What do jet engine hydraulics do?

Question

In flight simulator all jets have this. Doesse anyone know what they do?

Answer 1

hydraulics are the life blood of any aircraft. Engine driven pumps supply Hyd pressure for primary flight controls, secondary flight controls, brakes, steering, landing gear, and some door operations.

Modern large aircraft have from 3-4 separate hyd systems.

Sys #1 is always 1/2 of your primary flight controls only.

Sys #2 is usually 1/2 of your primary flight controls, 1/2 of secondary flight controls, landing gear, brakes and steering.

Sys #3 is usually operated by electric driven pumps, can be operated on the ground for testing systems. Operates the other half of secondary flight controls, emergency brakes, doors and other utility systems.

Sys #4 is and emergency backup system, sometimes operated by a Ram Air Turbine (RAT).

Loss of any one systems, is rarely a major problem. Other systems back it up.

Most important components such as flight controls and brakes are redundantly powered.

Total loss of Hydraulics is 1 in a trillion, United Airlines Flight 232, on 19 Jul 1989 is the only time it has happened to a Major commercial aircraft.

Answer 2

Hydraulics on jet airlines operate many different systems from flight controls, landing gear, flaps, slats, nose wheel steering. The modern jetliner would not be able to fly safely without hydraulics. They are powered by both an engine driven pump and Electric Motor driven pump with at least two separate systems for redundacy if one fails or has a leak..

Answer 3

they control EVERYTHING...everything from the landing gear to the brakes and most importantly the steering...bottom line is that you need them...

Answer 4

All aircraft (with a few exceptions) have hydraulic systems.  The larger and more complex the aircraft - the more hydraulic systems.  These multiple systems are independent of each other but will back up a failed system. i.e. if HYD1 fails for whatever reason HYD2 will take over its workload.

Each system is supplied with pressure from rotary pump driven by an electric motor.

Hope this helps you.

Answer 5

Elevator, ailerons, flaps, rudders, brakes, spoilers, speed brakes, nosewheel steering, tail skid, landing gear.........