Re: [PSUBS-MAILIST] end caps [was: what is the diference k250- k600]

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

On Mon, 13 May 2002 23:13:56 +0200
MerlinSub@t-online.de (Carsten Standfuß) wrote:

> Means the stern endcap of CSSX want to go forward with a pressure 
> of 1568 tons - and the forward endcap want to meet the stern endcap with 
> the same force. I am just between them :-) . Also the connection between 
> the endcaps and the cylinder has to be checked carefully - one reason 
> that the standard endcaps comes with a short cylinder part - is to get
> the 
> connecting welding out of this  area.. all this force turns from the big 
> curve of the encdcap to the hard curve - and than to the cylinder. 
> The point between the big curve and the hard curve is the weak point. 

Very interesting, I've been thinking about using two end caps
welded together as a two person pressure hull.    The end caps
I had in mind was a six foot diameter 2:1 elliptical end cap
made of 12.5mm thick steel.   

This doesn't seem like a good idea after reading that, since
it's not easy to have the entry/exit hatch clear of the
waterline and avoid having any welds in the weakest/most stressed
area (where the big curve meets the little curve)...

I posted a schematic of the two end cap sub on subfiles,
look for "fish shaped submarine" at:
    http://www.prismnet.com/~moki/subfiles.html

Thanks for the information,

   Ian.