bugmenot,
So it would appear at sea level the 109 is too slow by at least 30kmh. However I felt that IL2:clod used the new supercharger as the Ata does not drop off untill higher altitudes which seems to match the new one. So essentially its even SLOWER than it actually should be! The new compressor gave the 109 a higher effective cieling before the Ata dropped off and therefore made it faster at a slightly higher altitude.
Are your speeds in TAS?
I also found this which was of worth:
http://www.ww2aircraft.net/forum/fli...mki-26994.html
So we know all the aircraft are too slow and roughly by how much although I have not seen a through test (video) which shows values for RL and clod but I believe they have been done by some trust worthy people... Having this info here in this thread would be nice.
However:
What about climb, dive, turn and roll? Speeds are one thing and need addressing but are not these more fundamental? Especially from the perspective of a Hurricane pilot who are being overshadowed by the spits?