DragonflightDesign
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Code:
[flight_tuning]
rudder_trim_effectiveness = 1.0
Code:
[flight_tuning]
rudder_trim_effectiveness = 2.0
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aircraft.cfg - rudder_trim_effectiveness
- Thread starter DragonflightDesign
- Start date
Yes, that easy 
As I explained in post-2 of your "Aileron Trim Limits" thread.
That is (nuance):
You can approximate the proper FDE working of the rudder trim tab, by changing the rudder_trim_effectiveness to a good value.
But that doesn't mean that rudder_trim_effectiveness =2.0 gives the correct, realistic flighteffect of the rudder trim setting.
Although it will probably compensate the fixed 10-degrees angle of the rudder trim tab fairly (assuming the relation is lineair).
But that still doesn't mean it gives the correct flight effect.
For that, it would require that in FS you are also able to define position and surface size of the trim tab (not just angle), which would be different for each aircraft.
And (as far as I know) that's not possible, and hard-coded in FS too.
That's why rudder_trim_effectiveness (and other *_effectiveness setting alike ) are there for in the aircraft.cfg: so you can tweak it to get to most realistic effect.
So a value of 2.0 would compensate the improper and fixed angle value, but I'm 100% sure that this isn't the optimal value for a B-314.
To establish the optimum value achievable in FS, you would need to experiment; based on how the real B-314 behaves in real-life on rudder trim setting.
Hope you understand what I mean ....
Cheers, Rob
As I explained in post-2 of your "Aileron Trim Limits" thread.
That is (nuance):
You can approximate the proper FDE working of the rudder trim tab, by changing the rudder_trim_effectiveness to a good value.
But that doesn't mean that rudder_trim_effectiveness =2.0 gives the correct, realistic flighteffect of the rudder trim setting.
Although it will probably compensate the fixed 10-degrees angle of the rudder trim tab fairly (assuming the relation is lineair).
But that still doesn't mean it gives the correct flight effect.
For that, it would require that in FS you are also able to define position and surface size of the trim tab (not just angle), which would be different for each aircraft.
And (as far as I know) that's not possible, and hard-coded in FS too.
That's why rudder_trim_effectiveness (and other *_effectiveness setting alike ) are there for in the aircraft.cfg: so you can tweak it to get to most realistic effect.
So a value of 2.0 would compensate the improper and fixed angle value, but I'm 100% sure that this isn't the optimal value for a B-314.
To establish the optimum value achievable in FS, you would need to experiment; based on how the real B-314 behaves in real-life on rudder trim setting.
Hope you understand what I mean ....
Cheers, Rob
Last edited:
DragonflightDesign
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Thanks Rob. I wasn't sure if that was what you meant in the other post, hence the new one. Nobody knows how the B-314 actually behaved, so I/we are having to stick strictly to Boeing's numbers. The guy that did the flight dynamics has caught me in a couple of WTF? moments where I ended up thinking 'it can't possibly do that', only to find he was right on the performance curves. Unfortunately he's left the project, hence the open question instead of just asking him.
Are you saying the parameter in the [Airplane Geometry] section of the flight_model.cfg file named "rudder_trim_limit" is not used or is not what it says it is? This is in reference to MSFS and the new flight model. Based on the aileron trim thread, you may be asking about FSX or P3D?
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Gets confusing sometimes .... But this thread is also about FSX/P3D
No clue if/how it works in MSFS.