PPRuNe Forums - View Single Post - Use of rudder during aircraft rotation
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Old 11th December 2006 | 14:32
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Rainboe
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Joined: Jan 2005
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From: Hampshire, UK
Because of the crosswind element, as the aeroplane lifts off, it becomes in a slight yaw situation as the relative direction of the wind is not aligned with the runway direction, which is what the aeroplane is pointing in. This yaw situation results in the aeroplane naturally turning slightly into wind by itself. Only a small gesture is needed to complete the heading change you want to allow enough drift to maintain track. A small turn on the ailerons is all that is needed. I don't think you should use rudder- you are causing another yaw situation, and when you remove the rudder input, you are creating a reverse yaw situation in the other direction. It is probable that you will not end up with the aeroplane settled on the heading you want after all that yawing in either direction, so IMO just use a little aileron to turn where you want it and keep the aeroplane balanced. Anytime you try and use rudder as a turn aid, you create a roll element and it just becomes untidy.
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