Re: [PSUBS-MAILIST] Inner / Outer support ribs.

[Ian Roxborough <irox@ix.netcom.com>]

Hi Gene,

I think you might end up with a slightly oval cylinder rather than around.
If the ribs are manufactured in the same way, they also have the same
deformity.  Of course the ribs may still fit, but the won't be any help
pushing the cylinder into round.

A slighly oval hull might still work, although you would want to calculate
the crush depth based on the longest curve of the hull.  I'm not sure about
safety factor, might have to increase it depending on the % of out of
round.  I've heard that out of roundness is a factor that makes it hard
(impossible?) to accurately calculate crush depth.

Cheers,
  Ian. 

On Fri, 11 Nov 2005 01:59:29 EST
HUNTR2@aol.com wrote:

> Hi Dan and Rick,
> I understand Rick's drawing of rollers and hope Dan has a clever way around  
> the problem of last few inches being unbent.  I was wondering why you don't  
> just get a piece of metal 5 inches wider than you need, and after you roll 
> it...  cut of the edge that didn't get bent?
> Same with the stiffeners.  
> Gene
> 



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