F1 Glossary · cars
Floor
The floor is the large carbon fiber surface underneath an F1 car that generates the majority of its downforce through ground effect.
The floor is arguably the most critical aerodynamic component of a modern Formula 1 car. Since the 2022 technical regulation overhaul, cars have utilized "ground effect" aerodynamics, where the underside of the chassis is shaped to accelerate airflow, creating a low-pressure area that sucks the car toward the track surface.
How the Floor Generates Grip
Unlike the wings on the top of the car, which push the car down, the floor pulls it down. It features two large longitudinal channels called Venturi tunnels. As air enters these tunnels, it is constricted and accelerated. According to Bernoulli’s principle, faster-moving air has lower pressure. This pressure differential between the top of the car and the bottom creates massive amounts of downforce with relatively little drag compared to traditional wings.
Why It Matters During a Race
The floor's performance is highly sensitive to "ride height"—the distance between the car and the asphalt. If the car is too high, the aerodynamic seal is lost and downforce drops. If it is too low, the car may "bottom out," hitting the track and becoming unstable. Even minor damage to the floor's edges or the "tea tray" (the front section) from hitting a curb can result in a significant loss of lap time, as it disrupts the precise airflow required to maintain the vacuum effect.
Recent Examples and Evolution
In 2022, many teams struggled with "porpoising," a violent bouncing caused by the floor suddenly gaining and losing downforce at high speeds. More recently, at the 2023 Monaco Grand Prix, cranes lifted the Red Bull RB19 and the Mercedes W14 after crashes, revealing the immense complexity of their floor designs. The Red Bull floor, in particular, featured intricate geometries that rivals spent months trying to analyze and replicate.
Common Confusion
Fans often confuse the "floor" with the "plank." The floor is the entire carbon fiber structure, while the plank (or skid block) is a mandatory wooden-like strip made of Permali attached to the center. The plank is used by officials to ensure teams aren't running their cars illegally low; if the plank wears down more than 1mm, the car is disqualified.
Common questions
- What is the plank?
- The plank is a 10mm thick strip made of a dense wood composite called Permali. It is mounted to the underside of the floor to limit how low a car can run. If the plank is worn down by more than 10% during a race, the car is disqualified for a technical infringement.
- Why is floor damage so detrimental?
- Because the floor generates over 60% of a car's total downforce, even a small crack on the edge can cause air to leak into the low-pressure tunnels. This ruins the aerodynamic seal, leading to a loss of grip, increased tire wear, and significantly slower lap times.
- Why do teams try to hide the underside of the car?
- The floor is the most secretive part of F1 design. While wings are visible to everyone, the complex curves and vanes under the car are hidden. Teams use "screens" in the garage to prevent rivals from photographing these shapes, which are the primary source of performance.