Pretty sure - I double checked every control surface I could think of (at the keyboard hardware level) ; this let me identify if I was inadvertanly causing this . ie hitting 'p' to release PARKING BREAK, and then double checking the same thing in the yoke settings - did not find any duplicates - I was also thinking maybe somehow the brakes got separated into LEFT and RIGHT releases. Not the case/
I found it completely strange, that upon take off, the drastic LEFT TURN coincides exactly with the SINGLE MAGENTA COURSE indication MFD - its a direct GPS track between START and DESTINATION.
I even tried loading a DEPARTURE airport ( CYEG) and no destination. Aircraft still did the same thing to a certain degree.
I also just found a reference to a setting in the aircraft.cfg file :
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Sept 25 2020 - Fix for plane pulling excessively to one side
If you have a hard time keeping your aircraft straight on the runway (or it pulls to the opposite side it's supposed to), adjust the value for engine_wash_on_roll in flight_model.cfg.
If its negative the plane will pull to the right, positive will pull to the left, and zero will make it go straight.
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Sounds like old school like I used to do, and this would obviously not be a reflection of the air modeling, but it is frustrating when you can no longer take off, when you could before, for really no reason for the change. Afterall, this is meant to be entertainment , not frustration.
I am guessing if I did a uninstall of MS2020. and then reboot, and reinstall, It would probably fix it....