Engine And Propeller - Piper WARRIOR III PA-28-161 Pilot Operating Handbook

SECTION 7
DESCRIPTION & OPERATION
A vertical stabilizer, an all-movable horizontal stabilator, and a rudder
make up the empennage. The stabilator incorporates an anti-servo tab which
improves longitudinal stability and provides longitudinal trim. This tab
moves in the same direction as the stabilator, but with increased travel.

7.5 ENGINE AND PROPELLER

The PA-28-161 is powered by a four cylinder, direct drive, horizontally
opposed engine rated at 160 HP at 2700 RPM. It is equipped with a starter, a
60 amp 28 volt alternator, a shielded ignition, two magnetos, vacuum pump
drive, a fuel pump, and a wetted polyurethane foam induction air filter.
The engine compartment is accessible for inspection through top-hinged
side panels on either side of the engine cowlings. The engine cowlings are
cantilever structures attached at the fire wall. The engine mounts are
constructed of steel tubing, and dynafocal mounts are provided to reduce
vibration.
The exhaust system is constructed of stainless steel and incorporates
dual mufflers with heater shrouds to supply heated air for the cabin, the
defroster system and the carburetor deicing system.
An oil cooler is located on the left rear of the engine mounted to the
engine baffling. Engine cooling air, which is picked up in the nose section of
the engine cowling and carried through the baffling, is utilized on the left side
for the oil cooler. A winterization plate is provided to restrict air during
winter operation (refer to Section 8).
Engine air enters on either side of the propeller through openings in a
nose cowling and is carried through the engine baffling around the engine
and oil cooler. Air for the muffler shroud is also picked up from the nose
cowling and carried through a duct to the shroud. Carburetor induction air
enters a chin scoop on the lower right cowling and is passed through a wetted
polyurethane filter to the carburetor air box. Heated air enters the carburetor
air box through a hose connected to the heater shroud.
A fixed pitch propeller is installed as standard equipment. The propeller
has a 74-inch diameter with a 60-inch pitch. The pitch is determined at 75%
of the diameter. The propeller is made of an aluminum alloy construction.
The pilot should read and follow the procedures recommended in the
Lycoming Operator's Manual for this engine in order to obtain maximum
engine efficiency and time between engine overhauls.
REPORT: VB-1565
7-2
PIPER AIRCRAFT CORPORATION
PA-28-161, WARRIOR III
ISSUED: JULY 1, 1994