NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Bris Sextant
From: John Rae
Date: 2005 Oct 31, 13:43 -0800
From: John Rae
Date: 2005 Oct 31, 13:43 -0800
Dear Alex
The dimensions that would be useful to me would
allow me to compute the actual physical angles between the small pieces of
glass. By looking sideways at the instrument, ther will be two triangles
with the apex at the bottom where all three touch, and two gaps at the
top. If I knew the vertical distance represented by the length of glass,
and the gap at the top between the three glasses (two measurements) then I can
compute the angles between the glasses, assuming the tangent and sine of small
angles is approximately the same.
Using this calculated angle (or angles) I can then
adjust my test instrument for further trials to simulate the instrument you
have. I thank you for the information.
