Abstract: An abutment mechanism for a lift assembly of an aircraft. The abutment mechanism comprises a single rigid link having variable travel, the link comprising a rod and a body, the rod being movable in translation relative to the body along the longitudinal direction through said travel, the abutment mechanism including a movement member for adjusting an amplitude of the travel as a function of at least one predetermined parameter, the link having two endpieces suitable for being hinged respectively to a said lift assembly and to a said drive system.

Abstract: A bottom abutment device for a rotor having a plurality of lift assemblies. The bottom abutment device comprises at least one abutment track per lift assembly. The bottom abutment device comprises a plate with a ring and one branch per lift assembly. The bottom abutment device has a plurality of supports, each support fastenable to a rotary member of the rotor, each support extending in part in an opening in a branch, the supports giving the plate a restricted degree of freedom to move in translation, the supports giving the plate at least one restricted degree of freedom to move in rotation about the axis of symmetry.

Abstract: A rotorcraft rotor having each of its blades fitted with a lead/lag damper. A connection device between the blade root of a blade under consideration and a lead/lag damper comprises a rod passing through a laminated ball joint secured to a distal endpiece of the lead/lag damper. The rod extends in the general plane in which the blade extends, being prevented from moving firstly in rotation by being embedded in the blade root and secondly in translation along the general transversely-extending direction of the blade by being pinned to a U-shaped yoke fastened to the blade root.

Abstract: A rotor carrying a plurality of lift assemblies, each having a retention and mobility member. An abutment mechanism of a lift assembly includes an abutment track arranged on the retention and mobility member and a single cylindrical abutment that is movable in pivoting about a movement axis, said abutment extending over a height in elevation and also over a length and over a width. The length is greater than said width, and said height is greater than said length. A fly-weight is secured to pivot with said abutment, and a return spring exerts a force on said fly-weight.

Abstract: A set of swashplates having a non-rotary swashplate and a rotary swashplate. The set includes drive means constraining the rotary swashplate and the rotor mast in rotation about the axis of rotation. The drive means are provided with a drive arm driving the rotary swashplate in rotation about the axis of rotation by plane connection means including a fork, the drive arm extending in elevation from a first end to a second end that is fastened to the rotor mast, the first portion being held captive laterally between two lateral branches of the fork, the fork being hinged to the rotary swashplate by movement means giving the rotary swashplate a degree of freedom to move in rotation about a radial direction of the rotary swashplate relative to the fork.

Abstract: A bottom abutment device for a rotor having a plurality of lift assemblies. The bottom abutment device comprises at least one abutment track per lift assembly. The bottom abutment device comprises a plate with a ring and one branch per lift assembly. The bottom abutment device has a plurality of supports, each support including fastener means for fastening to a rotary member of the rotor, each support extending in part in an opening in a branch, the supports giving the plate a restricted degree of freedom to move in translation, the supports giving the plate at least one restricted degree of freedom to move in rotation about the axis of symmetry.

Abstract: A rotor for a rotorcraft, the rotor having a plurality of lift assemblies, together with a flapping abutment mechanism for each lift assembly. Each abutment mechanism has a projection secured to a lift assembly with an abutment end provided with an inner face and an outer face, and at least one pivotally-mounted lever extending longitudinally from a flyweight to a hook. The hook is provided with two walls in elevation and a bottom wall forming a periphery that defines the groove, a first wall in elevation having an upper bearing zone for blocking the inner face and a second wall in elevation including a lower bearing zone for blocking the outer face.

Abstract: An abutment mechanism for a lift assembly of an aircraft. The abutment mechanism comprises a single rigid link having variable travel, the link comprising a rod and a body, the rod being movable in translation relative to the body along the longitudinal direction through said travel, the abutment mechanism including a movement member for adjusting an amplitude of the travel as a function of at least one predetermined parameter, the link having two endpieces suitable for being hinged respectively to a said lift assembly and to a said drive system.

Abstract: A rotorcraft rotor having each of its blades fitted with a lead/lag damper. A connection device between the blade root of a blade under consideration and a lead/lag damper comprises a rod passing through a laminated ball joint secured to a distal endpiece of the lead/lag damper. The rod extends in the general plane in which the blade extends, being prevented from moving firstly in rotation by being embedded in the blade root and secondly in translation along the general transversely-extending direction of the blade by being pinned to a U-shaped yoke fastened to the blade root.

Abstract: A set of swashplates having a non-rotary swashplate and a rotary swashplate. The set includes drive means constraining the rotary swashplate and the rotor mast in rotation about the axis of rotation. The drive means are provided with a drive arm driving the rotary swashplate in rotation about the axis of rotation by plane connection means including a fork, the drive arm extending in elevation from a first end to a second end that is fastened to the rotor mast, the first portion being held captive laterally between two lateral branches of the fork, the fork being hinged to the rotary swashplate by movement means giving the rotary swashplate a degree of freedom to move in rotation about a radial direction of the rotary swashplate relative to the fork.

Abstract: A rotor for a rotorcraft, the rotor having a plurality of lift assemblies, together with a flapping abutment mechanism for each lift assembly. Each abutment mechanism has a projection secured to a lift assembly with an abutment end provided with an inner face and an outer face, and at least one pivotally-mounted lever extending longitudinally from a flyweight to a hook. The hook is provided with two walls in elevation and a bottom wall forming a periphery that defines the groove, a first wall in elevation having an upper bearing zone for blocking the inner face and a second wall in elevation including a lower bearing zone for blocking the outer face.

Abstract: A rotor carrying a plurality of lift assemblies, each having a retention and mobility member. An abutment mechanism of a lift assembly includes an abutment track arranged on the retention and mobility member and a single cylindrical abutment that is movable in pivoting about a movement axis, said abutment extending over a height in elevation and also over a length and over a width. The length is greater than said width, and said height is greater than said length. A fly-weight is secured to pivot with said abutment, and a return spring exerts a force on said fly-weight.