Hey,
We don't have a wind tunnel, but Auburn University does. They helped us do some testing on the GeoBat model.
They also have a water tunnel. The model is built with tiny tubes in it where they inject dye and it gives almost a better effect than a wind tunnel. (These are the guys who also tested a flat plate)
Here is a Discovery channel segment on it. As well as a few pics
http://www.youtube.com/watch?v=WKiQqORDnJQ