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RE: [PSUBS-MAILIST] Hull Shape question
Hello Chuck
The folder is empty there are no drawings, so it is
dificult to discuss about a drawing that is not
available.
Best wishes
Jürgen
--- Chuck Will <chuck@bestan.com> wrote:
> Adam
>
> I am still trying to finalize the shape of the hull.
> I still would like to
> go with an oval hull. The way I am looking at it is
> to use two fixed
> diameters to create the oval. It will not be a
> random oval pattern. It will
> be created from a 48" diameter tube and a 16"
> diameter tube. The top and
> bottom plate will be cut from a 48" diameter tube
> cut at the point of
> intersection with the 16" diameter side plates. It's
> sort of hard to explain
> so I made a drawing. I don't know how to post to
> Moki so you can link to it
> at http://briefcase.yahoo.com/divetruk. Look in the
> folder called drawings.
> The file name is "Oval Hull Construction". The first
> page is 2D and the
> second page has a 3D interpretation.
>
> Basically I am cutting two lengthwise sections of a
> large tube and welding
> the to two sections of a smaller diameter tube. The
> would be extensive
> bracing on the interior. I also wondered how I would
> do the hull
> calculations for strength. Would I use the larger
> 48" diameter for all
> calculations? Or do I need to do some math to figure
> a average diameter? Or
> am I still crazy to make my hull oval? It just seems
> to fit what I want
> better.
>
> Chip
> -----Original Message-----
> From: owner-personal_submersibles@psubs.org
> [mailto:owner-personal_submersibles@psubs.org]On
> Behalf Of Adam Lawrence
> Sent: Tuesday, June 07, 2005 5:00 PM
> To: personal_submersibles@psubs.org
> Subject: Re: [PSUBS-MAILIST] Hull Shape question
>
>
> Hi Chip,
>
> An oval shaped hull would be as strong as the
> largest raduis. So if your
> hull is 4 feet wide and 2 feet tall it would be
> about equivalent to
> calculating the strength of a round hull with a 7
> foot radius. But then this
> isn't exactly true since you can reinforce the heck
> out of it. But to
> maximize the weight to opperating depth ratio and
> usable inside space, the
> solution converges on a round hull with simple ring
> stiffners.
>
> Adam
> ----- Original Message -----
> From: Chuck Will
> To: personal_submersibles@psubs.org
> Sent: Tuesday, June 07, 2005 3:48 PM
> Subject: [PSUBS-MAILIST] Hull Shape question
>
>
> Hello everyone,
>
> A quick question on hull shape. I understand
> that the best shape for the
> pressure hull will be a sphere or a round tube with
> braces and with domed
> end caps. How much strength is lost with an oval
> tube? Imagine pushing down
> on a cardboard tube a bit. Flatten it out lengthwise
> just a little. It would
> have bracing inside as well. Any advice on this?
>
> Chip
>
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