AILERON, a hinged moveable part on the trailing edge of each wing for airplane roll (wing up and wing down) control.

副翼，铰连在每个机翼后缘的可动部件，用于控制飞机的滚转(机翼向上和向下)。

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When one row on one side blows air at a higher pressure than the other it causes the airflow over the trailing edge on that side to bend up or down, in exactly the way that an aileron would, and the plane rolls accordingly.

ECONOMIST: How to fly without ailerons