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24 Cards in this Set
- Front
- Back
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The resistance to pulling apart or stretching
produced by two forces pulling in opposite directions along the same straight lines is defined by what term? |
Tension.
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The resistance to crushing produced by two
forces pushing toward each other in the same straight line is defined by what term? |
Compression.
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Define the term shear as it relates to an
aircraft structure. |
Shear is a stress exerted when two pieces of fastened material tend to separate.
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Define the term bending.
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Bending is a combination of tension and compression.
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Define the term torsion.
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Torsion is the result of a twisting force.
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Materials currently used in aircraft construction
are classified as what type of materials? |
Metallic or nonmetallic materials.
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What are the most common metallic materials
used in aircraft construction? |
Aluminum, magnesium, titanium, steel, and their alloys.
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What are the nonmetallic materials used in
aircraft construction? |
Transparent plastics, reinforced plastics, and composite materials.
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In fuselage construction, what are the three
classes of monocoque design? |
Monocoque, semimonocoque, and reinforced shell.
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Points on the fuselage are located by what
method? |
Points on the fuselage are located by station numbers, at measured distances.
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In an aircraft, what are the main structural
members of the wing? |
The spars are the main structural members of the wing.
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What does the term “wet wing” mean?
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Wet wing" describes the wing that is constructed so it can be used as a fuel cell.
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The stabilizing surfaces of an aircraft consist
of what two airfoils? |
Vertical stabilizer and horizontal stabilizer.
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What are the three groups of flight control
surfaces? |
Primary, secondary, and auxiliary.
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What is the purpose of speed brakes on an
aircraft? |
The purpose of speed brakes is to keep the airspeed from building too high when the
aircraft dives and to slow the aircraft's speed before it lands. |
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Most present-day Navy aircraft are equipped
with what type of landing gear? |
The tricycle type of landing gear.
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What is the main advantage of rotary-wing
aircraft over fixed-wing aircraft |
The main advantage of rotary-wing aircraft is that lift and control are independent
of forward speed; rotary-wing aircraft can fly forward, backward, sideways, or hover above the ground |
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What are the three types of landing gear used
on helicopters? |
Conventional fixed (skid type), retractable, and nonretractable
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The directional control and antitorque action
of the helicopter is provided by what group? |
The tail rotor group
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What are two disadvantages of a hydraulic
system? |
The possibility of leakage and contamination by foreign matter
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On a basic hydraulic system, what is the
purpose of the selector valve? |
The selector valve directs the flow of fluid
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On a basic hydraulic system, what is the
purpose of the actuating unit? |
The actuating unit converts the fluid pressure into useful work.
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Define hydraulic contamination
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Hydraulic contamination is defined as foreign material in the hydraulic system of
an aircraft. |
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What are the two types of pneumatic systems
currently used in naval aircraft? |
The two types of pneumatic systems are the storage bottle type and the type that has
its own air compressor. |
