Table of Contents
Advertisement
Honeywell Bendix/King KFD 840 Primary Flight Display
SELECTED SPEED REFERENCE DIGITAL READOUT
AND BUG
Selected airspeed is displayed in knots or miles per hour (with a
resolution of 1 kt or 1 mph). The proper units are selected during
time of installation and are not pilot selectable.
When the selected airspeed exceeds the displayed range, the bug
parks at the top or bottom of the display with half the bug visible to
indicate the direction to the selected airspeed.
AIRSPEED TAPE AND ROLLING DIGITS
Airspeed Area
4-2
©
Honeywell International Inc. Do not copy without express permission of Honeywell
Press the left knob three times to activate the
airspeed bug AIR SPD. Turn the knob
clockwise to increase the speed bug setting
and counterclockwise to decrease the value.
Pressing and holding the left knob for more
than 2 seconds will cause the airspeed bug to
SYNC to the current airspeed.
The airspeed tape is a moving scale with an
airspeed reference line and airspeed marks
with a range of 30 to 240 kts (35 to 276
mph). A rolling digit display of the current
indicated airspeed is displayed in a window
in the middle of the airspeed tape. The digits
are white on a black background.
The white scale tick marks on the tape are
in 5-kts/mph increments and blank below 30
kts/mph. The scale displays ± 30 kts/mph
from the vertical center (airspeed reference
line) of the tape. The scale slides down for
accelerating
decelerating airspeeds.
airspeeds
and
KFD 840 PG PN 7450-0840-01
Rev C May 28, 2010
up
for
Advertisement
Table of Contents
