This is a mod for FS4 and FSG, including versions of the B777-300ER and the B777-200LRF. It features three hydraulic systems, as well as a RAT and mechanical backups. Hydraulic failures such as actuator, brake, and thrust reverser are simulated. The hydraulic function description of this module is as follows:
When the aircraft is cold & dark on the ground and hydraulic is failure , the ailerons and elevators will naturally droop.
Both engines can pressurize the left and right hydraulic systems, but the two buttons on the hydraulic panel and the two selectors below them must be turned on. Only then, when the engines are available, can these pumps be pressurized to bring the hydraulic fluid to a certain pressure, allowing the aircraft’s control surfaces to move or deflect. The center hydraulic pump buttons and switches must also be set to ON or AUTO. For the 777F, with stable electrical power supplied to the two electric pumps of the center hydraulic system, the main cargo door can be opened. The operation of flaps and slats now also relies on hydraulics!
What if the engines fail? No worries — we still have control surfaces available. When each hydraulic system fails, the spoilers behave differently, and the main control surfaces have backup pressure supplied by multiple hydraulic systems. If only the center hydraulic system is available, then only four spoilers can be used. The elevators and ailerons work normally, and the rudder is also normal. After a dual engine failure, we still have the RAT, but airspeed must be above 145 knots. If the ram air turbine is deployed at too low an airspeed, the actuators cannot work. If your attitude and altitude become dangerous, you may crash 😱. If the altitude is relatively low, it is possible to damage the landing gear on impact, which could then cause some hydraulic systems to become unavailable.
What if the RAT also fails? No worries — we still have mechanical backups. The mechanical backups include two spoilers, the rudder (when airborne with no power source — including no RAT and no engine running — the rudder remains controllable; however, on the ground, it will be fixed at 26° left deflection), and the horizontal stabilizer (for trim).
Mechanical backup control surface demonstration:
Left Hydraulic System unavailable:
Right Hydraulic System unavailable:
Only Center Hydraulic System available:
I have also implemented a hydraulic-controlled brake system. When the aircraft's right hydraulic system is available, both manual braking and auto braking work normally. However, if the right hydraulic system becomes unavailable for some reason, the center hydraulic system temporarily takes over. In this case, auto braking is inoperative, leaving only manual braking and parking brake, which extends the stopping distance after landing. (The way to trigger this is by shutting down engine 2 or its hydraulic pressurization pump.)
The engine thrust reversers are now also controlled by hydraulics:
The thrust reverser on engine 1 is controlled by the left hydraulic system. When that hydraulic system is available, the thrust reverser nacelle can move aft to provide deceleration.
The same applies to engine 2, but it is controlled by the right hydraulic system. This significantly increases the braking distance as well.
Additionally, I have added new cold and dark states (for the hydraulic panel and anti-ice panel).
I also replaced the main caution sound.
（The pressure change of the hydraulic panel has not been achieved yet, as this is somewhat difficult.）
The development of this mod could not have been completed without the help of 777 driver and Jet-Pack. They have helped me a lot in this regard.
I have already sorted the files for FS4 and FSG. However, the FSG version of the mod only supports Android. iOS is not supported at this time. Here is the download link: https://drive.google.com/drive/folders/…l8kYgdmLpazM2ru
Installation:
For FSG: Copy the files to /storage/emulated/0/Android/data/com.aerofly.aeroflyfsg1/files/
For FS4: Add the contents of the extracted b777_300er or b777f folder to Aerofly FS 4 Flight Simulator\aircraft\b777_300er or b777f
