S Radio Control Helicopters Larry Jolly Larry Jolly taking breather month have asked another modeler Paul Tra delius guest author month Hes going talk about BASIC S Helicopter radio wasnt years ago radios two control sticks few trim levers caine new era radio features like servo reverse dual rates new radios said have bells whistles features werent really necessary nice haveand wasnt long before caine accept extras standard equipment now new generation radios bells whistles has become standard equipment us Heli copter fliers first saw Helicopter radio won dered switches knobs really needed after seeing much easier enjoyable Helicopter flying special features wouldnt think flying out radio manufacturer has different layout switches knobs other features minimum have basic mixing functions need Helicopters Lets take closer look some features can expect get Helicopter radio Tail Rotor Compensation mixer automatically makes input tall rotor rudder servo compensate rotor torque changes caused climbing descending flight As example lets suppose Helicopter hovering power collective controls increased start climb will produce torque change yaw axis Helicopter will cause nose swing left machine has clockwise-turning main rotor no other tall rotor control inputs made Tail Rotor Compensation mixer senses power collective have increased will automatically give tail rotor input counter increased torque thereby keeping nose straight reducing power descent similar change occurs now opposite direction compensation system again gives tall rotor input counter right yaw produced reduction main rotor torque Two trim knobs climb other descent used adjust amount tail rotor compensation particular machine flying conditions etc Pitch Curve Adjustment fancy way saying radio has capability adjust limit maximum minimum angie incidence collective pitch main rotor blades Both high low collective points can adjusted some radios have set Pitch Curve Adjustment limits order handie several phases flight Lets say want set pitch curve normal flying theres too much collective present drag blades will engine can handie will cause engine either overheat quit running prevent can adjust high-pitchtriinmer limit collective something engine can safely handle average Helicopter about 70 similar manner low side collective can adjusted comfortable rate descent collective control setting brought minimum initial setting would about 2o Now suppose want set pitch curve practice autorotations requires pitch range about 4O negative pitch needed maintain rotor rpm during descent large positive pitch helps us make soft landings rotor speed decreases example would nice have individual pitch curves both normal flying autorotations Without such capability compromise between two sets pitch limits would have made permanently trimmed machine Idle Up feature keeps throttle above idle though throttle stick moved full idie position means throttle collective sticks reduced point reached throttle will no longer decrease however collective affected can decreased limits lowpitch curve setting nice feature use both normal landings aerobatics keep rotor rpm high though collective brought minimum setting demonstrate usefulness Idle Up lets say using Idle Up feature youre coming landing throttle collective reduced descend engine will decrease rpm near idle will cause main tail rotor rpm decrease also low rotor speed will make Helicopter sluggish control power collective added during transition hover large increase rotor rpmand fore torquewill occur causing nose swing violently However Idle Up usedand set keep engine well above idleit would keep rotor speed up during descent better control easier transition hover Some radios have Idle Up func tion allowing function used landings other aerobatics higher rotor rpm required throughout entire col lective range Throttle Hold does exactly what says holds throttle predetermined setting no matter control stick moved Usually left stick two-stick transmitter controls both throttle collective Throttle Hold function activated stick controls collective engine speed Throttle Hold mode controlled another trimmer usually adjusted reliable idlebut high enough engage centrifugal clutch acts engage disengage engine rotor drive system feature needed Continued page 154 August 1987 55 FM/PCM transmitters have higher battery drain aider AM sets Helicopter radio inetallationstypically havefive servos plus gyroall add uptogreaterdrain flight battery pack SR Batteries offers transmitter airborne packs extended capacities radio system Using could plus safety Airtronics 7H Hell-radio transmitter withFutaba 8-channel FM/PCM Heli-radlo also easy-to-reach switchesand adJustmentcon-has extra switches knobs trols Yes bells whistles use-typical todays high-tech Helicopter sets fulpractical necessitiesA high-amp external SR Battery pack has added below transmitter somewhere Twill some time however before therell full-blown Scale Big-Bird Internats really shake out new FAI rules Italy 88 therell probably Giant event Canada 1990 biggest best news Paris removal engine displacement restrictions increase allowable model weight 15-lbplus should go long way toward making international Scale class models FAI Scale/AMA Precision Scale bunch attractive potential competitors wouldnt take too much effort create true scale Big Bird under revised rules just received report swell new idea Leo Ford editor Hangar Flyer newsletter Colorado Dawn Patrol IMAA Chapter 90 sent 31 photographs Chuck Nelson Tommy Meyer processed Tom Ryan pictures taken Chapter 90s Winter Project Reviewsomething entirely new different exciting Sunday March 15 everybody Chapter brought his/her winters project display Waynes Automotive beautiful downtown Denver talking about thing set drawings models ready crank take off Twas ultimate