7. Aircraft Hydraulic Systems Flashcards
1
Q
What is the purpose of hydraulic systems?
A
Transformation, distribution and utilisation of mechanical energy through use of incompressible fluid at high pressure
2
Q
Generation, transformation and regulation in the structure of hydraulic systems
A
- pumps
- valves
- hydro-accumulators
3
Q
Distribution in the structure of hydraulic systems
A
- pipes
- fittings
- control and command valves
4
Q
Positive aspects of hydraulic systems
A
- high efficiency
- great flexibility
- high reliability
- ease of control
5
Q
Negative aspects of hydraulic control
A
- Non fire resistant fluids
- difficulty in synchronising actuators
- possibility of malfunction
6
Q
Hydraulic systems on board an aircraft
A
- air brakes
- wheel brakes
- flight control
- thrust reversers
- extraction and retraction of landing gear
- doors
7
Q
Types of fluid-dynamic principle pumps
A
- centrifugal
- axial
- hydraulic shock pumps
- magnetofluid-dynamics pumps
8
Q
Types of volumetric pumps
A
- piston
- gear
- lobe
- membrane
- screw
9
Q
Types of hydraulic accumulators
A
- spring
- direct gas-fluid
- gas-piston
- gas diaphragm
