Countdown to Takeoff
- T-15 Minutes Livestream Starts: Join to see the XB-1 team prepare the aircraft for the supersonic test flight
- T-10 Engine Start: Three engines are started followed by pre-taxi checks
- T-0 Mission Start: The crew chief pulls the chocks and final pre-taxi checklist items are completed
- T+2 Taxi to Runway: XB-1 proceeds to the runway

Takeoff and Supersonic
- T+14 Takeoff: Control room calls for brake release and XB-1 initiates takeoff
- T+17 Climb: XB-1 ascends and sets up for the turn, preparing for the supersonic test run
- T+25 Supersonic Test: At 34,000 feet, the aircraft will accelerate to Mach 1.1, breaking the sound barrier
- T+29 Decelerate and Descend: After the supersonic test, XB-1 will slow down and set up for landing
- T+38 Approach and Landing: The Landing Signal Officer guides XB-1 down for a safe landing
Join the Livestream
Gain insights from the XB-1 flight team and watch XB-1 break the sound barrier. The livestream of the test flight is planned for Tuesday, January 28, 2025 at 7:45am PST/10:45am EST/3:45pm GMT.*
*Please note that flight date and time may change for mission safety or weather considerations.