F1 cars are occasionally sprayed with a temporary fluorescent paint or liquid during testing sessions, primarily for aerodynamic analysis. This substance, often called “flow-vis” (flow visualization) paint, is used to study how air moves over the car’s surfaces. Here’s why it’s done:
1. Aerodynamic Testing
- Flow-Vis Paint: Engineers spray this fluorescent, oil-based liquid onto parts of the car (e.g., wings, diffusers, or bodywork). As the car drives, airflow patterns disturb the liquid, leaving visible streaks. This helps teams visualize airflow behavior, turbulence, and whether aerodynamic components (like wings or bargeboards) are working as intended.
- Wind Tunnel Validation: Flow-vis is often used alongside wind tunnel data and computational fluid dynamics (CFD) to verify real-world performance during track tests.
2. Tire Analysis
- Occasionally, teams spray tires with chalk or temporary markings during practice sessions to monitor tire wear, slip angles, or contact patches. This helps optimize tire management strategies for races.
3. Other Sprays (Not Paint)
- Tire Warmers/Cleaners: During pit stops, mechanics sometimes spray tires with solvents or cleaners to remove debris or improve grip, which might be mistaken for paint.
- Lubricants/Adhesives: Sprays like anti-seize compounds or adhesives are used on wheel nuts or components during pit stops but are not paint.
4. Post-Race Inspections
- Rarely, scrutineers might use temporary markings to check for illegal modifications after a race, though seals and digital sensors are more common in modern F1.
Key Notes:
- Temporary Use: Flow-vis and other spray paint are washed off after testing—they’re not part of the car’s permanent livery.
- Regulations: Teams must comply with FIA rules on substances used during races to avoid penalties.
In summary, the “paint” seen on F1 cars is usually a tool for aerodynamic research or tire analysis, not decorative. It’s a critical part of optimizing performance in a sport where milliseconds matter!
From: Marking Paint Manufacturer https://www.marking-paint.com