15.17, 15.18, 15.19 Flashcards
(23 cards)
What use turbo shaft engine
APU
helicopter
Control devices found on helicopter
Collective stick
How is APU accelerated to 100% RPM
Starter stops at 35%
Requires ignition up to 95%
What non aviation machines use turbo shaft
Boats , tanks
Do turbo shaft engines produce thrust
Some do up to 10%
Type of engine of APU
Turbo shaft engine
What services does APU provide
Electrical and pneumatic
Electric and pneumatic altitude uses
Sea lever to 10,000 ft both electric and pneumatic
10,000 to 17,000 ft either electric or pneumatic ( not both )
17,000 to 35,000 electric only
When does APU reach self sustaining speed
95% RPM
Purpose of APU de oiling valve
Help improve APU start , reduces load on starter motor
Type of compressor used on APU
Centrifugal
How is fuel controlled on APU
FCU ( fuel control unit )
What happens when APU is in overspeed condition
It will shut down automatically
Does APU need CSD
NO
Which fuel tank does APU use
Main fuel tank
What are fireproof bulkheads made of
Stainless steel , titanium, thermoplastic
2 main lifting points of engine
Both on top of engine
One attached to fan case and one attached to turbine frame
Where are flexible lines used
High vibration areas
How to get rid of fuel after wet start
Excess fuel will gather at bottom of tank and drain valve is spring loaded open and fuel will drain safely
Bootstrap system
Type of self contained lifting kit used to handle the lowering and raising of the engine
What’s a power plant
Fully equipped engine
What are stub wings
Side pylons for rear fuselage mounting
How is diameter of flexible and rigid ripe measured
Flexible = inside Rigid = outside
