What is the primary function of an airspeed indicator?

The primary function of an airspeed indicator is to indicate the aircraft speed. This instrument measures the dynamic pressure of the air passing over the aircraft and displays it in terms of speed. Understanding airspeed is essential for safe flight operations, as it allows pilots to maintain proper control of the aircraft during different phases of flight, such as takeoff, cruising, and landing.

Airspeed is crucial for various reasons, including determining the aircraft's stall speed, ensuring safe maneuvering during flight, and optimizing fuel efficiency. Consequently, knowledge of airspeed directly impacts flight safety and performance. Balancing speed with lift and drag is a fundamental aspect of flying.