Radio Control Electrics Bob Kopski HAD opportunity speak Jeff Surgnier Frank Heinrich Robbe Modelisport recent KRC Electric Fly flew both days did nice job talking learned Robbe planning promote Electric products country near future Both Jeff boss Frank have very positive outlook future Electric Robbe already has number products available local hobby dealer should able get through normal distributor chan nels ask him past some Robbe products have reached dealer shelves instructions foreign language slipup will corrected future Anyone having such instructions may get some help dropping line Jeff Surgnier Suite 2D Office Center Princeton Meadows Plainsboro NJ 08536 Tell Jeff ya read MA nearly year half Ive writing largely intent helping readers get started Electric firsttime continuing success called Electric Elation Ive received lots letters commenting favorably MAs Electric series September 1983 1984 column beginning July 1984 Roughly speaking Ive received average three four letters week Often writers wanted specific additional information over what appeared various articles Interestingly enough Ive received virtually no letters between appearance November 1984 issue writing several weeks November column lot say about Electric competition no rules recommend4tion can con clude essentially no interest Electric competition surely issues controversialor least thought soand expected whole bunch pros cons burdening mailman fact got two lettersboth pro views think nearly no response~ strong evidence what Ive often said folks just trying get something Electric fly have some fun couldnt care less about competition Now want turn tables little see need some help Perhaps someone out can shed some light aerody namic matter Assuming get some help Ill pass along future column would like know better spend same total electrical power twin vs single motor other words could expect better power utilization twin total demand battery same would other wise use conventional single-motor planeall other aspects weight size etc being same does swept prop area figure inif does Long ago far away read something about cant relocate source Im asking Now thats switch different topic expression often used conjunction motors hot wind No warm July breeze Its term describing armature windingrelatively speak ing As far Im concerned term should never have used because may often imply something thats really case Lets look closely Relatively speaking hot wind means armature fewer turns wire Fewer what Fewer No Im being coyI told relative term other things ing equal motor will turn faster fewer turns wire armature fact direct proportion volvedhalf turns means twice rpm approximately before go unwinding wire motor youd better read what follows number considerations go selection motor wind ing key driver regard number battery cells product intended used nuitiber cells determines applied voltage conjunction winding count certain other constants deter48Model Aviation Sporty Electric model Dan Mittenhls second model kindl Craft weighs 36 oz uses beefed up wing tail surfaces big Comet 54-in stick-and-tissue Taylororaft kit plus original sheet-balsa fuselage Power Astro 075 either 6-cell 12 Ah 7-cell 08 Ah battery pack Control rudder elevator speed control via Jomar SC-i unit Cannon radio 6-meter frequency Dan climbs smoothly full juice eases up cruise around 67 mm pleasurable model Gus Janger Philadelphia PA uses cooling blower battery pack modified Sparky keep batteries cool being recharged Fan motor defunct tape recorder fan pair hA props mounted birdoage made %2in brazing rod modelers use small blowers type another help cool down battery pack after landing before charging next flight mines nominal rpm propeller mechanical load motor directly influences power re quired motor hence battery thus current also dic tated little increase rpm given propeller very large increase mechanical load hence large increase current drain So bit hasty broad brush neglecting things like efficiency etc should least get idea relative effects changing turns wire motors armature above example what Ive said often cant get something nothing Hot wind does get impressive flying free allows same power develop fewer cells course shorter time due increased current draw So before run off something drastic think about what consequences As far Im concerned best appli cation hot wind conjunction speed reducerseither belt drive type geared application higher-speed armature given cell count often desirable again depending range variables other appropriate application hot wind direct drive very very fast alrplane suitably-propped motor can unload maintain reasonable current draw About worst application hot wind can think direct drive naturally slow model such glider Old-Timer now have distinct impression can bit com plicated youre rightif choose make having such impres sion evidence Ive made point hot wind may what may have thought simple somethihg nothing Continued page 136 left two armatures popular Leisure LT-50 motors left isa competition wind variety other pattern wind Whats difference competition wind unit has few lessturns wire thewinding go aheadcountem Thistype often used installation having speed reducerand large high-pitched prop Youd find Glider Old-Timer Scale ship likely right clever lightweight V-tail control mixer Ken Stinsons Electric glider Servo small wood tray has dual pushrods going ruddervator surfaces suspended via four-wire swing Its mounting platform driven short pushrod fixed servo Connector used ball-and-socket type Operation very smooth friction-free H0bbV H Old Timer IvLq4 2ks Aam JJILThIL1 /lif0dL S~7LLLAaZOS 9 GAS NGOEL REcO5 8REAKE 1938 Record Breaker 96 4060 4 Strokes $6500 1938 Kioud King 63 1530 Glo/4 Stroke$4399 1941 Berkeley Brigidier 56 040-15 Gb$3690 1941 Super Quaker 79 40-45 4 Strokes$7409 1936 Buccaneer64$51 1938 Clipper ME I72$39 1937 Dallsire Sptser108$63 59lS4OEanger-49-$37 1939 Mercury72$56 1935 Miss America84$59 1941 Playboy Jr54$29 1941 Playboy Sr89-$46 1938 Powerhouse84$45 59 1940 Sailplane78$74 1940 So Long50-$29 1936 Trenton Terror72-$32 1939 Zipper54$46 1939 Korda Wakefleld44 $17 kits qualify SAM events FF & K/C feature highest quality machine cut sanded parts Superior alt Competition alt sheet sod strip mood wire window maierial Plans orig PP hut models ae easily convertible 3ch R/C Kits Gas Electric/Electric Systems & Acc 4Ks Buzzard Bombshell 72 Span R/CPP $5495 4Ks 70% Bombshell 504 Span R/C PP$3995 Hobby Horn Sensoar Glider 70 95 Electric $1690 Midway Model Past Eddie Acrobatic/OS Elect $2000 Midway Model Gnome K/C Hand Launch Glid $3495 Leisure Playboy Sr LT-56 Geared Electric$3000 Jolly Electricus Glider 05/LT-50 Electric $3250 Astro Cobalt 05 System 7 Cell Direct$11309 Astro Cobalt Geared 2 1 System $14709 Leisure LTS0 Girect 6 Cell $40 7 Cell $5009 Leisure LT59 Geared 25 1 6 Cell$6500 Astro Sport improved 95 Direct $1800 Leisure Wasn LT55 --- -$2300 - -- auorsBeooastca SHIPPING & HANDLING 64 Page CATALOGUE Up $800 add $150$200 PP/lst Class $801 $2009 add $225 copy will sent $3091 $4596 add $306 free-when requested$4501 $7060 add $350 a-n ord over $7090 add $406HOBBY HGRN CA Addressees add 6% tax 15173 Moran St [A] Send MO Visa/MC#ExpPO Box 2212 Check allow up tO 50Westminster Ca 92684 days CK clearance 714 893-8311 COD Exact Charges plus $150 HdI Cash OnlyAft Hrs 714 8851203 February 198549 0 TIGER TAIL 4 Ron Chidgelis latest best series little larger lighter slower retains honest flight character tistics its predecessors Especially recommended sportsman ad vanced pattern also good choice turn-around pattern Plans ahd construction hints -$995 WELLER 3 BLADE PROP very stiff molded fiberglas propellor England ta efficient design allows substantial reduction noise level actually improving per formance $2000 NEW CLAMP IT FOREVER STAINLESS STEEL PIPE CLAMPS Lrght strong Low-profile selfiocking 3116 width wont cut silicone couplers Pkg 4 clamps $295 RC Old-Timers/Mathews Continued page 133 relatively inexpensive easy-to-build fun-to-fly little rascals absolutely perfect first Old-Timer subjects would anticipate event may finally make point Free Flight frater nity adding RC Free Flight model reduce retrieving problems add usable flying sites sacrilege Interestingly since motor runs timid function much fuel can squeeze Black Widow tank two completely