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AFCS non-FLC – If vertical mode is selected, and the AFCS speed bug is selected higher than the current airspeed, the ATS transitions to speed mode and captures and tracks the AFCS airspeed reference. The SPEED message replaces the N1 CLB message in the MSD. If vertical mode is selected, and the AFCS speed bug is selected below the current airspeed, the ATS remains in N1 mode and tracks the FMS thrust limit.
If the ATS is engaged in flight with no AFCS vertical mode selected, the ATS engages in speed mode. When wing and/or cowl anti-ice is selected at or above 30,000 ft, the ATS posts a FAIL message, and disengages.
ATS Climb Figure 04.10.51
N1 Thrust Target
If target (TGT) is set on the FMS “THRUST LIMIT” page, the target N1 percentage can be set from 76 to 98.5. The ATS will set engine thrust to this target regardless of the aircraft’s operating limit. Note that this mode is not available for ATS takeoff.
Cruise
Desired cruise airspeed is set with the AFCS airspeed reference (speed bug) and desired thrust limit in the FMS “THRUST LIMIT” page. The SPEED message is displayed in the ATS mode status display. The aircraft accelerates with the selected thrust limits until the AFCS airspeed reference is attained. The ATS then reduces thrust as necessary to hold the AFCS airspeed reference.
N2 Sync
N2synchronization is available if the following conditions are met:
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Autopilot is engaged;
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AFCS altitude hold is engaged;
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ATS is in speed mode;
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Airspeed is stabilized at the airspeed reference (speed bug);
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Airspeed reference in Mach is displayed on the PFD; and
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Engine N1 fan speeds are within 0.6% at the time of engagement.
AUTOMATIC FLIGHT CONTROL SYSTEM Description Vol. 2 04.10.66
Oct 05/06
NOTE
All parameters must be stable for a minimum of 30 seconds prior to N2 SYNC engagement.
When the N2 SYNC pushbutton is engaged, the SPEED N2 message is displayed on the ATS mode status display. The system returns to N1 synchronization mode for any of the following conditions:
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Pressing the N2 SYNC pushbutton a second time after engagement;
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Changing the AFCS airspeed reference; or
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Airspeed changes more than 20 KIAS since N2 SYNC was engaged.
ATS Cruise Figure 04.10.52
Descent
Descent operation in the AFCS flight level change (FLC) mode:
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DESCENT message displayed in the MSD;
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Four.second thrust reduction will occur, then servo commands stop; and
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ATS control panel green LEDs extinguish.
The throttle levers must be controlled manually to set engine thrust, to accomplish the desired descent rate.
Descent operation in non-FLC mode:
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本文链接地址：庞巴迪挑战者605公务机机组操作手册 CL605-AUTOMATIC_FLIGHT_CONTROL_SYSTEM(27)
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