Diffuser Design
Formula 1 teams are reviving a design feature known as the mousehole in their 2026 cars, with an enlarged version dubbed the rathole. This slot in the rear floor aims to optimize airflow into the diffuser. Mercedes and other frontrunners have implemented variations, while McLaren has not yet.
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Mercedes and Ferrari have introduced intriguing holes in the diffusers of their 2026 Formula 1 cars during recent shakedowns, aiming to boost downforce under new regulations. These designs channel airflow from undercut sidepods to enhance performance amid simpler floor setups. Experts view the approach as an interesting evolution in aerodynamics.