RE: [PSUBS-MAILIST] Need formulas please - ALSO NEED DATA!

["Marten Liebster" <mliebster@tbteam.com>]

Erik,

What's the purpose of the site?

What's the URL?

ML

-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Erik Muller
Sent: Monday, May 03, 2004 2:08 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Need formulas please - ALSO NEED DATA!

Good luck with your endeavor Marten,
I have arranged to have a data entry site available online for the last few
months in the hope that people will share some data...to no avail! 
Perhaps the people with working subs are too busy driving them to spend a
few minutes putting the numbers in!
Come on guys!! pleeeeeeeease?
EM.

P.s. Dig, Prod, cajole, harrass etc. etc. etc.


Marten Liebster wrote:

>As my emails have shown, I am in the process of understanding all that 
>goes into designing into a PSUB. I always thought of it as: 1) Design 
>it so that it's round. 2)Put on some ballast tanks 3)Fill them until 
>you sink. 4)Blow them to rise.
>
>I've received much insight the past few weeks as I started to take a 
>serious look into it. This was achieved by posting here, reading 
>archives and looking through psubs.org.
>
>Someone posted that at 100' there's more than 6,000 psi on the hull. I, 
>as a programmer not a engineer, would like to be able to calculate such
things.
>The spreadsheet that allows you to enter variables to end up with a 
>crush depth, is also great.
>
>I would like to put together a website or application that would 
>contain the many various pertinent formulas. Formulas such as being 
>able to calculate the weight of the hull, how much air volume inside my 
>pressure hull, how much water needs to be brought in to sink the sub,
etc...
>
>This would be publicly available to hopefully assist others. Perhaps 
>even include the ability to save specific info about the user's sub to 
>save time in the future. Including internal items that add weight and 
>take away from the internal air volume.
>
>So I would appreciate it if people could send formulas (with 
>descriptions) and point me to the various places that contain such 
>formulas. Also any laws
>(natural/scientific) that govern the operation of a sub would wonderful.
>
>I want to be able, with some degree of confidence, determine what a 
>safe operating depth a design would be capable. If I can help others to 
>safely design their subs, it would be my way of giving back for all the 
>help I've thus received.
>
>Marten
>
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