Which system is used to control the ERJ-145's hydraulic functions?

The hydraulic system is specifically designed to control various hydraulic functions in the ERJ-145, which include operating flight control surfaces, landing gear, and brakes. The hydraulic system utilizes hydraulic fluid under pressure to transmit force, which allows for efficient and effective control of these essential components.

This system is crucial because hydraulic mechanisms provide the necessary power-to-weight ratio that electric or pneumatic systems may not achieve. The design of the hydraulic system ensures reliable operation even under high-load conditions, which is vital for the safety and performance of the aircraft.

While the electrical system powers various electronic components and the pneumatic system manages air pressure for different applications, these systems are not responsible for direct hydraulic control. The manual system, while it may refer to pilot actions, does not directly manage hydraulic functions, reinforcing that the hydraulic system is the key component in controlling the hydraulic functions of the ERJ-145.