Airplanes use high lift devices to allow them to fly at lower speeds without getting close to a stall. This is essential for safe takeoffs and landings where the aircraft needs to be slowed down significantly. Each aircraft has a wing that is designed for a purpose. A light general aircraft has straight wings, which are excellent at generating lift at low speeds. However, larger faster going aircraft are designed with swept wings. These wings outperform straight wings at high speeds but falter at low speeds. Due to this reason, these wings require more help when compared to straight wings at low speeds and low altitudes.
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