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  2. Bypass ratio - Wikipedia

    en.wikipedia.org/wiki/Bypass_ratio

    The bypass ratio (BPR) of a turbofan engine is the ratio between the mass flow rate of the bypass stream to the mass flow rate entering the core. [1] A 10:1 bypass ratio, for example, means that 10 kg of air passes through the bypass duct for every 1 kg of air passing through the core.

  3. Pratt & Whitney PW1000G - Wikipedia

    en.wikipedia.org/wiki/Pratt_&_Whitney_PW1000G

    In 2010, Pratt & Whitney launched the development of an ultra high-bypass version, with a ratio significantly higher than the PW1100G's 12.2:1 for the A320neo, to improve fuel consumption by 20% compared to a CFM56-7 and reduced noise relative to the FAA's Stage 4 by 25 dB. In 2012, wind tunnel tests were completed on an earlier version of the ...

  4. Category:High-bypass turbofan engines - Wikipedia

    en.wikipedia.org/wiki/Category:High-bypass...

    Turbofan engines with a bypass ratio of at least 4. Pages in category "High-bypass turbofan engines" The following 49 pages are in this category, out of 49 total.

  5. Turbofan - Wikipedia

    en.wikipedia.org/wiki/Turbofan

    More recent large high-bypass turbofans include the Pratt & Whitney PW4000, the three-shaft Rolls-Royce Trent, the General Electric GE90/GEnx and the GP7000, produced jointly by GE and P&W. The Pratt & Whitney JT9D engine was the first high bypass ratio jet engine to power a wide-body airliner. [46]

  6. Kuznetsov NK-93 - Wikipedia

    en.wikipedia.org/wiki/Kuznetsov_NK-93

    In October 2013, the European Commission gave a three-and-a-half-year grant to study the Innovative Counter rOtating fan system for high Bypass Ratio Aircraft engine (COBRA). COBRA was a European Union-Russia cooperative program to study an ultra-high bypass ratio (UHBR) counter-rotating turbofan (CRTF) that was similar to the NK-93.

  7. Progress D-27 - Wikipedia

    en.wikipedia.org/wiki/Progress_D-27

    a super-high bypass ratio turbofan engine with a takeoff thrust of up to 11,000 kgf (24,000 lbf; 110 kN). An alternative engine for the Yakovlev Yak-46, the D-627 was designed to have a specific fuel consumption not exceeding 14 g/(kN⋅s) (0.5 lb/(lbf⋅h)) at a cruise altitude of 11,000 m (36,000 ft) and a cruise speed of Mach 0.8 (461 kn ...

  8. Rolls-Royce/SNECMA M45H - Wikipedia

    en.wikipedia.org/wiki/Rolls-Royce/SNECMA_M45H

    A modest fan pressure ratio, consistent with the high bypass ratio, meant a low fan tip speed could be employed. A low hot jet velocity was another major design feature. In reverse thrust, intake air entered the bypass duct, via a gap in the cold nozzle outer wall, and went through the fan, to be expelled through the intake. A small proportion ...

  9. General Electric Passport - Wikipedia

    en.wikipedia.org/wiki/General_Electric_Passport

    The GE Passport is a high bypass ratio turbofan. The engine is a twin-spool, axial-flow turbofan with a high bypass ratio of 5.6:1 and an overall pressure ratio of 45:1. The front fan is attached to the three-stage low-pressure compressor; the 23:1 pressure ratio 10-stage high-pressure compressor includes five blisk stages for weight reduction.