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GrummanDude
Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA
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 Posted: Wed May 09, 2007 10:32 am Post subject: Metal-to-metal bonding |
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I'm in the process of getting an STC to repair the horizontal bracing
using an approved metal-to-metal bonding similar to that used to make
the part in the first place. This wll eliminate the row of rivets down
the side. Plus, the fuel tank sealant currently being used is not a
bonding agent and the rivets being used are only a fraction of the
strength of the original bonding.
Does anyone know what the name, maunfacture, and the bonding strength
characteristics (shear and tensile strengths) of the bonding material
used in our planes? A lot has happened since metal-to-metal bonding of
our planes began. Today, there are several approved procedures. I
just need to find one that meets or exceeds the original specifications.
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Gary
AuCountry Aviation
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i.r.m(at)btinternet.com
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| Posted: Wed May 09, 2007 2:13 pm Post subject: Metal-to-metal bonding |
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On my tour of Chem Fab they said they used Hysol 9309 Epoxy paste http://www.loctite.com/int_henkel/loctite/binarydata/pdf/Hysol_EA_9309_3NA.pdf for cold bonding to fill any after bonding voids or in areas where hot bonding wasn't needed or couldn't be done. I assume you are talking about cold bonding. >From what they were saying to get any approval at that time for using this stuff for field repairs was almost impossible due to the stringent controls on preparation and proper priming of the surfaces. I did ask them if it was going to be possible to use it for bond repairs and they indicated it would most likely be included in Tiger's maintenance manual once they had their production certificate, but I never saw it produced.
Ian
MatAir
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GrummanDude
Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA
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| Posted: Thu May 10, 2007 12:21 am Post subject: Metal-to-metal bonding |
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Hi Ian, The DER with whom I am working (one of them) is a structural
engineer. He is really into current methods of metal-to-metal bonding.
I need the previous hot bonding specs so we can make a 'same form,
fit, and function' comparison. I'll check out the .pdf you referenced
and see if that helps me.
Thanks a bunch.
Gary
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Gary
AuCountry Aviation
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