How does the governor prevent unwanted rotor speed conditions in the TH-73A?

• A. By adjusting fuel mixture
• B. By controlling the pitch of the rotor blades
• C. By regulating the throttle output
• D. By increasing engine RPM

Answer: (B)

In the TH-73A, the governor plays a crucial role in managing rotor speed by controlling the pitch of the rotor blades. The primary function of the governor is to ensure that the rotor system maintains the correct speed during various flight conditions. When the rotor speed is either too high or too low, the governor adjusts the collective pitch of the rotor blades to compensate.

By increasing the pitch when rotor speed rises, the governor increases drag, effectively reducing rotor speed. Conversely, if rotor speed drops, the governor decreases the pitch, allowing the rotor to speed up. This automatic adjustment helps maintain consistent rotor performance and contributes to stable flight characteristics, ensuring safety and efficiency during operations.

While adjusting fuel mixture, regulating throttle output, and increasing engine RPM can affect engine performance, they are not the primary mechanisms through which the governor maintains rotor speed. The focus is specifically on rotor blade pitch control for managing rotor speed effectively in flight.