To what pressure is the hydraulic reservoir pressurized?

The hydraulic reservoir is pressurized to 15 PSI in many aircraft systems. This level of pressure is crucial because it helps ensure that hydraulic fluid remains adequately distributed throughout the system, allowing for efficient operation of systems such as landing gear, brakes, and flight control surfaces. Maintaining this pressure is essential for preventing cavitation in the hydraulic components, which can lead to system failures or inefficiencies.

Pressurizing the reservoir aids in maintaining proper fluid flow and ensures that the hydraulic system operates within its designed parameters. The specific choice of 15 PSI allows for optimal performance across various operating conditions, balancing the need for pressure with the potential risks associated with excess pressure. This is critical for the system’s reliability and overall safety when operating the aircraft.