B737-300 V Speeds and FD correlation
My understanding is that when the V speeds for take off are entered into the FMC they have a direct relationship with the flight director commands following an engine failure at V1. However that relationship assumes correct rotation rate.
My question is this: Providing the rotation rate is correct after engine failure at V1, the aircraft should attain V2 and the subsequent FD commands are to maintain V2 speed until level acceleration. But what happens if the pilot is slow to rotate or once airborne fails to continue rotation to the desired attitude and subsequently picks up speed beyond V2 during initial climb.
In that case does the FD demand a higher body angle in order to pull back the speed to V2? I know the FCTM states that the FD will demand a body angle commensurate with the speed attained at the actual time of engine failure. In other words if engine failure occurred at V2 plus 15 then the FD will provide you with the correct body angle to hold V2 plus 15.
But what happens to the FD if due pilot error a slow rotation following engine failure on the ground at V1 occurs. Does it demand a pitch up back to V2 or does it demand a new body angle at some point. And a further question: If V speeds are not entered in the FMC, then does this omission somehow affect the FD demanded body angle in the case of an engine failure at V1?