Division 4.3

The impactor must be aligned in such a way that the centre line of the propulsion system and the longitudinal axis of the impacting impactor are parallel to the longitudinal axis of the frontal protection system as mounted on the vehicle or test frame. The tolerances to these directions are ± 2 °. At the time of first contact the impactor centre line must be coincident with the selected impact position with a ± 10 mm tolerance (see Figure 10), and laterally with a tolerance of ± 10 mm.