The X-15 was the ultimate “X” vehicle. Built in the 1950s, she became the fastest and highest-flying winged aircraft of its time. X-15 Extending the Frontiers of Flight Book Cover.
NASA
X-15 Extending the Frontiers of Flight
By Dennis R. Jenkins
The X-15 was the ultimate “X” vehicle. Built in the 1950s, she became the fastest and highest-flying winged aircraft of its time. During 199 flights from 1959 through 1968, she collected data about hypersonic flight that was invaluable to aeronautics and to developers of the space shuttle. This e-book describes the genesis of the program, the design and construction of the aircraft, years of research flights and the experiments that flew aboard them.
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