show-and-tell super-neat way reinspire troops midst winter building season also opportunity present building seminars inspired idea other clubs/chapters would well copy next year weather agin us Ryan wIll soon have wheels sincere thanks Bob Lonseth Sylvania OH Harry Apoian Rolling Hills CA Bob pointed out Caterpillar tractors have large 0-rings part Duo-Cone seals might suitable tires homemade wheels Harry noted 6-in wheels scale configuration commercially available Germany Thanks Bob Harry rest wrote potential solutions Ryan wheel problem Keep fingers out prop fire extinguisher close hand batteries charged Giant Scale bird safe flying condi tionand well back next month new idea three John de Vries 4610 MoffatLn Colorado Springs CO 80915 RC Pylon Racing/Hager Continued page 54 3 Submerge fronthousing swish crank shaft listening/feeling rough spots may indicate presence metal particles Re peat process until crankshaft spins freely 4 Apply Marvel Oil liberally bed rings crankshaft 5 same thing other parts 6 Reassemble enginehead-bolt torque should 7 point onward engine must kept clean wrap cotton 8 Break-in procedure Mount engine Q500 aircraft preferably using metal engine mount Affix 9 x 6 Master Airscrew prop en carburetor idle screw two turns present position Open main needle valve five turns ground no muffler possible Run engine very rich minute let cool repeat process three times engine running cool can hold cylinder head its running Break-in procedure air Install muffler sure engine set very rich still flyable Low throttle should kill en gine due overly rich idie setting Fly enginethree four flights shallow climbs dives mostly flat gentle turns After four five flights begin doing large reverse Cuban Eights climb 200 roll inverted large de loop 200 climb opposite direction etc Continue process gradually leaning out engine adding stress flight maneuvers After 12 15 flights four five minutes per flight engine should race-ready Keys success 1 Cleanliness 2 Patience 3 little luck Hey gang really works alistofQ500 kits sources Thunder Q-11 Pauls Flying Stuff PO Box 121 Escondido CA 92025 phone 619 743-5458 China Clipper Model Tech available hobby stores T Tailed California Speed Pros 32221 Alipaz No 15 San Juan Capistrano CA 92675 phone 714 661-7430 Spickler Spickler Models available hobby stores Texas Outlaw Dickie Ritch 4101 Lar Houston TX 77025 phone 713 661-5458 Scat Cat Flite Line Models available hobby stores Yellow Jacket Mills Airplane Models 2868 Hambleton Rica MD 21140 phone 301 956-3308 See races Bill Hager 706 Glen Haven Dr Conroe TX 77385 RC Helicopters/Jolly Continued page 55 practice autorotation both nice ma neuver perform also handy proficient should engine quit during flight some radios Throttle Hold switch activated collective controlled second set pitch curves described earlier resulting allowing greater range collective required descent landing disturbing feature newer Helicopter transmitters particular operating pulse-code modulation PCM seem operate significantly shorter period time singie charge past experience has prepared us accept Airborne battery requirements have also increased power directional-control gyro well fifth servo used control collective pitch main rotor can put quite strain batteries excellent cure provided SR Batteries manufactures high-capacity lightweight batteries replacements transmitter airborne battery packs packs will provide added flying time charge will make custom packs feel something extra-special needed no matter what batteries use its always good idea cycle periodically check capacities During typical day flying after having made several flights Ill also use expanded-scale voltmeter ESV test batteries under load make sure its still safe fly Helicopter radios may seem little complicated first little practice functions well others particular radio will become very easy logical use now features have become standard us chopper pilots wonder what manufacturers dreaming up next generation radios Products following manufacturers described article Airtronics Inc 11 Continued page 156 154 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 5060 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $20000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 responding advertisers mention read about ModelAviation IV~SGRATESHAPESTM SANDING BLOCKS Long lasting silicon Carbide grit sides 10 Long GS 101GS 102GS 103 114 & 31W112 & 5/8314 & 1 Combo package #1-GS 101 102 103 $1195 S&HSAVEI Six Pack Combo GSs above- $2195 S&H Single GS $495 S&H AZ RESIDENTS ADD 5% TAX products guaranteed ers invited Ask yotlr hobby dealer first MASTER CHARGE OR VISA ACCEPTED Hwy 179-Suite 108 1602 264-1806 GRATE-SHAPESTM ROUNDS GS 200 PKG mir 91/2 long$795 S&H SEND CHECK OR MO NEY OR DER TO 911 Rock Industries Sedona AZ 66336 05 104G5 105GS 106 3/8 & 5/8 900 Vs wIsIa 450 & 900 Combo package #2-GS 104 105 106 $1195 S&H GRATE-SMAPESm SQUARES OS 300 PKG 9/ longS495 5&H Autry Irvine CA 92718 Futaba Corp America 555 West Victoria St Compton CA 90220 SR Batteries Box 287 Beliport NY 11713 Thanks guest columnist Paul Tradelius informative article regular contnbuting editor Larry buy should back us again nextmonth Keep sending him photos news ideas Larry Jolly 5501 W Coma Santa Ana CA 92703 Newsletters/Berman Continued page 59 Soon after letter out Michael T Nogy elder statesman member Belle Vernon PA approached stack pictures clippings yellowed age Heck said about item paper built doggone plane its inventor Bemis Johnston can tell about Mike unfolded fascinating tragic story wingless wonder ended up bone-yard principle should have flown Mike said practice mechanical problems did rnand wouldnt let us fix prob lems have since run sequel Mike hapless hangar queen During terview man spine has ribs spars instead vertebrae picked up aviation