Flight Controls; Trim System - Cessna 172R Operating Handbook

SECTION 7
AIRPLANE
& SYSTEMS DESCRIPTION
The empennage (tail assembly) consists of
cal
stabilizer, rudder, horizontal stabilizer,
stabilizer consists of a
a wraparound skin panel, formed leading
ments,
dorsal. The rudder is constructed of a formed leading
spar
with attached hinge brackets and ribs, a center
around skin, and a ground adjustable trim tab
trailing edge. The
tension which contains a balance weight.
The horizontal
ribs and stiffeners,
and formed leading edge skins. The
contains the elevator trim tab actuator.
Construction of the elevator consists of formed leading edge
skins, a forward spar, aft channel, ribs, torque tube
left upper and lower "V"
lower "V"
type corrugated
for the trim tab. The elevator tip leading edge extensions
balance weights.
upper and lower "V"

FLIGHT CONTROLS

The airplane's flight control system (Refer to Figure 7-1) consists
of conventional aileron, rudder, and elevator control surfaces. The
control surfaces are manually operated through cables and
mechanical linkage using a
elevator, and rudder/brake pedals

TRIM SYSTEM

A manually operated elevator trim system is provided (Refer to
Figure 7-1). Elevator trimming is accomplished through the elevator
trim tab by utilizing the vertically mounted trim control wheel in the
cockpit. Forward rotation of the trim wheel will trim nose down;
conversely, aft rotation will trim nose up.
7-6
spar, formed
the rudder incorporates a leading edge ex¬
top of
stabilizer is constructed of a forward and aft spar,
and right wrap
left,
center,
type corrugated skins,
skins incorporating a trailing edge cutout
The elevator trim tab consists of a spar,
type corrugated
control wheel for the ailerons and
a
and elevator. The vertica
sheet metal ribs and reinforce
at
around
horizontal stabilizer also
and right upper and
skins.
the rudder.
for
CESSNA
MODEL 172R
conventional verti¬
edge skin and
edge skin and
spar, a wrap
the base of the
skin panels,
and bellcrank,
incorporate
rib, and
Dec 2/96
a
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