2006-12-15 01:53:43 · 3 answers · asked by Van der stone 1 in Cars & Transportation ➔ Aircraft
This would depend on the aircraft being looked at I guess. But a typical airliner will have 3 independant systems with backup pumps on each of the systems. Those hydraulic pumps will be a mixture of engine-driven and electrically driven pumps to add yet another dimension of redundancy, and the most critical of them will probably be additionally powwered by an Air-Driven Gyro (ADG) that deploys into the wind and uses Ram air to turn a turbine.
The aircraft will typically be capable of flying with up to 5 of the 6 pumps inoperative and two of the three systems completely offline. Hydraulic systems are extremely redundant and unless something new and unforeen (like a turbine blade shearing all three systems in flight...) happens it is nearly impossible to lose all hydraulic systems.
2006-12-15 08:50:47 · answer #1 · answered by Jason 5 · 1⤊ 0⤋
one million.Auxiliary ability unit activation: interior the 1st case, all ability ingredients would properly be operated, because of the fact air is bled from the APU compressor and its gearbox drives the two hydraulic pumps and electric turbines. 2.Hydrazine emergency ability instruments (EPU): An EPU, or emergency ability unit, is a turbine pushed by hydrazine (N2H4). Hydrazine is decomposed, in presence of oxygen, into warm gases in accordance to the reaction as follows: N2H4 + O2 ? N2 + 2H2O. The gases are canalized to the turbine that drives an electric generator and/or a hydraulic pump. An EPU can stay to tell the story for a quick era in basic terms, not sufficient for an emergency landing; this technique is then put in on protection stress plane to allow the team to get waiting for a secure ejection 3.Battery operated hydraulic pumps: it extremely is according to hydraulic pump operation by DC electric autos, presented by an emergency battery. 4.Ram air turbines: it extremely is an extremely ordinary technique, based in basic terms on the kinetic ability of the plane, is composed in extending outboard a ram turbine, that's then pushed by the exterior air. The turbine operates an electric generator and/or hydraulic pump, able to furnish a minimal ability for the operation of the essential controls, regularly rudder, elevators and landing gears, probably ailerons, which permit an emergency landing
2016-12-30 11:30:44 · answer #2 · answered by ludwig 3 · 1⤊ 0⤋
Most modern aircraft have a device called a RAT( RAM AIR TURBINE) which is deployed when various hydraulic systems fail.
2006-12-15 06:27:24 · answer #3 · answered by l1011graham 2 · 1⤊ 0⤋