Re: F1D wing spars without boron Was: USA Team Manager Report

From: Nick Aikman <nickaikman_at_hotmail.com>
Date: Fri, 26 Sep 2008 06:22:21 -0000

Hi Tapio,

If the wood is good with straight and even grain, 5.0lb X 0.034 or
0.035"" is about right. The wood should have a stiffness rating of at
least 110.

Nick.

--- In Indoor_Construction_at_yahoogroups.com, Tapio Linkosalo
<tapio.linkosalo_at_...> wrote:
>
>
> On Thu, 18 Sep 2008, Brett wrote:
>
> > Round 4 Highlights:
> ...
> > He [Kagan] steered again, but while trying to release the model
he pulled
> > down too hard and I saw both wing tips flare up into a V shape.
I let
> > out a loud groan thinking a wing spar had broken. Kagan
though "ever
> > on his game" raised the balloon a few inches and the wing popped
back
> > into shape. After he released it everyone was amazed to see it
still
> > in the air. This seems to be a clear indication of the
superiority of
> > non-boron wing spars.
>
> What sort of wood is needed for such wing spars? Dencity, stifness
> coefficient, dimensions, weight?
>
> Thanks,
>
>
> -Tapio-
>
Received on Thu Sep 25 2008 - 23:22:25 CEST