[AR] Re: SpaceX (was Re: arocket Digest V4 #217)
- From: Henry Spencer <hspencer@xxxxxxxxxxxxx>
- To: Arocket List <arocket@xxxxxxxxxxxxx>
- Date: Sun, 11 Sep 2016 16:36:34 -0400 (EDT)
On Sun, 11 Sep 2016, Keith Henson wrote:
I wonder what the loading sequence is? The thermal stress would be
awful on a sphere where half was a room temperature and the other half
was at LOX temp.
The usual sequence for helium bottles inside cryo tanks is to load the
helium last and unload it first. Most materials get stronger at low
temperatures, and of course gases are denser when cold, so you can get a
lot more helium in if you fill cold bottles with cold helium.
Henry
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