Systems Flashcards
The T-6B Engine is…
PT6A-68 Free turbine turboprop engine
The T-6B Engine can produce ____ SHP
1100
The gas generator of the T-6B engine is composed of…
A four stage axial flow compressor
A single stage centrifugal flow compressor (impeller)
Combustion chamber
Single stage compressor turbine
The power turbine of the T-6B engine is a ____ stage power turbine which drives the ____.
two, RGB
Oil system capacity
18.5 quarts
Primary function of the oil system
Constant supply of filtered oil to bearings, reduction gears, accessory drives, and propeller
4 components of the oil system
- Pressure
- Scavenge
- Cooler
- Breather
What does the pressure component of the oil system do?
Picks up oil from the tank
What does the scavenge component of the oil system do?
Two pumps return scavenged oil from bearings and gear box
How is oil cooled?
Scavenged oil is routed through an air cooler in the lower aft cowl assembly before returning to the tank.
What does the breather component of the oil system do?
Breather component maintains oil pressure in the oil tank via a breather valve and a centrifugal breather.
Oil px and temp are sensed by ______ located _______ of the main pump and the signal is sent to the _______.
Transducers, downstream, EDM
EDM and function
Engine Data Manager monitors engine operating parameters and illuminates the appropriate EICAS display when necessary.
SCU and its function
Signal Conditioning Unit. Provides oil indications to the EICAS and engine indications. Very sensitive
Red OIL PX
Oil px IDLE OR <15psi @IDLE
Amber OIL PX
Oil px 40-90psi (10sec) >IDLE OR 15-40psi @IDLE
Both Red & Amber OIL PX
15-40 @IDLE for 5sec or more
Red CHIP
Indicates oil contamination by ferrous material
Reduction gear box converts power turbine shaft speed (_____ RPM) to prop shaft speed (_____ RPM)
30,000-2,000
Np
Prop speed
PMU
Power management unit
PIU
Prop Interface Unit
PROP SYS Circuit Breaker is located… and powers the…
Located on the battery bus in the front cockpit.
Powers the feather dump solenoid.
FMU
Fuel Management Unit
PMA
Location?
Powers?
With how much Voltage?
Permanent magnet alternator
Mounted on RGB
Powers PMU
with 32 VAC
