LouW,
I've been building a 1/6 scale turbine U-2A for the past 3 years. I've had some concerns about the aerodynamics of the high aspect ratio wing. With a wingspan of 160", root cord of 23" and tip cord of 6", I worry about tip stall. With advice from another modeler/engineer I've come up with this: A turbulator strip(3 layers of trim striping tape,1/8" wide) about 5% aft of the leading edge on top on the outer 1/4 panel. The ailerons are 30" long so I'll probably cover this area. Your comments, recommendations? Jack

Here's the wing sections: