An open-wheel car is a car with the wheels outside the car's main body, and usually having only one seat. Open-wheel cars contrast with street cars, sports cars , stock cars , and touring cars , which have their wheels below the body or inside fenders . Open-wheel cars are built both for road racing and oval track racing . Open-wheel cars licensed for use on public roads ( street legal ), such as the Ariel Atom , are uncommon, as they are often impractical for everyday use.
49-521: The Ginetta-Juno P3-15 , also known as the Ginetta-Juno P3 is a Le Mans Prototype LMP3 built to ACO Le Mans Prototype LMP3 regulations. It was designed by Ewan Baldry, and built by Ginetta Cars . The car was the first car to launch, and run in the class, with it making its debut at the 2015 4 Hours of Silverstone. It subsequently formed the basis of the G57 P2 , and the later G58 . A direct successor to
98-434: A 4.2-litre naturally-aspirated V8. In seasons 2017 through 2020, the engine produced about 600 bhp . Dallara , Onroak Automotive (Ligier), Oreca and the joint-venture Riley Tech / Multimatic were selected by FIA as the four exclusive chassis constructors, which must be closed-cockpit designs. Before the start of the 2021 season LMP2 cars have been slowed down to ensure the necessary lap time difference between
147-549: A class above production-based grand tourer cars, which compete alongside them in sports car racing . Later, LMP1 designs included hybrid cars that use electric motors to assist acceleration. The Le Mans Prototype LMP1 class has been replaced by Le Mans Hypercars in the FIA World Endurance Championship (WEC) and in the 24 Hours of Le Mans from the 2021 season . Non-hybrid LMP1 cars were eligible to be "grandfathered" for two more seasons and compete alongside
196-542: A mechanic in the automotive industry, Harroun began competitive professional racing in 1906, winning the AAA National Championship in 1910. He was then hired by the Marmon Motor Car Company as chief engineer, charged with building a racecar intended to race at the first Indianapolis 500 , which he went on to win. He developed a revolutionary concept which would become the originator and forefather of
245-570: A protection system to the cockpit called the "halo" , a wishbone-shaped frame aimed to deflect debris away from a driver's head. Despite initial criticism, including for the reason of obstructing the driver's vision, it gained some praise in the Formula 2 sprint race in Catalunya when Nirei Fukuzumi spun and had the back of his car land on fellow countryman Tadasuke Makino 's halo. In the 2018 Formula 1 Belgian Grand Prix , McLaren driver Fernando Alonso
294-577: Is 1,500 kilograms (3,200 lb). Open-wheeled racing is among the fastest in the world. Formula One cars can reach speeds in excess of 360 kilometres per hour (220 mph). At Autodromo Nazionale Monza , Antônio Pizzonia of BMW Williams F1 team recorded a top speed of 369.9 kilometres per hour (229.8 mph) (over 102 m/s) in the 2004 Italian Grand Prix . Since the end of the V10 era in 2006, such high speeds have not been reached, with later vehicles reaching around 360 kilometres per hour (220 mph). It
343-723: Is commonly referred to as a Le Mans car in the media. The first use of what would become Le Mans Prototypes was at the 1992 24 Hours of Le Mans . In an attempt to increase the number of entrants beyond the small field of Group C competitors that the World Sportscar Championship had to offer, older Porsche 962s were allowed entry in Category 3. To further increase the size of the field, small open-cockpit race cars using production road car engines which were raced in small national championships were allowed in Category 4. Later, ACO announced its intentions to completely replace
392-748: Is difficult to give precise figures for the absolute top speeds of Formula One cars as the data are not generally released by teams. The 'speed traps' on fast circuits such as Monza give a good indication, but are not necessarily located at the point on the track where the car is travelling at its fastest. BAR Honda team recorded an average top speed of 400 kilometres per hour (250 mph) in 2006 at Bonneville Salt Flats , with unofficial top speed reaching 413 kilometres per hour (257 mph) using their modified BAR 007 Formula One car. Speeds on ovals can range in constant excess of 210–220 miles per hour (340–350 km/h), and at Indianapolis in excess of 230 miles per hour (370 km/h). In 2000, Gil de Ferran set
441-470: Is expected in covered-wheel racing, as for example in NASCAR. Open-wheeled drivers must be extremely precise to avoid contact. Regulations tend to permit much lower open-wheel car weights than in categories that more closely resemble street-legal vehicles, such as sports , touring , and stock cars . For instance, a Formula One car must weigh at least 798 kilograms (1,759 lb); the minimum weight for NASCAR
