Its July '43 that the F6F shows up. 100 a month. If your in bad straights, and you have a good supply of F4U's in your pool, move a Fighter group from the Cv's to land base for a turn or two and they become F4U's. Then put em back on the CV's. Ok, maybe its not so fair. BUT the e-mails of hate you will get from your PBEM when he encounters F4U's out at sea is priceless. ;)