On Aug. 22, 1963, U.S. Air Force Captain Joe Walker flew an X-15 space plane higher than any pilot had ever flown before. Walker reached an altitude of over 67 miles (108 kilometers). That's about 5 ...
National Security Journal on MSN
The Mach 6.7 monster: Why the X-15’s speed record still stands in 2026
Summary and Key Points: The X-15 program, spanning 199 flights between 1959 and 1968, pushed the boundaries of aeronautics into the hypersonic realm. -Capable of reaching altitudes of 102,000 feet, ...
An important part of data collection for the United States space program, the North American X-15 had astonishing performance utilizing the technology of the 1950s and 60s. The North American X-15 was ...
Dark Space Official on MSN
The forgotten X-15 missions that hit Mach 5.5 and touched space, then ended in tragedy years later
In 1963, a handful of tiny deviations pushed the X-15 beyond its planned ceiling, quietly turning one test flight into a historic civilian space mission. This is the story of Flight 90, the record ...
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