A cascade reverser is a reverse thrust system most typically installed on high bypass ratio turbofan engines. A cascade reverser incorporates radially arranged openings near the aft edge of the fan cowl of a turbofan engine. Within each of the openings is mounted a cascade set of air flow turning vanes.

How does thrust reversers work?

How Does a Thrust Reverser Work? A thrust reverser is contained within the nacelle system, an aerodynamic structure surrounding the jet engine. ... To slow down after landing, the aircraft engine itself does not run in reverse; rather, the direction of the engine's fan airflow is reversed, creating a massive drag.

How effective are thrust reversers?

By the OP's proposed measurement (reverse thrust / forward thrust), the efficiency is also strongly dependent on the engine speed. At maximum thrust the reverser may be 50% or 60% efficient, but at lower power levels it may be less than 10%.