F1 Technical: Ferrari Frustrated by Mercedes Adopting Rejected Aerodynamic Concept
Ferrari has formally requested a regulatory clarification from the FIA regarding aerodynamic designs on the Mercedes W17, following the rejection of a similar concept proposed by the Maranello team for its SF-26 earlier this season. The dispute centers on serrated extensions on the rear diffuser, a design feature that technical stewards led by Jo Bauer eventually restricted following pressure from Ferrari and other teams.
Did You Know? The design concept in question, which Ferrari’s staff under Diego Tondi and Franck Sanchez originally intended for the SF-26, was part of a broader rear-end development that included a reverse wing and an STM exhaust-blowing system.
The Conflict Over Aerodynamic Concepts
The controversy emerged after Mercedes introduced an update package at the Canadian Grand Prix in Montreal, featuring modifications to the trailing edge of the rear diffuser. Ferrari engineers identified these features as nearly identical to designs they had previously submitted, which were rejected by FIA technical commissioners at the start of the season. According to reports from Autoracer.it, Ferrari’s leadership expressed frustration that the same aerodynamic philosophy was permitted for Mercedes after being deemed non-compliant for the SF-26.
Expert Insight: In Formula 1, the line between “industrial espionage” and the standard migration of engineering talent is often blurred. While teams frequently monitor rivals through trackside photographers, the rapid adoption of a rejected concept suggests that personnel movement—specifically engineers shifting between teams—may play a significant role in how technical solutions are shared or refined across the grid.
Regulatory Intervention and Future Implications
Prior to the Monaco Grand Prix, FIA technical delegates intervened by instructing Mercedes to revise its serrated diffuser extensions, establishing more restrictive limits for the design implemented by James Allison and Simone Resta. Despite these restrictions, the incident has raised questions within the paddock regarding how Mercedes successfully developed a concept that had already been shelved at Ferrari’s Gestione Sportiva.
It is likely that Ferrari will revisit its own version of the serrated diffuser design in upcoming races, provided the geometry complies with the new, stricter FIA guidelines. The situation underscores the ongoing challenge for the FIA in maintaining a level playing field when teams independently arrive at similar, highly specific aerodynamic solutions.
Frequently Asked Questions
What was the specific aerodynamic component in dispute?
The dispute involves serrated extensions on the trailing edge of the rear diffuser, a design that Ferrari had proposed for the SF-26 but was initially rejected by FIA officials.

Why did Ferrari contact the FIA regarding Mercedes?
Ferrari, alongside other teams, sought a regulatory clarification after observing that Mercedes had successfully introduced a diffuser design on the W17 that was nearly identical to the concept previously disallowed for Ferrari.
Did the FIA take action against Mercedes?
Yes. According to reporting, technical commissioners led by Jo Bauer requested that Mercedes revise its serrated extensions and adhere to more restrictive limits before the Monaco Grand Prix.
Do you believe the current FIA regulatory process is sufficient to prevent the unauthorized transfer of technical concepts between competing teams?