Lower partial Kammback

[turbovr41991]

I always see upper Kammback for the rear window or hatch, but wondered what gains might be avialable for a hitch mounted lower Rear Kammback. Any thoughts?

Please move this thread to Aerodynamics. Thank you.

[Daox]

Not as much. In order or the kammback to work well you must have laminar flow before it. Its much easier to get laminar flow on the top of a vehicle vs on the bottom side.