I have always liked the technical aspects of racing and felt that understanding the engineering aspect would work in my favour. Sure enough, I managed to beat drivers who were probably more talented than me because I understood better how the car works. For me, this was always as important as the driving skills.
Probably the years that I learned the most in my racing career were in 2011-12, when I was developing the Pirelli tyres for Formula 1. We used the unraced Toyota chassis, then in 2012 the Lotus. It was the best school, driving good F1 cars, learning the intricacies of tyres and having the engineers there to exchange ideas. In Formula E now you do around 2000km a year, so I did almost five seasons worth of testing! It was very useful in the next years of my career and gave me a lot of insights I wish I’d had when I started in F1.
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We were using 20 sets per day – I think one day at Monza I used 26 sets and drove around 1000km – and these included tyres with very different configurations. We even tried tyres that were already cambered, which I didn’t know existed.
Instead of being completely symmetrical, the internal side had a smaller radius. Then there were different thicknesses of walls, different compounds and construction. We tried lots of combinations to see which tyres blistered or grained, and which tyres didn’t, across circuits with varying degrees of surface roughness, and some of them put more energy into the tyres than others.
Ultimately, it wasn’t up to me to decide the tyres that got carried forwards. Tyres that are softer normally degrade faster and lose lap time more quickly than harder tyres, and there is a crossover point where the harder tyres are faster. But many times we tried a tyre where the degradation was actually better; it was softer, faster and lasted longer. But this tyre was probably discarded from the batch because you needed a tyre that matched F1’s brief.
It wanted to move away from what we’d had during my 2010 season on the Bridgestone, which was a very conservative, stable tyre. We weren’t looking to find the best tyre; it was more about putting them in a window and giving F1 the possibility to choose which ones they wanted to have.
Source: Autosport