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starwolf avatar image
starwolf asked FlyingRaccoon answered

How to set the effect of propeller reverse rotation

Hi,

I am building a single-engine aircraft with propeller rotation in the left-hand direction (cockpit view), which seems to be relatively rare.While using new propmodel,by setting the “prop_mod_reverse_centre parameter”, I adapt the propeller rotation. However, the behavior of the aircraft, such as the yaw behavior during takeoff, is the same no matter how I set it. I would like to ask if this parameter is set correctly or if there are other parameters involved in the control. Thank you.


aircraft
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FlyingRaccoon avatar image
FlyingRaccoon answered

Hello @starwolf

If prop_mod_use_modern is set to 1, then prop_mod_reverse_center should be enough.

Have you tried using the debug Sim Forces view or Debug CFD to debug your aircraft behaviour?

Regards,
Sylvain

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starwolf avatar image
starwolf answered

Thank you for the reply!

I have tested several times with prop_mod_use_modern is set to 1, and prop_mod_reverse_center set 0 or 1 .In Debug CFD the airflow did reversed with the setting . and it does have effect when in the air.

However, when running take-off on the ground, the plane yaw to the left regardless of the prop_mod_reverse_center setting (even with the high yaw scale ).

Any other suggestions please?

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FlyingRaccoon avatar image
FlyingRaccoon answered

Hello @starwolf

Ok, here are some additional possibilities:

- Check the ThrustAnglesPitchHeading parameters in the GENERALENGINEDATA section of your engines.cfg. Sometimes, a heading angle is set to compensate for the yaw tendency.

- Check the engine_wash_on_roll parameter in the FLIGHT_TUNING section of your flight_model.cfg. When CFD data reinjection is disabled, this is used to tweak a "fake" propwash effect. It compensates for roll when you're flying but on the ground, it has a big influence on yaw. You can change the sign of this parameter if you have set it to something else than 0.

Let us know if that solves your problem.

Regards,
Sylvain

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