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I think I will have to try a sheet of plywood on t he roof of my car, with a couple of video cameras and a acrylic panel under the model, so the tufts on the bottom can be seen. Pocket HD video cameras are $100 each, and a sheet of plywood is about $50. The speed is not realistic for a quarter scale model, but the general air flow on the surface should be realistic.
A full sized shell will cost about $1,000 or so... I'd rather do that with my money.
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