The 747 is a four-engined jet aircraft, initially powered by Pratt & Whitney JT9D turbofan engines, then General Electric CF6 and Rolls-Royce RB211 engines for the original variants. With a ten …

波音747，又稱為「珍寶客機/巨無霸客機」（Jumbo Jet） [6][7]，是全世界首款生产出的 廣體 民航飛機，由 美國 波音民用飞机集团 製造。 波音747雛型的大小是1960年代被廣泛使用的 波 …

The Pratt & Whitney JT9D high-bypass turbofan engine was developed for the Boeing 747. The JT9D program was launched in September 1965 and the first engine was tested in December …

The 747-8 incorporates breakthrough technology—the GEnx engine, a wing design with better performance, and lighter alloys and composites—that substantially reduces fuel consumption. …

2019年4月19日 · While the science behind the high bypass ratio engine in a 747 plane may seem complicated, the results are striking. It's capable of delivering over 70% more...

7 小时之前 · The jet was the first Boeing 747-400 produced and served as a prototype. ... Pratt & Whitney then used the aircraft as a test bed for its PW4000 series engines, which would power …

In summary, the Boeing 747 is a wide-body airliner, powered by four turbofan engines, with a fuselage constructed of aluminum and composite materials, wings swept back to provide lift …

Boeing used a new method of spotting potential hazards known as "fault tree analysis," where engineers could easily see the impact of a failure of one part or system on other parts. The …

The Boeing 747-400 is a four-engined long-range widebody airliner with a capacity of maximum 660 passengers in a partial double deck configuration produced by the American manufacturer …

New engines offered on the 747-400 included the Pratt & Whitney PW4056, the General Electric CF6-80C2B1F, and the Rolls-Royce RB211-524G/H. [12] The engines offered lower fuel …