A FEW MONTHS AGO did fill-in column Larry Jolly took look some standard features basic Helicopter radio described fea tures needed use Now well take look some may look complex switches knobs higherend Helicopter ra dios lot make flying easier smoother U Paul Tradelius Futaba PCM-8 Airtronics Module Helicopter Radio represent two certainly state-of-the-art radios loaded lots bells whistles improve flying Advanced Hell Radios Left A hover throttle trim four warning lights below meter just some extras offered Futaba Right Airtronics clocklstopwatch two warning lights left meter help make Helicopter flying safer taking out some guesswork 50 Model Aviation advanced features capabilities top-of-the-line Helicopter radios im prove models performance flying enjoyment Certainly better radios will have features men tioned will have themand article will give idea features important decided give Helicopters try several years ago wanted get started least initial expense used air plane radio already see passing fad wasnt long before knew wanted continue fly ing Helicopters airplane radio lot drawbacks purchased basic Heli copter radio flying really improved added features new radio soon felt fly ing progressed point ready advanced aerobatics would need top-of-the-line Heli radio Unfortunately advertisements various Heli radios did explain special features have quite surprised read through instruc tion manual saw what miss ing features very happy haveand sure could have used before known about bet ter radios probably would have purchased lot sooner Im suggesting need run out buy expensive radio enjoy fly ing Helicopters think should take closer look advanced features top-of-the-line units may make flying safer whole lot enjoyable Second idle up earlier article de scribed basic idle up function use top radios also have second idle up give flexibil ity controlling throttle various ma neuvers example use first idle up normal inverted flying landing pattern keep up rotor speed during descents second idle up set almost full power very fast forward flight aerobatics must have very high rotor rpm throughout entire collec tive range Having second idle up lets fine tune rotor rpm either normal flying aerobatics making sacrifi ces between two Multiple pitch curves also described basic pitch curve adjustments before having second pitch curve provides capability fine tune collective range different maneuvers Lets suppose first pitch curve adjusted give optimum performance Helicopter engine Left Both Idle up switches Futaba PCM located within easy reach trim knob side adjusting collective hover Right Two pitch curves available switch Airtronics Module radio Collective trim side adjusts easily flying March 1988 51 Both Futaba PCM left Airtronics Module right Helicopter Systems offer mul titude adjustments fine tune Helicopter maximum performance easier flying Airtronlcs hover memory hovering throttle trim helpful simple use Designed Henry Piorun Former Canadian National Champion & FAI Canadian Team Member Designed SpeQiflcally FAI Pattern Flying Perform Equally Well Other AMA Classes 54 wing span 7I 5 lb weight NOaq Ii 919 291-8548 Fiberglass Fuselage molded wIng Joiner tube Plug-la WIngs Fiberglass Belly Pan OptIonal PlastIc Fiberglass Canopy Pre-Cut Holes Wlng Joiner Tubes UltralIght Honeycomb Wlngcors extra $35 Send check money order HIGH PERFORMANCE MODELS 9558 116ASt North Delta British Columbia V4C 6Z4 Canada Basic Kit $12500 Pre-Built Kit $32500 604-588-0605 RADIO Radio trouble? Hobby Radio offers professional R/C repaire modifications make R/C equipment produced last 25 years Complete system service battery pack servoa vibration testing new journal including diagrams charts detailed frequency change etc Also R/Cer likes doit yourself Hobby Radio Volume 142 page modifications written simple understandable text Send $1995 Hobby Radio 3001-A Ravanaugh Rd Wilson NC 27893 legal size ease price list complete services YOUR R/C SPECIALIST normal flying usually means maximum pitch about 70 minimum pitch about ical maximum pitch 70 because using much pitch can overload engine cause overheat quit practice autorotation landings max imum pitch 100 will needed provide sufficient lift rotor speed decreases during flare So theres choice adjust pitch range nor mal flying lose autorotation capability set greater pitch autorota tions take chance overtaxing en gine too much pitch normal flight choices until sec ond pitch curve added provides capability flip switch have optimum pitch settings both normal flying autorotations As place start would recommend pitch range 2o 70 normal flying second pitch curve set ..40 100 autorota tions good approximation num bers may need changed slightly depending particular Helicopter flying style etc Exponential VTR exponential function best described referring Fig 1 Lets say graph right cyclic aileron horizontal axis repre sents movement control stick away neutral center position verti cal axis represents servo movement center position bottom scale maximum servo throw top As stick moved right notice initially very little servo move ment Point during second half stick movement servo catches up give full throw Point B gives us soft center improve stability smoothness yet makes full throw servo available needed trim ad justment also included adjust shape curve less softness flatter curve approaching straight line will make servo throw equal stick movement increasing curvature line will give softer center Futaba offers similar type softness around neutral call Variable Trace Ratio VTR shown Fig 2 Notice curve