What is an advantage of a constant-speed propeller?

• A. allows engine to run at maximum power continuously
• B. permits the pilot to select the blade angle for the most efficient performance
• C. reduces weight and balance considerations
• D. eliminates the need for throttle changes

Answer: (B)

A constant-speed propeller lets you optimize efficiency by controlling the blade pitch while the governor keeps the engine RPM near a set value. The main advantage is that you can choose the blade angle to suit the flight conditions and desired performance, and the propeller automatically adjusts pitch to maintain that RPM as load and airspeed change. This means you can tailor your climb, cruise, or takeoff performance to be as efficient as possible across a wide range of speeds and power settings. It doesn’t force maximum power all the time, it doesn’t change weight and balance, and throttle changes are still used to set power—the governor simply adjusts pitch to hold the selected RPM.