A system includes at least one upper flexible skin intended to be fixed in the extension of an upper plane of the wing, a lower flexible skin intended to be movable in the extension of a lower plane of the wing and fixed along a trailing edge of the control surface, an actuator for generating a displacement of the lower flexible skin with respect to the lower plane. The displacement causes a curvature of the first, upper flexible skin and a curvature of the second, lower flexible skin having a concavity oriented in a same direction. The control surface system makes it possible to reduce the quantity of energy supplied by the actuator.

A system and method for lift augmentation of an aircraft having a wing with a leading edge and a trailing edge extending along a wingspan, a plurality of thrust-producing devices connected to the bottom of said wing, at least one flap connected to an inboard portion of said wing proximate the trailing edge, and an aircraft roll control device connected to said wing, wherein the improvement comprises a plurality of slipstreams associated with a plurality of thrust producing devices and a flap adaptable to deflect from a chord of the inboard portion of the wing.

A system and method for lift augmentation of an aircraft having a wing with a leading edge and a trailing edge extending along a wingspan, a plurality of thrust-producing devices connected to the bottom of said wing, at least one flap connected to an inboard portion of said wing proximate the trailing edge, and an aircraft roll control device connected to said wing, wherein the improvement comprises a plurality of slipstreams associated with a plurality of thrust producing devices and a flap adaptable to deflect from a chord of the inboard portion of the wing.

A method and apparatus for positioning a control surface. An apparatus comprises an arm, first link, and second link. The arm has first and second ends, the first end of the arm rotatably coupled to a wing structure to define a first pivot point. The first link has first and second ends, the first end being rotatably coupled to the second end of the arm. The second link has first and second ends, the first end rotatably coupled to the first end of the arm. When the second end of the first link is rotatably coupled to a first control surface and the second end of the second link is rotatably coupled to a second control surface, movement of the first control surface away from the wing structure rotates the arm about the first pivot point such that the second control surface moves in coordination with the first control surface.

A method and apparatus for positioning a control surface. An apparatus comprises an arm, first link, and second link. The arm has first and second ends, the first end of the arm rotatably coupled to a wing structure to define a first pivot point. The first link has first and second ends, the first end being rotatably coupled to the second end of the arm. The second link has first and second ends, the first end rotatably coupled to the first end of the arm. When the second end of the first link is rotatably coupled to a first control surface and the second end of the second link is rotatably coupled to a second control surface, movement of the first control surface away from the wing structure rotates the arm about the first pivot point such that the second control surface moves in coordination with the first control surface.

A simple, safe, and inexpensive flight control system in an aircraft. An anti-torque system for a rotary-wing aircraft has an airfoil with a first surface extending from a first trailing edge and a leading edge, and a second surface extending from a second trailing edge to join the first surface at the leading edge. The airfoil has a first moveable deflector panel pivotally coupled to the first trailing edge, and a second moveable deflector panel pivotally coupled to the second trailing edge. Means are provided to pivot the deflector panels in unison about their respective pivot axes to alter the direction of travel of the airflow downstream of the pivot axes over the surfaces of the deflector panels, thereby producing a lift in a direction perpendicular to the airflow to counteract the torque applied on the aircraft. The flight control system may be arranged within a fixed-wing aircraft.

A simple, safe, and inexpensive flight control system in an aircraft. An anti-torque system for a rotary-wing aircraft has an airfoil with a first surface extending from a first trailing edge and a leading edge, and a second surface extending from a second trailing edge to join the first surface at the leading edge. The airfoil has a first moveable deflector panel pivotally coupled to the first trailing edge, and a second moveable deflector panel pivotally coupled to the second trailing edge. Means are provided to pivot the deflector panels in unison about their respective pivot axes to alter the direction of travel of the airflow downstream of the pivot axes over the surfaces of the deflector panels, thereby producing a lift in a direction perpendicular to the airflow to counteract the torque applied on the aircraft. The flight control system may be arranged within a fixed-wing aircraft.

An aircraft wing incorporating an active flow control (AFC) device The AFC device comprises a fluid chamber housed in the wing providing a conduit for receiving fluid and accommodating the fluid at elevated pressure. Forward and rearward fluid channels having respective inlets and outlets are also provided, wherein the inlets are in fluid communication with the fluid chamber and the outlets emerge on the upper surface of the wing at or adjacent the leading edge. A valve assembly allows the channels to be opened and closed as desired. During flight, fluid at elevated pressure can be supplied to the fluid chamber and released through either the forward or the rearward fluid channel or both, so as to influence the air flow, e.g., to reduce or increase lift, or to equalize pressure in the air stream direction.

An aircraft wing incorporating an active flow control (AFC) device The AFC device comprises a fluid chamber housed in the wing providing a conduit for receiving fluid and accommodating the fluid at elevated pressure. Forward and rearward fluid channels having respective inlets and outlets are also provided, wherein the inlets are in fluid communication with the fluid chamber and the outlets emerge on the upper surface of the wing at or adjacent the leading edge. A valve assembly allows the channels to be opened and closed as desired. During flight, fluid at elevated pressure can be supplied to the fluid chamber and released through either the forward or the rearward fluid channel or both, so as to influence the air flow, e.g., to reduce or increase lift, or to equalize pressure in the air stream direction.

A lift-changing mechanism is configured to change generated by a wing of an aircraft and includes a slit and an opening and closing member. The slit extends in a wingspan direction inside the wing and forms openings on the lower surface of the wing and on the upper surface of the wing respectively. A part of airflow below the lower surface is allowed to flow toward the upper surface through the slit. The opening and closing member is configured to open and close the slit. When the opening and closing member opens the slit, lift generated on the wing is decreased compared with when the slit is closed.