I managed to do it once as well. I was in a P-38J, turn fighting with a 190D. Was RTB'ing for ammo(30 .50 rounds, and no 20mm's). Turned inside him, and got to D100, and cut loose with the rockets (had them for the town, which was down, and everything I could kill on base was already down). Just barely hit the tail, but blew it right off.