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Brabham BT49
 The BT49C being driven by Piquet at Monaco in 1981 | |||||||||
| Category | Formula One | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Constructor | Brabham | ||||||||
| Designer(s) | Gordon Murray (Technical Director) David North (Chief Designer) | ||||||||
| Predecessor | BT48 | ||||||||
| Successor | BT50 | ||||||||
| Technical specifications | |||||||||
| Chassis | Aluminium alloy monocoque | ||||||||
| Suspension (front) | Double wishbone pullrod | ||||||||
| Suspension (rear) | Double wishbone pullrod or Rocker arm | ||||||||
| Axle track | Front: 1,702 mm (67.0 in) Rear: 1,626 mm (64.0 in) | ||||||||
| Wheelbase | 2,718 mm (107.0 in) | ||||||||
| Engine | Cosworth DFV, 2,993 cc (182.6 cu in), 90° V8, NA, mid-engine, longitudinally mounted | ||||||||
| Transmission | Hewland FGA 400 / Alfa Romeo 6-speed manual | ||||||||
| Weight | 580 kg (1,278.7 lb) | ||||||||
| Fuel | 1979: Agip 1980–1981: Elf 1981–1982: Valvoline | ||||||||
| Tyres | Goodyear / Michelin | ||||||||
| Competition history | |||||||||
| Notable entrants | Parmalat Racing Brabham | ||||||||
| Notable drivers |  Nelson Piquet Ricardo Zunino Héctor Rebaque Riccardo Patrese | ||||||||
| Debut | 1979 Canadian Grand Prix | ||||||||
| |||||||||
| Constructors' Championships | 0 | ||||||||
| Drivers' Championships | 1 (1981, Nelson Piquet) | ||||||||
The Brabham BT49 /ˈbræbəm/ is a Formula One racing car designed by South African Gordon Murray for the British Brabham team. The BT49 competed in the 1979 to 1982 Formula One World Championships and was used by Brazilian driver Nelson Piquet to win his first World Championship in 1981.
The car was initially designed in 1979 as a short notice replacement for the team's Alfa Romeo-engined BT48, after Brabham team owner Bernie Ecclestone decided to end his relationship with the Italian engine manufacturer. The BT49 was created in only six weeks using elements of the BT48 chassis together with the widely used Cosworth DFV engine. The monocoque chassis is made from aluminium alloy and carbon fibre composites. The car was fitted with controversial hydropneumatic suspension and water-cooled brakes at different points in its life.
The BT49 was updated over four seasons taking a total of seven wins, six poles and 135 points. Seventeen were eventually built, most of which survive today. Some are used successfully in historic motorsport; Christian Glaesel won the 2005 FIA Historic Formula One Championship driving a BT49D.
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