You can have collective pitch setting in a quadcopter, with which you can scale up quite a lot without having to go to full cyclic pitch control (helicopters).

You can have collective pitch setting in a quadcopter, with which you can scale up quite a lot without having to go to full cyclic pitch control (helicopters). So basically it's a spectrum of scale: 1) fixed pitch (small quads) 2) collective pitch (large quads, autogyros) 3) cyclic and collective pitch (real helicopters)