-What allows the 31-year-old to defy gravity is sheer human power, delivered to the craft's four rotors through the bicycle pedals he steadily pumps throughout his flight. -It's that fragile machine, built by Reichert's Canadian team, which has now won a long-coveted international prize that lay unclaimed for years. -The winning hand-built helicopter — nicknamed Atlas — is huge, measuring nearly 47 metres across, but also surprisingly light for its size, at just 54 kilograms. Source: http://www.ottawacitizen.com/news/P...+team+builds+human+powered/8647839/story.html https://www.youtube.com/watch?v=syJq10EQkog"]Atlas Human-Powered Helicopter - AHS Sikorsky Prize Flight - YouTube