aileron drag

aileron drag

aileron dragclick for a larger image
Rising wing has increased aileron drag resulting in adverse yaw.
The yawing effect caused by the asymmetric drag of ailerons. Though present at all angles of attack, it becomes prominent at the stalling angle. The down-going aileron is normally deflected through a greater angle than the up-going ailerons; hence, the differential drag they produce results in the yaw.