NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: A-10 Sextant Maintenance Manual
From: Thomas Kleemann
Date: 2007 Dec 13, 21:04 +0100
From: Thomas Kleemann
Date: 2007 Dec 13, 21:04 +0100
Hello, I've got no experience with aircraft sextants at all, but if you wish to achive overpressure in a liquid filled container then put it into a freezer prior to sealing. When it get back to ambient (room) temperature the pressure rises and therefore the bubble shrinks. The exterior temperatures in flight are a little bit harsher than what your freezer can provide, so your sextant is not endangered (xylene's melting point is around -50 centigree, hexane's is even lower). /Thomas jean-philippe planas schrieb: > > It is also my experience that all bubble assemblies gradually loose part > or all of their xylene over time without any obvious leak or xylene > characteristic smell. > I have reconditionned 4 A10 or A10As and 5 bubble units and they all > lost part of their xylene in a matter of months. > Without refilling the assemblies in a low pressure container I don't > think we can do any better. > If anybody has a better experience on A10s, please speak up! > JPP --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---