490-624: Is not always the case; some open-wheel categories raced primarily as development or amateur categories, such as Formula Ford or Formula Vee , do not permit the use of wings or ground effect aerodynamics. Some major races, such as the Singapore Grand Prix , Monaco Grand Prix (sanctioned by Formula One) and the Long Beach Grand Prix (sanctioned by IndyCar), are held on temporary street circuits . However, most open-wheel races are on dedicated road courses , such as Watkins Glen in
539-604: Is noted to be similarly quick to the Ligier. Results in bold indicate pole position. Results in italics indicate fastest lap. Results in bold indicate pole position. Results in italics indicate fastest lap. Le Mans Prototype A Le Mans Prototype ( LMP ) is a type of sports prototype race car used in various races and championships, including the 24 Hours of Le Mans , FIA World Endurance Championship , IMSA SportsCar Championship , European Le Mans Series , and Asian Le Mans Series . Le Mans Prototypes were created by
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#1732856194177588-576: The Automobile Club de l'Ouest (ACO). The technical requirements for an LMP include bodywork covering all mechanical elements of the car. As of 2023, there are two classes within Le Mans Prototypes, designated LMP2 and LMP3 . While not as fast as open-wheel Formula One cars around a track, the LMP1s were the fastest closed-wheel racing cars used in circuit racing. Le Mans Prototypes are considered
637-643: The Donington Park Circuit . In October 2014, the first car was announced to be sold to the University of Bolton , under its Centre for Advanced Performance Engineering (CAPE). For the 2015 season, 6 cars would be run in the European Le Mans series , with 2 run by the factory Ginetta team, Team LNT . The factory cars secured the 1st and 2nd in the LMP3 Championship. The Ginettas also won all races in
686-709: The Monza Circuit the fastest lap in the 2021 Grand Prix ( Daniel Ricciardo 1:24.812) is more than six seconds per lap faster than the fastest closed-wheel racing car, an LMP1 sports car , and more than 20 seconds per lap faster than the DTM touring car lap record. Driving an open-wheel car is substantially different from driving a car with fenders. Virtually all Formula One and IndyCar drivers spend some time in various open-wheel categories before joining either top series. Open-wheel vehicles, due to their light weight, aerodynamic capabilities, and powerful engines, are often considered
735-717: The 2015–2019 first-generation ruleset were the Ginetta-Juno P3 , Ligier JS P3 , Norma M30 , ADESS-03 , and the Ave-Riley AR-02. The cars were eligible in a number of series, such as the Asian Le Mans Series, the European Le Mans Series, as well as the V de V Endurance Series and the IMSA Prototype Challenge . A number of championships for the class have also been created, such as the FRD LMP3 series and
784-741: The ACO. After the 2015 season, it was announced that Ginetta would be moving on from the project, and focusing on the G57 P2 Track day car. This was due to a dispute between powertrain components supplier ORECA , and Ginetta. The tub of the car is shared with its successors, the Ginetta G57 P2 , the Ginetta G58 , and the Ginetta G61-LT-P3 , and can be upgraded with new bodywork and engine configurations to be built up into its successors. The car also formed
833-731: The British LMP3 Cup. First-generation cars were powered by a 5.0-litre normally-aspirated Nissan VK50 V8 engine , producing 310 kW (420 hp). A 2nd Generation ruleset was introduced for 2020, with new cars introduced: the Ginetta G61-LT-P3 , Ligier JS P320 , Duqueine D-08 , and the ADESS-03 Evo. These cars can be built from its predecessors using an upgrade kit. The new LMP3 prototypes are used in Asian Le Mans Series, Michelin Le Mans Cup , IMSA VP Racing SportsCar Challenge , European Le Mans Series, and Prototype Cup Germany. For
882-577: The GT class regulations, forcing the ACO to promote them as prototypes. In 2000, changes were made to the LMP regulations, as the ACO once again split the open-cockpit LMP class. The two new classes became known as "LMP900" and "LMP675", with the numbers denoting the minimum weight requirements (in kilograms) for each class. The LMP900s were to be more powerful and faster in top speed, but also heavier and more cumbersome. The LMP675s were to be smaller and more nimble, yet lack
