NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Temperature range of bubble sextants?
From: Tony Oz
Date: 2017 Jan 16, 08:39 -0800
From: Tony Oz
Date: 2017 Jan 16, 08:39 -0800
Hello and Happy New Year!
I have a liquid-filled compass that has a tiny crack in its' bulb - therefore there is no excessive pressure of the liquid inside the bulb any more.
Each time I take this compass outdoors in winter - there appears a bubble in the bulb. The colder is the weather - the bigger the bubble. At a room temperature the bubble disappears again.
My question is:
- how do they stabilise the bubble size in a sextant through an ambient temperature range?
- how wide is that range?
Warm regards,
Tony
