THE wheels are off in the battle to achieve supersonic air travel as NASA’s “Son of Concorde” passes another major milestone.

On its 12th test flight, the Boom XB-1 prototype broke the sound barrier three times and achieved a top speed of Mach 1.1. On its 12th test flight, the Boom XB-1 prototype broke the sound barrier ...

Hermeus, a venture capital firm building high-speed aircraft, flew its Quarterhorse vehicle for the first time last week at Edwards Air Force Base in California, the company said. The aircraft, dubbed ...