 To achieve this, about 40% of the downforce is produced from the underside, with full length ground effect tunnels, similar to a GP2 car.The aerodynamics have been developed using the Williams F1 computational fluid dynamics (CFD) computer simulation which enables many different configurations to be tested without the need to actually build the parts and test in the wind tunnel.The car will have over of downforce at – compared with, for example, an F3 car which would generate .