What is the primary function of the pitot heat system in a TH-73?

What is the primary function of the pitot heat system in a TH-73?

• A. To increase engine efficiency
• B. To prevent icing on the pitot tube
• C. To enhance cabin comfort
• D. To regulate fuel flow

Answer: (B)

The primary function of the pitot heat system in the TH-73 is to prevent icing on the pitot tube. The pitot tube is essential for measuring airspeed; however, it is susceptible to ice buildup, particularly in colder temperatures or in conditions with high humidity. When ice forms on the pitot tube, it can lead to inaccurate readings or total failure of the airspeed indicator, which is critical for safe flight operations. The pitot heat system operates by using electrical heating elements that warm the pitot tube, maintaining it at a temperature above freezing. This preventative measure ensures that the air pressure readings from the pitot tube remain accurate, thereby contributing to the overall safety and functionality of the aircraft. The other options do not align with the specific role of the pitot heat system. Increasing engine efficiency, enhancing cabin comfort, and regulating fuel flow pertain to different systems and components of the helicopter's overall design and operation, rather than the specific function of maintaining the integrity of the pitot tube against icing.

The primary function of the pitot heat system in the TH-73 is to prevent icing on the pitot tube. The pitot tube is essential for measuring airspeed; however, it is susceptible to ice buildup, particularly in colder temperatures or in conditions with high humidity. When ice forms on the pitot tube, it can lead to inaccurate readings or total failure of the airspeed indicator, which is critical for safe flight operations.

The pitot heat system operates by using electrical heating elements that warm the pitot tube, maintaining it at a temperature above freezing. This preventative measure ensures that the air pressure readings from the pitot tube remain accurate, thereby contributing to the overall safety and functionality of the aircraft.

The other options do not align with the specific role of the pitot heat system. Increasing engine efficiency, enhancing cabin comfort, and regulating fuel flow pertain to different systems and components of the helicopter's overall design and operation, rather than the specific function of maintaining the integrity of the pitot tube against icing.