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AIRSPEED REFERENCE
          AND SCALE
 TARGET AIRSPEED
ECON SPEED RANGE
     RACH NURBER
(~ Actual Airspeed Reference Line and Scale
A white scale on a grey background moves
to a yellow triangle to show airspeed. The
(~ Speed Trend (yellow)
in front of a fixed yellow reference line next
minimum airspeed indication is 30 knots.
This pointer starts at the speed symbol. The tip shows the speed the aircraft will reach
in 10 seconds if its acceleration remains constant. The pointer appears only when it is
greater than 2 knots and disappears when it is less than 1 knot.
It also disappears if the FACs fail.
CCM ALL
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┃                                ┃                                ┃1.31.40     P 6       ┃
┃                                ┃                                ┣━━━━━┳━━━━━┫
┃I  -~ A318                      ┃I INDICATININDICATIONS ONSPFDS  ┃SEQ 001 1 ┃I REV 24  ┃
┃  .-,,.8, ,, ~L,~ A319          ┃                                ┃          ┃          ┃
┃ Lli,~ A320                     ┃                                ┃          ┃          ┃
┃      A~7-~'M" A321             ┃                                ┃          ┃          ┃
┃   FLIGHT CREW OPERATING MANUAL ┃                                ┃          ┃          ┃
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(~) Target Airspeed (magenta or blue)
This symbol gives the target airspeed or the airspeed corresponding to the target Mach
number.
The target airspeed is the airspeed computed by FMGC in managed speed mode
(magenta) or entered manually on the FCU for selected speed mode (blue). The target
speed is a magenta double bar (=) when associated with the ECON speed range.
Otherwise it is a triangle (magenta or blue).
When the target speed is off the speed scale, its value is displayed as numbers below
or above the speed scale.
     Mach Number (green)
This is displayed when it is greater than 0.5
     Speed Protection (green)
This symbol indicates the speed (VMO + 6 kt or MMO + 0.01) at which overspeed
protection becomes active. (Refer to 1.27.30)
R ~ ECON Speed Range (magenta)
In descent mode with ECON/AUTO SPD mode active, these two half triangles replace the
selected speed symbol. It shows the upper and lower limits calculated by the FMGC.
- The upper speed is target speed + 20 knots, limited to VMAX or VMO - 3 knots or
   MMO - 0.006, whichever is lowest.
   If a speed limit or a speed constraint applies, the upper margin is limited to ECON SPD
　
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本文鏈接地址：AIRBUS A320 Flight Crew Operating Manual4(47)