Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Making a more efficient, aerodynamic soapbox gravity race car

darcane · 07-24-2015, 04:14 PM

This looks like you are intending to travel at high speeds for long distances, rather than a typical soap box derby. How far is your race? About how fast do you go?

I actually just got done building a soap box derby car for my 6 year old son (and he got first place in his class!), so I am very interested in this topic. However, I'm not sure how you would calculate the Cd of a tubular chassis like that with any degree of accuracy. I would guess empirical testing would be required.

07-24-2015, 04:14 PM	#2 (permalink)
darcane ......................... Join Date: Aug 2009 Location: Buckley, WA Posts: 1,597 Thanks: 391 Thanked 488 Times in 316 Posts	This looks like you are intending to travel at high speeds for long distances, rather than a typical soap box derby. How far is your race? About how fast do you go? I actually just got done building a soap box derby car for my 6 year old son (and he got first place in his class!), so I am very interested in this topic. However, I'm not sure how you would calculate the Cd of a tubular chassis like that with any degree of accuracy. I would guess empirical testing would be required. __________________ Past Cars: 2001 Civic HX Mods CTS-V 2003 Silverado Mods