What is the basic flow path in a typical aircraft hydraulic circuit starting at the reservoir?

What is the basic flow path in a typical aircraft hydraulic circuit starting at the reservoir?

• A. Reservoir → pump → valve → actuator → return line → reservoir.
• B. Reservoir → valve → pump → actuator → reservoir.
• C. Pump → valve → actuator → return line → reservoir.
• D. Reservoir → filter → pump → reservoir.

Answer: (A)

In a typical aircraft hydraulic system, fluid flows in a closed loop starting at the reservoir. The pump draws fluid from the reservoir and pressurizes it. The pressurized fluid then passes through a valve that directs and regulates where it goes, sending it to the actuator to perform work. After the actuator uses the fluid, it returns through a return line back to the reservoir, where it can be cooled and filtered before re-entering the cycle. This sequence—reservoir to pump to valve to actuator to return line to reservoir—keeps the system pressurized, controllable, and continuous. Placing the valve before the pump would mean trying to control unpressurized fluid, which isn’t effective; skipping the return path breaks the loop and prevents circulation.

In a typical aircraft hydraulic system, fluid flows in a closed loop starting at the reservoir. The pump draws fluid from the reservoir and pressurizes it. The pressurized fluid then passes through a valve that directs and regulates where it goes, sending it to the actuator to perform work. After the actuator uses the fluid, it returns through a return line back to the reservoir, where it can be cooled and filtered before re-entering the cycle. This sequence—reservoir to pump to valve to actuator to return line to reservoir—keeps the system pressurized, controllable, and continuous. Placing the valve before the pump would mean trying to control unpressurized fluid, which isn’t effective; skipping the return path breaks the loop and prevents circulation.