Abstract: The invention relates to a position control device for a hydraulic actuator, such device comprising a hydraulic circuit comprising a pump supplying the two chambers of the actuator from a hydraulic tank or reserve by means of a servovalve, each outlet of the servovalve being connected to a chamber of the actuator by means of a non return valve. This such device is characterized in that at least one of the outlets of the servovalve connected a chamber of the actuator is also connected to the hydraulic tank by a calibrated nozzle upstream of the non return valve. The invention also relates to an interface plate for a servovalve allowing such a device to be implemented. The invention can namely be applied to the open loop and/or closed loop servo control of the laying of a gun barrel.

Abstract: The invention relates to a loading device for a shell in the cannon chamber of a weapon fitted with a screw breech incorporating a receiving tray onto which the shell is positioned, enabling it to be brought from a set up position to a loading position in which the shell is aligned with the cannon axis, ramming means and means to wedge the shell in the cannon operating successively, the ramming means and the wedging means being integral with the tray, said tray being connected to the slide of the weapon in an articulated manner in order to move the shell from the set up position to the loading position, the wedging means being connected in an articulated manner with respect to the tray such that after the shell has been rammed into place said wedging means partially engage in the tray substantially in the cannon axis, said tray being engaged in the weapon breech in abutment against a sealing cone of the cannon. The tray is fitted at its front end with protection means abutting against said sealing cone.