What is the definining line between a helicopter and a drone a person can ride in? When I say drone in this context I don't mean an unmanned aircraft. I'm not sure what the terminology of a drone that has been adapted to carry a person? Is this picture below considered a helicopter or what? What if it ran on petroleum?


If not, then how is the separation between a VTOL aircraft and helicopter defined?

Would a Chinook that can fly itself be a drone?
A helicopter is an aircraft in which thrust and lift are provided by rotors.

A drone is an unmanned, self-piloted or remotely-controlled aircraft, which can use rotors to provide thrust and lift, but can also use other means such as propellers or turbines. 

To put it in simpler terms, a helicopter can only be a helicopter, regardless of whether it has a human inside or not. A drone can be any kind of aircraft.