Stockcar Construction Rules
1) Models to be a reasonable representation of a full size open wheel (Brisca F1 or F2 type car) and to have a minimum ground clearance of 3mm and 1mm under gear at scrutineering.
2) Overall chassis length to be between 285mm and 310mm. Overall chassis width to be a maximum of 160mm.
3) Front and rear bumpers must be fitted, and have a contact surface between 9mm and 16mm. The distance between the bumper centreline and the ground must be between 32mm and 41mm. All bumpers must be plugged and have no sharp edges and must be constructed from a non-metallic material.
4) Over riders must be bolted to front and rear bumpers. The height from the top of the bumper to the top of the overrides must be between 19mm and 32mm at the front and must have a maximum of 19mm at the rear.
5) Nerf bars must be fitted on the same level as the bumpers and attached to the chassis rails with a maximum contact surface of 10mm.
6) Bodies and aerofoils must be made from ABS or polycarbonate, metal bodies or aerofoils are not allowed. All four windows must be cut out on both Lexan and ABS Shells. The height of the body roof from the floor to be between 88mm and 126mm. Aerofoils if fitted must have no sharp edges and be mounted in a safe manner. The maximum size of the centre panel to be no more than 126mm-126mm, and the side panels 126mm-70mm.The roofs must be painted down to the waistline of the body with the drivers classification colour, if an aerofoil is fitted, this alone may be painted with the drivers classification colour, if the driver wishes.
7) Driver's national race number must be displayed on the exterior of the car, with a minimum height of 10mm. Any colour may be used but it must be legible. Only one racing number allowed per membership. Racing numbers will be available for renewal from the 1st January until the 28th February each year. Any numbers not registered by that date will be allocated on a first come, first served basis. The drivers name must be on the outside of the body.
8) The cost of the complete car excluding radio equipment and cells must not exceed £145.00. In the case of scratch built cars the entrant must be prepared to produce replicas of the car if so required for a price of £145.00 or less.
9) Motors must be Mabuchi RS540SH / Irvine Topaz / or the V14 only and must remain unopened. External motor bearings or fine pitch gears are not allowed.
10) Batteries to be sub C sized cells only, and be 23mm diameter and 42mm length rated @ 1.2 volts per cell, with a maximum of 6 cells and 7.2 volts nominal, all types of dry cells to be permitted
11) All cars will have reverse fitted and must be checked before each race.
12) Electronic speed controllers are not allowed.
13) Limited slip devices and differentials of any kind are not allowed solid rear axle only.
14) Steel whip aerials and anti roll masts are not allowed. Arial tubes to be a maximum height of 200mm from track surface.
15) Tyres must have a minimum 12mm and maximum 26mm width, and maximum 60mm diameter. Tyre additives are not allowed.
16) Ball races allowed on rear axle only.
17) Base plate to be made from GRP only, top chassis to be nylon or polypropylene only.