Superkart

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A Formula E/Division 250 cc superkart at Castle Combe, England Superkart.JPG
A Formula E/Division 250 cc superkart at Castle Combe, England

Superkart is a form of motorsport road racing that uses karts on long circuits. The bigger difference between a superkart and most other forms of kart is that they have full aerodynamic bodykits, as well as having a longer wheel base than sprint chassis, and are generally raced on car circuits over 1,500 metres in length. The power unit, most often but not exclusively two-stroke 250 cc engines, can be specially designed kart engines or production motorcycle engines with either five- or six-speed sequential manual gearboxes. Owing to their high top speed and superb cornering ability, a superkart's aerodynamic bodywork includes a front fairing, larger sidepods, and a rear wing. They use either 130-or-150-millimetre-diameter (5 or 6 in) tires and wheels and most often race on full size auto-racing circuits.

Contents

The 250 cc superkarts can set faster lap times than much more expensive and technically advanced racing machines. [1] [2] Some British and Australian classes also include 125 cc gearbox karts. Superkarts race on "long circuits" [3] (e.g. Silverstone, Laguna Seca, Magny-Cours). In the UK they also race on "short circuits" [4] (e.g. Kimbolton); "short circuits" are under 1,500 metres in length. [5] Superkarts are raced worldwide. There is a multi-event CIK-FIA European Superkart Championship (for 250 cc karts only), [6] and there has in the past been a world championship, which was last run in 1995. [7]

Performance

Powered by a two-stroke 250 cc engine producing 75 kW (100 hp) for an overall weight including the driver of 205 kilograms (452 lb), superkarts have a power/weight ratio (including the driver) of approximately 365 W/kg (490 hp/tonne)(0.22 hp/lb), or closer to 730 W/kg (980 hp/tonne)(0.44 hp/lb) without the driver, which is about the equivalent of a midget car, or an open-wheel A1 Grand Prix car. Superkarts can accelerate from 0 to 100 km/h (60 mph) in less than 3 seconds with a top speed of 250 km/h (155 mph). [8] Their low weight and good downforce make for excellent cornering [9] and braking abilities. [10] A superkart is capable of braking from 160 km/h (100 mph) to standstill in around 2 seconds, and taking corners at nearly 3 g (30 m/s²). [11]

Ben Wilshire British 125 Open Class superkart Ben Willshire GP1.jpg
Ben Wilshire British 125 Open Class superkart

British superkart divisions :

Australian superkart divisions :

Superkart racing in Australia has, since 1989, referred to any form of racing kart to race on full-size motor racing circuits, usually as sanctioned by the Australian ASN, CAMS.

United States superkart classes: [14]

250cc Shifter Kart Superkart-With-250cc-Shifter-Kart-Motor.jpg
250cc Shifter Kart

Spectacle

Road & Track reports that superkarts cost between $15,000 to US$20,000 in 2005. [2] Entries of 60 or more are common in Britain. Overtaking tends to be easy, as there is room to get past, so the races tend to be full of action. Race lengths tend to be around 20–25 miles (30–40 km), because the fuel tanks are quite small, so at most meetings that feature superkarts, the karts race is often a brief, spectacular highlight (U.S. superkart races are timed 30-minute races; pre-final on Saturday, final on Sunday).

A global category, superkarts are endorsed by the FIA, and were featured as a support category to the French Formula 1 Grand Prix at Magny-Cours in 2007 where they bettered Porsche Supercup lap times. [1]

See also

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OK-Junior is a kart racing class for top drivers aged 11 to 15.

The Rotax Max 125 Engine is a two-stroke 125 cc (7.6 cu in) engine designed by Rotax, part of Bombardier Recreational Products (BRP), to provide cost-effective but high speed kart racing. Built in Austria, the engine is liquid cooled, equipped with a balance shaft, integrated water pump, electric starter and centrifugal clutch. Its combination of onboard electric starter and centrifugal clutch simplifies its operation. This concept is called TaG (Touch-and-go).

KF2, is a kart racing class for top drivers aged 14 and up.

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KZ1 is a kart racing class using 125 cc water-cooled two-stroke engines yielding approximately 46–50 hp (34–37 kW), equipped with a six-speed gearbox. KZ1 is the fastest of the KZ karting racing categories, and technical regulations are similar to KZ2 except that KZ1 allows for the gearbox to be either manual or electro-mechanical as well as the wise use of soft tires. Both engines and chassis must be approved by the CIK-FIA racing governing commission. It is open to top drivers aged 15 and over. Minimum weight is 170 kg (370 lb), this includes the kart and driver. They can accelerate from 0-100 km/h in 3 seconds. KZ1 has a top speed of 180 km/h (110 mph).

