A telescopic strut for electrically connecting a fixed structure of an aircraft to a movable structure mounted to the fixed structure, wherein the strut is adapted to be mechanically connected to the fixed structure by its one end and to be mechanically connected to the movable structure by its oppo
A telescopic strut for electrically connecting a fixed structure of an aircraft to a movable structure mounted to the fixed structure, wherein the strut is adapted to be mechanically connected to the fixed structure by its one end and to be mechanically connected to the movable structure by its opposite end, the strut comprising a plurality of telescopic elements and containing a helically coiled electrical cable, wherein the cable is adapted to move between retracted and extended positions with the telescoping of the strut. Also, a method of operating an aircraft having a movable structure mounted to a fixed structure, and one or more of the telescopic struts mechanically and electrically connected between the fixed and movable structures.
대표청구항▼
1. A telescopic strut for electrically connecting a fixed structure of an aircraft to a movable structure mounted to the fixed structure, wherein the strut is adapted to be mechanically connected to the fixed structure by its one end and to be mechanically connected to the movable structure by its o
1. A telescopic strut for electrically connecting a fixed structure of an aircraft to a movable structure mounted to the fixed structure, wherein the strut is adapted to be mechanically connected to the fixed structure by its one end and to be mechanically connected to the movable structure by its opposite end, the strut comprising a plurality of telescopic elements and containing a helically coiled electrical cable, wherein the cable is adapted to move between retracted and extended positions with the telescoping of the strut. 2. A telescopic strut according to claim 1, wherein the cable is pre-sprung so as to be biased to its retracted position. 3. A telescopic strut according to claim 1, further comprising a dielectric material between the strut and the cable. 4. A telescopic strut according to claim 3, wherein the dielectric material includes a flexible liner inside the strut. 5. A telescopic strut according to claim 4, wherein the liner is corrugated. 6. A telescopic strut according to claim 4, wherein the cable is embedded in the liner. 7. A telescopic strut according to claim 3, wherein the dielectric material includes one or more grommets around the cable. 8. A telescopic strut according claim 1, wherein the cable is a power cable and/or a sensor cable. 9. A telescopic strut according to claim 1, including a plurality of the cables. 10. A telescopic strut according to claim 1, further comprising an electrical connection terminal at each end of the strut. 11. An aircraft comprising a fixed structure, a movable structure mounted to the fixed structure, and a telescopic strut in accordance with claim 1 mechanically connected to the fixed structure by its one end and mechanically connected to the movable structure by its opposite end. 12. An aircraft according to claim 11, wherein the fixed structure is a fixed aerofoil and the movable structure is a flight control surface. 13. An aircraft according to claim 11, further comprising a wireless or optical sensor line between the fixed and movable structures. 14. A method of operating an aircraft having a movable structure mounted to a fixed structure, and a telescopic strut mechanically and electrically connected between the fixed and movable structures, wherein the strut comprises a plurality of telescopic elements and contains at least one helically coiled electrical cable, the method comprising moving the movable structure between retracted and extended positions accompanied by corresponding telescoping of the strut and movement of the coiled cable between retracted and extended positions to maintain electrical connection between the fixed and movable structures. 15. A telescopic strut according to claim 3, wherein the dielectric material is adapted to electrically segregate the cable from the strut. 16. A telescopic strut according to claim 3, wherein the dielectric material is attached to inner surfaces of each of the telescopic elements. 17. A telescopic strut according to claim 7, wherein the one or more grommets are mounted to the cable. 18. A telescopic strut according to claim 16, wherein the one or more grommets are adapted to remain substantially fixed with respect to the cable as the cable moves between the retracted and extended positions. 19. A telescopic strut according to claim 16, wherein the one or more grommets are adapted to move freely with respect to the telescoping elements of the strut as the cable moves between the retracted and extended positions. 20. A telescopic strut according to claim 7, wherein the one or more grommets each comprise a central aperture through which the cable passes and one or more additional holes providing damping protection for the cable. 21. A telescopic strut according to claim 1, wherein the helically coiled cable is helically coiled for substantially all of its length inside the telescopic elements. 22. A telescopic strut according to claim 1, wherein the helically coiled cable is helically coiled for all of its length inside the telescopic elements. 23. A telescopic strut according to claim 1, wherein the helically coiled cable is helically coiled for substantially all of its length in both a fully retracted position and a fully extended position. 24. A telescopic strut according to claim 1, wherein the helically coiled cable is helically coiled for all of its length in both a fully retracted position and a fully extended position. 25. The method of claim 14, wherein the coiled cable is coiled for substantially all of its length throughout movement between the retracted and extended positions, wherein the retracted position is a fully retracted position and the extended position is a fully extended position. 26. The method of claim 14, wherein the coiled cable is coiled for all of its length throughout movement between the retracted and extended positions, wherein the retracted position is a fully retracted position and the extended position is a fully extended position. 27. A telescopic strut according to claim 1, wherein the strut is configured such that a total amount of cable inside an enclosed volume established by the telescopic elements is the same when the cable is at a fully retracted position as it is when the cable is at a fully extended position. 28. The method of claim 14, wherein the amount of cable inside an enclosed volume established by the telescopic elements is the same throughout movement between the retracted and extended positions, wherein the retracted position is a fully retracted position and the extended position is a fully extended position.
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