Human-powered helicopter

Updated: Feb 28, 2013 20:02 IST

Colin Gore prepares for a test flight in Baltimore. In order to win, a helicopter must fly under human power for at least 60 seconds and momentarily reach an altitude of 3 meters while remaining within a 10 meter square box. (AP)
3/7
Colin Gore prepares for a test flight in Baltimore. In order to win, a helicopter must fly under human power for at least 60 seconds and momentarily reach an altitude of 3 meters while remaining within a 10 meter square box. (AP)

top photos

other photos