King Air Engine Anti-Ice Demonstration 

This demo shows the Inertial Separator Engine Anti-Ice System of the PT6 engine. As comments show, I stand corrected in the reason why it’s called a reverse flow engine. It is a reverse flow engine due to the fact that the airflow reverses between intake and combustion. It changes direction entirely (reverse) as opposed to a normal turbine engine where the airflow is always in the same direction.