BendixKing KFC 500 - Manual (Page 12)

SCAS/Autopilot Disconnect
The cyclic mounted dual contact
(separate power, primary/secondary)
AFCS DISC switch when pushed
disconnects the selected AP and/or
SCAS mode if engaged. This switch
provides the pilot or copilot a quick
and easy means to disconnect either
of these two control coupled modes
of the selected system.
Force Trim Release (FTR)
The cyclic FTR switch is a double
pole single detent switch interrupting
Force Trim 1 Power when the pri-
mary system is selected and inter-
rupting Force Trim 2 Power when
the secondary system is selected.
Switch actuation allows the pitch, roll
and yaw clutches to be released for
free cyclic and anti-torque pedal
movement. Pushing and releasing
the FTR switch when the autopilot
mode is on (attitude hold), causes
the system to synchronize its refer-
ence attitude and heading with the
present helicopter attitude and head-
ing. When the FTR switch is
pressed, the AFCS will temporarily
revert to SCAS (when AP is
engaged) and the trim servo mag-
netic clutches will release eliminating
the artificial feel system and allowing
the pilot or copilot free movement of
the cyclic. When the switch is
released the AP and trim clutch re-
engages. The Force Trim System
Power must be on to the selected
system for the AP mode to engage.
(Also the Force Trim Detent
switches, in the force feel system,
must not be activated for the primary
AP mode to engage).
Normal Operation
15 006-18081-0000 March 27, 1998
Normal Operation
14 March 27, 1998 006-18081-0000
FTR
Activating Discrete or Continuous Lateral Command has the following effect
upon the command reference for autopilot operation:
Pitch Command Control
Using the same cyclic beep switch
as mentioned in the previous para-
graph, the autopilot’s reference pitch
attitude can be modified by moving
the pitch command switch fore or aft.
Moving the switch forward adjusts
the helicopter’s pitch attitude down-
ward, while moving it aft adjusts the
attitude upward.
Activating Discrete or Continuous Pitch Command has the following effect
upon the command reference for autopilot operation:
Autopilot Lateral Command Values
Discrete Command System Response
Roll Attitude If within ± 6° of level flight: First Click=6°,
Subsequent=1° per click
If greater than ± 6° of level flight: Each
click=1° per click
Continuous Command
Roll Attitude Roll Rate of 7° per second
CBT
Autopilot Pitch Command Values
Discrete Command System Response
Pitch Attitude 0.5° per click
Continuous Command
Pitch Attitude Maintains constant. acceleration profile
of 0.1 g or 2° per second whichever is
less until release
AFCS DISC