View Single Post
Old 10-17-2009, 02:02 PM   #14 (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
wing

Ernie,from Kelley and Holcombe's SAE paper of 1963,which established a relationship between drag and mpg,and using your baseline of 58-mpg at 60 mph.For 61 mpg,I get Cd 0.34 and at 65.5 mpg,I get Cd 0.28 for your New Beetle.
Off hand,I can't remember what the Herrod Helper did for the original Beetle back in the 1970s,but your wing is a massive improvement over that wing and it's been fun for years now,to know you've been out there getting these great numbers!
She looks like a production piece too,and probably garners a lot of attention from other VW owners.
Thanks for doing it and sharing the build info.It sets a great bar for the rest of us to work towards.
  Reply With Quote