"Transition is the change of state from hover to movement in a horizontal direction, or a change from horizontal flight back to the hover. As a helicopters forward airspeed increases a horizontal airflow is created across the disc. This horizontal airflow reduces the amount of induced flow through the disc. The resulting increased angle of attack and reduced rotor drag means the disc becomes more efficient and less power is required. [FONT='Verdana','sans-serif']This effect is known as translational lift.[/FONT]"
Right out of my ATPL notes.
Less induced flow = greater AoA for same pitch setting
Has to be answer C!
To get from the hover to forward motion you have to push forward on the cyclic, this itself does not increase the AoA but the reduced IF. Read the answer again.
Totally ignore the movement of the disc when thinking about these questions just concentrate on the vector diagram, it makes more sense that way.
TalkSpike.