Boom Supersonic, the American company building what promises to be the world’s fastest airliner, broke the sound barrier for ...

Denver-based Boom Technology's XB-1 demonstrator plane hit Mach 1.122 — 750 mph. It's the first independently developed ...

Even when you stand behind two thicknesses of armoured glass in the safety and comparative quiet of the test control room, you can sense the staggering power which one of these Concorde engines ...