lore print future letters point air planes have gone inception fabrication thousands people out captivating stories just have put reporters hat again dig out other requirement newsletter editor favorite active club member aware other members activities both off field Before head gets too big keep mind because inside formation letter going little interest outside group except wives seem reading little gette. maybe see what up As routine mechanics getting out newsletter hardly require comment Four hours staple pounding address label taping stamp licking generally norm some short cuts Ive come across though ex ample put members names addresses blocks drawn 8 x 11in piece paper just photocopy cut up mailing labels labels can quickly taped already stapled newsletters course use sponge wet stamps theres no way could come up much spit Newsletters can broken down two basic categories Theres abbreviated report type letter just conveys news dates theres expanded newsletter continues editorials critiques plans scratch-built models basic report-type letter could con tain information meeting dates raffle prizes flea markets should also report happenings previous meeting names attendees stood out raffle winners show-and-tell exhib itors snack donors Finally should contain announcements national local events mall shows special pro grams modeling spectaculars like Striking Back expanded letter can anything youre capable cranking out really no limit specifically can contain such extra goodies true editorials soap boxes relating club activities can run articles things like safety build ing techniques consumer critiques unusual experiences Again best services can offer readers write up condensations major topics like frequency allocations new narrowband radios combating noise strat egies holding onto flying field list goes on Just remember keep little bird head forever lookout times newsletter editors may seem full perhaps baloney bs urge write vying blue ribbons Hall Fame nominations What want produce quality product readers can enjoy learn fromand just maybe doing club doesnt have newsletter seems strike home hope will think about doing yourself wont easy often youll find yourself working alone can guarantee work will much make club better club CL Scale/Boss Continued page 60 place wheel fully wrapped use CyA lock thread down harden balsa disk disk should now look like C sketch Before proceeding next step wheel-making lets go back bit point mark position spokes An easy way space spoke markings evenly around wheel first determine spokes Lets say will 24 spokes Dividing 24 3600 represents wheels outer rim find spoke mark should made 150 around rim use protractor should help marking spoke positions point can cut away thread crosses grooved inside balsa disk Now cut disk silk silkrayon blend about three four times size wheel using plenty dope apply fabric side wheel pulling fabric tight can Use rubberband other side hold extra fabric tightly place until dries dry cutaway extra cloth sharp knife apply fabric other side wheel using same procedure thread spokes show through look very realistic familiar idea covering spoked wheels would like point out photos of early planes appear have solid wheel hubs actuality have spoked wheels fabric covering over Therefore Bobs approach simulating spoked wheel produces very realistic-looking unit appears last thing have to either obtaln tire make First lets explore Bob Furrs approach making tire recommends visit local auto supply store will look around various sizes rubber tubes used vacuum hoses etc little effort can locate perfectly sized tire Before CyA glues next part very difficult however Bob says can now Cut rubber tubing just long enough reach way around hub wheel disk just completed Place tubing disk recess carefully glue hub CyA Continued page 159 156 Model Aviation
Edition: Model Aviation - 1987/08
Page Numbers: 55, 154, 156
S Radio Control Helicopters Larry Jolly Larry Jolly taking breather month have asked another modeler Paul Tra delius guest author month Hes going talk about BASIC S Helicopter radio wasnt years ago radios two control sticks few trim levers caine new era radio features like servo reverse dual rates new radios said have bells whistles features werent really necessary nice haveand wasnt long before caine accept extras standard equipment now new generation radios bells whistles has become standard equipment us Heli copter fliers first saw Helicopter radio won dered switches knobs really needed after seeing much easier enjoyable Helicopter flying special features wouldnt think flying out radio manufacturer has different layout switches knobs other features minimum have basic mixing functions need Helicopters Lets take closer look some features can expect get Helicopter radio Tail Rotor Compensation mixer automatically makes input tall rotor rudder servo compensate rotor torque changes caused climbing descending flight As example lets suppose Helicopter hovering power collective controls increased start climb will produce torque change yaw axis Helicopter will cause nose swing left machine has clockwise-turning main rotor no other tall rotor control inputs made Tail Rotor Compensation mixer senses power collective have increased will automatically give tail rotor input counter increased torque thereby keeping nose straight reducing power descent similar change occurs now opposite direction compensation system again gives tall rotor input counter right yaw produced reduction main rotor torque Two trim knobs climb other descent used adjust amount tail rotor compensation particular machine flying conditions etc Pitch Curve Adjustment fancy way saying radio has capability adjust limit maximum minimum angie incidence collective pitch main rotor blades Both high low collective points can adjusted some radios