X-Plane

NASA experimental aircraft series

Aircraft

NASA's X-59 rolls closer to supersonic flight – slowly

NASA's X-59 is taking slow steps towards supersonic flight, beginning taxiing tests at US Air Force Plant 42 in Palmdale, California. The final part of Phase One development, it's the precursor to faster ground tests before the aircraft's maiden flight.
Aircraft

From skies to simulations: X-66 transonic demonstrator plane shelved

NASA and Boeing have effectively cancelled the X-66 Transonic Truss-Braced Wing (TTBW) concept demonstrator aircraft. Officially described as a "pause," development of the thin-wing airplane is being halted in favor of ground-based testing.