640 /MC July 1990 43 Conversion $3500 Includes Crystals Certification SpectrumI Analyzers CalIbrated Test Instruments Large Inventory RIC Parts Crystals UPS US Mail Federal Express Used Mastercard Visa Accepted Send Large Self Addressed Envelope Brochures HERES HOW AMAZING BALSAPITE REDUCES BUBBLES AND SAGS Iron-on coverings tend stick surface balsa & other woods often leaving trapped air sagging coming unglued Balsarite IRON-ON liquid sinks COVERING deep wood s intermixes adhesive theWITH BALSARITE covering ironed No trapped air deep permanent adhesion Eliminates sagging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Coverite Monokote Solarfilm etc must use Balsarite takes gamble out covering iron-ons New Formula Film C 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA Radio Technique/Myers Continued page 85 cells did maintain 10-amp cur rent Instead current dropped instantly con tinuously Don Srull insisted cells inadequate job hand right tested some Sanyo N-800AR cells red la bel resistor pack batteries held 10-amp current five minutes fact showed over 900 mAh usable capacity moral dont right test dont get right test results story isnt finished Bob using four-cell 50-mAh pack receiver plane order save weight batteries obvi ously couldnt stand up load receiv er two servos Benson SC-i speed control ler idle current measured 20 mA jumped hundreds mAs servos moved 50-mAb pack exhausted itself before could flying told Bob thought receiver would run bet ter three-cell 175-mAh pack tried Weight critical performance Bobs small plane three-cell/175 pack weighed about same Bobs four-cell/SO pack RC system worked better flight performance still miserable got out oscilloscope looked mo tor current Thats discovered SC1 wasnt 100% motor current showed pulses duty cycle about 80% lit tle experimenting trouble traced back three-cell pack SC-i needs full-voltage pulses four-cell pack order reach 100% duty cycle three-cell/175 pack satis fled servos needs speed controller four-cell 100-mAh battery installed radio three-cell N 800AR battery Imp 30 motor plane flew very nicely What conclusion can drawn Ulti mately both problems faced same problem case trying draw far rated current Ni-Cd batteries you will lose termi nal voltage may able fully re cover rated capacity battery order find Out what really have must test under realistic conditions RC Electrics/Kopski Continued page 43 formance displacement-standardized 05 motors has increased over yearsin part driven interest RC carsand notes current Leisure 05 develops 300% power original Astro 05 con tinues feel its shame other pi oneers Electric flight failed recognize development displacement classes Elec tric motors would have provided stable market place similar development sizes Electric motors Fifty years ago AMA recog nized displacement method choice model airplane gas engines Lets join main stream model aviation establish some dis placement classes Electric motors Roland followed up first letter sec ond latter described 05 used Continued page 112 110 Model Aviation MOONEY 201 2 SCALE 70 SPAN 7 8 LBS ENG.40-6O2CYCLE 9O4CYCLE Machine Cut Parts Balsa Kit e Plans Approved3Views Complete Construction Manual Jig Built Flying Surfaces $13995 Complete Hardware p ng Ply Capped Cowl Wing Saddle & Surfaces Complete Decals YI order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio 44060 /216 953-1188 r 0 HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 ere proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP GUNFIGHTERS *POSITIVE FEELpr CA RES ADD *USED BY TOP PILOTS625% SALES TAX *FOR FUTABA AIRTRONICS JR OTHERS PLEASE SPECIFY RADIO OT Electrics SAM 49 over nine-year peri od somewhat involved story sum mary folks involved came agree upon use legal 05 having agreed-upon displacement also adopted specific mo tor run time specific battery Illegiti mate motors such some cobalts having ar mature greater volume part accommo dated shorter motor runs Bob Boucher Astro also wrote early days Electrics invented Electric flight mind would replace noisy greasy smelly glow engines types models started small trying replace OS Max o invented Electric system could swing 7 x 4 prop 12000 rpm just like OS Max Remember 1970 20 years ago Nowadays can better can 