SLAT ARRANGEMENT FOR A WING OF AN AIRCRAFT

Abstract

A slat arrangement for a wing of an aircraft. The arrangement has a movable leading-edge slat and a connection section. The leading-edge slat includes a slat leading edge and a slat trailing edge. The connection section includes a receiving opening for receiving the slat trailing edge. The connection section includes an overhang having a free end. The slat trailing edge is configured to be translated under the overhang. A trailing region of the slat is configured to be elastically deformed by the overhang when the slat trailing edge is moved into the receiving opening.

Claims

1-16. (canceled)

17. A slat arrangement for a wing of an aircraft, the arrangement having a movable leading-edge slat and a connection section, wherein the leading-edge slat comprises a slat leading edge and a slat trailing edge, wherein the connection section comprises a receiving opening for receiving the slat trailing edge, wherein the connection section comprises an overhang having a free end, wherein the slat trailing edge is configured to be translated under the overhang, and wherein a trailing region of the slat is configured to be elastically deformed by the overhang when the slat trailing edge is moved into the receiving opening.

18. The slat arrangement of claim 17, wherein the overhang comprises a greater stiffness than the trailing region of the leading-edge slat.

19. The slat arrangement of claim 17, wherein an upper edge component is arranged on an upper side of the trailing region of the slat trailing edge.

20. The slat arrangement of claim 19, wherein the upper edge component is made from a metallic material.

21. The slat arrangement of claim 19, wherein a transversal cross-sectional profile of the upper edge component comprises a step to receive the overhang.

22. The slat arrangement of claim 19, wherein the upper edge component comprises a receiving surface for receiving the overhang, wherein the overhang extends about a greater chordwise length than the receiving surface.

23. The slat arrangement of claim 17, wherein the trailing region comprises an extension component, which delimits the slat at the trailing edge and which extends along a part of the slat in a spanwise direction.

24. The slat arrangement of claim 23, wherein the extension component is made from a plastic material.

25. The slat arrangement of claim 19, wherein the trailing region comprises an extension component, which delimits the slat at the trailing edge and which extends along a part of the slat in a spanwise direction, and wherein the upper edge component is arranged on an upper side of the extension component.

26. The slat arrangement of claim 25, wherein the extension component comprises at least one spanwise step configured to receive the upper edge component.

27. The slat arrangement of claim 23, wherein the leading-edge slat comprises an outer skin, which encloses at least a part of the extension component.

28. The slat arrangement of claim 23, wherein the extension component is pre-tensioned to deflect in an upwards direction in an extended position of the slat.

29. The slat arrangement of claim 23, further comprising a spring element that is configured to deflect the extension component upwards.

30. A wing for an aircraft, having a base wing with a base wing leading edge, the wing further comprising at least one slat arrangement of claim 17, wherein the connection section is arranged on the base wing leading edge.

31. The wing of claim 30, wherein the overhang is a part of a wing skin of the base wing.

32. An aircraft, comprising at least one slat arrangement according to claim 17.

33. An aircraft, comprising at least one wing according to claim 30.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other characteristics, advantages and potential applications of the present invention result from the following description of the exemplary embodiments illustrated in the figures. In this respect, all described and/or graphically illustrated characteristics also form the object of the invention individually and in arbitrary combination regardless of their composition in the individual claims or their references to other claims. Furthermore, identical or similar objects are identified by the same reference symbols in the figures.

[0027] FIG. 1 shows a slat arrangement in a schematic lateral overview.

[0028] FIG. 2 shows a detail of the trailing edge and the connection section in a cross-sectional view in an extended position.

[0029] FIG. 3 shows the detail of FIG. 2 in a retracted position.

[0030] FIG. 4 shows an aircraft with such a slat arrangement.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] FIG. 1 shows a slat arrangement 2 for a wing of an aircraft in a schematic sectional view in an extended position. Here, the slat arrangement 2 comprises a movable leading edge slat 4 and a connection section 6. The leading edge slat 4 may extend along a substantially chordwise section of a base wing 8. It may be movable from a retracted position, which is indicated with dashed lines in FIG. 1, and a plurality of extended positions. The base wing 8 comprises a base wing leading edge 9, at which a base wing depression 11 is provided for receiving the slat 4. When moving the slat 4 from the retracted position to extended positions, it conducts a translational motion in combination with a slight rotation. However, this may depend on the type of aircraft, to which the slat 4 is installed.

[0032] The connection section 6 may be a part of the base wing 8. A slat trailing edge 10, which is arranged opposite to a slat leading edge 5, comprises a shape that allows to move the trailing edge 10 underneath an overhang (not shown in this illustration). The slat 4 and the base wing 8 then provide a flush and smooth transition. The details of the connection section 6 and the trailing edge 10 are shown in further detail in FIG. 2.

[0033] The connection section 6 comprises an overhang 12, which may be a part of a skin 14 of the base wing 8. The overhang has a free end 13 that protrudes from the base wing 8 over a receiving opening 16. Thus, the receiving opening 16 is created and delimited by the overhang 12 for receiving the trailing edge 10.

