Undercarriage Configuration
1. Conventiol -Main wheel + tail wheel
2. Tricycle - Main wheel + nose wheel
3. Tandom. - Main wheel + out trigger wheels
Shock Struts
Shock struts are self-contained hydraulic units that support an aircraft on the ground and protect
the aircraft structure by absorbing and dissipating the tremendous shock loads of landing. Shock struts must be inspected and serviced regularly to function efficiently.
SHIMMY DAMPERS
A shimmy damper controls vibration, or shimmy, through hydraulic damping. The damper is either attached to or built integrally with the nose gear and prevents shimmy of the nosewheel during taxiing, landing, or takeoff. There are three types of shimmy dampers commonly used on aircraft:
(1)The piston type,
(2) vane type, and
(3) features incorporated in the nosewheel power steering system of some aircraft.
Steer Damper
A steer damper is hydraulically operaied and accomplishes the two separate functions of steering
and/or eliminating shimmying.
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