Yeah, maybe I need to wait until I see the white in their eyes, but that's what I play shooters for, not air combat games.
Probably shouldn't be playing a WWII air combat game then. Still, what plane were you using, and what were you shooting at? I know that a lot of the biplanes are rather undergunned (except for the russians), especially if you try to shoot down what bombers there are at that level.