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93-515: The Alfa Romeo P3 , P3 monoposto or Tipo B was a classic Grand Prix car designed by Vittorio Jano , one of the Alfa Romeo 8C models. The P3 is considered to be the world's first genuine single-seat Grand Prix racing car and was Alfa Romeo's second monoposto after the Tipo A monoposto (1931). It was based on the earlier successful Alfa Romeo P2 . Taking lessons learned from that car, Jano went back to

186-585: A Lola - Ford . The Offenhauser engine was also paired with a European maker, McLaren , obtaining three wins for the chassis, one with the Penske team in 1972 with driver Mark Donohue , and two for the McLaren works team in 1974 and 1976 with Johnny Rutherford . This was also the last time the Offy would win a race, its competitiveness steadily decreasing until its final appearance in 1983. American drivers continued to fill

279-407: A blind draw for the qualifying order. For each attempt, cars are allowed two warm-up laps. At that time, a member of the team is stationed at the north end of the main stretch. He or she must wave a green flag, signaling an attempt, or else the car will be waved off. The attempt can be waved off during any of the four laps by the team, driver, or race officials. (The series will wave off the run if it

372-415: A century, the race eschewed any sort of naming rights or title sponsor , a move, though uncommon in the modern sports world, that was well received by fans. This tradition finally ended in 2016 when a presenting sponsor, PennGrade, was added for the first time. In the 21st century, the facility has also slowly added sponsorship ads on the retaining walls and infield grass. The ESPN-produced ABC telecast of

465-420: A change to a 450-cubic-inch (7,400 cc) maximum engine size. After World War I , the native drivers and manufacturers regained their dominance of the race, and engineer Harry Miller set himself up as the most competitive of the post-war builders. His technical developments allowed him to be indirectly connected to a history of success that would last into the mid-1970s. For musical entertainment before

558-415: A given car number—the "primary" car and a "backup" car. The backup car is identified by the letter "T". For example, the two cars for the #2 team would be numbered #2 and #2T. Both cars may be practiced during the month, but due to engine lease rules, they must share the same engine. It is not uncommon for teams to prefer their backup car, if it is deemed faster, or for other strategic reasons. Additionally, as

651-542: 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

744-501: A one-thousand-mile (1,600 km) event. They decided on 500 miles (800 km), the estimated distance a race car could run before dark descended on the track, and a spectacular purse of $ 25,000, equivalent to 82.93 pounds (37.62 kg) of pure gold . The combination allowed the track to rapidly acquire a privileged status for automobile races. The first "500" was held at the Speedway in 1911 on Decoration Day , May 30, (as it

837-399: A part-time team altogether that does not enter any of the other races, or enters only a few selected races. The "Indy-only" drivers may come from a wide range of pedigrees but are usually experienced Indy car competitors who either lack a full-time ride, are former full-time drivers who have elected to drop down to part-time status, or occasional one-off drivers from other racing disciplines. It

930-570: 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

1023-467: A riding mechanic was made mandatory. This second event was won by Joe Dawson in a National , after Ralph DePalma 's Mercedes broke. Although the first race was won by an American driver at the wheel of an American car, European makers such as the Italian Fiat or French Peugeot companies soon developed their vehicles to try to win the event, which they did from 1912 to 1919. The 1913 event saw

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1116-538: Is Roger Penske , owner of the Indianapolis Motor Speedway and Team Penske , which has 20 total wins and 18 poles. Penske also has five wins at the IndyCar Grand Prix , held on the combined road course . The event is steeped in tradition , in pre-race ceremonies, post-race celebrations, and race procedure. The most noteworthy and most popular traditions are the 33-car field lining up three-wide for

1209-577: 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

1302-405: Is a rounded rectangle, with four distinct turns of identical dimensions, connected by four straightaways (two long straightaways and two "short chutes"). Traditionally , the field consists of 33 starters, aligned in a starting grid of eleven rows of three cars apiece. Drivers race 200 laps, counter-clockwise around the circuit, for a distance of 500 miles (800 km). Since its inception in 1911 ,

