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Re: Selection of slide rules, compendium of messages
From: Gary LaPook
Date: 2011 Nov 26, 00:44 0800
From: Gary LaPook
Date: 2011 Nov 26, 00:44 0800
Here is a link to a previous posting going step by step solving the same problem using the sinecosine method. The Hc found in 71° 06', a difference of 11.4'. http://www.fer3.com/arc/m2.aspx?i=108339&y=200905 http://www.fer3.com/arc/m2.aspx?i=108365&y=200905 And here is a step by step procedure using the Bygrave formulas. http://www.fer3.com/arc/m2.aspx?i=108342&y=200905 A simulation of solving for Hc using a 10 inch slide rule and the sinecosine formulas is here: http://www.fer3.com/arc/m2.aspx?i=108658&y=200906 The results are much worse than when using the Bygrave formulas as shown by the same type of simulation reported here: http://www.fer3.com/arc/m2.aspx?i=108985&y=200907 You can download a manual for the K&E 4080 http://www.mccoyskecatalogs.com/KEManuals/40803_1948/40803_1948.htm gl  On Fri, 11/25/11, Gary LaPook <garylapook@pacbell.net> wrote:
