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Formula One rules

Chassis must be one of the following: Tyco/Mattel 440x2, Life Like M, Micro Scalextric (with braids), Tomy Racing Turbo, Tomy Mega-G, Mega-G+, Tomy Super-G+ or Viper-Jet (F1 Classic Cup). No part of the chassis may be cut, sanded, drilled or otherwise interfered with. All wear must be by natural means only. No components may be glued in place. No part of the car can exceed 34mm in width and 17mm from centreline to sides.

Bodies must be open-wheeled and constructed entirely of molded plastics or cast resin. Lexan bodies are not permitted. Bodies may be lightened or ballasted, but ballast must be glued firmly in place.  Any method of body fitment is permitted. Devices designated as clips are not considered a chassis part and must not be glued to chassis, they can be glued to bodies.  Front wings can be re-enforced or removed. Rear wings must be intact at the start of the evening. No body should be permanently glued to a chassis or any of its components.

Motors: Motor magnets must be stock items and in stock location. Magnets must not be shimmed or glued in place. Magnets may be marked to indicate polarity. Armatures must be stock and therefore not be 'worked up' in any way (examples: commutator tied-off, windings or epoxied, windings removed, commutator cut or diamond-trued, solder on tabs beyond factory-applied).  Armatures with balance marks or material removed from rotors by any means are not permitted.  Armature timing may not be altered, except via legal devices fitted as part of chassis. Micro Scalextric must run with stock can motor with 'fly-wheel'. Tomy Turbo must run with standard 6 ohm red-wound Mabuchi motor. Super-G+ must run with standard 6 ohm Tomy armature. Mega-G+ must run with stock can motor which may be glued to the rear bulkhead.

Rolling-element bearings (ie with ball bearings) are not permitted.

Traction Magnets must be stock items in stock location. Magnets must not be shimmed or glued in place. Magnets may be marked to indicate polarity and may be ‘flipped’. F1 Classic Cup cars must have traction magnets removed and replaced with brass weights (see below).

Guide pin: Any make is permitted, one per car, but it must only have one protuberance The protuberance must have a consistent outside diameter (no blades). It is permitted to reduce width or length of the protuberance.

Electrics: Any make of pick-up shoe and spring is permitted. Micro Scalextric chassis must run with pick-up braids (any make). Shunts are not permitted. Parts may be reshaped but no material may be added or removed.  For chassis with barrel brush systems, any make of brush and brush spring is permitted in all chassis. Barrels must be stock and unaltered.  For chassis with endbell brush systems, all parts must be stock, and unmodified. VSR Standard Endbell may be used in SG+ due to scarcity of original parts. Endbell tabs may be reshaped but no material removed or added.

Axles, Hubs & Tyres: Any make of plastic front wheels and solid axle is permitted. No sharp edges will be permitted. Independent Front ends are not permitted.

Wheels may be built up with tape to aid tyre retention.  Rear axle cannot be pinned. Original Tomy axle retainer may be used on Turbo and Super-G+ chassis only. Any type of plastic rear wheels can be used, but must have no sharp edges. Tyres must be single compound and black or Hot Pink in colour. O-rings or 'thinnies' may be as front tyres. All permitted tyre types may be re-shaped or reduced in diameter and width.

Tyco 440x2, Tomy Racing Turbo, Tomy Mega-G+, Life Like 'M', Micro Scalextric (with braids) and all F1 Classic Cup cars have the option of using any size rear tyres.

Tomy Mega-G and Tomy Super-G+ (running with traction magnets) have a minimum rear tyre height of .453” (11.5mm). For example, stock hubs and .458” 'Tomy' Supertires. Tyre heights will be checked at the start of racing and may be re-checked at the start of each set of heats and finals.

Gears: Any make of plastic gear (crown or pinion) is permitted, but they may not be altered from their factory specification in any way other than as a result of the usual 'lapping in' procedures. Lightning or sanding/boring to improve fitment is expressly forbidden.  Any make of gear boss and axle spacers is permitted.  Pinions must have 7 teeth, crown gears must have 25 teeth. The Tomy Racing Turbo may use its stock 22 tooth crown gear. The Viper V-Jet (F1 Classic Cup) may use its stock 23 tooth crown gear. Tomy Mega-G+ must use stock rear axle, crown gear and gear boss.

F1 Classic Cup: This is now a brass-weighted class. Eligible chassis include the Viper-Jet (with front and rear brass weights), Tomy Racing Turbo (with rear brass weight), Tyco 440x2 (with rear brass weights) or Tomy Super-G+ (with rear brass weights). These chassis must be used in all heats and finals to score F1 Classic Cup points.

Brass Weights & ballast: These may be commercially produced (by Viper, JW’s HO Speed Parts or BSRT) or can be home-made from brass rod. Rear weight must be held securely by the standard magnet clip. Weights must not be permanently glued to the chassis, although glue dots may be used. Rear weights must be fitted in place of traction magnets. Front weights may be fitted to the corresponding holes in the Viper chassis. Other F1 Classic Cup chassis may be ballasted between the front motor bushing and front of the chassis using Blu-tak or tungsten putty.

Tyres: There is no minimum tyre size for F1 Classic Cup cars.