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MyAGK > S Landing Gear > Flashcards

S Landing Gear Flashcards

1
Q

What is a bogey truck?

A

Allows the fitment of more wheels

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2
Q

Which landing gear should touch down first?

A

Main wheels, touching down on the nose could cause collapse

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3
Q

What is the oleo strut?

A

Landing gear leg - Hydro-pneumatic shock absorber

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4
Q

What is the state of the oleo strut when the aircraft is stationary?

A

Gas pressure = weight force of the aircraft

Additional load causes oleo to compress

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5
Q

What can cause low ride height/oleo compression?

A

Low gas pressure or fluid leak

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6
Q

What hydraulic fluid does the oleo usually have?

A

Mineral hydraulic oil - DTD585, red in colour

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7
Q

What is the oleo leg?

A

Absorbs loads and dampens rebound

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8
Q

What is the purpose of wheel axles?

A

Allow wheels to rotate freely

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9
Q

What is a drag a strut?

A

Brace the assembly against shock loads

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10
Q

What is a side stray ?

A

Braces assembly against side loads during taxiing and landing

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11
Q

What are torque/scissor links?

A

Prevent rotation of the inner oleo cylinder, allows the to be telescopic whist preventing the 2 sections rotating independently

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12
Q

What is a down lock?

A

Over centre lock ensuring the gear cannot be accidentally retracted

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13
Q

What is released in an emergency to drop the gear?

A

The up lock

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14
Q

What is a ground lock?

A

Mechanical device which physically prevents the gear from retracting - fitted with remove before flight flag

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15
Q

What is Vlo?

A

Velocity landing gear operation

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16
Q

What is Vle?

A

Velocity landing gear extended

17
Q

What are emergency methods to release gear?

A
  • Manual hand crank
  • Compressed nitrogen to blow the gear down
  • Gravity free fall system
  • Manual handle
18
Q

How does the manual handle work?

A
  • Release up locks
  • Opens safety valve
  • Gear descends under gravity
  • Over centre locks ensure the gear is down and locked
19
Q

What are 3 ways nose whee steering can be achieved?

A
  • Differential breaking
  • Rudder pedal steering
  • Tiller operation
20
Q

What is the maximum steering direction that nose wheel steering can achieve?

A

75 degrees in either direction

21
Q

What is nose wheel shimmy?

A

Lateral oscillation along the longitudinal axis

22
Q

What are 3 ways to stop nose wheel shimmy?

A
  • Shimmy damper - Hydraulic cylinder acts as damper
  • Dual nose wheel - 2 points of contact
  • Maarstrand tyre - Special tyre that has 2 points of contact
23
Q

What faults can nose wheel shimmy indicate?

A
  • Worn or broken torque links
  • Wear in the wheel bearings
  • Low or uneven tyre pressures

MyAGK (37 decks)

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