Which system uses hydraulically operated actuators to control nozzle movement?

Which system uses hydraulically operated actuators to control nozzle movement?

• A. Anti-Icing System.
• B. Variable Exhaust Nozzle (VEN).
• C. Fan Variable Geometry (FVG).
• D. Compressor Variable Geometry (CVG).

Answer: (B)

Variable Exhaust Nozzle uses hydraulically operated actuators to move the nozzle petals, changing the exit area to optimize engine performance and thrust across different flight conditions. The hydraulic power is what provides the force to reposition the nozzle precisely as commanded by the engine control system, enabling the nozzle to go from more closed to more open positions as needed. Anti-icing systems deal with preventing ice buildup and do not control nozzle geometry. Fan Variable Geometry adjusts the inlet/fan geometry to improve airflow, while Compressor Variable Geometry alters compressor stator vanes for efficiency and surge margin; neither involves moving the exhaust nozzle itself.

Variable Exhaust Nozzle uses hydraulically operated actuators to move the nozzle petals, changing the exit area to optimize engine performance and thrust across different flight conditions. The hydraulic power is what provides the force to reposition the nozzle precisely as commanded by the engine control system, enabling the nozzle to go from more closed to more open positions as needed. Anti-icing systems deal with preventing ice buildup and do not control nozzle geometry. Fan Variable Geometry adjusts the inlet/fan geometry to improve airflow, while Compressor Variable Geometry alters compressor stator vanes for efficiency and surge margin; neither involves moving the exhaust nozzle itself.