21.5T Rules

21.5T Touring Car Rules

Chassis

Two-wheel drive to front or rear wheels or four-wheel drive is allowed. Chassis must have independent suspension on all four wheels. Each driven wheel must have a flexible joint, eg: dog bone/s or universal joint/s in its driveshaft. Drive train and suspension design is free from restriction. Flat Pan (1/12th and 1/10th Track Style) chassis are not allowed. The Chassis must not be shaped to gain an aerodynamic advantage. In principle the underside of the chassis must be flat and parallel to the ground along the entire length of the body-shell. Aerodynamic shaped parts (splitters/diffusers/tunnels/etc) may not be fitted to the chassis.

Motor

Any ROAR or BRCA approved motor. All brushless motors for the Stock class will be wind rating of 21.5 turns, clearly indicated by the manufacture on the external casing.

Stator, Stock Motor: Only three slot “Y” wound stators are permitted. No delta wound or slot less stators are allowed. Only circular (round) pure copper magnet wire permitted. The three slotted stator must be wound with 21.5 turns of 2 strands of a maximum diameter of 0.0724 mm per slot.

ESC

Speed Controllers as per ROAR BRCA list. Speed controllers eligible for Stock classes must provide zero timing advance, along with disabling advanced motor control functions (i.e. Boost, Cheat Mode, Turbo, etc). When the “0 Boost” profile is enabled, it shall be indicated by a blinking LED while the ESC is armed and in neutral position.

Body Shell

4 door sedan style bodies are allowed that are currently on the IFMAR, EFRA or ROAR body listings, and fit within the GLOBAL BODY SPECIFICATIONS for electric touring cars.

Tyres

Rubber tyres only (24mm)

Hop Ups

Any Hop Ups that are available from the Manufacturer

Batteries

Any 2 cell Hard-cased approved 7.4 Lipo packs as listed on the ROAR or EFRA websites.

Gearing

Gearing is not restricted.

Weight

Minimum 1320 grams ready to run including transponder.