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    Re: A simpler Bygrave ? - corr.
    From: Hanno Ix
    Date: 2010 Feb 6, 08:08 -0800
    There is an error in below equation.

    I wrote:  n(x) = logn(cosec(x))  for x=1...89;

    It should be: n(x) = logn(cosec(x))  for x=(1...89)*PI/180;

    H

    From: Hanno Ix <hannoix---.net>
    To: NavList@fer3.com
    Sent: Fri, February 5, 2010 4:43:47 PM
    Subject: [NavList] A simpler Bygrave ?


    Ageton's method can be, mathematically at least, performed with a single scale,  log cosec or log sec.

    Therefore, it should be possible to create a version of the Bygrave that contains just a single scale of cosec or sec.
    For convenience, one could add one or more cursors as convenient.

    Note:  The CelNav on Starpath's Emergency Navigation Card can be reduced to this method. 
    Just compare their N(x) Table with :  

    I can see certain mechanical advantages of a one-scale Bygrave. I am sure this has occurred to somebody else long ago, too.

    Therefore I ask why, despite its seeming simplicity, such a version has never been implemented.

    Regards




       
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