I'm starting work on a 1/10th scale Laird Solution, in Depron, balsa and
I had forgotten just how long it takes for 'foam safe' CA to set on
Depron (I well remember that nothing else seems to stick at all,
however). Even with accelerator it's still slow to cure, and I'm not a
particular fan of accelerator.
So, what are your experiences gluing Depron? Do you have any magic? Or
should I just use foam-safe CA and expect it to take a while to cure?
On Thu, 03 Dec 2009 23:01:44 -0600, Tim Wescott wrote in
There are some good ideas here:
These folks say "use a kicker" with the CA:
And dozens of other similar pages:
Let us know what works for you!
Thanks Marty. I really should have Googled...
One of the posts talks about using canopy glue -- I'm going to try that.
Foam-safe CA seems to be doing well where I'm gluing wood or carbon fiber
to the foam. But I recall the CA not wanting to set in the presence of
the foam alone; even with accelerator it would set around the edges and
take forever to cure in the middle. It'll be _very_ interesting to see
how the canopy glue does.
They also mention some UHU Por -- I'll have to see if the local craft
store has some, as it sounds ideal for some foam-to-plywood joints that
are going to be problematic any other way.
This is going to be one fun plane -- it's actually #2 in a series. The
first was a 1:10.5 scale to get the wingspan at exactly 24 inches. I
learned a lot: about building with foam (don't use it for interplane
struts!); Laird Solution aerodynamics (the rudder is too small -- my
prototype flew sideways, and later I ran across a transcript of a talk by
Jimmy Doolittle where he complains about marginal yaw stability in the
full scale Super Solution); planning (you really do need to decide how
you're going to attach the landing gear _before_ you build (I knew this,
but had reasons for ignoring it)); and finally about painting foam (use
Krylon H20, and paint the dark parts white before you paint them
This one ought to be vastly improved by the lessons learned from the
prototype -- and even though it was ugly as sin once it really flew, it
flew really well. So I'm expecting a good-looking, nice-flying, fast
airplane that'll rise off ground for this revision.
On Fri, 04 Dec 2009 00:54:10 -0600, Tim Wescott wrote in
A worthwhile experiment!
I've used Goop for some odd jobs. I imagine it would be
too heavy and too slow-curing for your application.
WOW! And I thought Gorilla Glue was expensive!
Sounds like you learned a lot.
I think GOOP might eat Depron and it is heavy. Canopy glue cures SLOWLY in
my experience. There are some really good foam safe CAs and kicker but it
seems like it was expensive.
Billy Hell rings a bell.
(I may have al URL somewhere)