Think the problem really revolves what you can show a student when flying
Yes you can stick the pedals to try and represent a failure but you cant stop it turning ! As one of my customers who had a blade pitch horn failure you cant simulate the massive vibration, banging round and the smell of fear !!!!
Does puuting full right pedal ( US machine) in the same as having no tail rotor turning ? Would love to know what thrust the tail rotor actually gives for say every inch of pedal movement ie full right pedal is 10% thrust etc etc