Sauber C31 – ducted rear floor
Sauber rushed to optimize further the rear end of the C31 and raced at Melbourne a ducted floor in front of the tyre profile . Ducted rear floor is not a new idea in Formula 1 and was a common feature a couple years ago . The duct is within FIA technical regulations because it is situated outside of the area of the 900 mm wide floor continuous surface , something that article 3.7.6 imposes . It is believed that the duct feeds the diffuser with air coming above the floor level , air that is strengthened further by exhaust gases that bent downwards due to the special shape of the bodywork behind the exhaust pipes (down-wash effect) .
A logical step forward to enhance the effect of the design would be the following
– two channeled sculpted bodywork ,behind the pipe , with the outer channel to expand further outwards .The expansion of the channel without dividing it into two would ruin somehow the direction control of the dpwnwash effect
– new vertical floor fence with a benting inwards leading edge
Finally Sauber paid extra attention to the car’s cooling efficiency at very hot and moist Sepang circuit and added two slits close to the exhaust area , pointed with a yellow arrow in first illustration .
- Sauber C31 – Rear end improvements at Jerez test (formula1techandart.wordpress.com)