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Well in that case, I know ALL my tanks will be
"hard" ballast. :) I can just imagine submerging in this
thing.
Myles.
----- Original Message -----
Sent: Saturday, October 29, 2005 2:36
PM
Subject: Re: [PSUBS-MAILIST] Hard / soft
ballast tanks.
I think you'll find that the terms 'hard ballast' and 'soft
ballast' refer to the physical excitement of the person in the
submarine
;-)
On 10/30/05, Akins
<lakins1@tampabay.rr.com>
wrote:
Ah yes! Brian is right Myles. I totally forgot
about the compression of the air by the water at depth in the open bottom
ballast tanks. That is another reason to use non open to the water hard
ballast trim tanks
to adjust the attitude and neutral buoyancy of
the sub at depth.
Bill.
-----
Original Message -----
Sent:
Saturday, October 29, 2005 9:20 AM
Subject:
Re: [PSUBS-MAILIST] Hard / soft ballast tanks.
The reason is that as the air gets compressed
( in a soft ballast) as you descend the volume shrinks and you have
less lift, making you sink faster. This gets you into a situation
where you are constantly readjusting to maintain a steady accent or
descent. I believe this is all in the busby book which can be bought
on the psubs web store.
Thank you
Brian
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