Quote:
Originally Posted by forums123
Galane,
I really like your suggestion of the Angled Trail Skirts for big trucks and trailers with Dualies in the back. I have seen semi-truck trailers with those skirts on them and wondered what they were for. Orbywan, maybe you should try the trailer skirts to smooth flow the air around your back dualie tires?
Dave
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I just want to reproduce something similar to the photo of the smoke stream in front of the Calibra in Huchos book on page 183. That would take a huge amount of guesswork on so many of these shapes.
Thanks for the suggestion Dave. This brings up the guess and by golly thing again. If you look at the photo of the smoke stream going under the front end of the Calibra on page 183 of Hucho's book, he says that the air coming over the front and rear wheels can be diagonal anywhere from 15 to 60 degrees from the center. In other words, the air going under the air dam and then over the front tires of, in this case an Opel Calibra, is hitting the front tires and to a lesser degree, the rear tires at a 15 to 60 degree angle coming from the center. WTH?
That statement (and the photo backs it up) and the range of variation in the angle, kind of complicates the hell out of designing the shape of wheel skirts, or fairings. I'm going to order a smoke generator so I can run it on my rig in various places and record the results with the camera system, and hopefully find out exactly what the air is doing under there. Other wise it's like my grandma used to say, it's all by guess and by golly.