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Subject: Submarine tech question?
Sentinel    1/20/2005 12:41:48 PM
How do the propeller drive shafts penetrate the hull and not leak at the seams? Obviously, there is a very tight joint. But, It seems to me that even a tight joint would leak some water, especially if that joint were exposed to pressure found at depths. Does anyone know??
 
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CJH    RE:Submarine tech question?   3/19/2005 9:35:02 PM
I found something at page 17 of link . On inboard engine powered boats, the propellor shaft goes through a stuffing box mounted on the inside of the hull and stuffed with a combination of grease and cotton. If the stuffing box is stuffed well very little water leaks in around the shaft. It looks as if submarines have a very tighter version of the stuffing box. The shaft goes through a box mounted to the hull. An annular ring fixed to the shaft confines the "sealing elements" against the end of the box.
 
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