Boom Supersonic XB-1 breaks sound barrier over Mojave Desert

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January 28, 2025 2:59 PM EST

FILE PHOTO: The XB-1 demonstrator aircraft that Boom Supersonic is using to test more than 50 years of improvements in technology for their proposed aircraft, Overture, with which they hope to resurrect commercial supersonic air travel across the Atlantic

(Reuters) - About 35,000 feet (10,670 meters) over the Mojave Desert, northwest of Los Angeles, Boom Supersonic's XB-1 became the first privately funded airplane to break the sound barrier during a test flight on Tuesday.

"She was real happy supersonic," Boom Chief Test Pilot Tristan "Geppetto" Brandenburg said after landing, in a video posted by Boom Supersonic. "That's the best she's ever flown, was supersonic."

After getting to altitude, Brandenburg opened up the test plane's throttles, accelerating to Mach 1.1, or about 845 mph (1,360 kph) -- faster than the speed at which sound travels.

In 1947, Chuck Yeager became the first human to break the sound barrier when he pushed the Bell X-1 past Mach 1 during a flight over the Mojave Desert.

Boom Supersonic's XB-1 is a stepping stone in its plan to develop a commercially viable supersonic airliner, the Overture, capable of carrying 64-80 passengers across the Atlantic in about 3-1/2 hours.

The company has 130 orders and pre-orders from American Airlines, United Airlines and Japan Airlines.

Last year, it completed construction on its Overture Superfactory in Greensboro, North Carolina, where it plans to build 66 Overture aircraft per year.

(Reporting by Dan Catchpole in Seattle; Editing by Sandra Maler)


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