2015 Jerez pre-season testing technical image gallery - Day 3

Some fantastic images courtesy of Sutton Images from day 3 of testing in Jerez

 Ferrari SF15-T - A kiel probe array is placed behind the front tyre to measure the wake, correlating the information the team produced the car with.

 Williams FW37 rear end detail

 Toro Rosso STR10 rear end detail, note the area had previously had flo-viz applied

 Mercedes W06 whilst the track was still damp in the morning, note the sparks being created by the titanium skids as the floor contact with the circuit, whilst the dampness is being upwashed by the diffuser etc.

 Sauber C34 sparking as the titanium skids impact with the track

 Nice rear detail shot of the SF15-T

 Note the hollow blown front axle on the SF15-T, air captured by the front brake duct which has inlets within that send airflow into different regions such as the caliper, disk, one of these on the SF15-T sends airflow to the hollow axle.  The airflow dispatched by the axle helps with conditioning the flow around the front tyre, taking some of the burden off the front wing.

 This shows McLaren's new wheel design and like the Ferrari above the hollow blown axle being employed by the team

 McLaren, able to put in a little more mileage in Jerez today tried out the other variant of rear wing endplate the team showed at the launch

 Toro Rosso STR10 with flo-viz applied, I don't know the story on the attached black bag yet by the way, but I'd assume it wasn't supposed to be attached

 SF15-T with flo-viz applied to the nose and chassis

 Toro Rosso STR10 rear end detail

 

 Sauber C34 - rear end detail, note the inset shows the 'U' shaped diffuser outlet as used by McLaren and Mercedes last season.  When the teams lost the ability to use exposed starter motor holes in 2014 it presented some new challenges as the teams had for a number of years used the airflow coming through them to aid in attachment.  The central section of the diffuser has a higher angle of attack so is more prone to stall at certain speeds/ride heights and so a little assistance can only help improve performance.  Some teams took to using small vortex generators at the trailing edge of the skid block to overcome this in a different way too.  I still need more solid proof but from this image it appears however that Sauber are also doing something a little different with an opening at the leading edge of the 'U' allowing flow coming around the boat-tail to converge with the upper part of the U.  (The lower section of the U has been isolated for the starter to be inserted).  If I am right about this its not to say it will provide a massive uplift in terms of performance but could help to provide a transition in terms of airflow attachment.

 Sauber C34 - Another shot of the rear end of the C34

 Red Bull RB11 - Flo-viz applied to the side of the chassis to correlate what was being seen in CFD/Wind Tunnel

 Williams FW37 splitter covered with flo-viz to check the flow in the region

 Nice forward shot of the FW37

Williams FW37 - the team have added vortex generators to the leading edge of the sidepod

The Lotus E23 airbox which as you can see sports several different outlets