Looking at the default 747 after updating to SU9 beta, if I open the stall debug window, here is what I can read about the wing twist:
I do not quite understand the information shown about wing twist.
What is the "Add to tip twist"?
Where does it come from?
Why is the middle wing AOA negative? If the wing incidence is 2°, then it should be 2° more than the plane AOA (2.2°), and show 4.2° instead of -1.1°.
In a similar way, if the wing twist is -5°, then the left and right wing tip AOA should be:
Tip AOA = plane AOA + wing incidence + wing twist = 2.2 + 2 + (-5) = -0.6°
Can you explain this debug window?