prop wash

noun, a current of water or air created by the action of a propeller or roter (COD)

“You’ve seen them, the yellow aircraft. The sky was full of those. You can’t believe it. And the thing — the kids don’t believe me — but they’d go cross the hayfield, and you’d see the prop wash on the top of the timothy. Grows what? Four feet I guess. And you could see the prop wash on the top of the timothy.”