Auto Flap Retract System A320

Practical use of Auto Flap Retract System to meet SID Waypoint Speed Constraint

[@mrn7430]

Thanks

[@youngypaul]

Good video, thanks for sharing.

[@320intheseat]

Thank you!

[@maalintv8042]

How do I make it stop because when Im ready for take off it doesn’t allow me to add flaps it automatically cancels my flaps from going down

[@abingdonboy]

So why wouldn’t you just retract the flaps once you’re above S speed which is 207 here? You could’ve been clean at the speed constraint

[@320intheseat]

Because GreenDot is 239 and waypoint speed constraint is AT 220 kts.

[@abingdonboy]

@@320intheseatyes but S speed and accelerating is when you can call for flaps 0, what does green dot have to do with cleaning up? You could be at 220 clean right? Genuine question as I’d like to know for my own configuration planning

[@320intheseat]

@@abingdonboy maintaining 220 clean would mean maintaining speed below green dot in clean configuration which is not recommended. GreenDot is ‘minimum clean speed’ (L/D max)

[@abingdonboy]

@@320intheseat thanks very much, that makes sense, just started like training so this was one of the things I was trying to figure out

[@320intheseat]

green dot is L/D max. Flying below GD clean would put us at the ‘back side of the power curve’ (having to increase thrust to maintain a lower speed) also would put us close to VLS (which would increase during a turn possible putting us inside VLS)

[@mrn7430]

Thanks