Inventors hope maiden voyage will help usher in new era of greener shipping.
  • Carighan Maconar@lemmy.worldEnglish
    20·
    1 year ago

    This is fascinating, the sails look quite different from what I would have imagined given the name. Looks more like those ships with the rotating cylinders on them visually, even though of course those operated on a very different principle.

    Excited to see how well this works. Would be amazing if they could slash fuel usage significantly, I remember reading even those oversized kites already did a fair bit.

  • frostwhitewolf@lemmy.worldEnglish
    8·
    1 year ago

    Amazing, I was reading about the idea of them doing this a while ago. Makes me wonder if the future of shipping will see a return to some of the old trade routes that are more favourable for the winds.

  • MeanEYE@lemmy.worldEnglish
    6·
    1 year ago

    Okay, some explanation, this is not exclusively wind powered but wind assisted. Sail is meant to aid in reducing fuel consumption. Design of the sail, which is what most people are finding odd, is as such to require very little management, since it’s using Mesner effect it only requires adjusting speed and direction of rotation. At the same time design is such as to not hinder loading and unloading process. Also claimed 30% is grossly exaggerated.

    Why hasn’t this caught on yet you might ask? Well ship owners don’t give a shit. Simple. The cost of fuel is calculated in transport cost and since no one else is doing it, why would anyone do it. Cargo ships have multiple fuel tanks and they will burn pretty clean fuel while they are in controlled areas (EU/USA). The moment they leave those areas they burn the dirtiest and also the cheapest fuel possible. Why wouldn’t they when their engine’s piston is so big human can lie in it. I mean just look at the crankshaft

    So all in all, this could have been done ages ago. The sail is called Flettner rotor and has been invented in 1920s. Image on site shows a bit different design, but probably based on same physics just slightly more optimized. The reason why it wasn’t done ages ago… well, simply fuel was too cheap and paid for by another.

  • bcoffy@lemmy.worldEnglish
    2·
    1 year ago

    I wonder how practical it would be to recommission old nuclear aircraft carriers as cargo ships

    • MeanEYE@lemmy.worldEnglish
      2·
      1 year ago

      General rule for ships, at least heavily loaded ships, is to retire after some 60 or so years. There’s no exact number but it exists for each type of ship. Reason is material stress. Even though ship might look okay, they have a lot of stress when transporting cargo or in general dealing with waves. In time, these stresses cause material stress and eventually fracture.

      This is the reason behind those videos on YouTube where ship splits in half in high waves. It’s not that ship can’t handle high waves, it’s simply that ship owner wanted to squeeze more money out of the vessel and didn’t want to retire it, even though he was most likely advised to do so.