Ian Woollard wrote:
Randall Clague wrote:
I'm missing something. Why would the glue melt. Especially in a LOX tank?
Hey, that's a point. How hot does the HTP vapour get in the ullage space of ERPS's rockets? 60C rise == detonable?
It should be pretty near the original temperature... or slightly below,
since the ullage is pressurized by gas which has been expanded through a regulator from higher pressure.
Be careful- this is true for nitrogen, but helium can actually get hotter when going through a regulator (helium is usually above its Joule-Thompson inversion temperature, 40 K).
(Of course, we have yet to operate in a flight regime that would experience any significant aerodynamic heat loads on ascent...)
True, and ERPS's vehicle layouts typically have the payload forward of the propellant tank, which would take the majority of aerodynamic heating anyway.
The best reply to such concerns is, "We should have such problems!"
Doug Jones
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