Why Ferrari’s new rear flap isn’t easy for rivals to copy

Ferrari SF-26 rear view, engine, 2026 F1, power unit

At Maranello, they didn’t simply rethink the rear flap opening. They changed how the wing “stops working” with the aerodynamic platform. Images clearly show that the upper flap doesn’t just open to a horizontal position, as a traditional solution would. Its motion continues beyond that, rotating on itself until completing an overall movement approaching 270°.This isn’t just a kinematic detail: it’s a precise aerodynamic choice. In the closed configuration, the system works like a classical two-element wing. The flap accelerates the flow over the mainplane, increases suction, and strengthens overall circulation. The result is high downforce, but also a significant amount of induced drag, which is unavoidable when generating downforce.

When the flap is opened so extremely, however, the mechanism effectively stops. It’s not just about reducing the angle of attack and “producing less downforce.” By taking the flap beyond neutral, Ferrari deactivates the multi-element system. Pressure distribution collapses, circulation drops dramatically, and the wing stops functioning as a high-efficiency device.

On the straights, this is exactly what’s needed. Without DRS in 2026, drag reduction must be achieved structurally. If the wing generates less downforce, induced drag drops. But if the system is almost fully deactivated, the reduction can be even more pronounced. Not only that: by decreasing suction downstream, diffuser extraction is reduced. The floor works less aggressively, total car downforce drops, and overall resistance decreases. The concept is subtle but powerful: you’re not just removing downforce from the wing, you’re lightening the entire rear end on the straights. The real challenge, however, is not opening the flap. It’s closing it.

When the flap returns to the active position before braking, rear downforce rises quickly, along with diffuser extraction. If the transition isn’t perfectly controlled, there could be effects on corner-entry stability. Ferrari appears to have worked extensively on miniaturizing the actuator and integrating the system into the lateral supports. This shows it’s not just a wide excursion, but a very refined management of aerodynamic moments during rotation. In short, it’s not a simple flap that opens. It’s a wing that is almost “deactivated” aerodynamically on the straights. And it’s precisely this radical approach, more than the angle reached, that makes the technical solution extremely interesting.

Once adopted, engineers expected to see gains of 5-7 km/h from controlled stall. There’s also a trade-off: a couple of points of downforce are lost. The solution could add more than a tenth per lap on straights, under certain conditions on low-downforce tracks. A rival engineer said it’s quite complicated to replicate quickly, first due to the budget cap, and second because it takes several months to optimize the aero platform, not to mention reliability concerns.

Given the surprise and attention from teams toward this unprecedented solution, FIA Technical Director Nikolas Tombazis was asked for his opinion. “We generally encourage solutions that can reduce drag. That’s why the rules regarding DRS adjustments changed compared to last year, giving teams more freedom. As far as we are concerned, Ferrari’s solution is OK!”

Ferrari’s innovative “reverse” wing therefore represents a bold leap in 2026 aerodynamic strategy, offering a significant straight-line speed advantage by effectively deactivating the rear assembly, a solution that the FIA has already deemed legal despite its technical complexity.