SECTION 7
AIRPLANE
&
SYSTEMS DESCRIPTION
CESSNA
MODEL 172S
The empennage
(tail assembly) consists of a conventional
verti-
cal stabilizer, rudder, horizontal stabilizer, and elevator. The vertical
stabilizer consists of a spar, formed sheet metal ribs and reinforce-
ments, a wraparound
skin panel, formed leading edge skin and a
. dorsal. The rudder'is constructed of a formed leading edge skin and
. spar with attached hinge brackets and ribs, a center spar" a wrap
around skin, and a ground adjustable trim tab at the base of the
trailing edge. The top of the rudder incorporates a leading edge ex-
tension which contains a balance weight.
The horizontal stabilizer is constructed of a forward and aft spar,
ribs and stiffeners, center, left, and right wrap around. skin panels,
and
formed
leading
edge
skins.
The
horizontal
stabilizer'
also
contains the elevator trim tab actuator.
Construction'
of the ele.vator consists
of formed
leading
edge
skins, a forward spar, aft channel, ribs, torque tube and bellcrank,
left upper and lower "V" type corrugated skins, and. right upper and
lower "V" type corrugated s.kins incorporating
a trailing edge cutout
for
the
trim
tab.
The
elevator
tip
leading
edge. extensions
incorporate
balance weights.
The elevator trim tab consists of a
spar, rib, and upper and lower
"V"
type corrugated skins.
FLIGHT CONTROLS
The airplane's flight control system (Refer to Figure 7-1) consists
of conventional
aileron, rudder, and elevator control surfaces. The
control
surfacesr-are
manually
operated
through
cables
and
mechanical
linkage
using
a control
wheel
for the
ailerons
and
elevator, and rudder/brake pedals for. the rudder.
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.
July 8/98
Содержание Cessna 172S Skyhawk SP
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