Lack of left turning tendencies
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For everyone that wants a hefty left yaw on that aircraft could test the following settings in the configs, until there is an official fix from BlackSquare:
engine.cfg
ThrustAnglesPitchHeading.0 = 0, -6Flight_Model.CFG
rudder_engine_wash_on_roll = 0leave all other parameters as is.
Have fun with lots of right rudder.
Cheers
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@Black-Square is this issue going to be fixed in the next update?
@Buzz Yes. JayDee and I appear to have discovered that the ThrustAnglesPitchHeading parameter is interpreted drastically differently between MSFS 2020 and 2024, which has led to some of the confusion. As nobody else has mentioned this on the developer forums yet, I'm hesitant to declare it yet another undocumented change in MSFS 2024, but most aircraft in MSFS don't make use of this parameter at all. The identical values from JayDee above, which are reasonable in MSFS 2024 produce completely unflyable results in MSFS 2020. Without understanding for this disparity, it appears I will be publishing the update with two different values in the two simulators, which is something I like to avoid whenever possible, because you never know when a sim update might break (or reintroduce) parity.
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@Buzz Yes. JayDee and I appear to have discovered that the ThrustAnglesPitchHeading parameter is interpreted drastically differently between MSFS 2020 and 2024, which has led to some of the confusion. As nobody else has mentioned this on the developer forums yet, I'm hesitant to declare it yet another undocumented change in MSFS 2024, but most aircraft in MSFS don't make use of this parameter at all. The identical values from JayDee above, which are reasonable in MSFS 2024 produce completely unflyable results in MSFS 2020. Without understanding for this disparity, it appears I will be publishing the update with two different values in the two simulators, which is something I like to avoid whenever possible, because you never know when a sim update might break (or reintroduce) parity.
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Thank you Jaydee for posting this!
I've been playing around with this, mixing it with the prop_mod_moment_scalar_yaw setting. I'm currently using -4 for the Thrustangle and 2 for the prop moment.
Increasing the prop moment scalar will also increase the "left turn tendency", but will make the aircraft unstable with higher values. By mixing the two, you can tweak how responsive the aircraft is/feels to torque changes.Also worth trying is turning on CFD_ReinjectVTailX and CFD_ReinjectRotors in the flightmodel.cfg. Without this the aircraft will start turning left more, with increasing speed, during the takeoff roll (with the same engine torque). Requiring increasingly more rudder input during the takeoff roll. This seems incorrect, since the rudder effectiveness should increase with increasing airflow, requiring less input.
During rotation it should increase again, because of higher AoA / P-factor increasing.
I haven't had enough time to test this, but it seems to work better with these two settings on. -
Without playing around myself, I definitely don't recommend using raw engine pitch/yaw angle to impact left-turning tendencies. This can have other relatively drastic side effects like how well the plane stalls, handles slow flight, etc. My countdown is a further 4 weeks until I can truly spend some time tweaking the sim, myself, though there's the possibility I could do some playing around this weekend.
Just to clarify, most aircraft IRL would use a positive heading adjustment for an engine with a naturally left-turning tendency to help combat it. Setting the heading to -6 just artificially induces left-turning due to the engine being angled to the left.
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It also causes you to maintain rudder input at cruising speed, where the plane normally is balanced out.
But if you try to get the same result with the prop_moment scalar, you'll need higher settings of around 15, which makes the plane instabile on the yaw axis, noticable when you turn the AP on.
That's why i was trying a mix of both settings and increased P-factor. -
I still have this problem with the cargo variant. It's like it was never fixed in the last update. Left rudder for takeoff and then a lot of left rudder trim during climb. The passenger version seems to be fixed even if I think the slipstream effect should be much greater.
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I fly the cargo variant more than any of the others and I do not have that left rudder on takeoff issue. I actually think I'm going to start leaving a few turns of right rudder on the trim wheel instead of centering it before every flight.
@jmarkows said in Lack of left turning tendencies:
I fly the cargo variant more than any of the others and I do not have that left rudder on takeoff issue. I actually think I'm going to start leaving a few turns of right rudder on the trim wheel instead of centering it before every flight.
I might have messed up when I installed that variant (using an old installer etc.) then. I'll check tonight.
