A Canadian built human-powered helicopter becomes the first machine to ever win the 33-year old Sikorsky engineering prize. 33 years ago, the American Helicopter Society launched its Igor Sikorsky engineering prize for human-powered helicopters. The prize, which comes with a check for $ 250,000...
Human-powered helicopter wins Sikorsky prize
Saturday, July 13, 2013
Human-powered helicopter wins Sikorsky prize
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