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M11 R > M11.13 > Flashcards

M11.13 Flashcards

1
Q

Where is the location of centre of gravity for aircraft with nose wheel steering?

A

In front of the main wheels

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2
Q

Where is the centre of gravity for aircraft that have tail wheel steering?

A

Behind the main wheels

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3
Q

Why is it better to land with nose wheel steering?

A
  • brake harder
  • lower angle of attack
  • see the runway
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4
Q

What is meant by main wheel loading?

A

When the main landing gear takes most of the weight

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5
Q

How main tyres does a bogie landing gear have?

A

More than 2

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6
Q

What is used to control aircraft steering?

A

Rudder pedals

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7
Q

What is the maximum angle for aircraft steering when using the pedals?

A

10°

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8
Q

When would you steer with the pedals?

A

When taking off or landing

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9
Q

What is the maximum angle for steering when using a tiller?

A

80°

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10
Q

What does the shock strut do?

A

It absorbs the shock on landing

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11
Q

What are the two telescopic cylinders of a main landing gear?

A

Inner and outer

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12
Q

What does the trunnions link do?

A

Transmits shock loads into the aircraft structure

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13
Q

What is the jo of the torsion link?

A

To allow for vertical movement but stop rotational moving

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14
Q

What is the drag strut used for?

A

To stabilise the shock strut

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15
Q

How is the side strut locked in position?

A

By being over centred and using the down lock mechanism (spring and actuator)

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16
Q

What is the job of the fluid metering device?

A

To control the speed of the actuators

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17
Q

What is the job of the downlock sensor?

A

To show when the landing gear is down and locked

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18
Q

What are the three different flow control devices?

A

Laminar, tapered, rebound

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19
Q

What are the two types of shock strut bearings?

A

Upper and lower

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20
Q

What does the upper bearing do?

A

Keep the inner cylinder aligned to the outer cylinder

21
Q

What is the job of the lower bearing?

A

It keeps the inner cylinder aligned inside the outer cylinder

22
Q

Where are the main landing gear spare seals kept?

A

In the spare seal cavities

23
Q

What happens if there is too much oil in the shock strut?

A

It becomes very hard on landing

24
Q

What happens if there is too much gas in the shock strut?

A

It becomes too soft on landing

25
Q

What direction does the body gear turn?

A

Opposite to the nose gear

26
Q

Why are body landing gear used?

A

To improve the turning radius and prevent scrubbing

27
Q

Why are centre landing gear used?

A

To increase the aircrafts foot print

28
Q

Why is a shortening mechanism used on landing gear?

A

To reduce the length of the landing gear to get it in the bay

29
Q

What direction does the nose landing gear retract?

A

Forward

30
Q

What is used to lock the nose landing gear down?

A

The drag strut

31
Q

What is in place to stop the gear folding in if the lock stay fails?

A

Two large springs

32
Q

What are the two centring cams used for in the nose landing gear?

A

To make sure the nose gear is straight and forward during retraction

33
Q

Why are towing lugs designed to shear at certain loads?

A

To prevent damage to the leg

34
Q

On average how many flights can a tire be used for?

A

150

35
Q

How much weight can one wheel normally take?

A

25,000kg

36
Q

What is a wheel normally made from?

A

Aluminium alloy

37
Q

Why drives the brake discs?

A

Steel drive keys

38
Q

What is the job of the fusible plug?

A

To deflate the tyre when it reaches a overheat

39
Q

How are tyres classified?

A

By speed rating

40
Q

What is meant by speed rating?

A

The maximum speed of a tyre

41
Q

How are tyres measured?

A

Section width, rim diameter, outside diameter

42
Q

How many times can a tyre be retreaded before being screapped?

A

About ten times

43
Q

What does a red dot on a tyre indicate?

A

It’s the lightest part of the tyre

44
Q

What colour are vent holes on tyres?

A

Green or yellow

45
Q

What is hydroplaning?

A

When the runway is wet causing the tyre to lift off the surface

46
Q

If a tyre is over inflated what will wear away first?

A

The centre

47
Q

If a tyre is under inflated what will wear away first?

A

The edges

48
Q

How are tyre bulges caused?

A

Overheating in the thread area

49
Q

Why are carbon breaks used over steel?

A

Lighter, less wear rate, higher temperatures

M11 R (21 decks)

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