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ScotY
Feb 09, 2003, 12:37 AM
Can someone please help me figure this out...I have a rudder/elevator plane and it turns left with very little elevator needed to maintain altitude, but to turn right it requires a lot of elevator or it will start to pitch down quite drastically. Also, in a level right turn, it will appear to have a bad case of adverse yaw...even without any ailerons. :confused:

I know this must all indicate that something is bent, crooked, etc. Where do I start? This is a foam GWS Piper Cub so it's not the most precisely built model.

Dick Huang
Feb 09, 2003, 03:42 PM
ScotY,
A normal tractor airplane using a counter-clockwise rotatating prop (looking aft) will exihibit the following due to gyroscopic loads under power:
Right turn, nose down
Left turn, nose up
Up elevator, right turn
Down elevator, left turn.
If this Gyro effect only happens under power then youve found the problem, however if it happens also in the glide then most likely you have a warped wing. Look at the wing through the trailing edge to see if you can see the warp. Use heat to untwist the warp. When the warp is removed the power on gyro effect will be greatly reduced.
Dick Huang:)