BRCA 1/12th National Stockcar
Construction
Rules 2004
1)
Models to be a reasonable representation of a
full size open wheel (Brisca F1 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 305mm. 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, and shall not project beyond the
outer edges of the wheels. 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 and must not project beyond outer edge of the wheels.
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, this
includes the aerofoil if fitted.
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, including Nickel Metal Hydroid Batteries
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.