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SECTION II
CHEROKEE '140 "D"
STRUCTURES
All
structures
are
of aluminum
alloy
construction
and
are
designed
to
ultimate
load factors
well
in
excess
of
normal
requirements.
All
exterior
surfaces
are
primed
with
etching
primer
and
painted
with
acrylic
lacquer.
The
wings
are attached
to each side
of
the
fuselage
by
inserting
the
butt
ends of the
respective
main spars
into
a
spar
box
carry
through
which
is
an
integral
part
of
the
fuselage
structure,
providing, in
effect,
a
continuous
main
spar
with
splices
at
each side of the
fuselage.
There
are
also
fore
and
aft attachments
at the rear spar and at an
auxiliary
front
spar.
The
wing
airfoil section
is
a
laminar flow
type, NACA652-415
with
the maximum
thickness
about 40% aft of the
leading
edge. This
permits
the main spar carry through
structure
to
be located
under
the rear seat
providing
unobstructed
cabin
floor
space ahead of the rear seat.
LANDING
GEAR
The three
landing gears
use a Cleveland
6.00
x
6 wheel, the
main
wheels
being provided
with
brake drums
and Cleveland
single
disc
hydraulic brake
assemblies.
The
nose
wheel and the main
gear both
use
6.00
x
6 four ply
tires. All the tires
have
tubes.
The nose
gear
is steerable
through
a
.44°
arc
by
use of the rudder
pedals.
A
spring
device
is
incorporated in
the rudder
pedal
torque
tube
assembly
to aid
in
rudder
centering
and
to
provide
rudder
trim. The
nose
gear
steering
mechanism
also
incorporates
a hydraulic
shimmy
dampener.
The oleo struts
are
of
the
air-oil type with
normal
extension
being
3.25 inches for
the
nose
gear
and
4.50 inches for
the
main
gear
under
normal static (empty
weight of airplane
plus full fuel
and oii)
load.
The
brakes
are
actuated
by
a
hand lever
and a master
cylinder
which
is located below
and near the center of the
instrument panel.
The
toe
brakes
and the
hand lever
have their own
brake
cylinders
but
they
both
use a common
reservoir.
The
parking
brake
is incorporated
in the
lever brake
and
is
operated
by pulling back
on
the
lever
and
depressing
the
knob
attached
to
the top of the handle.
To release
the
parking
6
700801
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