Williams FW31 - rear diffuser design 02 February 2009
Like engine suppliers Toyota's, Williams' interpretation of the revised diffuser regulations is highly innovative. Much of the diffuser's central section is actually lower than the outer sections. However, clever shaping of the rear crash structure immediately below the rear light effectively creates a second central section (red arrow). In combination, the result is a central section that exceeds the 175mm height allowance that applies to the diffuser alone.