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  2. Ducted fan - Wikipedia

    en.wikipedia.org/wiki/Ducted_fan

    The duct or shroud is an aerodynamic ring which surrounds the fan and closely fits the blade tips. It must be made rigid enough not to distort under flight loads nor touch the blades as they turn. The duct performs several functions: Principally, it reduces the vortices created by air flowing round the ends of the blades.

  3. Turbofan - Wikipedia

    en.wikipedia.org/wiki/Turbofan

    Schematic diagram illustrating a 2-spool, high-bypass turbofan engine with an unmixed exhaust. The low-pressure spool is coloured green and the high-pressure one purple. Again, the fan (and booster stages) are driven by the low-pressure turbine, but more stages are required. A mixed exhaust is often employed.

  4. Components of jet engines - Wikipedia

    en.wikipedia.org/wiki/Components_of_jet_engines

    The air intake (inlet U.S. [6]) is an aerodynamic duct extending from an entry lip to the engine fan/compressor. For supersonic intakes with variable geometry it is called an intake system, referring to the need for shock-wave and internal duct flow management using variable position surfaces (ramps or cones) and bypass doors. [7]

  5. CFM International CFM56 - Wikipedia

    en.wikipedia.org/wiki/CFM_International_CFM56

    Once restored, the life limited parts must be replaced after: 20,000 cycles for the hot section ($0.5m), 25,000 for the axial compressor, and 30,000 for the fan and booster ($0.5m-$0.7m) for a recent CFM56. The whole engine parts cost more than $3m, $3.5 to $4m with the shop work-hours, around $150 per cycle.

  6. General Electric CF6 - Wikipedia

    en.wikipedia.org/wiki/General_Electric_CF6

    Two booster stages were added to the LP (low pressure) compressor and the last two stages of the HP compressor were removed [6] which increased the overall pressure ratio to 29.3. Although the 86.4 in (2.19 m) diameter fan was retained, the airflow was raised to 1,450 lb/s (660 kg/s), yielding a static thrust of 51,000 lb f (227 kN).

  7. Sexual abuser financially manipulated victims - AOL

    www.aol.com/sexual-abuser-financially...

    Essex Police said more victims contacted the force saying they were abused by Gallagher. "These victims have waited eight years since reporting to get justice and hold Gallagher accountable," said ...

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