Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site sdcc6.UUCP Path: utzoo!linus!philabs!cmcl2!seismo!harvard!talcott!panda!genrad!decvax!ittatc!dcdwest!sdcsvax!sdcc3!sdcc6!ix241 From: ix241@sdcc6.UUCP (ix241) Newsgroups: net.sci,net.space Subject: Re: Re: Would a candle burn ... Message-ID: <2174@sdcc6.UUCP> Date: Tue, 6-Aug-85 10:58:29 EDT Article-I.D.: sdcc6.2174 Posted: Tue Aug 6 10:58:29 1985 Date-Received: Sat, 10-Aug-85 22:09:57 EDT References: <53@ssc-vax.UUCP> <1206@sjuvax.UUCP> <1816@aecom.UUCP> <3429@utah-cs.UUCP> Distribution: net Organization: U.C. San Diego, Academic Computer Center Lines: 13 Xref: linus net.sci:137 net.space:2922 Summary: .2 atm O2 then; earth normal now During Apollo and earlier missions NASA always used a reduced pressure pure oxygen enviroment on missions. They used full pressure O2 for many ground tests until the disaster of Apollo 1. Currently an Earth normal atmosphere is used in the Shuttle. That is the reason space walkers have to prebreathe. The suits use the 4PSI pure O2 that was used in the older missions. The main reason for the reduced pressure, however is to make the suits easier to operate. Less work against pressure. John Testa UCSD Chemistry sdcsvax!sdcc6!ix241