RADIO CONTROL HELICOPTERS F WASNT TOO LONG AGO happy new breed helicopter radios let us set pitch curve capability important helicopter fliers because collective pitch range needed hovering normal ward flight what best aerobatics Different aerobatic maneuvers better flown own pitch curves radios Im referring bunch knobs under protective cover usually back radio enabled user adjust high low end points particular pitch curve radio made straight-line change between set points However radios some serious drawbacks modem computer radios have attempted fix First end points pitch curve little difficult set because no readout pot position pitch gauge mounted rotor blade small changes pots made until desired reading obtained really difficult no way tell what settings simply looking radio changes field rather hit-andmiss pots tweaked improve helicopter performance pitch curve really curve rather setting end points straight line change between Im sure ever called curve except hovering pitch knob did make change hover pitch therefore curve made point talk about new computer radios point out some features see make helicopter setup much easier past Considering Figure 1 Collective Pitch 100 0 75100 02550 Stick Position 75 50 25 Futaba Super Seven helicopter radio example finds offers standard normal pitch curve plus additional aerobatic curves idle up two another throttle hold curves really curves just end point adjustments Three points curve can independently adjusted can two end points total five points can adjusted pitch curve choice Another useful feature radio pitch curve displayed digital readout servo-throw percentage factory default curve shown digital percent values 0 25 50 75 100% positions standard pitch curve drawn Figure 1 line can see represents straight line However now shape curve can changed simply modifying digital values curve Line B shows same curve values changed 0 35 60 85 100 Although altering shape pitch curve will change chances improve flying characteristics helicopter its important first make sure starting straight line make changes surface sounds easy enough since factory settings mentioned above shown Figure 1 yield straight line problem develops dont want start end points 0 100% Lets suppose put pitch gauge rotor blade determine low-end angle attack want obtained 10% high end point 90% Leaving three other points factory settings 25 50 75% pitch curve would really look like line C So problem becomes can adjust end points values need set other points along curve correct settings give us straight-line curve starting point Luckily us easy way simple mathematics help almost inexpensive electronic calculator Use following steps once high low end points determinedin case will use 10% 90% points mentioned 92 Model Aviation Petal Manufacturing Beacon installed X-cell 60 bright red plastic helps orientation practicing switchiess inverted maneuvers AIRPLANES THAT FLY SMOOTH AND SWEET LAND LIKE TRAINERS THE MOST POPULAR TRAINER IN AVIATION HISTORYI Nor-Cal Aero Kit AT-6ISNJ HARVARD Span 65 Area 656 WI6-8 Eng 60-90 NC6000 Span63 Area636 Wt5-6 Eng46-90 PEE TEE Span63 Area633 Wt57 Eng 46-80 VULTEE BT-13 Span73Area773 Wt8-10 Eng60-1 20 CONTINENTAL Span72 Area766 Wt6-7 Eng46-90 THE SRE SpanUp 62 Lw 54 Area1140 Wt9 Eng80-120 Orders 1-800-227-6753 Shipping $500 COD $500 Hours 9 00-5 00 Tue-Sat Pacific Within 48 States1 Send Check Money Order Ship within 24 Hours ices subjeci change Dealer Inquiries Invited SEND $100 FOR ILLUSTRATED BROCHURE 1 Subtract low point high point get pitch range PR example PR 0 The number pitch curve deviations D equal number points curve can set minus Futaba Super Seven five points capable being adjusted mentioned above Therefore example 0 4 3 Now can find straight-line percentage change PC deviation dividing pitch range deviations example PC Now just start first low point keep adding percen tage change get straight line points example 10 first point 30 second point 30 50 middle point 50 70 fourth point 70 90 already know high end point example numbers easy calculate calculator its just easy find correct numbers PR PC keep adding PC successive point New products Petal Manufacturing 58 Spen cer Rd Basking Ridge NJ 07920 Tel 908 766-7095 has recently introduced its Beacon head button X-cell helicopter Beacon made bright red Plexiglas mounts hole provided X-cell head improve visibility helicopter flight Although can also used slow stop rotor blades careful because spinning plastic can burn hand quickly Contact Petal Manufacturing information Beacon Saber 6 transmitter tray JR Radicals has pair really small receivers calls Mini Credit Card Receivers havent chance try PCM version designated 736 have using 226 EM version Shuttle ZX As can see photo receiver certainly small enough almost looks lost small radio area years ago customary magazine article talk about electronic circuitry receiver need know about pair both use JRs patented ABC&W circuitry block out desired signal FM version also has special circuit ignores stray signals transmitter turned off compatible JR FM systems receivers will real hit small helicopters space weight premium keep performance up well smaller airplanes gliders cars boats never enough space equipment needed information see local hobby dealer call Horizon Service Center 217 355-9511 JA Products 213 Irick Rd Mt Holly NJ 08060 Tel 609 267-2065 produces shaft-driven tail-rotor drive kits Miniature Aircraft TSK Kalt Schluter lines helicopters drive shaft lightweight high-strength glass-epoxy tube supported two evenly spaced ball bearings Also provided precisionmachined coupler shafts end enabling quick disconnect either tail rotor gearbox tailboom mainte nance kits come completely assembled ready install together diagrams easy-to-read step-by step instructions ember1993 93 4 FAVORITE FOR AEROBATICS AND SMOOTH LANDINGS AT ALL SPEEDS SALE $13995 SIX FOOT BIG VERY STABLE FLIGHT GENTLE LANflIMGS SPORT SCALE THROUGHOUT TAPERED WING SPORT SCALE IMAA LEGAL raft CARS * BOATS * AIRCRAFT P0 Box 1173 Project City CA 96079 quarter standard JR PCM 9 receiver gives idea small new JR Credit Card Receiver is
Edition: Model Aviation - 1993/09
