Re: Wood Laminations and Springback

[Bertie the Bunyip]

On 24 Jan, 00:29, "Kyle Boatright" > wrote:
> I'm working on the center section for a Hatz. *The trailing edge of the
> center section is a recurved lamination that provides better access to the
> front cockpit.
>
> I've steamed and clamped the strips into a form, and they have taken on some
> of the curve, but when I unclamp 'em after they dry, I get significant
> springback. *The question is whether I need to allow for this in the
> finished lamination, or whether the springback will go away when I glue up
> the assembly?
>
> FYI, the lamination starts as four 3" x 1/4" strips.
>
> Thanks in advance,
>

Just did my first laminations a few months ago. They didn't spring at
all once they were glued up.


Bertie

[Morgans[_2_]]

"Bertie the Bunyip" > wrote

Just did my first laminations a few months ago. They didn't spring at
all once they were glued up.


Just curious, to see how your experience stacks up with laminations I have
done.

What was the minimum radius for your laminations, approximately?
--
Jim in NC

[Bertie the Bunyip[_22_]]

"Morgans" > wrote in
:

>
> "Bertie the Bunyip" > wrote
>
> Just did my first laminations a few months ago. They didn't spring at
> all once they were glued up.
>
>
> Just curious, to see how your experience stacks up with laminations I
> have
> done.
>
> What was the minimum radius for your laminations, approximately?

hmm, good question. I haven't done the center section yet, which is laid up
according to a couple of arcs. Only the tips and they kind of spiral out. I
would guess a bit under a foot radius. I steamed them first, of course. I
just used some PVC drainpipe, made a couple of plywood plugs for th eends
and plugged a domestic steam cleaner into it for 20 minutes and they were
like spaghetti. I used Areodux for the glue and they were solid as rocks
when I took 'em out.
Since that was my first stab at laminating, I tried it with some scrap pine
I ripped up first.


Bertie