Red Bull RB10 - rear wing updates 28 March 2014
The louvres in the rear wing endplates on a Formula One car are an attempt to reduce the vortices that can be seen coming off the outer top corner of the rear wing in wet or damp conditions. The vortex is created by differing air pressures on the downforce-generating wing surfaces - the upper surface is at high pressure, the under surface is at low pressure and the outer surface of the endplate is at free stream (neutral) pressure. This means the vortex increases with the level of rear wing being used and creates drag. The RB10's original louvres on the upper side of the wing profile (right inset) allowed the high-pressure airflow through from the inside of the endplate to the outside, to equalise the air pressure and reduce the vortex. In Malaysia Red Bull have gone a step further by putting louvres (black arrow) in the endplate below the wing profile. This allows airflow to pass through the endplate from the outside to the inside low-pressure area, reducing the vortex and in turn cutting drag even more. There is also a new, shorter-cord central wing support (centre inset). With the removal of the lower beam wing to comply with the 2014 regulations, most teams now have some form of central wing support. On the Red Bull this is mounted as far forward as possible to minimise the impact on the lower wing surface. This new development will again be to minimise the damage caused to the airflow.