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(1) Decision Speed (V1)
This is a blue symbol (numeral one) that the crew manually inserts via the MCDU. When it is off
the scale, the upper part of the scale shows it in numbers.
It disappears after liftoff. (Refer to PRO-SUP-10 Other Speeds).
(2) Minimum Flap Retraction Speed
This is a green symbol (letter F).
It appears when the flap selector is in position 3 or 2. (Refer to PRO-SUP-10 Characteristic
Speeds).
(3) Minimum Slat Retraction Speed
This is a green symbol (letter S).
It appears when the flap selector is in position 1. (Refer to PRO-SUP-10 Characteristic
Speeds).
(4) VFE NEXT
The VFE next symbol is an amber equal sign showing the VFE corresponding to the next flap
lever position.
It appears when the aircraft altitude is below 15 000 ft or 20 000 ft, depending upon the FAC
standard. (Refer to PRO-SUP-10 Protection Speeds).
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INDICATING / RECORDING SYSTEMS
INDICATIONS ON PFD
A318/A319/A320/A321 FLEET DSC-31-40 P 16/68
FCOM 19 AUG 10
(5) Green Dot (Engine-out operating speed in clean configuration)
This green dot appears, when the aircraft is flying in the clean configuration.
It shows the speed corresponding to the best lift-to-drag ratio.
AIRSPEED
Applicable to:
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INDICATING / RECORDING SYSTEMS
INDICATIONS ON PFD
A318/A319/A320/A321 FLEET DSC-31-40 P 17/68
FCOM 19 AUG 10
AIRSPEED
Applicable to:
,
,
MSN,,,,
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INDICATING / RECORDING SYSTEMS
INDICATIONS ON PFD
A318/A319/A320/A321 FLEET DSC-31-40 P 18/68
FCOM 19 AUG 10
(1) Actual Airspeed Reference Line and Scale
A white scale, on a grey background, moves in front of a fixed yellow reference line (next to a
yellow triangle) to indicate airspeed. The minimum airspeed indication is 30 kt.
(2) Speed Trend (yellow)
This pointer starts at the speed symbol. The tip indicates the speed the aircraft will reach in
10 s, if its acceleration remains constant. if its acceleration remains constant. The pointer only
appears, when it is greater than2 kt, and disappears when it is less than 1 kt.
It also disappears, if the FACs fail.
(3) 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 the airspeed manually entered on the FCU for selected speed mode (blue). The target speed
is indicated by a magenta or blue triangle.
When the target speed is off the speed scale, its value is displayed as numbers, either above
or below the speed scale.
(4) Mach Number (green)
It is displayed, when it is greater than0.5.
(5) Speed Protection (green)
This symbol indicates the speed (VMO +6 kt or MMO +0.01) at which overspeed protection
becomes active (Refer to DSC-27-20-20 GENERAL).
(6) ECON Speed Range (magenta)
In descent mode with the ECON/AUTO SPD mode active, these two thick lines replace the
selected speed symbol. It shows the upper and lower limits, calculated by the FMGC.
The upper speed is target ‐ speed +20 kt, limited to VMAX or VMO -3 kt or MMO -0.006,
whichever is lowest.
‐ If a speed limit or a speed constraint applies, the upper margin is limited to ECON SPD
+5 kt.
‐ The lower speed margin is the target speed -20 kt, limited to green dot, F, S, or VLS,
whichever is higher.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INDICATING / RECORDING SYSTEMS
INDICATIONS ON PFD
A318/A319/A320/A321 FLEET DSC-31-40 P 19/68
FCOM 19 AUG 10
(1) Minimum Selectable Speed (VLS)
The top of the amber strip along the speed scale indicates this speed. It represents the lowest
selectable speed providing an appropriate margin to the stall speed. (Refer to PRO-SUP-10
Characteristic Speeds)
VLS information is inhibited from touchdown until 10 s after liftoff.
(2) Alpha Protection Speed
The top of a black and amber strip along the speed scale indicates this speed.
It represents the speed corresponding to the angle of attack at which alpha protection
becomes active (Refer to DSC-27-20-10-20-A PROTECTIONS - HIGH ANGLE OF ATTACK
PROTECTION).
It is displayed when in pitch normal law.
(3) Alpha Max Speed
The top of a red strip along the speed scale indicates this speed. It represents the speed
corresponding to the maximum angle of attack that the aircraft can attain in pitch normal law
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A320机组操作手册FLIGHT CREW OPERATING MANUAL 3(106)
