Transient bursts of lift can also be generated by the wings as they change their angle of attack at the top and bottom of each stroke - rotational lift (Wootton, 1999).

• 瞬态扫射电梯也可以所产生的翅膀，因为他们改变他们的攻角在顶部和底部的每个中风-旋转升降机（ w ootton， 1 999年） 。