radiators have no influence on speed

[ACE-OF-ACES]

Originally Posted by David198502

i surprisingly just found out that the rads settings of the 109 have no impact on speed at all...
normally i fly with them as much closed as possible,to avoid engine overheating,while maintaining the minimum air resistance...
however i found out that one can leave the rads fully open and still reach and hold the top speed in level flight....

that should be looked into by the devs, cause i would assume that a fully opened radiator should cause enough surface to slow the aircraft down...

i have to say that this fact is extremely disappointing, as CEM and FMs are supposed to be the strengths of this game(sim?)

Well I would not jump to that conclusion just yet

Don't take this personal, but, based on past IL2 experience I found that most of the 'errors' in speed were due to the sim pilot, not the FM.

And it worked both ways

1) Guy says plane is too slow, graphing the data using DeviceLink it turned out the sim pilot was actually climbing (read not level flight)
2) Guy says plane is too fast, graphing the data using DeviceLink it turned out the sim pilot was actually diving (read not level flight)

Little changes in altitude like that can easily cause a +/-40mph error.. At least that was the case in IL-2 for sim pilots. A good example was back during the Ki-61 top speed topics, half said too fast half said too slow. Turns out the plane was fine it was the sim test pilot that was in error.

Now with that said, what real world data are you using as a reference, and what is the speed difference between fully open and fully closed? Ill bet if falls in and around the above mentioned error, thus until your able to log you altitude and speed and graph it, I would not jump to your conclusion.