Hi! This is my problem with FDE:I have rather heavy plane with FDE derived from 744 but I would like to tweak it to be much more STOL...for example to shorten its departure length in a half?Which exactly aircraft.cfg/.air parameters should I start to tune?I have to mentions: this is an AI aircraft not flyable one.

Try increasing engine power in aircraft.cfg file for that plane. Probably the best way is to reduce the setting for the inlet_area, or if that doesn't prove effective enough you can also try increasing static_thrust. Or you can instead increase the thrust_scalar. Also the engines will spool up quicker if you increase the fuel_flow_gain figure, this doesn't make the engines more powerful but they respond quicker to thrust settings. (TurbineEngineData)fuel_flow_gain = 0.002 (increase for faster spool up) inlet_area = 60.0 (reduce for more power) rated_N2_rpm = 29920static_thrust = 56750 (or increase for more power) afterburner_available = 0reverser_available = 1[jet_engine]thrust_scalar = 1.0 (or increase for more power)

Thanks Charli, I will try this.Nice, I don't have to make mess in .air file!