I haven't looked at DokG's in awhile, what were the numbers for the N vrs the D-40? I know the N weights 650 lbs when both planes are loaded for the same flight ime (28 minutes, 50% for the N and 75% for the D-40) but one would think the larger wing and extra power on WEP could make up for it abit in a turning contest.
You know, I don't want to drag this too far off topic, but according to DokG's fighter website, even the 190 D9 turns a smaller circle* than the P-51 with flaps out...with its much higher wingloading and three notches of split flaps, as opposed to the the Mustang's maneuvering flaps. Anyone STILL think there is nothing screwy with the P-51's turn radius. *Yes, I realize this is not practical in actual maneuvering against Mustangs because the 190s flaps come out at such a slow speed, but still, interesting data point.
Did some interesting math based on DokG's turn radii too. Most planes seem to have there turn radii reduced by 24-26% by full flaps vrs no-flaps radius. This was the case with the Jug, and the 38, and the Fw-190 One would think that the Fowler flaps of the 38, which actually increase wing area, would be more effective than the Jug's, and certainly the 190s. Not the case in AHII apparently. The Corsair has gets a 40% reduction in turn radius through flap usage!
But the P-51's turn radius was only reduced by 19% with full flaps.