Appendix 7
United Kingdom
Standard values
1.
Standard values for the declared air drag value Cd · Adeclared are defined according to Table 18. In case standard values shall be applied, no input data on air drag shall be provided to the simulation tool. In this case the standard values are allocated automatically by the simulation tool.
| Table 18 | |
| Standard values for Cd · Adeclared | |
| Vehicle group | Standard valueCd · Adeclared [m2] |
|---|---|
| 1 | 7,1 |
| 2 | 7,2 |
| 3 | 7,4 |
| 4 | 8,4 |
| 5 | 8,7 |
| 9 | 8,5 |
| 10 | 8,8 |
| 11 | 8,5 |
| 12 | 8,8 |
| 16 | 9,0 |
F12.
For vehicle configurations ‘rigid lorry + trailer’ the overall air drag value is calculated by the simulation tool by adding standard delta values for trailer influence as specified in Table 19 to the C d ·A declared value for the rigid lorry.
| Table 19 | |
| Standard delta air drag values for trailer influence | |
| Trailer | Standard delta air drag values for trailer influence [m2] |
|---|---|
| T1 | 1,3 |
| T2 | 1,5 |
3.
For EMS vehicle configurations the air drag value of the overall vehicle configuration is calculated by the simulation tool by adding the standard delta values for EMS influence as specified in Table 20 to the air drag value for the baseline vehicle configuration.
| Table 20 | |
| Standard delta Cd Acr (0) values for EMS influence | |
| EMS configuration | Standard delta air drag values for EMS influence [m2] |
|---|---|
| (Class 5 tractor + ST1) + T2 | 1,5 |
| (Class 9/11 truck) + dolly + ST 1 | 2,1 |
| (Class 10/12 tractor + ST1) + T2 | 1,5 |