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Submarine Related Chatter / Re: Engine room noise level
« on: November 07, 2014, 04:18:50 PM »
I'm currently taking care of the engines on the Silversides and have been for the past five years. We start them up about every three weeks during the summer to keep them alive. Currently we are only running # 3 & 4. I am a retired senior chief engineman and like most now just a little hard of hearing but spent a lot of years on watch. Because the boats are DC power 60 cycles does not apply. As for sounds all different manufactures engine had there own sound. Fairbanks are in my opinion the best built and sweatest sounding. When it came to snorkeling they couldnot be beat. A rule of thumb was run main engines at a 80 / 90 combination. Eighty percent speed, ninety percent load, they would run forever. I don't think the railroads have run fairbanks for many many year. there using 645's mostly. This could account for the sound you are referring to. Contact me if i can answer any of your guestions.
Frank Lydell
Frank Lydell