Document ID: chunk:federal_register_of_legislation:F2021C00482:body:0:p13
Version: federal_register_of_legislation:F2021C00482
Segment Type: other
Provision Reference: 
Character Range: 35944–39065

= constants, dependent on test and category, see chart below
u = initial speed, in m/s
a = 'Average Deceleration', in m/s2
35.4.9.                          For all effectiveness, secondary brake and partial failure tests, no part of the vehicle shall move outside a straight lane not exceeding 3.7 metres in width, the vehicle being positioned at the approximate centre of the lane at the commencement of the deceleration.
35.4.10.                      Except in the case of the Parking Brake Test, the Service Brake Water Recovery Procedure and the Service Brake Water Effectiveness Test, each test procedure may be preceded by a series of stops or decelerations,
provided the temperature measured at the surface of the disc or drum does not exceed 100°C immediately prior to the commencement of the test.
35.4.11.                      Except as permitted by clause 35.5.2 brakes shall not be adjusted during testing. Automatic brake adjusters, if fitted, may be rendered inoperative prior to commencement of the optional Service Brake Burnishing Procedure. In cases where this option is exercised, adjusters shall remain inoperative for the duration of the test programme.
35.4.12.                      Except where clause 35.4.8 applies any vehicle speed specified in clause 35.3.3 shall be achieved within a tolerance of + 5, - 1 km/h.
35.5.                                PARTICULAR TEST CONDITIONS
35.5.1.                          Pre-test Instrumentation Check
35.5.1.1.                    The number of decelerations for the purpose of instrumentation checks shall not exceed 20. Such decelerations shall be conducted from a speed of not more than 40 km/h and any instantaneous deceleration shall not exceed 3 m/s2.
35.5.2.                          Service Brake Burnishing Procedure
35.5.2.1.                    Burnishing, if conducted, shall consist of any desired number of decelerations at the 'Manufacturer's' option.
35.5.2.2.                    On completion of the burnishing procedure, if conducted, the brake system may be adjusted in accordance with the 'Manufacturer's' recommendation.
35.5.3.                          Service Brake Lightly Laden Effectiveness Test. A series of test modes shall be conducted in the sequence as described in clause 35.3.3 (Item 3). The vehicle shall be deemed to satisfy the requirements of a mode if all the parameters of that mode are met on at least one test within a number of tests that shall not exceed 6.
35.5.4.                          Lightly Laden Secondary Brake Test
35.5.4.1.                    Where the secondary brake is not applied by the service brake control, the vehicle shall be decelerated using only the 'Secondary Brake System' and deemed to satisfy the requirements of this test, if all the parameters specified in clause 35.3.3 (Item 4) are met in at least one test within a number of tests that shall not exceed 6.
35.5.4.2.                    Where the secondary brake is applied by the service brake 'Control', the vehicle shall be decelerated using the 'Secondary Brake System' and deemed to satisfy the requirements of this test if all