What does indicated airspeed (IAS) represent?

Indicated airspeed (IAS) represents the speed displayed on the airspeed indicator located within the cockpit of the aircraft. IAS is crucial for pilots because it provides an immediate and visual means of assessing the aircraft's current operational speed relative to the surrounding air. This reading is essential for determining how the aircraft is performing during various phases of flight, such as takeoff, landing, and maneuvers.

The airspeed indicator measures the dynamic pressure from the airflow around the aircraft and translates that into a speed reading. It does not account for factors such as altitude or temperature, which can affect the air density and, consequently, the aircraft’s performance.

Understanding IAS is fundamental for ensuring safe flight operations, as it helps pilots maintain appropriate speeds to prevent stalling and other aerodynamic issues.