Toobuilder
Well Known Member
I have read penty here concerning the often dramatic difference the radius of the folded TE makes. But what I cant seem to find through a search is what the nature of the change is, aerodynamically. For example, a "fat" TE will produce a slightly convex skin profile, while a very sharp fold will produce a slightly concave profile. In the RV world, will a sharper TE tend to "fly" that aileron to a higher TE (creating a roll into that side) or will it fly the TE lower (rolling away).
I built a new left aileron (to eliminate the roll servo and tab) and flight test shows an aerodynamic servo action on the ailerons creating a right roll. If I center the ailerons visually lining up the TE of the flap and tip the airplane flies true. As soon as I let go, the aileron TE's jump to a pro right roll position of about 1/2 inch displacement. The airplane is mechanically rigged straight and the lined up TE's confirm. So I'm concluding that one aileron is flying the system off center like an aerodynamic trim tab.
Considering that premise is correct, to fix my right roll, do I need to sharpen the left TE or blunt the right?
My thanks
I built a new left aileron (to eliminate the roll servo and tab) and flight test shows an aerodynamic servo action on the ailerons creating a right roll. If I center the ailerons visually lining up the TE of the flap and tip the airplane flies true. As soon as I let go, the aileron TE's jump to a pro right roll position of about 1/2 inch displacement. The airplane is mechanically rigged straight and the lined up TE's confirm. So I'm concluding that one aileron is flying the system off center like an aerodynamic trim tab.
Considering that premise is correct, to fix my right roll, do I need to sharpen the left TE or blunt the right?
My thanks