2021 AZERBAIJAN GP

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#406

Post by erwin greven »

Bottom post of the previous page:

Pirelli identifies cause of Baku failures

Pirelli says the failures suffered by Max Verstappen and Lance Stroll in the Azerbaijan Grand Prix were due to the running conditions of the tires.

Stroll had a high-speed accident on the run to the start/finish line when his left rear failed on lap 30, and then Verstappen had a very similar failure 17 laps later on the same part of the track while leading. Pirelli has now completed its analysis of what happened and delivered a report to the teams and FIA, stating the way the tires were being run was to blame, despite the teams following Pirelli’s initial guidance.

“This analysis also took in the tires used by other cars in the race, which had the same or a higher number of laps on them compared to the ones that were damaged,” the Pirelli statement read. “The process established that there was no production or quality defect on any of the tires; nor was there any sign of fatigue or delamination.

“The causes of the two left-rear tire failures on the Aston Martin and Red Bull cars have been clearly identified. In each case, this was down to a circumferential break on the inner sidewall, which can be related to the running conditions of the tire, in spite of the prescribed starting parameters (minimum pressure and maximum blanket temperature) having been followed.

“As a result of this analysis, Pirelli have submitted their report to the FIA and the Teams. The FIA and Pirelli have agreed a new set of the protocols, including an upgraded technical directive already distributed, for monitoring operating conditions during a race weekend and they will consider any other appropriate actions.”

The suggestion is that the tires were not being run properly while out on track despite having been in the correct state when first put on the car, and Red Bull soon released its own statement in response to the report, reiterating that it followed Pirelli’s parameters.

“We have worked closely with Pirelli and the FIA during their investigation into Max’s tire failure on lap 47 of the Azerbaijan Grand Prix and can confirm that no car fault was found,” Red Bull said. “We adhered to Pirelli’s tire parameters at all times and will continue to follow their guidance.

“We are grateful that following the weekend’s high speed impacts no drivers were injured.”
https://racer.com/2021/06/15/pirelli-id ... -failures/
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#407

Post by Everso Biggyballies »

erwin greven wrote: 2 years ago
Pirelli identifies cause of Baku failures



“The causes of the two left-rear tire failures on the Aston Martin and Red Bull cars have been clearly identified. In each case, this was down to a circumferential break on the inner sidewall, which can be related to the running conditions of the tire, in spite of the prescribed starting parameters (minimum pressure and maximum blanket temperature) having been followed.
https://racer.com/2021/06/15/pirelli-id ... -failures/
So am I following this right? Pirelli are saying that the faults were due to the incorrect running of the tyre.... but they also say that the teams followed precisely the parameters of operation they were given (by Pirelli).
Sounds to me that perhaps Pirelli gave the teams the wrong operating parameters.
Or the tyres Pirelli chose / provided were not suitable for the circuit, temperatures, conditions etc.
Or for there to have been a circumferential break due to a tyre design or construction fault.

Its all very vague and none of it is making Pirelli look good or anything but at fault.

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#408

Post by SBan83 »

Everso Biggyballies wrote: 2 years ago
erwin greven wrote: 2 years ago
Pirelli identifies cause of Baku failures



“The causes of the two left-rear tire failures on the Aston Martin and Red Bull cars have been clearly identified. In each case, this was down to a circumferential break on the inner sidewall, which can be related to the running conditions of the tire, in spite of the prescribed starting parameters (minimum pressure and maximum blanket temperature) having been followed.
https://racer.com/2021/06/15/pirelli-id ... -failures/
So am I following this right? Pirelli are saying that the faults were due to the incorrect running of the tyre.... but they also say that the teams followed precisely the parameters of operation they were given (by Pirelli).
Sounds to me that perhaps Pirelli gave the teams the wrong operating parameters.
Or the tyres Pirelli chose / provided were not suitable for the circuit, temperatures, conditions etc.
Or for there to have been a circumferential break due to a tyre design or construction fault.

Its all very vague and none of it is making Pirelli look good or anything but at fault.
I think what they're implying is that under static conditions, the specified parameters were met but out on track, the way the car's suspension was setup to work ended up overstressing the inside of the tyre. Like excessive camber gain in certain situations.
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#409

Post by Ruslan »

Yea, it sounds like Pirelli is blaming Red Bull and Aston Martin for their set up. I gather the rest of wording means that Red Bull and Aston Martin did not underinflate the tires.
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#410

Post by Ruslan »

Ruslan wrote: 2 years ago Yea, it sounds like Pirelli is blaming Red Bull and Aston Martin for their set up. I gather the rest of wording means that Red Bull and Aston Martin did not underinflate the tires.
Another article on the subject: https://www.grandprix.com/news/italian- ... wouts.html

"The implication is that while Red Bull and Aston Martin followed the letter of the prescribed minimum pressures and maximum tyre blanket temperatures, the teams may have found a work-around.

and

"Too many teams find a way to run with lower tyre pressures than is prescribed."

and

"The problem stems from the fact that the sensors are supplied and developed by the individual teams. In short, each team checks itself."

So...were Red Bull and Aston Martin running the tires under pressure? This seems to be the argument.


Final note: "A few words will be added to the FIA's technical regulations to plug this leak."

So, Red Bull was running illegal wings and illegal tire pressures. Now it will have neither for the rest of the season. Is this the end of the Red Bull challenge?
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