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Volume 2 Flight Crew Operating Manual May 06/2005 CSP 100-6 REV 2
18-01-06 ENGINE CONTROL SYSTEM (Cont) THRUST CALCULATIONS
FADEC automatically computes a target thrust rating for thrust lever position and presents the target or maximum value on the N1 indicator.
On the ground, normal rated takeoff thrust is automatically calculated when an engine is started. Normal rated N1 takeoff rpm is continuously updated for changes in the Mach number, delta ambient temperature, and pressure altitude.
During the takeoff roll, the N1 normal rated takeoff thrust value is continuously updated as the aircraft accelerates. At 65 kt discrete inputs for the thrust calculations are locked in. The calculation is unlocked when the aircraft altitude exceeds 400 ft. AGL or the thrust lever is retarded from the TO detent.
The cyan color target N1 appears on the N1 indicator as:
-N1 caret (doughnut for cruise power)
-N1 digital reference
-Thrust mode annunciation
THRUST MODE ANNUNCIATION
The thrust mode annunciation identifies the position of the thrust lever during most phases of operation or a specific armed condition.
With both engines operating, the following thrust mode annunciations are presented:
-APR
-TO
-CLB
-CRZ
-REV
MAX POWER (APR)
When either or both thrust levers are placed in the APR detent, the FADEC increases the engine thrust to automatic power reserve power (APR). The APR power setting is an emergency thrust setting.
To protect against inadvertent APR activation, the pilot must apply increased force to move the thrust lever forward to the APR detent.
APR thrust is indicated on the associated N1 gauge by:
-Cyan caret
-Cyan N1 digital reference
-Cyan APR icon
AUTO APR FUNCTION
-AUTO APR function indications are the same as APR indications. If the aircrew elects to disable the AUTO APR function, an AUTO APR OFF (S) CAS message is displayed and the AUTO APR OFF switch is illuminated.
NORMAL-RATED TAKEOFF N1 INDICATIONS (TO)
Normal-rated takeoff thrust is automatically calculated by FADEC when electrical power is applied to the aircraft on the ground. Takeoff thrust is set on the takeoff roll by placing the thrust levers in the TO detent.
The programmed normal-rated takeoff thrust value is displayed on the MFD by the following indications:
-Cyan caret
-Cyan N1 digital reference
-Cyan TO thrust mode annunciation for takeoff thrust
May 06/2005 Flight Crew Operating Manual Volume 2 REV 2 CSP 100-6
18-01-07 ENGINE CONTROL SYSTEM (Cont)
CLIMB THRUST (CLB)
When the thrust lever is placed in the CLB detent, the FADEC electronically programs the engine to accelerate or decelerate to the climb thrust setting.
The programmed climb thrust value is displayed on the MFD EICAS by the following indications:
-Cyan caret
-Cyan N1 digital reference
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