Flight 91
X-15
United States Air Force
Crew

Joseph A. Walker
- Birthday: 02/20/1921
- Role: Pilot
- Nationality: United States of America
- First Flight: 01/17/1963
- Last Flight: 08/22/1963
Joseph Albert Walker was an American World War II pilot, experimental physicist, NASA test pilot, and astronaut. He was one o...
Mission
Flight 91
- Type: Test Flight
- Orbit: Suborbital
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.
Rocket
North American Aviation North American X-15
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.
Agency
United States Air Force
The United States Air Force (USAF) is the air service branch of the United States Armed Forces, and is one of the eight uniformed services of the United States. Originally created on 1 August 1907, as a part of the United States Army Signal Corps, the USAF was established as a separate branch of the United States Armed Forces in 1947 with the enactment of the National Security Act of 1947.