Inside Out Library · ExploreThe "Magnus effect" - the principle of the Flettner rotor (1925)NASA Technical Reports Server (NTRS) · leaf 25^.A.CA. Tochnical Mcmorojiduai Nc. 310 Figs. 1,2 3 4 A … Fig. 3 Diagram of circulsiticnNASA Technical Reports Server (NTRS)Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.More pictures from The "Magnus effect" - the principle of the Flettner rotorMore like this