Human-powered helicopters are hard to build  OCT 16 2012

A team at the University of Maryland are building a human-powered helicopter in an attempt to win the Igor I. Sikorsky Human Powered Helicopter Competition. To win the $250,000 prize, the helicopter must fly for 60 seconds, reach a momentary altitude of 3 meters, and stay within a 10 meter square. This is surprisingly difficult.

The NPR story that the video accompanies is here. (via ★interesting)

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