Patent ID: 8727285

Claim:
A wing tip device for a wing of an aircraft, wherein the wing tip device comprises: a substantially planar winglet, a transition region connected to the winglet, wherein the wing tip is configured to be mounted on a wing end, wherein the wing end comprises a profile that extends in the direction of the span of the wing, and across said direction of the span of the wing from a wing leading edge to a wing trailing edge, wherein the profile of the wing is delimited by a first skin and a second skin, such that the transition region follows on from a first connection on the wing end; and wherein the transition region extends from the first connection on the end of the wing to a second connection on the winglet, wherein the transition region has a first predetermined radius of curvature of the local dihedral at the first connection and a second predetermined radius of curvature of the local dihedral at the second connection; wherein in the transition region the radius of curvature of the local dihedral decreases in the outboard direction from the first predetermined radius of curvature at the first connection to the second predetermined radius of curvature at the second connection; and wherein said radius of curvature decreases in the outboard direction along any curve formed by a plurality of constant chordwise points in the transition region along the spanwise dimension.