The European KF1 Championship is a kart racing competition organised by the CIK-FIA.

The 2008 Australian Superkart Championship covers national level Superkart racing in Australia during 2008.

KZ2 is a kart racing class using 125 cc water-cooled two-stroke engines yielding about 52 hp (39 kW). The engines are equipped with a 6-speed gearbox. Z2 is the second fastest of the KZ karting racing categories, and technical regulations are similar to faster KZ1 except that in KZ2 the gearbox must be "hand-operated and exclusively mechanical without a servo system", as well as the use of medium tires. Both the engine and chassis must be approved by the CIK-FIA racing governing commission. The class is open to drivers aged 15 years and up with the minimum weight being 175 kg, this includes the kart and driver.

The Australian Superkart Championship is a motor racing series run in Australia under the auspices of CAMS under their Superkart regulations. The karts race on full-size Australian circuits and in 2013 the series was raced at Sydney Motorsport Park and Phillip Island Grand Prix Circuit. As of 2007 the series has raced as part of the Shannons Nationals Motor Racing Championships. The series is one of nine that enjoy full CAMS Australian Championship status.

The 2009 Australian Superkart season covers national level Superkart racing in Australia during 2009. There were three national level race meetings in 2009 all held on the calendar of the Shannons Nationals Motor Racing Championships, the first two covered the Australian Superkart Championship, which was won by Sam Zavaglia. The third event, the stand-alone Pacific Superkart Challenge, was won by Warren McIlveen.

The 2010 Australian Superkart season covers national level Superkart racing in Australia during 2010. There were just two national level race meetings in 2010, both held on the calendar of the Shannons Nationals Motor Racing Championships, making up the 2010 Dunlop Australian Superkart Championship.

The British Superkart Championships are a clustered motor racing series run in the United Kingdom under the auspices of the British Superkart Association under Motor Sports Association regulations. The karts race on full-size British circuits such as Silverstone, Donington, Brands Hatch, Pembrey, Anglesey Circuit, Bishopscourt, Castle Combe, Darley Moor, Snetterton, Croft, Cadwell Park, Thruxton and Oulton Park with the running of the MSA British Superkart Grand Prix at Donington Park which includes the British round of the European Superkart Championship.

KF1 is the top level of karting. It is open to drivers aged 15 and up.

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References

  1. 1 2 Magny Cours F1 - Superkarts fire the crowds imagination !! - 6 July 2007
  2. 1 2 Superkarts — Super Speeds Archived 6 November 2011 at the Wayback Machine - Road & Track, November 2005
  3. CIK-FIA 2011 circuit regulation Archived 26 June 2011 at the Wayback Machine - CIK-FIA, Part 1: Article 6
  4. Race results & reports for all gearbox classes - 8 July 2007 - Kimbolton
  5. Specific Regulations for Karting - Motor Sports Association (MSA), Circuits
  6. CIK-FIA 2011 Karting Technical Regulations Archived 28 September 2011 at the Wayback Machine - CIK-FIA, Article 9: Specific Regulations for Superkart
  7. "CIK-FIA European & World Champions in Superkart 250cc". www.mondial-karting.com. Archived from the original on 9 September 2011. Retrieved 29 June 2011.
  8. "Superkart at Magny-Cours - 2007". Archived from the original on 14 April 2009. Retrieved 7 March 2008.
  9. "Yeah, I can take that right-hander flat-out in 6th gear at just shy of 120 mph." When my face shows disbelief (120 mph?!), he adds, "It moves around a little, but you just keep your foot in it. The rear wing is producing good downforce there and it will hold."Eddie Lawson - Superkart Thrill Ride, page 1 Archived 27 January 2006 at the Wayback Machine - Road & Track,October 2005
  10. "The biggest adjustment compared to cars or even other karts is the speed with which this kart enters turns and how late I can brake for them. Its ability to shed speed is right up there with many open-wheel race cars. Braking is performed in a straighter line than with a rear brake-only sprint kart, though the rate of deceleration is considerably greater." - Superkart Thrill Ride, page 2 [ permanent dead link ] - Road & Track,October 2005
  11. Performance ; 250cc International - Queensland Superkart Club
  12. 1 2 "2011 CAMS Manual of Motor Sport: Australian Titles" (PDF). CAMS. 2011. pp. 13–14. Retrieved 29 June 2011.
  13. "2011 Australian Non Gearbox Superkart Nationals: Sporting Regulations" (PDF). CAMS . Retrieved 29 June 2011.
  14. "United States SuperKarts - USSK". Archived from the original on 25 March 2008. Retrieved 18 February 2008.