Originally Posted by
Skyjob
On similar narrow body you can save up to 50-70kg if you land using idle reverse thrust which can sometimes only be achieved by wasting those 15kgs saved through use of lower flaps. (Slow it down +15kgs, ability for landing with idle reverse -70kgs, saving 55kgs!)
On the A320 family using flaps 3 or flaps full is only about +-3/6kts on the VAPP. Does not make a big difference for the landing roll. Using autobrake low with flaps 3 and reverse idle works very nicely unless you operate on short runways I guess.
The green procedure recommends Flaps 3. I’m pretty convinced they take the potential extra fuel burn of using more reverse thrust into considerations.