Williams FW33

Rubens Barrichello driving the FW33 at the 2011 Malaysian Grand Prix
Category	Formula One
Constructor	Williams
Designer(s)	Sam Michael (Technical Director) Ed Wood (Chief Designer) Jon Tomlinson (Chief Aerodynamicist)
Predecessor	Williams FW32
Successor	Williams FW34
Technical specifications[1]
Chassis	Carbon-fibre and honeycomb composite monocoque
Suspension (front)	Carbon-fibre double wishbone arrangement, with composite toelink and pushrod-activated springs and anti-roll bar
Suspension (rear)	As front, except pullrod activated rear dampers
Engine	Cosworth CA2011k 2.4 L (146 cu in) 90° V8, limited to 18,000 RPM with KERS naturally aspirated mid-mounted
Transmission	Seven-speed sequential semi-automatic gearbox with reverse gear electro-hydraulically actuated seamless-shift
Weight	640 kg (1,411 lb) (including driver)
Fuel	BP
Tyres	Pirelli P Zero Rays Wheels (front and rear): 13"
Competition history
Notable entrants	AT&T Williams
Notable drivers	11. Rubens Barrichello 12. Pastor Maldonado
Debut	2011 Australian Grand Prix
Last event	2011 Brazilian Grand Prix
Races Wins Podiums Poles F/Laps 19 0 0 0 0

The Williams FW33 was a Formula One racing car developed by Williams F1 for the 2011 Formula One season. It was driven by Brazilian veteran Rubens Barrichello and 2010 GP2 Series champion and rookie driver Pastor Maldonado. The car was shaken down at Silverstone on 28 January 2011, and made its full on-track debut at the Circuit Ricardo Tormo in Valencia, Spain, on 1 February 2011^[2] in an interim testing livery. The definitive livery was released on 24 February, adding white, silver and red to the existing dark blue in a design directly inspired by the Rothmans livery used from 1994 to 1997.

During the course of the season, it became clear that the car was much less competitive than the Williams FW32 as the car tended to lack pace and struggled in races. Both drivers retired from the first two races of the season. In the next three races, both drivers finished, but failed to score any points. This made it the worst start to a season in the history of the Williams team. Monaco saw an improvement in the team's fortunes as Barrichello finished 9th. It could have been a double points finish for the team, but Maldonado retired after a collision with Lewis Hamilton, but was classified in 18th place after finishing more than 90% of the race. The same result also occurred in the chaotic 2011 Canadian Grand Prix where Barrichello finished 9th and Maldonado again retired after he spun off during the race. No more points were to come for the team until Spa, where Maldonado scored his first point with tenth place. This turned out to be the FW33's final point in F1; the team eventually finished the year ninth in the World Constructors' Championship standings, with five points, the team's lowest finish since its inaugural season in 1978.

The car ran with white sidepods with an image of an origami bird in response to the Tōhoku earthquake and tsunami.

• 
  Rubens Barrichello 2011 Spanish Grand Prix, 22 May 2011
• 
  Pastor Maldonado, 2011 Spanish Grand Prix, 22 May 2011
• 
  Pastor Maldonado, 2011 Singapore Grand Prix, 25 September 2011
• 
  Rubens Barrichello during qualifying for the 2011 Italian Grand Prix at Monza, 10 September 2011
• 
  Pastor Maldonado, 2011 Canadian Grand Prix, 12 June 2011
• 
  Pastor Maldonado, 2011 Monaco Grand Prix, 29 May 2011
• 
  Williams F1 Pit Crew and FW33, 2011 Australia Grand Prix, Thursday practice session, 24 March 2011
• 
  Rubens Barrichello, 2011 Australia Grand Prix Qualifying, 26 March 2011
• 
  Pastor Maldonado crash during Malaysian Grand Prix second (Friday) practice session, 8 April 2011
• 
  Pastor Maldonado exiting car after his crash during Malaysian Grand Prix practice session, 8 April 2011

(key) (results in bold indicate pole position; results in italics indicate fastest lap)

^† Driver failed to finish the race, but was classified as they had completed >90% of the race distance.

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