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Model Forum / Radio Controlled / Helicopters / October 2007Tracking
What do you do when the 1/2 turn min adjustment on the pitch rod moves a blade from 10mm lower to 10mm higher !? Blades were balanced statically BTW > What do you do when the 1/2 turn min adjustment on the pitch rod moves > a blade from 10mm lower to 10mm higher !? > > Blades were balanced statically BTW Look for slop elsewhere in the system. The "washout" unit between the swashplate and rotor hub has been known to contribute to the symptoms you describe. Any other arms (bell/hiller mixers, etc.) that might have some slop in them will also contribute. Everything in the control system should move as freely as possible but have "no free play" at any point in that movement. If you find any ball links that are overly tight or any notchiness or binding, that could be part of your problem too! Good luck & let us know what you find, Fly Safe, Steve R. >What do you do when the 1/2 turn min adjustment on the pitch rod moves >a blade from 10mm lower to 10mm higher !? > >Blades were balanced statically BTW Sounds like the feathering shaft is bent, or you've got worn out dampers. (or both) FWIW - the linkage from the grip to the mixer arm works ok for "coarse" adjustments while the link from the swash to the mixer arm is good for "fine" adjustments. Thanks guys - fairly new to this so learning as I go. I guess I should have said its an ESKY CP Belt. I stripped it down today, and tightened / checked everything. Only suspect part now is some vertical play in the swashplate main bearing. Reset and test flown, I still can't quite get the tracking spot on - the only adjustment is in the pitch rods and it's too corse! |
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