1395-589: Is an annual automobile race held at the Indianapolis Motor Speedway in Speedway, Indiana , United States, an enclave suburb of Indianapolis . The event is traditionally held over Memorial Day weekend, usually the last weekend of May. It is contested as part of the IndyCar Series , the top level of American open-wheel car racing , a formula colloquially known as "Indy car racing". The track itself

1488-415: Is contested by "Indy cars" , a formula of professional -level, single-seat, open cockpit , open-wheel , purpose-built race cars. As of 2020 , all entrants utilize 2.2 L V6 , twin- turbocharged engines, tuned to produce a range of 550–750 horsepower (410–560 kW). Chevrolet and Honda are the current engine manufacturers involved in the sport. Dallara is at present the sole chassis supplier to

1581-748: 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

1674-470: 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

1767-431: Is focused on safety aspects and is done on the pit lane qualifying queue. It is relatively brief, due to the time constraints of the qualifying procedure. The post-qualifying inspection is much more stringent and lengthy, taking place in the garage area. It is to detect deviations from the performance guidelines set forth by the league, and cars can and have been fined or outright disqualified if they fail inspection. During

1860-561: Is nicknamed the "Brickyard", as the racing surface was first paved in brick in the fall of 1909. One yard of brick remains exposed at the start/finish line. The event, billed as The Greatest Spectacle in Racing , is considered part of the Triple Crown of Motorsport along with the 24 Hours of Le Mans and the Monaco Grand Prix , with which it typically shares a date. The inaugural race

1953-624: 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

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2046-469: Is not uncommon for some drivers (particularly former Indy 500 winners) to quit full-time driving during the season, but race solely at Indy for numerous years afterward before entering full retirement. Technical specifications for the Indianapolis 500 are currently written by IndyCar . Rules are generally the same as every other IndyCar race. In the past, particularly during the era in which USAC sanctioned

2139-403: Is obvious the run will not be fast enough to qualify and it is getting late in the day.) If an attempt is waved off after the run starts, the attempt counts and the previous time is still forfeited unless race officials waved off the attempt because of weather. Weather can and often does affect qualifying and can result in last-minute format changes. From 1911 to 1955, the race was organized under

2232-709: 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

2325-597: The NASCAR weekend permanently in 2021 ), and the support races on the road course moved to its own September weekend. As races were cancelled because of local restrictions, the Speedway added two more road course races in October as part of the Intercontinental GT Challenge meeting, where attendance was capped to 10,000 per event. In 2024, the race was delayed for over four hours due to heavy rain and thunderstorms in

2418-544: The Peugeot Grand Prix engine which had been serviced in his shop by Fred Offenhauser in 1914, installing it in Jimmy Murphy 's Duesenberg and allowing him to win the 1922 edition of the race. Miller then created his own automobiles, which shared the 'Miller' designation, which, in turn, were powered by supercharged versions of his 2.0- and 1.5-liter (122 and 91 in ) engine single-seaters, winning four more races for

2511-470: The World Drivers' Championship . Josef Newgarden , the winner in 2023 – 2024 , is the reigning champion. The most successful drivers are A. J. Foyt , Al Unser Sr. , Rick Mears and Hélio Castroneves , each of whom has won the race four times. The active driver with the most victories is Castroneves. Rick Mears holds the record for most career pole positions with six. The most successful car owner

2604-428: The green–white–checker finish in case of a late-race yellow. The race can be (and has at times) finished under caution. However, officials may call for a late-race red flag (in lieu of a lengthy yellow) to provide an opportunity for a green-flag finish, an option that was used in 2014 , 2019 , 2022 , and 2023 . The circuit lacks lights, therefore lateness can become a factor in the cases of lengthy delays. The event

2697-416: The "International Sweepstakes" dropped. Since 1981, the race has been formally advertised in this fashion, complete with a unique annual logo with the ordinal almost always included. Around that same time, in the wake of the 1979 entry controversy, and the formation of CART , the race changed to an invitational event, rather than an Open , rendering the " sweepstakes " description inappropriate. For nearly

