The North American Aviation X-15 was a revolutionary aircraft that forever changed the landscape of aviation and space ...

The X-15 was the first plane to reach the 100,000-foot mark and fly at hypersonic speeds beyond Mach ... A big part of that knowledge came from the X-15 hypersonic rocket-powered research aircraft.

This is the first time anyone in the United States has flown a reusable hypersonic rocket plane since the last flight of the X-15, the iconic rocket-powered aircraft that pushed the envelope of ...

One approach to manned space flight is to put a man in a rocket and depend on a parachute or other drag-making device to ease him back to earth. ... Science: Into Space with the X-15; ...