replaced two straight lines angle between lines determined trim pot overall ef fect very similar exponential func tion Hovering throttle collective trims Because average flier spends major ity time hovering some radios offer two separate trims fine tune collective throttle settings independent other other controls give optimum hover performance Although two separate trim functions its important re member direct relationship tween hovering throttle rpm really rotor rpm amount collective hoverContinued page 155 52 Model Aviation HIGH PERFORMANCE MODELS presents theWORLD CHAMPIONS AUGUST1987 Bob Whit Model #22 CHAMPION RUBBER BROUGHT HOME THE WAKEFIELD CUP CHAMPION RUBBER 3132 1183118 & 114 widths 042 thick $125011b box* Catalog-Si 00 CHAMPION MODEL PRODUCTS 880 Carmen Ct. La Verne CA 91750 714 599-3348 Cal Raa inciudaa US delivery via UP8Add Sales Tax HOBBY chairs aforementioned tool table bird will much better careful attention Thats month Keep black-andwhite photos acomin really appreciate model pictures use possi ble column Hell Radios/Tradelius Continued page 52 Lets suppose Helicopter hover collective/throttle stick mid range position engine rpm needs increased adjusting hovering throttle trim rotor rpm can increased affecting idle full-power set tings rotor rpm increased ever no change collective made Helicopter will begin climb keep climbing collective stick its mid-range position collec tive has re-trimmed case re duced pitch slightly compensate higher rotor speed can see two trim functions work together opposite other give finer control both hover rotor speed collective stick position Hover memory basic functions Helicopter radio covered column several months ago pro vide tail rotor compensation power collective changed hover settings does radio know Helicopter hover Without hov er memory feature radio must assume Heli hover throttle/col lective stick mid-point position hover memory feature however Helicopter brought hover memory feature turned allow radio memorize hover settings radio applies other mixing func tions such tail rotor compensation point especially good after using hover throttle collective trims mentioned above because may like hover throttle/collective stick out its mid-range position Warning lights Now several switches have added increased capabilities top-of-the-line radio its also easier have switches wrong position Thats warn ing lights very useful Several transmitters have red LED light-emitting diode displays illuminated power switch turned partic ular function monitoring turned will go steady light flash ing tradeoff always needed between size light amount battery operate warning lights rather small hard see direct day light Nonetheless add extra mar gin safety flying Clocks timers Closely related warning lights clocks timers keep track transmitter-on time flight time usually LCD liquid crystal displays require very little battery power give digital read-out time day transmitter-on time count up down timers flight time combination However display should protected exposure direct sunlight long periods prevent display fading seems newer radios especially PCM units require battery power older sets therefore may operate long single charge clocks stopwatches therefore use ful function keep us safe side battery limits though seems like have covered lot Helicopter functions between ar ticle previous still things individual manufac turers have supplied radios havent mentioned terested radios suggest find someone has can see goodies firsthandor write manufacturer importer owners manual list features etc Also top-of-the-line radios can expect higherquality components throughout radio including case switches control sticks appearance trim pots etc take closer look what additional cost brings flying enjoyment capabilities may well decide have its Bowman Horsham PA thinks part problem subsonic buffoons positions leadership bow scrape RC det riment meaningful Junior program Ed Lowe Holdingford MN opines avia tion has lost mystique excitement kids kids big dream get ride airplane Carl Fries NFFS founder thinks part decline FF due fact people dont know about what hobby shops going higher-profit RC items pay rent feels should shoot 24-35 age group can get Out distant flying fields FF now taking place Bill Miller Fairfield CT would like see simple Scale models market available kids sort order old 1OC-to-25C Megow models cites Jack Fikes Scale Flight kits Canadian Easybuilt line helping counts Bill Morez San Marcos CA has helped dozens Junior types over years noted stuck hobby maybe just have accept thing forever kids today listen different music have different heroes should allowed find own special joy figures pleasure Out sunshine model enough him Plenty food thought Until somebody does come up philoso phy well agree lets keep dis cussion going shall personally owe Free Flight Scale modeling far can ever repay lifetime am personally willing see go quiet grave Hannans Runway PO Box Escondido CA 92025 has couple things stock think might interest now list plastic ra dial engine kits suitable Peanut Scale models nine-cylinder P&W Wasp 14-cylinder Wasp nine-cylinder Wright $249 also cany hard-tofind five-cylinder packs plastic cylinders do-it-yourselfers % ne-inch scales also carry WW Golden Age wheels 34 1 1-in diameters can get -lb box A6 /32 /8-in FAI rubber autogiro tie tack rubber stamp Waco cabin ship Vic Smeads great Fifty Years March 1988 155 worth investment have best radio available FF Scale/Warner Continued page 55
Edition: Model Aviation - 1988/03
Page Numbers: 50, 51, 52, 155
