BendixKing KFC 500 - Manual (Page 17)

Normal Operation
24 February 15, 1996 006-08769-0000
Normal Operation
25 006-08769-0000 June 15, 1999
Activating Discrete or Continuous Lateral Command has the following effect
upon command values in flight director operations:
Vertical Command Control
Using the same cyclic switch as
mentioned in the previous para-
graph, vertical commands can be
modified by moving the CBT switch
fore or aft. Operation of the Vertical
Command Control depends on the
flight director mode engaged.
Moving the switch forward adjusts
the helicopter’s pitch attitude down-
ward, while moving it aft (rearward)
adjusts the attitude upward.
Activating Vertical Command has the
following effect on flight director verti-
cal modes: has no effect on ALT
ARM (altitude preselect arm), ALTC
(altitude capture), GS (glideslope),
GA (go around), overspeed protec-
tion (nose down or “increasing air-
speed”), and autolevel. To use
Vertical Command Control when
these modes are engaged, first des-
elect the mode. Vertical Command
will trim or modify the reference for
PIT (pitch attitude hold), ALT (alti-
Force Trim Release (FTR)
When the Flight Director is active,
and coupled to the autopilot (AP
ON), the Force Trim Release switch
allows the crew to synchronize flight
director commands in pitch and roll
to the actual helicopter position.
When the selected mode for flight
director is pitch attitude hold, altitude
hold, airspeed hold, vertical speed
hold, roll level/heading hold, or roll
attitude hold, pushing FTR will cause
a new flight director reference to be
established upon release of the
switch. All commands will then be
directed to hold this new reference. If
the AFCS is in APR mode and GS
track, pressing the FTR will have no
effect. If the AFCS has reverted to
overspeed protection mode, the FTR
switch is pushed and held, and the
pilot manually reduces airspeed to a
value below VNE, upon FTR release
the system will revert to the previ-
ously engaged pitch mode. Pressing
the FTR switch will have no effect on
ALT ARM, ALT capture, Go Around,
Autolevel, HDG select, NAV or APR
modes including GS. Upon release
of the FTR switch, the flight director
will provide commands to return to
the above modes.
Flight Director Lateral Command Values
Discrete Command System Response
Roll Attitude Hold First Click=6°, Subsequent=1° per click
Heading Select 1° Heading Bug novement per click
Continuous Command
Roll Attitude Hold Constant Roll Rate
Heading Select 16° Heading Bug movement per second
Flight Director Vertical Command Values
Discrete Command System Response
Pitch Attitude 0.5° per click
Altitude Hold 10 feet per click
Indicated Airspeed Hold 1 Knot per Click
Vertical Speed Hold 100 feet per minute per click
Continuous Command
Pitch Attitude Maintains constant. acceleration profile
until release
Altitude Hold 50 feet per second until release
Indicated Airspeed Hold 5 knots per second until release
Vertical Speed Hold 300 feet per minute per second until
release
tude hold), VS (vertical speed hold),
IAS (indicated airspeed hold) and
overspeed protection (nose up or
“decreasing airspeed”). Attitude
Hold, Altitude Hold, Indicated
Airspeed Hold, and Vertical Speed
Hold will remain coupled throughout
Vertical Command (CBT) operation.
Activating Discrete or Continuous Vertical Command Control has the following
effect upon command values in flight director operations:
CBT
FTR