The team must build and bring one pre-constructed, autonomous or manual, wireless car. Participants have to submit a portfolio of their car, consisting of various details and a video of the working model before the competition.
5.1.0. Dimensional Specifications
- Length (maximum distance in front and rear tires end to end) – 60 cm
- Width of the car – maximum 30 cm
- Height (measure with suspension fully compressed) – maximum 30 cm
- Buggy or other off-road style body that resembles an actual off-road racing type
- Sensor based or sensor less motors are allowed in all-electric classes.
- “Roll-over” antennas are allowed in on-road classes only, not in any oval or off-road classes. The exposed ends of such antennas must be fitted with a button or ball having a diameter of at least 5/16”.
- Batteries must be sealed, immobilized electrolyte type (gel cell, lithium, NiCad, or dry cell)
- Teams can procure brake system, suspension, servo motors readily available in market.
- Any part/building material can be used until the vehicle meets the above specifications and if the design and construction are primarily the original work of the team as ready-made vehicles are not allowed to compete.
5.2.0. Radio Equipment
- Radio systems are limited to the use of two channels for operating two servos.
- 2.4 GHz DSM/DSS systems or any frequency are allowed but should notify the transmission technology, and crystal frequency to referee.
- No advancement in radio apart from car controlling/regulating/fine tuning/trimming will be entertained.
- Changing frequencies by interchanging transmitter and receiver crystals (reversed frequencies) is prohibited.
- No traction control system is allowed. Only steering servo and throttle servo will be operated by radio, any mislead will lead to disqualification and will have to pay a penalty of destruction.
- Vehicle should have a fail-safe system that will positively return the vehicle’s throttle to an idle position if the vehicle loses electrical power or its radio signal.
5.3.0. Brake Specifications
- All vehicles must be equipped with a working brake system capable of stopping the vehicle and holding it motionless with the motor running.
5.4.0. Tyres
- Only rubber tyres can be used. Cutting or modifying the tread is allowed.
- Trimming the mounting bead of a tyre to fit a legal rim is allowed.
- Cutting tyres from the same class to fit wheels of the same is not allowed, regardless of whether it fits minimum tyre dimensions or not.
5.5.0. Battery
- Lithium Polymer battery packs may be used to power electric racing cars.
- Battery allowed voltage – 7.4V to 11.1V and capacity 1050 mAh to 2500 mAh.
- Batteries cannot be charged or changed during a standard-length race.
5.6.0. Transmission and Drive
- Single speed transmissions with 2WD (two-wheel drive) or 4WD is allowed.
- Rear suspension – Independent vehicle.
