Quote:
Originally Posted by ChazInMT
If you're referring to the 2 tufts on the back, they're stuck on themselves. They look the same in both pics. Did you read the article? Where are they wrong in the article and why?
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According to Hucho,the tuft study fails to reveal the longitudinal attached vortices spinning off both sides of the back of the Beetle which produce the downwash which allows the tufts to remain attached at the longitudinal mid-section of the car.The attached vortices are induced drag which doesn't show up visually but does explain the Cd 0.39 vs Cd 0.21.
It's an example of what we can expect when we exceed Mair's 22-degree limit,which historically remains a universal constant.