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Blade tips were designed through multi-fidelity surrogate aeroelastic model based optimisation, which resulted in a potential load neutral Annual Energy Production increase of 4-6%. Tip prototypes were manufactured and tested in the Large Scale Facility, in the Poul la Cour wind tunnel and in atmospheric rotating rig tests at DTU. Innovationsfonden invested 10,8 mil. kr. in the project which was a collaboration between DTU Wind Energy and Siemens Gamesa Renewable Energy in Denmark.