1990 cobalt 05 can bit much 1970 OS Max 10 So what Nothing ever stands still numerical size motors descriptive physical size amount torque produce same glow engines means turn same props roughly same rpm same letter follow-up Bob goes list some nomenclature used various sup pliers eg Astro 05 15 25 40 60 Keller 50 150 Graupner 600 900 1200 2000 includes some car motors Trinity Monster Insane theres Nuclear Assault Ninja Torque zilla onall aggressive names con vey idea killing competition also de scribes motor marketing RC car field has become numbers game sup plier highest advertised rpm gets lions share market Bob further notes real' cars have names also eg Lexus 400 BMW 375 Olds 98 cant really tell much descriptions Bobs point think may names mean little maybe shouldnt have interpreta tion part reinforced suggests ge readers become fluent jargon model motor trade Reader Roy MeGuckins Fairport NY two let ters suggest motor-rating system based way real electric motors rated NEMA national organization establishes stan dards rating methods industrial electric motors Such motors typically carry nameplate listing such basic info frame size horsepower volts/amps/watts rpm torque temperature rise duty class constant intermittent etc Having received Roys letter spoke friend works manufacturer small DC motorsnot unlike kind fly tells company its competitors es sentially own thing no common agreement among respect frame size physical size/shape mounting specification case dustrial motors would allow interchangeability among manufacturers However use other terms volts/amps/watts torque rpm etc makes sense can cer tainly accept developing standardized case/ mounting specifications model plane motors probably realistic expectation categoric ally reject thought some meaningful useContinued page 115 112 ModelAviation DLJ Especially formulated use gasoline diesel fuels Wont swell harden use new transparent green fuel line perfect fuel connections fuel pumps smoke systems Sold foot Medium TYGON Large local Hobby Shop gb-fuels sure use Du-Bros Neoprene Silicone fuel Tubing.the Modelers ChoiceFUEL DU-BRO PRODUCTS INC 480 BONNER RD WAUCONDA IL 60084TUBING D&J ELECTRONICS 900 Lucy Road ll Ml 48843 546-2644 service makes RIO equipment utilizing state art electronics Spectrum Analyzer Precision Frequency Measuring equipment True 1991 Standards endorsed AMA & RCMA Transmitter Slicker Program FCC LicensedSpeed Control RepairsQualIty ServIce Transmitter Checks Only includes GOLD/SILVER sticker$400 Transmitter & Receiver Calibration$2400 Frequency Upgrades & Changes crystals extra$2900 Bench Time Repairs per hour$2500 Transmitters service will receive AMA/RCMA sticker ADD $500 FOR SHIPPING & INSURANCE TURN AROUND TIME TWO WEEKS OR LESSII ACCEPTED ful nameplate info cant adopted label stan dard feel voltage cells maxi mum current before brushes/armature die prematurely rpm cause its nice know what expect prop watts input power properly propped cause way can re late what planes will perfectly reason able certainly useful nameplate parameters needed emotionalism 'killer names Now folks maybe am being unrealistic maybe unreasonable maybe Im missing real opportunity Perhaps should go busi ness produce size fits dynamite motor Ill call MASTODON technically demanding its really Ultra-Turbo HyperSubSpace Macro-Torque Mega Machine Ill give dry magnets made psuedo-neo-unobtainium will spin genetical ly refined activated molecular bearings shaft speed normally called rpm would prob ably about 97 kiloradians per microminute Yup sounds good Thats what Ill put label Plus words cars boats trains planes skateboards Ah long last motor thinking unthinking men women children household pets can first block render ex tinct others MASTODON will allow true killer really Oh What fun Now Ive poked little fun let refer April 90 issue RCM its Silent Power column friend column author Ted Davey offers some words about motor size batteries other things well Also want thank Roland Bob Roy taking time write two letters response search such input about rest Some readers have misunderstood discussion recent columns regarding differences tween frame-rate high-rate speed con trols has taken form reader input dicating ve no trouble frame-rate control am