With the McLaren and Honda partnership in full swing and grabbing all the limelight, there are still other areas of the car that are worth exploring, and one that has been commented on by fans is the apparent serrated edge on the bottom of the DRS enabled flap of the rear wing.
With no sponsorship logo on the rear wing it makes it stand out more, as this addition actually first appeared on last years car at the 2014 German Grand Prix.
The idea behind the serrated edge is that each tip will form small air vortices, enabling the airflow to “hold on” to the back of the flap for longer before detaching, increasing downforce. In addition to this, when the DRS flap goes from the open to closed position it will in theory allow the airflow to reattach faster bringing the entire rear downforce back to the car faster than without. This will in turn provide better rear stability under braking after a DRS zone.