2790-530: The 100th race. Harold Hefner (Allison), Tom Harrison (Fisher), Jeff Angel (Wheeler), and Matthew Allen (Newby). In 2020, the race was delayed for the first time from its usual Memorial Day running to August due to the COVID-19 pandemic . There was no audience in attendance, so as to comply with pandemic guidelines. The road course race was moved to the NASCAR weekend in July (which led to an IndyCar road course race added to

2883-523: The 1970s. Soon after the death of Tony Hulman in 1977, and the loss of several key USAC officials in a 1978 plane crash, several key team owners banded together and formed CART in late 1978 to sanction the sport of Indy car racing . The Indianapolis 500 itself, however, remained under the sanctioning control of USAC. It became the lone top-level race the body still sanctioned, as it ultimately dropped all other Indy car races (as well as their stock car division ) to concentrate on sprints and midgets . For

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2976-407: The 1980s, as was Dutchman Arie Luyendyk . In 1993, reigning Formula One World Champion Nigel Mansell shocked the racing world by leaving Formula One for CART . While he came in only third in the 500 , he won the 1993 CART championship . Foreign-born drivers became a regular fixture of Indianapolis in the years to follow. Despite the increase in foreign drivers commonly being associated with

3069-458: The CART era, three of the first six Indianapolis 500 winners were non-American drivers. In 2009, the Indianapolis Motor Speedway began a three-year-long "Centennial Era" to celebrate the 100th anniversary of the opening of the track (1909), and the 100th anniversary of the first Indy 500 (1911). As a gesture to the nostalgic Centennial Era celebration (2009–2011), tickets for the 2009 race donned

3162-579: The Formula One drivers who did drive at the speedway was five-time world champion Argentinian Juan Manuel Fangio , though he failed to qualify for the 1958 race. It was not until the Indianapolis 500 was removed from the World Championship calendar that European entries made their return. In 1963, technical innovator Colin Chapman brought his Team Lotus to Indianapolis for the first time, attracted by

3255-481: The Indianapolis 500 for nearly two decades, made a brief return just before World War II , with the competitive Maserati 8CTF allowing Wilbur Shaw to become the first driver to win consecutively at Indianapolis, in 1939 and 1940. With the 500 having been a part of the World Drivers' Championship between 1950 and 1960, Ferrari made a discreet appearance at the 1952 event with Alberto Ascari , but European entries were few and far between during those days. Among

3348-593: The Indy 500 (but CART sanctioned the other Indy car races), rules at Indy slightly differed at times. The result, for example, would be a particular chassis or engine configuration being legal at Indy, but not so at the CART-sanctioned events. This was rather commonplace in the 1980s and early 1990s, when "stock-block" engines (namely the V-6 Buick) were allotted an increased level of turbocharger boost by USAC at Indy, compared to

3441-440: 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

3534-740: 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

3627-458: The United States' participation in the two World Wars (1917–1918, 1942–1945), the advertised Centennial Era occurred during the 93rd to 95th runnings. To avoid confusion between the 100th anniversary, and the actual number of times the race has been run, references to the ordinal during the Centennial Era were curtailed. In the 2014 meeting, the road course became part of the race meeting for

3720-510: 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

3813-687: 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

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3906-401: The area. The race was originally advertised as the "International 500-Mile Sweepstakes Race" from 1911 to 1916. However, from its inception, the race has been widely known as the Indianapolis 500 or, more simply "the 500", as for many years, it was the only noteworthy auto race of such distance. In 1919, the race was referred to as the "Liberty Sweepstakes" following WWI . From 1920 to 1980,

3999-666: The auspices of the AAA Contest Board . Following the 1955 Le Mans disaster , AAA dissolved the Contest Board to concentrate on its membership program aimed at the general motoring public. Speedway owner Tony Hulman founded USAC in 1956, which took over sanctioning of the race and the sport of Championship racing . From 1950 to 1960, the Indianapolis 500 also counted toward the FIA 's World Championship of Drivers (now synonymous with Formula One ), although few drivers participated in

