North American Aviations X-15 rocket plane flew at Mach 6.72 and at altitudes above 67 miles -- at the threshold of space. The men who piloted this amazing plane became the USAFs first astronauts. Powered by an XLR-99 engine capable of producing 70,000 pounds of thrust at peak altitude, the X-15 pushed the flight envelope for manned aircraft past the post office. Notably, both Apollo astronaut Neil Armstrong and Space Shuttle commander Joe Engle piloted the X-15. Originally published by North American for the USAF and later NASA, this Flight Operating Handbook represents a 1963 update...
North American Aviations X-15 rocket plane flew at Mach 6.72 and at altitudes above 67 miles -- at the threshold of space. The men who piloted this a...
