Pantograph comprising: - a chassis to which a reference frame is attached, the reference frame comprising a longitudinal direction, a vertical direction and a transverse direction, the longitudinal direction and the vertical direction together defining a vertical plane, - a bow collector intended to be in contact with a catenary in order to collect a power supply current passing through the catenary, - an articulated arm connecting the bow collector to the chassis and designed to deploy vertically in order to move, in the vertical plane, the bow collector with respect to the chassis, this arm comprising a main upper rod and an auxiliary upper rod, - an aileron assembly comprising at least one aileron (404, 406) forming, in the vertical plane, an angle (α404, α406) with the longitudinal direction, - a device for orienting the aileron (404, 406) designed to vary the angle (α404, α406) of the aileron (404, 406) with the longitudinal direction according to the deployment of the articulated arm, -- this orientation device comprising means (504, 506; 526, 527) for controlling the variation in the angle of the aileron, these control means comprising at least a first control member (504, 506), articulated both on the main upper rod and on the auxiliary upper rod of the arm the pantograph being characterised in that the means for controlling the variation in the angle of the aileron further comprise at least a second control member (526, 527), rigidly connected to the main upper rod, this orientation device being adapted in order for - over a first range of deployment of the articulated arm in which the bow collector moves between a low position and an intermediate position, the first control member (504, 506) is capable of controlling the variation in the angle (α404, α406) of the aileron independently of the second control member (526, 527), in such a way as to confer a first profile of variation in angle on the aileron over this first range; - over a second range of deployment of the articulated arm in which the bow collector moves between the intermediate position and a high position, the second control member (526, 527) is capable of controlling the variation in the angle (α404, α406) of the aileron, in such a way as to confer a second profile of variation in angle on the aileron over this second range. - a chassis to which a reference frame is attached, the reference frame comprising a longitudinal direction, a vertical direction and a transverse direction, the longitudinal direction and the vertical direction together defining a vertical plane, - a bow collector intended to be in contact with a catenary in order to collect a power supply current passing through the catenary, - an articulated arm connecting the bow collector to the chassis and designed to deploy vertically in order to move, in the vertical plane, the bow collector with respect to the chassis, this arm comprising a main upper rod and an auxiliary upper rod, - an aileron assembly comprising at least one aileron (404, 406) forming, in the vertical plane, an angle (α404, α406) with the longitudinal direction, - a device for orienting the aileron (404, 406) designed to vary the angle (α404, α406) of the aileron (404, 406) with the longitudinal direction according to the deployment of the articulated arm, -- this orientation device comprising means (504, 506; 526, 527) for controlling the variation in the angle of the aileron, these control means comprising at least a first control member (504, 506), articulated both on the main upper rod and on the auxiliary upper rod of the arm the pantograph being characterised in that the means for controlling the variation in the angle of the aileron further comprise at least a second control member (526, 527), rigidly connected to the main upper rod, this orientation device being adapted in order for -- this orientation device comprising means (504, 506; 526, 527) for controlling the variation in the angle of the aileron, these control means comprising at least a first control member (504, 506), articulated both on the main upper rod and on the auxiliary upper rod of the arm the pantograph being characterised in that the means for controlling the variation in the angle of the aileron further comprise at least a second control member (526, 527), rigidly connected to the main upper rod, this orientation device being adapted in order for - over a first range of deployment of the articulated arm in which the bow collector moves between a low position and an intermediate position, the first control member (504, 506) is capable of controlling the variation in the angle (α404, α406) of the aileron independently of the second control member (526, 527), in such a way as to confer a first profile of variation in angle on the aileron over this first range; - over a second range of deployment of the articulated arm in which the bow collector moves between the intermediate position and a high position, the second control member (526, 527) is capable of controlling the variation in the angle (α404, α406) of the aileron, in such a way as to confer a second profile of variation in angle on the aileron over this second range.