First flight of the Lockheed XH-51A Compound

Monday, September 21, 1964



This was the XH-51A fitted with awing and a turbojet mounted on the port wing. It achieved a speed of 302.6 mph/487 km/h. The first flight was conducted by Don Segner. For this initial flight the turbojet was not used. The first flight when the jet engine was igited took place on Apr 10, 1965.

Source: "Rigid Rotor Rewind: Lockheed Helicopters Come Full Circle", Raymond L. Robb, VERTIFLITE March/April 2017, Page 51


Aircraft related to this milestone
Lockheed XH-51A Compound