A cascade reverser is a reverse thrust system commonly found on high bypass ratio turbofan engines. This system features openings arranged radially near the back edge of the fan cowl. Each opening houses a set of air flow turning vanes, known as cascades. Additionally, there are blocking doors and an actuating system located flush against the inner wall of the fan cowl next to each opening. When activated, the actuating system moves the translating cowl backwards, revealing the cascades. This movement also shifts the blocking doors into the bypass air stream, which blocks its usual path. Instead, the air is diverted through the cascades, redirecting it forward to help slow down the aircraft. An example of this technology can be seen in the Boeing 777 when its cascade reversers are deployed.
