David McCampbell shot down nine japanese planes during the marianas turkey shoot.
As for the one day record, that is held by Emil Lang, shooting down 17 or 18 in one day.
Do you know how many sorties were involved. I know there were German 'Experten' who achieved high 'daily tallies', but I'm not sure what the highest was for them.
Is the 17 in a day, that you mention, the Allied record, or all time??

