The European Union Directive 2003/102/EC, with the associated technical prescriptions in EC Decision 2004/90/EC, introduces pedestrian protection in two stages. The first stage requires pedestrian protection to be provided in new car designs using an adaptation of the EEVC WG17 test methods that is somewhat less demanding. Following a feasibility assessment study, a higher level of pedestrian protection could be provided by a second phase. The feasibility study, carried out by TRL, was completed in June 2004. One proposal in the TRL study, made to improve the feasibility of providing protection for the head and to increase compatibility between the test procedures used in Europe and elsewhere, was to reduce the mass of the adult headform impactor from 4.8 kg to 4.5 kg. The objective of the current study was to assess the FTSS 4.5 kg headform impactor’s physical and dynamic properties. The results have been used to propose an impactor specification and dynamic certification corridor for an EEVC WG17 4.5 kg headform. Even if EEVC WG17 chooses not to adopt this headform, the proposed specification could still be adopted by the EC and included in amendments to the Decision.

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