Quote:
Originally Posted by LostCause
The car underbody and road surface are not moving at the same speed, therefore any reference to conventional ducts cannot be applied. I argue that interference drag between the car underbody and road surface does not exist as you imply.
Maybe interference drag does exist, but I can't work out two boundary layers touching each other in this situation. If anyone could clarify, that would help.
- LostCause
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This will probably be way to simplistic, and I may be missing the implication, but driving on gravel and/or leaf-covered roads suggests to me that cars and roads interact with each other aerodynamically. I guess that must be an insignificant effect.
I am interested in this topic because I'll be lifting my truck slightly to improve its truck functions. It sounds like I may be able to at least be more aero than stock if I cover the underbody (quick release). That would put a flat undertray 7-9" off the ground.
Might a truck be a candidate for the catamaran shape listed above? I think I've seen some concept cars with that design.