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    Re: Traditional navigation by slide rule
    From: Brad Morris
    Date: 2016 Jan 20, 15:56 -0500

    Hi Francis

    I don't mean to be pedantic or otherwise review what you already know.  But here goes anyway!

    The scales must be logarithmic for the multiplication to work.  Just having some sine or cosine scale will not work unless it is also logarithmic. 

    But you already knew that ;-)

    Brad



    On Jan 20, 2016 3:16 PM, "Francis Upchurch" <NoReply_Upchurch@fer3.com> wrote:

    Thanks Brad,

    Yes, I thought you meant that. Good ah ha idea. Like all these, obvious to mere mortals like me once you show us the light! (now why didn’t I think of that? Thought the same years ago about monoclonal antibodies. I did actually think of that, but that sneaky Nobel Laureate got there first!).0

     I’ll test run a transparency cos scale over the top of the current cos and sine scale on my big Fuller 2 and see how it goes. The current layout allows multiplication and division of sines and cosines. But indirectly via the A (or is it C or D) regular scale, which involves several extra moves. More asap.

    Francis

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