Radio Control: Helicopters

RADIO CONTROL HELICOPTERS U U DURING THE FLYING season received letters calls about pitch curves What needed make initial adjustments Cant computer radio setup need Since valid questions concerns good time tackle subject term pitch curve may seem complicated its nothing adjusting collective pitch helicopter make perform desire nice things about helicopters can make perform specifications within reason making fairly simple changes setup rotor system years ago helicopter radios high low pot adjustment pitch curve radios Im referring bunch knobs under protective cover usually back radio enabled user adjust high low endpoints particular pitch curve radio made straight-line change between set points However radios some serious drawbacks modern computer radios have attempted fix end points pitch curve difficult set because no readout pot position pitch gauge mounted rotorblade small changes made pots until desired reading obtained difficult no way tell what settings looking radio changes field hit-and-miss pots tweaked improve helicopter performance pitch curve really curve setting endpoints straight-line change between Im sure called curve except hovering pitch knob did make change hover pitch therefore curve such made point of talk about new computer radios point out some features see make helicopter setup much easier past computer radios people using pilots have ability make curve just want resulting improvements helicopters flying performance example collective pitch range needed hovering normal forward flight what best aerobatics different acrobatic maneuvers better flown own pitch curves Futaba 8UHF helicopter radio instance offers standard normal pitch curve plus additional aerobatic curves idle up 1 2 another autorotations using throttle hold curves really curves just endpoint adjustments because three points curve can adjusted independently two end points total five points can adjusted pitch curve choice Another nice feature 8UHF pitch curve displayed digital readout servo throw percentage means factory default years ago helicopter radios high low pot adjustment pitch curve~ curve shown digital percent values 0- 25- 50- 75- 100% positions draw standard pitch curve would straight line However now have opportunity change shape curve simply changing digital values curve Although changing shape pitch curve will change hopefully improve flying characteristics helicopter its important make sure starting straight line make changes sounds easy enough since factory settings mentioned above straight line problem develops dont want start end points 0- 100% Suppose put pitch gauge rotorblade determine low-end angle attack want obtained 10% high-end point 90% leave three other points factory settings 2550- 75% problem becomes can adjust endpoints values need set other points along curve correct settings give straight-line curve starting point easy way simple mathematics help almost inexpensive electronic calculator Use following steps once high low endpoints determined case use 10- 90% points 1 Subtract low point high point get pitch range PR PR 0 number pitch curve deviations D equal number points curve can set minus Since five points can adjusted example D can find straight-line percentage change PC deviation dividing PR D PC 80 - 4 Start first low point keep adding PC get straight-line points 10 first point 30 second point 30 20 iddle point 50 20 ourth point 70 20 igh-end point numbers easy calculate example its just easy calculator find PR PC keep adding PC successive point Engine Update As mentioned previously Im working Dub Jett Jett Engineering 6110 Milwee Suite J Houston TX 77092 see highquality performance engines will work helicopters have Sport 40 Ergo continues perform now have opportunity change shape curve simply changing digital values curve flawlessly available power larger 46 have ever used Ergo tached rotor speed 2000 rpm forward flight Thats really moving have flying combination several months engine showing great idle smooth transition idle since set needle valve havent make adjustment keep trying find fault engine havent done hope work Dub check out other engines helicopter use will let know perform ber1997 115