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M11 New > 11.13 > Flashcards

11.13 Flashcards

1
Q

What aircraft uses tail wheel configuration

A

Propeller and light

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2
Q

In a tail wheel configuration where is the main gear located in terms of CoG

A

Foward of the aircraft centre of gravity

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3
Q

What’s the most used landing gear arrangement and where is the Cog

A

Tricycle configuration

CoG is ahead of main wheels

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4
Q

What’s are 3 advantages of tricycle configuration

A

Ground looping prevented

Better braking

Forward vision not obstructed

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5
Q

What is thr configuration of the landing gear in tandem

A

Main and tail along longitudinal axis

Gear is fwd and aft of CoG

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6
Q

What aircatft uses fixed landing gears

A

Low speed aircraft to save weight and money

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7
Q

What’s the function of the truncation link

A

Connect top of the leg to wing structure

Leg can rotate into out and of landing gear bay

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8
Q

What are the cylinders filled with

A

Hydraulic oil and nitrogen

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9
Q

What makes sure that 2 parts of landing gear can’t fold together when the main gear is extended

A

Gear down lock mechanism

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10
Q

What does the shortening mechanism work in opposite to

A

Landing gear extension

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11
Q

Where is the nose landing gear retracted to

A

Fwd into fuselage

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12
Q

How many wheels does the nlg have and is it steerable

A

2 wheels and steerable with no brakes

(Lighter then Main Landing Gear)

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13
Q

How does the ngl extend without hydraulics

A

Weight of the gear and air stream

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14
Q

What does the axle do

A

Proved instillation of the aircraft wheels

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15
Q

What does the axle do

A

Proved instillation of the aircraft wheels

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16
Q

What does a torque link dampener do

A

Named shimmy damper

Counteracts wheel shimmy

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17
Q

What are the two types of shock absorbers

A

Solid - made of steel or rubber

Oleo pneumatic - fluid spring with gas or oil

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18
Q

What are the two parts of oleo pneumatic strut

A

One compresses oil at pressure above 700 bar

One uses oil and nitrogen

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19
Q

What are main gear shock struts serviced with

A

Nitrogen gas and specified hydraulic fluid

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20
Q

Why do we need correct sequencing with the landing gear

A

Prevents it from getting jammed

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21
Q

How is the inner cylinder in the nose shock strut during take off

A

Inner cylinder in the nose fully extendeds

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22
Q

On nose gear extension what makes sure that the jack moves under positive pressure

A

Restricted return flow

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23
Q

What emergency extension system is preferred

A

Free fall system

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24
Q

What does a green light indicate

A

Down and locked

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25
Q

What colour indicates the landing gears is unlocked or travelling

A

Red

26
Q

If no lights are showing what does that mean for the gear

A

Up and locked

27
Q

What are micro switches and used when

A

Devices that can open and close an electrical circuit at very high speed

Used when physical contact with an object is permissible

28
Q

When are proximity switches used

A

When high risk of contact corrosion can occur from dirt and moisture

29
Q

2 types of proximity switches

A

Reed and Electrical

30
Q

How does a reed switch protect against corrosion

A

Contacts are in a glass tube

31
Q

What material is a electronic proximity switch

A

Non magnetic ferrous metal to influence electrical characteristics

32
Q

How can the crew visually see if landing gear is down and locked

A

Small viewing assembles in the floor of aircraft

Correct positioning is indicated by red paint stripes and arrows aligned

33
Q

When can the auditory warning not be cancelled unless the landing gear is selected down

A

If the landing flap is selected with the gear not down

34
Q

What are aircraft wheels made of

A

Forged or cast from aluminium alloy

35
Q

How and when are wheels balanced

A

Statically and dynamically at manufacture

36
Q

How and when are wheels balanced

A

Statically and dynamically at manufacture

37
Q

Where are brakes fitted

A

Inboard half of the wheel

38
Q

What’s the job of a fusible plug

A

Release tyre pressure when the temperature of a wheel hits a certain temperature

39
Q

What aircraft use single disk brakes

A

Small aircraft

40
Q

How many brake linings in a single disk brake

A

6

41
Q

How does the caliper housing remove unwanted air

A

Bleed port

42
Q

Why would you multiple disk brakes

A

Increased friction surface to maximise braking forces and heat to disperse

43
Q

Rotor and stator material

A

Carbon fibre

40% lighter than conventional brakes

44
Q

Advantage for carbon heat packs

A

Withstand temperatures over 50% higher than steel brakes

Last 20-50% longer

45
Q

Brake piston function

A

Apply brake force relative to pressure applied to brakes

Compensate for the wear of disc brakes

Automatically adjust brake clearance

46
Q

What is piston clearance

A

Distance between piston and spring sleeve

47
Q

What shows us the wear of the heat pack

A

Wear indicator pin

48
Q

How many wear indicators attached to pressure plate

A

2

49
Q

Where is brake booster located

A

Downstream of the control valve and anti skid

50
Q

How does parking brake work

A

Shut off valve is closed in the common return line

Traps fluid in the brakes which keeps rotors stationary

51
Q

What colour are numbers 0-4

A

White

52
Q

What colour are numbers 5-9

A

Amber

53
Q

What does brake debooster do

A

Reduces the maximum hydraulic system pressure

54
Q

Type 3 tyres

A
55
Q

Type 7 tyres

A

High performance on jet aircraft

56
Q

Type 8 tyres

A

High pressure and high speed aircraft

Most advanced

57
Q

Fabric layer in tyre

A

Carcass

58
Q

Fabric is orientated to what

A

90 degrees to Plane of rotation

59
Q

What does a balance mark show

A

Light point in tyres balance

60
Q

What Touchdown protection

A

Anti skid valve opens passage between brakes and hydraulic system

Stops build up in brakes

61
Q

What are tyres inflated to for storage

A

20-30psi

M11 New (17 decks)

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