Norman
Well-Known Member
I remember reading somewhere that slightly thickening the elevator can help the boundary layer to stay attached at high deflection angles but I don't recall any rule to decide how high this bump or step at the hinge ling should be. I assume that this height would depend on the boundary layer thickness. Most of my technical books are in taped up boxes right now so I can't look it up. This drawing shows what I remember of the technique but not to scale. I can figure out the boundary layer thickness so what I need is some ratio to determine what the skin offset should be relative to the boundary layer thickness. Anybody ever done this?
