The final major derivative was the 707-320, which featured an extended-span wing and JT4A engines, while the 707-420 was the same as the -320, but with Conway turbofan engines. Though initially fitted with turbojet engines, the dominant engine for the Boeing 707 family was the Pratt & Whitney JT3D , a turbofan variant of the JT3C with lower ...

波音707（英语：Boeing 707）是美国波音公司在1958年至1979年间研制的中型、长航程、窄体、四发喷气客机。 波音707是第一架服役的波音喷气客机，它的原型被命名为367-80，采用后掠下单翼；后掠垂直尾翼顶端装有天线，水平尾翼靠下安装。

Oct 21, 2023 · The Boeing 707-320B was a variant of the -320. Notable modifications included adding a second inboard kink on the wings, as well as using curved low-drag wingtips instead of the earlier blunt ones. These changes improved the aerodynamics of the aircraft and increased the maximum take-off weight to 328,000 lb.

波音707是美國 波音公司在1950年代研發的首款四引擎噴射式 單走道客機，由波音367-80設計發展，載客量為140至189人，航程為2,500至5,750海里（4,630至10,650公里） [3] 。 707是波音的首款噴射機，採用後掠翼、引擎吊艙等新式設計。

As the 707-320 Intercontinental design was firmed, NWA seized the opportunity to add that type and enjoy Northwest had moved decisively to introduce jet equipment over the North Pacific with its introduction of the DC-8, but Boeing's steady evolution of the 707 platform won NWA over with its model 720B for domestic and Hawaiian routes.

e-3哨兵是基于波音707/320商用机身的改进型号，具有旋转雷达天线罩。 该天线罩直径为30英尺，厚度为6英尺，由两个支柱支撑在机身上方11英尺处。 它包含一个雷达子系统，可以监视从地球表面到平流层，跨越陆地或水域的目标。

The Boeing 707-320B is an early American narrowbody Quad-Jet, sold at Clarance International Airport. The Boeing 707-320B has a rarity level of 1 (Widespread). 208 nm. (Pasted from Wikipedia) Developed from the Boeing 367-80 prototype first flown in 1954, the initial 707 first flew on December 20, 1957.

The 707-120 and 320 were later reengined with JT3D turbofans (in place of the original JT3 and JT4 turbojets) to become the 707-120B, and the 707-320B respectively. The 707-320C was a convertible model, the 707-420 was powered by RollsRoyce Conways, while the proposed CFM-56 powered 707-700 upgrade was flight tested in the late 1970s but never ...

707-320. Actually the second-oldest 707. Predates the 720 and 707-220. PA and TW had these in service by 1959. Things to note: it’s longer than a -120 etc, has a big ventral fin, t/c on all 4 engines, JT4A’s like a -220, and practically an all-new wing. The wing’s the big main difference.

In 1959, the 707-320 was used for the first time on a scheduled flight around the world. On February 23, 1960, a -320 set a sensational record by covering the distance of 3033 km between Hong Kong (HKG) and Tokyo (TYO) with an average ground speed of 1223 km/h.