# Commission Decision of 23 December 2003 on the technical prescriptions for the implementation of Article 3 of Directive 2003/102/EC of the European Parliament and of the Council relating to the protection of pedestrians and other vulnerable road users before and in the event of a collision with a motor vehicle and amending Directive 70/156/EEC (notified under document number C(2003) 5041) (Text with EEA relevance) (2004/90/EC), Division 3.4.2.7

Extent: E+W+S+N.I.

The total mass of the upper legform impactor includes those propulsion and guidance components which are effectively part of the impactor during the impact, including the extra weights.
Calculate the value of the upper legform impactor mass from:
M = 2E / V 2
where
M Mass [kg]
E Impact Energy [J]
V Velocity [m/s].
The required velocity shall be the value derived in point 3.4.2.6 and the energy shall be derived from Figure 8 with reference to the values of bonnet leading edge height and bumper lead determined in point 3.4.2.5.
The upper legform impactor mass may be adjusted from the calculated value by up to ± 10 %, provided the required impact velocity is also changed using the above formula to maintain the same impactor kinetic energy.

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Source: https://www.legislation.gov.uk/eudn/2004/90/annex/chapter/IV/division/3/division/3.4/division/3.4.2/division/3.4.2.7 (the official version)
Page: https://openlegislation.uk/eu-decision-2004-90/annex/chapter-IV/division-3/division-3.4/division-3.4.2/division-3.4.2.7
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.