divergent approavh es haye evolved group favors high nitro small props gain lots altitude two three minutes motor run other NEW Sleeve Puller $795 BearIng Puller $695 1 dia aluminum alloy tubing plug-in wings Included pair ot special slip-fit phenolic sockets build wing-structure 2024 alum tube 24 long socket 12 long 589SIset ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily damage Cone cone expanding brass ring grips sleeve bearing ID new 60s 17MM rear bearing * Special * Both $1395 See Dealer Order Direct Include 75 Per Item UPS GP Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-863g favors low nitro 8 x 3 larger props seven- eight-minute motor runs Frankly 15-minute maxes seems better off long runs high-fast approach depends thermals flight slow-low seemingly assures least 10 minutes no lift just little 'help' 15-minute max well within reach obtain long engine runs mod ifications such twoor three head gaskets l0o nitro fuel 8 x 4 8 x 6 props used Needle settings become very critical regular heads may necessary look through large batch Black Widows before properly-fitted fouhd Front bearing slop absolute nono Most also modifying fuel pickup original plastic J-shaped section Yn2 ID brass aluminum tubing East side west side Since 1985 SAM Champs held California AMA Nats Massachusetts RC OldTimer nuts either coast being given chance attend major meets next sum mer middle country can choose attend both 1986 sfiould see reverse setup 1987 SAM Champs would Mid west Ill bet Fort Worth Plainsmen could host super SAM Champs what feel premier site Free Flight RC-Assist amid Acres about Texans Dee B Mathews 8420 Nantucket Wichita KS 67212 responding advertisers mention read about Model Aviation RC Electrics/Kopski Continued page 49 Since personally fly mostly direct drive have little interest hot winds Id much prefer stay reasonable winding select cell count prop size job hand Im happy report Astro has recent ly added bit winding several thefr motors Given option Id always take larger slower direct-drive prop smaller faster kinds models fly realize discussion bit cram sessiofl everything may totally clear everyone Depending reader reaction may get future columns Another new topic time col umn appears will dead winter some places like live means cold temperatures other unpleas antness such frost snow etc Included list less flying doesnt mean no flying cause theres no basic reason Electric cant flown under such conditions So youve won dering about effects cold Electric wonder no Read planes stored tached unheated garage winter garage temperatures often reach freezing otherwise least very cold Ive same house close 20 years have never temperature-related problem air borne radio equipment Electric equipment including batteries charging have routinely brought cold models normal-tempera ture shop charge radio have routinely charged motor batteries snow-covered fields however noticeable difference latter Continued page 138 rAcrylic Clear Dope glues shrinks seals coverings pArtisan Fuel Proofer spray brushdries completely clear tack-free 15 minuteswill dissolve cut paint applying super glossfinish100% brush-mark free Color Clear Feel Proofer 4ez $175 Sex $295 4oz $150 Sos $250 4o $195 Box $395 U Light Green U Orange U Grey U Aluminum U Maroon U Red U Dark Red U Sky BlueU Florescent Grange U Black U White U Cub Yellow U Brown U Tan U Green U Acrylic Clear U Artisan Fuel Proof er U NEW WING TUBE & SOCKETS NEW PermaGritTM Utetlme * Carbide Sanding Tools g p c TUNGSTEN CARBIDE GRIT-Mans hardest . erial next mond - r BRAZED TO --. -. STEEL.S 1 - made Modelers AverageFLAT TOOL 40 x 11/2 X Use e balsa hard woods .tyraffiberglassbeaded foams epoxy fillers .jr.y iglass REYOUTOTRyIT MONEY BACK GUARANTEE FOR MAIL ORDERS ONLY ONLY $6~ YOUR DEALER FIRST OR SEND FOR COMPLETE LIST OF B TOOLS SEND SSAE FOR COMPLETE LIST OF TOOLS DG PRODUCTS CO 209 Carrlands Dr Dayton OH 45429 Si3 294-1192 lOhiores addB% TaxI U Air Brush Hand brush ordering stete color size quantity Add $200 poatage IWI ree add 5% sales taxl AlTENTION ERS common experience nor mal temperatures days first flight good after first charge day doesnt seem good follow never viewed phenomenon being temperature-related often refer red warm-up However situation changes cold-storage conditions described above first charge really warm-up may second third no question about first very cold flight likely quite bit slug gish second possibly third Thereafter fingers may freezing motor battery behavior seems perfectly normal because think batteries warm hot use have forgotten cold week garage once have ex perienced significant power increase flight batteries warmed up time Id expect some drop power due normal charge depletion way winter air around best air year flying may uncomfortable cold dry dense air sure makes plane fly great Models seem light buoyant likely have significantly longer motor runs because seems plane weighs less less power expended keeping plane up power available make plane go may have guessed condition has dual opposite worst flying air thin humid hot air summer whenever models Electric affected both extremes Another incidental before leaving subject planes stored garage flight box kept inside nor mal temperatures contains lead/acid tractor-size battery fuel prefer just keep familiar temperatures guess its memories hard car starts cold mornings Finally readers loners immediate areas some areas enjoying small groups fliers just two three persons Id like encourage scattered groups few fliers consider hosting Electric Fly-in upcoming year column will help announcing intentions Dont worry about making big deal Forget events Forget prizes Forget anything sounds like work except course sending information incom ing inquiries Just make come fly us day weekend have share yourselves Electric inter ests field No doubt several loners small groups within easy traveling distance just dying find some else share interests Think over send informa tion Remember takes few months get print get moving now Happy Landings Bob Kopski 25 West End Dr Lans dale PA 19446 RC Pylon Racing/Hager Continued page 52 advanced ignition Care must taken starting engine regulate current flow through element order prevent damage Having fine element plug easily destroyed lean mixture setting state plug element good dication running conditions within engine especially useful during racing difficult distinguish sound ones own engine ele ment after race found intact undistorted mixture probably set too rich element found tact slightly distorted mixture probably -correct setting plug must changed race main tain performance element found intact found severely distorted mixture probably too lean Great care must taken using plug lean mixture setting may cause element become detached resulting irrevocable damage piston/liner cylinder head Head clearance volume available combustion chamber top dead center piston stroke directly related clearance between piston crown cylinder head squish band Continued page 140 138Model Aviation L5NAI~ hinge allows control surface removal tools Driuuv~lost pins problems PATENTpainting PENDINGcoveringrepair transportation storage etc Scale Appearance InsertSimple Assembly 3 SIZES No Slots1*4s-6 $335 38-6 $445 Rotate 900No Pins12-6 $495 EPOXY GLASS COWLS FOR NOSEN PICA SW SIORGAM BALSA USA PLATT CONCEPT FLEET HOSTETLER ACM T-CAAFT SHEBER P/iTS & SCALE SUPER CUB FOKEER 0-7 BOEING P- 72 P-2B F4B2 MBE SPARROW HAWK GEE BEE MOO Y MACBR/ENS TURBULENT CHRISTEN EAGLE BRISIGHEL LAS STAROUS TEA II A SCALE J3BI BABY FLYBABY AIRCAMPER PILOT JUAGMA N/V 735 SCALE 7/4 SCALE DECATHALON PIPER PA- YB N OTHERS WHEEL PANTS FOR C/TA BR/A STAROUS TEA II P/iTS SKYBOL T L/BERTYSPOAT CHRISTEN EAGLE PSEHAWE STEARMAN SIINSON SR-S MULLIGAN N OTHERS BRAZEDO HEAT-ThEATED WIRE GEARS& CADANES lARGE SCALE PLANS AVAILABLE Send $100 latest list supply Modelers fiberglass parts plansWrite cell us T b D FIBERGLASS SPECIALTIES 30925 BWCK GARDEN CflY MI 48735 PHONE 313 421-6356 Power Soar New Heights Send self-addressed stamped envelope catalog ap plication notes Leisure 11 Deerspring/IrvinelCA 92714 LT-50 GEAR MOTOR Leisures Gear Drive conversion 31 powerful LT-50 develops up 2 lbs static trhrust Gear Drive also features ball bearing Delrinlbrass gearing glass loaded polycarbonate housing
Edition: Model Aviation - 1985/02
