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See today's response on   Bygrave formula accuracy on 10 inch slide
rule  thread.

gl

On Jul 5, 10:49�pm, Gary LaPook  wrote:
> My experience with the accuracy of the models I made is that it is
> consistently within two minutes of arc and most often within one minute.
> This is consistent with what others have written about the instrument,
> including Bowditch, article 2121. So the error doesn't exceed 2 nautical
> miles, 2.3 sm.
>
> There are some rare special cases that require a slight change in
> procedure but when the special procedures are followed the accuracy of
> the computed altitude remains within 2 minutes of arc. See instructions at:
>
> http://www.fer3.com/arc/img/108719.revised%20form%206-18-09.pdf
>
> Regarding accuracy see the attached documents and:
>
> http://www.fer3.com/arc/img/106329.bygrave%20pages%20from%20naca-repo...
>
> http://fer3.com/arc/m2.aspx?i=107947&y=200904
>
> http://www.fer3.com/arc/img/106329.bygrave%20manual.pdf
>
> http://www.fer3.com/arc/img/106329.imgp5241.jpg
>
> gl
>
> �weems-bygravee.pdf
> 1304KViewDownload
>
> �LykxxBygrave.pdf
> 317KViewDownload
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