Powerplant Systems & Components: Engine Instrument Systems 🔊 Flashcards
What are the units in an engine fuel flow system?
A transmitter and an indicator for each engine
Where is the fuel flow transmitter located?
Mounted in the fuel line between the engine driven pump and the carburetor
What type of readout is indicated on a fuel flow system?
The indicator is calibrated to record the fuel flow in pounds per hour
What exactly does a mass fuel flow transmitter measure?
Density mass of the fuel that flows through it
What is the reason for monitoring the fuel flow?
Fuel consumption and the operator is able to determine whether the engine is operating at the correct fuel-air mixture for a given power setting
What does a manifold pressure gauge indicate?
Absolute pressure in the intake manifold
What would be the effect of a broken manifold pressure gauge line?
The gauge will indicate atmospheric pressure
What does the engine tachometer indicate?
Crankshaft speed (RPM)
What is the most likely cause of an oscillating tachometer?
Kink in the cable
What type of tachometer is used in multi-engine airplanes?
Alternating current tachometer generators
What are turbine engine tachometers designed to indicate?
Percent engine rotor (shaft) RPM
What is the EPR on a turbine engine?
Ratio between total turbine discharge pressure to total inlet pressure; an indication of thrust being developed by the engine
What is the electric source for a cylinder head temperature gauge?
A thermocouple attached to the cylinder head
Where is a carburetor air temperature bulb located?
The air intake passage to the engine
How can a turbine engine EGT be checked without operating the engine?
Checking resistance to thermocouples and circuits
