Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:6600:p22
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 6600 (pt 22/28)
Character Range: 853416–856326

2 consecutive seconds;
                  (c)  The arithmetic average of the vector component of the wind speed across the test road shall be less than 2 m/s.
              The wind correction shall be calculated according to paragraph 4.5.3. of this annex.
              4.1.1.1.2. Permissible wind conditions when using on-board anemometry
              For testing with an on-board anemometer, a device as described in paragraph 4.3.2. of this annex shall be used.
              The wind conditions during run pairs shall meet all of the following criteria:
                  (a) The arithmetic average of the wind speed shall be less than 7 m/s;
                  (b) Peak wind speeds shall not exceed 10 m/s for more than 2 consecutive seconds;
                  (c) The arithmetic average of the vector component of the wind speed across the test road shall be less than 4 m/s.
              4.1.1.2. Atmospheric temperature
              The atmospheric temperature should be within the range of 5 °C up to and including 40 °C.
              At the option of the manufacturer, coastdowns may be performed between 1 °C and 5 °C.
              If the difference between the highest and the lowest measured temperature during the coastdown test is more than 5 °C, the temperature correction shall be applied separately for each run with the arithmetic average of the ambient temperature of that run.
              In that case, the values of the road load coefficients f0, f1 and f2 shall be determined and corrected for each run pair. The final set of f0, f1 and f2 values shall be the arithmetic average of the individually corrected coefficients f0, f1 and f2 respectively.
              4.1.2. Test road
              The road surface shall be flat, even, clean, dry and free of obstacles or wind barriers that might impede the measurement of the road load, and its texture and composition shall be representative of current urban and highway road surfaces, i.e. no airstrip-specific surface. The longitudinal slope of the test road shall not exceed 1 per cent. The local slope between any points 3 metres apart shall not deviate more than 0.5 per cent from this longitudinal slope. If tests in opposite directions cannot be performed at the same part of the test track (e.g. on an oval test track with an obligatory driving direction), the sum of the longitudinal slopes of the parallel test track segments shall be between 0 and an upward slope of 0.1 per cent. The maximum camber of the test road shall be 1.5 per cent.
              4.2. Preparation
              4.2.1. Test vehicle
              Each test vehicle shall conform in all its components with the production series, (e.g. side mirrors shall be same position as during normal vehicle operation, body gaps shall not be sealed), or, if the vehicle is different from the production vehicle, a full description shall be recorded.
4.2.1.1.