Quote:
Originally Posted by redpoint5
Wouldn't a coast-down test be perfect for testing the effectiveness of vortex generators? This would eliminate more of the variables inherent in tracking fuel economy and generate data that is more related to aerodynamic efficiency.
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I tried coast-down tests back in about 1988 when I first started playing with car aero, but quickly gave up. I found that they were nothing like as repeatable as (say) acceleration testing - the variation was large.
Happy to hear the results of other people's testing though - especially the spread of times with the car ostensibly identical.