Originally Posted by Machinbird
The question now is, how long would it take for such a protection caused pullup to put AF447 on a trajectory for a certain stall?
The first nine messages follow each other without interruption at an average rate of 6,25 sec/msg, which seems to be the maximum rate allowed by the communication protocol. In other words, these messages may have been generated quasi simultaneously.
To put some numbers your question, the high speed protection will apply a nose-up order up to 1.75 g (FCOM). At FL350, M=0.8, ISA+13 the AoA at 1g is about 2,9 degrees and buffet onset loadfactor is about 1.65 at AoA=5,6 degrees (assuming linearised QF72 AoA), which could be attained in about 1 sec. 1.75 g would take the airplane to FL384, M=0.66 (1g buffet onset at that FL) in about 12 sec.
regards,
HN39