5 thoughts on “Japanese Subs Spotted”

  1. 10 Cents:
    This is the Kawasaki Shipyard. Behind the subs there looks to be a dry dock.

    They have a permanent drydock set up to make two at a time:

    plus two floating drydocks:

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  2. Japan has 19 attack submarines. I wonder how long they can stay under. Battery technology is better and they might have another method to power the motors underwater. (I saw that the new boats can go for about 20 days underwater. )

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  3. 10 Cents:
    Japan has 19 attack submarines. I wonder how long they can stay under. Battery technology is better and they might have another method to power the motors underwater. (I saw that the new boats can go for about 20 days underwater. )

    They had Stirling cycle air-independent power:

    https://en.wikipedia.org/wiki/Air-independent_propulsion#Stirling_cycle_engines

    https://en.wikipedia.org/wiki/S%C5%8Dry%C5%AB-class_submarine

    The latter wiki entry suggests that lithium ion batteries recently adopted are so energy dense that they moot the Stirling engine for the latest boats.

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