Patent ID: 8770523

Claim:
An aerodynamic profile for aircraft rotor blade, the aerodynamic profile comprising: a rotor blade contour being reversible deformable wherein the contour is defined by a rear hollow profile region extending from a front solid profile region, the rear hollow profile region having bottom and top cover skins that extend from the front solid profile region and close off the rear hollow profile by providing a sealed coating on a pressure side and on a suction side of the rotor blade respectively, the bottom cover skin and the top cover skin merging in a trailing edge of the rear hollow profile region; an elastic core disposed along an inwards-facing surface of each of the bottom and top cover skins; at least one piezo-actuator connected to the rear hollow profile region by effective connections attached to the bottom cover skin and the top cover skin for controllably setting the position of the rear hollow profile region relative to the front solid profile region; and at least one layer design of fiber reinforced material to which at least one of the effective connections is attached, each layer design of fiber reinforced material having at least one targeted bending line of the cover skins formed adjacent the trailing edge, the targeted bending line defined by at least one of an interruption and an undulation or strand of the layer design of fiber reinforced material, wherein the rear hollow profile region is elastically deformable at the targeted bending lines which form reversal points upon actuation of the actuator as an integral Flettner flap being reversibly deformable to define the contour of the rear hollow profile region in an s-shaped manner.