Nasr: Very difficult without tyre blankets
9 April 2014 – Williams reserve Felipe Nasr described as "very difficult" his first experience of 2015's proposed tyre warmer ban, having dedicated his day of running at the post-race Bahrain test to development work for Pirelli.
Next season, Formula 1 teams are set to compete without the assistance of heating devices, which has recently been questioned by sole supplier Pirelli amid doubts over its capability to design and produce a safe product.
"Running a Formula 1 tyre when it hasn't been in a blanket was one of the most interesting things as it's very difficult to get them up to temperature, even in the Bahrain heat," Nasr explained as the test concluded.
He added: "It will be even more of a challenge at tracks such as Silverstone or Spa-Francorchamps."
Mercedes and Caterham also carried out work for Pirelli at the Sakhir circuit, with the sport's eight other teams to share responsibilities at the three remaining post-Grand Prix tests in Spain, Great Britain and Abu Dhabi.