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CHEROKEE 140
"D"
SECTION II
SECTION
11
DESIGN INFORMATION
ENGINE AND PROPELLER
The
Lycoming
O-320-E2A
engine
installed in
the
Cherokee
PA-28-140
is
rated
at
140
horsepower
at 2450 rpm or 150
horsepower
at
2700
rpm.
This engine
has
a compression
ratio of 7 to 1 and requires
80/87
minimum
octane
fuel.
The engine
is
equipped
with
direct drive
or
optional
geared drive
starter.
A 60 ampere
alternator,
dual
magnetos,
vacuum
pump drive, diaphragm
type
fuel pump
and a
float
carburetor.
Exhaust
gases
are carried
through
a system
constructed
of
heavy
gauge
stainless
steel
which
incorporates
a
heater
shroud,
to
provide
cabin
heat, defrosting
and carburetor
deicing.
The
propeller
used
on
the
PA-28-140
is
a Sensenich
M74DM
fixed-pitch
aluminum
alloy
unit.
Its
diameter
is
74
inches
with
a
standard
pitch
of
58 inches.
All
performance figures
are
based
on the
standard
58 inch pitch propeller.
Cowling
on the Cherokee
is designed
to cool
the engine
in
all
normal
flight
conditions,
including protracted
climb,
without
the
use
of
cowl
flaps
or cooling
flanges.
The
throttle
quadrant
is in
the
lower
center
of the
instrument
panel
and contains
the throttle
and mixture
control.
A
friction lock
on
the
right
side
of
the
quadrant prevents
creeping
of the
controls.
To the
right
of the
quadrant
is
the
carburetor
heat
control
that
provides
maximum
carburetor
heat
when
fully
ON. Avoid
prolonged ground
operation
with
carburetor
heat
ON
as
the
air
is
unfiltered.
Air
passes
through
a
highly
efficient
dry
type
filter
when the carburetor
heat is
OFF.
700801
5
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