View Single Post
Old 03-30-2010, 11:44 AM   #26 (permalink)
COcyclist
Aero Wannabe
 
COcyclist's Avatar
 
Join Date: Dec 2007
Location: NW Colo
Posts: 707

TDi - '04 VW Golf
TEAM VW AUDI Group
90 day: 49.24 mpg (US)
Thanks: 650
Thanked 200 Times in 156 Posts
Quote:
Originally Posted by aerohead View Post
A protractor reveals that Ernies wing relaxes that angle to about 19-degrees,well within Mair's 22-degree limit.
If you place a French-curve over the car,with and without Ernie's wing,it looks like the wing 'doubles' the apparent length of the car's aft-body at centerline ,where the imaginary line would intersect the ground.
With respect to the streamlining template,at centerline,it would be the same as taking the Beetle with 30% of an aft-body,and extending it out
to about 80 %.
Of course the sides aren't done,but you can see how the wing could definitely help push Ernie into 50+ mpg territory.Sweet!
Here is a link to more photos of Ernie Rogers' New Beetle wing.

MAX-MPG TECHNOLOGY

I wonder how necessary those tall end caps are? Would something with a flat top and sides, with respect to the angles of the teardrop template, work for a hatchback too?... sort of like an extended trunk/cargo box??
__________________
60 mpg hwy highest, 50+mpg lifetime
TDi=fast frugal fun
https://ecomodder.com/forum/showthre...tml#post621801


Quote:
Originally Posted by freebeard View Post
The power needed to push an object through a fluid increases as the cube of the velocity. Mechanical friction increases as the square, so increasing speed requires progressively more power.
  Reply With Quote
The Following User Says Thank You to COcyclist For This Useful Post:
aerohead (03-31-2010)