Caco -
there's a lot more theory than practical knowledge about this subject, thank goodness! Remember that the only 'stability' in a helicopter is a partial one in yaw, solely due to airflow over the tail pylon in forward flight. I'm talking about a machine with no artificial stability assistance. The Robinson does not have much of a surface area to its tail pylon, like many other helicopter designs, so it is probably not possible to keep it even half cocked in one direction with a tail rotor failure. The more surface area there is behind the rotor centroid compared to that in front of the centroid, the better off one is, in theory.
Best have a chat with your instructor about that one! At least one has a fighting chance with tail rotor
control failure...Also think about flying inside the 'Deadman's Curve' parameters at low level, which cover the engine failure case in ideal conditions, without the added 'confusion' caused by a tail rotor problem.
In the hover, you should be able to cushion the touch down and you will probably decrease the rate of rotation but not stop it entirely before reaching the ground and any drift may cause the aircraft to roll over as will the chance of the undercarriage collapsing.