Inside the groundbreaking design of Boom Supersonic’s ultrafast jet

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 again—and again.

“It is surprisingly kind of anticlimactic,” Tristan ‘Geppetto’ Brandenburg says about the time he broke the sound barrier. “You don’t hear a sonic boom from the cockpit because you are leaving the shock waves behind you. You can only feel that she is happy flying at supersonic speed.”