^ Flettner Rotors @ the Buckau in 1925 – Image Courtesy of the U.S. Library of Congress at https://en.wikipedia.org/wiki/File:Buckau_Flettner_Rotor_Ship_LOC_37764u.jpg
Back from the Dead
Perhaps the one thing that separates the common from the extraordinary is the undying relevance of the work of the latter. German aviation engineer and inventor Anton Flettner is one such outstanding individual.
Way back in the 1920s, he devised the rotor sail and built two fullscale rotor scales – the Buckau and the Barbara. These were perhaps the earliest applications of wind assisted ship propulsion i.e. ships wherein wind propulsion usually plays a largely subordinate role. Read More