Edition: Model Aviation - 1988/03
Page Numbers: 50, 51, 52, 155
A FEW MONTHS AGO did fill-in column Larry Jolly took look some standard features basic Helicopter radio described fea tures needed use Now well take look some may look complex switches knobs higherend Helicopter ra dios lot make flying easier smoother U Paul Tradelius Futaba PCM-8 Airtronics Module Helicopter Radio represent two certainly state-of-the-art radios loaded lots bells whistles improve flying Advanced Hell Radios Left A hover throttle trim four warning lights below meter just some extras offered Futaba Right Airtronics clocklstopwatch two warning lights left meter help make Helicopter flying safer taking out some guesswork 50 Model Aviation advanced features capabilities top-of-the-line Helicopter radios im prove models performance flying enjoyment Certainly better radios will have features men tioned will have themand article will give idea features important decided give Helicopters try several years ago wanted get started least initial expense used air plane radio already see passing fad wasnt long before knew wanted continue fly ing Helicopters airplane radio lot drawbacks purchased basic Heli copter radio flying really improved added features new radio soon felt fly ing progressed point ready advanced aerobatics would need top-of-the-line Heli radio Unfortunately advertisements various Heli radios did explain special features have quite surprised read through instruc tion manual saw what miss ing features very happy haveand sure could have used before known about bet ter radios probably would have purchased lot sooner Im suggesting need run out buy expensive radio enjoy fly ing Helicopters think should take closer look advanced features top-of-the-line units may make flying safer whole lot enjoyable Second idle up earlier article de scribed basic idle up function use top radios also have second idle up give flexibil ity controlling throttle various ma neuvers example use first idle up normal inverted flying landing pattern keep up rotor speed during descents second idle up set almost full power very fast forward flight aerobatics must have very high rotor rpm throughout entire collec tive range Having second idle up lets fine tune rotor rpm either normal flying aerobatics making sacrifi ces between two Multiple pitch curves also described basic pitch curve adjustments before having second pitch curve provides capability fine tune collective range different maneuvers Lets suppose first pitch curve adjusted give optimum performance Helicopter engine Left Both Idle up switches Futaba PCM located within easy reach trim knob side adjusting collective hover Right Two pitch curves available switch Airtronics Module radio Collective trim side adjusts easily flying March 1988 51 Both Futaba PCM left Airtronics Module right Helicopter Systems offer mul titude adjustments fine tune Helicopter maximum performance easier flying Airtronlcs hover memory hovering throttle trim helpful simple use Designed Henry Piorun Former Canadian National Champion & FAI Canadian Team Member Designed SpeQiflcally FAI Pattern Flying Perform Equally Well Other AMA Classes 54 wing span 7I 5 lb weight NOaq Ii 919 291-8548 Fiberglass Fuselage molded wIng Joiner tube Plug-la WIngs Fiberglass Belly Pan OptIonal PlastIc Fiberglass Canopy Pre-Cut Holes Wlng Joiner Tubes UltralIght Honeycomb Wlngcors extra $35 Send check money order HIGH PERFORMANCE MODELS 9558 116ASt North Delta British Columbia V4C 6Z4 Canada Basic Kit $12500 Pre-Built Kit $32500 604-588-0605 RADIO Radio trouble? Hobby Radio offers professional R/C repaire modifications make R/C equipment produced last 25 years Complete system service battery pack servoa vibration testing new journal including diagrams charts detailed frequency change etc Also R/Cer likes doit yourself Hobby Radio Volume 142 page modifications written simple understandable text Send $1995 Hobby Radio 3001-A Ravanaugh Rd Wilson NC 27893 legal size ease price list complete services YOUR R/C SPECIALIST normal flying usually means maximum pitch about 70 minimum pitch about ical maximum pitch 70 because using much pitch can overload engine cause overheat quit practice autorotation landings max imum pitch 100 will needed provide sufficient lift rotor speed decreases during flare So theres choice adjust pitch range nor mal flying lose autorotation capability set greater pitch autorota tions take chance overtaxing en gine too much pitch normal flight choices until sec ond pitch curve added provides capability flip switch have optimum pitch settings both normal flying autorotations As place start would recommend pitch range 2o 70 normal flying second pitch curve set ..40 100 autorota tions good approximation num bers may need changed slightly depending particular Helicopter flying style etc Exponential VTR exponential function best described referring Fig 1 Lets say graph right cyclic aileron horizontal axis repre sents movement control stick away neutral center position verti cal axis represents servo movement center position bottom scale maximum servo throw top As stick moved right notice initially very little servo move ment Point during second half stick movement servo catches up give full throw Point B gives us soft center improve stability smoothness yet makes full throw servo available needed trim ad justment also included adjust shape curve less softness flatter curve approaching straight line will make servo throw equal stick movement increasing curvature line will give softer center Futaba offers similar type softness around