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Re^10: "Practices and Principles" to death

by Gavin (Chancellor)
on Mar 04, 2008 at 11:40 UTC ( #671849=note: print w/replies, xml ) Need Help??


in reply to Re^9: "Practices and Principles" to death
in thread "Practices and Principles" to death

Do you think the arm or deflector could be manoeuvred with sufficient accuracy by remote from earth to obtain the desired effect?
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Re^11: "Practices and Principles" to death
by BrowserUk (Pope) on Mar 04, 2008 at 12:38 UTC

    Truthfully, I've no idea, but I wasn't thinking about manoeuvering either (except maybe rotating the deflector to be at right angles to the debris path). Just the entire assemble, shuttle'n'all. And I'm not at all sure that the shuttles are capable of remote operations either, though if they're not, they could be made so--for some amount of money.

    They already track the debris pretty accurately and can predict their future course sufficient that they can avoid them when planning shuttle launches and manoeuvers, though they probably use wide margins of safety. And they have to be able to position the shuttle pretty accurately for docking, so I don't think control is a problem.

    If you imagine the deflector being a 3 cm thick titanium plate that is elliptical, and as large as can fit in the shuttle bay--say 15ft on the minor axis and 30ft on the major, for a weight of about 4 tonnes.

    If presented to the debris at a 30deg angle to its path--you have a 15ft diameter target. Many times the tolorance for docking. With military spec GPS guidance that should be possible. It really comes down how accurately the debris trajectories are known.

    I think the really major part of such an operation would be planning minimal maneouvering of the shuttle to allow it to intercept the maximum number of pieces without wasting fuel. The shuttle wouldn't have to chase after the debris. Just be in the right place as it comes by.

    The bit I really have no feel for is whether, say a camera hitting the plate would cause all the bits to predictably directed in the desired direction, or whether you'd end up with a dozen more pieces of debris on new paths?


    Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
    "Science is about questioning the status quo. Questioning authority".
    In the absence of evidence, opinion is indistinguishable from prejudice.
      Perhaps there's an opening for a Tractor Beam
      or some method of magnetising the deflector shield to attract and collect the space debris as it passes by.
        or some method of magnetising the deflector

        Trouble is, most of the debris isn't magnetic. Mostly aluminum, titanium, carbon-carbon etc. Weight == cost and steel has no advantages.


        Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
        "Science is about questioning the status quo. Questioning authority".
        In the absence of evidence, opinion is indistinguishable from prejudice.

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[Corion]: But I have a very positive experience with a four day workweek and a three day weekend. I can't easily go back though to full money.
[Corion]: That is easy without having to pay for a house, a wife or children though. If I had any of these, or any two of these, the decision wouldn't be that easy.
[ambrus]: wait. I understand no wife and children, but how do you not have to pay for a house?
[hippo]: I had a low-paid job about 20 years ago and seriously considered going down to a 3-day week. Would have worked 60% of the time for about 80% of the cash.
[Corion]: ambrus: Well, I pay rent, but don't own a house with variable/ unforeseeable costs
[hippo]: The thesholds/benefits balance at the time was nuts.
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[Corion]: hippo: Yeah, if you still get enough money to get by and don't have expensive hobbies or other fixed costs that can work out well
[ambrus]: ah good. I pay only rent too. but that still costs significant money.
[Corion]: ambrus: Yes, but that is already budgeted for

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