DRS is perhaps the most controversial regulation in modern F1 — a system deliberately designed to make overtaking easier by artificially equalizing the straight-line speed disadvantage of a following car.
The Mechanism
A hydraulic actuator pivots the rear wing's upper flap approximately 8-10° upward on a preset trigger. This opens a 65mm slot gap between the upper flap and the main plane. High-pressure air from above the wing bleeds through the slot, preventing flow separation on the upper flap's suction surface — and critically, converting a significant chunk of lift (downforce) into pure drag reduction.
The Zones
The FIA designates detection points and activation zones at every circuit. A driver is eligible to open DRS if they are within one second of the car ahead when passing the detection point. The activation zone is typically a long straight following a low-speed corner.
The Numbers
DRS reduces drag coefficient by approximately 0.10 Cd — equivalent to removing a small wing. On a 1km straight with 300km/h terminal speed, that adds 10-14 km/h. The effect is asymmetric: the chasing driver uses it, the car being chased cannot.
The Controversy
DRS has divided opinion since its 2011 introduction. Critics argue it creates "fake" passes — the following driver simply drives past without a genuine overtaking move. Proponents counter that without it, close racing would produce far fewer actual position changes given modern aero sensitivity.
2026: Replaced by Active Aero
DRS ends with the 2025 season. The 2026 regulations introduce fully active aerodynamics — driver-controlled wing angles throughout the lap, with an FIA-governed "override" mode replacing the DRS proximity rule.
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