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Old Aug 10, 2010, 02:11 PM
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AKA Don
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United States, MI, Houghton Lake
Joined Dec 2002
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Any off axis of a motor will pull the nose of the plane in the direction of the offset when power is increased.

15 degrees sounds like way too much.

High wing, tractor, planes normally use some right thrust to offset the prop blast effect on the vertical stab and the roll effect of the motor torque reaction. They also commonly have some down thrust to balance the wings tendency to pull the nose up with increased speed. When the offsets are right the plane just accelerates forward and begins a shallow climb when power is increased. Like wise the plane maintains heading and just lowers the nose when power is removed. If the thrust angle is wrong the plane will pull right or left and up or down when the throttle setting is changed. You can fly it but it takes alot more stick motion to keep it headed in the desired direction.
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