At the current time, we are in San Francisco, just “doing the tourist thing.” Today, while at Fisherman’s Wharf I noticed they had an old WWII Submarine. For $9 you can wander around it.
It was actually money well spent and very impressive. The sub was in great condition, even though it was constructed in 1943.
There was an “old guy” aboard who had been on a sister sub during the war, and had some good information. To my surprise the sub was diesel electric! It was over 300′ long, and could move on the surface at 21 knots and under water at 9 knots. It had five generators to provide the power, and two very large electric motors to run the props.
Nordhavn experimented recently with offering diesel electric on their Nordhavn 76. Briefly, my boat was slated to be diesel electric. Fortunately Nordhavn decided to back me off to normal propulsion. The owner of the 76 that was diesel electric has recently decided to back off to conventional propulsion. I spoke, only briefly, to the owner about his reasons for the refit, and the bottom line seemed to be stability and maintainability for long-distance passages.
Given that the sub was built 60 years ago, one would think that diesel electric would have been perfected by now.