neutral call Variable Trace Ratio VTR shown Fig 2 Notice curve replaced two straight lines angle between lines determined trim pot overall ef fect very similar exponential func tion Hovering throttle collective trims Because average flier spends major ity time hovering some radios offer two separate trims fine tune collective throttle settings independent other other controls give optimum hover performance Although two separate trim functions its important re member direct relationship tween hovering throttle rpm really rotor rpm amount collective hoverContinued page 155 52 Model Aviation HIGH PERFORMANCE MODELS presents theWORLD CHAMPIONS AUGUST1987 Bob Whit Model #22 CHAMPION RUBBER BROUGHT HOME THE WAKEFIELD CUP CHAMPION RUBBER 3132 1183118 & 114 widths 042 thick $125011b box* Catalog-Si 00 CHAMPION MODEL PRODUCTS 880 Carmen Ct. La Verne CA 91750 714 599-3348 Cal Raa inciudaa US delivery via UP8Add Sales Tax HOBBY chairs aforementioned tool table bird will much better careful attention Thats month Keep black-andwhite photos acomin really appreciate model pictures use possi ble column Hell Radios/Tradelius Continued page 52 Lets suppose Helicopter hover collective/throttle stick mid range position engine rpm needs increased adjusting hovering throttle trim rotor rpm can increased affecting idle full-power set tings rotor rpm increased ever no change collective made Helicopter will begin climb keep climbing collective stick its mid-range position collec tive has re-trimmed case re duced pitch slightly compensate higher rotor speed can see two trim functions work together opposite other give finer control both hover rotor speed collective stick position Hover memory basic functions Helicopter radio covered column several months ago pro vide tail rotor compensation power collective changed hover settings does radio know Helicopter hover Without hov er memory feature radio must assume Heli hover throttle/col lective stick mid-point position hover memory feature however Helicopter brought hover memory feature turned allow radio memorize hover settings radio applies other mixing func tions such tail rotor compensation point especially good after using hover throttle collective trims mentioned above because may like hover throttle/collective stick out its mid-range position Warning lights Now several switches have added increased capabilities top-of-the-line radio its also easier have switches wrong position Thats warn ing lights very useful Several transmitters have red LED light-emitting diode displays illuminated power switch turned partic ular function monitoring turned will go steady light flash ing tradeoff always needed between size light amount battery operate warning lights rather small hard see direct day light Nonetheless add extra mar gin safety flying Clocks timers Closely related warning lights clocks timers keep track transmitter-on time flight time usually LCD liquid crystal displays require very little battery power give digital read-out time day transmitter-on time count up down timers flight time combination However display should protected exposure direct sunlight long periods prevent display fading seems newer radios especially PCM units require battery power older sets therefore may operate long single charge clocks stopwatches therefore use ful function keep us safe side battery limits though seems like have covered lot Helicopter functions between ar ticle previous still things individual manufac turers have supplied radios havent mentioned terested radios suggest find someone has can see goodies firsthandor write manufacturer importer owners manual list features etc Also top-of-the-line radios can expect higherquality components throughout radio including case switches control sticks appearance trim pots etc take closer look what additional cost brings flying enjoyment capabilities may well decide have its Bowman Horsham PA thinks part problem subsonic buffoons positions leadership bow scrape RC det riment meaningful Junior program Ed Lowe Holdingford MN opines avia tion has lost mystique excitement kids kids big dream get ride airplane Carl Fries NFFS founder thinks part decline FF due fact people dont know about what hobby shops going higher-profit RC items pay rent feels should shoot 24-35 age group can get Out distant flying fields FF now taking place Bill Miller Fairfield CT would like see simple Scale models market available kids sort order old 1OC-to-25C Megow models cites Jack Fikes Scale Flight kits Canadian Easybuilt line helping counts Bill Morez San Marcos CA has helped dozens Junior types over years noted stuck hobby maybe just have accept thing forever kids today listen different music have different heroes should allowed find own special joy figures pleasure Out sunshine model enough him Plenty food thought Until somebody does come up philoso phy well agree lets keep dis cussion going shall personally owe Free Flight Scale modeling far can ever repay lifetime am personally willing see go quiet grave Hannans Runway PO Box Escondido CA 92025 has couple things stock think might interest now list plastic ra dial engine kits suitable Peanut Scale models nine-cylinder P&W Wasp 14-cylinder Wasp nine-cylinder Wright $249 also cany hard-tofind five-cylinder packs plastic cylinders do-it-yourselfers % ne-inch scales also carry WW Golden Age wheels 34 1 1-in diameters can get -lb box A6 /32 /8-in FAI rubber autogiro tie tack rubber stamp Waco cabin ship Vic Smeads great Fifty Years March 1988 155 worth investment have best radio available FF Scale/Warner Continued page 55
