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Originally Posted by Bubblehead Nuke
The main noise of a nuke sub is not the screw anyway, but the required gear to operate the nuclear plant and support systems. You have a constant noise level that is essentially unchanged until certain parameters are met. The screw is designed to be cavatation resistant until these conditions are exceeded and by that time ultra quietness is no longer the absolute requirement.
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That's very interesting :hmm: Makes sense. Is that one of the additional reseasons that SSKs on electric power can be quieter than SSNs, not just because of lack of the need for reactor coolant circulation, but because electric moters don't require reduction gears? Or do they? Guess I'll look it up
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Originally Posted by MaHuJa
Generalizing a lot, but if you think of SSKs as being slow anyway (going fast will tear into the batteries fast) then the pumpjet reducing top speed won't matter much.
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Yeah, its a pretty broad generalization. I chose speed because is my cavitation is a problem I can always reduce a subs SOA, it will just take a little while longer to get where your going, but can still achieve the same level of quietness at a slower pace. In my DW experience, top speed comes up mainly when I'm running for high heaven away from torps and that's when "slowness" hurts the most, can't do anything but get out and push!
