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Date: Sun, 12 Nov 2006 15:00:16 -0500
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Reply-To: cskelt@earthlink.net
From: "Christopher Skelt" <cskelt@earthlink.net>
Subject: FW: RE: [LML] ES-Legacy-IV Front Strut - Corrosion Protection Compounds
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Folks,
I don't know if the CPC Bryan refers to is a specific type, or one of many
corrosion prevention compounds available for various applications.

I started building my LNC2 in the UK under the auspices of the UK Popular
Flying Asociation. My inspector, somewhat analogous to an EAA Technical
Counselor, recommended using Duralac zinc chromate paste when making up
metal to metal assemblies, particularly with dissimilar metals (like the
1000s of steel nutplates attached to aluminum with aluminum rivets). It's
OK for permanent or temporary assemblies.

Duralac is easily available in the UK where it is made and widely used also
by the sailing community, but less so in the US.  You can get it from
Annapolis Performance Sailing at www.apsltd.com or 800 729 9767. Use
neoprene or similar gloves when working with it. 

Back in the mid 1970s when I was working on the British Army's helicopters
we used Jenolite to remove corrosion from airframe parts. I understand it's
similar to the Naval Jelly that's available here. Look on www.jenolite.com

Chris Skelt
cskelt@earthlink.net
LNC2 N99XP ??%


> [Original Message]
> From: Bryan Burr <bjburr@mwheli.com>
> Date: 11/11/2006 11:36:28 PM
> Subject: RE: [LML] ES-Legacy-IV Front Strut
>
> Good Idea Rick
> Although I think I would use CPC (Corrosion Preventative Compound).  I
> have found that I make inspection of this area a part of my 50 hour (Oil
> Change) as I am working around this area for the oil change and because
> it was an integral part of my nose gear collapse.  
>
> I haven't noticed any corrosion yet but it certainly could occur in this
> hard to see area.
>
> Bryan
> N132BB
> Super ES
>
> -----Original Message-----
> From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of
> rtitsworth
> Sent: Saturday, November 11, 2006 11:41 AM
> To: Lancair Mailing List
> Subject: [LML] ES-Legacy-IV Front Strut
>
>
>
> All,
>
> I'm installing the front strut on an ES.  The strut is largely held on
> by
> two aluminum bearing blocks that are bolted to the steel engine mount (I
> believe the same/similar arrangement with a IV and Legacy).
>
> Has anyone had any experience with galvanic corrosion between those.
> Especially on the retracts - as it would seem to be an area that is not
> immune from moisture (although they are bolted tightly together).
>
> Does the paint on the mount and/or anodizing on the bearing block
> inhibit
> the formation of corrosion?
>
> Has anyone thought about perhaps an extra coat of paint there or a thin
> "smear" of RTV silicone before bolting them tightly together?
>
> I'm just trying to think ahead as I put this all together.
>
> Rick Titsworth
> ES-Building, Detroit
> Cell: 313-506-5604
> Web: www.n727rt.com
>
>
>
>
> --
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