21 May 1944.
Erich Hartmann flying Me-109G near Bucharest.
Hartmann shot down two P-51s without difficulty then evaded the other 8 P-51s until his Me-109G ran out of fuel, forcing him to bail out.
IMO this engagement nicely sums up the strengths and weaknesses of Me-109s vs P-51s. The Me-109 sacrificed internal fuel capacity to achieve an excellent power to weight ratio resulting in superior aerial performance. Just hope the battle doesn't last long or take place far from your airfield.
Hello Dave
Sorry to say, but on 21 May 44, there was no USAAF raids around that area, no Hartmann' P-51 claims and no 15th AF Mustang losses, so it is no use to make any conclusions on that story.
Juha