Cessna 172N - Page 114

SECTION
7
AIRPLANE
& SYSTEMS
DESCRIPTIONS
CESSNA
MODEL 172N
bellcrank,
Ieft upper
and
Iower
and
lower
"V"
type
corrugated
for
the trim
tab. The
elevator
and lower
'V"
type
corrugated
right
elevator tips
incorporate
"V"
type
corrugated
skins, and
right
upper
skins
incorporating a trailing
edge cut-out
trim tab consists
of
a
spar, rib, and
upper
skins"
The
leading edge of
both left
and
extensions
which
contain balance weights.
FTIGHT
C
ONTR
OLS
The airplane's
flight control
system consists
of
conventional aileron,
rudder,
and
elevator
control
surfaces
(see
figure ?-1).
The control sur-
faces are
manually
operated
through
mechanical linkage using a
control
wheel
for
the ailerons
and
elevator, and
nrdder/brake
pedals
for
the
rud-
der.
TRI'II
SYSTEIU
A manually-operated elevator trim system
is
provided; a rudder
trim
system may
also be
installed
(see
figure
7-1).
Elevator
trimming
is
accomplished
through the
elevator
trim
tab
by utilizing
the vertical-
ly mounted trim
control wheel.
Forward
rotation of
the
trim wheel
will
trim
nose-down;
conversely,
aft
rotation
wiII
trim nose-up.
Rudder
trimming
is accomplished
through
a bungee
connected
to the rudder
control
system
and a trim
lever, mounted
on
the control
pedestal.
Rudder
trimming
is accomplished by lifting
the
trim
lever up to
clear
a
detent,
then
moving it
either
left
or
right
to the
desired trim
position.
Moving
the
trim
lever to the right
wiII trim
the
airplane
nose-right;
conversely,
moving the lever
to the
left
will trim the
airplane
nose-Ieft.
INSTRUMENT
PANEL
The
i,nstrument
panel
(see
figure
7-2)
is designed around
the basic
"T"configuration.
The
gyros
are
located immediately in front of
the
pilot,
and arranged vertically
over
the control
column. The airspeed
indicator
and altimeter
are Iocated to
the
left
and
right
of the
gyros,
respectively.
The remainder
of
the flight instruments
are
located
around
the
basic
"T".
Engine
instruments
and
fuel
quantity
indicators
are
near
the left
edge of the
panel.
Avionics
equipment
is stacked
approximately
on the centerline
of
the
panel, with
the right
side of the
panel
containing
space for
additional
instruments
and
avionics equip-
ment.
A subpanel
under
the
primary
instrument
panel
contains
the
primer,
master
and ignition
switches,
circuit
breakers,
and
electrical
switches
on
the
Ieft
side, with
the engine controls,
light
intensity
con-
trols,
and alternate
static
air control
in
the
center,
over
the control
7-8