Barco que se move sem motor ou velas

[Lápis Azul]

Será disto que o povo fala?

Calypso II, de Jacques Cousteau

HISTORICAL NOTE: In the early 1920's the force from a rotating cylinder was used to power a sailing ship. The idea, proposed by Anton Flettner of Germany, was to replace the mast and cloth sails with a large cylinder rotated by an engine below deck. The idea worked, but the propulsion force generated was less than the motor would have generated if it had been connected to a standard marine propeller! Here's a picture of the ship provided by Brian Adkins, BAE, Georgia Tech, 1993.

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