Off Course by Mack Reynolds, Science Fiction, Fantasy

First on the scene were Larry Dermott and Tim Casey of the State Highway Patrol. They assumed they were witnessing the crash of a new type of Air Force plane and slipped and skidded desperately across the field to within thirty feet of the strange craft, only to discover that the landing had been made without accident.

Patrolman Dermott shook his head. "They're gettin' queerer looking every year. Get a load of it -- no wheels, no propeller, no cockpit."

They left the car and made their way to...