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M11 new josh > 11.13 landing gears > Flashcards

11.13 landing gears Flashcards

1
Q

what are the 3 main landing gear configurations

A

tail wheel, tricycle-type, tandem

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2
Q

where are the main landing gears usually located

A

around the centre of gravity

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3
Q

where is the tail wheel configuration mostly used

A

propeller, light aircraft

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4
Q

whats the most common landing gear configuration

A

tricycle configuration

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5
Q

whats the most uncommon landing gear configuration

A

tandem

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6
Q

where are fixed landing gears found

A

low speed, light aircrfat

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7
Q

whats the MLG

A

main landing gear

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8
Q

what does the trunnion link do on the MLG

A

connects the top of the leg to the wing structure, allows it to rotate

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9
Q

what 2 cylinders does a shock strut have

A

outer and inner

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10
Q

what do the upper and lower torsion links allow to extend

A

the strut

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11
Q

what does the side strut do

A

resist lateral or sideways movement

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12
Q

what does the gear down lock ensure

A

two parts cant fold together when extended

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13
Q

how does the down lock work

A

goes into an over centre position

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14
Q

whats the use of a shortening link

A

shortens the gear during retraction

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15
Q

whats the NLG

A

nose landing gear

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16
Q

on the NLG what does the torque link damper do

A

prevents wheel shimmy

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17
Q

what can existing shock absorbers be divided into

A

solid, oleo-pneumatic

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18
Q

what are main gear shock struts serviced wiht

A

nitrogen gas and hydraulic fluid

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19
Q

whats are the 3 positions of the LG control lever

A

up, off, down

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20
Q

when retracted what locks the gear in place

A

mechanical up-lock hook

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21
Q

in an emergency how will the landing gears be extended

A

an actuator will release the up-lock and the gears will free fall

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22
Q

what does the green indication mean in the cockpit

A

down and locked

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23
Q

what does the red indication mean in the cockpit

A

unlocked or traveling

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24
Q

what does no light indication mean in the cockpit

A

up and locked

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25
how do microswitches operate
at very high speeds when in contact with an object
26
what are proximity switches at high risk of
dirt or moisture
27
what are the 2 types of proximity switch
reed, electronic
28
how can it be checked in the landing gear that its down and locked in the event of system failure
visual glass panels
29
what prevents the heat from the breaks damaging the tyres
heat shield
30
what temperature can the breaks reach
1000 degrees celcius
31
what bearings do wheels have
32
what are the 3 common aircraft brakes
single disc, dual disc, multiple disc
33
what energy converts to what when using the brake unit
kinetic to heat energy
34
where must you approach a tyre from if the brakes overheat
from the rolling direction
35
what aircraft use single disc brakes
small, light aircraft
36
what are the rotors and stators made of in the heat pack
carbon or steel
37
modern heat and brake pack assemblies have rotors and stators made from what
carbon fibre
38
carbon brakes last how much longer than steel brakes
20-50%
39
how much lighter are carbon heat packs then steel
40%
40
what is the brake piston housing made from
forged aluminium alloy
41
how do we look at the amount of break wear
wear indicator pin
42
how do we know when the heat pack is fully worn
the indicator pin is flush
43
how does the brake control/metering valve work
reacts to force on breaks
44
whats the function of brake deboosters
apply force over different sized pistons to reduce pressure
45
whats ABS
anti-lock braking system
46
what is maximum braking efficiency
wheels are decelerating at max rate but not skidding
47
what are control unit also known as in the anti skid system
brain
48
why must brakes not be applied immediately after touchdown
could cause a tyre blowout
49
what can the auto brake system do
stop the aircraft at selected deceleration without pilot input
50
when do auto brakes deactivate
the pilot presses the pedals
51
what are the different types of tyres
type I, type III, type VII, type VIII
52
describe type I tyres
design is no longer active, used on fixed gear aircraft
53
describe type III tyres
general aviation tyres, light aircraft
54
describe type VII tyres
high performance tyres, jet aircraft
55
describe type VIII tyres
high pressure and high speed, most advanced tyres on jets today
56
what is ply rating with tyres
relative strength
57
aircraft tyres can be classified as what 2 things
tubed or tubeless
58
what does radial ply allow for the tyres
high loads with minimal deformation
59
what 4 regions can tyres be split into
bead, carcass plies, tread, sidewall
60
what are beads in tyres
steel wires embedded in the rubber
61
what issue does the tread minimise in bad weather
hydroplaning
62
what are awl marks on tyres
green/grey paint marks to show where entrapped gasses where released in manufacture
63
what tyre thread is used on the nose wheel
chine tread
64
when inspecting tyres what would make it need replacing in terms with the tread
less than 2mm deep for more than 25% of the thread
65
how many times can an aircraft wheel be re-treaded before they are scrapped
10
66
how do dry braking flats occur
tyre locks while on dry surface
67
when does a wet braking flat occur
tyre locks while on wet surface
68
when must a tyre be removed in terms with inflation
when its less than 80% of the required psi
69
when can sidewall cracking occur
tyre experiences high deflection or weathering
70
how can braking damage the tyre
because of its high heat
71
where must tyres be store
cool, dry environment out of direct sunlight
72
what is differential breaking
operating the breaks on one side of the aircraft and not the other
73
whats is NWS
nose wheel steering
74
can torque links prevent nose wheel shimmy
not effective at it
75
how can shimmy be controlled on the nose wheel
damping
76
before a nose wheel retracts, because it is movable what must it do
self centre
77
what is used to self centre the nose wheel
centering cams
78
whats the purpose of the main gear steering
reduce tyre scrub and aircrafts turn radius
79
whats the max nose gear steering angle
70 degrees
80
whats the max MLG steering angle
5-8 degrees
81
what must the nose wheel steering be while towing
isolated/locked
82
what is air/ground sensing
prevent certain things happening in the air or ground
83
what is WOW
weight on wheels
84
where are WOW sensors located
main and nose gear shock struts

M11 new josh (23 decks)

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