Ah interesting.
I recently viewed all of the History Channel Dogfights series.
I have yet to try this maneuver, but after I saw that episode I have been meaning to try to "attempt" it in IL-2.
I can, however, tell you exactly what will happen in a P-51 in this game
One wing will stall out dumping me into an ir-recoverable stall / spin / tumble into the ground. Every time.
I will have to re-watch the episode, because I think I recall hearing the pilot interviewed describe this maneuver as something that he had practiced at least a few times before his miraculous shot in combat. I remember thinking "wow, when did these guys have time to get to altitude and practice hair brained maneuvers like that?!"
Maybe I can fly this weekend and try it out. lol Wish me luck...