[AR] Re: Rocket thrust change with altitude, RPA

  • From: Henry Spencer <hspencer@xxxxxxxxxxxxx>
  • To: Arocket List <arocket@xxxxxxxxxxxxx>
  • Date: Mon, 7 Nov 2016 00:14:41 -0500 (EST)

On Sat, 29 Oct 2016, I wrote:

There's been at least one small experimental LOX/LH2 in-space maneuvering
engine -- with a *very* long nozzle and an Isp in the 480s -- that had
significant condensation in its exhaust...
Do you have more information on this engine? Name? References I can read?

"I'll give you a conditional 'maybe' on that." :-)

Nope, alas, I draw a blank on it. Nothing on it in my files -- as I said, it was a paper (?) I noticed in passing and wasn't particularly interested in -- and a quick Google search or two didn't turn up anything either. It was US work, I think, and you wouldn't think there were very many small ultra-high-expansion LOX/LH2 maneuvering engines, even just in the lab, so a determined search might well turn it up.

Henry

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