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Old 05-06-2008, 01:12 PM   #9 (permalink)
tasdrouille
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Location: Mirabel, QC
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The Guzzler - '08 Hyundai Elantra GL
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Quote:
Originally Posted by apgrok1 View Post
So why can't you put steps on the back window? I brought up this topic before and was shot down due to flow separation. It looks to me that anything that has more than a 12 degree slope should have a step or tail.
I completely agree with you. Most cars can benefit from a properly designed lip spoiler / tail, and steps, it's all the same principle.

One thing that is based on the same idea as tail disks someone could try with a pickup is to place vertical plywood sheets every foot that would be shaped like the skeleton of a tonneau cover. At that point you might as well just cover it up, but it would be interesting to see the results.

I thought about the boat tail disk idea a while back when I was reading on the forward facing vertical splitters they put on big rig trailers, and the tailgate up for pickups, which create pockets of air the rest of the flow can slide on.
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