x-plane

NASA is developing an imaginary aircraft, flying faster than the speed of sound
The space agency's budget also requires a grant for a new type of aircraft that appears to exist only in sketches and in the imagination of NASA engineers: the X-Plane plane.
NASA orders to build a new generation supersonic jet
According to NASA, this $ 247.5 million contract will include design, manufacturing and finished aircraft that will have the first test flight in 2021.
The US is about to launch 20 times faster than sound
Space.com says the US Defense Advanced Research Projects Agency (DARPA) plans to develop and test a 20-speed supercar called the X-Plane, the Mach 20.