ringo wrote:Interesting topic. Haven't posted in a while but this is something new.
Why would the Cop move forward? hmmm.....
Could have to do with the floor of the car. The wake off the front wheel is also a factor. I cant draw conclussions without certain evidence, but i think those are clues.
As for the rear wing and diffuser, it doesn't have to be related to those parts of the car. We tend to think only those parts matter when in fact the rest of the car is just as important.
CP moves forward for the same reason any CP would move forward when more downforce is created at the front of the CG. These things create downforce because they increase pressure relative to the underside of the chassis, the only thing is the drag penalty is relatively small because the way a vertical end plate interacts with the chassis is different from a horizontal aerofoil like a wing.