British FM killing the fun of the game for allied pilots.

[ATAG_Snapper]

Hmmm, sounds that way, Dutch. Based on Tom's observations and your comment, it's like yes -- the correct FM's are there for all aircraft. It's as if CEM is correctly modelled (for prop pitch, at least) in the 109's -- hence their better performance with CEM turned on. The 109's prop pitch sounds incorrectly modelled when CEM is turned off.

A different story for the RAF aircraft though - the FM's are "fine" for RAF with CEM turned off, but hampered when CEM is turned on. In the RAF planes' case, it may or may not be the prop pitch modelling at fault, but perhaps more the Merlin horsepower setting that get pooched. Dunno. Someone else noted, that I concur with, is that the Spitfire's (all marks) acceleration and take off roll is way off. It takes forever to get up to rotation speed. (Just watch the A2A Wings of Power 3 Spitfire video demo on prop design/prop pitch that talks about just that. Better yet, fly the itself -- it's breath taking how fast the A2A Spit lifts off).

These are just a layman's observations. I have no documents on this, nor am I going to spend time on this trying to find any. Clearly there will be a chart or graph out there that will clearly show what I see with my own two eyes is all wrong, anyway. Except I'm not.