Technical
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CADET CLASS |
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Before
you race
Anyone can
start racing at the age of 8; but the only class that you will eligible
for is the Cadets. {see details below}. The Cadets upper age limit
is 13, meaning that you can race to the end of the year of your 13th birthday.
My birthday is January 1st, so I will be able to race for the whole year
following my birthday; that is if I'm not too heavy for the minimum weight
limit {see below}. Protective clothing One of the main requirements before I could drive around a kart track, was to be equipped with the approved protective clothing. The requirements for the clothing are specified in the MSA 'blue book'. The crash helmet and race suit have to meet approved standards. Strong gloves and boots that cover the ankles are also required. I also wear a body protector and neck brace. The Kart There are currently three classes of Cadets. They can and often do, race together. All have centrifugal clutches {the clutch engages automatically as the engine revolutions rise} and two of the class engines are started by pulling a recoil starting cord. The person attending the kart, usually a guardian usually operates this. The typical top speed of these karts is around 60 mph, which seems considerably faster when you are only about 10cm off the ground! One of the top Championships is the BRDC Stars of Tomorrow, which takes the form of the British Cadet Championship. The three Cadet classes are Comer Cadet, Honda Cadet and WTP Cadet. I compete in a Comer Cadet. The principle difference between the classes is the type of engine used: Comer Cadet
~ uses a 60cc sealed two stroke Comer engine. Any engine builds have to
be carried out by approved service agents. Most circuits run the Comer Cadet class, but not all clubs run the Honda and WTP Cadets. This was one of the reasons that we chose to race Comer Cadets. There is a variety of chassis that are used; Zip, Shark and TonyKart are just three of the makes available. I race a Zip Kart; the chassis type is a Blade. The modifications allowed to the chassis are specified in the regulations, along with a minimum weight limit. This includes the weight of the driver, protective clothing and the fuel in the tank. If the weight is below the minimum requirement, currently 97kg, ballast weights have to be added to the kart in a suitable position. The choice of final gearing sprocket is free and is quite critical for optimum lap times. Knowledge of the circuit, weather conditions and maximum engine revs obtained during testing, all help in deciding the 'best' gearing. For all of the Cadet classes, only two types of tyre are allowed. These are:- Dry
Tyres ~ Dunlop SL3 'RAC' Tyre pressures are free and can make a considerable difference to lap times and tyre wear in the various conditions. Yet again, experience will help in deciding the 'optimum' pressures. Most karts these days have 'onboard' digital displays, often mounted on the steering wheel. These give engine temperature information, maximum engine revs and lap times. All of this information is stored for inspection after the testing or racing. Timing is obviously very important in any form of motorsport but arguably not quite so important in kart racing, as the starting position during the heats is not decided on times. I will explain more about this in the section called 'On Race Day'. Even so, the lap times give a very good indication on how competitive the driver and kart combination is compared to other competitors. Each kart carries a small {about 50mm x 80mm x 15mm} electronic unit, called a transponder. This is, normally mounted behind the seat and senses the metal strip set into the track surface, normally at the start/finish line. Some circuits have more than one strip, giving the driver sector time information. Each transponder is individually coded, so race control can produce lap times for each kart and keep a record of finishing places. The transponders are normally checked by race control before racing begins. Flag Signals Officials are positioned around the circuit to help with any incident, observe and report on driving standards and to give information to the competitors during the testing and race sessions. The method used for this is by means of a variety of flag signals. Knowledge of these is essential and as I have said before, is tested during your ARKS test. The flags currently used in kart racing are as follows:- Green Flag
~ start of the race.
Now practice
can begin, normally in order of the various class races. Cadets normally
practice first. The number of laps is normally only three, but this gives
enough time for the track to be assessed and the kart to be given a final
testing. After everyone has practised, the heats for the various classes
begin. Some circuits have two heats, some have three. Grid positions in
these heats are not determined by lap times, but are allocated
to give every driver an equal chance of success. So for example, if there
are two heats, I could be drawn on pole position for heat one and last
position on the grid for heat two. One exemption is for Novice drivers
{someone who hasn't received a full competition licence}; the driver in
this instance will always start at the back. The points obtained in the
heats determine where I will start the final; so for example, if I finished
the first heat in 4th position and finished the second heat in 12th position,
I will start the final in 8th position, or thereabouts. The race control
publishes the exact positions before the final begins. I hope this has been useful to anyone new to karting. Ross Gunn |