Sauber C31 - exhaust positioning 15 March 2012
Following an FIA clampdown designed to eliminate blown diffusers, teams have had to rethink exhaust positioning this year. Sauber's solution sees the hot exhaust air directed in a wide and low direction towards the rear of the car (yellow arrows), between the tyres and the diffuser. It relies on the Coanda effect, which makes it possible to divert the airflow when it leaves the exhaust pipe. The hot air is guided by an assortment of curved surfaces cleverly placed around the exhaust (see red arrows). As the surfaces curve away from the flow of air, low pressure builds, which in turn forces the air to stay in contact with the surfaces. This concept has also been used by McLaren and Ferrari.