A number of chages have been made to the Technical Regulations for 2019 in a bid to promote closer racing, improve overtaking possibilities and increase safety:
A simplified front wing with standardised endplates, tweaked dimensions and no upper flaps:
- This will encourage aerodynamicists to direct more of the flow to the underbody (where it is less sensitive to the disturbed wake of the car in front) than the outer body.
- The deletion of the upper flaps at the outer ends of the wing will make it impossible to create the vortices that are generated by the current, highly complex endplates to enhance the outer-body aerodynamics. This will further encourage the so-called ‘inwash’ aero philosophy of directing airflow to the underbody, rather than the current emphasis on ‘outwash,’ which is highly sensitive to the air from the car ahead and therefore makes it harder for cars to follow one another closely.
- Tweaks to the front wing’s dimensions and the limiting of under-wing strakes to two each side will further discourage outwash aerodynamics.
Winglets mounted on the brake ducts and blown axles are banned from 2019:
- The winglets played a part in directing the flow to the outer part of the body.
- Blown axles used air directed out of the centre of the wheel at high speed to energise the flow down the outer surfaces of the bodywork further back.
Barge boards are lowered by 150mm and moved forwards by 100mm:
- The lowering of barge boards makes them less powerful in directing the airflow.
- Moving the barge boards forward makes them less sensitive to the airflow being disturbed from the car in front.
The rear wing endplates will no longer be permitted to have horizontal gills:
- These equalize the pressure between the inner and outer faces of the endplate to give a faster flow over the top of the wing for more downforce, but they introduce an extra disturbance to the wake, which worsens the performance of the car behind.
The DRS opening will be increased from 65mm to 85mm:
- Together with an increase in width and height of the wing, this will make the DRS around 25-30% more powerful so as to allow it to be effective on those circuits with too short a straight for the current system. The FIA will also review the length of DRS zones at every circuit in order to maximise the effect of the changes
- The increased height of the rear wing will take the ‘rooster tail’ wake coming off the back of it higher into the air than currently. More of the energy from that wake will be diffused into the free air around it before it returns to the level where it will be affecting the following car.
Further Techical Regulation changes include:
- The rear-view mirrors and rear wings will be slightly changed to improve visibility and safety.
- The onborad cameras will change position in response to the introduction of the halo, with the aim improve the TV viewing experience.
- Rear endplate lights will be added to improve safety.
- Minor modifications to the halo will be added to improve safety during driver extraction.
Full 2019 Technical and Sporting Regulations can be found on the FIA website.