using would expect trouble Indeed Ive used several frame-rate controls have person ally no trouble can work just fineas far working goes Power systems frame-rate controls instead highrate controls have much worse power system ef ficiency control used other On/Off manner Im getting tired writing Anyway please misinterpret what Ive written reach wrong conclusion Ill say again Flights both types controls can completely trouble-freebut flights highrate controls can much longer Period Bob Boucher just mentioned above strong believer competition example likes contest opposed fun fly likes design manufacture Astro products such competitive end use mind partic ular Bob can become very forceful comes international competition feelings run strong deep So does lament Bob tells hes very concerned about apparent lack interest throughout US model dom international Electric competition feels nation have much poorer showing such events theres excuse hear him talk matter can hum bling say least can tell up Bob US would soon become household word throughout world comes international Electric US team member names would become Continued page 151 July 1990 115 D&R P-51 H Sport Scale Mustang Rec Engine 000 ST 2 Stroke 1204 stroke Wing Span ing Area ox 1050 Weight 3 lbs Hardware $23900 Included plus shipping Fully Sheeted Almost Ready Cover PO Box 299 Gonzales TX 78629 512-672-7023 LIGHTING SYSTEMS THE ORIGINALS. Still Best #RED 01Programmable Flashing Navigation Lights$2495 #RED 02Adjustable Rate Strobe Light$1995 #RED 03Landing Lights$3995 # RED 04Adjustable Rate Mars Rotating Beacon$1995 #RED 05Marine Navigation Lights nonflashing$1095 #RED 14Big Airplane Navigation Lights$2495 #RED 16Econo Landing Lights brightest$1995 #RED 23Real Strobe Light true zenon strobe$2995 S SEE YOUR DEALER 0 SEND STAMPED ENVELOPE FOR RAM INFO If unavIlable locally send check money order full credit card info cost item plus $200 $500 foreign immediate shipment Include full address UPS Sorry no COD Ram 4736 N Milwaukee Ave ago IL 60630 aae White Laminating Epoxy & Fiberglass Strong tweight No Pin Holes tle e Construction dor RC Electrics/Kopski Continued page 115 household words well Bob feels future model aviation lies hobby becoming national sport associated major business aspects media implications course US domina tion international events would exist hand-inhand anxious promote kind thinking wants see sorts things hap pening Bob hinted might time dedicated Electric competition-oriented maga zine may indeed case did comment far can tell readers seem hobbyists flying Electric casually fun However did promise him Id try stir up sport-oriented and/or serious contest interest may latent among readers column Therefore am seriously requesting such inclinations please write Bob Boucher pronounced Boo-s/wy RMcM Astro Flight Inc 13311 Beach Ave Marina Del Rey CA 90292 tell im Bob sent ya Future columns will once again include some Electric basics Ive come realize monthly presentation has gradually strayed away area though intentionally Basics fact Model Aviation started its Electric coverage late 83 no matter what year-then nowthere always beginners seeking beginning information mind Ill once again cover some basic topics part future monthly installments wont forget experienced folks either Lets just say Ill strive balance Oh column longer now drizzly chilly April 1 Sunday afternoon have new electrified Sig Senior ita Im anxious fly So go out now After its first flight last Saturday snowstorm Folks Im hot fly Im hot fly Please direct comment question au thor address given column header Model Aviation editorial offices will reply correspondence accompanied SASE Happy quiet Electric landings everyonein rain snow whatever no matter what motor size RC Scale/Aune Continued page 45 Continue around circle using new mark derived through successive use tem plate new starting line until have five marks needed stars points Now slice straight lines connecting other point presto have mask star ready place model spray paint little 720 template will work size star up diameter 10 Scale math have calls people want know enlarge reduce scale detail using calculator problem cor rectly duplicating scale detail documenta tion model easily solved using ratioand-proportion