Professor Mark Drela created a motor-less hydrofoil known as the decavitator. He's using nothing but to turn this craft 10 ft 3 m air propeller, he got it up to 21 miles per hour and he's braking the human powered water speed in the process. Mark Drela created his pedel- propelled air boat called the "sea horse" with his own imagination and thinking. And also started building it on 2001.
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