Page Numbers: 48, 49, 136, 138
Radio Control Electrics Bob Kopski HAD opportunity speak Jeff Surgnier Frank Heinrich Robbe Modelisport recent KRC Electric Fly flew both days did nice job talking learned Robbe planning promote Electric products country near future Both Jeff boss Frank have very positive outlook future Electric Robbe already has number products available local hobby dealer should able get through normal distributor chan nels ask him past some Robbe products have reached dealer shelves instructions foreign language slipup will corrected future Anyone having such instructions may get some help dropping line Jeff Surgnier Suite 2D Office Center Princeton Meadows Plainsboro NJ 08536 Tell Jeff ya read MA nearly year half Ive writing largely intent helping readers get started Electric firsttime continuing success called Electric Elation Ive received lots letters commenting favorably MAs Electric series September 1983 1984 column beginning July 1984 Roughly speaking Ive received average three four letters week Often writers wanted specific additional information over what appeared various articles Interestingly enough Ive received virtually no letters between appearance November 1984 issue writing several weeks November column lot say about Electric competition no rules recommend4tion can con clude essentially no interest Electric competition surely issues controversialor least thought soand expected whole bunch pros cons burdening mailman fact got two lettersboth pro views think nearly no response~ strong evidence what Ive often said folks just trying get something Electric fly have some fun couldnt care less about competition Now want turn tables little see need some help Perhaps someone out can shed some light aerody namic matter Assuming get some help Ill pass along future column would like know better spend same total electrical power twin vs single motor other words could expect better power utilization twin total demand battery same would other wise use conventional single-motor planeall other aspects weight size etc being same does swept prop area figure inif does Long ago far away read something about cant relocate source Im asking Now thats switch different topic expression often used conjunction motors hot wind No warm July breeze Its term describing armature windingrelatively speak ing As far Im concerned term should never have used because may often imply something thats really case Lets look closely Relatively speaking hot wind means armature fewer turns wire Fewer what Fewer No Im being coyI told relative term other things ing equal motor will turn faster fewer turns wire armature fact direct proportion volvedhalf turns means twice rpm approximately before go unwinding wire motor youd better read what follows number considerations go selection motor wind ing key driver regard number battery cells product intended used nuitiber cells determines applied voltage conjunction winding count certain other constants deter48Model Aviation Sporty Electric model Dan Mittenhls second model kindl Craft weighs 36 oz uses beefed up wing tail surfaces big Comet 54-in stick-and-tissue Taylororaft kit plus original sheet-balsa fuselage Power Astro 075 either 6-cell 12 Ah 7-cell 08 Ah battery pack Control rudder elevator speed control via Jomar SC-i unit Cannon radio 6-meter frequency Dan climbs smoothly full juice eases up cruise around 67 mm pleasurable model Gus Janger Philadelphia PA uses cooling blower battery pack modified Sparky keep batteries cool being recharged Fan motor defunct tape recorder fan pair hA props mounted birdoage made %2in brazing rod modelers use small blowers type another help cool down battery pack after landing before charging next flight mines nominal rpm propeller mechanical load motor directly influences power re quired motor hence battery thus current also dic tated little increase rpm given propeller very large increase mechanical load hence large increase current drain So bit hasty broad brush neglecting things like efficiency etc should least get idea relative effects changing turns wire motors armature above example what Ive said often cant get something nothing Hot wind does get impressive flying free allows same power develop fewer cells course shorter time due increased current draw So before run off something drastic think about what consequences As far Im concerned best appli cation hot wind conjunction speed reducerseither belt drive type geared application higher-speed armature given cell count often desirable again depending range variables other appropriate application hot wind direct drive very very fast alrplane suitably-propped motor can unload maintain reasonable current draw About worst application hot wind can think direct drive naturally slow model such glider Old-Timer now have distinct impression can bit com plicated youre rightif choose make having such impres sion evidence Ive made point hot wind may what may have thought simple somethihg nothing Continued page 136 left two armatures popular Leisure LT-50 motors left isa competition wind variety other pattern wind Whats difference competition wind unit has few lessturns wire thewinding go aheadcountem Thistype often used installation having speed reducerand large high-pitched prop Youd find Glider Old-Timer Scale ship likely right clever lightweight V-tail control mixer Ken Stinsons Electric glider Servo small wood tray has dual pushrods going ruddervator surfaces suspended via four-wire swing Its mounting platform driven short pushrod fixed servo Connector used ball-and-socket type Operation very smooth friction-free H0bbV H Old Timer IvLq4 2ks Aam JJILThIL1 /lif0dL S~7LLLAaZOS 9 GAS NGOEL REcO5 8REAKE 1938 Record Breaker 96 4060 4 Strokes $6500 1938 Kioud King 63 1530 Glo/4 Stroke$4399 1941 Berkeley Brigidier 56 040-15 Gb$3690 1941 Super Quaker 79 40-45 4 Strokes$7409 1936 Buccaneer64$51 1938 Clipper ME I72$39 1937 Dallsire Sptser108$63 59lS4OEanger-49-$37 1939 Mercury72$56 1935 Miss America84$59 1941 Playboy Jr54$29 1941 Playboy Sr89-$46 1938 Powerhouse84$45 59 1940 Sailplane78$74 1940 So Long50-$29 1936 Trenton Terror72-$32 1939 Zipper54$46 1939 Korda Wakefleld44 $17 kits qualify SAM events FF & K/C feature highest quality machine cut sanded parts Superior alt Competition alt sheet sod strip mood wire window maierial Plans orig PP hut models ae easily convertible 3ch R/C Kits Gas Electric/Electric Systems & Acc 4Ks Buzzard Bombshell 72 Span R/CPP $5495 4Ks 70% Bombshell 504 Span R/C PP$3995 Hobby Horn Sensoar Glider 70 95 Electric $1690 Midway Model Past Eddie Acrobatic/OS Elect $2000 Midway Model Gnome K/C Hand Launch Glid $3495 Leisure Playboy Sr LT-56 Geared Electric$3000 Jolly Electricus Glider 05/LT-50 Electric $3250 Astro Cobalt 05 System 7 Cell Direct$11309 Astro Cobalt Geared 2 1 System $14709 Leisure LTS0 Girect 6 Cell $40 7 Cell $5009 Leisure LT59 Geared 25 1 6 Cell$6500 Astro Sport improved 95 Direct $1800 Leisure Wasn LT55 --- -$2300 - -- auorsBeooastca SHIPPING & HANDLING 64 Page CATALOGUE Up $800 add $150$200 PP/lst Class $801 $2009 add $225 copy will sent $3091 $4596 add $306 free-when requested$4501 $7060 add $350 a-n ord over $7090 add $406HOBBY HGRN CA Addressees add 6% tax 15173 Moran St [A] Send MO Visa/MC#ExpPO Box 2212 Check allow up tO 50Westminster Ca 92684 days CK clearance 714 893-8311 COD Exact Charges plus $150 HdI Cash OnlyAft Hrs 714 8851203 February 198549 0 TIGER TAIL 4 Ron Chidgelis latest best series little larger lighter slower retains honest flight character tistics its predecessors Especially recommended sportsman ad vanced pattern also good choice turn-around pattern Plans ahd construction hints -$995 WELLER 3 BLADE PROP very stiff molded fiberglas propellor England ta efficient design allows substantial reduction noise level actually improving per formance $2000 NEW CLAMP IT FOREVER STAINLESS STEEL PIPE CLAMPS Lrght strong Low-profile selfiocking 3116 width wont cut silicone couplers Pkg 4 clamps $295 RC Old-Timers/Mathews Continued page 133 relatively inexpensive easy-to-build fun-to-fly little rascals absolutely perfect first Old-Timer subjects would anticipate event may finally make point Free Flight frater nity adding RC Free Flight model reduce retrieving problems add usable flying sites sacrilege Interestingly since motor runs timid function much fuel can squeeze Black Widow tank two