NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Temperature range of bubble sextants?
From: David Pike
Date: 2017 Jan 17, 11:30 -0800
From: David Pike
Date: 2017 Jan 17, 11:30 -0800
I once saw a drawing of a compass for an airplane - there was all the machnery for compensation of fluid effects from different temperatures and pressures.
Tony. The older flat aircraft magnetic compasses tended to have a concertina-like brass bottom to the bowl to allow the fluid to expand and contract. The vertical dashboard types often have a neoprene film sandwiched between the case and a domed rear plate. DaveP
