Aware of the competition from the Rolls-Royce Conway turbofan, Pratt & Whitney decided to develop the JT3D turbofan from the JT3C turbojet for later deliveries of the Boeing 707 and the Douglas DC-8, then nearing entry into service. A 2-stage fan replaced the first 3 stages of the 9-stage JT3C LP compressor.

During the 1950s the J57 was an extremely popular engine, with numerous military applications. Production figures were in the thousands, which led to a very reliable engine. Consequently, it was only natural for Boeing to choose the J57 civil variant, the JT3C, for their 707 jetliner. Douglas did likewise with their DC-8.

2019年8月14日 · Pratt & Whitney’s first-generation turbofan was the JT3D (a derivative of the company’s first-generation turbojet, the JT3C), which entered service in March 1961, and, due to its greater power and lesser noise and fuel consumption, quickly replaced the JT3C (and also P&W’s second-generation turbojet, the JT4A) on the aircraft that had ...

Pratt & whitney developed the 4,500-kilogram (10,000-pound) thrust JT3 turbojet engine in 1950. It powered such military aircraft as the Boeing B-52, Convair F-102, Douglas A3D, Lockheed U-2, McDonnell F-101, and North American F-100, and a majority of Boeing 707 and Douglas DC-8 …

707 系列共有四种发动机型号,分别为普惠JT3、JT3D、JT4和劳斯莱斯康威。 此外,测试型号还安装有CFM56发动机。 这四台发动机外观上极为相似,因此从外形上难以分辨其型号。 波音707 的乘客量约为219 人(经济、商务两级)或258人(一级),主要市场是长途主干线。...

2024年12月10日 · The 707 pre-dated the ”wide-body” airliners, having a fuselage width of 12 feet, 4 inches (3.759 meters). The first versions were powered by four Pratt & Whitney Turbo Wasp JT3C-6 turbojet engines, producing 11,200 pounds of thrust (49,820 kilonewtons), and 13,500 pounds (60.051 kilonewtons) with water injection.

2022年11月10日 · The Pratt & Whitney JT3D was the first widely successful turbofan, powering some of the most iconic and impactful aircraft of the day, including the Boeing 707 (shown here), the Douglas DC-8, the Boeing KC-135 and the Lockheed C-141.

Pratt & Whitney Aircraft began development of its first production turbofan, the JT3D, in the late 1950s, by taking advantage of the service-proven JT3 (J57) gas generator, and adding a two-stage front fan. The JT3D made its first flight on a Boeing 707-120 on June 22, 1960, and powered the Boeing 707-120B, Boeing 720, and Douglas DC-8-50 ...

2003年7月19日 · The civil version, the JT3 made possible the Boeing 707 and Douglas DC-8. Production began in 1953 and lasted to 1970 (per U.S. Air Force Museum. Pratt & Whitney gives the production dates as 1951 - 1965). Over 21,000 were produced.

Early in the 1960s, the Pratt & Whitney JT3D turbofan engines were fitted to provide lower fuel consumption, reduce noise and further increase range to about 6,000 miles. Following the success of the 707, Boeing has developed seven commercial jetliner models, each tailored to specific air route requirements.