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Former SR-71 engineer talks NASA's Blackbird revival program

110 points · 76 comments · rkagerer

gaigalas · 1791086277 · focus · HN ↗
When I see this, I can only think of modern high-altitude balloons. My gut tells me the SR-71 would be an ideal interceptor for that new threat (despite not being an interceptor itself).
The balloon issue cannot be addressed by any modern US aircraft, and spending expensive missiles on low cost balloons seems like wasting money and resources.
We'll know soon.
1. nradov · 1791092151 · focus · HN ↗
  The SR-71 was never designed as an interceptor, and would require extensive modifications to carry and employ weapons. Not going to happen. There was an earlier YF-12 interceptor program but it never proceeded beyond the prototype stage.
  High-altitude balloons are hardly a new threat. They have been used for decades, although some recent Chinese models are more capable than before. Regular tactical aircraft already in the US inventory are perfectly capable of shooting them down.
  <a href="https://www.af.mil/News/Article-Display/Article/3288579/f-22-safely-shoots-down-chinese-spy-balloon-off-south-carolina-coast/" rel="nofollow">https://www.af.mil/News/Article-Display/Article/3288579/f-22...
  1. gaigalas · 1791093268 · focus · HN ↗
    Current aircraft is not capable of reaching those balloons, read my other commentary. Your link points to a Chinese balloon that dropped way below its operational range.
    SR-71 or not, there are already contracts for filling this niche:
    <a href="https://www.war.gov/News/Contracts/Contract/Article/4613098/contracts-for-sept-28-2026/" rel="nofollow">https://www.war.gov/News/Contracts/Contract/Article/4613098/... (search for "swamp gas").
    If money is flowing to counter/develop high-altitude balloons and declared as urgent, it's likely it's flowing in more than one vein.
    The frame modifications you mentioned are already specified and tested, part of the YF-12 programme. It can easily carry air-to-air missiles instead of reconnaissance equipment, and the frame has flown with that configuration.
    <a href="https://en.wikipedia.org/wiki/Lockheed_YF-12" rel="nofollow">https://en.wikipedia.org/wiki/Lockheed_YF-12
    walrus01 · 1791097446 · focus · HN ↗
    > Current aircraft is not capable of reaching those balloons
    Is a missile a form of aircraft? Because there's variants of the Standard Missile which can hit a low earth orbit satellite, with the right timing, fired from effectively zero velocity and at sea level from a frigate.
    gaigalas · 1791098089 · focus · HN ↗
    Well, it's not reusable. You're wasting a resource destined for hypersonic deterrence on some sheets of mylar that float around.
    I mean, you can do that, but it would be a tremendous embarrassment.
    walrus01 · 1791098588 · focus · HN ↗
    > Well, it's not reusable
    No it's not. And it's indeed very costly. But on the grand scale of things of what the US DoD spends per day as a fully loaded lifetime cost to operate a single SSN, SSBN or aircraft carrier, it's a drop in the bucket. They spend absurd amounts of funds on all sorts of things.
    gaigalas · 1791105640 · focus · HN ↗
    Perhaps the issue is not money, but production capacity? Those take some time to build, and you don't want to deplete your stockpile on spy balloons.

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