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Old 10-24-2009, 10:23 PM   #29 (permalink)
Bicycle Bob
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Location: N. Saskatchewan, CA
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Appliance White - '93 Geo Metro 4-Dr. Auto
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The bottom is not so well supplied with air, even with a great belly pan and rounded. 4 degrees on the belly pan is usually as conservative as 15 deg on the top and sides. If the tapers were continued to a point at the back, it should be only slightly higher than the stagnation point at the front. A bit of rake will help cancel the lift and induced drag if the air goes over the top faster than underneath.
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