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Re: Europa-List: Bonding CS14 Brackets to Fuselage sides

Subject: Re: Europa-List: Bonding CS14 Brackets to Fuselage sides
From: NevEyre@aol.com
Date: Fri, 19 Nov 2004 14:06:00

Hi All, still here and watching ! ! !
Scuff sand with 80 grit paper, best to get into the glass [ just] which will 
mean getting most of the gel off.No need to get all of it off, it is Epoxy. DO

NOT GO OVER THIS AGAIN WITH SCOTCHBRITE !  All you are doing is polish the 80 
grit scratches to a finnish equivalent to about 600 grit. This will 
compromise the bond.
It is my [ not the ''official Europa's] opinion, that any lay up onto Alloy 
is best done with Redux. Scuff the Alloy JUST before doing the lay up [to 
prevent the alloy oxidising]. Warm a little Redux, so it thins out, and wet out
one 
ply of Bid, and Peel ply, and let cure. [1 day ?]
Remove the peel ply, and add any further plies,with Laminating Resin, as per 
Manual.
The Phenolic firewall just needs scuffing with 80 grit, get all the gloss of 
the moulded side, hit the non moulded side enough to expose the 
glass.Laminating Resin is fine for these lay ups.
There has never been a problem with the CS14 bracket coming unbonded, but the 
Redux used under the Laminating Resin should, in theory, ''grab'' the Alloy 
better.
Playing a hot air gun over the area when wetting the cloth out with Redux 
will help it soak into the cloth. 
Cheers,
Nev. 




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