B777 Flap Retraction Speed
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B777 Flap Retraction Speed
My question is about takeoff flap retraction speed schedule when using flap 15/20 for takeoff on the B777
The FCOM states that the initial retraction from flap 15/20 to flap 5 is initiated at "Display" of "Vref 30 + 20"
Vref 30 + 20 is obviously not displayed on the speed tape - what is displayed?
The FCOM states that the initial retraction from flap 15/20 to flap 5 is initiated at "Display" of "Vref 30 + 20"
Vref 30 + 20 is obviously not displayed on the speed tape - what is displayed?
Flap Maneuver Speed
FLAP POSITION: MANEUVER SPEED
FLAPS 0: VREF30 + 80
FLAPS 1: VREF30 + 60
FLAPS 5: VREF30 + 40
FLAPS 15: VREF30 + 20
FLAPS 20: VREF30 + 20
FLAPS 25: VREF25
FLAPS 30: VREF30
So retraction can begin as you accelerate past the F15/F20 bug on the speedtape == manoeuvre speed for that flap setting...
FLAP POSITION: MANEUVER SPEED
FLAPS 0: VREF30 + 80
FLAPS 1: VREF30 + 60
FLAPS 5: VREF30 + 40
FLAPS 15: VREF30 + 20
FLAPS 20: VREF30 + 20
FLAPS 25: VREF25
FLAPS 30: VREF30
So retraction can begin as you accelerate past the F15/F20 bug on the speedtape == manoeuvre speed for that flap setting...
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Thank you for the answers!
Re-entry, you are correct when it comes to flap retraction from flap 5 to flap 1 and flap 1 to up - you retract when you reach the "5" and "1" on the speed tape respectively.
Why does the FCOM state that flap retraction from flap15/20 to flap 5 is at Vref 30 + 20, and not when you reach "20" on the speed tape?
Can it be that when the a/c is very light that the "20" or "15" is not displayed on the speed tape, as it is below V2 + 15?
Re-entry, you are correct when it comes to flap retraction from flap 5 to flap 1 and flap 1 to up - you retract when you reach the "5" and "1" on the speed tape respectively.
Why does the FCOM state that flap retraction from flap15/20 to flap 5 is at Vref 30 + 20, and not when you reach "20" on the speed tape?
Can it be that when the a/c is very light that the "20" or "15" is not displayed on the speed tape, as it is below V2 + 15?