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    Re: Re Re: Dream Choice of Sextant
    From: Alexandre Eremenko
    Date: 2005 Aug 12, 17:12 -0500

    Jared,
    I did not understand from this exchange,
    what exactly is the advantage of titanium as
    a material for a sextant frame.
    
    I understand its advantages as a material for eyeglass
    frame: it is stronger than steel of the same weight.
    But what can happen to a sextant frame, why should it be
    so terribly strong? You are not going to drop your dream
    sextant on a concrete floor. And even if you do, it is much likely
    that you destroy the mirrors and the telescope, but not the frame.
    
    Simply speaking, don't you think that a brass or aluminium frame
    of modern sextants is already strong enough?
    
    Alex.
    
    On Fri, 12 Aug 2005, Jared Sherman wrote:
    
    > Until the breakup of the USSR most titanium was terribly expensive.
    > IIRC they controlled the largest production sources? And it was
    > considered a strategic defense resource by all parties. Now, it is
    > simply
    > expensive--and still terribly expensive to work. If the properties are
    > right it might make a dream sextant but the kind we'd only see offered
    > in the Nieman Marcus Christmas Catalog.
    
    
    

       
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