Piper Cherokee 140 - Page 16

SECTION
II
THE PIPER CHEROKEE
for stopping
the
engine. Intermediate
posltlons
are
used
for
leåning
the mlxture
at ahitudes above
sea-level, The
carbu-
retor heat
control,
located
to the
left
of the thronle,
provides
maximum
carburetor heat when
pul.led
to
its
full aft
position.
With
carburetor heat off,
all eugine air
passes
througtt a high-
efficiency
dry-type filter.
Therefore,
prolonged
ground oper-
atlon with
carburetorheat"ON" should
be avoided,
particularly
on unlmproved
ftelds as
the
alr
is not
flltercd.
STRUCTURES
All
structures are
of
alumlnum
alloy
conatnrctlon
and
are
deslgned to ultlmate
loed factors
weU in
excess of
normal
re-
quirement§.
All
exterior surfaces
are
prtmed
with
etchlng
prlmer
and
painted
wlth
acrylic
enarnel.
The wlngs
are
attached
to each elde
of the
fuselage by
In-
serting
the butt ends
of the
respective main spars
into a spar
box carry through which is an
integral
part
of
the
fuselage
sfruc-
ture,
provlding.
ln
effect, a contlnuoua main
spar
urith
spllces
at each slde
of the
fuselage. There are also
fore and
aft at-
tachments
at the rear
spar
and
at an
auxlliary frmt
epar.
The
wing
airfoil
section
is
a l,aminar
flow type,
NACA
652-4fS
wlth
the
maximum thicknessabout
40% aft
of
the
tread-
ing
edge.
This
permlts
the main spar
carrythrough
structure
to
be
located under
the
rear seat
providlng
unobstructed
cabln
floor space
ahead
of
the
rear seat.
TANDING
GEAR
The thtee landing
gears
use a Clevelaod
6O0
x 6
wheel' tbe
main wheels
belng
provtded
with
brake drums and
Cleveland
single disc hydraul.ic
brake
assemblies.
The
nose
wheel and
the
67m3r