BTW, your analysis of the small flap at the bottom is just plane wrong, I have recently done a lot of CFD work on just this subject for the A-Cat
Great ! Lets get into it. How did you model it, how was the flap modelled, what approximation routines did you (or the software) use. How did you model the wind flow. What variances did you use, if any. Does the software allow stochastic modelling at all or just lab style deterministic models.
Can you intepretate the data for us, as in explaining why the flap works when the flow detaches from the round mast section before it reaches the point where the sleeve seperates from the mast tube. This detachment is broadly documented in a score of scientific publications.
I'm really interested in being proven wrong cause that is the way we learn and progress design.
I'm also aware that no single person (including myself) can cover a whole field in engineering like aerodynamics. There is just too much detail there.
If I make a mistake here then I want to know about it.
Wouter