Division 4.6

The bottom of the impactor shall be 25 mm above the ground reference level at the time of first contact with the bumper (see Figure 2), with a ±10 mm tolerance.

F1In case the vehicle is tested in accordance with Section 2.1(a) of Annex I to Regulation (EC) No 78/2009, the bottom of the impactor may also be at the ground reference level at the time of first contact with the bumper, with a ± 10 mm tolerance.

When setting the height of the propulsion system, an allowance shall be made for the influence of gravity during the period of free flight of the impactor.

At the time of first contact the impactor shall have the intended orientation about its vertical axis, for the correct operation of its knee joint, with a tolerance of ± 5° (see Figure 1).