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Re: Freiberger Trommelsextant errors
From: Wolfgang Hasper
Date: 2012 Apr 16, 18:49 +0200
From: Wolfgang Hasper
Date: 2012 Apr 16, 18:49 +0200
Less obviously, if the axis of the index arm is not at right angles to the plane of the rack or scale, a somewhat similar error will appear. See the post for 20 March 2011 "C Plath Sextant Lives Again" at www. sextantbook.com
In my case I do not think this source is likely, given the cylindrical index arm bearing of the Freiberger.
I guess it is plainly eccentricity due to the reasons Bill gave, poor workmanship essentially.
And I am pretty sure FPM earn their money not with enthusiasts but with the professional sextant requirement in commercial shipping.
Errors do not matter much there as the instruments are not used anyway.
Wolfgang
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