BendixKing KFC 500 User Manual

Page 19

the absence of a preselected vertical
speed, engaging the mode will cause
the flight director to command a
climb or descent at the current heli-
copter vertical speed. In addition,
vertical speed commands may be
modified through use of the autopilot
CBT switch. The vertical speed
select (VS SEL) knob on the
Altimeter/Vertical Speed Indicator
changes selected vertical speed. The
small knob changes the vertical
speed 100 fpm per click and the
large knob 1000 fpm per click.

When VS mode is engaged or

the preselect function of the
Altimeter/Vertical Speed Indicator is
activated, an orange bug appears on
the vertical speed scale. The vertical
command switch or the VS SEL
knob on the KAV 485 repositions the
bug for reference for the pilot and
autopilot (the small knob must be
pulled out). A flashing VS Lamp on
the mode select panel above VS
indicates loss of a sensor required to
hold selected vertical speed (e.g.
invalid vertical speed). Flashing con-
tinues until the VS pushbutton is
pushed (pilot acknowledgement of
mode loss). The VS pushbutton may
also be used to deactivate the verti-
cal speed mode.

Note:

A flashing lamp may also be

extinguished by selecting another
mode of the same axis. Depressing
the pushbutton under the flashing
annunciation verifies the acceptance
of the default mode either wings level
or pitch attitude hold.

ALT

1000 FT/MIN

IN HG HPa

DEN ALT

SEL

ENG

SEL

BARO

P SH

S T

SEL

P LL

V S

KAV 485

Vertical Speed Select

Vertical Speed Bug