{
  "url": "https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/4/division/division-4./division-4.3./division-4.3.2./division-4.3.2.5.",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/4/division/division-4./division-4.3./division-4.3.2./division-4.3.2.5..json",
  "legislation": "eur/2017/1151",
  "legislation_title": "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)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2017-1151",
  "path": "annex/Sub/4/division/division/4./division/4.3./division/4.3.2./division/4.3.2.5.",
  "kind": "division",
  "number": "4.3.2.5",
  "heading": "Determination of the equation of motion",
  "text": "Symbols used in the on-board anemometer equations of motion are listed in Table A4/5.\nTable A4/5\nSymbols used in the on-board anemometer equations of motion\nSymbol\nUnits\nDescription\nAf\nm2\nfrontal area of the vehicle\na0 … an\ndegrees-1\nAerodynamic drag coefficients as a function of yaw angle\nAm\nN\nmechanical drag coefficient\nBm\nN/(km/h)\nmechanical drag coefficient\nCm\nN/(km/h)2\nmechanical drag coefficient\nCD(Y)\naerodynamic drag coefficient at yaw angle Y\nD\nN\ndrag\nDaero\nN\naerodynamic drag\nDf\nN\nfront axle drag (including driveline)\nDgrav\nN\ngravitational drag\nDmech\nN\nmechanical drag\nDr\nN\nrear axle drag (including driveline)\nDtyre\nN\ntyre rolling resistance\n(dh/ds)\n—\nsine of the slope of the track in the direction of travel (+ indicates ascending)\n(dv/dt)\nm/s2\nacceleration\ng\nm/s2\ngravitational constant\nmav\nkg\narithmetic average mass of the test vehicle before and after road load determination\nme\nkg\neffective vehicle inertia including rotating components\nρ\nkg/m3\nair density\nt\ns\ntime\nT\nK\nTemperature\nv\nkm/h\nvehicle speed\nvr\nkm/h\nrelative wind speed\nY\ndegrees\nyaw angle of apparent wind relative to direction of vehicle travel",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Substituted by Commission Regulation (EU) 2018/1832 of 5 November 2018 amending Directive 2007/46/EC of the European Parliament and of the Council, Commission Regulation (EC) No 692/2008 and Commission Regulation (EU) 2017/1151 for the purpose of improving the emission type approval tests and procedures for light passenger and commercial vehicles, including those for in-service conformity and real-driving emissions and introducing devices for monitoring the consumption of fuel and electric energy (Text with EEA relevance)."
    },
    {
      "type": "F",
      "label": "F2",
      "text": "Inserted by Commission Regulation (EU) 2018/1832 of 5 November 2018 amending Directive 2007/46/EC of the European Parliament and of the Council, Commission Regulation (EC) No 692/2008 and Commission Regulation (EU) 2017/1151 for the purpose of improving the emission type approval tests and procedures for light passenger and commercial vehicles, including those for in-service conformity and real-driving emissions and introducing devices for monitoring the consumption of fuel and electric energy (Text with EEA relevance)."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2017/1151/annex/Sub/4/division/division/4./division/4.3./division/4.3.2./division/4.3.2.5.",
    "retrieved_at": "2026-11-01T14:44:48.753743+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}