Boomless Cruise is based on physics known as the Mach cutoff, in which a sonic boom refracts in the atmosphere and never ...

A Colorado-based company said it broke the sound barrier three times without generating a sonic boom that reached the ground.

Boom hopes its breakthrough will allow supersonic flights over land, making US coast-to-coast flights 90 minutes faster.

Aerospace startup Boom says they've proven quiet supersonic flight is possible with their passenger airplanes after a ...

During the second supersonic flight of the XB-1 technology demonstrator today, the jet exceeded Mach 1 three times without a ...

When the experimental XB-1 aircraft achieved supersonic speeds on a test flight, it did not create a disruptive sonic boom – ...