It reached Mach 1.1 about 12 minutes later, staying at that speed for around four minutes.
The aircraft broke the sound barrier a total of three times during its 33-minute flight.
The speed of sound through air is 767 mph (Mach 1).
XB-1 is a demonstrator prototype that’s one-third the scale of a commercial aircraftBoom Supersonicis developing called Overture.
It’s expected to be able to fly between London and New York in three and a half hours.
It will be the first large commercial aircraft to operate at net-zero carbon.
There have been eleven more test flights since then, culminating in this week’s world first.
The propulsion system, Symphony, will be different.
Boom Supersonic is working with several partners on some elements, including the engine design and development.
American Airlines, United Airlines, and Japan Airlines have made a combined 130 pre-orders for Overture.
All 113 people were killed and public confidence in Concorde’s safety was lost.
