Bill,
Is there any way that you (and all these other engineers) can put all this stuff into lay terms so the rest of us can understand it? As somebody already mentioned, it kind of excludes us normal people when you guys go into all this technical jargon.

I'll bet that if I understood what you were saying about vortices and spanwise flow, I could capsulize it in a sentence that people could understand. Unfortunately, I don't understand.