completely divergent approavh es haye evolved group favors high nitro small props gain lots altitude two three minutes motor run other NEW Sleeve Puller $795 BearIng Puller $695 1 dia aluminum alloy tubing plug-in wings Included pair ot special slip-fit phenolic sockets build wing-structure 2024 alum tube 24 long socket 12 long 589SIset ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily damage Cone cone expanding brass ring grips sleeve bearing ID new 60s 17MM rear bearing * Special * Both $1395 See Dealer Order Direct Include 75 Per Item UPS GP Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-863g favors low nitro 8 x 3 larger props seven- eight-minute motor runs Frankly 15-minute maxes seems better off long runs high-fast approach depends thermals flight slow-low seemingly assures least 10 minutes no lift just little 'help' 15-minute max well within reach obtain long engine runs mod ifications such twoor three head gaskets l0o nitro fuel 8 x 4 8 x 6 props used Needle settings become very critical regular heads may necessary look through large batch Black Widows before properly-fitted fouhd Front bearing slop absolute nono Most also modifying fuel pickup original plastic J-shaped section Yn2 ID brass aluminum tubing East side west side Since 1985 SAM Champs held California AMA Nats Massachusetts RC OldTimer nuts either coast being given chance attend major meets next sum mer middle country can choose attend both 1986 sfiould see reverse setup 1987 SAM Champs would Mid west Ill bet Fort Worth Plainsmen could host super SAM Champs what feel premier site Free Flight RC-Assist amid Acres about Texans Dee B Mathews 8420 Nantucket Wichita KS 67212 responding advertisers mention read about Model Aviation RC Electrics/Kopski Continued page 49 Since personally fly mostly direct drive have little interest hot winds Id much prefer stay reasonable winding select cell count prop size job hand Im happy report Astro has recent ly added bit winding several thefr motors Given option Id always take larger slower direct-drive prop smaller faster kinds models fly realize discussion bit cram sessiofl everything may totally clear everyone Depending reader reaction may get future columns Another new topic time col umn appears will dead winter some places like live means cold temperatures other unpleas antness such frost snow etc Included list less flying doesnt mean no flying cause theres no basic reason Electric cant flown under such conditions So youve won dering about effects cold Electric wonder no Read planes stored tached unheated garage winter garage temperatures often reach freezing otherwise least very cold Ive same house close 20 years have never temperature-related problem air borne radio equipment Electric equipment including batteries charging have routinely brought cold models normal-tempera ture shop charge radio have routinely charged motor batteries snow-covered fields however noticeable difference latter Continued page 138 rAcrylic Clear Dope glues shrinks seals coverings pArtisan Fuel Proofer spray brushdries completely clear tack-free 15 minuteswill dissolve cut paint applying super glossfinish100% brush-mark free Color Clear Feel Proofer 4ez $175 Sex $295 4oz $150 Sos $250 4o $195 Box $395 U Light Green U Orange U Grey U Aluminum U Maroon U Red U Dark Red U Sky BlueU Florescent Grange U Black U White U Cub Yellow U Brown U Tan U Green U Acrylic Clear U Artisan Fuel Proof er U NEW WING TUBE & SOCKETS NEW PermaGritTM Utetlme * Carbide Sanding Tools g p c TUNGSTEN CARBIDE GRIT-Mans hardest . erial next mond - r BRAZED TO --. -. STEEL.S 1 - made Modelers AverageFLAT TOOL 40 x 11/2 X Use e balsa hard woods .tyraffiberglassbeaded foams epoxy fillers .jr.y iglass REYOUTOTRyIT MONEY BACK GUARANTEE FOR MAIL ORDERS ONLY ONLY $6~ YOUR DEALER FIRST OR SEND FOR COMPLETE LIST OF B TOOLS SEND SSAE FOR COMPLETE LIST OF TOOLS DG PRODUCTS CO 209 Carrlands Dr Dayton OH 45429 Si3 294-1192 lOhiores addB% TaxI U Air Brush Hand brush ordering stete color size quantity Add $200 poatage IWI ree add 5% sales taxl AlTENTION ERS common experience nor mal temperatures days first flight good after first charge day doesnt seem good follow never viewed phenomenon being temperature-related often refer red warm-up However situation changes cold-storage conditions described above first charge really warm-up may second third no question about first very cold flight likely quite bit slug gish second possibly third Thereafter fingers may freezing motor battery behavior seems perfectly normal because think batteries warm hot use have forgotten cold week garage once have ex perienced significant power increase flight batteries warmed up time Id expect some drop power due normal charge depletion way winter air around best air year flying may uncomfortable cold dry dense air sure makes plane fly great Models seem light buoyant likely have significantly longer motor runs because seems plane weighs less less power expended keeping plane up power available make plane go may have guessed condition has dual opposite worst flying air thin humid hot air summer whenever models Electric affected both extremes Another incidental before leaving subject planes stored garage flight box kept inside nor mal temperatures contains lead/acid tractor-size battery fuel prefer just keep familiar temperatures guess its memories hard car starts cold mornings Finally readers loners immediate areas some areas enjoying small groups fliers just two three persons Id like encourage scattered groups few fliers consider hosting Electric Fly-in upcoming year column will help announcing intentions Dont worry about making big deal Forget events Forget prizes Forget anything sounds like work except course sending information incom ing inquiries Just make come fly us day weekend have share yourselves Electric inter ests field No doubt several loners small groups within easy traveling distance just dying find some else share interests Think over send informa tion Remember takes few months get print get moving now Happy Landings Bob Kopski 25 West End Dr Lans dale PA 19446 RC Pylon Racing/Hager Continued page 52 advanced ignition Care must taken starting engine regulate current flow through element order prevent damage Having fine element plug easily destroyed lean mixture setting state plug element good dication running conditions within engine especially useful during racing difficult distinguish sound ones own engine ele ment after race found intact undistorted mixture probably set too rich element found tact slightly distorted mixture probably -correct setting plug must changed race main tain performance element found intact found severely distorted mixture probably too lean Great care must taken using plug lean mixture setting may cause element become detached resulting irrevocable damage piston/liner cylinder head Head clearance volume available combustion chamber top dead center piston stroke directly related clearance between piston crown cylinder head squish band Continued page 140 138Model Aviation L5NAI~ hinge allows control surface removal tools Driuuv~lost pins problems PATENTpainting PENDINGcoveringrepair transportation storage etc Scale Appearance InsertSimple Assembly 3 SIZES No Slots1*4s-6 $335 38-6 $445 Rotate 900No Pins12-6 $495 EPOXY GLASS COWLS FOR NOSEN PICA SW SIORGAM BALSA USA PLATT CONCEPT FLEET HOSTETLER ACM T-CAAFT SHEBER P/iTS & SCALE SUPER CUB FOKEER 0-7 BOEING P- 72 P-2B F4B2 MBE SPARROW HAWK GEE BEE MOO Y MACBR/ENS TURBULENT CHRISTEN EAGLE BRISIGHEL LAS STAROUS TEA II A SCALE J3BI BABY FLYBABY AIRCAMPER PILOT JUAGMA N/V 735 SCALE 7/4 SCALE DECATHALON PIPER PA- YB N OTHERS WHEEL PANTS FOR C/TA BR/A STAROUS TEA II P/iTS SKYBOL T L/BERTYSPOAT CHRISTEN EAGLE PSEHAWE STEARMAN SIINSON SR-S MULLIGAN N OTHERS BRAZEDO HEAT-ThEATED WIRE GEARS& CADANES lARGE SCALE PLANS AVAILABLE Send $100 latest list supply Modelers fiberglass parts plansWrite cell us T b D FIBERGLASS SPECIALTIES 30925 BWCK GARDEN CflY MI 48735 PHONE 313 421-6356 Power Soar New Heights Send self-addressed stamped envelope catalog ap plication notes Leisure 11 Deerspring/IrvinelCA 92714 LT-50 GEAR MOTOR Leisures Gear Drive conversion 31 powerful LT-50 develops up 2 lbs static trhrust Gear Drive also features ball bearing Delrinlbrass gearing glass loaded polycarbonate housing
Edition: Model Aviation - 1985/02
