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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Making an artificial horizon, and leveling thereof
From: Henry Halboth
Date: 2011 Jan 24, 13:00 -0800
From: Henry Halboth
Date: 2011 Jan 24, 13:00 -0800
George, You are, of course aware that this subject was rather exhaustively explored on this List some time ago, proving the old adage to the effect that ... "what goes around, comes around". It is my recollection that the consensus of opinion at that time favored a screw leveled dark colored glass or Plexiglas ah, assuming that sufficiently accurate spirit levels could be obtained - as I recall, several excellent designs were appended to posts then submitted. This was, of course, intended as a substitute for the liquid, or mercury, ah both of which appear superior to any leveled reflective surface device. I recall posting at the time the significant, though not insurmountable, problem of keeping the centers of buoyancy and gravity aligned exactly both transversely and longitudinally in a floating arrangement of composite construction, so as to insure perfect equilibrium of floatation. It does seem rather extraneous to me to float a reflective device when the medium of floatation itself provides an adequate horizontal reflective surface to begin with. I have searched in vain to find these postings. Regards, Henry --- On Sat, 1/22/11, George Huxtable <george@hux.me.uk> wrote:
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