What happens when flaps are used during takeoff?

Using flaps during takeoff significantly alters the aerodynamic characteristics of an aircraft. When flaps are extended, they effectively increase the surface area of the wings and change their shape, which results in an increase in lift at lower speeds. This is particularly beneficial during takeoff, as it allows the aircraft to become airborne at a lower airspeed, enhancing safety margins and improving performance.

While the increase in lift is advantageous, it's essential to note that the use of flaps also leads to an increase in drag. The aerodynamic changes brought about by the flaps can create additional resistance as the aircraft moves through the air. Therefore, while the primary benefit of using flaps during takeoff is the increase in lift—allowing for earlier liftoff—the accompanying increase in drag must also be considered, especially regarding engine performance and climb rates.

This dual effect—boosting lift while generating more drag—highlights the importance of managing flap settings effectively to optimize takeoff performance while maintaining control of the aircraft.