F3 external view and you pretty much have to 'hide' the enemy plane behind yours from the check6 view and spray an pray.
luck only, no skill involved!
have to usualy take damage to even get a ping on someone, as you got to let them on your tail. cross snapshots work if you shoot eneough ammo at them, bombers are the best target. b17s will be easy to hit if you swoop under them and pull up right infront and spray away, although not so easy to kill.
its luck more than anything.
S!