Quote:
Originally Posted by JPTrucker
aerohead,
I take it you are referring to the horseshoe vortex that occurs behind the cab. So any effect a wind fence would have would be miniscule to the main problem of minimizing or eliminating the horseshoe vortex, right?
I did find out quite by accident how much air pressure is hitting the tailgate area and basically at least the last third of the bed "floor". I put a heavy steel weight in the back (in the center next to the tailgate) of my truck for better traction in snow. I put it in a good size but short (about 24" by 18" by 10" high) cardboard box inside a plastic bag to keep the box from getting wet. At 55 mph that plastic bag had pushed the flaps of the box (not very strong anyway) down into the box and the plastic bag looked like it was glued down into the box.
Hauling bags of garbage to the dump really shows how violent the wind gets back toward the tailgate but relatively calm up close to the cab. I tend to notice how the wind effects other objects that people are hauling in their truck.
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Yep,the big dogs will tell us to go after that drunk tornado lying on it's side.
Since your actually hauling,the cab wing extension and half-tonneau might help 'cause it has mpg performance close to an aeroshell,but leaves most of the bed 'open' for the utility of it.