Document ID: chunk:federal_register_of_legislation:F2021C00482:body:0:p19
Version: federal_register_of_legislation:F2021C00482
Segment Type: other
Provision Reference: 
Character Range: 52345–55222

I = dynamometer inertia, in kg.m2
M = mass supported by the wheel at the 'Maximum Loaded Test Mass 35/00', in kg
R = 'Static Loaded Tyre Radius' of the tyre, as specified by the tyre manufacturer, in metres.
35.6.1.2.                    The ambient temperature shall be between 23.8 and 37.8°C.
35.6.1.3.                    Ambient air shall be directed continuously over the brake drum or disc at a velocity of not more than 11.2 m/s.
35.6.1.4.                    The temperature of each brake shall be measured by a single plug-type thermocouple installed in the centre of the lining surface of the most heavily loaded shoe or pad. The thermocouple shall be outside any centre groove.
35.6.1.5.                    The rate of brake drum or disc rotation on a dynamometer corresponding to the rate of rotation on a vehicle at a given speed shall be calculated by assuming a tyre radius equal to the 'Static Loaded Tyre Radius' specified by the tyre manufacturer.
35.6.1.6.                    Burnishing, if conducted, shall consist of:
35.6.1.6.1.              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 157°C and not more than 197°C; and
35.6.1.6.2.              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 be not less than 232°C and not more than 288°C.
35.6.1.6.3.              After burnishing, the brakes shall be adjusted in accordance with the 'Manufacturers' recommendations.
35.6.1.7.                    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 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.
35.6.1.8.                    Speeds, decelerations and times specified in clause 35.6.2 shall be achieved within the following tolerance limits:
Speeds: + 5, - 1 km/h
Decelerations: + 0.25, - 0.25 m/s2
Times: + 5, - 5 seconds
35.6.2.                          Dynamometer Test Requirements
35.6.2.1.                    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 minute after the 10th deceleration. The series of decelerations shall be conducted as follows:
35.6.2.1.1.              with an initial brake temperature between 65oC and 94oC