Was just watching Jack Ryan Season 3 and seeing the display of force and their movements causes some interesting dissonance given what we know now.

  • DigitalTraveler42@lemmy.worldEnglish
    11·
    2 years ago

    IRC the French have at least one diesel sub, the SMX-Ocean Range 30,000km.

    Wait so you honestly think they’re going 30,000 km on battery power?

    Do you not get that submarine combustion engines are just like car combustion engines? You generate power through the engines and that power is stored on battery to power the electrical systems and serve as a backup, battery power is not going to power the whole entire sub and magically move the sub quietly through the water, that’s not how these things work, that’s how nuclear subs work.

    My point is, you’re not going to be able to move your sub at all on battery power, at some point you will have to turn on those loud ass engines in order to move your sub, which will absolutely alert every modern sub to your location.

    • Hyperreality@kbin.social
      2·
      2 years ago

      Wait so you honestly think they’re going 30,000 km on battery power

      Obviously not, as the article I linked to mentions the range is limited in electric mode.

      battery power is not going to power the whole entire sub and magically move the sub quietly through the water,

      It will, but the range is limited. Electricity and batteries aren’t magic. We also use them to move cars.

      that’s how nuclear subs work.

      You should read the article I linked to above. Current nuclear submarines often aren’t perfectly silent. In fact, they can be louder than a modern diesel sub running in battery only mode.

      Which is likely why the French, who do have nuclear subs, chose to build a diesel sub anyway while simultaneously also working on quieter nuclear subs.

      • DigitalTraveler42@lemmy.worldEnglish
        1·
        2 years ago

        From your article:

        Diesel Electric Submarines Diesel generator machinery can cause a great deal of noise. Diesel electrics are only quiet when operating in electric mode.

        In fact, diesel boats must raise a snorkel to have intake fresh air for combustion when operating the diesel recharging the batteries and is then visible to the world.

        u212a todaro class submarine pietro venuti U212A Todaro class submarine Pietro Venuti You cannot run silently with the diesels running and charging the electrics, you can only run silently in the electric-only mode, submerged. And because that’s off batteries, your submerged endurance is limited.

        Diesel electric submarines only use diesel mode when travelling on surface, or snorkeling. However, there is the Stirling engine submarine, that can run its two propulsion systems totally submerged.

        The works on making nuclear boats quieter