differential aileron


differential aileron
Those ailerons whose extent of angular movement up and down is different. Normally, up-going aileron travels more than a down-going aileron. The parasite drag on the wing with the up-going aileron is higher to compensate for the additional induced and parasitic drag caused by the down-going aileron. This balancing of drag helps minimize adverse aileron yaw.

Aviation dictionary. 2014.

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