1.4 Mechanical parts |
1.4.1 Clutch and transmission |
1.4.1.1 The vehicle must have “idling capabilities” ,i.e. the vehicle must remain stationary with the engine running. |
1.4.2 Turning radius and steering |
1.4.2.1 Vehicle steering must be achieved by one system operated with both hands using a turning motion. |
1.4.2.1.1 The steering must be precise, with no excessive play. |
1.4.2.2 Steering must be achieved using a steering wheel or sections of a wheel. |
1.4.2.2.1 Steering bars, tillers, joysticks, indirect or electric systems are not permitted. |
1.4.2.3 Turning radius: Maximum 6 m. |
1.4.2.4 Driver skills, turning radius and steering precision will be tested. |
1.4.2.4.1 In particular, inspectors will verify that steering is precise, with no excessive play. |
1.4.3 Wheels |
1.4.3.1 Rim diameter. |
1.4.3.1.1 Minimum rim diameter: 13 inches (33.02 cm). |
1.4.3.1.2 Maximum rim diameter: 17 inches (43.18 cm). |
1.4.3.2 The wheels located inside the vehicle body must be made inaccessible to the Driver by a bulkhead. |
1.4.3.2.1 Any handling or manipulation of the wheels is forbidden from the moment the vehicle arrives at the starting line until it crosses the finish line. |
1.4.4 Tires |
1.4.4.1 The choice of tires is free as long as they are fitted on the type and sizes of rims recommended by their manufacturers. |
1.4.4.1.1 Minimum tread: 1.6 mm. |
1.4.4.2 The width of the tires/rim assembly is measured with the tire fitted on its rim at its rated pressure. Caution: The manufacturer’s size indications should not be taken as measure, as the width of the rim directly impacts the width of the rim/tire assembly. |
1.4.4.2.1 Minimum width of rim/tires assembly: 80 mm (measured from sidewall to sidewall). |
1.4.5 Braking |
1.4.5.1 The vehicle must be equipped with a four-disc hydraulic brake system. |
1.4.5.2 The system must be equipped with a brake pedal. |
1.4.5.2.1 Minimum surface area of brake pedal: 25 cm2. |
1.4.5.3 The brakes must operate independently on the front and rear axles or in an X pattern (i.e. right front wheel with left rear wheel, and left front wheel with right rear wheel). |
1.4.5.4 A single master cylinder may be used, provide that it has a dual circuit (two pistons and dual tank). |
1.4.5.5 The vehicle must remain immobile when it is placed on a 20 % incline with the main brake in place. |
1.4.5.5.1 Race Inspectors may check the brakes again just prior to start. |
1.4.5.6 Wet weather capability is mandatory (see Article 5.6) |
1.4.6 Wet weather running (mech) |
1.4.6.1 Must be able to race during conditions of light rain/drizzle. |
1.4.6.2 The vehicle must be adequately ventilated to prevent driver’s compartment from fogging. |
1.4.6.3 Windscreen wiper(s) |
1.4.6.3.1 The vehicles must be equipped with an effective electric windscreen wiper(s). |
1.4.6.3.2 (mech) The operation of the wiper assembly must be activated by an independent switch easily accessible to the driver. |
1.4.6.3.3 (mech) The wiper operation must provide the driver a clear view. |
1.4.6.4 The vehicle’s brake effectiveness may be re-inspected before and/or after any run. |
1.4.6.5 The vehicle’s electrical system must be suitable for wet weather conditions (e.g. will not malfunction during wet conditions). |
1.4.7 Requirements specified by team |
1.4.7.1 Brake circuit |
1.4.7.1.1 Braking force 20%slope |
1.4.7.1.1.1 Breaking force must be <200N. |
1.4.7.1.1.2 Breaking force should be <100N |
1.4.7.1.2 Mean time to failure |
1.4.7.1.2.1 Mean time must be >6h. |
1.4.7.1.2.2 Mean time should be >100h. |
1.4.7.1.3 Weight |
1.4.7.1.3.1 Weight must be <3.5kg |
1.4.7.1.3.2 Weight should be <2kg |
1.4.7.2 Steering |
1.4.7.2.1 Force required from driver |
1.4.7.2.2 Play in steering |
1.4.7.2.3 Time to failure |
1.4.7.2.3.1 Time to failure must be >6h. |
1.4.7.2.3.2 Time to failure should be >100h. |
1.4.7.2.4 Turning radius |
1.4.7.2.4.1 Turning radius should be <5m. |
1.4.7.2.4.2 Turning radius must be <6m |
1.4.7.2.5 steering weight |
1.4.7.2.5.1 Weight must be <3kg. |
1.4.7.2.5.2 Weight should be <2kg. |
1.4.7.3 Front suspension |
1.4.7.4 Rear suspension |
1.4.7.5 Wheel |
1.4.7.5.1 Outer diameter |
1.4.7.5.1.1 Maximum radius of 17' (43.2cm) |
1.4.7.5.1.2 Minimum radius of 13' (33cm). |
1.4.7.5.2 Cross-section with tire |
1.4.7.5.2.1 Must be >80mm. |
1.4.7.5.3 Wheels´ weight |
1.4.7.5.3.1 Weight must be <2.5kg |
1.4.7.5.3.2 Weight should be <1.5kg |
1.4.7.5.4 Withstand angular torque caused by deceleration of rotating mass |
1.4.7.5.5 Withstand lateral force caused by cornering |
1.4.7.5.6 Withstand vertical force caused by weight of the car plus driver and g-forces |
1.4.7.6 Engine wheel |
1.4.7.6.1 Easy to mount and dismount the engine from rim |
1.4.7.6.2 Lightweight |
1.4.7.6.3 Possible to adjust and balance engine |
1.4.7.6.4 Safe,reliable and durable solution |