Results 1 to 9 of 9

Thread: LA Speed Test: SR-71 follies (fun with ATC and the Navy)

  1. #1
    Moderator Dr Mordrid's Avatar
    Join Date
    Apr 2001
    Location
    Westland, MI
    Posts
    24,963

    Cool LA Speed Test: SR-71 follies (fun with ATC and the Navy)

    This is the short version of a true story from the book 'Sled Driver: Flying The World's Fastest Jet' by the narrator: Maj. Brian Shul, USAF (Ret)

    At 89,000 feet and 2,000 knots/hr (2,300 mph/3,700 kph) they were doing about Mach 3.49.

    Last edited by Dr Mordrid; 29th July 2017 at 22:34.
    Dr. Mordrid
    ----------------------------
    An elephant is a mouse built to government specifications.

    I carry a gun because I can't throw a rock 1,250 fps

  2. #2
    The Berserker Jammrock's Avatar
    Join Date
    Aug 1999
    Location
    Right behind you.
    Posts
    8,951

    Default

    I love that story. I can't wait to see what the air speed of the SR-71 replacement is.
    “Inside every sane person there’s a madman struggling to get out”
    –The Light Fantastic, Terry Pratchett

  3. #3
    Super MURCer MultimediaMan's Avatar
    Join Date
    Sep 1999
    Location
    Bentonville, Arkansas, USA
    Posts
    1,844

    Default

    The SR-71 was replaced decades ago: The direct replacement in 1992 was the KH-11 Block III Satellite...KH-11 birds are basically Hubbles which point at the earth and have different focusing gear. They have since been replaced by the "KH-12" IKON-series KH-11 satellite: These satellites are Optical Imaging.

    Rhyolites and NORS/ Intruders handle SigInt and RORSAT Duties.

    These are the ones they talk about semi-publicly/ anecdotally.

    The really secret stuff we'll probably never see or hear about unless something goes wrong or someone squeals: Stealth Satellites, Active Background matching (the genesis of which dates all the way back to WWII).
    Hey, Donny! We got us a German who wants to die for his country... Oblige him. - Lt. Aldo Raine

  4. #4
    Moderator Dr Mordrid's Avatar
    Join Date
    Apr 2001
    Location
    Westland, MI
    Posts
    24,963

    Default

    Quote Originally Posted by MultimediaMan View Post
    The SR-71 was replaced decades ago: The direct replacement in 1992 was the KH-11 Block III Satellite...
    >
    The Lockheed Martin Skunk Works confirmed to Aviation Week that the SR-72 is a go. Combined cycle dual engines, Mach 6 strike-recon with the optionally manned flight research vehicle (FRV) the size of an F-22 flying in the early 2020's. Aerojet Rocketdyne is said to be pretty much done with the engine.

    10+ years to the full size bird, unless you believe in them sandbagging. I do.
    Dr. Mordrid
    ----------------------------
    An elephant is a mouse built to government specifications.

    I carry a gun because I can't throw a rock 1,250 fps

  5. #5
    The Berserker Jammrock's Avatar
    Join Date
    Aug 1999
    Location
    Right behind you.
    Posts
    8,951

    Default

    I can't even imagine the material science needed to fly at MACH 6, let alone the engine tech. That's going to be an amazing bird.
    “Inside every sane person there’s a madman struggling to get out”
    –The Light Fantastic, Terry Pratchett

  6. #6
    Moderator VJ's Avatar
    Join Date
    Mar 2001
    Location
    Belgium/Poland/Spain
    Posts
    9,118

    Default

    Doc: Is there any point in making it manned (even optionally)? I mean, it adds weight, puts restrictions on shape and limits maneuverability...

    Jammrock:
    I started googling... The Nasa X-43 reached Mach 9! https://en.wikipedia.org/wiki/NASA_X-43
    But yes, the science behind this must be crazy... particularly as there is no test-bed (wind-tunnel, etc) that could help with simulations/experiments...
    pixar
    Dream as if you'll live forever. Live as if you'll die tomorrow. (James Dean)

  7. #7
    The Berserker Jammrock's Avatar
    Join Date
    Aug 1999
    Location
    Right behind you.
    Posts
    8,951

    Default

    They've had unmanned rocket based "planes" hitting the higher MACH speeds, like the X-43. MACH 6 and manned is pretty amazing.

    Though I'm still waiting for someone to figure out single stage to orbit (SSO). That's when solar exploration will get interesting. Right now it's barely feasible to go to Mars because of the difficulties of getting back off Mars. But if we can make a vehicle capable of atmospheric escape without boosters... that makes exploration a bit more plausible.
    “Inside every sane person there’s a madman struggling to get out”
    –The Light Fantastic, Terry Pratchett

  8. #8
    Super MURCer Greebe's Avatar
    Join Date
    Aug 1999
    Location
    Bradenton, Florida
    Posts
    8,627

    Default

    Hmmm the SR can go a wee bit faster than published records state. Take your 2300 divide in half add that result to the original and you'll get a better idea.

    The pulse engines used on the replacement caused excessive stress for the airframe which was why the SR's were recommissioned and are still flying. Mach 6, polease, we were doing that back in the mid 1960's!
    "Be who you are and say what you feel, because those who mind don't matter, and those who matter don't mind." -- Dr. Seuss

    "Always do good. It will gratify some and astonish the rest." ~Mark Twain

  9. #9
    The Berserker Jammrock's Avatar
    Join Date
    Aug 1999
    Location
    Right behind you.
    Posts
    8,951

    Default

    Quote Originally Posted by Greebe View Post
    Mach 6, polease, we were doing that back in the mid 1960's!
    SHHHHHHH!!! We're not supposed to know that. I did have an Air Force friend that said MACH 6 was a more accurate speed for the SR-71. Something about doing a recon flight to South America in the middle of the world record run from LA to London.

    But since those are unofficial numbers I generally don't use them.
    “Inside every sane person there’s a madman struggling to get out”
    –The Light Fantastic, Terry Pratchett

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •