The world’s first independently developed supersonic jet

Designed, built, and tested in Centennial, Colorado, Boom’s supersonic technology demonstrator,  XB-1, recently moved to the Mojave Air & Space Port to continue flight preparations.

Built for speed

XB-1’s carbon composite and titanium fuselage is propelled by three General Electric J85 engines.

Aerodynamic Balance

The ogive (modified delta) wing balances low-speed performance for takeoff and landing with high-speed, supersonic flight performance.

Safety Diligence

The XB-1 team has completed hundreds of hours in the simulator for aircraft evaluation, operations development, and human factors assessments.

An Up-Close Look at XB-1

Program Advancements

Jeff Mabry, VP of XB-1, details the aircraft’s 2023 end-of-year milestones and its progress toward first flight, which is planned for early 2024.

XB-1 Taxi Testing

XB-1 has continued extensive ground testing since arriving at the Mojave Air & Space Port. Watch XB-1’s recent taxi test events.

XB-1 Rollout

Every feature of this aircraft is optimized for supersonic performance. Explore each of these key components.

XB-1 Program Developments

A look at XB-1’s progress towards first flight.

Fall ’23 – XB-1 Taxi Test Events

XB-1 progresses into taxi tests on the airfield and runway, resulting in successful events first achieving 60 knots, then 89 knots, and advancing to 94 knots during a medium-speed taxi test in November 2023.

8.23 – XB-1 Advances Flight Preparations

XB-1 progresses through extensive ground testing and receives an experimental airworthiness certificate from the Federal Aviation Administration (FAA), following a detailed aircraft inspection.


3.23 – XB-1 in Mojave

XB-1 arrives in Mojave to continue ground testing and preparations for first flight.

2021-2022 – Systems Integration & Engine Runs

XB-1 completes the activation and testing of all of XB-1’s internal subsystems and engine runs, culminating in the first low speed taxi test in November 2022.


10.20 – Rollout

XB-1 is fully assembled and revealed to the world for the first time.

9.20 – Weight on wheels

XB-1 stands on its own for the first time, with the full weight of the aircraft on wheels.


8.20 – Engines and inlets installed

Three J85-15 engines and supersonic inlets are installed to the aft fuselage.

8.20 – Aft fuselage install

The fully titanium aft fuselage is joined to the forward fuselage.


7.20 – Nose landing gear passed drop tests

The nose landing gear passed a series of drop tests at incrementally higher energy limits, verifying the landing gear’s performance up to an extreme of 184 kts (212 mph) at 15 feet per second decent rate.


6.20 – Forward fuselage closeout

The final significant bonding operation, closing of the forward fuselage, is complete.


3.20 – Wing testing

A simulation of the most extreme flight conditions verifying the wing design and approved the structure safe for flight.


3.20 – Lefthand fuselage skin install

The left hand skin install was the largest single bond operation, closing out the the left and right sides of the fuselage and providing a glimpse of the aircraft’s final shape.

2.20 – First flight of second-generation simulator

Assembly of the second-generation simulator enabled teams to finalize aircraft flight control design and enhance the pilot training program.


1.20 – Wing closeout

The wing structure transformed from a skeleton frame to a completely closed unit during this eight-hour bond event.


12.19 – Nose landing gear and cockpit bond

This twenty hour bond event joined the nose landing gear bay and cockpit together, sealing the structure into the right hand fuselage skin.


Mojave: Home to History

XB-1 will add to the list of historic aviation events in Mojave as the world’s first independently developed supersonic jet.

Stay up to speed

Subscribe to the newsletter for Boom news and insights straight to your inbox.