Comment on why do reverse thrusters work on an airplane, but a fan on a sailboat doesn't work?

• Kyrias@lemmy.ca ⁨5⁩ ⁨hours⁩ ago

  I prefer Lemmy to Reddit but the userbase here is way more insufferable.

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  • cattywampas@lemmy.world ⁨5⁩ ⁨hours⁩ ago

    It’s a venn diagram of people banned from reddit and people who think they’re too good for reddit, what do you expect.

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    • Kyrias@lemmy.ca ⁨3⁩ ⁨hours⁩ ago

      Haha, good point.

      Just wait, what does that make us?

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      • cattywampas@lemmy.world ⁨3⁩ ⁨hours⁩ ago

        Insufferable.

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• remon@ani.social ⁨5⁩ ⁨hours⁩ ago

  Well yeah, because the sail is not needed at all, you just need the fan.

  A jet engine is just a very powerful fan anyway, so nothing else is needed.

  The sail would just be a very inefficient reverser.

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  • gastroglizzy@piefed.social ⁨5⁩ ⁨hours⁩ ago

    Yeah, so inefficient as to be completely ineffective. In other words, “it doesn’t work”.

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    • remon@ani.social ⁨5⁩ ⁨hours⁩ ago

      No, it’s not completely ineffective, just very ineffective.

      If you blow enough air a sufficient sturdy sail you can absolutely generate trust from the airflow the sail deflects.

      But you’ll be more efficient if you remove the sail and just point the fan in the other direction.

      You’d be even more efficient if you put the fan under the boat and push the water instead of the air.

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