Problem with the 39 is the flaps cannot be put down under 185mph, this means that you will reach your limit with turn circle long before ANY navy bird even hits 200mph, and by that time the navy bird will start dumping flaps, and will turn far better under 200mph, than the 39 could ever hope.
If you have +2 flaps or more out in a 39, you are already lights out when fighting any of the blue planes besides the f4f.
I fear nothing but navy wings when in the 39.