As long as the maneuver gives positive Gs on the machine, the type of rotor don't really matter. It matters when the Gs drop near, or below zero - doing Push Over, or Tail Slide in Robbies would result in loosing some parts (tail or main rotor), with fully articulated rotors - it would depend on the centrifugal force on the rotor - conning, or extensive flap, can result in blades colliding with tail, or other blades (co-axial in Kamovs). For example CH-53 should do fine in negative G, while Mi-8 will probably chop his tail off. At least that's what math say
