The Airframe

Question 1

What material usually forms the skin of an aircraft?

Answer 1

Aluminium

Question 2

The fuselage is of what kind of construction?

Answer 2

Semi-monocoque

Question 3

What is a monocoque construction?

Answer 3

No internal structure
Stress carried by the skin

Question 4

What is a strut-type construction?

Answer 4

Internal framework carries all the stress

Question 5

Semi-monocoque construction is a compromise between what two types?

Answer 5

Strut-type and monocoque

Question 6

The windscreen typically consists of what material?

Answer 6

Perspex

Question 7

Properties of perspex?

Answer 7

Easily scratched

Question 8

In a wing, what attaches to the fuselage and extends to the wing tip?

Answer 8

Spar

Question 9

What carries the major loads in a wing?

Answer 9

Spars

Question 10

What wing structure provides external strength by transmitting extra loads to the fuselage?

Answer 10

Struts

Question 11

What does a strut do?

Answer 11

Transmits extra loads of the fuselage

Question 12

What structures run roughly perpendicular to the spars? in a wing

Answer 12

Ribs

Question 13

What do ribs transmit?

Answer 13

Loads between the skin and the spars

Question 14

What transmits loads between skins and spars?

Answer 14

Ribs

Question 15

What calculation identifies the physical loads that an aircraft will undergo?

Answer 15

Stress analysis

Question 16

What is stress caused by?

Answer 16

External forces acting on a material

Question 17

What is stress?

Answer 17

Internal force that opposes deformation

Question 18

What is strain?

Answer 18

The degree by which a material has been defroemd from a force or load

Question 19

How are stress and strain different?

Answer 19

Stress is resistance to deformation
Strain is the degree of deformation

Question 20

What are the 5 major stresses?

Answer 20

Compression
Tension
Shear
Torsion
Bending

Question 21

What is tension?

Answer 21

Pulling apart

Question 22

What is compression?

Answer 22

Pushing together

Question 23

What is torsion?

Answer 23

Twisting apart

Question 24

What is shear?

Answer 24

Laterally shifting layers about a point

Question 25

What occurs at the outside of a bend?

Answer 25

Tension

Question 26

What occurs at the inside of a bend?

Answer 26

Compression

Question 27

What stresses are aircraft meant to avoid?

Answer 27

Bending

Question 28

Instead of bending, what are aircraft parts meant to undergo?

Answer 28

Tension and compression

Question 29

Why is nylon better than manila rope (for tying down aircraft)?

Answer 29

It is more elastic and less likely to shrink when wet

Question 30

How does carbon monoxide affect the body?

Answer 30

Displaces oxygen from the bloodstream

Question 31

What can be fitted to the flight control system to prevent excessive movement?

Answer 31

Stops

Question 32

The flight control system on most light training aircraft are of what type?

Answer 32

Mechanical flight control system

Question 33

What is the Elastic Limit?

Answer 33

The limit of distortion at which the structure returns to its original shape and dimensions

Question 34

What is the limit of distortion at which the structure returns to its original shape and dimensions?

Answer 34

Elastic limit

Question 35

What is the Yield Point?

Answer 35

The point at which deformations become permanent

Question 36

What is the point at which deformations become permanent

Answer 36

Yield Point

Question 37

What is the Ultimate Load?

Answer 37

The load at which failure of the structure occurs

Question 38

What is the load at which failure of the structure occurs?

Answer 38

Ultimate Load

Question 39

What does Fail Safe mean?

Answer 39

If one part fails, the remaining parts in the system will continue to operate

Question 40

What does Safe Life mean?

Answer 40

A component is released with a specific 'life' of hours or cycles, until replacement

Question 41

If one part fails, the remaining parts in the system will continue to operate. This is given what term?

Answer 41

Fail Safe

Question 42

A component is released with a specific 'life' of hours or cycles, until replacement. This is given what term?

Answer 42

Safe Life

Question 43

The main weight of the aircraft is supported by what structures?

Answer 43

The main spar, connected to the undercarriage

Question 44

What are fuselage formers?

Answer 44

Components that provide only 'shape' to the fuselage