Many large freight ships are in the process of having rotor sails installed [1]. A rotor sail is basically a circular mechanism that uses the magnus effect to s

Many large freight ships are in the process of having rotor sails installed [1]. A rotor sail is basically a circular mechanism that uses the magnus effect to spin and generate propulsion. [1] https://www.hellenicshippingnews.com/norsepower-unveils-first-tiltable-rotor-sail-installation-with-sea-cargo-agreement/ https://www.hellenicshippingnews.com/norsepower-unveils-firs...