Pirelli Evenst
Pirelli | 3.9.15 | Pneu Pirelli F1
Pirelli F1
15 EVENTS (INCLUDING RACES AND TESTS)
IN ORDER TO
GUARANTEE GREATER SAFETY, PIRELLI PROPOSES
WITH THE FIA TO
UNDERTAKE A STUDY TO OPTIMISE THE WAY
IN WHICH CIRCUITS
ARE CLEANED
Milan, September 3, 2015 – Following the recent technical analysis carried out on the tyres used at Spa, Pirelli concludes that:
1)The tests carried out by Pirelli on the
tyres used at Spa have confirmed the absence of any structural problems.
Pirelli has undertaken in-depth analysis on the materials and production
processes used, utilising two different methods of tests and checks.
Microscopic analysis, carried out on a large number of the tyres after the
second free practice session, showed no signs of fatigue or integrity issues.
The same result was confirmed for the tyres used during the race, which were
cross-sectioned and analysed in Milan. Some of the tyres used in the race were
subjected to a further laboratory fatigue test, passing all the assessments
conclusively and confirming that there was no structural degradation or problem
on-track.
Since the start of 2015, 13,748 slick tyres have been used: including on especially
severe tracks like Sepang, Barcelona and Silverstone. No problems have
ever been discovered, underlining the fundamental solidity of the product.
2)The events of Spa can therefore be put down
to external factors, linked with the prolonged use of the tyres on one of the
most severe tracks of the championship.
The external factors are demonstrated by a total of 63 cuts found in the tread
of the Formula One tyres used over the course of the Spa weekend, following
numerous incidents that took place during the support races before the Formula
One grand prix. In the previous 15 events (10 races and five test sessions) an
average of only 1.2 cuts per event were noted. All this indicates an anomalous
amount of detritus on the track in Spa, with a consequent increased risk of
encountering a foreign object.
If even a small piece of debris – made of carbon or any other particularly
sharp material – penetrates and cuts the various structural parts of a tyre
(which is obviously subject to high-speed use, and more susceptible if used for
a prolonged period) without penetrating the actual structure, this can cause a failure that is different to that found in the event of a normal puncture,
which is characterised by a loss of tyre pressure. And the former was the type
of event seen on Sebastian Vettel’s tyre at Spa.
As for Nico Rosberg, in whose case the tyre usage was less, the tyre held up –
as the footage clearly shows – and the failure was not instantaneous. For four
corners previously, an element of the internal structure of the tyre was
visible, coming out of the tread pattern. This highlighted the existence of the
damage and the consequent start of the tyre’s attrition.
Throughout the Spa weekend (including practice, qualifying and the race) cuts
caused by debris were found on the tyres of other drivers, which damaged the
construction but did not cause any failures.
3)At the end of qualifying on Saturday at
Spa, following the exceptional number of cuts noted to the tyres, Pirelli
pointed out the condition of the circuit to the FIA and asked for it to be
cleaned, as well as for the teams to be told. The FIA reacted promptly in
arranging for the track to be cleaned and advising the teams.
Together with the FIA, Pirelli proposes a study to evaluate the way in which circuits
can be cleaned most effectively.
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