this post was submitted on 03 Jan 2024
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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 11 months ago by L4s@lemmy.world to c/technology@lemmy.world
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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...::undefined

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[โ€“] jettrscga@lemmy.world 17 points 11 months ago* (last edited 11 months ago) (1 children)

I feel like I'm taking crazy pills.

The speed of sound is 343 m/s, 767 mph. This description is Mach 5, 5x the sound barrier.

An F-22 can go 1500 mph.

Apparently the first airplane to break the sound barrier was Bell X-1 in 1947.

[โ€“] SwampYankee@mander.xyz 7 points 11 months ago

I think the intention is to highlight it as a milestone in the development of this aircraft. If you read the article, sounds like it hasn't even been on a test flight yet.