Mr. Schmahl
Landing Gear
• 1903 Wright Flyer had simple landing
gear.
• Inventors later turned to bicycle wheels to
support the airframe.
• To land on water same designers
equipped their flying machines with floats.
Purpose:
–To support the aircraft on the
ground on a surface (Land,
Water, Ice, Roof, etc… )
–May include any combination of
wheels, floats, skis, shock
absorbing equipment, etc…
Conventional Gear
• Two main wheels are attached to the
airframe, ahead of the center of gravity to
support most of the aircraft weight.
• A small tail-skid or wheel at the very back
of the fuselage provides a third point of
support.
• This arrangement allows for long
propellers and provides the lightest-weight
landing gear available.
Conventional Gear
• Before hard-surface runways became
commonplace, a steel-shoed tail-skid
provided adequate braking.
• A conventional gear airplanes are used for
special purposes such as agricultural
operations.
• A conventional landing gear is preferred
for rough field applications rugged or
muddy sod surface
• Limited visibility
• Limited braking
• Limited ground maneuver
• When the Center of Gravity is aft of the
main gears the aircraft has a tendency to
go into a tail spin on the ground.
Conventional Gear
Tricycle Landing Gear
• In this configuration the nose wheel is
installed in the front of the airplane and
two main wheels are moved behind the
center of gravity.
• Steering is accomplished through
connection of the nose wheel and the
rudder pedals.
Tricycle Gear
BOGIE – more than 2 wheels per axle
Tire
Provides traction and cushion by the use
of air that helps support the aircraft on the
ground.
Types of Tires
Tube
Tubeless
TIRE
INNER TUBE
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Tire Servicing
Aircraft manual takes presidence over tire
manufacturer’s manual.
Tire pressure should be checked daily.
Checked 2-3 hours after landing.
Tire Inspection
Over inflation / Under Inflation
Tread separation
Cuts
Flat Spots
Removal of Foreign Objects
Storing Tires
• 1. Do not hang tires or tubes over nails or
pegs.
• 2. Stack tires on top of one another for
long periods
• 3. store tires in cool dark dry place avoid
direct sun light
Storage
Types of
aircraft jacks
Axle
Tripod
Purpose
Aircraft wheels provide the mounting for
tires.
Material
Type of wheels
Split
Removable
Flange
Drop center
fixed flange
Parts associated with wheels
Bead seat
Bearings
Fusible plugs
Bead seat
The highly stressed portion of a wheel
where the bead of the tire sits against the
wheel.
The most critical part of a wheel because it
has to withstand the forces applied by the
tire.
A low-melting-point alloy in the
center of a plug that melts and safely
releases the pressure from the tire
when it is subjected to extreme heat.
Prevents tires from exploding.
Attached to the inboard half of the
wheel.
Fuse plug
Tire Video
• http://eaavideo.org/video.aspx?v=8636787
4001
• http://eaavideo.org/video.aspx?v=7847778
19001
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