High lift devices are important components in aviation. They can be movable surfaces or sometimes stationary parts that help increase lift during specific phases of flight. Most often, these devices are used during takeoff, initial climb, and the approach and landing phases. However, they can also play a role in any low-speed situation. By adding high lift devices, aircraft designers can create wings that are smaller and have less surface area. This design reduces drag and improves fuel efficiency during cruising. Common examples of high lift devices include flaps, slats, and Krueger flaps. There are also less common options, like leading edge root extensions found on high-performance fighter aircraft and boundary layer control devices, including blown flaps.
