Re: Dihedral Joing Wrinkle Removal Mistake

From: Jake Palmer <82.jake_at_gmail.com>
Date: Mon, 3 Feb 2014 21:46:44 -0800

I wonder if the type of rubber cement plays a role, because I have some ~13
year old intermediate stick wings and the film is still firmly attached.


On Mon, Feb 3, 2014 at 9:40 PM, Steve Fujikawa
<steve_fujikawa_at_verizon.net>wrote:

>
>
> 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 - 21:46:45 CET