north american x 15

  • 12 of the Weirdest X-Plane Designs

    12 of the Weirdest X-Plane Designs

    X-planes are a class of experimental aircraft designed to test and demonstrate new innovations in flight—some were created for NASA, others for DARPA or the U.S. military. The first X-plane, X-1, was flown by Chuck Yeager in the 1940s and was the first craft to fly faster than the speed of sound. Over the decades,…