BRCA 1/12th National Stockcar
Construction Rules

General Construction Rules 2012

1) No car shall be constructed so as to be dangerous to persons or cause damage to competitor’s cars or to the track surface. No sharp or protruding objects are allowed on the cars.

2) Body and chassis must be securely joined at the start of race and must remain on car during the race. When initially entered at a meeting the body shell must be neatly finished and complete.

3) Steel whip aerials and rollover masts are not allowed.

4) Radio control receivers carried in the car can have either two devices connected, (normally the steering servo and the speed controller) or 3 channel (can be used for flashing lights for club level or superstars for national level). Receiver battery packs are allowed.

5) Tyre’s must be foam or rubber , you can change them from kit suupiled and use sleeves, Tyre additives are not allowed.

6) The use of multiple speed transmissions (gearboxes) is not allowed, only 32dp pitch gears will be allowed. White delrin spur gears (32DP) and holders are allowed, range from 47-54 teeth

7) MOTORS. Only one drive motor is allowed per car.

All Classes to use Mardave G2 motors only.

These must remain unopened, and unmodified – External motor bearings are NOT allowed.

Motor cleaning fluids / additivies are allowed.

Pinion gears; size (number of teeth) is free.

8) BATTERIES. Cells to be sub-C sized , 1.2v nominal.

Stockcars & Saloon Stox = 6 cell, 7.2v Nominal.

Mini Stox, Hotrods & Bangers = 4 cell, 4.8v Nominal.

9) Any commercially available speed controller may be used, Mechanical to £30 max., Electronic £65 max to be used in Stock cars, Hotrods, Saloons and Mini’s. Bangers MUST use mechanical speed controller only.

10) For drivers wishing to develop or modify cars, this should be done and tested at club level. The next stage maybe to test at National level, with the consent of the committee. Any testing at Nationals, will lead to the driver going to the last position after qualifying ie if there are 20 drivers competing, after qualifying the testing driver will be deemed to be 20th. No testing driver will pick up any points for the series or receive any trophies.

11) Ball raced Axles, Rear only allowed. (exception: see stockcar rule 11)

12) There is a minimum ground clearance of 3mm, this includes any protruding screws, 1mm clearance for spur gear.

13) Servo savers, track rods and track rod ends can all be uprated from kit supplied.

14) Limited slip devices and differentials of any kind are not allowed, solid rear axle only.

15) All cars must have reverse fitted and working at the start of the race.

16) If you intend to alter your car in any way that is not covered by the rules, you must check with the class scrutineer, for approval. We expect all drivers to use common sense when modifying cars and to enter into the spirit of the sport.

Stockcar Construction Rules

1) Models to be a reasonable representation of a full size open wheel (Brisca F1 or F2 type car)

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. 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 £185.00. 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 £185.00 or less.

9) Arial tubes to be a maximum height of 200mm from track surface.

10) Tyres must have a minimum 12mm and maximum 26mm width, and maximum 60mm diameter.

11) In addition to general rule 11, ball races are allowed on the front axle.

12) Base plate to be made from GRP only, top chassis to be nylon or polypropylene only

13) Front suspension can be used with no damping allowed..