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Got any Crack (s) ? - More questions

 
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Deems Davis



Joined: 09 Jan 2006
Posts: 925

PostPosted: Tue Apr 03, 2007 7:41 pm    Post subject: Got any Crack (s) ? - More questions Reply with quote

I have heard instances of cracking around the windows on several planes.
I'm hoping that the procedure that Dave McNeil published will solve that
problem. However, I'm wondering about the joint/seam between the Cabin
cover and the Fuse. Here are 2 dissimilar materials that likely have
different expansion properties.

1, Has anybody noticed/experienced any cracks developing along the
horizontal joint where the cabin cover gets joined/riveted to the
skins/longerons?

2. There is a noticeable gap between the cabin cover and the fuse, what
have people used to fill it? (Micro? Flox? fiberglass?)

3. On the rear seam/joint where the cabin cover joins to the tailcone
upper skin (double rows of rivets). Once again the CS 4-4's need to be
filled. What are folks using and are you 'filling' both rows of rivets?

4. On the above (aft) joint) has anybody done any 'filler' to
smooth/transition the curve between the tailcone and the cabin cover?

5. Has anybody experimented with fiberglass tapes over the rivet seams?
Sorry for so many questions.

Thanks for any feedback
Deems Davis # 406
Finishing - ( A Misnomer ! )
Paint Prep
http://deemsrv10.com/


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VHMUM(at)bigpond.com
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PostPosted: Wed Apr 04, 2007 2:08 pm    Post subject: Got any Crack (s) ? - More questions Reply with quote

Deems have brought up this issue with our paint supplier here who has 40
years preparing and spraying everything from 747 to a microlight. He is
retired and just helps out home builders here. He said simple, thinned down
sealant (similar to tank sealant) that you fill the void and smear over the
window as far in as you want painted.
Once dried you can sand . Primer and top coat. I am holding off until the
plane is ready to paint.

I said what some builders were doing with adding a layer of fibreglass over
the void and he was amazed!

regards Chris
--


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