Last Updated on March 26 2026, 2:07 pm
Despite having won the opening Grand Prix of the season, Mercedes remains embroiled in controversy over their interpretation of the all new 2026 F1 technical regulations. The controversy over their power train containing clever property-altering metallurgical components that increase the compression rate above the mandated level set by the FIA rumbles on.
For no apparent reason, from the 1st of June – a seemingly arbitrary date – the FIA will change its engine compression ratio test from merely being run in ambient temperatures to include a test at 130°C. From 2027 only the ‘hot’ test will be used.
Yet unlike in 2014, Mercedes dominance to date this season does not appear to be related to their engine alone. After years of failing to build an F1 car suited to the aerodynamic requirements of the regulations (ground effect era), Mercedes have triumphed with the W17 in more than just the power department.
New moveable front wings tightly regulated
To ensure the cars didn’t run out of electrical charge half way down the straights, a mechanism had to be found to allow them to drop seem of their traditional drag. Yet instead of boosting the DRS to allow this, early simulations of the new cars and PU’s suggested merely opening the rear wing would destabilise the car and shift the aerodynamic balance too far forward, meaning the car would be highly prone to spinning.
So we now have from and rear wings changing their angle of attack simultaneously, yet even this is very highly regulated by the FIA. The transition between high and low downforce modes is strictly controlled in the design rules and it must be complete in 400 milliseconds.
Yet following the Chinese Grand Prix, one eagled eyed fan observes the Mercedes wing was taking closer to double the time allowed to complete its transition. If proven to be the case, then Mercedes are in breach of the regulations and liable for future disqualification.
The debate was sparked by a Reddit post in the Formula 1 community, where a user compared slow-motion footage of the Mercedes car approaching two corners. The clip appeared to show the front wing closing at different speeds in different situations. The original post can be viewed here.
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Fans online spot the Mercedes ‘trick’
The observation quickly gained traction online, with thousands of fans weighing in on what might be happening. While many dismissed the idea as an optical illusion or a mechanical quirk, others suggested that this behaviour could potentially indicate a grey area in the new aerodynamic regulations.
At first glance, slower wing movement might seem disadvantageous rather than advantageous. But in Formula 1, even extremely small aerodynamic changes can translate into measurable gains.
If the wing remains in its low-drag, straight-line position slightly longer before fully returning to the high-downforce configuration, the car can maintain its maximum speed for longer in the braking zone. Further, a longer transition allows the driver a little more time to adjust to the balance of the car as it switched between downforce levels.
Another advantage would be given that Mercedes have designed their power unit for maximum efficiency, this would contribute towards a longer transition between when the MGU-K stops adding speed and begins harvesting little earlier and reducing the amount of ‘clipping’ required.
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The advantage to a slower front wing transition mechanism
Further, under braking the car could theoretically retain a higher speed as the transition progresses, saving milliseconds here and there which adds up around a lap of 70 of a Grand Prix.
Ferrari have now spotted the Mercedes trick too and, for now, requested clarifications from the FIA regarding the front wing transitional mechanism. There is a regulatory sensor attached to the front wing to measure the transition, but suspicions have arisen Mercedes are using a two phase closure mechanism which avoids the FIA test.
The first part of the movement is completed within the 400 milliseconds allowed. Then when the sensor has reported the timing a second phase of the transition kicks in to complete the the aerodynamic shift.
Huge punishments issued by the FIA for regulation breaches
Whilst at the moment Ferrari’s interest is not a formal protest, it could quickly become one during up coming weekend of the Japanese Grand Prix. Once lodged the matter quickly becomes part of a formal technical (or sporting) investigation with the punishments handed out harsh indeed.
Back in 2020, Renault protested the brake ducts being used by the then Racing Point Silverstone based team. The claim was they looked remarkably similar to the Mercedes design, which was upheld and Racing Point were issued with a €400,000 fine together with a FIFTEEN POINT DEDUCTION in the championship.
Then again, the FIA often take a more moderate approach to certain matters which exist in the ‘grey areas’ of the regulation as in 2020 Red Bull protested Mercedes duel steering mechanism. The FIA ruled it legal for that year but banned it in 2021.
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Ferrari racing the anti and may protest
At this stage, Ferrari are merely asking for information from the FIA, but this could escalate quickly of evidence is found that Mercedes are deliberately avoiding the FIA sensor to breach the regulations. A clear indication of their guilt would be sold they have an alternative system ready on standby to switch in as the FIA’s examination gains traction and Ferrari racing their enquiry to a protest would really up the anti.
Of course all this could be a figment of everyone’s imagination and a simpler explanation rather than the two phase closure cold be the case. Should the actuator controlling the wing could complete its movement within the legal 400-millisecond limit; however, aerodynamic loads acting on the carbon fibre structure could cause the wing to visually settle more slowly afterwards.
Again, this would have been part of Mercedes design of the aerodynamic moving parts, but this time would be deemed legal. Following both cars passing scrutineering in China, the FIA clearly believes the AM17’s to be compliant. However, by lodging a formal request for clarification, Ferrari have moved the discussion on from one being of pure conjecture to a matter the FIA must investigate.
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Last Updated on March 24 2026, 2:27 pm
Formula One in 2026 is a very different proposition to how it was a quarter of a century ago. Then we had a tyre war between Micheline an Bridgestone with five teams signed to the French manufacturer and six to the one from Japan.
The Bridgestone tyres were generally more consistent over a race distance. They had a very close technical partnership with Ferrari, which many experts believe contributed significantly to the team’s dominance during this era. Michelin were known for being exceptionally fast in qualifying and performing well in hotter track conditions. They saw immediate success in their comeback year, with the Michelin-shod Williams team winning the fourth round of the season at Imola.
Yet during this era, the races were often tedious affairs as TV commentators would relay the fact that driver x was now 0.1 closer to Y than on the previous lap – when the gap was in fact several seconds….. CONTINUE READING
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The FIA measures wing transition time. Binary — within 400ms or not.
What it does not measure is whether the pressure field transition is harmonically coherent — whether the aerodynamic reorganisation happens as a single continuous event or as two distinct phases separated by a partial stabilisation.
A two-phase wing transition leaves a specific signature in THP-Flow. Not a smooth coherence curve. Two separate events — a drop, a partial recovery, a second drop. Visible in the Race Coherence Map in real time.
The sensor passes. The coherence map tells a different story.
This is not a grey area in physics. It is a grey area in measurement.
THP-Flow measures what happens to the pressure field. Not just when the wing moved.
THP-Flow Pro · App Store · $49.99
Formula E · F1 2026 · Aero Analysis
🔋 The coherence of the transition. Not just its duration.
I feel like they should have their wins taken away because of this issue