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Old 05-05-2022, 11:21 AM   #10 (permalink)
aerohead
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under the truck

Quote:
Originally Posted by hat_man View Post
Something similar to that but originating at the center of the front bumper area and ending about where the D in Goodyear is at the rear wheels or slightly ahead of that. Maybe not so close to the ground though. Just something to guide the flow that direction like the cab spoiler guides the flow in the half tonneau arrangement.
The flow below the truck does not possess the kinetic energy present in the 'upper body' flow, which creates the vortex captured underneath the 'wing' and tailgates upper trailing edge; which is telegraphing the low pressure of the vortex core, under the open tonneau, to the inner face of the tailgate. That provides the drag reduction!
Pickup trucks don't have a rear 'valence' which might act like a mini-tailgate. Sometimes they don't even have a rear bumper.
You'd be expecting a pressure phenomena which is structurally impossible for it to exist.
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