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- Newsgroups: sci.space
- Path: sparky!uunet!think.com!rpi!clotho.acm.rpi.edu!strider
- From: strider@clotho.acm.rpi.edu (Greg Moore)
- Subject: Re: DC vs Shuttle capabilities
- Message-ID: <9ls2_fp@rpi.edu>
- Nntp-Posting-Host: acm.rpi.edu
- Organization: The Voice of Fate
- References: <ewright.724705324@convex.convex.com> <b-p254n@rpi.edu> <BzHH37.9r5@zoo.toronto.edu>
- Date: Tue, 22 Dec 1992 06:31:51 GMT
- Lines: 38
-
- In article <BzHH37.9r5@zoo.toronto.edu> henry@zoo.toronto.edu (Henry Spencer) writes:
- >In article <b-p254n@rpi.edu> strider@clotho.acm.rpi.edu (Greg Moore) writes:
- >> Umm, so? Tell me, did you see 3 aircraft landing at the same
- >>time, or flying in formation? Did you see baggage transferred between
- >>them while in flight? I'm not talking about on the ground, I'm talking
- >>about in space...
- >
- >Why do you assume that "in the air" is a better analogy for "in space"
- >than "on the ground" is? Flying aircraft in close proximity is vastly
- >harder than doing the same for spacecraft, because of the complex and
- >unpredictable behavior of the atmosphere. In-orbit operations resemble
- >on-ground operations more than in-flight operations: the environment
- >is simple and predictable and you can take your time.
- >--
- I make the analogy for two reasons. One as you point out may be
- invalid.
- Let's handle baggage transfer. On the ground, you have gravity
- and the surface. You can walk/carry/drive between two planes. In
- air, you have to somehow manevour. As you point out, the air itself
- makes this tricky. But in space, you don't have something nice like
- the ground to use. So, the astronauts have to use MMU's or make
- blind leaps between the three crafts.
-
- As for manevouring the 3 craft in close proximity, I partly
- agree with you. It is easier than doing it in the air. However,
- you do have three craft now all with somewhat different velocity
- vectors. I believe that the Intelsat rescue was the first time
- both bodies were active in terms of maneuvering.
-
- I'm not saying it can't be done, or that it won't be done.
- Simply that some thought and PRACTICE will have to go into it.
-
- Perhaps sea operations are a better example. But I don't think
- so.
- >"God willing... we shall return." | Henry Spencer @ U of Toronto Zoology
- > -Gene Cernan, the Moon, Dec 1972 | henry@zoo.toronto.edu utzoo!henry
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