What is the principal function of a governor in a constant-speed propeller?

What is the principal function of a governor in a constant-speed propeller?

• A. To Increase Engine Torque
• B. To Adjust Blade Pitch To Maintain RPM
• C. To Change Rotor Speed By Manual Input
• D. To Adjust Engine Fuel Flow

Answer: (B)

A governor in a constant-speed propeller automatically keeps the propeller running at a chosen RPM by changing blade pitch. It monitors the propeller speed and, when speed tends to rise, increases blade pitch to add drag and slow it down; when speed tends to fall, it decreases blade pitch to reduce drag and let the speed rise back toward the set value. This automatic pitch adjustment maintains a steady engine load and stable operation under varying flight conditions. The governor doesn’t directly increase engine torque, isn’t operated by manual input to change rotor speed, and doesn’t control engine fuel flow—its primary job is to regulate RPM through blade angle.

A governor in a constant-speed propeller automatically keeps the propeller running at a chosen RPM by changing blade pitch. It monitors the propeller speed and, when speed tends to rise, increases blade pitch to add drag and slow it down; when speed tends to fall, it decreases blade pitch to reduce drag and let the speed rise back toward the set value. This automatic pitch adjustment maintains a steady engine load and stable operation under varying flight conditions. The governor doesn’t directly increase engine torque, isn’t operated by manual input to change rotor speed, and doesn’t control engine fuel flow—its primary job is to regulate RPM through blade angle.