home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.space
- Path: sparky!uunet!convex!darwin.sura.net!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!news.sei.cmu.edu!fs7.ece.cmu.edu!crabapple.srv.cs.cmu.edu!roberts@cmr.ncsl.nist.gov
- From: roberts@cmr.ncsl.nist.gov (John Roberts)
- Subject: Re: Low-pressure O2 atmosphere
- Message-ID: <BxJB55.KC2.1@cs.cmu.edu>
- X-Added: Forwarded by Space Digest
- Sender: news+@cs.cmu.edu
- Organization: National Institute of Standards and Technology formerly National Bureau of Standards
- Original-Sender: isu@VACATION.VENARI.CS.CMU.EDU
- Distribution: sci
- Date: Wed, 11 Nov 1992 04:28:36 GMT
- Approved: bboard-news_gateway
- Lines: 30
-
-
- -From: flb@flb.optiplan.fi ("F.Baube x554")
- -Subject: Low-Pressure O2 Atmosphere
- -Date: 10 Nov 92 13:11:49 GMT
-
- -If our lunar atmosphere is pure O2, then every dust cloud
- -kicked up by a lunar buggy creates an explosion hazard.
- -It will have to be "diluted".
-
- One of the concerns of the Apollo program was that lunar materials might
- ignite in the oxygen atmosphere of the Lunar Module. Apparently it didn't
- happen. It could be that most of the materials are too thoroughly oxidized
- to be particularly flammable. The book I mentioned gives average soil (< 1 mm
- fraction) for seven Apollo sites, which generally show concentrations of
- the components to be consistent to within an order of magnitude (mostly closer
- than that.) Here's the composition for the Apollo 11 site: SiO2 (42.04%),
- TiO2 (7.48%), Al2O3 (13.92%), FeO (15.74%), MgO (7.90%), CaO (12.01%),
- Na2O (0.44%), K2O (0.14%), P2O5 (0.12%), MnO (0.21%), Cr2O3 (0.30%).
- (There are also tables for overall highland and maria composition.) Does
- anything in there sound like it would be flammable in the stated
- concentrations?
-
- -Can nitrogen be generated ?
-
- There's very little nitrogen there (0.19 ppm) - it would probably have to be
- imported. But I think that would be worthwhile.
-
- John Roberts
- roberts@cmr.ncsl.nist.gov
-
-