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...
The speed of sound is roughly 750mph
This plane goes 4000mph. Thats like Mach 6 right?
Edit: looks like SR71 still holds the record for now
The unclassified record, sure.
Can you explain what youre referring to?
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.
grue@lemmy.world 8 months ago
The unclassified record, sure.
CaptainSpaceman@lemmy.world 8 months ago
Can you explain what youre referring to?
grue@lemmy.world 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.