University of Maryland Gamera II

The University of Maryland Gamera II is an improved human-powered helicopter designed to win the US$250,000 Sikorsky Prize.

[3][4] The requirements to win the Sikorsky Prize include achieving a flight duration of 60 seconds and reaching an "altitude" of 3 m (9 ft 10 in).

The rotors are now tapered with a Selig S8037 airfoil and rigged with a 3° anhedral to compensate for coning so the blades fly almost level with the ground.

[8] One day later, on June 21, 2012, Kyle Gluesenkamp flew the Gamera II for an unofficial world record of 50 seconds.

[9] On August 28, 2012, University of Maryland freshman Henry Enerson flew the Gamera II to a world record height of 8 ft (2.4 m) above ground level.

Two of the three criteria prescribed to meet the American Helicopter Society Sikorsky Prize competition were achieved, with only hover height falling short.

[12][13] On June 26, 2013, the Gamera II set an unofficial world record for human powered helicopter endurance of 74 seconds.