View Single Post
Old 12-30-2013, 04:58 PM   #247 (permalink)
aerohead
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,861
Thanks: 23,922
Thanked 7,207 Times in 4,640 Posts
proportions

Quote:
Originally Posted by NeilBlanchard View Post
It is a "useful" video, but one wonders about the narrowness of the wind tunnel? I thought the proportions of the tunnel had to be significantly larger than the car to be "true"?
The consensus seems to recommend that the test vehicle constitute no more than 5% of the test section cross-sectional area.Only a few tunnels qualify under this criteria.
Hucho does mention that the Pininfarina tunnel,while quite small in comparison,does produce numbers within the 2.5% standard deviation,which is right in there with the big league.
A2 may have some things figured out.Don't know.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote