RE: [PSUBS-MAILIST] Pressure Hulls

[Alec Smyth <Asmyth@changepoint.com>]

Pat,

About a year ago, I looked up the formula for spheres (can't remember if it
was the same one you just used though) and ran some numbers based on
examples of sperical-hulled boats in Busby. The formula was simple enough,
but the pressure ratings I got were way higher than the ratings given in the
book, which left me a bit puzzled. Its hard to mis-calculate with such a
simple formula. D'you know whether common practice might be to use an
inordinately high safety factor with spheres, given they're so sensitive to
out-of-roundness? I'd pull out my Busby and run some numbers with this
formula to see how it jibes, but I'm at the office. So I really should get
back to work! But I'll try doing this later.

rgds,

Alec

-----Original Message-----
From: Captain Nemo [mailto:vulcania@hawaii.rr.com]
Sent: Monday, July 01, 2002 2:05 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Pressure Hulls


Dewey,

I wasn't worried about that; just clarifying that mine was an exercise with
the formula, not an estimate of your particular hull's capabilities.

Pat



----- Original Message -----
From: "Dewey Mason" <drmason2001@yahoo.com>
To: <personal_submersibles@psubs.org>
Sent: Monday, July 01, 2002 7:25 AM
Subject: Re: [PSUBS-MAILIST] Pressure Hulls


> Hey All,
>   I assure you I think highly of you all, HOWEVER,,,,
> I will double check ALL math on my sub, I promise. Not
> that I don't belive you, just that I don't breath
> water, and feel no desire to be smooshed inside a
> steel ball. Sounds unpleasant.So you need not worry
> that I will kill myself and then blame you.