snubber holds the hook down and prevents it from
bouncing when it strikes the carrier deck.
catapulting off the aircraft carrier. Older aircraft had
hooks on the airframe that attached to the cable bridle.
The bridle hooks the aircraft to the ship's catapult.
Newer aircraft have a launch bar built into the nose
landing gear assembly. See figure 4-16. The holdback
assembly allows the aircraft to be secured to the carrier
deck for full-power turnup of the engine prior to
takeoff. For nose gear equipment, a track attaches to the
deck to guide the nosewheel into position. The track has
provisions for attaching the nose gear to the catapult
shuttle and for holdback.
NOTE: The holdback tension bar separates when
the catapult is fired, allowing the aircraft to be launched
with the engine at full power.
In fuselage construction, what are the three
classes of monocoque design?
Points on the fuselage are located by what
In an aircraft, what are the main structural
members of the wing?
What does the term wet wing mean?
The stabilizing surfaces of an aircraft consist
of what two airfoils?
What are the three groups of flight control
What is the purpose of speed brakes on an
Most present-day Navy aircraft are equipped
with what type of landing gear?
Within the past 20 years, helicopters have become a
reality, and are found throughout the world. They
A helicopter has one or more power-driven
horizontal airscrews (rotors) to develop lift and
propulsion. If a single main rotor is used, it is necessary
to employ a means to counteract torque. If more than
one main rotor (or tandem) is used, torque is eliminated
by turning each main rotor in opposite directions.
The fundamental advantage the helicopter has over
fixed-wing aircraft is that lift and control are
independent of forward speed. A helicopter can fly
forward, backward, or sideways, or it can remain in
stationary flight (hover) above the ground. No runway
is required for a helicopter to take off or land. For
example, the roof of an office building is an adequate
landing area. The helicopter is considered a safe aircraft
because the takeoff and landing speed is zero, and it has
This allows a controlled
descent with rotors turning in case of engine failure in
Like the fuselage of a fixed-wing aircraft, the
helicopter fuselage may be welded truss or some form
of monocoque construction. Many Navy helicopters are
of the monocoque design.
Figure 4-15.Arresting gear installation.