have set Pitch Curve Adjustment limits order handie several phases flight Lets say want set pitch curve normal flying theres too much collective present drag blades will engine can handie will cause engine either overheat quit running prevent can adjust high-pitchtriinmer limit collective something engine can safely handle average Helicopter about 70 similar manner low side collective can adjusted comfortable rate descent collective control setting brought minimum initial setting would about 2o Now suppose want set pitch curve practice autorotations requires pitch range about 4O negative pitch needed maintain rotor rpm during descent large positive pitch helps us make soft landings rotor speed decreases example would nice have individual pitch curves both normal flying autorotations Without such capability compromise between two sets pitch limits would have made permanently trimmed machine Idle Up feature keeps throttle above idle though throttle stick moved full idie position means throttle collective sticks reduced point reached throttle will no longer decrease however collective affected can decreased limits lowpitch curve setting nice feature use both normal landings aerobatics keep rotor rpm high though collective brought minimum setting demonstrate usefulness Idle Up lets say using Idle Up feature youre coming landing throttle collective reduced descend engine will decrease rpm near idle will cause main tail rotor rpm decrease also low rotor speed will make Helicopter sluggish control power collective added during transition hover large increase rotor rpmand fore torquewill occur causing nose swing violently However Idle Up usedand set keep engine well above idleit would keep rotor speed up during descent better control easier transition hover Some radios have Idle Up func tion allowing function used landings other aerobatics higher rotor rpm required throughout entire col lective range Throttle Hold does exactly what says holds throttle predetermined setting no matter control stick moved Usually left stick two-stick transmitter controls both throttle collective Throttle Hold function activated stick controls collective engine speed Throttle Hold mode controlled another trimmer usually adjusted reliable idlebut high enough engage centrifugal clutch acts engage disengage engine rotor drive system feature needed Continued page 154 August 1987 55 FM/PCM transmitters have higher battery drain aider AM sets Helicopter radio inetallationstypically havefive servos plus gyroall add uptogreaterdrain flight battery pack SR Batteries offers transmitter airborne packs extended capacities radio system Using could plus safety Airtronics 7H Hell-radio transmitter withFutaba 8-channel FM/PCM Heli-radlo also easy-to-reach switchesand adJustmentcon-has extra switches knobs trols Yes bells whistles use-typical todays high-tech Helicopter sets fulpractical necessitiesA high-amp external SR Battery pack has added below transmitter somewhere Twill some time however before therell full-blown Scale Big-Bird Internats really shake out new FAI rules Italy 88 therell probably Giant event Canada 1990 biggest best news Paris removal engine displacement restrictions increase allowable model weight 15-lbplus should go long way toward making international Scale class models FAI Scale/AMA Precision Scale bunch attractive potential competitors wouldnt take too much effort create true scale Big Bird under revised rules just received report swell new idea Leo Ford editor Hangar Flyer newsletter Colorado Dawn Patrol IMAA Chapter 90 sent 31 photographs Chuck Nelson Tommy Meyer processed Tom Ryan pictures taken Chapter 90s Winter Project Reviewsomething entirely new different exciting Sunday March 15 everybody Chapter brought his/her winters project display Waynes Automotive beautiful downtown Denver talking about thing set drawings models ready crank take off Twas ultimate show-and-tell super-neat way reinspire troops midst winter building season also opportunity present building seminars inspired idea other clubs/chapters would well copy next year weather agin us Ryan wIll soon have wheels sincere thanks Bob Lonseth Sylvania OH Harry Apoian Rolling Hills CA Bob pointed out Caterpillar tractors have large 0-rings part Duo-Cone seals might suitable tires homemade wheels Harry noted 6-in wheels scale configuration commercially available Germany Thanks Bob Harry rest wrote potential solutions Ryan wheel problem Keep fingers out prop fire extinguisher close hand batteries charged Giant Scale bird safe flying condi tionand well back next month new idea three John de Vries 4610 MoffatLn Colorado Springs CO 80915 RC Pylon Racing/Hager Continued page 54 3 Submerge fronthousing swish crank shaft listening/feeling rough spots may indicate presence metal particles Re peat process until crankshaft spins freely 4 Apply Marvel Oil liberally bed rings crankshaft 5 same thing other parts 6 Reassemble enginehead-bolt torque should 7 point onward engine must kept clean wrap cotton 8 Break-in procedure Mount engine Q500 aircraft preferably using metal engine mount Affix 9 x 6 Master Airscrew prop en carburetor idle screw two turns present position Open main needle valve five turns ground no muffler possible Run engine very rich minute let cool repeat process three times engine running cool can hold cylinder head its running Break-in procedure air Install muffler sure engine set very rich still flyable Low throttle should kill en gine due overly rich idie setting Fly enginethree four flights shallow climbs dives mostly flat gentle turns After four five flights begin doing large reverse Cuban Eights climb 200 roll inverted large de loop 200 climb opposite direction etc Continue process gradually leaning out engine adding stress flight maneuvers After 12 15 flights four five minutes per flight