At the time of finalizing this mod I used the already available FM that we should remember was conceived for an AI only plane. This FM is not really satisfactory and even the reference to the M-25 Series engine is historically wrong.
But in order to quickly made the flyable version available and minimize incompatibility with the previous version I kept the original FM. I also didn't had sufficient information on the engines actually used and the flying characteristic of this model. Moreover considering the very long service time for this plane (from the '30s to '70s) it would be quite challenging to workout an historically correct FM.
So user need to be patient and remember that AI never ever overheats. Let's say they have a very skillful engine management
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In BAT there is also a second M25Series.emd that has a TESPEED of 0.021