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A wildcard: Mosquito FB as a day fighter?
FW 190 and Bf 109G-1 and 2 have to be considered
Nope, it wasn't built to handle the high "g" turns. Not to say they didn't on occasion out turn an enemy aircraft.
The Spitfire IX - definitely.
The Spitfire XII - did this get into service in 1942. I think maybe it was 1943, not sure. First productionmachines delivered in October 1942, though?
The Mustang I/IA (II?) - would be up there as well.
And the P-38 was probably also in the top 3.
Is the Tiffy sufficiently sorted in 1942 to be considered for the top 3?