engine should race-ready Keys success 1 Cleanliness 2 Patience 3 little luck Hey gang really works alistofQ500 kits sources Thunder Q-11 Pauls Flying Stuff PO Box 121 Escondido CA 92025 phone 619 743-5458 China Clipper Model Tech available hobby stores T Tailed California Speed Pros 32221 Alipaz No 15 San Juan Capistrano CA 92675 phone 714 661-7430 Spickler Spickler Models available hobby stores Texas Outlaw Dickie Ritch 4101 Lar Houston TX 77025 phone 713 661-5458 Scat Cat Flite Line Models available hobby stores Yellow Jacket Mills Airplane Models 2868 Hambleton Rica MD 21140 phone 301 956-3308 See races Bill Hager 706 Glen Haven Dr Conroe TX 77385 RC Helicopters/Jolly Continued page 55 practice autorotation both nice ma neuver perform also handy proficient should engine quit during flight some radios Throttle Hold switch activated collective controlled second set pitch curves described earlier resulting allowing greater range collective required descent landing disturbing feature newer Helicopter transmitters particular operating pulse-code modulation PCM seem operate significantly shorter period time singie charge past experience has prepared us accept Airborne battery requirements have also increased power directional-control gyro well fifth servo used control collective pitch main rotor can put quite strain batteries excellent cure provided SR Batteries manufactures high-capacity lightweight batteries replacements transmitter airborne battery packs packs will provide added flying time charge will make custom packs feel something extra-special needed no matter what batteries use its always good idea cycle periodically check capacities During typical day flying after having made several flights Ill also use expanded-scale voltmeter ESV test batteries under load make sure its still safe fly Helicopter radios may seem little complicated first little practice functions well others particular radio will become very easy logical use now features have become standard us chopper pilots wonder what manufacturers dreaming up next generation radios Products following manufacturers described article Airtronics Inc 11 Continued page 156 154 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 5060 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $20000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 responding advertisers mention read about ModelAviation IV~SGRATESHAPESTM SANDING BLOCKS Long lasting silicon Carbide grit sides 10 Long GS 101GS 102GS 103 114 & 31W112 & 5/8314 & 1 Combo package #1-GS 101 102 103 $1195 S&HSAVEI Six Pack Combo GSs above- $2195 S&H Single GS $495 S&H AZ RESIDENTS ADD 5% TAX products guaranteed ers invited Ask yotlr hobby dealer first MASTER CHARGE OR VISA ACCEPTED Hwy 179-Suite 108 1602 264-1806 GRATE-SHAPESTM ROUNDS GS 200 PKG mir 91/2 long$795 S&H SEND CHECK OR MO NEY OR DER TO 911 Rock Industries Sedona AZ 66336 05 104G5 105GS 106 3/8 & 5/8 900 Vs wIsIa 450 & 900 Combo package #2-GS 104 105 106 $1195 S&H GRATE-SMAPESm SQUARES OS 300 PKG 9/ longS495 5&H Autry Irvine CA 92718 Futaba Corp America 555 West Victoria St Compton CA 90220 SR Batteries Box 287 Beliport NY 11713 Thanks guest columnist Paul Tradelius informative article regular contnbuting editor Larry buy should back us again nextmonth Keep sending him photos news ideas Larry Jolly 5501 W Coma Santa Ana CA 92703 Newsletters/Berman Continued page 59 Soon after letter out Michael T Nogy elder statesman member Belle Vernon PA approached stack pictures clippings yellowed age Heck said about item paper built doggone plane its inventor Bemis Johnston can tell about Mike unfolded fascinating tragic story wingless wonder ended up bone-yard principle should have flown Mike said practice mechanical problems did rnand wouldnt let us fix prob lems have since run sequel Mike hapless hangar queen During terview man spine has ribs spars instead vertebrae picked up aviation lore print future letters point air planes have gone inception fabrication thousands people out captivating stories just have put reporters hat again dig out other requirement newsletter editor favorite active club member aware other members activities both off field Before head gets too big keep mind because inside formation letter going little interest outside group except wives seem reading little gette. maybe see what up As routine mechanics getting out newsletter hardly require comment Four hours staple pounding address label taping stamp licking generally norm some short cuts Ive come across though ex ample put members names addresses blocks drawn 8 x 11in piece paper just photocopy cut up mailing labels labels can quickly taped already stapled newsletters course use sponge wet stamps theres no way could come up much spit Newsletters can broken down two basic categories Theres abbreviated report type letter just conveys news dates theres expanded newsletter continues editorials critiques plans scratch-built models basic report-type letter could con tain information meeting dates raffle prizes flea markets should also report happenings previous meeting names attendees stood out raffle winners show-and-tell exhib itors snack donors Finally should contain announcements national local events mall shows special pro grams modeling spectaculars like Striking Back expanded letter can anything youre capable cranking out really no limit specifically can contain such extra goodies true editorials soap boxes relating club activities can run articles things like safety build ing techniques consumer critiques unusual experiences Again best services can offer readers write up condensations major topics like frequency allocations new narrowband radios combating noise strat egies holding onto flying field list goes on Just remember keep little bird head forever lookout times newsletter editors may seem full