Speeds

Question 1

Green dot speed is displayed in flight, when the FLAPS lever is at 0.
The FMS also computes the green dot speed. It is displayed on the T.O, APPR, and GA panels of the FMS PERF

Green dot is:

Answer 1

The final takeoff speed
The managed speed target speed, in CONF 0, when the approach phase of the FMS is active
The drift down speed, in the case of an engine failure.
It will also give the best climb gradient

Question 2

VLS is

Answer 2

The slowest selectable speed

Question 3

F is:

At takeoff or go-around: The minimum recommended speed at which the flaps can be retracted from CONF 2, CONF 3 to CONF 1+F . It is the

During approach: The managed speed target, when in CONF 2 or CONF 3.

F is displayed in flight, when the FLAPS lever is at 2 or 3.

If the takeoff is performed in CONF 2 or CONF 3, F appears three seconds after liftoff.

Note:
The FMS also computes F. It is displayed on the T.O, APPR, and GA panels of the FMS PERF page

Answer 3

minimum flap retract speed.

Question 4

S speed is the …..

At takeoff or go-around: The minimum recommended speed at which the slats and flaps can be retracted from CONF 1+F or CONF 1 to CONF 0
During approach: The managed speed target, when in CONF 1 or CONF 1+F.

S is displayed in flight, when the FLAPS lever is at 1.

If the takeoff is performed in CONF 1+F, S appears three seconds after liftoff.

Note:
The FMS also computes S. It is displayed on the T.O, APPR, and GA panels of the FMS PERF page

Answer 4

Minimum flap retract speed

Question 5

VFE is the…..

There is one VFE per configuration.

The VFE for each slats/flaps configuration is also displayed on the speeds placard in the cockpit.
The display of the VFE is based on:
The actual position of the slats and flaps during retraction
The position of the FLAPS lever during extension

When the slats or flaps are jammed, the display of the VFE is based on the actual position of the slats and flaps. The VFE that corresponds to the abnormal configuration is also displayed on the ECAM

Note:
The overspeed warning is independent of the display of the VFE.
When all PRIMs are failed, the VFE is not displayed, but the overspeed warning remains available.

Answer 5

maximum speed with the slats or flaps extended.

Question 6

VAPP is…..

DISPLAY
VAPP is not displayed on the PFD.
The VAPP is displayed on the APPR panel of the FMS PERF page. (Refer to DSC-22-FMS-20-20-20 PERF Page)

The flight crew can update the VAPP on the APPR panel of the FMS PERF page.
The PRIMs use VAPP for the determination of the managed speed target during the approach

Answer 6

the final approach speed.

It can be VLS+5-VLS +15 depending on 1/3 of the reported tower headwind that you have entered.