931-515: The Group C cars with Le Mans Prototypes . Two classes were created, with LMP1s running large displacement custom-built engines that were usually turbocharged, and LMP2s using the smaller displacement production-based engines. Both classes were required to have open cockpits. However, LMP1 cars that year were just former Group C cars, some still with closed cockpits ( Toyota 94C-V , Courage C32 , Kremer K8 Spyder , Porsche 962C GTI , ALD C289 and Alpa LM). At
980-724: The Hypercar category, a single aero kit has been made mandatory across the whole season and is limited to the Le Mans specification in the WEC; the ELMS teams have retained the right to switch between the aero kits. LMP3 is an entry-level prototype class intended for introducing young drivers and new teams to endurance racing before they progress to the higher classes of prototype racing, LMP2 and ultimately Hypercar. LMP3 uses closed-cockpit chassis, which can be built by any licensed constructor. Cars eligible for
1029-487: The Indy 500. Compared to covered-wheel race cars, open-wheeled cars allow more precise placement of the front wheels on the race course, as the tires are clearly visible to the driver. This allows the maximum potential of the cars to be achieved during cornering and passing. Furthermore, open-wheeled cars are less tolerant of vehicle-to-vehicle contact, which usually results in vehicle damage and retiring, whereas some level of contact
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#17328561941771078-583: The LMP2 and a new class—Hypercar. In the original version of the new ruleset, revealed in November 2020, only the power of the Gibson engine has been reduced—to 560 bhp. Right before the start of the season, the cars were further weakened, by trimming an additional 20 bhp to a total of 540 bhp. The minimum weight of the cars has also been increased by 20 kg and has been set at 950 kg. Furthermore, mirroring
1127-508: The P3-15, the G61-LT-P3 , was developed to meet the new 2020 LMP3 regulations, while retaining the original tub utilised in the P3-15. In 2013, the ACO announced a new category of Le Mans Prototypes, known as LMP3, which would replace the previous Le Mans Prototype Challenge (LMPC) class in 2015. Shortly afterwards, Juno Racing Cars announced that it would be building a car for the class, before it
1176-740: The US, Nürburgring in Germany, Spa-Francorchamps in Belgium and Silverstone in Great Britain. In the United States, some top-level open-wheel events are held on ovals, of both short track and superspeedway variety, with emphasis more on speed and endurance than the maneuverability required for road and street course events. The Whelen Modified Tour is the only opened wheeled race car series endorsed by NASCAR . This series races on most of NASCAR's most famous tracks in
1225-560: The United States. Other asphalt modified series race on short tracks in the United States and Canada, such as Wyoming County International Speedway in New York. The best-attended oval race in the world is the annual Indianapolis 500 (Indy 500) in Speedway, Indiana , sanctioned by IndyCar; in the United States it is quite common to refer to open-wheel cars as IndyCars, because of their recognizable appearance and widespread popularity across America at
1274-687: The Whelen Modified Tour, where the engine is in front of the driver. Depending on the rules of the class, many types of open-wheelers have wings at the front and rear of the vehicle, as well as a very low and virtually flat undertray that helps achieve additional aerodynamic downforce pushing the car onto the road. While many other categories of racing cars produce downforce, the top categories of open-wheel racing cars (particularly Formula One and IndyCar ) produce far more downforce relative to their mass than any other racing category, allowing much higher corner speeds on comparable tracks. However, this
1323-562: The base of the Roborace Devbot, used for the development of the Artificial Intelligence software for the future electrically powered autonomous racing series. The Devbot incorporates the same internal units that are used in the actual RoboCar, and is stripped off all bodywork, to provide better cooling and access. The Devbot would have its initial public test during Pre-Season testing for the 2016–17 FIA Formula E Championship , at
1372-538: The costs, FIA introduced a new set of LMP2 regulations, which will be locked in through 2020, aiming for a significant power increase, to the range of 150 horsepower (which is expected to lead to a four-second decrease in lap time at Le Mans). Gibson Technology is the exclusive engine supplier for LMP2, producing a four-litre normally-aspirated V8. Biofuels , specifically petrol with 10% ethanol and biodiesel ( BTL ), are allowed in both LMP1 and LMP2 categories. The fuel tank size and minimum weight for non-hybrid cars
