National Security Journal on MSN

The X-15 Hit Mach 6.7 and Put Every Military on Earth On Notice

In 1967, USAF Major “Pete” Knight set a world speed record that remains “unbroken” 68 years later. -Flying the X-15A-2 rocket ...
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X-15: The Rocket Plane That Flew to Mach 6.7

While the SR-71 Blackbird gets all the press, the rocket-powered X-15 has its own richly deserved place in the aviation history record books: on October 3, 1967, U.S. Air Force test pilot William ...
SlashGear

The Unique Landing Technique Of The Fastest Manned Aircraft Ever Built

An aircraft capable of hitting 4,520 mph (nearly seven times the speed of sound) is ludicrous to even think about, but the North American X-15 achieved this, defying comparison to any other aircraft ...
The National Interest

The X-15 was a Starfighter in All But Name

The X-15 was a key bridge between conventional atmospheric flight and spaceflight. The North American X-15 is one of the most groundbreaking aircraft ever created in the history of aviation and space ...
insider.si.edu

X-15 : the world's fastest rocket plane and the pilots who ushered in the space age / John Anderson, Richard Passman

"The X-15, which flew from 1959-1970, is still the most advanced research aircraft ever developed and flown, and hangs in a place of honor in the Smithsonian's Air and Space Museum. Its test pilots ...