math probably already know its worth going over dont method will take away guesswork invariably will pointed out some sharp judge things will need threecorner scale ruler calculator memo ry Such calculators available chain discount stores best kind have ap plication keeps its memory turned oft Make sure ruler has 60 fine marking scale will give highest resolution using small-sized documentation Heres go about task 1 Measure fuselage length plans model inches 2 Measure fuselage length docu mentation scale rulers 60 scale scale measurement 3 Find scale ratio calculator punch model inches press Divide key punch scale measurement press Equal key Put ratio calculators memory 4 Process a Press Memory Recall b Press X multiplication c Enter scale measurement 60 scale item documentation d Press l sign calculators screen will give direct readout actual inches model inches size item question example find model size round access panel top 76-in-span Bob Holman Corsair using Squadron/Signal pub lications documentation F4U Corsair Color following Press Memory Recall key 3 scale ra tio Multiply X 18 measured documentation using 60-scale ruler Continued page 154 July 1990 151
Edition: Model Aviation - 1990/07
Page Numbers: 42, 43, 110, 112, 115, 151
FIRST The Electric Connection Service now over half-year old quite few people have availed themselves opportunity find oth ers locale share fun Electric Any Electric modeler club interested attract ing attention since theres no engine noise can simply request writing Ill include name upcoming column Now must again ask somethingone time youve successful receiving response listing ECS please let know Otherwise might get idea ECS working Ill tempted use column space something else mind everyone please check out folks want meet up other locals share joy Electric Robert Osorlo 1903 Sans Souci Blvd N Miami FL 33181 Don Schneider PO Box 5441 Eugene OR 97405 tel 1-503/683-6301 Some Electric meets have announced cluding eighth annual Electric RC Fly-In spon sored Puget Sound Electric Model Fliers division Boeing Hawks RC Fliers meet scheduled June 23-24 Boeing Upgraded high-versatlilty gear box Ai Tec Products inc 18800 State Rt 47 East Sidney OH 45365 Package includes three gear ratios adapter plates can fit ted variety popuiar 05-size motors features heavy 3A-in shaft collet type prop adapter its $2995 pius postage Kent Space Center Field Kent WA meet offers prizes trophies Most Aerobatic Best Scale Longest Flight Most Impressive Best Multi-Motor plus special achievement awards addition AMA event 609 will flown info contact Bernard Cawley CD 29838 48th Ave S Auburn WA 98001 tel 1-206/839-9157 Ben Almojuela Asst CD 1941 6th Ave W Seattle WA 98119 tel 1-206/283-3407 third annual Electric fun-fly July 2122 sponsored Lehigh Valley Radio Control Society meet located near Easton PA offers events skill levels including Dura tion Aerobatics events open flying day day 100-acre facility 500ft grass runway info contact Ellis Grumer 321 Aurora St Phillipsburg NJ 08865 tel 1-201/859-0969 Tom Castellano tel 1215/759-6937 Finally same Sunday July 22 Northern Connecticut Radio Control Club NCRCC will hold Third Annual Electric Fly-In meet will feature Electric clinic Larry Sribnick SR Batteries Events include Handcrafted motor-mounting plate 040 aiuminum Paul Pickwick Louisville KY used rebuilding nose Electra after rapid earthrlse hope lessly modified models original plastic cowling motor mount components 42 Model Aviation Rado Control Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 THIS MONTHS TOPICS 1 Electric Connection Service plus request 2 Electric meets PSEMF LVRCS NCRCC 3 Reader response Topics box 4 Reader response motor size 5 Reader responsespeed control trou ble 6 Electric competitive sport 7 Coming up future columns Kopskl has Electrified Sig Seniorita geared Astro 24 14 1 200-mAh SCR NI-Cds All-up weight 84 oz poses snow just before its maiden flight March 24 nice gentle filer relaxation wing has modified two extra rib bays per panci other minor structural mods benefit Electric Guidance Airtronlcs RC modeier does significant amount soidering Ungar UTC 100 soldering sta tion offers controlled variabie temperature takes standard Ungar tipsjust like Radio Shack