Convair XF-92A

The Convair XF-92A was the first delta-winged aircraft for the United States. The delta wing design had a number of advantages, including that it reduced drag and could be built thin while remaining strong. It was powered by an Allison J33-A turbojet engine.

Between 1948 and 1953, it flew more than 300 times for the National Advisory Committee on Aeronautics (NACA, the predecessor to NASA), as well as for Convair and the Air Force. Only one airframe was built.

"Nobody wanted to fly the XF-92," NACA test pilot Scott Crossfield said. "There was no lineup of pilots for that airplane. It was a miserable flying beast."