[0034] The slat 4 comprises a trailing region 18, which includes the trailing edge 10. The trailing region 18 is configured to be compressed and/or deformed by the overhang 12 when the trailing edge 10 is moved into the receiving opening 16. This is further supported by the overhang 12 having a greater stiffness than the trailing region 18 of the slat 4. The reduction of the stiffness of the trailing region 18 may be achieved by installing an extension component 20 to the slat 4 in the trailing region 18. For this purpose, the extension component 20 may be made from a suitable plastic material, in particular a thermoplastic material, or a suitable metallic material, such as an aluminum alloy. Consequently, when moving the trailing edge 10 into the receiving opening 16 it is urged into a compressed or deflected position by the stiffer overhang 12.

[0035] The extension component 20 may extend along the whole spanwise extension of the slat 4. It may also extend between two end faces of the slat 4, which are not shown in detail in this illustration. For fastening the extension component 20 to the slat 4, it comprises a flange or tongue 22, which is arranged between two sections 24 and 26 of a slat skin 28. The flange 22 comprises second steps 30, which are in a flush contact with the skin 28. Bolts 32 are installed to fix the skin 28 and the flange 22. A bushing 33 may be inserted around the bolts 32 to additionally support the sections 24 and 26 of the slat skin 28 and maintaining their precise position.

[0036] Directly at the trailing edge 10, an upper edge component 34 is arranged on an upper side of the trailing region 18. In fact, in this example, the upper edge component 34 is attached to the upper side of the extension component 20. It is made from a metallic material and may as well extend along the substantially complete length in a spanwise direction of the slat 4. It may comprise a higher stiffness than the extension component 20 and may act for protecting the extension component 20. Still further, it comprises a third step 36, which delimits a receiving surface 38. The receiving surface 38 receives the overhang 12, which may comprise a larger chordwise width WO than the receiving surface 38, which has a width WR in chordwise direction. Thus, when moving the trailing edge 10 underneath the overhang 12, the overhang 12 travels along the receiving surface 38 under deforming of the extension components 20. It reaches the third step 36, such that a smooth and even transition between the upper edge component 34 and the overhang 12 is reached.

[0037] The extension component 20 also comprises a fourth step 40 for receiving the upper edge component 34. Thus, the upper edge component 34 may precisely be attached to the extension component 20, without creating gaps. For this, also a serious of bolts 32 is provided, which may be distributed along the spanwise direction.

[0038] It is advantageous if the trailing edge 10 is pressed onto the inner side of the overhang 12. This can be supported by flexing the extension component 20 in an upward direction 42. For example, this is achievable by a pretensioning of the extension component 20, such that it always slightly urges into the upward direction 42. However, it may also be feasible to provide a spring element 44 at the underside of the slat 4 in the show manner. Directly under the trailing edge 10, a first attachment flange 46 with a first joint 48 may be provided to receive the spring element 44. At a further forward position, which may be slightly forward of the trailing region 18, a second attachment flange 50 is shown with a second joint 52 to hold the spring element 44. Thus, the spring element 44 can exert a pressing force, which urges the first joint 48 and resultantly the trailing edge 10 into the upward direction 42. Thus, when moving the trailing edge 10 underneath the overhang 12, a flush contact of the upper edge component 34 and the overhang 12 is guaranteed.

[0039] The retracted position is further shown in FIG. 3. For illustration purposes, i.e., to clearly show the distinct elements, all elements shown enclose a small gap to adjacent elements. However, it is to be understood, that all elements are in a flush contact to each other. Here a slight intermediate space 54 between the trailing edge 10 and the receiving opening 16 can be seen, which allows to fully receive the trailing edge 10 without contacting a rear end of the opening 16. The overhang 12 is in flush surface contact with the upper edge component 34 and the third step 36. Thus, a smooth surface for an airflow 56 is provided.

[0040] FIG. 4 shows an aircraft 58 having wings 60, to which such a slat arrangement 2 is attached.

[0041] In addition, it should be pointed out that “comprising” does not exclude other elements or steps, and “a” or “an” does not exclude a plural number.

[0042] While at least one exemplary embodiment of the present invention(s) is disclosed herein, it should be understood that modifications, substitutions and alternatives may be apparent to one of ordinary skill in the art and can be made without departing from the scope of this disclosure. This disclosure is intended to cover any adaptations or variations of the exemplary embodiment(s). In addition, in this disclosure, the term “or” means either or both. Furthermore, characteristics or steps which have been described may also be used in combination with other characteristics or steps and in any order unless the disclosure or context suggests otherwise. This disclosure hereby incorporates by reference the complete disclosure of any patent or application from which it claims benefit or priority.

REFERENCE NUMERALS

[0043] 2 slat arrangement [0044] 4 movable leading-edge slat [0045] 5 slat leading edge [0046] 6 connection section [0047] 8 base wing [0048] 9 base wing leading edge [0049] 10 trailing edge [0050] 11 base wing depression [0051] 12 overhang [0052] 13 free end [0053] 14 skin of base wing [0054] 16 receiving opening [0055] 18 trailing region [0056] 20 extension component [0057] 22 flange [0058] 24 section of slat skin [0059] 26 section of slat skin [0060] 28 slat skin [0061] 30 second step [0062] 32 bolt [0063] 33 bushing [0064] 34 upper edge component [0065] 36 third step [0066] 38 receiving surface [0067] 40 fourth step [0068] 42 upward direction [0069] 44 spring element [0070] 46 first attachment flange [0071] 48 first joint [0072] 50 second attachment flange [0073] 52 second joint [0074] 54 intermediate space [0075] 56 airflow [0076] 58 aircraft [0077] 60 wing [0078] W.sub.O width of overhang [0079] W.sub.R width of receiving surface