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- From: kkobayas@husc8.harvard.edu (Ken Kobayashi)
- Newsgroups: sci.space
- Subject: Re: 2001/2010 Rocket Engines - What are they?
- Message-ID: <kkobayas.727831962@husc.harvard.edu>
- Date: 23 Jan 93 23:32:42 GMT
- References: <1993Jan21.102943.5124@abo.fi> <1993Jan21.120247.11867@abo.fi>
- <1993Jan21.110438.1@fnalf.fnal.gov> <1993Jan22.201809.156515@zeus.calpoly.edu>
- Lines: 13
- Nntp-Posting-Host: husc8.harvard.edu
-
- jgreen@zeus.calpoly.edu (James Thomas Green) writes:
-
- >I seem to recall that the reaction fluid was liquid NH3. I
- >would imagine that it would disassociate under that kind of
- >temperature and get the extra boost that H ions would give.
-
- I believe the Discovery used both - H2 and NH3. H2 for the initial
- boost, stored in expendable tanks, and NH3 for braking and return. Or
- just braking, actually - in the book there was no fuel aboard the
- Discovery for a return trip. Anyway, the book said that the combination
- was used because H2 would give maximum performance for initial boost, and
- NH3 is easier to store until the braking stage. Correct me if I'm wrong -
- I haven't read it in a while and I don't have it handy.
-