1421-492: The fastest racing vehicles available and among the most challenging to master. Wheel-to-wheel contact is dangerous, particularly when the forward edge of one tire contacts the rear of another tire: since the treads are moving in opposite directions (one upward, one downward) at the point of contact, both wheels rapidly decelerate, torquing the chassis of both cars and often causing one or both vehicles to be suddenly and powerfully flung upwards (the rear car tends to pitch forward, and
1470-598: The front car tends to pitch backward.) An example of this is the 2005 Chicagoland crash of Ryan Briscoe and Alex Barron . The lower weight of an open-wheel racecar enables better performance. While the exposure of the wheels to the airstream causes a very high aerodynamic drag at high speeds, it allows improved cooling of the brakes, which is important on road courses with their frequent changes of pace. In 2018, several single seater series such as Formula One, Formula 2 (with their new Dallara F2 2018 chassis), and Formula E (with their new Spark SRT05e chassis) introduced
1519-499: The main body of the car, and thus the open-wheel design became almost exclusively associated with racing vehicles. Formula One cars have almost exclusively used the open-wheel design throughout the history of the championship. The only notable exception was the "Monza body" variation of the Mercedes-Benz W196 racer of 1954–55, which covered the wheels with bodywork for aerodynamic reasons. Modern Formula One regulations mandate
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1568-658: The new class for the 2021 to 2022 seasons. Starting from the 2023 season of WEC and IMSA SportsCar Championship, Le Mans Hypercars are joined by Le Mans Daytona h (LMDh) cars. These two kinds of prototypes will form the top class of endurance racing: Hypercar in WEC and Grand Touring Prototype (GTP) in IMSA. Le Mans Prototypes have used various names depending on the series in which they compete. The FIA 's equivalent cars were referred to as Sports Racers (SR) or Sports Racing Prototypes (SRP). The American IMSA GT Championship termed their cars World Sports Cars (WSC), while
1617-523: The one-lap qualifying record of 241.428 miles per hour (388.541 km/h) at California Speedway . Even on tight non-oval street circuits such as the Grand Prix of Toronto , open-wheel Indy Cars attain speeds of 190 miles per hour (310 km/h). Regardless of top speeds, Formula One open-wheel race cars hold the outright lap record at the circuits where they race due to their combination of top speed, acceleration, and cornering abilities. For example, at
1666-473: The open-wheel configuration. A typical open-wheeler has a minimal cockpit, sufficient only to enclose the driver's body, with the head exposed to the air. In the Whelen Modified Tour and other short track modified series, the driver's head is contained in the car. In modern cars, the engine is often located directly behind the driver and drives the rear wheels; except in asphalt modified cars, such as
1715-456: The same class structure as the 24 Hours of Le Mans, meaning it was the first championship to use the LMP name. At the same time, the ACO greatly altered their LMP classes. The smaller LMP2 class were briefly eliminated, while a new class of closed-cockpit prototypes was allowed in, known as "LMGTP" (Le Mans grand touring prototype). These cars were evolutions of production-based road cars that the ACO considered too advanced and too fast to fall under
1764-485: The same time, the IMSA GT Championship announced the end of their closed cockpit GTP and Lights classes, deciding as well to replace them with a single open-cockpit class of World Sports Cars equivalent to LMP1. This formula continued up to 1996, with many manufacturers embracing the LMP and WSC classes, including Ferrari , Porsche , and Mazda . In 1997, the first European series based around Le Mans Prototypes
1813-553: The season, while the sole non-Ginetta car, a Ligier JS P3 run by Graff Racing managed a podium on its debut, at the end of the season. Following the end of the season, after Ginetta's announcement, that it would shift its focus towards the G57 P2, the car was dropped by most teams, which switched to the Ligier JS P3. The car has remained more popular in Asia since the 2015 season, although it
1862-475: The second generation, engines were upgraded to the 5.6-litre Nissan VK56 , increasing horsepower to 340 kW (455 hp). For 2025, the engines used in the class are set to be replaced with the twin-turbocharged 3.4-litre Toyota V35A , bringing about a power increase to 350 kW (470 hp). LMPC ( Le Mans Prototype Challenge ) was an earlier entry level class, introduced in 2009, consisting of competitors running identical Oreca FLM09 cars. The class
