amt 125 Flashcards
(41 cards)
purpose of hydraulic systems
To activate and move these heavy components using hydraulic force.
This removes unnecessary manual workload during flight and
reduces the possibility of the pilot becoming tired.
To activate and move these heavy components using hydraulic force.
This removes unnecessary manual workload during flight and reduces the possibility of the pilot becoming tired.
Purpose of hydraulic system
hydraulic force formula
F= P x A (force = pressure x area)
Force is measured in units called ——
Newtons
Pressure formula
P = Force/Area or PSI
Amount of force that acts on a unit of area and is calculated by dividing force by the area it is acting upon.
Pressure
It is possible to transmit force using either gas or fluids.
When a force is applied to the piston on gas container, there is much movement of piston.
WHat is this
Hydraulic Fluids
two types of hydraulic pressure
Hydrostatic Pressure
Hydrodynamic Pressure
Notice that to create the same pressure;
Piston has not moved very much, because fluid?????
Is not easily compressed
Pressure produced by static or nearly static fluids.
Type of pressure used in an aircraft hydraulic system
Hydrostatic Pressure
Color violer and can be mixed together but not the natural one
Synthetic oil
Pressure produced by moving liquids ideally with no internal friction.
Hydrodynamic Pressure
Two types of hydraulic fluid are available;
Mineral oil
Synthetic oil
What type of oil is color red and that can be mixed together
Mineral Oil
When a force is applied to the piston on the gas container, there is much movement of the piston.
Because?
Gas is easily compressed
Fluid in comparison to gas Fluids —— and transmit force more ——
Pressurize quickly and transmit force more efficiently
Which is of course man made
Synthetic OIl
Made from natural substance
Mineral Oil
Performance requirement is dependent on the following oil characteristics;
Low flammability
Good lubricating quality
Resistance to freezing
non evaporating
non foaming
chemical stability
Hydroscopic
What type of oil does airbus use
NSA
What type of oil does boeing use
BMS
Typical names for synthetic oil
Skydrol Hyjet
By using a packing such as ——
Leakage problems are solved.
O ring
is used to make a seal between environment and fluid pressure inside it.
Prevent leaks from the component housings and provide a seal between 2 different fluid pressures within a component.
Packing
