AM.III.I.K1
KnowledgeFuel/air ratio and fuel metering, and carburetor theory and operation.
From the FAA library
- Chapter 2: Engine Fuel & Fuel Metering Systems › Basic Fuel System
During starting, the boost pump forces fuel through a bypass in the engine-driven pump to the metering device. Once the engine-driven pump is rotating at sufficient speed, it takes over and delivers fuel to the metering device ... specified pressure. The airframe fuel system begins with the fuel tank and ends at the engine fuel system. The engine fuel system usually includes the engine-driven pumps and the fuel metering systems. In aircraft powered with a reciprocating engine…
- Chapter 2: Engine Fuel & Fuel Metering Systems › Fuel Control Maintenance › Fuel System Operation
Water Injection System Fuel Control Maintenance Fuel System Operation The fuel pump receives fuel from the airplane fuel system. The low pressure boost stage of the pump pressurizes the fuel and sends it to the fuel/oil cooler (FOC). The fuel ... flows from the FOC, through the fuel pump filter element, and then to the high pressure main stage of the pump. The high pressure main stage increases the fuel pressure and sends it to the fuel metering unit…
- Chapter 2: Engine Fuel & Fuel Metering Systems › Fuel Metering Devices for Reciprocating Engines › Air-Fuel Mixtures
Air is free and available in limitless quantities. The object is to obtain the required power with the least fuel flow. A measure of the economical use of fuel is called specific fuel consumption (SFC), which is the fuel weight ... pounds per hour per horsepower. By using this ratio, the engine’s use of fuel at various power settings can be compared. When leaning below 0.067 air-fuel ratio with constant airflow, even though the power diminishes, the cost…