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roll exceeds 65 degrees. During excessive attitude, only pitch, roll, airspeed and altitude are
displayed. Red chevrons point toward zero in extreme pitch attitudes. A portion of blue or brown
coloring, representing sky or ground, remains displayed, regardless of pitch attitude, to assist
with orientation.
FLIGHT INSTRUMENTS
Description
Vol. 2 11−10−17
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
CONTROLS AND INDICATORS (CONT'D)
PFD Attitude Displays
Figure 11−10−11
Airspeed Displays
IAS Scale
The indicated airspeed scale is a vertical “moving tape” display. The IAS scale contains a line
marking every 5 and 10 knots, and a numeric label every 20 knots. If airspeed data becomes
invalid, the scale is replaced with a red IAS annunciation.
FLIGHT INSTRUMENTS
Description
Vol. 2 11−10−18
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
CONTROLS AND INDICATORS (CONT'D)
IAS Pointer
This stationary triangle is displayed at the center of the IAS window. The current indicated
airspeed is the IAS scale indication at the pointer.
IAS Trend Vector
The IAS Trend Vector is a magenta line that extends from the IAS pointer to predicted future
airspeed. The head of the trend vector aligns with the IAS scale to predict what the airspeed
will be in 10 seconds (if present acceleration is maintained). The vector extends up as airspeed
increases, and down as airspeed decreases. The trend vector is not displayed when the
airplane is on the ground.
Mach Display
The current indicated Mach speed automatically displays below the airspeed scale with an M
label as Mach increases above 0.450. This display is removed when Mach decreases below
0.400. Mach display changes in 0.002 increments.
Overspeed Cue
The overspeed reference is shown de-emphasized (red triple-width vertical bar) on the
airspeed scale ascending from VMO/MMO to the top of the airspeed tape. The de-emphasized
overspeed reference changes to an emphasized overspeed reference (red and grey
checkerboard symbol) when the airspeed is two knots or greater into the VMO/MMO region. The
de-emphasized overspeed reference also changes to an emphasized overspeed reference
when the airspeed trend has been two knots or greater into the VMO/MMO region for five
seconds or more.
Low Speed Cue
The low speed cue indicates the aircraft’s impending stall speed, and is generated by
angle-of-attack information from the auxiliary angle-of-attack vane. The low speed cue
indication is shown de-emphasized (red triple-width vertical bar) on the airspeed scale,
descending from impending stall speed to the bottom of the airspeed tape. The de-emphasized
cue changes to an emphasized cue (red and gray checkerboard symbol) when airspeed is two
knots or greater into the impending stall speed region. The de-emphasized cue also changes
to an emphasized cue when the airspeed trend has been two knots or greater into the
impending stall speed region for five seconds or more.
FLIGHT INSTRUMENTS
Description
Vol. 2 11−10−19
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
CONTROLS AND INDICATORS (CONT'D)
PFD Airspeed Display and Underspeed/Overspeed Cues
Figure 11−10−12
Speed Reference (Bug) Field
This line display shows a selected speed reference (bug) value that can be controlled using
either air data reference panel (ADRP). The SPEED REFS knob and SEL button are used to
sequentially select one of four available bugs, 1, R, 2, or T, corresponding to (V1, VR, V2, or VT)
for display in this field.
The SET knob on the ADRP is used to change this value. The PUSH OFF switch on the ADRP
enables/disables display of the selected bug. The bug position on the IAS scale automatically
updates as the numeric values change. After five seconds of inactivity, the speed reference
field display blanks.
FLIGHT INSTRUMENTS
Description
Vol. 2 11−10−20
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
CONTROLS AND INDICATORS (CONT'D)
Speed Reference (Bug) Table
The table displays on the lower portion of the IAS scale when airspeed is less than 40 knots.
When the table displays, use the ADRP to select and change one of four airspeed bugs (V1,
VR, V2 or VT).
NOTE
For Precision-Plus-equipped aircraft, V-speeds can be computed
and entered via the FMS.
V1 Bug
The reference marker is a cyan line followed by a 1. The V1 bug is the takeoff decision speed
reference. The V1 bug is automatically removed at lift-off.
　
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