RE: Delta IV-H under performance

From: Kevin Fetter (
Date: Wed Dec 22 2004 - 10:43:58 EST

  • Next message: Bruce MacDonald: "Re: Delta IV-H under performance"

    --- Ted Molczan <> wrote:
    > I have been wondering about that too. I know that in terrestrial combustion
    > processes, even a few percent insufficient oxygen results in a severe loss of
    > efficiency, and one of the telltale signs is a yellowing of the flame. I know
    > next to nothing about the norms of rocket combustion. Do those concepts apply
    > equally there?
    I don't see why not. Since color of the flame is related to the temp of the flame, then the level
    of fuel and O2 would effect it, at least in my train of throught. Plus the flame is heating up the
    air which has particles in to to effect the color, at least my way of thinking. Doesn't mean it
    > Spaceflight Now reports that the outer CBC rockets appeared to shut down 8 s
    > early:
    Just my thought, it might have to do with the software, and the calculations of planned
    trajectory. To me shutdown means complete shutdown of the rocket, so no burning occur's. The
    rocket motor were still burning after the two side rocket's were ejected from the rocket, looking
    at the video. So the computer messed up:)
    I wait and see what the real reason was, after then look at the data.
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