Article C3.18.11
Rear Wing Flap Flexibility
Technical Regulations
Article C3.18.11
Rear Wing Flap Flexibility
Chapter: C3
In Simple Terms
The rear wing flap can only bend a tiny amount (7mm maximum) when a 500N force is pushed backward on it. This test is done at a specific height and width on the wing to ensure teams aren't using overly flexible flaps that could give them an unfair advantage.
- Maximum deflection allowed: 7mm horizontally under load
- Test load applied: 500N (about 51kg of force) pushed rearward
- Test location: Specific zone 300mm either side of car center, at height Z=800
- Deflection measured against the main rear wing plane as reference point
Official FIA Text
RW Flap may deflect no more than 7mm horizontally when 500N load applied horizontally in plane Z=800 at points within 50mm of car centre plane and 300mm either side. Load applied rearward using 25mm wide adaptor. Deflection measured relative to forward Rear Wing Mainplane part.
rear wing flapflexibility testdeflectionaerodynamic regulationstechnical compliance
2026 Season Regulations