Message-ID: <36194693.2D4774BD@bltinc.com>
Date: Mon, 05 Oct 1998 18:22:11 -0400
From: Ed McCauley <emccauley@bltinc.com>
Organization: Bottom Line Technologies Inc.
To: "lancair.list@olsusa.com" <lancair.list@olsusa.com>
Subject: Hinges and rivets (continued)
Mime-Version: 1.0

          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
          <<  Lancair Builders' Mail List  >>
          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> 
>>
Thanks to all that expressed their ideas on bonding the elevator and aileron trim tab hinges to the
carbon skins.

I'd like to ask for some "deep thought" on the subject.  After I read everyone's concerns about not
using rivets I have two more questions:  

1. If I counter sink the rivet, the actual contact area of the rivet to the carbon is so minimal it
would seem that tensile strength could hardly exist.  
2. If I 'beef up' the carbon from behind, I would think that, because of the relative surface areas
involved, the tension of the rivet is actually being taken more by the 'beefing up material than'
the outer carbon skin. On other words, if that's the case, isn't the rivet being held to stuff
that's just epoxied to the skin (from the inside), not the skin, itself? If so, aren't I right back
to what I already have?

Both of the hinges that I secured with epoxy and flox SEEM incredibly strong. I don't think I could
get the hinges off (without Mr. Heatgun) if I tried.  I have NO problem sticking a few rivets in, I
just wonder what REAL good they'll do.

Thanks again for your help group.

-- 
Ed McCauley
Lancair IV-P
Milford, NJ