Human-Powered Helicopter: Straight Up Difficult SKUNK BEAR

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Read the full story here:
http://www.npr.org/2012/10/14/160670295/flight-club-human-powered-helicopter

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It's difficult to build a working four-rotor helicopter that spans 100 feet and only weighs 80 pounds. It's even harder when your engine is a 0.7-horsepower person. But one team of engineering students is trying to do just that.
Produced by
Maggie Starbard
Correspondent
Adam Cole
Senior Editor
Ben De La Cruz

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