It is deceptively simple really. A high wing-loading aircraft produces more drag in high-G turns due to needing a higher angle of attack to achieve the same lift. This means that in high-speed turns where both aircraft are limited not by lift, but by G tolerance, the high wing-loading aircraft is able to slow down quicker thereby being able to tighten the turn faster (Stang turning inside the Spit for example). If both aircraft keep a constant speed neither aircraft will be able to outturn the other (given the same G-tolerance), but WWII fighters didn't have the engine power to sustain high speed through high-G turns, and thus would slow down. The best turning speed of any aircraft is the speed where it is just barely able to generate max tolerated G. This speed is well below the maximum speed of WWII fighters and thus the plane that can slow down to this "best turning speed" the fastest is going to turn inside the other. However, as speed continues to drop the light wing-loading aircraft will gain the advantage as the game now turns to who can generate the most G out of the available engine power (i.e. sustained turn rate). This is why planes like the Fw and P-51 could outturn more nimble opponents like the Spitfire and 109, but the advantage was only at high speed and only as long as the fight didn't slow down to a sustained turn fight.
My $.2
I couldn't agree with you more! This pretty much answer the OP's question as well. Well done Die Hard.
I am also with everyone else.....This thread is a breath of fresh air. When you look at the majority of the posts are about whiners, squeakers, cheaters, Bish - Nit - Rook sucks ETC. this post is definitely very nice and i think that i will try to post more like this one to break up the whining posts. We will see how it works.
