How is the thrust reverser operated?

How is the thrust reverser operated?

• A. Hydraulically
• B. Electrically
• C. Pneumatically
• D. Manually

Answer: (A)

Thrust reversers are hydraulically operated because they require strong, precise, and rapid actuation to move heavy components like blocker doors and translating sleeves or cascade vanes. Hydraulic systems deliver high force in compact actuators, provide smooth control, and offer reliable fail-safe behavior with pumps and accumulators that are already part of aircraft systems. Electric actuation would need bulky power electronics and wiring to deliver the same force, adding weight and potential reliability issues. Pneumatic actuation generally cannot match the force density and precise control needed for reversing engine thrust, and manual operation is unsafe and impractical. So, hydraulic actuation is the standard method.

Thrust reversers are hydraulically operated because they require strong, precise, and rapid actuation to move heavy components like blocker doors and translating sleeves or cascade vanes. Hydraulic systems deliver high force in compact actuators, provide smooth control, and offer reliable fail-safe behavior with pumps and accumulators that are already part of aircraft systems. Electric actuation would need bulky power electronics and wiring to deliver the same force, adding weight and potential reliability issues. Pneumatic actuation generally cannot match the force density and precise control needed for reversing engine thrust, and manual operation is unsafe and impractical. So, hydraulic actuation is the standard method.