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Originally Posted by Seeadler
But it is not a diesel sub, it's Hydrogen cell powered, it drives only with electric motors, therefore it is almost noiseless  |
I think, this is not correct. As far as I understand U212-A has a 'hybrid-propultion-system'. The screwback propeller is driven by a Permasyn Engine (less [or maybe no?] cavitation). This engine can get engergie from two different systems: For max speed it is driven by batterie, which has to be charged from time to time by a 'advanced' (silenced) dieselgenerator. Snorchel times are greadly redused. For low speed there is the Hydrogen cell engine, which produces only clean water as 'Exhaust gases'.
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Source:
http://www.duxu.de/marine/U-Boote/3b...chnisches.html