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A winglet for a rotor blade is disclosed. The winglet may generally include a winglet body extending between a first end and a second end. The winglet body may define a sweep and may have a curvature defined by a curve fit including a first radius of curvature and a second radius of curvature. The s

A winglet for a rotor blade is disclosed. The winglet may generally include a winglet body extending between a first end and a second end. The winglet body may define a sweep and may have a curvature defined by a curve fit including a first radius of curvature and a second radius of curvature. The sweep between the first end and the second end may range from about 580 millimeters to about 970 millimeters. Additionally, the first radius of curvature may range from about 1500 millimeters to about 2500 millimeters and the second radius of curvature may range from about 1200 millimeters to about 2000 millimeters.

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1. A rotor blade for a wind turbine, comprising: a blade body extending from a blade root towards a blade tip, the blade body defining a spanwise direction:a winglet body extending between a first end defined at an interface between the blade body and the winglet body and a second end defined at the

1. A rotor blade for a wind turbine, comprising: a blade body extending from a blade root towards a blade tip, the blade body defining a spanwise direction:a winglet body extending between a first end defined at an interface between the blade body and the winglet body and a second end defined at the blade tip, the winglet body defining a sweep and having a curvature defined by a curve fit including a first radius of curvature and a second radius of curvature, the sweep at a particular radial location along the winglet body being defined as a distance between a first chord location at the interface and a second chord location at the particular radial location, the first radius of curvature being defined relative to a first reference axis extending parallel to the spanwise direction of the blade body, the second radius of curvature being defined relative to a second reference axis extending perpendicular to the first reference axis, the first chord location being defined at a pre-defined percentage of a chord of the winglet body at the interface, the second chord location being defined at the pre-defined percentage of the chord at the particular radial location,wherein the sweep defined between the first end and the second end ranges from about 580 millimeters to about 970 millimeters,wherein the first radius of curvature ranges from about 1500 millimeters to about 2500 millimeters and the second radius of curvature ranges from about 1200 millimeters to about 2000 millimeters. 2. The winglet of claim 1, wherein the chord of the winglet body at the first end ranges from about 750 millimeters to about 1260 millimeters. 3. The winglet of claim 1, wherein the chord of the winglet body at the second end ranges from about 35 millimeters to about 200 millimeters. 4. The winglet of claim 1, wherein the winglet body further defines a toe angle, the toe angle at the second end ranging from about 0.62 degrees to about 1.04 degrees. 5. The winglet of claim 1, wherein the winglet body further defines a spanwise radius, the spanwise radius defined between the first end and the second end ranging from about 2000 millimeters to about 3750 millimeters. 6. The winglet of claim 1, wherein the winglet body further defines a spanwise radius and a pre-bend, the spanwise radius of a portion of the winglet body including pre-bend ranging from about 1500 mm to about 2500 mm. 7. The winglet of claim 1, wherein the winglet body further defines a twist angle, the twist angle at the first end ranging from about −1.1 degrees to about −1.9 degrees. 8. The winglet of claim 1, wherein the winglet body further defines a twist angle, the twist angle at the second end ranging from about −6.7 degrees to about −11.3 degrees. 9. The winglet of claim 1, wherein the winglet further defines a cant angle, the cant angle at the second end ranging from about 64 degrees to about 108 degrees. 10. The winglet of claim 1, wherein the winglet body further defines a pre-bend, the pre-bend defined between the first end and the second end ranging from about 1500 millimeters to about 3450 millimeters. 11. A rotor blade for a wind turbine, comprising: a blade body extending from a blade root towards a blade tip;a winglet body extending between a first end defined at an interface between the blade body and the winglet body and a second end defined at the blade tip and including a plurality of radial locations between the first and second ends, the winglet body extending in a chordwise direction between a leading edge and a trailing edge, the winglet body defining a chord and a twist angle at each of the plurality of radial locations generally in accordance with the values for chord and twist angle shown in TABLE 1, the chord being measured along a reference line extending between the leading and trailing edges of the winglet body, the winglet body further defining a pitch axis, the twist angle corresponding to an angle defined between a first reference line extending parallel to the chord and a second reference line extending through the pitch axis at a zero degree twist angle,wherein each of the values for chord shown in TABLE 1 may be varied +/−10% and each of the values for twist angle shown in TABLE 1 may be varied +/−1 degree. 12. The winglet of claim 11, wherein the winglet body further defines a cant angle, the cant angle at the second end ranging from about 64 degrees to about 108 degrees. 13. The winglet of claim 11, wherein the winglet body further defines a pre-bend, the pre-bend defined between the first end and the second end ranging from about 1500 millimeters to about 3450 millimeters. 14. The winglet of claim 11, wherein the winglet body further defines a spanwise radius, the spanwise radius defined between the first end and the second end ranging from about 2000 millimeters to about 3750 millimeters. 15. The winglet of claim 11, wherein the winglet body further defines a spanwise radius and a pre-bend, the spanwise radius of a portion of the winglet body including pre-bend ranging from about 1500 mm to about 2500 mm. 16. The winglet of claim 11, wherein the winglet further defines a sweep, the sweep defined between the first end and the second end ranging from about 580 millimeters to about 970 millimeters. 17. The winglet of claim 11, wherein the winglet further defines a toe angle, the toe angle at the second end ranging from about 0.62 degrees to about 1.04 degrees. 18. The winglet of claim 11, wherein the winglet body has a curvature defined by a curve fit having a first radius of curvature and a second radius of curvature, the first radius of curvature ranging from about 1500 millimeters to about 2500 millimeters and the second radius of curvature ranging from about 1200 millimeters to about 2000 millimeters. 19. A winglet for a rotor blade, comprising: a winglet body, the winglet body defining cross-sectional profiles at a plurality of radial locations along the winglet body generally in accordance with the values shown in TABLE 1, the cross-sectional profiles being joined so as to define a nominal shape of the winglet body,wherein the nominal shape lies in an envelope within +/−10% of each length value provided in TABLE 1, within +/−20 degrees of each cant angle value provided in TABLE 1 and within +/−1 degree of each toe angle and twist angle value provided in TABLE 1,wherein the length values correspond to a spanwise radius of the winglet body, a chord of the winglet body, a pitch axis of the winglet body, a sweep of the winglet body and a pre-bend of the winglet body. 20. The winglet of claim 19, wherein the nominal shape lies in an envelope within +/−5% of each length value provided in TABLE 1, within +/−10 degrees of each cant angle value provided in TABLE 1 and within +/−0.5 degrees of each toe angle and twist angle value provided in TABLE 1.