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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 deemphasized
overspeed reference changes to an emphasized overspeed reference (red
and gray 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 deemphasized
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 deemphasized
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
For Training Purposes Only
May 03
11-23
P I LOT T R A I N I N G GU I D E
PFD Airspeed Display and Underspeed / Overspeed Cues
Figure 11-12
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.
P604_11_034
260
280
300
320
240
M.476
EMPHASIZED
OVERSPEED CUE
180
160
140
120
200
M.466
EMPHASIZED
LOW SPEED CUE
260
280
300
320
240
M.466
DE-EMPHASIZED
OVERSPEED CUE
200
180
160
140
200
M.466
DE-EMPHASIZED
LOW SPEED CUE
1.0
2
R
T
140
120
100
80
1
M.452
20
10
10
20
300
200
100
100
000
8000
TERM
VOR1
TRU
NO FLIGHT PLAN
TCAS
OFF
29.85 IN
2400M
GS
RA
TO
LOC 1
DR TO
ALTS
FMS1
12
DTK 333
.7
YUL
NM
4
4
2
2
1
1
10
2500M 200
N
33
15
12
E
6
3
0
3000
0FT
2
1
TAKEOFF ROLL DISPLAY
1.0
2
T
180
160
140
120
20
10
10
30 300
200
100
100
000
8000
TERM
VOR1
TRU
NO FLIGHT PLAN
TCAS
OFF
29.85 IN
2400M
GS
RA
TO
LOC 1
DR TO
ALTS
FMS1
12
DTK 333
.6
YUL
NM
4
4
2
2
1
1
10
1.2
2500M 200
N
33
15
12
E
6
3
0
3000
VOR2
0FT
2
1
ROTATION DISPLAY
IAS Scale
IAS Pointer
Mach Display
IAS Trend Vector
FLIGHT INSTRUMENTS
11-24 For Training Purposes Only
May 03
P I LOT T R A I N I N G GU I D E
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.
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).
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.
VR Bug
The reference marker is a cyan line followed by an R. The VR bug is the rotation speed
reference. The bug display is automatically removed after the V2 speed is exceeded.
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庞巴迪挑战者604机组操作手册 CL_604-FLIGHT_INSTRUMENTS(12)
