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US-made reusable Hadley liquid rocket engine hits Mach 5 in 10 flights

A US aerospace and defense company has taken a huge step towards operational hypersonic systems after recently completing a total of 10 consecutive flights with a reusable liquid rocket engine. Colorado-based Ursa Major offers flight-proven capabilities for hypersonics, solid rocket motors, space mobility, and launch. And its Hadley engine has now flown 10 times, several of which at sustained hypersonic speeds with Stratolaunch, a private US aer…

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Interesting Engineering broke the news on Thursday, April 30, 2026.
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