Hi, I am building a large delta flying wing, and would like to angle the elevons slightly, to create a shape similar to a B2 ( though not that closely similar...). My question is, to avoid adverse effects, is it better to have the elevons angle back, so to speak, so that the chord where the elevon is nearest the center line of the plane is larger than the chord where the elevon is nearest the wing tip? Or vice versa? It seems to me in a turn, the down elevon would drag more, and therefore having the chord be larger at the center would create yaw in the right direction. I am clearly not educated in aerodynamics, but I do get the basics. Any help?

Thanks!!