Funny how you complain about me not having "facts and data to prove it", yet you pick out of all the sorties that I flew on that mission that evening ONE and without further information about the flight you go: "Yup, this must be the one that he was talking about". FYI, the sortie I was referring to was the one where I DIDN'T get shot down and landed back at the airfield, because after being chased by an Il-2 for about 4 minutes without being able to outrun him, we DID manage to shoot him down eventually (had a friendly 110 with me who did most of the heavy work since I was out of 20mm). It just took a whole lot of effort to do so because of how many insanely tight turns he was able to pull with this 4,5 TON HEAVY aircraft. (The "damaged - 0,1" you see in the flight log is me shooting him with my puny 7.92mm)
Did you even test it yourself? Did you, like I suggested go into a Quick Mission, with minimal fuel and tried the Il-2 yourself? Well if you did you wouldn't try to defend its flight model.
I can't be bothered to edit together a bunch of replay files just to prove my point to you when you can have a first hand experience yourself (mainly because I am too lazy and have no idea how to edit a video or replay file for that matter).
So I just tried it again (and I also realize now that I did a mistake in my original post, it should say 180° turns, not 360°!!, apologize for that) and by doing the good old 1-Mississippi-2-Mississippi I came close to my original turn times. About 4,5 seconds for half a circle. I then even went ahead and tried the same thing in the Spitfire IX, you know, that quite agile WW2 FIGHTER plane. Alas, It took me sometimes even longer to perform my turns, between 4-5 seconds, and that was after many times of stalling the aircraft and spinning to my demise because I was pulling too hard because I was trying my best to beat my turn time in the Il-2, you know, that 4,5 ton heavy GROUND ATTACKER.
Both tests (if you could call it that) were performed on a Moscow winter map on the deck, using flaps. Not only does the Il-2 manage to complete a full circle faster than the Spitfire (9s for one whole turn), thanks to its very high wing load it stays extremely stable during that turn and can continue on into another turn after completing the first, whereas the Spitfire takes about 9-10s (sometimes even 11 when I was pulling too hard), starts to become unstable and shaky and will have lost so much energy that you wouldn't be able to continue into another turn, not without faceplanting into the ground. I started my turn in the Il-2 at 450kph and left it at about 250kph, I started my turn in the Spit at 260mph and left it at about 160mph. Now at speeds above 280mph the Spit WILL turn faster than the Il-2 (your pilot will also black out) but let's be realistic, if you were doing dogfights on the deck you wouldn't go into your turns with 280mph or more, unless you had meteor engines strapped to your fuselage.
Since you are talking about "data" here, could you kindly provide me with historic flight data, that shows that the Il-2 was in fact a better turn fighter than the Spit, a plane almost half the weight. If you can do that, I'll shut up about the FM and I will praise the devs for the historical accuracy in their game and for having taught me something I didn't think was possible.