Patent ID: 8066489

Claim:
An aerofoil assembly comprising: a plurality of rotatable blades; and a damping member disposed between at least two of the blades, each of the at least two blades having an aerofoil portion, a stem portion and a root portion, a recess being defined by two cooperating stem portions, a first shelf extending from a leading edge of each recess, and a second shelf extending from a trailing edge of each recess to define a compartment, the damping member having a first projection disposed at one corner of the damping member adjacent the first shelf in use, and a second projection on a diagonally opposite corner adjacent the second shelf in use, a longitudinal distance between ends of the first and second projections being greater than a distance between edges of the first and second shelf, such that when the blades are aligned, only one side of the shelves holds the damping member within the compartment.