Fast Jets Flashcards
3 types of caution
warning, caution , advisory
what do hydraulics do
force multiplication
what direction does force go in hydraulic column
every direction evenly
what does resevoir do hydraulics
cools and de-aerates
2 types of actuators
single acting eg. uplock, double acting eg. flaps
5 positives of hydraulics
simple, reliable, resist EM, good power to weight, rapid and precise response.
most common hydraulic system
undercarriage
how long does backup system lsat
indefinitely
PFCU
powered flying ocntrol unit- controlled movement of larger control surfaces to counter aerodynamic forces at higher speeds
2 warnings from hydraulics
high temp low pressure
what ensures under carriage operates in cirrect order
sequencing valve
what uses incompressability of oil
actuators, brake calipers, shock absorbers
fuseable plug
fis in wheel, melts at set temp and lets wheel deflate rather than explode
3 green lights
undercarriage down and locked
uplock
disengages under carriage prior to extending
what gas in blow down system
nitrogen
WoW?
weight on wheels. enables components to use on ground eg brakes, disables components for air eg weapons
split rim?
2 halves of wheel bolted together, allows tyres to be fitted without straetching over frames
re tread
replace rubber over carcass once max tread wear
what cant do to undercarriage once lowered in emergency
take back up
ABS varies?
frequency and pressure of brakes
Brakes material and make up
carbon composite discs
micro switches
control red/green attention lights
differential braking
use brakes independantly to decrease turn circle
creep marks
marks on tubed tyres and wheel to see if tyre moved relative to wheel so inner tube pump valve dont fuck up
2x landing gear down lock
external over centre geometric, integral with actuator
advantages of liquidO2
less bulk and weight
why need to fly high?
get over high terrain, get over weather, increased turbo fan efficiency, increase cruise speed
symptoms of hypoxia at 15-20k ft
euphoria or violent tendencies
carbon monoxide poisoning fills what
your butthole. haemoglobin seats
how long emergency O2 systems last
10min
CAU
cold air unit
symptoms of decompression sickness
bends, itchy skin, chokes, collapse
PSID
pounds per square inch differential
molecular seive
takes nitrogen out of air, cant cope with rapid decompression
bottled O2 benfits
simple, use immediately
cabin pressurization level
6-8k ft
barotrauma
imbalance of pressure in middle ear
what can GPU provide
28V or 200V
CSDU
Constant Speed Drive Unit - msintains constant generator RPM/voltage output
AC systems voltage
200v 3 phase 400 hz
invertor
DC to AC
converter
changes AC frequency
TRU
transformer rectifier unit changes AC of one voltage to DC of another
difference between normal and emergency contactor relay
emergency forces contactor open when on so if no power and goes off then contactor completes circuit
3 main busbar categories
essential, non essential, vital
component that links busbars
bus tie relay/contactor
aircraft electrical systems must be maintained within…
set tolerence of engine speeds and electrical loads
2 generators running in parallell must sense…
volt, phase, frequency
load sharing control unit
ensures equal output from each generator
system protection
fuse (too much voltage) circuit breaker (current) Reverse current cut out
what disconnects battery in crash
crash switch
