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21 Cards in this Set
- Front
- Back
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Name 6 types of turbine accessories |
Oil pump Hydraulic pump Fuel pump FCU Tachometer Generator Starter |
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Purpose of fuel control unit |
Determines the amount of fuel to air ratio depending upon different environments or aircraft configurations |
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Describe the effect of engine shut down on feathering prop |
Oil pump stops operating. Oil drains away from feathering spring, counterweights being blade back to feather |
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5 forces acting on a prop |
Centrifugal Force Thrust bending force Torque bending force Aerodynamic twisting moment Centrifugal twisting moment |
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Describe governor in overspeed |
Flyweights go out due to centrifugal force Lifts speeder spring up Oil drains from piston, blade does more coarse slowing the blade down Flyweights reach equilibrium with spring |
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Name 6 components in basic aircraft fuel system |
Fuel tank Dump system Vent system Strainer Dip stick Jet pump Check valves Pressure refuel system Fuel filter Boost pump |
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3 components of basic engine fuel system |
High pressure pump Low pressure pump FCU Filter Fuel heater Fuel fowmeter |
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How does a hydrolic accumulator work? |
Uses a compressible medium (such as a gas) to store pressure |
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Two purposes of aircraft wheels |
Provides shock absorbing Adequate adhesion on runway for braking and cornering Reduce taxi rolling drag to a minimum |
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Describe operation of a shock strut/oleo |
Piston Piston tube Metering pin Torsion/scissor lift Orifice
Pressure increases on wheel. Strut is forced through metering orifice causing the nitrogen to compress, dampening and then restores the balance |
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How does a water separator work? |
Air moves through a polyester bag which collects water mist from air. Separator has slots that move the air in a circular motion and collects the water by centrifugal force |
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Describe the water vapour cycle |
CCEEF |
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Purposes of pressurisation |
Provide crew and passenger comfort Prevents rapid changes in pressure altitude Provide reasonably fast exchange of air |
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3 purposes of aircraft pressurisation safety valve |
Set slightly higher than max diff as back back up Negative pressure relief Emergency depress |
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Purpose of battery and RAT |
Provide emergency or backup power. GPU provides auxiliary power |
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What does a RCCO do? |
Disconnects the generator when battery out put exceeds generator outputs. Stops the battery from powering the generator. |
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What is a momentum separator |
Anti ice measure Moisture cannot make the 180 degree turn that air does in a reverse flow engine |
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What type of servicing ensures daily operations? |
OLM Operational level servicing |
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Component that regulates cabin pressure |
Outflow valve |
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What component prevents the maximum pressure differential being reached? |
Negative pressure relief valve |
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Describe the operation of a jet pump |
Jet pump uses a Venturi and motive foe to draw fuel from the tank |
