BendixKing KFC 500 - Manual (Page 37)

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Altitude Select/Density Altitude —
Provides continuous display of alti-
tudes selected for altitude alerting
and flight director capture and track-
ing, or momentary display of current
density altitude derived by the
Central Air Data Computer.
Preselected altitudes are displayed
in 100-foot increments.
The current density altitude dis-
plays for approximately five seconds
at the end of the air data system’s
preflight test function. Pressing the
Push Baro Test pushbutton twice in
rapid succession summons the den-
sity altitude display at any time.
Altitude/Vertical Speed Preselect
Control
— Dual, concentric knobs
control altitude and vertical speed
preselection. To preselect altitude,
press the smaller knob to ensure it is
in the inner position. Rotating the
smaller knob adjusts the preselected
altitude in 100-foot increments, with
automatic roll-over to higher values.
The outer knob adjusts altitude in
1000-foot increments. The aircraft
may have only one selected altitude
at a given time. The pilot has priority
over the copilot controller if used at
the same time, however, the last per-
son to select the value provides the
active selected altitude.
Pulling the smaller knob to its
outer position initializes the vertical
speed bug (5), synchronizing it with
the last vertical speed selected and
references the control knobs to verti-
cal speed. The smaller knob adjusts
selections in 100-fpm increments,
with automatic rollover. The larger
knob adjusts selections in 1000-fpm
increments.
Altitude Alert — Illuminates when
the aircraft’s current altitude is within
200-1000 feet of the value specified
in the altitude preselect display. Upon
reaching the selected altitude, the
Alert annunciator lights again, briefly.
An aural alert sounds upon illumina-
tion of the pilot’s annunciator at 1,000
feet before and 200 feet outside the
selected altitude.
Instantaneous Vertical Speed
Indicator (IVSI)
— Displays instanta-
neous vertical speed with 100-foot
resolution for values less than 1000
fpm up or down; and with 500-foot
resolution for larger values to 3,500
fpm.
VS Flag — Appearance of the “VS”
flag indicates an invalid IVSI display.
Vertical Speed Bug — Indicates
present vertical speed selection.
Concealed behind the shroud at the
IVSI’s three o’clock position prior to
activation, upon activation the bug
moves to the vertical speed refer-
ence. Vertical speed references may
be selected with the KAV 485’s
Altitude/Vertical Speed Preselect
Control; alternatively, pressing the
Force Trim Release Pushbutton with
the KFC 500 in the Vertical Speed
mode synchronizes the bug with the
aircraft’s current vertical speed. The
CBT switch may also be used to
change the reference in Vertical
Speed mode. The VS bug will move
respectively.