What is the purpose of spoilers on an aircraft?

The purpose of spoilers on an aircraft is to increase drag during landing. When deployed, spoilers disrupt the airflow over the wings, which reduces lift and increases drag. This action allows the aircraft to descend more steeply and decrease its speed more effectively during the landing phase. By increasing drag, spoilers help to ensure a shorter landing distance and more controlled descent, which is crucial for safely bringing the aircraft to a stop on the runway.

In addition to landing, spoilers can also be used during flight to assist with descent and control, but their primary utility in landing scenarios is to manage speed and lift efficiently. This functionality makes them an essential component of flight operations, particularly during landing approaches where control and precision are key.