1911-507: The short-lived United States Road Racing Championship (USRRC) used the classic Can-Am (CA) name for their prototypes. Since 2004, most series have switched to referring to these cars as Le Mans Prototypes . The American Le Mans Series , the successor to the IMSA GT Championship and the predecessor of the TUDOR United SportsCar Championship, officially referred to the cars simply as Prototypes (P1, P2, or PC). An LMP
1960-403: The single-seater (i.e. monoposto) racecar design. Harroun has also been credited by some as pioneering the rear-view mirror which appeared on his 1911 Indianapolis 500 winning car, though he himself claimed he got the idea from seeing a mirror used for a similar purpose on a horse-drawn vehicle in 1904. Prior to World War II , street automobiles generally had wheels that protruded beyond
2009-638: The sportscar championship of the 1970s. However, the USRRC collapsed before the end of 1999, with the series becoming the Rolex Sports Car Series chose to use the FIA's SR1 and SR2 formula instead. 1998 saw a great expansion for the ACO's LMP classes. Following the cancellation of the IMSA GT Championship at the end of 1998, the ACO allowed for the creation of the American Le Mans Series. This series used
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2058-527: The top speed of the larger class. Both classes were intended to be able to compete for overall wins. Audi , Chrysler , Cadillac , and Panoz opted to use the LMP900 formula, while MG were the only major manufacturer to attempt the LMP675 class. The LMGTP class also continued, with Bentley being the only manufacturer to build a closed-cockpit prototype after the regulation changes in 2000. In 2017, in order to limit
2107-410: The vehicle's main body, though they were typically covered with mudguards to protect the car body and following traffic from water and mud spray. With the advent of unibody vehicle construction, the desire to maximise interior space, to improve aerodynamics, and aircraft-inspired styling trends of the era, by the end of the 1950s the majority of new road-registerable vehicles had wheels that were under
2156-446: Was subject to adjustment to reduce the difference in performance between hybrid and non-hybrid cars. There were no limits on the number of cylinders for any type of engine. Bodywork was required to cover all mechanical elements of the car, so that they couldn't be visible when the car is viewed directly from the front, side, or top. The LMP1 cars were generally the most powerful, with higher straight-line speeds. The LMP1 category
2205-497: Was dropped in European Le Mans Series in 2014 . As the cost of running an LMPC team was found to be comparable to that for an LMP2 team, the class was dropped after the 2017 season in the WeatherTech SportsCar Championship. Open-wheel American racecar driver and constructor Ray Harroun was an early pioneer of the concept of a lightweight single-seater, open-wheel "monoposto" racecar. After working as
2254-451: Was launched, known as the " International Sports Racing Series ". Using classes similar to LMP1/WSC and LMP2, these cars were known as "SR1" and "SR2" by the FIA. 1998 saw the creation of another series of Le Mans Prototypes, with the new United States Road Racing Championship attempting to break away from the IMSA GT Championship. To differ from IMSA'S WSC class, the USRRC named their open-cockpit prototypes " Can-Am " in an attempt to resurrect
2303-411: Was purchased by Ginetta. The engine is a Nissan VK50VE producing 420 hp, paired to an Xtrac 6-Speed Manual Sequential Gearbox. The car had its first shakedown run at Leeds East Airport , with Ginetta chairman Lawrence Tomlinson at the wheel. The car was initially overweight, due to a misprediction of the mass of the powertrain, until the minimum weight of the class was raised to 930 kg by
2352-429: Was retired at the end of the 2020 season, replaced by a new top class of the endurance racing: Hypercar . From 2017, in order to limit the costs, FIA introduced a new set of regulations, which will be locked in through 2025. The rules allow a significant power increase (150 horsepower) which is expected to lead to a four-second decrease in lap time at Le Mans. Gibson Technology is the exclusive engine supplier, producing
2401-636: Was sent airborne after being hit from behind by the Renault of Nico Hülkenberg and struck the halo of Sauber driver Charles Leclerc , thereby saving the Monegasque driver from a visor strike. In 2019 , the newly-formed FIA Formula 3 Championship introduced a halo to their new chassis which was unveiled at the 2018 Abu Dhabi Grand Prix . In 2020 , the IndyCar Series adopted a halo combined with an aeroscreen, built by Red Bull Advanced Technologies. At
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