In thrust reversing, cascade vanes are used to accomplish which?

In thrust reversing, cascade vanes are used to accomplish which?

• A. Turn to a forward direction the fan and/or hot exhaust gases that have been blocked from exiting through the exhaust nozzle
• B. Form a solid blocking door in the jet exhaust path
• C. Increase exhaust velocity
• D. Redirect air flow to cabin

Answer: (A)

Cascade vanes are a set of curved blades placed in the path of the engine’s exhaust within a thrust reverser. When reverse thrust is deployed, the exhaust flow is directed into these vanes, which deflect and turn it forward rather than allowing it to exit straight back. That forward-directed jet creates a reaction force on the aircraft in the opposite direction, producing reverse thrust to help slow the airplane on landing. This is a directional change in the exhaust flow, not a simple blocking of the nozzle, not an increase in exhaust velocity, and it’s not intended to send air toward the cabin.

Cascade vanes are a set of curved blades placed in the path of the engine’s exhaust within a thrust reverser. When reverse thrust is deployed, the exhaust flow is directed into these vanes, which deflect and turn it forward rather than allowing it to exit straight back. That forward-directed jet creates a reaction force on the aircraft in the opposite direction, producing reverse thrust to help slow the airplane on landing. This is a directional change in the exhaust flow, not a simple blocking of the nozzle, not an increase in exhaust velocity, and it’s not intended to send air toward the cabin.