X-Plane

NASA's X-59 Quiet SuperSonic Technology (QueSST) experimental supersonic aircraft took to the skies for the first time on October 28, 2025 from Lockheed Martin's famously secret Skunk Works at the US Air Force Plant 42 in Palmdale, California.

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.

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.