Page Numbers: 48, 49, 136, 138
Radio Control Electrics Bob Kopski HAD opportunity speak Jeff Surgnier Frank Heinrich Robbe Modelisport recent KRC Electric Fly flew both days did nice job talking learned Robbe planning promote Electric products country near future Both Jeff boss Frank have very positive outlook future Electric Robbe already has number products available local hobby dealer should able get through normal distributor chan nels ask him past some Robbe products have reached dealer shelves instructions foreign language slipup will corrected future Anyone having such instructions may get some help dropping line Jeff Surgnier Suite 2D Office Center Princeton Meadows Plainsboro NJ 08536 Tell Jeff ya read MA nearly year half Ive writing largely intent helping readers get started Electric firsttime continuing success called Electric Elation Ive received lots letters commenting favorably MAs Electric series September 1983 1984 column beginning July 1984 Roughly speaking Ive received average three four letters week Often writers wanted specific additional information over what appeared various articles Interestingly enough Ive received virtually no letters between appearance November 1984 issue writing several weeks November column lot say about Electric competition no rules recommend4tion can con clude essentially no interest Electric competition surely issues controversialor least thought soand expected whole bunch pros cons burdening mailman fact got two lettersboth pro views think nearly no response~ strong evidence what Ive often said folks just trying get something Electric fly have some fun couldnt care less about competition Now want turn tables little see need some help Perhaps someone out can shed some light aerody namic matter Assuming get some help Ill pass along future column would like know better spend same total electrical power twin vs single motor other words could expect better power utilization twin total demand battery same would other wise use conventional single-motor planeall other aspects weight size etc being same does swept prop area figure inif does Long ago far away read something about cant relocate source Im asking Now thats switch different topic expression often used conjunction motors hot wind No warm July breeze Its term describing armature windingrelatively speak ing As far Im concerned term should never have used because may often imply something thats really case Lets look closely Relatively speaking hot wind means armature fewer turns wire Fewer what Fewer No Im being coyI told relative term other things ing equal motor will turn faster fewer turns wire armature fact direct proportion volvedhalf turns means twice rpm approximately before go unwinding wire motor youd better read what follows number considerations go selection motor wind ing key driver regard number battery cells product intended used nuitiber cells determines applied voltage conjunction winding count certain other constants deter48Model Aviation Sporty Electric model Dan Mittenhls second model kindl Craft weighs 36 oz uses beefed up wing tail surfaces big Comet 54-in stick-and-tissue Taylororaft kit plus original sheet-balsa fuselage Power Astro 075 either 6-cell 12 Ah 7-cell 08 Ah battery pack Control rudder elevator speed control via Jomar SC-i unit Cannon radio 6-meter frequency Dan climbs smoothly full juice eases up cruise around 67 mm pleasurable model Gus Janger Philadelphia PA uses cooling blower battery pack modified Sparky keep batteries cool being recharged Fan motor defunct tape recorder fan pair hA props mounted birdoage made %2in brazing rod modelers use small blowers type another help cool down battery pack after landing before charging next flight mines nominal rpm propeller mechanical load motor directly influences power re quired motor hence battery thus current also dic tated little increase rpm given propeller very large increase mechanical load hence large increase current drain So bit hasty broad brush neglecting things like efficiency etc should least get idea relative effects changing turns wire motors armature above example what Ive said often cant get something nothing Hot wind does get impressive flying free allows same power develop fewer cells course shorter time due increased current draw So before run off something drastic think about what consequences As far Im concerned best appli cation hot wind conjunction speed reducerseither belt drive type geared application higher-speed armature given cell count often desirable again depending range variables other appropriate application hot wind direct drive very very fast alrplane suitably-propped motor can unload maintain reasonable current draw About worst application hot wind can think direct drive naturally slow model such glider Old-Timer now have distinct impression can bit com plicated youre rightif choose make having such impres sion evidence Ive made point hot wind may what may have thought simple somethihg nothing Continued page 136 left two armatures popular Leisure LT-50 motors left isa competition wind variety other pattern wind Whats difference competition wind unit has few lessturns wire thewinding go aheadcountem Thistype often used installation having speed reducerand large high-pitched prop Youd find Glider Old-Timer Scale ship likely right clever lightweight V-tail control mixer Ken Stinsons Electric glider Servo small wood tray has dual pushrods going ruddervator surfaces suspended via four-wire swing Its mounting platform driven short pushrod fixed servo Connector used ball-and-socket type Operation very smooth friction-free H0bbV H Old Timer IvLq4 2ks Aam JJILThIL1 /lif0dL S~7LLLAaZOS 9 GAS NGOEL REcO5 8REAKE 1938 Record Breaker 96 4060 4 Strokes $6500 1938 Kioud King 63 1530 Glo/4 Stroke$4399 1941 Berkeley Brigidier 56 040-15 Gb$3690 1941 Super Quaker 79 40-45 4 Strokes$7409 1936 Buccaneer64$51 1938 Clipper ME I72$39 1937 Dallsire Sptser108$63 59lS4OEanger-49-$37 1939 Mercury72$56 1935 Miss America84$59 1941 Playboy Jr54$29 1941 Playboy Sr89-$46 1938 Powerhouse84$45 59 1940 Sailplane78$74 1940 So Long50-$29 1936 Trenton Terror72-$32 1939 Zipper54$46 1939 Korda Wakefleld44 $17 kits qualify SAM events FF & K/C feature highest quality machine cut sanded parts Superior alt Competition alt sheet sod strip mood wire window maierial Plans orig PP hut models ae easily convertible 3ch R/C Kits Gas Electric/Electric Systems & Acc 4Ks Buzzard Bombshell 72 Span R/CPP $5495 4Ks 70% Bombshell 504 Span R/C PP$3995 Hobby Horn Sensoar Glider 70 95 Electric $1690 Midway Model Past Eddie Acrobatic/OS Elect $2000 Midway Model Gnome K/C Hand Launch Glid $3495 Leisure Playboy Sr LT-56 Geared Electric$3000 Jolly Electricus Glider 05/LT-50 Electric $3250 Astro Cobalt 05 System 7 Cell Direct$11309 Astro Cobalt Geared 2 1 System $14709 Leisure LTS0 Girect 6 Cell $40 7 Cell $5009 Leisure LT59 Geared 25 1 6 Cell$6500 Astro Sport improved 95 Direct $1800 Leisure Wasn LT55 --- -$2300 - -- auorsBeooastca SHIPPING & HANDLING 64 Page CATALOGUE Up $800 add $150$200 PP/lst Class $801 $2009 add $225 copy will sent $3091 $4596 add $306 free-when requested$4501 $7060 add $350 a-n ord over $7090 add $406HOBBY HGRN CA Addressees add 6% tax 15173 Moran St [A] Send MO Visa/MC#ExpPO Box 2212 Check allow up tO 50Westminster Ca 92684 days CK clearance 714 893-8311 COD Exact Charges plus $150 HdI Cash OnlyAft Hrs 714 8851203 February 198549 0 TIGER TAIL 4 Ron Chidgelis latest best series little larger lighter slower retains honest flight character tistics its predecessors Especially recommended sportsman ad vanced pattern also good choice turn-around pattern Plans ahd construction hints -$995 WELLER 3 BLADE PROP very stiff molded fiberglas propellor England ta efficient design allows substantial reduction noise level actually improving per formance $2000 NEW CLAMP IT FOREVER STAINLESS STEEL PIPE CLAMPS Lrght strong Low-profile selfiocking 3116 width wont cut silicone couplers Pkg 4 clamps $295 RC Old-Timers/Mathews Continued page 133 relatively inexpensive easy-to-build fun-to-fly little rascals absolutely perfect first Old-Timer subjects would anticipate event may finally make point Free Flight frater nity adding RC Free Flight model reduce retrieving problems add usable flying sites sacrilege Interestingly since motor runs timid function much fuel can squeeze Black