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

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[–] LilDumpy@lemmy.world 12 points 10 months ago* (last edited 10 months ago) (4 children)

Why does it take one year for this plane to warm up before it breaks the sound barrier? Aren't there planes that already break the sound barrier in minutes/seconds and not take years?

[–] Person264@lemmings.world 2 points 10 months ago

They'll test it on the ground and flying slowly first before going fast to make sure it's safe enough.

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