Helicopters
On 10 December 1989 the first human-powered helicopter, the California Polytechnic State University Da Vinci III, flew for 7.1 seconds and reached a height of 20 cm.
The current world record for human-powered helicopter is held by a craft named Yuri I, built by a team from the Nihon Aero Student Group (NASG). In 1994, it achieved a height of 20 cm for 19.46 seconds unassisted and unofficially reached 70 cm during a flight lasting 24 seconds. In 2012, this was unofficially beaten by engineering students at the University of Maryland with their Gamera II craft.
Read more about this topic: Human-powered Aircraft
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