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c172p-team / c172p

A high detailed version of the Cessna 172P aircraft for FlightGear
GNU General Public License v2.0
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Rudder trim: Lever travels too much #1515

Closed hbeni closed 1 month ago

hbeni commented 3 months ago

-1.0 / +1.0 are the normalized maximal values for full deflection. The lever has 90° then.

hbeni commented 3 months ago

I assume this is hard wired in the FDM somewhere. 0.18 is max rudder trim, and we need only a bit of rudder to counter that. Probably this is right, but I cant tell for sure.

I detected this when testing my joystick, where I was able to override the models rudder trim quite a bit.

wlbragg commented 3 months ago

If you want to adjust it to what you think or specs indicate, by all means go ahead. I added the "optional" rudder trim component and I am sure I did not look at specifications for travel of either lever or the rudder.

hbeni commented 3 months ago

Filed a PR that just limits the rudder-trim. Not changed the FDM trim effect as I can't tell if this is realistic. It may also not be the "correct" solution, but currently works "good enough".

The C182 allows for rudder trim travel of -1.0 to 1.0, but I didn't find any signs of some conversion for the FDM, or where the trim's effectiveness is defined (another option would be to convert the property to read -1.0 to +1.0, and adjust the animation, and reduce the effectiveness by a corresponding factor.

wlbragg commented 2 months ago

Yeah, the only thing I would question is filter VS FDM? It may be the correct fix regardless. @dany93 are you still around for comments on this? If we don't hear from @dany93 I will go ahead and merge this. Thanks for working on it.