Aircraft panel assembly
An aircraft panel assembly with a panel and a plurality of stiffeners on the panel is disclosed. Each stiffener has an attachment part attached to the panel and a structural part spaced apart from the panel. A rib foot beam crosses the stiffeners at a series of intersections. At each intersection the rib foot beam is located between the panel and the structural part of a respective one of the stiffeners.
1. An aircraft wing, comprising:
an upper wing cover assembly;
a lower wing cover assembly; and
a rib connecting the upper wing cover assembly to the lower wing cover assembly;
wherein at least one of the wing cover assemblies comprises:
a panel; and
a plurality of stiffeners on the panel,
wherein each stiffener comprises an attachment part attached to the panel and a structural part spaced apart from the panel, the structural part comprising a batten, wherein the structural part of each stiffener comprises a crown which joins a pair of webs to each other; and
a rib foot beam which crosses the stiffeners at a series of intersections,
wherein at each intersection the rib foot beam is located between the panel and the structural part of a respective one of the stiffeners,
wherein the rib foot beam is attached to the rib between the intersections,
wherein the rib foot beam is directly bonded to the batten, and
wherein the batten is positioned between the webs and in contact with the crown at an apex of the stiffener.
2. The aircraft wing according to claim 1 wherein the attachment part of each stiffener is bonded to the panel.
3. The aircraft wing according to claim 1 wherein the rib foot beam is bonded to the panel.
4. The aircraft wing according to claim 1 wherein the rib foot beam is bonded to the stiffeners at the intersections.
5. The aircraft wing according to claim 1 wherein at each intersection the structural part of the respective one of the stiffeners extends continuously across the intersection.
6. The aircraft wing according to claim 1 wherein at each intersection the structural part of the respective one of the stiffeners comprises reinforcement fibres which extend continuously across the intersection.
7. The aircraft wing according to claim 1 further comprising a layer which forms the structural parts of all of the stiffeners and covers the rib foot beam between the stiffeners.
8. The aircraft wing according to claim 1 wherein the stiffeners are bonded to an inner surface of the panel, and the panel has an outer surface with a curved aerodynamic profile.
9. The aircraft wing according to claim 1 wherein the attachment part of each stiffener comprises a pair of feet and the pair of webs.
10. The aircraft wing according to claim 1 wherein the attachment part of each stiffener comprises a pair of feet and a pair of webs; and the structural part of each stiffener comprises a crown which joins the pair of webs to each other and a reinforcement element between the webs.
11. The aircraft wing according to claim 1 , wherein the plurality of stiffeners comprises cut fibers.
12. The aircraft wing according to claim 1 , wherein each stiffener further comprises a core, the core comprises a core material, the structural part comprises a structural material, and the core material has a lower density than the structural material.
13. The aircraft wing according to claim 1 , wherein each stiffener further comprises a foam core.
14. The aircraft wing according to claim 1 , wherein each stiffener further comprises a core formed in segments, and at each intersection the rib foot beam passes through a gap between adjacent segments of the core.