Originally Posted by
blah
Let me ask you this. Have you ever sat in the bed of a pick-up truck with your back against the cab? Which way was the wind blowing? Think about that for a minute.
There is no comparison between the two. Air in the bed of a pickup truck travels in a loop off the roof because there is no air coming from under the cab into the bed. It is blocked by the front of the bed and the cab. Air can travel under the hood and on top of the hood where it will simply merge as it exits the rear of the hood.