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- Newsgroups: sci.space
- Path: sparky!uunet!hela.iti.org!aws
- From: aws@iti.org (Allen W. Sherzer)
- Subject: Re: Inflatable Space Stations - Why Not ?
- Message-ID: <1992Aug20.130545.18321@iti.org>
- Organization: Evil Geniuses for a Better Tomorrow
- References: <1992Aug19.183403.1527@gnv.ifas.ufl.edu> <1992Aug20.121234.17745@ists.ists.ca>
- Date: Thu, 20 Aug 1992 13:05:45 GMT
- Lines: 53
-
- In article <1992Aug20.121234.17745@ists.ists.ca> joseph@gkcl.ists (Joseph A. Beernink) writes:
-
- >>Whatever became of the idea of inflatable space habitats/workstations ?
-
- I don't think the idea is dead but rather that there just aren't any
- projects which need them. If and when SEI ever gets going we may see
- that change.
-
- >I was tossing this idea around last summer, and discussed with a few
- >physics and space science professors here at York U. There are a few
- >major problems, the way I understand it.
-
- >1. Many of the materials we would like to use, are 'biodegradable' in
- >space. They tend to be broken apart easily by radical oxygen and other
- >compounds floating about in LEO. Something like .1 - 3 cm thickness per
- >year for somethings. (Just off the top of my head)
-
- The LLNL Great Exploration design provides a coating of material which
- takes care of this problem. I can't remember what they use and I can't
- find my reference material but it is in the LLNL repsonces to the
- NASA critique of the Great Exploration.
-
- >at the upper limit of this decomposition, many structures would not
- >last ten years.
-
- The design life of the LLNL station is 10 years. This isn't a problem
- since they are cheap and we can always put up another.
-
- >2. Blowing up the 'balloon' in space means dealing with radical pressure
- >differences, trying to create an volume of gas in a vacuum, and expecting
- >to stay where you put it is not an easy task. Thus, the material would
- >probably have to be as strong as kevlar, or the like.
-
- The LLNL design does use Kevlar as well as other design features to
- deal with this problem.
-
- >3. The material would also have to be able to deal with the rapid
- >fluxuations in solar radiation.
-
- Can't address specifics on this one.
-
- >according to my professor friends, its just not possible now.
-
- the maker of all of NASA space suits since Apollo, ILC Dover, who also
- makes other large fabric aerospace structures doesn't agree. They studied
- the LLNL design and concluded that it was agressive but doable.
-
- Allen
- --
- +---------------------------------------------------------------------------+
- | Allen W. Sherzer | "If they can put a man on the Moon, why can't they |
- | aws@iti.org | put a man on the Moon?" |
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