Abstract: The present invention relates to a stringer, particularly to a stiffening and structural longitudinal element for skin of aircraft airfoil surfaces, characterized in that it incorporates two separate and independent reinforcement areas, one in the foot and the other at the end of the web (head) of the stringer, where the reinforcement areas are obtained by a widening of the section of the stringer, the widening being formed by a localized stack of reinforcing plies of composite material which are embedded within the stringer. The invention also relates to the method of manufacture and is particularly applicable to stringers having an L-shaped or T-shaped section.

Abstract: The present invention relates to a stringer, particularly to a stiffening and structural longitudinal element for skin of aircraft airfoil surfaces, characterized in that it incorporates two separate and independent reinforcement areas, one in the foot and the other at the end of the web (head) of the stringer, where the reinforcement areas are obtained by a widening of the section of the stringer, the widening being formed by a localized stack of reinforcing plies of composite material which are embedded within the stringer. The invention also relates to the method of manufacture and is particularly applicable to stringers having an L-shaped or T-shaped section.

Abstract: A manhole assembly in the lower skin (37) of an aircraft wing made of a composite material for giving access to an installation placed inside said aircraft wing such as a fuel tank, comprising an inner cover (31) and an outer cover (33) joined by first fastener means (35); the lower skin (37) being configured with a rebated edge (45) around the manhole so that the outer cover (33) can be mounted over the lower skin (37) maintaining the aerodynamic continuity in the aircraft wing surface; the inner cover (31) being mounted over the lower skin (37) by its inner surface with a sealing profile (41) between them and being joined to the lower skin (37) by second fastener means (47).

Abstract: A manhole assembly in the lower skin (37) of an aircraft wing made of a composite material for giving access to an installation placed inside said aircraft wing such as a fuel tank, comprising an inner cover (31) and an outer cover (33) joined by first fastener means (35); the lower skin (37) being configured with a rebated edge (45) around the manhole so that the outer cover (33) can be mounted over the lower skin (37) maintaining the aerodynamic continuity in the aircraft wing surface; the inner cover (31) being mounted over the lower skin (37) by its inner surface with a sealing profile (41) between them and being joined to the lower skin (37) by second fastener means (47).

Abstract: Interface arrangement between a first component (11) and a second component (21) of an aircraft structure having an aerodynamic contour, such as a wing skin and a wing leading edge panel, the first component (11) having a joggle so that it includes a first area (13) which surface (15) belongs to the aircraft aerodynamic contour and a second area (17) where the joint with the second component (21) takes place, the second component (21) having a surface (23) belonging to the aircraft aerodynamic contour, in which the second component (21) includes a chamfer-shaped ending (29) that extends beyond the overlapping area (27) where the joint with the first component (11) takes place so that the gaps (26, 28) between the first component (11) and the second component (21) are minimized.

Abstract: A mult-rib box-shaped aeronautical structure comprising upper and lower skins (19, 21) stiffened by span wise stringers (25, 25?, 25?), span wise front and rear spars (11, 13) and chord wise ribs (27, 27?, 27?), where at least one panel (31, 33) of any of said skins (19, 21) is non delimited by said ribs (27, 27?, 27?) and said stringers (25, 25?, 25?) and comprise an stiffening element (41, 43) arranged as a panel breaker to avoiding the need of increasing the panel thickness to withstand buckling loads.

Abstract: Interface arrangement between a first component (11) and a second component (21) of an aircraft structure having an aerodynamic contour, such as a wing skin and a wing leading edge panel, both components being made of composite material, the first component (11) having a joggle so that it includes a first area (13) which surface (15) belongs to the aircraft aerodynamic contour and a second area (17) where the joint with the second component (21) takes place, the second component (21) having a surface (23) belonging to the aircraft aerodynamic contour, in which an intermediate part (31) made of a composite material or a plastic material and suitable shaped for maintaining the continuity of the aircraft aerodynamic contour in the interface area between said components (11, 13) as well as to fill the expected gap (25) between said components (11, 13), is joined to the first component (21).

Abstract: Interface arrangement between a first component (11) and a second component (21) of an aircraft structure having an aerodynamic contour, such as a wing skin and a wing leading edge panel, the first component (11) having a joggle so that it includes a first area (13) which surface (15) belongs to the aircraft aerodynamic contour and a second area (17) where the joint with the second component (21) takes place, the second component (21) having a surface (23) belonging to the aircraft aerodynamic contour, in which a sealing part (31) suitable shaped to maintain the continuity of the aircraft aerodynamic contour in the interface area between said components (11, 13) as well as to fill the expected gap (25) between said components (11, 13) is joined to the second component (21).

Abstract: The structure comprises: a rim angle (22) with a front portion and a rear portion, the latter being slanted upward and backward and connected to the bulkhead (1); a simple frame (18), being connected to the front portion of the bulkhead (22); a buttstrap (23), being connected between the front portion of the rim angle (22) and the skin (6, 7) of the fuselage of the aircraft; and tension fittings (24, 25), being fitted between the buttstrap (23) and the longitudinal stringers (8, 9) of the fuselage.