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Pitch Scale
Conformal
Magnetic Heading
Index
Roll Scale
Slip/Skid Indicator
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
4-54 November 2002 9701-1153 Rev A
Angle-of-Attack (AOA) Indicator: If enabled, the Angle of Attack
Indicator provides an indication of the aircraft angle of attack in digital and
analog forms. The AOA pointer rotates within the AOA dial to provide an
analog indication of the aircraft AOA.
The stick shaker pointer is a representation of the AOA that will result in a
stick shaker occurrence. The area beyond the stick shaker pointer is a stayout
zone and is graphically symbolized by groups of lines.
The approach reference band is an indication of the normal AOA for
approach, and is variable with changes to flap settings. Refer to Table 4-12
for Flap Positions and their related Maximum and Minimum AOA. The
AOA digital readout is always displayed when the AOA indicator is active.
Table 4-12: CRJ 700 Approach Reference Band Positions
Flap Position Maximum AOA Minimum AOA
0º 6.9º 4.7º
10º 8.1º 5.7º
20º 8.0º 4.4º
30º 5.8º 2.9º
45º 4.3º 1.1º
Angle-of-Attack (AOA) Limit: The AOA Limit symbol shows when the
angle of attack is 80% of the stick shaker angle of attack. It is positioned to
indicate the difference between current angle of attack and the angle of
attack at which stick shaker will occur. If the AOA Limit symbol is two
degrees above the Flight Path symbol, stick shaker will occur if the angle of
attack is increased by two degrees. The AOA Limit symbol is positioned on
the Flight Path symbol (boxed ends set on the Flight Path wings) when stick
shaker occurs.
Pitch Chevrons: There are two Pitch Chevrons located on the Pitch Scale.
They point toward level flight. One is located with the point of its “V” at
+30° (extreme pitch up), the other at -20° (extreme pitch down).
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 4-55
Figure 4-25:
Approach Modes Attitude Symbols
Figure 4-26:
Approach Modes Attitude Symbols
Digital
Readout
Stay-Out
Zone
AOA
Pointer
Stick-Shaker
Pointer
Approach
Reference
Band
AOA
Indicator
AOA
Limit
Pitch
Chevron
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
4-56 November 2002 9701-1153 Rev A
Approach Modes Airspeed Symbol Group
See Figure 4-27. Table 4-13 gives the Approach Modes Airspeed Symbol
Group.
Table 4-13: Approach Modes Airspeed Symbol Group
Symbol
AIII
AII
AI
RO
F/D
VMC
Computed Airspeed ● ● ● ● ● ●
Selected Airspeed/Mach ● ● ● ● ●
Wind Speed and Direction ● ● ● ● ●
Ground Speed ● ● ● ● ● ●
Computed Airspeed: Computed Airspeed is positioned below and to the
left of the Flight Path Symbol. It only shows values between 40 and 400
knots.
Selected Airspeed/Mach: Selected Airspeed or Mach is displayed in the
lower left corner of the display. The Mach Number is displayed as a
decimal point with two digits to the right.
Wind Speed and Direction: The current wind speed and direction, derived
from the IRU, is displayed in the upper right corner of the display. Wind
Speed is displayed directly below the Wind Direction arrow.
The Wind Direction arrow is referenced to the aircraft’s heading and
indicates the direction from which the wind is blowing. For example, a
Wind Direction arrow pointing straight up (the 12 o’clock position)
identifies a direct tail wind. A Wind Direction arrow pointing to the right
(the 3 o’clock position) identifies a direct left crosswind.
The IRU based Wind Speed and Direction are displayed when the aircraft is
in flight and wind speed exceeds 3 knots.
Ground Speed: The IRS Ground Speed is displayed in the lower left corner
of the display. Ground Speed is shown with the letters “GS” following the
number.
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
9701-1153 Rev A November 2002 4-57
Figure 4-27:
Approach Modes Airspeed Symbols
Selected
Airspeed/
Mach
Ground
Speed
Computed
Airspeed Wind Speed
and
Direction
HGS® Pilot Guide for the Bombardier CRJ 700 Model 4200
4-58 November 2002 9701-1153 Rev A
Approach Modes Altitude Symbol Group
See Figure 4-28 and Figure 4-29. Table 4-14 gives the Approach Modes
Altitude Symbol Group.
Table 4-14: Approach Modes Altitude Symbol Group
　
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