Downwash Exhausts - Mercedes, Williams, Caterham & Marussia used these exhausts which also use the 'Coanda' effect but due to their placement it only attracts the airflow traveling over the Sidepod
In terms of a speed advantage as the device is passive the point at which it switches from producing downforce to a stall is imperative. The RW80's / F Ducts driver interaction gave the switching capacity over to the driver allowing them to activate the system when they felt comfortable with the level of downforce available leading to around a 10KPH-15KPH gain in top speed. In order to create a safety buffer the teams will have to be much more lenient with DRD as you don't want it stalling the rear wing on the exit of a corner too early. This would lead to a lower drag reduction value but could still see the teams gaining upto around 8KPH in top speed.
- The rear wing planes are set at a higher angle of attack than usual
- Air entering the airbox or additional airbox 'Ears' (Car dependant) and running through the engine cover to the Pylon.
- The airflow then runs up the pylon and exits through slots cut into the side of the pylon, tangentially blowing across the mainplane.
- This airflow allows the rear wing to operate up to the speed threshold whereby the airflow being received from the pylon cannot sustain the angle of attack the wing is set at. This leads to the wing stalling, detaching the airflow completely and reducing both downforce and drag.
DRS has been reduced to usage only within the specified zone(s) at each GP this year with it previously having unlimited usage. This will have an effect on how the teams design their rear wing planes in 2013 with the DRS delta now changed. Many teams were skewing their setup to allow for a maximum DRS gain but with the likely introduction of DRD and the rule changes this approach will probably alter.
Lastly just a quick mention about Sauber's test package used at the young drivers test in Abu Dhabi, the team introduced an exit on the side of the Sidepod to assist in attachment along the length of the Sidepod a feature that may well be part of many of the 2013 designs that go along the Ramped bodywork lines.