The Brawn BGP 001 is one of the most iconic, glorious, and unusual single-seaters in the history of Formula 1. Born from the ashes of the official Honda team, it dominated the 2009 season by winning both the Constructors’ Championship and the Drivers’ Championship with Jenson Button, only to disappear the following year when the team was sold to Mercedes-Benz. At the end of 2008, amid the global financial crisis, Honda announced its immediate withdrawal from Formula 1, leaving the Brackley facility in West Northamptonshire, England, on the verge of collapse, despite having spent the entire year developing the car for the major 2009 regulatory revolution. Ross Brawn, sensing an opportunity, acquired the team for the symbolic sum of one British pound and renamed it Brawn GP. By early December 2008, the car project (coded Honda RA109) was already 95% complete, designed around the Honda V8 engine and its specific hybrid KERS (Kinetic Energy Recovery System). When Brawn took over the team, he had to urgently find an alternative power unit. The Ferrari option was discarded due to timing and supply constraints, leading instead to an agreement with Mercedes-Benz High Performance Engines for the customer supply of their FO 108W V8 engine. This dramatic change, occurring only three months before winter testing, created enormous mechanical challenges and forced the designers into extraordinary engineering efforts to assemble the car in time.
 |
| BRAWN BGP001, Rubens Barrichello Istanbul, Turkish GP 2009 |
The most important aspect of the new Brawn GP was its aerodynamics. The 2009 regulations imposed a drastic simplification of aerodynamic surfaces, eliminating the old appendages to clean up airflow and encourage overtaking. Development of the car had started extremely early, in 2007, using three wind tunnels operating in parallel thanks to Honda’s immense financial resources before its sudden withdrawal. The former Honda engineers circumvented the restrictions by focusing on the millimetric management of airflow from the front end all the way to the rear diffuser. The BGP 001 featured a wide, flattened, downward-sloping nose. On the underside of the chassis, the shape of the monocoque created an inverted spoon profile functioning as an integrated flow diverter. This shape not only generated downforce directly on the front axle but also directed airflow in an extremely linear manner toward the central floor section. The front wing incorporated outward-shaped endplates designed to push air beyond the front wheels (outwash), reducing the drag generated by tire rotation. In the middle section, the BGP 001 displayed exceptionally clean lines, with sidepods featuring a very deep undercut. The internal cooling masses were arranged at carefully studied angles to reduce the car’s frontal area and minimize aerodynamic drag. The entire front and central aerodynamic philosophy was ultimately dedicated to the operation of the car’s true masterpiece: the double-deck rear diffuser. The engineers discovered a grey area in the regulations, which prohibited continuous openings in the flat floor when viewed from below but did not specify continuity in vertical surfaces. By creating curved openings in the internal channels of the rear crash structure and gearbox casing, Brawn managed to connect the underfloor airflow to a second extraction level located above the standard 175 mm diffuser. This created an extremely low-pressure area that literally sucked air from beneath the floor at much higher speed than conventional diffusers, dramatically increasing aerodynamic downforce.
 |
| BRAWN BGP001, Rubens Barrichello Montecarlo, Monaco GP 2009 |
The adoption of the Mercedes engine required extreme structural solutions. The German V8 had completely different mounting points for both the chassis and gearbox compared to the Honda unit. Engineers literally had to cut and redesign the rear section of the carbon-fiber survival cell through the use of spacers and structural adapter plates. The Mercedes engine also required different pressures, water flow rates, and oil temperatures, so the entire cooling system, from the piping inside the sidepods to the radiators themselves, had to be redesigned from scratch in record time while keeping the external bodywork unchanged so as not to compromise aerodynamics. The gearbox was developed internally by the team, featuring a casing structurally integrated with the channels of the famous double diffuser. However, because the Mercedes engine was slightly longer than the original Honda power unit, the engineers had to shorten the transmission shaft and modify the internal gearbox joints in order to maintain the original wheelbase and weight distribution. Like the original Honda project, the Mercedes package also included KERS capability, but Brawn chose to remove the entire system, saving both budget and approximately 30 kilograms of weight. This gave the designers complete freedom in ballast placement on the car floor to optimize balance. From a kinematic standpoint, the BGP 001 adopted a classic double wishbone push-rod suspension layout both at the front and rear. At the rear in particular, the double diffuser generated such enormous vertical load that the suspension had to be extremely stiff, with strongly anti-squat geometry to maintain aerodynamic platform stability. This stiffness, combined with very linear front suspension geometry, distributed forces across the tires extremely evenly, allowing the Brawns to complete entire race stints without degrading the Bridgestone tires. However, this also created a mechanical drawback, as the car struggled to transfer enough energy into the tires to warm them up during the opening laps or in cold track conditions.
 |
| BRAWN BGP001, Rubens Barrichello Interlagos, Brazilian GP 2009 |
If the Brawn BGP 001 was an engineering miracle, the credit belongs to an extraordinary group of technicians masterfully led by the genius of Ross Brawn (Team Principal). His qualities as an engineer, strategist, and politician emerged in every decision made before and during the season, turning his team into the true surprise of 2009. Jörg Zander (Technical Director) was the structural architect of the car and faced the most difficult task: leading the engineering team responsible for modifying the monocoque and transmission to integrate the Mercedes V8. Unexpectedly, Zander left the team during the season, although by then his work had already been completed. The team’s aerodynamic department was an absolute excellence, supported by three wind tunnels, including the state-of-the-art Brackley facility and the former Dome facility in Japan, used until the final days of Honda management. It consisted of Loïc Bigois (Head of Aerodynamics) and Ben Wood (Chief Aerodynamicist). For historical accuracy, the original concept of the double diffuser should actually be credited to Japanese engineer Yasuhiro Yukimoto, formerly of the Honda satellite team Super Aguri, which collapsed in 2008. Yukimoto proposed the concept to the Brackley engineers before the Japanese team shut down. Wood and Bigois immediately recognized the devastating potential of the idea and integrated it into the main project. Other engineers, most of whom had already been with Honda in 2008, included Jacky Eeckelaert (Engineering Director), Craig Wilson (Head of Vehicle Engineering), Ian Wright (Chief Vehicle Dynamicist), John Owen (Project Leader), Russell Cooley (Chief Engineer), and Masayuki Minagawa (Double Diffuser Concept Lead). On the pit wall there were also two key figures: Andrew Shovlin, Jenson Button’s race engineer, who supported the British driver during the second half of the championship when the car lost its superiority, and Jock Clear, former race engineer during Jacques Villeneuve’s championship-winning season and, in 2009, race engineer for brazilian driver Rubens Barrichello.
 |
| BRAWN BGP001, Jenson Button Hungaroring, Hungarian GP 2009 |
The performance of the Brawn BGP 001 throughout 2009 describes a unique trajectory in Formula 1 history, with the opening part of the season characterized by overwhelming and embarrassing dominance over the competition, followed by a second half spent desperately defending due to the complete lack of development budget. After shocking rivals during the first pre-season tests, where the two Brawns consistently lapped about one second faster than competing cars, the opening phase of the championship saw the British machines deliver flawless performances thanks to the double diffuser and the power of the Mercedes V8. In the first seven races, Button achieved six victories and one third-place finish. As the season progressed, competitors introduced massive upgrades, and from the eighth race onward the Red Bull Racing became the benchmark car, while Brawn GP, with the budget now at the limit and no major title sponsors, could not afford significant developments. Thanks to solid reliability, however, Brawn GP still managed to collect enough points in the final races to allow Jenson Button and the team to secure the World Championships, sealing one of the most astonishing sporting achievements in modern Formula 1 history.
Comments
Post a Comment