What did forced draught mean for the Orlandos?

Was forced draught achieved by increasing airflow through the engines?

It was used to push more power and speed, while the resulting deeper running condition worsened the Orlandos' belt and seakeeping problem.

A viewer asks whether forced draught meant increasing airflow through the machinery. It is described as a way of pushing the propulsion plant for more power and speed. In the Orlando discussion, the operational consequence is the deeper running condition seen under that performance demand. With the ship sitting lower, the already-low armour belt became less useful in rough water, which is why the trial figure should not be read as ordinary sustained service.