PNSD wrote:Did not Renault cite one of the reasons they lost performance from 2007 onwards was because of incorrect wind tunnel calibration, and CFD modelling relating to the change in profile from Michelin to Bridgestone? It was a problem which took years to sort they said.
Perhaps they did. But there are indicators that the mechanical constructions of the Michelins and Bridgstones differed substantionally. The difference required the c.g. to be moved forward for mechanical, rather than aero reasons. Aero changes followed, rather than lead, the c.g. change. The history of the 2007 onwards Bridgstones has already been aired in these forums.