Dean Delt-Air 250

The Dean Delt-Air 250 was an American twin-seat amateur-built, delta wing light aircraft. Designed and built by Herbert Dean of Flint, Michigan, the aircraft was destroyed on its first flight and Dean was killed.
Design and development.
The Delt-Air was a single-engined all-metal light aircraft powered by a Lycoming O-360 engine mounted at the rear driving a pusher propeller. It had a tricycle landing gear and rear-hinged canopy for access to the tandem cockpit. Registered "N6379T" it was destroyed during its first fatal flight on 8 November 1961.