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2. Power transfer unit - Wikipedia

   en.wikipedia.org/wiki/Power_transfer_unit

   Large transport category aircraft with hydraulically powered flight controls and utilities typically have multiple, independent hydraulic systems powered by a combination of engine-driven and electrically driven hydraulic pumps. Multiple hydraulic systems are typically needed for redundancy, where for instance if one system fails or loses ...

3. Ram air turbine - Wikipedia

   en.wikipedia.org/wiki/Ram_air_turbine

   A ram air turbine (RAT) is a small wind turbine that is connected to a hydraulic pump, or electrical generator, installed in an aircraft and used as a power source. The RAT generates power from the airstream by ram pressure due to the speed of the aircraft. It may be called an air driven generator (ADG) on some aircraft. [1]

4. Learjet 25 - Wikipedia

   en.wikipedia.org/wiki/Learjet_25

   The landing gear, brake, flap and spoiler systems are hydraulically operated. On aircraft 25-061 through 25-180 the engine driven hydraulic pumps supply fluid under a pressure of 1,500 psi (10.3 MPa). System pressure is maintained at 1,250 to 1,500 psi (8.6 to 10.3 MPa) by a pressure regulator.

5. Components of jet engines - Wikipedia

   en.wikipedia.org/wiki/Components_of_jet_engines

   A variation of this is the APU installed in a Boeing F/A-18 Hornet; it is started by a hydraulic motor, which itself receives energy stored in an accumulator. This accumulator is recharged after the right engine is started and develops hydraulic pressure, or by a hand pump in the right hand main landing gear well.

6. Axial piston pump - Wikipedia

   en.wikipedia.org/wiki/Axial_piston_pump

   Axial piston pumps are used to power the hydraulic systems of jet aircraft, being gear-driven off of the turbine engine's main shaft, The system used on the F-14 used a 9-piston pump that produced a standard system operating pressure of 3000 psi and a maximum flow of 84 gallons per minute.

7. Accessory drive - Wikipedia

   en.wikipedia.org/wiki/Accessory_drive

   The accessory drive is a gearbox that forms part of a gas turbine engine. [1] Although not part of the engine's core, it drives the accessories – such as generators, pumps for fuel and lubrication oil, air compressors, hydraulic pumps and engine starters – that are otherwise essential for the operation of the engine or the aircraft on which ...