Patent ID: 9010692
Filing Date: 2015-04-21
Classification: B64C

Abstract:
1. 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; a concave part that is formed on the slat main body at a location that faces the main wing, so as to be able to accommodate at least a part of a leading edge of the main wing; and a lower-surface plate that is a plate member extending along an extended line of a lower surface of the slat main body toward the main wing from an edge line at which the lower surface of the slat main body and the concave part meet when the slat main body is extended from the main wing, wherein the lower-surface plate is configured to be able to deflect an angle thereof with respect to a central axis of the slat main body, at a trailing edge of the lower-surface plate, saw-shaped serrations are provided along a longitudinal direction of the lower-surface plate, and when the angle of lower-surface plate is deflected upwardly with respect to the central axis of the slat main body, the lower-surface plate deflects a direction of a separated air upwardly, and the serrations weaken a shear layer of the separated air.