[QUOTE=ashauler;76329]yep, I would like to know as well. I wasn't a ping jockey, but I know that the main sources of detection of the Russians was power plant noise (steam through pipes, cooling structures for reactors, etc.) and cavitation caused by their propellers. I was on a boomer so we never, or very rarely, ever went active on the sonar and we avoided them easily by just listening.
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From my materials prof named Fillisko, he'd give more tangents than lectures in class. I think this one was over vaccum welding equipment that allowed for smoother surfaces? I guess you can associate that with propeller cavitation... but you would have to think that it would be their newer generation of subs equipped with stuff learned inthe the early 90's.
If I recall, a cavitation vaccum needs surface defects to germinate and if you smooth out the surfaces in the sub-microscopic level you might be able to significantly reduce their formation.
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