Originally Posted by
rickair7777
There is no regulatory basis to fly humans without a pilot on board. It's going to be a long slog to get there, and the technical part is only the beginning.
And the passengers would need a lot of persuading before they would ever get on a pilotless aircraft. That will have to start with freight.
Problem is always going to be battery weight. Electric power is very reliable and with several rotors instead of one big one they can be small diameter and rigid designs which are much simpler. Counter rotating with no need for failure prone and fragile tail rotors, and without the dissymmetry of lift and retreating blade stall concerns the craft should be tough and simple.