seiis Its own irons Bob found best price $5995 Edlie Eiectronics 2700 Hempstead Turnpike Levittown NY 117561443 tei 1-516/735-3330 Catalog #TA 6215-1 takes both Beth Ann Richard Affler back steady dad Roberts Willlngboro NJ electric-powered Dirty Birdy Pattern plane Power geared Astro 40 using 28 1 200-mAh Ni-Cd cells Juice metered Jomar SC-B big system controller re worked Zinger 105 x 75 prop blasts air 13000 rpm Bad news looks like plane photos John Prestons Safety Comes First column month seven-minute precision flight spot landing Pylon event Site NCRCC Ellington Field info contact Ronald Torrito 1625 Main St East Hartford CT 06108 tel 1203/528-2227 meets CD Larry Neal tel 1-203/537-4001 Topics box thats opening columns since January 90 issue has self brought reader reaction Ive received sev eral very favorable comments no negative ones reader thought MA column should adopt format Apparently feeling right Its often too hard find subject remember seeing somewhere Top ics box instituted help situation Thanks feedback folks Some reader response much-repeated What OHFIVE question generL alized motor size issue has finally come fact Ive received six letters two brothers Boucher reader Roy McGuck First Roland Boucher Leisure Elec tronics Roland proponent displace ment method categorizing speci1ring mo tort letter Roland reviews earliest As tro products part Astro early Sev enties describes first two products 10 25 former displace ment about 15cc produced torque about 10 in-oz 10000 rpm about 01 horsepower Thats about what 10-cu -in gas engine would Similarly 25 developed about 025 hp 10000 rpm volume about 18cc point Id like note displace ment used above means armature volume ie basically size motor armature Roland likens volume displaced reciprocating piston gas engine Roland goes describe evolution 05 beginning first Astro unit displacement about 95cc horsepower about 005 goes tell perContinued page 110 Special Fast Turnaround Now Available CALL Frequency Service ACe Cirrus EK Futaba Heathkit HobbyshaCk JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Ill Fly What Fix ARAMID izLKJUUULx-AU\A CABLE NON-METALLIC NON-CARBON NO STRETCHI ELIMINATE THE MAJOR CAUSE OF INTERFERENCE FROM CONTROL CABLES AND FLYING WIRES DUPONT KEVLAR 29 BRAIDED 12 OVER 2 DYED BLACK AND COATED FOR UV PROTECTION 200 POUND STRENGTH 20 FT/PACK T4w 44d46t 44Of JOMAR PRODUCIS 2028 KnightsbrIdge Dr 513-474-0985 Cinti OH 45244 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Blocks harmful ultraviolet radiation Attractive case included Wraparound frame fits comfortably over prescription glasses . Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available Clear shop work S1325 Amber overcast days & late afternoons S14~ Gray S14~ & Mirror S19~ sunny days CA Mask S1595 Paint Mask S2O~ member club hit prop blade thrown 60 engine close range lip blade struck Safely Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer Pikes Peak RC Club Prices include shipping handling PLLJ5 See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 ICont US Mississippi 1601 924-9640 /MC July 1990 43 Conversion $3500 Includes Crystals Certification SpectrumI Analyzers CalIbrated Test Instruments Large Inventory RIC Parts Crystals UPS US Mail Federal Express Used Mastercard Visa Accepted Send Large Self Addressed Envelope Brochures HERES HOW AMAZING BALSAPITE REDUCES BUBBLES AND SAGS Iron-on coverings tend stick surface balsa & other woods often leaving trapped air sagging coming unglued Balsarite IRON-ON liquid sinks COVERING deep wood s intermixes adhesive theWITH BALSARITE covering ironed No trapped air deep permanent adhesion Eliminates sagging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Coverite Monokote Solarfilm etc must use Balsarite takes gamble out covering iron-ons New Formula Film C 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA Radio Technique/Myers Continued page 85 cells did maintain 10-amp cur rent Instead current dropped instantly con tinuously Don Srull insisted cells inadequate job hand right tested some Sanyo N-800AR cells red la bel resistor pack batteries held 10-amp current five minutes fact showed over 900 mAh usable capacity moral dont right test dont get right test results story isnt finished Bob using