In the present study different blade shape designs are evaluated in forward flight and hover condition to improve the performance of the helicopter rotor. In particular the effect of introducing an-/dihedral and a variation of the chord length is examined. Anhedral has a positive effect on hover performance while dihedral is of advantage in forward flight. Increased chord length shows benefits in forward flight within a broad range of its parameters radial position and size of the chord length. Finally, the noise emission is evaluated for several promising blade shapes in an ICAO 6°-descent flight condition. The examined blade shapes differ only slightly in their acoustic properties.
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