Pages 96 and 99 of the May, 1993 issue of AUTOMOBILE Magazine provided some FoMoCo numbers for the Ford ESCORT RS Cosworth.
* The upper wing degraded the Cd from 0.34, to 0.38.
* Top speed was reduced from 145 mph, to 140 mph.
* @ 110 mph, the car developed 10-pounds front downforce, and 37-pounds rear downforce.
* Over 200- hours were spent in the Ford of Cologne, Germany wind tunnel to aerodynamically tune the car for the downforce and engine turbocharger cooling.
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As an aside, I applied Hucho's, December, 1986, rule-of-thumb for delta-Cd vs delta- Top Speed.
The result's accuracy was over 98%.
