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Old 05-10-2010, 04:55 PM   #3 (permalink)
Otto
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Quote:
Originally Posted by tollo View Post
Here is some discussion:

http://ecomodder.com/forum/showthrea...ers-12997.html

- I agree with you that two sides is better than one.
- Inside covers can be mounted to wheel (like outside) or also to hub.
- Notice the brake cooling.
- Front suspension system (arms and so on) need quite lot of space
- covers are more important on the outside, because smooth side of the car.
- quite small gains but also quite easy to do ?

Are we talking about the same thing ?


Essentially. Given the issues with ventilating the brakes and potential heat buildup of the wheel, I suppose it would be better to have a flow fence at the outer edge of the belly pay undertray, just inboard of the wheel assy..

A week or two ago somebody posted a great pic from Hucho of an Opel Cailbra in wind tunnel, showing the smoke trail diverting ~60 degrees off centerline and outboard, then hitting the front wheel at an angle. I cannot seem to find that pic, so wish somebody would link or repost it.

Anyway, that lateral flow robs a lot of energy from the car, esp. given the concave and sharp contours of the inboard side of the wheel/tire.

Trick is to make a fairing that smoothly diverts such lateral flow air around the front wheel/tire, yet allows adequate cooling air for the brakes.
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