Patent ID: 9302762
Filing Date: 2016-04-05
CPC Classification: B64C,Y02T

Claim Text:
1. Pitching stabilization means for a rotary wing aircraft having at least one stationary stabilization surface extending in a thickness direction from a bottom face to a top face and in a longitudinal direction from a leading edge towards a trailing edge, at least one of the stabilization surfaces having at least one slot passing through the thickness of the stabilization surface from the top face to the bottom face, the slot being arranged within the stationary stabilization surface between the leading edge and the trailing edge so as to allow a flow of air coming from a rotor to pass from the top face towards the bottom face, wherein the at least one of the stationary stabilization surfaces includes at least one deflector for deflecting a stream of air passing through the slot, each deflector extending between the bottom face and the top face along the span of the airfoil surface in order to separate the slot into two compartments; wherein the deflector presents an airfoil profile, the deflector having a pressure side surface facing towards the trailing edge of the at least one of the stabilization surfaces and a suction side surface facing towards the leading edge of the at least one of the stabilization surfaces; and wherein the at least one slot remains open to the flow of air therethrough through a full range of motion of the at least one deflector.