Flight 91X-15 United States Air Force Launch Status Success Thu · Aug 22nd, 1963 2:05 PM EDT Crew Joseph A. Walker Pilot Status: Deceased 2/20/1921 - 6/8/1966 Nationality: American Type: Government Agency: National Aeronautics and Space Administration Joseph Albert Walker was an American World War II pilot, experimental physicist, NASA test pilot, and astronaut. He was one of twelve pilots who flew the North American X-15, an experimental spaceplane jointly operated by the Air Force and NASA. Mission Flight 91 Type: Test Flight X-15 Flight 91 was a 1963 American crewed mission, and the second and final flight in the program to achieve sub-orbital spaceflight—a flight over 100 km in altitude. It was the highest flight of the X-15 program. Location Edwards Air Force Base Air launch to Suborbital flight 2 launches have been at this location. Rocket North American X-15 Length: 15.47 meters Diameter: 6.61 meters First Launched: June 8, 1959 The North American X-15 was a hypersonic rocket-powered aircraft operated by the United States Air Force and the National Aeronautics and Space Administration as part of the X-plane series of experimental aircraft. The North American X-15 rocket has been launched a total of 2 times with 2 successful and 0 failed launches. Agency United States Air Force Type: Government Abbreviation: USAF Administration: Founded: Launchers: Spacecraft: Country: USA View Rocket Launch Schedule