The Ralt RT4 is an open-wheel

formula racing Formula racing (known as open-wheel racing in North America) is any of several forms of open-wheeled single-seater motorsport. The origin of the term lies in the nomenclature that was adopted by the FIA for all of its post-World War II single ...

car, designed, developed and built by

Ralt Ralt was a manufacturer of single-seater racing cars, founded by ex-Jack Brabham associate Ron Tauranac after he sold out his interest in Brabham to Bernie Ecclestone. Ron and his brother had built some specials in Australia in the 1950s under ...

, for

Formula Atlantic Formula Atlantic is a specification of open-wheel racing car developed in the 1970s. It was used in professional racing through the IMSA Atlantic Championship until 2009 and is currently primarily used in amateur racing through Sports Car Club ...

(and was also occasionally raced in

Formula Two Formula Two (F2 or Formula 2) is a type of open-wheel formula racing category first codified in 1948. It was replaced in 1985 by Formula 3000, but revived by the FIA from 2009–2012 in the form of the FIA Formula Two Championship. The name r ...

categories), in 1980. It was later converted into a closed-wheel prototype, and used in the revived

Can-Am The Canadian-American Challenge Cup, or Can-Am, was an SCCA/ CASC sports car racing series from 1966 to 1987. History Can-Am started out as a race series for group 7 sports racers with two races in Canada (''Can'') and four races in the United ...

series, between 1982 and 1985, where it achieved only modest success. In Can-Am copetition the car achieved 1 podium finish, 1 class victory and a best result of a 2nd-place finish.

Background

The RT4 was the car of choice in

Australian Formula 1 Australian Formula 1 (AF1) was a motor sport category for open-wheeler racing cars which was current in Australia from 1970 to 1983. AF1 was introduced by the Confederation of Australian Motor Sport in 1970, initially restricting cars to unsuperch ...

and

Formula Mondial Formula Mondial was an international motor racing category which was introduced to replace both Formula Atlantic and the similar Formula Pacific''The Macquarie Dictionary of Motoring'', 1986, page 171 in 1983.''Australian Motor Racing Yearbook, 1982 ...

during the early to mid-1980s. Roberto Moreno drove an RT4 to win the

Australian Grand Prix The Australian Grand Prix is an annual motor racing event which is under contract to host Formula One until 2035. One of the oldest surviving motorsport competitions held in Australia, the Grand Prix has moved frequently with 23 different venu ...

1981 Events January * January 1 ** Greece enters the European Economic Community, predecessor of the European Union. ** Palau becomes a self-governing territory. * January 10 – Salvadoran Civil War: The FMLN launches its first major off ...

1983 The year 1983 saw both the official beginning of the Internet and the first mobile cellular telephone call. Events January * January 1 – The migration of the ARPANET to TCP/IP is officially completed (this is considered to be the beginning ...

, and the final AGP in

1984 Events January * January 1 – The Bornean Sultanate of Brunei gains full independence from the United Kingdom, having become a British protectorate in 1888. * January 7 – Brunei becomes the sixth member of the Association of Southeast As ...

before it became a round of the

Formula One Formula One (also known as Formula 1 or F1) is the highest class of international racing for open-wheel single-seater formula racing cars sanctioned by the Fédération Internationale de l'Automobile (FIA). The World Drivers' Championship ...

World Championship in 1985, while

Alain Prost Alain Marie Pascal Prost (; born 24 February 1955) is a French retired racing driver and Formula One Formula One (also known as Formula 1 or F1) is the highest class of international racing for open-wheel single-seater formula racing ...

also drove one to victory in the 1982 Australian Grand Prix. Other F1 drivers to drive a Ralt RT4 in Australia during this period included

Jacques Laffite Jacques-Henri Laffite (; born 21 November 1943) is a French former racing driver who competed in Formula One from to . He achieved six Grand Prix wins, all while driving for the Ligier team. From 1997 to 2013, Laffite was a presenter for TF1. ...

and

Andrea de Cesaris Andrea de Cesaris (31 May 19595 October 2014) was an Italian racing driver. He started 208 Formula One Grands Prix but never won. As a result, he holds the record for the most races started without a race victory. A string of accidents early i ...

, as well as World Champions Alan Jones,

Nelson Piquet Nelson Piquet Souto Maior (, born 17 August 1952) is a Brazilian retired racing driver and businessman. Since his retirement, Piquet, a three-time World Champion, has been ranked among the greatest Formula One (F1) drivers in various motors ...

, Keke Rosberg and

Niki Lauda Andreas Nikolaus "Niki" Lauda (22 February 1949 – 20 May 2019) was an Austrian Formula One driver and aviation entrepreneur. He was a three-time Formula One World Drivers' Champion, winning in , and , and is the only driver in Formula ...

. The RT4, generally powered by a naturally aspirated ,

four-cylinder The engine configuration describes the fundamental operating principles by which internal combustion engines are categorized. Piston engines are often categorized by their cylinder layout, valves and camshafts. Wankel engines are often categorize ...

Ford BDA engine Cosworth is a British automotive engineering company founded in London in 1958, specialising in high-performance internal combustion engines, powertrain, and electronics for auto racing, automobile racing (motorsport) and mainstream Automotiv ...

which produced around , also saw John Bowe win the Australian Drivers' Championship in

and

1985 The year 1985 was designated as the International Youth Year by the United Nations. Events January * January 1 ** The Internet's Domain Name System is created. ** Greenland withdraws from the European Economic Community as a result of a ...

, while Australian Ralt importer Graham Watson used one to win the 1986 championship. The

chassis A chassis (, ; plural ''chassis'' from French châssis ) is the load-bearing framework of an artificial object, which structurally supports the object in its construction and function. An example of a chassis is a vehicle frame, the underpa ...

was constructed out of an

aluminum Aluminium (aluminum in American and Canadian English) is a chemical element with the symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals, at approximately one third that of steel. It h ...

monocoque Monocoque ( ), also called structural skin, is a structural system in which loads are supported by an object's external skin, in a manner similar to an egg shell. The word ''monocoque'' is a French term for "single shell". First used for boats, ...

, covered in a

fiberglass Fiberglass (American English) or fibreglass (Commonwealth English) is a common type of fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened into a sheet called a chopped strand mat, or woven into glass cl ...

body. It was also very light, weighing only .

References

{{reflist Open wheel racing cars Formula Atlantic Formula Two cars