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Willys Flashing > 11.2 Instructor Q > Flashcards

11.2 Instructor Q Flashcards

1
Q

What are the principle structural elements of the aircraft?

A

The take on aerodynamic forces and stresses of flight, ground and pressurisation loads

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2
Q

What is the relationship between ultimate load limit, limit load and factor of safety?

A

Limit load X factor of safety = ultimate limit load

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3
Q

When beam like spars or other components subjected to bending moments what forces occur?

A

Tension on the outside of the bend and compression on the inside of the bend

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4
Q

What is safe life design?

A

A set time where a component should not fail

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5
Q

What is fail safe design?

A

Every component has a duplicate so if one fails it does not cause catastrophic failure

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6
Q

What is the problem of fail safe design?

A

It increases weight

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7
Q

What is damage tolerance?

A

Through multiple part design an allowable amount of damage can occur

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8
Q

What is primary structure and examples of primary structure?

A

Critical load bearing structures
-wing spars
-fuselage
-frames
-floors

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9
Q

What is secondary structure and examples of secondary structural parts?

A

All non primary structures which posses intrinsic structural significance
-wings
-ribs
-fuselage
-stringers

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10
Q

What is tertiary structure and examples of tertiary structural parts?

A

Lightly stressed structures

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11
Q

What stresses are applied to aircraft fuselage when it is pressurised?

A

Hoop stress to the skin and axial force on bulkheads

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12
Q

What are the numbers associated with the following major zones?
-upper half of the fuselage
-power plants and the struts
-right wing
-landing gear and the landing gear doors

A

-200
-400
-600
-700

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13
Q

How are access panels in a particular zone identified?

A

Two suffix letters
-sequence
-location

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14
Q

What is a body station?

A

The body station or fuselage station is a vertical plane at a right angle to the body centreline

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15
Q

How is the body station line measured?

A

From the nose or a point in front of the nose

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16
Q

What are buttock lines?

A

The body buttock line or butt lines are vertical planes parallel to the body (fuselage) centreline plane.

17
Q

What is a waterline?

A

The body waterlines are horizontal planes at a right angle to the body stations and the body buttock lines.

18
Q

How are wing stations defined?

A

The wing reference plane or wing stations extend left and right and are measured in either inches or millimetres from either a butt line reference point or from wing rib 1. The horizontal and vertical stabiliser coordinates are equal to the wing coordinates.

19
Q

What prevents fluid build up in the lower fuselage?

A

Bilge like valves

20
Q

Which areas aircraft are most likely to be hit by lightning?

A

-engine nacelle
-horizontal stabiliser
-radome
-Trailing edge discharge wicks

21
Q

What does bonding in the aircraft system provide?

A

Maintain the same potential difference across the airframe

22
Q

What provides surface protection for aluminium alloys?

A

Pre treatment and paint

23
Q

What are the functions of fuselage frames and stringers?

A

To give shape and structure and attachment points for structures

24
Q

What are the structural components for a wing?

A

Spars, skin, ribs and stringers

25
Q

what are the main structural units of an aircraft?

A

Fuselage, wings, landing gear and flight control surfaces

26
Q

What is the purpose of floor beams in an aircraft structure?

A

To take the loads of the fuselage

27
Q

What is the usual construction method of a truss type fuselage?

A

All members take all loads typically with welded steel tubing structure

28
Q

What carries the primary stresses in a monocoque construction?

A

The skin

29
Q

What is the skin reinforced by in semi monocoque construction?

A

Longitudinal members stringers and framework

30
Q

What are floorboards constructed of?

A

Honeycomb

31
Q

What structural element are the wings attached too?

A

The wing box

32
Q

What is the vertical stabiliser attached too?

A

Primary framework on the fuselage

33
Q

What is the most common method of fastening the aircraft structure together?

A

Rivets

34
Q

In which areas of aircraft are bolts used?

A

Places where high strength is needed

35
Q

Typically in which areas of aircraft is adhesive bonding used in construction?

A

Stringers to metallic aircraft structure or honeycomb

36
Q

What are the two parts of paint coatings?

A

Primer and top coat

37
Q

What are the two types of special coatings?

A

Water repellant or heavy duty corrosion inhibitor

38
Q

What are the tools and equipment required for carrying out following alignment checks?
-checking dihedral
-symmetry check
-checking incidence

A

-inclonometer or dihedral boards
-plumb bob
-incidence boards

Willys Flashing (24 decks)

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