2 ms·

That's true, but it doesn't really address the question. If the cracks are a result of flight stresses, test stand burns won't reveal them.

• aeturnum 10y ago
  If the tests don't simulate flight stresses, they are bad tests.
  • xorxornop 10y ago
    It's simply not possible to test that. This much is obvious if you've thought deeply about the nature of rocket testing. You MUST fly to _really_ test.
  • scott113341 10y ago
    Is there a good way that you're aware of to simulate the acceleration experienced by a rocket?
    • JshWright 10y ago
      You're talking about a turbopump spinning at several tens of thousands of rpms, at very high temperature. Yes, a couple g's of lateral acceleration adds a bit too those stresses, but it's a fairly minor effect, I'm sure. I think it's vastly more likely they're cracking from the rotation speed, temperature, and pressure.
      • gozur88 10y ago
        I expect this is true, but I'd like to have a whole lot more information than the article contains. Specifically, under what conditions the cracks are observed.
        • JshWright 10y ago
          The cracks were observed during ground testing, several years ago.