An aircraft wing comprising a clutch (170, 310) configured for actuating a wing tip device on an aircraft, the aircraft wing comprising a fixed wing, a wing tip device, and a wing tip actuator for moving the wing tip device relative to the fixed wing, the clutch being operable to selectively transmit torque between the wing tip actuator and the wing tip device via engagement of a first shaft with a second shaft, characterized in that, the clutch is comprising: first and second friction members (232, 234) coupled with the first shaft, and each having a frusto-conical friction surface (233, 235); a third friction member coupled with the second shaft, and arranged coaxially with, and between, the first and second friction members, the third friction member having first and second frusto-conical friction surfaces (237, 238) operable such that, when the clutch is engaged, the first and second friction surfaces of the third friction member are brought into contact with the friction surfaces of the first and second friction members, respectively; spacer means arranged between the first and second friction members, the spacer means being operable to separate the first and second friction surfaces of the third friction member from the friction surfaces of the first and second friction members, respectively, when the clutch is in a disengaged state; and a fourth friction member coupled with the second shaft and arranged coaxially with the first, second and third friction members, the second friction member being arranged between the third friction member and the fourth friction member, the fourth friction member having a frusto-conical friction surface, wherein the second friction member has first and second frusto-conical friction surfaces operable such that, when the clutch is engaged, the first friction surface of the second friction member is brought into contact with the second friction surface of the third friction member, and the second friction surface of the second friction member is brought into contact with the friction surface of the fourth friction member. first and second friction members (232, 234) coupled with the first shaft, and each having a frusto-conical friction surface (233, 235); a third friction member coupled with the second shaft, and arranged coaxially with, and between, the first and second friction members, the third friction member having first and second frusto-conical friction surfaces (237, 238) operable such that, when the clutch is engaged, the first and second friction surfaces of the third friction member are brought into contact with the friction surfaces of the first and second friction members, respectively; spacer means arranged between the first and second friction members, the spacer means being operable to separate the first and second friction surfaces of the third friction member from the friction surfaces of the first and second friction members, respectively, when the clutch is in a disengaged state; and a fourth friction member coupled with the second shaft and arranged coaxially with the first, second and third friction members, the second friction member being arranged between the third friction member and the fourth friction member, the fourth friction member having a frusto-conical friction surface, wherein the second friction member has first and second frusto-conical friction surfaces operable such that, when the clutch is engaged, the first friction surface of the second friction member is brought into contact with the second friction surface of the third friction member, and the second friction surface of the second friction member is brought into contact with the friction surface of the fourth friction member.