NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Ebay kollsman periscope sextants
From: Paul Dolkas
Date: 2018 Jun 7, 10:03 -0700
From: Paul Dolkas
Date: 2018 Jun 7, 10:03 -0700
Noel-
Huh. I guess a little “stiction” goes a long way. I wonder if a drop of mercury in oil would suffer the same effect. Any physicists (or somebody with some mercury) have an opinion?
Paul Dolkas
From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Noell Wilson
Sent: Thursday, June 07, 2018 8:16 AM
To: paul@dolkas.net
Subject: [NavList] Re: Ebay kollsman periscope sextants
Hi Paul,
I tried the BB/ball bearing level several years ago and it didn’t work. As someone pointed out, there’s microscopic resistance to getting the ball rolling.
http://fer3.com/arc/m2.aspx/How-not-level-an-AH-Wilson-jan-2014-g26645
Regards, Noell
