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- Newsgroups: sci.space
- Path: sparky!uunet!utcsri!utzoo!henry
- From: henry@zoo.toronto.edu (Henry Spencer)
- Subject: ground vs. flight
- Message-ID: <Bzopwn.MGC@zoo.toronto.edu>
- Date: Tue, 22 Dec 1992 23:43:34 GMT
- References: <ewright.724705324@convex.convex.com> <b-p254n@rpi.edu> <ewright.724956784@convex.convex.com> <zms23rp@rpi.edu>
- Organization: U of Toronto Zoology
- Lines: 31
-
- In article <zms23rp@rpi.edu> strider@clotho.acm.rpi.edu (Greg Moore) writes:
- > I can recall only 1 (possibly 2) examples of astronauts
- >transferring between craft via EVA. And in that case I believe
- >the craft were linked...
- > I don't doubt that someday we'll see EVA between
- >non-docked craft...
-
- "Someday" was 1966, on Gemini 10. And the target craft for the EVA wasn't
- even stabilized -- it was an old Agena, batteries long since dead. Apart
- from the problems of EVA itself, which NASA was only just starting to
- discover, it wasn't a problem according to Michael Collins (who did it).
-
- You might also want to look up the Solar Max retrieval (as originally
- planned), the Palapa/Westar retrieval, and the Leasat repair, all of
- which involved astronauts interacting with undocked craft. The Leasat
- repair, in particular, was done by the Intelsat method: slide the
- shuttle up close to the satellite and have an astronaut grab it (and
- Leasat was spinning, too).
-
- By the way, why do you assume the craft wouldn't be linked before crew
- or cargo transfer? It would make sense to at least have an arm linking
- them first.
-
- On-orbit operations are a little bit harder than on-ground operations,
- for two reasons: lack of friction, and the extra dimension of motion.
- On the ground, before you refuel (say) an aircraft, you make sure it's
- parked with its brakes locked. The equivalent in orbit is to grab hold
- of it with an arm. Still lots easier than for aircraft in flight.
- --
- "God willing... we shall return." | Henry Spencer @ U of Toronto Zoology
- -Gene Cernan, the Moon, Dec 1972 | henry@zoo.toronto.edu utzoo!henry
-