Abstract: A hydraulic brake system for activating the wheel brakes of an aircraft landing gear assembly includes a hydraulic fluid supply line and an associated return line. There is a valve which separates a source of hydraulic fluid from a portion of the return line and an associated leak path associated with the valve that in use maintains the pressure and/or volume of hydraulic fluid in the portion of the return line above a minimum acceptable level. The leak path may be provided by a hole drilled in a part (e.g. the poppet) of a non-return check valve.

Abstract: An aircraft is disclosed having a landing gear with a main support supporting one or more wheels. The landing gear has at least two sidestays by which landing gear loads can be propagated from the landing gear to the body of the aircraft. The sidestays are attached at one end to a rotatable yoke via joints which allow relative movement between the sidestays and the yoke so that the yoke can rotate about a yoke axis. Rotation of the yoke about the yoke axis, permitted by the joints, can help distribute loads between the two sidestays and/or combat negative effects resulting from an unfavourable tolerance stack during assembly, for example.

Abstract: A protective lining which includes a self-curing potting sealant compound. The lining can be used for an aircraft part, such as a tank wall liner which can be manufactured in-situ by casting the sealant into a prepared mold that is formed at least at the bottom side by the part to be protected by the tank wall liner. Specifically, for fuel tanks, the bottom portion forms the bottom side of the mold, whereas the ribs and stringers form a circumferential wall of the mold that prevents flowing of the potting sealant compound into neighboring molds.

Abstract: An aircraft having an engine, a cabin, an air conditioning system collecting the hot air from the engine, so as to treat the hot air, regulate a temperature of the hot air and send the hot air towards the cabin via a main line, an air line channeling the air leaving the cabin, and an arrangement for cooling the engine using the air thus drawn off by the air line. By drawing off the air at the outlet of the cabin, the performance of the engine is improved and the fuel consumption is reduced.

Abstract: A propulsion assembly having a combustion chamber and a turbine, a nacelle with a front cowl facing the turbine, with a window passing through it, and a rear cowl to the rear of the turbine, a fire barrier between the front cowl and the rear cowl, a dihydrogen supply pipe meandering from the inside of the rear cowl, then in a sealed manner through the fire barrier, then through the window as far as the combustion chamber, wherein the supply pipe has an intermediate section between the fire barrier and the window, and a plate fastened in a sealed manner to the intermediate section and fastened in a sealed manner to the front cowl around the window.

Abstract: A flap system for an aircraft comprises a wing structure, a trailing-edge and an attachment unit for movably coupling the trailing-edge movable to the wing structure. The attachment unit comprises an attachment mechanism and a cover element which at least partly encloses the attachment mechanism. The attachment unit comprises a drive element which is configured to move the cover element along an aerodynamic outer surface of a skin section of the wing structure between a first position and a second position, wherein the movement of the cover element along the aerodynamic outer surface is defined by a translational movement of the cover element relative to the skin section.

Abstract: An assembly including a wing with a pressure-side panel and a suction-side panel through which two bores pass, an engine pylon including a blade with three bores and two fastening lugs, each of which has a sixth bore, two first shackles fastened between the blade and the suction-side panel, two second shackles fastened between the blade and the suction-side panel and two fittings, which are fastened beneath the pressure-side panel and each have a female clevis for housing a fastening lug therein.

Abstract: An engine pylon has a structure for fastening an aircraft engine beneath a wing and has two lateral faces. The structure has a tunnel laterally passing through it, between and through the lateral faces, and the engine pylon has a spreader housed in the tunnel and fastened in an articulated manner to each lateral face. A first end of the spreader has a first bore. A second end of the spreader has two second bores each forming a connection point with the engine. A rod is fastened in an articulated manner to the first bore and has two third bores each forming a connection point with the engine. Such an engine pylon has the ability to attach the engine, with reduced vertical bulk and with less drag.

Abstract: A propulsion assembly for an aircraft, having a turbomachine, a pylon, and a device for reacting thrust forces having a main fitting, a spreader pivoting on the main fitting and having an opening, two rods articulated to the turbomachine and to the spreader, a secondary fitting fastened beneath the pylon and having a secondary female clevis constituted of two secondary arms passed through by holes of oblong shape and aligned along a secondary axis (R2), wherein the spreader is housed in the secondary female clevis of the secondary fitting, wherein the opening is coaxial with the secondary axis (R2), and a backup connection pin inserted with a tight fit into the opening and with clearance into the holes. Also an aircraft with such a propulsion assembly.

Abstract: An acoustic panel including first and second cellular structures, the first cellular structure including a set-back portion to form a recess dimensioned to accommodate the second cellular structure such that first faces of the first and second cellular structures, in contact with a first, acoustically resistive layer, are coplanar and that first edge faces of the first and second cellular structures are coplanar when the second edge face of the second cellular structure is in contact with the set-back portion. By virtue of the set-back portion, the first and second cellular structures are positioned correctly with respect to one another, thus contributing to an optimization of the acoustic treatment.

