Aircraft Systems Final Review
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What are two types of fluids?
What type of fluids create pressure?
How is hydraulic pressure created?
By the resistance in fluid movement
What are two basic systems in controlling hydraulic pressure?
- Pressure regualtor
- Relief valves
in a hydraulic system, what permits fluid to flow in one direction?
What are the three kinds of hydraulic actuators?
- Single Acting
- Double Acting
Which hydraulic actuator has instantaneous reversal capability?
What are the four enemies of hydraulic fluid?
What is the primary and secondary purpose of the electrical system?
- Primary: Ignite fuel/air mixture
- Secondary: Run the multitude of electrical equipment
What is the definition of AMPS and what do they measure?
The amount of electrons flowing through a conductor
They measure the flow rate or current
What is used to test an lead-acid battery?
What kind of electrical equipment is used in an aircraft?
What does the Ammeter indicate?
Provides information on current flow
What is the first thing you d when making a decision about load shedding?
Study the electrical load prior to flight.
What 2 heater systems are common in an aircraft?
- Combustion heater
- Exhaust manifold heater
What heater system in an aircraft is the simplest and lowest maintenance?
Exhaust manifold heater
What happens to the atmosphere as altitude increases?
pressure and temperature decrease
At what altitude does pressure stop decreasing?
What is the worst scenario for a pressurized aircraft?
Fatigue caused by a multitude of shorter flights
Which gauge indicates the difference in pressure outside the cabin and inside?
Cabin pressure differential gauge
What kind of supplemental oxygen is provided for passengers?
Continuous flow oxygen system
Twin engine aircraft share what on their vacuum system?
a common manifold
How should vacuum system filters be cleaned?
Replace them, dont clean them
How do you minimize heat on tires?
- Proper inflation
- Taxi slow as practical
- Keep ground maneuvering to a minimum
- reduce/eliminate braking
- operate as slow and safely as possible
When does hydroplaning occur?
When taking off or landing on surface with still water deeper than tread depth of tires
Which type of hydroplaning involves turning water to steam?
Reverted Rubber Hydroplaning
What piece of equipment keeps landing gear pointed straight?
What prevent inadvertent gear retraction on the ground?
- Landing gear safety devices
- Mechanical down locks
- Saftey Switches
- Ground locks
What are the functions of an anti skid system?
- Normal skid control
- Locked Wheel skid control
- touchdown protection
- fail safe protection
What are two types of forced air induction systems?
- Turbo charger
- Super charger
What are two main sections of a turbo charger?
Does a turbo charger increase fuel efficiency and does is create more stress on the engine?
What is key to the longevity of an engine or turbo?
What is the most common reason turbo chargers fail?
Lack of lubrication
How much less does a turbine engine weigh compared t a reciprocating engine?
How fast does the compressor on a turbine engine spin?
What makes a turbine engine practically vibration free?
- All four stages happen together
- (intake, compression/combustion, power, exhaust)
How is power measured for a turbine and reciprocating engine?
- Turbine: ibs of thrust
- Reciprocating: Horsepower
how much power in a turbo prop engine derives from thrust?
How much thrust does a turbo prop engine get from exhaust?
What is axial flow named for?
for how the air flows through the compressor
What are 4 advantages of a fixed shaft turbine rotor?
- shaft goes directly to compressor and then to reduction gearbox and prop shaft
- provides rapid reverse thrust
- provides controlled descents- no windmilling over speed
- instantaneous power response
What are 4 advantages of a free turbine rotor?
- Prop can be stopped without shutting down engine
- low prop speed during taxi
- easier engine stating
- better control of prop speed
What principle does the TKS weeping wing de-icing system work off of?
freezing point depressant concept
What class of system was the airborne laser system?
Was the airborne laser system a manual system?
No, automatic system
Is the airborne laser system still being developed?
No, it was too expensive
How does the cyclic work?
The control for changing the pitch of each rotor blade individually
How does the collective work?
collective changes the pitch angle of all the main rotor blades collectively
What other component changes the pitch of the blades?
Do helicopters use a constant rotor speed?
What is the primary and secondary purpose of a rotor brake?
- Primary: Slow rotor down
- Secondary: Keep rotor from spinning on ground
What are the two types of a rotor brake system?
What brake system is used an a rotor brake system?
How much power goes to the tail rotor system?
a "fan in tail" system is referred to as?
What does the NOTAR anti torque system utilize?
On an AH-64, what is the name of the machine gun, rocket launcher, and what does it fire? also
- M261 Rocket Launcher
- AGM-114 Hellfire missiles
- M230 Chain gun
What is the primary hook called on an external load device?
Who regulates the use of a belly hook?
What are four primary types of float designs?
- Fixed utility
- Boat haul design
- Pop-out floats
- Limited water capability
What are 3 main types of rotor systems?
- fully articulated
How many GPS satellites are out there?
Who where they designed for?
How fast does signal travel?
How many satellites are required to get a good signal?
- US Government for military navigation
- Speed of light
- minimum of 3
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