John Uri
Johnson Space Center
OCT 13, 2023

On Oct. 15, 1958, the first X-15 hypersonic rocket-powered aircraft rolled out of its factory. A joint project among NASA, the U.S. Air Force, and the U.S. Navy, the X-15 greatly expanded our knowledge of flight at speeds exceeding Mach 6 and altitudes above 250,000 feet. Between 1959 and 1968, 12 pilots completed 199 missions, achieving ever-higher speeds and altitudes while gathering data on the aerodynamic and thermal performance of the aircraft flying to the edge of space and beyond and returning to Earth. The X-15 served as a platform for a series of experiments studying the unique hypersonic environment. The program experienced several mishaps and one fatal crash. Knowledge gained during X-15 missions influenced the development of future programs such as the space shuttle.



…