
https://www.scientificamerican.com/article/rotating-sails-help-to-revive-wind-powered-shipping/
A century-old concept, Flettner rotors, gets a fresh look as shippers cut back fuel
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Original Title: Rotating Sails Help to Revive Wind-Powered Shipping
Full Text of the Original Article: https://www.scientificamerican.com/article/rotating-sails-help-to-revive-wind-powered-shipping/