Final answer:
The fuel system computer unit (FSCU) automatically controls the transfer of fuel in aircraft to balance weight distribution and optimize fuel usage.
Step-by-step explanation:
The fuel system computer unit (FSCU) plays a critical role in modern aircraft by automatically controlling the transfer of fuel between the tanks to maintain the aircraft's balance and to ensure optimal fuel usage. The FSCU interfaces with various sensors and systems within the aircraft to monitor fuel levels and control the fuel pumps and valves accordingly. It ensures that fuel is efficiently used and that the center of gravity of the aircraft remains within specified limits for safe operation. For example, during a flight, the FSCU might transfer fuel from the wing tanks to the central tank to keep the aircraft balanced, especially as fuel is consumed and the weight distribution changes.