Edition: Model Aviation - 1988/03
Page Numbers: 50, 51, 52, 155
A FEW MONTHS AGO did fill-in column Larry Jolly took look some standard features basic Helicopter radio described fea tures needed use Now well take look some may look complex switches knobs higherend Helicopter ra dios lot make flying easier smoother U Paul Tradelius Futaba PCM-8 Airtronics Module Helicopter Radio represent two certainly state-of-the-art radios loaded lots bells whistles improve flying Advanced Hell Radios Left A hover throttle trim four warning lights below meter just some extras offered Futaba Right Airtronics clocklstopwatch two warning lights left meter help make Helicopter flying safer taking out some guesswork 50 Model Aviation advanced features capabilities top-of-the-line Helicopter radios im prove models performance flying enjoyment Certainly better radios will have features men tioned will have themand article will give idea features important decided give Helicopters try several years ago wanted get started least initial expense used air plane radio already see passing fad wasnt long before knew wanted continue fly ing Helicopters airplane radio lot drawbacks purchased basic Heli copter radio flying really improved added features new radio soon felt fly ing progressed point ready advanced aerobatics would need top-of-the-line Heli radio Unfortunately advertisements various Heli radios did explain special features have quite surprised read through instruc tion manual saw what miss ing features very happy haveand sure could have used before known about bet ter radios probably would have purchased lot sooner Im suggesting need run out buy expensive radio enjoy fly ing Helicopters think should take closer look advanced features top-of-the-line units may make flying safer whole lot enjoyable Second idle up earlier article de scribed basic idle up function use top radios also have second idle up give flexibil ity controlling throttle various ma neuvers example use first idle up normal inverted flying landing pattern keep up rotor speed during descents second idle up set almost full power very fast forward flight aerobatics must have very high rotor rpm throughout entire collec tive range Having second idle up lets fine tune rotor rpm either normal flying aerobatics making sacrifi ces between two Multiple pitch curves also described basic pitch curve adjustments before having second pitch curve provides capability fine tune collective range different maneuvers Lets suppose first pitch curve adjusted give optimum performance Helicopter engine Left Both Idle up switches Futaba PCM located within easy reach trim knob side adjusting collective hover Right Two pitch curves available switch Airtronics Module radio Collective trim side adjusts easily flying March 1988 51 Both Futaba PCM left Airtronics Module right Helicopter Systems offer mul titude adjustments fine tune Helicopter maximum performance easier flying Airtronlcs hover memory hovering throttle trim helpful simple use Designed Henry Piorun Former Canadian National Champion & FAI Canadian Team Member Designed SpeQiflcally FAI Pattern Flying Perform Equally Well Other AMA Classes 54 wing span 7I 5 lb weight NOaq Ii 919 291-8548 Fiberglass Fuselage molded wIng Joiner tube Plug-la WIngs Fiberglass Belly Pan OptIonal PlastIc Fiberglass Canopy Pre-Cut Holes Wlng Joiner Tubes UltralIght Honeycomb Wlngcors extra $35 Send check money order HIGH PERFORMANCE MODELS 9558 116ASt North Delta British Columbia V4C 6Z4 Canada Basic Kit $12500 Pre-Built Kit $32500 604-588-0605 RADIO Radio trouble? Hobby Radio offers professional R/C repaire modifications make R/C equipment produced last 25 years Complete system service battery pack servoa vibration testing new journal including diagrams charts detailed frequency change etc Also R/Cer likes doit yourself Hobby Radio Volume 142 page modifications written simple understandable text Send $1995 Hobby Radio 3001-A Ravanaugh Rd Wilson NC 27893 legal size ease price list complete services YOUR R/C SPECIALIST normal flying usually means maximum pitch about 70 minimum pitch about ical maximum pitch 70 because using much pitch can overload engine cause overheat quit practice autorotation landings max imum pitch 100 will needed provide sufficient lift rotor speed decreases during flare So theres choice adjust pitch range nor mal flying lose autorotation capability set greater pitch autorota tions take chance overtaxing en gine too much pitch normal flight choices until sec ond pitch curve added provides capability flip switch have optimum pitch settings both normal flying autorotations As place start would recommend pitch range 2o 70 normal flying second pitch curve set ..40 100 autorota tions good approximation num bers may need changed slightly depending particular Helicopter flying style etc Exponential VTR exponential function best described referring Fig 1 Lets say graph right cyclic aileron horizontal axis repre sents movement control stick away neutral center position verti cal axis represents servo movement center position bottom scale maximum servo throw top As stick moved right notice initially very little servo move ment Point during second half stick movement servo catches up give full throw Point B gives us soft center improve stability smoothness yet makes full throw servo available needed trim ad justment also included adjust shape curve less softness flatter curve approaching straight line will make servo throw equal stick movement increasing curvature line will give softer center Futaba offers similar type softness around