Test apparatus
1.2.1. This apparatus shall consist of a pendulum whose pivot is supported by ballbearings and whose reduced mass (1) at its centre of percussion is 6 78 kg. The lower extremity of the pendulum shall consist of a rigid headform 165 mm in diameter whose centre is identical with the centre of percussion of the pendulum.
Control devices for regulating the braking force, which react to the inclination in the direction of travel (pendulum, spring-mass-system, liquid-inertia-switch) shall be attached to the chassis if the trailer has more than one axle and a vertically adjustable towing device.
