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Toro Rosso STR5 and Red Bull RB6 – Born sisters but grown different


 

Toro Rosso built its 2010 contender the STR5 using its own sources for the first time rather than copying the designs of the sister Red Bull team.  Nevertheless STR5 is not a completely new car as it bears similarities to the STR4 and the RB6 especially at season start .  The differences were becoming more and more during the season as Red Bull and Toro Rosso followed completely different development paths .

 

Internal Differences

Toro Rosso   STR5 Red Bull RB6
Engine Ferrari V8  Type 056 Renault V8 RS27 – 2010
Lubricant Shell Helix Ultra Total Group
Oil Shell Total Group
Fuel Shell V-Power Total Group
Brakes Brembo (calipers, pads and discs) Brembo (calipers, pads and discs)
Clutch Sachs triple-plate pull-type AP Racing
Wheels Advanti Racing OZ Racing
Gearbox 7-speed+1 reverse , different from RB6 7-speed+1 reverse
Dampers Sachs

 

Major visual Differences

Toro Rosso   STR5 Red Bull RB6
Season start Season end Season start Season end
Exhausts periscope Close to floor EBD Close to floor EBD Close to floor EBD , but quite different
Sidepod Panels wide Wide

( no change)

Wide but becoming slimmer to the bottom Slim
Floor large side fences large side fences

( no change)

no side fences no side fences

( no change)

Vented rear floor No vent No vent No vent Double vented
Rear central hot air outlet Smaller elliptical Very Slim across the engine cover end line Large oval shaped Large oval shaped
Front wing Longer cascade winglets Developed but different from RB6 Shorter cascade winglets Heavily developed
Nose cone camera winglets At nose con tip , hammerhead shark configuration , similar to RB6 Nose con tip

( no change)

At nose con tip Behind the front wing’s central section
Nose cone hole Yes ,  a bit larger than the RB6 no Yes , oval shaped yes
Mirrors inboard inboard outboard Inboard
Rear suspension Pull rod design

(different from the RB6)

Pull rod design Pull rod design Pull rod design
F-duct No F-duct Yes , F-duct is air-fed via an inlet located behind the airbox no Yes , F-duct is air-fed via airbox
Under nose cone fences no yes no no
Floor splitter Similar to RB6 with side fences No change with side fences Changed and become more complicated
Diffuser Double decked but different from RB6 Developed Double decked Heavily developed
Rear car end Taller than the RB6 No change Lower than the STR5 No change

 

 

 

 

 

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Toro Rosso STR5 – Rear wing of reduced chord for Brazil


 

The rear wing raced at Brazil was of the same design to the previous version but of reduced chord ( see the large gap between the two flaps )  as Interlagos is a track of lower downforce level .To reduce drag the second flap was cut off close to the endplates .

Toro Rosso STR5 – Back to Hungarian front wing spec since Singapore


STR5 raced the Hungarian front wing spec with the complicated endplates since Singapore .

Toro Rosso STR5 – Further modifications to the front wing at Monza


Monza

 

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 .

Toro Rosso STR5 – Heavily revised front wing endplates at Hungary


New

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 .

Old


Toro Rosso STR5 – Exhausts development during season


STR5 throughout 2010 season raced three different exhaust outlets configurations .which are the following

Periscope , blowing between the suspension wishbones

( launch , Australia , China)

Periscope surrounded by bodywork , to improve car’s cooling

( Bahrain , Malaysia , Spain to  Belgium   )

Close to floor ( Exhaust Blown Diffuser ) to blow and energize diffuser boosting downforce production

( Italy to Abu Dhabi )

Toro Rosso STR5 – Ultra low downforce rear wing at Monza


 

Toro Rosso like all teams but HRT , developed a special ultra low downforce rear wing for Monza . The wing remained double profiled with the upper profile retaining the central slot . On the contrary the endplates lost the gills , in a different approach to Canada where endplates kept the gilled configuration .

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