Comment on 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...

LilDumpy@lemmy.world ⁨10⁩ ⁨months⁩ ago

Why does it take two years 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?

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