perhaps baloney bs urge write vying blue ribbons Hall Fame nominations What want produce quality product readers can enjoy learn fromand just maybe doing club doesnt have newsletter seems strike home hope will think about doing yourself wont easy often youll find yourself working alone can guarantee work will much make club better club CL Scale/Boss Continued page 60 place wheel fully wrapped use CyA lock thread down harden balsa disk disk should now look like C sketch Before proceeding next step wheel-making lets go back bit point mark position spokes An easy way space spoke markings evenly around wheel first determine spokes Lets say will 24 spokes Dividing 24 3600 represents wheels outer rim find spoke mark should made 150 around rim use protractor should help marking spoke positions point can cut away thread crosses grooved inside balsa disk Now cut disk silk silkrayon blend about three four times size wheel using plenty dope apply fabric side wheel pulling fabric tight can Use rubberband other side hold extra fabric tightly place until dries dry cutaway extra cloth sharp knife apply fabric other side wheel using same procedure thread spokes show through look very realistic familiar idea covering spoked wheels would like point out photos of early planes appear have solid wheel hubs actuality have spoked wheels fabric covering over Therefore Bobs approach simulating spoked wheel produces very realistic-looking unit appears last thing have to either obtaln tire make First lets explore Bob Furrs approach making tire recommends visit local auto supply store will look around various sizes rubber tubes used vacuum hoses etc little effort can locate perfectly sized tire Before CyA glues next part very difficult however Bob says can now Cut rubber tubing just long enough reach way around hub wheel disk just completed Place tubing disk recess carefully glue hub CyA Continued page 159 156 Model Aviation
Edition: Model Aviation - 1987/08
Page Numbers: 55, 154, 156
S Radio Control Helicopters Larry Jolly Larry Jolly taking breather month have asked another modeler Paul Tra delius guest author month Hes going talk about BASIC S Helicopter radio wasnt years ago radios two control sticks few trim levers caine new era radio features like servo reverse dual rates new radios said have bells whistles features werent really necessary nice haveand wasnt long before caine accept extras standard equipment now new generation radios bells whistles has become standard equipment us Heli copter fliers first saw Helicopter radio won dered switches knobs really needed after seeing much easier enjoyable Helicopter flying special features wouldnt think flying out radio manufacturer has different layout switches knobs other features minimum have basic mixing functions need Helicopters Lets take closer look some features can expect get Helicopter radio Tail Rotor Compensation mixer automatically makes input tall rotor rudder servo compensate rotor torque changes caused climbing descending flight As example lets suppose Helicopter hovering power collective controls increased start climb will produce torque change yaw axis Helicopter will cause nose swing left machine has clockwise-turning main rotor no other tall rotor control inputs made Tail Rotor Compensation mixer senses power collective have increased will automatically give tail rotor input counter increased torque thereby keeping nose straight reducing power descent similar change occurs now opposite direction compensation system again gives tall rotor input counter right yaw produced reduction main rotor torque Two trim knobs climb other descent used adjust amount tail rotor compensation particular machine flying conditions etc Pitch Curve Adjustment fancy way saying radio has capability adjust limit maximum minimum angie incidence collective pitch main rotor blades Both high low collective points can adjusted some radios have set Pitch Curve Adjustment limits order handie several phases flight Lets say want set pitch curve normal flying theres too much collective present drag blades will engine can handie will cause engine either overheat quit running prevent can adjust high-pitchtriinmer limit collective something engine can safely handle average Helicopter about 70 similar manner low side collective can adjusted comfortable rate descent collective control setting brought minimum initial setting would about 2o Now suppose want set pitch curve practice autorotations requires pitch range about 4O negative pitch needed maintain rotor rpm during descent large positive pitch helps us make soft landings rotor speed decreases example would nice have individual pitch curves both normal flying autorotations Without such capability compromise between two sets pitch limits would have made permanently trimmed machine Idle Up feature keeps throttle above idle though throttle stick moved full idie position means throttle collective sticks reduced point reached throttle will no longer decrease however collective affected can decreased limits lowpitch curve setting nice feature use both normal landings aerobatics keep rotor rpm high though collective brought minimum setting demonstrate usefulness Idle Up lets say using Idle Up feature youre coming landing throttle collective reduced descend engine will decrease rpm near idle will cause main tail rotor rpm decrease also low rotor speed will make Helicopter sluggish control power collective added during transition hover large increase rotor rpmand fore torquewill occur causing nose swing violently However Idle Up usedand set keep engine well above idleit would keep rotor speed up during descent better control easier transition hover Some radios have Idle Up func tion allowing function used landings other aerobatics higher rotor rpm required throughout entire col lective range