four-cell 50-mAh pack receiver plane order save weight batteries obvi ously couldnt stand up load receiv er two servos Benson SC-i speed control ler idle current measured 20 mA jumped hundreds mAs servos moved 50-mAb pack exhausted itself before could flying told Bob thought receiver would run bet ter three-cell 175-mAh pack tried Weight critical performance Bobs small plane three-cell/175 pack weighed about same Bobs four-cell/SO pack RC system worked better flight performance still miserable got out oscilloscope looked mo tor current Thats discovered SC1 wasnt 100% motor current showed pulses duty cycle about 80% lit tle experimenting trouble traced back three-cell pack SC-i needs full-voltage pulses four-cell pack order reach 100% duty cycle three-cell/175 pack satis fled servos needs speed controller four-cell 100-mAh battery installed radio three-cell N 800AR battery Imp 30 motor plane flew very nicely What conclusion can drawn Ulti mately both problems faced same problem case trying draw far rated current Ni-Cd batteries you will lose termi nal voltage may able fully re cover rated capacity battery order find Out what really have must test under realistic conditions RC Electrics/Kopski Continued page 43 formance displacement-standardized 05 motors has increased over yearsin part driven interest RC carsand notes current Leisure 05 develops 300% power original Astro 05 con tinues feel its shame other pi oneers Electric flight failed recognize development displacement classes Elec tric motors would have provided stable market place similar development sizes Electric motors Fifty years ago AMA recog nized displacement method choice model airplane gas engines Lets join main stream model aviation establish some dis placement classes Electric motors Roland followed up first letter sec ond latter described 05 used Continued page 112 110 Model Aviation MOONEY 201 2 SCALE 70 SPAN 7 8 LBS ENG.40-6O2CYCLE 9O4CYCLE Machine Cut Parts Balsa Kit e Plans Approved3Views Complete Construction Manual Jig Built Flying Surfaces $13995 Complete Hardware p ng Ply Capped Cowl Wing Saddle & Surfaces Complete Decals YI order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio 44060 /216 953-1188 r 0 HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 ere proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP GUNFIGHTERS *POSITIVE FEELpr CA RES ADD *USED BY TOP PILOTS625% SALES TAX *FOR FUTABA AIRTRONICS JR OTHERS PLEASE SPECIFY RADIO OT Electrics SAM 49 over nine-year peri od somewhat involved story sum mary folks involved came agree upon use legal 05 having agreed-upon displacement also adopted specific mo tor run time specific battery Illegiti mate motors such some cobalts having ar mature greater volume part accommo dated shorter motor runs Bob Boucher Astro also wrote early days Electrics invented Electric flight mind would replace noisy greasy smelly glow engines types models started small trying replace OS Max o invented Electric system could swing 7 x 4 prop 12000 rpm just like OS Max Remember 1970 20 years ago Nowadays can better can 1990 cobalt 05 can bit much 1970 OS Max 10 So what Nothing ever stands still numerical size motors descriptive physical size amount torque produce same glow engines means turn same props roughly same rpm same letter follow-up Bob goes list some nomenclature used various sup pliers eg Astro 05 15 25 40 60 Keller 50 150 Graupner 600 900 1200 2000 includes some car motors Trinity Monster Insane theres Nuclear Assault Ninja Torque zilla onall aggressive names con vey idea killing competition also de scribes motor marketing RC car field has become numbers game sup plier highest advertised rpm gets lions share market Bob further notes real' cars have names also eg Lexus 400 BMW 375 Olds 98 cant really tell much descriptions Bobs point think may names mean little maybe shouldnt have interpreta tion part reinforced suggests ge readers become fluent jargon model motor trade Reader Roy MeGuckins Fairport NY two let ters suggest motor-rating system based way real electric motors rated NEMA national organization establishes stan dards rating methods industrial electric motors Such motors typically carry nameplate listing such basic info frame size horsepower volts/amps/watts rpm