Chapter 1

Question 1

What is the aim of flight safety?

Answer 1

To maximise operational capability and reduce the risks inherit to military aviation as low as reasonably practicable (ALARP)

Question 2

Describe Air Safety

Answer 2

A collective endeavour to operate safely in the air and on the ground

Question 3

What is the name of the body that deals with Airworthiness?

Answer 3

Capability directorate combat service support (CDCSS)

Question 4

What body deals with the development of new aircraft?

Answer 4

Air staff

Question 5

Describe airworthiness

Answer 5

The ability of an aircraft or airborne systems to operate in the air and on the ground with minimal hazard to aircrew, ground crew, passengers and third-parties

Question 6

What are the Design and Airworthiness requirements

Answer 6

A series of cases that define extreme conditions the aircraft will encounter in its service life

Testing to prove both static and fatigue strength

Guides to select protective finishes to enhance long term durability

Question 7

Operating conditions for airframes

Answer 7

DLL - Design Limit Loads

Proof load - 1.125x DDL,
Must not suffer permanent deformation and flying controls must function normally

Design ultimate load - 1.5x DLL,
Structure must withstand DUL without collapse

Question 8

What is the 6 stage aircraft procurement stages

Answer 8

I - Idea
P - Preliminary study
P - Project definition
F - Full development
A - Acceptance & Approval
P - production

Question 9

How is static strength proved?

Answer 9

Load the airframe first to proof load, then DUL.

Structural failure beyond DUL implies structural reserve factor is greater than 1.0

Question 10

What is aerolastic effects?

Answer 10

Flutter, a violent destructive vibration of serif oil surface caused by inertia loads, aerodynamic loads and structural stiffness

Question 11

Factors that effect airframes

Answer 11

Temperature
Corrosion
Natural hazards

Question 12

Name the 6 types of airframe design

Answer 12

Single main rotor
Tandem main rotor
Tilt twin main rotor
Dual main rotor
Tilting rotor
NOTAR

Question 13

Materials used in fuselage construction

Answer 13

Aluminium alloys
Steel alloys
Titanium alloys
Stainless steel
Glass reinforced plastic (fibre glass)
Carbon reinforced plastic (carbon fibre)
Aramid fibre (Kevlar)

Question 14

What are the advantages of aluminium alloys

Answer 14

High strength to weight ratios
Wide range of alloys for different uses
Low density
Available in many forms - sheet, plate, tubes

Question 15

What are the disadvantages of aluminium alloys

Answer 15

Prone to corrosion
Limited strength at high temps
Magnesium alloys have low strength but high weight to strength ratio

Question 16

What are the advantages of steel alloys

Answer 16

Cheap and readily available
Consistent strength
Some stainless steels highly resistant to corrosion
Hard surface resistant to wear

Question 17

What are the disadvantages of steel alloys

Answer 17

Poor strength to weight ratio
Dense
Very prone to corrosion