Originally Posted by
punkalouver
The FD has nothing to do with initiating the rotation. That is based on the non-flying pilot saying 'rotate' which is soon after the automated V1 call(unless a contaminated runway) which is based on reading the airspeed indicator. I suppose someone could rotate very slowly but something hasn't been fully explained at this early stage yet.
You rotate into the FD. If the FD is in ALT.. and you follow the FD and don’t rotate to around 15 degrees, but follow the FD in ALT, I would suggest perhaps very little rotation will occur.