How are the ailerons, rudder, and elevator hydraulically powered?

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Prepare for the GoJet Airlines CRJ-550 Test. Use flashcards, multiple choice questions, and detailed explanations to ace your exam!

Multiple Choice

How are the ailerons, rudder, and elevator hydraulically powered?

Explanation:
The movement of the ailerons, rudder, and elevator is done by hydraulic servos called Power Control Units. Each surface is driven by a PCU that receives pressurized hydraulic fluid from the aircraft’s hydraulic systems and converts that pressure into controlled linear motion to deflect the surface. Inside the PCU, a hydraulic servo valve positions a piston based on the pilot’s input (via the control column or flight control computer), and feedback keeps the surface at the commanded angle. So, while hydraulic pumps provide the pressure, the actual actuation happens in the PCU. That’s why the correct description is the Power Control Unit.

The movement of the ailerons, rudder, and elevator is done by hydraulic servos called Power Control Units. Each surface is driven by a PCU that receives pressurized hydraulic fluid from the aircraft’s hydraulic systems and converts that pressure into controlled linear motion to deflect the surface. Inside the PCU, a hydraulic servo valve positions a piston based on the pilot’s input (via the control column or flight control computer), and feedback keeps the surface at the commanded angle. So, while hydraulic pumps provide the pressure, the actual actuation happens in the PCU. That’s why the correct description is the Power Control Unit.

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