RE: [PSUBS-MAILIST] Main ballast.

["Alec Smyth" <Asmyth@changepoint.com>]

I recall seeing that same exact concept on some ancient sub drawing, by
somebody like Da Vinci. In theory I don't see why it would not work,
especially as in an ambient design it would be far easier to turn the
screw.

Alec

-----Original Message-----
From: Pierre Poulin [mailto:pipo305@hotmail.com] 
Sent: Thursday, May 22, 2003 3:23 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Main ballast.

Since my sub is a dry ambient,

Could I use some sort of cylinder with a piston that can be moved inside

with a screw. On one side of the piston, ambient water, on the other
side, 
ambient air from inside sub.

You just turn the screw one way to get water in. turn the other way to
push 
water out.

What about that?

Pierre Poulin

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