Quote:
Originally Posted by Frank Lee
Reminds me of when I was airing the tires on the Tempo and forgot I set one of those standard black plastic valve stem caps on the cowl panel. 350 miles later when I got home I discovered it still sitting there! 
Anyone still think there is "flow" there? |
I know there isn't on my car. When my xB is dirty, and there's rain or dew on it in the morning (not so much now, since it's winter all of a sudden), one can very easily visualize the flow along my hood:
I think a lot of this is due to the odd shape of my car, but even more conventionally shaped vehicles can't possibly have the wipers sticking all that far out into the flow. Like basjoos pointed out, the main advantage is to reduce noise and ram pressure.