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    Re: Bygraves
    From: Brad Morris
    Date: 2009 Jul 16, 15:50 -0400

    Hi Hanno Ix


    I don’t think we will ever be done with this discussion.  The Bygrave and its direct descendants will remain a fascination for some, like me!


    Others are bored to tears.   For heaven’s sake, it is just a pair of cosine, cotangent scales.  {Or secant, tangent scales, depending on your persuasion. }


    The conversation on a consortium re-manufacture of a Bygrave like slide rule has foundered on exactly what to manufacture.  Some, like me, would like a reproduction of the MHR-1, which is IMHO, the class act of them all.  Others would like to produce much cheaper models, using common materials. 


    I would love to extend the scales to angles less that 20’ and above 89deg40’ on the scales.  This would require far longer scales, something that the MHR-2 attempts but does not succeed at.  I have provided some study to how long the scale would have to be.


    Secondly, I would like to explore Bygrave’s patent statement that a second set of scales can be used around 0 and 90 degrees.  I have an idea in mind how to do that, but it is not yet formalized for realization.


    Perhaps there is some area you wish to explore?


    Best Regards








    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Hanno Ix
    Sent: Thursday, July 16, 2009 2:09 PM
    To: NavList@fer3.com
    Subject: [NavList 9114] Bygraves



    I have not seen any postings to this topic lately. Are we done for now with the discussions, or am I missing something here...




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