F1: Red Bull ends Jerez test early

Red Bull called an early end to its troubled week of Formula 1 testing at Jerez in Spain on Friday.

The reigning world champion outfit has had a nightmare four days with its RB10, after suffering a spate of overheating and power unit problems.

Race drivers Sebastian Vettel and Daniel Ricciardo managed just 21 laps over the four days of testing at Jerez. On Friday, in a bid to cure the overheating, it opened up extra vents in its sidepods to try to help matters. Despite making a little progress, it was then stopped by an unspecified mechanical failure on the car that meant it called time on its running at mid-day.

Team principal Christian Horner remained upbeat that, despite the troubles of the week, Red Bull could make significant progress before the next test in Bahrain.

"It's been a very difficult test," he said. "We have had numerous Renault issues as well as chassis cooling issues, which have affected our progress. However, despite the lack of mileage, what we have managed to learn shows that the problems should be solvable for the next test in Bahrain.

"Part of the purpose of this early test was to learn about any issues ahead of the start of the season and there will now be a lot of focus on the dyno over the next few weeks."

Finding a cure...