6 Aircraft System II Flashcards
(157 cards)
Hydraulics are typically used on what aircraft components?
- Flying Controls
- Flaps
- Undercarriage
- Wheel brakes
Hydraulics are used to transmit ___ forces with rapid, _____ response to control demands.
HIGH forces
ACCURATE response
List some advantages of using hydraulics (5)
- Capable of transmitting very high forces
- Rapid and precise response to input signals
- Good power to weight ratio
- Simple and reliable
- Not affected by EM interference
Hydraulic fluid is what is known as an ________ fluid
INCOMPRESSIBLE
List some limitations and hazards of hydraulic fluid
- T______ and A___
- C____________
- F_________
- H______ L______
- Temperature and Aeration
- Contamination
- Flammability
- Hazardous Liquids
List the key components of the hydraulic system
- R______
- F______
- P___
- A_________
- V_____
- A______
- Reservoir
- Filters
- Pump
- Accumulator
- Valves (Pressure Control and Directional
- Actuator
What is the name of the engine or motor driven positive displacement pump that the majority of hydraulic systems use?
Rotary Swash Plate pump
What does PFCU stand for? (Hydraulics)
Powered Flying Control Unit
What are PFCUs (Powered Flying Control Units) predominantly used for?
Assist in controlled movement of larger surfaces to counter aerodynamic forces at higher speeds.
What does 3 REDS on the landing gear lights designate?
Unit is unlocked. Moving between up and down position
What does 3 GREENS on the landing gear lights designate?
Unit is locked down.
When the landing gear is LOCKED UP. What coloured lights will be shown?
NIL
No lights will be shown when the landing gear is locked up.
What can be used to provide an alternative power source in the hydraulics, in the event of an emergency?
Ram Air Turbine (RAT)
List some advantages of using hydraulics (5)
- Capable of transmitting very high forces
- Rapid and precise response to input signals
- Good power to weight ratio
- Simple and reliable
- Not affected by EM interference
Cabin pressure is typically controlled at _____ to _____ ft
6000-8000 ft
List some symptoms of Hypoxia at altitude
- Marked impairment to perform even simple tasks.
- Loss of critical judgement and willpower.
- General lack of awareness that impairment exists.
- Thinking is slowed
- Reduced muscle co-ordination
- Emotional changes. Garrulous, Euphoric or even violent.
- Possible blueness of lips, tongue, face and finger tips.
List some causes of Hyperventilation
- Anxiety, apprehension or fear
- Rise in body temp
- Whole body vibration 4-8 Hz
- Hypoxia
List some symptoms of Hyperventilation
- Tingling hands, feet and lips
- Vague feeling of unreality
- Light-headedness/dizziness
- Faintness
- Spasms of muscles in hands/feet
- Impaired performance
- Unconsciousness
What might give you ‘the bends’?
Decompression sickness
List some symptoms of Decompression Sickness
- Bends
- Effects on the skin
- Chokes
- Neurological affect
- Collapse
List some symptoms of Barotrauma
- Pain in ears, teeth and/or sinuses
- Deafness
- Ruptured eardrum
Why do we need pressurisation?
- To fly over high obstacles
- To climb above inclement weather
- To improve efficiency of turbo-fan engines
- To increase cruise speed
Cabin pressure is maintained around ___ to ___ ft
6000 to 8000 ft
Maximum climb rate of change of cabin altitude is ___ ft/min.
500 ft/min