Document ID: chunk:federal_register_of_legislation:F2006L03060:body:0:p13
Version: federal_register_of_legislation:F2006L03060
Segment Type: other
Provision Reference: 
Character Range: 35829–38719

speed shall be calculated by assuming a tyre radius equal to the 'Static Loaded Tyre Radius' specified by the tyre manufacturer.

38.3.8.5.                    Burnishing, if conducted, shall consist of:

            (1) not more than 200 stops such that any instantaneous deceleration does not exceed 3.1 m/s2 from a maximum speed of 65 km/h. The initial brake temperature for each stop shall be not less than 155 and not more than 200o C; and

            (2) not more than 200 additional stops from a maximum speed of 65 km/h at a deceleration not exceeding 3.1 m/s2. The initial brake temperature for each stop shall not be less than 230 and not more than 290o C. After burnishing, the 'Brakes' will be adjusted in accordance with the 'Manufacturer's' recommendations.

38.3.8.6.                    Brake temperature shall be increased to the
specified level by conducting one or more stops from not more than 65 km/h at a deceleration not exceeding 3.1 m/s2, or decreased to a specified level by rotating the drum or disc at a constant speed not exceeding 50 km/h.

38.3.8.7.                    Speeds, decelerations and time specified in clause 38.3.8 shall be achieved within the following tolerance limits:

Speeds.  +5, -1 km/h

Decelerations:  +0.25, -0.25 m/s2

Times:  +5, -5 seconds.

38.3.9.                          Service Brake Effectiveness - Dynamometer Test

38.3.9.1.                    The service brake effectiveness test is to be conducted with an initial brake temperature of between 50 and 95o C by conducting a series of stops from 80 km/h whilst maintaining constant brake actuator air pressure. The average torque from the time the specified air pressure is reached until the brake stops is divided by the 'Static Loaded Tyre Radius' specified by the tyre manufacturer to determine the retardation force. The complete test procedure requires seven stops to be made, each from the specified initial temperature, with the first run pressure being 138 kPa and increasing an additional 69 kPa for each of the remaining stops.

38.3.9.2.                    If a comparison of 'ERC' determined under clause 38.3.9.1 is to be made with that obtained under the road test described in clause 38.3.3 of this Rule, due allowance must be made for the effect that test speed may have on the result. A direct comparison of dynamometer data from an initial speed of 60 km/h or that derived by interpolating between a high and lower speed is acceptable.

38.3.10.                      Service Brake Fade Performance Dynamometer Test

38.3.10.1.                When mounted on an inertia dynamometer, each brake shall be capable of making 10 consecutive decelerations at an average rate of 2.75 m/s2 from 80 km/h to 24 km/h at equal intervals of 72 seconds, and shall be capable of decelerating to a stop from 32 km/h at an average deceleration rate of 4.25 m/s2 one