In 1980, the American Helicopter Society issued a reward of US$20,000 for the first group to build a human powered helicopter. The conditions of flight were to hover in a 10 metre square zone for a minute and reach a height of three metres. Since then around 20 unsuccessful attempts have been made on the feat and none have come close, with the most recent attempt on August 10, 2004 from the University of British Columbia having failed also.
« Back to Human powered helicopter grounded
Other Images from this Gallery