The North American X-15 was a fleet of three reusable rocket-powered hypersonic research aircraft developed by North American Aviation for a joint NASA, U.S. Air Force, and U.S. Navy program. The three airframes made 199 flights from 1959 through 1968, reached Mach 6.70 and 354,200 feet, and generated aerodynamic, heating, control, structural, and human-factors data used across Mercury, Gemini, Apollo, and Space Shuttle development.
Alerts for directly linked future launches and major activity.