Page Numbers: 92, 93
RADIO CONTROL HELICOPTERS F WASNT TOO LONG AGO happy new breed helicopter radios let us set pitch curve capability important helicopter fliers because collective pitch range needed hovering normal ward flight what best aerobatics Different aerobatic maneuvers better flown own pitch curves radios Im referring bunch knobs under protective cover usually back radio enabled user adjust high low end points particular pitch curve radio made straight-line change between set points However radios some serious drawbacks modem computer radios have attempted fix First end points pitch curve little difficult set because no readout pot position pitch gauge mounted rotor blade small changes pots made until desired reading obtained really difficult no way tell what settings simply looking radio changes field rather hit-andmiss pots tweaked improve helicopter performance pitch curve really curve rather setting end points straight line change between Im sure ever called curve except hovering pitch knob did make change hover pitch therefore curve made point talk about new computer radios point out some features see make helicopter setup much easier past Considering Figure 1 Collective Pitch 100 0 75100 02550 Stick Position 75 50 25 Futaba Super Seven helicopter radio example finds offers standard normal pitch curve plus additional aerobatic curves idle up two another throttle hold curves really curves just end point adjustments Three points curve can independently adjusted can two end points total five points can adjusted pitch curve choice Another useful feature radio pitch curve displayed digital readout servo-throw percentage factory default curve shown digital percent values 0 25 50 75 100% positions standard pitch curve drawn Figure 1 line can see represents straight line However now shape curve can changed simply modifying digital values curve Line B shows same curve values changed 0 35 60 85 100 Although altering shape pitch curve will change chances improve flying characteristics helicopter its important first make sure starting straight line make changes surface sounds easy enough since factory settings mentioned above shown Figure 1 yield straight line problem develops dont want start end points 0 100% Lets suppose put pitch gauge rotor blade determine low-end angle attack want obtained 10% high end point 90% Leaving three other points factory settings 25 50 75% pitch curve would really look like line C So problem becomes can adjust end points values need set other points along curve correct settings give us straight-line curve starting point Luckily us easy way simple mathematics help almost inexpensive electronic calculator Use following steps once high low end points determinedin case will use 10% 90% points mentioned 92 Model Aviation Petal Manufacturing Beacon installed X-cell 60 bright red plastic helps orientation practicing switchiess inverted maneuvers AIRPLANES THAT FLY SMOOTH AND SWEET LAND LIKE TRAINERS THE MOST POPULAR TRAINER IN AVIATION HISTORYI Nor-Cal Aero Kit AT-6ISNJ HARVARD Span 65 Area 656 WI6-8 Eng 60-90 NC6000 Span63 Area636 Wt5-6 Eng46-90 PEE TEE Span63 Area633 Wt57 Eng 46-80 VULTEE BT-13 Span73Area773 Wt8-10 Eng60-1 20 CONTINENTAL Span72 Area766 Wt6-7 Eng46-90 THE SRE SpanUp 62 Lw 54 Area1140 Wt9 Eng80-120 Orders 1-800-227-6753 Shipping $500 COD $500 Hours 9 00-5 00 Tue-Sat Pacific Within 48 States1 Send Check Money Order Ship within 24 Hours ices subjeci change Dealer Inquiries Invited SEND $100 FOR ILLUSTRATED BROCHURE 1 Subtract low point high point get pitch range PR example PR 0 The number pitch curve deviations D equal number points curve can set minus Futaba Super Seven five points capable being adjusted mentioned above Therefore example 0 4 3 Now can find straight-line percentage change PC deviation dividing pitch range deviations example PC Now just start first low point keep adding percen tage change get straight line points example 10 first point 30 second point 30 50 middle point 50 70 fourth point 70 90 already know high end point example numbers easy calculate calculator its just easy find correct numbers PR PC keep adding PC successive point New products Petal Manufacturing 58 Spen cer Rd Basking Ridge NJ 07920 Tel 908 766-7095 has recently introduced its Beacon head button X-cell helicopter Beacon made bright red Plexiglas mounts hole provided X-cell head improve visibility helicopter flight Although can also used slow stop rotor blades careful because spinning plastic can burn hand quickly Contact Petal Manufacturing information Beacon Saber 6 transmitter tray JR Radicals has pair really small receivers calls Mini Credit Card Receivers havent chance try PCM version designated 736 have using 226 EM version Shuttle ZX As can see photo receiver certainly small enough almost looks lost small radio area years ago customary magazine article talk about electronic circuitry receiver need know about pair both use JRs patented ABC&W circuitry block out desired signal FM version also has special circuit ignores stray signals transmitter turned off compatible JR FM systems receivers will real hit small helicopters space weight premium keep performance up well smaller airplanes gliders cars boats never enough space equipment needed information see local hobby dealer call Horizon Service Center 217 355-9511 JA Products 213 Irick Rd Mt Holly NJ 08060 Tel 609 267-2065 produces shaft-driven tail-rotor drive kits Miniature Aircraft TSK Kalt Schluter lines helicopters drive shaft lightweight high-strength glass-epoxy tube supported two evenly spaced ball bearings Also provided precisionmachined coupler shafts end enabling quick disconnect either tail rotor gearbox tailboom mainte nance kits come completely assembled ready install together diagrams easy-to-read step-by step instructions ember1993 93 4 FAVORITE FOR AEROBATICS AND SMOOTH LANDINGS AT ALL SPEEDS SALE $13995 SIX FOOT BIG VERY STABLE FLIGHT GENTLE LANflIMGS SPORT SCALE THROUGHOUT TAPERED WING SPORT SCALE IMAA LEGAL raft CARS * BOATS * AIRCRAFT P0 Box 1173 Project City CA 96079 quarter standard JR PCM 9 receiver gives idea small new JR Credit Card Receiver is