You didn't knock a piece of the wing off then. Probably got an aileron. Use zoom to check on these sort of things before you make any assumptions. And yes, the other guy was right, if you can hold a gun solution on him, shoot until it goes pop, just to be on the safe side.
As far as dominating goes...sims are harder to fly than airplanes even without the combat part thrown in. You could probably throw a WWII fighter ace in here and he'd STILL have a steep learning curve learning what a given maneuver LOOKS like and "feels" like on a computer monitor, how gunnery is going "look", and the quirks of whatever particular sim he ws flying.