What is a primary function of flaps during takeoff?

The primary function of flaps during takeoff is to increase lift at lower speeds. Flaps achieve this by altering the shape of the wing, thereby enhancing the airflow over the wing at slower velocities. This is crucial during takeoff since aircraft need to become airborne at lower speeds than they do during cruising. By deploying the flaps, the wing can generate the necessary lift to allow the aircraft to achieve flight without requiring a higher airspeed.

This increased lift is particularly important when operating from shorter runways or in heavy aircraft configurations, where every bit of additional lift can significantly influence takeoff performance. The enhancements in lift provided by the flaps allow for a shorter takeoff distance and a safer ascent during this critical phase of flight.