In slow and high downforce street track of Monaco , HRT F111 inherited an extra single element winglet over the rear light to increase the stability of the rear end . Nevertheless during the whole weekend the team faced balance problems on both cars , problems difficult to be delt properly due to reduced amount of free running . Luckily for the team both drivers managed to finish race , something really important for HRT .
More rear wing revisions took place at Turkey with a series of 5 curved gills were put on the endplates to lower significantly drag production generated by the wing , with a small downforce loss as a side effect but giving more freedom for steeper attack angles at the same time . This was the first serious upgrade for the rear wing as the previous were only refinements of the original version .
F111 rear wing is consisted of a rather large movable flap compared to other teams with a black colored tab fence (1) across the trailing edge , two flap fasteners (2) , gill-less endplates and finally the wing is supported on a single vertical element (3) which also houses the flap moving mechanism .Having a closer look on the endplates we can observe the uncovered flap angle adjuster (4) and the flap connecting spots (5) to the endplate body .
In China HRT decided to put elegant white colored coverings on rear wing’s flap adjusters to cut turbulence created by the anomalies on endplate surface . Meanwhile the two lower dot style flap connectors to the endplate were already covered since Malaysia( red arrows ) .