Boom Supersonic built a supersonic plane for a fraction of the cost of NASA's X-59. Now all that's left to do is build it ...

But while the successful test flight of XB-1 shows that supersonic flight without sonic booms is technically feasible, the next phase is making it economically feasible. Right now, both subsonic and ...

"This image makes the invisible visible — the first American made civil supersonic jet breaking the sound barrier." ...

They also confirmed no sonic boom reached the ground during XB-1 demonstrator ... first American-made civil supersonic jet breaking the sound barrier. Thanks to Geppetto's exceptional flying ...