I would have thought a fenestron failure at low speed is relatively simple to simulate, as the aerodynamic modeling is less complex than forward flight. It's simple physics. The Helisim EC155 always seem to behave in the manner I'd expect, and the stuck TR controls certainly replicated real world training with jammed pedals. One session will always stick in my mind, where the crew were given a TR drive failure in the cruise st 2,000 ft. They decided to do a handling check (on an aircraft that was basically still straight and level). Eventually they washed off the airspeed and the 'thing let go'. Unfortunately, we never reached any 'crash' parameters to 'red screen' and freeze. Conversely, I couldn't reach the stop button as I was hanging on to the grab handle. My colleague had been thrown on the floor from his jump seat and was covered in books and papers. It took a while before we hit the ground. Seemed pretty realistic to me!