2009 BRCA 1:12th Oval Rules

For Hot Rod - Mini Stox & Bangers

as used by Medway Mini Stox Club, For club nights

General Construction Rules

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).

5) No tyre additives are allowed.

6) The use of multiple speed transmissions (gearboxes) is not allowed, only 32dp pitch gears will be allowed.

7) Only one drive motor is allowed per car.

8) ONLY BRCA approved rechargeable cells may be used.

9) 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 20^th.  No testing driver will pick up any points for the series or receive any trophies.

Mini Stox Construction Rules

1) Cars to be 1/12th scale reasonable representation of a full size Mini type car.

2) Any make of servo saver may be used on the steering servo.

3) Any make of track rod or ends may be used.

4) The tyres may be changed from the original kit tyres (sleeved tyres are allowed on the all Mini Stox)

5) Body shells are to be of ABS construction only, all windows must be cut out as per original, (no portholes)

6) Ball races allowed on rear axle only.

7) Only Mini Stox or R12 parts to be used.  No V12 suspension parts. Countersunk screws must not be used on the underside of chassis.

8) Any commercially available speed controller may be used, must have reverse fitted and working. Mechanical to have a maximum retail price of £30-00, Electronic £65-00. Receiver battery packs are allowed.

9) Any holes drilled must be used or filled.

10) The motor may be fitted to either side of the chassis, providing that there is no modification or alteration to the chassis or mounting blocks.

11) Max. width of car including body shell to be the same as the V12 Hot-Rod. Max. length of car, including bumpers if fitted to be 292mm. Bumpers to be fitted externally.

12) Bumpers to be fitted and constructed from a non-metallic material. Width max 160mm but must not protrude beyond the wheels. Height to be no more than 30mm. Front bumper must be grid like with a top and bottom rail. Front and rear bumpers must be fitted to the chassis, not the body shell.

13) Max width of tyres to be front 25.4mm and rear 32mm. Max tyre diameter to be 57mm. Only foam tyres allowed.

14) A maximum of 4 cells and 4.8 volts nominal to be allowed

15) Motors must be Mabuchi RS540SH or the G2 only and must remain unopened. External motor bearings or fine pitch gears are not allowed.

16)  Steel whip aerials and rollover masts are not allowed, and aerials must remain inside the body shell.

17) At BRCA events drivers name and BRCA number must be clearly displayed at the top of the front windscreen, not less than 5mm high. Official BRCA race number must be displayed on both sides of the car.

18) At BRCA events the drivers roof grade colour (if known) must be on the roof of the car either painted or using tape to cover a minimum area 50 sq.mm.

20) Body and chassis must be securely joined at all times the car is on the track. No wings or aerofoils or any under body aids are allowed.

21) Alternative motor pinions may be used, providing no alteration is made to the motor mounting blocks. Motor fluid and additives are allowed.

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

23) There must be a minimum ground clearance of 3mm, this is to include any protruding screws, 1mm clearance for spur gear.

24) Due to the unavailability of some spares for the old Mini Stox, substitute part may be used (such as available and used by the 1/12th Stock cars - i.e. motor mounts & front axle beam), providing they conform to any sizes within the rest of the construction rules.  For clarification, advice must be sort from the BRCA Mini Stox scrutineer.

25) If any scratch built parts are being used.  Parts must be available to other competitors to purchase.

26) Chassis to be single piece & constructed in GRP only, measuring no more than 220mm in length and 80mm in width.  Notches allowed in chassis for wheel clearance.

Hotrod Construction Rules

1) Cars to be 1/12th scale Mardave V12 series chassis with any commercially available body shell.

2) Any make of servo saver may be used on the steering servo.

3) Any make of track rod or ends may be used.

4) The tyres may be changed from the original kit tyres

5) ABS body shells are allowed, all windows must be cut out or clearly defined. Polycarbonate body shells are allowed, windows must remain clear, not tinted or maybe cut out.

6) Ball races allowed on rear axle only. Rear axle and spur gear must remain as kit.

7) Chassis and front and rear wheel carriers and suspension springs to be as kit. Countersunk chassis may be used.

8) Any commercially available speed controller may be used, must have reverse fitted and working. Mechanical to have a maximum retail price of £30, Electronic £65. Receiver battery packs are allowed.

9) Only nine extra holes (max. 3mm) may be drilled in the chassis, two holes must be used for mounting the steering servo, two holes to be used for mounting an on/off switch, and one hole to mount the aerial tube, and a max of four holes for alternative battery mounting, if any of these items are not used, then the holes must not be drilled. Any holes drilled and not used must be filled. Chassis top mounting plate may be changed, altered or removed.

