A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Date: 2017 Jul 19, 06:34 -0700
I tried using a new chromed ball bearing to indicate level on a mirror artificial horizon (AH). The plan was that one simple steel ball on the mirror could substitute for a precision level and, when the ball stopped rolling, the mirror would be perfectly level.
It didn't work.
Dust or stiction or something kept the ball from rolling until the mirror was tilted way out of level.
I don't think your curved tube with a steel ball and proximity switches is going to be very accurate.