Wing tip mechanism

An aircraft wing, the aircraft wing comprising a fixed wing and a wing tip device at the tip thereof, wherein the wing tip device is configurable between:

• (i) a flight configuration for use during flight and (ii) a ground configuration for use during ground-based operations, in which ground configuration the wing tip device is moved away from the flight configuration such that the span of the aircraft wing is reduced, the aircraft wing further comprising
• a hinge arrangement connecting the fixed wing and the wing tip device, wherein the hinge arrangement comprises
• a plurality of fixed wing interface rings,
• a plurality of wing tip device interface rings, and
• a geared rotary actuator (GRA) partially located within the fixed wing interface rings and wing tip device interface rings, and arranged to drive the wing tip device interface rings to move the wing tip device between the flight configuration and ground configuration.