Widow tank two completely divergent approavh es haye evolved group favors high nitro small props gain lots altitude two three minutes motor run other NEW Sleeve Puller $795 BearIng Puller $695 1 dia aluminum alloy tubing plug-in wings Included pair ot special slip-fit phenolic sockets build wing-structure 2024 alum tube 24 long socket 12 long 589SIset ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily damage Cone cone expanding brass ring grips sleeve bearing ID new 60s 17MM rear bearing * Special * Both $1395 See Dealer Order Direct Include 75 Per Item UPS GP Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-863g favors low nitro 8 x 3 larger props seven- eight-minute motor runs Frankly 15-minute maxes seems better off long runs high-fast approach depends thermals flight slow-low seemingly assures least 10 minutes no lift just little 'help' 15-minute max well within reach obtain long engine runs mod ifications such twoor three head gaskets l0o nitro fuel 8 x 4 8 x 6 props used Needle settings become very critical regular heads may necessary look through large batch Black Widows before properly-fitted fouhd Front bearing slop absolute nono Most also modifying fuel pickup original plastic J-shaped section Yn2 ID brass aluminum tubing East side west side Since 1985 SAM Champs held California AMA Nats Massachusetts RC OldTimer nuts either coast being given chance attend major meets next sum mer middle country can choose attend both 1986 sfiould see reverse setup 1987 SAM Champs would Mid west Ill bet Fort Worth Plainsmen could host super SAM Champs what feel premier site Free Flight RC-Assist amid Acres about Texans Dee B Mathews 8420 Nantucket Wichita KS 67212 responding advertisers mention read about Model Aviation RC Electrics/Kopski Continued page 49 Since personally fly mostly direct drive have little interest hot winds Id much prefer stay reasonable winding select cell count prop size job hand Im happy report Astro has recent ly added bit winding several thefr motors Given option Id always take larger slower direct-drive prop smaller faster kinds models fly realize discussion bit cram sessiofl everything may totally clear everyone Depending reader reaction may get future columns Another new topic time col umn appears will dead winter some places like live means cold temperatures other unpleas antness such frost snow etc Included list less flying doesnt mean no flying cause theres no basic reason Electric cant flown under such conditions So youve won dering about effects cold Electric wonder no Read planes stored tached unheated garage winter garage temperatures often reach freezing otherwise least very cold Ive same house close 20 years have never temperature-related problem air borne radio equipment Electric equipment including batteries charging have routinely brought cold models normal-tempera ture shop charge radio have routinely charged motor batteries snow-covered fields however noticeable difference latter Continued page 138 rAcrylic Clear Dope glues shrinks seals coverings pArtisan Fuel Proofer spray brushdries completely clear tack-free 15 minuteswill dissolve cut paint applying super glossfinish100% brush-mark free Color Clear Feel Proofer 4ez $175 Sex $295 4oz $150 Sos $250 4o $195 Box $395 U Light Green U Orange U Grey U Aluminum U Maroon U Red U Dark Red U Sky BlueU Florescent Grange U Black U White U Cub Yellow U Brown U Tan U Green U Acrylic Clear U Artisan Fuel Proof er U NEW WING TUBE & SOCKETS NEW PermaGritTM Utetlme * Carbide Sanding Tools g p c TUNGSTEN CARBIDE GRIT-Mans hardest . erial next mond - r BRAZED TO --. -. STEEL.S 1 - made Modelers AverageFLAT TOOL 40 x 11/2 X Use e balsa hard woods .tyraffiberglassbeaded foams epoxy fillers .jr.y iglass REYOUTOTRyIT MONEY BACK GUARANTEE FOR MAIL ORDERS ONLY ONLY $6~ YOUR DEALER FIRST OR SEND FOR COMPLETE LIST OF B TOOLS SEND SSAE FOR COMPLETE LIST OF TOOLS DG PRODUCTS CO 209 Carrlands Dr Dayton OH 45429 Si3 294-1192 lOhiores addB% TaxI U Air Brush Hand brush ordering stete color size quantity Add $200 poatage IWI ree add 5% sales taxl AlTENTION ERS common experience nor mal temperatures days first flight good after first charge day doesnt seem good follow never viewed phenomenon being temperature-related often refer red warm-up However situation changes cold-storage conditions described above first charge really warm-up may second third no question about first very cold flight likely quite bit slug gish second possibly third Thereafter fingers may freezing motor battery behavior seems perfectly normal because think batteries warm hot use have forgotten cold week garage once have ex perienced significant power increase flight batteries warmed up time Id expect some drop power due normal charge depletion way winter air around best air year flying may uncomfortable cold dry dense air sure makes plane fly great Models seem light buoyant likely have significantly longer motor runs because seems plane weighs less less power expended keeping plane up power available make plane go may have guessed condition has dual opposite worst flying air thin humid hot air summer whenever models Electric affected both extremes Another incidental before leaving subject planes stored garage flight box kept inside nor mal temperatures contains lead/acid tractor-size battery fuel prefer just keep familiar temperatures guess its memories hard car starts cold mornings Finally readers loners immediate areas some areas enjoying small groups fliers just two three persons Id like encourage scattered groups few fliers consider hosting Electric Fly-in upcoming year column will help announcing intentions Dont worry about making big deal Forget events Forget prizes Forget anything sounds like work except course sending information incom ing inquiries Just make come fly us day weekend have share yourselves Electric inter ests field No doubt several loners small groups within easy traveling distance just dying find some else share interests Think over send informa tion Remember takes few months get print get moving now Happy Landings Bob Kopski 25 West End Dr Lans dale PA 19446 RC Pylon Racing/Hager Continued page 52 advanced ignition Care must taken starting engine regulate current flow through element order prevent damage Having fine element plug easily destroyed lean mixture setting state plug element good dication running conditions within engine especially useful during racing difficult distinguish sound ones own engine ele ment after race found intact undistorted mixture probably set too rich element found tact slightly distorted mixture probably -correct setting plug must changed race main tain performance element found intact found severely distorted mixture probably too lean Great care must taken using plug lean mixture setting may cause element become detached resulting irrevocable damage piston/liner cylinder head Head clearance volume available combustion chamber top dead center piston stroke directly related clearance between piston crown cylinder head squish band Continued page 140 138Model Aviation L5NAI~ hinge allows control surface removal tools Driuuv~lost pins problems PATENTpainting PENDINGcoveringrepair transportation storage etc Scale Appearance InsertSimple Assembly 3 SIZES No Slots1*4s-6 $335 38-6 $445 Rotate 900No Pins12-6 $495 EPOXY GLASS COWLS FOR NOSEN PICA SW SIORGAM BALSA USA PLATT CONCEPT FLEET HOSTETLER ACM T-CAAFT SHEBER P/iTS & SCALE SUPER CUB FOKEER 0-7 BOEING P- 72 P-2B F4B2 MBE SPARROW HAWK GEE BEE MOO Y MACBR/ENS TURBULENT CHRISTEN EAGLE BRISIGHEL LAS STAROUS TEA II A SCALE J3BI BABY FLYBABY AIRCAMPER PILOT JUAGMA N/V 735 SCALE 7/4 SCALE DECATHALON PIPER PA- YB N OTHERS WHEEL PANTS FOR C/TA BR/A STAROUS TEA II P/iTS SKYBOL T L/BERTYSPOAT CHRISTEN EAGLE PSEHAWE STEARMAN SIINSON SR-S MULLIGAN N OTHERS BRAZEDO HEAT-ThEATED WIRE GEARS& CADANES lARGE SCALE PLANS AVAILABLE Send $100 latest list supply Modelers fiberglass parts plansWrite cell us T b D FIBERGLASS SPECIALTIES 30925 BWCK GARDEN CflY MI 48735 PHONE 313 421-6356 Power Soar New Heights Send self-addressed stamped envelope catalog ap plication notes Leisure 11 Deerspring/IrvinelCA 92714 LT-50 GEAR MOTOR Leisures Gear Drive conversion 31 powerful LT-50 develops up 2 lbs static trhrust Gear Drive also features ball bearing Delrinlbrass gearing glass loaded polycarbonate housing
