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  2. McDonnell Douglas MD-80 - Wikipedia

    en.wikipedia.org/wiki/McDonnell_Douglas_MD-80

    The "main improvement" was the installation of Pratt & Whitney JT8D-290 engines (never built) with a 1.5 in larger diameter fan that would allow for a 6 dB reduction in exterior noise. [27] The MD-80 Advanced was to incorporate the advanced flight deck of the MD-88, including a choice of reference systems, with an inertial reference system as ...

  3. Honda D engine - Wikipedia

    en.wikipedia.org/wiki/Honda_D_engine

    4th Gen ZC Identified by: Internal coil. OBD1 EFi system (grey plug). No cam angle sensor on exhaust cam, now located in distributor. Rubber plug where cam angle sensor would mount. Black cam cover. No PGM-EFi plate on the inlet manifold, replaced with three ribs instead. P29 stamped on inlet manifold.

  4. Wankel engine - Wikipedia

    en.wikipedia.org/wiki/Wankel_engine

    This is because of the higher combustion frequency and slower combustion. Exhaust gas temperatures can exceed 1300 K under high load at engine speeds of 6000 rpm −1. To improve the exhaust gas behavior of the Wankel engine, a thermal reactor or catalyst converter may be used to reduce hydrocarbon and carbon monoxide from the exhaust. [89]

  5. Rolls-Royce Trent - Wikipedia

    en.wikipedia.org/wiki/Rolls-Royce_Trent

    The swept fan blades produce 2–3% more flow at a given speed with the same 2.8 m (110 in) fan, for an additional 10,000 lbf (44 kN) of thrust, while fan efficiency is 1% better. [ 30 ] [ 30 ] The HP compressor rotors and stators and the IP compressor stators were designed with 3D aerodynamics . [ 30 ]

  6. Cadmium telluride photovoltaics - Wikipedia

    en.wikipedia.org/wiki/Cadmium_telluride...

    The higher the substrate temperature is, the larger the grain size, and the fewer the number of grain boundaries in the film. If a low substrate temperature is used during deposition, grain size is commonly increased by depositing CdCl 2 on the film and subsequently annealing. This is a crucial processing step, as cells deposited at low ...

  7. Early skyscrapers - Wikipedia

    en.wikipedia.org/wiki/Early_skyscrapers

    Early skyscrapers emerged in the United States as a result of economic growth, the financial organization of American businesses, and the intensive use of land. [9] New York City was one of the centers of early skyscraper construction and had a history as a key seaport located on the small island of Manhattan, on the east coast of the U.S. [10] As a consequence of its colonial history and city ...

  8. Elevator - Wikipedia

    en.wikipedia.org/wiki/Elevator

    This rheostat (see picture) was enclosed within a cylindrical container about the size and shape of a cake. This was mounted upright or sideways on the cab wall and operated via a projecting handle, which was able to slide around the top half of the cylinder. The elevator motor was located at the top of the shaft or beside the bottom of the shaft.

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