Document ID: chunk:federal_register_of_legislation:F2006L03060:body:0:p10
Version: federal_register_of_legislation:F2006L03060
Segment Type: other
Provision Reference: 
Character Range: 27556–30661

it is shown that an alternative value should be used.

K3 is the effective time delay of 0.32 seconds referred to in clause 38.3.1.3 for air 'Brake System's' and this value should be used unless a more appropriate value can be demonstrated.

38.3.3.2.6.              The computed 'Established Retardation Coefficients' determined from clause 38.3.3.2.5 shall comply with clause 38.2.2.6 (service effectiveness).

38.3.3.2.7.              No part of the 'Brake System' shall exceed 100oC immediately prior to the commencement of a brake test sequence.

38.3.3.3.                    No trailer wheels shall remain locked, except below approximately 10 km/h, during completion of the braking tests required by the sections of clause 38.3.3.2.

38.3.3.4.                    In the case of 'Dog Trailers' at least one front 'Axle' shall skid before at least one rear 'Axle' at an 'ERC' greater than:

(a)  0.3 in the case of two 'Axle' 'Dog Trailers';

(b) 0.15 in the case of 'Dog Trailers' with three or more 'Axles'.

38.3.3.4.1.              The test shall be conducted generally in accordance with clause 38.3.3.2 (service brake effectiveness) with the 'Control Signal' and surface type selected to demonstrate the requirement of clause 38.3.3.4 above.

The initial speed requirement of clause 38.3.3.2.1 does not apply.

38.3.3.5.                    Computer simulation of the requirements of clause 38.3.3 is allowed where the simulation is sufficiently sophisticated and has been approved by the 'Administrator' on the basis of an adequate back to back comparison with physical test results.

38.3.4.                          Service Brake Fade Effectiveness

38.3.4.1.                    Each 'Unique' trailer 'Service Brake System' shall be shown by either test in accordance with clause 38.3.2 (general test conditions) and clause 38.3.4.2 (service brake fade effectiveness test) or by the calculation based on data for 'Approved' components in clause 38.4.2 (service brake fade calculation), to meet the requirements of clause 38.3.4.2.1 (degree of fade) and clause 38.2.2.5 (distribution of fade resistance).

38.3.4.2.                    Service Brake Fade Effectiveness Test

38.3.4.2.1.              The 'Service Brake System' shall, on the next application after not less than 20 successive applications, each not more than 60 seconds after the preceding one, of the trailer 'Brakes' from an initial speed of 60 km/h to a final speed as calculated by clause 38.3.4.2.2, achieve a calculated 'Established Retardation Coefficient', when tested in accordance with clause 38.3.3.2, (service brake effectiveness test), of not less than 60 per cent of the value obtained for the service brake effectiveness test required by clause 38.3.3.2 nor less than 80 per cent of the value specified by the lower bound of Figure 1.

38.3.4.2.2.              The final speed to which the trailer has to be successively braked as part of the brake fade conditioning procedure shall be determined from the equation

where:

V1 is the initial speed in km/h

V2 is the final speed in km/h

Masses