Three Czech Republic companies have collaborated to invent and build probably the World's first prototype electric bicycle helicopter. I am not making this up!
Technodat, Evektor and Duratec's prototype uses 6 battery-powered propellers/rotors? for lift-off. Weight of the prototype rotorcraft is 220 pounds, (no RC model helicopter this). A recent demonstration ride/flight of 5 minutes was remotely-controlled with a dummy aboard, no doubt for safety. The companies hope to have a advanced model by this fall. Price of any production model?-Unannounced.