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50's chevy 80's ford rear aerodynamics
I was just reading road and track classic from 2006 were they take a 1959 4 door chevy and put it in a wind tunnel, they proclaim that the pointed rear fins or gull wings create air seperation and decrease drag for the rear of the car......Is this right? I thought that any sharpe edge on a moving body creates vortex's that increase drag. So then explain to me about the ford bi wing which reduces drag by 5% when the first wing creates air seperation or vortex's?
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