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

  • Poem_for_your_sprog@lemmy.worldEnglish
    3·
    6 months ago

    Then why do we still operate the U2? SR-71 was operated all the way until 1999. Hubble was launched in 1990 so the large mirrors for spy telescopes had to have been in use well before that.