10 or 11 in a Panzer, but the last 5 or so were when I had no engine, no turret, and no tread - a couple of planes faceplanted and some M-3s were strafed with my forward hull gun before doing rollovers off the ridgeline.
Most I've actually landed were 6 in a FW190A8 with the four 20mm and two 17mm load-out. 2 were clean bounces from behind, 3 were snapshots while buzzing through the baitball, and 1 was a victorious HO. I still had ammo, but by then I was getting low on fuel and rtb'd.