neutral call Variable Trace Ratio VTR shown Fig 2 Notice curve replaced two straight lines angle between lines determined trim pot overall ef fect very similar exponential func tion Hovering throttle collective trims Because average flier spends major ity time hovering some radios offer two separate trims fine tune collective throttle settings independent other other controls give optimum hover performance Although two separate trim functions its important re member direct relationship tween hovering throttle rpm really rotor rpm amount collective hoverContinued page 155 52 Model Aviation HIGH PERFORMANCE MODELS presents theWORLD CHAMPIONS AUGUST1987 Bob Whit Model #22 CHAMPION RUBBER BROUGHT HOME THE WAKEFIELD CUP CHAMPION RUBBER 3132 1183118 & 114 widths 042 thick $125011b box* Catalog-Si 00 CHAMPION MODEL PRODUCTS 880 Carmen Ct. La Verne CA 91750 714 599-3348 Cal Raa inciudaa US delivery via UP8Add Sales Tax HOBBY chairs aforementioned tool table bird will much better careful attention Thats month Keep black-andwhite photos acomin really appreciate model pictures use possi ble column Hell Radios/Tradelius Continued page 52 Lets suppose Helicopter hover collective/throttle stick mid range position engine rpm needs increased adjusting hovering throttle trim rotor rpm can increased affecting idle full-power set tings rotor rpm increased ever no change collective made Helicopter will begin climb keep climbing collective stick its mid-range position collec tive has re-trimmed case re duced pitch slightly compensate higher rotor speed can see two trim functions work together opposite other give finer control both hover rotor speed collective stick position Hover memory basic functions Helicopter radio covered column several months ago pro vide tail rotor compensation power collective changed hover settings does radio know Helicopter hover Without hov er memory feature radio must assume Heli hover throttle/col lective stick mid-point position hover memory feature however Helicopter brought hover memory feature turned allow radio memorize hover settings radio applies other mixing func tions such tail rotor compensation point especially good after using hover throttle collective trims mentioned above because may like hover throttle/collective stick out its mid-range position Warning lights Now several switches have added increased capabilities top-of-the-line radio its also easier have switches wrong position Thats warn ing lights very useful Several transmitters have red LED light-emitting diode displays illuminated power switch turned partic ular function monitoring turned will go steady light flash ing tradeoff always needed between size light amount battery operate warning lights rather small hard see direct day light Nonetheless add extra mar gin safety flying Clocks timers Closely related warning lights clocks timers keep track transmitter-on time flight time usually LCD liquid crystal displays require very little battery power give digital read-out time day transmitter-on time count up down timers flight time combination However display should protected exposure direct sunlight long periods prevent display fading seems newer radios especially PCM units require battery power older sets therefore may operate long single charge clocks stopwatches therefore use ful function keep us safe side battery limits though seems like have covered lot Helicopter functions between ar ticle previous still things individual manufac turers have supplied radios havent mentioned terested radios suggest find someone has can see goodies firsthandor write manufacturer importer owners manual list features etc Also top-of-the-line radios can expect higherquality components throughout radio including case switches control sticks appearance trim pots etc take closer look what additional cost brings flying enjoyment capabilities may well decide have its Bowman Horsham PA thinks part problem subsonic buffoons positions leadership bow scrape RC det riment meaningful Junior program Ed Lowe Holdingford MN opines avia tion has lost mystique excitement kids kids big dream get ride airplane Carl Fries NFFS founder thinks part decline FF due fact people dont know about what hobby shops going higher-profit RC items pay rent feels should shoot 24-35 age group can get Out distant flying fields FF now taking place Bill Miller Fairfield CT would like see simple Scale models market available kids sort order old 1OC-to-25C Megow models cites Jack Fikes Scale Flight kits Canadian Easybuilt line helping counts Bill Morez San Marcos CA has helped dozens Junior types over years noted stuck hobby maybe just have accept thing forever kids today listen different music have different heroes should allowed find own special joy figures pleasure Out sunshine model enough him Plenty food thought Until somebody does come up philoso phy well agree lets keep dis cussion going shall personally owe Free Flight Scale modeling far can ever repay lifetime am personally willing see go quiet grave Hannans Runway PO Box Escondido CA 92025 has couple things stock think might interest now list plastic ra dial engine kits suitable Peanut Scale models nine-cylinder P&W Wasp 14-cylinder Wasp nine-cylinder Wright $249 also cany hard-tofind five-cylinder packs plastic cylinders do-it-yourselfers % ne-inch scales also carry WW Golden Age wheels 34 1 1-in diameters can get -lb box A6 /32 /8-in FAI rubber autogiro tie tack rubber stamp Waco cabin ship Vic Smeads great Fifty Years March 1988 155 worth investment have best radio available FF Scale/Warner Continued page 55
