And the Hind and the Hip have had flipped tail rotors!!!
It's better to had a pusher tail rotor so that the high pressure air is not impacting on the vertical fin. However, manufacturers sacrificed this when they realised they had to solve problems with a tail rotor where the FRONT tail rotor blade goes down through a downwards flow from the main head. The rear blades are not in the same flow.
It's easier to reuse the same tail rotor and flip the gearbox, rather than redesigning the whole tail rotor and keeping it as a pusher.
The critical bit of flight is left sidewards flight for American turning heads. The tail rotor can get into vortex ring and the foward tail blade up setting helps. Buy Prouty's book off amazon as it explains it much better than me.