Patrick Head, the former director of engineering for Williams, believes that the new hybrid F1 engines are "far too expensive".
Head was the co-founder of the Williams Formula 1 team in the 1970s but resigned as director of engineering in 2012. However, he continues to work with Williams Hybrid Power Limited.
Speaking to Tom Clarkson, Head says that Formula 1 should be more about the drivers and entertainment than demonstrating the benefits of hybrid technology.
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