Mailing List lml@lancaironline.net Message #14355
From: <Newlan2dl@aol.com>
Sender: Marvin Kaye <marv@lancaironline.net>
Subject: lead weights
Date: Fri, 12 Jul 2002 08:12:32 -0400
To: <lml>
I was wondiering if anyone has tried using a vacuum pump to provide pressure for clamping wing skins on to the spars.  I know the traditional way is to put lead weights along the wing above the spar but vacuum can be a lot more even in distribution.

The one BIG thing to watch is vacuum pressure since only a very small amount of vacuum would be required, (I know I'll hear some screaming on this!)  Therefore a good vacuum gauge and valve would be required.  I use vacuum frequently for composite construction of all sorts and once you get use to it, it's a really great way to build.  For clamping, it's great!  But a wing would have ribs and large unsupported areas that could break under excessive bending load.

Like I say, it's a great way for some things, but I don't know if anyone has tried it for this sort of thing.  Extraordinary care would be required.

Dan Newland

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