hydraulics Flashcards
(38 cards)
minimum amount of hydraulics required
2
what does check valve do
allow fluid to flow in one direction
what are hydraulics measured in
Psi
purpose of leak measurement solenoid valve in regard to hydraulic system
shuts down hydraulic fluid when leak is detected , it closes supply line
Do aircraft’s use hydrostatic or hydrodynamic
Hydrostatic
How is hydrostatic pressure developed
Static or nearly static fluids
How is hydrodynamic pressure developed
By flow in a system
How much is 1 bar in psi
14.5
How much is 1 Dan cm2 in kpa
100kpa
How much bar is 3000 psi
207 bar
Disadvantage of synthetic oil
More hydrophobic then mineral
Boeing hydraulic fluid
Bms
Airbus hydraulic fluid
Nsa
What are seals made of
Rubber
What is backup ring made of
Teflon
When is an o-ring used
When over 1500 psi
Difference between static and dynamic seal
Static uses 1 seal , whereas dynamic uses more then one
Resouvoir pressure
50psi
When is ground access panel accessed
Only on ground
In a variable displacement pump when is used to stop movement
Wobble plate or yoke
In electrical pumps how is the motor cooled
By air or hydraulic fluid
When is a demand pump used
When edps can’t maintain pressure
How does a ram air turbine work
Hydraullically retracted and deployed within 1 second
Purpose of hp filter
Protect system from debris
