At 09:26 AM 11/1/2002 -0800, you wrote:
Cold peroxide does make some difference even with a hot pack. There are also reports in the literature about peroxide being COMPLETELY unreactive with silver packs at 30 F, so you can't even warm it with pulses.On Fri, 01 Nov 2002 08:16:06 -0800, Doug Jones <[EMAIL PROTECTED]> wrote:>I kinda get the impression that once the cat bed is warmed by a previous >pulse, subsequent ones should not have significant uncatalyzed >throughput, and PWM throttling keeps the bed hot. Good point. If we can assume the ambient temperature is above freezing - and for POGO, I think we can - than all we're talking about is cold peroxide's lag time. And I think Doug's right: if we put peroxide into a hot engine, I don't care how cold it is, it isn't going to have any lag time. >What's wrong with >simply giving each engine a few 50 ms pulses ten or twenty seconds >before liftoff? Armadillo did that with Spider. I don't recall if it was a warmup pulse, or just to verify the engines worked, but it's a good idea. -R
John Carmack
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