Engine And Propeller; Structures - Piper CHEROKEE 180 Owner's Handbook Manual

CHEROKEE 180 SECTION 11
SECTION 11
DESIGN INFORMATION
ENGINE AND PROPELLER
The Cherokee
180
is powered by
a Lycoming
O-360-A4A
four
cylinder,
direct drive,
horizontally
opposed
engine rated
at 180 HP at
2700 RPM. It is furnished
with a starter,
60
ampere
12
volt alternator,
shielded
ignition,
vacuum
pump drive, fuel pump,
and a
dry,
automotive
type
carburetor air
filter.
The exhaust
system
is of
the
cross-over
type to reduce
back
pressure
and
improve
performance,
It is made entirely from stainless
steel
and
is equipped
with
dual
mufflers. A heater
shroud
around the
mufflers
is
provided
to
supply heat
for
the
cabin
and
windshield
defrosting.
The Sensenich 76EM8S5-0-60
fixed-pitch
propeller is
made
from
a
one-piece alloy
forging.
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.
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