15.10, 15.7, 15.9 Flashcards
Describe a heat pump
Gas drive gear and a driven gear ( most common )
Filter clog indicator
“Pop out” on filter housing
Difference in cold tank and hot tank
Cold= scavenge lines Hot= pressure lines
What’s used to detect ferrous debris in oil system
Magnetic chip detector
3 sub systems of lubrication system
- supply and pressure
- scavenge
- vent systems
3 oil pumps
Vane , gear , gerator
What way does oil in a filter flow
“ out to in”
Where are chip detectors located
Before the inlet to each scavenge pump
Or in oil tank
Cooling medium used for oil coolers
Air or fuel or both
Purpose of a vent system
Ensure proper flow to bearings
Pressure and velocity in convergent duct
Pressure increase velocity decrease
Main parts of the exhaust
Exhaust cone, tailpipe , exhaust nozzle
Purpose of exhaust cone
Collects gas from turbine and passes it through its converging structure which decreases the airflow velocity but increases pressure , it also protects the rear face of turbine disc from high temperatures
What engines have shorter exhaust ducts
Turbo fan engines
Exhaust ducts used in supersonic aircraft
CD duct used
