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1. 06:05 AM - Re: Rudder trim (steveadams)
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Depending on how you fly, you may or may not want or need rudder trim. The 640
has the self centering notch on the nose gear which works pretty well in keeping
the front wheel centered in flight. You can adjust the rigging of the rudder
to give some offset, i.e.- the rudder will offset slightly to the right when
the front wheel is straight. Since the front wheel is held in a centered position
in flight, this slight offset in the rudder essentially provides a fair amount
of fixed trim to the rudder. The key is fine tuning the rigging during test
flight to give feet on the floor coordinated flight in your normal cruise
configuration. That way you won't spend 3 hours mashing the right pedal while
cruising. If you don't do a lot of cross country flying, you may want to consider
some type of variable trim system because you can only rig the rudder perfectly
for one specific flight configuration. Unless your airplane is bent or otherwise
out of rig, there should be no need for a fixed rudder trim as long as
you don't modify the self centering design of the nose gear.
Steve
N621J
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http://forums.matronics.com/viewtopic.php?p 3561#203561
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