User manual

Page 39
Aircraft Operation Manual
Piper Cheyenne I, IA, II, IIXL
For ight simulation use only
Engine instruments
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2
3
4
5
6
7
8
Engine Instruments:
1: Engine Torque (digital readout on Cheyenne IIXL only)
Indicates the engine torque, calibrated in foot-pounds x 100.
2: Engine ITT
Indicates the interstage turbine temperature, calibrated in
degrees centigrade x 100, measured by probes between the
compressor turbine and power turbine
3: Propeller RPM
Indicates propeller speed (Np), calibrated in RPM x 100. The
rotational speed of the power turbine is lowered through
the reduction gearbox which drives the propeller. With
an indicated propeller speed of 2200 RPM, power turbine
speed (Np) is around 33.000 RPM (all values for Cheyenne II,
others may vary).
4: Compressor Turbine RPM
Indicates compressor turbine speed (Ng), calibrated in per-
cent. With a 100% indication, compressor turbine speed is
37.500 RPM. At the maximum indication of 101.5%, com-
pressor turbine speed is 38.100 RPM (all values for Cheyenne
II, others may vary)
5: Fuel ow (lbs. per hour)
Indicates the rate of fuel ow to the engine calibrated in
hundreds of pounds per hour
6: Fuel pressure (PSI)
Indicates fuel boost pump pressure to the engine calibrated
in PSI.
7: Oil pressure (PSI)
Indicates engine oil pressure, calibrated in PSI, transmitted
from the output of the oil pressure pump prior to the oil
entring the engine lubrication channels.
8: Oil temperature
Indicates engine oil temperature, calibrated in degrees cen-
tigrade, transmitted from the output of the oil pressure
pump prior to the oil entring the engine lubrication chan-
nels.