Edition: Model Aviation - 1988/03
Page Numbers: 50, 51, 52, 155
A FEW MONTHS AGO did fill-in column Larry Jolly took look some standard features basic Helicopter radio described fea tures needed use Now well take look some may look complex switches knobs higherend Helicopter ra dios lot make flying easier smoother U Paul Tradelius Futaba PCM-8 Airtronics Module Helicopter Radio represent two certainly state-of-the-art radios loaded lots bells whistles improve flying Advanced Hell Radios Left A hover throttle trim four warning lights below meter just some extras offered Futaba Right Airtronics clocklstopwatch two warning lights left meter help make Helicopter flying safer taking out some guesswork 50 Model Aviation advanced features capabilities top-of-the-line Helicopter radios im prove models performance flying enjoyment Certainly better radios will have features men tioned will have themand article will give idea features important decided give Helicopters try several years ago wanted get started least initial expense used air plane radio already see passing fad wasnt long before knew wanted continue fly ing Helicopters airplane radio lot drawbacks purchased basic Heli copter radio flying really improved added features new radio soon felt fly ing progressed point ready advanced aerobatics would need top-of-the-line Heli radio Unfortunately advertisements various Heli radios did explain special features have quite surprised read through instruc tion manual saw what miss ing features very happy haveand sure could have used before known about bet ter radios probably would have purchased lot sooner Im suggesting need run out buy expensive radio enjoy fly ing Helicopters think should take closer look advanced features top-of-the-line units may make flying safer whole lot enjoyable Second idle up earlier article de scribed basic idle up function use top radios also have second idle up give flexibil ity controlling throttle various ma neuvers example use first idle up normal inverted flying landing pattern keep up rotor speed during descents second idle up set almost full power very fast forward flight aerobatics must have very high rotor rpm throughout entire collec tive range Having second idle up lets fine tune rotor rpm either normal flying aerobatics making sacrifi ces between two Multiple pitch curves also described basic pitch curve adjustments before having second pitch curve provides capability fine tune collective range different maneuvers Lets suppose first pitch curve adjusted give optimum performance Helicopter engine Left Both Idle up switches Futaba PCM located within easy reach trim knob side adjusting collective hover Right Two pitch curves available switch Airtronics Module radio Collective trim side adjusts easily flying March 1988 51 Both Futaba PCM left Airtronics Module right Helicopter Systems offer mul titude adjustments fine tune Helicopter maximum performance easier flying Airtronlcs hover memory hovering throttle trim helpful simple use Designed Henry Piorun Former Canadian National Champion & FAI Canadian Team Member Designed SpeQiflcally FAI Pattern Flying Perform Equally Well Other AMA Classes 54 wing span 7I 5 lb weight NOaq Ii 919 291-8548 Fiberglass Fuselage molded wIng Joiner tube Plug-la WIngs Fiberglass Belly Pan OptIonal PlastIc Fiberglass Canopy Pre-Cut Holes Wlng Joiner Tubes UltralIght Honeycomb Wlngcors extra $35 Send check money order HIGH PERFORMANCE MODELS 9558 116ASt North Delta British Columbia V4C 6Z4 Canada Basic Kit $12500 Pre-Built Kit $32500 604-588-0605 RADIO Radio trouble? Hobby Radio offers professional R/C repaire modifications make R/C equipment produced last 25 years Complete system service battery pack servoa vibration testing new journal including diagrams charts detailed frequency change etc Also R/Cer likes doit yourself Hobby Radio Volume 142 page modifications written simple understandable text Send $1995 Hobby Radio 3001-A Ravanaugh Rd Wilson NC 27893 legal size ease price list complete services YOUR R/C SPECIALIST normal flying usually means maximum pitch about 70 minimum pitch about ical maximum pitch 70 because using much pitch can overload engine cause overheat quit practice autorotation landings max imum pitch 100 will needed provide sufficient lift rotor speed decreases during flare So theres choice adjust pitch range nor mal flying lose autorotation capability set greater pitch autorota tions take chance overtaxing en gine too much pitch normal flight choices until sec ond pitch curve added provides capability flip switch have optimum pitch settings both normal flying autorotations As place start would recommend pitch range 2o 70 normal flying second pitch curve set ..40 100 autorota tions good approximation num bers may need changed slightly depending particular Helicopter flying style etc Exponential VTR exponential function best described referring Fig 1 Lets say graph right cyclic aileron horizontal axis repre sents movement control stick away neutral center position verti cal axis represents servo movement center position bottom scale maximum servo throw top As stick moved right notice initially very little servo move ment Point during second half stick movement servo catches up give full throw Point B gives us soft center improve stability smoothness yet makes full throw servo available needed trim ad justment also included adjust shape curve less softness flatter curve approaching straight line will make servo throw equal stick movement increasing curvature line will give softer center Futaba offers similar type softness around