Metric analysis

FIA holds fire on F1 porpoising metric until French GP

Ahead of the Canadian Grand Prix, motor racing’s governing body issued a Technical Directive (TD) to teams announcing its intention to help limit the amount of cars bouncing after driver complaints.

The FIA ​​wanted to create an aerodynamic oscillation metric (AOM), which would help set a limit at which cars would be allowed to bounce up and down.

Once the metric is in place, then any team that exceeds the limit would be forced to increase their ride height to reduce the porpoising phenomenon.

Any team that refused to comply with the requirements and whose car continued to bounce risked being kicked out of a grand prix event as their challenger would be considered a “dangerous construct”.

The FIA ​​began its data collection exercise at the Canadian Grand Prix, using an on-board accelerometer to try to better understand the behavior of the cars.

Following analysis of the data from Montreal and discussions since then with technical directors on the situation, the FIA ​​has informed the teams that it plans to put a metric on the line for the French GP next month.

In an updated technical directive that has been published, it says teams will have two races to analyze the situation before the FIA ​​imposes its restrictions.

A statement from the FIA ​​said: “We have set a metric to monitor this – the update has been sent to teams to allow them to conduct their own analysis over the next two grands prix to understand what changes, if any. , they may need to implement to be compliant when the Technical Directive comes into force from the French Grand Prix.

The FIA ​​has also set updated parameters for board wear and skid stiffness, which go hand-in-hand with the metric.

Lewis Hamilton, Mercedes W13

Photo by: Andrew Ferraro/ Motorsport pictures

Second past stay

One of the most controversial aspects of pre-Canada TD was the green light given to teams to add a second stay and strengthen their floor.

This sparked complaints from some teams that it was a breach of FIA protocols, as the TDs do not have the power to change the regulations.

Additionally, the way Mercedes was so quickly able to add a second stint for Friday testing in Canada raised concerns that the German manufacturer was given advance notice of the FIA’s intentions.

Mercedes scrapped the second spell for Saturday in Canada after feeling it had failed to make a step forward in form, and there was a growing threat of protest from rival teams.

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Although there was the option for the FIA ​​to fast-track the granting of a second reprieve in the regulations for the race at Silverstone this weekend, it chose not to go that route.

Instead, no additional provisions will be given to teams to help them try to get rid of the porpoising issues they have been facing.

Not all teams felt the FIA ​​should step in and get involved with the porpoising issue in the first place.

Alfa Romeo ground engineering manager Xevi Pujolar said: “If we want to, we could also bounce back.

“It depends where you choose to run [the car]. If we want to bounce like a kangaroo, we can do that too. But we just choose to stay out of it: not only for driver comfort, but also to avoid damage to the car. I don’t see any effect on our performance with this.