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<div><font size="3">John,</font></div>
<div><font size="3">I had been hoping to hear your input. Was here a stack extending down from the opening to mitigate burping? -Jim</font></div>
<div style="color: black; font-family: arial,helvetica; font-size: 10pt;"><blockquote style="padding-left: 3px; border-left-color: blue; border-left-width: 2px; border-left-style: solid;"><pre><tt>there was only a man hole size opening at the lowest point of the
MBT.
</tt></pre></blockquote></div>
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<div style="color: black; font-family: arial,helvetica; font-size: 10pt;">-----Original Message-----<br>
From: subvet596 <subvet596@optonline.net><br>
To: Personal Submersibles General Discussion <personal_submersibles@psubs.org><br>
Sent: Sat, Nov 30, 2013 9:28 pm<br>
Subject: Re: [PSUBS-MAILIST] Stability & Buoyancy<br>
<br>
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<pre style="font-size: 9pt;"><tt>Hi all:
When underway the Kingston valves were usually in the open position. I believe
the US Fleet Boats were the last to have them. After WWII they were no longer
installed, there was only a man hole size opening at the lowest point of the
MBT.
John K.
(203) 414-1000
Sent via BlackBerry by AT&T
-----Original Message-----
From: Marc de Piolenc <<a href="mailto:piolenc@archivale.com">piolenc@archivale.com</a>>
Sender: Personal_Submersibles <<a href="mailto:personal_submersibles-bounces@psubs.org">personal_submersibles-bounces@psubs.org</a>>
Date: Sun, 01 Dec 2013 09:45:22
To: <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>>
Reply-to: Personal Submersibles General Discussion
<<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>>
Subject: Re: [PSUBS-MAILIST] Stability & Buoyancy
That does have to be considered in design as well as in operation. Some
sort of fluid interlock between the compressed-air valves and the
Kingstons, I would think. Or a pilot valve driven by differential
pressure that opens the Kingstons whenever the overpressure inside the
MBT reaches a certain level. Can't think of any situation where you
would want to be blowing WITHOUT having the Kingstons open.
Marc
On 11/30/2013 6:51 PM, <a href="mailto:MerlinSub@t-online.de">MerlinSub@t-online.de</a> wrote:
> Hi Alan,
> On the otherside a boat with Kingston and a
> compressed air blow out system can blow away the
> tanks very fast if you forget to open the Kingstons
> during blowing the tanks or have a air leak
> in the in the pipe to the tanks.
>
> vbr Carsten
>
>
> "Alan James" <<a href="mailto:alanlindsayjames@yahoo.com">alanlindsayjames@yahoo.com</a>> schrieb:
>
> Hi everyone,
> While reading through some background info for the G.L.
> certification document, I came across this link with a good
> explanation of stability & buoyancy
> <a href="http://maritime.org/doc/fleetsub/chap5.htm" target="_blank">http://maritime.org/doc/fleetsub/chap5.htm</a>
> There is a phenomena described, where submarines can be
> unstable to the point of turning over during the transition from
> surface to diving & vice versa.
> This has to do with the centre of buoyancy moving upward past
> the centre of gravity. As it approaches the centre of gravity the
> submarine is at it's most vulnerable point.
> This would be different for individual designs & a worry if
> you dropped your emergency drop weight.
> I had been told by a pilot that he never stuffed around while
> descending & liked to drop as quick as he could.
> I didn't have a full understanding of this & thought there may
> be others in the same boat.
> Regards Alan
>
>
>
> --
>
> Carsten Standfuß
> Dipl.Ing.Schiffbau @ Meerestechnik
> Heinrich Reck Str.12A
> 18211 Admannshagen
>
> 0172 8464 420
> <a href="http://WWW.Euronaut.org" target="_blank">WWW.Euronaut.org</a>
> <a href="mailto:Carsten@euronaut.org">Carsten@euronaut.org</a>
>
>
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</tt></pre>
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