Patent ID: 8469316

Claim:
A high-lift device comprising: a slat main body that is disposed so as to be able to extend from and retract into a main wing, the slat main body including: a leading edge that is disposed at an air upstream end of the slat main body; a lower surface that extends smoothly from the leading edge of the slat main body; an upper surface that extends smoothly from the leading edge of the slat main body, the upper surface projecting further from the leading edge than the lower surface; and a concave part that faces the main wing and is able to accommodate at least a part of a leading edge of the main wing; and an airflow control part that is disposed at an area of the concave part adjacent to a rear side of the upper surface of the slat main body, the airflow control part being accommodated between the main wing and the concave part when the slat main body is retracted into the main wing, and the airflow control part suppressing turbulence colliding against the area of the concave part adjacent to the rear side of the upper surface of the slat main body when the slat main body is extended from the main wing, wherein the airflow control part comprises a plate that is provided at the area of the concave part adjacent to the rear side of the upper surface of the slat main body, wherein the plate has a pivotal end and another end, the pivotal end being located closer to the main wing than the another end, the pivotal end being pivotably supported at the slat main body, and the plate having an angle that is adjustable with respect to a central axis of the slat main body, and wherein the another end of the plate is positioned so as to not interfere with the leading edge of the main wing and so as to not to impair aerodynamic characteristics when the slat main body is retracted into the main wing, and the another end of the plate is moved downward with respect to the central axis of the slat main body when the slat main body is extended from the main wing.