I for myself don`t think that it is good to implement such thing as fatigue. If you simulate that, you then also have to simulate adrenalin, like GOZR said. Last weekend I and a few other guys from JG4 and JG5 had the chance to talk to Schäufele and Schuck. And on the question about fatigue Schuck only answered that you were in such an rush of adrenalin, you couldn`t be tired. Then how do you want to simulate that? Each person is different, the next thing that will be then afterwards is the discussion, that the Spit pilot can resist more then the 109 pilot and so on. Don`t forgett thous pilots were flying for their lives, if you fail you are dead (adrenalin in such situation).
@ BlitzPig I like to fly nearly all planes except the Spit. And I enter a turnfight whenever I get the chance, of course if there is a possability to win
I would never enter a turnfight with a 109E vs Rata