Re: [PSUBS-MAILIST] Hull Shaping Question

["George Slaterpryce" <gslaterp@hotmail.com>]

Why not make a standard preasure hull and then tack on a nose cone to that? 
this way you get both the benefits of a solid preasure hull without adding 
surface area and the streamlining affect of a foreward cone superstructure 
for streamlining. You'll have a bit more weight forward to compensate for 
but you can fix that relatively easily.

Machining? Putting your hull form on a lathe and machining it? I'm not 
entirely certain how larger hulls are fabricated, the biggest hull I've made 
so far was 12' long by 6' diameter and I did that on a lathe. The endcaps 
where also done on a lathe. I doubt however that you can get a whole hull 
the size needed for a human being machined like I do for my ROV project and 
test pieces.

I'm sure someone else would know more about the process for larger hulls, I 
just wanted to throw the "Keep the preasure hull and take on a streamlined 
superstructure" idea out there. Just seems a lot safer to me.

George Slaterpryce
----- 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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