AC STRUCTURES AND LANDING GEARR Flashcards
It is the reference wood
used for aircraft structures because of its
uniformity, strength, and excellent shock resistance qualities.
Sitka spruce
It is constructed of
two or more layers of solid wood that are
bonded together.
Laminated wood
2 General groupings of sheet metal components:
Structural components, Non-structural
components
Structural components
Non-structural components
Those components of aircraft that
transfer the forces exerted on the aircraft
from one location to another or absorb the
forces during flight.
Structural Components
Those components of aircraft that do
not transmit or absorb the forces of flight.
Non-structural Components
It is the stress that resists a force
that tends to pull something apart. It is the
stress in a member when a force tends to
elongate or stretch it.
Tension Stress
It is the resistance to crushing
produced by two forces pushing toward
each other in the same straight line.
COMPRESSION STRESS
It is the stress an object experiences when it is twisted.
Torsion Stress
It is the stress developed when a
force tends to cause a layer of material to
slide along an adjacent layer.
Shear Stress
It is actually a
combination of compression and tension. It
is the stress that tends to crush or press
together.
Bending stress
3 Landing Gear Arrangement / Configuration
Tail Wheel (Conventional)
Tricycle-Type Landing Gear
Tandem Landing Gear
The main wheels are located
in line under the fuselage and outrigger
wheels support the wings.
Tandem Landing Gear
2 Classification of Landing Gear
Fixed Landing Gear
Retractable Landing Gear
8 Landing Gear Types
Hulls and Floats
Ski Landing Gear
Skids Landing Gear
Shock Absorbing and Non-Shock Absorbing Landing Gear
Leaf-type Spring Gear
Rigid
Bungee Cord
Airplanes from water may be
provided with a single or double float
depending upon the design and
construction.
Hulls and Floats
It is a landing gear designed
to accommodate operations on snow and
ice.
Ski landing gear
It is a tire type that the most popular
low-pressure tire found today on
piston-powered aircraft.
type III tire
They have exceptionally high load carrying ability and are available in ply ratings from 4 to 38.
Type VII extra-high pressure tires
The _____________ of a tire relates to its maximum
static load and its inflation pressure.
ply rating
Those have an inner liner that is
approximately one- tenth of an inch thick
and serves as a container for the air.
Tubeless tires
Those have no such liner, but are
somewhat smoother on the inside so the
tube will not be damaged by chafing
against the inside of the tire
Tube type tires
The most prevalent arrangement on modern aircraft is the _____________ configuration.
tricycle gear
A ________________ brake system utilizes a
forged-steel disc with a smooth ground
surface that is keyed to rotate with the
wheel.
floating-disc
A __________________ is bolted to a flange on the aircraft landing-gear strut, and lining cavities in the housing.
cast-aluminum or magnesium alloy
housing
A ______________________, holds a
machined aluminum alloy piston that is
sealed in the cavity with an O-ring packing
around its circumference
piston cavity, or cylinder
This device maintains the proper disc to friction puck spacing as the puck wear with use.
Automatic adjusters
The ________________ are keyed to a torque
tube that allows them to move laterally,
while not allowing them to rotate with the
wheel and rotating disc assembly
stationary discs
A __________________ is placed between
each of the stationary discs.
rotating disc
The ______________________ are keyed into the wheel by disc-drive tangs.
rotating discs
These brakes can absorb tremendous amounts of kinetic energy and yet have relatively low
weight.
Carbon Brake
This fabric is cut into strips on the bias,
meaning that the cords of the fabric run at
an angle of approximately 4531 to the
length of the strip.
CARCASS
It is made of specially compounded rubber
and has a pattern of grooves molded into
its surface to give the tire the required
traction characteristics according to the
type of runway surface the aircraft will
encounter.
tread
It is designed especially for use on hard surfaced runways and gives long tread
wear, good traction, and exceptionally
good directional stability.
RIB TREAD
The ______________ is a rubber covering that
extends from the tread down to the bead
heel to protect the carcass from injuries
such as cuts or bruises and from exposure to
moisture and ozone.
sidewall
Those have a rib tread in
the center and diamonds molded into the
shoulders.
All-weather treads
The _________________ was popular for tires used on airplanes with no
brakes, or for aircraft whose brakes were
used primarily as a taxi aid, rather than for
slowing the aircraft in its landing roll.
plain, or smooth, tread
