---
title: "Why aircraft need flaps — OnlyPlanes"
description: "The flaps increase lift at low speed and help to take off and land. How they change resistance and why they are removed in stages."
canonical_url: "https://onlyplanes.ru/en/guides/flaps"
locale: en
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  "og:description": "How high-lift devices help aircraft take off and land at lower speeds."
  "og:image": "https://onlyplanes.ru/images/aviation/aircraft/boeing-787.webp"
  "og:title": "Why aircraft need flaps"
---

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Flight explained

# Why aircraft need flapsWhy aircraft need flaps

How high-lift devices help aircraft take off and land at lower speeds.

The short answer

The flaps extend from the rear edge of the wing and change its curvature, and in some modes increase the effective area. The wing creates more lift at the lower speed required for takeoff and landing.

## How flaps change lift and speed

Increasing the lifting force has a price - the resistance is growing. On takeoff, the flaps are released moderately, and on landing, a greater deviation is used, which additionally helps to descend without acceleration.

After breaking off and dialing a safe speed, the crew removes the mechanization in stages. Sharp cleaning would reduce lifting power, so each step is associated with a given speed.

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