Old 09-18-2008, 09:35 PM
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Default RE: What is the effect of flap on attitude?

ORIGINAL: lejongleur
But my real question is - does adding flaps pitch the nose up or down? As they are behind the CG, I would think that they might tend to lift the tail rather than the nose.

There is no one correct answer on this as It can be either way depending on many factors including the pitching moment of the airfoil used and many other varibles.

One can generalize however that the more common reaction with our typical airplanes is a pitchup.

If you are asking this in anticipation of programing in a flap to elevator preset mix then I would suggest holding off on doing so untill you actually flew the aircraft and tried it to give you an idea of which direction and percentage of preset you wanted.