TORO ROSSO STR5 Ferrari

   Until 2009, Toro Rosso had relied on chassis designed by Adrian Newey and developed by Red Bull Technology. However, with the introduction of the 2010 regulations prohibiting customer chassis, the Faenza-based team was forced to design and manufacture its car entirely in-house for the first time. This major transition required a significant expansion of both the Faenza headquarters and the Bicester wind tunnel, enabling the team to produce a completely self-designed Formula One car. The result was the Toro Rosso STR5, powered by the Ferrari 056 V8 engine and driven by the two young drivers retained from the previous season, Swiss driver Sébastien Buemi and Spaniard Jaime Alguersuari. Having evolved into a fully independent constructor, Toro Rosso's technical department faced the considerable challenge of rapidly expanding its capabilities to cover responsibilities that had previously been handled by Red Bull Technology. Team Principal Franz Tost entrusted these duties to a highly qualified group of engineers.

TORO ROSSO STR5, Sébastien Buemi
Hungaroring, Hungarian GP 2010

   Giorgio Ascanelli (Technical Director) was the undisputed technical leader of the STR5 project, overseeing the reorganization of the design department and establishing the infrastructure necessary to conceive, manufacture, and develop the carbon-fibre monocoque and aerodynamic package entirely in-house. Laurent Mekies (Chief Engineer) played a crucial role in trackside operations, coordinating car setup, on-track development, and the correlation between simulator data and real-world performance. Ben Butler (Chief Designer) supervised the physical design of the carbon-fibre chassis and the integration of the mechanical components and Ferrari 056 V8 engine. Nicolò Petrucci (Head of Aerodynamics) led the CFD simulation and wind tunnel programmes, tackling the complex challenges posed by the double diffuser and, later in the season, the implementation of the F-Duct system. Paolo Marabini (Chief Engineer, R&D and Structures) was responsible for structural integrity, crash testing, and monocoque durability, while Matteo Piraccini (Chief Engineer – Systems) headed the development of the car's electronics, hydraulics, and onboard systems integration.

TORO ROSSO STR5, Jaime Aguersuari
Suzuka, Japanese GP 2010

   The STR5's aerodynamic philosophy perhaps best illustrates the magnitude of the challenge faced by Toro Rosso in 2010. Moving away from Adrian Newey's designs and developing an entirely original aerodynamic concept between Faenza and Bicester represented a true baptism of fire for the small Italian outfit. The STR5's shape differed noticeably from that of the Red Bull RB6: while Newey pursued highly aggressive aerodynamic solutions, Ascanelli opted for a more pragmatic approach, focusing on a stable, predictable platform that was easier to understand and fine-tune. The 2010 ban on refuelling during races forced the aerodynamicists to redesign the entire central section of the car to accommodate a fuel tank holding more than 200 litres. This required a significantly longer wheelbase in order to avoid excessively widening the front section, while the sidepods had to house larger radiators to cool the Ferrari V8 engine. The nose was high and flat, adopting the now familiar V-shaped profile seen on many contemporary Formula One cars. The radiator inlets retained a relatively square design, while the elongated sidepods featured a less pronounced undercut than many of their rivals. The STR5 was conceived around the double diffuser concept introduced during the second half of the 2009 season. Exploiting loopholes within the regulations, the engineers integrated additional airflow channels into the central and rear sections of the floor to extract a greater volume of air from beneath the car. Unlike Red Bull, which successfully reintroduced blown diffuser exhausts, Toro Rosso retained a conventional exhaust layout throughout the season, positioning the exhaust outlets high up and directing them towards the rear wing. This conservative approach prioritised thermal reliability over the additional downforce that blown exhausts could generate. At the beginning of the season, McLaren disrupted the competitive order by introducing the revolutionary F-Duct, a driver-operated airflow system capable of stalling the rear wing and increasing straight-line speed by approximately 8–10 km/h. Toro Rosso was forced to develop its own version, which made its debut midway through the championship. Since the system had not been incorporated into the original chassis design, its cockpit integration was less refined than McLaren's solution, but it nevertheless provided a noticeable improvement in top speed at high-speed circuits such as Spa-Francorchamps and Monza.

TORO ROSSO STR5, Sébastien Buemi
Silverstone, British GP 2010  

   Mechanically, the STR5 had to successfully integrate the Ferrari 056 V8 into a chassis designed entirely from scratch in Faenza while delivering the reliability essential for a midfield team that could ill afford retirements caused by mechanical failures. Under Giorgio Ascanelli's leadership, the engineering department adopted proven mechanical solutions that prioritised ease of setup and maintenance at the circuit. The front suspension employed a double wishbone push-rod layout, with the spring and damper assemblies mounted horizontally above the chassis inside the nose. A push-rod configuration was also chosen for the rear suspension. Although it offered fewer aerodynamic advantages than a pull-rod system, it simplified mechanical setup procedures and reduced assembly times for the mechanics. Sachs-supplied dampers and adjustable anti-roll bars provided a wide range of tuning options for controlling both roll and pitch, which proved essential for maintaining a stable ride height despite the significantly increased fuel loads introduced by the refuelling ban. The Ferrari V8 served as a fully stressed member, directly connecting the carbon-fibre monocoque to the gearbox. The transmission itself was designed and manufactured by Toro Rosso, featuring a hybrid titanium and carbon-fibre casing that delivered exceptional torsional rigidity to the rear of the car. Considerable effort was also devoted to the design of the brake ducts and brake drum assemblies to ensure that excessive heat generated by the braking system was prevented from transferring to the wheel rims and overheating the Bridgestone tyres.

TORO ROSSO STR5, Sébastien Buemi
Istanbul, Turkish GP 2010 

   Despite the fundamental quality of the design and the encouraging reliability demonstrated during pre-season testing, once the championship began the STR5 established itself as a solid midfield contender but remained clearly behind both the leading teams (Red Bull, Ferrari, and McLaren) and more established midfield competitors such as Force India, Williams, and Sauber. During the opening rounds in Bahrain, Australia, Malaysia, and China, the STR5 proved to be a dependable and reliable package, although it still lacked the ultimate one-lap pace required to challenge consistently for the top ten. As the season progressed, the car delivered its strongest performance at the Canadian Grand Prix, where Sébastien Buemi secured eighth place, Toro Rosso's best result of the year. As rival teams successfully introduced increasingly sophisticated upgrades, including low-blown exhaust systems and more refined F-Duct concepts, Toro Rosso struggled to maintain the same pace of aerodynamic development. Limited human resources, combined with the immense workload associated with the team's first season as a completely independent constructor, meant that appearances in Q3 and points-scoring finishes became increasingly rare during the second half of the championship. Although the final tally of 13 points and ninth place in the Constructors' Championship may appear modest, the 2010 campaign represented a significant milestone in Toro Rosso's history. The STR5 proved that the Faenza team possessed the technical capability to design, develop, manufacture, and race a reliable Formula One car entirely on its own, without direct support from Red Bull Technology, laying the structural and engineering foundations upon which its future success would be built.