4092-485: 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. 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

4185-491: The crews. More lengthy repairs are allowed, and since 1998 teams are permitted to return to the garage area to make repairs. However, there are limitations to the extent of repair work allowed and the practicality of such work. Teams are not allowed to change engines, and since 1933 a rule has been in place where teams are not allowed to add oil . In addition, the officials designate a certain lap after which off-track cars being serviced/repaired are no longer permitted to return to

4278-409: The distance has been completed, the race must be resumed and achieve at least the 101-lap distance in order to be official. A primary limiting factor is available daylight, as the track does not have lighting. If the race is halted and cannot be resumed before sunset, the resumption will be scheduled for the next possible day. The Indianapolis 500, as well as other IndyCar Series races, does not utilize

4371-560: The drawing board to design a car that could last longer race distances. The P3 was the first genuine single seater racing car, and was powered by a supercharged eight-cylinder engine. The car was very light for the period, weighing just over 1,500 lb (680 kg) despite using a cast iron engine block. Introduced halfway through the European 1932 Grand Prix season in June, the P3 won its first race at

4464-521: The engine up to 1929 (two of them, 1926 and 1928, in Miller chassis). The engines powered another seven winners until 1938 (two of them, 1930 and 1932, in Miller chassis), then ran at first with stock-type motors before later being adjusted to the international 3.0-liter formula. After purchasing the Speedway in 1927, Eddie Rickenbacker prohibited supercharging and increased the displacement limit to 366 cu in (6,000 cc), while also re-introducing

4557-705: The engine was bored out to 2.9 litres. Louis Chiron won the French Grand Prix at Montlhery, whilst the German Silver Arrows dominated the other four rounds of the European Championship. However, the P3s won 18 of all the 35 Grands Prix held throughout Europe. By the 1935 Grand Prix season the P3 was hopelessly uncompetitive against the superior German cars in 6 rounds of the European Championship, but that didn't stop one final, legendary works victory. The P3

4650-409: The event did not recognize this sponsorship and instead had Firestone Tires as its presenting sponsorship. The Borg-Warner Trophy , introduced in 1936, proclaims the event as the "Indianapolis 500-Mile Race", with no reference at all to the name "International Sweepstakes". The Indianapolis 500 is held annually at the Indianapolis Motor Speedway , a 2.5-mile (4 km) oval circuit . The track

4743-492: 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

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4836-512: The first time. The GMR Grand Prix road course event, and the three upper tiers of Road to Indy , participated in road course events at the Speedway during the first week of activities. Six years later, in 2016 , the race celebrated its 100th running with about 350,000 in attendance. Four local actors were hired to portray the Founding Four of James Allison, Carl Fisher, Frank Wheeler, and Arthur Newby during multiple Centennial Era events and

4929-431: The first two long-distance events (a 250 mi (400 km) and 300 mi (480 km), which was shortened to 235 mi (378 km) after two severe wrecks). That these spectacles had attracted 15,000 paying customers (and crowds of up to 40,000) persuaded principal owner Carl G. Fisher to spend $ 155,000 on repaving the track with 3.2 million bricks; he also added a 33-inch (0.84 m) concrete wall around

5022-598: 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

5115-500: The hands of Tazio Nuvolari and went on to win 6 races in total in that year, driven by both Nuvolari and Rudolf Caracciola . These victories included all three major Grands Prix in Italy, France and Germany. The 1933 Grand Prix season brought financial difficulties to Alfa Corse, so the cars were simply locked away and Alfa intended to rest on their laurels. Enzo Ferrari had to run his breakaway 'works' Alfa team as Scuderia Ferrari, using

5208-474: The large monetary prizes, far bigger than the usual at a European event. Racing a mid-engined car, Scotsman Jim Clark was second in his first attempt in 1963, dominated in 1964 until suffering suspension failure on lap 47, and completely dominated the race in 1965, a victory which also interrupted the success of the Offy, and giving the 4.2-liter Ford V8 its first success at the race. The following year, 1966, saw another British win, this time Graham Hill in