Throttle Hold does exactly what says holds throttle predetermined setting no matter control stick moved Usually left stick two-stick transmitter controls both throttle collective Throttle Hold function activated stick controls collective engine speed Throttle Hold mode controlled another trimmer usually adjusted reliable idlebut high enough engage centrifugal clutch acts engage disengage engine rotor drive system feature needed Continued page 154 August 1987 55 FM/PCM transmitters have higher battery drain aider AM sets Helicopter radio inetallationstypically havefive servos plus gyroall add uptogreaterdrain flight battery pack SR Batteries offers transmitter airborne packs extended capacities radio system Using could plus safety Airtronics 7H Hell-radio transmitter withFutaba 8-channel FM/PCM Heli-radlo also easy-to-reach switchesand adJustmentcon-has extra switches knobs trols Yes bells whistles use-typical todays high-tech Helicopter sets fulpractical necessitiesA high-amp external SR Battery pack has added below transmitter somewhere Twill some time however before therell full-blown Scale Big-Bird Internats really shake out new FAI rules Italy 88 therell probably Giant event Canada 1990 biggest best news Paris removal engine displacement restrictions increase allowable model weight 15-lbplus should go long way toward making international Scale class models FAI Scale/AMA Precision Scale bunch attractive potential competitors wouldnt take too much effort create true scale Big Bird under revised rules just received report swell new idea Leo Ford editor Hangar Flyer newsletter Colorado Dawn Patrol IMAA Chapter 90 sent 31 photographs Chuck Nelson Tommy Meyer processed Tom Ryan pictures taken Chapter 90s Winter Project Reviewsomething entirely new different exciting Sunday March 15 everybody Chapter brought his/her winters project display Waynes Automotive beautiful downtown Denver talking about thing set drawings models ready crank take off Twas ultimate show-and-tell super-neat way reinspire troops midst winter building season also opportunity present building seminars inspired idea other clubs/chapters would well copy next year weather agin us Ryan wIll soon have wheels sincere thanks Bob Lonseth Sylvania OH Harry Apoian Rolling Hills CA Bob pointed out Caterpillar tractors have large 0-rings part Duo-Cone seals might suitable tires homemade wheels Harry noted 6-in wheels scale configuration commercially available Germany Thanks Bob Harry rest wrote potential solutions Ryan wheel problem Keep fingers out prop fire extinguisher close hand batteries charged Giant Scale bird safe flying condi tionand well back next month new idea three John de Vries 4610 MoffatLn Colorado Springs CO 80915 RC Pylon Racing/Hager Continued page 54 3 Submerge fronthousing swish crank shaft listening/feeling rough spots may indicate presence metal particles Re peat process until crankshaft spins freely 4 Apply Marvel Oil liberally bed rings crankshaft 5 same thing other parts 6 Reassemble enginehead-bolt torque should 7 point onward engine must kept clean wrap cotton 8 Break-in procedure Mount engine Q500 aircraft preferably using metal engine mount Affix 9 x 6 Master Airscrew prop en carburetor idle screw two turns present position Open main needle valve five turns ground no muffler possible Run engine very rich minute let cool repeat process three times engine running cool can hold cylinder head its running Break-in procedure air Install muffler sure engine set very rich still flyable Low throttle should kill en gine due overly rich idie setting Fly enginethree four flights shallow climbs dives mostly flat gentle turns After four five flights begin doing large reverse Cuban Eights climb 200 roll inverted large de loop 200 climb opposite direction etc Continue process gradually leaning out engine adding stress flight maneuvers After 12 15 flights four five minutes per flight engine should race-ready Keys success 1 Cleanliness 2 Patience 3 little luck Hey gang really works alistofQ500 kits sources Thunder Q-11 Pauls Flying Stuff PO Box 121 Escondido CA 92025 phone 619 743-5458 China Clipper Model Tech available hobby stores T Tailed California Speed Pros 32221 Alipaz No 15 San Juan Capistrano CA 92675 phone 714 661-7430 Spickler Spickler Models available hobby stores Texas Outlaw Dickie Ritch 4101 Lar Houston TX 77025 phone 713 661-5458 Scat Cat Flite Line Models available hobby stores Yellow Jacket Mills Airplane Models 2868 Hambleton Rica MD 21140 phone 301 956-3308 See races Bill Hager 706 Glen Haven Dr Conroe TX 77385 RC Helicopters/Jolly Continued page 55 practice autorotation both nice ma neuver perform also handy proficient should engine quit during flight some radios Throttle Hold switch activated collective controlled second set pitch curves described earlier resulting allowing greater range collective required descent landing disturbing feature newer Helicopter transmitters particular operating pulse-code modulation PCM seem operate significantly shorter period time singie charge past experience has prepared us accept Airborne battery requirements have also increased power directional-control gyro well fifth servo used control collective pitch main rotor can put quite strain batteries excellent cure provided SR Batteries manufactures high-capacity lightweight batteries replacements transmitter airborne battery packs packs will provide added flying time charge will make custom packs feel something extra-special needed no matter what batteries use its always good idea cycle periodically check capacities During typical day flying after having made several flights Ill also use expanded-scale voltmeter ESV test batteries under load make sure its still safe fly Helicopter radios may seem little complicated first little practice functions well others particular radio