Ad: This forum contains affiliate links to products on Amazon and eBay. More information in Terms and rules
My complete guess is the 109. Just another to throw in the mix is the F6F.
world's only female aces: Katya Budanova, with 11, and Lydia Litvyak (11 plus three shared).
i just started looking and found ~ 275 mustang aces (<<< not from a book but websites..sorry... not sure if that counts RAF pilots or not..or if there was an RAF pony ace ). if i have time i will look at other ac tomorrow
But how many gained their 'ace' status only on the 51? Lot of pilots started on 38s or 47s and then transitioned onto the 'stang.