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49 Cards in this Set
- Front
- Back
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…. …. system is simple
allowing one component operation at a time |
open circuit
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In Closed Circuit systems
operation pressure is …. |
maintained @ all time
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Closed Circuit systems
use …. circuit for ... |
idling
fluid back |
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Closed Circuit systems
operating Px is … to .. normally ... |
1000 to 4000
3000 PSI |
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System powered by hydraulics
(5) |
FC's
Landing gears steering brakes satires and doors |
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hydraulic advantage over pnum.
….. so it gives …. easy to ... |
incompressible / instant resp.
detect leaks visually |
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hydraulic fluids (3)
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miniral
synthetic vegetable based |
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synthetic hydraulic fluid is … based
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phosphate ester
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Skydrol
is … based color …. |
synthetic
lite purple |
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H5606 hydraulic fluid
is …. based color ... |
miniral
red |
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DTD 585
is … based color …. |
miniral
red |
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hydraulic fluid fire resistance :
H5606 : … skydrol : … DTD 585 : ... |
fire resistant
fire resistant burns easily |
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mostly used hydraulic fluid by large aircraft
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skydrol
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Lockheed 22 hydraulic fluid
is … based color ... |
vegetable
amber |
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Bootstrapping
is … Pressurization using …. to prevent ... |
reservoir
hydraulic pump system pressure cavitation |
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oil filters are fitted ….
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Up and Dn stream of reservoir
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Constant delivery (volume) pump:
operate …. pumps … quantity delivering …. |
continuously
constant flow rate |
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Constant delivery (volume) pump:
requires … and ... |
accumulator
Px regulator / relief feature |
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Constant Pressure pump
output ……….. is …. for …. requirements |
varies with demand
piston type pump / Hi Px |
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A shuttle valve
has …. can ….. allow …. to ... |
2 source (hd/pnum)
isolate normal sypply alternate / take over |
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hydraulic component
allows flow in one direction only |
check valve
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Priority valve job?
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maintains Px to
essential system @ low Px conditions |
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Accumulator
protection against …. a means of ….. |
Px surges
storing hydraulic Px |
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Accumulator gage indication
When depleted : … when at operation : ... |
Pre charge nitrogen Px
System working Px |
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Accumulator gas charge
should be grater than ... |
Px required to operate
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Hydraulic fuse
Protects ……… Works on … / … principle |
leaks downstream of fuse
Px differential / flow quantity |
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hydraulic component
reduces Px for some equipment like Brakes |
Deboost valve
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ATM stands for ….
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Air Turbine Motor
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RAT provides ….
ATM provides ... |
electrical power
Emergency supply of hydraulic |
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Bleed air can be used for hydraulic …. pressurization .
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reservoir
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Cabin Pressurization is
by ……. for ... |
conditioned air
compressor |
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Cabin Pressurization is
regulator by ….. which is …. @ ground |
outflow valve
open |
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Cabin Pressurization
system components (3) |
outflow valve
safety valve inward relief valve |
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max cabin altitude ?
typically ? |
8000 ft
6000 - 7000 |
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Differential Px is normally ….
depending on ... |
6 - 9 PSI
airframe construction |
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Pre T.O. Pressurization
helps … reduces ... |
structural rigidity
cabin bumps |
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Air Conditioning has … or ...
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packs
ECU (Environnemental Control Unit) |
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ACM stands for ...
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Air Cycle Machine
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VCM stads for ...
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Vapor Cycle Machine
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In ACM:
… drives a …. so …&… rise. …. removes heat cool Hi Px air goes through … so it ….. and cools further. |
bleed air / compressor / Px T
heat exchanger ejector expands |
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Bootstrap system
a ….. cools using …. a …. increases ….&…. a ….. cools again (to be cont.) |
Primary heat exchg/ outside air
compressor / Px T Secondary heat exchg |
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Bootstrap system
max temp drop @ … by …. the cooled air converting …. into ... |
turbine
expanding heat / work |
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VCM principle ?
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refrigerant ability to absorb heat
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VCM is a … system of
….. & …. of freon . |
closed
evaporation condensation |
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VCM is a bette cooling system in which no …. is required .
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bleed air
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VCM 4 component
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compressor
condensor expansion valve evaporator |
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VCM sequence
@compressor : freon is a … & … gas @condesing coil : excess heat is removed & freon → … … @expanstion valve ….. @evaporator : freon → … and …. is transferred |
Hi Px low Temp
Hi Px low Temp liquid Px is relived gas again heat |
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In VCM
cabin air passes over ... |
the evaporator
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a Water extractor is …. of ….(loc)
prevents … and ... |
downstream / turbine
precipitation / icing |
