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Originally Posted by Cd
Is it possible to add aerodynamic fences to direct the airflow around the side of the cars A pillar ?
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You'd need something like an aircraft's leading edge slat to do that.
The idea is being used on European cab-over-engine lorries.
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I ask because i noticed the sides around my windshield have a raised 1/4" channel that i would have thought would snag the sideways traveling air and direct it upwards.
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Same on my car.
I'd say their purpose is more to keep water off the side windows in the rain / when using windshield washers (they're not very successful at that either)
At best, they'd keep some part of the boundary air on the car, flowing aft - with the rest spilling over the fence.