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Old 11-22-09, 03:48 AM   #42
kemeri
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Join Date: Mar 2006
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Quote:
Originally Posted by Sailor Steve View Post
That leaves me confused. How flooded are the ballast tanks? Fully flooded, and the boat dives. Partly flooded makes sense, but as I asked before, how precisely is the flooding controlled if the only way to flood is to open the vents? The boat can only be precisely trimmed if it is submerged.
From the theory of submarines...

There are 3 groups of the main ballast tanks: aft, stern, middle.
All the main ballast groups are flooded (blowed) completely, thus reducing (restoring) submarine buyoancy to about zero.

For exact buyoancy and trim adjusting there are 3 trim tanks: aft, stern, middle. Aft and stern tanks are used for trim adjusting, middle one - for exact buyoancy adjusting. Flooding of trim tanks is controlled precisely.

The "fast-dive" tank is used during the dive to decrease submarine buyoancy below zero (flooded/blowed completely and rather fast), thus speeding up the submarine diving and leaving water surface. Right after the sub leaving the surface, "fast-dive" tank is blowed, restoring buyoancy of the sub to about zero (otherwise the sub will sink).

AFAIK the "fast-dive" tank had been implemented from XXI project only.

I'm rather clever boy, am i not?
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