Red Bull Racing saw its second day of pre-season testing in Valencia hit by installation problems which limited Mark Webber to just 17 laps on track in the new RB7.

The defending champions planned to split driving between Webber and Sebastian Vettel on the second day of the Spanish test, with Vettel taking to the track to continue with his programme during the morning.

The German managed to completed a total of 43 laps before handing the car over to Webber, although he saw his time on track hit by installation problems and was unable to set a representative lap time as a result.

It left Webber down in 13th place although Vettel was second quickest behind Fernando Alonso's Ferrari.

"I didn't get so long in the car today, so we will start the real work tomorrow," Webber admitted. "There was a bit of a problem with the installation, something with the pedals, so it took a bit longer than we expected. It wasn't the smoothest day, but we're back tomorrow - it's great that the guys have got the car here for the first test and I'm looking forward to driving it more."

Head of engineering Ian Morgan admitted it was disappointing for Webber to miss out on track time, although he said the team's earlier running had gone to plan as the team worked on system checks and aerodynamic development with Vettel in the morning.

"Sebastian pretty much ran to schedule this morning; there were a few minor delays, but nothing significant," he said. "Unfortunately we lost some time changing drivers this afternoon due to some driver installation issues. Once Mark's testing session got underway, he was able to complete two runs and begin acclimatising to the new car."

To view times from testing, CLICK HERE.