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Airbus 380: Hydraulic System

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by

Josh Unger

on 18 April 2014

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Transcript of Airbus 380: Hydraulic System

Airbus A380: Hydraulic System
The Airbus
“Provides airlines with the best opportunities to optimize revenue across their networks – with more seats for growth, connecting traffic, and higher yields by offering more capacity when and where people want to fly."
Basic Overview...
...Basic Overview
Built to compete with Boeing 747
Max take-off weight = 569 tons, or 1,254,430 pounds
Max landing weight = 862,000 pounds
First flight = April 27, 2005
First airline with this aircraft was Singapore Airlines
Entered into service October of 2007
A380 Hydraulic System:
The A380 is the first commercial aircraft to use a 5000-psi hydraulic power generation and fluid conveyance system

Originally outlined for military use

This higher-pressure technology reduced:
Weight of the entire hydraulic system by a metric ton, compared to the 3,000-psi system

With the 5000-psi system, the control valves and actuators are smaller, lighter, and cheaper than ever before
2 fully independent hydraulic systems labeled:
Green (Engines 1 & 2)
and
Yellow (Engines 3 & 4)
8 engine driven pumps
4 electric pumps

Hydraulic fluid is used for:
Flight controls
Landing gear
Flap extension
Cargo doors
The brake systems
The A380 has a double-deck:
Can carry up to 525 passengers in a three-cabin setting
853 seats in a single class setting
Largest commercial aircraft in the world to date

Can fly 8,500 NM without refueling
Example: from Chicago, the A380 can fly anywhere in the world, except for Western Australia, nonstop
A380 vs. B737
Hydraulic System
Both the A380 and B737 use two systems, whether Green and Yellow or A & B

Hydraulic Pressure
A380 uses a 5000-psi system while B737 uses 3000-psi system
Green & Yellow Systems
Green System Components
Ailerons
Spoilers
Rudder
Elevator (left side)
Flaps System 1
Slats System 2
Landing Gear (wing & nose)
Nosewheel Steering
Cargo Door (hand pump)
A380 vs. B737
A380 has disconnecting pumps
Can completely isolate a pump from the system if it is leaking or contaminated
Allows the airplane to be dispatched if one pump isn’t working

B737 does not have disconnecting pumps
Yellow System Components
Ailerons
Spoilers
Rudder
Elevator (right side)
Flaps System 2
Slats System 1
Landing Gear (body)
Bodywheel Steering
Major consumers of
hydraulic

fluid
: (4900-5100)
Landing gear
Brakes
Steering

Electrical backup system called, LEHGS:
Local electrical hydraulic generation system
Landing Gear, Steering, and Breaking

Electrical Backup Hydraulic Actuator, EBHA
Flight controls
A380 vs. B737
Hydraulic System
A380's primary hydraulic power is supplied by 4 engine driven pumps per system
Two engine driven pumps per engine

B737's primary hydraulic power is supplied by 3 separate systems
One engine driven pump and one electric pump per engine
Standby System Components
Questions?
1.
In the event of an emergency one of the two independent electrical circuits can power everything except what?

A. some outboard spoilers and ailerons
B. the landing gear
C. the brake system


Some outboard
spoilers and ailerons

Which engines pressurize
the green system?

A. Engines 1 and 3
B. Engines 2 and 4
C. Engines 1 and 2
2.


Engines 1 and 2

C.
What is the hydraulic system
on the A380 pressurized to?

A. 3000-psi
B. 5000-psi
C. 6000-psi


5000 Psi

B.
3.
One hydraulic circuit can power all flight control surfaces and...
In an emergency, one of the two independent electrical circuits can power all surfaces, too
Except some outboard spoilers and ailerons

1 fire shut-off valve
per engine
Closing the valve prevents hydraulic fluid from flowing into the pump and creating a bigger fire
Alternate braking
Alternate nosewheel steering
Inboard ailerons
Rudder
Elevators
Slats
Spoilers
Thanks for watching!
"Airbus, 2014"
A.
Two fully independent hydraulic systems:
Labeled
Green
and
Yellow
8 engine driven pumps
4 electrical pumps

Hydraulic fluid is used for:
Flight controls
Landing Gear
Flap Extension
Cargo Doors
The Brake System
Major consumers of
hydraulic

fluid
(4900-5100):
Landing Gear
Brakes
Steering

Electrical backup system called, LEHGS:
Local electrical hydraulic generation system
Landing Gear, Steering, and Breaking

Electrical Backup Hydraulic Actuator, EBHA
Flight controls
Full transcript