[AR] chilled propane (was Re: SSTO)
- From: Henry Spencer <hspencer@xxxxxxxxxxxxx>
- To: Arocket List <arocket@xxxxxxxxxxxxx>
- Date: Wed, 14 Feb 2018 12:51:22 -0500 (EST)
On Wed, 14 Feb 2018, George William Herbert wrote:
I note that the gap between the boiling point of LOX and the melting
point of propane is quite narrow, less than 5 degrees C. Does this
cause any problems in practice? It certainly would mean you couldn't
use subcooled LOX for increased density.
Or limit the cold inflow a bit and if necessary a bit of heater at the
base of the propane tank to ensure it can be warmed if it freezes...
Although it's nice if the two tanks can be at the same temperature,
maintaining a *small* temperature difference is a lot less hassle than a
large one.
(And you wouldn't want to use a common bulkhead in any case -- propane and
LOX are not fully miscible at modest pressures, but apparently they are
miscible *enough* to form a dangerous mixture.)
Henry
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