home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.space
- Path: sparky!uunet!gatech!rpi!clotho.acm.rpi.edu!strider
- From: strider@clotho.acm.rpi.edu (Greg Moore)
- Subject: Re: ground vs. flight
- Message-ID: <=hv29vp@rpi.edu>
- Nntp-Posting-Host: acm.rpi.edu
- Organization: The Voice of Fate
- References: <Bzopwn.MGC@zoo.toronto.edu> <1jt2zfd@rpi.edu> <BzqKKM.LJ3@zoo.toronto.edu>
- Date: Thu, 24 Dec 1992 04:14:52 GMT
- Lines: 56
-
- In article <BzqKKM.LJ3@zoo.toronto.edu> henry@zoo.toronto.edu (Henry Spencer) writes:
- >In article <1jt2zfd@rpi.edu> strider@clotho.acm.rpi.edu (Greg Moore) writes:
- >> I wasn't aware of this. What did Michael Collins do while on
- >>the Agena?
- >
- >Apart from just generally evaluating how easy it was to do -- not very --
- >he retrieved a micrometeorite experiment package that had been put on
- >the Agena in hopes that it could be returned to Earth eventually.
- >
- Actually Henry, that supports my original point, that EVA to and
- on and unstabilized platform isn't easy.
- However, I do find that this was sone very interesting. Any
- idea how much if any tumbling the Agena was doing?
-
- >> ... what is
- >>the maximum mass that the RMS can handle?
- >
- >I think it's rated for the theoretical maximum shuttle payload, 65klbs.
- >It's not rated for the full mass of an orbiter, which is why the station
- >arm will eventually take over the capture-for-docking job.
- >
- I meant to ask about this earlier. I thought at one point I
- saw a diagram for a special "arm" to do this, basically something that
- could pull in and out, and may wiggle the end a bit. Was this just
- a mistake? or was this dropped.
-
- Also, given that the bottom of the shuttle is covered with
- tile, can the orbiter exert a Y+ (i.e. vertically up) translation?
- This is something that I've always wondered.
-
- >> BTW, what has the success rate been with the RMS on grabbing
- >>stuff with a handle? Anyone have any clue? 80% 90%? Let's
- >>not even consider the stuff it's had to attempt to grab that didn
- >>have handles...
- >
- >The arm really *can't* grab anything that doesn't have a proper grapple
- >fixture on it, because the "hand" isn't a general-purpose gripper -- it's
- >designed solely and only to grab grapple fixtures, and is very specialized
- >for exactly that job.
- >
- Hmm, I'd have to look over what I was thinking of. I'm aware
- of the design on the end effector, so I should have thought about the
- question better. :-)
-
- >As far as I know, the success rate for grapple fixtures is 100%. They've
- >sometimes had to proceed slowly and carefully, but I don't think they've
- >ever had to abandon a grabbing attempt.
-
- Didn't they ahve to manually slow down a rotating satellite
- since the arm couldn't grapple the fixture fast enough? (Solar Max?)
-
- >--
- >"God willing... we shall return." | Henry Spencer @ U of Toronto Zoology
- > -Gene Cernan, the Moon, Dec 1972 | henry@zoo.toronto.edu utzoo!henry
-
-
-