Long time ago, must have been 2008, me and my friend tried P-51s on WarClouds, in an attempt to survive as long as possible.
Not counting those hit enemies that landed, I had a pretty good tally of 57 when I finally died. Could have survived longer but in the end was killed by the usual thing: greed. 2 minutes of mission time left I dived to deck to save a friendly only to end up below 5 or 6 Doras from a Czech squad and ended up killed in the cockpit by Werner.
Needed hell of a patience to get that far, but I believe the relatively weak firepower that made one pass kills difficult was less restrictive than the ability to outrun every enemy plane was helpful.