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|21st January 2016, 18:24||#16|
Join Date: Jan 2016
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Re: The Dutch Navy Museum
Great to see such a well maintained piece of history !! The pics are excellent and catches the details very well.
Foxbat, many thanks for the link on the Indian Sub.
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|23rd January 2016, 11:03||#17|
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Re: The Dutch Navy Museum
The Dutch were and still are leaders in submarine innovation and design. The 3 cylinder (ie pressure) hull was introduced in the 1950s so that each pressure hull could be made smaller and stronger and hence give the submarine a greater diving depth. The three were arranged forward, aft and topside with a streamlined (non-pressure) hull covering the three pressure hulls. The forward hull contained the forward torpedoes, sonar & reserve torpedoes. The aft one contained the engines & aft torpedoes. The top one contained the control room (or bridge). Today this is not needed as steel alloys and welding methods allow a single large pressure hull to be made strong enough for the desired depth. For a submarine depth and silence are its cloak of invisibility. Submarines are the original stealth service.
In the 1970s the Dutch were the second after the Swedes to introduce the X tail fins that enabled a submarine to sit at the bottom of a shallow sea and thus wait for its quarry in total silence. The X shape shown in the photo below has only now been adopted by other navies. It requires a very complex computer managed control as opposed to the more usual vertical & horizontal cross shape for the tail controls.
X arrangement of aft tail controls of a Dutch Walrus class submarine. Note how each tail surface has two parts (see one at bottom left) - one fixed part for stability and an outer moving part for maneuvering. Note the streamlined teardrop shaped hull which enables modern submarines to cruise at a fraction of the power for a given speed as compared to earlier cigar shaped hulls (of the Tonijn for example). In this photo the submarine has been lifted out of the water with the aid of ballast barges for hull maintenance.
Last edited by V.Narayan : 23rd January 2016 at 11:14.
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