neutral call Variable Trace Ratio VTR shown Fig 2 Notice curve replaced two straight lines angle between lines determined trim pot overall ef fect very similar exponential func tion Hovering throttle collective trims Because average flier spends major ity time hovering some radios offer two separate trims fine tune collective throttle settings independent other other controls give optimum hover performance Although two separate trim functions its important re member direct relationship tween hovering throttle rpm really rotor rpm amount collective hoverContinued page 155 52 Model Aviation HIGH PERFORMANCE MODELS presents theWORLD CHAMPIONS AUGUST1987 Bob Whit Model #22 CHAMPION RUBBER BROUGHT HOME THE WAKEFIELD CUP CHAMPION RUBBER 3132 1183118 & 114 widths 042 thick $125011b box* Catalog-Si 00 CHAMPION MODEL PRODUCTS 880 Carmen Ct. La Verne CA 91750 714 599-3348 Cal Raa inciudaa US delivery via UP8Add Sales Tax HOBBY chairs aforementioned tool table bird will much better careful attention Thats month Keep black-andwhite photos acomin really appreciate model pictures use possi ble column Hell Radios/Tradelius Continued page 52 Lets suppose Helicopter hover collective/throttle stick mid range position engine rpm needs increased adjusting hovering throttle trim rotor rpm can increased affecting idle full-power set tings rotor rpm increased ever no change collective made Helicopter will begin climb keep climbing collective stick its mid-range position collec tive has re-trimmed case re duced pitch slightly compensate higher rotor speed can see two trim functions work together opposite other give finer control both hover rotor speed collective stick position Hover memory basic functions Helicopter radio covered column several months ago pro vide tail rotor compensation power collective changed hover settings does radio know Helicopter hover Without hov er memory feature radio must assume Heli hover throttle/col lective stick mid-point position hover memory feature however Helicopter brought hover memory feature turned allow radio memorize hover settings radio applies other mixing func tions such tail rotor compensation point especially good after using hover throttle collective trims mentioned above because may like hover throttle/collective stick out its mid-range position Warning lights Now several switches have added increased capabilities top-of-the-line radio its also easier have switches wrong position Thats warn ing lights very useful Several transmitters have red LED light-emitting diode displays illuminated power switch turned partic ular function monitoring turned will go steady light flash ing tradeoff always needed between size light amount battery operate warning lights rather small hard see direct day light Nonetheless add extra mar gin safety flying Clocks timers Closely related warning lights clocks timers keep track transmitter-on time flight time usually LCD liquid crystal displays require very little battery power give digital read-out time day transmitter-on time count up down timers flight time combination However display should protected exposure direct sunlight long periods prevent display fading seems newer radios especially PCM units require battery power older sets therefore may operate long single charge clocks stopwatches therefore use ful function keep us safe side battery limits though seems like have covered lot Helicopter functions between ar ticle previous still things individual manufac turers have supplied radios havent mentioned terested radios suggest find someone has can see goodies firsthandor write manufacturer importer owners manual list features etc Also top-of-the-line radios can expect higherquality components throughout radio including case switches control sticks appearance trim pots etc take closer look what additional cost brings flying enjoyment capabilities may well decide have its Bowman Horsham PA thinks part problem subsonic buffoons positions leadership bow scrape RC det riment meaningful Junior program Ed Lowe Holdingford MN opines avia tion has lost mystique excitement kids kids big dream get ride airplane Carl Fries NFFS founder thinks part decline FF due fact people dont know about what hobby shops going higher-profit RC items pay rent feels should shoot 24-35 age group can get Out distant flying fields FF now taking place Bill Miller Fairfield CT would like see simple Scale models market available kids sort order old 1OC-to-25C Megow models cites Jack Fikes Scale Flight kits Canadian Easybuilt line helping counts Bill Morez San Marcos CA has helped dozens Junior types over years noted stuck hobby maybe just have accept thing forever kids today listen different music have different heroes should allowed find own special joy figures pleasure Out sunshine model enough him Plenty food thought Until somebody does come up philoso phy well agree lets keep dis cussion going shall personally owe Free Flight Scale modeling far can ever repay lifetime am personally willing see go quiet grave Hannans Runway PO Box Escondido CA 92025 has couple things stock think might interest now list plastic ra dial engine kits suitable Peanut Scale models nine-cylinder P&W Wasp 14-cylinder Wasp nine-cylinder Wright $249 also cany hard-tofind five-cylinder packs plastic cylinders do-it-yourselfers % ne-inch scales also carry WW Golden Age wheels 34 1 1-in diameters can get -lb box A6 /32 /8-in FAI rubber autogiro tie tack rubber stamp Waco cabin ship Vic Smeads great Fifty Years March 1988 155 worth investment have best radio available FF Scale/Warner Continued page 55
