Originally Posted by
Rob2160
Think it through.. Apply left rudder and hold left rudder deflected.
Now freeze the plane inverted. When the plane is inverted and has negative G - (that is the key - negative G) the rudder is pointing to the right side (viewed externally)
Another way to think about it.. If you built a plane with a rudder underneath and an anhedral wing.. and you flew that aircraft normally.
Applying left rudder in this plane the rudder would move to the left. viewed externally.
But in our inverted scenario, the rudder was left (viewed externally, when upright, but when inverted, it is now deflected right, viewed externally) There is a difference.
I am surprised you have fallen for that! Dihedral as viewed from the rudder is the same dihedral regardless of whether it is at a +ve or -ve AoA. Whether the plane is upright, knife edge or inverted is irrelevant. From the point of view of the rudder and yaw, dihedral is the same whether at a +ve or -ve AoA. Those of us who have flown circuits with a 3 channel model can confirm it!