The FW31 was constructed for 2009 Formula 1 season according new regulations which restricted rpm to 18000 and introduced Kinetic Energy Recovery Systems (KERS). The car designed by Sam Michael (Technical Director), Ed Wood (Chief Designer), and Jon Tomlinson (Chief Aerodynamicist) was powered by Toyota RVX-09 engine and used Williams Hybrid Power’s patented Magnetic Loaded Composite flywheel KERS system. The car was driven by Nico Rosberg who was in his fourth season with the team, and Kazuke Nakajima who drove for Williams in 2008. Williams FW31 was one of three cars (along with Toyota and Brown) to have a speed advantage early on because it featured a double diffuser system. The car was not fastest in the peloton, but was very reliable and Nico Rosberg proved to be a consistent challenger for points. Rosberg finished 16 out of the season’s 17 rounds achieving a season-best result of fourth at the German Grand Prix and the following Hungarian Grand Prix. Nico scored 34.5 points and was placed seventh in the Drivers’ Championship, while Nakajima failed to score a single point in his last season in F1.
|Nico Rosberg||16||AT&T Williams|