AM.III.I.K8
KnowledgeComponents, theory, and operation of turbine engine fuel metering system.
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 › Engine Fuel System Components › Main Fuel Pumps (Engine Driven)
typical two-stage turbine engine driven pump is illustrated in Figure 2-60. The impeller, which is driven at a greater speed than the high pressure elements, increases the fuel pressure depending upon engine speed. The fuel is discharged from ... discharge port of the pump. This valve opens at a predetermined pressure and is capable of bypassing the total fuel flow. This allows fuel in excess of that required for engine operation at the time to be recirculated. The bypass…
- Chapter 2: Engine Fuel & Fuel Metering Systems › Turbine Engine Fuel System—General Requirements › FADEC Fuel Control Propulsion Engine
output driver banks that supply the control signals to engine components. Each channel of the EEC supplies the driver banks with control signals. The EEC has both volatile and nonvolatile memory to store performance and maintenance data ... control the engine thrust in two modes, which can be selected by use of a mode selection switch. In the normal mode, engine thrust is set with engine pressure ratio (EPR); in the alternate mode, thrust…