Originally Posted by
vilas
Where ever speed is to be reduced in select mode (slat/flap jam) Airbus mentions not below Vls. So other than turbulence where speed can fluctuate about Vls what could be the specific reasons to fly below Vls? Also what is the definition of safely? Getting into alpha prot with manual thrust trips the AP aircraft will be latched to the speed leading to descent or climb as per AoA is that safe?
I was thinking in terms of terrain or windshear escape. You can safely fly below Vls (V a prot for that matter) to maximise the airplane’s performance. At Vls, you still have a healthy margin to Vs1g. Obviously on a normal GA, that would be inappropriate.
I only pointed that out because the OP asked if Vls was some inviolable speed.