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Old 05-14-2009, 07:14 PM   #148 (permalink)
Brillig
Fledgeling Aeromodder
 
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Join Date: Apr 2009
Location: Birmingham, Alabama, USA
Posts: 33

Lillian - '93 Ford Escort Wagon
90 day: 34.98 mpg (US)
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Late to the Party, but ...

to incorporate the 'mirror effect' caused by the ground effect, I model using a partial 'reflection' as below:

Name:  Escort Profile with KAMMback 1.bmp
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Size:  24.1 KB

I don't think it's a critical difference, but I know that this was done in wind tunnel tests back in the thirties (2 wind tunnel models attached at the tires to model the 'mirror effect')

Does this matter?
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