Hydraulics Introduction Flashcards
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- Thrust reverse
- Landing gear
- Flight controls
- Brakes
Uses HYDRAULICS
- Light Weight
- Reliable
- High Efficiency (Low Friction)
- low maintenance
Advantages of hydraulics
Any substance that flows or conforms to the outline of a container
Fluid (Mechanics)
______ expand when heatedand contract when cooled.
Liquids
If a liquid is Heated in a confined container, pressure on the walls will ______.
Increase
If Liquid is COOLED, pressure on the walls will _______.
decrease
Energy cannot be created or destroyed, but only transformed from one form to another
The sum of kinetic, potential and thermal energy in a closed system remains the same
The Law of Conservation of Energy
Law statement that in a fluid at rest in a closed container, a pressure change in one part is transmitted without loss to every portion of the fluid and to the walls of the container.
The fluid exerts an equal and undiminished pressure at right angles to the container that encloses it
Pascal’s Law (Blaise Pascal)
In an open container, the pressure exerted by column of liquid is dependent on its height and independent of its volume
The shape and size of the container holding the liquid does not affect pressure, only the height of the liquid
Law of Static Fluid Pressure
If the total amount of energy in air/fluid remains constant, any increase in kinetic energy will result in a decrease in potential energy
Therefore, if speed increases (kinetic energy) pressure will decrease (potential energy).
Bernoulli’s Principle (Pressure vs. Velocity)
Pressure is inversely proportional to Velocity
the amount of push or pull on an object (measured in pounds)
Force
the amount of force on one unit of area (measured in pounds per square inch)
Pressure
Formulas
FAP, VAD, WFD, P=W/T
the time-rate of doing work (measured in ft-lbs/sec. or in-lbs/sec)
( also measured in horsepower)
power
Force Formula
F = A X P(PSI)
