Question: What did BMW in Formula One and Brabham have in common?  

Context articles: Brabham BT3
Brabham BT60
David Brabham
Brabham
Brabham BT54
Brabham BT50
Brabham BT43
BMW M12
BMW in Formula One
Ron Tauranac

The Brabham BT3 is a Formula One racing car.
 It was the first Formula One design to be produced by Motor Racing Developments for the Brabham Racing Organisation, and debuted at the 1962 German Grand Prix.
 The Brabham BT3 was the vehicle with which team owner – then two-time World Champion – Jack Brabham, became the first driver ever to score World Championship points in a car bearing his own name, at the 1962 United States Grand Prix.
 The following year Brabham also became the first driver ever to win a Formula One race at the wheel of an eponymous car, again driving the BT3, at the 1963 Solitude Grand Prix.
 The BT3 design was modified only slightly to form the Tasman Series-specification Brabham BT4 cars.
The Brabham BT60 was the final series of Formula One racing cars built for the Brabham Formula One motor racing team.
 Designed by Sergio Rinland, they raced in the 1991 and 1992 Formula One World Championships.
 The car brought to a close Brabham's 30 years of construction of purpose-built racing cars, which began with Jack Brabham and Ron Tauranac and the Brabham BT1 Formula Junior design in 1961.
David Brabham (born 5 September 1965) is an Australian professional racing driver and one of the most successful and experienced specialists in sports car racing.
 He has won three international Sports Car series and is one of four Australians to have won the Le Mans 24 Hour sports car race, winning the event in 2009 .
 Brabham won the American Le Mans Series in 2009 and 2010.
 He also competed in Formula One, racing for the Brabham and Simtek teams in 1990 and 1994 respectively.
 Brabham is the youngest son of three-time Formula One world champion Sir Jack Brabham, brother to Geoff Brabham and Gary Brabham.
 Brother in law to Mike Thackwell, father to Sam Brabham and uncle to Matthew Brabham.
Motor Racing Developments Ltd., commonly known as Brabham , was a British racing car manufacturer and Formula One racing team.
 Founded in 1960 by two Australians, driver Jack Brabham and designer Ron Tauranac, the team won four Drivers' and two Constructors' World Championships in its 30-year Formula One history.
 Jack Brabham's 1966 Drivers' Championship remains the only such achievement using a car bearing the driver's own name.
The Brabham BT54 was a Formula One racing car designed by Gordon Murray for the Brabham team for the Formula One season.
 The car was powered by the BMW M12 4cyl turbo engine (generally agreed to be the most powerful engine in Formula One at the time) and used Pirelli tyres.
 Like most of its rivals, Brabham had used Michelin tyres in .
 However, when the French company pulled out of Grand Prix racing at the end of that season, team owner Bernie Ecclestone took a gamble and instead of signing with Goodyear for their proven rubber, signed with the Italian company instead.
The Brabham BT50 was a Formula One racing car designed by Gordon Murray and powered by a turbo BMW engine.
 It was raced by the Brabham team, owned by Bernie Ecclestone, during the 1982 Formula One season.
 Driven by Nelson Piquet and Riccardo Patrese, it made its debut at the South African Grand Prix before being withdrawn for further development of its engine while the team reverted to the previous year's car, the Brabham BT49.
 On the reintroduction of the BT50, Piquet finished fifth in the Belgian Grand Prix.
 A few races later he drove it to a win in the Canadian Grand Prix.
 Later in the year it achieved three more finishes in the points for the team.
 During the second half of the season, Brabham implemented the strategy of mid-race refueling.
 This allowed Piquet and Patrese to start the races relatively light and use their reduced weight to gain track position over their competitors before stopping to refuel.
 The poor reliability of the BT50 meant that they had only a few opportunities to demonstrate the strategy in practice.
The Brabham BT43 was the only Formula 5000 racing car built by Motor Racing Developments (MRD).
 Initiated by Ron Tauranac, designed by Geoff Ferris, and built by a team including Nick Goozee (monocoque) and Bob Paton (construction), it was one of the last cars produced by MRD before MRD was closed by the then new Brabham owner Bernie Ecclestone.
 Based on the Formula Two Brabham BT40 (which was also designed by Geoff Ferris) the BT43 featured a modified monocoque that incorporated the triangular cross section pioneered by the Brabham BT42 Formula One car which was designed by Gordon Murray.
 This distinctive pyramid shape not only kept the aerodynamic "stagnation point" low but also neatly allowed the incorporation of a "crushable structure" as required by the 1973 regulations which specified that all fuel tanks were to be protected by deformable structures.
 Engine and gearbox were the then de facto F5000 standard combination of a Chevrolet 302 cubic inch engine in an unstressed mounting and a Hewland DG300 gearbox.
 The fitment of these into what was a relatively small Formula Two sized car presented some design challenges.
 Front suspension components were BT40 while rear suspension components were a combination of Formula One and BT40.
The BMW M12/13 turbo 1500 cc 4-cylinder turbocharged Formula One engine, based on the standard BMW M10 engine introduced in 1961, powered the F1 cars of Brabham, Arrows and Benetton.
 Nelson Piquet won the FIA Formula One Drivers' Championship in 1983 driving a Brabham powered by the BMW M12/13 turbo.
 It was the first Drivers' Championship to be won using a turbocharged engine.
 The engine also powered the BMW GTP and in the 2.0 liter naturally aspirated form, the successful March Engineering Formula Two cars.
BMW has been involved in Formula One in a number of capacities since the inauguration of the World Drivers' Championship in .
 The company entered occasional races in the 1950s and 1960s (often under Formula Two regulations), before building the BMW M12/13 inline-four turbocharged engine in the 1980s.
 This engine was the result of a deal between BMW and Brabham, which resulted in the team's chassis being powered by BMW engines from until , a period in which Nelson Piquet won the championship driving a Brabham BT52-BMW.
 BMW also supplied the M12/13 on a customer basis to the ATS, Arrows, Benetton and Ligier teams during this period, with various degrees of success.
 In , Brabham temporarily withdrew from the sport and BMW withdrew its official backing from the engines, which were still used by the Arrows team under the Megatron badge.
 Turbocharged engines were banned by the revised Formula One Technical Regulations for , rendering the M12/13 obsolete.
Ronald Sidney "Ron" Tauranac AO (born 13 January 1925) is a retired Australian engineer and racing car designer, who with Formula One driver Jack Brabham founded the Brabham constructor and racing team in 1962.
 Following Brabham's retirement as a driver at the end of the 1970 season, Tauranac owned and managed the Brabham team until 1972, when he sold it to Bernie Ecclestone.
 He remained in England to assist with a redesign of a Politoys Formula One chassis for Frank Williams in 1973 and helped Trojan develop a Formula One version of their Formula 5000 car.