Century 2000 Pilots Operating Manual page 13

*GS mode may be entered from either ATT or ALT mode, from either
above or below the glideslope.
*Capture of the glideslope depends upon satisfying conditions which will
complete the arming sequence.
before glideslope interception so as to rotate smoothly to interception.
This "anticipative capture" point is determined by the rate of closure
satisfying a computer equation. In order for the GS mode to arm, the
following conditions must exist simultaneously:
1. No. 1 NAV radio channeled to localizer frequency.
2. Localizer deviation must be less than 90 percent either side of center.
3. A valid localizer signal (no flag).
4. A valid glideslope signal (no flag).
5. APR mode selected.
*When these conditions are met the GS annunciator will illuminate in
conjunction with the active pitch mode annunciator indicating glideslope
is armed.
*When "anticipative capturing" occurs, the active pitch mode annunciator
will extinguish leaving only the illuminated GS annunciator to indicate
that transition to the glideslope signal has occurred.
*The GS mode may be deactivated by selection of any other pitch mode
(ALT, ATT) but automatic recapture of the glideslope may occur in ALT or
ATT modes.
The NAV mode should be used when executing a holding pattern ton the
localizer to prevent automatic glideslope coupling.
When radio receiver is tuned to a localizer frequency, the coupler will
operate with localizer (APR) dynamics in the NAV mode.
After arming, capture will occur just
NOTES
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*CWS MODE (Pitch Sync) - The system is
equipped with a control wheel steering switch
located on the horn of the pilot's control wheel.
When depressed, this switch will disengage the
roll and pitch servos to
maneuvering.
*When released the system will re-engage in the
lateral (roll) mode previously in use.
*If the autopilot is in ALT mode the system will synchronize to the
indicated altitude present upon release of the CWS switch.
*If the Autopilot is in the ATT mode the system will synchronize to the
pitch attitude present at the time of release.
CENTURY 2000 WITH TRIM PROMPTING
The Century 2000 may be ordered as a Trim
TRIM
Prompting autopilot.
DN
control (autotrim) of the elevator trim is not
available on these system. When the autopilot
displays a flashing TRIM UP or TRIM DOWN on
the annunciator, the pilot should manually move
the trim control of his aircraft in the direction
indicated on the autopilot. When the autopilot
TRIM
determines that the trim condition is satisfied,
UP
the trim lamp on the annunciator will extinguish
and the pilot should stop his trim
action. There are 2 degrees of trim prompting. For a small trim error the
trim prompt will flash approximately once each second. A large trim error
will cause the prompt to flash approximately 3 times per second. A large
error not corrected for a period of approximately 2 minutes will sound an
alert for 5 seconds. The alert will repeat every 2 minutes until the large
error is corrected.
allow manual
This means automatic
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