Pedal Power | Flight Today | Air & Space Magazine

Pedal Power | Flight Today | Air & Space Magazine: "t was difficult to take in all at once: Four giant Mylar-covered rotors the size of windmill blades rotated, fishing line winding around a spool plinked like an untuned toy harp, and a vast, spidery structure trembled with the effort of a madly pedaling figure at its center. The pedaling figure turned the spool that wound the fishing line that worked the pulleys that drove the rotor blades. Late in the afternoon of May 4, 2011, no one was breathing in the University of Maryland gym."

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