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The magazine Sport Auto, which stuntman quoted, carries out all of their wind tunnel tests in Mercedes' large fixed floor wind tunnel in Untertürkheim, Germany. BMW's new rolling road wind tunnel in Munich would surely measure front and rear lift more accurately but that wind tunnel only opened in 2009. For the sake of consistency, since Sport Auto started measuring aerodynamics in 1997, they have always used Mercedes' Untertürkheim facility.


It's too bad that wind tunnel doesn't have a moving floor but I think it's borderline absurd to think that the measurements carried out in Mercedes' wind tunnel are meaningless. Personally, I'm glad that Sport Auto didn't switch facilities because as a result, the aerodynamic drag they measured for our NSXs way back when can still be validly compared to all of the measurements they carried out more recently - see stuntman's posts above. Had Sport Auto switched facilities, the comparison would be problematic.


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