torque temperature rise duty class constant intermittent etc Having received Roys letter spoke friend works manufacturer small DC motorsnot unlike kind fly tells company its competitors es sentially own thing no common agreement among respect frame size physical size/shape mounting specification case dustrial motors would allow interchangeability among manufacturers However use other terms volts/amps/watts torque rpm etc makes sense can cer tainly accept developing standardized case/ mounting specifications model plane motors probably realistic expectation categoric ally reject thought some meaningful useContinued page 115 112 ModelAviation DLJ Especially formulated use gasoline diesel fuels Wont swell harden use new transparent green fuel line perfect fuel connections fuel pumps smoke systems Sold foot Medium TYGON Large local Hobby Shop gb-fuels sure use Du-Bros Neoprene Silicone fuel Tubing.the Modelers ChoiceFUEL DU-BRO PRODUCTS INC 480 BONNER RD WAUCONDA IL 60084TUBING D&J ELECTRONICS 900 Lucy Road ll Ml 48843 546-2644 service makes RIO equipment utilizing state art electronics Spectrum Analyzer Precision Frequency Measuring equipment True 1991 Standards endorsed AMA & RCMA Transmitter Slicker Program FCC LicensedSpeed Control RepairsQualIty ServIce Transmitter Checks Only includes GOLD/SILVER sticker$400 Transmitter & Receiver Calibration$2400 Frequency Upgrades & Changes crystals extra$2900 Bench Time Repairs per hour$2500 Transmitters service will receive AMA/RCMA sticker ADD $500 FOR SHIPPING & INSURANCE TURN AROUND TIME TWO WEEKS OR LESSII ACCEPTED ful nameplate info cant adopted label stan dard feel voltage cells maxi mum current before brushes/armature die prematurely rpm cause its nice know what expect prop watts input power properly propped cause way can re late what planes will perfectly reason able certainly useful nameplate parameters needed emotionalism 'killer names Now folks maybe am being unrealistic maybe unreasonable maybe Im missing real opportunity Perhaps should go busi ness produce size fits dynamite motor Ill call MASTODON technically demanding its really Ultra-Turbo HyperSubSpace Macro-Torque Mega Machine Ill give dry magnets made psuedo-neo-unobtainium will spin genetical ly refined activated molecular bearings shaft speed normally called rpm would prob ably about 97 kiloradians per microminute Yup sounds good Thats what Ill put label Plus words cars boats trains planes skateboards Ah long last motor thinking unthinking men women children household pets can first block render ex tinct others MASTODON will allow true killer really Oh What fun Now Ive poked little fun let refer April 90 issue RCM its Silent Power column friend column author Ted Davey offers some words about motor size batteries other things well Also want thank Roland Bob Roy taking time write two letters response search such input about rest Some readers have misunderstood discussion recent columns regarding differences tween frame-rate high-rate speed con trols has taken form reader input dicating ve no trouble frame-rate control am using would expect trouble Indeed Ive used several frame-rate controls have person ally no trouble can work just fineas far working goes Power systems frame-rate controls instead highrate controls have much worse power system ef ficiency control used other On/Off manner Im getting tired writing Anyway please misinterpret what Ive written reach wrong conclusion Ill say again Flights both types controls can completely trouble-freebut flights highrate controls can much longer Period Bob Boucher just mentioned above strong believer competition example likes contest opposed fun fly likes design manufacture Astro products such competitive end use mind partic ular Bob can become very forceful comes international competition feelings run strong deep So does lament Bob tells hes very concerned about apparent lack interest throughout US model dom international Electric competition feels nation have much poorer showing such events theres excuse hear him talk matter can hum bling say least can tell up Bob US would soon become household word throughout world comes international Electric US team member names would become Continued page 151 July 1990 115 D&R P-51 H Sport Scale Mustang