Went back thru my old Black hawk notes (1988!) and it said that the side lift from the cambered fin helps unload the tail rotor at approx 100knts and above 100knts (approx 120) flight with loss of t/r should be possible? and that was from Sikorsky instructors ,when I saw the 92 had no camber on the fin I thought it must be
A: the loss of t/r drive was so remote it wasn't needed or
B: it wouldn't matter how big the camber or fin size was it wouldn't stop the a/c from spinning.
Thanks for your insite into the fins on BH John.