The US Defense Advanced Research Projects Agency (DARPA) has commissioned a vehicle for the US military called XS-1, short for "eXperimental Spaceplane 1." As the aircraft's name suggests ...

On this day in aviation history, January 19, 1946, the Bell X-1 high-speed research aircraft, made its first flight. While this first flight was in fact a gliding test, the X-1 would become the first ...

With so much going on, it’s no surprise that not many people have heard of the XS-1 Phantom Express ... Alternately referred to as the “DARPA Experimental Spaceplane”, the vehicle was ...

Northrop Grumman unveiled the potential future of space taxis when it released concept artwork of its proposed XS-1 Spaceplane on Tuesday. The XS-1 is one of three planes in a competition between ...