Why did the flywheel hybrid system never catch on for road cars?

Enlarge / Why did the flywheel hybrid never catch on for road cars? GKN/Jonathan Gitlin When a Speed network television crew interviewed Margo T. Oge, then-director of the Environmental Protection Agency’s Office of Transportation and Air Quality, during the 10-hour-long 2010 Petit Le Mans Series race at Road Atlanta, Porsche’s experimental 911 GT3 R Hybrid …

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