Re: [PSUBS-MAILIST] endcap/bulkhead question

[MerlinSub@t-online.de (Carsten Standfuss)]

Thats correct - the stress in the weld and how to make this 
weld is the most problem on this configuration. 

On http://www.euronaut.org/daten.htm at picture one and three you 
can see a inverted endcap - the bulkhead to the diverchamber. 
With a open diver lookout hatch the pressure hull ended here. 

Also visible with a closer look the solution I found.. for the weld 
and also to use the space. (Usefull translation Dieseltank = Fuel Tank) 

regards Carsten

Warren Greenway schrieb:
> 
> The junction between the caps and hull "tube" will be
> under tremendous stress. There will be shearing forces
> on the wleds. Also, you are creating less useable
> interior space for a given displacement. I think those
> would be some of the basic reasons. Reference Concepts
> of Submarine Design for more specifics.
> 
> Warren.
> 
> --- Emile <2stroke@hetnet.nl> wrote:
> > Hello all,
> >
> > For my future psub I consider an inverted endcap or
> > bulkhead
> > See the "drawing"of the pressure part.
> > ______
> > )_____(
> >
> > At this configuration the sphere shelfs only have a
> > tension loading what is preferrable.
> > I lookt at almost every psub design on the site but
> > no other sub has this configuration, exept for the
> > Spurdog.
> > Am I wrong in my toughts and are there high stresses
> > in the sharp transition from the sphere shelf to the
> > circular hull??
> >
> > hope someboy knows,
> >
> > Emile D.L. van Essen
> > www.AiResearch.nl
> 
> __________________________________
> Do you Yahoo!?
> New Yahoo! Photos - easier uploading and sharing.
> http://photos.yahoo.com/