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Re: [PSUBS-MAILIST] Variable Ballast Calculations



Hi Joe.
 
There would be no reason you couldn't trust your skills to cycle like that Joe.
 
Think about this. Imagine a Kittridge sub. It has two soft, open to the bottom, external ballast tanks
 
fore and aft correct? Now imagine.....you ENCLOSED those tanks so their bottoms were enclosed
 
and then you put a water inlet on/off valve at the top of both tanks on the INSIDE of the sub. Now you'd
 
have a Kittridge sub that had ambient tanks that as they filled they compressed the interior atmosphere of your sub 
 
and once under and neutrally buoyant, you could close off the valves and actually dive a bit deeper by forcing it
 
under with the dive planes. If you stopped your forward motion you would rise until you reached the point where
 
you were neutrally buoyant again. You might need to build your hull and ballast tanks a bit stronger than a typical
 
ambient though, because once you closed off the tank valves and forced her further under using the dive planes and
 
your forward motion, once you reached a depth that exceeded the internal pressure, you would need ballast tanks and
 
a hull that would hold the pressure. But I don't see it as a markedly radical deviation from building a typical ambient.
 
At any rate, it would be fascinating to see a homebuilt hybrid ambient/1atm like this.
 
Bill.
 
 
----- Original Message -----
Sent: Sunday, November 13, 2005 12:54 PM
Subject: Re: [PSUBS-MAILIST] Variable Ballast Calculations



Bill,

The "hybrid" component of the Hunley is fascinating and would be interesting to consider. But as I told you earlier, I do not trust my engineering skills enough to design the hull in such a manner as to be able to "cycle" like that. But perhaps others would be able to incorporate precisely those ideas, the savings in space and air requirements would be well worth the effort.

Fascinating links...thanks!

Joe