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superkart : ウィキペディア英語版
superkart

Superkart is a form of motor racing in which the class is a racing vehicle sized like a kart but with several characteristics more strongly associated with open-wheel racing cars.
The most obvious difference between a Superkart and any other form of kart is that they have full aerodynamic bodykits and can race 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 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 tires and wheels and most often race on full size auto-racing circuits.
250 cc Superkarts often set faster lap times than much more expensive and technically advanced racing machines.〔(Magny Cours F1 - Superkarts fire the crowds imagination !! ) - 6 July 2007〕〔(Superkarts — Super Speeds ) - ''Road & Track'', November 2005〕 Some British and Australian classes also include 125 cc gearbox karts.
Superkarts race on "long circuits"〔(CIK-FIA 2011 circuit regulation ) - CIK-FIA, Part 1: Article 6〕 (e.g. Silverstone, Laguna Seca, Magny-Cours). In the UK they also race on "short circuits"〔(Race results & reports for all gearbox classes - 8 July 2007 - Kimbolton )〕 (e.g. Kimbolton), "short circuits" are under 1,500 metres in length.〔(Specific Regulations for Karting ) - Motor Sports Association (MSA), Circuits〕
Superkarts are raced worldwide. There is a multi-event CIK-FIA European Superkart Championship (for 250 cc karts only),〔(CIK-FIA 2011 Karting Technical Regulations ) - CIK-FIA, Article 9: Specific Regulations for Superkart〕 and there has in the past been a World Championship, which was last run in 1995.〔(【引用サイトリンク】title=CIK-FIA European & World Champions in Superkart 250cc )
==Performance==
Powered by a 2-stroke 250 cc engine producing 62 hp for an overall weight including the driver of 205 kilograms, Superkarts have a power/weight ratio of 440 hp/tonne (330 W/kg)(c.5 lbs/hp). Superkarts can accelerate from 0 to 60 mph in less than 3 seconds with a top speed of 155 mph (250 km/h).〔(Superkart at Magny-Cours - 2007 )〕 Their low weight and good downforce make for excellent cornering〔''"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 ) - Road & Track,October 2005〕 and braking abilities.〔''"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 ) - Road & Track,October 2005〕 A Superkart is capable of braking from 100 mph (160 km/h) to standstill in around 2 seconds, and taking corners at nearly 3 ''''g'''' (30 m/s²).〔(Performance ; 250cc International ) - Queensland Superkart Club〕
At some circuits, Superkarts are the outright lap-record holders,〔(Morgan Park Raceway Lap Records )〕 at others they run at around Formula 3 lap times.
British Superkart Divisions :
(詳細はsprint kart class uses lighter chassis than the 250's.
*125 ICC (KZ) - Powered by similar 6-speed 125 cc engines to the 125 Open class with tighter tuning restrictions, this CIK sprint kart class hosts some of the closest Superkart racing in the UK.
Australian Superkart Classes:〔(【引用サイトリンク】title=Superkarts Australia: Superkarts Classes )
(詳細はCAMS.
*250 cc International - commonly referred to as ''twins'' or ''inters'', these karts are powered by twin cylinder engines and usually have 6-speed sequential gearboxes. Several European and North American chassis are popular in addition to locally developed designs.
*250 cc National - single cylinder class, the 250 National class is powered by 250 cc motocross engines and also feature 6-speed sequential gearboxes.
*125 cc Gearbox - most often powered by 125 cc Honda and Yamaha Grand Prix motorcycle engines equipped with six speed sequential gearboxes, this Superkart class uses mostly the same chassis as the 250 classes. They run at lighter weights than the 250 classes, which makes for close racing with mid-field 250 Nationals at some circuits.
*80 cc Gearbox - also dominated by Honda and Yamaha motor cycle engines, 80 cc gearbox Superkarts is no longer a sanctioned class in Australian racing. Some 80 cc karts were noticeably smaller than 125/250 cc gearbox karts, with 'laydown' style karts, where the driver lies flat in the kart rather than sitting upright, proliferating. Last contested at national level in 2005.〔 and state level in 2008, some 80 cc karts survive racing in the 125 cc division at state level, but are uncompetitive as they no longer run at lighter homologated weight levels.
*125 cc Rotax Max - a cross-over class from Australian short-circuit non-gearbox sprint kart racing to allow easier and cheaper graduation from Sprint karting to long circuit racing. Three national championships exist for two weight divisions, Heavy and Light, and also sometimes a Junior division for drivers under the age of sixteen which run a version of the Rotax Max engine without a power valve. Rotax Max karts frequently race amongst gearbox equipped Superkarts at state championship level, while racing for their own titles at national level.
*100 cc Another non-gearbox class, 100 cc also was split into Heavy, Light and Junior classes, and was last contested in 2002 and has since been replaced completely by Rotax Max.〔
United States Superkart Classes:〔(United States SuperKarts - USSK )〕
*250 cc Formula/E or F/E - Twin cylinder, 6-speed, liquid cooled Grand Prix motorcycle engines such as the Honda RS250, Yamaha TZ250 or made for karting engines such as the BRC250.
*250 cc Inter-Continental E or IC/E - Single cylinder, 5 or 6-speed, liquid cooled Grand Prix motorcycle engines.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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