Originally Posted by
Bagot_Community_Locator
I am bit confused about how to determine Vapp, in particular in these conditons :
- no ice accretion
- no auto-thrust
- no autoland
- nil wind
- normal conditions (ie. no failures)
If you follow FCOM or QRH, with no wind and no auto-thrust, Vapp will be Vls.
You can fly at Vls, but I don't suspect that a lot of people will do it, since you don't have a margin below your speed and your landing will not be so smooth. (However, actual landing distances are calculated with Vapp=Vls)
Where I work, we always fly the Vapp calculated by the FMGS when flying without auto-thrust. So always with the 5kts increment.
No need to calculate the Vapp if your FMGS does it for you. (No failure case)