Pirelli manager Mario Isola has downplayed concerns regarding the movement to softer substances for its 70th Anniversary Grand Prix in Silverstone after the failures at last weekend’s British GP.
Pirelli’s evaluation of this front-left failures in the Formula 1 cars of Lewis Hamilton, Valtteri Bottas and Carlos Sainz Jr has affirmed that the unusually lengthy stints run following motorists produced premature stops beneath the safety car resulted in the failures, that generated a situation which Isola known as a”storm”
The Italian firm has stuck with all the first choice to proceed into the C2, C3 and C4 stove – leaving the C1s that collapsed last weekend – however will support increased pressures. The minimal front strain will probably be upward by 2psi, and also the back by 1psi.
Isola insists that milder chemicals will not create any additional risk since the tyre compound didn’t have an influence on the failures endured on Sunday.
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“The analysis states that the origin of the primary lack of pressure and the deflation was that the degree of strain around the tyre, on the building of the noodle,” Isola explained. “And for this reason the actions we’re taking for another race is to boost the pressure, since clearly it’s the pressure that’s helping the building.
“And we maintain the very same chemicals, C2, C3 and C4, which have already been determined a couple of weeks ago. The tread compound isn’t impacting in any way what occurred on the tyres.
“I really don’t wish to use the word ideal storm, since I do not enjoy it, but the simple fact that the safety car was out on lap 12, was compelling everybody to modify on lap 12. In an ordinary scenario, a normal plan was supposed to change for automobiles which were targeting a one-stop strategy at lap 18-20.
“Consider also that if you comply with a security car the strain is moving down, then clearly in the restart of the security car, there’s a period where the strain develops.
“In the restart of the security car you’ve got an extremely speedy corner, with a great deal of energy that’s entering the tyre. We usually think about that in our opinion, once we provide the prescriptionswe believe all that. Plus it had been verified from telemetry data the degree of electricity was very, very large.
“Hence the security car in addition to the very long stint in addition to how the structure with less tread is not as secure caused an initial reduction of pressure, along with the reduction of pressure contributes to a deflation. When you have a look at the tyres they’d both sidewalls still set up in the ideal place, along with the tread ring has been broken, that’s the normal situation if you operate the tyre flat”
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Isola states the transfer to softer substances will automatically induce teams to conduct shorter stints next week, with a number of stops anticipated.
“I feel that since we’re going with a single measure milder chemicals the period of this stint will be shorter by definition since the chemicals are milder.
“Consider the moderate compound that’ll be the difficult for this particular weekend, the only one which has been operating 36 laps was Grosjean, and tyres were totally completed. I struggle to think they can conduct over 30-something laps next week ”
Isola verified that lots of cars ended with cuts in their tyres, a problem not related to the Mercedes and McLaren failures.
Red Bull boss Christian Horner said on Sunday the group removed Max Verstappen’s car at his late night halt had several cuts, indicating the Dutchman’s could have experienced a collapse had he never pitted in his attempts to get quickest lap.
“It is correct that we listed a large number of cuts, in some instances they had been shallow, in some instances they were very profound,” explained Isola.
“The large number of cuts has been listed particularly on the tyres in the next stint. I feel that the parts of front wing dropped by Kimi Raikkonen has been the primary reason for these cuts on the tyres.
“We had one tyre, if I remember well it was front left from [Nicholas] Latifi, using a puncture. The tyre was losing atmosphere when he was coming back into parc ferme. I affirm that there was debris on course, I affirm we discovered several reductions.
“Also in the tyres used in the first stint, likely from the injury of Kvyat. However, I believe we arrived at the conclusion that the cuts weren’t accountable for what occurred to the tyres of Mercedes and Carlos Sainz.
“It’s apparent with a high amount of wear the majority of the tyres were near 100% wear, with no rubber onto the tread, that’s exposing the structure, the structure is not as secure, and any influence on the structure has another impact. As well as any bit of debris is much more harmful, as it can reduce the structure, and so cause a collapse.
“But to let you know if the cuts Max’s tyre were large enough to prevent him an extra pit stop is hard to say.”