Abstract: A method and a system for stripping a part which includes visualizing a zone to be stripped on a screen using a camera, aligning a center of the zone to be stripped with a pattern overlaid on the screen, defining a stripping dimension around the center of the zone to be stripped and controlling a laser source to have the laser source strip the zone to be stripped within that dimension. Such a method makes it possible to correctly visualize the positioning of the laser source with respect to the zone to be stripped before the stripping operation.

Abstract: A temporary pintle support which can attach between upper prongs of a landing gear, and which is arranged to hold pintle pins prior to installation of the landing gear assembly at an aircraft. The pintle support is attached at the landing gear to align the pintle pins with their respective attachment bearings on each of the prongs. The pintle support may be removed once the pintle pins are fully inserted.

Abstract: A propulsion assembly for an aircraft having a chassis in the form of a cage with bars, a turbine, a dihydrogen supply pipe winding inside a nacelle as far as the rear of the turbine, with a radial step towards the outside of the nacelle, a rail with a radial step towards the outside of the nacelle, a bypass pipe connected between the two radial steps outside the nacelle, and a protection plate fastened to the bars, and an absorber between the protection plate and the related bar.

Abstract: A variable fairing for covering a hydrogen duct system installation on the outside of an aircraft part, wherein the fairing comprises at least one fairing body to be mounted on the aircraft part, an air inlet and an air outlet and at least one movable closure mechanism configured to open and close a top portion of the fairing.

Abstract: An engine protection cover device for airtight sealing an engine of an aircraft or spacecraft includes an air intake cover being inflatable to correspond to the internal dimension of the air intake for airtight sealing the same, wherein the air intake cover includes an airtight sealable access opening for attaching or passing through an air dryer for drying the air inside the engine. An aircraft or spacecraft is disclosed with such an engine protection cover device.

Abstract: A method for a soft-start strategy of a fuel cell includes: providing a fuel cell, wherein the fuel cell is connected to load, providing a capacitor, wherein the capacitor is connected in between the fuel cell and the load, wherein the fuel cell includes an anode and a cathode and the anode and the cathode are in a preconditioned state, the method further including filling the cathode with a mass rate derived from a proportion of an input gas and a used gas, and a predefined current, such that the predefined current does not exceed a maximum current during a precharge of the capacitor.

Abstract: An aircraft wing including a flap system mounted at a leading or trailing edge of the wing and includes at least two movable flap devices spaced apart in a spanwise direction Y from each other, each movable flap device supported by at least one support station and driven about a hinge axis by at least one drive system. The flap system includes a synchronizing torque element connected to the movable flap devices, wherein the synchronizing torque element is configured to transmit a torque between the movable flap devices to actuate a rotational movement of the movable flap devices, and wherein the synchronizing torque element is positioned between the movable flap devices and around an adjacent system or structural component that is also positioned between the movable flap devices.

Abstract: A fastening system to attach a fixture to a monument installed in a passenger cabin including a wall portion of the monument having at least one first fastening element; and a frame having at least one second fastening element and which is configured to cover the fixture, at least in part, in a fastened state. The first and second fastening elements are configured to engage with one another and be movable relative to one another in a pre-assembled state, and to fix one another in the fastened state. The fastened state can be produced in that, in the pre-assembled state, the frame is moved relative to the wall portion in a fastening direction extending at least substantially parallel to a main extension plane of the wall portion. A method for attaching a fixture to a monument provided for installation in a passenger cabin via a fastening system is provided.

Abstract: An aircraft fuselage door with an internal and external panel, and an aircraft fuselage part with the door. The door includes a movable internal panel to be subjected to pressurization and an aerodynamic external panel, the external panel being on an external face of the internal panel by covering the surface of the external face and elastically linked to the internal panel to form an internal free space between them, the internal panel being movable relative to the external panel. The external panel includes a centering piece to ensure a self-centering function of the door allowing the internal panel to move independently with regard to the external panel when the door is in a closed position so a clearance between the periphery of the outer panel and the fuselage can be reduced, thereby reducing drag at the outer surface of the door and improving the aerodynamic performance of the aircraft.

Abstract: An aircraft fuselage is configured to receive two tanks designed to contain liquid hydrogen. The fuselage includes a first section for a cockpit, a second section for a passenger cabin and a third section (T3) distinct from the first section (T1) and from the second section (T2). The third section (T3) includes two housings each to house a tank. The two housings are arranged symmetrically with respect to a vertical plane of symmetry (P1). This arrangement of the tanks in a section distinct from the other sections allows them to be located as close as possible to the motors that they have to supply.