Rec Engine 000 ST 2 Stroke 1204 stroke Wing Span ing Area ox 1050 Weight 3 lbs Hardware $23900 Included plus shipping Fully Sheeted Almost Ready Cover PO Box 299 Gonzales TX 78629 512-672-7023 LIGHTING SYSTEMS THE ORIGINALS. Still Best #RED 01Programmable Flashing Navigation Lights$2495 #RED 02Adjustable Rate Strobe Light$1995 #RED 03Landing Lights$3995 # RED 04Adjustable Rate Mars Rotating Beacon$1995 #RED 05Marine Navigation Lights nonflashing$1095 #RED 14Big Airplane Navigation Lights$2495 #RED 16Econo Landing Lights brightest$1995 #RED 23Real Strobe Light true zenon strobe$2995 S SEE YOUR DEALER 0 SEND STAMPED ENVELOPE FOR RAM INFO If unavIlable locally send check money order full credit card info cost item plus $200 $500 foreign immediate shipment Include full address UPS Sorry no COD Ram 4736 N Milwaukee Ave ago IL 60630 aae White Laminating Epoxy & Fiberglass Strong tweight No Pin Holes tle e Construction dor RC Electrics/Kopski Continued page 115 household words well Bob feels future model aviation lies hobby becoming national sport associated major business aspects media implications course US domina tion international events would exist hand-inhand anxious promote kind thinking wants see sorts things hap pening Bob hinted might time dedicated Electric competition-oriented maga zine may indeed case did comment far can tell readers seem hobbyists flying Electric casually fun However did promise him Id try stir up sport-oriented and/or serious contest interest may latent among readers column Therefore am seriously requesting such inclinations please write Bob Boucher pronounced Boo-s/wy RMcM Astro Flight Inc 13311 Beach Ave Marina Del Rey CA 90292 tell im Bob sent ya Future columns will once again include some Electric basics Ive come realize monthly presentation has gradually strayed away area though intentionally Basics fact Model Aviation started its Electric coverage late 83 no matter what year-then nowthere always beginners seeking beginning information mind Ill once again cover some basic topics part future monthly installments wont forget experienced folks either Lets just say Ill strive balance Oh column longer now drizzly chilly April 1 Sunday afternoon have new electrified Sig Senior ita Im anxious fly So go out now After its first flight last Saturday snowstorm Folks Im hot fly Im hot fly Please direct comment question au thor address given column header Model Aviation editorial offices will reply correspondence accompanied SASE Happy quiet Electric landings everyonein rain snow whatever no matter what motor size RC Scale/Aune Continued page 45 Continue around circle using new mark derived through successive use tem plate new starting line until have five marks needed stars points Now slice straight lines connecting other point presto have mask star ready place model spray paint little 720 template will work size star up diameter 10 Scale math have calls people want know enlarge reduce scale detail using calculator problem cor rectly duplicating scale detail documenta tion model easily solved using ratioand-proportion math probably already know its worth going over dont method will take away guesswork invariably will pointed out some sharp judge things will need threecorner scale ruler calculator memo ry Such calculators available chain discount stores best kind have ap plication keeps its memory turned oft Make sure ruler has 60 fine marking scale will give highest resolution using small-sized documentation Heres go about task 1 Measure fuselage length plans model inches 2 Measure fuselage length docu mentation scale rulers 60 scale scale measurement 3 Find scale ratio calculator punch model inches press Divide key punch scale measurement press Equal key Put ratio calculators memory 4 Process a Press Memory Recall b Press X multiplication c Enter scale measurement 60 scale item documentation d Press l sign calculators screen will give direct readout actual inches model inches size item question example find model size round access panel top 76-in-span Bob Holman Corsair using Squadron/Signal pub lications documentation F4U Corsair Color following Press Memory Recall key 3 scale ra tio Multiply X 18 measured documentation using 60-scale ruler Continued page 154 July 1990 151