Drag Coefficient (CD)

Force (N) for 1m² of frontal area at an air speed of 1km/h.

Typical values FH/FM

                                                    Single truck      Truck and

                                                  and semitrailer      trailer

No air-flow equipment.......Cd =         0.7                  0.8

With air flow equipment.....Cd =        0.5                  0.7