From the CFD analysis of the vehicle it was established that a lift coefficient of -0.87 could
be obtained from an under-tray design consisting of three rear diffuser tunnels, and one either
side in front of the rear wheels. Exiting the exhaust flow into to each of the outside rear
diffuser tunnels through a 20mm diameter pipe produced a 34.5% increase in the amount of
downforce produced by the model.
The wind tunnel testing of a half-scale model determined that a lift coefficient of -2.36 was
able to be obtained with the inclusion of a front and rear wing to the under-tray and body
designed using the CFD programs. It was found that the centre of aerodynamic load for threeelement
front and rear wing configurations was able to be adjusted so that a weight split
ranging from 43% on the front wheels and 57% on the rear to 33% on the front and 67% on
the rear, could be obtained with a rear wing height of 495mm above the belt