10) The motor may be fitted to either side of the chassis, providing that there is no modification or alteration to the chassis or mounting blocks.

11) External front and rear bumpers are not allowed.

12) Min 20mm.  Max 26mm width of tyres and Max 60mm diameter no Min diameter of tyres, but the tyre must cover the wheel. Any foam tyre compound allowed.  A minimum ground clearance of 3mm.

13) Maximum four cells with a nominal 4.8 volts. Battery mountings may be changed from the original.

14) Motors must be Mabuchi RS540SH, G2 only and must remain unopened. External motor bearings or fine pitch gears are not allowed.  No physical internal alterations to the motor brushes or cranking the com.  Any one found doing so will be banned for one season.

14a) Brushless motors, to be run as a separate class.

15) Steel whip aerials and rollover masts are not allowed, and aerials must remain inside the body shell.

16) At BRCA events drivers name and BRCA number must be clearly displayed at the top of the front windscreen, not less than 5mm high.

17) At BRCA events the drivers roof grade colour (if known) must be on the roof of the car either painted or using tape. The colour must cover all of the rooftop.

18) Aerofoils are allowed but be commercially available

19) Alternative motor pinions may be used, providing no alteration is made to the motor mounting blocks. Motor fluid and additives are allowed.

20) If you intend to alter your car in any way that is not covered by the above, you must check with the V12 Hot-Rod scrutineer, for approval. We expect all drivers to use common sense when modifying cars and to enter into the spirit of the sport.

21) There must be a minimum ground clearance of 3mm; this is to include any protruding screws, 1mm clearance for spur gear.

Banger Construction Rules

1) Use the Hot Rod (V12) chassis or Mini or Rebel, as supplied in the kit; alternatively one made from GRP (max 2mm thickness) may be used. Dimensions are, maximum length 270mm, width 90mm, no additional strengthening allowed.

2) Only V12, Mini, Rebel parts may be used in construction exceptions are:

a) Track rods and servo savers maybe upgraded.

b) Pinion/Spur gears to be 32 dp.

c) Ball Races may be fitted to rear axle assembly only.

d) Electronic speed controller are not permitted, any manual speedboard operated by a wiper arm can be used.

e) Tyres, only foam type may be used.

3) Cells, only 4-cell sub C rated cells.

4) Body shells

a) Body shells to be of ABS moulding.  Windows must be completely removed as per the original car. If moulding has window outlines then these have to be used : No portholes or half windows.

b) Any commercially approved 1/12^th shell.

c) Roof fins may be fitted, no further forward than the middle of the roof, no more than 2 fins allowed plastic only.  Fins to no more than 1” high x 1” wide, no metal fins allowed, they must not possess any sharp edges, and must have the drivers racing number on both sides of the fin.  No wings or aero-foil’s allowed.

d) Strengthening & Repairs are allowed, you may use glue sticks, tape, cable ties, joining plates may be used (metal plates not allowed) in conjunction with nuts and bolts, no screws allowed.  All sharp edges must be filed, and any protrusions must be on inside of the body shell.

e) Name and Number of the driver must be clearly visible on both sides of the body shell at all times.

f) Body shell preparation should be neatly presented, no unsightly rude or offensive slogans, gestures are allowed.

g) Body mounts - you may use 3 or 4 mounts, made from plastic no more than 10mm in diameter and must not protrude more than 10mm through the body shell.  All body clips must be flush with the body shell, there must be at least 1cm (10mm) clearance between shell and chassis front and rear of the car.

h) Roof grade markings must cover the whole of the roof area.

5) No internal or external bumpers are allowed.

6) No additional ballast allowed on the car.

7) Transponder must be fixed onto the car and not the body shell.

8) Additives - only motor cleaning fluids is allowed.  Under no circumstances are tyre additives allowed (instant disqualification for one calendar year if found to be using any).

9) Motors must be Mardave Mabuchi RS540SH or G2 only and must remain unopened. External motor bearings or fine pitch gears are not allowed. No physical internal alterations to the motor brushes or cranking the com. Any one found doing so will be banned for one season.

10) Limos - Maximum width 90mm, 3mm thick, length to suit body shell providing the chassis does not protrude beyond the wheels.  All other rules apply the same.

Warning, if it’s not in the rules then it is not legal, always check with Race Directory before you do it!