The current subsonic speed record stands at 1,344 km/h (835 mph), set in 2020 by a New York to London flight that completed ... their true airspeed remained within normal cruising limits.
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Boom Supersonic's next-generation XB-1 passenger plane 1 step away from breaking the sound barrierOn Jan. 10, the XB-1 completed a sustained flight at 728 mph (1,172 km ... the XB-1 achieved a record 383 knots equivalent ...
Tom Dougherty is a digital content producer for CBS Philadelphia. Before joining CBS Philadelphia, Tom covered sports for NBC Sports Philadelphia. He currently covers breaking news and sports.
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