The mechanical fuel gauge is a simple device found in the old aircraft models. The disadvantage of mechanical Fuel Gauges is that there are too many moving parts that can get stuck or jam up due to the aircraft's movement and vibration.Electrical Airplane Fuel Gauge is also known as capacitance meter and uses a capacitor, an electrical amplifier and a fuel gauge to give a reading of Aircraft Fuel Flow indicator in the tanks. The capacitor stores an electric charge, the size of the dielectric which is either the fuel in the tank when full or the air in the tank when it's empty.
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