Craig Scarborough and Peter Windsor detail the closely-guarded "cartridge" gearbox structure that has become a trademark element of the all-conquering Mercedes powertrain. How important is this elegant piece of engineering in the overall scheme of things? Important enough, Scarbs believes, for many teams to be copying the system for 2015. Our exclusive analysis features original, explanatory drawings by Craig and an explanation of why this is structure is so much more than simply "a gearbox".
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Images courtesy of: Caterham F1, Sahara Force India, Lotus F1, McLaren-Mercedes, AMG Mercedes Petronas, Pirelli, Infiniti Red Bull Racing-Renault, Sauber-Ferrari and Scuderia Toro Rosso-Renault’