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: Jean-Philippe Planas
Date: 2007 Dec 13, 12:22 -0800
From: Jean-Philippe Planas
Date: 2007 Dec 13, 12:22 -0800
Hello Thomas,
Yes it's a good idea and anyway it goes in the correct direction to keep/form a suitable bubble.
Has anyone on the List experimented this technique?
JPP
Thomas Kleemann <Rule_No.1@web.de> wrote:
Yes it's a good idea and anyway it goes in the correct direction to keep/form a suitable bubble.
Has anyone on the List experimented this technique?
JPP
Thomas Kleemann <Rule_No.1@web.de> wrote:
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
Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. --~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to NavList@fer3.com
To , send email to NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---