Ferrari failed floors
Over the Japanese and US Grands Prix, Ferrari introduced two new floors but neither made it to race day. Either Ferrari wasn’t getting what it predicted from them or the development direction had reached a crossroads. I wasn’t sure what it expected to get with the detail changes it had made to the slots around the tyre contact patch from the Suzuka development. At Austin, that area was modified again – with a few more turning vanes added. The idea of this Coke-bottle area and the underfloor is to get as big a pressure differential as possible across the floor structure, with low pressure underneath and a higher pressure above. But you need to maintain good highspeed airflow inside the rear tyre to help the performance of the rear wing and diffuser.
The longitudinal slots pull airflow from the floor’s upper surface, and act like a skirt, reducing the amount of airflow pulled under the floor. These small vertical turning vanes are intended to set up an outwash vortex along the floor’s outer edge, similar to the effect of the trailing edge of the bargeboards and front-wing endplates, to improve the performance of the slots and underfloor.