Rule of Thumb

ENTERING THE GROUND CUSHION

The ground cushion is an invisible area near the runway where the interaction between the airplane’s wing and the ground ...

The ground cushion is an invisible area near the runway where the interaction between the airplane’s wing and the ground cause changes in an airplane’s flight characteristics. Measured scientifically, the height of the ground cushion is about equal to the wingspan of the airplane. A pilot, however, will notice the effects at an altitude half the wingspan of the airplane. — Richard L. Collins, aviation writer

04/28/16

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