5301-499: 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

5394-645: The majority of entries at the Brickyard in the following years, but European technology had taken over. Starting in 1978, most chassis and engines were European, with the only American-based chassis to win during the CART era being the Wildcat and Galmer (which was technically built in Bicester , England) in 1982 and 1992, respectively. Ford and Chevrolet engines were built in the UK by Cosworth and Ilmor , respectively. As of 2023,

5487-414: The moniker "93rd 500 Mile International Sweepstakes". It is the first time since 1980 that the "Sweepstakes" title has been used. In May 2009, the ordinal (93rd) was used very sparingly, and for the first time since 1981, was not identified on the annual logo. Instead, in most instances in print, television, and radio, the race was referred to as the "2009 Indianapolis 500". Since the race was not held during

5580-465: The month wears on, a "T car" may be split off into a separate entry, and reassigned a new number, or be sold to another team. All cars must pass a rigorous technical inspection before receiving a sticker signifying that the car is eligible to practice. Various criteria include minimum weight, dimensions, and approved parts, particularly safety equipment. Before and after qualification attempts, cars must pass another inspection. The pre-qualifying inspection

5673-518: The most recent active Formula One driver to have entered the 500 is Fernando Alonso , who drove in the 2017 race. Alonso was the first Formula One driver to enter the 500 since Teo Fabi in 1984 . After foreign cars became the norm, foreign drivers began competing in the Indianapolis 500 regularly, choosing the United States as their primary base for their motor racing activities. Brazilian Emerson Fittipaldi , Italian Teo Fabi , and Colombian Roberto Guerrero were able to obtain good outings in

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5766-420: The official result. Eighty thousand spectators were in attendance, and an annual tradition had been established. Many considered Harroun to be a hazard during the race, as he was the only driver in the race driving without a riding mechanic , who checked the oil pressure and let the driver know when traffic was coming. In 1912, the purse was raised to $ 50,000, the field was limited to 33 (where it remains), and

5859-414: The older, less effective Alfa Monzas. Alfa procrastinated until August and missed the first 25 events, and only after much wrangling was the P3 finally handed over to Scuderia Ferrari . P3s then won six of the final 11 events of the season including the final 2 major Grands Prix in Italy and Spain. The regulations for the 1934 Grand Prix season brought larger bodywork requirements, so to counteract this,

5952-523: 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

6045-473: 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

6138-439: The other races of that series. Italian driver Alberto Ascari was the only European-based driver to race in the 500 during its World Championship years. His appearance in 1952 in a Ferrari was also the only time a Ferrari has ever appeared in the race. Juan Manuel Fangio practiced at the track in 1958 but declined an offer to race. Control issues of monetary prizes and squabbles over technical regulations caused conflict in

6231-530: The purpose-built V-8 quad-cam engines. While the "stock block" engines were technically legal in CART competition, they were not given the increased boost advantage, which effectively rendered them uncompetitive, and precluded their use by teams. The most famous manifestation of the USAC rules disparity was the Ilmor -built Mercedes-Benz 500I engine fielded by Roger Penske in 1994 . Teams may enter up to two machines under

6324-513: The race has always been scheduled on or around Memorial Day . Since 1974 , the race has been specifically scheduled for the Sunday of Memorial Day weekend. The Sunday of Memorial Day weekend is widely considered one of the most important days on the motorsports calendar, as it is the day of the Indianapolis 500, the Coca-Cola 600 , and (usually) the Monaco Grand Prix . Practice and time trials are held in

6417-439: The race in front of 300,000 stunned Germans. The P3's agility and versatility enabled it to win 16 of the 39 Grands Prix in 1935, cementing its status as a truly great racing car. Monoposto 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

6510-429: The race is not held in wet conditions. In the event of a rain delay , the race will be postponed until rain showers cease, and the track is sufficiently dried. If rain falls during the race itself, officials will halt the race (red flag) and await safe conditions. The officials can end the race and declare the results official if more than half of the scheduled distance (i.e., 101 laps) has been completed. If less than half

