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SR-72: US secret hypersonic jet to allegedly break sound barrier in 2025 | Believed to be a top-secret project of the US Air Force, the SR-72 is touted to reach over 4,000 mph (6,437 kph), making i... (interestingengineering.com)

submitted 8 months ago by L4s@lemmy.world to c/technology@lemmy.world

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[-] CaptainSpaceman@lemmy.world 3 points 8 months ago

Can you explain what youre referring to?

[-] grue@lemmy.world 2 points 8 months ago

I don't believe for a second that the Air Force hasn't built something faster than the SR-71 in forty years, but I do believe they wouldn't have told us about it.

this post was submitted on 03 Jan 2024

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