Document ID: chunk:federal_register_of_legislation:F2025C00113:front:0:p20
Version: federal_register_of_legislation:F2025C00113
Segment Type: other
Provision Reference: 
Character Range: 56468–59630

the wheels (N) to which the 'Parking Brake System 38/...' is fitted and dividing by [98.1 x 'Aggregate Trailer Mass' (tonnes)].
     2.                                 The braking force at each 'Axle' must be calculated according to:
 where:
 F is the tangential force at the braked wheels on the 'Axle' concerned
 A is the input to the park brake actuator in units of 'E'
 T is the 'Brakes' output torque per 1.0 'E' for the 'Park Brake System'
 R is the rolling radius of the tyre fitted to the wheel.
 1.                                 The provisions of clause 19.2.1, 19.2.2 & 19.2.3 must apply.
 2.                                 When 'Emergency Brake System' performance data is used to demonstrate compliance of the 'Parking Brake System 38/...', the geometry of the 'Brakes' must be such that brake effectiveness will be not less in the reverse direction.

 1.                                       RESPONSE AND RELEASE TIMEs FOR TRAILERS FITTED WITH 'APPROVED' 'CONTROL SYSTEMs'
     1.                                 A 'Service Brake System' may be taken as complying with the requirements of clause 7.1.4 and 7.1.5 of this rule, if the 'Service Brake System' is installed in a manner identical to that prescribed in the documentation describing the 'Approved' 'Control System' used, except as allowed in clause 21.2.
     2.                                 Actuator volumes at full 'Foundation Brake' stroke and line lengths may be reduced and actuator volumes at the point when the 'Foundation Brake' friction materials cease to contact each other may be increased from those specified in the 'Approved' 'Control System' documentation, but other devices, fittings and dimensions may not be changed.

 2.                                       SPECIFICATION OF BRAKE SYSTEM COMPONENTS
     1.                                 Sub-assemblies of 'Brake System' components may be 'Approved' by the 'Administrator' as part of the 'Brake System' approval process where information has been supplied in accordance with the requirements of the appropriate sub-paragraphs of clause 22.
     2.                                 'Control System'
         1.                           The 'Control System' must be characterised by determining the 'Control System' ratio at not less than five points in the range of 'Control Signal' inputs at 0.2 'E' to 1.0 'E'.  These points must be equally spaced except where the relationship within that range is non-linear, in which case the points must include each critical point.
             1.                     The 'Control System' ratio for each axle is the Output Signal level as a percentage of 'Control Signal' level.
             2.                     The input must be taken at the trailer coupling.
             3.                     The output must be taken at the outlet end of the line to the service brake actuator.
         2.                           The input signal strength must be the final value of the applied signal and must be applied to the 'Control System' such that it rises from zero to 65 per cent of the final value in not more than 0.22 second.  In the case of air 'Brake System's' the