Scivillage.com Casual Discussion Science Forum

Nearby Welland Canal opened couple weeks ago and today I crossed over it and saw a saltie with a couple of huge vertical funnels/tubes protruding from its deck. With a little searching I found out they’re called Rotor Sails and they are helping decrease carbon emissions. Whoever thought of it is a genius in my book, using the Magnus Effect to help the environment.

https://www.norsepower.com/technology/

Here's a mildly longer vid (still under 5 minutes).
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"A rotor ship is a type of ship designed to use the Magnus effect for propulsion. The ship is propelled, at least in part, by large powered vertical rotors, sometimes known as rotor sails. German engineer Anton Flettner was the first to build a ship [1920s] that attempted to tap this force for propulsion, and ships using his type of rotor are sometimes known as Flettner ships."

Rotor Sail Explained ... https://youtu.be/FJt8l80kGTg