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Will rewrite history as we know it
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this post was submitted on 31 Oct 2023
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That doesn't look practical at all. The point of cargo ships is to move containers, so they put them out in the open for rapid loading and unloading... Plus this "aerodynamic" design makes no sense. Most of the drag comes from what's under the water at low speeds and if it's a sailboat the wind will be behind them. At the scale of cargo ships some are 400m long, meaning these sails could be 200 m or more high... the small flexible blades on a wind turbine are 80 m at most.
This looks like it might be a roll-on/roll-off cargo ship, which have covers like that. But at the speeds a ship travels aerodynamic drag is minimal so you’re right about that.
And those sails will make going under bridges pretty hairy unless they can be stowed somehow.
They're telescoping so they can retract them for bridges or inclement weather.