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 ...

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 ...

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 ...

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 ...