[1] Components of the power train for that human-powered helicopter (pedals, cranks, pulleys, etc.)
were removed, and replaced with four electric motors, each connected via gearing to one of the craft's four rotors.
Four panels, each containing 40 monocrystalline silicon solar cells, were located at outboard end of the frames leading to the rotors.
[1][2] Electronic controls, which incorporated an stability augmentation system, helped to ensure stable hover.
[1] Testing commenced at College Park, Maryland in April 2015, but with no pilot aboard.