Re: Progress Undocking

From: Mir16609@aol.com
Date: Wed Nov 01 2000 - 13:43:10 PST

  • Next message: Gordon.Briggs@agso.gov.au: "Buran"

    In a message dated Wed, 1 Nov 2000  4:11:26 PM Eastern Standard Time, 
    Jonathan T Wojack <tlj18@juno.com> writes:
    
    <<I know it can't be cheap to
    manufacture.  But I don't think it has the capability of re-entering
    without destroying itself, which gives it negative value when unloaded
    and docked to the ISS.  I would think that making a "two-way" Progress
    supply ship would be cheaper than making dozens of them in the long run. >>
    
    The ISS will get a steady diet of Progress dockings and Shuttle visits during 
    the Expedition 1 mission.   The Progress also serves as a waste disposal 
    system - just as it was on the Mir.   Otherwise OIG would be cataloging 
    number 1,000,000 just from the internal junk generated on 14 years of Mir 
    occupation.  The Progress get filed with the junk and then get deorbited into 
    the Pacific. That is part of its mission.
    
    The cheapest way to get supplies to the ISS is via an unmanned Progress 
    mission.  An unmanned mission allows you to lose the weight and volume warm 
    bodies and of a life-support systems and replace it with needed supplies. 
    Tang gets very expensive if you need a $250 million shuttle mission just to 
    get it to the ISS.
    
    This is why a US-Russian team makes sense.  The 2 programs are complementary.
    
    Cheers,
    Don Gardner  39.1799 N, 76.8406 W, 100m ASL
    http://hometown.aol.com/mir16609/
    
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