737NG flaps speed VNAV departure

[Levelmind]

Hi,

It has come to my attention that if VNAV is used for takeoff, the autothrottle will command a speed of 230kts, at accel height, if flaps are 5.

My question is, why is that? What is this speed based on, since the max speed for flaps 5 should be 250kts?

Also, what speed will the autothrottle (VNAV) command for the other flap settings (e.g. flaps 1/2/10/15/25), and what are these speed based on?


Thanks in advance!