Edition: Model Aviation - 1985/02
Page Numbers: 48, 49, 136, 138
Radio Control Electrics Bob Kopski HAD opportunity speak Jeff Surgnier Frank Heinrich Robbe Modelisport recent KRC Electric Fly flew both days did nice job talking learned Robbe planning promote Electric products country near future Both Jeff boss Frank have very positive outlook future Electric Robbe already has number products available local hobby dealer should able get through normal distributor chan nels ask him past some Robbe products have reached dealer shelves instructions foreign language slipup will corrected future Anyone having such instructions may get some help dropping line Jeff Surgnier Suite 2D Office Center Princeton Meadows Plainsboro NJ 08536 Tell Jeff ya read MA nearly year half Ive writing largely intent helping readers get started Electric firsttime continuing success called Electric Elation Ive received lots letters commenting favorably MAs Electric series September 1983 1984 column beginning July 1984 Roughly speaking Ive received average three four letters week Often writers wanted specific additional information over what appeared various articles Interestingly enough Ive received virtually no letters between appearance November 1984 issue writing several weeks November column lot say about Electric competition no rules recommend4tion can con clude essentially no interest Electric competition surely issues controversialor least thought soand expected whole bunch pros cons burdening mailman fact got two lettersboth pro views think nearly no response~ strong evidence what Ive often said folks just trying get something Electric fly have some fun couldnt care less about competition Now want turn tables little see need some help Perhaps someone out can shed some light aerody namic matter Assuming get some help Ill pass along future column would like know better spend same total electrical power twin vs single motor other words could expect better power utilization twin total demand battery same would other wise use conventional single-motor planeall other aspects weight size etc being same does swept prop area figure inif does Long ago far away read something about cant relocate source Im asking Now thats switch different topic expression often used conjunction motors hot wind No warm July breeze Its term describing armature windingrelatively speak ing As far Im concerned term should never have used because may often imply something thats really case Lets look closely Relatively speaking hot wind means armature fewer turns wire Fewer what Fewer No Im being coyI told relative term other things ing equal motor will turn faster fewer turns wire armature fact direct proportion volvedhalf turns means twice rpm approximately before go unwinding wire motor youd better read what follows number considerations go selection motor wind ing key driver regard number battery cells product intended used nuitiber cells determines applied voltage conjunction winding count certain other constants deter48Model Aviation Sporty Electric model Dan Mittenhls second model kindl Craft weighs 36 oz uses beefed up wing tail surfaces big Comet 54-in stick-and-tissue Taylororaft kit plus original sheet-balsa fuselage Power Astro 075 either 6-cell 12 Ah 7-cell 08 Ah battery pack Control rudder elevator speed control via Jomar SC-i unit Cannon radio 6-meter frequency Dan climbs smoothly full juice eases up cruise around 67 mm pleasurable model Gus Janger Philadelphia PA uses cooling blower battery pack modified Sparky keep batteries cool being recharged Fan motor defunct tape recorder fan pair hA props mounted birdoage made %2in brazing rod modelers use small blowers type another help cool down battery pack after landing before charging next flight mines nominal rpm propeller mechanical load motor directly influences power re quired motor hence battery thus current also dic tated little increase rpm given propeller very large increase mechanical load hence large increase current drain So bit hasty broad brush neglecting things like efficiency etc should least get idea relative effects changing turns wire motors armature above example what Ive said often cant get something nothing Hot wind does get impressive flying free allows same power develop fewer cells course shorter time due increased current draw So before run off something drastic think about what consequences As far Im concerned best appli cation hot wind conjunction speed reducerseither belt drive type geared application higher-speed armature given cell count often desirable again depending range variables other appropriate application hot wind direct drive very very fast alrplane suitably-propped motor can unload maintain reasonable current draw About worst application hot wind can think direct drive naturally slow model such glider Old-Timer now have distinct impression can bit com plicated youre rightif choose make having such impres sion evidence Ive made point hot wind may what may have thought simple somethihg nothing Continued page 136 left two armatures popular Leisure LT-50 motors left isa competition wind variety other pattern wind Whats difference competition wind unit has few lessturns wire thewinding go aheadcountem Thistype often used installation having speed reducerand large high-pitched prop Youd find Glider Old-Timer Scale ship likely right clever lightweight V-tail control mixer Ken Stinsons Electric glider Servo small wood tray has dual pushrods going ruddervator surfaces suspended via four-wire swing Its mounting platform driven short pushrod fixed servo Connector used ball-and-socket type Operation very smooth friction-free H0bbV H Old Timer IvLq4 2ks Aam JJILThIL1 /lif0dL S~7LLLAaZOS 9 GAS NGOEL REcO5 8REAKE 1938 Record Breaker 96 4060 4 Strokes $6500 1938 Kioud King 63 1530 Glo/4 Stroke$4399 1941 Berkeley Brigidier 56 040-15 Gb$3690 1941 Super Quaker 79 40-45 4 Strokes$7409 1936 Buccaneer64$51 1938 Clipper ME I72$39 1937 Dallsire Sptser108$63 59lS4OEanger-49-$37 1939 Mercury72$56 1935 Miss America84$59 1941 Playboy Jr54$29 1941 Playboy Sr89-$46 1938 Powerhouse84$45 59 1940 Sailplane78$74 1940 So Long50-$29 1936 Trenton Terror72-$32 1939 Zipper54$46 1939 Korda Wakefleld44 $17 kits qualify SAM events FF & K/C feature highest quality machine cut sanded parts Superior alt Competition alt sheet sod strip mood wire window maierial Plans orig PP hut models ae easily convertible 3ch R/C Kits Gas Electric/Electric Systems & Acc 4Ks Buzzard Bombshell 72 Span R/CPP $5495 4Ks 70% Bombshell 504 Span R/C PP$3995 Hobby Horn Sensoar Glider 70 95 Electric $1690 Midway Model Past Eddie Acrobatic/OS Elect $2000 Midway Model Gnome K/C Hand Launch Glid $3495 Leisure Playboy Sr LT-56 Geared Electric$3000 Jolly Electricus Glider 05/LT-50 Electric $3250 Astro Cobalt 05 System 7 Cell Direct$11309 Astro Cobalt Geared 2 1 System $14709 Leisure LTS0 Girect 6 Cell $40 7 Cell $5009 Leisure LT59 Geared 25 1 6 Cell$6500 Astro Sport improved 95 Direct $1800 Leisure Wasn LT55 --- -$2300 - -- auorsBeooastca SHIPPING & HANDLING 64 Page CATALOGUE Up $800 add $150$200 PP/lst Class $801 $2009 add $225 copy will sent $3091 $4596 add $306 free-when requested$4501 $7060 add $350 a-n ord over $7090 add $406HOBBY HGRN CA Addressees add 6% tax 15173 Moran St [A] Send MO Visa/MC#ExpPO Box 2212 Check allow up tO 50Westminster Ca 92684 days CK clearance 714 893-8311 COD Exact Charges plus $150 HdI Cash OnlyAft Hrs 714 8851203 February 198549 0 TIGER TAIL 4 Ron Chidgelis latest best series little larger lighter slower retains honest flight character tistics its predecessors Especially recommended sportsman ad vanced pattern also good choice turn-around pattern Plans ahd construction hints -$995 WELLER 3 BLADE PROP very stiff molded fiberglas propellor England ta efficient design allows substantial reduction noise level actually improving per formance $2000 NEW CLAMP IT FOREVER STAINLESS STEEL PIPE CLAMPS Lrght strong Low-profile selfiocking 3116 width wont cut silicone couplers Pkg 4 clamps $295 RC Old-Timers/Mathews Continued page 133 relatively inexpensive easy-to-build fun-to-fly little rascals absolutely perfect first Old-Timer subjects would anticipate event may finally make point Free Flight frater nity adding RC Free Flight model reduce retrieving problems add usable flying sites sacrilege Interestingly since motor runs timid function much fuel