User manual

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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 reduc-
tion 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 percent. With a 100% indication,
compressor turbine speed is 37.500 RPM. At
the maximum indication of 101.5%, compressor
turbine speed is 38.100 RPM (all values for
Cheyenne II, others may vary)
5: Fuel flow (lbs. per hour)
Indicates the rate of fuel flow 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.