Piper Turbo Saratoga PA-32-301T Pilot's Manual page 167

PIPER
AIRCRAFT CORPORATION
SECTION
7
PA-32-301T, TURBO
SARATOGA DESCRIPTION
&
OPERATION
source
should
always be used for takeoff. If the primary
system,
including
the compressor unit, becomes blocked, an alternate air door located
downstream
of the compressor will open automatically due to the sucking
action of the engine.
An Airesearch turbocharger on the engine is operated by the engine
exhaust gases. The exhaust gases drive a turbine wheel which
is coaxial with
a compressor
impeller. Induction air entering the compressor impeller is
compressed
and flowed to the engine
induction
distribution
system and
subsequently
to
each cylinder.
The
amount of
induction
air compression
is a
function of engine power
-
low
power,
low compression;
high
power, higher
compression.
Excessive pressure and flow above the established limit is
expelled by the overboost valve previously discussed.
The fuel injection
system
incorporates a metering
system
which
measures the rate at which turbocharged air is being used
by
the engine and
dispenses fuel
to the cylinders proportionally. Injector nozzle and engine fuel
pump
pressure
is
referenced
to
deck
pressure
(turbocharger
blower
out-pressure).
A
combination fuel flow
indicator
and manifold
pressure
gauge is
installed in the left side of the instrument panel. The fuel flow gauge
is
a
differential pressure gauge connected to the fuel flow divider line and the
deck
pressure line. This gauge monitors the differential
pressure
described
with the readout converted
to indicate
fuel flow in gallons per hour.
To obtain maximum efficiency and time from the engine,
follow the
procedures recommended in the Lycoming Operators Manual provided
with
the
airplane.
The constant
speed
propeller
is controlled by
a governor mounted on the
left forward side of crankcase.
Control from the engine control quadrant is
provided by a push-pull
control.
ISSUED: JANUARY 10,
1980
REPORT: VB-1070
7-3