6603-418: The race officially reverted to the "International Sweepstakes" moniker, as printed on the tickets and other paraphernalia, with slight variations over the years. Following WWII , the race was commonly recognized as "The 500", "The 500-Mile Race", "Indianapolis 500-Mile Race", "Indianapolis 500", or the simple form "Indy 500". Usually the ordinal (e.g. "50th") preceded it. Often the race was also advertised on

6696-425: The race, work on the car is permitted, but it is usually limited to routine pit stop work (changing tires and refueling) and minor adjustments (wing angles, etc.) Pit stop activity is rigorously rehearsed by the crews and in modern times, routine pits stops are regularly completed in under ten seconds. Other more involved work, such as replacing damaged bodywork (wings, nose cones, etc.), can also be completed quickly by

6789-451: The race. Throughout the years, the race has used several different qualifying procedures. The current four-lap (ten-mile) qualifying distance was first introduced in 1920 and has been used every year since 1939. Presently, qualifying occurs on over two days. On Day 1, positions 13–30 (or 13–33 if there are only 33 entries) have their position set with all other positions set on Day 2. Following Fast Friday practice, all cars are entered into

6882-399: The radio as the "Annual Memorial Day race", or similar variations. By the late 20th century, the term "Indy 500" had slowly emerged as the most common and most popularly used moniker. As such, since 2016, the official race logo has used the contemporary and colloquial term "Indy 500". For the 1981 race , the name "65th Indianapolis 500-Mile Race" was officially adopted, with all references as

6975-489: The riding mechanic. In 1935, Miller's former employees, Fred Offenhauser and Leo Goossen , had already achieved their first win with the soon-to-become famous 4-cylinder Offenhauser or "Offy" engine. This motor was forever connected with the Brickyard's history with a to-date record total of 27 wins, in both naturally aspirated and supercharged form, and winning a likewise record-holding 18 consecutive years between 1947 and 1964. Meanwhile, European manufacturers, gone from

7068-522: The series. Firestone , which has a deep history in the sport, dating back to the first 500, is currently the exclusive tire provider. The traditional 33-car starting field at Indianapolis is larger than the fields at the other IndyCar races. The field at Indy typically consists of all of the full-time IndyCar Series entries (roughly 20–22 cars), along with roughly 10–15 part-time or "Indy-only" entries. The "Indy-only" entries, also known as "One-offs", may be an extra car added to an existing full-time team, or

7161-403: 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

7254-583: The start of the 2020 Bahrain Grand Prix , Romain Grosjean collided with Daniil Kvyat in which his car broke in two and burst into flames as it split the barrier. The halo helped protect Grosjean from possible decapitation while it allowed him to escape from the fire. Indianapolis 500 The Indianapolis 500 , formally known as the Indianapolis 500-Mile Race , and commonly shortened to Indy 500 ,

7347-579: The start of the race, the Purdue All-American Marching Band has been the host band of the race since 1919. In 1946, American operatic tenor and car enthusiast James Melton started the tradition of singing " Back Home Again in Indiana " with the Purdue Band before the race when asked to do so on the spur of the moment by Speedway president Tony Hulman . This tradition has continued through

7440-421: The start, the annual singing of the chorus of " Back Home Again in Indiana ", and the victory lane bottle of milk. Also unique is that qualifying requires the driver to complete four, rather than one, timed laps, and the time trials are conducted on a separate weekend. The official attendance is not disclosed by Speedway management, but the permanent seating capacity is upwards of 250,000, and infield patrons raise

7533-440: The total race-day attendance to a range of approximately 300,000–350,000. The Indianapolis Motor Speedway complex was built in 1909 as a gravel-and-tar track and hosted a smattering of small events, including ones for motorcycles . The first long-distance event, in "fearful conditions", was the 100-lap Prest-O-Lite Trophy in 1909, won by Bob Burman in a Buick . The breakup of the track surface led to two fatal accidents in

