Re: [PSUBS-MAILIST] Hull Shaping Question

[Rob Ossian <rob_neptune@yahoo.com>]

My sub design is for a dry 1 atm sub.  I only
mentioned the shallow water (200') issue so everyone
would know that I would not be attempting to dive it
to greater pressure depths.

At this point I am looking to build the main pressure
hull out of .25" aluminum alloy, and the tapered nose
out of 3/5" aluminum alloy (thicker to compensate for
bend/stretching; Thanks for the tip, Carsten!).  I am
compiling the specs to survive a depth of 400', even
though the Colorado River (where it will be used) has
a max depth of about 200'.

Thanks for checking,
Rob
--- "Dan H." <jmachine@adelphia.net> wrote:

> Rob,
> 
> You say a shallow WET sub for 200ft.  I'm guessing
> you really mean a DRY sub 
> don't you?
> 
> You can make your hull out of steel with standard
> tank ends and create what 
> ever shape you want to affix to it out of
> fiberglass.  My K-350 sub, 
> "Persistence" is made like that.  The fore and aft
> fiberglass fairings are 
> the main ballast tanks.
> 
> Dan H.
> ----- Original Message ----- 
> From: "Rob Ossian" <rob_neptune@yahoo.com>
> To: <personal_submersibles@psubs.org>
> Sent: Monday, February 27, 2006 11:50 AM
> Subject: [PSUBS-MAILIST] Hull Shaping Question
> 
> 
> >I have some questions about hull construction and
> was
> > hoping that some of y'all might be able to lend a
> > little assistance?
> >
> > The project I am working on is a shallow water sub
> > (designed for lake use, max lake depth is 200')
> and so
> > I am making a slightly pointed nose cone for the
> bow
> > of the sub.
> >
> > My questions are:
> >
> > - What is the terminology for the processes of
> > rolling a shaped hull?
> > - Does anyone out there have any experience in
> > producing such a nose cone shape?
> > - Since I will likely be outsourcing this part of
> the
> > assembly to an ASME certified welding shop (for
> safety
> > reasons) how could I best convey what I am trying
> to
> > achieve more coherently than I have above?
> > - Does anyone know of any other nose cone shaped
> subs
> > out there?
> >
> > Any help would be apreciated!
> >
> > Thanks,
> > Rob
> >
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