Some aircraft it refers to the flight control systems. i' ve read some " theories" of chaps calling them " balance tabs" which wouldn' t make a lot of sense to me during normal operations ( why should fully powered hydraulic flight controls need a classic balance tab? was designed as an emergency system that would enable the pilot to fly a battle- damaged plane to a safe landing or ejection behind friendly lines.
#HYDRAULIC FLIGHT CONTROL SYSTEM MANUAL#
a comparison of control surface hinge moments with those of subsonic jets dictates a fully powered actuation system with no direct pilot manual reversion.
#HYDRAULIC FLIGHT CONTROL SYSTEM FULL#
fully powered flight controls fully powered flight controls to actuate the control surface the pilot has to give full effort. the new powered elevator hydraulic control system on the md- 90 requires a new, automatic means of monitoring and controlling its pressures. the 727/ 737/ 757/ 767 all have fully powered flight control systems with trimmable tails ( stabilisers). ailerons are powered by hydraulic systems a and/ or b. If the aileron system jams, the co- pilots wheel can be used to move the spoilers ( hydraulically). Manual reversion of fully powered flight controls These utility functions require system control in order to fulfil the various tasks in the right sequence, for example to open doors, deploy mechanism and lock the doors in the open position.Manual reversion of fully powered flight controls By 7xguskvn Follow | Public System controlĪircraft and helicopters use hydraulic circuits to power different systems like flight control actuation, landing gear extension and retraction or landing gear door actuation. They are used on board different aircraft like fighters and helicopters. These piston pumps and motors are used in high reliability applications like electro-hydraulic actuators or high lift systems on commercial airplanes and military transport aircraft.Įlectrically driven pumps are also part of the Liebherr product portfolio. Liebherr develops and manufactures hydraulic pumps and motors ranging from 1,500 psi over 3,000 psi up to 5,000 psi. Liebherr-Aerospace is also capable to develop Electrical Thrust Reverser Actuation Systems, using electro-mechanical actuators instead of hydraulic actuators. The system needs to be designed in a way that a deployment of the system during flight is impossible.
Thrust Reverser Actuation Systems are considered as being safety critical. A typical hydraulically actuated TRAS comprises door actuators, locking/unlocking actuators, hydraulic valve blocks, check valves, position sensors and hydraulic control units. Liebherr-Aerospace provides the Thrust Reverser Actuation System (TRAS) to move the thrust reverser doors when activated by the pilot. This helps to reduce the stress on the landing gear brakes and constitutes a major safety feature for landing in bad weather conditions, when the aircraft brakes might no longer be effective enough to bring the aircraft to a stop. The Liebherr Ruddervator Control Systems supports the operation of the A330 MRTT boom refueling system.Ĭommercial aircraft engines are equipped with a thrust reverser helping to decelerate the aircraft after touch down by reversing the direction of the exhaust stream. The most advanced air refueling systems, used on A330 MRTT, A400M, KC-46 or KC-390 are equipped with Liebherr Hose Drum Drive Systems. The world’s first commercial aircraft featuring folding wingtips, the Boeing B777X, is equipped with a hydraulically driven folding mechanism made by Liebherr, including a power drive unit, geared rotary actuators and latch/locking actuators.
Latch and Locking systems include landing gear up-locks and ramp door latch actuators for military transport aircraft. Liebherr also is able to supply complete customized door actuation systems featuring actuators, control manifolds and system electronic controllers with embedded software. We develop and manufacture actuators to open and close doors for applications like cargo doors, weapon bay doors or landing gear doors. Our product portfolio ranges from door actuators, latch and locking systems up to complex actuation systems for wing tip folding or air refueling. Liebherr supplies a wide variety of utility actuation systems for multiple applications. Generating- and profile-grinding machinesĮlectric drive systems for off-highway applicationsīuilding construction and civil engineering Heavy Lift Handling in Rostock, Germany - TCC 78000
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