will become very easy logical use now features have become standard us chopper pilots wonder what manufacturers dreaming up next generation radios Products following manufacturers described article Airtronics Inc 11 Continued page 156 154 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 5060 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $20000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 responding advertisers mention read about ModelAviation IV~SGRATESHAPESTM SANDING BLOCKS Long lasting silicon Carbide grit sides 10 Long GS 101GS 102GS 103 114 & 31W112 & 5/8314 & 1 Combo package #1-GS 101 102 103 $1195 S&HSAVEI Six Pack Combo GSs above- $2195 S&H Single GS $495 S&H AZ RESIDENTS ADD 5% TAX products guaranteed ers invited Ask yotlr hobby dealer first MASTER CHARGE OR VISA ACCEPTED Hwy 179-Suite 108 1602 264-1806 GRATE-SHAPESTM ROUNDS GS 200 PKG mir 91/2 long$795 S&H SEND CHECK OR MO NEY OR DER TO 911 Rock Industries Sedona AZ 66336 05 104G5 105GS 106 3/8 & 5/8 900 Vs wIsIa 450 & 900 Combo package #2-GS 104 105 106 $1195 S&H GRATE-SMAPESm SQUARES OS 300 PKG 9/ longS495 5&H Autry Irvine CA 92718 Futaba Corp America 555 West Victoria St Compton CA 90220 SR Batteries Box 287 Beliport NY 11713 Thanks guest columnist Paul Tradelius informative article regular contnbuting editor Larry buy should back us again nextmonth Keep sending him photos news ideas Larry Jolly 5501 W Coma Santa Ana CA 92703 Newsletters/Berman Continued page 59 Soon after letter out Michael T Nogy elder statesman member Belle Vernon PA approached stack pictures clippings yellowed age Heck said about item paper built doggone plane its inventor Bemis Johnston can tell about Mike unfolded fascinating tragic story wingless wonder ended up bone-yard principle should have flown Mike said practice mechanical problems did rnand wouldnt let us fix prob lems have since run sequel Mike hapless hangar queen During terview man spine has ribs spars instead vertebrae picked up aviation lore print future letters point air planes have gone inception fabrication thousands people out captivating stories just have put reporters hat again dig out other requirement newsletter editor favorite active club member aware other members activities both off field Before head gets too big keep mind because inside formation letter going little interest outside group except wives seem reading little gette. maybe see what up As routine mechanics getting out newsletter hardly require comment Four hours staple pounding address label taping stamp licking generally norm some short cuts Ive come across though ex ample put members names addresses blocks drawn 8 x 11in piece paper just photocopy cut up mailing labels labels can quickly taped already stapled newsletters course use sponge wet stamps theres no way could come up much spit Newsletters can broken down two basic categories Theres abbreviated report type letter just conveys news dates theres expanded newsletter continues editorials critiques plans scratch-built models basic report-type letter could con tain information meeting dates raffle prizes flea markets should also report happenings previous meeting names attendees stood out raffle winners show-and-tell exhib itors snack donors Finally should contain announcements national local events mall shows special pro grams modeling spectaculars like Striking Back expanded letter can anything youre capable cranking out really no limit specifically can contain such extra goodies true editorials soap boxes relating club activities can run articles things like safety build ing techniques consumer critiques unusual experiences Again best services can offer readers write up condensations major topics like frequency allocations new narrowband radios combating noise strat egies holding onto flying field list goes on Just remember keep little bird head forever lookout times newsletter editors may seem full perhaps baloney bs urge write vying blue ribbons Hall Fame nominations What want produce quality product readers can enjoy learn fromand just maybe doing club doesnt have newsletter seems strike home hope will think about doing yourself wont easy often youll find yourself working alone can guarantee work will much make club better club CL Scale/Boss Continued page 60 place wheel fully wrapped use CyA lock thread down harden balsa disk disk should now look like C sketch Before proceeding next step wheel-making lets go back bit point mark position spokes An easy way space spoke markings evenly around wheel first determine spokes Lets say will 24 spokes Dividing 24 3600 represents wheels outer rim find spoke mark should made 150 around rim use protractor should help marking spoke positions point can cut away thread crosses grooved inside balsa disk Now cut disk silk silkrayon blend about three four times size wheel using plenty dope apply fabric side wheel pulling fabric tight can Use rubberband other side hold extra fabric tightly place until dries dry cutaway extra cloth sharp knife apply fabric other side wheel using same procedure thread spokes show through look very realistic familiar idea covering spoked wheels would like point out photos of early planes appear have solid wheel hubs actuality have spoked wheels fabric covering over Therefore Bobs approach simulating spoked wheel produces very realistic-looking unit appears last thing have to either obtaln tire make First lets explore Bob Furrs approach making tire recommends visit local auto supply store will look around various sizes rubber tubes used vacuum hoses etc little effort can locate perfectly sized tire Before CyA glues next part very difficult however Bob says can now Cut rubber tubing just long enough reach way around hub wheel disk just completed Place tubing disk recess carefully glue hub CyA Continued page 159 156 Model Aviation