Division 4.4
United Kingdom
The impactor shall be aligned in such a way that the centre line of the propulsion system and the longitudinal axis of the impactor are parallel to the longitudinal plane 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 shall be coincident with the selected impact position with a ±10 mm tolerance (see Figure 3), and laterally with a tolerance of ±10 mm.