Date: Fri, 06 Nov 1998 19:52:45 +0100
From: HendrikMaroske <HendrikMaroske@swol.de>
To: baidarka@lists.intelenet.net
Subject: Re: baidarka FOLDABLES AND welding
Stefano Moretti wrote:
> > Still, I'd like to repeat that welding aluminum structures
> > causes points of high stiffness, comparable to the addition
> > of joints to a frame to make it foldable.
>
> I never spoke about welding. Did I skip some messages ??
> I am putting external 20 cm sleeves of 20 mm external diameter over
> 18mm and fixing them with pop rivets.
Sorry for my weird comments. I wanted to say that
adding joints to a frame in order to make it foldable
in my screwed-up way is way similar to just welding
it properly. Regarding the fact that at these joints
the frame tends to become more rigid than desired.
Something else. I first built my frames with 6m
tubing, as a rigid single piece. Then I added the
folding joints to the frame. Only as a last step,
I cut through the longitudinals. I can still envision
the overall change of the frame's behaviour under
load. Amazing differences between these three
configurations.
Cheers,
Hendrik