Brabham BT45

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Brabham BT45
Brabham BT45B
Brabham BT45C

The Brabham-Alfa Romeo BT45 of Rolf Stommelen at the 1976 German GP
Category	Formula One
Constructor	Brabham
Designer(s)	Gordon Murray Carlo Chiti (Engine Designer (Alfa Romeo))
Predecessor	BT44
Successor	BT46
Technical specifications[1]
Chassis	aluminium monocoque
Suspension (front)	double wishbones, pull-rod actuated coil springs over dampers, anti-roll bar
Suspension (rear)	single top links, twin lower links, twin radius arms, coil springs over dampers, anti-roll bar
Axle track	Front: 1,448 mm (57.0 in) Rear: 1,524 mm (60.0 in)
Wheelbase	2,464 mm (97.0 in)
Engine	Alfa Romeo 115-12 and Ford-Cosworth DFV 2,995 cc (182.8 cu in), Flat-12 NA, mid-engine, longitudinally mounted
Transmission	Hewland, Brabham 6-speed manual
Fuel	1976-1977: FINA 1978: Agip
Tyres	Goodyear
Competition history
Notable entrants	Martini Racing Parmalat Racing Team
Notable drivers	Carlos Pace Carlos Reutemann Rolf Stommelen John Watson Hans-Joachim Stuck Niki Lauda
Debut	1976 Brazilian Grand Prix
Last season	1979
Races Wins Poles F/Laps 36 (all variants) 0 1 2
Constructors' Championships	0
Drivers' Championships	0

The Brabham BT45 was a Formula One car designed by South African engineer Gordon Murray for the 1976, 1977 and 1978 Formula One seasons.

The car was the first Brabham to use Alfa Romeo type 115-12 flat 12-cylinder engine with 500 hp (373 kW) and 340 N⋅m (251 lb⋅ft) of torque. It was equipped with a Hewland six-speed transmission. It used the front air intakes of the previous Brabham, but by regulation no longer has the air brooms behind the cockpit and has side panels with larger air intakes to feed the engine and more radiant surfaces. The frame was an aluminium monocoque, while the braking system was constituted by ventilated disc brakes produced by Girling. The front suspension consisted of double wishbones with pull-rods, coil springs and stabilizer bars, while the rear used coil springs and stabilizer bars. For the 1978 season, pending the development of BT46, a C version of the BT45 was created. This model was equipped with a revised radiator.

The BT45 had its first start at the 1976 Brazilian Grand Prix in the hands of Carlos Pace and Carlos Reutemann. They suffered reliability problems, especially the engine. During the first season, the best results were three-fourth places.

In 1977 Pace finished second in the first race and led for thirteen laps in South Africa with the BT45B, and died a few days later in a plane crash. His teammate, John Watson, drove to the pole at the Monaco Grand Prix but was passed on the first lap by Jody Scheckter's Wolf, after that he spent more than half of the race in second position, before retiring with gearbox problems. He then took second place in France, and Stuck gained two podiums, in Germany and Austria. Its results allowed the German to finish 11th overall in the Championship.

The BT45C competed in two Grands Prix in 1978, before the arrival of the BT46. With this latest release, Niki Lauda achieved two podiums. Jackie Stewart tested an early BT45C (chassis number 8) in 1978 and returned an overall favourable impression of the car as well as the team, with the smooth, torquey Alfa Romeo flat-twelve and the Brabham gearbox coming in for particular praise. The chassis was not yet fully sorted and Stewart disliked the cable-operated clutch; but the Brabham was still the fastest car he ran in a series of tests at Paul Ricard.^[2]

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

^1 This total includes points scored using the Brabham BT46.