Moveable wing tip arrangements
A wing assembly for an aircraft is disclosed having an actuation assembly configured to move a wing tip device between a flight configuration and a ground configuration. The actuation assembly includes at least two linear actuation devices mounted within the wing assembly. A wing and a wing tip device for the wing assembly, and an aircraft comprising the wing assembly, wing or wing tip, are also disclosed.
1. A wing assembly for an aircraft, the wing assembly comprising a wing, a movable wing tip device at the tip of the wing, and an actuation assembly configured to move the wing tip device between:
i. a flight configuration for use during flight, in which the wing tip device projects from the wing for increasing the span of the aircraft, and
ii. a ground configuration for use during ground-based manoeuvres, in which ground configuration the wing tip device is moved away from the flight configuration for reducing the span of the aircraft,
the actuation assembly comprising at least two linear actuation devices mounted within the wing assembly to drivably connect the wing and the wing tip device for moving the wing tip device relative to the wing, the actuation devices being disposed adjacent respective bottom edge portions of respective front and rear spars of the wing assembly;
the wing assembly further comprising a hinge arrangement disposed in a region of the upper covers of the wing assembly and extending between the respective front spar and the rear spar; and,
wherein the wing tip device comprises at least two pivot mounts disposed in spaced relation widthwise of the wing tip device adjacent respective bottom edge portions of respective spars of the wing tip device,
wherein each pivot mount is configured to pivotably connect to a respective linear actuation device of a wing adjacent respective bottom edge portion of the respective spar for driving relative movement between the wing tip device and the wing.
2. A wing assembly according to claim 1 , wherein each actuation device has a longitudinal axis extending spanwise of the wing assembly, the longitudinal axes of the actuation devices being disposed in spaced relation in a widthwise direction of the wing assembly.
3. A wing assembly according to claim 1 , wherein the wing is connected by the hinge arrangement to the movable wing tip device, and the actuation assembly is configured to move the wing tip device relative to the wing about an axis of the hinge arrangement, each actuation device having a longitudinal axis that extends transversely of the hinge axis, the longitudinal axes of the actuation devices being disposed in spaced relation in a direction of the hinge axis.
4. A wing assembly according to claim 1 , wherein the actuation devices are disposed adjacent lower covers of the wing assembly.
5. A wing assembly according to claim 1 , wherein the hinge arrangement comprises a sequence of hinges interspersed with upper latches.
6. A wing assembly according to claim 1 , wherein the hinge arrangement extends substantially uninterrupted between the front spar and the rear spar.
7. A wing assembly according to claim 1 , wherein at least one of the actuation devices comprises a base portion mounted within the wing, a driven portion movable relative to the base portion, and a connection portion, an outer end portion of the connection portion being pivotably connected to a pivot mount of the movable wing tip device.
8. A wing assembly according to claim 7 , wherein the connection portion is pivotably connected to the driven portion.
9. A wing assembly according to claim 1 , wherein a base portion of at least one of the actuation devices is mounted in a spanwise direction of the first spar or the second spar of the wing assembly so as to be structurally supported by said spars.
10. A wing assembly according to claim 1 , at least one said actuation device being mounted aft of the rear spar of the wing, and/or at least one said actuation device being mounted forward of the front spar of the wing.
11. A wing assembly according to claim 1 , wherein the longitudinal axes of the actuation devices are mutually substantially parallel.
12. A wing for a wing assembly according to claim 1 , the wing being configured to mount at least two linear actuation device base portions disposed in spaced relation widthwise of the wing adjacent respective bottom edge portions of respective spars of the wing for pivotably driving relative movement between the wing tip device and the wing.
13. An aircraft comprising a wing assembly according to claim 1 .
14. A large passenger or cargo aircraft according to claim 13 .
15. A wing assembly for an aircraft, the wing assembly comprising a wing, a movable wing tip device at the tip of the wing, and an actuation assembly configured to move the wing tip device between:
i. a flight configuration for use during flight, in which the wing tip device projects from the wing for increasing the span of the aircraft, and
ii. a ground configuration for use during ground-based manoeuvres, in which ground configuration the wing tip device is moved away from the flight configuration for reducing the span of the aircraft,
the actuation assembly comprising at least two linear actuation devices mounted within the wing assembly to drivably connect the wing and the wing tip device for moving the wing tip device relative to the wing, the actuation devices being disposed adjacent respective bottom edge portions of respective front and rear spars of the wing assembly;
the wing assembly further comprising a hinge arrangement disposed in a region of the upper covers of the wing assembly and extending between the respective front spar and the rear spar; and
wherein each of the at least two linear actuation devices comprises:
a base portion mounted within the wing,
a driven portion movable relative to the base portion,
a connection portion, and
wherein an outer end portion of the connection portion being pivotably connected to a pivot mount adjacent respective bottom edge portion of the movable wing tip device.