One such attempt was a military aircraft, the AH-56 Cheyenne, a helicopter with a weirdly elongated appearance dating to the late 1960s that also had wings as well as a propeller (and a tail rotor ...

Volocopter: 18-propeller electric helicopter takes flight Prev Next Art of Movement is CNN’s monthly show exploring the latest innovations in art, culture, science and technology.

An electric helicopter – powered by 18 propellers – has made its maiden flight. Could it be the future of urban transport?