can squeeze Black Widow tank two completely divergent approavh es haye evolved group favors high nitro small props gain lots altitude two three minutes motor run other NEW Sleeve Puller $795 BearIng Puller $695 1 dia aluminum alloy tubing plug-in wings Included pair ot special slip-fit phenolic sockets build wing-structure 2024 alum tube 24 long socket 12 long 589SIset ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily damage Cone cone expanding brass ring grips sleeve bearing ID new 60s 17MM rear bearing * Special * Both $1395 See Dealer Order Direct Include 75 Per Item UPS GP Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-863g favors low nitro 8 x 3 larger props seven- eight-minute motor runs Frankly 15-minute maxes seems better off long runs high-fast approach depends thermals flight slow-low seemingly assures least 10 minutes no lift just little 'help' 15-minute max well within reach obtain long engine runs mod ifications such twoor three head gaskets l0o nitro fuel 8 x 4 8 x 6 props used Needle settings become very critical regular heads may necessary look through large batch Black Widows before properly-fitted fouhd Front bearing slop absolute nono Most also modifying fuel pickup original plastic J-shaped section Yn2 ID brass aluminum tubing East side west side Since 1985 SAM Champs held California AMA Nats Massachusetts RC OldTimer nuts either coast being given chance attend major meets next sum mer middle country can choose attend both 1986 sfiould see reverse setup 1987 SAM Champs would Mid west Ill bet Fort Worth Plainsmen could host super SAM Champs what feel premier site Free Flight RC-Assist amid Acres about Texans Dee B Mathews 8420 Nantucket Wichita KS 67212 responding advertisers mention read about Model Aviation RC Electrics/Kopski Continued page 49 Since personally fly mostly direct drive have little interest hot winds Id much prefer stay reasonable winding select cell count prop size job hand Im happy report Astro has recent ly added bit winding several thefr motors Given option Id always take larger slower direct-drive prop smaller faster kinds models fly realize discussion bit cram sessiofl everything may totally clear everyone Depending reader reaction may get future columns Another new topic time col umn appears will dead winter some places like live means cold temperatures other unpleas antness such frost snow etc Included list less flying doesnt mean no flying cause theres no basic reason Electric cant flown under such conditions So youve won dering about effects cold Electric wonder no Read planes stored tached unheated garage winter garage temperatures often reach freezing otherwise least very cold Ive same house close 20 years have never temperature-related problem air borne radio equipment Electric equipment including batteries charging have routinely brought cold models normal-tempera ture shop charge radio have routinely charged motor batteries snow-covered fields however noticeable difference latter Continued page 138 rAcrylic Clear Dope glues shrinks seals coverings pArtisan Fuel Proofer spray brushdries completely clear tack-free 15 minuteswill dissolve cut paint applying super glossfinish100% brush-mark free Color Clear Feel Proofer 4ez $175 Sex $295 4oz $150 Sos $250 4o $195 Box $395 U Light Green U Orange U Grey U Aluminum U Maroon U Red U Dark Red U Sky BlueU Florescent Grange U Black U White U Cub Yellow U Brown U Tan U Green U Acrylic Clear U Artisan Fuel Proof er U NEW WING TUBE & SOCKETS NEW PermaGritTM Utetlme * Carbide Sanding Tools g p c TUNGSTEN CARBIDE GRIT-Mans hardest . erial next mond - r BRAZED TO --. -. STEEL.S 1 - made Modelers AverageFLAT TOOL 40 x 11/2 X Use e balsa hard woods .tyraffiberglassbeaded foams epoxy fillers .jr.y iglass REYOUTOTRyIT MONEY BACK GUARANTEE FOR MAIL ORDERS ONLY ONLY $6~ YOUR DEALER FIRST OR SEND FOR COMPLETE LIST OF B TOOLS SEND SSAE FOR COMPLETE LIST OF TOOLS DG PRODUCTS CO 209 Carrlands Dr Dayton OH 45429 Si3 294-1192 lOhiores addB% TaxI U Air Brush Hand brush ordering stete color size quantity Add $200 poatage IWI ree add 5% sales taxl AlTENTION ERS common experience nor mal temperatures days first flight good after first charge day doesnt seem good follow never viewed phenomenon being temperature-related often refer red warm-up However situation changes cold-storage conditions described above first charge really warm-up may second third no question about first very cold flight likely quite bit slug gish second possibly third Thereafter fingers may freezing motor battery behavior seems perfectly normal because think batteries warm hot use have forgotten cold week garage once have ex perienced significant power increase flight batteries warmed up time Id expect some drop power due normal charge depletion way winter air around best air year flying may uncomfortable cold dry dense air sure makes plane fly great Models seem light buoyant likely have significantly longer motor runs because seems plane weighs less less power expended keeping plane up power available make plane go may have guessed condition has dual opposite worst flying air thin humid hot air summer whenever models Electric affected both extremes Another incidental before leaving subject planes stored garage flight box kept inside nor mal temperatures contains lead/acid tractor-size battery fuel prefer just keep familiar temperatures guess its memories hard car starts cold mornings Finally readers loners immediate areas some areas enjoying small groups fliers just two three persons Id like encourage scattered groups few fliers consider hosting Electric Fly-in upcoming year column will help announcing intentions Dont worry about making big deal Forget events Forget prizes Forget anything sounds like work except course sending information incom ing inquiries Just make come fly us day weekend have share yourselves Electric inter ests field No doubt several loners small groups within easy traveling distance just dying find some else share interests Think over send informa tion Remember takes few months get print get moving now Happy Landings Bob Kopski 25 West End Dr Lans dale PA 19446 RC Pylon Racing/Hager Continued page 52 advanced ignition Care must taken starting engine regulate current flow through element order prevent damage Having fine element plug easily destroyed lean mixture setting state plug element good dication running conditions within engine especially useful during racing difficult distinguish sound ones own engine ele ment after race found intact undistorted mixture probably set too rich element found tact slightly distorted mixture probably -correct setting plug must changed race main tain performance element found intact found severely distorted mixture probably too lean Great care must taken using plug lean mixture setting may cause element become detached resulting irrevocable damage piston/liner cylinder head Head clearance volume available combustion chamber top dead center piston stroke directly related clearance between piston crown cylinder head squish band Continued page 140 138Model Aviation L5NAI~ hinge allows control surface removal tools Driuuv~lost pins problems PATENTpainting PENDINGcoveringrepair transportation storage etc Scale Appearance InsertSimple Assembly 3 SIZES No Slots1*4s-6 $335 38-6 $445 Rotate 900No Pins12-6 $495 EPOXY GLASS COWLS FOR NOSEN PICA SW SIORGAM BALSA USA PLATT CONCEPT FLEET HOSTETLER ACM T-CAAFT SHEBER P/iTS & SCALE SUPER CUB FOKEER 0-7 BOEING P- 72 P-2B F4B2 MBE SPARROW HAWK GEE BEE MOO Y MACBR/ENS TURBULENT CHRISTEN EAGLE BRISIGHEL LAS STAROUS TEA II A SCALE J3BI BABY FLYBABY AIRCAMPER PILOT JUAGMA N/V 735 SCALE 7/4 SCALE DECATHALON PIPER PA- YB N OTHERS WHEEL PANTS FOR C/TA BR/A STAROUS TEA II P/iTS SKYBOL T L/BERTYSPOAT CHRISTEN EAGLE PSEHAWE STEARMAN SIINSON SR-S MULLIGAN N OTHERS BRAZEDO HEAT-ThEATED WIRE GEARS& CADANES lARGE SCALE PLANS AVAILABLE Send $100 latest list supply Modelers fiberglass parts plansWrite cell us T b D FIBERGLASS SPECIALTIES 30925 BWCK GARDEN CflY MI 48735 PHONE 313 421-6356 Power Soar New Heights Send self-addressed stamped envelope catalog ap plication notes Leisure 11 Deerspring/IrvinelCA 92714 LT-50 GEAR MOTOR Leisures Gear Drive conversion 31 powerful LT-50 develops up 2 lbs static trhrust Gear Drive also features ball bearing Delrinlbrass gearing glass loaded polycarbonate housing