Originally Posted by
tubby linton
Sample performance-
Conf 1+f IAE powered A321 TOW 80T
Toga V1 134 Vr146 V2 154 MRG 1152 Lim TOW Vmu
Flex 52 V 154 Vr 154 V2 156 MRG 1 Lim TOW-OBS
Nice example.
In this airport with those conditions you became obstacle limited in this flex 52.
To clear those obstacles the speeds were increased to facilitate obstacle clearance probably for the second segment of the takeoff flight path.
Improved climb.
But you have to know the limited codes.