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  2. Bleed air - Wikipedia

    en.wikipedia.org/wiki/Bleed_air

    Additionally, bleed air is used to keep critical parts of the plane (such as the wing leading edges) ice-free. [6] Bleed air is used on many aircraft systems because it is easily available, reliable, and a potent source of power. For example, bleed air from an airplane engine is used to start the remaining engines.

  3. Environmental control system - Wikipedia

    en.wikipedia.org/wiki/Environmental_control_system

    Air bled from the engine fan is blown across the pre-cooler, located in the engine strut, and absorbs excess heat from the service bleed air. A fan air modulating valve (FAMV) varies the cooling airflow to control the final air temperature of the service bleed air. Notably, the Boeing 787 does not use bleed air to pressurize the cabin.

  4. Components of jet engines - Wikipedia

    en.wikipedia.org/wiki/Components_of_jet_engines

    The components above, except the shaft, are linked by a parameter common to all of them, the flow rate of gas passing through the engine which is the same for all components at the same time (as a basic statement this is an acceptable approximation which ignores the addition of fuel in the combustor and bleeding air from the compressor). [4]

  5. Cabin pressurization - Wikipedia

    en.wikipedia.org/wiki/Cabin_pressurization

    By the time the cold outside air has reached the bleed air valves, it has been heated to around 200 °C (392 °F). The control and selection of high or low bleed sources is fully automatic and is governed by the needs of various pneumatic systems at various stages of flight. Piston-engine aircraft require an additional compressor, see diagram ...

  6. General Electric CJ805 - Wikipedia

    en.wikipedia.org/wiki/General_Electric_CJ805

    The bleed valves close as the engine RPM increases towards operational speeds. Another solution was the use of variable inlet vanes. The angle of incidence of the vanes at the front of the engine is changed to partially block the inlet area, which reduces the compression, and also angle the air onto the compressor blades to prevent stalling ...

  7. Rolls-Royce Trent 7000 - Wikipedia

    en.wikipedia.org/wiki/Rolls-Royce_Trent_7000

    Maximum pressure ratio is increased to 50:1 from 36:1 and it has a bleed air system for environmental control and wing anti-icing. [17] Compared to the 20-year-older Trent 700 introduced in 1995, the Trent 7000 features a smaller fan hub and a larger fan —112 inches (2.8 m) compared to 97 inches (2.5 m).

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  9. FADEC - Wikipedia

    en.wikipedia.org/wiki/FADEC

    The inputs are received by the EEC and analyzed up to 70 times per second. Engine operating parameters such as fuel flow, stator vane position, air bleed valve position, and others are computed from this data and applied as appropriate. FADEC also controls engine starting and restarting.

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