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    Re: Brown-Nassau CN Plotter or Spherical Computer
    From: Francis Upchurch
    Date: 2018 Dec 23, 03:16 -0800

    Hi Alan,

    I built a working home made replica a few years ago which works fine. Quicker than a calculator with practice. Usually accurate to 10'. Designed for easy quick aviation navigation.Not as accurate as the Bygrave but quicker and easier.

    Details attached.

    Best wishes and seasonal greetings.

    Francis

    File:
    BN-instructions.docx
    File:
    f2-Brown-Nassaubuild2.docx
    File:
    f1-Brown-Nassau-improved-accuracy.docx
    File:
    Luykx1998.docx
    File:
    f1-Luykx1998.pdf
       
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