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CAA Module 11 > Module 11.2b Airframe structures > Flashcards

Module 11.2b Airframe structures Flashcards

1
Q

What are longerons?

A

Main longitudinal member that carry bending loads

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2
Q

What are stringers?

A

Smaller and lighter than a longeron. They act as stiffeners and assist sheet to carry the loads

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3
Q

What are frames?

A

Vertical circular members

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4
Q

How is the frame and stringer attached together?

A

Clips/ cleats

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5
Q

What is a doubler?

A

A metal piece attach to the inner side of the skin to add extra strength

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6
Q

Where may doublers be found?

A

Cargo and passenger doors

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7
Q

What can doublers also be used for?

A

Crack stoppers placed 90 degrees to predicted path of crack propagation

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8
Q

What is a strut?

A

A member that can withstand compressive forces

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9
Q

What structural components are designed to carry tension forces?

A

Ties

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10
Q

Floor structures are attached to what?

A

Floor beams

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11
Q

The floor beams also carry what?

A

Tension forces of pressurisation and are considered part of the primary structure

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12
Q

What is done to floor beams in lav/ galley areas?

A

Sealed to stop corrsion

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13
Q

What are the span wise members of a wing?

A

Spars

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14
Q

What are the chord wise members of a wing?

A

Ribs

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15
Q

What direction do stringers run in the wing?

A

Spanwise

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16
Q

The box section allows the wing to have what?

A

Fuel tanks

17
Q

What are the tree types of fuselage construction?

A
  • Truss-type
  • Monocoque
  • Semi-monocoque
18
Q

What is a truss type?

A

Frame work takes load

19
Q

What takes the load on a monocoque fuselage?

A

The aircraft skin as it is thicker

20
Q

What takes the load on a semi-monocoque structure?

A

Skin and supporting members

21
Q

What is the advantage to a semi-monocoque structure?

A

Can withstand high damage without failure

22
Q

How can the skin of the aircraft be attached?

A

Riveting or bonding

23
Q

What should the skin be treated with to stop premature failure?

A

Anti-corrosion protection

24
Q

How are wings fitted to the aircraft?

A

Connected to a centre wing box which is an integrated part of aircraft fuselage/ structure

25
Q

How is the wing box supported?

A

Heavy frames and keel beams

26
Q

What is the method of skin protection?

A
  • Pre treat
  • Primer
  • Top coat
27
Q

What direction do keel beams run?

A

Longitudinal

28
Q

What areas don’t have paint protection?

A
  • Leading edge wings and engine
  • Pylon
  • Scuff plates
  • Equipment

CAA Module 11 (22 decks)

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