For use on particularly calm days

How to move a boat without an engine, paddles or sails | NetworkWorld.com Community

Pitt researchers said that in their experiments, an electrode attached to a 2-centimeter-long “mini-boat” emitted a surge that changed the rear surface tension direction and propelled the boat at roughly 4 millimeters per second. A second electrode attached to the boat’s front side served as the rudder.

OK, maybe they can get that up to many centimeters per second. I for one would not like to be in a boat whose engine had a maximum speed of less than a knot.

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