• Separating segments of ISS

    From JF Mezei@21:1/5 to All on Fri Mar 18 21:04:21 2022
    Theoretical question.

    Say Russia went bezerk and decided to unilaterally de-orbit the station,
    and gave USA limited warning. (and assuming Russia could re-orient
    station such that its Porgress woudl be able to slow down station).

    Would the quickest disconnect be between Zaria and PMA1, or the CBM
    attachment of PMA1 to Unity? (I assume CBM is more likely to still be
    working since they would add more recent CBM motors ?)

    Between US and Russian segments, are there only electrical/data
    connections or are there also some ammonia for cooling?

    Say PMA1 is split from CBM hatch on Unity, leaving external electrical connections. Would Canadarm have enough power to push Zarya away and
    force electrical cables to snap? (Or could DEXTRE be used to sever
    those cables, or absolutely require EVA? )


    Assuming separation had been accomplished, would CMGs automatically
    adapt to new centre of gravity, need new parameters, or would their
    location at one end of station make they almost useless for attitude
    control?


    Assuming for a minute that Alenia built another MPLM and that SpaceX
    would fit in tanks and engines for reboost and it is mated to aft hatch
    on Unity. Works fine and dandy, how how would it be refueled?

    In the early days of ISS when they were planning on a US reboost module,
    had they worked out how it would be refueled?

    With today's tech, would a reboost engine still be hydrazine, or would
    SpaceX pitch methane/LOX engines ?

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