SR-72: US secret hypersonic jet to allegedly break sound barrier in 2025
interestingengineering.com
Widely reported as the fastest plane ever developed, Lockheed Martin's SR-72 "Son of Blackbird" will test the claim sometime in 2025.

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

  • CaptainSpaceman@lemmy.world
    English
    10·
    11 months ago

    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 at Mach 3.5 or around 2000mph

    • grue@lemmy.worldEnglish
      8·
      11 months ago

      Edit: looks like SR71 still holds the record for now

      The unclassified record, sure.

        • grue@lemmy.worldEnglish
          2·
          11 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.