Removable lift assembly for a rotorcraft, and a rotorcraft
First Claim
1. A lift assembly for a rotorcraft, the lift assembly configured to fasten in removable manner to a fuselage of a rotorcraft and comprising:
- a fixed wing comprising in succession in a transverse direction;
a left lift segment;
a central box for fastening to the fuselage; and
a right lift segment;
the wing having at least two spars extending from the left lift segment to the right lift segment, the wing extending in elevation from a pressure side to a suction side and longitudinally from a leading edge to a trailing edge;
a main gearbox extending in elevation from a bottom towards a top, the main gearbox having a mast for setting in rotation a lift rotor, the main gearbox passing through an opening in the suction side of the central box so that the bottom of the main gearbox is attached to a resilient suspension system arranged at the level of the pressure side of the central box, wherein the top projects from the central box and is fastened to at least one of the at least two spars by at least three suspension bars; and
a reversible fastener system having a plurality of fastener means for reversibly fastening the central box to a plurality of fastener points of the fuselage;
wherein the at least two spars include a leading edge spar and a trailing edge spar, each of the at least three suspension bars is fastened via a fitting to the leading edge spar or the trailing edge spar, the central box extends transversely from a left side beam to a right side beam, each side beam extends longitudinally from the leading edge spar to the trailing edge spar, and each side beam is secured to a stiffening piece extending between the side beam and one of the leading edge and trailing edge spars so that the central box defines a hollow inside space that receives the bottom of the main gearbox.
1 Assignment
0 Petitions
Accused Products
Abstract
A lift assembly that is releasably fastened to a fuselage of a rotorcraft. The lift assembly comprises a wing comprising at least two spars. A main gearbox passes through an opening in the suction side of a central box of the wing so that its bottom is attached to a resilient suspension system arranged level with the pressure side of the central box, a top of the main gearbox projecting from the central box and being fastened to at least one spar by at least three suspension bars. A reversible fastener system having a plurality of fastener means serves to fasten the central box reversibly to a plurality of fastener points of a fuselage.
37 Citations
20 Claims
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1. A lift assembly for a rotorcraft, the lift assembly configured to fasten in removable manner to a fuselage of a rotorcraft and comprising:
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a fixed wing comprising in succession in a transverse direction;
a left lift segment;
a central box for fastening to the fuselage; and
a right lift segment;
the wing having at least two spars extending from the left lift segment to the right lift segment, the wing extending in elevation from a pressure side to a suction side and longitudinally from a leading edge to a trailing edge;a main gearbox extending in elevation from a bottom towards a top, the main gearbox having a mast for setting in rotation a lift rotor, the main gearbox passing through an opening in the suction side of the central box so that the bottom of the main gearbox is attached to a resilient suspension system arranged at the level of the pressure side of the central box, wherein the top projects from the central box and is fastened to at least one of the at least two spars by at least three suspension bars; and a reversible fastener system having a plurality of fastener means for reversibly fastening the central box to a plurality of fastener points of the fuselage; wherein the at least two spars include a leading edge spar and a trailing edge spar, each of the at least three suspension bars is fastened via a fitting to the leading edge spar or the trailing edge spar, the central box extends transversely from a left side beam to a right side beam, each side beam extends longitudinally from the leading edge spar to the trailing edge spar, and each side beam is secured to a stiffening piece extending between the side beam and one of the leading edge and trailing edge spars so that the central box defines a hollow inside space that receives the bottom of the main gearbox. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A rotorcraft comprising:
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a fuselage; and a lift assembly including; a fixed wing comprising in succession in a transverse direction;
a left lift segment, a central box fastened to the fuselage, and a right lift segment, the wing having at least two spars extending from the left lift segment to the right lift segment, the wing extending in elevation from a pressure side to a suction side and longitudinally from a leading edge to a trailing edge;a lift rotor; a main gearbox extending in elevation from a bottom towards a top, the main gearbox having a mast for setting in rotation the lift rotor, the main gearbox passing through an opening in the suction side of the central box so that the bottom of the main gearbox is attached to a resilient suspension system arranged at the level of the pressure side of the central box, wherein the top projects from the central box and is fastened to at least one of the at least two spars by at least three suspension bars; and a fastener system having a plurality of fastener means for fastening the central box to a plurality of fastener points of the fuselage; wherein the at least two spars include a leading edge spar and a trailing edge spar, each of the at least three suspension bars is fastened via a fitting to the leading edge spar or the trailing edge spar, the central box extends transversely from a left side beam to a right side beam, each side beam extends longitudinally from the leading edge spar to the trailing edge spar, and each side beam is secured to a stiffening piece extending between the side beam and one of the leading edge and trailing edge spars so that the central box defines a hollow inside space that receives the bottom of the main gearbox. - View Dependent Claims (16, 17)
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18. A lift assembly for a rotorcraft, the lift assembly configured to fasten in removable manner to a fuselage of a rotorcraft and comprising:
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a fixed wing comprising in succession in a transverse direction;
a left lift segment, a central box, and a right lift segment, the wing having a leading edge spar and a trailing edge spar that each extend from the left lift segment to the right lift segment, the wing extending in elevation from a pressure side to a suction side and longitudinally from a leading edge to a trailing edge;a main gearbox extending in elevation from a bottom towards a top, the main gearbox having a mast for setting in rotation a lift rotor, the main gearbox passing through an opening in the suction side of the central box so that the bottom of the main gearbox is attached to a resilient suspension system arranged at the level of the pressure side of the central box, wherein the top projects from the central box and is fastened to the wing by two front suspension bars and two rear suspension bars; and a fastener system configured to removably fasten the central box to a plurality of fastener points of the fuselage; wherein each front suspension bar is fastened via a fitting to the leading edge spar, and each rear suspension bar is fastened via a fitting to the trailing edge spar, wherein the central box extends transversely from a left side beam to a right side beam, each side beam extending longitudinally from the leading edge spar to the trailing edge spar, and wherein each side beam is secured to a stiffening piece extending between the side beam and one of the leading edge and trailing edge spars so that the central box defines a hollow inside space that receives the bottom of the main gearbox. - View Dependent Claims (19, 20)
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Specification