Red Bull team principal Christian Horner says Renault is "making good progress" with its power unit development and wants improvements fast-tracked.

Renault failed to make any noticeable step forward with its power unit at the start of the season and Red Bull has been off the pace, failing to score a podium at any of the opening nine rounds of the season. Horner says work on Renault's engine on the dyno has shown encouraging signs but has urged the French manufacturer to deliver any gains as soon as possible.

"As far as I am aware I think that they are making good progress on their dyno," Horner told the official Formula One website. "They now have some strategic decisions about implementation, and the direction they want to take their development for the rest of this season - and that has an enormous impact on next year.

"Of course it tests our patience. Like any competitive team we want performance yesterday, and unfortunately with engines the lead time is a lot longer than with the chassis. Patience is something that we are not really good at. We want to have performance as soon as possible..."

However, Horner says realistically Red Bull is likely to have to wait until after the end of the European season to receive any updates.

"From where the concept is at the moment you are probably looking at least at a couple of months. Two to three months. It needs to happen this year - but also what you learn this year will help you next season."

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Andrew Lewin

Andrew first became a fan of Formula 1 during the time when Michael Schumacher and Damon Hill were stepping into the limelight after the era of Alain Prost, Nigel Mansell and Aryton Senna. He's been addicted ever since, and has been writing about the sport now for nearly a quarter of a century for a number of online news sites. He's also written professionally about GP2 (now Formula 2), GP3, IndyCar, World Rally Championship, MotoGP and NASCAR. In his other professional life, Andrew is a freelance writer, social media consultant, web developer/programmer, and digital specialist in the fields of accessibility, usability, IA, online communities and public sector procurement. He worked for many years in magazine production at Bauer Media, and for over a decade he was part of the digital media team at the UK government's communications department. Born and raised in Essex, Andrew currently lives and works in south-west London.

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