Which of the following is a function of the engine control system?

• A. To keep the rotor speed constant under all operations.
• B. To maximize fuel efficiency at all times.
• C. To monitor cabin temperature.
• D. To regulate landing gear extension.

Answer: (A)

Engine control systems are built to keep the engine running at a chosen speed by automatically controlling fuel delivery based on the actual rotor speed. Sensors feed the control unit, which modulates fuel flow (and other parameters as needed) to hold the rotor at the commanded speed as loads and throttle settings change. This helps the engine respond smoothly to different power demands and prevents overspeed or instability. While improving efficiency is a goal, the system prioritizes maintaining the target speed and safe operation rather than maximizing fuel economy at every moment. Cabin temperature and landing gear function come from other subsystems, so they aren’t responsibilities of the engine control system.