Aircraft Design And Materials Flashcards
(30 cards)
What pressure is it within the cabin in psi?
8-9psi.
What is the time of conciseness at 35,000ft without oxygen?
30 seconds - 1minute.
What level of certification does a turbine powered aircraft use?
C25.
What level of certification does any aircraft other than a turbine powered aircraft use?
C23.
The principle behind certification is that the more blank the consequence of failure, the less likely it can happen.
Catastrophic.
The blank life is measured in cycles or landings.
Safe.
What happens to components in safety critical areas of the aircraft therefore allowing redundancy?
Duplication.
What is the term for when a structure can sustain defects safely until repair can be effected? Its a type of tolerance.
Damage tolerance.
Vibrations that change in frequency, in an engine, are a good example of what type of load?
Cyclic.
Forces imposed by manoeuvring are known as what type of load?
Dynamic load.
What does a yaw damper prevent?
Dutch roll.
What happens to abnormal load when asymmetric flight occurs?
It increases.
Name 5 forces an aircraft material can experience.
Tension, compression, torsion, shear, bend.
Aluminium posses both blank and blank.
Elasticity and plasticity.
When does maximum bending stress occur on the wing? In relation to fuel tanks.
When the wing fuel tanks are empty.
The amount of bending relief depends on the maximum blank blank weight.
Zero fuel.
What percentage of the limit load is the ultimate load?
150%
Fatigue needs a number of cycles before what?
Failure.
What occurs with corrosive condition and a steady tensile load?
Stress corrosion cracking.
What two reasons mean we use aluminium alloy within our aircraft?
Higher strength with reduced weight.
True or false : magnesium is more dense than aluminium alloys?
False.
What is a composite?
Two or more organic/inorganic components.
What is a disadvantage of using a composite?
Hard to inspect.
What corrosion would be seen in ferrous based materials?
Rust.
