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X-15

X-15
Air Force pilot William J. "Pete" Knight is seen here in front of the X-15A-2 aircraft (56-6671).

ECN-1025
Air Force pilot William J. “Pete” Knight is seen here in front of the X-15A-2 aircraft (56-6671). Pete Knight made 16 flights in the X-15, and set the world unofficial speed record for fixed wing aircraft, 4,520 mph (Mach 6.7), in the X-15A-2. He also made one flight above 50 miles, qualifying him for astronaut wings.1965NASA Photo / NASA photo› X-15 Project Description