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    Re: A simpler Bygrave ?
    From: Wolfgang Hasper
    Date: 2010 Feb 8, 19:38 +0100

    Hi Hanno,
    this sound intersting.
    Making things as simple as possible is alsways a
    challenge. I have not yet been able to fully
    understand your suggestion.
    Maybe you could describe in in a little more detail?
    Am Montag, 8. Februar 2010 15:12 schrieb Brad Morris:
    > Hi Hanno
    > You may be on to something.
    > May I suggest that you construct one and solve some
    > navigation triangles using it.
    > This will help us to understand your concept and way
    > forward.
    > Best Regards
    > Brad
    > From: navlist-bounce@fer3.com
    > [mailto:navlist-bounce@fer3.com] On Behalf Of
    > Hanno Ix Sent: Sunday, February 07, 2010 5:44 PM
    > To: NavList@fer3.com
    > Subject: [NavList] Re: A simpler Bygrave ?
    > Gentlemen:
    > So far I have not received any answers why a single
    > scale Bygrave  never has been implemented. I suspect
    > it has to do with the use of such a thing, however,
    > it is not clear to me. However, I am no sailor.
    > There must be some of you so knowledgeable in CelNav
    > who have an opinion. Please, just drop me a note.
    > Regards
    > H
    > PS, again: in the formulae below  x=1...89; should
    > be replaced by x=(1:89)/180*PI
    > ________________________________
    > From: Hanno Ix 
    > To: NavList@fer3.com
    > Sent: Fri, February 5, 2010 4:43:47 PM
    > Subject: 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 :   n(x) = logn(cosec(x))  for
    > x=1...89;
    > 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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