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┃ aw aw ,, ~e~ A319 ┃ ┃ ┃
┃ Lii,~ A320 ┃ ┃ ┃
┃ ┃ ┣━━━━┳━━━━┫
┃ A~7-~'M" A321 ┃FLIGHT GUIDANCE ┃SEQ 001 ┃REV 26 ┃
┃ FLIGHT CREW OPERATING MANUAL ┃ ┃ ┃ ┃
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If NAV mode is not engaged, the SPD/MACH constraints are not considered.
The SPD profile is :
V2 - SPD LIM - ECON CLB SPD/MACH - ECON CRZ MACH - ECON or preset DES
MACH/SPD - SPD LIM - VAPP.
Note : - When both AP/FDs are OFF, A/THR reverts to selected SPEED mode, except
when the approach phase is activated on MCDU where both managed and
selected SPD are available.
- When expedite mode is engaged, the system disregards SPD LIM and SPD
CSTR no matter what lateral mode is engaged.
- The managed speed/Mach target may be set below maneuvring speed but as
long as the speed target is managed, the FMGS limits the aircraft to the
maneuvering speed of the current slats/flaps configuration (VAPP, F, S, Green
Dot).
- If the managed speed/Mach target is set above VMAX (VFE, VMO, MMO) the
FMGS automatically limits the speed to VMAX.
MINI GROUND SPEED
In approach phase the managed speed target
by the Flight Guidance (FG) part of the FMGS
SELECTED SPEED/MACH TARGET
s the Mini Ground Speed target computed
Refer to 1.22.30 Autothrust for details.
To use a selected speed/Mach target, the pilot uses the knob on the FCU to set the target
speed, which is then displayed in the FCU window. It is also displayed in blue on the PFD
speed scale.
Note: The selected speed/Mach target may be set beyond VLS or VMAX, but when
autothrust is active, the guidance limits the speed to VLS or VMAX.
Selected speed has priority over managed speed. The only automatic change-over from
selected to managed speed target may occur at go-around mode engagement.
In flight, if the situation calls for managed speed, both the PFD and the MCDU display a
message proposing a manual change to managed speed (for example, SET SPD AUTO, SET
HOLD SPD, or SET VFTO or SET GREEN DOT <~ ).
ENGAGEMENT CONDITIONS
The aircraft has a selected speed target under any one of the following conditions
- The pilot pulls out the SPD/MACH selector knob (5 seconds after lift-off)
- Both AP/FDs are OFF (except in APPR phase)
- The FM speed target is lost (except in SRS, G/S, LAND, and GO AROUND modes).
- The MCDU has a preselected speed for the next phase, and the aircraft transitions into
that phase.
- The FMGC is powered up in flight.
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┃ ┃ ┃1.22.30 P 12 ┃
┃ ┃ ┣━━━━━┳━━━━━┫
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本文链接地址：
AIRBUS A320 Flight Crew Operating Manual2(28)
