In Malaysia R31 reverted back to the beam wing version with the lower arched centre zone , which was tested before season starts . In Australia the R31 chose to race with a taller design to maximize downforce production .
In Malaysia a metal joint was placed in the centre of the slotted tab to secure its stiffness . Excessive vibrations of an element ruins its aerodynamic or mechanic effectiveness and can even cause it to crack in some occasions .
The diffuser was again revised in Australia despite the latest upgrade at Barcelona test , having now a new slotted tab under the crash structure to let air bleed through . The pioneer of the slotted tab feature is credited to Toro Rosso and Renault is another team ( along with Red Bull and Mc Laren ) to copy this idea .
Renault seems to follow the same frenzy front wing development path like it did last season and launched a new front wing iteration in Sepang . The wing may had new endplates but the flaps remained though unchanged . The revisions are spotted on the front part of the endplate body which is now consisted of a single element instead of two with its base to be inclined outwards creating a large gap between its inner surface and the double profiled mini wing . The horizontal winglet is also gone while the outer low height vertical fence is new and features a deep cut on its lower rear part . All the changes focus to reduce turbulence around the outer front tyre surface .