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- Q2238766 subject Q6812451.
- Q2238766 abstract "Silent running is a stealth mode of operation for naval submarines. The aim is to evade discovery by passive sonar by eliminating superfluous noise: nonessential systems are shut down, the crew is urged to rest and refrain from making any unnecessary sound, and speed is greatly reduced to minimize propeller noise.The propellers have a characteristic RPM band in which no cavitation noise arises. Since this rotation speed is usually relatively low, the first electric submarines had special "silent running" engines designed for optimum performance at reduced speed. These required less active cooling (further reducing noise), and were generally equipped with plain bearings rather than ball bearings. These engines were also acoustically decoupled from the hull, as they employed belt transmission rather than direct coupling to the propeller shaft.Nuclear submarines can run even more quietly, at very low speeds only, by turning off active reactor cooling during silent running. The reactor is then only cooled by natural convection of the water.".
- Q2238766 wikiPageWikiLink Q11432170.
- Q2238766 wikiPageWikiLink Q133220.
- Q2238766 wikiPageWikiLink Q16001644.
- Q2238766 wikiPageWikiLink Q18830.
- Q2238766 wikiPageWikiLink Q201666.
- Q2238766 wikiPageWikiLink Q2230467.
- Q2238766 wikiPageWikiLink Q2811.
- Q2238766 wikiPageWikiLink Q339042.
- Q2238766 wikiPageWikiLink Q6812451.
- Q2238766 wikiPageWikiLink Q757554.
- Q2238766 comment "Silent running is a stealth mode of operation for naval submarines. The aim is to evade discovery by passive sonar by eliminating superfluous noise: nonessential systems are shut down, the crew is urged to rest and refrain from making any unnecessary sound, and speed is greatly reduced to minimize propeller noise.The propellers have a characteristic RPM band in which no cavitation noise arises.".
- Q2238766 label "Silent running (submarine)".