What is the main purpose of the airspeed indicator in helicopter cockpit instrumentation?

• A. To measure fuel flow
• B. To indicate horizontal speed
• C. To assess engine temperature
• D. To track rotor speed

Answer: (B)

The primary function of the airspeed indicator in a helicopter cockpit is to provide the pilot with information about the aircraft's horizontal speed relative to the surrounding air. This is crucial for safe operations, as it helps the pilot understand the helicopter's performance and control during various phases of flight, including takeoff, cruising, and landing.

The airspeed indicator measures dynamic pressure and converts it to a readable format, allowing pilots to gauge how fast they are moving through the air. This measurement is essential for maintaining safe flight operations, determining how much lift the rotor is generating, and making informed decisions regarding flight maneuvers.

While other instruments in the cockpit serve specific purposes, such as measuring fuel flow, engine temperature, or rotor speed, they do not fulfill the critical role of indicating the helicopter’s speed through the air, which is vital for efficient and safe flight management.