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- Newsgroups: sci.space
- Path: sparky!uunet!cs.utexas.edu!torn!newshub.ccs.yorku.ca!ists!gkcl!joseph
- From: joseph@gkcl.ists.ca (Joseph A. Beernink)
- Subject: Re: Inflatable Space Stations - Why Not ?
- Message-ID: <1992Aug20.121234.17745@ists.ists.ca>
- Sender: news@ists.ists.ca (News Subsystem)
- Reply-To: joseph@gkcl.ists (Joseph A. Beernink)
- Organization: York University, Toronto, Ontario
- References: <1992Aug19.183403.1527@gnv.ifas.ufl.edu>
- Date: Thu, 20 Aug 92 12:12:34 GMT
- Lines: 52
-
- In article <1992Aug19.183403.1527@gnv.ifas.ufl.edu> jrm@gnv.ifas.ufl.edu writes:
- >Whatever became of the idea of inflatable space habitats/workstations ?
- >The savings on initial cost and on launch weight should be very great.
- >Add to that the large size and configurational possibilities and you
- >have an incredibly good deal. Modern materials, esp tri-weave carbon
- >fiber, could strengthen an envelope and protect against ripping or
- >bursting. All you need is a docking hatch and a few hard points to attach
- >odds and ends to. The rest is just hot air. Internal partitions and
- >compartments would be easy to build into such a structure ... or glue in
- >later on. The large internal free volume of air would also add safety
- >against explosive decompression. Self-sealing layers could deal with
- >micrometeorites. If desired, thin interlocking plates of metal could be
- >attached to the envelope to armor the whole thing.
- >
- >What's the problem ? Is this perhaps a TOO CHEAP solution - meaning that
- >the contractors couldn't steal enough money during development ? If we
- >want nice BIG space stations, with loads of internal room, with easy
- >expandability ... inflatable spheres sound like the economical solution.
- >Any feedback on this ?
- >
- >-- Jim Mason
-
- 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) Needless to say,
- at the upper limit of this decomposition, many structures would not
- last ten years.
-
- 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.
-
- 3. The material would also have to be able to deal with the rapid
- fluxuations in solar radiation.
-
- Now don't get be wrong. I am by no means an expert on any of this. (As
- certain people on the net will be quick to point out), and I would
- love to see this get started (hell I'd love to work on it), but
- according to my professor friends, its just not possible now. But
- maybe things have changed. I know they pulled down a satellite carrying
- materials research projects, but I have heard too much about that.
- If someone who has heard could post the news, I'm sure many people would
- be appreciative.
- ------------------------------------------------------------------
- Joseph A. Beernink | "Failure isn't a reason to quit...
- joseph@gkcl.ists.ca | it's a reason to try harder." me
- cs921031@dialup.ariel.yorku.ca | (416) 739 1975 - York U. Toronto, Ont.
-