NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: A-12 Bubble sextant
From: hellos
Date: 2006 Jun 1, 08:18 -0500
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From: hellos
Date: 2006 Jun 1, 08:18 -0500
Ken, do you think that deep freezing the sextant
would harm it?
Placing metal objects in a deep freeze (at the
local ice cream shop, etc.) and letting them cold soak for a full day often
contracts metal parts enough so that they will unstick. Thermal cycling it,
repeating the freeze/thaw two or three times, also breaks corrosion. (Home
referigerator freezers usually don't get that cold.)
I've done this with deep freeze, and also with a
dry ice and alcohol mix (applied locally) and stuck things get unstuck very
nicely. The cold shouldn't hurt anything, it is nowhere near the shattering
effect of liquid nitrogen.<G>
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