A Fort Worth defense contractor has been awarded contract to build a military aircraft prototype with high-speed vertical ...

For over 70 years, the X-planes have represented the cutting edge of American aerospace innovation, experimental aircraft ...

Meet the X-1: When it comes to testing airplanes the “X” designation means experimental. The first X aircraft was built in 1945 by Bell in partnership with the U.S. Army ...

Supersonic tunnel trials suggest the X-59’s shape can scatter shock waves, paving the way for hush-hush high-speed flight.

Boom Supersonic has gone, well, supersonic, its XB-1 prototype breaking the sound barrier today in the skies over the Mojave Air & Space Port in California. With Chief Test Pilot Tristan ...

A visitor looks at an exhibit of the Bell X-1 aircraft in the Air and Space Building when it was still located in the temporary metal building in the South Yard. Contained within Smithsonian ...

NASA is currently working on the X-59, a stiletto-like aircraft designed for quiet supersonic flight. The aircraft’s shape would stifle the sonic boom, making it sound more like the thunk of a ...

Even today, nearly sixty years after the X-15 was last flown in 1968, the aircraft still holds speed and altitude records. The X-15’s top speed: Mach 6.7, or 4,520 miles per hour.