Aircraft Design And Materials Flashcards

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1
Q

What pressure is it within the cabin in psi?

A

8-9psi.

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2
Q

What is the time of conciseness at 35,000ft without oxygen?

A

30 seconds - 1minute.

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3
Q

What level of certification does a turbine powered aircraft use?

A

C25.

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4
Q

What level of certification does any aircraft other than a turbine powered aircraft use?

A

C23.

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5
Q

The principle behind certification is that the more blank the consequence of failure, the less likely it can happen.

A

Catastrophic.

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6
Q

The blank life is measured in cycles or landings.

A

Safe.

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7
Q

What happens to components in safety critical areas of the aircraft therefore allowing redundancy?

A

Duplication.

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8
Q

What is the term for when a structure can sustain defects safely until repair can be effected? Its a type of tolerance.

A

Damage tolerance.

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9
Q

Vibrations that change in frequency, in an engine, are a good example of what type of load?

A

Cyclic.

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10
Q

Forces imposed by manoeuvring are known as what type of load?

A

Dynamic load.

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11
Q

What does a yaw damper prevent?

A

Dutch roll.

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12
Q

What happens to abnormal load when asymmetric flight occurs?

A

It increases.

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13
Q

Name 5 forces an aircraft material can experience.

A

Tension, compression, torsion, shear, bend.

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14
Q

Aluminium posses both blank and blank.

A

Elasticity and plasticity.

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15
Q

When does maximum bending stress occur on the wing? In relation to fuel tanks.

A

When the wing fuel tanks are empty.

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16
Q

The amount of bending relief depends on the maximum blank blank weight.

A

Zero fuel.

17
Q

What percentage of the limit load is the ultimate load?

A

150%

18
Q

Fatigue needs a number of cycles before what?

A

Failure.

19
Q

What occurs with corrosive condition and a steady tensile load?

A

Stress corrosion cracking.

20
Q

What two reasons mean we use aluminium alloy within our aircraft?

A

Higher strength with reduced weight.

21
Q

True or false : magnesium is more dense than aluminium alloys?

A

False.

22
Q

What is a composite?

A

Two or more organic/inorganic components.

23
Q

What is a disadvantage of using a composite?

A

Hard to inspect.

24
Q

What corrosion would be seen in ferrous based materials?

A

Rust.

25
Q

What corrosion would be seen with aluminium and alloys?

A

Oxidation.

26
Q

What corrosion would be seen with aluminium and alloys?

A

Oxidation.

27
Q

What type of environment is more likely to see corrosion?

A

Humid.

28
Q

Which structural element of the fuselage helps most to endure twisting and torsional loads?

A

Longerons.

29
Q

The purpose of stringers, used in fuselage construction, is to…

A

Assist the skin with loads.

30
Q

In light aircraft and helicopters, brakes are operated using a (1) _____ hydraulic system, with pressure being provided by the force from the (2) _____.

A

Passive pedals