King Air C90GTi, Pilot Training Manual

Page: 287 / 557

LANDING GEAR
SYSTEM
LANDING GEAR ASSEMBLIES
Components
Each landing gear assembly (main and nose)
consists of a shock str ut, torque knee (scis-
sors), drag leg, actuator, wheel, and tire.
Brake assemblies are located on the main
g e a r a s s e m b l i e s ; t h e s h i m my d a m p e r i s
mounted on the nose gear assembly (Figures
14-1 and 14-2).
Operation
The upper end of the drag legs and two points
on the shock str uts are attached to the air-
plane str ucture. When the gear is extended,
the drag braces are rigid components of the
gear assemblies.
The landing gear incor porates Beech air/oil
shock str uts that are f illed with both com-
pressed air and hydraulic fluid. Air plane
weight is borne by the air charge in the shock
str uts. At touchdown, the lower por tion of
each str ut is forced into the upper cylinder;
this moves fluid through an orif ice, fur ther
c o m p r e s s i n g t h e a i r c h a rg e a n d t h u s a b -
sorbing landing shock. Orif ice action also
reduces bounce during landing. At takeoff,
the lower por tion of the str ut extends until
an inter nal stop engages.
A torque knee connects the upper and lower
por tions of the shock str ut. It allows str ut
compression and extension but resists ro-
tational forces, thereby keeping the wheels
aligned with the longitudinal axis of the air-
plane. On the nose gear assembly, the torque
knee also transmits steering motion to the
nosewheel, and nosewheel shimmy motion
to the shimmy damper.
KING AIR C90GTi/C90GTx PILOT TRAINING MANUAL
14-2
FOR TRAINING PURPOSES ONLY
14
LANDING
GEAR
AND
BRAKES
Figure 14-1. Main Gear Assembly Figure 14-2. Nose Gear Assembly