AGK Systems Flashcards
A basic hydraulic system contains
A piston
Source of powe
Hydraulic lines
Hydraulic reservoir
Active hydraulic system
Uses pumps
Passive hydraulic system
Uses human effort
Selector vales
Direct fluid to either side of an actuator
Constant pressure pump
Uses swash plate
Spur gear pump
Pressure depends on RPM
Relief valve
Vents excess pressure
Restrictor valve
Restricts
eg in gear up line
Priority valve
Maintains pressure to one part of the system
Shuttle valve
Always supplies from the highest power source
Fuses
Automatically cut off
Drag strut
For and aft movement
Side stay
Side loads
Red light on gear indicates
Unlocked or travelling
Open and closed centre hydraulic system
Open centre only when hydraulic power in needed
Closed centre always powered eg large aircraft
Bleed air is
Off for engine start
Electromechanical/ Rosemount ice detector
Vibrates and senses frequency change
Mechanical ice detector
Uses pressure change as a tube becomes blocked
Electrical
Senses a voltage difference
Types of smoke detection
Optical - smoke refracts light
Ionising - smoke is ionised allowing current to flow
Fire protection principle
Positive coefficient of capacitance
Negative coefficient of resistance
Pax oxygen masks automatically deply
15,000ft id exceeded
Oil and grease kept away from oxygen system because
Fire risk
