A high-lift device is like a magical tool that helps airplanes fly better by changing the shape of their wings. You know how when you play with paper airplanes, you fold the wings up or down to make them fly better? Well, high-lift devices work the same way!
When an airplane is at takeoff or landing, it needs extra lift to stay in the air, especially if it's carrying a lot of passengers or cargo. High-lift devices help create more lift by changing the shape of the airplane's wings.
There are different types of high-lift devices, but the most common ones are called flaps and slats. Flaps are located on the back of the wing and move down, creating more curve to the wing's surface. Slats are located on the front of the wing and move forward, creating a gap or opening in the wing's leading edge. By doing this, they allow air to flow more smoothly over the wing, which helps to create lift.
So, by using high-lift devices, airplanes can take off and land at lower speeds and shorter distances, making them safer and more efficient. It's basically like giving an airplane a little boost to help it fly better!