If you guys are not familiar with the
All American Soap Box Derby it's worth looking. Too bad I didn't have digital camera in 1978, a wind tunnel, or otherwise ability to calculate Cd. I was only 12 and my racer is long gone now but pix of others should abound on the web. Ignore junior division cars with upright but forward leaning driver. Focus on senior division with reclined driver. Only helmet protrudes from above. Construction is lathe/glass with rounded bottom and very little floorboard left to interact with the ground. Axle trees stick out like wings or fins but the dimensions are very small on a relative scale. Nose rounded in 3D. Tail tapers to a vertical line like a fish. H:W aspect ratios probably in the 4-5 range. For this discussion they are real ground vehicles with very little ground effect I believe. It sure would be neat to know what Cd these sleek buggers achieved... (sigh)
Cheers
KB