Mean radial (left), azimuthal (middle), and vertical (right) Galactocentric velocities of the FLAMES/GIRAFFE stars in the Gaia-ESO internal Data Release 2 (iDR2) as a function of their position in the Galaxy (in a cylindrical reference frame). For each panel, only the stars having errors less than 65 km s^-1 in that particular component of space velocity are selected. This results in 3162, 3667, 3243 targets, for V_R, V_φ, and V_Z, respectively. Mean values have been computed in bins of 0.4 kpc size, provided each position-bin contained at least 15 stars, resulting in an error in the mean velocity of 5 km s^-1 per bin.