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Old 03-27-2012, 05:11 PM   #1 (permalink)
Vekke
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Drag reduction modifications in wind tunnel: Audi A2 from Cd 0.288 to 0.204

Hi,

Thanks to Ausias who tipped me off with this Cd study:

http://wwwm.coventry.ac.uk/researchn...%20Vehicle.pdf

Lupos 0.25 Cd target starts to feel pretty plausible without chopping the roof .

Enjoy.

----

SUMMARY...

(added by MetroMPG, because these online files have a bad habit of disappearing...)


  • START: MIRA wind tunnel showed a stock co-efficient of Drag (CD) of 0.288
  • COOLING: vents, intakes, panel gaps taped on front end - Total Contribution: 9% of total Drag
  • Underfloor:-Foamboard and tape -All components covered -Total Contribution: 7% of total Drag
  • MIRRORS - door mirrors removed: -Total Contribution: 5% of total Drag
  • Wheels and Wheel arches: Wheel Spoilers / spats; smooth wheel covers; Wheel Arch Blanking (rear fender skirts); Underfloor Wheel Arch Blanking
  • Base pressure recovery (tailgate "box cavity")

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