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From: brent@phoenix.UUCP (Brent P. Callaghan)
Newsgroups: net.sci,net.space
Subject: Re: Shuttle atmosphere
Message-ID: <1253@phoenix.UUCP>
Date: Wed, 31-Jul-85 10:04:05 EDT
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Posted: Wed Jul 31 10:04:05 1985
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Xref: watmath net.sci:396 net.space:4360

>The current space program uses a 100% O2 atmosphere.  If you lit a
>flame in such an atmosphere, would all the dust and other random
>particles ignite in the presence of the flame?

Correction:  The space shuttle uses a nitrogen/oxygen mixture
at only slightly reduced pressure.  The Soviets have always
used nitrogen/oxygen at 15 psi.

For an EVA, the shuttle pressure suits supply 100% O2 at greatly
reduced pressure.  Mission specialists prepare for an EVA by
pre-breathing pure oxygen to purge nitrogen from their bodies.
and avoid the bends.
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