Originally Posted by
Jwscud
I can’t find my old 737 FCOM but my understanding of the system was that trim was inhibited the moment you applied the control column in the opposite direction, and that included speed trim.
No, it will happily continue to trim even if you push (you need to) forward on the controls after take off when you accelerate. It will stop when you apply opposite trim. Which I do on every take off since STS trims the aircraft out of trim. It normally takes 2-3 turns of trim, depending on when you start to trim.
Weird system!