Originally Posted by Graviman
IFMU, the advantage here is that the pusher prop can be used to pull energy out of the airstream. The immediate advantage is a lack of need to drop collective and flare in autorotation from cruise. This also means that the main rotor does not have to be at flat pitch during autorotation, with forward cyclic, which allows good yaw authority. Coaxials can suffer from poor yaw control in autorotation, as the differential collective pitch does not transfer torque as when in level flight.
Mart, would you please provide your source(s) for these intriguing statements.
Dave