CESSNA
SECTION 7
MODEL 172S NAV III
AIRPLANE AND SYSTEM DESCRIPTION
KAP 140 AUTOPILOT
U.S.
ENGINE
(Continued)
EXHAUST SYSTEM
Exhaust gas from each cylinder passes through a riser assembly to a
common muffler, located below the engine, and then overboard through
a single tailpipe. Outside air is supplied to a shroud constructed around
the outside of the muffler to form a heating chamber. The air heated by
the shroud is then supplied to the cabin.
FUEL INJECTION SYSTEM
The engine is equipped with a fuel injection system. The system is
comprised of an engine driven fuel pump, fuel/air control unit, fuel
manifold, fuel flow indicator, and air-bleed type injector nozzles.
Fuel is delivered by the engine driven fuel pump to the fuel/air control
unit. The fuel/air control unit correctly proportions the fuel flow to the
induction air flow. After passing through the control unit, induction air is
delivered to the cylinders through the intake manifold tubes and
metered fuel is delivered to a fuel manifold (flow divider). The fuel
manifold, through spring tension on a diaphragm and valve, evenly
distributes the fuel to an air-bleed type injector nozzle in the intake
valve chamber of each cylinder. A turbine-type fuel flow transducer
mounted between the fuel/air control unit and the fuel distribution unit
produces a digital signal that displays fuel flow on the EIS pages.
COOLING SYSTEM
Ram air for engine cooling enters through two intake openings in the
front of the engine cowling. The cooling air is directed from above the
engine, around the cylinders and other areas of the engine by baffling,
and then exits through an opening at the bottom aft edge of the engine
cowling.
A winterization kit is available for the airplane. Refer to Section 9,
Supplement 4 for description and operating information.
PROPELLER
The airplane is equipped with a two bladed, fixed pitch, one-piece
forged aluminum alloy propeller which is anodized to retard corrosion.
The propeller is 76 inches in diameter.
172SPHAUS-05
7-37
For
Training
Purposes
Only
Содержание Cessna 172S NAV III Skyhawk SP
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