Abstract: The invention relates to an architecture for a hydraulic system for operating the landing gear of an aircraft including at least one pressure source and at least one hydraulic return, the system having a hydraulic circuit comprising a first hydraulic line that, when pressurized, causes the landing gear to be lowered, and a second hydraulic line that, when pressurized, causes the landing gear to be raised, said lines being selectively pressurized by means of a hydraulic distribution member comprising at least an isolation valve and a selector for putting one of the lines into communication with pressure and the other line into communication with return.

Abstract: The present invention describes a method of CVI densification in which particular arrangements and mixtures of undensified porous substrates and partially densified porous substrates are arranged in particular ways in order to use the thermal characteristics of the partially densified porous substrates to better distribute heat throughout a CVI furnace and thereby improve densification.

Abstract: The invention is a method of treating the surface of a steel mechanical part by the successive steps of subjecting the part to finishing to lower its surface roughness; cleaning; subjecting the cleaned part to a tribo finishing step to lower surface roughness and increase wettability; and subjecting the part to ambient temperature high speed projection of tungsten disulfide platelet particles to form a dense, self-lubricating deposit on the part.

Abstract: The invention relates to a controlled-friction device comprising first and second elements (1, 2) mounted to move relative to each other in a sliding direction, the device of the invention being characterized in that it includes first and second friction members (5, 5) arranged symmetrically between the two elements in order to rub selectively against the second element, each of the friction members being urged towards a wedging position by a presser member (6), the first friction member being arranged, in a first direction of relative movement between the two elements along the travel direction, to tend to prevent relative movement between the two elements, and in a second direction to exert on the two elements an opposing friction force that depends on a stress applied against the first wedge member by the presser member; while the second friction member is arranged in the second direction to tend to prevent relative movement of the two elements, and in the first direction to exert on the two elements an op

Abstract: The invention relates to a method of fabricating a connecting rod, the method including: fabricating a body (1) of metallic material reinforced by long fibers (5) oriented mainly along a longitudinal axis (X) of the body; fabricating an endpiece out of a metallic material reinforced by short fibers; and welding the endpiece to the end of the body using a friction-mixing welding technique.