Are you the airfoil designer Selig????

OK, now plug in the fact that the left side of the vertical fin is getting more airflow than the left side when you run the engine up on a bench. What effect, if any, do you see here?
The airflow is obviously twisting around and landing on the vertical fin. I would assume the same airflow would exist during flight but is swept away except when you come to a wall.
Is the gryoscopic effect the same as torque? If so, then the model should turn left instead of right.
And, I would have to state that the twist occurs at small elevator deflections and not just at high deflections. It does, however, have to be sudden as used in a wall.
I have found that the problem can be eliminated with a cleaner entry into the wall but it is still a bewildering aerodynamic effect and unless you come to a complete stop, you are not in a wall, just a steep climb. That's where the wall name comes from. Slam!
Your thoughts on the matter are most welcome.

3dbob