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Old 05-18-2011, 01:16 PM   #159 (permalink)
orbywan
EcoModding Apprentice
 
Join Date: Jul 2010
Location: Tucson, AZ
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That is fabulous information Wyatt, thank you very much. I am inspired to carry on with this project. That curved four-sided approach is exactly what I thought might be the best shape for back there. The last few feet of the tip not making that much a difference is also encouraging

Judging roughly by the photos, the rear truncated cone is about 23% of the length of the modified vehicle shape. That means to be somewhat proportional, my rear cone would be about 6 long, that's totally doable. I was thinking more like 10 feet since the box is so big.

The drag reduction numbers for this project are staggering. Square at both ends, .89CD, fully rounded front, truncated rear cone, full belly pan, .242CD. That's only a 72.8% reduction in drag!! Wow. Now I just have to figure out what materials to use to build the cone. Thanks again, great information. Yea, NASA!
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