7626-418: The track's circumference. During the 1910 Decoration Day weekend, the first events on the newly paved circuit drew 60,000 spectators; Ray Harroun won the 200-mile (320 km) Wheeler-Schebler Trophy in a Marmon . The crowds grew progressively smaller for the rest of the season, however, so the track owners chose to focus on a single race, and considered a 24-hour contest, in the fashion of Le Mans , or

7719-574: The two weeks leading up to the race, while miscellaneous preliminary testing is held as early as April. The race is the most prestigious event of the IndyCar calendar, and one of the oldest and most important automobile races. It has been reported to be the largest single-day sporting event in the world. Likewise, the Indianapolis Motor Speedway itself is regarded as the world's largest sporting facility in terms of capacity. The total purse exceeded $ 13 million in 2011 , with over $ 2.5 million awarded to

7812-410: 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

7905-400: The winner, making it one of the richest cash prize funds in sports. Similar to NASCAR 's Daytona 500 , the Indianapolis 500 is typically held early in the IndyCar Series season. That is unique to most sports where major events are usually at the end of the respective season. Currently, the Indy 500 is the sixth event of the 17-race IndyCar schedule. From the 1970s to the 1990s, Indianapolis

7998-407: The years, notably by actor and singer Jim Nabors from 1972 until 2014. Nabors announced in 2014, citing health-related reasons, that the 2014 Indy 500 would be the last at which he would sing the song. In 2015, the a cappella group Straight No Chaser sang the song before the race, and in the two races held after Nabors' retirement (and before he became the regular singer), the singing of the song

8091-522: Was bored out to 3.2 litres for Nuvolari for the 1935 German Grand Prix at the Nürburgring , in the heartland of the Mercedes and Auto-Union empire. In the race, Nuvolari punctured a tyre early on while leading, but after his next pitstop he carved back through the field until the last lap when Manfred von Brauchitsch , driving the more powerful Mercedes Benz W25, suffered a puncture, leaving Nuvolari to win

8184-494: Was done on a rotating basis, with the Spring 2014 winner of The Voice Josh Kaufman performing in 2016. However, the Speedway has returned to a standard singer with Jim Cornelison doing it since 2017. Following the European trends, engine sizes were limited to 183 cu in (3,000 cc) during 1920–1922, 122 cu in (2,000 cc) for 1923–1925, and 91 cu in (1,490 cc) in 1926–1929. The 1920 race

8277-496: Was held in 1911 and was won by Ray Harroun . The event celebrated its 100th anniversary in 2011 , and the 100th running was held in 2016 . The event was put on hiatus twice, from 1917 to 1918 due to World War I and from 1942 to 1945 due to World War II . In two different periods, the race was part of FIA World Championships ; between 1925 and 1928 , the World Manufacturers' Championship and between 1950 and 1960 ,

8370-423: Was known from its inception in 1868 to 1967, when federal law made "Memorial Day" the official name), run to a 600-cubic-inch (9,800 cc) maximum engine size formula. It saw a field of 40 starters, with Harroun piloting a Marmon Model 32-based Wasp racer—outfitted with his invention, the rear-view mirror . Harroun (with relief from Cyrus Patschke ) was declared the winner, although Ralph Mulford protested

8463-473: Was often the second or third race of the season, and as late as the 1950s, it was sometimes the first championship event of the year. Due to the high prestige of the Indianapolis 500—rivaling or even surpassing the season championship—it is not uncommon for some teams and drivers to focus heavily on preparing for that race during the early part of the season, and not focus fully on the championship battle until after Indy. Due to safety issues such as aquaplaning ,

8556-580: 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

8649-467: Was won by Gaston Chevrolet in a Frontenac , prepared by his brothers, powered by the first eight-cylinder engine to win the 500. For 1923, riding mechanics were no longer required. A supercharged car, ID, first won the race in 1924. In 1925, Pete DePaolo was the first to win at an average over 100 mph (160 km/h), with a speed of 101.13 mph (162.75 km/h). In the early 1920s, Miller built his 3.0-liter (183 in ) engine, inspired by

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