Just to keep things in perspective I've seen Kagan fold the wing on his HLS and the model come down in a clump of balsa and mylar. Then an hour later it was back in the air pushing the world record. But I didn't know his miracles included repairing a wing in flight!
I would think that super stiff spars would break if deflected the way described.
----- Original Message -----
From: Tapio Linkosalo
To: Indoor_Construction_at_yahoogroups.com
Sent: Friday, September 26, 2008 1:23 AM
Subject: [Indoor_Construction] F1D wing spars without boron Was: USA Team Manager Report
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-
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Received on Fri Sep 26 2008 - 05:43:14 CEST