A startup wants to revive the Concorde for the generations of flyers that missed out, without the noisy boom and the up to $20,000 ticket prices.

During the second supersonic flight of the XB-1 technology demonstrator today, the jet exceeded Mach 1 three times without a boom being detected by microphones on the desert floor below.

Boom Supersonic’s XB-1 creates a sonic boom inaudible from the ground below when flying at the exact right speed and altitude.