triple slotted flap

triple slotted flap

triple slotted flap
A type of high-lift device to reduce the takeoff or landing speed by changing the lift characteristics of a wing during the takeoff or landing phases. Triple slotted flaps extend downward and rearward away from the wing in three sections. The trailing edge of one section forms a duct with the leading edge of the section behind it to force air down over the top of the flap. Triple slotted flaps prevent the flow of air from separating from the surface of the flap when they are fully extended. When not in use, the flaps are flush with the wing.