A rotor assembly adjusted to rotate in a certain rotational direction, having a rotor shaft and at least two rotor blades coupled to a rotor head which in turn is connected to the rotor shaft, the rotor blades extending outwards from the rotor shaft, comprising: a non-rotating swash plate through which centre the rotor shaft runs, being adjusted to tilt around all of its radial axis, a respective pitch hinge for each rotor blade, wherein each respective pitch hinge consists of a rotor head hinge part and a rotor blade hinge part hinged together in a hinge axis generally parallel to the longitudinal axis of the respective rotor blade,connecting said respective rotor blade to the rotor head, wherein the hinge axis which the pitch hinge rotates around is generally parallel to and is positioned in front of the longitudinal centre axis of the respective rotor blade in the rotational direction, and a respective guide member for each rotor blade connected to an inner blade tip extended inwards and forwards from an inner part of the rotor blade hinge part, said inner blade tip being positioned in front of the hinge axis in the rotational direction and said guide member being adjusted to follow an upper surface of the non-rotating swash plate when the rotor assembly rotates, wherein one or more magnetic, spring and/or aerodynamic forces are applied on the rotor blades sufficiently strong to create a valve effect on the pitch hinge pressing the guide members downwards against the non-rotating swash plate, whereby movements of the non-rotating swash plate are transferred to blade pitch movements of the rotor blades, wherein the valve effect keeps a wheel comprised in each guide member stably rolling on the non-rotating swash plate, thereby connecting the swash plate's movements to the blade pitch. a non-rotating swash plate through which centre the rotor shaft runs, being adjusted to tilt around all of its radial axis, a respective pitch hinge for each rotor blade, wherein each respective pitch hinge consists of a rotor head hinge part and a rotor blade hinge part hinged together in a hinge axis generally parallel to the longitudinal axis of the respective rotor blade,connecting said respective rotor blade to the rotor head, wherein the hinge axis which the pitch hinge rotates around is generally parallel to and is positioned in front of the longitudinal centre axis of the respective rotor blade in the rotational direction, and a respective guide member for each rotor blade connected to an inner blade tip extended inwards and forwards from an inner part of the rotor blade hinge part, said inner blade tip being positioned in front of the hinge axis in the rotational direction and said guide member being adjusted to follow an upper surface of the non-rotating swash plate when the rotor assembly rotates, wherein one or more magnetic, spring and/or aerodynamic forces are applied on the rotor blades sufficiently strong to create a valve effect on the pitch hinge pressing the guide members downwards against the non-rotating swash plate, whereby movements of the non-rotating swash plate are transferred to blade pitch movements of the rotor blades, wherein the valve effect keeps a wheel comprised in each guide member stably rolling on the non-rotating swash plate, thereby connecting the swash plate's movements to the blade pitch.