STR5 raced the Hungarian front wing spec with the complicated endplates since Singapore .
To reduce a bit the heavy drag loads created at high speeds Toro Rosso added a low height slopping outwards vertical fence at endplate’s horizontal section which was also reverted back to the flat slotted design .
A highly sophisticated front wing was launched at Hungary . The flaps of the wing may look similar to the old spec having now a thicker gurney tab but a closer observation to the endplates details reveals how complicated the new ones are . The endplate’s horizontal section is now vented featuring a small Venturi channel to speed up the airflow passing under it . At the outer side of the Venturi channel there are multiple slots , a similar design also noticed to Renault ‘s endplates .
STR5 used at Valencia ( GP Europe ) the front wing version first presented at Turkey with the longer cascade winglets .
The STR5 front wing’s cascade winglets are actual a combination of three different elements , a double profiled close to the endplates winglet , a middle smaller double profiled section and an inner single flap acting as air stabilizer . That inner section was rejected at Canada because it would create unwanted airflow disturbance at very high speeds .
The front wing raced at Turkey had a new flat endplate horizontal section . The former version featured a wide Venturi channel and offered greater amount of downforce but the new flat one, which is slotted , reduces the car frond end pitch sensitivity making the car more stable and predictable to driver commands .
Toro Rosso added a pair of fences under the nose cone at Hungary to increase the quality of air passing under the nose and towards the underbody aiming to generate more downforce created by the car body .