These tweaks are specifically for SF2, as is my Cold War prop package that was done about a month ago - I've also tried running a few of the WW2 types in FE2 but the results were inaccurate (the Corsair F4U-5 for example has a realistic top speed in the 760s kph in SF2, but when dumped into FE2 it jumps into the 880s kph - so I don't recommend transplanting data inis across FE2 and SF2 - better to tweak things separately for the two sims)....
Apart from the Corsair and one or two other types, I haven't tried running any of the other SF2 aircraft in FE2, the Corsair showed up just fine but the FM modelling is way off when I run it in FE2....I think air density among other things is modelled to be "thinner" in FE2...possibly something TK did for more accurate WW1 biplane behavior...this would explain the difference in top speeds across the two sims....also the fact that I usually need to use higher-than-historical hp ratings in SF2 for the prop types to get fairly historical climb rates...in FE2, even when using estimates, the hp ratings end up fairly close to historical values, and sometimes require even a bit of down-tuning so that climb rates aren't too good/inaccurate.
Some of the 1930s biplanes that Geezer and Baffmeister were working on were done specifically for FE2 I think, and then eventually re-tweaked for SF2 - on the other hand "backporting" stuff from SF2 into FE2 may not be as easy. Obligatory screenies below, Aircobra and Tomahawk in the pto theater - SF2 is thoroughly satisfying for my occasional WW2 interests, much better than that CFS3 stuff I tried years ago.
Von S