Grade 9 Task
Grade 9 Task
Term 3
Hydraulics and Pneumatics
Section: A
1. a) Good examples of hydraulic systems include automotive brakes, and the control systems of large aircraft.
Hydraulic systems supply forces somewhere remote from where it is practical to locate large machinery.
Hydraulics gives high forces with low losses, thanks to the virtual incompressibility of hydraulic fluids. Pneumatics is usually less efficient, though simpler since the "reservoir" in the circuit is the atmosphere. That eliminates return piping and leakage problems.
b) Advantages:
It uses 'incompressible' fluid which results in a greater, more efficient & consistent work or power output. This is due to the fact that hydraulic fluid molecules are able to resist compression under heavy load hence minimal energy loss is experienced and work applied is directly transferred to the actuating surfaces.
As opposed to pneumatic system which uses air, a leakage in a hydraulic system is easier to spot during ground maintenance operations.
Hydraulic fluid operates very well in a very hot working environment, it is able to sustain its airworthiness viscosity, density & fluid temperature even if it subjected under extreme heat. This is especially important on aircraft structures that are abundant of hot working conditions during flight operations. Disadvantages:
Hydraulic fluid is highly corrosive to most of the aircraft materials.
Due to the heavy loads experienced in a typical hydraulic system, structural integrity is a must which also means higher structural weight for the aircraft in addition to the weight of its hydraulic lines, pumps, reservoirs, filters, & etc.
Hydraulic system is susceptible to contaminations & foreign object damage (FOD).
Mishandling and constant exposure to hydraulic fluid and its gas fumes without proper equipment and precautions is a health risk.
If disposed improperly, a hydraulic fluid is an environmental risk.
2.
Section: B
1. Hydraulic
Term 3
Hydraulics and Pneumatics
Section: A
1. a) Good examples of hydraulic systems include automotive brakes, and the control systems of large aircraft.
Hydraulic systems supply forces somewhere remote from where it is practical to locate large machinery.
Hydraulics gives high forces with low losses, thanks to the virtual incompressibility of hydraulic fluids. Pneumatics is usually less efficient, though simpler since the "reservoir" in the circuit is the atmosphere. That eliminates return piping and leakage problems.
b) Advantages:
It uses 'incompressible' fluid which results in a greater, more efficient & consistent work or power output. This is due to the fact that hydraulic fluid molecules are able to resist compression under heavy load hence minimal energy loss is experienced and work applied is directly transferred to the actuating surfaces.
As opposed to pneumatic system which uses air, a leakage in a hydraulic system is easier to spot during ground maintenance operations.
Hydraulic fluid operates very well in a very hot working environment, it is able to sustain its airworthiness viscosity, density & fluid temperature even if it subjected under extreme heat. This is especially important on aircraft structures that are abundant of hot working conditions during flight operations. Disadvantages:
Hydraulic fluid is highly corrosive to most of the aircraft materials.
Due to the heavy loads experienced in a typical hydraulic system, structural integrity is a must which also means higher structural weight for the aircraft in addition to the weight of its hydraulic lines, pumps, reservoirs, filters, & etc.
Hydraulic system is susceptible to contaminations & foreign object damage (FOD).
Mishandling and constant exposure to hydraulic fluid and its gas fumes without proper equipment and precautions is a health risk.
If disposed improperly, a hydraulic fluid is an environmental risk.
2.
Section: B
1. Hydraulic