Where is the pitot-static probe installed on the TH-73A helicopter?

• A. Top of the helicopter cabin
• B. Bottom of the helicopter cabin
• C. Front nose of the helicopter
• D. Side of the helicopter fuselage

Answer: (B)

The pitot-static probe on the TH-73A helicopter is installed on the bottom of the helicopter cabin. This location is chosen to ensure accurate measurement of atmospheric pressure and dynamic air pressure as the helicopter flies. The probe must be positioned where it can receive undisturbed airflow to function effectively, avoiding turbulence that could arise from other parts of the aircraft.

Installing the probe on the bottom of the cabin helps minimize the impact of rotor wash and other airflow disturbances that could result from the helicopter's own movement. This placement ensures that the readings used for instruments such as the airspeed indicator and altitude measurement are reliable, contributing to safe flight operations. The specific design of the TH-73A incorporates such considerations to enhance its performance and safety in various flight conditions.