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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Correction to measuring Octant instrument error
From: Bill Murdoch
Date: 2000 Sep 21, 8:18 PM
From: Bill Murdoch
Date: 2000 Sep 21, 8:18 PM
In a message dated 9/21/00 4:23:07 PM Eastern Daylight Time, george@HUXTABLE.U-NET.COM writes: > I do hope that Bill appreciates all the attention that his proposal is > receiving. Whether or not he thinks the advice he is getting is appropriate > to his plans, he has raised some intriguing general questions. I do very much appreciate it. (And, it is a path I don't think the group has been down before.) While I have been quietly reading the posts, I have also been reading the "Wood Handbook" which has data for the thermal and moisture expansion coefficients of different species of wood. Interestingly, wood has a lower thermal expansion coefficient in the longitudinal direction than plastics, aluminum, or brass and has little moisture expansion in the longitudinal direction. In addition, if hotter is dryer they may cancel each other out. Bill Murdoch
