The wheel arch or “mudguard” concept emerged after heavy rain meant that the 2021 Belgian Grand Prix ran without any racing laps being completed.
The idea is that all cars have the facility for the wheel arches to be fitted in cases of extreme wet weather in order to ensure that track action can take place. If the track dries, the devices will stay on the cars.
The FIA outlined its plan for testing after last November’s World Motor Sport Council meeting in Abu Dhabi.
It noted: “Driver feedback has suggested that there has been reduced visibility in extremely wet conditions with this latest generation of cars, which is a key determinant on starting, or needing to suspend sessions.
“Therefore, the FIA commenced a study to define a package of parts aiming to suppress the spray generated when running in wet conditions.”
One of the aims of the testing is to explore the role of the diffuser in creating spray, with the FIA noting that it would study “the contribution of surface water picked up through the underfloor tunnels to understand its significance”.
A key proviso of using the arches is that they will not “unduly hinder pitstop tyre changes.”
The Silverstone test will take place on the national circuit, with only the main straight soaked with water.
It’s understood that the Mercedes will be equipped with the arches and the McLaren won’t, to allow a direct comparison to be made, with the cars running together and independently. Another aim will be to gather aero data related to the impact of the arches.
Source: Autosport