M77 spray

[Tom Hinton]

I have used urethane on cores and such but was a little concerned about
using it on a turtledeck due to the shape and the need to clamp/ tape/
weight down. . How much weight is needed to hold it down so that the
expansion doesn't push the balsa off?
thanks
----- Original Message -----
From: "Tom Simes" <nsrca at shinymetalass.com>
To: <discussion at nsrca.org>
Sent: Thursday, February 03, 2005 5:58 PM
Subject: Re: M77 spray


> On Thu, 3 Feb 2005 13:42:42 -0900
> Tom Simes <nsrca at shinymetalass.com> wrote:
>
> > On Thu, 3 Feb 2005 17:31:18 -0500
> > "Tom Hinton" <tph1 at bellsouth.net> wrote:
> >
> > > Anyone use M77 contact cement spray to attach balsa to foam anymore>
> > > I was thinking of using it to attach the foam turtledeck on my
> > > Widebody? Any thoughts? thanks, Tom
> >
> > Be very careful with that!  3M has changed the solvent in that
> > adhesive and it is no longer foam safe for many types of foam.  If you
> > want to use it, make sure you test on some scap first.  Personally I
> > haven't used anything but the polyurethane glues for gluing foam since
> > I found out how easy they are to work with and what a good bond they
> > make.
>
> Just in case you haven't used the polyurethane glue before, I've been
> following the method described by Wayne Galligan and it works great:
>
>
http://lists.f3a.us/mailman/htdig/nsrca-discussion/2004-October/022424.html
>
> The glue foams as it cures which drives it into the interstitial spaces
> of the materials being glued creating a very strong bond.  Because of
> the foaming, you can and should be very sparing in the application of
> the glue - the light sheen is all you need.  Unlike contact cement, you
> can reposition to get things "just so" if necessary.
>
>
> --
> Tom
>
> _____________________________________________________________________
>
>        |  ,  |               Tom Simes
> ---------(@)---------        AMA 230068
>         --|--                NSRCA 3830
>           '                  nsrca at shinymetalass.com
> =================================================
> To access the email archives for this list, go to
> http://lists.f3a.us/pipermail/nsrca-discussion/
> To be removed from this list, go to http://www.nsrca.org/discussionA.htm
> and follow the instructions.
>
>

=================================================
To access the email archives for this list, go to
http://lists.f3a.us/pipermail/nsrca-discussion/
To be removed from this list, go to http://www.nsrca.org/discussionA.htm
and follow the instructions.