McLaren continue to make tiny steps at improving the MP4-29 toward the end of the season and as you can see when comparing the image taken above (by Giorgio Piola), with the one used previously, we can see that some small notches have been removed from both the trailing edge of the Endplate and the most rearward wing element. You'll note that the notches are not new just enlarged and so it seems that the team are keen to make these ad-hoc changes in order to increase how the flow moves around the front tyre. I'd be interested to know if they went to the expense of making a new endplate for this test as in reality a dremmel may well have dealt the same blow. However we can see that the shaping of the rear wing element has been re-designed, with the outer portion now forming a sort of Gurney, further enhancing the way in which the airflow is outwardly turned.
Sochi. The team ran an extravagant set of pitot tube arrays (above) during FP1 not only to assess the enlargement of these notches but to understand how the car will behave next season, as they trialled titanium skids.
I'd suggest that @McLarenF1 are trialling the titanium skids to be introduced in 2015 pic.twitter.com/dlJR6AgZn2
— Matt Somerfield (@SomersF1) November 7, 2014
Kev's been testing titanium skid blocks during this morning's session - hence the sparks! #FP1 #BrazilGP
As we can see the upshot of using titanium skids (for the fans at least) is that we also get the spectacular effect of a bygone F1 era.
— McLaren (@McLarenF1) November 7, 2014