View Single Post
Old 10-24-2009, 11:23 PM   #29 (permalink)
Bicycle Bob
EcoModding Apprentice
Bicycle Bob's Avatar
Join Date: May 2008
Location: N. Saskatchewan, CA
Posts: 1,618

Appliance White - '93 Geo Metro 4-Dr. Auto
Last 3: 42.35 mpg (US)

Stealth RV - '91 Chevy Sprint Base
Thanks: 79
Thanked 363 Times in 252 Posts
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.
  Reply With Quote