Re: Dihedral Joing Wrinkle Removal Mistake

From: Steve Fujikawa <steve_fujikawa_at_verizon.net>
Date: Tue, 04 Feb 2014 00:40:08 -0500

I used to use rubber cement thinned with
bestine. But the problem I had was that the bond
strength wasn't good after many months and the
covering came loose, particularly near the wing
posts where there's a lot of flexing. It can be
fixed by applying more of the solution, but it
was a nuisance. (Just pressing it back down
doesn't restore the bond.) I think Brett told me
to try thinned 3M77, so I switched to that. It
has a much higher bond strength and I never had
the covering detach since. The covering will tear before it comes loose.


At 12:04 AM 2/4/2014, ykleetx_at_gmail.com wrote:
>
>
>I started using the rubber cement diluted with
>Bestine for covering, as Jake has described
>several times: lightly brush the outline with
>the solution, let dry, place on covering, then
>re-activate glue using brush dipped in
>Bestine. I love this method, especially for covering the prop.
>
>I decided to use the same solution to remove the
>dihedral wrinkles. The wrinkles are gone, but
>there are two problem. The big problem is that
>the rubber cement remains a little bit tacky and
>will stick to other flying surfaces. The second
>is that Bestine evaporates quickly, so the
>solution does not penetrate as much of the
>joint. This means that more of the solution is
>needed, which means more weight and more stickiness.
>
>So don't use thinned rubber cement to remove dihedral wrinkles!
>
Received on Mon Feb 03 2014 - 21:39:53 CET