National Security Journal on MSN
The Mach 6.7 X-15 ‘Hypersonic Rocket Plane’ Has a Message for the U.S. Air Force
The X-15 was a rocket-powered research aircraft that pushed human flight to the edge of space and deep into the hypersonic ...
On this day in aviation history, 66 years ago (September 17, 1959), the North American X-15 made its first powered flight. At the controls was legendary test pilot Scott Crossfield, renowned for his ...
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