For those who are into biplanes, Steven Myers did a couple of real winners: the Davis D-1-W and the Fleet Model 2 (aka PT-6 in USAAC usage). They are nicely modeled birds and work very well in FS9 (originally done for FS8). The Fleet Model 2 has an issue with the start up, but I have it dialed in so that the plane starts up just fine now (though it still has a very strong forward jerk on start up). I will attach the revised aircraft.cfg file to this post. Just rename it to remove the .txt from the end. The Davis D-1-W also has a start up issue, and it can be fixed by simply adding the below pasted line to the GeneralEngineData section of the aircraft.cfg file.
min_throttle_limit = 0.025
OBIO
min_throttle_limit = 0.025
OBIO