a shaft extending along a longitudinal axis (X) of the turbine engine, blades being mounted on the shaft,

a connection mechanism connected to the blades of the shaft;

a control system acting on the connection mechanism and comprising a stationary body secured to the shaft and a movable body in translation along the longitudinal axis (X) with respect to said stationary body and separating the stationary body into two chambers of variable volume, the movable body being connected to the connection mechanism;

a supply means of the control system configured to supply the chambers with pressurised fluid and to be connected to a main supply source of the turbine engine with pressurised fluid arranged in a stationary reference frame of the turbine engine,

the supply means being configured to be coupled to a fluid transfer bearing configured to transfer the pressurised fluid from the main supply source towards each of the chambers of the control system arranged in a rotating reference frame of the turbine engine via the supply means;

the pitch setting device being wherein it comprises an auxiliary supply circuit with pressurised fluid arranged in the rotating reference frame, connected to the supply means and configured to receive pressurised fluid from the main supply source and in that the supply means is configured to:

in normal operation, allows the passage of pressurised fluid from the main supply source towards the chambers of the control system so as to adjust the pitch setting of the blades and to allow the passage of pressurised fluid from the main supply source towards the auxiliary supply circuit, and

in the event of a break in the supply of pressurised fluid to the chambers from the main supply source, allows the passage of pressurised fluid from the auxiliary supply circuit towards the chambers of the control system so as to cause the blades to feather, and

wherein the supply means comprises a sliding valve arranged in the rotating reference frame and controlled by a hydraulic control and the sliding valve being connected to the fluid transfer bearing, to the auxiliary supply circuit and to at least one of the chambers of the control system, the sliding valve being able to occupy at least two positions:

in a first position (A), the sliding valve allows the passage of the fluid from the main supply source towards the or each chamber connected to the sliding valve so as to adjust the setting of the pitch of the blades and blocks the passage of the fluid from the auxiliary supply circuit towards the or each chamber connected to the sliding valve; and

in a second position (B), the sliding valve blocks the passage of the fluid from the main supply source with fluid towards the or each chamber connected to the sliding valve and allows the passage of the fluid from the auxiliary supply circuit towards at least one chamber connected to the sliding valve so as to cause the blades to feather.