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A comment on World’s Largest Containership Also Sets Record for Largest Engine Ever. Parent comment

Re:World’s Largest Containership Also Sets Record for Larges... by vibrolax on Tuesday November 25, 2014 @11:25PM (#8661099)
The other reason is that the screw speed for a large vessel is about 100 RPM. It is better if the engine can drive the screw without a reduction gear that would decrease efficiency.

http://www.gizmag.com/go/3263/

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Re:World’s Largest Containership Also Sets Record for Larges... by cellularmitosis on Tuesday November 25, 2014 @11:28PM (#8661100)
I think that's backwards reasoning. If the engine ran more efficiently at 200 RPM, they wouldn't install a transmission, they'd just use a smaller screw.
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Re:World’s Largest Containership Also Sets Record for Larges... by myrryr on Wednesday November 26, 2014 @12:26AM (#8661200)
and they would get more cavitation. Which is bad.
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