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localizer and glide slope. When the aircraft is
aligned with the ILS, you just have to keep the
bird aligned with the heading vertical blue
line (lateral guidance) and keep the bird at 3°
on the pitch ladder (vertical guidance).
Remember that the “bird” (flight path vector)
shows you where the aircraft is actually going.
This visual assistance helps you in following
the ILS indication very easily. Try it, and you
will appreciate it, even with strong cross
winds.
Speed Indicator
The current airspeed The current airspeed The current airspeed
is 276 knots is 296 knots is 298 knots
(Mach 0.56) and (Mach 0.59) and (Mach 0.6) and
the target speed is the target speed is the target speed is
290 knots (managed). 250 knots (selected) 310 knots (selected).
Standard Information
1. Scrolling speed tape. The minimum
airspeed registered here is 40 knots.
2. Target speed entered on the FCU (if
selected) or managed by the FMGC. The
triangle index showing the target speed is
magenta if the speed is managed and blue
if the speed is selected.
If the target speed value is not visible on
the speed tape, it is displayed above the
speed tape if higher than the highest
displayed speed, and below if it is lower
than the lowest displayed speed. Again, it
is displayed in magenta if managed and in
blue if selected.
3. Mach speed. It is shown only when mach
speed is greater or equal to 0.50.
4. Speed trend: shows the airspeed the
aircraft will achieve in 10 seconds.
Additional Information
The speed tape also shows additional
information:
• VFE NEXT (1)
This is the VFE (maximum speed
with flaps extended) that
corresponds to the next flap/slat
position. You should make sure the
actual airspeed is below VFE NEXT
before extending more flaps.
It is shown with an amber = sign.
• Green dot speed (2)
It is shown with a green circle on the
speed tape. It is the best lift over drag
speed. In clean configuration, it is the
maneuvering speed.
It is used as the target speed during single
engine climb and during expedite climb.
• At low speeds, the minimum safe speeds
are displayed
VLS (1)
It is shown with an amber line next to the
speed tape. It is the lowest selectable
speed. If the pilot selects a
speed below VLS, the autothrust
system limits the speed to VLS.
Alpha Protection (2)
EFIS
Airbus Series Vol.1
(c) 2007 Wilco Publishing www.wilcopub.com - www.FeelThere.com 37
The alpha protection system will
trigger when the airspeed
reaches this value. It is
displayed as black and amber
rectangles next to the speed
tape.
Alpha max (3)
This speed corresponds to the maximum
angle of attack.
It is shown as a red ribbon.
• At high speeds, the maximum speeds are
displayed
VMAX (1)
This is the maximum speed the aircraft
can take, depending on its configuration. It
is shown by a red scale on the speed tape :
• VMO/MMO in clean configuration
• VLE if landing gear is extended
• VFE is flaps/slats are extended
(varies with the flap
configuration)
Max speed = VMO + 6 knots (2)
Speed at which the fly-by-wire
system will take corrective
actions to reduce speed.
• During take off
V1 (1), speed at which takeoff
can not be aborted shown with
a ‘1’ and a blue line
VR (2), rotation speed shown as
a blue circle
V2 (3), speed at which the
aircraft can climb safely shown
as a magenta triangle (target
speed)
• In flight
Maneuvering speed
This is the normal procedure speed that
depends on the aircraft configuration:
• Green Dot speed in clean configuration
• S speed (1) if slats are deployed (flap
handle in position 1)
• F speed if the flaps are
deployed (flaps in position 2,
3 or FULL)
The maneuvering speed is
not a minimal speed (you can
fly the aircraft below this
speed), but it is the
“standard” speed that should
be used for procedures such
as holding
patterns or final approach.
If the speed is managed during
approach, the maneuvering speed will
be used as the target speed.
Note : If you fly the aircraft below the
maneuvering speed, the autopilot
bank angle will be automatically
limited to 15°, instead of 25° in normal
conditions.
When the autopilot and autothrust are active,
the actual target speed will never be higher
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Airbus_Pilots Guide_UK空客飞行员指南(22)
