Which statement best describes the generator system?

• A. Produces only DC power.
• B. Variable speed constant frequency power generator system supplying 115/200 vdc, 400 Hz, three phase electrical power; Supplies 28vdc power.
• C. Two AC sources powering all buses.
• D. A dedicated battery-only system.

Answer: (B)

The main idea here is how the Growler’s power plant keeps avionics and systems stable as you fly. It uses a variable speed constant frequency (VSCF) generator system. That means even though the engine speed varies, the generator’s output remains steady in both voltage and frequency. In practice, you get 115/200 VAC, three-phase power at 400 Hz for the aircraft buses, and you also have 28 VDC power available for essential DC loads. This combination is exactly what modern Navy aircraft rely on: stable AC power for the electrical system and a reliable DC supply for critical equipment.

So this is not a DC-only generator setup, nor are all buses fed by two separate AC sources, nor is it a battery-only system. The generator system provides the main aircraft power and also delivers the required DC power through the onboard paths, ensuring avionics and systems operate consistently across operating conditions.