Document ID: chunk:federal_register_of_legislation:F2024C00148:reg:9:p5
Version: federal_register_of_legislation:F2024C00148
Segment Type: reg
Provision Reference: reg 9 (pt 5/13)
Character Range: 79514–82375

through the lowest mirror attachments or any other point forward of this plane if this configuration produces a greater overall width.

              In such cases, a description specifying that the device for indirect vision shall be mounted so as to conform to the above-mentioned conditions for the positioning of its attachments on the vehicle shall be provided.

              Where advantage is taken of this derogation, the arm shall be indelibly marked with the symbol

              and the type approval certificate shall be endorsed to this effect.

              6.3.2. Impact test

              The test according to this paragraph is not to be carried out for devices integrated in the bodywork of the vehicle and providing a frontal deflecting area of an angle not more than 45° measured in relation to the longitudinal median plane of the vehicle, or devices not protruding more than 100 mm measured beyond the circumscribing bodywork of the vehicle according to Regulation No. 26.

              6.3.2.1. Description of the test rig

              6.3.2.1.1. The test rig consists of a pendulum capable of swinging about two horizontal axes at right angles to each other, one of which is perpendicular to the plane containing the "release" trajectory of the pendulum.

              The end of the pendulum comprises a hammer formed by a rigid sphere with a diameter of 165 ± 1 mm having a 5 mm thick rubber covering of Shore A hardness 50.

              A device is provided which permits determination of the maximum angle assumed by the arm in the plane of release.

              A support firmly fixed to the structure of the pendulum serves to hold the specimens in compliance with the impact requirements specified in paragraph 6.1.3.2.2.6. below.

              Figure 1 below gives the dimensions (in mm) of the test rig and the special design specifications:

       Figure 1

              6.3.2.1.2. The centre of percussion of the pendulum coincides with the centre of the sphere, which forms the hammer. It is at a distance l from the axis of oscillation in the release plane, which is equal to 1 m ± 5 mm. The reduced mass of the pendulum is mo = 6.8 ± 0.05 kilograms. The relationship of mo to the total mass m of the pendulum and to the distance d between the centre of gravity of the pendulum and its axis of rotation is expressed in the equation:

              6.3.2.2. Description of the test

              6.3.2.2.1. The procedure used to clamp the device for indirect vision to the support shall be that recommended by the manufacturer of the device or, where appropriate, by the vehicle manufacturer.

              6.3.2.2.2. Positioning of the device for indirect vision for the test

              6.3.2.2.2.1. Devices for indirect vision shall be positioned on the pendulum impact rig in such a way that the axes