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. == Development == The Gamera II is a quadrotor helicopter purpose-designed to attempt an official flight duration record sanctioned by the National Aeronautic Association, and is a step in the progression of designs built to meet the criteria of the 1980 American Helicopter Society Igor I. Sikorsky Human Powered Helicopter Competition.

Source: Wikipedia — University of Maryland Gamera II (CC BY-SA 4.0)