Fatigue and Stress | The Fuselage Flashcards Preview

Aircraft General Knowledge > Fatigue and Stress | The Fuselage > Flashcards

Flashcards in Fatigue and Stress | The Fuselage Deck (27)
Loading flashcards...
1
Q

Older aircraft may be made of ____

A
  • Truss
    or
  • Frame and skin
2
Q

Trusses consist of ___

A
  • Longerons
  • Diagonal braces
  • Vertical braces
3
Q

Truss constructions are ___ and take up ___ space

A

heavy much

4
Q

Monocoque means ___

A

single shell

5
Q

Monocoque is ___ and means ___ space

A

light more

6
Q

Monocoque construction is best for ___, __ fuselages

A

Long narrow

7
Q

Semi-monocoque uses ___ and ___ to keep a light framework of vertical formers and bulkheads apart.

A

longerons stringers

8
Q

Bulkheads absorb the ___ and ___ stresses, whilst the skin absorbs ___ stresses

A

tensile compression torsional

9
Q

Most of the applied stresses are dissipated by the ___ components; a small percentage is absorbed by the ___

A

internal skin

10
Q

The ___ maintain the shape of the fuselage, and ___ stiffen the metal to prevent it buckling

A

formers stringers

11
Q

____ take the main stresses

A

Longerons

12
Q

Bulkheads are similar to formers, but placed ___

A

either end of the fuselage or compartment

13
Q

Bulkheads are designed to transmit ___ ___

A

concentrated loads

14
Q

Frames are designed to maintain ____

A

rigidity

15
Q

A firewall can be a ___, or a fireproof partition separation an engine compartment from the cabin.

A

bulkhead

16
Q

Engine compartment decking and firewalls are typically made of ___ ___ or ____

A

stainless steel or titanium

17
Q

Stressed skin uses high strength ___ or ___ ___ to cope with normal bending and tangent stresses, and torsional moments.

A

magnesium aluminium alloys

18
Q

Methods of attachment include:

A
  • Riveting
  • Welding
  • Bolting
  • Pinning
  • Adhesives
19
Q

___ ___ rivets are light, small, and strong in shear.

A

Aluminimum alloy

20
Q

Black stuff from rivets is power from ___ against the aircraft skin

A

fretting

21
Q

Loose rivets can indicate ____ ____

A

excessive vibration

22
Q

Pressurisation creates ___/____ stresses

A

hoop circumferential

23
Q

The fuselage of large aircraft are usually ____ construction

A

semi-monocoque

24
Q

Longitudinal strength and rigidity may be supplemented by a ___ ___ which runs along the fuselage centreline through the wing centre section

A

kneel beam

25
Q

The area rule states that the cross section should increase and decrease ___ either side of the maximum point

A

gradually

26
Q

Adding wings to a fuselage increases the cross sectional area very ___

A

suddenly

27
Q

The sudden increase in cross-sectional area caused by the wings can be countered by ___ the fuselage at the same time, this ___ wave drag

A

narrowing reduces