17.5 GT Class
17.5 GT Class is not a sanctioned class and may not be run at all special events. Should you wish to compete at special events we recommend selection 21.5 Sportsman, 13.5 Stock, or Open. This class is based on a gentleman agreement to run the below specifications at club level.
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 17.5 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 17.5 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 2 door GT 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 Volantie 36 Rubber tyres only (24mm)
Hop-Ups Any hop up available from any 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 1380 grams