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darcane · 08-17-2015, 06:39 PM

Last two digits for NACA airfoil designations indicate maximum thickness as a percentage of chord.

21% of 167 is 35.1.

So this NACA airfoil has the same drag as the cylinder in spite of having a 35 times larger frontal area.

08-17-2015, 06:39 PM	#2 (permalink)
darcane ......................... Join Date: Aug 2009 Location: Buckley, WA Posts: 1,597 Thanks: 391 Thanked 488 Times in 316 Posts	Last two digits for NACA airfoil designations indicate maximum thickness as a percentage of chord. 21% of 167 is 35.1. So this NACA airfoil has the same drag as the cylinder in spite of having a 35 times larger frontal area. __________________ Past Cars: 2001 Civic HX Mods CTS-V 2003 Silverado Mods