Experimental Evidence of water craft that can obtain thrust from an opposing wind


The spinning business card
By Michel Le Gallic

Inventors drawing of how it works



Charles-Henri Viel

Charles-Henri Viel




Although these systems show that it is possible to completely overcome the headwind (using the headwind).

Even if the power is not sufficient to completely do this it does show that a suitably designed

rotor can aid the progress of a ship upwind because the thrust produced

by the rotor assembly is greater than the drag it creates.


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