Boom Supersonic’s XB-1 ‘Baby Boom’ demonstrator aircraft has recorded its fastest ever speed during its fourth test flight signaling further progression towards its quest to reach Mach 1. 

Boom Supersonic’s XB-1 is paving the way for the developer’s full-size Overture aircraft by gathering invaluable data and testing state-of-the-art technologies. 

According to Boom Supersonic, XB-1 reached a new top speed of Mach 0.617, more than halfway to breaking the sound barrier.  

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