Trimming

[Gregory Morris]

I have a newbie plane trimming question.

On my new plane if I trim for straight and level flight at full throttle,
then reduce the throttle to say half I need to put up trim in to maintain
level flight. I know a slight amount of up trim may be required, but I think
in my case it might be excessive. Also, when the plane is trimmed for
straight and level flight, the elevator has a few degrees of down  instead
of  neutral. Up and down lines are relatively straight. The wing and stab
incidences are fixed, and can't be changed. The plane hunts a little in
pitch, but I think it is due to trimming the elevator at one speed, and
flying at another. Inverted flight takes just a breath of down pressure to
maintain level flight.

Question is.. will a CG change(move back more, or forward), or the addition
of down thrust help this condition, or do I just adjust the elevator trim
for a happy medium, and live with it. Does anybody have any ideas?

Thanks
Greg Morris


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