# Commission Regulation (EU) 2017/1151 of 1 June 2017 supplementing Regulation (EC) No 715/2007 of the European Parliament and of the Council on type-approval of motor vehicles with respect to emissions from light passenger and commercial vehicles (Euro 5 and Euro 6) and on access to vehicle repair and maintenance information, amending Directive 2007/46/EC of the European Parliament and of the Council, Commission Regulation (EC) No 692/2008 and Commission Regulation (EU) No 1230/2012 and repealing Commission Regulation (EC) No 692/2008 (Text with EEA relevance), Division 6.7.2: Calculation of the aerodynamic force


The aerodynamic drag shall be calculated using the equation below. If the vehicle is equipped with velocity-dependent movable aerodynamic body parts, the corresponding (CD × Af) values shall be applied for the concerned reference speed points.
FAj=CD× Afj×ρ02×v2j3,62where:
FAjis the aerodynamic drag measured in the wind tunnel at reference speed j, N;
(CD × Af)jis the product of the drag coefficient and frontal area at a certain reference speed point j, where applicable, m2;
ρ0is the dry air density defined in paragraph 3.2.10. of this Annex, kg/m3;
vjis the reference speed j, km/h.

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Source: https://www.legislation.gov.uk/eur/2017/1151/annex/Sub/4/division/division/6./division/6.7./division/6.7.2. (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/4/division/division-6./division-6.7./division-6.7.2.
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.