AIRFRAME STRUCTURES Flashcards
Which part(s) of a semi monocoque fuselage prevent(s) tension and compression from bending the fuselage?
Longerons and Stringers
Longitudinal (fore and aft) structural members of a semi monocoque fuselage are called?
Longerons and stringers
The general rule for finding the proper rivet diameter is:
Three times the thickness of the thickest sheet
The shop head of a rivet should be:
One and one-half times the diameter of the rivet shank
What is the minimum edge distance for aircraft rivets?
Two times the diameter of the rivet shank
The aluminum code number 1100 identifies what type of aluminum?
99 percent commercially pure aluminum
Most rivets used in aircraft construction have
Dimples
Ms20425Ad-6-5 indicates a countersunk rivet which has
An overall length of 5/16 inch
Which rivet is used for riveting magnesium alloy structures?
5056
Which rivet is used for riveting nickel steel alloys?
Monel
The I-beam wooden spar is routed to
Reduced Weight
The strength of a well-designed and properly prepared wood splice joint is provided by the
Glue
Laminated wood spars may be substituted for solid rectangular wood spars
If the same quality wood is used in both
Laminated wood is sometimes used in the construction of highly stressed aircraft components. This wood can be identified by its
parallel grain construction
The strength classification of fabrics used in aircraft concerning is based on
Tensile Strength
(1) Machine-sewn seam in aircraft covering fabrics
(2) a plain lapped seam is cover permissible
only no.1 is true
How many fabric thickness will be found in French-felt seam?
Four
Which property applied finish top coat is the most durable and chemical resistant?
polyurethane
A correct way of using acetone is
Remove grease from fabric
What is the minimum edge distance for aircraft rivets?
Two times the diameter of the rivet shank
When drilling stainless steel the drill used should have an included angle of
140 degree and turn at a low speed
Clod aluminum alloys are used in aircraft because they
are less subject to corrosion than uncoated aluminum
The monocoque fuselage relies largely on the strength at
skin or covering
Which part(s) of a semi-monocoque fuselage prevent tension and compression from bending the fuselage?
longerons and stringers
What is the purpose of refrigerating 2017 and 2024 aluminum alloy rivets after heat treatment?
to retard age hardening
Most rivets used in aircraft construction have
Dimples
Which rivet may be used as received without further treatments?
2117- 13
Mild steel rivets are used for riveting
steel parts
A piece of sheet metals is bent to a certain radius. The curvature of the bend is referred to as the
bend radius
The aluminum alloys used in aircraft construction are usually hardened by which method?
heat treatment
