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Look up "Scaling Theory" for more info. It's been many years since I studied aero-d, so I forget the details at the moment. [b(] I would need to dust off my old college textbooks. But it sounds like mathman, stingray, and enigma are on the right track. Smaller-scale models are frequently used (wind tunnels, etc.) and there is always some loss of accuracy compared to a full-scale application.
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